JPS6317003A - Manufacture of node board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method of manufacturing a joint plate.

[Conventional technology]

Originally, in Japan, knotless wood was highly prized for its beauty and strength, regardless of tree species, and was traded at high prices as high-grade building materials and precious wood, but there were exceptions for use in warehouses, kasuri (kasuri), and gates. Boards with densely produced wood (known as knot boards) have been prized as exterior wall materials for buildings such as cypress and Japanese mackerel due to the shortage of old trees after World War II. However, in the 1960s, burlap boards were sliced (veneered, veneered or sawn into plywood, etc.). Although a number of companies have begun to produce and sell decorative pasting and wall materials, the production materials that serve as the base plates are in short supply.
With the recent westernization of architectural styles, 2X4 (two-piece)
[Four] Not only in construction methods but also in conventional construction methods, the traditional idea of using no-knot wood for interior and exterior design is changing to the idea of using tubular wood in pursuit of natural beauty, and the use of knot board wood is expected to increase even more in the future. .

[Problem that the invention seeks to solve]

As described above, even though the demand for knotted board materials is expected to increase in the future, there is a problem in that the supply of knotted board materials is already insufficient to meet the demand.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention makes holes vertically or diagonally at the quiver position or other desired position of the original board using a drilling tool such as a drill with a sharp blade, and This method is to manufacture knotted boards by closely fitting and fixing fillers shaped from branches of the original board, and then adjusting the surface of the original board as appropriate. The details will be described below.

First, the original board in the present invention is not particularly limited in terms of its wood species or dimensions, but is usually sawn from medium or large diameter wood and has a length of 2,000 to 4,000 mm and a width of 200 to 200 mm.
A plate having a size of about 500 mg and a thickness of 10 to 120 mm is used as a standard, and there is no problem with the present invention even if the length, width, and thickness are larger or smaller than these dimensions.

In addition, the root part (shinibushi) in this invention refers to the hole where the central part of the knot is missing, and other desired positions refer to the arrangement of the raw part and the root part on the board surface. In relation to this, it refers to a position where it is judged that the provision of a new knot is more aesthetically pleasing.

The diameter of the hole to be drilled vertically or diagonally in such a position using a drilling tool with a sharp blade is not particularly limited, but in normal cases, the most practical diameter is about 30 to 60 mm. A diameter suitable for the size, number, etc. of the living parts may be appropriately selected.

Furthermore, the filler wood in this invention is collected from the trunk or branch of thinned or felled timber, and is shaped into a rod with the same diameter and length as the diameter and depth of the hole drilled on the original plate, with the core of the trunk or branch as the axis. The surface is rounded and shaped so that concentric circles or growth rings similar to this appear in any cross section. Therefore, in a normal case, the diameter of the buried wood is Approximately 30-60 mm, length 10-
It is about 120 mm (slightly longer if the hole is diagonal), but
It is not limited to this. In addition, the more the original board and the filler wood are of the same tree species or similar,
In addition, the sharper the blade of the drilling tool, the higher the shaping precision of the side of the filler, and the more closely the filler is fitted, the more conspicuous the boundary line between the inserted filler and the original board will be. Apply ethylene/vinyl acetate copolymer, polyurethane resin, epoxy resin, or other woodworking adhesive to at least 10,000 of the inner surface of the hole made in the original board or the side surface of the filler, and then push or drive the filler into the hole. It goes without saying that the embedded wood will not easily fall off if it is scratched.

In this way, the original board with the filler firmly fitted into the hole drilled at the original position or other desired position,
Either use a sawmill to further grind the wood into relatively thick joint boards, or
Alternatively, it is also possible to manufacture a knotted decorative board by slicing it to make a relatively thin knotted veneer and bonding it to a substrate made of plywood, parallel laminated veneer, laminated wood, fiberboard, etc. .

〔effect〕

According to the method of the present invention described above, the conventional joint board material,
Without changing mechanical strength, durability, or other qualities, we can effectively make use of thinned wood or branches of felled trees to artificially make original boards that were poorly evaluated due to the arrangement of the original parts and living parts etc. Therefore, like conventional knotted board materials, it can be widely used not only for exterior wall materials and interior wall materials, but also for flooring or ceiling materials, and even furniture materials. The method of this invention is extremely simple and can be easily mass-produced (it can fully respond to the future increase in demand for knot boards, and is also very meaningful from the perspective of protecting resources such as thinned wood). It can be said that it is a thing.

Claims (1)

[Claims] Drill holes vertically or diagonally at dead knot positions or other desired positions on the original plate using a drilling tool such as a drill with a sharp blade, and tightly fit fillers shaped from felled tree branches into these holes. A method for producing a knotted board, which comprises suitably adjusting the surface of the original board after it has been packed and fixed.