JP2003193713A - Lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock device having a high resistance against wrong unlocking operation and an excellent operability. <P>SOLUTION: In this lock device, a door 1 is locked and unlocked by a lock piece 4 fixed to one of the door 1 and a case 2 and allowed to move into and out of a striker hole 3 provided in the other of the door 1 and the case. The lock piece 4 comprises a core material 6 having a lock part 5 lockable to the strike hole 3 and a cover body 8 formed of a resin material with brittleness installed on the core material 6 and forming a flat sliding surface 7 with the striker hole 3. A rupture guide recessed part 9 broken at the contact part thereof with the striker hole 3 when the door 1 is forcibly opened is provided in the cover body 8. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lock device.

[0002]

2. Description of the Related Art FIG. 6 shows a conventional example of a lock device which is fixed to a door 1 of a coin locker and locks and unlocks the door 1. In this conventional example, the locking device has a lock piece 4, and the lock piece 4
Is unlocked by operating the strike key 3 on the locker housing 2 side with the unlock key 13 to move back and forth.

A locking recess 14 capable of locking the strike hole 3 is provided on the front wall of the lock piece 4, and an unauthorized door opening operation is performed by inserting a burl 15 or the like from the edge of the door 1 on the opening / closing side. If there is, the locking concave portion 14 is the strike hole 3
, And the resistance to illicit door opening operation is enhanced.

[0004]

However, in the above-mentioned conventional example, during the operation of the ordinary lock device and the opening / closing operation of the door 1, the corresponding side of the front wall of the lock piece 4 and the strike hole 3 is formed. Since a proper operation clearance is secured between and, smooth operation can be performed, but when the amount of luggage in the locker increases, back pressure (P) is generated in the door 1. Then, the above operation clearance is lost. Due to the lack of the operating clearance, the strike hole 3 falls into the locking recess 14 during the forward / backward movement of the lock piece 4, and there is a problem in that the forward / backward movement becomes impossible.

The present invention has been made to solve the above-mentioned drawbacks, has high resistance to an illegal unlocking operation, and
It is an object of the present invention to provide a lock device having good operability.

[0006]

As shown in FIG. 1 (b), when a bar 15 or the like inserted into a gap between a door 1 and a housing 2 in a locked state tries to pry open the door 1 in the direction of arrow A. The door 1 moves in the arrow C direction while the housing 2 side deforms and moves in the arrow B direction. As a result, the strike hole 3
As shown in FIG. 3 (a), the peripheral edge of the lock piece 4 presses the surface of the lock piece 4 in the knife edge state, and when the surface of the lock piece 4 is lower than the hardness of the peripheral edge of the strike hole 3, it bites into the surface of the lock piece 4. On the other hand, when a back pressure (P) is generated due to excessive accommodation of luggage in the locker, the contact state of the strike hole 3 with the surface of the lock piece 4 is generally such that the peripheral wall surface of the strike hole 3 is the surface of the lock piece 4. Does not come into contact with the surface of the lock piece 4 and bite into the surface of the lock piece 4.

The present invention has been made by paying attention to such a difference in contact state between the lock piece 4 and the lock piece 4, and the above-mentioned object is fixed to one of the door 1 and the housing 2 side. A locking device that locks and unlocks the door 1 by a lock piece 4 that can be moved forward and backward in a strike hole 3 provided on the other side of the housing 2, and the lock piece 4 can be locked in the strike hole 3. It comprises a core material 6 having a portion 5, and a cover body 8 formed of a brittle resin material that is attached to the core material 6 and forms a smooth sliding surface 7 with the strike hole 3. , Strike hole 3 when door 1 is pry open
This is to be achieved by a locking device provided with a breaking guide concave portion 9 that breaks at a contact portion with.

That is, the surface of the lock piece 4, that is,
A smooth sliding surface 7 is formed on the surface with which the strike hole 3 comes into contact when the above-described illicit door opening operation is performed, by the cover body 8 attached to the core material 6, and even when back pressure (P) occurs. The operation of the lock piece 4 is guaranteed.

On the other hand, when an illicit opening operation force is applied to the door 1, the periphery of the strike hole 3 generally formed by a sheet metal or the like bites into the synthetic resin cover body 8 and as a result, the cover body 8 is covered. A tensile force or a crushing force is generated, and the brittle cover body 8 breaks due to stress concentration in the breaking guide concave portion 9. After the breakage, if the illegal door opening operation is further continued, the strike hole 3 is locked to the locking portion 5 of the core material 6 exposed on the surface, and the door opening 1 operation cannot be performed thereafter.

When the cover body 8 receives a force from the strike hole 3 and ruptures on the base end side from the point of action of the force, the cover body 8 moves following the strike hole 3 to move the strike hole 3. Therefore, it is necessary to set the breaking point at least from the contact point with the strike hole 3 to the free end side, and when the core material 6 is deformed in the region from the contact point to the free end. However, since the bending moment does not occur and it is difficult to obtain the stress for breaking, the breaking guide concave portion 9 comes into contact with the strike hole 3 when an unauthorized door opening operation is performed. It is placed near the point.

Further, the material of the cover body 8 is experimentally determined to be bite depending on the contact state with the strike hole 3, or to have a hardness capable of maintaining a smooth surface and an appropriate brittleness. , For example, ABS resin,
Alternatively, a polycarbonate resin can be used.

Further, the smooth sliding surface 7 formed by the cover body 8 is sufficient if the strike hole 3 is allowed to pass while the back pressure (P) is applied to the door 1, for example, an unauthorized opening door. The existence of the auxiliary recess 7a that is locked only in the contact state of the strike hole 3 during operation is not denied. By thus providing the auxiliary recessed portion 7a, the breakage position can be specified with certainty, so that the reliability is improved.

Further, the lock device is fixed to one of the door 1 and the housing 2 side, and the door 1 is unlocked by a strike piece 3 provided on the other side of the door 1 and the housing 2 by means of a lock piece 4 which can be moved forward and backward. A locking device for locking, wherein a locking projection 11 capable of locking in a through hole 10 provided in a lock piece 4 in the strike hole 3.
The filling body 12 can be detachably fitted into the through hole 10 to form the smooth sliding surface 7 for the locking projection 11.

The filling body 12 is removably filled in the through hole 10 when a predetermined pressing force is applied. In the filled state, the sliding contact surface side of the lock piece 4 with the strike hole 3 is made flat and smooth. The moving surface 7 is formed. Strike hole 3 will be generated when tampering operation force using crowbar 15 etc. is applied to door 1.
The locking projection 11 of the pressing member presses the filling body 12
After that, the locking projection 11 is locked to the side wall of the through hole 10 to prohibit relative movement.

DETAILED DESCRIPTION OF THE INVENTION FIG. 1 shows an embodiment of the present invention configured as a lock device for a coin locker. The locking device is
A cylinder lock (not shown) is formed in a casing 16 fixed to the door 1, and the cylinder lock is a genuine unlocking key 13
The operating lever 17 connected to the cylinder lock can be rotated by rotating the operating lever 17. A lock piece 4 is connected to the operation lever 17, and the lock piece 4 advances and retreats from the casing 16 by the rotation of the operation lever 17 to be inserted into and removed from the strike hole 3 on the rocker housing 2 side to lock and unlock the door 1. To do.

The lock piece 4 has an ABS on a core material 6 formed of a metal material such as stainless steel having a locking portion 5 on its surface.
It is formed by mounting a resin cover body 8. As shown in FIG. 2, the locking portion 5 has an inclined surface 5a that gradually becomes thinner from the base end side toward the distal end so that it can be locked in the strike hole 3 irremovably when exposed. It has a vertical surface 5b that rises from the end of the surface 5a, and is formed in a sawtooth shape.

On the other hand, the cover body 8 is formed in a C-shaped cross section by hanging the side walls 8b from both side edges of the surface wall 8a forming the smooth sliding surface 7, and is covered with the core material 6. In order to prevent the cover body 8 from being detached from the core material 6 and floating, the cover body 8 is extended to the base end portion of the core material 6, and the casing 16
Inside, the contact state is maintained by appropriate means.

A break guide recess 9 is provided in the surface wall 8a. The breaking guide recessed portion 9 is provided at a portion with which the strike hole 3 comes into contact when the door 1 is tampered with by an illicit opening operation, and is formed by opening the portion except both side edges. Further, the fracture guide recess 9 is formed on both side walls 8b.
It is also provided at the same position in the longitudinal direction of the cover body 8.

Therefore, in this embodiment, the door 1
3 (a), the peripheral edge of the strike hole 3 bites into the smooth sliding surface 7 in a knife-edge shape and the stress is concentrated in the breaking guide recess 9 to cover it. Body 8 breaks. As shown in FIG. 3B, the cover body 8 is broken to expose the engaging portion 5 of the core member 6, and the peripheral wall of the strike hole 3 which has moved relatively along the inclined surface 5a is shown in FIG. 3C. As shown, the door is locked vertically and thereafter the door opening 1 operation is prohibited. Note that FIG.
In (b) and (c), the arrow D indicates the peripheral wall of the strike hole 3.
Indicate.

On the other hand, even if the back pressure (P) is applied and the peripheral wall of the strike hole 3 contacts the surface wall 8a of the cover body 8,
Since the strike hole 3 can move on the bridge portion 8c left on the side edge, it does not hinder the locking / unlocking operation.

FIG. 4 shows a modification of FIG. In addition, in the present modified example and the following embodiments, the same components as those in the above-described embodiment are denoted by the same reference numerals in the drawings, and description thereof will be omitted.

In this modification, the bridge portion 8c
Is provided with an auxiliary recess 7a. The bridge portion 8c and the auxiliary recess 7a are provided closer to the free end than the contact position with the peripheral wall of the strike hole 3, and the auxiliary recess 7a acts as an excessive resistance element when contacting the peripheral wall of the strike hole 3 due to back pressure (P). The depth and the angles of the entry side and the exit side are set so as not to become. Further, as the cover body 8, one having a hardness slightly higher than that of the above-described embodiment is used.

When an illegal opening operation is applied to the door 1, the knife edge formed by the peripheral wall of the strike hole 3 first moves on the smooth sliding surface 7 and then reaches the auxiliary recess 7a, and then the auxiliary recess 7a. To stop due to resistance from it, and as a result, the diagonal downward component force increases and bites into the auxiliary recess 7a,
After that, it breaks by the same mechanism as that of the above-described embodiment (see FIG. 4B).

According to this modification, the breakage portion of the cover body 8 can be set in advance without being influenced by the position of the strike hole 3 or the like, so that the versatility is improved.

FIG. 5 shows a second embodiment of the present invention.
In this embodiment, the strike hole 3 is provided in the door 1, and the locking projection 4 is provided on the side of the strike hole 3 corresponding to the lock piece 4 on the housing 2 side so as to project toward the opposite side. The core member 6 is provided with a through hole 10 into which the locking protrusion 11 can be locked. The filling body 12 is fitted into the through hole 10, and in this state, the surface of the filling body 12 and the lock piece 4 are located on the same plane, and the smooth sliding surface 7 through which the locking projection 11 can pass is formed. To be done.

The backing pressure (P) is applied to the holding strength of the filling body 12 in the through hole 10, more precisely, the load with which the filling body 12 is detached when the filling body 12 is pressed from the front surface to the back surface side. Depending on the pressing force in the state, it is set so as not to be released.

Therefore, in the state in which the back pressure (P) is applied, the locking protrusion 11 forms the filling body 12 which constitutes the smooth sliding surface 7.
It can pass through the surface, and there is no support for locking and unlocking in that state. On the other hand, when the illicit door opening operation is performed, the pressing force applied to the lock piece 4 by the locking projection 11 is large, so that the sliding motion on the smooth sliding surface 7 of the core material 6 is caused. When reaching the loading portion of the filling body 12, the filling body 12 is pushed out to the plane side. By pushing out the filling body 12, the peripheral wall of the fitting hole is exposed, and as shown in FIG.
1 is locked to the peripheral wall and its movement is restricted thereafter.

[0028]

As is apparent from the above description, according to the present invention, it is possible to improve the resistance to an illegal unlocking operation and also to improve the operability.

[Brief description of drawings]

1A and 1B are views showing the present invention, in which FIG. 1A is a rear view and FIG. 1B is a sectional view showing a state of being attached to a door.

FIG. 2 is a view showing a lock piece, (a) is an exploded perspective view,
(B) is a front view of a cover body.

3A and 3B are diagrams showing the operation of the present invention, in which FIG. 3A is a diagram showing a state in which the peripheral wall of the strike hole is bitten, FIG. 3B is a diagram showing a state in which the cover body is broken, and FIG. It is a figure which shows the state restrained.

4A and 4B are views showing a modified example of FIG. 1, wherein FIG. 4A is a view showing a state at the time of an illegal door opening operation, and FIG. 4B is a view showing a state in which a strike hole peripheral wall is restrained.

5A and 5B are views showing another embodiment of the present invention, in which FIG. 5A is a perspective view, FIG. 5B is a vertical sectional view of a lock piece, and FIG. 5C is a sectional view showing a state in which the peripheral wall of the strike hole is restrained. It is a figure.

6A and 6B are views showing a conventional example, in which FIG. 6A is a sectional view and FIG. 6B is a perspective view of a lock piece.

[Explanation of symbols]

1 door 2 housing 3 strike holes 4 lock pieces 5 Locking part 6 heartwood 7 Smooth sliding surface 8 cover body 9 Break guide recess 10 through holes 11 Locking protrusion 12 Packing body

Claims (2)

[Claims] 1. A locking device which is fixed to one of a door and a housing side and locks and unlocks the door with a lock piece which can be operated to move forward and backward in a strike hole provided on the other side of the door and the housing side. And a cover body formed of a brittle resin material attached to the core material and forming a smooth sliding surface with the strike hole. The locking device is provided with a breaking guide concave portion that breaks at a contact portion with the strike hole when the door is pry open. 2. A locking device which is fixed to one of a door and a housing side and locks and unlocks the door with a lock piece which can be operated to move forward and backward in a strike hole provided in the other of the door and the housing side. A lock projection that can be locked in a through hole provided in the lock piece, and a filling body is detachably fitted in the through hole to form a smooth sliding surface for the lock projection. apparatus.