JP2023027414A - Fitting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve fire retardant property of a fitting equipped with a ventilation unit.

SOLUTION: A ventilation unit 40 provided in a sash 30 includes a sub-frame body 410 and a sub-face material 420 supported inside the sub-frame body 410 to open/close, via a sub-bottom frame 412 constituting the sub-frame body 410. In a sub-upper frame 411 constituting the sub-frame body 410, contact fin parts 411b, 411c are respectively provided downward in an indoor side part and an outdoor side part. Sealing members 415, 416 for sealing a space with the sub-face material 420 are respectively provided in the contact fin parts 411b, 411c. A latch 450 for retaining the sub-face material 420 in a closed state is provided between the sub-upper frame 411 and the sub-face material 420. In the sub-upper frame 411, a thermally expansive member C2 is provided on a face of the sub-face material 420 facing the latch 450. In the sub-lower frame 412, the thermally expansive member C2 is provided on a face facing the sub-face material 420.

SELECTED DRAWING: Figure 7

COPYRIGHT: (C)2023,JPO&INPIT

Description

TECHNICAL FIELD The present invention relates to fittings, and more particularly to fire prevention measures for fittings having secondary shoji screens between building materials such as frames and stiles.

Some fittings have a sub-shoji for ventilation inside the frames that make up the shoji. A secondary shoji is a structure in which a secondary surface material is supported between secondary building materials so that it can be opened and closed. In this type of fittings, if the secondary shoji is opened, ventilation can be performed even when the shoji is closed, which is advantageous in terms of operability and crime prevention (see, for example, Patent Document 1).

JP 2016-8451 A

By the way, high fire resistance is often required for fittings these days. In the case of fittings that do not have a secondary shoji, for example, a heat-expandable member is arranged between the frame and the face material that constitute the shoji to enhance the fire resistance. In other words, in this fitting, when the shoji is exposed to high temperatures, the thermal expansive member expands and closes the gap between the stile and the face material, creating a situation in which flames pass through in the indoor and outdoor directions. will be prevented.

On the other hand, in order to improve the fire resistance of fittings with secondary shoji, in addition to arranging a thermally expandable member between the frames of the shoji and the facing material, It is conceivable to dispose a sub-thermally expansive member also between them. With such fittings, it is possible to prevent the occurrence of a physical through hole between the secondary building material and the secondary surface material of the secondary shoji. However, in actual fittings, there is a concern that flames may occur on the non-heated side of the sub-shoji, and there is still room for improvement. That is, in fittings with a secondary shoji, there is a space between the secondary building material and the frame of the shoji, and this space communicates with the gap between the frame and the panel material. For this reason, for example, when a flammable gas is generated from the face material due to the exposure of the fittings to high temperatures, it will reach the gap between the sub-building material and the frame of the shoji, and this combustible gas will be released into the non-flammable of the sub-shoji. If it blows out on the heating surface side, it may cause a situation of ignition.

In addition, the above-mentioned problem is not limited to between the frames of the shoji and the sub-shoji, but can also occur, for example, in a FIX window in which the face material and the sub-shoji are arranged on the frame.

SUMMARY OF THE INVENTION An object of the present invention is to provide fittings which are equipped with a secondary shoji but which are capable of enhancing fire resistance.

In order to achieve the above object, a fitting according to the present invention comprises a frame and a shoji arranged in the frame, wherein the shoji comprises a face material and a ventilation unit inside building materials that are assembled on all four sides, The ventilation unit includes a sub-frame and a sub-surface member supported in the sub-frame via a sub-bottom frame that constitutes the sub-frame so as to be openable and closable inside the sub-frame, and constitutes the sub-frame. The sub-upper frame is provided with contact fins facing downward at the indoor-side portion and the outdoor-side portion, respectively, and seals between the contact fins and the secondary surface member. A sealing member is provided, and a latch is provided between the sub-top frame and the sub-panel to maintain the sub-panel in a closed state, and the sub-top frame holds the latch of the sub-panel. A thermally expansive member is disposed on a surface facing the sub-lower frame, and a thermally expansible member is disposed on a surface of the sub-lower frame facing the sub-surface member.

According to the present invention, when the fitting is exposed to a high temperature, the thermally expansive member expands to close the accommodation portion between the building material and the secondary building material. Therefore, even if combustible gas is generated from the face material, this combustible gas does not reach the sub-sash, and there is no risk of causing a situation where the non-heated side of the sub-sash is ignited.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which looked at the fittings which are embodiment of this invention from the indoor side. FIG. 2 is a longitudinal sectional view of the fitting shown in FIG. 1; It is the cross-sectional view which fracture|ruptured the fitting shown in FIG. 1 in the part of a sub-sash. It is the cross-sectional view which fracture|ruptured the fitting shown in FIG. 1 in the part of a face material. It is an exploded cross-sectional view of the state which removed the sub-shoji from the inner shoji of the fittings shown in FIG. The secondary shoji which is applied to the fittings shown in FIG. 1 is shown, (a) is a view seen from the inside of the room, and (b) is a view seen from the outside. FIG. 7 is a vertical cross-sectional view of the secondary shoji shown in FIG. 6 in which the secondary panel is placed at the closed position; FIG. 7 is a vertical cross-sectional view of the secondary shoji shown in FIG. 6 in which the secondary panel is placed in the open position;

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of fittings according to the present invention will be described in detail below with reference to the accompanying drawings.
1 to 4 show fittings that are embodiments of the present invention. The fitting exemplified here is called a double sliding window in which two inner and outer shojis 20 and 30 are arranged with respect to the frame 10 so as to be slidable along the left-right direction. The frame body 10 is formed in a rectangular shape by forming an upper frame 11, a lower frame 12, and left and right vertical frames 13, 14 into a frame around all four sides.

The outer shoji 20 arranged on the outdoor side of the frame 10 has an upper frame 21, a lower frame 22 and left and right vertical frames 23, 24 which are assembled in a four-circumference frame, and a rectangular multi-layered glass 25 is arranged inside. It is composed by The inner shoji 30 disposed on the indoor side of the frame 10 has a rectangular double-layered glass (surface 35 and a ventilation unit (sub-shoji) 40 having a rectangular outer shape are arranged side by side vertically adjacent to each other. The multi-layered glass 25 of the outer shoji 20 and the multi-layered glass 35 of the inner shoji 30 are constructed by bonding a plurality of (for example, two) glass plates G to each other with spacer members S interposed therebetween.

The outer shoji 20 and the inner shoji 30 have substantially the same dimensions along the left and right sides, and are formed in such dimensions that the frame body 10 can be closed when the vertical frames 23 and 33 serving as a match are arranged side by side in the direction of projection. I have In the present embodiment, when the frame 10 is closed, the fittings are exemplified in which the outer shoji 20 is arranged on the left side as seen from the inside of the room, and the inner shoji 30 is arranged on the right side as seen from the inside of the room. However, this is not necessarily the case, and a sliding window in which the inner shoji 30 and the outer shoji 20 are arranged in the left-right reversed fashion may also be used.

Here, the prospective direction mentioned above is a direction along the depth of the fittings, as indicated by an arrow A in the figure. A surface along the prospective direction may be referred to as a prospective surface. In addition, in this embodiment, the term "finding direction" is also used for the sake of convenience. In the case of building materials such as the upper frame 11 and the lower frame 12 that extend along the horizontal direction, the view direction is a vertical direction orthogonal to the view direction. In the case of building materials such as the vertical frames 13 and 14 that extend along the vertical direction, the horizontal direction perpendicular to the projection direction is called the viewing direction. A plane along the viewing direction may be referred to as a viewing plane.

Hereinafter, the structure of the inner shoji 30 having the ventilation unit 40 will be described in detail, and the features of the present invention will also be described.

The upper frame 31, the lower frame 32, and the left and right vertical frames (building materials) 33, 34, which constitute the inner shoji 30, are extruded members formed of a metal such as an aluminum alloy, and are substantially uniform over the entire length along the length. It is configured to have a cross-sectional shape. As shown in FIGS. 2 and 5, these frames 31, 32, 33, and 34 are provided with accommodating portions 31a, 32a, 33a, and 34a on their facing inner surfaces. The accommodation portions 32a, 33a, 34a of the lower frame 32 and the left and right vertical frames 33, 34 accommodate the edges of the multi-layered glass 35 with the glazing channel B attached. It is configured between support fins 32b, 33b, and 34b projecting so as to face each other.

The double glazing 35 has substantially the same lateral dimensions as the double glazing 25 of the outer shoji 20, and both edge portions are accommodated in the accommodation portions 33a and 34a of the vertical frames 33 and 34, respectively. . The vertical dimension of the double glazing 35 is configured to be shorter than the double glazing 25 of the outer shoji 20.例文帳に追加Therefore, the double glazing 35 is in a state in which the lower edge is accommodated in the accommodation portion 32 a of the lower frame 32 while there is a gap between the upper edge and the upper frame 31 . Reference numeral 36 in FIG. 2 denotes a setting block that positions the multi-layered glass 35 with respect to the inner shoji 30 by being interposed between the lower frame 32 and the end surface of the multi-layered glass 35 .

The storage portions 33a and 34a of the vertical frames 33 and 34 are provided with a heating foam material C1 over the entire length thereof. The heating foam material C1 is an incombustible or flame-retardant fireproof member that expands with heat. As this type of thermal foaming material C1, for example, so-called expanded graphite containing graphite having thermal expansibility can be applied.

As shown in FIGS. 5 to 8, the ventilation unit 40 includes a rectangular sub-frame 410 and a sub-surface member 420 supported by the sub-frame 410 so as to open and close the opening of the sub-frame 410. It is provided in a rectangular area formed between the upper frame 31 , the left and right vertical frames 33 and 34 and the upper edge surface of the double glazing 35 .

The sub-frame body 410 is configured by framing a sub-upper frame 411, a sub-lower frame 412 and left and right sub-vertical frames (sub-building materials) 413 on all four sides. The sub-upper frame 411, the sub-lower frame 412, and the left and right sub-vertical frames 413 are extruded members formed of metal such as aluminum alloy, and are configured to have a substantially uniform cross-sectional shape over the entire length along the length. There is.

The sub-upper frame 411 has a flat-plate-like upper-frame base 411a extending substantially horizontally along the projection direction. An inward upper abutment fin portion 411b extending downward is provided on the lower surface of the upper frame base portion 411a, which is the indoor side. An outer upper contact fin portion 411c extending downward is provided. The outer upper contact fin portion 411c has a larger projecting dimension than the inner upper contact fin portion 411b, and the lower end edge thereof is bent substantially at a right angle toward the interior side. Sealing members 415 and 416 are attached to the facing surfaces of the inner upper contact fin portion 411b and the outer upper contact fin portion 411c facing the interior of the room, respectively. Two fitting upper fins 411d and 411e and an upper screw hole 411f are provided on the upper surface of the upper frame base 411a. The fitting upper fins 411d and 411e protrude upward from the upper surface of the upper frame base 411a. These two fitting upper fins 411 d and 411 e are configured such that the distance between the outer surfaces thereof is such that they can be fitted into the accommodating portion 31 a of the upper frame 31 . The upper screw hole 411f is open at both left and right ends and is formed between the two fitting upper fins 411d and 411e.

The sub-lower frame 412 has a flat-plate-like lower-frame base portion 412a that extends substantially horizontally along the projection direction. Two engaging fins 412b extending downward are provided on the edge of the lower frame base 412a on the outside and the edge on the inside of the room. An inner trapezoidal fin portion 412c is provided at a substantially intermediate portion. The two engaging fins 412b and the lower frame base 412a form a sub-frame housing 412d having the same dimensions as the housing 31a of the upper frame 31, and protrude from both side edges of the lower frame base 412a. It is set up to The inner trapezoidal fin portion 412c protrudes upward from the upper surface of the lower frame base portion 412a, then bends at a substantially right angle and extends substantially horizontally toward the interior of the room. A lower screw hole 412e is provided at the bent inner corner of the inner trapezoidal fin portion 412c, and a sealing member 417 is attached to the extending edge of the inner trapezoidal fin portion 412c. Like the upper screw hole 411f, the lower screw hole 412e is configured so that both left and right ends are open. Further, a supporting base fin portion 412f is provided on the facing surface facing the interior of the engaging fin portion 412b provided on the indoor side. The support fin portion 412f has a flat plate shape extending substantially horizontally from the engagement fin portion 412b toward the interior side. A hinge shaft element 412g that constitutes a shape member hinge between the upper surface of the support base fin portion 412f and the secondary surface member 420 described later is provided.

The left and right sub-vertical frames 413 have mutually symmetrical configurations. In this embodiment, the sub-vertical frame 413 is formed by providing an inner vertical contact fin portion 413b and an outer vertical contact fin portion 413c on a flat plate-like vertical frame base portion 413a that extends substantially vertically along the projection direction. is configured. The inner vertical abutment fins 413b extend inward from the interior side of the inner side surfaces of the vertical frame base 413a facing each other. The outer vertical abutting fins 413c extend inward from the edges of the facing inner side surfaces of the vertical frame base 413a facing each other, and protrude more than the inner vertical abutting fins 413b. It is large in size. Seal members 418 and 419 are attached to the inner vertical contact fin portion 413b and the outer vertical contact fin portion 413c, respectively, on the facing surfaces facing the interior of the chamber. Two fitting vertical fins 413d and 413e are provided on the outer surface of the vertical frame base 413a. The fitting vertical fins 413d and 413e protrude outward from the outer surface of the vertical frame base 413a. These two fitting vertical fins 413d and 413e are configured such that the distance between the outer surfaces thereof is such that they can be fitted into the housing portions 33a and 34a of the vertical rails 33 and 34, respectively.

These sub-vertical frames 413 have screw insertion holes (not shown) in portions corresponding to the upper screw holes 411f of the sub-upper frame 411 and the lower screw holes 412e of the sub-lower frame 412, respectively. By screwing screws 430 into the upper screw holes 411f and the lower screw holes 412e via the upper and lower screw holes 411f and 412e, the sub-frame body 410 is configured together with the sub-upper frame 411 and the sub-lower frame 412. As shown in FIG. In the state in which the sub-frame body 410 is configured, the sealing member 417 provided on the inner trapezoidal fin portion 412c of the sub-lower frame 412 and the sealing member 415 provided on the inner upper contact fin portion 411b of the sub-upper frame 411. , and the sealing member 418 provided on the inner vertical contact fin portion 413b of the sub vertical frame 413 are arranged on the same vertical plane. The seal member 419 provided on the outer vertical contact fin portion 413c and the seal member 416 provided on the outer upper contact fin portion 411c of the sub-upper frame 411 are arranged on the same vertical plane.

As shown in FIGS. 2 and 3, the sub-frame body 410 configured as described above has fitting upper fins 411d and 411e provided on the sub-upper frame 411 fitted into the housing portion 31a of the upper frame 31, and Fitting vertical fins 413d and 413e provided on the sub-vertical frame 413 are fitted to the housing portions 33a and 34a of the vertical frames 33 and 34, respectively, so as to be attached to the upper portion of the inner shoji 30. As shown in FIG. In this state, the upper edge of the multi-layered glass 35 is housed in the sub-frame housing portion 412d formed by the engaging fin portion 412b of the sub-lower frame 412, and the ventilation unit 40 overlaps with the upper frame 31. The gap with the layer glass 35 is closed. Although not shown in the figure, the engaging fins 412b protruding from both sides of the lower frame base 412a of the sub-lower frame 412 are inserted into the housings 33a and 34a through notches provided in the vertical bars 33 and 34, respectively. , and functions to prevent vertical relative movement of the sub-frame 410 with respect to the vertical frames 33 and 34 . Therefore, the multi-layered glass 35 of the inner shoji 30 is supported on all four sides by the sub-lower frame 412 of the sub-frame 410, the lower frame 32 of the frame 10, and the left and right vertical frames 33,34.

As shown in FIGS. 5 to 8, the secondary face member 420 is constructed by attaching side plates 422 to both side end portions of a face member base portion 421, respectively.
The face material base portion 421 is formed by integrally molding a face plate portion 421a having a rectangular flat plate shape and a rectangular tubular portion 421b provided on the surface of the face plate portion 421a facing the outside of the room.

The face plate portion 421a is sized to be placed in the rectangular opening formed by the sub-upper frame 411, the sub-lower frame 412 and the left and right sub-vertical frames 413. As shown in FIG. More specifically, above and below the face plate portion 421a are a seal member 415 provided on the inner upper contact fin portion 411b of the sub-upper frame 411 and a seal member provided on the inner trapezoidal fin portion 412c of the sub-lower frame 412. The dimensions are set so as to cover the member 417 at the same time. The left and right sides of the face plate portion 421a are formed to have dimensions smaller than the mutual distance between the outer vertical contact fin portions 413c of the sub vertical frame 413. As shown in FIG. A hinge receiving element 421c is provided at the lower edge of the face plate portion 421a. The hinge receiving element 421c constitutes a profile hinge between itself and the hinge shaft element 412g of the secondary lower frame 412 described above. That is, the hinge receiving element 421c rotatably supports the face plate portion 421a with respect to the sub-lower frame 412 by engaging with the hinge shaft element 412g of the sub-lower frame 412 . In the present embodiment, the profile hinge is configured so that the face plate portion 421a can rotate around a hinge shaft extending left and right along the horizontal direction. As a result, the face plate portion 421a can move between a closed position in the vertical direction as shown in FIG. 7 and an open position where the upper edge protrudes toward the interior of the room as shown in FIG. Become. When the face plate portion 421a is arranged at the closed position, the sealing member 415 of the inner upper abutting fin portion 411b and the sealing member 417 of the inner trapezoidal fin portion 412c are placed on the surfaces of the face plate portion 421a facing the outside of the room. It is in a state of being pressed by On the other hand, when the face plate portion 421a is arranged at the open position, the seal member 415 of the inner upper contact fin portion 411b and the seal member 417 of the inner trapezoidal fin portion 412c are separated from the face plate portion 421a.

Reference numeral 440 in FIG. 8 denotes a link mechanism provided between the vertical sub-frame 413 of the sub-frame body 410 and the sub-surface member 420 . The link mechanism 440 limits the opening angle of the sub-surface member 420 with respect to the sub-frame 410 by bringing the slider 441 provided on the sub-frame 410 into contact with the stopper member 442 . Reference numeral 450 in FIG. 7 denotes a latch that maintains the sub-surface member 420 in the closed position by engaging with the sub-frame body 410 when the sub-surface member 420 is arranged in the closed position. That is, in order to move the secondary surface member 420 arranged at the closed position to the open position, the release operation of the latch 450 is required. When the secondary surface member 420 arranged at the open position is moved to the closed position, the latch 450 is automatically engaged.

As shown in FIGS. 5 to 8, when the face plate portion 421a is placed in the closed position, the lower surface of the outer circumference of the square tube portion 421b faces the inner trapezoidal fin portion 412c of the sub-lower frame 412, and is located on the outdoor side. The upper corner of the upper sub-frame 411 abuts on a sealing member 416 provided on the outer upper abutting fin portion 411c of the sub-upper frame 411. As shown in FIG. As is clear from the figure, screw holes 421d are provided in the upper and lower portions of the rectangular tubular portion 421b. The screw hole 421d is open at both left and right ends. The upper screw hole 421d is provided on the inner peripheral lower surface of the square tubular portion 421b, and the lower screw hole 421d is provided on the outer peripheral lower surface of the square tubular portion 421b.

The side plates 422 attached to both side ends of the face material base 421 have mutually symmetrical configurations. In the present embodiment, the side plate base portion 422a has a flat plate shape and is large enough to cover the opening of the square tubular portion 421b, and the face plate extension is bent outward from the edge portion of the side plate base portion 422a located on the indoor side at a substantially right angle. A side plate 422 is configured with a portion 422b.

The side plate base portion 422a has screw insertion holes (not shown) at portions corresponding to the screw holes 421d of the rectangular tubular portion 421b. The side plate 422 is attached to both ends of the face material base 421 by screwing screws 431 into the screw holes 421d through the screw holes of the side plate base 422a. The face plate extension portions 422b are arranged on the extension of the face plate portion 421a on both sides of the face plate portion 421a, and are capable of coming into contact with the seal member 418 provided on the inner vertical contact fin portion 413b of the sub vertical frame 413 at the same time. It is formed to the dimensions that can be done.

As is clear from the drawing, the four circumferences between the sub-frame body 410 and the sub-surface member 420 are provided with heating foam members (sub-thermally expansible members) C2. The heating foam material C2 is of the same type as the heating foam material C1 provided on the vertical frames 33,34. In the present embodiment, as shown in FIGS. 5 and 7, the sub-upper frame 411 has a sub-upper frame 411 on the lower surface facing the sub-surface member 420 and the sub-lower frame 412 on the inner trapezoidal insert. The heating foam material C2 is arranged on the upper surface facing the side plate 420, and the heating foam material C2 is arranged on the surface of the face plate extension 422b of the side plate 422 facing the outside of the room. The upper frame base portion 411 a of the secondary upper frame 411 is provided with a latch receiver 451 for the latch 450 described above on the lower surface facing the secondary surface member 420 . For this reason, the heating foam material C2 is arranged on both sides of the lower surface of the upper frame base portion 411a so as to be separated by the latch receiver 451, and the heating foam material C2 is arranged on the surface of the latch receiver 451. There is. Also, the heating foam material C2 disposed on the face plate extension 422b of the side plate 422 can be touched by hand when the secondary face member 420 is moved to the open position. Therefore, the heating foam material C2 of the face plate extension portion 422b is restricted from peeling off from the face plate extension portion 422b by the pressing member 460. As shown in FIG. The pressing member 460 is formed by integrally molding a mounting plate portion 460a having a flat plate shape and a pressing plate portion 460b bent substantially perpendicularly from one end edge of the mounting plate portion 460a. It is attached to the outer surface of the side plate base portion 422a via the attachment plate portion 460a while in contact with the surface of the material C2. In this embodiment, the pressing member 460 is attached to the side plate base portion 422a using the screws 431 for attaching the side plate 422 to the face material base portion 421 in particular.

Furthermore, in this ventilation unit 40, a heating foaming material (thermally expansible member) C3 is arranged at a portion of the vertical frame base portion 413a of the sub vertical frame 413 that faces the housing portions 33a and 34a of the vertical frames 33 and 34. In addition, the heating foam material C3 is also disposed on the lower surface of the lower frame base portion 412a of the sub-lower frame 412 facing the sub-frame accommodating portion 412d. These heating foam materials C3 are also of the same type as the heating foam materials C1 provided on the vertical frames 33,34. As described above, the storage portions 33a and 34a of the vertical frames 33 and 34 are provided with the heating foam material C1 over the entire length thereof. Therefore, between the sub-vertical frame 413 and the vertical rails 33, 34, the heating foam material C1 provided on the vertical rails 33, 34 and the heating foam material C3 provided on the sub-vertical frame 413 are arranged. It will be.

In addition, in this fitting, as shown in FIG. 2, the heating foam material C4 is also disposed in the accommodation portion 31a of the upper frame 31, and as shown in FIG. A hollow portion 33c of 33 is also provided with a reinforcing material D and a heating foam material C5.

In the inner shoji 30 configured as described above, when the face plate portion 421a of the secondary surface member 420 is arranged in the closed position, the sealing member 415 of the inner upper contact fin portion 411b and the sealing member 417 of the inner trapezoidal fin portion 412c , the seal members 418 of the inner vertical contact fins 413b are in contact with the face plate 421a. Therefore, when the face plate portion 421a is arranged at the closed position, ventilation through the sub-frame body 410 is blocked, and ventilation through the ventilation unit 40 is not performed.

On the other hand, when the face plate portion 421a is arranged at the open position, the seal member 415 of the inner upper contact fin portion 411b, the seal member 417 of the inner trapezoidal fin portion 412c, and the seal member of the inner vertical contact fin portion 413b. 418 is separated from the face plate portion 421a and the sub-frame body 410 is opened. As a result, even when the frame 10 is closed by the shojis 20 and 30, if the latch 450 is released and the face plate portion 421a of the secondary face member 420 is moved to the open position, the room is ventilated through the ventilation unit 40. It is possible to do

Moreover, according to the fittings described above, the heating foam material C2 is provided on all four sides between the sub-frame body 410 and the sub-surface member 420 . Therefore, when the fittings are exposed to high temperatures in the event of a fire or the like, the expansion of the heating foam material C2 blocks the four circumferences between the sub-frame body 410 and the sub-surface material 420. As a result, even if the fittings are exposed to high temperatures, there is no possibility that a through hole that penetrates the room and the outside will be formed in the ventilation unit 40 .

Furthermore, when the fittings are exposed to high temperatures, the heating foam material C1 provided in the housing portions 33a and 34a of the vertical frames 33 and 34 and the heating foam material C3 provided in the vertical frame base portion 413a of the sub-vertical frame 413 expand. As a result, the portions of the accommodation portions 33a and 34a of the vertical rails 33 and 34 facing the sub-vertical frame 413 are reliably closed.

Therefore, when the multi-layered glass 35 is exposed to high temperature, for example, combustible gas is generated from the spacer member S, and furthermore, the gap between the accommodation portions 33a, 34a of the vertical frames 33, 34 and the multi-layered glass 35 is completely closed. Combustible gas generated from the multi-layered glass 35 does not reach between the vertical frames 33 and 34 and the sub vertical frame 413 even if it is not blocked by the vertical frame 413 . In addition, in the fittings described above, since the heating foam material C3 is also disposed in the lower frame base portion 412a of the sub-lower frame 412, the sub-frame accommodating portion 412d is also closed when exposed to high temperatures. , the combustible gas from the multi-layer glass 35 can be reliably prevented from reaching between the vertical frames 33 and 34 and the sub-vertical frame 413. As a result, combustible gas does not blow out from the ventilation unit 40, and there is no risk of flames occurring on the non-heated surface opposite to the heated surface.

In the above-described embodiment, a double sliding window is exemplified as a fitting, but a shoji that opens and closes in the out-of-plane direction of the frame such as a casement window may be used, or a fixed window may be used. In addition, it can be similarly applied even if the shoji or the face material is fixed to the building material. In addition, although the ventilation unit in which the secondary surface material is arranged to be openable and closable with respect to the sub-frame body is exemplified as the secondary shoji, it is not necessarily limited to this, and it may be arranged between two building materials. Others may also be used. In this case, it is not necessarily arranged between the building materials along the vertical direction, but may be arranged between the building materials along the horizontal direction. In addition, although the secondary surface material 420 is configured by attaching the side plates 422 to the both side ends of the surface material base 421, it is not necessarily limited to this. But I don't mind. Furthermore, although the multi-layered glass 35 is exemplified as the face material, it is not necessarily limited to this, and for example, a panel that does not have translucency may be applied as the face material.

Further, in the above-described embodiment, the heating foam material C1 is arranged along the entire length of the housing portions 33a and 34a of the vertical frames 33 and 34, which is more preferable in terms of fire prevention. However, the present invention is not necessarily limited to this, and it suffices that the thermally expandable member is arranged only in the portion facing the secondary building material in the housing portion for the building material. In this case, since the heat-expandable member is provided in the secondary building material in the above-described embodiment, it is possible to use common building materials for the inner shoji with the secondary shoji and the inner shoji without the secondary shoji. becomes. However, the thermally expandable member may be attached to the building material.

30 inner shoji, 33, 34 vertical frame, 33a, 34a housing part, 35 multi-layer glass, 40 ventilation unit, 410 sub-frame, 413 sub-vertical frame, 420 sub-surface material, 460 pressing member, C2 heating foam material, C3 heating foam

Claims (1)

A frame and a shoji arranged in the frame,
The shoji includes a face material and a ventilation unit inside the building material that is assembled on all four sides,
The ventilation unit includes a sub-frame and a sub-surface member that is openably and closably supported inside the sub-frame through a sub-lower frame that constitutes the sub-frame,
In the sub-upper frame constituting the sub-frame body, a contact fin portion is provided downward on each of the indoor-side portion and the outdoor-side portion. A sealing member is provided for sealing between the material,
A latch is provided between the sub-upper frame and the sub-surface member to maintain the sub-surface member in a closed state,
A thermal expansion member is disposed on the surface of the sub-upper frame facing the latch of the sub-surface member,
A fitting characterized in that a heat-expandable member is disposed on a surface of the sub-lower frame facing the sub-surface member.

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