JP2008106592A - Lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lock device, automatically locked when closing a sash window, and capable of preventing a shutout accident. <P>SOLUTION: In this invention, the lock device 120 is locked by closing the sash window 12, by holding a handle 35 in a closing operation position, when an indoor person pulls the sash window 12 to the closing side, by hooking a hand on the handle 35 of the lock device 120. The lock device 120 is also unlocked by holding the handle 35 in an opening operation position, when pulling the sash window 12 to the opening side, by hooking the hand on the handle 35. The lock device 120 is not locked when closing the sash window 12 by holding the handle 35 in a neutral position without being operated, when closing the sash window 12 by going outside the sash window 12. Thus, when the person staying inside the sash window 12 closes the sash window 12, crime preventive performance is improved by being automatically locked, and when closing the sash window 12 by going outside the sash window 12, the shutout accident can be prevented since the lock device is not locked. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a locking device that is attached to a door rod of a shoji and is locked by being engaged with a striker fixed to a shoji support frame.

Conventionally, when this type of locking device is operated in a state where the shoji is closed, the locking device is held in a state of being engaged with the striker. And if the handle of a lever structure provided in the lock device is gripped and the shoji is pulled in the opening direction, the handle is rotated by the operation force, and the lock device is unlocked. That is, the unlocking operation and the shoji opening operation can be performed at one time (see Patent Document 1).
JP 2004-52218 A (paragraphs [0024], [0030], FIGS. 1 and 2)

  By the way, since the above-described locking device is not locked unless the locking operation is performed after closing the shoji, there may have been a situation in which the locking is forgotten while the shoji is closed. Therefore, it is desired to develop a locking device that is automatically locked only by closing the shoji. However, if it is structured to be locked only on the condition that the shoji is simply closed, if such a locking device is provided on the shoji at the entrance, even if the shoji is inadvertently closed from the outside. There was a so-called shut-out accident where the door was locked and could not return to the inside of the shoji.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a locking device that is automatically locked when a shoji is closed and that can prevent a lock-out accident.

  The locking device according to the invention of claim 1 made to achieve the above object is a locking device that is attached to a door toe of a shoji and is locked by being engaged with a striker fixed to the shoji support frame. The handle with a lever structure extending in the vertical direction is provided inside the shoji, the handle rotates around a horizontal axis perpendicular to the sliding direction of the shoji, and the shoji It is possible to move between the closed operation position tilted to the close side, and is always urged to be placed in a neutral position between the open operation position and the close operation position, and holds the handle in the open operation position. The door is unlocked on the condition that the shoji is opened, while it is configured to be locked on the condition that the shoji is closed by holding the handle in the closing operation position, and rotates together with the handle. Handle connecting panel and handle in neutral position And an assist movable member that protrudes toward the shoji support frame and moves between the shoji support frame and the door toe in accordance with the movement to the open operation position. The first and second projections projecting in opposite directions across the pivot center, and the first projection is The urging force is applied so as to enter the turning area of the handle connecting panel, and the assisting movable member rotates as the first protrusion is pushed by the handle connecting board while the handle is moving from the neutral position to the opening operation position. The second protrusion is characterized in that it is configured to protrude toward the shoji support frame.

  According to a second aspect of the present invention, in the locking device according to the first aspect, the latch moves between the engagement position engaged with the striker and the disengagement position released from the engagement, and the latch is allowed to move. The latch is moved from the disengaged position to the engaged position while the handle is in the neutral position, and the pawl is movable between the latch movement allowable position to be held and the latch lock position for holding the latch in the engaged position. When the latch is moved to the latching position when the latch is moved from the disengagement position to the engagement position while the handle is in the closing operation position, the pole is moved to the latch lock position. It is characterized in that it is provided with a pole moving mechanism that moves the pole from the latch lock position to the latch movement allowable position in conjunction with the movement from the neutral position to the opening operation position.

  According to a third aspect of the present invention, in the locking device according to the second aspect, the pawl moving mechanism is provided at the latch and the pawl. A pole movement restricting portion that prohibits the pole from moving to the latch lock position when the latch is in the engagement position, and a pole that urges the pole to the latch lock position when the latch is in the engagement position. It is provided between the urging means and the handle and the pole, and when the handle is located in the neutral position, it engages with the pole to resist the urging force of the pole urging means to bring the pole to the latch movement allowable position. A control member that holds and allows the pole to move to the latch lock position by releasing the engagement with the pole when the handle is in the closed operation position by releasing the engagement with the pole. Characterized in place is provided.

  According to a fourth aspect of the present invention, in the locking device according to the second or third aspect, a main body cover that covers the outer surface of the main body other than the handle of the locking device, a lock state determination window formed on the main body cover, and a lock state determination window And a lock state display member in which a part of the color that can be visually recognized through the lock state determination window is made different in accordance with the position of the pole.

  According to a fifth aspect of the invention, in the locking device according to any one of the first to fourth aspects, when the shoji is closed without operating the handle, the handle is moved from the neutral position to the closed operation position by inertial force. This is characterized by the provision of a counter balancer for preventing the above.

  A sixth aspect of the present invention is the locking device according to any one of the first to fifth aspects, wherein the assist movable member moves between a handle lock position within the rotation area and a handle lock release position outside the rotation area. When it is arranged at the handle lock position, it is prevented from rotating from the neutral position to the open operation position by interfering with the assist movable member when it is arranged at the handle lock position. It is characterized in that an assist movable member and a handle lock operating member that allows the handle to rotate are provided.

  According to a seventh aspect of the present invention, in the locking device according to the sixth aspect, in the state where the handle is disposed at the neutral position, the front surface of the second movable protrusion of the assist movable member facing the shoji support frame side is A lock abutting projection is formed to project forward from an intermediate portion in the vertical direction, and the lock operating member is provided so as to be movable up and down, and is disposed in front of the lock abutting projection at the handle lock position, while the handle lock releasing position. Thus, it has a feature in that a rotation interference portion is provided on the rotation center side of the assist movable member from the handle lock position.

[Invention of Claim 1]
According to the configuration of claim 1, when a person inside the shoji puts his hand on the handle and pushes or pulls the shoji to the closing side, the handle is held in the closing operation position, the shoji is closed, and the locking device is locked. The When a person inside the shoji puts his hand on the handle and pushes or pulls the shoji toward the opening side, the handle is held at the opening operation position and the lock device is unlocked. When the shoji is closed outside the shoji, since the handle is not on the outdoor side, it is not operated and is held in a neutral position, the shoji is closed, and the locking device is not locked. Thus, according to the present invention, when the person inside the shoji closes the shoji, it is automatically locked, so there is no situation where the shoji is forgotten to be locked and the crime prevention performance is improved. Since it is not locked when the shoji is closed outside the shoji, it can be prevented from being locked out.

  In addition, when the shoji is pushed or pulled by placing a hand on the handle to open the closed shoji, and the handle is turned from the neutral position to the opening operation position, the handle connecting board is rotated together, and the assist movable member is Abuts against the first protrusion. Then, when the first protrusion is pushed by the handle connecting plate, the assist movable member rotates in the opposite direction to the handle connecting plate against the urging force, and among the assist movable members, the first protrusion is The 2nd protrusion part which protruded on the opposite side protrudes toward the shoji support frame, and pushes and spreads between the shoji support frame and the door-end fence. Thereby, a shoji can be opened easily.

[Invention of claim 2]
According to the second aspect of the present invention, when the handle is held in the closing operation position and the shoji is closed, the latch provided in the locking device comes into contact with the striker and moves to the engagement position, and engages with the striker. At this time, the pawl moves from the latch movement allowable position to the latch lock position to fix the latch in the engagement position, thereby locking the locking device. When the hand is released from the handle after closing the shoji, the handle returns to the neutral position. When the handle is moved from the neutral position to the opening operation position and the shoji is opened, the pole moves from the latch lock position to the latch movement allowable position in conjunction with the operation, and the latch is released from the engagement position. The lock device is unlocked. As the shoji is released, the latch is pushed by the striker and moves to the disengagement position.

[Invention of claim 3]
As described above, the pole moving mechanism that varies the operation of the pole according to the position of the handle is provided in the latch and the pole as in the lock device of claim 3, and the latch is located at a position other than the engagement position. In some cases, a pole movement restricting portion that abuts against each other and prohibits the pole from moving to the latch lock position, and allows the pole to move to the latch lock position when the latch is located at the engagement position; Pole urging means for urging the pole to the latch lock position and provided between the handle and the pole. When the handle is located at the neutral position, the urging force of the pole urging means is engaged by engaging the pole. If the pole is held at the latching movement allowable position and the handle is in the closing operation position, the pole is latched by the biasing force of the pole biasing means by releasing the engagement with the pole. The movement of the click position may be set to the configuration and control member provided to allow.

[Invention of claim 4]
According to the configuration of the fourth aspect, it is possible to easily determine whether the lock device is in the locked state or the unlocked state based on the color displayed in the lock state determination window.

[Invention of claim 5]
When closing the shoji without operating the handle, if the door toe of the shoji collides with the shoji support frame and suddenly stops, the handle can be rotated by inertial force. By providing the counter balancer, it is possible to prevent the handle from moving from the neutral position to the closing operation position due to inertial force.

[Invention of claim 6]
According to the configuration of the sixth aspect, when the handle lock operating member is disposed at the handle lock position, the handle is restricted from rotating from the neutral position to the open operation position due to interference between the handle lock operating member and the assist movable member. The Also, in order to open the shoji from this state, it is necessary to move the handle lock operating member to the handle unlocking position and then rotate the handle to the opening operating position. Will improve.

[Invention of Claim 7]
According to the configuration of the seventh aspect, in a state where the lock operation member is disposed at the handle lock position, the rotation interference portion provided in the lock operation member is locked contact protruding from the second protrusion of the assist movable member. Arranged in front of the protrusion to restrict the rotation of the assist movable member and the handle. On the other hand, in a state where the lock operation member is disposed at the handle lock release position, the rotation interference portion is retracted to the rotation center side from the lock contact protrusion, and the assist movable member and the handle are allowed to rotate.

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
The shoji unit 10 shown in FIG. 1 includes a pair of shojis 12 and 12 slidable inside a shoji support frame 11 formed on the wall of a building. Each shoji 12 has a structure in which a glass plate 12G is stretched inside a rectangular frame-shaped ridge 12K. 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, the horizontal protrusion 61S is formed with a rectangular through hole 61K leaving the tip and both sides. The engaging portion 60A left at the tip of the horizontal protrusion 61S is engaged with a latch 42 described later.

  On the other hand, the striker cover 62 includes a pair of opposing walls 62T and 62T protruding from both sides of the vertically long frame 62W. Both opposing walls 62T and 62T have a substantially trapezoidal shape, and arch walls 62A and 62A protrude from the edge portions on 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 120 is attached to an inward surface 12 </ b> V facing the indoor side of the door toe 12 </ b> A of each shoji 12. As shown in FIG. 2, the lock device 120 includes a handle 35 that is rotatable on the lock device main body 140.

  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, the handle connecting shaft 51P (see FIG. 5) protrudes from the intermediate position in the vertical direction of the lock device main body 140 toward the indoor side, and the protrusion 35T of the handle 35 is fixed to the handle connecting shaft 51P. Has been. In the handle 35, a gap SP1 (see FIG. 16) for inserting a hand is formed between the upper part of the horizontal axis J1 and the lock device main body 140, and can be gripped. On the other hand, since there is only a slight gap between the portion of the handle 35 below the horizontal axis J1 and the lock device main body 140, the handle 35 cannot be gripped (see FIG. 16). As shown in FIG. 2, a vertically long groove 35 </ b> M is formed in a portion of the handle 35 above the horizontal axis J <b> 1, thereby reducing the weight of the upper portion of the handle 35. It is also possible to operate the handle 35 with a fingertip inserted into the groove 35M.

  As shown in FIG. 4, the lock device main body 140 is formed by assembling a plurality of movable parts such as a latch 42 and a pole 43 to the fixed base 41. The fixed base 41 includes a sheet metal support base 41B inside a resin casing-like main body cover 41A. Further, fixed pieces 20K and 20K project from both upper and lower ends of the support base 41B. A screw insertion hole 20N is formed through each fixed piece 20K, and the lock device main body 140 is fixed to the door rod 12A by a screw passed therethrough.

  An assist window 41W is formed on a side surface facing the striker 60 side at a portion near the upper end of the fixed base 41 (see FIG. 2). An assist connecting plate 149 and a contact roller 53, which will be described later, protrude from the assist window 41W.

  Near the lower end of the fixed base 41, a striker engaging portion 41T that can be inserted between the opposing walls 62T and 62T of the striker cover 62 is formed, and a striker receiving groove 41S is formed in the striker engaging portion 41T. The striker receiving groove 41 </ b> S extends in the horizontal direction and opens toward the striker 60. When the shoji 12 is closed, as shown in FIG. 6, 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). .

  Note that a substantially trapezoidal stepped portion 41V (see FIG. 2) is formed in a portion of the striker engaging portion 41T away from the striker 60, corresponding to the tip shape of the opposing wall 62T.

  As shown in FIG. 5, a first support pin 42P stands 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. On the upper edge of the latch 42, the front engagement claw 42A1, the rear engagement claw 42A2 and the stopper contact piece 42B are located on the side farther from the side closer to the striker 60 (hereinafter referred to as “front side”) These are referred to as “rear side” in order. Further, a spring mounting portion 42 </ b> C is formed at the rear end portion of the latch 42. One end of a tension coil spring 44 is attached to the spring attachment portion 42 </ b> C, and the latch 42 is biased toward the engagement release position described below by the elastic force of the tension coil spring 44. The spring mounting portion 42C stands up in parallel with the first support pin 42P in order to make the dimension of the fixed base 41 in the width direction (left and right direction in FIG. 5) compact (see FIG. 12).

  In the state in which the shoji 12 is opened, as shown in FIG. 5, the latch 42 contacts the stopper ST <b> 1 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 stopper contact piece 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, as shown in FIG. 6, the rear engagement pawl 42A2 is pushed by the striker 60 and the latch 42 is brought into the engagement position. The front engaging claw 42A1 moves and shields the receiving port side of the striker receiving groove 41S from the striker 60 (state of FIG. 7).

  As shown in FIG. 5, a second support pin 43P stands 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. On the pole 43, a latch contact piece 43A projects from the center of rotation toward the rear in FIG. The lower end portion of the latch contact piece 43A has an arc shape along the turning locus of the tip of the stopper contact piece 42B. When the latch 42 is disposed at a position other than the engagement position (see FIG. 5), the tip of the stopper contact piece 42B is abutted against the lower edge portion of the latch contact piece 43A, and the latch contact piece 43A. Is not allowed to move downward. Further, when the latch 42 is located at the engagement position (see FIG. 7), the tip of the stopper contact piece 42B is located behind the latch contact piece 43A, and the latch contact piece 43A is moved downward. Allow.

  As shown in FIG. 5, a pilot protrusion 43B is formed at a position near the upper end of the rear end portion of the latch contact piece 43A. The pilot protrusion 43B stands up in parallel with the second support pin 43P in order to make the dimension of the fixed base 41 in the width direction (left and right direction in FIG. 5) compact (see FIG. 12). The other end of the tension coil spring 44 is attached. Accordingly, the latch contact piece 43A is biased toward the latch 42. A lever abutting piece 43C projects from the pivot 43 upward from the center of rotation. When the pole 43 is urged counterclockwise by the tension coil spring 44, the lever contact piece 43C is pressed against the control lever 45 described below, and the pole 43 is positioned at the latch movement allowable position. Has been. In a state where the pawl 43 is positioned at the latch movement allowable position, the latch contact piece 43A is held above the rotatable region of the stopper contact piece 42B, and the latch 42 is engaged with the engagement position (see FIG. 7). It can freely rotate between the release position (see FIG. 5).

  A pull-up link 47 is rotatably connected by a pin 47P1 to an intermediate portion of the pawl 43 between the latch contact piece 43A and the lever contact piece 43C. The pull-up link 47 extends obliquely upward and rearward from the pole 43, and has an oval hole 47A at its upper end. And the sliding pin 47P2 which stood up from the relay panel 46 mentioned later is accommodated in this ellipse hole 47A. Note that the upper end portion of the pull-up link 47 is curved in a substantially arc shape in order to make the dimension of the fixed base 41 in the width direction (left-right direction in FIG. 5) compact, and an oval hole is correspondingly formed. 47A is also curved in a substantially arc shape.

  As shown in FIG. 5 to FIG. 7, when the control lever 45 is rotated and separated from the lever abutting piece 43 </ b> C, and the latch 42 is positioned at the engagement position, the pole 43 is elastically released from the tension coil spring 44. It rotates by force and moves to the latch lock position. Accordingly, the latch contact piece 43A is engaged between the stopper contact piece 42B of the latch 42 and the rear engagement claw 42A2, and the latch 42 is held (locked) in the engagement position.

  A lock state display member 36 shown in FIG. 14 is connected to the pilot protrusion 43 </ b> B of the pole 43. The lock state display member 36 is for displaying whether the pawl 43 is disposed at either the latch lock position or the latch movement allowable position, and a main body constituting a surface of the fixed base 41 facing the indoor side. A display plate portion 36A is accommodated in a gap between the cover 41A and the support base 41B (see FIG. 4). An arm portion 36C protrudes from the upper end portion of the display plate portion 36A toward the pole 43, and a pole is formed between a pair of engaging claws 36D and 36D provided in pairs at the tip of the arm portion 36C. 43 pilot protrusions 43B are received. As shown in FIG. 2, a lock state determination window 33A is formed at the lower end of the fixed base 41, and a part of the display plate portion 36A is exposed to the outside through the lock state determination window 33A. As shown in FIG. 14, the upper end portion of the display board portion 36 </ b> A is provided with a lock display portion 36 </ b> B that is colored in a color different from the entire display board portion 36 </ b> A and displays a word indicating “locked state”. When the pole 43 is disposed at the latch movement allowable position, the lock state display member 36 other than the lock display portion 36B is exposed to the outside through the lock state determination window 33A (FIG. 15B and When the pawl 43 is disposed at the latch lock position, the lock display portion 36B is exposed to the outside through the lock state determination window 33A (see FIG. 15A).

  A third support pin 45P is erected above the portion of the fixed base 41 where the second support pin 43P is erected, and the control lever 45 and the relay panel 46 are pivoted to the third support pin 45P. It is pivotally supported. As shown in FIG. 13, the relay panel 46 includes an open lever 46 </ b> A and a connecting lever 46 </ b> B extending in directions different from each other by approximately 120 degrees from the rotation center (specifically, rearward and upward in FIG. 5). . Further, a contact protrusion 46C protrudes toward the control lever 45 from the lower edge of the open lever 46A in the relay panel 46.

  On the other hand, the control lever 45 includes an interference projecting piece 45A that projects downward and obliquely forward, and a contact projecting piece 45C that projects downward and obliquely rearward. Then, according to the rotation position of the control lever 45, the tip of the interference projecting piece 45A is disposed inside the rotatable region of the lever contact piece 43C in the pole 43 (see FIG. 5), and the rotation thereof. The state is changed to a state (see FIG. 7) arranged outside the movable region. Further, the entire contact protrusion 45C protrudes toward the relay panel 46, and the contact protrusions 45C and 46C of the control lever 45 and the relay panel 46 according to the relative rotational positions of the control lever 45 and the relay panel 46. They come and go. Further, a torsion coil spring 54 (see FIG. 5) is provided between the control lever 45 and the relay panel 46, and the abutting protrusions 45C and 46C are urged by the torsion coil spring 54 so as to contact each other. .

  As shown in FIG. 5, a sliding pin 49T stands from the tip of the connecting lever 46B in the relay board 46, and this sliding pin 49T is connected to an assist connecting board 149 described later. A sliding pin 47P2 stands on the tip of the open lever 46A in the relay panel 46. As described above, the sliding pin 47P2 is disposed in the oblong hole 47A of the lifting link 47 that is pivotally supported by the pole 43.

  In the present embodiment, the “pole movement restricting portion” according to the present invention includes the stopper contact piece 42B and the latch contact piece 43A, and the “control member” according to the present invention includes the control lever 45, The relay panel 46 and the torsion coil spring 54 are used. Further, the “pole moving mechanism” according to the present invention includes a stopper contact piece 42B and a latch contact piece 43A as “pole movement restriction portions”, a tension coil spring 44 as “pole urging means”, and a “control member”. The control lever 45, the relay panel 46, and the torsion coil spring 54.

  A rotating shaft 51J formed integrally with the handle connecting board 151 is pivotally supported on the fixed base 41 above the third support pin 45P. A handle connecting shaft 51P is provided at the center of the rotating shaft 51J, and the handle 35 is fixed to the handle connecting shaft 51P as described above. As a result, the handle connecting plate 151 rotates integrally with the handle 35.

  A torsion spring 52 is provided between the handle connecting board 151 and the fixed base 41. The handle 35 is urged by the resilient force of the torsion spring 52 so that the handle 35 is always placed at a neutral position where the handle 35 stands vertically.

  A pin receiving groove 151 </ b> A that opens toward the relay board 46 is formed at the lower end of the handle connection board 151. A sliding pin 49T of the relay board 46 is slidably received in the pin receiving groove 151A. Thereby, the relay board 46 can be rotated in conjunction with the handle 35.

  A cam contact lever 151 </ b> B extends upward from the upper end of the handle coupling plate 151. As shown in FIG. 9, when the handle 35 is rotated from the neutral position toward the opening operation position (counterclockwise in FIG. 9), the tip of the cam contact lever 151B is in the middle of the assist connection described later. Abuts on the board 149. As a result, the assist connecting board 149 can rotate in conjunction with the handle 35.

  In the handle connecting plate 151, a stopper contact piece 151C projects laterally at an intermediate portion between the pin receiving groove 151A and the cam contact lever 151B. When the handle 35 is rotated from the neutral position toward the opening operation position, the stopper abutting piece 151C abuts against the stopper wall ST2 (see FIG. 12) that stands up from the support base 41B. As shown, the handle 35 is positioned at the opening operation position.

  A spring locking portion 151D is integrally formed behind the cam contact lever 151B in the handle connecting plate 151, and one end of the torsion spring 52 is locked there. The spring locking portion 151D is erected at a right angle in the thickness direction of the handle connecting plate 151 (see FIG. 12). The other end of the torsion spring 52 is locked to a spring locking wall 41D formed upright on the fixed base 41 (support base 41B).

  Here, since the handle 35 of the present embodiment is longer than the lower side from the center of rotation, when the shoji 12 is closed without operating the handle 35, the door toe 12A collides with the shoji support frame 11. Then, if the handle 35 is suddenly stopped, the upper portion of the handle 35 can be rotated to the side closer to the shoji support frame 11 by the inertial force. In order to prevent this, as shown in FIG. 12, a counter balancer 59 is provided at the lower end portion of the handle connecting board 151. The handle connecting board 151 and the counter balancer 59 are made of metal and have a higher specific gravity than the resin handle 35.

  In the fixed base 41, a fourth support pin 49P1 is erected almost directly above the rotation shaft 51J, and the assist connecting plate 149 is pivotally supported by the fourth support pin 49P1. Yes. The assist connecting board 149 is disposed above the handle connecting board 151 and substantially on the same plane as the handle connecting board 151 (see FIG. 16), and has a seesaw structure that rotates around the fourth support pin 49P1. There is no.

  More specifically, the assist connecting board 149 includes a cam protrusion 149A (corresponding to the “first protrusion” of the present invention) and a retractable arm 149B (corresponding to the “second protrusion” of the present invention in a direction opposite to the fourth support pin 49P1. (Corresponding to a "protrusion") and projecting. The cam protruding piece 149A protrudes from the fourth support pin 49P1 toward the handle connecting plate 151. On the other hand, the retracting arm 149B extends upward from the fourth support pin 49P1, and is longer than the cam protrusion 149A. The contact roller 53 is pivotally supported by the support pin 53P standing from the tip of the retractable arm 149B.

  A tension coil spring 144 is provided between the assist connecting board 149 and the fixed base 41. One end of the tension coil spring 144 is attached to a spring attachment portion 149C formed upright on one side edge portion of the retractable arm 149B. Further, the other end of the tension coil spring 144 is attached to a spring attachment portion 41C that stands up from the opposite side of the spring attachment portion 149C across the protruding and retracting arm 149B in the support base 41B (see FIG. 12). As shown in FIG. 5, the elastic force of the tension coil spring 144 causes the assist connecting plate 149 to have the cam projecting piece 149 </ b> A project toward the rotation region of the cam contact lever 151 </ b> B and the retractable arm 149 </ b> B to the inside of the fixed base 41. It is urged so that it may be in the attitude of being housed.

  As shown in FIG. 8, the contact roller 53 is usually housed inside the fixed base 41 together with the assist connecting plate 149 and faces the assist window 41 </ b> W (see FIG. 2) of the fixed base 41. Then, when the assist connecting plate 149 rotates in the clockwise direction in FIG. 8, as shown in FIG. 10, the tip portion of the retracting arm 149B protrudes forward from the assist window 41W, and the contact roller 53 moves the shoji support frame. 11 abuts against the inner surface 11A.

  In the present embodiment, the assist connecting plate 149 and the contact roller 53 constitute an “assist movable member” according to the present invention.

  This completes the description of the configuration of the present embodiment. Next, the effect of this embodiment is demonstrated. In a state where the shoji 12 is left open and left, the handle 35 is positioned at the neutral position by the torsion spring 52 as shown in FIG. At this time, the control lever 45 (specifically, the contact protrusion 45C) contacts the lever contact piece 43C of the pole 43, and the latch contact piece 43A of the pole 43 rotates the stopper contact piece 42B of the latch 42. It is held at a latch movement allowable position located above the area. As a result, the latch 42 is in a freely rotatable state. Further, as shown in FIG. 15C, the lock state display member 36 connected to the pole 43 (specifically, the pilot protrusion 43B) is located on the upper end side of the up / down stroke, and passes through the lock state determination window 33A. Thus, the lock display part 36B becomes invisible and it can be confirmed that the lock display part 36B is unlocked.

  When a person inside the shoji 12 closes the shoji 12, he puts his hand on the handle 35 and pushes or pulls the shoji 12 toward the closing side. Thereby, as shown in FIG. 6, the handle 35 moves to the closing operation position. At this time, in conjunction with the handle 35, the handle connecting board 151 rotates in the clockwise direction in the figure, and the relay board 46 and the control lever 45 rotate in the counterclockwise direction in the figure. Then, the contact of the control lever 45 with the lever contact piece 43C of the pole 43 is released. However, at this time, since the stopper contact piece 42B of the latch 42 in the disengagement position is abutted against the latch contact piece 43A of the pole 43, the pole 43 is still held at the latch movement allowable position.

  When the shoji 12 is closed and the striker 60 enters the striker receiving groove 41S, the rear engagement pawl 42A2 of the latch 42 is pushed by the striker 60 (specifically, the engaging portion 60A), and the latch 42 is The counterclockwise direction of the drawing rotates to reach the engaging position, and the front engaging claw 42A1 of the latch 42 shields the receiving port side of the striker receiving groove 41S from the striker 60. At this time, the abutting of the stopper abutting piece 42B against the latch abutting piece 43A is released, the pole 43 is rotated by the elastic force of the tension coil spring 44, and the latch abutting piece 43A is placed on the side surface of the stopper abutting piece 42B. Engage. Thereby, the rotation of the latch 42 is prohibited (that is, the latch 42 is fixed), the striker 60 is not detached from the striker receiving groove 41S, and the lock device 120 is locked.

  At this time, as shown in FIG. 15A, the lock state display member 36 connected to the pole 43 is positioned on the lower end side of the up / down stroke and visually recognizes the lock display portion 36B through the lock state determination window 33A. be able to. Thereby, it can confirm that the locking device 120 is locked. Further, when the handle 35 is moved to the closing operation position, the handle connecting plate 151 does not come into contact with the assist connecting plate 149, so that the assist connecting plate 149 is accommodated in the fixed base 41 together with the contact roller 53. Retained.

  When the hand is released from the handle 35 in the locked state, as shown in FIG. 8, the handle 35 returns to the neutral position by the urging force of the torsion spring 52, and accordingly, the handle connecting board 151, the relay board 46, and the control lever. 45 also returns to the neutral position. As a result, the sliding pin 47P2 of the relay board 46 is positioned at the upper end of the oblong hole 47A in the pull-up link 47. Even at this time, the assist connecting panel 149 is held in the neutral position.

  When a person inside the shoji 12 opens the shoji 12, the hand is put on the handle 35 and the shoji 12 is pushed or pulled to the open side. Thereby, as shown in FIG. 9, the handle 35 moves from the neutral position to the opening operation position. At this time, the handle connecting board 151 is rotated in the counterclockwise direction in the figure in conjunction with the handle 35, and the relay board 46 and the control lever 45 are rotated in the clockwise direction in the figure. Then, with the rotation of the relay board 46, the pull-up link 47 pulls the latch abutting piece 43A of the pole 43 upward, and the latch 42 can be rotated.

  The assist connecting board 149 protrudes outward from the assist window 41W in conjunction with the operation of the handle 35 rotating from the neutral position to the opening operation position, and the contact roller 53 provided in the assist connecting board 149 supports the shoji. It contacts the inner surface 11A of the frame 11.

  More specifically, the handle connecting plate 151 is rotated in the counterclockwise direction in the drawing in conjunction with the handle 35, and the cam contact lever 151 B provided on the handle connecting plate 151 is moved in the middle by the cam protrusion of the assist connecting plate 149. It abuts on the piece 149A. Then, the assist connecting board 149 rotates in the clockwise direction of FIG. Abut.

  If the handle | steering-wheel 35 is further rotated toward an opening operation position, as shown in FIG. 10, the retracting arm 149B will protrude further outside, and will push the space between the shoji support frame 11 and the door-toe 12A. Thereby, the load at the time of the initial movement of the shoji 12 is reduced, and the shoji 12 is opened easily. When the shoji 12 is opened, the striker 60 pushes the front engagement claw 42A1 of the latch 42, and the latch 42 moves from the engagement position to the engagement release position.

  Here, when the latch contact piece 43A is pulled up and the pole 43 rotates in the clockwise direction in the figure, the lever contact piece 43C of the pole 43 pushes the control lever 45 from the side, whereby the control lever 45 is moved. The torsion coil spring 54 is rotated in the opposite direction to the relay panel 46 while being elastically deformed. Then, when the handle connection board 151 and the relay board 46 together with the handle 35 reach the opening operation position, the contact between the lever contact piece 43C and the control lever 45 is released as shown in the change in FIGS. The control lever 45 is rotated clockwise by the resilient force of the torsion coil spring 54 and returns to the original state in contact with the relay board 46. When the hand is released from the handle 35 and moves to the neutral position, the control lever 45 returns to the neutral position together with the handle connecting board 151 and the relay board 46, and the pole 43 is held at the latch movement allowable position as shown in FIG. Is done. When the handle connecting board 151 returns to the neutral position, the retracting arm 149B is retracted from the assist window 41W to the inside of the fixed base 41 by the elastic force of the tension coil spring 144, and the assist connecting board 149 is returned to the neutral position.

  Now, when the shoji 12 is outside the shoji 12 and is closed from the outside, the handle 35 does not move to the closing operation position because the handle 35 does not exist on the outward surface of the shoji 12, and the handle 35 does not move. The shoji 12 is closed in a state of being in the neutral position. Further, in the present embodiment, by providing the counter balancer 59, even when the door toe 12A collides with the shoji support frame 11 when the shoji 12 is closed, the handle 35 is rotated to the opening operation position side by the inertial force. It is surely prevented from moving. Thereby, the assist connecting panel 149, the relay panel 46, and the control lever 45 are held in the neutral position together with the handle 35. As shown in FIG. 11, the striker 60 enters the striker receiving groove 41 </ b> S in a state where the pole 43 is held at the latch movement allowable position by the control lever 45. As a result, the latch 42 is not fixed in the engaged position, and even when the shoji 12 is closed, the lock device 120 is not locked, and a lock-out accident is prevented. That is, when the shoji 12 is slid from the outside to the open side, the latch 42 is pushed and rotated by the striker 60 and moves to the disengagement position. At this time, as shown in FIG. 15B, the lock state display member 36 is positioned at the middle position of the up / down stroke, and the lock display portion 36B becomes invisible through the lock state determination window 33A, and the unlocking is performed. It can be confirmed that it is in a state.

  As described above, when the operation of the lock device 120 according to the present embodiment is summarized, when a person inside the shoji 12 puts his hand on the handle 35 and pushes or pulls the shoji 12 to the closing side, the change in FIGS. As shown, the handle 35 is held in the closing operation position, the shoji 12 is closed, and the locking device 120 is locked. Further, when the handle 35 is put on the hand and pushed or pulled toward the opening side of the shoji 12, the handle 35 is held at the opening operation position and the lock device 120 is unlocked, as shown in the changes in FIGS. The shoji 12 opens. At this time, the assist connecting board 149 protrudes toward the shoji support frame 11 and pushes between the shoji support frame 11 and the door rod 12A. When the shoji 12 is closed outside the shoji 12, the handle 35 is not on the outdoor side and is not operated and is held in the neutral position, so that the shoji 12 is closed. As shown in FIG. Is not locked. As described above, according to the configuration of the present embodiment, when the person inside the shoji 12 closes the shoji 12, it is automatically locked, so that the situation of forgetting the lock with the shoji closed is eliminated. The crime prevention property is improved, and when the shoji 12 is closed outside the shoji 12, it is not locked, so that it is possible to prevent a lock-out accident. Moreover, when the shoji 12 is opened, the assist connecting board 149 protrudes toward the shoji support frame 11 and easily opens the shoji 12 by pushing between the shoji support frame 11 and the door rod 12A. Can do.

  Further, in the lock device 120 of the present embodiment, the handle connecting plate 151 and the assist connecting plate 149 are arranged on substantially the same plane while being shifted in the vertical direction of the fixed base 41. Compared with the case where they are stacked in the horizontal axis J1 direction, the thickness dimension of the lock device main body 140 in the horizontal axis J1 direction can be reduced (flattened). Thereby, while ensuring the clearance gap SP1 (refer FIG. 16) in which a hand can be inserted between the handle | steering-wheel 35 and the locking device main body 140, appearance can be improved.

[Second Embodiment]
The lock device 120V of this embodiment is shown in FIGS. 17 to 25, and is a handle lock operation member for switching between a handle lock state in which the rotation of the handle 35 is restricted and a handle lock release state in which the restriction is released. The point provided with 161 differs from the first embodiment. Hereinafter, only the configuration different from that of the first embodiment will be described, and the same configuration will be denoted by the same reference numerals as those of the first embodiment, and redundant description will be omitted.

  As shown in FIG. 17, the handle lock operating member 161 is provided at a position near the upper end of the fixed base 41. In addition, a vertically long rectangular operation window 41H is formed at a position closer to the upper end of the main body cover 41A, and an operation knob 161F of the handle lock operation member 161 protrudes from the operation window 41H. Then, when the operation knob 161F moves the sub operation member 161 to the handle lock position arranged at the upper end of the operation window 41H, the rotation from the neutral position of the handle 35 to the open operation position is restricted. On the other hand, when the operation knob 161F moves the sub operation member 161 to the handle lock release position arranged at the lower end of the operation window 41H, the restriction is released and the handle 35 is rotated from the neutral position to the open operation position. Will be able to.

  Specifically, as shown in FIG. 22, the handle lock operating member 161 has a rectangular slide plate 161C extending in the vertical direction, and the operation knob 161F protrudes from an intermediate portion in the vertical direction of the slide plate 161C. Yes. In addition, the slide plate 161C is colored or displayed in a different color in the upper part and the lower part from the operation knob 161F. Then, depending on whether the handle lock operation member 161 is disposed at the handle lock position or the handle lock release position, the color or the wording display of the slide plate 161C visible through the operation window 41H changes, and the handle lock operation member It is possible to easily determine at which position 161 is arranged.

  Flexible pieces 161D and 161D protrude from the upper and lower edges of the slide plate 161C, respectively. These flexible pieces 161D and 161D are arranged at the end (the right end in FIG. 22) of the slide plate 161C on the side close to the shoji support frame 11 (see FIG. 18), and the flexible pieces 161D and 161D. Locking protrusions 161E and 161E are formed on the rear surface so as to protrude in the direction opposite to the operation knob 161F.

  An intermediate support member 161G is provided in a portion of the back surface of the slide plate 161C located on the back side of the operation knob 161F. The intermediate support member 161G has a prismatic shape extending in the width direction of the slide plate 161C. One end of the intermediate support member 161G protrudes toward the slide plate 161C in a stepped manner and is continuous with the back surface of the slide plate 161C. On the other hand, the other end of the intermediate support member 161G protrudes toward the shoji support frame 11 from the slide plate 161C. Further, gaps are formed between the slide plate 161C and the intermediate support member 161G so as to open toward the upper and lower sides and the shoji support frame 11 side. A prism-shaped support column 161H is integrally formed and extends downward in a range from the intermediate portion to the tip portion in the longitudinal direction of the intermediate support member 161G, and is opposite to the slide plate 161C from the lower end portion of the support column 161H. A rotation interference part 161A is formed to project toward the side. Further, a rectangular guide protrusion 161B is formed to protrude from the tip surface of the rotation interference part 161A.

  As shown in FIG. 23, the support base 41B of the fixed base 41 is formed with a guide groove 163 that accommodates the guide protrusion 161B of the handle lock operating member 161 so as to be linearly movable. Here, also in the present embodiment, when the shoji support frame 11 (see FIG. 18) side of the support base 41B is referred to as a front side, the guide groove 163 extends in the vertical direction along the front edge of the support base 41B. It extends to. The upper end portion of the guide groove 163 is positioned on the front side of the intermediate portion in the vertical direction of the retractable arm 149B in a state where the handle 35 is disposed at the neutral position, and the lower end portion of the guide groove 163 is the assist connecting plate 149V. Is located in front of the center of rotation.

  As shown in FIG. 24, an opposing support wall 41G is provided inside the main body cover 41A of the fixed base 41 and is opposed to the support base 41B with an assist connecting board 149V interposed therebetween. The handle lock operating member 161 is assembled with the opposing support wall 41G sandwiched between the slide plate 161C and the intermediate support member 161G. In addition, as shown in FIG. 25, the opposing support wall 41G is provided with a pair of locking recesses 41E and 41F arranged vertically corresponding to each locking projection 161E. When the handle lock operating member 161 is disposed at the handle lock position as shown in FIG. 25 (C), each locking projection 161E engages with the upper locking recess 41F, while on the other hand, as shown in FIG. 25 (A). When the handle lock operating member 161 is disposed at the handle lock release position, each locking projection 161E engages with the lower locking recess 41E. Further, as shown in FIG. 25B, when the handle lock operating member 161 is moved between the handle lock position and the handle lock release position, the flexible piece 161D bends and the locking projection 161E becomes the locking recess 41E. , 41F. Thereby, the handle lock operation member 161 can be held at the handle lock position or the handle lock release position, and a sense of moderation can be given to the operation of the handle lock operation member 161.

  As shown in FIG. 19, in the state where the handle 35 is disposed at the neutral position, the front surface facing the shoji support frame 11 side of the retracting arm 149B in the assist connecting panel 149V is forward from the middle portion in the vertical direction. A lock contact protrusion 160A is formed to protrude. As shown in FIG. 20, with the handle lock operation member 161 disposed at the handle lock position, the rotation interference portion 161A of the handle lock operation member 161 is disposed in front of the lock contact protrusion 160A. As a result, the turning arm 149B of the assist connecting board 149V is restricted from rotating toward the shoji support frame 11, and as a result, the handle 35 is also restricted from turning from the neutral position to the opening operation position. In other words, when the handle lock operating member 161 is disposed at the handle lock position, the handle 35 cannot be rotated to the close operation position.

  On the other hand, as shown in FIG. 19, in the state in which the handle lock operation member 161 is disposed at the handle lock release position, the rotation interference portion 161A of the handle lock operation member 161 is disposed near the rotation center of the cam protrusion 149A. Is done. Thereby, the rotation of the retractable arm 149B to the side of the shoji support frame 11 is permitted, and the rotation of the handle 35 to the opening operation position is also permitted.

  When the retracting arm 149B rotates to the side of the shoji support frame 11, the lock contact protrusion 160A of the retracting arm 149B causes a gap between the support column 161H and the support base 41B shown in FIG. 23 of the handle lock operating member 161. As shown in FIG. 21, a part of the rotation interference portion 161A is accommodated in the curved concave portion 160B formed by the base end portion of the protruding and retracting arm 149B and the lock contact projection 160A. Interference between the panel 149V and the handle lock operating member 161 is avoided. Thereby, the retractable arm 149B can be rotated to the end position of the rotatable range.

  In this embodiment, the torsion coil spring 162 shown in FIG. 19 is provided instead of the tension coil spring 144 (see FIG. 5) of the first embodiment, and the torsion coil spring 162 assists and connects in the same manner as the tension coil spring 144. The board 149V is urged in the counterclockwise direction in FIG.

  According to the configuration of the present embodiment described above, when the handle lock operation member 161 is disposed at the handle lock position, the handle 35 is rotated from the neutral position to the open operation position due to interference between the handle lock operation member 161 and the assist connecting board 149V. Is restricted from moving. In order to open the shoji 12 from this state, it is necessary to turn the handle 35 to the opening operation position after moving the handle lock operating member 161 to the handle unlocking position. And security is improved.

  In order to lock the handle 35 by the handle lock operating member 161 with the lock device 120V locked, the handle 35 is operated to close the shoji 12 and then the handle lock operating member 161 is moved to the handle lock position. Alternatively, the shoji 12 may be closed by operating the handle 35 after the handle lock operating member 161 is arranged in the handle lock position in a state where the shoji 12 is opened.

[Third Embodiment]
This embodiment is shown in FIGS. 26 to 28, and is mainly different in that a handle lock operation member 170 is provided instead of the handle lock operation member 161 of the second embodiment. Specifically, as shown in FIG. 27, the handle lock operating member 170 of the present embodiment is disposed above the assist coupling board 149 and is rotatably supported by the fixed base 41. The handle lock operating member 170 is provided with a positioning rotation piece 170A and an interference rotation piece 170B protruding in different directions from the rotation center. Further, the support base 41B is provided with a stopper projection 171 that stands up toward the rotation regions of the positioning rotation piece 170A and the interference rotation piece 170B. As shown in FIG. 27, the handle lock operating member 170 includes a handle lock release position where the interference turning piece 170B comes into contact with the stopper protrusion 171 from the left side of the drawing, and a positioning turning piece 170A on the right side of the drawing. Rotate between the handle lock position and the contacted position.

  According to the configuration of the present embodiment, it is possible to switch between the state where the handle 35 is locked and the state where the lock is released as follows. That is, when the handle lock operating member 170 is placed at the handle lock position with the handle 35 placed at the neutral position as shown in FIG. 28, the interference turning piece 170B is placed within the turning area of the retractable arm 149B. Thus, the tip of the interference turning piece 170B is brought into contact with the tip surface of the projecting arm 149B. Thereby, the rotation of the retractable arm 149B toward the side of the shoji support frame 11 is restricted, and as a result, the rotation of the handle 35 from the neutral position to the opening operation position is also restricted. That is, when the handle lock operating member 170 is disposed at the handle lock position, the handle 35 is locked.

  On the other hand, as shown in FIG. 27, in the state in which the handle lock operating member 170 is arranged at the handle lock release position, the interference turning piece 170B is arranged outside the turning area of the raising / lowering arm 149B. Rotation toward the shoji support frame 11 is allowed, and the lock of the handle 35 is released.

  A circular operation window 172 is formed at the upper end of the main body cover 41A as shown in FIG. 26, and the operation knob 170C provided to the handle lock operation member 170 is operated to rotate within the operation window 172. Can be done. Further, the handle lock operating member 170 can be held at the handle lock position or the handle lock release position by an elastic member such as a spring (not shown), and can have a sense of moderation when the operation knob 170C is operated.

[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) The shoji unit 10 of the above embodiment has a so-called sliding door structure in which a pair of shojis 12 and 12 slide so as to pass each other. The present invention may be applied to a so-called double sliding door structure shoji unit that is opened or a so-called single sliding door structure shoji unit that includes only one shoji. In the sliding door structure of the double sliding door structure, a lock device may be provided on the door toe of one of the shojis, and a striker may be provided on the door toe of the other shoji. In this case, with respect to one shoji, the other shoji corresponds to the “joining partner of shoji” according to the present invention.

  (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.

  (3) In the above embodiment, the counter balancer 59 is provided inside the lock device main body 140. However, for example, the entire handle is made of resin, and the metal block as the counter balancer according to the present invention is a part of the handle. It may be a structure fixed to.

  (4) Although the word indicating “locked state” is displayed on the lock display portion 36B in the embodiment, a symbol indicating the locked state may be displayed on the lock display portion.

Front view of a shoji unit according to an embodiment of the present invention Perspective view of lock device and door toe Strike perspective view Front view of the lock device with the shoji open Front sectional view of the locking device with the shoji open Front sectional view of the locking device in the process of moving the handle to the closing position Front sectional view of the locking device with the handle in the closed operation position Front sectional view of the locking device in the locked state Front sectional view of the locking device in the process of moving the handle to the open operation position Front sectional view of the locking device with the handle in the open operation position Flat cross-sectional view of a door-tower with the shoji closed in an unlocked state Perspective view of fixed base with body cover removed Perspective view of relay panel and control lever Lock state display member and pole perspective view (A) Partial front view of the locking device in the locked state, (B) Partial front view of the locking device in the unlocked state, (C) Partial front view of the locking device in the unlocked state Side sectional view of the locking device The perspective view of the locking device of the second embodiment and the door toe Front view of the lock device with the shoji open Front sectional view of the locking device in the locked state Front sectional view of the locking device with the handle locked Front sectional view of the locking device with the handle in the open operation position Perspective view of handle lock operating member Perspective view of fixed base with body cover removed Side sectional view of the locking device (A) Side sectional view of the handle lock operating member arranged at the handle lock releasing position, (B) Side sectional view of the handle lock operating member arranged between the handle lock position and the handle lock releasing position, (C) Side sectional view of the handle lock operating member arranged at the handle lock position The perspective view of the locking device of 3rd Embodiment Front sectional view of the locking device with the handle unlocked Front sectional view of the locking device with the handle locked

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Shoji support frame 12 Shoji 12A Door end rod 33A Lock state discrimination window 35 Handle 36 Lock state display member 41 Fixed base 41A Main body cover 41W Assist window 42 Latch 42B Stopper contact piece (pole movement restriction part)
43 Pole 43A Latch contact piece (Pole movement restriction part)
44 Tension coil spring (pole biasing means)
45 Control lever (control member)
46 Relay panel (control member)
47 Pull-up link 49P2 Connecting pin 50 Engaging groove 52 Torsion spring 53 Contact roller (assist movable member)
54 Torsion coil spring (control member)
59 Counter balancer 60 Strike 120 Locking device 140 Locking device body 149, 149V Assist connection panel (assist movable member)
149A Cam protrusion (first protrusion)
149B Intrusion arm (second protrusion)
151 Handle connection board 160A Lock contact protrusion 161,170 Handle lock operation member 161A Rotation interference part J1 Horizontal axis

Claims (7)

A locking device that is attached to a shoji door toe and is locked by engaging a striker fixed to a shoji support frame,
A handle with a lever structure extending in the vertical direction is provided inside the shoji,
The handle rotates about a horizontal axis perpendicular to the sliding direction of the shoji, and moves between an opening operation position inclined toward the opening side of the shoji and a closing operation position inclined toward the closing side of the shoji. And is always biased to be placed in a neutral position between the opening operation position and the closing operation position,
The door is unlocked on the condition that the shoji is opened by holding the handle in the open operation position, while the door is unlocked on the condition that the shoji is closed by holding the handle in the closing operation position. As well as
A handle connecting board that rotates integrally with the handle;
An assist movable member that protrudes toward the shoji support frame as the handle rotates from the neutral position to the opening operation position and pushes between the shoji support frame and the door toe. ,
The assist movable member is pivotally supported around a horizontal axis perpendicular to the sliding direction of the shoji, and has a first protrusion and a second protrusion that protrude in opposite directions across the rotation center. And the first protrusion is urged so as to protrude into the rotation area of the handle connecting board,
In the middle of the handle from the neutral position to the opening operation position, the first protrusion is pushed by the handle connecting plate to rotate the assist movable member, and the second protrusion is directed to the shoji support frame. A locking device characterized by being configured to protrude. A latch that moves between an engagement position that engages with the striker and an engagement release position that releases the engagement;
A pawl movable between a latch movement allowing position for allowing movement of the latch and a latch lock position for holding the latch in the engagement position;
When the latch is moved from the disengagement position to the engagement position with the handle being in the neutral position, the pawl is held in the latch movement allowable position, and the handle is in the close operation position. In this state, when the latch moves from the disengagement position to the engagement position, the pawl moves to the latch lock position, and the handle moves from the neutral position to the opening operation position. The lock device according to claim 1, further comprising a pole moving mechanism that moves the pawl from the latch lock position to the latch movement allowable position in conjunction with the pawl. The pawl moving mechanism is provided on the latch and the pawl, and prohibits the pawl from moving to the latch lock position by abutting each other when the latch is in a position other than the engagement position. A pole movement restricting portion that allows the pawl to move to the latch lock position when the latch is located at the engagement position;
Pole biasing means for biasing the pole to the latch lock position;
Provided between the handle and the pole, and when the handle is located in the neutral position, the latch moves the pole against the biasing force of the pole biasing means by engaging the pole. When the handle is positioned at the closing operation position, the pawl is moved to the latch lock position by the biasing force of the pole biasing means by releasing the engagement with the pole when the handle is positioned at the closing operation position. The locking device according to claim 2, further comprising an allowable control member. A main body cover that covers an outer surface of the main body other than the handle of the locking device;
A lock state determination window formed on the body cover;
A lock state display member that is partly visible through the lock state determination window and that has a different color depending on the position of the pole. The locking device according to claim 2 or 3, characterized in that   2. A counter balancer is provided to prevent the handle from moving from the neutral position to the closing operation position due to an inertia force when the shoji is closed without operating the handle. 5. The locking device according to any one of 4 to 4.   The assist movable member is provided so as to be movable between a handle lock position within the rotation area of the assist movable member and a handle lock release position outside the rotation area, and is disposed at the handle lock position. A handle that restricts the handle from rotating from the neutral position to the opening operation position by interfering with the handle, and allows the assist movable member and the handle to rotate when disposed at the handle lock release position. The lock device according to claim 1, further comprising a lock operation member. With the handle disposed in the neutral position, the front surface of the second projecting portion of the assist movable member facing the shoji support frame is forwardly locked from the middle in the vertical direction. Is formed protruding,
The handle lock operating member is provided so as to be movable up and down, and is disposed in front of the lock contact projection at the handle lock position, while the assist movable member is rotated from the handle lock position at the handle lock release position. The lock device according to claim 6, further comprising a rotation interference unit arranged on the moving center side.