JP5014741B2 - Door locking device - Google Patents

Description

  The present invention relates to a door locking device. More specifically, the present invention relates to a door locking device provided with a locking lock and an unlocking lock.

  In game centers and the like, for example, a salesperson or a manager (hereinafter referred to as “a manager or the like” unless otherwise specified) stores prizes or the like in a locker, while the player locks the locker according to a predetermined rule. There is a game in which a specific key that is locked is acquired, and a locker door corresponding to the acquired key is opened so that prizes stored therein can be obtained.

The inventor of the present invention has proposed a locker door locking device used in such a game (see Patent Document 1).
In the door locking device described in Patent Document 1, the first cylinder lock for locking and the second cylinder lock for unlocking are mounted on the front plate portion of the base frame with the axis of each lock shaft in parallel. The first cylinder lock is a lock whose lock shaft can be rotated by a predetermined angle by a lock key. The lock shaft has a contact arm that rotates integrally with the rotation of the lock shaft. A latch provided with an abutting protrusion with the corresponding contact arm is rotatably supported, and the second cylinder lock is configured such that the lock shaft can be rotated by a predetermined angle by an unlock key, The unlocking key cannot be removed at the unlocking position of the latch, and a cam that rotates integrally with the rotation is attached to the lock shaft. And a cam contact end edge formed of an engagement end edge. An abutting portion that abuts on the edge is provided, and an elastic member is latched on the latch and the cam, and the biasing force causes the cam abutting edge of the latch and the abutting portion of the cam to abut. The latch has a configuration that can be stopped by a stopper at the unlocked position.

  According to this door locking device, the lock can be locked by rotating the latch from the unlocking position to the locking position only by performing the locking operation of the first cylinder lock with the locking key, and the second cylinder lock can be locked with the unlocking key. By simply performing the unlocking operation, the latch can be returned from the locked position to the unlocked position and unlocked.

  More specifically, the latch is in the unlocked position in contact with the stopper, and the unlock key cannot be removed from the second cylinder lock (the cam is in a position corresponding to the unlocked position of the latch). )), The abutment arm abuts on the abutment protrusion of the latch as the lock shaft of the first cylinder lock is rotated by performing the locking operation of the first cylinder lock by the locking key. The latch is rotated about the axis of the lock shaft to the lock position while resisting the urging force. The rotation from the unlocked position to the locked position about the axis of the lock shaft of the first cylinder lock of the latch is caused by the biasing force of the elastic member and the guide end edge of the latch cam contact edge. This is performed in a state where the contact portion of the cam is in contact. When the latch reaches the locking position, the cam momentarily reverses and rotates about the axis of the locking shaft of the second cylinder lock by the biasing force of the elastic member, and stops at a predetermined angular position. At this position, the engaging edge of the latch and the contact portion of the cam contact each other, so that the latch cannot be rotated from the locked position in the unlocking direction, the latch is locked in the locked position, and the second cylinder The unlock key can be removed from the lock.

By unlocking the second cylinder lock with the unlock key in the latched state, the cam is rotated in the unlocking direction together with the lock shaft of the second cylinder lock against the urging force of the elastic member. When the contact between the cam contact portion and the engagement edge of the latch is released, the latch is instantaneously rotated around the axis of the lock shaft of the first cylinder lock by the biasing force of the elastic member. As a result, the unlocked position comes into contact with the stopper.
When the latch returns to the unlocked position where it comes into contact with the stopper, the cam abuts against the guide edge of the latch, and the second cylinder lock cannot be operated with the unlock key, and is unlocked from the second cylinder lock. The lock key cannot be removed.

Therefore, when used as a lock device for a locker door installed in a game center or the like, an administrator or the like stores prizes in an empty locker, closes the door, and then locks the first cylinder lock with a lock key. By simply performing the operation, the latch can be rotated about the axis of the lock shaft to the lock position and the door can be locked, as is apparent from the above. Then, the locking key and the unlocking key are extracted, and the unlocking key is used for the game. When the player acquires an unlocking key used for a specific locker by a game and performs the unlocking operation of the second cylinder lock by using the key, the latch becomes a stopper as apparent from the above. The unlocked position comes into contact, and the state returns to the initial state where the unlock key cannot be removed from the second cylinder lock. The player can open the locker door and win prizes stored in the locker door, but cannot take the unlock key out of the second cylinder lock for mischief or fraudulent purposes.
JP 2004-245015 A

By the way, the game locker equipped with the door locking device described in Patent Document 1 has a transparent window so that prizes and the like stored therein can be confirmed from the outside and the player can be interested. There are many.
In the case of such a locker, when the player confirms the prize etc. stored in the locker corresponding to the unlocking key acquired by the game through the transparent window, the prize etc. is not expected or likes. Then, the unlocking key may be taken home without obtaining a prize or the like using the unlocking key. Unlocked keys that are taken home may not be used at a later date, but are often lost.

  Taking a key unlocked by a player and not using it for a long time or losing it means that the number of lockers subject to the game is reduced, and it is not possible to unlock for other players. Even if a player wants a prize or the like, it cannot be acquired, and the interest of other players in the game is reduced. Therefore, as an administrator, assuming that the unlocking key will be taken home, prepare spare keys for all unlocking keys in advance, or use the key with the same code as the unlocking key that was taken home. It is necessary to make all the lockers eligible for the game.

By the way, using the spare or new key as an unlock key for the game means that the original unlock key brought back and the spare or new unlock key coexist, and will be described in detail below. It is not preferable.
That is, if a spare or new key is used in a game as an unlocking key of a locker corresponding to the original unlocking key, if a person who has the original unlocking key comes to the game site later, it will be different from the previous one. If the person who has the original unlock key comes to the game site after the manager has received another prize, etc. If the prizes stored in the box are satisfactory, the original unlock key may be used to obtain the prizes. Then, in such a situation, the player who participated in the game and acquired the preliminary or new unlock key would have acquired an empty locker unlock key and could not get prizes etc. from the locker Cause trouble.
After unlocking the locker with a spare or new unlocking key, it is possible to remove the door locking device and replace it with another locker door locking device. If the owner searches for the locker corresponding to the key, it is possible to search for a match, so the same trouble as described above, that is, the player who has acquired a new unlock key, There is still a possibility that it will not be possible to obtain prizes. In addition, if the spare key is used as an unlocking key for the game, the key with the same code as the spare key may be renewed so that the spare key may not be unlocked and may be taken home. It is necessary to keep it.

After all, if the unlocking key acquired by the player is taken home and is not used for a long time, the key with the same code as that is given as the waiver of the right to receive prizes etc. stored in the locker corresponding to the unlocking key Is used as a spare key or is newly made, and the locker is unlocked, and at least the second cylinder lock corresponding to the spare or new unlock key is removed from the door locking device. It can be said that replacing the cord with the second cylinder lock is preferable for preventing trouble.
As a result, for the administrator, etc., after the unlocking key which is reserved or newly made is used for unlocking the locker, it is discarded together with the corresponding second cylinder lock, and the locker locking device is once unlocked. Keeping a spare key just to do or renewing a new key would require extra costs.

  The present invention was devised as a result of diligent research in view of the above situation, and was obtained by a door locking device that can be unlocked not only by an unlocking key but also by a locking key, particularly by a player. When the unlocking key is taken home, it is not necessary to unlock the locker by renewing the key with the same code as that, and the locker for the first cylinder lock owned by the administrator etc. can be unlocked. It aims at providing the locking device for doors which can be locked.

In order to solve the above-described problems, the present invention provides (i) a first cylinder lock for locking and a second cylinder lock for unlocking on the front plate portion of the base frame, with the axes of the respective lock shafts being parallel to each other. In the door locking device attached in this manner, the first cylinder lock is a lock whose lock shaft can be rotated by a predetermined angle by a lock key, and an abutment arm can be rotated integrally with the lock shaft. The forced unlocking lever and the latch are rotatably supported, and the latch is brought into contact with the abutting arm by rotating the locking shaft of the first cylinder lock in the locking direction. A contact protrusion having a contact protrusion that is capable of contacting the contact arm by rotating the lock shaft of the first cylinder lock in the anti-locking direction. The second cylinder lock has a lock shaft that can be rotated by a predetermined angle by an unlock key. The unlocking key cannot be removed at the unlocking position of the latch, and the unlocking operation member is attached to the lock shaft so as to be integrally rotatable, and the unlocking cam is rotatable. The unlocking cam is supported by an engaging portion with which a protrusion formed on the unlocking operation member can be engaged by rotation of the locking shaft of the second cylinder lock in the unlocking direction. The forced unlocking operation lever is brought into contact with the contact protrusion of the forced unlocking operation lever by the rotation of the locking shaft of the first cylinder lock in the anti-locking direction. The forcible unlocking contact edge formed on the hook has an abutting projection that can contact, and an elastic member is hooked on the latch and the unlocking cam, and is formed on the latch by its urging force. The cam contact end edge composed of the guide end edge and the engagement end edge contacts the contact portion formed on the unlocking cam. It has become so that the latch are capable stopped by the stopper at the unlocking position, in the unlocking position where the latch is in contact with the stopper, the unlocking key from the second cylinder lock is disabled extraction When the locking shaft of the first cylinder lock is rotated in the locking direction by the locking operation of the first cylinder lock by the locking key, the contact arm comes into contact with the contact protrusion of the latch. The latch is centered on the axis of the lock shaft of the first cylinder lock while the guide end edge of the latch and the contact portion of the unlocking cam are in contact with each other while resisting the biasing force of the elastic member. When it is rotated to the locking position, the biasing force of the elastic member switches to the contact between the engagement end edge of the latch and the contact portion of the unlocking cam, and the second cylinder lock is unlocked. The key can be removed, When the latch is locked, by the unlocking operation of the second cylinder lock by the unlocking key, the lock shaft of the second cylinder lock is rotated in the unlocking direction, and the protruding portion of the unlocking operation member is moved. Engaging with the engaging portion of the unlocking cam, the unlocking cam is rotated in the unlocking direction around the axis of the lock shaft of the second cylinder lock while resisting the biasing force of the elastic member. When the contact between the abutment portion of the unlocking cam and the engagement end edge of the latch is released, the latch is moved by the biasing force of the elastic member to the shaft of the lock shaft of the first cylinder lock. Returning to the unlocked position where it pivots about the center and abuts against the stopper, or in the locked state of the latch, by the forced unlocking operation in the anti-locking direction of the first cylinder lock by the locking key, When the lock shaft of the first cylinder lock is rotated in the anti-locking direction, the contact arm And the forced unlocking operation lever rotates in the same direction as the lock shaft of the first cylinder lock, so that the forced unlocking lever rotates. The contact protrusion of the unlocking cam is pushed by the forced unlocking contact edge of the operating lever, and the unlocking cam is moved against the urging force of the elastic member to lock the unlocking cam When the contact between the contact portion of the unlocking cam and the engagement end edge of the latch is released, the latch is moved by the biasing force of the elastic member. It is characterized in that it is rotated about the axis of the lock shaft of the one cylinder lock and returns to the unlocked position in contact with the stopper .

According to this, only by performing the locking operation of the first cylinder lock by the locking key, the latch can be rotated from the unlocking position to the locking position, and the second cylinder lock can be unlocked by the unlocking key. It is possible by either one of the normal unlocking performed by operating and the forced unlocking performed by operating the first cylinder lock with the locking key.
That is, by rotating the locking shaft of the first cylinder lock in the locking direction by the locking key, the abutting arm is brought into contact with the abutting protrusion of the latch, and the latch is rotated from the unlocked position to the locked position. Thus, by the biasing force of the elastic member, the abutment portion of the unlocking cam can be brought into contact with the engaging edge of the latch, and in the locked state, the second by the unlocking key can be obtained. By rotating the locking shaft of the cylinder lock in the unlocking direction, the projecting portion of the unlocking operation member is engaged with the engaging portion of the unlocking cam, or the unlocking cam is rotated, or For the forced unlocking operation, the abutment arm is brought into contact with the abutment protrusion of the forced unlocking operation lever by turning the locking shaft of the first cylinder lock in the anti-locking direction by the locking key. By rotating the lever, the unlocking cam is rotated so that the unlocking cam Parts and then releasing the contact between the engaging edge of the latch, by the urging force of the elastic member, can be returned to the unlocked position latch from locking position.

The details will be described below.
The latch is in the unlocked position where it comes into contact with the stopper, and the unlock key cannot be removed from the second cylinder lock (the unlocking cam and the unlocking operation member are in positions corresponding to the unlocked position of the latch. In order to perform locking, the locking key is operated to rotate the lock shaft of the first cylinder lock in the locking direction. First, the contact arm is brought into contact with the contact protrusion of the latch. Next, the latch is rotated to the locking position about the axis of the lock shaft while resisting the urging force of the elastic member while the abutting arm and the contact projection of the latch are in contact with each other. Can do. The rotation of the latch from the unlocking position around the lock shaft of the first cylinder lock to the locking position is caused by the biasing force of the elastic member, and the guide edge and the unlocking cam among the cam contact edges of the latch. This is performed in a state in which the abutting portion is in contact. When the latch reaches the locking position, the latch is instantaneously switched to contact between the engagement edge of the latch and the contact portion of the unlocking cam by the biasing force of the elastic member, and the latch is locked in the locking position. Will be. In this state, the unlocking key can be removed by operating the unlocking key and rotating the lock shaft of the second cylinder lock to a position where the unlocking key can be removed.

To normally unlock the latch in the locked state, the unlocking key is operated, the lock shaft of the second cylinder lock is rotated in the unlocking direction, and the protruding portion of the unlocking operation member is unlocked. Engaging with the engaging portion of the cam, rotating the unlocking cam about the axis of the locking shaft in the unlocking direction while resisting the biasing force of the elastic member, When the contact with the engaging edge of the latch is released, the latch is instantly rotated around the axis of the lock shaft of the first cylinder lock by the biasing force of the elastic member, and unlocked in contact with the stopper. It will return to the position.
In addition, after the contact between the contact portion of the unlocking cam and the engaging edge of the latch is released, the latch is instantaneously returned to the unlocked position. The contact portion between the edge and the unlocking cam may be in contact or may not be in contact. When the latch returns to the unlocked position where it comes into contact with the stopper, the abutment portion of the unlocking cam abuts on the guide edge of the latch, and the second cylinder lock cannot be operated with the unlock key. Will be unable to be removed.

  To forcibly unlock the latch in the locked state, when the lock key is operated and the lock shaft of the first cylinder lock is rotated in the counter-locking direction, the contact arm is first rotated and forced. Abuts against the abutment protrusion of the unlocking lever, then the forced unlocking lever rotates in the same direction as the lock shaft, and is unlocked by the forced unlocking contact edge of the forced unlocking lever. The abutment protrusion of the cam is pushed and resists the urging force of the elastic member, and the unlocking cam is rotated in the unlocking direction around the lock shaft of the second cylinder lock, so that the unlocking cam When the contact between the contact portion and the engaging edge of the latch is released, the latch is instantaneously rotated around the axis of the lock shaft of the first cylinder lock by the biasing force of the elastic member and comes into contact with the stopper. It will return to the unlocked position.

Therefore, for example, when used as a lock device for a locker door installed in a game center or the like, an administrator or the like stores prizes in an empty locker, closes the door, and then operates a lock key. By simply rotating the lock shaft of the first cylinder lock in the locking direction, the latch can be rotated about the axis of the lock shaft to the locking position, and the door can be locked.
Then, the locking key and the unlocking key are extracted, and the unlocking key is used for the game. When the player acquires the unlock key by the game and performs the unlocking operation of the corresponding second cylinder lock of the locker, the latch is unlocked in contact with the stopper from the locked position as described above. The position returns to the initial state in which the unlock key cannot be removed from the second cylinder lock. The player can open the locker door and take out the prizes stored.

  If the player does not unlock the door using the acquired unlocking key and brings the unlocking key back, the manager etc. operates the locking key to move the locking shaft of the first cylinder lock in the anti-locking direction. As is clear from the above description, the latch can be returned from the locked position to the unlocked position in contact with the stopper only by turning.

Thus, according to this door locking device, locking is performed simply by performing the locking operation of the first cylinder lock with the locking key, and is simple. In addition, simply by unlocking the second cylinder lock with the unlock key, the latch returns instantaneously to the unlocked position, and the latch cannot be temporarily maintained even in the middle. Open the door by operating the unlocking key until the door can only be unlocked, and then return the unlocking key to the state before the operation and put the latch in the locked position, For example, it is only possible to win prizes and the like stored in the locker, and the unlock key cannot be removed from the second cylinder lock for mischief or fraudulent purposes.
When the player brings the unlock key back without opening the door using the acquired unlock key, the manager or the like operates the lock key to move the lock shaft of the first cylinder lock in the anti-lock direction. Can be unlocked by simply rotating the door, and by removing the door locking device from the locker and replacing the second cylinder lock, troubles can be prevented.
The door locking device has a small number of parts, has a simple structure, is unlikely to fail, and is robust, compact, easy to assemble, and low in manufacturing cost.

As a more specific example of (i), (ii) a first cylinder lock for locking and a second cylinder lock for unlocking on the front plate of the base frame, the axes of the respective lock shafts are parallel to each other. In the door locking device attached in this manner, the first cylinder lock is a lock whose lock shaft can be rotated by a predetermined angle by a lock key, and an abutment arm can be rotated integrally with the lock shaft. The forced unlocking lever and the latch are rotatably supported, and the latch has a plate shape and is formed with a cam contact edge consisting of a guide edge and an engagement edge. The first cylinder lock has an abutment projection that can be brought into contact with the abutment arm by rotating the lock shaft in the locking direction, and the contact projection is a female screw formed on a latch. From the first shaft portion erected from the front surface of the latch by screwing the male screw of the first shaft member to The male screw extends a predetermined length from the back of the latch, and the forcible unlocking operation lever moves the abutting arm by rotating the locking shaft of the first cylinder lock in the anti-locking direction. The second cylinder lock has a locking shaft that can be rotated by a predetermined angle by an unlocking key, and the unlocking key cannot be removed at the unlocking position of the latch. The unlocking operation member is attached to the lock shaft so as to be integrally rotatable, the unlocking cam is rotatably supported, and the unlocking cam is plate-shaped, An engagement portion with which the protrusion formed on the unlocking operation member can be engaged by the rotation of the lock shaft of the second cylinder lock in the unlocking direction and the lock of the lock shaft of the first cylinder lock. By the rotation in the locking direction, the contact arm contacts the contact protrusion of the forced unlocking lever. And a forcible unlocking contact edge formed on the forcible unlocking operation lever can be contacted, and the corresponding contact projection is formed on the unlocking cam. The male screw of the second shaft member is screwed into the female screw and the second shaft portion is erected from the front surface of the unlocking cam. The male screw has a predetermined length from the rear surface of the unlocking cam. The cylindrical body is loosely fitted to the extended male screw to form a contact portion that contacts the cam contact edge of the latch, and the extension of the male screw of the first shaft member of the latch An elastic member is hooked on the extended portion of the external thread further extended from the cylindrical body loosely fitted on the external thread of the second shaft member of the unlocking cam and the unlocking cam. The latch cam abutting edge and the unlocking cam abutting portion come into contact with each other, and the latch is stopped by a stopper at the unlocking position. In the unlocked position where the latch is in contact with the stopper, the unlock key cannot be removed from the second cylinder lock, and by the locking operation of the first cylinder lock with the lock key, When the lock shaft of the first cylinder lock is rotated in the locking direction, the contact arm comes into contact with the first shaft portion which is the contact protrusion of the latch and resists the biasing force of the elastic member. When the latch is rotated around the axis of the lock shaft of the first cylinder lock while the guide edge of the latch is in contact with the contact portion of the unlocking cam, Due to the urging force of the elastic member, the engagement end edge of the latch is switched to contact with the contact portion of the unlocking cam, and the unlocking key can be removed from the second cylinder lock. In the state, the first key by the unlock key By unlocking the two-cylinder lock, the lock shaft of the second cylinder lock is rotated in the unlocking direction, and the protruding portion of the unlocking operation member is engaged with the engaging portion of the unlocking cam. The unlocking cam is rotated in the unlocking direction about the axis of the lock shaft of the second cylinder lock while resisting the urging force of the elastic member, and the abutment portion of the unlocking cam When the contact with the engaging edge of the latch is released, the latch is rotated around the axis of the lock shaft of the first cylinder lock by the biasing force of the elastic member and comes into contact with the stopper. Returning to the unlocked position, or in the locked state of the latch, the lock shaft of the first cylinder lock is moved in the anti-locking direction by the forced unlocking operation in the anti-locking direction of the first cylinder lock by the locking key. When pivoted, the abutment arm pivots to the abutment protrusion of the forced unlocking lever. The operation lever for forced unlocking rotates in the same direction as the lock shaft of the first cylinder lock, and the contact of the unlocking cam by the forced unlocking contact edge of the operation lever for forced unlocking The unlocking cam is rotated about the lock shaft of the second cylinder lock against the urging force of the elastic member when the second shaft portion, which is a projection, is pushed, and the unlocking is performed. When the contact between the contact portion of the cam and the engagement edge of the latch is released, the latch is rotated about the axis of the lock shaft of the first cylinder lock by the biasing force of the elastic member. And it is good also as returning to the unlocking position contact | abutted with the stopper.
And (iii) the latch is plate-shaped, and the cam contact edge of the latch is composed of an arcuate guide end edge and a linear engagement end edge, and the contact protrusion of the latch is A first shaft portion erected from the front surface of the latch by screwing a male screw of the first shaft member into a female screw formed on the latch, and the male screw extends a predetermined length from the rear surface of the latch. The unlocking cam is plate-shaped, and the contact protrusion of the unlocking cam is screwed with the male screw of the second shaft member into the female screw formed on the unlocking cam. Thus, it comprises a second shaft portion erected from the front surface of the unlocking cam, the male screw extends a predetermined length from the rear surface of the unlocking cam, and a cylindrical body is loosely fitted to the male screw. is an abutment portion which abuts with the cam abutment edges of the latch Te, and the extending portion of the male thread of the first shaft member, loosely fitted to the male thread of the second shaft member It is preferable that the elastic member to the extending portion of the male screw which issued further outward from the cylindrical body that is hooked.
According to this, a commercial item etc. can be used for a component, it is cheap, and handling at the time of an assembly, exchange, etc. is easy.

(Iv) The elastic member is preferably a coil spring. A commercially available coil spring can be used, is inexpensive, and is easy to handle during assembly and replacement.

(V) It is preferable that the stopper is a side wall standing rearward from the front plate portion of the base frame. According to this, while being able to make a base frame sturdy, the separate member as a stopper is not required separately.

Since the door locking device of the present invention is configured as described above, the following effects can be obtained.
That is, the locking is performed simply by performing the locking operation of the first cylinder lock with the locking key, and is simple. In addition, simply by unlocking the second cylinder lock with the unlock key, the latch returns instantaneously to the unlocked position, and the latch cannot be temporarily maintained even in the middle. Open the door by operating the unlocking key until the door can only be unlocked, and then return the unlocking key to the state before the operation and put the latch in the locked position, For example, it is only possible to win prizes and the like stored in the locker, and the unlock key cannot be removed from the second cylinder lock for mischief or fraudulent purposes.
When the player brings the unlock key back without opening the door using the acquired unlock key, the manager or the like operates the lock key to move the lock shaft of the first cylinder lock in the anti-lock direction. Can be unlocked by simply rotating the door, and by removing the door locking device from the locker and replacing the second cylinder lock, troubles can be prevented.
The door locking device has a small number of parts, has a simple structure, is unlikely to fail, and is robust, compact, easy to assemble, and low in manufacturing cost.

Hereinafter, the best mode of the present invention will be described in more detail with reference to the drawings. Of course, the present invention is not limited to the following embodiments.
FIG. 1 is a partial perspective view from the back of one embodiment of the door locking device of the present invention, and FIG. 2 is an exploded perspective view excluding a back cover.
In these drawings, the latch 2 of the door locking device 1 is shown in the unlocked position.

  The base frame 3 of the door locking device 1 is formed by bending a metal plate into a U-shape in plan view, and faces the front plate portion 4 and the rear provided on the left and right sides of the front plate portion 4. It consists of side walls 5 and 6. A first cylinder lock 7 for locking is attached to the upper position of the front plate portion 4, and a second cylinder lock 8 for unlocking is attached to the lower position so that the axes of the lock shafts 9 and 10 are parallel to each other. . The first cylinder lock 7 is attached to the front plate portion 4 by inserting the first cylinder lock 7 from the front side of the front plate portion 4 into the lock insertion hole 12 formed in the upper position of the front plate portion 4. This is done by inserting the lock nut 9 first, and screwing the mounting nut 13 into the thread formed on the outer periphery of the outer cylinder that protrudes to the back side of the front plate portion 4. Similarly, the second cylinder lock 8 is attached to the front plate portion 4 from the front side of the front plate portion 4 through the lock insertion hole 14 formed in the lower position of the front plate portion 4. The cylinder lock 8 is inserted through the lock shaft 10 first, and a mounting nut 15 is screwed onto a thread formed on the outer periphery of the outer cylinder that protrudes to the back side of the front plate portion 4.

A rotation restricting plate 16 having two claws at a predetermined angular position is fitted on the lock shaft 9 of the first cylinder lock 7 and rotates integrally with the lock shaft 9. On the outer cylinder of the first cylinder lock 7, a claw of the rotation restricting plate 16 abuts, and a locking piece 17 for restricting the rotation of the lock shaft 9 to a predetermined angle is projected. Therefore, the lock shaft 9 is between the position where one claw of the rotation restricting plate 16 contacts one side of the locking piece 17 of the outer cylinder and the angle where the other claw contacts the other side of the locking piece 17. And is rotated by a predetermined angle in the locking direction (“counterclockwise” in FIGS. 1 and 2) or in the counterlocking direction (“clockwise” in FIGS. 1 and 2).
Further, a base end portion of a plate-like contact arm 19 is fitted into the lock shaft 9 so that the contact arm 19 rotates integrally with the lock shaft 9. The lock shaft 9 is fitted with a bearing fitting hole 20a formed in the plate-shaped forced unlocking lever 20 and a bearing 21 fitted in the bearing fitting hole 2a formed in the plate-shaped latch 2. The lever 20 for forced unlocking and the latch 2 are each supported so that rotation is possible. A tightening nut 22 is screwed into a thread formed on the lock shaft 9, and a bearing 21, a contact arm 19, and a rotation restricting plate 16 are mounted on the lock shaft 9 in this order from the rear.

  The abutting arm 19 has an oval shape in plan view, and comes into contact with the first shaft portion 23b of the latch 2 as described later by the rotation of the lock shaft 9 in the locking direction or the anti-locking direction. It comes into contact with the contact protrusion 20b of the unlocking operation lever 20.

  The forcible unlocking lever 20 is L-shaped with a wide plan view, the left edge in FIG. 2 is bent forward to form a strip-shaped abutment protrusion 20b, and the lower end edge is forcibly unlocked. It is a lock contact edge 20c.

The latch 2 has an inverted fan shape in plan view, and a female screw 2b is formed near the right oblique edge in the vicinity of the bearing fitting hole 2a. An arcuate guide end edge 2c that comes into contact with a cylindrical body mounted on an unlocking cam, which will be described later, and a linear engagement end edge 2d constitute a cam contact end edge. The male screw 23a of the first shaft member 23 is screwed into the female screw 2b of the latch 2, the first shaft portion 23b is erected from the front surface of the latch 2, and the male screw 23a extends from the rear surface of the latch 2. Yes. The first shaft portion 23b erected from the front surface of the latch 2 by screwing the male screw 23a of the first shaft member 23 into the female screw 2b formed on the latch 2 is a contact protrusion of the latch according to the present invention. It corresponds to one form included in.

A rotation restricting plate 24 having two claws at a predetermined angular position is fitted on the lock shaft 10 of the second cylinder lock 8 and rotates integrally with the lock shaft 10. A claw of the rotation restricting plate 24 abuts on the outer cylinder of the second cylinder lock 8, and a locking piece 25 for restricting the rotation of the lock shaft 10 to a predetermined angle is provided. Therefore, the lock shaft 10 is between the position where one claw of the rotation restricting plate 24 abuts on one side of the locking piece 25 of the outer cylinder and the angle where the other claw abuts on the other side of the locking piece 25. And is rotated by a predetermined angle in the unlocking direction ("clockwise" in FIGS. 1 and 2) or the direction in which the unlocking key can be removed ("counterclockwise" in FIGS. 1 and 2). . In the second cylinder lock 8, the unlock key 18 cannot be removed at the unlock position of the latch 2.
Further, a plate-like unlocking operation member 26 is fitted into the lock shaft 10 so as to rotate integrally with the lock shaft 10, and the plate-like unlocking cam 27 is drilled. The bearing 28 is rotatably supported via a bearing 28 fitted in the bearing fitting hole 27a. A tightening nut 29 is screwed into a screw thread formed on the lock shaft 10, and a bearing 28, an unlocking operation member 26, and a rotation restricting plate 24 are mounted on the lock shaft 10 in this order from the rear.

  The unlocking operation member 26 has a substantially square shape in a plan view, and is formed with a claw-like projecting portion 26a that extends backward from one end edge.

The unlocking cam 27 has a shape in which a protruding portion extends to one side of the rectangular plate in plan view, and the base of the protruding portion engages with the protruding portion 26a of the unlocking operation member 26. It functions as a portion 27b, and a female screw 27c is formed at the tip of the overhang portion. The male screw 30a of the second shaft member 30 is screwed into the female screw 27c, the second shaft portion 30b is erected from the front surface of the unlocking cam 27, and the male screw 30a is provided from the rear surface of the unlocking cam 27. It is extended. A cylindrical body 31 is loosely fitted to a part of the male screw 30a, and the cylindrical body 31 is rotatable with respect to the male screw 30a. The male screw 30 a extends further from the loosely fitted cylindrical body 31 to the rear side of the collar, and the extended portion is used as a latching portion of the coil spring 32. The second shaft portion 30b erected from the front surface of the unlocking cam 27 by screwing the male screw 30a of the second shaft member 30 into the female screw 27c formed on the unlocking cam 27 is the invention. This corresponds to one form included in the contact protrusion of the unlocking cam. Further, the structure in which the cylindrical body 31 is loosely fitted to a part of the male screw 30a extending from the back surface of the unlocking cam 27 includes a guide edge and an engagement edge formed on the latch in the present invention. This corresponds to one form included in the contact portion that contacts the cam contact edge.

  One end of the coil spring 32 is hooked on the male screw 23 a extending from the back side of the latch 2, and the other end is hooked on the extending portion of the male screw 30 a extending from the back side of the unlocking cam 27. The guide end edge 2c of the latch 2 and the cylindrical body 31 attached to the unlocking cam 27 are in contact with each other by the urging force of the coil spring 32, and the engagement end edge 2d of the latch 2 is connected to the base frame. 3 is in an unlocked position in contact with the inner surface of the left side wall 5, and the right oblique edge of the latch 2 is in a state of being slightly exposed from the slit 6 a formed in the right side wall 6. The left side wall 5 of the base frame 3 functions as a stopper that stops the latch 2 at the unlocking position.

As shown in FIG. 1, the inside can be protected by covering the base frame 3 with a back cover 33 and sealing it. By employing a sealed structure with such a back cover 33, for example, unauthorized operation by an unauthorized operation tool such as a piano wire having a hook formed at the tip can be prevented. The back cover is formed by bending a metal plate, and includes a right side plate portion 34, a back plate portion 35, and a base frame 3 provided with a locking portion 34 a that locks with the slit 6 a of the right side wall 6 of the base frame 3. It consists of a left side plate portion 36, an upper surface plate portion 37, and a lower surface plate portion 38 for overlapping with the left side wall 5. A through hole 36 a is formed in the left side plate portion 36 so that the through hole 36 a matches the screw hole 5 a formed in the left side wall 5 of the base frame 3, and the back cover 33 is formed in the base frame 3. It is fixed with a set screw. The width of the slit 6a of the right side wall 6 of the base frame 3 is set so that the latch 2 can pass through in the state in which the locking portion 34a of the back cover 33 is locked to the slit 6a. When the rotary door is locked in the locked position, the latch 2 is supported even if the door is forcibly opened, and an excessive force is applied to the lock shaft 9 of the first cylinder lock 7 and the like. Can be prevented.
In the vicinity of the upper and lower edges of the front plate portion 4 of the base frame 3, through holes 4a and 4a for attaching the door locking device to the door or the like are formed.

  According to this door locking device 1, the latch 2 can be rotated from the unlocking position to the locking position by simply performing the locking operation of the first cylinder lock 7 with the locking key 39. Normal unlocking in which the second cylinder lock 8 is operated with the unlocking key 18 and forced unlocking in which the first cylinder lock is operated with the locking key 39 are possible.

This will be described in more detail below.
First, the locking operation from the state where the latch 2 is in the unlocking position will be described. FIG. 3 is an explanatory diagram of the locking operation. FIG. 3A shows a state in which the latch 2 is in the unlocked position, as shown in FIGS. 1 and 2, and the engaging edge 2 d of the latch 2 is the left side wall of the base frame 3. The latch 2 is in an unlocked position in contact with the inner surface of 5, and the latch 2 is exposed to the side slightly from the slit 6 a formed in the right side wall 6. The contact arm 19 faces downward, and the forced unlocking operation lever 20 has a contact projection 20 b parallel to the left side wall 5 of the base frame 3.

  The unlocking cam 27 is in a position where the cylindrical body 31 attached to the unlocking cam 27 is in contact with the guide end edge 2 c of the latch 2 by the urging force of the coil spring 32. In this state, the unlock key 18 inserted into the second cylinder lock 8 cannot be removed. In this state, the unlocking key 18 inserted into the second cylinder lock 8 has the protrusion 26a of the unlocking operation member 26 substantially in contact with the guide edge 2c of the latch 2 and becomes an obstacle. Almost no clockwise rotation is possible, and the right claw of the rotation restricting plate 24 provided on the lock shaft 10 of the second cylinder lock 8 shown in FIG. As a result, it cannot rotate clockwise. There is a slight gap between the second shaft portion 30b (see FIG. 2) and the forced unlocking contact edge 20c of the forced unlocking operation lever 20. Further, the protruding portion 26 a of the unlocking operation member 26 is in a state of being substantially in contact with the engaging portion 27 b of the unlocking cam 27.

  In this state, when the lock key 39 is inserted into the first cylinder lock 7 and rotated in the locking direction, the abutting arm 19 rotates counterclockwise together with the lock shaft 9 of the first cylinder lock 7 and is attached to the latch 2. The latch 2 is in contact with the first shaft portion 23b, and then the latch 2 is in contact with the first cylinder lock while resisting the urging force of the coil spring 32 while the contact arm 19 and the first shaft portion 23b are in contact with each other. 7 is rotated counterclockwise around the axis of the lock shaft 9 and protrudes laterally from the right side wall 6 (see FIG. 3B). The rotation of the latch 2 from the unlocked position around the lock shaft 9 of the first cylinder lock 7 to the locked position is guided by the urging force of the coil spring 32 among the cam contact edges of the latch 2. 2c and the cylindrical body 31 of the unlocking cam 27 are in contact with each other. In the unlocked state, it is obvious that the contact arm 19 and the first shaft portion 23b of the latch 2 may be in contact with each other.

When the latch 2 is rotated to the locking position, the unlocking cam is instantaneously released by the urging force of the coil spring 32 from the contact between the cylindrical body 31 of the unlocking cam 27 and the guide end edge 2c of the latch 2. The cylindrical body 31 and the engagement edge 2d of the latch 2 are switched to contact with each other, and the latch 2 is locked in the locked position (see FIG. 3C).
The lock shaft 9 of the first cylinder lock 7 is rotatable according to the degree of opening of the claw of the rotation restricting plate 16, and can be rotated in the direction opposite to the locking direction. Accordingly, when the locking key 39 is operated in the direction opposite to the locking direction in the locked state, the abutment arm 19 is rotated in the clockwise direction together with the lock shaft 9, and the position at the start of the locking operation in FIG. Returning to the position, the lock key 39 can be removed from the first cylinder lock 7.

  3C, the protrusion 26a of the unlocking operation member 26 is not brought into contact with the guide end edge 2c of the latch 2, so that it is inserted into the second cylinder lock 8. The unlocking key 18 can be rotated in the opposite direction to the unlocking direction, and the unlocking operation member 26 is operated to rotate the unlocking operation member 26 together with the lock shaft 10 in the counterclockwise direction. When the projecting portion 26a of 26 is at the angular position of FIG. 3 (d), the unlocking key 18 can be extracted from the second cylinder lock 8. Therefore, the unlocking key 18 can be used for a key removal game.

  Next, the normal unlocking operation from the state where the latch 2 is in the locking position will be described. FIG. 4 is an explanatory diagram of the unlocking operation. In FIG. 4A, the latch 2 is in the locking position, and the locking key 39 is removed from the first cylinder lock 7 while the unlocking key 18 is inserted into the second cylinder lock 8. As shown.

  In this state, when the unlocking key 18 is turned in the unlocking direction, the unlocking operation member 26 is rotated in the clockwise direction together with the lock shaft 10 of the second cylinder lock 8, and as shown in FIG. 4 (b). The protruding portion 26 a of the locking operation member 26 engages with the engaging portion 27 b of the unlocking cam 27. When the unlocking key 18 is further rotated, the unlocking cam 27 along with the unlocking operation member 26 and the unlocking operation member 26 are engaged with each other in the clockwise direction while the projection 26a and the engaging portion 27b are engaged. And the contact between the cylindrical body 31 of the unlocking cam 27 and the engaging edge 2d of the latch 2 is released. Then, due to the urging force of the coil spring 32, the latch 2 instantaneously rotates clockwise about the lock shaft 9 of the first cylinder lock 7 and comes into contact with the inner surface of the left side wall 5 of the base frame 3. Return to the unlocked position (see FIG. 4C). As a result, the unlock key 18 cannot be removed from the second cylinder lock 8, and returns to the initial state shown in FIG.

  Next, a forced unlocking operation from a state where the latch 2 is in the locking position will be described. FIG. 5 is an explanatory diagram of the forced unlocking operation. FIG. 5A shows a state in which the latch 2 is in the locking position, and the unlocking key 18 is removed from the second cylinder lock 8, while the locking key 39 is inserted into the first cylinder lock 7. Show.

  In this state, when the lock key 39 is turned in the direction opposite to the lock direction, the abutting arm 19 is rotated clockwise together with the lock shaft 9 of the first cylinder lock 7 and is forced as shown in FIG. It contacts the contact protrusion 20b of the unlocking operation lever 20. Next, the forced unlocking lever 20 rotates in the same direction as the contact arm 19, and the second shaft portion of the unlocking cam 27 is moved by the forced unlocking contact edge 20 c of the forced unlocking lever 20. 30b (refer to FIG. 2) is pushed and resists the urging force of the coil spring 32, and the unlocking cam 27 rotates clockwise about the axis of the lock shaft 10 of the second cylinder lock 8 to unlock. The contact between the cylindrical body 31 of the cam 27 and the engaging edge 2d of the latch 2 is released. Then, due to the urging force of the coil spring 32, the latch 2 instantaneously rotates clockwise about the lock shaft 9 of the first cylinder lock 7 and comes into contact with the inner surface of the left side wall 5 of the base frame 3. Return to the unlocked position (see FIG. 5C). As a result, the lock can be forcibly unlocked by the lock key 39.

Next, the case where the door locking device 1 is mounted on a locker door installed in a game center or the like will be further described as an example.
6 and 7 show a part of the locker, FIG. 6 is a plan view in which the door locking device 1 is mounted on the locker door, and FIG. 7 is a front view.

  The locker door 41 in FIGS. 6 and 7 is shown as a pivoting left opening door (so-called left hanging door), and the door locking device 1 uses the through holes 4a and 4a. A front plate 42 is attached to the front face of the door 41 so as to be screwed to the left end of the door 41 (not shown) and to cover the screw. The lock surface 7 a of the first cylinder lock 7 and the lock surface 8 a of the second cylinder lock 8 are exposed from the front plate 42. The front plate 42 projects from the left end of the door and is in contact with the front surface of the vertical frame 44. The door 41 is provided with a transparent window 45 so that prizes and the like stored in the locker can be seen from the outside.

6 and 7, a prize or the like (not shown) is stored in the locker, and the latch 2 of the door locking device 1 is locked in a locking portion 44 a provided in the vertical frame 44. is there. Since the door locking device 1 is in the locked state, the locking key 39 and the unlocking key 18 are removed.
The locked state shown in FIGS. 6 and 7 may be performed as follows. That is, the administrator or the like opens the door of an empty locker with an unlocking key, stores prizes in the locker, closes the door with the unlocking key 18, and then presses the locking key 39. Used to lock the first cylinder lock 7. By performing the locking operation with the locking key 39, the latch 2 rotates to the locking position around the axis of the lock shaft 9 as apparent from the above, and the locker can be brought into the locked state. Thereafter, the lock key 39 and the unlock key 18 are removed.

  In the locked state shown in FIGS. 6 and 7, the administrator or the like keeps the lock key 39 at hand and uses the unlock key 18 for the game. When the player obtains the unlocking key 18 used for the specific locker by the game and performs the unlocking operation of the second cylinder lock 8 with the unlocking key 18, the latch is made clear as described above. 2 becomes an unlocking position, and a prize can be obtained by opening the locker door. The door locking device 1 returns to the initial state (see FIG. 3A) in which the unlock key 18 cannot be removed from the second cylinder lock 8.

When the player does not unlock the door using the acquired unlocking key 18 and brings the unlocking key 18 back, the administrator or the like operates the locking key 39 to lock the shaft 9 of the first cylinder lock 7. As is clear from the above description, the latch 2 can be returned from the locked position to the unlocked position in contact with the left side wall 5 and the door 41 can be opened simply by rotating the lever in the anti-locking direction.
Thus, according to this door locking device, locking is performed simply by performing the locking operation of the first cylinder lock with the locking key, and is simple. In addition, simply by unlocking the second cylinder lock with the unlock key, the latch returns instantaneously to the unlocked position, and the latch cannot be temporarily maintained even in the middle. Open the door by operating the unlocking key until the door can only be unlocked, and then return the unlocking key to the state before the operation and put the latch in the locked position, For example, it is only possible to win prizes and the like stored in the locker, and the unlock key cannot be removed from the second cylinder lock for mischief or fraudulent purposes.

  When the player brings the unlocking key back without opening the locker door using the acquired unlocking key, the administrator or the like operates the locking key to reverse the lock shaft of the first cylinder lock. It can be unlocked simply by rotating in the locking direction, and the occurrence of trouble can be prevented by removing the door locking device from the locker and replacing the second cylinder lock. If the lock key of the door lock device attached to a large number of lockers is used as a common key, the locker doors can be unlocked with only one lock key. When exchanging all at once, it is only necessary to forcibly unlock sequentially with only one locking key as a common key, and the trouble of unlocking the locker using a different unlocking key for each locker can be omitted.

The door locking device has a small number of parts, has a simple structure, is unlikely to fail, and is robust, compact, easy to assemble, and low in manufacturing cost.
In FIGS. 6 and 7, the door locking device is illustrated as being attached to the left door of the locker. However, the door locking device may be mounted to the vertical frame of the locker. When the door locking device is attached to the vertical frame of the locker, the door opens to the right. Moreover, if the door locking device is turned upside down, it can be mounted on the right-hand door. Needless to say, the door locking device may be mounted on the upper door or the lower door.

  Moreover, it is good also as a door locking device which formed the notch engaging claw part 53 for door locking in the latch 52 like the locking device 51 shown in FIG. According to this, not only a rotation type door but also a sliding type door can be locked.

  The door locking device of the present invention is not limited to the above-described embodiment, and various modifications can be made. For example, in the door locking device in FIG. 1, the engaging edge of the latch is linear, but the present invention is not limited to this, and it is sufficient that the latch can be abutted and engaged by the unlocking cam. The edge may be an engagement edge that is concave inward. In addition, a male screw provided with a first shaft portion is screwed into the female screw of the latch, but a structure in which a through hole is provided in the latch and a pin or the like is implanted therein, or by press working or the like A structure in which a protrusion is formed on the latch and the protrusion and the contact arm are in contact with each other can be adopted.

  Also, a bearing is used to smoothly rotate the latch, forced unlocking lever, and unlocking cam around the axis of the lock shaft, but the bearing is not necessarily required. A latch provided with a rotation hole, a forced unlocking operation lever provided with a rotation hole, and an unlocking cam provided with a rotation hole may be directly fitted into the lock shaft. Also, the latch, the forced unlocking lever, and the unlocking cam may not be plate-like, for example, a part of which is formed into a thick block shape for reinforcement.

The left side wall of the base frame also functions as a stopper at the latch unlocking position. However, the present invention is not limited to this. For example, the stopper may be extended rearward on the front plate portion of the base frame. Good. Further, the engaging edge of the latch has two functions such as a function of contacting the stopper at the unlocked position of the latch and a function of contacting the contacting part of the unlocking cam at the latching position of the latch. However, the present invention is not limited to this, and separately, a protrusion that contacts the stopper at the unlocked position is formed on the latch, and the engaging edge of the latch may only contact the unlocking cam at the locked position. Good. Further, the base frame may not be U-shaped in plan view, and may be a flat plate corresponding to only the front plate portion. Further, the coil spring is hooked on the latch and the cam to apply the urging force. However, the present invention is not limited to this. For example, a rubber elastic body or the like may be used instead of the coil spring.
In the above, the case where the door locking device of the present invention is used as a locker door locking device installed in a game center or the like has been described, but the door locking device of the present invention is installed in a game center or the like. For example, it is suitable not only as a locker but also as a door locker for a locker for home delivery to deal with a case where there is no recipient.

When the door locking device of the present invention is used as a locker for home delivery to cope with the absence of the recipient, the lock key is for the home delivery company or the manager of the locker, and the unlock key is for the recipient And it is sufficient.
An example of how to use it is as follows. In other words, when the recipient is absent, the courier company simply stores the item to be delivered in the locker and carries out the locking operation of the first cylinder lock using the locking key that is held or received from the administrator. The door can be locked. The locking key and the unlocking key are extracted, and the unlocking key is put into a mail box or the like at the locked door of the recipient, and the locking key is stored by the delivery company or returned to the manager. The recipient confirms that the unlocking key of his / her locker has been removed, removes the unlocking key from the mailbox, etc., and uses the unlocking key to unlock the second cylinder lock of his / her locker. Just unlock the door and receive goods. The unlock key cannot be removed from the second cylinder lock and remains as it is.

  By the way, it is presumed that the recipient has not operated the unlocking key indefinitely, before confirming the safety of the item in the locker, or before the recipient operates the unlocking key and takes out the item from his locker. In addition, when the delivery company delivers another item again and the locker needs to be opened, the administrator etc. must unlock the locker using the lock key without using the unlock key. Will be able to. After an administrator or the like unlocks the locker with the lock key, confirms the safety of the item in the locker, or adds another item to the locker, it is only necessary to lock the locker with the lock key. The recipient takes out the unlocking key from the mailbox etc. and unlocks the locker as described above.

It is a partially exploded perspective view which shows one form of the locking device for doors of this invention. It is a disassembled perspective view except the back cover of the door locking device shown in FIG. It is explanatory drawing of locking operation of the door locking device shown in FIG. It is explanatory drawing of the normal unlocking operation of the door locking device shown in FIG. It is explanatory drawing of the forced unlocking operation of the door locking device shown in FIG. It is a top view which shows the state which mounted | wore the locker with the door locking device shown in FIG. It is a front view of the locker shown in FIG. It is explanatory drawing which shows the modification of the locking device for doors shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door locking device 2 Latch 2c Guide edge 2d Engagement edge 7 1st cylinder lock 8 2nd cylinder lock 9, 10 Locking shaft 18 Unlocking key 19 Arm for contact 20 Lever for forced unlocking operation 20b Contact Protruding portion 20c Forced unlocking contact edge 23b First shaft portion 26 Unlocking operation member 26a Protruding portion 27 Unlocking cam 27b Engaging portion 30b Second shaft portion 31 Tubular body 32 Coil spring 39 Locking key

Claims (5)

In the door locking device in which the first cylinder lock for locking and the second cylinder lock for unlocking are attached to the front plate portion of the base frame with the axes of the respective lock shafts parallel to each other,
The first cylinder lock is a lock whose lock shaft is rotatable by a predetermined angle by a lock key, and an abutment arm is attached to the lock shaft so as to be integrally rotatable, and a forced unlocking operation lever and Each latch is supported rotatably,
The latch has an abutting protrusion that can be brought into contact with the abutting arm by rotating the locking shaft of the first cylinder lock in the locking direction;
The forced unlocking operation lever has an abutting protrusion with which the abutting arm can abut by rotation of the locking shaft of the first cylinder lock in the anti-locking direction,
The second cylinder lock is a lock in which the lock shaft can be rotated by a predetermined angle by an unlock key, and the unlock key cannot be removed at the unlocking position of the latch, and the unlocking operation is performed on the lock shaft. The member is attached so as to be integrally rotatable, and the unlocking cam is rotatably supported.
The unlocking cam includes an engaging portion engageable with a projecting portion formed on the unlocking operation member by rotating the lock shaft of the second cylinder lock in the unlocking direction. When the lock shaft of the one cylinder lock is turned in the anti-locking direction, the abutment arm is brought into contact with the abutment protrusion of the forced unlocking operation lever, thereby forming the forced unlocking operation lever. A contact protrusion that can contact the contact edge for forced unlocking,
An elastic member is hooked on the latch and the unlocking cam, and by its biasing force, a cam contact end edge formed of a guide end edge and an engagement end edge formed on the latch, and the unlocking cam. The formed contact part comes into contact,
The latch can be stopped by a stopper at the unlocking position ,
At the unlocking position where the latch is in contact with the stopper, the unlocking key cannot be removed from the second cylinder lock, and the first cylinder lock is unlocked by the locking operation of the first cylinder lock with the locking key. When the lock shaft is rotated in the locking direction, the abutment arm abuts against the abutment projection of the latch, resisting the biasing force of the elastic member, and the latching guide edge and the unlocking arm When the latch is rotated around the axis of the lock shaft of the first cylinder lock in a state where the abutting portion of the cam is in contact, the latch is engaged by the biasing force of the elastic member. Switching to the contact between the end edge and the contact portion of the unlocking cam, the unlocking key can be removed from the second cylinder lock,
In the locking state of the latch, by the unlocking operation of the second cylinder lock by the unlocking key, the locking shaft of the second cylinder lock is rotated in the unlocking direction, and the protruding portion of the unlocking operation member Is engaged with the engaging portion of the unlocking cam, and the unlocking cam is moved in the unlocking direction about the axis of the locking shaft of the second cylinder lock while resisting the biasing force of the elastic member. When the rotation is released and the contact between the contact portion of the unlocking cam and the engagement end edge of the latch is released, the latch is moved by the urging force of the elastic member to the lock shaft of the first cylinder lock. It rotates about the shaft center and returns to the unlocked position where it comes into contact with the stopper, or in the locked state of the latch, by the forced unlocking operation in the anti-locking direction of the first cylinder lock with the locking key When the lock shaft of the first cylinder lock is rotated in the anti-locking direction, the abutment The arm rotates to contact the contact protrusion of the forced unlocking lever, and the forced unlocking lever rotates in the same direction as the lock shaft of the first cylinder lock, and the forced unlocking The contact protrusion of the unlocking cam is pushed by the forced unlocking contact edge of the operating lever, and the unlocking cam is moved against the urging force of the elastic member to lock the unlocking cam When the contact between the contact portion of the unlocking cam and the engagement end edge of the latch is released, the latch is moved by the biasing force of the elastic member. A door locking device, wherein the door locking device is configured to rotate about an axis of a lock shaft of a one-cylinder lock and return to an unlocked position in contact with a stopper . In the door locking device in which the first cylinder lock for locking and the second cylinder lock for unlocking are attached to the front plate portion of the base frame with the axes of the respective lock shafts parallel to each other,
The first cylinder lock is a lock whose lock shaft is rotatable by a predetermined angle by a lock key, and an abutment arm is attached to the lock shaft so as to be integrally rotatable, and a forced unlocking operation lever and Each latch is supported rotatably,
The latch is plate-shaped, and is formed with a cam contact edge consisting of a guide edge and an engagement edge, and the contact arm is rotated by turning the lock shaft of the first cylinder lock in the locking direction. Has a contact protrusion that can contact, and the contact protrusion is erected from the front surface of the latch by screwing the male screw of the first shaft member into the female screw formed on the latch. Comprising a first shaft portion, the male screw extending a predetermined length from the back of the latch,
The forced unlocking operation lever has an abutting protrusion with which the abutting arm can abut by rotation of the locking shaft of the first cylinder lock in the anti-locking direction,
The second cylinder lock is a lock in which the lock shaft can be rotated by a predetermined angle by an unlock key, and the unlock key cannot be removed at the unlocking position of the latch, and the unlocking operation is performed on the lock shaft. The member is attached so as to be integrally rotatable, and the unlocking cam is rotatably supported.
The unlocking cam has a plate-like shape, and can be engaged with a protrusion formed on the unlocking operation member by rotating the locking shaft of the second cylinder lock in the unlocking direction. The forced unlocking is performed when the contact arm comes into contact with the contact protrusion of the forced unlocking operation lever by rotating the joint shaft and the locking shaft of the first cylinder lock in the anti-locking direction. A contact protrusion formed on the lever for contact with which the contact edge for forced unlocking can contact is provided, and the corresponding contact protrusion is formed on the second screw on the female screw formed on the unlocking cam. It consists of a second shaft erected from the front surface of the unlocking cam by screwing the male screw of the member, and the male screw extends a predetermined length from the back surface of the unlocking cam and extends A cylindrical body is loosely fitted to the male screw to be a contact portion that contacts the cam contact edge of the latch,
Extension of the male screw further extended from the tubular body loosely fitted to the male screw extension of the first shaft member of the latch and the male screw of the second shaft member of the unlocking cam An elastic member is hooked on the portion, and by the biasing force, the cam contact edge of the latch and the contact portion of the unlocking cam come into contact with each other,
The latch can be stopped by a stopper at the unlocking position,
At the unlocking position where the latch is in contact with the stopper, the unlocking key cannot be removed from the second cylinder lock, and the first cylinder lock is unlocked by the locking operation of the first cylinder lock with the locking key. When the lock shaft is rotated in the locking direction, the abutment arm abuts against the first shaft portion which is the abutment projection of the latch, and resists the urging force of the elastic member, while the guide end of the latch When the latch pivots around the axis of the lock shaft of the first cylinder lock in a state where the edge and the contact portion of the unlocking cam are in contact, the biasing force of the elastic member causes , Switching to the contact between the engaging edge of the latch and the contact portion of the unlocking cam, the unlocking key can be removed from the second cylinder lock,
In the locking state of the latch, by the unlocking operation of the second cylinder lock by the unlocking key, the locking shaft of the second cylinder lock is rotated in the unlocking direction, and the protruding portion of the unlocking operation member Is engaged with the engaging portion of the unlocking cam, and the unlocking cam is moved in the unlocking direction about the axis of the locking shaft of the second cylinder lock while resisting the biasing force of the elastic member. When the rotation is released and the contact between the contact portion of the unlocking cam and the engagement end edge of the latch is released, the latch is moved by the urging force of the elastic member to the lock shaft of the first cylinder lock. It rotates about the shaft center and returns to the unlocked position where it comes into contact with the stopper, or in the locked state of the latch, by the forced unlocking operation in the anti-locking direction of the first cylinder lock with the locking key When the lock shaft of the first cylinder lock is rotated in the anti-locking direction, the abutment The arm rotates to contact the contact protrusion of the forced unlocking lever, and the forced unlocking lever rotates in the same direction as the lock shaft of the first cylinder lock, and the forced unlocking The second shaft portion, which is the contact protrusion of the unlocking cam, is pushed by the forced unlocking contact edge of the operating lever, and the unlocking cam is moved against the urging force of the elastic member. By rotating in the unlocking direction around the lock shaft of the two-cylinder lock and releasing the contact between the contact portion of the unlocking cam and the engagement edge of the latch, the biasing force of the elastic member The door locking device according to claim 1, wherein the latch is rotated about the axis of the lock shaft of the first cylinder lock so as to return to the unlocked position in contact with the stopper . The latch is a plate, the cam abutment edge of the latch is made arcuate guide edges and straight engagement edges, the abutment protrusion of the latch is formed in latch A first shaft portion erected from the front surface of the latch by screwing the male screw of the first shaft member to the female screw, and the male screw extends a predetermined length from the rear surface of the latch,
The unlocking cam is plate-shaped, and the contact protrusion of the unlocking cam is released by screwing the male screw of the second shaft member into the female screw formed on the unlocking cam. The male shaft extends from the rear surface of the unlocking cam by a predetermined length, and a cylindrical body is loosely fitted to the male screw so that the latch is It is a contact portion that contacts the cam contact edge ,
The elastic member is hooked to the extension part of the male screw of the first shaft member and the extension part of the male screw further extended from the cylindrical body loosely fitted to the male screw of the second shaft member. The door locking device according to claim 1, wherein the door locking device is provided. It said elastic member is a door for locking device according to claim 1, 2 or 3, wherein a is a coil spring. The door locking device according to claim 1, 2 , 3, or 4 , wherein the stopper is a side wall standing rearward from a front plate portion of the base frame.

Images