JP2010053630A - Lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock device which can be retained in an unlocked state compared with an existing device and can prevent lockout when a sliding screen is closed without operating a handle. <P>SOLUTION: In the lock device 20, unless the handle 35 is operated, rotation of a pole 43 is regulated by abutting a second rotation regulation lever 45A on a second rotation regulation face 43W for preventing lockout. Even when the abutment of the second rotation regulation lever 45A on the second rotation regulation face 43W is insufficient due to variation in machining shapes of components, a first rotation regulation lever 42B runs on a clearance-forming projection 42X arranged on a first rotation regulation face 43V while a latch 42 rotates from a disengaging position to an engaging position and a clearance C1 is formed between the second rotation regulation lever 45A and the second rotation regulation face 43W so that the second rotation regulation lever 45A is moved to the position sufficient enough to abut with the second rotation regulation face 43W. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a locking device that is attached to an inward surface of a door toe of a shoji and is locked by being engaged with a striker fixed to a shoji support frame, and in particular, a lever structure handle that extends in the vertical direction. It is locked on the condition that the shoji is closed by holding the handle in the closed operation position tilted to the side where the shoji is closed, while the handle is tilted toward the opening side where the shoji is opened. The present invention relates to a lock device that is unlocked on the condition that it is rotated and is always biased so that the handle is disposed at a neutral position between the opening operation position and the closing operation position.

  Conventionally, as shown in FIGS. 19 to 23, this type of locking device includes a latch 1, a pole 2, and a handle interlocking plate 3 that can be rotated around rotational axes that are parallel to each other. The latch 1 rotates between an engagement position (see FIG. 23) engaged with the striker 4 and an engagement release position (see FIGS. 19 to 21) from which the engagement is released. The pole 2 rotates between a latch rotation allowable position (see FIG. 19) that allows the latch 1 to rotate and a latch lock position (see FIG. 23) that restricts the rotation of the latch 1. The handle interlocking board 3 rotates between a neutral position (see FIG. 19) and a closing operation position (see FIG. 20) in conjunction with the handle 5. The latch 1 is urged to the disengagement position by the tension spring 6, the pole 2 is urged to the latch lock position by the tension spring 6, and the handle 5 and the handle interlocking panel 3 are neutral by the torsion spring 7. Is being energized.

  Further, the side surface of the pole 2 is provided with a first rotation restriction surface 2A on the latch 1 side and a second rotation restriction surface 2B on the handle interlocking board 3 side.

  The latch 1 is provided with a first rotation restricting lever 1A that protrudes toward the pole 2. The first rotation restricting lever 1A is abutted against the first rotation restricting surface 2A as shown in FIGS. 19 and 22 while the latch 1 rotates from the disengagement position to the front of the engagement position. When the pawl 2 is held at the latch rotation allowable position and the latch 1 reaches the engagement position, as shown in FIG. 23, the pawl 2 is separated from the first rotation restricting surface 2A, and the pawl 2 is moved to the latch lock position. Allow to rotate.

  The handle interlocking board 3 is provided with a second rotation restricting lever 3 </ b> A protruding toward the pole 2. As shown in FIG. 19, the second rotation restricting lever 3A is abutted against the second rotation restricting surface 2B while the handle interlocking board 3 is rotated from the neutral position to the position before the closing operation position. When the handle interlocking panel 3 reaches the closing operation position, as shown in FIG. 20, it is separated from the second rotation restricting surface 2B, and the pole 2 is latched. Allow rotation to the locked position.

  In this lock device, when the shoji is opened, the handle 5 and the handle interlocking board 3 are held at the neutral position, the latch 1 is disposed at the disengagement position, and the pole is the first and second rotation restricting levers 1A. , 3A, the rotation is restricted, and the latch is allowed to be held at the rotation allowable position. Then, when the handle 5 and the handle interlocking panel 3 are tilted and held in the closing operation position and the shoji is closed, the second rotation restricting lever 3A of the handle interlocking panel 3 is disengaged from the second rotation restricting surface 2B of the pole 2. First, the rotation restriction of the pole 2 by the second rotation restriction lever 3A is released. In this state, when the latch 1 is pushed by the striker 4 and rotates from the disengagement position to the engagement position, the first rotation restricting lever 1A of the latch 1 is disengaged from the first rotation restricting surface 2A of the pole 2. The rotation restriction of the pole 2 by the second rotation restriction lever 3A is also released, and the second rotation restriction lever 3A is turned to the latch lock position, and the lock device is locked.

On the other hand, if the handle 5 and the handle interlocking board 3 are held in the neutral position without operating the handle 5 and the shoji is closed, the rotation restriction of the pole 2 by the second rotation restriction lever 3A is not released. Only the rotation restriction of the pole by the first rotation restriction lever 1A is released. For this reason, even if the latch 1 is pushed by the striker 4 and rotated from the disengagement position to the engagement position, the pole 2 does not rotate to the latch lock position, and the locking device is not locked (Patent Document 1). reference).
JP 2007-303183 A (Claim 1, FIG. 1, FIG. 5, FIG. 6, FIG. 10)

  By the way, in the above-described locking device, when the hand is released after the handle 5 is rotated to the closing operation position with the shoji opened, as shown in FIG. 20, the torsion spring 7 as shown in FIG. The handle 5 and the handle interlocking panel 3 are designed to return to the neutral position by the urging force. However, due to variations in the shape of the parts such as the latch 1, the pole 2, and the handle interlocking board 3, the second rotation restricting lever 3 </ b> A of the handle interlocking board 3 is moved to the second rotation of the pole 2 as shown in FIGS. 21 and 22. The handle 5 and the handle interlocking board 3 may not return to the neutral position by the urging force of the torsion spring 7 by being locked at an irregular position such as an end of the restriction surface 2B. In such a locking device, when the shoji is closed without operating the handle 5 on the outside of the shoji, the pole 2 is rotated to the latch lock position as shown in FIG. A so-called shut-out that could not be entered could occur.

  The present invention has been made in view of the above circumstances, and when the shoji is closed without operating the handle, the lock device can be held in an unlocked state as compared with the conventional one, and the occurrence of lock-out is suppressed. It is an object of the present invention to provide a locking device that can be used.

  In order to achieve the above object, a locking device according to the invention of claim 1 is a locking device which is attached to an inward surface of a door toe of a shoji and is locked by being engaged with a striker. A handle with a lever structure that extends to the handle is pivotable, and the handle is locked on the condition that the shoji is closed by holding the handle in a closed operation position tilted to the side that the shoji closes, while the handle opens on the side that the shoji opens It is unlocked on the condition that it is rotated toward the opening operation position inclined to the position, and is always urged so that the handle is disposed at a neutral position between the opening operation position and the closing operation position. The lock device includes a latch, a pawl, and a handle interlocking panel that are rotatable about pivot axes parallel to each other, and the pawl is disposed between the latch and the handle interlocking panel, and the latch is associated with the striker. The combined engagement position and its The pawl rotates between the latch release position that allows the latch to rotate and the latch lock position that restricts the rotation of the latch. The handle interlocking plate is urged to the latch lock position by the pole urging means, and rotates between the neutral position and the closing operation position together with the handle and is urged to the neutral position by the handle urging means. The first rotation restricting surface is provided on the side portion on the latch side, and the second rotation restricting surface is provided on the side portion on the handle interlocking board side, and the latch rotates from the disengagement position to the front of the engagement position. While moving, it is abutted against the first rotation restricting surface and restricts the pole from turning to the latch lock position, and when the latch reaches the engagement position, it is disengaged from the first rotation restricting surface, The first to allow the pole to pivot to the latch lock position A rotation restricting lever is formed in a protruding manner, and the handle interlocking plate is abutted against the second rotation restricting surface while the handle interlocking plate rotates from the neutral position to just before the closing operation position, and the pole moves to the latch lock position. And the second rotation restriction that allows the pole to turn to the latch lock position when the handle interlocking board reaches the closing operation position. The lever is formed to protrude, and the first rotation restricting surface is opposed to the pole urging means by sliding contact with the first rotation restricting lever while the latch is rotated from the engagement release position to the engagement position. It is characterized in that a clearance is generated between the second rotation restricting surface and the second rotation restricting lever by rotating the pole.

  According to a second aspect of the present invention, in the locking device according to the first aspect, the first rotation restricting surface is provided with a first rotation restricting lever while the latch is rotated from the disengagement position to the engagement position. It is characterized in that a clearance generation protrusion is provided for getting on and between the second rotation restricting surface and the second rotation restricting lever.

  According to a third aspect of the present invention, in the locking device according to the first aspect, the first rotation restricting surface is a curved surface, and the tip of the first rotation restricting lever is in a state where the latch is disposed at the disengagement position. At the position, the tip turning locus circle of the first turning restricting lever intersects the first turning restricting surface, and the first turning restricting surface gradually moves toward the inside of the tip turning locus circle as it moves away from the intersection. It is characterized by being configured to enter.

[Invention of Claim 1]
When the shoji is opened, the handle and the handle interlocking board are held in the neutral position by the handle urging means, and the latch is arranged at the disengagement position where the engagement with the striker is released. The pole is restricted in rotation by the first rotation restricting lever provided in the latch and the second turn restricting lever provided in the handle interlocking plate, and is held at the latch turning allowable position.

  Then, when the handle and the handle interlocking board are tilted to the closing operation position and the shoji is closed, the second rotation restricting lever of the handle interlocking board is disengaged from the second rotation restricting surface of the pole. The rotation of the pole by the lever is released. In this state, when the latch is pushed by the striker and rotated from the disengagement position to the engagement position, the rotation restriction of the pole by the first rotation restriction lever is also released, and the pole is moved by the urging force of the pole urging means. It rotates to the latch lock position and the locking device is locked.

  On the other hand, when the shoji is closed with the handle and the handle interlocking panel held in the neutral position without operating the handle, the first rotation restricting lever does not release the rotation restriction of the pole. Only the rotation restriction of the pole by the rotation restriction lever is released. For this reason, even if the latch is pushed by the striker and rotated from the disengagement position to the engagement position, the pole does not rotate to the latch lock position, and the locking device is not locked.

  Now, due to variations in the shape of the parts constituting the lock device, the second rotation restricting lever is locked to the end of the second rotation restricting surface, and the handle interlocking plate returns to the neutral position by the urging force of the handle urging means. A state that does not cut can occur. In the locking device of the present invention, when the shoji is closed without operating the handle in this state, the first rotation restricting surface is formed while the latch is pushed by the striker and rotates from the disengagement position to the engagement position. And the first rotation restricting lever slidably contact the pole urging means to cause the pole to rotate, and a clearance is generated between the second rotation restricting surface and the second rotation restricting lever. With this clearance, for example, even if the second rotation restricting lever is locked at an irregular position such as the end of the second rotation restricting surface due to variations in component shapes, the locking is preferably released, and the handle interlocking board Can return to the neutral position by the biasing force of the handle biasing means. When the latch rotates to the engagement position and the first rotation restricting lever comes off the first rotation restricting surface, the second rotation restricting lever restricts the rotation of the pole. Thus, even if the latch is pushed by the striker and rotated from the disengagement position to the engagement position, the pole does not rotate to the latch lock position, and the locking device is not locked. That is, according to the locking device of the present invention, when the shoji is closed without operating the handle, the locking device can be held in an unlocked state, and the occurrence of lockout can be suppressed.

[Invention of claim 2]
3. The present invention of claim 2, wherein when the shoji is closed with the handle and the handle interlocking plate held in the neutral position in a state where the handle interlocking plate does not return to the neutral position by the biasing force of the handle biasing means as described above. In the locking device according to the second aspect, the first rotation restriction lever rides on the clearance generation protrusion on the first rotation restriction surface, so that the pole rotates against the urging direction of the pole urging means, and the second rotation A clearance is generated between the restriction surface and the second rotation restriction lever. As a result, before the first rotation restricting lever is disengaged from the first rotation restricting surface, the second rotation restricting lever is released from the engagement with the end of the second rotation restricting surface, and the handle interlocking board is Return to the neutral position. Thereby, even if the latch is pushed by the striker and rotated from the disengagement position to the engagement position, the pole does not rotate to the latch lock position, and the locking device is not locked. That is, according to the locking device of the present invention, when the shoji is closed without operating the handle, the locking device can be held in an unlocked state, and the occurrence of lockout can be suppressed.

[Invention of claim 3]
In the state where the handle interlocking panel does not return to the neutral position by the biasing force of the handle biasing means as described above, when the shoji is closed with the handle and the handle interlocking panel held in the neutral position, the present invention of claim 3 In the locking device according to the first rotation restricting surface that enters the inside of the tip rotation locus circle of the first rotation restricting lever while the latch rotates from the disengagement position to the engagement position, The pole is rotated against the urging force of the pole urging means so that the rotation restricting lever is pushed out of the tip turning locus circle, and between the second rotation restricting surface and the second rotation restricting lever. Generate clearance. As a result, before the first rotation restricting lever is disengaged from the first rotation restricting surface, the second rotation restricting lever is released from the engagement with the end of the second rotation restricting surface, and the handle interlocking board is Return to the neutral position. Thereby, even if the latch is pushed by the striker and rotated from the disengagement position to the engagement position, the pole does not rotate to the latch lock position, and the locking device is not locked. That is, according to the locking device of the present invention, when the shoji is closed without operating the handle, the locking device can be held in an unlocked state, and the occurrence of lockout can be suppressed.

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The shoji 12 shown in FIG. 1 has a structure in which a glass plate 12G is stretched inside a rectangular frame-shaped ridge 12K, and is provided in pairs inside the shoji support frame 11 formed on the wall of the building. . The pair of shojis 12 and 12 are opened and closed by sliding so as to rub against each other in the shoji support frame 11.

  As shown in FIG. 2, a pair of projecting walls 12 </ b> T and 12 </ b> T project toward the shoji support frame 11 from the front end surface 12 </ b> S of the door toe 12 </ b> A of the saddle 12 </ b> K. Here, the “door-end heel” refers to an end portion of the heel 12K that is joined to the inner surface 11A of the shoji support frame 11 when the shoji 12 is closed. A longitudinal groove 11M is formed on the inner surface 11A of the shoji support frame 11 as shown in FIG. When the shoji 12 is closed, the projecting walls 12T and 12T enter the vertical groove 11M of the shoji support frame 11.

  A striker 60 is attached to a portion of the inner surface 11A of the shoji support frame 11 that is located on the indoor side of the vertical groove 11M. The striker 60 is formed by assembling a striker cover 62 made of resin to a striker body 61 made of sheet metal. The striker body 61 has a structure in which a horizontal protrusion 61S is formed by bending and bending a strip-shaped sheet metal extending in the vertical direction at an intermediate portion. Further, screw holes 61N and 61N are formed at both ends of the striker main body 61 in the vertical direction, and the striker 60 is fixed to the shoji support frame 11 by screwing the screws passed therethrough into the shoji support frame 11. . Furthermore, a rectangular through hole 61K is formed in the horizontal protrusion 61S, leaving the tip and both sides. Then, the engaging portion 60A left at the tip of the horizontal protrusion 61S engages with a latch 42 described later.

  On the other hand, the striker cover 62 includes a pair of opposed walls 62T and 62T that are substantially semicircular from both sides of the vertically long frame body 62W. In addition, arch walls 62A and 62A protrude from the curved edges of the opposing walls 62T and 62T to the sides approaching each other. The frame body 62W is fitted to the outer edge portion of the striker main body 61, and the opposing walls 62T and 62T cover both side portions of the horizontal protrusion 61S.

  As shown in FIG. 1, the lock device 20 is attached to an inward surface 12 </ b> V facing the indoor side of the door rod 12 </ b> A of each shoji 12. As shown in FIG. 2, the locking device 20 includes a handle 35 that is rotatable on the locking device body 40. The handle 35 extends in the vertical direction, and a projection 35T projects from the position near the lower end of the handle 35 toward the striker 60 side. On the other hand, from the position near the upper end of the lock device main body 40, the handle connecting shaft 51P protrudes toward the indoor side, and the protrusion 35T of the handle 35 is fixed to the handle connecting shaft 51P. The upper part of the handle 35 above the rotation axis J1 extends upward from the lock device main body 40 and has a gap for inserting a hand with the inward surface 12V of the door toe 12A so that it can be gripped. ing. On the other hand, the lower part of the handle 35 from the rotation axis J1 overlaps the lock device main body 40, and therefore cannot be gripped.

  The lock device main body 40 is provided with a plurality of movable parts such as a latch 42 and a pole 43 shown in FIG. 4 assembled in a vertically long box-like fixed base 41 shown in FIG. As shown in FIG. 2, fixed pieces 20K and 20K protrude from both upper and lower ends of the fixed base 41, and each fixed piece 20K is screwed to the door rod 12A. The fixed base 41 is formed by covering a metal base body 41B with a resin cover 41A (see FIG. 2), and a latch 42, a pole 43, and the like are assembled on the base body 41B side.

  As shown in FIG. 2, an assist window 41 </ b> W is formed on a side surface of the fixed base 41 facing the striker 60 side at an intermediate portion in the vertical direction. An assist connecting plate 49 and a contact roller 53, which will be described later, protrude from the assist window 41W. Further, a striker engaging portion 41T that can be inserted between the opposing walls 62T and 62T of the striker cover 62 (see FIG. 3) is formed near the lower end of the fixed base 41, and a striker receiving groove is formed in the striker engaging portion 41T. 41S is formed. The striker receiving groove 41 </ b> S has a groove shape extending in the horizontal direction and is open toward the striker 60. When the shoji 12 is closed, as shown in FIGS. 6 and 10, the engaging portion 60A of the striker 60 is received in the striker receiving groove 41S (hereinafter, the striker 60 is simply received in the striker receiving groove 41S). )

  As shown in FIG. 4, a first support pin 42P is erected on a portion of the fixed base 41 below the striker receiving groove 41S, and the latch 42 is pivotally supported by the first support pin 42P. Has been. In addition to the first support pin 42P, the second support pin 43P, the third support pin 45P, the connection pin 47P1, the slide pins 47P2 and 49T, etc., which will be described later, all have a central axis that is the rotation axis J1 of the handle 35. It is parallel to.

  On the upper edge of the latch 42, the front engagement claw 42A1, the rear engagement claw 42A2 and the first rotation restricting lever 42B are located on the side farther from the side closer to the striker 60 (hereinafter referred to as “front side”) ( Hereinafter, these are formed in order toward the “rear side”. Of these, the first rotation restricting lever 42B protrudes the largest from the first support pin 42P, the tip of the first rotation restricting lever 42B is tapered, and the tip surface is rounded. The rear engagement claw 42A2 protrudes from the side surface of the first rotation restricting lever 42B, and a lock recess 42K is formed between the rear engagement claw 42A2 and the tip of the first rotation restricting lever 42B. A spring mounting piece 42 </ b> C is formed at the rear end portion of the latch 42. One end of a latch pole biasing spring 44 (corresponding to the “pole biasing means” of the present invention) having a tension coil spring structure is attached to the spring mounting piece 42 </ b> C, and latched by the elastic force of the latch pole biasing spring 44. 42 is urged toward the disengagement position described below.

  In the state in which the shoji 12 is opened, as shown in FIG. 4, the latch 42 contacts the lower stopper 41 </ b> G formed on the fixed base 41 and is positioned at the disengagement position. When the latch 42 is positioned at this disengagement position, the front engaging claw 42A1 is retracted below the receiving port in the striker receiving groove 41S, and the rear engaging claw 42A2 is an intermediate portion of the striker receiving groove 41S. Then, the first rotation restricting lever 42B protrudes upward from the striker receiving groove 41S. In this state, when the shoji 12 is closed and the striker 60 is received in the striker receiving groove 41S, the rear engagement pawl 42A2 is pushed by the striker 60 and the latch 42 is engaged, as shown in FIGS. When the latch 42 moves to the engagement position and reaches the engagement position, as shown in FIGS. 6 and 10, the front engagement claw 42A1 shields the striker 60 from the striker 60 in the striker receiving groove 41S.

  As shown in FIG. 4, a second support pin 43P is erected on the fixed base 41 above the striker receiving groove 41S, and the pole 43 is pivotally supported by the second support pin 43P. ing. The pawl 43 is provided with a latch lock piece 43A on the latch 42 side. As shown in FIG. 6, the latch lock piece 43A is a lock between the first rotation restricting lever 42B and the rear engagement claw 42A2 in the latch 42. The latch lock position engaged with the recess 42K, and the latch lock piece 43A is disengaged from the lock recess 42K of the latch 42 as shown in FIGS. 4, 5, and 7 to 11, allowing the latch 42 to rotate. Rotates between unlocked positions.

  Specifically, as shown in FIG. 13, the pole 43 is provided with a disc portion 43E centering on the second support pin 43P, and the latch lock piece 43A is located behind the disc portion 43E (left side in FIG. 13). ). An outer edge portion of the latch lock piece 43A that is away from the second support pin 43P has an arc shape centered on the second support pin 43P. And between the outer periphery circular arc surface 43F which is a side surface of the outer edge part of latch lock piece 43A among the side surfaces of the pole 43, and the outer peripheral surface of the disc part 43E becomes the 1st rotation control surface 43V which concerns on this invention. Yes.

  The first rotation restricting surface 43V has a clearance generation protrusion 43X in the center, and both sides of the clearance generation protrusion 43X are a pair of arcuate surfaces 43V1 and 43V2 that are slightly curved away from the latch 42, respectively. . And as shown in FIG. 13, when the latch 42 is arrange | positioned in a disengagement position, the 1st rotation control lever 42B is faced | matched by the edge part by the side of the disc part 43E among the 1st rotation control surfaces 43V. Thus, the downward rotation of the latch lock piece 43A is prohibited. In this state, the clearance generation protrusion 43X is located inside the rotation locus circle 42X at the tip of the first rotation restriction lever 42B. Then, while the latch 42 moves from the disengagement position to just before the engagement position, the first rotation restricting lever 42B is slidably contacted with the first rotation restricting surface 43V and the pole 43 is rotated to the latch 42 side. As shown in FIG. 14, the first rotation regulating lever 42B rides on the clearance generation protrusion 43X at the intermediate position of the first rotation restriction surface 43V, and the clearance generation protrusion 43X is moved to the first rotation. The pole 43 is slightly rotated to the side away from the latch 42 so as to be pushed outward from the rotation locus circle 42X at the tip of the regulating lever 42B. As shown in FIG. 6, when the latch 42 is located at the engagement position, the first rotation restricting lever 42B is disengaged from the rear end portion of the first rotation restricting surface 43V toward the outer peripheral arc surface 43F, and the latch The downward rotation of the lock piece 43A is allowed.

  As shown in FIG. 13, a pilot protrusion 43B protrudes rearward from a position near the upper end of the rear end portion of the latch lock piece 43A. The other end of the latch pole urging spring 44 is attached to the pilot protrusion 43B. The latch 43 biasing spring 44 biases the pole 43 to the latch lock position (see FIG. 6) and biases the latch 42 to the disengagement position.

  On the pole 43, a lever abutting piece 43C projects from the center of rotation upward. A second rotation restricting surface 43W according to the present invention is formed at the tip of the lever contact piece 43C. Specifically, as shown in FIG. 13, the pole 43 is disposed at the latch rotation allowable position on the side surface 43 </ b> W <b> 1 on the front side (right side in FIG. 13) of the lever contact piece 43 </ b> C from the second rotation restriction surface 43 </ b> W. In this state, the second rotation restricting surface 43W extends obliquely rearward and downward from the upper end portion of the side surface 43W1. Further, the second rotation restricting surface 43W has an arc shape that overlaps a circle centering on a third support pin 45P described later in a state where the second rotation restricting surface 43W is in contact with the distal end surface of the second rotation restricting lever 45A described later. . Note that the side surface 43W2 of the lever abutting piece 43C on the rear side (left side in FIG. 13) of the second rotation restricting surface 43W becomes a steeper slope than the second rotation restricting surface 43W. It extends diagonally backward and downward from the lower end.

  A pull-up link 47 is rotatably connected to a middle part of the latch lock piece 43A of the pole 43 by a connecting pin 47P1. The pull-up link 47 extends obliquely rearward and upward from the pole 43, and an upper end portion of the pull-up link 47 is formed with an oblong hole 47A extending along the longitudinal direction of the pull-up link 47. .

  As shown in FIG. 5, a third support pin 45 </ b> P is erected on the upper portion of the fixed base 41 from the portion where the second support pin 43 </ b> P is erected. The handle interlocking panel 45 and the relay panel 46 shown in the figure are pivotally supported so as to be rotatable. The relay panel 46 includes an open lever 46A and a connecting lever 46B that extend in directions different from each other by approximately 120 degrees from the rotation center. As shown in FIG. 5, the connecting lever 46B extends upward with respect to the third support pin 45P, and the open lever 46A extends obliquely rearward and downward with respect to the third support pin 45P. Further, a sliding pin 47P2 erected from the open lever 46A is engaged in the elliptical hole 47A of the pull-up link 47 so as to be capable of linear movement. Further, a sliding pin 49T is erected from the tip of the connecting lever 46B in the relay panel 46.

  As shown in FIG. 12, the handle interlocking panel 45 includes a second rotation restricting lever 45A and a connecting arm 45B extending in directions different from each other by about 120 degrees from the rotation center, and is directed from the connecting arm 45B to the relay panel 46. Thus, the connecting projection 45C is erected. Further, the distal end surface of the second rotation restricting lever 45A has an arc shape that is curved around the third support pin 45P. Then, as shown in FIG. 5, the second rotation restricting lever 45A extends obliquely forward and downward with respect to the third support pin 45P, and the connecting arm 45B protrudes upward with respect to the third support pin 45P. The protrusion 45C is disposed on the rear side of the connecting lever 46B in the relay panel 46. Further, a torsion coil spring 54 is assembled between the handle interlocking panel 45 and the relay panel 46, and the connecting protrusion 45C is pressed against the side surface of the connecting lever 46B by the urging force of the torsion coil spring 54. Further, the second rotation restricting lever 45A is disposed inside the rotatable region of the lever abutting piece 43C in the pole 43 according to the rotation position of the handle interlocking plate 45 (FIGS. 4, 7 and 7). 8, 9, 10, and 11) and a state (see FIGS. 5 and 6) arranged outside the rotatable region.

  As shown in FIG. 4, a torque transmission shaft 51 </ b> J is rotatably supported at a position near the upper end of the fixed base 41. The torque transmission shaft 51J has a cylindrical shape, and a prismatic handle connecting shaft 51P protrudes from one end surface of the torque transmission shaft 51J. As described above, the handle 35 is fixed to the handle connecting shaft 51P so as to be integrally rotatable. Further, the assist connecting plate 49 projects laterally from the outer peripheral surface of the torque transmission shaft 51J. Specifically, the assist connecting plate 49 is fixed or integrally formed on the outer peripheral surface of the torque transmission shaft 51J so as to rotate integrally with the torque transmission shaft 51J, extends to an intermediate position in the vertical direction of the fixed base 41, and the torque transmission shaft 51J. Are arranged so as to overlap the handle interlocking panel 45, the relay panel 46 and the like in the central axis direction.

  The assist coupling board 49 includes an upper locking portion 49A and a lower locking portion 49B that protrude forward from the outer peripheral surface of the torque transmission shaft 51J. A handle rotation stopper 41J protruding from the fixed base 41 is disposed between the upper locking portion 49A and the lower locking portion 49B. When the handle 35 is tilted toward the side where the shoji 12 (see FIG. 1) is closed, the assist connecting plate 49 rotates in the clockwise direction in FIG. 4 together with the handle 35, and the upper locking portion as shown in FIG. 49A comes into contact with the handle rotation stopper 41J, and the handle 35 and the assist connecting plate 49 are positioned at the closing operation position according to the present invention.

  On the other hand, when the handle 35 is tilted toward the side where the shoji 12 (see FIG. 1) is opened, the assist connecting plate 49 rotates in the counterclockwise direction in FIG. 49B abuts on the handle rotation stopper 41J, and the handle 35 and the assist connecting board 49 are positioned at the opening operation position according to the present invention.

  The handle 35 and the assist connecting plate 49 are normally disposed at a neutral position between the opening operation position and the closing operation position by a handle urging spring 52 (corresponding to the “handle urging means” of the present invention). Yes. Specifically, the handle urging spring 52 causes the coil portion 52A wound around the torque transmission shaft 51J and the both ends of the coil portion 52A to linearly extend behind the torque transmission shaft 51J and face each other. And a pair of straight portions 52B and 52B. Between the pair of straight portions 52B and 52B, a fixed protrusion 41H rising from the fixed base 41 and a movable protrusion 49H rising from the assist connecting board 49 are arranged. The fixed protrusion 41H and the movable protrusion 49H are arranged in the radial direction of the coil portion 52A. Usually, both the straight portions 52B and 52B are arranged on both sides of the fixed protrusion 41H and both sides of the movable protrusion 49H. The handle 35 and the assist connecting board 49 are positioned at the neutral position. Then, when the handle 35 and the assist connecting board 49 are turned to the closing operation position side, as shown in FIG. 5, the movable projecting piece 49H pushes the upper straight portion 52B upward in the figure and the handle biasing spring 52 is moved upward. An urging force is applied which elastically deforms and returns the handle 35 and the assist connecting plate 49 to the neutral position. On the other hand, when the handle 35 and the assist connecting board 49 are rotated to the opening operation position side, as shown in FIG. 8, the movable projecting piece 49H pushes the linear portion 52B downward in the figure and the handle biasing spring 52 is moved downward. An urging force is applied which elastically deforms and returns the handle 35 and the assist connecting plate 49 to the neutral position.

  As shown in FIG. 4, an engagement groove 50 is formed in an intermediate portion of the assist connecting board 49 in the vertical direction. The engagement groove 50 includes an arc portion 50A that extends in a substantially horizontal direction and is gently curved, and a pin holding portion 50B in which a front end portion of the arc portion 50A is bent upward. The sliding pin 49T of the relay board 46 is accommodated. As shown in FIG. 4, in a state where the handle 35 and the assist connecting plate 49 are arranged at the neutral position, the sliding pin 49T is arranged in the pin holding portion 50B, and 1 of the pin holding portion 50B in the front-rear direction. The relay board 46 and the handle interlocking board 45 are positioned at the neutral position together with the handle 35 and the assist connecting board 49, being sandwiched between the inner side surfaces of the pair.

  When the handle 35 and the assist connecting board 49 are rotated from the neutral position shown in FIG. 4 to the closing operation position shown in FIG. 5, the pin holding is performed with the sliding pin 49T disposed in the pin holding portion 50B. The sliding pin 49T is pushed backward by the front inner surface of the portion 50B, and the relay board 46 and the handle interlocking board 45 are rotated counterclockwise in FIG. When the handle 35 and the assist connecting panel 49 are positioned at the closing operation position by the contact between the upper locking portion 49A and the handle rotation stopper 41J, the relay panel 46 and the handle interlocking panel 45 are also positioned at the closing operation position. Is done. At this time, the second rotation restricting lever 45A of the handle interlocking board 45 is retracted upward from the rotation region of the lever contact piece 43C.

  When the handle 35 and the assist connecting board 49 are rotated from the neutral position shown in FIG. 6 to the opening operation position shown in FIG. 8, the sliding pin 49T is moved from the pin holding portion 50B to the arc portion 50A during the rotation. Move to one end. Then, as the sliding pin 49T advances from the end portion on the pin holding portion 50B side to the opposite end portion of the arc portion 50A, the sliding pin 49T is pushed downward in the front side, and the relay panel 46 and the handle interlocking panel 45 are moved. It rotates clockwise in FIG. In the middle of the rotation of the relay board 46, the sliding pin 47P2 contacts the end portion of the elliptical hole 47A of the pull-up link 47 as shown in FIG. When the connecting plate 49 is rotated to the open operation position shown in FIG. 8, the rear end of the pole 43 is pulled up by the open lever 46A of the relay board 46 via the pull-up link 47, and the pole 43 is latched from the latch lock position. It is returned to the rotation allowable position.

  Further, while the pole 43 returns from the latch lock position to the latch rotation allowable position, the second rotation regulating lever 45A and the tip of the lever abutting piece 43C interfere with each other, and the handle is resisted against the urging force of the torsion coil spring 54. The interlocking panel 45 rotates relative to the relay panel 46 in the counterclockwise direction in FIG. When the pole 43 returns to the latch rotation allowable position, the second rotation restricting lever 45A is released from the interference with the lever abutting piece 43C, and the handle interlocking plate 45 rotates in reverse by the urging force of the torsion coil spring 54. Then, the connection protrusion 45C returns to the position where it contacts the side surface of the relay board 46. The distal end portion of the second rotation restricting lever 45A is disposed within the rotation region of the lever abutting piece 43C. Thereafter, when the hand is released from the handle 35, the handle 35, the assist connecting panel 49, the relay panel 46 and the handle interlocking panel 45 are returned to the neutral position by the biasing force of the handle biasing spring 52, and the pole 43 is latched by the latch pole biasing spring 44. The second rotation restricting surface 43W returns to a position where it overlaps with a circle around the third support pin 45P by slightly rotating so as to pull the pull-up link 47 by the urging force. Then, as shown in FIG. 4, the second rotation restricting lever 45 </ b> A is brought into contact with the second rotation restricting surface 43 </ b> W of the pole 43.

  As shown in FIG. 8, at the lower end portion of the assist connecting board 49, a support pin 53P is erected from its front edge portion, and the contact roller 53 is rotatably supported by the support pin 53P. The contact roller 53 has a size that projects forward from the front edge portion of the assist connecting plate 49. Further, the contact roller 53 is accommodated inside the fixed base 41 and faces the assist window 41W of the fixed base 41 when the handle 35 and the assist connecting plate 49 are disposed at the neutral position (see FIG. 4). . Then, when the handle 35 and the assist connecting plate 49 are rotated toward the opening operation position, as shown in FIGS. 7 and 8, a part of the assist connecting plate 49 protrudes forward from the assist window 41W (see FIG. 2). Thus, the contact roller 53 contacts the inner surface 11 </ b> A of the shoji support frame 11.

  This completes the description of the configuration of the present embodiment. Next, the effect of this embodiment is demonstrated. In the state in which the shoji 12 is opened, the handle 35 and the handle interlocking plate 45 are held in the neutral position by the handle biasing spring 52 as shown in FIG. At this time, the latch 42 is disposed at the disengagement position where the engagement with the striker 60 is released. Further, the pawl 43 is in contact with the first rotation restricting lever 42B of the latch 42 and the first rotation restricting surface 43V of the pole 43, and the second rotation restricting lever 45A of the handle interlocking board 45 and the first of the pole 43. The rotation is restricted and held at the latch rotation allowable position by the contact with the 2 rotation restricting surface 43W. That is, when the shoji 12 is opened and the handle 35 and the handle 35 are disposed at the neutral position, the rotation of the pole 43 is restricted by both the first and second rotation restricting levers 42B and 45A, and the latch is turned. It is held in the allowable position.

  As shown in FIG. 5, when a person inside the shoji 12 closes the shoji 12 and locks it, the hand is put on the handle 35 and the shoji 12 is pushed or pulled toward the closing side. As a result, the handle interlocking plate 45 is rotated together with the handle 35 to the closing operation position, and the second rotation restricting lever 45A is disengaged from the second rotation restricting surface 43W of the pole 43. First, the second rotation restricting lever 45A. The rotation restriction of the pole 43 due to is released. In this state, when the shoji 12 is closed, the latch 42 is pushed by the striker 60 and rotates from the disengagement position to the engagement position. Then, the rotation restriction of the pole 43 by the first rotation restriction lever 42B is also released, and the pole 43 is rotated to the latch lock position by the urging force of the latch pole urging spring 44 as shown in FIG. The piece 43A engages with the lock recess 42K of the latch 42. Thereby, the latch 42 cannot reversely rotate to the disengagement position, and the lock device 20 is locked.

  When the hand is released from the handle 35 in the locked state, the handle 35 is returned to the neutral position by the biasing force of the handle biasing spring 52 as shown in FIG. And the handle interlocking board 45 also returns to the neutral position.

  When a person inside the shoji 12 unlocks the lock device 20 and opens the shoji 12, the hand is placed on the handle 35 and the shoji 12 is pushed or pulled to the open side. As a result, as shown in FIG. 7, the assist connecting board 49 rotates together with the handle 35 from the neutral position toward the opening operation position. Then, the turning force of the assist connecting board 49 is transmitted to the handle interlocking board 45 via the sliding pin 49T, and the handle interlocking board 45 rotates in the clockwise direction of FIG. Then, the turning force of the handle interlocking board 45 is transmitted to the pull-up link 47 via the slide pin 47P2, and the pull-up link 47 is pulled upward. Then, the lifting force of the pull-up link 47 pulls the pole 43 upward via the connecting pin 47P1, and the pole 43 rotates from the latch lock position to the latch rotation allowable position to release the engagement with the latch 42. . At this time, the second rotation restricting lever 45A of the handle interlocking plate 45 returns to the state where it is disposed within the rotation region of the lever abutting piece 43C of the pole 43, and the biasing force of the latch pole biasing spring 44 The latch 42 rotates from the engagement position to the engagement release position.

  Further, when the handle 35 is rotated, as shown in FIG. 8, the contact roller 53 at the lower end portion of the assist connecting plate 49 moves outward from the assist window 41W (see FIG. 2) of the fixed base 41. The inner surface 11A (FIG. 3) of the shoji support frame 11 is pushed. Thereby, the load at the time of the initial movement of the shoji 12 is reduced. When the hand is released from the handle 35 after the shoji 12 is opened, the handle 35, the assist connecting panel 49, the relay panel 46, and the handle interlocking panel 45 return to the neutral position, and the second rotation restricting lever 45A of the handle interlocking panel 45 is returned. Is brought into contact with the second rotation restricting surface 43W of the pole 43, and the first rotation restricting lever 42B of the latch 42 returns to the state of being brought into contact with the first rotation restricting surface 43V of the pole 43. That is, in the state where the shoji 12 is opened and the handle 35 is disposed at the neutral position, the rotation of the pole 43 is restricted by both the first and second rotation restricting levers 42B and 45A and the latch is allowed to rotate. Return to the position held in position.

  When the shoji 12 is outside the shoji 12 and is closed from the outside, the shoji 12 is closed with the handle 35 in the neutral position because the handle 35 is not on the outward surface of the shoji 12. Then, as shown in the changes in FIGS. 4 to 9 and 10, the latch 42 is moved from the disengagement position to the engagement position in a state where the rotation restriction of the pole 43 by the second rotation restriction lever 45 </ b> A is maintained. Thus, only the rotation restriction of the pole 43 by the first rotation restriction lever 42B is released. For this reason, even if the latch 42 is engaged with the striker 60 and disposed at the engagement position, the second rotation restricting lever 45A restricts the rotation of the pole 43, so that the pole 43 rotates to the latch lock position. The locking device 20 is not locked. Thereby, generation | occurrence | production of shut-out can be suppressed.

  By the way, when the hand is released after the handle 35 is rotated to the closing operation position with the shoji opened, the second rotation restricting lever 45A of the handle interlocking panel 45 is indicated by a two-dot chain line in FIG. In this way, after separating upward from the lever contact piece 43C of the pole 43, it returns to the lever contact piece 43C side by the urging force of the handle urging spring 52. At this time, due to variations in the shape of the parts constituting the locking device 20, the urging force of the handle urging spring 52 or the urging force of the torsion coil spring 54 that transmits the urging force of the handle urging spring 52 to the handle interlocking plate 45 is When the handle interlocking panel 45 does not return to the neutral position as shown by the solid line in FIG. 11 due to the frictional resistance between the second rotation restricting lever 45A and the second rotation restricting surface 43W of the lever contact piece 43C. Can occur. For this reason, the facing area of the butting between the second rotation restriction lever 45A and the second rotation restriction surface 43W is extremely small, and the rotation restriction of the pole 43 by the second rotation restriction lever 45A with the shoji 12 opened. May fail.

  Although not shown, the first rotation restriction of the first rotation restriction surface 43V of the pole 43 located at the unlocking position and the first rotation restriction of the latch 42 located at the disengagement position due to variations in the shape of the parts constituting the lock device 20. When a slight gap is generated between the lever 42B and the second rotation restricting lever 45A, when the second rotation restricting lever 45A is separated upward from the lever contact piece 43C, the biasing force of the latching pole biasing spring 44 causes the pole 43 Turns to the latch 42 side, and the tip of the lever abutting piece 43C enters the inside of the turning area of the second turning regulating lever 45A. Therefore, when the hand is released from the handle 35, the tip of the lever abutting piece 43C comes into contact with the side surface near the tip of the second rotation restricting lever 45A, and the handle interlocking plate 45 is neutral with the shoji 12 open. There may be a case where the rotation of the pole 43 by the second rotation restricting lever 45A does not function because it cannot return to the position.

  However, in such a case, in the locking device 20 of the present embodiment, even if the shoji 12 is closed without operating the handle 35, the occurrence of lockout is suppressed as will be described in detail below. That is, as shown in an enlarged view in FIG. 13, in order to prevent the handle interlocking plate 45 from returning to the neutral position, the handle 35 is moved in a state where the rotation restriction of the pole 43 by the second rotation restriction lever 45A is not functioning. When the shoji 12 is closed without being operated, the latch 42 is pushed by the striker 60 and rotates from the disengagement position to the engagement position, and the first rotation restricting lever 42B is first rotated along with the rotation. The regulating surface 43V is slid and moved. Then, in the middle of the sliding movement, as shown in FIG. 14, the first rotation restricting lever 42B rides on the clearance generating projection 43X provided on the first rotation restricting surface 43V, and the pawl 43 biases the latch pole. It rotates against the spring 44. As a result, a clearance C1 is generated between the second rotation restricting surface 43W and the second rotation restricting lever 45A, and the end portions of the second rotation restricting lever 45A and the second rotation restricting surface 43W are generated by the clearance C1. The lock at the irregular position is released.

  In addition, after the first rotation restricting lever 42B has passed over the clearance generation protrusion 43X, the second rotation restricting surface 43W and the second turn are performed while slidingly moving on the arc surface 43V2 of the first rotation restricting surface 43V. The tip surface of the movement regulating lever 45A approaches. When the latch 42 is rotated to the engagement position and the first rotation restriction lever 42B is disengaged from the first rotation restriction surface 43V, the second rotation restriction lever 45A restricts the rotation of the pole 43. become. Thereby, generation | occurrence | production of shut-out can be suppressed.

  As described above, according to the lock device 20 of the present embodiment, when the shoji 12 is closed without operating the handle 35, the lock device 20 can be held in an unlocked state, and the occurrence of lock-out can be suppressed. Can do. In addition, since the clearance C1 is provided between the second rotation restricting surface 43W and the second rotation restricting lever 45A without increasing the processing accuracy of the parts, the degree of suppression of the occurrence of the shut-off is improved, so that the manufacturing cost is increased. Can be suppressed. Further, in the lock device 20 of the present embodiment, after the first rotation restricting lever 42B gets over the clearance generation protrusion 43X, the clearance C1 is gradually moved by slidingly moving on the arc surface 43V2 of the first rotation restricting surface 43V. Becomes smaller. Since the first rotation restricting lever 42B is disengaged from the first rotation restricting surface 43V after the clearance C1 becomes small, the difference due to the collision between the second rotation restricting lever 45A and the second rotation restricting surface 43W. Generation of sound is suppressed.

  As shown in FIG. 15, the second pivoting operation is performed in a state where the handle interlocking plate 45 is disposed at the neutral position and the pole 43 is held at the latching pivoting allowable position by the first pivoting control lever 42B of the latch 42. Even with the structure in which the clearance C2 is formed between the restriction surface 43W and the distal end surface of the second rotation restriction lever 45A, the second rotation restriction lever 45A and the second rotation restriction surface 43W described above are in an irregular position. Locking at can be prevented. However, in this structure, the first rotation restricting lever 42B is disengaged from the first rotation restricting surface 43V, and the rotation of the pole 43 is performed only by contact between the second rotation restricting lever 45A and the second rotation restricting surface 43W. In the state where the movement is restricted, as shown in FIG. 16, the facing area of the second turning restriction lever 45A with respect to the second turning restriction surface 43W becomes extremely small, and the pole 43 by the second turning restriction lever 45A becomes smaller. There also arises a problem that the function of restricting rotation is lowered. However, the above problem does not occur in the locking device 20 of the present embodiment.

[Second Embodiment]
The locking device 20U of the present embodiment is shown in FIGS. 17 and 18, and the shape of the first rotation restricting surface 43U is different from the first rotation restricting surface 43V of the first embodiment. That is, the first rotation restricting surface 43U of the present embodiment has an arc shape that is slightly curved toward the side away from the latch 42. Further, the corner between the first rotation restricting surface 43U and the outer circumferential arc surface 43F has a rounded shape. As shown in FIG. 17, when the latch 42 is disposed at the disengagement position, the first rotation restricting lever 42B is abutted against the end portion on the disk portion 43E side of the first rotation restricting surface 43U. In this state, the rotation trajectory circle 42X at the tip of the first rotation restricting lever 42B intersects with the tip position of the first rotation restricting lever 42B, and the inside of the tip turning trajectory circle 42X increases as the distance from the intersection increases. It is configured to gradually enter. Since other configurations are the same as those in the first embodiment, a duplicate description is omitted.

  According to the locking device 20U of the present embodiment, when the shoji 12 is closed without the handle interlocking plate 45 returning to the neutral position by the urging force of the handle urging spring 52 as described above, the latch 42 is disengaged. During the rotation from the position to the engagement position, the first rotation regulating lever 42B has the tip of the first rotation regulating surface 43U that has entered the inside of the rotation locus circle 42X at the tip of the first rotation regulating lever 42B. As shown in FIG. 18, the pole 43 is rotated against the biasing force of the latch pole biasing spring 44 so as to be pushed out of the rotation locus circle 42X. A clearance C1 is generated between the rotation regulating lever 45A. As a result, like the locking device 20 of the first embodiment, the second rotation restriction lever 45A is moved to the second rotation restriction surface 43W before the first rotation restriction lever 42B is disengaged from the first rotation restriction surface 43U. The handle interlocking board 45 returns to the neutral position and is prevented from being locked out by being released from the engagement with the end portion.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the embodiment described above, the locking device 20 of the present invention is attached to the pair of shojis 12 and 12 that slide so as to pass each other in the shoji support frame 11, but only one in the shoji support frame 11. You may attach the locking apparatus 20 of this invention to the provided shoji. In addition, a door device of one of the shojis 12 out of a pair of shojis 12 and 12 arranged on the same straight line of the shoji support frame 11 is provided with a lock device, and a striker is placed on the door of the other shoji. May be provided.

  (2) Although the shoji 12 of the above embodiment is a so-called glass door with a glass plate 12G stretched, the shoji may be a wooden door or a metal door.

The front view of the shoji unit which concerns on 1st Embodiment of this invention. Perspective view of lock device and door toe Strike perspective view Front sectional view of the locking device with the shoji open Partial front sectional view of the locking device with the handle in the closed operation position Partial front sectional view of the locking device with the shoji closed in the locked state Partial front sectional view of the lock device in the process of moving the handle to the open operation position Partial front sectional view of the locking device with the handle placed in the open operation position Partial front sectional view of the locking device in the process of closing the shoji with the handle in the neutral position Partial front sectional view of the locking device with the shoji closed in the unlocked state Partial front sectional view of the locking device in the process of moving the handle to the neutral position Perspective view of relay panel and control lever Partial front sectional view of the locking device with the shoji open Partial front sectional view of the locking device in the process of closing the shoji with the handle in the neutral position Partial front sectional view of the locking device with the shoji open Partial front sectional view of the locking device in the process of closing the shoji with the handle in the neutral position Partial front sectional view of the lock device in a state in which the shoji of the second embodiment is opened Partial front sectional view of the locking device in the process of closing the shoji with the handle in the neutral position Partial front sectional view of a lock device with a conventional shoji open Partial front sectional view of the locking device with the handle placed in the open operation position Partial front sectional view of the locking device in the process of moving the handle to the neutral position Partial front sectional view of the locking device in the process of closing the shoji without returning the handle to the neutral position Partial front sectional view of the locking device with the shoji closed in the locked state

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Latch 1A 1st rotation control lever 2 Pole 2A 1st rotation control surface 2B 2nd rotation control surface 3 Handle interlocking board 3A 2nd rotation control lever 4 Striker 5 Handle 6 Spring 7 Torsion spring 11 Shoji support frame 12 Shoji 12A Door toe 20, 20U Locking device 35 Handle 40 Locking device main body 41 Fixed base 41S Strike receiving groove 42 Latch 42B First rotation regulating lever 42K Lock recess 42X Tip rotation locus circle 43 Pole 43A Latch lock piece 43C Lever Contact 43V, 43U First rotation regulating surface 43W Second rotation regulating surface 43X Clearance generating projection 44 Latch pole biasing spring (pole biasing means)
45 Handle interlocking board 45A Second rotation restricting lever 45B Connecting arm 45C Connecting protrusion 46 Relay board 47 Pull-up link 49 Assist connecting board 50 Engaging groove 52 Handle biasing spring (handle biasing means)
54 Torsion coil spring 60 Strike C1, C2 Clearance J1 Rotating shaft

Claims (3)

A locking device attached to an inward surface of a shoji door toe and engaged and locked by a striker, and is provided with a handle having a lever structure extending in a vertical direction so that the handle can be rotated. It is locked on the condition that the shoji is closed while being held in the closing operation position inclined toward the closing side, while the handle is rotated toward the opening operation position inclined toward the opening side of the shoji. In a locking device that is unlocked on condition and always biased so that the handle is placed in a neutral position between the opening operation position and the closing operation position,
A latch, a pawl, and a handle interlocking panel that are rotatable around pivot axes parallel to each other, and the pawl is disposed between the latch and the handle interlocking board,
The latch rotates between an engagement position engaged with the striker and an engagement release position released from the engagement,
The pawl rotates between a latch rotation allowing position that allows the latch to rotate and a latch lock position that restricts the rotation of the latch, and is biased to the latch lock position by a pole biasing means. And
The handle interlocking board rotates between the neutral position and the closing operation position together with the handle and is urged to the neutral position by a handle urging means,
The pole is provided with a first rotation restricting surface on the side on the latch side and a second turn restricting surface on the side on the handle interlocking board side,
While the latch rotates from the disengagement position to the front of the engagement position, the latch is abutted against the first rotation restricting surface and the pawl rotates to the latch lock position. And a first rotation restricting lever that allows the pawl to turn to the latch lock position by detaching from the first turning restricting surface when the latch reaches the engagement position. Is formed protruding,
The handle interlocking plate is abutted against the second rotation restricting surface while the handle interlocking plate rotates from the neutral position to just before the closing operation position, and the pawl rotates to the latch lock position. A second that restricts movement and allows the pawl to rotate to the latch lock position by detaching from the second rotation restricting surface when the handle interlocking plate reaches the closing operation position. A rotation restricting lever is formed to protrude,
The first rotation restricting surface resists the pole urging means by sliding contact with the first rotation restricting lever while the latch is rotated from the disengagement position to the engagement position. A locking device characterized in that a clearance is generated between the second rotation restricting surface and the second rotation restricting lever by rotating the pole.   While the latch is rotated from the disengagement position to the engagement position, the first rotation restriction lever rides on the first rotation restriction surface, and the second rotation restriction surface and the The lock device according to claim 1, further comprising a clearance generating protrusion for generating the clearance between the second rotation regulating lever.   The first rotation restricting surface is a curved surface, and the first rotation restricting lever is rotated at the tip end position of the first rotation restricting lever in a state where the latch is disposed at the disengagement position. The movement trajectory circle and the first rotation restricting surface intersect with each other, and the first rotation restricting surface gradually enters the inside of the tip end turning locus circle as it moves away from the intersection. The locking device according to claim 1.

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