JP5297984B2 - Lock opening prevention device for lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock forced-opening preventing device with even more protectiveness against forced opening from the outside. <P>SOLUTION: The lock forced-opening preventing device includes a hook lever 21 having a locking part 22 at one end to be hooked to the vertical side opening edge of a latch insertion opening P on the door side, and swingable in an advancing/retreating direction by a support part 24 provided at the other end, and a latch 31 having a locking protrusion 32 at the tip to be hooked to the longitudinal side opening edge of the latch insertion opening P on the door side, and slidable in the advancing/retreating direction along a slide guide groove 33 provided at the other end. Both the latch 31 and hook lever 21 have slide operating parts 28, 34 linked by the operating shaft 44 of a latch lever 16 rotatable in the locking/unlocking direction. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an unlocking prevention device for a lock that prevents forced opening from the outside of a door in a key system that allows a predetermined number of coins to be taken in and out of a coin locker, for example.

  The key system of the coin locker opens the door, puts the luggage into the coin locker, inserts a predetermined number of coins from the coin insertion slot, closes the door, and rotates the custom key inserted in the key cylinder in the locking direction in advance. After that, the user has this custom key.

  Conventionally, various protective means have been applied to the door against forced opening from the outside. For example, in the lock structure disclosed in Patent Document 1, the lock tongue piece is inserted into the door body by turning the key, and the lock structure for restricting the opening and closing of the door body has a front end on the insertion side of the lock tongue piece. This part is provided with a vertical groove.

  As a result, when the door is forcibly opened using a forcible device such as a bar screwdriver, the opening for inserting the locking tongue into the door body is stuck in the groove or caught in the groove. In order to limit further free movement of the door, it is assumed that the door is prevented from being opened.

JP 2002-242493 A

  However, in the conventional lock structure described above, the lock tongue piece is thickened so as to give a sufficient strength and to form a groove portion having a sufficient depth to be easily caught on the end panel of the door. When a strong external force is applied to the door, the end panel of the door may be broken and the door may be opened by applying an excessive load to the end panel of the door by the locking tongue. .

  Therefore, the present invention has been devised in view of the existing circumstances as described above, and provides a lock-off device for preventing the lock from being provided with further protection against forced-opening from the outside. The purpose is to do.

In order to solve the above-described problem, in the present invention, in the lock-opening prevention device that prevents the door after locking from being forcibly opened,
A cam lever that includes a locking portion at one end so as to be hooked to the upper and lower opening edges of the latch insertion opening on the door side, and is swingable in the forward and backward direction by a support portion provided at the other end;
It has a latching projection at the tip so that it can be hooked on the rear opening edge of the latch insertion opening on the door side, and has a latch that can slide in the forward and backward direction along the slide guide groove provided at the other end,
Both the latch and the kama lever have a slide operation portion that is linked and interlocked by an operation shaft of a latch lever that can rotate in a locking / unlocking direction,
When the latch lever rotates in the locking direction with the custom key, the cam lever moves the support portion in conjunction with the latch moving forward along the slide guide groove via the slide operation portion of the latch and the slide operation portion of the cam lever. By swinging in the forward direction as the rotation axis,
The latch protrusion at the tip of the latch is caught by the rear opening edge of the latch insertion opening of the door, and the latching portion at the tip of the cam lever is caught by the upper and lower opening edges of the latch insertion opening, so that the door does not open laterally. It is characterized by having become a thing .

Also, the rotation of the latch lever in the locking direction by the custom key causes the kama lever to rotate the support portion in conjunction with the forward movement of the latch along the slide guide groove via the slide operation portion linked to the operation shaft. It is characterized in that it swings in the forward direction as a shaft, and the locking portion of the kama lever is formed so as to be exposed in the vertical direction with respect to the forwardly moved latch .

Further, the rotation of the latch lever in the unlocking direction by the custom key causes the cam lever to move the support portion in conjunction with the backward movement of the latch along the slide guide groove via the slide operation portion linked to the operation shaft. The rotary shaft swings in the backward direction, and the locking portion of the cam lever is formed so as to be concealed in the up and down direction from the backward moving latch .

  ADVANTAGE OF THE INVENTION According to this invention, it can provide the lock opening prevention apparatus of a lock | rock provided with the further protection against the forced opening from the outside.

That is, according to the first aspect, when the latch lever is rotated in the locking direction by the custom key, the latch moves forward along the slide guide groove via the slide operation portion of the latch and the slide operation portion of the kama lever. In conjunction with the kama lever swinging in the forward direction with the support part as the rotation axis,
The latch protrusion at the tip of the latch is caught by the rear opening edge of the latch insertion opening of the door, and the latching portion at the tip of the cam lever is caught by the upper and lower opening edges of the latch insertion opening, so that the door does not open laterally. So that it would be something
When the door of the coin locker after being locked is forcibly opened with, for example, a screwdriver or the like, a double lock function can be provided for the latch insertion opening for preventing the opening of the coin locker, so that excellent protection performance can be provided. For example, when the door is forcibly opened, even if the end of the latch insertion opening is pushed away by the tip of a screwdriver or bar, for example, the latch protrusion of the latch is removed from the latch insertion opening, For example, the door is not easily opened because it is caught on the upper opening edge of the latch insertion opening.

According to the second aspect of the present invention, the latch is rotated in the locking direction by the custom key, and the latch is interlocked with the forward movement of the latch along the slide guide groove via the slide operation unit connected to the operation shaft. The camer lever swings in the forward direction with the support part as the rotation axis, and the locking part of the camer lever is formed so as to be exposed in the vertical direction with respect to the forwardly moved latch, so the door after locking the door of the coin locker For example, when the door is forcibly opened with a screwdriver or the like, the locking part at the tip of the kama lever is caught on the opening edge of the latch insertion opening, for example, so that the door does not open laterally. Since the locking function for the latch insertion opening is possible, it is possible to provide an excellent protection performance.

Further, according to the third aspect of the present invention, the latch is rotated in the unlocking direction by the custom key of the latch lever so that the latch moves backward along the slide guide groove via the slide operation unit connected to the operation shaft. Then, the kama lever swings in the backward direction with the support portion as the rotation axis, and the locking portion of the kama lever is concealed in the up and down direction with respect to the backward moving latch, so that when the coin locker door is unlocked, together with the latch The kama lever can be retracted to the unlocked position without any trouble, and the door can be opened and closed smoothly.

BRIEF DESCRIPTION OF THE DRAWINGS An example of the key system provided with the knurling prevention apparatus of the lock in one form for implementing this invention is shown, (a) is a front view, (b) is a rear view. It is a front view which shows an example of the kama lever which similarly comprises the knurling prevention apparatus of a lock. An example of the latch which similarly comprises the lock opening prevention apparatus is shown, (a) is a front view, (b) is a top view, (c) is a right view. (A) thru | or (e) is explanatory drawing which shows an example of the assembly process of the knurling prevention apparatus of a lock in a key system. It explains the operation of the lock opening prevention device, (a) is a partially cutaway rear view before locking, (b) is a partially cutaway rear view after locking, and (c) is a plan sectional view after locking. is there. FIG. 2 shows a state in which the key system in a locked state is forcibly opened from the outside, (a) is a partially cutaway rear view, and (b) is a plan sectional view.

  An embodiment for carrying out the present invention will be described below with reference to the drawings. Reference numeral 1 shown in the drawing is a system main body of a key system in a coin locker provided with a pry-off preventing device according to the present invention. As shown in FIGS. 1A and 1B, the main body 1 includes a custom key insertion cylinder 2, a master key insertion cylinder 5 having a master cam 4 connected to the slide frame 3, and a coin insertion slot 6. The left side frame 1B separated by the coin mechanical frame 10 to form the front frame 1A, the paid coin passage 8 and the coin detection passage 9 that lead from the coin insertion slot 6, and the left side frame 1B. It is formed on the right side of the front frame 1A with the side frames 11 and faces the handle side of the coin locker door. It is constituted of a right side frame 1C fixed to Kka opening edge.

  The peg opening prevention device according to the present invention is not affected at all by the configuration of the key system in the coin locker, and may be adopted for various other key system configurations.

  On the upper surface of the coin mechanical frame 10, a passage switching lever 12 that can be swung by both side support portions is inclined, and protrusions that respectively project from both ends of the passage switching lever 12 are paid coin passages. 8 and the coin detection passage 9 are respectively inserted into the pay coin passage 8 and the coin detection passage 9 through holes formed in the coin mechanical frame 10 so as to correspond to the coin detection passage 9. Then, by pulling the custom key Q out of the custom key insertion cylinder 2 in the locked state, the engagement / disengagement pin 13 is retracted, and the number changeover plate 15 is rotated by the spring of its own spring via the engagement / disengagement plate 14. It opens from the coin mechanical frame 10 and the tip of the coin stop screw is removed from the hole so that the coins in the pay coin passage 8 and the coin detection passage 9 are dropped into a collection box (not shown) on the lower side. .

  The latch lever 16 of the custom key insertion cylinder 2 is disengaged from the latch lever 16 in a state where the door checker plate 17 (projecting on the surface of the front frame 1A) when the door is closed is pushed. The custom key Q inserted into the insertion cylinder 2 can be rotated in either the locking direction in which the latch 31 protrudes or the unlocking direction in which the latch 31 retracts.

  The tip of the latch lever 16 is provided with a coin checker 18 that is urged to rotate in one rotation direction. The tip side of the coin checker 18 extends from the coin detection passage 9 when a coin is stopped in the coin detection passage 9. When the coin lever is retracted and allowed to rotate in the locking direction by the custom key Q of the latch lever 16 and no coin is stopped in the coin detection passage 9, the coin checker 18 is engaged to lock the latch lever 16 by the custom key Q. It is intended to prevent rotation.

  The apparatus for preventing prying according to the present invention includes two thin and thick plates, a kama lever 21 bent into a substantially L shape or a substantially U shape, and a latch 31 having a substantially rectangular flat plate shape having a locking projection. It is comprised by the superposition | polymerization arrangement | positioning of a member. At this time, as shown in FIGS. 5 and 6, the two-ply pry-off preventing device by the kama lever 21 and the latch 31 is formed on the side surface of the L-shaped folded portion at the opening side edge of the door. It corresponds to the position of P.

  That is, as shown in FIG. 2, the kama lever 21 has a wide lateral arm 23 provided with a substantially triangular mountain-shaped or wedge-shaped locking portion 22 at the end, and a circular groove-shaped support at the end. A vertical arm 26 having a locking recess 25 on the outside and extending substantially in a bifurcated manner via a central bent portion 27, on the outer side of the bent portion 27 and slightly on the side of the lateral arm 23. In addition, a slide operation portion 28 having a substantially vertical arc hole shape with a cut-out corner is formed, and a slide guide groove 29 having a substantially horizontal arc groove shape is formed inside the bent portion 27.

  As shown in FIGS. 3 (a) to 3 (c), the latch 31 has, on one end edge side (tip), for example, locking projections 32 of three circular bosses arranged at equal intervals in the vertical direction. A slide operation portion having a substantially L-shaped opening in which a horizontally long slide guide groove 33 is bored inwardly on the upper side of the other end (rear end) and a corner is notched on the lower side of the other end (rear end). 34 is drilled.

  In addition, the latching protrusion 32 of the latch 31 is not limited to the boss shape as illustrated, and may be a linear protrusion. Further, the slide operation part 34 of the latch 31 is not limited to a substantially L-shaped opening shape, but may be a slide operation part 34 having an arc opening shape or a linear opening shape.

  On the back surface of the front frame 1A, an upper first support shaft 41 and a lower second support shaft 42 are provided. A locking shaft 43 is formed on the slide frame 3, and an operation shaft 44 is provided at one end of the latch lever 16. Is pivotally attached. Of these, the first support shaft 41 is engaged with a circular groove-like support portion 24 at the end of the vertical arm 26 of the kama lever 21 so as to be swingable in the left-right direction. Further, the locking shaft 43 of the slide frame 3 is locked to the locking recess 25 in the vertical arm 26 of the kama lever 21 moved backward. The first support shaft 41 and the locking shaft 43 have a string-like lock replacement frame spring 51 suspended thereon.

  The second support shaft 42 is slidably engaged with the slide guide groove 33 of the latch 31, and the slide operation portion 34 of the latch 31 is mounted on the operation shaft 44 of the latch lever 16 together with the slide operation portion 28 of the kama lever 21. Further, a chord wound return regulating spring 52 is suspended between the second support shaft 42 and the operation shaft 44.

  Next, a description will be given of a procedure for assembling the prying device for preventing the opening according to the present invention to the system main body 1 of the key system in the coin locker configured as described above, and an example of the operation, as shown in FIG. First, the support portion 24 of the kama lever 21 is fitted into the upper first support shaft 41, and the locking recess 25 provided in the vertical arm 26 of the kama lever 21 moved backward is locked to the locking shaft 43 of the slide frame 3. Keep it. At this time, the locking portion 22 at the upper end of the lateral arm 23 is retracted inward from the left side frame 1B of the system main body 1.

  As shown in FIG. 4B, a lock exchange frame spring 51 is suspended between the first support shaft 41 and the locking shaft 43. Thereby, the kama lever 21 itself is always urged to move in the backward direction.

  As shown in FIG. 4C, the latch 31 is inserted into the system main body 1 from the left side frame 1 </ b> B, and the second support shaft 42 is slidably engaged with the slide guide groove 33 of the latch 31. At this time, the latch 31 is retracted from the left side frame 1 </ b> B to the inner back side, and the slide operation unit 34 is inserted to a position that matches the slide operation unit 28 of the kama lever 21. Further, only the portion where the latching protrusion 32 at the tip of the latch 31 is located is slightly exposed outside the left side frame 1B.

  As shown in FIG. 4 (d), the slide operation portion 34 of the latch 31 is mounted on the operation shaft 44 of the latch lever 16 together with the slide operation portion 28 of the kama lever 21, and further, the second support shaft 42 and the operation shaft 44 are connected. A return regulating spring 52 is suspended between them.

  As a result, as shown in FIG. 5A, the latch 31 is rotated by the custom key Q in the unlocking direction via the slide operation portion 34 of the latch 31 and the slide operation portion 28 of the kama lever 21. The kama lever 21 moves backward along the slide guide grooves 33 and 29. At this time, the locking portion 22 of the kama lever 21 is concealed vertically and inwardly with respect to the latch 31 that moves backward. After this movement, the operation shaft 44 of the latch lever 16 is moved and locked to the upper end side of the L-shaped opening of the slide operation portion 34 (see FIG. 4D).

  On the other hand, as shown in FIGS. 4 (e), 5 (b), and 5 (c), when the latch lever 16 is rotated in the locking direction by the custom key Q, the slide operation portion 34 of the latch 31 and the cam lever 21 are The latch 31 moves forward along the slide guide groove 33 via the slide operation unit 28. In conjunction with this, the cam lever 21 swings in the forward direction about the support portion 24 as a rotation axis, so that the locking portion 22 on the upper end side of the lateral arm 23 is exposed upward on the front end side of the latch 31. At this time, the operation shaft 44 of the latch lever 16 is moved and locked to the lower end side of the L-shaped opening of the slide operation portion 34.

  As shown in FIGS. 6 (a) and 6 (b), when the door after the lock of the coin locker is forcibly opened with, for example, a driver D or the like, the latching protrusion 32 at the tip of the latch 31 has an opening side edge of the door. Since the hook is hooked on the rear opening edge of the latch insertion opening P formed at the end, and at the same time, the locking portion 22 at the tip of the kama lever 21 is hooked on the upper opening edge of the latch insertion opening P. It will not open in the direction. That is, a double lock function for the latch insertion opening P for preventing the opening of the pry is possible.

  Note that the locking portion 22 at the tip of the kama lever 21 may protrude downward so as to be caught by the lower opening edge of the latch insertion opening P.

D Driver P Latch insertion opening Q Custom key 1 System main body 1A Front frame 1B Left side frame 1C Right side frame 2 Custom key insertion cylinder 3 Slide frame 4 Master cam 5 Master key insertion cylinder 6 Coin slot 8 Pay coin path 9 Coin Detection path 10 Coin mechanical frame 11 Side frame 12 Path switching lever 13 Engagement / removal pin 14 Engagement / removal plate 15 Number switching plate 16 Latch lever 17 Door checker plate 18 Coin checker 21 Kama lever 22 Locking part 23 Side arm 24 Supporting part 25 Locking Recess 26 Vertical arm 27 Bending part 28 Slide operation part 29 Slide guide groove 31 Latch 32 Locking protrusion 33 Slide guide groove 34 Slide operation part 41 First support shaft 42 Second support shaft 43 Locking shaft 44 Operation Shaft 51 Spring 52 for lock replacement frame Return regulating spring

Claims (3)

In the lock-opening prevention device that prevents the door after locking from being forced open,
A cam lever that includes a locking portion at one end so as to be hooked to the upper and lower opening edges of the latch insertion opening on the door side, and is swingable in the forward and backward direction by a support portion provided at the other end;
It has a latching projection at the tip so that it can be hooked on the rear opening edge of the latch insertion opening on the door side, and has a latch that can slide in the forward and backward direction along the slide guide groove provided at the other end,
Both the latch and the kama lever have a slide operation portion that is linked and interlocked by an operation shaft of a latch lever that can rotate in a locking / unlocking direction,
When the latch lever rotates in the locking direction with the custom key, the cam lever moves the support portion in conjunction with the latch moving forward along the slide guide groove via the slide operation portion of the latch and the slide operation portion of the cam lever. By swinging in the forward direction as the rotation axis,
The latch protrusion at the tip of the latch is caught by the rear opening edge of the latch insertion opening of the door, and the latching portion at the tip of the cam lever is caught by the upper and lower opening edges of the latch insertion opening, so that the door does not open laterally. An apparatus for preventing the opening of a lock, which is characterized by becoming a thing . When the latch lever rotates in the locking direction with the custom key, the kama lever uses the support part as the rotation axis in conjunction with the latch moving forward along the slide guide groove via the slide operation part linked to the operation shaft. 2. A device for preventing a lock from being lifted according to claim 1, wherein the lock lever is formed so as to swing in the forward direction and to expose the locking portion of the kama lever vertically with respect to the forwardly moved latch . The rotation of the latch lever in the unlocking direction with the custom key causes the kama lever to rotate the support part in conjunction with the backward movement of the latch along the slide guide groove via the slide operation part connected to the operation axis. 2. The device according to claim 1, wherein the locking portion of the kama lever is formed so as to be concealed in a vertical and inward direction with respect to the backward moving latch .

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