Sash window

Abstract

To provide a sash-window airtight / thermal insulation structure capable of reducing the aspect width of a set frame while ensuring / improving the airtightness and the heat insulation performance.SOLUTION: The sash-window airtight / thermal insulation structure includes: in a state a pair of sashes 12 and 13 is closed and one set frame 10d of the neighboring sash 12 and the other set frame 10d of the other sash 13 are overlapped with each other in a depth direction T3, an airtight material 24 attached to a plane of the one set frame 10d; and a resin material 21 which is attached to other set frame 10d and comes into close contact with the airtight material.SELECTED DRAWING: Figure 1

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, including sliding windows, sash windows, fixed windows (fixed windows), single-opening windows, outward-opening windows, inward-tilting windows, folding windows, and pivoting windows, each with different opening and closing methods and functions.

[0003] Of these, sliding sash windows have a frame fixed to the outer periphery of the opening in a building, 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 of a rectangular frame made of an upper frame, a lower frame, and left and right vertical frames (one of the vertical frames is a joint frame) made of aluminum or resin shaped materials, and a glass panel placed inside the frame.

[0004] Each shoji screen has a guide groove with a concave cross section formed in the upper frame of the screen, which is engaged with an upper rail formed on the upper frame of the frame. 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 while being 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 frames and between the lower frames of one shoji screen and the other, and each shoji screen is arranged to be able to slide so as to be guided by these upper and lower intermediate rails.

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

[0007] Furthermore, there are designs in which a resin cover (resin material) is attached to the outside of the aluminum profile on the joint frame of one of the shoji screens to ensure insulation and airtightness, and when the pair of shoji screens are closed, the joint 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, generally, in sliding window sashes 100 in mid- to high-rise buildings, as shown in, for example, Figure 13, the abutment portion / airtight line R1 where the resin material 3 of one joint frame 1 abuts against the aluminum profile (aluminum portion) of the other joint frame 2 is located on the indoor side of the smoke guard 4, and a drip edge 5 is provided on the outdoor side of 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 portion / airtight line R1 where the resin material 3 of one joint frame 1 abuts against the aluminum profile (aluminum portion) of the other joint frame 2 is located on the outdoor side of the smoke deflector 4, and this airtight line (abutment portion) R1 is configured to also function as a water drain. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] JP 2007-51535 A Summary of the Invention [Problem to be solved by the invention]

[0011] However, in the conventional sliding window sashes described above, 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] In addition, as in the case of sliding window sashes in mid- to high-rise buildings, if the resin material is installed on the indoor side to place the airtight line on the indoor side and the resin material that constitutes the insulating layer is installed on the surface of the joint frame facing the indoor side, the visible width of the joint frame will become large to match the size of the resin material in order to obtain the desired insulating performance. This may lead to a deterioration in appearance (deterioration of design) and high costs.

[0013] Furthermore, if the abutment / airtight line where the plastic material of one frame joins the aluminum profile of the other frame is located on the outside of the room, as in the case of sliding window sashes in a house, 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 easy for condensation to form 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 makes it possible to reduce the visible width of the sash frame while ensuring / improving airtightness and insulation. [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 body attached to the outer periphery of an opening formed in a building, with at least one shoji screen supported on the frame body so that it can slide and open / close the opening, and is characterized in that the shoji screens comprise a frame having an upper frame, a lower frame, a vertical frame and a joint frame, and a glass panel whose outer periphery 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 with 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 with 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 to have an airtight piece interposed 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 for the airtight piece to have an airtight material adjacent portion adjacent to the airtight material.

[0018] Furthermore, in the airtight / thermal insulating structure of the sash window of the present invention, it is more preferable 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 downwardly and extends in the width direction between the depth direction of the upper sides of a pair of adjacent shoji screens, the lower frame of the frame body has an intermediate wall portion that protrudes upwardly and extends in the width direction between the depth direction of the lower sides of a pair of adjacent shoji screens, another airtight material is attached to the intermediate wall portion of the upper frame and / or the lower frame and is in close contact with one of the joint frames, and 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. Effect of the Invention

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

[0021] [Figure 1] 1 is a cross-sectional view showing an airtight / insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Diagram 2] 1 is a vertical cross-sectional view showing a sliding window sash (sash window) with an airtight / thermal insulating structure according to one embodiment of the present invention. [Diagram 3] FIG. 2 is an enlarged view of a portion S1 in FIG. 1, and is a cross-sectional view showing the airtight / thermal insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 4]FIG. 3 is an enlarged view of the S2 portion of FIG. 2, and is a vertical cross-sectional view showing the airtight / thermal insulating structure of the upper portion of the sliding window sash (sash window) according to one embodiment of the present invention. [Diagram 5] FIG. 3 is an enlarged view of a portion S3 in FIG. 2, and is a vertical cross-sectional view showing the airtight / thermal insulating structure of the lower part of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 6] FIG. 11 is a perspective view showing a fourth airtight / thermal insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 7] FIG. 11 is a perspective view showing a fourth airtight / thermal insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 8] 1 is a cross-sectional view showing a fourth airtight / insulating structure and a fifth airtight / insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. FIG. [Figure 9] FIG. 11 is a perspective view showing a fifth airtight / thermal insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 10] FIG. 11 is a vertical cross-sectional view showing a modified example of the fifth airtight / thermal insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 11] FIG. 11 is a vertical cross-sectional view showing a modified example of the fifth airtight / thermal insulating structure of a sliding window sash (sash window) according to one embodiment of the present invention. [Figure 12] FIG. 11 is a vertical cross-sectional view showing a modified example of the airtight / thermal 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 PREFERRED EMBODIMENTS

[0022] Hereinafter, an airtight / thermal 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 being a sliding window, however, 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 sash 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 of the other vertical frame, and a glass panel (shoji main body) 11 whose outer peripheral edge is held by the frame 10 to form the window surface.

[0025] The frame 10 is formed of a hollow structure using an aluminum profile (aluminum portion) or a resin profile. Each frame 10 (10a, 10b, 10c, 10d) is formed with a fitting recess formed between a pair of side walls on the inner periphery, and is configured to engage and hold the outer periphery edge of the glass panel 11 in the fitting recess.

[0026] As shown in Figures 2, 4, and 5, each of the shoji screens 12 and 13 is arranged with the upper frame 10a engaged with an engagement recess provided in the upper frame 16 of the frame body 15. The lower frame 10b is provided with an engagement recess with a concave cross section that opens downwards and a door roller 18 housed in the engagement recess, and the engagement recess and the door roller 18 are engaged with a lower rail provided on the lower frame 17 of the frame body 15 so as to protrude upward. 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 an intermediate wall portion (intermediate rail) 20 that is arranged between the upper frames 10a and between the lower frames 10b of one shoji screen 12 and the other shoji screen 13, and each shoji screen 12, 13 is arranged to be able to slide while being 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, 13 are provided with smoke deflectors 4 with an L-shaped cross section, and when the shoji screens 12, 13 are closed, the joining frames 10d overlap and the smoke deflectors 4 engage with each other.

[0029] On the other hand, in the sliding window sash A of this embodiment, the sliding screens 12, 13 are closed so that their fitting frames 10d overlap, and the window sash A is provided with an airtight / insulating structure B for ensuring 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 is intended to ensure airtightness and insulation in the vertical direction T2 in the extension direction of the joint frame 10d when the joint frames 10d of a pair of shoji screens 12, 13 overlap, as shown in Figures 1, 2 and 3. The second airtight / insulating structure B2 is intended to ensure airtightness and insulation between the upper frame 16 and the joint frame 10d and upper frame 10a, as shown in Figures 2 and 4 (Figures 1 and 3). The third airtight / insulating structure B3 is intended to ensure airtightness and insulation between the lower frame 17 and the joint frame 10d and lower frame 10b, as shown in Figures 2 and 5 (Figures 1 and 3). In addition, the fourth airtight / insulating structure B4 is intended to ensure airtightness and insulation between the first airtight / insulating structure B1 and the third airtight / insulating structure B3, as shown in Figures 6 to 9, and the fifth airtight / insulating structure B5 is intended to ensure airtightness and 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 / insulated structure B1 of this embodiment is configured to include a first resin material (resin cover) 21 that is provided on the surface (part) of the joint frame 10d of one shoji screen 13 that faces the joint 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 engagement portion 23 extending in the vertical direction T2 formed on the surface (aluminum part) of the joint frame 10d of one shoji screen 12 that faces the joint frame 10d of the other shoji screen 13 and is configured to be in close contact with the first resin material 21 of the other joint frame 10d.

[0033] The first airtight material 24 is formed with an engagement base end 24a for detachably engaging with the first engagement 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 engagement base end 24a toward the first resin material 21 of the other joint frame 10d when the engagement base end 24a is engaged with the first engagement portion 23, and has an airtight / insulating main body portion 24b 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 shape in 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 side surfaces on the indoor side, excluding the surface on which the first airtight material 24 and the smoke deflector 4 are provided. Also, 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 / insulated 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 of the shoji screens 12 abutting this first resin material 21.

[0037] Next, the second airtight / insulated structure B2 of this embodiment for ensuring 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 (middle 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 engagement base end 27a for removably engaging with the second engagement 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 portion is in close contact with the upper frame 10a of the other shoji screen 13 from the engagement base end 27a when the engagement base end 27a is engaged with the second engagement portion 26.

[0039] The second airtight material 27 is made of resin and is formed to be elastically deformable, and is formed to have a predetermined length in the lateral direction reaching 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 a substantially 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 / insulating structure B2 of this embodiment forms a second airtight line R3 on the indoor side by the second airtight material 27 abutting 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 for ensuring airtightness and insulation between the bottom frame 17 and the joint frame 10d and the bottom frame 10b, is roughly configured as an upside-down 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] The third airtight material 31, like the first airtight material 24 and the second airtight material 27, is formed with an engagement base end 31a for removably engaging with the third engagement 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 portion is in close contact with the bottom frame 10b of the other shoji screen 13 from the engagement base end 31a when the engagement base end 31a is engaged with the third engagement portion 30.

[0046] The third airtight material 31 is made of resin and is formed to be elastically deformable, and is formed with a predetermined length in the lateral direction reaching approximately both ends in the width direction T1 of the lower frame 17. Furthermore, like 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 side of the airtight / insulating main body part 31b has a convex arc-shaped cross section, and the engaging base end part 31a is formed in a substantially flat plate shape.

[0047] In the third airtight / insulating structure B3, the tip of the airtight / insulating main body portion 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, the third airtight / insulating structure B3 of this embodiment forms a third airtight line R4 on the indoor side by the third airtight material 31 abutting the bottom frame 10b of the other shoji screen 13.

[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 / thermal insulation structure B1 and the third airtight / thermal insulation 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 / thermal insulation 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 / thermal insulation 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, and further, 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 engaged with the engaging portion 32b of the fourth airtight material 32, thereby forming a series of airtight lines in this portion and ensuring optimal airtightness and insulation between the first airtight / insulating structure B1 and the third airtight / insulating structure B3.

[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] The fifth airtight material 33 is provided to connect the airtight lines formed by the first airtight / insulating structure B1 and the second airtight / insulating structure B2, similarly to the fourth airtight material 32. The fifth airtight material 33 of this embodiment is provided 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 engaged with the engaging portion 33b of the fifth airtight material 33, thereby forming a series of airtight lines in this portion and ensuring optimal airtightness and insulation between the first airtight / insulating structure B1 and the second airtight / insulating structure B2.

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

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

[0058] Furthermore, in the first airtight / insulated structure B1 of this embodiment, the thickness of the first resin material 21 can be made thin by abutting the 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 (insulation layer) to be made thinner while still maintaining the desired thermal insulation, and the width of the joint frame 10d in the projection direction (depth direction) T3 can be reduced. This improves the appearance of the joint frame 10d and therefore the sash window A, while also reducing costs.

[0060] In addition, the airtight / insulating structure B of the sash window A in 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 that these two airtight lines R2, R3 can effectively exhibit airtightness and thermal insulation. Therefore, it is possible to further improve airtightness and thermal insulation compared to the conventional art.

[0062] 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 the bottom frame 10b, and this third airtight / insulating structure B3 forms a third airtight line R4 by the third airtight material 31 that abuts against the other joint frame 10d and bottom frame 10b, just like the second airtight / insulating structure B2. This allows the third airtight / insulating structure B3 to provide the same effect as the second airtight / insulating structure B2.

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

[0064] In addition, since two airtight lines R2 and R4 are formed at different positions (shifted positions), each of the airtight lines R2 and R4 can exhibit airtightness and heat insulation individually. Therefore, it is possible to further improve airtightness and heat insulation compared to the conventional method.

[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 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 the 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 further 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, a configuration is formed in which the desired airtightness and insulation are ensured, it becomes possible to form the joint frame 10d with a smaller visible width compared to the conventional configuration.

[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 as to abut not only the first airtight material 24 but also the fourth airtight material 32 and the fifth airtight material 33, it is possible to further improve the airtightness and insulation.

[0070] The above describes one embodiment of the airtight / insulating structure of 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 without departing from the spirit of the present invention.

[0071] For example, the fourth airtight / insulating structure B4 and the fifth airtight / insulating structure B5 may be formed of a plurality of members. For example, as shown in Figures 10 and 11, a resin material 35 with excellent heat insulation properties may be attached to the middle rail / middle wall portion 20 of the upper frame 16 (lower frame 17) so as to protrude downward (upward) from the tip of the middle rail 20 in the protruding direction, and a fifth airtight material (airtight piece / upper filling airtight material) 33 may be provided so as to fill the upper space surrounded by these upper members, thereby forming a fifth airtight / insulating structure B5. It goes without saying that a fourth airtight / insulating structure B4 can be formed in a similar upside-down form.

[0072] In this way, the resin material 35 and the fifth airtight material 33 are filled in the space, thereby making it possible to further improve 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 (the third airtight line R4) can be connected as shown in FIG.

[0073] Furthermore, by providing the resin material 35 and the fifth airtight material 33, new airtight lines can be formed at a plurality of locations where the fifth airtight material 33 abuts, such as the abutting portion 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] Also, as shown in Figure 10, it is possible that the first resin material 21 attached to the other shoji screen 13 may shift in position due to construction errors, etc., which may change the position of the airtight line (dashed line). However, by providing the fifth airtight material 33 together with the first airtight material 24, the airtight line in this area will not shift, 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 an upper rail (or lower rail: intermediate wall portion) 20 that supports 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 adhered to 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 fitting frame 3. Resin material 4. Smoke Return 5. Drainer 10 Frame (sash) 10a Upper stile 10b Lower stile 10c Stiles 10d. Assembled 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 Carriage 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 body 32 Fourth Airtight Material 32a Protrusion 32b Fitting part 33 5th Airtight Material 33a Protruding part (adjacent to airtight material) 33b Fitting part 35 Resin material 36 Airtight materials 100 Conventional sash window A Sash window B Airtight / insulated structure B1 First airtight / insulated structure B2 Second airtight / insulated structure B3 3rd 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 shoji screens supported by a frame attached to an opening of a building, at least one of the shoji screens being supported by the frame so as to be slidable thereon, The lower frame of the frame body has a horizontal piece, The outer screen has a metal frame and a resin frame. On the exterior side of the horizontal piece, the airtight material is in contact with the interior facing surface of the metal frame of the exterior screen, The horizontal piece extends toward the interior facing surface of the metal frame of the outer sash, A sash window in which the interior-facing visible surface of the plastic frame of the exterior screen is positioned closer to the interior than the interior-facing surface of the metal frame of the exterior screen.

2. A sash window comprising a plurality of shoji screens supported by a frame attached to an opening of a building, at least one of the shoji screens being supported by the frame so as to be slidable thereon, The lower frame of the frame body has a horizontal piece, The outer screen has a metal frame and a resin frame. On the exterior side of the horizontal piece, the airtight material is in contact with the interior facing surface of the metal frame of the exterior screen, The horizontal piece extends toward the interior facing surface of the metal frame of the outer sash, A first cover part is disposed above the horizontal piece at a position overlapping with the resin frame of the outer screen along the viewing direction, A hollow portion is formed between the first cover portion and the lower frame, A sash window, wherein the hollow portion is formed above the horizontal piece.

3. A sash window comprising a plurality of shoji screens supported by a frame attached to an opening of a building, at least one of the shoji screens being supported by the frame so as to be slidable thereon, The lower frame of the frame body has a horizontal piece, The outer screen has a metal frame and a resin frame. On the exterior side of the horizontal piece, the airtight material is in contact with the interior facing surface of the metal frame of the exterior screen, The horizontal piece extends toward the interior facing surface of the metal frame of the outer sash, A sash window in which a first cover part is arranged above the horizontal piece and on the outside of the lower rail of the inner sash.

4. 3. A sash window as described in claim 2, wherein the first cover portion is arranged above the horizontal piece in a position overlapping along the visible direction with the interior-facing visible surface of the plastic frame of the outer sash.

5. 4. A sash window as claimed in claim 2 or 3, wherein a second cover portion is arranged above the lower frame on the interior side of the lower rail of the inner sash.

6. 6. A sash window as claimed in claim 5, wherein the first cover portion and the second cover portion are integrally formed.

7. The first cover portion is provided to face the outdoor side surface of the lower rail, The sash window according to claim 5 , wherein the second cover portion is provided so as to face an interior side surface of the lower rail.

8. A sash window as claimed in claim 2 or 3, further comprising a protrusion extending from the exterior end of the first cover portion towards the exterior screen.

9. A sash window as described in any one of claims 1 to 3, wherein the lower end of the plastic frame of the outer sash is positioned above the horizontal piece of the bottom frame.

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