JP2012001916A - Folding door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding door that can be easily and steadily opened and closed through hand operation without a grip.SOLUTION: A folding door A comprises two door panels 2 and 3 that are bendably connected. An opening and closing device comprises a stationary metal fitting 11 and a rotary metal fitting 12, which are pivotally fixed to each other at base ends and energized with a spring 13 toward a spreading direction. The metal fitting 11 is fixed to an upper end of a back face of the one door panel 2, and a support pin projecting at an end of the rotary metal fitting 12 is slidably fitted in an guide rail 6a at an upper side of a door frame 1. In a closing state of the folding door A, a locking pin 21 is engaged to an engaging groove 24 of a protrusive piece 23 projecting at the end of the rotary metal fitting 12 to keep a locking state. The lock is released when a surface of the folding door A is lightly pressed, allowing the door panels 2 and 3 to be bent with restoration force of the spring 13 to spread the stationary metal fitting 11 and the rotary metal fitting 12, so that the door frame 1 is released.

Description

  The present invention relates to a folding door that opens and closes an opening such as a closet or a closet.

  Folding doors have been widely used since they have the advantage that a large opening opening of an article storage room such as a closet can be taken and a large space is not taken up when opening and closing. For example, Patent Document 1 describes the folding door. In this way, the opposite inner ends of the pair of left and right door panels are connected to each other in a refractive manner, and the outer end of one door panel is pivotally attached to one end of a door frame having an opening. The door panel is made to be a rotation side door panel, and the outer side edge of the other door panel is movably attached along the rails provided on the upper and lower frames of the door frame to attach the door panel to the movement side door panel. As a result, the door panel is folded in a double-folded state with one end of the door frame as a fulcrum by hooking the hand on the handle provided on the opposite inner end of the door panel and pulling it toward you. It is configured to be capable of folding.

  Furthermore, this folding door is equipped with a latch device at the upper end of the portion where the inner ends facing each other of the door panel are connected flexibly, and the latch is provided on the lower surface of the upper frame of the door frame. The door panel is held in a closed state by being locked in the locking groove, and the door panel is releasable by releasing the lock.

  The folding door configured as described above is manually opened and closed, but a folding door that is opened and closed electrically is also known. For example, in Patent Document 2, the rotating side panel and the moving side panel are folded by a hinge. A folding door configured to be freely connected is described as being configured to be opened and closed by reciprocating rotation of a rotation axis of a rotation side panel by a rotation driving device such as a motor disposed on the door frame. Has been.

Japanese Utility Model Publication No. 61-59785 Japanese Utility Model Publication No. 4-79188

  However, in the folding door described in Patent Document 1, in order to open the folding door, it is necessary to first unlock the folding door with respect to the door frame and then to hook the hand to the handle and pull it forward. Therefore, it is difficult for people who have luggage in their hands or who have difficulty with their fingertips. If a handle is provided, the appearance of the entire folding door may be damaged, and the production cost is high. There is a problem that becomes.

  On the other hand, according to Patent Document 2, since the folding door can be automatically opened and closed, a handle is unnecessary and the opening and closing operation is easy. However, the electric folding door is extremely expensive and has regular maintenance. In addition, it is necessary to provide a space for installing the rotary drive device in the folding door, and there is a problem in that the appearance of the rotary drive device is damaged by installation.

  The present invention has been made in view of such problems, and the object of the present invention is to allow easy and reliable opening and closing by manual operation without the need for a handle, etc. In addition, the present invention provides a folding door that can be easily disposed on an existing folding door by reforming or the like.

  In order to achieve the above object, a folding door according to the present invention, as described in claim 1, is connected to a door frame and two doors which are foldably connected to each other so as to open and close the opening of the door frame. A folding door comprising a single door panel and a door panel opening / closing device, the door panel opening / closing device having a fixed length fixed to a rear upper end of one of the door panels. The base end portion of the fixing bracket is pivotally attached to the base end portion of the fixing bracket, and is urged in a direction in which the fixing bracket is always separated by a spring force, and the tip end portion is And a pivot fitting projecting a support pin slidably fitted on a guide rail provided on the lower surface of the upper frame of the door frame. In addition, the fixing bracket and the rotating bracket are A lock mechanism that locks the opening so that it cannot be released when the two door panels are unfolded and the opening of the door frame is closed, and the surface of the door panel is pressed from this state. And a lock release mechanism for releasing the door frame opening by bending the two door panels toward the surface side by the spring force.

  In the folding door configured as described above, the invention according to claim 2 is characterized in that the fixing bracket is configured such that the upper end of the rear surface of the door panel is upward toward the front end edge on one long side edge side of the horizontal plate portion having a horizontally long rectangular shape. On the other hand, the rotating metal fitting is projected upward on the rear edge of the horizontal plate-like arm portion that can be overlapped with a small space on the horizontal plate portion of the fixed metal fitting. A vertical wall portion is provided toward the upper end of the vertical wall portion, and a horizontal projecting plate portion protruding upward from the arm portion is integrally provided at the upper end of the vertical wall portion. The arm part of the rotating metal fitting that overlaps the part and the base end part of the horizontal protruding plate part are pivotally mounted by a pivot, and the central part of a spring comprising a torsion spring is wound around this pivot. At the both ends of the spring, the vertical plate of the fixture and the side wall of the pivot Pressed against the part, characterized in that it urges the fixing bracket and the pivot bracket by the receiving direction to expand each other.

  Further, the invention according to claim 3 is characterized in that a rotating ring that rotates while slidingly contacting an inner wall surface of the guide rail facing the guide rail is attached to the tip of the support pin.

  According to a fourth aspect of the present invention, there is provided a desirable structure of the lock mechanism, wherein the lock mechanism is pivotally attached to the lower surface of the distal end portion of the horizontal plate portion of the fixing bracket and is attached to the lower surface of the horizontal plate portion by a spring force. A rotating plate that is pressed and has a lock pin projecting upward on the outer periphery, and a lock plate that is drilled at the tip of the horizontal plate portion and faces upward from the lower surface of the horizontal plate portion. In the direction in which the lock pin is locked to the base end of the long hole facing the base end side of the horizontal plate portion and the long hole curved in the arc shape long in the length direction of the horizontal plate portion inserted through The lock pin is fixed to the tip of the arm part with the spring constantly biasing the rotating plate and the lower surface of the tip part of the arm part of the rotating metal fitting pressed against the outer peripheral surface of the lock pin. Curved in an arc that guides from the front side to the rear side as you go A guide member having a straight guide surface and a protruding portion from the distal end of the arm portion, and the lower surface thereof receives the distal end surface of the lock pin entering along the guide surface of the guide member, and the lock pin enters. And a protrusion having a locking groove for receiving and locking the lock pin before the lock pin reaches the end of the guide surface of the guide member. And

  According to a fifth aspect of the present invention, there is provided a lock release mechanism comprising a pin passage groove penetrating in a front-rear direction of the guide member at a front end portion of the guide member, and a lock pin provided on the pin locking protrusion. When the guide plate of the guide member is detached from the end of the groove through the opening end of the groove, and the rotary plate is rotated by the restoring force of the spring, the lock pin is locked to the base end of the elongated hole which is the original position. The lock pin is configured to face the rear opening end of the pin passage groove.

  In the invention described in claim 5, the invention according to claim 6 is characterized in that the pin passage groove is formed so that the groove bottom gradually becomes shallower in the direction in which the lock pin passes. .

  According to the first aspect of the present invention, the fixing bracket fixed to the rear upper end portion of one of the door panels in the folding door, and the base end portion pivotally attached to the base end portion of the fixing bracket. And is always urged toward the fixed bracket by a spring force and is slidable on the guide rail provided on the lower surface of the upper frame of the door frame upward at the tip. The two door panels are unfolded at the tip of the pivoting metal fitting with the inserted support pin protruding until the stationary metal fitting and the pivotal metallage overlap each other against the spring force. When the opening of the sliding door frame is closed, the locking mechanism that locks the opening so as not to be releasable, and the lock is released by pressing the surface of the door panel from this state. Towards each other It is equipped with an unlocking mechanism that refracts and releases the opening of the door frame, so by simply pressing the appropriate place on the surface of one of the door panels toward the back side, Folding door consisting of two door panels that are unlocked and pivoted relative to each other in the direction in which the pivoting bracket and fixed bracket are unfolded by a spring force, and the opposite end is pivotably mounted. Can be opened while being automatically refracted in a plane shape toward the surface side.

  Furthermore, since a support pin that is slidably fitted into a guide rail provided on the lower surface of the upper frame of the door frame protrudes from the tip of the rotating bracket, the restoring force of the spring causes the rotating bracket to A direction in which the support pin projecting from the tip is pressed against the inner wall surface of the guide rail and moved in the guide rail as the folding door is opened, so that the rotating bracket can be smoothly and smoothly deployed to the fixed bracket. The folding door can be opened while being rotated.

  In addition, if the surface of the folding door is operated in the direction of closing by pressing, the fixing bracket and the rotating bracket rotate in the direction of folding against each other against the force of the spring and the folding door is completely closed. When the door is automatically locked, the folding door can be kept closed. Even when the folding door is closed, the support pin projecting from the tip of the rotating bracket smoothly moves in the guide rail in the direction opposite to the opening time according to the closing of the folding door. Can be closed.

  Therefore, it is possible to open and close the folding door easily and reliably even for people who have luggage or have difficulty with their fingertips without providing a handle on the door panel, and the appearance is simplified by eliminating the handle. Therefore, it is possible to provide a folding door excellent in design at a low cost.

  According to the invention of claim 2, the fixing bracket is a vertical plate that is attached to the upper end of the back surface of the door panel upward on the front end edge that is one long side edge side of the horizontal plate portion having a horizontally long rectangular shape. On the other hand, the rotating metal fitting is formed on the horizontal plate portion of the fixed metal fitting, and the vertical wall portion is directed upward to the rear end edge of the horizontal plate-like arm portion that can be overlapped with a small interval. In addition, a horizontal protruding plate portion projecting upward from the arm portion is integrally provided at the upper end of the vertical wall portion, and the base end portion of the horizontal plate portion of the fixing bracket is overlapped with the base end portion. Since the arm part of the moving bracket and the base end of the horizontal protruding plate are pivotally mounted by a pivot, the switchgear composed of the pivot bracket and the fixing bracket can be easily attached to an existing folding door. When the folding door is closed, the rotating bracket and the fixing bracket Since the folded such a state that had become, it is possible to reduce the height of the whole opening and closing mechanism so that it can be a relatively narrow space for disposing the opening and closing mechanism. In addition, since the length of the rotating bracket and the fixing bracket can be set long, and the mounting position thereof can be set to a desired position in the width direction of the door panel, the folding door is greatly refracted with a large opening degree. It can be opened.

  In addition, as described in claim 3, by attaching a rotating ring that rotates while slidingly contacting the opposing inner wall surface of the guide rail to the support pin protruding from the tip of the rotating metal fitting, the rotating metal fitting is further reduced. It can be operated lightly and quietly, and the folding door can be opened and closed more smoothly.

  According to a fourth aspect of the present invention, the locking mechanism between the fixing bracket and the rotating bracket includes a rotating plate pivotally attached to the lower surface of the distal end portion of the horizontal plate portion of the fixing bracket, and the outer peripheral portion of the rotating plate. A protruding lock pin is inserted through an arc-shaped long hole drilled at the tip of the horizontal plate portion and protrudes upward, and the lock pin is moved to the proximal end side of the long hole by a spring force. On the other hand, a vertical guide surface curved in an arc shape is provided by pressing the outer peripheral surface of the lock pin against the lower surface of the distal end portion of the arm portion of the rotating metal fitting and guiding it toward the distal end side of the arm portion. A projecting piece having a locking groove is projected from the tip of the arm portion, and the lower surface of the projecting piece is directed toward the locking groove along the guide surface of the guide member. The lock pin enters while receiving the tip of the lock pin The lock pin is provided on the side of the fixing bracket when the folding door is closed while refracting the fixing bracket and the rotating bracket so that they are folded together. While pressing the outer peripheral surface against the guide surface of the guide member provided on the rotating bracket side by the spring force, and sliding the tip surface on the inclined lower surface of the projecting piece, the lock pin is engaged with the projecting piece It can be reliably and smoothly moved toward the groove.

  Immediately before the lock pin moves along the guide surface of the guide member and reaches the end of the guide surface, the tip of the lock pin reaches the locking groove of the projecting piece, and instantaneously starts from the inclined lower surface of the projecting piece. The locking pin protrudes into the locking groove of the protruding piece by the restoring force of the spring pressing the rotating plate protruding the locking pin upward, and is locked to the bottom surface of the locking groove. Thus, the locked state can be reliably maintained despite the locking and rotating metal fittings being urged in the direction of expansion by the spring force.

  Further, as described in claim 5, the lock release mechanism includes a pin passage groove that penetrates the guide member in the front-rear direction of the guide member, and the lock pin is provided in the projecting piece. When pushing out from the opening end of the groove and detaching it from the end of the guide surface of the guide member, and rotating the rotating plate by the restoring force of the spring to lock the lock pin to the base end of the long hole which is the original position Since the lock pin is configured to face the rear opening end of the pin passage groove, the lock pin is moved to the opening end side of the locking groove of the projecting piece by lightly pressing the door panel. The guide plate can be easily detached from the end of the guide surface of the guide member, and the rotating plate is rotated by the restoring force of the spring, so that the lock pin can be instantaneously positioned at the rear opening end of the pin passage groove. In this state, When the pressing force against the cable is released, the lock pin passes through the pin passage groove forward, and the fixing bracket and the rotating bracket can be quickly deployed by the spring force to open the folding door while automatically refracting it. In addition, the lock pin can be instantaneously returned to the original position.

  According to the invention of claim 6, since the pin passage groove provided at the tip of the guide member is formed so that the groove bottom gradually becomes shallower in the direction in which the lock pin passes. Even though the passage groove is provided so as to cross the guide member across both side surfaces, the groove formed in the shallow bottom is opened on the guide surface side of the guide member. It is possible to reliably secure the guide surface portion having a width enough to allow the outer peripheral surface of the lock pin to slide, and to release the lock pin from the deep groove bottom side of the pin passage groove. The passage groove can be reliably passed and returned to the original position.

The simplified perspective view of the folding door which shows the state immediately after opening. The plan view. The top view of the folding door of the closed state. The side view which cut the part. The perspective view which looked at the switchgear part in a folding door from the surface side. The perspective view which looked at the switchgear part in a folding door from the back side. The perspective view of the state which closed the switchgear. The perspective view of the state which opened the switchgear. The disassembled perspective view of an opening / closing device. The top view of the locking mechanism part of the opening / closing apparatus in the state which closed the folding door. The simplified side view of the one part. The top view of the lock mechanism part which shows the state which cancels | releases a lock | rock. The simplified side view of the one part. The top view of the lock mechanism part of the state which cancels | releases a lock | rock and expand | deploys an opening / closing mechanism. The simplified side view of the one part. Sectional drawing of the pin passage groove | channel provided in the guide member. The top view which cut down a part of the state which has made the rotation metal fitting approach the fixing metal fitting. FIG. 3 is a plan view of a part of a state in which a guide member is in contact with a lock pin. The longitudinal side view of the state which is guiding the lock pin along the inclined lower surface of a protrusion. The top view which faced a part of the state which locked the lock pin to the locking groove of the protrusion.

  The embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 4, the folding door A is pivotally attached to one end portion of the door frame 1 so as to be rotatable. The movable side door panel 2 and the inner side edge of the rotary side door panel 2, the inner side opposite to the inner side edge is foldably connected by hinges 4, 4. The opening / closing device for the folding door A is provided between a rear surface of the upper end portion of the rotating side door panel 2 in the folding door A and a guide rail described later provided on the lower surface of the upper frame portion 1a of the door frame 1. 10 is installed.

  The door frame 1 is formed in a rectangular frame by connecting the upper and lower frame portions 1a and 1b between one end and the other end by vertical frame portions 1c and 1d, respectively. By attaching the frame 1 to an opening end of a closet or the like, a space part surrounded by the frame is formed in an open part of the closet or the like, and the opening is opened and closed by a folding door A.

  The rotating side door panel 2 and the moving side door panel 3 constituting the folding door A are formed in a vertically long rectangular shape in which the opening of the door frame 1 is divided into left and right sides, and the rotating side door The panel 2 is pivotally attached to the opposing surfaces of the upper and lower frame portions 1a and 1b of the door frame 1 by pivots 5 and 5, respectively, at the upper and lower ends of the one side end serving as the outer end. Yes, while the upper and lower support shafts 5 and 5 are fulcrums, the movable side door panel 3 has one side end as an inner end and the inner end as a pivot side door. The panel 2 is connected to the inner end of the panel 2 by hinges 4 and 4 so as to be foldable forward from the door frame 1, and the upper and lower frame portions of the door frame 1 are connected to the upper and lower ends of the outer end which is the other side end. The upper and lower runners 7a and 7b fitted in the upper and lower guide rails 6a and 6b provided on the opposing surfaces of 1a and 1b, respectively, The folding door A is configured to be opened and closed by pivotally supporting the upper and lower runners 7a and 7b in the horizontal width direction of the door frame 1 along the upper and lower guide rails 6a and 6b.

  As shown in FIGS. 5 to 9, the opening / closing device 10 of the folding door A is a horizontally long having a fixed length fixed to the outer end portion in the center portion in the width direction of the upper end portion of the back surface of the rotating side door panel 2. The base 11 is pivotally attached to the base 11 of the fixture 11 and the base 11 of the fixture 11 so that the base 11 is always separated from the fixture 11 by a spring 13 to be described later. A support pin 14 slidably fitted into an upper guide rail 6a provided on the lower surface of the upper frame 1a of the door frame 1 is projected from the top end of the door frame 1 toward the upper end. In addition, the fixing bracket 11 and the rotating bracket 12 are overlapped with each other against the force of the spring 13 at the distal ends of the fixing bracket 11 and the rotating bracket 12. Open the door frame 1 by folding the two door panels 2 and 3 and folding them up to The lock mechanism 20 that locks the opening when it is closed and the surface of the rotating side door panel 2 or the moving side door panel 3 is pressed from this state to release the lock. Is provided with an unlocking mechanism 30 that refracts the two door panels 2 and 3 toward the surface side to release the opening of the door frame 1. In the following description, the front side of the folding door A is the front side.

  The fixing bracket 11 in the opening / closing device 10 is a vertically long rectangular shape that is attached to the upper end of the rear surface of the door panel upward at the front edge of the horizontal plate portion 11a having a flat horizontally long rectangular shape that is long in the width direction of the door panels 2 and 3. While the plate portion 11b is projected, the rotary fitting 12 is a horizontal plate that is long in the width direction of the door panels 2 and 3 that can be superimposed on the horizontal plate portion 11a of the fixed fitting 11 with a small gap. A vertical wall portion 12b that protrudes upward from the rear edge of the arm portion 12a and faces the vertical plate portion 11b of the fixing bracket 11 with a space therebetween, and protrudes from the upper end of the vertical wall portion 12b. A horizontal projecting plate portion 12c is integrally projected from above the arm portion 12a. Note that the front-rear direction of the rotating metal fitting 12 refers to the direction in which the rotating metal fitting 12 is folded over the fixed metal fitting 11.

  Further, a base end portion of the horizontal plate portion 11 in the fixing metal fitting 11 and a base end portion of the arm portion 12a of the rotating metal fitting 12 which overlaps the base end portion with a certain interval are horizontally connected to each other by the pivot 15. One straight part that pivots in the direction of rotation and winds the central part of a spring 13 comprising a torsion spring around the pivot 15 and projects straight from both ends of the torsion part of the spring 13 13a and the other straight portion 13b (shown in FIG. 8) are pressed against and received by the opposing surfaces of the vertical plate portion 11b of the fixing bracket 11 and the vertical wall portion 12b of the rotating bracket 12, respectively. The rotary fitting 12 is biased with respect to each other in the direction of expanding (separating) around the pivot 15.

  Further, the support fin 14 projects upward from the tip of the horizontal projecting piece 12c of the rotary fitting 12, and the support pin 14 is provided on the lower surface of the upper frame 1a of the door frame 1. It is attached by externally fitting a rotating ring 16 composed of a bearing that rotates while sliding on the upper guide rail 6a.

  FIGS. 8 to 11 show a mechanism 20 that locks the opening side door panel 2 and the moving side door panel 3 so as to hold the closed state when the opening of the door frame 1 is closed by unfolding. As described above, the lock pin 21 disposed at the distal end of the horizontal plate portion 11a of the fixing bracket 11 and the lower surface of the distal end portion of the arm portion 12a of the rotating bracket 12 are secured to the arm pin. The guide member 22 is moved while being guided rearward from the front end edge side of the 12a toward the tip, and is protruded from the tip of the arm portion 12a, and the lock pin 21 is just before the lock pin 21 reaches the tip of the guide member 22. And a projecting piece 23 provided with a locking groove 24 for receiving and locking 21.

  More specifically, a central shaft 25 protrudes downward on the lower surface of the front end of the horizontal plate portion 11a of the fixing bracket 11, and the lock pin 21 protrudes upward on the outer periphery of the central shaft 25. The center portion of the circular rotating plate 26 is rotatably fitted, and further, the tip of the horizontal plate portion 11a has an arc shape that is long in the length direction of the horizontal plate portion 11a with the central axis 25 as the center. A long hole 27 is formed, and the lock pin 21 protrudes upward through the long hole 27. The rotating plate 26 has one end of a spring 28 formed of a coil spring disposed on the lower surface of the front end of the horizontal plate 11a fixed to the outer peripheral portion thereof, and the other end of the spring 28 is fixed to the lower surface of the horizontal plate 11a. The lock pin 21 is always moved toward the base end side of the horizontal plate portion 11a by the tensile force of the spring 28, and is rotated around the rotating plate 26 in a direction to be locked to the base end of the long hole 27. Power is given.

  Further, a spring receiver 25a is fixed to the lower end portion of the central shaft 25, and a spring 29 is disposed between the opposed surfaces of the spring receiver 25a and the rotating plate 26 in a compressed state. The moving plate 26 is pressed against the lower surface of the horizontal plate portion 11a of the fixing bracket 11.

  On the other hand, the guide member 22 fixed to the lower surface of the distal end portion of the arm portion 12a of the rotating metal fitting 12 is fixed so that it can intervene in the gap between the facing surfaces of the arm portion 12a and the horizontal plate portion 11a of the fixing metal fitting 11. The guide member 22 has a thickness and the base end portion is formed to have a width substantially equal to the width of the arm portion 12a, and faces the front end edge side which is one long side of the arm portion 12a. A vertical front surface is formed on a guide surface 22a that is curved in a gentle arc shape toward the rear from the base end portion toward the tip, and is provided on the guide surface 22a at the tip of the horizontal plate portion 11a in the fixing bracket 11. The lock pin 21 protruding from the elongated hole 27 is configured to be guided toward the tip of the guide surface 22a while being in sliding contact with the outer peripheral surface of the lock pin 21.

Further, the projecting piece 23 protrudes from the end of the arm portion 12a in the direction of extending the length of the arm portion 12a, and the guide surface 22a of the guide member 22 extends toward the tip of the lower surface of the projecting piece 23.
The tip end surface of the lock pin that is formed on the inclined lower surface 23a that is gently inclined toward the side and moves toward the tip of the guide member 22 along the guide surface 22a of the guide member 22 is the inclined lower surface 23a.
As the lock pin 21 enters and moves, the lock pin 21 is pressed and moved downward, and the front face U of the projecting piece 23 has an open plane U facing backward. Before the lock pin that moves on the guide surface 22a of the guide member 22 reaches the terminal end (tip) of the guide surface 22a by forming the above-described locking groove 24, the restoring force of the spring 29 is Thus, it is configured to project upward and be engaged with the locking groove 24.

  The lock release mechanism 30 for releasing the lock mechanism 20 configured as described above is provided with a pin passage groove 31 penetrating in the front-rear direction (width direction) of the guide member 22 on the lower surface of the distal end portion of the guide member 22. When the lock pin 21 is removed from the locking groove 24 along the tip of the guide surface 22a of the guide member 22, the lock pin 21 protrudes from the rotation plate 26 by the rotation of the spring 28. The lock pin 21 is moved to the rear end opening of the pin passage groove 31 so as to face the rear opening end of the passage groove 31. From this state, the lock pin 21 is moved to the pin passage groove 31. By making it pass toward the front, the fixed metal fitting 11 and the rotating metal fitting 12 are developed, and the folding door A is opened. Note that the pin passage groove 31 has a groove bottom, as shown in FIG. 16, in the direction in which the lock pin 21 passes, that is, from the rear end opening toward the front end opening that opens to the base end of the guide surface 22a. Is formed so as to gradually become shallower, and a portion of the guide surface 22a in which the groove is open is formed to have a surface width that allows the outer peripheral surface of the lock pin 21 to slide.

  The folding door opening and closing device 10 configured as described above is fixed with a screw or the like with the vertical plate portion 11a of the fixing bracket 11 being applied to the upper end of the back surface of the rotating side door panel 2 in the folding door A. On the other hand, the front end rotating ring 16 of the support hinge 14 protruding from the front end portion of the horizontal protrusion 12c of the rotating metal fitting 12 is slid on the guide rail 6a provided on the lower surface of the upper frame portion 1a of the door frame 1. It is mounted on the folding door A by being inserted freely.

  In the state where the turning side door panel 2 and the moving side door panel 3 of the folding door A are deployed in the same plane as shown in FIG. 3 and the opening of the door frame 1 is closed, the folding door opening and closing device The fixing bracket 11 and the rotating bracket 12 are folded in two against each other against the restoring force of the spring 13, and as shown in FIGS. 10 and 11, the horizontal plate portion 11a of the fixing bracket 11 A lock pin 21 that protrudes from the outer peripheral portion of the rotating plate 26 provided on the lower surface side of the distal end portion and protrudes upward through a long hole 27 formed in the horizontal plate portion 11a is provided on the rotating bracket 12. The fixing bracket 11 and the rotating bracket 12 are locked so that they cannot be deployed, regardless of the restoring force of the spring 13, by engaging with the locking groove 24 of the protruding piece 23 protruding from the tip of the arm portion 12a. Is maintained.

  In this locked state, the lock pin 21 reaches the distal end portion of the guide surface 22a of the guide member 22 fixed to the lower surface of the distal end portion of the arm portion 12a of the rotary fitting 12, and the outer peripheral surface thereof is received by the guide surface 22a. The rotating plate 26 that is stopped and protrudes with the lock pin 21 resists the force of the spring 28 due to the movement of the lock pin 21 from the proximal end side of the guide surface 22a to the tip end portion. The lock pin 21 is pressed onto the distal end portion of the guide surface 22a and curved in a long arc shape in the length direction of the horizontal plate portion 11a provided at the distal end portion of the horizontal plate portion 11a. It is located in the base end portion of the long hole 27.

  As described above, from the state in which the opening of the door frame 1 is closed by the folding door A, the surface of either the rotating side door panel 2 or the moving side door panel 3 in the folding door A is pressed by hand or the like. Then, when the hinge 4 portion is moved slightly rearward, the fixing bracket 11 is rotated slightly toward the rear about the pivot 15 with respect to the rotating bracket 12, and is provided at the front end side of the horizontal plate portion 11a. The outer peripheral surface of the lock pin 21 slides on the guide surface 22a of the guide member 22 while detaching from the tip of the guide surface 22a, and the rotating plate 26 projecting the lock pin 21 is a spring 28. The restoring force of the lock pin 21 is rotated in the direction of moving to the rear side of the guide member 22, and the lock pin 21 is instantaneously locked to the tip of the long hole 27 formed in the horizontal plate portion 11a. 12, as shown in FIG. 13, the rear end side opening of the pin passage groove 31 provided in the guide member 22 is opened. Become a state in which to face the end.

  When the pressing force against the folding door A is released in this state, the lock pin 21 passes forward through the pin passage groove 31 and the fixing bracket 11 and the rotating bracket 12 are moved as shown in FIGS. The opening of the door frame 1 is developed by the restoring force of the spring 13 around the pivot 15 and refracts the turning door panel 2 and the moving door panel 3 constituting the folding door A toward each other. Open the part. At this time, the support pin 14 projecting from the distal end portion of the rotating bracket 12 in the opening / closing mechanism 10 is rotated in the direction in which the rotating bracket 12 is deployed with respect to the fixed bracket 11 fixed to the rotating side door panel 2. As it moves, the refraction of the folding door A is refracted while smoothly moving in the guide rail 6a horizontally provided over the entire length of the lower surface of the upper frame 1a of the door frame 1 to refract the opening of the door frame 1. It can be opened.

  Next, by pressing the surface of the folding door A from the state in which the folding door A is opened and moving the moving side door panel 3 toward the other side end side of the door frame 1, When the movable door panel 3 is unfolded from each other and operated to close the folding door A, as the movable door panel 3 moves to the other side end of the door frame 1, The tip of the support pin 14 is moved to the other side end side along the upper guide rail 6a, and resists the force of the spring 13 against the fixing bracket 11 fixed to the rear upper end portion of the rotating side door panel 2. And turn in the folding direction.

  Then, as shown in FIG. 17, the folding device A is rotated until the folding door A is further pressed and closed from the folded state until the distal ends of the fixing bracket 11 and the rotating bracket 12 of the opening / closing device 10 are in contact with each other. A base end portion of the guide member 22 fixed to the lower surface of the distal end portion of the arm portion 12a of the bracket 12 is provided on the lower surface side of the distal end portion of the horizontal plate portion 11a of the fixing bracket 11 as shown in FIG. The lock pin 21 comes into contact with the outer peripheral surface of the lock pin 21 protruding upward from the outer peripheral portion of the rotating plate 26 through the long hole 27, and when the surface of the folding door A is further pressed from this state, the lock pin 21 is From the state of being locked to the base end of 27, the outer surface of the guide member 22 is pressed against the guide surface 22a of the guide member 22 against the force of the spring 28 pulling the rotating plate 26, and the guide surface 22a is moved to the front end side. The tip of this lock pin 21 As shown in FIG. 19, the surface abuts on the inclined lower surface 23a of the protruding piece 23 protruding from the tip of the arm portion 12a of the rotary fitting 12, and is provided on the protruding piece 23 along the inclined lower surface 23a. During the approach toward the locking groove 24, the inclined lower surface 23a causes the lock pin 21 to move downward in the axial direction together with the rotating plate 26 against the force of the spring 29 pressing the rotating plate 26 upward. When the locking groove 24 provided in the projecting piece 23 is reached, the outer peripheral surface is pressed against the tip of the guide surface 22a of the guide member 22 and is pushed up by the restoring force of the spring 29 to enter the locking groove 24. As shown in FIG. 20, it is locked to the groove bottom surface of the locking groove 24, and the fixing bracket 11 and the rotating bracket 12 are biased in the direction of deployment by the restoring force of the spring 13. Regardless, the lock state is maintained.

  In the above embodiment, the fixing bracket 11 in the folding door opening / closing mechanism 10 is attached to the upper rear end portion of the rotating side door panel 2 in the folding door A, but is attached to the upper rear end portion of the moving side door panel 3. However, the same operational effects as described above can be obtained. Further, the upper guide rail 6a of the door frame 1 is slid in the length direction of the rail at the front end of the rotating bracket 12 in the opening / closing mechanism 10. Since the support pin 14 that moves and moves is projected, the door panel to which the fixing bracket 11 is attached is a rotation-side door panel in which the outer end is pivotally attached to one end of the door frame 1. It may be a door panel in which the opening of the door frame 1 can be moved in the width direction as in the case of the moving side door panel. The fixing bracket 11 of the opening / closing mechanism 10 is attached to the rear upper end of one door panel. Attached, it is sufficient to slidably fitted to cause the support pins 14 which are protruded from the distal end portion of the rotating member 12 of the switching mechanism 10 to the upper guide rail 6a of the door frame 1.

A Folding door 1 Door frame 2 Rotating side door panel 3 Moving side door panel 4 Hinge
6a, 6b Vertical guide rail
10 Folding door opening and closing device
11 Fixing bracket
12 Rotating bracket
13 Spring
14 Support pin
15 Axis
16 Rotating ring
20 Locking mechanism
21 Lock pin
22 Guide member
22a Guide surface
23 Projection
23a Inclined bottom surface
24 Locking groove
26 Rotating plate
27 Long hole
28, 29 Spring

Claims (6)

  A folding door comprising a door frame, two door panels disposed on the door frame and foldably connected to open and close an opening of the door frame, and a door panel opening and closing device. The opening / closing device includes a horizontally long fixing bracket having a fixed length fixed to the upper rear end portion of one of the door panels, and a base end portion pivotally attached to the base end portion of the fixing bracket. At the same time, it is urged in a direction to always move away from the fixing bracket by a spring force, and is slidably fitted into the guide rail provided on the lower surface of the upper frame of the door frame upward at the tip. And a pivot fitting with a support pin protruding from it.Fold the end of the fixture and pivot bracket to the state where the fixture and pivot bracket overlap each other against the spring force. The two door panels are unfolded and the door frame opens When the door is closed, the lock mechanism is locked so that the opening is not releasable, and the lock is released by pressing the surface of the door panel from this state, and the two door panels are moved toward each other by the spring force. A folding door comprising a lock releasing mechanism that refracts and releases an opening of the door frame.   The fixing bracket is formed by projecting a vertical plate portion, which is attached to the upper end of the back surface of the door panel, upwardly on the front edge which is one long side edge side of the horizontal plate portion having a horizontally long rectangular shape. A vertical wall portion is provided on the rear end edge of the horizontal plate-shaped arm portion that can be overlapped with a small space on the horizontal plate portion of the fixing bracket, and an arm is provided at the upper end of the vertical wall portion. A horizontal projecting plate portion projecting upward is integrally provided, and a base end portion of the horizontal plate portion of the fixing bracket and a base end portion of the arm portion of the rotating metal fitting and the horizontal projecting plate portion overlapping on the base end portion. The central part of a spring consisting of a torsion spring is wound around this pivot, and both ends of this spring are respectively attached to the vertical plate part of the fixing metal and the side wall of the rotary metal. The fixed bracket and the rotating bracket are deployed to each other by pressing and receiving the plate portion. Folding door according to claim 1, characterized in that urges the direction.   The folding door according to claim 1, wherein a rotating ring that rotates while sliding on a side wall surface of the guide rail facing the guide rail is attached to the tip of the support pin.   The lock mechanism is pivotally attached to the lower surface of the front end of the horizontal plate portion of the fixing bracket, and is pressed against the lower surface of the horizontal plate portion by a spring force, and a lock pin protrudes upward from the outer peripheral portion. A rotating plate, and a circular arc that is long in the length direction of the horizontal plate portion that is drilled at the tip of the horizontal plate portion and passes the lock pin upward from the lower surface of the horizontal plate portion. A curved long hole, a spring that constantly biases the rotating plate in a direction in which the lock pin is locked to the proximal end of the long hole facing the proximal end of the horizontal plate portion, It is fixed to the lower surface of the distal end portion of the arm portion, and in a state where the outer peripheral surface of the lock pin is pressed, the lock pin is curved in a circular arc shape that guides from the rear side to the front side toward the front end of the arm portion. A guide member having a guide surface and a protrusion from the tip of the arm The lower surface is formed as an inclined lower surface that receives the front end surface of the lock pin entering along the guide surface of the guide member and presses and moves downward as the lock pin enters, and the lock pin 3. The folding door according to claim 1, further comprising: a protruding piece having a locking groove that receives and locks the lock pin before reaching the end of the guide surface of the guide member.   The lock release mechanism includes a pin passage groove that penetrates the guide member in the front-rear direction of the guide member, and the guide pin of the guide member passes through the opening end of the locking groove provided on the projecting piece. When the lock pin is locked to the base end of the long hole which is the original position by removing the end from the end and rotating the rotating plate by the restoring force of the spring, the lock pin is moved to the front opening end of the pin passage groove. 5. The folding door according to claim 1, wherein the folding door is configured to face the door.   6. The folding door according to claim 5, wherein the pin passage groove is formed so that the groove bottom gradually becomes shallower in a direction in which the lock pin passes.

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