JP2016191274A - Joint structure for wooden member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint structure for a wooden member that may enhance strength of a joint of a wooden member that uses a joint metal, by suppressing destruction of the joint.SOLUTION: A joint structure is used with a joint between structural members or between a structural member and a non-structural member of a building, and includes: a rod-form joint metal inserted into a hole or a groove formed in a longer-side direction of a rod-form or plate-form wooden member from an end of the wooden member; a shear key having an end fitted into a hole formed at the center of an edge surface of the wooden member and the other end fitted into a hole formed on an opposite member, while the edge surface of the wooden member is abutted to the opposite member; and an adhesive filled in the hole or the groove into which the joint metal has been inserted. A rod-form part has a constricted part narrower than surrounding parts at a place located at an end of the wooden member. A plurality of joint metals are provided on the joint at symmetrical positions around the shear key at the center, for joining the wooden member with the opposite member leaving a gap in between.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a joining structure for wooden members.

  Conventionally, a joining method using a wooden structure or a joining method using a combination of a plurality of joining hardware such as a plate and a drift pin has been used for a joint portion of a wooden structure. Also, in recent years, instead of the complicated conventional joining method that requires a large number of metal parts, a joining method that forms a groove in a wooden member and embeds a bar-shaped member such as a deformed steel bar to fill and solidify the adhesive. Has been proposed (see, for example, Patent Documents 1-3). When a bar-shaped member such as deformed steel bar is embedded in a wooden member, the bonding strength is increased and the metal is not exposed, so that corrosion of the metal can be avoided, and the metal can also become a heat bridge and cause condensation. It can also be suppressed.

Japanese Patent No. 3370937 JP 2004-360458 A JP 2003-193570 A

  When joint metal such as deformed steel bars is embedded in a wooden member and used for joining wooden members, the strength of the joint hardware is generally superior to that of wooden members. There was a possibility of causing destruction.

  Then, this application makes it a subject to provide the joining structure of the wooden member which improves the intensity | strength of a joining part by suppressing destruction of the joining part of the wooden member using a joining metal fitting.

  In order to solve the above-described problems, in the present invention, a shear key is provided at the center of the end face of the wooden member, and a joint hardware having a narrower portion than the periphery at a position located at the end of the wooden member is centered on the shear key. A plurality of members are provided in the joining portion in a symmetrical positional relationship, and the wood member is joined with a gap between the wood member and the counterpart material.

  Specifically, the present invention relates to a joint structure used for a structural material of a building or a joint part between a structural material and a non-structural material, and at least one of the structural materials or the structural material and the non-structural material. A rod-shaped joint metal fitting inserted into a hole or groove dug in the longitudinal direction of the wooden member from the end of a rod-shaped or plate-shaped wooden member used as a structural material or non-structural material, and an end surface of the wooden member In a state where the mating member is abutted against the mating member, one end is fitted into the hole formed in the center of the end face of the wooden member, and the shear key is fitted into the hole of the mating member and the other end is inserted into the joint metal. An adhesive filled in a hole or a groove, and the metal fitting has a constricted portion that is narrower than the periphery at a position located at an end of the wooden member, Symmetric position around the shear key Engagement is provided a plurality to said joint part, joining said wooden member and the mating member in a state in which a gap, which is junction structure of wooden members.

Here, the symmetrical positional relationship means that when the building is shaken, the constricted portions of the joint hardware arranged with the shear key sandwiched alternately expands and contracts so that the movement around the shear key is generated. Any positional relationship of the joint hardware may be used, and it is not necessary to have a geometrically strict positional relationship. If such a joint structure, the constricted portion of each joint hardware arranged symmetrically with a shear key in between cooperates to reduce the maximum load applied to the bonded portion between each joint hardware and the wooden member, The destruction of the entire joint portion can be suppressed.

  The metal fitting has a rough surface portion having a protrusion or a groove formed so that at least a surface in the drawing direction from the hole or groove is perpendicular to the longitudinal direction of the metal joint. It may be formed on the outer peripheral surface. If such a joint metal is used for the above joint structure, even if an axial load is applied to the joint metal, the movement of the joint metal relative to the adhesive is blocked by the standing surface, and the relative position of the joint metal relative to the adhesive is Slight movement is also suppressed. As a result, almost no breakage occurs at the interface between the bonding hardware and the adhesive. For this reason, the destruction of the interface between the bonding hardware and the adhesive is suppressed, and the strength of the bonded portion of the wooden member is improved.

  The rough surface portion may have a protrusion or a groove formed in an annular shape around the rod-shaped portion. If the projection or groove of the rough surface portion is formed in an annular shape around the rod-shaped portion, an upright surface formed perpendicular to the longitudinal direction of the joint metal is formed in an annular shape around the rod-shaped portion. Even if an axial load is applied to the metal joint, the movement of the metal joint relative to the adhesive can be sufficiently suppressed on the standing surface.

  The building may be a wooden building structure, and the joint metal may be inserted into a hole or a groove formed in each of a wooden column and a beam that are abutted at the joint portion. If it is the joining structure which joined the wooden pillar and beam which are faced | matched mutually with said joining metal fitting, a wooden pillar and a beam will be joined more firmly than before.

  Further, the building may be a wooden building structure, and the joint hardware may be inserted into a hole or a groove formed in each wooden beam that is abutted across a pillar at the joint portion. . If it is the joining structure which joined each wooden beam faced on both sides of a pillar with the above-mentioned joint metal fitting, wooden beams will be joined more firmly than before.

  If it is the junction structure of the said wooden member, the intensity | strength of a junction part can be improved by suppressing the destruction of the junction part of the wooden member using a joining metal fitting.

FIG. 1A is a perspective view illustrating an example of a metal fitting of a wooden member used in the bonding structure according to the embodiment. FIG. 1B is a front view of a metal fitting for a wooden member used in the bonding structure according to the embodiment. FIG. 2 is an example of a bonding structure according to the embodiment. FIG. 3 is an exploded view of the joint structure. FIG. 4 is a view showing the joint structure in a state where the column is inclined due to the application of horizontal force. FIG. 5 is a view showing an example of a metal fitting of a wooden member used in the bonding structure according to the modification. FIG. 6 is a view showing a joint structure according to a modification.

  Hereinafter, embodiments of the present invention will be described. Embodiment shown below is one aspect | mode of this invention, and does not limit the technical scope of this invention.

<Embodiment>
FIG. 1A is a perspective view illustrating an example of a metal fitting of a wooden member used in the bonding structure according to the embodiment. Moreover, FIG. 1B is a front view of the joining metal fitting of the wooden member used for the joining structure which concerns on embodiment. A metal fitting 1 for a wooden member used in the joining structure according to the embodiment is a hardware that can be used for joining wood pieces in a joining portion of a wooden structure, and includes a long and straight cylindrical rod-like portion 2. . Further, the bar-shaped part 2 is formed with a rough surface part 3 having a protrusion or a groove having a standing surface 3 a perpendicular to the longitudinal direction of the bar-shaped part 2 on the outer peripheral surface excluding the central part of the bar-shaped part 2. . Since the rough surface portion 3 is formed on the outer peripheral surface excluding the central portion of the rod-shaped portion 2, a flat smooth portion 4 having no protrusions and grooves on the outer peripheral surface is formed in the vicinity of the central portion of the bonding hardware 1. Has been. In addition, the metal fitting 1 is provided with a constricted portion 6 that is narrower than the surroundings at a position located at the end of the wooden member (the center portion of the metal fitting 1 shown in FIGS. 1A and 1B). As shown in FIGS. 1A and 1B, the constricted portion 6 may be formed such that a side-view rectangular groove wraps around the outer peripheral surface of the smooth portion 4, or a side-view arc-shaped groove is a smooth portion. It may be formed so as to go around the outer peripheral surface of 4. The metal joint 1 may be manufactured by casting, may be manufactured by cutting an iron round bar, or may be manufactured by cutting a node of a deformed steel bar.

  FIG. 2 is an example of a bonding structure according to the embodiment. The joint structure 10 is a structure in which structural members of a building are joined with a joint hardware 1 provided with a constricted portion 6, and a wooden beam 11 and a column 12, which are structural members of a wooden building, are joined. The joining structure 10 is a metal in which one end is fitted in the hole 11p formed in the center of the end surface of the beam 11 and the other end is fitted in the hole 12p of the column 12 in a state where the end surface of the beam 11 is abutted against the side surface of the column 12. Shear key 8 made of is provided. A plurality of metal fittings 1 applied to the joint structure 10 are provided in a joint portion between the beam 11 and the column 12 in a vertically symmetrical positional relationship with the shear key 8 as the center, and a gap is provided between the beam 11 and the column 12. Join in the state. The shear key 8 is a component for defining the relative positional relationship between the beam 11 and the column 12 to which the bonding structure 10 is bonded, and mainly plays a role of supporting a load in the shear direction at the bonded portion of the beam 11 and the column 12. It is a part that bears on. Therefore, it is preferable that the shear key 8 has a strength that can withstand a load in the shear direction, and for example, a cylindrical metal member or the like is suitable.

  FIG. 3 is an exploded view of the joining structure 10. In the joint structure 10, the joint metal 1 is inserted into the hole 11 a formed in the end surface of the beam 11 and the hole 12 a of the column 12, and the shear key 8 is inserted into the hole 11 p formed in the end surface of the beam 11 and the hole 12 p of the column 12. The end face of the beam 11 is abutted against the side face of the column 12 with a gap. Then, the adhesive 5 is filled so as to fill the protrusions or grooves of the rough surface portion 3 in the holes 11a and 12a into which the metal fittings 1 are inserted. As the adhesive 5, for example, an adhesive for construction engineering such as an epoxy resin or a mortar resin that is solidified without shrinking after filling is suitable. The adhesive 5 is filled into the hole 11a and the hole 12a through an appropriate hole (not shown) that leads to the hole 11a and the hole 12a.

FIG. 4 is a view showing the joint structure 10 in a state where the column 12 is inclined due to a horizontal force. When the building is shaken by an earthquake, a great force is applied to the joint between the column and the beam. For example, the column 12 may be inclined with respect to the beam 11 as shown in FIG. Here, if the end face of the beam 11 is joined to the joint hardware 1 in a state of being in close contact with the side surface of the column 12, if the building is shaken, the upper joint metal 1 and the lower joint 2 disposed at the upper and lower positions A great pulling load is alternately applied to the side metal fitting 1. However, a plurality of joint structures 10 are provided in the joint portion between the beam 11 and the column 12 in a symmetrical positional relationship with the shear key 8 as the center, and the beam 11 and the column 12 are joined with a gap therebetween. 4A and 4B, even if the inclination of the column 12 occurs due to an earthquake, the joint portion is deformed around the shear key 8. Therefore, in the joint structure 10 in which the joint hardware 1 is arranged symmetrically with respect to the shear key 8, when the building is shaken, when the constricted portion 6 of the upper or lower joint hardware 1 is compressed, the shear key 8 is The behavior that the constricted part 6 of the metal fitting 1 on the opposite side of the sandwiching is pulled is alternately repeated. As a result, the constricted portion 6 of the joint hardware 1 on the upper side of the shear key 8 and the constricted portion 6 of the joint hardware 1 on the lower side of the shear key 8 cooperate with each other, and each joint hardware 1 and the wooden member (beam 11 and column 12). ) And the maximum load applied to the adhesive part is reduced, and the destruction of the entire joint part is suppressed.

<Modification>
FIG. 5 is a view showing an example of a metal fitting of a wooden member used in the bonding structure according to the modification. A joining member 1 ′ of a wooden member used in the joining structure according to the modification includes a rod-like portion 2 similar to the joining member 1 of the embodiment, a rough surface portion 3 having a protrusion or groove having a standing surface 3a, a smooth portion 4, and a constriction. Although the part 6 is equipped, those positional relationships differ from the joining metal fitting 1 of embodiment. That is, the metal member 1 ′ of the wooden member used for the joint structure according to the present modification includes the rough surface portions 3 at both the ends and the center of the rod-shaped portion 2, and the smooth portion 4 between the three rough surface portions 3. And a constricted portion 6.

  FIG. 6 is a view showing a joint structure according to a modification. For example, as shown in FIG. 6, the joining structure 20 of the present modification joins wooden beams 21 with a column 22 interposed therebetween. In the joint structure 20 of this modification, the joint hardware 1 ′ is inserted into the hole 21 a formed in the end face of each beam 21 and the hole 22 a of the pillar 22, and the hole 21 p and the pillar 22 formed in the end face of each beam 21. The end face of the beam 21 is abutted against the side face of the column 22 with a gap while the shear key 8 is inserted into the hole 22p. Then, the adhesive 5 is filled so as to fill the protrusions or grooves of the rough surface portion 3 into the holes 21a and 22a into which the metal fittings 1 'are inserted.

  The joint structure 20 according to this modification is similar to the joint structure 10 of the above-described embodiment. Of the plurality of joint hardware 1 ′ arranged vertically symmetrically with respect to the shear key 8, the upper or lower joint hardware 1 ′ When the constricted portion 6 is compressed, a behavior occurs in which the constricted portion 6 of the metal fitting 1 ′ on the opposite side across the shear key 8 is pulled. Then, the constricted portion 6 of the joint metal 1 ′ above the shear key 8 and the constricted portion 6 of the joint metal 1 ′ below the shear key 8 cooperate with each other, and each joint hardware 1 ′ and the wooden member (the beams 11 and 11). The maximum load applied to the bonded portion with the column 12) is reduced, and the entire bonded portion is prevented from being broken.

  In addition, in the joining structures 10 and 20 of the above-described embodiments and modifications, the joint hardware 1 and 1 ′ including the rough surface portion 3 having the standing surface 3a perpendicular to the longitudinal direction is used. The joint structures 10 and 20 of the form and the modification are not limited to those using such a joint metal. The joint hardware used for the joint structures 10 and 20 of the above-described embodiments and modifications is not limited as long as it corresponds to the above-described constricted portion 6, and the rough surface portion 3 does not have a vertical standing surface. May be.

In addition, the assumed tensile strength of the adhesive 5 is about 10 N / mm ² , and examples of such a strength include Jolliseal JB manufactured by Aika Industry Co., Ltd., which is a reinforcing material for civil engineering construction. -3 ("Jolliseal" is a registered trademark).

10., 21..Joint structures 11, 21..Beam 11a, 12a, 21a, 22a..Hole 12, 22..Column 1, 1 '.. Joint hardware 2..Bar-like portion 3..Rough surface portion 3a .. Standing surface 3b ·· Inclined surface 4 · Smooth portion 5 · · Adhesive 6 · · Constricted portion 8 · · Shear key

Here, the symmetrical positional relationship means that when the building is shaken, the constricted portions of the joint hardware arranged with the shear key sandwiched alternately expands and contracts so that the movement around the shear key is generated. Any positional relationship of the joint hardware may be used, and it is not necessary to have a geometrically strict positional relationship. With such a joint structure, the constricted part of each joint hardware arranged symmetrically with the shear key in between is plasticized, thereby reducing the maximum load applied to the bonded portion between each joint hardware and the wooden member. The destruction of the entire joint portion can be suppressed.

The metal fitting has a rough surface portion having a protrusion or a groove formed so that at least a surface in the drawing direction from the hole or groove is perpendicular to the longitudinal direction of the metal joint. It may be formed on the outer peripheral surface. If such a joint metal is used for the above joint structure, even if an axial load is applied to the joint metal, the movement of the joint metal relative to the adhesive is blocked by the standing surface, and the relative position of the joint metal relative to the adhesive is Slight movement is also suppressed. As a result, almost no breakage occurs at the interface between the bonding hardware and the adhesive. For this reason, destruction of the interface between the joint metal and the adhesive is suppressed, and the deformation performance of the joint portion of the wooden member is improved.

If it is the said joining structure of a wooden member, the deformation | transformation performance of a joining part can be improved by suppressing destruction of the joining part of the wooden member using a joining metal fitting.

Claims (5)

It is a joint structure that is used for the structural materials of buildings or between the structural materials and non-structural materials,
A hole dug in the longitudinal direction of the wooden member from the end of a rod-shaped or plate-shaped wooden member used as the structural material or non-structural material among the structural materials or between the structural material and the non-structural material Or a rod-shaped joint hardware inserted in the groove,
In a state where the end surface of the wooden member is abutted against the mating member, one end fits into a hole formed in the center of the end surface of the wooden member, and a shear key whose other end fits into the hole of the mating member;
An adhesive filled in the hole or groove into which the metal fitting is inserted, and
The joint hardware has a constricted portion that is narrower than the surroundings at a location located at the end of the wooden member,
The joint hardware is provided with a plurality of joint portions in a symmetrical positional relationship with the shear key as a center, and the wooden member and the mating member are joined with a gap therebetween,
Joint structure of wooden members. The joint metal has a rough surface portion having a projection or groove in which at least a surface in the drawing direction from the hole or groove is perpendicular to the longitudinal direction of the joint metal, and the outer peripheral surface of the rod-shaped part of the joint metal Formed in the
The joining structure of the wooden member of Claim 1. The rough surface portion has a protrusion or groove formed in an annular shape around the rod-shaped portion,
The joining structure of the wooden member of Claim 2. The building is a wooden building structure,
The joint hardware is inserted into holes or grooves respectively formed in wooden pillars and beams that are abutted at the joint portion,
The joining structure of the wooden member as described in any one of Claim 1 to 3. The building is a wooden building structure,
The joint hardware is inserted into a hole or a groove formed in each wooden beam that is abutted across the pillar in the joint portion,
The joining structure of the wooden member as described in any one of Claim 1 to 3.

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