Special lifting appliance for loading and unloading square steel

Abstract

The invention discloses a special lifting appliance for loading and unloading square steel. The special lifting appliance comprises a fixed block and a movable clamping device, wherein movable arms are arranged at the left ends and the right ends of the front side and the rear side of the fixed block, fixed adjusting blocks are arranged at the upper ends of the outer walls of the first movable arms, lifting rod fixing blocks are arranged at the left corners and the right corners of the front side and the rear side of the fixed block, the lifting rod fixing blocks are connected to adjusting rods through lifting rods, a movable clamping device is arranged between fifth movable arms on the same side, and the top of the movable clamping device is connected to a fourth movable arm. According to the appliance, the adjusting rods match the fixed adjusting blocks, so that clamping by the movable clamping device is easily realized, the front and the rear of the fixed block are provided with movable arms, the lifting effect of the lifting appliance is improved, meanwhile, lifting stability is improved, the stress per unit area is reduced, damage to a coating on the surface of square steel during lifting is avoided, the fixing effect of the device on the square steel is improved, and the lifting appliance is more stable and safer to use.

Description

technical field [0001] The invention relates to a special spreader for loading and unloading square steel. Background technique [0002] Steel has good toughness and sturdiness. Most of the modern buildings use steel as the main support structure to improve the bearing capacity of the building and increase the service life of the building. [0003] The existing patent (notification number: CN107539875A) discloses a hanger for steel structural members with holes, including lifting lugs, a first hanging plate, a second hanging plate, a movable tongue and a pusher, and the middle part of the movable tongue passes through The hinged shaft is rotatably mounted on the lower section of the first suspension plate and the second suspension plate, the hinged shaft divides the movable tongue plate into a long plate section and a short plate section, and the pushing device includes a pushing plate and a handle. In the process of realizing the present invention, the inventor found that ...

AI Technical Summary

Problems solved by technology

In the process of realizing the present invention, the inventor found that at least the following problems in the prior art have not been resolved: 1. The hanger adopts a hard connection mode, which is easy to damage the steel surface coating in the process of lifting the steel, resulting in Corrosion of the steel structure; 2. The positioning effect of the device in the aperture of the steel structure is not ideal; 3. The contact surface between the device and the steel surface is small, and the stability is not high during the hoisting process

Images