Self-locking door lock used for access door

Abstract

The invention discloses a self-locking door lock used for an access door. The self-locking door lock used for the access door comprises an upper lock base, a lower lock base, a rotating shaft and a spring bolt; the upper lock base and the lower lock base are connected in a sliding manner; the rotating shaft penetrates the upper lock base and the lower lock base in the longitudinal direction; one end of the rotating shaft is fixedly connected with an upper handle; the other end of the rotating shaft is fixedly connected with a lower handle; the spring bolt is perpendicularly fixed to the rotating shaft; the circumferential direction of the lower lock base is provided with a spring bolt sliding groove; the rotating shaft drives the spring bolt to rotate in the spring bolt sliding groove; anelastic locking device is arranged in the lower lock base; the upper end face of the spring bolt is provided with a limiting groove; and the spring bolt is locked after the elastic locking device andthe limiting groove are connected in a matched manner. The self-locking door lock is used for the access door, the elastic locking device is arranged in the lower lock base, the spring bolt is lockedafter the elastic locking device and the limiting groove in the spring bolt are connected in the matched manner, and therefore the situation that because of man-made carelessness or equipment vibration, the spring bolt slips on its own, and the access door is automatically opened can be avoided.

Description

technical field [0001] The invention belongs to the technical field of door lock manufacturing, and in particular relates to a self-locking door lock for an inspection door. Background technique [0002] A door lock is mainly used to lock the door, which is a device to prevent others from opening the door. At present, some non-container access doors usually use door locks to lock the doors. Door locks are mainly divided into two types with keys and without keys. The door lock with a key requires the maintenance personnel to wear the key every time they are overhauled. If the key is damaged or lost, the internal inspection of the equipment cannot be performed, and the key needs to be re-provided or the door lock needs to be replaced, which increases the cost and labor cost of the maintenance door; Because the door lock has no self-locking function, it is easy to cause the lock tongue to slip off by itself due to human inadvertence or equipment vibration, and the maintenance...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a self-locking door lock for an inspection door, which solves the technical problem in the prior art that the bolt in the door lock is easy to slip off by itself, resulting in the automatic opening of the inspection door

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