JP4733518B2 - Sash mounting structure and sash mounting method - Google Patents

Description

  The present invention relates to a sash mounting structure and a sash mounting method for adding a new sash (for example, a double sash) to the outside of an existing sash (for example, a single sash) instead of an existing sash.

  In recent years, the use of a sash structure for a window has been increasing for sound insulation and airtightness maintenance.

  When the sash is used as, for example, a soundproof sash, a sash that can shield the noise after the surrounding noise is measured in advance is selected.

  However, even if the surrounding environment has changed after installing the sash, that is, if the noise increases due to an increase in traffic volume or new construction of roads (especially expressways) It has been difficult to replace a sash once installed with a new sash.

For this reason, Patent Document 1 proposes a method of adding a new sash outside the existing sash as a measure for coping with such environmental changes.
JP 2002-106261 A

  However, since the method described in Patent Document 1 is to add a new sash while the existing sash is installed as it is, it requires a considerable space outside the existing sash. When space is limited, it may be impossible to add a new sash.

  The present invention has been made in view of such problems, and a sash mounting structure and a sash mounting method for minimizing the space required for adding a new sash when a new sash is added. The purpose is to provide.

  Hereinafter, means for solving the above-described problems will be described using reference numerals used in the “Embodiments of the Invention”. These reference signs are added only to clarify the correspondence between the description of “Claims” and the description of “Embodiments of the Invention”. It should not be used to interpret the technical scope of the invention described in.

In order to achieve the above object, the present invention provides a sash mounting structure in which an external sash (130) is added to the outdoor side of an existing sash. (102) Of the right frame (103) and the left frame (104), the upper frame (101), the right frame (103) and the left frame (104) have a U-shaped cross-section in the first auxiliary member (110) are respectively fitted to form a flat surface (111), and the first auxiliary member (110) is integrally provided with a protruding portion (150) protruding outward from a part of the flat surface (111). It is to form, on the lower frame (102), attaching a second auxiliary member having a height not lower (120) than the rail (106) which has been formed in the lower frame (102), the outer Supporting the attached sash (130) A support frame (131), the support frame (131) the first in the said projecting portion so as to be in contact with the flat surface (111) outdoor side than the (150) of the outer peripheral surface the first auxiliary member (110) of Attached to the auxiliary member (110) and attached to the second auxiliary member (120), and viewed from the indoor side , the outer peripheral surface of the support frame (131) is made to be the first auxiliary member by the protrusion (150). A sash mounting structure is provided in which a connection region in contact with the flat surface (111) of (110) is covered.

  A heat insulating material (140) is preferably embedded in at least one of the upper frame (101), the right frame (103), and the left frame (104).

  It is preferable that the decorative board (141) which hides the connection area | region of the sash frame of the said existing sash and said 1st auxiliary member (110) is attached from the indoor side.

  The first auxiliary member (110) is placed on the upper frame (101), the right frame (103) and the left frame (104) so that the side surface (112a) of the first auxiliary member (110) can be seen from the indoor side. It is preferable to fit in at least one of them.

  It is preferable that a waterproof seal (142) for sealing a connection region between the support frame of the external sash (130) and the first auxiliary member (110) is attached from the outdoor side.

  The first auxiliary member (110) is preferably made of aluminum, for example, and the surface thereof is preferably coated with a resin (151).

The present invention further includes a first step of removing the existing sash, and an upper frame ( 101), the lower frame (102), the right frame (103), and the left frame (104), the upper frame (101), the right frame (103), and the left frame (104) have a U-shaped cross section. Each of the first auxiliary members (110), and a second step of forming the flat surface (111), and the rail (106) formed on the lower frame (102) on the lower frame (102). A third step of attaching a second auxiliary member (120) having a height not too low, and a support frame (131) supporting the external sash (130), an outer peripheral surface of the support frame (131) The first auxiliary member (110) Wherein mounted on said first auxiliary member (110) so as to be in contact with the flat surface (111), and a fourth step of attaching the second auxiliary member (120), wherein the first auxiliary member (110) Is integrally formed with a protrusion (150) protruding outward from a part of the flat surface (111), and in the fourth step, the support frame (131) is formed of the protrusion. (150) is attached to the first auxiliary member (110) on the outdoor side, and viewed from the indoor side, the protrusion (150) causes the outer peripheral surface of the support frame (131) to be the first auxiliary member ( 110) A method for attaching a sash, characterized in that a connection region in contact with the flat surface (111) is covered .

  The method for attaching a sash according to the present invention further includes a step of embedding a heat insulating material (140) in at least one of the upper frame (101), the right frame (103), and the left frame (104). Is preferred.

  The method for attaching a sash according to the present invention preferably further includes a step of attaching a decorative plate (141) for concealing a connection region between the sash frame of the existing sash and the first auxiliary member (110) from the indoor side.

  The method for attaching a sash according to the present invention further includes a step of attaching a waterproof seal (142) for sealing a connection region between the sash frame of the external sash (130) and the first auxiliary member (110) from the outdoor side. It is preferable.

  In the second step, the first auxiliary member (110) is attached to the upper frame (101), the right frame (103) and the first auxiliary member (110) so that the side surface (112a) of the first auxiliary member (110) can be seen from the indoor side. It is preferable to fit in at least one of the left frame (104).

  According to the sash mounting structure or the sash mounting method according to the present invention, for example, a single sash can be easily replaced with a double sash. At this time, since the external sash is attached after the existing sash is removed, it is not necessary to occupy a larger space than necessary, and the attachment area of the sash can be made compact.

  Furthermore, by embedding a heat insulating material in at least one of the upper frame, the right frame, and the left frame, the heat insulating performance on the indoor side with respect to the outdoor side can be enhanced.

  Moreover, the external appearance from the indoor side of an external sash can be improved by attaching a decorative board.

  Further, by attaching a waterproof seal, rain and other moisture can be prevented from entering the indoor side from the outdoor side.

  Furthermore, since the projection area is formed on the first auxiliary member, the connection area between the first auxiliary member and the support frame of the external sash is covered, so that a gap formed between the support frame and the upper frame. Will also be covered by the protrusion, and the gap will not be visible from the indoor side.

[First embodiment]
FIG. 1 is a longitudinal sectional view of a sash mounting structure according to the first embodiment of the present invention, and FIG. 2 is a transverse sectional view of the sash mounting structure according to the first embodiment of the present invention.

  In the sash mounting structure according to the present embodiment, the existing sash is removed, and a new sash is added to the outside of the existing sash.

  As shown in FIG. 1, among the upper frame 101, the lower frame 102, the right frame 103 (see FIG. 2), and the left frame 104 (see FIG. 2) constituting the sash frame of the removed existing sash (not shown). The sash rails 105 and 106 formed in the upper frame 101 and the lower frame 102 extend in the horizontal direction, and the sash positioning members 107 and 108 formed in the right frame 103 and the left frame 104 are in the vertical direction. It extends.

  As shown in FIGS. 1 and 2, a first auxiliary member 110 having a U-shaped cross section is fitted into the upper frame 101, the right frame 103, and the left frame 104, respectively.

  FIG. 3 is a perspective view of the first auxiliary member 110.

  As shown in FIG. 3, the first auxiliary member 110 includes a flat surface 111 and side surfaces 112 extending perpendicularly to the flat surface 111 from both ends of the flat surface 111, and has a longitudinal section (a section perpendicular to the longitudinal direction). Is in the shape of a “U”.

  A plurality of screw holes 113 in which screw grooves are cut are arranged in a straight line on each side surface 112, and after the first auxiliary member 110 is fitted into the upper frame 101, the right frame 103, and the left frame 104, The first auxiliary member 110 is fixed with screws 115 from the outside of the upper frame 101, the right frame 103, and the left frame 104.

  Further, a plurality of screw holes 114 in which screw grooves are cut are formed on the flat surface 111 in a straight line in the longitudinal direction. As will be described later, a sash frame of a new sash is fixed to the screw hole 114 via a screw. The screw hole 114 is provided at a position closer to the outdoor side than the center line of the first auxiliary member 110.

  The first auxiliary member 110 attached to the right frame 103 and the left frame 104 is necessarily provided with a screw hole 114, but the first auxiliary member 110 attached to the upper frame 101 has a screw hole. 114 is not necessarily provided.

  By fitting the first auxiliary member 110 into the upper frame 101, the right frame 103, and the left frame 104, the sash rail 105 and the positioning members 107 and 108 are hidden inside the first auxiliary member 110. Only the flat surface 111 of the member 110 appears.

  Further, a second auxiliary member 120 higher than the rail 106 formed on the lower frame 102 is attached to the lower frame 102.

  FIG. 4 is a perspective view of the second auxiliary member 120.

  As shown in FIG. 4, the second auxiliary member 120 includes a bottom surface 121 and a side surface 122 extending perpendicularly from one end of the bottom surface 121 to the bottom surface 121, and generally forms an “L” shape. Yes.

  A plurality of through holes 123 are formed on the bottom surface 121 in a straight line. Similarly, a plurality of through holes 124 are formed on the side surface 122 in a straight line.

  The second auxiliary member 120 is fixed to the lower frame 102 by screwing a screw 125 to the lower frame 102 through the through hole 123.

As shown in FIG. 1 , in a state where the second auxiliary member 120 is fixed to the bottom surface of the lower frame 102, the side surface 122 has a height that is higher than the rail 106 formed on the lower frame 102. Yes.

  FIG. 5 is a flowchart showing each process for completing the sash mounting structure according to the present embodiment.

  Hereinafter, with reference to FIG. 5, the manufacturing process of the sash attachment structure which concerns on this embodiment is demonstrated.

  First, an existing sash (not shown) is removed from the window (step S101).

  Next, the first auxiliary member 110 is fitted into the upper frame 101, the right frame 103, and the left frame 104, and fixed through the screws 115 (step S102). As a result, only the flat surface 111 of the first auxiliary member 110 appears on the upper frame 101, the right frame 103, and the left frame 104.

  Next, the second auxiliary member 120 is fixed to the lower frame 102 via the screw 125 (step S103).

  The order of attaching the first auxiliary member 110 (step S102) and attaching the second auxiliary member 120 (step S103) is not limited to this order, and may be reversed.

  Next, the support frame 131 supporting the additional external sash 130 is fixed to the first auxiliary member 110 and the second auxiliary member 120 (step S104).

  The external sash 130 is fixed to the first auxiliary member 110 by screwing a screw 126 into a screw hole 114 provided in the flat surface 111 of the first auxiliary member 110 at an upper portion thereof.

  Further, the external sash 130 has a screw 127 passed through a through-hole 124 provided in the side surface 122 of the second auxiliary member 120 at a lower portion thereof, and further, screw holes ( The second auxiliary member 120 is fixed to the second auxiliary member 120 by screwing it (not shown).

  As a result, the external sash 130 is attached to the outside of the existing sash that has already been removed. The size of the external sash 130 is smaller than the size of the existing sash.

  As described above, according to the sash mounting structure according to the present embodiment, for example, a single sash can be easily replaced with a double sash. At this time, since the external sash 130 is attached after the existing sash is removed, it is not necessary to occupy a larger space than necessary, and the attachment area of the sash can be made compact.

  Note that the sash mounting structure according to the present embodiment is not limited to the above-described configuration, and various modifications can be made. Examples thereof will be described below.

  For example, as shown in FIG. 1 and FIG. 2, the space formed between the rails 105 of the upper frame 101 before the first auxiliary member 110 is fitted into the upper frame 101, the right frame 103, and the left frame 104. The heat insulating material 140 can be embedded in the space formed by the positioning members 107 and 108 of the right frame 103 and the left frame 104. The first auxiliary member 110 is fitted into the upper frame 101, the right frame 103, and the left frame 104 after embedding the heat insulating material 140.

  Thus, by embedding the heat insulating material 140 in the upper frame 101, the right frame 103, and the left frame 104, the heat insulating performance on the indoor side with respect to the outdoor side can be enhanced.

  Note that the heat insulating material 140 is not necessarily embedded in all of the upper frame 101, the right frame 103, and the left frame 104, and can be embedded in any one or two of them.

  Further, the heat insulating material 140 can be embedded in the lower frame 102.

  Also, as shown in FIGS. 1 and 2, after the first auxiliary member 110 is fitted into the upper frame 101, the right frame 103, and the left frame 104, the first auxiliary member 110, the upper frame 101, the right frame 103, and the left It is also possible to attach the decorative board 141 from the indoor side to hide the connection area with the frame 104.

  The decorative board 141 can be attached by, for example, screwing it to the support frame 131 of the external sash 130. Alternatively, the decorative plate 141 can be fixed to the first auxiliary member 110.

  By attaching the decorative plate 141 in this manner, the appearance of the external sash 130 from the indoor side can be improved.

  It is also possible to attach a waterproof seal 142 that seals the connection region between the support frame 131 of the external sash 130 and the first auxiliary member 110 from the outdoor side.

  Since the second auxiliary member 120 is not exposed to the outdoor side, the waterproof seal 142 is directly attached to the support frame 131 of the external sash 130 with respect to the lower frame 102.

  The waterproof seal 142 is attached to the upper frame 101, the right frame 103, and the left frame 104 via screws 143, for example. Alternatively, the waterproof seal 142 can be attached to the support frame 131 of the external sash 130.

  By attaching the waterproof seal 142, rain and other moisture can be prevented from entering the indoor side from the outdoor side.

[Second Embodiment]
FIG. 6 is a longitudinal sectional view of a sash mounting structure according to the second embodiment of the present invention, and FIG. 7 is a transverse sectional view of a sash mounting structure according to the second embodiment of the present invention.

  In the present embodiment, as shown in FIG. 7, the shapes of the right frame 103 and the left frame 104 of the existing sash are different from the shapes of the right frame 103 and the left frame 104 (see FIG. 2) in the first embodiment. Yes. That is, unlike the right frame 103 and the left frame 104 in the first embodiment, the right frame 103 and the left frame 104 in the present embodiment constitute protruding flat surfaces 103A and 104A in a part thereof.

  For this reason, the width of the first auxiliary member 110A fitted in the right frame 103 (the length in the direction orthogonal to the longitudinal direction) is shorter than the width of the first auxiliary member 110 in the first embodiment. When the first auxiliary member 110A is fitted into the right frame 103, the flat surface 111 of the first auxiliary member 110A is flush with the flat surface 103A of the right frame 103 and forms a flat surface.

  The first auxiliary member 110 </ b> A is not necessarily used, and the first auxiliary member 110 in the first embodiment can be used as in the left frame 104.

  That is, when the right frame 103 and the left frame 104 form flat surfaces 103A and 104A protruding in part, either the first auxiliary member 110A or the first auxiliary member 110 can be used. is there.

  However, when the first auxiliary member 110 is used, as shown in FIG. 7, in order to avoid a conflict with the protruding flat surface 104A, it has an “L” -shaped cross section instead of a “U” -shaped cross section. Must be used.

  Furthermore, as shown in FIG. 6, the second auxiliary member 120 </ b> A in the present embodiment is different in shape from the second auxiliary member 120 in the first embodiment. Specifically, the side surface 122 of the second auxiliary member 120 in the first embodiment is formed to be higher than the rail 106 formed on the lower frame 102, but the second auxiliary member 120A in the present embodiment. These side surfaces 122 are formed so as to be substantially the same height as the rails 106 formed on the lower frame 102.

  As described above, the second auxiliary member 120 </ b> A only needs to have the side surface 122 that is not lower than the rail 106 formed on the lower frame 102.

  In addition, the attachment structure of the sash which concerns on this embodiment is an example in which the heat insulating material 140 is not provided.

[Third embodiment]
FIG. 8 is a longitudinal sectional view of a sash mounting structure according to the third embodiment of the present invention.

  In the present embodiment, as shown in FIG. 8, the rails 106 of the lower frame 102 are not at the same height, and one 106a is arranged at a position higher than the other 106b. For this reason, the second auxiliary member 120A in this embodiment is attached in parallel with the higher rail 106a, and the side surface 122 of the second auxiliary member 120A is set to the same height as the rail 106a.

  As described above, when the rails of the lower frame 102 have different heights, the second auxiliary member 120A is attached in accordance with the higher rail.

[Fourth embodiment]
In the first to third embodiments described above, the first auxiliary member 110 is fitted into the upper frame 101, the right frame 103, and the left frame 104.

Specifically, as shown in FIG. 9, the first auxiliary member 110 is fitted into the upper frame 101 so that both side surfaces 112 thereof are in contact with the inner wall of the upper frame 101 (the right frame). The same applies to 103 and the left frame 104).

  FIG. 10 is a cross-sectional view showing the positional relationship between the first auxiliary member 110 and the upper frame 101 in the present embodiment.

  In the present embodiment, the first auxiliary member 110 is configured so that the indoor side surface 112a of both side surfaces 112 is in contact with the outer wall of the upper frame 101, that is, the side surface 112a is visible from the indoor side. 101 is fitted inside.

  Thus, if the surface of the side surface 112a of the first auxiliary member 110 is processed as a decorative plate by being fitted into the upper frame 101 so that the side surface 112a of the first auxiliary member 110 can be seen from the indoor side, the first It is not necessary to use the decorative board 141 in the embodiment, and the number of processes and the number of parts can be reduced.

  Although FIG. 10 shows the upper frame 101, the same applies to the right frame 103 and the left frame 104. Note that it is not necessary to fit the first auxiliary member 110 for all of the upper frame 101, the right frame 103, and the left frame 104 as in the present embodiment, and at least one of the upper frame 101, the right frame 103, and the left frame 104 is used. It can be done for one.

[Fifth embodiment]
Due to aging, climate change, or distortion of existing sashes, gaps may be formed between the support frame 131 of the external sash 130 and the upper frame 101, the right frame 103, and the left frame 104.

  FIG. 11 is a schematic view showing a state where the support frame 131 of the external sash 130 is distorted.

  As shown in FIG. 11, the support frame 131 itself of the external sash 130 is distorted due to aging, climate change, or distortion of the existing sash, and the support frame 131, the upper frame 101, the right frame 103, and the like. Clearances 101 </ b> A, 103 </ b> A, and 104 </ b> A are generated between the left frame 104. For this reason, the outdoor can be seen from the room through the gaps 101A, 103A, and 104A, which is a cause of damaging the living environment.

  In the sash mounting structure according to the fifth embodiment of the present invention, the structure of the first auxiliary member 110 is changed in order to solve such a problem.

  FIG. 12 is a partial cross-sectional view showing a state in which the first auxiliary member 110 in this embodiment is attached to the upper frame 101.

  As shown in FIG. 12, the first auxiliary member 110 in the present embodiment is formed with a protrusion 150 that protrudes from the flat surface 111 toward the outside (in the direction of the lower frame 102 in FIG. 12).

  The protrusion 150 has a shape in which a part of the flat surface 111 is expanded in a rectangular shape toward the outside.

  The projecting portion 150 covers the connection region between the first auxiliary member 110 and the support frame 131 of the external sash 130. For this reason, the gap 101A between the support frame 131 and the upper frame 101 is also covered by the protrusion 150, and the gap 101A is not visible from the indoor side.

  In addition, the shape of the protrusion 150 is not limited to that shown in FIG. 12, and can take various shapes.

  FIG. 13 is a partial cross-sectional view showing a state in which the first auxiliary member 110 having the projecting portion 150 according to the first modification is attached to the upper frame 101.

  As shown in FIG. 13, the protrusion 150 can be formed as a plate-like member that protrudes outward from the flat surface 111 of the first auxiliary member 110. The protrusion 150 according to this modification protrudes from the substantially center of the flat surface 111.

  The plate-like protrusion 150 according to this modification is attached to the flat surface 111 of the first auxiliary member 110 by welding, for example.

  FIG. 14 is a partial cross-sectional view showing a state in which the first auxiliary member 110 having the protrusion 150 according to the second modification is attached to the upper frame 101.

  Similarly to the first modified example, the projecting portion 150 according to the modified example is formed as a plate-like member so as to project outward from the flat surface 111 of the first auxiliary member 110. However, unlike the first modification, in this modification, the projecting portion 150 is located at the end of the first auxiliary member 110 on the indoor side.

  Also by the two modified examples shown in FIGS. 13 and 14, the same effect as that of the protrusion 150 shown in FIG. 12 can be obtained.

  The first auxiliary member 110 is preferably made of aluminum in consideration of corrosion resistance, light weight, and ease of processing.

  Furthermore, as shown in FIG. 15, it is preferable to apply a resin coating 151 to the outer surface of the first auxiliary member 110. By applying the coating 151, the appearance of the first auxiliary member 110 can be improved and the corrosiveness of the first auxiliary member 110 can be improved. Further, by applying the coating 151 to the first auxiliary member 110, the function of closing the gaps 101A, 103A, 104A shown in FIG. 11 can be improved, so that the heat insulation performance on the indoor side can be improved.

It is a longitudinal cross-sectional view of the attachment structure of the sash which concerns on 1st embodiment of this invention. It is a cross-sectional view of the attachment structure of the sash which concerns on 1st embodiment of this invention. It is a perspective view of the 1st auxiliary member in a first embodiment of the present invention. It is a perspective view of the 2nd auxiliary member in a first embodiment of the present invention. It is a flowchart which shows each process at the time of completing the attachment structure of the sash which concerns on 1st embodiment of this invention. It is a longitudinal cross-sectional view of the attachment structure of the sash which concerns on 2nd embodiment of this invention. It is a cross-sectional view of the attachment structure of the sash based on 2nd embodiment of this invention. It is a longitudinal cross-sectional view of the attachment structure of the sash which concerns on 3rd embodiment of this invention. It is sectional drawing which shows the positional relationship of the 1st auxiliary member and upper frame in 1st thru | or 3rd embodiment of this invention. It is sectional drawing which shows the positional relationship of the 1st auxiliary member and upper frame in 4th embodiment of this invention. It is the schematic which shows the condition where the support frame of the external sash was distorted. It is a fragmentary sectional view showing the state where the 1st auxiliary member in a fifth embodiment of the present invention was attached to the upper frame. It is a fragmentary sectional view showing the state where the 1st auxiliary member which has the projection part concerning the 1st modification was attached to the upper frame. It is a fragmentary sectional view showing the state where the 1st auxiliary member which has the projection part concerning the 2nd modification was attached to the upper frame. It is sectional drawing of the 1st auxiliary member which coated the surface.

Explanation of symbols

101 Upper frame 102 Lower frame 103 Right frame 104 Left frame 105, 106 Sash rails 107, 108 Positioning member 110 First auxiliary member 111 Flat surface 112 Side surface 112a Indoor side surface 113, 114 Screw hole 115 Screw 120 Second auxiliary member 121 Bottom 122 Side 123, 124 Through-hole 125, 127 Screw 130 External sash 131 Support frame 140 Heat insulating material 141 Decorative plate 142 Waterproof seal 150 Protruding portion 151 Coating

Claims (11)

In the sash mounting structure where an external sash is added outside the existing sash,
Of the upper frame, the lower frame, the right frame and the left frame constituting the sash frame of the existing sash, the first auxiliary member having a U-shaped cross section is fitted into the upper frame, the right frame and the left frame, respectively. Composing a flat surface,
The first auxiliary member is integrally formed with a protruding portion that protrudes outward from a part of the flat surface,
A second auxiliary member having a height not lower than the rail formed on the lower frame is attached to the lower frame,
A support frame supporting the external sash is attached to the first auxiliary member outside the protrusion so that an outer peripheral surface of the support frame is in contact with the flat surface of the first auxiliary member, and , Attached to the second auxiliary member,
A structure for attaching a sash, wherein a connection region where an outer peripheral surface of the support frame is in contact with the flat surface of the first auxiliary member is covered by the projecting portion when viewed from the indoor side . The sash mounting structure according to claim 1, wherein a heat insulating material is embedded in at least one of the upper frame, the right frame, and the left frame. The sash attachment structure according to claim 1 or 2, wherein a decorative board for concealing a connection region between the sash frame of the existing sash and the first auxiliary member is attached from the indoor side. The sash according to any one of claims 1 to 3, wherein a waterproof seal for sealing a connection region between the support frame of the external sash and the first auxiliary member is attached from the outdoor side. Mounting structure. The first auxiliary member is fitted into at least one of the upper frame, the right frame, and the left frame so that a side surface of the first auxiliary member can be seen from the indoor side. The sash mounting structure described in any one of the above. The sash mounting structure according to any one of claims 1 to 5, wherein the first auxiliary member is made of aluminum, and the surface thereof is coated with a resin. In the installation method of the sash that adds an external sash to the outdoor side of the existing sash,
A first step of removing the existing sash;
Of the upper frame, the lower frame, the right frame and the left frame constituting the sash frame of the existing sash, the first auxiliary member having a U-shaped cross section is fitted into the upper frame, the right frame and the left frame, respectively. A second step of constructing a flat surface;
A third step of attaching to the lower frame a second auxiliary member having a height not lower than the rail formed on the lower frame;
A support frame supporting the external sash is attached to the first auxiliary member so that an outer peripheral surface of the support frame is in contact with the flat surface of the first auxiliary member, and is attached to the second auxiliary member A fourth step;
Equipped with a,
The first auxiliary member is integrally formed with a protruding portion that protrudes outward from a part of the flat surface, and in the fourth step, the support frame is on the outdoor side of the protruding portion. Attached to the first auxiliary member ,
A method for attaching a sash, characterized in that a connection region where an outer peripheral surface of the support frame is in contact with the flat surface of the first auxiliary member is covered by the protrusion when viewed from the indoor side . The method for attaching a sash according to claim 7, further comprising a step of embedding a heat insulating material in at least one of the upper frame, the right frame, and the left frame. The method for attaching a sash according to claim 7 or 8, further comprising a step of attaching a decorative board for concealing a connection region between the sash frame of the existing sash and the first auxiliary member from the indoor side. The sash according to any one of claims 7 to 9, further comprising a step of attaching a waterproof seal for sealing a connection region between the sash frame of the external sash and the first auxiliary member from the outdoor side. How to install. In the second step, the first auxiliary member is fitted into at least one of the upper frame, the right frame, and the left frame so that the side surface of the first auxiliary member can be seen from the indoor side. A method for attaching a sash according to any one of claims 7 to 10.

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