JP2007120097A - High strength bolt joint structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact high strength bolt joint structure at low cost. <P>SOLUTION: This high strength bolt joint structure 1 has: a plurality of joint plates stretched over beams 3a, 3b and provided so as to nip the beams 3a, 3b; and a plurality of high strength bolts tightened by passing through the joint plates and the beams 3a, 3b so as to join the beams 3a, 3b by resistance force generated among the joint plates and the beams 3a, 3b by tightening force of the high strength bolts. Here, a plurality of projections 9a are provided on faces in contact with the beams 3a, 3b of the joint plates, and bite surfaces of the beams 3a, 3b to generate resistance force. The projection 9a is like a cone, its bottom face has a recessed polygonal shape, its height and its width are equal, and a shape of the bottom face provides larger resistance force when compared with a projection having a projecting polygonal shape. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、高力ボルト接合構造に関するものである。   The present invention relates to a high-strength bolt joint structure.

従来、梁、柱、筋違等の建築構造物の接続方法としては、高力ボルトを使用した摩擦接合が用いられている。   Conventionally, friction bonding using high-strength bolts has been used as a method for connecting building structures such as beams, columns, and struts.

摩擦接合とはボルトに軸力を導入して接合部材を締め付け、部材間に発生する摩擦力によって部材同士を接続する方法である。   Friction welding is a method in which an axial force is introduced into a bolt to fasten a joining member and the members are connected by a frictional force generated between the members.

一方、摩擦接合では、摩擦力が接合部の摩擦係数とボルトの軸力に依存する。 しかしながら、建築構造物で使用される鋼材の摩擦接合面は、通常、赤錆面やショットブラスト面等とする処理がされるが、大きな摩擦係数を安定して得ることは困難で、摩擦係数は０．４５に設定されている。従って、大きな摩擦力を得ようとする場合、ボルトの軸力を大きくしなければならない。そのため、ボルトの本数を増やしたり、ボルトの径を大きくしたりしなくてはならず、接合部が大型化し、コストが高くなる。   On the other hand, in friction welding, the frictional force depends on the friction coefficient of the joint and the axial force of the bolt. However, the friction joint surfaces of steel materials used in building structures are usually treated as red rust surfaces or shot blast surfaces, but it is difficult to stably obtain a large friction coefficient, and the friction coefficient is 0. .45 is set. Therefore, in order to obtain a large frictional force, the axial force of the bolt must be increased. Therefore, the number of bolts must be increased or the diameter of the bolts must be increased, resulting in an increase in the size of the joint and the cost.

そこで、接合部に突起を設けて、対向する部材にくい込ませることにより、見掛けの摩擦係数を大きくしている場合があり、以下のようなものが知られている。
（特許文献１）。
特開平１０-１８４２３号公報 Therefore, there is a case where the apparent friction coefficient is increased by providing a protrusion at the joint portion so that the opposing member is not easily inserted, and the following are known.
(Patent Document 1).
Japanese Patent Laid-Open No. 10-18423

しかしながら、このような構造でも摩擦係数の上昇は小さく、対策としては不十分であった。   However, even in such a structure, the increase in the coefficient of friction is small, which is insufficient as a countermeasure.

本発明は、このような問題に鑑みてなされたもので、その目的は小型で低コストの高力ボルト接合構造を提供することにある。   The present invention has been made in view of such problems, and an object of the present invention is to provide a high-strength bolt joint structure that is small in size and low in cost.

前述した目的を達成するために、本発明は、接合部材と、被接合部材と、前記接合部材と前記被接合部材とを貫通して押圧する高力ボルトを具備し、前記接合部材は、前記被接合部材と対向する面に突起を有し、前記突起は、略錐体状でその底面の形状が、底面の外周に少なくとも１つの凹部を有し、前記突起が、前記被接合部材にくい込むことを特徴とする高力ボルト接合構造である。   In order to achieve the above-described object, the present invention includes a joining member, a joined member, and a high-strength bolt that penetrates and presses the joining member and the joined member. The protrusion has a protrusion on the surface facing the member to be bonded, and the protrusion has a substantially conical shape, and the shape of the bottom surface has at least one concave portion on the outer periphery of the bottom surface. This is a high-strength bolt joint structure.

前記突起は、その底面の形状は略凹多角形状であることが望ましい。
前記突起は、前記略凹多角形の底面の面積が、前記凹多角形の凸な頂点を結んでできる形状の面積の２／３以下であることが望ましい。 It is desirable that the protrusion has a substantially concave polygonal shape at the bottom.
It is desirable that the protrusion has an area of the bottom surface of the substantially concave polygon that is 2/3 or less of an area formed by connecting the convex vertices of the concave polygon.

本発明によれば小型で低コストの高力ボルト接合構造を提供することができる。   According to the present invention, it is possible to provide a high-strength bolt joint structure that is small in size and low in cost.

以下、図面に基づいて本発明に好適な実施形態を詳細に説明する。図１は、本実施形態に係る高力ボルト接合構造１を示す斜視図であって、図２は図１の側面図、図３は図１のＡ−Ａ断面図、図４は図１の接合板および梁の構造を示す詳細図である。   DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail based on the drawings. 1 is a perspective view showing a high-strength bolt joint structure 1 according to the present embodiment. FIG. 2 is a side view of FIG. 1, FIG. 3 is a cross-sectional view taken along the line AA of FIG. It is detail drawing which shows the structure of a joining board and a beam.

図１、図２および図３に示すように、高力ボルト接合構造１は梁３ａ、３ｂを有し、接合板５ａと接合板５ｂ、５ｃは梁３ａ、３ｂを挟むようにして設けられている。
高力ボルト７ａは接合板５ａ、５ｂ、梁３ａを貫通するように設けられており、高力ボルト７ｂは接合板５ａ、５ｂ、梁３ｂを貫通するように設けられている。 As shown in FIGS. 1, 2 and 3, the high-strength bolt joint structure 1 has beams 3a and 3b, and the joint plate 5a and the joint plates 5b and 5c are provided so as to sandwich the beams 3a and 3b.
The high strength bolt 7a is provided so as to penetrate the joining plates 5a, 5b and the beam 3a, and the high strength bolt 7b is provided so as to penetrate the joining plates 5a, 5b and the beam 3b.

また、高力ボルト７ｃは接合板５ａ、５ｃ、梁３ａを貫通するように設けられており、高力ボルト７ｄは接合板５ａ、５ｃ、梁３ｂを貫通するように設けられている。
即ち、梁３ａ、３ｂは接合板５ａ、５ｂ、５ｃを介して高力ボルト７ａ、７ｂ、７ｃ、７ｄにより接合されている。 Further, the high strength bolt 7c is provided so as to penetrate the joining plates 5a, 5c and the beam 3a, and the high strength bolt 7d is provided so as to penetrate the joining plates 5a, 5c and the beam 3b.
That is, the beams 3a and 3b are joined by the high strength bolts 7a, 7b, 7c and 7d via the joining plates 5a, 5b and 5c.

同様に接合板５ｄと接合板５ｅは梁３ａ、３ｂを挟むようにして設けられている。
高力ボルト７ｅは接合板５ｄ、５ｅ、梁３ａを貫通するように設けられており、高力ボルト７ｆは接合板５ｄ、５ｅ、梁３ｂを貫通するように設けられている。
即ち、梁３ａ、３ｂは接合板５ｄ、５ｅを介して高力ボルト７ｅ、７ｆによっても接合されている。 Similarly, the joining plate 5d and the joining plate 5e are provided so as to sandwich the beams 3a and 3b.
The high strength bolt 7e is provided so as to penetrate the joining plates 5d, 5e and the beam 3a, and the high strength bolt 7f is provided so as to penetrate the joining plates 5d, 5e and the beam 3b.
That is, the beams 3a and 3b are also joined by the high strength bolts 7e and 7f through the joining plates 5d and 5e.

さらに、接合板５ｆと接合板５ｇ、５ｈは梁３ａ、３ｂを挟むようにして設けられている。
高力ボルト７ｇ、７ｈは接合板５ｆ、５ｇ、梁３ａを貫通するように設けられており、高力ボルト７ｉ，７ｊは接合板５ｆ、５ｇ、梁３ｂを貫通するように設けられている。 Further, the joining plate 5f and the joining plates 5g and 5h are provided so as to sandwich the beams 3a and 3b.
The high strength bolts 7g and 7h are provided so as to penetrate the joining plates 5f and 5g and the beam 3a, and the high strength bolts 7i and 7j are provided so as to penetrate the joining plates 5f and 5g and the beam 3b.

また、高力ボルト７ｋは接合板５ｆ、５ｈ、梁３ａを貫通するように設けられており、図示しない高力ボルトは接合板５ｆ、５ｈ、梁３ｂを貫通するように設けられている。
即ち、梁３ａ、３ｂは接合板５ｆ、５ｇ、５ｈを介して高力ボルト７ｇ、７ｈ、７ｉ、７ｊ、７ｋおよび図示しない高力ボルトによっても接合されている。 The high-strength bolt 7k is provided so as to pass through the joining plates 5f and 5h and the beam 3a, and the high-strength bolt (not shown) is provided so as to penetrate the joining plates 5f and 5h and the beam 3b.
That is, the beams 3a and 3b are also joined by high strength bolts 7g, 7h, 7i, 7j, and 7k and high strength bolts (not shown) through the joining plates 5f, 5g, and 5h.

なお、図４に示すように、梁３ａ、３ｂ、接合板５ｆ、５ｇには高力ボルト７ｇ、７ｈ、７ｉ、７ｊを通すための穴１０ｇ、１０ｈ、１０ｉ、１０ｊ、１２ｇ、１２ｈ、１２ｉ、１２ｊ、１４ｇ、１４ｈ、１４ｉ、１４ｊが設けられている。   As shown in FIG. 4, holes 10g, 10h, 10i, 10j, 12g, 12h, 12i, through which high-strength bolts 7g, 7h, 7i, 7j are passed through the beams 3a, 3b and the joining plates 5f, 5g, 12j, 14g, 14h, 14i, and 14j are provided.

なお、接合板５ａ、５ｂ、５ｃ、５ｄ、５ｅ、５ｈにも同様に高力ボルトを通すための図示しない穴が設けられている。   Similarly, holes (not shown) for passing high-strength bolts are provided in the joining plates 5a, 5b, 5c, 5d, 5e, and 5h.

ここで、図４に示すように、接合板５ｆおよび５ｇの梁３ａ、３ｂと接する面には複数の突起９ａ、９ｂ、９ｃ、９ｄ、９ｅ、９ｆ、９ｇ、９ｈが設けられている。   Here, as shown in FIG. 4, a plurality of projections 9a, 9b, 9c, 9d, 9e, 9f, 9g, and 9h are provided on the surfaces of the joining plates 5f and 5g in contact with the beams 3a and 3b.

即ち、突起９ａ、９ｂ、９ｃ、９ｄ、９ｅ、９ｆ、９ｇ、９ｈが梁３ａ、３ｂの表面に食い込むことにより、梁３ａ、３ｂとの間に突起の掘り起こしによる抵抗力が作用するようになっている。
突起９ａ、９ｂ、９ｃ、９ｄ、９ｅ、９ｆ、９ｇ、９ｈの材質は梁３ａ、３ｂの材質である鋼材よりも硬いことが望ましく、例えば焼き入れ鋼やセラミック等が用いられる。 That is, when the protrusions 9a, 9b, 9c, 9d, 9e, 9f, 9g, and 9h bite into the surfaces of the beams 3a and 3b, a resistance force due to the protrusion of the protrusions acts between the beams 3a and 3b. ing.
The material of the protrusions 9a, 9b, 9c, 9d, 9e, 9f, 9g, and 9h is preferably harder than the steel material that is the material of the beams 3a and 3b. For example, hardened steel or ceramic is used.

また、突起９ａ、９ｂ、９ｃ、９ｄ、９ｅ、９ｆ、９ｇ、９ｈは接合板５ｆおよび５ｇ上に機械加工によって一体に形成されるが、別部品として接合板５ｆおよび５ｇ上に取り付けるようにしてもよい。
なお、突起は他の接合板の梁３ａ、３ｂと接する面にも設けられている。 The protrusions 9a, 9b, 9c, 9d, 9e, 9f, 9g, and 9h are integrally formed on the joining plates 5f and 5g by machining. However, the protrusions 9a, 9b, 9c, 9d, 9e, 9f, 9g, and 9h are integrally formed on the joining plates 5f and 5g. Also good.
The protrusions are also provided on the surfaces of the other joining plates that are in contact with the beams 3a and 3b.

次に、突起の形状について説明する。図５は突起９ａを示す斜視図であって、図６は図５のＢ方向矢視図、図７は図５のＣ方向矢視図である。
また、図８および図９は突起９ａの底面１１を示す図である。
なお、突起９ｂ、９ｃ、９ｄ、９ｅ、９ｆ、９ｇ、９ｈの形状は突起９ａと同様であるため、説明を省略する。 Next, the shape of the protrusion will be described. 5 is a perspective view showing the protrusion 9a, FIG. 6 is a view in the direction of arrow B in FIG. 5, and FIG. 7 is a view in the direction of arrow C in FIG.
8 and 9 are views showing the bottom surface 11 of the protrusion 9a.
Note that the shapes of the protrusions 9b, 9c, 9d, 9e, 9f, 9g, and 9h are the same as those of the protrusion 9a, and thus the description thereof is omitted.

図５〜図７に示すように、突起９ａの形状は、底面１１から頂点１１ａにいくに従い、断面積が小さくなる錐体であり、底面１１は凹多角形状を有している。   As shown in FIGS. 5 to 7, the shape of the protrusion 9 a is a cone whose sectional area decreases from the bottom surface 11 to the vertex 11 a, and the bottom surface 11 has a concave polygonal shape.

なお、理由は後述するが、底面１１の面積Ｓ１は（図８参照）、図９に示すような、凹多角形の凸な頂点１３ａ、１３ｂ、１３ｃ、１３ｄを結んで形成される凸多角形の面積Ｓ２の２／３以下であることが望ましい。   Although the reason will be described later, the area S1 of the bottom surface 11 (see FIG. 8) is a convex polygon formed by connecting convex vertices 13a, 13b, 13c, 13d of the concave polygon as shown in FIG. It is desirable that it is 2/3 or less of the area S2.

次に、突起の形状と見掛けの摩擦係数の関係について説明する。
図１０は四角錐の突起１５を示す図であって、図１１は板材１３に突起１５を押し込んだ状態を示す図、図１２は図１１の状態から突起１５に荷重を加えた場合を示す図である。また図１３は図１１のＤ−Ｄ断面図であり、図１４は図１１のＥ方向矢視図である。 Next, the relationship between the shape of the protrusion and the apparent friction coefficient will be described.
FIG. 10 is a diagram showing a quadrangular pyramid projection 15, FIG. 11 is a diagram showing a state in which the projection 15 is pushed into the plate material 13, and FIG. 12 is a diagram showing a case where a load is applied to the projection 15 from the state of FIG. It is. 13 is a sectional view taken along the line DD of FIG. 11, and FIG. 14 is a view taken in the direction of arrow E in FIG.

さらに、図１５は掘り起こし抵抗により決まる見掛けの摩擦係数と突起の頂角の関係を示す図である。
また、図１６は突起の形状の別の実施例を示す図であって、図１７は図１６のＨ方向矢視図である。 Further, FIG. 15 is a diagram showing the relationship between the apparent friction coefficient determined by the digging resistance and the apex angle of the protrusion.
FIG. 16 is a view showing another embodiment of the shape of the protrusion, and FIG. 17 is a view taken in the direction of the arrow H in FIG.

例えば、図１０に示すような四角錐の突起１５を、図１１に示すように板材１３にＦ方向（鉛直方向）に押し込み、図１２に示すようにＧ方向（水平方向）に荷重を加えたとする。
なお、突起１５のビッカース硬度は板材１３のビッカース硬度よりも充分に大きく、突起１５の変形は無視できるものとする。 For example, when a quadrangular pyramid protrusion 15 as shown in FIG. 10 is pushed into the plate 13 in the F direction (vertical direction) as shown in FIG. 11, and a load is applied in the G direction (horizontal direction) as shown in FIG. To do.
Note that the Vickers hardness of the protrusion 15 is sufficiently larger than the Vickers hardness of the plate member 13, and the deformation of the protrusion 15 can be ignored.

この場合、突起１５と板材１３の間に生じる掘り起こしによる抵抗力Ｆｐと、図１３に示すすべり方向の投影面積Ａｐは比例関係にあり、板材１３のビッカース硬度Ｈｖを用いて以下の式で表される。
Ｆｐ＝Ａｐ・Ｈｖ In this case, the resistance force Fp caused by the digging generated between the protrusion 15 and the plate material 13 and the projected area Ap in the slip direction shown in FIG. 13 are in a proportional relationship, and are expressed by the following formula using the Vickers hardness Hv of the plate material 13. The
Fp = Ap / Hv

また、接合面の総圧力Ｗと図１４に示す真実接触面積ＡＲも同様に以下の式が成立する。
Ｗ＝ＡＲ・Ｈｖ Similarly, the following formula is established for the total pressure W of the joint surface and the true contact area AR shown in FIG.
W = AR ・ Hv

上記２式から以下の式を導出できる。
Ｆｐ＝（Ａｐ／ＡＲ）・Ｗ The following equations can be derived from the above two equations.
Fp = (Ap / AR) · W

即ち、圧力が等しい場合、Ａｐに対するＡＲの比を小さくすれば、より大きな抵抗力を得ることができ、従って見掛けの摩擦係数を大きくすることができる。   That is, when the pressure is equal, if the ratio of AR to Ap is reduced, a larger resistance can be obtained, and thus the apparent friction coefficient can be increased.

具体的には図５に示す突起９ａのように、突起の頂角を変えずに（頂角１１ｂと頂角１５ａが等しい）底面１１を凹多角形にするとよい。
突起９ａは突起１５と比べてＡｐは変わらないが、ＡＲが小さくなるため、Ａｐに対するＡＲの比を突起１５よりも小さくすることができる。 Specifically, like the projection 9a shown in FIG. 5, the bottom surface 11 may be a concave polygon without changing the apex angle of the projection (the apex angle 11b and the apex angle 15a are equal).
The protrusion 9a does not change Ap compared to the protrusion 15, but since the AR becomes smaller, the ratio of AR to Ap can be made smaller than that of the protrusion 15.

即ち、図１５に示すように、凸多角形である四角錐と比べて、底面の断面積を小さくした凹多角形は、突起の頂角が等しい場合、断面積が小さくなるにつれて見掛けの摩擦係数が大きくなる。   That is, as shown in FIG. 15, a concave polygon having a smaller cross-sectional area of the bottom surface compared to a quadrangular pyramid having a convex polygon has an apparent coefficient of friction as the cross-sectional area decreases when the apex angle of the protrusion is equal. Becomes larger.

例えば、底面の断面積が四角錐の３／４の凹多角形である突起は、波型（図示せず）よりも見掛けの摩擦係数が小さいが、断面積が２／３の凹多角形である突起は、波型よりも見掛けの摩擦係数が大きくなる。   For example, a protrusion whose bottom cross-sectional area is a 3/4 concave polygon with a quadrangular pyramid has a smaller friction coefficient than a corrugated shape (not shown), but is a concave polygon with a cross-sectional area of 2/3. Some protrusions have an apparent friction coefficient larger than that of the corrugations.

そして、底面の断面積が１／２の凹多角形である突起は凸多角形と比べて見掛けの摩擦係数が約２倍になる。   And the protrusion which is a concave polygon whose cross-sectional area of a bottom face is 1/2 has an apparent friction coefficient about twice that of a convex polygon.

従って、断面積が凸多角形の２／３以下になるような凹多角形の断面を有する突起を接合板５ｆに設けることにより、梁３ａの材質や、高力ボルトの締め付け力を変更することなく、梁３ａと接合板５ｆとの間の見掛けの摩擦係数を大きくすることができる。   Therefore, the material of the beam 3a and the tightening force of the high-strength bolt can be changed by providing the joint plate 5f with a projection having a concave polygonal cross section whose cross-sectional area is 2/3 or less of the convex polygon. In addition, the apparent friction coefficient between the beam 3a and the joining plate 5f can be increased.

見掛けの摩擦係数が大きくなると、小さい締付力（押圧力）で大きな応力を伝達できるため、高力ボルトの本数を減らしたり、径を小さくしたりすることができ、高力ボルト接合構造１を小型化することができる。   When the apparent coefficient of friction increases, a large stress can be transmitted with a small tightening force (pressing force), so the number of high-strength bolts can be reduced and the diameter can be reduced. It can be downsized.

なお、突起の底面の形状は凹多角形に限定されるものではない。
例えば、図１６および図１７に示すように、円錐の底面を円形状に切り欠いた突起１５ａでも同様の効果が得られる。 The shape of the bottom surface of the protrusion is not limited to the concave polygon.
For example, as shown in FIGS. 16 and 17, the same effect can be obtained with a protrusion 15 a in which the bottom surface of a cone is cut out in a circular shape.

この場合は突起１５ａの底面１６の断面積Ｓ３（図１７参照）が、Ｓ３に切り欠き部の断面積Ｓ４〜Ｓ７を加えた面積（円錐の断面積）の２／３以下であれば波型よりも見掛けの摩擦係数を大きくすることができる。   In this case, if the cross-sectional area S3 (see FIG. 17) of the bottom surface 16 of the projection 15a is 2/3 or less of the area (conical cross-sectional area) of S3 plus the cross-sectional areas S4 to S7 of the notches, The apparent friction coefficient can be increased.

このように、本実施の形態によれば、高力ボルト接合構造１は、梁３ａ、３ｂが接合板５ａ、５ｂ、５ｃ、５ｄ、５ｅ、５ｆ、５ｇ、５ｈに挟まれるように設けられており、接合板と梁３ａ、３ｂの接する面には断面が凹多角形である突起９ａ、９ｂ、９ｃ、９ｄ、９ｅ、９ｆ、９ｇ、９ｈが設けられている。
従って、ボルトの軸力を変化させずに見掛けの摩擦係数を大きくできるため、高力ボルト接合構造１を小型化することができ、コストが低減される。 Thus, according to the present embodiment, the high-strength bolt joint structure 1 is provided such that the beams 3a and 3b are sandwiched between the joint plates 5a, 5b, 5c, 5d, 5e, 5f, 5g, and 5h. In addition, projections 9a, 9b, 9c, 9d, 9e, 9f, 9g, and 9h having a concave polygonal cross section are provided on the surface where the joining plate and the beams 3a and 3b are in contact with each other.
Therefore, since the apparent friction coefficient can be increased without changing the axial force of the bolt, the high-strength bolt joint structure 1 can be reduced in size and the cost is reduced.

以上、添付図面を参照しながら、本発明の実施形態を説明したが、本発明の技術的範囲は、前述した実施の形態に左右されない。当業者であれば、特許請求の範囲に記載された技術的思想の範疇内において各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。   As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

例えば、本実施形態では高力ボルト接合構造１は梁３ａと梁３ｂを接合した構造だが、柱や筋違を接合した構造であってもよい。   For example, in the present embodiment, the high-strength bolt joint structure 1 is a structure in which the beams 3a and 3b are joined, but may be a structure in which columns and struts are joined.

高力ボルト接合構造１を示す斜視図Perspective view showing high-strength bolt joint structure 1 図１の側面図Side view of FIG. 図１のＡ−Ａ断面図AA sectional view of FIG. 図１の接合板５ｆ、５ｇおよび梁３ａ、３ｂの構造を示す詳細図Detailed view showing the structure of the joining plates 5f, 5g and beams 3a, 3b of FIG. 突起９ａを示す斜視図Perspective view showing the protrusion 9a 図５のＢ方向矢視図B direction arrow view of FIG. 図５のＣ方向矢視図C direction arrow view of FIG. 突起９ａの底面１１を示す図The figure which shows the bottom face 11 of the protrusion 9a 突起９ａの底面１１を示す図The figure which shows the bottom face 11 of the protrusion 9a 四角錐の突起１５を示す図The figure which shows the processus | protrusion 15 of a square pyramid 板材１３に突起１５を押し込んだ状態を示す図The figure which shows the state which pushed the protrusion 15 in the board | plate material 13. 図１１の状態から突起１５に荷重を加えた場合を示す図The figure which shows the case where a load is applied to the protrusion 15 from the state of FIG. 図１１のＤ−Ｄ断面図DD sectional view of FIG. 図１１のＥ方向矢視図E direction arrow view of FIG. 掘り起こし抵抗により決まる見掛けの摩擦係数と突起の形状の関係を示す図Diagram showing the relationship between the apparent friction coefficient determined by the resistance to digging and the shape of the protrusion 突起の形状の別の実施例を示す図The figure which shows another Example of the shape of a processus | protrusion 図１６のＨ方向矢視図H direction arrow view of FIG.

符号の説明Explanation of symbols

１…………高力ボルト接合構造
３ａ………梁
５ａ………接合板
７ａ………高力ボルト
９ａ………突起
１０ａ……穴
１１………底面
１１ａ……頂点
１３………板材
１５………突起 1 ............ High-strength bolt joint structure 3a ......... Beam 5a ......... Joint plate 7a ......... High-strength bolt 9a ......... Protrusion 10a ... Hole 11 ......... Bottom face 11a ... Vertex 13 ......... Board material 15 ......... Protrusions

Claims (3)

接合部材と、被接合部材と、
前記接合部材と前記被接合部材とを貫通して押圧する高力ボルトを具備し、
前記接合部材は、前記被接合部材と対向する面に突起を有し、
前記突起は、略錐体状でその底面の形状が、底面の外周に少なくとも１つの凹部を有し、
前記突起が、前記被接合部材にくい込むことを特徴とする高力ボルト接合構造。 A joining member, a joined member,
Comprising a high-strength bolt that penetrates and presses through the joining member and the joined member;
The joining member has a protrusion on a surface facing the joined member,
The protrusion has a substantially conical shape, and the shape of the bottom surface has at least one concave portion on the outer periphery of the bottom surface,
The high-strength bolt joint structure, wherein the protrusion is inserted into the member to be joined. 前記突起は、その底面の形状が、略凹多角形状であることを特徴とする請求項１記載の高力ボルト接合構造。   The high-strength bolt joint structure according to claim 1, wherein a shape of the bottom surface of the protrusion is a substantially concave polygonal shape. 前記突起は、前記略凹多角形状の底面の面積が、前記凹多角形の凸な頂点を結んでできる形状の面積に対して２／３以下であることを特徴とする請求項１または請求項２のいずれかに記載の高力ボルト接合構造。   The area of the bottom surface of the substantially concave polygonal shape is 2/3 or less of the area of the shape formed by connecting the convex vertices of the concave polygonal shape. 2. The high-strength bolt joint structure according to any one of 2 above.

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