sash

Abstract

To provide a frame unit that can reduce the work load of attaching another sash to an existing frame and a method of constructing a frame unit.SOLUTION: A frame unit (100) includes a new frame (3) attached to the existing frame for sash fixed to the opening of the building and an auxiliary member (2) arranged between the new frame and the existing frame, which is configured to be movable in the in-plane direction of the opening with respect to the existing frame and to be locked to the existing frame and which can adjust the position of the new frame with respect to the existing frame by being joined to the existing frame at an arbitrary position. The new frame is fixed to the auxiliary member and can move together with the auxiliary member locked to the existing frame.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a frame unit and a method for constructing the frame unit. [Background technology]

[0002] There are cases where an existing sash attached to an opening in a building is replaced with a different sash. In this case, the existing frame attached to the opening in the building is not removed, and a new sash is installed. However, there are cases where the specifications of the new sash do not correspond to those of the existing frame. In this case, a new frame is installed on the existing frame. For example, Patent Document 1 discloses a remodeled sash and a method of installing the remodeled sash in which a new frame, which has rectangular frames on the top, bottom, left, and right sides, is inserted into the existing frame of the existing sash and temporarily held in place by the existing frame, and then the new frame is fixed in place with screws. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-12404 Summary of the Invention [Problem to be solved by the invention]

[0004] In order to install a frame that corresponds to the dimensions of the new sash, a certain clearance is required between the new frame and the existing frame when attaching the new frame to the existing frame. To achieve this certain clearance, adjustment spacers are placed between the new frame and the existing frame when installing the new frame. When temporarily holding the position of the new frame, the longitudinal middle portion of the frame member that constitutes the new frame may bend. Therefore, at the construction site, the new frame is attached while increasing or decreasing the number of adjustment spacers depending on the gap between the existing frame and the new frame, which requires time and effort at the construction site. The renovated sash of Patent Document 1 requires work using spacers at the construction site to position the new frame relative to the existing frame, which requires time and effort during construction. When using positioning spacers to position the new frame relative to the existing frame, fine adjustments using the positioning spacers can be difficult, and there is a need for more efficient fine-tuning work.

[0005] In light of the above circumstances, the present disclosure aims to provide a frame unit and a frame unit construction method that can reduce the workload involved in attaching another sash to an existing frame. [Means for solving the problem]

[0006] The frame unit of the present disclosure comprises a new frame attached to an existing frame for a sash fixed to an opening in a building, and an auxiliary member arranged between the new frame and the existing frame, configured to be movable in the in-plane direction of the opening relative to the existing frame and to be engageable with the existing frame, and joined to the existing frame at any position to adjust the position of the new frame relative to the existing frame, and the new frame is fixed to the auxiliary member and can move together with the auxiliary member engaged with the existing frame. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a longitudinal cross-sectional view of a frame unit according to the first embodiment. [Figure 2] A vertical cross-sectional view showing the construction method of the frame unit. [Figure 3] A vertical cross-sectional view showing the construction method of the frame unit. [Figure 4]A vertical cross-sectional view showing the construction method of the frame unit. [Figure 5] FIG. 2 is a longitudinal cross-sectional view of a frame unit according to the first embodiment. [Figure 6] FIG. 2 is a horizontal cross-sectional view of a frame unit according to the first embodiment. [Figure 7] Horizontal cross-sectional view showing the construction method of the frame unit. [Figure 8] Horizontal cross-sectional view showing the construction method of the frame unit. [Figure 9] Horizontal cross-sectional view showing the construction method of the frame unit. [Figure 10] FIG. 4 is a vertical cross-sectional view of the lower part of the frame unit according to the first embodiment. [Figure 11] 10 is a flowchart showing a method for constructing a frame unit. [Figure 12] FIG. 10 is a longitudinal cross-sectional view of a frame unit according to a modified example. [Figure 13] FIG. 10 is a horizontal cross-sectional view of a modified frame unit. [Figure 14] FIG. 10 is a longitudinal cross-sectional view of a frame unit according to a second embodiment. [Figure 15] FIG. 10 is a horizontal cross-sectional view of a frame unit according to a second embodiment. [Figure 16] A flowchart showing a frame unit construction method according to the second embodiment. [Figure 17] FIG. 10 is a longitudinal cross-sectional view of a frame unit according to a modified example. [Figure 18] FIG. 10 is a horizontal cross-sectional view of a modified frame unit. DETAILED DESCRIPTION OF THE INVENTION

[0008] (First embodiment) A frame unit 100 according to a first embodiment will be described below with reference to the drawings. In the drawings, identical or similar parts are given the same reference numerals, and duplicate explanations may be omitted. The frame unit 100 is installed in an opening O of a building. The frame unit 100 is used to install another shoji screen 300 in an existing frame 200 that has been pre-fixed to the opening O of the building. The frame unit 100 comprises a new frame 3 and an auxiliary member 2. In the frame unit 100, the new frame 3 is fixed to the existing frame 200 via the auxiliary member 2. Once the frame unit 100 is attached to the existing frame 200, a new shoji screen 300 can be slidably attached within the frame unit 100.

[0009] In the following explanation, the direction in which the shoji screen 300 of the frame unit 100 moves to open and close, and the direction in which the upper frame 31 and lower frame 32 of the new frame 3 described later extend, will be referred to as the front direction X. The front direction X may also be referred to as the width direction or horizontal direction. The direction perpendicular to the front direction X and extending inward and outward from the opening O of the building will be referred to as the front direction Z. The front direction Z may also be referred to as the depth direction. The in-plane direction is the direction along the front direction X and the vertical direction of the opening O of the building. The state in which the shoji screen 300 blocks the opening O of the building will be referred to as the fully closed state.

[0010] As shown in FIG. 1 or 6, the existing frame 200 comprises an existing upper frame 210, an existing lower frame 220, and a pair of existing vertical frames 230. The pair of existing vertical frames 230 are fixed to the side surface 403 of an opening O of a building. The existing upper frame 210 is fixed to the upper surface 401 of the opening O of the building. The existing lower frame 220 is fixed to the lower surface 402 of the opening O of the building. The existing upper frame 210 is connected to the upper end of the existing vertical frame 230, and the existing lower frame 220 is connected to the lower end of the existing vertical frame 230. The existing upper frame 210 and the existing lower frame 220 constitute an existing horizontal frame.

[0011] Figures 2 to 5 are vertical cross-sectional views showing each step of the construction method for frame unit 100, showing the upper part of frame unit 100. Figures 7 to 10 are horizontal cross-sectional views showing each step of the construction method for frame unit 100, showing one side surface 403 of opening O. The pair of vertical frames of frame unit 100 have the same configuration and are arranged line-symmetrically.

[0012] As shown in FIG. 2, the existing upper frame 210 is a molded member including an upper frame main body 213, fixing portions 211, 212, and a groove portion 214. The upper frame main body 213 is a planar portion extending horizontally. The upper surface of the upper frame main body 213 is disposed opposite the upper surface 401 of the opening O. The fixing portions 211, 212 are provided contiguous with the upper frame main body 213 at both ends of the upper frame main body 213 in the looking direction Z. A first fixing portion 211 is provided on the outdoor side ZO in the looking direction Z, and a second fixing portion 212 is provided on the indoor side ZI in the looking direction Z. Each fixing portion 211, 212 is fixed to the upper surface 401 of the opening O. An upper edge member 404 is provided at the end of the opening O on the indoor side ZI in the looking direction Z.

[0013] The groove portion 214 is a groove that opens downward, with the lower surface of the upper frame main body 213 as the groove bottom. The groove portion 214 is formed by the upper frame main body 213, a first plate portion 216, and a second plate portion 217. The first plate portion 216 and the second plate portion 217 are flat plate-shaped portions that extend downward from both ends of the upper frame main body 213 in the forward direction Z. The first plate portion 216 and the second plate portion 217 extend parallel to each other over the entire length of the existing upper frame 210 in the forward direction X. The lower portions of the first plate portion 216 and the second plate portion 217 are provided to protrude downward below the upper surface 401 of the opening O. A rim 218 is provided at the lower end of the second plate portion 217. The rim 218 is provided to protrude from the lower end of the second plate portion 217 toward the first plate portion 216. The groove portion 214 is a portion into which an existing shoji screen (not shown) was movably inserted.

[0014] As shown in FIG. 7 , the existing vertical frame 230 is a mold member including a vertical frame main body 233, fixing portions 231, 232, and a groove portion 234. The vertical frame main body 233 is a planar portion extending vertically. The vertical frame main body 233 is arranged facing the side surface 403 of the opening O. The fixing portions 231, 232 are provided contiguous with the vertical frame main body 233 at both ends of the vertical frame main body 233 in the looking direction Z. A first fixing portion 231 is provided on the outdoor side ZO in the looking direction Z, and a second fixing portion 232 is provided on the indoor side ZI in the looking direction Z. Each fixing portion 231, 232 is fixed to the side surface 403 of the opening O. A horizontal edge member 405 is provided at the end of the opening O on the indoor side ZI in the looking direction Z.

[0015] The groove portion 234 is a groove that opens in the front direction X, with the surface of the vertical frame main body 233 as the groove bottom. The groove portion 234 is formed by the vertical frame main body 233, a first plate portion 236, and a second plate portion 237. The first plate portion 236 and the second plate portion 237 are flat plate-shaped portions that extend in-plane from both ends of the vertical frame main body 233 in the front direction Z. The first plate portion 236 and the second plate portion 237 extend parallel to each other over the entire length of the existing vertical frame 230 in the vertical direction Y. The first plate portion 236 and the second plate portion 237 are provided to protrude inward of the frame in the front direction X beyond the side surface 403 of the opening O. A rim 238 is provided at the protruding end of the second plate portion 237. The rim 238 is provided to protrude from the protruding end of the second plate portion 237 toward the first plate portion 236. The groove portion 234 is a portion where an existing shoji screen (not shown) was movably placed.

[0016] The frame unit 100 includes an auxiliary member 2, a new frame 3, a groove cover 4, and a front cover 6. The auxiliary member 2 is disposed between the new frame 3 and the existing frame 200, and the groove cover 4 and the front cover 6 cover a portion of the auxiliary member 2 and the new frame 3.

[0017] The auxiliary member 2 is configured to be movable in the in-plane direction of the opening O relative to the existing frame 200 and to be able to be engaged with the existing frame 200. The auxiliary member 2 is provided on the upper frame of the existing frame 200 and the new frame 3, and between the pair of vertical frames.

[0018] Figure 2 shows an upper support member 2A installed between the existing upper frame 210 and the upper frame 31 of the new frame 3. The upper support member 2A is a long member with a length approximately equal to the overall length of the upper frame 31 of the new frame 3 in the forward direction X. The upper support member 2A has a fixed portion 21 and a pair of engaging pieces 24, 25. The fixed portion 21 has a generally flat plate shape that covers the groove portion 214 of the existing upper frame 210. The fixed portion 21 is arranged along the forward direction Z. The upper frame 31 of the new frame 3 is fixed to the fixed portion 21. The pair of engaging pieces 24, 25 are formed to extend upward in a generally vertical direction from both ends of the fixed portion 21 in the forward direction Z. The pair of engaging pieces 24, 25 are formed parallel to each other. The cross-sectional shape perpendicular to the longitudinal direction of the upper support member 2A, i.e., the vertical cross-sectional shape along the forward direction Z, is approximately U-shaped. The distance between the pair of engagement pieces 24, 25 in the prospective direction Z is slightly shorter than the distance between the first plate portion 216 and the second plate portion 217 of the existing upper frame 210. The pair of engagement pieces 24, 25 are arranged so as to be insertable into the groove portion 214 of the existing upper frame 210.

[0019] A locking protrusion 26 is provided on one of the pair of engagement pieces 24, 25. In the example shown in Fig. 2, the locking protrusion 26 is provided on the engagement piece 24 on the indoor side ZI. The locking protrusion 26 bends and protrudes from the upper end of the engagement piece 24 towards the indoor side ZI in the projection direction Z. The locking protrusion 26 has a protruding length approximately equal to the protruding length of the rim 218 of the second plate portion 217 of the existing upper frame 210.

[0020] A stopper 23 is provided at the lower end of the engagement piece 24. The stopper 23 is provided protruding from the lower end of the engagement piece 24 towards the indoor side ZI. Similar to the engagement piece 24, a stopper 22 is provided at the lower end of the engagement piece 25. Each stopper 22, 23 comes into contact with the lower ends of the first plate portion 216 and the second plate portion 217 when the upper support member 2A is inserted into the groove portion 214 and lifted upward. As a result, it is possible to prevent the upper support member 2A from becoming buried in the groove portion 214 of the existing upper frame 210.

[0021] FIG. 7 shows the vertical support member 5 provided between the existing vertical frame 230 and the vertical frame 8 of the new frame 3. The vertical support member 5 is a long member having a length approximately equal to the overall length of the vertical frame 8 of the new frame 3 in the vertical direction Y. The vertical support member 5 has a fixed portion 51 and a pair of engaging pieces 54, 55. The fixed portion 51 has a substantially flat plate shape that covers the groove portion 234 of the existing vertical frame 230. The fixed portion 51 is arranged along the vertical direction Y. The vertical frame 8 of the new frame 3 is fixed to the fixed portion 51. The pair of engaging pieces 54, 55 are formed to protrude and extend approximately vertically in the visual direction X from both ends of the fixed portion 51 in the visual direction Z. The pair of engaging pieces 54, 55 are formed parallel to each other. The cross-sectional shape of the vertical support member 5 perpendicular to the longitudinal direction, i.e., the horizontal cross-sectional shape along the visual direction Z, is approximately U-shaped. The distance between the pair of engagement pieces 54, 55 in the prospective direction Z is slightly shorter than the distance between the first plate portion 236 and the second plate portion 237 of the existing vertical frame 230. The pair of engagement pieces 54, 55 are arranged so as to be insertable into the groove portion 234 of the existing vertical frame 230.

[0022] 10, the existing lower frame 220 is fixed to the lower surface 402 of the opening O. The lower frame 32 of the new frame 3 is fixed to the upper part of the existing lower frame 220. A groove cover 9B is provided on the upper surface of the lower frame 32.

[0023] The new frame 3 includes an upper frame 31, a lower frame 32, and a pair of vertical frames 33. FIG. 1 shows an example of the upper frame 31 and the lower frame 32. FIG. 5 shows an enlarged view of the existing frame 200 and frame unit 100 at the top of the opening O. FIG. 6 shows an example of the vertical frame 33. FIG. 7 shows an enlarged view of the existing frame 200 and frame unit 100 at the bottom of the opening O. The new frame 3 is disposed inside the in-plane direction of the existing frame 200 for the sash. The new frame 3 is fixed to the existing frame 200 via auxiliary members 2, which will be described later. In other words, the auxiliary members 2 are provided between the upper frame 31 and the pair of vertical frames 33 of the new frame 3 and the existing frame 200, and are fixed to the existing frame 200. The new frame 3 is fixed to the existing frame 200 by fixing the auxiliary members 2 to the existing frame 200.

[0024] As shown in FIG. 5, upper grooves 34, 35 extending in the front direction X are formed in the upper frame 31. The upper grooves 34, 35 are arranged so that the shoji screen 300 can move in the front direction X. A plurality of upper grooves 34, 35 are formed according to the number of shoji screens 300 to be attached to the new frame 3. In the illustrated example, two upper grooves 34, 35 are formed. The two upper grooves 34, 35 are formed by a top surface portion 311, two side wall portions 341, 344, and a partition wall 342. The two side wall portions 341, 344 are walls formed parallel to the front direction X and extending downward. The partition wall 342 is a wall formed parallel to the two side wall portions 341, 344 and extending downward. Of the two upper groove portions 34, 35, the groove located on the indoor side ZI in the projection direction Z is referred to as the first upper groove portion 34, and the groove located on the outdoor side ZO in the projection direction Z is referred to as the second upper groove portion 35.

[0025] A fixing portion 39 is provided on the upper surface of the upper frame 31. The fixing portion 39 is a portion that abuts and fixes the upper frame 31 to the auxiliary member 2. In the illustrated example, the fixing portion 39 is a top surface portion 311 located on the first upper groove portion 34 on the indoor side ZI in the projection direction Z.

[0026] A first positioning portion 313 and a second positioning portion 314 are provided on the upper portion of the upper frame 31. The first positioning portion 313 is a portion that determines the vertical position of the upper frame 31 relative to the auxiliary member 2. The first positioning portion 313 is provided at the upper end of the upper frame 31 on the indoor side ZI in the projection direction Z. Therefore, the first positioning portion 313 abuts against the upper auxiliary member 2A. The second positioning portion 314 is a portion that determines the vertical position of the upper frame 31 relative to the existing frame 200. The second positioning portion 314 is provided at a position that corresponds to the lower end of the existing upper frame 31 on the outdoor side ZO in the projection direction Z when the new frame 3 is fixed to the existing frame 200. The second positioning portion 314 abuts against the existing upper frame 210.

[0027] A first recess 38 that opens downward is formed in the upper part of the first upper groove 34. The first recess 38 has a concave shape that opens downward into the first upper groove 34. A locking piece 381 that extends horizontally is formed at the opening edge of the first recess 38. The fixing portion 39 is a top surface portion 311 at the position of the first recess 38. The first recess 38 is formed over the entire length of the upper frame 31 in the viewing direction X.

[0028] A second recess 315 is provided near the second positioning portion 314. The second recess 315 is provided on the upper surface of the top surface portion 311 and adjacent to the outdoor side ZO in the forward direction Z relative to the second positioning portion 314. The second recess 315 is provided so as to be able to engage with the cover member 52. The second recess 315 has a recessed shape that opens upward. The second recess 315 is formed over the entire length of the upper frame 31 in the forward direction X.

[0029] The cover member 52 is a resin member that covers the gap between the upper surface 401 of the building opening O and the upper frame 31 when the new frame 3 is fixed to the existing frame 200. The cover member 52 has a length that is approximately equal to the length of the upper frame 31 in the facing direction X. The base 521 of the cover member 52 is inserted into and engaged with the opening slit 316 of the second recess 315. The cover member 52 prevents the existing upper frame 210 from being exposed to the outside. As a result, it is possible to improve the insulation performance, airtightness performance, dustproofness, and exterior design.

[0030] A third recess 343 is provided at the lower end of the partition wall 342 of the upper frame 31. The third recess 343 is provided so that the buffer member 53 can be engaged therein. The third recess 343 has a recessed shape that opens into the groove portion 34 on the outdoor side ZO. The third recess 343 is formed over the entire length of the upper frame 31 in the viewing direction X.

[0031] The buffer member 53 has a base 531 and an outer surface portion 532. The base 531 is inserted into and engaged with the third recess 343, and the outer surface portion 532 protrudes into the groove portion 34. The buffer member 53 is a member that comes into contact with the upper frame of the shoji screen 300 when the shoji screen 300 is installed in the new frame 3. The buffer member 53 prevents the shoji screen 300 from coming into direct contact with the upper frame 31. As a result, it contributes to preventing rattling and contact noise of the shoji screen 300 against the new frame 3, and to improving insulation performance and airtightness performance.

[0032] A fourth recess 36 is formed in the side wall 341 on the indoor side ZI in the projection direction Z, i.e., in the lower end of the side wall 341 that constitutes the first upper groove portion 34. The fourth recess 36 has a concave shape that opens toward the outdoor side ZO in the projection direction Z. The fourth recess 36 is formed over the entire length of the upper frame 31 in the projection direction X. A groove cover 4, which will be described later, is engaged in the fourth recess 36.

[0033] A cover hook 345 is formed on the indoor side ZI surface of the side wall portion 341. The cover hook 345 is formed to protrude from the indoor side ZI surface of the side wall portion 341 toward the indoor side ZI. The cover hook 345 engages with a front cover 6, which will be described later.

[0034] The groove cover 4 is provided in the groove portion 34 of the upper frame 31 of the new frame 3. The groove cover 4 is, for example, a flexible member made of resin. The groove cover 4 is provided over the entire length of the groove portion 34 of the upper frame 31. The groove cover 4 has a generally U-shaped vertical cross section in the projection direction Z. The groove cover 4 has a top surface portion 454 extending generally horizontally and side wall portions 451 extending vertically. The groove cover 4 is arranged so that it opens downward. The groove cover 4 covers the first recess 38 and is provided along the groove portion 34 of the upper frame 31. A locking portion 456 is provided at the end of the top surface portion 454 on the outdoor side ZO in the projection direction Z. The locking portion 456 protrudes upward from the end of the top surface portion 454 on the outdoor side ZO, with its upper end protruding toward the outdoor side ZO. The locking portion 456 is a protrusion that can be locked to the opening edge of the first recess 38 of the upper frame 31.

[0035] The lower end of each side wall portion 451 of the groove cover 4 has locking portions 452, 453 that can be locked with the lower end of the side wall portion 341 of the upper frame 31 and the partition wall 342. The locking portion 452 on the indoor side ZI has a shape that allows it to be locked with the fourth recess 36 of the side wall portion 341. The locking portion 453 on the outdoor side ZO has a shape that allows it to be locked so as to cover the lower end of the partition wall 342 from the side and below. A shoji screen sealant 68 is provided at the lower end of the locking portion 453. The shoji screen sealant 68 is formed to protrude from the lower end of the locking portion 453 toward the outdoor side ZO.

[0036] The front cover 6 covers the indoor side ZI side of the new frame 3 and the auxiliary member 2. The front cover 6 has a front cover main body 61 and a fixing member 62. The fixing member 62 is a member that is fixed to the upper edge member 404 with a screw 93 via the relay member 215. The upper end of the fixing member 62 abuts against the relay member 215 and is fixed. A hook portion 63 that extends upward is formed at the lower end of the fixing member 62. The fixing member 62 may be formed long over the entire length in the front direction X, or multiple fixing members 62 may be provided at intervals in the front direction X.

[0037] The front cover body 61 is an elongated member extending over the entire length in the forward direction X. The front cover body 61 has a flat plate portion 64, an upper locking portion 65, a rear locking piece 66, and a lower locking piece 67. The flat plate portion 64 is formed to extend in the vertical direction. The upper locking portion 65 is provided at the upper end of the flat plate portion 64 and has a hook shape that opens downward. The upper locking portion 65 is configured to be able to lock onto the hook portion 63. The rear locking piece 66 is provided in the middle of the flat plate portion 64 in the vertical direction and protrudes from the rear surface of the flat plate portion 64. The lower locking piece 67 bends from the lower end of the flat plate portion 64 toward the outdoor side ZO in the forward direction Z and extends upward at a position away from the rear surface of the flat plate portion 64. The lower locking piece 67 is configured to be able to lock onto the cover hook 345 of the side wall portion 341. The lower locking piece 67 has an abutment portion 671 that abuts against the lower end of the side wall portion 341. The front cover main body 61 is detachably locked to the fixing member 62.

[0038] A shoji sealant 68 is provided at the lower end of the front cover main body 61. The shoji sealant 68 is formed to protrude from the lower end of the engagement portion 453 to the outdoor side ZO. The shoji sealant 68 provided on the groove cover 4 and the front cover main body 61 may be made of, for example, a flat plate member made of soft resin or a brush-like member. The shoji sealant 68 comes into contact with the upper end of the shoji 300 and seals the gap between the shoji 300 and the new frame 3.

[0039] As shown in Figures 6 and 8, vertical grooves 84, 85 extending in the front direction X are formed in the vertical frame 8 of the new frame 3. The vertical grooves 84, 85 are arranged so that the shoji screen 300 can move in the front direction X. A plurality of vertical grooves 84, 85 are formed according to the number of shoji screens 300 to be attached to the new frame 3. Of the two vertical grooves 84, 85, the groove located on the indoor side ZI in the front direction Z is referred to as the first vertical groove 84, and the groove located on the outdoor side ZO in the front direction Z is referred to as the second vertical groove 85.

[0040] A fixing portion 89 is provided on the vertical frame 8. The fixing portion 89 is a portion that abuts and fixes the vertical frame 8 to the vertical support member 5. In the illustrated example, the side surface portion 81 located on the first vertical groove portion 84 on the indoor side ZI is the fixing portion 89.

[0041] A recess 815 is provided on the outer surface of the side surface portion 81. The recess 815 is provided near the fixed portion with the vertical support member 5. The recess 815 is provided so that the cover member 52 can be engaged therewith. The recess 815 has a concave shape that opens toward the side surface 403 of the opening O. The recess 815 is formed over the entire length of the vertical frame 8 in the vertical direction Y. The cover member 52 is engaged in the recess 815. The configuration of the cover member 52 is the same as that of the cover member 52 of the upper frame 210.

[0042] As shown in FIG. 9 , the groove cover 9 is provided in the first vertical groove portion 84 of the vertical frame 8 of the new frame 3. The groove cover 9 is a flexible member made of, for example, resin. The groove cover 9 is provided over the entire length of the first vertical groove portion 84 of the vertical frame 8. The groove cover 9 covers the first vertical groove portion 84. Engagements 912, 913 are provided at the end of the opening O in the facing direction X of the wall portion of the groove cover 9. The engagement portions 912, 913 are protrusions that can be engaged with the opening edge of the first vertical groove portion 84 of the vertical frame 8. A front cover 98 is provided at the end of the indoor side ZI of the groove cover 9. The front cover 98 is provided integrally with the groove cover 9. Similar to the front cover 6 provided on the upper frame 31, the front cover 98 covers the indoor side ZI of the new frame 3 and the vertical support member 5. The front cover 98 has an engagement portion 981. A fixing member 62 similar to that of the upper frame 31 is provided at the opening O. Specifically, the fixing member 62 is fixed to the horizontal edge member 405 with a screw 93 via a relay member 215. A locking portion 981 of the front cover 98 is locked to a hook portion 63 of the fixing member 62. The fixing member 62 may be formed long over the entire length in the vertical direction Y, or multiple fixing members 62 may be provided at intervals in the vertical direction Y.

[0043] As shown in Figures 2, 5, 8, and 9, in the frame unit 100, an upper support member 2A is provided between the existing upper frame 210 and the upper frame 31 of the new frame 3. In the frame unit 100, a vertical support member 5 is provided between the existing vertical frame 230 and the vertical frame 8 of the new frame 3. The upper frame 31 of the new frame 3 is fixed at an arbitrary position to the fixing portion of the upper support member 2A with screws 92. The upper support member 2A is fixed to the existing upper frame 210 with screws 92, thereby fixing the upper frame 31 to the existing upper frame 210. The vertical frame 8 of the new frame 3 is fixed to the fixing portion of the vertical support member 5 with screws 92. The vertical support member 5 is fixed to the existing vertical frame 230 with screws 92, thereby fixing the vertical frame 8 to the existing vertical frame 230.

[0044] Cushioning material 500 may be provided at the joint between the existing frame 200 and the auxiliary member. Specifically, as shown in FIG. 2, the cushioning material 500 may be provided between the first plate portion 216 of the existing upper frame 210 and the engagement piece 25 of the upper auxiliary member 2A, and between the second plate portion 217 and the engagement piece 24 of the upper auxiliary member 2A. As shown in FIG. 7, the cushioning material 500 may be provided between the first plate portion 236 of the existing vertical frame 230 and the engagement piece 55 of the vertical auxiliary member 5, and between the second plate portion 237 of the existing vertical frame 230 and the engagement piece 54 of the vertical auxiliary member 5. The cushioning material 500 is fixed in advance to either the existing upper frame 210 or the upper auxiliary member 2A. The cushioning material 500 is fixed in advance to either the existing vertical frame 230 or the vertical auxiliary member 5. As a result, the existing frame 200 and the auxiliary members 2A and 5 can be easily aligned. This can improve adhesion at the joint between the existing frame 200 and the auxiliary members 2A and 5. Since the buffer material 500 is fixed in advance to either the existing frame 200 or the auxiliary members 2A and 5, which are one of the parts that come into contact at the joint, it is possible to eliminate the need to attach the buffer material at the construction site.

[0045] Cushioning material may be provided at the joint between the auxiliary members 2A, 5 and the new frames 3, 8. Specifically, cushioning material may be provided between the underside of the top surface 311 of the upper auxiliary member 2A and the fixing portion 39 of the upper auxiliary member 2A. The cushioning material is fixed in advance to either the underside of the top surface 311 of the existing upper frame 210 or the upper surface of the fixing portion 39 of the upper auxiliary member 2A. As a result, it is possible to improve the adhesion at the joint between the new frames 3, 8 and the auxiliary members 2A, 5. By fixing the cushioning material in advance to either the new frames 3, 8 or the auxiliary members 2A, 5, which are one of the parts that come into contact at the joint, it is possible to eliminate the need to attach the cushioning material at the construction site.

[0046] Next, we will explain the frame unit installation method. The frame unit installation method is a method of installing a frame unit as an adapter between the new shoji screen and the existing frame when replacing the shoji screen of an existing sash unit. As shown in Figure 11, the frame unit installation method includes step S1 of engaging the auxiliary member with the existing frame, step S2 of fixing the new frame to the auxiliary member, step S3 of adjusting the position of the new frame relative to the existing frame, and step S4 of fixing the auxiliary member to the existing frame.

[0047] First, an example of attaching the upper support member 2A and the upper frame 31 of the new frame 3 to the existing upper frame 210 will be described. The upper support member 2A is engaged with the existing upper frame 210 (step S1). As shown in FIG. 2, the pair of engagement pieces 24, 25 of the upper support member 2A are inserted into the groove 214 of the existing upper frame 210. Specifically, the engagement protrusion 26 of the engagement piece 24 on the indoor side ZI of the upper support member 2A is first inserted into the groove 214, and then the engagement piece 25 on the outdoor side ZO is inserted into the groove 214. The distance between the pair of engagement pieces 24, 25 is slightly shorter than the distance between the first plate portion 216 and the second plate portion 217 of the existing upper frame 210. Therefore, when the pair of engagement pieces 24, 25 are inserted into the first groove 214, they come into contact with the first plate portion 216 and the second plate portion 217, respectively, and the upper support member 2A is fitted into the first groove 214. Because the upper auxiliary member 2A is a lightweight component, once the upper auxiliary member 2A is fitted into the first groove portion 214, it is held in an engaged state. At this time, the upper auxiliary member 2A is engaged to such an extent that it can move vertically relative to the existing upper frame 210. When the upper auxiliary member 2A is inserted into the groove portion 214 and lifted upward, the stoppers 22, 23 of the upper auxiliary member 2A come into contact with the lower ends of the first plate portion 216 and the second plate portion 217. As a result, it is possible to prevent the upper auxiliary member 2A from becoming buried in the groove portion 214 of the existing upper frame 210.

[0048] Next, as shown in Figure 3, the upper frame 31 of the new frame 3 is fixed to the upper support member 2A (step S2). The top surface 311 of the upper frame 31 is brought close to the existing upper frame 210, and the fixing portion 39 is abutted against the fixing portion 21 of the upper support member 2A. In this state, screws 92 are inserted into the first recesses 38 from below, and the upper frame 31 of the new frame 3 is fixed to the upper support member 2A with the screws 92. The upper frame 31 is also fixed to the upper support member 2A from below on the indoor side ZI of the first recesses 38 with the screws 92. The upper frame 31 of the new frame 3 may be fixed by directly abutting it against the upper support member 2A.

[0049] Next, the upper auxiliary member 2A engaged with the existing upper frame 210 of the existing frame 200 is moved toward and away from the existing upper frame 210 to adjust the position of the upper frame 31 of the new frame 3 relative to the existing upper frame 210 (step S3). In step S2, the upper auxiliary member 2A is engaged with the existing upper frame 210 and can move in an in-plane direction. With the upper frame 210 fixed to the upper auxiliary member 2A, the position of the upper frame 31 relative to the existing upper frame 210 is adjusted while checking the position of the upper frame 210.

[0050] Next, after the position of the upper frame 31 of the new frame 3 relative to the existing upper frame 210 has been adjusted to a predetermined position, as shown in FIG. 3, the upper support member 2A is fixed to the existing upper frame 210 with screws 92 (step S4). The second plate portion 217 and the engagement piece 24 are fixed with screws 92 from the indoor side ZI. The first plate portion 216 and the engagement piece 25 are fixed with screws 92 from the outdoor side ZO. In FIG. 3, the screws 92 on the outdoor side ZO are covered with cover members 52, but the soft cover members 52 can be flipped over and fixed with screws 92. Alternatively, after the screws 92 are fixed, the cover members 52 are attached to the second recesses 315 of the upper frame 31. Thereafter, the groove cover 4 is inserted into the grooves 34 of the upper frame 31, and the locking portions 456 are locked to the opening edges of the first recesses 38 of the upper frame 31. The locking portion 452 is locked into the fourth recess 36, and the locking portion 453 is brought into contact with the lower end of the partition wall 342. This locks the groove cover 4 to the upper frame 31. In this way, the frame unit 100 is attached to the existing upper frame 210.

[0051] In this state, the connection portions of the existing upper frame 210, auxiliary member 2A, and new frame 3 are exposed on the indoor side ZI. Therefore, as shown in FIG. 4, the indoor side ZI of the frame unit 100 is covered with the front cover 6. First, the fixing member 62 is fixed to the upper edge member 404 with the screw 93, sandwiching the relay member 215. Then, the upper end of the front cover main body 61 is inserted between the hook portion 63 and the existing upper frame 210. When the upper locking portion 65 is locked with the hook portion 63, the rear locking piece 66 and the lower locking piece 67 contact and lock with the second plate portion 217, respectively. As a result, the frame unit 100 is covered with the front cover 6. Because the front cover main body 61 is detachably locked to the fixing member 62, it can be easily removed from the fixing member 62 during maintenance work, etc.

[0052] Next, the process of attaching the vertical support member 5 and the vertical frame 8 of the new frame 3 to the existing vertical frame 230 will be described. The vertical support member 5 is engaged with the existing vertical frame 230 (step S1). As shown in FIG. 7 , the pair of engagement pieces 54, 55 of the vertical support member 5 are inserted into the groove 234 of the existing vertical frame 230. Specifically, the engagement piece 54 on the indoor side ZI of the vertical support member 5 is inserted into the groove 234 first, and then the engagement piece 55 on the outdoor side ZO is inserted into the groove 244. The distance between the pair of engagement pieces 54, 55 is slightly shorter than the distance between the first plate portion 236 and the second plate portion 237 of the existing vertical frame 230. Therefore, when the pair of engagement pieces 54, 55 are inserted into the first groove 234, the pair of engagement pieces 54, 55 come into contact with the first plate portion 236 and the second plate portion 237, respectively, and the vertical support member 5 is fitted into the first groove 234. Because the vertical support member 5 is a lightweight component, it is held in an engaged state when it is fitted into the first groove portion 234. At this time, the vertical support member 5 is engaged with the existing vertical frame 230 to an extent that it can move in the in-plane direction and in the horizontal direction, i.e., the facing direction X.

[0053] Next, as shown in Figure 8, the vertical frame 8 of the new frame 3 is fixed to the vertical support member 5 (step S2). The vertical frame 8 is brought close to the existing vertical frame 230, and the fixing part 89 is brought into contact with the fixing part 51 of the vertical support member 5. In this state, the vertical frame 8 of the new frame 3 is fixed to the vertical support member 5 from the facing direction X with screws 92. The vertical frame 8 of the new frame 3 may be fixed directly to the vertical support member 5 without providing a cushioning material.

[0054] Next, the vertical support member 5 engaged with the existing vertical frame 230 is moved toward and away from the existing vertical frame 230 to adjust the position of the vertical frame 8 of the new frame 3 relative to the existing vertical frame 230 (step S3). In step S2, the vertical support member 5 is engaged with the existing vertical frame 230, and the vertical support member 5 is movable in the in-plane direction. With the vertical frame 8 fixed to the vertical support member 5, the position of the vertical frame 8 relative to the existing vertical frame 230 is adjusted while checking the position of the vertical frame 8.

[0055] Next, after the position of the vertical frame 8 of the new frame 3 relative to the existing vertical frame 230 has been adjusted to a predetermined position, as shown in FIG. 9 , the vertical support member 5 is fixed to the existing vertical frame 230 with screws 92 (step S4). The second plate portion 237 and the engagement piece 54 are fixed with screws 92 from the indoor side ZI. The first plate portion 236 and the engagement piece 55 are fixed with screws 92 from the outdoor side ZO. In FIG. 9 , the screws 92 on the outdoor side ZO are covered with cover members 52, but the soft cover members 52 can be flipped over and fixed with screws 92. Alternatively, after fixing with screws 92, the cover members 52 are attached to the side portions 81 of the vertical frame 8. Thereafter, the groove cover 9 is inserted into the first vertical groove portions 84 of the vertical frame 8, and the locking portions 912, 913 are locked to the vertical frame 8. The groove cover 9 is detachably locked to the first vertical groove portions 84 of the vertical frame 8. In this way, the frame unit 100 is attached to the existing vertical frame 230.

[0056] As shown in FIG. 9 , when the groove cover 9 is attached to the first vertical groove portion 84 of the vertical frame 8, the indoor side ZI of the frame unit 100 is covered with the front cover 98. Next, the hook portion 63 is inserted into the locking portion 981 of the front cover 98, and the fixing member 62 is fixed to the horizontal edge member 405 with the screw 93, sandwiching the relay member 215. When the locking portion 981 of the front cover 98 is locked with the hook portion 63, the frame unit 100 is covered with the front cover 98. The front cover 98 is formed integrally with the groove cover 9, and the groove cover 9 is detachably locked to the vertical frame 8. Therefore, during maintenance work, for example, the fixing member 62 is removed from the horizontal edge member 405, and then the front cover 98 is detached from the hook portion 63, and the groove cover 9 is removed from the vertical frame 8, allowing for easy maintenance work.

[0057] According to the frame unit 100 of the embodiment, when a new shoji screen 300 is installed on an existing frame 200 (so-called renovation), if the specifications of the newly installed shoji screen 300 do not match those of the existing frame 200, the new shoji screen 300 can be easily installed using the new frame 3 and auxiliary member 2. For example, a single-pane shoji screen may be replaced with a double-pane shoji screen. The dimensions of the double-pane shoji screen may be larger than those of the single-pane shoji screen in the projection direction Z. Therefore, the dimensions of the new frame 3 corresponding to the specifications of the new shoji screen 300 in the projection direction Z are larger than those of the existing frame 200. Therefore, a shoji screen 300 with smaller in-plane dimensions than the existing frame 200 is installed. At the construction site, the new frame 3 is positioned relative to the existing frame 200. According to the frame unit 100, the auxiliary member 2 is fitted into the existing frame 200 to provide temporary support, and then the new frame 3 is fixed to the auxiliary member 2. Thereafter, the new frame 3 is moved in an in-plane direction for fine adjustment, and then the auxiliary member 2 is fixed to the existing frame 200. Therefore, the new frame 3 can be easily positioned and fixed to the existing frame 200. In particular, the upper frame 31 requires work at a high altitude, which requires time-consuming adjustment work, but the frame unit 100 makes this easy to install.

[0058] According to the frame unit 100 of the embodiment, after the new frame 3 is fixed to the upper support member 2A, the upper support member 2A can be moved in an in-plane direction to adjust the position of the new frame 3. Therefore, there is no need to provide an interference member between the upper support member 2A and the new frame 3. As a result, the number of parts can be reduced, and the burden during construction can be alleviated.

[0059] In the above embodiment, an example was shown in which the auxiliary members 2, 5 were provided on the upper frame 31 and the vertical frame 8. In addition to this example, an auxiliary member may also be provided on the lower frame.

[0060] In the above-described embodiment, an example was shown in which the fixing portion was provided in a portion of the new frame 3 in the projection direction Z, specifically on the indoor side ZI. However, the location of the fixing portion is not limited to this example. In the example of attaching a double-pane shoji screen 300 to an existing frame 200 that previously had a single-pane shoji screen attached, the dimensions of the new frame 3 are longer than the dimensions of the existing frame 200 in the projection direction Z. Therefore, the fixing portion was provided in a portion of the new frame 3 in the projection direction Z. Alternatively, if the difference in the dimensions of the existing frame and the new frame in the projection direction Z is small or equivalent, the fixing portion may be provided over the entire area of ​​the new frame in the projection direction Z. In this case, for example, a first recess may be formed in each of the first upper groove 34 and the second upper groove 35, and a screw may be inserted into each first recess to fix the frame to the auxiliary member.

[0061] In the above-described embodiment, an example has been shown in which the frame unit 100 is provided in an opening O installed in the exterior wall of a building. Therefore, as an example, an example has been shown in which the fixing part 39 and the auxiliary member 2 are arranged on the indoor side ZI of the prospective direction Z of the newly constructed frame 3. Alternatively, the fixing part 39 and the auxiliary member 2 may be arranged on the outdoor side ZO of the prospective direction Z of the newly constructed frame 3. Alternatively, the location in which the frame unit 100 is provided is not limited to the exterior wall of the building, and may be an indoor wall.

[0062] The cover member 52 and the shoji sealing material 68 shown in the above embodiment are not essential components of the frame unit 100.

[0063] The cushioning materials 500 and 501 shown in the above-described embodiment are not essential components of the frame unit 100.

[0064] The configuration of the new frame 3 is not limited to the above embodiment. For example, in the modified example shown in Figures 12 and 13, the area of ​​the fixed portion between the new frame 3 and the auxiliary member 2 is larger than in the above embodiment, and two screw holes for the screws 92 are formed in the fixing portion 39 of the new frame 3. The edge portion 317 protrudes toward the indoor side ZI beyond the side wall portion 341 of the new frame 3. At the upper part of the frame unit 100 shown in Figure 12, the edge portion 317 extends in the forward direction Z, facing the stopper 23 of the auxiliary member 2. The stopper 23 and the edge portion 317 are covered with a sealing material 71 from the indoor side ZI. At both ends of the frame unit 100 in the forward direction X shown in Figure 13, the auxiliary member 5 and the fixing portion 89 of the vertical frame 8 of the new frame 3 come into contact and are fixed with the screws 92. The fixing portion between the auxiliary member 5 and the fixing portion 89 of the vertical frame 8 of the new frame 3 is covered with a sealing material 71 from the indoor side ZI.

[0065] The sealant 71 is formed by folding a tape with an adhesive surface into an L-shape in cross section to cover the fixed portions of the auxiliary members 2 and 5 and the new frames 3 and 8. The sealant 71 may be, for example, an L-shaped flexible member fixed to the edge 317 with an adhesive or the like. The sealant 71 seals the gap between the new frame 3 and the auxiliary member 2, enhancing waterproof and dustproof performance. Depending on the dimensions of the existing frame 200 and the shape of the opening to be installed, the indoor side ZI of the fixed position between the auxiliary member 2 and the new frame 3 may be covered by the front cover 6, as in the first embodiment, or the fixed position between the auxiliary member 2 and the new frame 3 may be positioned at the same height as the upper end of the front cover 6 or higher, as shown in Figure 12. In such cases, attaching the sealant 71 ensures waterproof and dustproof performance. Using a tape-like or L-shaped sealant 71 allows for a simple structure to seal the gap between the auxiliary member and the new frame.

[0066] The construction method of the frame unit is not limited to the above embodiment. For example, the new frames 3, 8 and the auxiliary members 2, 5 may be fixed in advance, and then the auxiliary members 2, 5 may be engaged with the existing frame 200 and positioned.

[0067] The manner in which the existing frame, auxiliary member, and new frame are attached to the frame unit is not limited to the above embodiment. For example, the auxiliary member may be configured to be movable and engageable with the existing frame in the in-plane direction of the opening, and may be joined to the existing frame at any position, thereby adjusting the position of the new frame relative to the existing frame, and the new frame may be fixed to the auxiliary member. For example, in the first embodiment, an example was shown in which the auxiliary member 2 and the existing frame 200 are fixed from the projection direction Z with a screw 92. However, depending on the construction site, the protrusion dimension of the existing frame 200 from the opening may vary, and there may be cases in which it is not possible to secure space to insert the screw 92 from the projection direction Z. In such cases, the auxiliary member may be fixed to the existing frame from the in-plane direction with a screw, and the attachment position of the frame unit may be adjusted between the auxiliary member and the new frame.

[0068] Second Embodiment Next, a frame unit according to a second embodiment will be described with reference to FIGS. 14 and 15. In the following description, components common to those already described are designated by the same reference numerals, and redundant description will be omitted. As described above, the protrusion dimension from the opening of the existing frame 200 varies depending on the construction site. Therefore, for example, there are cases where it is not possible to secure space to insert a screw 92 from the prospective direction Z to secure the auxiliary member 2 to the existing frame 200. In such cases, the position of the frame unit 100 relative to the existing frame 200 can be adjusted using a positioning spacer 72. Specifically, as shown in FIG. 14, a spacer 72 is provided between the auxiliary member 2 and the new frame 3. The spacer 72 is, for example, a thin, elastic member. The gap between the auxiliary member 2 and the new frame 3 changes depending on the position of the new frame 3 relative to the existing frame 200. The number of spacers 72 is adjusted depending on the gap between the auxiliary member 2 and the new frame 3. In the example shown in FIG. 14, three spacers 72 are provided. The fixing portion 21 of the auxiliary member 2 and the fixing portion 39 of the new frame 3 are fixed to each other with a spacer 72 sandwiched between them. In the vertical frame 8 shown in Figure 15, three spacers 72 are provided between the fixing portion 89 of the vertical frame 8 and the fixing portion 51 of the vertical auxiliary member 5. In the vertical frame 8, the fixing portion 89 of the vertical frame 8 of the new frame 3 and the fixing portion 51 of the auxiliary member 5 are fixed to each other with the spacer 72 sandwiched between them.

[0069] The auxiliary member 2 and the new frame 3, sandwiched between the spacer 72, are covered from the indoor side ZI by a sealant 71. In the vertical frame 8 shown in FIG. 15, the spacer 72 is arranged between the edge 83 on the indoor side ZI side of the vertical frame 8 and the second plate portion 237 of the existing vertical frame 230, and the gap between the edge 83 and the second plate portion 237 on the indoor side ZI is covered by a sealant 71. Covering the gap between the auxiliary member 2 and the new frame 3 with the sealant 71 improves waterproofing and dustproofing performance. Because the gap between the auxiliary member 2 and the new frame 3 varies depending on the installation location of the frame unit, a configuration in which the gap is covered and adhered using a sheet-like sealant 71 provides excellent workability.

[0070] Next, a method for installing a frame unit according to this embodiment will be described with reference to Fig. 16. The method for installing a frame unit is a method for replacing a shoji screen of an existing sash unit by providing a frame unit as an adapter between the newly installed shoji screen and the existing frame. As shown in Fig. 16, the method for installing a frame unit includes a step S21 for temporarily fixing an auxiliary member to the existing frame, a step S22 for fixing the auxiliary member to the new frame, a step S23 for adjusting the position of the new frame relative to the existing frame, and a step S24 for fixing the auxiliary member to the existing frame.

[0071] First, the auxiliary member 2 is temporarily fixed to the existing frame 200 (S21). The pair of engagement pieces 24, 25 of the upper auxiliary member 2 are inserted into the groove 214 of the existing upper frame 210 in the same manner as in the first embodiment. Then, the upper auxiliary member 2 is temporarily fixed to the existing upper frame 210 from below the upper auxiliary member 2 with screws. Next, the upper auxiliary member 2 and the new frame 3 are fixed together (S22). The fixing portions 39 of the new frame 3 are positioned opposite and separate from the auxiliary member 2, and the new frame 3 is fixed to the auxiliary member 2 without fully tightening the screws 92. Next, the position of the new frame 3 relative to the existing frame 200 is adjusted (S23). Specifically, the vertical position of the new frame 3 fixed to the auxiliary member 2 with screws relative to the existing frame 200 is adjusted. The position of the new frame 3 relative to the existing frame 200 changes depending on the installation location of the frame unit. Accordingly, the distance between the existing frame 200 and the new frame 3 changes. Because the auxiliary members 2 are temporarily fixed to the existing frame 200, the number of spacers 72 to be placed between the new frame 3 and the auxiliary members 2 varies depending on the distance between the existing frame 200 and the new frame 3. Therefore, the required number of spacers 72 are inserted depending on the size of the gap between the auxiliary members 2 fixed to the existing frame 200 and the fixing parts 39 of the new frame 3, to adjust the position of the new frame 3 relative to the existing frame 200. After the spacers 72 are placed, the auxiliary members 2 are permanently fixed to the existing frame 200 with screws (S24). If there is no gap between the auxiliary members 2 temporarily fixed to the existing frame 200 and the fixing parts 39 of the new frame 3, the spacers 72 are not placed, and the auxiliary members 2 are permanently fixed to the existing frame 200 with screws (S24).

[0072] As with the first embodiment, the frame unit 100 according to this embodiment allows for easy installation using a new frame 3 and auxiliary members 2 when installing a new shoji screen 300 to an existing frame 200 (so-called renovation) and the specifications of the newly installed shoji screen 300 do not match those of the existing frame 200. With the frame unit 100 according to this embodiment, the auxiliary members 2 are temporarily fixed to the existing frame 200, and then the positions of the new frame 3 and auxiliary members 2 relative to the existing frame 200 are adjusted. This allows for easy positioning and fixing of the new frame 3 at the construction site. The frame unit 100 according to this embodiment allows for more flexible and easy positioning at the construction site by using the spacers 72. The frame unit 100 described above can be used in conjunction with the frame unit construction method according to the first embodiment and the frame unit construction method according to the second embodiment. The frame unit construction method according to this embodiment allows for flexible and easy installation of a new frame, even at construction sites where it is difficult to engage the auxiliary members with the existing frame, adjust their position, and then screw them in from the projected direction Z using the construction method according to the first embodiment. In other words, at the construction site, the construction method for the frame unit according to the first embodiment and the construction method for the frame unit according to the second embodiment can be selected as appropriate. Therefore, the construction method is excellent in workability.

[0073] The sealing material 71 is not limited to the examples shown in Figures 12 to 16. For example, it may be sealing material 71A made of a long elastic member made of resin, as shown in Figures 17 and 18. The shape of such sealing material 71A is not limited to the examples shown in the figures, and it may be any shape that covers the gap between the new frame and the auxiliary member.

[0074] The embodiments of the present disclosure have been described above in detail with reference to the drawings. The specific configuration is not limited to this embodiment, and design modifications are also included. The components shown in the above-described embodiments can be appropriately combined to form a configuration. [Explanation of symbols]

[0075] 2...Auxiliary member, 2A...Upper auxiliary member, 3...New frame, 5...Vertical auxiliary member, 8...Vertical frame, 31...Upper frame 31, 100...frame unit, 500, 501...buffer material

Claims

1. A frame unit comprising a new frame attached to an existing frame provided in an opening in a building, and an auxiliary member positioned between the new frame and the existing frame, The frame unit is equipped with a sliding door, The auxiliary member has a second engaging piece that contacts a second plate portion extending in the visible direction from the indoor end in the depth direction of the existing frame, The second engaging piece is fixed to the second plate portion with an indoor-side screw. sash.

2. The auxiliary member has a first engaging piece that contacts a first plate portion extending in the visible direction from the outer end in the depth direction of the existing frame. The sash according to claim 1.

3. The first engaging piece is fixed to the first plate portion with an outdoor screw. The sash according to claim 2.

4. The newly installed frame is provided with a cover member on the outdoor side of the outdoor side screw. The sash according to claim 3.

5. The newly installed frame has a recess on the outdoor side of the first plate portion that can lock the cover member. The sash according to claim 4.

Images