JPH01118401A - Manufacture of aggregate wood - Google Patents

Abstract

PURPOSE: To improve the yield and reduce a manufacturing cost by forming a slant from one end to the other along both the lateral parts of a raw material with a imperfect circular cross section through splitting a small dia. long starting with its center and assembling adjacent base materials to the slant to be bonded. CONSTITUTION: A log 1a is split from the center part in the longitudinal direction and a raw material 2 made up of imperfect circular members such as of a semi-circular or a quarter-circular shape in cross section, is manufactured. Next, a slant 3 is formed along a shape with a tapered inclination in the longitudinal direction of the raw material 2 and thus the base material 5 obtained is of a pyramidal shape with a chevron-shape cross section. Further, a plurality of pieces, e.g. four pieces of the base material 5 arranged adjacent to each other as a single unit are assembled together by fitting the slant on one end 6 into the slant on the other end 7 of each of these pieces and then are bonded. Consequently, it is possible to manufacture the laminated wood 8 using a small dia. wood which is a long of a small diameter.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing laminated wood, particularly a method for manufacturing laminated wood using small-diameter wood.

[Conventional technology]

Conventionally, the main members constituting laminated timber are flat plates and square plates made from sawn logs, and other members with rectangular or trapezoidal cross sections are also known. What these members have in common is that their cross-sectional shape has a parallel portion that does not change in the length direction, in other words, they have a parallel shape with a constant length.

[Problem that the invention seeks to solve]

However, in the conventional manufacturing method of laminated wood, the shape of naturally grown logs (hereinafter referred to as logs) is
Since the root is thick and becomes thinner towards the tip, if you try to obtain a parallel phase shape of a certain length, triangular cut pieces will be generated, resulting in loss, and the proportion of loss increases as the diameter becomes smaller. However, there was a problem in that the production cost was relatively high.

[Purpose of the invention]

The present invention was made to solve these problems, and an object of the present invention is to provide a method for manufacturing laminated wood that can reduce loss of raw materials and reduce production costs.

[Means for solving problems]

For this reason, in the method for manufacturing laminated wood of the present invention, a small-diameter raw wood is divided from the center to make a material consisting of at least one member having an occluded circular cross section, and then one end is divided along both sides of this material. After configuring the base material by forming a slope from one end to the other end, by combining/adhering multiple adjacent base materials using this base material as a unit,
The present invention aims to achieve the above object by providing a method for manufacturing small-diameter laminated wood with improved yield and low processing cost.

[Effect]

By the above method, by combining/bonding a plurality of adjacent base materials with the slope of one end facing the slope of the other end, a laminated lumber of small diameter wood can be manufactured with a high yield. be able to.

〔Example〕

FIG. 1 is a perspective view showing a laminated timber manufactured by a method for manufacturing laminated timber according to an embodiment of the present invention, FIG. 2 is a side view of the same, and FIG.
The figures are explanatory views of the same material, (a) is a front view of the same, (b) is a left side view of the same, (C) is a right side view of the same, and Figure 4 is an explanatory view of the same base material. ) is the same front view, (b) is the same left side view, (
C) is a right side view of the same.

In the figure, 1 is a cross section of a small-diameter log 1a, and 2 is a material consisting of a member 2a whose cross section is an occluded circle obtained by dividing the log 1a from the center along the fiber direction. A semicircular member divided into two parts is used. 3
4 is the slope formed on both sides of this material 20, and 4 is the slope formed on both sides of the material 20.
5 is a truncated pyramid-shaped base material with a slope 3 formed by cutting off the waste material part 4, 6 is a long width part that is one end of this base material 5, and 7 is the other end of the base material 5. A certain long width part 7 is a short width part which is the other end of the base material 5, and slopes 3 are formed on both sides of the material 2 along the slope from this short width part 7 to the long width part 6. This constitutes the base material 5. 8 is a square laminated timber made by combining a plurality of base materials with one end 6 thick and the other @7 thin base material 5 as a unit, and FIG. 1 shows a square laminated timber whose cross section is square. . 8a is an internal space of this square laminated timber 8.

A method for manufacturing laminated wood according to an embodiment of the present invention will be described.

First, at least one log 1a is divided from the center along the length direction, so that the cross section is, for example, a semicircle or a quarter.
A material 2 made of at least one member having an occluded shape such as a circle is made (FIGS. 1 and 2 show the case where the material is made of one member).Next, this material 2 is Slope 3 along the shape with a tapered slope in the length direction.
After configuring a pyramid-shaped base material 5 having a mountain-shaped cross section, a plurality of adjacent base materials 5, for example, four base materials 5, are connected to the slope of one end 6 and the other end. By combining and gluing the slopes of No. 7 facing each other, a laminated lumber using small-diameter wood, which is small-diameter raw wood, is manufactured.

In one embodiment of the present invention, an example is shown in which four base materials 5 are used, and they are combined and bonded together as rectangular pieces having an uneven cross section.

Adhesives for the base material 5 include resorcinol resin-based, urethane resin-based, and Uniar resin-based adhesives that cure at room temperature, but they can be used depending on the required water resistance and durability of the adhesive. This is based on the concept in accordance with the Japanese Agricultural Standards (JAS).

In addition, when bonding multiple base materials together, in order to bond the sides of each component, it is necessary to apply the above-mentioned adhesive according to the shape of the components, and then apply a special pressure clamp according to the shape of the combination. Use a tool to crimp from 2 to 4 sides.

According to an embodiment of the present invention, a raw material 2 having a cross-section with an occluded circle is created by dividing a log having a small diameter from the center, and the material 2 is then cut along the tapered slope in the length direction of the material 2. By configuring the slope 3, a base material 5 having a cross section or a mountain shape is formed, and with this base material 5 as a unit, a plurality of base materials 5 are bonded together with one end 6 and the other end 7 alternately. As a result, the amount of material in the waste material section 4 is small, the production cost is low, and a straight-grained surface of annual rings can be placed on the outer surface of the laminated wood, and surface cracks in the material can be hidden within the bonded surface. Since the materials can be combined with each other, it is possible to express a material with a relatively beautiful appearance, and it is possible to provide a method for producing laminated wood as a material for architectural furniture. Thinning is a necessary operation in the process of tree production, and since thinning is carried out in stages according to the degree of growth of the tree, the diameter of the material is not necessarily constant. However, despite the fact that 15-year-old logs, which are used as construction scaffolding logs, have the highest amount of thinning, the cost of transporting them is almost the same as that of large-diameter logs, or the cost of processing them into finished materials is higher. The market value of these trees is low, and people are reluctant to remove them, which has a considerable impact on the management of artificial forests.

According to the above-mentioned embodiment, since the portion of the material that becomes waste during sawing can be reduced, the wood can be manufactured by a method that can reduce the production cost due to more usable portions than the conventional method, thus promoting the thinning operation. It can also be expected to be useful in forest management.

[Other Examples]

In one embodiment of the present invention, the laminated timber made by combining a plurality of base materials was a square lumber, but in other embodiments of the present invention, as shown in FIGS. 5 to 8, the base materials were By assembling it into a flat plate 9 and finishing it smooth by removing the protruding parts 6a, the surface of the laminated wood can be expressed as having a texture similar to a straight grain due to annual rings. On the side closest to the tree core, there is a lot of red flesh that is both beautiful and durable, giving it an appearance similar to that of a flat material obtained from large-diameter logs.

Further, in the above-mentioned embodiment, the material is made of a single member whose cross section is an occluded circle obtained by dividing a log having a small diameter. The material 2 that has been divided into two parts as shown in FIG. After that, each side part is finished and a triangular prism-shaped base material 5 is made with a triangular cross section as shown in FIGS. 11(a) and 11(b). A laminated timber may be manufactured by assembling and bonding the square laminated timber 8, which is a square timber shown, and the flat laminated timber 9, which is a flat plate shown in FIGS. 14 and 15, respectively.

〔Effect of the invention〕

As described above, according to the present invention, a material is made of at least one member having an occluded circular cross section by dividing a small-diameter log from the center, and then the side portions of this material are By forming a slope along the log, a base material with less removed parts that become waste material is constructed, and by combining/bonding multiple base materials using this base material as a unit, radial dry cracks in the raw wood are hidden. It has the effect of providing a method for manufacturing laminated wood with good quality and low processing cost, with the inner surface facing outward.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a laminated timber manufactured by a method for manufacturing laminated timber according to an embodiment of the present invention, FIG. 2 is a side view of the same, and FIG.
The figures are explanatory diagrams of the same material, (a) is a front view of the material, (b)
) is the same left side view, (C) is the same right side view, FIG. 4 is an explanatory view of the same base material, (a) is the same front view, (b) is the same left side view,
(c) is a right side view of the same, and FIGS. 5 and 6 are explanatory views of members showing other embodiments of the present invention.
In the figure, (a) is a side view of the same long width part, (b) is a side view of the short width part, FIG. 7 is a side view showing the laminated timber of the same flat plate, FIG. Figure 9 is an explanatory diagram showing the material in which four divided members are bonded facing each other, where (a) is a front view of the same, (b) is a left side view, (C) is a right side view of the same, and Figure 10 is a front view of the same. These are explanatory views of a material in which divided members are bonded to face each other, in which (a) is a front view of the same material, (b) is a left side view of the same, (c) is a right side view of the same, and 11th
The figures are explanatory diagrams of the same base material, (a) is a side view before cutting out the waste material part, (b) is a side view after cutting out the same part, and the first
2 is a side view showing the isogonal laminated timber, FIG. 13 is a perspective view thereof, FIG. 14 is a side view showing the flat laminated timber, and FIG. 15 is a perspective view thereof. In the figure, 1a...Log 2---Materials 2a, 2b"...Member 3...Slope 5...Base material 6...・・One end 7 ・・・Other end 8 ・Square 9 ・・Flat plate In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] (1) A material consisting of at least one member having an occluded circular cross section obtained by dividing a small-diameter log from the center along its length, and then A base material is constructed by forming a slope from one end to the other, and then, using this base material as a unit, a plurality of adjacent base materials are combined/bonded with their respective slopes facing each other. Manufacturing method of laminated wood. (2) Combining multiple base materials/
2. The method for manufacturing a laminated timber according to claim 1, wherein the bonded laminated timber is a square laminated timber. (3) Claim 1, characterized in that the laminated wood obtained by combining/adhering a plurality of base materials is flat laminated wood.
2. Method for producing laminated wood as described in Section 1.