Interior window

Abstract

To provide an interior window consisting of an opening window with improved sealing properties. [Solution] An inner window installed on the interior side of an outer window provided in an opening in a bathroom, comprising a frame body composed of an upper frame, a lower frame, and a pair of left and right vertical frames; a door stop member provided protruding from the inner circumferential surface of the frame body; and a sliding door housed inside the frame body, which opens toward the interior and closes so as to abut against the door stop member from the interior side, wherein the frame body has screw insertion holes through which screws for fixing to the opening are inserted, the door stop member is attached to the inner circumferential surface of the frame body so as to cover the screw insertion holes, and a sealing material is provided along the interior side boundary between the frame body and the door stop member.

Description

Technical Field

[0006] , , ,

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[0001] The present disclosure relates to an inner window.

Background Art

[0002] Conventionally, it is known to attach an inner window composed of a sliding window to the indoor side of an outer window provided at an opening of a bathroom (see, for example, Patent Document 1).

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventor has found a new problem regarding the sealing performance when an opening window that opens toward the indoor side is provided as an inner window to be attached to a bathroom. That is, an object of the present disclosure is to provide an inner window composed of an opening window with improved sealing performance.

Means for Solving the Problems

[0005] The present disclosure is an inner window attached to the indoor side of an outer window provided at an opening of a bathroom, including a frame body composed of an upper frame, a lower frame, and a pair of left and right vertical frames, a door stop member provided to protrude from the inner peripheral surface of the frame body, and a shoji that is housed inside the frame body and opens toward the indoor side and closes so as to abut against the door stop member from the indoor side. The frame body has a screw insertion hole through which a screw for fixing to the opening is inserted. The door stop member is attached to the inner peripheral surface of the frame body so as to cover the screw insertion hole, and a sealing material is provided along the indoor-side boundary portion between the frame body and the door stop member. The present disclosure relates to an inner window.

Brief Description of the Drawings

[0006] [Figure 1] This is a front view of the interior window according to this embodiment, as seen from the interior side. [Figure 2] This is a vertical cross-sectional view of the interior window along line AA in Figure 1. [Figure 3] This is a cross-sectional view of an interior window along line BB in Figure 1. [Figure 4] This is a perspective view showing the frame and door stopper of the inner window according to this embodiment, disassembled. [Figure 5] This is a front view of the inner window frame and door stopper member as seen from the outside according to this embodiment. [Figure 6] This is a front view of the inner window frame and door stopper member as seen from the interior side, according to this embodiment. [Figure 7] This is a perspective view of the frame and door stop member shown in the cross-section of the interior window according to this embodiment, viewed from diagonally above on the interior side. [Figure 8] This is a perspective view of the frame and door stop member shown in the cross-section of the interior window according to this embodiment, viewed from diagonally downwards on the interior side. [Figure 9] This is a perspective view of the frame and door stop member shown in the cross-section of the interior window according to this embodiment, viewed from diagonally above on the exterior side. [Figure 10] This is a perspective view from the outside of the window showing the connection between the vertical frame and the bottom frame of the interior window according to this embodiment. [Figure 11] This is a cross-sectional view showing the left vertical frame side of an interior window according to another embodiment. [Figure 12] This is an enlarged view of section C in Figure 11. [Modes for carrying out the invention]

[0007] Embodiments of this disclosure will be described in detail below with reference to the drawings. As shown in Figures 1 to 3, the interior window 1 is installed on the interior side of the exterior window 400 (see Figure 11), which is provided in the opening 101 of the bathroom of the building frame 100, at a predetermined distance from the exterior window 400. The exterior window 400 is a sliding window, an outward-opening window, an awning window, etc. However, the exterior window is not shown in Figures 2 to 3 and Figures 7 to 9. The interior window 1 has a door stop member 3 on the inner circumferential surface 240 of the frame 2, and is constructed by housing a sash 4 inside the frame 2 that opens toward the interior and closes so as to abut against the door stop member 3 from the interior side.

[0008] Here, we define the directions shown in each figure. In each figure, X1 indicates the exterior side of the interior window 1, and X2 indicates the interior side of the interior window 1. In the interior window 1, the direction toward the inside of the rectangular frame 2 is defined as the interior, and the direction toward the outside of the rectangular frame 2 is defined as the exterior. In the rectangular frame 2, the surface facing inward is called the inner circumferential surface.

[0009] The frame 2 is constructed by framing an upper frame 2a, a lower frame 2b, and a pair of left and right vertical frames 2c, 2d in a rectangular shape around its perimeter. The upper frame 2a, lower frame 2b, and vertical frames 2c, 2d are made of extruded profiles formed by extrusion molding from metal or resin material. The upper frame 2a, lower frame 2b, and vertical frames 2c, 2d have the same configuration except that their positions on the frame 2 differ vertically (up, down, left, and right), and that the lengths of the upper frame 2a and lower frame 2b and the left and right vertical frames 2c, 2d differ.

[0010] Figure 4 shows the common configuration of the upper frame 2a, lower frame 2b, and vertical frames 2c, 2d. The upper frame 2a, lower frame 2b, and vertical frames 2c, 2d have an exterior wall portion 21 facing the exterior side X1, an interior wall portion 22 facing the interior side X2, an outer peripheral wall portion 23 facing the outside of the frame body 2, and an inner peripheral wall portion 24 facing the inside of the frame body 2, and are formed in a rectangular cross-section with a hollow portion 25 inside.

[0011] Multiple protrusions 231 are provided on the outer circumferential surfaces 230 of the upper frame 2a, lower frame 2b, and vertical frames 2c, 2d. The multiple protrusions 231 are provided so as to project outward from the outer circumferential wall 23. The multiple protrusions 231 extend along the entire length of the upper frame 2a, lower frame 2b, and vertical frames 2c, 2d, and are arranged parallel to each other in the indoor-outdoor direction. A fin member 232 made of resin or rubber is provided at the indoor-side X2 end of the outer circumferential wall 23.

[0012] A pair of protruding pieces 241 and 242 are integrally formed on the inner circumferential surfaces 240 of the upper frame 2a, lower frame 2b, and vertical frames 2c and 2d. The protruding pieces 241 and 242 are provided to protrude inward from the frame body 2 on the outdoor side X1, which is further from the center of the inner circumferential wall portion 24 in the indoor-outdoor direction. The protruding pieces 241 and 242 extend along the length direction of the upper frame 2a, lower frame 2b, and vertical frames 2c and 2d, and are arranged parallel to each other at a predetermined interval in the indoor-outdoor direction. One protruding piece 241 is positioned on the outdoor side X1, and the other protruding piece 242 is positioned on the indoor side X2. One protruding piece 241 is shorter in height than the other protruding piece 242. A locking claw portion 241a is formed at the tip of the protruding piece 241, which is bent toward the outdoor side X1. Multiple locking protrusions 242a are formed on both the outdoor side X1 and the indoor side X2 of the protruding piece 242.

[0013] The inner circumferential wall portion 24 has screw insertion holes 243 formed between a pair of protruding pieces 241 and 242. Multiple screw insertion holes 243 are provided at predetermined intervals along the length of the upper frame 2a, lower frame 2b, and vertical frames 2c and 2d. As shown in Figures 2 and 3, screws SC inserted through the screw insertion holes 243 penetrate the outer circumferential wall portion 23 within the hollow portion 25 and are screwed into the building frame 100 from the inside of the opening 101 to secure it. In this way, the upper frame 2a, lower frame 2b, and vertical frames 2c and 2d constitute a frame body 2 that extends around all four sides of the opening 101. The frame body 2 has a vertically dominant structure in which the upper frame 2a is positioned between the upper ends of the vertical frames 2c and 2d, and the lower frame 2b is positioned between the lower ends of the vertical frames 2c and 2d. Therefore, the pair of protruding pieces 241, 242 of the upper frame 2a and the lower frame 2b are provided along the entire length of the upper frame 2a and the lower frame 2b, whereas the pair of protruding pieces 241, 242 of the vertical frames 2c, 2d are cut out in the portion that contacts the upper frame 2a and the lower frame 2b.

[0014] The door stopper member 3, like the frame 2, is made of an extruded profile formed by extrusion molding from a metal or resin material and is attached to the inner circumferential surface 240 of the frame 2. Specifically, the door stopper member 3 is individually attached to the inner circumferential wall portions 24 of the upper frame 2a, lower frame 2b, and vertical frames 2c, 2d along their respective longitudinal directions. As shown in Figure 4, the door stopper member 3 has an inner circumferential wall portion 31 facing the inside of the frame 2, an outer wall portion 32 extending from the outer-facing end X1 of the inner circumferential wall portion 31 toward the inner circumferential surface 240 of the frame 2, and an inner wall portion 33 extending from the inner-facing end X2 of the inner circumferential wall portion 31 toward the inner circumferential surface 240 of the frame 2. The outer wall portion 32 and the inner wall portion 33 are at the same height from the inner circumferential wall portion 31. The distance between the exterior wall portion 32 and the interior wall portion 33 in the inward-outward direction is formed so that the pair of protruding pieces 241 and 242 of the frame 2 can be sandwiched from both the inward and outward directions. In the door stop member 3, the exterior wall portion 32 and the interior wall portion 33 constitute a pair of engaging pieces that engage with the pair of protruding pieces 241 and 242 of the frame 2.

[0015] At the end of the outdoor side X1 of the inner peripheral wall portion 31, a standing wall portion 311 bent toward the inside of the frame body 2 is integrally formed. However, the standing wall portion 311 is not provided in the door stop member 3 attached to the left and right vertical frames 2c and 2d. At the end of the indoor side X2 of the inner peripheral wall portion 31, a resin or rubber fin member 312 that abuts against the outdoor side X1 surface of the shoji 4 when the shoji 4 described later is closed is provided.

[0016] At the tip of the outdoor wall portion 32, a locking projection 321 that protrudes toward the indoor side X2 and locks from the outdoor side X1 to the locking claw portion 241a of the protruding piece 241 on the outdoor side X1 of the upper frame 2a, the lower frame 2b, and the vertical frames 2c and 2d is integrally formed. On the outdoor side X1 surface of the indoor wall portion 33, an L-shaped clamping piece 331 that clamps the protruding pieces 242 on the indoor side X2 of the upper frame 2a, the lower frame 2b, and the vertical frames 2c and 2d is formed between the indoor wall portion 33. Further, on the outdoor side X1 surface of the indoor wall portion 33, a plurality of locking projections 332 that lock with a plurality of locking projections 242a of the protruding piece 242 clamped between the clamping pieces 331 are formed.

[0017] The door stop member 3 is attached from the inside of the frame body 2 so as to sandwich the pair of protruding pieces 241 and 242 of the lower frame 2b and the vertical frames 2c and 2d between the outdoor wall portion 32 and the indoor wall portion 33. The locking projection 321 of the outdoor wall portion 32 in the door stop member 3 is locked to the locking claw portion 241a of the protruding piece 241 in the upper frame 2a, the lower frame 2b, and the vertical frames 2c and 2d. The clamping piece 331 of the door stop member 3 clamps the protruding pieces 242 of the upper frame 2a, the lower frame 2b, and the vertical frames 2c and 2d between the indoor wall portion 33. As a result, the door stop member 3 is engaged and attached to the inner peripheral surface 240 of the frame body 2 so as to cover the screw insertion hole 243 over the four sides. The door stop member 3 extending over the four sides has a horizontal override structure in which the door stop members 3 of the left and right vertical frames 2c and 2d are arranged between the door stop members 3 of the upper frame 2a and the lower frame 2b as shown in FIGS. 5 and 6.

[0018] As shown in Figures 1 to 3, the shoji screen 4 is constructed by housing glass G inside a frame body 40, which is formed by assembling an upper frame 40a, a lower frame 40b, and a pair of left and right vertical frames 40c, 40d in a rectangular shape. As shown in Figures 1 and 3, a hinge 41 is provided across the vertical frame 40c on the hanging side of the shoji screen 4 and the vertical frame 2c of the frame body 2. A reinforcing plate 251 is provided in the hollow portion 25 of the vertical frame 2c. The hinge 41 is attached to the vertical frame 2c by screwing a screw (not shown) that penetrates the inner peripheral wall portion 24 of the vertical frame 2c into the reinforcing plate 251.

[0019] A cam latch handle 42 is attached to the interior side X2 of the vertical frame 40d on the door edge side of the shoji screen 4. A cam latch receiver 43 that engages with the cam latch handle 42 is provided on the exterior wall portion 21 of the vertical frame 2d of the frame body 2. A reinforcing plate 251 is also provided in the hollow portion 25 of the vertical frame 2d, similar to the vertical frame 2c. As shown in Figure 1, the cam latch receiver 43 is attached to the vertical frame 2d by screwing a screw 431 that penetrates the interior wall portion 22 of the vertical frame 2d into the reinforcing plate 251. Furthermore, as shown in Figure 3, a stay 44 is attached across the upper frame 40a and lower frame 40b of the shoji screen 4 and the upper frame 2a and lower frame 2b of the frame body 2.

[0020] The interior window 1 is an opening window in which the sash 4 is opened towards the interior side X2 and closed towards the exterior side X1. When the user operates the cam latch handle 42 toward the interior side X2, the sash 4 moves toward the interior side X2 around the hinge 41. This opens the inside of the frame 2. When the user operates the cam latch handle 42 toward the exterior side X1, the sash 4 moves toward the exterior side X1 around the hinge 41 and comes into contact with the door stopper member 3 that runs around the inside of the frame 2 from the interior side X2. This closes the inside of the frame 2.

[0021] Next, the sealing structure of the inner window 1 will be described with reference to Figures 5 to 10. In Figures 5 to 10, areas where sealing material is provided are indicated by hatching. The sash 4 is not shown. The sealing structure of the inner window 1 has a frame-side sealing portion 200 and a door stop member-side sealing portion 300. The specific type of sealing material used in the frame-side sealing portion 200 and the door stop member-side sealing portion 300 is not particularly limited as long as it can seal the gap in a watertight manner, and sealing materials commonly used in the construction industry can be used. The sealing material may be either wet or dry.

[0022] As shown in Figures 5 to 9, the frame-side sealing portion 200 is composed of a first sealing portion 201, a second sealing portion 202, and a third sealing portion 203. The first sealing portion 201 is composed of a sealing material provided at the boundary between the exterior wall portions 21 of the upper frame 2a, lower frame 2b, and left and right vertical frames 2c, 2d, and the inner circumferential surface 101a of the opening 101. The second sealing portion 202 is composed of a sealing material provided at the boundary between the interior wall portions 22 of the upper frame 2a, lower frame 2b, and left and right vertical frames 2c, 2d, and the inner circumferential surface 101a of the opening 101. The third sealing portion 203 is composed of sealing materials provided at the boundary where the upper frame 2a and the vertical frames 2c, 2d are connected, and at the boundary where the lower frame 2b and the vertical frames 2c, 2d are connected.

[0023] The first sealing portion 201 and the second sealing portion 202 are provided to fill the gap at the boundary between the upper frame 2a, the lower frame 2b, and the left and right vertical frames 2c and 2d by applying sealant to the respective exterior wall portions 21 and the inner circumferential surface 101a of the opening 101. Figure 10 shows a third sealing portion 203 provided at the boundary between the lower frame 2b and the vertical frame 2d. The third sealing portion 203 is provided at the connection portion between the lower frame 2b and the vertical frame 2d by applying sealant to the exterior wall portion 21, the inner circumferential wall portion 24 and the interior wall portion 22 of the lower frame 2b by filling the gap at the boundary between the two. The third sealing portion 203 is similarly provided at the connection portion between the lower frame 2b and the vertical frame 2c and at the connection portion between the upper frame 2a and the left and right vertical frames 2c and 2d. The first sealing portion 201, the second sealing portion 202, and the third sealing portion 203 are connected to each other. This prevents rainwater from the outdoor side X1 and shower water from the indoor side X2 from entering the inside of the frame 2 and the gap between the frame 2 and the inner surface 101a of the opening 101.

[0024] As shown in Figures 6 to 8, the door stopper side sealing portion 300 is provided along the boundary X2 on the indoor side between the frame 2 and each door stopper 3. More specifically, the door stopper side sealing portion 300 is formed by applying sealant along the respective boundaries between the inner circumferential wall portions 24 of the upper frame 2a, lower frame 2b, and vertical frames 2c, 2d and the indoor wall portions 33 of each door stopper 3. The vertical and horizontal door stopper side sealing portions 300 are connected by the sealing materials connecting to each other. Therefore, the door stopper side sealing portion 300 is continuous along all four sides of the boundary X2 on the indoor side between the frame 2 and each door stopper 3.

[0025] With this inner window 1, even if shower water or the like from the interior side X2 splashes onto the frame 2 when the sash 4 is open, it is prevented from seeping into the interior of the door stop member 3 from the boundary between the frame 2 and each door stop member 3. Since screw insertion holes 243 are formed inside the door stop member 3, if shower water or the like seeps into the interior of the door stop member 3, it may seep into the hollow part 25 of the frame 2 through the screw insertion holes 243 and then into the building structure 100 via the screws SC. However, with this inner window 1, it is possible to effectively prevent shower water or the like from the interior side X2 from seeping into the interior of the door stop member 3, thus improving the sealing performance.

[0026] Figure 11 shows an inner window 1A according to another embodiment. Parts with the same reference numerals as those in the inner window 1 described above indicate parts with the same configuration; therefore, their descriptions may be omitted below, relying on the above description.

[0027] In Figure 11, a resin frame member 5 is provided in the opening 101 of the building frame 100A. The frame member 5 is provided around all four sides of the opening 101. The interior side X2 end of the frame member 5 is fixed to the bathroom wall panel 110 by screws 51. The screws 51 are concealed by resin cover members 52.

[0028] This inner window 1A is positioned on the interior side X2 of the outer window 400, which is attached to the exterior side X1 end of the frame member 5. The frame 2 of the inner window 1A is fixed to the frame member 5 by two screws SCa and SCb. The screws SCa and SCb are provided with anchor plugs. The anchor plugs are configured so that their tip gradually expands in diameter as the screws SCa and SCb are screwed in. Such an inner window 1A also provides the same effect as the inner window 1 described above.

[0029] As shown in Figure 12, the outer peripheral wall portion 23 of the frame 2 is installed away from the inner peripheral surface (inner peripheral surface 5a of the frame member 5) of the opening 101, which is the mounting surface, by the amount of the protruding height of the multiple protruding portions 231. Instead of the fin members 232, a sealing pocket 233 filled with sealing material may be formed at the indoor side X2 end of the outer peripheral wall portion 23. The sealing pocket 233 is formed as a triangular space in cross-section that is recessed on the outdoor side X1 than the indoor wall portion 22 of the frame 2 by forming an inclined protruding portion 234 that protrudes diagonally toward the outdoor side X1 at the indoor side X2 end of the outer peripheral wall portion 23.

[0030] The frame-side sealing portion 200 (the second sealing portion 202 in Figure 12) is formed by filling the sealing material into the sealing pocket 233 from the indoor side X2. Since the sealing pocket 233 is a space with a triangular cross-section, the filled sealing material penetrates deep into the sealing pocket 233 and naturally comes into contact with two surfaces: the frame 2 and the inner circumferential surface of the opening 101 (the inner circumferential surface 5a of the frame member 5). Therefore, the frame-side sealing portion 200 can exhibit a stable sealing function without the risk of variations in sealing function due to the skill of the worker.

[0031] Such sealing pockets 233 are formed around all four sides of the frame 2. The sealing pockets 233 can also be applied to the frame 2 of the inner window 1 described above. The sealing pockets may also be formed in the interior wall portion 33 of the door stop member 3. This makes it possible to further stabilize the sealing function of the door stop member side sealing portion 300.

[0032] In the embodiments described above, the frames of the inner windows 1,1A may be connected to the frames of the outer window 400. This strengthens the mounting strength of the frames of the inner windows 1,1A.

[0033] The following effects are achieved according to the inner window 1,1A according to the above embodiment. Specifically, the inner window 1,1A is installed on the indoor side X2 of an outer window 400 provided in an opening 101 of a bathroom, and comprises a frame body 2 composed of an upper frame 2a, a lower frame 2b, and a pair of left and right vertical frames 2c, 2d, a door stop member 3 that protrudes from the inner circumferential surface 240 of the frame body 2, and a sash 4 that is housed inside the frame body 2 and opens toward the indoor side X2 and closes so as to abut against the door stop member 3 from the indoor side X2, the frame body 2 has screw insertion holes 243 through which screws SC that are fixed to the opening 101 are inserted, the door stop member 3 is attached to the inner circumferential surface 240 of the frame body 2 so as to cover the screw insertion holes 243, and a sealing material (door stop member side sealing portion 300) is provided along the boundary between the frame body 2 and the door stop member 2 on the indoor side X2. According to this, even if shower water or the like from the interior side X2 splashes onto the frame 2 when the shoji screen 4 is open, it is prevented from seeping into the interior of the door stop member 3 from the boundary between the frame 2 and the door stop member 3, thereby improving the sealing performance.

[0034] In the interior windows 1 and 1A, a pair of protruding pieces 241 and 242 are provided on the inner circumferential surface 240 of the frame 2, extending in the longitudinal direction of the frame 2 and arranged side by side in the interior-exterior direction. The door stop member 3 has a pair of engaging pieces (exterior wall portion 32, interior wall portion 33) that engage with the pair of protruding pieces 241 and 242. With this configuration, the door stop member 3 can be easily attached to the inner circumferential surface 240 of the frame 2 by engaging the pair of protruding pieces 241 and 242 with the pair of engaging pieces (exterior wall portion 32, interior wall portion 33).

[0035] In the inner window 1,1A, the screw insertion hole 243 is positioned between a pair of protruding pieces 241 and 242. This arrangement makes it difficult for water, such as shower water, to penetrate the sealing material (door stopper side sealing portion 300) due to a seal failure, and thus improves sealing performance.

[0036] In the interior window 1,1A, the door stop member 3 is provided around all four sides of the frame 2, and the sealing material (door stop member side sealing portion 300) is provided along the boundary between the frame 2 and the door stop member 3 on the interior side X2 around all four sides. This prevents shower water and the like from entering the interior of the door stop member 3 around all four sides of the frame 2.

[0037] This disclosure includes a bathroom window as described in the following embodiments.

[0038] <Aspect 1> An inner window installed on the interior side of an outer window that is provided in the opening of a bathroom, A frame consisting of an upper frame, a lower frame, and a pair of left and right vertical frames, A door stopper member is provided protruding from the inner circumferential surface of the frame, The frame comprises a sliding door that is housed inside the frame and opens toward the interior and closes toward the door stop member from the interior side, The frame has screw insertion holes through which screws for fixing it to the opening are inserted. The door stopper member is attached to the inner circumferential surface of the frame so as to cover the screw insertion hole. An interior window, wherein a sealing material is provided along the boundary on the interior side between the frame and the door stop member.

[0039] <Aspect 2> A pair of protruding pieces are provided on the inner circumferential surface of the frame, extending in the longitudinal direction of the frame and arranged side by side in the indoor-outdoor direction. The inner window according to embodiment 1, wherein the door stopper member has a pair of engaging pieces that engage with the pair of protruding pieces.

[0040] <Aspect 3> The inner window according to embodiment 2, wherein the screw insertion hole is positioned between the pair of protruding pieces.

[0041] <Aspect 4> The door stopper member is provided around all four sides of the frame. The sealing material is provided along the boundary portion extending around the four sides on the interior side between the frame and the door stopper member, as described in any of embodiments 1 to 3. [Explanation of Symbols]

[0042] 1,1A Inner window, 2 Frame, 2a Upper frame, 2b Lower frame, 2c,2d Vertical frame, 240 Inner surface of frame, 241,242 Projecting piece, 243 Screw insertion hole, 3 Door stopper, 32 Exterior wall section (engaging piece), 33 Interior wall section (engaging piece), 4 Sash, 101 Opening, 300 Door stopper side seal section (sealing material), 400 Outer window, SC Screw

Claims

1. An inner window installed on the interior side of an outer window that is provided in the opening of a bathroom, A frame consisting of an upper frame, a lower frame, and a pair of left and right vertical frames, A door stopper member is provided protruding from the inner circumferential surface of the frame, The frame comprises a sliding door that is housed inside the frame and opens toward the interior and closes toward the door stop member from the interior side, The frame has screw insertion holes through which screws for fixing it to the opening are inserted. The door stopper member is attached to the inner circumferential surface of the frame so as to cover the screw insertion hole. An interior window, wherein a sealing material is provided along the boundary on the interior side between the frame and the door stop member.

2. A pair of protruding pieces are provided on the inner circumferential surface of the frame, extending in the longitudinal direction of the frame and arranged side by side in the indoor-outdoor direction. The inner window according to claim 1, wherein the door stopper member has a pair of engaging pieces that engage with the pair of protruding pieces.

3. The inner window according to claim 2, wherein the screw insertion hole is positioned between the pair of protruding pieces.

4. The door stopper member is provided around all four sides of the frame. The interior window according to any one of claims 1 to 3, wherein the sealing material is provided along the boundary portion extending around the four sides on the interior side between the frame and the door stop member.

Images