Ventilation structure and window unit

Abstract

To provide a ventilation structure and a window unit which can further easily introduce cool air from outdoor into a room.SOLUTION: A window unit 100 is installed to an opening 301 provided in a wall 30 of a building 300. With such a configuration, a place where air can flow can be secured in the wall 30 other than a window 200. Therefore, in comparison with a case where air flows only through a small ventilation window installed to the window 200, it is easier to introduce cool air from outdoor. In addition, a surface material 120A does not need to have a frame. In this case, the configuration of the surface material 120A can be simplified, and the effort and cost of manufacturing the surface material 120A and therefore the window unit 100 can be further reduced. In addition, a frame body 110 may be fixed directly to the wall 30. In this case, the material cost and the effort required for construction can be reduced.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a ventilation structure and a window unit. [Background technology]

[0002] In buildings such as houses, if the room temperature could be lowered by introducing cool air from outside without using air conditioners, it would be beneficial in terms of reducing energy consumption. Conventionally, windows with small ventilation windows attached to a paper screen have been known (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-064741 A Summary of the Invention [Problem to be solved by the invention]

[0004] As in Patent Document 1, if a window is equipped with a small window for ventilation, a certain amount of cool air can be introduced from outdoors into the room by opening the small window. However, for example, if a building has few windows with small windows or if the windows with small windows are not installed in suitable locations, it may be difficult to achieve the effect of lowering the room temperature by only opening the small window.

[0005] In view of the above-mentioned circumstances, one object of the present invention is to provide a ventilation structure and a window unit that can more easily introduce cool air from the outdoors into the rooms. [Means for solving the problem]

[0006] The ventilation structure of the present invention comprises a wall body having an opening, a frame body attached to the opening and consisting of two vertical frames and two horizontal frames arranged all around, and a window unit having at least one first shoji screen attached to the frame body and movable along the two horizontal frames, wherein the window unit is configured so that it can be incorporated as a small ventilation window into a second shoji screen which has a larger vertical dimension than the first shoji screen. Effect of the Invention

[0007] According to the present invention, by attaching a window unit to an opening in a wall, a place in the wall where air can flow other than through the window can be secured. Therefore, it is easier to introduce cool air from outdoors than when air flows only through a small ventilation window attached to the window. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of a ventilation structure according to an embodiment of the present invention, viewed from the outdoor side. FIG. [Diagram 2] 1 is a floor plan showing the change in ventilation conditions when a ventilation structure according to an embodiment of the present invention is introduced into a building. [Diagram 3] 2 is an enlarged front view showing a portion of the wall shown in FIG. 1 where a window unit is provided. FIG. [Figure 4] FIG. 4 is a vertical cross-sectional view of the window unit taken along the line IV-IV in FIG. 3. [Diagram 5] FIG. 4 is a cross-sectional view of the window unit at position VV in FIG. 3. [Figure 6] 1 is a cross-sectional view of a ventilation structure according to a first embodiment of the present invention. [Figure 7] FIG. 1 is a diagram showing a fixture having a window unit according to an embodiment of the present invention, as viewed from the outside of the room. [Figure 8] FIG. 8 is a vertical cross-sectional view of a sash taken along the line VIII-VIII in FIG. 7. [Figure 9] FIG. 9 is a cross-sectional view of the sash at position IX-IX in FIG. 7. [Figure 10] FIG. 4 is a cross-sectional view of a ventilation structure according to a second embodiment of the present invention. [Figure 11]FIG. 4 is a cross-sectional view of a ventilation structure according to a third embodiment of the present invention. [Figure 12] FIG. 11 is a cross-sectional view of a ventilation structure according to a fourth embodiment of the present invention. [Figure 13] FIG. 13 is a diagram showing a fitting having a window unit according to a fifth embodiment of the present invention, as viewed from the outside of the room. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. For convenience, the terms "visible direction" and "visible direction" may be used below. The "visible direction" is the direction along the depth of the fitting, and may also be referred to as the indoor / outdoor direction. A surface along the visible direction may be referred to as a "visible surface." For members that extend along the lateral direction (left-right direction, horizontal direction) such as the upper and lower frames, the visible direction is the direction along the top and bottom perpendicular to the visible direction. For members that extend along the vertical direction (up-down direction) such as the vertical frame, the visible direction is the direction along the horizontal perpendicular to the visible direction. In addition, a surface along the visible direction may be referred to as a "visible surface."

[0010] (First embodiment) (wall) As shown in Fig. 1, the window unit 100 of this embodiment is provided in an opening 301 of a wall body 30. Although Figs. 1, 3 to 6 illustrate an example in which the window unit 100 is provided in a wall body 31 that separates the inside of a room (indoors) from the outside of a room (outdoors), the window unit 100 can also be provided in a wall body 32 (see Fig. 2) that separates one room 33 from another room 33 indoors. In addition, the outdoors as referred to in this specification also includes a common corridor 34 (see Fig. 2). The window 200 (see Figs. 2 and 7) is a window with a relatively large vertical dimension, and is a window of a size that allows a small ventilation window (window unit 100) to be incorporated into a paper screen, such as a window of a size that allows people to enter and exit.

[0011] 2 (before installation), in a building 300 before the installation of the window unit 100, there are few windows 200 and the locations for installing the windows 200 are limited, so that even if the windows 200 are opened, it is difficult to introduce cool air from outdoors. Even if the building 300 is capable of introducing cool air from outdoors by opening the windows 200, it may be difficult to keep the windows 200 open from a crime prevention perspective.

[0012] Therefore, in this embodiment, as shown on the right side of Fig. 2 (after construction), multiple window units 100 are constructed on the walls 31, 32 (30) of the building 300. Also, the paper screen of the window 200 (see Fig. 7) may be changed to one with a window unit 100. In this case, the multiple window units 100 are arranged so that an air flow is formed from the outdoors (one side of the building 300) through the indoors (in at least one or more rooms 33) to the outdoors (the other side of the building 300). As a result, by opening the paper screens of the multiple window units 100, an air flow A is formed as indicated by the dashed arrow in Fig. 2, and the room 33 can be cooled by the cold air introduced from the outdoors.

[0013] (Window unit configuration and incorporation into shoji screen) The window unit 100 can be used mainly for ventilation, and may also be referred to as a ventilation small window unit. As shown in Fig. 3, the window unit 100 is attached to an opening 301 in a wall body 30 (see Fig. 6).

[0014] The window unit 100 has a frame body 110, two panel members 120A and 120B, and a screen door 130. The panel member 120A is supported by the frame body 110 so as to be slidable laterally, and an opening through which air flows is formed inside the frame body 110 by sliding the panel member 120A to the right. In this embodiment, the window unit 100 is configured as a single sliding window in which only the panel member 120A slides and the panel member 120B does not slide, as an example, but the window unit 100 may be a sliding window in which the panel members 120A and 120B slide. In addition, the window unit 100 in FIG. 3 is provided with a screen door 130, but the screen door 130 is not essential.

[0015] The upper frame 113 extends in the horizontal direction (longitudinal direction) with a cross-sectional shape shown in FIG. 4. The upper frame 113 is an extruded shape material. The upper frame 113 has an outer accommodating portion 110a and an inner accommodating portion 110b that form an open cross section open to the inner circumferential side. The inner accommodating portion 110b is adjacent to the indoor side of the outer accommodating portion 110a. The outer accommodating portion 110a and the inner accommodating portion 110b each form a groove that is open to the inner circumferential side, recessed to the outer circumferential side, and extends in the horizontal direction (longitudinal direction). The upper frame 113 has a closed cross-sectional portion 110c located on the outer circumferential side of the outer accommodating portion 110a and the inner accommodating portion 110b. The upper frame 113 also has an outer peripheral wall 110e, an outer wall 110f, an inner wall 110g, a middle wall 110h, and a partition wall 110i. The outer peripheral wall 110e extends in the horizontal direction with a predetermined width in the projection direction. The outer wall 110f extends laterally with a predetermined width in the find direction. The inner wall 110g has a crank-shaped cross-sectional shape in which the outer peripheral side portion and the inner peripheral side portion are connected by an extension portion of the middle wall 110h toward the inside of the room. The outer peripheral side portion and the inner peripheral side portion each extend laterally with a predetermined width in the find direction. The middle wall 110h extends laterally with a predetermined width in the find direction between the outer wall 110f and the inner wall 110g at the middle position in the find direction of the upper frame 113. The partition wall 110i separates the outer storage section 110a and the inner storage section 110b, and extends laterally with a predetermined width in the find direction. Furthermore, the upper frame 113 has two protruding walls 110d protruding from the outer peripheral wall 110e to the outer periphery side. The two protruding walls 110d are provided apart from each other in the find direction, and each extends laterally with a predetermined width in the find direction.

[0016] The lower frame 114 extends laterally with a cross-sectional shape shown in FIG. 4. The lower frame 114 is an extruded member. The lower frame 114 has a cross-sectional shape that is substantially the same as that of the upper frame 113, although the detailed shapes of each part are different. That is, the lower frame 114 has an outer storage section 110a, an inner storage section 110b, and a closed cross-sectional section 110c, as well as an outer peripheral wall 110e, an outer wall 110f, an inner wall 110g, a middle wall 110h, and a partition wall 110i. However, the outer wall 110f has a cross-sectional shape bent in a crank shape, and the width of the closed cross-sectional section 110c in the projection direction is narrower than that of the upper frame 113. In addition, the lower frame 114 has two protruding walls 110m protruding from the outer peripheral wall 110e to the outer periphery side, instead of the two protruding walls 110d. The two projecting walls 110m are spaced apart from each other in the projection direction and each extends laterally with a predetermined width in the projection direction.

[0017] In the cross-sectional position of FIG. 4, the upper edge of the screen door 130 is accommodated in the outer storage section 110a of the upper frame 113, and the lower edge of the screen door 130 is accommodated in the outer storage section 110a of the lower frame 114. The screen door 130 is accommodated between the upper frame 113 and the lower frame 114. The screen door 130 has a connecting part 131, a frame member 132, and a mesh member 133. In addition, an abutment portion 110j is provided on the outdoor side of the partition wall 110i. The abutment portion 110j constitutes a part of the outdoor storage section 110a. The screen door 130 is attached to the frame body 110 with the indoor facing surface of the frame member 132 abutting against the abutment portion 110j.

[0018] 4, the upper edge of the face material 120A is accommodated in the inner accommodation portion 110b of the upper frame 113, and the lower edge of the face material 120A is accommodated in the inner accommodation portion 110b of the lower frame 114. The face material 120A is accommodated between the upper frame 113 and the lower frame 114 so as to be slidable laterally. A holding portion 110k that holds the seal member 140 is provided on the indoor side of the partition wall 110i. The face material 120A is supported by the frame body 110 so as to be slidable laterally, with the outdoor surfaces of the upper and lower edge portions of the face material 120A abutting against the seal member 140.

[0019] The surface materials 120A and 120B are frameless surface materials. The surface materials 120A and 120B are made of, for example, a colorless and transparent material. The surface materials 120A and 120B are made of, for example, a resin material, but may be made of other materials such as glass or metal materials. Note that when the surface materials 120A and 120B are made of a resin material, they may be made of a colored material so that discoloration due to ultraviolet rays is not noticeable. The surface materials 120A and 120B are an example of a shoji screen, and the surface material 120A is an example of a first shoji screen.

[0020] The vertical frames 111 and 112 extend in the vertical direction (longitudinal direction) with a cross-sectional shape shown in FIG. 5. Since the vertical frames 111 and 112 have the same cross-sectional shape, only the vertical frame 111 will be described below with respect to the overlapping portions. The vertical frame 111 is an extruded shape material. The vertical frame 111 has a groove-shaped outer storage section 110a and an inner storage section 110b extending in the longitudinal direction, similar to the upper frame 113 and the lower frame 114. However, the vertical frame 111 does not have a closed cross-sectional section 110c and a middle wall 110h like the upper frame 113 and the lower frame 114. That is, the vertical frame 111 has an outer peripheral wall 110e, an outer wall 110f, an inner wall 110g, and a partition wall 110i. The vertical frame 111 also has two protruding walls 110d, similar to the upper frame 113 and the lower frame 114. Furthermore, the partition wall 110i is provided with abutting portions 110j and holding portions 110k similar to those of the upper frame 113 and the lower frame 114.

[0021] In the vertical frame 111, the outer storage section 110a stores the left edge of the screen door 130, and the inner storage section 110b stores the left edge of the panel 120A in the closed position. The abutment between the abutment section 110j and the screen door 130, and the abutment between the seal member 140 held by the holding section 110k and the panel 120A are similar to those of the upper frame 113 and the lower frame 114. On the other hand, in the vertical frame 112, the outer storage section 110a stores the right edge of the panel 120B, and the inner storage section 110b stores the right edge (not shown) of the panel 120A in the open position. A seal member 141 is interposed between the abutment section 110j facing the outer storage section 110a of the vertical frame 112 and the panel 120B. Further, an abutment member 150 that abuts against a lateral edge of the panel 120A is housed in the inner housing portion 110b of the vertical frames 111, 112. The abutment member 150 has a cushioning function when the panel 120A moves to the closed position or the open position.

[0022] As shown in FIG. 3, the middle rib 115 extends between the horizontal center position of the upper frame 113 and the horizontal center position of the lower frame 114. The middle rib 115 extends vertically (longitudinal direction) with a cross-sectional shape shown in FIG. 5. The middle rib 115 has a closed cross-sectional portion 110c and two outer storage portions 110a adjacent to the left and right sides of the closed cross-sectional portion 110c. The outer storage portion 110a adjacent to the left of the closed cross-sectional portion 110c has a groove-like shape that opens toward the vertical frame 111. The outer storage portion 110a stores the right edge of the screen door 130, and the side wall 110o on the indoor side of the outer storage portion 110a is provided with an abutment portion 110j that abuts against the screen door 130. On the other hand, the outer storage portion 110a adjacent to the right of the closed cross-sectional portion 110c has a groove-like shape that opens toward the vertical frame 112. The outer accommodating section 110a accommodates the left edge of the face material 120B, and a contact portion 110j is provided on a side wall 110o on the indoor side of the outer accommodating section 110a. A seal member 141 is interposed between the contact portion 110j and the face material 120B.

[0023] 5, a locking mechanism 160 that locks the panel 120A in the closed position is provided at the horizontal center position of the lower frame 114. The locking mechanism 160 can be switched between a locked state in which the panel 120A is locked in the closed position and an unlocked state in which the locked state is released.

[0024] (Installing the window unit on the wall) As shown in FIG. 6, the wall body 30 has a wall main body 30a and a plate-shaped mounting material 30b. In this embodiment, the frame body 110 of the window unit 100 is accommodated on the inner periphery side of an opening 301 having a rectangular cross section provided in the wall body 30. The frame body 110 and the inner periphery surface 301a of the opening 301 are joined by a sealing material 35, so that the window unit 100 is fixed to the wall body 30. That is, in this embodiment, the window unit 100 is fixed directly to the wall body 30 without using any mounting member or the like. The gap and boundary between the frame body 110 and the inner periphery surface 301a are covered and hidden by the mounting material 30b and the sealing material 35.

[0025] (Incorporating it into a window as a ventilation aperture) The window unit 100 of this embodiment can also be applied to a small ventilation window for a window 200. Fig. 7 shows a window 200 as a fixture including the window unit 100 according to an embodiment of the present invention. The window 200 illustrated here is a so-called sliding window that includes a frame 10, an inner screen 20A disposed on the interior side of the frame 10, and an outer screen 20B disposed on the interior side of the frame 10. The frame 10 is configured into a rectangular frame shape by assembling left and right vertical frames 11, 12, an upper frame 13, and a lower frame 14 all around.

[0026] The inner screen 20A is configured with a rectangular surface material 21A and vertical frames 22A, upper frames 23A, lower frames 24A, and vertical frames 25A arranged around the four sides of the surface material 21A. Similarly, the outer screen 20B is configured with a rectangular surface material 21B and vertical frames 22B, upper frames 23B, lower frames 24B, and vertical frames 25B arranged around the four sides of the surface material 21B. In this embodiment, the inner screen 20A and the outer screen 20B are arranged to be movable along the longitudinal direction of the upper frame 13 and the lower frame 14 relative to the frame body 10, and when the inner screen 20A is arranged on the left side of the frame body 10 and the outer screen 20B is arranged on the right side when viewed from the outside of the room, the opening of the frame body 10 can be closed. When the opening of the frame body 10 is closed, the vertical frame 25A located on the right side of the inner screen 20A and the vertical frame 25B located on the left side of the outer screen 20B are aligned in the front direction when viewed from the outside of the room. On the other hand, when the opening of the frame body 10 is open, the inner screen 20A and the outer screen 20B are at least partially overlapping in the front direction. In the following, the vertical frames 25A and 25B are also referred to as the aligned frame portion.

[0027] The vertical frames 22A, 22B, upper frames 23A, 23B, lower frames 24A, 24B, and joint frames 25A, 25B that constitute the inner screen 20A and the outer screen 20B are made from extruded material and are each configured to have a cross-sectional shape that is approximately uniform along their entire longitudinal length.

[0028] On the other hand, the vertical frames 11, 12, upper frame 13, and lower frame 14 that make up the frame 10 are made of extruded material and are configured to have a cross-sectional shape that is approximately uniform over the entire length along the longitudinal direction. Each member that makes up the vertical frames 11, 12, upper frame 13, and lower frame 14 is attached to the building framework or a frame fixed to the framework via mounting screws (not shown).

[0029] The window unit 100 is attached to the inner sash 20A surrounded by the vertical frame 22A, the upper frame 23A, the vertical frame 25A, and the panel 21A. The window unit 100 has a frame body 110. The frame body 110 includes vertical frames 111, 112, an upper frame 113, a lower frame 114, and a center rib 115. The window unit 100 is assembled into the inner sash 20A by fixing the frame body 110 to any of the vertical frame 22A, the upper frame 23A, and the vertical frame 25A. The upper frame 113 and the lower frame 114 may also be referred to as horizontal frames.

[0030] In this embodiment, as an example, the longitudinal ends of the upper frame 113 and the lower frame 114 are fixed to the vertical frames 22A and 25A by mounting screws (not shown) extending laterally. The upper frame 113 is adjacent to the lower side of the upper frame 23A and extends laterally along the upper frame 23A. The lower frame 114 extends laterally between the upper frame 23A and the lower frame 24A (see FIG. 7). In this case, the lower frame 114 forms part of the framework of the inner screen 20A and also functions as the horizontal rail 26 of the inner screen 20A that supports the upper edge of the panel 21A.

[0031] As shown in FIG. 8, a slit-shaped opening 20a1 is provided in the inner peripheral wall 20a of the upper frame 23A of the inner sash 20A. Two protruding walls 110d provided on the upper frame 113 of the window unit 100 are inserted into the opening 20a1. The opening width in the indoor / outdoor direction of the opening 20a1 is set to a width in which the two protruding walls 110d are inserted. In other words, the opening width is set to be longer than the distance between the outdoor surface of the outdoor protruding wall 110d and the indoor surface of the indoor protruding wall 110d. The two protruding walls 110d are an example of an engaging portion that engages with the opening 20a1. The opening 20a1 is an example of an engaged portion.

[0032] On the other hand, the packing 21a provided on the upper edge of the face material 21A is inserted between two protruding walls 110m provided on the bottom frame 114 of the window unit 100. The opening width between the tips of the two protruding walls 110m in the indoor / outdoor direction is set to a width that allows the tip 21a2 (inserted portion) of the packing 21a to be inserted but not the base portion 21a1 of the packing 21a to be inserted. In other words, the opening width is set to be larger than the width of the tip 21a2 and smaller than the width of the base portion 21a1. The two protruding walls 110m are an example of an engaging portion that engages with the face material 21A to which the packing 21a is attached. The face material 21A to which the packing 21a is attached is an example of an engaged portion.

[0033] As shown in Fig. 9, the inner peripheral wall 20a of the vertical frame 22A, 25A of the inner sash 20A is provided with a slit-shaped opening 20a1. Two protruding walls 110d provided on the vertical frame 111 of the window unit 100 are inserted into the opening 20a1 of the vertical frame 22A. Two protruding walls 110d provided on the vertical frame 112 of the window unit 100 are inserted into the opening 20a1 of the vertical frame 25A. The opening width of the opening 20a1 in the indoor / outdoor direction is set to a width in which the two protruding walls 110d are inserted. In other words, the opening width is set to be longer than the distance between the outdoor surface of the outdoor protruding wall 110d and the indoor surface of the indoor protruding wall 110d.

[0034] In this way, the window unit 100 is attached to the inner door 20A in a state where it is surrounded by the vertical frame 22A, the upper frame 23A, the vertical frame 25A, and the surface material 21A at the upper part of the inner door 20A. In the example of Figs. 7 to 9, an engaged portion is provided on the inner peripheral portion formed by the vertical frame 22A, the upper frame 23A, the vertical frame 25A, and the surface material 21A, and an engaging portion provided on the outer peripheral portion of the frame body 110 of the window unit 100 engages with the engaged portion. Note that the window unit 100 may be attached to the inner door 20A of a window 200 other than the window 200 provided in the same building 300. The inner door 20A is an example of a second door having a larger vertical dimension than the surface material 120A (first door).

[0035] As described above, in the ventilation structure of the present embodiment, the window unit 100 is attached to the opening 301 provided in the wall 30 of the building 300. According to this configuration, it is possible to secure a place other than the window 200 where air can flow through the opening 301 of the wall body 30. Therefore, compared to a case where air flows only through the small ventilation window attached to the window 200, it is easier to introduce cool air from outdoors.

[0036] Furthermore, in this embodiment, the panel 120A (paper screen) does not have a frame. According to this configuration, the configuration of the surface material 120A can be simplified, and the effort and cost required to manufacture the surface material 120A, and therefore the window unit 100, can be further reduced.

[0037] In this embodiment, the frame 110 is fixed directly to the wall 30 . According to this configuration, the window unit 100 can be more easily attached to the opening 301 of the wall body 30 with a simpler configuration. This provides advantages such as reducing the material costs required for construction, reducing the labor required for construction, and shortening the time required for construction.

[0038] Furthermore, in this embodiment, the window unit 100 is configured not only to be attached to the wall body 30, but also to be able to be incorporated as a small ventilation window into the window 200. That is, the frame body 110 has an engaging portion that engages with an engaged portion provided on the frame or face material 21A of the inner shoji 20A (second shoji), and can be attached to the inner periphery of the frame in a state aligned vertically together with the face material 21A. According to this configuration, the window unit 100 for the wall body 30 and the window unit 100 as a small ventilation window for the window 200 can be shared, thereby reducing manufacturing costs compared to when the window unit 100 is manufactured separately.

[0039] Second embodiment As shown in FIG. 10, the window unit 100 may be attached to the wall 30 via a mounting bracket 37. In this case, the mounting bracket 37 is fixed to the wall 30 via a wall bolt 38, and fixed to the frame 110 via a screw 39. The mounting bracket 37 is made of a metal material such as an aluminum alloy, for example, stainless steel. The gap between the inner circumferential surface 301a, the frame 110, and the facing material 30b is filled with a sealant 36. The mounting bracket 37 is an example of a mounting member. The mounting bracket 37 is also an example of a first mounting bracket that is fixed to the wall 30 and the frame 110.

[0040] When the gap between the inner peripheral surface 301a of the opening 301 and the outer peripheral surface of the frame body 110 is larger, if the wall body 30 and the frame body 110 are joined with only a sealing material, there is a risk that the joining strength will be insufficient or that the window unit 100 will shake due to external vibrations. In this regard, according to this embodiment, the window unit 100 can be more firmly fixed to the wall body 30 via the mounting bracket 37 (first mounting bracket, mounting member) compared to when the wall body 30 and the frame body 110 are fixed with only a sealing material. In other words, the window unit 100 can be easily applied to an opening 301 that is larger in size than the frame body 110 of the window unit 100.

[0041] Third embodiment As shown in FIG. 11, the window unit 100 may be attached to the wall body 30 via a four-sided frame 40. The four-sided frame 40 extends along the upper edge, lower edge, left edge, and right edge of the inner peripheral surface 301a in the cross-sectional shape shown in FIG. 11. The four-sided frame 40 is formed by assembling metal shapes made of extruded shapes formed from metal such as aluminum alloy around four sides. The four-sided frame 40 has a C-shaped channel portion 41, a mounting wall 42, and a protruding wall 43. The C-shaped channel portion 41 has a C-shaped cross-sectional shape that is open toward the outer periphery side and extends vertically or horizontally along the inner peripheral surface 301a. The C-shaped channel portion 41 has a visible wall 41a that forms a visible surface. The visible wall 41a is located away from the inner peripheral surface 301a and is approximately parallel to the inner peripheral surface 301a. The mounting wall 42 extends from the projection wall 41a so as to approach the inner peripheral surface 301a, and is bent in an L-shape at a position away from the inner peripheral surface 301a. The tip portion of the mounting wall 42 is approximately parallel to the inner peripheral surface 301a. The tip portion is fixed to the wall body 30 via the wall bolt 38. The protruding wall 43 protrudes from the projection wall 41a toward the inner peripheral side. The tip portion 43a of the protruding wall 43 is folded back in an approximately J-shape. The frame body 110 is set in the frame 40 with the protruding wall 110d and the outer peripheral wall 110e of the frame body 110 abutting against the tip portion 43a. At this time, a groove-shaped gap open to the indoor side is formed by the projection wall 41a, the protruding wall 43, and the outer peripheral wall 110e. A sealant 51 is injected into the groove-shaped gap from the inside of the room, and the sealant 51 joins the visible wall 41a, i.e., the frame 40, and the outer peripheral wall 110e, i.e., the frame body 110. The sealant 51 also has the function of maintaining the aesthetic appearance by filling the gap. Note that within the groove, a backup material 52 is inserted on the outside of the sealant 51. With this configuration, the window unit 100 is attached to the wall body 30 via the frame 40, on the inner periphery of the frame 40. The frame 40 is an example of a mounting member.

[0042] The frame 40 is firmly fixed to the wall body 30 via the wall bolts 38, and is stably supported on the inner peripheral surface 301a. Therefore, according to this embodiment, the window unit 100 can be more firmly and stably fixed to the wall body 30 via the frame 40 (mounting member).

[0043] Moreover, the window unit 100 is joined to the frame 40 via the sealing material 51. Therefore, according to this embodiment, the window unit 100 can be attached to the frame 40 more easily with a simpler configuration.

[0044] (Fourth embodiment) As shown in FIG. 12, when the window unit 100 is attached to the wall body 30 via the four-sided frame 40, the frame body 110 of the window unit 100 and the four-sided frame 40 may be attached via mounting brackets 37a and 37b. The mounting brackets 37a and 37b each have an L-shape. The mounting bracket 37a is attached to the front wall 41a of the four-sided frame 40 via a screw 39 so as to protrude from the front wall 41a to the inner periphery side in a position intersecting the front direction. The mounting bracket 37b is attached to the outer peripheral wall 110e of the frame body 110 via a screw 39 so as to protrude from the outer peripheral wall 110e to the outer periphery side in a position intersecting the front direction. In the gap between the front wall 41a and the outer peripheral wall 110e, the mounting brackets 37a and 37b are overlapped in the front direction, and the overlapped portions are connected via the screw 39. With this configuration, the window unit is attached to the wall body 30 via the mounting brackets 37a, 37b and the frame 40. The mounting brackets 37a, 37b are an example of a second mounting bracket. In addition, a backup material 52 is inserted from the indoor side into the gap between the projection wall 41a and the outer peripheral wall 110e, and a sealant 51 is injected into the indoor side of the backup material 52. In this case, the portion where the mounting brackets 37a, 37b overlap each other can also function as a positioning portion that limits the movement of the backup material 52 to the outdoor side. With this configuration, the frame body 110 and the frame 40 are fixed even more firmly. The sealant 51 also has the function of filling the gap and maintaining the aesthetic appearance.

[0045] According to this embodiment, the window unit 100 is fixed to the frame 40 via the mounting brackets 37a and 37b. Therefore, according to this embodiment, the window unit 100 can be attached to the frame 40 more firmly.

[0046] Fifth embodiment As shown in FIG. 13, in a configuration in which a horizontal bar 26 is provided on the inner sash 20A, the window unit 100 may be provided between the horizontal bar 26 and the upper frame 23A. In this case, the lower frame 114 is adjacent to the upper side of the horizontal bar 26 and extends laterally along the horizontal bar 26. Similarly to the upper frame 23A, the horizontal bar 26 is configured with an opening 20a1 provided in the inner peripheral wall 20a (see FIG. 8), and the lower frame 114 is configured with two protruding walls 110d protruding from the outer peripheral wall 110e to the outer periphery side (see FIG. 8) similar to the upper frame 113. This allows the lower frame 114 and the horizontal bar 26 to engage with each other in the same way as the upper frame 113 and the upper frame 23A.

[0047] The present invention is not limited to the above-described embodiment and modifications, and can be practiced with various modifications. For example, the structure of the mounting member, mounting bracket, and frame can be practiced with various modifications.

[0048] In the ventilation structure, the first screen may be a frameless panel. According to the present invention, the structure of the shoji screen can be simplified, and the effort and cost of manufacturing the shoji screen and, ultimately, the window unit can be further reduced.

[0049] In the ventilation structure, the frame may be directly fixed to the wall. According to the present invention, the window unit can be more easily installed with a simpler configuration, which provides advantages such as reducing the cost of materials required for installation and reducing the labor required for installation, thereby shortening the time required for installation.

[0050] In the ventilation structure, the frame may be fixed to the wall via a mounting member. According to the present invention, the window unit can be more firmly fixed to the wall body via the mounting member.

[0051] In the ventilation structure, the mounting member may have a first mounting fitting fixed to the wall body and the frame body. According to the present invention, the window unit can be more firmly fixed to the wall body with a relatively simple structure.

[0052] In the ventilation structure, the mounting member may have a four-sided frame that is disposed on an inner periphery of the opening and fixed to the wall body, and the frame body may be fixed to the inner periphery of the four-sided frame. According to the present invention, the window unit can be fixed to the wall body more firmly and stably.

[0053] In the ventilation structure, the frame body may be joined to the four-sided frame via a sealing material. According to the present invention, the window unit can be more easily attached to the frame on all four sides using a simpler structure.

[0054] In the ventilation structure, the mounting member may have a second mounting fixture that fixes the four-sided frame and the frame body. According to the present invention, the window unit can be attached more firmly to the frame on all four sides. [Explanation of symbols]

[0055] 20A inner shoji (second shoji), 30 wall body, 35, 36 sealing material, 37 mounting bracket (first mounting bracket, mounting part), 37a, 37b mounting bracket (second mounting bracket, mounting part), 40 four-sided frame (mounting part), 51 sealing material, 100 window unit, 111, 112 vertical frame, 113 upper frame (horizontal frame), 114 lower frame (horizontal frame), 120A surface material (first shoji), 301 opening.

Claims

1. A wall having an opening; A window unit including a frame body that is attached to the opening and has two vertical frames and two horizontal frames assembled around all four sides, and at least one first shoji screen that is attached to the frame body and can move along the two horizontal frames; Equipped with The window unit is configured so that it can be incorporated as a small ventilation window into a second shoji screen having a vertical dimension larger than that of the first shoji screen, forming a ventilation structure.

2. The ventilation structure according to claim 1 , wherein the first screen is a frameless panel.

3. The ventilation structure according to claim 1 or 2, wherein the frame is directly fixed to the wall.

4. The ventilation structure according to claim 1 or 2, wherein the frame is fixed to the wall via a mounting member.

5. The ventilation structure according to claim 4 , wherein the mounting member has a first mounting metal fitting fixed to the wall body and the frame body.

6. the mounting member has a four-sided frame that is disposed on an inner periphery side of the opening and is fixed to the wall body, The ventilation structure according to claim 4 , wherein the frame body is fixed to an inner peripheral side of the four-sided frame.

7. The ventilation structure according to claim 6 , wherein the frame body is joined to the four-sided frame via a sealing material.

8. The ventilation structure according to claim 6 , wherein the mounting member has a second mounting metal fitting that fixes the frame and the frame body.

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