JP2024068369A - Opening frame and opening structure - Google Patents

Abstract

To easily form a non-rectangular opening in a wall of a room.
[Solution] An opening frame 20 that borders a non-rectangular opening 2 formed in a wall W extends along the periphery of the notches 3, 3 of a pair of wall base materials 10, 10 that constitute a part of the wall W in which the notches 3, 3 that become the opening 2 are formed, and includes a plate-shaped frame main body 21 that shields the space between the pair of wall base materials 10, 10, and a support part 22 that is inserted between the pair of wall base materials 10, 10 and fixed to the pair of wall base materials 10, 10, and supports the frame main body 21. The frame main body 21 is made of a resin material mainly composed of polyvinyl chloride and is configured to be deformable by hand.
[Selected figure] Figure 2

Description

The present invention relates to an opening frame for forming a non-rectangular opening with a curved portion in an interior wall, and an opening structure equipped with the same.

Conventionally, non-rectangular openings, such as arch-shaped openings, have been formed in interior walls of houses and the like (see, for example, Patent Document 1 below). For this type of non-rectangular opening, an opening frame made of bent plywood or the like that has been pre-formed into the opening shape has been prepared, transported to the construction site, and then constructed.

Japanese Patent Publication No. 59-44470

However, when using an opening frame that has been pre-formed into a non-rectangular opening shape, it must be precisely formed into the opening shape (bent plywood, for example) so that it fits snugly around the periphery of the cutout in the wall base material at the construction site. As a result, with conventional methods, preparing the opening frame is time-consuming, and the opening frame needs to be finished after construction, but this work is not easy, meaning that it is not easy to form a non-rectangular opening.

The present invention was made in consideration of these points, and its purpose is to make it easier to form non-rectangular openings in interior walls.

In order to achieve the above objective, the present invention provides a plate-shaped frame body that extends along the periphery of the cutouts in a pair of wall base materials to provide shielding between the pair of wall base materials, and is constructed from a soft material so that it can be deformed by hand.

Specifically, the first invention is based on an opening frame that borders a non-rectangular opening formed in a wall.

The first invention is characterized in that it comprises a plate-shaped frame body portion that extends along the periphery of the cutout of a pair of wall base materials that constitute a part of the wall in which the cutout that becomes the opening is formed, shielding the space between the pair of wall base materials, and a support portion that is inserted between the pair of wall base materials and fixed to the pair of wall base materials, supporting the frame body portion, and that the frame body portion is made of a first soft material and is configured to be deformable by hand.

Here, the "first soft material" refers to a material that allows the frame body to be deformed by hand, and may be, for example, a material with elasticity such as a synthetic resin material or a natural resin material.

In the first invention, the plate-shaped frame body portion that is formed into the opening shape of the non-rectangular opening and borders the opening is made of a first soft material and is configured to be deformable by hand. Therefore, the frame body portion can be deformed so as to extend along the periphery of the cutouts in the pair of wall base materials at the construction site, and then installed on the periphery of the cutouts in the pair of wall base materials. Therefore, according to the first invention, the plate-shaped frame body portion that is formed into the opening shape of the non-rectangular opening and borders the opening can be deformed at the construction site and easily installed with high precision so as to fit closely to the periphery of the cutouts in the pair of wall base materials, without having to be molded into the opening shape in advance.

The second invention is the first invention, characterized in that the support portion protrudes from one side of the frame body portion and extends in the longitudinal direction of the frame body portion, is made of a second soft material that is the same as or different from the first soft material, and is configured to be integral with the frame body portion and deformable by hand.

Here, the "second soft material" refers to a material that allows the support part to be deformed by hand, and for example, a material having elasticity such as a synthetic resin material or a natural resin material can be used.

In addition, "integrally formed with the frame main body" may mean integrally formed by injection molding, or may be molded separately and then integrated by bonding, fusion, welding, etc.

In the second invention, the support part is also made of a long member like the frame body part, but like the frame body part, it is made of a second soft material and is deformable by hand. The support part is also integrally formed with the frame body part. Therefore, the opening frame can be easily constructed by deforming the frame body part and the support part so that they extend along the periphery of the cutouts in the pair of wall base materials at the construction site, inserting the support part between the pair of wall base materials and fixing the support part to both wall base materials. Therefore, according to the second invention, the opening frame that is formed in the opening shape of the non-rectangular opening and borders the opening can be easily constructed with high precision so as to fit closely to the periphery of the non-rectangular opening while being deformed at the construction site.

The third invention is the second invention, characterized in that the support portion comprises a pair of plate-shaped legs each protruding from one side of the frame body portion and extending parallel to each other in the longitudinal direction of the frame body portion.

In the third invention, the support part is made up of a pair of plate-shaped legs. With this configuration, the support part that is fixed to a pair of wall base materials and supports the frame main body part can be made lightweight and easily deformed using the minimum necessary amount of the second soft material.

The fourth invention is the first invention, characterized in that the support part is configured separately from the frame main body part, the frame main body part and the support part are each provided with an engagement part that engages with each other, and the engagement parts of the frame main body part and the support part are configured such that, when engaged with each other, the frame main body part is attached to and supported by the support part.

In the fourth invention, the support parts are constructed separately from the frame main body part, and the frame main body part can be easily attached to the support parts by simply engaging the engagement parts. With this configuration, the opening frame can be easily constructed by first inserting and fixing the support parts into a pair of wall base materials, and then attaching the frame main body part to the fixed support parts.

The fifth invention is the fourth invention, characterized in that the support part is made of a second soft material that is the same as or different from the first soft material, is manually deformable, and is inserted between the pair of wall base materials and extends along the outer periphery of the cutout.

In the fifth invention, the support part is also composed of a long member like the frame main body part, but like the frame main body part, it is composed of a second soft material that can be deformed by hand. Therefore, the support part can be easily deformed at the construction site, and by inserting the support part between a pair of wall base materials while deforming it, it can be easily positioned so that it fits along the outer periphery of the cutouts in the pair of wall base materials. According to the fifth invention, an opening frame that borders a non-rectangular opening can be easily and precisely constructed at the construction site so that it fits closely to the periphery of the non-rectangular opening.

The sixth invention is any one of the first to fifth inventions, characterized in that the support portion has two outer surfaces that abut against the inner surfaces of the pair of wall base materials, and at least a portion of each of the outer surfaces is formed in an uneven shape.

In the sixth invention, at least a portion of the two outer surfaces of the support part that is inserted between a pair of wall base materials and abuts against the inner surfaces of the pair of wall base materials is formed with an uneven shape. Therefore, when the support part is inserted between the pair of wall base materials, the frictional resistance between the outer surface of the support part and the inner surface of the wall base material increases, making it easier for the support part to get caught on the pair of wall base materials. Therefore, when the support part is fixed to the pair of wall base materials, it is possible to prevent the support part from shifting, making the fixing work easier.

The seventh invention is an opening structure that forms a non-rectangular opening in a wall, and is characterized in that it comprises a pair of wall base materials that constitute a part of the wall in which a cutout that becomes the opening is formed, and an opening frame that borders the opening, and the opening frame is an opening frame according to any one of the first to fifth inventions.

According to the seventh aspect of the invention, since the opening frame according to any one of the first to fifth aspects of the invention is provided, it is possible to easily form a non-rectangular opening in a wall.

As described above, according to the present invention, the plate-shaped frame body that extends along the periphery of the cutouts in a pair of wall base materials and shields the space between the pair of wall base materials is made of a soft material and is manually deformable, making it easy to form a non-rectangular opening in the wall inside the room.

FIG. 1 is a front view of an opening structure according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the opening structure according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view of the opening structure according to the first embodiment of the present invention. FIG. 4 is an enlarged view of a portion of FIG. FIG. 5 is a cross-sectional view of an opening structure according to a second embodiment of the present invention. FIG. 6 is an enlarged view of a portion of FIG.

The following describes in detail the embodiments of the present invention with reference to the drawings. The following description of the embodiments is merely exemplary in nature and is in no way intended to limit the present invention, its applications, or its uses.

First Embodiment of the Invention
-Outline of the opening structure-
As shown in Fig. 1, the opening structure 1 forms a non-rectangular opening 2 in a wall W inside a building such as a house. In this embodiment 1, an example of forming an arch-shaped opening 2 will be described as an example of a non-rectangular opening 2. For convenience of description, the upper side, lower side, left side, and right side of Fig. 1 will be described as "upper", "lower", "left", and "right", respectively. Also, the near side in the direction perpendicular to the paper surface of Fig. 1 will be described as "front" and the far side as "rear".

As shown in Figures 1 and 2, the opening structure 1 includes a pair of wall base materials 10, 10 that form part of a wall W, each of which has a notch 3 that becomes an opening 2, and an opening frame 20 that borders the opening 2.

[Wall underlayment material]
The wall base material 10 is processed into an arch shape by a plurality of gypsum boards 11 to 13. In the present embodiment 1, the wall base material 10 is composed of an upper gypsum board 11 with a semicircular cutout formed therein, and two rectangular and long side gypsum boards 12 and 13. The gypsum boards 11 to 13 are arranged so that the two side gypsum boards 12 and 13 extend continuously downward from the left and right lower ends of the upper gypsum board 11, and are fixed to a framework (not shown) such as a pillar or lintel with screws or the like. The wall base material 10 is formed into an arch shape by arranging the three gypsum boards 11 to 13 as described above and fixing them to the framework.

A pair of wall base materials 10, 10 are installed on the front and rear sides of the structure, respectively, and form part of the wall W of the large wall structure. The pair of wall base materials 10, 10 are installed so that they protrude by an insertion allowance from the end face of the structure on the opening 2 side, so that an insertion allowance (space) is formed on the outer peripheral edge of the cutout 3 for inserting the support part 22 of the opening frame 20 described later.

As shown in FIG. 3, in this embodiment 1, cloth C is applied to the decorative surfaces of a pair of wall base materials 10, 10 (the front surface of the front wall base material 10 and the rear surface of the rear wall base material 10).

[Opening frame]
As shown in Figures 3 and 4, the opening frame 20 includes a plate-shaped frame body 21 that shields the space between a pair of wall base materials 10, 10, and a support portion 22 that supports the frame body 21. The frame body 21 is made of a resin material (first soft material) mainly made of polyvinyl chloride so as to be deformable by hand. The support portion 22 is also made of a resin material (second soft material) mainly made of polyvinyl chloride so as to be deformable by hand. In this embodiment 1, the frame body 21 and the support portion 22 are integrally formed by injection molding.

The frame body 21 is a narrow, thin, long rectangular plate-like portion. The frame body 21 extends from one end (left end) 3a to the other end (right end) 3b of the periphery of the notches 3, 3 of the pair of wall base materials 10, 10 along the periphery of the notches 3, 3 so as to shield the space between the pair of wall base materials 10, 10. The frame body 21 is thus arranged to frame the opening 2.

The width of the frame body 21 is formed to a length that extends from the front surface of the wall base material 10 on the front side of the opening 2 to the rear surface of the wall base material on the rear side so as to shield the space between the pair of wall base materials 10, 10 and to shield the end faces of the pair of wall base materials 10, 10 on the opening 2 side. In this embodiment 1, the width of the frame body 21 is formed to be about 4 to 10 mm longer than the thickness of the wall W. Therefore, the frame body 21 protrudes about 2 to 5 mm (preferably 3 mm or more) forward and backward from the front and rear surfaces of the wall W. By making the width of the frame body 21 longer than the thickness of the wall W in this way, decorative materials such as the cloth C can be secured without using a trim material. In addition, by hitting the cloth C against the protruding part of the frame body 21 and cutting it, the end of the cloth C becomes less noticeable and the end processing becomes easier.

The thickness of the frame body 21 is, for example, about 2 to 5 mm. The thickness of the frame body 21 may be any thickness that allows the frame body 21 to be bent manually along the periphery of the cutouts 3, 3 of the pair of wall base materials 10, 10, and may be changed depending on the material that constitutes the frame body 21.

The length of the frame body 21 is formed to extend from one end (left end) 3a to the other end (right end) 3b of the periphery of the notches 3, 3 of a pair of wall base materials 10, 10.

In this embodiment 1, as shown in FIG. 1, a baseboard 4 is provided at the lower end of a pair of wall base materials 10. The baseboard 4 is installed so that it extends continuously from the front wall base material 10 to the rear wall base material 10 while being bent. Therefore, the lower end between the pair of wall base materials 10 is shielded by the baseboard 4.

By providing the baseboards 4, 4 as described above, in this embodiment 1, the frame body 21 is formed to a length extending from the top end of the baseboard 4 at one end (left end) 3a of the periphery of the notches 3, 3 to the top end of the baseboard 4 at the other end (right end) 3b. Note that the baseboards 4, 4 do not necessarily have to be provided, and if the baseboards 4, 4 are not provided, the frame body 21 may be formed to a length extending from one end of the periphery of the notches 3, 3 that contacts the floor to the other end that also contacts the floor.

In this embodiment 1, the length of the frame body 21 is formed by cutting at the construction site to a length that extends from the upper end of the baseboard 4 at one end (left end) 3a of the periphery of the notches 3, 3 of a pair of wall base materials 10, 10 to the upper end of the baseboard 4 at the other end (right end) 3b.

The support section 22 is composed of a pair of plate-shaped legs 23, 23 that protrude from one side of the frame body section 21 and extend parallel to each other in the longitudinal direction of the frame body section 21. The pair of legs 23, 23 are similarly constructed. The pair of legs 23, 23 are formed so that the distance between the outer surfaces 23a, 23a is equal to or slightly greater than the distance between the inner surfaces of the pair of wall base materials 10, 10, so that the outer surfaces 23a, 23a abut against the inner surfaces of the pair of wall base materials 10, 10 when the pair of legs 23, 23 are inserted between the pair of wall base materials 10, 10.

The leg 23 is a long, narrow, thin rectangular plate-like portion. The width (protruding height) of the leg 23 is formed to be approximately 20 to 40 mm. The thickness of the leg 23 is formed to be approximately 3 to 7 mm. The length of the leg 23 is formed to be a length extending from one end to the other end in the longitudinal direction of the frame main body 21 (i.e., in this embodiment 1, the length extending from the upper end of the baseboard 4 at one end 3a of the periphery of the notches 3, 3 of a pair of wall base materials 10, 10 to the upper end of the baseboard 4 at the other end 3b).

In addition, multiple linear protrusions 23b, ..., 23b are formed on at least a portion of the outer surface 23a of the leg 23. The linear protrusions 23b protrude slightly from the outer surface 23a of the leg 23 and extend from one end to the other end in the longitudinal direction of the leg 23 (i.e., from one end to the other end in the longitudinal direction of the frame main body 21). Due to these multiple linear protrusions 23b, ..., 23b, at least a portion of the outer surface 23a of the leg 23 is formed into an uneven shape.

The support portion 22 (a pair of legs 23, 23) is inserted between a pair of wall base materials 10, 10, and is fixed to the pair of wall base materials 10, 10 by screws 30, 30 with the two outer surfaces 23a, 23a abutting the inner surfaces of the pair of wall base materials 10, 10.

- Opening structure construction method -
Next, a construction method for the opening structure 1 will be described.

First, a pair of wall base materials 10, 10 are installed. Three gypsum boards 11-13 are placed on the front and rear of a structure (not shown) such as pillars and lintels, and two side gypsum boards 12, 13 are placed on the left and right lower ends of the upper gypsum board 11 so that they extend continuously downward, and each is fixed to the structure with screws or the like. This completes the installation of a pair of arch-shaped wall base materials 10, 10.

Next, baseboards 4, 4 are installed on the lower ends of the pair of wall base materials 10, 10. The baseboards 4, 4 extend continuously while being bent from the front wall base material 10 to the rear wall base material 10, and are fixed to the wall base material 10 with screws or the like. The lower end between the pair of wall base materials 10, 10 is shielded by the baseboards 4, 4.

Next, the opening frame 20 is constructed.

First, the support part 22 (a pair of legs 23, 23) is inserted between the pair of wall base materials 10, 10 in sequence from one end 3a side to the other end 3b side of the periphery of the notches 3, 3 of the pair of wall base materials 10, 10 (or vice versa). As described above, in this embodiment 1, baseboards 4, 4 are provided at the lower ends of the pair of wall base materials 10, 10, and the lower end between the pair of wall base materials 10, 10 is shielded by the baseboards 4, 4. Therefore, in this embodiment 1, the support part 22 (a pair of legs 23, 23) is inserted from the upper end of the baseboard 4 at one end (left end) 3a of the periphery of the notches 3, 3 of the pair of wall base materials 10, 10 to the upper end of the baseboard 4 at the other end (right end) 3b.

Adhesive is applied to the outer surfaces 23a, 23a of the support portion 22 before insertion. When inserting the support portion 22, the frame body portion 21 is deformed (curved) by hand so that the frame body portion 21 fits along the periphery of the notches 3, 3 of the pair of wall base materials 10, 10 while the support portion 22 is being inserted. The support portion 22 is inserted until the end face on the side of the notches 3 of the pair of wall base materials 10, 10 abuts the frame body portion 21.

When the support portion 22 is inserted from the upper end of the baseboard 4 at one end 3a of the periphery of the notches 3,3 of the pair of wall base materials 10,10 to the upper end of the baseboard 4 at the other end 3b, the frame body portion 21 shields the space between the pair of wall base materials 10,10 (above the baseboards 4,4 in this embodiment 1), and also shields the end faces of the pair of wall base materials 10,10 on the opening 2 side (above the baseboards 4,4 in this embodiment 1). In other words, the frame body portion 21 borders the opening 2. In this state, the support portion 22 is fixed to the pair of wall base materials 10,10 by driving screws 30 from the outside to the inside of the wall base materials 10,10 at the multiple locations where the support portion 22 has been inserted.

After the opening frame 20 is installed, the cloth C is installed on the decorative surface of the wall W, which includes the pair of wall base materials 10, 10.

By following the above steps, the opening structure 1 is constructed and a non-rectangular (arch-shaped) opening 2 is formed in the wall W.

--Effects of the First Embodiment--
In this embodiment 1, the plate-shaped frame body 21 formed in the opening shape of the non-rectangular (arch-shaped) opening 2 and edging the opening 2 is made of a resin material (first soft material) mainly made of polyvinyl chloride and is deformable by hand. Therefore, the frame body 21 can be deformed at the construction site so as to extend along the periphery of the notches 3, 3 of the pair of wall base materials 10, 10 while being constructed on the periphery of the notches 3, 3 of the pair of wall base materials 10, 10. Therefore, according to this embodiment 1, the plate-shaped frame body 21 formed in the opening shape of the non-rectangular (arch-shaped) opening 2 and edging the opening 2 can be deformed at the construction site so as to easily and precisely fit the periphery of the notches 3, 3 of the pair of wall base materials 10, 10 without being molded into the opening shape.

In this embodiment 1, the support part 22 is also made of a long member like the frame body part 21, but like the frame body part 21, it is made of a resin material (second soft material) mainly made of polyvinyl chloride and is made deformable by hand. The support part 22 is also made integral with the frame body part 21. Therefore, the opening frame 20 can be easily constructed by deforming the frame body part 21 and the support part 22 so that they extend along the periphery of the cutouts 3, 3 of the pair of wall base materials 10, 10 at the construction site, inserting the support part 22 between the pair of wall base materials 10, 10 and fixing the support part 22 to both wall base materials 10, 10. Therefore, according to this embodiment 1, the opening frame 20, which is formed in the opening shape of the non-rectangular (arch-shaped) opening 2 and borders the opening 2, can be easily constructed with high precision so as to fit closely to the periphery of the non-rectangular (arch-shaped) opening 2 while being deformed at the construction site.

In addition, in this embodiment 1, the support portion 22 is composed of a pair of plate-shaped legs 23, 23. With this configuration, the support portion 22, which is fixed to a pair of wall base materials 10, 10 and supports the frame main body portion 21, can be constructed to be lightweight and easily deformable using the minimum amount of material (second soft material).

In addition, in this embodiment 1, at least a portion of the two outer surfaces 23a, 23a of the support portion 22 that is inserted between a pair of wall base materials 10, 10 and abuts against the inner surfaces of the pair of wall base materials 10, 10 is formed in an uneven shape. Therefore, when the support portion 22 is inserted between the pair of wall base materials 10, 10, the frictional resistance between the outer surfaces 23a, 23a of the support portion 22 and the inner surfaces of the wall base materials 10, 10 increases, making it easier for the support portion 22 to get caught on the pair of wall base materials 10, 10. Therefore, when the support portion 22 is fixed to the pair of wall base materials 10, 10, it is possible to prevent the support portion 22 from shifting, making the fixing work easier.

In addition, according to this embodiment 1, the opening structure 1 for forming a non-rectangular (arch-shaped) opening 2 in the wall W includes the opening frame 20 as described above, so that the non-rectangular (arch-shaped) opening 2 can be easily formed in the wall W.

Second Embodiment of the Invention
5 and 6, the opening structure 1 of the second embodiment is configured such that the frame body 21 and the support 22 of the opening frame 20 are separately constructed. In the following, only the parts different from the first embodiment will be described in detail, and the detailed description of the same configuration as the first embodiment will be omitted.

[Opening frame]
In the second embodiment as well, the opening frame 20 includes a plate-shaped frame body 21 that shields the space between a pair of wall base materials 10, 10, and a support portion 22 that supports the frame body 21. In the second embodiment, the frame body 21 and the support portion 22 are made of resin materials (first and second soft materials) mainly made of polyvinyl chloride, as in the first embodiment, but are made separately. The frame body 21 and the support portion 22 that are made separately are both made to be deformable by hand.

In the second embodiment, the frame body 21 has a narrow, thin, long rectangular plate-shaped portion 24 and an engagement portion 25 that engages with the support portion 22. The plate-shaped portion 24 and the engagement portion 25 are integrally formed from polyvinyl chloride (first soft material).

The width of the plate-like portion 24 is formed to be approximately 4 to 10 mm longer than the thickness of the wall W, similar to the width of the frame body 21 in embodiment 1. Therefore, the plate-like portion 24 of the frame body 21 protrudes approximately 2 to 5 mm (preferably 3 mm or more) forward and backward from the front and rear faces of the wall W. By making the width of the frame body 21 longer than the thickness of the wall W in this way, decorative materials such as cloth C can be secured without using trim materials. Also, by hitting the cloth C against the protruding portion of the frame body 21 and cutting it, the ends of the cloth C become less noticeable and end processing becomes easier.

The thickness of the plate-like portion 24 is, for example, about 2.5 to 5 mm at both ends in the width direction, and the remaining portions are thinner than both ends in the width direction, for example, about 1 to 2.5 mm. The thickness of the plate-like portion 24 may be any thickness that allows the plate-like portion 24 to be bent by hand along the periphery of the cutouts 3, 3 of the pair of wall base materials 10, 10, and may be changed depending on the material that constitutes the plate-like portion 24.

The length of the plate-like portion 24 is the same as the length of the frame body portion 21 in embodiment 1, and is formed to a length that extends from the upper end of the baseboard 4 at one end (left end) 3a of the periphery of the notches 3, 3 of a pair of wall base materials 10, 10 to the upper end of the baseboard 4 at the other end (right end) 3b.

The engaging portion 25 is composed of a pair of engaging pieces 26, 26 that protrude from one surface of the plate-like portion 24 and extend parallel to each other in the longitudinal direction of the plate-like portion 24. Each of the pair of engaging pieces 26, 26 has a vertical portion perpendicular to the plate-like portion 24 and an inclined portion inclined relative to the vertical portion and the plate-like portion 24, and is formed in a V-shaped cross section, with the vertical portions facing each other. The pair of engaging pieces 26, 26 are formed so that the distance between the vertical portion of the engaging piece 26 and the widthwise end of the plate-like portion 24 is slightly longer than the width of the engaging piece 29, so that a pair of engaging pieces 29, 29 of the support portion 22 described later can be fitted between the pair of engaging pieces 26, 26 and both widthwise ends of the plate-like portion 24.

In the second embodiment, the support portion 22 has a long support body portion 27 with a U-shaped cross section, and an engagement portion 28 that engages with the engagement portion 25 (a pair of engagement pieces 26, 26) of the frame body portion 21. The support body portion 27 and the engagement portion 28 are integrally formed from polyvinyl chloride (a second soft material). Note that in the second embodiment, the frame body portion 21 and the support portion 22 are made of the same polyvinyl chloride, but the support portion 22 is made of polyvinyl chloride that is harder than the polyvinyl chloride used in the frame body portion 21.

The support body 27 is formed with a U-shaped cross section by a pair of legs 27a, 27a and a connecting portion 27b. The pair of legs 27a, 27a are configured in the same way. The pair of legs 27a, 27a are formed so that when the support body 27 of the support portion 22 is inserted between the pair of wall base materials 10, 10, the distance between the outer surfaces 27c, 27c is equal to or slightly greater than the distance between the inner surfaces of the pair of wall base materials 10, 10 so that the outer surfaces 27c, 27c abut against the inner surfaces of the pair of wall base materials 10, 10.

The leg 27a is a long, narrow, thin rectangular plate-like portion. The width (protruding height) of the leg 27a is formed to be approximately 20 to 40 mm. The thickness of the leg 27a is formed to be approximately 1 to 2 mm. The length of the leg 27a is formed to be a length extending from one end to the other end in the longitudinal direction of the frame main body 21 (i.e., a length extending from the upper end of the baseboard 4 at one end 3a of the periphery of the notches 3, 3 of a pair of wall base materials 10, 10 to the upper end of the baseboard 4 at the other end 3b).

The connecting portion 27b is a thin, long rectangular plate-like portion that connects one end of the pair of legs 27a, 27a. The width of the connecting portion 27b is formed to a length equal to the distance between the outer surfaces 27c, 27c of the pair of legs 27a, 27a. The thickness of the connecting portion 27b is the same as the thickness of the leg 27a, and is formed to be approximately 1 to 2 mm. The length of the connecting portion 27b is formed to be the same as the length of the leg 27a.

The engagement portion 28 is composed of a pair of flat engagement pieces 29, 29 that are continuous with the other ends (the ends opposite the connecting portion 27b) of the pair of legs 27a, 27a of the support body 27 and extend in the longitudinal direction of each leg 27a and are perpendicular to each leg 27a. Each engagement piece 29 has an inner portion 29a that extends inward from the other end of the leg 27a and an outer portion 29b that extends outward from the other end of the leg 27a.

The support portion 22 is fixed to the pair of wall base materials 10, 10 by screws 31, 31 with the support body portion 27 inserted between the pair of wall base materials 10, 10, the two outer surfaces 27c, 27c of the support body portion 27 abutting the inner surfaces of the pair of wall base materials 10, 10, and the outer portions 29b, 29b of the pair of engagement pieces 29, 29 abutting the end faces on the cutout 3 side of the pair of wall base materials 10, 10.

When the frame body 21 is pressed against the support 22 so that the pair of engagement pieces 29, 29 of the support 22 fixed to the pair of wall underlayment materials 10, 10 fit between the pair of engagement pieces 26, 26 of the frame body 21 and both ends of the plate-like portion 24 in the width direction, the pair of engagement pieces 26, 26 of the frame body 21 hook (engage) with the inner portions 29a, 29a of the pair of engagement pieces 29, 29 of the support 22, thereby attaching the frame body 21 to the support 22. In other words, when the engagement parts 25 of the frame body 21 and the engagement parts 28 of the support 22 are engaged with each other, the frame body 21 is attached to the support 22 and supported.

- Opening structure construction method -
Next, a description will be given of a construction method for the opening structure 1. In the second embodiment as well, first, a pair of wall base materials 10, 10 are constructed, and then baseboards 4, 4 are constructed at their lower ends. The construction method for the pair of wall base materials 10, 10 and the baseboards 4, 4 is the same as in the first embodiment, and therefore the description will be omitted.

Next, the opening frame 20 is constructed. In the second embodiment, the support part 22, which is constructed separately from the frame main body part 21, is first fixed to a pair of wall base materials 10, 10.

Specifically, the support body 27 of the support part 22 is inserted between the pair of wall base materials 10, 10 in order from one end 3a side to the other end 3b side of the periphery of the notches 3, 3 of the pair of wall base materials 10, 10 (or vice versa). Adhesive is applied to the two outer surfaces 27c, 27c of the support part 22 before insertion. When inserting the support body 27 of the support part 22, the support part 22 is inserted while being deformed (curved) by hand so that the support part 22 fits along the periphery of the notches 3, 3 of the pair of wall base materials 10, 10. The support part 22 is inserted until the outer parts 29b, 29b of the pair of flat engagement pieces 29, 29 of the engagement part 28 abut the end faces on the notches 3 side of the pair of wall base materials 10, 10.

Then, with the support body 27 of the support part 22 inserted from the top end of the baseboard 4 at one end 3a of the periphery of the notches 3,3 of the pair of wall base materials 10,10 to the top end of the baseboard 4 at the other end 3b, screws 31 are driven from the outside to the inside of the wall base materials 10,10 into the multiple locations where the support body 27 of the support part 22 has been inserted, thereby fixing the support part 22 to the pair of wall base materials 10,10.

After the support portion 22 is fixed, the frame body portion 21 is attached to the support portion 22. Specifically, the frame body portion 21 is pressed against the support portion 22 in sequence from one end 3a side to the other end 3b side of the periphery of the notches 3, 3 of the pair of wall base materials 10, 10 (or vice versa). In the portion where the frame body portion 21 is pressed, the inclined portions of the pair of engagement pieces 26, 26 of the frame body portion 21 climb over the inner portions 29a, 29a of the pair of engagement pieces 29, 29 of the support portion 22 and get caught on the inner portions 29a, 29a. In addition, the pair of engagement pieces 29, 29 of the support portion 22 fit between the pair of engagement pieces 26, 26 of the frame body portion 21 and both ends of the plate-shaped portion 24 in the width direction, respectively. In this way, the pair of engagement pieces 26, 26 of the frame body 21 hook onto the inner portions 29a, 29a of the pair of engagement pieces 29, 29 of the support part 22 (the engagement parts 25, 28 of the frame body 21 and the support part 22 engage with each other), and the frame body 21 is attached to the support part 22.

In this way, when the frame body 21 is attached to the support 22 from the upper end of the baseboard 4 at one end 3a of the periphery of the notches 3,3 of a pair of wall base materials 10,10 to the upper end of the baseboard 4 at the other end 3b, the frame body 21 shields the space between the pair of wall base materials 10,10 (above the baseboards 4,4) and also shields the end faces of the pair of wall base materials 10,10 on the opening 2 side (above the baseboards 4,4). In other words, the frame body 21 borders the opening 2.

After the opening frame 20 is installed, the cloth C is installed on the decorative surface of the wall W, which includes the pair of wall base materials 10, 10.

By following the above steps, the opening structure 1 is constructed and a non-rectangular (arch-shaped) opening 2 is formed in the wall W.

--Effects of the second embodiment--
In the second embodiment, the plate-shaped frame body 21 formed in the opening shape of the non-rectangular (arch-shaped) opening 2 and edging the opening 2 is made of a resin material (first soft material) mainly made of polyvinyl chloride and is deformable by hand. Therefore, the frame body 21 can be deformed at the construction site to extend along the periphery of the notches 3, 3 of the pair of wall base materials 10, 10 while being constructed on the periphery of the notches 3, 3 of the pair of wall base materials 10, 10. Therefore, according to the first embodiment, the plate-shaped frame body 21 formed in the opening shape of the non-rectangular (arch-shaped) opening 2 and edging the opening 2 can be deformed at the construction site to easily and precisely fit the periphery of the notches 3, 3 of the pair of wall base materials 10, 10 without being molded into the opening shape.

In addition, in this embodiment 2, the support portion 22 is configured separately from the frame body portion 21, and is configured so that the frame body portion 21 can be easily attached to the support portion 22 simply by engaging the engagement portions 25, 28. With this configuration, the support portion 22 is first inserted into and fixed in a pair of wall base materials 10, 10, and the frame body portion 21 is then attached to the fixed support portion 22, allowing the opening frame 20 to be easily constructed.

In the second embodiment, the support portion 22 is also made of a long member like the frame body portion 21, but like the frame body portion 21, it is made of a resin material (second soft material) mainly made of polyvinyl chloride and is deformable by hand. Therefore, the support portion 22 can be easily deformed at the construction site, and by inserting the support portion 22 between a pair of wall base materials 10, 10 while deforming it, it can be easily positioned so as to follow the outer periphery of the cutouts 3, 3 of the pair of wall base materials 10, 10. Therefore, according to the second embodiment, the opening frame 20 that borders the non-rectangular opening 2 can be easily and precisely constructed at the construction site so as to fit closely to the periphery of the non-rectangular (arch-shaped) opening 2.

Also, in this embodiment 1, the opening structure 1 for forming a non-rectangular (arch-shaped) opening 2 in the wall W includes the opening frame 20 as described above, so that the non-rectangular (arch-shaped) opening 2 can be easily formed in the wall W.

Other Embodiments
In the above-mentioned first and second embodiments, an example of forming an arch-shaped opening 2 has been described as an example of a non-rectangular opening 2, but the non-rectangular opening 2 to which the opening frame 20 according to the present invention is applied is not limited to an arch-shaped opening. In particular, when the opening frame 20 according to the present invention is applied to an opening 2 having a curved portion, such as a circular or semicircular opening 2, the effect of the present invention that a non-rectangular opening 2 can be easily formed in the wall W becomes more remarkable.

In the above first and second embodiments, the wall base material 10 is composed of three gypsum boards 11 to 13, but the configuration of the wall base material 10 is not limited to this. The wall base material 10 may be composed of one, two, four or more gypsum boards, or one or more wood boards.

In addition, in the above embodiments 1 and 2, the opening frame 20 is composed of a single member, but the opening frame 20 may be composed of multiple members.

In addition, in the above-mentioned first and second embodiments, a resin material mainly made of polyvinyl chloride is used as the first soft material constituting the frame body 21, but the first soft material constituting the frame body 21 may be any material that can be used to make the frame body 21 deformable by hand. In addition to polyvinyl chloride, materials having elasticity, such as synthetic resin materials and natural resin materials, can be used as the first soft material.

In addition, in the above-mentioned first and second embodiments, a resin material mainly made of polyvinyl chloride is used as the second soft material constituting the support part 22, but the second soft material constituting the support part 22 may be any material that can make the support part 22 deformable by human hands. In addition to polyvinyl chloride, materials having elasticity such as synthetic resin materials and natural resin materials can be used as the second soft material.

In addition, in the above-mentioned first and second embodiments, the first soft material constituting the frame main body 21 and the second soft material constituting the support part 22 are described as being the same material (a resin material mainly made of polyvinyl chloride), but the first soft material constituting the frame main body 21 and the second soft material constituting the support part 22 may be different materials.

In addition, in the above-mentioned first and second embodiments, the frame body 21 is formed so that its width is approximately 4 to 10 mm longer than the thickness of the wall W, and is formed so that it protrudes approximately 2 to 5 mm forward and backward from the front and rear surfaces of the wall W, respectively, but the frame body 21 is not limited to the above configuration. The frame body 21 may be formed so that its width is the same length as the thickness of the wall W, and may also be bent at the front and rear surfaces of the wall W and have edge portions that extend along the front and rear surfaces of the wall W.

In addition, in the above-mentioned embodiments 1 and 2, the support portion 22 is configured to have a pair of legs 23, 23/27a, 27a, but is not limited to such a configuration. The support portion 22 may be inserted between a pair of wall base materials 10, 10 and configured to have two outer surfaces 23a, 23a/27c, 27c that abut against the inner surfaces of the pair of wall base materials 10, 10 so that it can be fixed to the inner surfaces of the pair of wall base materials 10, 10. For example, in embodiment 1, the support portion 22 may have a bar-shaped piece portion that is bridged across the pair of legs 23, 23, or a columnar body with a rectangular cross section may protrude from one side of the frame main body portion 21 instead of the pair of legs 23, 23. Similarly, in the second embodiment, the support portion 22 may have a bar-shaped piece portion that is spanned between a pair of legs 27a, 27a, and the support body portion 27 may be configured as a columnar body with a rectangular cross section, and may have a groove or the like formed therein into which the pair of engagement pieces 26, 26 of the frame body portion 21 are fitted.

In addition, in the above-mentioned first embodiment, the frame body 21 and the support portion 22 are integrally formed by injection molding, but the method of integrally forming the frame body 21 and the support portion 22 is not limited to injection molding. The frame body 21 and the support portion 22 may be molded separately and then fixed together by adhesion, fusion, welding, or the like to be integrated.

In the above-mentioned second embodiment, the two outer surfaces 27c, 27c of the support portion 22 are configured as flat surfaces, but at least a part of them may be formed in an uneven shape, similar to the two outer surfaces 23a, 23a of the support portion 22 in the first embodiment. With this configuration, when the support body portion 27 of the support portion 22 is inserted between the pair of wall base materials 10, 10, the friction resistance between the outer surfaces 27c, 27c of the support portion 22 and the inner surfaces of the wall base materials 10, 10 increases, and the support portion 22 becomes more likely to be caught by the pair of wall base materials 10, 10. Therefore, when the support portion 22 is fixed to the pair of wall base materials 10, 10, the support portion 22 can be prevented from shifting, making the fixing work easier.

In addition, in both the above-mentioned embodiment 1 and the modified example of the above-mentioned embodiment 2, not only a part of the outer surface 23a, 23a/27c, 27c of the support part 22, but also the entire surface may be formed with an uneven shape. Furthermore, the method of forming the uneven shape is not limited to forming a plurality of linear protrusions 23b, ..., 23b. The uneven shape may be formed by forming a plurality of linear grooves on the outer surface 23a, 23a/27c, 27c of the support part 22, or the uneven shape may be formed by forming a plurality of convex portions or concave portions.

In addition, in the above-mentioned first and second embodiments, the cloth C was applied as a surface material to the decorative surfaces of the pair of wall base materials 10, 10 (the front surface of the front wall base material 10 and the rear surface of the rear wall base material 10), but the surface material applied to the decorative surfaces of the pair of wall base materials 10, 10 is not limited to the cloth C. For example, a non-combustible decorative material with a thickness of about 3 mm (e.g., Gravio LS manufactured by Daiken Kogyo Co., Ltd.) can be used as the surface material. In this case, since the surfaces of the pair of wall base materials 10, 10 are covered with a non-combustible material, they can be used in places near a fire source, such as kitchens. In other words, if the surface material is a non-combustible decorative board, they can be used anywhere in the room.

Also, when the surface material is a non-combustible decorative panel, as in the case of using cloth C as the surface material in the above-mentioned embodiments 1 and 2, the width of the frame body 21 of the opening frame 20 can be formed to be about 4 to 10 mm longer than the thickness of the wall W so that the frame body 21 protrudes about 2 to 5 mm (preferably 3 mm or more) forward and backward from the front and rear faces of the wall W, and decorative materials such as non-combustible decorative panels can be secured without using trim materials. Then, by cutting the non-combustible decorative material to fit the protruding parts of the frame body 21, the ends of the non-combustible decorative material become less noticeable, making end processing easier.

The present invention is useful for an opening frame for forming a non-rectangular opening having a curved portion in an interior wall, and an opening structure equipped with the same.

REFERENCE SIGNS LIST 1 Opening structure 2 Opening 3 Cutout 10 Wall base material 20 Opening frame 21 Frame body 22 Support portion 23 Leg 23a Outer surface 25 Engagement portion 27a Leg 27c Outer surface 28 Engagement portion W Wall

Claims (7)

An opening frame that borders a non-rectangular opening formed in a wall,
a plate-shaped frame body portion that extends along the periphery of the cutout of a pair of wall base materials constituting a part of the wall in which the cutout that becomes the opening is formed, and that shields the space between the pair of wall base materials;
a support portion that is inserted between the pair of wall base materials and fixed to the pair of wall base materials and supports the frame main body portion;
The frame body is made of a first soft material and is configured to be deformable by hand. The opening frame according to claim 1,
The support portion is
protruding from one side surface of the frame body and extending in the longitudinal direction of the frame body,
An opening frame, characterized in that it is made of a second soft material which is the same as or different from the first soft material, is integral with the frame main body, and is configured to be deformable by hand. The opening frame according to claim 2,
The opening frame is characterized in that the support portion comprises a pair of plate-shaped legs each protruding from one surface of the frame main body portion and extending parallel to each other in the longitudinal direction of the frame main body portion. The opening frame according to claim 1,
The support portion is configured separately from the frame main body portion,
The frame body portion and the support portion are each provided with an engagement portion that engages with each other,
An opening frame characterized in that the engagement portions of the frame main body portion and the support portion are configured such that, when engaged with each other, the frame main body portion is attached to and supported by the support portion. The opening frame according to claim 4,
The support portion is made of a second soft material which is the same as or different from the first soft material and is manually deformable, and is inserted between the pair of wall base materials and extends along the outer periphery of the cutout. In the opening frame according to any one of claims 1 to 5,
The support portion has two outer surfaces that abut against the inner surfaces of the pair of wall base materials,
The opening frame is characterized in that at least a portion of each of the outer surfaces is formed into an uneven shape. An opening structure for forming a non-rectangular opening in a wall,
A pair of wall base members constituting a part of the wall in which a cutout that becomes the opening is formed;
and an opening frame that borders the opening,
An opening structure, wherein the opening frame is an opening frame according to any one of claims 1 to 5.