SU1620696A1 - Device for safeguarding persons working in elevated places - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to construction, namely to devices for insuring at height. The purpose of the invention is to increase the safety of operation by providing automatic control of the stiffness of the end posts depending on the applied load. The end posts are made in the plane of the fence with a stiffness less than in the perpendicular direction, and are installed with the possibility of rotation around the longitudinal axis 2 or

Description

The invention relates to the construction, namely to devices for insurance when working at height, for example, when building structures.

The purpose of the invention is to increase the safety of operation by providing automatic control of the stiffness of the end posts depending on the applied load.

FIG. 1 shows a device for insurance when working at a height in the usual position (left) and when hanging on the installer's safety rope (right); FIG. 2 - section aa in fig 1.

The device contains rigid intermediate posts 1 with holes 2 and elastic end posts 3 with swivel caps 4, a safety rope 5 passed through holes 2 and fixed on the swivel heads 4 with tension screws 6. Each end stand 3 has an asymmetrical cross section form (elliptical, triangular, etc.) and installed in the support glass 7 with the possibility of rotation around the vertical axis. At the bottom of the end rack 3 is equipped with

a sector pulley 8. A pull 9 attach one end to the swivel head 4, and the other end is transferred through a block 10 installed near the end post 3, laid into the slot of the sector pulley 8 and fixed on it with a yoke 11.

The device works as follows

In the initial state, the end posts 3 are set so that in the plane defined by the intermediate stands 1, they have a minimum rigidity, i.e. the moment of resistance of the cross section of the end posts 3 relative to the perpendicular to the specified plane should be the smallest. When hanging on the safety rope 5 of one installer, the elastic deformation of the end posts 3 reduces shock impact on the installer and the device elements. In the case of the last fall of the second installer, due to the increased load on the safety rope 5, the deflection of the end posts 3 increases, the straps 9 turn the sector pulleys 8 around the vertical axis, and with them the end posts 3 also

with

oh to

about

CD

with about

their stiffness and a decrease in the increment of their deflection and, consequently, the increment of rope sagging 5 with an increase in the applied load. After removal of the load, the return spring 12 rotates the end post 3 around the longitudinal axis to the initial position, determined by the stop 13.

Claims (1)

Invention Formula An apparatus for working at heights, including rigid intermediate posts and end posts made of an elastic material with openings through which the safety rope with tensioning elements at the ends and a device for adjusting the rigidity of the end posts are passed, in order to increase safety operation by providing automatic adjustment of the stiffness of the end posts as a function of the applied load, the end posts made in the plane of the fence with a stiffness less than in the perpendicular direction, while they are equipped with a rotating tip in the upper part, and a return pulley with a return pulley in the lower part a spring, the head and the pulley are connected to each other by means of a flexible rod passed through a block installed at the end of the rack, while the rack is rigidly fixed in the sector pulley and is installed to rotate around the longitudinal axis, and the return spring is connected to the second end with the axis of the block. 12