JPH08144591A - Locking device - Google Patents

Abstract

PURPOSE: To firmly maintain the locked state and take an unlocking action with a simple mechanism by providing a bolt body protrudable to a key reception section, a hook section, a code lock, a driving plate, a locking plate, a motor, and a pinion, and releasing the coupling between the locking plate and the driving plate when at least one of an electric lock and a code lock is set to the unlocked state. CONSTITUTION: When an unlocking instruction is given, a motor 7' is driven, a pinion 9 fixed to a rotary shaft 7a is meshed with a rack 8a, and a locking plate 8 is lifted. An unlocking microswitch 13b is brought into contact with a contact 8b, and the motor 7' is stopped. The coupling with a driving plate 4 is released. When an exchange plate 5 is rotated CCW, a bolt body 1 is moved while the driving plate 4 is kept in slide contact with a protruded piece 10a, and the tip section of a vertical lever 6 is submerged from a receiving groove 3a for unlocking. Meanwhile, even if a locking plate 8 is not operated due to failure, a code lock 10 is operated from the outside of a vault. An unlocking action can be simply taken when the exchange plate 5 is merely rotated after the coupling between the locking plate 8 and the driving plate 4 is released.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door locking device for use in, for example, a safe or a fireproof box, and more particularly, it can be firmly locked even when an impact force is applied from the outside and is attached to the door. The present invention relates to a locking device that can be unlocked by unlocking either the electric lock or the code lock.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 8, a door body locking device has a lock receiving portion 3 in which a tip portion 1a of a bar body 1 provided on a door body A is formed at an opening edge of a case body B. It is locked and unlocked by letting it in and out. The bar 1 is supported by a long hole 1b of the bar 1 with respect to a mounting shaft 2a fixed at a predetermined position of the door A.
Is loosely fitted, and the bar 1 can move laterally within the range of the elongated hole 1b.

A locking portion 1c is formed at the upper end portion of the barb 1 and a solenoid 20 is attached slightly above the locking portion 1c. The shaft 20a of the solenoid 20 is a bar 1
The tip end portion 1a of the container protrudes at a position where it is fitted into the lock receiving portion 3 of the storage case B, and abuts on the locking portion 1c of the bar body 1 so as to be blocked and locked. In the unlocked state, an unlock signal is sent to the solenoid 20 and the shaft 20a of the solenoid 20 is retracted. Then, the exchange plate 5 arranged on the lower side of the barb 1
When is turned counterclockwise, the barb 1 moves laterally to the left in the figure,
At the same time as the engagement between the tip portion 1a and the lock receiving portion 3 is released, the tip portions of the vertical rods 6 and 6 are sunk from the receiving groove 3a and unlocked.

FIG. 9 shows another example of a conventional door locking device, which basically has the same configuration as that of FIG. The upper end portion of the bar body 1 forms front and rear locking portions 1c and 1c 'except for a cutout portion 1d near the central portion. A locking / unlocking motor 30 is arranged above the locking / unlocking motor 30.
At 0, a motor latch 32 having a pin 32a is fixed. The pin 32a of the motor latch 32 is made to face the notch portion 1d of the bar body 1, that is, between the front and rear locking portions 1c and 1c '. At the time of locking, the pin 32a contacts the locking portion 1c on the tip end side to lock the bar body 1. When in the unlocked state, the locking / unlocking motor 30 is driven by the unlocking instruction, and the motor latch 32 at the locking position is rotated by the rotating shaft 30a.
Rotate about 180 degrees. In this process, the pin 32a of the motor latch 32 comes into contact with the locking portion 1c on the rear end side of the bar 1 and pushes the bar 1 backward. As a result,
The bar 1 moves laterally to the left, and the locking between the tip 1a of the bar 1 and the lock receiving part 3 is released.

On the other hand, FIG. 10 shows still another example of a conventional door locking device, in which a cylinder lock can be unlocked by operating a key during emergency unlocking.
It is disclosed in Japanese Utility Model Publication No. 6-75367. Since the basic configuration is the same as that of the device shown in FIG. 9, the same parts and members are designated by the same reference numerals, and the description thereof will be omitted. A cylinder lock 50 for emergency unlocking is provided near the bar body 1. An unlocking fitting 52 is attached between the cylinder lock 50 and the bar 1, and the pin 32a of the motor latch 32 is locked at the lower end locking portion 5 of the unlocking fitting 52 during locking.
2a is locked. In the unlocked state, the locking / unlocking motor 30 is driven and the pin 32a of the motor latch 32 is inverted to unlock. Further, at the time of emergency unlocking, when the cylinder lock 50 is rotated in the unlocking direction, the unlocking metal fitting 52 is released.
However, it is deformed from the solid line to the position shown by the imaginary line, and the locked state with the pin 32a of the motor latch 32 is released, and the bar 1 is pushed backward. As a result, the bar 1 moves laterally to the left, and the locking between the tip 1a of the bar 1 and the lock receiving part 3 is released.

[0006]

In the conventional locking device shown in FIG. 8, a lock bar 1 is provided with a tip 1a of the lock receiving part 3 of a case B.
In the state of being fitted in, the shaft 20a of the solenoid 20 is locked to prevent lateral movement of the bar body 1 to be locked. Therefore, there is a problem in that, if the body of the housing body is laid down sideways or upside down and an impact is applied for the purpose of unauthorized unlocking, the shaft 20a of the solenoid 20 is retracted and the locked state is released. It was

Further, in the conventional locking device shown in FIG. 9, the pin 32a of the motor latch 32 is made to face the notch 1d of the bar 1 and the locking / unlocking motor 30 is rotated by 180 °.
It is to be locked and unlocked. Therefore, when the tip portion 1a of the locked barb 1 is hit backwards and attacked, the barb 1 pushes the pin 32a of the motor latch 32 in the unlocking direction,
The pin 32a, which is weak in strength, easily rotates in the unlocking direction and the locked state is released.

Further, the conventional locking device shown in FIG.
In addition to having the same problem as in FIG. 9, since the unlocking metal fitting 52 composed of a plurality of members is used at the time of emergency unlocking, the number of parts is large, the movement becomes complicated, and the adjustment at the time of manufacture is troublesome. This causes a high cost.
Further, since the cylinder lock 50 is used, there is a concern that it is not possible to completely protect against an attack by an illegal means such as so-called picking.

The present invention solves the above-mentioned problems in the conventional locking device shown in FIGS. 8, 9 and 10, and even if the bar bar in the locked state is attacked and a force in the unlocking direction is applied, An object of the present invention is to provide a locking device that can be easily released from the engagement between a locking portion and a locking member provided on a bar and can release the locked state with a simple mechanism even in an emergency. To do.

In order to achieve the above object, the locking device of the present invention is provided on the door body A, and the bar body 1 which can be retracted from the lock receiving portion 3 formed at the opening edge of the case body B. The locking portion 1c formed on the bar body 1, the code lock 10 provided on the door A, and the projecting member 10a of the code lock 10 appearing or retracting, take either an unlocking position or a locking position. Projector 10
The drive plate 4 is attached to the bar 1 so as to be slidable on a, and the rack 8a is attached to the door A so that the lock 1c of the bar 1 can be locked via the drive plate 4. The locking plate 8, the motor 7'of the electric lock 7 provided near the locking plate 8 in the door A, and the rotating shaft 7a of the motor 7'of the electric lock 7 are fixed to engage with the rack 8a. A pinion 9 for moving the locking plate 8 so as to take an unlocked or locked position by rotation of a motor 7'of the electric lock 7,
When at least one of the electric lock 7 and the code lock 10 is in an unlocked state, the locking plate 8 and the drive plate 4 are disengaged from each other.

In this locking device, the locking portion 1c is formed by bending the upper end portion of the bar body 1 into a hook shape, and the drive plate 4 is formed by bending a single steel plate into a substantially U-shaped cross section. It is characterized by being a member, and is provided with a contactor 8b on a side portion of the locking plate 8 and abuts on either of the locking or unlocking microswitches 13a and 13b arranged on the side thereof to form a bar. It is characterized in that an engagement / disengagement state between the lock plate 1 and the locking plate 8 is detected and a detection signal thereof is sent to the motor 7'of the electric lock 7. Further, an exchange plate 5 for retracting the bar 1 from the lock receiving portion 3 in a disengaging direction with the locking plate 8 and the driving plate 4 disengaged is pivotally supported on the door A. .

[0012]

The bar bar 1 is locked by engaging the driving plate 4 with the locking plate 8 at the position where the tip 1a of the bar 1 is fitted into the lock receiving part 3.
A rack 8a formed on the surface of the locking plate 8 has a pinion 9 fixed to a rotating shaft 7a of a motor 7'of the electric lock 7.
, And it is prevented from moving in the unlocking direction. When unlocking, drive the motor 7'of the electric lock 7,
Rotate the pinion 9. The rotation of the pinion 9 meshes with the rack 8a, and the locking plate 8 moves in the unlocking direction.
Then, the engagement between the locking plate 8 and the drive plate 4 of the bar 1 is released. After that, the exchange plate 5 is rotated in a predetermined direction, and the bar 1 is retracted from the lock receiving portion 3 in a direction to be retracted. On the other hand, in an emergency such as a failure of the electric lock 7, when the code lock 10 is unlocked, the protrusion 10a of the lock 10 is retracted, and the locking plate 8 and the drive plate 4 are disengaged. , The bar body 1 is retracted from the lock receiving portion 3 in the direction of being retracted.

[0013]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a front view showing a locked state of the locking device according to the present invention, as viewed from the inside of the door body A. The door body A is provided with the bar body 1 laterally at a substantially central portion, and is supported by loosely fitting the long hole 1b of the bar body 1 to the mounting shaft 2a fixed at a predetermined position of the door body A. ing. The bar body 1 is configured to be able to move laterally within the range of the elongated hole 1b, and the tip portion 1a thereof is fitted into the lock receiving portion 3 formed at the opening end edge of the storage case B to hold the locked state. There is.

On the rear side of the bar body 1, notches 1g and 1g are formed by vertically notching the notches 1g and 1g.
The drive plate 4 is housed inside. As shown in FIG. 4, the drive plate 4 is a member formed by bending a single steel plate into a substantially U-shaped cross section, and the lower end surface thereof is placed on the protrusion 10a of the code lock 10 in FIG. It is movable only in the vertical direction independently of the bar body 1, and in the front-back direction (lateral direction in the drawing), it can be moved integrally with the bar body 1 while sliding on the upper surface of the protrusion 10a of the code lock 10. . The notches 1g, 1g of the bar 1 are slightly larger than the width of the drive plate 4, and the drive plate 4 can move up and down in the vertical direction within the range of the protrusion length of the protrusion 10a of the code lock 10. Cut out to size. This notch 1g,
The upper end of the bar body 1 on the front side of 1g is bent in a hook shape to form a locking portion 1c. Projector 1 of code lock 10
In the state shown in the figure in which 0a is projected, that is, when the code lock 10 is locked, the drive plate 4 is located on the upper side of the cutouts 1g, 1g, and the upper bent portion 4a (Fig. 5) of the drive plate 4 is locked. It is locked in a state of being adjacent to and abutting on the portion 1c.

On the other hand, the drive plate 4 is the locking portion 1 at the upper end of the bar body 1.
When the electric lock 7 is locked on the drive plate 4 in the state of being locked to the c shown in FIG. 1, the tip 1a of the bar 1 is the lock receiving portion 3 of the case B.
The locking plate 8 is locked so that the barb 1 is prevented from laterally moving to the left in the drawing at the position where the locking plate 8 is fitted. A rack 8a is formed on the surface of the locking plate 8. A guide member 11 having a U-shaped cross section is fixed to the door A, and plate members 11a, 11a above and below the guide member 11 are fixed to the door member A as shown in FIGS.
As shown in FIG.
Is pierced. The locking plate 8 has the upper and lower holes 11b, 11b.
Is inserted into. Therefore, the locking plate 8 is the guide member 1
It is possible to move up and down along the one hole 11b, 11b. A motor 7'of an electric lock 7 is attached near the locking plate 8 in the door A of FIG. A pinion 9 is fixed to a rotary shaft 7a of a motor 7'of the electric lock 7 and meshed with the rack 8a of the locking plate 8 described above. Therefore, the locking plate 8 is driven by the motor 7'of the electric lock 7,
It moves up and down between the position of the solid line and the position of the virtual line in FIG.
A contactor 8b is fixed to a side portion of the locking plate 8 and is brought into contact with either of the locking or unlocking microswitches 13a and 13b arranged on the side of the contactor 8b, so that the locking plate 8 has a solid line. Position or virtual line position, that is, bar 1
The engagement / disengagement state between the lock plate 8 and the lock plate 8 is detected, and the detection signal is sent to the electric lock 7
Is being sent to the motor 7 '.

In the state of FIG. 1 in which the electric lock 7 and the code lock 10 are locked, as shown in FIGS. 3, 4, and 5, the locking plate 8, the drive plate 4, and the locking portion 1c of the bar 1 are provided. 1 are locked adjacent to each other and the movement of the bar 1 to the left in FIG. 1 is prevented, so that the front end 1a of the bar 1 is held in the locked state in which the lock 1 is fitted. There is. In this case, the upper bent portion 4a of the drive plate 4 is securely engaged with the locking plate 8 and the locking portion 1c of the bar body 1 to strengthen the locking.

An exchange plate 5 is disposed below the bar body 1. The exchange plate 5 has its shaft 5a pivotally supported by the door body A, and is rotatable within a range of an arc-shaped long hole 5b loosely fitted to a mounting shaft 2b fixedly installed on the lower side of the door body A. A shaft 5c is projectingly provided on the upper side of the exchange plate 5, and an elongated hole 1f formed in the bar 1 is provided.
Is engaged with. The rotating means of the exchange plate 5 is performed, for example, by connecting a rotating operation of a handle or a lock (not shown) attached to the surface of the door body A to the attachment shaft 2b of the exchange plate 5. In addition, at the left and right positions of the exchange plate 5, the shafts 5d, 5
The vertical rods 6, 6 are pivotally supported by d, and the tip ends of the vertical rods 6, 6 are fitted in the receiving grooves 3a formed in the upper and lower edges of the case B, and by the rotation of the exchange plate 5, It appears in and out of the receiving groove 3a and engages and disengages. In addition, between the vertical rod 6 and the door A,
The spring 15 is elastically mounted so that the vertical rod 6 is always biased in the locking direction.

Next, the case where the locked state in FIG. 1 is changed to the unlocked state will be described. Normally, the electric lock 7 is used for locking and unlocking. When an unlocking instruction is given to the electric lock 7 by operating a ten-key pad or the like (not shown) provided on the surface of the door body A, the motor 7'of the electric lock 7 is driven and unlocked. That is, the rotating shaft 7 of the motor 7'of the electric lock 7
Since the pinion 9 fixed to a is meshed with the rack 8a on the surface of the locking plate 8, the locking plate 8 at the locking position
Rises from the position of the solid line shown in the enlarged view of FIG. 3 to the position of the phantom line, and the microswitch 13b for unlocking locks the locking plate 8
Then, the motor 7'of the electric lock 7 is stopped by contacting the contactor 8b. When the locking plate 8 rises to the position of the imaginary line,
The engagement with the drive plate 4 is released, and the bar 1 can be moved leftward in the drawing. In this state, when the rotating means is operated to rotate the exchange plate 5 in the counterclockwise direction, the drive plate 4 is locked by the code lock 10.
While the sliding contact is made on the upper surface of the projecting element 10a, the barb 1 laterally moves to the left, and the engagement between the tip portion 1a and the lock receiving portion 3 is released, and at the same time, the tip portions of the vertical rods 6 and 6 are received in the receiving grooves. It is sunk from 3a and unlocked. FIG. 6 is a front view of the locking device showing the unlocked state of the electric lock 7 described above. A micro switch 17 is provided near the right end of the locking portion 1c formed at the upper end of the bar 1 to detect the unlocked state of the bar 1.

On the other hand, in an emergency, such as when the electric lock 7 fails and the locking plate 8 does not operate, the code lock 10 is used to unlock. When the code lock 10 is unlocked from the outside of the refrigerator, the protrusion 10a of the lock 10 retracts downward. Along with this, the drive plate 4 descends by its own weight to the position where the engagement with the locking plate 8 is released (the position shown by the phantom line in FIG. 4), and the lower side of the cutouts 1g, 1g of the bar body 1 The upper surface of the drive plate 4 is located below the lower end of the locking plate 8. Drive plate 4
The micro switch 18 provided above the drive plate 4 is
Whether the lock portions 1g, 1g are located on the lower side or the upper side, that is, the locked / unlocked state of the code lock 10 is detected. When the engagement between the drive plate 4 and the locking plate 8 is released,
The barb 1 can be laterally moved to the left in the figure. In this state, when the rotating means is operated to rotate the exchange plate 5 in the counterclockwise direction, the drive plate 4 makes sliding contact with the upper surface of the projecting member 10a or the upper surface of the code lock 10 in the retracted state, and the bar body. 1 moves laterally to the left, and the engagement between the tip end portion 1a and the lock receiving portion 3 is released, and at the same time, the tip end portions of the vertical rods 6 and 6 are sunk from the receiving groove 3a and unlocked. FIG. 7 is a front view of the locking device showing the unlocked state of the code lock 10 described above.

In this embodiment, the bar body is provided on the door body so as to be movable laterally, and the locking plate formed on the bar body is engaged with the locking plate from above via the drive plate, and the drive plate is driven. Although the case where the code lock is arranged in the lower part of the plate has been described, the arrangement positional relationship of the barb, locking plate, electric lock motor, drive plate, code lock and other members is not limited to this example. Instead, it can be changed as appropriate, such as mounting it in the opposite position.

[0021]

As described above, according to the locking device of the present invention, in order to lock the bar, instead of using the conventional weak member such as the shaft rod of the solenoid or the pin of the motor latch, the strength is weak. Since a robust locking plate is used, even if an external attack is applied to the door for the purpose of unauthorized unlocking, the lock between the bar and the locking plate is released and the locked state is released. It is possible to prevent the occurrence of such a situation as much as possible. The lock plate is engaged with the pinion fixed to the rotating shaft of the electric lock motor, and does not move up and down unless the electric lock motor is driven, so that the bar and the lock plate can be securely engaged and disengaged. , The locked state can be firmly maintained. Therefore, it is more secure and safe against external attacks.

Further, since the drive plate is housed in the notch of the bar body and the drive plate is linked with the protrusion / removal of the protrusion by locking / unlocking the code lock, the door can be locked / unlocked in an emergency. Compared with the conventional emergency unlocking means using the unlocking metal fitting, the structure is simple, the number of parts is small, the adjustment at the time of manufacture is easy, and the cost can be reduced. Furthermore, because it uses a code lock, unlike a cylinder lock, there is no danger of being unlocked by picking, and even if the locking device is attacked by a drill etc., it will not be easily unlocked, so it is safe. Is.

On the other hand, the unlocking operation can be easily performed only by unlocking the electric lock or the code lock, releasing the engagement between the locking plate and the drive plate, and then rotating the exchange plate in a predetermined direction.

[Brief description of drawings]

FIG. 1 is a front view showing a locked state of a locking device according to the present invention.

2A and 2B are enlarged plan sectional views taken along the arrow C in FIG.

FIG. 3 is an enlarged view of a main part of FIG. 1;

FIG. 4 is a side sectional view showing a locked state of the locking device according to the present invention.

FIG. 5 is an enlarged side view showing a locked state of the locking device according to the present invention.

FIG. 6 is a front view showing an unlocked state of the locking device according to the present invention with an electric lock.

FIG. 7 is a front view showing an unlocked state of the locking device according to the present invention with the code lock.

FIG. 8 is a front view showing an example of a conventional locking device.

FIG. 9 is a front view showing another example of a conventional locking device.

FIG. 10 is a front view showing still another example of the conventional locking device.

[Explanation of symbols]

 A ... Door body B ... Storage body 1 ... Barbed body 1a ... Tip part 1c ... Locking part 3 ... Lock receiving part 4 ... Drive plate 5 ... Exchange plate 7 ... Electric lock 7 '... Motor 7a ... Rotating shaft 8 ... Locking plate 8a ... rack 8b ... contact 9 ... pinion 10 ... code lock 10a ... projector 11 ... guide member 11a ... plate-like body 11b ... hole 13a ... locking micro switch 13b ... unlocking micro switch

Claims (5)

[Claims] 1. A bar 1 provided on the door A and capable of retracting into and from a lock receiving part 3 formed on an opening edge of a case B, and a locking part 1c formed on the bar 1. The code lock 10 provided on the door A and the protruding element 10a of the code lock 10 are in an unlocked or locked position depending on the appearance of the protruding element 10a.
0a has a drive plate 4 attached to the bar 1 so that it can be slidably contacted, and a rack 8a attached to the door A so as to be able to engage with the locking portion 1c of the bar 1 via the drive plate 4. Locking plate 8 and
A motor 7'of an electric lock 7 provided near the locking plate 8 in the door A, and a rotation shaft 7a of the motor 7'of the electric lock 7.
A pinion 9 that is fixed to the rack 8a and that engages with the rack 8a to move the locking plate 8 to either the unlocked or locked position by the rotation of the motor 7'of the electric lock 7. The locking device is configured such that the engagement between the locking plate 8 and the drive plate 4 is disengaged when at least one of the code lock 10 is in the unlocked state. 2. The locking device according to claim 1, wherein the locking portion 1c is formed by bending the upper end of the bar body 1 into a hook shape. 3. The locking device according to claim 1, wherein the drive plate 4 is a member formed by bending a single steel plate into a substantially U-shaped cross section. 4. A contactor 8b is provided on a side portion of the locking plate 8 and is brought into contact with either of the locking or unlocking microswitches 13a, 13b arranged on the side thereof to contact the bar body 1 and the locking plate 8 with each other. The locking device according to any one of claims 1 to 3, wherein an engagement / disengagement state of the electric lock 7 is detected and a detection signal thereof is sent to a motor 7'of the electric lock 7. 5. The door plate A is pivotally supported by an exchange plate 5 for retracting the bar 1 from the lock receiving portion 3 in a disengaged state of the locking plate 8 and the drive plate 4. Claims 1 to 4
The locking device according to any one of 1.