JP2002011688A - Building material, and v-groove cutting edge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building material which less easily generates any whitening phenomenon or cracking in a folded part, or generates any excessive phenomenon of a sheet in the folding part, and provide a V-groove cutting edge suitable for the manufacture of the building material. SOLUTION: In the building material in which has the sheet 1 stuck to a face side of a flat core 2, forms a V-groove 4 on the back side of the core 2, and is folded to the back side of the core 2 by making use of the V-groove 4 to form the folded part, a flat portion 6 of the width of 0.4-0.8 mm is formed at a tip of the V-groove 4, and a remaining margin 7 of 0.1-0.3 mm of the core is formed at the position of the tip of the V-groove. A flat portion of the width of 0.4-0.8 mm is formed at a tip of the V-groove cutting edge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building material having a V-shaped groove formed in a building material for a house, furniture, a door and the like, which can be bent and a V-groove machining blade used for manufacturing the building material. .

[0002]

2. Description of the Related Art In recent years, a V-groove is formed on the back surface of a plate material in which a sheet material for surface decoration is adhered to the surface of a flat core material, and the V-groove is used to move the plate material to the back surface. A building material that can be bent to form a bent portion is used. For example, as shown in FIG. 7, a flat core material 2 composed of plywood or the like and a sheet material 1 composed of a synthetic resin film alone such as a polypropylene film or a laminate material of a synthetic resin film and a thin veneer are bonded. Further, a building material 3 in which a V-groove 4 is formed on the back surface of the core material 2 using a V-groove machining blade can be exemplified. As shown in FIG. 8, such a building material 3 can be bent toward the back side of the core material 2 by using a V-groove to form a bent portion 5. Functions as a cosmetic material.

[0003]

However, in a building material in which a bent portion can be formed by bending a back surface of a core material using a conventional V-groove, a whitening phenomenon or a crack occurs in the formed bent portion. Alternatively, there is a problem in that the sheet material is excessively generated and the appearance of the door or door of a house is poor.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a building material capable of forming a bent portion by bending a back surface of a core using a V-groove. There is hardly whitening phenomenon and cracks in the bent part,
Another object of the present invention is to provide a building material in which a phenomenon of a sheet material is less likely to occur in a bent portion. And furthermore, the whitening phenomenon and the crack are hardly generated in the bent portion, and
An object of the present invention is to provide a V-grooving blade suitable for manufacturing a building material in which a phenomenon of a sheet material hardly occurs in a bent portion.

[0005]

According to the construction material of the present invention, a sheet material is stuck on a flat core material surface and a V-groove is formed on the back surface of the core material. In a building material that can be bent to form a bent portion by using the V-groove to the back side of the core material, the tip of the V-groove is 0.4 to 0.8 mm.
A building material characterized in that a flat portion having a width is formed and a margin of a core material at a V-groove tip position is set to 0.1 to 0.3 mm.

In the construction material according to the first aspect of the invention, V
Since a flat portion having a width of 0.4 mm or more is formed at the tip of the groove, stress concentration at the time of bending is reduced, cracking and whitening at the bent portion can be prevented, and the width of the flat portion is reduced. Is limited to 0.8 mm or less, so that the phenomenon of the sheet material in the bent portion is less likely to occur. In addition, since the margin of the core material at the V groove tip position is limited to 0.1 mm or more, the sheet material on the surface is not cut at the time of the V groove processing, and the margin is limited to 0.3 mm or less. As a result, it is possible to prevent the core material from breaking when bent.

The building material according to the second aspect of the present invention is a core material divided by a V-groove, and extends outward from the bent portion when the bent portion is formed by bending the back surface side. For the two cores, a substantially step-shaped contact surface is formed at a corner formed by the back surface of one of the cores and the end face on the bent portion side, and the back surface of the other core material and the bent portion side are formed. The corner formed by the end face is formed in a shape corresponding to the substantially step-shaped contact surface, and when a bent portion is formed,
2. The building material according to claim 1, wherein a corner formed by the back surface of the other core material and the end surface on the bent portion side is in contact with the substantially stepped contact surface. 3.

In the construction material according to the second aspect of the present invention, when the bent portion is formed by bending the back surface side, the substantially stepped contact surface formed on one of the core materials is placed on the other core material. Since the corner portions of the sheet material abut, the movement of each core material is suppressed at the abutting portion, so that the phenomenon of the sheet material is less likely to occur at the bent portion.

According to a third aspect of the present invention, there is provided a V-grooving blade for building materials according to the first or second aspect of the present invention, wherein the tip of the V-groove is 0.4 to 0.1 mm. This is a V-groove processing blade forming a flat portion with a width of 8 mm.

In the V-grooving blade according to the third aspect of the present invention, a flat portion having a width of 0.4 to 0.8 mm is formed at the tip thereof. The building material according to claim 2 can be easily manufactured.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a first embodiment according to the present invention.
Shown in FIG. 1 is a cross-sectional view showing a building material 3 before bending. A thin sheet material 1 which is a laminate of a thin veneer and a synthetic resin film is provided on a surface of a flat core material 2 made of plywood or the like. The synthetic resin film is stuck so that the front side is the front side, and the V-groove 4 is formed on the back surface of the core material 2 using a V-groove processing blade. The sheet material 1 may be a laminated material of a veneer sheet in which a veneer sheet and a fibrous sheet are bonded with an adhesive and a synthetic resin film, or a material other than the veneer sheet, for example, wood grain print paper, wood grain. It may be a laminated material of a material such as a patterned metal foil and a synthetic resin film, or may be a single synthetic resin film that has been colored or matted, or may be a sheet material for surface decoration. There are no particular restrictions. As for the V-groove 4, a flat portion 6 having a width of 0.4 to 0.8 mm is formed at the front end, and the remaining margin 7 of the core material at the front end of the V-groove is 0.1 to 0.1 mm.
It is formed to be 3 mm. Thus, the V-groove 4
Since the flat portion 6 having a width of 0.4 to 0.8 mm is formed at the tip of the plate, the stress concentration at the time of bending is reduced, and the bent portion 5 is cracked or whitened at the time of bending as shown in FIG. Can be prevented from occurring, and the phenomenon of the sheet material 1 in the bent portion 5 hardly occurs. 3 is an enlarged view of a part of the bent portion 5 in FIG. 2 for explaining the phenomenon, but the part of the sheet material 1 referred to here is a part shown as A in FIG. , In which the sheet material 1 is sagging outside the bent portion 5.

Further, in this embodiment, V shown in FIG.
The remaining margin 7 of the core material 2 at the tip of the groove 4 is 0.1 to 0.3 m.
Since it is set to m, the sheet material 1 on the front surface is not cut at the time of V-groove processing, and cracking in the bent portion 5 of the core material 2 when it is bent as shown in FIG. 2 can be prevented.

Here, an embodiment of a V-groove machining blade will be described. In the first embodiment relating to the above-described building material, a rotary blade having a flat portion having a width of 0.4 to 0.8 mm is used as a V-groove processing blade for processing the building material 3. When processed, the V-groove of the building material 3 is 0.4-
It is easy to have the flat portion 6 having a width of 0.8 mm. Regarding the material of this V-groove machining blade,
There is no particular limitation, and various metal materials and inorganic materials can be used. Further, the V-groove processing blade of this embodiment is a rotary blade, but the V-groove processing blade in the present invention is not limited to a rotary blade, and may be a fixed blade.

Next, a second embodiment relating to building materials is shown in FIG. FIG. 4 shows one V-shaped groove having an angle of 90 °.
It is sectional drawing which shows the building material 3 in the state which formed the groove | channel and bent using the V groove | channel, About the V groove | channel, 0.4-1. A flat portion having a width of 8 mm is formed, and a margin of the core material at the tip of the V-groove is formed to be 0.1 to 0.3 mm. As shown in FIG. 4, the building material 3 of the second embodiment is a core material divided by a V-groove, and when the bent portion 5 is formed, the core material is bent with the bent portion 5 interposed therebetween. The two core members 2a and 2b extending outward from the portion 5 have substantially stepped contact surfaces 9 at corners 8a formed by the back surface of one of the core members 2a and the end surface on the bent portion side. And the corner 8b formed by the back surface of the other core member 2b and the end surface on the bent portion side is formed in a shape corresponding to the substantially step-shaped contact surface 9, and the building material 3 is formed. When the bent portion 5 is formed by bending, the corner portion 8b formed by the back surface of the other core member 2b and the end surface on the bent portion side comes into contact with the substantially step-shaped contact surface 9. I have. As described above, when the bent portion 5 is formed, the corner 8b of the other core 2b abuts on the substantially step-shaped contact surface 9 formed on the one core 2a. Since the movement of 2a, 2b is suppressed at this contact portion, the phenomenon is less likely to occur in the sheet material 1 on the front surface side of the bent portion 5.

Next, a third embodiment is shown in FIGS. FIG. 5 is a sectional view showing the building material 3 before bending. In the third embodiment, as shown in FIG.
In FIG. 6, two V-grooves 4a and 4b having an angle of 45 ° are formed, and these V-grooves 4a and 4b can be used to bend as shown in FIG. And each V
Regarding the grooves 4a and 4b, similarly to the first embodiment, a flat portion having a width of 0.4 to 0.8 mm is formed at the end, and the margin of the core material at the V groove end position is 0.1 to 0.1. 0.3m
m. In the building material 3 according to the third embodiment, as shown in FIG.
b, the two core members 2a and 2b extending outward from the bent portions 5a and 5b when the bent portions 5a and 5b are formed as shown in FIG.
For a and 2b, a substantially step-shaped contact surface 9 is formed at a corner 8a formed by the back surface of one core material 2a and the end face on the bent portion side, and the back surface and bending of the other core material 2b are formed. The corner 8b formed with the end face on the part side is formed in a shape corresponding to the substantially step-shaped contact surface 9, and when the building material 3 is bent to form the bent portions 5a and 5b, A corner 8b formed by the back surface of the other core member 2b and the end surface on the bent portion side is brought into contact with the substantially step-shaped contact surface 9. As described above, when the bent portions 5a and 5b are formed, the substantially step-shaped contact surface 9 formed on one of the cores 2a is formed.
Since the corner 8b of the other core 2b abuts, the movement of each core 2a, 2b is suppressed by this abutment, so that the sheet material 1 on the front surface side of the bent portions 5a, 5b has little phenomenon. Is less likely to occur.

[0017]

The present invention will now be described by way of Examples and Comparative Examples.
This will be described in more detail.

(Example 1) A V-groove was formed by using a plate material (decorative material) in which a 70-μm-thick polypropylene film was adhered to a 2.5-mm-thick MDF substrate (medium-density fiber plate) via an adhesive. A flat portion having a width of 0.4 mm is formed at the end of the V-groove, and a V-groove is formed so that the margin of the core material at the V-groove end position is 0.2 mm. Then, two types of building materials were produced. As described above, in this embodiment, when the bent portion is formed by bending to the back surface side, the two core materials that extend outward from the bent portion are the back surface of one core material and the end surface on the bent portion side. A substantially step-shaped contact surface is formed on the corner formed by the above, and the corner formed by the back surface of the other core material and the end surface on the bent portion side is formed on the substantially step-shaped contact surface. It is formed in a corresponding shape, and when the bent portion is formed, the corner formed by the back surface of the other core material and the end surface on the bent portion side contacts the substantially step-shaped contact surface. I made it. A frame material was manufactured using the building material manufactured in this manner, the condition of the obtained frame material was observed, and the appearance of the bent portion and the presence or absence of a surplus phenomenon of the sheet material in the bent portion were evaluated. The results are shown in Table 1.

(Example 2) In the same manner as in Example 1 except that the flat portion formed at the tip of the V-groove was 0.8 mm wide.
Two types of building materials were prepared, and a frame material was prepared using these materials. The condition of the obtained frame material was observed, and the appearance of the bent portion,
The presence or absence of a surplus phenomenon of the sheet material at the bent portion was evaluated, and the results are shown in Table 1.

Comparative Example 1 The procedure of Example 1 was repeated, except that the flat portion formed at the tip of the V-groove was 0.2 mm wide.
Two types of building materials were prepared, and a frame material was prepared using these materials. The condition of the obtained frame material was observed, and the appearance of the bent portion,
The presence or absence of a surplus phenomenon of the sheet material at the bent portion was evaluated, and the results are shown in Table 1.

Comparative Example 2 The procedure of Example 1 was repeated, except that the flat portion formed at the tip of the V-groove was 1.0 mm wide.
Two types of building materials were prepared, and a frame material was prepared using these materials. The condition of the obtained frame material was observed, and the appearance of the bent portion,
The presence or absence of a surplus phenomenon of the sheet material at the bent portion was evaluated, and the results are shown in Table 1.

(Comparative Example 3) In Comparative Example 2, two core members which extend outward from the bent portion when the bent portion is formed by being bent to the back surface side, and the back surface of one of the core members and the bent portion are formed. This is an example in which two types of building materials are produced without forming a substantially step-shaped contact surface at a corner formed by the end face of the section. That is, the angle of the V-groove is 90
In the case of °, a corner formed by the back surface of the core material and the end face on the bent portion side is formed in the shape shown in FIG. 2, and when the angle of the V-groove is 45 °, the shape shown in FIG. In this example, a corner formed by the back surface of the core material and the end face on the bent portion side is formed.

Except for the above conditions, two types of building materials were produced in the same manner as in Comparative Example 2, and a frame material was produced using these materials. Was evaluated for the appearance of the sheet material and the presence or absence of a surplus phenomenon of the sheet material in the bent portion.

Comparative Example 4 Example 1 was repeated except that a V-groove was formed so that the margin of the core at the V-groove tip was 0.4 mm.
In the same manner as above, two types of building materials were prepared, a frame material was prepared using these materials, the state of the obtained frame material was observed, and the appearance of the bent portion, the presence or absence of a surplus phenomenon of the sheet material in the bent portion. Was evaluated, and the results are shown in Table 1.

[0025]

[Table 1]

From the results shown in Table 1, in the embodiment of the present invention, V
A building material capable of forming a bent portion by bending the back surface side of a core material using a groove, wherein a whitening phenomenon and a crack are not easily generated in the bent portion, and a sheet material is hardly generated in the bent portion. Was confirmed.

[0027]

According to the construction material of the first aspect of the present invention, a flat portion having a width of 0.4 to 0.8 mm is formed at the tip of the V-groove, and the margin of the core material at the tip of the V-groove is set to 0.1 mm. 1-0.3m
m, it is a building material that can be bent to the back side of the core material using the V-groove to form a bent portion, and the bent portion is less likely to cause whitening and cracking, and the bent portion has too little sheet material. It is a building material that does not easily cause phenomena.

In the construction material according to the second aspect of the present invention, when the bent portion is formed by bending the back surface side, the substantially step-shaped contact surface formed on one core material is contacted with the other core material. Since the corner portions abut, the movement of each core material is suppressed at the abutting portions, so that in addition to the effect of the invention according to claim 1, the phenomenon of the sheet material at the bent portion is less likely to occur.

In the V-grooving blade according to the third aspect of the present invention, a flat portion having a width of 0.4 to 0.8 mm is formed at the tip thereof. Item 2
The described building material can be easily manufactured.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state before bending a building material according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the same folded state.

FIG. 3 is a partially enlarged cross-sectional view illustrating a bent portion in FIG. 2 for explaining an excessive portion of a sheet material 1;

FIG. 4 is a sectional view showing a state in which a building material according to a second embodiment of the present invention is bent.

FIG. 5 is a sectional view showing a state before bending a building material according to a third embodiment of the present invention.

FIG. 6 is a cross-sectional view showing the same folded state.

FIG. 7 is a cross-sectional view showing a state before bending a building material of a conventional example.

FIG. 8 is a cross-sectional view showing the same folded state.

FIG. 9 is a cross-sectional view showing a production example in which the angle of the V-groove in Comparative Example 3 is 45 ° and showing a bent state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet material 2, 2a, 2b Core material 3 Building material 4, 4a, 4b V groove 5, 5a, 5b Bending part 6 Flat part 7 Remaining margin 8a, 8b Corner 9 Contact surface A Too much sheet material

Claims (3)

[Claims] 1. A sheet material is stuck on the surface of a flat core material, and a V groove is formed on the back surface of the core material.
In a building material that can be bent to form a bent portion by using the groove to the back side of the core material, the tip of the V-groove is 0.4 to 0.8.
A building material, wherein a flat portion having a width of mm is formed, and a margin of a core material at a tip position of a V-groove is 0.1 to 0.3 mm. 2. One of two core members divided by a V-groove and extending outward from the bent portion when the bent portion is formed by being bent to the back surface side. A substantially step-shaped contact surface is formed on the corner formed by the back surface of the material and the end surface on the bent portion side, and the corner formed by the back surface of the other core material and the end surface on the bent portion side is formed. It is formed in a shape corresponding to the substantially step-shaped contact surface, and when the bent portion is formed, the substantially step-shaped contact surface is formed by the back surface of the other core material and the end surface on the bent portion side. The building material according to claim 1, wherein the corners formed are in contact with each other. 3. The V-grooving blade for building materials according to claim 1 or 2, wherein the tip of the V-groove is 0.4 to 0.1 mm.
V-groove processing blade forming a flat part with a width of 8 mm.