Locks for doors

Abstract

PROBLEM TO BE SOLVED: To surely prevent unlocking when someone tries to force a door of a locker open.

Description

technical field [0001] The present invention relates to a lock device for a door, which is a device for locking and unlocking a cabinet with a rotary door, such as a paid automatic storage box or a door-to-door cabinet; In particular, it relates to a door lock device that can be reliably unlocked even when a large cargo is placed in the cabinet and there is a back pressure on the door, and the act of forcibly unlocking the sled door enhances theft prevention High-performance door lock device. Background technique [0002] Figure 10 ~ Figure 12 Represents one form of a conventional door lock device (for example, refer to Japanese Patent No. 3443212, pages 3-4, Figure 7 ~Figure 8, Figure 11 ). [0003] The structure of this door lock device 51 is to be provided with: hang the hook 52 on the door side and lock the rotary locking plate 53; the locking plate 53 is bounced to the winding spring 54 of the unlocking direction; the locking plate 53 is prevented from unlocking. ...

AI Technical Summary

Problems solved by technology

[0008] However, in the above-mentioned prior door lock device 51, since the user of the cabinet puts large goods into the cabinet 69, the goods are locked in a state in which the door 72 is pushed from the inside of the cabinet to the opening direction (a state of applying back pressure). When locked, it will be as Figure 10 As shown, the hook 52 pushes the locking plate 53 along the unlocking direction (the direction of clockwise rotation), so that the locking plate 53 is tightly abutted against the stop arm 55, thereby preventing the rotation of the locking plate 53 and making the door 72 become a problem that cannot be opened

[0009] At this time, although the cabinet user shakes the door 72 back and forth and tries to open it (when the door 72 is pushed inwardly against the back pressure, the hook 52 rotates the locking plate 53 a little to the unlocking direction, and the locking plate is released. 53 and the stop arm 55), but since the unlocking operation force is transmitted to the stop arm 55 through the plunger 66 and the drive rod 56, the click between the plunger 66 and the drive rod 56 and the stop arm 55 There is a time lag in the driving of the stop arm 55 due to rattling, etc., so that the contact between the lock plate 53 and the stop arm 55 is difficult to be released, and there is a problem that the lock cannot be unlocked smoothly.

[0010] And, since the above-mentioned antitheft performance of the previous door lock device 51 depends on the strength of the lock plate 53 clamping (embracing) the hook 52 and the strength of the stop arm 55 fixing the hook 52 at the locked position, The anti-theft performance (making the strength not to be unlocked) is limited, and there will be such a problem, that is, when the thief slams the door of the cabinet to the opening direction with a tool such as a sled bar, the hook 52 of the door will forcibly make the door open. The locking plate 53 rotates to the unlocking direction to open the door

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