Automatic crawling ladder device used for coming in/out of elevator pit

Abstract

The invention provides an automatic crawling ladder device used for coming in / out of an elevator pit. The automatic crawling ladder device has an opened state and a closed state relative to an elevator wall. The automatic crawling ladder device comprises a crawling ladder body, a connecting mechanism and a locking device, and further comprises a pull rod, a spring A and a spring B, wherein the connecting mechanism is used for connecting the crawling ladder body with a well enclosure in a rotating mode, the locking device is used for locking the crawling ladder body in the closed state, the pull rod is connected with the crawling ladder body in a sliding mode, the spring A and the spring B are in a stretched state, the other end of the pull rod is connected to the wall enclosure in a rotating mode, the two ends of the spring A are fixed on the crawling ladder body and the wall enclosure respectively, and the two ends of the spring B are fixed on the pull rod and the wall enclosure respectively. Detector switches are installed at the two ends of the crawling ladder body and connected with a control mechanism of an elevator. The two detector switches are used for determining whether the crawling ladder body is completely opened or closed so as to guarantee the safe operation and stopping of the elevator. The automatic crawling ladder device is arranged below a base station hoistway door sill and can be folded and closely attached to the wall enclosure when the crawling ladder body is in a non-work state, and therefore spaces is saved; when the crawling ladder body is in the opened state, the automatic crawling ladder device can be stably fixed in a well.

Description

technical field [0001] The invention relates to a ladder climbing device, in particular to an automatic ladder climbing device for entering and exiting an elevator pit. Background technique [0002] The pit of the elevator shaft is equipped with components such as buffers, safety gears, and tensioning devices. In order to facilitate the installation of these components and future inspection and maintenance, in elevators that have no other passages for maintenance personnel to safely enter the elevator pit, it must be installed A ladder device that can facilitate maintenance personnel to enter and exit the pit. The pit climbing device is an essential part of the entire elevator system. [0003] In today's elevator industry, the space occupied by the elevator shaft is one of its major selling points. The smaller the building area occupied by the elevator with the same car area, the higher its cost performance is. The ordinary bottom pit climbing device is to pass a ladder thr...

AI Technical Summary

Problems solved by technology

[0003] In today's elevator industry, the space occupied by the elevator shaft is one of its major selling points. The smaller the building area occupied by the elevator with the same car area, the higher its cost performance is. The ordinary bottom pit climbing device is to pass a ladder through the expansion bolt Fixed on the side wall of the hoistway, it takes up a lot of space, and the ordinary pit ladder device is far away from the entrance of the hall, it is difficult for maintenance personnel to reach the ladder device, it is not easy for maintenance personnel to enter the pit, and it is prone to fall hazards

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