Device for gravitational chuting people and cargoes

FIELD: transport.

SUBSTANCE: invention relates to devices for chuting people and cargo under action of gravity, in particular to life saving equipment for self-evacuation during fires and for descending mountain-rescue men and spidermen. Device for gravitational chuting people and cargoes includes body, flexible load carrier made as resilient steel band placed on drum, movable and immovable pins between which the load carrier is moved. According to the invention the device contains speed limiter located between two immovable pins and consisting of plank set on axis, right and left pins located on the plank at different sides from axis, rod with piston which rod is shifted down by left pin, spring squeezed by piston and bolt serving to adjust spring flexibility. To stabilise speed the device additionally contains a gear set transmitting rotation from drum to gear wheel interacting via balancer axis with pendulum and pendulum weight, herewith the balancer can also be of spring type.

EFFECT: improved safety of device for gravitational chuting people and cargoes at constant speed in automatic braking mode.

2 cl, 3 dwg

 

The invention relates to a device for lowering persons and cargo, under the action of gravitational forces, in particular to the means for the salvation of the citizens when sanomatalo at fires and descent rescuers and climbers.

Known devices of similar purpose for descent people and cargo, under the action of gravitational force, is described in reference [1, 2].

The analogue of the claimed device is a structure described in patent No. 2129890 [3]. The above device has a major drawback: the speed of lowering the mass m is not stable, i.e. it increases with increasing load. For this reason, these devices have not found practical application.

The closest technical solution of the present invention taken the device for gravitational descent of the people by the RF patent №2452537. Publ. 10.06.2012, bull. No. 16 - a prototype [4].

The disadvantage of the prototype is an additional brake, driven down by the man.

The task of the invention is to develop a device for gravitational descent of people and goods with a constant speed in the automatic braking.

Technically attainable result - improved security device for gravitational descent of people and goods with a constant speed in the automatic braking.

Ethodologies fact, in the device for gravitational descent of people and goods, comprising a housing, a flexible grotonover made in the form of elastic steel strap, placed on the drum, pins, between which the tape moves in the vertical plane are adjusting moving horizontally under the action of the screws studs.

In Fig.1 shows a General layout diagram of the device for gravitational descent of people and goods, in Fig.2 is a frontal section through the drum of Fig.3 is a view As in Fig.2.

Device for gravitational descent of people and goods consists of the drum 1 (Fig.1), fixed deviant studs 2, grotonover - steel heat belt 3, the stock of which is located on the drum, the casing 4, the screws 5, the pins moving in the horizontal plane 6, the pins moving in the vertical plane 7, the fixed axis 8, around which it rotates strap 9, the cylinder 10, the piston rod 11, a piston 12, a spring 13, a washer 14, the adjusting bolt 15, the handle for rotation of the drum 16 (Fig.2), the axle of the drum 17, a small gear 18, which transmits the rotation of the gear 19, sitting on the shaft 20, the shaft 21, which is fixed to the balancer 22, a gear wheel 23, the pendulum 24, the weight of the pendulum 25.

Device for gravitational descent of people and goods is as follows.

The potential energy of the lifted cargo Wnmass is th m to a height H equal to W=m*g*H, where g is the acceleration of free fall.

The kinetic energy of the falling body of mass m from a height H equal potential and must be repaid when you move the body down constant speed (not more than 1 m/s).

The proposed device, the potential (kinetic) energy of the reentry body of mass m is extinguished by moving and bending between the pins heat-treated steel tape (due to its elastic properties) three times.

Consider the first stage damping the speed of descent of the load mass m.

In Fig.1 shows in a vertical plane stationary pins 2 and located between the movable studs 6, which under the action of the screws 5 are able to move in the horizontal plane, allowing changing the force on the moving tape. Movable studs 6 on the ends have a flat surface which, when the movement of the slide in the slotted holes of the chassis (under the action of the screws 5). The number of screws 5 may be one or more and their number depends on the size of the tape (width and thickness), its elasticity, steel grade, heat treatment and so on

Each adjustable (adjustment) screw 5 has a dial that has information about the resistance movement of the tape in kg

The kinematic scheme of the second stage of regulation is shown in Fig.2.

On the axle shaft 17 of the drum 1 is set ø the stubble 18, transmitting the rotation of the gear 19 and through the shaft 20 of the gear 23 (Fig.3).

On the shaft 21 is mounted rocker 22 which, interacting with the toothed wheel 23 with a pendulum pendulum 24 and the load 25, provides the speed of descent of man (cargo) constant. Instead pendulum balancer applies balancer.

The third stage of the automatic regulation of the speed of descent of the load mass m is as follows (Fig.1). The left and right studs 7 are located on a strap 9, which is planted in the center on the axis 8.

The higher the value of the lander weight, the greater the height of the drops left by the pin 7, and because the left pin 7 is attached to a strap 9, which rotates about a fixed axis 8, the right pin 7, lifting the tape 3 is moved upward, thereby automatically created additional bending of the belt, and hence more intensive braking, which is proportional to the mass of the drop shipment.

The left pin 7, down, moves down the rod 11 with the piston 12, which compresses the spring 13. The magnitude of the compression spring 13 is adjusted by the bolt 15.

By means of the screws 5 and the bolt 15 is being used to configure the device (when assembling).

Automatic three-stage regulation of the speed of descent of man (cargo) provides sufficient security descent and high reliability of the device, which is extremely necessary odimo in extraordinary circumstances during the rescue operations.

LITERATURE

1. Thereview Century Century Fire-drill / centuries Thereview [and others]): Academy of SHGs. 2004. - 336 S.

2. Instruction on fire-drill. - Yaroslavl. 1973. - 101 S.

3. Patent of Russia IPC AV, 1/14 No. 2129890.

4. Patent of Russia IPC AV, 1/14 No. 2452537. Publ. 10.06.2012, bull. No. 16.

1. Device for gravitational descent of people and goods, comprising a housing, a flexible grotonover made in the form of elastic steel strap, placed on the drum, the movable and the fixed pins, between which moves grotonover, characterized in that it contains the speed limiter located between the two fixed pins and consisting of strips, planted on the axis, the left and right studs, located on the strip on opposite sides of the axis of the piston rod with the piston moving down the left pin, spring, compressed by the piston and bolt used to adjust the elasticity of the spring.

2. The device under item 1, characterized in that in order to stabilize the rate includes the additional set of gears that transmit the rotation of the drum gear, interacting through the axis of the balancer with a pendulum and a pendulum weight, this weight can also be a spring.



 

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