SU369914A1 - CAPTURES FOR LIFTING SUPPORT - Google Patents

Description

one

The invention relates to the field of electrical installation and is intended for lifting to conical reinforced concrete and metal pillars of communication lines, power transmission lines, a contact network of electrified sections of railways, a lighting network of urban household, etc.

Known lifters for lifting onto supports, which consist of a step for legs, a roller-roller chain forming a loop that encloses a support fixed on a roller step, connected to a bevel gear that engages with another gear fixed on disk sprocket interacting with the free end of the chain.

However, such grippers do not discredit lifting onto supports with a wide range of diameters. In addition, the chain loop enclosing the support is located in the horizontal plane, i.e., perpendicular to the longitudinal axis of the support. This impairs the interaction of the loop with the support, especially under appropriate conditions (ice, snow and moisture), i.e. the chain loop slides down, which excludes the possibility of using known grippers in weather conditions, in which it is most often necessary to carry out lifting on supports during repair work, etc.

Known grippers are available for lifting onto poles with a diameter of 220 to 340 mm, so

How, based on the permissible dimensions, weight and compactness of the device, the disk sprocket of the grippers with its full rotation allows you to select no more than 120 mm of the chain. At present, the diameters of conical reinforced concrete and metal supports reach from 220 to 510 mm.

The purpose of the invention is to increase labor productivity.

This is achieved by the fact that the means for sampling the chain, having the maximum allowable diameter, is provided with a spiral crown on which teeth are cut, and the chain loop enclosing the support is angled to the longitudinal axis of the support, and the angle corresponds to the angle of elevation of the crown helix.

FIG. 1 shows the right grip - top view; in fig. 2 is a section along L-A in FIG. one; in fig. 3 is a view along arrow B in FIG. one; in fig. 4 - asterisk with a spiral crown; in fig. 5 is a view along arrow B in FIG. four.

The kit includes a pair of grippers (right and left). The grippers consist of a chain /, roller 2, step 3 for legs rigidly connected to axis 4, and a special bevel gear 5 also rigidly connected to roller 2. Gear 5 engages with another special bevel gear 6 freely rotating on axis 7 and rigidly connected to the means 8 for sampling a chain provided with a spiral crown 9, in which teeth are cut in the usual way. With the crown 9 is securely connected to one end of the chain. The other end of the chain is attached to the engagement 10, by means of which it can be quickly put on the pin 11, rigidly connected to the step for the feet, the finger being set relative to the step at an angle corresponding to the elevation angle of the helix of the sprocket. Such a co-structural design ensures reliable positioning of the chain loop at an angle to the longitudinal axis of the support, and this angle is equal to the elevation angle of the screw chain of the sprocket's sprocket. (with the support of the maximum diameter) or wind a part of the value on it (with the support of a smaller diameter), and attach the leg to the step with straps (not shown). Then the support is wrapped around the free end of the chain and the engagement 10 is put on the finger //.

When lifting with a foot movement, the worker presses the roller 2 of one of the grippers onto the support 12. Turning roller 2 through gears -5 and 5 Pivots the means to fetch the chain. As a result of this, the chain is wound on a spiral-shaped crown and, since the chain loop is angled to the longitudinal axis of the support, reliable gripping of the gripper on the support occurs. He transferred the weight of the body to the back of the Kliennennij zheagg, the worker, who repeats the same operation with the second seizure, thereby, as it were, tightening one: the leg to the other. In the work, on the support, the clamps are mustache; ta1N-a and B | Lyvats are in the same plane, which only means a stable and comfortable position, working.

Subject invention

Grips for lifting onto supports comprising a chain, steps rigidly connected to the axle, a bevel gear fixed to the roller, a bevel gear connected to the means for hauling the chain, and a pin rigidly connected to the step for the legs, distinguished from By the fact that, in order to increase labor productivity, the means for selecting a chain is made in the form of a spiral crown with teeth.

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