Door lock device for upward opening door

Abstract

The invention comprises an engagement member that is fixed to a landing door panel and that moves vertically, and an engagement device that can engage with the engagement member while the door is in afully closed state. The engagement member has a latch. The engagement device has a first link that swings by contacting the engagement member, and a second link that has a projection able to engage with the latch of the engagement member while the door is in a fully closed state and that is able to swing with respect to the first link by being rotationally supported by the first link on a secondaxis of rotation. The second link is further provided with a first contact point on one side and the projection on the other side so that the second axis of rotation is therebetween. As a result of combining the swinging motion of the first link and the swinging motion of the second link, the projection is configured so as to close the electrical contact between the first contact point and a second contact point when engaged with the latch of the engagement member while in a fully closed state. According to this configuration, because a sufficient separation distance can be obtained between the first contact point and the second contact point, the contact points can be reliably separated even if the first contact point adheres to the second contact point.

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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