JPH01178633A - Construction of timber junction and junction metal - Google Patents

Abstract

PURPOSE:To simplify a junction work between members by bringing the ends junction surface of timbers into contact with the junction surface of a metallic junction member and screwing an anti-tensile force bolt with an outer diameter larger than an insertion hole into the insertion hole of the timber from the inside air space section side of the junction member. CONSTITUTION:Insertion holes 27 with a specific length are provided in the ends of timbers 22 and 23 along the axial core, and through holes 34 are provided in a metallic junction member 30. Ends junction surfaces 26 of timbers 22 and 23 bring into contact with junction surfaces 31 of the junction member 30, anti-tensile force bolts with an outer diameter larger than the insertion hole 27 are screwed into the insertion holes 27 from the inside air space section side of the junction member 30, and timbers 22 and 23 are coupled with the junction member 30 by clamping reaction force of bolts. Accordingly, junctions of members can be made easily, and a firm junction can be also made.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure of a joint between constituent timbers in a wooden structure;
The present invention relates to the joint hardware used in the joint, and in particular, relates to the structure of the joint of a plurality of pieces of wood that come together at one point, and the joint hardware used in the joint.

[Prior Art] In a general wooden structure building, the structure of the joint when joining timber for the frame is as shown in the elevation view (,) and (b) in Figure 7.
) As shown in the plan views, (1) When connecting beams 2.2 from both sides of column 1 in the figure, (2) When connecting beams 2.2... from all sides of column 1 in the figure. In the case, (3) Beam 2 in the figure
When joining together by butting them together, the joining members 3a, 3b, 30, etc. are applied over each target member, and the tightening bolts 4 are used to join them. In this case, the mutual spacing and position of the ends of the bolt insertion holes drilled in each member, and the strength of the bolts to be used are determined, and a design is adopted based on the shear strength.

On the other hand, for joints where the pieces of wood to be joined are not aligned in a straight line but meet at a single point from multiple directions, there is a special joining method based on ancient woodworking techniques. There are also known examples of constructing a hipped roof by constructing a hipped roof, but this technology has not been developed as a technique that can be applied to modern large-scale buildings.

[Problems to be Solved by the Invention] In the conventional structure of joints, there is a limit to the tension in the joints created in the wood itself, such as holes or notches. Strength was supplemented by using hardware, but the holes drilled into each wooden member became larger in size as insertion holes compared to the diameter of the hole, and the play If there is slippage between the divided timber and the joining member, and repeated loads are applied, the residual strain in each member in this area will be large.

On the other hand, since wood for construction is a natural product, despite its many characteristics, it is limited in terms of resources and physical properties, so it is difficult to combine small-sized materials that are relatively easy to obtain. , wood with a larger cross section has been used, and with the development of adhesives, the use of such laminated wood has increased. However, even if laminated wood is used as the wood, the above defects cannot be qualitatively improved.

[Means for Solving the Problems] The present invention was developed with the aim of addressing the above-mentioned problems, eliminating the drawbacks, and improving the structure of joints in wooden structures. The gist is to form an integral joint as a whole by interposing a metal joint member on the axis of the joint and joining each component piece of wood to the joint member individually. The structure of the wood joint of the present invention is such that each piece of wood has an insertion hole of a predetermined length in the axial direction from its end face, and the end face of the wood is connected to a metal joint provided at the joint part. A tension-resistant bolt with an outer diameter larger than the insertion hole is screwed into the insertion hole from the inner cavity side of the joining member, and the tension-resistant bolt is in contact with the joining surface of the outer surface of the joining member, and the tightening reaction force causes multiple pieces of wood to be It is characterized by comprising a joint portion of. With this configuration, the structure of the joint by the joining method of the present invention improves the mechanical properties of the wooden structure, and is particularly suitable for large-span wooden buildings that use laminated timber with a large cross section and require rigid joints. It was a success in expanding the possibilities of things.

[Example] The structure of the wood joint of the present invention will be described in detail based on drawings showing preferred examples. FIG. 1 is a perspective view of a building employing the present invention, taking as an example a bathhouse building that requires a relatively large span. In the figure, the columns are made of steel-framed reinforced concrete, with columns 10 on the gable side and columns 11 in the girder direction consisting of side columns and buttresses. 1
2 is a foundation, and 13 is a foundation beam. The beams of the building frame are made of reinforced concrete, and the beams 20 on the gable side are loosely arched, and the girder beams 21 have a wide horizontal width. roof 5
The main beam 22 is made of wood and made of laminated wood, and the main beam 22 has a loose arch shape with both ends shaped like a figure 7, and the outer ends of the two branch parts 23 and 23 are connected to the side. At the top of column 11,
It is fixed on the girder beam 22. Between the main beam 22 and the end beam 20,
A small beam 24 is installed between the main beams, and the small beam 24 is also made of laminated wood. The main beam 22 is constructed including a branch part 23 in response to the special design conditions of the building, and cannot be constructed from a single material. Therefore, a joint part 25 is provided at the branch part to create a joint structure. It's Nishide. roof 5
The entire body is covered with a membrane 51 made of synthetic resin reinforced with fiber material.

Details of the structure of the joint portion 25 of the present invention will be explained with reference to FIGS. 2 to 5. Figure 2 is a plan view of the joint 25;
The figure is a sectional view taken along line AA in FIG. 2, and FIG. 4 is a sectional view taken along line BB in FIG. 2. In the figure, the main beam 22 and the two branch parts 23 meet at a joint 25 in a figure 7 shape from three sides on the horizontal plane, and are inclined according to the roof slope on the vertical plane. Therefore, in the present invention, the joining member 3o according to the second invention is arranged at the intersection of the axes of these members. The joining member 30 has at least three vertical joining surfaces 31 where the main beam 22 and the branch beam 23 are joined, making it approximately hexagonal, and the joining surfaces 26 at the ends of each beam 22 and 23 are formed into vertical joining surfaces 31. It comes into contact with the joint surface 31 .

Reference numeral 27 denotes an insertion hole for a tightening bolt, which is bored in the axial direction from the end of each beam member. Further, the joining member 30 is a cylindrical body having an inner cavity 32, and its side wall 33 is connected to the roof 5.
According to the slope, the main beam 22 side is higher and the branch beam 23 side is lower. A large number of through holes 34 as bolt insertion holes are bored in the upper and lower parts of the side wall 33 in the direction of each member to be joined. Due to these conditions, this joining member 3
0 is usually preferably made of cast iron.

Next, FIG. 5 shows details of a fixing bolt 40 of the present invention corresponding to the tightening bolt 4.

The fixing bolt 4o has a threaded end portion 41 and a main portion 4.
2 and a protrusion 43, the overall material is 84.5
C, the main body part 42 has a determined shaft diameter, and the screw 4
4 is threaded, and a regular thread 45 for Nando is threaded on the tip of the protrusion 43. When the insertion hole 27 is short and the inner space 32 of the joining member 25 is large, the protrusion 43 of the tightening bolt 40 may have a head at the portion of the thread 45.

FIG. 6 shows another embodiment of the joining member 30, in which a shear-resistant reinforcing plate 35 is attached to each joining surface 31 to be attached to the end of the members to be joined. . This shear-resistant reinforcing plate 35 corresponds to the joining member 3 of the prior art, and similarly connects each member with the tightening bolt 4, so the detailed explanation will be given except for the interposition of the joining member 30. can be omitted.

[Function] The function of the structure of the wood joint of the present invention will be explained based on the process of assembling and constructing the joint.

Beam members that meet at one point from a plurality of directions can be obtained as laminated timber members with relatively free dimensions, and the main beam 22 for large spans is formed in an arch shape. Next, an insertion hole 27 having a diameter larger than the shaft diameter of the fixing bolt 40 is bored in the joint surface 26 of each beam material 22, 23 to be joined, corresponding to the screw 44 of the fixing bolt 40. When screwed in from the tip end 41, the main body 42 serves as an anchor to form a tension-resistant bolt, and the remaining protrusion 43 serves as a joint between the beams. The joint surfaces 26 of the beam materials 22 and 23 prepared in this way are faced to the joint surface 31 of the joint member 30, and the protrusion 43 is inserted into the through hole 34,
After applying the washers 46, if the nuts 47 are tightened, each joining surface 31 of the joining member 30 and each joining surface 26 of the main beam 22 and branch beam 23 will come into contact, and the beams 22 and 23 on both sides will be connected. The members 30 are joined together in the slope direction of the roof 5 to form a joint 25. Of course, unlike when used as a shear bolt, many tightening bolts 4 are not exposed and there is no lateral play.
There is no decrease in initial stiffness, and the problem of residual strain is also resolved.

Furthermore, since the joint member 30 is obtained as a cast product, it not only easily follows the roof slope of the main beam 22 and the branch beam 23, but also allows the joint surface 30 to correspond to the joint surface 26 of the main beam 22 and the branch beam 23. can be formed into a member having
Particularly, the joint surface 3 that coincides with the axial direction of the members to be joined
1 can be adapted to the joint surfaces 26 of the beams in any meeting direction. Furthermore, this joining member 30 is configured as a cylindrical body, and the inner cavity 33 provides an ideal space for tightening the nut 47 during final fixing of the fixing bolt 40.
It is extremely easy to join from any direction.

Next, since the fixing bolt 40 is mainly for tensile strength,
In the bonded structure of laminated wood, the anchoring force of the main body is large, and the bonding surface with the bonding member 30 is always stable, and the forces on the axis of the bonded portion 25 are balanced. Complex joints are rationally integrated.

Furthermore, reinforcement against shear force can be easily implemented in the same manner as in the conventional technology by simply employing a shear-resistant reinforcing plate.

[Effects of the Invention] The method for joining laminated wood of the present invention is such that in the structure of a joint of a plurality of pieces of wood that meet at one point, each piece of wood has an insertion hole of a predetermined length in the axial direction from its end face. Yes, the end surface of the wood is brought into contact with the joint surface of the outer surface of the metal joint member provided at the joint part, and the tension-resistant material whose outer diameter is larger than the insertion hole is inserted from the inner cavity side of the joint member into the insertion hole. Bolts are screwed in, and the joints of multiple pieces of wood are formed by the reaction force of the tightening, so it is possible to achieve joints between each component with a simple structure, and at the same time, it is possible to connect each component. Not only can the axial force be transmitted only through the shaft center, but also the force can be smoothly transmitted in any direction, especially in the joining member adopted in the present invention. On the other hand, the structure of this joint can be formed using easily available materials, and it can be easily assembled without the need for special techniques. We are able to respond to construction projects of various sizes at any time. In addition, the structure of the joint part has the advantage that it can be handled by casting the joint member of the second invention, and there is a large degree of freedom in design, and when using laminated wood, the softness, beauty, etc. The advantages of this can be extended to greater freedom of design and can accommodate beautiful curves, etc. Moreover, since it does not affect the basic form of the cylindrical body of the metal joint, the present invention is a truly excellent invention with great prospects for the structure of joints of wood.

[Brief explanation of the drawing]

The drawings are for explaining the structure of the joint of wood according to the present invention based on an example, and FIG. 1 is a plan view showing the entire building of the application example, and FIG. 2 is a plan view of the joint member of the present invention. Figure, 3rd
The figure is a cross-sectional view taken along the line A-A in Figure 2, Figure 4 is a cross-sectional view taken along the line B-B in Figure 2, Figure 5 is a side view of the tension-resistant bolt, and Figure 6 is a cross-sectional view taken along the line B-B in Figure 2. Another example of the member is shown, in which the (a) figure is a plan view and the (b) figure is a side view. Figures (1), (2), and (3) in Fig. 7 are drawings for explaining the structure of a conventional joint in terms of an elevational view (a) and a plan view (b). 1. Column material, 2. Beam, 3. Connection member, 4. Tightening bolt, 5. Roof, 10.11... Column, 20... Gable pillar, 21... Side pillar, 22... Main beam, 23. Beam of branch part, 25.. Joint part, 26.. Joint surface, 27.. Insertion hole, 30.. Joint member, 31.. Joint surface, 32.. Inner space, 33. ...Side wall, 34...Through hole, 35...Shear-resistant reinforcing plate, 40...Fixing bolt, tension-resistant bolt, 41
...Tip part, 42. Main body part, 43. Protrusion part, 44.
・Screw, 45... Ordinary screw, 46... Washer,
47...Natsuto. Patent Applicant Shimizu Corporation Agent Patent Attorney Shojiku Inaba "Kuchigoi." (0) (b) Figure 6 (o) 3. /30 Gunji] 1) 31

Claims (3)

[Claims] (1) In the structure of a joint of a plurality of pieces of wood that come together at one point, each piece of wood has an insertion hole of a predetermined length in the axial direction from its end face, and the end face of the wood is inserted into the joint. A tension-resistant bolt with an outer diameter larger than the insertion hole is screwed into the insertion hole from the inner cavity side of the joining member, and the bolt is in contact with the joint surface of the outer surface of the metal joining member. A structure of a joint of a plurality of pieces of wood, characterized in that the joint of a plurality of pieces of wood is made up of: (2) In a joining hardware used for joining multiple pieces of wood that come together at one point, this joining hardware is a cylindrical body made of metal, and the outside surface has a joining surface on which the end surfaces of the pieces of wood to be joined come into contact. 1. A joining hardware for use in joining parts of wood, characterized in that the joining hardware has an insertion hole for a tension-resistant bolt projecting from the end face of the wood in its plane. (3) A shear reinforcing plate for reinforcing the adhesion of the ends of the timbers is provided on the joining surface where the timbers come into contact, protruding in the joining direction of the timbers, according to claim 2. Joint hardware used for joining wood.