Frame body cover member, internal corner cover member, and window frame remodeling method

Abstract

To provide a frame body cover member, an internal corner cover member, and a window frame remodeling method using them which are capable of maintaining beautiful appearance and a mounting state over a long period of time, facilitating construction, and obtaining stable appearance regardless of the degree of skill of a worker.SOLUTION: A frame body cover member 200, which includes a resin base member 210 and a resin skin member 220 provided on one surface 211 of the base member 210, is configured such that the base member 210 has a thin part 212 extending in the longitudinal direction and the rate of change of the thickness of the thin part 212 is smooth and nonlinear at the thinnest part.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a frame cover material for covering a frame constituting a window frame or the like to improve its appearance when the frame deteriorates over time, and an inside corner joint material for covering an inside corner between adjacent frame covers to improve its appearance. It also relates to a window frame remodeling method using the frame cover material and the inside corner joint material. [Background technology]

[0002] Openings in the walls of buildings are provided with window frames, door frames, etc. For example, a window frame is generally constructed by arranging four frame pieces in a rectangular shape to cover the edges of the opening. A sash is then placed within the window frame, and a paper screen with a glass window attached is attached to the sash to form a window.

[0003] Window frames are made from a variety of materials, such as wood and resin, but these materials deteriorate over time due to ultraviolet rays and changes in temperature and humidity. In particular, window frames are susceptible to deterioration due to ultraviolet rays and heat, as they allow sunlight to penetrate. Deterioration causes cracks and breaks, which not only affect the functionality but also make the appearance unsightly.

[0004] In the case of a deteriorated frame as described above, a conventionally known refurbishment method involves attaching a sheet-like frame cover material onto the deteriorated frame to give it a good appearance. For example, Patent Document 1 discloses a technique for renovating window frames using a building frame cover (corresponding to a "frame cover material") made of a thin plate covered with a decorative sheet.

[0005] To summarize the technology of Patent Document 1, a cover 900 for a building frame material is formed from a thin plate 92 made of polyvinyl chloride resin covered with a decorative sheet 91 made of polyvinyl chloride, as shown in Fig. 14. In addition, a first groove 93 and a second groove 94 are formed on the back surface of the thin plate 92, which extend in the longitudinal direction in order to fold the cover 900. These first groove 93 and second groove 94 are said to be so-called V-cut grooves. The second groove 94 has a predetermined flat surface 95 at the tip of the V-cut groove, so that when the cover 900 is folded, the corners of the surface are chamfered. This makes it difficult for the decorative sheet 91 on the surface of the cover 900 to stretch at the folded portion, which is believed to make it possible to suppress whitening.

[0006] Furthermore, in the remodeling method of Patent Document 1, a corner member 96 is fixed in the gap at the inside corner formed by adjacent covers 900, and a sash joint material 97 is fixed in the gap between the sash S and the cover 900. Corner member 96 is a member with an L-shaped cross section and has a mounting portion 961, and is equipped with a long portion and a short portion. When fixed, mounting portion 961 is fitted into the gap between covers 900 so that the long portion corresponds to the recessed corner portion. In addition, the sash joint material 97 has an elastic soft portion 972 protruding from a thin plate-like main body 971, and by fitting the elastic soft portion 972 between the sash S and the cover 900, the main body 971 is fixed so as to cover the cover 900.

[0007] As mentioned above, by folding a sheet-like material along a V-cut groove of a specified shape, it is said that the cover is less likely to peel off from the building frame material. It is also said that whitening and cracking are less likely to occur even when folded, and thermal expansion and contraction that can cause poor installation can be suppressed. In addition, the joints between adjacent covers are covered with grout or sealant, allowing for a beautiful finish. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2022-189375 A Summary of the Invention [Problem to be solved by the invention]

[0009] However, with the technology of Patent Document 1, although the corners of the surface when the cover is folded are chamfered, the bent portion is bent in a straight line, and therefore there is a possibility that the ridge of the bent portion may crack or break over time. In addition, since the V-cut groove only leaves the decorative sheet, the decorative sheet may wrinkle or bulge into an arc when folded, which may require the time-consuming task of pressing it down with one's fingers to make the surface even and create a consistent chamfered shape in the longitudinal direction.

[0010] Also, the elastic soft part of the corner member is fitted between the cover and the sash. In other words, the thicker the cover, the deeper the elastic soft part can be fitted, but if the cover is thin, the elastic soft part will be fitted shallower. The cover is generally about 1.5 mm thick, so it will be fitted in an extremely shallow area. Therefore, careful work is required when applying adhesive so that it does not overflow, and even if adhesive is used in combination, the attachment strength is weak.

[0011] As described above, the technology of Patent Document 1 had the problem that workability was poor in order to remodel the window frames to improve their appearance. In addition, there was also the problem that the installed parts could come off due to the effects of external forces as well as temperature differences due to the seasons and time, causing problems with the appearance, and therefore requiring the remodeling to be done again within a short period of time.

[0012] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a frame covering material, an inside corner joint material, and a window frame remodeling method using the same, which are capable of maintaining a beautiful appearance and installation state for a long period of time, are easy to install, and can obtain a stable appearance regardless of the skill level of the worker. [Means for solving the problem]

[0013] The means adopted by the present inventors to solve the above problems will be described below. The frame covering material of the present invention is a frame covering material comprising a resin base material and a resin skin material provided on one surface of the base material. The substrate has a thinned portion extending in the longitudinal direction, i.e., the thinned portion is a portion in which only a small amount of the substrate remains. The rate of change in thickness of the thin-walled portion is characterized by being smoothly nonlinear at the thinnest portion.

[0014] In a concave cross-sectional shape, if the rate of change in thickness of the thin-walled portion is linear (straight line) like a V-cut groove and the thinnest portion is discontinuous (a state in which there is an apex like the valley of a V-cut groove), a corner will be created when folded, with the discontinuous portion of the thinnest portion as the apex. In other words, as a frame cover material, a straight ridge will be created in the skin material. In this linear ridge, elongation occurs in a very small area, which generates relatively large stress, causing very small whitening and cracks. As a result, the whitening, cracks, tears, etc. progress over time and with environmental changes, making the product prone to poor appearance.

[0015] In contrast, in the present invention, the rate of change in the thickness of the thin-walled portion is smoothly nonlinear at the thinnest portion. In other words, since there is no discontinuous portion and the thinnest portion is smoothly connected, there is no bending at a vertex. In addition, since the thickness changes nonlinearly, the thin-walled portion bends gradually from the thin portion to the thick portion when bent, so that the entire thin-walled portion bends significantly from the thinnest portion to describe a curved surface.

[0016] Due to the above-mentioned configuration, the frame cover of the present invention does not cause phenomena such as fine whitening when attached, and is therefore less likely to suffer from poor appearance such as whitening, cracks, or tears even after a long period of time has passed.

[0017] In addition to the above, the present invention also provides a method for solving the above-mentioned problems, in which the cross-sectional shape of the thin-walled portion is semi-elliptical. The semi-elliptical shape in the present invention is not limited to a shape that is exactly half an ellipse, but also includes a shape that is less than half, such as 1 / 3, of an ellipse. Furthermore, the depth and width of the ellipse are included in the semi-ellipse of the present invention, regardless of whether they are greater.

[0018] By making the cross-sectional shape of the thin-walled portion semi-elliptical, when the thin-walled portion is bent for installation, the curve of the bent portion in the cross-section tends to be an arc. If the curve formed when bent is an arc, the elongation caused by bending tends to be relatively constant, and large localized elongation does not occur.

[0019] As another means adopted by the present invention to solve the above-mentioned problems, it is possible to configure the thin-walled portion so that it can be bent at 90 degrees in the direction in which the outer surface of the skin material extends without breaking the base material. By configuring the thickness and material so that the base material remains connected without breaking when bent 90 degrees, the surface of the curved part bent during installation can be made smooth.

[0020] As another aspect of the present invention, the cross-sectional shape of the entire frame cover material may have a long piece portion and a short piece portion. In this configuration, the thin-walled portion is provided on the long piece portion, and the length from the boundary between the long piece portion and the short piece portion to the thin-walled portion is set based on the thickness of the frame body to be remodeled.

[0021] With the above-mentioned configuration, the portion from one end of the long piece to the thin portion sufficiently covers the depth direction of the frame body, and the portion from the thin portion to the short piece covers the thickness of the frame body without excess or deficiency. The short piece covers the portion from the protruding tip of the frame body to the wall surface. In this manner, with the above-described configuration, the entire frame body can be sufficiently covered without any gaps, allowing for a remodeled appearance with a good appearance.

[0022] On the other hand, as a method for renovating a window frame using the frame covering material of the present invention, a method can be adopted in which each frame of an existing window frame consisting of at least three or more frame pieces is covered to renovate it. The above-mentioned remodeling method includes an inside corner processing process of attaching an inside corner joint material to the inside corners of each frame body to be remodeled, a frame body covering process of bending the above-mentioned frame body cover material at the thin-walled portion and fixing it to each of the frame bodies, and a joint processing process of attaching a sash joint material along the window sash.

[0023] The above-mentioned window frame renovating method includes, in addition to the frame covering process, a joint treatment process using a sash joint material and an inside corner treatment process using an inside corner joint material, so that in a window frame consisting of at least three or more frame pieces, not only the frame itself but also the gaps between the frame cover material and the sash and the gaps between adjacent frame cover materials can be covered to give a good appearance.

[0024] In the above configuration, it is also possible to further configure the inside corner joint material to include a female side joint material fixed to the frame body and a male side joint material attached to the female side joint material.

[0025] Here, the female side joint material is an elongated body having a portion that extends along the depth direction of the frame body, and is provided with a first abutment piece that abuts against one of the frame bodies and a second abutment piece that abuts against the other frame body adjacent to the one of the frame bodies, and a plurality of ribs of a predetermined width are provided protruding inwardly at predetermined intervals from the first abutment piece and the second abutment piece, and the ribs of the first abutment piece and the ribs of the second abutment piece are configured to be arranged alternately when viewed in a plan view.

[0026] The male joint material is configured to be inserted between the rib of the first contact piece and the rib of the second contact piece and fixed thereto.

[0027] In the above configuration, the female joint material has a first abutment piece and a second abutment piece, and a plurality of ribs protrude inwardly from the abutment pieces at predetermined intervals. With this configuration, the male joint material can be inserted and fixed within the range of the height of the rib protruding from the first or second abutment piece. In other words, the male joint material can be fitted to a sufficient depth, improving the attachment strength.

[0028] In addition, with the above configuration, when adhesive is poured into the recessed corner between the first and second abutment pieces, the adhesive is likely to overflow from the gaps between the ribs of each abutment piece. The overflowing adhesive adheres to the male joint material and the frame cover material to be inserted, thereby increasing the bonding area. In other words, a sufficient amount of adhesive can be filled inside the male joint material. Effect of the Invention

[0029] As described above, the frame cover material of the present invention has a smooth, nonlinear change in the thickness of the thin-walled portion at its thinnest point, so that even if a worker with any level of skill bends it during installation, the skin material can be bent without applying undue force to it, resulting in a smooth, uniform curve.

[0030] Furthermore, by using the frame covering material of the present invention to configure a window frame renovating method that includes a frame covering step, a joint treatment step, and an inside corner treatment step, it is possible to cover not only the frame itself but also gaps that occur between the sash and the frame covering material and in the inside corners throughout the entire window frame, thereby giving the entire window frame a good appearance.

[0031] In particular, when the inside corner joint material is composed of a female joint material and a male joint material, by configuring the female joint material to have two abutment pieces and a number of ribs at predetermined intervals protruding inward from these, the area over which adhesive can be applied is increased, allowing for a more secure attachment.

[0032] As a result, whitening, cracking, and tearing do not occur over time, and a beautiful appearance and installation condition can be maintained for a long period of time. In addition, construction is easy and a stable appearance can be obtained regardless of the skill level of the worker. [Brief description of the drawings]

[0033] [Figure 1] FIG. 1 is a perspective view showing a window frame to be remodeled according to the present invention. [Diagram 2]1A and 1B are a perspective view and a cross-sectional view showing a frame cover material of the present invention. [Diagram 3] 1A and 1B are a perspective view and a cross-sectional view showing a sash joint material of the present invention. [Figure 4] 1A and 1B are perspective and cross-sectional views showing a female side joint material of an inside corner joint material of the present invention. [Diagram 5] 1A and 1B are perspective and cross-sectional views showing a male side joint material of an inside corner joint material of the present invention. [Figure 6] 2 is a flowchart showing the steps of the window frame remodeling method of the present invention. [Figure 7] FIG. 2 is an explanatory diagram showing the female material treatment step of the present invention. [Figure 8] FIG. 4 is an explanatory diagram showing a preliminary processing step of the present invention. [Figure 9] FIG. 4 is an explanatory diagram showing a frame covering step of the present invention. [Figure 10] FIG. 2 is an explanatory diagram showing a joint treatment process of the present invention. [Figure 11] FIG. 2 is an explanatory diagram showing the male material treatment process of the present invention. [Figure 12] FIG. 11 is a cross-sectional view showing a modified example of the frame cover material of the present invention. [Figure 13] FIG. 11 is a perspective view showing a modified example of the inside corner joint material of the present invention. [Figure 14] FIG. 1 is an explanatory diagram illustrating a conventional example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. It should be noted that each drawing is drawn diagrammatically for the purpose of explanation, and some dimensions and shapes are shown exaggerated or simplified.

[0035] Figure 1 shows a window frame 100 consisting of four frame bodies 1·1.... Frame body 1 is a plate-like member having a given depth and a width that matches the window width, and recessed corners 2·2... are formed between the upper and lower frame bodies 1·1 and the left and right frame bodies 1'·1'. The frames 1·1... are made of various materials, but generally, wood, MDF (medium density fiberboard), resin, etc. are used. These materials deteriorate over time due to changes in temperature and humidity, and the effects of sunlight entering through the windows. For example, the paint color may fade, and cracks and fissures may appear on the surface of the frames 1·1.... Stone may also be used, but in this case, there is a risk of it cracking due to external forces.

[0036] When deterioration as described above occurs, large-scale construction is required to replace the window frame 100, which takes a lot of time and costs a lot of money. Therefore, in the present invention, by using inside corner joint materials 400·400... consisting of female joint materials 410·410... and male joint materials 420·420... in addition to frame covering materials 200·200... and sash joint materials 300·300... described below, the deteriorated window frame 100 can be renovated to have a beautiful appearance.

[0037] In the embodiment shown in Fig. 1, a sash S and a sliding door G consisting of glass and a frame are provided inside the window frame 100, but the present invention is not limited to this embodiment and can be applied to the renovation of a structure using at least three or more pieces of frame bodies 1·1.... Examples include a fitted window, a sliding door, a hinged door, a bay window, a niche, a shelf, etc.

[0038] First, the frame body covering material 200 used in the present invention will be described with reference to Fig. 2. The frame body covering material 200 of the present invention is a thin plate-like member including a resin base material 210 and a resin skin material 220 provided on one surface 211 of the base material 210. The frame body covering material 200 has a substantially L-shaped cross section and is an elongated shape having a uniform cross section that matches the width direction of the frame body 1 to which it is to be attached. This frame body covering material 200 can be manufactured by various methods, for example, by combining extrusion molding and cutting processing.

[0039] The material of the substrate 210 may be various resins that are relatively hard while having ductility, such as thermoplastic resins such as acrylonitrile butadiene styrene resin, polybutylene resin, polycarbonate resin, semi-rigid polyvinyl chloride resin, and other thermosetting resins. However, it is preferable to use polyvinyl chloride resin, which has excellent adhesion, processability, extensibility, etc. The material for the skin 220 may be a variety of relatively soft resins with good ductility, such as thermosetting resins such as polypropylene resin, polyethylene resin, soft polyvinyl chloride resin, and other thermosetting resins, but it is preferable to use polyvinyl chloride resin, which has excellent adhesion, processability, extensibility, etc.

[0040] The thickness of the base material 210 can be selected appropriately, for example, 1.3 mm. The thickness of the skin material 220 can also be selected appropriately, for example, 0.2 mm. When the thicknesses are as described above, the frame cover material 200 as a whole has a thickness of 1.5 mm.

[0041] The base material 210 is formed with a thin wall portion 212 extending in the longitudinal direction. The thinnest part of the thin wall portion 212 can be, for example, 0.3 mm, but can be appropriately adjusted according to the type of resin and the shape of the thin wall portion 212. When the above thickness is used, the frame body cover material 200 as a whole has a thickness of 0.5 mm at its thinnest part. In this way, even at the thinnest part, a layer of the base material 210 of 0.3 mm remains. In this way, by leaving the layer of the base material 210, the base material 210 does not separate when bent during installation, and it is possible to prevent the occurrence of a hard end face of the base material 210 from damaging the skin material 220 from the inner side.

[0042] The thin-walled portion 212 has a predetermined cross-sectional shape, and may be, for example, a semi-elliptical cutout shape. Specifically, as shown in the cross-sectional view of FIG. 2, it may be, for example, a semi-elliptical shape with a width of 5 mm and a height of 1 mm. In this way, when the thin-walled portion 212 has a semi-elliptical shape, the rate of change in thickness is smoothly nonlinear at the thinnest portion. That is, the thickness decreases from the thickest portion to the thinnest portion according to an elliptical function, and the thickness increases from the thinnest portion to the thickest portion according to an elliptical function while maintaining the continuity of the function. Because the thin-walled portion 212 has a continuous, smooth nonlinear shape at its thinnest portion, it can be bent to describe a smooth curved surface when bent during installation.

[0043] 2, the frame cover material 200 has, in cross section, a long piece 230 and a short piece 240 that is rounded and bent at a right angle from the long side 230. The length of the long piece 230 is slightly shorter than the depth of the frame 1 to which it is attached. In addition, the short piece 240 is slightly shorter than the amount of protrusion from the wall surface of the frame 1. Further, the aforementioned thin wall portion 212 is provided at a position closer to the short piece portion 240 side of the long piece portion 230. The length from the boundary between the long piece portion 230 and the short piece portion 240 to the thin wall portion 212 is approximately equal to the thickness of the frame body 1 to be attached.

[0044] Meanwhile, a mountain-shaped notch 231 is formed in the longitudinal direction over a predetermined range from one end of the long piece 230 on the surface of the base material 210 opposite the skin material 220. This notch 231 serves to increase the adhesion area of ​​the adhesive used during installation. In addition, since the notch 231 is formed in the longitudinal direction with a constant mountain-shaped cross section, it is easy to cut in a straight line using the notch 231 as a guide when cutting. Regarding the notch, a notch 241 is also provided over the entire length of the short piece 240 on the surface of the base material 210 opposite the skin material 220 of the short piece 240. The function of this notch 241 is also the same.

[0045] Next, the sash joint material 300 of the present invention will be described with reference to Fig. 3. The sash joint material 300 of the present invention is a member for covering a gap that occurs between the sash S and one end of the frame body covering material 100 when the above-mentioned frame body covering material 200 is attached to the frame body 1, and for terminal processing. The cross-sectional shape of the sash joint material 300 is substantially L-shaped, and has a long shape with a uniform cross-sectional shape with the same length as the frame cover material 200. The sash joint material 300 can be manufactured by various methods, for example, by extrusion molding.

[0046] The material for the sash joint material 300 can be various relatively hard resins, such as thermoplastic resins such as acrylonitrile butadiene styrene resin, polybutylene resin, polycarbonate resin, semi-rigid polyvinyl chloride resin, and other thermosetting resins, but it is preferable to use polyvinyl chloride resin, which has excellent adhesion, processability, and extensibility.

[0047] As shown in FIG. 3, the sash joint material 300 has, in cross section, a long side portion 310 and a short side portion 320 bent at a right angle from the long side portion 310. A double-sided tape (not shown) is attached to the inner surface of the long piece portion 310 in the cross-sectional shape of the sash joint filler 300. The length of the long piece portion 310 can be appropriately selected as long as it is a length that can cover the end surface of the frame cover material 200 when attached and can ensure the adhesive strength of the double-sided tape. The thickness of the long piece portion 310 is a thickness that can maintain flatness and strength during molding, and is preferably as thin as possible, and can be, for example, 1.2 mm.

[0048] On the other hand, the length (height) of the short piece 320 is preferably set so that the height from the affixed surface of the double-sided tape to the tip of the short piece 320 is equal to the overall thickness of the frame cover material 200. Specifically, taking into consideration the thickness of the double-sided tape, it is preferable to set the length (height) so that the tip of the short piece 320 touches the frame 1 and the surface of the long piece 310 is parallel to the frame 1 when the sash joint material 300 is attached.

[0049] Incidentally, a mountain-shaped notch 340 is formed on the inner surface of the short piece 320 and in the recessed corner 330 between the long piece 310 and the short piece 320. This notch 340 serves to increase the adhesion area of ​​the adhesive used during installation.

[0050] Next, the inside corner joint material 400 of the present invention will be described with reference to Figures 4 and 5. The inside corner joint material 400 of the present invention is composed of a female side joint material 410 and a male side joint material 420. First, the female side joint material 410 will be described with reference to Fig. 4. The female side joint material 410 of the present invention is a member for covering a gap that occurs when the above-mentioned frame body cover materials 200, 200' are attached to the inside corner portions 2 of adjacent frame bodies 1, 1'. The cross-sectional shape of the female side joint material 410 is substantially L-shaped, and has an elongated shape with the same length as the depth of the frame body 1. This female side joint material 410 can be manufactured by various methods, for example, by injection molding.

[0051] The material for the female side joint material 410 can be various relatively hard resins such as thermoplastic resins such as acrylonitrile butadiene styrene resin, polybutylene resin, semi-rigid polyvinyl chloride resin, and other thermosetting resins, but it is preferable to use acrylonitrile butadiene styrene resin, which has excellent adhesiveness and elasticity.

[0052] The female joint material 410 has a first abutment piece 411 that abuts against one of the frame bodies 1, and a second abutment piece 412 that abuts against the other frame body 1' adjacent to the one of the frame bodies 1. In the embodiment in Fig. 4, the window frame 100 to which it is to be attached is a rectangular window, so the first abutment piece 411 and the second abutment piece 412 form a right angle, but this angle can be changed as appropriate to match the angle of the frame bodies 1, 1'.

[0053] A plurality of ribs 413, 413', ... of a predetermined width are provided protruding inward at predetermined intervals from the first contact piece 411. The ribs 413, 413', ... of the first contact piece 411 and the ribs 413', 413', ... of the second contact piece 412 are alternately arranged in a plan view. That is, in the longitudinal direction, at a position where the rib 413 protrudes from the first contact piece 411, the rib 413' of the second contact piece 412 does not protrude, and at a position where the rib 413' protrudes from the second contact piece 412, the rib 413 of the first contact piece 411 does not protrude.

[0054] In addition, circular holes 414 are provided at a predetermined interval in either or both of the first contact piece 411 and the second contact piece 412. These holes serve to increase the adhesion area when applying an adhesive, which will be described later. In the embodiment of FIG. 4, the holes 414 are provided in the second contact piece 412, but a single hole may be formed across the first contact piece 411 and the second contact piece 412.

[0055] Furthermore, a mountain-shaped notch 415 is formed in the longitudinal direction on the surface of the second contact piece 412 opposite to the side from which the ribs 413'-413'... protrude. This notch 415 serves to increase the adhesion area of ​​the adhesive used during installation. The notch 415 may be provided on the surface of the first contact piece 411 opposite to the side from which the ribs 413 protrude, or may be provided on both surfaces.

[0056] Next, the male joint material 420 will be described with reference to FIG. 5. The male joint material 420 of the present invention is a member that is attached to the female joint material 410 described above to finish the inside corner portion 2 with a good appearance. The cross-sectional shape of the male joint material 420 is substantially T-shaped, and has a long shape whose length is the depth of the frame body 1 plus the thickness of the frame body 1. In the form shown in FIG. 5, it is composed of a long part 421 whose length corresponds to the depth of the frame body 1 and a short part 422 whose length corresponds to the thickness of the frame body 1. This male joint material 420 can be manufactured by various methods, for example, it can be manufactured by injection molding.

[0057] The material for the male joint material 420 can be various relatively soft resins such as silicone resin, synthetic rubber, and thermoplastic elastomer, but it is preferable to use a thermoplastic elastomer resin because of its moldability, adhesiveness, and freedom of choice in hardness.

[0058] The cross section of male joint material 420 has a shape having exterior surface 423 that forms the outer surface of inside corner portion 2 when attached, and fitting portion 424 that protrudes from the opposite side of exterior surface 423. The exterior surface 423 is a concave surface with a slight curvature, which smoothly connects to the inside corner portion 2 and has a shape that allows a finger to easily run along it when pushing it into the female joint material 410. The fitting portion 424 has a rib that protrudes vertically from the center of the back surface of the exterior surface 423, and the tip of the rib bulges out to form a circle. This bulging portion acts as a retainer.

[0059] Boundary 425 between long portion 421 and short portion 422 is connected in a smooth arc shape. However, mating portion 424 is not formed at boundary 425, but is formed only in long portion 421 and short portion 422. When mounting, mating portion 424 of long portion 421 is fitted into female joint material 410, but female joint material 410 is not mounted to the end face of the thickness portion of frame body 1. Therefore, mating portion 424 of male joint material 420 is inserted into the gap between frame body cover materials 200·200′ and fixed with adhesive to the end face of the thickness portion.

[0060] Here, a method for renovating a window frame 100 using the frame cover material 200, sash joint material 300, and inside corner joint material 400 of the present invention described above will be explained based on the flowchart of Figure 6, with reference to the explanatory diagrams of Figures 7 to 11 as appropriate. As shown in Figure 6, the window frame remodeling method of the present invention includes a female material processing step S1, which is one of the inside corner processing steps, a preliminary processing step S2, a frame body covering step S3, a joint processing step S4, and a male material processing step S5, which is one of the inside corner covering steps.

[0061] First, in the female member processing step S1, female side joint materials 410 are attached to the inside corner portions 2 as shown in Fig. 7. The female side joint materials 410 are prepared in advance with a predetermined length to match the depth of the frame body 1. There are a total of four recessed corners 2·2... between the top and bottom frames and the left and right vertical frames, and the second contact pieces 412 having holes 414·414... are positioned so as to contact the vertical frames.

[0062] In attaching the female joint materials 410·410..., double-sided tape (not shown) is affixed to the side of the frame 1 with which the surface of the first abutting piece 411 opposite to where the rib 413 does not protrude is abutted, and the female joint material 410 is attached. At this time, in addition to the double-sided tape, adhesive can be applied to the surface of the second abutting piece 412 on which the notch 415 is provided, and the second abutting piece 412 can be attached to the recessed corner portion 2. The adhesive can also be applied to the back surface of the first abutting piece 411 in an area that does not overlap with the double-sided tape.

[0063] The double-sided tape allows for easy installation, and when adhesive is used, it can be used as a temporary fixation until the adhesive hardens. Furthermore, the notches 415 increase the adhesive area, so that the applied adhesive can be bonded to the vertical frame body 1 with sufficient adhesive strength. Also, when the adhesive overflows inward from the holes 414·414..., the hardened adhesive is retained in the holes 414·414..., so that the fixing can be made even stronger.

[0064] Next, in the preliminary processing step S2, the distance between the female side joint materials 410-410 installed in the female material processing step S1 and dimensions such as the depth of the frame bodies 1-1... are measured, and then the frame body cover material 200, sash joint material 300, and male side joint material 420 are cut to fit the measured dimensions, as shown in Figure 8. The male joint material 420 is molded in a symmetrical shape and can be cut in the middle to obtain two male joint materials 420·420 from one molded product, but it is also possible to use L-shaped ones as shown in Figure 5 on the left and right.

[0065] Here, the frame cover material 200 and the sash joint material 300 are cut to dimensions that are approximately 1 mm shorter than the width of the frame 1, taking into consideration the dimensions of the female joint material 410 to be attached to the inside corner portions 2·2. In addition, the frame body cover material 200 is cut with an irregular cut surface so that the portion from the thin portion 212 to the short piece portion 230 is made wider so that adjacent portions, including the thickness portions of the frame bodies 1·1', can be covered with the frame body cover material 200·200 without any gaps.

[0066] Next, in the frame body covering step S3, as shown in FIG. 9, frame body cover materials 200, 200 . . . are attached to the regions between the female joint materials 410, 410 of the inside corner portions 2, 2 of each of the frame bodies 1, 1 . In the following explanation, for ease of explanation, the installation to the lower frame body 1 will be described, and the drawings also explain the installation to the lower frame body 1. However, in reality, in the case of a window frame, installation is easier in terms of adhesion etc. if the frames are installed in the order of the left and right vertical frame sides, the upper frame body, and the lower frame body.

[0067] First, the frame body covering material 200 is bent at the thin-walled portion 212 to deform the frame body covering material 200 into a U-shape. In this state, adhesive is applied to the entire back surface of the frame body covering material 200. It is preferable to apply the adhesive evenly over the entire surface using a comb. At this time, double-sided tape may be used in combination.

[0068] Then, the frame cover material 200 is attached to the frame 1. At this time, the long piece portion 230 and the short piece portion 240 are attached so that the corners of the long piece portion 230 and the short piece portion 240 fit into the protruding corner on the lower side of the frame 1. In this way, the curved portion of the thin-walled portion 212 fits into the protruding corner on the upper side of the frame 1, and the portion from the tip of the long piece portion 230 to the thin-walled portion 212 can cover the entire width of the frame 1. Note that a small gap is created between the sash S and the tip of the long piece portion 230.

[0069] Next, in the joint treatment process S4, as shown in Fig. 10, a sash joint material 300 is attached to the gap between the sash S and the tip of the long piece portion 230. In the attachment, double-sided tape (not shown) is applied to the back side of the sash long piece portion 310, and adhesive is applied to the notches 340 on the inside surfaces of the recessed corner portion 330 and the short piece portion 320. Then, the short piece portion 320 of the sash joint material 300 is inserted into the gap between the sash S and the long piece portion 230 of the frame body cover material 200, and the long piece portion 310 of the sash joint material 300 is adhesively fixed in a position positioned on top of the long piece portion 230 of the frame body cover material 200.

[0070] Finally, in the male member treatment process S5, as shown in FIG. 11, a male joint material 420 is attached to the female joint materials 410, 410... attached to the inside corner portions 2, 2.... First, adhesive is filled into the area between the ribs 413-413... of the first abutment piece 411 of the female joint material 410 and the ribs 413'-413'... of the second abutment piece 412. Then, the fitting portion 424 of the male joint material 420 is inserted between the ribs. By attaching the male joint material 420, the gaps between the frame cover materials 200-200 at the inside corners 2-2... are covered by the external surface 423 of the male joint material 420, resulting in an external appearance of a smooth connection.

[0071] At this time, the size of the gap between the ribs 413-413... of the first contact piece 411 and the ribs 413'-413'... of the second contact piece 412 is narrower than the size of the bulging portion at the tip of the fitting portion 424. Therefore, during insertion, the space between the ribs elastically deforms slightly and widens, and then when the fitting portion 424 passes between the ribs, the deformation of the ribs returns to its original state and the fitting portion 424 fits together, preventing it from coming off.

[0072] The female joint material 410 and the male joint material 420 are firmly fixed by bonding with an adhesive in addition to being fitted together by the fitting portion 424. At this time, the adhesive overflows from the gaps between the ribs 413-413... of the first contact piece 411 and the gaps between the ribs 413'-413'... of the second contact piece 412, and also adheres to the frame body cover material 200. In other words, the frame body cover material 200, the female joint material 410, and the male joint material 420 are integrated with each other by the adhesive and firmly fixed together.

[0073] In the female member processing step S1, the female joint material 410 and the frame body 1 are bonded and fixed, and the adhesive is protruding inward from the holes 414-414.... In the male member processing step S5, the adhesive for fixing the male joint material 420 is filled and applied on top of this protruding adhesive, so that when the adhesive is hardened, it is integrated with the adhesive applied in the female member processing step S2. Therefore, ultimately, not only the frame body cover material 200, the female joint material 410, and the male joint material 420, but also the frame body 1 are integrated by the adhesive and firmly fixed.

[0074] Note that the female joint material 410 is not attached to the boundaries between the thickness parts of the frame bodies 1·1 of the upper and lower frames and the frame bodies 1'·1' of the left and right vertical frames. Therefore, adhesive is applied and filled into the gaps between the frame body cover materials 200·200, and the fitting portions 424 of the male joint material 420 are fitted and fixed.

[0075] As described above, with the window frame renovating method of the present invention, the window frame 100 can be renovated to have a beautiful appearance by covering the frame bodies 1·1... with the frame body covering material 200·200... of the present invention, and by using the sash joint material 300 and inside corner joint material 400 of the present invention, the joint portion between the sash S and the frame body 1 and the inside corner portions 2·2... of the frame bodies 1·1... can also be treated to have a good appearance.

[0076] 『Variation 1』 The present invention is not limited to the above embodiment, and other embodiments may be adopted. For example, as shown in Fig. 12, the frame cover material 201 may be made of a single sheet and may be provided with two thin portions 212 and 212'. In this case, the cross-sectional shape of the thin portion 212 may be semicircular.

[0077] In this modification, the portion corresponding to the short piece 240 in the embodiment of Fig. 2 is formed by bending the thin-walled portion 212' in a preliminary processing step during the remodeling work. In this way, the frame body covering materials 201·201... can be transported in a stacked manner, which reduces transportation and management costs.

[0078] 『Variation 2』 In addition, in the present invention, other configurations can also be adopted. For example, as shown in Fig. 13, lightening holes 416 can be provided in the intermediate portions between the ribs 413 of the first contact piece 411 and the ribs 413' of the second contact piece 412 of the female side joint material 410 in the inside corner joint material 401.

[0079] In this modified example, by providing the lightening holes 416, when the adhesive for adhering and fixing the male joint material 420 is filled and applied, it not only overflows from the gaps between the ribs, but also overflows from the lightening holes 416. Therefore, the adhesive that overflows from the lightening holes 416 is also adhered and fixed to the frame cover material 200, so that it can be fixed more firmly. [Explanation of symbols]

[0080] 100 Window Frame 1 frame 2 Inside corner 200, 201 Frame cover material 210 Base material 211 One side 212 Thin-walled section 220 Skin material 230 Long side 231 Notch 240 Short piece 241 Notch 300 Sash joint material 310 Long piece part 320 Short piece 330 Inside corner 340 Notch 400,401 Corner joint material 410 Female side joint material 411 First abutment piece 412 Second abutment piece 413 Rib 414 holes 415 Notch 416 Hole 420 Male joint material 421 Long section 422 Short section 423 Exterior 424 Fitting part 425 Border S sash G Shoji screen

Claims

1. A frame cover material comprising a resin base material and a resin skin material provided on one surface of the base material, The substrate has a thin-walled portion extending in a longitudinal direction, A frame cover material, characterized in that the rate of change in thickness of the thin-walled portion is smoothly nonlinear at the thinnest portion.

2. 2. The frame cover material according to claim 1, wherein the cross-sectional shape of the thin portion is semi-elliptical.

3. 3. The frame cover material according to claim 1, wherein the thin-walled portion can be bent at 90 degrees in a direction in which the outer surface of the skin extends without breaking the base material.

4. A frame cover material having a long piece portion and a short piece portion in an overall cross-sectional shape, The thin portion is provided on the long piece portion, The frame body covering material described in claim 3, characterized in that the length from the boundary between the long piece and the short piece to the thin-walled portion is set based on the thickness of the frame body to be renovated.

5. A method for renovating an existing window frame, which comprises covering each frame body of an existing window frame having at least three or more frame bodies, comprising: An inside corner processing process in which inside corner joint materials are attached to the inside corners of each frame body to be renovated; a frame covering step of bending the frame cover material according to claim 1 or 2 at the thin-walled portion and fixing it to each of the frame bodies; A joint processing process in which sash joint material is attached along the window sash; A window frame remodeling method comprising the steps of:

6. The inside corner joint material used in the inside corner processing step is configured to include a female side joint material fixed to the frame body and a male side joint material attached to the female side joint material, The female joint material is an elongated body having a portion along the depth direction of the frame body, A first abutment piece abuts against one of the frame bodies, and a second abutment piece abuts against the other frame body adjacent to the one of the frame bodies, A plurality of ribs having a predetermined width are provided at predetermined intervals from the first contact piece and the second contact piece so as to protrude inward, The ribs of the first contact piece and the ribs of the second contact piece are alternately arranged in a plan view, The window frame remodeling method according to claim 5, characterized in that the male joint material can be inserted and fixed between the rib of the first abutment piece and the rib of the second abutment piece.

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