JP7130804B2 - sash - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat insulating sash installed in an opening of a building.

Conventionally, sashes installed in openings of buildings are required to have heat insulation properties. Sliding insulating sashes that prevent transmission are known.
Also known is a composite heat-insulating sash in which the indoor-side portions of the frame and the frame are made of a resin profile to improve the heat insulating performance.
Then, in the sliding type heat insulating sash, the area between the outer guide rail of the outdoor member and the inner guide rail of the indoor member is covered with a resin cover member, and a shielding member is provided on the outdoor side of the inner guide rail. A heat insulating sash has been known in which heat insulating performance is improved by preventing external air from directly hitting the guide rail by providing the heat insulating sash (Patent Document 1).

JP-A-2001-55869

Normally, in a sliding type sash, the shoji and frame are sealed with a tight material to isolate the outdoor space from the indoor space. Cold heat is transmitted to the indoor space by convection in the space between them, leading to a decrease in insulation performance. In particular, between the upper surface of the shoji and the inner peripheral surface of the upper frame, it is necessary to secure a large space for the convenience of securing the vertical dimension by Kendon. There is also a limit to the contact between the upper surface of the shoji and the inner peripheral surface of the upper frame.
In the heat insulating sash of Patent Document 1, by providing a shielding member, the direct contact of the outside air to the guide rail of the indoor member is suppressed and the heat insulating performance is improved. The transfer of cold heat due to air convection in the space between the surfaces was not considered.
Therefore, the cold heat transmitted from the outside to the outdoor member is transmitted to the air as radiant heat from the indoor surface of the guide rail of the outdoor member, and is further transmitted to the room by air convection in the space between the shoji and the frame. There was a possibility that it would be lost.
In addition, in a composite heat insulating sash in which the indoor part of the frame is made of resin, the cold heat transmitted through the screws for fixing the resin is dissipated into the space between the shoji and the frame. There was a possibility that it would be transmitted into the room due to the convection of the air.

The present invention has been made in view of the above circumstances, and is a heat insulating sash that can improve heat insulating performance by suppressing the convection of cold-heated air into the indoor space without giving resistance to the opening and closing operation of the shoji. It is intended to provide

An embodiment of the present invention comprises a lower frame fixed to a building opening and a shoji supported by the lower frame so as to be openable and closable. The lower frame is formed of a metal material and attached to the building opening. a resin lower member disposed on the indoor side of the lower member, the lower member having an indoor side wall extending upward from the inner periphery, the resin lower member covering the upper end of the indoor side wall of the lower member, and the indoor side of the lower member; The forehead is arranged on the inner peripheral surface of the opening of the building by extending from the outside, and the forehead protrudes from the outdoor end toward the indoor side of the lower frame of the shoji in a non-contact state. The sash has a fin-like protrusion that separates the space between the lower resin member of the lower frame and the indoor side surface of the lower frame of the shoji from the indoor space.

It is possible to suppress the convection of the cold-heated air to the indoor space without giving resistance to the opening and closing operation of the shoji, and improve the heat insulation performance.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view of the heat insulation sash which concerns on the 1st Embodiment of this invention. 1 is a cross-sectional view of a heat insulating sash according to a first embodiment of the invention; FIG. FIG. 4 is a plan view of the meeting portion of the upper frame of the heat insulating sash of the present invention viewed from below; Fig. 3 is an enlarged vertical cross-sectional view of the upper frame portion of the heat insulating sash according to the first embodiment of the present invention; It is an enlarged vertical cross-sectional view of an upper frame portion of a heat insulating sash according to a second embodiment of the present invention. FIG. 4 is a perspective view illustrating a side surface of a lower corner portion of a frame near which the projecting portion of the heat insulating sash according to the embodiment of the present invention is located;

A configuration of a heat insulating sash according to an embodiment of the present invention will be described with reference to the drawings.
(Overall composition)
A heat insulating sash according to an embodiment of the present invention is installed at an opening of a building. It consists of inner and outer shojis 2, 3 formed by assembling lower frames 22, 32, left and right vertical frames (door frames 23, 34 and meeting frames 24, 33) in four circumferences and fitting a panel body to the inner circumference. Inner and outer shojis 2 and 3 are movably supported in the lateral direction along inner and outer guide rails formed on the frame 1, thereby forming a double sliding window.
In addition, the heat insulating sash of the present invention is not limited to double sliding windows, and any type of heat insulating sash can be used as long as it can be opened and closed by sliding a shoji sideways against a window frame, such as a single sliding window. may

-Embodiment-
An insulating sash according to a first embodiment of the invention will now be described with reference to FIGS.
(Configuration of frame)
The upper frame 11 includes an outdoor-side upper member 111 and an indoor-side upper member 112 formed of a metal material such as aluminum, and a connection made of a heat insulating material such as resin that connects the outdoor-side upper member 111 and the indoor-side upper member 112. It is composed of a member 113 and a resin upper member 114 arranged and fixed on the inner circumference of the lower surface of the indoor-side upper member 112 .
An outside guide rail (guide rail) 111a for guiding the outside shoji 3 hangs down from the lower surface of the outdoor side upper member 111, and an inside shoji 2 is hung down.

The upper resin member 114 includes an exterior wall portion 114a covering the interior surface of the inner guide rail 112a of the interior-side upper member 112, an upper wall portion 114b covering the lower surface of the interior-side upper member 112, and an interior-side end of the upper wall portion 114b. It is composed of an interior wall portion 114c that hangs further downward, and a forehead portion 114d that extends from the lower end of the interior wall portion 114c toward the interior side.
Then, in a state where the upper wall portion 114b of the resin upper member 114 is engaged with the room-side upper member 112, the resin upper member 114 is fixed firmly to the opening of the building by fixing them from the inner peripheral side with screws g or the like that penetrate both. installed.

Between the outer guide rail 111a and the inner guide rail 112a, a resin-made inter-rail upper cover 51 covering the lower surface of the outdoor upper member 111 is arranged.
The inter-rail upper cover 51 is configured as a substantially flat plate-like long member having a length approximately half the length of the upper frame 11 , and is installed at least above the joint portion of the upper frame 11 . d and the left vertical frame 14 to prevent cold heat from being transferred to the room from the lower surface of the outdoor upper member 111 exposed to the room when the inner and outer shoji 2, 3 are closed. .

On the lower surface of the inter-rail upper cover 51 on the indoor side of the outer guide rail 111a and on the lower surface of the upper wall portion 114b of the upper resin member 114 on the indoor side of the inner guide rail 112a, a fin-like soft material such as soft resin is formed. The protruding portions 71 and 72 of the sliding doors 71 and 72 hang downward while being inclined toward the interior side, and are provided so as to approach or abut on the upper surfaces of the outer and inner shojis 2 and 3 .

Since the projections 71 and 72 are made of a soft material so that they can be deformed and restored, the fin-like projections 71 and 72 can be easily deformed when the inner and outer shojis 2 and 3 are erected with Kendon. It is possible to smoothly perform erection work. In addition, after construction, the original shape is restored and the lower ends of the projecting portions 71 and 72 can be brought close to or in contact with the upper surfaces of the inner and outer shojis 2 and 3. While securing a sufficient space between the upper surfaces of the two and three shojis to allow the shoji to be erected, the projections 71 and 72 can block at least a part of the space after the erection is completed.

As a result, the space between the inner peripheral surface of the upper frame 11 on the indoor side of the outer and inner guide rails 111a and 112a and the upper surfaces of the outer and inner shojis 2 and 3 is separated from the indoor space. This suppresses convection in which the air to which cold heat is transmitted from the indoor side surface flows through the space into the room.

Furthermore, since the protruding portions 71 and 72 are hung down while being inclined toward the interior side as they go downward, the deformation during erection of the shoji is performed uniformly over the entire length in the longitudinal direction, and twisting occurs in the middle. can be prevented from occurring, and a favorable proximity or contact state can be maintained during restoration.

The fin-shaped protrusions 71 and 72 can be formed by integrally molding a soft resin with the inter-rail upper cover 51 or the resin profile of the upper resin member 114, but only the fin-shaped protrusions 71 and 72 can be formed. can be formed separately and attached to the inter-rail upper cover 51 or the upper resin member 114 by engaging means or the like. Further, the protruding portions 71 and 72 may be hard fin members supported so as to swing by a semicircular hollow portion made of a soft material, a hinge portion, or the like, or may be provided on the upper surface of the shoji. . In addition, there is no particular limitation as long as it is a member that deforms when the shoji is erected and restores itself after the erection is completed.

A projecting portion 81 is provided at the lower end of the indoor wall portion 114c of the upper resin member 114 so as to be close to the indoor side surface of the upper frame 21 of the inner shoji 2 . The projecting portion 81 is formed as a fin piece integrally formed with the upper resin member 114, and separates the space on the upper surface of the inner shoji 2 from the indoor space to fix the inner guide rail 112a and the upper resin member 114. The air to which the cold heat is transmitted through the screw g is suppressed from flowing into the room through convection between the upper surface of the inner shoji 2 and the lower surface of the upper frame 11. - 特許庁
The protrusion 81 separates the upper surface of the inner shoji 2 from the indoor space and suppresses the convection of air. It is possible to suppress the cold heat applied, and furthermore, it is possible to obtain good heat insulation performance. Furthermore, by forming the fin-like protrusions 72 and the protrusions 81 on the resin upper member 114, it is possible to form a space surrounded by the resin material by the resin portions of the frame and the shoji and the protrusions 72 and 81. , can improve the heat insulation.

The lower frame 12 includes an outdoor-side lower member 121 and an indoor-side lower member 122 formed of a metal material such as aluminum, and a connection made of a heat insulating material such as resin that connects the outdoor-side lower member 121 and the indoor-side lower member 122. It is composed of a member 123 and a resin lower member 124 that is arranged and fixed on the inner circumference of the upper surface of the indoor-side lower member 122 .
An outer guide rail 121a for guiding the outer shoji is provided on the upper surface of the lower outdoor member 121 near the outdoor side, and an inner guide rail 122a for guiding the inner shoji is provided from the end of the lower member 122 on the outdoor side. .
Between the outer guide rail 121a and the inner guide rail 122a, a resin-made inter-rail lower cover 52 covering the upper surface of the outdoor lower member 121 is arranged.

The inter-rail lower cover 52 is configured as a substantially flat elongated member having a length approximately half that of the lower frame 12 , and is provided at least at a position below the meeting portion of the lower frame 12 . (not shown) and the left vertical frame 14 to suppress the transmission of cold heat to the room from the upper surface of the outdoor side lower member 121 exposed to the room when the inner and outer shoji 2, 3 are closed. is doing.

The resin lower member 124 includes a bottom wall portion 124a that covers the upper surface of the indoor-side lower member 122, an interior wall portion 124b that extends upward from the interior-side end of the bottom wall portion 124a, and an interior-interior side of the interior wall portion 124b. A projecting portion 82 is provided on the upper end of the indoor wall portion 124b of the lower resin member 124 so as to be close to the indoor side surface of the lower frame 22 of the inner shoji 2. , The space between the inner peripheral surface of the lower frame 12 and the upper surface of the inner shoji 2 on the indoor side of the inner guide rail 122a is separated from the indoor space, and the air transferred from the indoor side surface of the inner guide rail 122a flows into the room. Suppresses convection.

The right vertical frame 13 is formed of a metal material such as aluminum, and has a main body member 131 provided with a pull piece 131a on the inner peripheral surface of which a pull block f arranged on the door frame 23 of the inner shoji 2 abuts. , and a resin right member 132 arranged and fixed on the inner peripheral surface of the main body member 131 on the indoor side.

The resin right member 132 includes a mounting portion 132a engaged with the main body member 131, a right vertical wall portion 132b extending in the inner peripheral direction from the indoor end of the mounting portion 132a, and an inner peripheral end of the right vertical wall portion 132b. It is composed of a frame portion 132c extending to the indoor side, and in a state where the mounting portion 132a is engaged with the main body member 131, by fixing them from the inner peripheral side with a screw g or the like that penetrates both, the opening of the building can be opened. firmly attached to the part.

A projecting portion 83 is provided so as to be closer to the indoor side surface of the door frame 23 of the inner shoji 2 than the outer side surface of the inner peripheral end chamber of the right vertical wall portion 132b of the right resin member 132. The space between the surface and the inner peripheral surface of the right vertical frame 13 is separated from the indoor space to suppress the convection of air passing through the space between the door tip surface of the inner shoji 2 and the inner peripheral surface of the right vertical frame 13. .

The left vertical frame 14 is formed of a metal material such as aluminum, and has a main body member 141 provided with a pulling piece 141a against which the pulling block f arranged on the door frame 34 of the outer shoji 3 abuts on the inner peripheral surface. , and a resin left member 142 arranged and fixed on the inner peripheral surface of the main body member 141 on the indoor side.

The resin left member 142 is composed of a main body portion 142a that is engaged with the main body member 141 and covers the inner peripheral surface of the left vertical frame 14 on the indoor side, and a forehead portion 142b that extends to the indoor side of the main body portion 142a. A projecting portion 84 is provided so as to be close to the indoor side surface of the door frame 34 of the outer shoji 3 from the inner peripheral end of the outer surface of the main body portion 142a, and the door tip surface of the outer shoji 3 and the inner periphery of the left vertical frame 14 are provided. The space between the surfaces is separated from the indoor space to suppress convection in which the cold-heated air flows through the space into the room.

In the above embodiment, the projections 81 to 84 are fin-shaped as shown in FIG. Also, by making the protruding portion into a hollow structure, it is possible to suppress the convection of air and to improve the heat insulating property by the air in the hollow portion.

The main body portion 142a of the left resin member 142 is provided with mounting recesses 142c that are open in the inner peripheral direction at a plurality of locations in the vertical direction. , and are fixed to the opening of the building by fixing them at a plurality of locations from the inner peripheral side with screws g or the like passing through both.
The mounting recess 142c may be configured as a groove that continues in the longitudinal direction (vertical direction) of the left resin member 142. As shown in FIG.

A plurality of deformable fin-like projections 91, 91 extending toward the center (center line) of the opening are provided on the opening peripheral edge of the mounting recess 142c. 141 and fixed with a screw g or the like, the cold heat transmitted to the screw g or the like via the main body member 141 of the left vertical frame 14 made of aluminum or the like is suppressed from being transmitted into the room. At the same time, deterioration in design due to exposure of the head of the screw g or the like to the interior of the room is suppressed.

Since the fin-like protrusions 91, 91 are formed in a deformable fin-like shape, the fin-like protrusions 91, 91 can be deformed when fixing with screws g or the like. It is possible to restore and suppress the deterioration of the heat insulation performance due to the air convection in the mounting recess 142c.
By covering the mounting recess 142c with a batten plate instead of providing the fin-like protrusions 91, it is possible to suppress deterioration of the design while suppressing deterioration of the heat insulation performance.

(Structure of shoji)
The configuration of the shoji will be described using the inner shoji 2 .
The upper frame 21 of the inner shoji 2 is configured as a composite frame including an upper frame exterior portion 211 made of a metal material such as aluminum and an upper frame interior portion 212 made of resin or the like. A guide groove guided by an inner guide rail 112 a formed on the upper frame 11 is formed on the outer periphery of the upper frame 11 .

A tight material is attached to the upper end of the guide groove on the outdoor side and the upper end on the indoor side so as to be in contact with or close to the inner guide rail 112a. Outside air is prevented from entering the room directly through the space between the upper surface and the lower surface of the upper frame 11. - 特許庁

The lower stile 22 of the inner shoji 2 is configured as a composite stile consisting of a lower stile exterior portion 221 made of a metal material such as aluminum and a lower stile interior portion 222 made of resin or the like. A guide groove is formed on the outer circumference of the lower frame 22, and a wheel a running on an inner guide rail 122a formed on the lower frame 12 is arranged in the guide groove.

A tight material that abuts on the inner guide rail 122a is attached to the lower end of the guide groove on the outdoor side to seal the space between the lower frame 12 and the lower frame 22 so that the lower surface of the lower frame 22 and the upper surface of the lower frame 12 are kept airtight. It prevents outside air from entering the room directly through the gap.

The door frame 23 of the inner shoji 2 is configured as a composite frame consisting of a door frame exterior part 231 made of a metal material such as aluminum and a door frame interior part 232 made of resin or the like. .
At the outer periphery of the door frame 23, a drawing block f is installed that abuts on the drawing piece 131a formed on the right vertical frame 13, and at the outer peripheral end of the door frame outside part 231, the inner shoji 2 is installed. A tight material is attached that abuts on the drawing piece 131a when closed, and airtightly seals the space between the right vertical frame 13 and the door frame 23, and the outer peripheral surface of the door frame 23 and the inner peripheral surface of the right vertical frame 13. It prevents the outside air from entering the room directly through the gap between the

The meeting frame 24 of the inner shoji 2 consists of a meeting frame room outside part 241 formed of a metal material such as aluminum and a meeting frame room inside part 242 formed of resin or the like. 242 is integrated so as to cover the indoor side surface and the outer peripheral surface of the meeting frame outside part 241, that is, the surface exposed to the room when the shoji is closed, and is configured as a composite frame.
A piece is formed substantially in the center of the outdoor side surface of the meeting frame outdoor part 241, and cooperates with a piece formed on the indoor side face of the meeting frame 33 of the outside shoji 3 to form a smoke return c. is doing. In addition, a projecting portion 85 is provided on the outdoor side end of the outer peripheral surface portion of the gate frame interior portion 242 so as to be close to the indoor side surface of the gate frame 33 of the outside shoji 3. The space between the interlocking frame 33 and the interlocking frame 24 of the inner shoji 2 is separated from the indoor space to suppress air convection.

The outer shoji 3 differs from the inner shoji 2 in that the entire meeting frame 33 is made of a metal material such as aluminum and is not configured as a composite frame. A piece part constituting a smoke return c is provided on the indoor side surface of the meeting frame 33. - 特許庁In addition, a tight material is attached to the outer peripheral end of the indoor side surface to contact the meeting frame 24 of the inner shoji 2, and between the meeting frame 33 of the outside shoji 3 and the meeting frame 24 of the inner shoji 2 It prevents outside air from entering the room directly through the
The rest of the configuration of the outer shoji 3 is generally the same as that of the inner shoji 2, so the description is omitted.

In this embodiment, the inner shoji 2 is constructed as a tenon shoji by inserting the ends of the upper and lower frames 21 and 22 into the groove b on the inner periphery of the door frame 23 .
As can be seen in FIG. 6, in the mortise shoji, the projected dimensions of the upper and lower frames 21 and 22 are smaller than the projected dimension of the door frame 23 by the thickness dimension p. That is, the indoor side surface of the door end frame 23 is located inside the room by the thickness dimension p from the indoor side surfaces of the upper and lower frames 21 and 22 .
Therefore, when the inner peripheral opening of the frame 1 has a constant width over the four circumferences, the projections 81 and 82 provided on the outdoor side surfaces of the inner wall portions 114c and 124b of the upper and lower frames 11 and 12 and the , the distance between the upper and lower frames 21 and 22 and the indoor side surface is greater than the distance between the door frame 23 and the protrusion 83 provided on the outdoor side surface of the right vertical wall portion 132b of the right vertical frame 13. 23 is increased by the wall thickness dimension p.
In such a case, for the right vertical frame 13 (door frame), the projecting portion 83 of the right vertical wall portion 132b is formed by a small fin piece, or the projecting portion 83 is not provided on the right vertical wall portion 132b. By bringing the right vertical wall portion 132b directly close to the indoor side surface of the door frame 23, the distance between the projecting portion 83 of the right vertical frame 13 and the indoor side surface of the door frame 23, and the projecting portions of the upper and lower frames 11 and 12 The distances between the 81, 82 and the interior side surfaces of the upper and lower rails 21, 22 can be substantially the same.
In addition, it is preferable to appropriately select appropriate protrusions according to the distance between the parts, such as forming the protrusions 81 and 82 of the upper and lower frames 11 and 12 to be larger than the hollow portions.

Furthermore, when the upper and lower end caps 6 are attached to the upper and lower ends of the door frame 23 and the meeting frame 24 to cover the corners of the inner shoji 2, the upper and lower ends of the door frame 23 and the meeting frame 24 are For example, as shown in FIG. 6, the upper and lower end caps 6 provided on the upper and lower frames 21 and 22 are formed with vertical surfaces 61 at the same positions as the interior side surfaces of the upper and lower frames 21 and 22 in the prospective direction. , 22 is formed with a portion w extending in the lateral direction, and the distance between the upper and lower rails 21, 22 and the indoor side surfaces of the upper and lower rails 21, 22 is the same over the entire length of the protrusions 81, 82. is preferred.
On the side of the meeting frame 24, the projecting portions 81 and 82 on the side of the outside shoji are appropriately cut off with a cutter or the like so that the projections 81 and 82 and the upper and lower end caps 6 of the meeting frame 24 and the indoor side of the can be substantially the same, in which case it is not necessary to form vertical surfaces on the upper and lower end caps 6 of the meeting stile 24 .

The heat insulating performance of the heat insulating sash of the embodiment of the present invention will be verified.
As Example 1, a heat insulating sash having a fin-like protrusion 71 provided on the lower surface of the upper cover 51 between rails. A heat insulating sash provided with portions 81, 82, and 83 was used, and as a comparative example, the fin-like protrusion 71 and the protrusions 81, 82, and 83 were not provided.
Table 1 below shows the heat transmission coefficients of Examples 1 and 2 of the present invention and a comparative example.
The heat transmission coefficient is used as one of the criteria for evaluating the insulation performance of sashes, etc. When there is a temperature difference of 1 degree between the inside and outside of the sashes, etc., the amount of heat passing through 1m2 per hour is measured in watts. The smaller the number, the better the heat insulation.
In the table, LE3-G16-3 is Low-E 3 mm glass + 16 mm intermediate gas layer + float transparent 3 mm double-layered glass, LE3-A16-3 is Low-E 3 mm glass + 16 intermediate air layer. Multilayer glass of millimeter + transparent float 3mm glass, 3-G16-3 indicates a multilayer glass of transparent float 3mm glass + air layer 10mm + transparent float 3mm glass.

From Table 1, in any sash using double glazing, by providing a fin-shaped protrusion 71 on the lower surface of the inter-rail upper cover 51, a comparative example in which no protrusion is provided on any side of the window frame , the heat transmission coefficient is improved by 0.04 to 0.05 points, and furthermore, by providing protrusions 81, 82, and 83 on the upper resin member 114, the lower resin member 124, and the right resin member 132, respectively, The improvement is 0.04 to 0.05 points, and it can be seen that the heat insulating property of the sash is improved.

As described above, in the embodiment of the present invention, the projections 81, 82, and 83 provided on the inner peripheral ends of the upper and lower frames 11 and 12 and the right vertical frame 13 of the frame 1 allow the inside of the frame 1 to By separating the space between the peripheral surface and the outer peripheral surface of the inner shoji 2 and the indoor space, it is possible to suppress the convection of the air, to which cold heat is transmitted through the space, into the indoor space. Air to which cold heat is transferred from the indoor side surfaces of the guide rails 112a and 122a and air to which cold heat is transferred from the heads of the screws g that fix the resin frame members (the upper resin member 114 and the right resin member 132) flow through the space. It is possible to suppress the convection flowing through and into the room.
In addition, the projecting portion 84 provided on the left vertical frame 14 of the frame 1 and the fin-shaped projecting portions 91, 91 cause convection in which the air, to which cold heat is transmitted on the inner peripheral surface of the left vertical frame 14, flows into the room. can be suppressed.
Moreover, since the projecting portions 81, 82, 83, 84 provided on the frame 1 are close to the side surfaces of the frame in a non-contact state, the projecting portions 81, 82, 83, 84 do not move when the shoji is opened and closed. The sliding shoji can be smoothly opened and closed without coming into contact with the inner and outer shojis 2 and 3.

Furthermore, in the present embodiment, particularly in the upper frame portion where it is necessary to secure a large space, the lower surface of the upper resin member 114 of the upper frame 11 and the resin upper member 114 arranged between the guide rails of the upper frame 11 are provided. Protrusions 71 and 72 are formed to extend downward from the lower surface of the inter-rail upper cover 51 .
If any one of the projections 71, 72, 81 to 84, 91 described above is provided, the effect of improving the heat insulation performance is obtained even by itself. Projections 81, 82, and 83 provided on the inner peripheral end of the right vertical frame 13, a projecting portion 84 provided on the inner peripheral portion of the left vertical frame 14, and a projecting portion 71 formed on the lower surface of the upper frame 11 A space separated from the indoor space can be formed along approximately four circumferences of the sash, and the transmission of cold heat due to air convection can be prevented more efficiently.

In addition, it is preferable that the tip of each projecting part abuts on either the upper frame or the upper frame or is about 2 mm or less. It is possible to improve the heat insulation performance.

1 window frame 11 upper frame 111a outer guide rail 111b inner guide rail 12 lower frame 13 right vertical frame 14 left vertical frame 2 inner shoji 21 upper frame 22 lower frame 23 door frame 24 meeting frame 3 outer frame 31 upper frame 32 bottom Frame 33 Meeting frame 34 Door frame

51 Upper cover between rails 52 Lower cover between rails

71, 72 protrusions 81 to 85 protrusions 91 protrusions

Claims (1)

Equipped with a lower frame fixed to the opening of the building and a shoji supported by the lower frame so that it can be opened and closed,
The lower frame includes a lower member formed of a metal material and attached to the opening of the building, and a resin lower member arranged on the indoor side of the lower member,
The lower member has an inner side wall extending upward from the inner periphery,
The resin lower member has a forehead covering the upper end of the indoor side wall of the lower member and extending into the room and arranged on the inner peripheral surface of the building opening,
The forehead has a fin-like protruding part that protrudes from the outdoor end toward the indoor side of the lower frame of the shoji in a non-contact manner, and has a resin lower member of the lower frame and the indoor of the lower frame of the shoji. A sash that separates the space between the sides from the interior space.

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