Renovated fittings and fixtures

Abstract

To provide a refurbishing fitting improved in heat insulation performance by employing a resin sliding screen.SOLUTION: A refurbishing fitting has: an existing frame attached to an opening in a building framework; a new frame attached over four sides of the inner circumference of the existing frame; and at least one resin sliding screen slidably fitted inside the new frame in a left-right direction. At least top and bottom frame members among top, bottom, left and right frame members forming the new frame are each formed by a frame member body containing a metal, and a rail member that covers the frame member body and guides the sliding movement of the sliding screen.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a modified building fixture.

Background Art

[0002] Conventionally, when remodeling an opening of a building, such as by renovation, a new frame has been attached to the inner peripheral side of an existing frame attached to the opening. For example, Patent Document 1 discloses a modified building fixture in which a new heat-insulating frame body is attached to the inner peripheral side of an existing frame.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] From the viewpoint of improving the heat insulation performance of a modified building fixture in which a shoji screen is slidably housed inside a new frame, it is required to be able to use a resin shoji screen as the shoji screen housed inside the new frame.

[0005] An object of the present disclosure is to provide a modified building fixture with improved heat insulation performance by using a resin shoji screen.

Means for Solving the Problems

[0006] The present disclosure includes an existing frame attached to an opening of a building body, a new frame attached across the four circumferences on the inner peripheral side of the existing frame, and at least one resin shoji screen slidably housed in the left-right direction inside the new frame. At least the upper and lower frame members among the upper, lower, left, and right frame members constituting the new frame are composed of a frame member main body containing metal and a rail member that covers the frame member main body and guides the sliding movement of the shoji screen. The present disclosure relates to a modified building fixture.

Brief Description of the Drawings

[0007]

Figure 1

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MODE FOR CARRYING OUT THE INVENTION

[0008] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The remodeling fitting 1 according to the present embodiment is a remodeling fitting for remodeling in which a new frame 3 is attached to an existing frame 2 in a state where the existing frame 2 is attached to an opening of a building body 100.

[0009] In this specification, the prospective direction is a direction along the indoor-outdoor direction in the remodeling fitting 1. The finding direction is a direction along the surface direction of the facing material in the remodeling fitting 1 and is a direction orthogonal to the prospective direction. In the drawings, the outdoor side of the remodeling fitting 1 is referred to as "outdoor side X1", and the indoor side of the remodeling fitting 1 is referred to as "indoor side X2". The horizontal direction when the remodeling fitting 1 is viewed from the front is referred to as "left and right". The direction toward the center of the remodeling fitting 1 when the remodeling fitting 1 is viewed from the front is referred to as "inward", and the direction away from the center of the remodeling fitting 1 is referred to as "outward".

[0010] The retrofit fitting 1 shown in the first embodiment is a sliding window type retrofit sash installed in the opening of a wooden building frame 100. The retrofit fitting 1 includes an existing frame 2, a new frame 3, two resin-made shoji 41 and 42, and one screen window 43. The existing frame 2 is attached across the upper, lower, left, and right four sides at the opening of the building frame 100. The new frame 3 is attached across the upper, lower, left, and right four sides on the inner peripheral side of the existing frame 2. The shoji 41 and 42 and the screen window 43 are slidably housed inside the new frame 3 in the left-right direction. As shown in FIG. 1, a crescent lock 44 is attached to the shoji 41 arranged on the indoor side X2. Drainage ports 329 for draining rainwater flowing into the lower frame portion are provided at both left and right end portions of the finding surface on the outdoor side X1 in the lower frame portion. In FIG. 1, the screen window 43 is not shown.

[0011] As shown in FIGS. 2 and 3, the existing frame 2 is formed by rectangularly assembling four frame members, namely an existing upper frame 21, an existing lower frame 22, and a pair of left and right existing vertical frames 23, and is attached inside the opening of the building frame 100 before retrofit. The existing upper frame 21, the existing lower frame 22, and the pair of left and right existing vertical frames 23 are each made of an extruded shape material made of metal such as aluminum or resin such as vinyl chloride. A molding member 101 is arranged on the indoor side of the existing frame 2. The molding member 101 is attached across the upper, lower, left, and right four sides on the inner peripheral surface of the opening of the building frame 100 and extends inward from the end surface 2a on the indoor side X2 of the existing frame 2. The gaps between the rectangularly assembled existing frame 2 and the outer wall material 102 provided on the outdoor side X1 of the building frame 100 are sealed around the four sides by a backup material 103 and a sealing material 104.

[0012] As shown in FIGS. 2 and 4, the existing upper frame 21 is arranged at the upper part of the opening of the building frame 100 and is fixed at a position offset to the outdoor side X1 in the opening. The existing upper frame 21 has a pair of guide rails 211a and 211b for the existing shoji protruding downward, respectively, and a guide rail 211c for the existing screen window.

[0013] As shown in FIGS. 2 and 5, the existing lower frame 22 is disposed at the lower part of the opening of the building body 100 and fixed at a position offset toward the outdoor side X1 in the opening. The existing lower frame 22 has a pair of guide rails 221a and 221b for existing shoji that protrude upward, and a guide rail 221c for an existing screen door. The height of the existing lower frame 22 is formed to gradually decrease from the guide rail 221a on the innermost indoor side X2 to the guide rail 221c on the outermost outdoor side X1.

[0014] As shown in FIGS. 3, 6, and 7, the existing vertical frames 23 are disposed on the left and right vertical portions of the opening of the building body 100 and fixed at a position offset toward the outdoor side X1 in the opening.

[0015] The new frame 3 of the present embodiment is a dedicated frame specifically formed for the existing frame 2 so as to correspond to the shape of the existing frame 2. As shown in FIGS. 2 and 3, the new frame 3 is attached to the inner peripheral side extending from the existing frame 2 to the frame member 101 in a state where four frame members, namely, a new upper frame 31, a new lower frame 32, and a pair of left and right new vertical frames 33, are assembled in a rectangular shape. Specifically, the new frame 3 is arranged on the inner peripheral side of the existing frame 2 and the frame member 101 after being extended from the indoor side X2 to the outdoor side X1 of the opening of the building body 100 in a state where the four sides are assembled and then drawn back into the indoor side X2. The new frame 3 disposed on the inner peripheral side of the existing frame 2 and the frame member 101 is fixed to the building body 100 on the indoor side X2 of the existing frame 2 by fixing members, namely, screws SC1, SC2, and SC3.

[0016] Next, the configurations of the new upper frame 31, the new lower frame 32, and the pair of left and right new vertical frames 33 of the new frame 3 will be individually described.

[0017] First, the new upper frame 31 will be described.

[0018] The newly installed upper frame 31 extends in the left - right direction along the length direction of the existing upper frame 21. The newly installed upper frame 31 has a length in the prospective direction that spans from the guide rail 211c of the existing upper frame 21 to the vicinity of the central part in the prospective direction of the picture frame member 101. The newly installed upper frame 31 is composed of a frame member body 31A and a resin - made rail member 31B. The rail member 31B covers the lower side of the frame member body 31A, and the upper frame members 41B1, 42B1 of the shoji screens 41, 42 described later straddle the rail member 31B (outdoor - side guide rail part 3101, indoor - side guide rail part 3103) and are arranged so as to sandwich the rail member 31B (outdoor - side guide rail part 3101, indoor - side guide rail part 3103) from the indoor - outdoor direction, thereby guiding the sliding movement of the shoji screens 41, 42.

[0019] As shown in FIGS. 4 and 5, the frame member body 31A is divided into two parts in the prospective direction into an outdoor - side frame member 311 and an indoor - side frame member 312. Both the outdoor - side frame member 311 and the indoor - side frame member 312 are metal frame members, and each is made of an extruded profile extruded in the length direction from a metal material such as aluminum. The outdoor - side frame member 311 and the indoor - side frame member 312 are integrally connected by a connecting member 313. The connecting member 313 is made of a member having heat insulation properties such as resin, and blocks the heat transfer from the outdoor - side frame member 311 to the indoor - side frame member 312 in the frame member body 31A.

[0020] The frame member body 31A integrally has a pair of guide rails 314a, 314b corresponding to the two shoji screens 41, 42 housed inside the newly installed frame 3, and a guide rail 314c for the screen door 43 housed in the outermost outdoor - side X1 of the newly installed frame 3. The guide rail 314b and the guide rail 314c are arranged on the outdoor - side frame member 311 and protrude downward. The guide rail 314a is arranged adjacent to the connecting member 313 in the indoor - side frame member 312 and protrudes downward. The guide rails 314a, 314b, and 314c extend over the entire length in the length direction of the frame member body 31A.

[0021] The outdoor frame member 311 has a hollow portion 3111 with a substantially rectangular cross-section that extends from the portion where the guide rail 314b is disposed to the connecting member 313. The indoor frame member 312 has a hollow portion 3121 with a substantially rectangular cross-section that extends from the connecting member 313 toward the indoor side X2. The upper surface 311a of the outdoor frame member 311 corresponding to the hollow portion 3111 and the upper surface 312a of the indoor frame member 312 corresponding to the hollow portion 3121 are both flat surfaces, and are arranged flush in the prospective direction of the frame member body 31A. The connecting member 313 does not protrude above these upper surfaces 311a, 312a.

[0022] The outdoor frame member 311 integrally has an outdoor extension portion 3112 that extends toward the outdoor side X1 at a position lower than the upper surface 311a of the outdoor frame member 311. The outdoor extension portion 3112 is disposed at the end of the new upper frame 31 on the outdoor side X1. Specifically, the outdoor extension portion 3112 is disposed between the guide rail 314b and the guide rail 314c. The outdoor extension portion 3112 is also a drain groove that allows rainwater that has entered the new upper frame 31 to flow in the left-right direction without flowing into the indoor side X2.

[0023] An outdoor side wall portion 315 that extends upward in the finding direction is integrally provided at the most outdoor side X1 portion of the outdoor extension portion 3112. The outdoor side wall portion 315 protrudes further above the upper surfaces 311a, 312a of the outdoor frame member 311 and the indoor frame member 312, and is arranged to overlap the outdoor side surface 211d of the guide rail 211c at the most outdoor side X1 of the existing upper frame 21 from the outdoor side X1. A decorative material 316 made of a metal material such as aluminum is detachably attached to the outdoor side wall portion 315 from the outdoor side X1. The decorative material 316 covers the outdoor side wall portion 315, extends above the existing upper frame 21 in the finding direction, and forms the finding surface of the new upper frame 31. The decorative material 316 covers the finding surface of the existing upper frame 21 on the outdoor side X1 and the sealing material 104 exposed between the existing upper frame 21 and the outer wall material 102 from the outdoor side X1.

[0024] On the outdoor-side X1 part of the upper surface 311a of the outdoor-side frame member 311, an elastic fin member 317 is provided. The fin member 317 protrudes upward from the upper surface 311a of the outdoor-side frame member 311 so as to be close to the guide rail 211b of the existing upper frame 21. In the new upper frame 31, even if rainwater infiltrates between the outdoor-side wall part 315 and the guide rail 211c of the existing upper frame 21, it flows in the left-right direction through the outdoor-side extension part 3112 and is drained to the outer peripheral side of the new vertical frame 33, suppressing infiltration into the indoor-side X2. Even if a large amount of rainwater infiltrates into the outdoor-side extension part 3112, the fin member 317 prevents infiltration into the indoor-side X2. Since the fin member 317 has elasticity, when the new upper frame 31 is arranged on the inner peripheral side of the existing upper frame 21, even if it comes into contact with the existing upper frame 21 or the like, it can elastically bend without the risk of damage.

[0025] At the innermost indoor-side X2 part of the frame member main body 31A, a mounting part 318 for fixing the new upper frame 31 to the building body 100 is integrally provided. The mounting part 318 is arranged parallel to the upper surfaces 311a and 312a of the outdoor-side frame member 311 and the indoor-side frame member 312, and extends in a plate shape toward the indoor-side X2 from above the end face 312b on the indoor-side X2 of the indoor-side frame member 312.

[0026] On the upper surface 318a of the mounting part 318, at least a pair of ridge parts 3181 extending in the length direction of the new upper frame 31 are provided. The pair of ridge parts 3181 protrude slightly upward from the upper surface 318a of the mounting part 318 and are arranged in parallel with a predetermined interval in the prospective direction. The position of the upper surface 318a of the mounting part 318 is arranged slightly lower than the positions of the upper surfaces 311a and 312a of the outdoor-side frame member 311 and the indoor-side frame member 312. The pair of ridge parts 3181 protrude from the upper surface 318a of the mounting part 318 to a height substantially equal to the positions of the upper surfaces 311a and 312a of the outdoor-side frame member 311 and the indoor-side frame member 312.

[0027] The rail member 31B is attached to the frame member main body 31A over the entire length in the longitudinal direction of the frame member main body 31A so as to cover the lower surface of the frame member main body 31A, specifically, from the lower surface 311b of the outdoor side frame member 311 to the lower surface 312c of the indoor side frame member 312. The rail member 31B of the present embodiment is divided into two resin-made rail members 31B1 and 31B2 corresponding to the pair of guide rails 314a and 314b of the frame member main body 31A, respectively.

[0028] As shown in FIG. 5, the rail member 31B1 arranged on the outdoor side X1 is attached to the lower surface 311b of the outdoor side frame member 311 of the frame member main body 31A. The rail member 31B1 has an outdoor side guide rail portion 3101 and an outdoor side cover portion 3102 that extends integrally from the outdoor side guide rail portion 3101 toward the indoor side X2.

[0029] The outdoor side guide rail portion 3101 has a rail width that is sufficiently larger than that of the guide rail 314b in the prospective direction and protrudes below the guide rail 314b. Specifically, the outdoor side guide rail portion 3101 has an outdoor side rail wall portion 3101a, an indoor side rail wall portion 3101b, and an end wall portion 3101c that connects the lower end portions of the outdoor side rail wall portion 3101a and the indoor side rail wall portion 3101b in the prospective direction. The length of the outdoor side rail wall portion 3101a in the finding direction is shorter than the length of the indoor side rail wall portion 3101b in the finding direction.

[0030] The outdoor side rail wall portion 3101a is arranged in parallel with the guide rail 314b and protrudes further downward from the lower end of the guide rail 314b. An outdoor side engaging portion 3101d formed in a hook shape toward the outdoor side X1 is provided at the upper end portion of the outdoor side rail wall portion 3101a. The outdoor side engaging portion 3101d engages with an engaging convex portion 314b2 provided at the lower end portion of the guide rail 314b so as to protrude toward the indoor side X2 from the indoor side X2. The outdoor side rail wall portion 3101a is arranged flush with the side surface of the guide rail 314b on the outdoor side X1 side so as to extend the guide rail 314b downward.

[0031] The indoor rail wall portion 3101b is arranged slightly apart from the guide rail 314b on the indoor side X2 and parallel to the guide rail 314b and the outdoor rail wall portion 3101a. At the upper end of the indoor rail wall portion 3101b, an overhanging portion 3101e protruding toward the outdoor side X1 is integrally provided. The overhanging portion 3101e is arranged parallel to the lower surface 311b of the outdoor frame member 311 and is in contact with or close to the lower surface 311b. The tip of the overhanging portion 3101e on the outdoor side X1 is fitted into an engagement groove 314b1 provided on the indoor side X2 at the base of the guide rail 314b from the indoor side X2. The lower end of the indoor rail wall portion 3101b is arranged at the same position as the lower end of the outdoor rail wall portion 3101a.

[0032] The end wall portion 3101c is arranged slightly above the positions of the lower ends of the outdoor rail wall portion 3101a and the indoor rail wall portion 3101b. As a result, a groove portion 3101f surrounded by the end wall portion 3101c, the lower end portions of the outdoor rail wall portion 3101a and the indoor rail wall portion 3101b is formed along the length direction of the outdoor guide rail portion 3101 on the lower surface side. The groove portion 3101f is blocked by fitting a sealing material 3101g made of resin, rubber, or the like.

[0033] The outdoor cover portion 3102 is formed in a hollow shape with a substantially rectangular cross-section and extends along the indoor side X2 from the upper end portion of the indoor rail wall portion 3101b to the guide rail 314a. The outdoor cover portion 3102 substantially shields the space between the indoor rail wall portion 3101b and the guide rail 314a. The outdoor cover portion 3102 is in contact with or close to the lower surface 311b of the outdoor frame member 311 and the lower surface of the connecting member 313 on the indoor side X2 of the guide rail 314b. An indoor engagement portion 3102a protruding toward the indoor side X2 is provided at the upper part of the end surface on the indoor side X2 of the outdoor cover portion 3102. The indoor engagement portion 3102a engages with an engagement groove 314a1 provided on the outdoor side X1 at the base of the guide rail 314a from the outdoor side X1. The outdoor cover portion 3102 suppresses the transmission of the outside air temperature transmitted from the existing upper frame 21 side to the new upper frame 31 to the inner peripheral side between the guide rails 314a and 314b of the new upper frame 31.

[0034] The rail member 31B2 disposed on the indoor side X2 is attached to the lower surface 312c of the indoor side frame member 312 of the frame member body 31A. The rail member 31B2 has an indoor side guide rail portion 3103 and an indoor side cover portion 3104 that extends integrally from the indoor side guide rail portion 3103 toward the indoor side X2. The indoor side guide rail portion 3103 protrudes downward from the frame member body 31A at the same protruding height as the outdoor side guide rail portion 3101.

[0035] The indoor side guide rail portion 3103 has the same rail width in the expected direction as the outdoor side guide rail portion 3101 and protrudes downward from the guide rail 314a at the same protruding height as the outdoor side guide rail portion 3101. Specifically, the indoor side guide rail portion 3103 has an outdoor side rail wall portion 3103a, an indoor side rail wall portion 3103b, and an end wall portion 3103c that connects the lower end portions of the outdoor side rail wall portion 3103a and the indoor side rail wall portion 3103b in the expected direction. The length of the outdoor side rail wall portion 3103a in the finding direction is shorter than the length of the indoor side rail wall portion 3103b in the finding direction.

[0036] The outdoor side rail wall portion 3103a is arranged parallel to the guide rail 314a and protrudes further downward from the lower end of the guide rail 314a. An outdoor side engaging portion 3103d formed in a hook shape toward the outdoor side X1 is provided at the upper end of the outdoor side rail wall portion 3103a. The outdoor side engaging portion 3103d engages with the engaging convex portion 314a2 provided to protrude toward the indoor side X2 at the lower end portion of the guide rail 314a from the indoor side X2. The outdoor side rail wall portion 3103a is arranged flush with the side surface of the guide rail 314a on the outdoor side X1 side so as to extend the guide rail 314a downward.

[0037] The indoor rail wall portion 3103b is disposed slightly away from the guide rail 314a on the indoor side X2 and parallel to the guide rail 314a and the outdoor rail wall portion 3103a. At the upper end of the indoor rail wall portion 3103b, an overhanging portion 3103e protruding toward the outdoor side X1 is integrally provided. The overhanging portion 3103e is disposed parallel to the lower surface 312c of the indoor frame member 312 and is in contact with or close to the lower surface 312c. The tip of the overhanging portion 3103e on the outdoor side X1 is fitted into an engaging groove 314a1 provided on the indoor side X2 at the base of the guide rail 314a from the indoor side X2. The lower end of the indoor rail wall portion 3103b is disposed at the same position as the lower end of the outdoor rail wall portion 3103a.

[0038] The end wall portion 3103c is disposed slightly above the positions of the lower ends of the outdoor rail wall portion 3103a and the indoor rail wall portion 3103b. Thereby, a groove portion 3103f similar to the groove portion 3101f of the outdoor guide rail portion 3101 is formed along the length direction of the indoor guide rail portion 3103 on the lower surface side of the end wall portion 3103c. The groove portion 3103f is blocked by fitting a sealing material 3103g made of resin or rubber or the like.

[0039] The indoor cover portion 3104 extends from near the upper end portion of the indoor rail wall portion 3103b toward the indoor side X2. The indoor cover portion 3104 substantially shields the lower surface 312c of the indoor frame member 312 on the indoor side X2 from the indoor rail wall portion 3103b at a distance below the lower surface 312c of the indoor frame member 312. At the end of the indoor cover portion 3104 on the indoor side X2, an indoor engaging portion 3104a formed in a hook shape toward the indoor side X2 is provided. The indoor engaging portion 3104a engages with the lower end portion of a protruding piece 312d extending downward from the end surface 312b on the indoor side X2 of the indoor frame member 312 from the outdoor side X1. The indoor cover portion 3104 suppresses the transmission of the outside air temperature transmitted from the existing upper frame 21 side to the new upper frame 31 to the inner peripheral side on the indoor side X2 of the guide rail 314a of the new upper frame 31. At the end of the indoor cover portion 3104 on the indoor side X2, an angle member 319 described later is integrally provided.

[0040] In the newly installed upper frame 31 of the newly installed frame 3 in a state of being square - assembled in a rectangle, it is arranged on the inner - peripheral side of the part extending from the existing upper frame 21 to the frame member 101. The outdoor - side frame member 311 of the newly installed upper frame 31 is arranged below the existing upper frame 21. The indoor - side frame member 312 of the newly installed upper frame 31 is arranged below the frame member 101. As shown in FIG. 4, when a gap is formed between the newly installed upper frame 31 and the frame member 101, the spacer member 301 is arranged to fill the gap. The spacer member 301 is composed of one or more sheets. The thickness of the sheet constituting the spacer member 301 and the number of sheet laminations are appropriately set according to the size of the gap between the indoor - side frame member 312 of the newly installed upper frame 31 and the frame member 101, etc. The upper surface 312a, the attachment part 318, and the connecting member 313 of the indoor - side frame member 312 are in contact with and overlap the spacer member 301. The newly installed upper frame 31 is fixed to the building body 100 on the indoor side X2 of the existing upper frame 21 by a screw SC1 that penetrates the attachment part 318 and the spacer member 301 from the indoor side X2. The screw SC1 penetrates between the pair of ridge parts 3181 of the attachment part 318. The pair of ridge parts 3181 are in contact with the spacer member 301 and suppress the deformation of the attachment part 318 when the fastening torque of the screw SC1 acts.

[0041] In a state where the newly installed frame 3 is attached to the inner - peripheral side of the existing frame 2, there is no member for attaching the newly installed upper frame 31 between the existing upper frame 21 and the newly installed upper frame 31. The newly installed upper frame 31 is arranged so as to directly face the inner - peripheral surface of the existing upper frame 21 vertically. Therefore, the newly installed upper frame 31 can be arranged as close as possible to the existing upper frame 21. Since the newly installed upper frame 31 is not fixed to the existing upper frame 21, even if distortion or the like occurs in the existing upper frame 21, it can be attached without being affected by the distorted state. Since the screw SC1 does not contact the existing upper frame 21, heat is not transmitted between the existing upper frame 21 and the indoor - side frame member 312 of the newly installed upper frame 31 through the screw SC1.

[0042] An angle member 319 made of resin is attached to the indoor side frame member 312 of the newly installed upper frame 31. As shown in FIG. 5, the angle member 319 has an angle part 319a extending toward the indoor side X2 and a standing wall part 319b extending upward from the end of the angle part 319a on the outdoor side X1. The standing wall part 319b is integrally connected to the end of the indoor side cover part 3104 on the indoor side X2, and is arranged so as to be continuous with the end face 312b and the protruding piece 312d on the indoor side X2 of the indoor side frame member 312 and extend the end face 312b and the protruding piece 312d downward. The angle part 319a extends from the lower end part of the standing wall part 319b toward the indoor side X2 and covers the mounting part 318 from below. The angle part 319a is arranged at a position substantially equal to the position of the lower ends of the outdoor side guide rail part 3101 and the indoor side guide rail part 3103. The angle member 319 may be provided separately from the indoor side cover part 3104 at a part corresponding to the protruding piece 312d.

[0043] Next, the newly installed lower frame 32 will be described.

[0044] The newly installed lower frame 32 extends in the left - right direction along the length direction of the existing lower frame 22. The newly installed lower frame 32 has a prospective length extending from the guide rail 211c of the existing lower frame 22 to the vicinity of the central part in the prospective direction of the frame member 101. The newly installed lower frame 32 is composed of a frame member main body 32A and a resin - made rail member 32B. The rail member 32B covers the upper side of the frame member main body 32A, and the lower frame members 41B2, 42B2 of the shoji 41, 42 to be described later straddle the rail member 32B (outdoor side guide rail part 3201, indoor side guide rail part 3203) and sandwich the rail member 32B (outdoor side guide rail part 3201, indoor side guide rail part 3203) from the indoor - outdoor direction, thereby guiding the sliding movement of the shoji 41, 42.

[0045] The frame member body 32A is divided into two parts in the prospective direction into an outdoor side frame member 321 and an indoor side frame member 322. Both the outdoor side frame member 321 and the indoor side frame member 322 are metal frame members, each consisting of an extruded profile extruded in the length direction from a metal material such as aluminum. The outdoor side frame member 321 and the indoor side frame member 322 are integrally connected by a connecting member 323. The connecting member 323 is made of a heat-insulating member such as resin, and blocks the heat transfer from the outdoor side frame member 321 to the indoor side frame member 322 in the newly installed lower frame 32.

[0046] The frame member body 32A has guide rails 324a, 324b, 324c that protrude upward corresponding to the guide rails 314a, 314b, 314c of the newly installed upper frame 31, respectively. The guide rail 324a on the innermost indoor side X2 is arranged adjacent to the connecting member 323 on the outermost outdoor side X1 on the upper surface 322a of the indoor side frame member 322. The guide rail 324b is arranged near the center in the prospective direction on the upper surface 321a of the outdoor side frame member 321. The guide rail 324c is arranged on the outermost outdoor side X1 on the upper surface 321a of the outdoor side frame member 321.

[0047] As shown in FIGS. 6 and 7, the outdoor side frame member 321 has a hollow portion 3211 with a shape that bulges downward along the shape of the existing lower frame 22. The indoor side frame member 322 has a hollow portion 3221 with a substantially rectangular cross-section that extends from the connecting member 323 toward the indoor side X2. A stepped portion 3222 with a shape that is recessed upward is formed at the outdoor side X1 portion on the lower surface 322c of the indoor side frame member 322.

[0048] At the outdoor side X1 of the newly installed lower frame 32, as shown in Fig. 6, a height adjustment member 325 is attached. The height adjustment member 325 extends downward from the newly installed lower frame 32 and is placed on the upper surface 22a between the guide rails 221b and 221c of the existing lower frame 22. By adjusting the height adjustment member 325, the height of the outdoor side X1 of the newly installed lower frame 32 is adjusted. On the side surface of the outdoor side X1 of the newly installed lower frame 32, a decorative member 326 made of a metal material such as aluminum is detachably attached from the outdoor side X1. The decorative member 326 covers the height adjustment member 325, extends downward in the finding direction from the existing lower frame 22, and forms the finding surface of the newly installed lower frame 32. The decorative member 326 covers the finding surface of the outdoor side X1 of the existing lower frame 22 and the sealing material 104 exposed between the existing lower frame 22 and the outer wall member 102 from the outdoor side X1.

[0049] At the innermost indoor side X2 of the newly installed lower frame 32, a mounting portion 327 for fixing the newly installed lower frame 32 to the building body 100 is integrally provided. The mounting portion 327 extends in a plate shape from the lower part of the end surface 322b of the indoor side X2 of the indoor side frame member 322 toward the indoor side X2.

[0050] On the lower surface 327a of the mounting portion 327, at least a pair of protruding strips 3271 extending in the length direction of the newly installed lower frame 32 are provided. The pair of protruding strips 3271 protrude slightly downward from the lower surface 327a of the mounting portion 327 and are arranged in parallel with a predetermined interval in the prospective direction.

[0051] The rail member 32B is attached to the frame member body 32A over the entire length in the length direction of the frame member body 32A so as to cover the upper surface of the frame member body 32A, specifically, the upper surface 321a of the outdoor side frame member 321 to the upper surface 322a of the indoor side frame member 322. The rail member 32B of the present embodiment is divided into two resin-made rail members 32B1 and 32B2 corresponding to the pair of guide rails 324a and 324b of the frame member body 32A respectively.

[0052] As shown in FIG. 7, the rail member 32B1 disposed on the outdoor side X1 is attached to the upper surface 321a of the outdoor side frame member 321 of the frame member main body 32A. The rail member 32B1 has an outdoor side guide rail portion 3201 and an outdoor side cover portion 3202 that extends integrally from the outdoor side guide rail portion 3201 toward the indoor side X2.

[0053] The outdoor side guide rail portion 3201 has a rail width that is sufficiently larger in the prospective direction than the guide rail 324b and protrudes above the guide rail 324b. Specifically, the outdoor side guide rail portion 3201 has an outdoor side rail wall portion 3201a, an indoor side rail wall portion 3201b, an upper end wall portion 3201c that connects the upper end portions of the outdoor side rail wall portion 3201a and the indoor side rail wall portion 3201b in the prospective direction, and a lower end wall portion 3201d that connects the lower ends of the outdoor side rail wall portion 3201a and the indoor side rail wall portion 3201b in the prospective direction, and is formed in a vertically long hollow shape with a substantially rectangular cross section.

[0054] The outdoor side rail wall portion 3201a is disposed parallel to the guide rail 324b, abuts against the guide rail 324b from the indoor side X2, and the lower end wall portion 3201d abuts against the upper surface 321a of the outdoor side frame member 321 and is placed thereon. On the outdoor side X1 side surface of the outdoor side rail wall portion 3201a, there is provided an outdoor side engaging portion 3201e that engages with the engaging convex portion 324b1 provided so as to protrude toward the indoor side X2 at the upper end portion of the guide rail 324b from the indoor side X2 and accommodates the entire guide rail 324b from the indoor side X2. The portion of the outdoor side rail wall portion 3201a that protrudes above the guide rail 324b is arranged flush with the outdoor side X1 side surface of the guide rail 314b so as to extend the guide rail 314b upward.

[0055] The upper end wall portion 3201c is disposed slightly below the positions of the upper ends of the outdoor side rail wall portion 3201a and the indoor side rail wall portion 3201b. As a result, a groove portion 3201f surrounded by the upper end wall portion 3201c, the upper end portions of the outdoor side rail wall portion 3201a and the indoor side rail wall portion 3201b is formed along the length direction of the outdoor side guide rail portion 3201 on the upper surface side of the upper end wall portion 3201c. A guide rail component 3201g made of a metal material such as aluminum is fitted and attached to the groove portion 3201f.

[0056] The outdoor side cover portion 3202 extends from near the lower end portion of the indoor side rail wall portion 3201b toward the indoor side X2 across the guide rail 324a. The outdoor side cover portion 3202 substantially shields the outdoor side frame member 321 and the connecting member 323 on the indoor side X2 of the indoor side rail wall portion 3201b at a distance above the upper surface 321a of the outdoor side frame member 321. An indoor side engaging portion 3202b formed in a hook shape toward the indoor side X2 protrudes from the lower surface 3202a of the outdoor side cover portion 3202. The indoor side engaging portion 3202b engages with the engaging groove 321c formed at the end portion of the upper surface 321a of the outdoor side frame member 321 on the indoor side X2 from the outdoor side X1. The outdoor side cover portion 3202 suppresses the transmission of the outside air temperature transmitted from the existing lower frame 22 side to the new lower frame 32 to the inner peripheral side on the indoor side X2 of the guide rail 324b of the new lower frame 32.

[0057] As shown in FIG. 6, a resin-made cover 3205 between rails is attached to the upper surface of the outdoor cover portion 3202. The cover 3205 between rails is arranged across the outdoor guide rail portion 3201 and the indoor guide rail portion 3203 so as to further shield the outdoor cover portion 3202. Specifically, as shown in FIG. 7, the edge portion on the outdoor side X1 of the cover 3205 between rails engages with an engaging protrusion 3201b1 protruding toward the indoor side X2 on the indoor rail wall portion 3201b of the outdoor guide rail portion 3201, and the edge portion on the indoor side X2 of the cover 3205 between rails engages with an engaging protrusion 324a2 protruding toward the outdoor side X1 on the guide rail 324a on the indoor side X2, thereby being attached. The cover 3205 between rails further suppresses the transmission of the outside air temperature transmitted from the existing lower frame 22 side to the new lower frame 32 to the inner peripheral side between the outdoor guide rail portion 3201 and the indoor guide rail portion 3203 of the new lower frame 32, and improves the heat insulation performance of the new lower frame 32.

[0058] The rail member 32B2 arranged on the indoor side X2 is attached to the upper surface 322a of the indoor frame member 322 of the frame member main body 32A. The rail member 32B2 has an indoor guide rail portion 3203 and an indoor cover portion 3204 integrally extending from the indoor guide rail portion 3203 toward the indoor side X2. The indoor guide rail portion 3203 protrudes upward from the frame member main body 31A at the same protruding height as the outdoor guide rail portion 3201.

[0059] The indoor guide rail portion 3203 has the same rail width in the expected direction as the outdoor guide rail portion 3201. Specifically, the indoor guide rail portion 3203 has an outdoor rail wall portion 3203a, an indoor rail wall portion 3203b, an upper end wall portion 3203c connecting the upper end portions of the outdoor rail wall portion 3203a and the indoor rail wall portion 3203b in the expected direction, and a lower end wall portion 3203d connecting the lower ends of the outdoor rail wall portion 3203a and the indoor rail wall portion 3203b in the expected direction, and is formed in a vertically long hollow shape with a substantially rectangular cross section.

[0060] The outdoor rail wall portion 3203a is arranged in parallel with the guide rail 324a, abuts against the guide rail 324a from the indoor side X2, and the lower end wall portion 3203d abuts against the upper surface 322a of the indoor side frame member 322 and is placed thereon. On the side surface of the outdoor rail wall portion 3203a on the outdoor side X1, there is provided an engaging groove 3203e that engages with the engaging convex portion 324a1 provided at the upper end portion of the guide rail 324a so as to protrude toward the indoor side X2 from the indoor side X2 and accommodates the entire guide rail 324a from the indoor side X2. The portion of the outdoor rail wall portion 3203a that protrudes above the guide rail 324a is arranged flush with the side surface of the guide rail 324a on the outdoor side X1 so as to extend the guide rail 314a upward.

[0061] The upper end wall portion 3203c is arranged slightly below the positions of the upper ends of the outdoor rail wall portion 3203a and the indoor rail wall portion 3203b. As a result, a groove portion 3203f surrounded by the upper end wall portion 3203c, the upper end portions of the outdoor rail wall portion 3203a and the indoor rail wall portion 3203b is formed along the length direction of the indoor guide rail portion 3203 on the upper end surface of the outdoor rail wall portion 3203a. A guide rail component 3203g made of a metal material such as aluminum is fitted and attached to the groove portion 3203f.

[0062] The indoor cover part 3204 extends from the lower end part of the indoor rail wall part 3203b toward the indoor side X2. The indoor cover part 3204 substantially shields the upper surface 322a of the indoor frame member 322 on the indoor side X2 from the indoor side rail wall part 3203b at a distance above the upper surface 322a of the indoor frame member 322. At the lower part of the end on the indoor side X2 of the indoor cover part 3204, an indoor engaging part 3204a is provided. The indoor engaging part 3204a engages with the engaging convex part 322d1 protruding toward the outdoor side X1 from the base of the protruding piece 322d extending upward from the end surface 322b on the indoor side X2 of the indoor frame member 322 from the outdoor side X1. The indoor cover part 3204 suppresses the transfer of the outside air temperature transmitted from the existing lower frame 22 side to the new lower frame 32 to the inner peripheral side on the indoor side X2 of the guide rail 314a of the new lower frame 32. At the end on the indoor side X2 of the indoor cover part 3204, an angle member 328 described later is integrally provided.

[0063] As shown in FIG. 6, a resin cover material 3206 is attached to the upper surface of the indoor cover part 3204. The cover material 3206 is arranged across the indoor guide rail part 3203 and the angle member 328 described later so as to further shield the indoor cover part 3204. Specifically, as shown in FIG. 7, the edge part on the outdoor side X1 of the cover material 3206 engages with the engaging protrusion 3203b1 protruding toward the indoor side X2 on the indoor rail wall part 3203b of the indoor guide rail part 3203, and the edge part on the indoor side X2 of the cover material 3206 engages with the engaging protrusion 328b1 protruding toward the outdoor side X1 on the vertical wall part 328b of the angle member 328, thereby being attached. The cover material 3206 further suppresses the transfer of the outside air temperature transmitted from the existing lower frame 22 side to the new lower frame 32 to the inner peripheral side on the indoor side X2 of the indoor guide rail part 3203 of the new lower frame 32, and improves the heat insulation performance of the new lower frame 32.

[0064] In the newly installed frame 3 in a state of being quadrangularly assembled in a rectangle, the newly installed lower frame 32 is disposed on the inner peripheral side of the portion extending from the existing lower frame 22 to the frame member 101. The outdoor side frame member 321 of the newly installed lower frame 32 is disposed above the existing lower frame 22. The indoor side frame member 322 of the newly installed lower frame 32 is disposed above the frame member 101. The newly installed lower frame 32 is fixed to the building body 100 on the indoor side X2 of the existing lower frame 22 by a screw SC2 passing through the mounting portion 327 from the indoor side X2. The screw SC2 passes through between a pair of ridge portions 3271 of the mounting portion 327. The pair of ridge portions 3271 are in contact with the frame member 101 and suppress the deformation of the mounting portion 327 when the fastening torque of the screw SC2 acts.

[0065] As shown in FIG. 6, inside the step portion 3222 of the indoor side frame member 322 of the newly installed lower frame 32, a spacer member 302 and a support plate 3021 are attached from below by screws 302a, filling the space between the spacer member 302 and the frame member 101. The spacer member 302 is composed of one or more sheets. The thickness of the sheet constituting the spacer member 302 and the number of laminated sheets are appropriately set according to the vertical depth of the step portion 3222, the size of the gap between the indoor side frame member 322 of the newly installed lower frame 32 and the frame member 101, and the like. The support plate 3021 is made of a plate material such as metal, fiber-reinforced resin such as CFRP, or PEEK resin, and extends from the indoor side frame member 322 through the lower part of the connecting member 323 to the outdoor side frame member 321. The end portion of the support plate 3021 on the outdoor side X1 abuts against the lower surface 321b of the portion adjacent to the connecting member 323 in the outdoor side frame member 321, and supports the outdoor side frame member 321 from below.

[0066] In a state where the new frame 3 is attached to the inner peripheral side of the existing frame 2, there is no member for attaching the new lower frame 32 between the existing lower frame 22 and the new lower frame 32. The new lower frame 32 is arranged so as to directly face the inner peripheral surface of the existing lower frame 22 vertically. Therefore, the new lower frame 32 can be arranged as close as possible to the existing lower frame 22. Since the new lower frame 32 is not fixed to the existing lower frame 22, even if the existing lower frame 22 is distorted or the like, it can be attached without being affected by the distorted state. Since the screw SC2 does not contact the existing lower frame 22, heat is not transmitted between the existing lower frame 22 and the indoor side frame member 322 of the new lower frame 32 through the screw SC2.

[0067] A resin angle member 328 is attached to the indoor side frame member 322 of the new lower frame 32. As shown in FIG. 7, the angle member 328 has an angle portion 328a extending toward the indoor side X2 and a vertical wall portion 328b extending downward from the end portion of the angle portion 328a on the outdoor side X1. The vertical wall portion 328b is integrally connected to the end portion of the indoor side cover portion 3204 on the indoor side X2, and is arranged so as to be continuous with the end face 322b and the protruding piece 322d on the indoor side X2 of the indoor side frame member 322 and extend the end face 322b and the protruding piece 322d upward. The angle portion 328a extends from the upper end portion of the vertical wall portion 328b toward the indoor side X2 and covers the attachment portion 327 from above. The angle portion 328a of the angle member 328 is arranged at a position substantially equal to the position of the upper ends of the outdoor side guide rail portion 3201 and the indoor side guide rail portion 3203. The angle member 328 may be provided separately from the indoor side cover portion 3204 at a portion corresponding to the protruding piece 322d.

[0068] Next, the new vertical frame 33 will be described. The left and right new vertical frames 33 have substantially the same structure except that they are symmetric about the left and right. Therefore, for the parts with the same structure common to the left and right new vertical frames 33, the same reference numerals will be used for common description.

[0069] The newly installed vertical frame 33 extends vertically along the length direction of the existing vertical frame 23. The newly installed vertical frame 33 has a length in the prospective direction that spans from the end of the existing vertical frame 23 on the outdoor side X1 to the vicinity of the central part in the prospective direction of the picture frame member 101. The newly installed vertical frame 33 is composed of a frame member main body 33A and a resin rail member 33B. The rail member 33B covers the inner side of the frame member main body 33A, and the vertical frame members 41B3 and 42B3 of the shoji screens 41 and 42 described later straddle the rail member 33B (outdoor side guide rail part 3301, indoor side guide rail part 3302) and are arranged so as to sandwich the rail member 33B (outdoor side guide rail part 3301, indoor side guide rail part 3302) from the indoor-outdoor direction, thereby guiding the sliding movement of the shoji screens 41 and 42.

[0070] The frame member main body 33A is divided into two parts in the prospective direction into an outdoor side frame member 331 and an indoor side frame member 332. Both the outdoor side frame member 331 and the indoor side frame member 332 are metal frame members, and each is made of an extruded profile extruded in the length direction from a metal material such as aluminum. The outdoor side frame member 331 and the indoor side frame member 332 are integrally connected by a connecting member 333. The connecting member 333 is made of a member having heat insulation properties such as resin, and blocks the heat transfer from the outdoor side frame member 331 to the indoor side frame member 332 in the newly installed vertical frame 33.

[0071] The position of the connecting member 333 in the prospective direction in the newly installed vertical frame 33 coincides with the position of the connecting members 313 and 323 in the newly installed upper frame 31 and the newly installed lower frame 32 in the prospective direction. The upper and lower end parts of the connecting member 333 are arranged in contact or close proximity to the left and right end parts of the connecting members 313 and 323 of the newly installed upper frame 31 and the newly installed lower frame 32. The connecting members 313, 323, and 333 are substantially continuous across the four sides of the newly installed frame 3.

[0072] As shown in FIGS. 8 to 11, the outdoor frame member 331 has a hollow portion 3311 with a substantially rectangular cross section. The indoor frame member 332 has a hollow portion 3321 with a substantially rectangular cross section. The outer surface 331a of the outdoor frame member 331 corresponding to the hollow portion 3311 and the outer surface 332a of the indoor frame member 332 corresponding to the hollow portion 3321 are both flat surfaces, and are arranged flush with each other in the expected direction of the new vertical frame 33. The connecting member 333 does not protrude outward beyond these outer surfaces 331a, 332a. The inner surface 331b of the outdoor frame member 331 corresponding to the hollow portion 3311 and the inner surface 332b of the indoor frame member 332 corresponding to the hollow portion 3321 are both flat surfaces, and are arranged flush with each other in the expected direction of the new vertical frame 33. The connecting member 333 does not protrude inward beyond these inner surfaces 331b, 332b.

[0073] An outdoor side wall portion 334 extending outward in the finding direction is integrally provided at the outermost outdoor side X1 portion of the outdoor frame member 331. The outdoor side wall portion 334 protrudes further outward in the finding direction than the outer surfaces 331a, 332a of the outdoor frame member 331 and the indoor frame member 332, and is arranged to overlap the outermost outdoor side X1 end face 23a of the existing vertical frame 23 from the outdoor side X1. A decorative material 335 made of a metal material such as aluminum is detachably attached to the outdoor side wall portion 334 from the outdoor side X1. The decorative material 335 covers the outdoor side wall portion 334, extends outward in the finding direction beyond the existing vertical frame 23, and forms the finding surface of the new vertical frame 33. The decorative material 335 covers the finding surface of the existing vertical frame 23 on the outdoor side X1 and the sealing material 104 exposed between the existing vertical frame 23 and the outer wall member 102 from the outdoor side X1.

[0074] An attachment portion 336 used to fix the new vertical frame 33 to the building body 100 is integrally provided at the innermost indoor side X2 portion of the new vertical frame 33. The attachment portion 336 extends plate-like from the indoor side X2 end face 332c of the indoor frame member 332 toward the indoor side X2. The attachment portion 336 is arranged parallel to the outer surfaces 331a, 332a of the outdoor frame member 331 and the indoor frame member 332.

[0075] On the outer surface 336a of the mounting portion 336, at least a pair of protruding strips 3361 extending in the length direction of the newly installed vertical frame 33 are provided. The pair of protruding strips 3361 protrude slightly outward from the outer surface 336a of the mounting portion 336 and are arranged in parallel with a predetermined interval in the prospective direction. The position of the outer surface 336a of the mounting portion 336 is arranged slightly inward from the positions of the outer surfaces 331a and 332a of the outdoor side frame member 331 and the indoor side frame member 332. The pair of protruding strips 3361 protrude from the outer surface 336a of the mounting portion 336 to a height substantially equal to the positions of the outer surfaces 331a and 332a of the outdoor side frame member 331 and the indoor side frame member 332.

[0076] On the outer surface 331a of the outdoor side frame member 331 of the newly installed vertical frame 33, at least one fin-shaped water shielding member 337 is provided respectively. The water shielding member 337 extends over the entire length in the length direction of the newly installed vertical frame 33. The water shielding member 337 protrudes from the outer surface 331a of the outdoor side frame member 331 toward the inner surface 23b of the existing vertical frame 23. The tip of the water shielding member 337 is in contact with the inner surface 23b of the existing vertical frame 23. Therefore, the water shielding member 337 is arranged so as to prevent rainwater from flowing in the indoor-outdoor direction between the existing vertical frame 23 and the newly installed vertical frame 33. The position of the water shielding member 337 in the prospective direction of the newly installed vertical frame 33 is arranged at a position slightly more indoor side X2 than the outdoor side extension portion 3112 of the newly installed upper frame 31, or at the same position as the fin member 317 of the newly installed upper frame 31. As a result, the rainwater flowing down between the existing vertical frame 23 and the newly installed vertical frame 33 from both ends in the length direction of the outdoor side extension portion 3112 of the newly installed upper frame 31 is efficiently drained onto the existing lower frame 22 along the surface of the outdoor side X1 of the water shielding member 337. Therefore, by providing this water shielding member 337 between the existing vertical frame 23 and the newly installed vertical frame 33, the intrusion of rainwater flowing down from the newly installed upper frame 31 into the indoor side X2 is suppressed. The rainwater flowing into the existing lower frame 22 is drained to the outdoor side X1 from notched portions (not shown) provided on both the left and right sides of the rail member 32B1 on the outermost outdoor side X1.

[0077] The water shielding member 337 is formed of an elastic member such as a soft resin or rubber. The water shielding member 337 may be formed of a hard member such as a hard resin or metal. When the water shielding member 337 is made of an elastic member, the tip of the water shielding member 337 elastically abuts against the inner surface 23b of the existing vertical frame 23, sealing the space between the existing vertical frame 23 and the new vertical frame 33. Therefore, the effect of suppressing the intrusion of rainwater into the indoor side X2 is high. The water shielding member 337 made of an elastic member can elastically bend even when the new vertical frame 33 comes into contact with the existing vertical frame 23 or the like when the new vertical frame 33 is disposed on the inner peripheral side of the existing vertical frame 23, and there is no risk of damage.

[0078] The rail member 33B is attached to the frame member body 33A over the entire length in the longitudinal direction of the frame member body 33A so as to cover the inner surface of the frame member body 33A, specifically, from the inner surface 331b of the outdoor frame member 331 to the inner surface 332b of the indoor frame member 332.

[0079] As shown in FIGS. 9 and 11, the rail member 33B covers substantially the entire area in the prospective direction of the frame member body 33A from the inner surface 331b of the outdoor frame member 331 to the inner surface 332b of the indoor frame member 332 of the frame member body 33A. The rail member 33B has an outdoor guide rail portion 3301, an indoor guide rail portion 3302, and a cover portion 3303 that integrally connects these guide rail portions 3301 and 3302 in the prospective direction.

[0080] The outdoor guide rail portion 3301 and the indoor guide rail portion 3302 are arranged at the same position in the prospective direction as the outdoor guide rail portions 3101 and 3201 and the indoor guide rail portions 3103 and 3203 provided on the new upper frame 31 and the new lower frame 32, respectively, and have the same rail width in the prospective direction as the outdoor guide rail portions 3101 and 3201 and the indoor guide rail portions 3103 and 3203.

[0081] The outdoor guide rail portion 3301 has an outdoor rail wall portion 3301a, an indoor rail wall portion 3301b, and an inner end wall portion 3301c that connects the inner ends of the outdoor rail wall portion 3301a and the indoor rail wall portion 3301b in the prospective direction. The outdoor guide rail portion 3301 is formed in a horizontally long hollow shape with a substantially rectangular cross-section that protrudes inward from the inner side surface 3303b of the cover portion 3303. The inner end wall portion 3301c is disposed slightly outward from the positions of the inner ends of the outdoor rail wall portion 3301a and the indoor rail wall portion 3301b. As a result, a groove portion 3301d surrounded by the inner end wall portion 3301c, the inner ends of the outdoor rail wall portion 3301a and the indoor rail wall portion 3301b is formed along the length direction of the outdoor guide rail portion 3301 on the inner surface side of the inner end wall portion 3301c.

[0082] The indoor guide rail portion 3302 has an outdoor rail wall portion 3302a, an indoor rail wall portion 3302b, and an inner end wall portion 3302c that connects the inner ends of the outdoor rail wall portion 3302a and the indoor rail wall portion 3302b in the prospective direction. The indoor guide rail portion 3302 is formed in a horizontally long hollow shape with a substantially rectangular cross-section that protrudes inward from the inner side surface 3303b of the cover portion 3303 in parallel with the outdoor guide rail portion 3301. The inner end wall portion 3302c is disposed slightly outward from the positions of the inner ends of the outdoor rail wall portion 3302a and the indoor rail wall portion 3302b. As a result, a groove portion 3302d surrounded by the inner end wall portion 3302c, the inner ends of the outdoor rail wall portion 3302a and the indoor rail wall portion 3302b is formed along the length direction of the indoor guide rail portion 3302 on the inner surface side of the inner end wall portion 3302c.

[0083] The cover part 3303 has a substantially rectangular hollow shape that is long in the prospective direction, and integrally connects the outdoor guide rail part 3301 and the indoor guide rail part 3302 on the outer side of the outdoor guide rail part 3301 and the indoor guide rail part 3302. The outer surface 3303a of the cover part 3303 is a flat surface. The outer surface 3303a of the cover part 3303 abuts against the middle part in the prospective direction of the inner surface 332b of the indoor side frame member 332 via the connecting member 333, starting from the middle part in the prospective direction of the inner surface 331b of the outdoor side frame member 331 of the frame member body 33A. The outdoor guide rail part 3301 is arranged at the end of the outdoor side X1 on the inner surface 3303b of the cover part 3303, and the indoor guide rail part 3302 is arranged at the end of the indoor side X2 on the inner surface 3303b of the cover part 3303.

[0084] An outdoor side extension part 3303c, whose outer surface 3303a extends parallel to the outdoor side X1, is integrally formed on the cover part 3303. The outdoor side extension part 3303c abuts against the inner surface 331b of the outdoor side frame member 331. The end of the outdoor side X1 of the rail member 33B is attached to the outdoor side frame member 331 of the frame member body 33A by a screw 3303d that penetrates through the outdoor side extension part 3303c. An outdoor side engagement groove 3303e is formed near the root of the outdoor side extension part 3303c on the outer surface 3303a of the cover part 3303 to accommodate and engage with an outdoor side engagement convex part 331c that protrudes from the inner surface 331b of the outdoor side frame member 331.

[0085] The cover portion 3303 is integrally formed with an indoor-side extending portion 3303f whose inner surface 3303b extends parallel to the indoor side X2. The indoor-side extending portion 3303f covers the end portion of the inner surface 332b on the indoor side X2 at a distance from the inner surface 332b of the indoor-side frame member 332. The end portion of the indoor-side extending portion 3303f on the indoor side X2 bends toward the inner surface 332b of the indoor-side frame member 332 along a protruding piece 322d extending inward from the end surface 322b on the indoor side X2 of the indoor-side frame member 332, and a folded-back portion 3303g extending toward the outdoor side X1 along the inner surface 332b is integrally formed. An indoor-side engaging groove 3303h for accommodating and engaging the inner end of the protruding piece 322d is formed in the folded-back portion 3303g. The end portion of the folded-back portion 3303g on the outdoor side X1 is engaged with the indoor-side engaging convex portion 332e protruding from the inner surface 332b of the indoor-side frame member 332 from the indoor side X2. The cover portion 3303 suppresses the transmission of the outside air temperature transmitted from the existing vertical frame 23 side to the new vertical frame 33 to the inner peripheral side between the outdoor-side guide rail portion 3301 and the indoor-side guide rail portion 3302 of the new vertical frame 33. An angle member 338, which will be described later, is integrally provided at the end portion of the cover portion 3303 on the indoor side X2.

[0086] As shown in FIG. 8, a resin inter-rail cover 3304 is attached to the inner surface 3303b of the cover portion 3303 of the newly installed vertical frame 33 on the right side when viewed from the outdoor side X1. The inter-rail cover 3304 is arranged across the outdoor guide rail portion 3301 and the indoor guide rail portion 3302 so as to further shield the cover portion 3303. Specifically, the edge portion of the inter-rail cover 3304 on the outdoor side X1 engages with an engaging projection 3301b1 protruding toward the indoor side X2 on the indoor rail wall portion 3301b of the outdoor guide rail portion 3301, and the edge portion of the inter-rail cover 3304 on the indoor side X2 engages with an engaging projection 3302a1 protruding toward the outdoor side X1 on the outdoor rail wall portion 3302a of the indoor guide rail portion 3302, thereby being attached. The inter-rail cover 3304 further suppresses the transmission of the outside air temperature transmitted from the existing vertical frame 23 side to the newly installed vertical frame 33 to the inner peripheral side between the outdoor guide rail portion 3301 and the indoor guide rail portion 3302 of the newly installed vertical frame 33, and improves the heat insulation performance of the newly installed vertical frame 33. A similar inter-rail cover 3304 may also be provided on the inner surface 3303b of the cover portion 3303 of the newly installed vertical frame 33 on the left side when viewed from the outdoor side X1, although not shown in the figure.

[0087] In the newly installed frame 3 in a state of being arranged in a rectangular shape, a pair of left and right newly installed vertical frames 33 in the newly installed frame 3 are arranged on the inner peripheral side of the portion extending from the existing vertical frame 23 to the frame member 101. The outdoor side frame member 331 of the newly installed vertical frame 33 is arranged inside the existing vertical frame 23. As shown in FIGS. 8 and 10, when a gap is formed between the newly installed vertical frame 33 and the frame member 101, the spacer member 303 is arranged so as to fill the gap. The spacer member 303 is composed of one or more sheets. The thickness of the sheet constituting the spacer member 303 and the number of laminated sheets are appropriately set according to the size of the gap between the indoor side frame member 332 of the newly installed vertical frame 33 and the frame member 101. The outer surface 332a and the attachment portion 336 of the indoor side frame member 332 are in contact with and overlap the spacer member 303. The connecting member 333 is arranged inside the spacer member 303. The newly installed vertical frame 33 is fixed to the building body 100 on the indoor side X2 of the existing vertical frame 23 by a screw SC3 that penetrates the attachment portion 336 and the spacer member 303 from the indoor side X2. The screw SC3 penetrates between a pair of ridge portions 3361 of the attachment portion 336. The pair of ridge portions 3361 are in contact with the spacer member 303 and suppress the deformation of the attachment portion 336 when the fastening torque of the screw SC3 acts.

[0088] In a state where the newly installed frame 3 is attached to the inner peripheral side of the existing frame 2, no member for attaching the newly installed vertical frame 33 is interposed between the existing vertical frame 23 and the newly installed vertical frame 33. The newly installed vertical frame 33 is arranged so as to directly face the left and right on the inner peripheral surface of the existing vertical frame 23. Therefore, the newly installed vertical frame 33 can be arranged as close as possible to the existing vertical frame 23. Since the newly installed vertical frame 33 is not fixed to the existing vertical frame 23, even if the existing vertical frame 23 is distorted or the like, it can be attached without being affected by the distorted state. Since the screw SC3 does not contact the existing vertical frame 23, heat is not transmitted between the existing vertical frame 23 and the indoor side frame member 332 of the newly installed vertical frame 33 via the screw SC3.

[0089] An angle member 338 made of resin is attached to the indoor side frame member 332 of the newly installed vertical frame 33. The angle member 338 has an angle part 338a extending toward the indoor side X2 and a standing wall part 338b extending outward from the end of the angle part 338a on the outdoor side X1. The standing wall part 338b is arranged to be continuous with the end face 332c and the protruding piece 332d on the indoor side X2 of the indoor side frame member 332 and extend the end face 332c and the protruding piece 332d inward. The angle part 338a extends from the inner end of the standing wall part 338b toward the indoor side X2 and covers the mounting part 336 from the inside. The expected position of the angle part 338a coincides with the expected positions of the angle parts 319a and 328a of the angle members 319 and 328 of the newly installed upper frame 31 and the newly installed lower frame 32. The found position of the angle part 338a is arranged at a position substantially equal to the found positions of the inner ends of the outdoor side guide rail part 3301 and the indoor side guide rail part 3203. The angle member 338 may be provided separately from the cover part 3303 at a part corresponding to the protruding piece 332d.

[0090] As shown in FIGS. 4, 6, 8, and 10, airtight tapes T1 and T2 made of a resin material or a metal material such as aluminum are adhered to the indoor side X2 part of the newly installed frame 3 fixed by screws SC1, SC2, and SC3. The airtight tape T1 is adhered to the frame member 101. The end of the airtight tape T1 on the outdoor side X1 is adhered across the outdoor side X1 surface 2b of the wall part that protrudes most toward the indoor side X2 of the existing frame 2 from the frame member 101. The end of the airtight tape T1 on the indoor side X2 extends outside the existing upper frame 21, the existing lower frame 22, and the existing vertical frame 23 on the outdoor side X2. The end of the airtight tape T2 on the outdoor side X1 covers the mounting parts 318, 327, 336 and the heads of the screws SC1, SC2, and SC3. The end of the airtight tape T2 on the indoor side X2 extends inside the mounting parts 318, 327, 336 on the indoor side X2 and overlaps the airtight tape T1. Thereby, the airtightness between the existing frame 2 and the newly installed frame 3 is enhanced.

[0091] On the indoor side X2 of the new frame 3 after being fixed to the building body 100, resin decorative covers 51, 52, and 53 are provided over the entire perimeter. The decorative covers 51, 52, and 53 are attached to the angle members 319, 328, and 338 by screws 51a, 52a, and 53a. The decorative cover 51 of the new upper frame 31 extends continuously from the angle portion 319a of the angle member 319 toward the indoor side X2 and is arranged across the frame member 101. The decorative cover 52 of the new lower frame 32 extends continuously from the angle portion 328a of the angle member 328 toward the indoor side X2 and is arranged across the frame member 101. The decorative cover 53 of the new vertical frame 33 extends continuously from the angle portion 338a of the angle member 338 toward the indoor side X2 and is arranged across the frame member 101.

[0092] As shown in FIGS. 4, 6, 8, and 10, the decorative covers 51, 52, and 53 integrally include hollow portions 510, 520, and 530 having a rectangular cross-section that are flush with the angle portions 319a, 328a, and 338a and are arranged on the indoor side X2 of the angle portions 319a, 328a, and 338a, indoor side cover walls 511, 521, and 531 that extend from the ends of the side surfaces 510a, 520a, and 530a on the indoor side X2 of the hollow portions 510, 520, and 530 toward the frame member 101, and fixing portions 512, 522, and 532 that are fixed to the angle members 319, 328, and 338. The side surfaces 510a, 520a, and 530a of the hollow portions 510, 520, and 530 and the indoor side cover walls 511, 521, and 531 form the finding surfaces on the indoor side X2 of the decorative covers 51, 52, and 53.

[0093] On the indoor side cover walls 511, 521, and 531, a plurality of cutout grooves 511a, 521a, and 531a are formed. The cutout grooves 511a, 521a, and 531a are formed along the bases of a plurality of ridges extending in parallel along the length direction of the decorative covers 51, 52, and 53. The plurality of cutout grooves 511a, 521a, and 531a are provided in parallel at a predetermined interval in the finding direction. That is, the cutout grooves 511a and 521a of the decorative covers 51 and 52 of the newly installed upper frame 31 and the newly installed lower frame 32 are arranged in parallel at an interval in the vertical direction. The cutout groove 531a of the decorative cover 53 of the newly installed vertical frame 33 is arranged in parallel at an interval in the horizontal direction. The indoor side cover walls 511, 521, and 531 can be easily cut along any of the cutout grooves 511a, 521a, and 531a by sliding the blade of a cutter or by folding by hand. Therefore, according to the distances between the angle portions 319a, 328a, and 338a of the angle members 319, 328, and 338 and the frame member 101, the operator can cut the indoor side cover walls 511, 521, and 531 at the site at any of the cutout grooves 511a, 521a, and 531a, and can easily adjust the height of the indoor side cover walls 511, 521, and 531 from the frame member 101.

[0094] The fixing portions 512, 522, 532 of the decorative covers 51, 52, 53 are composed of a fixing portion main body 512a, 522a, 532a extending from the hollow portions 510, 520, 530 toward the outdoor side X1, a contact plate portion 512b, 522b, 532b provided so as to extend in the finding direction at the end of the outdoor side X1 of the fixing portion main body 512a, 522a, 532a, and a pair of screw insertion plate portions 512c, 522c, 532c protruding from the fixing portion main body 512a, 522a, 532a toward the back surface of the angle portions 319a, 328a, 338a. The contact plate portions 512b, 522b, 532b of the fixing portions 512, 522, 532 are in contact with the standing wall portions 319b, 328b, 338b of the angle members 319, 328, 338 from the indoor side X2, and define the position of the decorative covers 51, 52, 53 in the expected direction. The screws 51a, 52a, 53a pass through the angle portions 319a, 328a, 338a, pass between the pair of screw insertion plate portions 512c, 522c, 532c, and are screwed into the fixing portion main body 512a, 522a, 532a. When the screws 51a, 52a, 53a are tightened, the contact plate portions 512b, 522b, 532b and the screw insertion plate portions 512c, 522c, 532c are in contact with the back surface of the angle portions 319a, 328a, 338a, and define the position of the decorative covers 51, 52, 53 in the finding direction. Therefore, the decorative covers 51, 52, 53 are fixed without displacement in a state of being positioned at an appropriate position with respect to the angle members 319, 328, 338.

[0095] The decorative covers 51, 52, 53 fixed to the angle members 319, 328, 338 cover the newly installed upper frame 31, newly installed lower frame 32, newly installed vertical frame 33 and spacer members 301, 303 between the angle members 319, 328, 338 and the frame member 101 from the indoor side X2. The heads of the screws SC1, SC2, SC3 are arranged inside the decorative covers 51, 52, 53. The boundaries between the decorative covers 51, 52, 53 and the frame member 101 are shielded throughout the four sides by the L-shaped parting materials 61, 62, 63 fixed to the frame member 101 by the screws 61a, 62a, 63a. Both ends of the upper and lower parting materials 61, 62 are arranged in contact with or close to the upper and lower ends of the vertical parting material 63. The boundary between the parting material 61 and the parting material 63 and the boundary between the parting material 62 and the parting material 63 are each hidden by the corner piece 64.

[0096] Inside the decorative covers 51, 52, 53, heat insulating materials 501, 502, 503 are provided throughout the four sides. The heat insulating materials 501, 502, 503 are made of materials capable of achieving a heat insulating effect, including, for example, resin materials such as extrusion method polystyrene foam, bead method polystyrene, urethane resin, rubber, or vacuum heat insulating materials. The heat insulating materials 501, 502, 503 may be composed of different materials from each other. The heat insulating materials 501, 502, 503 are respectively accommodated throughout the entire length direction of the newly installed upper frame 31, newly installed lower frame 32, and newly installed vertical frame 33. Both ends of each of the heat insulating materials 501, 502, 503 are arranged in contact with or close to both ends of the other heat insulating materials 501, 502, 503 adjacent in the circumferential direction. As a result, while the finding direction of the newly installed frame 3 of the retrofit fitting 1 is configured to be compact, the heat transfer between the outdoor side X1 and the indoor side X2 in the newly installed frame 3 can be further suppressed. Therefore, the heat insulating performance of the retrofit fitting 1 is improved.

[0097] Next, the sliding doors 41, 42 will be described.

[0098] Inside the new frame 3 attached to the inner circumferential side of the existing frame 2, the sliding doors 41, 42 and the screen door 43 are stored so as to be slidable in the left - right direction. Among these, the sliding doors 41, 42 are each made of resin. Specifically, as shown in FIGS. 2 and 3, the sliding doors 41, 42 are formed by rectangularly framing a hollow - shaped extrusion - molded material having a rectangular cross - section made of a metal material such as aluminum over four sides to form metal frame bodies 41A, 42A, resin frame members 41B, 42B that cover the outdoor side X1, indoor side X2, and outer peripheral side of the metal frame bodies 41A, 42A over four sides, and face materials 410, 420 such as glass stored inside the metal frame bodies 41A, 42A and the resin frame members 41B, 42B.

[0099] The upper frame members 41B1, 42B1 of the resin frame members 41B, 42B are provided so as to protrude above the metal frame bodies 41A, 42A, and sandwich the indoor - side guide rail part 3103 and the outdoor - side guide rail part 3101 protruding downward from the new upper frame 31 from the indoor - outdoor direction respectively. As shown in FIG. 4, on the upper end surfaces of the upper frame members 41B1, 42B1, fin - shaped sealing members 401 are provided that elastically contact the indoor - side guide rail part 3103 and the outdoor - side guide rail part 3101 from the indoor - outdoor direction to seal the gaps.

[0100] As shown in FIG. 4, the upper frame members 41B1, 42B1 sandwich the face materials 410, 420 in the indoor - outdoor direction between the upper frame members 41B1, 42B1 and the pressing edges 41B11, 42B11 attached to the upper frame members 41B1, 42B1. The pressing edges 41B11, 42B11 have fin members 41B12, 42B12 made of a soft material that elastically adheres to the surfaces of the face materials 410, 420 on the indoor side X2. Between the upper frame members 41B1, 42B1 and the surfaces of the face materials 410, 420 on the outdoor side X1, packings 41B13, 42B13 made of rubber or resin material are provided. The packings 41B13, 42B13 are attached to the upper frame members 41B1, 42B1 to prevent damage to the face materials 410, 420 and ensure airtightness and watertightness between the upper frame members 41B1, 42B1 and the face materials 410, 420.

[0101] The lower frame members 41B2 and 42B2 of the resin frame members 41B and 42B are provided so as to protrude downward from the metal frame bodies 41A and 42A, and sandwich the indoor guide rail portion 3203 and the outdoor guide rail portion 3201 protruding upward from the newly installed lower frame 32 from the indoor and outdoor directions, respectively. As shown in FIG. 6, on the lower end surfaces of the lower frame members 41B2 and 42B2, fin-shaped sealing members 402 are provided to seal the gaps by elastically contacting the indoor guide rail portion 3203 and the outdoor guide rail portion 3201 from the indoor and outdoor directions. The door wheels 4101 and 4201 provided inside the lower frame members 41B2 and 42B2 are rotatably placed on the guide rail parts 3203g and 3201g of the indoor guide rail portion 3203 and the outdoor guide rail portion 3201.

[0102] As shown in FIG. 6, the lower frame members 41B2 and 42B2 sandwich the facing materials 410 and 420 in the indoor and outdoor directions between the lower frame members 41B2 and 42B2 and the edge pressing members 41B21 and 42B21 attached to the lower frame members 41B2 and 42B2. The edge pressing members 41B21 and 42B21 have fin members 41B22 and 42B22 made of a soft material that elastically adheres to the indoor side X2 surfaces of the facing materials 410 and 420. Packings 41B23 and 42B23 made of rubber or resin material are provided between the lower frame members 41B2 and 42B2 and the outdoor side X1 surfaces of the facing materials 410 and 420. The packings 41B23 and 42B23 are attached to the lower frame members 41B2 and 42B2 to prevent damage to the facing materials 410 and 420 and ensure the airtightness and watertightness between the lower frame members 41B2 and 42B2 and the facing materials 410 and 420.

[0103] As shown in FIGS. 3 and 10, the vertical frame member 41B3 on the door tip side of the resin frame member 41B is provided so as to protrude outward from the metal frame body 41A, and in the fully closed state of the shoji 41, it sandwiches the indoor side guide rail portion 3302 protruding inward from the newly provided vertical frame 33 arranged on the door tip side of the shoji 41 from the indoor-outdoor direction. On the outer end surface of the vertical frame member 41B3, there is provided a fin-shaped sealing member 413 that seals the gap by elastically contacting the indoor side guide rail portion 3302 from the indoor-outdoor direction. As shown in FIG. 3, the vertical frame member 41B4 on the door butt side of the resin frame member 41B is provided so as to protrude outward from the metal frame body 41A.

[0104] As shown in FIGS. 3 and 8, the vertical frame member 42B3 on the door tip side of the resin frame member 42B is provided so as to protrude outward from the metal frame body 42A, and in the fully closed state of the shoji 42, it sandwiches the outdoor side guide rail portion 3301 protruding inward from the newly provided vertical frame 33 arranged on the door tip side of the shoji 42 from the indoor-outdoor direction. On the outer end surface of the vertical frame member 42B3, there is provided a fin-shaped sealing member 403 that seals the gap by elastically contacting the outdoor side guide rail portion 3301 from the indoor-outdoor direction. As shown in FIG. 3, the vertical frame member 42B4 on the door butt side of the resin frame member 42B is provided so as to protrude outward from the metal frame body 42A. In the fully closed state of the shoji 41 and 42, the vertical frame member 41B4 of the shoji 41 and the vertical frame member 42B4 of the shoji 42 are arranged to overlap in the prospective direction.

[0105] As shown in FIGS. 8 and 10, the vertical frame members 41B3 and 42B3 sandwich the facing materials 410 and 420 in the indoor-outdoor direction between the vertical frame members 41B3 and 42B3 and the pressing edges 41B31 and 42B31 attached to the vertical frame members 41B3 and 42B3. The pressing edges 41B31 and 42B31 have fin members 41B32 and 42B32 made of a soft material that elastically adheres to the surfaces on the indoor side X2 of the facing materials 410 and 420. Between the vertical frame members 41B3 and 42B3 and the surfaces on the outdoor side X1 of the facing materials 410 and 420, gaskets 41B33 and 42B33 made of rubber or resin material are provided. The gaskets 41B33 and 42B33 are attached to the vertical frame members 41B3 and 42B3 to prevent damage to the facing materials 410 and 420 and ensure the airtightness and watertightness between the vertical frame members 41B3 and 42B3 and the facing materials 410 and 420.

[0106] As described above, one embodiment of the retrofit fitting of the present disclosure has been described, but the retrofit fitting of the present disclosure can be appropriately changed. For example, the retrofit fitting of the present disclosure is not limited to having the two shoji doors described above. The retrofit fitting of the present disclosure may have three or more shoji doors, or may constitute a single-leaf sliding window having a single shoji door.

[0107] In the retrofit fitting 1 described above, the rail member 33B provided on the newly installed vertical frame 33 does not necessarily have to be provided.

[0108] In the retrofit fitting 1 described above, the newly installed upper frame 31, the newly installed lower frame 32, and the newly installed vertical frame 33 that constitute the newly installed frame 3 have a heat insulation structure in which metal frame members divided in the indoor-outdoor direction are connected by connecting members 313, 323, and 333. Such a heat insulation structure may be provided on at least one of the frame members of the upper, lower, left, and right frame members that constitute the newly installed frame. The newly installed frame 3 does not necessarily have to have a connecting member.

[0109] In the above-described retrofit fitting 1, all the frame members on the top, bottom, left, and right of the new frame 3 are arranged to face the inner peripheral surface of the existing frame 2 without any other members intervening between them. However, the frame member arranged to face the inner peripheral surface of the existing frame 2 in this way may be at least any one of the frame members on the top, bottom, left, and right.

[0110] In the above-described retrofit fitting 1, heat insulating materials 501, 502, and 503 are provided on the frame members on the top, bottom, left, and right of the new frame 3 respectively. However, the heat insulating material may be provided on at least any one of the frame members on the top, bottom, left, and right of the new frame 3. The new frame 3 does not necessarily have to have the heat insulating materials 501, 502, and 503.

[0111] The retrofit fitting of the present disclosure is not limited to being applied to the existing frame 2 having the existing lower frame 22 formed such that the height gradually decreases from the indoor side X2 to the outdoor side X1 as in the above-described retrofit fitting 1. As shown in FIG. 12, the retrofit fitting of the present disclosure is similarly applicable when retrofitting an existing frame having an existing lower frame 220 in which a pair of guide rails 221a and 221b project at the same height.

[0112] In the above-described retrofit fitting 1, an example is shown in which the shoji doors 41 and 42 containing the facing materials 410 and 420 each composed of two layers of glass are attached to the new frame 3. However, the glass constituting the facing materials 410 and 420 is not limited to two layers and may be, for example, three layers. FIGS. 13 and 14 show the retrofit fitting 1 in which the shoji doors 41 and 42 containing the facing materials 410 and 420 each composed of three layers of glass are slidably attached to the new frame 3 having the same configuration as FIGS. 2 and 3.

[0113] Figs. 15 and 16 show the refitted fitting 1A according to the second embodiment. This refitted fitting 1A is configured such that a new frame 3 can be fitted into an existing frame 2 from the indoor side X2. In Figs. 15 and 16, parts denoted by the same reference numerals as those of the refitted fitting 1 according to the first embodiment indicate parts having the same configuration, and thus their descriptions may be incorporated by reference to the descriptions of the refitted fitting 1 and may be omitted hereinafter. The new lower frame of the refitted fitting 1A has the same configuration as the new lower frame 32 of the refitted fitting 1.

[0114] The new upper frame 31Y1 in the refitted fitting 1A is composed of a frame member main body 31A, a rail member 31B, and a new upper frame dividing portion 34 disposed on the outer peripheral side of the frame member main body 31A. The frame member main body 31A in the refitted fitting 1A is not provided with the outdoor side wall portion 315 that the frame member main body 31A in the refitted fitting 1 integrally has. Therefore, the frame member main body 31A does not have an extending plate portion that extends to the outer peripheral side from the upper surface 311a of the outdoor side frame member 311.

[0115] The new upper frame dividing portion 34 is fixed to the existing upper frame 21 via a mounting piece 35. The frame member main body 31A is attached to the inner peripheral side of the existing upper frame 21 to which the new upper frame dividing portion 34 is fixed. The new upper frame dividing portion 34 is disposed between the existing upper frame 21 and the frame member main body 31A by being disposed above the frame member main body 31A. The new upper frame dividing portion 34 is composed of an extruded profile extruded in the length direction from a metal material such as aluminum, or a bent product obtained by bending a metal plate.

[0116] The new upper frame dividing portion 34 extends in the longitudinal direction of the existing upper frame 21 at the lower part of the existing upper frame 21. The new upper frame dividing portion 34 includes an indoor-outdoor direction extending plate 341 that extends in the indoor-outdoor direction below the existing upper frame 21. The indoor-outdoor direction extending plate 341 extends between the guide rails 211a and 211b of the existing upper frame 21 below the guide rails 211a and 211b of the existing upper frame 21.

[0117] The indoor-outdoor extending plate 341 integrally has an outdoor extending portion 3412 that extends toward the outdoor side X1 at a position lower than the upper surface 341a of the indoor-outdoor extending plate 341. The outdoor extending portion 3412 is also a drain groove that allows rainwater that has entered the upper surface of the newly installed upper frame dividing portion 34 to flow in the left-right direction without flowing into the indoor side X2.

[0118] At the most outdoor portion of the outdoor extending portion 3412 on the outdoor side X1, an outdoor upper wall portion 342 that extends upward in the finding direction and an outdoor lower wall portion 343 that extends downward in the finding direction are integrally provided.

[0119] The outdoor upper wall portion 342 protrudes further upward than the upper surface 341a of the indoor-outdoor extending plate 341 and is arranged to overlap the outdoor side surface 211d of the guide rail 211c at the most outdoor side X1 of the existing upper frame 21 from the outdoor side X1. The outdoor upper wall portion 342 is arranged on the outdoor side X1 of the existing upper frame 21 and is arranged along the surface of the outdoor side X1 of the existing upper frame 21.

[0120] The outdoor lower wall portion 343 extends downward from the most outdoor end portion of the outdoor extending portion 3412 on the outdoor side X1. A packing 343a is attached to the indoor side surface X2 of the outdoor lower wall portion 343. The upper part of the guide rail 314c that constitutes the outdoor end surface of the frame member body 31A on the outdoor side X1 abuts against the packing 343a. As a result, the packing 343a seals the portion where the frame member body 31A and the newly installed upper frame dividing portion 34 abut against each other on the outdoor side X.

[0121] The decorative material 316 is detachably attached to the newly installed upper frame dividing portion 34 from the outdoor side X1. The decorative material 316 covers the outdoor upper wall portion 342 and the outdoor lower wall portion 343, extends upward in the finding direction from the existing upper frame 21, and forms the finding surface on the outdoor side X1 of the newly installed upper frame 31. The decorative material 316 covers the sealing material 104 exposed between the existing upper frame 21 and the outer wall material 102 from the outdoor side X1.

[0122] On the outdoor side X1 of the upper surface 341a of the indoor / outdoor extending plate 341, an elastic fin member 344 is provided. The fin member 344 protrudes upward from the upper surface 341a of the indoor / outdoor extending plate 341 so as to be close to the guide rail 211b of the existing upper frame 21.

[0123] In the newly installed upper frame dividing part 34, even if rainwater infiltrates between the outdoor upper side wall part 342 and the guide rail 211c of the existing upper frame 21, it flows in the left - right direction along the outdoor extending part 3412 and is drained to the outer peripheral side of the newly installed vertical frame 33. Therefore, infiltration into the indoor side X2 is suppressed. Even if a large amount of rainwater infiltrates into the outdoor extending part 3412, the fin member 344 prevents the infiltration into the indoor side X2. Since the fin member 344 has elasticity, when the newly installed upper frame dividing part 34 is arranged on the inner peripheral side of the existing upper frame 21, even if it comes into contact with the existing upper frame 21 etc., it can elastically bend and there is no risk of damage.

[0124] The newly installed upper frame dividing part 34 is fixed to the guide rail 211b of the existing upper frame 21 by a screw 35b via an L - shaped mounting piece 35.

[0125] As shown in FIG. 17, the mounting piece 35 has a substrate part 351, a contact part 352, and a screw base part 353 provided between the substrate part 351 and the contact part 352. The substrate part 351 is a part attached to the upper surface 341a of the indoor / outdoor extending plate 341 and is fixed to the indoor / outdoor extending plate 341 by a screw 34a. The contact part 352 contacts the guide rail 211b of the existing upper frame 21 from the indoor side X2. The screw base part 353 is provided so as to obliquely connect the substrate part 351 and the contact part 352. The surface of the screw base part 353 is formed to face obliquely downward on the indoor side X2. The mounting piece 35 is formed, for example, by an extruded profile extruded in the length direction from a metal material such as aluminum, or a bent product obtained by bending a metal plate.

[0126] The newly installed upper frame dividing part 34 is fixed to the inner peripheral side of the existing upper frame 21 by a screw 35b that passes through the screw base part 353 of the mounting piece 35 from diagonally below and is screwed into the guide rail 211b. Although not shown, a through hole through which the screw 35b can be inserted from the lower side of the newly installed upper frame dividing part 34 toward the screw base part 353 is formed in the indoor-outdoor direction extending plate 341 of the newly installed upper frame dividing part 34.

[0127] In the present embodiment, the outdoor upper wall part 342 is provided not on the frame member main body 31A but on the newly installed upper frame dividing part 34. For example, if the outdoor upper wall part 342 is provided on the frame member main body 31A instead of on the newly installed upper frame dividing part 34, similar to the outdoor side wall part 315 of the retrofit fitting 1, when the newly installed upper frame 31Y1 is assembled from the indoor side X2 to the existing upper frame 21, the outdoor upper wall part 342 extending from the frame member main body 31A to the outer peripheral side (upper side) will hit the existing upper frame 21. Therefore, in order to avoid the existing upper frame 21 once, in a state where the new frame is assembled in all four directions, while tilting the newly installed upper frame from the indoor side X2, it is inserted inside the existing frame 2, once taken out to the outdoor side X1, and then pulled toward the existing upper frame 21, there is a need to attach the newly installed upper frame to the existing upper frame 21. When the newly installed upper frame is once taken out to the outdoor side X1, for example, when a surface lattice or shutter is provided on the outdoor side X1, the newly installed frame may hit the surface lattice or shutter provided on the outdoor side X1.

[0128] On the other hand, in the present embodiment, the newly installed upper frame 31Y1 is divided into the frame member main body 31A, the rail member 31B, and the newly installed upper frame dividing part 34. The outdoor upper wall part 342 is provided on the newly installed upper frame dividing part 34, and after the newly installed upper frame dividing part 34 is first attached to the existing upper frame 21, the newly installed frame 3 assembled in all four directions without attaching the newly installed upper frame dividing part 34 is attached to the inner peripheral side of the existing frame 2. As a result, it can be easily attached from the indoor side X2 without inserting the newly installed upper frame from the indoor side X2 into the inner side of the existing upper frame 21 while tilting it and taking it out to the outdoor side X1 once.

[0129] From the same perspective, the newly installed vertical frame 33Y1 in the refitted fitting 1A also does not have an extension plate portion where the frame member main body 33A extends to the outer peripheral side (left and right finding directions), as shown in Fig. 16. That is, on the outdoor side frame member 331 of the frame member main body 33A, there is no outdoor side wall portion 334 that extends outward in the finding direction at the outermost outdoor side X1 portion of the outdoor side frame member 331 in the refitted fitting 1.

[0130] Next, the procedure for installing the refitted fitting 1A will be described. When installing the refitted fitting 1A, first, prepare a newly installed frame 3 that is assembled on all four sides with a newly installed upper frame 31Y1 (frame member main body 31A and rail member 31B), a newly installed lower frame (not shown), and left and right newly installed vertical frames 33 in a state where a newly installed upper frame split portion 34 is not attached to the newly installed frame 3 in advance.

[0131] When installing the refitted fitting 1A, as shown in Fig. 17, first, fix the newly installed upper frame split portion 34 to the lower part of the existing upper frame 21 (newly installed frame split portion fixing step). Specifically, as shown in Figs. 17 and 18, fix the newly installed upper frame split portion 34 to the guide rail 211b for the existing shoji provided on the existing upper frame 21 and protruding downward via the mounting piece 35 with screws 35a, 35b.

[0132] Next, as shown in Fig. 18, with the newly installed upper frame split portion 34 separated from the newly installed upper frame 31, tilt the newly installed frame 3 assembled on all four sides so that the lower end side (newly installed lower frame side) is located more on the outdoor side X1 than the upper end side (newly installed upper frame 31Y1 side), and insert it into the opening of the existing frame 2 from the indoor side X2 of the existing frame 2. While rotating around the lower end side, as shown in Fig. 19, move the frame member main body 31A from the indoor side X2 toward the outdoor side X1 on the indoor side X2 surface of the outdoor side lower wall portion 343 of the newly installed upper frame split portion 34 fixed to the existing upper frame 21. As a result, the upper part of the guide rail 314c on the outdoor side X1 of the frame member main body 31A abuts against the packing 343a of the outdoor side lower wall portion 343 and is attached to the existing frame 2 (newly installed frame attachment step).

[0133] Here, in the newly installed upper frame 31Y1 in a state where the newly installed upper frame dividing portion 34 is separated, on the outdoor side X1, there is an extension plate portion that projects and extends in the finding direction on the building body 100 side, that is, the outdoor side wall portion 315 of the newly installed upper frame 31 and the outdoor side wall portion 334 of the newly installed vertical frame 33 that were provided in the retrofit fitting 1 are not provided. As a result, since the newly installed upper frame 31Y1 and the left and right newly installed vertical frames 33 do not collide with the existing frame 2, it is not necessary to once move the side of the newly installed upper frame 31Y1 to the outdoor side X1 of the existing frame 2 and then pull it to the indoor side X2 and attach it to the existing frame 2. That is, the newly installed frame 3 can be easily attached to the existing frame 2 from the indoor side X2. Thereby, the workability of the retrofit fitting 1A can be improved.

[0134] Thereafter, as shown in FIG. 19, the attachment portion 318 of the newly installed upper frame 31Y1 is fixed to the building body 100 with the screw SC1. At this time, a spacer member 301 is interposed in the gap formed between the attachment portion 318 of the newly installed upper frame 31Y1 and the building body 100.

[0135] Subsequently, as shown in FIG. 20, on the outdoor side X1, the decorative material 316 is attached to the outdoor side X1 of the newly installed upper frame dividing portion 34. On the indoor side X2, the decorative cover 51 is attached to the angle member 319 of the newly installed upper frame 31Y1. An L-shaped parting material 61 is attached at the boundary between the decorative cover 51 and the inner peripheral surface of the frame member 101. Although not shown, a decorative cover 53 is similarly attached to the newly installed vertical frame 33Y1. Heat insulating materials may be accommodated inside the decorative covers 51 and 53 in the same manner as the heat insulating materials 501 and 503 of the retrofit fitting 1.

[0136] FIGS. 21 to 23 show a retrofit fitting 1B according to the third embodiment. This retrofit fitting 1B has a different configuration of the rail member compared to the retrofit fitting 1 according to the first embodiment and the retrofit fitting 1A according to the second embodiment. In FIGS. 21 to 23, parts having the same reference numerals as those of the retrofit fitting 1 according to the first embodiment and the retrofit fitting 1A according to the second embodiment indicate parts having the same configuration, and thus their descriptions may be omitted below by referring to the descriptions in the retrofit fitting 1.

[0137] As shown in FIG. 21, in the refitted fitting 1B, the newly installed upper frame 31Y2 is composed of a frame member main body 36A and a resin rail member 36B. The rail member 36B covers the lower side of the frame member main body 36A, and the upper frame members 41B1 and 42B1 of the shoji 41 and 42 straddle the rail member 36B (outdoor side guide rail portion 3601, indoor side guide rail portion 3602) and are arranged so as to sandwich the rail member 36B (outdoor side guide rail portion 3601, indoor side guide rail portion 3602) from the indoor-outdoor direction, thereby guiding the sliding movement of the shoji 41 and 42.

[0138] The frame member main body 36A is divided into two in the prospective direction into an outdoor side frame member 361 and an indoor side frame member 362. Both the outdoor side frame member 361 and the indoor side frame member 362 are metal frame members, and each is made of an extruded profile extruded in the length direction from a metal material such as aluminum. The outdoor side frame member 361 and the indoor side frame member 362 are integrally connected by a pair of upper and lower connecting members 363. The connecting member 363 is made of a member having heat insulation properties such as resin, and blocks the heat transfer from the outdoor side frame member 361 to the indoor side frame member 362 in the frame member main body 36A. The frame member main body 36A is not provided with a guide rail for guiding the sliding movement of the shoji 41 and 42.

[0139] The outdoor side frame member 361 and the indoor side frame member 362 each have a hollow portion 3611 and 3621. The upper surface 361a of the outdoor side frame member 361 corresponding to the hollow portion 3611 forms an inclined surface that slopes downward from the indoor side X2 toward the outdoor side X1. The upper surface 362a of the indoor side frame member 362 corresponding to the hollow portion 3621 is a flat surface. The portion 361a1 located at the uppermost position of the upper surface 361a of the outdoor side frame member 361 is arranged flush with the upper surface 362a of the indoor side frame member 362 in the prospective direction. The connecting member 363 does not protrude above the portion 361a1 of the upper surface 361a of the outdoor side frame member 361 and the upper surface 362a of the indoor side frame member 362.

[0140] The outdoor frame member 361 integrally has an outdoor extending portion 3612 that extends toward the outdoor side X1 at a position lower than the upper surface 361a of the outdoor frame member 361. The outdoor extending portion 3612 is disposed at the end of the outdoor side X1 of the newly installed upper frame 31Y2. The outdoor extending portion 3612 is also a drainage groove that allows rainwater that has entered onto the newly installed upper frame 31Y2 to flow in the left - right direction without flowing into the indoor side X2.

[0141] On the most outdoor - side X1 part of the outdoor extending portion 3612, an outdoor side wall portion 364 that extends upward in the finding direction is integrally provided. The outdoor side wall portion 364 protrudes further upward than the upper surfaces 361a and 362a of the outdoor frame member 361 and the indoor frame member 362, and is arranged to overlap the outdoor side surface 211d of the guide rail 211c on the most outdoor - side X1 of the existing upper frame 21 from the outdoor side X1. The decorative material 316 is detachably attached to the outdoor side wall portion 364 from the outdoor side X1.

[0142] At the most indoor - side X2 part of the frame member body 36A, a mounting portion 365 for fixing the newly installed upper frame 31Y2 to the building body 100 is integrally provided. The mounting portion 365 is arranged parallel to the upper surface 362a of the indoor frame member 322, and extends in a plate - like shape toward the indoor side X2 from above the indoor - side X2 end surface 362b of the indoor frame member 362. The frame member body 36A is fixed to the building body 100 by a screw SC1 that penetrates the mounting portion 365.

[0143] The rail member 36B extends over the entire length in the longitudinal direction of the frame member body 36A so as to cover from the lower surface 361b of the outdoor frame member 361 to the lower surface 362c of the indoor frame member 362, specifically, the lower surface of the frame member body 36A. The rail member 36B is attached to the frame member body 36A by screws 36a and 36b.

[0144] The rail member 36B has three hollow portions 366a, 366b, and 366c arranged adjacent to each other in the indoor-outdoor direction. The upper surface 366d formed flush in the indoor-outdoor direction across the three hollow portions 366a, 366b, and 366c is a flat surface. The upper surface 366d is arranged to face from the lower surface 361b of the outdoor side frame member 361 to the lower surface 362c of the indoor side frame member 362.

[0145] On the lower surface 366e formed in the indoor-outdoor direction across the three hollow portions 366a, 366b, and 366c, a resin-made outdoor side guide rail portion 3601, an indoor side guide rail 3602, and a screen door guide rail 3603 protruding downward are integrally provided. The outdoor side guide rail portion 3601 protrudes downward from the end of the outdoor side X1 of the central hollow portion 366b. The indoor side guide rail portion 3602 protrudes downward from the end of the indoor side X2 of the central hollow portion 366b. The screen door guide rail 3603 protrudes downward from the end of the outdoor side X1 of the outermost outdoor side X1 hollow portion 366a. At the end of the innermost indoor side X2 of the hollow portion 366c, a resin-made indoor side protruding portion 3604 protruding downward more than the outdoor side guide rail portion 3601, the indoor side guide rail 3602, and the screen door guide rail 3603 is integrally provided.

[0146] An attachment portion 367 is integrally formed at the end of the rail member 36B on the innermost indoor side X2. The attachment portion 367 extends in a plate shape from the upper end portion of the innermost indoor side X2 of the hollow portion 366c toward the indoor side X2.

[0147] The frame member body 36A and the rail member 36B are fixed by screws 36a on the outdoor side X1 and by screws 36b on the indoor side X2 in a state where the upper surfaces 366d extending over the three hollow portions 366a, 366b, 366c of the rail member 36B face the lower surfaces 361b, 361c of the frame member body 36A. The screw 36a is screwed in from above the outdoor side extension portion 3612 of the frame member body 36A so as to penetrate the upper surface 366d toward the hollow portion 366a on the outdoor side X1 of the rail member 36B. The screw 36b is screwed in obliquely upward from below on the indoor side X2 of the rail member 36B so as to penetrate the mounting portion 367 and the lower surface 362c of the indoor side frame member 362 of the frame member body 36A.

[0148] The angle member 319 disposed on the indoor side X2 of the newly installed upper frame 31Y2 is provided separately from the rail member 36B. The angle member 319 is attached by screws 319c in a state where the standing wall portion 319b abuts on the hollow portion 366c on the indoor side X2 of the rail member 36B from the indoor side X2.

[0149] As shown in FIG. 22, in the refitted fitting 1B, the newly installed lower frame 32Y2 is composed of a frame member body 37A and a resin rail member 37B. The rail member 37B covers the upper side of the frame member body 37A, and the lower frame members 41B2, 42B2 of the sliding doors 41, 42 straddle the rail member 37B (outdoor side guide rail portion 3701, indoor side guide rail portion 3702) and are arranged so as to sandwich the rail member 37B (outdoor side guide rail portion 3701, indoor side guide rail portion 3702) from the indoor and outdoor directions, thereby guiding the sliding movement of the sliding doors 41, 42.

[0150] The frame member body 37A is divided into two parts in the prospective direction into an outdoor side frame member 371 and an indoor side frame member 372. Both the outdoor side frame member 371 and the indoor side frame member 372 are metal frame members, each consisting of an extruded profile extruded in the length direction from a metal material such as aluminum. The outdoor side frame member 371 and the indoor side frame member 372 are integrally connected by a pair of upper and lower connecting members 373. The connecting member 373 is made of a heat insulating member such as resin, and blocks the heat transfer from the outdoor side frame member 371 to the indoor side frame member 372 in the frame member body 37A. The frame member body 37A is not provided with a guide rail for guiding the sliding movement of the shoji 41, 42.

[0151] The outdoor side frame member 371 has two hollow portions 3711 and 3712 in order from the outdoor side X1. The indoor side frame member 372 has two hollow portions 3721 and 3722 in order from the outdoor side X1. The upper surface 371a of the outdoor side frame member 371 across the hollow portions 3711 and 3712 is a flat surface flush in the indoor-outdoor direction. The upper surface 372a of the indoor side frame member 372 across the hollow portions 3721 and 3722 is a flat surface flush in the indoor-outdoor direction. The connecting member 373 does not protrude above the upper surface 371a of the outdoor side frame member 371 and the upper surface 372a of the indoor side frame member 372.

[0152] An outdoor side wall portion 374 extending downward is integrally provided at the end of the outdoor side X1 of the outdoor side frame member 371. The height adjusting member 325 of the new lower frame 32Y2 is attached to the lower end portion of the outdoor side wall portion 374. The decorative material 326 is detachably attached to the outdoor side wall portion 374 from the outdoor side X1.

[0153] An attachment portion 375 for fixing the new lower frame 32Y2 to the building body 100 is integrally provided at the most indoor side X2 portion of the frame member body 37A. The attachment portion 375 is arranged parallel to the lower surface 372c of the indoor side frame member 372, and extends in a plate shape from the lower part of the indoor side X2 end surface 372b of the indoor side frame member 372 toward the indoor side X2. The frame member body 37A is fixed to the building body 100 by a screw SC2 passing through the attachment portion 375.

[0154] The rail member 37B covers the upper surface of the frame member main body 37A, specifically, extends over the entire length in the longitudinal direction of the frame member main body 37A so as to cover from the upper surface 371a of the outdoor side frame member 371 to the upper surface 372a of the indoor side frame member 372. The rail member 37B is attached to the frame member main body 37A by screws 37a, 37b.

[0155] The rail member 37B has three hollow portions 376a, 376b, 376c arranged adjacent to each other in the indoor-outdoor direction. The lower surface 376d formed flush in the indoor-outdoor direction across the three hollow portions 376a, 376b, 376c is a flat surface. The lower surface 376d is arranged to face from the upper surface 371a of the outdoor side frame member 371 to the upper surface 372a of the indoor side frame member 372.

[0156] On the upper surface 376e formed in the indoor-outdoor direction across the three hollow portions 376a, 376b, 376c, a resin-made outdoor side guide rail portion 3701, an indoor side guide rail 3702, and a screen door guide rail 3703 protruding upward are integrally provided. The outdoor side guide rail portion 3701 protrudes upward from the outdoor side X1 end of the central hollow portion 376b. The indoor side guide rail portion 3702 protrudes upward from the indoor side X2 end of the central hollow portion 376b. The screen door guide rail 3703 protrudes upward from the outdoor side X1 end of the outermost outdoor side X1 hollow portion 376a. At the indoor side X2 end of the innermost indoor side X2 hollow portion 376c, a resin-made indoor side protruding portion 3704 protruding upward more than the outdoor side guide rail portion 3701, the indoor side guide rail 3702, and the screen door guide rail 3703 is integrally provided.

[0157] An attachment portion 377 is integrally formed at the innermost indoor side X2 end of the rail member 37B. The attachment portion 377 extends in a plate shape from the lower end portion of the innermost indoor side X2 hollow portion 376c toward the indoor side X2.

[0158] Inside the central hollow portion 376b of the rail member 37B, a core member 378 is accommodated. The core member 378 may be constituted by an extruded profile extruded in the longitudinal direction from a metal material such as aluminum, or a bent product obtained by bending a metal plate material, or may be constituted by a drawn product containing carbon fiber and a resin such as epoxy and drawn. The core member 378 has one core member hollow portion 378a having a rectangular cross section and a protruding wall portion 378b protruding from the core member hollow portion 378a toward the outdoor side X1, and has an outer shape along the inner surface of the hollow portion 376a of the rail member 37B as a whole. The protruding wall portion 378b extends from the upper end surface of the outdoor side X1 of the core member hollow portion 378a toward the outdoor side X1 and is bent downward. The lower end portion of the protruding wall portion 378b bent downward is bent toward the indoor side X2.

[0159] The frame member main body 37A and the rail member 37B are fixed by screws 37a on the outdoor side X1 and by screws 37b on the indoor side X2 with the lower surface 376d of the rail member 37B facing the upper surfaces 371a, 372a of the frame member main body 37A across the three hollow portions 376a, 376b, 376c. The screw 37a is screwed in from below the frame member main body 37A so as to penetrate the upper surface 371a corresponding to the hollow portion 3711 on the outdoor side X1 and the lower surface 376d toward the hollow portion 376a on the outdoor side X1 of the rail member 37B. An insertion hole 3711a for inserting the screw 37a from below is formed in the lower surface of the hollow portion 3711 of the frame member main body 37A. The screw 37b is screwed in obliquely downward from above the indoor side X2 of the rail member 37B so as to penetrate the mounting portion 377 and the upper surface 372a of the indoor side frame member 372 of the frame member main body 37A.

[0160] The angle member 328 disposed on the indoor side X2 of the newly installed lower frame 32Y2 is provided separately from the rail member 37B. The angle member 328 is attached by a screw 328c with the standing wall portion 328b in contact with the hollow portion 376c on the indoor side X2 of the rail member 37B from the indoor side X2.

[0161] As shown in FIG. 23, in the refitted fitting 1B, the newly installed vertical frame 33Y2 is composed of a frame member main body 38A and a resin rail member 38B. The rail member 38B covers the inner side of the frame member main body 38A, and the vertical frame members 41B3 and 42B3 of the sliding doors 41 and 42 straddle the rail member 38B (outdoor side guide rail portion 3801, indoor side guide rail portion 3802) and are arranged so as to sandwich the rail member 38B (outdoor side guide rail portion 3801, indoor side guide rail portion 3802) from the indoor-outdoor direction, thereby guiding the sliding movement of the sliding doors 41 and 42.

[0162] The frame member main body 38A is divided into two parts in the prospective direction into an outdoor side frame member 381 and an indoor side frame member 382. Both the outdoor side frame member 381 and the indoor side frame member 382 are metal frame members, and each is made of an extruded profile extruded in the length direction from a metal material such as aluminum. The outdoor side frame member 381 and the indoor side frame member 382 are integrally connected by a pair of left and right connecting members 383. The connecting member 383 is made of a member having heat insulation properties such as resin, and blocks the heat transfer from the outdoor side frame member 381 to the indoor side frame member 382 in the frame member main body 38A.

[0163] The position of the connecting member 383 in the prospective direction in the newly installed vertical frame 33Y2 coincides with the position of the connecting members 363 and 373 in the prospective direction in the newly installed upper frame 31Y2 and the newly installed lower frame 32Y2. The upper and lower end portions of the connecting member 383 are arranged in contact or close to the left and right end portions of the connecting members 363 and 373 of the newly installed upper frame 31Y2 and the newly installed lower frame 32Y2. The connecting members 363, 373, and 383 are substantially continuous over the four circumferences of the newly installed frame 3.

[0164] The outdoor frame member 381 has a hollow portion 3811 with a substantially rectangular cross-section. The indoor frame member 382 has a hollow portion 3821 with a substantially rectangular cross-section. The outer surface 381a of the outdoor frame member 381 corresponding to the hollow portion 3811 and the outer surface 382a of the indoor frame member 382 corresponding to the hollow portion 3821 are both flat surfaces and are arranged flush in the prospective direction of the new vertical frame 33Y2. The connecting member 383 does not protrude outward beyond these outer surfaces 381a, 382a. The inner surface 381b of the outdoor frame member 381 corresponding to the hollow portion 3811 and the inner surface 382b of the indoor frame member 382 corresponding to the hollow portion 3821 are both flat surfaces and are arranged flush in the prospective direction of the new vertical frame 33Y2. The connecting member 383 does not protrude inward beyond these inner surfaces 381b, 382b.

[0165] An outdoor side wall portion 384 extending outward in the finding direction is integrally provided at the outermost outdoor side X1 portion of the outdoor frame member 381. The outdoor side wall portion 384 protrudes further outward in the finding direction than the outer surfaces 381a, 382a of the outdoor frame member 381 and the indoor frame member 382, and is arranged to overlap the outermost outdoor side X1 end face 23a of the existing vertical frame 23 from the outdoor side X1. The decorative material 335 is detachably attached to the outdoor side wall portion 384 from the outdoor side X1.

[0166] An attachment portion 385 used to fix the new vertical frame 33Y2 to the building body 100 is integrally provided at the innermost indoor side X2 portion of the indoor frame member 382. The attachment portion 385 extends plate-like from the indoor side X2 end face 382c of the indoor frame member 382 toward the indoor side X2. The attachment portion 385 is arranged parallel to the outer surfaces 381a, 382a of the outdoor frame member 381 and the indoor frame member 382. The frame member body 38A is fixed to the building body 100 by a screw SC3 passing through the attachment portion 385.

[0167] The rail member 38B covers the inner surface of the frame member main body 38A, specifically, from the inner surface 381b of the outdoor frame member 381 to the inner surface 382b of the indoor frame member 382, and extends over the entire length of the frame member main body 38A in the longitudinal direction. The rail member 38B is attached to the frame member main body 38A by screws 38a and 38b.

[0168] The rail member 38B has three hollow portions 386a, 386b, and 386c arranged adjacent to each other in the indoor-outdoor direction. The outer surface 386d formed flush in the indoor-outdoor direction across the three hollow portions 386a, 386b, and 386c is a flat surface. The outer surface 386d is arranged to face from the inner surface 381b of the outdoor frame member 381 to the inner surface 382b of the indoor frame member 382.

[0169] On the inner surface 386e formed in the indoor-outdoor direction across the three hollow portions 386a, 386b, and 386c, a resin-made outdoor guide rail portion 3801, an indoor guide rail 3802, and a screen door guide rail 3803 that protrude inward are integrally provided. The outdoor guide rail portion 3801 protrudes inward from the end of the outdoor side X1 of the central hollow portion 386b. The indoor guide rail portion 3802 protrudes inward from the end of the indoor side X2 of the central hollow portion 386b. The screen door guide rail 3803 protrudes inward from the end of the outdoor side X1 of the outermost outdoor side X1 hollow portion 386a. At the end of the innermost indoor side X2 of the hollow portion 386c, a resin-made indoor side protruding portion 3804 that protrudes inward more than the outdoor guide rail portion 3801, the indoor guide rail 3802, and the screen door guide rail 3803 is integrally provided.

[0170] An attachment portion 387 is integrally formed at the innermost indoor side X2 end of the rail member 38B. The attachment portion 387 extends in a plate shape from the outer end of the innermost indoor side X2 hollow portion 386c toward the indoor side X2.

[0171] The frame member body 38A and the rail member 38B are fixed by screws 38a on the outdoor side X1 and by screws 38b on the indoor side X2 with the outer surfaces 386d of the three hollow portions 386a, 386b, 386c of the rail member 38B facing the outer surfaces 381b, 382b of the frame member body 38A. The screw 38a is screwed in from the outside of the frame member body 38A so as to penetrate the inner surface 381b corresponding to the hollow portion 3811 on the outdoor side X1 and the outer surface 386d toward the hollow portion 386a on the outdoor side X1 of the rail member 38B. An insertion hole 3811a for inserting the screw 38a from the outside is formed on the outer surface of the hollow portion 3811 of the frame member body 38A. The screw 38b is screwed in obliquely outward from the inside on the indoor side X2 of the rail member 38B so as to penetrate the mounting portion 387 and the inner surface 382b of the indoor side frame member 382 of the frame member body 38A.

[0172] The angle member 338 disposed on the indoor side X2 of the newly installed vertical frame 33Y2 is provided separately from the rail member 38B. The angle member 338 is attached by a screw 388c with the standing wall portion 388b abutting against the hollow portion 386c on the indoor side X2 of the rail member 38B from the indoor side X2.

[0173] The refitting fittings 1, 1A, 1B of the above embodiments have the following effects.

[0174] The refitting fittings 1, 1A, 1B include an existing frame 2 attached to an opening of a building body 100, a newly installed frame 3 attached to the four circumferences on the inner peripheral side of the existing frame 2, and at least one resin-made shoji 41, 42 housed slidably in the left-right direction inside the newly installed frame 3. Among the upper, lower, left, and right frame members constituting the newly installed frame 3, the newly installed upper frames 31, 31Y1, 31Y2 and the newly installed lower frames 32, 32Y2, which are at least the upper and lower frame members, are composed of frame member bodies 31A, 32A, 36A, 37A containing metal and rail members 31B, 32B, 36B, 37B that cover the frame member bodies 31A, 32A, 36A, 37A and guide the sliding movement of the shoji 41, 42.

[0175] According to this, resin rail members 31B, 32B, 36B, and 37B are provided on at least the new upper frames 31, 31Y1, 31Y2 and the new lower frames 32, 32Y2 of the new frame 3, and the resin sliding doors 41, 42 are slidably housed in these rail members 31B, 32B, 36B, 37B, so that the heat insulation performance of the refitted fittings 1, 1A, 1B is improved.

[0176] In the refitted fittings 1, 1A, 1B, the new frame 3 is assembled in a square shape and fixed to the inner peripheral side of the existing frame 2.

[0177] According to this, the new frame 3 can be easily attached and constructed to the inner peripheral side of the existing frame 2.

[0178] In the refitted fittings 1, 1A, 1B, the frame member bodies 31A, 32A, 36A, 37A are composed of outdoor side frame members 311, 321, 361, 371 which are a plurality of metal frame members divided in the indoor-outdoor direction, and heat insulating connecting members 313, 323, 363, 373 which integrally connect the outdoor side frame members 311, 321, 362, 372.

[0179] According to this, the heat transfer between the outdoor side X1 and the indoor side X2 in the frame member bodies 31A, 32A, 36A, 37A is blocked by the connecting members 313, 323, 363, 373, so that the heat insulation performance of the refitted fittings 1, 1A, 1B is further improved.

[0180] In the refitted fittings 1, 1B, the frame member bodies 31A, 32A, 36A, 37A are arranged to face the inner peripheral surface of the existing frame 2, and are fixed to the building body 100 on the indoor side X2 of the existing frame 2 by screws SC1, SC2 which are fixing members passing through the part on the indoor side X2 of the connecting members 313, 323, 363, 373.

[0181] According to this, in a state where the new frame 3 is attached to the inner peripheral side of the existing frame 2, at least between the existing upper frame 21 and the existing lower frame 22, and the new upper frames 31, 31Y2 and the new lower frames 32, 32Y2, there is no member for attaching the new frame 3 to the existing frame 2. Therefore, at least the new upper frames 31, 31Y2 and the new lower frames 32, 32Y2 can be arranged as closely as possible to the existing upper frame 21 and the existing lower frame 22. For this reason, it is possible to construct the retrofit fitting 1, 1B with dimensions in the finding direction of the frame member being as compact as possible. Since at least the new upper frames 31, 31Y2 and the new lower frames 32, 32Y2 are not fixed to the existing upper frame 21 and the existing lower frame 22, they can be attached without being affected by the distortion state of the existing upper frame 21 and the existing lower frame 22. Therefore, the workability of the new frame 3 is improved. Since the screws SC1, SC2, which are fixing members, do not contact at least the existing upper frame 21 and the existing lower frame 22, heat is not transferred between the existing upper frame 21 and the existing lower frame 22 and the indoor side X2 via the screws SC1, SC2 and the connecting members 313, 323, 363, 373 of the new upper frames 31, 31Y2 and the new lower frames 32, 32Y2, and the heat insulation property is excellent.

[0182] The frame member bodies 31A, 32A, 36A, 37A have attachment portions 318, 327, 365, 375 that extend toward the indoor side X2 and through which the screws SC1, SC2, which are fixing members, pass.

[0183] According to this, by passing the screws SC1, SC2, which are fixing members, through the attachment portions 318, 327, 365, 375 that extend from the new upper frames 31, 31Y1, 31Y2 and the new lower frames 32, 32Y2 toward the indoor side X2, the new upper frames 31, 31Y1, 31Y2 and the new lower frames 32, 32Y2 can be easily fixed to the building body 100 from the indoor side X2, so the workability is further improved.

Explanation of reference numerals

[0184] 1, 1A, 1B refitting fixtures, 2 existing frame, 3 new frame, 31, 31Y1, 31Y2 new upper frames, 32, 32Y2 new lower frames, 31A, 32A, 36A, 37A frame member bodies, 31B, 32B, 36B, 37B rail members, 311, 321, 361, 371 outdoor side frame members (metal frame members), 312, 322, 362, 372 indoor side frame members (metal frame members), 313, 323, 363, 373 connecting members, 318, 327, 365, 375 attachment parts, 41, 42 shoji, SC1, SC2 screws (fixing members), X2 indoor side, 100 building body

Claims

1. a new frame attached to the inner periphery of an existing frame attached to an opening in the building frame; At least one resin shoji screen is installed on the inner periphery of the new frame so as to be slidable in the left-right direction, At least the upper and lower frame members of the upper, lower, left and right frame members constituting the new frame have a frame member body containing metal and a rail member along which the shoji screen slides, the rail member includes a metal guide rail portion rising from the frame member main body and a resin guide rail portion engaged with the metal guide rail portion, The resin guide rail portion has an interior rail wall portion disposed on the interior side of the metal guide rail portion, The upper end and the lower end of the indoor rail wall portion are disposed at substantially the same position in the projection direction, A renovation fitting in which the lower end of the indoor rail wall portion arranged on the lower frame member is arranged in contact with the lower frame member.

2. A renovated fixture as described in claim 1, having an exterior cover portion extending from the rail member toward the interior side of the room.

3. The shoji screen includes a door roller mounted on the rail member, The remodeled fitting according to claim 1 or 2, wherein the portion of the rail member that abuts against the door roller is made of metal.

4. An existing frame that can be attached to the opening of the building frame, A new frame attached to the inner periphery side of the existing frame; At least one resin shoji screen is installed on the inner periphery of the new frame so as to be slidable in the left-right direction, At least the upper and lower frame members of the upper, lower, left and right frame members constituting the new frame have a frame member body containing metal and a rail member along which the shoji screen slides, the rail member includes a metal guide rail portion rising from the frame member main body and a resin guide rail portion engaged with the metal guide rail portion, The resin guide rail portion has an interior rail wall portion disposed on the interior side of the metal guide rail portion, The upper end and the lower end of the indoor rail wall portion are disposed at substantially the same position in the projection direction, A fixture in which the lower end of the indoor rail wall portion arranged on the lower frame member is arranged in contact with the lower frame member.

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