JP2010031919A

JP2010031919A - Screw fastening mechanism

Info

Publication number: JP2010031919A
Application number: JP2008192711A
Authority: JP
Inventors: Tomomi Ishimaru; 智実石丸; Toshiyuki Okaya; 利之岡谷; Atsushi Yoshida; 敦吉田; Tomihisa Inoue; 富美久井上; Katsuji Miyata; 勝治宮田
Original assignee: Taisei Corp; Unytite Corp
Current assignee: Taisei Corp; Unytite Corp
Priority date: 2008-07-25
Filing date: 2008-07-25
Publication date: 2010-02-12
Anticipated expiration: 2028-07-25
Also published as: JP5281840B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screw fastening mechanism capable of generating a predetermined pull force in the axial direction without using a rod-like member for fastening such as a bolt having a diameter greater than necessary, without a great torsional force. <P>SOLUTION: The screw fastening mechanism comprises a through-hole 1h formed in a fastening object 1 in a fastening direction so as to fasten the fastening object 1 to an object 2 to be fastened, a coupler 9 having a female screw (first screw) formed in a position corresponding to the through-hole 1h of the object 2, a fastening rod-like member 3 passing through the through-hole 1h, having a male screw (second screw) screwed to the female screw at the end portion and a screw part (third screw) composed of the male screw at the base end portion, a nut 4 screwed to the screw part of the base end portion of the rod-like member 3. The screw fastening mechanism, which is adjacent to the base end portion of the screw part of the base end portion of the rod-like member 3, comprises a reaction receiving part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本願発明は、締結物を被締結物に締結用棒状部材を介して螺着することができる螺着締結機構に関し、特に、締結に際して前記棒状部材の全長にわたって無用な回転トルクが可及的に作用することのない螺着締結機構に関する。 The present invention relates to a screw-fastening mechanism capable of screwing a fastened object to a fastened object via a fastening bar-like member, and in particular, unnecessary rotational torque acts as much as possible over the entire length of the bar-like member during fastening. The present invention relates to a screw fastening mechanism that does not do this.

締結物に形成された貫通穴を貫通するよう配置されるボルト（締結用棒状部材）と前記ボルトに螺着するべく被締結物側に形成されたナットとを有する螺着締結機構を介して、締結物を被締結物に適正に螺着する場合、該ボルトにその軸方向の引張力が所定値だけ作用した状態で締結することが求められる。このような螺着締結機構は、種々の分野において用いられ、具体的には、例えば、内燃機関のクランクケースにシリンダブロックとシリンダヘッドとをアッセンブリする場合や、建築や土木の分野での締結、例えば、複数のセグメント同士を締結することによってトンネル等の通路を形成する際のセグメント間の通路長手方向の締結に使用する場合、所謂ボックカルバート間をプレストレス締結する場合等に使用されている。 Through a screw fastening mechanism having a bolt (fastening rod-like member) arranged so as to pass through a through hole formed in the fastened object and a nut formed on the fastened object side to be screwed to the bolt. When the fastening object is appropriately screwed to the article to be fastened, it is required to fasten the bolt in a state where the axial tensile force acts on the bolt for a predetermined value. Such a screw fastening mechanism is used in various fields. Specifically, for example, when assembling a cylinder block and a cylinder head to a crankcase of an internal combustion engine, fastening in the field of construction or civil engineering, For example, it is used for fastening in the longitudinal direction of the passage between segments when forming a passage such as a tunnel by fastening a plurality of segments, or for pre-stress fastening between so-called box culverts.

このような螺着締結機構として、特許文献１に記載されているものがある。
特許公開平９−１７７４９０号公報。 As such a screw fastening mechanism, there is one described in Patent Document 1.
Japanese Patent Publication No. 9-177490.

しかしながら、前記締結物の締結方向の寸法が大きい場合には、前記ボルトの軸長が長くなり、かかる場合、該ボルトに所定の軸方向の引張力を作用させようとすると、軸長が長いことにより該ボルトに大きな回転方向のねじり力が作用して、該ボルトにねじり力と軸方向の引張力の複合的な応力（ねじりと引張の組合せ応力）によってボルトが変形したり、該ボルトが損傷を受けることがある。かかる場合、所望の締結力を得ることができない。
具体的には、前述したエンジンのシリンダブロックとシリンダヘッドをクランクケースに螺着するような場合に使用される長尺締結用棒状部材（ボルト）や、あるいは地下トンネル等を形成するセグメント間をその通路長手方向に締結する場合に使用される長尺締結用棒状部材では、前述した技術的課題が生じることになる。 However, when the dimension of the fastening object in the fastening direction is large, the axial length of the bolt becomes long. In such a case, if a tensile force in a predetermined axial direction is applied to the bolt, the axial length is long. Due to this, a large rotational torsional force acts on the bolt, and the bolt is deformed or damaged by the combined stress of the torsional force and the axial tensile force (combined stress of torsion and tension). May receive. In such a case, a desired fastening force cannot be obtained.
Specifically, a long fastening rod-shaped member (bolt) used when the cylinder block and the cylinder head of the engine are screwed into the crankcase, or between the segments forming the underground tunnel, etc. In the long fastening rod-shaped member used when fastening in the longitudinal direction of the passage, the above-described technical problem occurs.

かかる対応策として、ボルトの径をねじり力（回転トルク）の付加に合わせて大きくすることも考えられるが、かかる場合には、必要以上に大きな径のボルトを使用することが余儀なくされ、その結果、重量的に重くなる。また、価格的にも高価になる。 As a countermeasure, it is conceivable to increase the diameter of the bolt in accordance with the addition of torsional force (rotational torque). In such a case, it is necessary to use a bolt having a larger diameter than necessary, and as a result, , Get heavier. In addition, the price becomes expensive.

本発明はこのような状況に鑑みておこなわれたもので、必要以上に大きな径のボルト等の締結用棒状部材を使用することなく前記技術的課題を解決した螺着締結機構を提供することを目的とする。 The present invention has been made in view of such a situation, and provides a screw fastening mechanism that solves the technical problem without using a fastening rod-like member such as a bolt having a larger diameter than necessary. Objective.

本発明にかかる螺着締結機構は、締結物を被締結物に締結するべく、該締結物に締結方向に形成された貫通穴と、前記被締結物の前記貫通穴に対応する位置に形成された雌ネジあるいは雄ねじのいずれか一方の第１のねじと、先端部に前記第１のねじに螺着する雄ねじあるいは雌ネジのいずれか一方の第２のねじを有するとともに基端部に雄ねじからなる第３のねじを有し前記貫通穴を貫通するように配置される締結用棒状部材と、該棒状部材の基端部の第３のねじに螺合するナットとを備えるとともに、
前記棒状部材の基端の第３のねじの基端側に隣接して、該第３のねじに前記ナットを緊締するべく螺着する際に発生する反力を受容する反力受部を備え、
前記締結物の貫通穴を通して前記棒状部材の先端の第２のねじを前記被締結物の第１のねじに螺着するとともに、該棒状部材の基端部の第３のねじに前記締結物の反被締結物側の面に接合するよう前記ナットを螺着して、前記反力受部に対して相対的にナットを回転せしめて、該被締結物に締結物を締結するよう構成したことを特徴とする。 The screw fastening mechanism according to the present invention is formed at a position corresponding to the through hole of the fastened object and a through hole formed in the fastened direction to fasten the fastened object to the fastened object. A first screw that is either a female screw or a male screw and a second screw that is either a male screw or a female screw that is screwed to the first screw at the distal end, and a male screw at the base end. A fastening rod-shaped member that has a third screw and is disposed so as to penetrate the through-hole, and a nut that is screwed to the third screw at the base end of the rod-shaped member,
A reaction force receiving portion is provided adjacent to the proximal end side of the third screw at the proximal end of the rod-shaped member and receives a reaction force generated when the nut is screwed onto the third screw to tighten the nut. ,
The second screw at the tip of the rod-shaped member is screwed to the first screw of the fastened object through the through-hole of the fastener, and the third screw at the proximal end of the rod-shaped member is screwed on the fastener. The nut is screwed so as to be joined to the surface of the object to be fastened, and the nut is rotated relative to the reaction force receiving portion so that the fastened object is fastened to the object to be fastened. It is characterized by.

しかして、前述のように構成された本発明にかかる螺着締結機構によれば、前記締結用棒状部材の基端を回転させることによって、該締結用棒状部材先端の第２のねじを、被締結物に設けられた第１のねじに螺着・締結して後、該締結用棒状部材にその軸方向に引張力を付与し該棒状部材を介して締結物を被締結物に締結する際に、該棒状部材の基端に形成された第３のねじに前記ナットを螺着して後反力受部を工具で把持した状態で該反力受部に対して相対的にナットを回転させて緊締する。このため、前記緊締に伴って発生するねじり力は、主として棒状部材の前記ナットが螺合した部位と反力受部との極く短い距離の間でのみ作用するため、棒状部材の全長にわたる無用なねじり力が可及的に作用せず、該棒状部材にその全長にわたって必要な軸方向の引張力のみ付与することが可能となる。 Thus, according to the screw fastening mechanism according to the present invention configured as described above, by rotating the base end of the fastening rod-shaped member, the second screw at the distal end of the fastening rod-shaped member is covered. After screwing and fastening to the first screw provided on the fastener, a tensile force is applied to the fastening rod-shaped member in the axial direction, and the fastener is fastened to the fastened object via the rod-shaped member. The nut is screwed onto a third screw formed at the base end of the rod-shaped member, and the nut is rotated relative to the reaction force receiving portion while the rear reaction force receiving portion is gripped by a tool. Let me tighten. For this reason, since the torsional force generated with the tightening acts mainly only within a very short distance between the portion of the bar-shaped member where the nut is screwed and the reaction force receiving portion, uselessness over the entire length of the bar-shaped member is unnecessary. Therefore, it is possible to apply only necessary axial tensile force to the rod-like member over the entire length thereof.

従って、引張力にのみ耐え得る径の棒状部材を使用することができ、このため、締結用棒状部材を無用に太径のものを使用する必要がなくなり、重量的に大きくならず、且つ、価格的にも高価になることはない。 Therefore, it is possible to use a rod-shaped member having a diameter that can only withstand a tensile force, and therefore, it is not necessary to use a large-diameter fastening rod-shaped member unnecessarily, and it does not increase in weight and costs. It will not be expensive.

また、前記螺着締結機構において、前記第２のねじが、ねじ節鉄筋の外周面に形成されたおねじにより構成され、
前記被締結物の前記第１のねじが、前記ねじ節鉄筋のおねじを螺着することができる雌ネジにより構成され、
前記棒状部材が、前記ねじ節鉄筋と、先端に形成されたボルト頭部が摩擦圧接により前記ねじ節鉄筋の基端側に一体に溶着されるとともに基端に反力受部を備えたボルトとによって、構成されていると、セグメント等の建築あるいは土木関係の螺着締結機構として、安価に実施することができる上で好ましい構成となる。 Further, in the screw fastening mechanism, the second screw is constituted by a male screw formed on an outer peripheral surface of the screw joint reinforcing bar,
The first screw of the article to be fastened is constituted by a female screw capable of screwing the male thread of the screw joint reinforcing bar,
The rod-shaped member includes the screw joint reinforcing bar and a bolt head formed at the tip thereof integrally welded to the proximal end side of the screw joint reinforcing rod by friction welding and a bolt provided with a reaction force receiving portion at the proximal end. Therefore, it is a preferable configuration because it can be implemented at a low cost as a screw fastening mechanism for construction such as segments or civil engineering.

また、前記螺着締結機構において、前記反力受部が、円柱状部材の周面に軸方向に延びる山と谷が交互に形成された略平歯車状の形態のもので構成されていると、該略平歯車状の部分でナットの回転に起因する反力（回転トルク）を確実に受けることができ、且つ、製造においても鍛造等によって簡単に成形できる点で、好ましい構成となる。 Further, in the screw fastening mechanism, when the reaction force receiving portion is configured in a substantially spur gear shape in which peaks and troughs extending in the axial direction are alternately formed on the circumferential surface of the columnar member. The substantially spur-gear-like portion is preferable because it can reliably receive a reaction force (rotational torque) caused by rotation of the nut and can be easily formed by forging in manufacturing.

また、前記螺着締結機構において、前記反力受部が、前記棒状部材の回転中心に対して外周面を偏心させて配置した柱状部材によって構成されていると、鍛造等によって簡単に製造できる点で、好ましい構成となる。 Further, in the screw fastening mechanism, the reaction force receiving portion can be easily manufactured by forging or the like if the reaction force receiving portion is constituted by a columnar member arranged with its outer peripheral surface being eccentric with respect to the rotation center of the rod-shaped member. Thus, a preferable configuration is obtained.

また、前記螺着締結機構において、前記棒状部材と締結物との間に、該締結物に対して該棒状部材を回転不能に係止する係止手段が介装され、この係止手段によって該棒状部材が該締結物に回転方向に係止された状態で、前記ナットを前記第３のねじに螺着するよう構成されていると、該棒状部材の係止手段が配置されている部位より先端側の部位には、全く回転トルク（ねじり力）が作用することのない構成を実現できる点で、好ましい。 Further, in the screw fastening mechanism, a locking means for locking the rod-shaped member with respect to the fastened material is non-rotatably interposed between the bar-shaped member and the fastened material. When the nut is screwed onto the third screw in a state in which the rod-like member is locked to the fastener in the rotational direction, the portion where the locking means of the rod-like member is disposed This is preferable in that a configuration in which no rotational torque (torsional force) acts on the distal end portion can be realized.

また、前記螺着締結機構において、締結物を被締結物に締結するべく、該締結物に締結方向に形成された貫通穴と、前記被締結物の前記貫通穴に対応する位置に形成された雌ネジあるいは雄ねじのいずれか一方の第１のねじと、先端部に前記第１のねじに螺着する雄ねじあるいは雌ネジのいずれか一方の第２のねじを有するとともに基端部に雄ねじからなる第３のねじを有し前記貫通穴を貫通するように配置される締結用棒状部材と、該締結用棒状部材の基端部の第３のねじに螺合するナットとを備えるとともに、
前記棒状部材の基端の第３のねじの基端側に隣接して、該第３のねじに前記ナットを緊締するべく螺着する際に発生する反力を受容する反力受部を備え、
前記締結物の貫通穴を通して前記棒状部材の先端の第２のねじを前記被締結物の第１のねじに螺着するとともに、該棒状部材の基端部の第３のねじに前記締結物の反被締結物側の面に接合するよう前記ナットを螺着して、前記反力受部に対して相対的にナットを回転せしめて、該被締結物に締結物を締結するように構成し、
前記締結部を被締結物に締結するに際して、前記貫通穴に前記締結用棒状部材を貫通させ、前記反力受部を固定することなく、前記締結用棒状部材の基端を回転させることによってその先端の第２のねじを第１のねじに螺合させて、該螺合による第１の回転方向の歪みを前記締結用棒状部材に生じさせ、かかる状態において、前記反力受部を固定した状態で前記ナットを該締結用棒状部材の先端の前記第３のねじに螺合させることによって、該締結用棒状部材に引張力を付与し、かかる螺合によって前記第１の回転方向と逆の第２の回転方向の歪みを前記締結用棒状部材に生じさせて、該締結用棒状部材に作用する回転方向の残留ねじり量を少なくして締結することを特徴とする。 Further, in the screw fastening mechanism, in order to fasten the fastening object to the fastened object, the through hole formed in the fastening direction in the fastening object and the position corresponding to the through hole of the fastened object are formed. It has either a first screw of either a female screw or a male screw, a second screw of either a male screw or a female screw that is screwed to the first screw at the tip, and a male screw at the base end A fastening rod-like member that has a third screw and is disposed so as to penetrate the through-hole, and a nut that is screwed into the third screw at the proximal end of the fastening rod-like member;
A reaction force receiving portion is provided adjacent to the proximal end side of the third screw at the proximal end of the rod-shaped member and receives a reaction force generated when the nut is screwed onto the third screw to tighten the nut. ,
The second screw at the tip of the rod-shaped member is screwed to the first screw of the fastened object through the through-hole of the fastener, and the third screw at the proximal end of the rod-shaped member is screwed on the fastener. The nut is screwed so as to be joined to the surface of the object to be fastened, and the nut is rotated relative to the reaction force receiving portion so that the fastened object is fastened to the object to be fastened. ,
When the fastening portion is fastened to the article to be fastened, the fastening rod-shaped member is passed through the through hole, and the base end of the fastening rod-shaped member is rotated without fixing the reaction force receiving portion. A second screw at the front end is screwed into the first screw, and a first rotational direction distortion caused by the screwing is generated in the fastening rod-like member. In this state, the reaction force receiving portion is fixed. In this state, the nut is screwed onto the third screw at the tip of the fastening rod-like member, thereby applying a tensile force to the fastening rod-like member, and the screwing is opposite to the first rotation direction. A second rotational direction distortion is caused in the fastening rod-like member, and the fastening is performed with a reduced amount of residual twist in the rotational direction acting on the fastening rod-like member.

以下、本発明の実施形態にかかる螺着締結機構について、セグメントの締結用に使用するための螺着締結機構を例に挙げて、図面を参照しながら具体的に説明する。 Hereinafter, a screw fastening mechanism according to an embodiment of the present invention will be described in detail with reference to the drawings, taking a screw fastening mechanism used for fastening segments as an example.

図１は本発明の実施形態にかかる螺着締結機構の一部の構成を示す斜視図、図２は図１に示す構成を含む本発明にかかる螺着締結機構の全体の構成を、締結しようとする締結物と被締結物となる一対のセグメントと共に、その締結部位を長手方向に断面して示す側断面図である。 FIG. 1 is a perspective view showing a configuration of a part of a screw fastening mechanism according to an embodiment of the present invention. FIG. 2 is a diagram showing an overall configuration of the screw fastening mechanism according to the present invention including the configuration shown in FIG. It is side sectional drawing which shows the fastening site | part by cut | disconnecting the fastening site | part with a pair of segments used as fastening object and to-be-fastened object to a longitudinal direction.

図２において、１は締結物であるトンネルの壁面の一部を形成する部分円筒体の形態を有する第１のセグメント、２は被締結物である締結物と実質上同じ形態のものでトンネルの壁面の一部を形成する部分円筒体の形態を有する第２のセグメント、３は先端に第２のねじを備えた締結用棒状部材、４はナット、Ｂは前記棒状部材３とセグメント１の間に介装され該棒状部材３を回転不能に係止する係止手段である。 In FIG. 2, 1 is a first segment having a shape of a partial cylindrical body that forms a part of a wall surface of a tunnel that is a fastening object, and 2 is substantially the same shape as a fastening object that is a fastening object. A second segment having a shape of a partial cylindrical body forming a part of the wall surface, 3 is a fastening rod-like member having a second screw at the tip, 4 is a nut, and B is between the rod-like member 3 and segment 1 It is a locking means that is interposed by the locking member and locks the rod-shaped member 3 so as not to rotate.

図２あるいは図３，図４に図示するように、前記締結物である第１のセグメント１には、締結方向（図２において矢印Ｘで示す方向）に前記棒状部材３を貫通するための貫通穴１ｈを有し、この貫通穴１ｈは前記棒状部材３をその外周方に隙間を有して貫通させることができる穴径を有する。また、この貫通穴１ｈは、基端部に基端方で拡径した部分円錐状の形態のテーパ部１ｒを有する。 As shown in FIG. 2 or FIG. 3 and FIG. 4, the first segment 1 as the fastener is penetrated to penetrate the rod-like member 3 in the fastening direction (direction indicated by arrow X in FIG. 2). The through hole 1h has a hole diameter that allows the rod-like member 3 to pass therethrough with a gap around the outer periphery. In addition, the through hole 1h has a tapered portion 1r having a partially conical shape whose diameter is expanded at the proximal end at the proximal end.

そして、前記貫通穴１ｈの基端方（反被締結物方；図２の左端側）の開口端部には、前記係止手段Ｂの一部を構成する固定金具５Ａがセグメント１と一体になるよう埋設されている。また、この固定金具５Ａは、該係止手段Ｂの他の一部を構成する係止具５Ｂを回動不能に係止できるように構成されている。前記係止手段Ｂは、この実施形態では、前記固定金具５Ａと係止具５Ｂと、後述するボルト３Ａの頭部３ｈ及び係合部５ｇの穴５ｃとによって形成されている。
前記固定金具５Ａは、図１にその斜視図が拡大して図示され又図３に側断面図が拡大して図示されるように、前記貫通穴１ｈ（図３，図４参照）と同芯状になった、穴断面が六角形状の貫通穴５ｈを有し、全体の外形状が肉厚の板状の形態を有する。 A fixing metal 5A constituting a part of the locking means B is integrally formed with the segment 1 at the opening end of the base end of the through hole 1h (the anti-fastened object side: the left end in FIG. 2). It is buried to become. Further, the fixing bracket 5A is configured to be able to lock a locking tool 5B constituting another part of the locking means B so as not to be rotatable. In this embodiment, the locking means B is formed by the fixing bracket 5A, the locking tool 5B, a head 3h of a bolt 3A, which will be described later, and a hole 5c of an engaging portion 5g.
The fixing bracket 5A is concentric with the through hole 1h (see FIGS. 3 and 4), as shown in an enlarged perspective view in FIG. 1 and an enlarged side sectional view in FIG. The hole cross section has a hexagonal through hole 5h, and the entire outer shape has a thick plate shape.

また、図１あるいは図３に図示される如く、前記固定金具５Ａの貫通穴５ｈには、前記係止具５Ｂが回動不能に挿着される。このため、この係止具５Ｂは先端側に、前記貫通穴５ｈの穴断面形状とその外形状が合致し外形寸法が該穴断面よりやや小さい、六角状の係合部５ｇを有する。また、この係合部５ｇの内部には、六角形状の穴５ｃ（図３参照）が軸方向に延設されている。そして、この係止具５Ｂの基端部には、前記貫通穴５ｈの穴径より大きい外形を有する鍔部５ｂが形成されている。
しかし、この係止手段Ｂは、前述した図１〜図３に図示する構成のものに限定されるものでなく、図５に図示するように、固定金具５Ａの貫通穴を楕円形に構成し、係止具５Ｂの係合部５ｇの外形状を前記楕円に係合する楕円形状に形成してもよい。要するに、回転不能に係止するという機能を奏するものであればよく、例えば、ねじり中心（あるいは軸芯とも言える）に対して外周面が非円形の貫通穴５ｈとその貫通穴５ｈに係合する外形状を有する係合部５ｇとの組合せ等によって構成すればよい。 As shown in FIG. 1 or FIG. 3, the locking member 5B is non-rotatably inserted into the through hole 5h of the fixing bracket 5A. For this reason, this locking tool 5B has a hexagonal engagement portion 5g on the distal end side, in which the hole cross-sectional shape of the through hole 5h matches the outer shape and the outer dimension is slightly smaller than the hole cross-section. Further, a hexagonal hole 5c (see FIG. 3) extends in the axial direction inside the engaging portion 5g. And the collar part 5b which has an outer shape larger than the hole diameter of the said through-hole 5h is formed in the base end part of this locking tool 5B.
However, the locking means B is not limited to the structure shown in FIGS. 1 to 3 described above, and the through hole of the fixing bracket 5A is formed in an elliptical shape as shown in FIG. The outer shape of the engaging portion 5g of the locking tool 5B may be formed in an elliptical shape that engages with the ellipse. In short, it may be anything as long as it has a function of locking in a non-rotatable manner. For example, the outer peripheral surface engages with the non-circular through hole 5h and the through hole 5h with respect to the torsion center (or the axis). What is necessary is just to comprise by the combination with the engaging part 5g which has an outer shape.

ところで、前記棒状部材３は、図１，図３に図示するように、この実施形態では、基端部に反力受部３ａを具備し先端に頭部３ｈを具備したボルト３Ａ（本発明の「第３のねじ」に相当）と、その先端方（図１，図３において右方）に一体に固着された所謂「ねじ節鉄筋」からなる棒状部３Ｂとを具備するように構成されている。そして、前記ボルト３Ａの頭部３ｈは前記棒状部３Ｂの基端と、摩擦圧接により、同芯状になるように、溶着されることによって一体の棒状部材３に構成されている。また、この棒状部材３の頭部３ｈは、前記係合部５ｇに形成されている六角形状の穴５ｃ内に回動不能に挿着されるよう構成されている。 By the way, as shown in FIGS. 1 and 3, the rod-shaped member 3 includes a bolt 3A (in the present invention) having a reaction force receiving portion 3a at the base end and a head 3h at the tip. (Corresponding to a “third screw”) and a rod-like portion 3B composed of a so-called “threaded reinforcing bar” integrally fixed to the tip end thereof (to the right in FIGS. 1 and 3). Yes. The head 3h of the bolt 3A is formed into an integral rod-like member 3 by being welded so as to be concentric with the base end of the rod-like portion 3B by friction welding. Further, the head portion 3h of the rod-like member 3 is configured to be non-rotatably inserted into a hexagonal hole 5c formed in the engaging portion 5g.

そして、この棒状部材３の先端には、ねじ節鉄筋３の外周のおねじにより構成される「ねじ」、即ち、本発明でいう「第２のねじ」を、具備している。 The rod-shaped member 3 is provided with a “screw” constituted by a male screw on the outer periphery of the threaded reinforcing bar 3, that is, a “second screw” according to the present invention.

また、この実施形態では、図１あるいは図３に図示するように、前記反力受部３ａは、前記ボルト３Ａの外径より小径の円柱部材の外周面に軸方向に延びる山と谷が交互に形成された略平歯車（スプライン）状の形態のもので構成されている。また、この反力受部３ａの先端方には、所定のねじり応力（回転トルク）が作用すると切断するように所謂「くびれ部」３ｃ（図３参照）が形成されている。
ところで、この反力受部３ａは、前記形態のものに限定されるものでなく、例えば、前記ボルト３Ａの回転中心に対して外周面が非円形の、例えば偏心させた形態のものであってよい。具体的には、例えば、図５に図示するように、軸断面が楕円（あるいは小判形）の柱状の形態のもので構成されていてもよい。あるいは、図示しないが、断面が矩形状（あるいは多角形状）の柱状体によって構成することも可能である。 In this embodiment, as shown in FIG. 1 or FIG. 3, the reaction force receiving portion 3a has alternating peaks and valleys extending in the axial direction on the outer peripheral surface of the cylindrical member having a smaller diameter than the outer diameter of the bolt 3A. It is comprised by the thing of the shape of the substantially spur gear (spline) shape formed in this. Also, a so-called “necked portion” 3c (see FIG. 3) is formed at the tip of the reaction force receiving portion 3a so as to be cut when a predetermined torsional stress (rotational torque) is applied.
By the way, the reaction force receiving portion 3a is not limited to the one in the above-described form, and for example, has a non-circular outer peripheral surface with respect to the rotation center of the bolt 3A, for example, an eccentric form. Good. Specifically, for example, as shown in FIG. 5, the shaft section may be configured in an elliptical (or oval) columnar form. Alternatively, although not shown, the cross section may be constituted by a columnar body having a rectangular shape (or polygonal shape).

また、図２，図４に図示するように、前記第２のセグメント２の前記第１のセグメント１の先端面１ｆが締結される基端面２ｆには、前記貫通穴１ｈに対応する位置に、貫通穴２ｈが該貫通穴１ｈに対して同軸状になるように形成されている。そして、この貫通穴２ｈは、基端面２ｆ方で拡径するテーパ穴になっている。
そして、この貫通穴２ｈ内には、前記棒状部材３を構成する前記ねじ節鉄筋３の先端部が一体に螺着可能な、本発明の「第１のねじ」を構成する雌ネジを有するナット型カプラー９が、該セグメント２と一体になるよう配置されている。そして、このカプラー９の先端は、前記セグメント２に埋設されたねじ節鉄筋１３の基端と螺着され、該ねじ節鉄筋１３対して回転不能及び軸方向の移動不能となるようロックナット１４によってロックされている。
また、前記ねじ節鉄筋１３の先端（図２において右端）には、図２に図示するように、埋設されるセグメント２に対する固定を確実にし該ねじ節鉄筋１３の軸方向の耐引き抜き力を向上させるためのアンカー部材１５が配置されている。
また、前記カプラー９は、長手方向に通常のナットに比べて十分長い寸法、つまり、一対のねじ節鉄筋３，１３を両側に螺着することができる程度に長い寸法を有する。 As shown in FIGS. 2 and 4, the base end surface 2 f to which the distal end surface 1 f of the first segment 1 of the second segment 2 is fastened is located at a position corresponding to the through hole 1 h. The through hole 2h is formed so as to be coaxial with the through hole 1h. And this through-hole 2h is a taper hole diameter-expanded by the base end surface 2f direction.
And in this through-hole 2h, the nut which has the internal thread which comprises the "first screw" of this invention in which the front-end | tip part of the said screw joint reinforcing bar 3 which comprises the said rod-shaped member 3 can be screwed together. A mold coupler 9 is arranged so as to be integrated with the segment 2. The distal end of the coupler 9 is screwed to the base end of the screw joint reinforcing bar 13 embedded in the segment 2 and is locked by the lock nut 14 so that the screw joint reinforcing bar 13 cannot rotate and cannot move in the axial direction. Locked.
Further, as shown in FIG. 2, the distal end (right end in FIG. 2) of the screw joint 13 is securely fixed to the embedded segment 2 and the axial pull-out resistance of the thread joint 13 is improved. An anchor member 15 is provided for the purpose.
The coupler 9 has a dimension that is sufficiently longer than a normal nut in the longitudinal direction, that is, a dimension that is long enough to screw the pair of threaded reinforcing bars 3 and 13 to both sides.

なお、この実施形態では、「第１のねじ」を、カプラー９の雌ネジで構成するとともに、「第２のねじ」を、前記棒状部材３のねじ節鉄筋３の外周の雄ねじで構成しているが、これに代えて、逆の構成、つまり、「第１のねじ」を雌ネジ（ナット）で、「第２のねじ」を雄ねじ（ボルト）で構成することもできる。 In this embodiment, the “first screw” is constituted by the female screw of the coupler 9, and the “second screw” is constituted by the male screw on the outer periphery of the screw joint reinforcing bar 3 of the rod-shaped member 3. However, instead of this, the reverse configuration, that is, the “first screw” can be constituted by a female screw (nut) and the “second screw” can be constituted by a male screw (bolt).

しかして、図６に図示するように、前述のように構成された第２のセグメント２に前記第１のセグメント１を締結する際には、つまり、この実施形態では円筒状のトンネルの壁面の一部を構成している前記第２のセグメント２の基端面２ｆに、前記第１のセグメント１の先端面１ｆを当接した状態で、両セグメント１，２同士を締結する際には、まず、該第２のセグメント２の貫通穴２ｈに、第１のセグメント１の貫通穴１ｈが一致するように、該第１のセグメント１をセットする。
かかる状態において、前記第１のセグメント１の貫通穴１ｈの基端方（図２において左端方）から、前記係止金具５Ａの貫通穴５ｈを通して、前記棒状部材３を、そのボルト３Ａ側が基端方に位置するように挿通する。
そして、前記棒状部材３を回転させて、その先端部の雄ねじを前記第２のセグメント２に配置されているカプラー９の雌ネジに螺着する。この螺着に際しては、該棒状部材３は、貫通穴１ｈ内を径方向に隙間を有して回転させることができるため、この棒状部材３に大きな回転トルクが作用することはない。
そして、前記第１のセングメント１の端面部に埋設されている前記係止金具５Ａの貫通穴５ｈに、前記係止具５Ｂの係合部５ｇを挿入し、該係止具５Ｂの鍔部５ｂが係止金具５Ａの貫通穴５ｈの周囲の端面に当接するように、該係止具５Ｂをセットする。かかる状態において、六角柱形状の前記ボルト３Ａの頭部３ｈが前記係合部５ｇの六角形状の穴５ｃに挿着されて、ボルト３Ａ、つまり、棒状部材３は、第１のセグメント１（係止金具５Ａ）に対して、回転不能となる。 Therefore, as shown in FIG. 6, when the first segment 1 is fastened to the second segment 2 configured as described above, that is, in this embodiment, the wall surface of the cylindrical tunnel is When the segments 1 and 2 are fastened together with the distal end surface 1f of the first segment 1 in contact with the proximal end surface 2f of the second segment 2 constituting a part, The first segment 1 is set so that the through hole 1h of the first segment 1 coincides with the through hole 2h of the second segment 2.
In such a state, the rod-shaped member 3 is connected to the base end of the first segment 1 from the base end (left end in FIG. 2) of the first segment 1 through the through hole 5h of the locking bracket 5A. Insert so that it is located in the direction.
Then, the rod-shaped member 3 is rotated, and the male screw at the distal end thereof is screwed to the female screw of the coupler 9 disposed in the second segment 2. At the time of this screwing, the rod-shaped member 3 can be rotated in the through hole 1h with a gap in the radial direction, so that a large rotational torque does not act on the rod-shaped member 3.
And the engaging part 5g of the said locking tool 5B is inserted in the through-hole 5h of the said locking metal fitting 5A embed | buried under the end surface part of the said 1st segment 1, and the collar part 5b of this locking tool 5B The locking tool 5B is set so that is in contact with the end surface around the through hole 5h of the locking metal fitting 5A. In this state, the head 3h of the hexagonal column-shaped bolt 3A is inserted into the hexagonal hole 5c of the engaging portion 5g, and the bolt 3A, that is, the rod-shaped member 3 is connected to the first segment 1 (engagement). It cannot be rotated with respect to the fastener 5A).

この状態において、前記鍔部５ｂの基端方から、前記棒状部材３のボルト３Ａに平座金７を挿着し、しかる後に、前記ナット４を螺着する。勿論、前記平座金７に代えて、スプリングワッシャを用いてもよい。 In this state, the plain washer 7 is inserted into the bolt 3A of the rod-like member 3 from the base end of the flange 5b, and then the nut 4 is screwed. Of course, a spring washer may be used instead of the plain washer 7.

かかる状態において、前記反力受部３ａに工具を係合させて、ナット４の回転に起因する反力を該反力受部３ａで受けることができる状態で、該ナット４を該反力受部３ａに対して相対的に回転させる。なお、この実施形態では、ナット４を回転させるための反力が前記反力受部３ａに作用するよう構成された油圧式のレンチ（動力工具）で回転させている。このため、かかる回転に起因して発生する反力は反力受部３ａと前記係止手段Ｂとで全て受容されるため、かかる回転によって、前記棒状部材３のナット４が係合している部分（この実施形態の場合、正確には前記ボルト３Ａ）より先端方の部位には一切の回転トルクは作用しない。そして、この棒状部材３には、セグメント１，２間の締結に必要な引張力のみが生ずる。なお、この引張力は、前記第１のセグメント１に対して、圧縮力として作用する。 In such a state, a tool is engaged with the reaction force receiving portion 3a so that the reaction force receiving portion 3a can receive the reaction force caused by the rotation of the nut 4 with the reaction force receiving portion 3a. Rotate relative to the part 3a. In this embodiment, the reaction force for rotating the nut 4 is rotated by a hydraulic wrench (power tool) configured to act on the reaction force receiving portion 3a. For this reason, since the reaction force generated due to the rotation is completely received by the reaction force receiving portion 3a and the locking means B, the nut 4 of the rod-shaped member 3 is engaged by the rotation. No rotational torque acts on the portion (in the case of this embodiment, precisely the bolt 3A) at the tip end portion. And only the tensile force required for the fastening between the segments 1 and 2 arises in this rod-shaped member 3. This tensile force acts on the first segment 1 as a compressive force.

また、前記反力受部３ａの先端方に前記くびれ部３ｃが形成されていることから、前記ナット４の締付け過程において所定の値の回転トルクが作用するようになると、該くびれ部３ｃが回転トルクにより切断する。このため、所定値以上の大きな前記回転トルクがナット４と棒状部材３との間に作用するような状態を回避することが可能となる。 Further, since the constricted portion 3c is formed at the distal end of the reaction force receiving portion 3a, the constricted portion 3c rotates when a predetermined rotational torque is applied during the tightening process of the nut 4. Cut by torque. For this reason, it becomes possible to avoid a state in which a large rotational torque of a predetermined value or more acts between the nut 4 and the rod-shaped member 3.

また、前記くびれ部３ｃが切断されると、所定の回転トルクにより締結用棒状部材３が締結されたことが確認できることになる。 When the constricted portion 3c is cut, it can be confirmed that the fastening rod-like member 3 is fastened by a predetermined rotational torque.

従って、本実施形態にかかる螺着締結機構によれば、前記締結用棒状部材３に無用な回転トルクを作用させることなく、締結に必要な軸方向の引張力のみを棒状部材３に付与することが可能となる。 Therefore, according to the screw fastening mechanism according to the present embodiment, only the axial tensile force necessary for fastening is applied to the rod-shaped member 3 without applying unnecessary rotational torque to the rod-shaped member 3 for fastening. Is possible.

このため、締結用棒状部材を無用に太径のものを使用する必要がなくなり、重量的に大きくならず、且つ、価格的にも高価になることはない。 For this reason, it is not necessary to use an unnecessarily large-diameter fastening rod-shaped member, so that it does not increase in weight and is not expensive in price.

また、本発明の最もシンプルな構成の実施形態としては、図７，図８に図示するように、前記係止手段Ｂ（図１，図３，図５等参照）を設ける必要はなく、かかる場合にも、本発明の基本的な作用効果を奏することができる。なお、図７，図８に記載の実施形態については、前述した実施形態と説明が重複するため、図１〜図５に記載した実施形態と同じ構成について、同じ参照符号を付して、その説明を省略する。なお、図７，図８において、１５は中央に棒状部材３を挿通させるための貫通穴１５ｈを備えた端部金具である。
そして、この図７，図８に図示した構成を具備した螺着締結機構について、実際に本発明の効果を確認するために実験（検証）したところ、反力受部３ａを具備しない形態（本発明でない形態）のものでは、棒状部材３の棒状部（ねじ節鉄筋）３Ｂの径が４０ｍｍで長さが１５００ｍｍでその長手方向の中央に歪みゲージを配置して、ナット４を回転させたところ以下のとおりであった。つまり、図９のグラフに図示するように、まず、回転トルクの大きさと歪みの値との相関関係を得るために、ナット４の回転トルクを１００Ｎ・ｍで回転させると前記棒状部材３に「−６５０×１０-6 ％」の歪み（図９の「Ｐ１」の点参照）が発生し、同じく２００Ｎ・ｍで回転させると「−１３００×１０-6 ％」の歪み（図９の「Ｐ２」の点参照）が発生し、同じく３００Ｎ・ｍで回転させると「−１６５０×１０-6 ％」の歪み（図９の「Ｐ３」の点参照）が発生することが判った。 Further, as an embodiment of the simplest configuration of the present invention, as shown in FIGS. 7 and 8, there is no need to provide the locking means B (see FIGS. 1, 3 and 5 etc.). Even in this case, the basic effects of the present invention can be achieved. 7 and 8 are the same as those in the embodiment described above, and therefore, the same configurations as those in the embodiment described in FIGS. Description is omitted. 7 and 8, reference numeral 15 denotes an end fitting provided with a through hole 15h for inserting the rod-like member 3 in the center.
7 and 8 were tested (verified) in order to actually confirm the effect of the present invention, the configuration without the reaction force receiving portion 3a (this book) In a non-inventive form, the diameter of the rod-shaped part (screw joint bar) 3B of the rod-shaped member 3 is 40 mm, the length is 1500 mm, a strain gauge is arranged in the center in the longitudinal direction, and the nut 4 is rotated. It was as follows. That is, as illustrated in the graph of FIG. 9, first, in order to obtain a correlation between the magnitude of the rotational torque and the value of the distortion, when the rotational torque of the nut 4 is rotated at 100 N · m, −650 × 10 −6% ”(refer to the point“ P1 ”in FIG. 9), and when rotating at 200 N · m, the distortion of“ −1300 × 10 −6% ”(“ P2 in FIG. It was found that a distortion of “−1650 × 10 −6%” (refer to the point of “P3” in FIG. 9) occurs when rotating at 300 N · m.

次に、本螺着締結機構にかかる作用効果を得るべく、反力受部３ａを保持せずナット４を締付けると、第１の方向の「−３５０×１０-6 ％」の歪み（図９の「Ｐ４」の点参照）が発生し、反力受部３ａとナット４とを相対的に回転させた本締めの当初において「−３５０×１０-6 ％」の歪み（図９の「Ｐ５」の点参照）が発生した。そして、「所定の回転トルク（具体的には反力受部３ａがくびれ部３ｃで破断するトルク）」で締めたときに、逆の方向（図９において上方向：第２の方向）の歪みとして「１３５０×１０-6 ％」の歪み（図９の「Ｐ６」の点参照）が生じた。このことから、仮に、前記反力受部３ａを設けない場合には、前記仮締めのとき「Ｐ４」と前記所定の回転トルクで締めたとき「Ｐ６」の差、つまり、「１７００×１０-6 ％」だけ、前記仮締めのときの歪み（「−３５０×１０-6 ％」の歪み）から同じ方向（図９において下方向）に歪む。即ち、歪みの無い状態から「−２０５０×１０-6 ％」の歪み（図９の「Ｐ７」の点参照）が発生することが推測できる。
これに対して、本発明の如く反力受部３ａを設けた場合には、前記仮締めのときの歪み（「−３５０×１０-6 ％」の歪み）から「１７００×１０-6 ％」だけ反対方向（図９において上方向）に歪んで、その結果、歪みの無い状態からは「１３５０×１０-6 ％」（図９の「Ｐ６」参照）の歪みが生じることになる。なお、前記歪み量「Ｐ１」〜「Ｐ３」から前記「所定の回転トルク」等の回転トルクの値を知ることができる。 Next, when the nut 4 is tightened without holding the reaction force receiving portion 3a in order to obtain the effect of the present screw fastening mechanism, a distortion of “−350 × 10 −6%” in the first direction (FIG. 9). (Refer to the point “P4” in FIG. 9), and a distortion of “−350 × 10 −6%” (“P5” in FIG. 9) at the beginning of the final tightening in which the reaction force receiving portion 3a and the nut 4 are relatively rotated. ”) Occurred. Then, when tightened with “predetermined rotational torque (specifically, torque at which the reaction force receiving portion 3a breaks at the constricted portion 3c)”, distortion in the reverse direction (upward direction in FIG. 9: second direction) As a result, distortion of “1350 × 10 −6%” (see the point of “P6” in FIG. 9) occurred. Accordingly, if the reaction force receiving portion 3a is not provided, the difference between “P4” when temporarily tightened and “P6” when tightened with the predetermined rotational torque, that is, “1700 × 10 − Only 6% "is distorted in the same direction (downward in FIG. 9) from the distortion during temporary fastening (" -350 × 10-6% "distortion). That is, it can be inferred that distortion of “−2050 × 10 −6%” (see the point of “P7” in FIG. 9) occurs from the state without distortion.
On the other hand, in the case where the reaction force receiving portion 3a is provided as in the present invention, the distortion at the time of temporary fastening ("-350 x 10-6%") is "1700 x 10-6%". As a result, a distortion of “1350 × 10 −6%” (see “P6” in FIG. 9) occurs from the state without distortion. The value of the rotational torque such as the “predetermined rotational torque” can be known from the distortion amounts “P1” to “P3”.

そして、前記実験により、本発明にかかる反力受部を具備した螺着締結機構を採用すると、棒状部材３の歪み（残留びずみ量）が、従来の反力受部を設けないものと比べて、約４０％（＝１−（１３５０／２０５０））削減できることが判明した。 And if the screwing fastening mechanism provided with the reaction force receiving portion according to the present invention is adopted by the experiment, the distortion (residual splatter amount) of the rod-shaped member 3 is compared with that in which the conventional reaction force receiving portion is not provided. It was found that about 40% (= 1− (1350/2050)) can be reduced.

そして、前記反力受部に加えて、図１〜図５に図示する如く、係止手段をさらに設けると、前述のように、該係止手段より先端側の部位の棒状部材には全く歪みが発生しない優れた螺着締結機構となる。 In addition to the reaction force receiving portion, as shown in FIGS. 1 to 5, when a locking means is further provided, as described above, the rod-like member at the distal end side of the locking means is completely distorted. This is an excellent screwing and fastening mechanism that does not generate any problems.

ところで、前記実施形態では、セグメント間を締結する螺着締結機構を例に挙げて説明したが、その他の締結、例えば、エンジンのクランクケースにシリンダブロックとシリンダヘッドとを締結するような場合、あるいは建築や土木の分野での締結に使用する場合、例えば、所謂ボックカルバートの長手方向へプレストレス締結する場合、基礎のアンカーボルトを基礎完成後に設置する場合等に、本発明にかかる螺着締結機構を同様に使用することができる。 By the way, in the said embodiment, although demonstrated taking the case of the screwing fastening mechanism which fastens between segments, for example, when a cylinder block and a cylinder head are fastened to a crankcase of an engine, or When used for fastening in the field of construction or civil engineering, for example, when prestressed in the longitudinal direction of so-called Bock culverts, when installing anchor bolts after foundation completion, etc., the screw fastening mechanism according to the present invention Can be used as well.

本発明は、前述した実施形態に限定されるものでなく、当業者が自明の範囲において、適宜変更した形態で実施することができることは言うまでもない。 It goes without saying that the present invention is not limited to the above-described embodiment, and can be implemented in a mode appropriately modified by those skilled in the art.

本発明にかかる螺着締結機構は、種々の締結物と被締結物間の締結に利用することができる。 The screw fastening mechanism according to the present invention can be used for fastening between various fastening objects and fastened objects.

本発明の実施形態にかかる螺着締結機構の一部の構成を示す斜視図である。It is a perspective view showing some composition of a screw fastening mechanism concerning an embodiment of the present invention. 図１に示す構成を含む本発明にかかる螺着締結機構の全体の概略の構成を締結しようとする締結物と被締結物となるセグメントと共に締結部位を断面して示す側断面図である。FIG. 2 is a side cross-sectional view showing a fastening part together with a fastening object to be fastened and a segment to be fastened, together with a fastening object to be fastened, and an overall fastening structure of the screw fastening mechanism according to the present invention including the structure shown in FIG. 1. 図２に示す第１のセグメント（締結物）の基端部分を拡大した部分拡大断面図である。It is the elements on larger scale which expanded the base end part of the 1st segment (fastened article) shown in FIG. 図２に示す第１のセグメント（締結物）と第２のセグメント（被締結物）との締結部分を拡大した部分拡大断面図である。It is the elements on larger scale which expanded the fastening part of the 1st segment (fastening thing) and the 2nd segment (fastening thing) shown in FIG. 図１に示す螺着構造と異なる実施形態にかかる螺着締結構造の一部の構成を示す斜視図である。It is a perspective view which shows the structure of a part of screwing fastening structure concerning embodiment different from the screwing structure shown in FIG. 締結物である第１のセグメントと被締結物である第２のセグメントとの締結の形態を示す斜視図である。It is a perspective view which shows the form of fastening with the 1st segment which is a fastening thing, and the 2nd segment which is a to-be-fastened thing. 係止手段を具備しない本発明にかかる螺着締結機構の実施形態の締結前の状態を示す斜視図である。It is a perspective view which shows the state before the fastening of embodiment of the screw fastening mechanism concerning this invention which does not comprise a latching means. 図７に示す螺着締結機構の締結後の状態を示す第１のセグメント（締結物）の基端部分を拡大した部分拡大断面図である。It is the elements on larger scale which expanded the base end part of the 1st segment (fastened thing) which shows the state after the fastening of the screw fastening mechanism shown in FIG. 縦軸に歪みを横軸に時間軸をとって、図７，図８に示す螺着締結機構の棒状部材の歪みの状態と、反力受部がない場合の歪みを示した図である。FIG. 9 is a diagram showing the state of distortion of the rod-like member of the screw fastening mechanism shown in FIGS. 7 and 8 and the distortion when there is no reaction force receiving portion, with the vertical axis representing strain and the horizontal axis representing time.

符号の説明Explanation of symbols

１…第１のセグメント（締結物）
１ｈ…貫通穴
２…第２のセグメント（被締結物）
３…締結用棒状部材
３Ａ…ねじ部（第３のねじ）
３ａ…反力受部
３ｔ…雄ねじ（第２のねじ）
４…ナット
９…雌ネジ（第１のねじ）を備えたカプラー 1 ... 1st segment (fastening thing)
1h ... through hole
2 ... Second segment (fastened object)
3 ... Rod-shaped member for fastening
3A ... Screw part (third screw)
3a ... Reaction force receiving part
3t ... male screw (second screw)
4 ... Nut
9 ... Coupler with female thread (first thread)

Claims

締結物を被締結物に締結するべく、該締結物に締結方向に形成された貫通穴と、前記被締結物の前記貫通穴に対応する位置に形成された雌ネジあるいは雄ねじのいずれか一方の第１のねじと、先端部に前記第１のねじに螺着する雄ねじあるいは雌ネジのいずれか一方の第２のねじを有するとともに基端部に雄ねじからなる第３のねじを有し前記貫通穴を貫通するように配置される締結用棒状部材と、該棒状部材の基端部の第３のねじに螺合するナットとを備えるとともに、
前記棒状部材の基端の第３のねじの基端側に隣接して、該第３のねじに前記ナットを緊締するべく螺着する際に発生する反力を受容する反力受部を備え、
前記締結物の貫通穴を通して前記棒状部材の先端の第２のねじを前記被締結物の第１のねじに螺着するとともに、該棒状部材の基端部の第３のねじに前記締結物の反被締結物側の面に接合するよう前記ナットを螺着して、前記反力受部に対して相対的にナットを回転せしめて、該被締結物に締結物を締結するよう構成したことを特徴とする螺着締結機構。 In order to fasten the fastened object to the fastened object, either a through hole formed in the fastened direction in the fastening direction and either a female screw or a male screw formed at a position corresponding to the through hole of the fastened object The first screw has a second screw that is either a male screw or a female screw that is screwed to the first screw at the tip, and a third screw that is a male screw at the base end, and the penetration A fastening rod-shaped member disposed so as to pass through the hole, and a nut screwed into the third screw at the base end of the rod-shaped member;
A reaction force receiving portion is provided adjacent to the proximal end side of the third screw at the proximal end of the rod-shaped member and receives a reaction force generated when the nut is screwed onto the third screw to tighten the nut. ,
The second screw at the tip of the rod-shaped member is screwed to the first screw of the fastened object through the through-hole of the fastener, and the third screw at the proximal end of the rod-shaped member is screwed on the fastener. The nut is screwed so as to be joined to the surface of the object to be fastened, and the nut is rotated relative to the reaction force receiving portion so that the fastened object is fastened to the object to be fastened. The screw fastening mechanism characterized by this.

前記第２のねじが、ねじ節鉄筋の外周面に形成されたおねじにより構成され、
前記被締結物の前記第１のねじが、前記ねじ節鉄筋のおねじを螺着することができる雌ネジにより構成され、
前記棒状部材が、前記ねじ節鉄筋と、先端に形成されたボルト頭部が摩擦圧接により前記ねじ節鉄筋の基端側に一体に溶着されるとともに基端に反力受部を備えたボルトとによって、構成されていることを特徴とする請求項１記載の螺着締結機構。 The second screw is constituted by a male screw formed on the outer peripheral surface of the screw joint reinforcing bar,
The first screw of the article to be fastened is constituted by a female screw capable of screwing the male thread of the screw joint reinforcing bar,
The rod-shaped member includes the screw joint reinforcing bar and a bolt head formed at the tip thereof integrally welded to the proximal end side of the screw joint reinforcing rod by friction welding and a bolt provided with a reaction force receiving portion at the proximal end. The screw fastening mechanism according to claim 1, wherein:

前記反力受部が、円柱状部材の周面に軸方向に延びる山と谷が交互に形成された略平歯車状の形態のもので構成されていることを特徴とする請求項１又は２記載の螺着締結機構。 The said reaction force receiving part is comprised by the thing of the shape of the substantially spur gear shape by which the peak and trough which extend in an axial direction were alternately formed in the surrounding surface of a cylindrical member. The screw fastening mechanism as described.

前記反力受部が、前記棒状部材の回転中心に対して外周面を偏心させて配置した柱状部材によって構成されていることを特徴とする請求項１又は２記載の螺着締結機構。 3. The screw fastening mechanism according to claim 1, wherein the reaction force receiving portion is constituted by a columnar member arranged with an outer peripheral surface being decentered with respect to a rotation center of the rod-shaped member.

前記棒状部材と締結物との間に、該締結物に対して該棒状部材を回転不能に係止する係止手段が介装され、この係止手段によって該棒状部材が該締結物に回転方向に係止された状態で、前記ナットを前記第３のねじに螺着するよう構成されていることを特徴とする請求項１〜４のいずれか１の項に記載の螺着締結機構。 Between the rod-shaped member and the fastener, a locking means for locking the rod-shaped member with respect to the fastener is non-rotatably interposed. By the locking means, the rod-shaped member rotates in the fastener. The screw fastening mechanism according to any one of claims 1 to 4, wherein the nut is screwed onto the third screw in a state where the nut is locked to the screw.

締結物を被締結物に締結するべく、該締結物に締結方向に形成された貫通穴と、前記被締結物の前記貫通穴に対応する位置に形成された雌ネジあるいは雄ねじのいずれか一方の第１のねじと、先端部に前記第１のねじに螺着する雄ねじあるいは雌ネジのいずれか一方の第２のねじを有するとともに基端部に雄ねじからなる第３のねじを有し前記貫通穴を貫通するように配置される締結用棒状部材と、該締結用棒状部材の基端部の第３のねじに螺合するナットとを備えるとともに、
前記棒状部材の基端の第３のねじの基端側に隣接して、該第３のねじに前記ナットを緊締するべく螺着する際に発生する反力を受容する反力受部を備え、
前記締結物の貫通穴を通して前記棒状部材の先端の第２のねじを前記被締結物の第１のねじに螺着するとともに、該棒状部材の基端部の第３のねじに前記締結物の反被締結物側の面に接合するよう前記ナットを螺着して、前記反力受部に対して相対的にナットを回転せしめて、該被締結物に締結物を締結するように構成し、
前記締結部を被締結物に締結するに際して、前記貫通穴に前記締結用棒状部材を貫通させ、前記反力受部を固定することなく、前記締結用棒状部材の基端を回転させることによってその先端の第２のねじを第１のねじに螺合させて、該螺合による第１の回転方向の歪みを前記締結用棒状部材に生じさせ、かかる状態において、前記反力受部を固定した状態で前記ナットを該締結用棒状部材の先端の前記第３のねじに螺合させることによって、該締結用棒状部材に引張力を付与し、かかる螺合によって前記第１の回転方向と逆の第２の回転方向の歪みを前記締結用棒状部材に生じさせて、該締結用棒状部材に作用する回転方向の残留ねじり量を少なくして締結することを特徴とする螺着締結機構。 In order to fasten the fastened object to the fastened object, either a through hole formed in the fastened direction in the fastening direction and either a female screw or a male screw formed at a position corresponding to the through hole of the fastened object The first screw has a second screw that is either a male screw or a female screw that is screwed to the first screw at the tip, and a third screw that is a male screw at the base end, and the penetration A fastening rod-shaped member disposed so as to pass through the hole, and a nut screwed into a third screw at the proximal end of the fastening rod-shaped member;
A reaction force receiving portion is provided adjacent to the proximal end side of the third screw at the proximal end of the rod-shaped member and receives a reaction force generated when the nut is screwed onto the third screw to tighten the nut. ,
The second screw at the tip of the rod-shaped member is screwed to the first screw of the fastened object through the through-hole of the fastener, and the third screw at the proximal end of the rod-shaped member is screwed on the fastener. The nut is screwed so as to be joined to the surface of the object to be fastened, and the nut is rotated relative to the reaction force receiving portion so that the fastened object is fastened to the object to be fastened. ,
When the fastening portion is fastened to the article to be fastened, the fastening rod-shaped member is passed through the through hole, and the base end of the fastening rod-shaped member is rotated without fixing the reaction force receiving portion. A second screw at the front end is screwed into the first screw, and a first rotational direction distortion caused by the screwing is generated in the fastening rod-like member. In this state, the reaction force receiving portion is fixed. In this state, the nut is screwed onto the third screw at the tip of the fastening rod-like member, thereby applying a tensile force to the fastening rod-like member, and the screwing is opposite to the first rotation direction. A screw fastening mechanism characterized in that a second rotational direction distortion is generated in the fastening rod-shaped member, and fastening is performed with a reduced amount of residual twist in the rotational direction acting on the fastening rod-shaped member.