RU2452537C2 - Device for gravity chute of people - Google Patents

Abstract

FIELD: life saving equipment.

SUBSTANCE: invention relates to a device for transporting people from buildings in case of fire and for their salvation in mine opening. The device comprises a housing, a flexible load-carrier made in the form of a flexible steel tape placed on the drum. In the housing the pins are located between which the load-carrier moves, as well as a rail with rods allowing to adjust the speed of descent of load by weight, on which the openings for the carbine mounting corresponding to weight of load are made, and the carbine is coupled with the load, and the hand brake for braking additional weight.

EFFECT: device provides a constant moving speed and high safety.

3 cl, 2 dwg

Description

A device for transporting people under the action of gravity refers to means for saving people during their self-evacuation in case of fires or descent of working high-altitude workers.

Known devices for a similar purpose [1, 2, 3].

The prototype of the claimed device is the design described in patent 6 A62B 1/14, No. 2129890 (13) C1.

The above devices have a significant drawback: the speed of descent of a cargo of mass m is not stable, i.e. increases with increasing load. For this reason, the devices mentioned did not find practical application.

The aim of the invention is to develop a device in which the speed of lowering a load of mass m is constant.

The claimed device is intended for lowering people from a height at a predetermined speed, for example, during a fire or mountain rescue operations.

The design of the proposed device for transporting people or cargo under the action of gravity and the principle of its action are shown in figure 1 and figure 2.

The device consists of a housing 1, a drum 2, on which a heat-treated steel tape 3 (steel wire rope), vertical (inclined) hairpins 4, horizontal hairpins 5, 6, support 7, rods 8, control rails 9, a rope holding the load 10 are wound holes on the rail 11, the hand brake 12, the handle for rewinding the tape (rope) 13.

The proposed device operates as follows.

Under the action of gravity, equal to the mass multiplied by the acceleration of gravity, the tape (rope) 3, passing between the vertical studs 4 and horizontal 5, 6, is wound from the drum 2. The studs 4, 6 are stationary. Studs 5 under the action of gravity of the load have the ability to move vertically (for example, down), which leads to an increase in the angle of coupling between them and the carrier (tape, rope), and therefore to an increase in friction.

The studs 5 are connected by rods 8 with a control rail 9, one end of which is fixed to the housing (support 7).

On the rail 9, through segments of a certain length, holes 11 are made in which a carbine is mounted connected to the load.

Connecting the load with various holes (on the rail), you can adjust the amount of movement of the horizontal rods (due to the redistribution of forces between the support 7 and the rods 8), which will allow you to adjust the speed of descent of the load with different weight.

On the rail 9, opposite the holes, the masses of laden loads are applied.

Braking during the descent of people (cargo) is due to:

- friction forces between the fixed studs and the elastic tape (rope);

- friction forces between the studs moving vertically and the tape (rope), which depends on the mass of the transported load;

- redistribution of the load between the support 7 and the rods 8:

The number of movable horizontal rods 5 and rods 8 is determined experimentally and depends on the elasticity of the tape (rope), its width and thickness.

The carabiner from the cargo is connected to the hole on the rail 9, on which a mass less than the mass of the transported cargo is marked.

The additional mass of the load is braked by the hand brake 12.

The presented braking system during the descent of people provides a constant speed of movement and its high safety.

The proposed device is structurally simple, therefore, its manufacturing cost will be low, which will ensure its widespread use when lowering people from buildings and in mine workings.

Literature

1. Terebnev V.V. Fire drill / V.V. Terebnev [et al.]. - M.: GSP Academy, 2004 .-- 336 p.

2. Manual on fire drill. - Yaroslavl, 1973. - P.101.

3. Patent of Russia, 6 А62В 1/14 No. 2199890 (13) С1. Publ. 05/10/1999.

Claims (3)

1. Device for the gravitational descent of people, comprising a housing, a flexible load carrier, made in the form of an elastic steel tape placed on a drum, characterized in that there are studs in the body between which the carrier moves, a rail with rods that allows you to adjust the speed of lowering the load by weight on which holes corresponding to the mass of loads are made for mounting a carbine connected to the load, and a hand brake for braking the additional mass. 2. The device for the gravitational descent of people according to claim 1, characterized in that part of the studs has the ability to move vertically down under the action of the load. 3. The device for the gravitational descent of people according to claim 1, characterized in that the vertically movable studs are connected by rods with a rail, which allows you to adjust the speed of the descent of the load by mass.

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