JPH0712568Y2 - Locking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a locking device, and more particularly to a device suitable for a relatively simple locking means that is opened and closed by many workers such as a switchboard door. .

[Conventional technology]

Switchboards used for electric lights, appliances, electric motors, and other electric circuits in buildings and factories are configured with cabinets to ensure functional safety.

The door of this cabinet is provided with a locking device to prevent accidental opening and opening by mischief.
On the other hand, this locking device is required to be able to open and close the door body promptly by many specific workers during periodical inspection of the power circuit and in emergencies.

Conventionally, a structure of a device has often been adopted in which a latching metal provided on a door body is normally engaged and disengaged by a handle operation, and a locking operation by a key is performed to prevent an engaging / disengaging operation of the latching metal when necessary.

[Problems to be solved by the device]

In a cabinet that opens and closes by key operation, it cannot be opened unless workers etc. carry the key all the time.
It is difficult for many workers to have a key and it is inconvenient in an emergency. As this kind of locking means,
An electromagnetic lock type such as a dial lock or an electronic code lock that does not require key operation is desired, while this type of type has a problem in the lock opening / closing operation due to a power failure or a failure of the code matching circuit or the electromagnetic circuit. It is difficult to discard the conventional locking means by key operation because of the reliability of its operation.

An object of the present invention is to provide a device that can easily be used in combination with an electromagnetic lock means controlled by an electronic code lock or the like and a mechanical lock means by key operation.

[Means for Solving the Problems]

In order to achieve the above object, the present invention mounts a latching metal fitting on the inside of the door body connected to a handle on the outside of the door body so as to be pivotable between the latching position and the releasing position. An engaging step is formed on the turning edge of the latch, and a disc with an arcuate recess on the outer circumference is coaxial with the latch and the same direction as the latch. The pin is arranged so as to provide a turning tendency, and a pin that faces the recessed portion of the disk from the hook metal is provided. On the other hand, the locking rod integrated with the rod of the electromagnetic solenoid operated by the electronic code lock or the like is made to face the engagement step of the latching metal under the bias of the projecting tendency. Moreover, the tip of the locking rod contacts the one end of the recessed portion that turns while being regulated by the pin of the latching metal fitting toward the locking position, and prevents the disc from rotating further. . Furthermore, in the range of movement of the suspension part provided on the locking rod,
A lever that is rotated by key operation is arranged in a direction intersecting with this.

[Action]

The latch metal provided on the inside of the door body can normally freely rotate between the latching position and the release position by operating a handle on the outside of the door body. Therefore, the door body can be opened by operating the release handle with the door body closed, and the metal fitting provided on the frame side and the metal fitting on the frame side can be engaged by the latch handle operation to lock the door.

The disk arranged coaxially with the latch metal is rotatable with respect to the latch metal within the arc range of the recess due to the restriction of the pin facing the recess on the outer periphery. Due to the biasing force of the disc, the disc is normally in a predetermined position with respect to the latch.

When the disc is in a predetermined normal position (a state in which the end of the recessed portion and the pin are in contact with each other), the locking rod for the latch is in a state where its tip is in contact with the peripheral edge of the disc. Entry into the engaging action of the stop bar is prevented.

Therefore, in this state, the locking action by the locking rod does not occur,
The hook metal can be operated freely by operating the handle.

In the state in which the disk has one end of the recessed portion abutted against the pin standing up from the latch, the disk rotates integrally with the pivoting movement of the latch toward the release position. .
By this rotation, the relative position between the tip of the locking rod and the side of the latch is changed, and when the tip of the locking rod exceeds the pin position, the biasing spring force of the locking rod causes a large expansion in the recess. invade. The approaching position of the locking rod is regulated by the contact between the turning rod and the locking rod that are continuous with the engagement step of the latching metal fitting.

Rotation (handle operation) of the latching metal fitting from the release position to the latching position causes the locking rod to change its relative position while sliding on the turning edge toward the engaging stepped portion, and to move relatively while overcoming the pin. The tip of the latching metal is brought into contact with one end of the recessed portion of the disc, and this is pushed against the turning tendency.

As a result, when the relatively moving locking rod reaches the engaging step portion of the latching metal fitting, the locking rod penetrates deeply into the engaging step portion due to the urging force, and at the same time, the latching metal fitting moves in the turning range. Since it has been rotated to one end, the movement in the rotation direction up to that point is prevented and the latching metal is also prevented from rotating in the opposite direction due to the engagement of the locking rod and the step portion. To be done.

At this time, since the other turning end of the hooking metal engages with the metal fitting on the frame side, the device is held in the hooked state.

From this state, when the electromagnetic solenoid is powered by the code matching operation or the remote operation of the electronic code lock, the electromagnetic solenoid excited by this operation resists the rod, that is, the locking rod integrated with the rod against the biasing spring force. Then pull it down.

By this operation, the holding action for the disc that has been pushed and turned against the turning tendency at the tip of the locking rod is released by the withdrawal of the tip of the locking rod, so that this disc follows the turning tendency. It returns to the rotation restricted range by the pin and rotates.

Moreover, since this return rotation is carried out so as to pass over the tip of the retracted locking rod, after the recessed portion of this disk has passed the tip of the locking rod, the electromagnetic solenoid is excited to the locking rod. Even if the suction action is released, the locking rod that tries to return to the protrusion by the urging force has the circular edge of the disk in front of its tip, so it cannot penetrate into the protrusion and the locking step of the latching metal fitting. It is in a state of being retracted from the engagement position with respect to

In this way, it is possible to control the engagement and disengagement of the locking rod with respect to the latching metal fitting by the clutch action of the disc, and it is possible to freely rotate the latching metal fitting by operating the handle in the released state. The latching by the latching metal and the release from the latching position can be performed.

The locking rod can be mechanically retracted by turning the lever that intersects with the engaging portion of the locking rod by key operation instead of the retracting operation by the excitation drive of the electromagnetic solenoid of the locking rod. It is possible to freely rotate with the handle of the hook.

〔Example〕

 Next, an embodiment of the present invention will be described.

FIG. 1 is a side view showing an embodiment of the device of the present invention, and FIG. 2 is a plan view of the same. The latching metal fitting 1, which is integrally connected via the handle A and the support shaft 2, is rotatably assembled to the assembly base plate 3 within a range of a swivel angle of approximately 90 ° between the locked position and the unlocked position. There is.

The other turning end of the latching metal 1 with respect to the one latching end 1a is formed on a cam surface composed of an approximately 1/4 circular arc surface 1b and an approximately 1/4 circular arc surface 1c which is continuous through the step 4. I am doing it.

A clutch plate 5 is attached to the supporting shaft 2 below the latch metal 1 so as to rotate itself, and the clutch plate 5 itself is given a turning tendency in the same direction as the locking direction of the metal fitting 1 by a winding spring 6. In addition, the engaging pin 8 hanging from the latching metal fitting 1 is made to face the recessed portion 7 provided in a ground paper shape on a part of the outer periphery of the clutch plate 5, and the free rotation area of the clutch plate 5 is regulated. At the same time, in a region beyond the free rotation region, the clutch plate 5 is swung by the latching pin 1 that abuts one end of the recessed portion 7 by following the latch metal 1. In addition, 9 indicates a support ring that also serves as a mounting portion of the support shaft 2 to the assembly substrate 3.

The locking rod 10 is configured integrally with the rod 11a that is pulled in by the exciting operation by energizing the electromagnetic solenoid 11, and is constantly extended by the expanding force of the biasing spring 12 so that the protruding direction to the right in the figure is applied. It faces the metal fitting 1. A state in which the projecting inner end 10a of the tip of the locking rod 10 formed in two steps enters the recessed portion 7 of the clutch plate 5, and the outer end 10b engages with the step 4 of the latch metal 1. Or the protruding inner end 10a abuts the circumferential surface of the clutch plate 5,
It is configured such that any one of the states in which the outer end 10b is retracted outside the turning range of the step 4 can be selected.

One of the operation of selecting the state of the locking rod 10 is performed from the state where the step 4 is locked by the outer end 10b of the locking rod 10. That is,
In this locked state, the clutch plate 5, which is pushed into one end of the recessed portion 7 by the inner end 1a that has entered the recessed portion 7, is biased in the rotational direction to the position shown by the solid line in FIG. Yes, when the electromagnetic solenoid 11 is energized by a switch operation such as an electronic code lock (not shown) or a remote operation, the rod 11a resists the movability of the biasing spring 12 and moves to the left in the figure. Be drawn into.

As a result, the locking rod 10 is likewise integrally drawn, and the inner end 10a thereof is retracted from the recessed portion 7. By this operation, the clutch plate 5, which has been released from the pushed state, rotates in the clockwise direction in the figure according to the turning tendency of the winding spring 6 so that the tip end edge of the recessed portion 7 comes into contact with the suspension pin 8. It works all at once until you block it. Therefore, the circumferential surface of the clutch plate 5 invades and occupies the front of the retracted inner end 10a, and for example, energization of the solenoid 11 for a short time in a pulsed manner is interrupted, and the rod 11a Also, even if the locking rod 10 tries to move and return to the right in the figure due to the protruding tendency, the inner end 10a comes into contact with the circumferential surface of the clutch plate 5 and cannot move further in the protruding direction. When the inner end 1a is in contact with the circumferential surface of the clutch plate 5, the outer end 10b of the locking rod 10 is largely retracted from the step 4 of the latch metal 1, so that the latch metal 1 is released. It is possible to rotate in the lock direction,
As shown by the chain line in FIG. 3, the unlocking operation is performed by operating the handle of the latch metal 1.

As a result, the latch metal 1 is disengaged from the engaging metal fitting 15 on the frame side 14 with respect to the door body 13 on the mounting side, and the door body 13 can be freely opened.

The latching metal fitting 1 reaching the final range of the unlocking operation pushes one end of the concave portion 7 of the clutch plate 5 by the pivotal movement of the pin 8, and the clutch plate 5 causes the spring 6 to move.
Since it is rotated counterclockwise in FIG. 3 in association with the rotation of the latching metal 1, the circumferential surface of the clutch plate 5 is fixed to the inner end 10a of the locking rod 10. Removed from the front,
As a result, the locking rod 10 is in the state shown by the solid line in FIG. The locking metal fitting 1 is rotated in the locking direction (clockwise in the figure), while the outer end 10b of the rod 10 is slidingly contacting the circular arc surface 1c of the metal fitting 1 (chain line shown in FIG. 4). , Reach the engagement position where it falls into the step 4.

For electromagnetic operation mechanism such as electronic code lock,
A key operation mechanism by mechanical means is installed side by side.

That is, an engaging pin 16 which doubles as a connecting pin for the locking rod 10 and the rod 11a extends from the locking rod 10, and a lever 17 is attached to the shaft 18 so as to cross the pin 16 in the moving range. The key B is configured to be rotatable. Besides, 19 is a regulating plate integrated with the lever 17, and the stopper 21 acting on the cut groove 20 regulates the rotatable range of the regulating plate 19 and the lever 17.

In the locking rod 1 in the locked state, the lever 17 is rotated clockwise by a key operation in place of energizing the electromagnetic solenoid 11 so that the lever 17 swings the tether pin 16 at its turning end. , Together with the locking rod 10 against the force of the biasing spring 12,
In the same figure, since it is pushed to the left side, the locking rod 10 is retracted from the projecting position (locking position), and the inner end 10a of the locking rod 10 is attached to the clutch plate 5 as in the case of the electromagnetic operation described above. After the recessed portion 7 is retracted, the clutch action of the clutch plate 5 thereby releases the engagement action between the clutch rod 5 and the latch metal 1, and the state shown in the third illustration is obtained. After the operating state, the operating state of being locked again can be repeated.

[Effect of device]

Since the device according to the present invention is configured as described above,
An electronic code lock etc. is adopted by moving the locking rod by the exciting action of the electromagnetic solenoid for a short time to release the lock, and similarly by moving the locking rod by a key operation in a mechanical mechanism. In addition to unlocking by, you can also open the door by key operation. Therefore, the device according to the present invention is suitable as a device operated by a specified number of persons, such as a door locking device such as a switchboard.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing an embodiment of the device of the present invention, FIG. 2 is a plan view of the same, and FIGS. FIG. 1 ... Latch metal fittings, 2 ... Support shaft 3 ... Assembly board, 4 ... Step 5 ... Clutch plate, 7 ... Recessed portion 8 ... Pin, 10 ... Locking rod 11 ... Electromagnetic solenoid , 15 …… Engagement fitting 17 …… Lever

Claims (1)

[Scope of utility model registration request] 1. A latching metal fitting on the inside of the door body, which is connected to a handle on the outside of the door body, is pivotably mounted between its latching position and its releasing position, and the pivoting edge of the latching tool is While forming the engagement step, a circular plate provided with an arcuate recessed portion on the outer periphery is provided with a turning tendency coaxial with the latch metal and in the same direction as the latch direction of the metal latch. And a pin facing the recessed portion of the disk from the latching metal, and on the other hand, the locking rod integrated with the rod of the electromagnetic solenoid operated by an electronic code lock or the like is biased in a protruding direction. It is made to face downward toward the engaging stepped portion of the latching metal fitting, and the tip of the locking rod contacts one end of the recessed portion that turns while being regulated by the pin of the latching metal fitting toward the locking position. And contacting the disk to prevent further rotation of the disk. The transfer zone of Kakarika portion provided in rod, locking device formed by arranging the lever to rotate by a key operation in a direction crossing therewith.