JP2001241238A - Locking and unlocking device and its operating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking and unlocking device capable of being operated under the state of double locking as required from the outdoor side while being able to be locked and unlocked by one thumb-turn from the indoor side. SOLUTION: In the locking and unlocking device 1 in which a lock member forwarded and retracted from the front end face of a door 3 is installed to a lock box A disposed to the door 3, the first cylinder lock 5 forwarding and retracting the lock member by operation by a key from the outdoor side, a sliding plate 25 preventing the rotation of the first cylinder lock 5 at one sliding place and freely rotating the first cylinder lock 5 at the other sliding place, the second cylinder lock 7 moving the sliding plate 25 to one sliding place or the other sliding place by operation by the same key as the key from the outdoor side, and the thumb-turn 45 forwarding and retracting the lock member by rotary operation from the indoor side and conducting locking and unlocking while moving the sliding plate 25 at one sliding place to the other sliding place in the case of unlocking are mounted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking / unlocking apparatus having one thumb turn on the indoor side and two cylinder locks on the outdoor side and a method of operating the same.

[0002]

2. Description of the Related Art A so-called one-door two-lock system, in which two locks are provided on one door, has conventionally been employed in a locking / unlocking device in order to improve security performance. Conventionally, this one-door two-lock system generally has a configuration in which two cylinders are mounted on the outdoor side and two thumb-turns are mounted on the indoor side, that is, two locking / unlocking devices each functioning independently are provided. In such a conventional locking / unlocking device, various locks can be provided at the locking position, so that it is difficult to pry open with a bar or the like, and the security performance can be enhanced.

[0003]

However, the above-described conventional locking / unlocking device can provide various locks at the locking position, so that it is resistant to prying with a bar or the like, but has two thumb turns or two cylinder locks. Must be operated twice, that is, twice when locking and unlocking, respectively, which is troublesome.

The present invention has been made in view of the above circumstances, and a locking / unlocking device and a locking / unlocking device which can be operated from the outdoor side to a double lock state as required, while the indoor side can perform a locking / unlocking operation with one thumb turn. An object of the present invention is to provide an operation method, thereby simultaneously improving security performance and convenience.

[0005]

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. The locking / unlocking device 1 according to claim 1 of the present invention.
Is provided on the outdoor side of the lock box A in the locking and unlocking device 1 provided with a lock member slidably provided on the lock box A provided on the door 3 and advanced and retracted from the front end surface of the door 3. A first cylinder lock 5 for unlocking the lock member by operating the key 9 from the outdoor side by operating the key 9 and a rotation of the first cylinder lock 5 at one slide position provided on the outdoor side of the lock box A. And a slide plate 25 for rotatably rotating the first cylinder lock 5 at the other slide position, and a slide plate 2 provided on the outdoor side of the lock box A by operation of the key 9 from the outdoor side.
And a second cylinder lock 7 for moving the lock member 5 to the one slide position or the other slide position, and a lock operation which is provided on the indoor side of the lock box A by rotating the lock member from the indoor side to unlock and unlock. And at the time of unlocking, the slide plate 2 in the one slide position
Thumb turn 4 for moving 5 to the other slide position
5 is provided.

In this locking / unlocking device 1, when locking from the outdoor side, only the first cylinder lock 5 is operated with the key 9, whereby the lock member is advanced and retracted to perform locking and unlocking. That is, in this case, a single lock as a normal locking / unlocking device is possible. Further, when the second cylinder lock 7 is operated from the outdoor side with the same key 9 as the key 9 in the single lock state, the slide plate 25 slides to one of the slide positions for preventing the rotation of the first cylinder lock 5. Thus, the first cylinder lock 5 cannot be unlocked by directly operating the key. That is, a double lock state is set. To unlock the locking / unlocking device 1 in the double lock state from the outdoor side, first, the second cylinder lock 7 is operated by the key 9. When the key operation of the second cylinder lock 7 is performed, the slide plate 25 is moved to the other slide position, and the rotation inhibition of the first cylinder lock 5 is released. As a result, the single cylinder lock 5 is again brought into the single lock state only, and the unlocking device 1 can be unlocked by unlocking the first cylinder lock 5 with the key 9. On the other hand, to unlock the locking / unlocking device 1 in the double lock state from the indoor side, the thumb turn 45 is rotated.
When the thumb turn 45 is rotated, the slide plate 25 is moved to the other slide position simultaneously with the retraction of the lock member, and the locking and unlocking device 1 is unlocked at once from the double lock state.

According to a second aspect of the present invention, there is provided a method for operating a locking / unlocking device, comprising: a locking member provided slidably with respect to a lock box provided on a door and advanced and retracted from a front end face of the door. In the operation method of the lock device 1, the first cylinder lock 5 is operated from the outdoor side with the key 9 to protrude the lock member to lock the lock into a single lock. By operating the two-cylinder lock 7 with the key 9, the first cylinder lock 5
The key operation of the first cylinder lock 5 is performed by operating the second cylinder lock 7 with the key 9 to perform the double lock operation by disabling the key operation and unlocking from the outdoor side in the double lock state. After the inoperable state is released, the first cylinder lock 5 is operated with the key 9 to retract the lock member and unlock, or the double lock state is unlocked from the indoor side by a thumb turn. 45. The operation of retracting and unlocking the lock member by only the rotation operation of 45.

In the operation method of the locking / unlocking device 1, the key operation of the first cylinder lock 5 becomes impossible by operating the second cylinder lock 7 with the key 9 from the outdoor side after the single lock. At the time of unlocking from the outdoor side, the keys of the second cylinder lock 7 are operated, and the keys cannot be operated of the first cylinder lock 5 unless the key operation disabled state of the first cylinder lock 5 is released. That is, a double lock state is set from the outdoor side. On the other hand, at the time of unlocking from the indoor side in the double lock state, the lock member retreats and is unlocked only by rotating the thumb turn 45. Therefore, it is possible to unlock the double lock by an easy operation similar to the single lock state without performing a complicated double release operation. Thus, the single lock and the double lock can be selected from the outdoor side as needed. By this, for example, when unlocking is scheduled in a short time,
A single lock that emphasizes operability can be selected. Further, when the locked state is maintained for a long time, a double lock with an emphasis on crime prevention can be selected.

The operation method of the locking and unlocking device 1 according to the third aspect is characterized in that when the first cylinder lock 5 is in the unlocked state, the second cylinder lock 7 cannot be operated by the key 9.

According to the operation method of the locking and unlocking device 1, when the first cylinder lock 5 is in the unlocked state, the key operation of the second cylinder lock 7 is disabled. That is, the key operation of the second cylinder lock 7 is enabled only when the first cylinder lock 5 is in the locked state. This prevents an erroneous operation of operating the second cylinder lock 7 by mistake when a single lock is desired.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a locking / unlocking device and an operation method thereof according to the present invention will be described below in detail with reference to the drawings. 1 is a longitudinal sectional view of the locking / unlocking device according to the present invention, FIG. 2 is a front view of the pedestal unit of FIG. 1 viewed from the indoor side, FIG. 3 is a view taken along the line II in FIG. 2, and FIG. It is a principal part disassembled perspective view of a lock device.

As shown in FIG. 1, the locking and unlocking device 1 includes a door 3
, A pedestal unit C attached to the lock box A on the outdoor side, and a thumb turn unit D attached to the lock box A on the indoor side.

The lock box A is built in, for example, an end of the door 3,
A front plate (not shown) fixed to the lock box A is attached to the door 3 at the opening (front end surface) of the door 3. A lock member (not shown) is built in the lock box A. The lock member slides with respect to the lock box A by operation of a first cylinder lock 5 and a thumb turn 45 described later, and is advanced and retracted from the front plate of the door 3. That is, it is possible to lock and unlock the door frame. Here, the description of the specific mechanism is omitted.

The locking member includes a guard bolt which is engaged with a guard arm attached to the door frame side and performs the same function as a door chain, a dead bolt serving as a main locking means, and an arc-shaped movable locus. It includes a camadet that is drawn and protruded, a locking means that advances and retreats from the upper end surface or the lower end surface of the door 3 and engages with the door frame.

The pedestal unit C has a first cylinder lock 5
And the second cylinder lock 7 are provided vertically. first,
In the second cylinder locks 5, 7, the insertion opening of the key 9 shown in FIG. 4 is exposed to the outside, while the rotation shafts 11, 13 of FIG. ing. The first and second cylinder locks 5 and 7 are rotated by the same key 9.

The keys 9 include an owner key 9 and, for example, a conkey (not shown). The consky is formed by a shorter and less protruding and recessed groove (key groove) 9 a than the owner key 9. Conskies are used for closing doors during construction during the construction period before delivery of the building. This consky will be owned by the owner key 9 after delivery.
Is used, a cylinder that cannot be handled by a small number of keyways is operated, and thus cannot be used for unlocking.

A stopper Dharma 15 is fitted to the rotation shaft 11 of the first cylinder lock 5 so as to be relatively non-rotatable, and the stopper Dharma 15 rotates integrally with the rotation shaft 11. As shown in FIG. 6, the stopper darma 15 is provided with a projection plate 15a projecting in the axial direction and an engagement plate 15b projecting in the radial direction from the circumference. The first cylinder lock 5 has a protruding plate 15a protruding into the lock box A, and the protruding plate 15a rotated by the rotating shaft 11 allows the lock member to advance and retreat from the lock box A via a mechanism in the lock box A. I have.

A reset darma 17 is fitted around the outer periphery of the stopper darma 15 so as to be relatively rotatable. As shown in FIG. 7, the reset dharma 17 is provided with a pair of protrusions 17a, 17a projecting in the axial direction and a reset plate 17b projecting radially from the circumference. The reset dharma 17 is formed in an annular shape, and the projection plate 15a of the stopper dharma 15 is inserted into a hole 17c opened at the center.

A sub-dharma 19 is fitted to the rotary shaft 13 of the second cylinder lock 7 so as not to rotate relatively, and the sub-dharma 19 rotates integrally with the rotary shaft 13. As shown in FIG. 8, a pair of regulating arms 1 projecting from the circumference in the diametrical direction
9a and 19b are provided. A small protrusion 19 protruding in the same direction as the axis of the
c is provided.

The pedestal unit C has a recess 21 shown in FIG. The above-mentioned stopper dharma 15, reset dharma 17, sub dharma 19
Are arranged in the recess 21. A bottom surface of the concave portion 21;
Bottom plate 23 is located between these darmas 15, 17, and 19.
Is provided. On the bottom plate 23, as shown in FIG.
Notch 23a along the circumference of stopper dharma 15, hole 23b along the circumference of sub dharma 19, and shaft hole 23c
And a pair of left and right long holes 23d, 23d, and a pair of notches 23e, 23e located on both side edges.
The bottom plate 23 is formed with the recesses 2 by the screw holes 23f at the four corners.
1 is immovably fixed to the bottom.

As shown in FIG. 3, a slide plate 25 is provided in parallel between the bottom plate 23 and the lock box A. The slide plate 25 is slid on both side edges on the inner wall of the concave portion 21 and is slidable vertically in the concave portion 21 (vertical direction in FIG. 2). In this specification, the slide position above the slide plate 25 (the position shown in FIG. 15) is one slide position, and the slide position below the slide plate 25 (the position shown in FIG. 2).
Is referred to as the other slide position.

As shown in FIG. 9, the slide plate 25
An escape portion 25a along the rotation trajectory of the reset plate 17b is cut out at the upper side. A click shaft loose fitting groove 25b is cut out at the lower center of the escape portion 25a. The slide plate 25 prevents the rotation of the first cylinder lock 5 by engaging the click shaft loose fitting groove 25b with the engagement plate 15b of the stopper darma 15 at one slide position shown in FIG. At the slide position, the engagement between the click shaft loose fitting groove 25b and the stopper darma 15 is released to make the first cylinder lock 5 rotatable.

On the left and right sides of the slide plate 25,
Each of the arm grooves 25c, 25c is cut out.
The sub-dharma 1 is provided on the lower side of the slide plate 25.
The central notch 25d along the circumference of No. 9 is notched. A groove 25e is continuously cut at the left part of the center notch 25d, and a small projection groove 25f is continuously cut at the right part. The slide plate 25 has a spring pin hole 25g and a pair of arm pin holes 25h, 25h. Further, the slide plate 25 is formed with a pair of cut-and-raised portions 25j, 25j standing up toward the bottom plate 23. The slide plate 25 is moved to one of the slide positions or the other slide position when the small protrusion grooves 25f are pressed by the small protrusions 19c of the sub-dharma 19. The vertical width of the small projection groove 25f is a width corresponding to an angle of 45 ° in the rotation angle of the sub-dharma 19.

The slide plate 2 is inserted into the spring pin hole 25g.
The click spring pin 27 shown in FIG. 11B is fitted from the surface of the bottom plate 23 side of FIG. 5 (see FIG. 2). In the concave portion 21 of the pedestal unit C, a cylindrical click shaft 29 shown in FIG. 11A is provided upright through the shaft hole 23c and the click shaft loose fitting groove 25b. The click shaft 29 supports one end of a click spring 31 shown in FIG.
Is supported by a click spring pin 27. That is, the click spring 31 is disposed between the pedestal unit C and the slide plate 25, and urges the slide plate 25 to one slide position or the other slide position.

The arm pins 33 shown in FIG. 11C are fitted into the pair of arm pin holes 25h from the surface on the bottom plate 23 side of the slide plate 25, respectively. Each arm pin 33 has an arm 3 shown in FIGS.
4, 35 are rotatably supported. That is, the arms 34 and 35 are moved integrally with the slide plate 25. The arms 34 and 35 are provided with spring seats 34a and 35a and rotation restricting projections 34b and 35b.

An arm spring 37 shown in FIG. The arm spring 37 has one end hooked to the cut-and-raised 25j, and the other end having a spring seat 34a,
35a. Each arm 34, 35
The tip of the slide plate 25 is moved by the arm spring 37
Is biased to rotate in the center direction. The rotation of the arms 34 and 35 is regulated at a predetermined position by the rotation regulating protrusions 34b and 35b abutting on the arm grooves 25c of the slide plate 25. Further, each arm 34, 3
5 is formed in the shape of a hook, as shown in FIG.
The sliding contact pin 36 shown in FIG. The sliding contact pins 36 provided on the respective arms 34 and 35
When the arms 4 and 35 are urged by the arm spring 37,
It comes into sliding contact with the notch 23e of the bottom plate 23,
The hook-like tips 34c, 35c of the arms 34, 35 are adapted to engage with the regulating arms 19b, 19a of the sub-dharma 19.

Stopper Dharma 15, Reset Dharma 1
7, the sub-dharma 19, the bottom plate 23, and the recess 21 in which the slide plate 25 is accommodated are provided with a cover plate 39 shown in FIG.
Blocked by. The cover plate 39 has an upper hole 39a for exposing the stopper dharma 15 and the reset dharma 17, a lower hole 39b for exposing the sub dharma 19,
A fixing hole 39c corresponding to the hollow hole of the click shaft 29 and a mounting hole 39d are formed. Cover plate 39
Is fixed to the pedestal unit C by a countersunk screw 41 inserted in the fixing hole 39c and a screw inserted in the mounting hole 39d, as shown in FIG.

As shown in FIG. 1, the thumb turn unit D
Is a thumb turn 45 that exposes the knob 45a to the indoor side.
Are provided rotatably. Knob 45 of Samturn 45
A shaft 45b projecting into the lock box A is fixed to a. By rotating the thumb turn 45, the mechanism in the lock box A is operated via the shaft 45b, and the lock member is advanced and retracted from the front plate of the door 3 to enable locking and unlocking. Further, the rotation of the shaft 45b in the unlocking direction is transmitted to the reset dharma 17 via a mechanism in the lock box A. That is, the upper side of the slide plate 25 is in contact with the reset plate 17b of the reset darma 17 rotated by the thumb turn 45, and is moved from one slide position to the other slide position.

Next, the locking / unlocking device 1 configured as described above.
The operation of will be described. [Regarding the operation from the indoor side] Regarding the locking / unlocking operation by the thumb turn 45, the locking / unlocking operation can be performed by a 45 ° rotation and a 90 ° rotation.
The operation by the thumb turn 45 is performed by the key 9 from the outdoor side.
Irrespective of the single lock or double lock state of the first cylinder lock 5 and the second cylinder lock 7 (outdoor cylinder).

According to the operation of the thumb turn 45, FIG.
Even in the double lock state shown in FIG. 5, the reset plate 17b of the reset dharma 17 presses the upper side of the slide plate 25, moves the slide plate 25 to the other slide position, and unlocks the second cylinder lock 7. At the same time, unlock the first cylinder lock. In the unlocked state, as shown in FIG. 12, the reset plate 17b comes into contact with the escape portion 25a of the slide plate 25, that is, the slide plate 25 is not moved upward and is maintained at the other slide position. The second cylinder lock 7
Operation becomes impossible.

[Regarding Operation from Outdoor Side] Double lock: A mechanism requiring two operations of locking and unlocking (crime prevention-oriented type) (i) First, the first cylinder lock 5 of the locking and unlocking device 1 is locked with the key 9. The locking and unlocking device 1
As shown in FIG. 13, when the first cylinder lock 5 is in the locked state and the second cylinder lock 7 is in the single lock state in which the second cylinder lock 7 is not operated, the second cylinder lock 7 is
When rotated (counterclockwise in the figure), the small projection 19c of the sub-dharma 19 is turned into the small projection groove 25, as shown in FIG.
f, and slides up the slide plate 25, as shown in FIG.
It becomes the double lock state shown in. At this time, as the slide plate 25 moves upward, the arm 35 is
Is retracted by sliding with the notch 23e.

When the key 9 is removed from the second cylinder lock 7 by turning it back by 45 °, the restricting arm 19b of the sub-dharma 19 is moved forward by the urging force of the arm spring 37. 34c. Thereby, further rotation (counterclockwise direction in FIG. 15) of the second cylinder lock 7 connected to the sub-dharma 19 is restricted. In this double lock state, the rotation shaft 11 of the first cylinder lock 5 is
The rotation of the first cylinder lock 5 cannot be operated by the engagement of the click shaft play fitting groove 25b of the slide plate 25 at the one slide position with the click shaft b.

(Ii) In the unlocking operation from the double lock state, first, the second cylinder lock 7 is rotated by 45 ° in the opposite direction (clockwise in FIG. 15). Then
The sub-dharma 19 moves the slide plate 25 to the other slide position (downward in the figure) shown in FIG. 16, and the lock on the first cylinder lock 5 is released. That is, a single lock state is established, and the state shown in FIG.
In this case, the second cylinder lock 7 is
As a result, the second cylinder lock 7 connected to the sub-dharma 19 is further restricted from rotating (clockwise in FIG. 13). .

(Iii) Therefore, the operation of (ii) allows the first cylinder lock 5 to be released from the restriction of the stopper darma 15 from the slide plate 25 and to be unlocked. By operating the first cylinder lock 5, unlocking is performed.

(Iv) Therefore, in order to make the double lock state again, the operation of (i) for locking the first cylinder lock 5 with the key 9 is performed.

2. Single lock: A mechanism that can be unlocked by one operation (operability-oriented type) (i) When the second cylinder lock 7 is switched to the single lock at the time of double lock, or unlocked (or guard locked) by the thumb turn 45 In such a case, the outdoor side cylinder is in a single lock state. That is, in the state where the slide plate 25 is at the other slide position (downward in the figure), the single lock can always be performed.

(Ii) In this single lock state, the switching operation to the double lock by the second cylinder lock 7 from the outdoor side, that is, the slide plate 25 is moved to one slide position (upward in the figure) by the key 9. It will be kept unless the operation is performed. In this state, the first cylinder lock 5 has the same key 9 as the normal one cylinder lock.
To perform the locking and unlocking operation.

As described above, in the locking / unlocking device 1 described above, when locking from the outdoor side, only the first cylinder lock 5 is operated by a key, so that the lock member is advanced and retracted to perform locking and unlocking. That is, in this case, a single lock as a normal one-cylinder lock is possible. When the key of the second cylinder lock 7 is operated from the outdoor side in the single lock state, the slide plate 25 is slid to one of the slide positions for preventing the rotation of the first cylinder lock 5, and the first cylinder lock 5 is directly moved. , And a double lock state where unlocking by key operation is impossible.

In order to unlock the double-locking unlocking device 1 from the outdoor side, first, the second cylinder lock 7 is operated with the key 9. When the key operation of the second cylinder lock 7 is performed, the slide plate 25 is moved to the other slide position, and the rotation inhibition of the first cylinder lock 5 is released. As a result, the single cylinder lock 5 becomes the single lock state again, and the first cylinder lock 5 is
The unlocking operation of the locking and unlocking device 1 can be performed by performing the unlocking operation.

On the other hand, to unlock the locking / unlocking device 1 in the double locked state from the indoor side, the thumb turn 45 is rotated. When the thumb turn 45 is rotated, the slide plate 25 is moved to the other slide position simultaneously with the retraction of the lock member, and the locking and unlocking device 1 is unlocked at once from the double lock state.

Therefore, according to the locking and unlocking device 1, the double lock state can be operated from the outdoor side as required,
From the indoor side, the locking / unlocking operation can be performed with one thumb turn, so that it is possible to simultaneously improve security performance and convenience.

[0042]

As described above in detail, the locking / unlocking device according to the present invention comprises a first cylinder lock for moving the lock member forward and backward by a key operation from the outdoor side, and a first cylinder lock for one slide position. A slide plate that prevents rotation and makes the first cylinder lock rotatable at the other slide position, and a second cylinder lock that moves the slide plate to one slide position or the other slide position by key operation from the outdoor side And a thumb turn that moves the slide plate at one slide position to the other slide position when unlocking by moving the lock member forward and backward by a rotation operation from the indoor side and unlocking the first cylinder. Single lock can be performed by key operation of lock only, and key operation of second cylinder lock in single lock state More, it can be performed double lock. Thereby, the operation to the double lock state can be performed from the outdoor side as needed. On the other hand, from the indoor side, locking and unlocking operations can be performed in one thumb turn. As a result, security performance and convenience in the locking and unlocking device can be simultaneously improved.

Further, the operating method of the locking / unlocking device according to the present invention is such that the single cylinder lock is operated by the key operation of the first cylinder lock from the outdoor side, and then the second cylinder lock is operated by the same key from the outdoor side. The key operation of the first cylinder lock becomes impossible, and when unlocking from the outside, the first cylinder lock must be released by releasing the key operation state of the first cylinder lock by key operation of the second cylinder lock. Since the key cannot be operated by the lock, it is possible to make it difficult to unlock from the outdoor side. On the other hand, at the time of unlocking from the indoor side in the double lock state, the locked state of the first cylinder lock and the second cylinder lock can be released only by the rotation operation of the thumb turn, and the lock member is retracted and unlocked, A complicated double release operation is not required, and the unlocking from the indoor side can be facilitated. As a result, security performance and convenience in the locking and unlocking device can be simultaneously improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a locking and unlocking device according to the present invention.

FIG. 2 is a front view of the pedestal unit of FIG. 1 as viewed from the indoor side.

FIG. 3 is a view taken along a line II in FIG. 2;

FIG. 4 is an exploded perspective view of a main part of the locking and unlocking device.

FIG. 5 is an enlarged perspective view of a bottom plate.

FIG. 6 is an enlarged perspective view of a stopper darma.

FIG. 7 is an enlarged perspective view of a reset dharma.

FIG. 8 is an enlarged perspective view of a sub dharma.

FIG. 9 is an enlarged perspective view of a slide plate.

FIG. 10 is an enlarged perspective view showing a left arm (a) and a right arm (b).

FIG. 11 is an enlarged side view showing various pins in (a) to (d).

FIG. 12 is a longitudinal sectional view of the locking and unlocking device according to the present invention in an unlocked state.

FIG. 13 is a longitudinal sectional view of the locking / unlocking device according to the present invention in a single lock state.

FIG. 14 is a longitudinal sectional view of the locking / unlocking device according to the present invention at the time of a double lock operation.

FIG. 15 is a longitudinal sectional view of the locking / unlocking device according to the present invention in a double locked state.

FIG. 16 is a longitudinal sectional view of the locking / unlocking device according to the present invention when the double lock is released.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Locking / unlocking device 3 ... Door 5 ... First cylinder lock 7 ... Second cylinder lock 9 ... Key 25 ... Slide plate 45 ... Thumb turn A ... Lock box

Claims (3)

[Claims] 1. A locking / unlocking device provided with a lock member slidably provided in a lock box provided on a door and advanced / retracted from a front end face of the door, wherein the lock device is provided on an outdoor side of the lock box and on an outdoor side. A first cylinder lock that moves the lock member forward and backward by operating with a key to perform locking and unlocking; a lock position provided on the outdoor side of the lock box that prevents rotation of the first cylinder lock at one slide position, A slide plate that allows the first cylinder lock to rotate freely at a slide position; and a slide plate provided on the outdoor side of the lock box and operating the key from the outdoor side to move the slide plate to the one slide position or the other slide. A second cylinder lock to be moved to a position, and the locking box is provided on the indoor side of the lock box, and the locking member is moved forward and backward by a rotating operation from the indoor side to perform locking and unlocking,
And a thumb turn for moving the slide plate at the one slide position to the other slide position at the time of unlocking. 2. A method of operating a locking / unlocking device having a lock member slidably provided in a lock box provided on a door and advanced and retracted from a front end surface of the door, comprising: An operation of projecting the lock member by operating with a key to lock the single cylinder lock, and after the single lock, operating the second cylinder lock from the outdoor side with the key to lock the first cylinder lock. The operation of disabling the key operation and double-locking and unlocking from the outdoor side in the double-locked state are performed by operating the second cylinder lock with the key and disabling the key operation state of the first cylinder lock. After release, the operation of the first cylinder lock with the key to retract the lock member to unlock the lock member, or unlock the double lock state from the indoor side, the rotation of the thumb turn An operation method of the locking and unlocking device, comprising: an operation of retracting the lock member only by an operation to unlock the lock member. 3. The method according to claim 2, wherein the key operation of the second cylinder lock is disabled when the first cylinder lock is in the unlocked state.