JPH08313153A - Crack preventive drying system for timber - Google Patents

Abstract

PURPOSE: To eliminate the crack of a timber at the exterior due to shrinkage of the interior by opening a hole at the core of the timber used for a building material, and drying the timer from the interior. CONSTITUTION: A working timber 3 is mounted at a laterally moving unit 4, the nit 4 is moved to the left or right, and the half of the timber 3 is dug out by a rotating drill 2. Further, the residual half of the timber 3 moved to one side is dug out this time. The ventilation of the timer 3 is improved, and the interior of the timber 3 is dried. In the case of drying, the outer surface of the timber 3 is suppressed, it is covered with a vinyl sheet. When the drying of the timber 3 is expedited, both the ends of the timber 3 are connected by the pipe of a heat insulator, hot air is blown to expedite the drying. Thus, the interior of the timber 3 is shrunk to eliminate the crack at the exterior.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to prevent cracks occurring in columns of building materials.

[0002]

2. Description of the Related Art As a method of preventing cracks in pillars and the like, since ancient times it has been said that splitting is done by making a saw on one side of a square lumber, but this method is only possible when the cut side is in contact with a wall.

[0003]

The cause of the cracks in this material is that the drying shrinkage is not uniform between the inside and the surface part, and the drying shrinkage occurs first from the surface of the material, so that it is caused by the strain of internal and external shrinkage. is there. The present invention focuses on this point, and attempts to dry the inside first by making a hole in the core of the material.

[0004]

[Means for Solving the Problems] First, a lumber that has been lumbered is punched with a woodworking drill. Collect it in one place and collect to suppress the drying of the outside as much as possible. It is even better to cover both ends with a vinyl sheet. When the drying is required in a short time, the drying can be promoted by passing hot air as shown in FIG.

[0005]

[Operation] By opening a hole in the core of the timber to suppress the drying outside, the material begins to shrink from the inside first. This means that a phenomenon opposite to that of conventional natural drying occurs.
In other words, when the inside contracts, it cannot crack outside. The strength of the material has almost no effect because the core is hollow.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, FIG. 1 is a perspective view of a square wood punching machine. First, the timber is attached to the left and right moving body 4. Then move it left or right and hollow out half of the timber with a rotating drill. Then move it to one side and hollow out the remaining half. This is the end of the drilling work and the drying work. It is effective to cover the outer surface with a vinyl sheet to prevent drying. However, improve ventilation at both ends of the material. When the material is to be dried quickly, both ends of each material are connected by pipes made of heat-resistant material as shown in the right column of FIG. 2, and hot air is blown into the material to accelerate the drying.

[0007]

[Effects of the Invention] Japanese cypress and the like are useful as pillar materials and are expensive. However, it has a drawback that it is easily cracked due to hard wood. By adopting the system according to the present invention, the drawbacks are eliminated, and the value as a building material is increased.

[Brief description of drawings]

FIG. 1 is a perspective view of a processing machine of the present invention.

FIG. 2 is a perspective view of the drying system of the present invention.

[Explanation of symbols]

 1 is a power room 2 is a drill 3 is processed wood 4 is a left and right moving body 5 is a hot air inlet 6 is a hot air outlet

Claims (1)

[Claims] 1. A facility and a drying method for making a hole in a core of wood used for a building material or the like and drying it from the inside.