JPS5811106A - Manufacture of bomboo material of which wood is combined - 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 The present invention relates to a method for manufacturing bamboo material combined with wood.

Bamboo has a smooth, vertical surface with a single color and a glossy finish.

Due to its natural beauty, artificial squares have traditionally been used for decorative purposes in buildings, such as floor pillars and floor stiles, and shafts and split bamboo Ajiro weave have been traditionally used for the ceilings of tea rooms, and recently plywood has been used for decoration. It is also used for flooring and wall coverings.

However, bamboo is the building material for Japanese-style houses, such as pillars.

The number of cases in which wood is used for stile is much smaller than that of wood. Even if bamboo wood has been used for several years, wood J
The material is easily deformed due to changes in humidity and temperature, often causing cracking, and cannot be used even if a single nail is hammered in because it has a split property or a hollow part. This is because it has drawbacks such as being easily susceptible to insects and mold.

This invention was made in order to eliminate the above-mentioned drawbacks that make bamboo material difficult to use as a building material.By combining wood, bamboo material can be used to make use of its natural beauty to create pillars, staves, etc. The purpose is to provide a manufacturing method that can be used as a building material. That is,
The felled bamboo is split at the back and joints are removed at the same time, dried naturally for about a year, and then treated with insect repellent.Then, both sides of the split back are cut out and spread into grooves, and the hollow part of the bamboo is cut out. In addition to inserting wood as a core material,
After performing a treatment to restrain the foam of the core material, a foamable synthetic resin material is injected into the gap between the core material and the hollow part of the bamboo material, and the resin material is foamed and hardened to form a bond between the bamboo material and the core material. Which gap space should I fill?

The present invention relates to a method for manufacturing bamboo material combined with wood, characterized in that both the bamboo material and the core material are bonded and fixed via the resin member.

Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of the end face of, for example, a floor pillar manufactured by the method according to the present invention. (1) in the figure is the rod part of Madake.

(2) is the square material r (core material) combined with it, (3
) is a foamed synthetic resin part filled in the gap between the rod part (1) and the core material (2) and cured. The manufacturing steps of this manufacturing method will be explained step by step using this floor pillar as an example.

(5) Cutting down - Longhorn beetles on the cut bamboo.

In order to prevent bark beetles from becoming parasitic and causing feeding damage to their larvae and adults, we remove the spawning season of these pests from spring to summer and place them in good condition around October to November. The height is about 15m, the thickness is 100m~
Select a Madake mushroom about 120 mm in length, cut it down, cut off the top and bottom, and cut the pieces of even thickness to about 3 meters in length.

(B) Splitting the spine and removing the knots... Select the back side of the bamboo material so that the bare 9-section fruit part is exposed to the front.

Split the back along the axis using a cone-shaped back-splitting knife, and remove the knots at the same time.

(C) Drying: If mold forms on the surface of bamboo material, the quality will deteriorate significantly, so this must be prevented. Generally, the conditions that prevent mold from forming are to reduce the moisture content of bamboo material to 15% or less and to maintain an atmosphere with humidity of 60% or less. Therefore, split the back 11
Bamboo material with one knot cut out is kept at a humidity of 60% without direct sunlight.
Store it in the following location.

Natural drying is carried out at least once a year until around August of the year following felling, and the moisture content is preferably reduced to 11%.

During this time, as it dries, the bamboo material undergoes natural deformation, allowing the spine to expand freely.

■) Insect repellent treatment: Bamboo wood that has been thoroughly dried as described above is either fumigated with BHC (smoke agent, etc.) or immersed in an insect repellent solution (for example, Polyden 3C).In the case of the latter method, Furthermore, the natural drying described in (C) is performed for at least one month.

(G) Inserting and fixing the core material...Cut both sides of the back split part of the naturally expanded bamboo material (1) over the entire length using a mobile cutter, etc.--Cut the square wood core material. Machining the groove (4) into which (2) will be inserted. Appropriate width B is approximately 100 the outer diameter of the bamboo material (1), and the thickness is 12
For bamboo material (1) with a diameter of 0 mm, it is set as 5 Q mm. A well-dried square piece of wood (2) of the same thickness as the groove width B (preferably a parquet square piece that is hard to deform and has been treated with insect repellent) is placed in the groove (
4) over the entire length, and then insert this core material (2) and bamboo material (
In order to restrain the deviation from 1), lightly tie the bamboo material (1) with ropes at equal intervals.

Next, a plug is attached to one end of the bamboo material (1), and the core material (2) is
Hold the entire body almost horizontally so that the top is at the top, and inject a two-component mixture of foamable synthetic resin material, such as Soflan SSA and B manufactured by Toyo Rubber Co., Ltd., from the open port at the other end through the pipe and seal the plug. Immediately inject sequentially from the side to the open side. The resin material foams immediately after injection and has a volume of approximately 20
It expands to twice its original size, and a portion bulges out from the opening end, and a small amount bulges outward from between the core material (2) and the groove (4) of the bamboo material (1), and is completely completed within 1 to 3 minutes after injection. hardens to. This filled and hardened foamed synthetic resin member (3) is the core material (2).
), but its adhesion to the inner wall of the bamboo material (1) is inferior to that of the core material (2). However, the resin member (
3) engages with some protrusions left inside the bamboo material (1) at each node, thereby creating no mechanical connection.As a result, the bamboo material (1) and the core material (2) are combined as a whole. and are firmly combined via the resin member (3). It is also possible to directly drive a nail into the cured resin member (3).

For the bamboo material (1), instead of the Madake mushroom described above, a bamboo mushroom of similar thickness and length is used, and the floor pillars can be manufactured in the same manner by the steps (A) to (G) described above.

In addition, when selecting Mosoudake for bamboo material, please refer to (5) above.
) Prior to felling, branches were removed from October to November, and about -
If you leave it for a year, sesame-like spots will naturally appear on the surface of the standing leaves, giving rise to sesame mushrooms.

This can be made into bamboo material by combining wood according to the above-mentioned process, and can be made into unique and elegant floor pillars, floor stiles, etc.

Furthermore, it is also possible to increase the decorativeness by carving away a part of the surface of the bamboo material produced in this way with a brainer to create an island, then applying a paper finish to the surface and adding a pattern with lacquer. , these processes are not directly related to this invention, so their explanation will be omitted.

FIG. 2 is an external view of the end face of a round bamboo floor pillar manufactured by the method according to the present invention. In this floor pillar, both sides of the back split part are slightly cut out to form narrow grooves (4).
The core material (2) is entirely housed in the hollow part of the bamboo material (1). When injecting the foamable synthetic resin material, plugs or burrs are provided at both ends of the bamboo material (1).

The core material (2) is restrained from shifting by inserting the pieces at appropriate intervals, and the resin material is injected through the groove (4).

The resin portion that foams and hardens, fills the groove portion (4) and bulges out to the outside is scraped off. The round bamboo that has been bonded and fixed through the core material and the foamed synthetic resin material in this manner can be connected to other members by driving a nail into the core material through a hole drilled with a drill.

As is clear from the above description, according to the method for manufacturing bamboo material combined with wood according to the present invention.

The moisture content of bamboo wood is at least 15% or less.

And since it is treated with insect repellent, it won't get moldy.

Since it is not susceptible to insect damage and is allowed to deform freely after being split, it can prevent the vertical cracking caused by deformation that occurs with conventional bamboo materials, and can be used in places with different climates overseas. The foamed synthetic resin material acts as a buffer against deformation caused by changes in temperature and humidity, and the bamboo itself does not undergo excessive stress, so cracks are unlikely to occur. In addition, since the core material is firmly bonded to the bamboo material through the resin member, the core material serves as reinforcement and can be easily connected and fixed to other building components by nailing through the core material. Can be made of bamboo pillars,
It has been possible to provide a manufacturing method that allows the material to be used more widely than before as a building material for Japanese-style houses such as staves.

[Brief explanation of drawings]

FIG. 1 is an external view of the end face of a floor pillar manufactured according to an embodiment of the present invention, and FIG. 2 is an external view of the end face of a round bamboo floor pillar similarly manufactured according to this embodiment. (1)...Bamboo'$li (bamboo rod) i2)...
...Square wood (core material). (3)... Foamed synthetic resin member, (4)...
... Groove. (91-41 swelling 1 figure

Claims (1)

[Claims] The felled bamboo is split at the back and joints are removed at the same time, dried naturally for about a year, and then treated with insect repellent.Then, after the bamboo has been fully expanded, both sides of the split back are cut out and spread into grooves, making the bamboo hollow. In addition to inserting wood as a core material in the
After applying a treatment to restrain the wrinkles of the core material, a foamable synthetic resin material is injected into the gap between the core material and the hollow part of the bamboo material, and the resin material is foamed and hardened to cause the bamboo material and the core material to bond. 1. A method for manufacturing a bamboo material combining wood, characterized in that the bamboo material and the core material are fixed together by filling a gap between the materials and the resin member.