JP3553790B2 - Door lock device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a door lock device for locking a door such as a coin locker, in which a tool is inserted into a gap between the door and a frame side to enlarge the gap and prevent theft of opening the door.
[0002]
[Prior art]
FIG. 9 is a front view of a door lock device of a coin locker. A strike (not shown) is provided at an end of the door D, and a locking / unlocking device A that disengages with the strike is provided on a frame side facing the end of the door D. Is attached.
A coin insertion slot 1, a coin withdrawal slot 2, and a cylinder lock 3 are provided on the surface of the locking and unlocking device A, and a handle 4 is provided on the surface of the door D.
[0003]
As shown in FIG. 10, the locker not used by the user can be opened because the tongue 5 is immersed from the side of the locking and unlocking device A and is not engaged with the strike (not shown) of the door D. However, when the locker user opens the door, stores the luggage in the locker, and enters a fee, the key inserted into the key hole 6 (see FIG. 9) of the cylinder lock 3 becomes rotatable.
[0004]
A lower end of a tongue lock lever 10 is pivotally attached to a support shaft 9 in a case 8 of the locking / unlocking device A, and a shaft 11 provided at an upper end of the tongue lock lever 10 is vertically elongated provided at an upper end of the shift plate 7. Since the tongue lock lever 10 is engaged with the hole 12 and is engaged with the hole of the tongue 5, the clockwise rotation of the shift plate 7 causes the tongue lock lever 10 to rotate largely clockwise, and the tang 5 Project from the case 8 of the locking and unlocking device A (see FIG. 11) and engage with the strike of the door D, so that the door D is locked. When rotating the key in the unlocking direction (counterclockwise direction in FIG. 11), the tongue 5 of the shift plate 7 which engages the rotor of the cylinder lock 3 is a rotor integrally rotated in the same direction, it was projected Is immersed in the case 8, the door D is unlocked, and the door can be opened.
[0005]
[Problems to be solved by the invention]
However, if a tool such as a bur is inserted into the gap C between the door D and the locking / unlocking device A to enlarge the gap C, the door D or the locking / unlocking device A that has received the large destructive force expanded by the lever can be easily formed. When the gap C is larger than the engagement length of the tongue 5, the tongue 5 separates from the strike of the door D and is opened.
Until now, there has been no appropriate preventive measure against such malicious theft accidents caused by opening the door.
An object of the present invention is to provide a door lock device in which, when a prying force is applied to the door D, a locking force opposing the prying force is automatically generated.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides
The strike is provided at an end portion of the door, the rail side in Tobirajo device provided with a locking and unlocking device having a tongue which engages and disengagement with the strike by locking operation and unlocking operation of the front lock and tablets, with the tongue An engaged portion is provided, and the strike is slidable along the inner wall surface of the box-shaped portion of the cover and is biased in a direction protruding from the strike, and is detachable from the engaged portion. A hook plate pivotally attached to the strike so as to be tiltable, a guide pin is provided on the trigger, and the guide pin is loosely fitted to the hook, and the trigger protrudes by a predetermined amount or more. At this time, a cam groove for guiding the hook plate in a direction in which the hook engages with the engaged portion is formed .
[0007]
The engaged portion may be an engaged hole into which the tip of the hook engages. The strike may be provided with a hook insertion hole intersecting the engagement path of the tongue, and the hook insertion hole may be located at a position where the tip of the hook inserted into the engaged portion is engaged.
In this case, the locking force against the prying force is further strengthened.
[0008]
The strike is a box-shaped strike that is fixed to the back side of the door.The front wall on the end face side of the door is provided with a receiving hole into which the protruding tongue engages and a hole for the trigger to protrude and retract. In addition, a structure may be provided in which a spring for urging the trigger in a projecting direction and a support shaft for pivotally attaching the hook plate are provided.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
A specific example of an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a door lock device illustrating a state of being subjected to a prying force, FIG. 2 is a front view of the door lock device with a door D removed, and FIG. FIG. 4 is a front view, FIG. 4 is a view as viewed in the direction of the arrow X in FIG. 3, FIG. 5 is a view as viewed in the direction of the arrow Y in FIG.
[0010]
Tobirajo device is composed of a strike S to be affixed to the back side of the door D, the locking and unlocking device A ₁ stile side by.
Unlocking device A ₁ is that it uses a tongue 15 having an engaged portion 16 is different from the conventional locking and unlocking apparatus A, other configurations are the same as the conventional locking and unlocking apparatus A.
The strike S is combined in a box shape by the strike main body 17 and the cover 18, and is fixed to the back side of the door D by the screw 19 (see FIGS. 1 and 6).
[0011]
As shown in FIG. 6, the strike main body 17 is formed by bending a front wall 17a on the right side, is provided with a receiving hole 20 into which the tongue 15 is engaged, and is connected to the receiving hole 20. 21 are provided.
The strike body 17 is provided with a hook support wall 22 cut and raised on three sides at an end opposite to the front wall 17a, and a support shaft 23 penetrates two opposing hook support walls 22, and the other one is provided. A screw hole 37 is provided in the hook support wall 22.
The strike body 17 is provided with an insertion hole 24 for the screw 19 and a hook insertion hole 25 used in the second embodiment of the present invention (see FIG. 6).
[0012]
A notch 27 that opens toward the strike body 17 is provided at the other end (tip) of the hook plate 26, one end of which is pivotally connected to the support shaft 23. A hook 28 is formed.
A cam groove 29 provided at an intermediate portion of the hook plate 26 communicates with a normal cam groove 29a approaching the strike body 17 and a distal end (an end closer to the hook 28) of the normal cam groove 29a. The anti-theft cam groove 29b is provided at a position away from the strike main body 17 (see FIG. 6).
[0013]
The cover 18 is composed of a strike body 17 and a box-shaped part 18a opening to the front wall 17a, and a flange part 18b extending above and below the box-shaped part 18a, and the flange part 18b is overlapped with the strike body 17. An insertion hole 30 that overlaps with the insertion hole 24 is sometimes provided, and a hole 38 that overlaps the screw hole 37 of the strike main body 17 is provided on the rear end wall of the cover 18, and a screw 39 inserted into the hole 38 has a screw hole 37. (See FIGS. 5 and 6).
[0014]
A trigger 31 slidable along the inner wall surface of the box-shaped portion 18a is provided with two guide slots 32 and 33 and a pin 34 having a small-diameter guide pin 34a at the tip (see FIG. 7).
A spring support pin 35 and a guide pin 36 are erected on the inner wall surface of the box-shaped portion 18a. After the spring support pin 35 is inserted into the guide elongated hole 32, a retaining ring 40 is inserted into an annular groove 35a provided in the spring support pin 35. After fitting and inserting the guide pin 36 into the guide slot 33, the retaining ring 41 is fitted into the annular groove 6a provided in the guide pin 36 (see FIG. 7).
[0015]
Therefore, the trigger 31 slides along the inner wall surface of the box-shaped portion 18a while being guided by the guide pin 36 and the spring support pin 35, and the distal end of the trigger 31 is provided in the trigger projecting / retracting hole 21 (see FIG. See 4).
By extending the spring 42 between the spring support pin 35 and the pin 34 of the trigger 31, the distal end of the trigger 31 is urged in a direction to protrude from the trigger projecting hole 21.
[0016]
The tongue 15 is provided with an engaged portion 16 from which the hook 28 can be disengaged when engaged in the receiving hole 20 of the strike S.
In this embodiment, the engaged portion 16 is formed of two rectangular engaged holes, but may be a cutout portion as long as the hook 28 can be engaged and disengaged.
[0017]
The operation of the first embodiment of the door lock device configured as described above will be described with reference to FIGS. 1, 2, and 8 (A) to 8 (C).
The first embodiment differs from the second embodiment only in that no hook insertion hole 25 is provided in the strike body 17.
We are locking and unlocking device A ₁ unlocked, when the door D is open, projects from the trigger infested hole 21 of the front end portion of the trigger 31 front wall 17a, the tip of the guide pin 34a is a cam groove of the pin 34 of the trigger 31 The guide pin 34a pushes the hook plate 26, and the hook 28 is tilted to a position where the hook 28 approaches the strike main body 17 because the anti-theft cam 29b is located at 29 (see FIG. 8A).
[0018]
When the door D is closed, the tip of the trigger 31 is pushed to the frame side and retreats, and the guide pin 34a moves from the anti-theft cam 29b to the normal cam 29a, so that the guide pin 34a strikes the hook plate 26. Pushing in a direction away from the main body 17 causes the hook plate 26 to tilt to a position where it does not prevent the tongue 15 from entering (see FIG. 8B).
[0019]
When rotating the key K inserted into the key hole of the cylinder lock 3 in the locking direction, the door D is disabled door opening since engaged into the hole 20 receiving the tongue 15 projecting from the locking and unlocking device A _1. In this locked state, the engaged portion 16 of the tongue 15 is at a position where the hook 28 can be engaged.
Since the trigger 31 is at the retracted position, the hook plate 26 is held at a downward tilt position that does not interfere with the locking and unlocking operations of the key K (see FIG. 8C).
[0020]
In this locked state, malicious person insert the tool into the gap between the door D and the locking and unlocking device A _1, and you pry the door D to expand the gap, since the trigger 31 projects in accordance with the enlargement of the gap The guide pin 34a of the trigger 31 moves from the normal cam portion 29a to the antitheft cam portion 29b, the hook plate 26 pushed by the guide pin 34a tilts upward in FIG. 1, and the hook 28 engages with the tongue 15. since engaged into engagement portions 16, the tongue 15 of the hook 28 and the locking and unlocking device a ₁ strike S is engaged integrally engaged, prevents the expansion of the gap (see Figure 1).
[0021]
If prying force is very large, the prying force bending deformation occurs in a hook 28 which receives, since the life of the strike S may become shorter, is a second embodiment of the present invention to prevent this.
The hook 28 of the hook plate 26 is extended, the cam groove 29 is adjusted so that the tongue 15 does not interfere with the hook 28 when closed, and the strike body 17 is provided with a hook insertion hole 25 into which the tip of the hook 28 is engaged. In this case, when a force for opening the door D is applied, the hook 28 engages with the engaged portion 16 of the tongue 15 and the hook insertion hole 25 of the strike body 17, so that the hook insertion hole 25 causes the hook 28 to bend. Block.
Therefore, the door D cannot be opened unjustly unless an extremely large door opening force for shearing the hook 28 is applied.
In the first and second embodiments of the present invention, the door lock device of the coin locker has been described. However, the present invention can be applied to any lock device that locks by projecting a tongue.
[0022]
【The invention's effect】
As described above, the present invention provides the engaged portion on the tongue, and the strike includes a trigger that slides along the inner wall surface of the box-shaped portion of the cover and is urged in a direction protruding from the strike. A hook plate which has a hook which can be disengaged from the engaged portion and which is pivotally attached to the strike so as to be tiltable, a guide pin is provided for the trigger, and the guide pin is loosely fitted to the hook. When the trigger protrudes by a predetermined amount or more, a cam groove is formed so as to guide the hook plate in a direction in which the hook engages with the engaged portion. If you try to open the door by expanding the gap with the delivery, the trigger will protrude in accordance with the expansion of the gap, the guide pin will move, the hook plate will tilt, the hook will engage the engaged part of the tongue, and the strike will occur. By the action of such integral engagement between the tongue of the click and unlocking device, prying door which has been a problem conventionally can be prevented, low cost to provide a highly reliable door lock device Can be.
Since the strike can be stored compactly on the back side of the door, the storage space for luggage does not decrease.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a door lock device illustrating a state opposing a prying force.
FIG. 2 is a front view of the door lock device with the door removed.
FIG. 3 is a front view of the strike box as viewed from the back side of the door.
FIG. 4 is a view as viewed in the direction of the arrow X in FIG. 3;
FIG. 5 is a view as viewed in the direction of the arrow Y in FIG. 3;
FIG. 6 is an exploded perspective view of the strike box.
FIG. 7 is a perspective view of a cover of the strike box.
FIGS. 8A to 8C are cross-sectional views of the door lock device showing an open state, a closed state, and a locked state.
FIG. 9 is a front view of a conventional door lock device.
FIG. 10 is a rear view showing a locked state of the locking / unlocking device used for the door locking device.
FIG. 11 is a rear view showing an unlocked state of the locking / unlocking device used for the door locking device.
[Explanation of symbols]
A ₁ Locking / unlocking device D Door S Strike 15 Tongue 16 Engaged part 17 Strike body 18 Cover 20 Receiving hole 21 Trigger emergence hole 23 Support shaft 25 Hook insertion hole 26 Hook plate 28 Hook 29 Cam groove 29a Normal cam portion 29b Anti-theft cam part 31 Trigger 32, 33 Guide long hole 34 Pin 34a Guide pin 36 Guide pin 42 Spring

Claims (2)

The strike is provided at an end portion of the door, the rail side in Tobirajo device provided with a locking and unlocking device having a tongue which engages and disengagement with the strike by locking operation and unlocking operation of the front lock and tablets,
An engaged portion is provided on the tongue, and the strike includes a trigger that slides along an inner wall surface of the box-shaped portion of the cover and is urged in a direction protruding from the strike. while it has a disengageably hooks provided a hook plate which is tiltably pivoted on the strike, the trigger to the hook is loosely fitted the guide pin is Tokoro with the above trigger provided a guide pin A door lock device , wherein a cam groove is formed to guide the hook plate in a direction in which the hook engages with the engaged portion when the hook projects beyond a predetermined amount. The strike is provided with a hook insertion hole that intersects the engagement path of the tongue, and the hook insertion hole is located at a position where the tip of the hook inserted into the engaged portion is engaged. The door lock device according to claim 1, wherein

Images