JP7315996B2 - support structure - Google Patents

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JP7315996B2
JP7315996B2 JP2022074728A JP2022074728A JP7315996B2 JP 7315996 B2 JP7315996 B2 JP 7315996B2 JP 2022074728 A JP2022074728 A JP 2022074728A JP 2022074728 A JP2022074728 A JP 2022074728A JP 7315996 B2 JP7315996 B2 JP 7315996B2
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female
female threaded
support
threaded body
outer tube
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JP2022106882A (en
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裕 道脇
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Nejilaw Inc
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Nejilaw Inc
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Description

本発明は、二つの部材を適宜の位置で支持する支持構造に関する。 The present invention relates to a support structure that supports two members at appropriate positions.

従来、机、椅子の長さ調整機構としてのパイプ脚部を装着している。パイプ脚部は、内管と外管により伸縮自在な二重管構造を有している(例えば、特許文献1参照)。このような二重管構造の長さ調節機構は、外管を構成する上脚部の外周に設けたロック部材を、内管を構成する下脚部の外周に設けた階段状の段差部に係止させたときに、ロック状態となってパイプ脚部の長さが固定される。 Conventionally, pipe legs are attached as a mechanism for adjusting the length of desks and chairs. The pipe leg has a double-pipe structure that is flexible with an inner pipe and an outer pipe (see, for example, Patent Document 1). In such a double-pipe structure length adjusting mechanism, a locking member provided on the outer circumference of the upper leg portion constituting the outer pipe is engaged with a stepped portion provided on the outer circumference of the lower leg portion constituting the inner pipe. When stopped, the length of the pipe leg is fixed in a locked state.

特開2002-253348号公報JP-A-2002-253348

上述した特許文献1に記載された二重管構造の長さ調節機構は、外管と内管との軸方向が一致しているため、内管に対して外管の角度調節を行うことができず、机や椅子においては各々のパイプ脚部が平行に延伸していない場合、即ち何れかのパイプ脚部が他のパイプ脚部に対して傾いている場合、天板が傾いてしまい、使用者にとって非常に使いづらいものとなってしまうという問題がある。 In the length adjusting mechanism of the double tube structure described in the above-mentioned Patent Document 1, since the axial directions of the outer tube and the inner tube are aligned, it is possible to adjust the angle of the outer tube with respect to the inner tube. In desks and chairs, if the pipe legs do not extend in parallel, that is, if one of the pipe legs is tilted with respect to the other pipe legs, the top plate will tilt, There is a problem that it becomes very difficult for the user to use.

本発明は、上記問題点に鑑みて本発明者の鋭意研究により成されたものであり、簡易な構造によって、互いに固定される二つの部材の内、一方の部材を他方の部材に対して角度調節可能に、且つ調整された角度位置を保持する手段を提供することを目的とする。 The present invention has been accomplished through extensive research by the inventors in view of the above problems. It is an object of the invention to provide a means of maintaining an adjustable and adjusted angular position.

本発明の支持構造は、被固定部材に対して所定位置に配置される支持体を支持する支持構造であって、上記支持体の外面に貫穿された孔部に挿通され、支持端部が該支持体の内面側に位置し、他端側が該外面よりも外側に位置する軸部を備え、上記軸部は、上記軸部に形成された雄ねじ部と、上記雄ねじ部に螺合する第一雌ねじ体及び第二雌ねじ体を有し、上記軸部の軸方向の位置を調整可能に上記軸部を、上記支持体に対して固定し得る位置可調固定機構と、上記支持端部に形成され、上記被固定部材に当接し、且つ、該被固定部材から受ける入力を、枢動して追随しながら受容して該支持体を支持可能とする枢動機構とを備え、上記位置可調固定機構は、上記第一雌ねじ体に設けられる第一嵌合部と上記第二雌ねじ体に設けられる第二嵌合部とが互いに嵌合しているとき、上記軸部に軸方向及び/又は軸回り方向の外力が作用しても互いに嵌合して相対変位を規制するように構成され、上記支持体に上記軸部を複数挿通し、前記枢動機構を上記被固定部材に当接させることで、上記被固定部材に対して上記支持体を固定することを特徴とする。 A support structure of the present invention is a support structure for supporting a support arranged at a predetermined position with respect to a member to be fixed, wherein the support is inserted through a hole formed in the outer surface of the support, and the support end is attached to the hole. A shaft is positioned on the inner surface side of the support and the other end side is positioned outside the outer surface. a position-adjustable fixing mechanism having a female screw and a second female screw, and capable of fixing the shaft to the support so that the axial position of the shaft can be adjusted; a pivoting mechanism that abuts on the member to be fixed and receives an input received from the member to be fixed while pivoting to follow the input to support the support; When the first fitting portion provided on the first female threaded body and the second fitting portion provided on the second female threaded body are fitted to each other, the fixing mechanism is axially and/or axially attached to the shaft portion. A plurality of the shaft portions are inserted into the support body, and the pivoting mechanism is brought into contact with the member to be fixed. Thus, the support is fixed to the member to be fixed.

また、本発明の支持構造は、前記第一嵌合部が、列状突起を成す第一条部を有し、前記第二嵌合部は、前記第一条部と異なる方向に延在し、該第一条部と当接する列状突起を成す第二条部を有し、前記位置可調固定機構は、上記第一条部と上記第二条部の間に押圧力が作用したとき、上記第一条部と上記第二条部の交差部分において上記第一条部の弾性及び/又は塑性変形によって第一変位部が作出され、且つ、上記交差部分において該第二条部の弾性及び/又は塑性変形によって第二変位部が作出され、これら上記第一変位部と上記第二変位部の相互が係合することによって嵌合状態を保持し得るように構成されることを特徴とする。 Further, in the support structure of the present invention, the first fitting portion has a first line portion forming a row-like projection, and the second fitting portion extends in a direction different from that of the first line portion. , having a second ridge portion forming a row-shaped projection that abuts on the first ridge portion, the position-adjustable fixing mechanism, when a pressing force acts between the first ridge portion and the second ridge portion , a first displacement portion is created by elastic and/or plastic deformation of the first ridge at the intersection of the first ridge and the second ridge, and elastic deformation of the second ridge at the intersection And/or a second displacement portion is created by plastic deformation, and the first displacement portion and the second displacement portion are engaged with each other so that the fitted state can be maintained. do.

また、本発明の支持構造は、前記第二嵌合部が、対向する前記第一嵌合部を収容し得る収容凹部を有し、前記位置可調固定機構は、前記第一嵌合部と前記収容凹部が嵌合するように構成されることを特徴とする。 Further, in the support structure of the present invention, the second fitting portion has an accommodating recess capable of accommodating the opposing first fitting portion, and the position-adjustable fixing mechanism includes the first fitting portion and the It is characterized by being configured so that the accommodation recess is fitted.

また、本発明の支持構造は、前記収容凹部の内壁が、前記第二雌ねじ体の軸からの距離が周方向に沿って変動する形態、及び/又は、前記第一嵌合部の外壁は、前記第一雌ねじ体の軸からの距離が周方向に沿って変動する形態とされることにより、前記収容凹部の内壁と前記第一嵌合部の外壁の当接によって前記嵌合状態を得るように構成されることを特徴とする。 Further, in the support structure of the present invention, the inner wall of the housing recess has a form in which the distance from the axis of the second female thread body varies along the circumferential direction, and / or the outer wall of the first fitting part is By adopting a form in which the distance from the axis of the first female screw body varies along the circumferential direction, the fitting state is obtained by contact between the inner wall of the accommodating recess and the outer wall of the first fitting portion. It is characterized by being configured to

また、本発明の支持構造は、前記雄ねじ部が、適宜のリード角及び/又はリード方向に設定され、前記第一雌ねじ体が螺合するように形成された第一螺旋溝と、上記リード角及び/又はリード方向に対して相異なるリード角及び/又はリード方向に設定され、前記第二雌ねじ体が螺合するように形成された第二螺旋溝とを有し、上記第二螺旋溝は、上記第一螺旋溝が形成された領域の少なくとも一部の領域で重複するように形成されていることを特徴とする。 Further, the support structure of the present invention includes a first spiral groove formed so that the male thread portion is set to an appropriate lead angle and / or lead direction, and the first female thread body is screwed, and the lead angle and/or a second spiral groove that is set at different lead angles and/or lead directions with respect to the lead direction and formed so that the second female screw body is screwed, the second spiral groove is , wherein the first spiral groove is formed so as to overlap at least a part of the region in which the first spiral groove is formed.

また、本発明の支持構造は、前記雄ねじ部が、適宜のリード角及び/又はリード方向に設定され、前記第一雌ねじ体を螺合し得るように形成された第一螺旋溝と、上記リード角及び/又はリード方向に対して相異なるリード角及び/又はリード方向に設定され、前記第二雌ねじ体を螺合し得るように形成された第二螺旋溝とを有し、上記第二螺旋溝は、上記第一螺旋溝が形成された領域の少なくとも一部の領域で重複するように形成され、前記嵌合機構は、上記第一雌ねじ体に嵌合し得る、前記第二雌ねじ体の外周面に仮固定された接合部材を有し、前記接合部材は、所定のトルクが付加されたとき、該接合部材における前記第二雌ねじ体に仮固定された部分が破壊され、前記第一雌ねじ体及び前記第二雌ねじ体に対して相対回転し、前記第一雌ねじ体及び前記第二雌ねじ体との接触部分の摩擦により溶融することを特徴とする。 In the support structure of the present invention, the male screw portion is set to an appropriate lead angle and/or lead direction, and a first spiral groove formed so that the first female screw body can be screwed; a second spiral groove that is set at a different lead angle and/or lead direction with respect to the angle and/or the lead direction and is formed so that the second female screw body can be screwed, the second spiral The groove is formed so as to overlap at least a part of the region in which the first spiral groove is formed, and the fitting mechanism is capable of fitting to the first female thread body, the second female thread body The joint member has a joint member temporarily fixed to the outer peripheral surface, and when a predetermined torque is applied to the joint member, the portion of the joint member temporarily fixed to the second female screw body is destroyed, and the first female screw is broken. It rotates relative to the body and the second female threaded body, and melts due to friction of the contact portion with the first female threaded body and the second female threaded body.

また、本発明の支持構造は、前記枢動機構が、前記支持端部に形成された軸方向外方に向かって凸曲面状を成す凸曲面端部と、上記凸曲面端部の曲面に沿って摺動可能に上記凸曲面端部に設けられ、前記被固定部材に当接する当接部を有することを特徴とする。 Further, in the support structure of the present invention, the pivoting mechanism includes a convex curved end portion formed in the support end portion and forming a convex curved surface shape outward in the axial direction, and a curved surface along the curved surface of the convex curved end portion. and a contact portion provided on the end portion of the convex curved surface so as to be slidable on the surface of the fixed member.

また、本発明の支持構造は、前記当接部が、前記被固定部材に対する当接部位に、弾性部材を有することを特徴とする。 Moreover, the support structure of the present invention is characterized in that the contact portion has an elastic member at a contact portion with respect to the member to be fixed.

また、本発明の支持構造は、前記軸部が、前記当接部を前記被固定部材側に付勢する付勢部を有することを特徴とする。 Moreover, the support structure of the present invention is characterized in that the shaft portion has an urging portion that urges the contact portion toward the fixed member.

また、本発明の支持構造は、前記第一雌ねじ体が、前記支持体の外側で、前記枢動機構を収容する収容空間を有することを特徴とする。 Moreover, the support structure of the present invention is characterized in that the first female screw has an accommodation space for accommodating the pivot mechanism outside the support.

また、本発明の支持構造は、前記第一雌ねじ体が、前記支持体に溶接されて固定されることを特徴とする。 Moreover, the support structure of this invention is characterized by the said 1st internal thread body being welded and fixed to the said support body.

また、本発明の支持構造は、前記軸部が、前記支持体に対して周回状に配列され、前記枢動機構を前記被固定部材に複数の方向から当接させることで、前記被固定部材に対して前記支持体を固定することを特徴とする。 Further, in the support structure of the present invention, the shaft portion is arranged in a circle with respect to the support, and the pivoting mechanism is brought into contact with the member to be fixed from a plurality of directions. characterized in that the support is fixed with respect to.

また、本発明の支持構造は、前記被固定部材が、筒形状を有する内管であり、 前記支持体は、上記内管を囲繞し得る筒形状を有する外管であることを特徴とする。 Further, the support structure of the present invention is characterized in that the member to be fixed is a cylindrical inner tube, and the support is a cylindrical outer tube that can surround the inner tube.

本発明によれば、簡易な構造によって、互いに固定される二つの部材の内、一方の部材を他方の部材に対して角度調節可能に構成すると共に、調節された角度位置を保持することができる。 According to the present invention, of two members fixed to each other, one member can be configured to be angularly adjustable with respect to the other member, and the adjusted angular position can be held by a simple structure. .

第一の実施形態に係る位置可調固定支持部材により内管に固定された外管を示す断面図である。FIG. 4 is a cross-sectional view showing the outer tube fixed to the inner tube by the position-adjustable fixing support member according to the first embodiment; 第一の実施形態に係る位置可調固定支持部材を示す断面図である。FIG. 3 is a cross-sectional view showing a position-adjustable fixed support member according to the first embodiment; 軸部の雄ねじ部を拡大して示した図である。It is the figure which expanded and showed the external thread part of the axial part. 位置可調固定支持部材の嵌合機構を示す断面図である。FIG. 4 is a cross-sectional view showing a fitting mechanism of the position-adjustable fixed support member; 第一雌ねじ体の(A)正面図、(B)平面図、(C)側面図、(D)斜視図である。They are (A) front view, (B) top view, (C) side view, and (D) perspective view of a first female screw body. 第二雌ねじ体の(A)斜視図、(B)平面図である。It is the (A) perspective view of a 2nd internal thread body, (B) It is a top view. 第一雌ねじ体と第二雌ねじ体の締結状態における、交差部分を示す(A)正面図、(B)第二雌ねじ体側を拡大して示す部分拡大斜視図である。It is the (A) front view which shows an intersection part in the fastening state of a 1st internal thread body and a 2nd internal thread body, (B) It is the partial expansion perspective view which expands and shows the 2nd internal thread body side. 第一の実施形態に係る位置可調固定支持部材を適用した二重管構造を示す外観図である。FIG. 4 is an external view showing a double pipe structure to which the position-adjustable fixed support member according to the first embodiment is applied; 第一の実施形態に係る位置可調固定支持部材を適用した二重管構造を示す断面図である。FIG. 4 is a cross-sectional view showing a double pipe structure to which the position-adjustable fixed support member according to the first embodiment is applied; 鉛直方向から傾斜した内管と鉛直に立設された外管とを示す断面図である。FIG. 4 is a cross-sectional view showing an inner tube that is inclined from the vertical direction and an outer tube that stands vertically. 位置可調固定支持部材の応用例で用いられる第一雌ねじ体と第二雌ねじ体を示す断面図である。It is sectional drawing which shows the 1st internal thread body and 2nd internal thread body which are used by the example of application of a position adjustable fixed support member. 枢動機構の他の構成を示す断面図である。FIG. 11 is a cross-sectional view showing another configuration of the pivoting mechanism; 第二の実施形態に係る位置可調固定支持部材を示す断面図である。FIG. 5 is a cross-sectional view showing a position-adjustable fixed support member according to a second embodiment; 角ワッシャの(A)平面図、(B)側面の断面図である。It is the (A) top view of an angle washer, (B) sectional drawing of the side. 第二雌ねじ体の(A)側面部分断面図、(B)底面図である。It is the (A) side surface fragmentary sectional view of a 2nd internal thread body, (B) bottom view. 挿嵌部材を有する位置可調固定支持部材を示す断面図である。FIG. 10 is a cross-sectional view of an adjustable fixed support member with inserts; 挿嵌部材の(A)他端部側から見た平面図、(B)側面の断面図である。It is the top view seen from the (A) other end part side of an insertion member, (B) sectional drawing of a side surface. 軸方向を外管の管軸に直交する方向から傾斜させた軸部を示す断面図である。FIG. 4 is a cross-sectional view showing a shaft portion whose axial direction is inclined from a direction perpendicular to the tube axis of the outer tube; 第三の実施形態に係る位置可調固定支持部材を示す断面図である。FIG. 11 is a cross-sectional view showing a position-adjustable fixed support member according to a third embodiment; 第三の実施形態に係る第二雌ねじ体の(A)側面部分断面図、(B)平面図である。It is the (A) side partial sectional view of the 2nd internal thread body which concerns on 3rd embodiment, (B) It is a top view. 嵌合機構の形成を段階的に示し、(a)第二雌ねじ体を軸部に挿通させる前の状態を示す図、(b)収納空間に環状凸部が嵌合した状態を示す図、(c)ナット形溶接部材が第一雌ねじ体及び第二雌ねじ体に対して回転している状態を示す図である。The formation of the fitting mechanism is shown in stages, (a) a diagram showing the state before the second female screw body is inserted into the shaft, (b) a diagram showing the state in which the annular protrusion is fitted into the storage space, ( c) It is a figure which shows the state which the nut-shaped welding member is rotating with respect to the 1st internal thread body and the 2nd internal thread body. 環状凸部の外周面、第二雌ねじ体の外周面及びナット形溶接部材の内周面の軸方向に対する傾斜角αが、(a)30°の場合を示す図、(b)45°の場合を示す図、(c)60°の場合を示す図である。Inclination angle α with respect to the axial direction of the outer peripheral surface of the annular projection, the outer peripheral surface of the second female screw body, and the inner peripheral surface of the nut-shaped welding member is (a) 30°, (b) 45° , and (c) a diagram showing the case of 60°. ナット形溶接部材の内周面が複合角度円錐台の形状を有する場合を示す図である。FIG. 10 is a view showing a case where the inner peripheral surface of the nut-shaped welding member has the shape of a compound-angle truncated cone; 第四の実施形態の位置可調固定支持部材を示す断面図である。FIG. 11 is a cross-sectional view showing a position adjustable fixed support member of a fourth embodiment; ハウジング部の他の形状を示す図である。It is a figure which shows the other shape of a housing part. 第一雌ねじ体とハウジング部を別体にした場合を示す図である。It is a figure which shows the case where a 1st internal thread body and a housing part are made into another body. 第一雌ねじ体に分離防止部を設けた場合を示す図である。It is a figure which shows the case where the separation prevention part was provided in the 1st internal thread body. ハウジング部の他の形状を示す図である。It is a figure which shows the other shape of a housing part. 凸曲面端部の他の形状を示す図である。It is a figure which shows the other shape of a convex-curved-surface edge part. 付勢部を形成した軸部の形状の例を示す図である。FIG. 4 is a diagram showing an example of the shape of a shaft portion having a biasing portion; 当接キャップと被支持部材を配設した二重管構造を示す図である。It is a figure which shows the double pipe structure which arrange|positioned the contact cap and the to-be-supported member.

以下に本発明の支持構造の実施形態を、図面を参照して説明する。図1は第一の実施形態に係る位置可調固定支持部材1を適用した二重管構造10の断面図、図2は第一の実施形態に係る位置可調固定支持部材1の断面図である。本発明の位置可調固定支持部材1は、二重管構造10の外管14の孔部16に軸部20を挿通し、枢動機構50が内管12に当接するものである。ここで二重管構造10は、立設する内管12と、内管12を囲繞する外管14とから成り、内管12の上部に外管14が位置可調固定支持部材1によって固定されている。また外管14には、複数の位置可調固定支持部材1が、外管14の管軸に沿って二列に、かつ管軸を中心に点対称に配設される。 Embodiments of the support structure of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a double pipe structure 10 to which the position-adjustable fixed support member 1 according to the first embodiment is applied, and FIG. 2 is a cross-sectional view of the position-adjustable fixed support member 1 according to the first embodiment. be. In the position adjustable fixed support member 1 of the present invention, the shaft portion 20 is inserted through the hole portion 16 of the outer tube 14 of the double tube structure 10 , and the pivoting mechanism 50 abuts against the inner tube 12 . Here, the double pipe structure 10 is composed of an upright inner pipe 12 and an outer pipe 14 surrounding the inner pipe 12, and the outer pipe 14 is fixed to the upper part of the inner pipe 12 by the position-adjustable fixed support member 1. ing. A plurality of position-adjustable fixed support members 1 are arranged in two rows along the tube axis of the outer tube 14 and symmetrically with respect to the tube axis.

位置可調固定支持部材1は、略円柱状の軸部20、第一雌ねじ体30、第二雌ねじ体40及び枢動機構50を具えている。軸部20には、外周面に雄ねじ部22、一端側に略球形状を有する凸曲面端部26、他端側に伝達端部28が形成される。軸部20は、外管14の内側に凸曲面端部26が位置するように孔部16に挿通される。 The position-adjustable fixed support member 1 includes a substantially cylindrical shaft portion 20 , a first internal thread body 30 , a second internal thread body 40 and a pivoting mechanism 50 . The shaft portion 20 has a male threaded portion 22 on its outer peripheral surface, a convex curved surface end portion 26 having a substantially spherical shape on one end side, and a transmission end portion 28 on the other end side. The shaft portion 20 is inserted through the hole portion 16 so that the convex curved end portion 26 is positioned inside the outer tube 14 .

第一雌ねじ体30は、軸部20の雄ねじ部22と螺合し、一端部が溶接により外管14の側壁に接合される。第二雌ねじ体40は、雄ねじ部22に螺合して第一雌ねじ体30よりも軸部20の伝達端部28側に配置される。第一雌ねじ体30と第二雌ねじ体40とが係合したとき、第一雌ねじ体30と第二雌ねじ体40との間には嵌合機構60が構成される。 The first female threaded body 30 is screwed with the male threaded portion 22 of the shaft portion 20, and one end thereof is joined to the side wall of the outer tube 14 by welding. The second female threaded body 40 is screwed into the male threaded portion 22 and arranged closer to the transmission end portion 28 side of the shaft portion 20 than the first female threaded body 30 . A fitting mechanism 60 is configured between the first female threaded body 30 and the second female threaded body 40 when the first female threaded body 30 and the second female threaded body 40 are engaged with each other.

枢動機構50は、軸部20の凸曲面端部26と、軸部20と別体で凸曲面端部26の曲面に沿って枢動可能な押圧部52と、凸曲面端部26と押圧部52との分離を防止する分離防止部54とにより構成される。押圧部52は有底の円筒形状を有し、内周面の底部に受圧面56、受圧面56の外側に当接部58が形成される。受圧面56は凸曲面端部26の曲面に沿った凹曲面形状を有して凸曲面端部26と面接触する。当接部58は、内管12に対して当接し得る部位(当接部位)が必須ではないが弾性部材により形成され、かつ内管12の側壁に沿った表面形状を有する構成としてもよい。 The pivoting mechanism 50 includes the convex curved end portion 26 of the shaft portion 20 , a pressing portion 52 that is separate from the shaft portion 20 and can pivot along the curved surface of the convex curved end portion 26 , the convex curved end portion 26 and the pressing portion 52 . and a separation prevention portion 54 that prevents separation from the portion 52 . The pressing portion 52 has a cylindrical shape with a bottom, and a pressure receiving surface 56 is formed on the bottom of the inner peripheral surface, and a contact portion 58 is formed on the outer side of the pressure receiving surface 56 . The pressure-receiving surface 56 has a concave curved surface shape along the curved surface of the convex curved surface end portion 26 and comes into surface contact with the convex curved surface end portion 26 . The abutting portion 58 may have a portion (abutting portion) that can abut against the inner tube 12 , but may be formed of an elastic member and have a surface shape along the side wall of the inner tube 12 .

分離防止部54は、特に形状は限定されないがここでは円板形状の外形を有し、軸部20を挿通させるための貫通孔を有する。分離防止部54は、押圧部52との間で凸曲面端部26を挟持するように押圧部52にかしめによって接合することも出来る。分離防止部54の貫通孔は、凸曲面端部26の基端との接触を避けるために外管14の外側に向かって拡径する形状を有し、これにより凸曲面端部26の基端部と分離防止部52との接触により決定される押圧部52の枢動範囲を広げている。 The separation preventing portion 54 has a disc-shaped outer shape here, although the shape is not particularly limited, and has a through hole for inserting the shaft portion 20 . The separation prevention portion 54 can also be joined to the pressing portion 52 by caulking so that the convex curved surface end portion 26 is sandwiched between the pressing portion 52 and the separation preventing portion 54 . The through-hole of the separation preventing portion 54 has a shape that expands outwardly of the outer tube 14 in order to avoid contact with the proximal end of the convex curved end portion 26 . The pivoting range of the pressing part 52 determined by the contact between the part and the separation preventing part 52 is widened.

軸部20の雄ねじ部22には、雄ねじ螺旋溝が形成され、本実施形態では、この雄ねじ部22に右ねじである第一雄ねじ螺旋溝23、及び左ねじである第二雄ねじ螺旋溝24の二種類の雄ねじ螺旋溝を同一領域上に重複して形成している。図3は雄ねじ部22を拡大して示した図である。雄ねじ部22には、軸心(ねじ軸)Cに垂直となる面方向に連続する略三日月状のねじ山22aが、雄ねじ部22の一方側(図の左側)及び他方側(図の右側)に交互に設けられており、ねじ山22aをこのように構成することで、右回りに旋回する螺旋溝及び左回りに旋回する螺旋溝の二種類の螺旋溝を、ねじ山22a同士の間に形成することが出来る。
本実施形態では、第一雄ねじ螺旋溝23及び第二雄ねじ螺旋溝24の二種類の雄ねじ螺旋溝を、雄ねじ部22に重畳形成している。従って、雄ねじ部22は、右ねじ及び左ねじの何れの雌ねじ体とも螺合することが可能となっている。なお、二種類の雄ねじ螺旋溝が形成された雄ねじ部22の詳細については、本願の発明者に係る特許第4663813号公報を参照されたい。
A male threaded portion 22 of the shaft portion 20 is formed with a male threaded spiral groove. Two types of male screw spiral grooves are formed overlapping on the same region. FIG. 3 is an enlarged view of the male screw portion 22. As shown in FIG. The male screw portion 22 has substantially crescent-shaped screw threads 22a continuous in a surface direction perpendicular to the axial center (screw axis) C on one side (left side in the figure) and the other side (right side in the figure) of the male screw part 22. By configuring the screw threads 22a in this way, two types of spiral grooves, a clockwise spiral groove and a counterclockwise spiral groove, can be formed between the screw threads 22a. can be formed.
In this embodiment, two types of male screw spiral grooves, a first male screw spiral groove 23 and a second male screw spiral groove 24 , are superimposed on the male threaded portion 22 . Therefore, the male threaded portion 22 can be screwed with both right-handed and left-handed female threads. For details of the male threaded portion 22 in which two types of male threaded helical grooves are formed, refer to Japanese Patent No. 4663813 of the inventor of the present application.

凸曲面端部26は、軸方向外方に向かって突出する凸曲面状を成し、具体的には、図2に示すように軸部20の軸径よりも大きい直径の略球形状を成しているが、凸曲面端部26の大きさは、これに限らず、軸部20の軸径と同等又はそれ以下に設定してもよい。伝達端部28は、工具と係合して工具からのトルクを軸部20へと伝達させる。 The convex curved surface end portion 26 has a convex curved surface shape protruding outward in the axial direction. Specifically, as shown in FIG. However, the size of the convex curved end portion 26 is not limited to this, and may be set equal to or smaller than the shaft diameter of the shaft portion 20 . The transmission end 28 engages the tool to transmit torque from the tool to the shank 20 .

ここでは工具としてのレンチと係合するために軸部20の他端部の一部を欠落して軸部20の回転軸を挟んで互いに平行な二つの面からなる二面幅が少なくとも一対以上形成してもよい。この場合、伝達端部28の断面の円弧部分の対角距離及び二面幅の寸法は軸部20の直径以下である。好ましくは雄ねじ部22の谷の径より小さく設定する。勿論、二面幅を設定することに限らず、凸型多角形や略星形等の凹凸型の多角形状に形成してもよい。 Here, a part of the other end of the shaft portion 20 is missing to engage with a wrench as a tool, and the width across flats formed by two surfaces parallel to each other across the rotation axis of the shaft portion 20 is at least one pair or more. may be formed. In this case, the dimensions of the diagonal distance and the width across flats of the circular arc portion of the cross section of the transmission end portion 28 are equal to or less than the diameter of the shaft portion 20 . Preferably, it is set to be smaller than the root diameter of the male threaded portion 22 . Of course, it is not limited to setting the width across flats, and may be formed in an uneven polygonal shape such as a convex polygon or a substantially star shape.

なお工具との係合手法は、様々に存在するが、例えば、スパナと係合するためには、伝達端部28の外形は六角形や凸型と凹型を含めた多角形等の多面形であっても良い。六角レンチ等の工具と係合するためには、伝達端部28が軸部20の他端部の端面に形成された六角穴や六角レンチ等の工具に対応した形状の穴であればよい。 There are various methods of engagement with a tool. For example, in order to engage with a wrench, the outer shape of the transmission end portion 28 should be a hexagon or a polyhedral shape including a convex shape and a concave shape. It can be. In order to engage with a tool such as a hexagonal wrench, the transmission end portion 28 may be a hexagonal hole formed in the end surface of the other end of the shaft portion 20 or a hole having a shape corresponding to the tool such as the hexagonal wrench.

第一雌ねじ体30は、特に限定されるものではないが、ここでは六角ナット形状を有し、軸方向に貫通するねじ孔を有する。第一雌ねじ体30のねじ孔には、右ねじとしての第一雌ねじ螺旋条が形成される。第一雌ねじ体30は、雄ねじ部22における第一雄ねじ螺旋溝23と螺合する。第一雌ねじ体30は、ねじ孔が外管14の孔部16と連通するように外管14の外面に溶接等によって固定される。 Although not particularly limited, the first female threaded body 30 has a hexagonal nut shape here and has a threaded hole penetrating in the axial direction. The threaded hole of the first female screw body 30 is formed with a first female screw helical thread as a right-handed screw. The first female screw body 30 is screwed into the first male screw helical groove 23 in the male screw portion 22 . The first female threaded body 30 is fixed to the outer surface of the outer tube 14 by welding or the like so that the threaded hole communicates with the hole portion 16 of the outer tube 14 .

第二雌ねじ体40は、特に限定されるものではないが、ここでは六角ナット形状を有し、軸方向に貫通するねじ孔を有する。第二雌ねじ体40のねじ孔には、左ねじとしての第二雌ねじ螺旋条が形成される。第二雌ねじ体40は、雄ねじ部22における第二雄ねじ螺旋溝24と螺合する。第二雌ねじ体40は、軸部20において、第一雌ねじ体30よりも他端側に配置される。 Although not particularly limited, the second female threaded body 40 has a hexagonal nut shape here and has a threaded hole penetrating in the axial direction. A second female screw thread as a left-handed screw is formed in the threaded hole of the second female screw body 40 . The second female thread body 40 is screwed into the second male thread spiral groove 24 in the male thread portion 22 . The second female threaded body 40 is arranged on the other end side of the shaft portion 20 relative to the first female threaded body 30 .

なお、第一雌ねじ体30の第一雌ねじ螺旋条が右ねじ、第二雌ねじ体40の第二雌ねじ螺旋条が左ねじであるものとして説明したが、これに限定されるものではなく、第一雌ねじ螺旋条が左ねじ、第二雌ねじ螺旋条が右ねじであってもよい。
また、第一雌ねじ体30と第二雌ねじ体40の外形は、同等としてもよいが、一方を他方より大きく、例えば一方の外縁に他方の外縁が外接するように設定して螺合時の回転を妨げないように構成してもよい。
Although the first female screw thread of the first female thread body 30 is a right-hand thread and the second female thread thread of the second female thread body 40 is a left-hand thread, it is not limited to this. The female spiral thread may be left-handed, and the second female spiral thread may be right-handed.
In addition, the first female threaded body 30 and the second female threaded body 40 may have the same external shape, but one is larger than the other, for example, the outer edge of one is set so that the outer edge of the other is in contact with the outer edge of the other. may be configured so as not to interfere with

次に嵌合機構60について説明する。図4に示すように嵌合機構60は、第一雌ねじ体30の外側端面30Aに形成される環状凸部(第一嵌合部)32と、第二雌ねじ体40の内側端面40Aに形成される、環状凸部32を収容する環状凹部(第二嵌合部)42を有する。第一雌ねじ体30の環状凸部32の外周面は、軸方向Jに沿って径方向Kに拡径又は縮径するテーパ面となる。ここでは外周面が軸方向Jの外側(第二雌ねじ体40側)に向かって縮径する。即ち環状凸部32の外径は、基端側から先端側にかけて縮径する。 Next, the fitting mechanism 60 will be described. As shown in FIG. 4, the fitting mechanism 60 is formed on the annular convex portion (first fitting portion) 32 formed on the outer end surface 30A of the first female threaded body 30 and the inner end surface 40A of the second female threaded body 40. It has an annular concave portion (second fitting portion) 42 that accommodates the annular convex portion 32 . The outer peripheral surface of the annular convex portion 32 of the first female screw body 30 is a tapered surface that expands or contracts in the radial direction K along the axial direction J. As shown in FIG. Here, the outer peripheral surface is reduced in diameter toward the outside in the axial direction J (toward the second female threaded body 40). That is, the outer diameter of the annular convex portion 32 is reduced from the proximal side to the distal side.

図5に示すように、第一雌ねじ体30の環状凸部32の外周面には、周方向Sに移動するにつれて、軸方向J又は径方向Kに変位する第一条部36が形成される。この第一条部36は帯状の列状突起を成し、図5(A)に示すように、突起の帯の長手方向Lが、周方向Sに移動するにつれて軸方向Jに変位する。同時に、図5(B)に示すように、第一条部36は、突起の帯の長手方向Lが周方向Sに移動するにつれて径方向Kに変位する。つまり、第一条部36は軸方向Jと径方向Kの双方に変位する突起となる。第一条部36は、周方向に均等間隔で複数形成され、ここでは三十条の第一条部36が周方向に12°の相対位相差をもって等間隔に形成される。 As shown in FIG. 5, on the outer peripheral surface of the annular convex portion 32 of the first female threaded body 30, as it moves in the circumferential direction S, a first thread portion 36 that is displaced in the axial direction J or radial direction K is formed. . The first line portion 36 forms a band-shaped row-like projection, and as shown in FIG. At the same time, as shown in FIG. 5B, the first line portion 36 is displaced in the radial direction K as the longitudinal direction L of the band of the projection moves in the circumferential direction S. As shown in FIG. That is, the first streak portion 36 serves as a projection that is displaced in both the axial direction J and the radial direction K. As shown in FIG. A plurality of first line portions 36 are formed at equal intervals in the circumferential direction, and here, thirty first line portions 36 are formed at equal intervals in the circumferential direction with a relative phase difference of 12°.

図6(A)、(C)に示すように、第二雌ねじ体40の環状凹部42の内周面は、軸方向Jに沿って径方向Kに拡径又は縮径するテーパ面となる。ここでは、内周面が、軸方向Jの内側(第一雌ねじ体30側)に向かって拡径しており、環状凸部32の外周面と平行な面となる。即ち環状凹部42の内径は、底面から開口部に向かって拡径する。 As shown in FIGS. 6A and 6C, the inner peripheral surface of the annular concave portion 42 of the second female threaded body 40 is a tapered surface that expands or contracts in the radial direction K along the axial direction J. As shown in FIGS. Here, the inner peripheral surface is diameter-expanded toward the inner side (first female screw body 30 side) in the axial direction J and becomes a surface parallel to the outer peripheral surface of the annular convex portion 32 . That is, the inner diameter of the annular recess 42 increases from the bottom toward the opening.

この内周面には、第二条部46が形成される。この第二条部46は帯状の列状突起となっており、図6(D)に示すように、突起の帯の長手方向Lが、軸方向Jと略一致する。同時に、第二条部46は、図6(B)に示すように、突起の帯の長手方向Lが径方向Kに変位する。つまり、軸方向Jと径方向Kの双方に変位する突起となる。この第二条部46は、周方向に均等間隔で複数形成される。ここでは三十条の第二条部46が周方向に12°の相対位相差をもって等間隔に形成される。 A second line portion 46 is formed on the inner peripheral surface. The second line portion 46 is a band-shaped row-like projection, and the longitudinal direction L of the band of the projection substantially coincides with the axial direction J, as shown in FIG. At the same time, the second ridge portion 46 is displaced in the radial direction K in the longitudinal direction L of the band of the projection, as shown in FIG. 6(B). That is, the protrusions are displaced in both the axial direction J and the radial direction K. FIG. A plurality of second line portions 46 are formed at equal intervals in the circumferential direction. Here, thirty second line portions 46 are formed at equal intervals in the circumferential direction with a relative phase difference of 12°.

なお、第一雌ねじ体30と第二雌ねじ体40が当接状態となる際、第一条部36が変位する方向と、第二条部46が変位する方向とが異なっているため、第一条部36と第二条部46は、互いの突起同士が接触する交差部分70(図7(A)参照)が作出される。 In addition, when the first female threaded body 30 and the second female threaded body 40 are in a contact state, the direction in which the first thread portion 36 is displaced and the direction in which the second thread portion 46 is displaced are different. Intersection portions 70 (see FIG. 7(A)) are created where the projections of the streaks 36 and the second streaks 46 contact each other.

図7(B)に示すように、第一条部36と第二条部46は、締結力を利用して互いに押圧される。結果、第一条部36には、弾性変形及び/又は塑性変形によって径方向内側に凹む第一変位部38が作出される。また第二条部46には、弾性変形及び/又は塑性変形によって径方向外側に凹む第二変位部48が作出される。 As shown in FIG. 7B, the first line portion 36 and the second line portion 46 are pressed against each other using the fastening force. As a result, a first displacement portion 38 that is recessed radially inward is created in the first line portion 36 by elastic deformation and/or plastic deformation. A second displacement portion 48 that is recessed radially outward is created in the second line portion 46 by elastic deformation and/or plastic deformation.

なお、図7(B)では、模式的に、単一の第一条部36と単一の第二条部46とが交差することで互いに凹み(第一変位部38、第二変位部48)を形成する場合を示しているが、実際には、第一条部36が複数の第二条部46、或いは第二条部46が複数の第一条部36と交差する場合もある。従って、第一条部36(第二条部46)には、複数の第一変位部38(第二変位部48)が形成される場合もある。 Note that in FIG. 7B, the single first line portion 36 and the single second line portion 46 are schematically shown to intersect with each other to dent each other (the first displacement portion 38, the second displacement portion 48 ), in practice, the first line portion 36 may intersect with a plurality of second line portions 46 or the second line portion 46 may intersect with a plurality of first line portions 36 . Therefore, a plurality of first displacement portions 38 (second displacement portions 48) may be formed in the first ridge portion 36 (second ridge portion 46).

図7(A)に示すように、第一条部36及び第二条部46の表面において、複数の交差部分70が、ねじ部の1ピッチ以上の軸方向範囲(領域)Wに亘って存在する。交差部分70では、第一条部36と第二条部46とが互いにくい込んだ状態で第一変位部38及び第二変位部48が作出され、これによって第一雌ねじ体30と第二雌ねじ体40との嵌合状態を保持する効果を発揮できる。第一変位部38及び第二変位部48が、軸方向に1ピッチ以上の範囲に亘って形成されることで、第二雌ねじ体40が、緩み方向に1回転する際に、あらゆる位相において常に、当該回転が抑制され、嵌合状態の保持効果を発揮できる。 As shown in FIG. 7A, on the surfaces of the first thread portion 36 and the second thread portion 46, a plurality of crossing portions 70 exist over an axial range (area) W of one or more pitches of the threaded portion. do. At the intersecting portion 70, the first and second displacement portions 38 and 48 are created with the first and second ridges 36 and 46 wedged into each other, thereby creating the first female thread 30 and the second female thread 30 and 48, respectively. The effect of maintaining the fitted state with 40 can be exhibited. The first displacement portion 38 and the second displacement portion 48 are formed over a range of one pitch or more in the axial direction, so that when the second female screw body 40 rotates once in the loosening direction, it is always in any phase , the rotation is suppressed, and the effect of retaining the fitted state can be exhibited.

なお、環状凸部32と環状凹部42を他の構成とすることもできる。例えば第二雌ねじ体40の環状凹部42の内周面を第二雌ねじ体40のねじ孔の中心からの距離が周方向に沿って変動する形状とする。具体的には図11に示すように、環状凸部32は、軸心が第一雌ねじ体30のねじ孔の軸心と一致し、外周面80が基端側から先端側に向かって縮径するテーパ面とする。一方、環状凹部42は、軸心が第二雌ねじ体40の雌ねじの軸心に対して偏心し、内周面82が底面側から開口部側に向かって拡径するテーパ面であって環状凸部32の外周面80と平行な面となる。従って、環状凹部42に環状凸部32が嵌入したとき、環状凹部42の内周面82と環状凸部32の外周面80とが当接し、嵌入を進めることにより、第一雌ねじ体30を押圧する図11に示す矢印a方向の力が増大する。これにより第二雌ねじ体40の締め込み量の増加に伴い、環状凹部42と環状凸部32との接触部分において、軸心に直交する方向に互いを圧迫する力が増加し、第一雌ねじ体30と第二雌ねじ体40の嵌合状態の保持効果を発揮できる。 It should be noted that the annular convex portion 32 and the annular concave portion 42 may have other configurations. For example, the inner peripheral surface of the annular recessed portion 42 of the second female threaded body 40 is shaped such that the distance from the center of the screw hole of the second female threaded body 40 varies along the circumferential direction. Specifically, as shown in FIG. 11 , the annular protrusion 32 has an axial center that coincides with the axial center of the screw hole of the first female screw body 30 , and the outer peripheral surface 80 decreases in diameter from the proximal side to the distal side. tapered surface. On the other hand, the annular concave portion 42 has an axial center eccentric with respect to the axial center of the female thread of the second female threaded body 40, and an inner peripheral surface 82 that is a tapered surface that expands in diameter from the bottom side toward the opening side and is an annular convex. It becomes a surface parallel to the outer peripheral surface 80 of the portion 32 . Therefore, when the annular convex portion 32 is fitted into the annular concave portion 42, the inner peripheral surface 82 of the annular concave portion 42 and the outer peripheral surface 80 of the annular convex portion 32 come into contact with each other, and the first female thread body 30 is pressed by advancing the fitting. The force in the direction of arrow a shown in FIG. As a result, as the amount of tightening of the second female thread body 40 increases, the contact portion between the annular concave portion 42 and the annular convex portion 32 presses each other in the direction perpendicular to the axis. 30 and the second female screw body 40 can exhibit the effect of holding the fitted state.

なお、環状凹部42の内周面がねじの軸心に対して偏心した円形状であるものとして説明したが、これに限定されるものではなく、環状凸部32の外周面がねじの軸心に対して偏心した円形状であってもよく、また環状凸部32の外周面及び環状凹部42の内周面がねじの軸心に対して偏心した円形状であってもよい。 Although the inner peripheral surface of the annular recessed portion 42 has been described as being circular eccentrically with respect to the axis of the screw, the present invention is not limited to this. Alternatively, the outer peripheral surface of the annular projection 32 and the inner peripheral surface of the annular recess 42 may be circular eccentric to the axis of the screw.

また、環状凸部32と環状凹部42の他の構成として、例えば環状凸部32の縦断面の外形をなす輪郭形状と、環状凹部42の縦断面の内形をなす輪郭形状とが互いに異なるように設定する。具体的には基端から先端にかけて縮径した環状凸部32の外周面の軸方向に対する傾斜角と、開口面から底面にかけて縮径した環状凹部42の内周面の軸方向に対する傾斜角とが、互いに異なるように設定したものであってもよい。この場合、基端側から先端側にかけて縮径した環状凸部32の外周面の軸方向に対する傾斜角に対し、開口面から底面にかけて縮径した環状凹部42の内周面の軸方向に対する傾斜角を小さく設定することで、環状凹部42に対する環状凸部32の嵌入を徐々に進める際に自ずと環状凸部32に対する環状凹部42による締付けが増大し次第に弾性変形を伴うようにすることが可能となる。 Further, as another configuration of the annular projection 32 and the annular recess 42, for example, the contour shape forming the outer shape of the longitudinal section of the annular projection 32 and the contour shape forming the inner shape of the longitudinal section of the annular recess 42 are different from each other. set to Specifically, the inclination angle with respect to the axial direction of the outer peripheral surface of the annular projection 32 whose diameter is reduced from the base end to the tip, and the inclination angle with respect to the axial direction of the inner peripheral surface of the annular recess 42 whose diameter is reduced from the opening surface to the bottom surface. , may be set differently from each other. In this case, the inclination angle with respect to the axial direction of the inner peripheral surface of the annular concave portion 42 with the diameter reduced from the opening surface to the bottom surface is the angle of inclination with respect to the axial direction of the outer peripheral surface of the annular convex portion 32 whose diameter is reduced from the base end side to the distal end side. is set small, when the annular protrusion 32 is gradually fitted into the annular recess 42, the tightening of the annular protrusion 32 by the annular recess 42 naturally increases, and elastic deformation gradually occurs. .

また、環状凸部32と環状凹部42の他の構成として、例えば環状凸部32の外周面と環状凹部42の内周面とに鋸歯状に形成された係合部を設けてもよい。この場合、環状凹部42に対する環状凸部32の嵌入時、第二雌ねじ体40の締付け方向において回転が許容され、緩み方向の回転が防止されるように歯の方向を設定する。また歯幅は、環状凸部32の外周面において基端側で広く、先端に向かって狭まるように設定し、環状凹部42において底面側で狭く、開口端に向かって広がるように設定する。また係合部の数量は少なくとも一つ設けられていればよく、特に限定されるものではない。例えば等ピッチで複数設けるようにしてもよい。また係合部の鋸歯形状も特に限定されるものではなく、例えば多条ねじのようにスパイラル状に形成されたものであってもよい。 As another configuration of the annular projection 32 and the annular recess 42, for example, an engaging portion formed in a sawtooth shape may be provided on the outer peripheral surface of the annular projection 32 and the inner peripheral surface of the annular recess 42. In this case, the direction of the teeth is set so that when the annular convex portion 32 is fitted into the annular concave portion 42, rotation in the tightening direction of the second female screw body 40 is permitted and rotation in the loosening direction is prevented. The tooth width is set so that it is wide on the base end side and narrows toward the tip on the outer peripheral surface of the annular convex portion 32, and is narrow on the bottom side of the annular concave portion 42 and is set so that it widens toward the opening end. Moreover, the number of engaging portions is not particularly limited as long as at least one is provided. For example, a plurality of them may be provided at equal pitches. Also, the sawtooth shape of the engaging portion is not particularly limited, and may be, for example, a spiral shape like a multi-start screw.

次に、位置可調固定支持部材1の外管14への取付けについて説明する。まず凸曲面端部26側において枢動機構50を構成した軸部20が孔部16に挿通される。このとき軸部20は、外管14の内側から伝達端部28を挿入端として孔部16に挿通され、軸方向を外管14の管軸に直交させ配置される。次に第一雌ねじ体30を軸部20に沿って移動させ外管14の側壁に固定する。即ち外管14の外側から第一雌ねじ体30を軸部20の雄ねじ部22に螺合させて外管14に当接する位置に移動させ、溶接により外管14の側壁に固定する。 Next, the attachment of the position-adjustable fixed support member 1 to the outer tube 14 will be described. First, the shaft portion 20 that constitutes the pivoting mechanism 50 is inserted through the hole portion 16 on the convex curved surface end portion 26 side. At this time, the shaft portion 20 is inserted through the hole portion 16 from the inside of the outer tube 14 with the transmission end portion 28 as an insertion end, and is arranged so that the axial direction is perpendicular to the tube axis of the outer tube 14 . Next, the first female threaded body 30 is moved along the shaft portion 20 and fixed to the side wall of the outer tube 14 . That is, the first female threaded body 30 is screwed onto the male threaded portion 22 of the shaft portion 20 from the outside of the outer tube 14, moved to a position where it contacts the outer tube 14, and fixed to the side wall of the outer tube 14 by welding.

なお、軸部20及び第一雌ねじ体30を外管14に取付ける手順は、上記手順に限定されるものではない。例えば、最初に第一雌ねじ体30を、ねじ孔が孔部16と連通するように外管14の側壁に固定し、伝達端部28を挿入端として軸部20を外管14の内側から孔部16に挿通し、軸部20の雄ねじ部22を第一雌ねじ体30に螺合させるようにしてもよい。 The procedure for attaching the shaft portion 20 and the first female threaded body 30 to the outer pipe 14 is not limited to the procedure described above. For example, first, the first female threaded body 30 is fixed to the side wall of the outer tube 14 so that the threaded hole communicates with the hole portion 16, and the transmission end portion 28 is used as an insertion end to insert the shaft portion 20 into the hole from the inside of the outer tube 14. The male threaded portion 22 of the shaft portion 20 may be screwed into the first female threaded body 30 by inserting it through the portion 16 .

第二雌ねじ体40は、第一雌ねじ体30の外側から雄ねじ部22に螺合し、後述する軸部20の軸方向位置の調整のために第一雌ねじ体30から所定の間隔を存して配置される。以上により位置可調固定支持部材1の外管14への取付けが完了する。 The second female threaded body 40 is screwed into the male threaded portion 22 from the outside of the first female threaded body 30, and is spaced from the first female threaded body 30 at a predetermined distance for adjusting the axial position of the shaft portion 20, which will be described later. placed. Thus, the attachment of the position-adjustable fixed support member 1 to the outer tube 14 is completed.

次に位置可調固定支持部材1における軸部20の軸方向位置の調整及び固定について説明する。第二雌ねじ体40が第一雌ねじ体30から所定の間隔を存して配置されているとき、締結工具を伝達端部28に係合させ軸部20にトルクを付加したとき、軸部20は第一雌ねじ体30と相対的に回転し軸方向に移動する。これにより軸部20の軸方向位置が調整可能となる。 Next, adjustment and fixing of the axial position of the shaft portion 20 in the position-adjustable fixed support member 1 will be described. When the second female threaded body 40 is arranged at a predetermined distance from the first female threaded body 30, when a fastening tool is engaged with the transmission end portion 28 and torque is applied to the shaft portion 20, the shaft portion 20 is It rotates relative to the first female screw body 30 and moves in the axial direction. Thereby, the axial position of the shaft portion 20 can be adjusted.

これに対して、第一雌ねじ体30と第二雌ねじ体40とが当接状態であって、第一雌ねじ体30の環状凸部32が第二雌ねじ体40の環状凹部42に嵌合しているとき、軸部20の軸方向位置は固定される。具体的には、軸部20を一端側(内管12側)に進行させる方向のトルクが付加されたとき、それに連れて第二雌ねじ体40は第一雌ねじ体30側に移動する。しかし第二雌ねじ体40は、第一雌ねじ体30と当接しているため、移動が規制される。従って第二雌ねじ体40が固定されて回転せず、軸部20は、回転が規制されて一端側への移動が規制される。 On the other hand, the first female threaded body 30 and the second female threaded body 40 are in a contact state, and the annular convex portion 32 of the first female threaded body 30 is fitted into the annular concave portion 42 of the second female threaded body 40. 2, the axial position of the shank 20 is fixed. Specifically, when the torque of the direction which makes the axial part 20 advance to the one end side (inner pipe|tube 12 side) is added, the 2nd internal thread body 40 moves to the 1st internal thread body 30 side in connection with it. However, since the second female threaded body 40 is in contact with the first female threaded body 30, its movement is restricted. Therefore, the second female threaded body 40 is fixed and does not rotate, and the shaft portion 20 is restricted from rotating and from moving to the one end side.

また、軸部20を他端側(外管14の外側)に進行させる方向のトルクが付加されたとき、それに連れて第二雌ねじ体40は第一雌ねじ体30に対して緩み方向に回転しようとする。しかし第二雌ねじ体40は、上述した嵌合機構60による環状凸部32と環状凹部42との嵌合状態の保持効果により回転が規制される。従って第二雌ねじ体40が固定されて回転せず、軸部20は回転が規制されて他端側への移動が規制される。 Further, when a torque is applied in a direction to advance the shaft portion 20 to the other end side (outside of the outer tube 14), the second female threaded body 40 will rotate in the loosening direction with respect to the first female threaded body 30. and However, rotation of the second female threaded body 40 is restricted by the holding effect of the fitting state between the annular projection 32 and the annular recess 42 by the fitting mechanism 60 described above. Therefore, the second female threaded body 40 is fixed and does not rotate, and the rotation of the shaft portion 20 is restricted to restrict movement to the other end side.

上述したように軸方向位置の調整は、軸部20を第一雌ねじ体30に対して回転させることにより行う。また軸方向位置の固定は、外管14に固定した第一雌ねじ体30に第二雌ねじ体40を当接させ、環状凸部32を環状凹部42に嵌合させて嵌合機構60を形成し、第二雌ねじ体40の回転を規制することにより行う。従って第一雌ねじ体30、第二雌ねじ体40、係合機構60が軸部20の軸方向位置を調整可能に固定し得る位置可調固定機構として作用する。 As described above, the adjustment of the axial position is performed by rotating the shaft portion 20 with respect to the first female screw body 30 . The axial position is fixed by bringing the second female threaded body 40 into contact with the first female threaded body 30 fixed to the outer tube 14 and fitting the annular convex portion 32 into the annular concave portion 42 to form a fitting mechanism 60. , by restricting the rotation of the second female screw body 40 . Therefore, the first female threaded body 30, the second female threaded body 40, and the engaging mechanism 60 act as a position-adjustable fixing mechanism capable of fixing the axial position of the shaft portion 20 in an adjustable manner.

位置可調固定支持部材1を取付けた外管14は、内管12を囲繞するように内管12上部に配される。具体的にはまず内管12を囲繞するように外管14の位置合わせを行い、各位置可調固定支持部材1の軸部20は、伝達端部28に係合させた締結工具からトルクが付加されることで回転し、枢動機構50の押圧部52が内管12を所定の押圧力で押圧する位置まで移動する。そして図2に示すように第一雌ねじ体30の環状凸部32に第二雌ねじ体40の環状凹部42を嵌合させ嵌合機構60が形成されたときに、各位置可調固定支持部材1の軸部20は、軸回りのトルクや軸力が作用しても、嵌合機構60によって軸部20の回転並びに軸方向位置が規制され固定される。 The outer tube 14 to which the position-adjustable fixed support member 1 is attached is arranged above the inner tube 12 so as to surround the inner tube 12 . Specifically, first, the outer tube 14 is aligned so as to surround the inner tube 12 , and the shaft portion 20 of each position-adjustable fixed support member 1 receives torque from a fastening tool engaged with the transmission end portion 28 . By being applied, it rotates, and the pressing portion 52 of the pivoting mechanism 50 moves to a position where it presses the inner tube 12 with a predetermined pressing force. Then, as shown in FIG. 2, when the fitting mechanism 60 is formed by fitting the annular recess 42 of the second female screw 40 to the annular protrusion 32 of the first female screw 30, each position adjustable fixed support member 1 The shaft portion 20 is fixed by the fitting mechanism 60 by restricting the rotation and the axial position of the shaft portion 20 even if a torque or axial force around the shaft acts on the shaft portion 20 .

位置可調固定支持部材1は、二重管構造の大きさや用途等により適宜設置数が設定される。例えば外管14が内管12に対して位置がずれることなく、確実に荷重を支えることを要する二重管構造10の場合には、図8に示すように、外管14の周方向に沿って所定の間隔を存して位置可調固定支持部材1を配置することが好ましい。その場合の具体的な外管14の構成について説明する。図9に示すように外管14の側壁には、位置可調固定支持部材1を設置するための複数の孔部16が貫穿されている。孔部16は、外管14の側壁の全周に亘って所定の間隔を存して設けられ、ここでは八個の孔部16が周方向に45°の相対位相差を以って等間隔に形成される。更に周方向に沿って形成された八個の孔部16は、外管14の軸方向に沿って平行に二列形成される。従って外管14には、十六個の孔部16が形成される。 The number of the position-adjustable fixed support members 1 to be installed is appropriately set according to the size of the double-pipe structure, the application, and the like. For example, in the case of a double-pipe structure 10 that requires the outer tube 14 to reliably support the load without being misaligned with respect to the inner tube 12, as shown in FIG. It is preferable to dispose the position-adjustable fixed support members 1 at predetermined intervals. A specific configuration of the outer tube 14 in that case will be described. As shown in FIG. 9, the side wall of the outer tube 14 is perforated with a plurality of holes 16 for installing the adjustable fixed support member 1 . The holes 16 are provided at predetermined intervals along the entire circumference of the side wall of the outer tube 14. Here, the eight holes 16 are equally spaced with a relative phase difference of 45° in the circumferential direction. formed in Furthermore, the eight holes 16 formed along the circumferential direction are formed in two parallel rows along the axial direction of the outer tube 14 . Therefore, 16 holes 16 are formed in the outer tube 14 .

このように、位置可調固定支持部材1は、外管14の側壁の周方向に45°の相対位相差を以って等間隔で且つ外管14の管軸方向に二列に配設される。更に各位置可調固定支持部材1は、押圧部52により内管12を押圧するので、複数の位置可調固定支持部材1が内管12の全周に亘って押圧力を付加した状態となる。これにより、外管14は、複数の位置可調固定支持部材1によって支持され、内管12に対して所定位置に固定される。 In this manner, the position-adjustable fixed support members 1 are arranged in two rows in the axial direction of the outer tube 14 at regular intervals with a relative phase difference of 45° in the circumferential direction of the side wall of the outer tube 14 . be. Further, since each position-adjustable fixed support member 1 presses the inner tube 12 by the pressing portion 52, the plurality of position-adjustable fixed support members 1 apply pressing force over the entire circumference of the inner tube 12. . As a result, the outer tube 14 is supported by the plurality of position-adjustable fixed support members 1 and fixed at a predetermined position with respect to the inner tube 12 .

また、複数の位置可調固定支持部材1を等間隔に配置した為、内管12に複数の位置可調固定支持部材1から付与される半径方向の押圧力が互いを相殺して、内管12と複数の位置可調固定支持部材1との間に相対的な偏心力が作用することを抑制できる。これにより外管14は、内管12に取付けられた状態のまま維持される。 In addition, since the plurality of position-adjustable fixed support members 1 are arranged at equal intervals, the radial pressing forces applied to the inner pipe 12 from the plurality of position-adjustable fixed support members 1 cancel each other, and the inner pipe Effect of relative eccentric force between 12 and the plurality of position-adjustable fixed support members 1 can be suppressed. This keeps the outer tube 14 attached to the inner tube 12 .

次に位置可調固定支持部材1による外管14の角度調節について説明する。複数の位置可調固定支持部材1は、各々の軸部20の軸方向位置を変えることにより、外管14を内管12に傾斜させて固定できる。例えば図10に示すように右側に傾斜した内管12に外管14を鉛直方向に立設する場合、複数の位置可調固定支持部材1の内、図10における外管14の右下及び左上に位置する位置可調固定支持部材1の軸部20の軸方向位置を調整する。即ち外管14の右下及び左上に位置する位置可調固定支持部材1の凸曲面端部26を他の位置可調固定支持部材1の凸曲面端部26よりも内管12の軸心側に配置するように軸部20を固定する。このように内管12が鉛直方向から右に傾斜しているとき、外管14が左に傾斜するように各位置可調固定支持部材1の軸方向位置を変えることで外管14を確実に鉛直方向に立設できる。 Next, angle adjustment of the outer tube 14 by the position-adjustable fixed support member 1 will be described. The plurality of position-adjustable fixed support members 1 can tilt and fix the outer tube 14 to the inner tube 12 by changing the axial position of each shaft portion 20 . For example, as shown in FIG. 10, when the outer tube 14 is installed vertically on the inner tube 12 inclined to the right as shown in FIG. Adjust the axial position of the shaft portion 20 of the position-adjustable fixed support member 1 located at . That is, the convex curved end portions 26 of the position adjustable fixed support members 1 located at the lower right and upper left of the outer tube 14 are positioned closer to the axis of the inner tube 12 than the convex curved end portions 26 of the other position adjustable fixed support members 1. The shaft portion 20 is fixed so as to be arranged in the position. When the inner tube 12 is inclined to the right from the vertical direction in this way, the outer tube 14 can be securely fixed by changing the axial position of each position-adjustable fixed support member 1 so that the outer tube 14 is inclined to the left. Can be installed vertically.

このとき押圧部52は、凸曲面端部26の曲面に沿って枢動可能であるため、内管12が鉛直方向から傾斜した場合でも、当接部58が対向する内管12の側壁に沿うように枢動する。即ち内管12に対して外管14を傾斜させたときに、位置可調固定支持部材1の枢動機構50は、押圧部52が内管12の傾斜に追随するように枢動し、当接部58が内管12に確実に当接する。従って本実施形態の位置可調固定支持部材1によれば、外管14を内管12に対して傾斜させた姿勢を維持するように固定することができる。 At this time, since the pressing portion 52 can pivot along the curved surface of the convex curved end portion 26, even if the inner tube 12 is tilted from the vertical direction, the contact portion 58 can move along the opposing side wall of the inner tube 12. pivot like That is, when the outer tube 14 is tilted with respect to the inner tube 12, the pivoting mechanism 50 of the position-adjustable fixed support member 1 pivots such that the pressing portion 52 follows the tilt of the inner tube 12, thereby The contact portion 58 reliably contacts the inner tube 12 . Therefore, according to the position-adjustable fixed support member 1 of the present embodiment, the outer tube 14 can be fixed so as to maintain an inclined posture with respect to the inner tube 12 .

また、枢動機構50は、内管12から軸部20の軸方向に沿った入力を受容する。例えば外管14が振動した場合、その振動に連れて位置可調固定支持部材1が内管12に対して振動するため、位置可調固定支持部材1には、内管12から軸方向や軸方向周りの力が付加される。このとき枢動機構50の押圧部52が振動に追随するように枢動して当接部58の弾性部材が振動を吸収するので、位置可調固定支持部材1に作用する軸方向及び軸方向周りの入力が受容され、押圧部52による内管12を押圧する状態が維持される。 Pivoting mechanism 50 also receives input along the axial direction of shaft 20 from inner tube 12 . For example, when the outer tube 14 vibrates, the position adjustable fixed support member 1 vibrates with respect to the inner tube 12 along with the vibration. A force around the direction is added. At this time, the pressing portion 52 of the pivoting mechanism 50 pivots so as to follow the vibration, and the elastic member of the contact portion 58 absorbs the vibration. The surrounding input is received, and the state of pressing the inner tube 12 by the pressing portion 52 is maintained.

以上説明したように、第一の実施形態の位置可調固定支持部材1によれば、各軸部20の軸方向位置を変えることにより、外管14を内管12に対して所定位置で且つ内管12に対して傾斜させて配置することができる。従って内管12が鉛直方向から傾斜している場合、軸部20ごとの軸方向位置を変えることで外管14を鉛直方向に立設させることができる。そのため二重管構造が机、椅子等のパイプ脚部や、建造物の脚部等である場合に、外管14の上方に構成される机、椅子等の天板や、建造物の上部構造物等が、脚部の傾斜により設計された姿勢から傾斜して構成されてしまうことを防止し、天板や上部構造物等を設計された姿勢や、所望の姿勢で設置することができる。 As described above, according to the position-adjustable fixed support member 1 of the first embodiment, by changing the axial position of each shaft portion 20, the outer tube 14 can be positioned at a predetermined position with respect to the inner tube 12 and It can be arranged obliquely with respect to the inner tube 12 . Therefore, when the inner tube 12 is inclined from the vertical direction, the outer tube 14 can be erected vertically by changing the axial position of each shaft portion 20 . Therefore, when the double pipe structure is a pipe leg of a desk, chair, etc., or a leg of a building, etc., the top plate of a desk, chair, etc. configured above the outer tube 14, or the upper structure of the building To prevent an object or the like from being constructed in a tilted posture from a designed posture due to the tilting of legs, and to install a top plate, an upper structure, etc. in a designed posture or a desired posture.

なお、第一の実施形態において、雄ねじ部22が右ねじである第一雄ねじ螺旋溝23、及び左ねじである第二雄ねじ螺旋溝24の二種類の雄ねじ螺旋溝を同一領域上に重複して形成しているものとして説明したが、右ねじ又は左ねじの何れか一方のみを形成したものであってもよい。この場合雄ねじ部22に形成された雄ねじ螺旋溝に対応する雌ねじ螺旋条が第一雌ねじ体30及び第二雌ねじ体40に形成される。また二種類の雄ねじ螺旋溝は、互いに異なるピッチで構成してもよい。 In the first embodiment, two types of male screw spiral grooves, the first male screw spiral groove 23 in which the male screw portion 22 is a right-hand screw and the second male screw spiral groove 24 in which the male screw portion 22 is a left-hand screw, are overlapped on the same region. Although it has been described as having a right-handed thread or a left-handed thread, it may be formed with either one. In this case, a female thread corresponding to the male thread spiral groove formed in the male thread portion 22 is formed in the first female thread body 30 and the second female thread body 40 . Also, the two types of male-threaded helical grooves may be configured with pitches different from each other.

また、第一雌ねじ体30が環状凸部32を有し、第二雌ねじ体40が環状凹部42を有するものとして説明したが、これに限定されるものではなく、第一雌ねじ体30が環状凹部を有し、第二雌ねじ体40が環状凸部を有するように構成するようにしてもよい。 Further, the first female threaded body 30 has the annular convex portion 32, and the second female threaded body 40 has been described as having the annular recessed portion 42, but the present invention is not limited to this, and the first female threaded body 30 , and the second female screw body 40 may be configured to have an annular projection.

また、分離防止部54は、かしめによって押圧部52に接合されるが、これに限定されるものではなく、例えば分離防止部54と押圧部52とを溶接により固着してもよい。或いは図12(A)に示すように、押圧部52が受圧面56側に分離防止部54を嵌入させ得る雌ねじ螺旋溝が形成された凹部52aを有し、分離防止部54が凹部52aの雌ねじ螺旋溝に螺合する雄ねじ部が形成された凸部54aを有し、凹部52aに凸部54aを締付けるようにしてもよい。 Also, the separation preventing portion 54 is joined to the pressing portion 52 by caulking, but the present invention is not limited to this. For example, the separation preventing portion 54 and the pressing portion 52 may be fixed by welding. Alternatively, as shown in FIG. 12(A), the pressing portion 52 has a recess 52a formed with a female screw spiral groove into which the separation preventing portion 54 can be fitted on the pressure receiving surface 56 side, and the separation preventing portion 54 has a female thread of the recess 52a. It may have a convex portion 54a formed with a male screw portion that is screwed into the spiral groove, and the convex portion 54a may be tightened to the concave portion 52a.

なお、雌ねじ螺旋溝が形成された凹部52aと、雄ねじ部が形成された凸部54aとを締め付ける場合において、分離防止部54は、図12(B)に示す半割の部分体55a、55bによって構成してもよい。具体的には、部分体55a、55bは、互いの合わせ面55cを重ねることで分離防止部54を構成し得る形状であって、略対称な外形を有し、且つ組み合わせることで凸部54aの雄ねじ部を形成する。 In addition, when tightening the concave portion 52a formed with the female screw spiral groove and the convex portion 54a formed with the male screw portion, the separation prevention portion 54 is formed by the halved partial bodies 55a and 55b shown in FIG. 12(B). may be configured. Specifically, the partial bodies 55a and 55b have a shape that can form the separation preventing portion 54 by overlapping the mating surfaces 55c, and have substantially symmetrical outer shapes. Form a male thread.

このような部分体55a、55bは鍛造によってその外形を形成出来るため、分離防止部54の製作を安価で且つ容易に行うことができる。また分離防止部54は、凸部54aを凹部52aに螺合させることから、分離防止部55a、55b同士を接着や溶接等によって固着させる必要がないため、このことからも分離防止部54の製作が容易となる。 Since the external shapes of the partial bodies 55a and 55b can be formed by forging, the separation prevention portion 54 can be manufactured easily and inexpensively. In addition, since the separation preventing portion 54 has the convex portion 54a screwed into the concave portion 52a, there is no need to fix the separation preventing portions 55a and 55b to each other by adhesion, welding, or the like. becomes easier.

次に図13を参照して第二の実施形態に係る位置可調固定支持部材1について説明する。図13は外管14の管軸方向から視た位置可調固定支持部材1を示す断面図である。なお第一の実施形態と同様の箇所については、同一の符号を付して説明を省略する。第二の実施形態においては、第一雌ねじ体30の代わりに介在部材としての角ワッシャ96を設け、角ワッシャ96と第二雌ねじ体40を係合させて嵌合機構60を形成する。 Next, a position-adjustable fixed support member 1 according to a second embodiment will be described with reference to FIG. FIG. 13 is a cross-sectional view showing the position-adjustable fixed support member 1 viewed from the axial direction of the outer tube 14. As shown in FIG. Note that the same reference numerals are given to the same parts as in the first embodiment, and the description thereof is omitted. In the second embodiment, a square washer 96 is provided as an intervening member instead of the first female threaded body 30 , and the fitting mechanism 60 is formed by engaging the square washer 96 and the second female threaded body 40 .

また、伝達端部28は軸部20の他端部の端面に形成された六角穴とし、枢動機構50は凸曲面端部26と押圧部52とを固定する分離防止部90を有する。外管14の孔部16には、雄ねじ部22に螺合する右ねじの外管側雌ねじ螺旋条94が形成され、外管14と第二雌ねじ体40との間には、矩形状の角ワッシャ96が配置される。第二雌ねじ体40は、環状凹部42の代わりに突出部100(図15参照)を有する。分離防止部90は、リング状であって、凸曲面端部26の基端への接触を避けて押圧部52との間で凸曲面端部26を挟持するように、押圧部52に対してかしめによって接合される。勿論、分離防止部90と押圧部52の固定は、安定して固定され、外部からの入力があっても外れない程度に固定されていればよく、溶接や焼嵌め、圧入等の従来公知の手段で行ってもよい。 Further, the transmission end portion 28 is a hexagonal hole formed in the end face of the other end portion of the shaft portion 20 , and the pivoting mechanism 50 has a separation prevention portion 90 for fixing the convex end portion 26 and the pressing portion 52 . In the hole 16 of the outer tube 14, a right-handed outer tube side female thread helical thread 94 that is screwed into the male thread 22 is formed. A washer 96 is placed. The second female threaded body 40 has a protrusion 100 (see FIG. 15) instead of the annular recess 42 . Separation preventing portion 90 is ring-shaped, and is attached to pressing portion 52 so as to sandwich convex curved end portion 26 between itself and pressing portion 52 while avoiding contact with the proximal end of convex curved end portion 26 . Joined by caulking. Of course, the separation preventing portion 90 and the pressing portion 52 need only be stably fixed and fixed to such an extent that they do not come off even if there is an input from the outside. You can do it by means.

角ワッシャ96は、図14に示す軸部20を挿通させる孔96aと、係止端部96bと、複数の突起98とを有する。係止端部96bは、向かい合う一組の端部をそれぞれ外管14側に折曲げて形成される。これにより係止端部96bは、角ワッシャ96の外管14に対向する面よりも外管14側に突出し、角ワッシャ96を外管14に当接させたとき、角ワッシャ96の外管14に対する相対回転を防止する回転止めとして機能する。即ち係止端部96bは、第二雌ねじ体40と係合した角ワッシャ96が外管14に当接しているときに第二雌ねじ体40と共に回転するのを防止する。 The square washer 96 has a hole 96a through which the shaft portion 20 shown in FIG. The locking ends 96b are formed by bending a pair of opposing ends toward the outer tube 14 side. As a result, the locking end portion 96b protrudes toward the outer tube 14 side from the surface of the square washer 96 facing the outer tube 14, and when the square washer 96 is brought into contact with the outer tube 14, the square washer 96 does not move toward the outer tube 14. Acts as a rotation stop to prevent relative rotation with respect to That is, locking end 96b prevents square washer 96 engaged with second internal thread 40 from rotating with second internal thread 40 when outer tube 14 abuts.

突起98は、突出成形等により形成され、角ワッシャ96の第二雌ねじ体40に対向する面から第二雌ねじ体40側に突出する。ここでは十個の突起98が孔96aを囲むように所定の間隔を存して配置される。 The projection 98 is formed by projection molding or the like, and projects from the surface of the square washer 96 facing the second female thread body 40 toward the second female thread body 40 . Here, ten protrusions 98 are arranged at predetermined intervals so as to surround the hole 96a.

突出部100は、図15(B)に示すように、第二雌ねじ体40の角ワッシャ96に対向する雌ねじ側座面40aに複数形成される。また突出部100は、図15(A)に示すように、雌ねじ側座面40aの面方向に伸びる係止部100aと、第二雌ねじ体40の締付け方向に沿って係止部100aの先端側から雌ねじ側座面40aにかけて徐々に係止部100aから離間する方向に傾斜する傾斜部100bを有する。即ち突出部100は、基端側から先端側にかけて徐々に幅が狭くなる形状を有する。また突出部100は、上述の突起98間に嵌入可能な大きさに形成される。従って、ここでは十個の突出部100が第二雌ねじ体40のねじ孔の周りを囲むように所定の間隔を存して配置される。 As shown in FIG. 15(B), a plurality of protrusions 100 are formed on the female thread side seating surface 40a facing the square washer 96 of the second female thread body 40. As shown in FIG. Moreover, as shown in FIG. 15(A), the projecting portion 100 includes a locking portion 100a extending in the surface direction of the female thread side seating surface 40a and a distal end side of the locking portion 100a along the tightening direction of the second female thread body 40. to the female thread side seat surface 40a, and has an inclined portion 100b that gradually inclines in a direction away from the engaging portion 100a. That is, the projecting portion 100 has a shape in which the width gradually narrows from the base end side to the tip end side. Also, the protruding portion 100 is formed in a size that allows it to be inserted between the protrusions 98 described above. Therefore, here, ten protrusions 100 are arranged at predetermined intervals so as to surround the threaded hole of the second female screw body 40 .

角ワッシャ96と雌ねじ側座面40aとの間には嵌合機構60が形成される。即ち第二雌ねじ体40を締付け方向に回転させた場合、第二雌ねじ体40の突出部100の傾斜部100bが突起98に接触する。このとき突起98と突出部100の少なくとも一方が弾性変形することで第二雌ねじ体40の締付け方向の回転が許容される。突出部100が突起98間に嵌入すると、第二雌ねじ体40と角ワッシャ96とが係合して嵌合機構60を形成する。これにより第二雌ねじ体40が角ワッシャ96に対して緩み方向に回転しようとすると、各突出部100の係止部100aが突起98に当接する。その結果、第二雌ねじ体40の緩み方向の回転が規制される。 A fitting mechanism 60 is formed between the square washer 96 and the female thread side seating surface 40a. That is, when the second female threaded body 40 is rotated in the tightening direction, the inclined portion 100b of the projecting portion 100 of the second female threaded body 40 comes into contact with the projection 98 . At this time, at least one of the projection 98 and the projecting portion 100 is elastically deformed, so that the rotation of the second female screw body 40 in the tightening direction is permitted. When the protrusion 100 is fitted between the protrusions 98, the second female threaded body 40 and the square washer 96 are engaged to form the fitting mechanism 60. As shown in FIG. As a result, when the second female threaded body 40 tries to rotate in the loosening direction with respect to the square washer 96 , the engaging portion 100 a of each projecting portion 100 comes into contact with the projection 98 . As a result, rotation of the second female threaded body 40 in the loosening direction is restricted.

第二の実施形態に係る位置可調固定支持部材1の外管14への取付けについて説明する。まず軸部20が孔部16に挿通される。このとき軸部20は、伝達端部28を挿入端として、外管14の内側から孔部16に挿通され、雄ねじ部22を孔部16の外管側雌ねじ螺旋条94に螺合させる。次に角ワッシャ96を外管14の外側から軸部20に挿通させる。このとき角ワッシャ96は、係止端部96bを外管14の管軸方向に沿わせて外管14に当接させるように設置される。 Attachment of the position-adjustable fixed support member 1 according to the second embodiment to the outer tube 14 will be described. First, the shaft portion 20 is inserted through the hole portion 16 . At this time, the shaft portion 20 is inserted through the hole portion 16 from the inside of the outer tube 14 with the transmission end portion 28 as an insertion end, and the male thread portion 22 is screwed into the outer tube side female screw thread 94 of the hole portion 16 . Next, the square washer 96 is inserted through the shaft portion 20 from the outside of the outer tube 14 . At this time, the square washer 96 is installed so that the locking end portion 96b is brought into contact with the outer tube 14 along the axial direction of the outer tube 14 .

第二雌ねじ体40は、角ワッシャ96の外側から雄ねじ部22に螺合され、軸方向位置の調整のために角ワッシャ96から所定の間隔を存して配置される。以上により位置可調固定支持部材1の外管14への取付けが完了する。 The second female threaded body 40 is screwed onto the male threaded portion 22 from the outside of the square washer 96 and is arranged with a predetermined distance from the square washer 96 for adjustment of the axial position. Thus, the attachment of the position-adjustable fixed support member 1 to the outer tube 14 is completed.

位置可調固定支持部材1における軸部20の軸方向位置の調整及び固定について説明する。締結工具を伝達端部28に係合させ軸部20にトルクを作用させたとき、軸部20は孔部16に対して回転して移動する。これにより軸部20の軸方向位置が調整される。 The adjustment and fixation of the axial position of the shaft portion 20 in the position-adjustable fixed support member 1 will be described. When a fastening tool is engaged with transmission end 28 and torque is applied to shank 20 , shank 20 rotates and moves relative to bore 16 . Thereby, the axial position of the shaft portion 20 is adjusted.

第二雌ねじ体40と角ワッシャ96とが当接状態にあって第二雌ねじ体40の突出部100が角ワッシャ96の突起98間に嵌入したとき、軸部20の軸方向位置は固定される。具体的には、軸部20に内管12側に進行する方向のトルクが付加されたとき、それに連れて第二雌ねじ体40が軸部20と共に回転し角ワッシャ96側に移動する。しかし第二雌ねじ体40と角ワッシャ96とが当接している為、第二雌ねじ体40は、回転できず且つ移動が規制された状態となる。従って軸部20は、回転が規制され内管12側への移動が規制される。 When the second female threaded body 40 and the square washer 96 are in contact with each other and the projecting portion 100 of the second female threaded body 40 is fitted between the protrusions 98 of the square washer 96, the axial position of the shaft portion 20 is fixed. . Specifically, when a torque is applied to the shaft portion 20 in a direction toward the inner tube 12 side, the second female threaded body 40 rotates together with the shaft portion 20 and moves toward the square washer 96 side. However, since the second female threaded body 40 and the square washer 96 are in contact with each other, the second female threaded body 40 cannot rotate and its movement is restricted. Therefore, the shaft portion 20 is restricted from rotating and moving toward the inner tube 12 side.

また、軸部20に外管14の外側に進行する方向のトルクが付加されたとき、それに連れて第二雌ねじ体40は、軸部20と一体的に外管14の外側に移動する回転方向、即ち角ワッシャ96に対して緩み方向に回転しようとする。しかし第二雌ねじ体40は、突出部100の係止部100aが突起98に当接するため回転が規制されて固定される。従って軸部20は、回転が規制され外管14の外側への移動が規制される。これにより位置可調固定支持部材1の軸方向位置が固定される。更に各位置可調固定支持部材1の軸部20の位置を変えることによって上記第一の実施形態と同様に内管12に対する外管14の角度調節を行うことができる。 Further, when a torque is applied to the shaft portion 20 in a direction that advances to the outside of the outer tube 14, the second female threaded body 40 is moved to the outside of the outer tube 14 integrally with the shaft portion 20 in a rotational direction. That is, it tries to rotate with respect to the square washer 96 in the loosening direction. However, since the locking portion 100a of the projecting portion 100 abuts against the projection 98, the second female threaded body 40 is restricted from rotating and fixed. Therefore, the rotation of the shaft portion 20 is restricted, and the outward movement of the outer tube 14 is restricted. Thereby, the axial position of the position-adjustable fixed support member 1 is fixed. Further, by changing the position of the shaft portion 20 of each position-adjustable fixed support member 1, the angle of the outer tube 14 with respect to the inner tube 12 can be adjusted in the same manner as in the first embodiment.

なお、上記第二の実施形態において、角ワッシャ96に突起98、第二雌ねじ体40に突出部100を設けているが、これに限定されるものではなく、角ワッシャ96の外側端面に第一雌ねじ体30の環状凸部32と同様の環状凸部を形成し、第一の実施形態の第二雌ねじ体40の環状凹部42を角ワッシャ96の環状凸部に嵌合させて嵌合機構60を形成するようにしてもよい。 In the above-described second embodiment, the square washer 96 is provided with the projection 98 and the second female screw body 40 is provided with the projection 100 . An annular protrusion similar to the annular protrusion 32 of the female thread body 30 is formed, and the annular protrusion 42 of the second female thread body 40 of the first embodiment is fitted to the annular protrusion of the square washer 96 to form the fitting mechanism 60. may be formed.

また、第二の実施形態においては、第一雌ねじ体30の代わりに角ワッシャ96を設け、更に孔部16に外管側雌ねじ螺旋条94を形成した場合を例示したが、これに限定されるものではなく、矩形形状の孔部16に挿して嵌める挿嵌部材120を設け、挿嵌部材120の内周面に雄ねじ部22に螺合する部材側雌ねじ部螺旋条126を形成するようにしてもよい。図16は外管14の管軸方向から視た挿嵌部材120を有する位置可調固定支持部材1を示す断面図である。 In addition, in the second embodiment, the square washer 96 is provided in place of the first female thread body 30, and the outer tube side female thread helical thread 94 is formed in the hole 16. However, the present invention is limited to this. Instead, an inserting member 120 is provided to be inserted and fitted into the rectangular hole 16, and a member-side female screw portion helical thread 126 that is screwed to the male screw portion 22 is formed on the inner peripheral surface of the inserting member 120. good too. FIG. 16 is a cross-sectional view showing the position-adjustable fixed support member 1 having the insertion member 120 viewed from the axial direction of the outer tube 14 .

図17(A)は挿嵌部材120の他端部側の平面図、(B)は挿嵌部材120側面の断面図である。挿嵌部材120は、矩形形状の孔部16に嵌る中空の筒部122と、筒部122の一端部に形成され外管14の側壁の内周面に当接するフランジ124と、筒部122の他端面に形成された凹凸面128とを有している。筒部122は、外管14の厚みよりも長く、孔部16と略同じ形状と大きさの外形を有する。筒部122は、中空の内周面が軸部20の外周面と略同じ形状と大きさを有する。また筒部122の中空の内周面には、雄ねじ部22に螺合する右ねじの部材側雌ねじ螺旋条126が形成される。 17A is a plan view of the other end side of the fitting member 120, and FIG. 17B is a cross-sectional view of the side surface of the fitting member 120. FIG. The fitting member 120 includes a hollow cylindrical portion 122 that fits into the rectangular hole portion 16, a flange 124 that is formed at one end of the cylindrical portion 122 and contacts the inner peripheral surface of the side wall of the outer tube 14, and the cylindrical portion 122. and an uneven surface 128 formed on the other end surface. The cylindrical portion 122 is longer than the thickness of the outer tube 14 and has substantially the same shape and size as the hole portion 16 . The cylindrical portion 122 has a hollow inner peripheral surface that has substantially the same shape and size as the outer peripheral surface of the shaft portion 20 . A right-handed member-side female thread helical thread 126 that is screwed onto the male threaded portion 22 is formed on the hollow inner peripheral surface of the cylindrical portion 122 .

筒部122の外周及び孔部16の内周を矩形形状に形成することで、挿嵌部材120の回転を防止するように機能させている。しかし回転防止を目的とした場合、筒部122の外周及び孔部16の内周は、矩形形状に限定されるものではなく、多角形状や楕円形状等の非円形状であればよい。また筒部122の外周及び孔部16の内周を円形状とした場合には、フランジ124において、外管14の側壁の内周面に当接する当接面を、外管14の内周面の円弧に沿って湾曲した弧形状の湾曲面にすればよい。即ちフランジ124の弧形状の湾曲面を外管14の側壁の内周面に沿わせて密着させることにより、挿嵌部材120の回転防止機能を発揮させてもよい。勿論、筒部122の外周は、螺旋溝を形成して外管14に対して螺合するようにしてもよい。 By forming the outer circumference of the cylindrical portion 122 and the inner circumference of the hole portion 16 in a rectangular shape, the fitting member 120 functions to prevent rotation. However, for the purpose of preventing rotation, the outer circumference of the cylindrical portion 122 and the inner circumference of the hole portion 16 are not limited to rectangular shapes, and may be polygonal, elliptical, or other non-circular shapes. Further, when the outer periphery of the cylindrical portion 122 and the inner periphery of the hole portion 16 are circular, the contact surface of the flange 124 that contacts the inner peripheral surface of the side wall of the outer tube 14 is the inner peripheral surface of the outer tube 14. may be an arc-shaped curved surface curved along the arc of . That is, the arc-shaped curved surface of the flange 124 may be brought into close contact with the inner peripheral surface of the side wall of the outer tube 14 to prevent the insertion member 120 from rotating. Of course, the outer circumference of the tubular portion 122 may be formed with a spiral groove so that it can be screwed onto the outer tube 14 .

凹凸面128は、筒部122の他端部の端面に形成され、第二雌ねじ体40の突出部100に嵌合する凹部と、突出部100に当接する凸部とを交互に複数有している。凹凸面128は、挿嵌部材120が孔部16に挿通されたとき、外管14の側壁よりも外側に突出する。 The uneven surface 128 is formed on the end surface of the other end portion of the cylindrical portion 122, and has a plurality of alternately recessed portions that fit into the protruding portion 100 of the second female screw body 40 and protruding portions that contact the protruding portion 100. there is The uneven surface 128 protrudes outside the side wall of the outer tube 14 when the fitting member 120 is inserted through the hole 16 .

凹凸面128と雌ねじ側座面40aとの間には嵌合機構60が形成される。即ち第二雌ねじ体40を締付け方向に回転させた場合、第二雌ねじ体40の突出部100の傾斜部100bが凹凸面128の凸部に接触する。このとき凸部と突出部100の少なくとも一方が弾性変形することで第二雌ねじ体40の締付け方向の回転が許容される。突出部100が凹部に入り込むと、第二雌ねじ体40と挿嵌部材120とが係合して嵌合機構60が形成される。第二雌ねじ体40を緩み方向に回転させようとすると、各突出部100は、係止部100aが凸部に当接して移動が規制される。結果、第二雌ねじ体40の緩み方向の回転が規制され、位置可調固定支持部材1の軸方向位置を調整可能に固定することができる。 A fitting mechanism 60 is formed between the uneven surface 128 and the female thread side seating surface 40a. That is, when the second female threaded body 40 is rotated in the tightening direction, the inclined portion 100b of the projecting portion 100 of the second female threaded body 40 comes into contact with the convex portion of the uneven surface 128 . At this time, at least one of the convex portion and the projecting portion 100 is elastically deformed, thereby allowing the rotation of the second female screw body 40 in the tightening direction. When the projecting portion 100 enters the recess, the second female screw body 40 and the fitting member 120 are engaged to form the fitting mechanism 60 . When the second female threaded body 40 is to be rotated in the direction of loosening, the locking portion 100a of each projecting portion 100 abuts against the projecting portion and movement is restricted. As a result, the rotation of the second female screw body 40 in the loosening direction is restricted, and the axial position of the position-adjustable fixed support member 1 can be fixed so as to be adjustable.

なお、挿嵌部材120を有する位置可調固定支持部材1の外管14への取付けは、以下のようにして行う。まず挿嵌部材120は、外管14内部において凹凸面128側の端部を挿入端として孔部16に挿通され、フランジ124が外管14の内壁面に当接する位置に配置される。ここでは筒部122の外形と孔部16とが略同じ形状と大きさを有することから、挿嵌部材120は、孔部16内で回転が規制される。 The position-adjustable fixed support member 1 having the fitting member 120 is attached to the outer tube 14 as follows. First, the fitting member 120 is inserted through the hole 16 with the end on the uneven surface 128 side inside the outer tube 14 as an insertion end, and the flange 124 is arranged at a position where it contacts the inner wall surface of the outer tube 14 . Here, since the cylindrical portion 122 and the hole portion 16 have substantially the same shape and size, the insertion member 120 is restricted from rotating within the hole portion 16 .

次に軸部20を外管14内側から挿嵌部材120に挿通させる。即ち、凸曲面端部26を外管14内部に位置させ、雄ねじ部22を挿嵌部材120の部材側雌ねじ螺旋条126に螺合させる。第二雌ねじ体40は、外管14の外側から雄ねじ部22に螺合し、軸方向位置の調整のために挿嵌部材120の凹凸面128から間隔を存して配置される。以上により位置可調固定支持部材1の外管14への取付けが完了する。 Next, the shaft portion 20 is inserted through the fitting member 120 from the inside of the outer tube 14 . That is, the convex curved end portion 26 is positioned inside the outer tube 14 , and the male threaded portion 22 is screwed into the member-side female screw thread 126 of the fitting member 120 . The second female threaded body 40 is screwed onto the male threaded portion 22 from the outside of the outer tube 14 and is spaced apart from the uneven surface 128 of the insertion member 120 for adjustment of the axial position. Thus, the attachment of the position-adjustable fixed support member 1 to the outer tube 14 is completed.

なお、上記位置可調固定支持部材1は、嵌合機構60を、挿嵌部材120の凹凸面128と第二雌ねじ体40の雌ねじ側座面40aとの間に形成したが、これに限定されるものではなく、挿嵌部材120の他端部の外側端面に環状凸部32と同様の環状凸部を形成し、更に環状凹部42を有する第二雌ねじ体40を用いることで、挿嵌部材120と第二雌ねじ体40との間に上述の第一の実施形態の嵌合機構60と略同様の嵌合機構を形成してもよい。 In addition, in the position-adjustable fixed support member 1, the fitting mechanism 60 is formed between the concave-convex surface 128 of the fitting member 120 and the female thread side seat surface 40a of the second female thread body 40, but is limited to this. Instead, by using the second female screw body 40 having an annular convex portion 32 and an annular concave portion 42 formed on the outer end surface of the other end portion of the insertion member 120, the insertion member A fitting mechanism substantially similar to the fitting mechanism 60 of the above-described first embodiment may be formed between 120 and the second female screw body 40 .

上記各実施形態では、位置可調固定支持部材1を軸部20が外管14に対して直交する向きに設置しているが、これに限定されるものではなく、軸部20の軸方向を外管14の管軸に直交する方向から傾斜させて設置してもよい。例えば図18(A)に示すように軸部20を、凸曲面端部26が伝達端部28よりも下方に位置するように傾斜、即ち軸部20が内管12側に向かって下降するように傾斜させてもよい。勿論、傾斜向きや傾斜角度は±90°の範囲内であればよく、特に限定されるものではない。 In each of the above-described embodiments, the position-adjustable fixed support member 1 is installed so that the shaft portion 20 is perpendicular to the outer tube 14. However, the axial direction of the shaft portion 20 is not limited to this. It may be installed so as to be inclined from a direction orthogonal to the tube axis of the outer tube 14 . For example, as shown in FIG. 18A, the shaft portion 20 is tilted so that the convex curved end portion 26 is located below the transmission end portion 28, that is, the shaft portion 20 is lowered toward the inner tube 12 side. can be tilted to Of course, the tilt direction and tilt angle are not particularly limited as long as they are within the range of ±90°.

軸部20を傾斜させた場合、軸部20を外管14の軸方向に対する直交方向に設置したときにせん断力として作用していた力の一部を軸部20の軸方向に沿った力とすることができる。ここで図18(B)は、(A)に示すΔLを説明するための概略図であり、ΔLは、軸部20を傾斜させた場合の軸部20の仮想固定点の水平方向成分L´と、軸部20を水平に設置した場合の軸部20の仮想固定点の水平方向成分Lとの差分であって、外管14の位置が下方にずれる場合には、差分ΔLだけ軸部20を変位させるための力が必要となり、これが外管14の位置ずれに抵抗する力として作用する。従って、鉛直下向きの荷重が作用する外管14には、全周に亘って内管12からの反力が作用するので、外管14を内管12に対してより強固に固定することができる。 When the shaft portion 20 is tilted, part of the force acting as a shear force when the shaft portion 20 is installed in the direction perpendicular to the axial direction of the outer tube 14 is converted into a force along the axial direction of the shaft portion 20. can do. Here, FIG. 18B is a schematic diagram for explaining ΔL shown in FIG. and the horizontal component L of the virtual fixed point of the shaft portion 20 when the shaft portion 20 is installed horizontally. A force is required to displace the outer tube 14 and acts as a force to resist displacement of the outer tube 14 . Therefore, the reaction force from the inner tube 12 acts over the entire circumference of the outer tube 14 to which the vertically downward load acts, so that the outer tube 14 can be fixed to the inner tube 12 more firmly. .

なお、軸部20を凸曲面端部26が伝達端部28よりも下方に位置するように傾斜させたが、これに限定されるものではなく、逆向きの傾斜、即ち凸曲面端部26が伝達端部28よりも上方に位置するように傾斜させてもよい。また外管14の全周に亘って配設される位置可調固定支持部材1を、軸部20が凸曲面端部26を下向きに傾斜したものと、凸曲面端部26が上向きに傾斜したものとを互い違い配置してもよい。また位置可調固定支持部材1を、外管14の管軸に沿って、凸曲面端部26を下向きに傾斜させたものと、凸曲面端部26を上向きに傾斜させたものとを段違い配置、即ち上段列と下段列とで軸部20の傾斜を異ならせて配置してもよい。 Although the shaft portion 20 is inclined so that the convex curved surface end portion 26 is positioned lower than the transmission end portion 28, the present invention is not limited to this. It may be slanted so that it is positioned above the transmission end 28 . In addition, the position adjustable fixed support member 1 disposed over the entire circumference of the outer tube 14 is divided into a shaft portion 20 with a convex curved surface end portion 26 inclined downward and a convex curved surface end portion 26 inclined upward. may be staggered. In addition, the position-adjustable fixed support member 1 is staggered along the tube axis of the outer tube 14 such that the convex curved end portion 26 is inclined downward and the convex curved end portion 26 is inclined upward. That is, the inclination of the shaft portions 20 may be different between the upper row and the lower row.

次に図19を参照して第三の実施形態に係る位置可調固定支持部材1について説明する。なお第一の実施形態と同様の箇所については、同一の符号を付して説明を省略する。本実施形態ではナット形溶接部材130を第一雌ねじ体30と第二雌ねじ体40とに対して回転させ、摩擦攪拌接合(Friction Stir Welding)によって第一雌ねじ体30、第二雌ねじ体40、ナット形溶接部材130を一体化させて嵌合機構60を形成し、軸部20の軸方向位置の固定を行う。 Next, a position-adjustable fixed support member 1 according to a third embodiment will be described with reference to FIG. Note that the same reference numerals are given to the same parts as in the first embodiment, and the description thereof is omitted. In this embodiment, the nut-shaped welding member 130 is rotated with respect to the first female threaded body 30 and the second female threaded body 40, and the first female threaded body 30, the second female threaded body 40, and the nut by friction stir welding. A fitting mechanism 60 is formed by integrating the shape welding member 130 to fix the axial position of the shaft portion 20 .

本実施形態の第二雌ねじ体40は、略円錐台形状を有し、外周面の軸方向に対する傾斜角が、第二雌ねじ体40の環状凸部32の軸方向に対する傾斜角と略一致する。即ち第二雌ねじ体40の外周面は、他端側に向かって縮径するテーパ面となっている。また第二雌ねじ体40の外周面は、第二雌ねじ体40の一端が第一雌ねじ体30と当接したとき、環状凸部32の外周面に連続する面となる。 The second female threaded body 40 of the present embodiment has a substantially truncated cone shape, and the inclination angle of the outer peripheral surface with respect to the axial direction substantially matches the inclination angle of the annular projection 32 of the second female threaded body 40 with respect to the axial direction. That is, the outer peripheral surface of the second female threaded body 40 is a tapered surface that decreases in diameter toward the other end side. Moreover, the outer peripheral surface of the 2nd internal thread body 40 turns into a surface which follows the outer peripheral surface of the cyclic|annular convex part 32, when the end of the 2nd internal thread body 40 contacts the 1st internal thread body 30. As shown in FIG.

第二雌ねじ体40の外周面には、図20(B)に示す六角ナット形状を有するナット形溶接部材130が締嵌めにより嵌合され且つ点溶接により仮固定されている。なお、第二雌ねじ体40にナット形溶接部材130を仮固定する方法は、点溶接に限定されるものではなく、ろう接、アーク溶接等、点溶接以外の溶接、接着剤による接着等の方法でもよい。 A nut-shaped welding member 130 having a hexagonal nut shape shown in FIG. In addition, the method of temporarily fixing the nut-shaped welding member 130 to the second female threaded body 40 is not limited to spot welding, and welding other than spot welding such as brazing and arc welding, bonding with an adhesive, etc. It's okay.

ナット形溶接部材130は、摩擦撹拌接合によって第一雌ねじ体30及び第二雌ねじ体40と接合するのに適した材料、例えば、一般鋼材や機械構造用鋼等の炭素鋼や、クロムモリブデン鋼やニッケルクロムモリブデン鋼等の合金鋼等により構成される。 The nut-shaped welding member 130 is made of a material suitable for joining the first female threaded body 30 and the second female threaded body 40 by friction stir welding, for example, carbon steel such as general steel material and steel for machine structural use, chromium molybdenum steel, It is made of alloy steel such as nickel-chromium-molybdenum steel.

また、ナット形溶接部材130は、内周面が第二雌ねじ体40の外周面と略平行なテーパ面を成している。即ち内周面の軸方向に対する傾斜角が第二雌ねじ体40の外周面の軸方向の傾斜角と略一致する。ナット形溶接部材130の一端部(第一雌ねじ体40側の端部)は、第二雌ねじ体40の先端面よりも第一雌ねじ体30側に突出し、第一雌ねじ体30の環状凸部32を嵌合させて収容する収容空間132として機能する。収容空間132の軸方向の長さは、環状凸部32の軸方向の長さよりも長く形成されている。また収容空間132の開口側の内径は、環状凸部32の先端部の外径よりも大きく、かつ基端部の外径よりも小さく設定される。 In addition, the nut-shaped welding member 130 has a tapered surface whose inner peripheral surface is substantially parallel to the outer peripheral surface of the second female screw body 40 . That is, the inclination angle of the inner peripheral surface with respect to the axial direction substantially coincides with the axial inclination angle of the outer peripheral surface of the second female screw body 40 . One end of the nut-shaped welding member 130 (the end on the first female threaded body 40 side) protrudes toward the first female threaded body 30 from the tip surface of the second female threaded body 40, and the annular convex portion 32 of the first female threaded body 30 It functions as a housing space 132 that fits and houses the . The axial length of the housing space 132 is longer than the axial length of the annular protrusion 32 . In addition, the inner diameter of the housing space 132 on the opening side is set larger than the outer diameter of the distal end of the annular projection 32 and smaller than the outer diameter of the proximal end.

次に嵌合機構60について説明する。第一雌ねじ体30に軸部20を螺合させた後、図21(A)示すように第二雌ねじ体40を第一雌ねじ体30の外側から軸部20に挿通させ、雄ねじ部22に螺合させる。第二雌ねじ体40は、ナット形溶接部材130にトルクを付加したときナット形溶接部材130と共に回転する。ナット形溶接部材130は、外周面に自動油圧ポンプ等の駆動源が接続された六角ソケット(不図示)を装着し、六角ソケットを介してトルクが付加され回転する。ナット形溶接部材130及び第二雌ねじ体40は、図21の矢印Lで示す左ねじの締付け方向に回転し、矢印Xで示す第一雌ねじ体30側へ移動する。 Next, the fitting mechanism 60 will be described. After screwing the shaft portion 20 onto the first female threaded body 30, the second female threaded body 40 is inserted through the shaft portion 20 from the outside of the first female threaded body 30 as shown in FIG. match. The second female threaded body 40 rotates together with the nut-shaped welding member 130 when torque is applied to the nut-shaped welding member 130 . The nut-shaped welding member 130 has a hexagonal socket (not shown) to which a drive source such as an automatic hydraulic pump is connected to its outer peripheral surface, and torque is applied via the hexagonal socket to rotate. The nut-shaped welding member 130 and the second internal thread body 40 rotate in the tightening direction of the left screw indicated by the arrow L in FIG. 21 and move toward the first internal thread body 30 indicated by the arrow X.

第一雌ねじ体30の環状凸部32は、図21(B)に示すようにナット形溶接部材130の開口から収容空間132内に進入する。第二雌ねじ体40及びナット形溶接部材130は、更に矢印X方向に移動したとき、第二雌ねじ体40の一端が、図21(C)に示すように環状凸部32の先端に当接し、移動が規制される。 The annular projection 32 of the first female threaded body 30 enters into the accommodation space 132 from the opening of the nut-shaped welding member 130 as shown in FIG. 21(B). When the second female threaded body 40 and the nut-shaped welding member 130 are further moved in the direction of the arrow X, one end of the second female threaded body 40 comes into contact with the tip of the annular protrusion 32 as shown in FIG. movement is restricted.

そして、ナット形溶接部材130は、駆動源から六角ソケットを介して点溶接された部分(仮固定された部分)を破壊する所定以上のトルクが付加されて、点溶接された部分が破壊される。従って、第二雌ねじ体40は、所定のトルクで締結された状態となって回転が停止する。このとき六角ソケットは、ナット形溶接部材130を軸方向に押し込むようにし、ナット形溶接部材130に押圧力を付加する。これによりナット形溶接部材130は、第一雌ねじ体30及び第二雌ねじ体40に対して摺動する。またナット形溶接部材130を軸方向に押し込む押圧力を付加するので、ナット形溶接部材130、第一雌ねじ体30及び第二雌ねじ体40には、それぞれ面圧が付加される。 Then, the nut-shaped welding member 130 is applied with a predetermined torque or more to break the spot-welded portion (temporarily fixed portion) from the drive source via the hexagonal socket, and the spot-welded portion is broken. . Therefore, the second female threaded body 40 is fastened with a predetermined torque and stops rotating. At this time, the hexagonal socket presses the nut-shaped welding member 130 in the axial direction and applies a pressing force to the nut-shaped welding member 130 . Thereby, the nut-shaped welding member 130 slides with respect to the first internal thread body 30 and the second internal thread body 40 . Further, since a pressing force is applied to push the nut-shaped welding member 130 in the axial direction, surface pressure is applied to the nut-shaped welding member 130, the first female threaded body 30, and the second female threaded body 40, respectively.

この摺動による摩擦熱によって、ナット形溶接部材130と環状凸部32との境界面及びナット形溶接部材130と第二雌ねじ体40との境界面にそれぞれ可塑化、粘性化した層を形成する。可塑化、粘性化した層の材料は、溶接部材130の回転によって攪拌され、ナット形溶接部材130と環状凸部32とが接合され、またナット形溶接部材130と第二雌ねじ体40とが接合される。このようにナット形溶接部材130を介して第一雌ねじ体30と第二雌ねじ体40とを接合し嵌合機構60を形成する。 Frictional heat generated by this sliding forms a plasticized and viscous layer on the boundary surface between the nut-shaped welding member 130 and the annular projection 32 and the boundary surface between the nut-shaped welding member 130 and the second female screw body 40, respectively. . The material of the plasticized and viscous layer is stirred by the rotation of the welding member 130, and the nut-shaped welding member 130 and the annular protrusion 32 are joined, and the nut-shaped welding member 130 and the second female thread body 40 are joined. be done. Thus, the fitting mechanism 60 is formed by joining the first female threaded body 30 and the second female threaded body 40 via the nut-shaped welding member 130 .

本実施形態においては、ナット形溶接部材130を介して第一雌ねじ体30と第二雌ねじ体40とが接合するため、第一雌ねじ体30及び第二雌ねじ体40は、互いに相対回転できない状態となる。従って位置可調固定支持部材1の軸方向位置を固定することができる。更に各位置可調固定支持部材1の軸部20の位置を変えることによって上記第一の実施形態と同様に内管12に対する外管14の角度調節を行うことができる。 In the present embodiment, since the first female threaded body 30 and the second female threaded body 40 are joined via the nut-shaped welding member 130, the first female threaded body 30 and the second female threaded body 40 cannot rotate relative to each other. Become. Therefore, the axial position of the adjustable fixed support member 1 can be fixed. Further, by changing the position of the shaft portion 20 of each position-adjustable fixed support member 1, the angle of the outer tube 14 with respect to the inner tube 12 can be adjusted in the same manner as in the first embodiment.

なお、第三の実施形態において、第一雌ねじ体30の環状凸部32の外周面、第二雌ねじ体40の外周面及びナット形溶接部材130の内周面の傾斜角は、特定の角度に限定されるものではない。例えば第一雌ねじ体30の環状凸部32の外周面、第二雌ねじ体40の外周面及びナット形溶接部材130の内周面の軸方向に対する傾斜角αを、図22(a)に示すように30°、図22(b)に示すように45°、図22(c)に示すように60°等のように設定してもよい。図22(a)~(c)を比較して明らかなように、傾斜角αを大きくすることにより、ナット形溶接部材13の進行方向に対するナット形溶接部材130の内周面と、環状凸部32及び第二雌ねじ体40の外周面の傾斜が軸方向に対して直交方向に近づくので、ナット径溶接部130に軸方向の一定の押圧力を付加した場合に、ナット形溶接部材130から環状凸部32及び第二雌ねじ体40に付加される面圧を高めることができる。 In addition, in the third embodiment, the inclination angles of the outer peripheral surface of the annular convex portion 32 of the first female threaded body 30, the outer peripheral surface of the second female threaded body 40, and the inner peripheral surface of the nut-shaped welding member 130 are set to a specific angle. It is not limited. For example, the inclination angle α with respect to the axial direction of the outer peripheral surface of the annular projection 32 of the first female threaded body 30, the outer peripheral surface of the second female threaded body 40, and the inner peripheral surface of the nut-shaped welding member 130 is as shown in FIG. 30°, 45° as shown in FIG. 22(b), 60° as shown in FIG. 22(c), and the like. 22(a) to 22(c), by increasing the inclination angle α, the inner peripheral surface of the nut-shaped welding member 130 with respect to the traveling direction of the nut-shaped welding member 13 and the annular convex portion 32 and the inclination of the outer peripheral surfaces of the second female threaded body 40 approach the direction orthogonal to the axial direction, so that when a constant axial pressing force is applied to the nut diameter welded portion 130, the annular The surface pressure applied to the convex portion 32 and the second female screw body 40 can be increased.

また、環状凸部32と第二雌ねじ体40の傾斜角を異ならせ、またナット形溶接部材130の内周面を、軸方向に沿って途中で傾斜角が変化する複合角度円錐台の形状としてもよい。例えば図23に示すように、環状凸部32の外周面が軸方向から30°傾斜し、第二雌ねじ体40の外周面が軸方向から45°傾斜していた場合、ナット形溶接部材130の内周面の軸方向に対する傾斜角は、第二雌ねじ体40の外周面に嵌合している内周面においては45°とする。また収納空間132が形成されている一端部の内周面においては、第二雌ねじ体40近傍が45°で、当該近傍から一端部の先端までの中途から30°に切り替わるように形成する。 In addition, the inclination angles of the annular protrusion 32 and the second female screw body 40 are made different, and the inner peripheral surface of the nut-shaped welding member 130 is formed into a compound angle truncated cone shape in which the inclination angle changes along the axial direction. good too. For example, as shown in FIG. 23, when the outer peripheral surface of the annular convex portion 32 is inclined by 30° from the axial direction and the outer peripheral surface of the second female screw body 40 is inclined by 45° from the axial direction, the nut-shaped welding member 130 The inclination angle of the inner peripheral surface with respect to the axial direction is 45° in the inner peripheral surface fitted to the outer peripheral surface of the second female threaded body 40 . In addition, on the inner peripheral surface of the one end where the storage space 132 is formed, the vicinity of the second female screw body 40 is 45°, and it is formed to switch to 30° from the vicinity to the tip of the one end.

次に、図24を参照して第四の実施形態の位置可調固定支持部材1について説明する。なお第一の実施形態と同様の箇所については、同一の符号を付して説明を省略する。本実施形態では第一雌ねじ体140が枢動機構50を収容するためのハウジング部150を有するものである。なお第一雌ねじ体140は、第一雌ねじ体30と同様に軸方向に貫通するねじ孔と、環状凸部32を有する。また外管14の孔部16は、枢動機構50が通過可能な大きさに形成される。 Next, the position-adjustable fixed support member 1 of the fourth embodiment will be described with reference to FIG. 24 . Note that the same reference numerals are given to the same parts as in the first embodiment, and the description thereof is omitted. In this embodiment, the first female threaded body 140 has a housing portion 150 for accommodating the pivoting mechanism 50 . In addition, the first female threaded body 140 has a threaded hole penetrating in the axial direction and an annular convex portion 32 similarly to the first female threaded body 30 . Also, the hole 16 of the outer tube 14 is formed to have a size through which the pivoting mechanism 50 can pass.

ここでは第一雌ねじ体140をハウジング部150と一体に構成しているが、第一雌ねじ体140とハウジング部150とは別体に構成されていてもよい。ハウジング部150は、一端部が開口し、他端部に軸部20の雄ねじ部22と螺合するねじ孔が貫通する底部152が形成された有底の円筒形状を有し、内周面によって囲まれる空間内に枢動機構50を収容可能に構成される。またハウジング部150の一端部の外周には、ハウジング部150を介して第一雌ねじ体140を外管14に固定するための、外側にフランジ状に突出する固定端部154が形成され、底部152の外側端面には第一雌ねじ体140の環状凸部32が形成される。 Although the first female threaded body 140 is configured integrally with the housing portion 150 here, the first female threaded body 140 and the housing portion 150 may be configured separately. The housing portion 150 has a bottomed cylindrical shape with one end open and the other end having a bottom portion 152 through which a threaded hole to be screwed with the male thread portion 22 of the shaft portion 20 is formed. It is configured to accommodate the pivot mechanism 50 within the enclosed space. A fixed end portion 154 is formed on the outer periphery of one end portion of the housing portion 150 and protrudes outward in a flange shape for fixing the first female threaded body 140 to the outer tube 14 via the housing portion 150 . An annular convex portion 32 of the first female screw body 140 is formed on the outer end surface of the .

本実施形態の位置可調固定支持部材1の組み立て、及び外管14への取付けは以下の手順により行う。先ず枢動機構50が構成された軸部20を第一雌ねじ体140のねじ孔に螺合させて挿通させる。このとき軸部20は、伝達端部28を挿入端としてハウジング部150の開口から第一雌ねじ体140のねじ孔に挿通され、枢動機構50がハウジング部150に収容されるように軸方向位置が決定される。第二雌ねじ体40は、第一雌ねじ体140の外側から雄ねじ部22に螺合し、第一雌ねじ体140から所定の間隔を存して配置される。以上により位置可調固定支持部材1が構成される。 The assembly of the position-adjustable fixed support member 1 of this embodiment and the attachment to the outer tube 14 are performed according to the following procedures. First, the shaft portion 20 having the pivoting mechanism 50 is screwed into the threaded hole of the first female screw body 140 to be inserted therethrough. At this time, the shaft portion 20 is inserted through the opening of the housing portion 150 into the threaded hole of the first female screw body 140 with the transmission end portion 28 as an insertion end, and the pivoting mechanism 50 is positioned axially so that it is accommodated in the housing portion 150 . is determined. The second female threaded body 40 is screwed into the male threaded portion 22 from the outside of the first female threaded body 140 and is arranged at a predetermined distance from the first female threaded body 140 . The position-adjustable fixed support member 1 is configured as described above.

位置可調固定支持部材1は、ハウジング部150の開口と外管14の孔部16とが連通するように設置位置が決められて固定される。具体的には、まずハウジング部150の開口と孔部16とが連通するようにハウジング部150を外管14の外周面に当接させ、お互いを固定する。固定端部154と外管14との固定方法は、特に限定されるものではないが、ここではボルトを締結することによって固定する。他の固定方法として溶接や接着による固定を行ってもよい。 The position-adjustable fixed support member 1 is positioned and fixed such that the opening of the housing portion 150 and the hole portion 16 of the outer tube 14 communicate with each other. Specifically, first, the housing portion 150 is brought into contact with the outer peripheral surface of the outer tube 14 so that the opening of the housing portion 150 and the hole portion 16 communicate with each other, and are fixed to each other. Although the method of fixing the fixed end portion 154 and the outer tube 14 is not particularly limited, they are fixed by tightening bolts here. As another fixing method, fixing by welding or adhesion may be performed.

本実施形態では、第一雌ねじ体140のハウジング部150内に枢動機構50を収容し、外管14内から枢動機構50を退避させることが可能となる。従って、内管12の上部に外管14を配置する際に、枢動機構50と内管12との接触を避けることができる。また位置可調固定支持部材1は外管14の側壁に周方向に等間隔で配置されるため、枢動機構50が外管14の内側に存していた場合は、各枢動機構50が内管12に接触しないように外管14を内管12の上部に設置することが困難となるが、本実施形態のように枢動機構50をハウジング部150に収容し外管14の外側に位置させるので、内管12に対する外管14の設置が容易となる。また予め位置可調固定支持部材1を構成しておき、外管14の外側にハウジング部150を固定するだけで位置可調固定支持部材1を外管14に取付けできるため、外管14への位置可調固定支持部材1の取付けが第一乃至第三の実施形態の場合と比較して容易となる。 In this embodiment, the pivoting mechanism 50 can be accommodated in the housing portion 150 of the first female threaded body 140 and the pivoting mechanism 50 can be retracted from the outer tube 14 . Therefore, contact between the pivoting mechanism 50 and the inner tube 12 can be avoided when the outer tube 14 is placed on top of the inner tube 12 . In addition, since the position-adjustable fixed support members 1 are arranged on the side wall of the outer tube 14 at regular intervals in the circumferential direction, if the pivoting mechanisms 50 exist inside the outer tube 14, each pivoting mechanism 50 can be Although it is difficult to install the outer tube 14 above the inner tube 12 so as not to contact the inner tube 12, the pivoting mechanism 50 is housed in the housing portion 150 as in the present embodiment and placed outside the outer tube 14. The positioning facilitates installation of the outer tube 14 with respect to the inner tube 12 . Further, since the position-adjustable fixed support member 1 can be attached to the outer pipe 14 simply by configuring the position-adjustable fixed support member 1 in advance and fixing the housing portion 150 to the outside of the outer pipe 14, the position-adjustable fixed support member 1 can be attached to the outer pipe 14. Installation of the position-adjustable fixed support member 1 becomes easier than in the first to third embodiments.

なお、ハウジング部150は、枢動機構50によって大きさが決定されるので、図24に示す枢動機構50が軸部20の径よりも大きい場合には、ハウジング部150は第一雌ねじ体140の環状凸部32の基端側の外周面よりも外側に拡がる形状となる。そこで図25に示すように枢動機構50を軸部20の径よりも小さくなるように形成すれば、ハウジング部150の外周面と環状凸部32の基端側の外周面とを略同じ径に形成することができるので、第一雌ねじ体140の設置に必要な面積を小さくすることができる。 In addition, since the size of the housing portion 150 is determined by the pivoting mechanism 50, when the pivoting mechanism 50 shown in FIG. The shape of the annular protrusion 32 expands outward from the outer peripheral surface of the base end side of the annular protrusion 32 . Therefore, as shown in FIG. 25, if the pivoting mechanism 50 is formed so as to be smaller in diameter than the shaft portion 20, the outer peripheral surface of the housing portion 150 and the outer peripheral surface of the annular convex portion 32 on the base end side will have substantially the same diameter. , the area required for installing the first female threaded body 140 can be reduced.

なお、第一雌ねじ体140とハウジング部150とが一体に構成されているものとして説明したが、第一雌ねじ体140とハウジング部150とを別体で構成した場合、第一雌ねじ体140は、図26に示すようにハウジング部150の底部152に当接するフランジ状の係合部142と、ハウジング部150に形成された孔から外部に突出する環状凸部32とを有する構成とすることが出来る。このとき環状凸部32の外周面と底部152の孔との間に、互いの相対回転を規制する相対回転防止機構を設けることで締結時の共回りを防止することが出来る。勿論、別体に設ける第一雌ねじ体140とハウジング部150との嵌合は、ねじ締結や溶接としてもよいことは言うまでもない。 In addition, although the first female threaded body 140 and the housing portion 150 are described as being configured integrally, when the first female threaded body 140 and the housing portion 150 are configured separately, the first female threaded body 140 is As shown in FIG. 26, it can be configured to have a flange-like engaging portion 142 that abuts on the bottom portion 152 of the housing portion 150 and an annular convex portion 32 that protrudes outward from a hole formed in the housing portion 150 . . At this time, by providing a relative rotation prevention mechanism for restricting relative rotation between the outer peripheral surface of the annular projection 32 and the hole of the bottom portion 152, it is possible to prevent co-rotation during fastening. Needless to say, the fitting between the separately provided first female threaded body 140 and the housing portion 150 may be screwed or welded.

例えば、環状凸部32の外周面に一部を欠落して軸部20の回転軸を挟んで互いに平行な二つの面からなる二面幅を形成し、またハウジング部150の孔の内周面を環状凸部32の外周面に対応させた形状とすることで第一雌ねじ体140とハウジング部150との相対回転を規制する。このように第一雌ねじ体140とハウジング部150とを別体で構成した場合、枢動機構50が内管12を押圧したときに、第一雌ねじ体140にはハウジング部150側を押し付ける反力が作用する。 For example, the outer peripheral surface of the annular convex portion 32 is partially missing to form a width across flats consisting of two surfaces parallel to each other with the rotation axis of the shaft portion 20 interposed therebetween, and the inner peripheral surface of the hole of the housing portion 150. The shape corresponding to the outer peripheral surface of the annular projection 32 restricts the relative rotation between the first female threaded body 140 and the housing portion 150 . In this way, when the first female threaded body 140 and the housing part 150 are configured separately, when the pivot mechanism 50 presses the inner tube 12, the reaction force that presses the housing part 150 side to the first female threaded body 140 works.

また、ハウジング部150が外管14に固定されているため、軸部20を締め付ける程、枢動機構50が内管12を押圧する図26の矢印aで示す方向の押圧力と共に第一雌ねじ体140にハウジング部150を押し付ける矢印bで示す方向の反力が強くなり、位置可調固定支持部材1が内管12を押し付ける力が強固となって安定して内管12に外管14を固定した状態を維持することができる。なお、第一雌ねじ体140とハウジング部150との相対回転を抑止するための構造は上記に限定されず、例えば係合部142を底部152に嵌合させる構造を採用してもよい。具体例としては、係合部142を断面矩形状に形成し、底部152に係合部142の断面形状と同様の矩形状の凹みを設け、係合部142を底部152の凹みに嵌合させることで、第一雌ねじ体140とハウジング部150との相対回転を抑止する構造を採用してもよい。 In addition, since the housing portion 150 is fixed to the outer tube 14, the more the shaft portion 20 is tightened, the more the pivoting mechanism 50 presses the inner tube 12 with the pressing force in the direction indicated by the arrow a in FIG. The reaction force in the direction indicated by the arrow b that presses the housing portion 150 against 140 becomes strong, and the force of the position-adjustable fixed support member 1 pressing against the inner tube 12 becomes stronger, stably fixing the outer tube 14 to the inner tube 12 . can be maintained. In addition, the structure for suppressing the relative rotation between the first female threaded body 140 and the housing portion 150 is not limited to the above, and for example, a structure in which the engaging portion 142 is fitted to the bottom portion 152 may be adopted. As a specific example, the engaging portion 142 is formed to have a rectangular cross-section, a rectangular depression similar to the cross-sectional shape of the engaging portion 142 is provided in the bottom portion 152, and the engaging portion 142 is fitted into the depression of the bottom portion 152. Thus, a structure that suppresses relative rotation between the first female threaded body 140 and the housing portion 150 may be employed.

なお、第一雌ねじ体140とハウジング部150とを別体に構成した場合、第一雌ねじ体140とハウジング部150との分離を防止する分離防止部を設けてもよい。例えば、図27(A)に示すようにハウジング部150の外側で第一雌ねじ体140の外周面に分離防止部としてのCリング等の止め輪144aを装着させてもよい。また分離防止部としてナットを用いるようにしてもよく、その場合には第一雌ねじ体140の外周面に雄ねじ溝146を形成し、図27(B)に示すようにハウジング部150の外側で第一雌ねじ体140の外周面に分離防止部としてのナット144bを螺合させる。なお、分離防止部は、上記に限定されるものではなく、ワッシャ等であってもよい。分離防止部を設けておけば、第一雌ねじ体140に軸部20を挿通させる前に、第一雌ねじ体140とハウジング部150とを容易に組み合わせた状態にしておくことができる。 In addition, when the 1st internal thread body 140 and the housing part 150 are comprised separately, you may provide the separation prevention part which prevents the separation with the 1st internal thread body 140 and the housing part 150. FIG. For example, as shown in FIG. 27A, a snap ring 144a such as a C-ring may be attached to the outer peripheral surface of the first female screw body 140 outside the housing portion 150 as a separation preventing portion. Alternatively, a nut may be used as the separation preventing portion. In that case, a male thread groove 146 is formed on the outer peripheral surface of the first female thread body 140, and as shown in FIG. A nut 144b as a separation preventing portion is screwed onto the outer peripheral surface of the female threaded body 140 . Note that the separation preventing portion is not limited to the above, and may be a washer or the like. By providing the separation preventing portion, the first female threaded body 140 and the housing portion 150 can be easily combined before the shaft portion 20 is inserted through the first female threaded body 140 .

また、各実施形態において、当接部58は、内管12に当接する当接部位が弾性部材であるものとしたが、これに限定されるものではなく、当接部58と内管12の側壁とを噛み合わせるようにして当接させてもよい。例えば当接部58の表面と内管12の側壁の壁面とに、当接時に互いに嵌り合う水平方向に延びる凹凸を形成する。この場合の凹凸は、断面二等辺三角形状の山形であっても、峰と谷を湾曲させた波型であってもよい。また微細凹凸を、水平方向かつ鉛直方向の双方に複数形成した、所謂エンボス形状を採用することも好ましい。 Further, in each embodiment, the contact portion of the contact portion 58 that contacts the inner tube 12 is an elastic member. You may contact|abut as it mesh|engages with a side wall. For example, the surface of the abutment portion 58 and the wall surface of the side wall of the inner tube 12 are formed with horizontally extending unevenness that fit together when abutted. The unevenness in this case may be a mountain shape having an isosceles triangular cross section, or a corrugated shape with curved peaks and valleys. It is also preferable to employ a so-called embossed shape in which a plurality of fine unevennesses are formed in both horizontal and vertical directions.

なお、上述した説明において、ハウジング部150を外管の外周面に固定した場合を例に説明したが、これに限定するものではない。例えば図28に示すように、ハウジング部200を外管14の孔部16に挿通させた状態で固定してもよい。この場合、位置可調固定支持部材1をハウジング部200、ハウジング部200の外周面に配設されるナット210、ハウジング部200内に配設され軸部20に螺合する第一雌ねじ体220、軸部20及び第二雌ねじ体40等によって構成する。 In the above description, the case where the housing part 150 is fixed to the outer peripheral surface of the outer tube has been described as an example, but the present invention is not limited to this. For example, as shown in FIG. 28, the housing portion 200 may be fixed while being inserted into the hole portion 16 of the outer tube 14 . In this case, the position-adjustable fixed support member 1 is disposed in a housing portion 200, a nut 210 disposed on the outer peripheral surface of the housing portion 200, a first female thread body 220 disposed in the housing portion 200 and screwed to the shaft portion 20, It is configured by the shaft portion 20, the second female screw body 40, and the like.

ハウジング部200は、有底の筒状を成し、一端部にフランジ部202を具える。またハウジング部200の底部には、第一雌ねじ体220を介して軸部20を挿通させる孔204が形成される。またハウジング部200の外周面には、雄ねじ部が形成される。 The housing part 200 has a bottomed cylindrical shape and has a flange part 202 at one end. A hole 204 is formed in the bottom of the housing part 200 through which the shaft part 20 is inserted through the first female screw body 220 . A male screw portion is formed on the outer peripheral surface of the housing portion 200 .

ナット210は、ハウジング部200の外周面の雄ねじ部に螺合する雌ねじ螺旋条を有し、ハウジング部200に螺合して外管14を押圧する位置に配置される。ここでは、ナット210と外管14との間にワッシャ215を配設するが、勿論ワッシャ215を除く構成であってもよい。 The nut 210 has a female threaded helical thread that is screwed onto the externally threaded portion of the outer peripheral surface of the housing portion 200 , and is arranged at a position where it is screwed onto the housing portion 200 to press the outer tube 14 . Although the washer 215 is arranged between the nut 210 and the outer tube 14 here, the configuration without the washer 215 is of course possible.

第一雌ねじ体220は、外形形状がハウジング部200の内周面に略沿った形状である。また第一雌ねじ体220は、第一雌ねじ体30と同様に軸方向に貫通するねじ孔と、軸方向の端部に環状凸部32を有する。第一雌ねじ体220は、環状凸部32を孔204に挿通させてハウジング部200内に配設される。これにより環状凸部32は、外管14の外側に突出する。 The first female threaded body 220 has an outer shape that substantially follows the inner peripheral surface of the housing portion 200 . Further, the first female threaded body 220 has a threaded hole penetrating in the axial direction similarly to the first female threaded body 30 and an annular convex portion 32 at the end portion in the axial direction. The first female screw body 220 is arranged in the housing part 200 by inserting the annular projection 32 into the hole 204 . As a result, the annular protrusion 32 protrudes outside the outer tube 14 .

このようなハウジング部200は、フランジ部202を外管14の内周面に当接させ、底部側が外管4の外側に突出するように外管4の孔部16に挿通される。次にワッシャ215を外管14の外側でハウジング部200に配設し、ナット210をハウジング部200の外周面に螺合させ、ワッシャ215を介して外管14を押圧する位置まで締付け方向に沿って移動させる。結果、ハウジング部200は、フランジ部202と、ナット210とで外管14を挟むように取り付けられ、外管14に固定される。 Such a housing portion 200 is inserted into the hole portion 16 of the outer tube 4 so that the flange portion 202 is brought into contact with the inner peripheral surface of the outer tube 14 and the bottom side protrudes outside the outer tube 4 . Next, the washer 215 is disposed on the housing portion 200 outside the outer tube 14, the nut 210 is screwed onto the outer peripheral surface of the housing portion 200, and the outer tube 14 is pressed through the washer 215 along the tightening direction. to move. As a result, the housing portion 200 is attached so as to sandwich the outer tube 14 between the flange portion 202 and the nut 210 and is fixed to the outer tube 14 .

また、各実施形態の軸部20は、図2等に示すように凸曲面端部26の近傍においてくびれを有するように、その直径が凸曲面端部26の基端部付近で縮小する形状であるが、図29(a)に示す軸部20がくびれを有しない形状であってもよい。また凸曲面端部26の球形形状の直径は、図29(b)に示すように軸部20の直径と略同等であってもよく、図29(c)に示すように軸部20の直径よりも小さいものであってもよい。また凸曲面端部26は、枢動機構50を枢動可能とすることを目的とした形状を要するため、一部に球面を有する形状、例えば図29(d)に示す先端部が凸状の半球形状や、図29(e)に示す球体の上下端部を切断し先端部のみが球面となっている形状、図29(f)に示す球体の先端を切断し先端面が平面で上下端部が球面となっている形状等であってもよい。また枢動機構50は、少なくとも上下方向に枢動可能であることを要するため、凸曲面端部26の先端面は、略球形状の曲面に限定されるものではなく、円柱面形状であってもよい。 Further, the shaft portion 20 of each embodiment has a shape in which the diameter is reduced near the base end portion of the convex curved surface end portion 26 so as to have a constriction near the convex curved surface end portion 26 as shown in FIG. However, the shaft portion 20 shown in FIG. 29(a) may have a shape that does not have a constriction. The diameter of the spherical shape of the convex curved end portion 26 may be substantially the same as the diameter of the shaft portion 20 as shown in FIG. may be smaller than Further, since the convex curved surface end portion 26 requires a shape for the purpose of enabling the pivoting mechanism 50 to pivot, a shape having a spherical surface in part, for example, a convex tip portion shown in FIG. A hemispherical shape, a shape in which only the top and bottom ends of a sphere shown in FIG. A shape or the like in which the portion is a spherical surface may be used. Further, since the pivoting mechanism 50 is required to be capable of pivoting at least in the vertical direction, the tip surface of the convex curved surface end portion 26 is not limited to a substantially spherical curved surface, but may be a cylindrical surface shape. good too.

また、各実施形態において、当接部58を内管12側に付勢するための付勢部を軸部20に形成してもよい。軸部20に形成される付勢部160(図30参照)は、例えば凸曲面端部26の先端から軸部20の中心軸に沿って穿孔し、底部が凸曲面端部26と雄ねじ部22との間に位置する深さの穴をあけ、穴をあけた範囲内において軸部20の外周面を切り欠くことにより形成される。付勢部160を形成する際の外周面の切欠きは、例えば図30(a)に示す螺旋状の切欠きであってもよく、図30(b)に示す軸方向に直交する方向に所定深さの切欠きを設け、この切欠きを180度位相をずらしながら、かつ軸方向に所定間隔空けて交互に設けるようにしてもよい。切欠きの深さは少なくとも軸部20に穿けた穴に到達する深さであればよい。また、軸部20と凸曲面端部26とを別体に構成し、図30(c)に示す軸部20に穿けた穴に凸曲面端部26を挿設して補強したり、安定性を高めたりしてもよい。 Further, in each embodiment, a biasing portion for biasing the contact portion 58 toward the inner pipe 12 may be formed in the shaft portion 20 . A biasing portion 160 (see FIG. 30) formed on the shaft portion 20 is formed by, for example, drilling along the central axis of the shaft portion 20 from the tip of the convex curved end portion 26, and has a bottom formed by the convex curved end portion 26 and the male screw portion 22. , and the outer peripheral surface of the shaft portion 20 is notched within the range of the hole. The notch in the outer peripheral surface when forming the urging portion 160 may be, for example, a spiral notch shown in FIG. Notches of different depths may be provided, and the notches may be alternately provided with a 180 degree phase shift and at predetermined intervals in the axial direction. The depth of the notch should be such that it reaches at least the hole drilled in the shaft portion 20 . In addition, the shaft portion 20 and the convex curved end portion 26 are configured separately, and the convex curved end portion 26 is inserted into a hole drilled in the shaft portion 20 shown in FIG. can be increased.

また、各実施形態において、内管12の上部に当接キャップを設置し、当接キャップと外管14との間で外管14の内側に嵌まる被支持部材を配設してもよい。具体的に図31(a)に示すように当接キャップ230は、上面が凸曲面状に形成された上曲面部230aを具える。被支持部材240は、凹状の被支持面240aと外管14の天面に当接する当接面240bとを具え、被支持面240aが上曲面部230a上で支持される。凹状の被支持面240aは、上曲面部230aと当接する面が仮想球面の一部を成すように構成されることが荷重分散上、好ましい。これにより、図31(b)に示すように外管14を内管12に対して傾斜させた場合であっても、上曲面部230aの曲面に沿って被支持面240aの位置が変わり、当接キャップ230による被支持部材240の支持状態が維持される。結果、外管14が内管12に対して傾斜しても、外管14が内管12上に載置されているので、位置可調固定支持部材1に掛かる負荷を低減させることができる。 Further, in each embodiment, a contact cap may be installed on the upper portion of the inner tube 12 and a supported member fitted inside the outer tube 14 may be arranged between the contact cap and the outer tube 14 . Specifically, as shown in FIG. 31(a), the contact cap 230 has an upper curved surface portion 230a having a convexly curved upper surface. The supported member 240 has a concave supported surface 240a and a contact surface 240b that contacts the top surface of the outer tube 14, and the supported surface 240a is supported on the upper curved surface portion 230a. In terms of load distribution, it is preferable that the concave supported surface 240a is configured such that the surface in contact with the upper curved surface portion 230a forms a part of the phantom spherical surface. As a result, even when the outer tube 14 is inclined with respect to the inner tube 12 as shown in FIG. The support state of the supported member 240 by the contact cap 230 is maintained. As a result, even if the outer tube 14 is inclined with respect to the inner tube 12 , the load applied to the position-adjustable fixed support member 1 can be reduced because the outer tube 14 is placed on the inner tube 12 .

また、被支持面240aは、凹状に限定するものではなく、図31(c)に示すように、凹曲面状であってもよく、このようにすれば上曲面部230aとの接触面積を増えて、位置可調固定支持部材1に掛かる負荷を更に低減させることができる。
また、外管14は、図31(d)に示すように中途部に仕切り板250を有する形状であって、仕切り板250の上方及び下方のそれぞれに内管12を配設し得るようにしてもよい。その場合は仕切り板250の上方においても、当接キャップ230と被支持部材240を配設してもよく、ここでは当接キャップ230を内管12の下部に設置し、被支持部材240を仕切り板250の上面に配設する。
Further, the supported surface 240a is not limited to a concave shape, and may be a concave curved surface as shown in FIG. Therefore, the load applied to the position-adjustable fixed support member 1 can be further reduced.
31(d), the outer tube 14 has a partition plate 250 in the middle so that the inner tube 12 can be arranged above and below the partition plate 250. good too. In that case, the abutment cap 230 and the supported member 240 may be arranged above the partition plate 250. Here, the abutment cap 230 is installed below the inner tube 12 to partition the supported member 240. It is arranged on the upper surface of the plate 250 .

また、上記各実施形態の雄ねじ部において、リード方向が相異なる右ねじと左ねじの螺旋構造が形成される場合を例示したが、本発明はこれに限定されない。即ち、リード角及び/又はリード方向が相異なる第一及び第二螺旋構造となるような、あらゆる態様を含む。例えば、リード方向は同じでも、互いにリード角が異なるようにすればよい。 Moreover, in the male threaded portion of each of the above embodiments, the case where the helical structure of the right-handed screw and the left-handed screw with different lead directions is formed is illustrated, but the present invention is not limited to this. That is, it includes any aspect in which the lead angle and/or the lead direction are different from each other in the first and second helical structures. For example, even if the lead directions are the same, the lead angles may be different from each other.

本発明の支持構造を、位置可調固定支持部材によって二重管構造の外管を支持し、外管を内管に対して固定する場合を例に説明したが、支持構造は、二重管構造に限定して適用されるものではなく、位置可調固定支持部材によって被固定部材に対して所定位置に配置される支持体を支持するものであれば、適用される部材等は限定されない。 The support structure of the present invention has been described as an example in which the outer tube of the double-tube structure is supported by the position-adjustable fixed support member and the outer tube is fixed to the inner tube. The application is not limited to the structure, and the applicable member is not limited as long as it supports a support arranged at a predetermined position with respect to the member to be fixed by the position-adjustable fixed support member.

1…位置可調固定支持部材、10…二重管構造、12…内管、14…外管、16…孔部、20…軸部、22…雄ねじ部、22a…ねじ山、23…第一雄ねじ螺旋溝、24…第二雄ねじ螺旋溝、26…凸曲面端部、28…伝達端部、30,140,220…第一雌ねじ体、32…環状凸部、36…第一条部、38…第一変位部、40…第二雌ねじ体、42…環状凹部、46…第二条部、48…第二変位部、50…枢動機構、52…押圧部、54…分離防止部、56…受圧面、58…当接部、60…嵌合機構、80…外周面、82…内周面、90…分離防止部、94…外管側雌ねじ螺旋条、96…角ワッシャ、96a…孔、96b…係止端部、98…突起、100…突出部、100a…係止部、100b…傾斜部、120…挿嵌部材、122…筒部、124…フランジ、126…部材側雌ねじ部螺旋条、128…凹凸面、130…ナット形溶接部材、132…収容空間、142…係合部、150,200…ハウジング部、152…底部、160…付勢部、202…フランジ部、210…ナット、215…ワッシャ。


REFERENCE SIGNS LIST 1 Position adjustable fixed support member 10 Double tube structure 12 Inner tube 14 Outer tube 16 Hole 20 Shaft 22 Male thread 22a Thread 23 First Male spiral groove 24 Second male spiral groove 26 Convex surface end 28 Transmission end 30, 140, 220 First female screw 32 Annular projection 36 First thread 38 First displacement portion 40 Second female screw body 42 Annular concave portion 46 Second thread portion 48 Second displacement portion 50 Pivoting mechanism 52 Pressing portion 54 Separation preventing portion 56 Pressure receiving surface 58 Abutting portion 60 Fitting mechanism 80 Outer peripheral surface 82 Inner peripheral surface 90 Separation preventing portion 94 Outer tube side female thread helical thread 96 Square washer 96a Hole , 96b... Locking end portion 98... Projection 100... Protruding part 100a... Locking part 100b... Inclined part 120... Insertion member 122... Cylindrical part 124... Flange 126... Member-side internal screw part spiral Line 128 Concavo-convex surface 130 Nut-shaped welding member 132 Accommodating space 142 Engaging portion 150, 200 Housing portion 152 Bottom portion 160 Biasing portion 202 Flange portion 210 Nut , 215... washers.


Claims (13)

被固定部材に対して所定位置に配置される支持体を支持する支持構造であって、
上記支持体の外面に貫穿された孔部に挿通され、支持端部が該支持体の内面側に位置し、他端側が該外面よりも外側に位置する軸部を備え、
上記軸部は、
上記軸部に形成された雄ねじ部と、
上記雄ねじ部に螺合する第一雌ねじ体及び第二雌ねじ体を有し、上記軸部の軸方向の位置を調整可能に上記軸部を、上記支持体に対して固定し得る位置可調固定機構と、
上記支持端部に形成され、上記被固定部材に当接し、且つ、該被固定部材から受ける入力を、枢動して追随しながら受容して該支持体を支持可能とする枢動機構とを備え、
上記位置可調固定機構は、上記第一雌ねじ体に設けられる第一嵌合部と上記第二雌ねじ体に設けられる第二嵌合部とが互いに嵌合しているとき、上記軸部に軸方向及び/又は軸回り方向の外力が作用しても互いに嵌合して相対変位を規制するように構成され、
上記支持体に上記軸部を複数挿通し、前記枢動機構を上記被固定部材に当接させることで、上記被固定部材に対して上記支持体を固定することを特徴とする支持構造。
A support structure for supporting a support arranged at a predetermined position with respect to a member to be fixed,
a shaft inserted through a hole penetrating the outer surface of the support, the support end positioned on the inner surface side of the support, and the other end positioned outside the outer surface;
The shaft portion
a male threaded portion formed on the shaft;
Position adjustable fixation that has a first female threaded body and a second female threaded body that are screwed to the male threaded part, and can fix the shaft part to the support body so that the axial position of the shaft part can be adjusted. a mechanism;
a pivoting mechanism formed at the support end portion, abutting on the member to be fixed, and capable of supporting the support by receiving an input received from the member to be fixed while pivoting and following the input; prepared,
When the first fitting portion provided on the first female threaded body and the second fitting portion provided on the second female threaded body are fitted to each other, the position-adjustable fixing mechanism is adapted to configured to engage with each other to restrict relative displacement even when an external force acts in the direction and/or the axial direction;
A support structure, wherein the support is fixed to the member to be fixed by inserting a plurality of the shaft portions into the support and bringing the pivoting mechanism into contact with the member to be fixed.
前記第一嵌合部は、列状突起を成す第一条部を有し、
前記第二嵌合部は、前記第一条部と異なる方向に延在し、該第一条部と当接する列状突起を成す第二条部を有し、
前記位置可調固定機構は、上記第一条部と上記第二条部の間に押圧力が作用したとき、上記第一条部と上記第二条部の交差部分において上記第一条部の弾性及び/又は塑性変形によって第一変位部が作出され、且つ、上記交差部分において該第二条部の弾性及び/又は塑性変形によって第二変位部が作出され、これら上記第一変位部と上記第二変位部の相互が係合することによって嵌合状態を保持し得るように構成されることを特徴とする請求項1に記載の支持構造。
The first fitting portion has a first line portion forming a row of projections,
the second fitting portion has a second ridge extending in a direction different from that of the first ridge and forming a row of protrusions in contact with the first ridge;
The position-adjustable fixing mechanism is configured such that, when a pressing force acts between the first and second ridges, the first ridge is positioned at the intersection of the first and second ridges. A first displacement is created by elastic and/or plastic deformation, and a second displacement is created by elastic and/or plastic deformation of the second ridge at the intersection, wherein the first displacement and the 2. The support structure according to claim 1, wherein the second displacement portions are configured to maintain the fitted state by engaging each other.
前記第二嵌合部は、対向する前記第一嵌合部を収容し得る収容凹部を有し、
前記位置可調固定機構は、前記第一嵌合部と前記収容凹部が嵌合するように構成されることを特徴とする請求項1又は2に記載の支持構造。
The second fitting portion has an accommodation recess capable of accommodating the opposing first fitting portion,
3. The support structure according to claim 1, wherein the position-adjustable fixing mechanism is configured such that the first fitting portion and the accommodating recess are fitted.
前記収容凹部の内壁は、前記第二雌ねじ体の軸からの距離が周方向に沿って変動する形態、及び/又は、前記第一嵌合部の外壁は、前記第一雌ねじ体の軸からの距離が周方向に沿って変動する形態とされることにより、前記収容凹部の内壁と前記第一嵌合部の外壁の当接によって嵌合状態を得るように構成されることを特徴とする請求項3に記載の支持構造。 The inner wall of the housing recess has a form in which the distance from the axis of the second female thread body varies along the circumferential direction, and/or the outer wall of the first fitting part has a distance from the axis of the first female thread body. By adopting a configuration in which the distance varies along the circumferential direction, the fitting state is obtained by contact between the inner wall of the accommodating recess and the outer wall of the first fitting portion. 4. The support structure of claim 3. 前記雄ねじ部は、適宜のリード角及び/又はリード方向に設定され、前記第一雌ねじ体が螺合するように形成された第一螺旋溝と、
上記リード角及び/又はリード方向に対して相異なるリード角及び/又はリード方向に設定され、前記第二雌ねじ体が螺合するように形成された第二螺旋溝とを有し、
上記第二螺旋溝は、上記第一螺旋溝が形成された領域の少なくとも一部の領域で重複するように形成されていることを特徴とする請求項1乃至4の何れかに記載の支持構造。
The male thread portion is set to an appropriate lead angle and/or lead direction, and a first spiral groove formed so that the first female thread body is screwed together;
a second spiral groove that is set to a different lead angle and/or lead direction with respect to the lead angle and/or lead direction and is formed so that the second female screw body is screwed,
5. The support structure according to any one of claims 1 to 4, wherein the second spiral groove is formed so as to overlap at least a part of the region in which the first spiral groove is formed. .
前記雄ねじ部は、適宜のリード角及び/又はリード方向に設定され、前記第一雌ねじ体を螺合し得るように形成された第一螺旋溝と、
上記リード角及び/又はリード方向に対して相異なるリード角及び/又はリード方向に設定され、前記第二雌ねじ体を螺合し得るように形成された第二螺旋溝とを有し、
上記第二螺旋溝は、上記第一螺旋溝が形成された領域の少なくとも一部の領域で重複するように形成され、
記第一雌ねじ体に嵌合し得る、前記第二雌ねじ体の外周面に仮固定された接合部材を有し、
前記接合部材は、所定のトルクが付加されたとき、該接合部材における前記第二雌ねじ体に仮固定された部分が破壊され、前記第一雌ねじ体及び前記第二雌ねじ体に対して相対回転し、前記第一雌ねじ体及び前記第二雌ねじ体との接触部分の摩擦により溶融することを特徴とする請求項1に記載の支持構造。
The male threaded portion is set to an appropriate lead angle and/or lead direction, and a first spiral groove formed so that the first female threaded body can be screwed;
a second spiral groove that is set to a different lead angle and/or lead direction with respect to the lead angle and/or lead direction and is formed so that the second female screw body can be screwed,
The second spiral groove is formed so as to overlap at least a part of the region in which the first spiral groove is formed,
Having a joining member temporarily fixed to the outer peripheral surface of the second female threaded body that can be fitted to the first female threaded body,
When a predetermined torque is applied to the joining member, the portion of the joining member that is temporarily fixed to the second female thread body is destroyed, and the joining member rotates relative to the first female thread body and the second female thread body. 2. The support structure according to claim 1, wherein said first internal thread body and said second internal thread body are melted by friction of contact portions thereof.
前記枢動機構は、前記支持端部に形成された軸方向外方に向かって凸曲面状を成す凸曲面端部と、
上記凸曲面端部の曲面に沿って摺動可能に上記凸曲面端部に設けられ、前記被固定部材に当接する当接部を有することを特徴とする請求項1乃至6の何れかに記載の支持構造。
The pivoting mechanism includes a convexly curved end portion formed on the supporting end portion and forming a convexly curved surface shape outward in the axial direction;
7. The fixing member according to any one of claims 1 to 6, further comprising an abutting portion which is provided at the end portion of the convex curved surface so as to be slidable along the curved surface of the end portion of the convex curved surface and which abuts against the member to be fixed. support structure.
前記当接部は、前記被固定部材に対する当接部位に、弾性部材を有することを特徴とする請求項7に記載の支持構造。 8. The support structure according to claim 7, wherein the contact portion has an elastic member at a contact portion with respect to the member to be fixed. 前記軸部は、前記当接部を前記被固定部材側に付勢する付勢部を有することを特徴とする請求項7又は8に記載の支持構造。 9. The support structure according to claim 7 , wherein the shaft portion has a biasing portion that biases the contact portion toward the fixed member. 前記第一雌ねじ体は、前記支持体の外側で、前記枢動機構を収容する収容空間を有することを特徴とする請求項1乃至9の何れかに記載の支持構造。 10. The support structure according to any one of claims 1 to 9, wherein the first internal thread body has a housing space for housing the pivot mechanism outside the support body. 前記第一雌ねじ体は、前記支持体に溶接されて固定されることを特徴とする請求項1乃至10の何れかに記載の支持構造。 11. The support structure according to any one of claims 1 to 10, wherein the first female screw is welded and fixed to the support. 前記軸部は、前記支持体に対して周回状に配列され、前記枢動機構を前記被固定部材に複数の方向から当接させることで、前記被固定部材に対して前記支持体を固定することを特徴とする請求項1乃至11の何れかに記載の支持構造。 The shaft portion is arranged in a circle with respect to the support, and fixes the support to the member to be fixed by bringing the pivoting mechanism into contact with the member to be fixed from a plurality of directions. The support structure according to any one of claims 1 to 11, characterized in that: 前記被固定部材は、筒形状を有する内管であり、
前記支持体は、上記内管を囲繞し得る筒形状を有する外管であることを特徴とする請求項1乃至12の何れかに記載の支持構造。
The member to be fixed is an inner tube having a cylindrical shape,
13. The support structure according to any one of claims 1 to 12, wherein said support is an outer tube having a tubular shape capable of surrounding said inner tube.
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