JPS6156371B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a columnar material using a wood-based material such as natural wood, which is suitable for use mainly as a construction material such as a column.

Recently, despite the demand for precious natural wood, resources have been limited, and large diameter natural wood is no longer easily available, making it extremely difficult and expensive to obtain what you want. ing.

In addition, in the case of pillar materials that are made from natural wood logs, etc., the characteristic defects of wood such as cracks and warping are likely to occur, which can be a serious defect in buildings using such materials.

Taking the above circumstances into consideration, the present invention has an appearance that is no different from, or even more beautiful than, a columnar material made by cutting a piece of natural wood, and eliminates the unique defects of wood, making it less likely to crack or crack. It is hard to twist, has strength and durability, can be easily obtained as desired, and when using high-quality natural wood, can be used without waste, is easy to manufacture, has low manufacturing costs, and can be produced in large quantities. The purpose is to provide a method for manufacturing columnar materials that can be produced.

Hereinafter, the present invention will be explained according to embodiments shown in the drawings.

FIG. 1 is a perspective view of a columnar material manufactured by a manufacturing method according to an embodiment of the present invention, which will be described later, and FIG. 2 is an enlarged sectional view of a portion thereof.

The columnar materials are arranged in units as shown in FIG. 2 and FIG. One joining edge 2 of the material 1 is formed into a concave arc surface with an arc shape in cross section, and the other joining edge 3 is also formed into a convex arc surface with an arc shape in cross section, and the plurality of unit materials 1 are At the joining edges 2 and 3, the concave arc surface and the convex arc surface are brought into close contact with each other at an angle and bonded together to form a hollow columnar shape having a substantially circular cross section.
7 is a hollow part.

FIG. 4 is a perspective view of a modification of the embodiment,
The columnar material has one unit material 1 as shown in FIG.
one unit member 1a so that the joint edge 3a of unit member a brings the joint edge 2a of the other unit member 1b into close contact with each other.
The joint edges 3a of the unit members 1b are formed into a convex arc surface with an arc shape in cross section, and when the joint edges 2a of the adjacent unit members 1b are formed into a columnar shape as shown in FIG. The former unit material 1a and the latter unit material 1b are alternately butted and bonded together so that the joining edge 3a of the latter unit material 1b and the joining edge 2a of the latter unit material 1b are brought into close contact with each other to form a hollow cross section. It is formed into a circular column shape. 7 is a hollow part.

Next, a method for manufacturing the columnar material will be explained.

First, prepare a plurality of materials such as wood that have approximately the same width, length, and thickness, and in order to form the unit material 1, one edge of the materials is made into a concave arc surface with an arc-shaped cross section, and one joint end is The edge 2 is formed, and the other edge is made into a convex arc surface with an arcuate cross section, and the other joint edge 3 is formed to form a plurality of unit members 1 having the same cross-sectional shape as shown in FIG. Shape.

Next, as shown in FIG. 6, a predetermined number of unit materials 1 are arranged adjacently in a horizontal row so that the joint edges 3 of the convex arc surfaces and the joint edges 2 of the concave arc surfaces of the unit materials 1 are adjacent to each other. The arrangement of each unit material 1 is fixed by pasting a plurality of flexible sheets 4 such as paper tape or cloth tape in the width direction on one surface of the continuous unit materials 1.
In addition to being attached as described above, the flexible sheet 4 may be attached to the entire surface of the continuous unit member 1 or along the joining edges 2 and 3 in the length direction.

Thereafter, the unit members 1 are sequentially bent using the flexible sheet 4 as a guide, and the unit members 1, 1 are butted and bonded together at an angle so that the joining edges 2, 3 are brought into close contact with each other. At this time, since the joining edges 2 and 3 have an arcuate cross-section, it is possible to slide them little by little so that the optimal shape is columnar, and it is only necessary to slide them so that the optimal shape is achieved before bonding. .

After the unit materials 1... are bonded together, if the flexible sheet 4 is removed from the outer surface of the unit materials 1,
A hollow columnar body is completed. In this embodiment, in order to make the joint between the joining edges 2 and 3 of the unit material 1 beautiful, the outer surface of the columnar body is cut and polished, and at that time, the flexible sheet 4 is also Remove at the same time.

The embodiment shown in FIG. 4 may also be manufactured in the same manner as described above.

Note that the unit material 1 is not limited to the above example, and may be made of any material as long as it can be processed as described above. In addition to the above examples, various types of plywood, laminated wood, etc. can be used, and as shown in FIG.
A surface material 6 such as a beautiful and high-quality natural wood veneer may be laminated and bonded on the surface of the columnar material, so that the surface material 6 appears on the outer surface of the completed columnar material.

In the above examples, the completed columnar material is hollow, but if higher strength is required,
As shown in FIG. 8, a core material 8 corresponding to the shape of the hollow part 7 may be fitted into the hollow part 7.

Although the columnar material according to the present invention can be used as a material for furniture and daily necessities, it is mainly suitable for use as a building material such as a pillar, particularly as a large diameter, luxurious and beautiful pillar.

As is clear from the above, the joint edges of the unit materials are made into concave arc surfaces or convex arc surfaces with an arc-shaped cross section so that the joint edges of the unit materials are in close contact with each other. It is characterized in that the concave arc surface and the convex arc surface of the joint edge are brought into close contact with each other at an angle and bonded together to form a columnar shape, thereby eliminating the peculiar defects of wood. It is hard to warp, crack, twist, etc., has many adhesive surfaces between unit materials, has strength and durability, and has a beautiful appearance such as sawn board and small square lumber as unit materials. It is possible to manufacture large-diameter pillar materials from thin wood, etc. regardless of the material.
Moreover, even if the appearance is to be similar to higher-grade natural wood, high-grade natural wood can be laminated and bonded as a surface material on an inexpensive base plate, making it possible to keep finishing costs low. can. In addition, large-diameter natural wood tends to be insufficiently dried and cracks may occur, but thin unit materials can evenly dry each part, preventing cracks and distortion that are common with natural wood. Misalignment is less likely to occur. Furthermore, by pretreating the unit material with a chemical solution before forming it into a columnar shape, each part of the unit material can be provided with sufficient antiseptic properties, insect repellency, or fire retardancy.

Then, a predetermined number of unit materials are arranged adjacent to each other in a horizontal row, a flexible sheet is pasted on one surface of the continuous unit materials to fix the arrangement of each unit material, and the flexible sheet is guided. Since the unit materials are bonded and bonded together, there is no fear that the unit materials will come apart during the manufacturing process, making the manufacturing process significantly easier and more efficient.Moreover, commercially available paper tape can be attached to the flexible sheet. It is extremely convenient because it can be used with cloth tape, etc. In addition, the joining edges of each unit material are not formed in a finger shape, but are formed in an arc shape in cross section, so in the process of manufacturing a column, it is made little by little so that the column has the optimal shape. You can also slightly shift the position of each unit material by sliding it.
In the process of solidifying the adhesive, when tightening the outer surface of the columnar material, etc., it is possible to correct the columnar material so that it has an optimal shape.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a columnar material manufactured by a manufacturing method according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of a portion thereof, and FIG. 3 is a perspective view of a portion of a unit material.
Fig. 4 is a perspective view of another columnar material, Fig. 5 is an enlarged sectional view of the columnar material shown in Fig. 4, Fig. 6 is a diagram showing the manufacturing method, and Fig. 7 is an example of the material used for the unit material. The figure shown in FIG. 8 is a side view of a modified example of the columnar material. 1, 1a, 1b... unit material, 2, 2a... joint edge of convex arc surface, 3, 3a... joint edge of concave arc surface,
4... Flexible sheet, 5... Base plate, 6... Surface material, 7... Hollow part, 8... Core material.

Claims (1)

[Claims] 1. A process of forming a concave arc surface or a convex arc surface on the edge of the material to form a unit material with an arc-shaped joint edge in cross section, and a unit material with a concave arc surface at the joint edge. A process of arranging unit materials adjacent to each other in a horizontal row so that the convex arc surface unit materials are adjacent to each other, and pasting a flexible sheet such as paper tape or cloth tape on one surface of the continuous unit materials. The step of fixing the arrangement of each unit material by attaching it to the unit material, and sequentially bending the unit material using the flexible sheet as a guide so that the concave arc surface and the convex arc surface, which are the joint edges of the unit material, are in close contact with each other. 1. A method for manufacturing a columnar material, comprising the steps of butt-bonding the unit materials together at an angle, and removing the flexible sheet after the unit materials have been bonded. 2. The method for manufacturing a columnar material according to claim 1, wherein one joint edge of the unit material is a concave arc surface, and the other joint edge is a convex arc surface. 3. The method of manufacturing a columnar material according to claim 1, wherein the joining edge of one unit material is a concave arc surface, and when formed into a columnar shape, the joining edge of an adjacent unit material is a convex arc surface. 4. Claim 1 in which the unit material is made of wood
A method for producing a columnar material according to item 2, item 2, or item 3. 5. The method for manufacturing a columnar material according to claim 1, 2, or 3, wherein the unit material is a base plate with a surface material laminated thereon.