JP6739300B2 - Steel pipe connection mechanism - Google Patents

Steel pipe connection mechanism Download PDF

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JP6739300B2
JP6739300B2 JP2016180798A JP2016180798A JP6739300B2 JP 6739300 B2 JP6739300 B2 JP 6739300B2 JP 2016180798 A JP2016180798 A JP 2016180798A JP 2016180798 A JP2016180798 A JP 2016180798A JP 6739300 B2 JP6739300 B2 JP 6739300B2
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steel pipe
groove portion
joint
key
opening
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JP2018044387A (en
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征 外山
征 外山
相和　明男
明男 相和
孝光 臼井
孝光 臼井
山本　浩之
浩之 山本
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Kubota Corp
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Description

本発明は、鋼管軸心方向に隣り合わされた鋼管の互いに対向する鋼管端部どうしを、鋼管周方向に沿って設けられたキー溝部に配置したキー部材によって前記鋼管軸心方向に抜け止め状態に連結する鋼管連結機構に関する。 The present invention, steel pipe end portions of steel pipes adjacent to each other in the axial direction of the steel pipe are opposed to each other by a key member arranged in a key groove portion provided along the circumferential direction of the steel pipe to prevent the steel pipe from coming off in the axial direction of the steel pipe. The present invention relates to a steel pipe connecting mechanism for connecting.

従来、特許文献１に示すように、二つの柱状体を略同一の軸心上で互いに抜き差し不能に接合する柱状体の接合構造であって、前記二つの柱状体のうち一方の柱状体に設けられた軸状継手部と、前記二つの柱状体のうち他方の柱状体に設けられ、前記軸状継手部に外嵌自在な筒状継手部と、前記軸状継手部の外周に前記軸心の周方向に沿って設けられた軸側キー溝と、前記筒状継手部の内周に前記周方向に沿って設けられるとともに、前記軸状継手部に前記筒状継手部を外嵌したときに前記軸側キー溝と対応する筒側キー溝と、前記軸側キー溝と前記筒側キー溝とにわたるように、前記筒状継手部の外側から前記軸心に直交する方向に沿って抜き差し自在なキーと、前記キーの抜き差し方向に直交する方向に沿って、前記軸状継手部及び筒状継手部のいずれか一方に形成された保持穴と、前記保持穴に対して回転させることなく抜き差し自在であって、前記キーの抜け出し側の端部に当接して前記キーの抜け出しを防止するピンと、を備えた柱状体の接合構造が提案されている。 Conventionally, as shown in Patent Document 1, there is provided a joining structure of columnar bodies in which two columnar bodies are joined to each other so that they cannot be pulled out from each other on substantially the same axis, and provided in one of the two columnar bodies. And a cylindrical joint portion provided on the other columnar body of the two columnar bodies and externally fitted to the shaft-like joint portion, and the shaft center on the outer periphery of the shaft-like joint portion. When the cylindrical joint portion is externally fitted to the axial joint portion while being provided along the circumferential direction on the shaft side key groove provided along the circumferential direction and on the inner circumference of the tubular joint portion. A cylindrical key groove corresponding to the shaft side key groove, and an insertion/removal along the direction orthogonal to the shaft center from the outside of the cylindrical joint portion so as to cover the shaft side key groove and the cylinder side key groove. A free key, a holding hole formed in either one of the shaft-like joint portion and the tubular joint portion along a direction orthogonal to the inserting/removing direction of the key, and without rotating with respect to the holding hole. A joint structure of a columnar body has been proposed which is detachable and attachable, and includes a pin that comes into contact with an end portion of the key on the side where the key comes out to prevent the key from coming out.

特許第４６３２９１１号公報Japanese Patent No. 4632911

上述した従来の接合構造は、鋼管周方向のうち開口部が備えられている部分は、該開口部が存在しているため鋼管軸心方向の剛性が低い。それにもかかわらず、各キーや、各キーの抜け止めを防止するピンによって、内向き周溝のうち開口部に対向する部分にも、内向き周溝のうち開口部が存在しない箇所において鋼管軸心方向の荷重を伝達するキーと同様に、鋼管軸心方向の荷重を伝達する構造となっているため、この部分において連携機構に変形を生じる虞があった。 In the above-described conventional joining structure, the portion of the steel pipe circumferential direction provided with the opening has low rigidity in the axial direction of the steel pipe because the opening is present. Nevertheless, due to each key and the pin that prevents the key from slipping out, the steel pipe shaft is not attached to the portion of the inward circumferential groove facing the opening in the portion of the inward circumferential groove where the opening does not exist. Similar to the key for transmitting the load in the axial direction, the structure for transmitting the load in the axial direction of the steel pipe has a risk of deforming the linkage mechanism at this portion.

本発明は上記実情に鑑みてなされたものであって、鋼管周方向に変形を生じない鋼管連結機構を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a steel pipe connecting mechanism that does not deform in the steel pipe circumferential direction.

上述の目的を達成するための、本発明の鋼管連結機構の特徴構成は、鋼管軸心方向に隣り合わされた鋼管の互いに対向する鋼管端部どうしを、鋼管周方向に沿って設けられたキー溝部に配置したキー部材によって前記鋼管軸心方向に抜け止め状態に連結する鋼管連結機構であって、前記キー溝部のうち前記鋼管周方向の少なくとも一部を外部空間に連通する開口部に、前記外部空間から前記開口部を介して前記キー溝部に配置された前記キー部材が、前記開口部を介して前記外部空間に抜け出ることを防止する蓋部材が取り付け可能であり、少なくとも、前記蓋部材及び前記キー部材のうち前記開口部に対向する前記キー溝部に存在する部分と、前記開口部に対向する前記キー溝部と、のいずれかに、前記鋼管軸心方向に荷重を伝達しない非伝達機構が備えられている点にある。 In order to achieve the above-mentioned object, the characteristic configuration of the steel pipe connecting mechanism of the present invention is that the steel pipe end portions of the steel pipes adjacent to each other in the steel pipe axial direction are opposed to each other, and the key groove portions are provided along the steel pipe circumferential direction. A steel pipe connecting mechanism for connecting the steel pipe in the axial direction of the steel pipe in a retaining state by a key member disposed in the opening, which communicates at least a part of the key groove portion in the steel pipe circumferential direction with an external space. A lid member for preventing the key member arranged in the key groove portion from the space from coming out of the space to the external space via the opening portion can be attached, and at least the lid member and the A non-transmission mechanism that does not transmit a load in the axial direction of the steel pipe is provided in any of the key groove portion facing the opening and the key groove portion facing the opening of the key member. There is a point.

少なくとも、蓋部材及びキー部材のうち開口部に対向するキー溝部に存在する部分と、開口部に対向するキー溝部と、のいずれか、すなわち、開口部が存在しているため鋼管周方向のうち剛性が低い箇所に対応する部分に、鋼管軸心方向の荷重を伝達しない非伝達機構を備えているため、鋼管軸心方向の荷重は該部分において伝達されず該部分に変形を生じる虞がない。 At least one of a portion of the lid member and the key member existing in the key groove portion facing the opening and a key groove portion facing the opening, that is, in the steel pipe circumferential direction due to the existence of the opening. Since the non-transmission mechanism that does not transmit the load in the axial direction of the steel pipe is provided in the portion corresponding to the portion having low rigidity, the load in the axial direction of the steel pipe is not transmitted in the portion, and there is no fear of deformation of the portion. ..

本発明においては、前記非伝達機構は、少なくとも、前記キー部材のうち前記開口部側の端部と、前記キー溝部のうち前記端部に対応する部分と、のいずれかにも備えられていると好適である。 In the present invention, the non-transmission mechanism is provided in at least one of the end portion of the key member on the opening side and the portion of the key groove portion corresponding to the end portion. Is suitable.

キー溝部のうち開口部に対応する部分のみならず、開口部との境界周りも、その他の部分にくらべて、鋼管軸心方向の剛性が低い。そこで、少なくとも、キー部材のうち開口部側の端部と、キー溝部のうちキー部材の端部に対応する部分にも非伝達機構を備えているため、鋼管軸心方向の荷重は該部分において伝達されず該部分に変形を生じる虞がない。 The rigidity of the key groove portion in the axial direction of the steel pipe is low not only in the portion corresponding to the opening, but also in the vicinity of the boundary with the opening as compared with other portions. Therefore, at least the end portion of the key member on the opening side and the portion of the key groove portion corresponding to the end portion of the key member are also provided with the non-transmission mechanism, so that the load in the axial direction of the steel pipe is at that portion. There is no risk that the portion will not be transmitted and will be deformed.

本発明においては、前記非伝達機構は、前記蓋部材及び前記キー部材のうち前記開口部に対向する前記キー溝部に存在する部分と、前記開口部に対向する前記キー溝部と、の非伝達部隙間から構成され、前記非伝達部隙間は、前記キー溝部のうち前記開口部と対向しない部分と、該部分に配置される前記キー部材との伝達部隙間よりも大きいと好適である。 In the present invention, the non-transmission mechanism is a non-transmission portion of a portion of the lid member and the key member that is present in the key groove portion that faces the opening, and the key groove portion that faces the opening. It is preferable that the non-transmission portion gap is configured to be larger than a transmission portion gap between a portion of the key groove portion that does not face the opening portion and the key member arranged in the portion.

非伝達部隙間は伝達部隙間より大きいため、鋼管軸心方向に作用する荷重は、キー溝部のうち開口部と対向しない部分と該部分に配置されるキー部材との接触により伝達される。なお、非伝達部隙間及び伝達部隙間の大小は、蓋部材、キー部材及びキー溝部の形状を異ならせることによって実現される。 Since the non-transmission portion gap is larger than the transmission portion gap, the load acting in the axial direction of the steel pipe is transmitted by the contact between the portion of the key groove portion that does not face the opening portion and the key member arranged in the portion. The sizes of the non-transmission portion gap and the transmission portion gap are realized by making the shapes of the lid member, the key member, and the key groove portion different.

本発明においては、前記非伝達機構は、少なくとも、前記蓋部材及び前記キー部材のうち前記開口部に対向する前記キー溝部に存在する部分、又は、前記開口部に対向する前記キー溝部のいずれかの非伝達部剛性から構成され、前記非伝達部剛性は、前記キー溝部のうち前記開口部と対向しない部分、及び、該部分に配置される前記キー部材の伝達部剛性よりも低いと好適である。 In the present invention, the non-transmission mechanism is at least a portion of the lid member and the key member that is present in the key groove portion that faces the opening portion, or one of the key groove portion that faces the opening portion. It is preferable that the non-transmission portion rigidity is lower than the non-transmission portion rigidity of the portion of the key groove portion that does not face the opening and the transmission portion rigidity of the key member arranged in the portion. is there.

非伝達部剛性は伝達部剛性よりも低い、すなわち伝達部剛性は非伝達部剛性よりも高いため、鋼管軸心方向に作用する荷重は、キー溝部のうち開口部と対向しない部分と、該部分に配置されるキー部材との接触により伝達される。なお、非伝達部剛性及び伝達部剛性の高低は、蓋部材、キー部材及びキー溝部の形状や、材質を異ならせることによって実現される。 Since the rigidity of the non-transmission portion is lower than the rigidity of the transmission portion, that is, the rigidity of the transmission portion is higher than the rigidity of the non-transmission portion, the load acting in the axial direction of the steel pipe is applied to the portion of the key groove portion that does not face the opening and It is transmitted by contact with the key member arranged at. The rigidity of the non-transmitting portion and the rigidity of the transmitting portion are realized by changing the shapes and materials of the lid member, the key member, and the key groove portion.

本発明においては、前記鋼管軸心方向に隣り合わされた鋼管の互いに対向する鋼管端部の一方に設けられる筒状継手と、他方の鋼管端部に設けられ、前記筒状継手に嵌合可能な軸状継手と、を有し、前記キー溝部は、前記筒状継手の筒状継手内周面に鋼管周方向に沿って備えられた内向き溝部と、前記筒状継手と前記軸状継手とが互いに嵌合させられた状態のときに、前記軸状継手の軸状継手外周面に前記鋼管周方向に沿って前記内向き溝部に対向するよう備えられた外向き溝部とから構成され、前記開口部は、前記筒状継手に設けられていると好適である。 In the present invention, a tubular joint provided on one of the steel pipe ends facing each other of the steel pipes adjacent to each other in the axial direction of the steel pipe, and a steel pipe end provided on the other steel pipe end, and can be fitted into the tubular joint. An axial joint is provided, and the key groove portion is an inward groove portion provided along the steel pipe circumferential direction on the tubular joint inner peripheral surface of the tubular joint, the tubular joint and the axial joint. When the two are fitted to each other, the shaft-shaped joint is configured to include an outward groove portion provided on the outer peripheral surface of the shaft-shaped joint so as to face the inward groove portion along the steel pipe circumferential direction, It is preferable that the opening be provided in the tubular joint.

筒状継手と軸状継手とが互いに嵌合させられた状態のときに、上述のようにして分割キー部材がキー溝部に配置されることにより、軸状継手と筒状継手とが抜け止め状態に連結される。このとき、開口部が存在しているため鋼管周方向のうち剛性が低い箇所に対応する部分に、鋼管軸心方向の荷重を伝達しない非伝達機構を備えているため、鋼管軸心方向の荷重は該部分において伝達されず該部分に変形を生じる虞がない。 When the tubular joint and the shaft-shaped joint are fitted to each other, the split key member is arranged in the key groove portion as described above, so that the shaft-shaped joint and the tubular joint are prevented from coming off. Connected to. At this time, since the non-transmission mechanism that does not transmit the load in the axial direction of the steel pipe is provided in the portion corresponding to the low rigidity in the circumferential direction of the steel pipe due to the existence of the opening, the load in the axial direction of the steel pipe is provided. Is not transmitted in the portion, and there is no risk of deformation in the portion.

本発明においては、前記鋼管軸心方向に隣り合わされた鋼管の互いに対向する鋼管端部の両方に設けられる軸状継手と、前記両軸状継手を隣り合わせた状態で、前記両軸状継手に周設可能な筒状継手と、を有し、前記キー溝部は、前記筒状継手の筒状継手内周面に鋼管周方向に沿って備えられた内向き溝部と、前記筒状継手と前記軸状継手とが互いに嵌合させられた状態のときに、前記軸状継手の軸状継手外周面に前記鋼管周方向に沿って前記内向き溝部に対向するよう備えられた外向き溝部とから構成され、前記開口部は、前記筒状継手に設けられていると好適である。 In the present invention, a shaft-shaped joint provided on both of the steel pipe end portions of the steel pipes adjacent to each other in the axial direction of the steel pipe in the axial direction, and the shaft-shaped joints in a state where the shaft-shaped joints are adjacent to each other, the circumference of the shaft-shaped joints. A cylindrical joint that can be provided, wherein the key groove portion is an inward groove portion provided along an inner peripheral surface of the cylindrical joint of the cylindrical joint along a steel pipe circumferential direction, the cylindrical joint and the shaft. And a grooved joint provided on the shaft-shaped joint outer peripheral surface of the shaft-shaped joint so as to face the inward grooved portion along the steel pipe circumferential direction when fitted together. It is preferable that the opening is provided in the tubular joint.

筒状継手に両軸状継手が挿設させられた状態のときに、上述のようにして分割キー部材がキー溝部に配置されることにより、軸状継手と筒状継手とが抜け止め状態に連結される。このとき、開口部が存在しているため鋼管周方向のうち剛性が低い箇所に対応する部分に、鋼管軸心方向の荷重を伝達しない非伝達機構を備えているため、鋼管軸心方向の荷重は該部分において伝達されず該部分に変形を生じる虞がない。 When both the shaft-shaped joints are inserted into the tubular joint, the split key member is arranged in the key groove portion as described above, so that the shaft-shaped joint and the tubular joint are prevented from coming off. Be connected. At this time, since the non-transmission mechanism that does not transmit the load in the axial direction of the steel pipe is provided in the portion corresponding to the low rigidity in the circumferential direction of the steel pipe due to the existence of the opening, the load in the axial direction of the steel pipe is provided. Is not transmitted in the portion, and there is no risk of deformation in the portion.

本発明においては、前記鋼管軸心方向に隣り合わされた鋼管の互いに対向する鋼管端部の両方に設けられる軸状継手と、前記両軸状継手を隣り合わせた状態で、前記両軸状継手に周設可能な筒状継手と、を有し、前記キー溝部は、前記筒状継手の筒状継手内周面に鋼管周方向に沿って備えられた内向き溝部と、前記筒状継手と前記軸状継手とが互いに嵌合させられた状態のときに、前記軸状継手の軸状継手外周面に前記鋼管周方向に沿って前記内向き溝部に対向するよう備えられた外向き溝部とから構成され、前記筒状継手は、前記鋼管周方向で複数個の周壁部材から構成され、前記開口部は、複数個の前記周壁部材のうち少なくとも一つの周壁部材に設けられていると好適である。 In the present invention, a shaft-shaped joint provided on both of the steel pipe end portions of the steel pipes adjacent to each other in the axial direction of the steel pipe in the axial direction, and the shaft-shaped joints in a state where the shaft-shaped joints are adjacent to each other, the circumference of the shaft-shaped joints. A cylindrical joint that can be provided, wherein the key groove portion is an inward groove portion provided along an inner peripheral surface of the cylindrical joint of the cylindrical joint along a steel pipe circumferential direction, the cylindrical joint and the shaft. And a grooved joint provided on the shaft-shaped joint outer peripheral surface of the shaft-shaped joint so as to face the inward grooved portion along the steel pipe circumferential direction when fitted together. It is preferable that the tubular joint is composed of a plurality of peripheral wall members in the circumferential direction of the steel pipe, and the opening is provided in at least one peripheral wall member of the plurality of peripheral wall members.

両軸状継手に筒状継手が周設させられた状態のときに、上述のようにして分割キー部材がキー溝部に配置されることにより、軸状継手と筒状継手とが抜け止め状態に連結される。このとき、開口部が存在しているため鋼管周方向のうち剛性が低い箇所に対応する部分に、鋼管軸心方向の荷重を伝達しない非伝達機構を備えているため、鋼管軸心方向の荷重は該部分において伝達されず該部分に変形を生じる虞がない。 When the tubular joint is provided around both shaft-like joints, the split key members are arranged in the key groove portions as described above, so that the shaft-like joint and the tubular joint are prevented from coming off. Be connected. At this time, since the non-transmission mechanism that does not transmit the load in the axial direction of the steel pipe is provided in the portion corresponding to the low rigidity in the circumferential direction of the steel pipe due to the existence of the opening, the load in the axial direction of the steel pipe is provided. Is not transmitted in the portion, and there is no risk of deformation in the portion.

鋼管連結機構によって連結される前と後の鋼管杭を一部切断して示す説明図Explanatory drawing which partially cuts and shows the steel pipe pile before and after being connected by the steel pipe connection mechanism. 蓋部材と分割キー部材の説明図Explanatory drawing of lid member and split key member 蓋部材とキー溝部の説明図Explanatory drawing of lid member and keyway 蓋部材の説明図Explanatory drawing of lid member 分割キー部材の説明図Explanatory drawing of split key member 蓋部材の説明図Explanatory drawing of lid member 分割キー部材の説明図Explanatory drawing of split key member 蓋部材の説明図Explanatory drawing of lid member 分割キー部材の説明図Explanatory drawing of split key member 別実施形態による鋼管連結機構によって連結される前と後の鋼管杭を一部切断して示す説明図Explanatory drawing which partially cuts and shows the steel pipe pile before and after being connected by the steel pipe connection mechanism by another embodiment. 蓋部材とキー溝部の説明図Explanatory drawing of lid member and keyway

以下に本発明の実施の形態を図面に基づいて説明する。
図１には、オーガーで掘削しながら地中に回転圧入して沈設する中掘工法に使用される鋼管杭Ｐ（Ｐ１，Ｐ２）が示されている。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows steel pipe piles P (P1, P2) used in a medium excavation method in which rotary excavation is performed by using an auger to rotatically press fit into the ground and sunk.

鋼管杭Ｐ（Ｐ１，Ｐ２）は、スパイラル鋼管等の鋼管Ｓ（Ｓ１，Ｓ２）の一方の端部に筒状継手１０が溶接連結されるともに、他方の端部に軸状継手２０が溶接連結された円筒体である。 In the steel pipe pile P (P1, P2), the tubular joint 10 is welded and connected to one end of the steel pipe S (S1, S2) such as a spiral steel pipe, and the axial joint 20 is welded and connected to the other end. It is a cylindrical body.

鋼管軸心Ｘ方向に隣り合う鋼管杭Ｐ（Ｐ１，Ｐ２）の互いに対向する鋼管Ｓ（Ｓ１，Ｓ２）の鋼管端部どうしは、本発明に係る鋼管連結機構Ｊによって抜け止め状態で、かつ、回り止め状態で連結される。 The steel pipe ends of the steel pipes S (S1, S2) of the steel pipe piles P (P1, P2) that are adjacent to each other in the steel pipe axis X direction are in a retaining state by the steel pipe connecting mechanism J according to the present invention, and They are connected in a non-rotating state.

鋼管連結機構Ｊは、筒状継手１０と、軸状継手２０と、キー部材を構成する分割キー部材３１と、回転抑止キー４０とを備えている。 The steel pipe connecting mechanism J includes a tubular joint 10, a shaft-shaped joint 20, a split key member 31 forming a key member, and a rotation inhibiting key 40.

筒状継手１０は、鋼製の筒状体を加工することによって作成される。筒状継手１０の下端側に突条１１と、鋼管周方向に間隔を隔てて複数の筒側切欠凹部１２が備えられている。筒状継手１０の内周面１３の上端側に溝部１４が備えられている。本実施形態における内周面１３が、本発明に係る筒状継手内周面である。内周面１３に、鋼管周方向に沿って、二条の内向き溝部１５が備えられている。 The tubular joint 10 is created by processing a tubular body made of steel. At the lower end side of the tubular joint 10, there are provided a ridge 11 and a plurality of tubular side cutout recesses 12 which are spaced apart in the circumferential direction of the steel pipe. A groove portion 14 is provided on the upper end side of the inner peripheral surface 13 of the tubular joint 10. The inner peripheral surface 13 in the present embodiment is the cylindrical joint inner peripheral surface according to the present invention. The inner peripheral surface 13 is provided with two inward groove portions 15 along the circumferential direction of the steel pipe.

筒状継手１０に、その外周面から内向き溝部１５に連通する開口部１６が設けられている。本実施形態においては、開口部１６の上下幅は内向き溝部１５の上下幅よりも略同じか多少大きい。 The tubular joint 10 is provided with an opening 16 that communicates with the inward groove portion 15 from the outer peripheral surface thereof. In this embodiment, the vertical width of the opening 16 is substantially the same as or slightly larger than the vertical width of the inward groove portion 15.

軸状継手２０は、鋼製の筒状体を加工することによって作成される。軸状継手２０の上端側に、筒状継手１０に備えられた溝部１４に嵌合可能な突条２１が備えられている。 The shaft joint 20 is created by processing a tubular body made of steel. On the upper end side of the shaft-like joint 20, there is provided a ridge 21 which can be fitted into the groove portion 14 provided in the tubular joint 10.

筒状継手１０と軸状継手２０とが互いに嵌合させられた状態であるときに、筒状継手１０に備えられた筒側切欠凹部１２と対向する位置に軸側切欠凹部２２が備えられている。筒側切欠凹部１２と軸側切欠凹部２２とによって、後述する回転抑止キー４０のキー溝部が構成される。軸側切欠凹部２２の中央部分に、回転抑止キー４０を該キー溝部に固定するための固定ネジ４１を螺着可能な雌ネジ２６が備えられている。 When the tubular joint 10 and the shaft-shaped joint 20 are fitted to each other, the shaft-side notch recess 22 is provided at a position facing the cylinder-side notch recess 12 provided in the tubular joint 10. There is. The cylinder-side cutout recess 12 and the shaft-side cutout recess 22 form a key groove portion of a rotation inhibiting key 40 described later. A female screw 26 is provided at the center of the shaft-side cutout recess 22 to which a fixing screw 41 for fixing the rotation inhibiting key 40 to the key groove portion can be screwed.

外周面２３は、鋼管軸心Ｘ方向の長さが筒状継手１０の内周面１３の鋼管軸心Ｘ方向の長さと略同じで、外径が内周面１３に嵌合可能な大きさに構成されている。本実施形態における外周面２３が、本発明に係る軸状継手外周面である。外周面２３の下端側に、筒状継手１０に備えられた突条１１が嵌合可能な溝部２４が形成されている。 The outer peripheral surface 23 has a length in the X direction of the steel pipe axis that is substantially the same as the length of the inner peripheral surface 13 of the tubular joint 10 in the X direction of the steel pipe axis, and has an outer diameter that can be fitted to the inner peripheral surface 13. Is configured. The outer peripheral surface 23 in the present embodiment is a shaft-shaped joint outer peripheral surface according to the present invention. On the lower end side of the outer peripheral surface 23, a groove portion 24 into which the protrusion 11 provided in the tubular joint 10 can be fitted is formed.

外周面２３に、鋼管周方向に沿って、二条の外向き溝部２５が、筒状継手１０と軸状継手２０とが互いに嵌合させられた状態であるときに、内向き溝部１５に対向するように備えられている。 On the outer peripheral surface 23, two outward groove portions 25 along the steel pipe circumferential direction face the inward groove portion 15 when the tubular joint 10 and the shaft joint 20 are fitted to each other. Is equipped with.

筒状継手１０と軸状継手２０とが互いに嵌合させられた状態であるときに、内向き溝部１５と外向き溝部２５とから構成される円環状の空間が分割キー部材３１を配置するキー溝部Ｇを構成する。キー溝部Ｇのうち鋼管周方向の少なくとも一部が、開口部１６を介して外部空間に連通されている。本実施形態においては、開口部１６は、キー溝部Ｇのうち鋼管周方向の一部にのみ備えられているが、鋼管周方向の複数個所に備えられてもよい。 When the tubular joint 10 and the shaft-shaped joint 20 are fitted to each other, an annular space composed of the inward groove portion 15 and the outward groove portion 25 arranges the split key member 31. The groove portion G is formed. At least a part of the key groove portion G in the circumferential direction of the steel pipe communicates with the external space via the opening 16. In the present embodiment, the openings 16 are provided only in a part of the key groove portion G in the circumferential direction of the steel pipe, but may be provided in a plurality of positions in the circumferential direction of the steel pipe.

筒状継手１０と軸状継手２０とが互いに嵌合させられた状態であるときに、軸状継手２０の外向き溝部２５のうち開口部１６に対向する部分に、後述する蓋部材５０を固定する雄ネジ５１を螺合可能な雌ネジ５２が備えられている When the tubular joint 10 and the shaft-shaped joint 20 are in a state of being fitted to each other, a lid member 50 described later is fixed to a portion of the outward-facing groove portion 25 of the shaft-shaped joint 20 facing the opening 16. Is provided with a female screw 52 into which a male screw 51 can be screwed.

分割キー部材３１は、筒状継手１０と軸状継手２０とが互いに嵌合させられた際に、筒状継手１０と軸状継手２０とを抜け止め状態で連結するための部材である。外部空間から開口部１６を介して、キー溝部Ｇに鋼管周方向に沿って複数の分割キー部材３１が配置される。 The split key member 31 is a member for connecting the tubular joint 10 and the shaft joint 20 in a retaining state when the tubular joint 10 and the shaft joint 20 are fitted to each other. A plurality of split key members 31 are arranged in the key groove portion G from the external space in the key groove portion G along the circumferential direction of the steel pipe.

図２及び図３に示すように、分割キー部材３１に、横断面が矩形で、外向き溝部２５の底面に対向するキー内周面が前記底面と略同じ曲率を有する円弧形状の部材であり、鋼製の長尺体を加工することによって作成される。 As shown in FIGS. 2 and 3, the split key member 31 is an arc-shaped member having a rectangular cross section and an inner key surface facing the bottom surface of the outward groove portion 25 having substantially the same curvature as the bottom surface. Created by processing a long steel body.

上述のように構成された複数の分割キー部材３１を用いて、筒状継手１０と軸状継手２０とが抜け止め状態に連結される。キー溝部Ｇに分割キー部材３１が配置された後は、図１、図２及び図３に示すように、蓋部材５０によって開口部１６が閉じられる。これにより、キー溝部Ｇに配置された分割キー部材３１が、開口部１６を介して外部空間に抜け出ることが防止される。 By using the plurality of split key members 31 configured as described above, the tubular joint 10 and the shaft-shaped joint 20 are coupled in a retaining state. After the split key member 31 is arranged in the key groove portion G, the opening 16 is closed by the lid member 50 as shown in FIGS. 1, 2 and 3. As a result, the split key member 31 arranged in the key groove portion G is prevented from slipping out to the external space through the opening 16.

図４に示すように、蓋部材５０のうち開口部１６に対向するキー溝部Ｇに存在する部分にテーパ面５３が備えられている。テーパ面５３が形成されている部分は、キー溝部Ｇにおいて鋼管軸心Ｘ方向の荷重を伝達する部分である分割キー部材３１にくらべて、上下方向の寸法が小さくなっている。そのため、蓋部材５０のテーパ面５３はキー溝部Ｇに接触することはない。したがって、蓋部材５０はテーパ面５３において鋼管軸心Ｘ方向に荷重を伝達しない。その結果、鋼管軸心Ｘ方向の荷重により開口部１６の部分に変形を生じる虞がない。 As shown in FIG. 4, a tapered surface 53 is provided on a portion of the lid member 50 that is present in the key groove portion G facing the opening 16. The portion in which the tapered surface 53 is formed has a smaller vertical dimension than the split key member 31 which is a portion in the key groove portion G for transmitting a load in the steel pipe axis X direction. Therefore, the tapered surface 53 of the lid member 50 does not come into contact with the key groove portion G. Therefore, the lid member 50 does not transmit the load on the tapered surface 53 in the X-axis direction of the steel pipe axis. As a result, there is no risk that the opening 16 will be deformed by the load in the X-axis direction of the steel pipe.

さらに、本実施形態においては、複数の分割キー部材３１のうち少なくとも、最も開口部１６に近い位置に配置される分割キー部材３１の開口部１６側の端部にもテーパ面３２が備えられている。 Further, in the present embodiment, at least one of the plurality of split key members 31 is provided with the tapered surface 32 at the end of the split key member 31 which is arranged at the position closest to the opening 16 on the opening 16 side. There is.

テーパ面３２が形成されている部分は、分割キー部材３１のうちテーパ面３２が形成されていない部分、すなわちキー溝部Ｇにおいて鋼管軸心Ｘ方向の荷重を伝達する部分にくらべて、上下方向の寸法が小さくなっている。そのため、分割キー部材３１のテーパ面３２はキー溝部Ｇに接触することはない。 The portion where the tapered surface 32 is formed is more vertical than the portion where the tapered surface 32 is not formed in the split key member 31, that is, the portion where the load in the X direction of the steel pipe axis is transmitted in the key groove portion G. The dimensions are smaller. Therefore, the tapered surface 32 of the split key member 31 does not come into contact with the key groove portion G.

したがって、分割キー部材３１はテーパ面３２において鋼管軸心Ｘ方向に荷重を伝達しない。このように、分割キー部材３１のうち、開口部１６との境界周りに位置する部分にもテーパ面３２を備えることによって、鋼管軸心Ｘ方向の荷重が作用することを回避することができる。なお、分割キー部材３１にテーパ面３２を備えていてなくてもよい。 Therefore, the split key member 31 does not transmit a load on the tapered surface 32 in the X-axis direction of the steel pipe axis. As described above, by providing the tapered surface 32 also in the portion of the split key member 31 located around the boundary with the opening 16, it is possible to prevent the load in the X-axis direction of the steel pipe from acting. The split key member 31 may not be provided with the tapered surface 32.

すなわち、本実施形態においては、蓋部材５０に備えられたテーパ面５３や、分割キー部材３１に備えられたテーパ面３２と、キー溝部Ｇとの隙間が、本発明に係る非伝達部隙間であり、これが非伝達機構を構成する。該非伝達部隙間は、キー溝部Ｇのうち開口部１６と対向しない部分と、該部分に配置される分割キー部材３１と、の隙間、すなわち伝達部隙間よりも大きい。 That is, in the present embodiment, the gap between the tapered surface 53 provided on the lid member 50, the tapered surface 32 provided on the split key member 31, and the key groove portion G is the non-transmission portion gap according to the present invention. Yes, this constitutes the non-transmission mechanism. The non-transmitting portion gap is larger than the gap between the portion of the key groove portion G that does not face the opening 16 and the split key member 31 arranged in that portion, that is, the transmitting portion gap.

蓋部材５０に、テーパ面５３に代えて、たとえば、図６に示すように、蓋部材５０のうち開口部１６に対向するキー溝部Ｇに存在する部分に狭幅部５４が備えられてもよい。狭幅部５４が形成されている部分は、キー溝部Ｇにおいて鋼管軸心Ｘ方向の荷重を伝達する部分である分割キー部材３１にくらべて、上下方向の寸法が小さくなっている。そのため、蓋部材５０の狭幅部５４はキー溝部Ｇに接触することはない。したがって、蓋部材５０は狭幅部５４において鋼管軸心Ｘ方向に荷重を伝達しない。その結果、鋼管軸心Ｘ方向の荷重により開口部１６の部分に変形を生じる虞がない。 Instead of the tapered surface 53, the lid member 50 may be provided with a narrow width portion 54 in a portion of the lid member 50, which is present in the key groove portion G facing the opening 16, as shown in FIG. 6, for example. .. The portion where the narrow width portion 54 is formed has a smaller vertical dimension than the split key member 31 which is a portion in the key groove portion G that transmits a load in the X direction of the steel pipe axis. Therefore, the narrow width portion 54 of the lid member 50 does not come into contact with the key groove portion G. Therefore, the lid member 50 does not transmit a load in the narrow tube portion 54 in the X-axis direction of the steel pipe. As a result, there is no risk that the opening 16 will be deformed by the load in the X-axis direction of the steel pipe.

さらに、複数の分割キー部材３１のうち最も開口部１６に近い位置に配置される分割キー部材３１の開口部１６側の端部に、テーパ面３２に代えて、図７に示すように、狭幅部３３が備えられてもよい。テーパ面３２が形成されている部分は、分割キー部材３１のうちテーパ面３２が形成されていない部分、すなわちキー溝部Ｇにおいて鋼管軸心Ｘ方向の荷重を伝達する部分にくらべて、上下方向の寸法が小さくなっている。そのため、分割キー部材３１のテーパ面３２はキー溝部Ｇに接触することはない。 Further, as shown in FIG. 7, instead of the tapered surface 32, a narrowed surface is provided at the end of the split key member 31 arranged at the position closest to the opening 16 of the plurality of split key members 31 on the opening 16 side. The width portion 33 may be provided. The portion where the tapered surface 32 is formed is more vertical than the portion where the tapered surface 32 is not formed in the split key member 31, that is, the portion where the load in the X direction of the steel pipe axis is transmitted in the key groove portion G. The dimensions are smaller. Therefore, the tapered surface 32 of the split key member 31 does not come into contact with the key groove portion G.

したがって、分割キー部材３１は狭幅部３３において鋼管軸心Ｘ方向に荷重を伝達しない。このように、分割キー部材３１のうち、開口部１６との境界周りに位置する部分にも狭幅部３３を備えることによって、鋼管軸心Ｘ方向の荷重が作用することを回避することができる。 Therefore, the split key member 31 does not transmit the load in the narrow tube portion 33 in the X-axis direction of the steel pipe axis. As described above, by providing the narrow width portion 33 also in the portion of the split key member 31 located around the boundary with the opening 16, it is possible to prevent the load in the X-axis direction of the steel pipe from acting. ..

以上のとおり、非伝達部隙間は、好ましくは、蓋部材５０や分割キー部材３１側に備えられたテーパ面５３やテーパ面３２、又は、狭幅部５４や狭幅部３３、とキー溝部Ｇとの隙間から構成される。しかし、非伝達部隙間はこれに限らない。たとえば、蓋部材５０や分割キー部材３１にテーパ面５３やテーパ面３２を備えることなく、テーパ面５３やテーパ面３２に対応する部分のキー溝部Ｇの鋼管軸心Ｘ方向の寸法を、その他の部分、すなわち鋼管軸心Ｘ方向の荷重を伝達する部分のキー溝部Ｇの寸法よりも長くすることによって構成されてもよい。 As described above, the non-transmission portion gap is preferably the tapered surface 53 or the tapered surface 32 provided on the lid member 50 or the split key member 31 side, or the narrow width portion 54 or the narrow width portion 33, and the key groove portion G. Composed of a gap between and. However, the non-transmission portion gap is not limited to this. For example, without providing the lid member 50 or the split key member 31 with the tapered surface 53 or the tapered surface 32, the dimension of the key groove portion G in the portion corresponding to the tapered surface 53 or the tapered surface 32 in the X direction of the steel pipe axis may be changed to other values. It may be configured by making it longer than the dimension of the key groove portion G of the portion, that is, the portion for transmitting the load in the X direction of the steel pipe axis.

また、上述の実施形態においては、非伝達部隙間から非伝達機構が構成される場合について説明したが、これに限らない。たとえば、図８に示すように、蓋部材５０のうち開口部１６に対向するキー溝部Ｇに存在する部分に低剛性部５５が備えられている。 Further, in the above-described embodiment, the case where the non-transmission mechanism is configured by the non-transmission portion gap has been described, but the configuration is not limited to this. For example, as shown in FIG. 8, a low-rigidity portion 55 is provided in a portion of the lid member 50 that is present in the key groove portion G facing the opening 16.

低剛性部５５は、キー溝部Ｇにおいて鋼管軸心Ｘ方向の荷重を伝達する部分である分割キー部材３１にくらべて、弾性係数が小さな材料、たとえば樹脂から形成されている。低剛性部５５が形成されている部分は、キー溝部Ｇにおいて鋼管軸心Ｘ方向の荷重を伝達する分割キー部材３１にくらべて、剛性が低くなっている。 The low-rigidity portion 55 is formed of a material having a smaller elastic coefficient than that of the split key member 31, which is a portion of the key groove portion G that transmits a load in the X-axis direction of the steel pipe, such as a resin. The portion where the low-rigidity portion 55 is formed is lower in rigidity in the key groove portion G than in the split key member 31 that transmits a load in the X-axis direction of the steel pipe.

そのため、分割キー部材３１は低剛性部３４において鋼管軸心Ｘ方向に荷重を伝達しない。したがって、蓋部材５０は低剛性部５５において鋼管軸心Ｘ方向に荷重を伝達しない。その結果、鋼管軸心Ｘ方向の荷重により開口部１６の部分に変形を生じる虞がない。なお、蓋部材５０のすべてを分割キー部材３１にくらべて、剛性が低い材料から構成してもよい。 Therefore, the split key member 31 does not transmit the load in the X axis direction of the steel pipe in the low rigidity portion 34. Therefore, the lid member 50 does not transmit the load in the X axis direction of the steel pipe in the low rigidity portion 55. As a result, there is no risk that the opening 16 will be deformed by the load in the X-axis direction of the steel pipe. It should be noted that all of the lid member 50 may be made of a material having lower rigidity than the split key member 31.

さらに、複数の分割キー部材３１のうち少なくとも、最も開口部１６に近い位置に配置される分割キー部材３１の開口部１６側の端部にも低剛性部３４が備えられてもよい。この場合も、低剛性部３４は、キー溝部Ｇにおいて鋼管軸心Ｘ方向の荷重を伝達する部分である分割キー部材３１にくらべて、剛性が低い材料、たとえば樹脂から形成されている。 Further, the low-rigidity portion 34 may be provided at least at an end portion of the split key member 31 arranged at the position closest to the opening 16 of the split key members 31 on the opening 16 side. In this case as well, the low-rigidity portion 34 is formed of a material having a lower rigidity than that of the split key member 31, which is a portion of the key groove portion G that transmits the load in the X-axis direction of the steel pipe axis, for example, a resin.

低剛性部３４が形成されている部分は、分割キー部材３１のうち低剛性部３４が形成されていない部分、すなわちキー溝部Ｇにおいて鋼管軸心Ｘ方向の荷重を伝達する部分にくらべて、剛性が低くなっている。 The portion where the low-rigidity portion 34 is formed is more rigid than the portion of the split key member 31 where the low-rigidity portion 34 is not formed, that is, the portion where the load in the X direction of the steel pipe axis is transmitted in the key groove portion G. Is low.

したがって、分割キー部材３１は低剛性部３４において鋼管軸心Ｘ方向に荷重を伝達しない。このように、分割キー部材３１のうち、開口部１６との境界周りに位置する部分にも低剛性部３４を備えることによって、鋼管軸心Ｘ方向の荷重が作用することを回避することができる。なお、分割キー部材３１に低剛性部３４を備えていてなくてもよい。 Therefore, the split key member 31 does not transmit the load in the X axis direction of the steel pipe in the low rigidity portion 34. As described above, by providing the low-rigidity portion 34 also in the portion of the split key member 31 located around the boundary with the opening 16, it is possible to prevent the load in the X-axis direction of the steel pipe from acting. .. The split key member 31 may not be provided with the low rigidity portion 34.

すなわち、本実施形態においては、蓋部材５０に備えられた低剛性部５５や、分割キー部材３１に備えられた低剛性部３４の剛性が、本発明に係る非伝達部剛性であり、これが非伝達機構を構成する。 That is, in the present embodiment, the rigidity of the low-rigidity portion 55 included in the lid member 50 and the low-rigidity portion 34 included in the split key member 31 is the non-transmission portion rigidity according to the present invention. It constitutes a transmission mechanism.

なお、非伝達部剛性は、蓋部材５０や分割キー部材３１側に備えられた低剛性部５５や低剛性部３４から構成される場合に限らない。たとえば、蓋部材５０や分割キー部材３１に低剛性部５５や低剛性部３４を備えることなく、低剛性部５５や低剛性部３４に対応する部分のキー溝部Ｇの剛性を、その他の部分、すなわち鋼管軸心Ｘ方向の荷重を伝達する部分のキー溝部Ｇの剛性よりも低くすることによって構成されてもよい。 The rigidity of the non-transmission portion is not limited to the case where the non-transmission portion is composed of the low-rigidity portion 55 and the low-rigidity portion 34 provided on the lid member 50 or the split key member 31 side. For example, without providing the low-rigidity portion 55 and the low-rigidity portion 34 in the lid member 50 and the split key member 31, the rigidity of the key groove portion G in the portion corresponding to the low-rigidity portion 55 and the low-rigidity portion 34 is That is, the rigidity may be set to be lower than the rigidity of the key groove portion G of the portion that transmits the load in the X direction of the steel pipe axis.

さらに、非伝達部剛性は、低剛性部５５や低剛性部３４が、分割キー部材３１の材料よりも剛性が低い材料から構成される場合に限らず、一部にくり抜きや切り欠きを備えた断面係数が小さな形状から構成されてもよい。 Further, the rigidity of the non-transmission portion is not limited to the case where the low-rigidity portion 55 and the low-rigidity portion 34 are made of a material whose rigidity is lower than that of the material of the split key member 31, and a part is provided with a cutout or a notch. It may be configured from a shape having a small section modulus.

また、上述の実施形態においては、鋼管連結機構Ｊは、鋼管軸心Ｘ方向に隣り合わされた鋼管Ｓ（Ｓ１，Ｓ２）の互いに対向する鋼管端部の一方に筒状継手１０が設けられ、他方の鋼管端部に軸状継手２０が設けられる場合について説明したが、これに限らない。 Further, in the above-described embodiment, in the steel pipe coupling mechanism J, the tubular joint 10 is provided at one of the steel pipe ends of the steel pipes S (S1, S2) that are adjacent to each other in the steel pipe axis X direction, the steel pipe ends being opposite to each other. Although the case where the shaft-shaped joint 20 is provided at the end of the steel pipe has been described, the present invention is not limited to this.

たとえば、図１０に示すように、鋼管軸心Ｘ方向に隣り合わされた鋼管Ｓ（Ｓ１，Ｓ２）の互いに対向する鋼管端部の両方に軸状継手２０が設けられ、両軸状継手２０を隣り合わせた状態で、両軸状継手２０に筒状継手１０が周設される構成であってもよい。なお、図１に示す構成と対応する構成について同じ符号を付している。 For example, as shown in FIG. 10, shaft-like joints 20 are provided on both of the steel pipe ends of the steel pipes S (S1, S2) adjacent to each other in the X-axis direction of the steel pipe, and the shaft-like joints 20 are arranged next to each other. Alternatively, the tubular joint 10 may be provided around both shaft-shaped joints 20 in the closed state. Note that the same reference numerals are given to configurations corresponding to the configurations shown in FIG.

この実施形態において、筒状継手１０は、内周面に鋼管周方向に沿って、二条の内向き溝部１５が備えられている。しかし、両軸状継手２０には、それぞれ一条の外向き溝部２５が備えられている。さらに、筒状継手１０は、鋼管周方向に複数の周壁部材１０ａ及び周壁部材１０ｂから構成されている。なお、周壁部材１０ａにのみ開口部１６が備えられている。 In this embodiment, the tubular joint 10 is provided with two inward groove portions 15 on the inner peripheral surface along the circumferential direction of the steel pipe. However, the shaft-shaped joints 20 are each provided with a single line of the outward groove portion 25. Furthermore, the tubular joint 10 is composed of a plurality of peripheral wall members 10a and 10b in the circumferential direction of the steel pipe. The opening 16 is provided only in the peripheral wall member 10a.

このような筒状継手１０及び軸状継手２０の構成であっても、図２に示すような分割キー部材３１を用いて、筒状継手１０と軸状継手２０とを抜け止め状態に連結することができる。キー溝部Ｇに分割キー部材３１が配置された後は、図１１に示すように、蓋部材５０によって開口部１６が閉じられる。 Even with such a configuration of the tubular joint 10 and the shaft-shaped joint 20, the split key member 31 as shown in FIG. 2 is used to connect the tubular joint 10 and the shaft-shaped joint 20 in a retaining state. be able to. After the split key member 31 is arranged in the key groove portion G, as shown in FIG. 11, the opening 16 is closed by the lid member 50.

なお、図１０における筒状継手１０は、鋼管周方向に分割形成されていなくてもよく、一つの円筒状体のまま構成されていてもよい。すなわち、筒状継手１０は、鋼管軸心Ｘ方向に隣り合わされた鋼管Ｓ（Ｓ１，Ｓ２）の互いに対向する鋼管端部の両方に設けられる軸状継手２０が隣り合うように挿設可能であってもよい。なお、この場合、筒状継手１０の内周面１３の上端側に溝部１４を備えたり、軸状継手２０に筒状継手１０に備えられた溝部１４に嵌合可能な突条２１を備えたりしていなくてもよい。 The tubular joint 10 in FIG. 10 may not be formed separately in the circumferential direction of the steel pipe, and may be configured as a single cylindrical body. That is, the tubular joint 10 can be inserted so that the axial joints 20 provided at both of the steel pipe ends of the steel pipes S (S1, S2) that are adjacent to each other in the steel pipe axis X direction are adjacent to each other. May be. In this case, the groove portion 14 is provided on the upper end side of the inner peripheral surface 13 of the tubular joint 10, or the shaft-like joint 20 is provided with the protrusion 21 that can be fitted into the groove portion 14 provided in the tubular joint 10. You don't have to.

この実施形態において、筒状継手１０は、内周面に鋼管周方向に沿って、二条の内向き溝部１５が備えられている。しかし、両軸状継手２０には、それぞれ一条の外向き溝部２５が備えられている。筒状継手１０には、適当な位置に、その外周面から内向き溝部１５に連通する一又は複数の開口部１６が備えられている。 In this embodiment, the tubular joint 10 is provided with two inward groove portions 15 on the inner peripheral surface along the circumferential direction of the steel pipe. However, the shaft-shaped joints 20 are each provided with a single line of the outward groove portion 25. The tubular joint 10 is provided with one or a plurality of openings 16 communicating with the inward groove portion 15 from the outer peripheral surface thereof at an appropriate position.

このような筒状継手１０及び軸状継手２０の構成であっても、図２に示すような分割キー部材３１を用いて、筒状継手１０と軸状継手２０とを抜け止め状態に連結することができる。キー溝部Ｇに分割キー部材３１が配置された後は、図１１に示すように、蓋部材５０によって開口部１６が閉じられる。 Even with such a configuration of the tubular joint 10 and the shaft-shaped joint 20, the split key member 31 as shown in FIG. 2 is used to connect the tubular joint 10 and the shaft-shaped joint 20 in a retaining state. be able to. After the split key member 31 is arranged in the key groove portion G, as shown in FIG. 11, the opening 16 is closed by the lid member 50.

さらに、本発明に係る鋼管連結機構は、特許第４６３２９１１号公報に開示されるような、二つの柱状体を略同一の軸心上で互いに抜き差し不能に接合する柱状体の接合構造であって、前記二つの柱状体のうち一方の柱状体に設けられた軸状継手部と、前記二つの柱状体のうち他方の柱状体に設けられ、前記軸状継手部に外嵌自在な筒状継手部と、前記軸状継手部の外周に前記軸心の周方向に沿って設けられた軸側キー溝と、前記筒状継手部の内周に前記周方向に沿って設けられるとともに、前記軸状継手部に前記筒状継手部を外嵌したときに前記軸側キー溝と対向する筒側キー溝と、前記軸側キー溝と前記筒側キー溝とにわたるように、前記筒状継手部の外側から前記軸心に直交する方向に沿って抜き差し自在なキーと、前記キーの抜き差し方向に直交する方向に沿って、前記軸状継手部及び筒状継手部のいずれか一方に形成された保持穴と、前記保持穴に対して回転させることなく抜き差し自在であって、前記キーの抜け出し側の端部に当接して前記キーの抜け出しを防止するピンと、を備えた柱状体の接合構造にも適用することもできる。 Further, the steel pipe connecting mechanism according to the present invention has a columnar body joining structure for joining two columnar bodies in a mutually unpluggable manner on substantially the same axis, as disclosed in Japanese Patent No. 4632911. A shaft-shaped joint portion provided on one of the two columnar bodies, and a tubular joint portion provided on the other columnar body of the two columnar bodies and which can be externally fitted to the shaft-shaped joint portion. A shaft-side key groove provided along the circumferential direction of the shaft center on the outer periphery of the shaft-like joint portion, and along the circumferential direction on the inner circumference of the tubular joint portion, When the tubular joint portion is externally fitted to the joint portion, the tubular side key groove is opposed to the shaft side key groove, the shaft side key groove and the tubular side key groove, so that the tubular joint portion A key that can be inserted/removed from the outside along a direction orthogonal to the axis, and a holding formed on either one of the axial joint portion and the tubular joint portion along a direction orthogonal to the insertion/removal direction of the key. A columnar joint structure having a hole and a pin that can be inserted/removed without rotating with respect to the holding hole and that abuts on the end of the key on the side of removal to prevent the key from coming out It can also be applied.

すなわち、特許第４６３２９１１号公報の図１に示されるようなヤットコにも適用することができ、この場合は、各キーや、各キーの抜け止めを防止するピンのうち開口部内に位置する部分に、鋼管軸心Ｘ方向に荷重を伝達しない非伝達機構が備えられていればよい。開口部が存在しているため鋼管周方向のうち剛性が低い箇所に対応する部分に、鋼管軸心方向の荷重を伝達しない非伝達機構を備えているため、鋼管軸心方向の荷重は該部分において伝達されず該部分に変形を生じる虞がない。 That is, the present invention can be applied to a yatco as shown in FIG. 1 of Japanese Patent No. 4632911, and in this case, in each key and a portion of the pin that prevents the key from coming off, the portion located inside the opening. It suffices that a non-transmission mechanism that does not transmit a load in the X-axis direction of the steel pipe axis is provided. Since there is an opening, the non-transmission mechanism that does not transmit the load in the axial direction of the steel pipe is provided in the portion corresponding to the low rigidity in the circumferential direction of the steel pipe. Therefore, there is no possibility that the portion will not be transmitted and the portion will be deformed.

上述した実施形態は、いずれも本発明の一例であり、該記載により本発明が限定されるものではなく、各部の具体的構成は本発明の作用効果が奏される範囲で適宜変更設計可能である。 The above-described embodiments are all examples of the present invention, and the present invention is not limited by the description, and the specific configuration of each part can be appropriately modified and designed within the range in which the effects of the present invention are exhibited. is there.

１０ ：筒状継手
１０ａ ：周壁部材
１０ｂ ：周壁部材
１３ ：内周面（筒状継手内周面）
１４ ：溝部
１５ ：内向き溝部
１６ ：開口部
２０ ：軸状継手
２３ ：外周面（軸状継手外周面）
２４ ：溝部
２５ ：外向き溝部
３１ ：分割キー部材
３２ ：テーパ面
３３ ：狭幅部
３４ ：低剛性部
５０ ：蓋部材
５１ ：雄ネジ
５２ ：雌ネジ
５３ ：テーパ面
５４ ：狭幅部
５５ ：低剛性部
Ｇ ：キー溝部
Ｊ ：鋼管連結機構
Ｓ ：鋼管
Ｘ ：鋼管軸心
10: tubular joint 10a: peripheral wall member 10b: peripheral wall member 13: inner peripheral surface (cylindrical joint inner peripheral surface)
14: Groove 15: Inward groove 16: Opening 20: Shaft joint 23: Outer peripheral surface (shaft-shaped outer peripheral surface)
24: Groove 25: Outward groove 31: Split key member 32: Tapered surface 33: Narrow width portion 34: Low rigidity portion 50: Lid member 51: Male screw 52: Female screw 53: Tapered surface 54: Narrow width portion 55: Low rigidity part G: Key groove part J: Steel pipe connecting mechanism S: Steel pipe X: Steel pipe shaft center

Claims (7)

鋼管軸心方向に隣り合わされた鋼管の互いに対向する鋼管端部どうしを、鋼管周方向に沿って設けられたキー溝部に配置したキー部材によって前記鋼管軸心方向に抜け止め状態に連結する鋼管連結機構であって、
前記キー溝部のうち前記鋼管周方向の少なくとも一部を外部空間に連通する開口部に、前記外部空間から前記開口部を介して前記キー溝部に配置された前記キー部材が、前記開口部を介して前記外部空間に抜け出ることを防止する蓋部材が取り付け可能であり、
少なくとも、前記蓋部材及び前記キー部材のうち前記開口部に対向する前記キー溝部に存在する部分と、前記開口部に対向する前記キー溝部と、のいずれかに、前記鋼管軸心方向に荷重を伝達しない非伝達機構が備えられている鋼管連結機構。 Steel pipe connection in which steel pipe end portions of steel pipes adjacent to each other in the steel pipe axial direction are connected to each other by key members arranged in key groove portions provided along the steel pipe circumferential direction in the steel pipe axial direction A mechanism,
In the opening communicating at least a part of the steel pipe circumferential direction of the key groove portion with an external space, the key member arranged in the key groove portion through the opening from the external space, via the opening. It is possible to attach a lid member that prevents the lid member from slipping out into the external space,
A load is applied in the axial direction of the steel pipe to at least one of the lid member and the key member, which is present in the key groove portion facing the opening, and the key groove portion facing the opening. Steel pipe connecting mechanism equipped with non-transmitting mechanism that does not transmit. 前記非伝達機構は、少なくとも、前記キー部材のうち前記開口部側の端部と、前記キー溝部のうち前記端部に対応する部分と、のいずれかにも備えられている請求項１に記載の鋼管連結機構。 The said non-transmission mechanism is provided in at least any one of the edge part by the side of the said opening part among the said key members, and the part corresponding to the said edge part among the said key groove parts. Steel pipe connection mechanism. 前記非伝達機構は、前記蓋部材及び前記キー部材のうち前記開口部に対向する前記キー溝部に存在する部分と、前記開口部に対向する前記キー溝部と、の非伝達部隙間から構成され、
前記非伝達部隙間は、前記キー溝部のうち前記開口部と対向しない部分と、該部分に配置される前記キー部材との伝達部隙間よりも大きい請求項１又は２に記載の鋼管連結機構。 The non-transmission mechanism includes a non-transmission portion gap between a portion of the lid member and the key member that is present in the key groove portion that faces the opening portion and the key groove portion that faces the opening portion,
The steel pipe connecting mechanism according to claim 1 or 2, wherein the non-transmission portion gap is larger than a transmission portion gap between a portion of the key groove portion that does not face the opening portion and the key member arranged in the portion. 前記非伝達機構は、少なくとも、前記蓋部材及び前記キー部材のうち前記開口部に対向する前記キー溝部に存在する部分、又は、前記開口部に対向する前記キー溝部のいずれかの非伝達部剛性から構成され、
前記非伝達部剛性は、前記キー溝部のうち前記開口部と対向しない部分、及び、該部分に配置される前記キー部材の伝達部剛性よりも低い請求項１から３のいずれか一項に記載の鋼管連結機構。 The non-transmission mechanism is at least a non-transmission portion rigidity of a portion of the lid member and the key member that is present in the key groove portion that faces the opening portion, or the key groove portion that faces the opening portion. Consists of
The non-transmission portion rigidity is lower than a transmission portion rigidity of a portion of the key groove portion that does not face the opening portion and the key member arranged in the portion. Steel pipe connection mechanism. 前記鋼管軸心方向に隣り合わされた鋼管の互いに対向する鋼管端部の一方に設けられる筒状継手と、他方の鋼管端部に設けられ、前記筒状継手に嵌合可能な軸状継手と、を有し、
前記キー溝部は、前記筒状継手の筒状継手内周面に鋼管周方向に沿って備えられた内向き溝部と、前記筒状継手と前記軸状継手とが互いに嵌合させられた状態のときに、前記軸状継手の軸状継手外周面に前記鋼管周方向に沿って前記内向き溝部に対向するよう備えられた外向き溝部とから構成され、
前記開口部は、前記筒状継手に設けられている請求項１から４のいずれか一項に記載の鋼管連結機構。 A tubular joint provided at one of the steel pipe end portions of the steel pipes adjacent to each other in the steel pipe axial direction, and a tubular joint provided at the other steel pipe end portion, and capable of being fitted into the tubular joint, Have
The key groove portion is a state in which the inward groove portion provided along the steel pipe circumferential direction on the tubular joint inner peripheral surface of the tubular joint, and the tubular joint and the axial joint are fitted to each other. Sometimes, the shaft-shaped joint of the shaft-shaped joint is configured from an outward groove portion provided so as to face the inward groove portion along the steel pipe circumferential direction,
The steel pipe connecting mechanism according to any one of claims 1 to 4, wherein the opening is provided in the tubular joint. 前記鋼管軸心方向に隣り合わされた鋼管の互いに対向する鋼管端部の両方に設けられる軸状継手と、
前記両軸状継手を隣り合わせた状態で、前記両軸状継手に周設可能な筒状継手と、を有し、
前記キー溝部は、前記筒状継手の筒状継手内周面に鋼管周方向に沿って備えられた内向き溝部と、前記筒状継手と前記軸状継手とが互いに嵌合させられた状態のときに、前記軸状継手の軸状継手外周面に前記鋼管周方向に沿って前記内向き溝部に対向するよう備えられた外向き溝部とから構成され、
前記開口部は、前記筒状継手に設けられている請求項１から４のいずれか一項に記載の鋼管連結機構。 A shaft-shaped joint provided on both of the steel pipe ends of the steel pipes adjacent to each other in the steel pipe axial direction,
In a state where the both shaft-shaped joints are adjacent to each other, a tubular joint that can be provided around the both shaft-shaped joints,
The key groove portion is in a state in which the inward groove portion provided in the tubular joint inner peripheral surface of the tubular joint along the steel pipe circumferential direction, and the tubular joint and the axial joint are fitted to each other. Sometimes, the shaft-shaped joint of the shaft-shaped joint is configured from an outward groove portion provided so as to face the inward groove portion along the steel pipe circumferential direction,
The steel pipe connecting mechanism according to any one of claims 1 to 4, wherein the opening is provided in the tubular joint. 前記鋼管軸心方向に隣り合わされた鋼管の互いに対向する鋼管端部の両方に設けられる軸状継手と、
前記両軸状継手を隣り合わせた状態で、前記両軸状継手に周設可能な筒状継手と、を有し、
前記キー溝部は、前記筒状継手の筒状継手内周面に鋼管周方向に沿って備えられた内向き溝部と、前記筒状継手と前記軸状継手とが互いに嵌合させられた状態のときに、前記軸状継手の軸状継手外周面に前記鋼管周方向に沿って前記内向き溝部に対向するよう備えられた外向き溝部とから構成され、
前記筒状継手は、前記鋼管周方向で複数個の周壁部材から構成され、
前記開口部は、複数個の前記周壁部材のうち少なくとも一つの周壁部材に設けられている請求項１から４のいずれか一項に記載の鋼管連結機構。
A shaft-shaped joint provided on both of the steel pipe ends of the steel pipes adjacent to each other in the steel pipe axial direction,
In a state where the both shaft-shaped joints are adjacent to each other, a tubular joint that can be provided around the both shaft-shaped joints,
The key groove portion is in a state in which the inward groove portion provided in the tubular joint inner peripheral surface of the tubular joint along the steel pipe circumferential direction, and the tubular joint and the axial joint are fitted to each other. Sometimes, the shaft-shaped joint of the shaft-shaped joint is configured from an outward groove portion provided so as to face the inward groove portion along the steel pipe circumferential direction,
The tubular joint is composed of a plurality of peripheral wall members in the steel pipe circumferential direction,
The steel pipe connecting mechanism according to claim 1, wherein the opening is provided in at least one peripheral wall member of the plurality of peripheral wall members.
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US4293148A (en) * 1979-02-22 1981-10-06 Fmc Corporation Pile connector
JP3949034B2 (en) * 2002-08-26 2007-07-25 株式会社クボタ Columnar joint structure
JP5619650B2 (en) * 2011-02-18 2014-11-05 株式会社クボタ Columnar joint structure and method of cleaning the joint
JP6456181B2 (en) * 2015-02-20 2019-01-23 株式会社クボタ Steel pipe joint mechanism and connection method

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