JP5481763B1

JP5481763B1 - Flange welding positioning device

Info

Publication number: JP5481763B1
Application number: JP2013002306A
Authority: JP
Inventors: 秀利林田
Original assignee: シンセイ工機株式会社
Priority date: 2013-01-10
Filing date: 2013-01-10
Publication date: 2014-04-23
Anticipated expiration: 2033-01-10
Also published as: JP2014133247A

Abstract

【課題】簡単な構成及び低コスト、小型、軽量でしかも簡単な操作で良好なフランジ面とパイプとの直角度を有する位置決めを行なうフランジの溶接位置決め装置を提供する。
【解決手段】フランジの溶接位置決め装置１は、円筒管２端部へのフランジ４の溶接位置決め装置であり、フランジ４の中央孔に円筒管２を挿通させた状態で円筒管の端面２ｆ近傍に配置され、円筒管の端面２ｆと平行な面に含まれるところのフランジ面４ａに当たる当たり部を円筒管２端縁の外周複数位置に形成する複数の位置決め部材５と、複数の位置決め部材５を円筒管２の等角度位置に押し付け離開自在に装着する装着機構６と、を有する。変形ゲージをパイプ端面にあてがった状態で作業者の勘等に頼って行なう作業に比較してパイプ軸との直角度を簡単かつ正確に出して溶接位置を決める。
【選択図】図２To provide a welding positioning apparatus for a flange which performs positioning having a right angle between a flange surface and a pipe with a simple structure and low cost, small size, light weight and simple operation.
A flange welding positioning device 1 is a welding positioning device for a flange 4 to the end of a cylindrical tube 2, and the cylindrical tube 2 is inserted through a central hole of the flange 4 near the end surface 2 f of the cylindrical tube. A plurality of positioning members 5 which are arranged and form contact portions corresponding to the flange surface 4a included in a plane parallel to the end face 2f of the cylindrical tube at a plurality of positions on the outer periphery of the end of the cylindrical tube 2; A mounting mechanism 6 that presses against the equiangular position of the tube 2 and is mounted so as to be freely opened and closed. Compared to the work performed by relying on the operator's intuition or the like with the deformation gauge applied to the pipe end face, the perpendicularity to the pipe shaft is determined easily and accurately to determine the welding position.
[Selection] Figure 2

Description

本発明はフランジとパイプとの溶接作業時にパイプに対するフランジとの溶接位置を決めて溶接作業を行いやすいようにさせるフランジの溶接位置決め装置に関する。 The present invention relates to a welding positioning apparatus for a flange that determines the welding position of a flange with respect to a pipe at the time of welding work between the flange and a pipe so as to facilitate the welding work.

流体配管パイプや弁などを接続する接続部品として、パイプの外周から鍔状に突出するフランジを一体に取り付けてフランジ継手を形成し、フランジ同士をボルト・ナット等の締結部材で締結させてパイプを接続する管継手が知られている。フランジ継手を製作する際には、円筒パイプの端縁外周部分にドーナツ円盤形のフランジを溶接により接続固定する。フランジ付のパイプ同士の連結、あるいはフランジ付のパイプと流体処理装置等との接続時には、フランジ面を利用して連結されるから、フランジとパイプとの直角度が精度良く保持されている必要がある。例えばフランジ付のパイプ同士の連結に際しては、フランジとパイプとの直角度が保持されていないと複数のフランジパイプを接続した長い配管流路を形成したり、あるいは曲がり管を介して曲がり流路を形成する場合に、フランジ同士の接続位置がしだいにずれて最終的に締結部材による締結が困難となる場合を生じる。一方、フランジとパイプとの溶接は、フランジの孔にパイプを挿入しパイプの先端がフランジの板面と面一ではなく板面からやや後退した位置で溶接する必要がある。パイプの先端とフランジの板面とを面一に合わせた状態で溶接すると溶接ビードが盛り上がり、フランジ面同士を付き合わせた場合に密着性が得られず、シール性が損なわれる。
従来、フランジとパイプとの溶接作業においては、図１９、図２０に示すように、パイプ１５０を適宜の支持部材により水平状に支持し、パイプの端部１５２の外周にフランジ１５３のフランジ孔１５４をあてがって挿入させ、水平部１５６と直角部１５８を一体連結した変形ゲージ１６０の水平部１５６をパイプの外周頂部に設置しフランジの突設部分を乗り越えて延設した直角部１５８をフランジの縦、横等複数の直径位置にあてがった状態でそれぞれ仮溶接し、位置が決まったところで本溶接を行うものであった。この際、図１９に示すように、パイプ先端をフランジの板面から後退した位置で位置決めるためにゲージと交差する上側のパイプ−フランジ当接部の近傍位置ｗ１（図２０参照）を溶接仮付けし、次にゲージと交差する下側のパイプ−フランジ当接部の近傍位置ｗ２を溶接仮付けする手順で行い、それを鎖線示のように９０度回転位置、あるいは他の回転位置で何回か行って、それらの仮付け溶接後に本溶接を行うものであり、１個のフランジが例えば１０ｋｇ（キログラム）あるいはそれ以上の重量の場合、フランジ孔へのパイプ先端部の挿通作業あるいは仮付けのための細かな位置ずらし作業を伴って、容易ではなく、作業時間もかかりフランジ継手製作の作業効率を低下させるものであった。一方、特許文献１において、溶接フランジ取付工具についての提案がなされている。 As connecting parts to connect fluid piping pipes, valves, etc., flanges protruding from the outer periphery of the pipe are integrally attached to form flange joints, and the flanges are fastened with fastening members such as bolts and nuts to connect the pipes. Connecting pipe joints are known. When manufacturing the flange joint, a donut disk-shaped flange is connected and fixed to the outer peripheral portion of the end of the cylindrical pipe by welding. When connecting flanged pipes, or connecting flanged pipes and fluid processing equipment, etc., the flange surface is used for connection, so the perpendicularity between the flange and pipe must be maintained with high accuracy. is there. For example, when connecting flanged pipes, if the perpendicularity between the flange and the pipe is not maintained, a long pipe flow path connecting a plurality of flange pipes is formed, or a bent flow path is formed via a bent pipe. When forming, the connection position of flanges will shift | deviate gradually and the case where fastening by a fastening member becomes difficult finally arises. On the other hand, for welding the flange and the pipe, it is necessary to insert the pipe into the hole of the flange and weld the pipe at a position where the tip of the pipe is not flush with the plate surface of the flange but slightly receded from the plate surface. If welding is performed with the pipe tip and the plate surface of the flange being flush with each other, the weld bead rises, and when the flange surfaces are brought together, adhesion cannot be obtained, and the sealing performance is impaired.
Conventionally, in a welding operation between a flange and a pipe, as shown in FIGS. 19 and 20, the pipe 150 is horizontally supported by an appropriate support member, and the flange hole 154 of the flange 153 is formed on the outer periphery of the end portion 152 of the pipe. The horizontal portion 156 of the deformation gauge 160, in which the horizontal portion 156 and the right-angle portion 158 are integrally connected, is installed on the outer peripheral top portion of the pipe, and the right-angle portion 158 extending over the protruding portion of the flange is installed in the vertical direction of the flange. In this state, temporary welding was performed in a state of being applied to a plurality of diameter positions such as laterally, and main welding was performed when the positions were determined. At this time, as shown in FIG. 19, in order to position the pipe tip at a position retracted from the plate surface of the flange, a position w1 (see FIG. 20) in the vicinity of the upper pipe-flange contact portion intersecting with the gauge is temporarily welded. Next, the position w2 near the lower pipe-flange contact portion that intersects the gauge is welded and temporarily attached, and this is performed at the 90 ° rotation position as shown by the chain line, or at other rotation positions. If the flange has a weight of, for example, 10 kg (kilogram) or more, the pipe tip is inserted into the flange hole or temporarily attached. For this reason, it is not easy and requires a long time to move the position of the flange joint. On the other hand, in patent document 1, the proposal about the welding flange attachment tool is made | formed.

特開２０１０−２６００９２号JP 2010-260092 A

特許文献１の溶接フランジ取付工具は、パイプを水平移動可能にパイプ受台１に支持させ、溶接フランジを支持する垂直及び角度調整可能なあて板４を設けてパイプに対するフランジの位置決めを行なうものである。しかしながら、特許文献１の溶接フランジ取付工具は、構造が複雑で大型化、重量化しており、操作も簡単ではなく装置コストも高いという問題があった。 The welding flange mounting tool disclosed in Patent Document 1 is configured to support a pipe on a pipe cradle 1 so that the pipe can move horizontally, and to provide a vertical and angle-adjustable cover plate 4 that supports the welding flange to position the flange with respect to the pipe. is there. However, the welding flange mounting tool of Patent Document 1 has a problem that the structure is complicated, the size and weight are increased, the operation is not easy, and the apparatus cost is high.

本発明は上記従来の課題に鑑みてなされたものであり、その目的は、簡単な構成及び低コストであり、かつ、小型、軽量でしかも簡単な操作で良好なフランジ面とパイプとの直角度を有する位置決めを行なうことのできるフランジの溶接位置決め装置を提供することにある。 The present invention has been made in view of the above-described conventional problems, and an object thereof is a perpendicularity between a flange surface and a pipe that has a simple structure and low cost, and that is small, light, and easy to operate. It is providing the welding positioning apparatus of the flange which can perform positioning which has this.

上記課題を解決するために、本発明は、円筒管端部へのフランジの溶接位置決め装置１、１−２，１−３，１−４であり、フランジ４の中央孔に円筒管２を挿通させた状態で円筒管２の端面２ｆ近傍に配置され、円筒管の端面と平行な面に含まれるところのフランジ面４ａに当たる当たり部７を円筒管端縁の外周複数位置に形成する複数の位置決め部材５、５１，５２，５３，５４１，５４２，５４３と、複数の位置決め部材を円筒管の周方向等角度位置に押し付け離開自在に装着する装着機構６と、を有し、位置決め部材５、５１，５２，５３，５４１，５４２，５４３は、円筒管２の軸線ＣＬ方向で円筒管の内壁２ａに沿って延びて当接配置される内壁当接部１０と、内壁当接部と直角状に接続してＬ字体を成すＬ字杆部材からなる外周突設部であり、フランジ面に当たる当たり部を有してその隅部が円筒管の端縁に係合する外周突設部１２と、を含み、外周突設部１２と内壁当接部１０との接続部位であるＬ字体の隅部に内壁当接部の円筒管内壁との当接位置よりも円筒管の軸線から半径方向に長い位置に設けた段差面と、段差面から直角方向に設けられ円筒管の端面に当接する差部と、を含む段差部１４が設けられ、段差部は、円筒管２の端面２ｆと平行な面８に含まれる当たり部７から段差面１４ａと差部１４ｂとによる段差を形成し、円筒管２の軸線ＣＬに沿って円筒管の端縁から離隔する方向であってフランジの厚み幅より小さな幅で突設され、フランジのフランジ面を当たり部に当接させた際に段差面と円筒管の外周面が面一に設定されるように設けられ、外周突設部１２は、当たり部７と段差部１４とを含み、さらに、位置決め部材の外周突設部１２と内壁当接部１０とは別体で構成され分割されて外周突設部１２が円筒管２の半径外方向に向けて近接離開自在に移動可能とされ、段差部上面１４ａと円筒管２外面が断面で面一となる所要の移動位置で固定されるように厚み調整位置決めを行う、厚み調整位置決め機構２７が設けられたフランジの溶接位置決め装置１、１−２、１−３，１−４から構成される。 In order to solve the above-mentioned problems, the present invention is a welding positioning device 1, 1-2, 1-3, 1-4 of a flange to the end of a cylindrical tube, and the cylindrical tube 2 is inserted through the center hole of the flange 4 A plurality of positionings that are arranged in the vicinity of the end surface 2f of the cylindrical tube 2 in a state where they are in contact and that form contact portions 7 that contact the flange surface 4a included in a plane parallel to the end surface of the cylindrical tube at a plurality of positions on the outer periphery of the cylindrical tube edge. It possesses a member 5,51,52,53,541,542,543, a mounting mechanism 6 to distract freely mounted pressing a plurality of positioning members in the circumferential direction like the angular position of the cylindrical tube, a positioning member 5 and 51 , 52, 53, 541, 542, and 543 extend in the direction of the axis CL of the cylindrical tube 2 along the inner wall 2 a of the cylindrical tube and are arranged in contact with the inner wall contacting portion 10, and perpendicular to the inner wall contacting portion. Outer circumference consisting of L-shaped flange members connected to form an L-shape An outer peripheral projecting portion 12 having a contact portion that contacts the flange surface and having a corner portion engaged with the edge of the cylindrical tube, and the outer peripheral projecting portion 12 and the inner wall contacting portion 10 A step surface provided at the corner of the L-shaped body, which is a connection site, at a position longer in the radial direction from the axis of the cylindrical tube than the contact position of the inner wall contact portion with the cylindrical tube inner wall, and provided at a right angle from the step surface A step portion 14 including a difference portion that contacts the end surface of the cylindrical tube, and the step portion includes a step surface 14a and a difference portion 14b from the contact portion 7 included in the surface 8 parallel to the end surface 2f of the cylindrical tube 2. Is formed so as to protrude from the end of the cylindrical tube along the axis CL of the cylindrical tube 2 with a width smaller than the thickness width of the flange, and the flange surface of the flange is brought into contact with the contact portion The step surface and the outer peripheral surface of the cylindrical tube are set to be flush with each other. The portion 12 includes a contact portion 7 and a stepped portion 14, and the outer peripheral protruding portion 12 and the inner wall abutting portion 10 of the positioning member are separately formed and divided so that the outer peripheral protruding portion 12 is the cylindrical tube 2. Thickness adjustment positioning is performed so that the upper surface 14a of the stepped portion and the outer surface of the cylindrical tube 2 are fixed at a required moving position that is flush with the cross section. It is comprised from the welding positioning apparatus 1, 1-2, 1-3, 1-4 of the flange in which the positioning mechanism 27 was provided.

さらに、位置決め部材５は、円筒管２の直径位置に２個配置されるように設けられ、装着機構６は、それぞれの位置決め部材を支持しつつ円筒管の直径方向に伸縮自在に係合し、任意の伸縮位置で固定して位置決め部材５を円筒管２の端面近傍に密接装着させる伸縮固定装置１８からなるとよい。（第１実施形態図２，３，４、第２実施形態図５、図６） Further, two positioning members 5 are provided at the diameter position of the cylindrical tube 2, and the mounting mechanism 6 is engaged with the respective positioning members so as to expand and contract in the diameter direction of the cylindrical tube, It is good to comprise the expansion-contraction fixing device 18 which fixes in arbitrary expansion-contraction positions and mounts the positioning member 5 close to the end surface vicinity of the cylindrical tube 2. (First embodiment FIGS. 2, 3, and 4, second embodiment FIGS. 5 and 6)

また、位置決め部材５４１，５４２，５４３は、円筒管２の端縁に等角度に複数個配置されるように設けられ、装着機構６は、位置決め部材に接続されて複数個の位置決め部材を円筒管の半径方向に同時に拡大縮小自在に支持する拡大縮小装置６０と、拡大縮小装置に接続されて円筒管外からの操作で位置決め部材の内壁当接部１０を円筒管の内壁２ａに押し当て状に当接させる操作部６２と、を含むとよい。（第４実施形態図８〜１６） Further, a plurality of positioning members 541, 542, and 543 are provided to be arranged at equal angles on the end edge of the cylindrical tube 2, and the mounting mechanism 6 is connected to the positioning member to connect the plurality of positioning members to the cylindrical tube. And an enlargement / reduction device 60 that supports the enlargement / reduction device simultaneously in the radial direction, and an inner wall contact portion 10 of the positioning member pressed against the inner wall 2a of the cylindrical tube by being operated from the outside of the cylindrical tube connected to the enlargement / reduction device. And an operation unit 62 to be brought into contact with. (Fourth embodiment FIGS. 8 to 16)

また、拡大縮小装置６０は、３個の位置決め部材５４１，５４２，５４３を支持しつつ相互に連係して円筒管２の管孔に挿入しやすいように可変保形させる複数のリンク部材７０Ａ〜７０Ｃ、７２Ａ〜７２Ｃと付勢部材７４とを有するとよい。 Further, the enlargement / reduction device 60 supports a plurality of positioning members 541, 542, 543 and is linked to each other so as to be variably retained so as to be easily inserted into the tube hole of the cylindrical tube 2. 72A to 72C and the urging member 74.

さらに、位置決め部材５１，５２，５３は、円筒管２の端縁に等角度に３個配置されるように設けられ、装着機構６は、等角度に３個配置される３個の位置決め部材をそれぞれ支持する支持杆２８Ａ、２８Ｂ、２８Ｃと、半径方向となる等角度三方向に向けて各支持杆を伸縮移動させる伸縮移動装置３０と、を有するとよい。（第３実施形態図７） Furthermore, the positioning members 51, 52, and 53 are provided so as to be arranged at three equal angles on the edge of the cylindrical tube 2, and the mounting mechanism 6 includes three positioning members arranged at three equal angles. The support rods 28A, 28B, and 28C that support each other, and the expansion and contraction movement device 30 that expands and contracts each support rod in three equiangular directions that are radial directions may be provided. (Third embodiment FIG. 7)

本発明のフランジの溶接位置決め装置によれば、円筒管端部へのフランジの溶接位置決め装置であり、フランジの中央孔に円筒管を挿通させた状態で円筒管の端面近傍に配置され、円筒管の端面と平行な面に含まれるところのフランジ面に当たる当たり部を円筒管端縁の外周複数位置に形成する複数の位置決め部材と、複数の位置決め部材を円筒管の等角度位置に押し付け離開自在に装着する装着機構と、を有する構成であるから、簡単な操作で良好な精度のフランジ面とパイプとの直角度を有する位置決めを短時間で行なうことが可能である。また、構成が簡単で低コストであり、かつ、小型、軽量で操作性が良く、作業時間短縮、作業コスト低減を達成し得る。 According to the flange welding positioning device of the present invention, the flange welding positioning device to the end of the cylindrical tube is disposed near the end surface of the cylindrical tube in a state where the cylindrical tube is inserted through the central hole of the flange. A plurality of positioning members that form a contact portion that contacts the flange surface included in a plane parallel to the end surface of the cylindrical tube at a plurality of positions on the outer periphery of the end of the cylindrical tube, and the plurality of positioning members are pressed at equal angular positions on the cylindrical tube so as to be freely separated Therefore, it is possible to perform positioning with a right angle between the flange surface and the pipe with good accuracy in a short time with a simple operation. In addition, the structure is simple and low cost, and it is small, light and easy to operate, and the working time can be shortened and the working cost can be reduced.

また、円筒管の端面と平行な面に含まれる当たり部から段差を形成し、円筒管の軸線に沿って円筒管の端縁から離隔する方向に突設された段差部を有する構成とすることにより、段差部により形成されたフランジ面と円筒管端面との位置の違いによる段差凹部を利用して溶接痕を生じない部位での溶接が可能となり、溶接位置決め精度並びに溶接作業性を向上させることが可能である。 Further, a step is formed from a contact portion included in a plane parallel to the end face of the cylindrical tube, and a step portion is provided so as to protrude from the end of the cylindrical tube along the axis of the cylindrical tube. This makes it possible to weld at a portion where no welding mark is generated by using a step recess due to a difference in position between the flange surface formed by the step portion and the end surface of the cylindrical tube, and improve welding positioning accuracy and welding workability. Is possible.

また、位置決め部材は、円筒管の軸線方向で円筒管の内壁に沿って当接配置される内壁当接部と、内壁当接部と直角状に接続してＬ字体を成す外周突設部であり、その隅部が円筒管の端縁に係合する外周突設部と、を含み、外周突設部と内壁当接部との接続部位であるＬ字体の隅部に段差部が設けられている構成とすることにより、位置決め部材を円筒管の内壁にあてがって当接させるだけで段差部に対応した、フランジ面と円筒管端面との位置の違いによる段差凹部を形成させることができ、溶接位置決め精度並びに溶接作業性向上を実効可あらしめることができる。 Further, the positioning member includes an inner wall abutting portion that is abutted and disposed along the inner wall of the cylindrical tube in the axial direction of the cylindrical tube, and an outer peripheral projecting portion that is connected to the inner wall abutting portion at a right angle to form an L-shaped body. A step portion is provided at a corner portion of the L-shaped body, which is a connecting portion between the outer peripheral protruding portion and the inner wall contact portion. By adopting the configuration, it is possible to form a step recess due to a difference in position between the flange surface and the end surface of the cylindrical tube, corresponding to the stepped portion by simply placing the positioning member on the inner wall of the cylindrical tube and making contact with it. It is possible to effectively improve the welding positioning accuracy and the welding workability.

また、外周突設部は、当たり部と段差部とを含み、さらに、位置決め部材の外周突設部と内壁当接部とは別体で構成され分割されて外周突設部が円筒管の半径外方向に向けて近接離開自在に移動可能とされ、段差部上面と円筒管外面が断面で面一となる所要の移動位置で固定されるように厚み調整位置決めを行う、厚み調整位置決め機構が設けられた構成とすることにより、異なる厚みを有する複数の円筒管についても段差部上面と円筒管外面が断面で面一に設定でき、フランジ面と円筒管端面との位置の違いによる段差凹部を簡単、確実に形成させて、溶接位置決め精度並びに溶接作業性向上を実効可あらしめることができる。 The outer peripheral protruding portion includes a contact portion and a stepped portion, and the outer peripheral protruding portion and the inner wall contact portion of the positioning member are configured separately and divided so that the outer peripheral protruding portion is a radius of the cylindrical tube. A thickness adjustment positioning mechanism is provided that can move toward and away from the outside, and adjusts the thickness so that the upper surface of the stepped portion and the outer surface of the cylindrical tube are fixed at a required movement position that is flush with the cross section. With this configuration, the upper surface of the stepped portion and the outer surface of the cylindrical tube can be set to be the same in cross section for a plurality of cylindrical tubes having different thicknesses, and the stepped recess due to the difference in position between the flange surface and the end surface of the cylindrical tube can be simplified. Therefore, it is possible to make sure that welding positioning accuracy and welding workability are improved.

また、位置決め部材は、円筒管の直径位置に２個配置されるように設けられ、装着機構は、それぞれの位置決め部材を支持しつつ円筒管の直径方向に伸縮自在に係合し、任意の伸縮位置で固定して位置決め部材を円筒管の端面近傍に密接装着させる伸縮固定装置からなるようにすることにより、位置決め部材を円筒管の半径方向に伸縮させ、任意の伸縮位置で固定させて簡単かつ短時間に円筒軸との直角度を保持しうる当たり部を形成でき、直角に溶接し得るフランジの円筒管に対する溶接位置決めを実現することができる。 In addition, two positioning members are provided at the diameter position of the cylindrical tube, and the mounting mechanism is engaged with each positioning member so as to be extendable in the diameter direction of the cylindrical tube, and can be arbitrarily expanded and contracted. The positioning member can be expanded and contracted in the radial direction of the cylindrical tube and fixed at an arbitrary expansion / contraction position by using an expansion / contraction fixing device that fixes the positioning member in close proximity to the end face of the cylindrical tube. A contact portion that can maintain a perpendicularity to the cylindrical axis in a short time can be formed, and welding positioning of the flange that can be welded at a right angle to the cylindrical tube can be realized.

また、位置決め部材は、円筒管の端縁に等角度に複数個配置されるように設けられ、装着機構は、位置決め部材に接続されて複数個の位置決め部材を円筒管の半径方向に同時に拡大縮小自在に支持する拡大縮小装置と、拡大縮小装置に接続されて円筒管外からの操作で位置決め部材の内壁当接部を円筒管の内壁に押し当て状に当接させる操作部と、を含む構成であるから、位置決め部材の円筒管端縁への装着をより簡単かつ短時間に行うことができる。 In addition, a plurality of positioning members are arranged at equal angles on the edge of the cylindrical tube, and the mounting mechanism is connected to the positioning member to simultaneously expand and reduce the plurality of positioning members in the radial direction of the cylindrical tube. An enlargement / reduction device that is freely supported, and an operation unit that is connected to the enlargement / reduction device and that abuts the inner wall contact portion of the positioning member against the inner wall of the cylindrical tube by operation from outside the cylindrical tube. Therefore, the positioning member can be attached to the end of the cylindrical tube more easily and in a short time.

また、拡大縮小装置は、３個の位置決め部材を支持しつつ相互に連係して円筒管の管孔に挿入しやすいように可変保形させる複数のリンク部材と付勢部材とを有する構成とすることにより、位置決め部材の円筒管端縁への装着時にリンク部材同士のリンク角がランダムな折角を形成することなく、付勢部材の付勢力とリンク機構によりある程度の保形と、その変形容易性により装着をしやすくし、かつ、内壁当接部の正しい当接状態を得る作業を簡単、迅速に行うことが可能である。 Further, the enlargement / reduction device includes a plurality of link members and biasing members that support the three positioning members and are variably held so as to be easily inserted into the tube hole of the cylindrical tube while being linked to each other. Therefore, when the positioning member is attached to the end of the cylindrical tube, the link angle between the link members does not form a random folding angle, and the shape is maintained to some extent by the biasing force of the biasing member and the link mechanism, and its deformability Therefore, it is possible to easily and quickly perform the operation of making the mounting easy and obtaining the correct contact state of the inner wall contact portion.

また、位置決め部材は、円筒管の端縁に等角度に３個配置されるように設けられ、装着機構は、等角度に３個配置される３個の位置決め部材をそれぞれ支持する支持杆と、半径方向となる等角度三方向に向けて各支持杆を伸縮移動させる伸縮移動装置と、を有する構成とすることにより、簡単な構成により、短時間で円筒軸との直角度を保持し得る姿勢で
位置決め部材を円筒管端縁へ装着し得る。 Further, the positioning members are provided so as to be arranged at three equal angles on the edge of the cylindrical tube, and the mounting mechanism includes support rods that respectively support the three positioning members arranged at equal angles, An attitude that can maintain the perpendicularity to the cylindrical axis in a short time with a simple configuration by having a configuration that includes an expansion and contraction moving device that expands and contracts each support rod in three equal angular directions that are radial directions The positioning member can be attached to the end of the cylindrical tube.

本発明のフランジの溶接位置決め装置を用いて円筒管の端部に正しくフランジを溶接してフランジ継手を形成させた状態を示す一部省略斜視説明図である。It is a partially-omission perspective explanatory drawing which shows the state which welded the flange correctly to the edge part of a cylindrical pipe | tube using the welding positioning apparatus of the present invention, and formed the flange joint. 本発明の第１実施形態に係るフランジの溶接位置決め装置を一部図示省略の円筒管に装着した状態の拡大断面説明図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged cross-sectional explanatory view of a state in which a flange welding positioning device according to a first embodiment of the present invention is partially attached to a cylindrical tube not shown. 図２において円筒管の端面を正面から見た装置の正面説明図である。It is front explanatory drawing of the apparatus which looked at the end surface of the cylindrical tube from the front in FIG. 図２のフランジの溶接位置決め装置の要部の作用説明図である。It is effect | action explanatory drawing of the principal part of the welding positioning apparatus of the flange of FIG. （ａ）は、本発明の第２実施形態に係るフランジの溶接位置決め装置の一部省略要部拡大断面説明図、（ｂ）は、（ａ）のフランジの溶接位置決め装置の作用説明図である。(A) is a partially omitted principal part expanded sectional explanatory drawing of the welding positioning apparatus of the flange which concerns on 2nd Embodiment of this invention, (b) is an effect | action explanatory drawing of the welding positioning apparatus of the flange of (a). . 図５において円筒管の端面を正面から見た装置の正面説明図である。It is front explanatory drawing of the apparatus which looked at the end surface of the cylindrical tube from the front in FIG. 本発明の第３実施形態に係るフランジの溶接位置決め装置の円筒管の端面を正面から見た装置の正面説明図である。It is front explanatory drawing of the apparatus which looked at the end surface of the cylindrical tube of the welding positioning apparatus of the flange which concerns on 3rd Embodiment of this invention from the front. 本発明の第４実施形態に係るフランジの溶接位置決め装置の円筒管への装着状態での側面図である。It is a side view in the mounting state to the cylindrical pipe | tube of the welding positioning apparatus of the flange which concerns on 4th Embodiment of this invention. 図８のフランジの溶接位置決め装置の円筒管の端面を正面側から見た装置の正面説明図である。It is front explanatory drawing of the apparatus which looked at the end surface of the cylindrical tube of the welding positioning apparatus of the flange of FIG. 8 from the front side. 図８のフランジの溶接位置決め装置の移動管及び付勢部材の図示を省略した全体斜視説明図である。It is the whole perspective explanatory view which abbreviate | omitted illustration of the moving pipe and biasing member of the welding positioning apparatus of the flange of FIG. 図８のフランジの溶接位置決め装置の作用説明図である。It is action | operation explanatory drawing of the welding positioning apparatus of the flange of FIG. 図８のフランジの溶接位置決め装置の一部省略要部拡大断面図である。FIG. 9 is an enlarged cross-sectional view of a portion of the flange welding positioning apparatus of FIG. 図８のフランジの溶接位置決め装置の移動管及び付勢部材も含めて示した全体斜視説明図である。It is the whole perspective explanatory drawing shown also including the movement pipe and biasing member of the welding positioning apparatus of the flange of FIG. 図１３のフランジの溶接位置決め装置の作用説明図である。It is action | operation explanatory drawing of the welding positioning apparatus of the flange of FIG. 図８のフランジの溶接位置決め装置の円筒管への装着状態での縦断面作用説明図である。It is a longitudinal cross-section effect | action explanatory drawing in the mounting state to the cylindrical tube of the welding positioning apparatus of the flange of FIG. 図８のフランジの溶接位置決め装置の円筒管への装着状態での縦断面作用説明図である。It is a longitudinal cross-section effect | action explanatory drawing in the mounting state to the cylindrical tube of the welding positioning apparatus of the flange of FIG. 図８の変形実施態様に係るフランジの溶接位置決め装置の円筒管の端面を正面側から見た装置の正面説明図である。It is front explanatory drawing of the apparatus which looked at the end surface of the cylindrical tube of the welding positioning apparatus of the flange which concerns on the deformation | transformation embodiment of FIG. 8 from the front side. 図８の他の変形実施態様に係るフランジの溶接位置決め装置の円筒管の端面を正面側から見た装置の正面説明図である。It is front explanatory drawing of the apparatus which looked at the end surface of the cylindrical tube of the welding positioning apparatus of the flange which concerns on the other deformation | transformation embodiment of FIG. 8 from the front side. 従来の変形ゲージの使用状態を示す一部省略側面説明図である。It is a partially-omission side surface explanatory view which shows the use condition of the conventional deformation gauge. 図１９の変形ゲージを用いたフランジの溶接位置決め作業の斜視説明図である。It is a perspective explanatory view of the welding positioning operation of the flange using the deformation gauge of FIG.

以下、図面を参照して本発明を実施するための形態を説明する。図１は、本発明に係るフランジの溶接位置決め装置を用いて金属パイプとしての円筒管２の端部に正しくフランジを溶接してフランジ継手３を形成させた状態を示す一部省略斜視説明図であり、円筒管２の円筒軸線ＣＬにフランジ面４ａが直角あるいは直交するように正しくフランジ４が円筒管の端部に溶接固定される。すなわち、本発明のフランジの溶接位置決め装置は、円筒管の端縁の外周部分に溶接固定されるドーナツ状のフランジの該円筒管との溶接位置を決める装置である。ここで、フランジは中央にフランジ孔を有するドーナツ円盤形状であり、円盤本体には、ボルト等を挿通して他のフランジ等と固定するための締結具用孔が複数個周方向に等間隔で設けられている。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a partially omitted perspective explanatory view showing a state in which a flange joint 3 is formed by correctly welding a flange to an end portion of a cylindrical pipe 2 as a metal pipe using a flange positioning apparatus according to the present invention. The flange 4 is correctly welded and fixed to the end of the cylindrical tube so that the flange surface 4a is perpendicular or orthogonal to the cylindrical axis CL of the cylindrical tube 2. In other words, the flange welding positioning device of the present invention is a device that determines the welding position of a donut-shaped flange that is welded and fixed to the outer peripheral portion of the end of the cylindrical tube. Here, the flange has a donut disk shape having a flange hole in the center, and the disk body has a plurality of fastener holes through which bolts are inserted and fixed at other intervals in the circumferential direction. Is provided.

図２ないし図４は本発明のフランジの溶接位置決め装置１の第１の実施形態を示しており、図において、フランジの溶接位置決め装置１は、複数の位置決め部材５と、装着機構６と、を含む。位置決め部材５は、円筒管２の端縁の外周複数位置にフランジ４のフランジ面４ａに当たる当たり部７を形成させフランジ４の当たり位置で溶接するフランジの溶接位置決め手段であり、本実施形態において、フランジ４の位置決めは、予め円筒管にフランジ４の中央フランジ孔を貫通させ、その状態で位置決め部材５を円筒管の端面近傍に装着し、その後、フランジ４を円筒管端縁方向に移動させて円筒管２の外周複数位置に形成された当たり部７に当てたその当たり位置を溶接位置とするものである。 2 to 4 show a first embodiment of a flange welding positioning apparatus 1 according to the present invention. In the figure, the flange welding positioning apparatus 1 includes a plurality of positioning members 5 and a mounting mechanism 6. Including. The positioning member 5 is a flange positioning means for forming a contact portion 7 that contacts the flange surface 4a of the flange 4 at a plurality of positions on the outer periphery of the end of the cylindrical tube 2 and welding at the contact position of the flange 4, and in this embodiment, The positioning of the flange 4 is performed by passing the central flange hole of the flange 4 through the cylindrical tube in advance and mounting the positioning member 5 in the vicinity of the end surface of the cylindrical tube in that state, and then moving the flange 4 toward the end of the cylindrical tube. The contact positions applied to the contact portions 7 formed at a plurality of positions on the outer periphery of the cylindrical tube 2 are set as welding positions.

図２、３において、位置決め部材５は、円筒管２の直径位置に２個装着されている。実施形態において、位置決め部材５は、側面視Ｌ字状のＬ字体部材から成り、Ｌ字体の隅部が円筒管２の端縁の円筒管の孔と円筒管端面との角部に当接し、その状態でＬ字体の一方脚が円筒管２の内壁に沿って当接する直状部を有し、Ｌ字体の他方脚が円筒管の外周半径方向に円筒管から鍔状に拡大突設して形成されたＬ字杆部材から構成されている。内壁当接部１０と外周突設部１２とは直角に接続されている。すなわち、実施形態において、位置決め部材５は、円筒管２の軸線ＣＬ方向で円筒管２の内壁２ａに沿って当接配置される内壁当接部１０と内壁当接部１０と直角状に接続してＬ字体を成す外周突設部１２とを含む。そして、Ｌ字体の隅部が円筒管２の端縁に直角状に係合する。実施形態において、Ｌ字体は、角形あるいは丸形の棒材あるいはパイプをＬ字に一体形成して設けられているが、内壁当接部１０及び外周突設部１２を形成しておれば、その全体形状は任意に設定してよい。なお、内壁当接部１０と外周突設部１２は一体に形成しても、一体でなく別体部材を組み付けて形成することもできる。 2 and 3, two positioning members 5 are attached to the diameter position of the cylindrical tube 2. In the embodiment, the positioning member 5 is composed of an L-shaped member having an L-shape when viewed from the side, and a corner portion of the L-shaped body abuts on a corner portion between the hole of the cylindrical tube at the end of the cylindrical tube 2 and the end surface of the cylindrical tube, In this state, one leg of the L-shaped body has a straight portion that abuts along the inner wall of the cylindrical tube 2, and the other leg of the L-shaped body protrudes from the cylindrical tube in a bowl shape in the outer peripheral radial direction of the cylindrical tube. It is comprised from the formed L-shaped collar member. The inner wall contact portion 10 and the outer peripheral protruding portion 12 are connected at a right angle. That is, in the embodiment, the positioning member 5 is connected to the inner wall abutting portion 10 and the inner wall abutting portion 10 that are arranged in abutment along the inner wall 2 a of the cylindrical tube 2 in the direction of the axis CL of the cylindrical tube 2. And an outer peripheral projecting portion 12 forming an L shape. The corners of the L-shaped body engage with the end edges of the cylindrical tube 2 at right angles. In the embodiment, the L-shaped body is provided by integrally forming a square or round bar or pipe into the L-shape, but if the inner wall abutting portion 10 and the outer peripheral protruding portion 12 are formed, The overall shape may be set arbitrarily. In addition, even if the inner wall contact part 10 and the outer peripheral protrusion part 12 are formed integrally, they can be formed not by being integrated but by assembling separate members.

その際、円筒管２の内壁２ａに沿って当接配置される内壁当接部１０の内壁との当たり部分は軸方向にある程度の長さを有し、さらにその当たり部分の幅は狭いほうが好ましい。直径方向２点の当たり位置をできるだけ正確に設定する必要があるからである。また、位置決め部材の材質は、金属製が好ましいが、位置決め部材による位置決め後、該位置決め部材をフランジ管から離脱させた状態で溶接を行う場合には、合成樹脂で製造することもできる。 At that time, the contact portion with the inner wall of the inner wall abutting portion 10 disposed in contact with the inner wall 2a of the cylindrical tube 2 has a certain length in the axial direction, and the width of the contact portion is preferably narrower. . This is because it is necessary to set the contact positions of the two points in the diameter direction as accurately as possible. The material of the positioning member is preferably made of metal. However, after the positioning by the positioning member, when welding is performed in a state where the positioning member is detached from the flange tube, the positioning member can be made of synthetic resin.

外周突設部１２は、当たり部７と段差部１４と、を含む。外周突設部１２は円筒管の内壁にその長手方向を円筒軸方向に沿うように当接させた内壁当接部１０から直角方向に円筒管の外周半径方向に向けて突設した角形棒状部材で形成されており、これによってＬ字体の隅部を確実に円筒管の端縁に係合して円筒管から直角鍔状に外周突設部１２が突出するようにＬ字体が装着配置される。外周突設部１２の装着裏面側であるフランジ４との対向部分は長板面部が形成されており、この長板面部が当たり部７とされる。外周突設部１２の装着裏面側の長板面部は、円筒管２の端面２ｆと平行な１つの面８に含まれる部分であり、実施形態では長板面部分がフランジ４のフランジ面４ａと当接し円筒管に対するフランジの溶接位置を決める。なお、当たり部７は、実施形態のように長板面である必要はなく、任意の当たり面形状、線状あるいは点状の当たり部としてもよい。ここで、円筒管の端面は、円筒管の円筒軸線ＣＬに直角な面上に形成される円筒管の端面である。 The outer peripheral protruding portion 12 includes a contact portion 7 and a step portion 14. The outer peripheral projecting portion 12 is a rectangular bar-shaped member projecting from the inner wall abutting portion 10 which is in contact with the inner wall of the cylindrical tube so that its longitudinal direction is along the cylindrical axis direction, in a direction perpendicular to the outer peripheral radial direction of the cylindrical tube. Thus, the L-shaped body is mounted and disposed such that the corner of the L-shaped body is securely engaged with the edge of the cylindrical tube, and the outer peripheral projecting portion 12 projects from the cylindrical tube in a right-angled manner. . A long plate surface portion is formed at a portion facing the flange 4 on the mounting back surface side of the outer peripheral protruding portion 12, and this long plate surface portion is a contact portion 7. The long plate surface portion on the mounting back surface side of the outer peripheral protruding portion 12 is a portion included in one surface 8 parallel to the end surface 2 f of the cylindrical tube 2. In the embodiment, the long plate surface portion is the flange surface 4 a of the flange 4. Abutting and determining the welding position of the flange to the cylindrical tube. In addition, the contact part 7 does not need to be a long plate surface like embodiment, and is good also as arbitrary contact surface shape, a linear form, or a point-like contact part. Here, the end surface of the cylindrical tube is an end surface of the cylindrical tube formed on a surface perpendicular to the cylindrical axis CL of the cylindrical tube.

段差部１４は、フランジ４のフランジ面４ａを当たり部７に当接させて円筒管２の先端をフランジ面からフランジの厚み内部側に後退させた位置に位置を決める手段であり、実施形態において、Ｌ字体の隅部において、外周突設部１２の長板面部の下部から小さな段差を形成して内壁当接部１０に接続する部分に設けられている。すなわち、実施形態において、段差部１４は、円筒管２の端面２ｆと平行な面８に含まれる当たり部７から段差を形成し、円筒管２の軸線ＣＬに沿って円筒管の端縁から離隔する方向ｘ１に突設されて形成される。段差部１４は、当たり部７の下部から水平方向に突出する段差面１４ａと段差面の先端から鉛直下方に垂下する差部１４ｂとを含み、差部１４ｂの下端からさらに水平方向に内壁当接部１０が延設されて構成されている。 The step portion 14 is a means for determining the position at a position where the flange surface 4a of the flange 4 is brought into contact with the contact portion 7 and the tip of the cylindrical tube 2 is retracted from the flange surface to the inside of the thickness of the flange. At the corner of the L-shaped body, a small step is formed from the lower part of the long plate surface portion of the outer peripheral projecting portion 12 to be connected to the inner wall contact portion 10. That is, in the embodiment, the stepped portion 14 forms a step from the contact portion 7 included in the surface 8 parallel to the end surface 2 f of the cylindrical tube 2, and is separated from the edge of the cylindrical tube along the axis CL of the cylindrical tube 2. And projecting in the direction x1. The step portion 14 includes a step surface 14a that protrudes in the horizontal direction from the lower portion of the contact portion 7 and a difference portion 14b that hangs vertically downward from the tip of the step surface, and further contacts the inner wall in the horizontal direction from the lower end of the difference portion 14b. The part 10 is extended and configured.

これによって、２個の位置決め部材５が円筒管の直径端縁位置に配置されると、それぞれの外周突設部１２の裏面側に円筒管の端面と平行な面８に含まれる当たり部７が形成され、これにフランジのフランジ面４ａを当接するだけで、円筒管の端面からフランジの厚み内部側に後退させた位置であって、円筒管の軸線と直角度を正しく設定した管の外周位置にフランジを配置させて位置決めすることができ、この状態のまま、あるいは本位置決め装置１を円筒管から離脱させた状態で、仮付け溶接、さらにそれに続く本付け溶接を簡単かつ円滑に実行することができる。 Thus, when the two positioning members 5 are arranged at the diameter edge positions of the cylindrical tubes, the contact portions 7 included in the surfaces 8 parallel to the end surfaces of the cylindrical tubes are formed on the back surfaces of the respective outer peripheral protruding portions 12. The outer peripheral position of the pipe which is formed and is set to be retracted from the end face of the cylindrical pipe to the inner thickness side of the flange simply by contacting the flange face 4a of the flange, and the axis and perpendicularity of the cylindrical pipe are correctly set. In this state or with the positioning device 1 detached from the cylindrical tube, the tack welding and the subsequent main welding can be performed easily and smoothly. Can do.

装着機構６は、複数の位置決め部材５を円筒管２の等角度位置に押し付け離開自在に装着する円筒管への位置決め部材の装着手段であり、特に、円筒管の円周方向等角度位置に位置決め部材を押し付けて装着させる。本実施形態において、上述の通り、円筒管２の直径方向に２個、円筒管の円周の１８０度離隔位置において位置決め部材５が装着されている。本実施形態において、具体的には、装着機構６は、円筒管の直径方向に伸縮自在に係合し、任意の伸縮位置で固定する２個の支持桿１６を含む伸縮固定装置１８から構成されている。２個の支持桿１６Ａ，１６Ｂはそれぞれ先端側にＬ字体からなる位置決め部材５を内壁当接部のＬ字体脚杆が円筒管の軸方向に沿うように配置され、さらに外周突設部のＬ字体脚杆が円筒管の端縁からＬ字直角方向に外方向に向けて延びる状態で固定させている。２個の支持桿１６はそれぞれ断面の１辺大きさが異なる角パイプ材で構成されており、それぞれの基部の一方が他方の角パイプ部材に嵌挿されて伸縮自在に係合し、任意の係合位置でビス２０により押し付け固定されるようになっている。支持桿１６を縮長した状態で装置１を円筒管２に対して着脱操作し、円筒管２の端面近傍に装置１を配置させた状態で支持桿１６を伸長させることにより位置決め部材５の内壁当接部１０を円筒管の内壁に当接させて、円筒管円周の等角度位置を決めて固定させることで、位置決め部材５の直角部分の隅部を円筒管の端縁に正しく係合させた状態で仮固定させることができる。 The mounting mechanism 6 is a means for mounting a positioning member on the cylindrical tube that presses a plurality of positioning members 5 against the equiangular position of the cylindrical tube 2 so as to be releasably mounted. The member is pressed and attached. In the present embodiment, as described above, two positioning members 5 are mounted in the diameter direction of the cylindrical tube 2 at positions 180 degrees apart from the circumference of the cylindrical tube. In the present embodiment, specifically, the mounting mechanism 6 is configured by an expansion / contraction fixing device 18 including two support rods 16 that are elastically engaged in the diameter direction of the cylindrical tube and fixed at an arbitrary expansion / contraction position. ing. The two support rods 16A and 16B are each provided with an L-shaped positioning member 5 on the tip side so that the L-shaped leg rod of the inner wall abutting portion extends along the axial direction of the cylindrical tube, and further, the L of the outer peripheral projecting portion L The character leg is fixed in a state of extending outward from the edge of the cylindrical tube in a direction perpendicular to the L-shape. Each of the two support rods 16 is formed of a square pipe material having a cross-sectional one side size different from each other, and one of the respective base portions is inserted into the other square pipe member to be engaged with each other in an expandable manner. The screw 20 is pressed and fixed at the engagement position. The apparatus 1 is attached to and detached from the cylindrical tube 2 in a state where the support rod 16 is contracted, and the support rod 16 is extended in a state where the device 1 is disposed in the vicinity of the end surface of the cylindrical tube 2 to thereby increase the inner wall of the positioning member 5. By abutting the abutting portion 10 against the inner wall of the cylindrical tube and determining and fixing the equiangular position of the circumference of the cylindrical tube, the corner of the right angle portion of the positioning member 5 is correctly engaged with the edge of the cylindrical tube. It can be temporarily fixed in the state of being made to.

次に第１実施形態の作用について、説明すると、まず、フランジ溶接させるパイプ材としての円筒管を水平状に配置して架台に安定して載置させる。円筒管は、例えば４ｍｍ（ミリメートル）厚×２２ｃｍ（センチメートル）直径×４ｍ（メートル）長で、重量物でありＶ字状受台等による安定載置状態で静止する。この状態で、２ｃｍ厚×３２ｃｍ外径直径程度のフランジ４の孔を円筒管の端部から貫通させて配置させる。この状態で、フランジの溶接位置決め装置１の装着機構６の支持桿１６を縮長させて円筒管の端縁側から円筒管の中空内に挿入させある程度の挿入位置で支持桿１６を伸長させる。直径方向両側の位置決め部材５の内壁当接部１０が円筒管の内壁に正しく当たった状態でビス２０を回動させて押し付け固定させる。ビス２０の固定は、内壁当接部１０の脚杆が円筒管の内壁の管軸方向に沿って当たり、さらに円筒管の端面がＬ字体の隅部に密着配置され円筒管の端縁から外周突設部１２が管軸と直角方向に外周に突設した状態で正しく当たったと判断される。このとき、内壁当接部１０の円筒管内壁への当接とともに、段差部１４の差部１４ｂの壁面に円筒管２の端面も当接させ、これを確認する（図４参照）。すると、段差部の段差面１４ａと円筒管の外周面が面一となり、この状態でフランジ４を円筒管２の先端方向ｘ２に移動して位置決め部材５の当たり部７に当接させる。円筒管の直径位置の２つの位置決め部材５の当たり部７にフランジ４が同時に当接した状態で、円筒管の端面と平行で円筒管軸と直交する面（８）がフランジの衝合面となる円筒管との直角位置を設定し、この状態で、例えば円筒管の任意の直径方向の対向２点を含む複数点ｄ１、ｄ２・・・を仮付けし、必要に応じて装置１を例えば９０度回転位置で当たり部７との当たりを確認して他の部分の仮付けを行い、続いて本付け溶接を行うものである。なお、フランジのフランジ面４ａと円筒管の端面とが段差状にずれた状態で位置決めされ、この段差凹部の角の接合部分に向けて溶接を施すことにより例えばフランジ同士の突合せ時に両フランジ面の密着状態で接続し、良好な配管接続を行うことができる。 Next, the operation of the first embodiment will be described. First, a cylindrical tube as a pipe material to be flange-welded is horizontally arranged and stably placed on a gantry. The cylindrical tube is, for example, 4 mm (millimeters) thick × 22 cm (centimeters) diameter × 4 m (meters) long, is a heavy object, and is stationary in a stable placement state by a V-shaped cradle or the like. In this state, the hole of the flange 4 having a diameter of about 2 cm × 32 cm of the outer diameter is disposed through the end of the cylindrical tube. In this state, the support rod 16 of the mounting mechanism 6 of the flange welding positioning device 1 is lengthened and inserted into the hollow of the cylindrical tube from the end edge side of the cylindrical tube, and the support rod 16 is extended at a certain insertion position. The screw 20 is rotated and pressed and fixed in a state where the inner wall contact portions 10 of the positioning members 5 on both sides in the diameter direction are correctly in contact with the inner wall of the cylindrical tube. Fixing of the screw 20 is such that the leg of the inner wall abutting portion 10 hits along the tube axis direction of the inner wall of the cylindrical tube, and the end surface of the cylindrical tube is arranged in close contact with the corner of the L-shaped body. It is determined that the projecting portion 12 is correctly hit in a state of projecting from the outer periphery in a direction perpendicular to the tube axis. At this time, the end surface of the cylindrical tube 2 is also brought into contact with the wall surface of the difference portion 14b of the stepped portion 14 together with the contact of the inner wall contacting portion 10 with the inner wall of the cylindrical tube, and this is confirmed (see FIG. 4). Then, the stepped surface 14a of the stepped portion and the outer peripheral surface of the cylindrical tube are flush with each other, and in this state, the flange 4 is moved in the distal direction x2 of the cylindrical tube 2 and brought into contact with the contact portion 7 of the positioning member 5. In a state where the flange 4 is simultaneously in contact with the contact portions 7 of the two positioning members 5 at the diameter position of the cylindrical tube, a surface (8) parallel to the end surface of the cylindrical tube and perpendicular to the cylindrical tube axis is an abutting surface of the flange. In this state, for example, a plurality of points d1, d2,... Including two diametrically opposed points of the cylindrical tube are temporarily attached. The contact with the contact portion 7 is confirmed at a 90-degree rotation position, and other portions are temporarily attached, followed by permanent welding. In addition, the flange surface 4a of the flange and the end surface of the cylindrical tube are positioned in a state where they are shifted in a stepped manner, and welding is performed toward the joint portion at the corner of the stepped recess, for example, when the flange surfaces are brought together. It can be connected in close contact, and good pipe connection can be made.

次に、本発明の第２実施形態について、図５，６を参照して説明するが、第１実施形態と同一部材には同一符号を付し、その詳細な説明は省略する。第２実施形態のフランジの溶接位置決め装置１−２では、位置決め部材５の当たり部７と段差部１４１を含む外周突設部１２１が内壁当接部１０１と別体で構成されて外周突設部１２１が円筒管の外周半径方向に進退自在に移動可能となっている点のみが第１実施形態と相違し、それ以外の部分は第１実施形態と同一の構成である。すなわち、第２実施形態のフランジの溶接位置決め装置１−２では、図５（ａ）に示すように、円筒管の外周半径方向に延びるＬ字体の脚杆は当たり部７を含む外方脚杆と外方脚杆の下端から内壁当接部の水平脚杆の長手方向に沿う方向に突設する段差部１４１を含む小Ｌ字体部材から構成され、当たり部７と段差部１４１を含む小Ｌ字体部材の外周突設部１２１が内壁当接部１０１から円筒管の半径外方向（ｙ１）に向けて近接離開自在に移動可能とされている（図５（ｂ）参照）。詳細には、内壁当接部１０１の端部寄り位置に内壁当接部の脚杆長手と直角方向にガイドピン２２が立設固定されており、このガイドピン２２が小Ｌ字体部材の外周突設部１２１の下端に設けた縦穴２４に摺動自在に嵌合している。そして、内壁当接部１０１からの任意の直角方向離隔移動位置において外周突設部１２１が支持桿１６の伸縮固定装置と同様にビス２６により押し付け固定される。これによって、円筒管２の任意の厚さに対応して厚さ対応調整を行い、これによって円筒管の外周面と位置決め部材の段差面１４１ａとを面一に合わせ（図５（ｂ））、この状態で、予め挿通させておいたフランジ４を円筒管の先端方向に単に移動して当たり部７に当ててすべての他の位置決め部材の当たり部７での当たり状態を確認するだけで、それ以後は、第１実施形態と同様の方法により位置決めし、仮溶接、さらには本付け溶接を行うこととなる。厚み調整位置決め機構２７は、ここで内壁当接部１０１のガイドピン２２と、外周突設部１２１の縦穴２４と、ビス２６を含み、段差部１４１上面と円筒管２外面が断面で面一となる所要の移動位置で固定して、円筒管の厚みの違いによる外周位置と面一の段差面を容易に形成して１つの装置１により種々の規格の円筒管についてのフランジ溶接の位置決めを行える様にし得る。 Next, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6. However, the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. In the flange welding positioning device 1-2 of the second embodiment, the outer peripheral protruding portion 121 including the contact portion 7 of the positioning member 5 and the stepped portion 141 is configured separately from the inner wall abutting portion 101, and the outer peripheral protruding portion. Only the point 121 is movable in the outer peripheral radius direction of the cylindrical tube so as to be able to move forward and backward is different from the first embodiment, and other parts are the same as those in the first embodiment. That is, in the flange welding positioning device 1-2 of the second embodiment, as shown in FIG. 5A, the L-shaped leg rod extending in the outer peripheral radial direction of the cylindrical tube is an outer leg rod including the contact portion 7. And a small L-shaped member including a step portion 141 projecting in a direction along the longitudinal direction of the horizontal leg of the inner wall contact portion from the lower end of the outer leg rod, and a small L including the contact portion 7 and the step portion 141. The outer peripheral protruding portion 121 of the font member is movable from the inner wall abutting portion 101 toward and away from the radial direction (y1) of the cylindrical tube (see FIG. 5B). Specifically, a guide pin 22 is erected and fixed at a position near the end of the inner wall abutting portion 101 in a direction perpendicular to the length of the leg of the inner wall abutting portion, and the guide pin 22 is protruded from the outer periphery of the small L-shaped member. It is slidably fitted in a vertical hole 24 provided at the lower end of the installation part 121. Then, the outer peripheral projecting portion 121 is pressed and fixed by the screw 26 in the same manner as the expansion / contraction fixing device of the support rod 16 at an arbitrary perpendicularly moving position from the inner wall contact portion 101. Thereby, the thickness correspondence adjustment is performed corresponding to the arbitrary thickness of the cylindrical tube 2, and thereby the outer peripheral surface of the cylindrical tube and the stepped surface 141a of the positioning member are flush with each other (FIG. 5B). In this state, the flange 4 that has been inserted in advance is simply moved in the direction of the tip of the cylindrical tube and applied to the contact portion 7 to check the contact state at the contact portion 7 of all other positioning members. Thereafter, positioning is performed by the same method as in the first embodiment, and temporary welding and then permanent welding are performed. The thickness adjustment positioning mechanism 27 includes a guide pin 22 of the inner wall contact portion 101, a vertical hole 24 of the outer peripheral protruding portion 121, and a screw 26, and the upper surface of the stepped portion 141 and the outer surface of the cylindrical tube 2 are flush with each other in cross section. It is fixed at the required moving position, and the stepped surface which is flush with the outer peripheral position due to the difference in thickness of the cylindrical tube can be easily formed, and the positioning of the flange welding for the cylindrical tube of various standards can be performed by one device 1. You can do it.

次に、本発明の第３実施形態について、図７を参照して説明するが、第１実施形態と同一部材には同一符号を付し、その詳細な説明は省略する。第３実施形態のフランジの溶接位置決め装置１−３では、位置決め部材は、円筒管の端縁に等角度に３個配置されるように設けられ、装着機構６は、等角度に３個配置される３個の位置決め部材５１，５２，５３をそれぞれ支持する支持杆２８Ａ、２８Ｂ、２８Ｃと、半径方向となる等角度三方向に向けて各支持杆を伸縮移動させる伸縮移動装置３０とを備えている。位置決め部材の外周突設部１２、内壁当接部１０並びに段差部１４を隅部に有するＬ字体構成は第１実施形態の構成と同様である。本実施形態では、伸縮移動装置３０は、基部が手裏剣状に一体化されて結合された器体３２と、円周１２０度位置で半径外方向に向けて器体３２から延びる３個の案内筒３１と、各案内筒３１に設けた円筒管２の半径方向に長い孔溝３８と、を含む。そして、各案内筒３１に３個の支持杆２８がそれぞれ摺動自在に係合して半径方向に伸縮移動する。各支持杆２８は各案内筒３１内に相互に長手方向に摺動自在に収容されている。そして、各案内筒３１に設けた孔溝３８を貫く固定部材３６がそれぞれ設けられており、これによって、止めねじが例えば図５のような押し付け力で支持杆２８の側部を押し付けることにより支持杆の任意の伸縮移動位置で固定するものである。固定部材３６としての止めねじは緩めた状態で支持杆は自由に案内筒に対して伸縮移動できる。孔溝３８の長手方向に沿って各案内筒３１には目盛が表示されており、これによって、各支持杆の伸縮位置を確認しできるだけ正確な溶接位置を迅速に決定させることができる。 Next, a third embodiment of the present invention will be described with reference to FIG. 7, but the same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. In the flange welding positioning device 1-3 of the third embodiment, three positioning members are provided at the same angle on the edge of the cylindrical tube, and three mounting mechanisms 6 are arranged at the same angle. Support rods 28A, 28B, and 28C that respectively support the three positioning members 51, 52, and 53, and an expansion and contraction movement device 30 that expands and contracts each of the support rods in three equal angular directions that are radial directions. Yes. The L-shaped configuration having the outer peripheral protruding portion 12 of the positioning member, the inner wall contact portion 10 and the stepped portion 14 at the corners is the same as the configuration of the first embodiment. In the present embodiment, the telescopic movement device 30 includes a container body 32 whose base portion is integrated and combined into a shuriken shape, and three guide cylinders extending from the container body 32 toward the radially outward direction at a position of 120 degrees in the circumference. 31 and a hole groove 38 that is long in the radial direction of the cylindrical tube 2 provided in each guide cylinder 31. Then, the three support rods 28 are slidably engaged with the respective guide cylinders 31 so as to expand and contract in the radial direction. Each support rod 28 is accommodated in each guide cylinder 31 so as to be slidable in the longitudinal direction. And the fixing member 36 which penetrates the hole groove 38 provided in each guide cylinder 31 is provided, respectively, and this supports a support screw 28 by pressing the side part of the support rod 28 with pressing force like FIG. It is fixed at any expansion / contraction movement position of the bag. The support rod can be freely expanded and contracted with respect to the guide tube while the set screw as the fixing member 36 is loosened. A scale is displayed on each guide tube 31 along the longitudinal direction of the hole groove 38, whereby the expansion / contraction position of each support rod can be confirmed and a welding position as accurate as possible can be quickly determined.

この第３実施形態のフランジの溶接位置決め装置１では、第１実施形態の図２の場合と同様に、各支持杆２８を案内筒３１内に縮めた状態で円筒管２の一部としての内壁当接部１０を筒孔の口縁から内部に挿入するように近接させ、この状態で、各支持杆２８を案内筒３１から伸長させてそれぞれの位置決め部材の内壁当接部と共に、３個の位置決め部材の段差部１４をそれぞれ円筒管２の先端に突き当てる状態に調整し、この状態で当たり部７に当てた位置で固定部材３６を締め付けて位置決め部材による直角度を保持した溶接位置で固定する。この後、第１実施形態の場合と同様に、仮溶接、本付け溶接を行うようになっている。この第３実施形態のフランジの溶接位置決め装置１−３においても、位置決め部材は内壁当接部と外周突設部を一体に形成して段差部１４でフランジ面から円筒管端面を後退させるようにしてもよいし、また、第２実施形態の図５のように、内壁当接部と外周突設部を分離して内壁当接部から段差部を含む外周突設部を半径方向に進退調整可能としてもよい。 In the flange welding positioning device 1 of the third embodiment, as in the case of FIG. 2 of the first embodiment, the inner wall as a part of the cylindrical tube 2 with each support rod 28 being contracted in the guide tube 31. The abutting portions 10 are brought close to each other so as to be inserted into the inside of the mouth of the tube hole, and in this state, each support rod 28 is extended from the guide tube 31, and the three inner wall abutting portions of the respective positioning members are combined. The step 14 of the positioning member is adjusted so as to abut against the tip of the cylindrical tube 2, and the fixing member 36 is tightened at the position where it hits the contact portion 7 in this state, and fixed at the welding position where the perpendicularity by the positioning member is maintained. To do. Thereafter, as in the case of the first embodiment, temporary welding and permanent welding are performed. Also in the flange welding positioning apparatus 1-3 according to the third embodiment, the positioning member integrally forms the inner wall abutting portion and the outer peripheral protruding portion, and the stepped portion 14 retreats the end surface of the cylindrical tube from the flange surface. Alternatively, as shown in FIG. 5 of the second embodiment, the inner wall abutting portion and the outer peripheral protruding portion are separated and the outer peripheral protruding portion including the stepped portion is adjusted to advance and retreat in the radial direction from the inner wall abutting portion. It may be possible.

次に、本発明の第４実施形態について、図８〜図１６を参照して説明するが、第１実施形態と同一部材には同一符号を付し、その詳細な説明は省略する。第４実施形態のフランジの溶接位置決め装置１−４では、第１実施形態の図２，４，５と同様の内壁当接部１０及び外周突設部１２を有するＬ字体構成で当たり部７と段差部１４を有する位置決め部材５の構成である点は第１実施形態と同様である。この第４実施形態のフランジの溶接位置決め装置では、複数の位置決め部材を支持する構造並びに円筒管の内壁側に内壁当接部１０を押し付け操作する構成を含む装着機構６が第１実施形態と異なる。すなわち、本実施形態の装着機構６は、拡大縮小装置６０と、操作部６２とを含む。本実施形態の位置決め部材５４１，５４２、５４３は３個設けられており、この３個の位置決め部材を拡大縮小装置６０により円筒管の半径方向に同時に拡大縮小自在に支持する。 Next, although 4th Embodiment of this invention is described with reference to FIGS. 8-16, the same code | symbol is attached | subjected to the same member as 1st Embodiment, and the detailed description is abbreviate | omitted. In the flange welding positioning device 1-4 according to the fourth embodiment, the contact portion 7 is formed in an L-shaped configuration having the inner wall contact portion 10 and the outer peripheral protrusion portion 12 similar to those in FIGS. The point which is the structure of the positioning member 5 which has the level | step-difference part 14 is the same as that of 1st Embodiment. The flange welding positioning apparatus according to the fourth embodiment differs from the first embodiment in a mounting mechanism 6 including a structure for supporting a plurality of positioning members and a structure for pressing the inner wall contact portion 10 against the inner wall side of the cylindrical tube. . That is, the mounting mechanism 6 of this embodiment includes an enlargement / reduction device 60 and an operation unit 62. In this embodiment, three positioning members 541, 542, and 543 are provided, and these three positioning members are supported by the enlarging / reducing device 60 so that they can be enlarged and reduced simultaneously in the radial direction of the cylindrical tube.

図９,１０,１３,１４において、拡大縮小装置６０は、位置決め部材に接続されて複数個の位置決め部材を円筒管の半径方向に同時に拡大縮小自在に支持する手段であり、実施形態において、円筒管２の軸方向に長いねじ軸６４と、ねじ軸の相互離隔位置において螺合され、ねじ軸のいずれかの回転方向について相互に近接又は離隔移動する２個のナット部材６６、６８と、ナット部材の同心軸回りの同一位相１２０度位置にそれぞれ３個設けられた軸支ブラケット６６Ａ、６６Ｂ、６６Ｃ、６８Ａ、６８Ｂ、６８Ｃと、一端が軸支ブラケット６６Ａ、６６Ｂ、６６Ｃに枢支され他端がＬ字体の内壁当接部１０の基端寄り位置に枢支されたリンク杆７０Ａ、７１Ａ、７２Ａ、一端が他のナット部材の軸支ブラケット６８Ａ、６８Ｂ、６８Ｃに枢支され他端がＬ字体の内壁当接部１０の先端側寄り位置に枢支されたリンク杆７０Ｂ、７１Ｂ、７２Ｂと、各位相のリンク杆とＬ字体の位置決め部材５４１，５４２，５４３とを任意のリンク折角で付勢保持する付勢部材７４（図１３，１４参照）と、を備えている。なお、図８，１０，１１，１５，１６は付勢部材及び移動管を破線枠で囲んでそれらの図示を省略している。実施形態において、２個のナット部材６６、６８の中間におけるねじ軸６４に移動管７６が遊挿されており、この移動管７６の外周１２０度位置に３個の係止リング７８が固定されている。この係止リング７８とそれぞれの位相に対応する一対のリンク杆、並びにこれらの対向するリンク杆同士を両端に接続して付勢ばね８０群が設けられている。付勢ばね群は、各位相の位置決め部材に対応する付勢部材としての付勢ばね８０ａ１、８０ａ２、８０ａ３、８０ｂ１、８０ｂ２、８０ｂ３、８０ｃ１、８０ｃ２、８０ｃ３を含み、各位相の位置決め部材についてリンク杆によるリンク角を付勢保持させる。また、移動管７６の両側のねじ軸外周部分にはコイルばね８２，８２が嵌挿され、移動管７６を常時２個のナット部材６６、６８の中央位置に位置させるようにばね付勢している。これによって、周方向１２０度離隔位置の３つの位相ごとに各位相で支持された３個の位置決め部材を円筒管の半径方向に同時に拡大縮小自在に支持するものである。複数のリンク杆７０、７２と付勢部材７４により、リンク節において各自にランダムに折れた状態となることなく、適度に円筒管２の半径方向に拡大してあるまとまった立体形状を保持することができるから、円筒管の口縁から内壁当接部１０を挿入させる際に（図１１参照）、装置全体が付勢部材により柔らかな緊張状態でラグビーボール状から四角錐体状に保形しつつ自在に形状を変化させることができる。このとき、１２０度位置の各内壁当接部は同時に拡大縮小できるから、円筒管の真円に正しく内壁当接部を当接し、段差部１４の段差面１４ａに円筒管の端面を当てた状態を設定できる。 9, 10, 13, and 14, the enlargement / reduction device 60 is a means that is connected to the positioning member and supports the plurality of positioning members simultaneously in the radial direction of the cylindrical tube so that the enlargement / reduction is possible. A screw shaft 64 that is long in the axial direction of the tube 2, two nut members 66 and 68 that are screwed together at mutually spaced positions of the screw shaft and move close to or away from each other in any rotational direction of the screw shaft; Three support brackets 66A, 66B, 66C, 68A, 68B, 68C provided at three positions with the same phase around the concentric axis of the member, and one end pivotally supported by the support brackets 66A, 66B, 66C. Are pivotally supported near the base end of the L-shaped inner wall abutting portion 10, and one end pivots to the pivot brackets 68A, 68B, 68C of the other nut members. The link rods 70B, 71B, 72B, the other ends of which are pivotally supported at positions closer to the front end side of the L-shaped inner wall contact portion 10, and the link rods of the respective phases and the L-shaped positioning members 541, 542, 543 are arbitrarily provided. And an urging member 74 (see FIGS. 13 and 14) for urging and holding at the link folding angle. 8, 10, 11, 15, and 16, the urging member and the moving tube are surrounded by a broken line frame, and illustration thereof is omitted. In the embodiment, the moving tube 76 is loosely inserted into the screw shaft 64 between the two nut members 66 and 68, and the three locking rings 78 are fixed to the position of the outer periphery 120 degrees of the moving tube 76. Yes. A pair of link rods corresponding to the locking ring 78 and the respective phases, and the opposing link rods are connected to both ends to provide a biasing spring 80 group. The urging spring group includes urging springs 80a1, 80a2, 80a3, 80b1, 80b2, 80b3, 80c1, 80c2, and 80c3 as urging members corresponding to the positioning members of the respective phases. Energize and hold the link angle. In addition, coil springs 82 and 82 are fitted and inserted into the outer peripheral portions of the screw shafts on both sides of the moving tube 76, and the moving tube 76 is urged by spring so that it is always positioned at the center position of the two nut members 66 and 68. Yes. As a result, the three positioning members supported at each of the three phases at the circumferentially spaced 120 degrees are supported at the same time in the radial direction of the cylindrical tube so as to be freely expandable / reducible. The plurality of link rods 70 and 72 and the urging member 74 maintain a solid shape that is appropriately expanded in the radial direction of the cylindrical tube 2 without being randomly folded at the link node. Therefore, when the inner wall abutting portion 10 is inserted from the edge of the cylindrical tube (see FIG. 11), the entire apparatus is held in a soft tension state from the rugby ball shape to the quadrangular pyramid shape by the biasing member. The shape can be changed freely. At this time, since the inner wall abutting portions at 120 degrees can be enlarged and reduced at the same time, the inner wall abutting portion correctly abuts on the perfect circle of the cylindrical tube, and the end surface of the cylindrical tube is in contact with the stepped surface 14a of the stepped portion 14 Can be set.

また、本実施形態では、図１２に示すように、位置決め部材５４１，５４２，５４３のＬ字体の隅部に設けられた段差部１４において、その段差面１４ａよりも外方向に向けて高い位置でフランジ４のフランジ孔壁に当接して受ける孔壁受け高さ調整装置９０が設けられている。実施形態において、孔壁受け高さ調整装置９０は、外周突設部または内壁当接部の基部となるＬ字体の隅部において、段差部１４を円筒管の半径外方向に向けて進退させる先端部を有するねじ体９２からなり、ねじ体９２の先端部の段差面１４ａからの突出高さ位置を変えることにより、ねじ体９２の先端部がフランジ孔壁に当たり、これによって、管軸直角の当たり面に位置する当たり部７を正しく確実に設定することができる。なお、本実施形態においては、図１２のように、ねじ体からなる孔壁受け高さ調整装置９０を設けることなく、第１実施形態のように、円筒管の管厚さに対応する段差部の段差長として孔壁受け高さ調整を不要とする構成としてもよい。また、第２実施形態の図５のように、内壁当接部と外周突設部を分離して内壁当接部から段差部を含む外周突設部を半径方向に進退調整可能としてもよい。 Moreover, in this embodiment, as shown in FIG. 12, in the level | step-difference part 14 provided in the corner | angular part of the L-shaped body of the positioning members 541, 542, and 543, it is higher in the outward direction than the level | step difference surface 14a. A hole wall receiving height adjusting device 90 is provided in contact with the flange hole wall of the flange 4. In the embodiment, the hole wall receiving height adjusting device 90 has a tip that advances and retracts the stepped portion 14 toward the radially outward direction of the cylindrical tube at the corner of the L-shaped body serving as the base of the outer peripheral protruding portion or the inner wall abutting portion. A screw body 92 having a threaded portion, and by changing the protruding height position of the tip end portion of the screw body 92 from the stepped surface 14a, the tip end portion of the screw body 92 hits the flange hole wall, thereby causing a contact perpendicular to the tube axis. The contact part 7 located on the surface can be set correctly and reliably. In this embodiment, as shown in FIG. 12, the stepped portion corresponding to the tube thickness of the cylindrical tube is provided as in the first embodiment without providing the hole wall receiving height adjusting device 90 made of a screw body. It is good also as a structure which does not require adjustment of a hole wall receiving height as the level | step difference of this. Further, as shown in FIG. 5 of the second embodiment, the inner wall abutting portion and the outer peripheral protruding portion may be separated so that the outer peripheral protruding portion including the stepped portion can be adjusted to advance and retreat in the radial direction from the inner wall abutting portion.

本実施形態において、操作部６２は、ねじ軸６４の一端側に取り付けた操作ハンドル８４で構成されており、操作ハンドル８４を回動すると、各位相の一対のリンク杆と位置決め部材５がジャッキ式に位置決め部材を拡大、縮小駆動させる。すなわち、操作ハンドルを介してねじ軸６４をいずれかの方向に回動させると、ねじ軸に螺合する２つのナット部材６６，６８は、ねじ軸に螺合してそれぞれが回転することなく、さらに周方向１２０度位置の位相を変化させることなく保持しながらねじ軸の長手方向のナット部材同士の離隔間隔を大小変化させる。例えばハンドルの右回転により２つのナット部材はねじ軸と螺合しつつねじ軸上を互いに近接移動し、このとき、リンク杆のリンク角を小さくし半径方向に立ち上げ、図１６に示すように、位置決め部材を半径伸長方向に変位させ、これによって、３つの位置決め部材は拡大方向に同時に移動し管端の３点に内壁当接部を当接させ得る。これによって、円筒管の管端の面が管軸と直交しておれば管軸に直交する外周突設部並びに当たり部７が得られることとなる。したがって、最終的には、操作ハンドルの締め込み回動により位置決め部材を円筒管内壁に圧接させ、その状態でフランジ４を管端方向に移動させて当たり部７に当接させるものである。なお、図１５は、円筒管の管径が小さい場合、図１６は、管径が大きい場合の拡大縮小装置によるねじ軸上のナット部材の位置とリンク杆の変位状態を示しており、いずれの場合も、内壁当接部及び外周突設部を含む位置決め部材がその段差部において正しく円筒管端に装着され、外周突設部による管軸直交部分としての当たり部７を設定した状態を示している。 In the present embodiment, the operation unit 62 includes an operation handle 84 attached to one end of the screw shaft 64. When the operation handle 84 is rotated, a pair of link rods and positioning members 5 of each phase are jack-type. The positioning member is enlarged and reduced. That is, when the screw shaft 64 is rotated in either direction via the operation handle, the two nut members 66 and 68 screwed to the screw shaft are screwed to the screw shaft without rotating each other. Further, the distance between the nut members in the longitudinal direction of the screw shaft is changed in size while being held without changing the phase at the position of 120 degrees in the circumferential direction. For example, by rotating the handle to the right, the two nut members are moved closer to each other on the screw shaft while being screwed with the screw shaft. At this time, the link angle of the link rod is reduced and raised in the radial direction, as shown in FIG. Then, the positioning member is displaced in the radial extension direction, whereby the three positioning members can be moved simultaneously in the enlargement direction and the inner wall contact portion can be brought into contact with the three points of the pipe end. Accordingly, if the surface of the tube end of the cylindrical tube is orthogonal to the tube axis, the outer peripheral projecting portion and the contact portion 7 orthogonal to the tube axis are obtained. Accordingly, the positioning member is finally brought into pressure contact with the inner wall of the cylindrical tube by tightening and rotating the operation handle, and in this state, the flange 4 is moved in the tube end direction and brought into contact with the contact portion 7. FIG. 15 shows the position of the nut member on the screw shaft and the displacement state of the link rod when the pipe diameter of the cylindrical pipe is small, and FIG. In this case, the positioning member including the inner wall abutting portion and the outer peripheral protruding portion is correctly attached to the end of the cylindrical tube at the stepped portion, and the contact portion 7 as the tube axis orthogonal portion by the outer peripheral protruding portion is set. Yes.

第４実施形態では、装置１−４を把持してねじ軸の一端側を若干挿入し、ハンドル８４を回動操作して位置決め部材を半径方向に拡大方向移動させつつ位置決め部材の段差部の段差面１４ａを円筒管端面に正しく当たるように操作する。このとき、周方向１２０度離隔位置でそれぞれ同時に半径方向に位置決め部材は向かうから内壁当接部１０が正しく円筒管の内壁に当接すると外周突設部１２の当たり部７は、円筒管２に対して直角度を有する面上の部位として設定され、この状態で操作部６２を操作して装置を円筒管端縁部分に固定し、この状態で予め円筒管に挿入していたフランジ４を管端方向に戻し移動させて、正しい溶接位置を設定することとなる。位置設定状態で、仮付けさらに本付け溶接を行ってフランジを円筒管に接合させる。 In the fourth embodiment, the device 1-4 is grasped and one end side of the screw shaft is slightly inserted, and the handle 84 is turned to move the positioning member in the radial direction in the enlargement direction. The surface 14a is operated so as to correctly contact the end surface of the cylindrical tube. At this time, since the positioning members are simultaneously directed in the radial direction at 120 degrees apart from each other in the circumferential direction, when the inner wall abutting portion 10 correctly abuts against the inner wall of the cylindrical tube, the contact portion 7 of the outer circumferential protruding portion 12 is brought into contact with the cylindrical tube 2. In this state, the operation unit 62 is operated to fix the device to the end portion of the cylindrical tube, and in this state, the flange 4 previously inserted into the cylindrical tube is connected to the tube. By moving back in the end direction, the correct welding position will be set. In the position setting state, temporary welding and permanent welding are performed to join the flange to the cylindrical tube.

上記の第４実施形態においては２つのナット部材６６．６８は、それぞれ外周１２０度位相位置に３個の軸支ブラケットを有し、それに対応する一対のリンク杆を計３対有する構成で、同時に３個の位置決め部材を１２０度位置で半径方向に拡大縮小させる構成としているが、必ずしも３つの位相での３個の位置決め部材の拡大縮小構成に限ることなく、例えば図１７のように、１８０度位置に２個の位置決め部材を支持して同時に半径方向に拡大縮小させる構成としてもよいし、また、図１８に示すように、９０度位置に計４個の位置決め部材を支持して同時に拡大縮小操作を行って溶接位置を設定させるようにすることも可能である。 In the fourth embodiment, each of the two nut members 66.68 has three shaft support brackets at the outer peripheral 120 degree phase position, and has a pair of link rods corresponding to the three shaft support brackets. The three positioning members are configured to be enlarged / reduced in the radial direction at a 120 ° position, but are not necessarily limited to the three-member positioning member enlargement / reduction configuration in three phases, for example, as shown in FIG. A configuration may be adopted in which two positioning members are supported at the position and simultaneously enlarged or reduced in the radial direction, or, as shown in FIG. 18, a total of four positioning members are supported at the 90 degree position and simultaneously enlarged or reduced. It is also possible to perform the operation and set the welding position.

以上説明した本発明のフランジの溶接位置決め装置は上記した実施形態の構成のみに限定されるものではなく、本発明の特許請求の範囲に記載された発明の本質を逸脱しない範囲において、任意の改変を加えても本発明の権利の範囲に含まれる。例えば、上記すべての実施形態の位置決め部材の材質は、金属、合成樹脂、金属と合成樹脂とを一体に組み付けたもの、その他本発明の位置決め部材として機能し得る条件下で任意の材料を用いることができる。 The flange welding positioning apparatus of the present invention described above is not limited to the configuration of the above-described embodiment, and can be arbitrarily modified without departing from the essence of the invention described in the claims of the present invention. Is included in the scope of the right of the present invention. For example, the material of the positioning member of all the above embodiments is metal, synthetic resin, one in which metal and synthetic resin are integrally assembled, or any other material under conditions that can function as the positioning member of the present invention. Can do.

本発明のフランジの溶接位置決め装置は円筒管へのフランジの溶接全般にわたる位置決め装置として水処理システム、産業機械、水力・変電設備、搬送、空調設備、食品・化学、発電プラント等に使用されるすべての円筒管・フランジ溶接作業において適用可能である。 The welding positioning device for flanges of the present invention is a positioning device that covers the entire welding of flanges to cylindrical pipes. It is used for water treatment systems, industrial machinery, hydropower / transformation equipment, conveyance, air conditioning equipment, food / chemistry, power plants, etc. It can be applied in cylindrical tube / flange welding work.

１、１−２、１−３，１−４フランジの溶接位置決め装置
２円筒管
２ａ円筒管内壁
２ｆ円筒管の端面
４フランジ
４ａフランジ面
５、５１，５２，５３，５４１，５４２，５４３位置決め部材
６装着機構
７当たり部
１０，１０１内壁当接部
１２，１２１外周突設部
１４，１４１段差部
１４ａ，１４１ａ段差面
１４ｂ差部
１６支持桿
１８伸縮固定装置
２２ガイドピン
２４縦穴
２６ビス
２８支持杆
３０伸縮移動装置
３１案内筒
３６固定部材
６０拡大縮小装置
６２操作部
７０Ａ、７０Ｂ、７０Ｃ、７２Ａ、７２Ｂ、７２Ｃリンク杆
７４付勢部材
７６移動管
８０付勢ばね
８４操作ハンドル DESCRIPTION OF SYMBOLS 1, 1-2, 1-3, 1-4 Flange welding positioning apparatus 2 Cylindrical pipe 2a Cylindrical pipe inner wall 2f End face of cylindrical pipe 4 Flange 4a Flange surface 5, 51, 52, 53, 541, 542, 543 Positioning member 6 Mounting mechanism 7 Contact portion 10, 101 Inner wall contact portion 12, 121 Outer peripheral projection portion 14, 141 Step portion 14a, 141a Step surface 14b Difference portion 16 Support rod 18 Extending / fixing fixing device 22 Guide pin 24 Vertical hole 26 Screw 28 Support rod DESCRIPTION OF SYMBOLS 30 Telescopic movement apparatus 31 Guide cylinder 36 Fixed member 60 Enlarging / reducing apparatus 62 Operation part 70A, 70B, 70C, 72A, 72B, 72C Link rod 74 Energizing member 76 Moving pipe 80 Energizing spring 84 Operation handle

Claims

It is a welding positioning device for the flange to the end of the cylindrical tube,
With the cylindrical tube inserted through the center hole of the flange, it is placed near the end surface of the cylindrical tube, and the contact part that hits the flange surface included in the plane parallel to the end surface of the cylindrical tube is located at multiple positions on the outer periphery of the cylindrical tube edge. A plurality of positioning members to be formed;
A mounting mechanism for mounting distraction freely pressing the plurality of positioning members in the circumferential direction like the angular position of the cylindrical tube, was closed,
The positioning member includes an inner wall abutting portion that extends along the inner wall of the cylindrical tube in the axial direction of the cylindrical tube, and an L-shaped collar member that is connected to the inner wall abutting portion at a right angle to form an L-shaped body. An outer peripheral projecting portion that has a contact portion that hits the flange surface and has a corner portion that engages with an edge of the cylindrical tube,
Provided at the corner of the L-shaped body, which is a connection site between the outer peripheral projecting portion and the inner wall contact portion, at a position longer in the radial direction from the axis of the cylindrical tube than the contact position of the inner wall contact portion with the cylindrical tube inner wall. A step portion including a step surface and a difference portion provided in a direction perpendicular to the step surface and contacting the end surface of the cylindrical tube,
The step portion forms a step due to the step surface and the difference portion from the contact portion included in the plane parallel to the end surface of the cylindrical tube, and is a direction away from the end edge of the cylindrical tube along the axis of the cylindrical tube. Is provided so that the step surface and the outer peripheral surface of the cylindrical tube are set to be flush with each other when the flange surface of the flange is brought into contact with the contact portion.
The outer peripheral protruding portion includes a contact portion and a step portion,
In addition, the outer peripheral projecting portion and the inner wall abutting portion of the positioning member are separately formed and divided so that the outer peripheral projecting portion can be moved toward and away from the radial direction of the cylindrical tube. 2. A flange welding positioning according to claim 1 , wherein a thickness adjusting positioning mechanism is provided for performing thickness adjusting positioning so that the outer surface of the cylindrical tube is fixed at a required moving position where the outer surface of the cylindrical tube is flush with the cross section. apparatus.

Two positioning members are provided so as to be arranged at the diameter position of the cylindrical tube,
The mounting mechanism includes a telescopic fixing device that supports each positioning member so as to extend and contract in the diameter direction of the cylindrical tube, and fixes the positioning member in the vicinity of the end surface of the cylindrical tube by fixing at an arbitrary expansion / contraction position. The welding positioning apparatus for a flange according to claim 2, wherein:

The positioning members are provided so as to be arranged at an equal angle on the edge of the cylindrical tube,
The mounting mechanism is connected to the positioning member, and supports a plurality of positioning members at the same time in the radial direction of the cylindrical tube so as to be freely scalable.
3. An operation unit connected to the enlarging / reducing device and pressing the inner wall contact portion of the positioning member against the inner wall of the cylindrical tube by an operation from the outside of the cylindrical tube. The welding positioning apparatus of the flange as described.

The enlarging / reducing device includes a plurality of link members that support three positioning members and are variably held so as to be easily inserted into the tube hole of the cylindrical tube while being linked to each other, and an urging member. A welding positioning apparatus for a flange according to claim 3.

The three positioning members are provided so as to be arranged at three equal angles on the edge of the cylindrical tube,
The mounting mechanism includes support rods that respectively support three positioning members arranged at three equal angles;
The flange positioning apparatus according to claim 1 , further comprising an expansion / contraction moving device that expands / contracts the support rods in three directions at equal angles that are radial directions .