JP7801920B2 - Building materials and methods for manufacturing building materials - Google Patents

Description

This disclosure relates to building materials and methods for manufacturing building materials.

The flush panel (door and fixture) described in Patent Document 1 comprises a frame, two face plates, and a core. The frame and each face plate are made of wood (wood or solid wood). The core is a cylindrical sheet of cardboard or cardboard, etc., and is placed inside the frame. The axial length of the core is aligned with the projection direction of the frame. The length of the core in the axial length direction is greater than the projection dimension of the frame. The two face plates sandwich the frame from the front and back, and each face plate is adhered to the visible surface of the frame and the end surface of the core. The core is compressed between the two face plates, supporting each face plate from inside the frame. As a result, dents in the face plates can be prevented.

Japanese Patent Application Laid-Open No. 2006-299510

For example, as humidity increases, the frame and facing materials may expand, causing the building materials to warp.
One way to prevent warping of building materials is to use a core. However, in the case of the flush panel described in Patent Document 1, the core must be compressed between two face plates, and therefore the core is more easily deformed than the frame and face plates, and the frame and face plates cannot maintain their shapes.

The purpose of this disclosure is to provide building materials and methods for manufacturing building materials that can suppress warping.

The fittings disclosed herein comprise a wooden frame and a wooden panel glued to the visible surface of the frame so as to cover the opening of the frame. Inside the frame, multiple paper cylinders are arranged with their axial length aligned with the visible direction of the frame, and the end faces of the cylinders are glued to the inner surface of the panel, with the rigidity of the cylinders against radial bending being greater than both the rigidity of the frame against longitudinal bending and the rigidity of the panel against longitudinal bending.

In the present disclosure, a facing material is adhered to the visible surface of the frame so as to cover the opening of the frame. A plurality of cylinders are arranged inside the frame. The fitting has a flush structure, and the plurality of cylinders function as the fitting core.
Each cylinder is made of paper. The frame and the surface material are made of wood. The frame, the surface material, and the cylinder expand when they absorb moisture, for example.
As the frame and facing materials expand, the building materials tend to warp.

The cylinder expands radially, and the axial direction of the cylinder is aligned with the projection direction of the frame. Therefore, the expansion of the cylinder does not contribute to warping of the fixture.
Furthermore, since the end face of the cylinder is bonded to the inner surface of the face material (the face of both sides of the face material that faces the frame body), the cylinder reinforces the face material.
Furthermore, the rigidity of the cylinder against bending in the radial direction is greater than the rigidity of the frame against bending in the longitudinal direction and the rigidity of the face material against bending in the longitudinal direction. In other words, the cylinder is less likely to deform in the direction that warps the frame and face material. Therefore, the cylinder maintains the shape of the frame and face material.
As a result of the above, warping of the building materials can be suppressed by using the core.

The fixture disclosed herein is characterized in that the cylinder is made of paper rolled up multiple times.

In this disclosure, a cylinder formed by wrapping paper multiple times has greater rigidity in the longitudinal and radial directions and is less likely to deform than a cylinder formed from a single sheet of paper. Such a cylinder can be easily obtained, for example, by wrapping ribbon- or sheet-shaped paper multiple times around an appropriate circular tube.

The building fixture disclosed herein is characterized in that a reinforcing material is arranged inside the frame body to reinforce the frame body.

In this disclosure, the reinforcing material reinforces the frame body from the inside, so there is no risk of the frame body warping.

The fixture disclosed herein is characterized in that the cylinder is fixed to the frame, the reinforcing material, or another cylinder by stapling.

This disclosure prevents individual cylinders from becoming misaligned and allows the fixed components to reinforce each other.

The building fixture according to the present disclosure is characterized in that the volume ratio R of the plurality of cylinders satisfies equation (1).
R=P/D×100<21%…(1)
however,
P: Area where multiple cylinders are bonded to the surface material D: Visible area of the fixture

In this disclosure, multiple cylinders with a volume ratio R that satisfies equation (1) are placed inside a frame and glued to the facing. The more cylinders there are, the more warping of the fixture is suppressed, but arranging many cylinders inside a frame is difficult or cumbersome, and the cost of preparing many cylinders is high. When R<21%, it is possible to practically suppress warping of the fixture while making it easier to arrange the cylinders and reducing the cost of the cylinders.

The manufacturing method for building fixtures according to the present disclosure is a manufacturing method for manufacturing building fixtures comprising a wooden frame body and a wooden face material glued to the visible surface of the frame body, characterized in that a plurality of paper cylinders are placed inside the frame body with their axial length direction aligned with the visible direction of the frame body, adhesive is applied to the visible surface of the frame body and the end surfaces of the cylinders, and the face material is glued to the visible surface of the frame body and the end surfaces of the cylinders.
The manufacturing method for building fixtures according to the present disclosure is a manufacturing method for manufacturing building fixtures comprising a wooden frame body and a wooden face material glued to the visible surface of the frame body, characterized in that a plurality of paper cylinders whose axial direction is along the visible direction of the frame body are arranged inside the frame body, and whose rigidity against radial bending is greater than the rigidity against longitudinal bending of the frame body and the rigidity against longitudinal bending of the face material, respectively, and adhesive is applied to the visible surface of the frame body and the end surfaces of the cylinders, and the face material is glued to the visible surface of the frame body and the end surfaces of the cylinders.

In the present disclosure, a facing is adhered to the visible surface of the frame so as to cover the opening of the frame. A plurality of cylinders are arranged inside the frame. The fitting has a flush structure, and the plurality of cylinders function as the fitting core.
Each cylinder is made of paper. The frame and the surface material are made of wood. The frame, the surface material, and the cylinder expand when they absorb moisture, for example.
As the frame and facing materials expand, the building materials tend to warp.

The cylinder expands radially, and the axial direction of the cylinder is aligned with the projection direction of the frame. Therefore, the expansion of the cylinder does not contribute to warping of the fixture.
Furthermore, since the end face of the cylinder is bonded to the inner surface of the face material (the face of both sides of the face material that faces the frame body), the cylinder reinforces the face material.
As a result of the above, warping of the building materials can be suppressed by using the core.

When manufacturing building materials, adhesive is applied to the visible surface of the frame and the end surface of the cylinder, so a sufficient amount of adhesive can be applied. If adhesive were applied to the facing material, it would end up being applied to parts of the facing material that do not come into contact with either the frame or the cylinder, resulting in wasted adhesive.

The fixture disclosed herein is characterized in that when the cylinders are placed inside the frame, a predetermined number of cylinders are placed according to specifications.

In this disclosure, an appropriate number of cylinders according to specifications are placed inside the frame. Because there are not too few cylinders, warping of the fixture can be sufficiently suppressed for practical use. Furthermore, because there are not too many cylinders, the cylinders can be easily arranged and the cost of the cylinders can be reduced.

The building fixtures and building fixture manufacturing methods disclosed herein can reduce warping of the building fixtures.

FIG. 2 is a partially cutaway front view of the fixture according to the first embodiment. 2 is a cross-sectional view taken along line II-II in FIG. 1. FIG. FIG. 10 is a front view illustrating the arrangement of the cylinders. FIG. 10 is a front view of the fixture according to embodiment 2. FIG. 10 is a front view of a fixture having another configuration according to embodiment 2. FIG. 10 is a front view of a fixture according to embodiment 3. FIG. 10 is a front view of a fixture having another configuration according to embodiment 3.

The following describes an embodiment of the present disclosure. In the following description, arrows indicating up and down, front and back, and left and right are used in the figures.

Embodiment 1.
FIG. 1 is a partially cutaway front view of a fixture according to a first embodiment.
In the figure, reference numeral 1 denotes a fixture, and the fixture 1 has a frame body 2.
The frame body 2 is rectangular and has two vertical frames 21 and two horizontal frames 22 .
The two vertical frames 21 extend vertically and face each other laterally. The two horizontal frames 22 extend horizontally. One of the two horizontal frames 22 spans the upper ends of the two vertical frames 21, and the other spans the lower ends of the two vertical frames 21. Adjacent vertical frames 21 and horizontal frames 22 are fixed to each other, for example, by screws. The vertical frames 21 and horizontal frames 22 are made of wood, for example, LVL (laminated veneer lumber).

Reinforcing members 31 to 36 that reinforce the frame body 2 are arranged inside the frame body 2. The projected dimensions (front-to-back length) of each of the reinforcing members 31 to 36 are equal to the projected dimensions of the frame body 2. The material of each of the reinforcing members 31 to 36 is not limited, but may be wood, for example. Each of the reinforcing members 31 to 36 is fixed to the frame body 2, for example, by screws.
In this embodiment, a reinforcing member 31, which is a horizontal member, is fixed to the upper horizontal frame 22. The reinforcing member 31 spans two vertical frames 21. A reinforcing member 32, which is a vertical member, is bridged between the reinforcing member 31 and the lower horizontal frame 22. Two reinforcing members 31 are installed side by side on the left and right. The reinforcing members 31 are spaced apart by an appropriate distance. The reinforcing members 31, 32 prevent the horizontal frame 22 from bending inward or outward from the frame body 2.

Furthermore, a horizontal reinforcing member 33 is stretched across the vertical frame 21 and the reinforcing member 32. Multiple reinforcing members 33 (five in the figure) are arranged side by side, one above the other. The reinforcing members 33 are spaced an appropriate distance apart. Similarly, multiple reinforcing members 34 (two in the figure) are stretched across the two reinforcing members 32. Reinforcing members 32 to 34 prevent the vertical frame 21 from bending inward or outward from the frame body 2.

A reinforcing member 35 is fixed to the middle of the right-side vertical frame 21 in the longitudinal direction. The reinforcing member 35 spans two adjacent reinforcing members 33. The reinforcing member 35 is, for example, a plurality of vertically extending rods adjacent to each other (see FIG. 3, described later).
The reinforcing members 36 are fixed to the corners of the frame body 2. In the drawing, three reinforcing members 36 are arranged at the upper right corner and the left and right lower corners.
In this embodiment, the reinforcing members 31 to 36 are arranged asymmetrically, but they may also be arranged symmetrically.

The fixture 1 is provided with a handle 11.
The handle 11 is fixed to the reinforcing members 33 and 35 that are adjacent to the right-side vertical frame 21 and reinforcing member 35, respectively, among the multiple reinforcing members 33. When the fitting 1 is a hinged door, the handle 11 comprises, for example, a handle to be grasped by a user, and a base that supports the handle and is fixed to the reinforcing members 33 and 35. One handle 11 is provided on each of the front and rear sides of the frame body 2.

FIG. 2 is a cross-sectional view taken along line II-II in FIG.
As shown in FIGS. 1 and 2, the fitting 1 includes two panels 4.
Each of the two panel members 4 has a rectangular shape. The two panel members 4 face each other from the front to the back. Each panel member 4 is made of wood, for example, MDF (medium density fiberboard).

The frame body 2 is sandwiched between two panel members 4. The top, bottom, left, and right dimensions of the panel member 4 are equal to the top, bottom, left, and right dimensions of the frame body 2. The panel member 4 covers the opening of the frame body 2. The inner surface (rear surface) of the front panel member 4 is adhered to the front facing surfaces (front faces) of the frame body 2 and each of the reinforcing members 31 to 36. Similarly, the inner surface of the rear panel member 4 is adhered to the rear facing surfaces of the frame body 2 and each of the reinforcing members 31 to 36.

The outer surface of the face plate 4 and the left and right end faces of the frame 2 are each decorated with, for example, a decorative sheet (not shown). The handle 11 mentioned above is fixed to the reinforcing members 33, 35, for example, by a screw passing through the base of the handle 11 and the face plate 4 covered with the decorative sheet.

The fixture 1 comprises a plurality of cylinders 5 .
The length of the cylinder 5 in the axial direction is equal to the expected dimension of the frame 2. The cylinder 5 is made by wrapping paper (not shown) multiple times. For example, the inner diameter of the cylinder 5 is 3 inches, and the thickness of the cylinder 5 is 10 mm.

The cylinder 5 is disposed inside the frame body 2 so that its axial length is aligned with the projection direction (front-rear direction) of the frame body 2 and part of its circumferential surface is in contact with other members. The cylinder 5 is fixed to an adjacent member by stapling.
The member to which the cylinder 5 is fixed by stapling is the vertical frame 21 or horizontal frame 22 of the frame 2, or a member (reinforcements 31 to 36, another cylinder 5, etc.) directly or indirectly fixed to the frame 2. When the cylinder 5 is fixed to the vertical frame 21, horizontal frame 22, or reinforcing member 31 to 36, it is desirable that the staple (not shown) straddles the end face of the cylinder 5 and the visible face of the vertical frame 21, horizontal frame 22, or reinforcing member 31 to 36. When cylinders 5 are fixed to each other, it is desirable that the staple (not shown) straddles the end face of each of the two cylinders 5.

The front end face of the cylinder 5 is bonded to the inner surface of the front face material 4. The rear end face of the cylinder 5 is bonded to the inner surface of the rear face material 4.
The rigidity of the cylinder 5 against bending in the radial direction (for example, bending in the direction indicated by the dashed arrow in Fig. 2) is greater than the rigidity of the frame 2 against bending in the longitudinal direction (for example, bending in the direction indicated by the open arrow in Fig. 2). Similarly, the rigidity of the cylinder 5 against bending in the radial direction is greater than the rigidity of the face material 4 against bending in the longitudinal direction.

The volume ratio R of the plurality of cylinders 5 satisfies the formula (1).
R=P/D×100<21%…(1)
Here, P is the area where multiple cylinders 5 are glued to the surface material 4, and D is the visible area of the building fixture 1.

The above-described fitting 1 has a flush structure, and the multiple cylinders 5 function as the core of the fitting 1.
The frame 2, the face material 4, and the cylinder 5 expand, for example, by absorbing moisture. Because the fitting 1 is plate-shaped, as the frame 2 and the face material 4 expand, the fitting 1 tends to warp, for example, in the direction indicated by the white arrow in Figure 2.

On the other hand, the cylinder 5 expands in the radial direction. Therefore, the expansion of the cylinder 5 does not promote warping of the fitting 1.
Furthermore, since the cylinder 5 is fixed to other members by stapling or adhesive, the cylinder 5 is prevented from shifting position, and the fixed members can reinforce each other (for example, between the frame body 2 or the surface material 4 and the cylinder 5, or between the cylinders 5 themselves).

Moreover, the rigidity of the cylinder 5 against bending in the radial direction is greater than the rigidity of the frame 2 against bending in the longitudinal direction and the rigidity of the face material 4 against bending in the longitudinal direction. In other words, the cylinder 5 is less likely to deform in the direction that warps the frame 2 and the face material 4. Therefore, the cylinder 5 maintains the shape of the frame 2 and the face material 4.
As a result of the above, warping of the building material 1 can be suppressed by using the core.

A cylinder 5 formed by wrapping paper multiple times has greater rigidity in the longitudinal and radial directions and is less likely to deform than a single sheet of paper formed into a cylindrical shape. Such a cylinder 5 can be easily obtained, for example, by wrapping ribbon-shaped or sheet-shaped paper multiple times around an appropriate circular tube to form a spiral or flat paper tube, and then cutting the formed spiral or flat paper tube to the desired length. The paper to be wrapped around the aforementioned circular tube can be, for example, liner paper, kraft paper, or cardboard.

Next, the manufacturing procedure for the fitting 1 will be described.
FIG. 3 is a front view of the frame 2. FIG.
The worker prepares two vertical frames 21 and two horizontal frames 22 to form the frame body 2. The worker prepares reinforcing members 31 to 36 to reinforce the frame body 2. Because the reinforcing members 31 to 36 reinforce the frame body 2 from the inside, there is no risk of the frame body 2 being distorted during or after the manufacturing of the fitting 1.

FIG. 4 is a front view for explaining the arrangement of the cylinder 5. As shown in FIG.
The designer determines the number of cylinders 5 so that the volume ratio R of the multiple cylinders 5 satisfies equation (1) according to the specifications of the fitting 1. The worker prepares the number of cylinders 5 determined in advance by the designer.
For example, when determining the number of cylinders 5, the designer determines the outer diameter, thickness, and length of each cylinder 5, as well as the number and arrangement of the cylinders 5, depending on the warping resistance required of the fitting 1 and the internal dimensions of the frame 2. In this case, when preparing the cylinders 5, the worker procures or manufactures cardboard tubes with the outer diameter and thickness predetermined by the designer, and cuts the procured or manufactured cardboard tubes to the predetermined length.

The cylinder 5 may be a dedicated product for manufacturing the fitting 1, or a general-purpose product formed from a commercially available paper tube. Alternatively, the cylinder 5 may be a recycled product formed from, for example, the core material that a commercially available decorative sheet was wrapped around at the time of sale. In the case of a recycled product, the manufacturing cost of the fitting 1 can be reduced because waste material is used, and the amount of waste material can be reduced, which is environmentally friendly.
When the size of each of the multiple cylinders 5 and the type of paper that makes up the cylinders 5 are the same, costs can be reduced compared to when cylinders 5 that are different in size and type of paper from other cylinders 5 are mixed in.

After preparing the multiple cylinders 5, the worker places each of the multiple cylinders 5 in a predetermined position inside the frame body 2, with the axial length direction aligned with the projection direction of the frame body 2 and each cylinder 5 in contact with other members, and then fixes them to adjacent members using staples.
In this embodiment, 40 cylinders 5 are lined up in the circumferential direction of the frame body 2, and each cylinder 5 is stapled to contact at least one of the vertical frame 21, horizontal frame 22, and reinforcing members 31, 33, 35, and 36. There are no cylinders 5 stapled to reinforcing members 32 and 34, and no cylinders 5 stapled only to other cylinders 5. The multiple cylinders 5 are arranged symmetrically.
The number and arrangement of the cylinders 5 are not limited to those exemplified here.

The more cylinders 5 there are, the more warping of the fitting 1 is suppressed, but arranging a large number of cylinders 5 inside the frame 2 is difficult or cumbersome, and the cost of preparing a large number of cylinders 5 increases. When R<21%, it is possible to practically suppress warping of the fitting 1 while making it easier to arrange the cylinders 5 and reducing the cost of the cylinders 5.

After placing the cylinder 5 inside the frame 2, the worker applies adhesive (not shown) to the visible surface of the frame 2 and the end surface of the cylinder 5, and then adheres the face material 4 to the visible surface of the frame 2 and the end surface of the cylinder 5. The worker performs this operation on both the front and rear face materials 4 (see FIG. 2).
The worker also applies a decorative sheet and fixes the handle 11 (see FIG. 1).

When manufacturing the fitting 1, the adhesive is applied to the facing surfaces of the frame 2 and the reinforcing members 31-36 and to the end face of the cylinder 5, so a necessary and sufficient amount of adhesive can be applied. If adhesive were applied to the face material 4, the adhesive would be applied to parts of the face material 4 that do not come into contact with the frame 2, the reinforcing members 31-36, or the cylinder 5, resulting in wasted adhesive.
Because the cylinder 5 is configured like multiple sheets of paper stacked radially, the end face of the cylinder 5 absorbs adhesive more easily than one side of the face material 4. By visually checking the condition of the end face of the cylinder 5 to which adhesive has been applied, the worker can determine whether a necessary and sufficient amount of adhesive has been applied to the end face of the cylinder 5.

The cylinder 5 is not limited to being made of paper, but may also be made of wood, bamboo, synthetic resin, etc. The same fitting 1 may be equipped with multiple cylinders 5 made of different materials. However, the cylinders 5 must be able to be adhered to the surface material 4 by the adhesive used to adhere the frame 2 and the surface material 4.
The cylinder 5 does not have to be fixed to the frame 2 or the reinforcing members 31 to 36, or to each other. In this case, the cylinder 5 does not have to be configured to be fixable by stapling.
The core of the fitting 1 is not limited to a plurality of cylinders 5, but may be, for example, a plurality of rectangular tubes.
The volume ratio R of the plurality of cylinders 5 does not have to satisfy the formula (1). In this case, the plurality of cylinders 5 may be packed inside the frame 2 in a state compressed in the vertical and horizontal directions.

The size, number, and arrangement of the reinforcing members 31-36 and cylinder 5 are not limited to those exemplified in embodiment 1. These are designed appropriately according to the specifications of the fitting 1. The fitting 1 shown below is substantially similar to the fitting 1 of embodiment 1, except for the configuration of the reinforcing members 31-36 and cylinder 5. Differences from embodiment 1 will be explained below, and components that are the same as those in embodiment 1 will be assigned the same reference numerals and their explanation will be omitted.

Embodiment 2.
FIG. 5 is a front view of the fitting 1 according to the second embodiment.
FIG. 6 is a front view of a fitting 1 having another configuration according to the second embodiment.
In the front views of FIG. 5 and subsequent figures, the front panel 4 is omitted from the illustration.
In the case of the fitting 1 of the first embodiment, five reinforcing members 33 are arranged in a vertical line between the vertical frame 21 and the reinforcing member 32. On the other hand, in the case of the fitting 1 shown in Fig. 5, two reinforcing members 33 are arranged in a vertical line, and in the case of the fitting 1 shown in Fig. 6, no reinforcing member 33 is present.
In this embodiment, four reinforcing members 36 are arranged at the four corners of the frame 2 .

The fixture 1 shown in Fig. 5 includes a plurality of cylinders 51 instead of the cylinder 5. The difference between the cylinder 51 and the cylinder 5 is that the cylinder 51 has an inner diameter of 10 inches and a thickness of 5 mm.
The outer diameter of the cylinder 51 is equal to the distance between the vertical frame 21 and the reinforcing member 32. The cylinder 51 spans the vertical frame 21 and the reinforcing member 32 and is fixed to both the vertical frame 21 and the reinforcing member 32 by staples. The cylinder 51, together with the reinforcing members 32 and 34, contributes to preventing the vertical frame 21 from bending.

6 includes a plurality of cylinders 51 and 52 instead of the cylinder 5. The difference between the cylinder 52 and the cylinder 5 is that the inner diameter of the cylinder 52 is 6 inches.
The cylinder 52 is fixed by staples to each of the adjacent members, spanning two cylinders 51 or spanning a cylinder 51 and a member other than the cylinder 51 (the vertical frame 21, the reinforcing members 31, 35, 36, or the cylinder 52 in the drawing). The multiple cylinders 51, 52 are lined up so as to span the two upper and lower horizontal frames 22 via the reinforcing members 31 and the reinforcing members 36 at the lower corners, which helps prevent the horizontal frames 22 from bending.
In the fitting 1 shown in FIG. 6, a reinforcing member 35 is fixed to two vertical frames 21 on the left and right, and reinforcing members 31 to 36 are arranged symmetrically on the left and right.

Embodiment 3.
FIG. 7 is a front view of the fitting 1 according to the third embodiment.
FIG. 8 is a front view of a fitting 1 having another configuration according to the third embodiment.
The fitting 1 of the present embodiment 1 is similar to the fitting 1 of the embodiment 2 shown in FIG. 6, but is provided with a reinforcing member 37 instead of the reinforcing members 32 and 34.
The reinforcing member 37 is a horizontal member that is bridged between the two vertical frames 21 on the left and right, and prevents the vertical frames 21 from bending inward or outward from the frame body 2. Note that a plurality of reinforcing members 37 may be arranged side by side, one above the other.

In the case of the fitting 1 shown in Figure 7, multiple cylinders 51 are arranged in a space surrounded by reinforcing members 31, 37 and two vertical frames 21. The multiple cylinders 51 are lined up so as to span the two vertical frames 21. Therefore, the multiple cylinders 51 contribute to preventing the vertical frames 21 from bending.
Unlike the fitting 1 shown in FIG. 6, the fitting 1 shown in FIG. 7 does not have a cylinder 52, but has a cylinder 51 that is fixed only to another cylinder 51 different from itself.

Unlike the fitting 1 shown in Figure 7, the fitting 1 shown in Figure 8 only has a cylinder 5. Because the cylinder 5 has a smaller diameter than the cylinders 51 and 52, a large number of cylinders 5 can be arranged inside the frame body 2. Because the large number of cylinders 5 reinforce the vertical frames 21, bending of the vertical frames 21 can be prevented even without arranging multiple cylinders 5 across two vertical frames 21.
In this embodiment, the building fixture 1 does not have any reinforcing material spanning the two horizontal frames 22, but the horizontal frames 22 are less likely to bend than the vertical frames 21, and the reinforcing material 31 and each of the multiple cylinders 5, 51 reinforce the horizontal frames 22, so bending of the horizontal frames 22 can be prevented.

The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is intended to encompass not only the above-described meaning, but also the meaning equivalent to the claims and all modifications within the scope of the claims.

1 Door and window 2 Frame 31-37 Reinforcement material 4 Surface material 5, 51, 52 Cylinder

Claims (7)

A wooden frame and
a wooden surface material adhered to the visible surface of the frame body so as to cover the opening of the frame body,
A plurality of paper cylinders are arranged inside the frame body so that the axial direction is along the projection direction of the frame body,
The end surface of the cylinder is bonded to the inner surface of the face material,
A fixture characterized in that the rigidity of the cylinder against radial bending is greater than both the rigidity of the frame body against longitudinal bending and the rigidity of the face material against longitudinal bending. The fixture described in claim 1, characterized in that the cylinder is made of paper rolled up multiple times. The fitting according to claim 1 or 2, characterized in that a reinforcing material is arranged inside the frame body to reinforce the frame body. The fixture described in claim 3, characterized in that the cylinder is fixed to the frame, the reinforcing material, or another cylinder by stapling. 5. The fixture according to claim 1, wherein the volume ratio R of the plurality of cylinders satisfies the following formula (1).
R=P/D×100<21%…(1)
however,
P: Area where multiple cylinders are bonded to the surface material D: Visible area of the fixture A wooden frame and
and a wooden surface material adhered to the visible surface of the frame body.
A plurality of paper cylinders are arranged inside the frame body, with their axial length direction aligned with the projection direction of the frame body, and their rigidity against radial bending is greater than the rigidity against longitudinal bending of the frame body and the rigidity against longitudinal bending of the face material ,
Applying an adhesive to the visible surface of the frame and the end surface of the cylinder;
A method for manufacturing a fixture, characterized in that the surface material is adhered to the visible surface of the frame body and the end surface of the cylinder. The method for manufacturing a fitting described in claim 6, characterized in that when placing the cylinders inside the frame, a predetermined number of cylinders are placed according to specifications.