JP7101533B2 - Folding door - Google Patents

Description

The present invention relates to a folding door.

Conventionally, the fittings installed in the openings of buildings are provided with a sealing member that closes the gap formed between the shoji and the frame. For example, Patent Document 1 below proposes a folding door provided with a rotating seal body capable of closing the gap between the lower end of the shoji and the lower frame. The lower frame is formed with a groove that can accommodate the rotating seal body when the folding door is opened.

Japanese Unexamined Patent Publication No. 2006-37424

However, in the lower frame in which the groove is formed like the folding door described in Patent Document 1, when rainwater infiltrates into the indoor side or dew condensation water is generated on the indoor side, water collects in the groove. There is a problem that it ends up.
Further, when the lower frame is made of metal, the cold air of the outside air is transmitted to the indoor side through the lower frame, so that there is a drawback that the heat insulating property is poor.

Therefore, the present invention has been made in view of the above circumstances, and provides a folding door capable of draining water on the indoor side and having high heat insulating properties.

In order to achieve the above object, the present invention employs the following means.
That is, the folding door according to the present invention is a folding door in which a shoji is placed in a frame installed along an opening of a building, and the shoji can be opened and closed by folding and unfolding. The lower frame of the frame includes a metal outdoor side profile arranged on the outdoor side, a metal indoor side profile arranged on the indoor side, and the outdoor side profile and the indoor side profile. The outdoor side profile has a connecting material having a lower thermal conductivity than the indoor profile, and the indoor profile has an outdoor side wall portion arranged on the outdoor side and an indoor side. It is formed from the bottom portion connecting the indoor side wall portion and the lower end portion of the outdoor side wall portion and the lower end portion of the indoor side wall portion arranged in the sash. An airtight portion that closes the gap between the lower end portion and the lower frame is provided, the connecting material is arranged outside the groove portion, and the outdoor side wall portion is a drain hole capable of draining water. Is formed, the drain hole is arranged above the connecting material, the drain hole is provided with a check valve , and at least one hollow is provided on the indoor side and the outdoor side of the connecting material, respectively. The hollow is formed and is characterized in that it is composed of one member .

In the folding door configured in this way, the airtight portion (airtight material) comes into contact with the lower end portion of the shoji, so that the gap between the lower end portion of the shoji and the lower frame is closed. A drainage hole capable of draining water is formed in the outdoor side wall portion forming the groove portion. As a result, water such as rain that has entered the indoor side and dew condensation water that has been generated on the indoor side passes through the drainage hole of the groove. Since the drainage hole is arranged above the connecting material, the water on the indoor side is drained to the outside without the connecting material hindering the water passing through the drainage hole.
Further, between the metal outdoor side profile and the metal indoor side profile, a connecting material having a lower thermal conductivity than the outdoor side profile and the indoor side profile is arranged. Therefore, since the connecting material insulates the heat transfer between the outdoor side profile and the indoor side profile, the heat insulating property can be improved.

Further, in the folding door according to the present invention, it is preferable that the indoor side wall portion is arranged on the indoor side of the contact surface at the lower end portion of the shoji that can come into contact with the airtight portion.

In the folding door configured in this way, the indoor side wall portion forming the groove portion is arranged on the indoor side of the contact surface capable of contacting the airtight portion at the lower end portion of the shoji. Therefore, the water on the indoor side of the shoji can be drained to the outdoor side by passing through the drain hole of the groove portion.

Further, in the folding door according to the present invention, the airtight portion can move between the seal position that closes the gap between the lower end portion of the shoji and the lower frame and the open position that opens the gap. It is preferable that the groove is housed in the groove at the open position.

In the folding door configured in this way, since the airtight portion is housed in the groove portion in the open position, the airtight portion provided in the lower frame does not hinder walking or the like when the shoji is open.

Further, in the folding door according to the present invention, at least a part of the connecting material may be arranged on the outdoor side of the contact surface of the shoji.

In the folding door configured in this way, at least a part of the connecting material is arranged on the outdoor side of the contact surface of the shoji, so that the heat insulating property of the indoor side portion is enhanced as compared with the airtight material.

According to the folding door according to the present invention, water on the indoor side can be drained and has high heat insulating properties.

It is a perspective view which looked at the folding door which concerns on one Embodiment of this invention from the indoor side. It is sectional drawing of the folding door which concerns on one Embodiment of this invention. It is a vertical sectional view of the folding door which concerns on one Embodiment of this invention. It is an enlarged view of the lower part of FIG.

Hereinafter, the folding door according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4.
FIG. 1 is a perspective view of a folding door according to an embodiment of the present invention as viewed from the indoor side.
As shown in FIG. 1, the folding door 100 includes a frame body 1 provided in an opening of a building and formed in a rectangular frame shape, and two shoji screens 2 provided in the frame body 1 so as to be openable and closable. It is equipped with. The folding door 100 can be opened and closed by folding and unfolding each shoji 2. In the present embodiment, two shoji screens 2 are arranged in the frame body 1, but the number of shoji screens 2 can be appropriately set.
In the following description, the direction connecting the outdoor side and the indoor side is referred to as an indoor / outdoor direction. Further, the horizontal direction connecting the left side and the right side when viewed from the direction in which the opening penetrates the wall portion of the building (direction facing the wall portion) is referred to as a left-right direction.

FIG. 2 is a cross-sectional view of the folding door 100. FIG. 3 is a vertical cross-sectional view of the folding door 100.
As shown in FIGS. 2 and 3, the frame 1 is a metal frame 1A arranged on the outdoor side and formed of a metal material such as an aluminum alloy, and a resin frame 1X arranged on the indoor side and formed of a synthetic resin material. And are connected and configured.

The frame 1 extends in the vertical direction by connecting the upper frame 11 and the lower frame 12 extending in the left-right direction, both ends in the left-right direction of the upper frame 11 and both ends in the left-right direction of the lower frame 12, respectively. It has a vertical frame 13.

As shown in FIG. 3, the metal frame 1A of the upper frame 11 has an outer metal upper frame portion 11A arranged on the outdoor side and an inner metal upper frame portion 11B arranged on the indoor side.

The outer metal upper frame portion 11A and the inner metal upper frame portion 11B are connected via a bridge material 11C formed of a material having a lower thermal conductivity than the outer metal upper frame portion 11A and the inner metal upper frame portion 11B. There is. The bridge material 11C is made of a resin material having a low thermal conductivity, rubber, or the like.

The metal frame 1A of the lower frame 12 includes an outer metal lower frame portion (outdoor side profile) 12A arranged on the outdoor side and an inner metal lower frame portion (indoor side profile) 12B arranged on the indoor side. Have.

The outer metal lower frame portion 12A and the inner metal lower frame portion 12B are via a bridge material (connecting material) 12C formed of a material having a lower thermal conductivity than the outer metal lower frame portion 12A and the inner metal lower frame portion 12B. Are connected. In other words, no member other than the bridge member 12C is arranged between the outer metal lower frame portion 12A and the inner metal lower frame portion 12B. The bridge material 12C is made of a resin material having a low thermal conductivity, rubber, or the like.

As shown in FIG. 1, each shoji 2 has a pair of door bodies 2D and a connecting stile 3 for connecting the door bodies 2D to each other.

Each house 2D has a stile 20 formed in a square shape and a glass 29 fitted in the stile 20.

As shown in FIGS. 2 and 3, the stile body 20 includes an upper stile 21 and a lower stile 22 extending in the left-right direction, both ends of the upper stile 21 in the left-right direction, and both ends of the lower stile 22 in the left-right direction. It has a vertical stile 23 which is connected to each other and extends in the vertical direction.

As shown in FIG. 3, a suspension wheel (not shown, the same applies hereinafter) is provided at the upper end of each vertical frame 23 (see FIG. 2; the same applies hereinafter) so as to project upward. The suspension wheel is engaged with the suspension rail 110 extending in the left-right direction provided on the upper frame 11, and can travel along the suspension rail 110. As described above, the folding door 100 of the present embodiment has a so-called hanging structure in which the upper end portion of the shoji 2 is supported by the upper frame 11.

A guide roller (not shown, the same applies hereinafter) is provided at the lower end of the vertical stile 23 on the side opposite to the connecting stile 3 side of the vertical stile 23 so as to project downward. The guide roller is inserted into the guide groove G3 extending in the left-right direction provided in the lower frame 12, and is guided by the guide groove G3 so as to be movable in the left-right direction.

As shown in FIG. 1, the connecting stile 3 connects one ends of a pair of door bodies 2D (ends on the adjacent door bodies 2D side) to each other. The connecting stile 3 is provided with a hinge shaft 31 (see FIG. 2; the same applies hereinafter) extending in the vertical direction. The door body 2D is rotatable around the hinge shaft 31.

A handle 32 is provided on the indoor side of the connecting stile 3. As shown in FIG. 3, a lock member 33 is provided in the hollow portion 3s (see FIG. 2; the same applies hereinafter) in the connecting frame 3. The lock member 33 is connected to the handle 32 (see FIG. 2; the same applies hereinafter) via an interlocking mechanism (not shown), and is configured to be movable in the vertical direction in conjunction with the operation of the handle 32.

A lock portion 33a and a pressing portion 33b projecting downward are provided at the lower end portion of the lock member 33. By operating the handle 32 (locking operation), the locking member 33 moves downward in the hollow portion 3s of the connecting stile 3, and the locking portion 33a is inserted into the guide groove G3 of the lower frame 12. As a result, the door body 2D is locked in the closed state. Further, by operating the handle 32 (unlocking operation), the lock member 33 moves upward in the hollow portion 3s of the connecting stile 3, and the lock portion 33a is pulled out from the guide groove G3 of the lower frame 12. As a result, the door body 2D is unlocked. At the upper end of the connecting stile 3, a rod guide 34 that can be inserted into a suspension rail 110 extending in the left-right direction provided on the upper frame 11 is provided.

Next, the configuration of the lower frame 12 and the rotary seal body 40 provided on the lower frame 12 will be described in detail.
FIG. 4 is an enlarged view of the lower part of FIG.
As shown in FIG. 4, the outer metal lower frame portion 12A of the lower frame 12 includes a middle plate portion 121, a lower plate portion 122, a lower outer plate portion 123, an inner plate portion 124, and an outer groove constituent plate portion 127. And an upper outer plate portion 128 and an upper plate portion 129.

The middle plate portion 121 is formed in a plate shape. The middle plate portion 121 is arranged with the plate thickness direction facing up and down.

A groove constituent member 160 is provided on the upper surface of the middle plate portion 121. The groove constituent member 160 has a fixed plate portion 161 and an inner groove constituent plate portion 162. The groove constituent member 160 is provided over substantially the entire length of the lower frame 12 in the extending direction (left-right direction).

The fixing plate portion 161 is formed in a plate shape. The fixed plate portion 161 is arranged so that the plate thickness direction is directed to the vertical direction. The fixing plate portion 161 is screwed to the middle plate portion 121.

The inner groove constituent plate portion 162 is erected from the fixed plate portion 161. The inner groove constituent plate portion 162 is formed in a plate shape. The inner groove constituent plate portion 162 is arranged so that the plate thickness direction faces the indoor / outdoor direction.

A drainage hole 162h penetrating indoors and outdoors is formed in the lower part of the inner groove constituent plate portion 162. In the present embodiment, the drain holes 162h are formed in the vicinity of both ends of the lower frame 12 in the left-right direction.

The lower plate portion 122 is formed in a plate shape. The lower plate portion 122 is arranged below the middle plate portion 121. The lower plate portion 122 is inclined so that the outdoor side is arranged below the indoor side.

The lower outer plate portion 123 connects the outdoor end portion of the middle plate portion 121 and the outdoor end portion of the lower plate portion 122. The lower outer plate portion 123 is formed in a plate shape. The lower outer plate portion 123 is arranged so that the plate thickness direction faces the indoor / outdoor direction.

The inner plate portion 124 connects the indoor end portion of the middle plate portion 121 and the indoor end portion of the lower plate portion 122. The inner plate portion 124 is formed in a plate shape. The indoor end of the middle plate 121 is arranged on the outdoor side of the indoor end of the lower plate 122. Therefore, the inner plate portion 124 is arranged so as to be inclined toward the outdoor side gradually toward the upward side.

The inner plate portion 124 is formed with a pair of protrusions 124a and 124b protruding toward the indoor side. The protrusions 124a and 124b are arranged apart from each other in the vertical direction.

The outer groove forming plate portion 127 is erected from the middle to the upper side of the middle plate portion 121 in the indoor / outdoor direction. The outer groove constituent plate portion 127 is arranged on the outdoor side of the inner groove constituent plate portion 162. The outer groove forming plate portion 127 is formed in a plate shape. The outer groove constituent plate portion 127 is arranged with the plate thickness direction facing the indoor / outdoor direction.

A drainage hole 127h penetrating indoors and outdoors is formed in the lower portion of the outer groove forming plate portion 127. In the present embodiment, the drain holes 127h are formed in the vicinity of both ends of the lower frame 12 in the left-right direction.

The upper outer plate portion 128 is erected upward from the outdoor side portion of the middle plate portion 121. The upper outer plate portion 128 is formed in a plate shape. The upper outer plate portion 128 is arranged so that the plate thickness direction faces the indoor / outdoor direction.

A drainage hole 128h penetrating indoors and outdoors is formed in the lower portion of the upper outer plate portion 128. In the present embodiment, the drain holes 128h are formed in the vicinity of both ends of the lower frame 12 in the left-right direction. The drainage hole 128h is provided with a drainage cover 138 capable of draining water from the indoor side to the outdoor side.

The upper plate portion 129 connects the upper end portion of the outer groove forming plate portion 127 and the upper end portion of the upper outer plate portion 128. The upper plate portion 129 is formed in a plate shape. The upper plate portion 129 is arranged with the plate thickness direction facing up and down. The outdoor side portion of the upper plate portion 129 is slightly inclined downward toward the outdoor side.

The lower hollow S1 extending in the left-right direction is formed by the middle plate portion 121, the lower outer plate portion 123, the lower plate portion 122, and the inner plate portion 124. The upper hollow S2 extending in the left-right direction is formed by the upper plate portion 129, the upper outer plate portion 128, the middle plate portion 121, and the outer groove constituent plate portion 127. The lower hollow S1 and the upper hollow S2 are formed over substantially the entire length of the lower frame 12 in the extending direction (left-right direction).

The inner metal lower frame portion 12B of the lower frame 12 has a tubular portion 140 formed in a cylindrical shape. Inside the tubular portion 140, an indoor side hollow S3 extending in the left-right direction is formed. The indoor side hollow S3 is formed over substantially the entire length of the lower frame 12 in the extending direction (left-right direction).

The tubular portion 140 includes a bottom plate portion 141, a seal support plate portion 142, an upright wall portion 143, a bent wall portion 144, a pair of locking wall portions 145, 146, an inclined plate portion 147, and a lower portion. It has a wall portion 148 and.

The bottom plate portion 141 is formed in a plate shape. The bottom plate portion 141 is arranged with the plate thickness direction facing up and down.

The seal support plate portion 142 is erected upward from the outdoor end of the bottom plate portion 141. The seal support plate portion 142 is formed in a plate shape. The seal support plate portion 142 is arranged so that the plate thickness direction faces the indoor / outdoor direction.

At the upper end of the seal support plate portion 142, a rotation shaft portion 142a having a substantially circular cross section along the indoor / outdoor direction and the vertical direction is provided. The rotation shaft portion 142a extends in the left-right direction.

A drain hole 142h penetrating indoors and outdoors is formed in the lower portion of the seal support plate portion 142. In the present embodiment, the drain holes 142h are formed in the vicinity of both ends of the lower frame 12 in the left-right direction. A check valve 132 is provided in the drain hole 142h to prevent backflow of water (infiltration into the indoor side).

The erection wall portion 143 is erected upward from the indoor end of the bottom plate portion 141. The bent wall portion 144 extends from the upper end portion of the standing wall portion 143 toward the indoor side.

The pair of locking wall portions 145 and 146 are erected above the bent wall portion 144 and are arranged apart from each other in the indoor and outdoor directions. The resin frame 1X of the lower frame 12 is locked to the locking wall portions 145 and 146. The locking wall portion 145 is arranged on the outdoor side of the locking wall portion 146.

The inclined plate portion 147 is provided so as to extend diagonally downward from the indoor end portion of the bottom plate portion 141. The inclined plate portion 147 is arranged so as to be inclined toward the indoor side gradually toward the downward side.

The lower wall portion 148 connects the lower end portion of the inclined plate portion 147 and the indoor end portion of the bent wall portion 144.

The inclined plate portion 147 is formed with a pair of protrusions 147a and 147b protruding toward the outdoor side. The protrusions 147a and 147b are arranged apart from each other in the vertical direction.

The bridge member 12C of the lower frame 12 is sandwiched between the inner plate portion 124 of the outer metal lower frame portion 12A and the inclined plate portion 147 of the inner metal lower frame portion 12B. The bridge member 12C is locked to a pair of protrusions 124a and 124b of the outer metal lower frame portion 12A and a pair of protrusions 147a and 147b of the inner metal lower frame portion 12B.

The bridge member 12C is arranged along the surface facing the outdoor side of the inclined plate portion 147 which is arranged so as to gradually incline toward the indoor side as it goes downward, and stands upward from the upper end portion of the inclined plate portion 147. Since the drainage hole 142h is formed in the sealed seal support plate portion 142, the drainage hole 142h is arranged above the bridge material 12C.

A seal groove (groove portion) G1 capable of accommodating a rotary seal body 40 described later is formed in the lower frame 12 between the seal support plate portion 142, the upright wall portion 143, and the locking wall portion 145. Specifically, the seal groove G1 is formed by a seal support plate portion 142, a bottom plate portion 141, an upright wall portion 143, and a locking wall portion 145. The seal groove G1 has a shape that is recessed downward. The bridge material 12C is arranged outside the seal groove G1 (outside the groove).

The seal support plate portion 142 forms a wall portion (outdoor side wall portion) g11 on the outdoor side of the seal groove G1. The bottom plate portion 141 forms the bottom portion g12 of the seal groove G1. The erected wall portion 143 and the locking wall portion 145 form the indoor side wall portion (indoor side wall portion) g13 of the seal groove G1.

The lower frame 12 is formed with an insertion groove G2 in which the pressing portion 33b of the lock member 33 is arranged between the inner groove forming plate portion 162 of the groove forming member 160 and the seal support plate portion 142. Specifically, the insertion groove G2 includes an inner groove constituent plate portion 162, a fixed plate portion 161 of the groove constituent member 160, a protrusion 124a of the inner plate portion 124, an upper surface of the bridge member 12C, a protrusion 147a of the inclined plate portion 147, and the like. It is formed by a seal support plate portion 142. The insertion groove G2 has a shape that is recessed downward.

A guide groove G3 into which the guide roller and the lock portion 33a of the lock member 33 are inserted is formed in the lower frame 12 between the outer groove constituent plate portion 127 and the inner groove constituent plate portion 162 of the groove constituent member 160. There is. Specifically, the guide groove G3 is formed of an outer groove constituent plate portion 127, a fixed plate portion 161 of the groove constituent member 160, and an inner groove constituent plate portion 162. The guide groove G3 has a shape that is recessed downward.

The rotary seal body 40 is rotatably provided on the lower frame 12. As shown in FIG. 1, in the present embodiment, a pair of rotary seal bodies 40 are arranged adjacent to each other and are provided over substantially the entire length of the lower frame 12 in the extending direction (left-right direction).

As shown in FIG. 4, the rotary seal body (airtight portion) 40 has an inner peripheral member 41, an outer peripheral member 42, and a seal member 43.

The inner peripheral member 41 has a substantially fan-shaped cross section along the indoor / outdoor direction and the vertical direction. The inner peripheral member 41 has a pair of extending portions 411 that extend from the rotating shaft portion 142a and are formed so as to gradually separate from each other as they are separated from the rotating shaft portion 142a. The portions of the extension portion 411 on the opposite side to the rotation shaft portion 142a side are connected by the inner peripheral side curved portion 412.

A bearing portion 413 is provided at an end portion of the pair of extending portions 411 opposite to the inner peripheral side curved portion 412. The bearing portion 413 is rotatably provided around the rotating shaft portion 142a.

A pressed portion 414 is provided along the outer peripheral surface of the bearing portion 413. In the open state where the shoji 2 is open, the rotary seal body 40 is arranged at the open position A1 shown by the alternate long and short dash line in FIG. 4, and the bearing portion 413 is arranged so as to gradually move downward toward the outdoor side. In the closed state where the shoji 2 is closed, the rotary seal body 40 is arranged at the seal position A2 shown by the solid line in FIG. 4, and the bearing portion 413 is arranged vertically downward.

The outer peripheral member 42 is provided on the outer peripheral side of the inner peripheral side curved portion 412 of the inner peripheral member 41 in the circumferential direction centered on the rotation shaft portion 142a. The outer peripheral member 42 has an outer peripheral side curved portion 421 along the outer peripheral side of the inner peripheral side curved portion 412 of the inner peripheral member 41. The outer peripheral side curved portion 421 and the inner peripheral side curved portion 412 are locked and connected to each other.

The seal member 43 is locked to the inner peripheral member 41 on the side close to the shoji 2 in the closed state of the shoji 2. At the seal position A2, the seal member 43 is in contact with the lower stile 22 of the shoji 2.

In the open state, the rotary seal body 40 is arranged so that the outer peripheral side curved portion 421 side faces downward due to the weight of the rotary seal body 40. The rotary seal body 40 is housed in the seal groove G1 of the lower frame 12 and is arranged at an open position. In the open position, the gap T between the lower end of the shoji 2 and the lower frame 12 is open.

In this state, when the handle 32 is operated (locked) and the lock member 33 moves downward, the pressing portion 33b comes into contact with the pressed portion 414 of the rotary seal body 40. When the lock member 33 moves further downward, the rotary seal body 40 rotates around the rotary shaft portion 142a of the lower frame 12 due to the pressing force acting on the pressed portion 414 from the pressing portion 33b and protrudes from the seal groove G1. And is placed at the seal position A2. At the seal position A2, the surface 43a of the seal member 43 of the rotary seal body 40 facing the outdoor side abuts on the surface (contact surface) 22a of the lower stile 22 of the shoji 2 facing the indoor side, and the lower end portion and the lower portion of the shoji 2 are in contact with each other. The gap T between the frame 12 and the frame 12 is closed.

At the seal position A2, an airtight line L is formed along the surface 43a of the seal member 43 and the surface 22a of the lower stile 22 along a substantially vertical surface.

At least a part of the seal groove G1 is arranged indoors with respect to the airtight line L. In the present embodiment, the surface of the seal groove G1 facing the indoor side of the seal support plate portion 142 is arranged so as to be substantially along the airtight line L.

The bridge material 12C is arranged on the airtight line L (vertically below the airtight line L). At least a part of the bridge material 12C is arranged on the outdoor side of the airtight line L. In the present embodiment, most of the bridge material 12C is arranged on the outdoor side of the airtight line L.

Water such as rainwater that has entered the seal groove G1 and dew condensation water that has been generated indoors passes through the drain hole 142h of the seal support plate portion 142 and proceeds into the insertion groove G2. Next, the water passes through the drainage hole 162h of the inner groove constituent plate portion 162 and proceeds into the guide groove G3, passes through the drainage hole 127h of the outer groove forming plate portion 127, and proceeds into the upper hollow S2, and proceeds to the upper outer side. The water is drained to the outside from the drain hole 128h of the plate portion 128 (see the two-dot chain line B1 shown in FIG. 4).

In the folding door 100 configured in this way, the seal member 43 of the rotary seal body 40 comes into contact with the lower end portion of the shoji 2, so that the gap T between the lower end portion of the shoji 2 and the lower frame 12 is closed. .. A drain hole 142h is formed in the wall portion g11 (seal support plate portion 142) on the outdoor side forming the seal groove G1. As a result, water such as rain that has entered the indoor side and dew condensation water generated on the indoor side passes through the drain hole 142h of the seal groove G1. Since the drainage hole 142h is arranged above the bridge material 12C, the water on the indoor side is drained to the outside without disturbing the water that has passed through the drainage hole 142h.

Further, the wall portion g13 on the indoor side forming the seal groove G1 is arranged on the indoor side of the airtight line L. A drain hole 142h is formed in the wall portion g11 (seal support plate portion 142) on the outdoor side forming the seal groove G1. Therefore, the water on the indoor side of the airtight line L can be drained to the outdoor side by passing through the drain hole 142h of the seal groove G1.

When water crosses the airtight line L and enters the indoor side and water accumulates in the seal groove G1, the rotary seal body 40 at the open position floats with the water accumulated in the seal groove G1, and the rotary seal body 40 becomes. It may not be accommodated in the seal groove G1. In the present embodiment, since water can be drained from the drain hole 142h of the wall portion g11 (seal support plate portion 142) of the seal groove G1, the rotary seal body 40 can be reliably accommodated in the seal groove G1.

Further, between the metal outer metal lower frame portion 12A and the metal inner metal lower frame portion 12B, a material having a lower thermal conductivity than the outer metal lower frame portion 12A and the inner metal lower frame portion 12B is formed. The bridge material 12C is arranged. Therefore, since the bridge material 12C insulates the heat transfer between the outer metal lower frame portion 12A and the inner metal lower frame portion 12B, the heat insulating property can be improved.

Further, since the rotary seal body 40 is housed in the seal groove G1 at the open position, the rotary seal body 40 provided on the lower frame 12 does not hinder walking or the like when the shoji 2 is open.

Further, the water accumulated in the seal groove G1 merges with the water accumulated in each of the insertion groove G2 and the guide groove G3 and is drained. Therefore, it is possible to efficiently organize the drainage routes rather than providing the drainage routes of the grooves G1, G2, and G3 separately.

Further, when the outer metal lower frame portion 12A and the inner metal lower frame portion 12B are connected by the bridge material 12C, the inner plate portion 124 of the outer metal lower frame portion 12A and the inclined plate portion 147 of the inner metal lower frame portion 12B are connected. The bridge material 12C is sandwiched between and. The bridge material 12C is pressed by a roller from an oblique vertical direction, and the protrusions 124a, 124b, 147a, and 147b are crimped to the bridge material 12C. In the present embodiment, since the groove constituent member 160 is screwed to the outer metal lower frame portion 12A, the roller is attached to the outer groove constituent plate portion 127 before the groove constituent member 160 is attached to the outer metal lower frame portion 12A. It can be inserted into the space between the seal support plate portion 142 and the seal support plate portion 142. Therefore, since a space for arranging the rollers can be secured between the outer groove forming plate portion 127 and the seal support plate portion 142, the workability when attaching the bridge material 12C is good.

It should be noted that the various shapes and combinations of the constituent members shown in the above-described embodiment are examples, and various changes can be made based on design requirements and the like within a range not deviating from the gist of the present invention.

For example, in the embodiment shown above, the airtight portion is a rotary seal body 40 rotatably provided on the lower frame 12, but the present invention is not limited to this. The airtight portion is configured to be movable in the vertical direction on the lower frame 12 and protrude upward in the closed state of the shoji 2 so as to be in contact with the shoji 2 or fixed to the lower frame 12 (immovably). May be good.

Further, in the embodiment shown above, the groove portion is a seal groove G1 that can accommodate the rotary seal body 40, but the present invention is not limited to this. A screen door (not shown) may be provided on the indoor side of the shoji 2 and the lower end of the screen door may be arranged in the groove.

1 ... Frame body 1A ... Metal frame 1X ... Resin frame 2 ... Shoji 2D ... Door body 3 ... Connecting frame 11 ... Upper frame 12 ... Lower frame 12A ... Outer metal lower frame part (outdoor side profile)
12B ... Inner metal lower frame (indoor side profile)
12C ... Bridge material (connecting material)
13 ... Vertical frame 20 ... Frame 22a ... Surface (contact surface)
32 ... Handle 33 ... Lock member 33a ... Lock part 33b ... Pressing part 40 ... Rotating seal body (airtight part)
43 ... Seal member 100 ... Folding door 142a ... Rotating shaft portion 142h ... Drain hole 414 ... Pressed portion A1 ... Open position A2 ... Seal position G1 ... Seal groove (groove portion)
G2 ... Insertion groove G3 ... Guide groove g11 ... Seal groove (groove) Outdoor wall of G1 (outdoor side wall)
g12 ... Bottom g13 ... Seal groove (groove) Indoor wall (indoor side wall) of G1
L ... Airtight line S1 ... Lower hollow S2 ... Upper hollow S3 ... Indoor hollow T ... Gap

Claims (4)

A folding door in which a shoji is placed inside a frame installed along the opening of a building, and the shoji can be opened and closed by folding and unfolding.
The lower frame of the frame body is
With the metal outdoor side profile placed on the outdoor side,
The metal indoor side profile placed on the indoor side,
The outdoor side profile and the indoor side profile are connected to each other, and the outdoor side profile and the connecting member having a lower thermal conductivity than the indoor side profile are provided.
For the indoor side profile,
An outdoor side wall portion arranged on the outdoor side, an indoor side wall portion arranged on the indoor side, a groove portion formed from the bottom portion connecting the lower end portion of the outdoor side wall portion and the lower end portion of the indoor side wall portion, and a groove portion recessed downward.
An airtight portion that comes into contact with the lower end portion of the shoji and closes the gap between the lower end portion of the shoji and the lower frame is provided.
The connecting material is arranged outside the groove and is arranged.
A drainage hole capable of draining water is formed in the outdoor side wall portion.
The drainage hole is arranged above the connecting material and is arranged above the connecting material.
A check valve is provided in the drain hole.
Hollows are formed on the indoor side and the outdoor side of the connecting material, respectively.
The hollow is a folding door characterized by being composed of one member . The folding door according to claim 1, wherein the indoor side wall portion is arranged on the indoor side of a contact surface capable of contacting the airtight portion at the lower end portion of the shoji. The airtight portion is movable between a seal position that closes the gap between the lower end portion of the shoji and the lower frame and an open position that opens the gap, and the open position is the said. The folding door according to claim 1 or 2, which is housed in a groove. The folding door according to claim 2, wherein at least a part of the connecting material is arranged on the outdoor side of the contact surface of the shoji.

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