JPH09228748A - Multilayered glass type shoji (japanese typical sliding door), rotary window and slide window - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a surface member flush with a multilayered glass part by retaining the multilayered glass part formed of long glass plate and short glass plate by means of a retaining frame, adhering a lining member to the glass part with a structural seal, and structurally locking the front surface member to the lining member. SOLUTION: A multilayered glass part 1 formed of long and short glass plates 4a, 4b is retained by a retainer frame 6a. In the part 1, a spacer 2 is interposed between both the plates 4a, 4b to from an air layer 101. The frame 6a is formed of a lining member 7a and a front surface member 8a, and the lining member 7a is adhered to the part 1 with a structural seal 9a. The surface member 8a is locked to the lining member 7a, the surface protection part for the member 8a and the short glass plate 4b are made to be flush with each other, and an end retaining part of the surface member 8a is arranged at an end face of the long glass plate 4a. Accordingly it is possible to give a frameless glass wall feeling and improve the design.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-layer glass screen, a rotating window and a sliding window.

[0002]

2. Description of the Related Art As a method for glazing a double glazing, a method in which the double glazing is swung in a frame and fixed with a glazing channel or a sealing material is generally used.

FIG. 18 is an example of the former, in which a multi-layer glass 71 is fixed to a frame 72 by a glazing channel 73. FIG. 19 is an example of the latter, in which the double-layered glass 71 is supported on the frame 72 by the backup materials 74, 74 on both side surfaces thereof, and the outside of the backup materials 74, 74 is sealed by the sealing material 75,
It is sealed at 75.

In these conventional examples, since a surface clearance and an edge clearance are required between the frame 72 and the double glazing 71, and the frame 72 is required to have a member strength, the frame 7
The two found dimensions M1 and M2 and the estimated dimensions L1 and L2 are large, and there is a problem that the price is high and the cost is large.

There is a concern that the glazing channel 73 may contract in the long-term use of the conventional example shown in FIG. 18, and the seal material 75 may be broken in the long-term use of the conventional example shown in FIG.

The frame 72 projects from the glass surface of the multi-layered glass 71 and does not have a frameless feeling, so the feeling of the glass wall surface is insufficient and the design is poor. Since many metal materials such as aluminum alloys are used for the frame 72, and the found dimensions M1 and M2 and the estimated dimensions L1 and L2 of the frame 72 are large, the heat insulating property is not sufficient in such a case. It was

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a frameless feeling, is excellent in designability, retains necessary strength, and is also excellent in heat insulating property at a low price. The purpose of the present invention is to provide a multi-layer glass shoji, and a rotating window and a sliding window using the same.

[0008]

According to the present invention, a holding frame which is not exposed from the glass plate surface of the double glazing and has a flat appearance is attached to the periphery of the double glazing. As a result, the holding frame has an excellent appearance. Further, if a cover as a surface member is provided so that the outside of the holding frame is made of a resin material, the heat insulating property is improved and the dew condensation at the glass edge is reduced.

That is, according to the present invention, in a multi-layer glass shoji in which the multi-layer glass is attached to the holding frame, the multi-layer glass has a spacer in which a short glass plate and a long glass plate are arranged in the periphery thereof. An air layer is formed by interposing the long plate glass on the outer side of the spacer so as to have a protruding plate glass portion with respect to the short plate glass, and the holding frame is flush with the short plate glass. The surface protection part formed as described above, the end protection part which is adhered to the first end face formed in a row in the end face of the long slab glass, and which is formed in the direction perpendicular to the surface protection part, and the double glazing. Provided is a multi-layer glass shoji characterized by having a holding portion for holding the same.

The holding portion is attached to a surface holding portion that is adhered to the inner surface of the protruding plate glass, which is the holding frame side of the protruding plate glass portion, and to a second end surface that is continuous with the end surface of the short plate glass and that is formed on the outer side of the spacer. It is preferable that the surface holding portion has an end holding portion formed in the vertical direction.

The holding frame is composed of a back member and a surface member, and the back member has the surface holding portion, the end holding portion, and a locking portion, and the surface member is the surface protecting member. A part, the end protection part, and a locking part having a shape corresponding to the shape of the locking part of the back surface member.

The holding frame may include a back member and a front member, and the front member may be integrally molded with the back member.

A rotating window in which the multi-layer glass screen is attached to an outer frame by an opening / closing metal fitting, wherein the opening / closing fitting is:
It has an outer frame side mounting part, a shoji side mounting part, and an arm part that can rotate with respect to the outer frame side mounting part and the shoji side mounting part, and the outer side mounting part is fixed to the outer frame with a fastening material. A sliding window is provided, and the shoji-side mounting portion is fastened to the multi-layer glass shoji by a fastening material.

The holding frame comprises a back member and a surface member, and the back member has the surface holding portion, the end holding portion, the surface protecting portion, and the groove forming portion, The member may have the edge protection portion and a groove forming portion having a shape corresponding to the shape of the groove forming portion of the back surface member.

Further, there is provided a sliding window in which the multi-layer glass screen is fitted in a window frame, the slide frame having a projection corresponding to a groove forming portion of the multi-layer glass screen.

The multi-layer glass is one short glass plate,
Subsequently, two long glass sheets are interposed between the spacers arranged in the periphery of the long glass sheet and on the outer side of the spacer sandwiched by the short glass sheet and the long glass sheet arranged in the center. The long sheet glass may be arranged so as to have a protruding sheet glass portion with respect to the short sheet glass to form an air layer.

The multi-layer glass is composed of two short glass sheets,
Subsequently, one long plate glass is interposed between the spacers arranged in the periphery thereof and on the outer side of the spacer sandwiched by the long plate glass and the short plate glass arranged in the center. The long sheet glass may be arranged so as to have a protruding sheet glass portion with respect to the short sheet glass to form an air layer.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION First, an outline of a double-layer glass shoji of the present invention will be described, and a rotating window and a sliding window will be described later.

"Outline of double-layer glass shoji" Fig. 1, 7, 9,
12, 16 and 17 are the first of the multi-layer glass shoji of the present invention,
It is an important section sectional view of an example of 2, 3, 4, 5, and 6.

In these examples, double glazing 1
Further, the holding frames 6a, 6b, 6c, 6d, 6e, 6f are attached by structural seals 9a, 9b as a sealing material having an adhesive function. Structural seal 9a and structural seal 9b
The back-up material 10 is used between and.

The multi-layer glass 1 is composed of short glass plates 4b and 4d.
And long glass sheets 4a and 4c are arranged with a spacer 2 disposed in the peripheral portion therebetween to form an air layer, and a butyl rubber layer is formed on the boundary surface between the side surface of the spacer 2 and the main surface of the glass sheet. Next seal (not shown) is applied,
A secondary seal 3 is provided on the glass plate edge side of the spacer 2, and the long glass plates 4a and 4c are short glass plates 4b and 4d on the outer side of the secondary seal 3 on the outer side of the spacer 2.
Are arranged to have protruding glass pane portions 5, 85.

The double glazing 1 has the protruding glazing portions 5, 85 by the long glazings 4a, 4c. To put it the other way around, the short glazings 4b, 4d and the long glazing 4 are shown.
a and 4c, and the spacer 2 sandwiched by these, are formed to have stepped notches,
The main portion of the holding frame is attached to the stepped notch by structural seals 9a and 9b.

Holding frames 6a, 6b, 6c, 6d, 6e, 6
f is a structural seal 9a on the surface protection portion 27 formed so as to be flush with the short glass plates 4b and 4d, and the first end surface 12 formed so as to be continuous with the end faces of the long glass plates 4a and 4c.
It has an edge protection part 26 which is adhered to the surface protection part 27 in a vertical direction and a holding part 20 which is adhered to the double glazing 1 by structural seals 9a and 9b.

The holding portion 20 is a first L-shaped portion,
Protruding plate glass parts 5, 8 formed by the long plate glass 4a, 4c
5, inner surface 13, 83 of the protruding plate glass portion on the side of the holding frame
Surface holding portion 21 adhered to the surface by a structural seal 9a
And a second end face 11 formed continuously with the end faces of the short glass plates 4b and 4d and outside the secondary seal 3, which is the outer side of the spacer 2, and is adhered by a structural seal 9b. The surface holding part 21 has an end holding part 22 formed in the vertical direction.

The back members 7a, 7b, 7d, 7e, 7f and the holding frame 6c are made of metal such as aluminum alloy, and the surface members 8a, 8b, 8d, 8e, 8f are made of vinyl chloride resin. The synthetic resin can be used. The holding frames 6b, 6d, 6e and 6f are integrally formed of aluminum alloy, vinyl chloride resin or the like.

As the secondary seal 3 and the structural seals 9a and 9b, a silicone sealant or a polysulfide sealant can be used. The inside of the spacer 2 is filled with a desiccant.

Normally, the long plate glass 4e, 4c side which is frameless and has a glass wall feeling is used as the outdoor side, and the short plate glass 4b, 4d side is used as the indoor side.

[First Embodiment of Multi-layered Glass Shoji] A first embodiment of the multi-layered glass shoji of the present invention will be described with reference to FIGS. 1, 2 and 3. The double glazing 1 is held by the holding frame 6a to form a double glazing 30a. The multi-layer glass 1 includes one long plate glass 4a and one short plate glass 4
It is formed using b. The same applies to the second, third, and fourth embodiments of the double-glazing shoji screen. Holding frame 6
“A” includes a back member 7a and a front member 8a.

The back member 7a is formed in a direction perpendicular to the surface holding portion 21 by being bonded to the inner surface 13 of the protruding plate glass by the structural seal 9a and the second end surface 11 by the structural seal 9b. End holding portion 22
And a second L-shaped portion 23 and locking portions 24a and 24c. The holding portion 20 and the second L-shaped portion 23 form a substantially square V-shaped cross section 102.

The second L-shaped portion 23 is composed of a rising portion 103 formed in parallel with the surface holding portion 21 and a horizontal portion 104 formed in parallel with the end holding portion 22.

The locking portion 24a has hooks 25a and 25b formed inward with respect to each other, and the hook 25a is the surface holding portion 2.
The hook 25b is formed at the end of the first L-shaped portion 2
It is formed so as to rise from the corner portion of 3. The locking portion 24c includes a rising portion 103 and a hook 25c formed in parallel with the surface holding portion 21.

The surface member 8a is adhered to the surface protection portion 27 formed so as to be flush with the short glass plate 4b and the first end surface 12 formed so as to be continuous with the end face of the long glass plate 4a. The end protection portion 26 formed in the vertical direction on the surface protection portion 27, the locking portion 24d having a shape corresponding to the shape of the locking portion 24a of the back surface member 7a, and the locking portion 24 of the back surface member 7a.
It has a locking portion 24f having a shape corresponding to the shape of c.

The locking portion 24d has hooks 25e and 25d formed outwardly with respect to each other, and these are formed on the inner surface side of the end protection portion 26 in a substantially vertical direction. Therefore, the hooks 25a and 25b formed by the hooks 24a are not attached to the hooks 24
An engaging portion 24f for engaging the end protection portion 26 of the surface member 8a with the back member 7a such that the hooks 25d and 25e formed by d are fitted is provided in the surface protection portion 27 and the surface protection portion 27. And a hook 25f having an L-shaped cross section. Therefore, the hook 25c formed by the engaging portion 24c and the hook 25f formed by the engaging portion 24f
While hooking inwardly toward each other, the hook 25c is the surface protection portion 2
7 is engaged with the hook 25f, and the hook 25f is engaged with the rising portion 103 by the hook 25c.

Since the surface protection portion 27 is formed so as to be flush with the short glass plate 4b, the short glass plate outer surface 15 is formed.
The outer surface of the surface member 8a forming the holding frame 6a forms the same surface.

As shown in FIG. 3, 4 of the short plate glass 4b
Long plate glass 4a having protruding plate glass portions with respect to sides
The multi-layer glass 1 is formed by using, and the holding frame 6a is attached to the multi-layer glass 1 to form the multi-layer glass shoji 30a.

It is possible to form a double glazing by using the long slab glass 4a having the protruding slab glass portion with respect to the two sides of the short slab glass 4b, but in that case, the side without the protruding slab glass portion is As described with reference to FIGS. 18 and 19, since it is necessary to hold the double glazing by the frame material having a large found size or a prospective size, the heat insulating property is deteriorated, which is not preferable.

[First Embodiment of Rotating Window] FIGS. 4 and 5 explain the first embodiment of the rotating window of the present invention with reference to FIG. The multi-layer glass shoji 30a is attached to the outer frame 35 by an opening / closing metal fitting 36. The opening / closing hardware 36 and the outer frame 35 are made of metal such as aluminum alloy. The opening / closing hardware 36 includes an outer frame side attachment portion (abbreviated as an attachment portion in FIG. 5) 37a, a shoji side attachment portion 37b, and an arm portion 38.

The outer frame side attachment portion 37a is fixed to the outer frame 35 by a fixing screw 39 as a fastening material, and the shoji side attachment portion 37b is fixed by a fixing screw 39 as a fastening material. It is attached to 30a.

Since the arm portion 37 is rotatable with respect to the outer frame side mounting portion 37a and the shoji side mounting portion 37b, the multi-layer glass shoji 30a is rotatable with respect to the outer frame 35. Has become. Although omitted in FIGS. 4 and 5, as shown in FIG. 6, an airtight member 40 is provided on the outer frame 35 so that the airtightness is improved when the rotating window is closed.

[Second Embodiment of Multi-layered Glass Shoji] A second embodiment of the multi-layered glass shoji of the present invention will be described with reference to FIGS. The double glazing 1 is held by the holding frame 6b to form a double glazing 30b. The holding frame 6b is formed by integrally molding a back member 7b and a front member 8b.

The back member 7b is formed on the inner surface 13 of the protruding sheet glass by the structural seal 9a and the second end surface 11 by the structural seal 9b. End holding portion 22
And a second L-shaped portion 45, and has a substantially square cross section. The surface holding portion 21 and the end holding portion 22 make the first L
A holding portion 20 forming a character portion is configured.

The surface member 8b is integrally formed with the back member 7b, and is formed so as to be continuous with the surface protection portion 27 formed so as to be flush with the short glass plate 4b and the end face of the long glass plate 4a. It has an end protection portion 26 that is adhered to the first end surface 12 and that is formed in a vertical direction on the surface protection portion 27. The surface protection portion 27 and the end protection portion 26 are the second L-shaped portion 45.
It is integrally molded in contact with.

[Third Embodiment of Multi-layered Glass Shoji] A third embodiment of the multi-layered glass shoji of the present invention will be described with reference to FIGS. 9 and 10. The multi-layer glass 1 is held by the holding frame 6c to form the multi-layer glass shoji 30c.

The holding frame 6c is formed in a direction perpendicular to the surface holding portion 21 by being bonded to the inner surface 13 of the protruding plate glass by the structural seal 9a and by being bonded to the second end surface 11 by the structural seal 9b. End holding portion 22
A surface protection part 27 formed so as to be flush with the short glass plate 4b, and a first end surface 12 formed so as to be continuous with the end surface of the long glass plate 4a. End protection portion 26 formed in the direction. The holding portion 20 is constituted by the surface holding portion 21 and the end holding portion 22, and the holding portion 20, the surface protecting portion 27, and the end protecting portion 26 form a cross-section of a substantially six-character shape.

[Second Embodiment of Rotating Window] Referring to FIG. 11, a rotating window using the double glazing shown in FIG. 9 will be described. The multi-layer glass shoji 30c is attached to the outer frame 35 by an opening / closing hardware 36. The opening / closing hardware 36 and the outer frame 35 are made of metal such as aluminum alloy.

[Fourth Embodiment of Double-glazing Shoji] FIG. 12,
With reference to FIG. 13, a fourth embodiment of the double glazing screen of the present invention will be described. The double glazing 1 is held by the holding frame 6d to form a double glazing 30d. The holding frame 6d is formed by integrally molding a back member 7d and a front member 8d.

The backing member 7d is formed in a vertical direction on the surface holding portion 21 by being bonded to the inner surface 13 of the protruding plate glass by the structural seal 9a and by being bonded to the second end surface 11 by the structural seal 9b. End holding portion 22
And a horizontal T-shaped portion 106 that stands up from the end of the end holding portion 22, and has a cross-section of a substantially six-letter shape.

The surface holding portion 21 and the end holding portion 22 make the first
A holding portion 20 forming an L-shaped portion is formed. The horizontal T-shaped portion 106 includes a surface protection portion 27 and a support portion 105 that extends laterally from a substantially central portion of the surface protection portion 27, and a second L-shaped portion is provided below the horizontal T-shaped portion 106. 55, the groove forming portion 54 is formed above. Holding part 20 and second L-shaped part 5
5 has a substantially square cross section.

Reference numeral 51 is a pull tab provided at the door end of the double-glazed shoji screen. No pull tabs 51 are provided on the upper and lower parts of the shoji screen or the meeting part.

The surface member 8d is integrally molded with the back member 7d, and has an end protection portion adhered to the first end surface 12,
Groove forming portion 5 having a shape corresponding to the shape of the groove forming portion 54.
3 and the airtight material holding portion 5 formed inside the groove forming portion 53
And 2. The groove forming portion 53 has a substantially U-shaped cross section, a bottom portion thereof is formed in contact with the support portion 105, an outer rising portion thereof is formed in contact with the surface protection portion 27, and an inner rising portion thereof is structured. It is adhered to the inner surface 13 of the protruding plate glass by the seal 9a. Airtight material holding part 5
An airtight material 50 is attached to 2.

[First Embodiment of Sliding Window] FIGS. 14 and 1
5, the sliding window using the double-glazing shoji of FIG. 12 will be described. Multi-layered glass screen 30d, 30d on the window frame 60
Is fitted. A projection 61 corresponding to the groove forming portion 53 of the double-layered glass screen 30d is provided on the window frame 60.

[Fifth Embodiment of Double-Layered Glass Shoji] A fifth embodiment of the double-layered glass shoji of the present invention will be described with reference to FIG. The double glazing 1 is held by the holding frame 6e to form the double glazing 30e.

The double glazing 1 is one short glass plate 4
b, followed by two long glass plates 4c, 4a, with each spacer 2, 2 arranged in the periphery thereof interposed, and a short glass plate 4b and a long glass plate 4 arranged in the center.
The long glass sheet 4c is arranged on the outer side of the spacer 2 sandwiched by the c and the c glass sheet so as to have a protruding glass sheet portion 83 with respect to the short glass sheet 4b.

The holding frame 6e includes a back member 7e and a front member 8e.
And are integrally molded, but the other points are the same as those described in the "second embodiment of the double glazing screen".

[Sixth Embodiment of Double-Glass Shoji] A sixth embodiment of the double-glazing shoji of the present invention will be described with reference to FIG. The multi-layer glass 1 is held by the holding frame 6f to form the multi-layer glass shoji 30f.

The double glazing 1 is composed of two short glass plates 4
b, 4d, and then one long plate glass 4a, with the spacers 2, 2 arranged in the periphery thereof interposed, and the long plate glass 4a and the short plate glass 4 arranged in the center.
The long glass sheet 4a is arranged on the outer side of the spacer 2 that is sandwiched by d and so as to have a protruding glass sheet portion 83 with respect to the short glass sheet 4d.

The holding frame 6f includes a back member 7f and a front member 8f.
And are integrally molded, but the other points are the same as those described in the "second embodiment of the double glazing screen".

[0058]

EFFECTS OF THE INVENTION With the above structure of the present invention, a low-priced multi-layer structure which is frameless, has a feeling of glass wall surfaces, is excellent in design, retains the required strength required for shoji screens, and is excellent in heat insulation. We can provide glass shoji. Further, since the holding frame is not so large, the weight saving effect is great. Further, the same effect as described above can be obtained for the rotating window and the sliding window using the same.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a first embodiment of a double-glazing shoji according to the present invention.

FIG. 2 is an explanatory view of a holding frame used in the embodiment of FIG. 1, (a) is a cross-sectional view of a back member which is a component of the holding frame,
(B) is sectional drawing of the surface member which is a component of a holding frame, (c)
FIG. 3 is a sectional view of a holding frame assembled by a back member and a front member.

FIG. 3 is an explanatory view of the double-glazing shoji of FIG.
(A) is a front view of a double glazing screen, (b) is a right side view of a double glazing, and (c) is a front view of a double glazing.

4 is a perspective view of a rotating window using the double-glazing shoji of FIG.

5 is an exploded perspective view illustrating the configuration of the rotating window of FIG.

FIG. 6 is a cross-sectional view of a main part of the rotating window of FIG.

FIG. 7 is a cross-sectional view of the essential parts of a second embodiment of the double-layer glass shoji according to the present invention.

8 is an explanatory view of a holding frame used in the embodiment of FIG. 7, (a) is a cross-sectional view of a back member which is a part of the holding frame,
(B) is sectional drawing of the surface member which is a component of a holding frame, (c)
FIG. 3 is a sectional view of a holding frame assembled by a back member and a front member.

FIG. 9 is a cross-sectional view of an essential part of a third embodiment of the double-layer glass shoji according to the present invention.

10 is a sectional view of a holding frame used in the embodiment of FIG.

11 is a cross-sectional view of a main part of a rotating window using the double-glazing shoji of FIG.

FIG. 12 is a cross-sectional view of an essential part of a fourth embodiment of the double-layer glass shoji according to the present invention.

13 is an explanatory view of a holding frame used in the embodiment of FIG. 12, (a) is a cross-sectional view of a back member which is a part of the holding frame,
(B) is sectional drawing of the surface member which is a component of a holding frame, (c)
FIG. 3 is a sectional view of a holding frame assembled by a back member and a front member.

FIG. 14 is a front view of a double-sided window using the double-layered glass screen of FIG.

FIG. 15 is a cross-sectional view of main parts taken along the line AA of the double-opening window in FIG.

FIG. 16 is a cross-sectional view of a main part of a fifth embodiment of the double-glazing shoji according to the present invention.

FIG. 17 is a cross-sectional view of an essential part of a sixth embodiment of the double-glazing shoji according to the present invention.

FIG. 18 is a cross-sectional view of an essential part of a double-layer glass shoji according to a first conventional example.

FIG. 19 is a cross-sectional view of a main part of a double-layer glass shoji according to a second conventional example.

[Explanation of symbols]

 1: Multi-layer glass 2: Spacer 3: Secondary seal 4a, 4c: Long plate glass 4b, 4d: Short plate glass 5,85: Protruding plate glass portion 6a, 6b, 6c, 6d, 6e, 6f: Holding frame 7a, 7b, 7d, 7e, 7f: Back member 8a, 8b, 8d, 8e, 8f: Surface member 11: Second end face 12: First end face 20: Holding part 21: Face holding part 22: End holding part 26: End protection Part 27: Surface protection part 35: Opening / closing hardware 36: Outer frame 37a: Outer frame side mounting part 37b: Shoji side mounting part 38: Arm part 53, 54: Groove forming part 60: Window frame 61: Protrusion

Claims (9)

[Claims] 1. A multi-layer glass shoji in which a multi-layer glass is attached to a holding frame, wherein the multi-layer glass has a short plate glass and a long plate glass interposed between spacers, and An air layer is formed by arranging a long plate glass on the outer side of the spacer so as to have a protruding plate glass portion with respect to a short plate glass, and a holding frame is a surface formed so as to be flush with the short plate glass. A protection part and an end protection part which is adhered to a first end face formed continuously with the end face of the long plate glass and which is formed in a vertical direction to the face protection part;
A double glazing screen having a holding part for holding a double glazing. 2. The holding portion of the holding frame is formed on the surface holding portion that is adhered to the inner surface of the protruding plate glass, which is the holding frame side of the protruding plate glass portion, and on the outer side of the spacer that is continuous with the end surface of the short plate glass. The double-layered glass shoji according to claim 1, further comprising an end holding portion which is adhered to the second end surface and which is formed in a vertical direction on the surface holding portion. 3. The holding frame comprises a back member and a surface member, the back member has the surface holding portion, the end holding portion, and a locking portion, and the surface member is the The double-glazing device according to claim 2, further comprising a surface protection part, the end protection part, and a locking part having a shape corresponding to the shape of the locking part of the back surface member. 4. The multi-layer glass shoji according to claim 1, wherein the holding frame comprises a back member and a front member, and the front member is integrally molded with the back member. 5. The holding frame comprises a back member and a surface member, and the back member has the surface holding portion, the end holding portion, the surface protecting portion, and a groove forming portion. The double-sided glass shoji according to claim 2, wherein the front surface member has the edge protection portion and a groove forming portion having a shape corresponding to the shape of the groove forming portion of the back surface member. 6. The double glazing comprises one short glass plate and two long glass plates with respective spacers arranged in the periphery thereof, and at the center of the short glass plate. The air layer is formed by arranging the long glass plate so as to have a protruding glass plate portion with respect to the short glass plate on the outer side of the spacer sandwiched by the arranged long glass plates. 3, 4 or 5 double glazing. 7. The double glazing comprises two short glass plates and one long glass plate with spacers arranged in the periphery thereof and at the center of the long glass plate. The air layer is formed by arranging the long glass plate so as to have a protruding glass plate portion with respect to the short glass plate on the outer side of the spacer sandwiched by the arranged short glass plates. 3, 4, 5 or 6 double glazing. 8. A rotating window in which the multi-layer glass shoji according to claim 1, 2, 3 or 4 is attached to an outer frame by an opening / closing metal fitting, wherein the opening / closing fitting is an outer frame side mounting portion and a shoji side mounting portion. And an outer frame side mounting portion and an arm portion rotatable with respect to the shoji side mounting portion, the outer side mounting portion is fixed to the outer frame with a fastening material, and the shoji side mounting portion is a double-layer glass. A rotating window that is fastened to a shoji screen with a fastening material. 9. A sliding window in which the multi-layer glass screen of claim 5 is fitted in a window frame, wherein the window frame has a protrusion corresponding to a groove forming portion of the multi-layer glass screen. Sliding window.