JP2005240460A - Lock device for door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely unlock a door even if a back pressure is exerted on the door because a large piece of luggage is put in a locker. <P>SOLUTION: This lock device 1 for the door is equipped with a turnable lock plate 6 with which a hook 15 of the door can be engaged, a first elastic member 22 for urging the lock plate in an unlocking direction, a turnable stopper arm 8 for abutting on an abutting part 21 of the lock plate so as to maintain a locking state, a driving lever 9 which is connected by means of a second elastic member 28 for urging the stopper arm 8 in a locking direction, a driving means 3 for making the driving lever advance/retreat, and a turnable stopper release arm 11 for urging the stopper arm in an unlocking direction by means of a third elastic member 35 with a stronger urging force than that of the second elastic member in a section up to abutment on an abutting part 33 of the driving lever. The lock plate 6 is set turnable in a locking direction in a state wherein the stopper arm 11 urges and turns the stopper arm 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a door locking device for locking and unlocking a rocker having a rotary door such as a coin locker or a delivery locker.

  7 to 8 show an embodiment of a conventional door locking device (see, for example, Patent Document 1).

  The door locking device 51 includes a rotary lock plate 53 that locks the hook 52 on the door side, a torsion spring 54 that biases the lock plate 53 in the unlocking direction, and unlocking the lock plate 53. A stopper arm 55 that prevents rotation in the direction, a drive lever 56 that rotates the stopper arm 55 in the unlocking direction, and an electric solenoid 57 that biases the driving lever 56 in the locking or unlocking direction. Is.

  The stopper arm 55 and the drive lever 56 are rotatably supported on the base plate 58 by the same support shaft 59, and are biased in the opening direction by the torsion spring 60 until the protrusions 61 and 62 near the lock plate come into contact with each other. ing. The lock plate 53 has a notch hole 63 for engagement with the hook 52 and a stepped portion 64 for contact with the stopper arm 55 on the opposite side, and is rotatably supported on the base plate 58 by a support shaft 65. .

  The drive lever 56 is connected to the plunger 66 of the solenoid 57 at a portion opposite to the protrusion 62, and the plunger 66 is biased by the coil spring 67 in the protruding direction. In FIG. 7, the plunger 66 is pulled in by excitation of the internal coil, and the stopper arm 55 prevents the lock plate 53 from rotating in the unlocking direction and keeps the locked state. The lock state of the lock plate 53 is detected by the micro switch 68.

  For example, as shown in FIG. 9, when the user of the rocker 69 inputs the password using the numeric keypad 70 from this locked state, the plunger 66 protrudes as shown in FIG. And the lock plate 53 are released, the lock plate 53 is rotated by the force of the torsion spring 54, the engagement with the hook 52 is released, and the lock plate 53 is unlocked.

In FIG. 9, reference numeral 71 denotes a handle of the door 72, 73 denotes a slit-like opening into which the hook 52 enters, and the lock plate 53 (FIG. 8) is located in the opening.
Japanese Patent No. 3443212 (pages 3 to 4, FIGS. 7 to 8 and FIG. 11)

  However, in the conventional door locking device 51, the locker user puts a large baggage into the rocker 69 and locks the baggage with the baggage pushing the door 72 in the opening direction from the inside (back pressure applied). 7, the hook 52 pushes the lock plate 53 in the unlocking direction (clockwise) in FIG. 7, and the lock plate 53 strongly contacts the stopper arm 55, so that the lock plate 53 is prevented from rotating. There was a concern that the door 72 would not open.

  In that case, the rocker user tries to open the door 72 by rattling back and forth (when the door 72 is pushed inward against the back pressure, the hook 52 slightly turns the lock plate 53 in the locking direction). And the unlocking operation force is transmitted to the stopper arm 55 through the plunger 66 and the drive lever 56, so that the plunger 66, the drive lever 56 and the stopper are released. There is a concern that a time lag occurs in the driving of the stopper arm 55 due to play between the arm 55 and the like, the contact between the lock plate 53 and the stopper arm 55 is difficult to be released, and unlocking is not performed smoothly.

  In view of the above, the present invention provides a door locking device that can be smoothly and reliably unlocked even when a large load is placed in a rocker and locking is performed with back pressure applied to the door. With the goal.

  In order to achieve the above object, a door locking device according to claim 1 of the present invention includes a rotatable lock plate for engaging a hook of a door, and a first biasing the lock plate in an unlocking direction. An elastic member, a rotatable stopper arm that abuts against the abutment portion of the lock plate and maintains a locked state, a drive lever connected by a second elastic member that urges the stopper arm in the locking direction, The stopper arm is unlocked by a third elastic member having a biasing force stronger than that of the second elastic member between the drive means for moving the drive lever forward and backward and the contact portion of the drive lever. And a pivotable stopper release arm that urges the actuator.

  With the above configuration, the lock plate and the hook on the door side are engaged, and the stopper arm comes into contact with the lock plate to prevent rotation in the unlocking direction.When back pressure is applied to the door in this state, the lock is applied. The plate and the stopper arm come into strong contact, but when the drive lever is rotated by the drive means in the direction in which the stopper arm is released, the contact portion of the drive lever moves away from the stopper release arm and the stopper release arm The strong biasing force of the third elastic member strongly presses the stopper arm against the biasing force of the second elastic member in the contact release direction, so the contact force (frictional force) between the lock plate and the stopper arm is compared. If the force is weak, the stopper release arm rotates the stopper arm in the contact release direction by the biasing force of the third elastic member, so that the lock plate rotates in the unlocking direction by the biasing force of the first elastic member. To. When the contact force between the lock plate and the stopper arm is strong, when the rocker user rattles the door back and forth and pushes it inward (when back pressure is removed), the stopper arm is pressed directly by the stopper release arm. Therefore, the stopper arm is immediately rotated in the direction of releasing contact with the lock plate, and the lock plate is rotated in the unlocking direction by the urging force of the first elastic member.

  Conventionally, the stopper arm is released from contact with the lock plate via the drive means and the drive lever, so that the stopper arm is abutted by an assembly backlash between the drive means, the drive lever, and the stopper arm. Although there was a time lag in rotating in the contact release direction, in the present invention, the stopper release arm drives the stopper arm in the contact release direction without time lag. The contact is released, and the lock plate is unlocked smoothly and reliably.

  The door locking device according to claim 2 is the door locking device according to claim 1, wherein the lock plate rotates in the locking direction in a state where the stopper release arm urges and rotates the stopper arm. It is characterized by being free.

  With the above-described configuration, the lock plate is moved in the state in which the drive means rotates the drive lever to the unlocked position and the stopper release arm urges and rotates the stopper arm in the contact release direction with the lock plate. The elastic member is rotated in the unlocking direction by the urging force of the elastic member. In this state, the door can be closed and the lock plate can be pressed and rotated in the locking direction by the hook. The stopper arm is rotated in the contact direction with the lock arm by the urging force of the second elastic member. Since the stopper release arm is in contact with the contact portion of the drive lever, it does not hinder the return of the stopper arm (rotation in the contact direction with the lock arm). In this way, the drive lever is first rotated to the unlocked position by the drive means, and then the door is closed and locked without any problem. Thereby, for example, operation of a solenoid as drive means in an electric lock and electrical steps (control program) related thereto can be quickly performed.

  According to the first aspect of the present invention, even when back pressure is applied to the door of the rocker, the contact between the stopper arm and the lock plate can be released by the action of the stopper release arm and the third elastic member. Therefore, the unlocking operation can be performed smoothly and reliably, whereby the function of the rocker is surely exhibited, and damage to the rocker and the locking device for forcibly opening the door is prevented.

  According to the second aspect of the present invention, the drive means can be operated first, and then the door can be closed and locked. For example, the electrical steps in the electric lock device can be quickly performed. This improves the quality and reliability of the lock device.

  1 to 6 show an embodiment of a door locking device according to the present invention.

  As shown in FIG. 1, the door locking device 1 is disposed between an electric solenoid (driving means) 3 fixed to a base plate 2 and a base plate 2 and a case 4, and is rotated by a first support shaft 5. A lock plate 6 that is movably supported, a stopper arm 8 that is rotatably supported by the second support shaft 7, and a second support shaft 7 that is rotatably supported by the solenoid 3. The drive lever 9 that is moved and the shaft 10 on the distal end side of the drive lever 9 are rotatably supported, and the stopper arm 8 is unlocked, that is, in the direction in which the contact between the lock plate 6 and the stopper arm 8 is released. A stopper release arm 11 for biasing is provided.

  The structure of the base plate 2, the case 4, the solenoid 3, the lock plate 6, and the stopper arm 8 is the same as that of the prior art.

  That is, the base plate 2 includes a fixing portion 12 fixed to the inner wall of the rocker (see FIG. 9) with screws, holes 14 for fixing the horizontal support shafts 5 and 7 with screws 13, and door hooks 15. It has a horizontal notch 16 for entering (FIG. 2). Similarly, the case 4 has a notch hole 17 through which the hook 15 enters and a boss portion 18 for fixing the support shafts 5 and 7.

  In FIG. 1, the lock plate 6 is disposed on the left half side of the base plate 2, the stopper arm 8 is disposed upward and adjacent to the lock plate 6 at approximately the center of the base plate 2, and the solenoid 3 is directed downward on the right half side of the base plate 2. Placed in.

  The lock plate 6 has a notched hole 19 having a downward curved shape for engaging the door hook 15 (FIG. 2) on one side, a hole 25 for inserting the first support shaft 5 in the middle, and a stopper on the other side. It has a stepped portion (contact portion) 21 for contacting the protruding plate portion 20 of the arm 8 and is biased in the unlocking direction (clockwise in FIG. 1) by the first torsion spring (elastic member) 22. .

  The torsion spring 22 has arms 22 a and 22 b protruding from both ends of the coil winding portion. One arm 22 a is locked to the small hole 23 of the base plate 2, and the other arm 22 b is the small hole 24 of the lock plate 6. It is locked to.

  The stopper arm 8 has a hole portion 26 that engages with the second support shaft 7 on the proximal end side, a protruding piece 27 bent on the distal end side, and is folded on one side portion near the intermediate lock plate. The protruding plate 20 is bent, and the upper end 20 a of the protruding plate portion 20 is a stepped portion for contact with the lock plate 6. A second torsion spring (elastic member) 28 is mounted on the second spindle 7, one arm 28 a of the torsion spring 28 is locked to one end of the stopper arm 8, and the other arm 28 b is driven. The lever 9 is locked in the small hole 29 in the middle.

  The drive lever 9 and the stopper release arm 11 are shaped like a conventional drive lever (FIG. 7) divided into two at the tip side.

  That is, the drive lever 9 has a notch hole 31 connected to the plunger 30 of the solenoid 3 on one side, and a horizontal pin portion that abuts the insertion hole 32 for the second support shaft 7 and the stopper release arm 11 in the middle. (Contact portion) 33, and the other side has a horizontal thin support shaft 10 that rotatably supports the stopper release arm 11.

  The stopper release arm 11 is formed in a substantially U-shape, has a hole 34 through which the support shaft 10 is inserted into the lower wide portion 11a, and a straight portion 11b narrowed upward from the wide portion 11a integrally. The straight portion 11 b can be brought into contact with the pin portion 33 of the drive lever 9 and the outer surface 20 b of the protruding plate portion 20 in the middle of the stopper arm 8.

  A third torsion spring (elastic member) 35 is mounted on the spindle 10 at the tip of the drive lever 9 (fixed with a washer or C-ring), and one arm 35 a of the torsion spring 35 is below the drive lever 9. The other arm 35b is locked to the end face near the upper end of the stopper release arm 11, and the stopper release arm 11 is connected to the base end side of the drive lever 9 by the torsion spring 35 (plunger connection). The stopper release arm 11 urges the stopper arm 8 in a direction to release the contact with the lock plate 6 (unlocking direction).

  The spring force of the third torsion spring 35 that biases the stopper release arm 11 in the unlocking direction is set to be stronger than the spring force of the second torsion spring 28 that abuts the stopper arm 8 against the lock plate 6. ing. Therefore, the contact between the stopper arm 8 and the lock plate 6 can be released by the stopper release arm 11 biased by the third torsion spring 35.

  This contact release operation is performed until the stopper release arm 11 contacts the pin 33 of the drive lever 9. After the stopper release arm 11 contacts the pin 33 of the drive lever 9, the stopper release arm 11 is operated. The urging force is received by the pin 33, and the protruding plate portion 20 of the stopper arm 8 is positioned in contact with the stopper release arm 11 by the urging force of the second torsion spring 28.

  The operation of the door locking device 1 will be described below with reference to FIGS.

  FIG. 2A is a front view showing a locked state of the door locking device 1, FIG. 2B is a side view showing the door locking device 1, and the side view of FIG. 3 to 6 are almost the same, and the following illustration is omitted. 2 to 6 are shown opposite to FIG.

  2A and 2B, reference numeral 2 denotes a base plate, and 4 denotes a case. The case 4 is bonded and fixed to the base plate 2, and the base plate 2 is fixed to the rocker side by a fixing portion 12.

  As shown in FIG. 2A, the lock plate 6 is engaged with the door-side hook 15 through a notch 19 on the front end side, and the upper end of the protruding plate portion 20 of the stopper arm 8 is connected to the step portion 21 on the rear end side of the lock plate 6. (Step part) 20a abuts (in FIG. 1, there is a small gap between the two step parts), and the first torsion spring 22 prevents the lock plate 6 from rotating in the unlocking direction. ing. The stopper arm 8 is biased in the locking direction toward the lock plate 6 by the second torsion spring 28.

  The stopper release arm 11 is in contact with the pin portion 33 of the drive lever 9 and is prevented from rotating by the third torsion spring 35. The stopper release arm 11 is in light contact with the stopper arm 8. The drive lever 9 is pulled up by the solenoid 3 in the pull-in direction of the plunger 30.

  The base plate 2 and the case 4 are provided with two upper and lower micro switches 36 and 37, the upper switch 36 is in contact with the protruding piece 27 at the tip of the stopper arm 8, and the lower switch 37 is in contact with the lower end of the lock plate 6. ing. Locking / unlocking is detected by the two switches 36 and 37, and the signal is sent to the control unit. The configuration and operation of the switches 36 and 37 are the same as in the prior art.

  FIG. 3 shows a back pressure load state in which a rocker user puts a large load into the locker and locks it, and the load presses the door from the inside to the outside.

  Due to this back pressure, the door is pushed in the opening direction, and the hook 15 of the door pulls the lock plate 6 outward, so that the lock plate 6 is slightly rotated in the unlocking direction, and the step 21 at the rear end is the stopper. The arm 8 is strongly pressed against the stepped portion 20a. The states of the stopper release arm 11, the drive lever 9, and the solenoid 3 are the same as the locked state of FIG.

  FIG. 4 shows a state in which the rocker user inputs the password using the numeric keypad and the control unit causes the solenoid 3 to perform the unlocking operation. Back pressure has not yet been released.

  The plunger 30 of the solenoid 3 protrudes (extends) by the force of the coil spring 38, the drive lever 9 is rotated in the push-down direction, and the pin portion 33 of the drive lever 9 is separated from the stopper release arm 11. As a result, the stopper release arm 11 strongly presses the stopper arm 8 in the unlocking direction (counterclockwise in FIG. 4) by the urging force of the third torsion spring 35. The stopper arm 8 remains biased toward the lock plate 6 by the second torsion spring 28.

  Here, when the back pressure is relatively weak, the force of the third torsion spring 35 overcomes the sum of the contact force between the lock plate 6 and the stopper arm 8 and the force of the second torsion spring 28. The stopper arm 8 is rotated in the unlocking direction. As a result, the contact between the stopper arm 8 and the lock plate 6 is released, and the lock plate 6 is rotated in the unlocking direction by the force of the first torsion spring 22, and the engagement between the notch hole 19 and the hook 15 is performed. The combination is released and unlocked.

  When the back pressure is high, the stopper release arm 11 presses the stopper arm 8 in the unlocking direction as shown in FIG. 4, but the contact between the stopper arm 8 and the lock plate 6 is not released, and the plunger 30 moves the drive lever 9. Will remain pressed down.

  The rocker user rattles back and forth trying to open the door. When the rocker user pushes the door inward, that is, in the back pressure removing direction, the door hook 15 slightly rotates the lock plate 6 in the locking direction as shown in FIG. At the same time that a slight gap is generated between the step portion 20a of the arm 8 or the contact force between the step portions 21 and 20a is weakened, the stopper release arm 11 is stopped by the biasing force of the third torsion spring 35. The arm 8 is pressed and rotated in the unlocking direction. The stopper release arm 11 presses and rotates the stopper arm 8 until it comes into contact with the pin portion 33 of the drive lever 9.

  When the contact between the stopper arm 8 and the lock plate 6 is released, the lock plate 6 is rotated in the unlocking direction by the force of the first torsion spring 22 as shown in FIG. The engagement with the hook 15 is released, and the door can be opened.

  Thus, even if the back pressure from the inside is applied to the door, the unlocking is smoothly and reliably performed by the action of the stopper release arm 11 and the third torsion spring 35.

  Further, as shown in FIG. 6, with the plunger 30 protruding and the stopper arm 8 substantially abutting against the lock plate 6 and prevented from rotating in the unlocking direction, the door hook 15 is inserted into the notch 19 in the lock plate 6. The door can be closed while entering. Thereby, the operation of the solenoid 3 can be performed before the door is closed, and each electrical step (flow) of the electric lock device (electric lock) can be quickly performed.

  As shown in FIG. 5, the hook 15 rotates the lock plate 6 in the locking direction from the state of FIG. 6 so that the microswitches 36 and 37 detect the state of the lock plate 6 and the control unit instructs the solenoid 3 to lock the lock plate 6. 2, the plunger 30 is retracted as shown in FIG. 2 and the drive lever 9 rotates upward, and the pin portion 33 rotates the stopper release arm 11 forward against the bias of the third torsion spring 35. The stopper arm 8 is rotated toward the lock plate 6 by the biasing force of the second torsion spring 28, and the stepped portion 20a of the stopper arm 8 and the stepped portion 21 of the lock plate 6 come into contact with each other so that the locked state is maintained. obtain.

  In the above embodiment, the operation lever 9 is rotated by the solenoid 3, but instead of the solenoid 3, the base end portion 9a (FIG. 2) of the drive lever 9 is driven by a motor, a rack and pinion, or the like. Alternatively, the drive lever 9 can be rotated mechanically in conjunction with another lever or the like.

  The door locking device 1 has a lock plate 6 and a solenoid 3 arranged vertically and a door-side hook 15 horizontally for application as a coin locker such as a station or various sports facilities or a delivery locker such as a condominium. However, the arrangement direction of the door locking device 1 is not limited to this, and for example, the lock plate 6 and the solenoid 3 can be arranged horizontally.

  It is also possible to provide a bent projecting piece portion or the like instead of the pin portion 33 of the drive lever 9 with which the stopper release arm 11 is brought into contact. Further, a pin portion or the like can be provided in place of the protruding plate portion 20 of the stopper plate 8 with which the stopper release arm 11 is brought into contact. In addition, a leaf spring, a compression or tension coil spring, a rubber member, or the like may be used as the elastic member instead of the first to third torsion springs 22, 28, and 35.

  Moreover, in the said embodiment, although the stopper arm 8 and the drive lever 9 are supported simultaneously by the 2nd spindle 7, the stopper arm 8 and the drive lever 9 are each supported by a respectively different spindle, or a stopper. It is also possible to support the arm 8, the drive lever 9, and the stopper release arm 11 with the same support shaft.

  Each of the support shafts 5, 7, and 10 is formed separately from the lock plate 6, the stopper arm 8, the drive lever 9, and the stopper release arm 11. However, these components 6, 8, 9, and 11 are made of metal. It is also possible to form the support shaft integrally with a synthetic resin material instead of the material.

  Further, the shapes of the lock plate 6, the stopper arm 8, and the stopper release arm 11 can be appropriately changed in design as required. Further, the direction of the solenoid 3 and the driving method (whether the drive lever 9 is rotated by the protrusion operation of the plunger 30 or the pull-in operation) can be changed as necessary.

  Further, like the conventional locking device described in Patent Document 1 and Japanese Patent No. 3410268, the drive lever 9 is interlocked with the emergency unlocking cylinder lock to add an emergency unlocking function at the time of a power failure or the like. It is also possible.

It is a disassembled perspective view which shows one Embodiment of the locking device for doors which concerns on this invention. (A) is a front view which shows the locking state (internal structure) of the door locking device, (b) is a side view of the door locking device. It is a front view which shows the state by which the back pressure was loaded on the door in the locked state. It is a front view which shows the state which operated the solenoid to the unlocking position in the back pressure load state. It is a front view which shows the state which pushed the door and removed the back pressure. It is a front view which shows the state unlocked completely. It is a front view which shows the locking state of one form of the conventional door locking device. It is a front view which similarly shows the unlocking state of the conventional door locking device. It is a perspective view which shows one form of the rocker provided with the locking device for doors.

Explanation of symbols

1 Door lock device 3 Solenoid (drive means)
8 Stopper arm 6 Lock plate 9 Drive lever 11 Stopper release arm 15 Hook 21 Step part (contact part)
22 Torsion-wound spring (first elastic member)
28 Torsion-wound spring (second elastic member)
33 Pin part (contact part)
35 Torsion-wound spring (third elastic member)

Claims (2)

  A pivotable lock plate that engages the door hook, a first elastic member that urges the lock plate in the unlocking direction, and a pivot that keeps the locked state in contact with the abutment portion of the lock plate A flexible stopper arm, a drive lever connected by a second elastic member for urging the stopper arm in the locking direction, a drive means for moving the drive lever back and forth, and a contact portion of the drive lever And a rotatable stopper release arm that biases the stopper arm in the unlocking direction with a third elastic member having a stronger biasing force than the second elastic member. apparatus.   2. The door locking device according to claim 1, wherein the lock plate is rotatable in a locking direction in a state where the stopper release arm biases and rotates the stopper arm.

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