【０００１】
【発明の属する技術分野】
本発明は、鋼管杭等の一方の杭端部にボックス継ぎ手材を設けると共に、他方の杭端部にピン継ぎ手材を設けて、杭軸芯方向で隣り合う杭のボックス継ぎ手材とピン継ぎ手材とを互いに抜け止め状態で接続自在に構成した杭に関するものである。
【０００２】
【従来の技術】
建築構造物の施工においては鋼管の利用が多くなってきており、例えば、鋼管を用いた矢板（鋼管矢板）どうしを柱列状に結合した鋼管柱列土留壁や建造物を支持する鋼管杭として用いられている。
それらの鋼管矢板及び鋼管杭の機械式継手として、軸部（オス部）外周面部の周方向に沿う外向き溝部もしくは筒部（メス部）内周面に周方向に沿う内向き溝部内に弾性リングキーを、内向き溝部と外向き溝部とに跨る状態で嵌入するリング式継手が知られている。（特許文献１参照）
また、端部にめねじ継手部を有する鋼管杭本体と、端部におねじ継手部を有する鋼管杭本体とからなるねじ式継手が知られている。（特許文献２参照）
しかしながら、従来の鋼管杭の継手、例えば、リング式継手及びねじ式継手は接合時間が非常に長くなるという問題がある。
【０００３】
特許文献１ 特開２０００−２９０９９７号公報
特許文献２ 特開平１１−６１４５号公報
【０００４】
【発明が解決しようとする課題】
本発明は、従来の杭の接続における上記問題を解決すべくになされたものであって、その第１の目的は、杭の継ぎ手の接合時間を短くすることである。
第２の目的は、杭の継ぎ手部の抜き差しを自由にできるようにすることである。
第３の目的は、杭の継手部に曲げが加わっても継ぎ手部が抜け出さないようにすることである。
【０００５】
【課題を解決するための手段】
請求項１に係る発明は、互いに嵌合可能なボックス継ぎ手材及びピン継ぎ手材からなる縦継ぎ装置のボックス継ぎ手材又はピン継ぎ手材を端部に有する杭であって、 該ボックス継ぎ手材の周方向に沿う凹部を形成するとともに、該ピン継ぎ手材の外周面部に該凹部に対応する周方向に沿う凸部を形成し、かつ、該ピン継ぎ手材にはスリットを長手方向に形成し、該ボックス継ぎ手材の該凹部にピン継ぎ手材の凸部がはまり込むように構成したことを特徴とする杭である。
【０００６】
請求項１に係る発明によれば、ピン継ぎ手材の長手方向にスリットを形成することにより、ピン継ぎ手材は弾性範囲内で径方向に拡縮可能になり、ピン継ぎ手材をボックス継ぎ手材に押し込むことで、ピン継ぎ手材がスリットにより縮み、その後、拡がり、ピン継ぎ手材の凸部とボックス継ぎ手材の凹部とがワンタッチで係合するので、接合時間を短くすることができる。
【０００７】
請求項２に係る発明は、前記ピン継ぎ手材の凸部及びそれに対応する凹部を複数設け、先端への凸部程、長手方向に大なる凸部に構成した杭である。
【０００８】
請求項２に係る発明によれば、先端程の長手方向に大なる凸部は、先の凹部にはまり込まず、スムーズに嵌合する。
【０００９】
請求項３に係る発明は、前記ピン継ぎ手材の凸部に差し込みやすいコーナ部を設けた杭である。
【００１０】
請求項３に係る発明によれば、前記ピン継ぎ手材の凸部に設けた差し込みやすいコーナ部により、ボックス継ぎ手材にピン継ぎ手材を容易に挿入できる。
【００１１】
請求項４に係る発明は、前記ボックス継ぎ手材の外周面に、前記ピン継ぎ手材に係脱自在に係止する手段を設けた杭である。
【００１２】
請求項４に係る発明によれば、係止する手段により、ボックス継ぎ手材とピン継ぎ手材との回り止めが可能であり、また、抜けだしも可能である。
【００１３】
請求項５に係る発明は、前記ボックス継ぎ手材の外周面にボルトを設け、前記ピン継ぎ手材の凸部を圧接する構成にした杭である。
【００１４】
請求項５に係る発明によれば、ボックス継ぎ手材とピン継ぎ手材との抜き差しがボルトにより可能であり、互いに嵌合する継ぎ手間に異物などが噛み込んだとき、ボックス継ぎ手材からピン継ぎ手材を外し、再び、ピン継ぎ手材をボックス継ぎ手材に嵌合できる。
【００１５】
請求項６に係る発明は、前記ボックス継ぎ手材には上端内部側に円弧状突起を、下方にほぞ穴を形成し、また、前記ピン継ぎ手材には、該ボックス継ぎ手材の円弧状突起が嵌合するほぞ穴を、該ボックス継ぎ手材のほぞ穴に嵌合する円弧状突起を形成し、該ボックス継ぎ手材とピン継ぎ手材とが抜け出さない構成にした杭である。
【００１６】
請求項６に係る発明によれば、ピン継ぎ手材とボックス継ぎ手材との接合部に曲げ力が加わっても円弧状突起とほぞ穴により抜け出さなくなる。
【００１７】
【発明の実施の形態】
図１は、本発明に係る鋼管杭の嵌合前を説明する斜視図であり、図２は鋼管杭の嵌合中を説明する斜視図であり、図３は嵌合後を説明する斜視図であり、図４は嵌合後の鋼管杭の正面断面図である。
本発明の実施の形態について図１〜４を参照して説明する。
上鋼管杭１の下端部に円筒状のピン継ぎ手材（オス部）３を溶接して杭を構成する。 ピン継ぎ手材３の外周面には周方向に凸部３ｃを形成し、ピン継ぎ手材３の下端部からスリット３ａを適当数形成する。ピン継ぎ手材３の外周面には回り止めボルト穴３ｂを形成する。
なお、ピン継ぎ手材３の外周面の凸部３ｃに回り止めボルト穴３ｂを形成するとボルト穴３ｂに回り止めボルト４ｂが螺合し易くなる。
【００１８】
下鋼管杭２の上端部に円筒状のボックス継ぎ手材４を溶接して杭を構成する。ボックス継ぎ手材４の内周面には周方向の溝による凹部４ｃを形成する。
そして、その凹部４ｃはピン継ぎ手材３の凸部３ｃが嵌合する大きさである。
ボックス継ぎ手４の外周面には回り止めボルト４ｂを設け、回り止めボルト４ｂが螺入されることによりピン継ぎ手材３の凸部３ｃに形成した回り止め穴３ｂに螺合される。
【００１９】
次に、接続の方法を説明すると、図１に示すように、ピン継ぎ手材３をボックス継ぎ手材４の上の位置にて杭軸芯を合わせる。ピン継ぎ手材３先端を下降させ、ボックス継ぎ手材４に嵌合させる。（図２）
さらに、ピン継ぎ手材３を下降させると、スリット３ａによりピン継ぎ手材３の下端の径は縮小し、ボックス継ぎ手材４にピン継ぎ手材３が嵌合すると共に、ピン継ぎ手材３の凸部３ｃがボックス継ぎ手材４の凹部４ｃに嵌合する。（図３、４）いわゆる、ワンタッチでボックス継ぎ手材４にピン継ぎ手材３が係合できる。
なお、ピン継ぎ手材とボックス継ぎ手材とを逆にした場合は、ボックス継ぎ手材４をピン継ぎ手材の上の位置にて杭軸芯を合わせ、ボックス継ぎ手材４先端を下降させ、ピン継ぎ手材３に嵌合できる。
【００２０】
次に、本発明の第２実施の形態であるボックス継ぎ手材４とピン継ぎ手材３とが抜き差し自在な機構を備えた鋼管杭を説明する。
図５は、抜き差し自在な機構を説明するための概略図である。
ピン継ぎ手材３の外周面に形成した凸部３ｃがボックス継ぎ手材４の内周面に形成した凹部４ｃに嵌合して係合されている。
ボックス継ぎ手材４の外周面に埋め込みボルト５を設け、埋め込みボルト５を螺入することにより、埋め込みボルト５がピン継ぎ手材３の凸部３ｃに突当たる構成になっている。
【００２１】
ボックス継ぎ手材４からピン継ぎ手材３を外すときは、回り止めボルト４ｂ（図１）を抜いて、ボックス継ぎ手材４の外周面から埋め込みボルト５を螺入し、ピン継ぎ手材３の凸部３ｃが鋼管杭の内部方へ押されることにより、ピン継ぎ手材３の凸部３ｃとボックス継ぎ手材４の凹部４ｃとの嵌合が外れる。
その状態で、ピン継ぎ手材３を持ち上げることにより、ボックス継ぎ手材４からピン継ぎ手材３を抜くことができる。
【００２２】
本発明の第３の実施の形態である抜け止め防止機構を説明する。
図６は抜け止め防止機構を説明するための概略図である。
ボックス継ぎ手材４には、上端内部側に、円弧状突起４ｄを、内周面部に、周方向に沿う内向き凹部４ｃを、内向き凹部４ｃの下方に、ほぞ穴４ｅをそれぞれ形成し、また、ピン継ぎ手材３には、ボックス継ぎ手材４の円弧状突起４ｄが嵌合するほぞ穴３ｄを、ボックス継ぎ手材４の内向き凹部４ｃに嵌合する凸部３ｃを、ボックス継ぎ手材４のほぞ穴４ｅに嵌合する円弧状突起３ｅをそれぞれ形成し、ボックス継ぎ手材４とピン継ぎ手材３とが抜け出ないように構成する。
ピン継ぎ手材３とボックス継ぎ手材４との接合部に曲げ力が加わっても、それぞれの突起とほぞ穴とが嵌合しているので抜けない。
なお、ボックス継ぎ手材４の円弧状突起４ｄとピン継ぎ手材３の円弧状突起３ｅは円筒状突起でも良い。
【００２３】
本発明の第４の実施の形態であるボックス継ぎ手材４にピン継ぎ手材３を挿入する機構を備えた鋼管杭を説明する。
図７は、前記挿入する機構を説明するための概略図である。
ピン継ぎ手材３の先端側の凸部３ｃ１を杭本体側の凸部３ｃよりも杭軸芯長手方向に大きく形成する。その先端側の凸部３ｃ１に対応するボックス継ぎ手材４の凹部４ｃ１の杭軸芯長手方向の長さｂもその杭本体側の凸部３ｃに対応するボックス継ぎ手材の凹部４ｃの杭軸芯長手方向の長さａより長く形成する。
ピン継ぎ手材３をボックス継ぎ手材４に挿入する場合、ピン継ぎ手材３の先端側の凸部は３ｃ１はボックス継ぎ手材４の先端側凹部４ｃにはまり込まず、杭本体側の凹部４ｃ１にはまり込む。よって、ピン継ぎ手材３とボックス継ぎ手材４とはスムーズに嵌合し、係合する。
【００２４】
本発明の第５の実施の形態であるボックス継ぎ手材４とピン継ぎ手材３と挿入する機構を備えた鋼管杭を説明する。
図８は、前記挿入する機構を説明するための概略図である。
ピン継ぎ手材３の外周面に形成した凸部３ｃがボックス継ぎ手材４の内周面に形成した凹部４ｃに嵌合する構成である。ピン継ぎ手材３の凸部３ｃの角部に差し込みやすいコーナ部４ｆを形成すると、そのコーナ部４ｆにボックス継ぎ手４の凹部４ｃの角部が接触しても、ボックス継ぎ手材４にピン継ぎ手材３が容易に差込みできる。
なお、そのコーナ部は差し込みし易い構成、例えば、テーパ部又は円弧部等である。
【００２５】
【発明の効果】
請求項１〜４に対応する効果：杭どうしを接続するのにワンタッチで接合でき、簡便であり、作業時間が非常に短くなる。
【００２６】
請求項２に対応する効果：ピン継ぎ手材の先端側の長手方向に大なる凸部はボックス継ぎ手材の先端側の長手方向に小なる凹部にははまり込まないで、ピン継ぎ手材とボックス継ぎ手材とはスムーズに嵌合し、係合する。
【００２７】
請求項３に対応する効果：ピン継ぎ手材の凸部に設けた差し込み易いコーナ部によりボックス継ぎ手材にピン継ぎ手材を容易に挿入できる。
【００２８】
請求項４に対応する効果：係止する手段により、ボックス継ぎ手材とピン継ぎ手材との回り止めが可能であり、また、抜けだしも可能である。
【００２９】
請求項５に対応する効果：ボックス継ぎ手材とピン継ぎ手材の接合部に異物などが噛み込んだときなど、接合部を外し、異物などを取り除き、再び接合できる。
また、接合部を外すことができるので回転止めボルトの芯合わせがし易くなる。
【００３０】
請求項６に対応する効果：ピン継ぎ手材とボックス継ぎ手材との接合部に曲げ力が加わっても突起とほぞ穴により抜け出さない。
【図面の簡単な説明】
【図１】本発明の杭のボックス継ぎ手材とピン継ぎ手材との嵌合前を説明する斜視図である。
【図２】本発明の杭のボックス継ぎ手材とピン継ぎ手材との嵌合中を説明する斜視図である。
【図３】本発明の杭のボックス継ぎ手材とピン継ぎ手材との嵌合後を説明する斜視図である。
【図４】図３に示された杭の正面断面図である。
【図５】本発明の第２の実施の形態を説明する概略図である。
【図６】本発明の第３の実施の形態を説明する概略図である。
【図７】本発明の第４の実施の形態を説明する概略図である。
【図８】本発明の第５の実施の形態を説明する概略図である。
【符号の説明】
１…上杭、２…下杭、３…ピン継ぎ手材、３ａ…スリット、３ｂ…回り止め穴、３ｃ…凸部、３ｄ…ほぞ穴、３ｅ…突起、４…ボックス継ぎ手材、４ｂ…回り止めボルト、４ｃ…凹部、４ｄ…突起、４ｅ…ほぞ穴、５…埋め込みボルト、[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a box joint material at one end of a pile such as a steel pipe pile, and a pin joint material at the other end of a pile, and a box joint material and a pin joint material of adjacent piles in the pile axis direction. And a stake that is configured so as to be freely connected to each other in a state where the stakes cannot be removed.
[0002]
[Prior art]
In the construction of building structures, the use of steel pipes is increasing. For example, steel pipe piles using steel pipes (steel pipe sheet piles) are connected in a columnar manner as a steel pipe pillar row soil retaining wall or a steel pipe pile supporting a building. Used.
As a mechanical joint for these steel pipe sheet piles and steel pipe piles, elasticity is provided in the outward groove along the circumferential direction of the outer peripheral surface of the shaft (male) or the inward groove along the inner peripheral surface of the cylinder (female). There is known a ring-type joint in which a ring key is fitted so as to straddle an inward groove and an outward groove. (See Patent Document 1)
There is also known a threaded joint including a steel pipe pile main body having a female threaded joint at an end and a steel pipe pile main body having a threaded joint at an end. (See Patent Document 2)
However, conventional steel pipe pile joints, such as a ring joint and a thread joint, have a problem that the joining time is extremely long.
[0003]
Patent Document 1 JP 2000-290997 A Patent Document 2 JP 11-6145 A
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem in connection of a conventional pile, and a first object of the present invention is to shorten a joining time of a joint of a pile.
A second object is to make it possible to freely insert and remove the joint portion of the pile.
A third object is to prevent the joint portion from coming out even if bending is applied to the joint portion of the pile.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 is a pile having a box joint material or a pin joint material at an end of a longitudinal joint device including a box joint material and a pin joint material that can be fitted to each other, and a circumferential direction of the box joint material. Forming a concave portion along the circumferential direction corresponding to the concave portion on the outer peripheral surface portion of the pin joint material, and forming a slit in the pin joint material in the longitudinal direction; A stake characterized in that a projection of a pin joint material is fitted into the recess of the material.
[0006]
According to the first aspect of the present invention, by forming a slit in the longitudinal direction of the pin joint material, the pin joint material can be radially expanded and contracted within an elastic range, and the pin joint material is pushed into the box joint material. Thus, the pin joint material shrinks due to the slit, and then expands, and the protrusion of the pin joint material and the recess of the box joint material are engaged with one touch, so that the joining time can be shortened.
[0007]
The invention according to claim 2 is a pile in which a plurality of convex portions and corresponding concave portions of the pin joint material are provided, and the convex portion toward the tip is formed into a convex portion that becomes longer in the longitudinal direction.
[0008]
According to the second aspect of the present invention, the convex portion that is larger in the longitudinal direction as near the tip end fits smoothly without being stuck in the concave portion.
[0009]
The invention according to claim 3 is a pile provided with a corner portion that is easy to be inserted into the convex portion of the pin joint material.
[0010]
According to the third aspect of the present invention, the pin joint material can be easily inserted into the box joint material by the easily insertable corner portion provided in the convex portion of the pin joint material.
[0011]
The invention according to claim 4 is a pile provided with means for engaging and disengaging with the pin joint material on an outer peripheral surface of the box joint material.
[0012]
According to the fourth aspect of the present invention, the locking means can prevent the box joint material and the pin joint material from rotating, and can also be pulled out.
[0013]
The invention according to claim 5 is a pile having a configuration in which a bolt is provided on an outer peripheral surface of the box joint material and a convex portion of the pin joint material is pressed.
[0014]
According to the invention according to claim 5, the box joint member and the pin joint member can be inserted and removed by bolts, and when a foreign object or the like is caught between the joints that fit together, the pin joint member is removed from the box joint member. Remove and re-engage the pin joint material with the box joint material.
[0015]
In the invention according to claim 6, an arc-shaped projection is formed on the inside of the upper end of the box joint material, and a tenon hole is formed below, and the arc-shaped projection of the box joint material is fitted on the pin joint material. The mortise is a pile having a configuration in which arcuate projections are formed to fit into the mortise of the box joint material so that the box joint material and the pin joint material do not come off.
[0016]
According to the invention according to claim 6, even if a bending force is applied to the joint between the pin joint material and the box joint material, the pin joint material and the box joint material do not come off due to the arc-shaped projection and the tenon hole.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
1 is a perspective view illustrating a state before fitting a steel pipe pile according to the present invention, FIG. 2 is a perspective view illustrating a state during fitting of a steel pipe pile, and FIG. 3 is a perspective view illustrating a state after fitting. FIG. 4 is a front sectional view of the steel pipe pile after fitting.
An embodiment of the present invention will be described with reference to FIGS.
A cylindrical pin joint material (male portion) 3 is welded to the lower end of the upper steel pipe pile 1 to form a pile. On the outer peripheral surface of the pin joint member 3, a convex portion 3c is formed in the circumferential direction, and an appropriate number of slits 3a are formed from the lower end of the pin joint member 3. A detent bolt hole 3b is formed in the outer peripheral surface of the pin joint member 3.
In addition, when the detent bolt hole 3b is formed in the convex part 3c of the outer peripheral surface of the pin joint material 3, the detent bolt 4b is easily screwed into the bolt hole 3b.
[0018]
A cylindrical box joint member 4 is welded to the upper end of the lower steel pipe pile 2 to form a pile. On the inner peripheral surface of the box joint member 4, a concave portion 4c is formed by a circumferential groove.
The concave portion 4c is large enough to fit the convex portion 3c of the pin joint member 3.
A detent bolt 4b is provided on the outer peripheral surface of the box joint 4, and is screwed into a detent hole 3b formed in the projection 3c of the pin joint member 3 by screwing the detent bolt 4b.
[0019]
Next, a connection method will be described. As shown in FIG. 1, the pin joint material 3 is aligned with the pile axis at a position above the box joint material 4. The tip of the pin joint 3 is lowered to fit the box joint 4. (Fig. 2)
Further, when the pin joint member 3 is lowered, the diameter of the lower end of the pin joint member 3 is reduced by the slit 3a, the pin joint member 3 is fitted to the box joint member 4, and the projection 3c of the pin joint member 3 is disengaged. It fits into the recess 4c of the box joint material 4. (FIGS. 3 and 4) The pin joint member 3 can be engaged with the box joint member 4 with one touch.
When the pin joint material and the box joint material are reversed, the box joint material 4 is aligned with the pile axis at a position above the pin joint material, the tip of the box joint material 4 is lowered, and the pin joint material 3 Can be fitted.
[0020]
Next, a steel pipe pile according to a second embodiment of the present invention, which has a mechanism in which the box joint member 4 and the pin joint member 3 can be freely inserted and removed, will be described.
FIG. 5 is a schematic diagram for explaining a mechanism that can be freely inserted and removed.
The convex portion 3c formed on the outer peripheral surface of the pin joint material 3 is fitted and engaged with the concave portion 4c formed on the inner peripheral surface of the box joint material 4.
An embedding bolt 5 is provided on the outer peripheral surface of the box joint member 4, and the embedding bolt 5 is screwed into the box joint member 4 so that the embedding bolt 5 abuts on the projection 3 c of the pin joint member 3.
[0021]
When removing the pin joint member 3 from the box joint member 4, the detent bolt 4 b (FIG. 1) is pulled out, and the embedding bolt 5 is screwed in from the outer peripheral surface of the box joint member 4. Is pushed toward the inside of the steel pipe pile, the protrusion 3c of the pin joint member 3 and the concave portion 4c of the box joint member 4 are disengaged from each other.
In this state, the pin joint member 3 can be pulled out of the box joint member 4 by lifting the pin joint member 3.
[0022]
A retaining mechanism according to a third embodiment of the present invention will be described.
FIG. 6 is a schematic diagram for explaining the retaining mechanism.
An arc-shaped projection 4d is formed on the inner side of the upper end of the box joint member 4, an inward concave portion 4c is formed on the inner peripheral surface, and a mortise 4e is formed below the inward concave portion 4c. The pin joint member 3 has a tenon hole 3d into which the arc-shaped projection 4d of the box joint member 4 is fitted, a convex portion 3c fitted into the inward concave portion 4c of the box joint member 4, and a tenon of the box joint member 4. The arc-shaped projections 3e fitted into the holes 4e are formed so that the box joint member 4 and the pin joint member 3 do not come off.
Even if a bending force is applied to the joint between the pin joint member 3 and the box joint member 4, the joint does not come off because the respective projections and mortises are fitted.
The arc-shaped projection 4d of the box joint member 4 and the arc-shaped projection 3e of the pin joint member 3 may be cylindrical projections.
[0023]
A steel pipe pile having a mechanism for inserting a pin joint material 3 into a box joint material 4 according to a fourth embodiment of the present invention will be described.
FIG. 7 is a schematic diagram for explaining the insertion mechanism.
The protrusion 3c1 on the tip end side of the pin joint material 3 is formed larger in the longitudinal direction of the pile axis than the protrusion 3c on the pile body side. The length b in the pile axis center longitudinal direction of the recess 4c1 of the box joint material 4 corresponding to the protrusion 3c1 on the tip side is also the pile axis center length of the recess 4c of the box joint material corresponding to the protrusion 3c on the pile body side. It is formed longer than the length a in the direction.
When the pin joint 3 is inserted into the box joint 4, the protrusion 3 c 1 on the tip side of the pin joint 3 does not fit into the recess 4 c on the tip side of the box joint 4, but fits into the recess 4 c 1 on the pile body side. . Therefore, the pin joint member 3 and the box joint member 4 are smoothly fitted and engaged.
[0024]
A steel pipe pile having a mechanism for inserting a box joint member 4 and a pin joint member 3 according to a fifth embodiment of the present invention will be described.
FIG. 8 is a schematic view for explaining the insertion mechanism.
The projection 3c formed on the outer peripheral surface of the pin joint member 3 is fitted into the concave portion 4c formed on the inner peripheral surface of the box joint member 4. When a corner portion 4f that can be easily inserted into the corner portion of the convex portion 3c of the pin joint material 3 is formed, even if the corner portion of the concave portion 4c of the box joint 4 contacts the corner portion 4f, the pin joint material 3 is attached to the box joint material 4. Can be easily inserted.
Note that the corner portion has a configuration that can be easily inserted, for example, a tapered portion or an arc portion.
[0025]
【The invention's effect】
Advantages corresponding to claims 1 to 4: The piles can be connected with one touch to connect them, it is simple, and the working time is very short.
[0026]
According to the second aspect of the present invention, the pin joint material and the box joint material do not fit into the longitudinally large convex portion on the distal end side of the pin joint material in the small concave portion on the distal end side of the box joint material. Are fitted and engaged smoothly.
[0027]
According to the third aspect, the pin joint material can be easily inserted into the box joint material by the easily insertable corner portion provided in the convex portion of the pin joint material.
[0028]
According to the fourth aspect, the box joint member and the pin joint member can be prevented from rotating by the locking means, and can be pulled out.
[0029]
Advantageous Effects According to Claim 5: When foreign matter or the like is caught in the joint between the box joint material and the pin joint material, the joint can be removed, the foreign matter can be removed, and the joint can be performed again.
In addition, since the joint portion can be removed, the centering of the rotation stop bolt becomes easy.
[0030]
Advantageous Effects According to Claim 6: Even if a bending force is applied to the joint between the pin joint material and the box joint material, the pin joint material does not come off due to the mortise.
[Brief description of the drawings]
FIG. 1 is a perspective view illustrating a pile joint according to the present invention before a box joint member and a pin joint member are fitted to each other.
FIG. 2 is a perspective view for explaining a fitting state of a box joint member and a pin joint member of the pile according to the present invention.
FIG. 3 is a perspective view illustrating a box joint material and a pin joint material of the pile according to the present invention after fitting.
FIG. 4 is a front sectional view of the pile shown in FIG. 3;
FIG. 5 is a schematic diagram illustrating a second embodiment of the present invention.
FIG. 6 is a schematic diagram illustrating a third embodiment of the present invention.
FIG. 7 is a schematic diagram illustrating a fourth embodiment of the present invention.
FIG. 8 is a schematic diagram illustrating a fifth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Upper pile, 2 ... Lower pile, 3 ... Pin joint material, 3a ... Slit, 3b ... Detent hole, 3c ... Convex part, 3d ... Mortise hole, 3e ... Projection, 4 ... Box joint material, 4b ... Detent Bolt, 4c: recess, 4d: protrusion, 4e: mortise, 5: embedded bolt,
