JP3388336B2 - How to join wood structural materials - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining wood materials, and more particularly to a method for joining wood materials in which at least one of them is a wood material, such as when both are wood materials and one is a different material.

[0002]

2. Description of the Related Art Generally, wood joining methods include mortise and dovetail joining methods, in which concave and convex portions of one member are combined with concave and convex portions of another member. Most things. In particular, in order to further enhance the degree of fitting, many of them have been fitted with wedges (wedges) at the fitting portion to cover the looseness of the wood later due to drying. However, if the wood is not dried sufficiently, no matter how precisely the joint is processed, it often becomes loose after a couple of years, and the wedges that have been hammered in have no effect at all. Therefore, even in wooden houses, there are cases where metal joint members are used for joints, but metal members (metal objects) also rust for a long time under high temperature and high humidity, and the resulting acid Wood is often damaged by, and it is often seen that both wood and hardware fall apart. This low degree of fitting at the joints of wooden houses can be seen not only when the house shakes greatly but also when it collapses during an earthquake or typhoon.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a method for joining wooden structural members that can be joined firmly without using a joining auxiliary member such as a metallic member.

[0004]

According to the method for joining a wooden structure material of the present invention, either or both of a concave portion and a convex portion of a joint portion of a wooden structure material to be joined are consolidated at high temperature and high pressure,
After the joint has been compacted fitted, to restore the compaction unit
It is a method characterized by integrating as one. In addition, as the member to be consolidated, a built-in member such as a wedge, which is usually incorporated in the concave-convex fitting portion as needed, is also included.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a joint portion of a wooden structural material used in a wooden construction or the like is preliminarily consolidated under high temperature and high pressure to reduce its cross-sectional area so that a concave portion and a convex portion are joined together. After that, it is a method of realizing a joint with no gap by restoring it with water or the like.

The wooden structural material to which the present invention can be applied includes
Without being particularly limited, Dahl Fur, cypress, cedar,
It can be used as long as it can be consolidated regardless of whether it is a broadleaf tree or a conifer such as a Japanese zelkova, a pine, etc. Especially, it is advantageous in the case of a softwood such as a cedar which has a large consolidation. The wooden structural material does not have to be a solid material and may be a laminated material as long as it can be consolidated.

[0007] Consolidation is usually carried out at a joint, that is, at least one of a convex portion and a concave portion to be fitted, but depending on the case, the entire wooden structural material or the joint portion and a portion including the joint portion are consolidated. Good. From the viewpoint of ease of compaction, the fitting protrusion is usually made compact, but it is particularly easy to implement a fitting protrusion having a shape in which the tip is wider than the base, such as a "tenon" to be fitted in a dovetail hole. When the wooden structural material is a laminated material, it is usually consolidated in the laminating direction. In the case of a laminated material, it is advantageous to dispose a member that is easily consolidated, such as a cedar material, on the single plate serving as the surface layer. The member to be consolidated is not limited to the fitting member having the convex portion or the concave portion, but may be a driving member such as a wedge driven between them.

The compaction ratio depends on the wood material and can be compressed to 1/4 of the volume, that is, about 25%, but in the case of the present invention, it is preferable to compress within a recoverable range. Is 20% or less, 10-18%
It is recommended to consolidate within the range. In the case of consolidation in only one direction, for example, only in the thickness direction, it is possible to compress up to about 50%. The restoration of the compacted material after joining is usually in accordance with the restoring force of the wood material due to the absorption of water, but if necessary, a chemical that stops the absorption of water, such as a surfactant, may be added. In addition, a treatment agent such as an adhesive agent, an antiseptic agent, an insect repellent agent, an antitermite agent, a fireproof agent, an antifungal agent, or a dimension stabilizer may be applied when restoring the compacted portion. A curable water-soluble resin liquid or the like may be used as the dimension stabilizer. The water or the treatment agent may be applied directly to the consolidation material, or may be a method of interposing a paper or foamed plastic sheet impregnated with these materials in the joint portion.

Although consolidation can be performed at the construction site,
Since a device for heating and pressurizing is required, it is usually advantageous to consolidate and supply in a factory or the like. Since the compaction material sometimes absorbs moisture in the atmosphere and restores it, it is preferable to pack it in a moisture-proof package such as a polyethylene bag in the case of a small member such as wedge. In the case of large pillars, bases, etc., cover the consolidation area with a heat-shrinkable film such as polyvinylidene chloride film, or apply a coating agent that forms a peelable moisture-proof coating to the consolidation area. It is good to

[0010]

Industrial Applicability According to the present invention, after joining a joint portion of a wooden structural material used in a wooden construction or the like in advance under high temperature and high pressure to reduce the cross-sectional area, the concave portion and the convex portion are joined together. By joining with water, etc., a joint with no gap is realized. According to this method, the one having a larger cross-sectional area than that of the ordinary joint is compacted by compaction, so that the strength exceeding the conventional joint strength can be obtained. If the wood gets dry over a long period of time,
Even if it shrinks, no gap will be created if it is restored more than the amount of shrinkage due to further consolidation and compression.

Further, when restored, paying attention to the fact that the porous wood absorbs the liquid like the crushed sponge absorbs the water, and the like, the water-based fungicides, preservatives, insect repellents, coloring agents, etc. If a resin or chemical agent that is effective for dimensional stabilization is used to absorb these into the wood material, it can be penetrated into the interior by the depressurizing effect, which helps strengthen the weakest structural joint.
Furthermore, if a water-based adhesive, a foaming adhesive or the like is used in combination with these resins or chemicals, it is possible to completely fix the joint. This means that the weakest joints of wooden houses, especially framed houses, will be improved to the same level as other parts, extending the life of framed houses and greatly improving safety. It has various excellent effects.

[0012]

Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to these embodiments. An example figure shows an example of joining a pillar of a house and a foundation. The tenon 2 provided at the lower end of the pillar 1 was fitted into the dovetail hole 4 of the base 3 to join the two. Vertical 10.5 cm × horizontal 10.5 cm × for pillar 1
Long-tailed hemlock material with a length of 300 cm, and vertical 12.0 as the base 3
A cm x horizontal 12.0 x 400 cm atopin base was used. The column 1 to be consolidated is preheated to 150 ° C. in advance, and the tenon 2 provided at the lower end of the column 1 is then heated to 200 ° C. with a mold.
It was heat-pressed for 2 minutes under the condition of 30 kg / cm ² . By this compression process, the tenon 2 has the following dimensions: Before compression: width (W ₁ ) 5 cm x length (L ₁ ) 6 cm x height (H ₁ ) 6 cm After compression: width (W ₂ ) 3 cm x length (L ₂ ) 6 cm × height (H ₂ ) 6 cm (see FIG. 1).

As shown in FIG. 2 and FIG. 3, the compressed tenon 2'of the pillar 1 is opened at the upper surface: width (w ₁ ) 3 cm x length (l ₁ ) 6 cm x height (h ₁ ) 6 cm bottom part: Width (w ₂ ) 4.5 cm × length (l ₂ ) 6 cm × height (h ₂ ) 6 cm It was inserted into the dovetail hole 4. When inserting the compacted tenon 2'of the hemlock pillar 1 into the dovetail hole 4 machined in the Apiton base 3, the water-based vinyl urethane resin adhesive is preservative-prevented (sankyo Co., Ltd., Sunplus). , Lectus S
S. ) Is mixed thoroughly into the tenon 2'and the pillar 1
Incorporated. The compression tenon 2'of the pillar was restored in about 10 seconds,
It was integrated with the adhesive along the holes in the base. After the adhesive was hardened, the tenon 2 did not come off at all, and the pillar 1 was firmly bonded to the Apiton base 3.

[Brief description of drawings]

FIG. 1 is a perspective view showing consolidation of columns.

FIG. 2 is a side view showing a state before the pillar is assembled to the base.

FIG. 3 is a side view showing a state in which a pillar is assembled to a base.

FIG. 4 is a perspective view showing a tenon shape of a pillar.

[Explanation of symbols]

1 pillar 2 mortise 3 Atopin base 4 dove holes

Claims (4)

(57) [Claims] 1. A concave portion provided in a joint portion of one member
The joining method of the wood structural member for coupling by fitting a convex portion or the embedded member is provided at the junction of the other member, before
The convex portion provided at the joint portion or the member incorporated into the joint portion is subjected to consolidation treatment at high temperature and high pressure so that the volume is 10 to 20.
% To fit in the recess of one member
The size Satoshi, after the convex portion or the embedded member and piezoelectric densification mating or assembled in the recess, joining method of the wood structural member, which comprises integrated by restoring the pressure densification process unit that. 2. The method according to claim 1, wherein the convex portion or the incorporated member of the joint portion subjected to the consolidation treatment is covered with a plastic film, or a peelable moisture-proof coating agent is applied for moisture-proof treatment, and peeling is performed at the time of joining. Item 1. The joining method according to item 1. 3. A member to be incorporated into a joint is wedge, and is subjected to a moisture-proof treatment by consolidating at high temperature and high pressure and coating with a plastic film or by applying a peelable moisture-proof coating agent. The joining method according to claim 1 or 2. 4. A treatment agent such as water or an adhesive agent, an antiseptic agent, an insect repellent agent, an antitermite agent, a fireproof agent, a fungicide or a dimension stabilizer.
Insert impregnated paper or foam plastic sheet into the joint
Joining method of claim 1, wherein the bonding by Zaisa.