JP2597821B2 - Joining structure and joining method of wood board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure and a joining method for a wooden board used for forming a flooring by joining elongated wooden boards side by side and joining them.

[0002]

2. Description of the Related Art Conventional examples of this kind are disclosed in Japanese Patent Application Laid-Open Nos. 1-190871 and 4-1 filed by the present applicant.
Japanese Patent Application Laid-Open No. 91001/1992 and the like. In these, floor materials are assembled by joining the side ends of long and thin wooden boards so that they can be bent freely. To join the side edges of the long and thin wooden boards, the back side of the wooden boards is stepped to form a step groove, and the side edges of the wooden boards are abutted to form a concave groove by the opposing step grooves. A hot-melt adhesive for temporary fixing is applied linearly so as to extend in the longitudinal direction between the stepped groove portions, and the adjacent wooden boards are temporarily fixed, and then longitudinally into the concave groove from above the adhesive for temporary fixing. Is filled with a permanent fixing adhesive having elasticity such as urethane resin.

[0003]

However, in the above-mentioned conventional example, a hot-melt temporary fixing adhesive and a permanent fixing adhesive having elasticity such as urethane resin are joined. Since different types of adhesives are used for bonding, the adhesives are not integrated with each other, and there is a problem that the bonding strength of the wooden board is low. Further, the hot-melt temporary fixing adhesive is liable to be broken at a low temperature, and this also has a problem that the bonding strength is weak.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a joining structure and a joining method of a wood board which can firmly join side ends of the wood board. is there.

[0005]

In order to achieve the above-mentioned object, the present invention relates to a joining structure of a wooden board, in which a side edge of the back surface of the wooden board 1 is stepped on an elongated wooden board 1 to form a stepped groove 2 and a wooden board. Side edges of the plate material 1 were butted against each other to form a concave groove 3 by the opposing step groove portion 2, and the longitudinal end of the concave groove 3 was blocked by a hot-melt type blocking adhesive 4 and then butted. The gaps between the step grooves 2 are joined in the longitudinal direction with a hot-melt temporary fixing adhesive 5, and a paper material 6 such as kraft paper is laminated on the temporary fixing adhesive 5 in the longitudinal direction. 6
Then, the fixing groove 7 is filled with an elastic permanent fixing agent 7 such as urethane resin so as to extend in the longitudinal direction of the groove 3 and joined.

Further, according to the method of joining wooden boards according to the present invention, the side edges of the back surface of the wooden boards 1 are formed in the elongated wooden boards 1 to form the step grooves 2 and the side edges of the wooden boards 1 are opposed to each other. A groove 3 is formed by the stepped groove 2 to be formed.
Adhesive for hot-melt damming 4
And hot-melt temporary fixing adhesive 5 is applied linearly so as to extend in the longitudinal direction between the stepped groove portions 3 butted against each other, and then on the temporary fixing adhesive 5 in the longitudinal direction. A paper material 6 such as kraft paper is placed on the paper material 6 and pressure-bonded to the adhesive 5 for temporary fixing, and then, like a urethane resin, extends over the paper material 6 into the groove 3 in the longitudinal direction. It is characterized by being filled with a permanent fixing adhesive 7 having a high elasticity.

Still another method of joining wooden boards according to the present invention is to form a step groove 2 by stepping the side edge of the back surface of the wooden board 1 into an elongated wooden board 1 and to join the side edges of the wooden board 1 to each other. A concave groove 3 is formed by abutting and opposing step grooves 2, and a longitudinal end of the concave groove 3 is filled with a hot-melt type blocking agent 4 for blocking, and then a paper such as kraft paper. A tape-shaped temporary fixing member 8 formed by applying a hot-melt temporary fixing adhesive 5 to the material 6 in advance is placed between the step grooves 2 where the temporary fixing adhesive 5 side is faced down. The paper material 6 is heat-pressed and temporarily fixed with a temporary fixing adhesive 5, and then the permanent fixing material having an elasticity such as urethane resin is formed so as to extend in the longitudinal direction from the paper material 6 to the concave groove 3. It is characterized by filling with an adhesive 7.

[0008]

According to the above construction, the hot-melt temporary fixing adhesive 5 and the permanent fixing adhesive 7 such as urethane resin are firmly integrated via the paper material 6 such as kraft paper. And is reinforced by the paper material 6, and the adjacent wooden board 1 is firmly joined.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the embodiment shown in FIGS. 1 to 4 will be described. The wooden board 1 is formed in an elongated piece board shape,
The floor material A is assembled by displacing a plurality of the wooden boards 1 in a stepwise manner and joining the side ends of the wooden boards 1 to each other. A step is formed on the back side of the side end of the wooden board 1 with a step groove 2.
The stepped groove portion 2 is filled with an adhesive and the wooden board 1
Are joined as follows. Side edges of the adjacent wooden boards 1 are abutted to each other to form a concave groove 3 with a pair of step grooves 2. As shown in FIG. The blocking adhesive 4 is filled and blocked, and a hot-melt temporary fixing adhesive 5 is applied between the step grooves 2 in the longitudinal direction and temporarily fixed. For example, a polyamide resin-based adhesive is used as the hot-melt-type damping adhesive 4, and an ethylene-vinyl acetate copolymer-based resin is used as the hot-melt temporary fixing adhesive 5, for example. As an example of an ethylene-vinyl acetate copolymer resin-based adhesive, there is a product called Evergrip manufactured by AC Japan Limited. After applying the temporary fixing adhesive 5 in this manner, the paper material 6 such as a belt-like kraft paper extends over substantially the entire length of the portion where the temporary fixing adhesive 5 is applied as shown in FIG. The paper material 6 is pressed by the roll 9 as shown in FIG. In this case, as shown in FIG. At this time, the roll 9 is cooled by blowing air. Since the temporary fixing adhesive 5 is pressed by the roll 9, the thickness of the temporary fixing adhesive 5 is not uneven, and the curing time of the temporary fixing adhesive 5 can be reduced. Further, since the cooling is performed with the roll 9, the curing time of the temporary fixing adhesive 5 can be reduced. Then, the temporary fixing adhesive 5 is cured by passing through the cooling zone, and as shown in FIG. 2D, the permanent fixing adhesive 7 such as urethane resin is filled into the concave groove 3 from above the paper material 6. The adjacent wooden boards 1 are joined as shown in FIG. At this time, if the permanent fixing adhesive 7 such as urethane resin is filled via the paper material 6 such as kraft paper, the unnecessary flow of the permanent fixing adhesive 7 can be suppressed. By interposing a paper material 6 such as kraft paper between the temporary fixing adhesive 5 and the final fixing adhesive 7, the temporary fixing adhesive 5 and the final fixing adhesive 7 are firmly integrated. At the same time, it can be reinforced by the paper material 6 [adding the rigidity of the paper material 6 to the softness (hotness at normal temperature) of the hot-melt adhesive]. The hot melt adhesive is easily broken at a low temperature, but the crack can be prevented by a paper material 6 such as kraft paper.

Next, an embodiment will be described with reference to an embodiment shown in FIG. In the case of the present embodiment, a tape-shaped temporary fixing member 8 in which a temporary fixing adhesive 5 is applied in advance to one surface of a paper material 6 such as a band-shaped kraft paper is used. Side edges of adjacent wooden boards 1 are abutted to each other to form a concave groove 3 with a pair of step grooves 2, and a hot-melt type end is formed on the longitudinal end of the concave groove 3 as shown in FIG. The blocking adhesive 4 is filled and blocked. Then, the tape-shaped temporary fixing member 8 is placed between the step grooves 2 with the temporary fixing adhesive 5 side down as shown in FIG. 5B, and temporarily fixed with the roll 9 as shown in FIG. The member 8 is crimped. At this time, the temporary fixing member 8 applies the temporary fixing adhesive 5 to the paper material 6 and winds it up. When used, the temporary fixing adhesive 5 is reactivated when used. May be used immediately after coating. In the case where the roll is used after being reactivated, a heated roll is used as the roll 9 to be pressed. As described above, the adhesive for temporary fixing 5
After temporarily fixing the adjacent wooden board 1 with the adhesive, the adhesive 5 for temporary fixing is hardened through the cooling zone, and a book such as urethane resin is formed in the concave groove 3 from above the paper 6 as shown in FIG. The fixing adhesive 7 is filled and the adjacent wooden boards 1 are joined.

[0011]

As described above, according to the present invention, the gaps between the butted groove portions are joined in the longitudinal direction with a hot-melt temporary fixing adhesive, and a paper material such as kraft paper is placed on the temporary fixing adhesive. Are laminated in the longitudinal direction, and the groove is filled with an elastic permanent fixing adhesive such as urethane resin so as to extend in the longitudinal direction on the paper material. The fixing adhesive and the permanent fixing adhesive such as urethane resin are integrated with paper such as kraft paper and reinforced with paper, and the adjacent wooden boards are strongly bonded. Is what is done.

[Brief description of the drawings]

FIGS. 1A and 1B show an embodiment of the present invention, in which FIG. 1A is a cross-sectional view of a main part as viewed from the front, and FIG.

FIG. 2 is a perspective view showing a joining procedure in the embodiment.

FIG. 3 is a plan view showing the same procedure.

FIG. 4 is a cross-sectional view of the same temporary fixing adhesive as viewed from the front, showing a state where the adhesive is leveled.

FIG. 5 is a perspective view showing a joining procedure of another embodiment of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wooden board material 2 Step groove part 3 Concave groove 4 Adhesive for blocking 5 Adhesive for temporary fixing 6 Paper material 7 Adhesive for fixing

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Junichi Funakoshi 1-10-1 Yurakucho, Chiyoda-ku, Tokyo Yurakucho Building AC I Japan Limited

Claims (3)

(57) [Claims] 1. A step groove is formed on a slender wooden board by stepping a side edge of a back surface of the wooden board, and a side groove of the wooden board is abutted with each other to form a groove by an opposing step groove. Of the longitudinal direction of the adhesive is blocked with a hot-melt type adhesive for bonding, and the gap between the butted butted groove portions is joined in the longitudinal direction with a hot-melt type temporary fixing adhesive to form a temporary adhesive. A paper material such as kraft paper is laminated in the longitudinal direction on the upper side, and a permanent fixing adhesive having a resilience such as urethane resin is filled into the concave groove on the paper material so as to extend in the longitudinal direction and joined. A wood board joining structure characterized by comprising: 2. A step groove is formed by stepping a side end of a back surface of a wooden board on a slender wooden board, and a groove is formed by a step groove opposing the side ends of the wood board to face each other. The hot melt adhesive for temporary fixing is applied linearly so as to extend in the longitudinal direction between the step grooves which are filled and filled with the hot melt adhesive for adhesive at the longitudinal end portion. Then, a paper material such as kraft paper is placed on the adhesive for temporary fixing so as to extend in the longitudinal direction, the paper material is pressed against the adhesive for temporary fixing, and then the paper material is longitudinally inserted into the groove from above. A method for joining wooden boards, which comprises filling a permanent fixing adhesive having elasticity such as urethane resin. 3. A stepped groove is formed by stepping the side edge of the back surface of the wooden board in a slender wooden board, and a groove is formed by the stepped grooves opposing the side edges of the wooden board butted against each other. A tape formed by filling a hot-melt adhesive for blocking at the longitudinal end of the tape and applying a hot-melt temporary fixing adhesive to a paper material such as kraft paper in advance. The temporary fixing member is placed on the stepped groove where the adhesive for temporary fixing side is facing down, and it is heated and pressed from above the paper material and temporarily fixed with the adhesive for temporary fixing,
A method for joining wooden boards, comprising: filling a recessed groove from above the paper material with a permanent fixing adhesive such as urethane resin so as to extend in the longitudinal direction.