JP2008014084A - Lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock device improved in operability and reliability by forcibly moving a door into a lockable position even when incomplete door closing operation is performed. <P>SOLUTION: The lock device comprises a locking part 5 having a locking body 4 lockable in a door closed state to a strike 3 fixed to one of the door and a device case to which the door is connected, and inhibiting door opening operation by regulating lock release between the strike 3 and the locking body 4 in the locked state, and a door lead-in part 7 fixed to one of the door and the device casing to forcibly move the door into a door closing completed position where the locking body 4 and the strike 3 are lockable by a locking part 6 locked to a locked member fixed to the other of the door and device case. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a locking device.

As a lock device used for a mailbox, the one described in Patent Document 1 is known. In this conventional example, the lock device has a cannula and a lock mechanism that are engaged with a metal fitting (strike) fixed to a receiving box main body (device housing). The strike and the kanuki are locked when the door is closed, and when the lock mechanism is locked in this state, the lock member restricts the movement of the kanuki and the door cannot be opened.
JP 2002-332766 A

  However, in the above-described conventional example, locking with the lock member of Kanuki is possible only when the door is completely closed, so the user confirms whether the door is completely closed during the locking operation. There is a disadvantage that it is necessary and troublesome.

  In the above-described conventional example, the locking operation is a specification that is directly performed by the user. However, for example, when automatic locking with an electric lock or the like is performed, the door is left in an unlocked state without the user's knowledge. There is also a risk of being done.

  The present invention has been made to eliminate the above drawbacks, and improves operability and reliability by forcibly moving the door to the lockable position even when incomplete door operation is performed. An object is to provide a locked device.

According to the present invention, the object is
The strike 3 fixed to either the door 1 or the device housing 2 to which the door 1 is connected is provided with a locking body 4 that can be locked in a closed state, and the engagement between the strike 3 and the locking body 4 in the locked state. A locking part 5 that restricts the unlocking and disables the opening operation;
The door 1 can be locked to the lock body 4 and the strike 3 by a locking portion 6 that is fixed to either the door 1 or the apparatus housing 2 and is locked to a locked member fixed to the other. A door retracting portion 7 forcibly moving to a door closing completion position;
This is achieved by providing a locking device comprising:

  The locking device has a locking portion 5 fixed to either the device housing 2 or the door 1 connected thereto, and locks the locking body 4 provided in the locking portion 5 to the counterpart strike 3. As a result, the closed state is maintained. When the locking part 5 is in the locked state, the unlocking of the locking body 4 and the strike 3 is restricted and the door closing operation is impossible, and when the locking part 5 is in the unlocked state, the locking of the locking body 4 and the strike 3 is released. Alternatively, the unlocking is released by the opening door 1 operating force, and the opening door 1 operation becomes possible.

  The door retracting portion 7 is capable of locking the strike 3 by the lock body 4 by a locked member fixed to either the door 1 or the device housing 2 to which the door 1 is connected in accordance with the closing operation. When it moves toward the door closing completion position and reaches the near side, the locking portion 6 locks the locked member and forcibly moves it to the door closing completion position.

  As a result, since the door 1 is reliably driven to the lockable position, it is not necessary to confirm that the door 1 is in the lockable position or to press the door 1 to move to the position. In addition, when the locking operation is performed automatically or remotely by using the actuator 13 such as a solenoid, the user often leaves the place without confirming whether the locking operation is normally completed. However, according to the present invention, since the movement of the strike 3 to a position where the strike 3 can be locked is ensured, the reliability of the locking operation is improved.

  One of the locking part 5 and the door retracting part 7 can be arranged in the door 1 and the other in the apparatus housing 2, but both can be arranged in the same element, for example, the apparatus housing 2. In this case, the strike 3 can also be used as a locked member.

  The locking body 4 can be configured to be driven in one-to-one correspondence with the locking / unlocking operation to the locking part 5, and can be configured so that the locking body 4 cannot be driven without operating the locking part 5. However, the usability can be improved by allowing the locking body 4 to move alone under the condition of the non-locking state with the strike 3.

  That is, the locking body 4 is urged toward the locking position with the strike 3 so as to be movable between the locking position and the locking release position, and the door is closed on at least one of the strike 3 or the locking body 4. When the cam surface 8 that generates a component force toward the unlocking position side is formed on the locking body 4 when the door 1 moves to the completion position side, the door 1 is not at the closing completion position, and the locking body 4 is in contact with the strike 3. Even in the lockable position, when the strike 3 comes into contact with the lock body 4 in accordance with the closing operation, the lock body 4 once moves to the lock release position side against the biasing force and receives the strike 3. After that, it can be locked to the strike 3. As a result, even if the locking unit 5 is locked, the locking operation can be performed without operating the locking unit 5 again.

  The door retracting portion 7 is configured to drive the locking portion 6 between a locking position with the locked member and a door closing completion position. An actuator 13 such as a solenoid can be used as the driving means for the locking portion 6, but if a spring 9 that biases the locking portion 6 toward the door closing position side is used, a power source becomes unnecessary. The structure is simple and the cost can be reduced.

  The spring 9 accumulates an urging force that urges the locking portion 6 toward the door closing completion position. When the door closing operation is performed, the accumulated urging force is released and the locked member is moved to the door closing completion position. Let Accumulation of the urging force to the spring 9 is to restrain the movement of the locking portion 6 toward the door closing completion side by an appropriate stopper means after the spring 9 is bent using the operating force when the door 1 is operated. This can be achieved by releasing the urging force by releasing the restraint by the stopper means during the closing operation. As the spring 9, an appropriate one such as a compression spring, a tension spring, a torsion spring, or the like can be used.

  As described above, the use of the spring 9 as the driving means can reduce the cost and the like, but on the other hand, the locking portion 6 suddenly moves as the restraint is released by the stopper means and collides at the end of the stroke. Since there is a problem that contact sound is generated, it is desirable to provide the door retracting portion 7 with the damper portion 10 to reduce the moving speed of the locking portion 6.

The locking portion 6 moves to the locking position with the locked member by detecting that the locked member has reached the locking position with the locking portion 6, and thereafter the locked member is moved to the locked position. Drive to the closed position. In addition to electronic means such as sensors, mechanical means can be used for detecting the locked member.
An interference portion 11 that enters the movement path of the locked member when the locking portion 6 is in the unlocking position with the locked member;
The interference portion 11 comes into contact with the locked member that moves toward the door closing position side and is rejected from the movement path, and moves the locking portion 6 to a locking position with the locked member in synchronization with the discharging operation. It can be constituted as follows.

  When the locking portion 6 is operated in synchronization with the interference of the interference portion 11, even if the closing operation is performed vigorously, the locking member immediately locks by the contact with the interference portion 11 of the locked member. Since the operation is completed, incomplete locking due to the rebound of the door 1 can be reliably prevented.

  According to the present invention, even when an incomplete door closing operation is performed, the door 1 can be forcibly moved to the lockable position, so that the operability and reliability can be improved.

  FIG. 1 shows an embodiment of the present invention applied to a mailbox. As shown in FIG. 1, the mailbox is formed by partitioning the inside of a mailbox body (apparatus housing 2) in the vertical direction by a partition plate 2a, and the opening of each mail storage chamber 2b partitioned by the partition plate 2a is a door. 1 is occluded. The door 1 is a revolving door that is pivotally supported on one side by the postbox body and can rotate horizontally. A strike 3 that also serves as a locked member is fixed in the vicinity of the rotating edge. The door 1 is given a biasing force in the closing direction by a torsion spring 1b wound around the rotation shaft 1a.

  As shown in FIG. 2, the locking device is formed by housing a locking part 5 and a door retracting part 7 in a casing 14. The casing 14 is provided with an insertion opening 14a into which the strike 3 is inserted when the door is closed, and is fixed to the apparatus housing 2 using the attachment piece 14b.

  The door retracting portion 7 has a swing link 16 having a slider 15 connected to the rear end (hereinafter, the opening end side of the insertion opening 14a is referred to as “front” and the terminal end side of the insertion opening 14a is referred to as “rearward”). Guide pins 16 a are erected at the front and rear ends of the swing link 16 and are movably fitted in guide grooves 17 formed in the casing 14. As shown in FIG. 4, the guide groove 17 has a straight portion 17a parallel to the insertion opening 14a, and a stopper portion 17b that bends in a direction opposite to the insertion opening 14a with a predetermined curvature from the front end of the straight portion 17a. The guide pin 16a behind the moving link 16 is located at the rear end of the straight portion 17a in the locked state shown in FIG. 2A or the unlocked state shown in FIG. 3B.

  In the locked / unlocked state, the guide pin 16a in front of the swing link 16 is positioned on the straight portion 17a of the guide groove 17, and the swing link 16 is held in a posture parallel to the insertion opening 14a. When the swing link 16 moves forward from this state and enters the standby state shown in FIGS. 3A and 4A, only the front guide pin 16a moves to the stopper portion 17b and shifts to the inclined posture. To do.

  Further, the swing link 16 is provided with a spring hooking piece 16b, and the other end of the tension spring 9 whose one end is fixed to the casing 14 is connected. The tension spring 9 applies a backward biasing force and a clockwise rotational force in FIG.

  The swinging link 16 is provided with an interference portion 11 and a locking portion 6 projecting from the insertion opening 14a. As shown in FIGS. 2 and 4, the interference section 11 is placed in the insertion opening 14a in both the locked and unlocked state shown in FIGS. 2 (a) and 3 (b) or in the standby state as shown in FIG. 3 (a). As shown in FIG. 4B, the locking portion 6 has an insertion opening even in a shallow bending posture in which the front guide pin 16a moves to the boundary with the straight portion 17a of the stopper portion 17b. It is formed at a protruding height that retreats from 14a.

  The slider 15 is movable along the insertion opening 14a and is connected to the rear guide pin 16a of the swing link 16 so as to be rotatable about the same axis. A rotary damper (damper portion 10) is disposed in the vicinity of the slider 15, and a rack (not shown) of the slider 15 meshes with a pinion 10a fixed to the rotor of the rotary damper 10.

  Therefore, in this embodiment, in the standby state shown in FIG. 3A, the front guide pin 16a of the swing link 16 enters the stopper portion 17b and the rearward movement is restricted, so that the tension spring 9 The oscillating link 16 is held in this position even though there is a rearward urging force. This state corresponds to the door open state. When the door closing operation is started from this state and the strike 3 enters the insertion opening 14a, as shown in FIG. Hits the interference part 11 and imparts a counterclockwise rotational force to the swing link 16.

  At the tip of the strike 3, there are formed a locked portion 18 that can lock the locking portion 6 provided on the swing link 16 and a lock locking portion 19 that locks the locking body 4 described later. When the swinging link 16 further rotates by continuing the closing operation, the locking portion 6 is locked to the locked portion 18. When the swing link 16 rotates until the lock portion 6 is locked to the locked portion 18, the front guide pin 16a of the swing link 16 is detached from the stopper portion 17b and moved to the linear portion 17a.

  When the front guide pin 16a is detached from the stopper portion 17b, the locking portion 6 and the strike 3 locked to the locking portion 6 are moved backward by the urging force of the tension spring 9, and FIG. As shown in FIG. 3B, the lock locking portion 19 moves to a door closing completion position where locking by the locking body 4 is possible. When the front guide pin 16a is detached from the stopper portion 17b and the urging force of the tension spring 9 is applied, the locking portion 6 starts to retreat suddenly, but the slider 15 has a buffering force due to the rotary damper 10. Because of this, the locking portion 6 moves slowly rearward, so that unnecessary impact noise at the rear end of the stroke is prevented.

  At this time, the closing force of the torsion spring 1b mounted on the door 1 described above is used as the operating force for starting the operation of the door retracting portion 7, that is, the interference portion 11 is operated to lock the locking portion 6. The door 1 is automatically moved to the closing completion position without manually performing the closing operation if it is set larger than the operating force for engaging the portion 18 and operating the tension spring 9. Can do.

  Further, when the opening operation is performed from the closing completion position, the swing link 16 is pulled forward while increasing the deflection of the tension spring 9 as the strike 3 moves forward. When the strike 3 is further moved in the door opening direction, the front guide pin 16a of the swing link 16 reaches the boundary between the linear portion 17a and the stopper portion 17b, and then gradually moves toward the stopper portion 17b. The locking between the portion 6 and the locked portion 18 is released. By releasing the lock, the swing link 16 to which the clockwise rotational force is applied by the tension spring 9 moves to the tip of the stopper portion 17b, and shifts to a standby state.

  On the other hand, the locking part 5 has a solenoid (actuator 13), an intermediate part rotatably connected to the casing 14, a lever 20 whose one end is loosely fitted to the plunger 13a of the solenoid 13, and a pivot 20a of the lever 20 with respect to the casing 14 And a locking body 4 that is rotatable about the same axis. The solenoid 13 is a self-holding solenoid that holds the state without being energized. When the micro switch (state check switch 12) fixed to the casing 14 is changed from “OFF” to “ON”, the solenoid 13 shown in FIG. As shown in a), the plunger 13a is driven in the pop-out direction, and is driven in the return direction by a command from a control unit (not shown).

  In order to automatically perform the “ON” operation of the micro switch, a switch operation protrusion 15 a that turns on the micro switch when the slider 15 reaches the rear end of the stroke is provided at the rear end of the slider 15. It protrudes (refer FIG. 2 (a), FIG.3 (b)).

  The front end portion of the locking body 4 has a hook shape protruding toward the insertion opening 14a, and as shown in FIG. 2 (a), a locking position where the tip of the hook advances into the insertion opening 14a, and FIG. 3 (b). As shown in FIG. 3, the hook tip rotates between the locking release position where the hook tip is retracted from the insertion opening 14a. The locking body 4 is restricted in relative rotation toward the locking position by a stopper projection 20b provided on the lever 20, and is freely rotatable in the direction of the locking release position, and is wound around the pivot 20a. The torsion spring 21 is urged toward the contact direction with the stopper protrusion 20b, that is, toward the locking position.

  Therefore, in this embodiment, when the strike 3 is moved to the door closing completion position shown in FIG. 3B by the door retracting portion 7 described above, the switch operating projection 15a of the slider 15 changes the micro switch 12 to the “ON” state. The solenoid 13 is excited. By the excitation of the solenoid 13, as shown in FIG. 2 (a), the plunger 13a is driven in the protruding direction, and the lever 20 rotates clockwise.

  With the rotation of the lever 20, the locking body 4 urged toward the stopper projection 20 b by the torsion spring 21 also rotates, and the hook tip is locked to the lock locking portion 19. Since the locking state of the lock locking part 19 and the locking body 4 is set so that a rotational force in the locking releasing direction is not generated in the locking body 4 due to the forward movement of the lock locking part 19, Thereafter, the strike 3 is moved forward, that is, the locked state in which the opening 1 operation is impossible.

  When a control button or the like (not shown) is operated from this locked state, the plunger 13a of the solenoid 13 is retracted as shown in FIG. 3 (b), and the lever 20 rotates counterclockwise. As the lever 20 rotates, the locking body 4 is pushed by the stopper projection 20b and rotates counterclockwise to release the engagement between the hook tip and the lock engagement portion 19, and the door 1 can be operated thereafter. (Unlocked state).

  Further, as shown in FIG. 5A, even if the solenoid 13 is driven in the locking direction in the opened door 1 state due to mischief or the like, a cam surface 8 formed of an inclined surface is formed at the front end of the locking body 4. Since it is formed, the locking operation from the state is allowed. That is, when the strike 3 enters the insertion opening 14a from the state shown in FIG. 5A, the tip of the strike 3 comes into contact with the cam surface 8, and the locking member 4 has a counterclockwise rotational force component. appear. Since the locking body 4 is allowed to idle with respect to the lever 20 in this direction, the locking body 4 once rotates to the unlocking position side and receives the strike 3 as shown in FIG. 5 (b). The process shifts to the locked state shown in FIG.

  Further, in this embodiment, as shown in FIG. 5, the swing link 16 is connected to a link body 22 in which the spring hooking piece 16b and the interference portion 11 are integrally formed, and a locking member 23 made of synthetic resin is connected. Formed. The locking member 23 is rotatably connected to the front end of the link main body 22 using a pivot shaft 24, and the locking member 6 is connected to the link main body 22 so that the rear end protrudes toward the insertion opening 14a. Elastic legs 23a extending obliquely rearward from the connecting portion to the link body 22 are formed.

  In the state where the locking member 23 is connected to the link body 22, the elastic legs 23 a are pressed against the leg receiving portions 22 a of the link body 22 to obtain a clockwise urging force. In order to restrict the rotation stroke of the locking member 23, the locking member 23 is provided with a stopper piece 23b.

  Therefore, in this embodiment, the locking member 23 maintains the posture in which the locking portion 6 protrudes from the link body 22 due to the restoring force of the elastic leg 23a, and during normal operation, the link body 22 and the locking member 23 Operate substantially in one piece.

  On the other hand, as shown in FIG. 5 (a), the door retracting portion 7 erroneously shifts to the locked posture with the locked portion 18 in the opened state, that is, the locked portion 18 is not locked. When the strike 3 enters the insertion opening 14a in this state, as shown in FIG. 5B, a force in a direction in which the strike member 3 is discharged from the insertion opening 14a is applied to the locking member 23. As described above, since the locking member 23 is formed of a synthetic resin material and has an elastic deformability, the elastic leg 23a and the whole elastically deform to allow passage of the strike 3.

  Thereafter, the door closing operation is further continued, and when the locked portion 18 of the strike 3 faces the locking portion 6, the locking member 23 returns to the original posture by the elastic restoring force. As a result, the locking portion 6 is Locking to the locked portion 18 eliminates an abnormal state due to a malfunction.

It is a figure which shows the mailbox with the locking device by this invention attached, (a) is a front view, (b) is a side view, (c) is a top view which shows the state which opened the door. It is a figure which shows a locking device, (a) is sectional drawing which shows a locking state, (b) is a 2B direction arrow directional view of (a), (c) is a perspective view. It is a figure which shows operation | movement of a locking device, (a) is a figure which shows a standby state, (b) is a figure which shows an unlocking state. It is explanatory drawing which shows operation | movement of a door drawing-in part, (a) is a figure which shows the approach start state of strike, (b) is a figure which shows the state which a latching | locking part latches to a to-be-latched part. It is a figure which shows operation | movement of a locking member, (a) is a figure which shows an abnormal state, (b) is a figure which shows the state which a locking member elastically deforms and receives a strike.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door 2 Apparatus housing 3 Strike 4 Locking body 5 Locking part 6 Locking part 7 Door drawing-in part 8 Cam surface 9 Spring 10 Damper part 11 Interference part 12 State confirmation switch 13 Actuator

Claims (6)

The strike fixed to either the door or the device housing to which the door is connected is provided with a locking body that can be locked in the closed state, and the unlocking of the strike and the locking body is restricted and released in the locked state. A locking part that disables the door operation,
The door is forcibly moved to the closing completion position where the locking body and the strike can be locked by a locking portion that is fixed to either the door or the device housing and is locked to the locked member fixed to the other. A door pull-in portion to be
A locking device comprising: Provided with a locking body that can be locked in a closed state to a strike that is fixed to either the device housing or a door that is applied with a biasing force in the closing direction and is connected to the device housing, and in the locked state, the strike and the locking body A locking part that restricts the release of the lock and disables the opening operation,
The locking member and the strike are fixed to either the door or the apparatus housing by an urging force applied to the door, and the locking member and the strike are locked to a locked member fixed to the other. A door pull-in portion that forcibly moves to a lockable closing position of
A locking device comprising: The locking body is urged toward a locking position with the strike and is movable between a locking position and a locking release position,
The cam surface for generating a component force to the lock release position side when the door is moved to the door closing completion position is formed on at least one of the strike or the lock body. Locking device. The locking portion of the door retracting portion accumulates a biasing force that biases the locking portion toward the door closing completion position, and is driven by a spring that releases the biasing force by the door closing operation.
The locking device according to claim 1, 2, or 3, wherein the door retracting portion is provided with a damper portion that reduces a moving force of the locking portion by reducing a spring biasing force releasing speed. An interference portion that enters the movement path of the locked member when the locking portion is in the unlocking position with the locked member;
The interfering portion comes into contact with a locked member that moves toward the door closing completion position and is rejected from the moving path, and moves the locking portion to a locking position with the locked member in synchronization with the discharging operation. 5. The locking device according to any one of 1 to 4. A state confirmation switch for detecting movement of the locking portion to the door closing completion position;
The locking device according to any one of claims 1 to 5, wherein movement of the locking body 4 to a locking position is performed by an actuator driven by the state confirmation switch.

Images