JP2002220955A - Locking/unlocking device for sliding door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable temporary holding of the closed state when a sliding door is closed. SOLUTION: In the locking/unlocking device for the sliding door 1 in which a front end part 47 of a slider 37 is retreated in accordance with the closure of the sliding door 5, and a sickle hook 15 protruded by interlocking with the retreating is engaged with a sickle entering hole 25 of a strike plate A, the locking/unlocking device for the sliding door has a latch claw 85 at the circumference and is supported freely rotatably, and further, provided with a latch plate 81 to be rotated while following the advancing/retreating of the slider 37, an unlocking plate 91 energized by a coil 97 for a releasing plate in the vicinal direction to the latch plate 81, and a locking plate 101 which, while regulating the rotation of the latch plate 81 by locking a locking piece 109 to the latch claw 85 of the latch plate 81 supported freely rotatably and rotated while following the retreating of the slider 37, unlocks the locking piece 109 to the latch claw 85 while following the sliding of the unlocking plate 91.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a locking / unlocking device for a sliding door, which automatically locks a door when the sliding door is closed, and more particularly, closes the sliding door regardless of the locked state and the unlocked state. The present invention relates to an improved technique capable of holding a state in which the state is maintained.

[0002]

2. Description of the Related Art For example, in a locking and unlocking device for a sliding door, after closing the sliding door, a hook is protruded from a lock body provided on the sliding door, and the hook is provided in a vertical frame in contact with a vertical frame of the sliding door. In some cases, the sliding door is locked so that it cannot be opened by engaging with a strike plate for a sliding door.

[0003] This type of locking / unlocking device for a sliding door includes a lock body,
A swingable hook is provided, and the hook is projected from the front plate. A thumb turn or the like is interlocked to the hook.

Accordingly, by closing the sliding door and operating the thumb turn or the like of the lock main body, the hook is rotated and protruded from the front plate of the lock main body following the operation. The locking / unlocking device for a sliding door was able to lock the sliding door so that it could not be opened by engaging the hook with the hook entry hole of the strike plate.

[0005]

The above-described conventional locking / unlocking device for a sliding door generally includes a trigger bolt which comes into contact with a strike plate. When the trigger bolt advances and retreats, a locking mode and a non-locking mode are set. Is switched over. That is, the state in which the trigger bolt is retracted into the lock body is set to the lock mode, and the hook is swingable, so that the locking operation can be performed by a thumb turn or the like. On the other hand, the state in which the trigger bolt protrudes from the lock body by a biasing member such as a spring is set to a non-locking mode, and the hook is locked so as not to be able to swing freely, so that a locking operation by a thumb turn or the like becomes impossible.

Accordingly, when the sliding door is simply closed, the hook does not automatically protrude, so that the sliding door can be freely opened and closed. If the sliding door is provided with a structure for lightly sliding so as to be easily opened and closed, for example, a door roller or the like, if the biasing force of the spring for projecting and biasing the above-mentioned trigger bolt abutting on the strike plate is large, this sliding Since the trigger bolt always keeps protruding due to the force, even if the sliding door is closed, there is a problem that the sliding door is pushed back in the direction opposite to the closing direction by the urging force (repulsive force).

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a locking / unlocking device for a sliding door which can be temporarily held in a closed state when the sliding door is closed.

[0008]

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. In the locking / unlocking device 1 for a sliding door according to claim 1 of the present invention, the tip part 47 of the slider 37 protruding from the front plate 31 of the locking body B is brought into contact with the strike plate A together with the closing of the sliding door 5. The locking / unlocking device 1 for a sliding door, wherein the hooks 15 protruded from the front plate 31 in association with the retreat of the slider 37 are engaged with the claw entry holes 25 of the strike plate A, A latch plate 81 having a latch claw 85 on the outer periphery and rotatably supported by the side plate 39 of the lock body B, coupled to the slider 37 and rotated by the advance and retreat of the slider 37; A lock release plate 91 slidably guided by the side plate 39 of the lock body B and urged by a release plate urging member 97 to one end in a slide direction that is a direction approaching the latch plate 81; Stop piece 1 The lock body B has a 9
The latch pawl 8 of the latch plate 81 which is rotatably supported by the side plate 39 and is rotated by the retraction of the slider 37
5, the locking piece 109 is locked to restrict the rotation of the latch plate 81, and the locking piece 1 is rotated by the slide of the locking release plate 91 and is rotated with respect to the latch claw 85.
And a locking plate 101 for releasing the locking of the lock 09.

In the locking / unlocking device 1 for a sliding door, when the sliding door 5 is closed and the distal end portion 47 of the slider 37 comes into contact with the strike plate A and is retracted into the lock body B, the latch plate 81 is opened.
Is rotated, and the latch claw 85 of the latch plate 81 is
Locking to the first locking piece 109 restricts rotation of the latch plate 81. That is, the advance / retreat of the slider 37 is restricted via the latch plate 81 whose rotation is restricted. Thus, the sliding door 5 is not moved in the direction opposite to the closing direction by the biasing force of the slider 37 biased in the forward direction, and the sliding door 5 is temporarily held in the closed state. As a result,
Due to the repulsive force of the slider 37, no gap is formed between the vertical frame 3 and the sliding door 5. In addition, since the movement of the slider 37 is restricted, the rotation of the hook 15 following the slider 37 is also restricted. As a result, the rotation of the hook 15 engaged with the strike plate A is prevented. , A pseudo locked state, that is, a temporary locked state. In order to release the temporary holding state (temporary locking state), the locking plate 101 is operated to release the locking state between the locking piece 109 and the latch claw 85. 5 can be opened.

The sliding door locking / unlocking device 1 according to a second aspect of the present invention includes a stepped locking step 51 formed on the slider 37;
A lock plate 55 slidably provided on the lock main body B and stepwise locked to the locking step portion 51 as the slider 37 retreats to prevent the slider 37 from moving forward; A long hole 69 which engages with a fixing pin 71 fixed to the side plate 39 of the lock body B to support the hook 15 so as to rotate and move linearly; and the slider provided on the hook 15 An interlocking pin 73 that engages with the lever 37 to move the hook hook 15 in accordance with the movement of the slider 37;
The claw hook 15 formed on the side plate 39 of the lock body B having a continuous curved portion 75a and a straight portion 75b and driven by the slider 37 by slidably engaging the interlocking pin 73. And a main body guide hole 75 that regulates the movement so as to be linearly moved after being rotated to project from the front plate 31 and then to be drawn into the lock body.

In the locking / unlocking device 1 for a sliding door, the slider 3
When the slider 7 is retracted, the lock plate 55 is gradually locked to the locking step 51 of the slider 37, and the slider 37 is prevented from moving forward. That is, the more the slider is retracted, the more the slider 37 is locked at the deeper retracted position. On the other hand, the hook 15
Are supported by the fixing pin 71 through the elongated hole 69 and are driven by the movement of the slider 37 through the interlocking pin 73. Further, the interlocking pin 73 is moved along the curved portion 75a and the linear portion 75b of the main body guide hole 75. Therefore, when the interlocking pin 73 moves along the curved portion 75a, the hook hook 15 is rotated and engaged with the strike plate A. Thereafter, when the slider 37 is further retracted, the interlocking pin 73 moves along the linear portion 75b. Then, the hook 15 is linearly moved so as to be pulled into the lock body. At this time, the slider 37 is prevented from moving forward by the lock plate 55. As a result, the hook 15 engaged with the strike plate A is drawn into the lock main body, so that the strike plate A and the hook 15 do not rattle.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a locking and unlocking device for a sliding door according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is an external perspective view of the locking and unlocking device for a sliding door according to the present invention, FIG. 2 is an internal side view of the locking and unlocking device for a sliding door shown in FIG. 1, and FIG. 3 is locking of the locking and unlocking device for a sliding door shown in FIG. FIG. 4 is an internal side view of the sliding door locking / unlocking device shown in FIG. 1 in a locked state, and FIG. 5 is an internal side view of the sliding door locking / unlocking device with the hook hook drawn.

[0013] Sliding door locking and unlocking apparatus 1 according to the present embodiment.
Are roughly divided into a sliding door strike plate A provided in the vertical frame 3 and a lock main body B provided in the sliding door 5.

The strike plate A is composed of a trowel 7, a hook 9 and a decorative plate 11. The strike plate A is attached to the vertical frame 3 on which the vertical frame 13 of the sliding door 5 abuts, and the hook 9 is engaged with the hook 15 protruding from the lock body B built in the sliding door 5.

The troyoke 7 has a box-shaped recess 17 which is open on one side. A flange portion 19 is formed to extend from upper and lower opening edges of the concave portion 17, and a screw hole is formed in the flange portion 19. The troyoke 7 has a concave portion 17 provided in the vertical frame 3,
The flange 19 is attached so as to be parallel to the door stop surface of the vertical frame 3. A screw insertion hole is formed in a pair of opposing side walls of the concave portion 17, and a metal fixing screw 21 for fixing the hook engagement metal 9 is inserted into the screw insertion hole.

The hook fitting 9 has a pair of legs 22 with long plates facing in parallel. The length of the leg 22 is substantially the same as the length of the recess 17 in the vertical direction. The lower end of the leg 22 is formed to be substantially equal to the inner size of the recess 17 in the width direction, while the upper end is formed to have a smaller width. The plate width of the leg 22 is formed substantially equal to the inner size of the recess 17 in the depth direction.

At the upper end of the leg 22, a hook 23 bent in a U-shape is bridged. That is, the pair of legs 22
The hooks 23 are integrally connected. Therefore, in the kama engagement fitting 9, only the engaging portion 23 protrudes from the concave portion 17 in a state where the leg portion 22 is accommodated in the concave portion 17.

A screw hole is formed at the lower end of each leg 22. A fitting fixing screw 21 inserted into the recess 17 is screwed into the screw hole. Accordingly, the trowel 7 and the clasp engagement fitting 9 are integrally fixed by the fitting fixing screw 21.

The decorative plate 11 has a hook entry hole 25 for penetrating the hook 23 of the hook 9 and allowing the hook 15 projected from the vertical frame 13 of the sliding door 5 to enter the recess 17.
Are formed. The upper half portion of the kama entry hole 25 is formed to be substantially the same as the width of the engaging portion 23 of the kama engaging metal fitting 9, and the lower half portion is formed to be substantially the same as the thickness of the kama hook 15. That is, after the tip of the hook 15 enters the recess 17 from the lower half of the hook entry hole 25, the hook 15 engages with the back surface of the hook 23.

A bent portion 27 bent toward the inside of the concave portion 17 is formed at each of a pair of opposing edges of the lower half of the hole 25. This bent part 27
Is projected inside leg 22 housed in recess 17,
The legs 22 are arranged so as to be sandwiched between the inner wall of the recess 17 and the inner wall of the recess 17.

The decorative plate 11 is provided with a pair of upper and lower mounting holes. The decorative plate 11 is fixed to the vertical frame 3 substantially flush by inserting the decorative plate fixing screw 29 inserted into the mounting hole into the trowel 7 and the vertical frame 3 and screwing the same. The hook engagement metal 9 is prevented from falling out of the recess 17 of the trocar 7 in a double manner by the metal fixing screw 21 and the decorative plate 11. In addition, as shown in FIG. 2, the hook 23 of the hook 9 is protruded from the surface of the decorative board 11 in a state of being attached to the vertical frame 3.

On the other hand, the lock body B is provided inside the end of the sliding door 5. A front plate 31 is attached to the lock body B, and the front plate 31 is attached by a front plate fixing screw 33 so as to be flush with the vertical frame 13. The front plate 31 is provided with an opening 35 for projecting the hook 15 and a trigger portion 47 to be described later.

Inside the lock body B, a slider 37 is slidably provided in the same direction as the opening and closing direction of the sliding door 5. The slider 37 is slidably supported by the side plate 39 by a first guide hole 43 and a second guide hole 45 formed in the side plate 39 of the lock body B.

The distal end of the slider 37 has a trigger 47
And can protrude from the opening 35 of the front plate 31 described above. A slider urging spring 49 is provided between the slider 37 and the rear wall of the lock body B, and the slider urging spring 49 urges the slider 37 in a direction in which the trigger portion 47 projects.

The upper edge of the slider 37 has a slider 3
A stepped locking step portion 51 is formed which is inclined downward toward the tip end of No. 7. The locking step 51 in the present embodiment includes four steps 51a, 51b, 51c, and 51d.
Consists of

Inside the lock body B, there is provided a lock plate 55 rotatable around a shaft 53 fixed to the side plate 39. A locking claw 57 is provided at the rotating tip of the lock plate 55,
A release claw 59 is formed. The lock plate 55 is urged by a lock plate urging spring 61 in a direction in which the locking claw 57 contacts the upper edge 51 e of the slider 37.

Accordingly, the lock plate 55 is
Is moved in the direction of retreating inside the lock body B, so that the locking claw 57 is locked to the locking step portion 51 in a stepwise manner. That is, the slider 37 is pushed into the lock body B against the urging force of the slider urging spring 49, so that the locking claws 57 of the lock plate 55
a, 51b, 51c, 51d are sequentially locked,
The return in the forward direction is prevented.

A lock / unlock switch plate 63 is provided inside the lock body B so as to be slidable in the vertical direction. The lock / unlock switch plate 63 engages a vertically long engagement hole 65 with a release claw 59 of the lock plate 55. ing. The locking / unlocking switching plate 63 is vertically movably supported by a vertically extending third guide hole 67 formed in the side plate 39.

The locking / unlocking switching plate 63 is operatively connected to an operation unit (not shown), for example, a slide lever or a swing lever, which is exposed on the surface of the sliding door 5, and is slid up and down by operating this operation unit. It is being moved. Further, the locking / unlocking switching plate 63 is urged to one of the upper end or the lower end by a switching plate spring 68. The locking / unlocking device 1 for a sliding door according to the present embodiment includes
3 is arranged at the upper end, the unlocked mode (FIGS. 2 and 3
State), and the locking / unlocking switching plate 63 is disposed at the lower end, thereby entering the locking mode (the state of FIGS. 4 and 5).

When the locking / unlocking switching plate 63 is at the upper end position, the lock plate 55 is in the upper position to keep the locking claw 57 and the locking step 51 out of engagement. When 63 is at the lower end position, the locking claw 5
The locking plate 55 holding the lock 7 is moved upward by the sliding operation of the locking / unlocking switching plate 63 so that the locking claw 57 is moved to the locking step 5.
1 and is lifted from 1 to release the engagement with the slider 37. The slider 37 unlocked by the lock plate 55 is projected again from the front plate 31 by the urging force of the slider urging spring 49.

The lock hook 15 is provided below the slider 37 inside the lock body B. Kama Hook 15
Is provided with a long hole 69, and the hook 15 is
The fixing pin 71 fixed to the side plate 39 is inserted through the supporting member so that the side plate 39 is rotatably and linearly movable.

The hook 15 is provided with an interlocking pin 73. The interlocking pin 73 is engaged with an interlocking recess 37 a formed on the lower edge of the slider 37. Kama Hook 15
Is configured to engage the interlocking pin 73 with the interlocking concave portion 37a so as to follow the reciprocation of the slider 37.

The side plate 39 of the lock body B is formed with a body guide hole 75 in which a substantially arcuate curved portion 75a and a straight portion 75b are continuously formed. The above-described interlocking pin 73 is engaged with the main body guide hole 75. That is, the interlocking pin 73 moves the hook hook 15 by the reciprocation of the slider 37 and is moved along the main body guide hole 75.

The hook 15 is connected to the link pin 73 by a curved portion 75.
a, the tip claw 15a is rotated about 90 ° in the clockwise direction in the figure around the fixing pin 71, and the front claw 15a is moved.
Projected from. When the interlocking pin 73 moves along the linear portion 75b, the hook hook 15 is moved in the longitudinal direction of the elongated hole 69 with respect to the fixing pin 71, and is moved so as to be drawn into the lock body B.

A latch plate 81 is provided on the side plate 39 of the lock body B. The latch plate 81 is rotatably supported by a latch rotation pin 83 fixed to the side plate 39.
On the outer periphery of the latch plate 81, a plurality of latch claws 85 arranged in the rotation direction are formed. The latch plate 81 is formed with a latch hole 87 which is a long hole, and a slider pin 89 protruding from the slider 37 is engaged with the latch hole 87.

That is, the latch plate 81 is
The slider 37 is connected to the slider 37 via the slider 9 so that the slider 37 is rotated following the advance and retreat of the slider 37. Conversely, the slider 37 is prevented from sliding by the rotation of the latch plate 81 being restricted.

A lock release plate 91 is provided on the side plate 39 of the lock body B below the latch plate 81. The lock release plate 91 is supported by a release plate guide pin 93 fixed to the side plate 39 so as to be slidable vertically in FIG. 2 via a release plate slide hole 95 which is a long hole. Although not shown, the lock release plate 91 is linked to an operation lever or an operation slider exposed on the surface of the sliding door 5 to be operated.

A release plate spring 97 as a release plate urging member is disposed between the lower edge of the lock body B and the lock release plate 91. The release plate spring 97 urges the lock release plate 91 to a position where one end in the longitudinal direction of the release plate slide hole 95 (the lower end of the release plate slide hole 95 shown in FIG. 1) contacts the release plate guide pin 93. Lock release plate 91 to latch plate 81
Is biased in a direction approaching the.

A locking plate 101 whose base end is rotatably supported by a locking plate rotating pin 103 is provided on the side plate 39 of the lock body B. The leading end of the locking plate 101 overlaps the locking release plate 91. A locking plate pin 105 protrudes from the front end of the locking plate 101, and the locking plate pin 1
05 is a locking plate connecting hole 107 formed in the locking release plate 91.
Is engaged. That is, the lock plate 101 is connected to the lock release plate 91 via the lock plate pin 105, and swings following the vertical slide of the lock release plate 91.

The upper end of the locking plate 101 has a locking piece 1
09 are provided integrally. The locking piece 109 is configured to be locked to the latch claw 85 of the latch plate 81 which is rotated following the retreat of the slider 37. Latch plate 8
1 is that the latch claw 85 is locked by the locking piece 109, whereby the rotation is restricted. Therefore, the slider 37 is prevented from sliding by the latch plate 81 whose rotation is restricted. When the lock release plate 91 is slid, the lock plate 101 is rotated via the lock plate pin 105 and the latch pawl 85
The lock of the locking piece 109 is released.

Next, the operation of the thus configured sliding door locking / unlocking device 1 will be described. First, a description will be given of a temporary locking state in which the locking / unlocking switching plate 63 is in the unlocking mode, that is, when the sliding door 5 is closed, the sliding door 5 keeps the closed state.

As shown in FIG. 2, when the sliding door 5 is not closed, the slider 37 is urged to the left in the figure by the urging force of the slider urging spring 49, and the trigger portion 47 is projected from the front plate 31. Becomes On the other hand, as shown in FIG. 1, the engagement portion 23 of the hook engagement metal fitting 9 projects from the strike plate A at a position corresponding to the trigger portion 47.

In this state, the hook 15 is connected to the interlocking pin 73.
Is located at the left end in FIG. 2 of the curved portion 75a, and is housed inside the lock body B.

When the sliding door 5 is moved in the closing direction, the trigger portion 47 comes into contact with the hook 23 of the hook 9.

When the sliding door 5 is further moved in the closing direction,
The trigger portion 47 is pressed by the engaging portion 23, and the slider 37 is retracted inside the lock body B against the slider urging spring 49 as shown in FIG.

When the slider 37 is retracted, the slider 3
7, the interlocking pin 73 of the hook 15 engaged with the interlocking recess 37a is moved along the curved portion 75a, and the hook 15 is turned around the fixing pin 71 in the clockwise direction in the figure. When the slider 37 is further retracted and the interlocking pin 73 reaches the right end of the curved portion 75a as shown in FIG. 3, the hook 15 is in a horizontal state.

As a result, as shown in FIG.
5 is a state in which the tip claw 15a is engaged with the back surface of the engaging portion 23. At this time, as shown in FIGS. 2 and 3, since the release pawl 59 is engaged with the locking / unlocking switching plate 63, the rotation of the lock plate 55 is restricted, and the locking pawl 57 is moved to the stepped portion 51 a. Not locked. On the other hand, the latch plate 81 is
9 is rotated clockwise in FIG.
Are locked to the locking pieces 109 of the locking plate 101. Therefore,
The slider 37 is locked by the locking plate 101 via the latch plate 81, and is prevented from moving in the forward direction. Sliding door 5
Is kept in a closed state and is in a temporarily locked state.

When the sliding door 5 is further moved in the closing direction from this state, the slider 37 is further pushed into the lock body B by the hook 23 of the hook 9. Then, the latch plate 81 is further rotated clockwise in the drawing, and the plurality of latch claws 85 formed on the outer periphery are sequentially locked by the locking pieces 109.

With the movement of the slider 37 to the back of the lock body B (to the right in the figure), the hook hook 15 is fixed while the interlocking pin 73 is moved along the linear portion 75b of the body guide hole 75. The pin 71 is horizontally moved in the longitudinal direction of the long hole 69 with respect to the pin 71 and is drawn into the lock body B.

In order to release the engagement between the hook 9 and the hook 15 in the temporary locking state in the unlocking mode, an operation of sliding the unlocking plate 91 downward is performed. Then, the locking plate 101 is swung in the counterclockwise direction in the figure in conjunction with the slide, and the latch claw 85 of the locking piece 109 is rotated.
Is released. As a result, the slider 37
The lock with the locking plate 101 via the latch plate 81 is released, and the slider 47 is moved in the direction in which the trigger portion 47 is protruded by the urging force of the slider urging spring 49.

Simultaneously, the interlocking pin 73 engaged with the interlocking concave portion 37a is moved to the left of the curved portion 75a, the hook hook 15 is rotated counterclockwise, and the engagement with the hook engaging bracket 9 is released. Then, as shown in FIG. As a result, the temporary lock between the strike plate A and the lock body B is released, and the sliding door 5 can be opened again.

In this unlocking mode, after the sliding door 5 is closed and temporarily locked, the lock / unlock switching plate 63 is operated and slid downward, so that the lock plate 55 is brought into contact with the lock plate urging spring. As shown in FIGS. 4 and 5, the urging force of 61 rotates clockwise in the figure, and the locking claw 57 is locked to the stepped portion 51. Thereby, the slider 37
Will be prevented from moving in the forward direction. Further, the hooks 1 that follow the slider 37 via the interlocking pin 73
5, the rotation in the counterclockwise direction in the figure is also prevented.

That is, the slider 37 is locked by both the lock plate 55 and the lock plate 101, and is prevented from moving in the forward direction. That is, the sliding door 5 is locked to the strike plate A via the hook 15.

Next, a case where the lock / unlock switching plate 63 is in the lock mode, that is, a case where the sliding door 5 is locked when the sliding door 5 is closed will be described. In this locking mode, the locking / unlocking switching plate 63 is slid down in advance to enter the locking mode.

When the sliding door 5 is not closed, the slider 37 is urged to the left in the drawing by the urging force of the slider urging spring 49, and the trigger portion 47 projects from the front plate 31 (see FIG. 2). . On the other hand, as shown in FIG. 1, the engagement portion 23 of the hook engagement metal fitting 9 projects from the strike plate A at a position corresponding to the trigger portion 47.

In this state, the hook 15 is connected to the interlocking pin 73.
Is located at the left end of the bent portion 75a in the drawing, and is housed inside the lock body B.

When the sliding door 5 is moved in the closing direction, the trigger portion 47 comes into contact with the hook portion 23 of the hook 9.

When the sliding door 5 is further moved in the closing direction,
The trigger portion 47 is pressed by the engaging portion 23, and the slider 37 is retracted inside the lock body B against the slider urging spring 49 as shown in FIG.

When the slider 37 is retracted, the slider 3
7, the interlocking pin 73 of the hook 15 engaged with the interlocking recess 37a is moved along the curved portion 75a, and the hook 15 is turned around the fixing pin 71 in the clockwise direction in the figure. When the slider 37 is further retracted and the interlocking pin 73 reaches the right end of the curved portion 75a, as shown in FIG. 4, the hook 15 is in a horizontal state.

As a result, as shown in FIG.
5 is a state in which the tip claw 15a is engaged with the back surface of the engaging portion 23. In this state, the lock plate 55 is rotated clockwise in the drawing by the urging force of the lock plate urging spring 61,
The locking claw 57 is locked to the step portion 51. As a result, the movement of the slider 37 in the forward direction is prevented.

Also, the hook 15 that follows the slider 37 via the interlocking pin 73 is prevented from rotating counterclockwise in the figure. That is, the sliding door 5 is locked to the strike plate A via the hook 15.

At the same time, the latch plate 81 is rotated clockwise in FIG.
The locking piece 109 of the locking plate 101 is locked to the latch claw 85 of FIG.

That is, the slider 37 is locked by both the lock plate 55 and the locking plate 101, and is prevented from moving in the forward direction to be in a locked state. In this locking mode, only the operation of closing the sliding door 5 is performed. Thus, locking can be performed automatically.

When the sliding door 5 is further moved in the closing direction from this state, as shown in FIG. 5, the slider 37 is further pushed into the lock body B by the engaging portion 23 of the hook 9. Become. Then, the locking step 51 of the slider 37 moves rightward in the drawing, so that the lock plate 55
The locking claws 57 are sequentially moved down to the step portions 51b, 51c, 51.
Lock to d. Further, the latch plate 81 is further rotated clockwise in the drawing, and the plurality of latch claws 85 formed on the outer periphery are sequentially locked by the locking pieces 109.

With the movement of the slider 37 to the right in FIG. 5, the hook hook 15 moves the interlocking pin 73 into the main body guide hole 75.
5 is moved along the straight portion 75b of FIG.
As shown in (2), it is drawn into the lock body B.

On the other hand, in order to release the engagement between the hook 9 and the hook 15, ie, to perform the unlocking operation, first, the locking / unlocking switching plate 63 is moved upward. Locking / unlocking switching plate 6
When the slide 3 is slid upward, the lock plate 55 is rotated counterclockwise in the figure via the release claw 59 engaged with the engagement hole 65, whereby the locking claw 57 is moved to the locking stepped portion. 51 will be removed. Thereby, the lock between the lock plate 55 and the slider 37 is released.

Next, when the lock release plate 91 is slid downward, the lock plate 101 is rotated counterclockwise in the figure, and
The locking of the locking piece 109 to the latch claw 85 is released. As a result, the lock of the lock plate 55 and the lock plate 101 via the latch plate 81 of the slider 37 are both released. Therefore, the slider 37 is moved in a direction in which the trigger portion 47 is protruded by the urging force of the slider urging spring 49.

At the same time, the interlocking pin 73 engaged with the interlocking concave portion 37a is moved to the left of the curved portion 75a in the figure, and
5 is rotated counterclockwise in the figure, the engagement with the hook engagement metal fitting 9 is released, and as shown in FIG. As a result, the lock between the strike plate A and the lock body B is released, and the sliding door 5 can be opened again.

As described above, according to the locking / unlocking device 1 for the sliding door, when the sliding door 5 is closed, the trigger portion 47 comes into contact with the strike plate A, and the slider 37 is retracted into the lock body B. Then, the latch plate 81 is rotated, and the latch claws 85 of the latch plate 81 are locked on the locking pieces 109 of the locking plate 101, so that the rotation of the latch plate 81 is restricted. That is, the advance / retreat of the slider 37 is restricted via the latch plate 81 whose rotation is restricted.

As a result, the sliding door 5 is not moved in the direction opposite to the closing direction by the biasing force of the slider 37 biased in the forward direction, and the sliding door 5 is maintained in the closed state. As a result, no gap is formed between the vertical frame 3 and the sliding door 5 due to the repulsive force of the slider 37.

Further, since the movement of the slider 37 is restricted, the rotation of the hook 15 following the slider 37 is also restricted. As a result, the hook 15 engaged with the strike plate A is rotated. Blocked, a pseudo locked state, that is, a temporary locked state can be achieved. When the lock mode is set, the lock plate 55 further moves the slider 37.
To the double locking state, and the security is improved.

According to the locking and unlocking device 1 for a sliding door,
When the slider 37 is retracted, the lock plate 55 is locked stepwise by the locking step 51 of the slider 37, and the slider 37 is locked.
Is being stopped. That is, the more the slider is retracted, the more the slider 37 is locked at the deeper retracted position. on the other hand,
The hook hook 15 is supported by the fixing pin 71 through the elongated hole 69 and is driven by the movement of the slider 37 through the interlocking pin 73. Also, the link pin 73
Is moved along the curved portion 75a and the straight portion 75b of the main body guide hole 75. Therefore, the interlocking pin 7
3 moves the curved portion 75a, so that the hook 15 is rotated and engaged with the strike plate A. Thereafter, when the slider 37 is further retracted, the interlocking pin 73 moves along the linear portion 75b, and the The hook 15 is moved linearly so as to be pulled into the lock body. At this time, the slider 37 is prevented from moving forward by the lock plate 55. Thereby, the hook 15 engaged with the strike plate A can be drawn into the lock body, the rattle between the strike plate A and the hook 15 can be eliminated, and the gap between the vertical frame 3 and the sliding door 5 can be eliminated. It is possible to reduce the gap (dust).

Since the hook 23 of the hook 9 is projected from the strike plate A, when the sliding door 5 is closed, the hook 9 comes into contact with the slider 37 and the sliding door 5 is further closed. Then, the slider 37 is pressed by the hook engaging metal 9 and is pushed into the lock body B together with the hook engaging metal 9. As a result, the engagement portion between the hook engagement metal fitting 9 and the hook hook 15 is concealed inside the lock body B, and the security can be enhanced.

In the above-described embodiment, the movement of the slider 37 is restricted by the lock plate 55 and the locking step 51, and the slider 37 is controlled by the latch plate 81 and the locking plate 101.
In the above description, the locking mode and the unlocking mode can be selected. However, in order to perform only the temporary locking state in which the sliding door 5 is maintained in the closed state, the connection with the latch plate 81 is required. What is necessary is just to provide the structure with the stop plate 101.

In the above-described embodiment, the locking state of the locking door 55 is maintained by using the locking / unlocking switching plate 63 and maintaining the locked state of the locking plate 55 and the locking step 51 in the configuration for locking the sliding door 5. However, if, for example, a thumb turn, a cylinder lock, or the like is interlockingly connected to the locking plate 101 that locks to the latch plate 81, the advanced state of the hook 15 is maintained, that is, the latch plate 81, locking plate 10
1. The locking / unlocking device can be constituted by the lock release plate 91.

[0076]

As described above in detail, according to the locking / unlocking device for a sliding door according to the present invention, the latch plate having the latch pawl formed on the outer periphery is rotatably provided following the advance and retreat of the slider. A locking plate that locks the locking piece to the latch plate that has been rotated following the retreat of the slider to restrict the rotation of the latch plate is provided, and the locking plate is rotated by being slid,
Since the locking release plate for releasing the locking of the locking piece to the latch claw is provided, the sliding door is closed, and when the tip of the slider comes into contact with the strike plate and is retracted inside the lock body, the latch plate is released. Is rotated, the latch claw of the latch plate is locked to the locking piece of the locking plate, and the rotation of the latch plate is regulated. That is, the advance / retreat of the slider is regulated via the rotation-regulated latch plate. Thereby, the sliding door can be prevented from moving in the direction opposite to the closing direction due to the biasing force of the slider biased in the forward direction, and the sliding door can be kept in the closed state, that is, it can be in the temporarily locked state. Becomes
Further, it is possible to eliminate a gap generated between the vertical frame and the sliding door due to the repulsive force of the slider.

Further, the lock plate is gradually locked to the locking step of the slider, and the long hole of the hook is engaged with the fixing pin to support the hook so that it can rotate and move linearly. Since the interlocking pin of the driven hook is engaged with the main body guide hole including the curved portion and the straight portion, the hook is engaged with the strike plate by following the slider, and then the sliding door is further moved in the closing direction. Thus, the hook can be linearly moved so as to be pulled into the lock body by following the retraction of the slider. As a result, the hook hook engaged with the strike plate can be pulled into the lock main body to be in the locked state, the movement of the slider is restricted by the lock plate and the locking step, and the latch plate and the locking plate can be locked. And a double locking state that also serves to restrict the movement of the slider, thereby eliminating rattling between the strike plate and the hook, and reducing the gap (dust) between the vertical frame and the sliding door. And security is enhanced.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a locking and unlocking device for a sliding door according to the present invention.

FIG. 2 is an internal side view of the locking and unlocking device for a sliding door shown in FIG. 1;

3 is an internal side view of the locking and unlocking device for a sliding door shown in FIG. 1 in a locked state.

4 is an internal side view of the locking and unlocking device for a sliding door shown in FIG. 1 in a locked state.

FIG. 5 is an internal side view of the locking / unlocking device for a sliding door to which a hook is drawn.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Sliding door locking / unlocking device 5 ... Sliding door 15 ... Kama hook 25 ... Kama entry hole 31 ... Front plate 37 ... Slider 39 ... Side plate 47 ... Tip part (trigger part) 51 ... Locking step part 55 ... Lock plate 69 ... Length Hole 71: fixing pin 73: interlocking pin 75: body guide hole 75a: curved portion 75b: linear portion 81: latch plate 85: latch claw 91: lock release plate 97: urging member for release plate (spring for release plate) 101: locking plate 109: locking piece A: strike plate B: lock body

Claims (2)

[Claims] 1. A front end of a slider protruding from a front plate of a lock body is retracted into the lock body by abutting on a strike plate together with closing of a sliding door, and the front end plate is moved from the front plate in conjunction with the retraction of the slider. A locking and unlocking device for a sliding door for engaging a protruding hook with a hook entry hole of the strike plate, having a latch claw on an outer periphery, rotatably supported by a side plate of the lock body, and A latch plate that is connected to the slider and is rotated by the advance and retreat of the slider; and a release plate that is slidably guided by the side plate of the lock body and that slides toward one end in a direction approaching the latch plate. A latch release plate which is urged by the urging member, and a latch of the latch plate which has a locking piece, is rotatably supported by the side plate of the lock body, and is rotated by the retreat of the slider. The lock on the nail A locking plate for locking the piece and restricting the rotation of the latch plate, while rotating following the slide of the locking release plate and rotating to release the locking of the locking piece to the latch claw; A locking and unlocking device for a sliding door, comprising: 2. A stepped locking step formed on the slider, and a stepped lock provided on the lock main body, the step being locked to the locking step as the slider retreats. A lock plate for preventing the slider from advancing, an elongated hole formed in the hook and engaged with a fixing pin fixed to a side plate of the lock body to support the hook in a rotatable and linear manner. An interlocking pin that is provided on the hook and engages with the slider to move the hook in accordance with the advance and retreat of the slider; and a continuous curved portion and a straight portion formed on the side plate of the lock body, A body guide that regulates the movement so that the hook hook driven by the slider is rotated and protruded from the front plate by being slidably engaged with the interlocking pin, and then linearly moved and drawn into the lock body. And a hole. Motomeko 1 sliding door for locking and unlocking device according.