Locking device for lift doors

Abstract

A door lock device for an upward-opening door includes: an engaging part, which is fixed on the landing door panel and moves up and down; and an engaging device, which can engage with the engaging part when the door is fully closed, and the engaging part has The latch portion, the engaging device has: a first link that swings by contacting the engaging member; and a second link that has a latch portion capable of engaging with the engaging member when the door is fully closed. The protruding part is rotatably supported by the first connecting rod through the second rotating shaft, and can swing relative to the first connecting rod, and the second connecting rod is provided with a first contact on one side across the second rotating shaft, and on the other A protruding portion is provided on the side, and the second link is configured so that, as a result of the synthesis of the swinging motion of the first link and the swinging motion of the second link, when the protruding portion engages with the latch portion of the engaging member in the fully closed state of the door, When engaged, the closing action of the electrical contact is performed between the first contact and the second contact. According to this configuration, since a sufficient separation distance can be obtained between the first contact and the second contact, even when the first contact and the second contact are stuck, they can be more reliably separated.

Description

technical field [0001] The invention relates to a door lock device for an upward opening door. Background technique [0002] In cargo elevators used for loading and unloading of cargo, overhead doors capable of securing an entrance and exit width approximately the same as the width of a passenger car have been widely used so far in order to improve workability at the entrance and exit. Top-hung doors, as the name suggests, refer to door devices that open and close along the up and down directions. [0003] Not limited to cargo elevators, but also general passenger elevators, door lock devices have been installed on landing doors. The door lock device is a device that locks when the passenger car does not stop at the hall corresponding to the target hall door so that the target hall door cannot be opened by external force. In addition, the door lock device can open and close the target hall door by unlocking the lock function. [0004] In the conventional door lock device ...

AI Technical Summary

Problems solved by technology

[0005] However, since the door lock device is equivalent to one of the elevator safety devices, it is required to ensure higher safety, for example, it is necessary to solve the problem of the above-mentioned electrical contact sticking

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