JP2010133197A5 - - Google Patents

Description

Sliding door lock

  The present invention relates to a sliding door lock provided with a latching mechanism. In particular, the present invention relates to a sliding door lock provided with a sickle piece interlocking with a trigger when the sliding door is closed.

  Patent Document 1 discloses a latching mechanism. FIG. 9 shows an example of the latching mechanism Z described in Patent Document 1. The configuration of the latching mechanism Z will be described using the reference numerals described in Patent Document 1 as they are. The latching mechanism Z includes a “trigger 31, a latch plate 45 that is pivotally supported by the fixed shaft 25, has an engagement tooth 47 on the outer periphery, and rotates in conjunction with the forward / backward movement of the trigger 31, Engage with and disengage from the engaging teeth 47 and are pivotally supported by the movable pin 27 and urged by the return spring 60, and engage with the temporary locking engagement claw piece 51 and the temporary locking engagement claw piece and slide in the vertical direction. This is a latching mechanism Z for a sliding door lock having a disengagement piece 50 urged by a return spring 56 disposed in a vertical direction in the lock case 10 when the sliding door (not shown) is strongly closed. When rebounding occurs, the temporary locking pawl 51 is resisted against the spring force of the return spring 60 by the force in the disengagement direction received from the engagement teeth 47 and the engagement. In the horizontal guide slot 54 formed in the inner end of the release piece 50 Through the engaging pin 55 and the movable pivot pin 27 engaged with the escape guide slot 26 formed in the lock case 10, the play gap 54 a side of the horizontal guide slot 54 and the release guide slot 26. ”Simultaneously moves toward the buffering gap 26a”.

  Therefore, in Patent Document 1, a matter that is a prerequisite of the present invention, that is, “a trigger 31 that is horizontally movable on the lock box 10 (case body 10 a), and a fixed laterally mounted on the lock box 10. A latch plate 45 that is pivotally supported by the shaft 25 and has an engaging tooth 47 on the outer periphery, and rotates in conjunction with the forward and backward movement of the trigger 31, and a temporary locking mechanism that engages and disengages the engaging tooth 47. An engagement release piece 50 provided in the lock box 10 so as to slide up and down by the operating force of the operating means, and the temporary locking locking claw piece engages with the latch plate 45. It comprises a return spring 56 that always biases the disengagement piece 50 so that it can engage with the teeth 47, and the disengagement piece 50 resists the spring force of the return spring 56 by the operating force of the operating means. And then sliding the temporary locking locking claw piece to the disengagement piece 5 Sliding door lock "is disclosed by Tsuido away from the engagement tooth 47.

  Although the latching mechanism Z of the lock is proposed by the applicant of the present application to your office, there is a problem that the combination is troublesome because of the large number of parts.

  In other words, when an operating means (not shown) is operated, the engagement release piece 50 includes a third fixed shaft 52 provided near the bottom wall of the lock case 10 and a vertical guide slot 53 formed in the engagement release piece 50. The locking claw piece 51 for temporary locking, which slides downward through the shaft, follows each spring of the return spring 56 and the return spring 60 with the movable pin 27 separate from the third fixed shaft 52 as a fulcrum. Since it is configured to rotate counterclockwise (disengagement direction) against the force, a plurality of shaft holes, guide long holes 26 and the like must be formed in the side wall of the corner portion 61 of the lock case 10. In addition to the movable pin 27 for the temporarily locking locking claw piece 51, the third fixed shaft 52 for the engagement releasing piece 50 is required.

Reference numeral 37 denotes a second movable shaft projecting from the continuous portion 34 extending below the laterally long flange portion of the trigger 31, 46 denotes a latch long hole formed in the upper end portion of the latch plate 45, and 57 denotes an engagement. An engaging end portion of the pawl piece 51, 61 is a corner portion of the lock case, and 62 is a spring support shaft 62 that supports the central portion of the return spring 60.
JP 2002-322850 A

  The intended purpose of the present invention is to reduce the number of parts as much as possible in view of the problems of Patent Document 1, and to facilitate the combination. The second purpose is to give a plurality of functions to one return spring. The third object is that when the operating means is operated, the disengagement slide piece that moves in the vertical direction does not swing left and right.

  The sliding door lock according to the present invention is supported by a lock box, a trigger, and a fixed shaft 25 horizontally provided on the lock box, and has an engagement tooth on the outer periphery, and is interlocked with the forward / backward movement of the trigger. And a latch plate for temporary unlocking, which includes a latch plate for temporary locking that engages and disengages with the engaging teeth, and slides up and down by the operating force of the operating means, and the pawl for temporary locking. Is provided with a return spring that constantly biases the disengagement slide piece so that the disengagement slide piece can be engaged with the engagement teeth of the latch plate, and the disengagement slide piece is When sliding against the spring force of the return spring, the locking claw piece for temporary locking follows the sliding piece for disengagement and slides for disengagement in the sliding door lock separated from the engaging teeth. The piece 50A is disposed in the corner 61 of the lock box 10, and the engagement releasing slide piece A fixed pivot 27A that pivotally supports the base end of the temporary locking pawl piece passes through the portion, and the return spring 56A is attached to the fixed pivot, and the return spring latches the temporary locking pawl piece. It is characterized in that the engagement releasing slide piece is urged to the initial position at the same time as always urging in the direction of engagement with the engagement teeth of the plate.

  The sliding door lock of the present invention is supported by a trigger 31A on a lock box and a fixed shaft 23A horizontally provided on the lock box, and has engagement teeth 47A on the outer periphery of the rear end. A disengagement slide piece that includes a sickle piece 40A that rotates in conjunction with the advance and retreat of the trigger, and a temporary locking claw piece that engages and disengages with the engagement tooth and that slides up and down by the operating force of the operating means. And a return spring that always urges the disengagement slide piece so that the temporary locking pawl piece can be engaged with the engagement teeth of the sickle piece 40A. When the piece slides against the spring force of the return spring by the operating force of the operating means, the temporary locking pawl piece is driven by the disengaging slide piece to separate from the engaging tooth. In this case, the disengagement slide piece 50A is disposed at the corner 61 of the lock box 10. The fixed pivot 27A that pivotally supports the base end of the temporary locking latch claw piece passes through the inner end of the disengagement slide piece, and the return spring 56A is attached to the fixed pivot. The temporary locking engagement pawl piece is always urged in the direction to engage with the engagement teeth of the sickle piece 40A, and at the same time, the disengagement slide piece is urged to the initial position.

(A) Since the number of parts can be reduced as much as possible and the combination can be facilitated, the problem of Patent Document 1 is solved.
(B) A single return spring can have a plurality of functions.
(C) In the invention according to claim 3, when the operating means is operated, the disengagement slide piece that moves in the vertical direction does not swing left and right.
(D) According to the invention described in claim 4, the lock box can be made compact.

  The best mode (first embodiment) for carrying out the present invention shown in FIGS. 1 to 6 will be described below. In the description of the first embodiment of the present invention, the same parts as those in the embodiment of FIG. 9 are denoted by the same reference numerals for convenience of comparison.

(1) Environment for carrying out the invention First, the environment for carrying out the invention will be described with reference to FIG. X is a carved sliding door lock that is housed in the sliding door 1. On the other hand, Y is a metal fitting fixedly attached to the door frame 2. The receiving metal Y is composed of a troyoke 3 having a box portion and a strike (receiving seat) 4 superimposed on the opening of the troying 3. The strike 4 is formed in a vertically long plate shape, and is fixed to an ear-shaped attachment portion of the troyoke 3 via a plurality of fixing means 5.

  Reference numeral 6 denotes a push-and-hold piece that is appropriately fixed to the troyoke 3 so as to slightly protrude from the vertically long window 7 of the strike 4. The push-and-hold piece 6 can be brought into contact with the tip of the trigger. The pushing and engaging piece 6 is provided in consideration of the “Chile” setting, but basically constitutes a part of the strike 4. Therefore, when the strike 4 closes the sliding door 1, the trigger 31, which will be described later, is moved backward via the pushing and engaging piece 6.

(2) Lock case 10
Next, the lock case will be described with reference to FIGS. Reference numeral 10 denotes a lock case that is installed in the vertical wall of the sliding door 1. The lock case 10 includes a case body 10a and a wide plate-like case lid 10b that closes a large opening of the case body.

  Reference numeral 11 denotes a front fixed to the opening on the front side of the lock case 10. The front 11 is generally fixed to a long plate-like cover plate (or front wall) 12 of the lock case 10 in general. Reference numeral 13 denotes a plurality of second fixing means for fixing the lock case to the sliding door 1. 14 is a vertically long sickle piece access window, while 15 is a rectangular trigger window. The trigger window 15 communicates with the sickle piece access window 14.

(3) Corner 61 of the lock box 10 and features of the present invention Here, the configuration of the shaft hole and the like of the lock case 10 will be briefly described with reference to FIG. Reference numeral 20 denotes a horizontally long guide slot formed in the horizontal direction near the front 11 at the center of the case lid 10b. The horizontally long guide slot 20 includes an arcuate guide portion 20a and a linear guide portion 20b continuous therewith. Become. Reference numeral 21 denotes a first movable shaft for a sickle piece which engages with the horizontally long guide slot 20, reference numeral 22 denotes a round shaft hole for a sickle piece formed in the vicinity of the horizontally long guide slot 20, and 23 denotes the circular axis hole 22. The first fixed shaft 24 for the sickle piece supported on the circular shaft hole 24 supports the second fixed shaft 25 for the latch plate provided obliquely below the circular shaft hole 22 for the sickle piece. Reference numeral 26 denotes a perfect circular shaft hole formed at the corner 61 of the lock box 10 (in this embodiment, the lower corner of the rear end of the lock box and the vicinity of the lower corner). The circular shaft hole 26 supports one fixed pivot shaft 27A described later.

  Here, with reference to FIG. 3, the corner 61 of the lock box 10 and the features of the present invention will be described. The corner portion 61 has a rear end portion 18 a of the bottom wall 18 and a lower end portion of the rear wall partly cut away 16. In this embodiment, the disengagement slide piece 50A is mounted on the corner 61 of the lock box 10 via the fixed pivot 27A so that the entire vertical rear wall 50a protrudes from the rear wall of the case body 10a. Has been. This is for considering the engagement / disengagement of the latch plate 45 described above and for making the depth of the lock box 10 as small as possible.

  Further, the rear end portion 18a of the bottom wall 18 of the case body 10a at the corner portion 61 is formed by bending the rear end portion 18a inward at a substantially right angle so that the other end portion b of the return spring 56A described later is formed. A stopper 17 for receiving is formed. Further, the rear end 18a having the stopper 17 receives a top edge of an outer end connected to the inner end of the engagement releasing slide piece 50A (for example, a receiving surface, a stopper surface, a receiving piece, etc.). It has become.

  As described above, in this embodiment, (a) the corner 61 of the lock box 10 has the fixed pivot 27 </ b> A horizontally mounted through the perfect circular shaft hole 26, (b) The central portion of the return spring 56A is wound around the fixed pivot 27A, and its one end a is in pressure contact with the inner wall surface of the engagement end 57 of the temporary locking claw piece 51, while the other end b is the bottom wall. 18 is characterized in that it is in pressure contact with a stopper 17 at the rear end 18a of 18 or a stopper member 17 provided in the lock box. (C) The return spring 56A always urges the temporary locking pawl piece 51 in a direction to engage with the engaging teeth 47 of the latch plate 45, and simultaneously releases the disengagement slide piece 50A. It is characterized in that it is biased to the initial position that is directly or indirectly locked to the receiving member 18a formed on the receiving member 18a or the receiving member 18a provided on the lock box 10. (D) Further, in the present invention, the temporary locking latch claw piece 51 that is always urged in the engagement direction by the spring force of the return spring 56A is used as a restriction means for the temporary locking latch claw piece 51 that stops at a predetermined position. In the embodiment, the engagement long hole 58 is formed in the engagement end portion 57 of the temporary locking engagement claw piece, while the engagement long hole 58 is engaged with the inner end portion of the disengagement slide piece 50A. A movable restricting pin 59 is provided. (E) Furthermore, as shown in FIG. 3 and FIG. 4, a pair of rectangular vertical guide long holes 19 are formed in a stepped manner on the wide side wall of the corner portion 61 at a predetermined interval in front and rear, The vertical guide elongated holes 19 have a pair of flat plate-like plates formed on the inner end of the engagement release slide piece 50A so as to prevent the engagement release slide piece 50A from shaking. The engaging protrusions 62 and 62 are engaged with each other. (F) In addition, the engagement releasing slide piece 50A is fixed to the corner 61 of the lock box 10 via the fixed pivot 27A so that the entire vertical rear wall 50a protrudes from the rear wall of the case body 10a. It is installed.

(4) Trigger: Horizontal advance / retreat member Next, the trigger will be described with reference to FIGS. A trigger 31 is slidably mounted in the lock case 10. When the sliding door is open as shown in FIG. 2, the trigger 31 has a short hook-shaped tip 32 that protrudes from the front 11 of the lock case 10 and a horizontally long shape that is connected to the protruding tip 32 so as to be slightly wider. It consists of a collar 33.

  A trigger spring 35 is incorporated in the lateral direction between the rear end surface of the laterally long flange 33 and the rear wall of the case body 10a. The front end of the trigger spring 35 is appropriately pressed against the rear end surface of the horizontally elongated flange 33, while the rear end is supported by a spring support (not shown) provided on the rear wall. Therefore, the trigger 31 is urged so that a part of the tip end portion 32 always protrudes from the front 11.

  The trigger 31 is guided by a trigger guide (not shown) formed in the lock case 10 when the lock case 10 is moved forward and backward. At this time, the trigger 31 needs to be smoothly guided without rattling. Therefore, protrusion-like engagement protrusions (not shown) that engage with the trigger guide are provided on both side walls of the horizontally long flange 33 of the trigger 31. The trigger 31 is provided with a part of a power conversion mechanism that rotates the sickle piece 40 and the latch plate 45 in the engaging direction when the trigger moves backward into the lock case 10.

  A part of the power conversion mechanism on the trigger 31 side includes an engaged portion (downward recess, notch, etc.) 36 with which the sickle piece first movable shaft 21 is engaged, and a horizontally elongated flange 33 of the trigger 31. This is a second movable shaft 37 protruding from a continuous portion 34 extending downward.

(5) Trigger spring The trigger spring 35 starts to contract as the trigger 31 moves backward when the tip 32 of the trigger 31 abuts against the pushing and engaging piece 6 of the strike 4 when the sliding door 1 is closed. On the other hand, as the sliding door 1 is opened, the distal end portion 32 extends away from the pushing and engaging piece 6 as the trigger 31 advances.

(6) Sickle piece The sickle piece 40 has a shape in which the index finger is bent as a whole, and the first movable shaft 21 is projected from the base portion 40a. The first movable shaft 21 is engaged with the horizontally long guide slot 20 of the lock case 10 and the downward recess 36 of the trigger 31. The sickle piece 40 is pivotally supported by the first fixed shaft 23 through a sickle piece long hole 41 formed on the wide base 40a side. The power conversion mechanism on the sickle piece 40 side has at least the first movable shaft 21 as a constituent feature in this embodiment. As a result, the sickle piece 40 is interlocked with the trigger 31 via the power conversion mechanism (the first movable shaft 21 for the sickle piece, the downward recess 36, the first fixed shaft 23).

(7) Latch plate The latch plate 45 is pivotally supported by the second fixed shaft 25. The latch plate 45 is connected to the second movable shaft 37 of the trigger through a latch long hole 46 formed at one end. Therefore, the latch plate 45 also rotates in conjunction with the advance / retreat movement of the trigger 31 like the sickle piece 40. Reference numeral 47 denotes ratchet teeth formed on the outer periphery of the other wide end of the latch plate 45.

(8) Slide piece 50A for disengagement and locking claw piece 51 for temporary locking
In the lower part of the lock case 10 of the sliding door lock X, the disengagement slide piece 50A for bringing the sickle piece 40 into a temporarily locked state or canceling the temporarily locked state and the disengagement slide piece are interlocked ( A latching mechanism Z1 comprising a temporary locking locking claw piece 51 mounted on the disengagement slide piece 50A via a fixed support shaft 27A is incorporated.

  As described above, the temporary locking locking claw piece 51 is engaged with and disengaged from the engaging teeth 47 formed on the outer periphery of the latch plate 45 in this embodiment. The basic configuration of the temporary locking locking claw piece 51 is the same as that of Patent Document 1. Therefore, the detailed description is omitted. For example, as shown in FIG. 4, the engagement claw piece 51 for temporary locking has an engagement end portion 57 corresponding to the free end portion thereof formed in a U-shape that faces downward on the end surface. The shaft hole is formed and supported by a fixed support shaft 27A fitted in the shaft hole.

  Here, with reference to FIG.3 and FIG.4, the structure of the slide piece 50A for engagement cancellation | release is demonstrated. As described above, reference numeral 50 a denotes a vertical rear wall that protrudes from the rear wall of the lock box 10 through the notch 16. The vertical rear wall 50a is provided with a U-shaped vertical side wall (a front side wall in FIG. 4) 50b that is orthogonal to the vertical rear wall 50a. As shown in FIG. 2, the vertical side wall 50 b moves up and down along the inner wall surface of the case lid 10 b when the disengagement slide piece 50 </ b> A is incorporated in the lock box 10.

  Reference numeral 64 is a vertical long hole (a relief hole) formed in the upper end portion of the vertical side wall 50b (corresponding to the inner end portion of the disengaging slide piece 50A). The shaft 27A penetrates. The vertical elongated hole 64 should desirably have a function of guiding the engagement releasing slide piece 50A in the vertical direction via the fixed support shaft 27A. The vertical elongated hole is provided with a function of sliding the engagement releasing slide piece 50A. Since it is sufficient to have a function of moving the vertical direction, it is not always necessary to form the vertical elongated hole. In the present embodiment, as described above, the guide means of the disengagement slide piece 50A includes the stepped vertical guide slot 19 formed in the wide side wall of the corner 61 and the upper end of the vertical rear wall 50a. And a pair of front and rear engaging projecting piece portions 62, 62 that project in a stepped manner so as to be orthogonal to the vertical rear wall 50a and engage with the vertical guide long holes 19, respectively.

  Reference numeral 59 designates a movable restricting pin provided at the tip of the vertical long hole (relief hole) 64 at the upper end of the vertical rear wall 50a. The movable restricting pin 59 is a locking claw for temporary locking. It engages with the engagement elongated hole 58 of the engagement end portion 57 of the piece 51. Further, 50c is an outer end-facing wall that is connected to the other vertical end of the vertical rear wall 50a and faces the outer end of the vertical side wall 50b. The outer end facing wall 50c and the lower end of the vertical side wall 50b A rectangular fitting hole 65 that fits (connects) with the fitting portion 66a of the operating means 66 is formed in the corresponding outer end portion.

(9) Return spring 56A
The return spring 56A is attached to the fixed pivot 27A. In this embodiment, as shown in FIG. 5, the temporary locking engagement pawl piece 51 is always urged in a direction to engage with the engagement teeth 47 of the latch plate 45, and at the same time, the disengagement slide piece 50 </ b> A is moved. The bearing 18a formed in the lock box 10 or the receiving member 18a provided in the lock box 10 is biased directly or indirectly to the initial position. In other words, the central portion of the return spring 56A is wound around the fixed pivot 27A, and its one end a is in pressure contact with the inner wall surface of the engagement end 57 of the temporary locking latch pawl 51, while the other end b Is in pressure contact with the stopper 17 of the rear end 18a of the bottom wall 18 (FIG. 3). Thus, the return spring 56A wound around the fixed support shaft 27A is provided with the first urging function for constantly urging the temporary locking engagement claw piece 51 in the engagement direction and the temporary locking engagement claw piece 51. And a common biasing function (second biasing function) for returning the disengagement slide piece 50A to the initial position.

(10) Operation FIG. 2 shows an example in which the sliding door 1 is opened. In this case, (a) the short rod-shaped tip 32 of the trigger 31 slightly protrudes from the front 11 by the spring force of the trigger spring 34 ( ) The sickle piece 40 is rotated backward to the lock case 10 side. (C) The latch plate 45 rotates in the same direction as the sickle piece 40 in conjunction with the advancement of the trigger 31, and is separated from the engagement end portion (locking portion) 57 of the temporary locking locking claw piece 51. (D) Furthermore, the disengagement slide piece 50A is raised to the initial position where it comes into contact with the receiving (for example, the rear end) 18a of the bottom wall 18 by the spring force of the return spring 56A (non-temporarily locked state).

  On the other hand, FIG. 5 shows a state in which the sliding door 1 is closed. As described in Patent Document 1, when the sliding door 1 is closed, the sickle piece 40 and the latch plate 45 are interlocked with the trigger 31, but the latch plate 45 is counterclockwise with the fixed shaft 25 as a fulcrum. , The engaging teeth 47 are engaged with the engaging end 47 while pressing the upper surface of the engaging end 75 of the temporary locking pawl 51 against the spring force of the return spring 56A. The upper end of the portion 75 is exceeded and the tip of the engagement end portion 75 is reached (temporary locking state).

  In the locked state, when the disengaging slide piece 50A slides downward against the spring force of the return spring 56 by the operating force of the operating means 65, the temporary locking pawl piece 51 is fixed. The pivot 27A is rotated clockwise by the pivot 27A as a fulcrum, and separated from the engagement tooth 47 of the latch plate 45 (see FIG. 6).

  When the operating force of the operating means 65 is released, the disengagement slide piece 50A is received by the receiver 18a formed on the lock box 10 or the receiver provided on the lock box 10 by the common biasing function of the return spring 56A described above. It returns to the initial position where it is directly or indirectly locked to the member 18a.

  In this section, a second embodiment of the present invention shown in FIGS. 7 and 9 will be described. Note that the same or similar reference numerals are given to the same parts of the configurations of the second embodiment and the first embodiment, and redundant description is omitted.

  First, the configuration of the second embodiment is the same as that of the first embodiment. (1) When the trigger 31A hits the strike 4A when the sliding door 1 is closed, the trigger 31A is guided to the guide portion of the lock case 10. (2) A point where the sickle piece 40A rotates in a direction to engage with the strike 4 via the power conversion mechanism when the trigger 31A moves backward into the lock case 10; The case 10 has a built-in latching mechanism Z1 for temporarily locking the sickle piece 40A when the door is closed.

  Next, the main difference between the configuration of the second embodiment and that of the first embodiment is that (a) the power conversion mechanism and (b) ratchet teeth 47A are formed at the rear end of the sickle piece 40A, There is no latch plate, and (c) the other forms of the trigger 31A and sickle piece 40A are different.

  Thus, the power conversion mechanism will be described. Reference numeral 70 denotes a rack formed on the lower side of the trigger 31A. On the other hand, 71 is a pinion that meshes with the rack 70, and the pinion 71 is formed on the outer periphery of the central portion of the sickle piece 40A with reference to the first fixed shaft 23A that pivotally supports the sickle piece 40A. Such a power conversion mechanism is a known fact, but even if a known configuration including the rack 70 and the pinion 71 is adopted, the same object and action as in the first embodiment can be obtained. Since the latching mechanism Z1 applied to the second embodiment is the same as that of the first embodiment, the detailed description of the configuration and operation is omitted.

  The present invention is mainly used in the locksmith and joinery industries.

1 to 6 are explanatory views showing a first embodiment of the present invention. 7 and 8 are explanatory views showing a second embodiment of the present invention. FIG. 9 is an explanatory view showing an example of the prior art.
The perspective view of 1st Example. The schematic explanatory drawing which shows the internal structure of an example which opened the sliding door. Explanatory drawing of the principal part. The exploded perspective view of the principal part. Schematic explanatory drawing which shows the internal structure of an example which closed the sliding door. The schematic explanatory drawing at the time of pulling an operation means below. The schematic explanatory drawing similar to FIG. 2 of 2nd Example. Explanatory drawing similar to FIG. 3 of 2nd Example. Explanatory drawing which shows an example of the past.

X ... Sliding door lock, Z1 ... Latching mechanism, 1 ... Sliding door, Y ... Bracket, 1 ... Door frame, 4, 4A ... Strike, 10 ... Lock box, 16 ... Partially cutout, 17 ... Stopper (or stopper member), DESCRIPTION OF SYMBOLS 19 ... Vertical guide long hole, 23, 23A ... 1st fixed axis | shaft, 25 ... 2nd fixed axis | shaft, 26 ... True circular hole, 27A ... Fixed support axis | shaft, 31, 31A ... Trigger, 40, 40A ... Sickle piece 45 ... Latch plate, 47, 47A ... engagement teeth, 50A ... sliding piece for disengagement, 51 ... locking pawl piece for temporary locking, 56A ... return spring, 57 ... engagement end, 58 ... engagement length Holes 59 ... restricting pins 61 ... corners 62 ... engaging protrusions 65 ... fitting holes 66 ... operating means 70 ... racks 71 ... pinions

Claims (5)

A lock plate, a trigger, a latch plate that is pivotally supported by a fixed shaft laterally provided in the lock box, has an engaging tooth on the outer periphery, and rotates in conjunction with the forward and backward movement of the trigger; A disengagement slide piece that includes a temporary locking engagement claw piece that engages and disengages with the engagement tooth and that slides up and down by the operating force of the operation means, and the temporary locking engagement claw piece is an engagement tooth of the latch plate A return spring that constantly biases the disengagement slide piece so that the disengagement slide piece can be engaged with each other, and the disengagement slide piece resists the spring force of the return spring by the operating force of the operating means. When the sliding tab 50A is slid, the temporary locking pawl piece is moved to the disengagement slide piece and separated from the engagement teeth. Arranged in the corner 61, the temporary locking locking claw is attached to the inner end of the disengaging slide piece. The fixed pivot 27A that pivotally supports the base end of the shaft passes through, and the return spring 56A is attached to the fixed pivot, and the return spring engages the temporary locking pawl pieces with the engagement teeth of the latch plate. A sliding door lock characterized by constantly urging in a direction and simultaneously urging the disengagement slide piece to an initial position. In Claim 1, the center of one return spring 56A is wound around one fixed pivot 27A, and one end thereof is in pressure contact with the inner wall surface of the engagement end of the temporary locking engagement pawl piece 51. On the other hand, the other end is in pressure contact with a stopper 17 provided at the corner of the lock box. In claim 1, a pair of vertical guide slots 19 are formed in the wide side wall at the corner, and the vertical guide slots prevent the sliding pieces 50A for releasing the engagement from shaking. A sliding door lock, wherein a pair of engaging protrusions 62 formed on the inner end of the disengaging slide piece are engaged with each other. In claim 1, the disengagement slide piece 50A is connected to the corner portion 61 of the lock box 10 via the fixed pivot 27A so that all of the vertical rear wall 50a protrudes from the rear wall of the case body 10a. A sliding door lock, characterized in that it is mounted. The lock box is supported by a trigger 31A and a fixed shaft 23A horizontally provided in the lock box, and has an engagement tooth 47A on the outer periphery of the rear end portion, and in conjunction with the advance and retreat of the trigger. 40A of rotating sickle pieces, the engagement-release slide piece which is provided with the temporary locking claw piece which engages / disengages with the said engagement tooth | gear, and slides to the up-down direction with the operating force of an operation means, and the said engagement claw piece for temporary locking Is provided with a return spring that always urges the disengagement slide piece so that the disengagement slide piece can be engaged with the engagement teeth of the sickle piece 40A. When sliding against the spring force of the return spring, the temporary locking pawl piece follows the engagement releasing slide piece and moves away from the engaging tooth. The slide piece 50A is disposed in the corner 61 of the lock box 10, and this engagement release slice is provided. A fixed pivot 27A that pivotally supports the base end of the temporary locking pawl piece passes through the inner end of the piece, and the return spring 56A is attached to the fixed pivot, and the return spring is connected to the temporary locking pawl. A sliding door lock characterized in that the piece is always urged in a direction to engage with the engaging teeth of the sickle piece 40A, and at the same time, the disengaging slide piece is urged to an initial position.