JP2017066747A - Composite fittings - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve indoor/outdoor heat insulation without installing a bridge member at a sill.SOLUTION: A double sliding window 1 comprises a metal-made outer rail 15 which has an inner paper sliding door and an outer paper sliding door 8 housed within a frame body 5 to be opened and closed and also guides the outer paper sliding door 8, and an inner rail 16 which guides the inner paper sliding door. The inner rail 16 is provided with a hybrid rail 38 and a metal rail on the same line. The hybrid rail 38 has a resin-made resin cover member 45 coupled between a base 43 provided to a metal sill 3a and a metal-made rail part 46. The base 43 and rail part 46 are separated by a resin cover member 45.SELECTED DRAWING: Figure 3

Description

  The present invention relates to various composite fittings such as a sliding window and a sliding window in which a shoji is placed in a frame having a metal frame and a resin frame.

Conventionally, for example, a sliding window described in Patent Document 1 has been proposed as a composite fitting including a frame body and a shoji that connect a metal member such as an aluminum alloy and a resin member. This sliding window has a barrier-free structure installed on the boundary between the veranda of the apartment and the indoor side.
This sliding window accommodates the outer and inner shojis in the frame, and as a lower frame base member in the lower frame, an outdoor base member made of aluminum alloy or the like and an indoor base member are made of a heat insulating connecting member made of resin or the like. It is connected via. Then, the upper frame member for guiding the shoji to guide the shoji and the upper member for the inner shoji to guide the shoji are attached to the lower frame base member so that the load of the shoji is applied to the outdoor side base member, and the lower frame upper surface is flattened. Is formed.

The outdoor side base member and the indoor side base member are divided by a heat insulating connecting member made of resin as a bridge material, and the heat insulating connecting member and both base members are formed by bending both base members made of aluminum alloy by caulking or the like. Combined and assembled. The heat insulating connecting member, which is a bridge material, is formed continuously in the movable direction of the shoji.
In another conventional sliding window, the bridge member is continuously formed between an outer rail that guides the outer shoji and an inner rail that guides the inner shroud.

JP 2002-295133 A

However, in such a sliding window, if a fire or the like occurs in the vicinity, the resin bridge material is softened or melted, so that the lower frame may be separated inside and outside the bridge material.
In addition, the caulking process of the bridge member at the time of assembling the lower frame has a drawback that the aluminum shape member such as the outdoor side base member or the indoor side base member is partially bent, and thus the twist is likely to occur and the cost is increased. .
In addition, since the bridge material of the composite joinery as described above is made of resin, a gap is likely to occur due to heat shrinkage due to aging after construction and thermal factors such as fire, and therefore water stop treatment is necessary. It was.

  This invention is made in view of such a subject, Comprising: Without providing a bridge material in a lower frame, providing the composite fitting which improved indoor and outdoor heat insulation and airtightness. Objective.

A composite joinery according to the present invention is a composite joinery in which a shoji that can be opened and closed is housed in a frame, and the first rail that is provided in the lower frame of the frame and guides the shoji includes a base provided in the lower frame, and a shoji And a resin mediating member provided between the base portion and the rail portion.
According to the present invention, the first rail is separated into the base portion and the rail portion of the metal lower frame and connected by the resin mediating member provided therebetween to insulate, so that the heat insulation effect is high, and the mediation member is used as a shoji. Since the rail portion is separated from the lower frame by being provided in the movable direction, the rail can be prevented from freezing. Further, since no bridge material is provided on the lower frame, even if a fire or the like occurs, it is not separated, and water leakage or the like does not occur due to deterioration over time.

Moreover, it is preferable to provide the metal 2nd rail on the extension of the 1st rail.
By installing the first rail and the second rail on the same line, it is possible to enhance the heat insulation and ensure the strength of the rail.

Further, it is preferable that the shoji is located on the second rail and the first rail is located in a region without the shoji in a state where the shoji is closed.
Wind pressure resistance can be secured by positioning the shoji on the second rail when the shoji is closed.

The length of the second rail is preferably set longer than the length of the first rail.
In the closed state, the shoji is positioned on the second rail made of metal, and in the open state, the shoji is positioned on the first rail and part of the shoji is placed on the second rail so that the shoji The load can be shared.

Moreover, it is preferable that the door rail running surface of the first rail and the second rail be the same surface.
When the shoji moves between the first rail and the second rail, rattling can be suppressed because the door running surfaces of both rails are the same surface.

The composite fitting according to the present invention is a metal and resin composite fitting in which the inner and outer shojis are opened and closed in a frame body, and the metallic outer rail for guiding the outer shingles and the indoor side of the outer rail. An inner rail arranged to guide the shoji, the inner rail is provided with a first rail and a metal second rail on the extension of each other, and the first rail is provided on a lower frame separated from each other A resinous mediating member is provided between the base portion and the rail portion.
The composite joinery according to the present invention ensures the heat insulation between the lower frame and the rail portion by the intermediate member of the first rail of the inner rail, and since the bridge material is not provided on the lower frame, the lower frame is not separated inside and outside by heat. No water leaks occur. In the closed state, the wind-resistant performance can be secured by positioning the inner shoji on the second rail.

According to the composite joinery according to the present invention, the base portion of the lower frame and the rail portion are separated and insulated by the resin mediating member, thereby enhancing the heat insulation effect indoors and outdoors and preventing the rail portion from freezing.
Also, even if the intermediate member as a heat insulating material is softened or melted due to heat in a fire, the lower frame does not separate, and no caulking is required when installing the intermediate member, so the processing cost is low. The twist of the frame can be prevented.

It is a principal part longitudinal cross-sectional view by the side of the metal rail of the sliding window by embodiment of this invention. It is a principal part horizontal sectional view which shows the closed state of the sliding window shown in FIG. It is a principal part expanded sectional view which shows the hybrid rail side of the inner side rail in the rail arrangement structure provided in the lower frame. It is a principal part expanded sectional view which shows the metal rail side of the inner side rail in the rail arrangement | positioning structure provided in the lower frame. It is a principal part schematic diagram of the lower frame provided with the outer rail and the inner rail.

Hereinafter, a sliding window according to an embodiment of the present invention will be described with reference to the accompanying drawings.
A sliding window 1 as an example of a composite joinery according to an embodiment will be described with reference to FIGS. 1 to 5.
A sliding window 1 according to the embodiment shown in FIGS. 1 and 2 includes an inner frame 7 and an outer frame 8 in a frame 5 formed into a rectangular frame shape with an upper frame 2, a lower frame 3, and left and right vertical frames 4. Is in the prospective direction. The inner shoji 7 and the outer shoji 8 are each formed into a quadrangular frame shape with an upper eave 10 and a lower eave 11 and left and right vertical eaves 12 and 13, and a multi-layer glass 9 such as a pair glass is housed therein. .

In FIG. 1, the upper frame 2 is connected to the indoor side of the metal upper frame 2a provided on the outdoor side, and the lower frame 3 is connected to the indoor side of the metal lower frame 3a provided on the outdoor side. Are connected. Similarly, in the left and right vertical frames 4 shown in FIG. 2, the resin vertical frame 4b is connected to the indoor side of the metal vertical frame 4a provided on the outdoor side. The metal upper frame 2a, the metal lower frame 3a, and the metal vertical frame 4a are made of a metal such as an aluminum alloy.
In the lower frame 3 shown in FIG. 1, a metal outer rail 15 is formed on the outdoor side of the metal lower frame 3 a so that the door wheel 14 provided at the lower part of the outer shroud 8 runs. An inner rail 16 is installed at a position one step higher than the outer rail 15 on the indoor side of the metal lower frame 3a, and supports a door wheel 17 provided under the inner shoji 7 so as to be able to travel (see FIG. 4).

Further, in the shoji 7, the upper collar 10 has a resin upper collar 10b connected to the indoor side of the metal upper collar 10a provided on the outdoor side, and the lower collar 11 has a resin on the indoor side of the metal lower collar 11a provided on the outdoor side. The lower collar 11b is connected. Similarly, in the left and right vertical fences 12 and 13 shown in FIG. 2, the resin vertical fences 12b and 13b are connected to the indoor side of the metal vertical fences 12a and 13a provided on the outdoor side. The upper metal rod 10a, the lower metal rod 11a, and the vertical metal rods 12a and 13a are made of an aluminum alloy or the like. Further, in the shoji 8, the upper rod 10, the lower rod 11, the left and right vertical rods 12 and 13 have the same configuration. The description is omitted using the same reference numerals. Note that the downspout 12 is a spear on the door-end side, and the downspout 13 is a spear at the summoning section.
A door wheel 17 to be placed on the inner rail 16 is installed at the lower part of the metal lower arm 11a of the inner shoji 7, and a door wheel 14 to be placed on the outer rail 15 is also installed at the lower portion of the metal armor 11a of the outer shoji 8. ing.

In FIG. 1 thru | or FIG. 3, the spacer 21 is each interposed in the edge part of the four sides between the two glass panels 20 in the multi-layer glass 9 each supported by the inner shoddle 7 and the outer shoji 8. The side edges of the four sides of the multilayer glass 9 are continuously surrounded by a glazing channel 22 having a substantially U-shaped cross section over the entire circumference.
In the enlarged views shown in FIG. 3 and FIG. 4, the glazing channel 22 is formed by the glass receiving portion 26 provided on the metal upper rod 10 a, the metal lower rod 11 a, and the left and right metal vertical rods 12 a, 13 a in the inner and outer children 7 and 8. The side edges of the four sides are supported, and the indoor side of these metal cages is covered with a resin upper cage 10b, a resin lower cage 11b, and left and right resin longitudinal rods 12b and 13b, respectively.

3 and 4, each of the glazing channels 22 of the inner shroud 7 and the outer shroud 8 is formed by a base portion that abuts on the end surface of the multilayer glass 9 and a rising portion 22a that abuts on both side edges, respectively. 22a forms a fin portion 23 on the base side, a flat surface portion, and a tip fin portion 25 on the tip portion, and the other end portion of the tip fin portion 25 forms a protrusion 25a projecting to the opposite side.
Then, in the metal lower arm 11 a of the lower arm 11, both the indoor and outdoor rising portions 22 a are pressed by both side portions 26 a of a panel receiving portion 26 having a substantially U-shaped cross section provided so as to surround the glazing channel 22. As a result, the fins 23 and the tip fins 25 of the two rising portions 22a of the glazing channel 22 press both sides of the double glazing 9 indoors and outdoors to seal hermetically between the glazing channel 22 and both sides 26a. doing. Moreover, the resin lower collar 11b connected to the indoor side has the front projection 28 fitted between the tip of the side portion 26a of the panel receiving portion 26 and the projection 25a of the tip fin portion 25 to press the rising portion 22a. doing.

Such a configuration of the inner shoji 7 and the outer shoji 8 is the same not only in the lower collar 11 but also in the upper collar 10 and the left and right vertical collars 12 and 13. As a result, the double-glazed glass 9 of the inner and outer children 7 and 8 and the rising portion 22a of the glazing channel 22 are hermetically sealed by the side portion 26a outside the indoor portion of the panel receiving portion 26.
Moreover, in the inner shoji 7, the door pulley holding part 27 which hold | maintains the door wheel 17 is connected to the lower side of the panel receiving part 26 in the metal lower arm 11a. An anti-swaying portion 28 that protrudes downward is attached to a lower portion of the door pulley holding portion 27, for example, below the vertical rod 13 that is a summing portion. In the external shoji 8, a door pulley holding portion 30 that holds the door roller 14 is connected to the lower side of the support frame 29 that is further below the panel receiving portion 26 in the metal lower arm 11 a.

In the metal lower frame 3a, an inner rail 16 is provided, and for example, an upper step portion 33 having a planar shape and an outer rail 15 are provided, and a lower step portion 34 whose outdoor side is inclined downward is arranged vertically. The upper step portion 33 and the lower step portion 34 are connected to each other by a connecting portion 35. Furthermore, the outdoor side of the outer rail 15 is formed in a substantially U-shaped cross section toward the lower side, and the outdoor side end portion forms, for example, a screen door rail.
The outer rail 15 is made of a metal such as an aluminum alloy formed at the stepped corner of the outdoor side end of the lower step portion 34, and is formed integrally with the metal lower frame 3a. The outer rail 15 has a shape that protrudes upward from the lower step portion 34, for example, in a substantially arc shape in cross section.

Next, the rail structure in the metal lower frame 3a will be described with reference to FIGS.
The schematic diagram of FIG. 5 is a plan view of the main part of the metal lower frame 3a of the lower frame 3. The outer rail 15 is formed in the longitudinal direction on the outdoor side, and the inner rail 16 is formed on the indoor side. The inner rail 16 is divided into two in the longitudinal direction, a hybrid rail 38 to be described later is installed on one side, and a metal rail 39 made of, for example, an aluminum alloy is installed on the other side.
The hybrid rail 38 and the metal rail 39 constitute the inner rail 16 installed on the extension. The hybrid rail 38 and the metal rail 39 are formed at the same height, and the indoor-side finding surface M (see FIGS. 3 and 4) is formed in the same surface, and the door running surface is the same surface. In addition, when the inner shuffler 7 moves between the hybrid rail 38 and the metal rail 39, the steady rest 28 travels in contact with the indoor-side finding surface M of the hybrid rail 38 or the metal rail 39. Shaking can be prevented when moving between the rail 38 and the metal rail 39.
Moreover, the length of the central portion of the outer rail 15 in the longitudinal direction is L, and the hybrid rail 38 is set to a length shorter than that of the metal rail 39, and the partition portion is indicated by A. The ratio of the lengths of the hybrid rail 38 and the metal rail 39 can be set as appropriate, but the length of the metal rail 39 is set to such an extent that the vertical rod 13 which is the summing part of the inner shoji 7 is placed on the metal rail 39 in the closed state. It is preferable.

Next, the configuration of the hybrid rail 38 will be described with reference to FIG.
In the hybrid rail 38, a plurality of strips, for example, two strips of the inner wall plate 41 and the outer wall plate 42 are predetermined in the indoor / outdoor direction (expected direction) at a position facing the door wheel 17 from the planar upper step portion 33 in the metal lower frame 3a. It is formed at intervals. The inner side wall plate 41 on the indoor side has, for example, a substantially T shape in a sectional view, and the outer wall plate 42 on the outdoor side has, for example, a substantially stepped shape that is bent in a sectional view. The inner wall plate 41 and the outer wall plate 42 may be formed with drainage holes, respectively. The inner wall plate 41 and the outer wall plate 42 constitute a base portion 43 of the inner rail 16.
On the upper part of the inner wall plate 41 and the outer wall plate 42, a metal rail part 46 such as an aluminum alloy is installed on the upper part via a resin cover member 45 made of resin as a mediating member.

The resin cover member 45 is a substantially plate-like substrate extending in the prospective direction along the upper step portion 33 of the metal lower frame 3 a and is installed only in the region of the hybrid rail 38. The indoor side end 45a of the resin cover member 45 is curved upward and engages with the locking end 47 of the metal lower frame 3a. The outer end of the resin cover member 45 is mounted on the upper step 33 with two upper and lower plate portions connected to each other in a substantially quadrangular cross section, and the upper end of the resin cover member 45 can come into contact with the lower resin lid 11b of the external shoji 8 For example, a sealing material 48 such as an arcuate fin is attached.
In order to smoothly open and close the external shoji 8, it is preferable that the external shoji 8 and the sealing material 48 are not in contact with each other with a small gap. On the other hand, the sealing material 48 has a heat insulating effect, and when the surface of the metal lower frame 3a is seen from above through the gap with the outer shoji 8, there is a possibility of freezing in winter or the like. Therefore, it is preferable to cover the metal lower frame 3a so that it cannot be seen.
Further, the resin cover member 45 is engaged with the first locking portion 45b that is locked to the T-shaped head portion of the inner wall plate 41 on the lower surface of the intermediate portion in the indoor / outdoor direction and the second locking portion that is engaged with the bent portion of the outer wall plate 42. It has a locking part 45c.

The metal rail 46 is made of, for example, an aluminum alloy and has a mushroom cross section. The metal rail portion 46 includes a base 46a placed on the resin cover member 45 on the base portion 43, a support portion 46b extending upward from the base 46a, and a rail head portion having a substantially arcuate cross section provided on the support portion 46b. 46c is integrally formed. And the 1st engagement receiving part 50a provided in the support part 46b of the metal rail part 46 and the 2nd engagement receiving part 50b provided in the end of the rail head 46c are protrudingly formed in the opposite direction.
On the other hand, on the upper surface of the resin cover member 45 made of resin, a main engagement portion 51 that engages with the end portion of the base 46a of the rail portion 46 being sandwiched, and a first engagement receiving portion that extends substantially in an L shape. A first engagement portion 51a that locks 50a and a second engagement portion 51b that extends substantially in an L shape and locks the second engagement receiving portion 50b are integrally formed.
The engagement structure of the base portion 43, the resin cover member 45, and the rail portion 46 can have other appropriate configurations.

Accordingly, in the hybrid rail 38, the base portion 43 made of aluminum alloy and the rail portion 46, which are integrally formed with the metal lower frame 3a, are separately formed, and the base portion 43 and the rail portion 46 are separated by the resin cover member 45 made of resin. They are connected and fixed to each other.
Therefore, in the hybrid rail 38, the base portion 43 and the rail portion 46 formed on the metal lower frame 3a are thermally insulated in the vertical direction by the resin cover member 45 made of resin. And even if the lower frame 3 receives heat due to a fire or the like and the resin cover member 45 is softened or melted, the metal lower frame 3a is not separated. In addition, since the metal lower frame 3a is not divided in the indoor and outdoor directions, heat insulation in this direction is not performed, but since the indoor side is surrounded by the resin lower frame 3b and the resin cover member 45, high heat insulation is exhibited indoors and outdoors. it can.

Next, the configuration of the metal rail 39 will be described with reference to FIG.
Similar to the hybrid rail 38, the metal rail 39 is formed with an inner wall plate 41 and an outer wall plate 42 on the upper step portion 33 with a predetermined interval in the indoor / outdoor direction. The head rail 55 connected to the upper portions of the inner wall plate 41 and the outer wall plate 42 includes a rail receiving portion 55a for seating the door wheel 17 and a lid portion 55b for seating on the inner wall plate 41 and the outer wall plate 42, for example. A long leg portion 55c and a short leg portion 55d extending downward are formed in the lower portion of the lid portion 55b.
The length of the long leg portion 55c and the short leg portion 55d extending below the lid portion 55b is different. In a state where the lid portion 55b of the head rail 55 is seated on the outer wall plate 42 and the inner wall plate 41, the long leg portion 55c has a convex portion that engages with the bent concave portion of the outer wall plate 42 at the lower end, and the short leg portion 55d. Has a bent shape that engages with a T-shaped head formed at the upper end of the inner wall plate 41.
Then, by fitting the long leg portion 55 c and the short leg portion 55 d of the head rail 55 to the outer wall plate 42 and the inner wall plate 41, the metal rail 39 can be integrated.

In the inner rail 16 shown in FIG. 5, at the dividing portion 40 that forms the boundary between the hybrid rail 38 and the metal rail 39, the rail head portion 46 c of the hybrid rail 38 and the resin cover member 45 and the head rail 55 of the metal rail 39 are used. And is divided. The base portion 43 including the inner wall plate 41 and the outer wall plate 42 is integrally formed over the entire length, but can be separated by the dividing portion 40.
The dividing portion 40 between the hybrid rail 38 and the metal rail 39 may be integrated by filling the gap between the rail head portion 46c and the resin cover member 45 and the head rail 55 with resin. Alternatively, the dividing portion 40 may be connected and integrated by embedding or filling various metals such as aluminum. Alternatively, the rail head portion 46c and the resin cover member 45 and the head rail 55 may be brought into contact with each other and separated from each other. In the inner rail 16, the metal rail 39 is stronger than the hybrid rail 38.

  As shown in FIG. 5, in the sliding window 1, the length in the direction of finding (opening / closing direction) of the inner and outer obstacles 7 and 8 is larger than half the total length of the outer rail 15 and the inner rail 16. good. Then, with the inner shroud 7 and the outer shroud 8 of the sliding window 1 closed, the inner shroud 7 is positioned on the metal rail 39 of the inner rail 16, and the outer shroud 8 is positioned on the outdoor side in the prospective direction of the hybrid rail 38. To do. In the example shown in FIG. 5, the closed inner shroud 7 is not on the hybrid rail 38, but a part may be located on the hybrid rail 38. In the open state of the inner impeller 7, the inner impeller 7 is positioned on the hybrid rail 38, but a part of the inner impeller 7 is positioned on the metal rail 39, thereby reducing the load burden of the inner impeller 7 on the hybrid rail 38. .

  As described above, since the sliding window 1 according to the present embodiment has the above-described configuration, the hybrid rail 38 has the base portion 43 and the rail portion 46 formed on the metal lower frame 3a by the resin cover member 45 made of resin. Since it is insulated in the vertical direction, high heat insulation can be exhibited. Even if the sliding window 1 receives heat such as a fire and the resin cover member 45 of the inner rail 16 of the lower frame 3 is softened or melted, the metal lower frame 3a is not separated. Moreover, since the lower frame 3 is surrounded by the resin lower frame 3b and the resin cover member 45 on the indoor side of the metal lower frame 3a, it can exhibit high heat insulation indoors and outdoors.

In addition, since the inner rail 16 is divided into the hybrid rail 38 and the metal rail 39, the heat insulation effect is high also in this respect, and the heat insulation effect by the resin cover member 45 is taken into consideration and the freezing of the hybrid rail 38 can be prevented. In addition, the hybrid rail 38 of the inner rail 16 and the metal rail 39 have the same traveling surface as the door running surface, and the steadying portion 28 provided on the inner shoji 7 abuts against the indoor-side finding surface M of the hybrid rail 38 or the metal rail 39. Therefore, the movement is smooth because of movement, and rattling can be suppressed when the hybrid rail 38 and the metal rail 39 are moved.
In addition, since the metal lower frame 3a is not provided with a bridge, water leakage due to heat shrinkage or aging deterioration does not occur, and since the caulking process is unnecessary, the metal lower frame 3a is not twisted, and the processing cost is low. Become.

In addition, the sliding window 1 is configured so that the inner shroud 7 is connected to the inner rail 16 even if strong wind is blown from the outdoor side to the indoor side or in the opposite direction in a state where the inner shingles 7 and the outer shingles 8 are closed in the frame 5. Since it is located on the metal rail 39, it is possible to exhibit a wind pressure resistance characteristic for receiving the wind pressure.
Moreover, even when the inner shingles 7 are opened, most of the inner shingles 7 are located on the hybrid rails 38, but some are located on the high-strength metal rails 39, so a part of the load on the inner shingles 7 is reduced. It can be received by the metal rail 39 and the load burden on the hybrid rail 38 can be reduced.

In addition, the composite joinery by this invention is not limited to the sliding window 1 by embodiment mentioned above, In the range which does not deviate from the summary of this invention, a suitable change, substitution, etc. are possible.
Hereinafter, modifications of the present invention will be described, but the same or similar components or members described in the above-described embodiment will be described using the same reference numerals.

  For example, in the sliding window 1 according to the above-described embodiment, the metal rail 39 is set longer than the hybrid rail 38 for the inner rail 16, but the same length or the hybrid rail 38 may be set longer. In this case, a stopper may be installed at the end of the hybrid rail 38 on the vertical frame 4 side so that the open inner limb 7 is positioned on the hybrid rail 38 and a part thereof is positioned on the metal rail 39. Even in the closed state, the inner impeller 7 may be located on the metal rail 39 and a part thereof may be located on the hybrid rail 38. Even in this case, wind resistance characteristics can be secured.

In the present invention, the hybrid rail 38 of the inner rail 16 is included in the first rail, and the metal rail 39 is included in the second rail.
Further, in the above-described embodiment, the sliding window 1 provided with the inner shoji 7 and the outer shoji 8 has been described, but the present invention is not limited to this, and the inner rail 16 can be installed by applying to a single sliding window or the like. .

DESCRIPTION OF SYMBOLS 1 Sliding window 3 Lower frame 3a Metal lower frame 3b Resin lower frame 4 Vertical frame 4a Metal vertical frame 4b Resin vertical frame 5 Frame 7 Inner child 8 Outer child 15 Outer rail 16 Inner rail 38 Hybrid rail 39 Metal rail 43 Base 45 Resin cover member 46 Rail part
46c Rail head 55 Head rail

Claims (6)

A composite joinery with a shoji that can be opened and closed inside the frame,
The first rail that is provided on the lower frame of the frame and guides the shoji,
A base provided on the lower frame;
A rail portion for guiding the shoji,
A composite joinery comprising a resin-made intermediary member provided between the base portion and the rail portion.   The composite joinery according to claim 1, wherein a second rail made of metal is provided on an extension of the first rail.   3. The composite joinery according to claim 2, wherein the shoji is located on the second rail and the first rail is located in an area without the shoji in a state where the shoji is closed.   The composite joinery according to claim 2 or 3, wherein a length of the second rail is set longer than a length of the first rail.   The composite joinery described in any one of Claim 2 to 4 which makes the door-wheel running surface of said 1st rail and said 2nd rail the same surface. A metal / resin composite fitting in which an inner and outer shoji can be opened and closed in a frame,
A metal outer rail that guides the shoji,
An inner rail that is arranged on the indoor side of the outer rail and guides the shoji,
The inner rail includes a first rail and a metal second rail on each other's extension,
The first fitting includes a resin intermediate member between a base portion and a rail portion provided on a lower frame of the frame body separated from each other.

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