JPH079415A - Production of lumber - Google Patents

Abstract

PURPOSE:To produce lumber having effect hardly generating deformation by mutually setting off forces ready to bend. CONSTITUTION:In a first process, lumber 2 is cut at positions of 1/4, 2/4, 1/4 with respect to the thickness of the lumber to form a left lumber unit 2A, a central lumber unit 2B and a right lumber unit 2C and, in a second process, the left and right lumber units 2A, 2C are reversed centering around the central lumber unit 2B to be bonded to the left and right cut ends of the central lumber unit 2B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing lumber as a construction material, which is mainly made of pine wood.

[0002]

2. Description of the Related Art Heretofore, in this type, the following has been done. Therefore, pine wood is expected as a cheap building material. However, since it is rarely used as a building material, it is rich in resources.

[0003]

The problems described in the prior art have the following problems. Since pine wood is greatly deformed, its range of use as a building material is limited.

The present application has been made in view of the above problems of the prior art, and an object of the present application is to provide a device capable of solving the above problems.

[0005]

In order to achieve the above object, the present invention is as follows. The present invention is
It is a method of manufacturing a lumber, which includes the following steps. From the first step to the material lumber 2 cut at a position of 1/4, 2/4 of the thickness of the edge of the material lumber, left material lumber unit 2A, center Forming the material lumber unit 2B and the right material lumber unit 2C. From the second step to the center material lumber single body 2B as a center, while reversing the left material lumber single body 2A, the cut 2B3 located on the right side of the central material lumber single body 2B
Glue 2D on to
While reversing C, bond with the adhesive 2D to the cut 2B3 located on the left side of the central material lumber unit 2B.

[0006]

EXAMPLES Examples will be described with reference to the drawings. The first invention is configured as follows. No. 1 is a lumber obtained by this invention. 2 is a pine lumber (hereinafter referred to as raw lumber) because it is a raw material of the lumber 1.

The details of the manufacturing method will be described below. First step The material lumber 2 is cut at a position of 1/4, 2/4 of the thickness of the edge of the material lumber, and the left material lumber unit 2A, the center Single lumber for material 2
B, a lumber unit 2C for the right material is formed.

Reference numeral 2A1 is an upper portion of the left raw material lumber unit 2A, and 2A2 is a lower portion of the left raw material lumber unit 2A. 2A3 is a cut end. 2B1 is an upper portion of the central lumber unit 2B for material, and 2B2
Is a lower part of the central material lumber unit 2B.
2B3 is a cut end. 2C1 is an upper portion of the right raw material lumber single body 2C, and 2C2 is a lower portion of the right raw material lumber single body 2C. 2C3 is a cut end.

Second Step Referring to FIG. 2, the central lumber unit 2B for the material is centered and the left lumber unit 2A for the material is reversed, while the central lumber unit 2B is positioned on the right side. Cut 2B3
Glue 2D on to
While reversing C, it is adhered to the cut 2B3 located on the left side of the central material lumber unit 2B with the adhesive 2D.

The operation will be described together with the effect.

[0011]

Since the present invention is configured as described above, it has the following effects. This will be described with reference to FIG. As shown in the diagram on the left, when the lumber units 2A, 2B, and 2C for each raw material are adhered in the state of the first step, the bending force is generated as shown by the arrow, and the material is easily deformed. However, in the one obtained in the present invention, since it is configured as shown in the diagram on the right side, the forces trying to bend act like arrows, so that the forces trying to bend cancel each other out and deform. It will be difficult.

Further, in the right view (sawmill 1) in FIG. 6, one upward arrow, two downward arrows, two rightward arrows and one leftward arrow are shown. Considering the area, the material lumber single body 2B is twice as large as the material lumber single body 2A and the material lumber single body 2C.
The material-only lumber unit 2B has two upward arrows and two leftward arrows, which are in balance as a whole.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a cut state of a raw material lumber.

FIG. 2 is a cross-sectional view illustrating arrangement states of a left-side raw material lumber single body, a central raw material lumber single body, and a right raw material lumber single body.

FIG. 3 is a cross-sectional view illustrating a bonded state of the above.

FIG. 4 is a perspective view of a lumber obtained by the present invention.

FIG. 5 is an enlarged sectional view taken along line AA.

FIG. 6 is a cross-sectional view illustrating the effect of the lumber obtained in the present invention.

[Explanation of symbols]

 1 Lumber 2 Lumber Lumber 2A Left Lumber Lumber Single Unit 2B Center Lumber Lumber Single Unit 2A3, 2B3 Cut 2D Adhesive

Claims (1)

[Claims] 1. A method for manufacturing a lumber, which comprises the following steps. From the first step to the material lumber (2) is cut at a position of 1/4, 2/4 of the thickness of the edge of the material lumber, and the left material lumber alone ( 2A), lumber unit for the central material (2
B), forming a lumber unit (2C) for the right material.
From the second step to the center material lumber single body (2B) as a center, while inverting the left material lumber single body (2A), a cut end located on the right side of the central raw material lumber single body (2B) ( 2B3), and also while inverting the right lumber material unit (2C), it adheres to the cut (2B3) located on the left side of the central raw material material unit (2B).