JP2001090189A - Joined structure of wooden building - Google Patents

Abstract

(57) [Summary] [PROBLEMS] When adhesively joining wooden members at a predetermined angle, by increasing the joining strength of a joint portion, rigidity is higher than joining using metal parts such as metal joint metal parts. ,
Improve workability, fire resistance, and design. When joining wooden members at a predetermined angle, the joints are joined by finger joints between the wooden members, and a plate-like reinforcing material is attached to the joint surface. Thereby, when a tensile force or a compressive force is generated at the joint portion, the reinforcing member bears these loads, so that the wooden member is less likely to split, and the finger portion is less likely to buckle, and the joining strength is reduced. Is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pillar of a wooden building,
The present invention relates to a structure for significantly improving the strength of a joint portion of a wooden member such as a laminated timber used for a beam or the like.

[0002]

2. Description of the Related Art Structural laminated lumber and structural lumber are used as main structural materials forming the framework of wooden buildings such as school facilities, sports facilities, and regional symbol facilities. In order to correspond to the size of a building, these wooden members are used by processing (pre-cut) a stock beam mainly made of a straight material that has been produced in advance and joining them.

Conventionally, as shown in FIGS. 8 and 9, the joining of these wooden members is performed by performing finger processing on the end surfaces of the respective wooden members 1 and 2, applying an adhesive to the processed surfaces, and fitting them together. A joining method is adopted.
This joining method is higher in rigidity compared to joining using metal fittings such as metal joints such as bolts, and because it does not use metal, it is excellent in economy, workability, fire resistance, and design Also has the advantage of being superior.

[0004]

However, in the above-mentioned adhesive joining, when joining in the axial direction, it has a higher proof stress than joining using metal fittings. When joining in a state where the fiber direction 7 is at a predetermined angle, there is a problem that the proof strength is equal to or less than that of the joining using metal. This is due to the anisotropy of the wood. When the wood receives a tensile force Ft or a compressive force Fc in a direction having a predetermined angle (θ) with respect to the fiber direction, the angle (θ) becomes 90 degrees. The proof stress decreases as the degree approaches. That is, when a tensile force Ft in the direction of 90 degrees with respect to the fiber direction 7 is applied to the wood, the wooden member 1 such as a column or a beam is joined via the block-shaped wooden member 2 to FIG. As shown, a split 8 occurs on the outer surface side of the joint. Also, wooden members 1 such as columns and beams
In the case where the pieces are joined to each other, a split 8 is generated on the outer surface side of the joint portion as shown in FIG. 9B. On the other hand, when a compressive force Fc in the 90-degree direction is applied to the wood with respect to the fiber direction 7,
As shown in FIGS. 8 (b) and 9 (b), yielding peculiar to wood occurs such that the inner surface side (portion A) of the spliced portion sinks. In addition, since this portion is not completely fitted with the finger but is partially exposed, when a compressive force is applied, the portion buckles.

Accordingly, when the wooden members 1 such as columns and beams are joined at a predetermined angle, the joints have a predetermined angle with respect to the fiber direction 7, and this angle (θ) is 90 °.
As the temperature approaches, there is a drawback that the yield strength is inferior to the joining method using a metal.

The present invention has been made in view of the above-mentioned drawbacks, and has as its object to provide a joint structure having a higher yield strength than that of a metal member even when a wooden member is bonded and joined at a predetermined angle.

[0007]

According to the present invention, in order to solve the above-mentioned problems, the joint structure of a wooden building according to the first aspect of the present invention provides a joint structure for joining wooden members at a predetermined angle. The joint is joined by a finger joint, and a reinforcing material is attached to the joint surface. With this, even if a tensile force is generated at the finger tip of the wooden member B when a bending moment is generated at the joint, the reinforcing material attached to the joint portion bears the tensile force. Splitting will be prevented. Further, even if a compressive force is generated in the finger portion of the wooden member, the reinforcing material attached to the joint portion bears the compressive force, so that buckling at the finger portion can be prevented.

According to a second aspect of the present invention, there is provided a joint structure for a wooden building, wherein a reinforcing material is attached to a finger surface of the finger joint.

According to a third aspect of the present invention, there is provided a joint structure for a wooden building, wherein a reinforcing material is attached to a flat surface of a finger in the finger joint.

[0010] In the joint structure for a wooden building according to a fourth aspect, the wooden members are joined together via a block-like wooden member. With this, when wooden members such as a girder are attached orthogonally to these wooden members at the outer side corners of the joints of the wooden members, the wooden members can be attached by finger joints like joining of wooden members. Therefore, the finger joint does not suffer from a loss due to tension or compression with a wooden member such as a girder, so that even when a wooden member such as a girder is attached, the joining strength can be improved.

The block-shaped wooden member according to claim 5 is obtained by alternately fixing a plurality of plate-like wooden members with an adhesive in a direction in which the fiber directions of the plate-like wooden members are orthogonal to each other. As a result, the strength of the block-like wooden member in the transverse tension direction increases, and splitting hardly occurs.

It should be noted that reference numerals in parentheses are for convenience showing corresponding elements in the drawings, and therefore, the present invention is not limited to the description on the drawings.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1A is a perspective view showing an embodiment of a joint structure of a wooden building of the present invention, FIG. 1B is a longitudinal sectional view thereof, and FIG. 1C is FIG. It is a longitudinal section showing another example of (a). FIG. 2 is a perspective view showing a block-shaped wooden member used in the joint structure of the wooden building of the present invention. FIG. 3 is a perspective view showing a second embodiment of the joint structure of a wooden building according to the present invention. FIG. 4 is a perspective view showing a third embodiment of the joint structure of a wooden building according to the present invention. FIG. 5 is a perspective view showing a second embodiment of the joining structure of the wooden building of the present invention. FIG. 6 shows FIG.
FIG. 7 is a perspective view showing a second embodiment of the present invention. FIG. 7 is a third view of FIG.
It is a perspective view which shows the Example of FIG.

In the present invention, as shown in FIGS. 1 (a) and 1 (b), saw-milled plates are laminated and bonded with an adhesive to form columnar wooden members 1, 1 via a block-like wooden member 2. Then, the reinforcing member 3 is fixed to each finger surface 5 of the joint portion with an adhesive.

V-shaped fingers are engraved on the end faces of the wooden member 1 such as columns and beams and the wooden end of the block-shaped wooden member 2 at a pitch of 12 mm as an example. Are joined. In this joint portion, the reinforcing members 3, 3 are provided on the finger surfaces 5 , 5 , which are the surfaces on which the finger joints 4 can be seen (the outer surface side of the finger joint portions), of the wooden members 1 such as columns and beams, and the block-shaped wooden members. 2 are fixed with an adhesive. Here, plywood, LV
A plate material such as L, a metal plate material such as a steel plate, a carbon fiber sheet and other plate materials having excellent strength are suitable. Thus, when a bending moment is generated at the joint portion, the reinforcing material 3 bears the tensile force generated at the finger end of the block-shaped wooden member 2, and the splitting of the block-shaped wooden member 2 is prevented. Will be.

When the reinforcing member 3 is attached to the joint portion, the wooden member 1 such as a pillar, a beam or the like and a block-shaped wooden member having a size corresponding to the thickness of the reinforcing member 3 as shown in FIG. The reinforcing member 3 may be attached by cutting the upper surface of the second member 2.
As a result, the reinforcing material is flush with the wooden members such as columns and beams, and the design is excellent.

Further, when a wooden member such as a girder is attached to the joint portion at a right angle, the wooden member is attached to the outer corner of the block-shaped wooden member (not shown). It does not become the attachment at the finger joint part like. Thereby, since the finger joint does not suffer from loss due to tension or compression with the wooden member such as the spar, the joining strength can be improved even when the wooden member such as the spar is attached.

The block-shaped wooden member 2 is shown in FIG.
As shown in the figure, a plurality of plate-like wooden materials 21 such as sawn sawn boards are formed by alternately laminating and bonding with an adhesive in a direction in which the fiber directions of the plate-like wooden materials are orthogonal to each other. Are laminated and bonded in such a manner that their fiber directions are orthogonal to each other, so that the strength in the transverse tension direction to be split increases, and splitting hardly occurs. Furthermore, in order to increase the proof stress, a fiber sheet 22 such as aramid fiber may be sandwiched between plate-like wooden materials to be composited.

The case where the reinforcing member 3 is attached to the finger surfaces 5 and 5 of the joint portion has been described above. However, as shown in FIG. 3, the flat surfaces 6 and 6 where the finger surfaces are not visible are reinforced. Materials 3 and 3 may be adhered and fixed with an adhesive. In this case, the reinforcing members 3 and 3 are attached to the wooden members 1 and 1 such as pillars and beams and the wooden member 2 in a block shape. Therefore, the force transmitted to the wooden member is reduced, and the wooden member is less likely to be split.

Further, as shown in FIG. 4, a block-shaped reinforcing material 3 'may be fixed to the inner surface side of the joint portion with an adhesive. Since the compressive force generated on the inner surface side of the joint portion is borne by the reinforcing member 3 ′, the buckling of the finger portion 4 can be prevented.

Next, a case where the wooden members 1 and 1 such as columns and beams are joined together without using the block-shaped wooden member 2 will be described.

In FIG. 5, wooden members 1, 1 such as columns and beams are shown.
The V-shaped wave-shaped fingers are cut at an interval of 12 mm, for example, on the end face of the wood tip, and these are joined by an adhesive so as to mesh with each other. In this joint portion, the reinforcing material 3 is fixed to the finger surface 5 (the outer surface side of the finger joint portion), which is the surface on which the finger joint 4 can be seen, with an adhesive over the wooden members 1, 1 such as columns and beams. ing. Here, as the reinforcing material 3, a plate material obtained by bending a metal plate material such as a steel plate, a carbon fiber sheet, or another plate material having excellent strength is suitable. As a result, when a bending moment is generated in the joint portion, the reinforcing member 3 bears the tensile force generated on the outer surface side of the finger portion of the wooden member 1 such as a column or a beam, and the wooden member such as a column or a beam. 1 will be prevented from splitting.

As shown in FIG. 6, the reinforcing member 3 may be fixed to the flat surfaces 6 , 6 on which the finger surfaces cannot be seen by using an adhesive. In this case, the reinforcing material 3
It is to be applied to both the wooden members 1 and 1 such as pillars and beams. However, since the tensile force is also transmitted to the reinforcing members 3 and 3, the force transmitted to the wooden members is reduced. That is, splitting is less likely to occur.

Further, as shown in FIG. 7, a block-shaped reinforcing member 3 'may be fixed to the inner surface side of the joint portion with an adhesive. Since the compressive force generated on the inner surface side of the joint portion is borne by the reinforcing member 3 ', buckling of the finger portion 4 can be prevented.

[0026]

As described above, according to the present invention,
Wooden members 1 such as pillars, beams, etc.
In the adhesive joining, the reinforcing material 3 is attached to the finger surface 5 and the flat surface 6 of the joint portion with an adhesive, so that when a bending moment is generated in the joint portion, the block-shaped wood member is used. The tensile force generated at the tip of the second finger portion is borne by the reinforcing member 3, so that the wooden member of the block shape is less likely to be split. In addition, in the adhesive bonding between the wooden members 1 such as columns and beams, the lateral tensile force generated on the outer surface side of the joint portion between the wooden members is also transmitted to the reinforcing member 3, so that the force transmitted to the wooden members is reduced. As a result, the wooden member 1 is less likely to be split.

Further, by attaching a block-shaped reinforcing member 3 'to the inner surface of the joint portion with an adhesive, the compressive force generated on the inner surface side of the joint portion is borne by the reinforcing member. Buckling can be prevented.

Further, since the wooden members 1 are joined together via the block-shaped wooden member 2, when the wooden members such as the girders are orthogonally mounted at the outer corners of the joint portion, the wooden members 2 are joined together. Since it will be attached to the outer corner of the outer surface, the finger joint will not be damaged due to tension or compression with the wooden member such as the girder, so even if the wooden member such as the girder is attached, the joint resistance will be improved. I can do it.

The block-shaped wooden member 2 is formed by alternately laminating a plurality of plate-like wooden members such as sawn timbers with an adhesive in a direction in which the fiber directions of the plate-like wooden members are orthogonal to each other. Since the respective plate-like wooden materials are laminated so that their fiber directions are orthogonal to each other, the strength in the transverse tensile direction to be split increases, and splitting is less likely to occur. Furthermore, by sandwiching the fiber sheet 22 made of aramid fiber or the like between the plate-like wooden materials and combining them, the strength is further reinforced, and splitting is less likely to occur.

Therefore, even when the wooden member 1 such as a pillar or a beam is joined in a state where the fiber direction thereof is at a predetermined angle, the wooden member 1 has more proof strength than the joint using the metal, and is more economical than the case where the metal is used. Excellent workability, fire resistance and design.

[Brief description of the drawings]

FIG. 1A is a perspective view showing one embodiment of a joining structure of a wooden building according to the present invention, and FIG. 1B is a longitudinal sectional view thereof. (C) is a longitudinal sectional view showing another embodiment of (a).

FIG. 2 is a perspective view showing a block-shaped wooden member used for a joint structure of a wooden building of the present invention.

FIG. 3 is a perspective view showing a second embodiment of the joining structure of a wooden building according to the present invention.

FIG. 4 is a perspective view showing a third embodiment of the joint structure for a wooden building according to the present invention.

FIG. 5 is a perspective view showing a second embodiment of the joint structure for a wooden building according to the present invention.

FIG. 6 is a perspective view showing a second example of the second embodiment of the joint structure for a wooden building according to the present invention.

FIG. 7 is a perspective view showing a third example of the second embodiment of the joint structure for a wooden building according to the present invention.

FIG. 8 (a) is a perspective view showing an example of a conventional joint structure for a wooden building, and FIG. 8 (b) is a longitudinal sectional view thereof.

FIG. 9A is a perspective view showing another example of a joint structure of a wooden building which has been conventionally performed, and FIG. 9B is a longitudinal sectional view thereof.

[Explanation of symbols]

1 wood member 2 block wood member 2
DESCRIPTION OF SYMBOLS 1 ... Wooden board material 22: Fiber sheet 3, 3 '... Reinforcement material 4 ...
Finger joint 5 Finger face 6 Flat face 7 Fiber direction 8 Splitting

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[Procedure amendment]

[Submission date] December 6, 1999 (1999.12.
6)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

FIG. 5

FIG. 6

FIG. 7

FIG. 8

FIG. 9

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2B250 AA01 AA02 BA04 BA05 DA04 EA01 EA13 EA15 EA17 FA09 FA15 FA31 FA41 GA05 2E125 AA03 AA13 AB12 AC24 AG03 BB03 BB09 BB25 BD00 BD01 CA00 CA81

Claims (5)

[Claims] 1. A wooden building, characterized in that in a joint portion at the time of bonding and joining wooden members at a predetermined angle, a joint is joined by a finger joint, and a reinforcing material is attached to the joint surface. Joint structure. 2. The joint structure for a wooden building according to claim 1, wherein a reinforcing material is attached to a finger surface of the finger joint. 3. The joint structure for a wooden building according to claim 1, wherein a reinforcing material is attached to a flat surface of the finger in the finger joint. 4. The wooden members are joined together via a block-shaped wooden member.
The joint structure of the wooden building described. 5. The block-like wooden member is formed by laminating and fixing a plurality of plate-like wooden members alternately in a direction in which fiber directions of the plate-like wooden members are orthogonal to each other. Item 4. A joined structure of a wooden building according to items 1 to 4.