Sash windows

Abstract

To provide an airtight / heat insulating structure of a sash window which can reduce the visible width of a door frame while ensuring / improving airtightness and heat insulating properties. [Solution] When the shoji screens 12 and 13 are closed and one of the adjacent shoji screens 12 has a joining frame 10d overlapping the other of the adjacent shoji screens 13 in the depth direction T3, an airtight material 24 is attached to the surface of one of the opposing joining frames 10d, and a resin material 21 is attached to the surface of the other joining frame 10d, to which the airtight material adheres.

Description

[Technical Field]

[0001] The present invention relates to an airtight / thermal insulating structure for a sash window. [Background technology]

[0002] Traditionally, buildings such as offices and houses have used a variety of sash windows, each with different opening and closing methods and functions, such as sliding windows, casement windows, fixed windows (fixed windows), single-hung windows, outward-opening windows, inward-opening windows, folding windows, and pivoting windows.

[0003] Of these, sliding sash windows have a frame fixed to the outer edge of the building's opening, and two shoji screens are placed inside the frame so that they can slide left and right to open and close the opening. Each shoji screen is made up of a square frame-shaped frame consisting of an upper and lower frame and left and right vertical frames (one of the vertical frames is a joint frame) made from aluminum or resin profiles, and a glass panel placed inside the frame.

[0004] Each shoji screen has a guide groove with a concave cross section formed in its upper frame, which engages with an upper rail formed on the upper frame of the frame. Furthermore, a door roller is housed in the lower frame, and the lower frame and door roller are engaged on a lower rail with a convex cross section provided on the lower frame of the frame. This allows the shoji screen to slide left and right, guided by the upper rail and lower race of the frame.

[0005] In addition, intermediate rails are protruding from the upper and lower frames and are arranged between the upper and lower frames of one shoji screen and the other, and each shoji screen is arranged to be able to slide and move so that it can be guided by these upper and lower intermediate rails.

[0006] On the other hand, in sliding window sashes, a smoke deflector with an approximately L-shaped cross section is integrated into the sliding door frame of the shoji screen, and when the pair of shoji screens are closed, the sliding door frames overlap and the smoke deflectors engage with each other.

[0007] Furthermore, there are some shoji screens in which a resin cover (resin material) is attached to the outside of the aluminum profile on the joining frame of one of the shoji screens to ensure insulation and airtightness, and when the pair of shoji screens are closed, the joining frames overlap and the resin cover of one shoji screen abuts against the aluminum profile of the other shoji screen, thereby ensuring insulation and airtightness (see, for example, Patent Document 1).

[0008] Furthermore, in general, in sliding window sashes 100 in mid- to high-rise buildings, as shown in Figure 13, for example, the abutment / airtight line R1 where the resin material 3 of one joint frame 1 abuts against the aluminum profile (aluminum part) of the other joint frame 2 is located inside the room rather than the smoke deflector 4, and a water drain 5 is located outside this airtight line R1 to prevent the intrusion of water such as rainwater.

[0009] In a sliding window sash 100 for a house, for example, as shown in Figure 14, the abutment / airtight line R1 where the resin material 3 of one joint frame 1 abuts against the aluminum profile (aluminum part) of the other joint frame 2 is located outside the room beyond the smoke deflector 4, and this airtight line (abutment) R1 is configured to also serve as a water drain. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-51535 Summary of the Invention [Problem to be solved by the invention]

[0011] However, in the above-mentioned conventional sliding window sashes, a resin material (resin cover) that has excellent insulating properties but is prone to thermal shrinkage is attached to one of the joint frames, and this resin material abuts the aluminum profile of the other joint frame to ensure insulation and airtightness.Therefore, if thermal shrinkage occurs in the resin material, a gap will form between the aluminum profile and the resin material, and there is a risk that insulation and airtightness will not be ensured.

[0012] Furthermore, when a resin material is installed on the interior side of a sliding window sash in a mid- to high-rise building, forming an airtight seal on the interior side, and a resin material that forms an insulating layer is installed on the surface of the joint frame facing the interior, the width of the joint frame must be increased to match the size of the resin material in order to achieve the desired insulating performance. This can lead to a deterioration in appearance (deterioration of design) and increased costs.

[0013] Furthermore, as in the case of sliding window sashes in residential homes, if the abutment / airtight line where the resin material of one joint frame abuts the aluminum profile of the other joint frame is located on the outside of the room and this airtight line (abutment) also serves as a drain, it may be affected by the temperature difference between the outside and inside of the room, making it more likely that condensation will occur around the airtight line on the outside of the room, making it difficult to ensure watertightness.

[0014] In view of the above circumstances, the present invention aims to provide an airtight / insulating structure for a sash window that ensures / improves airtightness and insulating properties while minimizing the visible width of the door frame. [Means for solving the problem]

[0015] In order to achieve the above object, the present invention provides the following means.

[0016] The airtight / insulated structure of a sash window of the present invention comprises a plurality of shoji screens supported on a frame attached to the outer periphery of an opening formed in a building, with at least one shoji screen supported on the frame so that it can slide and move and open the opening, and each shoji screen comprises a frame having an upper frame, a lower frame, a vertical frame, and a joint frame, and a glass panel whose outer edge is held by the frame to form a window surface, and when the shoji screens are closed and one joint frame of one adjacent shoji screen overlaps the other joint frame of the other shoji screen in the depth direction, the frame comprises an airtight material attached to the surface of one of the opposing joint frames, and a resin material attached to the surface of the other joint frame and to which the airtight material is in close contact.

[0017] Furthermore, in the airtight / insulated structure of the sash window of the present invention, it is desirable that an airtight piece be provided between the upper end of the airtight material and the upper frame of the frame body, and / or between the lower end of the airtight material and the lower frame of the frame body, and that the airtight piece be provided with an airtight material adjacent portion adjacent to the airtight material.

[0018] Furthermore, in the airtight / heat insulating structure of the sash window of the present invention, it is more desirable that the airtight material is an elastic body.

[0019] Furthermore, in the airtight / insulated structure of the sash window of the present invention, it is further desirable that the upper frame of the frame body has an intermediate wall portion that protrudes downward and extends widthwise between the depth direction of the upper sides of a pair of adjacent shoji screens, and the lower frame of the frame body has an intermediate wall portion that protrudes upward and extends widthwise between the depth direction of the lower sides of a pair of adjacent shoji screens, and that another airtight material is attached to the intermediate wall portion of the upper and / or lower frame and is in close contact with one of the joint frames, and that the airtight line formed by the abutment of the airtight material attached to the surface of the other joint frame and the resin material and the airtight line formed by the abutment of the other airtight material attached to the intermediate wall portion and one of the joint frames are offset in the depth direction. [Effects of the Invention]

[0020] According to the sash window of the present invention, it is possible to reduce the visible width of the door frame while ensuring / improving airtightness and heat insulation. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a cross-sectional view showing an airtight / heat insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 2] 1 is a vertical cross-sectional view showing an airtight / heat insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 3] FIG. 2 is an enlarged view of the S1 portion of FIG. 1, and is a cross-sectional view showing the airtight / heat insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 4]3 is an enlarged view of the S2 portion of FIG. 2, and is a vertical cross-sectional view showing the airtight / heat insulating structure of the upper portion of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 5] 3 is an enlarged view of the S3 portion of FIG. 2, and is a vertical cross-sectional view showing the airtight / heat insulating structure of the lower part of the sliding window sash (sash window) according to one embodiment of the present invention. [Figure 6] FIG. 10 is a perspective view showing a fourth airtight / heat insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 7] FIG. 10 is a perspective view showing a fourth airtight / heat insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 8] 10A and 10B are cross-sectional views showing a fourth airtight / heat-insulating structure and a fifth airtight / heat-insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 9] FIG. 10 is a perspective view showing a fifth airtight / heat insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 10] FIG. 10 is a vertical cross-sectional view showing a modified example of the fifth airtight / heat insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 11] FIG. 10 is a vertical cross-sectional view showing a modified example of the fifth airtight / heat insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 12] FIG. 10 is a vertical cross-sectional view showing a modified example of the airtight / heat insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 13] FIG. 1 is a cross-sectional view showing the airtight / insulating structure of a conventional highly watertight sliding window sash (sash window). [Figure 14] FIG. 1 is a cross-sectional view showing the airtight / insulating structure of a conventional low-watertight sliding window sash (sash window). DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, an airtight / heat insulating structure for a sash window according to one embodiment of the present invention will be described with reference to FIGS.

[0023] Here, in this embodiment, the sash window according to the present invention will be described as a sliding window, but the present invention is applicable to any sash window that has a sliding door and a frame, and the sash window according to the present invention may be a sash window with different opening and closing methods and functions, such as a casement window or a single sliding window, in addition to a sliding window.

[0024] First, as shown in Figures 1 and 2, the sliding window sash (sash window) A of this embodiment is configured with a frame (sash) 10 consisting of an upper frame 10a, a lower frame 10b, one vertical frame 10c, and a joint frame 10d between the other vertical frame, and a glass panel (shoji main body) 11 whose outer edge is held by the frame 10 to form the window surface.

[0025] The frames 10 are hollow and made of aluminum or resin. Each frame 10 (10a, 10b, 10c, 10d) has a recessed fitting formed between a pair of side walls on the inner periphery, and the outer edge of the glass panel 11 is engaged with and held in place by this recessed fitting.

[0026] As shown in Figures 2, 4, and 5, each of the shoji screens 12 and 13 is arranged with its upper frame 10a engaged in an engaging recess provided in the upper frame 16 of the frame body 15. The lower frame 10b is provided with an engaging recess with a concave cross section that opens downwards and a door roller 18 housed in the engaging recess, and the engaging recess and door roller 18 are engaged with a lower rail that protrudes upward from the lower frame 17 of the frame body 15. As a result, the shoji screens 12 and 13 are arranged to be slidable in the left-right direction (width direction T1) while being guided by the upper frame 16 and lower frame 17 of the frame body 15.

[0027] Furthermore, the upper frame 16 (lower frame 17) of this embodiment is provided with intermediate wall portions (intermediate rails) 20 that are arranged between the upper frames 10a of one shoji screen 12 and the other shoji screen 13 and between the lower frames 10b of the other shoji screen, and each shoji screen 12, 13 is arranged to be able to slide and move so as to be guided by these upper and lower intermediate wall portions 20 as well.

[0028] As shown in Figures 1 and 3, the joining frames 10d of a pair of shoji screens 12 and 13 are provided with smoke deflectors 4 having an L-shaped cross section, and when the shoji screens 12 and 13 are closed, the joining frames 10d overlap and the smoke deflectors 4 engage with each other.

[0029] On the other hand, in the double sliding window sash A of this embodiment, the sliding screens 12 and 13 are closed so that the joining frames 10d overlap each other, and an airtight / insulating structure B is provided to ensure airtightness (including watertightness) and thermal insulation.

[0030] In addition, the airtight / insulating structure B of this embodiment includes a first airtight / insulating structure B1, a second airtight / insulating structure B2, a third airtight / insulating structure B3, a fourth airtight / insulating structure B4, and a fifth airtight / insulating structure B5.

[0031] The first airtight / insulating structure B1, as shown in Figures 1, 2 and 3, is intended to ensure airtightness and thermal insulation in the vertical direction T2 in the extension direction of the joining frames 10d when the joining frames 10d of a pair of shoji screens 12 and 13 overlap each other; the second airtight / insulating structure B2, as shown in Figures 2 and 4 (Figures 1 and 3), is intended to ensure airtightness and thermal insulation between the upper frame 16 and the joining frames 10d and upper frame 10a; and the third airtight / insulating structure B3, as shown in Figures 2 and 5 (Figures 1 and 3), is intended to ensure airtightness and thermal insulation between the lower frame 17 and the joining frames 10d and lower frame 10b. In addition, as shown in Figures 6 to 9, the fourth airtight / insulating structure B4 is intended to ensure airtightness and thermal insulation between the first airtight / insulating structure B1 and the third airtight / insulating structure B3, and the fifth airtight / insulating structure B5 is intended to ensure airtightness and thermal insulation between the first airtight / insulating structure B1 and the second airtight / insulating structure B2.

[0032] Specifically, as shown in Figures 1 to 5, the first airtight / insulating structure B1 of this embodiment is configured to include a first resin material (resin cover) 21 that is provided on the surface (portion) of the joining frame 10d of one shoji screen 13 that faces the joining frame 10d of the other shoji screen 12 and forms an insulating layer, and a first airtight material (side airtight material) 24 that engages with a groove-shaped first engaging portion 23 that extends in the vertical direction T2 and is formed on the surface (aluminum portion) of the joining frame 10d of one shoji screen 12 that faces the joining frame 10d of the other shoji screen 13, and is arranged so that it can be in close contact with the first resin material 21 of the other joining frame 10d.

[0033] The first airtight material 24 is formed with an engaging base end 24a that detachably engages with the first engaging portion 23 of one of the joint frames 10d to position and hold the first airtight material 24, and an airtight / insulating main body portion 24b that protrudes from the engaging base end 24a toward the first resin material 21 of the other joint frame 10d when the engaging base end 24a is engaged with the first engaging portion 23, and whose protruding tip is in close contact with the first resin material 21.

[0034] The first airtight material 24 is made of resin and is elastically deformable, and is formed to have a predetermined length in the vertical direction T2 from the upper side to the lower side of one of the joint frames 10d. Furthermore, the first airtight material 24 of this embodiment is formed so that the tip side of the airtight / insulating main body 24b has a convex arc-shaped cross section. The engaging base end 24a is formed in a substantially flat plate shape.

[0035] Furthermore, in this embodiment, in order to improve thermal insulation, a resin cover 25 is attached to one of the joint frames 10d so as to cover the two indoor side surfaces excluding the surface on which the first airtight material 24 and the smoke deflector 4 are provided. In addition, the first airtight material 24 of one of the joint frames 10d is provided on the indoor side of the smoke deflector 4.

[0036] As a result, the first airtight / insulating structure B1 of this embodiment forms a first airtight line R2 on the inside of the room by means of a first resin material 21 attached to the joining frame 10d of the other shoji screen 13 to form an insulating layer, and a first airtight material 24 attached to the joining frame 10d of one shoji screen 12 abutting this first resin material 21.

[0037] Next, the second airtight / insulated structure B2 of this embodiment, which ensures airtightness and insulation between the upper frame 16 and the joint frame 10d and upper frame 10a, is configured by providing a groove-shaped second engagement portion 26 along the width direction T1 in the extension direction of the upper frame 16 on the surface facing the outside of the room of the intermediate rail (intermediate wall portion) 20 of the upper frame 16, as shown in Figures 2 and 4, and engaging and attaching a second airtight material (upper airtight material) 27 to this second engagement portion 26.

[0038] The second airtight material 27, similar to the first airtight material 24, is formed with an engaging base end 27a that detachably engages with the second engaging portion 26 of the upper frame 16 to position and hold the second airtight material 27, and an airtight / insulating main body portion 27b whose protruding tip is in close contact with the upper frame 10a of the other shoji screen 13 from the engaging base end 27a when the engaging base end 27a is engaged with the second engaging portion 26.

[0039] The second airtight material 27 is made of resin and is elastically deformable, and is formed with a predetermined length in the horizontal direction that reaches approximately both ends in the width direction T1 of the upper frame 16. Furthermore, the second airtight material 27 of this embodiment is formed so that the tip end side of the airtight / insulating main body 27b has a convex arc-shaped cross section, and the engaging base end 27a is formed in an approximately flat plate shape.

[0040] In the second airtight / insulating structure B2, the tip of the airtight / insulating main body 27b of the second airtight material 27 attached to the intermediate rail 20 of the upper frame 16 is in close contact with the upper frame 10a of the other shoji screen 13.

[0041] As a result, the second airtight / heat insulating structure B2 of this embodiment forms a second airtight line R3 on the indoor side by the second airtight material 27 abutting against the upper frame 10a of the other shoji screen 13.

[0042] At this time, the second airtight line R3 formed by the second airtight material 27 is formed at a position shifted toward the outside of the room (a different position in the forward direction (depth direction T3)) than the first airtight line R2 formed by the first resin material 21 attached to the other joint frame 10d to form an insulating layer and the first airtight material 24 attached to one of the joint frames 10d abutting the first resin material.

[0043] Next, the third airtight / insulating structure B3 of this embodiment, which is used to ensure airtightness and thermal insulation between the lower frame 17 and the joint frame 10d and the lower frame 10b, is roughly configured as an inverted version of the second airtight / insulating structure B2, as shown in Figures 2 and 5.

[0044] That is, the third airtight / insulated structure B3 of this embodiment has a third engagement portion 30 formed on the surface (portion) of the intermediate wall portion 20 of the lower frame 17 facing the outside of the room, along the width direction T1 in the extension direction of the lower frame 17, and is configured by engaging and attaching a third airtight material (lower airtight material) 31 to this third engagement portion 30.

[0045] Like the first airtight material 24 and the second airtight material 27, the third airtight material 31 is formed with an engaging base end 31a that detachably engages with the third engaging portion 30 of the bottom frame 17 to position and hold the third airtight material 31, and an airtight / insulating main body portion 31b whose protruding tip is in close contact with the bottom frame 10b of the other shoji screen 13 from the engaging base end 31a when the engaging base end 31a is engaged with the third engaging portion 30.

[0046] The third airtight material 31 is made of resin and is elastically deformable, and is formed with a predetermined length in the horizontal direction that reaches approximately both ends in the width direction T1 of the lower frame 17. Furthermore, similar to the first airtight material 24 and the second airtight material 27, the third airtight material 31 of this embodiment is formed so that the tip end side of the airtight / insulating main body 31b has a convex arc-shaped cross section, and the engaging base end 31a is formed in an approximately flat plate shape.

[0047] In the third airtight / insulating structure B3, the tip of the airtight / insulating main body 31b of the third airtight material 31 attached to the intermediate wall portion 20 of the bottom frame 17 is in close contact with the bottom frame 10b of the other shoji screen 13.

[0048] As a result, in the third airtight / heat insulating structure B3 of this embodiment, the third airtight material 31 abutting against the bottom frame 10b of the other shoji screen 13 forms a third airtight line R4 on the indoor side.

[0049] In addition, at this time, the third airtight line R4 formed by the third airtight material 31 is formed at a position shifted toward the outside of the room (a different position in the forward direction (depth direction T3)) than the first airtight line R2 formed by the first resin material 21 attached to the other joint frame 10d to form an insulating layer and the first airtight material 24 attached to one of the joint frames 10d abutting the first resin material 21.

[0050] Next, the fourth airtight / insulating structure B4 of this embodiment is intended to ensure airtightness and insulation between the first airtight / insulating structure B1 and the third airtight / insulating structure B3, and is configured with a fourth airtight material (airtight piece) 32 made of resin interposed between the lower end of the first airtight material 24 of the first airtight / insulating structure B1 and one side end of the third airtight material 31 of the third airtight / insulating structure B3, as shown in Figures 6, 7 and 8.

[0051] The fourth airtight material 32 is provided so as to connect the airtight lines formed by the first airtight / insulating structure B1 and the third airtight / insulating structure B3. The fourth airtight material 32 of this embodiment is provided with a protruding portion (airtight material adjacent portion) 32a that protrudes upward (in the vertical direction T2) and is disposed adjacent to the lower end side of the first airtight material 24 of the first airtight / insulating structure B1, and a fitting portion 32b that is recessed in the width direction T1 and into which one side end of the third airtight material 31 of the third airtight / insulating structure B3 fits.

[0052] In this way, the fourth airtight material 32 of the fourth airtight / insulating structure B4 is interposed between the lower end of the first airtight material 24 of the first airtight / insulating structure B1 and one side end of the third airtight material 31 of the third airtight / insulating structure B3.Furthermore, the protrusion 32a of the fourth airtight material 32 is adjacent to the lower end side of the first airtight material 24, and one side end of the third airtight material 31 is fitted into the fitting portion 32b of the fourth airtight material 32, so that a series of airtight lines are formed in this portion, and the airtightness and insulation between the first airtight / insulating structure B1 and the third airtight / insulating structure B3 are suitably ensured.

[0053] Next, the fifth airtight / insulating structure B5 of this embodiment is intended to ensure airtightness and insulation between the first airtight / insulating structure B1 and the second airtight / insulating structure B2, and is configured with a fifth airtight material (airtight piece) 33 made of resin interposed between the upper end of the first airtight material 24 of the first airtight / insulating structure B1 and one side end of the second airtight material 27 of the second airtight / insulating structure B2, as shown in Figure 9 (see Figures 7 and 8).

[0054] Similar to the fourth airtight material 32, this fifth airtight material 33 is provided so as to connect the airtight lines formed by the first airtight / insulating structure B1 and the second airtight / insulating structure B2. The fifth airtight material 33 of this embodiment is formed with a protruding portion (airtight material adjacent portion) 33a that protrudes downward (in the vertical direction T2) and is disposed adjacent to the upper end side of the first airtight material 24 of the first airtight / insulating structure B1, and a fitting portion 33b that is recessed in the width direction T1 and into which one side end of the second airtight material 27 of the second airtight / insulating structure B2 fits.

[0055] In this way, the fifth airtight material 33 of the fifth airtight / insulating structure B5 is interposed between the upper end of the first airtight material 24 of the first airtight / insulating structure B1 and one side end of the second airtight material 27 of the second airtight / insulating structure B2.Furthermore, the protrusion 33a of the fifth airtight material 33 is adjacent to the upper end side of the first airtight material 24, and one side end of the second airtight material 27 is fitted into the fitting portion 33b of the fifth airtight material 33, so that a continuous airtight line is formed in this portion, and the airtightness and insulation between the first airtight / insulating structure B1 and the second airtight / insulating structure B2 are suitably ensured.

[0056] Therefore, the airtight / insulating structure B of the sash window A in this embodiment is provided with a first airtight / insulating structure B1 for ensuring airtightness and insulation in the vertical direction T2 in the extension direction of the joining frames 10d when the joining frames 10d of a pair of shoji screens 12, 13 are overlapped, and an airtight line R2 is formed on the inside of the room by a first resin material 21 attached to the joining frame 10d of the other shoji screen 13 of this first airtight / insulating structure B1 to form an insulating layer, and an elastically deformable first airtight material 24 attached to the joining frame 10d of one shoji screen 12 that abuts against the first resin material 21.

[0057] As a result, in the first airtight / insulating structure B1 of this embodiment, which is configured as described above, even if deformation such as thermal shrinkage occurs in the first resin material 21, when the pair of shoji screens 12, 13 are closed, the tip of the elastically deformable first airtight material 24 can always be in close contact with the first resin material 21, thereby ensuring airtightness and insulation.

[0058] Furthermore, in the first airtight / insulating structure B1 of this embodiment, the thickness of the first resin material 21 can be made thinner by abutting an elastically deformable first airtight material 24 against the first resin material 21 provided on the other joint frame 10d to ensure airtightness and insulation.

[0059] This allows the first resin material 21 (insulating layer) to be thinner while still maintaining the desired thermal insulation, and the width T3 of the joint frame 10d in the projection direction (depth direction) can be reduced, thereby improving the appearance of the joint frame 10d and ultimately the sash window A, and also reducing costs.

[0060] In addition, the airtight / insulating structure B of the sash window A of this embodiment is provided with a second airtight / insulating structure B2 to ensure airtightness and insulation between the upper frame 16 and the joint frame 10d and upper frame 10a, and this second airtight / insulating structure B2 forms a second airtight line R3 by a second airtight material 27 abutting the other joint frame 10d and upper frame 10a.

[0061] Furthermore, in the airtight / insulating structure B of the sash window A of this embodiment, the second airtight line R3 formed by the second airtight material 27 and the first airtight line R2 formed by the first airtight material 24 are formed at different positions in the projection direction T3, so these two airtight lines R2, R3 can effectively provide airtightness and thermal insulation. Therefore, it is possible to further improve airtightness and thermal insulation compared to conventional structures.

[0062] Furthermore, the airtight / insulating structure B of the sash window A of this embodiment is provided with a third airtight / insulating structure B3 for ensuring airtightness and thermal insulation between the sill 17 and the joint frame 10d and bottom frame 10b, and this third airtight / insulating structure B3, like the second airtight / insulating structure B2, forms a third airtight line R4 with the third airtight material 31 that abuts against the other joint frame 10d and bottom frame 10b. This allows the third airtight / insulating structure B3 to achieve the same effects as the second airtight / insulating structure B2.

[0063] In addition, by abutting the third airtight material 31 against the joining frame 10d and bottom frame 10b of the other shoji screen 13 to ensure airtightness and heat insulation, the dimension of the joining frame 10d in the projection direction T3 can be reduced compared to conventional methods. This makes it possible to further improve the appearance and reduce costs.

[0064] Furthermore, since two airtight lines R2 and R4 are formed at different positions (shifted positions), each airtight line R2 and R4 can exhibit airtightness and heat insulation individually, which makes it possible to further improve airtightness and heat insulation compared to conventional methods.

[0065] Furthermore, in the airtight / insulating structure B of the sash window A of this embodiment, a fourth airtight / insulating structure B4 is interposed between the first airtight / insulating structure B1 and the third airtight / insulating structure B3, and a fifth airtight / insulating structure B5 is interposed between the first airtight / insulating structure B1 and the second airtight / insulating structure B2, thereby connecting the airtight lines and ensuring optimal airtightness and insulation.

[0066] Since the fourth airtight material 32 of the fourth airtight / insulating structure B4 and the fifth airtight material 33 of the fifth airtight / insulating structure B5 each have protrusions 32a, 33a that are arranged adjacent to (side by side with) the first airtight material 24 of the first airtight / insulating structure B1, the joints between the first airtight material 24 and the fourth airtight material 32, and the fifth airtight material 33 do not become air passages (there are no air leaks), making it possible to further improve airtightness and insulation.

[0067] Furthermore, by providing the fourth airtight material 32 of the fourth airtight / insulating structure B4 and the fifth airtight material 33 of the fifth airtight / insulating structure B5, and by providing protrusions 32a, 33a adjacent to the first airtight material 24 of the first airtight / insulating structure B1, airtightness and insulation can be ensured even if thermal shrinkage occurs in the first airtight material 24, etc.

[0068] Furthermore, by providing a fourth airtight material 32 of the fourth airtight / insulating structure B4 and a fifth airtight material 33 of the fifth airtight / insulating structure B5, and further providing protrusions 32a, 33a adjacent to the first airtight material 24 of the first airtight / insulating structure B1, it becomes possible to form the joint frame 10d with a smaller visible width compared to conventional structures, thereby ensuring the desired airtightness and insulation.

[0069] Furthermore, if the fourth airtight material 32 of the fourth airtight / insulating structure B4 and the fifth airtight material 33 of the fifth airtight / insulating structure B5 are configured to abut against the first resin material 21 forming the insulating layer, together with the first airtight material 24 of the first airtight / insulating structure B1, in other words, if the first resin material 21 is formed with a large width in the viewing direction so that it abuts not only the first airtight material 24 but also the fourth airtight material 32 and the fifth airtight material 33, it becomes possible to further improve the airtightness and insulation properties.

[0070] The above describes one embodiment of the airtight / insulating structure for a sash window according to the present invention, but the present invention is not limited to the above embodiment and can be modified as appropriate within the scope of its intent.

[0071] For example, the fourth airtight / heat insulating structure B4 and the fifth airtight / heat insulating structure B5 may be made up of a plurality of members. 10 and 11, a resin material 35 with excellent thermal insulation properties may be attached to the intermediate rail / intermediate wall portion 20 of the upper frame 16 (lower frame 17) so as to protrude downward (upward) from the tip of the intermediate rail 20 in the protruding direction, and a fifth airtight material (airtight piece / upper filling airtight material) 33 may be provided in close contact with the tip of the resin material 35 in the protruding direction, the upper end (lower end) of the first airtight material 24, and the upper frames 10a of one shoji screen 12 and the other shoji screen 13, filling the upper space surrounded by these upper members, thereby forming a fifth airtight / insulating structure B5. Needless to say, a fourth airtight / insulating structure B4 can also be formed in a similar upside-down configuration.

[0072] In this way, the resin material 35 and the fifth airtight material 33 are filled in the space, thereby further improving the airtightness and heat insulation. In addition, by providing the fifth airtight material 33, the first airtight line R2 and the second airtight line R3 (third airtight line R4) can be connected as shown in Fig. 11.

[0073] Furthermore, by providing the resin material 35 and the fifth airtight material 33, new airtight lines can be formed at multiple locations where the fifth airtight material 33 abuts, such as the contact area between the resin material 35 and the fifth airtight material 33. Therefore, by providing a large fifth airtight material 33, it is possible to more reliably and effectively improve airtightness and heat insulation while keeping the joint frame 10d small.

[0074] Furthermore, as shown in Figure 10, it is possible that the position of the airtight line (dashed line) may change due to, for example, the first resin material 21 attached to the other shoji screen 13 being displaced due to construction errors, etc. However, by providing the fifth airtight material 33 together with the first airtight material 24, the airtight line in this area will not be displaced, making it possible to achieve highly reliable airtightness and insulation performance.

[0075] Furthermore, as shown in Figure 12, when the upper frame 16 (or lower frame 17) of the frame body 15 is configured with upper rails (or lower rails: intermediate wall portions) 20 that support the upper side (or lower end side) of each shoji screen 12, 13 so that they can slide, airtight material 36 can be attached to the upper frame 10a (or lower frame 10b) of each shoji screen 12, 13, and the tip portion can be pressed against the upper rail (or lower rail) 20 to form an airtight line.

[0076] In this embodiment, the first airtight material 24 is in close contact with the first resin material 21 of the other joint frame 10d, but it is also possible to abut the first airtight material 24 against the aluminum part (metal part) of the joint frame 10d. In this case, as in this embodiment, the airtight line is shifted, so the projection direction can be reduced. [Explanation of symbols]

[0077] 1 One side of the frame 2 The other side frame 3 Resin material 4 Smoke return 5. Drainer 10 Sash 10a Upper stile 10b Lower stile 10c Stiles 10d Joint frame 11 Glass Panel 12 One side of the shoji screen 13 The other shoji screen 15 Frame 16 Upper frame 17 Bottom frame 18 Door Rollers 20 Intermediate wall (intermediate rail, upper rail, lower rail) 21 First resin material (resin cover) 23 First engagement portion 24 First airtight material (side airtight material) 24a Engagement base end 24b Airtight / insulated body 25 Resin cover 26 Second engagement portion 27 Second airtight material 27a Engagement base end 27b Airtight / insulated body 30 third engagement portion 31 Third airtight material (lower airtight material) 31a Engagement base end 31b Airtight / insulated main body 32 Fourth Airtight Material 32a Protrusion 32b Fitting part 33 No. 5 Airtight Material 33a Protruding part (adjacent to airtight material) 33b Fitting part 35 Resin material 36 Airtight material 100 Traditional sash window A sash window B. Airtight / insulated structure B1 First airtight / insulated structure B2 Second airtight / insulated structure B3 Third airtight / insulated structure B4 4th airtight / insulated structure B5 5th airtight / insulated structure R1 Airtight Line R2 First airtight line R3 Second airtight line R4 3rd airtight line T1 width direction T2 Vertical direction T3 depth direction

Claims

1. A sash window comprising a plurality of sashes supported by a frame attached to an opening in a building, wherein at least one sash is supported by the frame so as to be slidable, The lower frame of the frame body has a horizontal piece, On the outdoor side of the aforementioned horizontal piece, the airtight material and the indoor facing surface of the outer sash are in contact. The horizontal piece extends toward the interior facing surface of the outer sash, A sash window in which the first cover portion is positioned above the horizontal piece and on the exterior side of the lower rail of the interior sash.

2. The sash window according to Claim 1, wherein a second cover portion is provided above the lower frame on the interior side of the lower rail of the inner sash.

3. The sash window according to claim 1, wherein the outer sash comprises a metal frame and a resin frame.

4. The sash window according to claim 1, wherein below the horizontal piece there is an intermediate wall portion to which the airtight material is attached.

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