JP3877197B2 - Locking / unlocking device and operation method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a locking / unlocking device including one thumb turn on the indoor side and two cylinder locks on the outdoor side, and an operation method thereof.
[0002]
[Prior art]
In order to improve crime prevention performance, a so-called one-door two-lock system in which two locks are provided on one door is conventionally employed for the locking / unlocking device. Conventionally, this one-door two-lock system is generally configured to have two cylinders on the outdoor side and two thumb turns on the indoor side, that is, two locking / unlocking devices each functioning independently.
Such a conventional locking / unlocking device can be provided with various locks at the locking location, making it difficult to pry by bar or the like and improving the crime prevention performance.
[0003]
[Problems to be solved by the invention]
However, since the conventional locking and unlocking device described above can be provided with various locks at the locking location, it is strong against prying with a bar or the like, but two thumbturns or two cylinder locks are operated respectively, that is, during locking. The operation must be performed twice at the time of release and at the time of release, which is complicated.
[0004]
The present invention has been made in view of the above situation, and provides a locking / unlocking device that can be operated from the outdoor side to a double-locked state as needed, and that can be locked / unlocked with a single thumb turn from the indoor side, and an operation method thereof. The purpose is to provide improved security performance and convenience at the same time.
[0005]
[Means for Solving the Problems]
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 with a lock member that is slidable with respect to a lock box A disposed on the door 3 and is advanced and retracted from the front end surface of the door 3. In
A first cylinder lock 5 which is provided on the outdoor side of the lock box A and performs locking and unlocking by advancing and retracting the lock member by an operation with the key 9 from the outdoor side;
A slide plate 25 provided on the outdoor side of the lock box A to prevent the rotation of the first cylinder lock 5 at one slide position and to rotate the first cylinder lock 5 at the other slide position;
A second cylinder lock 7 which is provided on the outdoor side of the lock box A and moves the slide plate 25 to the one slide position or the other slide position by an operation with the key 9 from the outdoor side;
The lock box A is provided on the indoor side, and the lock member is moved forward and backward by a rotation operation from the indoor side to perform locking and unlocking. At the time of unlocking, the slide plate 25 in the one slide position is moved to the other slide position. Thumb turn 45 to move to,
It is characterized by comprising.
[0006]
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 / 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 slide position where the rotation of the first cylinder lock 5 is prevented. As a result, the first cylinder lock 5 cannot be unlocked by directly operating the keys. That is, it becomes a double lock state. In order to unlock the locking / unlocking device 1 in the double-locked state from the outdoor side, first, the second cylinder lock 7 is operated with the key 9. When the second cylinder lock 7 is operated by key operation, the slide plate 25 is moved to the other slide position, and the rotation prevention of the first cylinder lock 5 is released. As a result, the single cylinder lock 5 is brought into the single lock state again, and the unlocking device 1 can be unlocked by unlocking the first cylinder lock 5 with the key 9.
On the other hand, in order 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 / unlocking device 1 is unlocked at once from the double lock state.
[0007]
The operation method of the locking / unlocking device 1 according to claim 2 is provided with a lock member that is slidable with respect to the lock box A disposed on the door 3 and that is advanced and retracted from the front end surface of the door 3. In the operation method of
An operation of projecting the locking member by operating the first cylinder lock 5 with the key 9 from the outdoor side and locking the single lock;
After the single lock, an operation of disabling the key operation of the first cylinder lock 5 by operating the second cylinder lock 7 with the key 9 from the outdoor side and double-locking;
For unlocking from the outdoor side in the double-locked state, the second cylinder lock 7 is operated with the key 9 to release the state in which the first cylinder lock 5 cannot be operated, and then the first cylinder lock is released. 5 is operated by the key 9 and the lock member is retracted and unlocked, or for unlocking from the indoor side in the double lock state, the lock member is retracted only by rotating the thumb turn 45. Operation to unlock,
It is characterized by including.
[0008]
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 second cylinder lock 7 is key-operated, and the first cylinder lock 5 cannot be key-operated unless the key-cylinder disabled state of the first cylinder lock 5 is released. That is, from the outdoor side, it becomes a double lock state.
On the other hand, when unlocking from the indoor side in the double lock state, the lock member is retracted and unlocked only by the rotation operation of 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, from the outdoor side, a single lock and a double lock can be selected as necessary. Thereby, for example, when unlocking is scheduled in a short time, it is possible to select a single lock with an emphasis on operability. In addition, when locked for a long period of time, a double lock that emphasizes crime prevention can be selected.
[0009]
The operation method of the locking / unlocking device 1 according to claim 3 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.
[0010]
In the operation method of the locking / unlocking device 1, when the first cylinder lock 5 is in the unlocked state, the second cylinder lock 7 cannot be operated by the keys. That is, the second cylinder lock 7 can be operated by keys only when the first cylinder lock 5 is locked. This prevents an erroneous operation in which the second cylinder lock 7 is erroneously operated when a single lock is desired.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a locking / unlocking device and an operation method thereof according to the invention will be described in detail with reference to the drawings.
1 is a longitudinal sectional view of a 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. It is a principal part disassembled perspective view of a locking device.
[0012]
As shown in FIG. 1, the locking / unlocking device 1 includes a lock box A disposed on the door 3, a pedestal unit C attached to the lock box A on the outdoor side, and a lock box A on the indoor side. It is roughly divided into the thumb turn unit D to be attached.
[0013]
The lock box A is built in, for example, an end portion of the door 3, and a front plate (not shown) fixed to the lock box A is attached to the door 3 so as to be exposed at the mouth (front end surface) of the door 3. A lock member (not shown) is built in the lock box A. This lock member is slid with respect to the lock box A by an 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, the door frame can be locked and unlocked. Here, a description of the specific mechanism is omitted.
[0014]
The lock member includes a guard bolt that locks on a guard arm attached to the door frame side and works in the same way as a door chain, a dead bolt that serves as a main locking means, and an arc-shaped movable locus that projects. And a lock means for engaging with the door frame by moving back and forth from the upper end surface or the lower end surface of the door 3.
[0015]
The pedestal unit C is provided with a first cylinder lock 5 and a second cylinder lock 7 at the top and bottom. The first and second cylinder locks 5 and 7 have the insertion port of the key 9 shown in FIG. 4 exposed to the outdoor side, while the rotating shafts 11 and 13 of FIG. Is protruding. The first and second cylinder locks 5 and 7 are rotated by the same key 9.
[0016]
The key 9 includes an owner key 9 and a consky (not shown), for example. The consky is shorter and has a smaller number of concave and convex grooves (key grooves) 9 a than the owner key 9. The consky is used for closing the door during construction during the construction period before delivery of the building. When the owner key 9 is used after delivery of the building, this consky is unusable for unlocking because a cylinder that cannot be handled with a small number of key grooves is operated.
[0017]
A stopper dharma 15 is fitted to the rotation shaft 11 of the first cylinder lock 5 so as not to be relatively rotatable, and the stopper dharma 15 rotates integrally with the rotation shaft 11. As shown in FIG. 6, the stopper dharma 15 is provided with a protruding plate 15a protruding in the axial direction and an engaging plate 15b protruding 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 locking member to be moved back and forth from the lock box A via the mechanism in the lock box A. Yes.
[0018]
A reset dharma 17 is fitted on the outer periphery of the stopper dharma 15 so as to be relatively rotatable. As shown in FIG. 7, the reset dharma 17 is provided with a pair of convex portions 17a and 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 the hole 17c opened at the center.
[0019]
A secondary dharma 19 is fitted to the rotary shaft 13 of the second cylinder lock 7 so as not to be relatively rotatable, and the secondary dharma 19 rotates integrally with the rotary shaft 13. As shown in FIG. 8, the sub dharma 19 is provided with a pair of regulating arms 19 a and 19 b that protrude in the diameter direction from the circumference. One restricting arm 19 a is provided with a small protrusion 19 c that protrudes in the same direction as the axis of the sub-dharma 19.
[0020]
The pedestal unit C has a recess 21 shown in FIG. The stopper dharma 15, the reset dharma 17, and the sub dharma 19 are disposed in the recess 21. A bottom plate 23 is provided between the bottom surface of the recess 21 and the dharma 15, 17, 19. As shown in FIG. 5, the bottom plate 23 has a notch 23a along the circumference of the stopper dharma 15, a hole 23b along the circumference of the auxiliary dharma 19, a shaft hole 23c, and a pair of left and right elongated holes 23d. , 23d and a pair of notched portions 23e, 23e located at both side edge portions. The bottom plate 23 is fixed to the bottom of the recess 21 so as not to move by screw holes 23f at the four corners.
[0021]
As shown in FIG. 3, a slide plate 25 is provided between the bottom plate 23 and the lock box A in parallel. The slide plate 25 is in sliding contact with the inner wall of the recess 21 at both side edges, and is slidable in the up-down direction (up-down direction in FIG. 2) by the recess 21. In this specification, the upper slide position of the slide plate 25 (position shown in FIG. 15) is the one slide position, and the lower slide position of the slide plate 25 (position shown in FIG. 2) is the other slide. This is called the position.
[0022]
As shown in FIG. 9, a relief portion 25 a along the rotation locus of the reset plate 17 b is cut out at the upper side portion of the slide plate 25. A click shaft loose fitting groove 25b is cut out at the lower center of the escape portion 25a. The slide plate 25 engages the click shaft loose fitting groove 25b with the engagement plate 15b of the stopper dharma 15 at one slide position shown in FIG. 15 to prevent the rotation of the first cylinder lock 5, and the other slide shown in FIG. The first shaft lock 5 is made rotatable by releasing the engagement between the click shaft loose fitting groove 25b and the stopper dharma 15 at the sliding position.
[0023]
Arm grooves 25c and 25c are cut out in the left and right side portions of the slide plate 25, respectively. A central notch 25 d along the circumference of the sub-dharma 19 is notched on the lower side of the slide plate 25. A groove 25e is continuously formed on the left portion of the central notch 25d, and a small protrusion groove 25f is continuously cut on the right portion.
The slide plate 25 has a spring pin hole 25g and a pair of arm pin holes 25h and 25h. Further, the slide plate 25 is formed with a pair of cut-and-raised portions 25j and 25j that rise in the direction of the bottom plate 23. The slide plate 25 is moved to one slide position or the other slide position when the small protrusion groove 25f is pressed against the small protrusion 19c of the sub-dharma 19. The vertical width of the small protrusion groove 25 f is a width corresponding to an angle of 45 ° in the rotation angle of the sub-dharma 19.
[0024]
A click spring pin 27 shown in FIG. 11B is fitted into the spring pin hole 25g from the bottom plate 23 side surface of the slide plate 25 (see FIG. 2). A cylindrical click shaft 29 shown in FIG. 11A is erected in the recess 21 of the pedestal unit C through the shaft hole 23c and the click shaft loose fitting groove 25b. One end of the click spring 31 shown in FIG. 2 is supported by the click shaft 29, and the other end of the click spring 31 is supported by the click spring pin 27. That is, the click spring 31 is disposed between the base unit C and the slide plate 25, and biases the slide plate 25 to one slide position or the other slide position.
[0025]
Arm pins 33 shown in FIG. 11C are fitted into the pair of arm pin holes 25h from the bottom plate 23 side surface of the slide plate 25, respectively. Arms 34 and 35 shown in FIGS. 10A and 10B are rotatably supported on the respective arm pins 33. That is, the arms 34 and 35 are moved together with the slide plate 25. The arms 34, 35 are provided with spring seats 34a, 35a and rotation restricting projections 34b, 35b.
[0026]
An arm spring 37 shown in FIG. 2 is attached to the arm pin 33. One end of the arm spring 37 is cut and raised and hooked to the 25j, and the other end is hooked to the spring seats 34a and 35a. Each arm 34, 35 is urged by an arm spring 37 so that its tip rotates in the center direction of the slide plate 25.
Further, the rotation of the arms 34 and 35 is restricted at a predetermined position by the rotation restricting projections 34 b and 35 b coming into contact with the arm groove 25 c of the slide plate 25. Further, the tip portions of the arms 34 and 35 are formed in a bowl shape, and a sliding contact pin 36 shown in FIG. The slidable contact pins 36 provided on the respective arms 34 and 35 are slidably contacted with the notched portion 23e of the bottom plate 23 when the arms 34 and 35 are urged by the arm springs 37. The hook-shaped tips 34c and 35c of the arms 34 and 35 are adapted to engage with the restricting arms 19b and 19a of the auxiliary dharma 19.
[0027]
The recesses 21 in which the stopper dharma 15, reset dharma 17, sub dharma 19, bottom plate 23 and slide plate 25 are accommodated are covered with a cover plate 39 shown in FIG. The cover plate 39 includes an upper hole 39a that exposes the stopper dharma 15 and the reset dharma 17, a lower hole 39b that exposes the auxiliary dharma 19, a fixing hole 39c that matches the hollow hole of the click shaft 29, and a mounting hole 39d. Is drilled. As shown in FIG. 1, the cover plate 39 is fixed to the pedestal unit C by a countersunk screw 41 inserted through the fixing hole 39c and a screw inserted through the mounting hole 39d.
[0028]
As shown in FIG. 1, the thumb turn unit D is rotatably provided with a thumb turn 45 that exposes the knob 45a on the indoor side. A shaft 45b protruding into the lock box A is fixed to the knob 45a of the thumb turn 45. By rotating the thumb turn 45, the mechanism part in the lock box A is operated via the shaft 45b, and the lock member is moved forward and backward 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 the mechanism portion in the lock box A. That is, the upper side of the slide plate 25 is brought into contact with the reset plate 17b of the reset dharma 17 rotated by the thumb turn 45, and is moved from one slide position to the other slide position.
[0029]
Next, the operation of the locking / unlocking device 1 configured as described above will be described.
[Operations from the indoor side]
As for the locking / unlocking operation by the thumb turn 45, the guard locking state can be performed by rotating 45 °, and the locking / unlocking operation can be performed by rotating 90 °. The thumb turn 45 can be operated regardless of the single lock or double lock state of the first cylinder lock 5 and the second cylinder lock 7 (outdoor cylinder) by the key 9 from the outdoor side.
[0030]
According to the operation of the thumb turn 45, even in the double lock state shown in FIG. 15, the reset plate 17b of the reset dharma 17 depresses the upper side of the slide plate 25 and moves the slide plate 25 to the other slide position. The second cylinder lock 7 is unlocked and at the same time the first cylinder lock is unlocked. 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 up and maintained at the other slide position. This makes it impossible to operate the second cylinder lock 7.
[0031]
[Operations from outside]
1. Double lock: A mechanism that requires two operations of locking and unlocking (security-oriented type)
(I) First, the locking operation is performed with the key 9 on the first cylinder lock 5 of the locking / unlocking device 1. When the first cylinder lock 5 is in the locked state and the second cylinder lock 7 is not operated as shown in FIG. When rotated (counterclockwise in the figure), as shown in FIG. 14, the small projection 19c of the sub dharma 19 slides on the small projection groove 25f to push up the slide plate 25, and the double lock state shown in FIG. become. At this time, as the slide plate 25 moves up, the arm 35 moves backward by sliding with the notch 23e of the sliding contact pin 36.
[0032]
Then, the 45-degree rotation is returned in order to remove the key 9 from the second cylinder lock 7, so that the restricting arm 19 b of the sub-dharma 19 is engaged with the locking tip 34 c of the arm 34 that is advanced by the urging force of the arm spring 37. Match. As a result, the second cylinder lock 7 connected to the auxiliary dharma 19 is restricted from further rotation (counterclockwise direction in FIG. 15).
In this double lock state, the rotation shaft 11 of the first cylinder lock 5 is restricted in rotation by engaging the engagement plate 15b of the stopper dharma 15 and the click shaft loose fitting groove 25b of the slide plate 25 at one slide position. The first cylinder lock 5 cannot be operated.
[0033]
(Ii) In the unlocking operation from this double lock state, first, the second cylinder lock 7 is rotated by 45 ° in the opposite direction to the above (clockwise direction in FIG. 15). Then, the slide plate 25 is moved to the other slide position (downward in the figure) shown in FIG. 16 by the sub dharma 19 and the lock on the first cylinder lock 5 is released. That is, it becomes a single lock state, and it will be in the state shown in FIG. In this case, the second cylinder lock 7 is such that the restricting arm 19a of the sub-dharma 19 is engaged with the hooked tip 35c of the arm 35, and the second cylinder lock 7 connected to the sub-dharma 19 is further Rotation (clockwise direction in FIG. 13) is restricted.
[0034]
(Iii) Accordingly, by the operation of (ii), the first cylinder lock 5 can be unlocked because the stopper dharma 15 is not restricted from the slide plate 25, that is, the first cylinder can be operated with the key 9. The lock 5 is unlocked by operating the lock 5.
[0035]
(Iv) Therefore, in order to make the double lock state again, the operation of the above (i) in which the first cylinder lock 5 is locked with the key 9 is performed.
[0036]
2. Single lock: A mechanism that can be unlocked with one operation (operability-oriented type)
(I) When the second cylinder lock 7 is switched to a single lock at the time of double lock, or when the thumb turn 45 is unlocked (or guard locked), the outdoor cylinder is in a single lock state. That is, in a state where the slide plate 25 is at the other slide position (downward in the figure), the single lock can always be performed.
[0037]
(Ii) In this single lock state, an operation of switching from the outdoor side to the double lock by the second cylinder lock 7, that is, an operation of moving the slide plate 25 to one slide position (upward in the figure) with the key 9 is performed. It will be held as long as there is not. In this state, the first cylinder lock 5 can be locked / unlocked with the key 9 as in the case of the normal one cylinder lock.
[0038]
Thus, in the above-described locking / unlocking device 1, when locking from the outdoor side, only the first cylinder lock 5 is operated by key operation so that the lock member is advanced and retracted to perform locking / unlocking.
That is, in this case, a single lock as a normal one-cylinder lock is possible.
When the second cylinder lock 7 is key-operated from the outdoor side in the single lock state, the slide plate 25 is slid to one slide position where the rotation of the first cylinder lock 5 is prevented, and the first cylinder lock 5 is directly moved. Then, it becomes a double lock state that cannot be unlocked by key operation.
[0039]
In order to unlock the locking / unlocking device 1 in the double-locked state from the outdoor side, first, the second cylinder lock 7 is operated with the key 9. When the second cylinder lock 7 is operated by key operation, the slide plate 25 is moved to the other slide position, and the rotation prevention of the first cylinder lock 5 is released. As a result, the single cylinder lock 5 is again brought into a single lock state, and the unlocking device 1 can be unlocked by unlocking the first cylinder lock 5 with the key 9.
[0040]
On the other hand, in order 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 / unlocking device 1 is unlocked at once from the double lock state.
[0041]
Therefore, according to the locking / unlocking device 1, it can be operated from the outdoor side to a double-locked state as needed, while from the indoor side, it can be locked / unlocked with one thumb-turn, improving security performance and convenience at the same time. Will be able to achieve.
[0042]
【The invention's effect】
As described in detail above, the locking / unlocking device according to the present invention prevents the rotation of the first cylinder lock at the first cylinder lock at one slide position, and the first cylinder lock that advances and retracts the lock member by a key operation from the outdoor side, A slide plate that allows the first cylinder lock to rotate freely at the other slide position, 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 from the indoor side The lock member is moved forward and backward to rotate and lock and unlock, and at the time of unlocking, there is a thumb turn that moves the slide plate in one slide position to the other slide position. Can be single-locked and can be double-locked by keying the second cylinder lock in the single-locked state. Click it can be performed. Thereby, operation to a double lock state can be performed as needed from the outdoor side.
On the other hand, from the indoor side, the locking / unlocking operation can be performed with one thumb turn.
As a result, the security performance and convenience of the locking / unlocking device can be improved at the same time.
[0043]
Further, the operation method of the locking / unlocking device according to the present invention is such that after the single lock by the key operation of the first cylinder lock from the outdoor side, the second cylinder lock is operated from the outdoor side by the same key. Key operation of one cylinder lock becomes impossible, and when unlocking from the outside, the first cylinder lock is keyed only after the second cylinder lock is key operated to release the key disable state of the first cylinder lock. Since it cannot be operated, unlocking from the outdoor side can be made difficult.
On the other hand, when unlocking from the indoor side in the double lock state, the lock 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 unlocking from the indoor side can be facilitated.
As a result, the security performance and convenience of the locking / unlocking device can be improved at the same time.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a 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;
FIG. 4 is an exploded perspective view of a main part of the locking / unlocking device.
FIG. 5 is an enlarged perspective view of a bottom plate.
FIG. 6 is an enlarged perspective view of a stopper dharma.
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 the left arm in (a) and the right arm in (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 / 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 during 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]
1 ... Locking and unlocking device
3 ... door
5 ... 1st cylinder lock
7 ... Second cylinder lock
9 ... Key
25 ... Slide plate
45 ... Sam Turn
A ... Lock box

Claims (3)

In a locking / unlocking device provided with a lock member that is slidable with respect to a lock box disposed on the door and is advanced and retracted from the front end surface of the door,
A first cylinder lock which is provided on the outdoor side of the lock box and performs locking and unlocking by advancing and retracting the lock member by an operation with a key from the outdoor side;
A slide plate that is provided on the outdoor side of the lock box, prevents rotation of the first cylinder lock at one slide position, and allows the first cylinder lock to rotate at the other slide position;
A second cylinder lock that is provided on the outdoor side of the lock box and moves the slide plate to the one slide position or the other slide position by an operation by the key from the outdoor side;
The lock member is provided on the indoor side of the lock box, and the lock member is moved forward and backward by a rotation operation from the indoor side to perform locking and unlocking. At the time of unlocking, the slide plate in the one slide position is moved to the other slide position. Let the thumb turn,
And a locking / unlocking device. In the operation method of the locking / unlocking device provided with the lock member that is slidably provided with respect to the lock box disposed on the door and is advanced and retracted from the front end surface of the door,
Operation to lock the single lock by projecting the locking member by operating the first cylinder lock with the key from the outdoor side,
After the single lock, an operation of disabling the key operation of the first cylinder lock by operating the second cylinder lock from the outdoor side with the key, and a double lock;
For unlocking from the outdoor side in the double lock state, the second cylinder lock is operated with the key to release the key operation disabled state of the first cylinder lock, and then the first cylinder lock is moved to the key. The operation of reversing and unlocking the lock member, or the unlocking from the indoor side of the double lock state, the operation of retracting and unlocking the lock member only by the rotation operation of the thumb turn,
The operation method of the locking / unlocking apparatus characterized by including. The operation method of the locking / unlocking device according to claim 2, wherein when the first cylinder lock is in an unlocked state, the second cylinder lock cannot be operated by a key.

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