JPH1088666A - Joining method for woody material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a Joining method, in which the generation of the shear fracture of a woody material as a base material is prevented while separation generated on the interface of a grout material and the woody material is reduced and which can resist the extraction load of a joining member effectively when the woody material is joined through the joining member. SOLUTION: In the joining method of a woody material, the woody material 1 is divided into split pieces 10, recessed grooves are excavated to these split surfaces 10a while deformed steel pipes 5 having a shape engaged with the irregularities of the recessed grooves are disposed into the recessed grooves while the split pieces 10 are laminated. The insides of the deformed steel pipes 5 are filled with a filling solidifying agent and the agent is solidified, reinforcing bars 4 inserted into the deformed steel pipes 5 are fixed, and the woody material 1 is joined with other members through the reinforcing bars 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of joining a woody material such as laminated wood to another member via a reinforcing bar, a bolt, a metal fitting or other joining members.

[0002]

2. Description of the Related Art Conventionally, as a wooden structural material of a wooden building, a wooden material such as laminated wood called engineering wood has been used. The laminated lumber is glued and laminated with small square wood called lamina so that the fiber direction is parallel, or LVL made by bonding single veneers in multiple layers
Etc.

[0003] As one example of the joining method of the wood material, as shown in FIG.
A BVD hanger 51 made of a hollow steel pipe is embedded therein, a connection fitting 53 is fixed to the BVD hanger 51 with a bolt 52, and the wood material 50 is joined to another member via the connection fitting 53. is there.

The working procedure of this method will be described in detail.
As shown in FIG. 9A, an insertion hole 54 for embedding the BVD hanger 51 is formed in the joint surface 50a of the wood material 50, and a pin hole 55 reaching the insertion hole 54 from the side surface 50b of the wood material 50. Drilling. This pin hole 55
In the figure, a drift pin 56 for fixing the BVD hanger 51 inserted into the insertion hole 54 is driven, and the driven drift pin 56 is attached to the BVD hanger 51 inserted into the insertion hole 54. Recess 5 formed on the surface
1a. In addition, this insertion hole 5
Along with the drilling of the pin holes 4 and the pin holes 55, an injection hole 57 communicating from the side surface of the wood material into the insertion hole 54 is formed.

When the operation of forming the insertion hole 54 and the pin hole 55 is completed, as shown in FIG.
4 and the BVD hanger 51 are inserted into the
The BVD hanger 51 is fixed by driving the drift pin 56 into 5. Thereafter, as shown in FIG.
A grouting agent such as an epoxy resin is injected through 7 and solidified to fix the BVD hanger 51 in the insertion hole 54.

Then, a joining member such as a bolt is inserted into the BVD hanger 51, and the BVD hanger 5
1 is filled with a grouting agent so that
It is fixed inside the VD hanger 51, and the wood material 50 is joined through this joining member.

In such a method of joining wood materials, when a load is applied to the joint portion to pull out the joining member such as the bolt 52, the load is applied from the joining member to the BVD hanger 51 via the grout agent. The BVD hanger 5 is transferred and joined with the drift pin 56 and the grout agent.
1 and the wood material 50 can be resisted by the adhesive force, and the joining member can be prevented from being pulled out.

[0008]

However, as described above, in the method of joining wood materials using the BVD hanger, the strength of the members of the BVD hanger 51 and the drift pin 56, and the BVD hanger 51 and the grout agent Is higher than the strength of the base material, that is, the material of the wooden material 50, and when a load is applied to pull out the BVD hanger 51 at the joint, a shear force is generated between the grout agent and the base material. Before the BVD hanger peels off from the grout, there is a problem that the base material undergoes shear failure.

Further, there is a problem that the adhesion strength between the BVD hanger 51 and the base material is reduced due to thinning of the grout agent, that is, drying shrinkage or the like, and peeling is likely to occur at the interface between the grout agent and the base material.

[0010] The present invention has been made in view of the above-described problems, and when a wood material is joined via a joining member, it is possible to prevent the wood material as a base material from causing shear failure. It is an object of the present invention to provide a method for joining wood materials which can reduce peeling generated at the interface between the grout agent and the wood material and can effectively resist a load for pulling out the joining member.

[0011]

According to the present invention, there is provided a method for joining a wood material, comprising inserting a joining member into an insertion hole formed in the wood material, and joining the wood material via the joining member. Forming irregularities on the inner hole wall surface of the insertion hole, filling the insertion hole with a filling and solidifying agent, and solidifying the solidifying member, thereby fixing the joining member inserted into the insertion hole (claim 1). .

In such a method for joining wood materials, the joining member is fixed in the insertion hole with a filling and solidifying agent, and the wood material is joined to another member via the fixing member. At this time, since the inner hole wall surface of the insertion hole is formed with irregularities, even if a load is applied to pull out the joining member, the load is decomposed and diffused in multiple directions by the irregularities, and the filling solidifying agent and the mother material are mixed. It is possible to reduce the intensive shear force acting in one direction between the material, that is, the wood material. Further, by forming irregularities on the inner hole wall surface, it is possible to increase the adhesion area between the solidified filling and solidifying agent and the inner wall surface of the insertion hole.

Further, the method for joining woody materials according to the present invention comprises:
A method of inserting a joining member into an insertion hole formed in a wood material and joining the wood material through the joining member,
Irregularities are formed on the inner hole wall surface of the insertion hole, and an anchor member having a shape engaging with the irregularities and having a solid inside is buried in the insertion hole, and the anchor member is joined at the joining surface of the woody material. A connecting hole is formed by cutting, and after the joining member is inserted into the connecting hole, a filling solidifying agent is filled in the connecting hole and solidified to fix the joining member (claim 2). .

[0014] In such a method of joining wood materials, a connection hole is formed in an anchor member embedded in the insertion hole, and the connection member is fixed to the connection hole with a filling solidifying agent.
The wood material is joined to other members. At this time, since the anchor member has a shape that engages with the irregularities formed on the inner hole wall surface of the insertion hole, even if a load is applied to pull out the joining member, the reaction force against the force is reduced. ,
It can be obtained from the wood material side by engaging with unevenness,
It is possible to resist such a load. The connection hole is
Since the anchor member is formed by embedding the anchor member in the insertion hole and then cutting the anchor member, the positioning of the insertion hole at the site becomes easy.

Further, in the above-mentioned method for joining woody materials, it is preferable that the anchor member is formed of a high-strength fiber member. In such a method for joining woody materials, the work of cutting the connection holes can be facilitated, and when a filling and solidifying agent is injected into the connection holes, it is impregnated into the high-strength fiber member, and the woody material is mixed. Can increase the adhesion strength.

Further, in the method for joining wood materials, the insertion hole divides the wood material,
It is preferable to form the groove by cutting a surface to be divided of these divided pieces, and to bond the divided pieces together (claim 4).

In such a method for joining wood materials, a wood material is divided and an insertion hole is formed in advance on the divided surface, so that the insertion hole having a complicated shape can be easily formed only by bonding the divided pieces. Can be formed.

In the above method for joining wood materials, a deformed steel pipe having a shape engaging with the unevenness of the concave groove is provided in the concave groove formed on the divided surface of the divided piece. (Claim 5). In such a method of joining wood materials, since the deformed steel pipe is disposed in the insertion hole,
The inner wall surface of the insertion hole can be reinforced, and the shear fracture of the base material can be more effectively reduced.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 or FIG. 2 is an explanatory diagram of a method for joining wood materials according to the first embodiment of the present invention. In the present embodiment, the wood material 1 is a laminated lumber called an engineering wood such as a laminated wood or an LVL. Then, the wood material 1 is inserted into a deformed steel pipe 5 embedded in the wood material 1 and a reinforcing bar 4 as a joining member.
Is inserted and fixed, and joined to other members via the reinforcing bar 4. This joining operation is performed according to the following procedure.

First, as shown in FIG. 1, an insertion hole 2 having irregularities on the inner hole wall surface is formed in a wooden material 1.
In the present embodiment, in the present embodiment, the diameter of the hole is increased in the middle part thereof from the diameter in the vicinity of the opening to form the widened portion 2a, and the diameter of the hole is reduced at both ends of the middle part so as to be constricted. 2b are formed, and have a pot shape as a whole.

In the present embodiment, the insertion hole 2 divides the wooden material 1 into a pair of upper and lower divided pieces 10, and forms a widened portion 2 on each divided surface 10 a of these divided pieces 10.
a and a concave groove having a constricted portion 2b are formed by cutting.
It is formed by laminating the 0 divisional surfaces 10a.

In the present embodiment, when the divided pieces 10 are bonded to each other, the deformed steel pipe 5 having a shape to engage with the concave and convex of the concave groove is inserted between the divided pieces 10 and 10 so that the insertion hole 2 is formed. To be installed in The deformed steel pipe 5 has a pot shape that matches the shape of the insertion hole 2, and may be made of steel or stainless steel. When disposing the deformed steel pipe 5 in the insertion hole 2, the deformed steel pipe 5 and the insertion hole 2
An adhesive is applied to the outer surface of the deformed steel pipe 5 so that no gap is formed between the pipes.

After the operation of bonding the divided pieces 10 is completed, the reinforcing steel 4 as a joining member is then placed in the deformed steel pipe 5.
Is inserted, and a grouting agent as a filling and solidifying agent is injected into the deformed steel pipe 5 to be solidified, and the reinforcing bar 4 is fixed in the insertion hole 2. As the grouting agent, for example, an epoxy resin or a non-shrinkage type cement grouting agent can be used.

Thereafter, the reinforcing bar 4 fixed to the deformed steel pipe 5
Is fixed to another member by the same procedure as above, whereby the wood material 1 is joined to the other member. In the method of joining wood materials according to such a work procedure, a reinforcing bar 4
Even if a load is applied to pull out the hole, since the insertion hole 2 has a pot-shaped cross-sectional shape, the load can be decomposed by the unevenness.

That is, as shown in FIG. 2, when a load P for pulling out the reinforcing bar 4 is applied, the load P is applied as an adhesive force f generated on the outer peripheral surface of the reinforcing bar 4 through the solidified grouting agent G. It is transmitted to the steel pipe 5. This adhesive force f
Is decomposed into a shearing force τ acting in a direction along the hole wall surface and a compressive force σ pressing the hole wall surface vertically between the outer surface of the deformed steel pipe 5 and the hole wall surface of the insertion hole 2. Since the direction of action of the shearing force τ is diffused in multiple directions depending on the shape of the wall surface of the insertion hole 2, the shearing force does not act intensively in one direction, and the interface between the wood material 1 and the grouting agent G is not increased. In this case, the shear failure of the wooden material can be prevented.

In the present embodiment, the deformed steel pipe 5 is provided in the insertion hole 2, but the present invention is not limited to this, and the deformed steel pipe 5 is omitted as shown in FIG. Alternatively, the grout agent can be filled directly into the insertion hole 2. In this case, the insertion hole 2 is formed in this embodiment.
It is not necessary to form the wood material 1 by dividing it, but it can be formed by hollowing out the wood material 1 from the opening 3 using a drill or the like.

Next, a second embodiment of the method for joining wood materials according to the present invention will be described with reference to FIG. The gist of the present embodiment is that an insertion hole 32 having irregularities on the inner hole wall surface is formed in the joint surface 30a of the divided piece 30 of the wooden material 31, and a shape matching the shape of the insertion hole 32 is formed in the insertion hole 32. And embedding an anchor member having the same.

The anchor member is a solid member having a shape that engages with irregularities formed on the wall surface of the inner hole of the insertion hole 32, and is made of various materials as long as it can be cut. Can be used. In the present embodiment, as the anchor member, a fiber reinforcing rod 35 whose surface is formed with irregularities by twisting high-strength fiber members such as carbon fiber, glass fiber, and aramid fiber is used. That is, in the present embodiment, as shown in FIG. 4A, a high-strength fiber is formed into a spiral having a solid inside by twisting or knitting, and this is impregnated with a grout agent. Use the solidified material.

In order to embed the fiber reinforcing rod 35 in the insertion hole 2, the unevenness of the fiber reinforcing rod 35 engages with the unevenness of the concave groove 32 formed on the joint surface 30 a of the divided piece 30. Then, after the concave groove 32 and the fiber reinforcing rod 35 are arranged so as to match each other, a pair of divided pieces 30 are bonded so as to sandwich the groove. At this time, the fiber reinforced rod 3
An adhesive is applied to the outer surface of the fiber reinforced rod 35 so that no gap is formed between the fiber reinforcement rod 35 and the insertion hole 32.

Thereafter, as shown in FIG.
3, the end face of the fiber reinforcing rod 35 is cut by a cutting drill or the like to form a connection hole 36 extending in the axial direction of the end face. This connection hole 36 has a diameter substantially equal to the diameter of the reinforcing bar 4. Next, after the rebar 4 is inserted into the connection hole 36, a grouting agent is injected into the connection hole 36 and solidified to fix the rebar 4.

According to the joining method of the woody material in such a procedure, the connection hole 36 is inserted into the insertion hole 32 by the fiber reinforced rod 3.
5 is formed after the wood material 1 is buried, so that the connection hole 36 can be positioned at the site when the wood material 1 is erected, so that the workability at the time of joining the wood material 1 is improved. In particular, in this embodiment, since the fiber reinforced rod 35 is used as the anchor member, the operation of cutting the connection hole 36 can be made easy, and the connection hole 36 can be easily cut.
When the filling and solidifying agent is injected into the fiber material, this impregnates the fiber reinforcing rod 35 and can increase the adhesion strength to the wood material 31.

In the second embodiment, the wooden material 30 is divided, a concave groove is formed on the divided surface, and the fiber reinforcing rod 35 is inserted between the grooves. Although 35 is provided, the present invention is not limited to this. The insertion hole 32 is formed in advance, and the fiber reinforcing rod 35 can be inserted through the opening 33. At this time, it is preferable that the shape of the insertion hole 32 be helical so that the fiber is twisted so that the fiber reinforcing rod 35 formed in a helical shape can be screwed.

Further, a third embodiment of the method for joining woody materials according to the present invention will be described with reference to FIGS. In the present embodiment, as shown in FIG. 5, the insertion holes 42 formed in the same or the same solid wood material 41 are appropriately spaced along the length direction as shown in FIG. A large number of annular widened portions 42a are formed with an inner diameter larger than the inner diameter of the hole 42, and irregularities are formed by the annular widened portion 42a and the inner hole wall surface of the insertion hole 42.

As shown in FIG. 7, a circular cutting blade 43a having an outer diameter capable of being inserted into the insertion hole 42 is formed by concentric O1 with the cutting blade 43a.
A cutting tool 43 provided on a shaft 43b having a smaller shaft diameter than the cutting blade 43a is used.

When forming the annular widened portion 42a, the cutting tool 43 was inserted into the insertion hole 42, and the cutting blade 43a positioned at the position where the widened portion 42a was formed was exposed to the outside of the insertion hole 42. It is rotationally driven via the shaft 43b. When the cutting instrument 43 is inserted into the insertion hole 42, the axis O of the cutting blade 43a and the shaft body 43b with respect to the axis O of the insertion hole 42.
Numeral 1 is substantially concentric. When performing cutting, the shaft 43b of the cutting instrument 43 is displaced from the axis O of the insertion hole 42, and is moved radially outward. Thus, the cutting blade 43a cuts only the corresponding portion of the inner hole wall surface of the insertion hole 42 where the cutting blade 43a is located. Then, it is possible to form the widened portion 42a having the inner radius corresponding to the amount by which the shaft 43b is moved radially outward with respect to the axis O of the insertion hole 42. By performing this operation over the entire inner wall surface of the insertion hole 42, an annular widened portion 42 a having an inner diameter larger than the inner diameter of the insertion hole 42 can be formed inside the insertion hole 42 of the wood material 41.

By repeating this operation at appropriate intervals in the length direction of the insertion hole 42, a desired number of annular widened portions 42a, and consequently, irregularities can be formed inside the insertion hole 42. At this time, considering that a large number of widened portions 42a are formed in the length direction of the insertion hole 42, the shaft 43b
A plurality of cutting blades 4 are provided at appropriate intervals along the axial direction.
It is convenient to attach 3a.

Thus, the insertion hole 42 having the unevenness as shown in FIG. 5 is formed. Then, as shown in FIG. 6, when joining the pair of wood materials 41 to each other, the wood members 41 are joined to each other by spanning between these insertion holes 42 and inserting the joining member in the same manner as described above. I do. In this embodiment, a rod member 44 having a full thread is used as a joining member, and the rod member 44 is inserted into the insertion hole 42 filled with a filling and solidifying agent such as an epoxy resin as described above.

As a result, the same function and effect as those of the above embodiment can be obtained, and the required fixing length, that is, the length of the insertion hole 42 and the length of the rod body 44 can be reduced by improving the fixing performance due to the unevenness. It is possible to make the installation simpler and more reliable than in the case where a long fixing length must be ensured.

[0039]

As described in detail above, in the method for joining woody materials according to the present invention, even if a load for pulling out the joining member acts on the joining portion, irregularities are formed on the inner wall surface of the insertion hole. Since it is formed, the load can be decomposed and diffused in multiple directions by the unevenness, and it is possible to reduce the intensive shear force acting in one direction between the filling solidifying agent and the wood material. be able to. Further, by forming the irregularities, it is possible to increase the adhesion area between the solidified filling solidifying agent and the inner wall surface of the insertion hole. As a result of these,
It is possible to prevent the wood material as the base material from causing shear failure, reduce the peeling that occurs at the interface between the grout agent and the wood material, and effectively resist the load trying to pull out the joining member. it can.

Further, in the method for joining woody materials according to the present invention, since the anchor member is shaped to engage with the irregularities formed on the inner hole wall surface of the insertion hole, the load for pulling out the joining member is limited. Even when it acts, a reaction force to this load can be obtained from the wood material side by engagement with the unevenness, and the load can be resisted. In particular, since the connection hole is formed by embedding the anchor member in the insertion hole and then cutting the anchor member, it is easy to position the connection hole on site.

In the method of joining wood materials, the anchor member is formed of a high-strength fiber member, thereby facilitating the work of cutting the connection hole and filling the connection hole. When injecting the solidifying agent,
This impregnates the high-strength fiber member and can increase the bonding strength with the woody material.

Further, in the above-mentioned method for joining wood materials, the insertion hole is formed by bonding a cut groove to the surface to be divided of the divided pieces. Thus, an insertion hole having a complicated shape can be easily formed.

In the above-mentioned method for joining wood materials, a deformed steel pipe having a shape engaging with the unevenness of the groove is provided in the groove formed on the divided surface of the divided piece. ,
Since the deformed steel pipe is disposed in the insertion hole, the inner wall surface of the insertion hole can be reinforced, and the shear fracture of the base material can be more effectively reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an operation procedure of a method for joining wood materials according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the wood material joined by the wood material joining method according to the first embodiment.

FIG. 3 is an explanatory view showing a modification of the method for joining wood materials according to the first embodiment of the present invention.

FIG. 4 is an explanatory view showing a method for joining wood materials according to a second embodiment of the present invention, and (a) and (b) are perspective views showing the operation procedure.

FIG. 5 is a cross-sectional view of a wood material used in a method for joining wood materials according to a third embodiment of the present invention.

FIG. 6 is a sectional view of a wood material joined by a wood material joining method according to a third embodiment of the present invention.

FIG. 7 is an explanatory diagram for explaining a state of producing the woody material shown in FIG. 5;

FIG. 8 is a perspective view showing a conventional method of joining woody materials.

FIGS. 9A to 9C are explanatory views showing a conventional method of joining woody materials, and FIGS. 9A to 9C are perspective views showing the operation procedure.

[Explanation of symbols]

 1,31,41 Wood material 2,32,42 Insertion hole 3,33 Opening 4 Reinforcing bar (joining member) 5 Deformed steel pipe 35 Fiber reinforced rod (anchor member) 36 Connection hole 10,30 Split piece 44 Rod body

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akira Furuya 2-3-3 Kandajicho, Chiyoda-ku, Tokyo Co., Ltd. Obayashi Corporation Tokyo Head Office (72) Inventor Tsuneo Yamaguchi 4-640, Shimoseito, Kiyose-shi, Tokyo Stock Company Obayashi Engineering Laboratory (72) Inventor Nagao Hori 4-640 Shimoseito, Kiyose-shi, Tokyo Inside Obayashi Engineering Laboratory

Claims (5)

[Claims] 1. A method of inserting a joining member into an insertion hole formed in a wood material and joining the wood material via the joining member, wherein irregularities are formed on a wall surface of an inner hole of the insertion hole. A method for joining wood materials, comprising filling and solidifying a filling solidifying agent in the insertion hole, and fixing the joining member inserted in the insertion hole. 2. A method of inserting a joining member into an insertion hole formed in a wood material and joining the wood material through the joining member, wherein irregularities are formed on an inner hole wall surface of the insertion hole. In this insertion hole, an anchor member having a shape engaging with the irregularities and having a solid inside is buried, and the anchor member is cut at a joining surface of the woody material to form a connection hole. A method for joining wood materials, comprising: inserting the joining member into a hole; and filling and solidifying a filling solidifying agent into the connection hole to fix the joining member. 3. The method according to claim 2, wherein the anchor member is formed of a high-strength fiber member. 4. The insertion hole is formed by dividing the woody material, cutting a divisional surface of the divided pieces to form a concave groove, and attaching the divided pieces together. The method for joining woody materials according to claim 1, wherein: 5. The deformed steel pipe having a shape that engages with the unevenness of the groove is provided in the groove formed on the divided surface of the divided piece. Wood material joining method.