SU918232A2 - Lift safety - Google Patents

Description

(54) CATCHER

The invention relates to the field of lifting and transport machinery, in particular, to automatically operating catchers, and can be used to hold a falling object, such as an elevator on a safety cable prk breakage of the cargo rope, as well as a safety (parachute) device to save life during operation mines Known catcher on auth. St. 734118, containing a clamping mechanism, including a housing, clamping pins covering a safety cable, a clamping spring-loaded sleeve with a latch, made in the form of a rotary lever, the clamping mechanism latch, made in the form of a ball interacting with a lever, a spring-loaded sleeve made with a ring shchetochka and the casing is made with a hole in which the said ball is installed, which interacts with the annular thread of the sleeve and the lever coaxially with which the fork carrying the cable is mounted, the free end of which It interacts with the object being repaired, the rotary lever being made with protrusions covering the fork of the rope, adjusting the lock BHiiTOM with the locknut. In addition, in the case at the entrance and at the exit of the safety cable are installed cylindrical rollers, and in the code-direction. Yusha in the form of a truncated cone. The safety device of this design does not ensure reliable preservation of the safety cable from damage when it is clamped at the gripping point by clamping balls, which are evenly spaced around the circumference in several rows along the length of the sleeve. The purpose of the invention is to reduce wear of the safety cable. For this hole, the clamping pins are placed one relative to the other along the forming liner by a distance of –b (0, 2 - 1.0) s −rp, where 3 YP (is the cable diameter in millimeters.

The drawing shows a general view of the catcher.

The safety device contains case 1, 2 and 2 with holes evenly spaced along the diameter and made offset from each other in several rows along the forming sleeve by distance - {(O, 2 - l, O) d-i-p. In the holes of the sleeve 2, clamping balls 3 are installed, covering the safety cable 4. The safety cable 4 is provided with a truncated cone guide 5. A spring 6 is installed between case 1 and sleeve 2. The latch ball 7 is initially installed in the opening 1 of the case 1 and contacts the annular groove of sleeve 2 and the cheek of the pivot arm 8. The pivot arm 8 is installed on the same axis 9 with a fork - 1O of the rope 11, zyaeegoe catchable object (not shown) with body 1 catcher.

The catcher works as follows:

The object, for example, during dynamic testing, moves along a linear trajectory along the safety cable 4 and accelerates ahead of the safety device, which lags behind the object due to the friction of the safety cable and mass inertia.

In the event of a break of the main cable, the object pulls the cable 12, which rotates the fork 1O around axis 9. Together with the fork 10 rotates around the axis

9 lever 8. Turning the lever 8 releases the ball 7. The sleeve 2 under the action of the spring 6 moves relative to the body 1 and carries the clamping balls 3, which fall on the conical surfaces of the body 1 and clamp the safety cable 4. In the distance

Due to inertial forces acting on the body 1 of the catcher from the mass of the object, the clamping balls 3 are finally jammed on the safety cable 4. The object to be caught hangs on the safety cable 4.

The offset of the clamping balls along the core of the sleeve reduces the contact voltages in the wire.

safety cable holders, due to a decrease in the lateral deformation of the safety cable in any cross section and. braking is carried out due to the transverse bending of the safety

the cable during its passage between displaced along the forming clamping balls. Such a constructive solution allows reducing the wear of the safety cable, increasing its service life,

which ultimately improves the performance of the catcher.

Claims (1)

1. USSR author's certificate N 734118, cl. B 66 B 5/16, 1977 (prototype).