Interior window

Abstract

To provide an interior window consisting of an opening window that allows for simple ventilation of the bathroom without the need to open the shoji screen. [Solution] An inner window provided on the interior side of an exterior window provided in an opening in a bathroom, comprising a frame formed by an upper frame, a lower frame, and a pair of vertical frames, a sliding screen attached to the inside of the frame so as to be able to open toward the interior, and a ventilation device that allows ventilation in the interior-out direction.

Description

Technical Field

[0001] This disclosure relates to an inner window.

Background Art

[0002] Conventionally, it has been known to provide a double window by providing an inner window composed of a sliding window on the indoor side of an outer window provided at an opening of a bathroom (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The bathroom environment often requires opening and closing the window for ventilation purposes. When the bathroom window is composed of a double window consisting of an outer window and an inner window, it is necessary to open and close the window twice with the outer window and the inner window. In particular, when a sliding window that opens toward the indoor side is used as the inner window, there is a risk of interference between the opened sliding window and the bather when ventilation is desired during bathing. In the above conventional technology, a ventilation part for ventilating in the indoor-outdoor direction is provided in the inner window composed of a sliding window, but it is not disclosed about solving the problem when the inner window is a sliding window having a sliding window that opens toward the indoor side.

[0005] Therefore, an object of the present disclosure is to provide an inner window composed of a sliding window that can easily ventilate the bathroom without having to open the sliding window.

Means for Solving the Problems

[0006] This disclosure relates to an interior window provided on the interior side of an exterior window provided in an opening in a bathroom, the interior window comprising a frame formed by an upper frame, a lower frame, and a pair of vertical frames, a sash that is housed inside the frame so as to be openable toward the interior, and a ventilation device that allows ventilation in the interior-exterior direction. [Brief explanation of the drawing]

[0007] [Figure 1] This is a view from the interior side of a double-glazed window equipped with an inner window according to the first embodiment. [Figure 2] This is a vertical cross-section of the double window along line AA in Figure 1. [Figure 3] This is a cross-sectional view of the double-glazed window along line BB in Figure 1. [Figure 4] Figure 2 is a magnified view of the upper frame side of the double-glazed window. [Figure 5] Figure 2 is a magnified view of the lower frame side of the double-glazed window. [Figure 6] This is a magnified view of the left vertical frame side of the double-glazed window shown in Figure 3. [Figure 7] This is an enlarged view of the right vertical frame side of the double-glazed window shown in Figure 3. [Figure 8] This is a perspective view showing the disassembled frame of the inner window according to the first embodiment. [Figure 9] This is a view from the outside of the window frame and door stop member of the first embodiment. [Figure 10] This is a view from the interior side of the frame and door stop member of the interior window according to the first embodiment. [Figure 11] This is a view from the interior side of a double-glazed window equipped with an inner window according to the second embodiment. [Figure 12] This is a cross-sectional view of the double-glazed window along line CC in Figure 11. [Figure 13] This is a view from the interior side of a double-glazed window equipped with an inner window according to the third embodiment. [Figure 14] This is a vertical cross-sectional view of the double-glazed window along the DD line in Figure 13. [Modes for carrying out the invention]

[0008] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Figures 1 to 8 show a double-glazed window 1 equipped with an inner window 3 according to the first embodiment. The double-glazed window 1 is located inside the opening 101 of a bathroom in the building structure 100, with an outer window 2 on the exterior side X1 and an inner window 3 spaced apart from the outer window 2 on the interior side X2 of the outer window 2.

[0009] Here, we define the directions shown in each figure. In each figure, X1 indicates the exterior side and X2 indicates the interior side. In a double-glazed window, the direction toward the inside of the rectangular frame is defined as the interior, and the direction toward the outside of the rectangular frame is defined as the exterior. In the rectangular frame, the surface facing inward is called the inner surface, and the surface facing outward is called the outer surface.

[0010] The outer window 2 is positioned at the outermost X1 of the bathroom opening 101. The specific configuration of the outer window 2 is not particularly limited. As shown in Figures 2 and 3, the outer window 2 in this embodiment is an awning window in which multiple narrow glass plates 25 extending horizontally are arranged vertically inside a frame 20 formed by framing an upper frame 21, a lower frame 22, and a pair of left and right vertical frames 23, 24 in a rectangular shape. Each glass plate 25 is linked to the operation of an operator handle 26 provided on the indoor side X2 of the vertical frame 24 via a link mechanism (not shown). That is, when the operator handle 26 is rotated, each glass plate 25 rotates via the link mechanism and opens toward the outdoor side X1. This opens the inside of the frame 20. A screen door 27 is provided on the indoor side X2 of the multiple glass plates 25 so as to cover the entire inside of the frame 20 from the indoor side X2. The operator handle 26 is located on the indoor side X2 of the screen door 27.

[0011] The upper frame 21 of the outer window 2 is made of a metal extruded profile and, as shown in Figure 4, is composed of an outdoor frame member 211 and an indoor frame member 212. The outdoor frame member 211 has a mounting piece 211a that protrudes outward and is attached to the building frame 100 from the outdoor side X1 by screws 21a. The outdoor frame member 211 has an inclined wall portion 211b that extends inward and diagonally toward the indoor side X2 on the indoor side X2 of the mounting piece 211a, and a vertical wall portion 211c that extends outward from the end of the inclined wall portion 211b on the indoor side X2. The outer end of the vertical wall portion 211c abuts against the upper inner circumferential surface 101a of the opening 101. The indoor frame member 212 is adjacent to the indoor side X2 of the vertical wall portion 211c of the outdoor frame member 211 and extends toward the indoor side X2.

[0012] A resin screen door upper frame member 213 is provided extending from the indoor side X2 end of the outdoor side frame member 211 to the outdoor side X1 end of the indoor side frame member 212. An engaging projection 213a is provided at the outdoor side X1 end of the screen door upper frame member 213. The screen door upper frame member 213 has a protruding piece 213b that projects inward. The upper end of the screen door 27 is supported by contacting the protruding piece 213b from the indoor side X2. The screen door upper frame member 213 engages with the outdoor side frame member 211 by inserting the engaging projection 213a into a recess 211d formed at the boundary between the inclined wall portion 211b and the vertical wall portion 211c of the outdoor side frame member 211. The indoor side X2 end of the screen door upper frame member 213 is fixed by a screw 213c to a screw mounting groove 212a formed in the indoor side frame member 212.

[0013] The lower frame 22 of the outer window 2 is made of a metal extrusion profile and is composed of an outdoor side frame member 221 and an indoor side frame member 222 as shown in FIG. 5. The outdoor side frame member 221 has a mounting piece 221a that projects outward and is attached to the building body 100 from the outdoor side X1 by screws 22a. The outdoor side frame member 221 has a first hollow portion 221b disposed on the outermost outdoor side X1, a second hollow portion 221c disposed adjacent to the outside of the first hollow portion 221b, and a third hollow portion 221d disposed so as to overlap the inside of the end portion on the indoor side X2 of the first hollow portion 221b. The end portion of the third hollow portion 221d on the indoor side X2 projects more inwardly on the indoor side X2 than the first hollow portion 221b and has a standing wall portion 221e that extends outward. The outer end of the standing wall portion 221e is in contact with the lower inner peripheral surface 101b of the opening 101 via a waterproof sheet 110. The indoor side frame member 222 is adjacent to the indoor side X2 of the standing wall portion 221e of the outdoor side frame member 221 and extends toward the indoor side X2.

[0014] A resin screen door lower frame member 223 is provided across the end portion of the outdoor side frame member 221 on the indoor side X2 and the end portion of the indoor side frame member 222 on the outdoor side X1. An engaging projection 223a is provided at the end portion of the screen door lower frame member 223 on the outdoor side X1. The screen door lower frame member 223 has a projecting piece 223b that projects inward. The lower end portion of the screen door 27 is supported by contacting the projecting piece 223b and projecting from the indoor side X2. The screen door lower frame member 223 is engaged with the outdoor side frame member 221 by inserting the engaging projection 223a into a recess 221f formed on the inner surface of the end portion of the third hollow portion 221d of the outdoor side frame member 221 on the indoor side X2. The end portion of the screen door lower frame member 223 on the indoor side X2 is fixed to a screw mounting groove 222a formed in the indoor side frame member 222 by screws 223c.

[0015] The pair of left and right vertical frames 23 and 24 of the outer window 2 have the same structure, are made of metal extrusion profiles, and are formed symmetrically left and right. As shown in FIGS. 6 and 7, the vertical frames 23 and 24 are composed of outdoor side frame members 231 and 241 and indoor side frame members 232 and 242. The outdoor side frame members 231 and 241 have mounting pieces 231a and 241a that project outward, and are attached to the building body 100 from the outdoor side X1 by screws 23a and 24a. The outdoor side frame members 231 and 241 extend toward the indoor side X2 beyond the mounting piece 211a. The ends of the outdoor side frame members 231 and 241 on the indoor side X2 have vertical wall portions 231b and 241b that extend outward. The outer ends of the vertical wall portions 231b and 241b are in contact with the vertical inner peripheral surfaces 101c and 101d of the opening 101. The indoor side frame members 232 and 242 are adjacent to the vertical wall portions 231b and 241b of the outdoor side frame members 231 and 241 on the indoor side X2 and extend toward the indoor side X2.

[0016] Resin screen vertical frame members 233 and 243 are provided across the ends of the outdoor side frame members 231 and 241 on the indoor side X2 and the ends of the indoor side frame members 232 and 242 on the outdoor side X1. The ends of the screen vertical frame members 233 and 243 on the outdoor side X1 overlap the inner surfaces of the ends on the indoor side X2 of the mounting pieces 231a and 241a of the outdoor side frame members 231 and 241. The screen vertical frame members 233 and 243 have projecting pieces 233a and 243a that project inward from the same positions in the indoor-outdoor direction as the vertical wall portions 231b and 241b of the outdoor side frame members 231 and 241. The left and right ends of the screen 27 are supported by contacting the projecting pieces 233a and 243a and projecting from the indoor side X2. The ends of the screen vertical frame members 233 and 243 on the indoor side X2 are fixed to the ends of the indoor side frame members 232 and 242 on the outdoor side X1 by screws 233b and 243b.

[0017] As shown in Figures 2 and 3, a resin frame member 5 with a hollow structure is provided on the interior side X2 of the exterior window 2. As shown in Figures 4 to 7, the frame member 5 is provided in a cylindrical shape that extends around the perimeter of the opening shape of the opening 101 by assembling an upper frame member 51, a lower frame member 52, and left and right vertical frame members 53, 54 in a rectangular shape, and extends from the exterior window 2 towards the interior side X2. Specifically, as shown in Figure 4, the upper frame member 51 is fixed to the building structure 100 by screws 51a between the interior frame member 212 of the upper frame 21 and the building structure 100, and extends towards the interior side X2. As shown in Figure 5, the lower frame member 52 is fixed to the building structure 100 by screws 52a between the interior frame member 222 of the lower frame 22 and the building structure 100, and extends towards the interior side X2. As shown in Figures 6 and 7, the vertical frame members 53 and 54 are fixed to the building structure 100 by screws 53a and 54a between the interior frame members 232 and 242 of the vertical frames 23 and 24 and the building structure 100, and extend toward the interior side X2.

[0018] As shown in Figure 4, the indoor frame member 212 of the upper frame 21 is attached to the building structure 100 by screws 212b that pass through the upper frame member 51 at the portion where it overlaps with the upper frame member 51. As shown in Figure 5, the indoor frame member 222 of the lower frame 22 is attached to the building structure 100 by screws 222b that pass through the lower frame member 52 at the portion where it overlaps with the lower frame member 52. As shown in Figures 6 and 7, the indoor frame members 232 and 242 of the vertical frames 23 and 24 are attached to the building structure 100 by screws 232a and 242a that pass through the vertical frame members 53 and 54 at the portions where they overlap with the vertical frame members 53 and 54, respectively. As shown in Figure 5, the indoor frame member 222 of the lower frame 22 is provided with a cover material 224 that conceals the fixing portion by screws 222b.

[0019] As shown in Figures 4 to 7, the upper frame member 51, the lower frame member 52, and the vertical frame members 53 and 54 are each provided with flange portions 511, 521, 531, and 541 that protrude outward from the ends of the indoor side X2. The upper frame member 51 and the lower frame member 52 are fixed to the upper and lower bathroom wall panels 120 by screws 51b and 52b that pass through the flange portions 511 and 521 from the indoor side X2, as shown in Figures 4 and 5. The vertical frame members 53 and 54 are fixed to the left and right bathroom wall panels 120 by screws 53b and 54b that pass through the flange portions 531 and 541 from the indoor side X2, as shown in Figures 6 and 7. A resin cover member 55 is attached around the ends of the indoor side X2 of the frame member 5 so as to cover the screws 51b, 52b, 53b, and 54b. A sealant 56 is applied around all four sides of the cover member 55 and the bathroom wall panel 120.

[0020] Sealing materials 200a, 200b, and 200c are provided around the four sides of the frame 20 of the outer window 2 on the interior side X2 of the screen door 27. Sealing material 200a is provided between the interior side X2 ends of the upper frame member 213, lower frame member 223, and vertical frame members 233, 243 of the screen door, and the interior side frame members 212, 222, 232, 242 of the upper frame 21, lower frame 22, and vertical frames 23, 24. Sealing material 200b is provided between the interior side frame members 212, 222, 232, 242 and the frame member 5. The sealing material 200c is provided between the outdoor end X1 and the left and right ends of the cover material 224 of the lower frame 22, and the indoor frame members 222, 232, 242 of the lower frame 22 and the vertical frames 23, 24.

[0021] As shown in Figures 2 to 7, the frame member 5 extends inward X2 from the building frame 100. Outside the frame member 5, a gap 130 is formed around all four sides between the building frame 100 and the bathroom wall panel 120.

[0022] The inner window 3 is positioned on the interior side X2 of the outer window 2 and is attached to the inside of the frame member 5. A gap 130 is located on the outside of the frame member 5 where the inner window 3 is installed. The inner window 3 is an opening window constructed by housing a sash 4 that opens toward the interior side X2 inside the frame body 30.

[0023] As shown in Figures 1 to 7, the frame 30 is constructed by framing an upper frame 31, a lower frame 32, and a pair of left and right vertical frames 33 and 34 in a rectangular shape around its perimeter. The upper frame 31, lower frame 32, and vertical frames 33 and 34 are made of extruded profiles formed by extrusion molding from metal or resin material. The upper frame 31, lower frame 32, and vertical frames 33 and 34 have the same configuration except that their positions on the frame 30 differ vertically and horizontally, and that the lengths of the upper frame 31 and lower frame 32 and the left and right vertical frames 33 and 34 differ.

[0024] Figure 8 shows the common configuration of the upper frame 31, lower frame 32, and vertical frames 33, 34. The upper frame 31, lower frame 32, and vertical frames 33, 34 have an exterior wall portion 30a facing the exterior side X1, an interior wall portion 30b facing the interior side X2, an outer peripheral wall portion 30c facing the outside of the frame body 30, and an inner peripheral wall portion 30d facing the inside of the frame body 30, and are formed in a rectangular cross-section with a hollow portion 30e inside.

[0025] Multiple protruding sections 30f are provided on the outer perimeter wall 30c. The multiple protruding sections 30f are provided so as to project outward from the outer perimeter wall 30c. The multiple protruding sections 30f extend along the entire length of the upper frame 31, lower frame 32, and vertical frames 33, 34, and are arranged parallel to each other in the indoor-outdoor direction. A fin member 30g made of resin or rubber is provided at the indoor side X2 end of the outer perimeter wall 30c.

[0026] A pair of protruding pieces 30h and 30i are integrally formed on the inner circumferential wall portion 30d. The protruding pieces 30h and 30i are provided to protrude inward from the frame 30 on the outdoor side X1, which is further from the center of the inner circumferential wall portion 30d in the indoor-outdoor direction. The protruding pieces 30h and 30i extend along the longitudinal direction of the upper frame 31, lower frame 32, and vertical frames 33 and 34, and are arranged parallel to each other at a predetermined interval in the indoor-outdoor direction. One protruding piece 30h is positioned on the outdoor side X1, and the other protruding piece 30i is positioned on the indoor side X2. One protruding piece 30h is shorter in height than the other protruding piece 30i. A locking claw portion 30h1, which is bent toward the outdoor side X1, is formed at the tip of the protruding piece 30h. Multiple locking protrusions 30i1 are formed on both the outdoor side X1 and the indoor side X2 of the protruding piece 30i.

[0027] A screw insertion hole 30j is formed in the inner circumferential wall portion 30d between a pair of protruding pieces 30h and 30i. A screw hole 30k is formed in the outer circumferential wall portion 30c corresponding to the screw insertion hole 30j. The screw insertion hole 30j is a hole through which a fixing member, described later, for fixing the frame 30 is inserted. The screw hole 30k is a hole into which the shaft portion of the fixing member inserted through the screw insertion hole 30j is inserted and the head portion is seated. Multiple screw insertion holes 30j and screw holes 30k are provided at predetermined intervals along the length of the upper frame 31, lower frame 32, and vertical frames 33 and 34d.

[0028] As shown in Figures 9 and 10, the frame 30 has a vertically dominant structure in which the upper frame 31 is positioned between the upper ends of the vertical frames 33 and 34, and the lower frame 32 is positioned between the lower ends of the vertical frames 33 and 34. Therefore, the pair of protruding pieces 30h and 30i of the upper frame 31 and the lower frame 32 are provided along the entire length of the upper frame 31 and the lower frame 32, while the pair of protruding pieces 30h and 30i of the vertical frames 33 and 34 are cut out over the parts that come into contact with the upper frame 31 and the lower frame 32.

[0029] The frame 30 is provided with door stop members 35 around all four sides. The door stop members 35, like the frame 30, are made of extruded profiles formed by extrusion molding from metal or resin material, and are attached to the inner surface of the frame 30, protruding inward from the frame 30. Specifically, the door stop members 35 are individually attached to the inner wall portions 30d of the upper frame 31, lower frame 32, and vertical frames 33, 34 along their respective longitudinal directions. As shown in Figure 8, the door stop member 35 has an inner wall portion 35a facing the inside of the frame 30, an outer wall portion 35b extending from the outer end X1 of the inner wall portion 35a toward the inner wall portion 30d of the frame 30, and an inner wall portion 35c extending from the inner end X2 of the inner wall portion 35a toward the inner wall portion 30d of the frame 30. The exterior wall portion 35b and the interior wall portion 35c protrude from the inner peripheral wall portion 35a at the same height. The distance between the exterior wall portion 35b and the interior wall portion 35c in the interior-exterior direction is formed so that a pair of protruding pieces 30h and 30i of the frame 30 can be sandwiched from the interior-exterior direction. In the door stopper member 35, the exterior wall portion 35b and the interior wall portion 35c constitute a pair of engaging pieces that engage with the pair of protruding pieces 30h and 30i of the frame 30.

[0030] A vertical wall portion 35d is integrally formed at the outer-side X1 end of the inner circumferential wall portion 35a, which is bent toward the inside of the frame 30. However, the door stop members 35 attached to the left and right vertical frames 33 and 34 do not have a vertical wall portion 35d. At the outer-side X2 end of the inner circumferential wall portion 35a, a resin or rubber fin member 35e is provided, which contacts the outer-side X1 surface of the frame 40 of the sliding door 4 when the sliding door 4 is closed.

[0031] At the tip of the exterior wall portion 35b, a locking projection 35b1 is integrally formed, which bends toward the interior side X2 and locks from the exterior side X1 to the locking claw portion 30h1 of the protruding piece 30h on the exterior side X1 of the upper frame 31, lower frame 32, and vertical frames 33, 34. On the exterior side X1 surface of the interior wall portion 35c, an L-shaped clamping piece 35f is formed, which clamps the protruding piece 30i on the interior side X2 of the upper frame 31, lower frame 32, and vertical frames 33, 34 between itself and the interior wall portion 35c. Furthermore, on the exterior side X1 surface of the interior wall portion 35c, a plurality of locking projections 35c1 are formed, which lock the plurality of locking projections 30i1 of the protruding piece 30i that is clamped between itself and the clamping piece 35f.

[0032] The door stopper member 35 is attached from the inside of the frame 30 so as to sandwich the pair of protruding pieces 30h, 30i of the upper frame 31, lower frame 32, and vertical frames 33, 34 between the exterior wall portion 35b and the interior wall portion 35c. The locking projection 35b1 of the exterior wall portion 35b of the door stopper member 35 is locked onto the locking claw portion 30h1 of the protruding piece 30h of the upper frame 31, lower frame 32, and vertical frames 33, 34. The clamping piece 35f of the door stopper member 35 clamps the protruding pieces 30i of the upper frame 31, lower frame 32, and vertical frames 33, 34 between itself and the interior wall portion 35c. As a result, the door stopper member 35 is attached to the inner circumferential surface of the frame 30 so as to cover the screw insertion hole 30j around all four sides. As shown in Figures 9 and 10, the door stop members 35 that extend around all four sides have a horizontally dominant structure in which the door stop members 35,35 of the left and right vertical frames 33,34 are positioned between the door stop members 35,3 of the upper frame 31 and the lower frame 32.

[0033] As shown in Figures 1 to 3, the shoji screen 4 is constructed by housing a glass panel G, which is the facing material, inside a frame body 40 formed by assembling an upper frame 41, a lower frame 42, and a pair of left and right vertical frames 43, 44 in a rectangular shape. In this embodiment, the shoji screen 4 has one glass panel G, but the shoji screen 4 may have multiple glass panels G separated by spacers. Two hinges 45, 45 are attached to the vertical frame 43 on the hanging side of the shoji screen 4 and the vertical frame 33 of the frame body 30. As shown in Figures 1 and 6, metal reinforcing plates 36, 36 are provided in the hollow portion 30e of the vertical frame 33, corresponding to the hinges 45, 45. The hinges 45, 45 are attached to the inner circumferential wall portion 30d of the vertical frame 33 by screwing screws (not shown) into the reinforcing plates 36.

[0034] A cam latch handle 46 is attached to the interior side X2 of the vertical frame 44 on the door edge side of the shoji screen 4. A cam latch receiver 47 that engages with the cam latch handle 46 is provided on the exterior wall portion 30a of the vertical frame 34 of the frame body 30. A metal reinforcing plate 36 is also provided in the hollow portion 30e of the vertical frame 34, similar to the vertical frame 33. As shown in Figure 1, the cam latch receiver 47 is attached to the vertical frame 34 by screwing a screw 47a that penetrates the interior wall portion 30b of the vertical frame 34 into the reinforcing plate 36.

[0035] When the user pulls the cam latch handle 46 toward the interior side X2, the sash 4 rotates toward the interior side X2 around the hinges 45, 45. This opens the inside of the frame 30. When the user pushes the cam latch handle 46 toward the exterior side X1, the sash 4 rotates toward the exterior side X1 around the hinges 45, 45, and comes into contact with the door stopper member 35 that runs around the inside of the frame 30 from the interior side X2. This closes the inside of the frame 30.

[0036] As shown in Figures 1, 2, and 4, the inner window 3 is equipped with a ventilation brace 6 as a ventilation device. The ventilation brace 6 is constructed of a rectangular parallelepiped housing 60 made of metal or resin that is elongated in one direction. As shown in Figure 1, the ventilation brace 6 of this embodiment has a length that extends across the entire width of the frame 30. The ventilation brace 6 has a number of ventilation holes 61 on the exterior X1 and interior X2 surfaces, respectively. The interior of the ventilation brace 6 is configured to allow ventilation in the in-room and out-of-room direction through the ventilation holes 61 on the exterior X1 and interior X2. The ventilation brace 6 has a shutter (not shown) inside that blocks ventilation in the in-room and out-of-room direction by shielding the ventilation holes 61. As shown in Figure 1, the shutter is provided so that the ventilation holes 61 can be opened and closed by operating an operating knob 62 provided on the exterior surface of the interior X2. Inside the ventilation brace 6, on the interior X2 side, a filter 63 is provided to prevent the entry of foreign matter such as dust and pollen.

[0037] The ventilation brace 6 is positioned between the upper frame 31 of the frame body 30 and the upper frame member 51 of the frame member 5, and is attached to the upper frame member 51 by a plurality of screws 6a that pass through the upper frame member 51. The ventilation brace 6 is positioned on the opposite side of the outer gap 130, with the upper frame member 51 in between. Each screw 6a has an anchor plug 6a1. The anchor plug 6a1 passes through the upper frame member 51 and protrudes into the gap 130. The anchor plug 6a1 is configured such that the tip side that is positioned inside the gap 130 gradually expands in diameter as the screw 6a is screwed in. Therefore, even if a gap 130 is formed on the outside of the frame member 5, the ventilation brace 6 can be firmly fixed to the frame member 5.

[0038] The upper frame 31 of the frame 30 is attached to the ventilation brace 6 by screws 31a that pass through screw insertion holes 30j in the upper frame 31. The screws 31a that pass through the screw insertion holes 30j penetrate the screw holes 30k in the outer peripheral wall portion 30c of the upper frame 31 and are screwed into the housing 60 of the ventilation brace 6. As shown in Figure 4, the depth dimension of the ventilation brace 6 along the indoor-outdoor direction is larger than the depth dimension of the frame 30, as shown in Figure 4. The ventilation brace 6 protrudes from the frame 30 toward the outdoor side X1 and the indoor side X2, respectively.

[0039] As shown in Figure 5, the lower frame 32 of the frame body 30 is attached to the lower frame member 52 of the frame member 5 via a reinforcing frame member 7. The reinforcing frame member 7 is made of an extruded profile of metal or resin and has a plurality of hollow sections 72 arranged in the indoor-outdoor direction, flanking a plurality of partition walls 71. The reinforcing frame member 7 has a length that extends across the entire width of the frame body 30. The depth dimension of the reinforcing frame member 7 along the indoor-outdoor direction is larger than the depth dimension of the frame body 30 and the depth dimension of the gap 130. The reinforcing frame member 7 protrudes outward X1 and inward X2 from the frame body 30, respectively, and covers the entire outer gap 130 of the lower frame member 52 in the depth direction. The end of the reinforcing frame member 7 on the outdoor side X1 protrudes outward X1 more than the lower frame 32 and is positioned to abut against the indoor frame member 222 of the lower frame 22 of the outer window 2 from the indoor side X2. The inner surface of the cover material 224 provided on the interior frame member 222 of the lower frame 22 of the exterior window 2 and the inner surface of the reinforcing frame member 7 are arranged flush with each other. The reinforcing frame member 7 is fixed to the building structure 100 at the end of the exterior side X1 by screws 7a that penetrate the reinforcing frame member 7 and the lower frame member 52.

[0040] The reinforcing frame member 7 is positioned between the lower frame 32 and the lower trim member 52 of the frame body 30. The lower frame 32 is attached to the reinforcing frame member 7 by screws 32a that pass through screw insertion holes 30j in the lower frame 32. The screws 32a that pass through the screw insertion holes 30j penetrate the screw holes 30k in the outer peripheral wall portion 30c of the lower frame 32 and are screwed into the reinforcing frame member 7. The screws 32a pass through the reinforcing frame member 7 and are screwed into the lower trim member 52.

[0041] As shown in Figures 6 and 7, the left and right vertical frames 33 and 34 of the frame body 30 are attached to the vertical frame members 53 and 54 by screws 33a and 34a that pass through screw insertion holes 30j of the vertical frames 33 and 34, and screws 33b and 34b that penetrate from the inner peripheral wall portion 30d of the vertical frames 33 and 34 through the outer peripheral wall portion 30c and are screwed into the vertical frame members 53 and 54. The screws 33a and 34a that pass through screw insertion holes 30j pass through screw holes 30k in the outer peripheral wall portion 30c of the vertical frames 33 and 34 and are screwed into the vertical frame members 53 and 54. The vertical frames 33 and 34 are positioned on the opposite side of the outer gap portion 130, with the vertical frame members 53 and 54 in between. Screws 33a, 34a and screws 33b, 34b each have anchor plugs 33a1, 34a1, 33b1, and 34b1, respectively. The anchor plugs 33a1, 34a1, 33b1, and 34b1 penetrate the vertical frame members 53 and 54 and protrude into the gap 130. The anchor plugs 33a1, 34a1, 33b1, and 34b1 are configured such that the tip side positioned within the gap 130 gradually expands in diameter as the screws 33a, 34a and screws 33b, 34b are screwed in. Therefore, even if a gap 130 is formed on the outside of the frame member 5, the vertical frames 33 and 34 can be firmly fixed to the frame member 5.

[0042] As described above, the inner window 3, which is installed on the interior side X2 of the outer window 2, is equipped with a ventilation brace 6 that allows for ventilation in both the interior and exterior directions. Therefore, it is not necessary to open the sash 4 toward the interior side X2, and the bathroom can be ventilated using the ventilation brace 6.

[0043] When fixing the frame 30 to the resin frame member 5, there are concerns regarding its strength due to the load from the frame 30 and the load from opening and closing the sash 4. In this embodiment of the inner window 3, a reinforcing frame member 7 is placed between the lower frame 32 and the lower frame member 52, and the reinforcing frame member 7 is fixed to the building structure 100 at its outer end X1, so that the load from the frame 30 is not easily directly applied to the frame member 5. Therefore, even if a gap 130 is formed on the outside of the lower frame member 52, the frame 30 can be firmly fixed to the resin lower frame member 52. Thus, in this embodiment of the inner window 3, while having a ventilation function provided by the ventilation brace 6 between the upper frame 31 and the upper frame member 51, it can be firmly fixed to the resin frame member 5 without applying any load.

[0044] Figures 11 and 12 show a double-glazed window 1A equipped with an inner window 3A according to the second embodiment. Parts with the same reference numerals as those in the double-glazed window 1 and inner window 3 according to the first embodiment indicate parts with the same configuration; therefore, detailed explanations of these parts may be omitted below, with reference to the above explanation.

[0045] In this interior window 3A, the ventilation brace 6 is positioned between the vertical frame 33 and the vertical trim member 53 of the frame body 30. The ventilation brace 6 is fixed to the vertical trim member 53 by screws 6a having anchor plugs 6a1. The vertical frame 33 is attached to the ventilation brace 6 by screws (not shown), similar to the upper frame 31 in the interior window 3.

[0046] The vertical frame 33 is positioned on the hinge side of the shoji screen 4. Since the shoji screen 4 is attached to the vertical frame 33 via hinges 45, 45, if the vertical frame 33 were directly attached to the resin vertical frame member 53, the load of the shoji screen 4 would be concentrated at the fixing point between the vertical frame 33 and the vertical frame member 53 via the hinges 45. Because the resin frame member 5 is less strong than the wooden frame member, the mounting state of the frame body 30 tends to become unstable when the load of the shoji screen 4 acts directly on the vertical frame member 53. With this inner window 3A, the vertical frame 33 is attached to the vertical frame member 53 via a ventilation brace 6, thus stabilizing the mounting state of the frame body 30.

[0047] Figures 13 and 14 show a double-glazed window 1B equipped with an inner window 3B according to the third embodiment. Parts with the same reference numerals as those in the double-glazed window 1 and inner window 3 according to the first embodiment indicate parts with the same configuration; therefore, detailed explanations of these parts may be omitted below, with reference to the above explanation.

[0048] In this interior window 3B, the ventilation brace 6 is positioned inside the upper frame 41 of the frame body 40 of the sash 4. The ventilation holes 61 are formed on the exterior X1 and interior X2 surfaces of the upper frame 41, respectively. With this configuration, by simply preparing a sash 4 with the ventilation brace 6 already built into the frame body 40, an interior window 3B can be constructed that allows ventilation in both the interior and exterior directions through the frame body 40, without the need to open the sash 4 toward the interior X2.

[0049] The upper frame 31 of the frame body 30 is attached to the upper frame member 51 by a screw 31a that passes through a screw insertion hole 30j of the upper frame 31. The screw 31a that passes through the screw insertion hole 30j penetrates the screw hole 30k of the outer peripheral wall portion 30c of the upper frame 31 and is screwed into the upper frame member 51. The screw 31a has an anchor plug 31a1. The anchor plug 31a1 passes through the upper frame member 51 and protrudes into the gap portion 130. The anchor plug 31a1 is configured such that as the screw 31a is screwed in, the tip side that is positioned in the gap portion 130 gradually expands in diameter. Therefore, even if a gap portion 130 is formed on the outside of the frame member 5, the upper frame 31 can be firmly fixed to the frame member 5.

[0050] As shown in Figure 14, this shoji screen 4 is equipped with two glass panes G, G separated by a spacer Ga, but there may be only one glass pane G or three or more.

[0051] The interior windows 3, 3A, and 3B described above are equipped with only one ventilation brace 6, but multiple ventilation braces 6 may be provided in the interior window. That is, the ventilation brace 6 only needs to be provided between at least one of the upper frame 31, lower frame 32, and vertical frames 33, 34 of the frame body 30 and the frame member 5. The ventilation brace 6 only needs to be provided inside at least one of the upper frame 41, lower frame 42, and vertical frames 43, 44 of the frame body 40 of the shoji screen 4. Furthermore, the ventilation brace 6 may be provided in at least one of the upper frame 31, lower frame 32, and vertical frames 33, 34 of the frame body 30 and the upper frame 41, lower frame 42, and vertical frames 43, 44 of the frame body 40 of the shoji screen 4.

[0052] The following effects are achieved with the above-described interior windows 3, 3A, and 3B. Specifically, the interior windows 3, 3A, and 3B are installed on the interior side X2 of the exterior window 2 installed in the opening 101 of the bathroom, and each has a frame 30 formed by an upper frame 31, a lower frame 32, and a pair of vertical frames 33 and 34, a sash 4 that is attached to the inside of the frame 30 so as to be able to be opened toward the interior side X2, and a ventilation brace 6 as a ventilation device that allows air to be ventilated in the direction of indoor and outdoor ventilation. With this, in the interior windows 3, 3A, and 3B, which are casement windows, the bathroom can be easily ventilated without having to open the sash 4.

[0053] In the inner windows 3, 3A, and 3B, there is a resin frame member 5 that extends from the outer window 2 towards the interior side X2 around the four sides of the opening 101, the frame body 30 is positioned inside the frame member 5, and the ventilation brace 6 is positioned between the frame body 30 and the frame member 5. With this, ventilation can be provided to the inner windows 3 and 3A without making any changes to the frame body 30 and the sash 4.

[0054] In the interior windows 3, 3A, and 3B, the ventilation brace 6 is positioned between the frame 30 (excluding the lower frame 32) and the frame member 5, and a reinforcing frame member 7 is provided between the lower frame 32 and the frame member 5. This allows the space between the lower frame 32 and the frame member 5 of the frame 30 to be reinforced by the reinforcing frame member 7.

[0055] In the interior windows 3, 3A, and 3B, the reinforcing frame member 7 protrudes outward X1 beyond the lower frame 32 and is fixed to the building structure 100 at the end of the outward X1, while the lower frame 32 is fixed to the reinforcing frame member 7. This makes it difficult for the load from the frame 30 to be directly applied to the frame member 5, allowing the frame 30 to be firmly fixed to the resin frame member 5.

[0056] In the interior windows 3, 3A, and 3B, the sash 4 is attached to one of the pair of vertical frames 33, 34 via a hinge 45 so as to be openable and closable, and the ventilation brace 6 is positioned between one of the vertical frames 33 and the frame member 5. As a result, the vertical frame 33 is attached to the resin frame member 5 via the ventilation brace 6, thus stabilizing the mounting state of the frame body 30.

[0057] In the interior windows 3, 3A, and 3B, the sash 4 has a frame body 40 formed by an upper frame 41, a lower frame 42, and a pair of vertical frames 43, 44, and the ventilation brace 6 is provided inside at least one of the upper frame 41, the lower frame 42, and the pair of vertical frames 43, 44 of the sash 4. With this, by simply preparing a sash 4 with the ventilation brace 6 already built into the frame body 40, it is possible to construct an interior window that allows ventilation in the indoor and outdoor directions through the frame body 40 without having to open the sash 4 toward the indoor side X2.

[0058] This disclosure includes interior windows as described in the following embodiments.

[0059] <Aspect 1> An interior window installed on the interior side of an exterior window installed in an opening in a bathroom, A frame formed by an upper frame, a lower frame, and a pair of vertical frames, A sliding screen is installed inside the frame so as to be able to be opened toward the interior, An interior window having a ventilation device that allows air to circulate both inside and outside the room.

[0060] <Aspect 2> The opening has a resin frame member that extends from the outer window toward the interior side around all four sides, The frame is positioned inside the picture frame member, The ventilation device is positioned between the frame and the picture frame member, as described in embodiment 1.

[0061] <Aspect 3> The ventilation device is positioned at least between the frame body other than the lower frame and the frame member. An inner window according to embodiment 2, wherein a reinforcing frame member is provided between the lower frame and the frame member.

[0062] <Aspect 4> The reinforcing frame member protrudes further outward than the lower frame and is fixed to the building structure at its outer end. The lower frame is fixed to the reinforcing frame member, as described in embodiment 3 of the inner window.

[0063] <Aspect 5> The aforementioned shoji screen is attached to one of the pair of vertical frames via a hinge so as to be able to be opened and closed. The ventilation device is positioned between the one vertical frame and the frame member, in the interior window according to embodiment 2.

[0064] <Aspect 6> The aforementioned shoji screen has a frame body formed by the upper frame, the lower frame, and the pair of vertical frames, The ventilation device is provided inside at least one of the upper frame, lower frame, and pair of vertical frames of the shoji screen, according to any one of embodiments 1 to 5. [Explanation of Symbols]

[0065] 2 Outer window, 3,3A,3B Inner window, 30 Frame, 31 Upper frame, 32 Lower frame, 33,34 Vertical frame, 4 Shoji screen, 40 Frame, 41 Upper frame, 42 Lower frame, 43,44 Vertical frame, 45 Hinges, 5 Frame members, 6 Ventilation brace (ventilation device), 7 Reinforcement frame members, 100 Building structure, 101 Opening

Claims

1. An interior window installed on the interior side of an exterior window installed in an opening in a bathroom, A frame formed by an upper frame, a lower frame, and a pair of vertical frames, A sliding screen is installed inside the frame so as to be able to be opened toward the interior, An interior window having a ventilation device that allows air to circulate both inside and outside the room.

2. The opening has a resin frame member that extends from the outer window toward the interior side around all four sides, The frame is positioned inside the picture frame member, The ventilation device is disposed between the frame and the picture frame member, as described in claim 1.

3. The ventilation device is positioned at least between the frame body other than the lower frame and the frame member. The inner window according to claim 2, wherein a reinforcing frame member is provided between the lower frame and the frame member.

4. The reinforcing frame member protrudes further outward than the lower frame and is fixed to the building structure at its outer end. The lower frame is fixed to the reinforcing frame member, as described in claim 3.

5. The aforementioned shoji screen is attached to one of the pair of vertical frames via a hinge so as to be able to be opened and closed. The ventilation device is disposed between the one vertical frame and the frame member, as described in claim 2.

6. The aforementioned shoji screen has a frame body formed by the upper frame, the lower frame, and the pair of vertical frames, The interior window according to claim 1, wherein the ventilation device is provided inside at least one of the upper frame, the lower frame, and the pair of vertical frames of the shoji screen.

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