JPH0712563Y2 - Door lock device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a locking device for an opening / closing door, and in particular, it uses at least two key cylinders, and one of the key cylinders can only unlock. The present invention relates to a locking device for a door.

《Prior art》 In recent years, the courier business has been prosperous, but the resident at the delivery destination is often absent at the time of delivery.In such a case, leave a message at the delivery destination It is common to have a business office or the like come to pick up the deliverables, or to inform them of a convenient date and time for redelivery.

However, the delivery company has to store the undelivered deliverables, and the redelivery requires the delivery work twice, which is expensive.

On the other hand, it is not convenient for the recipient to go to the sales office to receive the delivered goods, and there is no merit as a courier service. It takes days to receive the.

Therefore, the following can be considered as a delivery system that can improve this.

In other words, this delivery system is particularly effective for condominiums and other condominiums, but if a storage cabinet is installed at the delivery destination and the recipient is absent at the time of delivery, the delivery items are stored in the storage cabinet. And lock the open / close door of the storage cabinet.

Then, a key for unlocking the opening / closing door of the storage cabinet is put in the recipient's doorpost, and the recipient then opens the storage cabinet with the key to receive the delivery.

However, the problem here is with respect to the storage of the key.

In other words, it does not make sense for the recipient to return the key to the nearest sales office after receiving the delivered item, or for the delivery person to go to collect it.

Therefore, for the locking device of the storage cabinet, use a mechanism that allows the key to be inserted into the key cylinder and once unlocked, so that the unlocked state is retained and the key cannot be removed. It is desirable to be able to easily store the key, and as a locking device having such a mechanism, a type adopted in a coin locker or the like has been well known.

<Problems to be solved by the invention> However, when adopting the delivery system as described above, if a lock device of the type conventionally used in a coin locker is used for the lock device of the storage cabinet, it is misused as a coin locker. It becomes necessary to use a dedicated coin in order to prevent the coin from being played, and the coin must be collected and rotated regularly, for example.

Further, not only is there a problem in terms of storage, such as a coin being easy to lose, but there is also a problem that it may cause a coin jam, etc., and it is more likely to be tampered with.

In view of such conventional problems, the present invention enables reliable storage of the key after the recipient receives the delivery from the storage cabinet, and then the storage cabinet can be securely stored again. It is an object of the present invention to provide a locking device for an opening / closing door that can open the door with another key and remove the key for the recipient when using the key.

<Means for Solving the Problem> In order to achieve such an object, the present invention is directed to a door biased by an elastic force in the opening direction and a latch for locking the door in the unlocking direction, and A first key cylinder in which the key is prevented from being pulled out at the unlocked position, and an unlocked state holding mechanism for maintaining the first key cylinder at the unlocked position at the unlocked position of the first key cylinder, A latch returning mechanism that automatically moves the latch to the locking position according to the setting of the first key cylinder to the unlocking position, and the first key cylinder is provided independently to unlock the latch. A second key cylinder movable in a direction, an unlocked state releasing mechanism that releases the unlocked state holding mechanism at an unlocked position of the second key cylinder, and sets the first key cylinder to a locked position, Latch in locked position when the door is closed Is temporarily moved in the unlocking direction, and unlocking force generating means for enabling the closing of the door is provided.

<Operation> With the locking device for the door according to the present invention having such a configuration, when the key is inserted into the first key cylinder and unlocked, the latch moves in the unlocking direction to open the door with elastic force. To be done.

Therefore, in this state, the recipient can receive the delivery item stored in the door.

Further, when the first key cylinder is unlocked, the first key cylinder is maintained at the unlocked position through the unlocked state holding mechanism, so that the key is prevented from being removed and the latch recovery mechanism is used. The latch is returned to the locked position.

When the recipient closes the door after receiving the delivered product, the latch temporarily moves in the unlocking direction through the unlocking force generating means, and then the door can be closed. Therefore, the first key is used. The door is locked when the key is inserted into the cylinder, and the key is stored in this state.

Next, to release the closed door in such a state, the second
By inserting the key possessed by the delivery person into the key cylinder and unlocking it, the latch moves in the unlocking direction and the door can be opened.

Then, in this state, since the unlocked state holding mechanism is released via the unlocked state releasing mechanism, the first key cylinder is set to the locked position and the key can be removed.

Therefore, the delivery person locks the door with the second key cylinder after storing the delivery item in the door, and delivers the key pulled out from the first key cylinder to the absentee.

<< Embodiment >> An embodiment of the present invention will be described in detail below with reference to the drawings.

1 to 12 show an embodiment of a locking device for an opening / closing door according to the present invention. In FIG. 12, 2 is a storage cabinet, and the front of the storage cabinet 2 is hinged to a cabinet body 4. Door 6 that can be opened and closed freely toward the front
Is attached.

The door 6 is urged in the opening direction with an elastic force through an urging means (not shown).

Further, a locking device 8 for locking the door 4 in a closed state is detachably attached to the cabinet body 6.

As shown in FIGS. 1 to 5, the locking device 8 has a base plate 10 bent in a U shape and a decorative plate 12 superposed on the base plate 10, and the base plate 10 is a cabinet body 4. It is inserted into the mounting opening 4a formed in the above and is detachably mounted.

Further, a lock key cylinder 14, a user key cylinder 16 as a first key cylinder, and a master key cylinder 18 as a second key cylinder are penetrating through the base plate 10 and the decorative plate 12 in a substantially straight line in the vertical direction. And the key cylinders are fastened and fixed by ring nuts (not shown).

The upper lock key cylinder 14 locks the locking device 8 so that it cannot be removed from the cabinet body 4. When the lock key cylinder 14 is set from the unlocked state of FIG. 6 to the locked state of FIG. The latch 20 attached to the rotary shaft 14a of the lock key cylinder 14 engages with the panel of the cabinet body 4 to prevent the locking device 8 from being removed.

The user key cylinder 16 at the center is for locking the door 6, and when the user key cylinder 16 is set in the locked state, the user key cylinder 16 is attached to the locking device 8 so as to be able to reciprocate, and the front end of the user key cylinder 16 projects from the locking device 8. The latch 22 is engaged with an engaging groove 6a (see FIG. 3) integrally formed on the door 6 side to lock the door 6 in a closed state.

The user key cylinder 16 is of a type in which the key 24 (see FIG. 2) cannot be removed when it is set in the unlocked state shown in FIG.

By the way, the user key cylinder 16 is provided with an unlocking state holding mechanism 26 for maintaining the unlocked state once it is set to the unlocked state and restricting the locking operation of the user key cylinder 16. To be

The locking restriction means 26 includes an engagement protrusion 28 that is rotated integrally with the rotating shaft 16a of the user key cylinder 16, and the engagement protrusion 2
And a first lever 30 that is detachably engaged with 8 and this first
An urging spring 32 for urging the lever 30 in the engaging direction.

The engagement projection 28 is integrally projected from the outer circumference of the first operation plate 36 which is fastened and fixed to the rotary shaft 16a of the user key cylinder 16 with the nut 34. As the user key cylinder 16 rotates, Is rotated.

The intermediate portion of the first lever 30 is the base plate.
One end 30 of this first lever 30 is rotatably pivotally attached to
“A” is arranged so as to face one side (the front side in FIG. 1) of the engaging projection piece 28, and the one end portion 30a is the biasing spring 3.
It is pressed by 2 in the direction in which it is engaged with the engaging protrusion 28.

That is, the user key cylinder 16 is in the locked position in the state shown in FIG. 1, and in this state, the one end portion 30a of the first lever 30 is located at the engaging protrusion 28 portion, and the user key cylinder 16 is in the first position. In the unlocking shown in Fig. 7, this one end 30a
Is adapted to be engaged with the step portion 28a of the engaging projection piece 28.

Therefore, the one end 30a of the first lever 30 has the engaging projection 2
In the state of being engaged with 8, the user key cylinder 16 is prevented from rotating in the locking direction (counterclockwise in FIG. 7).

The user key cylinder 16 is a coil spring.
It is urged to rotate in the locking direction by 37.

By the way, the latch 22 is the user key cylinder 16
Is arranged between the master key cylinder 18 and the master key cylinder 18, and the one end 22a is pressed and biased by the spring 38 in the direction in which it is projected from the locking device 8.

As shown in FIG. 3, an inclined surface 22a curved forward (downward in FIG. 3) is formed at one end of the latch 22, and this inclined surface 22a is used as unlocking force generating means.

Therefore, the slanted surface 22a is formed at the protruding end portion of the latch 22 so that the door 6 is kept in a state in which the latch 22 is projected.
When the door is closed, the tip corner portion of the door 6 is brought into contact with the inclined surface 22a, and the closing force of the door 6 is converted into a force for retracting the latch 22.

The other end of the latch 22 has an L-shaped protruding portion 22
A b is formed, and a first arm 36a integrally projecting from the first operation plate 36 of the user key cylinder 16 is locked on the right side of the locking portion 22b in FIG.

In addition, the rotary shaft 18a of the master key cylinder 18,
A second operation plate 40 is fastened and fixed via a nut 42, and a second arm integrally projected from the second operation plate 40.
40a is similar to the master first arm 36a, and the locking portion 22b
Locked in.

By the way, the user key cylinder 16 and the master key cylinder 18 are in the locked position in the state shown in FIG. 1, and in order to set the user key cylinder 16 to the unlocked position from this locked position, this is set in the timepiece in the figure. While rotating in the clockwise direction, to set the master key cylinder 18 to the unlocked position, rotate it in the counterclockwise direction in the figure.

By unlocking one of the user key cylinder 16 and the master key cylinder 18, the latch 22 can be moved in the retracted direction by the first arm 36a or the second arm 40a.

By the way, when the user key cylinder 16 is set to the unlocked position, when the user key cylinder 16 is further rotated from the state where the first arm 36a retracts the latch 22 completely, the first arm 36a is locked by the latch 22. It is adapted to be disengaged from the locking portion 22b.

Therefore, when the first arm 36a is disengaged from the locking portion 22b, the latch 22 is returned to the locked position by the urging force of the spring 38, and the first arm 36a is disengaged from the locking portion 22b. The structure described above and the spring 38 constitute a latch return mechanism 43.

The other end 30b of the first lever 30 is provided with a second lever as an unlocked state releasing mechanism that releases the unlocked state holding mechanism 26 when the master key cylinder 18 is set to the unlocked position. 44 are provided.

The second lever 44 has a linear portion 44 as shown in FIG.
It is formed in a substantially T shape by a and the protruding portion 44b, and an intermediate portion thereof is pivotally attached to the base plate 10 so as to be rotatable.

One end of the linear portion 44a is superposed on the other end 30b of the first lever 30 on the left side in the drawing, and the other end of the linear portion 44a has a stopper cut and raised from the base plate 10. 46 are arranged facing each other.

Further, the protruding portion 44b is pressed by the second arm 40a when the master key cylinder 18 is set to the unlocked position as shown in FIG. 8, and the second lever 44 is rotated clockwise in FIG. It is designed to be rotated.

Therefore, when the second lever 44 is rotated clockwise, the other end 30b of the first lever 30 is moved to the straight portion 4
Pressed at one end of 4a, the first lever 30 rotates from the state shown in FIG. 9 (the operating state of the unlocked state holding mechanism 26) to the state shown in FIG. 4 (rotation in the counterclockwise direction in the figure). Then, the unlocked state holding mechanism 26 is released.

In the unlocking device 8 of the present embodiment having the above-described configuration, first, the delivery person stores the delivery when there is no recipient in the storage cabinet 2 and the locking device 8 is in the initial state shown in FIG. Set to.

In this state, since the user key cylinder 16 is in the locked position, the key 24 can be removed, and the key 24 extracted from the user key cylinder 16 is posted in the recipient's door post or the like.

After that, the recipient who receives the key 24 inserts the key 24 into the user key cylinder 16 and releases the key in the unlocking direction (first
Rotate clockwise (in the figure) to retract the latch 22.

Then, when the latch 22 is retracted to some extent, the latch 22 is disengaged from the engaging groove 6a, and the door 6 is automatically opened by an urging means (not shown) with elastic force and the user key cylinder 16 is moved. When it is further rotated a little, the latch 22 is projected again via the latch return mechanism 43 as shown in FIG.

In this state, the recipient can take out the delivery from the storage cabinet 2, and after taking out the delivery, the door 6 is closed again.

When the door 6 is closed, the latch 22 is in a protruding state. However, since the inclined surface 22a is formed at the protruding portion of the latch 22, the closing force of the door 6 temporarily retracts the latch 22 and then the door 22 is closed. When 6 is completely closed, it projects and is engaged with the engaging groove 6a.

By the way, when the user key cylinder 16 is set to the unlocked position, one end portion 30a of the first lever 30 engages with the step portion 28a of the engaging protrusion 28 as shown in FIGS. Since the user key cylinder 16 is prevented from rotating to the locked position,
The key 24 cannot be removed.

Therefore, the key 24 can be stored in the user key cylinder 16 after the delivery is taken out.

After that, when the delivery person uses the storage cabinet 2 again, the locking device 8 is in the state shown in FIG. 7, but in this state, the master key (not shown) possessed by the delivery person is inserted into the master key cylinder 18 and released. Rotate in the lock direction (counterclockwise direction in Fig. 7).

Then, the latch 22 is retracted and unlocked as shown in FIG. 8, and the door 6 is automatically opened by the urging force, so that the delivery item can be stored in the storage cabinet 2.

By the way, when the master key cylinder 18 is set to the unlocked position shown in FIG. 8, the second arm 40a causes the second lever 4 to move.
As the second lever 44 rotates, the first lever 30 rotates in the direction in which the tip portion 30a is disengaged from the stepped portion 28a of the engaging projection 28 as shown in FIG. , Unlocked state holding mechanism 26
Is canceled.

Therefore, the user key cylinder 16 can be rotated in the locking direction and the latch 22 is retracted, so that the user key cylinder 16 is returned to the locking position by the urging force of the coil spring 37.

Then, after closing the door 6, the master key cylinder 18
When the lock is set to the locked state, the latch 22 is projected by the urging force of the spring 38, and the door 6 is locked.

Therefore, in this state, the initial state shown in FIG. 1 is set, and the key 24 can be removed from the user key cylinder 16, and as described above, the key 24 can be posted to the absent recipient.

Needless to say, the master key is extracted from the master key cylinder 18 and stored by the delivery person.

By the way, in the above embodiment, when the user key cylinder 16 is unlocked from the state shown in FIG. 1, after the door 6 is automatically opened by the elastic force of the biasing means by the movement of the latch 22 in the retracting direction, The first arm 36a is disengaged from the locking portion 22b of the latch 22 and the latch 22 is projected again. At this time, if this unlocking operation is performed with the door 6 held down, the door 6 is closed. Then, the first arm 36a is disengaged from the locking portion 22b, the latch 22 is engaged with the engaging groove 6a, and thereafter the door 6 cannot be opened.

Therefore, in this embodiment, the erroneous operation preventing mechanism 50 is incorporated in the locking device 8 in order to prevent such a state.

That is, as shown in FIGS. 10 and 11, the erroneous operation preventing mechanism 50 includes a third lever 52 whose one end is rotatably attached to the base plate 10, and the third lever 52 in the unlocking direction. The projecting portion 52b provided on the swing side end portion 52a of the third lever 52 is provided with a spring 54 for urging the base plate 10.
And, it is inserted into the opening 56 penetrating the decorative plate 12, and a predetermined amount (about 2 to 3 mm) is projected forward from the decorative plate 12.

The amount of protrusion of the protrusion 52b is substantially equivalent to the gap provided between the door 6 and the decorative plate 12 which are biased in the opening direction.

Incidentally, FIGS. 10 and 11 are shown with side views seen from a direction opposite to the side view shown in FIG.

Further, as shown in FIG. 1, the swing side end portion 52a of the third lever 52 can be engaged with the step portion 28c of the engaging projection piece 28 of the user key cylinder 16, and the projecting portion 52b is the door 6
When the third lever 52 is rotated from the state shown in FIG. 10 to the state shown in FIG. 11 by being pushed into the opening 56 by the pressing plate 58 fixed to the rocking side end 52a, Is engaged with.

Therefore, when the third lever 52 is engaged with the stepped portion 28c in this way, the unlocking operation of the user key cylinder 16 is blocked, so that the door 6 is locked in the closed state as described above. Occurrence of malfunction can be prevented.

The cutout portion 28b formed in the engagement projection 28 is provided on the swing side end of the third lever 52 when the user cylinder 16 is held in the unlocked state as shown in FIGS. 7 and 8. This is for preventing the portion 52a from interfering with the engagement protrusion 28.

<< Effects of the Invention >> As described above, in the door locking device according to the present invention, the first key cylinder that prevents the key from being removed at the unlocked position, and the first key cylinder that is independent of the first key cylinder. Since the unlocked position of the first key cylinder is maintained by the unlocked state holding mechanism, the key of the first key cylinder is inserted into the key cylinder after the recipient takes out the delivery. Can be stored in the state.

On the other hand, when the delivery person again stores another delivery item from the key storage state of the first key cylinder, by inserting the master key into the second key cylinder and setting the unlocked state,
Since the first key cylinder can be set to the locked state by the unlocked state releasing mechanism, the key can be taken out from the first key cylinder and can be posted to the recipient.

Further, when the first key cylinder is set to the unlocked position when the delivery is taken out, the latch is automatically returned to the locking position by the latch returning mechanism, so that the door can be closed after the delivery is taken out. Therefore, the door can be closed in the locked state via the unlocking force generating means.

That is, in the lock device of the present invention, the door can be closed and locked by the recipient after receiving the delivery, and the first key cylinder of the first key cylinder used as the user key in the closed state of the door. The key can be stored while being inserted into the first key cylinder.

Therefore, it is possible to simplify the subsequent storage of the user key entrusted to the recipient and prevent the door from being left in the open state after the delivery item is taken out. Can be prevented.

Further, since the second key cylinder is used only as a master key cylinder, the same second key cylinder can be used for a large number of storage cabinets. Therefore, the key management of this second key cylinder is required. Not only is it easy to carry out, but it also has various excellent effects in that it can prevent damage such as mischief as much as possible compared with the conventional coin-type locking device.

[Brief description of drawings]

1 is a rear view showing an embodiment of a door locking device according to the present invention, FIG. 2 is a left side sectional view of the same embodiment, FIG. 3 is a bottom view of the same embodiment, and FIG. FIG. 5 is a front view of the same embodiment, FIG. 5 is a front view of the same embodiment, FIG. FIG. 8 is a rear view showing an operating state of the same embodiment, FIG. 8 is a rear view of an essential portion showing an operating state of the embodiment, FIG. 9 is a left side sectional view showing an operating state of the embodiment, and FIG. FIG. 11 is a right side sectional view corresponding to FIG. 10 showing an operating state of the same embodiment, and FIG. 12 is a perspective view of a storage cabinet to which the locking device of the same embodiment is attached. 2 ... Storage cabinet 6 ... Door 8 ... Locking device 16 ... First key cylinder 18 ... Second key cylinder 22 ... Latch 22a ... Inclined surface (unlocking force generating means) 24 ... Key 26 ... … Unlocked state retention mechanism 43 …… Latch return mechanism 44 …… Second lever (Unlocked state release mechanism)

Claims (1)

[Scope of utility model registration request] 1. A door urged by an elastic force in the opening direction and a latch for locking the door in the unlocking direction, and the key is prevented from being pulled out at the unlocking position.
A key cylinder, an unlocked state holding mechanism for maintaining the first key cylinder in the unlocked position at the unlocked position of the first key cylinder, and setting the first key cylinder in the unlocked position. A latch return mechanism that automatically moves the latch to the locking position; a second key cylinder that is provided independently of the first key cylinder and is capable of moving the latch in the unlocking direction; and the second key. An unlocked state release mechanism that releases the unlocked state holding mechanism at the cylinder unlocked position to set the first key cylinder to the locked position, and a latch in the locked position once unlocked when the door is closed. And an unlocking force generating means for moving the door to the door and closing the door.