JP3693773B2 - Locking device for sliding door - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a locking device for a sliding door, and in particular, can prevent the locking device from being damaged when the sliding door is forcibly opened or roughly closed.
[0002]
[Prior art]
The present applicant has already proposed a sliding door locking device in which the opening direction of the sliding door matches the operation direction of the locking device so that the unlocking operation of the locking device can be easily performed (for example, a patent application). Hei 8-1555046).
[0003]
[Problems to be solved by the invention]
However, after the proposal of the locking device described above, a new problem that could not have been anticipated occurred.
That is, since children and the like open and close the slide door, the breakage of the lock device becomes a problem.
[0004]
For example, when the slide door is locked in the closed state by the lock device, the slide door may be forcibly opened without operating the slider for operating the lock device.
At this time, the rotary hook on the slide door side is in a state of being caught in the lock hole on the cabinet side.
[0005]
For this reason, since the rotary hook opposes the force for forcibly opening the slide door, an excessive force is applied to the rotation shaft of the hook, and the rotation mechanism of the hook may be damaged.
Moreover, if the cabinet is closed violently, the cabinet may collide with the cabinet door before the rotary hook rotates.
[0006]
For this reason, when the rotary hook collides with the door stop on the cabinet side, an excessive force is applied to the rotating shaft of the hook, and the rotating mechanism of the hook may be damaged.
Therefore, the present invention has been made in view of the above-mentioned new problems, and the object thereof is as follows.
(Claim 1)
That is, the invention according to claim 1 aims at the following points.
[0007]
That is, when the sliding door is opened and closed roughly, the locked state is released, and the lock device can be prevented from being damaged.
(Claim 2)
The invention described in claim 2 has the following object in addition to the object of the invention described in claim 1 described above.
[0008]
That is, the operability of the slider can be improved. Specifically, by urging the slider in the lock direction, the operation of the slider in the lock direction can be omitted.
(Claim 3)
The invention described in claim 3 has the following object in addition to the object of the invention described in claim 1 or claim 2.
[0009]
That is, the operability of the slider can be improved as in the object of the invention described in claim 2.
Specifically, when the slide door is closed, the locked state of the latch device is once released so that the operation of the slider when the slide door is closed can be reduced.
[0010]
Then, in combination with the invention described in claim 2, the operation of the slider when closing the slide door can be omitted.
[0011]
[Means for Solving the Problems]
(Feature point)
Each invention described in each claim has been made to achieve each of the above-mentioned objects, and features of each invention will be described below using embodiments of the invention shown in the drawings. .
(Claim 1)
The invention described in claim 1 is characterized by the following four points.
[0012]
First, the latch device (60) includes a slider (80) and a lock arm (90) as shown in FIG. 4, for example.
The slider (80) is slidable in the sliding direction of the slide door (30).
The lock arm (90) slides in the vertical direction by sliding the slider (80) in the direction in which the slide door (30) opens, and when this slides, the lock arm (90) is unlocked from the lock position (see FIGS. 5 to 7). (See FIGS. 8 to 10).
[0013]
Second, the latch receiver (50) includes a slide groove (51) and a lock wall (55) as shown in FIG. 3, for example.
The slide groove (51) receives the lock arm (90) and allows the lock arm (90) to slide up and down.
The lock wall (55) is positioned along the slide groove (51). For example, as shown in FIG. 5, at the lock position of the lock arm (90), the lock arm (90) moves from the slide groove (51). It will prevent you from exiting.
[0014]
Thirdly, as shown in FIGS. 3 and 6, for example, the slide groove (51) is open so that one surface (for example, the front surface) faces the opening (41) of the cabinet (20).
Fourthly, the distal end portion of the lock arm (90) is provided with an arm portion (91) as shown in FIGS.
The arm portion (91) extends in a curved manner from the open surface (for example, the front surface) of the slide groove (51) toward the bottom of the slide groove (51), and in the locked position of the lock arm (90), for example, FIG. As shown in FIG. 6, it abuts against the lock wall (55) and prevents the lock arm (90) from coming out of the slide groove (51).
[0015]
Further, the arm portion (91), when an excessive force is applied to the lock arm (90) in the opening direction of the sliding door (30), for example, as shown in FIG. 1, so as to get over the lock wall (55). And is pulled out from the open surface (for example, the front surface) of the slide groove (51).
(Claim 2)
The invention described in claim 2 is characterized by the following points in addition to the features of the invention described in claim 1 described above.
[0016]
That is, as shown in FIG. 4, for example, the biasing means (for example, the spring 100) includes a biasing means (for example, the spring 100) in the latch device, and the slider (80) is closed by the slide door (30). By urging in the direction, the lock arm 90 is urged from the unlock position (see, for example, FIGS. 9 and 10) toward the lock position (see, for example, FIGS. 6 and 7).
[0017]
As the biasing means, for example, the spring (100) is used, but the present invention is not limited to this, and a leaf spring or the like may be used. Conversely, by urging the lock arm (90) from the unlock position (eg, see FIGS. 9 and 10) toward the lock position (eg, see FIGS. 6 and 7), the slider (80) is moved to the slide door (see FIG. It is also possible to adopt a configuration in which 30) is biased toward the closing direction.
(Claim 3)
The invention described in claim 3 has the following features in addition to the features of the invention described in claim 1 or claim 2.
[0018]
That is, a tapered surface (56, 93) is provided between the lock wall (55) of the latch receiver (50) and the arm portion (91) of the lock arm (90) as shown in FIGS. The tapered surfaces (56, 93) slide the lock arm (90) from the lock position (for example, see FIG. 5) toward the lock release position (for example, see FIG. 8).
[0019]
The tapered surfaces (56, 93) are provided on both the lock wall (55) of the latch receiver (50) and the arm portion (91) of the lock arm (90). It may be provided only in
[0020]
DETAILED DESCRIPTION OF THE INVENTION
(Explanation of drawings)
1 to 10 show an example of an embodiment of the present invention.
1 is a sectional view of the locking device, FIG. 2 is a perspective view of the cabinet, FIG. 3 is a perspective view of the locking device, FIG. 4 is an exploded perspective view of the latch device, FIG. 5 is a front view of the locking device, and FIG. 5 is a sectional view taken along line VI-VI, and FIG. 7 is a rear view of the latch device of FIG.
[0021]
8 to 10 show the unlocked state of the lock device, FIG. 8 corresponds to FIG. 5, and FIG. 9 is a front view of the lock device, FIG. 9 corresponds to FIG. 10 corresponds to FIG. 7 and shows a rear view of the latch device of FIG.
(Locking device)
1-3, 10 shows a locking device, and this locking device 10 is used for the sliding door 30 of the cabinet 20, as shown in FIG.
[0022]
As shown in FIG. 2, the cabinet 20 has a hollow box-shaped cabinet body 40 having an opening 41 on the front surface, and is slidably attached to the opening 41 of the cabinet body 40, and opens and closes the opening 41. Two slide doors 30 and 30 are provided.
The two slide doors 30 can be opened and closed in a sliding manner as shown in FIG.
[0023]
A total of two locking devices 10 are used between the two sliding doors 30 and the left and right door contact portions 42 of the cabinet body 40.
As shown in FIG. 3, each of the lock devices 10 is roughly divided into a latch receiver 50 attached to the door stop portion 42 of the cabinet body 40, and a latch device locked to the latch receiver 50 and attached to the slide door 30. 60.
[0024]
Further, as shown in FIG. 3, a substantially square latch receiving mounting hole 43 that opens laterally toward the sliding door 30 is provided in the door stop portion 42 of the cabinet body 40. Further, as shown in FIG. 3, a substantially square latch receiving mounting hole 43 that opens laterally toward the sliding door 30 is provided in the door stop portion 42 of the cabinet body 40. 5 and 6, the latch receiver 50 is mounted so as to protrude from the door stop portion 42 of the cabinet body 40. However, the present invention is not limited thereto, and for example, the latch device 60 enters and exits the latch receiver mounting hole 43. It may be used as a hole and attached so that the latch receiver 50 is retracted into the latch receiver mounting hole 43, that is, the latch receiver 50 is housed inside the cabinet body 40.
[0025]
In this way, the latch device 60 is engaged with the latch receiver 50 through the latch receiver mounting hole 43, and can be locked and unlocked.
Thus, when the latch receiver 50 is stored inside the cabinet body 40, the protrusion of the latch receiver 50 from the door stop portion 42 can be eliminated, and the latch body 50 can be latched when the stored items in and out of the cabinet body 40 are taken in and out. It is possible to prevent the receiver 50 from getting in the way.
[0026]
The latch receiver 50 may be stored inside the cabinet body 40, flush with the door stop 42, or may be stored so as to be slightly retracted, or stored so as to protrude slightly. good.
Further, as shown in FIG. 2, a pair of rubber cushion members 44 that are in contact with the slide door 30 are attached to the door stop portion 42 of the cabinet body 40.
[0027]
On the other hand, as shown in FIG. 3, the slide door 30 is provided with a substantially square latch mounting hole 31 opened toward the front.
(Latch device)
First, the latch device 60 will be specifically described with reference to FIGS.
As shown in FIG. 4, the latch device 60 includes a case 70, a slider 80, a lock arm 90, and a spring 100, and other parts 80 to 100 are incorporated in the case 70 in a unit shape.
(Case)
As shown in FIG. 6, the case 70 is fixed to the latch mounting hole 31 of the sliding door 30 in an embedded state.
[0028]
As shown in FIG. 3, the case 70 is roughly divided into a latch mounting hole 31 and a housing recess 110 that houses the slider 80 so as to be slidable in the left-right direction, and projects from the periphery of the housing recess 110. A protruding edge 120 that is slightly larger than the front latch mounting hole 31, a protruding edge 130 that alternately protrudes from the bottom wall of the storage recess 110, and a rear surface of the bottom wall of the storage recess 110, and extends the lock arm 90 up and down. A pair of upper and lower guide pieces 140, 140 that are slidably held in the direction are provided.
[0029]
The case 70 has appropriate rigidity and elasticity, and is integrally formed of a thermoplastic resin such as POM.
As shown in FIG. 4, a rectangular notch 111 is provided on the bottom wall of the storage recess 110.
Further, as shown in FIG. 4, a guide groove 112 is provided on the bottom wall of the housing recess 110 so as to extend from the end surface facing the notch 111 to the middle along the sliding direction of the slider 80 and guide the slider 80. ing.
[0030]
As shown in FIGS. 4 and 7, step portions 113 for guiding the slider 80 are provided on the upper and lower inner surfaces of the storage recess 110 along the sliding direction of the slider 80.
As shown in FIGS. 4, 6, and 7, a plurality of claws 114 and 115 that face away from the back surface of the overhanging edge 120 are provided on the left and right outer surfaces of the storage recess 110.
As shown in FIGS. 4, 6, and 7, one of the claws 114 and 115 is a pair of upper and lower fixed claws 114 and 114 that project in a sawtooth shape from the outer surface of the storage recess 110. It is located on the end face side.
[0031]
On the other hand, as shown in FIGS. 4 and 7, the other claw 115 is opposite to the fixed claw 114 and is bent in a substantially J shape from the outer surface of the housing recess 110 toward the back surface of the overhanging edge 120. A pair of upper and lower movable claws 115, 115 are extended, and both movable claws 115 are attached to the latch attachment holes 31 of the slide door 30 by using the elasticity of resin.
Then, as shown in FIG. 6, the claws 114 and 115 are fitted to the latch mounting holes 31 of the slide door 30 so as to surround the latch mounting holes 31 between the claws 114 and 115 and the back surface of the overhanging edge 120. Hold the front and back of the.
[0032]
As shown in FIGS. 4 and 7, a pair of upper and lower spring receiving pieces 131 and 131 for guiding the spring 100 are provided on the rear surface of the protruding edge 130.
Also, as shown in FIGS. 4 and 7, slider receiving pieces 132 and 132 for guiding the slider 80 are provided above and below the upper and lower spring receiving pieces 131, respectively.
As shown in FIG. 4, the pair of upper and lower guide pieces 140 are provided with guide holes 141 and 141 into which the upper and lower ends of the lock arm 90 are slidably fitted.
(Slider)
As shown in FIGS. 4 and 6, the slider 80 is roughly divided into a front plate 81 that fits into the storage recess 110 of the case 70 and is slidably stored in the storage recess 110 in the left-right direction. A back side plate 82 connected to the back surface of the plate 81 in a U-shaped cross section and located on the back side of the bottom wall through the notch 111 of the storage recess 110 is provided.
[0033]
Similar to the case 70, the slider 80 has appropriate rigidity and elasticity, and is integrally formed of a thermoplastic resin such as POM.
As shown in FIGS. 4 to 6, an operation recess 83 is provided on the surface of the front plate 81.
Further, as shown in FIGS. 4 and 6, guide ribs 84 that fit into the guide grooves 112 of the case 70 are provided on the back surface of the front plate 81. The guide rib 84 slides along the guide groove 112 as the slider 80 slides.
[0034]
Further, as shown in FIGS. 4 and 7, a pair of upper and lower protrusions 85, 85 projecting toward the step 113 of the case 70 are provided on the upper and lower edges of the front plate 81. Each protrusion 85 abuts on each step 113 of the case 70 and slides along each step 113 as the slider 80 slides.
On the other hand, as shown in FIGS. 4, 6 and 7, a boss portion 86 extending toward the space between the upper and lower spring receiving pieces 131 of the case 70 is provided on the side surface of the front plate 81.
[0035]
As shown in FIGS. 6 and 7, a spring 100 is passed through the boss portion 86, and the spring 100 is compressed between the slider 80 and the case 70.
As shown in FIGS. 5 and 6, the slider 80 is normally located at a position close to the latch receiver 50 by the compression restoring force of the spring 100.
At this time, as shown in FIG. 6, the guide rib 84 of the slider 80 abuts against a dead end of the guide groove 112 of the case 70 to receive the compression restoring force of the spring 100.
[0036]
The guide rib 84 and the guide groove 112 receive the compression restoring force of the spring 100. However, the present invention is not limited to this, and other portions of the slider 80 and the case 70 may be in contact with each other.
On the other hand, when the slider 80 is slid in the direction to open the slide door 30 as shown in FIGS. 8 to 10, the spring 100 is compressed between the slider 80 and the case 70. At this time, the boss portion 86 of the slider 80 fits within the space between the upper and lower spring receiving pieces 131 of the case 70 together with the spring 100 as shown in FIG.
[0037]
As shown in FIGS. 8 and 9, the maximum slide amount of the slider 80 is regulated by the end surface projecting laterally of the operation recess 83 coming into contact with the inner surface of the housing recess 110 of the case 70.
Although the maximum slide amount of the slider 80 is regulated by the operation recess 83 and the storage recess 110, the present invention is not limited to this, and other portions of the slider 80 and the case 70 may be in contact with each other.
[0038]
Further, as shown in FIGS. 4 and 6, a pair of upper and lower tongue pieces 87, 87 are provided on the side surface of the front plate 81, which are positioned above and below the boss portion 86 and extend in the same direction as the boss portion 86. Yes. Each tongue piece 87 abuts on the slider receiving piece 132 of the case 70 and slides along the slider receiving piece 132 as the slider 80 slides.
On the other hand, as shown in FIGS. 4 and 6, the back side plate 82 is located away from the front side plate 81, and the bottom wall of the housing recess 110 of the case 70 is located within the space between the front side plate 81 and the back side plate 82.
[0039]
4, 6, and 7, the back side plate 82 converts the slide movement of the slider 80 in the horizontal direction into the vertical movement and transmits it to the lock arm 90, and the slide direction of the slider 80 An oval cam hole 88 is provided which is inclined obliquely and extends long.
(Lock arm)
Next, as shown in FIGS. 4 and 7, the lock arm 90 is formed in a vertically long bar shape, and the upper and lower ends thereof are fitted in the upper and lower guide holes 141 of the case 70, respectively. Is slidable in the vertical direction.
[0040]
4, 6, and 7, the lock arm 90 is curved and extends in a substantially U shape toward the latch receiver 50, and an arm portion 91 that is locked by the latch receiver 50 and a cam hole of the slider 80. The pin 92 fits into the 88.
The lock arm 90 has appropriate rigidity and elasticity like the case 70 and the slider 80 described above, and is integrally formed of a thermoplastic resin such as POM, for example.
[0041]
A tapered surface 93 is formed on the lower edge of the arm portion 91 as shown in FIG.
As shown in FIG. 7, the pin 92 is normally positioned below the cam hole 88, and at this time, the arm portion 91 is in the lowered position.
At this time, the lock arm 90 is in the locked position.
[0042]
On the other hand, when the slider 80 is slid in the direction in which the slide door 30 is opened, the pin 92 rises along the cam hole 88 as shown in FIG.
At this time, the lock arm 90 is in the unlocked position.
(Latch receiver)
Next, the latch receiver 50 will be described with reference to FIGS.
[0043]
As shown in FIGS. 3, 5, and 6, the latch receiver 50 protrudes from the main body 52 having a slide groove 51 in which the arm portion 91 of the lock arm 90 can be slid up and down. 40 is provided with a flange 53 that is slightly larger than the latch receiving attachment hole 43, and a leg 54 that projects backward from the main body 52 with the flange 53 interposed therebetween, and that fits into the latch receiving attachment hole 43.
[0044]
The latch receiver 50 has appropriate rigidity and elasticity, and is integrally formed of, for example, a thermoplastic resin such as POM.
As shown in FIGS. 3, 5, and 6, the slide groove 51 extends vertically and has a front surface on the near side and a side surface toward the latch device 60.
As shown in FIGS. 3, 5, and 6, the main body 52 is provided with a lock wall 55 that closes the lower portion of the open side surface of the slide groove 51, and the arm portion 91 of the lock arm 90 is hooked on the lock wall 55. The arm portion 91 cannot be removed from the slide groove 51.
[0045]
Further, the lock wall 55 is provided with a taper surface 56 inclined obliquely downward and in contact with the taper surface 93 of the arm portion 91 as shown in FIGS. The tapered surface 56 abuts on the tapered surface 93 of the arm portion 91 when the slide door 30 is closed, and raises the arm portion 91 as shown by a two-dot chain line in FIG.
The lock wall 55 is hooked only on the lower half of the arm portion 91 as shown in FIG. 5 at the lock position of the lock arm 90. This is because the upper half of the arm portion 91 is reinforced, and if the arm portion 91 is thinned according to the vertical height of the lock wall 55, the strength is lowered. Of course, when the strength may be low, the arm portion 91 may be thinned according to the vertical height of the lock wall 55. Conversely, if the slide amount of the slider 80 is increased, the wrap portion between the lock wall 55 and the arm portion 91 can be enlarged without changing the thickness of the arm portion 91.
[0046]
3, 5 and 6, the leg portion 54 is slightly smaller than the latch receiving mounting hole 43 of the cabinet body 40 and has a square shape around the leg portion 54. There are provided a plurality of elastic claws 57... That are opposed to each other and are reduced in diameter through the latch receiving attachment hole 43 and expanded by elasticity.
As shown in FIG. 6, each elastic claw 57 passes through the latch receiving attachment hole 43 and then expands its diameter by elasticity, so that the front and back surfaces around the latch receiving attachment hole 43 are between the flange 53. Hold it.
(how to use)
First, when the opened slide door 30 is closed, the taper surface 93 of the arm portion 91 comes into contact with the taper surface 56 of the lock wall 55, and the arm portion 91 is raised as shown by a two-dot chain line in FIG.
[0047]
Therefore, as shown in FIGS. 5 and 6, the arm portion 91 fits into the slide groove 51 from the open side surface of the slide groove 51 of the latch receiver 50.
As the arm portion 91 is raised, the cam hole 88 of the slider 80 is displaced via the pin 92 as shown in FIG.
For this reason, the slider 80 slides in the direction to open the slide door 30 as shown in FIGS.
[0048]
Therefore, the spring 100 is compressed between the slider 80 and the case 70 as shown in FIGS.
Therefore, when the arm portion 91 rises and fits in the slide groove 51 of the latch receiver 50, the arm portion 91 is finally lowered by the compression restoring force of the spring 100.
[0049]
That is, the slider 80 slides to open and close the sliding door 30 as shown in FIGS.
Therefore, when the cam hole 88 of the slider 80 is displaced, the pin 92 is lowered as shown in FIG. 7, and the arm portion 91 is lowered integrally with the pin 92.
When the arm portion 91 is lowered, as shown in FIGS. 5 and 6, the arm portion 91 comes into contact with the lock wall 55 so that the slide door 30 is not opened from the closed state and is locked in the closed state.
[0050]
Next, in order to open the closed slide door 30, the operation recess 83 of the slider 80 may be slid in the direction in which the slide door 30 is opened.
When the slider 80 is slid, the arm portion 91 rises and comes out of the open side surface of the slide groove 51 in the reverse procedure described above.
Thereby, the locked state of the slide door 30 is released, and the slide door 30 can be opened using the operation recess 83 of the slider 80 as a handle.
[0051]
On the other hand, if the slide door 30 locked in the closed state is forcibly opened, the arm portion 91 is linearly bent as shown in FIG. To get out of the slide groove 51.
For this reason, it is possible to prevent the arm portion 91, the pin 92, and the like from being damaged by releasing the locked state before an excessive force is applied to the arm portion 91, the pin 92, etc., which is particularly structurally weak.
[0052]
Similarly, when the opened slide door 30 is closed with force, the arm portion 91 is similarly kicked up by the lock wall 55 to bend linearly and get over the lock wall 55 to slide the slide groove 51. Get stuck inside.
When the momentum is further strong, the slide door 30 hits the door stop portion 42 and is bounced back to open.
[0053]
Also at this time, the arm portion 91 can be kicked up by the lock wall 55, bend linearly, and get out of the slide groove 51 so as to get over the lock wall 55, thereby preventing the lock device 10 from being damaged. it can.
[0054]
【The invention's effect】
Since this invention is comprised as mentioned above, there exists an effect as described below.
(Claim 1)
According to invention of Claim 1, there exist the following effects.
[0055]
That is, when the sliding door is opened and closed roughly, the locked state can be released and the lock device can be prevented from being damaged.
(Claim 2)
According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, the following effect is obtained.
[0056]
That is, the operability of the slider can be improved.
Specifically, by urging the slider in the lock direction, the operation of the slider in the lock direction can be omitted.
(Claim 3)
The invention described in claim 3 has the following effect in addition to the effect of the invention described in claim 1 or claim 2.
[0057]
That is, the operability of the slider can be improved in the same manner as the effect of the second aspect of the invention.
Specifically, when the slide door is closed, the locked state of the latch device is once released, and the operation of the slider when the slide door is closed can be reduced. In combination with the invention described in claim 2, the operation of the slider when closing the slide door can be omitted.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a locking device.
FIG. 2 is a perspective view of a cabinet.
FIG. 3 is a perspective view of the locking device.
FIG. 4 is an exploded perspective view of the latch device.
FIG. 5 is a front view of the locking device.
6 is a cross-sectional view taken along line VI-VI in FIG.
7 is a rear view of the latch device of FIG. 5. FIG.
FIG. 8 is a front view of the lock device corresponding to FIG. 5, showing the unlocked state of the lock device.
9 corresponds to FIG. 6 and is a cross-sectional view taken along line IX-IX in FIG.
10 corresponds to FIG. 7 and is a rear view of the latch device of FIG.
[Explanation of symbols]
10 Locking device 20 Cabinet
30 Sliding door 31 Latch mounting hole
40 Cabinet body 41 Opening
42 Door stop 43 Latch holder mounting hole
44 Cushion member 50 Latch holder
51 Slide groove 52 Body
53 Butt 54 Leg
55 Lock groove 56 Tapered surface
57 Elastic claw 60 Latch device
70 Case 80 Slider
81 Front plate 82 Back plate
83 Operation recess 84 Guide rib
85 Projection 86 Boss
87 tongue 88 cam groove
90 Lock arm 91 Arm
92 pin 93 taper surface
100 Spring 110 Storage recess
111 Notch 112 Guide groove
113 Step 114 Fixed claw
115 Movable claw 120
130 Bump 131 Spring receiving piece
132 Slider receiving piece 140 Guide piece
141 Guide hole

Claims (3)

A locking device that locks the sliding door attached to the opening of the cabinet so as to be slidable in the left-right direction in a closed state in which the opening of the cabinet is closed,
The locking device is a sliding door locking device including a latch receiver attached to a door stop portion of the cabinet, and a latch device locked to the latch receiver and attached to the sliding door.
The latch device slides in a vertical direction by sliding the slider in a sliding direction of the sliding door, and sliding the slider in a direction in which the sliding door opens, and moves from the locked position to the unlocked position during this sliding. And a lock arm that
The latch receiver receives the lock arm, and is positioned along the slide groove that allows the lock arm to slide in the vertical direction. In the lock position of the lock arm, the lock arm is A lock wall for preventing the slide groove from coming out,
The slide groove is opened with one side facing the opening of the cabinet,
The tip of the lock arm extends curvedly from the open surface of the slide groove toward the bottom of the slide groove, abuts against the lock wall at the lock position of the lock arm, and the lock arm is An arm that prevents the slide groove from slipping out and bends so as to get over the lock wall when an excessive force is applied to the lock arm in the opening direction of the slide door, and exits from the open surface of the slide groove. A sliding door locking device comprising a portion. The latch device includes urging means for urging the lock arm from the unlock position toward the lock position by urging the slider toward the closing direction of the slide door. The sliding door locking device according to claim 1. A taper surface is provided between the lock wall of the latch receiver and the arm portion of the lock arm to slide the lock arm from the lock position toward the lock release position. The sliding door locking device according to claim 1 or 2.

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