JP2009215786A - Joint structure of wood structural member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure of a wood structural member attaining an efficient and economical structural design as a result of easily and economically enhancing compressive strain strength which is local compressive strength of the wood structural member by providing a reinforcing member made of high strength wood of the same quality as the wood structural member, at a peripheral part of a hole for passing a drift pin or a bolt in the wood structural member. <P>SOLUTION: The joint structure of the wood structural member 2 joined through a joint plate 3 inserted in a slit 4 formed in the material axis direction of the wood structural member 2 and joined to the wood structural member 2 by the drift pin 7 or bolt is provided with the reinforcing member 8 made of high strength wood at the peripheral part of the hole 6 for passing the drift pin 7 or bolt in the wood structural member 2 to enhance the compressive strain strength of the wood structural member 2 to the drift pin 7 or bolt. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention belongs to the technical field of a joining structure of a wood structure material formed by joining a joining plate and a wood structure material such as lumber, laminated wood, or single-plate laminated material (LVL) using drift pins or bolts. .
The member provided with the joining plate is generally a pillar, a beam, or the like, and may be a reinforced concrete structure, a steel reinforced concrete structure, or a steel structure as well as a wooden structure (a wooden structure material).

  When constructing a structure using wood structures such as lumber, laminated lumber, or single plate laminate (LVL) for structural materials such as beams, pillars, trusses, etc., the joining plate is connected from the joining end of the wood structure. A technique of inserting into a slit formed in the material axis direction and joining the joining plate and the wooden structure material with a drift pin or a bolt is widely implemented (for example, refer to Patent Documents 1 and 2).

In general, the wood structure material has a high bending / compression strength, but has a low compressive strength, which is a local compressive strength. Strength and rigidity were greatly impaired. This means that the necessary cross-sectional dimensions of the wooden structural material used for the beam and the like are determined by the joint strength, and the original bending strength and compressive strength of the wooden structural material are not effectively used.
In other words, in implementing the above-described technology, the most important thing is the design of the joint, and the quality of the joint has a great influence on the safety of the structure. In many cases, it is used for long beams, etc., and since bending stress and shearing force are applied intensively due to severe load conditions and joining of bolts, etc., it was necessary to design a cross section more than necessary.
For this reason, in order to ensure the rigidity of the entire frame, a structural design in which many face materials such as braces and earthquake-resistant walls are usually arranged is inefficient and uneconomical.

Incidentally, in Patent Document 3, as shown in FIG. 4 of the same Document 3, bolt holes 7 and 8 provided in the laminated material (wood structure material) 1 and the joint (joining plate) 2 respectively, and the outer periphery of the bolt 3 Is filled with a delay-type expansion material having a function of expanding so as to be filled with time, and the expansion portion filled with the expansion material filled in the clearance is formed ( An invention is disclosed in which the laminated material 1 and the bolt 3 are integrally coupled to each other through the configuration shown in FIG.
According to this invention, it is described that the laminated material 1 and the bolt 3 are integrally coupled through the expansion material, and as a result, the initial slip at the time of life and death load can be reduced. (Refer to paragraph [0042] of the same document 3, section of effect of invention).

No. 7-28248 Japanese Patent Laid-Open No. 9-177172 JP 2004-339725 A

Although the invention according to Patent Document 3 has an effect of reducing the initial slip at the time of life-and-death load, it has not yet solved the problems peculiar to the wooden structure material such as laminated wood, and the vicinity of the drift pin or the bolt However, there still remains a problem that the local deformation occurs and the strength and rigidity of the whole joint are greatly impaired.
This is because the gap between the wood structure material (glued material) 1 and the bolt 3 is filled with a delay type expansion material such as epoxy resin, which is different from the wood structure material, so that the local compressive strength is embedded. This is because the strength cannot be increased, and the gap is structurally designed as a cross-sectional defect of the wooden structure material.
Therefore, the invention according to Patent Document 3 also has a structural design in which a large number of face materials such as braces and earthquake-resistant walls are usually arranged in order to ensure the rigidity of the entire frame, and is said to be inefficient and economical. Yeah.

  In addition, the invention according to Patent Document 3 uses a delay-type expansion material such as an epoxy resin, which is clearly inferior in fire resistance as compared with a wooden structure material, as an essential component, so that the expansion material is heated by heat during a fire. There is also a problem that there is a high possibility that the structure will be collapsed starting from the joint. In addition, since a certain time is required for the delay-type expansion material to expand and exhibit the required strength, there is also a problem that the work period is extended accordingly.

  It is an object of the present invention to provide a wood material simply and economically by providing a reinforcing material made of high-strength wood of the same quality as the wood structure material around the hole portion of the hole through which the drift pin or bolt passes in the wood structure material. An object of the present invention is to provide a joining structure of a wooden structure material that can increase the penetration strength, which is the local compressive strength of the structural material, and as a result, can realize an efficient and economical structural design.

As means for solving the problems of the background art, the joining structure of the wood structure material according to the invention described in claim 1 is inserted into a slit formed in the material axis direction of the wood structure material, and the wood structure material and A wood structure joining structure joined via a joining plate joined by drift pins or bolts,
In order to increase the penetration strength of the wooden structure material with respect to the drift pin or bolt, a reinforcing material made of high-strength wood is provided and reinforced at the periphery of the hole through which the drift pin or bolt passes in the wooden structure material. And

  The invention described in claim 2 is the joined structure of the wood structure material according to the invention described in claim 1, wherein the outer diameter of the reinforcing material made of high-strength wood is 2 to 2 of the outer diameter of the drift pin or bolt. It is characterized by being formed about 3 times.

According to the joining structure of the wood structure material according to the present invention, the following effects are obtained.
Since the hole peripheral portion of the hole through which the drift pin or bolt passes in the wooden structure material is reinforced with a reinforcing material made of high-strength wood of the same quality as the wooden structure material, the structure is not designed as a cross-sectional defect, The penetration strength, which is the local compressive strength of the wooden structure material with respect to the drift pin or the bolt, can be effectively increased.
As a result, an efficient and economical structural design can be realized, and the face materials such as braces and seismic walls that have been installed to ensure the rigidity of the entire frame can be saved. Is.
Also, as shown in FIGS. 4 and 5, since the drift pin or bolt can be embedded in the joint portion, the design aesthetics unique to the wooden structure material and the joint portion ensuring the texture can be realized. .

  The joint structure of the wood structure material according to the present invention is a hole peripheral portion of the hole through which the drift pin or bolt is passed in the wood structure material in order to increase the penetration strength which is the local compressive strength of the wood structure material to the drift pin or bolt. Is based on the technical idea of reinforcing with a reinforcing material made of high-strength wood of the same quality as the wooden structural material. Embodiments will be described below with reference to the drawings.

  As shown in FIGS. 1 to 3, the joining structure of the wood structure material according to claim 1 is inserted into the slit 4 formed in the material axis direction of the wood structure material 2, and the wood structure material 2 and the drift pin 7. A wood structure material joining structure joined via a joining plate 3 joined by (or bolts), wherein the wood structure material 2 is enhanced so as to increase the penetration strength of the wood structure material 2 with respect to the drift pin 7 (or bolt). Reinforcing material 8 made of high-strength wood is provided at the periphery of the hole 6 through which the drift pin 7 (or bolt) in the structural material 2 is passed (invention according to claim 1).

In the present embodiment, the joining plate 3 and the wooden structure material 2 are joined by the drift pin 7. In this embodiment, in consideration of economy, a commercially available drift pin 7 having an outer diameter of about 12 to 20 mm is preferably used. In addition, as shown in FIG. 5 etc., it can implement also with the volt | bolt 10 instead of the drift pin 7, but this is mentioned later.
Further, the joining plate 3 is provided so as to protrude toward the joining member 1 to be joined to the wood structure material 2. Here, the joining member 1 is implemented with the pillar 1 in this embodiment, but is not limited thereto, and can be similarly implemented with a beam or a truss. Moreover, although the joining member 1 which concerns on a present Example is implemented with wooden construction (woody structure material), it is not limited to this, Reinforced concrete construction, steel reinforced concrete construction, or steel construction may be sufficient. In short, the present invention can be implemented regardless of the frame type of the joining member 1 or the like.

The reinforcing material 8 made of high-strength wood is formed in a cylindrical shape having a through-hole 6 having the same shape and the same size as the outer diameter of the drift pin 7. Therefore, the wooden structure material 2 is provided with a cylindrical hole 2a in which the reinforcing material 8 formed into the cylindrical shape can be closely filled. An adhesive may be used as necessary when filling (inserting) the reinforcing material 8 into the hole 2a.
In addition, the magnitude | size of the said reinforcing material 8 made from a high intensity | strength timber, the number to be used, and arrangement | positioning are not limited to the example of illustration of course, and it can change suitably according to the structural design concerning a junction part. Further, the reinforcing material 8 made of high-strength wood according to the present embodiment is formed in a cylindrical shape having a through-hole 6 through which the drift pin 7 is passed in advance, but is not limited thereto, and is formed into a cylindrical shape. Then, after filling the hole 2a of the wooden structure material 2 and integrating them, it may be carried out by a method of drilling the through hole 6 through which the drift pin 7 is passed on site. Furthermore, the hole 6 formed in the reinforcing material 8 made of high-strength wood does not necessarily have to penetrate (see the reinforcing material 18 made of high-strength wood according to FIG. 4 as an example). This will be described in Example 2.

The reinforcing material 8 made of high-strength wood is generally formed by a lathe process, and both the outer diameter and the height dimension are less than 100 mm, so that it can be manufactured very easily and economically. Incidentally, the reinforcing material 8 made of high-strength wood according to the illustrated example has a diameter of the through hole 6 (an outer diameter of the drift pin 7) of 20 mm and an outer diameter of 60 mm.
Of course, the outer diameter (size) of the reinforcing material 8 made of high-strength wood is not limited to this, and the outer diameter (about 12 to 20 mm) of the drift pin 7 is about 2 to 3 times. Preferred (invention of claim 2). Thus, the purpose of limiting the range to some extent is preferably at least twice the outer diameter of the drift pin 7 in order to increase the penetration strength of the wooden structure material 2 with respect to the drift pin 7 which is the main object of the present invention, Further, it is because it is considered uneconomical to increase the outer diameter of the reinforcing material 8 made of high-strength wood more than necessary (about three times).

Incidentally, the bending strength of the wood structure material 2 according to the present embodiment is about 25 to 35 N / mm ² , and the bending strength of the reinforcing material 8 made of high strength wood is about 50 to 85 N / mm ² . Further, the wood structure material 2 is preferably wood used in general wooden construction such as cedar, rice pine, karamatsu, and asunaro, and the high-strength wood reinforcing material 8 is made of natural bamboo, south-seawood, Natural Jara, Ipe, urine, or compressed wood is preferably used.

In general, a steel plate is preferably used as the joining plate 3, but any material can be used as long as the joining plate 3 has a necessary rigidity.
The joining plate 3 may be provided by being joined to the inside of the joining member (column) 1 by a joining means such as a bolt or welding, or may be provided by penetrating (crossing) the joining member 1. For example, when the joining member 1 is implemented by a steel structure or a steel reinforced concrete structure, the joining plate 3 is joined and attached to the steel frame by joining such as bolts or welding.
As shown in FIGS. 1 and 3, the joining plate 3 is made slightly smaller than the wood structure material 2 to be joined as shown in FIGS. 1 and 3, but is not limited thereto. In some cases, it may be carried out with the structure material 2 being equal, or in some cases, larger than the wood structure material 2.
In addition, although illustration is abbreviate | omitted, in order to make the fault of the said joining plate 3 smaller than the fault of the wooden structure material 2 like a present Example, in order to be flush with the upper surface and lower surface of the wooden structure material 2, A device on the design appearance such as placing buried trees above and below the joining plate 3 is appropriately performed.
Of course, the projecting length of the joining plate 3 is appropriately changed in accordance with the structural design.

Although the wooden structure material 2 according to the present embodiment uses laminated wood, it can be similarly applied to lumbering or a single plate laminated material (LVL).
The slit 4 provided in the wood structure material 2 has a width substantially the same as the thickness of the joining plate 3 and a depth dimension substantially equal to the protruding dimension of the joining plate 3 so that the joining plate 3 can be inserted. The wood structure material 2 is cut and provided so as to penetrate in the vertical direction. The shape of the slit 4 is not limited to this, and the design can be appropriately changed according to the shape of the joining plate 3 to be used.

The joint plate 3 and the wood structure material 2 (reinforcing material 8 made of high-strength wood) are substantially the same shape and the same size as the joint ends of the joint member 1 and the wood structure material 2 abut each other. Through holes 5 and 6 are provided. In short, the through-holes 5 and 6 according to the present invention, the reinforcing member 8 made of high-strength wood, and the hole 2a provided in the wooden structure material 2 are provided in a concentric arrangement in which the centers coincide with each other. It is.
Incidentally, the through-holes 5 and 6 according to the illustrated example are provided in a balanced manner by three in the upper and lower rows. Of course, the arrangement and the number of the through holes 5 and 6 are not limited to this, and the design can be appropriately changed according to the shape of the joining plate 3 to be used or the structural design of the joining portion.

Thus, in the joining structure of the wooden structure material 2 according to the first embodiment, the joining plate 3 protruding from the joining member (column) 1 is filled with the reinforcing material 8 made of high-strength wood and integrated. Are inserted into the slit 4 and the joint ends of the pillar 1 and the wooden structure material 2 are brought into contact with each other to be opposed to each other, and then the through holes 5 and 6 provided in the joining plate 3 and the wooden structure material 2 are made to coincide with each other. Then, it is constructed in the procedure of fitting the drift pin 7 into the corresponding through holes 5 and 6.
Note that the joining end portions of the joining member 1 and the wood structure material 2 do not necessarily have to be in contact with each other as in the illustrated example, and may be implemented with a slight gap.

Therefore, according to the joining structure of the wood structure material 2 according to the first embodiment, the hole peripheral portion of the hole 6 through which the drift pin 7 is passed in the wood structure material 2 is made of a high-strength wood reinforcing material of the same quality as the wood structure material 2. Therefore, the structure is not designed as a cross-sectional defect, and the penetration strength, which is the local compressive strength of the wooden structure material 2 with respect to the drift pin 7, can be effectively increased.
As a result, an efficient and economical structural design can be realized, and the face materials such as braces and seismic walls that have been installed to ensure the rigidity of the entire frame can be saved. Is.
Further, the reinforcing material 8 made of high-strength wood can be easily formed by a general lathe process, and both the outer diameter and the height dimension are less than 100 mm, so that it is very economical.
Furthermore, since the reinforcing material 8 made of high-strength wood can be smoothly integrated by being closely fitted into the hole 2a provided in the wooden structure material 2, the workability is also excellent.

  In addition, the method of joining the said wooden structure material 2 and the joining plate 3 with joining members, such as the drift pin 7, is not restricted to above-mentioned Example 1, There are various variations as described below. Incidentally, the structural members described in the first embodiment, such as the wooden structure material 2, the bonding member 1, and the bonding plate 3, are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

FIG. 4 shows an embodiment in which a drift pin used as a joining member between the wood structure material 2 and the joining plate 3 is embedded in the wood structure material 2 so that it cannot be seen from the outside.
The drift pin 17 according to the illustrated example is shorter than the drift pin 7 according to the first embodiment. Reference numeral 18 in the drawing indicates a cylindrical reinforcing material made of high-strength wood having a bottom surface against which the tip of the drift pin 17 inserted from one side abuts. Reference numeral 9 in the figure indicates a buried tree that covers the base end side of the drift pin 17.
Therefore, according to the joint structure of the wooden structure material 2 according to the second embodiment, in addition to the function and effect according to the first embodiment (see paragraph [0022]), the design aesthetics and texture unique to the wooden structure material There is an advantage that can be carried out with ensuring

FIG. 5 shows an embodiment in which a bolt is used in place of the drift pin used as a joining member between the wood structure material 2 and the joining plate 3.
The bolt 10 according to the illustrated example is implemented with the same length as the drift pin 17 according to the second embodiment. Reference numeral 14 in the figure denotes a cylindrical reinforcing material made of high-strength wood, and the inner wall surface of the through-hole penetrating the inside thereof is formed in a step shape capable of hooking the head of the bolt 10 and the nut 11. Formed and implemented. Reference numeral 12 in the figure denotes a buried tree that covers the bolt 10 and the nut 11.
Therefore, according to the joint structure of the wood structure material 2 according to the second embodiment, in addition to the function and effect according to the first embodiment (see paragraph [0022]), as in the second embodiment, the wooden structure material. There is an advantage that it can be carried out while ensuring a unique design aesthetics and texture.
Of course, as shown in FIG. 6, the bolt 20 and the nut 21 may be exposed.

7 and 8 show variations of the joining means between the wooden structure material 2 and the joining plate 3.
In this Example 4, the joining plates 3 protruding from the joining members (columns) 1 are respectively applied to both side surfaces of the wood structure material 2 that has not been processed with the slits 4, and the two joining plates 3 and the wood structure material 2 Are joined by the drift pin 16 or the bolt 30 and the nut 31 using the through hole provided in
The joining structure of the wood structure material 2 according to the fourth embodiment also has the same effects as the operational effects according to the first embodiment (see paragraph [0022]).

  The embodiments have been described with reference to the drawings. However, the present invention is not limited to the illustrated embodiments, and design modifications and application variations that are usually made by those skilled in the art are within the scope of the technical idea of the invention. Note that it includes the range.

It is the front view which showed the principal part of the joining structure of the wooden structure material which concerns on Example 1. FIG. FIG. 2 is a plan sectional view of FIG. 1. FIG. 2 is a cross-sectional view taken along line XX in FIG. 1. It is the plane sectional view which showed the principal part of the joining structure of the wooden structure material which concerns on Example 2. FIG. It is the plane sectional view which showed the principal part of the joining structure of the wooden structure material which concerns on Example 3. FIG. It is the plane sectional view which showed the Example from which the joining structure of the wooden structure material which concerns on Example 3 differs. It is the plane sectional view which showed the principal part of the joining structure of the wooden structure material which concerns on Example 4. FIG. It is the plane sectional view which showed the principal part of the joining structure of the wooden structure material which concerns on Example 4. FIG.

Explanation of symbols

1 Joining member (pillar)
2 Wood structure material 2a Hole 3, 13 Joint plate 4 Slit 5 Through hole 6 Through hole 7, 16, 17 Drift pin 8, 14, 15, 18 Reinforcing material made of high-strength wood 9, 12 Filled wood 10, 20, 30 Bolt 11, 21, 31 Nut

Claims (2)

It is inserted into a slit formed in the direction of the axis of the wood structure material, and is a joining structure of the wood structure material joined via a joining plate joined with the wood structure material with a drift pin or a bolt,
In order to increase the penetration strength of the wooden structure material with respect to the drift pin or bolt, a reinforcing material made of high-strength wood is provided and reinforced at the periphery of the hole through which the drift pin or bolt passes in the wooden structure material. A wood structure joint structure.   The outer structure of the reinforcing material made of high-strength wood is formed to have an outer diameter of about 2 to 3 times the outer diameter of the drift pin or bolt. .

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