JP4825047B2 - Joint structure and joint parts of rotary press-fit pile steel pipes - Google Patents

Joint structure and joint parts of rotary press-fit pile steel pipes Download PDF

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JP4825047B2
JP4825047B2 JP2006126190A JP2006126190A JP4825047B2 JP 4825047 B2 JP4825047 B2 JP 4825047B2 JP 2006126190 A JP2006126190 A JP 2006126190A JP 2006126190 A JP2006126190 A JP 2006126190A JP 4825047 B2 JP4825047 B2 JP 4825047B2
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steel pipe
pile
joint
shaft body
chuck
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JP2007297833A (en
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将憲 菅
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Daiwa House Industry Co Ltd
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本発明は、杭用鋼管等のパイプ材同士のジョイント構造及びジョイント部品に関する。   The present invention relates to a joint structure and joint parts between pipe members such as pile steel pipes.

杭として鋼管杭を用い、下杭の上に上杭をジョイントしながら地面に打ち込んでいくような場合の上下の鋼管杭のジョイント方法として、地面に打ち込んだ下鋼管杭の上端部に上鋼管杭の下端部を現場溶接でジョイントしたり、あるいは、予め工場などで鋼管杭の端部に溶接で取り付けておいたネジ式等の継ぎ手同士を現場で螺合等することにより鋼管杭同士をジョイントすることは、従来より行われている。
特開２００１−０６４９５９号公報 As a method of joining the upper and lower steel pipe piles when using a steel pipe pile as the pile and driving it into the ground while joining the upper pile on the lower pile, the upper steel pipe pile at the upper end of the lower steel pipe pile driven into the ground The steel pipe piles can be joined together by jointing the lower end of the pipe by on-site welding, or by screwing together the screw-type joints that have been welded to the end of the steel pipe pile in advance at the factory, etc. This has been done conventionally.
JP 2001-064959 A

しかしながら、溶接は、現場溶接であるか工場溶接であるかにかかわらず、専門の知識と技能が必要であると共に、品質管理の徹底も行わなければならず、厄介であるという問題がある。   However, regardless of whether the welding is a field welding or a factory welding, there is a problem that specialized knowledge and skill are required, and thorough quality control must be performed, which is troublesome.

本発明は、上記のような問題点に鑑み、杭用鋼管同士を溶接によらずに容易にジョイントすることができる杭用鋼管同士のジョイント構造等を提供することを課題とする。   This invention makes it a subject to provide the joint structure of the steel pipes for piles etc. which can be easily joined without relying on welding in view of the above problems.

上記の課題は、杭用鋼管同士をジョイントするジョイント部品が備えられ、
該ジョイント部品は、一方の杭用鋼管の端部内方に嵌合される嵌合部と、もう一方の杭用鋼管の端部内方に嵌合される嵌合部とを備え、
各嵌合部は、両嵌合部に共通の軸体と、軸体の周囲に周設され、杭用鋼管の端部内周面を内周チャックする周方向に複数のチャック体と、軸体と各チャック体との相対回転により各チャック体を半径線方向外方に動作させるカム機構とを備え、
ジョイント部品の各嵌合部は、該嵌合部を杭用鋼管の端部内方に嵌合し、軸体と各チャック体とを相対回転させて各チャック体を半径線方向外方に動作させ杭用鋼管の端部内周面に押圧状態に当接させることで、各チャック体と杭用鋼管の端部内周面との摩擦力で、各杭用鋼管の端部と結合一体化されていることを特徴とする杭用鋼管同士のジョイント構造によって解決される。 The above-mentioned problem is provided with a joint component for jointing steel pipes for piles,
The joint component includes a fitting portion that is fitted inside an end portion of one pile steel pipe, and a fitting portion that is fitted inside an end portion of the other pile steel pipe,
Each fitting part has a shaft body common to both fitting parts, a plurality of chuck bodies in the circumferential direction that are provided around the shaft body and chuck the inner peripheral surface of the end portion of the pile steel pipe, and the shaft body And a cam mechanism that moves each chuck body radially outward by relative rotation with each chuck body,
Each fitting part of the joint part is fitted to the inside of the end of the steel pipe for pile, and the shaft body and each chuck body are rotated relative to each other to move each chuck body outward in the radial line direction. By bringing the end inner peripheral surface of the pile steel pipe into contact with the end state in a pressed state, the friction force between each chuck body and the end inner peripheral surface of the pile steel pipe is combined and integrated with the end of each pile steel pipe. This is solved by the joint structure between steel pipes for piles.

このジョイント構造では、ジョイント部品の一方の嵌合部と一方の杭用鋼管の端部とが軸体とチャック体との相対回転により結合一体化されると共に、ジョイント部品のもう一方の嵌合部ともう一方の杭用鋼管の端部とが軸体とチャック体との相対回転により結合一体化されることにより、杭用鋼管同士がジョイントされているので、ジョイント部に溶接部はなく、杭用鋼管への嵌合部の嵌合と、軸体とチャック体との相対回転だけで、杭用鋼管同士を容易にジョイントすることができる。   In this joint structure, one fitting part of the joint part and one end of the steel pipe for pile are combined and integrated by relative rotation of the shaft body and the chuck body, and the other fitting part of the joint part is integrated. And the other end of the steel pipe for piles are joined and integrated by relative rotation of the shaft body and the chuck body, so the steel pipes for piles are joined together, so there is no weld in the joint, The pile steel pipes can be easily joined to each other only by fitting the fitting part to the steel pipe and relative rotation between the shaft body and the chuck body.

上記のジョイント構造において、一方の杭用鋼管に対するジョイント部品の結合一体化の回転方向と、該ジョイント部品に対するもう一方の杭用鋼管の結合一体化の回転方向とが一致しているとよい。この場合は、一方の杭用鋼管とジョイント部品との結合一体化のための回転の際に、もう一方の杭用鋼管とジョイント部品との結合一体化に緩みを生じるおそれがなく、ジョイント部品と各杭用鋼管とを容易に結合一体化することができる。   In the above joint structure, it is preferable that the rotation direction of the joint integration of the joint part with one pile steel pipe and the rotation direction of the joint integration of the other pile steel pipe with respect to the joint part coincide with each other. In this case, there is no risk of loosening in the coupling and integration of the other pile steel pipe and the joint component during rotation for coupling and integration of one pile steel pipe and the joint component. Each pile steel pipe can be easily combined and integrated.

軸体と各チャック体とが逆回りするのを阻止する逆回り阻止手段が備えられているのもよい。この場合は、ジョイント部品と各杭用鋼管とを一旦一体化させるとその後に緩みを生じることがないのはもとより、例えば回転圧入式で杭を打っていくような場合において、その杭打ちの過程で、鋼管杭を正転させても逆転させても、ジョイント部の結合一状態に緩みを生じてしまうことがなく、杭を、上下させながら適正に地面に打ち込んでいくことができる。   There may be provided a reverse rotation preventing means for preventing the shaft body and each chuck body from rotating in the reverse direction. In this case, once the joint parts and steel pipes for each pile are integrated, not only will there be no looseness after that, but in the case where the pile is driven by a rotary press-fitting method, for example, Thus, even if the steel pipe pile is rotated forward or backward, the joint portion of the joint portion is not loosened, and the pile can be driven into the ground appropriately while being moved up and down.

この逆回り阻止手段が、軸体とチャック体との間に設けられたラチェット機構からなる場合は、嵌合部と杭用鋼管の端部とを軸体とチャック体との相対回転により結合一体化させれば、同時に、逆回り阻止状態が形成され、逆回り阻止状態を容易に形成することができる。   When the reverse rotation prevention means is composed of a ratchet mechanism provided between the shaft body and the chuck body, the fitting portion and the end of the steel pipe for pile are coupled and integrated by relative rotation of the shaft body and the chuck body. At the same time, the reverse rotation prevention state is formed at the same time, and the reverse rotation prevention state can be easily formed.

また、本発明は、杭用鋼管等のパイプ材同士をジョイントするジョイント部品であって、
一方のパイプ材の端部内部に嵌合される嵌合部と、もう一方のパイプ材の端部内部に嵌合される嵌合部とを備え、
各嵌合部は、両嵌合部に共通の軸体と、軸体の周囲に周設され、パイプ材の端部内周面を内周チャックする周方向に複数のチャック体と、軸体と各チャック体との相対回転により各チャック体を半径線方向外方に動作させるカム機構とを備え、
各嵌合部は、該嵌合部をパイプ材の端部内方に嵌合し、軸体と各チャック体とを相対回転させて各チャック体を半径線方向外方に動作させパイプ材の端部内周面に押圧状態に当接させることによって、各チャック体とパイプ材の端部内周面との摩擦力で、パイプ材の端部に結合一体化されるようになされていることを特徴とするパイプ材同士のジョイント部品を含む。 Moreover, the present invention is a joint component for jointing pipe materials such as steel pipes for piles,
A fitting portion fitted inside the end portion of one pipe material, and a fitting portion fitted inside the end portion of the other pipe material,
Each fitting portion includes a shaft body common to both the fitting portions, a plurality of chuck bodies in a circumferential direction that are provided around the shaft body and chuck the inner peripheral surface of the end portion of the pipe material, and the shaft body. A cam mechanism that moves each chuck body radially outward by relative rotation with each chuck body;
Each fitting portion is fitted to the inside of the end portion of the pipe material, and the shaft body and each chuck body are relatively rotated to move each chuck body outward in the radial line direction. By being brought into contact with the inner peripheral surface of the part in a pressed state, the frictional force between each chuck body and the inner peripheral surface of the end of the pipe member is combined and integrated with the end of the pipe member. It includes joint parts between pipe materials to be used.

更に、本発明は、パイプ材同士をジョイントするジョイント部品が備えられ、
該ジョイント部品は、一方のパイプ材の端部内方に嵌合される嵌合部と、もう一方のパイプ材の端部内方に嵌合される嵌合部とを備え、
各嵌合部は、両嵌合部に共通の軸体と、軸体の周囲に周設され、パイプ材の端部内周面を内周チャックする周方向に複数のチャック体と、軸体と各チャック体との相対回転により各チャック体を半径線方向外方に動作させるカム機構とを備え、
各嵌合部は、該嵌合部をパイプ材の端部内方に嵌合し、軸体と各チャック体とを相対回転させて各チャック体を半径線方向外方に動作させパイプ材の端部内周面に押圧状態に当接させることで、各チャック体とパイプ材の端部内周面との摩擦力で、各パイプ材の端部と結合一体化されていることを特徴とするパイプ材同士のジョイント構造を含む。 Furthermore, the present invention is provided with a joint component for jointing pipe materials,
The joint component includes a fitting portion fitted inside the end portion of one pipe material, and a fitting portion fitted inside the end portion of the other pipe material,
Each fitting portion includes a shaft body common to both the fitting portions, a plurality of chuck bodies in a circumferential direction that are provided around the shaft body and chuck the inner peripheral surface of the end portion of the pipe material, and the shaft body. A cam mechanism that moves each chuck body radially outward by relative rotation with each chuck body;
Each fitting portion is fitted to the inside of the end portion of the pipe material, and the shaft body and each chuck body are relatively rotated to move each chuck body outward in the radial line direction. A pipe material characterized in that it is combined and integrated with the end portion of each pipe material by a frictional force between each chuck body and the inner peripheral surface of the end portion of the pipe material by being brought into contact with the inner peripheral surface of the portion in a pressed state. Includes a joint structure between each other.

即ち、これらのジョイント部品及びジョイント構造では、杭用鋼管等の各種パイプ材同士を溶接によらずに容易にジョイントすることができる。   That is, in these joint parts and joint structures, various pipe materials such as steel pipes for piles can be easily joined without welding.

本発明は、以上のとおりのものであるから、杭用鋼管同士を溶接によらずに容易にジョイントすることができるし、また、杭用鋼管以外の各種パイプ材同士であっても溶接によらずに容易にジョイントすることができる。   Since the present invention is as described above, the steel pipes for piles can be easily joined without welding, and various pipe materials other than the steel pipe for piles can be joined together by welding. Can be easily jointed.

次に、本発明の実施最良形態を図面に基づいて説明する。   Next, the best mode for carrying out the present invention will be described with reference to the drawings.

図１〜図４に示す実施形態のジョイント構造において、１，１はパイプ材としての上下の杭用鋼管、２はジョイント部品である。   In the joint structure of the embodiment shown in FIGS. 1 to 4, 1 and 1 are upper and lower pile steel pipes as pipe materials, and 2 is a joint part.

ジョイント部品２は、一方の杭用鋼管１の端部内方に嵌合される嵌合部３と、もう一方の杭用鋼管の端部内方に嵌合される嵌合部３とを備えており、各嵌合部３，３は、両嵌合部３，３に共通の軸体４と、軸体４の周囲に周設され、杭用鋼管１の端部内周面を内周チャックする周方向に複数、本実施形態では４つのチャック体５…とを備えている。   The joint component 2 includes a fitting portion 3 that is fitted inside the end portion of one pile steel pipe 1 and a fitting portion 3 that is fitted inside the end portion of the other steel pipe for pile. Each of the fitting parts 3 and 3 is provided around the shaft body 4 common to both the fitting parts 3 and 3 and the periphery of the shaft body 4, and the inner periphery chucks the inner peripheral surface of the end portion of the pile steel pipe 1. A plurality of chuck bodies 5 in this embodiment are provided in the direction.

各嵌合部３における４つのチャック体５…は、図２に示すように、軸体４の外周部に設けられた環状溝４ａ内に配置されて上下方向に位置ずれをしないように保持されていると共に、これら４つのチャック体５は、図１（イ）に示すように、弾性伸縮可能なバンド６で束ねられて軸体４の外周溝部４ａ内に保持されている。バンド６は、各チャック体５の外周部に設けられた溝５ａ内に通され、該バンド６が、チャック体５と杭用鋼管１との当接の妨げとなるような突出をしないようにされている。また、軸体４には、嵌合部３，３間の位置において、杭用鋼管１の周壁の端面に支承させるつば部４ｂが備えられている。   As shown in FIG. 2, the four chuck bodies 5 in each fitting part 3 are arranged in an annular groove 4a provided in the outer peripheral part of the shaft body 4 and are held so as not to be displaced in the vertical direction. At the same time, these four chuck bodies 5 are held together in an outer peripheral groove portion 4a of the shaft body 4 by being bundled by a band 6 capable of elastic expansion and contraction, as shown in FIG. The band 6 is passed through a groove 5 a provided on the outer peripheral portion of each chuck body 5 so that the band 6 does not protrude so as to prevent the chuck body 5 and the pile steel pipe 1 from coming into contact with each other. Has been. In addition, the shaft body 4 is provided with a collar portion 4 b that is supported on the end surface of the peripheral wall of the pile steel pipe 1 at a position between the fitting portions 3 and 3.

そして、各嵌合部３には、軸体４と各チャック体５…との相対回転により各チャック体５…を半径線方向外方に動作させるカム機構７が備えられている。即ち、図１（ロ）に示すように、軸体４は、軸体中心位置から偏心した位置を曲率中心する周方向に４つの円弧状部４ｃ…を外周部に備えると共に、各チャック体５の内周部５ｃは、軸体４の各円弧状部４ｃ…に沿う円弧状をしており、図４（イ）に示すように、軸体４と各チャック体５…とが相対回転をすると、各チャック体５…の円弧内周部５ｃが軸体４の外周円弧状部４ｃ…に押されて各チャック体５…が半径線方向の外方に動作するようになされている。   Each fitting portion 3 is provided with a cam mechanism 7 that moves each chuck body 5 outward in the radial direction by relative rotation between the shaft body 4 and each chuck body 5. That is, as shown in FIG. 1 (b), the shaft body 4 includes four arcuate portions 4c in the circumferential direction centering the curvature at a position eccentric from the center position of the shaft body, and each chuck body 5 The inner peripheral portion 5c has an arc shape along each arc-shaped portion 4c of the shaft body 4, and the shaft body 4 and each chuck body 5 rotate relative to each other as shown in FIG. Then, the circular arc inner peripheral portion 5c of each chuck body 5 is pushed by the outer peripheral arc-shaped portion 4c of the shaft body 4 so that the chuck bodies 5 are moved outward in the radial direction.

更に、本実施形態のジョイント部品２には、軸体４と各チャック体５…とが逆回りするのを阻止する逆回り阻止手段が備えられ、該逆回り阻止手段は、図１（ハ）に示すように、軸体側の各円弧状部４ｃに設けられたラチェット歯８ａと、各チャック体の円弧状内周部５ｃに設けられたラチェット歯８ｂとによるラチェット機構８からなっていて、各チャック体５…を半径線方向の外方に動作させる軸体４とチャック体５…との相対回転は許容され、その逆の方向の相対回転はラチェット歯８ａ，８ｂ同士のかみ合いによって阻止されるようになされている。   Further, the joint component 2 of the present embodiment is provided with a reverse rotation prevention means for preventing the shaft body 4 and the chuck bodies 5 from rotating in the reverse direction. The reverse rotation prevention means is shown in FIG. The ratchet mechanism 8 is composed of ratchet teeth 8a provided on each arcuate part 4c on the shaft body side and ratchet teeth 8b provided on the arcuate inner peripheral part 5c of each chuck body. Relative rotation between the shaft body 4 and the chuck body 5 for moving the chuck bodies 5 outward in the radial direction is allowed, and relative rotation in the opposite direction is prevented by the engagement of the ratchet teeth 8a and 8b. It is made like that.

杭用鋼管１，１は、上記のジョイント部品２を用いて次のようにジョイントされる。即ち、ジョイント部品２の一方の嵌合部３を一方の杭用鋼管１の端部内方に嵌合した状態にした後、軸体４とチャック体５…とを相対回転させれば、カム機構７によって各チャック体５…は半径線方向外方に動き、各チャック体５…の外周部が前記一方の杭用鋼管１の端部内周面に当接して押し付け状態となり、各チャック体５…と杭用鋼管１の端部内周面との摩擦力で、ジョイント部品２と該一方の杭用鋼管１とが結合一体化される。また、ジョイント部品２のもう一方の嵌合部３をもう一方の杭用鋼管１の端部内方に嵌合した状態にした後、軸体４とチャック体５…とを相対回転させれば、カム機構７によって各チャック体５…は半径線方向外方に動き、各チャック体５…の外周部が前記もう一方の杭用鋼管１の端部内周面に当接して押し付け状態となり、各チャック体５…と杭用鋼管１の端部内周面との摩擦力で、ジョイント部品２と該もう一方の杭用鋼管１とが結合一体化される。こうして杭用鋼管１，１同士がジョイント部品２でジョイントされる。   The steel pipes 1 and 1 for piles are jointed as follows using the joint component 2 described above. That is, if one fitting part 3 of the joint part 2 is fitted to the inside of the end part of one pile steel pipe 1, the shaft body 4 and the chuck body 5. 7, the chuck bodies 5... Move outward in the radial direction, and the outer peripheral portions of the chuck bodies 5 are brought into contact with the inner peripheral surface of the end of the one pile steel pipe 1 to be pressed. The joint component 2 and the one pile steel pipe 1 are combined and integrated by the frictional force between the end portion and the inner peripheral surface of the pile steel pipe 1. Moreover, after making the other fitting part 3 of the joint component 2 fit in the end inner side of the other pile steel pipe 1, if the shaft body 4 and the chuck body 5 are relatively rotated, Each chuck body 5 is moved radially outward by the cam mechanism 7, and the outer peripheral portion of each chuck body 5 is in contact with the inner peripheral surface of the end of the other pile steel pipe 1 to be pressed. The joint component 2 and the other pile steel pipe 1 are coupled and integrated by the frictional force between the body 5 and the end inner peripheral surface of the pile steel pipe 1. In this way, the steel pipes 1 and 1 for piles are joined by the joint component 2.

軸体４とチャック体５…との相対回転は、種々の方法で行われてよい。例えば、地面に打ち込まれた下杭用鋼管の上端部に上杭用鋼管をジョイントする場合は、下杭用鋼管１の上端部内方にジョイント部品２の下嵌合部３を嵌合し、該ジョイント部品２のつば部を下杭用鋼管１の上端で支承保持させ、その状態で、ジョイント部品の軸体４に回転力を付与することによって軸体４とチャック体５…とを相対回転させて下杭用鋼管１とジョイント部品２とを結合一体化し、しかる後、上杭用鋼管１の下端内方にジョイント部品２の上嵌合部３を嵌合し、上杭用鋼管１を回転させることで上嵌合部３のチャック体５…を追従回転させて軸体４とチャック体５…とを相対回転させ、上杭用鋼管１とジョイント部品２とを結合一体化するというようにして行うことができる。   The relative rotation between the shaft body 4 and the chuck bodies 5 may be performed by various methods. For example, when an upper pile steel pipe is jointed to the upper end of a lower pile steel pipe driven into the ground, the lower fitting portion 3 of the joint component 2 is fitted inside the upper pile of the lower pile steel pipe 1, The flange part of the joint part 2 is supported and held by the upper end of the lower pile steel pipe 1, and in this state, the shaft body 4 and the chuck body 5 are rotated relative to each other by applying a rotational force to the shaft body 4 of the joint part. Then, the lower pile steel pipe 1 and the joint part 2 are combined and integrated, and then the upper fitting portion 3 of the joint part 2 is fitted inside the lower end of the upper pile steel pipe 1 to rotate the upper pile steel pipe 1. By doing so, the chuck body 5 of the upper fitting portion 3 is rotated to follow and the shaft body 4 and the chuck body 5 are rotated relative to each other so that the upper pile steel pipe 1 and the joint component 2 are combined and integrated. Can be done.

特に、下杭用鋼管１に対するジョイント部品２の結合一体化の回転方向と、該ジョイント部品２に対する上杭用鋼管１の結合一体化の回転方向とが一致しているとよく、本実施形態ではそのようになされていて、その場合は、上杭用鋼管１を回転させてジョイント部品２と結合一体化させようとする際に、下杭用鋼管１とジョイント部品２との結合に緩みを生じてしまうおそれがなく、上下の杭用鋼管１，１をしっかりと容易にジョイントすることができる。   In particular, the rotation direction of the joint integration of the joint part 2 with respect to the lower pile steel pipe 1 and the rotation direction of the connection integration of the upper pile steel pipe 1 with respect to the joint part 2 are preferably matched. In that case, when the upper pile steel pipe 1 is rotated to be coupled and integrated with the joint part 2, the lower pile steel pipe 1 and the joint part 2 are loosened. The upper and lower pile steel pipes 1 and 1 can be firmly and easily joined.

また、下杭用鋼管１に対するジョイント部品２の結合一体化の回転方向と、該ジョイント部品２に対する上杭用鋼管１の結合一体化の回転方向とが逆である場合であっても、ラチェット機構８の働きによって、下杭用鋼管１とジョイント部品２との結合に緩みを生じることはなく、上下の杭用鋼管１，１をしっかりと容易にジョイントすることができる。   Even if the rotation direction of the joint integration of the joint part 2 to the lower pile steel pipe 1 and the rotation direction of the connection integration of the upper pile steel pipe 1 to the joint part 2 are opposite, the ratchet mechanism By the action of 8, the connection between the lower pile steel pipe 1 and the joint component 2 is not loosened, and the upper and lower pile steel pipes 1, 1 can be firmly and easily joined.

また、上記のように、下杭用鋼管１に対するジョイント部品２の結合一体化の回転方向と、該ジョイント部品２に対する上杭用鋼管の結合一体化の回転方向とが一致している場合は、下杭用鋼管１の上端部内方にジョイント部品２の下嵌合部３を嵌合し、該ジョイント部品２のつば部を下杭用鋼管１の上端で支承保持させ、次いで、上杭用鋼管１の下端部にジョイント部品２の上嵌合部３を嵌合し、しかる後、上杭用鋼管１に回転力を付与すれば、上下の杭用鋼管１，１はそれぞれジョイント部品２に対してしっかりと結合一体化され、杭用鋼管１，１同士を能率良くジョイントすることができる。   In addition, as described above, when the rotation direction of the joint integration of the joint part 2 with respect to the lower pile steel pipe 1 and the rotation direction of the connection integration of the upper pile steel pipe with respect to the joint part 2 match, The lower fitting part 3 of the joint part 2 is fitted inside the upper end part of the lower pile steel pipe 1, the collar part of the joint part 2 is supported and held at the upper end of the lower pile steel pipe 1, and then the upper pile steel pipe If the upper fitting part 3 of the joint component 2 is fitted to the lower end of 1 and then a rotational force is applied to the upper pile steel pipe 1, the upper and lower pile steel pipes 1 and 1 are respectively connected to the joint part 2. It is firmly connected and integrated, and the steel pipes 1 and 1 for piles can be jointed efficiently.

特に、杭が回転圧入式で地面に打ち込まれるものである場合は、回転圧入のための杭打ち機の回転機構を利用して上杭用鋼管を回転させることができ、上下の杭用鋼管の相対回転を容易に行うことができる。   In particular, when the pile is driven into the ground by rotary press-fitting, the upper pile steel pipe can be rotated using the rotation mechanism of the pile driving machine for rotary press-fitting. Relative rotation can be easily performed.

上記のジョイント部品２及びジョイント構造によれば、ジョイント部品２の一方の嵌合部３と一方の杭用鋼管１の端部とが軸体４とチャック体５との相対回転により結合一体化され、ジョイント部品２のもう一方の嵌合部３ともう一方の杭用鋼管１の端部も軸体４とチャック体５との相対回転により結合一体化されることで、杭用鋼管１，１同士がジョイントされるので、杭用鋼管１，１同士のジョイント部に溶接部はなく、杭用鋼管１，１への嵌合部３，３の嵌合操作と、軸体４とチャック体５…との相対回転操作を行うだけで、杭用鋼管１，１同士を容易にジョイントすることができる。   According to the joint component 2 and the joint structure described above, the one fitting portion 3 of the joint component 2 and the end of the one pile steel pipe 1 are coupled and integrated by the relative rotation of the shaft body 4 and the chuck body 5. The other fitting part 3 of the joint part 2 and the end part of the other pile steel pipe 1 are also coupled and integrated by the relative rotation of the shaft body 4 and the chuck body 5, so that the pile steel pipes 1, 1 Since the joints between the pile steel pipes 1 and 1 are not welded to each other, there is no welded part, the fitting operation of the fitting parts 3 and 3 to the pile steel pipes 1 and 1, the shaft body 4 and the chuck body 5 The steel pipes 1 and 1 for piles can be easily jointed only by performing relative rotation operation with.

また、軸体４と各チャック体５…とはラチェット機構８により逆回りするのを阻止されるようになされているので、杭打ちの過程で、鋼管杭を正転させても逆転させても、ジョイント部の結合一状態に緩みを生じてしまうことがなく、杭を、上下させながら適正に地面に打ち込んでいくことができる。   Further, since the shaft body 4 and the chuck bodies 5 are prevented from rotating in reverse by the ratchet mechanism 8, the steel pipe pile can be rotated forward or backward during the pile driving process. The pile can be driven into the ground properly while moving up and down without causing any looseness in the joint state of the joint part.

特に、逆回り阻止手段としてラチェット機構８を採用しているので、嵌合部３と杭用鋼管１の端部とを軸体４とチャック体５との相対回転により結合一体化させれば、同時に、逆回り阻止状態が形成され、逆回り阻止状態を容易に形成することができる。   In particular, since the ratchet mechanism 8 is employed as the reverse rotation prevention means, if the fitting portion 3 and the end portion of the pile steel pipe 1 are combined and integrated by relative rotation of the shaft body 4 and the chuck body 5, At the same time, the reverse rotation prevention state is formed, and the reverse rotation prevention state can be easily formed.

以上に、本発明の実施形態を示したが、本発明はこれに限られるものではなく、発明思想を逸脱しない範囲で各種の変更が可能である。例えば、上記の実施形態では、逆回り阻止手段としてラチェット機構８を用いた場合を示したが、ラチェット機構によらずに、孔にピンを差し込む形式などによって逆回りが阻止されるようになされていてもよい。   Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described embodiment, the case where the ratchet mechanism 8 is used as the reverse rotation prevention means has been described. However, the reverse rotation is prevented by a type in which a pin is inserted into the hole without using the ratchet mechanism. May be.

また、上記の実施形態では、逆回り阻止手段が備えられている場合を示したが、杭打ちの過程で杭を逆転させる必要がなく、しかも、一方の杭用鋼管に対するジョイント部品の結合一体化の回転方向と、該ジョイント部品に対するもう一方の杭用鋼管の結合一体化の回転方向とが一致していてその方向に回転させながら杭を打っていくような場合であって、軸体とチャック体との摩擦力だけで充分な逆回り阻止状態が形成されるような場合などにおいては、逆回り阻止手段は省略されてもよい。   Moreover, in the above embodiment, the case where the reverse rotation prevention means is provided is shown, but it is not necessary to reverse the pile in the process of pile driving, and the joint part is integrated with the steel pipe for one pile. The rotation direction of the other pile steel pipe with respect to the joint part and the rotation direction of the integrated integration of the other pile pipe, and the pile is driven while rotating in that direction. In the case where a sufficient reverse rotation prevention state is formed only by the frictional force with the body, the reverse rotation prevention means may be omitted.

また、軸体４、チャック体５、チャック体５…を軸体４に保持する構造、カム機構７等の具体的形態に制限はなく、各種形態のものが採用されてよいし、チャック体５の具体的個数についても制限はない。   Further, the shaft body 4, the chuck body 5, the structure that holds the chuck bodies 5 to the shaft body 4, the specific form of the cam mechanism 7, etc. are not limited, and various forms may be adopted. There is no restriction on the specific number of the.

また、本発明は、回転圧入式で杭打ちを行っていく場合の杭用鋼管同士のジョイントに限らず、非回転式で杭打ちを行っていく場合の杭用鋼管同士のジョイントに用いられてもよい。   In addition, the present invention is not limited to a joint between pile steel pipes when performing pile driving with a rotary press-fitting type, and is used for a joint between steel pipes for pile when performing pile driving with a non-rotating type. Also good.

更に、上記の実施形態では、本発明を、杭用鋼管同士をジョイントする場合のジョイント構造とジョイント部品に適用した場合を示しているが、各種パイプ材同士のジョイントのためのジョイント構造及びジョイント部品として用いられてもよい。   Furthermore, in said embodiment, although the case where this invention is applied to the joint structure and joint component in the case of joining steel pipes for piles is shown, the joint structure and joint component for the joint of various pipe materials are shown. May be used as

実施形態のジョイント部品を示すもので、図（イ）は正面図、図（ロ）は図（イ）のＩ−Ｉ線断面図、図（ハ）は図（ロ）のＡ部拡大詳細図である。The joint component of embodiment is shown, A figure (I) is a front view, A figure (B) is II sectional view taken on the line of FIG. (A), A figure (C) is an A section enlarged detail view of a figure (B). It is. 同ジョイント部品を示すもので、図（イ）はバンドを取り外した状態の正面図、図（ロ）は軸体とチャック体とを分離させた状態の正面図である。FIG. 2A is a front view showing a state where the band is removed, and FIG. 2B is a front view showing a state where a shaft body and a chuck body are separated from each other. ジョイント部品と上下の杭用鋼管を分離させた状態の断面正面図である。It is a section front view in the state where the joint parts and the upper and lower pile steel pipes are separated. 上下の杭用鋼管がジョイントされた状態を示すもので、図（イ）は図（ロ）のＩＩ−ＩＩ線断面図、図（ロ）は断面正面図である。The upper and lower pile steel pipes are shown in a jointed state. FIG. (A) is a cross-sectional view taken along the line II-II of FIG.

符号の説明Explanation of symbols

１…杭用鋼管（パイプ材）
２…ジョイント部品
３…嵌合部
４…軸体
５…チャック体
７…カム機構
８…ラチェット機構 1 ... Steel pipe for piles (pipe material)
2 ... Joint parts 3 ... Fitting part 4 ... Shaft body 5 ... Chuck body 7 ... Cam mechanism 8 ... Ratchet mechanism

Claims (2)

杭用鋼管同士をジョイントするジョイント部品が備えられ、
該ジョイント部品は、一方の杭用鋼管の端部内方に嵌合される嵌合部と、もう一方の杭用鋼管の端部内方に嵌合される嵌合部とを備え、
各嵌合部は、両嵌合部に共通の軸体と、軸体の周囲に周設され、杭用鋼管の端部内周面を内周チャックする周方向に複数のチャック体と、軸体と各チャック体との相対回転により各チャック体を半径線方向外方に動作させるカム機構とを備え、
ジョイント部品の各嵌合部は、該嵌合部を杭用鋼管の端部内方に嵌合し、軸体と各チャック体とを相対回転させて各チャック体を半径線方向外方に動作させ杭用鋼管の端部内周面に押圧状態に当接させることで、各チャック体と杭用鋼管の端部内周面との摩擦力で、各杭用鋼管の端部と結合一体化され、
一方の杭用鋼管に対するジョイント部品の結合一体化の回転方向と、該ジョイント部品に対するもう一方の杭用鋼管の結合一体化の回転方向と、杭の回転圧入のための回転方向とが一致するようになされていると共に、
該結合一体化の回転方向と逆方向における軸体と各チャック体との相対回転を阻止する逆回り阻止手段が備えられ、
該逆回り阻止手段は、軸体の側に設けられたラチェット歯と、チャック体の側に設けられたラチェット歯とをかみ合い状態にしたラチェット機構からなって、前記結合一体化のための相対回転は許容され、その逆方向の相対回転はラチェット歯同士のかみ合いによって阻止されるようになされていることを特徴とする回転圧入式杭用鋼管同士のジョイント構造。 Joint parts that join steel pipes for piles are provided,
The joint component includes a fitting portion that is fitted inside an end portion of one pile steel pipe, and a fitting portion that is fitted inside an end portion of the other pile steel pipe,
Each fitting part has a shaft body common to both fitting parts, a plurality of chuck bodies in the circumferential direction that are provided around the shaft body and chuck the inner peripheral surface of the end portion of the pile steel pipe, and the shaft body And a cam mechanism that moves each chuck body radially outward by relative rotation with each chuck body,
Each fitting part of the joint part is fitted to the inside of the end of the steel pipe for pile, and the shaft body and each chuck body are rotated relative to each other to move each chuck body outward in the radial line direction. By bringing the end inner peripheral surface of the pile steel pipe into contact with the pressed state, the friction force between each chuck body and the end inner peripheral surface of the pile steel pipe is combined and integrated with the end of each pile steel pipe ,
The rotational direction of joint integration of the joint part with one pile steel pipe, the rotational direction of joint integration of the other pile steel pipe with respect to the joint part, and the rotational direction for rotational press-fitting of the pile are matched. As well as
A reverse rotation preventing means for preventing relative rotation between the shaft body and each chuck body in a direction opposite to the rotation direction of the combined integration is provided;
The reverse rotation prevention means comprises a ratchet mechanism in which the ratchet teeth provided on the shaft body side and the ratchet teeth provided on the chuck body side are engaged with each other, and the relative rotation for the coupling integration is performed. Is allowed, and the relative rotation in the opposite direction is prevented by the meshing of the ratchet teeth . The joint structure of rotary press-fit type steel pipes for piles . 杭用鋼管同士をジョイントするジョイント部品であって、
一方の杭用鋼管の端部内部に嵌合される嵌合部と、もう一方の杭用鋼管の端部内部に嵌合される嵌合部とを備え、
各嵌合部は、両嵌合部に共通の軸体と、軸体の周囲に周設され、杭用鋼管の端部内周面を内周チャックする周方向に複数のチャック体と、軸体と各チャック体との相対回転により各チャック体を半径線方向外方に動作させるカム機構とを備え、
各嵌合部は、該嵌合部を杭用鋼管の端部内方に嵌合し、軸体と各チャック体とを相対回転させて各チャック体を半径線方向外方に動作させ杭用鋼管の端部内周面に押圧状態に当接させることによって、各チャック体と杭用鋼管の端部内周面との摩擦力で、杭用鋼管の端部に結合一体化されるようになされており、
一方の杭用鋼管との結合一体化の回転方向と、もう一方の杭用鋼管の結合一体化の回転方向と、杭の回転圧入のための回転方向とが一致するようになされていると共に、
該結合一体化の回転方向と逆方向における軸体と各チャック体との相対回転を阻止する逆回り阻止手段が備えられ、
該逆回り阻止手段は、軸体の側に設けられたラチェット歯と、チャック体の側に設けられたラチェット歯とをかみ合い状態にしたラチェット機構からなって、前記結合一体化のための相対回転は許容され、その逆方向の相対回転はラチェット歯同士のかみ合いによって阻止されるようになされていることを特徴とする回転圧入式杭用鋼管同士のジョイント部品。 It is a joint part that joins steel pipes for piles ,
A fitting portion fitted inside the end portion of one pile steel pipe , and a fitting portion fitted inside the end portion of the other pile steel pipe ,
Each fitting part has a shaft body common to both fitting parts, a plurality of chuck bodies in the circumferential direction that are provided around the shaft body and chuck the inner peripheral surface of the end portion of the pile steel pipe , and the shaft body And a cam mechanism that moves each chuck body radially outward by relative rotation with each chuck body,
Each fitting part fits the fitting part inside the end of the steel pipe for pile , and rotates the shaft body and each chuck body to move each chuck body outward in the radial direction, thereby causing the steel pipe for pile to move. by abutting the pressed state in the end peripheral surface, a frictional force between the chuck body and the inner peripheral surface of an end portion of the pile steel pipe, are adapted to be integrally connected to an end portion of the pile for steel ,
The rotation direction of the combined integration with one pile steel pipe, the rotation direction of the combined integration of the other pile steel pipe, and the rotation direction for rotary press-fitting of the pile are made to coincide,
A reverse rotation preventing means for preventing relative rotation between the shaft body and each chuck body in a direction opposite to the rotation direction of the combined integration is provided;
The reverse rotation prevention means comprises a ratchet mechanism in which the ratchet teeth provided on the shaft body side and the ratchet teeth provided on the chuck body side are engaged with each other, and the relative rotation for the coupling integration is performed. Is allowed, and the relative rotation in the opposite direction is prevented by the meshing of the ratchet teeth . This is a joint part of rotary press-fit type steel pipes for piles .
JP2006126190A 2006-04-28 2006-04-28 Joint structure and joint parts of rotary press-fit pile steel pipes Expired - Fee Related JP4825047B2 (en)

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JP2001064959A (en) * 1999-08-31 2001-03-13 Daiwa House Ind Co Ltd Steel pipe pile using screw-type joint
JP3845604B2 (en) * 2001-08-24 2006-11-15 株式会社世古工務店 Plug for holding pile
JP2004218214A (en) * 2003-01-10 2004-08-05 Norio Moriya Rotary driver of steel pipe pile

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