JPH06129146A - Locking device for door - Google Patents

Abstract

PURPOSE:To prevent execution of erroneous unlocking by a method wherein when a door is closed in a state that a key is left inserted and the key is unlocked again, unlocking is impossible to make unless the key is rotated in a reverse direction to an unlocking direction. CONSTITUTION:In a case a key 13 inserted in a key hole 1 is rotated to a locking position when a door A is closed, since an actuating lever 2 is situated in a position where it is not positioned facing an escape link 9, unlocking is not effected through closing operation of a door. In a case the key 13 is rotated to an unlocking position, since during closing of a door, the actuating lever 2 is situated in a position where it is positioned facing the escape link 9, the actuating lever 2 is collided with an engaging protrusion 91 of the escape link during movement of a door to a closing state but the escape link is rocked around a pin 10 and moved backward, whereby the lock is not varied from a locked state to an unlocked state. When a door is opened again after closing of the door, after the key 13 is rotated clockwise from an unlocking position to a locking position once, the key is rotated leftward to the unlocking position and this way enables execution of unlocking.

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.

[0002]

2. Description of the Related Art For example, in an automatic baggage delivery device, when a baggage is to be deposited or collected, it can be temporarily stored in a plurality of article storage boxes (hereinafter simply referred to as boxes) or a plurality of boxes. There is one that is configured so that the electric locks of the doors of a plurality of boxes can be unlocked / locked at the same time so that they can be taken out from the door.

Generally, an electric lock uses a solenoid with a return spring, and the solenoid is energized and driven to maintain an unlocked state, and the energization is stopped to maintain the locked state via the return spring. It has become. A considerable amount of power is consumed to drive the solenoid. Therefore,
In order to drive a plurality of electric locks at the same time and maintain the unlocked state, the load on the power source increases.

Therefore, a monostable holding means for driving in either a locked state or an unlocked state and holding the driven one,
For example, it has been proposed to eliminate holding power by employing an electric lock that uses a monostable latching solenoid. Further, even when simultaneously driving a plurality of solenoids, a large amount of electric power is required. Therefore, in order to reduce power consumption, it has been proposed to drive the solenoids in a time division manner.

By the way, an electric lock using a monostable holding means such as a monostable latching solenoid is designed to be stable in either a locked state or an unlocked state, which is driven. There is a range of distance that is returned to either stable position in the range of movement.

Therefore, in the electric lock having the conventional monostable holding means, when the key inserted into the keyhole is turned and temporarily unlocked during a power failure, it is held in the temporarily unlocked state regardless of whether the door is opened or closed. Even when the door is opened and the door is closed after, for example, depositing or picking up the luggage of the box, the door remains in the unlocked state and cannot be locked unless the key is used. Therefore, when the door is closed, there is a problem that the lock is forgotten and the key is pulled out, and it takes time and effort to lock.

Therefore, according to the present invention, in the lock device having the monostable holding means, when the door is opened by temporarily unlocking the key, the key remains at the unlocking position when the door is closed. However, the purpose is to ensure that the door is locked.

When the door is closed with the key inserted,
When it is desired to unlock again, the purpose is to prevent accidental unlocking by turning the key in the direction opposite to the unlocking direction so that the key cannot be unlocked.

[0009]

In order to solve the above-mentioned problems, a door locking device according to the present invention is an electric device having a monostable holding means for holding the door in either a locked state or an unlocked state. A lock body, a temporary unlocking means for temporarily unlocking the locked state of the electric lock body by inserting and turning a key, and a temporary unlocking function of the temporary releasing means, which is connected to the lock shaft of the electric lock body. The lock shaft is moved to an unlocked position against its return force, and the lock shaft is released by the opening of the door to return the lock shaft.

The electric lock body having the monostable holding means is a monostable latching solenoid.

Further, the latching plate engaged with the lock shaft of the monostable latching solenoid is a plate protruding from the door to the back side, and the plate is inserted into the hole of the main body to which the door is attached, It is characterized by having a hole to be engaged with the lock shaft.

[0012]

Function: The electric lock body is stable in the locked state even in the power failure state. When the key is inserted into the keyhole of the electric lock body and rotated in a predetermined direction in the power failure state, the temporary unlocking means moves the lock shaft to the unlocking position and temporarily unlocks it. Therefore, the door can be opened. When the door is opened, the engagement means releases the lock shaft. As a result, the lock shaft returns to the locked position, so that the lock shaft engages with the latching plate of the door and is locked when the door is locked or the key is removed and the door is closed.

[0013]

Embodiments of the present invention will now be described with reference to the drawings.

In the figure, A is a door, and B is a main body to which the door A is pivotally attached. The main body B has an opening opened and closed by the door.

As shown in FIG. 2, the door A has a keyhole 1, an operating lever 2 rotated by a key inserted in the keyhole, and a latching plate 3 fixed to the door and protruding from the back surface of the door. Have. The latching putt 3 has at least a fixing portion 31 for fixing to the door and an engaging portion 32 protruding from the back surface of the door, and may have an L-shaped side surface, but in the illustrated example, the fixing portion 3 From the upper end of 31 to the engaging portion 3
2, an operating unit 3 for operating the door sensor S ₁ attached to the main body for detecting the opening and closing of the door, protruding in parallel with 2.
3, the side shape is U-shaped.

Among the peripheral walls of the opening 4 of the main body B, in the peripheral wall 5 on the side opposite to the hinge for pivotally attaching the door A to the main body B, the lock device constituent members constituting the essential part of the present invention are as follows. Installed on.

That is, first, the electric lock body 6 having the monostable holding means is mounted in the mounting space formed by the panel forming the peripheral wall 5. In the illustrated example, a monostable latching solenoid 61 is used for the electric lock body 6 having the monostable holding means. As shown in FIG. 3, this monostable latching solenoid is provided with a suction coil C ₁ and a recovery coil C _2, and a midpoint between the suction coil C ₁ and the recovery coil C ₂ is either between the suction coil end and the recovery coil end. ,
It has a monostable holding means composed of an electric circuit configured to selectively apply the DC power source E by a changeover switch SW. A lock shaft 62, which is a plunger, is movably inserted into the two coils C ₁ and C ₂ , and when the changeover switch is turned to the suction side O, the magnetic field generated in the suction coil C ₁ is attracted. The lock shaft 62 is moved downward in each figure by the force, and when the changeover switch SW is tilted to the restoration side C, the lock shaft 62 is moved upward by the attraction force of the magnetic field generated in the restoration coil C _2. Has become.

Since a return spring 65 that urges in the recovery direction is interposed between the stopper 63 fixed near the upper end of the lock shaft 62 and the solenoid case 64, a voltage is applied to the suction side and the lock shaft 62 is applied. Is held in the suction state even if the power is turned off after being sucked, but if a voltage is applied to the restoration side in the holding state, the lock shaft 62
Is restored and is kept in the restored state.

The peripheral wall 5 of the main body B is provided with two slits 51 and 52 at positions corresponding to the engaging portion 32 and the operating portion 33 of the latching plate 3 of the closed door A. Then, when the door is closed, the engaging portion 32 of the latching plate 3 of the door
The operating part 33 is inserted into the slits 51 and 52, respectively. The engaging portion 32 to be inserted is positioned so as to move transversely to the vertical position of the upper end of the lock shaft 62 of the electric lock body 6. Further, a hole 34 into which the upper end of the lock shaft 62 can be fitted is formed in the engaging portion 32, and a taper 321 is provided at the tip of the engaging portion 32.

The upper end surface of the lock shaft 62 has a taper 6
Since 21 is provided, when the electric lock body 6 is in the locked state at the time of inserting the engaging portion 32 of the latching plate 3, that is, when the lock shaft 62 is raised, the tip of the engaging portion 32 is When the taper 321 hits the taper of the upper end surface of the lock shaft 62, the lock shaft 62 is slightly pushed down and further advanced, and when the door is completely closed, the upper end portion of the lock shaft 62 is inserted into the hole 34 of the engaging portion 32. Is inserted and is returned and raised by the return spring, so that it is locked.

In the solenoid case 64 of the electric lock body,
A guide plate 7 extending downward is fixed, and the guide plate is
Horizontally protruding guide pins 71 and 72 are provided at at least two positions, and a guide slit 73 that extends vertically and extends in the front-rear direction is provided at a lower end portion.

A link member 8 is held on the guide plate 7 so as to be movable up and down. The link member 8 has a connecting portion 81.
And an extension portion 82 are integrally provided. The connecting portion 81 has a hole 83 formed in the connecting portion 81, in which the lock shaft 6 of the electric lock body is provided.
2 is inserted and connected, and the extension portion 82 extends downward from the connection portion 81 in parallel with the guide plate 7, and the guide plate 7 is inserted into the vertically long holes 84 and 85 provided above and below the extension portion. By inserting the guide pins 71 and 72 and attaching a stopper washer or the like to the ends of the guide pins, the link member 8 is held by the guide plate 7 so as to be vertically movable. In the link member 8,
Furthermore, an operation unit 86 that operates the lock sensor S2 that detects the unlocked / locked state is provided.

An escape link 9 is pivotally attached to the link member 8 by a pin 10 so as to be swingable. The escape link 9 is formed in a substantially inverted L shape, and its lower end is urged forward by an elastic member such as a coil spring 11 stretched between a rear end of the escape link 9 and the guide pin 72 of the guide plate 7. There is. However, the lower end portion of the escape link 9 is loosely inserted into the guide slit 73 of the guide plate 7, and the engaging projection 91 formed at the intermediate portion of the escape link 91.
Is held in the guide slit 73 so as to be able to move up and down and move in the front-rear direction without coming into contact with the back surface of the peripheral wall 5 of the main body B.

The coil spring 12 stretched between the guide plate 7 and the link member 8 reduces the load applied to the lock shaft 62 by the link member 8 by the pulling force of the coil spring 11, and It is provided to prevent twisting movement of the link member 8 around the guide pin 71.

Further, on the peripheral wall 5 of the main body B, the center of rotation and the center of the operating lever 2 are common at positions corresponding to the engaging protrusions 91 of the operating lever 2 and the escape link 9 when the door A is closed. Arc hole with an arc angle of 90 °
Is provided. Then, while moving the operating lever 2 in the closed state from the locking position, that is, the position vertically upward as shown in FIGS. 2 and 4, to the unlocking position, that is, while moving horizontally, the operating lever 2 moves. The positional relationship is set so as to engage with the engaging protrusion 91 of the escape link 9 and move it downward.

With the above structure, when the electric circuit of the monostable holding means of the electric lock body 6 is energized in the closed state and the changeover switch SW is turned to the unlocking side (O side), the lock shaft 62 is sucked. Therefore, the upper end of the lock shaft 62 is released from the hole 34 of the engaging portion 32 of the latching plate 3 to be unlocked, and the door can be opened. Moreover, once unlocked, the unlocked state is maintained. Therefore, when giving an unlocking command to many electric lock bodies at the same time,
If it is given in a time-sharing manner, power consumption will be reduced.

Further, the changeover switch SW is set to the lock side (C
Side), the return spring 65 causes the lock shaft 6 to
2 is restored and retains the restored state, that is, the locked state.

In this locked state, when it is desired to unlock the power when a power failure occurs, a temporary unlocking operation using a predetermined key is required. That is, when the predetermined key 13 is inserted into the key hole 1 of the closed and locked door A and is rotated in a predetermined direction (leftward in the illustrated example), as an example, 90
° It is stopped at the rotated position and locked by frictional force. During this rotation, the operating lever 2 moves the escape link 9
The escape link is engaged with the engaging projection 91 of the guide plate 7
Since it is moved downward along the guide slit 73 of
The link member 8 is likewise lowered. Therefore, the lock shaft 62 connected to the link member 7 is lowered, and the upper end of the lock shaft is disengaged downward from the hole 34 of the engaging portion 32 of the latching plate 3. That is,
The electric lock body is unlocked. Therefore, the door A can be opened by holding the handle 14 and pulling it toward you. Then, when the door A is opened, the actuating lever 2 is also moved forward together, so that the actuating lever 2 engaged with the engaging protrusion of the escape link is released from the engaging protrusion 91. When unlocked, the operating part 86 of the link member 8 descends and the lock sensor S ₂ is no longer operated, so that the unlocked state is detected. Further, since the door sensor S ₁ is not operated by the operation unit 33 when the door is opened, the door open state is detected.

Here, when the lock lever is unlocked, the amount of downward movement of the operating lever 2 is such that the lock shaft 62 of the electric lock body 6 having the monostable holding means moves from the locked position to the unlocked position side. It is set so that it will not monostable. Therefore, when the actuating lever 2 releases the engaging projection 91 by opening the door, the escape link 9 and the link member 8 are raised by the return spring 65 or the spring 12 of the electric lock body, and the lock shaft 62 returns to the locked position again. .
This return is different from the temporary unlocking using the key and the main unlocking in which the electric circuit as the monostable holding means of the electric lock body 6 is energized for unlocking.

As a result, when the door A is closed even during a power failure,
When the key 13 inserted in the keyhole 1 is rotated to the locking position, the operating lever 2 is not in a position facing the escape link 9 when the door is closed, and therefore the unlocking operation is not performed by the door closing operation. Also, when the key is rotated to the unlocked position,
Since the operating lever 2 is in a position facing the escape link 9 when the door is closed, the operating lever 2 hits the engaging projection 91 of the escape link when the door is closed, but the escape link swings around the pin 10 and moves backward. Therefore, the locked state is not changed to the unlocked state. Even when the door is closed with the key removed, the door is similarly locked.

Therefore, even if the door is closed with the key being in the unlocked position, it will not be unlocked, and when removing the key, it can be removed by rotating it to the right. It will not be accidentally unlocked even when pulled out. When it is desired to open the door again after closing the door, the key can be unlocked by rotating the key rightward from the unlocked position to the locked position and then again rotated leftward to the unlocked position.

[0032]

As described above, according to the door locking device of the present invention, the door in the locked state is temporarily unlocked by using the key, and for example, the baggage is taken from the inside of the main body or is moved to the main body. After depositing your luggage, the key will be locked even if you close the door while the key remains in the unlock position, and if you want to unlock again,
Since the key can be unlocked only after turning the key in the opposite direction to the unlocking condition, it is possible to prevent the door from being left in the closed state while being unlocked due to an erroneous operation, and the reliability of the locking device is significantly improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a door to which a lock device according to the present invention is attached and a main body in an open state.

FIG. 2 is an exploded perspective view of a lock device.

FIG. 3 is an electric circuit diagram showing an example of monostable holding means.

FIG. 4 is a vertical cross-sectional side view in a closed state.

FIG. 5 is a front view in vertical section showing the configuration of the main body side.

[Explanation of symbols]

 A door B main body 1 keyhole 2 operating lever 3 latching plate 4 opening 5 peripheral wall 6 electric lock main body 61 solenoid 62 lock shaft 65 return spring 7 guide plate 71, 72 guide pin 73 guide slit 8 link member 81 connecting portion 82 extension portion 9 Escape link 91 Engagement protrusion 13 Key

Claims (3)

[Claims] 1. An electric lock main body having a monostable holding means for holding either the locked state or the unlocked state on the driven side, and the locked state of the electric lock main body is temporarily unlocked by inserting and turning a key. The temporary unlocking means and the lock shaft of the electric lock body are connected to each other, and the temporary unlocking action of the temporary unlocking means moves the lock shaft to the unlocking position against the restoring force to open the door. A locking device for the door, which comprises an engaging means for releasing and returning the lock shaft by means of the above. 2. An electric lock body having a monostable holding means,
2. The door locking device according to claim 1, which is a monostable latching solenoid. 3. A latching plate engaged with a lock shaft of a monostable latching solenoid is a plate projecting rearward from a door, the plate being inserted into a hole of a main body to which the door is attached, The door locking device according to claim 2, further comprising a hole that is engaged with the lock shaft.