sash

Abstract

To provide a sash with improved thermal insulation properties.SOLUTION: A sash 100 includes: a rectangular outer frame 1; a paper sliding door S fitted inside the ring of the outer frame 1; and a stile insulation 7 placed closer to the room than the paper sliding door S in the depth direction of the outer frame 1. The paper sliding door S has a pair of face materials 25, 35 and a pair of stiles 20, 30 fixed to the perimeter of the face materials 25, 35. The stile insulation 7 is placed overlapping with stiles 20, 30 in the depth direction of the outer frame 1.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a sash.

Background Art

[0002] Patent Document 1 describes a fitting. This fitting is composed of a window frame, a fixed shoji and a movable shoji attached to the window frame. In this fitting, in order to improve the airtightness of the entire sliding window, an airtight means, a strip piece, is interposed between a specific wall in either the outer shoji storage frame portion or the inner shoji storage frame portion of the window frame where the fixed shoji is attached and specific walls in the upper frame, lower frame and door end frame of the fixed shoji.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a sliding sash, heat loss from the window frame, the rail portion of the shoji, and the frame of the shoji is still large, and there is room for further improvement.

[0005] The present invention has been made in view of such a situation, and an object thereof is to provide a sash with improved heat insulation properties.

Means for Solving the Problems

[0006] The sash according to the present invention for achieving the above object is a rectangular window frame, a shoji fitted inside the loop of the window frame, and a heat insulating material disposed on the indoor side of the shoji in the prospective direction of the window frame, and the shoji has a face material and a frame fixed to the outer periphery of the face material. The aforementioned insulation material is arranged to overlap with the frame in the depth direction of the window frame.

[0007] The sash according to the present invention further, The aforementioned shoji screen includes an inner shoji screen and an outer shoji screen, The insulation material may be positioned on the interior side of the outer sash in the depth direction of the window frame, and overlapping with the inner sash in the visible direction of the window frame.

[0008] The sash according to the present invention further, The aforementioned shoji screen includes an inner shoji screen and an outer shoji screen, The aforementioned insulation material may be positioned in the depth direction of the window frame at a location that overlaps with the frame of the inner sash.

[0009] The sash according to the present invention further, The aforementioned insulation material may be fitted and fixed between the window frame and the stile.

[0010] The sash according to the present invention further, The aforementioned insulation material may be detachably attached to the window frame. [Effects of the Invention]

[0011] We can provide window frames with improved thermal insulation. [Brief explanation of the drawing]

[0012] [Figure 1] This is a view of a window frame installed in a wall, seen from the outside. [Figure 2] This is a cross-sectional view of the window frame in Figure 1, taken along the line II-II. [Figure 3] This is a cross-sectional view of the window frame taken along the line III-III in Figure 2. [Figure 4] This is a cross-sectional view of the window frame taken along the line VI-VI in Figure 2. [Figure 5] This is a horizontal cross-sectional view of the outer and inner frame portions on the left side. [Figure 6]Another horizontal cross-sectional view of the left outer frame and inner frame portions. [Figure 7] Another horizontal cross-sectional view of the left outer frame and inner frame portions. [Figure 8] A horizontal cross-sectional view of the sash when a reinforcing member is arranged on the indoor side of the inner sash. [Figure 9] Another horizontal cross-sectional view of the sash when a reinforcing member is arranged on the indoor side of the inner sash and a gap is provided between the inner sash and the reinforcing member.

Embodiments for Carrying Out the Invention

[0013] Based on the drawings, the sash according to an embodiment of the present invention will be described.

[0014] The sash described below is adopted as one of the building materials of a building such as a multi-story house having a steel frame structure, for example. The building in which the sash described below is adopted may have a reinforced concrete foundation, a frame structure composed of frame members such as columns and beams, and panels forming walls and floors, and may be composed of an upper structure fixed to the foundation. The frame members and panels can be standardized (standardized) in advance. In this case, the frame members and the like can be manufactured in a factory in advance and transported to the construction site to assemble the building.

[0015] (Explanation of the Outline) As shown in FIG. 1, the sash 100 according to the present embodiment is used by being attached to the wall portion 200 of a building. Note that FIG. 1 is a view seen from the outdoor side in the prospective direction of the sash 100 attached to the wall portion 200. The prospective direction is the same direction as the direction perpendicular to the wall portion 200 in the sash 100 when it is attached to the wall portion 200. In the present embodiment, the case where the wall portion 200 is erected perpendicular to the ground is shown, and the prospective direction is along the horizontal direction.

[0016] The sash 100 comprises at least an outer frame 1, which is a rectangular window frame; a sash S fitted inside the ring of the outer frame 1; and a frame insulation material 7 (an example of insulation material) positioned on the interior side of the sash S in the depth direction. The sash S is, for example, slidable in the visible direction. The visible direction is the direction along the horizontal direction with respect to the ground on which the building is installed, and along the wall surface of the wall 200, when the sash 100 is attached to a wall 200. The visible direction is perpendicular to the depth direction.

[0017] In the following, for the sake of clarity, when we simply refer to "outside" or "inside," we mean the inside in the direction of the view, and when we simply refer to "outside" or "outside," we mean the outside in the direction of the view. The outside of the surface or the direction of the outside in the shoji screen S is the same as the outside in the direction of the view or the direction facing the outside. When we refer to the view in the direction of the view towards the inside, we mean the view from the outside towards the inside in the direction of the view, and when we refer to the view in the direction of the view towards the outside, we mean the view from the inside towards the outside in the direction of the view.

[0018] Furthermore, for the sake of clarity, the same direction as the visible direction may be simply referred to as the width direction below. Also, when simply referred to as the width direction inside, it means the direction facing inward towards the ring of the outer frame 1 in the visible direction, and when simply referred to as the width direction outside, it means the direction facing outward towards the ring of the outer frame 1 in the visible direction.

[0019] Furthermore, for the sake of clarity, in the following explanation, when viewing the exterior direction in the prospective direction, the left side in the width direction will be simply referred to as left or left-side, and the right side in the width direction will be simply referred to as right or right-side. Also, the upward direction in the vertical direction will be simply referred to as up or upper side, and the downward direction in the vertical direction will be simply referred to as down or lower side.

[0020] As an example, the shoji screen S has a pair of outer shoji screens 2 and inner shoji screens 3. The inner shoji screen 3 is positioned on the interior side of the outer shoji screen 2. The outer shoji screen 2 and inner shoji screen 3 slide in the visible direction to form a sliding screen. When the shoji screen S (outer shoji screen 2 and inner shoji screen 3) is closed, it has facing materials 25, 35 and frames 20, 30 fixed to the outer periphery of these facing materials 25, 35. The frame insulation material 7 is positioned overlapping with the frames 20, 30 in the depth direction of the outer frame 1. This improves the thermal insulation of the sash 100. Unless otherwise specified, the following explanation of the positional relationships of each part of the shoji screen S is based on the closed state of the shoji screen S.

[0021] (Detailed explanation) Figure 2 shows a horizontal cross-section of the sash 100 in the direction of arrow II-II in Figure 1, i.e., in a top view. As shown in Figure 2, the sash 100 comprises a rectangular outer frame 1 in a view from the depth direction, an inner frame 4 which is a window frame fitted inside the ring of the outer frame 1 and into the interior side of the outer frame 1, outer sashes 2 and 3 which are sashes S fitted inside the ring of the outer frame 1, window frame insulation material 6 arranged to surround the outer perimeter of the interior side of the outer frame 1, and frame insulation material 7 arranged inside the sashes S. When the frame insulation material 7 is removed from the sash 100, the outer sashes 2 and 3 are slidable in the width direction in a sliding position inside the ring of the outer frame 1.

[0022] The exterior shoji screen 2 comprises a rectangular frame 20 when viewed from the inside, and facing materials 25 and 26 fitted inside the ring of the frame 20. The facing materials 25 and 26 overlap when viewed from the inside, with facing material 26 positioned on the interior side of facing material 25. The facing materials 25 and 26 are, for example, glass plates.

[0023] The frame 20 includes a door stop frame 20A that extends vertically and is adjacent to the outer frame 1 in the width direction, an outer meeting frame 20B that extends vertically and is spaced apart from the outer frame 1 in the width direction, a lower frame 20C (see Figure 3) that extends in the width direction and is located on the lower side, and an upper frame (not shown) that extends in the width direction and is located on the upper side. The frame 20 may be a frame formed as a single unit, or it may be formed by combining multiple frame materials.

[0024] In this embodiment, as an example, the frame 20 is shown as being formed of an outer frame 21 made of a metal material such as aluminum or an aluminum alloy, and an inner frame 22 made of a resin such as polyvinyl chloride (PCV). The outer frame 21 and the inner frame 22 are each rectangular frames. The outer frame 21 and the inner frame 22 may each be hollow in order to improve thermal insulation performance and reduce weight. The outer frame 21 is positioned on the exterior side of the inner frame 22. The outer frame 21 and the inner frame 22 overlap when viewed from the perspective. The outer frame 21 and the inner frame 22 are connected integrally to form the frame 20. Generally, resin has a lower thermal conductivity than metal materials, so by making the interior side of the frame 20 the inner frame 22, the thermal insulation performance of the sash 100 (see Figure 2) can be improved.

[0025] The interior shoji screen 3 comprises a rectangular frame 30 when viewed from the inside, and facing materials 35 and 36 fitted inside the ring of the frame 30. The facing materials 35 and 36 overlap when viewed from the inside, with facing material 36 positioned on the interior side of facing material 35. The facing materials 35 and 36 are, for example, glass plates.

[0026] The frame 30 includes a door stop frame 30A that extends vertically and is adjacent to the outer frame 1 in the width direction, an inner meeting frame 30B that extends vertically and is spaced apart from the outer frame 1 in the width direction, a lower frame 30C (see Figure 4) that extends in the width direction and is located on the lower side, and an upper frame (not shown) that extends in the width direction and is located on the upper side. The frame 30 may be a frame formed as a single unit, or it may be formed by combining multiple frame materials. The inner meeting frame 30B overlaps with the outer meeting frame 20B when viewed in the depth direction.

[0027] In this embodiment, as an example, the frame 30 is shown as being formed of an outer frame 31 made of a metal material such as aluminum or an aluminum alloy, and an inner frame 32 made of a resin such as polyvinyl chloride (PCV). The outer frame 31 and the inner frame 32 are each rectangular frames. The outer frame 31 and the inner frame 32 may each be hollow in order to improve thermal insulation performance and reduce weight. The outer frame 31 is positioned on the exterior side of the inner frame 32. The outer frame 31 and the inner frame 32 overlap when viewed from the perspective of depth. The outer frame 31 and the inner frame 32 are connected integrally to form the frame 30. Generally, resin has a lower thermal conductivity than metal materials, so by making the interior side of the frame 30 the inner frame 32, the thermal insulation performance of the sash 100 (see Figure 2) can be improved.

[0028] As shown in Figure 1, the outer frame 1 includes the first vertical frame 11 and the second vertical frame 12, which are vertical frames on both the left and right sides of the outer frame 1, and the upper frame 14 and the lower frame 13, which are horizontal frames at the top and bottom of the outer frame 1. The outer frame 1 is fixed to the wall 200 in a state that follows the wall surface of the wall 200. The outer frame 1 is fixed to the wall 200 in a state where its outer periphery is embedded in the wall 200. The outer frame 1 may be formed by integrally creating these frames 11 to 14, or it may be formed by connecting separately created frames 11 to 14 together. The outer frame 1 may be made of a metal material such as aluminum or an aluminum alloy, or of resin. The outer frame 1 may have a hollow structure to improve thermal insulation performance and reduce weight. In this embodiment, the case in which the outer frame 1 is made of an aluminum alloy will be described below as an example.

[0029] As shown in Figures 2 to 4, lower ribs 13a to 13c are formed on the upper surface of the lower frame 13, extending upward and along the direction of extension of the lower frame 13. The lower ribs 13a to 13c are arranged in this order from the outside to the inside in the depth direction. Figure 3 shows a cross-section taken along the line III-III in Figure 2. Figure 4 is a cross-sectional view taken along the line VI-VI in Figure 2. In Figure 3, the illustration of parts other than the cross-section (members visible in the depth direction of the arrows) is omitted, except for the inner sash 3. In Figure 4, the illustration of parts other than the cross-section (members visible in the depth direction of the arrows) is omitted.

[0030] The lower rib 13a extends from the exterior end of the lower frame 13. The lower rib 13b extends from the upper surface of the lower frame 13, on the interior side of the lower rib 13a. The lower rib 13c extends from the upper surface of the lower frame 13, on the interior side of the lower rib 13b. The lower rib 13b constitutes a rail L1 that serves as a guide for sliding the outer sash 2, which is fitted into the outer frame 1, in the width direction. The lower rib 13c constitutes a rail L2 (see Figures 3 and 4) that serves as a guide for sliding the inner sash 3, which is fitted into the outer frame 1, in the width direction. The lower rib 13a overlaps with the lower frames 20B and 30B when viewed in the depth direction.

[0031] In this embodiment, a cover 5 made of resin or the like is attached to the upper surface of the lower frame 13 in the area sandwiched between the lower ribs 13b and 13c. A cover rib 5b is formed at the outdoor end of the cover 5, extending upward and along the extending direction of the lower frame 13. The cover rib 5b is provided adjacent to the lower rib 13b on the indoor side of the lower rib 13b and together with the lower rib 13b constitutes the rail L1.

[0032] Although not shown in the diagram, guides such as rails or grooves are also formed on the underside of the upper frame 14 for sliding the outer sash 2 and inner sash 3.

[0033] As shown in Figure 2, the exterior end of the first vertical frame 11 is provided with a fin-shaped rib 11a that extends inward (to the right) in the width direction and along the extension direction (up and down direction) of the first vertical frame 11. The rib 11a may be integrally molded with the first vertical frame 11, or it may be attached and fixed to the first vertical frame 11. In this embodiment, the case in which the rib 11a is integrally molded with the first vertical frame 11 will be described below as an example.

[0034] Rib 11a is spaced apart from and overlaps with the door stop frame 20A when viewed from the perspective of the door stop frame 20A. Rib 11a is located on the exterior side of the door stop frame 20A. Rib 11a extends inward in the width direction beyond the center line G1 of the door stop frame 20A in the width direction. The center line G1 usually roughly coincides with the neutral line when a force is applied in the perspective direction to the exterior or interior end of the door stop frame 20A in the width direction. This improves the strength of the exterior sash 2 (especially the door stop frame 20A) against loads from the interior to the exterior (out-of-plane direction). Furthermore, from the standpoint of fire resistance, it is possible to improve the strength against energy, force, and impact that deform the exterior sash 2 toward the exterior due to heat, hot airflow, and blasts, thereby improving fire resistance. Therefore, it is not necessary to enlarge the outer sash 2 (for example, by increasing its size in the depth direction) in order to improve the strength of the outer sash 2 against loads directed to the outside. In this way, we have made it possible to provide a sash 100 in which the outer sash 2 can stand on its own against loads directed from the inside to the outside, and whose strength has been improved to the extent that it can prevent deformation such as twisting of the outer sash 2.

[0035] Figure 5 shows a horizontal cross-section in a top view of the vicinity of the first vertical frame 11 (the left portion of the outer frame 1) and the first vertical inner frame 41 (the left portion of the inner frame 4). In this embodiment, as shown in Figure 5, the rib 11a extends such that the inner end 11t in the width direction of the rib 11a is at the same position in the width direction as the inner end of the door stop frame 20A in the width direction, that is, the end 11t and the inner end of the door stop frame 20A in the width direction overlap in a view from the depth direction. Note that the end 11t may be located between the center line G1 of the door stop frame 20A and the inner end of the door stop frame 20A in the width direction in the width direction, as shown in Figure 6, or it may be located further inward in the width direction than the inner end of the door stop frame 20A in the width direction, as shown in Figure 7. From the viewpoint of aesthetics when viewed from the outside in the depth direction, it is preferable that the rib 11a extends in the width direction such that the end portion 11t is at the same position as the inner end portion of the door stop frame 20A in the width direction (see Figure 5), or even further inward in the width direction (see Figure 6). In other words, by forming the rib 11a in this way, when viewed from the inside in the depth direction, the door stop frame 20A completely overlaps with the rib 11a, and the rib 11a (outer frame 1) conceals the door stop frame 20A, resulting in a clean appearance when viewed from the outside of the sash 100 (see Figure 1).

[0036] As shown in Figure 2, the second vertical frame 12 is provided with a fin-shaped rib 12a at its exterior end, extending inward in the width direction (left side) and along the extension direction (up and down direction) of the second vertical frame 12. Furthermore, the second vertical frame 12 is provided with a fin-shaped rib 12b at its inner side, extending inward in the width direction (left side) and along the extension direction of the second vertical frame 12. The ribs 12a and 12b may be integrally molded with the second vertical frame 12, or they may be attached and fixed to the second vertical frame 12. In this embodiment, the case where the ribs 12a and 12b are integrally molded with the second vertical frame 12 will be described below as an example.

[0037] Rib 12a is spaced apart from door frame 30A and rib 12b when viewed in the depth direction, and overlaps with door frame 30A. Rib 12a is located on the exterior side of door frame 30A. From the exterior side to the interior side in the depth direction, rib 12a, rib 12b, and door frame 30A are arranged in this order. That is, rib 12b is located on the interior side in the depth direction of rib 12a, and rib 12a and rib 12b have an exterior rib and interior rib relationship. Rib 12a extends inward in the width direction beyond the center line G2 of door frame 30A in the width direction. Note that the center line G2 usually roughly overlaps with the neutral line when a force is applied in the depth direction to the exterior or interior end of door frame 30A in the width direction.

[0038] In this embodiment, the rib 12a extends such that the inner end of the rib 12a in the width direction is at the same position as the inner end of the door stop frame 30A in the width direction, that is, the inner end of the rib 12a in the width direction and the inner end of the door stop frame 30A in the width direction overlap when viewed from the depth direction. The inner end of the rib 12a in the width direction may be located between the center line G2 of the door stop frame 30A and the inner end of the door stop frame 30A in the width direction, or it may be located further inward in the width direction than the inner end of the door stop frame 30A in the width direction. From the viewpoint of aesthetics when viewed from the outside in the depth direction, it is preferable to extend the rib 12a to such an extent that the inner end of the rib 12a in the width direction is at the same position as the inner end of the door stop frame 30A in the width direction, or further inward in the width direction, as shown in Figure 2. By forming the rib 12a in this way, when viewed from the interior side in the depth direction, the door stop frame 30A completely overlaps with the rib 12a, and the rib 12a (outer frame 1) conceals the door stop frame 30A, resulting in a clean appearance when viewed from the exterior side of the sash 100 (see Figure 1).

[0039] Rib 12b is spaced apart from the door frame 30A and rib 12a when viewed from the perspective of the door. As described above, rib 12b is located on the exterior side of the door frame 30A and on the interior side of rib 12a. Rib 12b extends inward in the width direction beyond the center line G2 of the door frame 30A in the width direction. As described above, the center line G2 roughly coincides with the neutral line of the door frame 30A, so this improves the strength of the outer sash 3 against loads from the interior side to the exterior side (out-of-plane direction) on the interior sash 3 (especially the door frame 30A). Furthermore, from the standpoint of fire resistance, it is possible to improve the strength against energy, force, and impact that deform the outer sash 3 toward the exterior side due to heat, hot airflow, and blasts, thereby improving fire resistance. Therefore, it is not necessary to enlarge the inner sash 3 (for example, by increasing its size in the depth direction) in order to increase the strength of the inner sash 3 against loads directed from the outside. In this way, we have made it possible to provide a sash 100 in which the inner sash 3 can stand on its own against loads directed from the inside to the outside, and whose strength has been improved to the extent that it can prevent deformation such as twisting of the inner sash 3.

[0040] In this embodiment, the rib 12b extends such that its inner end in the width direction is at the same position as the inner end of the door frame 30A in the width direction, that is, at the same position as the inner end of the rib 12a in the width direction. In other words, the rib 12b extends such that its inner end in the width direction and the inner end of the door frame 30A in the width direction overlap when viewed from the depth direction.

[0041] Furthermore, the inner end of the rib 12b in the width direction may be located between the center line G2 of the door stop frame 30A and the inner end of the door stop frame 30A in the width direction, or it may be located further inward in the width direction than the inner end of the door stop frame 30A in the width direction. From the viewpoint of aesthetics when viewed from the outside in the depth direction, it is preferable that the inner end of the rib 12b in the width direction is in the same position as the inner end of the rib 12b in the width direction, or located between the center line G2 of the door stop frame 30A and the inner end of the rib 12b in the width direction. By forming the rib 12b in this way, when viewed from the inside in the depth direction, the rib 12b completely overlaps with the rib 11a, and the rib 12a conceals the rib 12b, resulting in a clean appearance when viewed from the outside of the sash 100 (see Figure 1).

[0042] If you wish to install a screen door on the sash 100, for example, you may install the screen door on the exterior side of the ribs 11a and 12a.

[0043] As shown in Figures 2 to 4, the inner frame 4 is a rectangular frame material in the depth direction that is fitted inside the ring of the outer frame 1 in the inner portion of the outer frame 1 in the depth direction. The inner frame 4 is made of a resin such as polyvinyl chloride (PCV). Generally, resins have a lower thermal conductivity than metal materials, so by placing the inner frame 4 on the interior side of the outer frame 1, the thermal insulation performance of the sash 100 (see Figure 2) can be improved. The inner frame 4 may have a hollow structure to improve thermal insulation performance and reduce weight.

[0044] In Figure 2, the vertical frames on the left and right sides of the inner frame 4 are shown as the first vertical inner frame 41 and the second vertical inner frame 42, respectively, and the horizontal frame at the bottom of the inner frame 4 is shown as the lower inner frame 43.

[0045] The first vertical inner frame 41 overlaps with the door stop frame 20A when viewed from the depth direction and is positioned on the interior side of the door stop frame 20A. The first vertical inner frame 41 overlaps with the inner sash 3 when viewed from the width direction. The second vertical inner frame 42 overlaps with the door stop frame 30A when viewed from the depth direction and is positioned on the interior side of the door stop frame 30A.

[0046] The inner end of the first vertical inner frame 41 in the width direction is located inward in the width direction, beyond the center line G1 of the door stop frame 20A in the width direction. This improves the strength of the outer sash 2 (especially the door stop frame 20A) against loads in the in-plane direction (indoor side).

[0047] The inner end of the second vertical inner frame 42 in the width direction is located inward in the width direction, beyond the center line G2 of the door stop frame 30A in the width direction. This improves the strength of the outer sash 2 against loads applied in the in-plane direction (indoor side) to the inner sash 3 (especially the door stop frame 30A).

[0048] The inner ends of the first vertical inner frame 41 and the inner ends of the second vertical inner frame 42 in the width direction are located in the same position in the width direction as the inner ends of the door stop frames 20A and 30A, respectively. As a result, when viewed from the interior side in the depth direction, the first vertical inner frame 41 and the second vertical inner frame 42 completely overlap with the door stop frames 20A and 30A, respectively, and the door stop frames 20A and 30A conceal the first vertical inner frame 41 and the second vertical inner frame 42, resulting in a clean appearance when viewed from the exterior side of the sash 100 (see Figure 1).

[0049] The lower inner frame 43 is located on the indoor side of the lower frame 13. In this embodiment, it is connected to the indoor end of the lower frame 13. A lower inner frame rib 43c is formed on the outdoor end of the lower inner frame 43, extending upward and along the extending direction of the lower frame 13. The lower inner frame rib 43c is provided adjacent to the lower rib 13c on the indoor side of the lower rib 13c, and together with the lower rib 13c, constitutes the rail L2.

[0050] The window frame insulation material 6 is an insulating material made of resin, rubber, wood, etc., formed in a sponge-like, cotton-like, or porous form. The window frame insulation material 6 is arranged to surround the outer perimeter of the outer frame 1 or inner frame 4. In this case, the window frame insulation material 6 may be embedded within the wall portion 200. The window frame insulation material 6 is preferably arranged in contact with the outer perimeter surface of the outer frame 1 or inner frame 4. Furthermore, the window frame insulation material 6 is preferably arranged on the interior side of the outer frame 1. This improves the thermal insulation performance of the sash 100 (see Figure 2).

[0051] Frame insulation material 7 is ,example For example, it is an insulating material made of resin, rubber, wood, etc., formed in a spongy, cotton-like, porous, etc. The frame insulation material 7 may be solid or hollow. The frame insulation material 7 is used to suppress the exchange of heat between the shoji screen S and the outer frame 1 or inner frame 4, and through the frames 30, 40.

[0052] As shown in Figure 2, the frame insulation material 7 is positioned on the interior side in the depth direction of the outer frame 1 compared to the shoji screen S. Furthermore, the frame insulation material 7 overlaps with the frame 20 or frame 30 in the depth direction of the outer frame 1. Additionally, the frame insulation material 7 is positioned inside the ring of the outer frame 1 or the inner frame 4.

[0053] The frame insulation material 7 may overlap with the bottom frame 20C in the depth direction of the outer frame 1, as shown in Figures 2 and 3. Alternatively, the frame insulation material 7 may overlap with the bottom frame 30C in the depth direction of the outer frame 1, as shown in Figures 2 and 4. In Figures 2 and 3, the frame insulation material placed on the interior side of the bottom frame 20C of the outer sash 2 is shown as the outer sash side frame insulation material 71, and in Figure 2 and 4, the frame insulation material placed on the interior side of the bottom frame 30C of the interior sash 3 is shown as the interior sash side frame insulation material 72.

[0054] The outer sash side frame insulation material 71 may be fixed on the lower frame 13, for example, on the lower inner frame 43 or cover 5 by fitting or other means. Figure 3 shows the case where the outer sash side frame insulation material 71 is placed on the lower inner frame 43 and cover 5. In the example shown in Figure 3, a groove 71a along the width direction is provided at the lower part of the outer sash side frame insulation material 71, and the rail L2 is fitted into this groove 71a to fix the outer sash side frame insulation material 71. In this way, by placing and fixing the outer sash side frame insulation material 71 on the lower frame 13 (in Figure 3, in contact with the upper surfaces of the lower inner frame 43 and cover 5) on the interior side of the lower frame 20C in the depth direction, the gap between the lower frame 20C and the lower inner frame 43 and cover 5 is narrowed, thereby inhibiting air leakage (intrusion or outflow) in the depth direction through this gap and improving the thermal insulation performance of the sash 100. Furthermore, by inhibiting heat transfer and heat radiation from the lower frame 13, lower inner frame 43, cover 5 and lower frame 20C, the thermal insulation performance of the sash 100 can be improved.

[0055] The inner sash side frame insulation material 72 may be fixed on the lower frame 13, for example, on the lower inner frame 43 or cover 5, by fitting or clamping. Figure 4 shows a case where the inner sash side frame insulation material 72 is fixed by clamping it between the lower inner frame 43 and cover 5 and the lower frame 30C. In the example shown in Figure 4, a groove 72a along the width direction is provided at the lower part of the inner sash side frame insulation material 72, and the rail L2 is fitted into this groove 72a to ensure that the inner sash side frame insulation material 72 is securely fixed. In this way, by sandwiching and fixing the inner sash side frame insulation material 72 between the lower frame 13 (in Figure 4, the lower frame 13 via the lower inner frame 43 and cover 5) and the lower frame 30C, the gap below the lower frame 30C, for example, the gap between the lower frame 13 (in Figure 4, the lower inner frame 43 and cover 5) and the lower frame 30C can be narrowed, thereby inhibiting air leakage (intrusion or outflow) in the depth direction through this gap and improving the thermal insulation performance of the sash 100. Furthermore, heat transfer and heat radiation from the lower frame 13, lower inner frame 43, cover 5 and lower frame 30C can be inhibited, thereby improving the thermal insulation performance of the sash 100.

[0056] It is even better to form insulating ribs 72b extending upward from the interior end of the insulating material 72 on the inner sash side frame. If these insulating ribs 72b overlap with the bottom frame 30C in the depth direction, heat transfer in the depth direction is inhibited at the bottom frame 30C, and the thermal insulation performance of the sash 100 can be further improved.

[0057] As shown in Figure 2, it is preferable to also place the inner sash side frame insulation material 72 between the door stop frame 30A and the second vertical inner frame 42, and between the door stop frame 30A and the second vertical frame 12. This further enhances the thermal insulation performance of the sash 100.

[0058] As shown in Figures 2 to 4, when the outer sash frame insulation material 71 (see Figures 2 and 3) and the inner sash frame insulation material 72 (see Figures 2 and 4) are fixed by fitting or clamping, the outer sash frame insulation material 71 and the inner sash frame insulation material 72 may be made detachable. When the outer sash frame insulation material 71 and the inner sash frame insulation material 72 are attached to the sash 100, the inner sash 3 will no longer be able to slide (open and close). As a result, maintenance such as cleaning the exterior surface of the inner sash 3, for example, the exterior surface of the facing material 35 (see Figures 2 and 4), may become impossible or inconvenient. However, if the outer sash frame insulation material 71 and the inner sash frame insulation material 72 are made detachable, it becomes possible to remove the outer sash frame insulation material 71 and the inner sash frame insulation material 72 in advance when performing the above maintenance, thereby enabling maintenance of the exterior surface of the panel material 35 and improving maintainability. When the outer sash frame insulation material 71 and the inner sash frame insulation material 72 are made detachable, it is preferable to form the outer sash frame insulation material 71 and the inner sash frame insulation material 72 from a flexible material such as rubber or sponge.

[0059] In this way, we can provide a window frame with improved thermal insulation.

[0060] [Another embodiment] (1) In the above embodiment, the case in which the ribs 11a and 12b and the door stop frames 20A and 30A overlap in the depth direction of the outer frame 1 was described. However, it is not essential that both ribs 11a and rib 12b overlap with the door stop frames 20A and 30A, respectively; it is sufficient if rib 11a and door stop frame 20A, or rib 12b and door stop frame 30A, overlap.

[0061] (2) In the above embodiment, the case was described in which the ribs 11a and 12b and the door stop frames 20A and 30A overlap in the depth direction of the outer frame 1, and the ribs 11a and 12b extend beyond the centerlines G1 and G2 of the door stop frames 20A and 30A in the width direction. However, it is not essential that both ribs 11a and ribs 12b extend beyond the centerlines G1 and G2, respectively; it is sufficient if either rib 11a or rib 12b extends beyond the centerline G1 or the centerline G2.

[0062] (3) In the above embodiment, the case was described in which the 12b and the door stop frame 30A overlap in the depth direction of the outer frame 1, and the rib 12b extends beyond the center line G2 of 30A in the width direction. It was explained that this makes it possible to improve the strength of the outer sash 3 against loads from the indoor side to the outdoor side (out-of-plane direction) on the inner sash 3 (especially the door stop frame 30A).

[0063] In the above embodiment, if it is desired to further improve the strength of the outer sash 3 against loads applied from the outside to the inside (out-of-plane direction) on the inner sash 3 (particularly the inner meeting stile 30B), a reinforcing material 8 may be placed on the interior side of the inner sash 3, as shown in Figures 8 and 9. By placing the reinforcing material 8, the strength of the outer sash 3 against loads applied from the outside to the inside (out-of-plane direction) can be improved without increasing the size of the inner meeting stile 30B in the depth direction. The reinforcing material 8 may be made of a metal material or a resin material, but from the viewpoint of thermal insulation, it is preferable to make it out of a resin material such as polyvinyl chloride. That is, if the reinforcing material 8 is made of a resin material, the thermal insulation of the sash 100 can also be improved.

[0064] The reinforcing material 8 may be positioned, for example, on the interior side of the interior meeting stile 30B, along the interior meeting stile 30B. In this case, it is preferable to overlap the reinforcing material 8 with the interior meeting stile 30B in the depth direction. By overlapping in this way, the strength of the outer sash 3 against loads from the exterior side to the interior side (out-of-plane direction) is appropriately improved.

[0065] Furthermore, when viewed from the interior side in the depth direction, the reinforcing material 8 should completely overlap with the interior meeting stile 30B, and when viewed from the exterior side in the depth direction, the meeting stile 30B should completely overlap with the reinforcing material 8. In other words, when viewed from one side to the other in the depth direction, the reinforcing material 8 and the meeting stile 30B should overlap in such a way that they conceal each other. This improves the aesthetic appearance of the sash 100 when viewed from the depth direction.

[0066] The reinforcing member 8 may be fixed to the frame 30B by adhesive or screws, etc., by bringing the reinforcing member 8 into contact with the interior surface of the interior meeting frame 30B. Alternatively, in order to suppress heat transfer from the interior meeting frame 30B to the reinforcing member 8 and improve thermal insulation, the reinforcing member 8 may be positioned along the interior side of the interior meeting frame 30B and spaced apart from the interior meeting frame 30B, creating a gap between the reinforcing member 8 and the interior meeting frame 30B (see Figure 9). If a gap is created between the reinforcing member 8 and the interior meeting frame 30B, the upper and lower ends of the reinforcing member 8 may be fixed to the outer frame 1 via the outer frame 1 or the inner frame 4. Figure 9 shows the case where the upper and lower ends of the reinforcing member 8 are fixed to the outer frame 1 via the inner frame 4.

[0067] The reinforcing member 8 may have a hollow structure, but as shown in Figures 8 and 9, it may also consist of a cylindrical outer cylinder portion 81 made of resin and a skeleton 82 made of metal or the like inserted into the cylinder of the outer cylinder portion 81.

[0068] (4) In the above embodiment, the case was described in which the frame insulation material 7 is provided by providing the outer sash side frame insulation material 71 on the interior side of the lower frame 20C of the outer sash 2 and the interior sash side frame insulation material 72 on the interior side of the lower frame 30C of the interior sash 3. However, the insulation performance of the sash 100 is improved even if only the outer sash side frame insulation material 71 or only the interior sash side frame insulation material 72 is provided.

[0069] (5) In the above embodiment, the case was described in which the frame insulation material 7 is placed on the interior side of the lower frame 20C of the outer sash 2 and the lower frame 30C of the inner sash 3, and further, is placed overlapping with the lower frame 20C and the lower frame 30C in the depth direction. However, the frame insulation material 7 is not limited to the interior side of the lower frame 20C and the lower frame 30C of the frame 20 or frame 30, but the insulation performance of the sash 100 will be improved if it is placed at any location on the interior side of the frame 20 or the interior side of the frame 30, overlapping with the frame 20 or frame 30 in the depth direction.

[0070] (6) In the above embodiment, it was explained that when the outer sash side frame insulation material 71 or the inner sash side frame insulation material 72 is attached to the sash 100, the inner sash 3 may not be able to slide (open and close). For this reason, the sash 100 in the above embodiment may be used as a single-sliding sash instead of a sliding sash. In other words, the sash 100 with the same structure may be used as a sliding sash or as a single-sliding sash, depending on the circumstances, and parts may be made common.

[0071] Furthermore, the configurations disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments, as long as no inconsistencies arise. Moreover, the embodiments disclosed herein are illustrative, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the object of the present invention. [Industrial applicability]

[0072] This invention can be applied to window frames. [Explanation of Symbols]

[0073] 1. Outer frame (window frame) 100 sash 11 First vertical frame 11a Rib 11t end 12 Second vertical frame 12a Rib 12b Rib 13 Bottom frame 13a Rib 13b Rib 13c Rib 14 Upper frame 2. Outer shoji screen 20 stile 200 Wall 20A Door stopper frame 20B Outer meeting frame 20C Lower stile 21 Outer stile 22 Inner stile 25 Surface material 26 Surface material 3 Inside Shoji (paper screen) 30 stile 30A Door stopper frame 30B Inner meeting frame 30C Lower stile 31 Outer stile 32 Inner stile 35 Surface material 36 Surface material 4. Inner frame (window frame) 41 First vertical inner frame 42 Second vertical inner frame 43 Lower inner frame 43c Lower inner frame rib 5 Cover 5b Cover Rib 6. Window frame insulation 7. Frame insulation material (insulation material) 71. Insulation material for the outer sliding door frame. 71a Groove 72. Insulation material for the side frame of a shoji screen. 72a Groove 72b Insulation ribs 8. Reinforcement material 81 Outer cylinder 82 Skeleton L1 Rail L2 Rail S Shoji

Claims

1. A rectangular window frame, The shoji screen fitted inside the ring of the aforementioned window frame, The window frame comprises an insulating material positioned on the interior side of the shoji screen in the depth direction of the window frame, The aforementioned shoji screen includes an inner shoji screen and an outer shoji screen, and has a facing material and a frame fixed to the outer periphery of the facing material. The aforementioned insulating material is positioned in a sliding sash window where, in the view toward the outside in the depth direction of the window frame, it overlaps with the bottom frame of the inner sash, and is located on the interior side of the outer sash in the depth direction of the window frame, and overlaps with the inner sash in the view toward the face direction of the window frame, thereby concealing the bottom frame of the inner sash.

2. The sliding sash according to claim 1, wherein the insulating material is positioned to overlap with the bottom frame of the outer sash when viewed from the outside in the depth direction of the window frame, and the bottom frame of the outer sash is concealed.

3. The sliding sash according to claim 2, wherein the insulating material is fitted and fixed between the window frame and the stile.

4. The sliding sash according to any one of claims 1 to 3, wherein the insulation material is detachably attached to the window frame.

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