JP2006009291A - Airtight structure of folding door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an airtight structure and a fireproof structure superior in durability with a simple structure, against an upper part of a folding door composed of two doors of a different width dimension. <P>SOLUTION: This upper airtight structure of the folding door is composed of a large door 1 and a small door 2; and is composed of a first airtight member 6 installed in a door tip side part of a door frame upper frame and brought into close contact with an upper end part of a door tip side half part of the large door 1 when closing the folding door, a second airtight member 17 installed in an upper end part of a door end side half part of the large door 1 and brought into close contact with the door frame upper frame when closing the folding door and a third airtight member 18 installed over the substantially total length of an upper end part of the small door 2 and brought into close contact with the door frame upper frame when closing the folding door. A door end side end part of the first airtight member 16 and a door tip side end part of the second airtight member 17, and a door end side end part of the second airtight member 17 and a door tip side end part of the third airtight member 18 respectively overlap with each other. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a folding door, and more particularly to an airtight structure of a folding door having two doors having different width dimensions.

The folding door is structurally smaller in size than the hinged door, and can provide a wide effective opening. In addition, there is an advantage that a door pocket space like a sliding door is not required and the door is lightly opened and closed. Therefore, the folding door is suitable for a wheelchair user or the like.

Conventional folding doors generally do not have fireproofing performance and confidentiality, so they are generally used for indoor toilet doors. Therefore, when adopting a folding door for an apartment entrance door or the like, it is necessary to provide the folding door with fireproof performance and airtightness performance.

Here, some folding doors are composed of two doors having the same width dimension, and others are composed of two doors having different width dimensions. In the former case, since the door end of the door does not protrude from the opening, an airtight structure / fireproof structure can be applied between the opening frame and the frame relatively easily. Since the door tip side of the door protrudes from the opening and moves, it is difficult to apply an airtight structure and a fireproof structure.

Patent Literature 1 and Patent Literature 2 disclose a hermetic structure / fireproof structure of a folding door composed of two doors having different width dimensions. However, the means disclosed therein are provided with an airtight member extending in the opening width direction on the door frame so as to be rotatable up and down, and the structure of the airtight member becomes complicated, and each time the folding door is opened and closed. Durability is poor because the airtight member rotates. Further, since the airtight member needs to easily rotate when the door is opened, the airtight member cannot be strongly pressed against the door body, which causes a problem in airtightness.
Japanese Patent No. 3452905 JP 2002-327584 A

It is an object of the present invention to provide an airtight structure and a fireproof structure that are simple in structure and excellent in durability with respect to the upper part of a folding door composed of two doors having different width dimensions. It is.

The technical means adopted by the present invention in order to achieve such a problem is an airtight structure of a folding door composed of a large door and a small door, wherein the door end side end portion of the large door and the door end side of the small door The end of the small door is pivotally connected, the end of the small door is pivotally attached to the vertical frame of the door frame, and the large door is positioned in the opening width direction at the intermediate portion in the width direction of the upper end portion. It is rotatably attached to a roller shaft of a movable suspension roller, and the large door is divided into a door end side half and a door bottom side half across the roller shaft, and the airtight structure is A first airtight member that is attached to a door tip side portion of the upper frame of the door frame and is in close contact with a half of the door tip side of the upper end of the large door when the folding door is closed; Attached to the half and attached to the second airtight member that is in close contact with the upper frame of the door frame when the folding door is closed, and substantially the entire length of the upper end portion of the small door, and closes to the upper frame of the door frame when the folding door is closed. Composed of the third airtight member. By doing so, the first airtight member seals the portion from the door end side end of the upper end of the large door to the roller shaft mounting portion when the folding door is closed, and the second airtight member is The part from the roller shaft mounting part to the door edge side end is sealed, and the third airtight member is substantially the entire length in the width direction of the small door (the part from the door end side edge to the door edge side edge of the small door). Is sealed.

Preferably, when the folding door is closed, the door bottom side end of the first airtight member and the door tip side end of the second airtight member, the door bottom side end of the second airtight member, and the third airtight member The door end side ends overlap each other.

In one preferred embodiment, the door bottom side end portion of the first airtight member and the door end side end portion of the second airtight member are configured to overlap each other by receiving the other end portion in one end portion. When the folding door is closed, the large door rotates around the roller shaft that slides and moves to the door end side, so that the second airtight member provided on the door bottom side half of the large door The door end side end portion overlaps while sliding with respect to the door end side end portion of the first airtight member.

In one preferable aspect, the door bottom side end portion of the second airtight member and the door tip side end portion of the third member are configured to overlap each other by receiving the other end portion in one end portion. When the folding door is closed, the large door pivots around the roller shaft that slides and moves toward the door tip side, and is linked to the pivot of the large door through the fixed pivot fulcrum on the door bottom side. As the small door rotates, the other end overlaps one end.

Since the airtight structure of the upper part of the folding door is achieved by using an airtight member fixed to the frame body or the door body instead of a movable airtight member, the airtight member does not rotate when the folding door is opened and closed. The durability and airtightness of the member are good.

In the case where the ends of each airtight member overlap each other, the upper part of the folding door can be formed in a phased shape, and although it is a divided airtight member, it has the same fireproof performance as a single airtight member Have

In the case where the dimensions of the end portions of the airtight member are made different so that one can receive the other, the end portions of the airtight members can be overlapped without making the structure of the airtight member particularly complicated. Can do.

FIG. 1 is a front view of a folding door according to the present invention as viewed from the outdoor side, and FIG. 2 is a front view of the folding door according to the present invention as viewed from the indoor side. The folding door has a large door 1 and a small door 2 that are rotatably connected to each other, and is configured to open and close a building opening formed by a door frame by the large door 1 and the small door 2. The door frame is composed of a rectangular opening frame body including an upper frame 30, a lower frame 31, and left and right vertical frames 32, 33. In the illustrated example, the vertical frame 32 is a door-end side vertical frame, a vertical frame. Reference numeral 33 denotes a vertical frame on the door bottom side. As shown in FIG. 3, the upper frame 30 has an indoor side surface portion 300 and a lower surface portion 301 that faces the upper end surfaces 10 and 20 of the large door 1 and the small door 2.

The large door 1 has a front-view shape, and a prospective surface thereof includes an upper end portion 10, a lower end portion 11, and left and right side end portions 12 and 13, and the finding surface is an indoor side surface. It is comprised from the part 14 and the outdoor side surface part 15. FIG. The small door 2 has a front-view shape, and its prospective surface is composed of an upper end portion 20, a lower end 21, and left and right side ends 22, 23. And the outdoor side surface portion 25. The large door 1 and the small door 2 have the same height dimension, but the width dimension of the large door 1 is larger than the width dimension of the small door 2. In the folding door consisting of the large door 1 and the small door 2, the door end side end 12 of the large door 1 is the door tip side as the entire folding door, and the door bottom side end 23 of the small door 2 is the door as the entire folding door. It is the bottom side. The door end side end portion 13 of the large door 1 and the door end side end portion 22 of the small door 2 are connected to each other via a hinge 4A so as to be rotatable. The door butt side end 23 of the small door 2 is rotatably attached to a vertical frame 33 of the door frame via a hinge 4.

On the indoor side, an electric opening / closing device 5 is provided above the opening, and the electric opening / closing device 5 and the connecting portion 6 provided at the upper end portion of the door 1 on the large door 1 are connected via a drive arm 7. ing. The large door 1 is suspended by a suspension roller 8 at an intermediate portion in the width direction, and the suspension roller 8 moves along the guide rail 9. Specifically, a roller mounting portion 80 is provided in the middle portion in the width direction of the large door 1 so as to be located at the upper end of the indoor side surface portion of the large door 1, and the roller mounting portion 80 includes the suspension roller 8. A roller shaft 81 is mounted, and the roller shaft 81 is rotatable with respect to the suspension roller 8. A guide rail 9 is extended in the opening width direction on the upper frame 30 of the door frame, and a suspension roller 8 provided on the large door 1 is extended in the opening width direction on the upper frame 30 of the opening 3. By rolling in the rail 9, the large door 1 is slidably suspended with respect to the guide rail 9, and the large door 1 is rotatable about a roller shaft 81. The large door 1 is divided into a door end side half portion and a door bottom side half portion with the roller shaft 81 (roller mounting portion 80) interposed therebetween.

As shown in FIG. 3, the guide rail 9 is attached to the indoor side surface portion 300 of the upper frame 3 in a take-out shape, and extends in the opening width direction in parallel with the upper frame 3. Therefore, as seen in general folding doors, the guide rail is located just above the door when the folding door is closed, and the movement path of the roller shaft that holds the door does not coincide with the door core. The moving path of the roller shaft 81 around which the large door 1 is suspended is offset from the core of the large door 1 of the large door 1. This is because the upper frame 3 is provided with an electric strike constituting an electric lock of the folding door. It is conceivable to provide an electric latch on the door body side and form a strike on the frame side. However, if an electric latch is provided on the movable door body side, wiring becomes complicated. It is advantageous to provide an electrical strike on the side. An electric lock is provided on the lower surface 301 of the upper frame 30, located on the door bottom side of the large door 1. The electric lock is composed of an electric strike S provided on the upper frame side of the opening and a latch L provided at the upper end of the large door 1, and the engagement of the latch L protruding into the electric strike S with respect to the strike when energized. The stop is maintained. When the energization is cut off, the latch is unlocked by the electric strike S, and the folding door can be moved even when the latch L is protruded. It is configured to enable emergency opening. The above-described “configuration in which the moving path of the roller shaft 81 on which the large door 1 is suspended and the core of the large door 1 is biased” is not an essential configuration for the airtight structure according to the present invention. A guide rail may be provided directly above the large door 1.

The opening / closing operation | movement of the folding door comprised in this way is demonstrated based on FIG. 9, FIG. FIG. 9 shows a closed state and an open state of the folding door. In the closed state of the folding door, the large door 1 and the small door 2 are in a posture extending linearly in the opening width direction. In the closed state of the folding door, the door end side end 12 and the door end side vertical frame 32 of the large door 1, the door bottom side vertical portion 13 of the large door 1 and the door end side vertical portion 22 of the small door 2, the small door 2. Door toe side vertical portion 23 and door bottom side vertical frame 33, upper end of upper door 1 and small door 2 and upper frame 30, lower end of large door 1 and small door 2 and lower frame 31 are close to each other. The gap between these members is closed by an airtight member described later. In the open state of the folding door, the large door 1 and the small door 2 are positioned on the door bottom side of the door frame, and are in a posture of being folded in parallel to each other perpendicular to the width direction of the opening. In the open posture, the door end side half of the large door 1 protrudes to the outdoor side, and the door bottom side half of the large door 1 protrudes to the indoor side.

As shown in FIG. 10, when the folding door is opened from the closed state, when the arm 7 is rotationally driven by the electric opening / closing device 5, the arm 7 moves the door bottom side of the large door 1 to the indoor side via the connecting portion 6. The large door 1 is moved to the door bottom side by the rolling roller 8 rolling in the guide rail 9, while the door bottom side half is moved to the indoor side via the roller shaft 81, and the door side half The part turns to the outdoor side, and in conjunction with the turning of the large door 1, the small door 2 also turns to the indoor side via a fixed turning fulcrum constituted by a hinge 4 at the door end side. The connecting portion of the large door 1 and the small door 2 is bent toward the indoor side, and the large door 1 is connected to the small door side (door) so as to narrow the bending angle between the large door 1 and the small door 2 via the arm 7. By moving to the bottom side, the large door 1 and the small door 2 are folded while rotating to a posture orthogonal to the opening width direction, and become an open posture. To open the mouth. When the folding door is closed, the large door 1 and the small door 2 follow the reverse movement, and become the closing posture of the folding door. The large door 1 is rotated through a roller shaft 81 constituting a pivot point that is movable in the width direction, and the small door 2 is interlocked with the rotation of the large door 2 so as to be hinged 4 (fixed on the door bottom side). It rotates via a rotation fulcrum). When the folding door is opened from the closed state, the large door 1 rotates while its pivot fulcrum moves toward the door bottom, and when the folding door is closed from the opened state, the large door 1 has the pivot fulcrum as the door. It rotates while moving to escape to the front side. Therefore, the large door 1 has a larger tilt change of the door body than the small door 2 in the opening width direction.

The folding door composed of the large door 1 and the small door 2 has an airtight structure for airtightness of the upper end portion of the opening when the folding door is closed. The airtight structure at the upper end has three airtight members, a first airtight member 16, a second airtight member 17, and a third airtight member 18, each extending in the opening width direction. When the folding door is closed, the first hermetic member 16, the second hermetic member 17, and the third hermetic member 18 are located on the same side of the opening (interior side or outdoor side), and are connected in a straight line. The first airtight member 16 seals the door end side of the large door 1 (the door end side half of the large door) from the suspension roller shaft 81 that suspends the large door 1. The second airtight member 17 seals the door bottom side of the large door 1 (the door bottom side half of the large door) from the suspension roller shaft 81 that suspends the large door 1. The third hermetic member 18 seals the entire width of the small door 2 in the width direction.

The 1st airtight member 16 is demonstrated based on FIG. 3, FIG. The 1st airtight member 16 is provided in the door tip side site | part of the upper frame 30 of a door frame so that it may correspond to the door tip side half part of the large door 1. As shown in FIG. The first airtight member 16 includes a frame member 160 and an airtight rubber 161 attached to the frame member 160. When the folding door is closed, the airtight rubber 161 is attached to the indoor side surface portion 14 of the large door 1. It is attached to the indoor side surface portion 300 of the upper frame 30 through the frame material 160 so as to contact the upper end portion. The frame member 160 is a long member that is substantially U-shaped in a sectional view. As shown in FIG. 6, the frame member 160 includes a vertical piece 162 that extends downward in a vertical direction parallel to the indoor side surface portion 300 of the upper frame 30, and a vertical piece 162. The lower horizontal piece 163 that extends integrally in the horizontal direction from the lower end portion and the upper horizontal piece 164 that extends integrally in the horizontal piece direction from the upper end portion of the vertical piece 162 are provided. The lower part of the vertical piece 162 faces the upper end part of the indoor side surface part 14 of the large door 1. A spacer 165 for attaching the airtight rubber 161 is provided above the vertical piece 162, and the lower surface of the spacer 165 is substantially flush with the lower surface portion 301 of the upper frame 30 in the horizontal direction. An airtight rubber 161 is attached to a space formed by the vertical piece 162, the lower horizontal piece 163, and the lower surface of the spacer 165. The head of the airtight rubber 161 protrudes from the lower horizontal piece 163, and when the folding door is closed, the lower half of the head of the airtight rubber 161 abuts on the upper end portion of the indoor side surface portion 14 of the large door 1, The upper half part of the airtight rubber 161 is configured to close a gap formed between the lower surface part 301 of the upper frame 30 and the upper surface 10 of the door end side half part of the large door 1. In the illustrated embodiment, the door end side end of the first hermetic member 16 extends to the vertical frame 32, and the door bottom end is slightly more than the axis of the suspension roller shaft 81. Located near the door.

The 2nd airtight member 17 is demonstrated based on FIG. The second airtight member 17 is provided in the door bottom side half of the upper end portion 10 of the large door 1. The second airtight member 17 includes a frame member 170 and an airtight rubber 171 attached to the frame member 170. When the folding door is closed, the airtight rubber 171 contacts the indoor side surface portion 300 of the upper frame 3. It is attached to the upper end 10 of the large door 1 through the frame material 170 so as to come into contact. The frame member 170 has a horizontal piece 172 that constitutes an attachment piece to the door bottom side half of the upper end surface 10 of the large door 1, and the horizontal piece 172 projects more indoors than the indoor side surface portion 14 of the large door 1. To extend. The frame member 170 further includes a vertical piece 173 that integrally extends upward from the extending end of the horizontal piece 172, and a horizontal piece that faces the horizontal piece 172 from the upper end of the vertical piece 173 toward the outdoor side. And a second horizontal piece 174 to be taken out. The vertical piece 173 has a dimension such that the upper portion of the vertical piece 173 faces the lower end portion of the indoor side surface portion 300 of the upper frame 30. An airtight rubber 171 is attached to a space formed by the horizontal piece 172, the vertical piece 173, and the second horizontal piece 174. The head of the airtight rubber 171 protrudes from the second horizontal piece 174, and when the folding door is closed, the upper half of the head of the airtight rubber 171 contacts the lower end portion of the indoor side surface portion 300 of the upper frame 3, The lower half portion of the airtight rubber 171 closes a gap formed between the lower surface portion 301 of the upper frame 30 and the upper surface 10 of the large door 1. In the illustrated embodiment, the door end side end of the second hermetic member 17 is located slightly closer to the door end side than the axis of the suspension roller shaft 81, and the door bottom side end is The large door 1 and the small door 2 are located on the door bottom side with respect to the rotation center of the rotation connecting portion.

The 3rd airtight member 18 is demonstrated based on FIG. 5, FIG. The third hermetic member 18 is provided over the entire length of the upper end portion 20 of the small door 2. The third airtight member 18 includes a frame member 180 and an airtight rubber 181 attached to the frame member 180. When the folding door is closed, the airtight rubber 181 contacts the indoor side surface portion 300 of the upper frame 30. It is attached to the upper end part 20 of the small door 2 through the frame material 180 so that it may contact | connect. The frame member 180 is a long member having a substantially U-shaped cross-sectional view. The frame member 180 is integrated in the horizontal direction with a vertical piece 182 extending vertically upward in parallel with a space with respect to the indoor side surface portion 24 of the small door 2 and an upper end portion of the vertical piece 182. And a lower horizontal piece 184 that extends integrally from the lower end of the vertical piece 182 in the horizontal direction. The upper part of the vertical piece 182 faces the lower end part of the indoor side surface part 300 of the upper frame 3. A spacer 185 for positioning when the airtight rubber 181 is attached is provided in a lower part of the vertical piece 182, and the upper surface of the spacer 185 is substantially flush with the upper end portion 20 of the small door 2 (positioned slightly above). It is). An airtight rubber 181 is attached to a space formed by the upper surface of the vertical piece 182, the upper horizontal piece 183, and the spacer 185. The head of the airtight rubber 181 protrudes from the upper horizontal piece 183, and when the folding door is closed, the upper half of the head of the airtight rubber 181 contacts the lower end portion of the indoor side surface 300 of the upper frame 30. The lower half portion of the rubber 181 closes a gap formed between the lower surface portion 301 of the upper frame 30 and the upper end portion 20 of the small door 2. In the embodiment shown in the drawing, the door end side end of the third airtight member 18 is located closer to the door end than the rotation center of the rotation connecting portion of the large door 1 and the small door 2, The side end reaches the vertical frame 33.

As is clear from FIG. 8, when the folding door is closed, the end portions of the first airtight member 16 and the second airtight member 17, and the end portions of the second airtight member 17 and the third airtight member 18 are , Each overlaps each other. The door butt side edge 160A of the frame member 160 of the first airtight member 16 is located on the door butt side of the door tip side edge 170A of the second airtight member 17. The door butt side edge 170B of the frame member 170 of the second hermetic member 17 is located closer to the door butt side than the door tip side edge 180A of the third hermetic member 18.

In the illustrated embodiment, when the folding door is closed, the door end side end portion and the door bottom side end portion of the second airtight member 17 are respectively the door bottom side end portion of the first airtight member 16 and the door of the third airtight member. It can be received at the front end. FIG. 11 is a view of the frame members 160, 170, and 180 as viewed from the front. As shown in the upper drawing of FIG. 11, the door butt side end 165A of the spacer 165 of the frame member 160 is located inside the door butt side end 160A of the frame member 160, and the first airtight member shown in FIG. The door butt side edge 161A of the 16 airtight rubbers 161 and the door butt side end 165A of the spacer 165 coincide with each other. On the door bottom side of the frame member 160, a hollow portion 166 that receives the door end side end portion of the frame member 17 is formed. As shown in the lower figure of FIG. 11, the door end side end portion 185A of the spacer 185 of the frame member 180 is located inside the door end side end portion 180A of the frame member 180, and the third airtight member 18 shown in FIG. The door end side edge 181A of the airtight rubber 181 and the door end side end portion 185A of the spacer 185 coincide with each other. On the door end side of the frame member 180, a hollow portion 186 that receives the door bottom side end portion of the frame member 17 is formed. The external dimensions of the second hermetic member 17 (frame member 170) are larger than the dimensions of the hollow portion 166 of the frame member 160 of the first hermetic member 16 and the hollow portion 186 of the frame member 180 of the third hermetic member 18. The ends of the second airtight member 17 in the length direction are received in the hollow portion 166 of the frame member 160 of the first hermetic member 16 and the hollow portion 186 of the frame member 180 of the third hermetic member 18, respectively. Configured to possible dimensions.

At the door end side end of the first airtight member 16 and the door end side end of the third airtight member 18, the airtight rubbers 161 and 181 do not reach the ends of the frame members 160 and 180, respectively. As shown in FIG. 8, the door edge side edge 161 </ b> A of the airtight rubber 161 of the first airtight member 16 is located inside the frame material with respect to the door edge side edge 160 </ b> A of the frame material 160. Is substantially coincident with the position of the door end side edge 170A of the frame 170 of the second airtight member 17 received at the end of the door bottom. The door-end side edge 181A of the air-tight rubber 181 of the third air-tight member 18 is located on the inner side of the frame material with respect to the door-end side edge 180A of the frame material 180, and at the door-end side end of the frame material 180 The position of the door bottom side edge 170B of the frame 170 of the second hermetic member 17 that is accepted substantially coincides. Thus, the door bottom side end of the frame member 160 of the first airtight member 16 is the door end side end of the second airtight member 17, and the door end side end of the frame member 180 of the third airtight member 18 is the first. The door-end side end of the two airtight members 17 is configured to be receivable. Therefore, the adjacent end portions of the first airtight member and the second airtight member and the adjacent end portions of the second airtight member and the third airtight member overlap each other when the folding door is closed. Each of the end portions is configured not to buffer when the folding door is opened and closed. In the illustrated embodiment, when the folding door is closed, the door end side end and the door bottom side end of the second airtight member 17 are respectively the door bottom side end of the first airtight member 16 and the third airtight member. In contrast to this, the size of the frame member of the second hermetic member is set larger than that of the first hermetic member and the third hermetic member. You may comprise so that the edge part of 2 airtight members may receive the edge part of a 1st airtight member, and the edge part of a 3rd airtight member, respectively.

In FIG. 8, an alternate long and short dash line A indicates an imaginary line passing through the rotation fulcrum of the large door 1. Both the door bottom side edge 160A of the frame member 160 of the first airtight member 16 and the door end side edge 170A of the second airtight member 17 are located closer to the door end than the rotation fulcrum of the large door 1. . Furthermore, the rotation fulcrum of the large door 1 is in a position biased to the indoor side of the door body. When the folding door is opened, from the closed state shown in FIG. 8, the door 1 side half of the large door 1 is rotated to the indoor side via a rotation fulcrum that moves in the door edge direction. While the door end side edge 170A of the second airtight member 17 provided on the door 1 moves from the overlapping state toward the door end side edge 160A of the first airtight member 16, the door bottom of the first airtight member 16 is moved. Exit from the side edge. When the folding door is closed, the large door body 1 is rotated via a rotation fulcrum that moves to the door end side, so that the door end side end portion of the second airtight member 17 is the first airtight member 16. Overlapping while sliding against the edge of the door. In this way, the end portions do not buffer when the folding door is opened / closed while the end portions overlap in the closed state.

Further, in FIG. 8, an alternate long and short dash line B indicates an imaginary line that passes through the rotation fulcrum of the large door 1 and the small door 2. The door edge side edge 170B of the frame member 170 of the second hermetic member 17 is located closer to the door edge side than the pivot point of the large door 1 and the small door 2, and the door end side of the third hermetic member 18 The end edge 180 </ b> A is located closer to the door end than the rotation fulcrum of the large door 1 and the small door 2. When the folding door is opened, from the closed state of FIG. 8, the door 1 side half of the large door 1 is rotated to the indoor side via a rotation fulcrum that moves in the door bottom direction. The door end side end portion of the second airtight member 17 provided in 1 and the door end side end portion of the third airtight member 18 provided in the small door 2 are expanded so as to be separated from each other. . Since the rotation fulcrum of the large door 1 moves to the door butt side, the door butt side end of the large door 1 rotates so as to escape from the door tip of the small door 2. When the folding door is closed, the large door body 1 is rotated through the rotation fulcrum that moves to the door end side, and the small door 2 is rotated through the hinge 4, whereby the second airtight member 17. The door butt side end and the door end side end of the third airtight member 18 are rotated so as to be close to each other, and both overlap. Since the rotation fulcrum of the large door 1 moves to the door tip side, the door bottom side end portion of the large door 1 rotates while leading the door front end portion of the small door 2. In this way, the end portions do not buffer when the folding door is opened / closed while the end portions overlap in the closed state.

The airtight structure of the lower end portion of the folding door will be described. A rod 19 extending in the width direction is incorporated in the lower part of the large door 1 and the small door 2, and the facing surface between the door bottom side surface 13 of the large door 1 and the door side surface portion 22 of the small door 2. The tip portion of the rod 19 is provided so as to be able to protrude and retract, and is always in a projecting posture by a spring (not shown) when the opening is opened, and when the folding door is closed, When the surface of the small door 2 facing the door side surface portion 22 is in close contact, the rod 19 is pushed in and is inserted, and the airtight member 190 is connected to the large rod 1 and small door via a leaf spring (not shown) connected to the inserted rod. 2 protrudes downward from the lower end surfaces 11, 21 and is pressed against the lower frame 31.

An airtight structure between the door side surface portion 12 of the large door 1 and the door side vertical frame 32 will be described. The door end side vertical frame 32 includes a prospective surface 320 facing the door side surface portion 12 of the large door 1, an L-shaped piece integrally formed on the indoor side end portion of the prospective surface 320, and an outdoor end of the prospective surface 320. And a step portion formed on the portion. The L-shaped piece is composed of a prospective surface 321a and a finding surface 321b. The step portion is formed by an L-shaped portion in cross-sectional view, which includes a prospective surface 322a and a finding surface 322b. A protruding piece 150 is formed at the outdoor side end of the door side surface portion 12 of the large door 1 so that the outdoor side surface portion 15 extends from the side end portion 12. When the folding door is closed, the protruding piece 150 and the inside of the stepped portion are formed. The door frame side 32 of the door frame and the door end side of the folding door (the door side surface part 12 of the large door 1) are overlapped with each other by overlapping with the finding surface 322b forming the stepped portion. Forms a jagged structure. An airtight rubber 323 is provided in the interior portion of the door-end side vertical frame 32, a recess formed by the L-shaped piece of the prospective surface 321a and the finding surface 321b, and the airtight rubber 323 is provided when the folding door is closed. The large door 1 is pressed against the end of the indoor side surface portion 14 to close the gap between the door side surface portion 12 of the large door 1 and the door side vertical frame 32.

The airtight structure of the door butt side part 23 and the door butt side vertical frame 33 of the small door 2 is demonstrated. The door butt side vertical frame 33 has a prospective surface 330 facing the door butt side surface portion 23 of the small door 2 and a concave portion formed at the outdoor end of the prospective surface 330. The recess is formed by a prospective surface 331 a, an indoor-side finding surface 331 b, and an outdoor-side finding piece 332 of the vertical frame 33. The outdoor side finding surface 332 of the vertical frame 33 that forms the concave portion forms an extended piece opposing the end of the outdoor side surface portion 25 of the small door 2 in an overlapping manner, and the door bottom side vertical frame 33 of the door frame and The door bottom side of the folding door (the door bottom side surface portion 23 of the small door 2) forms an agitation structure. An airtight rubber 333 is provided in a recess formed by the prospective surface 331 a, the indoor side finding surface 331 b, and the outdoor side finding piece 332 of the vertical frame 33, and the head of the airtight rubber 333 is from the prospective surface 330. Is also prominent. At the time of closing the folding door, the airtight rubber 333 is pressed against the outdoor end of the door bottom side 23 of the small door 2 and closes the gap between the door bottom side 23 of the small door 2 and the door bottom vertical frame 33. It is like that.

An airtight structure between the door bottom side surface portion 13 of the large door 1 and the door tip side surface portion 22 of the small door 2 will be described. The door bottom side surface portion 13 of the large door 1 has a flat portion 130 and a concave portion formed on the indoor side of the flat portion 130. The concave portion is formed of a prospecting surface 131a, an outdoor-side finding surface 131b, and a protruding piece 140 that extends the indoor side surface portion 14 of the large door 1. The door side surface part 22 of the small door 2 has a flat part 220 and a step part formed on the indoor side of the flat part 220, and the step part has an L shape in a sectional view including a prospective surface 221 a and a finding surface 221 b. Formed by the parts. The protruding piece 140 that forms the recess faces the finding surface 221b of the stepped portion of the door-side side portion 22 of the small door 2 in an overlapping manner, so that the door bottom side portion 13 of the large door 1 and the small door 2 The door end side portion 22 forms an agitation structure. The large door 1 and the small door 2 are rotatably connected to each other via a hinge 4A on the outdoor portion of the flat surface portions 130 and 220, and the large door 1 moves while rotating along the guide rail 9. Then, the folding door starts to rotate so that the connecting portion of the large door 1 and the small door 2 protrudes in a square shape toward the indoor side. The plan view 130 of the door butt side portion 13 of the large door 1 and the plane portion 220 of the door side surface portion 22 of the small door 2 have the same expected dimensions, and when the folding door is closed, the plane portions 130 and 220 are in contact with each other. A space is formed in which the recesses and the stepped portions face each other and communicate with each other in close proximity. A recess formed by the prospective surface 131a, the outdoor-side finding surface 131b, and the protruding piece 140 is filled with an airtight rubber 132, and the head of the airtight rubber 132 protrudes from the flat portion 130, and the folding door At the time of closing, the head of the airtight rubber 132 extends into the stepped portion of the door side surface portion 22 of the small door 2 and presses against the finding surface 221b of the stepped portion. The gap with the door end side surface portion 2 is closed. The slope of the small door 2 extends from the corner of the indoor side formed by the indoor-side finding surface 24 of the small door 2 and the expected surface 221a of the stepped portion toward the expected surface 221b of the stepped portion. A piece 222 is formed. The size between the tip of the protruding piece 140 and the end of the surface portion 24 of the small door 2 is set to a large size so as not to pinch a finger. By providing the inclined piece 222 in the stepped portion, the dust size is reduced and the design is improved while maintaining a space where no fingers are sandwiched.

In the airtight structure of the folding door thus configured, in the closed state of the folding door, the door bottom side end of the first airtight member 16 provided on the upper frame 3 and the second airtight member 17 provided on the large door 1 The door end side end, the door bottom side end of the second airtight member provided on the large door 1 and the door end side end of the third member 18 provided on the small door 2 are overlapped to provide an airtight structure. Therefore, the airtight member does not rotate when the folding door is opened and closed, and good airtight performance can be secured, and the durability of the airtight member is also good. Since the end portions of each of the airtight members 16, 17, and 18 overlap each other, it is possible to form a ladle shape at the upper part of the folding door, and it is a single airtight member that is a divided airtight member. Has fire resistance equivalent to the member. In addition, since the dimensions of the end portions of the airtight members 16, 17, and 18 are made different so that one can receive the other, the end portions of the airtight members are not particularly complicated. You can overlap each other.

Regarding the airtight structure of the folding door, the embodiment has been described in which when the folding door is opened, the door bottom side and the small door 2 of the large door 1 are turned to the indoor side, and the door end side of the large door 1 is turned to the outdoor side. (See FIG. 10). In this case, the first airtight member 16 is provided on the indoor side of the upper frame 30, the second airtight member 17 is provided on the indoor side of the door bottom side half of the large door 1, and the third airtight member 18 is provided on the indoor side of the small door 2. However, the portions where the first airtight member 16, the second airtight member 17, and the third airtight member 18 are provided are attached to the door bottom side of the large door 1 and the side where the small door 2 is folded and rotated. is there. Therefore, when the door bottom side and the small door 2 of the large door 1 are turned to the outdoor side, and the door end side of the large door 1 is turned to the indoor side, the first airtight member 16 is The outdoor side, the second airtight member 17 is provided on the outdoor side of the door bottom side half of the large door 1, and the third airtight member 18 is provided on the outdoor side of the small door 2.

The present invention is applied to a folding door and is suitably used for an entrance door or the like.

It is an outdoor front view of a folding door. It is a room inner side front view of a folding door. It is a longitudinal cross-sectional view of the door end side half of the large door, and is a vertical cross-sectional view along the line AA in FIG. It is a longitudinal cross-sectional view of the door butt side half part of a large door, and is a longitudinal cross-sectional view along the BB line in FIG. It is a longitudinal cross-sectional view of a small door, and is a longitudinal cross-sectional view along CC line in FIG. The longitudinal cross-sectional view of the upper end part of a folding door is shown, the left figure corresponds to FIG. 3, the center figure corresponds to FIG. 4, and the right figure corresponds to FIG. In FIG. 6, the airtight rubber is omitted. It is a cross-sectional view of a folding door. It is the elements on larger scale of FIG. 7 which shows the rotation part of a folding door. It is a top view which shows the fully closed attitude | position and fully open attitude | position of a folding door. In the figure, the A side is the indoor side and the B side is the outdoor side. It is a top view which shows the rotation locus | trajectory of the large door and small door which comprise a folding door. In the figure, the A side is the indoor side and the B side is the outdoor side. The upper diagram shows the frame material of the first hermetic member, the center diagram shows the frame material of the second hermetic member, and the lower diagram shows the frame material of the third hermetic member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Large door 2 Small door 16 1st airtight member 160 Frame material 161 Airtight rubber 17 2nd airtight member 170 Frame material 171 Airtight rubber 18 3rd airtight member 180 Frame material 181 Airtight rubber

Claims (4)

An airtight structure of a folding door composed of a large door and a small door, wherein a door butt side end of the large door and a door tip side end of the small door are rotatably connected, and the door butt of the small door The side end is rotatably attached to the vertical frame of the door frame, and the large door is rotatably attached to the roller shaft of the suspension roller movable in the opening width direction at the intermediate portion in the width direction of the upper end portion. The large door is divided into a door end side half and a door bottom side half across the roller shaft,
The airtight structure is
A first airtight member that is attached to the door-end side portion of the door frame upper frame and is in close contact with the upper end portion of the door-end-side half of the large door when the folding door is closed;
A second airtight member that is attached to the upper end portion of the door bottom side half of the large door and is in close contact with the upper frame of the door frame when the folding door is closed;
A third hermetic member that is attached to substantially the entire length of the upper end portion of the small door, and closes to the upper frame of the door frame when the folding door is closed;
The folding structure of the folding door. The door bottom side end of the first airtight member, the door tip side end of the second airtight member, the door bottom side end of the second airtight member, and the third when the folding door is closed. An airtight structure of a folding door, wherein the door end side ends of the airtight member overlap each other. The door end side end portion of the first airtight member and the door end side end portion of the second airtight member are configured to overlap each other by receiving the other end portion in one end portion. When the folding door is closed, the large door is pivoted about a roller shaft that slides and moves to the door side, so that the door side end of the second air-tight member is the first air-tight member. An airtight structure of a folding door, wherein the door overlaps while sliding with respect to an end portion on the door bottom side. 4. The door bottom side end portion of the second airtight member and the door tip side end portion of the third member are overlapped by receiving the other end portion in one end portion. When the folding door is closed, the large door rotates around the roller shaft that slides and moves toward the door end. An airtight structure of a folding door characterized in that the other end overlaps one end by rotating the small door through a fulcrum.

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