JPS6237484A - 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 Field of Application The present invention is provided, for example, on the lid or door of a nursery school where small items are temporarily stored, so that the lock can only be unlocked from inside the room after it has been locked. It concerns a locking device.

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

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

Means for Solving the Problems The object of the present invention, in order to eliminate this drawback, is to provide a locking device which, once locked, cannot be unlocked by this interlock and can only be locked.

A ratchet mechanism that only allows rotation in one direction is provided at the rear of the ring lock, and a rotating plate fixed to the rear shaft of the cylinder lock is rotated by the operation of a duplicate key. Then, when the rotating plate is rotated 90 degrees, the lid can be opened, and when the rotating plate is rotated 90 degrees after the lid is closed, the frame can be pivoted freely. The attached rotation prevention plate is rotated, and this rotation prevention plate comes into contact with the fixed piece and the rotation is blocked by 1". At the same time, the rotation prevention plate that is pressing this rotation prevention plate is rotated. It becomes impossible to rotate and the locked state is completed.

Furthermore, if the child of the rotation prevention plate is returned to the unlocked position (FIG. 2) while being picked up and pulled by hand, it becomes possible to lock the door again with a duplicate key.

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

FIG. 1 is a front view of the storage box A, where 1 is a lid and 2 is a 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, so that the lid 1 can be opened and closed.

A fixing piece 11 and a rotation preventing plate 5' which are rotatable and movable in the axial direction are provided on the frame body 2 side, and a cylinder lock 3 and a rear part of the cylinder lock 3 are provided on the lid body 1 side. A ratchet mechanism 6 that only allows movement is provided, and the rear end shaft 3 of this pull lock 3
The rotating plate 7 is fixed to a.

The rear end shaft 3a of the cylinder lock 3 is located at the center of the rotation plate 7, and the rotation range of the key (not shown) is reduced (~).The ratchet mechanism 6 also has a spring attached to the ratchet plate 6a. The claw portion 8a of the locking claw member 8, which is biased by 8', engages and disengages, and can rotate only in the counterclockwise direction.

Further, the support shaft 5' of the rotation prevention plate 5 is wound around a coil spring 9, and is constantly biased toward the frame body 2 by a force 5 (5th
(Figs. 6 to 6).

FIG. 2 shows a state in which the lid body 1 is closed, and the key is inserted into the cylinder lock 3 and can be 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, put the baggage in, and after closing the lid 1,
When the key is further rotated 90 degrees counterclockwise, the rotation prevention plate 5 is also rotated further, and this rotation prevention plate 5 comes into contact with the fixed piece 11, and the rotation prevention plate 5 also rotates. Since it comes into contact with the side surface 7a of the plate 7, the rotating plate 7 cannot be rotated any further, and unless the locked state is completed and the lock is unlocked from inside the room, the locking operation cannot be performed again with a duplicate key.

When unlocking, a householder pulls the eldest child 10 by hand while resisting the rotation prevention plate 5 against the coil spring 9 from the indoor side, and the stop between the rotation prevention plate 5 and the rotation plate 7 is removed. (Fig. 6), turn the rotation prevention plate 5 again and return it to the unlocked position shown in Fig. 2. Locking operation becomes possible (Figure 3).

Effects of the Invention As described above, the present invention can only be rotated in the locking direction, and in the locked state (/'C), it is not possible to unlock the door with a duplicate key, so it is difficult for the person delivering the package, etc. Even if you give the same key to many people, you can only lock the door.
If provided on the lid of the storage box, it will be possible to receive the luggage even when the family member is away, resulting in a useful effect.

[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 box, 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. Rear view, FIG. 4 - A rear view of the main part with the hinge body closed and locked, and FIGS. 5 and 6 are longitudinal sectional views of the main part. A...Storage box, 1.Lid, 2...Frame, 3...Cylinder lock, 5...Rotation prevention plate, 6...Radiet mechanism,
7... Rotating plate, 8... Locking claw member. ! Patent applicant: Kokusan Kinm Kogyo Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A lid body 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 fixed with the rear end shaft of the cylinder lock in the center position, and the lid side The rotation prevention plate is rotated by the rotation plate and is biased by a spring wound around the support shaft, and when the rotation prevention plate is rotated to the locked position by the rotation plate, A locking device comprising a frame side provided with a fixing piece for preventing rotation, and characterized in that it cannot be operated with a duplicate key unless an unlocking operation is performed from inside the room.