JP2008095444A - Sliding door latch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliding door latch device of simple structure remarkably thinning the whole device while turning a latch large to positively operate it only by slightly operating an operating knob. <P>SOLUTION: The sliding latch device comprises a thin-type case 2; the latch 3 turnably pivoted into the case with a pair of shaft parts 8, 8 forming a void space 8a at an intermediate part, and having a latch claw 9 projected from the side of the case; a leaf spring 10 energizing the latch in a locking direction; and an operating shaft 12 turnably pivoted into the case with an axis parallel with the shaft parts of the latch, and having an arm 14 extended orthogonally from the shaft and fitted into the void space 8a between both shaft parts of the latch so that the tip of the arm is engaged with the intermediate part between both shaft parts and the latch claw of the latch; and the operating knob 13 provided integrally with the operating shaft to release the latch. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sliding door latch device which is attached to an opening provided in front of a closed end portion of a sliding door and has a simple structure and can be thinned.

  When sliding doors used in cabinets, etc. are closed vigorously, the sliding doors are bounced back when they collide with the cabinet doors. In severe cases, the sliding doors on the opposite side should be opened by the impact. There is.

In order to prevent such problems, the conventional sliding door has a latch (locking plate) provided inside the end of the sliding door and is engaged with a locking claw provided at the door-to-door portion of the cabinet. Is provided with a latching device that allows the latch to be released from the latching claw and opened by pulling the handle on the front side of the sliding door. (See, for example, Patent Document 1).
JP-A-8-189242

  However, in the conventional structure as described above, since the latch protrudes greatly inward of the sliding door and engages with the locking claw provided on the cabinet side, the structure of the device itself is complicated, and As the size increases, the number of parts is large and the assembly is troublesome. In particular, the latch and the claw must be accurately aligned in the closed state because the engagement claw formed on the front end of the latch needs to be engaged with the latch claw on the cabinet side, and positioning work is required. It is troublesome.

  In view of the above-mentioned problems of the prior art, the present invention can rotate the latch greatly by operating the operation knob slightly and can be surely operated. An object of the present invention is to provide a sliding door latch device having a simple structure.

According to the present invention, the above problem is solved as follows.
(1) A thin case fitted into an opening provided at the end of a sliding door and a pair of shaft portions disposed on the same axis so as to form a void in the middle portion, And a latch in which the latch claw protrudes to the side of the case, and a biasing means for biasing the latch so that the latch claw is always biased in the locking direction. The arms that are spaced apart from the latch and are pivotally supported in the case with an axis that is parallel to the axis of the latch and that extend in a direction perpendicular to the axis are both axes of the latch. An operating shaft that is disposed across the space between the sections and that engages an intermediate portion of the latch between the two shaft portions and the latch claw of the latch; And protrudes outward from the case through a hole provided in the front surface of the case. That shall be provided with an operation knob of unlatching.

  (2) In the above item (1), the urging means comprises an elastic tongue-shaped leaf spring projecting on the side surface of the latch, and the leaf spring is mounted on one side of the case. The latch pawl is urged in the locking direction by being pressed against the surface.

  (3) In the above paragraph (1) or (2), a back panel is provided on the back surface of the front panel constituting the sliding door, spaced apart by the thickness of the case, and the back panel is slightly larger than the outer shape of the case. An elastic locking claw provided with an opening, abutting the front ends of a pair of mounting plates projecting on one side of the case with the front surface of the back panel and projecting on the other side of the case, The case is held between both panels by elastically engaging the front side of the opening edge of the back panel.

  (4) In the above item (3), the elastic locking claw is provided so as to extend obliquely outward from the side surface of the case in parallel with the rear panel, and on the outer surface of the elastic locking claw, An inclined surface inclined with respect to two directions of an extending direction extending from the side surface and a fitting direction fitting with the opening of the rear panel, and a locking step portion formed so as to be substantially continuous with the inclined surface; The locking stepped portion is locked to the edge of the opening of the back panel.

  (5) In the above item (3) or (4), a stopper portion that protrudes forward and contacts the back surface of the front panel when the case is mounted is provided at the tip of the mounting plate and the base of the elastic locking claw.

According to the first aspect of the present invention, since the tip of the arm extending from the operation shaft is engaged with the intermediate portion between both shaft portions and the latch claw in the latch, the operation knob is only slightly operated. Therefore, the latch can be pivoted and operated reliably, and the arm of the operating shaft is located in the space between the two shafts of the latch and fits within the plate thickness of the latch. Can be remarkably thinned, and the structure is simple, the number of parts is small, and it can be easily manufactured.
In addition, since the operation knob and the latch are separated, when the sliding door is closed, the rotation of the latch in the unlocking direction immediately before the latch engages with the latch hole on the door stop side is transmitted to the operation knob. The operation knob does not rotate with the latch as in the case where the operation knob and the latch are integrated, and the operability is good.

  According to the second aspect of the present invention, since the biasing means can be formed integrally with the latch, the number of parts can be further reduced.

  According to invention of Claim 3, the assembly | attachment with respect to a sliding door can be performed by one-touch.

  According to invention of Claim 4, even if the space of the front panel and back panel of a sliding door is narrow, an apparatus can be attached reliably.

  According to the fifth aspect of the present invention, the case can be securely and firmly held by sandwiching the case between the front panel and the rear panel of the sliding door in the mounted state of the apparatus.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 to 4, the latch device 1 includes a rectangular case 2 made of a synthetic resin molded body, a latch 3 protruding from one longitudinal side of the case 2, and a latch 3. It consists of only three parts with the operation part 4 connected.

  The case 2 has a rectangular shape with a bottom opening and a flat and thin shape. A pair of left and right mounting plates 5 project from one side in the longitudinal direction, and a mounting base 6 projects from the center of the other side. The left and right sides of the mounting base 6 are provided with a pair of left and right elastic locking claws 7 extending obliquely outward with respect to the longitudinal direction of the side surface of the case 2.

  The latch 3 is separated from each other so as to form a space 8a in the middle portion, and is supported by a pair of left and right shaft portions 8, 8 that are pivotally supported in the case 2, and both shaft portions 8, 8. A latch claw 9 that is integrated and protrudes outwardly on one side in the longitudinal direction of the case 2, and is curved outward in the longitudinal direction of the case 2 and upward from a connecting portion between the latch claw 9 and the shaft portion 8. And a leaf spring 10 serving as an urging means.

  The operation member 4 is separated from the latch 3 and is parallel to the shaft portions 8 and 8 of the latch 3, and both end portions are fitted into shaft holes 11 formed in the center of both end portions in the longitudinal direction of the case 2. An operation shaft 12 that is pivotally supported, an operation knob 13 that also serves as a handle protruding from the upper periphery of the operation shaft 12, and an arm that is integrally provided on one side of the outer periphery of the operation shaft 12 and interlocks with the latch 3. 14. The operation knob 13 protrudes from the upper surface of the case 2 through a laterally long hole 15 provided at the center of the upper surface of the case 2.

  The arm 14 is fitted into a space 8a between the shafts 8 and 8 of the latch 3, and the connecting shaft 16 formed integrally with the tip of the arm 14 is connected to the latch 3 as shown in FIG. It is fitted in a concave groove 9a formed on the lower surface. A stopper 17 is provided on the other side of the outer periphery of the operation shaft 12 so as to contact the inner surface of the case 2 and restrict the rotation of the operation shaft 12 and the latch claw 10.

  The mounting plate 5 includes a spring receiving portion 5a that receives the leaf spring 10 of the latch 3 on the lower surface side, and a fulcrum portion 5b that projects from the lower end of the spring receiving portion 5a in a bowl-shaped cross section, and is an upper portion of the fulcrum portion 5b. On the side and the upper part of the mounting base portion 6, stopper portions 5 c and 6 a that abut on the back surface of the sliding door described later are projected.

  As shown in an enlarged view in FIG. 4, the elastic locking claw 7 is spaced apart from the end of the mounting base 6 by a predetermined distance d with respect to the side surface of the case 2 and extends obliquely outward. The elastic bending allowance according to this distance d is given.

  The outer surface of the elastic locking claw 7 is inclined so as to gradually move away from the side surface of the case 2 as it is separated from the joint portion with the mounting base 6 in the longitudinal direction of the case 2. The outer side surface of the elastic locking claw 7 is inclined so as to gradually move away from the side surface of the case 2 as it goes upward from the lower edge shown in FIG. 4 is inclined downward, that is, the fitting direction (downward in FIG. 4) for fitting the case 2 to the opening of the panel to be attached and the extending direction of the outer surface of the elastic locking claw 7 An inclined surface 7a inclined in two directions, and a triangular locking step portion 7b having a wedge shape in plan view provided at the middle portion of the outer surface of the elastic locking claw 7 so as to be substantially continuous with the inclined surface 7a. The contact length of the inclined surface 7a with the opening edge of the panel, which will be described later, is a length corresponding to the bottom side of the triangular locking step portion 7b, so that the engagement allowance and the fitting depth are small. Even so, a sufficient contact length can be obtained.

  Further, the closer to the tip of the elastic locking claw 7, the larger the meshing margin, so that the amount of elastic deformation of the elastic locking claw 7 at the time of attachment can be reduced (the base of the elastic locking claw 7 is greatly elasticized). It is not necessary to be deformed), and insertion into the opening is facilitated, and after the elastic locking claw 7 is locked to the opening edge of the back panel 22, the elastic locking claw 7 is opened to the opening edge of the back panel 22. It becomes difficult to come off from the part.

  FIG. 5 shows the mounting location of the above latch device 1 with respect to the sliding door. In FIG. 5, the sliding door 20 includes a front panel 21 and a back panel 22 integrated by spot welding or the like so as to be separated from the back of the front panel 21 by the thickness of the case 2. A vertically long rectangular opening 23 substantially equal to the outer shape of the case 2 is formed at the mounting position of the panel 21, and a folded piece 23 a facing inward is formed at the inner edge of the opening 23.

  On the other hand, the opening 24 provided in the back panel 22 is formed to be slightly wider than the distance between both side surfaces of the case 2, and at the center on the side edge side, the latch claw 9 is continuous with the opening 24. A trapezoidal latch claw receiving notch 24a corresponding to the shape is formed.

  Next, a procedure for attaching the latch device 1 to the sliding door 20 will be described with reference to FIG. First, as shown in FIG. 6A, the case 2 is rotated in the direction of the arrow with the fulcrum part 5b as a base point in a state where the fulcrum part 5b is positioned at the inner edge of the opening 24 of the panel 22.

  6 (b), the inclined surface 7a of the elastic locking claw 7 is brought into sliding contact with the other end side edge of the opening 24, thereby elastically bending and reducing the distance d. At the final stage, as shown in FIG. 6 (c), the locking step 7b is elastically engaged with the edge of the opening 24, whereby the elastic locking claw 7 is elastically restored and the assembly is completed. To do.

  In the assembled state, the front peripheral edge of the case 2 is located inside the folded piece 23a of the front panel 21. In this state, the front ends of the stopper portions 5c and 6a facing the front are on both sides of the case 2 By abutting against the inner surface of the case 21, the case 22 is firmly held in a state of being narrowed between the panels 21 and 22.

  FIG. 7 shows a state in which the latch device 1 in the assembled state is viewed from the front panel 21 side of the sliding door 20, the outer periphery of the case 2 is located inside the opening 23, and only the operation knob 13 is the case 2. Since it only protrudes to the front, the appearance is extremely simple.

  FIG. 8 shows the configuration of the sliding door 20 provided with the above latch device 1 and the door-to-door portion of the cabinet, and the door-holding portion of the cabinet 30 has a predetermined gap inside the exterior panel 31 constituting the side plate. The inner panel 32 is integrally fixed by welding, and rails 33 for slidably supporting the sliding door 20 are provided at the upper and lower portions of the opening of the cabinet 30 that is opened and closed by the sliding door 20.

  A recessed portion 32a is provided in the door contact portion of the inner panel 32, and a side end portion of the sliding door 20 is drawn into the recessed portion 32a. The recessed portion 32a faces the latch claw 9 when the door is closed. A latch hole 32b is provided on the surface.

  As shown in FIG. 8 (a), when the sliding door 20 in the opened state is vigorously moved in the closing direction indicated by the arrow, the latch claw 9 inside the front end of the sliding door 20 slides on the corner of the recess 32a. In contact with each other, the shaft 8 is pivoted in the unlocking direction, which is the clockwise direction in FIGS. 8A and 8B, against the urging force of the leaf spring 10, and the sliding door 20 is recessed. Collides with the back of 32a.

  By the reaction of the collision, the sliding door 20 tries to return to the door opening direction. By this stage, the latch claw 9 is fitted into the latch hole 32b as shown in FIG. Since it is rotated to the locking position and engaged with the edge of the latch hole 32b, the sliding door 20 is restrained to the closed position, and the sliding door 20 is prevented from bouncing back.

  In order to open the sliding door 20 in the closed state, as shown in FIG. 8C, the operation knob 13 is pulled by hand in a direction to open the sliding door 20. Then, the latch claw 9 is rotated in the unlocking direction against the urging force of the leaf spring 10 as shown by the imaginary line in FIG. 20 is released, and thereafter the sliding door 20 can be opened to a desired position with the operation knob 13 as a handle.

  As is apparent from the above, in this embodiment, the operation shaft 12 is separated from the latch 3 and is parallel to the shaft portions 8 and 8 of the latch 3 so as to be rotatable in the case 2. The tip of the arm 14 extending from the operation shaft 12 is engaged with the intermediate portion of the latch 3 between the shaft portions 8, 8 and the latch claw 9, so that the operation knob 13 is slightly By simply operating, the latch 3 can be pivoted and actuated reliably, and the arm 14 of the operating shaft 12 is located in the space 8a between the two shaft portions 8, 8 in the latch 3, Since it falls within the plate thickness of the latch 3, the entire device can be remarkably thinned, and the structure is simple, the number of parts is small, and the device can be easily manufactured.

It is a disassembled perspective view of the latch apparatus which is an example of the thin article in this invention. It is the perspective view which looked at the assembly state of the latch device from the front side. It is the perspective view which looked at the assembly state of the latch device from the back side. It is an expansion perspective view of the IV section in FIG. It is the perspective view which looked at the relationship between the latch device and a sliding door from the back side. (a)-(c) is a cross-sectional explanatory drawing which shows the assembly | attachment procedure with respect to the sliding door of a latch apparatus. It is the perspective view which looked at the assembly completion state of the latch device from the front side. (a)-(c) is a cross-sectional explanatory drawing which shows the opening-and-closing state of the sliding door with respect to a cabinet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Latch apparatus 2 Case 3 Latch 4 Operation part 5 Mounting plate 5a Spring support 5b Support part 5c Stopper part 6c Stopper part 6a Stopper part 7 Elastic locking claw 7a Inclined surface 7b Locking step part 8 Shaft part 8a Space 9 Latch claw 9a recessed groove 10 leaf spring (biasing means)
DESCRIPTION OF SYMBOLS 11 Shaft hole 12 Operation shaft 13 Operation knob 14 Arm 15 Long hole 16 Connecting shaft 17 Stopper 20 Sliding door 21 Front panel 22 Rear panel 23 Opening 23a Folding piece 24 Opening 24a Notch for receiving latch piece 30 Cabinet 31 Exterior panel 32 Inner panel 32a Recess 32b Latch hole 33 Rail

Claims (5)

  A thin case fitted into the opening provided at the end of the sliding door, and a pair of shafts arranged on the same axis so as to form a void in the middle, and rotated in the case A latch that is pivotally supported and has a latch claw protruding to the side of the case, a biasing means that biases the latch so that the latch claw is always biased in the locking direction, and the latch An arm that is pivotally supported in the case and extends in a direction orthogonal to the shaft, with an axis that is spaced apart from the shaft and parallel to the shaft portion of the latch. An operating shaft that is disposed across the void and has an end of the arm that engages with an intermediate portion between both shaft portions of the latch and the latch claw, and is provided integrally with the operating shaft. And a protrusion protruding outward from the case through a hole provided in the front surface of the case. Sliding door latch apparatus, comprising an operation knob for switch release.   The urging means is composed of an elastic tongue-shaped leaf spring projecting on the side surface of the latch, and this latch spring is pressed against the plate surface of the mounting plate projecting on one side of the case, thereby 2. The sliding door latch device according to claim 1, wherein the sliding door latch device is biased in a locking direction.   A back panel is provided on the back of the front panel constituting the sliding door so as to be spaced apart by the thickness of the case, and the back panel is provided with an opening slightly larger than the outer shape of the case, and protrudes from one side of the case. A pair of mounting plate tips are in contact with the front surface of the rear panel, and elastic locking claws protruding from the other side of the case are elastically engaged with the front surface of the opening edge of the rear panel. The sliding door latch device according to claim 1 or 2, wherein the case is held between the panels.   The elastic locking claw is provided so as to extend obliquely outward from the side surface of the case in parallel with the back panel, and on the outer surface of the elastic locking claw, an extending direction extending from the side surface of the case, The locking step portion includes an inclined surface inclined with respect to two directions of the fitting direction to be fitted to the opening of the rear panel, and a locking step portion formed so as to be substantially continuous with the inclined surface. 4. The sliding door latch device according to claim 3, wherein the door is locked to an edge of the opening of the rear panel.   5. The sliding door latch device according to claim 3, wherein a stopper portion that protrudes forward and comes into contact with the back surface of the front panel when the case is attached is provided at the tip of the mounting plate and the base of the elastic locking claw.

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