JP6238337B2 - Sliding door latch device - Google Patents

Description

    The present invention relates to a sliding door latch device, and more particularly, a latch that is fitted in a fitting hole formed in a vertical shaft of a sliding door (shoji) that moves left and right in a window frame, The present invention relates to a sliding door latch device that rotates horizontally around and engages / disengages with an engaging portion of a lock disposed on a surface of a vertical frame of a window frame.

    Patent Document 1 states that “the sliding door latch device (4) of the sliding door cabinet (1) is provided on the sliding door (3) moving in the left-right direction so as to be rotatable about the vertical axis (9). Thus, the sliding door is constrained to be closed to the cabinet body, and the latch (7) is engaged with a locking claw (6) that is locked to a locking hole (6) provided in the cabinet body (2) at the tip. 10) having a latch piece (11) facing in the left-right direction and a handle piece (12) projecting forward from the sliding door (3) in the front-rear direction, and the latch claw (10) "Matters in which the locking claw (10) is rotationally biased so as to be locked in the locking hole (6) by the elastic body (13)" are described.

    Further, in FIGS. 2 and 3 of Patent Document 2, a pair of nail plate portions 6 and 6 are provided on the side wall of the main body case 3 having the front end flange portion 4 of the handle device via a plurality of slits. 3 is inserted into the mounting hole of the opening / closing member 1 while leaving the front end flange portion 4, and when the main body case 3 is inserted into the mounting hole of the opening / closing member 1, the pair of claw plate portions 6, 6 It is described that it is elastically displaced toward the internal space side of the case 3 and attached to the opening / closing member (reference numerals are those of each patent document).

    However, these patent documents do not describe the problem or new configuration of the present invention. In addition, the opening / closing member 1 described in Patent Document 2 is not a sliding door but a door that rotates in a horizontal direction, referring to paragraph 0012.

JP 11-172882 A Japanese Patent No. 4942829

    The main object of the present invention is to prevent the sliding door latch device from coming out of the fitting hole of the door end even if the case of the sliding door latch device is inserted into the fitting hole of the door tip, as long as the elastic engagement claw piece is not damaged. . Next, an object of the present invention is that once the lock piece is provided in the internal space of the case, the elastic engagement claw piece can be easily and reliably locked. Another object of the present invention is that the lock piece does not interfere with the operation of the handle operating piece, and can be applied to the lock of the sash type window frame by rotating horizontally around the vertical axis.

The sliding door latch device of the present invention is fitted in a fitting hole in a sliding door that opens and closes in the left-right direction, and has a flange portion at the front end portion of the side wall and an elastic claw plate portion at the side wall, and a case perpendicular to the case. A latch rotatably supported through a shaft and having a latching claw at the distal end portion thereof, and provided integrally with the base end portion of the latch or integrally formed with the latch, and positioned in the internal space of the case In addition, when the operating force is released and the position of the spring member is released, the spring force of the spring member is released when the operating force is released. A sliding door latch device comprising a pulling operation piece that returns while rotating backward in the direction of restraining the sliding door, and when the case is fitted into the door, the claw of the elastic claw plate portion is an edge of the fitting hole It is sliding contact with the part The elastic claw plate portion is elastically displaced toward the inner space, and when the claw passes through the edge portion, the elastic claw plate portion is restored, and a lock piece for locking the return state of the elastic claw plate portion is provided. It is provided in the case.

    In the above configuration, the lock piece is a strip-shaped vertical bar, and when the lock piece is incorporated in the internal space along the handle operating piece, both end faces thereof are opposed to each other in the vertical position. It contacts each inner surface of the elastic nail | claw plate part to perform, It is characterized by the above-mentioned. The lock piece has an engagement claw piece on its side wall, and when the engagement claw piece is incorporated in the internal space of the case, the lock piece is engaged with an engaged portion formed on the vertical side wall on the side where the sliding door of the case is closed. It is characterized by combining. Further, the surface of the pull operation piece is formed in a step shape, and when the lock piece is incorporated in the internal space of the case, a finger can be inserted between the step portion of the pull operation piece and the opposite side wall of the lock piece. A gap is present. In addition, the case is fitted into a fitting hole formed in a sash type vertical wall of the sliding door that moves left and right within the window frame, and the latch having a locking claw rotates horizontally around the vertical axis. It is characterized in that it is engaged with and disengaged from the engaging portion of the lock arranged on the surface of the vertical frame forming the sash type window frame.

(A) According to the first aspect of the present invention, the case of the sliding door latch device can be easily fitted into the fitting hole of the door tip in a one-touch manner. Since the lock piece is provided in the internal space of the case after the sliding door latch device is attached to the door tip, the sliding door latch device does not come out from the fitting hole of the door tip unless the elastic engagement claw piece is damaged.
(B) In the invention described in claim 2, the lock piece is a single vertical bar, and the lock piece is incorporated in the internal space along the pulling operation piece, and both end faces thereof are opposed to each other in the vertical position. Since each of the elastic claw plate portions comes into contact with each inner surface, the pair of elastic engagement claw pieces can be easily and reliably locked.
(C) In the invention according to claim 3, since the engaging claw piece of the lock piece engages with the engaged portion formed on the vertical side wall of the case, the lock piece is locked once fitted into the internal space of the case. The piece does not come off easily from the case.
(D) In the invention described in claim 4, there is a gap where a finger can be inserted between the stepped portion of the pull operation piece and the opposite side wall of the lock piece. Don't get in the way.
(E) The invention described in claim 5 can be applied to the lock of the sash type window frame by horizontally rotating around the vertical axis.

1 to 20 are explanatory views showing a first embodiment of the present invention. FIG.21 and FIG.22 is each explanatory drawing which shows 2nd Embodiment of the lock piece which comprises this invention.
BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing from the front view of the sliding door latch apparatus integrated in the vertical fence of the door of the sliding door (a part is omitted). Schematic explanatory view from the plan view of the sliding door latch device (left side of the drawing) incorporated in the vertical shaft of the sliding door and the lock holder (right side of the drawing) fixed to the surface inside the vertical frame of the sash type window frame (locked state) ). FIG. 3 is a schematic explanatory diagram of a state in which the pulling operation piece is pulled forward about the vertical axis in FIG. 2 and the engaging claw of the latch is unlocked from the engaging hole of the position adjusting plate of the lock (right side in the drawing). The perspective view from the front view (tip end part) side of the principal part. The perspective view from the back view (rear end part) side of the principal part. Explanatory drawing which shows the structure of the upper end part of a case. The perspective view from the front view of a case. The top view of a case. The front view of a case. FIG. 10 is a sectional view taken along line 10-10 in FIG. 9; FIG. 11 is a sectional view taken along line 11-11 in FIG. 9; FIG. 12 is a sectional view taken along line 12-12 in FIG. 9; FIG. 13 is a sectional view taken along line 13-13 in FIG. 9; The exploded perspective view of the principal part. The perspective view from the right side view of a lock piece. Explanatory drawing of the engagement claw piece of a lock piece. Explanatory drawing of the end surface of a lock piece. (A) is a schematic explanatory drawing before the nail | claw of an elastic nail | claw board part passes the edge part of the fitting hole of a vertical hook. (B) is a schematic explanatory drawing after the nail | claw of an elastic nail | claw board part passes the edge part of the fitting hole of a vertical hook. (A) is an explanatory view of a state in which the operating force by the finger is released and the operating force by the finger is released, and the pulling operation piece is returned to the direction of restraining the sliding door by the spring force of the spring member. FIG. 4 is an explanatory view showing a state in which the lock piece storage space in the internal space is opened while rotating in the sliding door opening direction against the spring force of the spring member, and (c) is locked in the lock piece storage space. Explanatory drawing which showed the state when picking and inserting a piece. FIG. 19B is an explanatory diagram of a state where the lock piece is completely inserted into the lock piece storage space of the case and the engaging claw piece of the lock piece is engaged with the engaged portion of the case in the state of FIG.

    1 to 20 are explanatory views showing a first embodiment of the present invention. First, the entire environment including the “sliding door latch device X” of the present invention will be described with reference to FIGS. 1 to 3.

(1) Environment and Basic Configuration 1 is a sash-type window frame (partially omitted) of a joinery. As is well known, the window frame 1 is formed in a rectangular shape with a vertical frame 1a and a horizontal frame. Reference numeral 2 denotes a sliding door (for example, a glass shoji) fitted in the window frame 1, and this sliding door 2 slides in and out in the left-right direction indicated by the arrow in FIG.
X is a vertical sliding door latch device X fitted in a fitting hole (attachment hole) 3 formed in the vertical direction in the vertical rod 2a of the door end of the sliding door 2 in an embedded state. The sliding door latch device X is fitted into the fitting hole 3 at the door end of the sliding door 2 that slides open and close in the left-right direction, and is formed through a flange portion 28 at the side wall, which will be described later, and slits 33 and 38 on the side wall. A case 21 having at least a pair of elastic claw plate portions 39, a latch 23 rotatably supported on a rear end portion of the case 21 via a vertical shaft 22 and having a locking claw 23b at a front end portion; The latch 23 is integrally formed with the base end portion 23 a or is integrally formed with the latch 23, is located on the distal end side of the internal space 24 of the case 21, and is within the left and right range of the internal space 24. When the operating force is released, the position of the sliding member 2 is displaced in the opening direction against the spring force of the spring member 25 wound around the vertical shaft 22, and when the operating force is released, the spring force of the spring member 25 Pull 2 and a pull tab operation lever 26 to return in the direction to restrain.

    On the other hand, referring to FIG. 2 and FIG. 3, reference numeral 4 denotes a lock fixed to a surface (inner surface) 5 in a U-shaped frame in a plan view of the building frame 1 a of the window frame 1, The inner surface 5 is fixed to the fixing plate portion 7a with the fixing member 6 through the fixing member 6 in a plan view L-shaped fixing plate 7 and extends from the one end portion of the fixing plate portion 7a by a predetermined amount in the opening direction of the sliding door. End plate portion 7b, a position adjusting plate 8 superposed on the surface (inner surface) of the end plate portion 7b, an inclined elongated hole 9 formed in the center of the position adjusting plate 8, and the end plate portion The first fixing means 11 for positioning inserted into the vertical elongated hole 10 formed in the central portion of 7b in a penetrating state.

The positioning first fixing means 11 includes a bolt 11a and a nut 11b, and the position adjusting plate 8 can be moved in the left-right direction depending on the vertical position of the vertical elongated hole 10 of the positioning first fixing means 11. position can be adjusted steplessly.

    By the way, a locking hole 12 is formed in the left end portion of the position adjusting plate 8 in the vertical direction. As shown in FIG. 2, when the sliding door 2 is closed, a finger is moved from the pulling operation piece 26 of the sliding door latch device X. When released, the pulling operation piece 26 returns to the direction in which the sliding door 2 is restrained by the spring force of the spring member 25, so that the latch 23 automatically rotates around the vertical axis 22 in the counterclockwise direction. The latching claw 23 b of the latch 23 is engaged with the latching hole 12 of the position adjusting plate 8. On the other hand, as shown in FIG. 3, when the sliding door 2 is opened, it is operated to pull the sliding door while putting a finger on the pulling operation piece 26, so that the pulling operation piece 26 resists the spring force of the spring member 25. As a result, the handle operating piece 26 is displaced by a predetermined amount in the opening direction of the sliding door 2 and the locking claw 23b of the latch 23 is locked by the position adjusting plate 8. Exit from hole 12.

    As described above, the sliding door latch device X according to the embodiment has the sliding door (for example, shoji) 2 provided on the sliding door type cabinet or the sash type window frame 1 so as to be slidable in the left-right direction. When the sliding door 2 in a closed state is constrained to, for example, the lock 4 of the window frame 1 (FIG. 2) or is opened by the latch 23 as a locking piece rotatably provided around the shaft, the latch 23 is opened. The pulling operation piece 26 provided integrally with the latch 23 or integrally formed with the latch 23 is released together with, for example, a pulling operation when the sliding door 2 is opened (FIG. 3).

(2) Specific Configuration First, the case 21 constituting the sliding door latch device X will be described. Referring to the front view side perspective view of FIG. 4 and the rear view side perspective view of FIG. 5, the case 21 is in the form of a vertically long block. Here, the configuration of the vertically long case 21 will be described with reference to FIG.
Reference numeral 28 denotes a stepped flange portion provided in a vertically long rectangular shape at the tip. The flange portion 28 has a substantially central portion of the upper flange portion and the lower flange portion formed in a stepped shape in the front-rear direction. When the upper and lower central step portions 29, 29 are used as a reference, the right U-shaped flange portion 28a is It is lower than the left inverted U-shaped flange portion 28b. In other words, the left flange portion 28b protrudes to the near side of the right flange portion 28a.

    Reference numeral 30 denotes a vertically long plate-like right side wall that extends perpendicularly to the right flange portion and extends to the rear end. An approximately U-shaped notch 31 that extends to the rear end is formed at the substantially central portion of the right side wall 30. From the notch 31, a protruding tip of the latch 35 appears. Reference numeral 32 denotes an engaged portion such as a pair of upper and lower grooves and holes formed in a portion near the upper end portion and a portion near the lower end portion of the right side wall, and is a square engagement hole in the embodiment. These engaged portions 32 engage with engaging claws of a vertical bar-shaped lock piece which will be described later.

Reference numeral 33 denotes a pair of upper and lower slits formed symmetrically at the upper center portion and the lower end center portion of the right side wall. These slits 33 are for forming upper and lower elastic claw plate portions 39 to be described later.
On the other hand, 35 is a left side wall which extends to the rear end perpendicular to the left flange portion, and a midway portion thereof forms a step 36 inside.

    Reference numeral 37 denotes an upper wall extending to the rear end perpendicular to the stepped upper flange portion. The upper wall 37 includes an upper wall composed of a plurality of long and short slits continuous to the right side wall slit described above. An elastic claw plate portion 39 is provided through the slit 38. At the ends of these elastic claw plate portions 39, there are provided a plurality of claws 39a facing the inner surfaces of the upper and lower flange portions with a slight gap. Each claw 39a is formed with an unnumbered inclined surface that is in sliding contact with the edge portion of the fitting hole 3 of the vertical rod 1a.

    The upper wall slit 38 is, for example, a first slit 38a formed in the left-right direction along the upper flange portion, and a long left side wall formed in the front-rear direction so as to be connected to one end of the first slit 38a. The second slit 38b, the short third slit 38c on the right side wall formed in the front-rear direction so as to be connected to the other end of the first slit 38a, and the short third slit 38c and the right side wall slit 33 are connected. It consists of a short fourth slit 38d (see FIG. 6).

Reference numeral 41 denotes a lower wall that extends to the rear end perpendicular to the step-shaped lower flange portion. The lower wall 41 is also formed of a plurality of long and short slits that are continuous with the right side wall slit 33 described above. An elastic claw plate portion having a plurality of claws is provided through the wall slit. Since the lower wall slit and the lower elastic claw plate portion have the same configuration as the upper wall slit and the like, the overlapping description is omitted.
As shown in FIG. 4, the vertically long block-shaped case 21 has an internal space 24 with a vertically long rectangular opening on the tip side thereof, and is substantially accommodated in the internal space 24, and left and right of the internal space 24. (Long range that can be rotated in the left and right direction when the lock piece is incorporated), a vertically long sliding door operating piece 26 that rotates around the vertical axis 22 and a strip-like one that is a main part of the present invention described later. The lock piece 51 is incorporated. In FIG. 4, the bar-shaped lock piece 51 is before being fitted into the case 21 and is indicated by an imaginary line.

    Next, a pair of upper and lower elastic claw plate portions 39 formed on the upper wall 37 and the lower wall 41 of the case 21 will be described. Although the elastic claw plate portion 39 is hard, it has a function of elastic displacement and elastic return by its material itself. In the embodiment, since the upper wall 37 and the lower wall 41 are formed through slits, the elastic plate body is partitioned and has two inclined claws 39a in total in the left-right direction at the end. Further, in the vicinity of the short third slit 38c on the right side wall side to the right side wall slit 33 on the inner surface of the elastic claw plate portion 39, a small protrusion that fits with a front and rear streak fitting groove formed on the end face of the lock piece 51. A strip 39b is formed (see FIG. 7).

    FIG. 5 is a perspective view of the main part from the rear view (rear end part) side. Referring to this rear view (rear end portion), the rear end portion of the case 21 formed in a vertically long block shape with the left and right / upper and lower side walls 35, 30, 37, 41 and the flange portion 28 is described above at the center portion. There is a central space 43 that communicates with the cutout 31 on the left side wall, and this central space 43 communicates with the internal space 24 for the handle operating piece 26 on the tip end side of the case. The upper and lower horizontal bearing plates 44 and 44 forming the central space 43 are formed with unnumbered shaft holes, and the vertical shaft 22 is installed on the horizontal bearing plate 44 through the opposed shaft holes.

    Further, the structure of the rear end portion of the case 21 will be described with reference to the central space 43. The box-shaped leg portion a of the rear end opening 45 including the upper horizontal bearing plate 44 and the rear end including the lower horizontal bearing plate 44. The box-shaped leg b of the opening 46 is formed vertically symmetrical.

    Thus, the box-shaped leg portion a having the upper rear end opening 45 has a narrow horizontal opening 48 communicating with the upper horizontal notch 47 shown in the front view of the case 21 and a partition facing the right side wall. A narrow vertical opening 50 is formed by the plate 49 and communicates with the internal space 24 for the pulling operation piece 26 and the engaged portion 32 for the lock piece 51. In addition, since the structure of the box-shaped leg part b which has the lower rear end opening 46 is also the same, the overlapping description is omitted.

    FIG. 9 is a front view of the vertically long block-shaped case 21. As is clear from each cross-sectional view with reference to FIG. 9, the internal space 24 for the handle operating piece 26 has an upper step-like connecting plate 51 and a lower step-like connecting portion with the above-described central space 43 as a hook. It is the front end portion side of the case divided by the plate 52. The upper step-like connecting plate 51 and the lower step-like connecting plate 52 have the same shape, and these step-like connecting plates 51, 52 completely insert the belt-like or vertical bar-like lock piece 51 into the case 21. The right side of the internal space 24 is deeper toward the back (the rear end side) along the right side of the pull operation piece 26 so as to be able to do so.

    FIG. 14 is an exploded perspective view of the main part. In FIG. 14, a pulling operation piece 26 having a function of a lock lever in front of the case 21, and a vertical bar-shaped locking piece 51 having a function of receiving the stepped side surface of the pulling operation piece 26 on its opposite side surface. The metal latch 23, the coil spring as an example of the spring member 25, the vertical shaft 22, and the E-ring 22a are drawn.

Accordingly, the metal latch 23 and the synthetic resin pulling operation piece 26 are integrally provided. That is, the rear end portion of the case 21 is rotatably supported via the vertical shaft 22 and is positioned on the front end portion side of the internal space 24 of the case 21 and the latch 23 having the engaging claw 23b at the front end portion. Within the left and right range of the internal space 24, the position of the spring member 25 is displaced while rotating in the opening direction of the sliding door 2 against the spring force of the spring member 25 by the operation force of the finger, and the spring member 25 is released when the operation force is released. Although the material is different from that of the pulling operation piece 26 that returns while rotating backward in the direction of restraining the sliding door 2 by the spring force, it is provided integrally. Of course, depending on the embodiment, the latch 23 and the handle operating piece 26 provided integrally with the arm portion 26b at the base end portion 23a of the latch 23 may be integrally formed as a synthetic resin molded product.

    In the embodiment, the handle operating piece 26 that is substantially housed in the vertical direction in the internal space 24 includes a finger-hanging portion 26a on the front side, and a back side of the central portion of the finger-hanging portion 26a into the central space 43 of the case 21. A pair of upper and lower arm portions 26b are provided, and a base end portion 23a of a latch 23 is integrally provided on the arm portion 26b.

As described above, the reason why the structure of the vertically long block-like case 21 is complicated is that, in the present invention, when the case 21 is fitted into the fitting hole 3 of the door end of the sliding door (for example, the vertical rod 1a), the case 21 on one of the elastic nail plate portion 39 by the pawl 39a is in sliding contact with the edge portion of the fitting hole 3 of the opposed side walls to form the pair of elastic pawls plate portion 39 is elastically displaced in the inner space 24 side, the pawl 39a Passes through the edge portion, the elastic claw plate portion 39 is restored, and in order to lock the restored state of the elastic claw plate portion 39, the inner wall surface of the elastic claw plate portion 39 preferably has both end faces. This is because one band-like lock piece 51 that comes into contact is incorporated into the internal space 24.

    Therefore, with reference to FIGS. 15 to 17, the configuration of the lock piece 51 formed of a synthetic resin material in a band shape will be described. 15 is a perspective view of the lock piece 51 from the right side, FIG. 16 is an explanatory view of the engaging claw piece 52 of the lock piece 51, and FIG. 17 is an explanatory view of the end face of the lock piece 51. As is apparent from these drawings, a pair of upper and lower engaging claw pieces 52 are formed to protrude rearward on the rear end face of one side face 51a of the single belt-like lock piece 51. Similar to the elastic claw plate portion 39, these engaging claw pieces 52 have a function of elastic displacement and elastic return by the material itself while being hard.

    The sliding door latch device X having the above configuration is fitted in the embedded state with the flange portion 28 remaining in the vertical fitting hole 3 of the vertical rod 1a at the door end. At that time, the elastic claw plate portion 39 formed on the side wall of the case 21 is elastically displaced and elastically restored and attached to the vertical rod 1a of the door. 18A is a schematic explanatory diagram before the claw 39a of the elastic claw plate portion 39 passes through the edge portion of the fitting hole 3 of the vertical hook 1a, while FIG. 18B shows the elastic claw plate portion 39. It is a schematic explanatory drawing after the nail | claw 39a passes the edge part of the fitting hole 3 of the vertical hook 1a. However, even if the claw 39a of the elastic claw plate portion 39 is engaged with the edge portion of the fitting hole 3, after the attachment, if the sliding door latch device X is pulled strongly toward the front, the claw 39a is displaced or damaged. The sliding door latch device X may come off from the door. Therefore, the lock piece 51 is incorporated next to the pulling operation piece of the case 21 so that the sliding door latch device X is not easily detached from the door tip.

FIG. 19A is an explanatory view showing a state in which the pulling operation piece 26 is released in a direction in which the operation force by the finger is released and the sliding member is restrained by the spring force of the spring member, while FIG. The pulling operation piece 26 is displaced by the operation force of the finger while rotating in the opening direction of the sliding door 2 against the spring force of the spring member 25, and the lock piece storage space of the internal space 24 is opened. FIG. 19C is an explanatory diagram showing a state when the lock piece 51 is picked and inserted into the lock piece storage space. As shown in FIG. 20, when the lock piece 51 is completely inserted into the space on the right side of the handle operating piece 26 located in the internal space 24 of the case 21, the pair of upper and lower engaging claw pieces 52 are engaged with the case 21. Engage with the joint 32. At this time, for example, the streak-like fitting grooves 53 formed on the upper and lower end faces of the lock piece 51 are fitted while being guided by the protrusion 39 b on the inner surface of the elastic claw plate portion 39 described above. The upper and lower end surfaces 51 b are in surface contact with the inner surface of the elastic claw plate portion 39.

    In the embodiment, the lock piece 51 is a strip-shaped vertical bar, but the object of the present invention can be achieved even if the vertical bar is divided into two. In the case of this embodiment, one or a plurality of support walls are formed in the case 21 so that the pair of upper and lower divided lock pieces 51 do not move in the vertical direction, or a plurality of support walls formed on the inner wall surface of the case. It is desirable to form a plurality of streak-like fitting grooves that fit with the protrusions. In addition, when the lock piece 51 is one vertical bar, the form does not ask | require a rod-shaped body, a strip | belt-shaped body, etc. If it adds, the form of the lock piece 51 etc. can be changed arbitrarily in the range which does not deviate from the subject of invention.

    The present invention can be used in the fields of locks and joinery.

  DESCRIPTION OF SYMBOLS 1 ... Window frame, 1a ... Vertical frame, 2 ... Sliding door, 3 ... Fitting hole, 4 ... Lock, 21 ... Case, 22 ... Vertical axis, 23 ... Latch, 24 ... Internal space, 25 ... Spring member, 26 ... Sliding door operation piece, 28 ... flange part, 30 ... right side wall, 35 ... left side wall, 37 ... upper wall, 41 ... lower wall, 39 ... elastic claw plate part, 39a ... claw, 43 ... central space, 51 lock piece.

Claims (5)

A case that is fitted in a fitting hole of a sliding door that opens and closes in the left-right direction, has a flange portion at the front end portion of the side wall, and an elastic claw plate portion on the side wall, and a shaft that is rotatable about the case via a vertical shaft A latch that is supported and has a locking claw at the tip, and is provided integrally with or formed integrally with the base end of the latch, and is located in the internal space of the case, and Within the range, the position is displaced while rotating in the opening direction of the sliding door against the spring force of the spring member by the operating force, and when the operating force is released, the spring force of the spring member reverses the direction of restraining the sliding door A sliding door latch device having a pulling operation piece that returns while rotating,
When the case is fitted into the door, the claw of the elastic claw plate portion is slidably contacted with the edge portion of the fitting hole so that the elastic claw plate portion is elastically displaced toward the inner space side, while the claw is The sliding door latch device is characterized in that the elastic claw plate portion returns when passing through the edge portion, and a locking piece for locking the return state of the elastic claw plate portion is provided in the case. 2. The lock piece according to claim 1, wherein the lock piece is a single vertical bar, and when the lock piece is incorporated in the internal space along the handle operating piece, the both end faces thereof are opposed to each other in the vertical position. A sliding door latch device, wherein the sliding door latch device abuts against each inner surface of the elastic claw plate portion. 3. The lock piece according to claim 1 or 2, wherein the lock piece has an engaging claw piece on a side wall thereof, and when the engaging claw piece is incorporated in the internal space of the case, the lock piece is perpendicular to the side where the sliding door is closed. A sliding door latch device that engages with an engaged portion formed on a side wall. The surface of the pulling operation piece according to claim 1, wherein the surface of the pulling operation piece is formed in a stepped shape, and when the lock piece is incorporated in the internal space of the case, the stepping portion of the pulling operation piece is between the opposing side wall of the lock piece. A sliding door latch device characterized in that there is a gap into which a finger can be inserted. The case according to claim 1, wherein the case is fitted in a fitting hole formed in a sash type vertical shaft of a sliding door that moves left and right in the window frame, and the latch having a locking claw is arranged around a vertical axis. A sliding door latching device, wherein the sliding door latching device is engaged with and disengaged from an engaging portion of a lock receiving member disposed on a surface of a vertical frame that horizontally rotates to form a sash type window frame.

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