Simple interior window and construction method of the same

Abstract

To provide a simple inner window 100 to be added to the interior side of an outer window already installed in a window opening F of a building, and a construction method thereof.SOLUTION: The simple inner window 100 includes an outer frame 10 installed in the window opening F and a screen 20 fitted into the outer frame 10. This outer frame 10 consists of a corner member 1 fixed to the inside corner of the window opening, and an upper outer frame member 2a, a lower outer frame member 2b, and right and left vertical outer frame members 2c fixed to four sides of the window opening. With both ends of the upper outer frame member 2a, the lower outer frame member 2b, and right and left vertical outer frame members 2c inserted between a pair of cover portions 12 of each corner member 1, each outer frame member is fixed to the four sides of the window opening F.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a simple inner window and an installation method thereof, more specifically to a simple inner window that is added to the interior side of an exterior window already installed in a window opening of a building, and an installation method for the simple inner window that can easily install this simple inner window. [Background technology]

[0002] As is well known, double-glazed window structures with an exterior window and an interior window are widely used to improve the insulating performance of window openings in buildings. Also, for example, when renovating a house, an interior window is often added to the interior side of an existing exterior window to create a double-glazed window structure.

[0003] When adding an inner window to the interior side of an existing outer window, it is first necessary to install an outer frame into the window opening so that the inner window's shoji screen can be fitted in. However, in the past, the outer frame was prefabricated and then installed in the window opening, which created the problem of a great deal of labor required to lift the entire outer frame up to the window opening and fit it into it.

[0004] Furthermore, when the outer frame is installed, in order to minimize the gap between the outer frame and the window opening, it is necessary to frame the outer frame accurately to match the dimensions of the window opening. The framing work itself requires skilled techniques, making it a difficult job for so-called DIY amateurs.

[0005] Up until now, interior window structures have been proposed that aim to simplify the construction work when adding an interior window to the interior side of an existing exterior window (for example, Patent Documents 1 and 2 below). However, even in these interior window structures, a pre-framed exterior frame is installed in the window opening, and it takes a lot of effort to lift the entire exterior frame up to the window opening, and the framing work for the exterior frame requires skilled techniques. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Utility Model Application Publication No. 57-153186 [Patent Document 2] Japanese Utility Model Application Publication No. 59-54689 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was made in consideration of the above-mentioned drawbacks of conventional interior window structures and their installation methods, and has as its objective the provision of a simplified interior window with a simple structure that can be easily installed in an existing window opening, and a method for installing the same. [Means for solving the problem]

[0008] The present invention is a simple inner window that is added to the interior side of an existing outer window in a rectangular window opening of a building, The method includes the steps of: (a) providing a window opening with a frame; and (b) providing a sliding door with a frame. The outer frame is a corner member including a base portion fixed to an inside corner portion of the window opening, and a pair of cover portions extending from the base portion and facing each other with a gap therebetween; The window opening is provided with an upper outer frame member, a lower outer frame member, and left and right vertical outer frame members, each of which is fixed to each of the four sides of the window opening. the corner members are fixed to the four corners of the window opening with the cover portions of the corner members abutting against the recessed corner portions of the window opening, The upper outer frame member, lower outer frame member, and left and right vertical outer frame members are fixed to the four sides of the window opening with both end portions of the upper outer frame member, lower outer frame member, and left and right vertical outer frame members inserted between a pair of cover portions of each corner member fixed to the four corners of the window opening.

[0009] In addition, the present invention provides a method for fixing a corner member between a pair of the cover portions of each of the corner members, A gap is provided between at least one end of the upper outer frame member or the lower outer frame member and the base portion of the corner member or the left and right vertical outer frame members, or The present invention is characterized in that there is a gap between at least one end of the left and right vertical outer frame members and the base portion of the corner member, the upper outer frame member, or the lower outer frame member.

[0010] The present invention is also characterized in that the base portion of the corner member is formed into a rectangular plate having a constant thickness, the cover portion extends from each of both side edges of the base portion at a right angle in one direction, and a window opening abutment surface for abutting the window opening is formed on one plate surface of the base portion opposite the protruding direction of the cover portion, and a first outer frame member abutment surface capable of abutting the end portion of the upper outer frame member, lower outer frame member, or left and right vertical outer frame members is formed on the other plate surface of the base portion on the protruding direction side of the cover portion.

[0011] The present invention is also characterized in that a second outer frame member abutment surface capable of abutting against the ends of the upper outer frame member, the lower outer frame member, or the left and right vertical outer frame members is formed on at least one thickness surface of both end edges perpendicular to the side edge portion of the base portion, and the cover portion protrudes outward beyond the second outer frame member abutment surface.

[0012] Furthermore, the present invention is characterized in that a pair of the second outer frame member abutment surfaces and a pair of the cover portions formed on the thickness surfaces of both end edges of the base portion are formed symmetrically with respect to a virtual center plane that passes through the center of the plate surface of the base portion 11, is perpendicular to the plate surface, and is parallel to both end edges.

[0013] The present invention also provides a method for installing a simplified inner window to be added to the interior side of an existing outer window in a rectangular window opening of a building, comprising the steps of: a frame installation step of installing a frame around the window opening; A shoji fitting process of fitting a shoji into the outer frame installed by the outer frame installation process; Including, The outer frame installation step includes: a corner member preparing step of preparing a corner member including a base portion fixed to an inside corner portion of the window opening and a pair of cover portions extending from the base portion and facing each other with a space therebetween; a frame member preparation process for preparing an upper outer frame member, a lower outer frame member, and left and right vertical outer frame members to be fixed to the four sides of the window opening, respectively; a corner member fixing step of fixing the corner member to the four corners of the window opening in a state in which the cover portion of the corner member is abutted against the recessed corner portion of the window opening; a vertical outer frame member fixing process for fixing the left and right vertical outer frame members to the left and right sides of the window opening in a state in which both end portions of the left and right vertical outer frame members are inserted between a pair of the cover portions of each of the corner members fixed to the four corners of the window opening; an upper and lower outer frame member fixing process for fixing the upper outer frame member and the lower outer frame member to the upper and lower sides of the window opening in a state in which both end portions of the upper outer frame member and the lower outer frame member are inserted between the pair of cover portions of each of the corner members fixed to the four corners of the window opening; The present invention is characterized in that it includes:

[0014] The present invention also provides a method for installing a simplified inner window to be added to the interior side of an existing outer window in a rectangular window opening of a building, comprising the steps of: a frame installation step of installing a frame around the window opening; A shoji fitting process of fitting a shoji into the outer frame installed by the outer frame installation process; Including, The outer frame installation step includes: a corner member preparing step of preparing a corner member including a base portion fixed to an inside corner portion of the window opening and a pair of cover portions extending from the base portion and facing each other with a space therebetween; a frame member preparation process for preparing an upper outer frame member, a lower outer frame member, and left and right vertical outer frame members to be fixed to the four sides of the window opening, respectively; a vertical outer frame member fixing process for fixing the left and right vertical outer frame members to the left and right sides of the window opening; a corner member fixing process for fixing the corner members to the four corners of the window opening in a state in which the cover portions of the corner members are abutted against the recessed corner portions of the window opening and both ends of the left and right vertical outer frame members fixed to the left and right sides of the window opening are inserted between the pair of cover portions; an upper and lower outer frame member fixing process for fixing the upper outer frame member and the lower outer frame member to the upper and lower sides of the window opening in a state in which both end portions of the upper outer frame member and the lower outer frame member are inserted between the pair of cover portions of each of the corner members fixed to the four corners of the window opening; The present invention is characterized in that it includes:

[0015] The present invention also provides a method for installing a simplified inner window to be added to the interior side of an existing outer window in a rectangular window opening of a building, comprising the steps of: a frame installation step of installing a frame around the window opening; A shoji fitting process of fitting a shoji into the outer frame installed by the outer frame installation process; Including, The outer frame installation step includes: a corner member preparing step of preparing a corner member including a base portion fixed to an inside corner portion of the window opening and a pair of cover portions extending from the base portion and facing each other with a space therebetween; a frame member preparation process for preparing an upper outer frame member, a lower outer frame member, and left and right vertical outer frame members to be fixed to the four sides of the window opening, respectively; an upper and lower outer frame member fixing step of fixing the upper outer frame member and the lower outer frame member to upper and lower edges of the window opening; a corner member fixing process for fixing the corner members to the four corners of the window opening in a state in which the cover portions of the corner members are brought into contact with the recessed corner portions of the window opening and both ends of the upper outer frame member and the lower outer frame member fixed to the upper and lower sides of the window opening are inserted between the pair of cover portions; a vertical outer frame member fixing process for fixing the left and right vertical outer frame members to the left and right sides of the window opening in a state in which both end portions of the left and right vertical outer frame members are inserted between a pair of the cover portions of each of the corner members fixed to the four corners of the window opening; The present invention is characterized in that it includes: Effect of the Invention

[0016] According to the simplified inner window and its installation method of the present invention, when installing the outer frame in an existing window opening, corner members are fixed individually to the inside corners of the window opening, and an upper outer frame member, a lower outer frame member, and left and right vertical outer frame members are each fixed individually to the four sides of the window opening.This means that even an amateur can easily install the simplified inner window without the great effort required to install the outer frame, as was the case with conventional installation methods in which a pre-framed outer frame was installed in the window opening.

[0017] Furthermore, because the corner members are fixed to the four corners of the window opening with the cover part of each corner member abutting the inner corner of the window opening, and each outer frame member is fixed to the four sides of the window opening with both ends of the upper outer frame member, lower outer frame member, and left and right vertical outer frame members inserted between the pair of cover parts of each corner member, the outer frame can be installed with almost no gaps against the window opening. Therefore, unlike conventional installation methods in which the outer frame was precisely framed to match the dimensions of the window opening to reduce the gap with the window opening, skilled techniques are not required to install the outer frame, and simplified inner windows can be easily installed.

[0018] Furthermore, because both ends of the upper and lower outer frame members and the left and right vertical outer frame members are inserted between the pair of cover parts of each corner member, both ends of each outer frame member can be hidden by the cover parts, and even if there is a gap between each outer frame member, it can be hidden by the cover parts and the appearance of the outer frame is not marred by this gap. Therefore, there is no need to prepare outer frame members whose length is strictly matched to the dimensions of the window opening, and this also makes it easy to install a simplified inner window.

[0019] In addition, in the simplified inner window of the present invention, both ends of the upper and lower outer frame members and the left and right vertical outer frame members are simply inserted between the pair of cover parts of each corner member, and the outer frame members are not connected and fixed to each other or to the corner members. Therefore, even if the outer frame members and the window opening are thermally expanded or contracted due to temperature changes after construction, the outer frame members will not bend and the outer frame will not be distorted, and there is no risk of causing problems when opening and closing the shoji screen. [Brief description of the drawings]

[0020] [Figure 1] This is a front view of the simple inner window of this embodiment as seen from the inside of the room. [Diagram 2] FIG. 2 is a vertical cross-sectional view taken along line AA in FIG. [Diagram 3] FIG. 2 is a cross-sectional view taken along line BB in FIG. [Figure 4] 1 is a perspective view of a corner member of a simplified inner window according to the present embodiment, viewed from two directions. FIG. [Diagram 5] This is an oblique view of the outer frame base material used for the upper outer frame member, lower outer frame member, and left and right vertical outer frame members of the simplified inner window of this embodiment. [Figure 6] This is an oblique view of the first inner frame base material used for the upper and lower inner frame members of the simplified inner window of this embodiment. [Figure 7] This is an oblique view of the second inner frame base material used for the left and right vertical inner frame members of the simple inner window of this embodiment. [Figure 8] 1 is a perspective view of a bottom-raising base material used in a bottom-raising member of the simplified inner window of this embodiment. FIG. [Figure 9] This is a front view from the inside of the room, explaining the corner member fixing process of the simple inner window installation method of this embodiment. [Figure 10] This is a front view from the inside of the room, explaining the vertical outer frame member fixing process of the simple inner window installation method of this embodiment. [Figure 11] This is a front view from the inside of the room, explaining the upper and lower outer frame member fixing process of the simple inner window installation method of this embodiment. [Figure 12] This is a vertical cross-sectional view of the outer frame installed by the outer frame installation process of the simple inner window construction method of this embodiment. [Figure 13] This is a front view illustrating the shoji assembly process of the simple interior window installation method of this embodiment. [Figure 14] This is a vertical cross-sectional view illustrating the shoji fitting process of the construction method for the simple interior window of this embodiment. [Figure 15] This is a front view seen from the inside of the room, illustrating the vertical outer frame member fixing process of the construction method for a simple inner window in another embodiment of the present invention. [Figure 16] This is a front view seen from the inside of the room, illustrating the corner member fixing process of the installation method for a simple inner window in another embodiment of the present invention. [Figure 17] This is a front view seen from the inside of the room, illustrating the upper and lower outer frame member fixing process of the installation method for a simple inner window in another embodiment of the present invention. [Figure 18] This is a front view seen from the inside of the room, illustrating the upper and lower outer frame member fixing process of the installation method for a simple inner window in yet another embodiment of the present invention. [Figure 19] This is a front view seen from the inside of the room, illustrating the corner member fixing process of the installation method for a simplified inner window in yet another embodiment of the present invention. [Figure 20] This is a front view from the inside of the room, illustrating the vertical outer frame member fixing process of the construction method for a simplified inner window in yet another embodiment of the present invention. [Figure 21] A cross-sectional view of the lower outer frame member of a simple inner window in yet another embodiment of the present invention. [Figure 22] A cross-sectional view of the lower outer frame member of a simple inner window in yet another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] As shown in Figures 1 to 3, the simplified interior window 100 of this embodiment is an interior window that is added to the interior side of an exterior window (not shown) that is already installed in a window opening F of a building, and is mainly composed of an outer frame 10 installed in the rectangular window opening F and a pair of sliding paper screens 20 / 20 that are fitted into this outer frame 10 so that they can slide freely.

[0022] The outer frame 10 is composed of four corner members 1 fixed to the inside corners of the window opening F, and an upper outer frame member 2a, a lower outer frame member 2b, and left and right vertical outer frame members 2c / 2c fixed to the four sides of the window opening F. Meanwhile, the shoji screen 20 is composed of a rectangular plate-shaped panel 3, and an upper inner frame member 4a, a lower inner frame member 4b, and left and right vertical inner frame members 5a / 5a fixed to the four sides of this panel 3.

[0023] The corner member 1 constituting the outer frame 10 is made of an injection-molded product of ASA resin, and as shown in Figure 4, is composed of a base portion 11 which is fixed to the inside corner of the window opening, and a pair of cover portions 12, 12 which extend from this base portion 11 and face each other with a gap between them.

[0024] In the corner member 1 of this embodiment, the base portion 11 is formed in the shape of a rectangular plate having a certain thickness, and rectangular plate-shaped cover portions 12 extend and protrude at a right angle in one direction from both side edges of the base portion 11. A window opening abutment surface 111 that abuts against a window opening is formed on one plate surface of the base portion 11 opposite the protruding direction of the cover portion 12, and a first outer frame member abutment surface 112 that can abut against the ends of the upper outer frame member 2a, the lower outer frame member 2b, or the left and right vertical outer frame members 2c is formed on the other plate surface of the base portion 11 on the protruding direction side of the cover portion 12.

[0025] Further, second outer frame member abutment surfaces 113, 113 that can abut against the ends of the upper outer frame member 2a, the lower outer frame member 2b, or the left and right vertical outer frame members 2c are formed on the thickness surfaces of both end edges perpendicular to the side edges of the base portion 11, and the cover portion 12 protrudes outward from these second outer frame member abutment surfaces 113. Further, in this embodiment, the pair of second outer frame member abutment surfaces 113 and the pair of cover portions 12 are formed symmetrically with respect to a virtual center plane P that passes through the center C of the plate surface of the base portion 11, is perpendicular to the plate surface, and is parallel to both end edges of the base portion 11.

[0026] The upper outer frame member 2a, the lower outer frame member 2b, and the left and right vertical outer frame members 2c that make up the outer frame 10 are made of an outer frame base material 2 that is an extrusion molded product of PVC resin, as shown in Figure 5. This long outer frame base material 2 is cut to the required length as appropriate and used as the upper outer frame member 2a, the lower outer frame member 2b, and the left and right vertical outer frame members 2c.

[0027] The outer frame base material 2 has a U-shaped cross section with a screen groove 21 into which a screen 20 can be fitted, and is composed of a groove bottom 22 and a pair of groove walls 23, 23 that extend and protrude perpendicularly in one direction from both side edges of the groove bottom 22 and face each other at a distance. A small groove 221 for positioning a fixing screw (described later) is formed along the longitudinal direction in the widthwise center of the inner surface of the groove bottom 22, and small protrusions 222 for preventing the bottom-raising member 6a (described later) from floating up are formed along the longitudinal direction on the inner surface near the tip edge of each groove wall 23.

[0028] On the other hand, the upper inner frame member 4a and the lower inner frame member 4b that make up the shoji screen 20 are made of a first inner frame base material 4 which is an extrusion molded product of PVC resin, as shown in Figure 6, and this long first inner frame base material 4 is appropriately cut to the required length and used as the upper inner frame member 4a and the lower inner frame member 4b.

[0029] The first inner frame base material 4 has a surface material groove 41 into which the edge of the surface material 3 can be inserted, and is composed of a groove bottom 42, a pair of groove walls 43, 43 that extend perpendicularly in one direction from both side edges of the groove bottom 42 and face each other at a distance, and a guide portion 44 that is brought outward from the tip edge of the groove wall 43 on one side and extends toward the groove bottom 42. A total of two small protrusions 421 are formed along the longitudinal direction on the outer surface of the groove bottom 42 to reduce the sliding resistance of the screen 20, and a total of three small protrusions 431 are formed along the longitudinal direction on the inner surface near the tip edge of each groove wall 43 to prevent it from falling off the surface material 3.

[0030] Similarly, the left and right vertical inner frame members 5a·5a that make up the shoji screen 20 are made of a second inner frame base material 5 which is an extrusion molded product of PVC resin, as shown in Figure 7, and this long second inner frame base material 5 is cut to the required length as appropriate and used as the left and right vertical inner frame members 5a·5a.

[0031] The second inner frame base material 5 has a surface material groove 51 into which the edge of the surface material 3 can be inserted, and is composed of a groove bottom 52, a pair of groove walls 53, 53 that extend perpendicularly in one direction from both side edges of the groove bottom 52 and face each other at a distance, and a handle 54 that is brought outward from the tip edge of the groove wall 53 on one side. A total of two small protrusions 521 are formed along the longitudinal direction on the outer surface of the groove bottom 52 to improve airtightness with the outer frame 10 when the shoji screen 20 is closed, and a total of three small protrusions 531 are formed along the longitudinal direction on the inner surface near the tip edge of each groove wall 53 to prevent the shoji screen 20 from falling off the surface material 4. In addition, a number of uneven portions 532 are formed along the longitudinal direction on the outer surface on the base end side of each groove wall 53 to improve airtightness at the overlapping portion between the shoji screens 20 when the shoji screens 20 are closed. The handle portion 54 and the uneven portion 532 may be omitted.

[0032] In addition, as shown in Figures 2 and 3, the simplified inner frame 100 of this embodiment is provided with a bottom-raising member 6a that is removably inserted into the screen groove portion 21 of the lower outer frame member 2b of the outer frame 10, and within the screen groove portion 21 of the lower outer frame member 2b, the screen 20 is placed on the bottom-raising member 6a and slides on the bottom-raising member 6a.

[0033] As shown in Fig. 8, this bottom-raising member 6a is made of a bottom-raising base material 6 which is an extrusion molded product of PVC resin, and this long bottom-raising base material 6 is cut to the required length as appropriate to be used as the bottom-raising member 6a. The bottom-raising base material 6 has a U-shaped cross section and is made up of a top plate portion 61 and a pair of legs 62, 62 which extend from both side edges of the top plate portion 61 at a right angle in one direction and face each other with a gap between them.

[0034] Hereinafter, a method for constructing the simplified inner frame of this embodiment will be described with reference to Figs.

[0035] The construction method of the simplified inner frame in this embodiment mainly consists of an outer frame installation process in which an outer frame 10 is installed in the window opening, and a shoji fitting process in which a shoji screen 20 is fitted into the outer frame 10 installed by this outer frame installation process.

[0036] First, in the outer frame installation process, a corner member preparation process is performed in which a corner member 1 is prepared, and an outer frame member preparation process is performed in which an upper outer frame member 2a, a lower outer frame member 2b, and left and right vertical outer frame members 2c are prepared. The corner member preparation process is a process in which a total of four corner members 1 to be fixed to the four corners of the window opening F are prepared. The outer frame member preparation process is a process in which each of the four outer frame base materials 2 is appropriately cut to the required length according to the dimensions of the four sides of the window opening F to obtain the upper outer frame member 2a, the lower outer frame member 2b, and the left and right vertical outer frame members 2c.

[0037] Next, as shown in FIG. 9, a corner member fixing process is performed in which the corner members 1 are fixed to the four corners of the window opening F. At the upper left and right recessed corners of the window opening F, the corner members 1 are fixed in a state in which the window opening abutment surface 111 of the base portion 11 of the corner member 1 abuts against the upper side of the window opening F and the cover portion 12 abuts against the recessed corners. Similarly, at the lower left and right recessed corners of the window opening F, the corner members 1 are fixed in a state in which the window opening abutment surface 111 of the base portion 11 of the corner member 1 abuts against the lower side of the window opening F and the cover portion 12 abuts against the recessed corners. Each corner member 1 is fixed by a double-sided tape (not shown) interposed between the window opening abutment surface 111 and the window opening F. In addition to adhesive fixing by double-sided tape, other fixing means such as adhesive fixing by adhesive or screw fixing may be used.

[0038] Next, as shown in FIG. 10, a vertical outer frame member fixing process is performed to fix the vertical outer frame member 2c to the left and right sides of the window opening F. At the left side of the window opening F, both ends of the vertical outer frame member 2c are inserted between a pair of cover parts 12 of the upper and lower corner members 1, respectively, and the outer surface of the groove bottom 22 is abutted against the left side of the window opening F to fix the vertical outer frame member 2c. Similarly, at the right side of the window opening F, both ends of the vertical outer frame member 2c are inserted between a pair of cover parts 12 of the upper and lower corner members 1, respectively, and the outer surface of the groove bottom 22 is abutted against the right side of the window opening F to fix the vertical outer frame member 2c. Each vertical outer frame member 2c is fixed by a fixing screw (not shown). At this time, by inserting the tip of the fixing screw into the small groove part 221 formed on the inner surface of the groove bottom part 22 of the vertical outer frame member 2c, the tip of the fixing screw can be easily positioned at the center of the width direction of the groove bottom part 22, and the screw fastening work can be performed stably and easily. In addition to fixing with fixing screws, other fixing means such as adhesive fixing with an adhesive may be used.

[0039] In addition, in this embodiment, when fixing the vertical outer frame member 2c, the lower end of the vertical outer frame member 2c is placed on the first outer frame member abutment surface 112 of the base portion 11 of the lower corner member 1, and a gap S1 is provided between the upper end of the vertical outer frame member 2c and the first outer frame member abutment surface 112 of the base portion 11 of the upper corner member 1. This allows the fixing work of the vertical outer frame member 2c to be performed stably and easily. The gap with the base portion 11 of the corner member 1 may be provided only at the lower end of the vertical outer frame member 2c, or at both upper and lower ends. Also, it is not necessary to provide a gap at both upper and lower ends of the vertical outer frame member 2c.

[0040] Next, as shown in Fig. 11, an upper and lower outer frame member fixing process is performed in which an upper outer frame member 2a and a lower outer frame member 2b are fixed to the upper and lower sides of a window opening F. At the upper side of the window opening F, both ends of the upper outer frame member 2a are inserted between the pair of cover parts 12 of the left and right corner members 1, and the outer surface of the groove bottom 22 is brought into contact with the upper side of the window opening F and the upper outer frame member 2a is fixed with fixing screws (not shown). Similarly, at the lower side of the window opening F, both ends of the lower outer frame member 2b are inserted between the pair of cover parts 12 of the left and right corner members 1, and the outer surface of the groove bottom 22 is brought into contact with the lower side of the window opening F and the lower outer frame member 2b is fixed with fixing screws (not shown).

[0041] In this embodiment, when the upper outer frame member 2a and the lower outer frame member 2b are fixed, the left ends of the upper outer frame member 2a and the lower outer frame member 2b are abutted against the second outer frame member abutment surface 113 of the base portion 11 of the left corner member 1, and a gap S2 is provided between the right ends of the upper outer frame member 2a and the lower outer frame member 2b and the second outer frame member abutment surface 113 of the base portion 11 of the right corner member 1. This allows the upper outer frame member 2a and the lower outer frame member 2b to be fixed stably and easily. The gap between the corner member 1 and the base portion 11 may be provided only at the left end of the upper outer frame member 2a or the lower outer frame member 2b, or may be provided at both left and right ends. Also, it is not necessary to provide a gap at both left and right ends of the upper outer frame member 2a or the lower outer frame member 2b.

[0042] By performing the outer frame installation process, which consists of a corner member preparation process, an outer frame member preparation process, a corner member fixing process, a vertical outer frame member fixing process, and an upper and lower outer frame member fixing process, the outer frame 10 is installed in the window opening F as shown in Figure 12.

[0043] Next, a shoji fitting process is performed in which the shoji 20 is fitted into the outer frame 10 installed in the window opening F.

[0044] First, prior to the screen fitting process, a panel preparation process is carried out to prepare the panel 3 that constitutes the screen 20, an inner frame member preparation process is carried out to prepare the upper inner frame member 4a, the lower inner frame member 4b, and the left and right vertical inner frame members 5a / 5a that also constitute the screen 20, and a bottom-raising member preparation process is carried out to prepare the bottom-raising member 6a.

[0045] The face material preparation process is a process in which a flat plate base material made of a PC resin molded product is appropriately cut according to the dimensions of the outer frame 10 to obtain a face material 3 of the required size. The inner frame member preparation process is a process in which the long first inner frame base material 4 and second inner frame base material 5 are appropriately cut to the required length according to the dimensions of the four sides of the face material 3 to obtain the upper inner frame member 4a, the lower inner frame member 4b, and the left and right vertical inner frame members 5a, 5a. The bottom-raising member preparation process is a process in which the long bottom-raising base material 6 is appropriately cut to the required length according to the dimensions of the lower outer frame member 2b of the outer frame 10 to obtain the bottom-raising member 6a.

[0046] Next, as shown in Figure 13, the shoji assembling process is performed in which the upper inner frame member 4a, the lower inner frame member 4b, and the left and right vertical inner frame members 5a, 5a are fixed to the four sides of the panel material 3, respectively, to assemble the panel material 20. Each inner frame member is fixed by inserting the edge of the panel material 3 into the panel material grooves 41, 51 of each inner frame member. Small protrusions 431, 531 formed in each panel material groove 41, 51 prevent each inner frame member from falling off the panel material 3. The panel material 3 and each inner frame member may be bonded and fixed with an adhesive.

[0047] A pair of sliding screens 20·20 is constructed by this sliding screen assembly process. In this embodiment, of the pair of sliding screens 20·20, the handle portions 54 of the left and right vertical inner frame members 5a of the indoor screen 20 are oriented in the same direction as the guide portions 44 of the upper inner frame member 4a and the lower inner frame member 4b as shown in Fig. 13, but the handle portions 54 of one vertical inner frame member 5a of the outdoor screen are oriented opposite to the handle portions 54 of the other vertical inner frame member 5a and the guide portions 44 of the upper inner frame member 4a and the lower inner frame member 4b. The orientation of the handle portions 54 relative to the guide portions 44 can be appropriately changed as necessary.

[0048] Next, as shown in Fig. 14, a bottom-raising member installation process is performed in which the bottom-raising member 6a is installed in the shoji groove portion 21 of the lower outer frame member 2b of the outer frame 10. The bottom-raising member 6a is installed by removably fitting it into the shoji groove portion 21 with the top plate portion 61 facing upward. The small protrusions 222 formed in the shoji groove portion 21 of the lower outer frame member 2b can prevent the bottom-raising member 6a from floating up when the shoji 20 slides.

[0049] Then, as shown in FIG. 14, a shoji fitting process is performed to fit a pair of shoji 20 into the outer frame 10. The fitting work of each shoji 20 is basically performed by the usual Kendon method. First, while engaging the guide portion 44 of the upper inner frame member 4a of the shoji 20 with the outer surface of one of the groove wall portions 23 of the upper outer frame member 2a of the outer frame 10, the upper side of the shoji 20 is inserted deeply into the shoji groove portion 21 of the upper outer frame member 2a of the outer frame 10. Next, the lower side of the shoji 20 is positioned directly above the shoji groove portion 21 of the lower outer frame member 2b of the outer frame 10. Then, while engaging the guide portion 44 of the lower inner frame member 4b of the shoji 20 with the outer surface of one of the groove wall portions 23 of the lower outer frame member 2b of the outer frame 10, the entire shoji 20 is dropped downward, and the shoji 20 is placed on the bottom raising member 6a within the shoji groove portion 21 of the lower outer frame member 2b.

[0050] By performing this shoji fitting process for each pair of shoji screens 20 / 20, the pair of sliding shoji screens 20 / 20 are fitted into the outer frame 10 so that they can slide freely, and the simple inner window 100 of this embodiment is installed in the existing window opening F as shown in Figures 1 to 3.

[0051] According to the construction method for the simple inner window of this embodiment, when installing the outer frame 10 in an existing window opening F, the corner member 1 is fixed individually to the inside corner of the window opening F, and the upper outer frame member 2a, the lower outer frame member 2b, and the left and right vertical outer frame members 2c are each fixed individually to the four sides of the window opening F. Therefore, unlike the conventional construction method in which a pre-framed outer frame was installed in the window opening, it does not require a great deal of effort to install the outer frame, and even an amateur can easily install the simple inner window.

[0052] Moreover, with the cover portion 12 of each corner member 1 abutting the inside corner portion of the window opening F, the corner members 1 are fixed directly to the four corners of the window opening F, and with both ends of the upper outer frame member 2a, the lower outer frame member 2b, and the left and right vertical outer frame members 2c inserted between the pair of cover portions 12 of each corner member 1, each outer frame member is fixed directly to the four sides of the window opening F, so that the outer frame 10 can be installed with almost no gaps against the window opening F. Therefore, unlike conventional installation methods in which the outer frame was precisely framed to match the dimensions of the window opening to reduce the gap with the window opening, skilled techniques are not required to install the outer frame, and a simplified inner window can be easily installed.

[0053] Furthermore, according to the construction method for the simplified inner window of this embodiment, both ends of the upper outer frame member 2a, the lower outer frame member 2b, and the left and right vertical outer frame members 2c are inserted between the pair of cover parts 12 of each corner member 1, so that both ends of each outer frame member can be hidden by the cover parts 12, and even if there is a gap between each outer frame member, it can be hidden by the cover parts 12 and the appearance of the outer frame 10 is not marred by this gap. Therefore, it is not necessary to prepare each outer frame member with a length that is strictly matched to the dimensions of the window opening F, which also makes it possible to easily construct the simplified inner window.

[0054] In addition, in the simplified inner window 100 of this embodiment, both ends of the upper outer frame member 2a, the lower outer frame member 2b, and the left and right vertical outer frame members 2c of the outer frame 10 are simply inserted between the pair of cover parts 12 of each corner member 1, and the outer frame members are not connected and fixed to each other or to the corner members 1. Therefore, even if thermal expansion and contraction occurs in each outer frame member or the window opening F due to temperature change after construction, the outer frame members will not bend and the outer frame 10 will not be distorted, and there is no risk of causing problems with opening and closing the shoji screen 20. Even if each outer frame member is made of a synthetic resin material that is lightweight but has relatively large thermal expansion and contraction, as in the simplified inner window 100 of this embodiment, it can be suitably used as a simplified inner window for a bathroom where temperature changes are large, for example.

[0055] In addition, the simple inner window 100 of this embodiment is designed so that gaps (S1, S2) are provided between at least one end of the upper outer frame member 2a, the lower outer frame member 2b, and the left and right vertical outer frame members 2c and the base portion 11 of each corner member 1 between a pair of cover portions 12 of each corner member 1, thereby more effectively responding to distortion due to temperature changes and making it easier to install the outer frame.

[0056] In addition, in the simplified inner window 100 of this embodiment, a first outer frame member abutment surface 112 and a second outer frame member abutment surface 113 are formed on the base portion 11 of the corner member 1, so that during the outer frame installation work, the ends of each outer frame member can be stably abutted against the first outer frame member abutment surface 112 or the second outer frame member abutment surface 113 as necessary, each outer frame member can be easily positioned, and the outer frame installation work can be performed stably and easily.

[0057] Furthermore, in the simplified inner window 100 of this embodiment, the pair of second outer frame member abutment surfaces 113 and the pair of cover portions 12 of the corner member 1 are formed symmetrically with respect to the imaginary central plane P, so that when fixing the corner members 1 to each of the four corners of the window opening F, each corner member 1 can be positioned in the correct posture simply by orienting the pair of cover portions 12 forward and backward and abutting the base portion 11 against the edge of the window opening F to be fixed, which also makes it possible to perform the outer frame installation work stably and easily.

[0058] Although the simplified inner window 100 of this embodiment and its installation method have been described above, the present invention can also be implemented in other embodiments.

[0059] For example, in the above embodiment, as shown in FIG. 11, in the upper and lower outer frame member fixing step of the construction method for a simplified inner window, when the upper outer frame member 2a and the lower outer frame member 2b are fixed, the left end portions of the upper outer frame member 2a and the lower outer frame member 2b are abutted against the second outer frame member abutment surface 113 of the base portion 11 of the left corner member 1, and a gap S2 is provided between the right end portions of the upper outer frame member 2a and the lower outer frame member 2b and the second outer frame member abutment surface 113 of the base portion 11 of the right corner member 1, but the present invention is by no means limited to this. However, when, for example, the visible width of each outer frame member is larger than that of the above embodiment, and the leading edges of the groove wall portions 23 of the left and right vertical outer frame members 2c-2c protrude inwardly into the window opening beyond the second outer frame member abutment surface 113 of the base portion 11 of the corner member 1, the left end portions of the upper outer frame member 2a and the lower outer frame member 2b may be abutted against the leading edge of the groove wall portion 23 of the left vertical outer frame member 2c, and a gap may be provided between the right end portions of the upper outer frame member 2a and the lower outer frame member 2b and the leading edge of the groove wall portion 23 of the right vertical outer frame member 2c.

[0060] In addition, in the above embodiment, as shown in Figure 11, at the corners of the outer frame 10, the both ends of the left and right vertical outer frame members 2c / 2c are given priority over the both ends of the upper outer frame member 2a and the lower outer frame member 2b, thereby forming a so-called "vertically dominant" outer frame 10. However, the present invention is by no means limited to this, and it is also possible to form a so-called "horizontally dominant" outer frame in which the both ends of the upper outer frame member 2a and the lower outer frame member 2b are given priority over the both ends of the left and right vertical outer frame members 2c / 2c at the corners of the outer frame.

[0061] When constructing this "horizontal" outer frame, the outer frame installation process involves performing a corner member fixing process, followed by an upper and lower outer frame member fixing process in which the upper outer frame member 2a and the lower outer frame member 2b are fixed to the upper and lower edges of the window opening F, respectively, and then a vertical outer frame member fixing process in which the vertical outer frame members 2c / 2c are fixed to the left and right edges of the window opening F, respectively.

[0062] Furthermore, when constructing this "horizontal" outer frame, in the corner member fixing step, it is preferable to fix the window opening abutment surfaces 111 of the base portions 11 of each corner member 1 by abutting them against the left and right sides of the window opening F, respectively. At this time, the lower ends of the left and right vertical outer frame members 2c / 2c may be placed on the leading edge of the groove wall portion 23 of the previously fixed lower outer frame member 2b, and a gap may be provided between the upper ends of the left and right vertical outer frame members 2c / 2c and the leading edge of the groove wall portion 23 of the upper outer frame member 2a.

[0063] Furthermore, in the above embodiment, in the outer frame installation process, a corner member fixing process is performed, followed by a vertical outer frame member fixing process and an upper and lower outer frame member fixing process. However, the present invention is by no means limited to this, and for example, as shown in Figures 15 to 17, a corner member fixing process may be performed after the vertical outer frame member fixing process, and then a upper and lower outer frame member fixing process may be performed.

[0064] Specifically, as shown in Figure 15, in the outer frame installation process, first, the left and right vertical outer frame members 2c·2c are fixed to the left and right sides of the window opening F, respectively. At this time, gaps are left between both ends of each vertical outer frame member 2c and the upper and lower sides of the window opening F to allow the base parts 11 of the corner members 1 to be inserted.

[0065] Next, as shown in Figure 16, the cover parts 12 of the corner members 1 are abutted against the inside corners of the window opening F, and each corner member 1 is fixed to the four corners of the window opening F with both ends of the left and right vertical outer frame members 2c·2c that were previously fixed inserted between the pair of cover parts 11.

[0066] 17, both ends of the upper outer frame member 2a and the lower outer frame member 2b are inserted between a pair of cover parts 12 of each corner member 1 fixed to the four corners of the window opening F, and the upper outer frame member 2a and the lower outer frame member 2b are then fixed to the top and bottom edges of the window opening F. Through these steps, a "vertical opening" outer frame 10 can be formed.

[0067] Also, in the outer frame setting step, as shown in Figs. 18 to 20, after the upper and lower outer frame member fixing step, the corner member fixing step may be performed, and then the vertical outer frame member fixing step may be performed.

[0068] 18, in the outer frame installation step, first, the upper outer frame member 2a and the lower outer frame member 2b are fixed to the upper and lower sides of the window opening F. At this time, gaps are provided between both ends of the upper outer frame member 2a and the lower outer frame member 2b and the left and right sides of the window opening F for inserting the base portion 11 of the corner member 1.

[0069] 19, the cover parts 12 of the corner members 1 are brought into contact with the inside corners of the window opening F, and with both ends of the upper outer frame member 2a and the lower outer frame member 2b that were previously fixed inserted between the pair of cover parts 11, each corner member 1 is fixed to the four corners of the window opening F. At this time, the window opening abutment surfaces 111 of the base parts 11 of each corner member 1 are abutted against the left and right sides of the window opening F and fixed.

[0070] Then, as shown in Figure 20, with both ends of the left and right vertical outer frame members 2c·2c inserted between the pair of cover parts 12 of each corner member 1 fixed to the four corners of the window opening F, each vertical outer frame member 2c is fixed to the left and right sides of the window opening F. Through these steps, a "horizontally-opening" outer frame 10 can be formed.

[0071] In addition, in the above embodiment, the cross-sectional shapes of the upper outer frame member 2a, the lower outer frame member 2b, and the left and right vertical outer frame members 2c that constitute the outer frame 10 are made identical to make each outer frame member standard, but the present invention is not limited to this, and the cross-sectional shapes of each outer frame member may be different.

[0072] For example, as shown in Fig. 21, a partition protrusion 24 for separating a pair of sliding shoji screens 50-50 may be provided in a shoji screen groove 21 into which a shoji screen can be fitted in a lower outer frame member 7b or an upper outer frame member constituting the outer frame. Also, as shown in Fig. 22, a pair of rail protrusions 25-25 along which rollers (not shown) of roller-equipped shoji screens 60-60 can run may be provided in a shoji screen groove 21 in a lower outer frame member 8b. In this way, it is sufficient for the upper outer frame member 2a, the lower outer frame member 2b, and the left and right vertical outer frame members 2c to have shoji screen grooves into which various shoji screens can be slidably fitted, and the cross-sectional shape of each outer frame member can be modified in various ways.

[0073] The present invention may be embodied in various other forms that include improvements, modifications, and variations based on the knowledge of a person skilled in the art, without departing from the spirit of the present invention. In addition, the present invention may be embodied in a form in which any of the invention-specifying matters is replaced with other techniques within the scope of the same action or effect, and an invention-specifying matter that is integrally configured may be composed of multiple members, or an invention-specifying matter that is composed of multiple members may be embodied in a form in which it is integrally configured. [Explanation of symbols]

[0074] 100 Simple inner window 10 Outer Frame 1 Corner parts 11 Base 111 Window opening abutment surface 112 first outer frame member abutment surface 113 Second outer frame member abutment surface 12 Cover part 2a Upper outer frame member 2b, 7b, 8b Lower outer frame members 2c Vertical outer frame member 20 Shoji Screen F Window opening S1, S2 gap C center P Virtual center plane

Claims

1. A simple inner window that is added to the interior side of an existing outer window in a rectangular window opening of a building. The method includes the steps of: (a) providing a window opening with a frame; and (b) providing a sliding door with a frame. The outer frame is a corner member including a base portion fixed to an inside corner portion of the window opening, and a pair of cover portions extending from the base portion and facing each other with a gap therebetween; The window opening is provided with an upper outer frame member, a lower outer frame member, and left and right vertical outer frame members, each of which is fixed to each of the four sides of the window opening. the corner members are fixed to the four corners of the window opening with the cover portions of the corner members abutting against the recessed corner portions of the window opening, A simplified inner window characterized in that the upper outer frame member, lower outer frame member, and left and right vertical outer frame members are fixed to the four sides of the window opening with both end portions of the upper outer frame member, lower outer frame member, and left and right vertical outer frame members inserted between a pair of cover portions of each corner member fixed to the four corners of the window opening.

2. Between the pair of cover portions of each of the corner members, A gap is provided between at least one end of the upper outer frame member or the lower outer frame member and the base portion of the corner member or the left and right vertical outer frame members, or A simple inner window as described in claim 1, characterized in that there is a gap between at least one end of the left and right vertical outer frame members and the base portion of the corner member, the upper outer frame member, or the lower outer frame member.

3. The base portion of the corner member is formed into a rectangular plate shape having a constant thickness, The cover portion is provided so as to protrude perpendicularly in one direction from each of both side edges of the base portion, a window opening abutment surface that abuts against the window opening is formed on one plate surface of the base portion opposite to a protruding direction of the cover portion, A simple inner window as described in claim 1 or claim 2, characterized in that a first outer frame member abutment surface capable of abutting against the ends of the upper outer frame member, the lower outer frame member, or the left and right vertical outer frame members is formed on the other plate surface on the protruding direction side of the cover portion of the base portion.

4. A second outer frame member abutment surface that can abut against an end of the upper outer frame member, the lower outer frame member, or the left and right vertical outer frame members is formed on at least one thickness surface of both end edges perpendicular to the side edge of the base portion, 4. A simplified inner window as described in claim 3, wherein the cover portion protrudes outward beyond the abutment surface of the second outer frame member.

5. A simple inner window as described in claim 4, characterized in that a pair of second outer frame member abutment surfaces and a pair of cover portions formed on the thickness surfaces of both end edges of the base portion are formed symmetrically with respect to a virtual center plane that passes through the center of the plate surface of the base portion 11, is perpendicular to the plate surface, and is parallel to both end edges.

6. A method for installing a simple inner window on the interior side of an existing outer window in a rectangular window opening of a building, comprising the steps of: a frame installation step of installing a frame around the window opening; A shoji fitting process of fitting a shoji into the outer frame installed by the outer frame installation process; Including, The outer frame installation step includes: a corner member preparing step of preparing a corner member including a base portion fixed to an inside corner portion of the window opening and a pair of cover portions extending from the base portion and facing each other with a space therebetween; a frame member preparation process for preparing an upper outer frame member, a lower outer frame member, and left and right vertical outer frame members to be fixed to the four sides of the window opening, respectively; a corner member fixing step of fixing the corner member to the four corners of the window opening in a state in which the cover portion of the corner member is abutted against the recessed corner portion of the window opening; a vertical outer frame member fixing process for fixing the left and right vertical outer frame members to the left and right sides of the window opening in a state in which both end portions of the left and right vertical outer frame members are inserted between a pair of the cover portions of each of the corner members fixed to the four corners of the window opening; an upper and lower outer frame member fixing process for fixing the upper outer frame member and the lower outer frame member to the upper and lower sides of the window opening in a state in which both end portions of the upper outer frame member and the lower outer frame member are inserted between the pair of cover portions of each of the corner members fixed to the four corners of the window opening; A method for installing a simple interior window, comprising:

7. A method for installing a simple inner window on the interior side of an existing outer window in a rectangular window opening of a building, comprising the steps of: a frame installation step of installing a frame around the window opening; A shoji fitting process of fitting a shoji into the outer frame installed by the outer frame installation process; Including, The outer frame installation step includes: a corner member preparing step of preparing a corner member including a base portion fixed to an inside corner portion of the window opening and a pair of cover portions extending from the base portion and facing each other with a space therebetween; a frame member preparation process for preparing an upper outer frame member, a lower outer frame member, and left and right vertical outer frame members to be fixed to the four sides of the window opening, respectively; a vertical outer frame member fixing process for fixing the left and right vertical outer frame members to the left and right sides of the window opening; a corner member fixing process for fixing the corner members to the four corners of the window opening in a state in which the cover portions of the corner members are abutted against the recessed corner portions of the window opening and both ends of the left and right vertical outer frame members fixed to the left and right sides of the window opening are inserted between the pair of cover portions; an upper and lower outer frame member fixing process for fixing the upper outer frame member and the lower outer frame member to the upper and lower sides of the window opening in a state in which both end portions of the upper outer frame member and the lower outer frame member are inserted between the pair of cover portions of each of the corner members fixed to the four corners of the window opening; A method for installing a simple interior window, comprising:

8. A method for installing a simple inner window on the interior side of an existing outer window in a rectangular window opening of a building, comprising the steps of: a frame installation step of installing a frame around the window opening; A shoji fitting process of fitting a shoji into the outer frame installed by the outer frame installation process; Including, The outer frame installation step includes: a corner member preparing step of preparing a corner member including a base portion fixed to an inside corner portion of the window opening and a pair of cover portions extending from the base portion and facing each other with a space therebetween; a frame member preparation process for preparing an upper outer frame member, a lower outer frame member, and left and right vertical outer frame members to be fixed to the four sides of the window opening, respectively; an upper and lower outer frame member fixing step of fixing the upper outer frame member and the lower outer frame member to upper and lower edges of the window opening; a corner member fixing process for fixing the corner members to the four corners of the window opening in a state in which the cover portions of the corner members are brought into contact with the recessed corner portions of the window opening and both ends of the upper outer frame member and the lower outer frame member fixed to the upper and lower sides of the window opening are inserted between the pair of cover portions; a vertical outer frame member fixing process for fixing the left and right vertical outer frame members to the left and right sides of the window opening in a state in which both end portions of the left and right vertical outer frame members are inserted between a pair of the cover portions of each of the corner members fixed to the four corners of the window opening; A method for installing a simple interior window, comprising:

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