JP2002276254A - Folding door and reverse folding prevention mechanism therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reverse folding prevention mechanism for a folding door and a folding door capable of preventing a folding door main body from reversely folding without requiring any special operation. SOLUTION: This reverse folding prevention mechanism 44 preventing the folding door main body 3 from reversely folding to the exterior B side is provided with a reverse fold preventing member 51, which is assembled to the lower end part of a folding connection part 35 freely movably in the vertically direction between a lower movement position facing a rail 16 in a sill 7 and an upper movement position retracted from the rail 16 and abutted on the rail 16 in the lower movement position for preventing the door main body from reversely folding, and upward and downward movement mechanisms 52 and 53 moving the reverse fold preventing member 51 to the lower movement position according to a terminal closing action of the folding door main body 3 and moving the reverse fold preventing member 51 to the upper movement position according to an initial opening action.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for preventing reverse folding of a folding door which is incorporated in a folding door which is disposed almost steplessly on a floor surface on the indoor side and a floor surface on the outdoor side in consideration of barrier-free. About.

[0002]

2. Description of the Related Art Hitherto, as this type of folding door, for example, one disclosed in Japanese Patent Application Laid-Open No. Hei 10-238196 which is applied to a folding door in a bathroom is known. In this folding door considering barrier-free, the upper frame is arranged with a step on the ceiling surface on the bathroom side and the ceiling surface on the undressing room side, but it is arranged on the floor surface on the bathroom side and the undressing room side. The lower frame is arranged with almost no step to the floor.

[0003]

In such a conventional folding door, the structure around the lower frame has no level difference.
There is no door stop that the folding door body contacts. For this reason, from the state where the folding door main body is closed and its latch is locked to the rail, if a force is further applied to the undressing room side, that is, in the reverse folding direction, the upper frame of the folding door main body receives the upper frame and reversely bends. However, the lower portion may be bent as it is, and the hinge mechanism of the connecting portion may be damaged. Similarly, when a plurality of folding doors are transported or stored in a stacked state, the load on the folding door may cause the lower folding door to be in a reverse-folded state, and the hinge mechanism may be damaged. However, in many Oridos, the Orito body is placed indoors (bathroom side).
A lock mechanism that locks from above is incorporated. If this lock mechanism is a locking operation, the above-described reverse bending can be prevented. However, forcing a user or an operator to perform a lock operation to prevent reverse folding is not realistic because there is a problem of forgetting the operation.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a folding door reverse prevention mechanism and a folding door which can effectively prevent the folding door body from being reversely folded with a simple structure and without requiring any special operation. And

[0005]

SUMMARY OF THE INVENTION A folding door preventing mechanism for a folding door according to the present invention comprises a folding door body having a lower frame which is disposed with almost no step on the indoor floor and the outdoor floor. The folding door is a reverse folding prevention mechanism that is incorporated in the folding connection portion, and that prevents the reverse folding of the folding door body to the outside of the door, a downward movement position facing the rail formed on the lower frame and an upward movement position retracting from the rail. Between the lower end of the foldable connecting portion so as to be vertically movable, and a reverse fold prevention member that abuts against the rail from the indoor side at the lower movement position to prevent reverse fold of the folding door body, and a reverse fold prevention member. A vertical movement mechanism that moves from the upper position to the lower position in conjunction with the final closing operation of the folding door body, and moves from the lower position to the upper position in conjunction with the initial opening operation. Features.

According to this configuration, when the reverse fold prevention member is moved from the upper position to the lower position by the vertical movement mechanism in conjunction with the final closing operation of the folding door body, the reverse fold prevention member faces the rail, The rail contacts the rail from the indoor side to prevent reverse folding of the folding door body. Conversely from this state, when the reverse fold prevention member is moved from the lower position to the upper position in conjunction with the initial opening operation, the reverse fold prevention member retracts from the rail. In the upward movement position where the reverse fold prevention member is retracted from the rail, even if the folding door body is folded inward and opened, the lower end of the reverse fold prevention member is disposed on the indoor floor surface without any step with the lower frame. No rubbing. That is, by keeping the folding door main body closed with respect to the frame, the reverse folding preventing member automatically faces the rail, and can prevent the folding door main body from being reversely folded. The blocking member moves upward and does not damage the floor surface on the indoor side.

In this case, the reverse folding prevention member includes a blocking member main body movably mounted on a lower edge portion of one of the connecting vertical frames constituting the folding connection portion, and the blocking member main body is moved toward the upward movement position. A biasing spring, and the vertical movement mechanism has a fixed cam member fixed to the lower edge of the other connecting vertical frame forming the folding connection portion, and a movable cam member fixed to the blocking member main body, The fixed cam member and the movable cam member are separated from each other as the folding door body is opened and closed, and the blocking member body urged by the spring is moved between the upper movement position and the lower movement position by the cam action by the mutual cam slopes. Is preferred.

According to this structure, when the folding door main body is closed (final closing operation), the fixed cam member and the movable cam member come close to each other, and the movable cam member is formed on the fixed cam member by the mutual cam slope. The cam action causes the spring to move downward against the spring. With the movement of the movable cam member, the blocking member body fixed to the movable cam member moves to the lower movement position. Conversely, when the folding door main body is opened (initial opening operation), the fixed cam member and the movable cam member are separated from each other, and the movable cam member acts on the fixed cam member by the cam action and spring force of the mutual cam slope. Moves upward. With the movement of the movable cam member, the blocking member main body moves to the upward movement position. In this way, using the left and right connecting vertical frames (folding connecting portions) that rotate relative to each other about the hinge portion as the folding door body opens and closes,
By configuring the inclined cam mechanism, the blocking member main body can be moved reliably and smoothly.

In this case, the blocking member body accommodates a contact member having a projection formed at the lower end thereof to be in contact with the rail from the indoor side, and slidably accommodates the contact projection so that the contact projection protrudes and retracts downward. It is preferable to have a holder which is held by the holder and a pressing spring which is accommodated in the holder and urges the contact projection downward.

According to this structure, the contact member having the contact protrusion is urged downward by the pressing spring, so that when an unexpected reverse bending force is applied to the folding door main body, the pressing spring is moved. It functions to absorb this reverse bending force. For this reason,
It is possible to effectively prevent the folding door body from being damaged against a large reverse bending force.

In this case, it is preferable that a latch projection is formed at the lower end of the contact member so as to be engaged with and disengaged from the rail with a gap corresponding to the thickness of the rail.

According to this configuration, the latch projection provided in addition to the contact projection allows the reverse break prevention mechanism to also serve as the latch mechanism, and the number of components can be significantly reduced.

[0013] In these cases, it is preferable that a partial seal member that seals the folded connection portion in close contact with the rail is attached to the lower end of the fixed cam member and the lower end of the movable cam member, respectively.

According to this structure, a pair of partial sealing members are provided at the bent connecting portion of the folding door main body which is structurally difficult to seal, so that this portion can be reliably and stably sealed. it can.

A folding door according to the present invention is characterized in that the folding door has a mechanism for preventing reverse folding of the folding door according to any one of the first to fifth aspects.

According to this configuration, by closing the folding door main body with respect to the frame, reverse folding of the folding door main body can be automatically prevented, and at the time of the opening operation of the folding door main body, the reverse folding preventing member is provided. There is no damage to the indoor floor. Therefore, even when the lower frame is disposed on the floor surface on the indoor side and the floor surface on the outdoor side with a barrier-free design that is arranged with almost no level difference, it functions particularly effectively, and even when carrying or storing by stacking, Damage to the folding door body can be effectively prevented.

Another folding door according to the present invention is a folding door in which a latch mechanism is incorporated in a folding connection portion of a folding door main body which is attached to a frame so as to be openable and closable. A latch projection that is disengaged from the latch projection, and a contact projection that faces the rail with a gap corresponding to the thickness of the rail and abuts on the rail from the indoor side to prevent reverse folding of the folding door body. And

According to this configuration, since the latching mechanism of the folding door main body which is engaged with and disengaged from the rail of the lower frame is provided with the contact projection facing the latch projection, the folding door main body is utilized by utilizing the latch mechanism. Can be configured very simply and at low cost.

Another folding door of the present invention is a frame, a folding door main body which is attached to the frame so as to be openable and closable, and a reverse folding which is incorporated in a folding connection portion of the folding door main body to prevent the folding door main body from being reversely bent to the outside of the room. A folding door, wherein the folding door main body is guided by rails formed on the frame body, wherein the folding body is provided with a step-down mechanism and the lower frame of the frame body is disposed with almost no step relative to the floor surface on the indoor side and the floor surface on the outdoor side; The reverse folding prevention mechanism is opened and closed via a rotatable gravity hinge with respect to the frame body, and has a contact projection that abuts the rail from the indoor side and prevents reverse folding of the folding door main body when the folding door main body is closed. It is characterized by doing.

According to this structure, when the folding door body is closed, the contact projection of the reverse folding prevention mechanism abuts on the rail of the frame from the indoor side, thereby preventing the folding door main body from being reversely folded. On the other hand, the folding door body is opened and closed while being guided by the rail of the frame and sliding and rotating via the gravity hinge, so that the folding door body slightly moves upward by the opening operation,
It moves down slightly due to the closing action. Therefore, when the folding door main body is opened from the closed state where the contacting projection abuts on the rail, the contacting projection moves upward together with the folding door main body (folding connecting portion), and the floor surface on the indoor side may be damaged. There is no.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a folding door for a folding door according to an embodiment of the present invention; The bathroom with this folding door is composed of a unit bath with a barrier-free design with no steps between it and the dressing room.
The lower frame of the folding door also has a structure with almost no steps between the bathroom floor and the dressing room floor. As shown in the figure of FIG. 1, the longitudinal sectional view of FIG. 2, and the transverse sectional view of FIG. 3, the folding door 1A is a folding door main body 3 including a frame 2 and a door-side door 3a and a door-side door 3b.
The door-side door body 3a and the door-side door body 3b are connected to the bathroom A side via the connecting member 4 so as to be able to bend freely in the abutting state.

The frame 2 is constituted by an upper frame 6, a lower frame 7, and both vertical frames 8, 8 which are made of an aluminum material or the like. The upper frame 6 has an upper frame main body 10 formed in a substantially “L” shape, an upper guide rail 11 vertically installed on the bathroom A side of the upper frame main body 10, and a vertical hanging rail on the undressing room B side of the upper frame main body 10. It is integrally formed with the upper frame seal mounting piece 12 provided. An upper seal member 13 extending toward the folding door main body 3 is attached to the upper frame seal attachment piece 12.

Similarly, the lower frame 7 is provided on the lower frame main body 15 having a hollow portion, the lower guide rail 16 erected on the bathroom A side of the lower frame main body 15, and the undressing room B side of the lower frame main body 15. And the lower seal mounting portion 17. A first lower seal member 18 on the bathroom A side and a second lower seal member 19 on the undressing room B side extending toward the folding door main body 3 are mounted on the lower seal mounting portion 17. In this case, the lower frame 7
Is disposed on the lower frame main body 15 so as to be placed on a stepped edge Pa formed on the waterproof pan P of the bathroom A.

The left and right vertical frames 8 are provided on the bathroom A side of the vertical frame main body 21 in which the bathroom A side is bent into a frame shape to form a substantially "L" shape as a whole. The vertical frame seal mounting portion 22 and the vertical frame seal mounting piece 23 protruding from the vertical frame main body 21 on the undressing room B side are integrally formed. A vertical seal member 24 extending toward the bathroom side portion of the folding door main body 3 is attached to the vertical frame seal attachment portion 22,
The vertical frame seal mounting piece 23 has a seal attachment 25 having seal pieces fixed to both outer ends thereof. The upper seal member 13, the first and second lower seal members 18, 19, the vertical seal member 24, and the seal attachment 25 seal the space between the folding door main body 3 and the frame 2 over four rounds. .

The door-side door 3a and the door-side door 3b are
A vertical frame 34 and a connecting vertical frame 35 are provided on an upper frame 31, a lower frame 32, and a middle rail 33, all of which are formed of aluminum profiles.
And the upper and lower panels 3 made of resin
6, 36 are fitted. Each door 3a, 3
In the lower frame 32b, a bathroom-side sealing piece 38 is provided at the lower end of the bathroom A, and a bathroom-side sealing piece 38 is provided at the connecting portion (folding connecting portion) of the left and right doors 3a, 3b. Two partial seal pieces 39 are attached so that the outer ends overlap (the details will be described later).

The middle bar 33 is integrally formed with a pulling portion 41 on the undressing room B side, and a towel rack 4 serving as a puller on the bathroom A side.
2 are installed. Lower frame 32 of each door body 3a, 3b
Has a ventilation gallery 43 with an opening / closing mechanism for communicating between the interior and exterior.
Are formed. In addition, the connecting vertical frame 3 of the doorside door 3a
A latch mechanism 47 is provided at the upper end of the connecting frame 5, and the connecting vertical frames 35, 35 of the door-side and door-side double doors 3a, 3b are latched between the lower ends of the connecting vertical frames 35, 35. A reverse break prevention mechanism 44 also serving as a mechanism is incorporated (see FIG. 1). Further, a closing lock mechanism 45 is incorporated at the upper end of the connecting vertical frame 35 of the door bottom side door 3b.
a, 3b vertical frames (door vertical frame and door bottom vertical frame) 34, 34
A detaching mechanism 46 for detaching an upper slider 49a, which will be described later, from the upper guide rail 11 is incorporated in the upper end portion.

The upper and lower pin hinges (gravity hinges) are provided on the vertical frame 34 of each of the door bodies 3a and 3b on the door end side and the door bottom side.
An upper slider 49a and a lower slider 49b are respectively attached via 48, 48, and each door body 3a, 3b is slidable on the upper guide rail 11 and the lower guide rail 16 by the upper slider 49a and the lower slider 49b, respectively. Supported. However, the upper and lower sliders 49a and 49b of the door bottom door 3b are fixed to the upper and lower guide rails 11 and 16, respectively. In addition, since the pin hinge is constituted by the gravity hinge, each door 3a,
3b moves up slightly with the opening operation and moves down slightly with the closing operation.

Next, with reference to FIG. 4, a description will be given of the reverse folding prevention mechanism 44 incorporated between the connecting vertical frames 35, 35 of both the door-side and door-side doors 3a, 3b. The reverse fold prevention mechanism 44 includes a reverse fold prevention member 51 and a reverse fold prevention member 5 incorporated at the lower end of the connecting vertical frame 35 of the doorside door body 3a.
1 is a movable cam member 52 fixed to the bathroom side finding surface, and a fixed cam member 53 fixed to the lower end of the connecting vertical frame 35 of the door end side door 3b. The movable cam member 52 and the fixed cam member 53 are arranged on the bathroom A side of both connecting vertical frames 35, 35 so as to be arranged side by side. Note that the reverse break prevention member 51 substantially also functions as a latch mechanism.

The fixed cam member 53 is fitted into the lower end portion of the connecting vertical frame 35, and is fixed to the fitting section 55 so as to protrude from the bathroom A side to be exposed on the bathroom side finding surface of the connecting vertical frame 35. It is composed of a cam plate 56 and a partial sealing piece 39 which is vertically provided at the lower end of the fixed cam plate 56. The fitting fixing portion 55 is fitted into the lower edge of the rectangular hollow portion 35a located in the middle of the connecting vertical frame 35, and is screwed to the connecting vertical frame 35 from the bathroom A side in this state. The fixed cam plate 56 has a substantially square front shape, and has a downward cam slope (almost 45 °) 57 formed at a lower portion on the movable cam member 52 side.

The reverse break prevention member 51 is provided with a fixed block 59 fixed to the connecting vertical frame 35 and a holder 60 engaged with the fixed block 59 so as to be vertically slidable (vertically movable).
An upper spring 61 housed in the upper portion of the holder 60 and receiving the fixed block 59 to urge the holder 60 upward;
It comprises a latch-like member (contact member) 62 which is housed in a lower part of the holder 60 so as to be freely retractable, and a latch spring 63 which receives the holder 60 and urges the latch-like member 62 downward. A movable cam member 52 is fixed to a lower portion of the holder 60 on the bathroom A side.

The holder 60 is loosely fitted in the lower edge of the rectangular hollow portion 35a located in the middle of the connecting vertical frame 35, and is slidably supported by the fixed block 59 inside the upper and lower middle portions thereof. The fixing block 59 has a holder 6 on the bathroom A side.
0, and the bathroom A
Screwed from the side. The upper moving spring 61 is constituted by a coil spring interposed between a projection 65 formed on the upper end of the fixed block 59 and a projection 66 formed on the lower surface of the top plate of the holder 60. The holder 60 on which the movable cam member 52 is mounted is urged upward.

The latch-like member 62 is guided inside the lower end of the holder 60 and is slightly vertically movable (slidable).
The member main body 67, a shaft portion 68 that extends slightly bent upward from the member main body 67, and a latch protrusion 69 and a contact protrusion 70 projecting downward at a lower end portion of the member main body 67, It is formed integrally. The latch spring 63
The latch-shaped member 62 is attached so as to be wound around the shaft portion 68 of the latch-shaped member 62, and receives the intermediate portion of the holder 60.
Is urged downward.

The latch protrusion 69 and the contact protrusion 70 face each other in parallel with a gap substantially corresponding to the thickness of the lower guide rail 16, and the latch protrusion 69 is located on the undressing room B side. Is located on the bathroom A side. The latch projection 69
The lower guide rail 1 is formed with an inclined surface on the bathroom A side and the undressing room B side, and has an inverted mountain shape (angle shape) cross section.
6 is disengaged from the bathroom A side, and the folding door main body 3 is kept closed. The contact protrusion 70 is formed in a convex shape in cross section, and is provided on the lower guide rail 16 from the bathroom A side in a state where the latch protrusion 69 is engaged with the lower guide rail 16, and the undressing room of the folding door main body 3. Prevents reverse bending to the B side.

On the other hand, the holder 60 on which the latch-like member 62 is mounted is guided by the fixed block 59 while being urged by the upper moving spring 61, and slides vertically between the upper moving position and the lower moving position. It has become. In this case, in the lower movement position, the latch protrusion 69 and the contact protrusion 70 face the lower guide rail 16 from above, and in the upper movement position, the latch protrusion 6
9 and the contact protrusion 70 are retracted upward from the lower guide rail 16. That is, only in the lower position, the latch protrusion 69
Can be engaged with and disengaged from the lower guide rail 16, and the contact projection 70 contacts the lower guide rail 16 so as to prevent reverse bending.

The movable cam member 52 is provided at a lower portion on the bathroom side of the reverse break preventing member (holder 60) 51 and is exposed to the bathroom side finding surface of the connecting vertical frame 35, and a lower end of the movable cam plate 72. And a partial sealing piece 39 vertically extending so as to extend longitudinally. The movable cam plate 72 has a substantially rectangular front shape, and has an upward cam slope (almost at an angle of 45 °) at the lower portion on the fixed cam member 53 side.
3 are formed. The partial seal piece 39 of the fixed cam member 53 and the partial seal piece 39 of the movable cam member 52
When the folding door main body 3 is closed, the lower frame 7 and the lower frame 32 are disposed so as to partially overlap each other, together with the bathroom-side sealing piece 38.
Seal between

The fixed cam member 53 and the movable cam member 52 protrude toward the bathroom A (see FIG. 2), and are separated by the folding door body 3 being folded (open), and are developed linearly (closed). ) By contact. That is, the downward cam slope 57 of the fixed cam member 53 and the upward cam slope 73 of the movable cam member 52 gradually move away when the folding door main body 3 is opened, and gradually approach when the closing operation is performed.

More specifically, the movable cam member 52 is vertically slidable via a holder 60 and is urged upward by an upper moving spring 61. The two cam slopes 57, 7 going away
The movable cam member 52 moves to the upper movement position with respect to the fixed cam member 53 by the cam action of 3 and the spring force of the upper movement spring 61. Conversely, in the final closing operation of the folding door main body 3, the upper moving spring 6 is actuated by the cam action of the two cam slopes 57 and 73 approaching.
The movable cam member 52 moves to the lower movement position with respect to the fixed cam member 53 against the spring force of one.

That is, in the initial opening operation of the folding door main body 3,
The latch projection 69 and the contact projection 70 are movable
And the latch projection 69 and the contact projection 70 face the lower guide rail 16 via the movable cam member 52 in the final closing operation. Therefore,
The latch projection 69 and the contact projection 70 perform the locking function and the reverse bending preventing function when the folding door main body 3 is closed or close to this.

In such a configuration, when the folding door main body 3 is completely closed, the latch projection 69 and the contact projection 70 are provided.
Is in the lower movement position, and the latch projection 69 is located on the lower guide rail 1.
6, the folding door main body 3 is held in the closed posture, and the contact projection 70 contacts the lower guide rail 16 to prevent the folding door main body 3 from being reversely folded toward the undressing room B side. For this reason, even if a strong force is applied to the lower part of the folding door main body 3 from the bathroom A side, the folding door main body 3 is not bent to the undressing room B side, so that damage to the connecting member 4 and the like can be prevented. This can also prevent the folding door main body 3 from being damaged due to reverse folding, even when transporting or storing the folding doors 1A in a stacked state.

On the other hand, when the opening of the folding door body 3 is started, the latch projection 69 and the contact projection 70 move to the upward movement position. For this reason, the latch projection 69 and the contact projection 70 do not rub against the floor surface (waterproof pan P) of the bathroom A configured without a step, and it is possible to effectively prevent the floor surface from being damaged. It should be noted that the reverse break prevention mechanism 44 of the embodiment also serving as the latch mechanism can be considered to be formed by forming the contact projection 70 on the latch body of the latch mechanism.

By the way, as described above, in this embodiment,
Since the gravity hinge is used, each door 3a, 3b
Moves upward with the opening operation and moves downward with the closing operation. Therefore, separately from the latch mechanism, the reverse bending prevention member 51 (the cam member 52,
The configuration without the 53) may constitute the reverse break prevention mechanism 44. That is, the contact protrusion 70 is moved up and down together with each of the doors 3a and 3b, thereby enabling contact with the lower guide rail 16 (reverse bending prevention) and prevention of damage to the floor surface (waterproof pan P).

Next, a second embodiment will be described with reference to FIGS. In the following description, the first
Only parts different from the embodiment will be described. The folding door of this embodiment is a hanging folding door 1B of a top hanging type, and the folding door main body 3 includes:
The frame 2 is opened and closed while being suspended from the upper frame 6. in this case,
A latch engaging piece 81 is formed on the upper frame 6 instead of the upper guide rail 11, and a hanging wheel guide 82 having a “C” -shaped cross section is integrally formed on the bathroom A side. In addition, lower frame 7
Is formed with a lower guide rail 83 whose upper portion is bent substantially at right angles to the undressing room B side.

Further, a suspending member 84 is provided in place of the upper slider 49a incorporated in the vertical frame 34 of each of the doors 3a, 3b.
A swing wheel 85 that is rotatably locked is mounted rotatably, and a hinge pin 86 is mounted below. Similarly, the lower slider 87 incorporated in the vertical frame 34 of each of the doors 3a and 3b is slidably locked at its lower end from the undressing room B side to the lower guide rail 83. In the hanging folding door 1B, the latch mechanism 88 is incorporated at the upper end of the connecting vertical frame 35 of the doorside door 3a.
It is adapted to be engaged with and disengaged from the latch engaging piece 81 described above.

FIG. 7 shows a state in which this hanging folding door 1B is incorporated.
The reverse break prevention mechanism 44. As described above, in the second embodiment, the latch mechanism 88 is incorporated only at the upper end of the connecting vertical frame 35, and the reverse break prevention mechanism 44 of the second embodiment is used.
Does not double as a latch mechanism like the reverse folding prevention mechanism 44 of the first embodiment. More specifically, in the reverse break prevention mechanism 44 of the second embodiment, the latch protrusion 69 is not formed on the latch member 62. However, the other parts have substantially the same structure as the reverse folding prevention mechanism of the first embodiment. Therefore, the description of the reverse folding prevention mechanism is as follows.
It is left to the first embodiment.

As described above, according to the second embodiment, as in the first embodiment, when the folding door main body 3 is completely closed, the contact protrusion 70 is at the lower movement position, and the contact protrusion 70 Abuts against the lower guide rail 83 to prevent the folding door main body 3 from being reversely folded toward the undressing room B side. For this reason, even if a strong force is applied to the lower part of the folding door main body 3 from the bathroom A side, the folding door main body 3 is not bent to the undressing room B side, so that damage to the connecting member 4 and the like can be prevented. This can also prevent the folding door main body 3 from being damaged due to reverse folding, even when transporting or storing the plurality of hanging folding doors 1B in a stacked state.

On the other hand, when the opening of the folding door main body 3 is started, the contact protrusion 70 moves to the upward movement position. For this reason, the contact protrusion 70 does not rub against the floor surface (waterproof pan P) of the bathroom A configured without a step, and it is possible to effectively prevent the floor surface from being damaged. The latch spring 63 in the first and second embodiments has a function of absorbing an excessive force applied to the contact protrusion 70 from the bathroom A side. Therefore, even in the reverse bending prevention mechanism 44 of the second embodiment without the latch projection 69, the latch spring 63 functions effectively.

In this embodiment, the folding door for the bathroom has been described. However, it is needless to say that the invention can be applied to a folding door having a barrier-free design (without steps) such as a folding door for a shower room. Further, in the present embodiment, the structure in which the reverse fold prevention member moves up and down with respect to the folding door main body is used. However, the structure may be such that the reverse fold prevention member moves up and down together with the folding door main body. ).

[0048]

As described above, according to the folding door reverse folding mechanism of the present invention and the folding door provided with the same, when the folding door main body is closed, the reverse folding preventing member moves down to face the rail, and the folding door main body is inverted. Breaking can be prevented, and when the folding door main body is opened, the reverse bending preventing member does not move upward and does not damage the indoor floor. Therefore, it is possible to prevent reverse folding of the folding door body and damage to the indoor floor without requiring any special operation. Therefore, usability is good in a folding door in which the lower frame is disposed with almost no step on the floor surface on the indoor side and the floor surface on the outdoor side. Damage to the folding door body can be effectively prevented.

Further, according to the other folding door of the present invention, the latch mechanism can be effectively utilized, and the reverse folding prevention mechanism required for the folding door body can be configured very simply and at low cost.

Further, according to the other folding door of the present invention, the gravity hinge can be effectively used, and the reverse folding prevention mechanism required for the folding door body can be configured extremely simply and at low cost.

[Brief description of the drawings]

FIG. 1 is a view of a folding door incorporating a reverse folding prevention mechanism according to an embodiment of the present invention, as viewed from the bathroom side.

FIG. 2 is an enlarged vertical sectional view of the folding door according to the first embodiment.

FIG. 3 is an enlarged cross-sectional view of the folding door according to the first embodiment.

FIG. 4 is a structural diagram of a reverse break prevention mechanism according to the first embodiment.

FIG. 5 is an enlarged vertical sectional view of a hanging folding door according to a second embodiment.

FIG. 6 is an enlarged transverse sectional view of a folding door according to a second embodiment.

FIG. 7 is a structural diagram of a reverse break prevention mechanism according to a second embodiment.

[Explanation of symbols]

1A folding door, 1B hanging folding door, 2 frames, 3 doors, 3
a Door side door body, 3b Door bottom side door body, 4 connecting members, 7
Lower frame, 16 lower guide rail, 32 lower frame, 34 vertical frame, 35 connecting vertical frame, 39 partial seal piece, 44 reverse break prevention mechanism, 51 reverse break prevention member, 52 movable cam member, 53 fixed cam member, 57 downward Cam slope, 60
Holder, 61 Upper moving spring, 62 Latch member, 63
Latch spring, 69 latch projection, 70 contact projection, 7
3 Upward cam slope, A bathroom, B dressing room

Claims (8)

[Claims] 1. A folding door in which a lower frame of a frame body is disposed with almost no level difference between a floor surface on the indoor side and a floor surface on the outdoor side, is incorporated into a folding connection portion of the folding door main body, and is directed to the outdoor side of the folding door main body. A reverse folding prevention mechanism for a folding door that prevents reverse folding of the folding connection, between a lower movement position facing a rail formed on the lower frame and an upper movement position retracted from the rail, A reverse folding prevention member that is incorporated so as to be able to move up and down and abuts the rail at the lower movement position from the indoor side to prevent reverse folding of the folding door main body; A vertical movement mechanism that moves from the upward movement position to the downward movement position in conjunction with an operation, and moves from the downward movement position to the upward movement position in conjunction with the initial opening operation. Reverse folding prevention mechanism of folding door. 2. The reverse folding prevention member includes a blocking member main body movably mounted on a lower edge portion of one of the connecting vertical frames constituting the folding connection portion, and the blocking member main body is moved to the upper movement position. A spring that biases the movable cam, the vertical movement mechanism comprising: a fixed cam member fixed to a lower edge of the other connecting vertical frame forming the folding connection portion; and a movable cam fixed to the blocking member body. The fixed cam member and the movable cam member are separated from each other with the opening and closing of the folding door main body, and the blocking member main body urged by the spring is actuated by a cam action by mutual cam slopes. The mechanism for preventing reverse folding of a folding door according to claim 1, wherein the mechanism is moved between an upper movement position and the lower movement position. 3. The contact member having a contact protrusion formed at a lower end portion thereof to contact the rail from the indoor side, and the contact protrusion so that the contact protrusion protrudes and retracts downward. 3. A mechanism for preventing reverse folding of a folding door according to claim 2, further comprising: a holder that slidably accommodates the slidable member; and a pressing spring that is accommodated in the holder and urges the contact protrusion downward. 4. A latch projection, which is formed at a lower end portion of the contact member so as to be engaged with and disengaged from the rail with a gap corresponding to the thickness of the rail with respect to the contact projection. The mechanism for preventing reverse folding of a folding door according to claim 3. 5. A partial seal member, which is in close contact with the rail and seals the folding connection portion, is attached to a lower end of the fixed cam member and a lower end of the movable cam member, respectively. Item 5. The mechanism for preventing reverse folding of a folding door according to item 2, 3 or 4. 6. A folding door, comprising the folding door reverse folding prevention mechanism according to any one of claims 1 to 5. 7. A folding door in which a latch mechanism is incorporated in a folding connection portion of a folding door body that is openably and closably attached to a frame, wherein the latch mechanism engages and disengages from a room side with a rail formed on a lower frame of the frame. A latch projection, and a contact projection that faces the latch projection with a gap corresponding to the thickness of the rail, and abuts the rail from the indoor side to prevent reverse folding of the folding door body. Orito. 8. A frame, a folding door body openably and closably attached to the frame, and a reverse folding prevention mechanism incorporated in a folding connection portion of the folding door main body to prevent the folding door main body from reverse folding to the outside of the room. And a folding door in which the lower frame of the frame is disposed with almost no step relative to the floor surface on the indoor side and the floor surface on the outdoor side, wherein the folding door body is guided by a rail formed on the frame, and The folding door is opened and closed via a rotatable gravity hinge with respect to the frame, and the reverse folding prevention mechanism abuts the rail from the indoor side in a state where the folding door main body is closed to prevent reverse folding of the folding door main body. An folding door having a contact projection.