JP2001248352A - Locking device for slide door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking device for slide door, capable of releasing a lock easily and surely, thereby opening a door smoothly. SOLUTION: This locking device 10 for slide door is formed so that a latch arm 26 may be attached to an arm support shaft 34 mounted on the bottom surface 20A of a housing 20 so as to move in a vertical direction of the door, and be urged by a plate spring 44 in a lock direction. A shaft 56 of a rid 28 is inserted in a hole 58 in the housing 20 so that the rid 28 may be oscillatingly journalled in the direction of the bottom 20A, and a protrusion 64 meeting a cam 54 of the latch arm 26 is formed on the bottom 28A of the rid. When a hand is put on the door for opening it, the rid 28 is pushed, the protrusion 64 presses the cam 54 and releases the lock of the latch arm 26, and a hand is put on the inner wall 20C of the housing 20 at the same time, thereby opening the door.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking device for a sliding door, and more particularly to a locking device for a sliding door used for a storage.

[0002]

2. Description of the Related Art Conventionally, sliding doors used for storages and bookshelves have a latch mechanism at a pulling portion to prevent the storages and books from opening out in the event of an earthquake or the like to prevent the storages or books from popping out. It is known that the door can be provided and locked in a closed state.

For example, a lock device 100 for a sliding door disclosed in Japanese Utility Model Laid-Open Publication No. 58-126363 shown in FIGS. 9 and 10 (A) and (B) is attached to a front surface of a door (sliding door) 120 and has a vertical position. It is composed of a pull plate 102 provided so as to be able to swing about a shaft, and a latch member 106 having an engagement recess 104 at the tip.

[0004] A latch member 106 is connected to a casing 110 via a shaft 108 so as to be displaceable between a locked position and a released position.
To be freely rotatable, and a spring 112
When the pull plate 102 is pushed in the door opening direction, the pull plate 10
The latch member 106 is configured to move to the release position in conjunction with the swing of the second (the position indicated by the two-dot chain line in FIG. 10A).

[0005]

However, in the above-described lock device 100, the operating direction (direction of arrow B in the figure) of the pull plate 102 does not match the opening direction of the door 120 (direction of arrow A in the figure). That is, the pull plate 102 swings due to the unlocking operation, and the plate surface is inclined with respect to the door opening direction (the position indicated by the two-dot chain line in FIG. 10B). is there.

For this reason, when opening a door having a large frictional resistance at the time of opening and closing, the door 120 is slightly opened to a position where it is not re-locked while pushing the pull plate 102 to release the lock, and then the handle body 114 is easily held. In some cases, it is easier to put the force back on the hand, and the operation from unlocking the door to opening the door is not continuous, which is complicated.

On the other hand, when a roller or the like is attached to the lower surface of the door to reduce the opening / closing force, the pull plate 102
To open the door by pressing
The frictional resistance of the latch member 106 (engagement concave portion 104) which is disengaged from the latch plate 106 increases, and the operation of the pull plate 102 becomes heavy, or the lock is hard to be released.

On the other hand, dust and dirt tend to accumulate on the concave handle body 114, which may cause malfunction.

When the door 120 is closed and locked, the puller plate 102 holds the inclined guide surface 1 of the latch member 106.
During the time from when the abutment of the bar 18 to the bar 116
It is possible to swing freely, and there is a possibility of rattling within the swing range. As a result, the spring 112
The latch member 106 urged by the pull plate 1
Since the pull plate 102 pressed by the latch member 106 comes into contact with the casing 110 at the time of 02, there is also a problem that noise and vibration increase.

The present invention has been made in consideration of the above facts, and has as its object to easily and surely release the lock of the sliding door, smoothly open the door, and to suppress the occurrence of operation failure due to dust and dirt. Another object of the present invention is to provide a lock device for a sliding door, which has a second object to reduce noise and vibration at the time of locking.

[0011]

According to a first aspect of the present invention, there is provided a housing having a concave shape attached to a pulling portion of a sliding door, and provided in the housing, wherein the sliding door rotates vertically. A lock member that is locked by a lock portion provided in the door stop portion, a first biasing unit that biases the lock member in a locking direction with the lock portion, and a housing that is arranged to cover the housing; A lid member movable between the lid member and the lock member, and an operation of converting the movement of the lid member toward the bottom surface into a rotation operation of the lock member in the unlock direction. And conversion means.

According to the first aspect of the present invention, the lock member that locks to the lock portion provided on the door stop portion is rotatable in the vertical direction of the slide door on the housing attached to the pull portion of the slide door. It is provided and is urged by the first urging means in the locking direction with the locking portion to be locked.

When the user puts his hand on the housing to open the slide door, the cover member arranged to cover the housing is pushed and moves toward the bottom of the housing.
The movement of the lid member in the direction of the bottom surface is converted by the operation conversion means provided between the lid member and the lock member into a rotation operation of the lock member, whereby the lock of the slide door is released. At the same time, the inner wall surface on the front surface side of the housing is exposed by moving the lid member to the concave bottom surface side of the housing, and the user can directly hold the housing to open the slide door.

As described above, when the slide door is opened, the user does not need to pay special attention to the operation for releasing the lock.
The lid member is pushed simply by putting a hand on the housing, and the lock is released.

[0015] Further, by configuring the lid member to move toward the bottom surface of the housing, while the lock is released,
That is, while the lid member is being pushed to put a hand on the housing, no external force in the sliding direction acts on the sliding door. For this reason, the rotation of the lock member that unlocks from the lock portion is not hindered by the load, and problems such as a large resistance of the operation of the lid member and the lock not being released are eliminated.

Thus, the lock of the slide door can be easily and reliably released, and the door can be opened smoothly.

Further, by disposing the lid member on the front surface of the housing to cover the housing, dust and dirt are less likely to accumulate in the housing, thereby preventing malfunctions caused by entering the inside of the apparatus. Furthermore, if the lid member is arranged flush with the front surface of the housing, the appearance of the housing is improved by eliminating unevenness on the front surface of the housing, which is preferable.

According to a second aspect of the present invention, in the sliding door lock device according to the first aspect, the operation converting means is a cam means.

According to the second aspect of the present invention, since the operation converting means is a cam means, the means for converting the movement of the lid member to the rotation of the lock member can be realized with a simple configuration.

According to a third aspect of the present invention, in the slide door lock device according to the first or second aspect, a second urging means for urging the lid member toward the front side of the housing is provided. It is characterized by being.

According to the third aspect of the present invention, since the lid member formed separately from the lock member is urged toward the front side of the housing by the second urging means, the lock member rotates by the locking operation. Even so, the lid member is held at the front position of the housing and does not rattle. Therefore, the shock at the time of locking is reduced, and noise and vibration are reduced.

Also, the resilience of the lid member which has been pushed and moved toward the bottom of the housing can be improved.

According to a fourth aspect of the present invention, in the slide door lock device according to any one of the first to third aspects, the lid member is pivotally supported by the housing in a swingable manner. It is characterized by:

According to the fourth aspect of the present invention, the lid member is pivotally supported by the housing so as to be swingable, and can be moved in the direction of the bottom surface of the housing. Thereby, the mounting structure of the lid member can be simplified.

According to a fifth aspect of the present invention, in the lock device for a slide door according to any one of the first to fourth aspects, the lid member has a notch at a side end in the lock portion direction. Is provided.

According to the fifth aspect of the present invention, the inner wall surface of the housing in the door closing direction is provided by providing a notch in the locking portion, that is, the side end in the closing direction of the sliding door, of both end portions of the lid member. Is always exposed.
Thus, when closing the slide door, the housing can be easily held without pushing the lid member.

According to a sixth aspect of the present invention, in the lock device for a slide door according to any one of the first to fifth aspects, the lock member is formed of a synthetic resin, and the first urging member is provided. The means is an elastic member provided integrally with the lock member.

In the invention according to claim 6, the first urging means for urging the lock member is an elastic member provided integrally with the lock member made of synthetic resin, so that the elastic member is provided. The lock member can be easily manufactured by molding. Further, the elastic member is attached together by attaching the lock member to the housing, so that the assembly is simplified.

[0029]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a steel cabinet 12 to which a sliding door lock device 10 (hereinafter simply referred to as a lock device 10) according to an embodiment of the present invention is applied.

The lock device 10 includes left and right sliding doors 1 provided on a cabinet 12 so as to open and close in a sliding manner.
It is used by being attached to each of the pullers 4 and 16 as shown. Here, each part of the lock device 10 is configured to be symmetrical in the left and right directions so as to be selectively used for left and right doors.
The lock device 10 will be described in detail using the left slide door 14 shown in FIG.

As shown in FIGS. 2 and 3, the locking device 10 has a concave housing 20 which is mounted in a rectangular device mounting hole 15 formed in a pull portion of the sliding door 14, and
A latch arm 26 attached to the bottom surface 20A of the housing 20 and rotatable in the vertical direction of the slide door 14 (in the direction of arrow C in the figure) and lockable on a latch receiver 24 provided on the door stop 22 of the cabinet 12; A lid 28 is disposed flush with the front surface 20B of the housing 20, and is pivotally supported so as to swing toward the housing bottom surface 20A.

These housing 20, latch arm 2
6 and the lid 28 are molded products made of synthetic resin (POM), and have a structure that can be bent and deformed by elastic force.

The housing 20 has a projecting portion 30 on the front side peripheral edge of the concave body and two claws 3 from the left outer edge thereof.
1 is projected, a hook 31 is hooked on a notch 15A formed in the device mounting hole 15, and a tapered hooking portion 32 provided on the right outer surface of the main body is pushed into the device mounting hole 15 to slide the sliding door. 14. In the mounted state, the outer periphery of the main body of the housing 20 is in the device mounting hole 15
, And the protrusion 30, the claws 31 and the hooks 32 sandwich the slide door 14, thereby suppressing the occurrence of play.

As shown in FIG. 3, the housing bottom surface 20A
An arm support shaft 34 for attaching the latch arm 26 protrudes substantially at the center.

The arm support shaft 34 has a distal end portion divided into two forks, and a tapered flange portion 36 is formed on each of the fork portions. The distal end portion of the fork portion is elastically deformed inward, so that the latch The hole 38 of the arm 26 can be inserted. The diameter of the shaft portion is slightly smaller than the inner diameter of the hole 38.

When the latch arm 26 is inserted (see FIG. 4), the tip of the shaft expands to its original state, and the latch arm 26 is held by the flange 36. The latch arm 26 is rotatably supported by an arm support shaft 34.

Further, on the bottom surface 20A of the housing,
Substantially L-shaped ribs 40A and 40B are formed facing each other with a horizontal line H extending along the bottom surface 20A about the arm support shaft 34, and stopper pins 42A and 42B are protruded at vertically symmetric positions. ing.

In the concave portion of the rib 40A located below the horizontal line H, a distal end portion of a leaf spring 44 which is bent downward in a substantially rectangular shape from the rear end portion of the latch arm 26 and extends. Abuts (see FIG. 5) to urge the latch arm 26 in the locking direction (counterclockwise rotation), and the urged latch arm 26 is located closer to the arm tip than the arm support shaft 34. The stopper pin 42A is kept substantially horizontal by contacting the stopper pin 42A.

On the other hand, on the back surface of the latch arm 26, a groove 46 wider than the pin diameter is formed at a position corresponding to the stopper pin 42B located at the upper part of the arm. The rotation range of the lock 26 in the unlocking direction (clockwise rotation) is as follows.
It is regulated by contacting the pin 42B (see FIG. 6).

When the lock device 10 is used for the right slide door 16, the upper rib 40 B, which is not used here, is moved up and down by the housing 20 being mounted upside down. , Which support a leaf spring of a latch arm (not shown) dedicated to the right door. At this time, the stopper pins 42A and 42B are also turned upside down, and the functions are reversed.

The latch arm 26 urged in the locking direction as described above allows the brace 48 (downward) at the tip end thereof to pass through the rectangular opening 50 formed in the left side surface portion of the main body of the housing 20, and It is configured to protrude from the notch 52 on the side end surface and engage with the latch receiver 24. Further, a cam portion 54 is formed at the rear end of the arm with which a protrusion of the lid 28 described below slides.

Here, the lid 28 will be described first. The lid 28 is a flat plate, and the outer shape is a rectangle slightly smaller than the opening of the main body of the housing 20.
8A is provided with two shaft portions 56 whose axes are aligned and directed in the up and down directions.

The shaft portion 56 is disposed slightly inward from the upper and lower end surfaces of the lid 28, and is inserted into holes 58 formed at the upper and lower portions of the housing inner wall surface 20C by bending the entire lid 28. It has become so. The inside diameter of the hole 58 is slightly larger than the shaft diameter of the shaft portion 56, so that the lid 28 can swing toward the bottom surface 20 </ b> A and the front surface 20 </ b> B of the housing 20.

A spring (helical spring) 60 is inserted into the upper shaft portion 56 to urge the lid 28 toward the housing front surface 20B. In this biased state, one side end surface 28C of the lid 28 (the side on which the shaft portion 56 is provided) abuts on the inner wall surface 20C of the housing 20 (the opening 50 side) to regulate the swing range, and the lid surface 28B It is configured to be aligned with the front surface 20B.

Further, a notch 62 is formed in the lid 28 by partially removing the edge of the side end surface 28C side.
Thus, even when the lid 28 is in the biased state, the inner wall surface 20C of the housing 20 in the door closing direction is partially exposed.

As described above, the projection 64 is formed on the rear surface 28A of the lid 28 at a position corresponding to the cam 54 of the latch arm 26. Protrusion 64
The front end of the cam portion 54 that comes into contact with the cam surface is chamfered so as to make surface contact (sliding contact).
8 is urged toward the front surface 20B of the housing, and has a length reaching the cam surface when the latch arm 26 is urged in the locking direction.

The cam portion 54 has a cam surface inclined upward from the front to the back, and moves downward when the lid 28 swings and is pushed by the projection 64. ing. As a result, the latch arm 26 rotates clockwise, and the latch 4 engaged with the latch receiver 24 is rotated.
8 comes off and the lock of the slide door 14 is released.

The housing 20 of the present embodiment is also provided with a name plate mounting portion 66 (recess) on the right side of the main body opening where the lid 28 is mounted.

Next, the operation of the present embodiment will be described.

In order to open the locked slide door 14 in contact with the door stop 22 of the cabinet 12, FIG.
As shown in FIG. 7, the lid 28 of the lock device 10 is pushed in against the urging force of the spring 60. Then lid 28
Swings in the direction of the housing bottom surface 20A, and the lid back surface 28
The protrusion 64 of A presses the cam 54, and the latch arm 26 rotates from the locked position of FIG. 5 as shown in FIG. 6, and the lock of the slide door 14 is released. At the same time, the inner wall surface 20C of the housing 20 in the door opening direction is exposed, and the sliding door 14 is opened by holding a hand on the exposed portion.

To close the slide door 14, FIG.
As shown in FIG. 6, the door can be moved in the closing direction by pushing the housing inner wall surface 20C exposed by the notch 62 without pushing the lid 28 toward the housing bottom surface 20A.

As described above, in the sliding door lock device 10 according to the present embodiment, when the sliding door 14 is opened, the user only needs to put his hand on the housing 20 without being conscious of the operation for releasing the lock. , The lid 28 is pushed and the lock can be released. Further, since the lid 28 swings in the direction of the housing bottom surface 20A, the slide door 14 does not move in the sliding direction during the lock release,
Latch 4 of latch arm 26 coming off from latch receiver 24
No extra frictional resistance is generated between the latch 8 and the latch receiver 24. Therefore, problems such as the operation of the lid 28 becoming heavy and the lock not being released are eliminated.

Therefore, the unlocking of the slide door 14 can be easily and reliably performed, and the door can be smoothly opened.

Further, in the case of a structure in which the latch is moved in the thickness direction of the door to lock and unlock, the operation space of the latch needs to be secured, so that the thickness of the lock device and the door increases, and a wasteful space is generated. However, in the present embodiment, since the latch arm 26 rotates in the vertical direction of the slide door 14, there is no waste in space in the thickness direction.

Further, since the lid 28 is disposed on the front side of the housing 20 and covers the inside of the housing, it is possible to prevent malfunctions caused by dust and dirt entering the inside of the apparatus. Further, here, the lid surface 28
Since B is aligned with the front surface 20B of the housing, there is no unevenness, and the surface becomes a flat surface and the appearance is good.

The lid 28 formed separately from the latch arm 26 normally comes into contact with the cam portion 54 of the latch arm 26 whose projection 64 on the back surface 28A is urged in the locking direction by the leaf spring 44. As a result, the housing is held at the front position of the housing.

However, in this embodiment, since the spring 60 further urges the front side of the housing,
In the locking operation, only the latch arm 26 rotates and locks to the latch receiver 24, and the lid 28 is held at the front position of the housing without rattling. Therefore, a conventional structure in which the lid is not biased, for example,
Rather than a structure where the latch arm and lid are integrated,
Shock during locking is reduced, and noise and vibration are reduced.

Further, since the lid 28 is pivotally supported on the housing 20 so as to be able to move toward the bottom of the housing, the mounting structure of the lid 28 is simple.

Here, in the lid 28 having a relatively large vertical (door vertical) dimension as in this embodiment, the upper and lower shaft portions supporting the projection 64 (and the cam portion 54) and the lid 28 are provided. The distance to 56 is increased. For this reason, the means for returning the lid 28 that has swung toward the bottom surface of the housing to the front side only requires the shaft portion 56 to be pushed back by the cam portion 54 that is moved by the urging force of the leaf spring 44 as described above. The frictional resistance between the housing 28 and the hole 58 of the housing 20 may increase, and the return of the lid 28 may be deteriorated.

However, as described above, in the present embodiment, since the springs 60 for urging the lid 28 to the front side are individually provided, the returnability is good.

Further, the notch 62 is provided at the side end of the lid 28 in the lock direction, that is, in the direction in which the slide door 14 is closed.
The slide door 14 can be easily closed by holding the housing 20 without pressing.

Further, since the latch arm 26 is made of synthetic resin and the plate spring 44 for urging in the locking direction is integrally provided, the latch arm 26 having the plate spring 44 can be easily formed by molding. Manufacturable and easy to assemble into equipment.

In this embodiment, the latch arm 26 is attached to the bottom surface 20A of the housing 20. However, the latch arm 26 can be provided at another location. And the housing bottom 2
Although it is moved in the 0A direction, it may be structured to slide in parallel. Further, the arrangement of the cam portion 54 and the projecting portion 64 that converts the movement of the lid 28 to the rotation of the latch arm 26 can be reversed.

Further, from the movement of the lid 28, the latch
The means for obtaining the turning operation of the arm 26 can be adopted other than the cam means comprising the cam portion 54 and the projection 64 as in the present embodiment, for example, a mechanism comprising a rack and a pinion gear. Means can be applied.

Further, the leaf spring 44 for urging the latch arm 26 in the locking direction is not an integral structure as in this embodiment, but may be a metal leaf spring, a compression coil spring or the like as a separate body. .

Further, the present invention can be applied not only to the cabinet 12 as in the present embodiment but also to various kinds of furniture provided with a door which can be opened and closed in a sliding manner, and further can be used for buildings and the like.

[0068]

As described above, the sliding door lock device of the present invention has the above-described structure.
The door can be opened securely and the door can be opened smoothly, and malfunctions due to dust and dirt are suppressed, and secondly, noise and vibration at the time of locking can be reduced.

[Brief description of the drawings]

FIG. 1 is an external view of a cabinet to which a lock device for a sliding door according to an embodiment of the present invention is applied.

FIG. 2 is a perspective view illustrating a slide door locking device according to an embodiment of the present invention.

FIG. 3 is an exploded perspective view showing the lock device of the slide door of FIG. 2;

FIG. 4 is an enlarged perspective view for explaining a mounting structure of the latch arm of FIG. 3;

5A and 5B are views for explaining the operation of the sliding door lock device of FIG. 2, wherein FIG. 5A is a schematic cross-sectional view of the locked state as viewed from the front, and FIG. It is sectional drawing.

6A and 6B are diagrams for explaining the operation of the sliding door lock device of FIG. 2, wherein FIG. 6A is a schematic cross-sectional view of the unlocked state viewed from the front, and FIG. 6B is a line BB of FIG. FIG.

FIG. 7 is a diagram illustrating an operation for opening a slide door to which the slide door locking device of FIG. 2 is applied.

8 is a diagram illustrating an operation when closing the slide door to which the lock device of the slide door of FIG. 2 is applied.

FIG. 9 is a perspective view showing a state in which a conventional slide door lock device is attached to a slide door.

10A and 10B are diagrams illustrating a locking and unlocking operation of the locking device of the sliding door in FIG. 9, wherein FIG. 10A is a schematic cross-sectional view as viewed from the front, and FIG. 10B is a BB line of FIG. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Locking device of sliding door 12 Cabinet 14, 16 Sliding door 20 Housing 20A Bottom surface 20B Front surface 22 Door contact 24 Latch receiver (Lock part) 26 Latch arm (Lock member) 28 Lid (Lid member) 44 Leaf spring (First spring) Urging means / elastic member) 54 cam (cam means) 60 spring (second urging means) 62 notch 64 protrusion (cam means)

Continued on the front page (72) Inventor Koichi Niizuma 184-1, Maioka-cho, Totsuka-ku, Yokohama-shi, Kanagawa-ken Nifco Co., Ltd.

Claims (6)

[Claims] A recessed housing attached to a pulling portion of the sliding door; and a housing provided in the housing, which is turned in a vertical direction of the sliding door and locked by a locking portion provided in a door stop. A lock member, first urging means for urging the lock member in a locking direction with the lock portion, a lid member arranged to cover the housing and movable in a bottom direction of the housing, and the lid A sliding door, provided between the member and the lock member, for converting a movement of the lid member in the bottom direction to a rotation of the lock member in the unlocking direction. Locking device. 2. The slide door lock device according to claim 1, wherein said motion conversion means is a cam means. 3. The sliding door lock device according to claim 1, further comprising a second urging means for urging the lid member toward a front side of the housing. 4. The housing according to claim 1, wherein said lid member is pivotally supported by said housing.
The lock device for a slide door according to any one of the above. 5. A notch is provided at a side end of the lid member in a direction of the lock portion.
The locking device for a slide door according to claim 4. 6. The lock member is formed of a synthetic resin,
The lock device for a slide door according to any one of claims 1 to 5, wherein the first urging means is an elastic member provided integrally with the lock member.