Tower crane hook anti-falling device

Abstract

The invention provides a tower crane hook anti-falling device. The device comprises an anti-falling single piece located between a variable-amplitude trolley and a hook in a tower crane and hanging rings arranged on two sides of the hook. The anti-falling single piece comprises a seat body, an elastic piece and a hook plate group, and the seat body is arranged on the variable-amplitude trolley andis located between the variable-amplitude trolley and the hook. The hook plate group comprises two groups of hook plates, the two groups of hook plates are rotatably arranged on the seat body and arelocated on two sides of the hook, and a hanger is arranged at one end, close to the hook, of each hook plate. The two ends of the elastic piece are connected with the hook plates and the seat body respectively, and the seat body is provided with a limiting device used for limiting a rotating angle of each hook plate. And the hanger, the hanging rings and the limiting device are cooperated to prevent the hook from falling. The hook can collide with the variable-amplitude trolley from different angles, and after collision, the hook can be hooked through the hanging rings and the hanger so thatfalling is prevented.

Description

technical field [0001] The invention relates to the technical field of tower cranes, in particular to an anti-falling device for a hook of a tower crane. Background technique [0002] When the tower crane is in the working state or in an accidental state, when the height limiter fails, the hook will collide with the abdomen of the luffing trolley under the traction of the steel rope. When the steel rope loses its stretching distance and the power continues to pull, the steel rope will At this time, due to the breakage of the steel rope, the hook and the weight will quickly fall from a high altitude to the bottom surface, and the consequences will be disastrous. [0003] The Chinese patent with the application number CN201520527766.5 discloses a kind of anti-falling device for lifting the hook to the top, but the device disclosed in the patent may not be able to achieve the purpose of protection at the actual construction site. Since one end of the steel rope is fixed at the...

AI Technical Summary

Problems solved by technology

[0004] The patent with the application number CN201520527766.5 only sets the mushroom head, and only two baffles are set on the abdomen of the luffing trolley. The mushroom head in the swing state cannot move vertically and cannot be inserted between the two baffles; at the same time, the application number is CN201520527766. 5's patent When one of the baffles fails, the other baffle will also lose its function

[0005] To sum up, the device disclosed by the patent application number CN201520527766.5 cannot achieve the purpose of protection if there is a slight deviation during use

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