Turn-over opening/closing device for hanging-hole cover plate

Abstract

The invention relates to improvement of a turn-over opening/closing device for a hanging-hole cover plate. In the invention, the assisted opening device for a turn-over cover plate adopts a plurality of torsion springs; and frameworks or hanging-hole walls on two axial rotation ends of the cover plate are equipped with revolving chains and door leaf turn-over movement guide rails, and the door leaf at the outermost side of the cover plate is connected with the revolving chains to be pulled. The turn-over opening/closing device has the beneficial effects that the torsion springs are combined with the revolving chains for assisted opening, which realizes simple opening structure and more stable opening/closing operation without adding occupied space, and maximally preserves effective space of a hanging hole, thus the device is more applicable to opening and closing the cover plate for multiple door leaves; the cover plate can be manually opened/closed and can be also opened/closed in a power-driven manner, and the cover plate can be firstly transformed by a component as required; and the assisted opening device is of a fully mechanical structure without damage, and has high service reliability and less maintenance workload.

Description

technical field [0001] The invention is an improvement to the overturning opening / closing device of the hanging object hole cover, and particularly relates to an opening and closing mechanism which occupies a small space, has a simple structure, and is labor-saving, convenient and stable in opening and closing the cover. On / off device. Background technique [0002] Chinese patents CN2499465, CN201099937, CN201209277, etc. disclose the opening booster device for the movable cover plate of the hanging object hole of the hoisting equipment between the upper and lower floors of the building, which provides different ways to easily open the load-bearing cover plate of the hanging object hole, although they all have better power assistance. Turn on the effect. However, they still have some deficiencies. For example, the space occupation (width) of the power-assisted opening device itself is relatively large. The use area of ​​the actual hanging object in the hole is reduced; sec...

AI Technical Summary

Problems solved by technology

The hinged multi-leaf door not only greatly increases the opening/closing force, which makes it difficult to open, but also the cover plate rotates between 90 degrees, objectively there is a turning dead point, especially for multi-leaf hinges. In order to obtain as much hanging space as possible, the auxiliary The door panel is basically vertical when it is opened and retracted, not only the resistance at the dead point of the vertical line becomes larger when it is closed; but also if the opening support is not good, the lower end of the auxiliary door...

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