JPS6055281B2 - Method for manufacturing wood pillars - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing columnar materials using wood-based materials suitable for use in furniture, daily necessities, fittings, and other construction materials.

Conventionally, columnar materials used for furniture, daily necessities, construction materials, etc. have been formed by cutting the surface of a single piece of wood. However, this conventional columnar material cracks and
It tends to twist, warp, etc. and lacks dimensional stability, which in turn has a negative effect on furniture, daily necessities, etc. made using it. Furthermore, with this conventional method, the cutting process is time-consuming, and if a hollow columnar material is to be manufactured, a large amount of the saw layer will be removed during the cutting process to form the hollow part, which is a resource-intensive process. However, it is extremely wasteful and increases manufacturing costs.

Moreover, despite the recent demand for natural precious woods, resource constraints have made it extremely difficult and expensive to obtain the desired wood. However, in the method of manufacturing a columnar material by cutting as described above, it is difficult to obtain the desired columnar material, and if high-quality materials are used for manufacturing, the manufacturing cost becomes high. In addition, as proposed by the present applicant (Japanese Patent Application Laid-Open No. 52-118821), the convex curved side of a curved plate material that is curved to close the groove openings of a plurality of narrow grooves opened in parallel on one surface is flexible. There is also a column that uses a circular plate with a non-stretchable sheet pasted on the sheet and concave curved side, but if you want to use this to form a concave part with an arcuate cross section, you will need to open the groove opening. There is also a problem in terms of strength, and since it uses a flexible sheet that has different properties from original wood, there is a problem in using it in exactly the same way as wood. In consideration of the above circumstances, the present invention has a luxurious appearance, a wide variety of shapes, allows you to easily obtain what you want, and even when using high-quality natural wood, it can be used without wasting it, preventing cracks and twisting. It is an object of the present invention to provide a method for manufacturing a columnar material, which can produce a large quantity of columnar material at low cost, which is resistant to warping, has good dimensional stability, and is durable. Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows a part of a wooden columnar material 1 manufactured by the manufacturing method according to the present invention. 3, and are butted and bonded to the plate material 2b, which is a flat plate material.

FIG. 2 shows another example different from the columnar material shown in FIG. . . , and is bonded and bonded to a flat plate material 2b'' which has a substantially L-shaped cross section and is bonded to the plate.

Next, a method for producing these wooden columnar materials will be explained.

As shown in Figure 3, cedar, cypress, zelkova, paulownia, teak,
A plate material 2 is prepared by laminating and adhering a high-quality material such as rosewood, ebony, or rosewood as a surface material 4 on the surface of a plywood base plate 5. The thickness of the surface material 4 of the plate material 2 is such that even when cutting and polishing is performed to prepare the surface of the surface material 4 as described later, the thickness of the base plate 5 is the same as the outer surface of the completed wooden columnar material 1. The thickness may be such that it is not exposed, for example, about the thickness of about 2 degrees. First, the length of the prepared board 2 corresponds to the length of the target wooden column 1 and the width corresponds to the outer circumference of the wooden column 1, and then as shown in FIG. 3,
A plurality of highly flexible sheets 7a, 7b such as paper tape or cloth tape are pasted in the longitudinal direction on both sides of the plate material 2, corresponding to the notch grooves 6a, 6b having a V-shaped cross section that will be formed later. wear it. Note that the flexible sheets 7a and 7b may not be attached as shown in FIG. 3, but may be attached to the entire surface of the plate material 2, and the method of attachment is not limited to the above example. Thereafter, cut grooves 6a having a V-shaped cross section are cut at predetermined intervals from the other surface of the plate material 2 to which the flexible sheet 7a is attached using a mechanical tool such as a saw or a cutter, as shown in FIGS. 4 and 5. A belt-like plate material 2a is formed which is parallel to the length direction and has a substantially trapezoidal cross section forming a concave portion 3 having an arcuate cross section. 4
As shown in FIG. 5 and FIG. 5, a plurality of notch grooves 6b each having a V-shaped cross section and having an angle larger than the angle θ formed by the groove walls of the notch groove 7a are opened in parallel in the longitudinal direction at predetermined intervals, and the grooves have an arcuate cross-section. It is divided into a plate material 2a forming a recess 3 and a flat plate material 2b.

Note that the depth of the notch grooves 6a and 6b, which have a square cross section, is the same as that of the flexible sheets 7a and 7 attached to the surface of the plate material 2.
The optimum depth is to reach the back surface of the flexible sheets 7a and 7b, but not to damage the flexible sheets 7a and 7b. Moreover, the notch groove 6a (
7) The angle θ formed by the groove wall should be appropriately determined depending on the curvature of the recess 3 having an arcuate cross section of the target wooden columnar material 1. However, since the notch groove 6a is formed using a mechanical tool such as a saw, the relationship therewith should be taken into consideration. Therefore, considering the degree of damage to the cutting edge of the cutting tool that cuts the notched groove 6a and the digging speed, it is appropriate that the angle 0 formed by the groove wall of the notched groove 6a is about 9 to 15 cuts. Of course, angles other than the above may be used, but if the angle is smaller than 9 degrees, the cutting edge of the cutter is likely to break. Next, as shown in FIGS. 6 and 7, the plate material 2 is sequentially bent by bending the flexible sheet 7a so as to close the notch groove 6a, and the notch groove 6a (7) The groove walls are tightly joined and bonded to each other via an adhesive to form a recess 3 having an arcuate cross section, and the plate material 2 is bent using the flexible sheet 7b as a guide to close the notched groove 6b. , the notched grooves 6b are closed and continuous using adhesive or the like, and then the flat plate material 2 is formed.
B Butt and glue to form a columnar body.

After that, the flexible sheets 7a and 7b may be removed from the outer surface of the plate material 2. However, if this continues, an uneven surface will be formed at the notched groove 6a portion, and the outer surface of the finished wooden columnar material 1 will be unsightly.In this embodiment, the columnar Cutting on the outer surface of the body,
Perform polishing. As described above, the wooden columnar material 1 as shown in FIG. 1 is completed, but the wooden columnar material 1 has almost no visible cuts on its circumferential surface, and a hollow portion 8 exists inside it.

Wooden columnar material 1'' shown in FIG. 2 is manufactured in the same manner.

That is, as shown in FIG. 8, the flexible sheet 7a''
, 7b'' is attached to the plate material 2'', a cutout groove 6 with a V-shaped cross section is formed.
a'' are parallel to each other to form a concave portion 3'' having an arcuate cross section, forming a strip-shaped plate material 2a'' with a substantially trapezoidal cross section, and a cross section in which the angle formed by the groove wall is larger than that of the notched groove 6a'' from the other surface. ■-shaped notch grooves 6b'' are opened in parallel to divide the flat plate material 2b'' into notch grooves 6a'', 6b'' in the same manner as in the above example.
are closed to form a columnar body.

The shape of one notch groove 6b'' shall be changed as appropriate depending on the shape of the flat plate material 2b''. Note that the plate material 2 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, for example, wood boards, various types of plywood, particle boards, fiberboards, etc. can be used, and as shown in FIG. By gluing the side end surfaces of ..., it may be made continuous to both sides, and this may be used as the plate material 2. In the above embodiment, the wooden columnar material 1
is hollow and can be used as is; however, if greater strength is required, reinforcing material 9, shaped to correspond to the hollow portion 8, as shown in FIGS. 10 and 11, may be used. 9" may be fitted.

As is clear from the above, according to the present invention, plate materials glued at an angle form a recess with an arcuate cross section, and are bonded against a flat plate material, with almost no breaks visible in the recess. , it is possible to obtain a wooden columnar material that looks like it was made from a single tree.

In addition, the board material used can be an inexpensive base plate with a high-quality material pasted as a surface material, plywood, etc., so it is possible to obtain a product that has a high-class feel at a low price, and is free from cracking. It is durable without twisting or warping, and since it can be made of any material, it is easy to obtain a columnar material that matches other materials. In addition, a flexible sheet is pasted on the surface of the plate material, and notch grooves are opened in parallel, and the plate material is bent using the flexible sheet as a guide so as to close the notch grooves, and the notch grooves are closed to form a columnar shape. Because it forms a body, there is no fear that the plates will come apart during manufacturing, making the manufacturing process much more efficient and simple.Furthermore, the flexible sheet can be made using commercially available paper tape or cloth tape. Yes, it is extremely convenient.

In addition, by appropriately changing the angle formed by the groove walls of the notched groove or the number thereof, the number and shape of the recesses having an arcuate cross section can be changed, and wood columnar materials of various shapes can be obtained. . In addition, the hollow wooden columnar material can be formed extremely easily, and there is no need for excavation processing to form the hollow portion, so that it is possible to save resources.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a portion of a wooden column manufactured by the manufacturing method according to the present invention, FIG. 2 is a perspective view of a portion of a modified example thereof, FIGS. 3, 4, 6, and Fig. 7 is an explanatory diagram showing the manufacturing process of the wooden columnar material, Fig. 5 is an enlarged cross-sectional view of section A in Fig. 4, and Fig. 8 is the plate material before the wooden columnar material shown in Fig. 2 is formed. A partial sectional view, FIG. 9 is a diagram showing an example of a plate material, and FIGS. 10 and 11 are diagrams showing an example of fitting a reinforcing material into a hollow part of a wooden columnar material. 1... Wooden columnar material, 2a, 2a''...
Plate material forming the recess, 2b, 2b''... flat plate material, 3, 3''... recess with arc-shaped cross section, 4.
... Surface material, 5 ... Base plate, 6a, 6b,
6a'', 6b''...Notch groove with v-shaped cross section, 7a
, 7b, 7a'', 7b''...Flexible sheet, 8
・・・・・・Hollow part.

Claims (1)

[Claims] 1 (a) A step of attaching a flexible sheet to one side of a plate material of an appropriate width, and (b) A step of attaching a flexible sheet to the flexible sheet in the length direction from the other surface of the plate material. Then, cut out grooves with a V-shaped cross section at appropriate intervals to form appropriate groove walls that reach the flexible sheet but do not damage it. a step of forming a plate material having a substantially trapezoidal shape and forming a belt-shaped recess; and (c) a step of further adhering a flexible sheet to the surface of the plate material opposite to the surface to which the flexible sheet is pasted. and (d) from the surface opposite to the surface to which the latter flexible sheet was pasted in step (c), toward the latter flexible sheet. Cut grooves with a V-shaped cross section at appropriate intervals to form an appropriate groove wall without damaging the grooves, and divide the plate material by the grooves to form a band-shaped recess with a substantially trapezoidal cross section. (e) bending the flexible sheet so as to close the notch groove, and joining the plate materials at an angle to close the notch groove and form a recess; A process of bonding and bonding to form a recess with an arc-shaped cross section, and also continuously bonding and bonding flat plate materials;
f) a step of removing the flexible sheet after each board is adhered. 2. (a) attaching a flexible sheet to one side of a board with an appropriate width, and (b) attaching a flexible sheet to the flexible sheet from the other surface of the board in the length direction. Cut grooves with a V-shaped cross section at appropriate intervals to form appropriate groove walls that reach the sheet but do not damage it, partition the plate material with the notch grooves, and create belt-shaped recesses with approximately trapezoidal cross sections. (c) further adhering a flexible sheet to the surface of the plate material opposite to the surface to which the flexible sheet is adhered; (d) From the side opposite to the side to which the latter flexible sheet was attached in step (c), reach the latter flexible sheet but damage it. A plate material and a flat plate material in which notched grooves with a V-shaped cross section are cut at appropriate intervals to form an appropriate groove wall with a notch, and the plate material is partitioned by the notched grooves to form a band-shaped recess with a substantially trapezoidal cross section. (e) bending the flexible sheet so as to close the notched groove, and joining and gluing the plate materials at an angle to close the notched groove and form a concave portion to form a circular cross section; The process of forming an arc-shaped recess and also continuously joining and gluing flat plate materials; (
f) a step of removing the flexible sheet after each plate material is bonded; and (g) a step of cutting and polishing the surface of the plate material from which the flexible sheet has been removed. Method for manufacturing columnar materials.