Construction method of refitted building fixtures

Abstract

To provide a construction method of a renovation fitting capable of improving the assembled strength.SOLUTION: A construction method of a renovation fitting 1 includes: a step of assembling an attachment frame by assembling an attachment upper frame 31, an attachment lower frame 32, and a pair of attachment vertical frames 33 onto an outer periphery of a new frame 2 which is formed of four peripheries assembled together; and after the step of assembling the attachment frame, a step of fastening the attachment frame by fixing the attachment upper frame 31 and the attachment vertical frames 33 with fastening members 34, and fixing the attachment lower frame 32 and the attachment vertical frames 33 with the fastening members 34.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present disclosure relates to a construction method for refitted fittings.

Background Art

[0002] Conventionally, as a method for refitting an opening of a building by renovation or the like, a covering method of installing new fittings at the opening has been adopted. In the refitted fittings refitted by this covering method, a new frame is attached to the inner peripheral side of an existing frame attached to the opening of the building (see, for example, Patent Document 1).

[0003] In the refitted fittings described in Patent Document 1, a joint member is provided between the existing frame and the new frame. The joint member has an upper frame joint member, a lower frame joint member, and a pair of vertical frame joint members. When attaching the new frame to the existing frame, after screwing the upper frame joint member to the lower part of the existing upper frame, the new frame to which the lower frame joint member and the pair of vertical frame joint members are attached is attached to the inner peripheral side of the existing frame.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In the refitted fittings described in Patent Document 1, the upper frame joint member is fixed first, and the new frame to which the lower frame joint member and the pair of vertical frame joint members are attached is assembled later. It is required to improve the assembling strength.

[0006] An object of the present disclosure is to provide a construction method for refitted fittings capable of improving the assembling strength.

Means for Solving the Problems

[0007] The present disclosure relates to a method for constructing a retrofit fitting attached to an existing frame provided in an opening of a building. The retrofit fitting includes a newly installed frame formed by assembling four sides, and an attachment frame attached to the inner peripheral side of the existing frame in a state where the four sides are assembled and attached to the outer periphery of the newly installed frame. The newly installed frame has a newly installed upper frame, a newly installed lower frame, and a pair of newly installed vertical frames. The attachment frame has an attachment upper frame, an attachment lower frame, and a pair of attachment vertical frames. An attachment frame assembly step of assembling the attachment upper frame, the attachment lower frame, and the pair of attachment vertical frames to the outer periphery of the newly installed frame formed by assembling four sides, and after the attachment frame assembly step, an attachment frame fastening step of fixing the attachment upper frame and the attachment vertical frames with fastening members, and fixing the attachment lower frame and the attachment vertical frames with fastening members.

Brief Description of the Drawings

[0008]

Figure 1

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Embodiments for Carrying Out the Invention

[0009] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The remodeling fitting 1 according to this embodiment is a remodeling fitting 1 for remodeling that forms a new member while the existing frame 6 fixed to the building 100 remains attached to the building 100.

[0010] In this specification, the "viewing direction" means the surface direction of the facing material of the shoji 10 in the remodeling fitting 1 housed in the opening formed in the wall of the building 100, and the "depth direction" means the thickness direction (i.e., the depth direction) of the facing material. The "depth direction" is also the indoor-outdoor direction. In the drawings, the outdoor side of the remodeling fitting 1 is designated as the outdoor side X1, and the indoor side of the remodeling fitting 1 is designated as the indoor side X2. The lateral direction of the remodeling fitting 1 is referred to as the "left-right direction".

[0011] As shown in FIGS. 1 to 7, the remodeling fitting 1 according to this embodiment is a sliding window type remodeling sash housed in the opening of the building 100. The remodeling fitting 1 is attached to the existing frame 6 provided in the opening of the building 100.

[0012] As shown in FIGS. 1 to 7, the remodeling fitting 1 includes a new frame 2, an attachment frame 3 attached to the inner side of the existing frame 6 in a state of being attached to the outer periphery of the new frame 2, indoor decorative members 41, 42, 43 (cover materials), outdoor decorative covers 51, 52, 53 (cover materials), and shojis 10, 10 slidably housed in the new frame 2. The existing frame 6 is provided in the opening of the building 100. The new frame 2 is attached to the inner side of the existing frame 6 in a state where the attachment frame 3 is attached to the outer periphery. The attachment frame 3 is disposed between the existing frame 6 and the new frame 2.

[0013] First, the configuration of the existing frame 6 will be described. As shown in FIGS. 2 and 3, the existing frame 6 is provided inside the opening of the building 100 and is formed in a frame shape assembled in a rectangle. The existing frame 6 includes an existing upper frame 61, an existing lower frame 62, and left and right existing vertical frames 63.

[0014] As shown in FIG. 2, the existing upper frame 61 is attached to the upper side of the opening of the building 100 and has guide rails 611 and 612 for an existing shoji screen that are erected downward. The portion on the indoor side X2 of the existing upper frame 61 is fixed to the building 100 (the building structure).

[0015] As shown in FIG. 3, the existing lower frame 62 is attached to the lower side of the opening of the building 100 and has guide rails 621 and 622 for an existing shoji screen that are erected upward. The portion on the indoor side X2 of the existing lower frame 62 is fixed to the building 100 (the building structure).

[0016] As shown in FIG. 3, the existing vertical frames 63 are respectively attached to the left and right vertical portions on the outdoor side X1 of the opening of the building 100. The portion on the indoor side X2 of the existing vertical frames 63 is fixed to the building 100 (the building structure).

[0017] As shown in FIGS. 8 and 9, the new frame 2 is attached to the existing frame 6 with the attachment frame 3 attached to its outer periphery. The new frame 2 is formed by assembling its four sides and is attached to the inner peripheral side of the existing frame 6 via the attachment frame 3.

[0018] The new frame 2 includes a new upper frame 21, a new lower frame 22, and left and right new vertical frames 23. The new frame 2 is screwed at the combination portions of the new upper frame 21, the new lower frame 22, and the left and right new vertical frames 23 when assembled on all four sides. The attachment frame 3 includes an attachment upper frame 31, an attachment lower frame 32, and left and right attachment vertical frames 33.

[0019] As shown in FIG. 10, the new upper frame 21 is attached to the inner peripheral side of the existing upper frame 61 with the attachment upper frame 31 sandwiched therebetween in a state where the new frame 2 with the attachment frame 3 attached to its outer periphery is attached to the existing frame 6. The new upper frame 21 has guide rails 211 and 212 on the upper side of the upper portions of the shoji screens 10, 10 that are erected downward.

[0020] The newly installed lower frame 22 is attached to the inner peripheral side of the existing lower frame 62 with the attachment lower frame 32 sandwiched therebetween, as shown in FIG. 10, in a state where the newly installed frame 2 with the attachment frame 3 attached to its outer periphery is attached to the existing frame 6. The newly installed lower frame 22 has guide rails 221 and 222 on the lower side of the shoji 10, 10 erected upward.

[0021] The newly installed vertical frame 23 is attached to the inner peripheral side of the existing vertical frame 63 with the attachment vertical frame 33 sandwiched therebetween, as shown in FIG. 11, in a state where the newly installed frame 2 with the attachment frame 3 attached to its outer periphery is attached to the existing frame 6.

[0022] The newly installed upper frame 21, the newly installed lower frame 22, and the newly installed vertical frame 23 are formed of, for example, a metal material or a resin material. As shown in FIGS. 10 and 11, resin angle members 213, 223, and 233 are provided on the indoor side X2 of the newly installed upper frame 21, the newly installed lower frame 22, and the newly installed vertical frame 23, respectively. The resin angle members 213, 223, and 233 are each arranged with a space between them and the frame member 101.

[0023] The above-mentioned newly installed frame 2 (the newly installed upper frame 21, the newly installed lower frame 22, and the left and right newly installed vertical frames 23) is attached to the inner peripheral side of the existing frame 6 (the existing upper frame 61, the existing lower frame 62, and the left and right existing vertical frames 63) in a state where the attachment frame 3 (the attachment upper frame 31, the attachment lower frame 32, and the left and right attachment vertical frames 33) is provided by assembling the four sides on the outer periphery.

[0024] The attachment frame 3 is attached by assembling the four sides on the outer periphery of the newly installed frame 2. The attachment frame 3 is attached to the inner peripheral side of the existing frame 6 in a state where it is attached by assembling the four sides on the outer periphery of the newly installed frame 2.

[0025] As shown in FIGS. 8 and 9, the attachment frame 3 is configured by arranging the attachment upper frame 31, the attachment lower frame 32, and a pair of attachment vertical frames 33 on the four sides and assembling them into a rectangle. The attachment upper frame 31, the attachment lower frame 32, and the left and right attachment vertical frames 33 are each formed of, for example, an aluminum material.

[0026] The attachment upper frame 31 is disposed at the upper part of the attachment frame 3 and extends in the left - right direction (lateral direction). The attachment lower frame 32 is disposed on the lower side of the attachment frame 3 and extends in the left - right direction (lateral direction). The attachment vertical frame 33 is disposed on the end side in the left - right direction of the attachment frame 3 and extends in the up - down direction.

[0027] As shown in FIG. 8, the attachment frame 3 is configured by a so - called vertical - win structure in which the longitudinal ends of the attachment vertical frame 33 are arranged outside the longitudinal ends of the attachment upper frame 31 and the attachment lower frame 32 so as to cover the longitudinal ends of the attachment upper frame 31 and the attachment lower frame 32.

[0028] When the attachment frame 3 is attached to the inner peripheral side of the existing frame 6, it is disposed between the new frame 2 and the existing frame 6. As shown in FIG. 12, the attachment upper frame 31 is attached in a state of being hooked on the new upper frame 21. As shown in FIG. 13, the attachment lower frame 32 is attached in a state of being hooked on the new lower frame 22. As shown in FIGS. 14 and 15, the attachment vertical frame 33 is attached in a state of being hooked on the new vertical frame 23. Note that the attachment frame 3 (attachment upper frame 31, attachment lower frame 32, attachment vertical frame 33) may be fastened by screw fixation or the like without being hooked on the new frame 2 (new upper frame 21, new lower frame 22, new vertical frame 23).

[0029] As shown in FIGS. 16 and 17, the attachment frame 3 has an attachment upper frame 31, an attachment lower frame 32, and a pair of attachment vertical frames 33. In a state where they are attached to the outer periphery of the new frame 2, among the attachment upper frame 31, the attachment lower frame 32, and the pair of attachment vertical frames 33, at the assembly portions of any two frames, they are fixed to each other by screws 34 (fastening members). Specifically, the upper and lower end portions of each of the pair of attachment vertical frames 33 are fixed to both end portions in the longitudinal direction of the attachment upper frame 31 by screws 34, and the upper and lower end portions of each of the pair of attachment vertical frames 33 are fixed to both end portions in the longitudinal direction of the attachment lower frame 32 by screws 34.

[0030] As shown in FIG. 10, the attachment upper frame 31 has an outdoor-side indoor-outdoor direction extending portion 311, an attachment upper frame hollow portion 312 (hollow portion) with an outer peripheral-side flat surface 312a formed thereon, an outdoor-side vertical direction extending plate portion 313 (finding direction extending plate portion), an indoor-side horizontal extending plate 314 (extending plate), an indoor-side lower extending portion 315, an indoor-side lower-end horizontal protruding piece 316, and an L-shaped hanging piece 317.

[0031] The outdoor-side indoor-outdoor direction extending portion 311 and the attachment upper frame hollow portion 312 are arranged side by side in the indoor-outdoor direction. The outdoor-side indoor-outdoor direction extending portion 311 is arranged on the outdoor side X1, and the attachment upper frame hollow portion 312 is arranged on the indoor side X2. The outdoor-side indoor-outdoor direction extending portion 311 is formed at a position lower than the upper surface of the attachment upper frame hollow portion 312.

[0032] The outdoor-side vertical direction extending plate portion 313 is formed in a plate shape that extends upward from the outdoor-side X1 end portion of the outdoor-side indoor-outdoor direction extending portion 311. The outdoor-side vertical direction extending plate portion 313 is arranged on the outdoor side X1 and extends in the vertical direction (finding direction). A pair of engaging protrusions 313a are formed on the lower side of the outdoor-side X1 surface of the outdoor-side vertical direction extending plate portion 313, and are spaced apart vertically. A pair of engaging protrusions 55 of the outdoor-side decorative cover 51 are engaged and attached to the pair of engaging protrusions 313a.

[0033] At the upper part of the attachment upper frame 31, as shown in Fig. 18, a horizontal gutter structure part 310 is formed. The horizontal gutter structure part 310 is formed by the upper surface of the outdoor-side indoor-outdoor direction extending part 311, the outdoor-side surface of the attachment upper frame hollow part 312 at X1, and the indoor-side surface of the lower side of the outdoor-side up-down direction extending plate part 313 at X2. The horizontal gutter structure part 310 is formed at the upper part of the attachment upper frame 31, is formed to be open upward, and extends in the left-right direction (horizontal direction). Both longitudinal ends of the horizontal gutter structure part 310 are formed to be open to the outside in the left-right direction. The water that has entered the horizontal gutter structure part 310 flows to both longitudinal ends of the attachment upper frame 31 in the longitudinal direction, and through the longitudinal ends that are open to the outside in the left-right direction, passes through the notch part 337 of the attachment vertical frame 33, and flows into the inside of the attachment vertical frame 33.

[0034] As shown in Fig. 10, the attachment upper frame hollow part 312 is formed in an elongated rectangular hollow shape extending in the indoor-outdoor direction. On the upper surface of the attachment upper frame hollow part 312, an outer peripheral side plane 312a is formed. The outer peripheral side plane 312a is formed on the outer peripheral side of the attachment frame 3 in the attachment upper frame 31. The outer peripheral side plane 312a faces the existing upper frame 61 and is formed in a planar shape extending in the indoor-outdoor direction and the horizontal direction. The outer peripheral side plane 312a is formed over the entire longitudinal direction of the attachment upper frame 31 and is formed facing upward.

[0035] The outer peripheral side plane 312a is formed in a planar shape so as not to hit the inner peripheral side of the existing frame 6 when the attachment frame 3 with the new frame 2 attached is attached to the inner peripheral side of the existing frame 6. In the present embodiment, as shown in Fig. 12, on the outer peripheral side of the attachment upper frame 31, from the upper space of the outer peripheral side plane 312a to the space in front of the outdoor-side up-down direction extending plate part 313 from the indoor side X2 to the outdoor side X1, and from the space in front of the outdoor-side up-down direction extending plate part 313 to the upper space, an L-shaped space S1 is formed as shown by a virtual line (two-dot chain line). The L-shaped space S1 is formed along the indoor-side surface of the outdoor-side up-down direction extending plate part 313 at X2 and the outer peripheral side plane 312a on the outer peripheral side of the attachment upper frame 31.

[0036] As a result, since the existing upper frame 61 can be accommodated in the L-shaped space S1, the attachment frame 3 with the new frame 2 attached can be easily attached to the existing frame 6. In particular, in the present embodiment, as shown in FIG. 10, since the outer peripheral side plane 312a is formed along the indoor-outdoor direction of the attachment upper frame 31, the attachment upper frame 31 with the new upper frame 2 attached can be attached to the existing upper frame 61 so as not to interfere when attaching, corresponding to existing frames 6 of various shapes.

[0037] As shown in FIG. 10, the indoor side horizontal extension plate 314 extends horizontally in the indoor side X2 direction from the end of the indoor side X2 at the upper end of the attachment upper frame hollow portion 312. The indoor side plane 314a on the outer peripheral side of the attachment frame 3 in the indoor side horizontal extension plate 314 is formed on the same plane as the outer peripheral side plane 312a of the attachment upper frame hollow portion 312. The indoor side plane 314a is formed in a planar shape over the entire longitudinal direction of the attachment upper frame 31.

[0038] When the attachment frame 3 is fixed to the building 100 (frame), the screw 36 is passed through the indoor side horizontal extension plate 314. As a result, the indoor side horizontal extension plate 314 is fixed to the building 100 (frame) by the screw 36. When a gap is formed between the indoor side plane 314a of the indoor side horizontal extension plate 314 and the frame member 101, the spacer member 37 is arranged. The spacer member 37 is composed of a plurality of sheets, and the thickness of the sheet for filling the gap is set according to the size of the gap between the indoor side plane 314a of the indoor side horizontal extension plate 314 and the frame member 101.

[0039] The indoor side downward extension portion 315 extends downward from the lower end portion of the end of the indoor side X2 of the attachment upper frame hollow portion 312. The indoor side lower end horizontal protruding piece 316 protrudes into the indoor side X2 from the lower end portion of the indoor side downward extension portion 315.

[0040] The L-shaped hook piece 317 protrudes downward in an L-shape from the outdoor side X1 portion of the lower surface of the outdoor-side indoor-outdoor direction extending portion 311. When attaching the attachment upper frame 31 to the newly installed upper frame 21, as shown in FIG. 12, the L-shaped hook piece 317 is hooked on the protruding hook piece 214 of the newly installed upper frame 21. Note that, as a structure for fixing the attachment upper frame 31 to the newly installed upper frame 21, instead of a hooking structure, a structure fastened by screw fixing or the like may be used.

[0041] As shown in FIG. 10, the attachment lower frame 32 includes an indoor-outdoor direction extending portion 321, an attachment lower frame hollow portion 322 (hollow portion) in which an outer peripheral side plane 322a is formed, an outdoor-side vertical direction extending plate portion 323 (finding direction extending plate portion), an indoor-side horizontal extending plate 324 (extending plate), an indoor-side upper extending portion 325, and an L-shaped hook piece 326.

[0042] The indoor-outdoor direction extending portion 321 and the attachment lower frame hollow portion 322 are arranged side by side in the indoor-outdoor direction. The indoor-outdoor direction extending portion 321 is arranged on the outdoor side X1, and the attachment lower frame hollow portion 322 is arranged on the indoor side X2. The indoor-outdoor direction extending portion 321 is formed at a position lower than the upper surface of the attachment lower frame hollow portion 322.

[0043] The outdoor-side vertical direction extending plate portion 323 is formed in a plate shape extending downward from the outdoor-side X1 end of the attachment lower frame hollow portion 322. The outdoor-side vertical direction extending plate portion 323 is arranged on the outdoor side X1 and extends in the vertical direction (finding direction). On the upper side of the outdoor-side X1 surface of the outdoor-side vertical direction extending plate portion 323, a pair of engaging protrusions 323a arranged vertically apart are formed. A pair of engaging protrusions 55 of the outdoor-side decorative cover 51 are engaged and attached to the pair of engaging protrusions 323a.

[0044] The attachment lower frame hollow portion 322 is formed in an elongated rectangular hollow shape extending in the indoor-outdoor direction. On the lower surface of the attachment lower frame hollow portion 322, an outer peripheral side plane 322a is formed. The outer peripheral side plane 322a is formed on the outer peripheral side of the attachment frame 3 in the attachment lower frame 32. The outer peripheral side plane 322a is formed in a planar shape that faces the existing lower frame 62 and extends in the indoor-outdoor direction and the horizontal direction. The outer peripheral side plane 322a is formed over the entire longitudinal direction of the attachment lower frame 32 and faces downward.

[0045] The outer peripheral side plane 322a is formed in a planar shape so as not to contact the inner peripheral side of the existing frame 6 when attaching the attachment frame 3 with the new frame 2 attached thereto to the inner peripheral side of the existing frame 6. In the present embodiment, as shown in FIG. 13, on the outer peripheral side of the attachment lower frame 32, from the indoor side X2 to the outdoor side X1, from the space below the lower part of the outer peripheral side plane 322a to the space in front of the outdoor side vertically extending plate portion 323, and from the space in front of the outdoor side vertically extending plate portion 323 to the space facing downward, an L-shaped space S2 is formed as indicated by a virtual line (two-dot chain line). The L-shaped space S2 is formed along the indoor side X2 surface of the outdoor side vertically extending plate portion 323 and the outer peripheral side plane 322a on the outer peripheral side of the attachment lower frame 32.

[0046] As a result, since the existing lower frame 62 can be accommodated in the L-shaped space S2, the attachment frame 3 with the new frame 2 attached can be easily attached to the existing frame 6. In particular, in the present embodiment, as shown in FIG. 10, since the outer peripheral side plane 322a is formed along the indoor-outdoor direction of the attachment lower frame 32, the attachment lower frame 32 with the new lower frame 22 attached can be attached to the existing lower frame 62 so as not to interfere with attachment corresponding to existing frames 6 of various shapes. When attaching the attachment frame 3 with the new frame 2 attached to the existing frame 6, it is attached in a tilted state such that the lower end side is positioned closer to the existing frame 6 side than the upper end side. Therefore, after the existing lower frame 62 enters the L-shaped space S2, the entire attachment frame 3 is attached to the existing frame 6. Therefore, by accommodating the L-shaped space S2 in the existing lower frame 62, the attachment frame 3 with the new frame 2 attached can be easily attached to the existing frame 6.

[0047] As shown in FIG. 10, the indoor side horizontal extension plate 324 extends horizontally in the indoor side X2 direction from the end of the indoor side X2 at the upper end of the attachment lower frame hollow portion 322. The indoor side plane 324a on the outer peripheral side of the attachment frame 3 in the indoor side horizontal extension plate 324 is formed on the same plane as the outer peripheral side plane 322a of the attachment lower frame 32. The indoor side plane 324a is formed in a planar shape over the entire longitudinal direction of the attachment lower frame 32.

[0048] When the attachment frame 3 is fixed to the building 100 (frame), the screws 36 are arranged to penetrate the indoor side horizontal extension plate 324. As a result, the indoor side horizontal extension plate 324 is fixed to the building 100 (frame) by the screws 36. When a gap is formed between the indoor side plane 324a of the indoor side horizontal extension plate 324 and the frame member 101, a spacer member is arranged. The spacer member is composed of a plurality of sheets, and the thickness of the sheet for filling the gap is set according to the size of the gap between the indoor side plane 324a of the indoor side horizontal extension plate 324 and the frame member 101. In the present embodiment, since no gap is formed between the indoor side plane 324a of the indoor side horizontal extension plate 324 and the frame member 101, the spacer member is not arranged.

[0049] The indoor-side upper extension part 325 extends upward from the upper end of the end of the indoor side X2 of the attachment lower frame hollow part 322.

[0050] The L-shaped hook piece 326 projects upward in an L-shape from the outdoor side X1 part of the upper surface of the indoor-outdoor direction extending part 321. When attaching the attachment lower frame 32 to the new installation lower frame 22, the L-shaped hook piece 326 is hooked on the L-shaped hook piece 224 of the new installation lower frame 22 as shown in FIG. 13. Note that, as a structure for fixing the attachment lower frame 32 to the new installation lower frame 22, instead of a hooking structure, a structure fastened by screw fixing or the like may be used.

[0051] The attachment vertical frame 33 is arranged in a so-called vertical-over structure in which the longitudinal ends of the attachment vertical frame 33 are arranged outside the longitudinal ends of the attachment upper frame 31 and the attachment lower frame 32. As shown in FIG. 11, the attachment vertical frame 33 has an attachment vertical frame hollow part 331 (hollow part) in which an outer peripheral side plane 331a is formed, an outdoor-side left-right direction extending plate part 332 (search direction extending plate part), an indoor-side indoor direction extension part 333 (extension plate), an indoor-side side extension part 334, an indoor-side side end protruding piece 335, and a protruding hook piece 336.

[0052] The attachment vertical frame hollow part 331 is formed in an elongated rectangular hollow shape extending in the indoor-outdoor direction. An outer peripheral side plane 331a is formed on the outer surfaces in the left-right direction of the attachment vertical frame hollow part 331. The outer peripheral side plane 331a is formed on the outer peripheral side of the attachment frame 3 in the attachment vertical frame 33. The outer peripheral side plane 331a faces the existing vertical frame 63 and is formed in a planar shape extending in the indoor-outdoor direction and the up-down direction. The outer peripheral side plane 331a is formed over the entire longitudinal direction of the attachment vertical frame 33 and faces the outside in the left-right direction.

[0053] The outer peripheral side plane 331a is formed in a planar shape so as not to contact the inner peripheral side of the existing frame 6 when attaching the attachment frame 3 with the new frame 2 attached thereto to the inner peripheral side of the existing frame 6. In the present embodiment, as shown in FIGS. 14 and 15, the outer peripheral side of the attachment vertical frame 33 forms an L-shaped space S3, as indicated by a virtual line (two-dot chain line), by the space on the outer side in the left-right direction of the outer peripheral side plane 331a and the space on the inner side of the outdoor-side left-right extending plate portion 332 from the indoor side X2 toward the outdoor side X1. The L-shaped space S3 is formed along the surface on the indoor side X2 of the outdoor-side left-right extending plate portion 332 and the outer peripheral side plane 331a on the outer peripheral side of the attachment vertical frame 33.

[0054] As a result, the existing vertical frame 63 can be accommodated in the L-shaped space S3, so that the attachment frame 3 with the new frame 2 attached thereto can be easily attached to the existing frame 6. In particular, in the present embodiment, as shown in FIG. 11, since the outer peripheral side plane 331a is formed along the indoor-outdoor direction of the attachment vertical frame 33, the attachment vertical frame 33 with the new vertical frame 23 attached thereto can be attached to the existing vertical frame 63 so as not to interfere during attachment, corresponding to existing frames 6 of various shapes.

[0055] The indoor-side indoor-direction extending portion 333 extends from the end on the inner side X2 of the attachment vertical frame hollow portion 331 in the left-right direction to the indoor side X2 at the end on the outer side in the left-right direction. The indoor-side plane 333a on the outer peripheral side of the attachment frame 3 in the indoor-side indoor-direction extending portion 333 is formed on the same plane as the outer peripheral side plane 331a of the attachment vertical frame hollow portion 331. The indoor-side plane 333a is formed in a planar shape over the entire longitudinal direction of the attachment vertical frame 33.

[0056] When the indoor-side indoor-direction extension part 333 is fixed to the building 100 (the frame), the screw 36 is arranged to penetrate it. Thus, the indoor-side indoor-direction extension part 333 is fixed to the building 100 (the frame) by the screw 36. When a gap is formed between the indoor-side plane 333a of the indoor-side indoor-direction extension part 333 and the frame member 101, the spacer member 37 is arranged. The spacer member 37 is composed of a plurality of sheets, and the thickness of the sheet for filling the gap is set according to the size of the gap between the indoor-side plane 333a of the indoor-side indoor-direction extension part 333 and the frame member 101.

[0057] On the outdoor-side X1 surface of the attachment vertical frame hollow part 331, a pair of engaging protrusions 331b are formed and arranged at a distance from each other left and right. The pair of engaging protrusions 55 of the outdoor-side decorative cover 53 are engaged and attached to the pair of engaging protrusions 331b.

[0058] The outdoor-side left-and-right extending plate part 332 is formed in a plate shape extending outward in the left-and-right direction from the outdoor-side X1 end of the attachment vertical frame hollow part 331. The outdoor-side left-and-right extending plate part 332 is arranged on the outdoor-side X1 and extends in the left-and-right direction (the finding direction).

[0059] The indoor-side side extension part 334 extends inward in the left-and-right direction from the indoor-side X2 end of the attachment vertical frame hollow part 331. The indoor-side side end protruding piece 335 protrudes toward the indoor-side X2 from the inner end in the left-and-right direction of the indoor-side side extension part 334.

[0060] The protruding hook piece 336 protrudes toward the outdoor-side X1 from the inner end in the left-and-right direction of the outdoor-side X1 of the attachment vertical frame hollow part 331. When the attachment vertical frame 33 is attached to the new vertical frame 23, as shown in FIGS. 14 and 15, it is hooked on the L-shaped hook piece 234 of the new vertical frame 23. Note that the structure for fixing the attachment vertical frame 33 to the new vertical frame 23 may be a structure fastened by screw fixing or the like instead of a hooking structure.

[0061] As shown in FIG. 18, in the attachment vertical frame 33, a notch 337 is formed at the upper end of the plate portion 331c on the inner side in the left - right direction of the attachment vertical frame hollow portion 331. The notch 337 is formed by being notched in a U - shaped manner that opens upward. The notch 337 is formed at the upper end of the attachment vertical frame 33 at the portion where the attachment upper frame 31 and the attachment vertical frame 33 are abutted, and communicates the horizontal gutter structure portion 310 of the attachment upper frame 31 with the attachment vertical frame hollow portion 331 inside the attachment vertical frame 33.

[0062] At the portion where the attachment upper frame 31 and the attachment vertical frame 33 are abutted, a packing member 35 (water - stop member) is disposed between the attachment upper frame 31 and the attachment vertical frame 33. The packing member 35 is disposed between the longitudinal end of the attachment upper frame 31 and the longitudinal end of the attachment vertical frame 33.

[0063] In the packing member 35, a notch 351 having the same shape as the notch 337 of the attachment vertical frame 33 is formed at the portion where the notch 337 of the attachment vertical frame 33 is formed. The packing member 35 ensures the water - stop performance between the attachment upper frame 31 and the attachment vertical frame 33.

[0064] By configuring the attachment upper frame 31 and the attachment vertical frame 33 in this way, the water that has entered the horizontal gutter structure portion 310 of the attachment upper frame 31 is guided to both ends in the longitudinal direction of the attachment upper frame 31 by the horizontal gutter structure portion 310. Then, the water guided to both ends in the longitudinal direction of the attachment upper frame 31 flows into the attachment vertical frame hollow portion 331 through the notch 337 of the attachment vertical frame 33 and is guided downward. Therefore, since the water can flow along the horizontal gutter structure portion 310 formed in the attachment upper frame 31, the drainage performance can be improved.

[0065] Here, as shown in FIG. 10, the existing lower frame 62 is disposed below the attachment vertical frame 33. The existing lower frame 62 receives the water flowing into the interior of the attachment vertical frame 33 at the lower side of the attachment vertical frame 33 and discharges it to the outside. Specifically, the water guided downward toward the attachment vertical frame 33 is received by the existing lower frame 62, guided to the lower stage portion of the step portion of the existing lower frame 62, and discharged to the outside through a drainage portion (not shown) formed at the longitudinal end side of the lower stage portion of the existing lower frame 62.

[0066] As shown in FIGS. 10 and 11, the indoor side decorative members 41, 42, and 43 are respectively attached to the resin angle members 213, 223, and 233 of the new frame 2. The boundary between the indoor side decorative members 41, 42, and 43 and the inner peripheral surface of the frame member 101 is shielded by a parting material 45 having an L-shaped cross section fixed to the frame member 101.

[0067] The indoor side decorative members 41, 42, and 43 have a cover body 46 and a cover attachment portion 47. For the indoor side decorative members 41, 42, and 43, the cover attachment portions 47 are respectively attached to the resin angle members 213, 223, and 233 of the new frame 2. The cover attachment portion 47 attached to the new upper frame 21 and the new vertical frame 23 has an attachment engagement plate 471.

[0068] As shown in FIG. 10, the cover attachment portion 47 attached to the new upper frame 21 is sandwiched and fitted between the prospective direction extension piece 213a (temporary fixing portion, one-side holding portion) of the resin angle member 213 and the indoor side lower end horizontal protruding piece 316 (temporary fixing portion, the other-side holding portion) of the attachment upper frame 31, held in a temporarily fixed state, and fixed by a screw 48. The prospective direction extension piece 213a of the resin angle member 213 and the indoor side lower end horizontal protruding piece 316 of the attachment upper frame 31 constitute a temporary fixing portion that can be fitted and temporarily fixed to the indoor side decorative member 41.

[0069] The prospective direction extension piece 213a of the resin angle member 213 and the indoor-side lower-end horizontal protruding piece 316 of the attachment upper frame 31 are arranged to face each other so that the attachment engagement plate 471 of the cover attachment portion 47 can be fitted and held. The attachment engagement plate 471 of the cover attachment portion 47 is sandwiched, fitted, and held between the prospective direction extension piece 213a of the resin angle member 213 and the indoor-side lower-end horizontal protruding piece 316 of the attachment upper frame 31.

[0070] As shown in FIG. 10, the cover attachment portion 47 attached to the newly installed lower frame 22 is fixed to the lower part of the prospective direction extension piece 213a of the resin angle member 213 by screws 48.

[0071] As shown in FIG. 11, the cover attachment portion 47 attached to the newly installed vertical frame 23 is sandwiched and fitted between the prospective direction extension piece 233a (temporary fixing portion, one-side holding portion) of the resin angle member 233 and the indoor-side side-end protruding piece 335 (temporary fixing portion, one-side holding portion) of the attachment vertical frame 33, held, and temporarily fixed, and then fixed by screws 48. The prospective direction extension piece 233a of the resin angle member 233 and the indoor-side side-end protruding piece 335 of the attachment vertical frame 33 constitute a temporary fixing portion that can be fitted and temporarily fixed to the indoor-side decorative member 41.

[0072] The prospective direction extension piece 233a of the resin angle member 233 and the indoor-side side-end protruding piece 335 of the attachment vertical frame 33 are arranged to face each other so that the attachment engagement plate 471 of the cover attachment portion 47 can be fitted and held. The attachment engagement plate 471 of the cover attachment portion 47 is sandwiched, fitted, and held between the prospective direction extension piece 233a of the resin angle member 233 and the indoor-side side-end protruding piece 335 of the attachment vertical frame 33.

[0073] The attachment engaging plate 471 of the cover attachment portion 47 attached to the newly installed upper frame 21 can be temporarily fixed between the projected direction extension piece 213a of the resin angle member 213 and the indoor side lower end horizontal projection piece 316 of the attachment upper frame 31. The attachment engaging plate 471 is formed to have a length that is disposed and temporarily fixed between the projected direction extension piece 213a of the resin angle member 213 and the indoor side lower end horizontal projection piece 316 of the attachment upper frame 31. An engaging protrusion 471a is formed at one end of the attachment engaging plate 471. The engaging protrusion 471a protrudes toward the indoor side lower end horizontal projection piece 316 side of the attachment upper frame 31.

[0074] Accordingly, in the cover attachment portion 47 attached to the newly installed upper frame 21, when the attachment engaging plate 471 is disposed between the projected direction extension piece 213a of the resin angle member 213 and the indoor side lower end horizontal projection piece 316 of the attachment upper frame 31, the engaging protrusion 471a is engaged, so that the cover attachment portion 47 is fitted, and when attaching the indoor side decorative member 41, the hand can be released from the indoor side decorative member 41 to temporarily fix it. After being temporarily fixed, the indoor side decorative member 41 is fixed by screws 48 from the lower side.

[0075] The attachment engaging plate 471 of the cover attachment portion 47 attached to the newly installed lower frame 22 can be temporarily fixed between the projected direction extension piece 233a of the resin angle member 233 and the indoor side side end projection piece 335 of the attachment vertical frame 33. The attachment engaging plate 471 is formed to have a length that is disposed and temporarily fixed between the projected direction extension piece 233a of the resin angle member 233 and the indoor side side end projection piece 335 of the attachment vertical frame 33. An engaging protrusion 471a is formed at one end of the attachment engaging plate 471. The engaging protrusion 471a protrudes toward the indoor side side end projection piece 335 side of the attachment vertical frame 33.

[0076] As a result, in the cover attachment portion 47 attached to the newly installed lower frame 22, similar to the attachment upper frame 31, when the attachment engaging plate 471 is disposed between the projected direction extension piece 233a of the resin angle member 233 and the indoor side lateral end protruding piece 335 of the attachment vertical frame 33, the cover attachment portion 47 can be fitted by engaging the engaging protrusion 471a, and when attaching the indoor side decorative member 41, the hand can be released from the indoor side decorative member 43 and temporarily fixed. After being temporarily fixed, the indoor side decorative member 42 is fixed by screws 48.

[0077] As shown in FIGS. 10 and 11, the outdoor side decorative covers 51, 52, 53 are respectively attached to the attachment upper frame 31, the attachment lower frame 32, and the attachment vertical frame 33. The outdoor side decorative covers 51, 52, 53 each have a projected direction extending plate 54 having a surface facing the outdoor side X1, and a pair of engaging protrusions 55 formed on the back side of the projected direction extending plate 54.

[0078] The projected direction extending plates 54 of the outdoor side decorative covers 51, 52, 53 are each formed in a plate shape extending along the attachment upper frame 31, the attachment lower frame 32, and the attachment vertical frame 33 respectively.

[0079] The outdoor side decorative covers 51, 52, 53 are each attached to the attachment upper frame 31, the attachment lower frame 32, and the attachment vertical frame 33 respectively by engaging a pair of engaging protrusions 55 with a pair of engaging protrusions 313a, 323a, 333b of the attachment upper frame 31, the attachment lower frame 32, and the attachment vertical frame 33.

[0080] Further, as shown in FIGS. 10 and 11, the retrofit fitting 1 has an airtight structure 70. The airtight structure 70 is configured to connect the existing frame 6 side and the newly installed frame 2 side with airtight tapes (the existing frame side airtight tape 71, the connecting airtight tape 72) to connect the existing frame 6 and the attachment frame 3 attached to the newly installed frame 2. The airtight structure 70 is arranged to connect the existing frame 6 and the attachment frame 3 attached to the newly installed frame 2 in order to improve the airtight performance between the existing frame 6 and the newly installed frame 2.

[0081] As shown in FIGS. 10 and 11, the airtight structure 70 includes an existing frame side airtight tape 71 (existing frame side airtight attachment sheet material) at least partially attached to the existing frame 6, and a connecting airtight tape 72 (connecting airtight attachment sheet material) that connects the existing frame side airtight tape 71 and the attachment frame 3. As the existing frame side airtight tape 71 and the connecting airtight tape 72, for example, an airtight waterproof tape having an acrylic adhesive provided on one side can be used.

[0082] The existing frame side airtight tape 71 is attached across the existing frame 6 (existing upper frame 61, existing lower frame 62, existing vertical frame 63) and the building 100 (body). By attaching the existing frame side airtight tape 71 across the existing frame 6 (existing upper frame 61, existing lower frame 62, existing vertical frame 63) and the building 100 (body), the unevenness and rough parts on the surface of the frame member 101 are flattened to form a base for attaching the connecting airtight tape 72.

[0083] The connecting airtight tape 72 is bent in a stepped shape, with one end attached to the attachment frame 3 (attachment upper frame 31, attachment lower frame 32, attachment vertical frame 33) and the other end overlapping and attached to the existing frame side airtight tape 71.

[0084] The existing frame side airtight tape 71 is formed to extend across the entire longitudinal direction of each of the existing upper frame 61, existing lower frame 62, and existing vertical frame 63. The connecting airtight tape 72 is formed to extend across the entire longitudinal direction of each of the attachment upper frame 31, attachment lower frame 32, and attachment vertical frame 33.

[0085] As described above, by having the airtight structure 70 configured to connect the existing frame 6 side and the new frame 2 side with airtight tapes (the existing frame side airtight tape 71 and the connecting airtight tape 72), the existing frame side airtight tape 71 attached to the existing frame 6 and the building 100 (the building structure), and the connecting airtight tape 72 attached to the attachment frame 3 (the attachment upper frame 31, the attachment lower frame 32, and the attachment vertical frame 33) overlap, and an airtight line can be secured at the portion where a part of the existing frame side airtight tape 71 and a part of the connecting airtight tape 72 overlap doubly, so that the airtight performance can be ensured.

[0086] The procedure for installing the refitted fitting 1 will be described. When installing the refitted fitting 1, first, the attachment frame 3 is assembled on the outer periphery of the newly installed frame 2 incorporated on all four sides.

[0087] First, as shown in FIG. 9, in order to attach the attachment frame to the newly installed frame 2, the attachment upper frame 31, the attachment lower frame 32, and the attachment vertical frame 33 are respectively hooked and arranged on the newly installed upper frame 21, the newly installed lower frame 22, and the left and right newly installed vertical frames 23.

[0088] Specifically, as shown in FIG. 9, the attachment upper frame 31, the attachment lower frame 32, and the pair of attachment vertical frames 33 are assembled on the outer periphery of the newly installed frame 2 configured by assembling all four sides (attachment frame assembly step).

[0089] As the order of assembling the attachment upper frame 31, the attachment lower frame 32, and the pair of attachment vertical frames 33, first, the attachment upper frame 31 is attached to the newly installed upper frame 21, and the attachment lower frame 32 is attached to the newly installed lower frame 22. Then, with the attachment upper frame 31 attached to the newly installed upper frame 21 and the attachment lower frame 32 attached to the newly installed lower frame 22, the pair of attachment vertical frames 33 are attached to the newly installed vertical frames 23.

[0090] Specifically, in order to attach the attachment upper frame 31 to the newly installed upper frame 21, as shown in Fig. 12, in the part closer to the outdoor side X1 in the indoor-outdoor direction, the L-shaped hook piece 317 of the attachment upper frame 31 is hooked on the protruding hook piece 214 of the newly installed upper frame 21, and on the indoor side X2 relative to the part where the L-shaped hook piece 317 of the attachment upper frame 31 is hooked on the hook piece 214 of the newly installed upper frame 21, the attachment upper frame 31 is arranged and attached to the outer surface of the newly installed upper frame 21. Thereby, the attachment upper frame 31 is attached in a state of being hooked on the newly installed upper frame 21.

[0091] Also, in order to attach the attachment lower frame 32 to the newly installed lower frame 22, as shown in Fig. 13, in the part closer to the outdoor side X1 in the indoor-outdoor direction, the L-shaped hook piece 224 of the attachment lower frame 32 is hooked on the L-shaped hook piece 326 of the newly installed lower frame 22, and on the indoor side X2 relative to the part where the L-shaped hook piece 224 of the attachment lower frame 32 is hooked on the L-shaped hook piece 326 of the newly installed lower frame 22, the attachment lower frame 32 is arranged and attached to the outer surface of the newly installed lower frame 22. Thereby, the attachment lower frame 32 is attached in a state of being hooked on the newly installed lower frame 22.

[0092] After that, as shown in Figs. 16 and 17, with the attachment upper frame 31 attached to the newly installed upper frame 21 and the attachment lower frame 32 attached to the newly installed lower frame 22, as shown in Figs. 14 and 15, the attachment vertical frame 33 is attached to the newly installed vertical frame 23. In this case, as shown in Figs. 14 and 15, in the part closer to the outdoor side X1 in the indoor-outdoor direction, the protruding hook piece 336 of the attachment vertical frame 33 is hooked on the L-shaped hook piece 234 of the newly installed vertical frame 23, and on the indoor side X2 relative to the part where the protruding hook piece 336 of the attachment vertical frame 33 is hooked on the L-shaped hook piece 234 of the newly installed vertical frame 23, the attachment vertical frame 33 is arranged and attached to the outer surface of the newly installed vertical frame 23. Thereby, the attachment vertical frame 33 is attached in a state of being hooked on the newly installed vertical frame 23.

[0093] Next, as shown in FIGS. 16 and 17, the longitudinal ends of the attachment upper frame 31 and the attachment vertical frame 33 are fixed to each other by screws 34, and the longitudinal ends of the attachment lower frame 32 and the attachment vertical frame 33 are fixed to each other by screws 34 (attachment frame fastening step).

[0094] Here, as shown in FIGS. 16 and 17, the upper and lower ends of the attachment vertical frame 33 having a so-called vertical-lap structure are fixed to the end faces of the longitudinal ends of the attachment upper frame 31 by screws 34 from the outer sides in the lateral direction. Thereby, in each of the left and right attachment vertical frames 33, the upper end of the attachment vertical frame 33 is fixed to the end face of the longitudinal end of the attachment upper frame 31 by a screw 34, and the lower end of the attachment vertical frame 33 is fixed to the end face of the longitudinal end of the attachment lower frame 32 by a screw 34. In this way, the attachment frame 3 assembled in the four circumferences is attached to the four circumferences of the outer periphery of the new frame 2.

[0095] As described above, the attachment frame 3 is attached in a state of being hooked on the new frame 2, and the longitudinal ends of the attachment upper frame 31 and the attachment vertical frame 33 are fixed to each other by screws 34, and the longitudinal ends of the attachment lower frame 32 and the attachment vertical frame 33 are fixed to each other by screws 34, whereby the attachment frame 3 can be firmly attached to the outside of the new frame 2. Further, since the attachment frame 3 is assembled and attached to the outside of the four circumferences of the new frame 2, the water stop performance can be improved.

[0096] In the present embodiment, the longitudinal ends of the attachment upper frame 31 and the attachment vertical frame 33 and the longitudinal ends of the attachment lower frame 32 and the attachment vertical frame 33 are fixed to each other by screws 34, but the present invention is not limited thereto. When the sizes of the attachment upper frame 31, the attachment lower frame 32, and the attachment vertical frame 33 are large, screw fixation may be performed not at the longitudinal ends of the attachment upper frame 31 and the attachment vertical frame 33 but at positions inside the longitudinal ends.

[0097] Subsequently, as shown in FIG. 10, the newly installed upper frame 21 and the attachment upper frame 31 are fixed by a plurality of screws 38 arranged along the longitudinal direction. Also, the newly installed lower frame 22 and the attachment lower frame 32 are fixed by a plurality of screws 38 arranged along the longitudinal direction. Further, as shown in FIG. 11, the newly installed vertical frame 23 and the attachment vertical frame 33 are fixed by a plurality of screws 38 arranged along the longitudinal direction. Thereby, the attachment frame 3 can be firmly fixed to the newly installed frame 2. Note that the number of screws 38 arranged along the longitudinal direction varies depending on the sizes of the newly installed frame 2 and the attachment frame 3. For example, when the sizes of the newly installed frame 2 and the attachment frame 3 are large, it is necessary to increase the number of screws from the viewpoint of fixing strength.

[0098] Next, the newly installed frame 2 with the attachment frame 3 assembled is inserted into the inside of the existing frame 6 from the indoor side X2 of the existing frame 6. Here, if the newly installed frame 2 with the attachment frame 3 assembled is inserted into the inside of the existing frame 6 while standing vertically from the indoor side X2 of the existing frame 6, the outdoor-side vertically extending plate portions 313 and 323 and the indoor-side inwardly extending portion 333 of the attachment frame 3 will hit the existing frame 6. Therefore, from the indoor side X2 of the existing frame 6, while tilting the newly installed frame 2 with the attachment frame 3 obliquely, it is inserted into the inside of the existing frame 6, taken out once to the outdoor side X1 of the existing frame 6, and then the newly installed frame 2 with the attachment frame 3 is pulled towards the existing frame 6 from the outdoor side X1 of the existing frame 6. Thereby, the outdoor-side vertically extending plate portions 313 and 323 and the indoor-side inwardly extending portion 333 of the attachment frame 3 are arranged close to the surface of the outdoor side X1 of the existing frame 6, and the attachment frame 3 is attached to the existing frame 6 and fixed in this state.

[0099] Subsequently, as shown in FIG. 19, the indoor-side horizontally extending plates 314 and 324 and the indoor-side inwardly extending portion 333 of the attachment frame 3 are temporarily fixed to the building 100 (frame) with screws 36.

[0100] Then, as shown in FIG. 20, a plurality of spacer members 37 are arranged between the indoor-side horizontally extending plates 314, the indoor-side horizontally extending plates 324, the indoor-side inwardly extending portions 333 and the frame member 101.

[0101] As shown in FIG. 21, the plurality of spacer members 37 are arranged at a plurality of positions spaced apart in the longitudinal direction of the attachment upper frame 31 and the attachment vertical frame 33. The spacer member 37 is composed of a plurality of sheets, and the number of sheets is set according to the size of the gap between the indoor-side horizontally extending plates 314, the indoor-side horizontally extending plates 324, the indoor-side inwardly extending portions 333 and the frame member 101.

[0102] As shown in FIG. 20, the spacer member 37 has a U-shaped groove 371, and is inserted and arranged so that the U-shaped groove is arranged along the shaft portion of the screw 36. When attaching the attachment frame 3 to the existing frame 6, the spacer member 37 is arranged along the indoor-side planes 314a, 324a, 333a formed on the same plane as the outer peripheral side planes 312a, 322a, 331a as shown in FIGS. 10 and 11. Thereby, the spacer member 37 can be arranged in a stable state between the indoor-side planes 314a, 324a, 333a and the frame member 101. In this state, the screw 36 is fixedly installed. As an example of the spacer member 37, a thin plate-like member formed of a resin material or the like can be cited.

[0103] Here, as shown in FIGS. 10 and 11, the refitted fitting 1 of the present embodiment has an airtight structure 70 configured to connect the existing frame 6 side and the new frame 2 side by airtight tapes (the existing-frame-side airtight tape 71 and the connecting airtight tape 72). The airtight structure 70 has two airtight tapes (the existing-frame-side airtight tape 71 and the connecting airtight tape 72), and by connecting the existing frame 6 and the attachment frame 3 attached to the new frame 2 with the two airtight tapes (the existing-frame-side airtight tape 71 and the connecting airtight tape 72), the airtight performance can be improved.

[0104] Specifically, in the airtight structure 70, the existing frame side airtight tape 71 is attached so as to straddle the existing frame 6 (existing upper frame 61, existing lower frame 62, existing vertical frame 63) and the building 100 (body), and the connecting airtight tape 72 is attached so as to straddle the existing frame side airtight tape 71, the attachment frame 3 (attachment upper frame 31, attachment lower frame 32, attachment vertical frame 33), and the spacer member 37.

[0105] The existing frame side airtight tape 71 has the role of ensuring the airtight performance and watertight performance between the existing vertical frame 63 and the building 100 (body) and preventing moisture from being transmitted to the building 100 (body) side. Further, the connecting airtight tape 72 ensures the airtight performance and watertight performance among the attachment frame 3 (attachment upper frame 31, attachment lower frame 32, attachment vertical frame 33), the spacer member 37, and the building 100 (body). Then, by overlapping the existing frame side airtight tape 71 attached to the existing frame 6 and the building 100 (body) and the connecting airtight tape 72 attached to the attachment frame 3 (attachment upper frame 31, attachment lower frame 32, attachment vertical frame 33), the airtight performance and watertight performance can be improved.

[0106] Next, as shown in FIG. 7, on the indoor side X2 surface of the attachment frame 3, the indoor side decorative member 41 is attached with the length of the tip side of the cover body 46 of the indoor side decorative member 41 adjusted.

[0107] As shown in FIGS. 10 and 22, in the indoor side decorative member 41 attached to the new upper frame 21, as shown in FIGS. 10 and 11, the attachment engaging plate 471 of the cover attachment portion 47 of the indoor side decorative member 41 is disposed between the projected piece 213a extending in the expected direction of the resin angle member 213 and the indoor side lower end horizontal projecting piece 316 of the attachment upper frame 31, thereby engaging the engaging projection 471a. Thereby, the attachment engaging plate 471 of the cover attachment portion 47 is fitted and held, and the indoor side decorative member 41 is temporarily fixed.

[0108] In this temporarily fixed state, when the hand is released from the indoor decorative member 41, the indoor decorative member 41 can be temporarily held and temporarily fixed between the projected direction extension piece 213a of the resin angle member 213 and the indoor side lower end horizontal protruding piece 316 of the attachment upper frame 31. In this state, the screw 48 is moved from the lower side to the upper side to fix the indoor decorative member 41 with the screw 48. As a result, since the operator can release the hand from the indoor decorative member 41, the workability of attaching the indoor decorative member 41 can be further improved.

[0109] As shown in FIG. 10, in the indoor decorative member 41 attached to the newly installed lower frame 22, with the cover attachment portion 47 of the indoor decorative member 41 disposed below the projected direction extension piece 223a of the resin angle member 223, the screw 48 is moved from the upper side to the lower side to fix it with the screw 48.

[0110] As shown in FIG. 11, in the indoor decorative member 41 attached to the newly installed vertical frame 23, by disposing the attachment engaging plate 471 of the cover attachment portion 47 of the indoor decorative member 41 between the projected direction extension piece 233a of the resin angle member 233 and the indoor side lateral end protruding piece 335 of the attachment vertical frame 33, the engaging protrusion 471a is engaged. Thereby, the attachment engaging plate 471 of the cover attachment portion 47 can be fitted and held, and the indoor decorative member 43 can be temporarily fixed.

[0111] In this temporarily fixed state, when the hand is released from the indoor decorative member 43, the indoor decorative member 43 can be temporarily held and temporarily fixed between the projected direction extension piece 233a of the resin angle member 233 and the indoor side lateral end protruding piece 335 of the attachment vertical frame 33. In this state, the screw 48 is moved from the inner side to the outer side in the left - right direction to fix the indoor decorative member 43 with the screw 48. As a result, since the operator can release the hand from the indoor decorative member 41, the attachment work can be facilitated.

[0112] Next, as shown in FIG. 5, outdoor decorative covers 51, 52, and 53 with the length of the tip side adjusted are attached to the surface of the outdoor side X1 of the attachment frame 3. Thereby, the unevenness of the attachment frame 3 is covered by the outdoor decorative covers 51, 52, and 53, so that the planar surfaces of the outdoor decorative covers 51, 52, and 53 on the outdoor side X1 are exposed to the outdoor side X1, and thus the design property can be improved. In addition, the outdoor decorative covers 51, 52, and 53 can be stably attached to the attachment frame 3 assembled in a four-sided configuration.

[0113] According to the present embodiment, the following effects are achieved. The construction method of the retrofit fitting 1 of the present embodiment includes an attachment frame assembly step of assembling an attachment upper frame 31, an attachment lower frame 32, and a pair of attachment vertical frames 33 on the outer periphery of a new frame 2 configured by assembling four sides, and after the attachment frame assembly step, an attachment frame fastening step of fixing the attachment upper frame 31 and the attachment vertical frames 33 with screws 34 and fixing the attachment lower frame 32 and the attachment vertical frames 33 with screws 34. Thereby, the attachment frame 3 can be firmly attached to the outer periphery of the new frame 2.

[0114] Further, in the present embodiment, in the attachment frame assembly step, the attachment upper frame 31 is attached in a state of being hooked on the new upper frame 21, the attachment lower frame 32 is attached in a state of being hooked on the new lower frame 22, and the attachment vertical frames 33 are attached in a state of being hooked on the new vertical frames 23. Thereby, the attachment frame 3 can be more firmly attached to the outer periphery of the new frame 2.

[0115] Also, in this embodiment, in the attachment frame assembly step, after attaching the attachment upper frame 31 to the newly installed upper frame 21 and attaching the attachment lower frame 32 to the newly installed lower frame 22, the attachment vertical frame 33 is attached to the newly installed vertical frame 23. In the attachment frame fastening step, with screws 34, the upper and lower end portions of each of the pair of attachment vertical frames 33 are fixed to both longitudinal ends of the attachment upper frame 31, respectively, and with screws 34, the upper and lower end portions of each of the pair of attachment vertical frames 33 are fixed to both longitudinal ends of the attachment lower frame 32, respectively. Thereby, the attachment frame 3 can be more firmly attached to the outer periphery of the newly installed frame 2.

[0116] As described above, a preferred embodiment of the present disclosure has been described. However, the present disclosure is not limited to the above-described embodiment and can be appropriately modified.

[0117] For example, as shown in the modified form shown in FIG. 24, for example, an optional member 11 may be configured to be attached to the indoor side X2 of the newly installed lower frame 22A or the attachment lower frame 32A. Thereby, by attaching the optional member 11 to the indoor side X2 of the newly installed lower frame 22A or the attachment lower frame 32A, various members can be attached to the optional member 11. As in the modified form shown in FIG. 24, for example, when applying the retrofit fitting of this embodiment to a bathroom retrofit fitting, a base material 12 for installing a picture frame for a bathroom or the like can also be arranged above the optional member 11.

[0118] Further, for example, the width of the attachment frame 3 (attachment upper frame 31, attachment lower frame 32, attachment vertical frame 33) in the finding direction may be formed to be larger than the width in the finding direction of the above embodiment. For example, when the retrofit fitting of this embodiment is applied to the opening of the entrance / exit of a conventional bathroom where tiles are provided to form a unit bathroom, in order to ensure the strength of the wall of the unit bathroom, the size of the opening of the unit bathroom may be made smaller compared to the opening of the conventional bathroom. In such a case, by using an attachment frame 3 (attachment upper frame 31, attachment lower frame 32, attachment vertical frame 33) whose width in the finding direction is formed to be larger than the width in the finding direction of the above embodiment, a retrofit fitting with a smaller opening size of the unit bathroom can be provided.

[0119] In the above embodiment, the case where the retrofit fitting 1 is applied to a sliding window type retrofit sash has been described, but the present invention is not limited to this. The retrofit fitting may be applied to, for example, an opening / closing type retrofit fitting in which a door body rotates around a rotation axis to open and close, or a vertically sliding type retrofit fitting. Further, the retrofit fitting may be applied to, for example, a FIX type retrofit fitting that is fixedly attached to a frame without opening and closing.

[0120] In the above embodiment, in the airtight structure 70, an airtight tape (existing frame side airtight tape 71, connecting airtight tape 72) is used, but the present invention is not limited to this. In the airtight structure 70, for example, a sheet material (airtight sticking sheet) provided with an adhesive at the sticking portion may be used.

Description of Reference Numerals

[0121] 1 Retrofit fitting, 2 Newly installed frame, 3 Attachment frame, 6 Existing frame, 21 Newly installed upper frame, 22 Newly installed lower frame, 23 Newly installed vertical frame, 31 Attachment upper frame, 32 Attachment lower frame, 33 Attachment vertical frame, 34 Screw (fastening member), 100 Building

Claims

1. A construction method for a retrofit fitting attached to an existing frame provided at an opening of a building, The retrofit fitting includes a newly installed frame configured by assembling four sides, and an attachment frame attached to the inner peripheral side of the existing frame in a state where the four sides are assembled and attached to the outer periphery of the newly installed frame, The newly installed frame has a newly installed upper frame, a newly installed lower frame, and a pair of newly installed vertical frames, The attachment frame has an attachment upper frame, an attachment lower frame, and a pair of attachment vertical frames, An attachment frame assembly step of assembling the attachment upper frame, the attachment lower frame, and the pair of attachment vertical frames to the outer periphery of the newly installed frame configured by assembling four sides; After the attachment frame assembly step, an attachment frame fastening step of fixing the attachment upper frame and the attachment vertical frames with a fastening member, and fixing the attachment lower frame and the attachment vertical frames with a fastening member; After the attachment frame fastening step, a newly installed frame placement step of placing the newly installed frame with the attachment frame assembled inside the existing frame; After the newly installed frame placement step, a temporary fixing step of temporarily fixing the attachment upper frame, the attachment vertical frames, and the attachment lower frame to the building body with screws; After the temporary fixing step, a spacer member placement step of placing a spacer member having a U-shaped groove between any of the attachment upper frame and the building body, between the attachment vertical frames and the building body, and between the attachment lower frame and the building body so that the U-shaped groove is arranged along the shaft portion of the screw; After the spacer member placement step, a permanent fixing step of permanently fixing the attachment upper frame, the attachment vertical frames, and the attachment lower frame to the building body with the screws. A construction method for a retrofit fitting comprising these steps.

2. Before the step of arranging the new frame, a step of attaching an existing frame side airtight tape so as to straddle the existing frame and the building body, after the step of arranging the spacer member, a step of attaching a connecting airtight tape so as to straddle the existing frame side airtight tape, the spacer member, and the attachment frame. The method for constructing a refitted fitting according to claim 1, comprising:

3. In the step of assembling the attachment frame, the attachment upper frame is attached in a state of being hooked on the new upper frame, the attachment lower frame is attached in a state of being hooked on the new lower frame, and the attachment vertical frame is attached in a state of being hooked on the new vertical frame. The method for constructing a refitted fitting according to claim 1 or 2.

4. In the step of assembling the attachment frame, after attaching the attachment upper frame to the new upper frame and attaching the attachment lower frame to the new lower frame, the attachment vertical frame is attached to the new vertical frame. In the step of fastening the attachment frame, with the fastening member, the upper end portions of each of the pair of attachment vertical frames are fixed to both end portions in the longitudinal direction of the attachment upper frame, respectively, and with the fastening member, the lower end portions of each of the pair of attachment vertical frames are fixed to both end portions in the longitudinal direction of the attachment lower frame, respectively. The method for constructing a refitted fitting according to any one of claims 1 to 3.

Images