Light shielding device


E06B9/324 -

 

(57) Abstract:

Usage: in construction and can be used for both full and partial overlap length of the aperture, for example, residential or public open space. The inventive device includes a supporting frame, obscuring element made in the form of a set of horizontal slats and bottom rail, surovy castle, made in the form of a head with a surface of rotation, the holding element with teeth placed on a portion of a circle and one shoulder lever mounted in the head of the swivel axis. The lever has a channel and a protrusion placed on the end of his shoulder. The structure of the device also includes and lift cords, the ends of which are derived from carrying boxes out through klinovuyu the gap formed by the surface of rotation of the head and teeth clamping element, and through the channel of the lever and the cord lock. The new device is a form of clamping element and one shoulder arm the mutual orientation of the clamping element and the lever. Thus, the clamping element with teeth made on one shoulder of the lever around the axis of rotation of the latter and with the eccentric arrangement of the teeth in relation to it. The channel at the ends of lifting the new castle. The axis of rotation of one shoulder of the lever is located above the longitudinal axis of the surface of the head rotation, and the axis of rotation of one shoulder of the lever and the longitudinal axis of the circumference of the positioning teeth clamping element is placed over the longitudinal axis of the rotation surface of the head at the start of these axes in the direction of withdrawal of the lifting cords from carrying boxes and cord lock to the outside. What is new is that in corded lock device introduced an additional one shoulder arm, clamped element with teeth, and the surface of the head rotation. The end of each of the lifting cords removed from bearing box and the cord lock to the outside through an individual klinovuyu slit. Proposed new mutual orientation of the bearing boxes and cord lock. It is made so that the forming surface of the head rotation and the axis (axes) of rotation of one shoulder arm and the cord lock are parallel to the side walls of the carrier box. 2 C. p. F.-ly, 11 ill.

The invention relates to the construction and can be used as a device for both full and partial overlap length of the aperture, for example, a window of a residential or public areas.

Known lighting device of sois these drums'd proceed around supporting flexible element, for example, strap, cord, etc., which is fixed to blackout plates (lamellae). They are located one after the other with the same distance between any two adjacent plates of the length equal to the height of the light aperture or exceed this height, the light shielding device is equipped with two tape, twisted in one direction by springs, one of which is made with thermo-mechanical shape memory. The spring is wound on the rotary axis. One end of each of them is mounted on a rotary axis, and the other is connected to the frame. On a rotary axis fixed another drum bearing thrust rotation of this axis together with all the attached parts. The above-mentioned drums with supporting flexible elements, the drum rods rotate and springs are not that other, as a mechanism of rotation of the plates, and set the last pay item. The device also has a lifting thrust, passed through the slots of all of the slats. One end of each link is connected with the drive mechanism of lifting blades, and the other mounted on the rail, placed the last plate in counting the slats on the rotary axis. Lifting thrust to the actuator and the bottom rail are maskoy mechanism is turning its slats [1]

The disadvantage of the complexity of the design due to the presence of springs with thermodynamic memory, and, consequently, the high cost of manufacture.

It is known device, which as a pay item is used blind [2]

Known plate curtain containing trough-shaped bearing box mounted in the upper part of the dimmable light aperture, a set of moving in the vertical direction horizontal slats, bottom rail, the mechanism of rotation of the slats in horizontal planes with manual transmission (flexible rods) and the mechanism for vertical movement of the slats bottom rail. The latter is in the form of two flexible lifting rods and rollers, on which the thrust laid. One ends of the rods withdrawn from carrying boxes out, passed through the slots of the slats in the area of their ends and secured to the bottom rail. The other ends of the rods withdrawn from carrying boxes out and they are put on a common handle. Lifting thrust simultaneously perform the role of a manual drive for the vertical movement of the slats and bottom rail. The considered design curtain is easy to manufacture, determined turn angle of the slats in horizontal planes [3]

Tannoy height, for example, when the position of the bottom rail in the middle part of fenestration, you must tie rod rise to any member that restricts the light aperture such as a window sill, wall, etc. that makes certain operational inconvenience.

There are also such lighting devices, the design of which allows to eliminate the aforementioned drawback. This is achieved by entering in the composition of the light shielding device or lever systems, locking lifting thrust, either due clamped rotating around its own longitudinal axis rotating bodies, such as pins, balls, gear rollers. A known design for locking cord blinds with improved locking device. By the end of the bearing box blinds attached supporting element and the cylinder, which has a device for locking the lifting cord. The retaining device is a dog, consisting of a system of two levers. The first long arm attached rotatably to the head, and the second short is attached rotatably to the first lever. The axis of rotation of the levers parallel to the side walls of the carrier box. The free ends of the levers have clips, which is ignee provides the ability to move the cord in both directions. However, at the bottom position of lever short lever having freedom of rotation, will still come into contact with the cord. Therefore, as when lifting the blackout element, and when lowering it between the clamp arm and the cord will cause the friction force, the magnitude of which is proportional to the preload force of the cord short arm to long. This fact is reinforced wear cord, reducing its service life. This is a disadvantage of the known device.

The known device with two mutually contacting shut-sections, U-shaped, pivotally mounted on an axis parallel to the side walls of the carrier box. Between these sections is omitted lifting cord [5]

But this design does not preclude the occurrence of friction between the cord and the terminals of the reference sections, and that is the drawback.

Known window shade device for fastening a cord, in which the cylinder stop lock is installed at one end of the bearing boxes. In the cylinder placed perpendicular to the side walls of the carrier box, the two pins. The first pin is stationary, and the second with the possibility of rotational movement around its own continue is that the angle between the vertical plane, passing through the axis of the fixed pin, and planes in the same location of the walls of the slots is a sharp peak below the fixed pin. One end of the slot is below the fixed pin and the other above it. Lifting cords derived from carrying boxes into the head, passed through the gap between the pins and released to the outside. When the deviation of the lifting cords in the direction opposite to the location of the curtains, the mass of the dimmable element pulls the lifting cords up (the curtain falls), pulling a rolling pin and pressing the lifting cords to a stationary pin, thereby further lowering of the darkening element is terminated and it is held in locked position. If you pull the lifting cords down and towards the location of the curtains, the movable pin moves down the inclined slots between pins and lifting cords a gap and cords will be released from clamping their efforts. Further tightening of the ends of the lifting cords down will cause the obscuring element climb up and open the light aperture. If the specified force to the lifting cords to remove the obscuring element begins to descend under its own m is Aty element with a movable ball, and in the upper part of the tubular element cartridge. Clamp lifting cord is between the ball and socket when the ball movement upward [7]

As can be seen from the description of the last two devices, the process of vertical displacements of the darkening elements between the lifting cords and locking their parts, a gap that eliminates the occurrence of harmful friction between them. This fact allows to reduce the wear of the lifting cords to increase their service life, which is the advantage of these devices. However, in some cases, for example when heavy and clock elements, the magnitude of the friction force arising between the lifting cords and locking parts are insufficient to hold the darkening elements in locked position. This leads to the disadvantage of the described structures.

Known automatic cable locking device having one toothed roller, which is introduced into the coupling with a gear rack, which provides reliability in providing rotational movement of the roller during its rectilinear displacements. This design provides reliable gripping the lifting cords (ropes) locking parts [8]

Known is, the hen is necessary to stop the movement of the check element. At this time, the movable toothed roller is in the lowest position and not in contact with the lifting cords. To make such contact is necessary lifting cords to divert the placement of the toothed roller, holding at the same time obscuring element. When this lifting cords partially gebaude around this movie, giving him the power pressure, causing the roller to move up and press the lifting cords to the other roller is smooth. After that, the forces of gravity on the mass of the darkening element, acting on the toothed roller through the lifting cords, raise this roller is even higher, due to what happens jamming. The force bias the toothed roller up the groove depends on the angle of coverage of this roller lifting cords. The greater the angle of coverage, the greater the lifting force. With a slight angle of coverage of the lifting force will be less than the frictional forces arising between the inclined surfaces of the face grooves of the head and the toothed roller. In this case, the toothed roller will not move up the slits. And at a high angle of coverage of the lifting cords have to deviate from the vertical in the direction of significant Hugo is iodide reject more than 1.5 m, that leads to a known operational inconvenience.

Known lighting device with rope lock, taken as a prototype of the invention. The device prototype consists of the trough-shaped bearing box, obscuring element made in the form of a set of slats and bottom rail, the lifting cords and lace lock. Lifting cords of this device before leaving the ends of the bearing boxes Abagnale on a stationary roller and passed through a gap formed between the said roller and a toothed roller supported by one shoulder lever, which is fixed on the axis with swing. Since one of the rollers is stationary, we can assume that its outer cylindrical surface is a surface of rotation of the head. On its end faces of the toothed roller is fixed in the inclined slots of the head with the possibility of rotational movement around its own longitudinal axis and straight along the walls of the slots. The cylinder is mounted inside the bearing boxes. The angle between the vertical plane passing through the center of the stationary roller, and planes in the same location of the walls of the slots of the head is a sharp peak above the axis C is ogene toothed roller, and an inclined plane that is parallel to the plane of arrangement of the eponymous walls of the slots of the head and tangent to the outer cylindrical surface of the toothed roller, between these planes will be formed wedge gap. The axis of rotation of one shoulder of the lever, the fixed and movable rollers perpendicular to the sides of the bearing boxes. Moreover, the axis of rotation of the lever is located below the longitudinal axis of the fixed roller and the axis is located at the reference in the direction of withdrawal of the lifting cords from carrying boxes and cord lock in the following sequence the axis of rotation of the lever longitudinal axis of the fixed roller longitudinal axis of the rolling roller. The combination of constituent elements, comprising a head with a surface of rotation (the outer cylindrical surface of the fixed roller), one shoulder arm with its axis of rotation and clamping element with teeth placed at least part of the cylinder (timing pulley) are corded castle. On the free lever arm made the protrusion supporting element in the lowest position, when the obscuring element is not locked. In the middle part of one shoulder arm made a channel (groove). The ends of the lifting cords you swetnam and the proposed device is each of them consists of the bearing box, obscuring element, the lifting cords and lace lock, made in the form of a head with a surface of rotation, one shoulder lever mounted in this cylinder rotatable on an axis, and a clamping element with teeth placed at least part of the cylinder. To the common characteristics is that both devices have the lever is made with the tab on the end of his shoulder and with the channel, and the ends of the lifting cords are derived from carrying boxes out through klinovuyu the gap formed by the surface of rotation of the head and teeth clamping element, and also through the channel of the lever and the cord lock.

By virtue of the known device is that the initial rise of the clamping element (even when not observed clamp lifting cords between the surface of the head rotation and clamped element) the force applied to the lifting cords and holding the obscuring element against downward movement, is not clamped on the item, and on one shoulder lever, which moves the clamped element along the slot. Therefore, in this case, there occurs friction between the clamped element and the walls of the slots from prilagaemyi only on the mass of this element. Therefore, the deflection angle of the lifting cords from the vertical plane of the device is lower than that of the prototype, which must be ensured during the operation of other similar known devices.

To identify the drawbacks of the prototype will look at it and the cord lock. In order to stop lifting cords, and, consequently, per item, must be attached to the ends of the lifting cords placed out, the force is directed down and to the side in a plane parallel to the side walls of the carrier box. Lifting cords, acting on the channel wall one shoulder lever is rotated around the axis of rotation. The lever moves the toothed roller on the slots of the head before contact with the lifting cords. Removing the force from the ends of the lifting cords, obscuring element under the action of its own weight tends to fall down and pulls the lifting cords. The toothed roller which presses these cords to the stationary roller starts turning around its own axis, to rise up even stronger clamping the lifting cords. Due to this and the locking of the lifting cords. At that moment, when the ends of the lifting cords will be withdrawn effort, one shoulder lever is thamnic cords. This is because the axis of rotation of the lever is located below the longitudinal axis of the fixed roller, and entered the following order of axes, measured in the direction of withdrawal of the lifting cords from carrying boxes and cord lock: axis of rotation of the lever longitudinal axis of the fixed roller longitudinal axis of the toothed roller. If the mass of the arm was used for additional preload lifting cords, the locking of these cords would be more reliable. This possibility known design does not provide that causes one of its shortcomings. As noted above, the toothed roller in its rectilinear movement of slides on the surface of the slots of the head, and at the moment of contact with the lifting rods and rotates around its own axis, also in contact with these surfaces of the slots. Friction surfaces wear, determining the length of service design. To increase the service life of the structure, which is very important for the consumer's head, the toothed roller and one shoulder arm has made of metal and not of injection molded plastics. This determines the high cost of manufacture of the known device, it is not enough Evista the prototype introduced a new and fairly complex element one shoulder lever, what makes it more complex than the above known devices analogues. A third disadvantage of the device prototype. It should be noted one more time. When manual control the vertical movement of the check element (this manual) it is possible that when the lifting cords shall be communicated to the movements. This will entail the unevenness of lifting (lowering) of edges per element. One edge will be above the other. In order to rectify the situation it would be advisable to pull one of the lifting cords, raising one edge of the darkening element on a level location to another, or to omit the last to the first, working with another cord. But for this you want to display both the plug from the clutch with a gear wheel, which is due to a known design, and after aligning the edges of the blackout element again to stop lifting cords that does not exclude the emergence of a second skew, etc. it would be much easier to manage known device, if the locking of each of the lifting cords was offline, which is not implemented in this device. This is the fourth disadvantage of known construction, although not very important. PR single clamping element for the two ends of the lifting cords. This deficiency determines the imperfection of the performance of the known device. And, finally, the offset ends of the lifting cords from the vertical plane in the management of the known device is in a plane parallel to the long sides of the bearing boxes. The offset of the lower parts of these ends can reach values exceeding 1.5 m In some cases, the space dimmable premises situated in front of a light opening, including in the area of location of the ends of the lifting cords is engaged in any subject or group of subjects, such as reading tables. Remains free only pass to lifting cords located in the vertical plane, in the direction perpendicular to the side walls of the carrier box. To manage the well-known device in this case will be uncomfortable, as installed in front of a light opening items will interfere with the offset ends of the lifting cords from the vertical plane. This situation is real. Her appearance causes the manifestation of yet another disadvantage of the known device. According to the authors of the proposed invention, under certain constructive measures mentioned disadvantages can be eliminated.

This objective is achieved in that in the known lighting device containing a supporting frame, obscuring element, lace lock, made in the form of a head with a surface of rotation, the holding element with teeth placed at least part of the cylinder, one shoulder and arm, mounted in a cylinder rotatable on an axis with the channel and placed on the end of his shoulder ledge, and lift cords, the ends of which are derived from carrying boxes out through klinovuyu the gap formed by the surface of rotation of the head and teeth clamping element and through the channel of the lever and the cord lock, differently performed the orientation of the clamping element toward the lever, and the channel under the ends of the lifting cords cut in another place of the lever. Proposed and other mutual arrangement of the longitudinal axes of the following elements: axis turning one shoulder arm, the longitudinal axis of the circumference of the positioning teeth of the clamping element and the longitudinal axis of the surface of rotation of the head. Thus, the clamping element with teeth made on one shoulder arm. He placed near the axis of rotation of the lever and with except klinovuyu the gap between the surface of the rotation of the head and teeth, what is necessary to ensure the operability of the device. The axis of rotation of the lever is proposed to be placed above the longitudinal axis of the surface of the head rotation and the axis of rotation of the lever and the longitudinal axis of the circumference of the positioning teeth clamping element is placed over the longitudinal axis of the rotation surface of the head at the start of these axes in the direction of withdrawal of the lifting cords from carrying boxes and cord lock to the outside. Thanks to the combination of these characteristics cannot turn the lever in the process of locking the lifting cords. The channel under the ends of the lifting cords in the slotted lever in the protrusion of the lever, in the location most remote from the axis of rotation of the latter, and not in its middle part, which is inherent in the known device. Pivoting the lever in this case it will be possible with less effort, which is attached to the lifting cords, deviated from the vertical plane, while maintaining the magnitude otkidyvayutsya torque equal to the torque value of the tilting lever of the known device. This statement is true under the condition of equality of the lever arms of both of the compared devices. In addition, the above novel features relating to someseni is some friction elements. These elements include mechanical trunnion clamping element, which is installed in the slotted heads of the known device, as well as slots. Due to this eliminated the harmful effects of friction on the work of the design that emerged in the known device by the mutual displacement of the rubbing parts: the pins of the clamping element and the walls of the slots of the head surfaces of the lever and clamping element.

The set of associated objective is achieved by the fact that in the known device, parts of which are already listed above, changed the number of one shoulder levers, clamping elements and the surfaces of rotation of the head. Corded castle of the proposed device is made with an additional one shoulder arm, clamped element and the surface of rotation of the head, and the end of each of the lifting cords removed from bearing box and the cord lock to the outside through an individual klinovuyu slit. Due to the introduction of these distinctive features is carried out individually locking the ends of the lifting cords.

Associated goal under particular conditions of operation of the known device mentioned above is achieved by the fact that it is made innosti head rotation and the axis of rotation of one shoulder arm of this castle are parallel to the side walls of the carrier box. Thanks to these characteristics is the ability to move the ends of the lifting cords in the management of the proposed device in the plane perpendicular to the side walls of the carrier box.

From the analysis of the existing technology, it follows that known in the art lighting devices have different types of pay items: curtains [2] or sets of rotatable in horizontal planes louvered plates [1] Most of these devices are composed carrying case or box, which houses the mechanisms of vertical travel blackout elements of the known devices are either without special lock, locking the lifting thrust, for example, cords per item [3] or so. The construction of locks are very diverse. But each of them contains in its composition of the body (head) and elements, clamping zastoporivalis, locking (lifting thrust). Thus, the known locking elements of the lever type. They include, for example, the retainer [4] and represent a system of two levers. One long fixed hinge axis of rotation on the head, and the other short attached rotatably to the first lever. Free to the E. of the known devices have the locking elements, made in the form of solids or surfaces of revolution. Device for securing cord [6] equipped with locking elements made in the form of two pins, one of which is stationary in the cylinder and is like her part, and the other with the possibility of rotational movement around its longitudinal axis and straight along the guide slots of the head. As the locking elements in the device [7] used a tubular workpiece Chuck and movable ball placed in this part. In some known devices, instead of the smooth locking elements in the form of a body of rotation, are toothed rollers [8] In some cases, shut-known designs lighting devices contain not only the locking elements, such as fixed and movable toothed rollers, but one shoulder and arm, driving the toothed roller (see, for example, the device-prototype).

Movable toothed roller of this device is mounted in the guide inclined slots of the head, his teeth are located throughout the outer cylindrical surface. One shoulder lever mounted in the head can rotate on the axis of rotation. The axis of rotation of the lever j is>o lifting cords from carrying boxes and cord lock in the following sequence: the axis of rotation of the lever longitudinal axis of the fixed roller longitudinal axis gear rolling roller. The axis of rotation of one shoulder arm, movable toothed roller and the fixed roller (surface of head rotation) parallel to each other and perpendicular to the side walls of the carrier box. Perpendicular to the side walls of the bearing boxes and

the longitudinal axis of the locking elements of other known devices [8, 6] for some devices the longitudinal axis of the locking elements are parallel to the side walls of the carrier box. Thus, the axis of rotation of the levers of the locking device [4,5] parallel to the side walls of the carrier box. In all these devices the ends of the lifting cords or rods drawn from carrying boxes and lace lock out, passed through klinovuyu slit formed locking elements, clamps, levers, levers, fixed and movable pins, a tubular element and a movable ball, a fixed pin and a movable toothed roller. Some of the known device is made with a movable locking element common to both the lifting cords [8, 5, 4] with two other movable who they are movable shut-off element.

However, among all known designs of lighting devices there is no such, which clamping element with teeth, which is part of the cord lock, would be performed on one shoulder arm. Because the specified characteristic is not yet known, there is no information about the location of the element on the lever, namely that it is placed near the axis of rotation of the lever and eccentric arrangement of the teeth relative to the axis of rotation. Does not exist and designs cord locks with the placement of the axis of rotation of one shoulder of the lever above the longitudinal axis of the stationary clamping element surface of the head rotation. There is also not such placement of parts in a known cord locks, when the axis of rotation of one shoulder of the lever and the longitudinal axis of the circumference of the positioning teeth of the movable clamping element would be off the longitudinal axis of the rotation surface of the head at the start of these axes in the direction of withdrawal of the lifting cords from carrying boxes and cord lock to the outside. The analysis of known structures using one shoulder

arm supporting the movable clamped element, also showed that there is no such lever, the channel under the ends of the lifting cor is the atur not given any information about the existence of the cord lock light shielding device, in which each of the output from carrying boxes and lock the ends of the lifting cords were halted individually their teeth, clamped element, its one shoulder arm and his surface of rotation of the head.

Known only to the device in which the locking unit is designed individually for each end of the lifting cords from the running gear and the stationary cylindrical (General) clamping elements without one shoulder arm. Specified entirety locking parts for each end of the lifting cords, consisting of one shoulder of the lever, a fixed clamping element (the surface of the rotating heads and movable toothed clamping element, no. The authors are not detected and information about such designs lighting devices that have a corded castle of the fixed and movable teeth, clamping elements, as well as one shoulder arm, in which the forming surface of the head rotation and the axis of rotation of one shoulder of the lever of the lock would be located parallel to the side walls of the box. Such arrangement is known only in devices that do not have one shoulder arm used in conjunction with the specified clamping elements. Scoop the OI literature. Since

these new distinctive features of the proposed technical solutions allow supplied by the authors object of the invention to improve the reliability of the locking of the lifting cords (hence, reliability of the light shielding device) while reducing the cost of manufacture, as well as simultaneously improving performance devices, it is possible to conclude that the improvement of the technical characteristics of the known device. This suggests that the proposed device is new and improved technical level compared with the characteristic of a device prototype.

In Fig.1 shows a longitudinal section along the plane of symmetry of the bearing boxes; Fig. 2 is a view along arrow a in Fig.1; Fig.3 cross-section B-B in Fig.1; Fig. 4 section b-b of Fig.1; Fig.5 the node I in Fig.1; Fig.6 section G-G in Fig. 1; Fig.7 section d-D in Fig.1; Fig.8 section e-E in Fig.1; Fig.9 section f-F in Fig.7; Fig.10 and 11 site II in Fig.2, options.

In the trough-shaped bearing box 1 (Fig.1 and 2) with side walls 2 and bottom 3 (Fig.3) mounted vertical movement mechanism, per item, made in the form of a set of slats 4 at least two supports 6. In the present case there are two such support. The number of poles depends on the width of the dimmable light aperture and mechanical characteristics

the material of the slats 4 and the bottom rail 5. Part of the vertical movement mechanism includes two flexible lifting cord 7 and 8, and two rollers 9 mounted swivel placed at the supports 6 axes 10. Corded castle made in the form of head 11 mounted on the end face of the bearing box 1 by means of the bracket 12 (see Fig.3), and one shoulder of the lever 13 (Fig.3 and 5) mounted rotatable on the axis 14. In the body of the head 11 has a groove 15 (Fig.5), which houses one shoulder arm 13, and the groove 16, the bottom of which is associated with a vertical groove wall surface 15 17 rotation with theoretical longitudinal axis 18. In the walls of the groove 16 are pressed pin 19 (see Fig.3 and 5). One shoulder lever 13 has a clamping element made in the form of several teeth 20 (see Fig.5) located on the circumference of 21. The teeth 20 are placed in the region where the axis 14 of rotation of the lever and eccentric with respect thereto. At the end of the lever arm 13 is a lug 22, which is cut by the channel 23. The longitudinal axis 14 of rotation of one shoulder of the lever, the axis 18 of the surface of rotation 17 and the axis of the circle 21 repoa vertical movement enshrined one of its ends on the holders 24 (see Fig.1) mounted in the socket,

located on the bottom of the bottom rail 5, is passed through the Central slots of all of the slats 4 and introduced into the internal cavity of the bearing boxes 1 through the groove in the bottom of the respective support 6. The free ends of the lifting cords Abagnale on its rollers 9 and introduced into the groove 16 (see Fig.5) head 11 and the cord lock into the space bounded by the bottom of the groove and the pin 19. Next they passed through klinovuyu the gap formed by the teeth 20 and the surface 17 of rotation, and removed from bearing box 1 and the cord lock to the outside through the channel 23 of the projection 22 of the lever 13. At the free ends of the lifting cords 7 and 8 fortified common handle 25 (see Fig.11). The mechanism of the reversal of the slats 4, comprises a worm gear and the rotary shaft 26, mounted on

the drums 27, which are arranged in bearings 6. Nests under the drums 27 (Fig.6) is executed in the vertical walls of the supports 6. Cross-section of the socket is a segment of a circle with a Central angle greater than 180aboutso that the width b of the neck of less diameter mating with the socket, the drum surface is 0.3 to 0.8 mm In the vertical wall of each support 6 cut a groove 28, which is removed from the socket so that the section 29 of the wall of cicalino down). His centering the lower ledge bearing 6 is installed in the groove on the bottom 3 of the bearing box 1 (see Fig.1 and 4). Spring strap 30 and the anchor strap 31 (see Fig.1, 4 and 6) fixed support 6 in a bearing box, preventing its displacement in the vertical direction. The worm gear has a housing 32 (Fig.7) with the groove 33 and bore 34, the worm wheel 35, coupled to the rotary shaft 26 and the worm 36 led out from the housing 32 of the gearbox and bearing boxes 1 through the hole in the bracket 37, which came in carrying a box through its side wall. The housing 32 of the gearbox and bracket 37 is fixed in the bearing box by means of brackets 38 (Fig.9). The same bracket 38 secures the worm 36 in the socket housing 32 against axial movement. On protruding from the bracket 37 (see Fig.4 and 7) out the end of the worm 36 is made a hole in which is inserted a hook (hook) manual drive mechanism of spread

slats 4. This drive is a profiled rod 39, for example a hexagon, with the said hook. At some distance from the ends of the bearing box 1 has two flexible ladder 40 (Fig.1 and 4), on the steps which laid the slats 4 (Fig.8) and the bottom rail 5. The upper ends of the uprights of these ladders is introduced into the internal cavity of the bearing boxes 1 through the grooves of the PoWPA the opposite side, Bogota on this surface and fixed thereto. The fastening is carried out by placing the unit, performed at the end of each rack. In the groove 42 of the drum 27. The free end of the bearing box is closed by a cover 43 (see Fig.1).

In Fig. 10 shows a variant of the proposed device. The head 11 and the cord lock in this case has two slots 16 and the two surfaces of rotation 17 (see Fig.5) with their longitudinal axes 18. In the head made two groove 15 (see Fig.5 and 10), each of which is placed on one shoulder one lever 13 with its clamping element. The levers 13 are mounted rotatable on a common axis 14. The free end of each of the lifting cords 7 and 8 are entered in their own individual groove 16 of the head 11 and the cord lock and passed through their individual klinovuyu the gap formed by the teeth 20 of his arm 13 and its surface 17 of rotation and removed from bearing box 1 and the cord lock to the outside through the channel 23 of the projection 22 of his arm 13.

In another case (Fig. 11) the head 11 is inserted in the bearing box 1 from its side wall 2 and fixed thereto by a bracket 12. Corded castle and in this case may be as to clamp both ends of the lifting cords between the locking element single one shoulder. 1 shows a case individually clamping each end of the lifting cords. The head 11 is installed in the support frame 1 so that the axis 14 of rotation of one shoulder of the lever 13, the longitudinal axis 18 of the surface 17 of head rotation and the longitudinal axis of the circumference 21 of the location of the teeth 20 parallel to the side walls 2 of the bearing box 1. The end face of the bearing box 1 in the cord lock is closed by a cover 43.

It is quite possible and this version of the proposed device, when instead of the above described mechanism of the reversal of the slats will be used by any other known mechanism for carrying out this turn. It is also possible that the obscuring element is designed as a collapsible into a roll of cloth or fabric, formed by a set of sequentially interconnected plates.

We offer light protection device operates as follows.

In the initial position, shown in Fig.1 and 8, the bottom rail 5 is in the lowest position, i.e. at the level of the lower edge dimmable light of the opening, or slightly below it. In this position they are held by the rungs of the ladder 40, as well as corded castle, in which the lifting cords 7 and 8, support lower ovci 11. In order to shift the obscuring element up and fix it on a new level, for example, in the upper end or intermediate position, you must make an effort to handle 25 (see Fig.1 and 5) acting in the plane of longitudinal symmetry of the bearing boxes 1 down and in the direction of the arrow M Lifting

the cords 7 and 8, putting pressure on the wall of the channel 23, deploy one shoulder lever in direction of arrow H until, when the teeth 20 will be released from contact with these cords and will cease to hold them, and, consequently, the obscuring element is in the locked position (see Fig.5 the contour of the lever in the tilted position shown in phantom lines). When the force on the handle 25, the current in a specified direction, will exceed the total value of gravity on the mass of the darkening element and the frictional forces in the system, the handle 25 will begin to move down, pulling out carrying boxes 1 and cord lock lift cords 7 and 8. The latter will be free to pass through klinovuyu slit the cord lock groove 16 of his head and leaning on the rollers 9, will inform them of the rotational movement in the direction of arrow P (see Fig.1). The lower ends of the lifting rods 7 and 8, mounted on holders 24, will go up, thus shifting up the bottom rail 5. On the first rail 5, fits on the rail and continues with her to shift upwards. Then the slats alternately one after the other, starting from the bottom, stacked one over the other, shifting up until then, until you add up the hill under the bottom bearing 3 boxes 1, completely freeing the light aperture. The direction of movement of the lifting cords 7 and 8 when lifting the blackout element indicated by the arrows R. If

the specified extreme upper position, per item, or if any of the intermediate positions, while maintaining the direction of action of the forces on the handle 25, to reduce it to a value less total magnitude of the force of gravity on the mass of the darkening element and the frictional forces in the system, then under the action of the gravity darkening element will begin to descend and occupy the lowest position. However, the amount of force on the handle 25 should be sufficient to hold one shoulder of the lever 13 in the tilted position. The direction of movement of the lifting cords 7 and 8 and the rotation of the rollers 9 will change to the opposite direction

the arrows P and P respectively. In order to fix the position of the check element at the correct height, you need to take the handle 25 in the vertical position without having to remove with no the tell on the channel wall 23 (see Fig.5) one shoulder of the lever 13, deployed this lever in the direction opposite to the direction of the arrow N. The teeth 20 of its clamping element will grip the lifting cords 7 and 8 to the surface of rotation 17 of the head 11 and will reliably hit a jam on them, thereby obscuring element and will be maintained at the specified level, then the force from the handle 25 can be removed. Stopping is due to the fact that gravity is caused by mass, per element and tending to displace the lifting cords 7 and 8 in a direction opposite to the direction of the arrow R, will seek to further expand one shoulder lever 13 in the direction opposite to the direction of the arrow H, thereby further increase the preload of the lifting cords 7 and 8 to the surface of rotation 17. Increase clamped efforts contributes one shoulder and arm 13, which under the action of its own weight tends to turn in the same direction jamming cords. To lower the obscuring element from the locked position, must be applied to the handle 25, the force directed vertically downwards and in direction of the arrow M, as already described when lifting the blackout element. The amount of force must exceed the total value of gravity on the mass of zalozenie and release the lift cords 7 and 8. While reducing stress on the handle 25 to a value sufficient to maintain the lever 13 in the tilted position, but less gravity on the mass of the darkening element, the latter will start to drop and will take extreme lower position or intermediate, if the lever 13 to return to its original position as indicated above. In order to cover fully or partially illuminated aperture at the lower initial position, per item or part of this opening when the intermediate position of the check element, it is necessary to operate the mechanism of the reversal of the slats 4 in horizontal planes. This should be made manually torque to the rod 39 (Fig.7) in either direction, for example, in the direction of the arrow and rotate the rod in the direction shown. Rotary

movement of the rod 39 through the toe will be transferred to the worm 36 and the worm gear and then the worm wheel 35 in the direction of the arrow So the Latter will inform the rotation of the rotary shaft 26. The axial force from the worm 36 will perceive themselves bracket 38. Together with the rotary shaft 26 will begin to unfold and drums 27 (see Fig. 1 and 8). In the process of turning the upper end of one of the poles of each flexible ladder 40, zakreplena. Due to this, one stands a flexible ladder is drawn into the bearing box 1 (moving up), and the other comes out of it (it goes down). This rise and fall and the corresponding ends of the stairs flexible ladders, turning around horizontal axes of the slats. Position when adjacent slats will touch each other, will correspond to the complete overlap of fenestration or part of it (this position is marked by the dash-dotted lines). When the rotary shaft 26 to rotate not to its extreme position, between adjacent slats 4 will be formed by the slit, which corresponds to the partial overlap of fenestration or part of it. In this case, the wall forming the slit will be directed downward when looking at the light shielding device of dimmable premises by the arrow U. If the direction of torque on the rod 39 is reversed, the direction of movement of the racks flexible ladders 40 will also reversed, as the worm 36 and worm

the wheel 35 and the rotary shaft 26 with the drums 27 changes the direction of its rotation. As you turn the rotary shaft 26 of the slats 4 will gradually return to the original neutral position palsas its other walls to the inner volume dimmable premises, and when the contact block light opening fully (this position is indicated by dashed lines). In case of partial overlap of fenestration wall slats 4, forming cracks will be directed according to the arrow f from the bottom up when you look at the shading element of dimmable premises. In the absence of control the reversal of the slats 4 of the torque rod 39, the slats will be held in the corresponding

a fixed position even if the slats or posts ladders will be accompanied by a random force. This is achieved by self-locking worm pairs in the direction of the worm wheel of the worm. During operation of the proposed lighting device of the rotary shaft 26, together with their drums 27 will be maintained in a horizontal position as the worm wheel 35 (see Fig.1), and racks 6 (see Fig.6), as the width of the neck of the nest under the boarding cylinder less matched with the diameter of the drum. As wear of the teeth 20 (Fig.5), the clamping element and the lifting cords 7 and 8 one shoulder lever 13 will accept a new starting position, in which the angle between the lever arm and the vertical is less than the original. Due to this, velicia device prototype. This is because only thanks to offer distinctive features related to the shape of one shoulder of the lever and presses the toothed element to the mutual orientation of the lever and this element, as well as to the relative positioning of the longitudinal axis of rotation of the elements of the cord lock, the said lever is connected to the process of locking the lifting cords. This increased the reliability of the locking of the lifting cords, and, consequently, the reliability of the entire device. As noted earlier, thanks to a new location

channel one shoulder arm reduced the magnitude of the pressure force of the lifting rod into the canal, which allowed us to reduce the magnitude of the friction forces that occur in these places. The latter fact provides increased reliability and durability. Previously also been shown evidence of reducing the number of friction elements. This makes it possible to avoid wear of the head, clamping element and the lever in those places offer devices that determine the durability of its operation. Elimination of wear in the important work places parts of the device increases durability. Povyshennyh qualities of the device. In addition, the above improvement of the operating conditions of the device (elimination of wear in the important work places details) opens the possibility of using injection molded plastics for the manufacture of these parts. Reducing the number of parts in the proposed device, simplifying the form of a lever which presses the toothed element, the head, and also enable the use of advanced materials for the manufacture of parts causes the increase of technological design and application of advanced technologies for the manufacturing of parts, and therefore, the reduction of production cost as compared to that of the known device.

The provision of opportunities for individual locking of the lifting cords allowed us to simplify the maintenance of the device during operation, which also indicates the improved performance of the proposed device. The same signs, aimed at achieving a self-locking lifting cords, helped to eliminate the effect of thickness variation of the lifting cords obtained during their production or due to wear and tear during operation, Nadirashvili from each other.

The signs described device relating to the new orientation and the cord lock relative to the bearing box (parallel to the longitudinal axes of the rotating parts of the castle and the side walls of the bearing boxes), helped to facilitate the maintenance of this device in private operating conditions described above. This also resulted in improved performance of the proposed device.

1. LIGHT shielding DEVICE containing a supporting frame, obscuring element, closely, lace lock, made in the form of a head with a surface of rotation, the holding element with teeth placed at least part of the cylinder, and installed in the cylinder can be rotated about the axis of rotation of one shoulder of the lever with the channel and placed on the end of his shoulder ledge, and lift cords, the ends of which are derived from carrying boxes out through klinovuyu the gap formed by the surface of rotation of the head and teeth clamping element, and through the channel of the lever and the cord lock, characterized in that that clamping element with teeth made on one shoulder the lever in place of the axis of rotation of the latter and with the eccentric arrangement of the teeth in relation to it, the channel at the ends pojemnosci head rotation, moreover, the axis of rotation of the lever and the longitudinal axis of the circumference of the positioning teeth clamping element is placed over the longitudinal axis of the rotation surface of the head at the start of these axes in the direction of withdrawal of the lifting cords from carrying boxes and cord lock to the outside.

2. The device according to p. 1, wherein the lace lock is made with an additional one shoulder arm, clamped element with the teeth and the surface of the head rotation and the end of each of the lifting cords removed from bearing box and the cord lock to the outside through the corresponding klinovuyu slit.

3. The device according to PP.1 and 2, characterized in that the bearing box and lace lock set so that the forming surface of the head rotation and the axis of rotation of one shoulder arm of this castle are parallel to the side walls of the carrier box.

 

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