Renovation window frames

Abstract

To provide a renovated sash for allowing base materials to be screwed to fixed surfaces without being inclined.SOLUTION: A renovated sash 1 includes existing frames remaining in an opening 2 of a building, new frames mounted covering an area on the inner periphery side of the existing frames, and base materials 130, 230, 330, 430 arranged between the existing frames and the new frames. The ends on the indoor side of the base materials are mounted at clearances D from mounted faces, respectively. For example, at the ends on the indoor side of the base materials 130, 230, 330, 430, there are protruded leg parts 133a, 133b, 235a, 235b, 235c, 333, 433 protruded toward the mounted face so that the clearances D are formed between the front ends of the protruded leg parts and the mounted face.SELECTED DRAWING: Figure 13

Description

Technical Field

[0001] The present invention relates to a retrofit sash for retrofitting an existing window provided in a building with a new window.

Background Art

[0002] Conventionally, as a method for retrofitting an existing window, a covering method has been adopted. In the retrofit sash retrofitted by this covering method, a new frame is attached so as to cover the inner peripheral side of an existing frame attached to an opening of a building (see, for example, Patent Document 1).

[0003] Also, as a retrofit sash, there is known one provided with a base material serving as an attachment surface of a new frame between an existing frame and a new frame (see, for example, Patent Documents 2 and 3). The base material is attached so as to cover the inner peripheral side of the existing frame across the indoor-outdoor direction of the existing frame. At this time, the indoor-side end portion of the base material is screwed and fixed to the indoor side of the existing frame (for example, a frame member or an angle portion of the existing frame).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] When attaching a base material to an existing frame, a sealant may be provided between the indoor end of the base material and the mounting surface (the surface of the frame member or the angle part of the existing frame) to ensure watertightness between the base material and the existing frame. In this case, when the base material is screwed in, the indoor end of the base material will protrude inward by the thickness of the sealant, which may cause the base material to be installed at an angle relative to the existing frame. On the indoor side, an angle cover may be attached via a newly installed frame, and the tilt of the base material may lead to the tilt of the angle cover. .

[0006] Therefore, book Disclosure teeth, Suppresses tilting of angle cover The objective is to provide a remodeling sash that can be used for this purpose. [Means for solving the problem]

[0007] This disclosure is the opening of the building to Remaining existing frame It is located on the inner circumference side. Newly established slot and , base material to be placed between the existing frame and the new frame and Renovation sash equipped with in The indoor end of the base material is the mounting surface. and between The present invention relates to a remodeled sash having a sealing material, an angle cover positioned on the indoor side of the base material, and the newly installed frame having an angle portion, the angle portion being positioned on the inner circumference side of the angle cover. . [Brief explanation of the drawing]

[0008] [Figure 1] This is a front view of a remodeled sash according to one embodiment. [Figure 2] Figure 1 shows a vertical cross-sectional view of the remodeled window frame. [Figure 3] Figure 1 shows a cross-sectional view of the remodeled window frame. [Figure 4] Figure 2 is a magnified vertical cross-sectional view showing the upper key portion of the remodeled window frame. [Figure 5] Figure 2 is a close-up vertical cross-sectional view showing the lower key part of the remodeled window frame. [Figure 6] This is a cross-sectional view showing a magnified view of the left side of the remodeled window frame shown in Figure 2. [Figure 7] This is a cross-sectional view showing a magnified view of the right-hand side of the remodeled window frame shown in Figure 2. [Figure 8] It is a perspective view showing a state where a base material is attached to the inner peripheral side of the existing frame of the modified sash. [Figure 9] It is a perspective view of the upper frame base material. [Figure 10] It is a partial perspective view of the upper frame base material seen from the back side. [Figure 11] It is a front view of the attachment member seen from the indoor side. [Figure 12] It is a longitudinal sectional view of the attachment member. [Figure 13] It is a view for explaining the attachment structure of the end portion on the indoor side of the upper frame base material. [Figure 14] It is a perspective view of the lower frame base material. [Figure 15] It is a view for explaining the attachment structure of the end portion on the indoor side of the lower frame base material. [Figure 16] It is a sectional view of the height adjustment mechanism seen from the front. [Figure 17] It is a sectional view of the height adjustment mechanism seen from the side. [Figure 18] It is a perspective view of the back side of the vertical frame base material seen from the outdoor side. [Figure 19] It is a view for explaining the attachment structure of the end portion on the indoor side of the vertical frame base material.

Mode for Carrying Out the Invention

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a modified sash according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the modified sash shown in FIG. 1, and FIG. 3 is a transverse sectional view of the modified sash shown in FIG. 1. FIG. 4 is a longitudinal sectional view showing an enlarged view of the main part on the upper side of the modified sash shown in FIG. 2, FIG. 5 is a longitudinal sectional view showing an enlarged view of the main part on the lower side of the modified sash shown in FIG. 2, FIG. 6 is a transverse sectional view showing an enlarged view of the main part on the left side of the modified sash shown in FIG. 2, and FIG. 7 is a transverse sectional view showing an enlarged view of the main part on the right side of the modified sash shown in FIG. 2. Further, FIG. 8 is a perspective view showing a state where a base material is attached to the inner peripheral side of the existing frame of the modified sash.

[0010] As shown in FIG. 1, the modified sash 1 according to the present invention is attached to the outdoor side of the opening 2 of a building, and includes a window frame 10 framed in a rectangle by an upper frame 100, a lower frame 200, and a pair of left and right vertical frames 300, 400, a shoji 20 that is openably housed in the window frame 10, and a screen door 30 that is slidably housed in the window frame 10 on the indoor side of the shoji 20. On the inner peripheral side of the opening 2, a frame member 3 is provided over the entire circumference. FIG. 1 shows the modified sash 1 as viewed from the outdoor side.

[0011] As shown in FIGS. 2 and 3, the shoji 20 shown in the present embodiment is a sliding type shoji composed of a plurality of glasses including two glasses 22, 22 on the indoor side and the outdoor side, and a spacer 23 sandwiched between these glasses 22, 22 within a frame 21 extending over the entire circumference, and has excellent heat insulation properties. The shoji 20 is configured to rotate by operating a lever 24 attached to the indoor side, open toward the outdoor side, and close toward the indoor side.

[0012] The screen door 30 is housed in a groove portion 11 provided on the entire circumference of the window frame 10. As shown in FIG. 3, the screen door 30 has a net portion 31 that can be folded in the left - right direction, and in a state where the net portion 31 is folded, it is housed on one vertical frame 300 side. This screen door 30 is configured to be extended to the indoor side of the shoji 20 by sliding a vertical frame portion 32 attached to the end of the net portion 31 toward the vertical frame 400 side, and to be folded by sliding the vertical frame portion 32 toward the vertical frame 300 side. FIG. 3 shows a state where the screen door 30 is folded toward the vertical frame 300 side, and a state where the screen door 30 is extended is indicated by a dashed - dotted line.

[0013] Next, the window frame 10 will be described. <A. Upper frame> First, the upper frame 100 will be described. As shown in FIGS. 2 and 4, the upper frame 100 is composed of an existing upper frame 110, a newly installed upper frame 120, and an upper frame base material 130.

[0014] a1. Existing upper frame The existing upper frame 110 consists of a metal frame and is attached to the outdoor side of the upper part of the opening 2 of the building. The existing upper frame 110 has an outdoor side wall portion 111 that extends downward at its outdoor end. As shown in Figure 4, the outdoor side wall portion 111 is the base portion of the existing side wall portion 111a (shown as a dashed line in Figure 4) that was originally provided on the existing upper frame 110 before it was remodeled into the remodeled sash 1, and was cut off. The lower end of the outdoor side wall portion 111 is located above the position of the inner circumferential surface 3a of the frame member 3.

[0015] Furthermore, the existing upper frame 110 has an integral angle portion 112 at its indoor end that extends outwards toward the indoor side. The angle portion 112 is fixed to the outdoor end of the inner circumferential surface 3a of the frame member 3.

[0016] The existing upper frame 110 further has a protruding piece 113. The protruding piece 113 protrudes from the outdoor end of the angle portion 112 toward the inside of the opening 2 (the lower side in Figures 2 and 4). This protruding piece 113 is the remaining part of the protruding piece, which was left over when the existing protruding piece 113a (shown by a dashed line in Figure 4), which was originally provided on the existing vertical frames 310 and 410 before they were converted to the remodeled sash 1, was cut off. The protruding piece 113 protrudes toward the inside of the opening 2 beyond the inner circumferential surface 3a of the frame member 3. In this embodiment, the protruding piece 113 protrudes toward the inside (downward) of the inner circumferential surface 3a of the frame member 3 by about 5 mm.

[0017] a2. New upper frame The newly installed upper frame 120 is attached to the inner circumference of the existing upper frame 110 with the upper frame base material 130 in between. The newly installed upper frame 120 is mainly made of a metal frame and has an overhang 121 that extends further outward than the shoji screen 20. The overhang 121 slopes slightly downward toward the outside and has an outdoor side wall portion 122 that rises upward at its tip. The outdoor side wall portion 122 extends substantially parallel to the outdoor side wall portion 111 of the existing upper frame 110 so as to face it and is positioned to cover the entire outdoor side wall portion 111 from the outside.

[0018] The outdoor side wall portion 122 has a plurality of ribs 122a to 122c that protrude toward the indoor side. Rib 122a is located at the upper end of the outdoor side wall portion 122. Ribs 122b and 122c are located below rib 122a and protrude so as to abut against the outdoor side wall portion 132 of the upper frame base material 130, which will be described later. These ribs 122a to 122c extend parallel to each other along the entire length of the newly installed upper frame 120.

[0019] The newly installed upper frame 120 has a resin angle member 123 at its indoor end that extends outward toward the indoor side. The angle member 123 is integrally formed with the groove 11 in which the screen door 30 is housed and is positioned at a distance from the inner circumferential surface 3a of the frame member 3. A resin angle cover 124 is attached between the angle member 123 and the inner circumferential surface 3a of the frame member 3. The boundary between the angle cover 124 and the inner circumferential surface 3a of the frame member 3 is shielded by a resin L-shaped trim piece 125. The trim piece 125 is fixed to the inner circumferential surface 3a of the frame member 3 by mounting screws 125a.

[0020] The newly installed upper frame 120 is fixed to the upper frame base material 130 via a spacer member 140, by multiple mounting screws 126a and 126b that penetrate the upper frame base material 130. The mounting screws 126a and 126b penetrate from the newly installed upper frame 120 through the upper frame base material 130.

[0021] a3. Upper frame base material The upper frame base material 130 is positioned between the existing upper frame 110 and the new upper frame 120. As shown in Figure 8, only one upper frame base material 130 is attached to the inner circumference side of the existing upper frame 110, and it extends over approximately the entire length of the existing upper frame 110. The upper frame base material 130 is formed to be the same length as the entire length of the new upper frame 120, or longer than the entire length of the new upper frame 120.

[0022] Figure 9 shows the details of the upper frame base material 130. Figure 9 is a perspective view of the upper frame base material 130. The upper frame base material 130 is made of metal and integrally comprises a base material body 131, an outdoor side wall portion 132, and a plurality of protruding legs 133a to 133d.

[0023] The base material body 131 consists of a long, plate-like member that extends along the extension direction of the upper frame 100, and covers the inner circumference of the existing upper frame 110 over substantially its entire length and in both indoor and outdoor directions, thereby forming a substantially flat mounting surface for the new upper frame 120. The indoor end of the base material body 131 is positioned on the inner circumferential surface 3a of the frame member 3 so as to cover the angle portion 112 of the existing upper frame 110. In this embodiment, the surface of the angle portion 112 of the existing upper frame 110 and the inner circumferential surface 3a of the frame member 3 are the mounting surfaces for the indoor end of the upper frame base material 130.

[0024] The outdoor side wall portion 132 extends upward from the outdoor end of the base material body 131. The outdoor side wall portion 132 extends substantially parallel to the outdoor side wall portion 111 of the existing upper frame 110, and is positioned between the outdoor side wall portion 122 of the new upper frame 120 and the outdoor side wall portion 111 of the existing upper frame 110, covering approximately the lower half of the outdoor side wall portion 111 of the existing upper frame 110. The outdoor side wall portion 132 is positioned to abut against the ribs 122b and 122c provided on the outdoor side wall portion 122 of the new upper frame 120, but the upper end portion 132a of the outdoor side wall portion 132 is positioned below the ribs 122a.

[0025] The protruding legs 133a to 133d are provided on the back surface of the base material body 131 (the surface facing the existing upper frame 110), protruding parallel to the length direction of the base material body 131 (the extension direction of the upper frame 100) toward the existing upper frame 110. As shown in Figure 4, the pair of indoor-side protruding legs 133a and 133b of the protruding legs 133a to 133d are positioned opposite the surface of the angle portion 112 of the existing upper frame 110, which is the mounting surface, and the inner circumferential surface 3a of the frame member 3, and protrude toward this mounting surface.

[0026] The most indoor-facing protruding leg portion 133a is located at the most indoor-facing end of the base material body 131. The indoor-facing side of this protruding leg portion 133a forms the indoor side surface 130a of the upper frame base material 130. As shown in Figure 4, this indoor side surface 130a is located on the same plane as the indoor side surface 120a of the newly installed upper frame 120, excluding the angle cover 124. The angle cover 124 is attached so as to cover both the indoor side surface 130a of the upper frame base material 130 and the indoor side surface 120a of the newly installed upper frame 120.

[0027] Furthermore, the protruding legs 133a to 133d also have the function of blocking rainwater that seeps in from between the outdoor side wall portion 111 of the existing upper frame 110 and the outdoor side wall portion 132 of the upper frame base material 130, preventing it from seeping further into the interior. In particular, the protruding leg portion 133d on the outermost side functions as a first weir, blocking rainwater that seeps in from the outside.

[0028] a4. Mounting structure of the upper frame base material As shown in Figure 4, the outdoor side of the upper frame base material 130 is fixed to the outdoor side wall portion 111 of the existing upper frame 110 by the mounting member 40. The details of this mounting member 40 will be further explained with reference to Figures 10 to 12. Figure 10 is a partial perspective view of the upper frame base material 130 as seen from the back side, Figure 11 is a front view of the mounting member 40 as seen from the indoor side, and Figure 12 is a longitudinal cross-sectional view of the mounting member 40. Note that in Figure 10, the existing upper frame 110 is omitted from the illustration to facilitate understanding of the configuration.

[0029] The mounting member 40 comprises a base portion 41 attached to the back surface of the base material body 131, a mounting piece 42 attached to the outdoor side wall portion 111 of the existing upper frame 110, and a height adjustment screw 43 made of a countersunk screw rotatably held by the base portion 41. One or more of these mounting members 40 are provided depending on the length of the upper frame base material 130.

[0030] The base portion 41 is made of a flat metal plate, and a pair of support plate portions 41a, 41a are erected on its surface (the surface facing the existing upper frame 110). Each support plate portion 41a, 41a is arranged parallel to the indoor / outdoor direction and erected at a predetermined interval along the length of the upper frame base material 130. The distance between the pair of support plate portions 41a, 41a is set to be approximately the same as the length of the mounting piece 42 (length along the length of the upper frame base material 130), which will be described later.

[0031] As shown in Figure 9, the base material body 131 has multiple elongated holes 136 for screw insertion that extend in the indoor / outdoor direction. The elongated holes 136 are positioned on the outdoor side of the outermost protruding leg portion 133d. Figure 9 shows the upper frame base material 130 to which two mounting members 40 are attached, with two elongated holes 136 provided for each pair of mounting members 40. The base portion 41 is fixed to the base material body 131 by mounting screws 44 that pass through these elongated holes 136. Because the elongated holes 136 are long in the indoor / outdoor direction, the fixing position of the base portion 41 in the indoor / outdoor direction can be finely adjusted.

[0032] The mounting piece 42 is made of a metal plate that extends substantially parallel to the base material body 131. A pair of clamping pieces 42a, 42a are erected on the upper surface of the mounting piece 42 (the surface on the existing upper frame 110 side). The clamping pieces 42a, 42a extend along the length direction of the upper frame base material 130. As shown in Figure 12, the clamping pieces 42a, 42a are housed from below the outdoor side wall portion 111 of the existing upper frame 110, sandwiching the outdoor side wall portion 111 between them. The mounting piece 42 extends from below the outdoor side wall portion 111 sandwiched between the clamping pieces 42a, 42a toward the indoor side, and is positioned to be sandwiched between a pair of support plate portions 41a, 41a on the base portion 41.

[0033] A mounting screw 45 is screwed in from below through the mounting piece 42, with the outdoor side wall portion 111 sandwiched between a pair of clamping pieces 42a, 42a. Here, the distance between the clamping pieces 42a, 42a is set to be slightly narrower than the sum of the thickness of the outdoor side wall portion 111 and the outer diameter of the threaded portion of the mounting screw 45. Therefore, the outdoor side wall portion 111 between the clamping pieces 42a, 42a is sandwiched between one of the clamping pieces 42a (the outdoor clamping piece 42a in this embodiment) and the mounting screw 45. At this time, the threads of the mounting screw 45 bite into the outdoor side wall portion 111 and the clamping piece 42a respectively, so the mounting screw 45 does not easily fall out and the mounting piece 42 can be firmly fixed to the outdoor side wall portion 111.

[0034] As shown in Figure 12, double-sided tape 46 is interposed between the outdoor clamping piece 42a and the outdoor side wall 111, adhering the clamping piece 42a to the outdoor side wall 111. The double-sided tape 46 restricts the relative movement between the clamping piece 42a and the outdoor side wall 111, preventing the mounting piece 42 from sliding laterally in conjunction with the rotation of the mounting screw 45. This improves the workability when fixing the mounting piece 42 to the outdoor side wall 111.

[0035] The height adjustment screw 43 secures the mounting piece 42 to the base 41 in a height-adjustable manner. Specifically, a pair of retaining claws 41b, 41b are provided on the surface of the base 41 between a pair of support plate portions 41a, 41a to hold the head 43a of the height adjustment screw 43. The retaining claws 41b, 41b rotatably hold the head 43a of the height adjustment screw 43. With the head 43a rotatably held by the retaining claws 41b, 41b, the height adjustment screw 43 is screwed into the mounting piece 42 on the indoor side of the pair of clamping pieces 42a, 42a, thereby securing the mounting piece 42 to the base 41. This secures the outdoor end of the upper frame base material 130 to the existing upper frame 110.

[0036] Between the retaining claw portions 41b, 41b, there is an operating hole 41c with a diameter smaller than the outer diameter of the head 43a of the height adjustment screw 43. The upper surface (the surface with the screwdriver groove) of the head 43a of the height adjustment screw 43 faces into the operating hole 41c. Also, as shown in Figures 9 to 11, the base material body 131 of the upper frame base material 130 has a hole portion 137 between adjacent elongated holes 136 that is larger than the operating hole 41c. The operating hole 41c is located within this hole portion 137 of the base material body 131. Therefore, the head 43a of the height adjustment screw 43, which faces into the operating hole 41c, can be rotated using a screwdriver or the like by passing it through the hole portion 137 from the lower side of the base material body 131.

[0037] The mounting piece 42, which screws into the height adjustment screw 43, is immobile because it is sandwiched between the pair of support plate portions 41a, 41a. Therefore, when the height adjustment screw 43 rotates, the mounting piece 42 moves vertically along the axis of the height adjustment screw 43 while being sandwiched between the support plate portions 41a, 41a. This allows for height adjustment of the outdoor side of the upper frame base material 130, and enables easy fine-tuning of the horizontality of the upper frame base material 130.

[0038] Next, the indoor side of the upper frame base material 130 is fixed to the frame member 3 by mounting screws 134 that pass through the base material body 131 and the angle portion 112 of the existing upper frame 110. Of the multiple protruding legs 133a to 133d erected on the base material body 131, a pair of protruding legs 133a and 133b, which are located on the indoor side, face the surface of the angle portion 112, which is the mounting surface, and the inner circumferential surface 3a of the frame member 3. The mounting screws 134 are positioned between this pair of protruding legs 133a and 133b and are screwed into the frame member 3 by passing through the base material body 131.

[0039] Here, as shown in Figure 13, the indoor end of the upper frame base material 130 is attached by mounting screws 134, with a gap D between it and the surface of the angle portion 112, which is the mounting surface, and the inner circumferential surface 3a of the frame member 3. That is, with the upper frame base material 130 screwed to the mounting screws 134, a gap D is formed between the tips of the protruding legs 133a and 133b of the upper frame base material 130 and the surface of the angle portion 112 and the inner circumferential surface 3a of the frame member 3. This gap D is formed by setting the protruding height of the protruding legs 133a and 133b to a height of D1-D2, where D1 is the design distance between the base material body 131 of the upper frame base material 130 and the surface of the angle portion 112 and the inner circumferential surface 3a of the frame member 3, and D2 is the thickness of the waterproof tape 150 described later.

[0040] As a result, even if the mounting screws 134 are screwed in with the waterproof tape 150 placed between the upper frame base material 130, the angle portion 112, and the frame member 3, there is no risk of the indoor end of the upper frame base material 130 protruding inward (downward in Figures 4 and 13) and tilting, and it becomes possible to form the mounting surface for the new upper frame 120 in the correct position.

[0041] Furthermore, the upper frame base material 130 is attached to the inner side of the existing upper frame 110, as shown in Figure 4, by having a predetermined space S1 between the base material body 131 and the inner surface 3a of the frame member 3, with the protruding legs 133a and 133b positioned opposite the frame member 3. In this embodiment, this space S1 is set such that the distance between the base material body 131 of the upper frame base material 130 and the inner surface 3a of the frame member 3 is the same as or slightly larger than the protruding height (approximately 5 mm) of the protruding piece 113 of the existing upper frame 110. As a result, the protruding piece 113 of the existing upper frame 110 is completely housed within the space S1 and does not interfere with the upper frame base material 130.

[0042] a5. Water-stopping structure of the upper frame As shown in Figure 4, a waterproofing tape 150, which acts as a sealant, is interposed between the two protruding legs 133a and 133b on the indoor side of the upper frame base material 130 and the surface of the angle portion 112 of the existing upper frame 110 and the inner circumferential surface 3a of the frame member 3. The waterproofing tape 150 covers the protruding piece 113 of the existing upper frame 110 and is also applied to the vicinity of the trim material 125 of the new upper frame 120. The mounting screws 134 that fix the indoor side of the upper frame base material 130 pass through this waterproofing tape 150. As a result, the outer surface of the mounting screws 134 is waterproofed.

[0043] Furthermore, a waterproofing tape 151 is attached across the indoor side surface 120a of the newly installed upper frame 120 and the indoor side surface 130a of the upper frame base material 130. The waterproofing tape 151 extends from the indoor side surface 130a of the upper frame base material 130 so as to overlap with the portion of the waterproofing tape 150 that is attached to the inner circumferential surface 3a of the frame member 3. In this embodiment, the indoor side surface 130a of the upper frame base material 130 and the indoor side surface 120a of the newly installed upper frame 120 are located on the same plane. This allows the waterproofing tape 151 to be attached in a planar manner, resulting in good workability and a good attachment state, thereby improving the waterproofing function. In this embodiment, the indoor side surface 140a of the spacer member 140 is also located on the same plane as the indoor side surfaces 120a and 130a, but the position of the indoor side surface 140a of the spacer member 140 is not particularly limited.

[0044] Furthermore, as shown in Figures 4 and 10, multiple waterproofing materials 160-162 made of foamed rubber or the like are interposed between the existing upper frame 110 and the new upper frame 120. These waterproofing materials 160-162 extend in a long length along the longitudinal direction of the new upper frame 120.

[0045] The waterproofing material 160 is sandwiched between the outdoor side wall portion 111 of the existing upper frame 110 and the outdoor side wall portion 122 of the new upper frame 120, and abuts against the upper end portion 132a of the outdoor side wall portion 132 of the upper frame base material 130. Further, the waterproofing material 161 is sandwiched between the outdoor side wall portion 122 of the new upper frame 120 and the outdoor side wall portion 132 of the upper frame base material 130. Furthermore, the waterproofing material 162 is disposed on the indoor side of the long hole 136 and the hole portion 137 formed in the base material body 131 and on the outdoor side of the mounting screw 126b, and is sandwiched between the new upper frame 120 and the base material body 131.

[0046] <B. Lower Frame> Next, the lower frame 200 will be described. As shown in FIGS. 2 and 5, the lower frame 200 includes an existing lower frame 210, a new lower frame 220, and a lower frame base material 230.

[0047] b1. Existing lower frame The existing lower frame 210 is attached to the outdoor side of the lower side portion of the opening 2 of the building. The existing lower frame 210 has a standing wall portion 211 erected from a prospective wall portion 210a toward a new lower frame 220 disposed above. The standing wall portion 211 is continuously arranged along the length direction of the existing lower frame 210. The prospective wall portion 210a is slightly inclined downward toward the outdoor side, and the standing wall portion 211 is disposed at the outdoor side end of the prospective wall portion 210a. The standing wall portion 211 shown in the present embodiment is provided so as to protrude at approximately the same height as the inner peripheral surface 3a of the frame member 3, but is not limited thereto.

[0048] The existing lower frame 210 has an overhanging portion 212 that protrudes slightly downward toward the outdoor side from the lower part of the standing wall portion 211 on the outdoor side of the standing wall portion 211. The overhanging portion 212 protrudes toward the outdoor side from the standing wall portion 211 at a position below the connection portion 210b between the standing wall portion 211 and the prospective wall portion 210a. The outdoor side end of the overhanging portion 212 has an outdoor side wall portion 213 that extends downward. Further, the existing lower frame 210 integrally has an angle portion 214 that extends so as to protrude toward the indoor side at the indoor side end. The angle portion 214 is fixed to the outdoor side end of the inner peripheral surface 3a of the frame member 3.

[0049] b2. New lower frame The newly installed lower frame 220 is attached to the inner circumference of the existing lower frame 210 with the lower frame base material 230 in between. The newly installed lower frame 220 consists mainly of a metal frame and has an outdoor side wall portion 221 extending downward at the outdoor end. The outdoor side wall portion 221 extends approximately parallel to the outdoor side wall portion 213 of the existing lower frame 210 and is positioned to cover the entire outdoor side wall portion 213.

[0050] The newly installed lower frame 220 has a resin angle member 222 at its indoor end that extends outward toward the indoor side. The angle member 222 is integrally formed with the groove 11 in which the screen door 30 is housed and is positioned at a distance from the inner surface 3a of the frame member 3. A resin angle cover 223 is attached between the angle member 222 and the inner surface 3a of the frame member 3. The boundary between the angle cover 223 and the inner surface 3a of the frame member 3 is shielded by a resin L-shaped trim piece 224. The trim piece 224 is fixed to the inner surface 3a of the frame member 3 by mounting screws 224a.

[0051] The newly installed lower frame 220 is fixed by mounting screws 225 that pass through the lower frame base material 230. These mounting screws 225 pass through the lower frame base material 230 but do not pass through the existing lower frame 210. The mounting screws 225 are positioned on the indoor side of the vertical wall portion 211 of the existing lower frame 210.

[0052] b3. Lower frame base material The lower frame base material 230 is positioned between the existing lower frame 210 and the new lower frame 220. As shown in Figure 8, multiple lower frame base materials 230 are provided at intervals along the length of the existing lower frame 210.

[0053] Figure 14 shows the details of the lower frame base material 230. Figure 14 is a perspective view of the lower frame base material 230. The lower frame base material 230 is made of metal and integrally comprises a base material body 231, an outdoor side wall portion 232, a protruding step portion 233, a connecting portion 234, and a plurality of protruding legs 235a to 235c.

[0054] The base material body 231 is made of a plate-like member that is sufficiently short in length along the extension direction of the lower frame 200, and covers the inner circumference of the existing lower frame 210 in both the indoor and outdoor directions, thereby forming a substantially flat mounting surface for the new lower frame 220. The indoor end of the base material body 231 is positioned on the inner circumferential surface 3a of the frame member 3 so as to cover the angle portion 214 of the existing lower frame 210. In this embodiment, the surface of the angle portion 214 of the existing lower frame 210 and the inner circumferential surface 3a of the frame member 3 are the mounting surfaces for the indoor end of the lower frame base material 230.

[0055] The outdoor side wall portion 232 extends downward from the outdoor end of the base material body 231. The outdoor side wall portion 232 extends approximately parallel to the outdoor side wall portion 213 of the existing lower frame 210, and is positioned between the outdoor side wall portion 221 of the new lower frame 220 and the outdoor side wall portion 213 of the existing lower frame 210, with a length approximately the same as that of the outdoor side wall portion 221 of the new lower frame 220.

[0056] The protruding step portion 233 is positioned at the connection point between the base material body 231 and the outdoor side wall portion 232, and is integrally formed from the base material body 231 to the outdoor side wall portion 232 so as to partially bend and protrude outward from the outdoor side wall portion 232.

[0057] As shown in Figure 5, the outdoor side wall portion 221 of the newly installed lower frame 220 abuts against the protruding step portion 233 from the outdoor side. Therefore, the outdoor side wall portion 221 of the newly installed lower frame 220 is located further outdoors than the outdoor side wall portion 232 of the lower frame base material 230 by the amount of the protrusion of the protruding step portion 233. This amount of the protruding step portion 233 toward the outdoor side corresponds to the amount by which the outdoor side wall portion 122 of the newly installed upper frame 120 is positioned to protrude toward the outdoor side, as shown in Figure 4, due to the presence of ribs 122b and 122c provided on the outdoor side wall portion 122 of the newly installed upper frame 120, the outdoor side wall portion 132 of the upper frame base material 130, and the clamping piece 42a of the mounting piece 42 of the mounting member 40. Therefore, by bringing the outdoor side wall portion 221 of the newly installed lower frame 220 into contact with the protruding step portion 233, the outdoor side wall portion 122 of the newly installed upper frame 120 and the outdoor side wall portion 221 of the newly installed lower frame 220 can be aligned on the same plane.

[0058] Furthermore, the outdoor side wall portion 221 of the newly installed lower frame 220 is aligned to be on the same plane as the first outdoor side wall portions 321a and 421a of the newly installed vertical frames 320 and 420, which will be described later. As a result, the visible surface of the renovated sash 1 (the surface of the outdoor side wall portions 122, 221, 321a, and 421a) is aligned to be on the same plane all around, resulting in a good appearance of the renovated sash 1 from the outside.

[0059] The connecting portion 234 is a part that connects the outdoor upper surface portion 231A, which is located on the outdoor side of the base material body 231, and the indoor upper surface portion 231B, which is located on the indoor side of the base material body 231. It is provided along the length of the base material body 231 at a position on the indoor side of the mounting screws 225 of the newly installed lower frame 220.

[0060] The outdoor upper surface portion 231A and the indoor upper surface portion 231B constitute the upper surface of the lower frame base material 230. The outdoor upper surface portion 231A and the indoor upper surface portion 231B have different heights toward the upper frame 100, with the connecting portion 234 as the boundary. That is, with the base material body 231, the indoor upper surface portion 231B is higher toward the upper frame 100 than the outdoor upper surface portion 231A, with the connecting portion 234 as the boundary, and the upper surface of the lower frame base material 230 has a stepped shape at the connecting portion 234. Therefore, even if rainwater seeps in from the outdoor side between the newly installed lower frame 220 and the lower frame base material 230, it will not seep in beyond the connecting portion 234 into the indoor side. Therefore, with this lower frame base material 230, it is possible to contain the infiltrating rainwater within the outdoor upper surface portion 231A of the base material body 231, and prevent rainwater from entering the indoor upper surface portion 231B.

[0061] In this embodiment, the connecting portion 234 is composed of an inclined surface that slopes downward from the indoor upper surface portion 231B toward the outdoor upper surface portion 231A. However, the connecting portion 234 is not limited to an inclined surface and may be a substantially vertical wall surface.

[0062] The protruding legs 235a to 235c are provided on the back surface (the surface on the existing lower frame 210 side) of the indoor upper surface 231B of the base material body 231, protruding toward the existing lower frame 210 and extending parallel to the length of the base material body 231. As shown in Figure 5, the protruding legs 235a to 235c are positioned opposite the surface of the angle portion 214 of the existing lower frame 210, which is the mounting surface, and the inner circumferential surface 3a of the frame member 3, and protrude toward this mounting surface.

[0063] The innermost protruding leg portion 235a is located at the indoor end of the base material body 231. The indoor side of this protruding leg portion 235a forms the indoor side surface 230a of the lower frame base material 230. As shown in Figure 5, this indoor side surface 230a is located on the same plane as the indoor side surface 220a of the newly installed lower frame 220, excluding the angle cover 223. The angle cover 223 is attached so as to cover both the indoor side surface 230a of the lower frame base material 230 and the indoor side surface 220a of the newly installed lower frame 220.

[0064] b4. Mounting structure of the lower frame base material As shown in Figures 2 and 5, the outdoor side of the lower frame base material 230 is placed on the overhang portion 212 of the existing lower frame 210 via a height adjustment mechanism 50. The details of this height adjustment mechanism 50 will be further explained with reference to Figures 14 and 15. Figure 14 is a cross-sectional view of the height adjustment mechanism 50 seen from the front, and Figure 15 is a cross-sectional view of the height adjustment mechanism 50 seen from the side.

[0065] The height adjustment mechanism 50 comprises a base 51 attached to the back surface of the base material body 231, a height adjustment screw 52 made of a countersunk screw rotatably held by the base 51, and a support leg 53 that screws onto the height adjustment screw 52.

[0066] The base portion 51 has a contact portion 51a that abuts against the back surface of the base material body 231, and a pair of side wall portions 51b, 51b that hang downward from both ends of the contact portion 51a on the indoor and outdoor sides. The contact portion 51a and the side wall portions 51b, 51b extend along the length direction of the lower frame base material 230.

[0067] A height adjustment screw 52 is housed between the side wall portions 51b, 51b. Specifically, retaining steps 51c, 51c are formed on the inner surfaces of the side wall portions 51b, 51b, respectively, conforming to the cross-sectional shape of the head 52a of the height adjustment screw 52. The head 52a of the height adjustment screw 52 is inserted from the side of the base portion 51 between the contact portion 51a and the pair of retaining steps 51c, 51c, and is rotatably held between the contact portion 51a and the retaining steps 51c, 51c.

[0068] As shown in Figure 13, the base material body 231 of the lower frame base material 230 has two elongated holes 237 for screw insertion that extend in the indoor / outdoor direction. As shown in Figure 14, the base portion 51 is fixed to the base material body 231 by two mounting screws 54 that pass through these elongated holes 237. Because the elongated holes 237 are long in the indoor / outdoor direction, the fixing position of the base portion 51 in the indoor / outdoor direction can be finely adjusted.

[0069] A through hole 51d is formed in the contact portion 51a, with a diameter smaller than the outer diameter of the head 52a of the height adjustment screw 52. The upper surface (the surface with the screwdriver groove) of the head 52a of the height adjustment screw 52 faces into the through hole 51d. Also, as shown in Figures 13 to 15, the base material body 231 of the lower frame base material 230 has an elongated hole 238 formed similarly to the elongated holes 237 between adjacent elongated holes 237. The through hole 51d is positioned to face the inside of this elongated hole 238.

[0070] The support leg 53 has a threaded portion 53a that screws onto the height adjustment screw 52, ​​and a pair of L-shaped legs 53b, 53b that extend downward from the threaded portion 53a, sandwiching the height adjustment screw 52. The legs 53b, 53b are placed on the overhang 212 of the existing lower frame 210. The thickness of the support leg 53 in the indoor / outdoor direction is approximately the same as the distance between the pair of side wall portions 51b, 52b of the base 51. Therefore, as shown in Figure 15, when the threaded portion 53a is screwed onto the height adjustment screw 52, ​​the support leg 53 is supported from both the indoor and outdoor directions by surface contact with the pair of side wall portions 51b, 51b.

[0071] Height adjustment by the height adjustment mechanism 50 is performed by rotating the head 52a of the height adjustment screw 52, ​​which faces into the through hole 51d, through the elongated hole 238 from the upper side of the lower frame base material 230 using a screwdriver or the like. Since the support leg 53 is sandwiched between the pair of side wall portions 51b, 51b and cannot rotate, when the head 52a of the height adjustment screw 52 is rotated, the support leg 53 moves vertically along the axis of the height adjustment screw 52 between the side wall portions 51b, 51b. As a result, the height of the outdoor side of the lower frame base material 230 is adjusted, making it easy to fine-tune the horizontality of the lower frame base material 230.

[0072] At this time, the support legs 53 of the height adjustment mechanism 50 abut against the downward-sloping overhang 212, but since they are supported by a pair of side walls 51b, 51b, there is no risk of tilting. Therefore, the height adjustment mechanism 50 can stably support the outdoor side of the lower frame base material 230 in a height-adjustable manner.

[0073] Furthermore, the pair of legs 53b, 53b of the support leg 53 are formed in an L shape and have a shape that extends to the left and right along the length direction (left-right direction in Figure 14) of the lower frame base material 230, so that a large contact area with the protruding portion 212 of the existing lower frame 210 can be secured. For this reason, the height adjustment mechanism 50 can stably receive the load applied to the lower frame base material 230.

[0074] Next, the indoor side of the lower frame base material 230 is fixed to the frame member 3 by mounting screws 236 that pass through the base material body 231. These protruding legs 235a to 235c face the inner circumferential surface 3a of the frame member 3. The mounting screws 236 are positioned between a pair of these protruding legs 235b and 235c and are screwed into the frame member 3 by passing through the base material body 231.

[0075] Next, the indoor side of the upper frame base material 130 is fixed to the frame member 3 by mounting screws 134 that pass through the base material body 131 and the angle portion 112 of the existing upper frame 110. Of the multiple protruding legs 133a to 133d erected on the base material body 131, a pair of protruding legs 133a and 133b, which are located on the indoor side, face the surface of the angle portion 112, which is the mounting surface, and the inner circumferential surface 3a of the frame member 3. The mounting screws 134 are positioned between this pair of protruding legs 133a and 133b and are screwed into the frame member 3 by passing through the base material body 131.

[0076] Here, as shown in Figure 15, the indoor end of the lower frame base material 230 is attached by mounting screws 236, with a gap D between it and the surface of the angle portion 214 and the inner circumferential surface 3a of the frame member 3. That is, with the lower frame base material 230 screwed to the mounting screws 236, a gap D is formed between the tips of the protruding legs 235a, 235b, and 235c of the lower frame base material 230 and the surface of the angle portion 214 and the inner circumferential surface 3a of the frame member 3. This gap D is formed by setting the protruding height of the protruding legs 235a, 235b, and 235c to a height of D1-D2, where D1 is the design distance between the base material body 231 of the lower frame base material 230 and the surface of the angle portion 214 and the inner circumferential surface 3a of the frame member 3, and D2 is the thickness of the waterproof tape 240 described later.

[0077] As a result, even if the mounting screws 236 are screwed in with the waterproof tape 240 placed between the lower frame base material 230, the angle portion 214, and the frame member 3, there is no risk of the indoor end of the lower frame base material 230 protruding inward (upward in Figures 5 and 15) and tilting, and it becomes possible to form the mounting surface for the new lower frame 220 in the correct position.

[0078] b5. Water-stopping structure of the lower frame As shown in Figure 5, a waterproofing tape 240, which acts as a sealant, is interposed between the protruding legs 235a to 235c of the lower frame base material 230 and the inner circumferential surface 3a of the frame member 3 (the surface of the angle portion 214 of the existing lower frame 210). The waterproofing tape 240 is applied between the protruding legs 235a to 235c and the inner circumferential surface 3a of the frame member 3, extending near the trim material 224 of the new lower frame 220. The mounting screws 236 that fix the indoor side of the lower frame base material 230 pass through this waterproofing tape 240. As a result, the outer surface of the mounting screws 236 is waterproofed.

[0079] In addition, a water stop tape 241 is adhered across the indoor side surface 220a of the newly installed lower frame 220 and the indoor side surface 230a of the lower frame base material 230. The water stop tape 241 extends from the indoor side surface 230a of the lower frame base material 230 across the portion adhered to the inner peripheral surface 3a of the frame member 3 of the water stop tape 240. In the present embodiment, the indoor side surface 230a of the lower frame base material 230 and the indoor side surface 220a of the newly installed lower frame 220 are arranged on the same plane. Thereby, since the water stop tape 241 can be adhered flatly, the adhesion workability is good, the adhesion state is also good, and the water stop function can be improved.

[0080] <C. Vertical Frame> Next, the vertical frames 300 and 400 will be described. As shown in FIGS. 3, 6, and 7, the vertical frames 300 and 400 are configured to include existing vertical frames 310 and 410, newly installed vertical frames 320 and 420, and vertical frame base materials 330 and 430.

[0081] c1. Existing vertical frame The existing vertical frames 310 and 410 are respectively attached to the left and right vertical side portions on the outdoor side of the opening 2 of the building. The existing vertical frames 310 and 410 have outdoor side wall portions 311 and 411 that extend outward to the left and right at the outdoor side ends, and integrally have angle portions 312 and 412 that extend so as to protrude inward on the indoor side at the indoor side ends. The angle portions 312 and 412 are fixed to the outdoor side ends of the inner peripheral surface 3a of the frame member 3.

[0082] The inner peripheral surfaces 310a and 410a of the existing vertical frames 310 and 410 are arranged flush with the inner peripheral surfaces 3a of the left and right frame members 3, respectively.

[0083] The existing vertical frames 310 and 410 have a plurality (three in the present embodiment) of protruding pieces 313 and 413 that protrude from the inner peripheral surfaces 310a and 410a toward the inside of the opening 2 (the central side in FIG. 3, the right side in FIG. 6, and the left side in FIG. 7). The protruding pieces 313 and 413 extend parallel to each other along the length direction of the existing vertical frames 310 and 410.

[0084] The protruding pieces 313 and 413 are the remaining protruding pieces, consisting of the root portions of the existing protruding pieces 313a and 413a (shown as dashed lines in Figures 6 and 7), which were originally provided on the existing vertical frames 310 and 410 before they were converted to the remodeled sash 1, and were cut off. Each of the protruding pieces 313 and 413 is at approximately the same height and protrudes further inward into the opening 2 than the inner circumferential surface 3a of the frame member 3. In this embodiment, the protruding pieces 313 and 413 protrude by about 5 mm from the inner circumferential surface 3a of the frame member 3.

[0085] c2. New vertical frame The newly installed vertical frames 320 and 420 are attached to the inner circumference of the existing vertical frames 310 and 410 with the vertical frame base materials 330 and 430 in between. The newly installed vertical frames 320 and 420 consist mainly of a metal frame and have first outdoor side wall sections 321a and 421a integrally at the outdoor end, extending outwards to the left and right, and further have second outdoor side wall sections 321b and 421b integrally at the ends of the first outdoor side wall sections 321a and 421a, extending inwards towards the indoor side.

[0086] The first outdoor side wall sections 321a and 421a extend substantially parallel to the outdoor side wall sections 311 and 411 of the existing vertical frames 310 and 410, and are positioned to cover and conceal the entire outdoor side wall sections 311 and 411. The second outdoor side wall sections 321b and 421b are positioned to cover and conceal the outdoor side wall sections 311 and 411 of the existing vertical frames 310 and 410 from the left and right outer sides.

[0087] The newly installed vertical frames 320 and 420 have resin angle members 322 and 422 at their indoor ends that extend outwards toward the indoor side. The angle members 322 and 422 are integrally formed with the groove 11 in which the screen door 30 is housed and are positioned at a distance from the inner surface 3a of the frame member 3. Resin angle covers 323 and 423 are attached between these angle members 322 and 422 and the inner surface 3a of the frame member 3. The boundary between the angle covers 323 and 423 and the inner surface 3a of the frame member 3 is shielded by resin L-shaped trim pieces 324 and 424. The trim pieces 324 and 424 are fixed to the inner surface 3a of the frame member 3 by mounting screws 324a and 424a.

[0088] The newly installed vertical frames 320 and 420 are fixed to the vertical frame base materials 330 and 430 via spacer members 325 and 425, and by mounting screws 326a, 326b, 426a, and 426b. The mounting screws 326a and 426a pass through the central part of the vertical frame base materials 330 and 430 and are screwed into the existing vertical frames 310 and 410. The mounting screws 326b and 426b pass through the bottom of the groove 11 and near the indoor end of the vertical frame base materials 330 and 430.

[0089] c3. Vertical frame base material The vertical frame base members 330 and 430 are positioned between the existing vertical frames 310 and 410 and the new vertical frames 320 and 420. As shown in Figure 8, multiple vertical frame base members 330 and 430 are provided at intervals along the length of the existing vertical frames 310 and 410. The vertical frame base members 330 and 430 have the same configuration.

[0090] Details of the vertical frame base members 330 and 430 are shown in Figure 16. Figure 16 is a perspective view of the back side of the vertical frame base members 330 and 430 as seen from the outside. The vertical frame base members 330 and 430 are made of metal and integrally consist of the base member body 331 and 431, the outdoor side wall portions 332 and 432, and the protruding leg portions 333 and 433.

[0091] The base material bodies 331 and 431 consist of plate-like members that are sufficiently shorter than the length of the existing vertical frames 310 and 410 in the longitudinal direction, and by covering the inner circumference of the existing vertical frames 310 and 410 in both the indoor and outdoor directions, they form a substantially flat mounting surface for the new vertical frames 320 and 420.

[0092] As shown in Figure 8, multiple vertical frame base members 330 and 430 are provided at intervals along the length of the existing vertical frames 310 and 410. The indoor-side ends of the base member bodies 331 and 431 are positioned on the inner circumferential surface 3a of the frame member 3 so as to cover the angle portions 312 and 412 of the existing vertical frames 310 and 410. In this embodiment, the surfaces of the angle portions 312 and 412 of the existing vertical frames 310 and 410 and the inner circumferential surface 3a of the frame member 3 are used as the mounting surfaces for the indoor-side ends of the vertical frame base members 330 and 430.

[0093] As shown in Figures 6 and 7, the outdoor side wall portions 332 and 432 extend outward from the outdoor ends of the base material bodies 331 and 431. The outdoor side wall portions 332 and 432 extend approximately parallel to the outdoor side wall portions 311 and 411 of the existing vertical frames 310 and 410, and are positioned in contact with the outdoor side wall portions 311 and 411 between the first outdoor side wall portions 321a and 421a of the new vertical frames 320 and 420 and the outdoor side wall portions 311 and 411 of the existing vertical frames 310 and 410.

[0094] The protruding legs 333 and 433 are integrally formed at the indoor-side ends of the base material bodies 331 and 431. As shown in Figures 6 and 7, the protruding legs 333 and 433 cover the angle portions 312 and 412 and are positioned opposite the inner circumferential surface 3a of the frame member 3, protruding from the back surface of the base material bodies 331 and 431 (the side facing the existing vertical frames 310 and 410) toward the inner circumferential surface 3a of the frame member 3.

[0095] The protruding legs 333 and 433 are located at the innermost indoor ends of the vertical frame base materials 330 and 430. The indoor sides of these protruding legs 333 and 433 form the indoor sides 330a and 430a of the vertical frame base materials 330 and 430. As shown in Figures 6 and 7, these indoor sides 330a and 430a are located on the same plane as the indoor sides 320a and 420a of the newly installed vertical frames 320 and 420, excluding the angle covers 323 and 423. The angle covers 323 and 423 are fitted so as to cover the indoor sides 330a and 430a of the vertical frame base materials 330 and 430 and the indoor sides 320a and 420a of the newly installed vertical frames 320 and 420.

[0096] c4. Mounting structure of vertical frame base material The vertical frame base members 330 and 430 are attached to the existing vertical frames 310 and 410 by a pair of mounting stays 334 and 434 on the back of the base member body 331. Each mounting stay 334 and 434 is formed in a strip shape extending along the length of the vertical frame base members 330 and 430, and is attached to the base member body 331 and 431 by mounting screws 337 and 437 into elongated holes 335, 435, 336, and 436 that are long in the indoor and outdoor directions. Since the mounting stays 334 and 434 are attached using the elongated holes 335, 435, 336, and 436, the mounting position of the mounting stays 334 and 434 in the indoor and outdoor directions can be finely adjusted.

[0097] Each mounting stay 334, 434 has bent portions 334b, 434b at both ends beyond the fixing points with the mounting screws 337, 437, which bend toward the existing vertical frames 310, 410. As a result, both ends 334a, 434a of the mounting stays 334, 434 protrude toward the existing vertical frames 310, 410 from the base material bodies 331, 431. At both ends 334a, 434a, the mounting stays 334, 434 are fixed to the inner circumferential surfaces 310a, 410a of the existing vertical frames 310, 410, avoiding the protruding pieces 313, 413, respectively, by mounting screws 338, 438. As a result, the vertical frame base materials 330, 430 are attached to the inner circumferential side of the existing vertical frames 310, 410.

[0098] Here, Figure 19 shows the mounting structure of the indoor end of the vertical frame base members 330 and 430. Figure 19 shows one of the vertical frame base members 330, but the other vertical frame base member 430 has the same configuration, so the other vertical frame base member 430 will be indicated by a reference numeral in parentheses in the explanation referring to Figure 19. The indoor ends of the vertical frame base members 330 and 430 are attached with a gap D between them and the inner circumferential surface 3a of the frame member 3, which is the surface to be attached. That is, when the vertical frame base members 330 (430) are attached by the mounting stays 334 and 434, a gap D is formed between the tip of the protruding leg portion 333 (433) of the vertical frame base member 330 (430) and the inner circumferential surface 3a of the frame member 3. This gap D is formed by setting the protruding height of the protruding leg portion 333 (433) to a height of D1-D2, where D1 is the design distance between the base body 331 (431) of the vertical frame base member 330 (430) and the inner circumferential surface 3a of the frame member 3, and D2 is the thickness of the waterproof tape 340 (440) described later.

[0099] As a result, even if the vertical frame base materials 330 and 430 are installed with the waterproofing tape 340 and 440 placed between them and the frame member 3, there is no risk of the indoor end of the vertical frame base materials 330 and 430 protruding inward (to the right in Figures 6 and 19, and to the left in Figure 7) and tilting, and it becomes possible to form the mounting surface for the newly installed vertical frames 320 and 420 in the correct position.

[0100] c5. Water-stopping structure of the vertical frame As shown in Figures 6 and 7, waterproof tapes 340 and 440, which act as sealants, are interposed between the protruding legs 333 and 433 of the vertical frame base materials 330 and 430 and the inner circumferential surface 3a of the frame member 3 (the surface of the angle portions 312 and 412 of the existing vertical frames 310 and 410). The waterproof tapes 340 and 440 are applied from the protruding pieces 313 and 413 of the existing vertical frames 310 and 410 to the vicinity of the trim materials 324 and 424.

[0101] Furthermore, waterproof tapes 341, 441 are attached to the indoor sides 320a, 420a of the newly installed vertical frames 320, 420 and the indoor sides 330a, 430a of the vertical frame base materials 330, 430. The waterproof tapes 341, 441 extend from the indoor sides 330a, 430a of the vertical frame base materials 330, 430 to the portion of the waterproof tapes 340, 440 that is attached to the inner circumferential surface 3a of the frame member 3. In this embodiment, the indoor sides 330a, 430a of the vertical frame base materials 330, 430 and the indoor sides 320a, 420a of the newly installed vertical frames 320, 420 are arranged on the same plane. As a result, the waterproof tapes 341, 441 can be attached planarly, which improves the ease of attachment and the adhesion condition, thereby improving the waterproofing function. In this embodiment, the indoor sides 325a and 425a of the spacer members 325 and 425 are also arranged on the same plane as the indoor sides 320a, 420a, 330a, and 430a, but the positions of the indoor sides 325a and 425a of the spacer members 325 and 425 are not particularly limited.

[0102] Furthermore, waterproofing materials 350 and 450, made of foamed rubber or the like, are interposed between the existing vertical frames 310 and 410 and the newly installed vertical frames 320 and 420. The waterproofing materials 350 and 450 are sandwiched between the outdoor side wall portions 311 and 411 of the existing vertical frames 310 and 410 and the first outdoor side wall portions 321a and 421a of the newly installed vertical frames 320 and 420, and extend in a long length along the longitudinal direction of the newly installed vertical frames 320 and 420.

[0103] The window frame 10, having the above configuration, is framed in a rectangular shape by the upper frame 100, the lower frame 200, and the left and right vertical frames 300 and 400. As a result, the new frame of the remodeled sash 1 (new upper frame 120, new lower frame 220, and new vertical frames 320 and 420) is attached via the base materials 130, 230, 330 and 430 to cover the inner circumference of the existing frame (existing upper frame 110, existing lower frame 210, and existing vertical frames 310 and 410). [Explanation of Symbols]

[0104] 1 Renovation sash, 2 Opening, 3 Frame member, 3a Inner surface, 110 Existing upper frame (existing frame), 120 New vertical frame (new frame), 130 Upper frame base material, 210 Existing lower frame (existing frame), 220 New lower frame (new frame), 230 Lower frame base material, 310, 410 Existing vertical frame (existing frame), 320, 420 New vertical frame (new frame), 330, 430 Vertical frame base material, 112, 214, 312, 412 Angle section, 133a, 133b, 235b, 235c, 333, 433 Protruding leg section, 150, 240, 340, 440 Water-stopping tape (sealant), D Gap

Claims

1. A remodeled sash comprising a new frame positioned on the inner circumference of an existing frame remaining in the opening of a building, and a base material positioned between the existing frame and the new frame, The indoor end of the base material is fixed to the mounting surface with screws, with a sealing material between it and the mounting surface. An angle cover is placed on the indoor side of the base material. The newly constructed frame has an angle section, The angle portion is a remodeled sash positioned on the inner circumference side of the angle cover.

2. The angle cover is positioned on the inner circumference side of the frame member. The remodeled sash according to claim 1, wherein a trim piece is placed between the angle cover and the frame member.

3. The remodeled sash according to claim 1, wherein the angle cover is made of resin.

4. The aforementioned angle portion is made of resin, as described in claim 1.

5. The angle cover has a hole opening in the longitudinal direction, as described in claim 1 or 3.

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