Overlock sewing machine

FIELD: textiles, paper.

SUBSTANCE: machine has advanced technological capabilities with automatic changeover to different types of chain and overcasting stitches. For the first time, the overlock sewing machine performs zigzag stitches not only of two-thread chain stitch, but three-thread (two-thread) overcasting having less consumption of thread in comparison with the four-thread overcasting stitch. The machine additionally comprises the units of regulation of the width of the stitch and switching off the upper moving knife in the mechanism of cutting the edge of the material. In the upper looper mechanism the unit of its switching off is provided by actuation of the solenoid and opening the kinematic link between the driven lever and the shaft of the upper looper mechanism. In the mechanism of movement of the material the unit regulating the rods in height is mounted, actuated by the stepper motor. The presser foot mechanism comprises a sensor of registration of the presser foot position in height, and the stepper motor with a cam for regulation of the pressing force of the material by the presser foot. In the machine an automatic adjustment of the machine to the rational parameters of operation is provided, the self-learning methods are used due to which the diagnostic system has the ability of self-correction of the settings, when changing the conditions of the material processing.

EFFECT: machine has a single computerised control system of its operation, enabling to simplify its operation with the expansion of its technological capabilities.

7 cl, 10 dwg

 

The invention relates to mechanical engineering, in particular to the production of overcasting sewing machines, which are used in the manufacture of sewing and knitting products in the home or in enterprises with single-piece or small batch production.

Known overcasting sewing machine described in the patent US US 6973889 B2 on CL D05B 19/00, 2005, performing overcasting stitches and having in its platform mounted the main shaft with eccentrics, propulsive: the mechanism of the needle; the mechanism of promotion material adjustment stitch length and differential; the mechanisms of the lower and upper loopers; looper mechanism involved in the formation of double-strand chain stitch. The machine has a sensor recording the angle of rotation of the main shaft, a control unit with a display, a storage device and stepper motors to change the stitch length and changes in the magnitude of the differential movements of the rails.

When performing operations on the machine to change the stitch length and differential for a given program uses a control unit with a display, a storage device and stepper motors of the mechanism of promotion material to form on the treated edge overcasting stitch with pleats and without them.

To move the machine works with ml the CSO type of stitch to another requires additional adjustments in the mechanisms. For example, when switching from overcasting stitch to perform the grinding line or tehniceskogo of overcasting stitches in the machine, remove the blade upper looper mechanism of the upper looper and the needle in the needle holder and install the needle (needles) in the multi-needle holder.

This machine does not provide the performance of various types of finishing lines of the zigzag line of chain stitch and zigzag overcasting stitches, and to switch operation of the machine with double-strand chain stitch for overcasting stitches and Vice versa - you need removing or installing the blade upper looper and the disabling or enabling of the upper movable knife. This complicates the process of operation of the machine and does not expedient to further expand the technological capabilities of the machine.

Also known overcasting sewing machine, presented in the patent of the Russian Federation No. 2078165 on CL D05B 1/18, 1993, containing mounted in the housing with the platform and receiving motion from the eccentric mounted on the main shaft: a mechanism for the needles, a mechanism for trimming the edges of the material with the lower stationary knife and the upper movable knife, the mechanisms of the upper and lower loopers, the mechanism of promotion materials, including adjustment of stitch length and size different is Ala, with levers-the holders of the rails, the clamping mechanism of material and device for feeding thread. The proposed solution allows you to create as stachelhaus-obmetochnye and overcasting stitches.

In this technical solution during the transition from double-stranded overcasting stitch on technicaly overcasting stitch or another type of stitch that you want to replace to install or remove the needle into the multi-needle holder and the upper petitely on the position of Shiites, to make the filling thread in the machine and adjust their tension. The mechanism of promotion of the material execution of the adjustment of stitch length and differential is produced by a change of angular position, respectively, of the adjusting disk and lever. The pressure of the presser foot on the material set by turning the adjusting screw in the mechanism of the presser foot. When changing the processed material, if necessary, in the mechanisms of the machine must be performed adjustment: pressure the presser foot, the provisions of the rail height, differential, length and width, stitch and others.

Thus, this solution does not allow to perform a zigzag line of chain stitches and zigzag overcasting stitches, and when moving the machine from one type to another, or when changing handled the th material must meet the regulations in the mechanisms.

The closest in technical essence to the claimed technical solution is overcasting sewing machine presented in the published patent application US US 2002/0017227 A1 on CL D05B 1/08, D05B 1/06 or NCI 112/197. Overcasting sewing machine that performs overcasting and double-strand chain stitches, containing needle holder with many needles to form stitches, making a vertical reciprocating motion, a lot of loopers, the transmitting mechanism gladiatus, indicating the movement of the needle holder in a transverse direction with respect to the transfer material and the vertical reciprocating movement of the needle holder. The machine also includes a mechanism for advancing material adjustment stitch length and differential. Part of the mechanism of promotion material includes stepper motors for regulating the stitch length and differential. The machine has a control unit with remote control, a storage device and a device management mechanisms and mechanism of the needle site of the transverse deflections of the needle, with the drive of the stepper motor and synchronized with the mechanism of promotion of Reiki for the formation of various types of zigzag double-strand chain stitch using a needle and looper.

In the car to go with treatments the key of one type of material to another, when changing the type stitch type stitch, stitch length and width of the zigzag stitch and some other parameters, adjustment of the modes is performed by a set of necessary data on the remote or performing additional adjustments in the mechanisms of the machine. Enabling or disabling mechanisms of the upper looper and drive the upper knife is carried out, respectively, installing or removing blades looper and rotating the holder of the upper knife. When preparing the machine for operation it is necessary to conduct preliminary testing on the operations and ensuring quality of line and lack of bounce in it.

In the car is not provided for performing zigzag overcasting stitch, with less consumption of the needle thread in the stitch compared to chetyrehosnym overcasting stitch. Machine when changing the type of stitch does not automatically disable the upper knife and the upper looper. With the passage of swelling in the joints in the car is not provided synchronized change of frequency of rotation of the main shaft, the adjustment of thread tension and position of the rail height.

Thus, household overcasting sewing machine is not able to perform zigzag overcasting stitch, and when performing other types of stitches required additional the Noe regulation mechanisms of the machine, what complicates the process of its operation. This is especially inconvenient when operating overcasting machine with advanced technological capabilities that can perform a large variety of stitches on a wide range of materials.

The invention aims at the creation of such overcasting sewing machine, in which when the expansion of technological opportunities to achieve quality and reliable implementation of its workflow does not require special knowledge, action and skill in its operation. Use in the car of new design devices, electro-technical equipment and information and methodological support for diagnostics and control, allows you to expand the technological capabilities overcasting sewing machine and to eliminate the above mentioned disadvantages, ensuring the quality and reliability of the formation of various types of grinding, trimming and overcasting stitches.

The desired result is achieved that in the case overcasting sewing machine that performs overcasting and double-strand chain stitches, established mechanisms of the needle, with the nodes of the vertical and lateral deviations; the mechanism for trimming the edges of the material with the lower stationary knife and the upper movable knife having nodes off the top of the knife and regulation values Serenissima; the mechanism of promotion material adjustment stitch length, differential and rack position in height; the mechanism of the presser foot; the mechanism of the lower looper mechanism of the upper looper with node disable it in the work; the mechanism looper double-strand chain stitch and the mechanisms for submitting thread. On the main shaft of the machine is fixed eccentrics, provides for the movement of parts of the machine. To control the operation mechanisms of the machine serves as a common control system that contains the control unit with remote control, processor and storage device, as well as information and methodological support.

Overcasting sewing machine includes a mechanism for the needle, in addition to host its vertical movements, cross-site variance. The site of the transverse deflections of the needle includes a stepper motor, on the shaft which has a pinion which is in mesh with the sector gear. Toothed sector has a groove in which the wings, and it passes the rod attached to the upper rail. Moreover, to save the angle of the needle relative to the loopers, at different positions in the formation of zigzag stitches, the frame with the needle bar has two guides and the drive from the scenes with the sector gear. Stepper motor mechanism needles included in the overall control system and the slave is the machine. The position of the needle (needle) relative to the hole needle plate is installed in accordance with the implementation program set on the remote control of the type of stitch. This allows you to accurately position the needle in the formation of zigzag overcasting stitch, as well as during the transition to other types of stitches.

The mechanism for trimming the edges of the material with the lower stationary knife and the upper movable knife has nodes: movement of the upper knife, turn it off, and regulation of the width of the stitch. For the message of the movement of the upper movable knife, the mechanism includes the Cam mounted on the main shaft kinematically connected through a connecting rod with duplechin lever-fork. In the slot of the lever-fork is the axis on which between the horns of the lever-fork installed the link, and at one of its ends pivotally mounted to the slider. The slider is held in the guide, which is fixed on the shaft of the electromagnet node-off knife. To disable the upper movable knife axis during rotation of the shaft of the electromagnet has a contact profile in the machine casing, which leads to the displacement axis of the slide and the holder of the upper knife down and the output axis kinematic connection with the lever-fork. When the output axis of the groove of the lever-fork mechanism is off the top of the knife. The electromagnet site off of the upper movable knife VK is ucen into the overall control system of the machine, which tells him the command to disable or enable the upper knife, according to the control program of the machine.

The control unit of the width of the stitch is designed to change the position of the lower knife and contains a stepper motor, which via a shaft, the transmission gear transmits the displacement of the adjusting screw and the holder with the lower knife. To provide horizontal displacement adjusting screw is screwed into the nut-sleeve, mounted in the machine casing. The rotation of the tool holder is fixed transverse pin in the axis of the tool holder held in the guide housing of the machine. The lower knife holder is drawn in to the upper knife spring. In the needle plate to change the stitch width is provided by the displacement of the finger on the needle plate. Stepper motor control unit position of the lower knife included in the machine control system, which tells him the command of the rotation shaft according to a preset on the remote work program.

Use the trimming mechanism edges of the material with the lower stationary knife and the upper movable knife, the control unit the position of the lower knife with finger needle plate and in the mechanism of needle - host transverse deflection of the needle allows you to adjust not only the width overcasting stitch, but the position of the double-stranded chain stitch relative to the workpiece is on the edge of the material. Formed zigzag overcasting stitch in addition to decorative finishes machined edge of the material, enables you to replace chetyrehyarusny overcasting stitch to achieve a saving of threads, as in a zigzag overcasting stitch is used one needle thread instead of two in cheterehetazhnom overcasting stitch.

In the mechanism of the lower looper, to simplify the structural design of the machine, contains a leading space chetyrehzvennoj the message transverse deviations of the loopers to form stitches: chain double-strand and overcasting. Slave link of chetyrehzvennoy mounted on the shaft of the machine lower looper and made duplechin, in which the slave shoulder informs the transverse deviation of petitely chain stitch.

The mechanism of the upper looper contains eccentric shaft, connecting rod, clutch lever, axle, front lever, the holder and the upper petitely. To switch off from work the upper looper, in the formation of only double-stranded (type 401 or 404) or for flat seams (type 406) stitches, contains a node outage. To disable the upper looper, node shutdown mechanism has a solenoid, which is connected with the rod, and has a spring for fixing the rod to the upper looper in its lower position with the simultaneous opening connection the s pin of the slave arm with the hole of the lever-ROM drive and connection of the lever-ROM through the hole with the rod, installed in the machine casing. Disabling the action of an electromagnet included in the work of the mechanism under the action of the spring, which allows the lever-ROM to withdraw from engagement with the rod attached to the machine casing, and install the kinematic connection with the pin of the slave arm. The electromagnet mechanism upper looper included in the control system of the machine. Enable (disable) in the operation of the electromagnet can be made when installing the type of stitch on the remote control.

The mechanism of chain stitch looper has two nodes: transverse and longitudinal deviations. The lever host transverse deviations looper receives motion from duplicera lever mechanism of the lower looper and attached to the shaft of the mechanism of chain stitch looper. In the front part of the shaft mounted holder looper. The node of the longitudinal variance looper includes eccentric, a connecting rod, the leash and the shaft holder.

The mechanism of promotion material contains the following nodes: a longitudinal and vertical movement of the rails, regulation of stitch length, regulation differential and adjusting the position of the rails in height.

In the control unit of the stitch length to provide automatic regulation of stitch length rails installed a stepper motor, which via a shaft, the transmission gear; a pusher, suplicy lever changes the angular position of the guide passing it slide. The change in angular position of the slide with the axle in it, kinematically connected with the cuff, leads to a change in the direction of movement of the rod and, consequently, the magnitude of the angular deviations of the leading arm of the node of longitudinal movement of the rails. Stepper motor control unit stitch length is included in the control system of the machine. Changing the rotation angle of the shaft of the stepper motor can be made according to the program installed on the remote machine. This change of the angle of rotation of the shaft can occur when preparing the machine for operation, and in the mode of operation of the machine, as for fixing the release of the needle from the material and control the machine is equipped sensor recording the angle of rotation of the main shaft.

The control unit differential mechanism promotion contains a stepper motor, shaft with the gear, rail-guide, and a link pivotally connected to the slide axis passing in the arcuate groove of the lever, which has a kinematic connection through the connecting link with the lever-holder for more Reiki. Gear sector takes place in the guide housing. Stepper motor control unit differential and integrated into the overall control system of the machine. Change the rotation angle of the shaft of the stepper motor is made according to the program, installed on the remote machine.

The control unit magnitude of vertical displacements of the rails includes a stepper motor, which shaft has a knee hinge connected to the sliders within the tail portion of the lever holders. Stepper motor control unit magnitude of vertical displacements of the rails included in the control system of the machine. Change the rotation angle of the shaft of the stepper motor is made according to the program installed on the remote machine. Such a change of the angle of rotation of the shaft may occur automatically as when preparing the machine for operation, and in the mode of operation of the machine under the program, taking into account the thickness of the processed material and the operation mechanisms of the machine.

The mechanism of the presser foot to login automatically measure the thickness of the processed material and change efforts compressing the material presser foot, contains the presser foot mounted on the rod, which is held in the collet, and having on yourself wearing a leash, which is kinematically connected to the sensor check the position of the presser foot height, the spring and the sliding sleeve, changing its position from the rotation of the Cam mounted on the shaft of the stepper motor. The recorded sensor value of lifting presser foot is passed in the General system which it controls the operation of the machine, and formed in her team reported to the stepper motor. Regulation efforts compressing the material can be made automatically, as when preparing the machine for operation and while performing an operation.

The feeders thread contains metapodatki on the moving parts of mechanisms needles and loopers, and on the slopes of the filling thread gauges its consumption, consisting of a disk with holes passing between svetolitiye. The thread covers a pulley rigidly mounted on the drive with the holes. Disk with holes freely rotates on an axis, which is held in the collet of the machine housing. Regulating the thread tension occurs in the controller with graphite filler, the contact force plates to each other is achieved by varying the magnitude of the voltage regulator. This voltage regulation is created in the control system of the machine in accordance with the selected algorithm.

To prepare for the operation, diagnosis and control parameters of the machine using the control system containing the remote control, the processor and storage device, comprising a control unit, which receives information from sensors, recording the angle of rotation of the main shaft, tension and flow of the thread and position the height of the presser foot. The control unit displays the required com is NDI for actuating electrical devices of the machine: solenoids and stepper motors. The storage device contains nested in a constant and memory management commands, diagnose and program execution stitches, and using the attached information and methodological support, gets the necessary information from the sensors, control unit and memory unit, and communicates the necessary commands to the remote control, removable flash memory, or plug diagnostic equipment, to the control unit and actuators machines: stepper motors and solenoids. The car has the magnets off the top of the knife and the upper looper, regulating the thread tension, stepper motors regulation of stitch length, differential, stitch width and effort to pressure the presser foot. All electrical devices are connected to the power supply through the power supply. The machine has a built-in servo motor, which also receives commands from the control unit of the machine, and has the ability to stop the operation of the machine in a predetermined position of the needle and to regulate the speed of rotation of the shaft according to the algorithm and the program of her work.

The remote control has inputs for receiving information from external sources and for their transmission. To store information about the programs in machine uses memory (permanent memory is b) you can store information on removable media (flash memory).

When switching from one type of stitch to another machine provides for the possible change of needles (one or two), the upper looper on sericel (in the formation of double-strand overcasting stitch), automatic shut-off of the upper movable knife and the upper looper and automatically changing the settings of the adjustment mechanisms of the machine in automatic mode.

The objective is achieved by the fact that the expansion of technological capabilities overcasting sewing machine and simplify its operation it contains: mechanisms needles with nodes in the vertical and lateral deviations; the mechanism of the upper looper with the node it off; the mechanism for trimming the edges of the material with the lower stationary knife and the upper movable knife, with sites off the top of the knife and regulation of the magnitude of the width of the stitch; the mechanism of promotion material adjustment stitch length, differential and rack position in height; the mechanism presser foot stepper motor control efforts compress; feeders thread with sensors register the consumption of thread and regulating devices the size of their tension, as well as the system control machine, comprising a control unit with remote control, the processor and the storage device is on, the sensors registering the input variable, and stepper motors and solenoids.

The content of the claimed invention is illustrated by the following figures: figure 1 is a kinematic diagram of the machine; figure 2 is a kinematic diagram of the control unit of the width of the stitch in the mechanism for trimming the edges of the material; figure 3 - General view of the machine with the layout of the sensors; 4 is a diagram of a control system of the machine; figure 5 - types of stitches; 6 - options for the location of the needle relative to the holes in the needle plate; 7 - types of zigzag lines; Fig - block diagram, information and methodological support of the machine; figure 9 - sensor recording the flow rate of the thread and figure 10 - block diagram of the control parameters of the machine when changing the thickness materials.

Overcasting sewing machine (1) includes a mechanism needle 1 made in the form of two nodes in the vertical and lateral deviations of the needle 1. The needle 1 is fixed in the needle holder 2, which can be installed four needles. Two positions of the needles 3 are intended for the formation of chain stitches, and the other two positions of the needles 1 under the formation of stachelhaus-obmetochnye stitches. The needle holder 2 is fixed on the lower end of the needle bar 4, on which the tightening screw 5 attached a leash 6. Leash 6 pivotally connected to the link 7, the upper cylinder, which is articulated with asana with the crank 8. The crank 8 is fixed on the upper shaft 9 passing in the two sleeves of the vehicle body. On lead 6 is attached to netmotivated 10, and on the link of the thread take - up 11. At the other end of the shaft 9 tightening set screws lever 12 which is pivotally connected with the connecting rod 13. The bottom head of a rod 13 mounted on the Cam mechanism 14 of the needle. The Cam 14 is mounted on the main shaft 15 of the machine.

The needle bar mechanism 4 needle passes in two sleeves of the frame 16, which has a hinged connection along the guides 17 and 18 to the machine body through the sleeve 19 and 20. On the upper rail 18 mounted axle with stone 21, which is held in the guide arm 22. The upper end of the lever 22 has a hinge in the machine casing, and the bottom has a swivel connection with the rack-bar 23. Rack-strap 23 receives movement from the gear pair rack-strap 23 and the gear 24"mounted on the shaft of the stepper motor 25. The position of the needle 1 (needles) relative to the hole needle plate is determined by the angle of rotation of the shaft of the stepper motor 25, which is included in the overall control system of the machine.

The mechanism of the lower looper 26 is a Cam 27 mounted on the main shaft 15 of the machine, the rod 28, the two shoulders of the lever 29, the shaft 30 and the holder 31, in which is mounted a lower petitely 26. The shaft 30 is held in two bushings mounted in the housing of the machine.

The mechanism of the upper petlit the La 32 contains the Cam 33, mounted on the main shaft 15, which is pivotally connected with the rod 34, the slave lever 35 with the pin, a freely rotatable on the axis 36. The lever disc 37 through the opening therein has a kinematic connection with the pin of the slave arm 35. Lever-ROM 37 is made one with the hollow shaft 38. The hollow shaft 38 with the lever-disk 37 mounted on the axle 36 and is held in the sleeve of the vehicle body. On jutting out from the bushing end of the hollow shaft 38 is planted front lever 39 which is pivotally connected with the holder 40. The holder 40 passes through the connecting rod, pivotally mounted in the machine casing. In the tool holder 40 fixed upper petitely 32 and sericel 41. The hollow shaft 38 with the lever-disc 37 also has a curved groove, which includes the rod of the electromagnet 42. Lever-ROM 37 is preloaded by a spring 43 to the follower lever 35 with the pin. For fixing the upper looper 32 in the lowest position has rod 44 fixed in the housing, which falls into the hole in the lever-disk 37 at the time of actuation of the electromagnet 42 and the rotation of the slave arm 35 with the pin. Fixing the position of the upper looper 32 and its incorporation into the work takes place in quasi-static mode of operation of the machine when preparing her to work.

The looper mechanism 45 chain stitch has two nodes: transverse and longitudinal deviations. The cross-site variance looper 45 has kinematics the relationship with duplechin lever mechanism 29 of the lower looper through the lever shaft 46 47 mechanism. The second shoulder duplicera lever 29 includes an elongated axis, which may shift the hole of the lever 46. On the front end of the shaft 47 is fixed to the holder 48 looper 45. The node of the longitudinal variance looper 45 contains the Cam 49 mounted on the main shaft 15, the connecting rod 50, the lead 51, pivotally mounted on the shaft 46.

The mechanism of the presser foot 52 consists of a presser foot 52, secured to the rod 53, which is held in the sleeve casing and has mounted thereon a lead 54. On leash 54 presses the spring 55. On top of the spring 55 is movable sleeve 56, which interacts with the Cam 57 mounted on the shaft of the stepper motor 58. Lever-Cam 59 through lead 54 is lifting the presser foot 52 and through the machine control system disables the thread tension regulators 60, 61, 62, 63, 64 and 65 when lifting the presser foot 52. Movement of the rod 53 height recorded by the potentiometer 66, the sensor registering the height position presser foot 52. Regulation efforts compressing the material presser foot 52 may be due to the rotation of the shaft with the Cam 57 stepper motor 58 from commands received from the system control machine operation.

The mechanism of promotion material rails 67 and 68 contains nodes: longitudinal and vertical movement of the rails, regulation of stitch length, R is the regulation of differential and adjusting the position of the rails in height. The node of the longitudinal (horizontal) movement of the rails 67 and 68 consists of the eccentric promotion 69 mounted on the main shaft 15, the sleeve 70, the connecting rod 71, pivotally connected to the leading arm 72, promotion shaft 73, the levers 74 and 75, the connecting links 76 and 77, the lever arms 78 and 79, as well as rails 67 and 68.

Node vertical displacement of the rails 67 and 68 of the mechanism of promotion material consists of Cam 80, the sleeve 81, which is included in the guide grooves of the lever arms 78 and 79. The remote ends of the lever arms 78 and 79 are guides, into which are inserted the slides 82 and 83 located on the shaft with the knee 84, which is held in the sleeve in the body of the machine.

The control unit of the rails 67 and 68 in height contains the stepper motor 85 with the shaft and elbow 84. On the shaft with the knee 84 worn sliders 82 and 83, which are in the slots of the lever arms 78 and 79 of the mechanism of promotion material. The rotation of the stepper motor shaft 85 with a knee 84 leads to a change in height of the sliders 82 and 83, the rotation of the lever arms 78 and 79 and rails 67 and 68.

In the control unit of the stitch length has an axis 86 slide 87 attached to the front part of the rod 71, the connecting rod 88 is pivotally mounted in the machine casing and having a kinematic connection through duplici the lever 89 and the gear sector 90 with the toothed wheel 91 mounted on the shaft of the stepper motor 92. Stepper motor 92 is included in General the th control system of the machine.

The control unit differential in the mechanism of promotion material contains a stepper motor with the shaft 93 and the gear 94, rail-rail 95, pivotally connected with the link axis 96 and 97. On the axis 97 is the slider 98, held in the arcuate lever 75. Stepper motor 93 through the shaft and gear 94 shifts the rail-guide 95 and the slide 96 to the axis 97 and slide 98 in the arcuate groove of the lever 75. When the offset axis 97 slide 98 closer to or further from the axis of the shaft of promoting 73 changes its horizontal movement when the mechanism, and hence the value of the horizontal (longitudinal) movement of the additional rail 68. Stepper motor 93 is connected to the control system of the machine.

The mechanism for trimming the edges of the material with the upper movable knife 99 contains the Cam 100, the rod 101, duplici lever-fork 102, the axis 103 slide 104, the connecting link 105 and the holder 106 of the upper knife 99. To switch off from work (enable) upper knife 99, the machine is equipped electromagnet 107, which is on its stock has the connecting rod 108, which is the slider mechanism 104. The machine body has a curved groove 109, which may include the axis 103 disabling knife 99. Top blade 99 is preloaded by a spring 110 to the lower knife 111. The electromagnet 107 is included in the control system of the machine.

In the trimming mechanism edges mater the Ala site management of the width of the stitch consists of a shank 112 of the lower knife 111, fixed lower knife 111, an adjusting screw 113 in connection with the nut-sleeve 113 (2), gear pair II stepper motor 116. Driven gear 114 toothed gear has a ledge a passing in the longitudinal slot of the adjusting screw 113. The rotation of the driven gear 114 is transmitted through the protrusion d on it, adjusting screw 113. The adjusting screw 113 is engaged with the nut-sleeve a, mounted in the machine casing. Rotation of the adjusting screw 113 in the nut-sleeve d leads to a horizontal shift, and its end part of it affects the disc (protrusion a) axis of the tool holder 112 of the lower knife 111. On the axis of the tool holder 112 to eliminate its rotation has a transverse pin 1126 held in horizontal slots in the machine casing. The holder 112 has a finger 117 of the needle plate, which is displaced together with the stitch width control. Stepper motor 116 is connected to the control system and receives control commands.

The control system of the machine (Fig 3 and 4) contains the remote control 118, coupled to the processor and the control unit 119, which receives information from sensors of the rotation angle of the main shaft 120 (see Fig 1, 3), flow line 121, 122, 123, 124, 125 and 126, the height position 66 (potentiometer) presser foot, and is connected to the electromagnets thread tension 60, 61, 62, 63, 64 � 65, electromagnets 107 and 42 off of the upper movable knife 99 and the upper looper 32 accordingly, the stepper motor 58 regulatory efforts to pressure the presser foot, the stepper motor 85 regulation rails height, stepper motor 92 regulation of stitch length, stepper motor 93 regulation differential stepper motor 116 regulation of the width of the stitch. For a message of power to the electrical device from the electrical outlet installed in the car power supply 127. The machine has a built-in servo motor 128 which also receives commands through the control unit 119 from the remote control 118 of the machine. Remote control 118 contains the inputs and outputs for receiving information from external sources and transfer it to them. For manual withdrawal of the needle to the desired position, use the pulley 129.

The machine can be generated automatically configuring the technological adjustments: double-strand chain stitches (figa)containing the thread 130 of the needle 3A (Risa) and thread 131 looper 45; tehnicheskie stachelhaus-obmetochnye stitches (figb)containing the thread 132 of the needle 1, the thread 133 upper looper 32 and thread 134 of the lower looper 26; combined double-stranded stitches chain stitch (thread 130 of the needle 3A and thread 131 looper 45) and tehniceskogo overcasting stitch (pigv) thread 132 of the needle 1, line 133 upper looper 32 nor the coy 134 of the lower looper 26; tehnicheskie chain (for flat seams) stitches (Figg) with strings 130 needles 3A, line 131 looper 45 and thread 135 of the needle 3b (figb); tehnicheskie overcasting (figd)containing the needle thread 132 and thread 133 and 134 of the loopers; double-strand overcasting (fige) stitches, containing the thread 132 of the needle 1 and the thread 134 of the lower looper 26; combined double-stranded stitches chain stitch (thread 130 of the needle 3A and thread 131 looper 45) and tehniceskogo overcasting stitch (file)containing the needle thread 132 and thread 133 and 134 of the loopers; chetyrehstrochnye overcasting (Figg, figs, Figi, Figi and FIGC) with threads 132 of the needle 1 and needle 136 3, line 133 upper looper 32 and thread 134 of the lower looper 26; and two-legged varieties zigzag chain stitch (figa and 7b) with the threads 130 of the needle 3A and thread 131 looper 45 and zigzag overcasting stitch (figv and 7G) with threads 132 of the needle 1 and the thread 133 upper looper 32 and thread 134 of the lower looper 26.

Width bStperform two-legged zigzag stitch is limited to the maximum allowable offset bStneedles (regulation 3a and 3b on figb) in the formation tehniceskogo chain stitch 406 type. The needle in the formation of double-strand zigzag chain stitch 404 type (figa), obtains the deviation of the value of R404=0...bSt. The width of the run Technicon the (double-stranded) zigzag overcasting stitch b article ZKSlimited fixed minimum Δ1and the maximum Δ2with the distance between the needles in the formation chetyrehletnego overcasting stitch, which corresponds to the variance of RZKS1...Δ2(Figg) needles 1 (position 3 and 1 on figb) in total with width tehniceskogo (double-stranded) overcasting stitch bSTMP. The maximum value of zigzag stitches are also limited by the value of & Delta; b allowable displacement of the knife 111 is equal to & Delta; b=Δ21. When setting the stitch width is offset 0≤ & Delta; b(i)≤Knife & Delta; b 111 with a finger 117 of the needle plate to the desired value of the width of stitches:

for two-legged zigzag

barticle 404 max=0,...,R404,...bSt

for zigzag overcasting

barticle ZKS max=(bSTMP1),... (bSTMP+ & Delta; b(i)1),... (bSTMP2or

barticle ZKS max=bSTMP+RZKS,

where barticle 504 min- minimum width of the stitch 504 type.

Information-methodical maintenance of the machine (Fig) contains the following modules: information about materials 137, programs, 138 and modes of processing 139 and 140, methods and algorithms Troubleshooting 141, reference data on materials, products and programs and operations of their processing (142), the elements of smorgan the specialization in the work machine (training, themselves and others) (143); used additional devices 144, the diagnostic criteria for failure and information about faults 145, information about the device and the operating rules 146, informational data about defects in processing and ways of their elimination 147 and other information that can be transferred from an external source 148.

The sensors 121...126 to record flow Larticlethread 149 (Fig.9) used drive 150 with apertures 151, through which the beam of light from the led 152. The thread is dressed in thread guide 153 covering the drive pulley 154, which is made of a single disk 150 and rotates freely with the axis 155 of the bushings. After filling in the sensor check flow line she dressed in the regulator of its tension 156.

Overcasting machine operates as follows. When you power the machine on the remote control is information about the current state of the machine, the parameters of its settings, the absence of faults, the health of its electrical devices, etc. On the set and registered options materials 137 and the parameters of their processing 139, stepper motors of the machine and controls the thread tension is automatically set to the rational parameters of the machine. If necessary, change the operation parameters on the remote control selects the program of the work machine or adjusted some of its modes.

During the adjustment modes of operation or operations in preparation for its operation or during the operation on the remote control triggers the message, what action you want to perform or prove in some cases that these actions are performed (for example, changing the needle or its installation in the desired position). To disable the upper knife 99 and the upper looper 32 when performing machine double-strand chain stitch on the remote control is set to the desired program number and the machine includes electromagnets off 107 and 42 mechanisms and actuator 128 to commit one turnover (φ≤360°) in the quasistatic regime, during which disconnection occurs.

Before starting the machine signals to the sensors and stepper motors and verifies the data on the readiness of their work and their parameters setup, installed in the information-methodical support. When you are ready electrical devices to work correctly installed on the remote control 118 parameters taken by the operator warnings (if any) and the absence of other constraints, the machine begins operation.

With the appearance of swelling in a joint, tarticle>>t0articlewhere tarticle, t0articlethe thickness of the material under the presser foot 52, thefixer the bathrooms potentiometer 66 (with the passage of swelling in the joint and in the preceding moment, respectively), the servo motor 128 reduces the frequency of rotation of the main shaft 15. Change thickness stitch tarticleadjusting the position of the rails 67 and 68 in height due to the actuation of the stepper motor 85, the efforts of the pressure NP.L.presser foot 52 generated by the stepper motor 58 and the Cam 57. The magnitude of the lifting rails 67 and 68 and the efforts of the pressing NP.L.sets of reference data technological regimes 139 operations, or may be installed from the learning machine 140 for the operation.

When differences in the cost of line Larticleregistered sensors 120-125 from the accepted values from the database 139 or 140 is its correction due to changes in thread tension regulators thread tension TNR60...65 in the car. To increase the consumption of Larticlethe needle thread to reduce tension while maintaining or increasing the tension TNRthread the loopers, and to increase its flow - on the contrary: increase its tension while maintaining or decreasing the tension of the thread the loopers.

To increase the consumption of Larticlethread looper - reducing its tension TNRand increasing the tension of the other threads that are involved in the binding with it in the stitch. Database 139 or 140 on the value of the thread tension for each type of stitch and processed materials sohranjajut the in-memory machine. Can be worked out a new configuration of the machine 140, i.e. the learning machine to perform operations through the inclusion of a write operation of the new program processing products in the database 140.

In the formation of double-strand overcasting stitches (five) in the machine according to the remote control 118 program 138 is automated changeover of the machine and are included in the working mechanisms of the needle 1, the upper looper 32 (when installing the operator in the working position - Shiites 41), the lower looper 26, knives 99 and 111 (sets the width of the stitch barticlethrough the stepping motor 116 and engine tissue with the given parameters of the stitch length larticle, differential Δand the efforts of the pressing NP.L.through stepper motors 92, 93 and 58, respectively. Automatically through sensors 60 and 63 is used for setting the tension TNRthread the needle 1 and the looper 26, respectively.

When education trehsetovyh overcasting stitches (figb) in the car, set on the remote control 118 program changeover of the machine and are included in the working mechanisms of the needle 1, the upper looper 32, the lower looper 26, knives 99 and 111 and the moving rails 67 and 68. Sericel 41 must be in the off position (rightmost position).

To set the desired width overcasting stitch or position of the lower knife 111 relative to the needles is 1 turns on the control unit the position of the lower knife 111 with a finger 117 in the mechanism for trimming the edges of the material. Bottom knife 111 together with the holder 112 is shifted by turning the shaft of the stepper motor 116 from commands received from the system control machine operation. The rotation shaft of the stepper motor 116 transmits the rotation of the gear pair 114 and 115, in which the driven gear 114 having a ledge a, passes through the rotation of the adjusting screw 113. The adjusting screw 113, Wencelas in the nut-sleeve a, is shifted in the horizontal direction together with the holder 112 of the lower knife 111. Driven gear 114 with the tab a and the adjusting screw 113 is located on the axis of the tool holder 112, which is only horizontal displacement due to the presence of the shank 112 of the transverse pin b included in the horizontal groove in the body of the machine. Thus, upon actuation of the stepper motor 116, the rotation of the shaft through the transmission gear 114 and 115, the kinematic relationship of the protrusion of the gear 114 with the adjusting screw 113, the transmission of the adjusting screw 113 and the nut sleeve 11 3A is converted into a horizontal movement of the toolholder of the lower knife 111 and finger 117 of the needle plate at the required value & Delta; b(i).

To perform zigzag overcasting stitch is preset to the desired width overcasting stitch barticle ZKSby adjusting the position of the lower knife 111 with a finger 117 in the control unit Serenissima in mechanism for edge trimming of material for a given program. In the formation of zigzag overcasting stitch needle 1 receives the deviation at the left RZKSfrom the stepper motor 25 through a gear 23 and 24, the levers 22 and 21, the guide rail 18 of the frame 16 with the needle bar 4 by an amount equal to the distance between the needles Δ1(figa) or Δ2when performing chetyrehletnego overcasting stitch or by the amount Δ1+ & Delta; b(i)≤Δ2(figb). Thus, the control range of the knife 111 (figv and Figg) when performing zigzag overcasting stitch - Δ1≤RZKS≤Δ2. The total deviation RZKSneedle 1 may be greater, the greater offset & Delta; b(i)bottom knife 111 from the position of the run-504 type stitch with a minimum width of bSTMP.

When to perform each type of stitch, the machine gives a warning to the operator to conduct an audit of the Handbook 146, automatically checks the availability of the electrical and software and makes the first revolution in the quasistatic regime and health check: namely the absence of jamming or clogging. Malfunction of the machine (measured in methodical support 141 and 147) may occur if you incorrectly install the needle in the multi-needle holder (when it is ntact needle with the presser foot is suspended machine work), excess amount of lifting presser foot when lifting foot or by contact of the upper looper with the presser foot), the absence of a filling thread in the machine and other

When education chetyrehrjadnyh overcasting stitches (figs) in the car on the adopted program 138 is a readjustment of the machine and are included in the working mechanisms of the needle 1, the upper looper 32, the lower looper 26, knives 99 and 111 and engine tissue (rails 67 and 68 and the presser foot 52). Setting up the machine for a certain type chetyrehletnego overcasting stitch is primarily due to the installation of the required thread tension regulators 60-65. In the multi-needle holder 2 extra needle 3, which communicates with the lower melitele 26. The interaction of additional needle 3 with the upper melitele 32 different types of overcasting stitches optimum adjustment mechanisms of the machine and set the desired stitch width barticleand transverse displacement of the needle from the stepper motor 25.

In the formation of double-strand chain grinding stitch (figa), when setting program 138 of its execution on the remote control 118, the machine turns off from work mechanisms of the upper looper 32 and the upper knife 99, electromagnets 42 and 107, respectively. Off the top looper 32 and the upper knife 99 does which I for one single turnover of the main shaft 15 of the machine. The electromagnet 42 slips his rod lever-ROM 37 and when it is turned at the approach of the hole in the lever-disk 37 to the rod 44 is offset from the lever-disc 37 with the conclusion of the engagement of the pin on the slave lever 35 from the hole of the lever-ROM 37. Petitely 32 is fixed in its lowest position. Installing needle 3a (figa) for the formation of double-strand chain stitch to the needle holder 2 and is filling thread as the needle 3a and petitely 45. In the process of formation of chain stitches involved mechanisms needle, looper and engine tissue.

In the formation of various types of zigzag lines (figa and 7b), at a certain distance from the processed slice of material is initially offset from the stepper motor 116 through a gear lower knife 111 and part of the needle plate 117 by a specified amount. In the formation of zigzag double-strand chain stitch without cutting off the edges of the material comes off the upper movable knife 99 through actuation of the electromagnet 107. The maximum line width zigzag stitch bStmay correspond to the maximum stitch width barticle 406406 type.

In the process of formation of various types of double-strand zigzag lines stepper motor mechanism 25 needles reports through the wheel 24, the rack and the sector 23, the levers 22, 21 and the frame 18 of the needle with the needle holder 2 and the needle 3 a transverse deviation of R404in accordance with the form of lines (figa and figb).

When education tehniceskogo chain stitch (high) set needle 3A and 3b (pigv) in the needle holder 2 and is filling threads 130, 131 and 135 on the highway in the car. Petitely 32 and the upper knife 99 off from work. Needle 3A and 3b do not receive the transverse deviations.

When education is combined stitches (FIGU, 5e and g) install needle 3A and 1 in the needle holder 2 for the formation of double-strand chain and overcasting stitches, respectively, and is filling threads 130 and 132 in needle and thread 131, 133 and 134 loopers 45, 26 and 32. Machine, through the actuation of the solenoids 107 and 42, engages mechanisms of the upper knife 99 and the upper looper 32. In the formation of double-strand overcasting stitch line 133 of the upper looper is not filled, and the upper petitely 32 switches to sericel 41.

In the absence of consumption, Larticleline no rotation of the disk 150 flow sensors threads 120...125, which are tucked threads. When making two or three work rotations φ of the main shaft 15, according to the flow of the thread and the Rev counter 120, the servo motor 128 of the machine stops the rotation of the shaft 15 and the display 118 receives a signal about a possible breakage of the thread or the pass is tikov L article→0.

Also when more than three revolutions of the main shaft 15 (φ>1080°) and in the presence of the material under the presser foot 52 (Hl(i)>0) in case of discrepancy between the actual usage of thread Larticleadopted 140 or estimated 138Lcmpi.e.LcmLctp=f(bcm,tcm,lcm)is redistribution thread tension G regulators thread tension 60...65. The value of the thread tension TNRinstalled in accordance with TpNR(138) or established empirically (140) values of TpNRand stored in the database memory (140) of the machine.

When the contact needle 1 (3) or the upper looper 32 with the presser foot 52 running in slow mode, first turn (φ<360°) of the main shaft 15 of the machine at the beginning of its work is stop machines alarm about the presence of contact and ways of its elimination.

When changing the thickness of the material under the presser foot, a registered potentiometer 66, when the processHl(i)(figure 10), in comparison with the value in the preceding period Hlmore than the accepted permissible value ΔHSSmachine rebuilds value of the velocity V (with increasing thickness - reducing the frequency of rotation of the main shaft), the magnitude of the lifting slats hp- the magnitude of pressure the presser foot on the material N, respectively, by special dependenciesV=fv(Hl(i)),hp=fp(Hl(i))andN=fl(Hl(i)). Data dependencies into account not only the thickness of the material, but each is e physico-mechanical characteristics of the material, posted in information and methodical support of the process (Fig). The correction values is performed through the control system (figure 4) upon actuation of the actuator 128 and stepper motors 58 and 85.

When disturbances in the mechanisms of the diagnostic system machine matches the diagnostic criteria (software environment 141,143 and data 145 and 147), type of failure, or a mismatch between the parameters of the operating state of the device (144), or when the mismatch characteristics (145) - defect stitch or stitch (147). When testing the software of the machine can be used for the connection of external sources of information and their diagnosis through an external source, or reboot, or overwritten.

1. Overcasting sewing machine containing associated with installed on the main shaft eccentrics mechanisms: the needle with the nodes of the vertical and lateral deviations driven by a stepper motor, the upper and lower loopers, looper double-strand chain stitch, trim the edges of the material with the lower stationary knife and the upper movable knife, promotion material with stepper motors for regulating the stitch length and differential, presser foot and feed the thread into the machine control system containing stepper motors for regulating the length of the s stitch and regulation of differential and sensor recording the angle of rotation of the main shaft, connected to the processor, storage devices, and a control unit, characterized in that the mechanism for trimming the edges of the material with the lower stationary knife and the upper movable knife contains a control unit stitch width, containing a stepper motor with a gear pair, the adjusting screw and the nut-sleeve and the shank of the lower knife attached to finger the needle plate and in the mechanism of the needle, the cross-site variance, contains a stepper motor with gear gear, rack and pinion sector lever and the needle, with stepper motors mechanisms included in the integrated control system of the machine with information methodological support.

2. Machine according to claim 1, characterized in that the magnitude of the transverse deflection of the needle in the formation of zigzag overcasting stitch is in the interval of values from the minimum to the maximum distance between the needles in the formation chetyrehletnego overcasting stitch with the General positioning of the needle in the left position.

3. Machine according to claim 1, characterized in that the mechanism of the upper looper has a node shutdown, containing the electromagnet with the rod, a spring, a lever-drive on a hollow shaft looper located on the axis, the lever-disk has an arcuate groove for the passage of rod electroma the Nita and the other two holes in the lever-ROM are under the rod, fixed in the housing, and the pin of the slave lever mechanism looper, and the electromagnet node disable integrated into the overall control system of the machine.

4. Machine according to claim 1, characterized in that the mechanism for trimming the edges of the material with the lower stationary knife and the upper movable knife has a site off the top of the knife, containing the electromagnet with the connecting rod and the slider axis, a part of the groove duplicera lever-fork mechanism and cooperating with the guide in the housing, a connecting link and a spring holder top knife, while the electromagnet site off the top of the knife included in the control system of the machine.

5. Machine according to claim 1, characterized in that the mechanism of promotion material contains a control unit reek in height, consisting of a stepper motor with the shaft and the knee held in floaters, which are in the tail part of the lever arms of the rails, and stepper motor control unit reek included in the control system of the machine.

6. Machine according to claim 1, characterized in that the mechanism presser foot with a collar on the rod contacts the sensor registration provisions of the presser foot height, and the spring on the rod is movable sleeve in contact with the Cam mounted on the shaft of the stepper motor, and the sensor reg is the supervisor of the position of the presser foot height and stepper motor mechanism presser foot included in the control system of the machine, correcting the rotation angle of the shaft of the stepper motor mechanism presser foot and the angle of rotation of the stepper motor control unit reek height, the rotational speed of the main shaft of the machine from the shaft of the servo depending on sensor registration provisions of the presser foot height and mode of operation of the machine.

7. Machine according to claim 1, characterized in that the feeder thread contains sensors record flow line, pulley, drive with the holes and device for regulating the tension of the thread, when this sensor check flow threads and devices for the adjustment of thread tension included in a single control system of the machine.



 

Same patents:

FIELD: technological processes.

SUBSTANCE: device includes detector of displacement, which determines displacement of folding and controls actuation of sewing head. Therefore device function consists in synchronisation of stitch course generation by head with mutually controlled displacement of sewed material folding. It enables the user to displace folding in wide range of speeds, to start or stop displacement of folding as desired and to direct folding in any direction along flat bed.

EFFECT: possibility of free displacement of material layers folding on flat bed in relation to actuated sewing head.

30 cl, 16 dwg

The invention relates to a sewing equipment, in particular to the embroidery machine stitch, and can be used in embroidery machines when running stitches long length

The invention relates to a sewing technique, in particular to a device for installation of the working bodies in a certain position

The invention relates to a sewing equipment production and allows us to expand technological capabilities, improve technological and organizational flexibility sewing production system

FIELD: technological processes.

SUBSTANCE: device includes detector of displacement, which determines displacement of folding and controls actuation of sewing head. Therefore device function consists in synchronisation of stitch course generation by head with mutually controlled displacement of sewed material folding. It enables the user to displace folding in wide range of speeds, to start or stop displacement of folding as desired and to direct folding in any direction along flat bed.

EFFECT: possibility of free displacement of material layers folding on flat bed in relation to actuated sewing head.

30 cl, 16 dwg

FIELD: textiles, paper.

SUBSTANCE: machine has advanced technological capabilities with automatic changeover to different types of chain and overcasting stitches. For the first time, the overlock sewing machine performs zigzag stitches not only of two-thread chain stitch, but three-thread (two-thread) overcasting having less consumption of thread in comparison with the four-thread overcasting stitch. The machine additionally comprises the units of regulation of the width of the stitch and switching off the upper moving knife in the mechanism of cutting the edge of the material. In the upper looper mechanism the unit of its switching off is provided by actuation of the solenoid and opening the kinematic link between the driven lever and the shaft of the upper looper mechanism. In the mechanism of movement of the material the unit regulating the rods in height is mounted, actuated by the stepper motor. The presser foot mechanism comprises a sensor of registration of the presser foot position in height, and the stepper motor with a cam for regulation of the pressing force of the material by the presser foot. In the machine an automatic adjustment of the machine to the rational parameters of operation is provided, the self-learning methods are used due to which the diagnostic system has the ability of self-correction of the settings, when changing the conditions of the material processing.

EFFECT: machine has a single computerised control system of its operation, enabling to simplify its operation with the expansion of its technological capabilities.

7 cl, 10 dwg

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