JP3774214B2 - Latching lock device - Google Patents

Description

  The present invention attaches to doors such as sliding doors, hinged doors, and folding doors, and when closing the door, the latch protrudes and the door returns automatically to lock and lock, while when opening, the latch retracts to unlock. The present invention relates to a latching lock device.

  This type of latching lock device is, for example, as shown in the conventional example attached to a sliding door in FIGS. 21 (A1) and (A2) and to a sliding door (or folding door) in FIGS. 21 (B1) and (B2). The fixed cylinder 3 is embedded in the top end of the door 2 and the latch 4 is spring-biased in the upward protruding direction with the tapered surfaces 4a and 4b provided on the head facing the predetermined direction. It is provided so that it can appear and disappear. On the other hand, although not shown in the drawings, a rotation operation member such as a lever or a knob for retracting the latch 4 is externally attached to the handle positions of the doors 1 and 2, and the rotation operation member is coaxially arranged with the door 1. 2 is connected to the latch 4 and the wire 5 via a connecting member provided in the interior. When the doors 1 and 2 are closed, if the tapered surfaces 4a and 4b of the latch 4 come into contact with the stopper 6 fixed to the door support means side, the latch 4 resists the spring biasing force along the tapered surfaces 4a and 4b. Once retracted, it projects again as shown by the chain line and engages with the stopper 6 to lock the door by restricting the return of the door. When opening, the latch 4 is retracted into the fixed barrel 3 by rotating the rotating operation member and pulling down the wire 5, thereby allowing the doors 1 and 2 to move to the open position.

  However, in the case of a conventional latching lock device, when the door is a sliding door, when it is incorporated and used, and when it is a hinged door or a folding door, when it is incorporated and used, the manner of opening and closing operations is different, so that it is illustrated. Since it is necessary to change the direction of the taper surfaces 4a and 4b of the latch 4, it is necessary to make two types of latches, one for sliding doors and one for sliding doors or folding doors. there were.

  Furthermore, the conventional latching lock device has a structure in which the latch 4 and the wire 5 stretched between the rotation operation members are installed in the door body of the door. Even if it was necessary to remove the slack of 5, it was extremely difficult to adjust the degree of tension of the wire 5. For this reason, the latching operation of moving the latch 4 in and out becomes unstable, and as a result, there is a problem that a malfunction is likely to occur in the door opening / closing operation.

Therefore, in order to solve the above-described problem, the invention described in claim 1 includes a latch 19 having a polygonal cross section having a tapered surface 19a at the head, as shown in the embodiment shown below, and a sliding door A or folding door. Lock means r1 and r1 ′ provided in a fixed cylinder 15 embedded in the upper end of the door, such as B, in the upward protruding direction so as to protrude and retract from the latch protrusion 14, and the latch 19; Unlocking means r2 and r2 'having a rotation operation member such as a rotation operation lever 30 connected by a wire 25 via a connection member such as a connection ring 35 embedded in the handle position of the door. When the door is closed, when the tapered surface 19a of the latch 19 comes into contact with the stoppers 13 and 13 'fixed to the door support means side such as the guide rail 10, it is once retracted against the spring biasing force, again While being released and engaged with the stoppers 13 and 13 'to restrict the return of the door, when opening, the turning operation member is turned to pull down the wire 25 to retract the latch 19 to return the door. In the latching lock device R · R ′ for releasing the restriction, the locking means r 1 / r 1 ′ is formed in a square pipe shape in accordance with the cross-sectional shape of the latch 19, and is a polygonal hole portion provided on the upper end side of the fixed cylinder 15. The latch 19 is fitted into the seat 20a so as to be freely inserted and removed, and the latch 19 is fitted in a rotation-restricted state, and the female screw hole 19b formed in the lower portion of the latch 19 is screwed to adjust the screwing amount. capable while providing the upper end of the screw portion 16c which connects to the latch 19, and connecting the wires 25 to the lower end, and a connecting angle bar 16 interpolate vertically movable transmural respect to the fixed cylinder 15, the detent When the member 18 is extracted from the fixed cylinder 15, the rotation restriction state of the latch 19 is released, and when the latch 19 is screwed onto the connecting square bar 16 to adjust the screwing amount, the screwing amount is reduced. depending tension of the wire 25 is characterized Rukoto such are adjusted.

  The invention according to claim 2 is the latching lock device according to claim 1, for example, as shown in the embodiment shown below, and is rotatably attached to the locking means r 1 ′ on the fixed cylinder 15. The shutter 50 is normally spring-biased to the latch protrusion restricting position, and the shutter 50 is opened at a position shifted from the latch protrusion 14 of the detent member 18 when it is in the latch protrusion restricting position. The guide hole 50c is configured to be in contact with the door support means such as the guide rail 40 when the door is closed, so that the guide hole 50c opens at a latch protrusion restriction release position communicating with the latch protrusion opening 14. It has the positioning protrusion 50b to guide.

  According to the latching lock device of the first aspect, (1) when incorporated in a door having different opening / closing operation modes, the direction of the latch is changed according to the door opening / closing operation modes, and the tapered surface is fixed to the door support means. Since it is only necessary to insert the latch into the fixed cylinder from the latch projection opening in accordance with the direction opposite to the stopper of the door, even for doors with different opening / closing operation modes such as between sliding doors and hinged doors or folding doors, It is possible to use the same latching lock device as it is without having to make a separate dedicated one corresponding to each, and to use it as a result. As a result, there is no need to separately manufacture a dedicated device, and dramatically Cost can be reduced. (2) When the wire is installed in a door and the wire is not sufficiently stretched between the connecting square bar and the connecting member and is in a slack state, or on the contrary, it is in a tightly stretched state more than necessary. By removing the rotation prevention member from the fixed cylinder and releasing the latch rotation restriction, the tension of the wire can be adjusted easily by adjusting the screwing amount by screwing the latch against the connecting square rod from the outside. Therefore, it is possible to always stabilize the latching operation for raising and lowering the latch. In addition, by adjusting the screwing amount by turning the latch by the same operation, the contact height position of the taper surface of the latch with respect to the stopper can be easily finely adjusted. The taper surface can always be brought into contact with the stopper at an appropriate position, and this can also stabilize the latching operation. As a result, there is an advantage that a smooth opening / closing operation of the door can be obtained without any trouble.

  According to the latching lock device of the second aspect, in the operation other than the time of locking / unlocking which requires the latching operation of the latch, the shutter is moved to the latch protrusion regulating position where the guide hole is opened at the position shifted from the latch protrusion. Holding the bias and restricting the protrusion of the latch with the shutter, this prevents the protruding latch from being exposed to the minimum and prevents the appearance around the door from deteriorating due to the protruding protrusion. And aesthetics can be improved. Further, the protruding latch can be prevented from hitting other peripheral members, thereby protecting the structural parts of the lock device including the latch and preventing the peripheral other members from being damaged. Can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The present invention uses the same latching lock device as it is, without recombining the doors with different opening / closing operation modes, such as between a sliding door and a hinged door or a folding door, without separately changing the corresponding dedicated ones. The object is achieved by making the configuration that only changes the direction of the latch. In addition, the purpose of adjusting the tension of the wire embedded in the door to stabilize the latching operation of moving the latch in and out is always stable, and the amount of screwing can be easily adjusted by screwing the latch from the outside to the connecting square bar. It was realized by making it a good structure.

  1 to 3 show an example of a latching lock device according to the present invention, and FIGS. 4 and 5 show a sliding door structure to which the latching lock device is incorporated and applied.

  As shown in FIGS. 4 and 5, the sliding door structure is configured to engage a pair of door pulleys 11 and 12 in a freely rolling manner with a grooved traveling path 10a of a guide rail 10 having a substantially L-shaped cross section fixed to the upper portion of the wall. Thus, the sliding door A is suspended and slidably assembled in the opening / closing direction X. An L plate-shaped metal stopper 13 is attached to a lower end surface of the guide rail 10 at a predetermined locking / unlocking position near the door end, and other pieces are suspended. The sliding door A in the illustrated example is made of wood and includes a door having a hollow in a rectangular frame.

  On the door end side of this sliding door A, a latching lock device indicated by the general symbol R is incorporated. The latching lock device R includes a lock unit r1 incorporated in the upper end portion and a lock release unit r2 incorporated in a handle position at a substantially middle height position.

  As shown in FIGS. 1 to 3, the lock unit r <b> 1 includes a fixed cylinder 15, a connecting square bar 16, a latch urging spring 17, a rotation preventing member 18, and a latch 19 that are provided in the fixed cylinder 15.

  The fixed cylinder 15 is integrally formed of, for example, resin, and the mounting plate portion 21 is provided on the cylindrical portion 20 of the main body in a direction orthogonal to the cylindrical portion 20. The cylindrical portion 20 is formed with a polygonal hole portion 20a having a deformed rectangular cross section on the upper end side near the mounting plate portion 21, and a rectangular insertion hole 20b is formed at the lower end in the opposite figure. The mounting plate portion 21 has a longitudinal hook shape with screw insertion holes on both ends, a polygonal hole portion 20a is opened at the center, and an extraction recess 21a having a gradient at a symmetrical position with the opening interposed therebetween is provided. Yes. The connecting square bar 16 is made of resin and has a shaft body 16a having a square cross section. In the figure, a wire through hole 16b is provided at the lower end, and an external thread is cut on the outer periphery of the upper end to form a threaded portion 16c. The latch biasing spring 17 is composed of a compression coil spring.

  The anti-rotation member 18 is also made of resin, has a through-type square pipe shape in accordance with the cross-sectional shape of the latch 19, has a latch protrusion 14 formed in the upper opening in the figure, and the latch protrusion 14 is interposed therebetween. An extraction knob 18a is provided in a protruding manner at a symmetrical position. The latch 19 is made of metal, and the main body has a rectangular shape with a deformed cross section. The head is formed with a tapered surface 19a, while the female screw corresponding to the screw portion 16c of the connecting square bar 16 is formed in the lower portion in the axial direction from the end surface. A hole 19b is formed.

  On the other hand, the lock release means r2 includes a rotation operation lever (rotation operation member) 30, a regulation disk 31 that regulates a rotation angle range of the rotation operation lever 30, a mounting disk 32, and a lever biasing force. The spring 33, the attachment shaft 34, the connection ring (connection member) 35 of the wire 25, and the opener 36 that displays the open / closed state of the sliding door A are provided.

  The rotation operation lever 30 protrudes from one end of the main body handle portion 30a with a rotation shaft portion 30c having a square hole 30b corresponding to the mounting shaft 34 in the axial direction. The restricting disc 31 is provided with a fan-shaped dent that is opened approximately 90 degrees on one side, and a rotation restricting step portion that defines a rotation angle range of the rotation operation lever 30 corresponding to the vertical movement stroke of the latch 19 there. 31a is formed. The attachment disc 32 is a metal plate, and is provided with a spring insertion portion 32b on one side sandwiching the center hole 32a and a pair of spring hook portions 32c on the other side by cutting and raising a part of the plate portion. . Further, the mounting disk 32 is provided with screw insertion holes 32d on both sides with the center hole 32a interposed therebetween. The lever urging spring 33 is formed in a substantially rectangular shape in a natural state, and is formed with a hook 33a by bending both end edges outward. The mounting shaft 34 is a metal square shaft having a quadrangular cross section, and a spring hook groove 34b is formed in a square ring shape along the outer periphery near the intermediate annular portion 34a that is one step thick.

  The connection ring 35 is made of a resin and has a wheel shape. A connection shaft portion 35a having a square hole corresponding to the mounting shaft 34 is provided at the center of rotation, and the connection ring 35 is circumferentially positioned at a symmetrical position with the connection shaft portion 35a interposed therebetween. An arc-shaped escape hole 35b is provided on the surface. Moreover, a peripheral edge is partially formed in a convex shape, and a wire through hole 35c is provided there. The opener 36 has a fixed plate 37 having a colored portion that displays the open / closed state of the sliding door A, for example, in two colors of red and blue, and a fan-shaped notch window at a position corresponding to the colored portion. And plate 38. On the fixed plate 37, a stud 39 having a female screw hole on the inner periphery is set up and fixed. The rotating plate 38 is provided with a connecting shaft portion 38a having a square hole corresponding to the mounting shaft 34 at the center of rotation on one side, and the connecting shaft portion 38a is fitted in a central round hole 37a so as to be rotatable with respect to the fixed plate 37. ing.

  Therefore, in the latching lock device R, the locking means r1 fits the take-out knob 18a into the take-out recess 21a, and fits the rotation-preventing member 18 into the polygonal hole 20a of the fixed cylinder 15 so as to be freely inserted and removed. On the other hand, the threaded portion 16c of the connecting square bar 16 is screwed and connected to the female screw hole 19b of the latch 19, and the latch biasing spring 17 is wound around the lower end portion thereof, and then the connecting square bar 16 is prevented from rotating. The member 18 is inserted into the fixed cylinder 15 through the latch protrusion 14, and the lower end of the square bar is inserted through the insertion hole 20 b and protruded. Then, the wire 25 is connected through one end to the wire through hole 16b of the protruding connecting rod 16 while the other end is connected through the wire through hole 35c to connect the connection ring 35, and the connection ring 35 is suspended. As a result, the locking means r1 is assembled.

  Then, the cylindrical portion 20 of the fixed cylinder 15 is fitted into the mounting vertical hole while the connecting ring 35 is put in a vertical hole (not shown) drilled in advance near the top end of the sliding door A and attached. The plate portion 21 is assembled to the upper end surface of the sliding door A by screwing. At this time, the wire 25 has a connecting square bar so that the connecting ring 35 suspended in the hollow portion of the sliding door A has a wire length that can be viewed from a horizontal hole for mounting (not shown) drilled at the handle position of the sliding door A. 16 and the connecting ring 35.

  On the other hand, the unlocking means r2 fits one end shaft portion of the attachment shaft 34 into the square hole of the connection shaft portion 35a of the connection ring 35, and passes the stud 37 through the escape hole 35b while the connection shaft portion 38a of the opener 36 Fit into the square hole and assemble these opener side parts. Then, on the opener side of one side of the sliding door, with the opener 36 applied to the peripheral edge of the mounting side hole, other opener side parts are disposed in the mounting side hole, while the other end shaft of the mounting shaft 34 The part is passed through the center hole 32a of the mounting disc 32, and the set screw 48 is screwed into the stud 39 from the operation side on the other side of the sliding door to fix the mounting disc 32 to the other side plate surface of the sliding door A. The mounting disc 32 and the opener side parts are fastened with the gap therebetween. Further, the other end shaft portion of the attachment shaft 34 is passed through the center hole of the regulation disc 31 and is fitted into the square hole 30b of the rotation shaft portion 30c of the rotation operation lever 30 to connect the rotation operation lever 30; The restriction disc 31 is fixed to the attachment disc 32 with screws 49. Thus, within the allowable rotation range of the rotation restricting step portion 31 a of the restricting disc 31, the rotation operation lever 30 can be rotated integrally with the connecting ring 35 and the rotating plate 38 of the opener 36 via the mounting shaft 34. And the unlocking means r2 is assembled.

  Therefore, in the latching lock device R, when the turning operation lever 30 is turned in one direction counterclockwise in the figure, the wire 25 is raised according to the rotation of the connecting ring 35 and the latch urging spring 17 in the fixed cylinder 15 is attached. The latch 19 protrudes by the force, and the rotating plate 38 of the opener 36 also rotates to indicate the closed state of the sliding door A. On the other hand, when the rotation operation lever 30 is rotated in the other direction of the clock in the drawing, the wire 25 descends against the latch urging spring 17 according to the reverse rotation of the connecting ring 35, the latch 19 is retracted, and the opener 36 The rotating plate 38 also rotates in the reverse direction to display the open state of the sliding door A. In this way, the latch 19 is fixed through the locking member 18 so as to be able to protrude and retract from the latch protruding opening 14 into the locking position protruding from the fixed cylinder 15 and the unlocking position retracted according to the rotation operation of the rotation operation lever 30. It is held in the cylinder 15.

  As shown by the chain line in FIG. 1, the lock release means r2 pushes and narrows the lever biasing spring 33 into an elongated U shape so that the hooks 33a at both ends are hooked on the spring hooks 32c. On the other hand, the intermediate bent portion 33b is inserted into the spring insertion portion 32b, and is attached to the spring engaging groove 34b with the attachment shaft 34 sandwiched therebetween. As a result, when the revolving lever 30 is reciprocally rotated, a click feeling is obtained by the spring force, and when the lever is rotated to the locking position and when it is rotated to the opposite unlocking position, The rotation operation lever 30 is held by a spring force at the lock position.

  Now, when closing the sliding door A provided with the latching lock device R, the rotation operation lever 30 of the unlocking means r2 is previously rotated to the locking position as shown in FIGS. Put it in a state. Then, the sliding door A is slid in the closing direction by the guide rail 10, and when the tapered surface 19 a of the latch 19 abuts against the stopper 13 as shown in FIG. 6, the latch 19 is latched along the tapered surface 19. As shown in FIG. 7, it retracts once against the spring 17 and protrudes again when it exceeds the stopper 13, engages with the stopper 13 to restrict the return of the sliding door A, and locks the sliding door A. The sliding door A closes by hitting a door not shown.

  Thereafter, when the sliding door A is opened, the turning operation lever 30 is turned to the unlocking position as shown in FIG. Then, the wire 25 descends in accordance with the reverse rotation of the connecting ring 35, and the latch 19 is retracted into the fixed cylinder 15 as shown in FIGS. 9 and 10 against the latch biasing spring 17, and unlocked. The return restriction of the sliding door A is canceled and the movement to the open position is possible.

  By the way, in the example of illustration mentioned above, it was the case where the latching lock apparatus R was applied by incorporating it into the sliding door A whose opening and closing operation is linear motion. However, according to the present invention, the same latching lock device R is incorporated and used as it is, as described below, for the hinged doors or folding doors whose opening / closing operation involves a rotational motion, without recombining them separately. be able to.

  That is, when the latching lock device R is used as it is by being incorporated in a hinged door or a folding door, the direction of the latch 19 is changed from that in the case of the sliding door A when the lock means r1 is assembled, that is, as shown in FIG. It is only necessary to insert the latch 19 into the fixed cylinder 15 from the latch projection port 14 of the anti-rotation member 18 so that the surface 19a faces the stopper 13 'fixed to the door support means of the hinged door or the folding door.

  Further, in the latching lock device R, when incorporated in the sliding door A, the hinged door, or the folding door, the wire 25 is not sufficiently stretched between the connecting square bar 16 and the connecting ring 35, or is in a slack state or necessary on the contrary. When it is in a tightly stretched state as described above, a finger is placed on the take-out knob 18a from the take-out recess 21a, and the detent member 18 is removed from the fixed cylinder 15 to release the rotation restriction of the latch 19. Then, the tension of the wire 25 is adjusted by adjusting the screwing amount by screwing the latch 19 to the connecting square bar 16. As a result, the latching operation for raising and lowering the latch 19 can always be stabilized. Further, by adjusting the screwing amount by screwing the latch 19 by the same operation, the contact height position of the tapered surface 19a of the latch 19 with respect to the stoppers 13 and 13 'can be finely adjusted. As a result, when the door is opened and closed, the tapered surface 19a of the latch 19 can always be brought into contact with the stoppers 13 and 13 'at an appropriate position, and as a result, the latching operation can be stabilized similarly.

  In the illustrated example described above, the unlocking means r2 is provided with the lever biasing spring 33, and when the rotation operation lever 30 is rotated to the locked position or the unlocked position, the spring is biased at each position. Although the holding structure is adopted, in the present invention, such a lever biasing spring may not be provided. In that case, when the sliding door A is closed, the latch 19 is in a projecting state from the latch projecting opening 14 from the beginning due to the biasing force of the latch biasing spring 17 in the fixed cylinder 15. On the other hand, when opening, the turning operation lever 30 is turned to the unlocking position, the latch 19 is retracted into the fixed cylinder 15 against the latch biasing spring 17, and the latch 19 is unlocked. If the hand is released from the turning operation lever 30, the latch 19 can be automatically returned to the protruding state by the biasing force of the latch biasing spring 17.

  Next, another embodiment of the present invention will be described. FIG. 12 shows a folding door structure incorporating and applying another example of a latching lock device R ′ according to the present invention.

  The folding door structure is configured such that a horizontally supported pivot is engaged with a grooved traveling path 41 of a guide rail 40 fixed to an upper portion of a wall body, and a folding door B is assembled to be freely opened and closed in an opening / closing direction. Yes. The folding door B includes two long and short wooden folding door panels 42 and 43, which are connected to each other with a long resin hinge 44 made of a resin so that the folding door B can be folded.

  In this folding door B, a latching lock device R ′ is incorporated in the folding door panel 42 on the door end side. The latching lock device R ′ includes a lock unit r1 ′ incorporated in the upper end portion and a lock release unit r2 ′ incorporated in the handle position near the door end of the folding door panel 42. Since the locking unit r1 ′ includes a shutter mechanism, which will be described later, indicated by a reference numeral 45 in the drawing, the rest of the structure is the same as that of the locking unit r1 of the first embodiment except for components and parts related thereto. Further, the unlocking means r2 ′ has a structure that does not include the lever biasing spring 33 that biases and holds the rotation operation lever 30 in the locked position or the unlocked position. Accordingly, the other structure is the same as that of the unlocking means r2. Therefore, in the other examples shown in the drawings, parts or portions having the same structure are denoted by the same reference numerals as those in the first embodiment and will be described below.

  As shown in FIGS. 13 to 15, the fixed cylinder 15 provided in the locking means r <b> 1 ′ is formed with a concave attachment step portion 21 b by partially thinning the upper plate surface side of the attachment plate portion 21. On one side of 21b, an annular spring insertion recess 21c is formed by further recessing. Furthermore, the fitting recessed part 21d of the rotation prevention member 18 is provided in the hole edge of the polygonal hole part 20a. The anti-rotation member 18 is provided with a protrusion 18b extending radially outward at the opening edge of the latch protrusion 14, and a shutter engaging groove 18c is formed on the opening side of the protrusion 18b, and a positioning protrusion on the lower surface. 18d is provided. Then, the positioning projection 18 d is positioned by being fitted in the fitting recess 21 d of the fixed cylinder 15, and the detent member 18 is fitted into the polygonal hole 20 a of the cylindrical portion 20 so as to be freely inserted and removed.

  The shutter mechanism 45 includes a shutter 50 and a shutter biasing spring 51 that is a torsion coil spring. The shutter 50 uses an L-shaped metal plate, has a pin small hole 50a on the base end side thereof, bends and raises the bent tip, and forms a positioning protrusion 50b there. In addition, a circular guide hole 50c is provided beside the positioning protrusion 50b, while a spring-hanging notch 50d is provided on the side edge beside the pin small hole 50b. Then, the shutter 50 is disposed on the mounting step portion 21b with the front end engaged with the shutter engaging groove 18c of the anti-rotation member 18, and the fulcrum pin 52 is attached to the pin small hole 50a via the washer 53 so as to be rotatable. Assemble to. Further, the shutter urging spring 51 is fitted in the spring fitting recess 21c, and one end of the spring is hooked on the fixed cylinder 15 side, while the other end of the spring is hooked on the spring hooking notch 50d. As shown, the guide hole 50c is urged so as to open at a position shifted from the latch projection opening 14, and is held against the peripheral wall of the mounting step portion 21b at this latch projection restriction position. Therefore, when the shutter 50 is in the latch protrusion restricting position, as shown in FIG. 15, the head of the latch 19 is restricted from abutting against the shutter 50 and protruding from the latch protrusion 14.

  Now, when closing the folding door B provided with the latching lock device R ′, the shutter 50 is in the latch protrusion restricting position as described above, and the latch 19 is in contact with the shutter 50 from the beginning and is in the retracted state. Then, when the folding door B is pulled in the closing direction by the guide rail 40, both folding door panels 42 and 43 slide while rotating as shown in FIG. Then, when the folding door B approaches the closed state by further sliding, the positioning projection 50b of the shutter 50 is pushed against the side wall 40a of the guide rail 40, and accordingly, the guide hole 50c of the shutter 5 and the latch projection 14 are It rotates against the shutter biasing spring 51 to the communicating latch protrusion restriction release position. Then, as shown in FIGS. 17 and 18, the latch 19 protrudes from the latch protrusion 14, but since the tapered surface 19 a abuts against the side wall 40 a of the guide rail 40, the latch 19 is biased along the tapered surface 19. As shown in FIG. 19, it is retracted once against the spring 17 and protrudes again when it exceeds the side wall 40 a, engages and locks with the grooved traveling path 41, and restricts the opening of the folding door B. Then, the folding door B is closed as shown in FIG.

  Thereafter, when the folding door B is opened, the turning operation lever 30 is turned to the unlocking position. Then, the wire 25 descends according to the rotation of the connecting ring 35, and the latch 19 is retracted into the fixed cylinder 15 against the latch urging spring 17 to unlock it. Is possible. When the folding door B is pulled in the opening direction in the unlocked state, the folding door panels 42 and 43 are slid along the guide rail 40 while being bent via the gear hinge 44, and the folding door B gradually begins to open. In the opening initial operation of the folding door B, in the shutter mechanism 45, the positioning projection 50b of the shutter 50 is separated from the side wall 40a of the guide rail 40 and rotated by the biasing force of the shutter biasing spring 51 in accordance with the folding door opening operation. Then, it returns to the latch protrusion restricting position. At this time, in the latching lock device R ′, when the latch 19 is in the retracted state and exceeds the side wall 40 a of the guide rail 40, when the hand is released from the turning operation lever 30, the latch 19 is urged by the urging force of the latch urging spring 17. However, the latch 19 is maintained in the retracted state as it is, with the head hitting the shutter 50 at the latch protrusion restricting position and the protrusion being restricted.

  Therefore, in the latching lock device R ′, the protrusion of the latch 19 is restricted by the shutter 50 during the operation other than the time of locking / unlocking which requires the latching operation of the latch 19, and thereby the protruding latch 19 is exposed to the outside. Can be prevented to the minimum necessary, and the appearance around the door can be prevented from being deteriorated due to the protruding state of the latch, and the aesthetics can be improved. Further, the protruding latch can be prevented from hitting other peripheral members, thereby protecting the structural parts of the lock device including the latch and preventing the peripheral other members from being damaged. Can do.

  In the illustrated other example, the example in which the shutter mechanism 45 is incorporated in the folding door B is shown. However, the shutter mechanism 45 can also be incorporated and applied to the hinged door and the sliding door.

  In addition to the door means, the present invention connects the rotation operation member and the latch with a wire, and other opening / closing means that are essential to lock and unlock the latch according to the rotation operation of the rotation operation member. It can be widely applied to applications.

It is a disassembled perspective view of a latching lock apparatus. (Example 1) It is an assembly perspective view of a latching lock device. (A) is a top view which shows the locking means with which a latching lock apparatus is equipped, (B) is a longitudinal cross-sectional view. It is a perspective view which shows the sliding door structure incorporating the latching lock apparatus. It is a front view which shows a sliding door structure. It is a front view which shows a sliding door structure at the time of latching operation | movement. It is a front view which shows a sliding door structure in the state after locking. It is a front view which shows the sliding door structure in the state after unlocking. It is a perspective view which shows the latching lock apparatus of an unlocked state. It is a longitudinal cross-sectional view which shows the locking means of the latching lock apparatus of an unlocked state. (A) is a longitudinal cross-sectional view which shows the locking means of the latching lock device applied by incorporating it in the hinged door or the folding door, and (B) is a longitudinal cross-sectional view showing the locking means as seen from the end face side. It is a perspective view which shows the folding door structure incorporating the other latching lock device provided with the shutter mechanism. (Example 2) It is a disassembled perspective view of another latching lock device. It is an assembly perspective view of another latching lock device. It is sectional drawing which shows the locking means with which another latching lock apparatus is equipped. It is a perspective view which shows a folding door structure in a half open state. It is a perspective view which shows the latching lock apparatus of a locked state. It is a longitudinal cross-sectional view which shows the latching lock apparatus of a locked state It is an end elevation shown in the state where the folding door structure was locked with a latch. It is a perspective view which shows a folding door structure in a closed state. (A1) is a longitudinal sectional view of the locking means applied to the sliding door, (A2) is a longitudinal sectional view showing the locking means as viewed from the end surface side, and (B1) the hinged door or folding door. A longitudinal sectional view of the applied locking means, (B2) is a longitudinal sectional view showing the locking means as viewed from the end face side.

Explanation of symbols

A Sliding door B Folding door R / R 'Latching lock means r1, r1' Locking means r2, r2 'Unlocking means 10, 40 Guide rail (door support means)
13, 13 ′ Stopper 15 Fixed cylinder 16 Connecting square bar 16c Screw portion 18 Non-rotating member 25 Wire 30 Rotating operation lever (rotating operation member)
35 Connection ring (connection member)
50 Shutter 50b Positioning projection 50c Guide hole

Claims (2)

Locking means for providing a latch with a polygonal cross section having a tapered surface at the head, spring-biasing upward in a fixed cylinder embedded in the door end side of the upper end portion of the door so as to be able to protrude and retract from the latch protruding opening, Unlocking means having a rotation operation member connected by a wire via a connecting member embedded in the handle position of the door between the latch, and when the door is closed, the taper surface of the latch is the door support means When it comes into contact with the fixed stopper on the side, it retracts once against the spring biasing force, then protrudes again and engages with the stopper to restrict the return of the door. In a latching lock device that retracts the latch by moving and pulling down the wire to release the door return restriction,
The locking means is
A square pipe shape that matches the cross-sectional shape of the latch, and a non-rotating member that fits in and out of the latch in a rotation-restricted state by being detachably fitted into a polygonal hole provided on the upper end side of the fixed cylinder. ,
A threaded portion that is screwed into a female screw hole drilled in the lower part of the latch and is connected to the latch so that the amount of screwing can be adjusted is provided at the upper end, while the wire is connected to the lower end and moves up and down relative to the fixed cylinder. With a connecting square bar that can be inserted through,
When the locking member is pulled out from the fixed cylinder, the rotation restricting state of the latch is released, and when the amount of screwing is adjusted by screwing the latch with respect to the connecting square bar, according to the amount of screwing. tension is characterized Rukoto such is adjusted for the wire, latching lock device. The locking means is provided with a shutter that is pivotably mounted on the fixed cylinder and is normally spring-biased to a latch protrusion restricting position, and the shutter is the anti-rotation member when it is in the latch protrusion restricting position. And a guide hole that opens at a position shifted from the latch projection opening, and contacts the door support means when the door is closed, and the guide hole opens at a latch projection restriction release position that communicates with the latch projection opening. The latching lock device according to claim 1, further comprising a positioning protrusion that guides in such a manner.

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