JP3364371B2 - Building materials - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building member which can be used for various purposes such as a fitting member, a furniture member or a construction material.

[0002]

2. Description of the Related Art Conventionally, construction members have been provided in which a veneer, a synthetic resin sheet, a decorative sheet such as a decorative paper are attached to the surface of a base material processed into various shapes. Among them, the veneer is attached. Has an excellent wood texture and is very close to the one processed from solid wood. However, the sliced veneer is easily cracked when the water content decreases, and the cost increases when the thickness is large.Thus, the sliced sliced veneer is used as thinly as possible. Will be things.

[0003]

When a plywood is used as a base material for such a construction member, shrinkage and expansion caused by a change in water content are caused between the veneer and the surface veneer of the plywood to which the veneer is attached. Since the amounts are different, there is a problem that the veneer plate on the surface is cracked or cracked over a long period of time. Further, as shown in FIGS. 1 and 2, when the projecting plate 2 is pasted from the surface A to the side face B of the base material 1, the plywood is bonded so that the fiber directions of the veneer are orthogonal to each other. The veneers of the veneer exposed on the side surface B of the plywood base material 1 are such that the fiber directions of the veneer are perpendicular to the side surface of the base material every other sheet, and the veneer surfaces of the veneers 1b and 1d whose fiber directions are orthogonal to each other are It is difficult to finish the surface smoothly, and irregularities are likely to occur on the side surface B of the base material, and even after the veneer 2 is attached, the irregularities appear on the surface of the veneer.
Also, when the veneer 2 is attached to the side surface B of the base material in which the fiber directions of the veneer are alternately orthogonal, the amount of shrinkage and expansion due to the change in the water content at the mouth surface of each veneer is different, and the veneer attached to the surface is different. 2 has a problem that cracks or cracks occur.

Further, in the single plates 1a, 1c and 1e parallel to the side surface B of the base material and the single plates 1b and 1d in which the fiber directions of the single plate are orthogonal to each other, the permeation speed of the adhesive is different and the single plate 1 orthogonal to the side surface B is
Since the penetration speed of the adhesive of b and 1d is faster, when the veneer 2 is adhered by applying a certain amount of the adhesive, the adhesive in the veneer of the veneers 1b and 1d orthogonal to the side surface B is within the veneer. And the adhesive strength sufficient to bond the veneer 2 cannot be obtained, and the unevenness of the adhesive force causes the veneer 2 to peel off on the side surface B of the base material, or the veneer 2 is cracked or cracked. There is a problem such as doing. The present invention intends to solve the problem of the veneer 2 as described above.

[0005]

DISCLOSURE OF THE INVENTION In view of the above problems, the present invention has a construction member in which a veneer sheet is attached so as to cover the side surface from the surface of a substrate, and the veneer sheet is cracked or cracked. The present invention has been achieved as a result of repeated intensive research to provide a building member that does not have such a structure. That is, according to the present invention, the veneer sheet 2 is formed so as to cover at least the surface to the side surface of the base material having the same cross-sectional shape continuous in the longitudinal direction.
In the building member to which is adhered, a wooden fiber board is used as the base material 1, and the veneer sheet 2 is adhered so that the fiber direction thereof is parallel to the longitudinal direction of the base material 4. It is a building material.

The building member of the present invention does not have a specific fiber direction as a base material, and uses a wood fiber board that is homogeneous in all parts, and the fiber direction of the veneer sheet is parallel to the longitudinal direction of the base material. Since the veneer sheet 2 is attached as described above, the veneer sheet 2 is not cracked or cracked in the portions of the front surface A and the side surface B of the building member to which the veneer sheet 2 is attached.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 4 shows an example of a perspective view of a building member according to the present invention, which is a base material 1 made of wood fiberboard.
One veneer sheet 2 is attached to the front surface A and the side surface B of the above. The substrate 1 shown in FIG. 4 has a rectangular cross-sectional shape continuous in the longitudinal direction. Also, FIG.
Although not shown in FIG. 1, the veneer sheet 2 is attached so that the fiber direction is parallel to the longitudinal direction of the building member.

The wood fiberboard used as the substrate 1 of the present invention is usually softwood such as pine, cedar or cypress, or hardwood such as rawan, capol, chestnut or poplar, or wood chips obtained by cutting waste wood. Examples thereof include medium density fiberboard and hard fiberboard obtained by pressing and molding wood fibers obtained by defibrating by a method. Among them, a wood fiber board having an average specific gravity of 0.35 to 0.95 is preferable. Such a wood fiber board alone has an excellent dimensional change rate per 1% water content of 0.03 to 0.04% in the longitudinal direction and the lateral direction, and has excellent surface smoothness. It is a thing.

Furthermore, even if the substrate is cut in a direction orthogonal to the longitudinal direction, parallel direction, or diagonal direction, the exposed surface is a homogenous surface without having a fiber direction, and therefore a protruding plate is formed on the surface. The veneer sheet will not be cracked or cracked even if it is attached. As shown in FIG. 5, even in the case where the groove C is formed on the surface of the base material, the corners of the surface and the side surface are further processed into the R surface by cutting, and the sliced veneer sheet 2 is attached to these cut surfaces. Since the surface of the plate and the cut surface are excellent in smoothness, an excellent finish can be obtained even if the veneer sheet 2 is directly adhered onto the surface.

On the other hand, FIG. 3 shows the case where a plywood having the same shape is used as a substrate. In the portion where the groove C is formed on the surface, the bottom of the groove C exposes the second veneer 1b from the surface, and the fiber direction is orthogonal to the veneer 1a forming the surface of the base material. In this way, one veneer sheet 2 is attached to the surface of the veneer having different fiber directions, the directions of contraction and expansion between the veneers are different, and the veneer is likely to be cracked. Will end up.

Further, in the portion D in which the corner portion between the surface A and the side surface B is chamfered, the exposed area of the single plate 1b whose fiber direction is perpendicular to the R surface becomes large depending on the chamfering size and angle. , R surface becomes difficult to form smoothly, and further, the contraction and expansion of each veneer has a great influence on the veneer sheet, and the veneer sheet is easily cracked.

As the veneer sheet 2 attached to the base material, a veneer obtained by cutting wood and a veneer with a backing sheet attached to the back surface of the veneer can be used. A veneer having a thickness of 0.25 mm or less is used.
If the thickness of the projecting plate is more than this range, it is not preferable because it is easily cracked when curved along with the corners and the entering corners in the groove.

As the backing sheet, a non-woven fabric,
Paper, a synthetic resin sheet, or a resin-impregnated sheet obtained by impregnating a nonwoven fabric and paper with a synthetic resin can be used. In this way, the veneer sheet 2 with the backing sheet attached thereto
It is possible to prevent the veneer from easily cracking during storage and handling before use.

Further, even when a large-sized base material is used, a plurality of veneer plates are adhered side by side on the backing sheet in a direction orthogonal to the fiber direction of the veneer plate. When using these as the veneer sheet 2,
By using a continuous veneer plate with finger joints in the fiber direction, it is possible to obtain a building member corresponding to a base material of any size. The building member of the present invention can be used for all purposes such as construction materials, frame materials, fitting members, furniture members, stair members or structural members.

[0015]

EFFECTS OF THE INVENTION The building member of the present invention uses a wood fiberboard which does not have a specific fiber direction and is homogeneous in all parts as a base material having the same cross-sectional shape continuous in the longitudinal direction. Since the fiber direction of 2 is attached so that the fiber direction is parallel to the longitudinal direction of the base material, cracks and cracks are generated in the veneer sheet 2 at the portions where the veneer sheet 2 is adhered on the front surface and the side surface of the building member. There is no such thing. Further, even when the groove C is cut on the surface or the side surface of the base material or when the cutting processing such as chamfering is performed, the surface D ejected by the cutting processing is uniform and has no fiber direction like the surface of the base material. Since it is a surface, the veneer sheet 2 attached to the surface does not crack or crack.

[Brief description of drawings]

FIG. 1 shows a conventional plywood substrate 1.

FIG. 2 is a perspective view when a veneer sheet 2 is attached to the surface of a base material 1 of a conventional plywood;

FIG. 3 shows a groove C on the surface A of the conventional building material of FIG.
Perspective view of chamfering from surface A to side B,

FIG. 4 is a perspective view of the building material of the present invention in which the base material 1 is a wood fiber board,

5] In the building material of FIG. 4, a groove C and a surface A are provided on the surface A.
Perspective view when chamfering from side to side B,

[Explanation of symbols]

1: Base material, 1a, 1c, 1e: Single plate whose fiber direction is parallel to the base material side surface B, 1b, 1d: Single plate whose fiber direction is orthogonal to the base material side surface B, 2: Veneer sheet, A: Surface, B: Side,
C: Line groove, D: R chamfered part.

Claims (2)

(57) [Claims] 1. A construction member in which a veneer sheet is adhered so as to cover at least a surface to a side surface of a base material having the same cross-sectional shape continuous in the longitudinal direction, and a wood fiber board is used as the base material. A building member, wherein the sheet is adhered so that the fiber direction of the sheet is parallel to the longitudinal direction of the base material. 2. A base material having the same cross-sectional shape continuous in the longitudinal direction, after a groove is formed on a surface or a side surface, and a veneer sheet is attached so as to cover at least the side surface and the inside of the groove. The building member according to claim 1, wherein