JPS6237483A - Lock device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is provided, for example, on a storage surface lid for temporarily storing small items, a door, etc., and after it is locked, it can be unlocked only from the inside of the room. The present invention relates to a locking device that uses a lock device.

2. Description of the Related Art Conventionally, in a lock device operated by a key, the locked device can be unlocked with a duplicate key.

Problems to be Solved by the Invention Therefore, if this duplicate key is lost, there is a problem that someone who finds the duplicate key will either use it illegally to unlock the door, or copy the duplicate key and use it illegally to commit theft. .

Means for Solving the Problem The purpose of the present invention is to eliminate such drawbacks.Once the lock is locked, even if it is a duplicate key, it cannot be unlocked, and the lock cannot be unlocked from the inside. To provide a locking device which prevents this from happening and allows a key to be used only for locking operations.

A ratchet mechanism that is only allowed to rotate in one direction is provided at the rear of the cylinder lock, and when the rotating plate fixed to the rear shaft of the cylinder lock is rotated by the operation of a key, , when this rotating plate is rotated 90 degrees i~, the lid body can be opened,
When the rotation plate is further rotated by 90 degrees, the L-shaped rotation prevention plate rotatably attached to the frame rotates, and one side of this rotation prevention plate comes into contact with the fixed piece and rotates. At the same time that the lock stops moving, the other side comes into contact with the rotating plate, preventing the rotating plate from rotating and making it impossible to rotate the key. This state is a locked state. If the child of the rotation prevention plate is manually pulled from the indoor side to return it to the unlocked position (Fig. 2), it becomes possible to lock the door again with the duplicate key.

Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 15 is a front view of storage box A, where 1 is the lid body and 2
is the frame of this lid 1. A cylinder lock 3 is provided at the top of the lid 1, and a hinge portion 4 is provided at the bottom, allowing the lid 1 to be opened and closed freely.

A fixing piece 11 and an L-shaped rotation prevention plate 5 that is rotatable and movable in the axial direction are provided on the frame body 2 side, and a cylinder lock 3 is provided on the lid body 1 side, and a cylinder lock 3 is provided on the rear side of the cylinder lock 3. A ratchet mechanism 6 that allows rotation only in the direction is provided, and a rotation plate 7 is fixed to the rear end shaft 3a of the cylinder lock 3.

The rear end shaft 3a of the cylinder lock 3 is located at the center of the rotating plate 7, reducing the rotation range of the key (not shown).

Further, in the ratchet mechanism 6, the pawl portion 8a of the locking pawl member 8, which is biased by the spring 8', engages and disengages from the ratchet plate 6a.
It can only be rotated counterclockwise. The support shaft 5' of the rotation prevention plate 5 is wound with a coil spring 9, and is always urged toward the side of the frame 2 (FIGS. 5 and 6).

FIG. 2 shows the state in which the lid body 1 is closed, and the key is inserted into the cylinder lock 3 and rotated 90 degrees counterclockwise (the third
With this rotation operation, the rotating plate 7 rotates, and the rotating plate 7 is removed from the frame 2, allowing the lid 1 to be opened (FIG. 3).

After opening the lid 1 and putting the baggage in, when the key is further rotated 90 degrees counterclockwise, the L-shaped rotation prevention plate 5 is also rotated further, and this rotation One end 5 of the blocking plate 5
a comes into contact with the fixed piece 11 of the frame 2, and the other end 5b of this rotation prevention plate 5 comes into contact with the side surface 7a of the rotation plate 7, so the rotation plate 7 cannot be rotated any further in the counterclockwise direction. I can't move.

This state is the locked state (Fig. 4).

To unlock the lock, a household member pulls the eldest child 10 by hand from the indoor side while resisting the rotation prevention plate 5 against the coil spring 9, and then the rotation prevention plate 5 and the rotation plate 7 are disengaged. t (Fig. 6), so if the rotation prevention plate 5 is reversed and returned to the unlocked position shown in Fig. 2, the next time the delivery person who has the duplicate key will be able to put the package into the storage tube A. The door can be locked (Figure 3).

Effects of the Invention The bar of the present invention can only be rotated in the locking direction as shown in (7), and cannot be unlocked with a duplicate key when (7) is locked. Even if a large number of people give the same key, they can only lock the door, so if it is installed on the lid of the storage tube, it is useful because even when family members are absent, they can receive their luggage. This has the following effects.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a front view of the storage cylinder, Fig. 2 is a rear view of the main part with the lid closed, and Fig. 3 is the main part with the lid openable. FIG. 4 is a rear view of the main part with the lid closed and locked, and FIGS. 5 and 6 are longitudinal sectional views of the main part. A... Storage tube, 1... Lid, 2... Frame, 3...
- Nlinda lock, - 1... Hinge part, 5... Rotation prevention plate, 6... Ratchet mechanism, 7... Rotating plate, 8...
Locking claw member, 11...fixing 11-0 Patent applicant: Kokusan Metal Industry Co., Ltd. Figure 1 Figure 3

Claims (1)

[Claims] A lid body is equipped with a ratchet mechanism that allows rotation in only one direction, a cylinder lock with this ratchet mechanism installed at the rear, and a rotating plate with the rear end shaft of the cylinder lock fixed at the center position. An L-shaped rotation prevention plate that is rotated by a rotation plate and is biased by a spring wound around a support shaft, and this rotation when this rotation prevention plate is rotated by the rotation plate to the locked position. A locking device comprising a frame side provided with a fixing piece for preventing rotation of a blocking plate, and characterized in that the locking device cannot be operated with a duplicate key unless an unlocking operation is performed from inside the room.