JP6980340B2 - Lock structure - Google Patents

Description

The present invention relates to a locking structure used in a cabinet.

As described in Patent Document 1, it is widely practiced to provide a locking structure in a cabinet. By locking the lock structure, it is possible to prevent the door from opening even if the handle provided on the door is operated.

Japanese Unexamined Patent Publication No. 2017-043977

By the way, it was difficult to unlock the cabinet when the lock failed. In particular, in order to prepare for a failure of an electronic lock or an electromagnetic lock, it is necessary to provide a forcible release means to the lock itself, and it is inevitable that the size and cost of the lock will increase.

The inventor of this case tried to solve this problem by diligently examining this point. An object of the present invention is to make it possible to open the door of the cabinet in the event of a failure even if the lock itself does not have the forced release means in case of a failure.

In order to solve the above problems, the lock device is provided with a lock device in which the lock piece engages with the fitting portion of the cabinet by the lock operation, and the lock device is fixed to the mounting plate fixed to the door. The lock structure is provided with an opening means that allows the mounting plate to slide with respect to the door, and the lock piece can be detached from the fitting portion by sliding the mounting plate using the opening means. ..

Further, it is preferable that the mounting plate and the receiving metal fitting are fixed so as to sandwich the door by a special screw tightened from the mounting plate side.

Further, it is preferable that the tip of the receiving metal fitting is provided with a hooking portion for preventing the metal fitting from falling off.

In the present invention, it is possible to open the door of the cabinet in the event of a failure even if the lock itself does not have the forced release means prepared in the event of a failure.

It is a perspective view of the cabinet in an embodiment. However, some of the side plates are omitted. It is an exploded perspective view around the handle. However, it is a perspective view seen from the front side of the door. It is an exploded perspective view around the handle. However, it is a perspective view seen from the back side of the door. It is a perspective view which showed the arrangement of the mounting plate in a normal state. It is a front view which showed the arrangement of the mounting plate in a normal state. It is a perspective view which showed the state which moved the mounting plate from the state of FIG. 4 for unlocking. FIG. 3 is a plan view showing a state in which the mounting plate is displaced from the state shown in FIG. 5 for unlocking. It is a perspective view which showed the state of the locking device and the fitting part at the time of locking. It is the figure which looked at the state of the locking device and the fitting part at the time of locking from the back side of a door. FIG. 3 is a perspective view showing a state of a locking device and a fitting portion when the mounting plate is displaced from the state of FIG. 8. It is a figure which looked at the state of the locking device and the fitting part when the mounting plate was deviated from the state of FIG. 9 from the back side of a door.

The embodiment for carrying out the invention is shown below. The locking structure of the present embodiment includes a locking device 2 in which the locking piece 21 engages with the fitting portion 11 of the cabinet 1 by a locking operation, and the locking device 2 is a mounting plate 3 fixed to the door 12. It is fixed to. Further, the lock structure is provided with an opening means that allows the mounting plate 3 to slide with respect to the door 12, and by sliding the mounting plate 3 using this opening means, the locking piece 21 is fitted into the fitting portion. It is possible to separate from 11. Therefore, even if the lock itself does not have the forced release means prepared in case of failure, the door 12 of the cabinet 1 can be opened in the event of failure.

As shown in FIG. 1, the door 12 of the cabinet 1 of the embodiment includes a handle 13 and a locking device 2. Further, as can be understood from FIG. 2, the door 12 is provided with a through hole 14 through which the lock device 2 is inserted and a guide hole 52 for sliding the mounting plate 3. The handle 13 is used as a handle for opening and closing the door 12. The handle 13 is arranged so that the metal fitting and the clamp engage with each other on the outside (frame portion) of the opening of the cabinet 1. In the embodiment, the handle 13 and the lock device 2 are arranged side by side, but the lock device 2 is arranged so as to be located on the center side of the door 12 with respect to the handle 13.

As shown in FIG. 3, a plate-shaped lock piece 21 (bello) is attached to the tip of the lock device 2 of the embodiment. The lock piece 21 can be engaged with the hole portion 15 of the fitting portion 11 provided inside the cabinet 1 by the locking operation of the locking device 2 with a rotational operation. The lock device 2 of the embodiment can be unlocked (rotated) by a specific procedure when the special key is inserted and authentication is completed. Therefore, a person who does not know this operation cannot open the lock device 2 and is safe. Is secured.

The locking structure of the embodiment includes a mounting plate 3 for fixing the locking device 2. The mounting plate 3 is provided with a mounting hole 31 into which a screw 51 can be inserted, and the mounting plate 3 is fixed to the door 12 by using the screw 51 inserted in the mounting hole 31. The mounting plate 3 of the embodiment is fixed to the surface of the door 12 by using a special screw 51 whose head is cut out in a shape that cannot be removed by a commercially available Phillips screwdriver or a flat-blade screwdriver. At this time, the mounting plate 3 is fixed to the door 12 by tightening the special screw 51 so that the mounting plate 3 and the receiving metal fitting 6 firmly sandwich the door 12. In this way, the mounting plate 3 and the receiving bracket 6 are fixed so as to sandwich the door 12, and the mounting plate 3 and the receiving bracket 6 are tightened and fixed using the special screw 51 tightened from the mounting plate 3 side. If so, the fixed state of the mounting plate 3 and the door 12 can be released only by a person who has a special tool, so that the safety can be improved.

Arms 61 extending in the left-right direction are provided above and below the receiving metal fitting 6 of the embodiment. In the embodiment, a screw hole 63 corresponding to the screw 51 is formed in the arm portion 61. Further, by providing a portion extending downward at the tip of the upper arm portion 61, a hook portion 62 recessed upward is formed. The inside of the cabinet 1 is provided with a portion where the hooking portion 62 can be hooked, but in the embodiment, the hooking portion 62 is cabinetd by inserting the arm portion 61 into the notch portion 17 provided in the reinforcing frame 16. Can be hooked on 1. As described above, if the tip of the receiving metal fitting 6 is provided with the hooking portion 62 for preventing the metal fitting 6 from falling off, the metal fitting 6 can be prevented from falling even if the screw 51 is removed.

The reinforcing frame 16 of the embodiment is fixed to the back side of the door 12, and is provided so as to extend in the vertical direction at least on the handle 13 side of the door 12. The reinforcing frame 16 of the embodiment includes a hole 18 through which the lock device 2 is inserted. Further, a notch 17 for inserting the arm portion 61 of the receiving metal fitting 6 is formed at the vertical position of the hole 18 on the side surface side of the reinforcing frame 16. The lock piece 21 is arranged so as to project from the hole 18 of the reinforcing frame 16 toward the inside of the door 12, so that the reinforcing frame 16 does not become an obstacle when the lock piece 21 rotates. ing.

Here, the opening / closing operation in the normal state will be described. When locking, first, the handle 13 is operated to close the door 12. After that, in order to enhance security, the lock device 2 is operated to engage the lock piece 21 with the fitting portion 11 and lock the lock. In the embodiment, an electric lock is used, and after the key inserted in the lock device 2 is authenticated as correct, the lock piece 21 can be rotated by turning the key, and the lock piece 21 can be rotated. And the fitting portion 11 can be engaged with the fitting portion 11.

When opening the door 12 from the locked state, the lock device 2 is unlocked by following a specific procedure. After that, the door 12 can be opened by operating the handle 13. In the embodiment, after the key inserted into the lock device 2 is authenticated as correct, the engagement state between the lock piece 21 and the fitting portion 11 can be released by turning the key.

Next, a procedure for opening the door 12 when the lock device 2 fails, such as when the key cannot be authenticated, will be described. First, loosen the special screw 51 that secures the mounting plate 3. After that, the mounting plate 3 is moved in the left-right direction along the surface of the door 12. That is, the mounting plate 3 is moved toward the center of the door 12 so as to change from the state shown in FIGS. 4 and 5 to the state shown in FIGS. 6 and 7. At this time, the moving direction of the mounting plate 3 is guided by the guide hole 52 into which the screw 51 is inserted. That is, the screw 51 and the guide hole 52 function as opening means.

When such work is performed, the lock piece 21 and the fitting portion 21 are engaged with the fitting portion 11 as shown in FIGS. 8 and 9, and then the lock piece 21 and the fitting portion are as shown in FIGS. 10 and 11. The engagement of 11 can be disengaged. A part of the guide hole 52 of the embodiment is recessed downward, and if the screw 51 is fitted in the recess, the engagement between the lock piece 21 and the fitting portion 11 is released. It becomes easier to maintain the state.

The door 12 can be opened by operating the handle 13 after moving the mounting hole 31 in the left-right direction until the lock piece 21 is detached from the hole 15 of the fitting portion 11. Since the guide hole 52 provided in the door 12 is covered with the mounting plate 3, its shape cannot be seen directly, and a person who does not know the structure cannot easily unlock it.

In the embodiment, even if the screw 51 is completely removed, the hooking portion 62 is hooked on the reinforcing frame 16, so that the receiving metal fitting 6 is held. Therefore, it is possible to prevent an accident in which the receiving metal fitting 6 falls inside the cabinet 1 and comes into contact with an internal device.

Although the present invention has been described above by taking an embodiment as an example, the present invention is not limited to the above embodiment and can be various modes. For example, the lock piece may be configured to engage with the inside of the frame.

Also, the locking device may not be accompanied by an electrical or electromagnetic mechanism.

The guide hole may have a crank shape or the like. Security can be increased by making it more complicated.

1 Cabinet 2 Locking device 3 Mounting plate 6 Receiving bracket 11 Fitting part 12 Door 21 Locking piece 51 Screw 62 Hooking part

Claims (3)

A locking device is provided in which a locking piece engages with a fitting portion of a cabinet by a locking operation, and the locking device is fixed to a mounting plate fixed to a door.
A locking structure including an opening means that allows the mounting plate to slide with respect to the door, and the locking piece can be detached from the fitting portion by sliding the mounting plate using the opening means. The locking structure according to claim 1, wherein the mounting plate and the bracket are fixed so as to sandwich the door by a special screw tightened from the mounting plate side. The locking structure according to claim 1 or 2, wherein the tip of the receiving metal fitting is provided with a hooking portion for preventing the metal fitting from falling off.

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