JP2014029103A - Folding door open/close unit and folding door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an open/close unit which can achieve easily opening/closing operation, can ease restrictions on design, and can ensure excellent workability.SOLUTION: An open/close unit is provided in a folding door opening and closing by bent. The open/close unit includes: a connection member which connects both sides of bent parts of the folding door and is bending-deformable; and a lock mechanism maintaining an expanded state of the folding door and also releasing the state.

Description

  The present invention relates to an opening / closing unit and a folding door that assist opening / closing operation of a folding door.

  Folding doors that open and close by folding are used for closets, closet doors, and the like. For example, the folding door is configured such that a pair of door plates are pivotably connected to each other and can be bent and deformed, and end portions of the door plates are engaged so as to be reciprocally movable along rails provided on the door frame.

  Generally, by pulling a handle provided on the surface near the bent portion of the door plate from the closed door state along the door frame, the door plate is rotated so that the pair of door plates are folded, and the door plate is moved relative to the rail. It becomes an open state which opens the space enclosed by the door frame by becoming a standing posture.

  On the contrary, by pressing the surface in the vicinity of the bent portion of the door plate from the open door state where the door plate stands up, the pair of door plates are rotated so that the door plates are positioned along the rails. Closed to close the space surrounded by

  In order to facilitate the opening and closing operation in such a folding door, for example, a push-open type opening and closing that embeds an expanding and contracting engagement structure on the opposing surfaces of the bent portions of a pair of door plates and assists the opening and closing operation by pressing the door plates. A device provided with an assist mechanism is also provided.

JP 2009-191508 A

  In a structure that opens and closes by a handle operation, the opening and closing operation is complicated, and there are many restrictions on the design of the doorboard. Moreover, the opening / closing assist mechanism embedded in the facing surface of the door plate is difficult to construct because it requires digging into the door.

  An opening / closing unit according to an embodiment is an opening / closing unit provided in a folding door that opens and closes by folding, and connects both sides of the folding portion of the folding door and holds the folding door in an unfolded state, and a connecting member that can be bent and deformed. And a lock mechanism configured to release the holding.

  According to the present invention, an easy opening / closing operation can be realized, design restrictions can be reduced, and high workability can be ensured.

Explanatory drawing which shows the folding door provided with the opening / closing unit concerning 1st Embodiment of this invention. The disassembled perspective view which shows the structure of the opening / closing unit concerning the embodiment. The perspective view of the opening / closing unit concerning the embodiment. Explanatory drawing which shows operation | movement of the opening / closing unit and folding door concerning the embodiment. The perspective view which shows the 1st state of the opening / closing unit concerning 2nd Embodiment of this invention. The perspective view which shows the 2nd state of the opening / closing unit concerning the embodiment. The disassembled perspective view which shows the structure of the opening / closing unit concerning the embodiment. Explanatory drawing which shows operation | movement of the opening / closing unit and folding door concerning the embodiment. Explanatory drawing which shows operation | movement of the opening / closing unit and folding door concerning the embodiment. Explanatory drawing which shows operation | movement of the opening / closing unit and folding door concerning the embodiment. The perspective view which shows the folding door provided with the opening / closing unit concerning other embodiment of this invention.

[First embodiment]
Hereinafter, the folding door 10 and the opening / closing unit 30 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the drawings, arrows X, Y, and Z indicate three directions orthogonal to each other. In each drawing, the configuration is appropriately enlarged, reduced, or omitted for explanation.

  In the present embodiment, as shown in FIG. 1, an example in which two folding doors 10 having a pair of door plates 11 and 11 are provided in one door frame 20 is shown.

  The door frame 20 is a rectangular frame, and rails 21 are provided on the upper and lower frames along the sliding direction (X direction).

  Each folding door 10 has a pair of door plates 11 connected to each other so as to be rotatable, and is configured to be bent and deformed at the connecting portion. The pair of door plates 11 are rectangular plate members having a predetermined size corresponding to the door frame 20, and are connected to each other via a rotation axis C1 along the Z direction. A hinge mechanism 13 and a push-open type opening / closing unit 30 are provided in a bent portion that is a connecting portion of the pair of door plates 11.

  At the upper and lower ends of the outer edge opposite to the inner edge on the connecting side of each door plate 11, rollers 14 that engage with the rail 21 so as to run are provided. One end of the door plate 11 is supported by the rail 21 of the door frame so that the roller 14 and the rail 21 are engaged.

  As shown in FIGS. 2 and 3, the opening / closing unit 30 includes a connecting member 31 that can be bent and deformed, a push latch mechanism 43 as a lock mechanism that holds the folding door 10 in an unfolded state, and the folding door 10 is bent. And a spring member 44 as a biasing mechanism that biases in the direction.

  The connecting member 31 is rotatably connected to a pair of fixing pieces 35 and 36 fixed to the inner side surface 11a of the door plate 11 on both sides of the bent portion of the folding door 10 and the pair of fixing pieces 35 and 36, respectively. And a pair of connecting pieces 37 and 38 that are rotatably connected to each other, and a pair of rotating shafts C2 and C3 that rotatably connect these pieces 35 to 38 with each other. . The connecting member 31 can be bent and deformed by the rotation of the respective pieces 35 to 38, and the folding door 10 opens and closes in conjunction with a change in the bent state of the connecting member 31.

  The fixed pieces 35 and 36 are rectangular plate-like members made of, for example, a resin molded product, and are fixed to the pair of door plates 11 on both sides of the rotation axis C1. Attachment pieces 35a, 36a standing from the upper and lower edges of the fixed pieces 35, 36 are integrally formed. A shaft hole 35b into which the rotation axis C2 along the Z direction is inserted is formed in the attachment pieces 35a and 36a at the outer end portions of the fixed pieces 35 and 36.

  One fixed piece 35 is integrally provided with a striker 41 constituting a push latch mechanism 43. The striker 41 is formed so as to protrude from a predetermined position of the fixed piece 35, and is configured to be inserted and engaged with the latch 42 of the connecting piece 37 that faces the fixed piece 35 when the door is closed.

  The connecting pieces 37 and 38 are rectangular plate-like members made of, for example, a resin molded product, and mounting pieces 37a and 38a standing on upper and lower end edges are integrally formed. On one end side of the connecting pieces 37, 38, shaft holes 37b, 38b through which the rotation axis C2 passes are formed in the mounting pieces 37a, 38a. The connecting pieces 37 and 38 are rotatably connected to the outer end portions of the pair of fixed pieces 35 and 36 via the rotating shaft C2, respectively.

  On the other end side of the pair of connecting pieces 37, 38, shaft holes 37d, 38d into which the rotation shaft C3 along the Z direction is inserted are formed. The other ends of the pair of connecting pieces 37, 38 are connected to each other via a rotating shaft C3 so as to be rotatable.

  A latch mounting hole 37f is formed at a predetermined position of one connecting piece 37. A latch 42 configured to be engageable with the striker 41 is inserted and fixed in the latch mounting hole 37f.

  The latch 42 is configured such that the engagement state with the striker 41 can be switched by the displacement of the relative position accompanying the pressing operation of the door plate 11. The latch 42 provided on the connecting piece 37 and the striker 41 provided on the fixed piece 35 constitute a push-open push latch mechanism 43.

  The push latch mechanism 43 is configured such that the engagement state is switched by moving the latch 42 relative to the striker 41 in accordance with the pressing operation of the door plate 11. When the striker 41 is inserted into the latch 42 from the disengaged state by the pressing of the door plate 11 in the closing operation, the striker 41 is supplemented and engaged with the latch 42 in the closing operation, and is engaged by the pressing of the door plate 11 in the opening operation. When the striker 41 is further pressed toward the latch 42, the engagement is released.

  A spring member 44 constituting an urging mechanism is provided at a connecting portion between one fixed piece 35 and the connecting piece 37. The spring member 44 is a torsion coil spring, and a cylindrical coil portion 44a is mounted on the outer periphery of the rotating shaft C2, and biasing pieces 44b and 44c at the upper and lower ends thereof are opposed surfaces of the connecting piece 37 and the fixing piece 35, respectively. By urging them in contact with each other, the urging is performed in the direction in which the angle between the fixed piece 35 and the door plate 11 and the connecting piece 37 is increased. That is, the spring member 44 is always biased in the opening direction in which the folding door 10 is folded and the door frame 20 is opened.

  The connecting member 31 includes a pair of door plates 11, a pair of fixing pieces 35, 36, and a pair of connecting pieces 37, 38 in a state where the fixing pieces 35, 36 are fixed to the inner surface of the door plate 11 with bolts B or the like. Thus, a link mechanism that surrounds the rhombus-shaped space is configured, and each piece 35 to 38 rotates and the rotation shafts C1 to C3 move and deform so as to expand and contract in the Y direction and the X direction. 4 can be switched between the first state and the second state.

  As shown in FIG. 4, in the first state in which the connecting member 31 of the opening / closing unit 30 extends in the X direction, the bending angle between the pair of connecting pieces 37, 38 is greatly expanded, and the connecting pieces 37, 38 and the fixing piece 35, The bending angle with 36 is reduced. At this time, the door plate 11 is deployed together with the pair of fixing pieces 35 and 36 to close the door frame, and the striker 41 is inserted into the latch 42 and engaged.

  In the second state in which the connecting member 31 of the opening / closing unit 30 extends in the Y direction, the bending angle between the pair of connecting pieces 37 and 38 is small, and the bending angle between the connecting pieces 37 and 38 and the fixed pieces 35 and 36 is large. Become. At this time, the door plate 11 is folded together with the pair of fixed pieces 35 and 36 to open the space S <b> 1 in the door frame 20.

  Hereinafter, the opening / closing operation | movement of the folding door 10 concerning this embodiment is demonstrated with reference to FIG. As shown in FIG. 4, in the first state, the pair of fixed pieces 35 and 36, the connecting pieces 37 and 38, and the door plates 11 and 11 are arranged along the rail 21 and extend in the X direction. At this time, the latch 42 and the striker 41, which are respectively provided on the fixed piece 35 and the connecting piece 37 and face each other, are engaged, and the first state is maintained.

  When the outer surface near the connecting portion of the door plate 11 is pressed in the first state, the engagement of the striker 41 and the latch 42 of the push latch mechanism 43 in the engaged state is released.

  When the engagement of the push latch mechanism 43 is released, the holding in the first state is released, and the connecting member 31 becomes deformable. Therefore, the urging force of the spring member 44 is urged in a direction in which the angle between the fixed piece 35 and the connecting piece 37 around the rotation axis C2 is widened, and a pair of fixed pieces 35 around the rotation axis C1. When the angle between 36 and the angle between the pair of connecting pieces 37 and 38 around the rotation axis C3 are reduced, the connecting member 31 expands and contracts so as to extend in the Y direction, thereby entering the second state. Along with this, the pair of door plates 11 and 11 are rotated so as to be folded, and the door plate 11 stands up with respect to the rail 21, thereby opening the space S <b> 1 surrounded by the door frame 20. It becomes.

  From the second state, when the operator presses the door plate 11 to the back of the door frame 20 with fingers or the like, the angle between the fixed piece 35 and the connecting piece 37 is reduced around the rotation axis C2, and the rotation axis C1 is the center. As described above, the connecting member 31 expands and contracts to be in the first state so that the angle between the pair of fixed pieces 35 and the angle between the pair of connecting pieces 37 and 38 about the rotation axis C3 become larger. At the same time, the pair of door plates 11, 11 are rotated so as to expand, and the door plate 11 is in a posture along the rail 21, thereby closing the space S <b> 1 surrounded by the door frame 20. At this time, when the predetermined position is reached, the striker 41 is inserted into the latch 42 and engaged, whereby the first state is maintained.

  According to the present embodiment, a push-open type opening / closing operation can be realized with a simple configuration. Therefore, the handle on the outer surface of the door plate 11 can be omitted, design restrictions can be reduced, and flat design can be realized.

  In addition, the opening / closing unit 30 according to the present embodiment can ensure the push-open function by simply attaching the screw to a predetermined position on the inner surface of the door plate 11. Therefore, the digging process of the door panel 11 is not required, it can be retrofitted without changing the basic structure of the existing door panel, and high workability can be secured.

  In addition, since the striker 41 and the latch 42 of the push latch mechanism 43 protrude inside the connecting member 31, they are not exposed to the outside, so that the design and safety are high.

[Second Embodiment]
Hereinafter, a folding door 10 and an opening / closing unit 130 according to a second embodiment of the present invention will be described with reference to FIGS. In the drawings, arrows X, Y, and Z indicate three directions orthogonal to each other. In each drawing, the configuration is appropriately enlarged, reduced, or omitted for explanation. In the present embodiment, when the lock unit 50 is engaged, when the load greater than or equal to a predetermined value is applied to the folding door in the folding direction, the engagement means that allows the coupling piece 37 and the lock unit 50 to be detached. However, since other features are the same as those in the first embodiment, description of common parts is omitted.

  As shown in FIGS. 5 to 7, the opening / closing unit 130 includes a connecting member 31 that can be bent and deformed, a lock unit 50 as a lock mechanism that holds the folding door 10 in an unfolded state, and a direction in which the folding door 10 is bent. A spring member 44 as an urging mechanism that urges the connecting member 31, and a separation unit 60 that can detach the connecting member 31 and the lock unit 50. In the perspective views of FIGS. 5 to 7, the folding door 10 is partly cut away for explanation, and only the vicinity of the opening / closing unit 130 is shown.

  The connecting member 31 is rotatably connected to a pair of fixing pieces 35 and 36 fixed to the inner side surface 11a of the door plate 11 on both sides of the bent portion of the folding door 10 and the pair of fixing pieces 35 and 36, respectively. And a pair of connecting pieces 37 and 38 that are rotatably connected to each other, and a pair of rotating shafts C2 and C3 that rotatably connect these fixed pieces and connecting pieces 35 to 38 to each other. It is configured. The connecting member 31 can be bent and deformed by the rotation of the respective pieces 35 to 38, and the folding door 10 opens and closes in conjunction with a change in the bent state of the connecting member 31.

  The fixed pieces 35 and 36 are rectangular plate-shaped members made of, for example, a resin molded product or metal, and are fixed to the pair of door plates 11 on both sides of the rotation axis C1. Attachment pieces 35a, 36a standing from the upper and lower edges of the fixed pieces 35, 36 are integrally formed. A shaft hole 35b into which the rotation axis C2 along the Z direction is inserted is formed in the attachment pieces 35a and 36a at the outer end portions of the fixed pieces 35 and 36.

  One fixed piece 35 is integrally provided with a striker 51 that constitutes a part of the lock unit 50.

  The other fixed piece 36 is provided with a receiving portion 36c that engages with the striker 51 when the door is opened. The receiving portion 36 c is configured to have a pair of claw pieces 36 d, for example, and captures the striker 51 that enters according to the bending operation of the connecting member 31.

  The connecting pieces 37 and 38 are rectangular plate members made of, for example, a resin molded product or metal, and mounting pieces 37a and 38a erected on upper and lower end edges are integrally formed. On one end side of the connecting pieces 37, 38, shaft holes 37b, 38b through which the rotation axis C2 passes are formed in the mounting pieces 37a, 38a. The connecting pieces 37 and 38 are rotatably connected to the outer end portions of the pair of fixed pieces 35 and 36 via the rotating shaft C2, respectively.

  On the other end side of the pair of connecting pieces 37, 38, shaft holes 37d, 38d into which the rotation shaft C3 along the Z direction is inserted are formed. The other ends of the pair of connecting pieces 37, 38 are connected to each other via a rotating shaft C3 so as to be rotatable. Restricting members 73 and 74 constituting restricting means for restricting the turning angle between the connecting pieces 37 and 38 are mounted around the third turning axis C3.

  Long holes 37e and 37e through which the adjusting screws 71 and 72 are inserted are formed at predetermined positions of one connecting piece 37, and the separation plate 61 is fixed by the adjusting screws 71 and 72 in the long holes 37e and 37e. . By adjusting the positional relationship between the connecting piece 37 and the separation plate 61 by the long holes 37e and 37e and the adjusting screws 71 and 72, the dimensional error is absorbed, and the assembly can be performed with high mounting accuracy. The connecting piece 37 is formed with an engaging piece 37g that is detachably engaged with the engaging claw 38e of the connecting piece 38.

  The lock unit 50 includes a striker 51 formed on the fixed piece 35 and a latch unit 52, and constitutes a push-type latch mechanism. The engagement state between the striker 51 and the latch unit 52 can be switched in accordance with the pressing operation of the door plate 11.

  The striker 51 protrudes from a predetermined position of the fixed piece 35 and has a hook shape. In the first state when the door is closed, the striker 51 engages with a latch unit 52 provided on the connecting piece 37 side facing the fixed piece 35 to open the door. In the second state at that time, it is detached from the latch unit 52 and engaged with the receiving portion 36 c provided on the fixed piece 36.

  The latch unit 52 includes a lock plate 53 that can be rotated by a rotation axis C <b> 2 with respect to the fixed piece 35, a cam 54 that can be rotated on the lock plate 53, and an X direction with respect to the lock plate 53. The slider 55 is provided so as to be slidable, and a clamping body 56 that captures or releases the protrusion 55a provided on the slider 55 by opening and closing.

  The lock plate 53 is disposed so as to overlap the inside of the separation plate 61 and engages with the separation plate 61 so as to be separable. At the edges on both axial sides of the lock plate 53, there are provided mounting pieces 53a standing so as to overlap the inner side of the mounting pieces 61a of the separation plate 61, and a rotating shaft C2 is provided at one end of the mounting piece 53a. A mounting hole 53b to be inserted is formed. At predetermined positions on the other end side of the upper and lower attachment pieces 53a, engagement recesses 53c constituting engagement means are formed. The engagement recess 53c is formed of, for example, a rectangular recess, and is configured to be able to engage with and release from the engagement protrusion 61c when the engagement protrusion 61c of the separation plate 61 is fitted or pulled out.

  A cam 54 is rotatably supported on the lock plate 53. The cam 54 protrudes toward the connecting piece 37 side, and is configured to rotate as indicated by an arrow A3 as the door plate 11 is pressed and moved.

  The slider 55 is formed with a receiving surface 55c that receives the tip 54a of the cam 54, and is configured to slide as indicated by an arrow A4 as the cam 54 rotates. A protrusion 55 a is provided at the tip of the slider 55 in the sliding direction, and moves forward and backward as the slider 55 moves. The sandwiching body 56 is configured to open or close as the protrusion 55a moves forward and backward to capture the protrusion 55a or release the protrusion 55a. An engaging portion 55 b that is engaged with or released from the striker 51 is provided at the base end of the slider 55 in the sliding direction.

  The separation unit 60 includes a separation plate 61 provided so as to overlap the inside of the connecting piece 37. The separation plate 61 is provided so as to be rotatable about a rotation axis C2. At the edges on both sides in the axial direction of the separation plate 61, there are provided mounting pieces 61a standing so as to overlap the inner side of the mounting pieces 37a of the connecting piece 37, and a rotating shaft C2 is provided at one end of the mounting piece 61a. A shaft hole 61b to be inserted is formed. At a predetermined position on the other end side of the attachment piece 61a, an engagement protrusion 61c constituting the engagement means is formed.

  The engaging protrusion 61c is bent in a V-shaped cross section so as to protrude toward the lock plate 53 that overlaps the inside. The engagement projection 61 c is fitted into the engagement recess 53 c of the lock plate 53, so that the lock plate 53 and the separation plate 61 are integrally held. Further, the engagement protrusion 61c is configured to separate the lock plate 53 and the separation plate 61 by coming out of the engagement recess 53c when a load is applied in a direction in which the folding door 10 is folded.

  The engagement means is constituted by the engagement recess 53c on the lock plate 53 side and the engagement protrusion 61c on the separation plate 61 side. With this engagement means, the connection piece 37 and the lock unit 50 can be detached when a predetermined load or more is applied to the folding door 10 in the folding direction with the lock unit 50 engaged.

  A spring member 44 constituting an urging mechanism is provided at a connecting portion between one fixed piece 35 and the connecting piece 37. The spring member 44 is a torsion coil spring, and a cylindrical coil portion 44a is mounted on the outer periphery of the rotating shaft C2, and biasing pieces 44b and 44c at the upper and lower ends thereof are opposed surfaces of the connecting piece 37 and the fixing piece 35, respectively. By urging them in contact with each other, the urging is performed in the direction in which the angle between the fixed piece 35 and the door plate 11 and the connecting piece 37 is increased. That is, the spring member 44 is always biased in the opening direction in which the folding door 10 is folded and the door frame 20 is opened.

  The connecting member 31 includes a pair of door plates 11, a pair of fixing pieces 35 and 36, and a pair of connecting pieces 37 and 38 in a state where the fixing pieces 35 and 36 are fixed to the inner side surface of the door plate 11. 5 and FIG. 8 by forming a link mechanism that surrounds the space, and by rotating each of the pieces 35 to 38 and moving the rotation axes C1 to C3 so as to expand and contract in the Y direction and the X direction. The first state shown in FIG. 6 and the second state shown in FIGS. 6 and 9 can be switched.

  Hereinafter, the opening / closing operation | movement of the folding door 10 concerning this embodiment is demonstrated with reference to FIG. 5 thru | or FIG. 5 and 8, the pair of fixed pieces 35 and 36, the connecting pieces 37 and 38, and the door plates 11 and 11 are arranged along the rail 21 and extend in the X direction. In the first state, the connecting member 31 of the opening / closing unit 30 extends in the X direction, the bending angle between the pair of connecting pieces 37 and 38 is greatly expanded, and the bending angle between the connecting pieces 37 and 38 and the fixed pieces 35 and 36 is increased. Becomes smaller. The door plate 11 is unfolded together with the pair of fixed pieces 35 and 36 to close the door frame. In the lock unit 50, the striker 51 is engaged with and captured by the latch unit 52, and the locked state is maintained. Yes.

  As an opening operation, when the outer surface near the connecting portion of the door plate 11 is pressed from the first state, the striker 51 moves in the Y direction as indicated by the arrow A1, and the base end portion 54b of the cam 54 is moved by the arrow A2. As shown, it moves in the Y direction, and the tip 54a of the cam 54 rotates clockwise as shown by the arrow A3. Along with this movement, the slider 55 moves in the X direction as indicated by an arrow A4. By the movement of the slider 55, the engaging portion 55b of the slider 55 that has been engaged with the hook-like striker 51 is retracted from the striker 51, and the engagement with the striker 51 is released. Further, as the slider 55 slides, the protrusion 55 a provided at the tip of the slider 55 enters the holding body 56, so that it is captured by the holding body 56 and the unlocked state of the lock unit 50 is maintained. .

  When the engagement of the lock unit 50 is released, the holding of the connecting member 31 in the first state is released, and the connecting member 31 becomes deformable. Therefore, the urging force of the spring member 44 is urged in a direction in which the angle between the fixed piece 35 and the connecting piece 37 around the rotation axis C2 is widened, and a pair of fixed pieces 35 around the rotation axis C1. The angle between 36 and the angle between the pair of connecting pieces 37 and 38 around the rotation axis C3 are reduced, and the connecting member 31 is extended and contracted so as to extend in the Y direction. It becomes the 2nd state shown.

  In the second state, the pair of door plates 11 and 11 are rotated so as to be folded, and the door plate 11 stands up with respect to the rail 21, thereby opening the space S <b> 1 surrounded by the door frame 20. It becomes a state. In the second state, the bending angle between the pair of connecting pieces 37 and 38 is small, and the bending angle between the connecting pieces 37 and 38 and the fixed pieces 35 and 36 is large. At this time, the striker 51 is captured by the receiving portion 36c, and the engaging claw 38c of the connecting piece 38 is engaged with the engaging piece 37g of the connecting piece 37, whereby the open door state is maintained.

  From the second state, when the operator presses the door plate 11 to the back of the door frame 20 with fingers or the like, the angle between the fixed piece 35 and the connecting piece 37 is reduced around the rotation axis C2, and the rotation axis C1 is the center. The connecting member 31 expands and contracts so that the angle between the pair of fixed pieces 35 and the angle between the pair of connecting pieces 37 and 38 about the rotation axis C3 become larger. At the same time, the pair of door plates 11, 11 are rotated so as to expand, and the door plate 11 is in a posture along the rail 21, thereby closing the space S <b> 1 surrounded by the door frame 20. At this time, when the predetermined position is reached, the striker 51 is inserted into the latch unit 52 and engaged, whereby the first state is maintained. Further, when the door plate 11 is pressed, the cam 54 is rotated again and the slider 55 is moved to the left, so that the protrusion 55a is further moved forward from the state in which the protrusion 55a is captured by the sandwiching body 56. With this entering operation, the push-open type clamping body 56 is opened, the protrusion 55a is released, and the slider 55 is returned to the right in the drawing by the reaction by the urging mechanism built in the clamping body 56. With this sliding operation, the striker 51 is again engaged with the engaging portion 55b of the slider 55, and the first state is established.

  As shown in FIG. 9, in the first state, when the operator presses the door plate 11 from the inside of the door plate 11 with fingers or the like and a load acts in the direction in which the folding door 10 is folded, the lock unit 50 remains in the engaged state. In this state, the lock plate 53 and the separation plate 61 are separated.

  That is, when the door plate 11 is pressed in the direction in which the door plate 11 is folded in the first state, the fixing piece 35 fixed to the door plate 11 moves in the folding direction, and the latch unit 52 that locks the striker 51 provided on the fixing piece and the lock. The plate 53 also moves in the Y direction. In addition, the rotation angle between the connecting piece 37 and the connecting piece 38 is restricted by the restricting means constituted by the restricting members 73 and 74, and the third turning axis C3 is closer to the door plate 11 than the first state. A pivoting movement is prevented.

  Due to the force pressing the door plate 11 in the folding direction, the force that separates the door plate 11 and the fixed piece 35 fixed to the door plate 11 and the connecting piece 37 acts. In the first state, the separation plate 61 fixed to the connecting piece 37 and the lock plate 53 captured by the fixing piece 35 by the lock unit 50 are engaged by the engagement protrusion 61c and the engagement recess 53c. The lock plate 53 and the separation plate 61 are separated when the engagement protrusion 61c comes out of the engagement recess 53c by the operation force that presses the door plate 11.

  As the engagement means is disengaged, the lock plate 53 and the separation plate 61 can be rotated about the second rotation axis C2, so that the door plate 11 is folded from the inside while being locked. Opening door operation is possible.

  When the door 11 is pressed from the outside in the closing direction from the third state opened by the separation of the separation plate 61 to reach a predetermined position, the separation plate 61 and the lock plate 53 are engaged again to return to the first state. To do.

  Also in this embodiment, the same effect as the first embodiment can be obtained. Furthermore, by providing a separation mechanism that separates the separation plate 61 and the lock unit 50 when the engagement means is disengaged, the door can be opened from the inside. Therefore, for example, even when a child who cannot reach the opening / closing unit 130 is trapped inside, by pressing the door plate 11 from the inside, the door can be opened and escaped without releasing the lock.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible in the range which does not deviate from the summary of this invention. In addition, the specific configuration, material, and the like of each unit are not limited to those illustrated in the above embodiment, and can be changed as appropriate.

  For example, in the above-described embodiment, the connecting member 31 is configured to be able to be bent and deformed by rotatably connecting a pair of fixed pieces 35 and 36 attached to the door plates 11 and 11 and a pair of connecting pieces 37 and 38. However, the present invention is not limited to this, and various members that can be bent and deformed at a predetermined position may be used.

  It is also possible to omit the fixing pieces 35 and 36 and connect the connecting pieces 37 and 38 directly to the door plate 11 so as to be rotatable. In this case, by providing a spring member that urges the connecting pieces 37 and 38 and the door plate 11 to be widened, and by providing a lock mechanism for engaging or releasing the door plate 11 and the connecting piece 37, The same effect as the above embodiment can be obtained.

  The urging mechanism and the locking mechanism are not limited to the spring member 44, the push latch mechanism 43, and the lock unit 50 of the above embodiment, and other various urging mechanisms and engagement mechanisms can be used.

  For example, in the first and second embodiments, the fixing pieces 35 and 36 and the connecting pieces 37 and 38 are arranged so as to be aligned at the same position with respect to the axis. However, the present invention is not limited to this. For example, as another embodiment, like the opening / closing unit 230 shown in FIG. 11, the fixed piece 35 and the fixed piece 36, and the connecting piece 37 and the connecting piece 38 can be arranged at different positions in the axial direction. is there. In this case, the interference between the members in the second state can be avoided, and the folding angle of the folding door 10 can be reduced to make it compact.

  Furthermore, the present invention can be realized even if some of the constituent features of the above-described embodiment are omitted.

  DESCRIPTION OF SYMBOLS 10 ... Folding door, 11 ... Door plate, 13 ... Hinge mechanism, 14 ... Roller, 20 ... Door frame, 21 ... Rail, 30 ... Opening / closing unit, 31 ... Connecting member, 35.36 ... Fixed piece, 37.38 ... Connecting piece, DESCRIPTION OF SYMBOLS 41 ... Striker, 42 ... Latch, 43 ... Push latch mechanism (locking mechanism), 44 ... Spring member (biasing mechanism), B ... Bolt, C1-C3 ... Rotating shaft, 130 ... Opening / closing unit, 50 ... Lock unit ( Lock mechanism), 51 ... striker, 52 ... latch unit (latch mechanism), 53 ... lock plate, 53c ... engagement recess (engagement means), 60 ... separation unit, 61 ... separation plate, 61c ... engagement projection (engagement) Combining means), 230... Opening / closing unit.

Claims (5)

An opening / closing unit provided in a folding door that opens and closes by bending,
A connecting member that connects both sides of the bent portion of the folding door and can be bent and deformed,
A locking mechanism configured to hold the folding door in an unfolded state and to be able to release the holding;
Opening and closing unit comprising. An urging mechanism for urging the folding door in a direction to be folded;
The connecting member has a pair of connecting pieces whose one end is rotatably connected to the inside of the folding door and whose other ends are rotatably connected to each other,
The urging mechanism includes a spring member that urges the connecting piece and the folding door in a direction of widening the angle,
The lock mechanism is a push-type latch mechanism that can hold a first state in which the folding door is unfolded and the folding door and the connecting piece are close to each other, and the engagement state thereof can be switched by a pressing operation of the folding door. With
The connecting piece constitutes a link mechanism that surrounds a rhombus-shaped space between the folding door, and each connecting piece rotates with the bending deformation of the connecting member, so that a pair of the connecting piece and the folding door 2. The device according to claim 1, wherein the first door is deformable in a first state in which the folding door is deployed with a small angle and a second state in which the angle between the connecting piece and the folding door is large. Opening / closing unit. An urging mechanism for urging the folding door in a direction to be folded;
The connecting member is a pair of fixed pieces that are respectively fixed to the inner side surfaces on both sides of the folding portion of the folding door, and the pair of fixed pieces are rotatably connected to the pair of fixed pieces, respectively, through the fixed pieces. A pair of connecting pieces connected to the folding door and connected to each other so as to be rotatable,
The urging mechanism includes a spring member that urges the fixing piece and the connecting piece in the direction of widening the angle at the connecting portion;
The lock mechanism is configured to be able to engage and disengage from the striker provided on one of the fixed piece and the connecting piece, and on the other of the fixed piece and the connecting piece. And a push-type latch mechanism that can switch its engagement state by pressing the folding door,
The opening / closing unit according to claim 1, wherein the fixing piece can be installed on the folding door by attaching the fixed piece to the inner side surface of the folding door.   In the state in which the lock mechanism is engaged, when a predetermined load or more is applied to the folding door in a bending direction, the engagement mechanism includes an engagement unit that can separate the coupling member and the lock mechanism. The opening / closing unit according to any one of claims 1 to 3. The opening / closing unit according to any one of claims 2 to 4,
While having a plurality of door plates connected in a foldable manner, the opening / closing unit is provided inside the bent portion,
The first state in which the folding door is unfolded and the plurality of door plates are arranged along the first direction is held by the engagement of the lock mechanism,
When the engagement of the lock mechanism is released, the connecting member is bent and deformed by the urging force of the urging mechanism, the folding door is folded, and the plurality of door plates are erected with respect to the first direction. The folding door is characterized by being in a second state.

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