Attachment Structure, Attachment Method, and Base Unit for Building Accessories

Abstract

To provide a mounting structure, a mounting method, and a substrate unit of a building attachment which are capable of maintaining cut-off performance without forming a hole in a waterproof layer.SOLUTION: In attachment structure of a shutter 1, an upper frame base material 34, a lower frame base material 32, and right and left vertical frame base materials are attached to the shutter 1, which are framed to form a base frame. The upper frame base material 34 and the right and left vertical frame base materials are so fixed to a building skeleton 2 as to face an outer wall material 25 on the outdoor side. The lower frame base material 32 is not attached to an FRP waterproof layer 26, but is so disposed as to face the FRP waterproof layer 26 on the outdoor side with a gap therebetween.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an attachment structure, an attachment method, and a base unit for attaching building accessories such as shutters, louvers, and grids to a building body.

Background Art

[0002] Conventionally, an attachment structure is known in which a louver, which is a building accessory arranged on the outdoor side with respect to a building fixture such as a terrace window, is attached to a building body such as a detached house (see Patent Document 1). The building body includes a building wall portion, an outer wall material and a waterproof layer installed along the building wall portion, and the waterproof layer is located on the indoor side of the outer wall material. The upper frame of the louver is fixed to the building wall portion with screws passing through the outer wall material, and the lower frame of the louver is fixed to the building wall portion with screws passing through the waterproof layer.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the attachment structure described in Patent Document 1, since the screws for fixing the lower frame of the louver to the building body penetrate the waterproof layer, holes are formed in the waterproof layer that connect the outdoor space to the building wall portion, and there is a risk of water leakage from these holes. Therefore, it is necessary to perform a water stop treatment on this hole portion.

[0005] An object of the present invention is to provide an attachment structure, an attachment method, and a base unit for building accessories that can maintain water tightness without forming holes in the waterproof layer.

Means for Solving the Problems

[0006] The attachment structure of the building accessory of the present invention is an attachment structure for attaching a building accessory to a building body in which an opening for installing a fitting is formed. The outer wall surface of the building body is composed of an outer wall material and a waterproof layer that is below the outer wall material and has an expected position on the indoor side. The building accessory is attached with an upper frame base material, a lower frame base material, and left and right vertical frame base materials. The upper frame base material, the lower frame base material, and the left and right vertical frame base materials are framed to form a base frame. The upper frame base material and the left and right vertical frame base materials are fixed to the building body facing the outdoor side with respect to the outer wall material. The lower frame base material is arranged to face the waterproof layer with a space on the outdoor side without being attached to the waterproof layer. The base unit of the present invention is a gap concealing member used in the attachment structure of the building accessory of the present invention, and is composed of a gap concealing member that closes the gap with the fitting or the waterproof layer, and a lower frame base material to which the gap concealing member is attached. The method for attaching a building accessory of the present invention is a method for attaching a building accessory that constitutes the attachment structure of the building accessory of the present invention. Among the base frames used in the attachment structure of the building accessory, the upper frame base material and the left and right vertical frame base materials are fixed to the building body in a state of being in contact with the outer wall material that constitutes the outer wall surface of the building body. The lower frame base material is arranged to face the waterproof layer on the outdoor side without being attached to the waterproof layer that constitutes the outer wall surface of the building body and has an expected position on the indoor side with respect to the outer wall material. The building accessory is attached to the upper frame base material, the lower frame base material, and the left and right vertical frame base materials.

Effects of the Invention

[0007] According to the present invention, it is possible to provide an attachment structure, an attachment method, and a base unit for a building accessory that can maintain water tightness without forming holes in the waterproof layer.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

[0009] [Configuration of the Present Embodiment] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 to 5, the shutter 1 as a building attachment is an exterior fitting arranged on the outdoor side with respect to the sliding window 4 (terrace window), which is a fitting, in the balcony 3 of the building body 2 such as a detached house. In the following description, the left - right direction of the shutter 1 is defined as the X - axis direction, the up - down direction of the shutter 1 is defined as the Y - axis direction, and the prospective direction of the shutter 1 is defined as the Z - axis direction. The X, Y, and Z - axis directions are perpendicular to each other.

[0010] The building body 2 has a building wall portion that forms an opening 5 by an upper wall portion 21, a lower wall portion 22, and left and right side wall portions 23. On the outdoor side of the upper wall portion 21 and the left and right side wall portions 23, an outer wall material 25 (with siding provided) is provided via a sub - floor 24 along the building wall portion. On the outdoor side of the lower wall portion 22 and the lower parts of the left and right side wall portions 23, an FRP waterproof layer 26 is provided via the sub - floor 24. The FRP waterproof layer 26 is formed by impregnating and curing resin in glass fiber (reinforcing material), and is provided to continuously cover the lower wall portion 22 and the floor base of the balcony 3 and is exposed on the outdoor side. Note that the outer wall material 25 is installed above the FRP waterproof layer 26. The outdoor surfaces of the underfloor plates 24 attached to the upper wall portion 21, the lower wall portion 22, and the left and right side wall portions 23 are flush with each other. Since the FRP waterproof layer 26 (waterproof layer, sheet) attached to the underfloor plate 24 has a smaller thickness dimension than the outer wall material 25, the outdoor surface 261 of the FRP waterproof layer 26 (the outer wall surface of the lower wall portion 22) is arranged at a position expected to be recessed more toward the indoor side than the outdoor surface 251 of the outer wall material 25 (the outer wall surfaces of the upper wall portion 21 and the left and right side wall portions 23).

[0011] The offset window 4 is configured by a generally known one and is provided in the opening 5. The shutter 1 includes a frame body 10 and a shutter device 15 attached to the frame body 10. As shown in FIGS. 1 and 2, the frame body 10 includes an upper frame 11, a lower frame 12, and left and right vertical frames 13 formed of aluminum extruded profiles. A shutter curtain 16, which will be described later, is fitted to the left and right vertical frames 13 so as to be vertically movable in the Y-axis direction. As shown in FIG. 2, the shutter device 15 includes a shutter curtain 16 configured by connecting a plurality of slats 161 to be rotatable with respect to each other, a shutter winding shaft 17 capable of winding and unwinding the shutter curtain 16, a motor (not shown) for driving the shutter winding shaft 17, and a shutter case 18 that houses the shutter winding shaft 17 and the motor and is attached to the left and right vertical frames 13.

[0012] As shown in Fig. 2, an upper frame base material 34 is attached to the shutter case 18 along the X-axis direction. The upper frame base material 34 is formed hollow by an aluminum extrusion having indoor and outdoor finding surfaces 341, 342 and upper and lower prospect surfaces 343, 344, and a continuous piece portion 345 continuous with the finding surfaces 341, 342 between the prospect surfaces 343, 344. A stepped portion 347 recessed inside the upper frame base material 34 is formed at the continuous portion of the indoor finding surface 342 and the upper prospect surface 343. The outdoor finding surface 341 of the upper frame base material 34 is screwed to the shutter case 18 with screws 6, and the indoor finding surface 342 is arranged to face the outdoor side with respect to the outer wall material 25 and is screwed to the upper wall portion 21 through the outer wall material 25 and the lower floor board 24 with fixing screws 7. A sealing material 348 is provided between the stepped portion 347 and the outer wall material 25.

[0013] As shown in Fig. 2, an upper frame base material 31 is attached to the upper frame 11 along the X-axis direction. The upper frame base material 31 is formed hollow by an aluminum extrusion having indoor and outdoor finding surfaces 311, 312 and upper and lower prospect surfaces 313, 314. A bent portion 315 bent toward the indoor side is formed on the outdoor finding surface 311, so that the upper portion above the bent portion 315 is arranged on the indoor side more than the lower portion. The outdoor finding surface 311 of the upper frame base material 31 is arranged to face the outdoor side with respect to the outer wall material 25 and is screwed to the upper frame 11 with screws 6, and the indoor finding surface 312 is screwed to the upper wall portion 21 through the outer wall material 25 and the lower floor board 24 with fixing screws 7.

[0014] As shown in Fig. 3, the lower frame 12 has a lower frame base material 32 attached along the X-axis direction. The lower frame base material 32 is formed hollow by an aluminum extrusion profile having indoor and outdoor finding surfaces 321, 322 and upper and lower prospective surfaces 323, 324, and a continuous piece portion 325 continuous with the finding surfaces 321, 322 between the prospective surfaces 323, 324. On the outdoor finding surface 321, a protruding piece portion 326 is formed and arranged in a groove provided at the lower part of the indoor side of the lower frame 12. The protruding piece portion 326 protrudes from the finding surface 321 to the outdoor side and rises obliquely upward. On the continuous portion of the indoor finding surface 322 and the lower prospective surface 324, a stepped portion 327 recessed inside the lower frame base material 32 is formed. This lower frame base material 32 is disposed opposite to the FRP waterproof layer 26 with a space on the outdoor side below the lower frame 12, and the outdoor finding surface 321 is screwed to the lower frame 12 by screws 6. On the other hand, a gap hiding member 35 made of an aluminum extrusion profile is screwed to the indoor finding surface 322 by screws 8. The gap hiding member 35 is arranged to extend along the X-axis direction along the lower frame base material 32, and is formed in an L-shaped cross section having a mounting piece portion 351 along the Y-axis direction and a gap hiding piece portion 352 along the Z-axis direction as shown in Fig. 3. The outdoor surface of the mounting piece portion 351 abuts against the indoor surface of the finding surface 322. A plurality of strip grooves 353 are formed vertically side by side along the longitudinal direction of the gap hiding member 35 on the indoor surface of the mounting piece portion 351. The plurality of strip grooves 353 can be used as marks for screw fastening positioning when screwing the mounting piece portion 351 to the lower frame base material 32. The gap hiding piece portion 352 is arranged to extend from the mounting piece portion 351 to the indoor side in a state where the mounting piece portion 351 is screwed to the lower frame base material 32 and faces the window lower frame 42 of the sliding window 4 in the Y-axis direction. An elastic contact body 354 such as a sponge or a gasket is provided along the longitudinal direction of the gap hiding piece portion 352 on the gap hiding piece portion 352. The elastic contact body 354 is in pressure contact with the window lower frame 42, thereby The single part 35 2 blocking the gap between the gap hiding member 35 and the window lower frame 42 to suppress light leakage.

[0015] As shown in Fig. 4, in the left and right vertical frames 13, the left and right vertical frame base materials 33 are attached along the Y-axis direction. The left and right vertical frame base materials 33 are formed hollow by aluminum extrusion profiles having indoor and outdoor finding surfaces 331, 332 and inner and outer peripheral side prospect surfaces 333, 334. A stepped portion 337 recessed inside the vertical frame base material 33 is formed at the continuous portion of the indoor finding surface 332 and the outer peripheral side prospect surface 334. These left and right vertical frame base materials 33 are arranged on the left and right outer peripheral sides of the left and right vertical frames 13. The outdoor finding surface 331 (excluding the lower part of the vertical frame base material 33 described later) is arranged to face the outdoor side with respect to the outer wall material 25 and is screwed to the left and right vertical frames 13 by screws 6. The indoor finding surface 332 is screwed to the left and right side wall portions 23 via the outer wall material 25 and the lower floor board 24 by fixing screws 7. A sealing material 338 is provided between the stepped portion 337 and the outer wall material 25. As shown in Fig. 5, in the lower part of the left and right vertical frame base materials 33 that face the FRP waterproof layer 26 with a gap in the Z-axis direction, the indoor finding surface 332 is not screwed to the side wall portion 23, and a gap hiding member 35 is attached. The gap hiding member 35 is configured in the same manner as that attached to the lower frame 12, is arranged along the Y-axis direction along the aforementioned lower part of the vertical frame base material 33, the attachment piece portion 351 is screwed to the finding surface 332 by a screw 8, and the gap hiding piece portion 352 is arranged to extend from the attachment piece portion 351 toward the indoor side and faces the window vertical frame 43 of the sliding window 4 in the X-axis direction. The elastic contact body 354 provided on the gap hiding piece portion 352 is in pressure contact with the window vertical frame 43, whereby The single part 35 2 the gap between the gap hiding member 35 and the window vertical frame 43 is blocked to suppress light leakage.

[0016] On the upper frame base materials 31, 34 and the lower frame base material 32 along the X-axis direction, screw holes 36 are formed, and the left and right vertical frame base materials 33 are screwed vertically through the screw holes 36. In the present embodiment, the base frame is constituted by the upper frame base materials 31, 34, the lower frame base material 32 and the left and right vertical frame base materials 33. Further, by attaching the gap hiding member 35 to the lower frame base material 32, the base unit 37 shown in Fig. 7(A) is constituted, and by attaching the gap hiding member 35 to the vertical frame base material 33, the base unit 38 shown in Fig. 7(B) is constituted. At the corner where the lower frame base material 32 and the vertical frame base material 33 are connected, as shown in Fig. 6, the elastic contact body 354 provided on the lower frame base material 32 is in pressure contact with the elastic contact body 354 provided on the vertical frame base material 33, thereby suppressing light leakage around the corner.

[0017] Hereinafter, the assembly of the mounting structure of the shutter 1 will be described. First, the upper frame base materials 31, 34, the lower frame base material 32 and the left and right vertical frame base materials 33 are framed vertically to constitute the base frame. Next, the gap hiding member 35 is attached to the lower frame base material 32. Thereafter, the gap hiding member 35 is attached to the lower parts of the left and right vertical frame base materials 33. At this time, the elastic contact body 354 of the gap hiding member 35 on the vertical frame base material 33 side is pressed against the elastic contact body 354 of the gap hiding member 35 on the lower frame base material 32 side. Thereby, the elastic contact bodies 354 of the gap hiding members 35 of the lower frame base material 32 and the vertical frame base material 33 are in pressure contact with each other and are in close contact with each other to such an extent that no light leakage occurs. Next, fix this base frame to the building body 2. Specifically, drive temporary screws into the building body 2, hook the base frame onto the temporary screws, and perform temporary positioning. At this time, press the elastic contact body 354 of the gap hiding member 35 attached to the lower frame base material 32 against the window sill 42 of the sliding window 4, and press the elastic contact body 354 of the gap hiding member 35 attached to the left and right vertical frame base materials 33 against the window vertical frame 43 of the sliding window 4. Thereby, the gaps between the sliding window 4 and the lower part of the lower frame base material 32 and the vertical frame base material 33 are blocked. After the temporary positioning, while the upper frame base materials 31, 34 and the vertical frame base material 33 (excluding the lower part) are in contact with the outer wall material 25, screw through the outer wall material 25 and the sub-floor 24 with the fixing screws 7 and screw-fix (final fixing) to the building wall part. Finally, attach the shutter 1. Specifically, screw-fix the shutter case 18 to the upper frame base material 34 with the screws 6, screw-fix the upper frame 11 to the upper frame base material 31 with the screws 6, screw-fix the lower frame 12 to the lower frame base material 32 with the screws 6, and screw-fix the left and right vertical frames 13 to the left and right vertical frame base materials 33 with the screws 6. In this way, a mounting structure of the shutter 1 for the building body 2 with the sliding window 4 installed is constituted.

[0018] [Modification Example] In the above embodiment, the gap hiding member 35 is formed in an L-shaped cross-section, but in addition, it may have various shapes such as a T-shaped cross-section, a Z-shaped cross-section, an I-shaped cross-section, a U-shaped cross-section, and a square-shaped cross-section. In the above embodiment, the gap hiding member 35 is attached to both the lower part of the lower frame base material 32 and the vertical frame base material 33, but when it is not necessary or the need is low to suppress light leakage between the shutter 1 and the sliding window 4, it may be attached to only one of them, or may not be attached to both. In the above embodiment, the elastic contact bodies 354 of the gap hiding member 35 attached to both the lower part of the lower frame base material 32 and the vertical frame base material 33 are pressed against each other to suppress light leakage between them, but when it is not necessary or the need is low to suppress this light leakage, the elastic contact bodies 354 may be arranged apart from each other. In the above-described embodiment, the upper frame base materials 31 and 34 and the left and right vertical frame base materials 33 (excluding the lower part) are fixed to the building structure 2 in a contact state along the outer wall material 25, but a spacer or the like may be interposed between them and the outer wall material 25. In the above-described embodiment, there are two upper frame base materials 31 and 34, but if the shutter 1 can be sufficiently attached, it may be made into one. When there is one upper frame base material, it may be disposed between the upper frame base materials 31 and 34 in the above-described embodiment. In the above-described embodiment, the gap concealing member 35 is attached to the finding surface portion 322 of the lower frame base material 32, but if it can close the gap generated by the lower frame base material 32 not contacting the FRP waterproof layer 26, it may be attached to other locations. Also, the gap concealing member 35 attached to the lower part of the finding surface portion 332 of the vertical frame base material 33 may be attached to other locations in the same manner as described above. In the previous embodiment, the gap concealing member 35 is configured and arranged to conceal the gap with the sliding window 4, but it is not limited to this. It may be configured and arranged such that an elastic contact body 354 or the like contacts the FRP waterproof layer 26 on the outer peripheral side of the sliding window 4. Even in this case, light leakage from between the lower frame base material 32 or the vertical frame base material 33 and the sliding window 4 can be suppressed. In the above-described embodiment, the shutter 1 includes a frame body (quadrilateral frame) formed by framing the upper frame 11, the lower frame 12, and the left and right vertical frames 13, but it is not limited to this. It is also possible to include a frame body (triangular frame) excluding the lower frame 12. Also, a base frame (quadrilateral base frame) is formed by framing the upper frame base material 34, the lower frame base material 32, and the left and right vertical frame base materials 33, but it is also possible to form a base frame (triangular base frame) excluding the lower frame base material 32. In the above-described embodiment, separate upper frame base materials 31 and 34, lower frame base material 32, and left and right vertical frame base materials 33 are attached to the shutter case 18, the upper frame 11, the lower frame 12, and the left and right vertical frames 13, but it is not limited to this. It is also possible to integrally form the upper frame base materials 31 and 34, the lower frame base material 32, and the left and right vertical frame base materials 33 with the shutter case 18, the upper frame 11, the lower frame 12, and the left and right vertical frames 13. In the above-described embodiment, the shutter 1 is attached to the base frame after the base frame is fixed to the building body 2. However, the present invention is not limited to this, and the base frame may be fixed to the building body 2 after the base frame is attached to the shutter 1. In the above-described embodiment, the sliding window 4 is used as a fitting. However, the present invention is not limited to this, and various other windows and other fittings may be used. Further, the shutter 1 (exterior fitting) is used as an attachment for a building. However, the present invention is not limited to this, and various other attachments for a building may be used.

[0019] [Summary of the present invention] The attachment structure of the building attachment of the present invention is an attachment structure for attaching a building attachment to a building body in which an opening for installing a fitting is formed. The outer wall surface of the building body is composed of an outer wall material and a waterproof layer that is below the outer wall material and whose expected position is on the indoor side. An upper frame base material, a lower frame base material, and left and right vertical frame base materials are attached to the building attachment. The upper frame base material, the lower frame base material, and the left and right vertical frame base materials are framed to form a base frame. The upper frame base material and the left and right vertical frame base materials are fixed to the building body so as to face the outdoor side with respect to the outer wall material. The lower frame base material is arranged to face the waterproof layer with a space therebetween on the outdoor side. According to the attachment structure of the building attachment of the present invention, since three sides of the base frame, that is, the upper frame base material and the left and right vertical frame base materials are fixed to the building body, sufficient attachment strength of the building attachment can be obtained without fixing the lower frame base material framed with these to the building body by screws or the like. For this reason, by fixing the lower frame base material to the building body with screws or the like, screw holes or the like are not formed in the waterproof layer, and the waterproofing of the waterproof layer can be maintained without separately performing a water stop treatment.

[0020] In the attachment structure of the building attachment of the present invention, the lower frame base material is arranged on the lower side of the fitting, and a gap hiding member for closing a gap between the fitting or the waterproof layer may be attached to the lower frame base material. According to such a configuration, by installing the above-described gap hiding member, light leakage from between the lower frame base material and the fitting can be suppressed.

[0021] In the attachment structure of the building accessory of the present invention, the vertical frame base material is arranged on the left and right outer peripheral sides of the fitting, and the lower part of the vertical frame base material is arranged to face the outdoor side with respect to the waterproof layer. At the lower part of the vertical frame base material, a gap is arranged in A gap hiding member may be attached. According to such a configuration, by installing the above-described gap hiding member, light leakage from between the lower part of the vertical frame base material and the fitting can be suppressed.

[0022] In the attachment structure of the building accessory of the present invention, the gap hiding member has an attachment piece part attached to the base frame and a gap hiding piece part continuous with the attachment piece part. An elastic contact body that presses against the fitting or the waterproof layer may be installed on the gap hiding piece part. According to such a configuration, the attachment piece part is attached in advance to the lower frame base material or the vertical frame base material, and when these are fixed to the building body, the elastic contact body is pressed against the fitting, so that the gap between the lower frame base material or the vertical frame base material and the fitting or the waterproof layer can be tightly closed and light leakage can be suppressed.

[0023] In the attachment structure of the building accessory of the present invention, the lower frame base material is arranged below the fitting. On the finding surface part of the lower frame base material facing the waterproof layer, a gap is arranged in A gap hiding member is attached. The vertical frame base material is arranged on the left and right outer peripheral sides of the fitting, and the lower part of the vertical frame base material is arranged to face the outdoor side with respect to the waterproof layer. On the finding surface part of the lower part of the vertical frame base material facing the waterproof layer, a gap is arranged in A gap hiding member is attached. The gap hiding member has an attachment piece part attached to the base frame and a gap hiding piece part continuous with the attachment piece part. An elastic contact body that presses against the fitting is installed on the gap hiding piece part. The elastic contact body of the gap hiding member attached to one of the lower frame base material and the vertical frame base material presses against the elastic contact body of the gap hiding member attached to the other of the lower frame base material and the vertical frame base material. According to such a configuration, in the corner portion constituted by the lower frame base material and the vertical frame base material, the elastic contact bodies of the gap hiding members can be pressed against each other, and light leakage from around the corner portion can be suppressed.

[0024] The base unit of the present invention is characterized by being constituted by the above-described gap hiding member and the lower frame base material to which the gap hiding member is attached. According to such a configuration, a base unit capable of exhibiting the same effects as the attachment structure of the building accessory of the present invention described above can be configured.

[0025] The base unit of the present invention is characterized by being constituted by the above-described gap hiding member and the vertical frame base material to which the gap hiding member is attached. According to such a configuration, a base unit capable of exhibiting the same effects as the attachment structure of the building accessory of the present invention described above can be configured.

[0026] The method for attaching a building accessory of the present invention is a method for attaching a building accessory to a building body in which an opening for installing a fitting is formed, and the upper frame base material, the lower frame base material, and the left and right vertical frame base materials constituting the above-described base frame are fixed to the building body in a state of being in contact with the outer wall material constituting the outer wall surface of the building body, and the lower frame base material is disposed to face the outdoor side with respect to a waterproof layer that constitutes the outer wall surface of the building body and has a projected position on the indoor side with respect to the outer wall material, and the building accessory is attached to the upper frame base material, the lower frame base material, and the left and right vertical frame base materials. According to the method for attaching a building accessory of the present invention, a method for attaching a building accessory capable of exhibiting the same effects as the attachment structure of the building accessory of the present invention described above can be configured.

[0027] In the method for attaching a building accessory of the present invention, an attachment piece portion of the above-described gap hiding member is attached to at least one of the lower frame base material and the vertical frame base material, and the at least one base material may be fixed to the building body in a state where the elastic contact body of the gap hiding member is pressed against the fitting. According to such a configuration, the gaps between the lower frame base material, the vertical frame base material, and the furniture can be tightly sealed, suppressing light leakage.

Description of Reference Numerals

[0028] 1…Shutter (an accessory for a building), 10…Frame body, 11…Upper frame, 12…Lower frame, 13…Vertical frame, 18…Shutter case, 2…Building body, 25…Outer wall material, 26…FRP waterproof layer (waterproof layer), 3…Balcony, 31, 34…Upper frame base material, 32…Lower frame base material, 33…Vertical frame base material, 35…Gap hiding member, 351…Mounting piece portion, 352…Gap hiding piece portion, 353…Groove, 354…Elastic contact body, 37, 38…Base unit, 4…Sliding window (furniture), 42…Window lower frame, 43…Window vertical frame, 5…Opening, 6, 8…Screw, 7…Fixing screw.

Claims

1. An attachment structure for attaching a building accessory to a building body having an opening where a fitting is installed, wherein the outer wall surface of the building body is composed of an outer wall material and a waterproof layer that is below the outer wall material and has an expected position on the indoor side, the building accessory has an upper frame base material, a lower frame base material, and left and right vertical frame base materials attached thereto, the upper frame base material, the lower frame base material, and the left and right vertical frame base materials are framed to form a base frame, the upper frame base material and the left and right vertical frame base materials are fixed to the building body so as to face the outdoor side with respect to the outer wall material, the lower frame base material is arranged to face the waterproof layer with a space therebetween on the outdoor side without being attached to the waterproof layer, characterized in that it is an attachment structure for a building accessory.

2. In the attachment structure for a building accessory according to Claim 1, the lower frame base material is arranged below the fitting, and a gap hiding member arranged in a gap between the fitting or the waterproof layer is attached to the lower frame base material. characterized in that it is an attachment structure for a building accessory.

3. In the attachment structure for a building accessory according to Claim 2, the gap hiding member has an attachment piece portion attached to the base frame and a gap hiding piece portion continuous with the attachment piece portion, and an elastic contact body that presses against the fitting or the waterproof layer is installed on the gap hiding piece portion. characterized in that it is an attachment structure for a building accessory.

4. It is composed of a gap hiding member used in the attachment structure for a building accessory according to Claim 2 and a lower frame base material to which the gap hiding member is attached. characterized in that it is a base unit.

5. An attachment method for a building accessory that constitutes the attachment structure for a building accessory according to any one of Claims 1 to 3, fixing the upper frame base material and the left and right vertical frame base materials of the base frame used in the attachment structure for the building accessory to the building body in a state of being in contact along the outer wall material that constitutes the outer wall surface of the building body, the lower frame base material is arranged to face the waterproof layer on the outdoor side without being attached to the waterproof layer that constitutes the outer wall surface of the building body and has an expected position on the indoor side with respect to the outer wall material, the building accessory is attached to the upper frame base material, the lower frame base material, and the left and right vertical frame base materials. characterized in that it is an attachment method for a building accessory.

6. In the attachment method for a building accessory according to Claim 5, At least one of the base materials of the lower frame base material and the vertical frame base material is attached with an attachment piece portion of a gap hiding member used in the attachment structure of the building attachment according to claim 3, and the at least one base material is fixed to the building frame in a state where the elastic contact body of the gap hiding member is pressed against the fitting. A method for attaching a building attachment, characterized by the above.

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