JP6449034B2 - Resin sash - Google Patents

Description

  The present invention relates to a resin sash including a resin window frame and a resin shoji.

In recent years, resin sashes in which a frame and a shoji ridge are formed hollow with resin have become well known, but it is also essential to improve fireproof performance in resin sashes.
In the resin sash, even if the resin frame or the heel is melted in the event of a fire by arranging a reinforcing member or a thermal expansion refractory material inside the hollow of the resin frame or the heel, the frame A resin sash that prevents a flame from entering between the body and the bag is known (Patent Document 1).

Patent No. 5290034

In the above prior art documents, in order to prevent the intrusion of flame from the space between the frame and the bag, an angle member having an overlapping portion facing the indoor and outdoor directions is arranged on the resin frame and the bag. By doing so, the flame is not easily penetrated.
However, since the angle member is fixed to the inner peripheral surface of the frame body and the outer peripheral surface of the bag, even if the thermal expansion refractory material attached to the reinforcing member disposed inside the hollow body of the frame body and the bag is expanded. The thermal expansion refractory material such as expansion of the space between the frame body and the heel is prevented by the fixing portion of the angle member, and the expanded thermal refractory material leaks from between the molten frame body and the heel. However, it was difficult to sufficiently inflate, and it was difficult to sufficiently fill the expanded space between the frame and the heel with the expanded refractory material, and it was difficult to prevent the penetration of the space.

  In view of the above circumstances, the present invention provides a space between the frame and the ridge without disturbing the expansion of the thermally expanded refractory material in the event of a fire while arranging sufficient reinforcing members on the resin frame and the ridge. An object of the present invention is to prevent penetration of the space by efficiently closing the wall with a reinforcing member and a thermally expanded refractory material.

The present invention includes a resin window frame attached to a building opening, and a resin shoji that is provided on the window frame so as to be freely opened and closed. A hollow rising wall extends toward the other side of at least one of the window frame and the ridge, and the other of the window frame and the ridge has a window frame and a ridge when the shoji is closed . It overlaps in the prospective direction with respect to the rising wall extended to one side, and in the hollow part of the window frame and in the hollow part of the eaves, a metal is formed so as to surround a space formed between the window frame and the eaves. Each of the reinforcing members made of refractory material is disposed, and at least one surface of the reinforcing member facing the space formed between the window frame and the flange expands due to heat and fills the space surrounded by the reinforcing member. Is provided.
Also, the resin window frame attached to the building opening and the resin shoji that can be opened and closed on the window frame, and any one of the resin window frame and the resin cage that constitutes the shoji One has a hollow main body and a hollow rising wall extending toward the other side, and the other of the window frame and the collar extends to one of the window frame and the collar when the shoji is closed. rising wall has a hollow portion that overlaps with expected direction with respect to, and the hollow portion of the hollow portion and the rising wall of one of the main body portion of the window frame and stiles, the window frame and the other of the hollow portion of the stile The metal reinforcing member is disposed, and the main body and the rising wall of the window frame and the wall and the other hollow of the window frame and the wall of the reinforcing member disposed in the other hollow part of the window frame and the wall. the surface facing the space surrounded by the parts, filling the space surrounded by the hollow portion expands by heat Characterized in that a that the refractory material.

  By efficiently closing the space between the resin frame and the heel frame with the reinforcing member and the thermal expansion refractory material, penetration of the space can be prevented.

It is an inside view of the sliding resin sash which concerns on embodiment of this invention. It is a longitudinal cross-sectional view of the resin sash which concerns on embodiment of this invention. It is a cross-sectional view of the resin sash which concerns on embodiment of this invention. It is an expansion cross-sectional view of the left vertical frame of the resin sash which concerns on embodiment of this invention. It is an expansion cross-sectional view of the vertical gutter on the left side of the resin sash according to the embodiment of the present invention. It is an expansion cross-sectional view of the left side vertical frame and vertical gutter of the resin sash which concerns on embodiment of this invention. It is an expanded cross-sectional view of the left side vertical frame and vertical gutter of the resin sash which concerns on other embodiment of this invention.

A resin sash according to an embodiment of the present invention will be described with reference to the drawings.
(Overall configuration)
As shown in FIG. 1, the resin sash according to the embodiment of the present invention is installed in a building opening, and has a frame body 1 formed by assembling an upper frame 11, a lower frame 12, and left and right vertical frames 13, 14 around four sides. The shoji 2 is formed by assembling the upper rod 21, the lower rod 22, and the left and right vertical rods 23, 24 around four sides, and the panel body 25 such as glass is fitted on the inner circumference thereof.
Then, the shoji 2 is opened and closed with respect to the frame 1 by the arm members 3, 3 disposed between the left and right vertical frames 13 and 14 of the frame 1 and the left and right vertical rods 23 and 24 of the shoji 2. It is configured as a sliding window supported freely.
On the indoor side of the lower lid 22, an operator 93 can be gripped when the shoji 2 is opened and closed, and a handle 93 for locking the shoji 2 in the closed state is disposed.
Below, each member which comprises the resin sash of embodiment of this invention is demonstrated in detail with reference to drawings.

(Configuration of window frame)
The upper frame 11, the lower frame 12, and the left and right vertical frames 13, 14 constituting the frame 1 are made of synthetic resin, and as shown in FIGS. Is formed.
The configuration of each frame will be described using the left vertical frame with reference to FIG.

The left vertical frame 13 includes a frame main body part 131 having a hollow rectangular shape, an outdoor hollow part 132 continuous to the outdoor side of the frame main body part 131, and a hollow frame rising wall continuous to the indoor side of the frame main body part 131. 133.
A mounting piece 131a extends in the vicinity of the prospective middle of the outer peripheral surface of the left vertical frame 13 toward the outer peripheral direction, and the metal nail fin angle material 51 is sandwiched between the housing of the building opening. And fixed by fixing means n such as screws.
Moreover, the indoor side attachment piece 131b is extended from the indoor side of the outer peripheral surface of the left vertical frame 13 toward the indoor direction, and is fixed to the inner peripheral surface of the building opening by fixing means n such as screws. Yes.

  In the hollow interior of the frame body 131, a metal main reinforcing member 53 having a substantially U shape is inserted over the entire length in the longitudinal direction by the outer peripheral piece 53a, the inner peripheral piece 53b and the finding piece 53c. The outer peripheral piece 53a is fixed to the nail fin angle member 51 by a connecting means b such as a screw across the outer peripheral wall of the frame main body 131 of the left vertical frame 13, and the inner peripheral piece 53b is fixed by a connecting means b such as a screw. The frame body 131 is fixed to the inner peripheral surface portion.

The frame rising wall 133 that is continuous with the indoor side of the frame main body 131 extends in the inner circumferential direction from the frame main body 131, and the indoor side surface of the shoji 2 is applied to the outdoor side surface of the extended portion. The sealing material s which contacts is arranged, and the frame rising wall 133 is configured as a door stop.
An intermediate wall 133b is formed in the vicinity of the intermediate position in the left-right direction inside the hollow of the frame rising wall 133 (near the inner peripheral surface of the frame main body 131), and the inside of the frame rising wall 133 is connected to the outer peripheral side hollow 133a and the inner periphery. The side hollow portion 133c is divided to improve the strength of the frame rising wall 133.

A metal outer peripheral side reinforcing member 54 and inner peripheral side reinforcing member 55 are inserted over the entire length in the longitudinal direction into the divided outer peripheral side hollow portion 133a and inner peripheral side hollow portion 133c.
The outer peripheral side reinforcing member 54 and the inner peripheral side reinforcing member 55 have finding surface portions 54a and 55a and at least one prospective surface portion 54b and 55b, and the prospective surface portions 54b and 55b face each other with the intermediate wall 133b interposed therebetween. Are arranged to be.

The prospective surface portion 54b of the outer peripheral side reinforcing member 54 is provided with a hole into which the long screw b is inserted, and a refractory material (thermal expansion refractory material f) that expands due to heat is formed on the inner peripheral side surface of the prospective surface portion 54b. Has been placed. Further, the prospective surface portion 55b of the inner peripheral side reinforcing member 55 is provided with a screw hole into which the long screw b is screwed, and the long screw b inserted from the outer peripheral side surface of the frame rising wall 133 of the left vertical frame 13 is provided. Accordingly, the outer peripheral side reinforcing member 54 and the inner peripheral side reinforcing member 55 are connected with the intermediate wall 133b and the thermal expansion refractory material f interposed therebetween, and the frame rising wall 133, the outer peripheral side reinforcing member 54 and the inner peripheral side reinforcing member 55 are integrated. It is configured.
The frame rising wall 133 only needs to have a portion extending to the inner peripheral side. For example, in the above description, the outer peripheral side hollow portion 133a is a hollow portion integrated with the frame main body portion 131, and the inner peripheral side hollow portion is formed. It is also possible to configure 133c as the frame rising wall 133.

  The configuration of the left vertical frame 13 has been described above, but the upper, lower frames 11 and 12 and the right vertical frame 14 have the same structure. The main reinforcing member 53 inserted into each frame is connected to another adjacent main reinforcing member 53 at its end by a metal angle member (not shown) or the like, and by a metal member over the four circumferences of the frame body. It is reinforced.

(Composition of shoji)
The upper and lower ridges 21, 22 and the left and right vertical ridges 23 and 24 constituting the shoji 2 are made of synthetic resin, and as shown in FIGS. Yes.
The configuration of each kite will be described using the left vertical kite 23 with reference to FIG.

  The left vertical rod 23 has a hollow rectangular main body 231, a vertical wall 232 that is continuous with the outdoor side of the vertical main body 231 and extends in the outer peripheral direction, and an indoor side of the vertical main body 231. It is comprised from the indoor side wall part 233 which comprises the indoor side of the glass front, and the pushing edge member 234 which engages with the inner periphery of the upright wall 232, and comprises the outdoor side of a glass front, On the outer peripheral surface of 231, a groove-like rail portion 231 a that opens toward the outer periphery is provided.

  On the outer peripheral surface of the left vertical rod 23, a metal rod cover member 61 is disposed. The eaves cover member 61 includes a finding surface portion 61a and a prospective surface portion 61b. The finding surface portion 61a covers the indoor side surface of the rising portion of the eaves rising wall 232, and covers the outer peripheral surface of the eaves main body portion 231 with the expectation surface portion 61b. In the portion 231a, the main body 231 and a main reinforcing member 62 described later are connected by a connecting means b such as a screw.

Inside the hollow portion of the heel body 231, the ridge rising wall 232, and the indoor side wall 233 constituting the left vertical ridge 23, the metal main heel reinforcement member 62, the outdoor heel reinforcement member 63, and the indoor side cocoon reinforcement, respectively. The member 64 is inserted over the entire length.
The main rod reinforcing member 62 inserted into the hollow portion of the rod main body portion 231 has at least an outer peripheral piece 62a, an inner peripheral piece 62b, and a finding piece 62c, and the outer peripheral piece 62a is the rod main body portion 231 of the left vertical rod 23. In addition, it is connected and fixed to the prospective surface portion 61b of the eaves cover member 61 by a connecting means b such as a screw, and a thermal expansion refractory material f is disposed on the inner peripheral piece 62b.

  The eaves rising wall 232 is provided with an intermediate wall 232b near the intermediate position in the left-right direction in the hollow portion (near the position of the outer peripheral surface of the eaves main body 231), and is located outside the eaves main body 231. An inner peripheral side hollow portion 232a having an engaging portion that engages with the pressing edge member 234 on the peripheral side, and a rising portion that extends from the peripheral side of the flange main body portion 231 constitute a sealing material s on the indoor side surface. An outer peripheral side hollow portion 232c to be attached is formed.

  The outdoor heel reinforcing member 63 inserted into the heel rising wall 232 is inserted into the hollow portion of the outer peripheral heel hollow portion 232c, and as shown in FIG. 2, the outer peripheral side of the main reinforcing member 53 of the left vertical frame 13 is positioned on the outer peripheral side, and the inner peripheral end is positioned on the inner peripheral side of the outer peripheral end of the eaves cover member 61. Therefore, it arrange | positions so that the outdoor side between the main reinforcement member 53 of the left vertical frame 13 and the collar cover member 61 may be plugged up.

The main surface reinforcing member 62, the outdoor outer surface reinforcing member 63, and the main body reinforcing member 62 are connected to the detecting surface portion 61 a of the outer cover member 61 by connecting means b such as a screw. Integration with the cover member 61 is intended.
A thermal expansion refractory material f is disposed on the outdoor side of the outdoor side wall reinforcing member 63, and expands quickly against a fire on the outdoor side, and the outdoor side of the outdoor side wall reinforcing member 63 (a fire has occurred). A heat insulating layer can be formed on the side) to delay the melting of the frame and the flame and to delay the intrusion of flames and the like.
Note that the ridge rising wall 232 only needs to have a portion extending to the outer peripheral side. For example, in the above description, the inner peripheral heel hollow portion 232a is formed as a hollow portion integrated with the heel main body portion 231, and the outer peripheral ridge hollow It is also possible to configure the portion 232 c as the upright wall 232.

The indoor side wall reinforcing member 64 inserted into the hollow part of the indoor side wall part 233 includes a finding surface part 64a covering the indoor side from the glass front opening of the left vertical wall 23 to the wall main body part 231. Prospect surface portions 64b and 64c are formed on the indoor side from the inner peripheral end and the outer peripheral end, respectively.
A thermal expansion refractory material f is arranged on the outer peripheral side surface of the inner peripheral side prospective surface portion 64b and the outer peripheral side surface of the outer peripheral side prospective surface portion 64c, and the outer peripheral side prospective surface portion in the hollow portion of the indoor side wall portion 233. 64c is connected and fixed to the outer peripheral surface of the indoor side wall portion 233 by connecting means b such as a screw with a thermal expansion refractory material f interposed therebetween.

  A glass front opening is formed on the inner periphery of the left vertical shaft 23 by the indoor side wall 233 and the pushing edge member 234. The cross section of the glass front opening covers the outer peripheral surface of the panel body 25 such as glass and the inner side surface. The glass holder 65 and the glass holder 66 having an L-shaped cross section that is engaged with the glass receiver 65 and covers the outer peripheral surface and the outdoor side surface of the panel such as glass are disposed.

  The outer peripheral surface of the glass receiver 65 is connected to the inner peripheral piece 62b of the main rod reinforcing member 62 inserted into the hollow portion of the main bag portion 231 by connecting means b such as a screw, and the inner side surface of the glass receiver 65. Is connected to the finding surface portion 64a of the indoor side wall reinforcing member 64 disposed in the hollow portion of the indoor side wall portion 233 by a connecting means b such as a screw.

Accordingly, the main rod reinforcing member 62, the outdoor rod reinforcing member 63, the indoor rod reinforcing member 64, the rod cover member 61, the glass receiver 65, the glass retainer 66, etc., which are disposed in the hollow portions constituting the left vertical rod 23. The metal reinforcing member is integrally connected by the connecting means b such as a screw, and even if the resin cage is melted in the event of a fire, the metal member is decomposed and the panel body 25 falls off. Can be prevented.
Although not shown, the prospective surface portion 64c on the outer peripheral side of the indoor side reinforcement member 64 and the main reinforcement member 62 can also be connected by a metal connection member or the like, and the main reinforcement member 62 in the event of a fire. And the indoor side wall reinforcing member 64 can be prevented from separating and spreading.

  Further, a thermal expansion refractory material f is disposed between the overlapping portions of the glass receiver 65 and the glass retainer 66, and the panel body 25 is disposed on the outdoor side surface of the glass receiver 65 and the indoor side surface of the glass retainer 66. The thermal expansion refractory material f is disposed so as to oppose the glass, and in the event of a fire, the thermal expansion refractory material f expands and fills the glass front, and a flame starts from between the glass receiver 65 and the glass retainer 66 and the panel body 25 such as glass. And intrusion of smoke and so on.

  Although the configuration of the left vertical rod 23 has been described above, the upper and lower rods 21 and 22 and the right vertical rod 24 have the same structure, and the main rod reinforcing member 62 inserted into each rod has its end portion. In FIG. 2, the other main rod reinforcing member 62 is connected with a metal angle member (not shown) or the like so as to be reinforced by a metal member over the four circumferences of the shoji.

(Connection structure between frame and shoji)
Next, attachment of the shoji 2 to the frame 1 will be described.
As shown in FIGS. 1, 3 and 6, the left and right vertical rods 23 and 24 of the shoji 2 are supported by the left and right arm members 3 and 3 with respect to the left and right vertical frames 13 and 14 of the frame 1. One end of each of the arm members 3 and 3 is connected to the inner peripheral surfaces of the left and right vertical frames 13 and 14, and the other end is connected to the outer peripheral surfaces of the left and right vertical rods 23 and 24 of the shoji 2, By forming, the shoji 2 is supported with respect to the frame 1 so that it can slide out and be freely opened.

  Further, as shown in FIG. 2, a frame-side warp prevention fitting 81 is fixed to the inner peripheral surface of the upper frame 11, and a heel-side warpage prevention fitting 82 is fixed to the outer peripheral surface of the upper collar 21. In addition, the shoji 2 is prevented from being opened along the frame 1 and the shoji 2 by the heat in the event of a fire.

  On the other hand, a lock pin 91 is slidably disposed on the rail portion 231 a on the outer periphery of the lower collar 22, and a lock pin receiver 92 that is engaged with the lock pin 91 is fixed to the inner peripheral surface of the lower frame 12. The lock pin 91 can be locked to the lock pin receiver 92 and the closed state of the shoji 2 can be locked by the lock operation of the handle 93 disposed on the indoor surface of the lower rod 22.

(Fireproof structure between frame and shoji)
In the embodiment of the present invention, the fireproof structure employed in the space between the frame 1 and the shoji 2 will be described in more detail with reference to FIGS.
The space between the left and right vertical frames 13 and 14 and the left and right vertical rods 23 and 24 is a main reinforcing member 53 inserted into the hollow portion of the frame main body 131 constituting the left and right vertical frames 13 and 14. , The inner periphery side reinforcing member 55 disposed in the hollow portion of the frame rising walls 133, 143, and the main rod reinforcement disposed in the hollow portion of the rod main body portions 231, 241 constituting the left and right vertical rods 23, 24. The member 62, the outdoor side heel reinforcement member 63 disposed in the hollow portion of the ridge rising walls 232, 242 and the indoor side heel reinforcement member 64 disposed in the hollow portion of the indoor side wall portions 233, 243 are made of metal over four circumferences. It is surrounded by the reinforcing member.

  And the thermal expansion refractory material f is attached to the site | part which opposes the back surface of the outer peripheral surface of the collar of the indoor side reinforcement member 64, and when the indoor side wall parts 233 and 243 are melted in the event of a fire, Since the expanded refractory material f expands and quickly fills the space surrounded by the metal reinforcing members, indoor and outdoor communication in the space can be prevented quickly.

And since the thermal expansion refractory material f is arrange | positioned in the indoor side position (outer peripheral side surface of the indoor side heel reinforcement member 64) of the heel outer peripheral surface, in the initial stage of expansion of the thermal expansion refractory material f, the left and right vertical frames 13, 14 and the left and right vertical rods 23, 24, in the hollow portions of the frame main body portions 131, 141 and the frame rising walls 133, 143, and the indoor wall portions 233, 243 of the rods Since expansion expands toward a relatively narrow space A on the indoor side surrounded by the arranged reinforcing members, indoor and outdoor communication can be prevented by the thermally expanded refractory material at an early stage of the expansion process of the refractory material f.
Thereafter, the entire space between the left and right vertical frames 13 and 14 and the left and right vertical rods 23 and 24 can be expanded to further delay the intrusion of a flame or the like.

  Similarly to the space between the left and right vertical frames 13 and 14 and the left and right vertical rods 23 and 24, the space between the upper frame 11 and the upper rod 21 is surrounded by each reinforcing member in the event of a fire. Since the thermally expanded refractory material f expands so as to fill the remaining space, it is possible to prevent indoor and outdoor communication in the space portion.

  The space between the lower frame 12 and the lower rod 22 is an inner space disposed in the hollow portion of the main reinforcing member 53 and the frame rising wall 123 that are inserted into the hollow portion of the frame main body 121 constituting the lower frame 12. Surrounded by the peripheral side reinforcing member 55, the main rod reinforcing member 62 disposed in the hollow portion of the rod main body portion 221 constituting the lower rod 22, and the indoor side rod reinforcing member 64 disposed in the hollow portion of the indoor side wall portion 223. Since the thermal expansion refractory material f is attached to the portion of the indoor side heel reinforcement member 64 that faces the rear surface of the outer peripheral surface of the heel, when the indoor side wall 223 is melted in the event of a fire, The material f expands so as to fill the space A on the indoor side surrounded by the reinforcing members made of each metal, and between the lower frame 12 and the lower rod 22 at the initial stage of expansion of the thermal expansion refractory material f. It is possible to prevent indoor and outdoor communication in the space.

  As described above, in the resin sash according to the embodiment of the present invention, a metal reinforcing member is disposed at an appropriate position with respect to a frame formed by a plurality of hollow portions and a hollow portion of the collar, and the frame and A space surrounded by a metal reinforcing member is formed between the inner wall and the inner wall of the inner wall of the bag, and is opposed to the rear surface of the outer peripheral surface of the inner wall of the inner wall reinforcing member 64. A thermal expansion refractory material f is disposed at the site.

Therefore, at normal times, the thermally expanded refractory material f is not exposed to the outside, and is prevented from being deteriorated by ultraviolet rays or damage due to external force. The space surrounded by the metal reinforcing member is maintained, and the expanded thermal expansion refractory material f is filled in the space, thereby preventing penetration between the frame and the shoji.
At this time, the thermal expansion refractory material f is disposed on the indoor side, and at the initial stage of expansion, is surrounded by at least the frame main body portion and the frame rising wall, and the reinforcing member disposed in the hollow portion of the indoor side wall portion of the bag. By expanding toward the indoor space A, penetration between the frame and the shoji can be quickly prevented at a relatively early stage in the expansion process of the thermally expanded refractory material f.

  Moreover, the connection part which connects the shoji 2, such as the arm member 3, and the frame 1 can be protected from a flame, heat, etc., and from the window frame of the shoji 2 by melt | dissolution of the connection part, such as the arm member 3, etc. at the time of a fire Can be prevented from falling off.

In addition, although the above-mentioned embodiment is a sliding window, this invention is not restricted to a sliding window in particular, It can employ | adopt with respect to the resin sash for various windows opened and closed.
Further, in this embodiment, the thermal expansion refractory material f is attached to a portion of the indoor side heel reinforcing member 64 that faces the back surface of the outer peripheral surface of the heel, but the attachment location is limited to a location on the indoor side of the heel. For example, as shown in FIG. 7, a thermal expansion refractory material f is applied to the outer peripheral inner peripheral surface of the inner peripheral piece 53 b of the main reinforcing member 53 disposed in the frame main body 131 of the left vertical frame 13. For example, it can be provided on the frame body side or on the outdoor side.

DESCRIPTION OF SYMBOLS 1: Frame body 11: Upper frame 12: Lower frame 13: Left vertical frame 131: Frame main-body part 131a: Attachment piece part 131b: Indoor side attachment piece part 132: Outdoor outdoor hollow part 133: Frame rising wall 133a: Outer peripheral side hollow Part 133b: Intermediate wall 133c: Inner peripheral side hollow part 14: Right vertical frame 2: Shoji 21: Upper eaves 22: Lower eaves 23: Left eaves 231: Eaves main body 231a: Rail part 232: Elevated wall 232a: Chamber Inner side hollow part 232b: Intermediate wall 232c: Outer peripheral side side hollow part 233: Indoor side wall part 234: Pushing edge member 24: Right vertical hook 25: Panel body 3: Arm member 51: Nail fin angle material 53: Main reinforcing member 53a: Outer peripheral piece 53b: Inner peripheral piece 53c: Finding piece 54: Outer peripheral side reinforcing member 55: Inner peripheral side reinforcing member 61: Reed cover member 62: Main reed reinforcing member 63: Outdoor reed reinforcing member 64: Indoor side wall reinforcing member 65: Glass receiver 66: Glass holder b: Connection means f: Thermal expansion refractory material n: Fixing means s: Sealing material

Claims (2)

A resin window frame attached to the opening of the building, and a resin shoji that can be opened and closed on the window frame,
The resin window frame and the resin ridges constituting the shoji each have a hollow portion,
At least one of the window frame and the ridge has a hollow rising wall extending toward the other side, and the other of the window frame and the ridge extends to one of the window frame and the ridge when the shoji is closed. It overlaps in the prospective direction against the rising wall,
In the hollow portion of the window frame and the hollow portion of the ridge, metal reinforcing members are respectively disposed so as to surround the space formed between the window frame and the ridge, and at least one of the reinforcing member window frame and the ridge is disposed. A fireproof resin sash comprising a refractory material that expands due to heat and fills a space surrounded by a reinforcing member , on a surface that faces the space formed therebetween. A resin window frame attached to the opening of the building, and a resin shoji that can be opened and closed on the window frame,
Either one of the resin window frame and the resin cage constituting the shoji has a hollow main body and a hollow rising wall extending toward the other side,
The other of the window frame and the ridge has a hollow portion that overlaps in a prospective direction with respect to the rising wall extended to one of the window frame and the ridge when the shoji is closed,
A window frame, and the hollow portion of the hollow portion and the rising wall of one of the main body portion of the stile, with the window frame and the other of the hollow portion of the stile is disposed a metallic reinforcing member,
On the surface of the reinforcing member disposed in the other hollow part of the window frame and the flange, the surface facing the space surrounded by the one main body part and the rising wall of the window frame and the fence and the other hollow part of the window frame and the flange is heated. A fireproof resin sash is provided, which is provided with a refractory material that expands and fills a space surrounded by a hollow portion .

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