Large self-balancing type safe and labor-saving cover plate device

Abstract

The invention discloses a large self-balancing type safe and labor-saving cover plate device which is used for being arranged at a lifting opening of floor slabs, and a framework is arranged around the lifting opening. The large self-balancing type safe and labor-saving cover plate device comprises a pair of guide rails, multiple cover plates and a lifting device, wherein the guide rails are respectively arranged on two opposite sides of the lifting opening, one end of each of the pair of guide rails is connected with the framework in a pivoted mode, the multiple cover plates are movably supported on the pair of guide rails, and the cover plates have an unfolded state and a folded state. The lifting device is used for lifting and descending the other end of each of the pair of guide rails so that the multiple cover plates are enabled to be switched between the unfolded state and the folded state. According to the large self-balancing type safe and labor-saving cover plate device, through the change of the rotation angles of the guide rails relative to the framework, a purpose of adjusting the gravity centers of the cover plates is achieved, and therefore the heavy cover plates can be opened and closed through utilization of self weights of the cover plates without the need of any additional auxiliary devices, the manufacturing cost is lowered, the problem that long cover plates cannot be manufactured on the principle that the folded cover plates only rely on counterweight is solved, and the operation process is enabled to be simpler and more convenient.

Description

technical field [0001] The invention relates to a cover plate device arranged at a hoisting opening of a building floor. Background technique [0002] For the sake of safety, the hoisting opening on the building floor is usually provided with a cover plate and a safety guardrail. For the cover plate of common structure, the erected height of the cover plate is determined by the opening size of the hoisting port. When the opening is larger, the cover plate will be higher, and the equipment must be hoisted higher when hoisting the equipment. And under the situation that floor height is limited, the cover plate device of common structure can't be used for the hoisting opening that has bigger opening. In order to meet the hoisting height requirements of the large opening hoisting opening, people have designed a folding cover, but this folding cover still has the following disadvantages: [0003] 1. The existing folding cover must rely on its own counterweight to open and clos...

AI Technical Summary

Problems solved by technology

Therefore from this point of view, the existing folding cover plate cannot be made too large in principle;

[0004] 2. The existing folding cover must be opened by a special cover opening device, which is relatively complicated to operate, and there are potential safety hazards during the opening process of the cover;

[0005] 3. The existing folding cover can only rely on the strength of the cover itself to support the load, so it is not suitable for wider and longer lifting openings

Images