JP2001173094A - Joined structure of wooden building - Google Patents

Abstract

(57) [Summary] [Problem] When bonding wooden members at a predetermined angle, a joint structure having high rigidity, excellent seismic performance, and excellent workability by improving the joint resistance of the joint. I will provide a. SOLUTION: When bonding wooden members at a predetermined angle, a connection is made between the wooden members by a finger joint, and a plurality of bolts are further penetrated through the wooden member at the joint surface. Attach. An adhesive is filled in the finger joint on the inner surface side of the joint, and a reinforcing material is provided. Thereby, when a tensile force or a compressive force is generated at the joint, the bolt and the reinforcing material bear these loads, so that the wooden member is less likely to be split, and the buckling of the joint is less likely to occur. The strength is enhanced and the structure has a sticky and high energy absorption performance, so it has excellent toughness and greatly improves seismic performance.

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 that remarkably improves the strength of a joint formed by bonding wood members such as glued laminated timber used for beams and 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.

[0003] Conventionally, the joining of these wooden members is performed as shown in FIG.
As shown in (a), each of the wooden members 11, 11 '
The end face of each of them is finger-processed, an adhesive is applied to the processed face, and the two are fitted together to join them. This joining method has advantages in that it has higher rigidity and does not use hardware, compared to joining using metal fittings such as metal fittings, so that it is excellent in economy, workability, fire resistance, and design. .

[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 directions 11a and 11'a are at a predetermined angle, there is a problem that the yield strength is equal to or less than that of the joining using metal parts. 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 an angle to the fiber direction, the proof stress decreases as the angle approaches 90 degrees. . That is, as shown in FIG. 3 (b), when a tensile force Ft in the direction of 90 degrees with respect to the fiber direction 11a is generated in the wood on the outer surface side of the joint, a fragile fracture peculiar to wood, which is split at an intermediate portion of the joint. Cause On the other hand, when a compressive force Fc in the direction of 90 degrees with respect to the fiber direction 11a is applied to the wood on the inner surface side of the joint, yielding peculiar to the wood occurs such that the inner surface side (portion A) of the joint is sunk. This part (A
Since the finger joint 12 is not completely fitted, there is a gap, and therefore, when a compressive force is applied, the joint tends to buckle.

Accordingly, wooden members 11, 11 'such as columns, beams, etc.
In the case where the joints are joined at a predetermined angle, the joints have an angle with respect to the fiber directions 11a and 11'a, and therefore, for example, received an external force P1 in the direction in which the joints close as shown in FIG. At this time, a tensile force Ft is generated on the outer surface side of the joint portion, but as the angle approaches 90 degrees, splitting tends to occur. In addition, a compressive force Fc is generated on the inner surface side of the joint, but as the angle approaches 90 degrees, it becomes more likely that the finger joint 12 is not completely fitted, and a gap is generated. Therefore, the portion is easily buckled. On the other hand, as shown in FIG. 3 (c), when an external force P2 in a direction in which the joint is opened is applied, a tensile force Ft is generated on the inner surface side of the joint, and as the angle approaches 90 degrees, the joint is split. Is more likely to occur. Thus, when any external force is applied, the joint is liable to split, so that the joint is liable to brittle fracture due to an earthquake or the like and easily collapse.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and has a joint structure which has a higher strength than a joint made of metal even when wooden members are joined at a predetermined angle by bonding, and has a high toughness and a seismic performance. Is provided.

[0007]

According to the present invention, in order to solve the above-mentioned problems, the joint structure of the wooden building according to the first aspect is characterized in that the wooden members (1, 1 ') are joined together at a predetermined angle by bonding. At the joint at the time of joining, the connection is joined by a finger joint (2), and at least one bolt (3) is connected to the joining surface with each of the wood members (1,
1 '). As a result, even if a bending moment acts on the joint and a tensile force is generated in the wooden member (1, 1 '), the bolt mounted through the wooden member (1, 1') bears the tensile force. Therefore, it acts to prevent splitting of the wooden member.

According to a second aspect of the present invention, there is provided a joint structure for a wooden building, wherein an adhesive is filled in a gap of a finger joint (2) on an inner surface side of each wooden member (1) of the joint portion, and a reinforcing material ( 6) is arranged. Thereby, it works so as to prevent the inner surface side (portion A) of the joint portion from being sunk and the joint portion from buckling.

Note 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. The same applies to the column of “Claims”.

[0010]

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

FIG. 1 is a view showing one embodiment of a joining structure of a wooden building of the present invention, (a) is a perspective view thereof, and (b).
Is a longitudinal sectional view thereof. FIGS. 2A and 2B are diagrams showing another embodiment of the joint structure of the wooden building of the present invention, wherein FIG. 2A is a perspective view and FIG. 2B is a longitudinal sectional view.

As shown in FIG. 1 (a), the present invention relates to a wooden member 1, which is formed in a pillar shape by laminating a sawn sawn plate with an adhesive.
1 'is adhesively bonded, and each wooden member 1,
Two bolts are inserted and screwed through 1 '.

That is, a V-shaped wave-shaped finger is provided as an example on the end faces of the wooden members 1, 1 'such as pillars and beams.
They are cut at a pitch of 2 mm, and they are joined with an adhesive so as to mesh with each other. At this joint, one wood member 1 is separated from another wood member 1 '.
The two bolt holes 4 penetrating the joint surface are continuously drilled substantially perpendicularly to the joint surface at a position where a uniform compression pressure can be obtained (at a position substantially equal to four equal portions of the joint surface). Although the position of the bolt hole 4 is set to a position substantially equal to four equal parts of the joint surface, if it is desired to further resist an external force for opening the joint to the joint part, the inner side of the joint part is required. (The bolt hole located on the left side in FIG. 1B) may be located outside the finger joint 2 (in the left-hand direction in FIG. 1B). For example, it may be provided so as to penetrate the wooden members 1, 1 'and the reinforcing material 6. At the tip end of each bolt hole 4, a counterbore 5 having a diameter larger than the diameter of the bolt head and the nut and substantially the same as or slightly deeper than the height of the bolt head and the nut is formed. I have. A bolt 3 is inserted into the bolt hole 4 and is screwed with a nut so as to sandwich the wooden members 1 and 1 'at the joint surface. As a result, even if an external force is applied to the joint to open or close the joint, and a tensile force is generated at the joint, the bolt 3 mounted through the wood members 1, 1 'bears the tensile force. Therefore, splitting of the wooden member is prevented. And this bolt 3
Resists the fracture of the joint to the end, resulting in a viscous structure with high energy absorption performance and excellent toughness. Further, when the wooden members 1 and 1 'are bonded and bonded by the finger joint, the finger joint connection can be pulled together to keep the pressed state until the adhesive is hardened. Here, the counterbore 5 is for improving the design property by preventing the heads and nuts of the bolts from appearing on the surfaces of the wooden members 1, 1 ', and may be drilled as necessary.

On the other hand, the finger joint 2 on the inner surface side of the joint has a gap because the finger joint is not completely fitted, so that the gap is filled with an adhesive and the block-shaped reinforcing material 6 is bonded. It is stuck with an adhesive. Since the reinforcing member 6 bears the compressive force generated on the inner surface side of the joint, buckling of the wood member at the joint can be prevented. Here, as the reinforcing material 6, a woody material such as LVL, a metal material such as an iron plate, or the like may be appropriately used, but a woody material is more preferable in terms of design.

In the above, the bolts 3 are directly attached to the wooden members 1, 1 '.
Although the description has been given of the case where
As shown in (b), a metal plate 7 may be provided on the outer surface side of the wooden members 1 and 1 ', and the bolt 3 may be attached. Thus, when the nut is screwed into the bolt and tightened, it is possible to prevent the head of the bolt 3 and the nut from sinking into the wooden members 1, 1 '. Further, by making the metal plate 7 into an L-shape, it plays a role of positioning when the wood members 1, 1 'are bonded and joined, so that the efficiency of the bonding operation can be improved.

[0016]

As described above, according to the present invention, the joint is joined by the finger joint at the joint portion when the wooden members 1 and 1 'are adhered and joined at a predetermined angle. At least one or more bolts 3 are attached through each of the wooden members 1, 1 'so that when an external force in the direction of opening or closing the joint acts on the joint, the joints of the wooden members 1, 1' Even if tensile force occurs in
Since the bolts penetrating through the wooden members 1, 1 'bear the tensile force, splitting of the wooden members is prevented.

Accordingly, even when the wooden members 1 such as columns and beams are joined in a state where the fiber direction thereof is at a predetermined angle, the joining strength is enhanced. As a result, it has a higher proof stress as compared with the joining using metal, and is excellent in economy and workability. Further, since the bolt 3 resists the destruction of the joint to the end, the structure has a sticky and high energy absorption performance, and is excellent in toughness and seismic performance is greatly improved.

Further, when the wooden members 1 and 1 'are bonded and joined by the finger joint, the finger joint can be pulled together to be united and held in a pressed state until the adhesive is hardened. This eliminates the need for press-fitting, and saves labor in the bonding operation.

Further, by disposing a metal plate 6 on the outer surface side of each of the wooden members 1, 1 'of the joint portion, it is possible to prevent the heads and nuts of the bolts from digging into the wooden members 1, 1'. Therefore, the joining strength is further enhanced.

Further, in the joint structure for a wooden building according to the second aspect, the finger joint portion 2 on the inner surface side of the joint portion is filled with an adhesive and the reinforcing material 6 is provided, so that the inner surface of the joint portion is provided. Since the compressive force generated on the side is borne by the reinforcing material, buckling of the wooden member at this portion can be prevented, and the joining strength is further improved.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a joining structure of a wooden building according to the present invention, wherein (a) is a perspective view and (b) is a longitudinal sectional view.

FIG. 2 is a view showing another embodiment of the joining structure of the wooden building according to the present invention, wherein (a) is a perspective view and (b) is a longitudinal sectional view.

FIGS. 3A and 3B are diagrams showing a joint structure of a wooden building, which has been conventionally performed. FIG. 3A is a perspective view of the joint structure, and FIG. 3B is generated at a joint when receiving an external force in a direction to close the joint. FIG. 4C is a schematic diagram illustrating a force, and FIG. 4C is a schematic diagram illustrating a force generated at a joint when an external force is applied in a direction in which the joint opens.

[Explanation of Signs] 1, 1 '... wood member 1a ... fiber direction 2 ...
Finger joint 3 Bolt 4 Bolt hole 5 Counterbore
6 Reinforcement 7 Metal plate 8 Inclined washer

Claims (2)

[Claims] At a joint portion when joining wooden members (1, 1 ') at a predetermined angle, a connection is joined by a finger joint, and at least one bolt (3) is connected to the joint surface. Is attached through a wooden member. 2. The joining of a wooden building according to claim 1, wherein a finger joint part (2) on an inner surface side of the joining part is filled with an adhesive and a reinforcing material (6) is provided. Construction.