RU1790947C - Safety device for overhead work - Google Patents

Abstract

SUMMARY OF THE INVENTION: the device comprises a housing with a drum with a flexible element housed therein and a brake mechanism, the brake mechanism being a two-bladed rotor with convex dihedral working surfaces, mounted on a drum shaft in a housing with wave-like inner walls filled with balls, and on the drum there is an annular n% s with a width equal to the diameter of a flexible element located therein spirally in a vertical plane and fixed at one end in the center of rotation of the drum . 1 s P. f-ly, 3 ill.

Description

The invention relates to personal safety equipment when working at heights.

A safety device is known that includes a housing with a drum with a flexible element placed in it, filled with an inertial mass, and a brake mechanism in the form of a rotor with blades for interacting with the inertial mass with wave-shaped protrusions made on the inner cylindrical part of the housing.

A disadvantage of such a device is the inconvenience of use due to the large weight and dimensions.

The aim of the invention is to increase the usability of the device by reducing its size.

This goal is achieved in that in a device containing a housing with a drum with a flexible element housed in it, filled with an inertial mass, and a brake mechanism in the form of a rotor with blades for interaction of the inertial mass with wave-like protrusions made on the inner cylindrical part of the housing, the rotor blade made with dihedral working surfaces convex in the direction of rotation, with radial protrusions and depressions on the inner end walls of the body, and cylinders on the inner surface eskoy generator - projections and depressions directed parallel to the axis of rotation.

In this case, the dihedral working surfaces of the rotor blades are located at an angle of 155-175 ° to one another.

In FIG. 1 is a side view of an insurance device for working at height; in FIG. 2 is a view along arrow A in FIG. 1; in FIG. 3 is a section BB in FIG. 2.

The device consists of a housing 1 with a cover 2, a drum 3 with a shaft 4, on which a two-bladed rotor 5 is fixed. On the drum 3, an annular p 6 is made, in which

ate

WITH

v | O O O 4 vj

a flexible element 7 is arranged spirally in a vertical plane, which is fixed in the center of rotation of the drum 3. On the inner walls of the housing 1 there are wave-shaped protrusions and depressions 8, and on the end walls there are radial protrusions and depressions 9. The space between the rotor blades 5 is filled with an inertial mass in the form balls 10. The free end of the flexible element 7 is equipped with a thimble 11 for fastening to the installer's pole, and is intended for securing a self-locking loop on a beam, cross-member or bracket of a mounted structure.

On the rotor 5 there are made faceted convex surfaces 13 convex towards the rotation, located at an angle of 155-175 ° to each other (a, respectively, 12.5 ° - 2.5 °). To fill the case with balls in the cover 2, an opening with a threaded plug 14 is provided, the drum 3 shaft is mounted in a sliding bearing 15 pressed into the cover 2. A flexible element 7 is fixed in the center of rotation of the drum 3 with a wedge clamp 16. A cover plate is provided for winding the excess length of the flexible element 7 17 connected to the drum by 3 screws 18.

The device operates as follows.

The working installer thimble 11 of the device fastens a carbine to his on su. Then hook 12 hooks a loop over any beam, cross member or bracket above the place of work. The excess length of the flexible member (rope) 7 is selected by rotating the cover 17 clockwise.

In the event of a sudden fall, the flexible element 7 is rewound from the drum 3, while the radius of the winding will decrease rapidly, since the flexible element 7 is located in an annular groove with a width equal to its diameter spirally in the vertical plane. The drum 3 begins to rotate and spins the two-bladed rotor 5, which with its convex working surfaces 13 moves the mass of balls 10, both in the direction of rotation and in the direction of the walls of the housing 1, made with wave-shaped protrusions and depressions 8 and radial protrusions and depressions 9.

In this case, the balls 10 makes a circular complex motion, which is facilitated by the convex dihedral working surfaces 13 located at an angle of 155-175 relative to each other.

As a result of the interaction of moving and stationary bodies, an effective braking torque develops on the shaft of the drum 3, which automatically increases with increasing speed of its rotation.

At the same time, there is a constant decrease in torque by

drum shaft. 3 due to reduced radius

winding the flexible element 7 when it is unwound. .

The interaction of these factors leads to a smooth decrease in the rate of fall to a complete stop at the moment

the end of the winding of the flexible member 7.

The invention will allow

increase safety at height and

reduce injuries in the fall.

Claims (2)

The formula of the shade 1. A device for insurance when working at height, a housing containing a drum with a flexible element placed in it, filled with an inertial mass and a brake mechanism in the form of a rotor with blades for interacting with an inertial mass with wave-shaped protrusions made on the inside a cylindrical part of the housing, characterized in that, in order to improve ease of use, the rotor blades are made with dihedral working surfaces convex towards the rotation of the rotor, moreover, on the inner end faces the casing tenks are made of radial protrusions and depressions, and on the inner surface of the cylindrical generatrix - protrusions and depressions, directed parallel to the axis of rotation. , 2. The device according to claim, characterized in that the dihedral working surfaces of the rotor blades are located at an angle of 155-175 ° to one another.