JP4711462B2 - Method of welding steel bar with fixing part and steel bar with fixing part - Google Patents

Method of welding steel bar with fixing part and steel bar with fixing part Download PDF

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JP4711462B2
JP4711462B2 JP2005232629A JP2005232629A JP4711462B2 JP 4711462 B2 JP4711462 B2 JP 4711462B2 JP 2005232629 A JP2005232629 A JP 2005232629A JP 2005232629 A JP2005232629 A JP 2005232629A JP 4711462 B2 JP4711462 B2 JP 4711462B2
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steel bar
welding
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fixing part
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正之 大垣
聡 村山
祥人 内海
俊樹 松山
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岡部株式会社
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本発明は、鉄骨骨組等の鋼製の構造材に対してコンクリート構造物を接合する接合手段として使用される定着部付き棒鋼の溶接技術に関する。   The present invention relates to a welding technique for a steel bar with a fixing portion used as a joining means for joining a concrete structure to a steel structural member such as a steel frame.

従来から鉄骨骨組等の鋼製の構造材に対してコンクリート構造物を接合する場合に、鋼製の構造材に対して異形棒鋼や頭付きの棒鋼あるいは折曲部付きの棒鋼を溶接し、その棒鋼とコンクリートとの付着力によって両者を接合する接合技術は広く知られている（例えば、特許文献１参照）。また、コンクリートに対する定着作用が大きい頭付きの棒鋼を用いて、鋼製の構造材に対して溶接する場合には、その棒鋼の上端部に設けられた頭部を介して溶接ガンに装着して溶接する方法が広く知られている（特許文献２、特許文献３参照）。さらに、棒鋼の端部に設ける定着部を単純な円板状だけではなく楕円形や長円形に形成したり、定着部を棒鋼に対して偏心させたものなども知られている（特許文献４参照）。
特許第２８２４７６８号公報 特公昭４９−５１０２号公報 特開平４−３３３３７６号公報 特開２０００−２５７２０９号公報 Conventionally, when a concrete structure is joined to a steel structure such as a steel frame, a deformed steel bar, a headed steel bar, or a steel bar with a bent portion is welded to the steel structural material. The joining technique which joins both by the adhesive force of a steel bar and concrete is widely known (for example, refer patent document 1). Also, when using a steel bar with a head that has a large fixing effect on concrete and welding it to a steel structural material, attach it to the welding gun via the head provided at the upper end of the steel bar. A welding method is widely known (see Patent Document 2 and Patent Document 3). Furthermore, a fixing part provided at the end of the steel bar is not only a simple disk shape but also an ellipse or an oval, or a fixing part eccentric with respect to the steel bar is known (Patent Document 4). reference).
Japanese Patent No. 2824768 Japanese Patent Publication No.49-5102 JP-A-4-333376 JP 2000-257209 A

ところで、従来技術において、頭部付き棒鋼を溶接する場合には、棒鋼の頭部を介して溶接ガンに装着するという技術手段が採用されていたため、コンクリートとの定着力を増大するために頭部を拡大すれば、その頭部を保持する溶接ガン側のチャック手段も大きくしなければならないという技術的問題があった。しかも、棒鋼の頭部に対するチャック代は、頭部の厚さにより決定されるため、その頭部の厚みでは十分な装着力の確保が困難であり、溶接不良となる一因にもなっていた。また、装着力を確保するために、頭部の厚さをあまり厚く設定することは実用的ではない。さらに、その溶接ガン側のチャック手段の拡大により、隣接する棒鋼相互間の最小ピッチも制約を受けることになり、棒鋼を密に設置したい場合などには不便であった。また、頭部の寸法に関して種類がある場合には、そのたびに保持部材を置換する等の作業が必要とされた。とりわけ、頭部の形状が単純な円板状ではなく楕円形や矩形状などの場合や、棒鋼に対して偏心している場合には、チャック手段が複雑になり対応が困難であった。   By the way, in the prior art, when welding a steel bar with a head, the technical means of attaching to the welding gun via the head of the steel bar has been adopted, so the head to increase the fixing power with concrete However, there is a technical problem in that the chuck means on the side of the welding gun that holds the head must be enlarged. In addition, since the chucking cost for the head of the steel bar is determined by the thickness of the head, it is difficult to ensure a sufficient mounting force with the thickness of the head, which has also contributed to poor welding. . Moreover, it is not practical to set the thickness of the head too thick in order to secure the mounting force. Furthermore, the expansion of the chuck means on the welding gun side limits the minimum pitch between adjacent steel bars, which is inconvenient when it is desired to install the steel bars densely. In addition, when there are types of head dimensions, work such as replacing the holding member is required each time. In particular, when the shape of the head is not a simple disc shape but an ellipse or a rectangle, or when the head is eccentric with respect to the steel bar, the chuck means becomes complicated and difficult to cope with.

本発明は、以上のような従来の技術的状況に鑑みて開発したもので、棒鋼に設ける定着部の大きさや形状に対する制約を解消し、コンクリートに対する良好な定着作用が得られ、しかも溶接ガン側のチャック手段をそのまま共通に使用できる、使い勝手のきわめて良好な定着部付き棒鋼の溶接技術を提供することを目的とするものである。   The present invention has been developed in view of the above-described conventional technical situation, eliminates the restrictions on the size and shape of the fixing portion provided on the steel bar, provides a good fixing action on concrete, and further has a welding gun side. It is an object of the present invention to provide a welding technique for a steel bar with a fixing portion that can be used in common as it is, and is extremely easy to use.

本発明では、前記課題を解決するため、棒鋼に対して該棒鋼の最大外周面より大きな外形からなる定着部を別途設置するとともに、前記定着部の設置において、前記棒鋼の反溶接側の端部にチャック代をあけて定着部を設け、そのチャック代を介して棒鋼を溶接ガンに装着した状態で溶接を行うという技術手段を採用した。すなわち、本発明は、コンクリートに対する定着作用を増大すべく、当該棒鋼の最大外周面より大きな外形からなる定着部を別途設置するに当って、その棒鋼の反溶接側の端部にチャック代をあけて定着部を設けるという技術手段を採用した点に特徴を有するものである。なお、ここで棒鋼の最大外周面とは、当該棒鋼において最も外側に位置する最も大きな外周面のことであり、当該棒鋼が棒部のみからなり表面に凹凸部を有しない場合にはその棒部の最大外周面を指し、また棒部自体の表面に竹節状やネジ状などの凹凸部が形成されている場合（この凹凸部も棒鋼の一部である）にはその凹凸部の最大外周面を指す。 In the present invention, in order to solve the above-described problem, a fixing portion having an outer shape larger than the maximum outer peripheral surface of the steel bar is separately installed with respect to the steel bar. A technical means was adopted in which a fixing portion was provided by opening a chuck margin, and welding was performed with the steel bar attached to the welding gun via the chuck margin. That is, according to the present invention, in order to increase the fixing effect on the concrete, when a fixing portion having an outer shape larger than the maximum outer peripheral surface of the steel bar is separately installed, a chuck margin is opened at the end of the steel bar on the anti-welding side. Thus, the present invention is characterized in that a technical means of providing a fixing unit is employed. Here, the maximum outer peripheral surface of the steel bar is the largest outer peripheral surface located on the outermost side of the steel bar. When the steel bar consists only of a bar part and does not have an uneven part on the surface, the bar part The maximum outer peripheral surface of the uneven portion when the uneven portion such as bamboo knot or screw is formed on the surface of the rod portion itself (this uneven portion is also a part of the bar steel) Point to.

本発明によれば、棒鋼の端部と定着部との間に形成したチャック代を介して溶接ガンに装着するように構成したので、次の効果を得ることができる。
（１）定着部の大きさや形状に対する制約が解消される。したがって、必要に応じて定着部を最適の大きさや形状に設定することができ、しかもその定着部の外形は少なくとも棒鋼の最大外周面より大きく設定されることから、コンクリートに対する良好な定着作用がより確実に得られる。
（２）溶接ガン側のチャック手段は棒鋼自体のチャック代を保持し、定着部は保持しないので、定着部の大きさや形状が変化しても、棒鋼自体が変化しない限り、そのまま共通して使用することができる。
（３）定着部の形状が単純な円板状ではなく楕円形や矩形状などの場合や、棒鋼に対して偏心している場合にも、影響を受けることなく、そのまま対応することが可能である。
（４）溶接ガン側のチャック手段は棒鋼自体のチャック代を保持するだけであるから、定着部の大きさを拡大しても、それに伴う従来の溶接ガン側のチャック手段の拡大に基づく棒鋼相互間の最小ピッチに対する影響は解消でき、棒鋼のより密な設置が可能である。


According to the present invention, since it is configured to be attached to the welding gun via the chuck margin formed between the end portion of the steel bar and the fixing portion, the following effects can be obtained.
(1) The restriction on the size and shape of the fixing unit is eliminated. Therefore, it is possible to set the fixing unit if necessary to the optimum size and shape, yet since the outer shape of the fixing portion is set larger than the maximum outer peripheral surface of at least bars, more is good fixing effect on concrete It is definitely obtained.
(2) The chucking means on the welding gun side holds the chucking cost of the bar steel itself and does not hold the fixing part. Therefore, even if the size and shape of the fixing part changes, the bar steel itself does not change, so it can be used in common can do.
(3) Even when the shape of the fixing portion is not a simple disc shape but an ellipse or a rectangle, or when the fixing portion is eccentric with respect to the steel bar, it can be handled as it is without being affected. .
(4) Since the chuck means on the welding gun side only holds the chucking cost of the steel bar itself, even if the size of the fixing portion is increased, the bar steel mutual bonding based on the expansion of the conventional chuck means on the welding gun side is accompanied. The effect on the minimum pitch between the steel bars can be eliminated, and denser installation of steel bars is possible.


本発明に係る溶接技術は、鉄骨骨組等の鋼製の構造材に対してコンクリート構造物を接合する場合に広く適用することが可能である。因みに、杭頭部にコンクリート定着用の鉄筋を設置する場合などにも適用できる。本発明で使用される棒鋼としては、竹節状やネジ状などの適宜の形状の異形棒鋼や丸棒状の棒鋼など、適宜の棒鋼を採用することができる。定着部に関しては、定着部材に対して棒鋼を両側から溶接したものや、定着部材に形成した挿通孔に棒鋼を挿通して溶接したものや、棒鋼に形成したネジ部に螺合したナットにより定着部材を締付け固定したもの、あるいは鍛造等により棒鋼と一体的に形成されたものなど、適宜の形態が可能である。要は、棒鋼の上端部と定着部材との間に少なくとも棒鋼の装着に十分なチャック代を形成したものであればよい。また、定着部の具体的形状に関しては、円板状のものだけでなく、ソロバン状のものや楕円形あるいは矩形状などの適宜形状の定着部の採用が可能である。さらに、定着部と棒鋼とが同心的に設置されたものだけでなく、偏心して設置されたものでも適用が可能である。とりわけ、後者の定着部が棒鋼と偏心して設置された形態に本発明に係る溶接方法を適用した場合には、その偏心状態に全く影響されることなく、定着部の端部側に形成されたチャック代を介して溶接ガンに装着し得ることから、その効用はきわめて大きい。なお、チャック手段としては、棒鋼のチャック代を掴んだり把持する形態だけでなく、チャック代に嵌合した状態で保持し得るように構成した形態など、適宜の形態の採用が可能である。要は、棒鋼のチャック代を介して棒鋼を的確に装着し得るものであればよい。   The welding technique according to the present invention can be widely applied when a concrete structure is joined to a steel structural member such as a steel frame. Incidentally, it can also be applied to the case where concrete reinforcing bars are installed on the pile head. As the steel bar used in the present invention, a suitable steel bar such as a deformed steel bar having an appropriate shape such as a bamboo knot shape or a screw shape or a round bar-shaped steel bar can be employed. The fixing unit is fixed by welding a steel bar from both sides to the fixing member, welding a steel bar through an insertion hole formed in the fixing member, or a nut screwed into a screw part formed in the steel bar. Appropriate forms are possible, such as one in which the member is fastened and fixed, or one formed integrally with the steel bar by forging or the like. In short, it is only necessary that at least a chuck allowance for mounting the steel bar is formed between the upper end of the steel bar and the fixing member. In addition, regarding the specific shape of the fixing unit, not only a disk-shaped one but also a fixing unit having an appropriate shape such as a soroban shape, an elliptical shape, or a rectangular shape can be employed. Furthermore, not only the fixing portion and the steel bar are installed concentrically but also an eccentric installation can be applied. In particular, when the welding method according to the present invention is applied to a configuration in which the latter fixing portion is installed eccentrically with the steel bar, the fixing portion is formed on the end side of the fixing portion without being affected by the eccentric state at all. Since it can be attached to the welding gun via the chuck, its utility is extremely large. In addition, as a chuck | zipper means, not only the form which grips the chuck | zipper cost of a steel bar, but the form configured so that it can hold | maintain in the state fitted to the chuck | zipper allowance is employable. In short, what is necessary is just to be able to mount the steel bar accurately through the chucking cost of the steel bar.

図１は本発明に係る溶接方法及び定着部付き棒鋼を用いた一実施例の要部を全体的に示した概略説明図、図２はその溶接部を示した平面図、図３は棒鋼の装着状態を示した要部拡大図である。図１中、１は溶接ガンで、溶接用電源装置２に溶接ケーブル３及び制御ケーブル４を介して接続されている。溶接ガン１はチャック手段５を備えており、そのチャック手段５により被溶接用の棒鋼６を保持し得るように構成されている。また、溶接ガン１は支持杆７を備え、その支持杆７の下端部に支持したアークシールド部材により溶接部の周囲を被覆することによって安定した溶接状態が得られるように構成されている。本実施例では、図２にも示したように、Ｈ形鋼８からなる母材に対して棒鋼６を溶接する場合を示した。なお、図中、９は主筋、１０はフープ筋、１１は棒鋼６の溶接や他の配筋が完了した後に打設されるコンクリートを示したものである。そして、棒鋼６は、図３の要部拡大図でも示したように、反溶接側の端部に溶接ガン１側に装着するためのチャック代Ｌをあけて定着部１２を設けている点で特徴を有する。このチャック代Ｌは、少なくとも溶接ガン１のチャック手段５によって保持可能な長さを有するものであればよい。なお、図３中のチャック手段５は、概念的に例示したものであり、適宜のチャック手段の採用が可能である。   FIG. 1 is a schematic explanatory view generally showing the main part of one embodiment using a welding method and a steel bar with a fixing part according to the present invention, FIG. 2 is a plan view showing the welded part, and FIG. It is the principal part enlarged view which showed the mounting state. In FIG. 1, reference numeral 1 denotes a welding gun, which is connected to a welding power source device 2 via a welding cable 3 and a control cable 4. The welding gun 1 is provided with chuck means 5, and the chuck means 5 is configured to hold a steel bar 6 to be welded. Further, the welding gun 1 includes a support rod 7 and is configured so that a stable welding state can be obtained by covering the periphery of the welded portion with an arc shield member supported on the lower end portion of the support rod 7. In this embodiment, as shown in FIG. 2, the case where the steel bar 6 is welded to the base material made of the H-section steel 8 is shown. In the figure, 9 is the main reinforcement, 10 is the hoop, and 11 is the concrete to be placed after the welding of the steel bar 6 and other reinforcements. And the steel bar 6 is the point which provided the fixing | fixed part 12 by opening the chuck | zipper margin L for mounting | wearing with the welding gun 1 side at the edge part of a non-welding side, as shown also in the principal part enlarged view of FIG. Has characteristics. The chuck allowance L only needs to have a length that can be held by at least the chuck means 5 of the welding gun 1. Note that the chuck means 5 in FIG. 3 is conceptually illustrated, and appropriate chuck means can be employed.

しかして、棒鋼６を母材としてのＨ形鋼８に対して溶接する場合には、図１に示したように、母材としてのＨ形鋼８にクランプ手段１３を介して溶接用電源装置２のプラス側に接続されたアースケーブル１４を接続し、溶接用電源装置２のマイナス側に接続された溶接ケーブル３との間で溶接用電源回路を形成する。その上で、図３に示したように棒鋼６の端部に形成したチャック代Ｌを溶接ガン１のチャック手段５により保持することによって、棒鋼６を溶接ガン１側に装着する。しかる後、棒鋼６の溶接側端部を母材としてのＨ形鋼８の所定の溶接位置に合せ、支持杆７の下端部に支持したアークシールド部材により溶接部の周囲を被覆した上、溶接ガン１のスイッチを入れて溶接を実行することになる。その後、さらに以上の溶接操作を順次繰返して所要本数の棒鋼をそれぞれ母材の所定位置に溶接するとともに、これと前後して前記主筋９やフープ筋１０などの必要な配筋を施した上、コンクリート１１を打設することになる。   Thus, when the steel bar 6 is welded to the H-section steel 8 as the base material, as shown in FIG. 2 is connected to the ground cable 14 connected to the plus side, and a welding power supply circuit is formed with the welding cable 3 connected to the minus side of the welding power supply device 2. Then, the bar 6 is mounted on the welding gun 1 side by holding the chuck margin L formed at the end of the bar 6 with the chuck means 5 of the welding gun 1 as shown in FIG. Thereafter, the welding side end of the steel bar 6 is aligned with a predetermined welding position of the H-shaped steel 8 as a base material, and the arc shield member supported on the lower end of the support rod 7 is coated around the welded portion, and then welded. The gun 1 is switched on and welding is performed. Thereafter, the above welding operation is further repeated sequentially to weld the required number of steel bars to predetermined positions of the base material, and after the necessary reinforcements such as the main reinforcement 9 and the hoop reinforcement 10 before and after this, Concrete 11 will be cast.

図４は定着部１２に関する具体例を示した部品構成図である。本図中の（Ａ）〜（Ｄ）は、それぞれ定着部１２のタイプを例示したもので、（Ａ）の例は、定着部１２を構成する定着部材に対してチャック代Ｌを形成する装着用軸部１５とスタッド軸部１６とを両側からアークスタッド溶接等の適宜の溶接法にて溶接することにより前記棒鋼６を形成したものである。この場合、溶接に代えて摩擦圧接によることも可能である。図中、１７はスタッド軸部１６の下端面に付設したフラックスである。（Ｂ）の例は、定着部１２を構成する定着部材に挿通孔を設け、その挿通孔にスタッド軸部１８を挿通して上部にチャック代Ｌを形成した状態で両者を溶接することにより前記棒鋼６を形成したものである。（Ｃ）の例は、スタッド軸部１９の上部にネジ部２０を形成し、そのネジ部２０に螺合したナット２１，２２間に定着部１２を構成する定着部材を挟んで締付け固定することにより前記棒鋼６を形成したものである。この場合には、ナット２１の上部にチャック代Ｌが形成される。（Ｄ）の例は、スタッド軸部２３に対して所定の太めの外径を有するネジ軸２４を摩擦圧接し、そのネジ軸２４に螺合したナット２５，２６間に定着部１２を構成する定着部材を挟んで締付け固定することにより前記棒鋼６を形成したものであり、この場合には、スタッド軸部２３の外径が変化してもネジ軸２４の外径が一定であることから、同じチャック手段５によって対応することが可能である。なお、本例ではコンタクト式のアークスタッド溶接で使用される棒鋼に関して示したが、ギャップ式のアークスタッド溶接や他の溶接法にも本発明の適用が可能であり、その場合には、例えばスタッド軸部の下端面に設けるフラックスなどは当該溶接法に応じた形態に変更されることになる。   FIG. 4 is a component configuration diagram illustrating a specific example of the fixing unit 12. (A) to (D) in this figure exemplify the type of the fixing unit 12, respectively. In the example of (A), a mounting for forming a chuck margin L on a fixing member constituting the fixing unit 12 The steel bar 6 is formed by welding the shaft portion 15 and the stud shaft portion 16 from both sides by an appropriate welding method such as arc stud welding. In this case, it is also possible to use friction welding instead of welding. In the drawing, 17 is a flux attached to the lower end surface of the stud shaft portion 16. In the example of (B), the fixing member constituting the fixing unit 12 is provided with an insertion hole, and the stud shaft portion 18 is inserted into the insertion hole and the chuck margin L is formed on the upper portion, thereby welding the two together. A steel bar 6 is formed. In the example of (C), a screw portion 20 is formed on the upper portion of the stud shaft portion 19, and a fixing member constituting the fixing portion 12 is sandwiched between the nuts 21 and 22 screwed to the screw portion 20 to be fastened and fixed. Thus, the steel bar 6 is formed. In this case, a chuck allowance L is formed on the nut 21. In the example of (D), a screw shaft 24 having a predetermined thick outer diameter is friction-welded to the stud shaft portion 23, and the fixing portion 12 is configured between nuts 25 and 26 screwed into the screw shaft 24. The steel bar 6 is formed by clamping and fixing with a fixing member interposed therebetween, and in this case, the outer diameter of the screw shaft 24 is constant even if the outer diameter of the stud shaft portion 23 changes. It is possible to cope with the same chuck means 5. In this example, the steel bar used for contact type arc stud welding is shown. However, the present invention can also be applied to gap type arc stud welding and other welding methods. The flux provided on the lower end surface of the shaft portion is changed to a form corresponding to the welding method.

さらに、図５は定着部１２に関する他の具体例を示した部品構成図であり、本例の場合には、上方の平面図に示したように定着部１２として楕円状の定着部材を用いてその偏心した位置に挿通孔２７を形成し、その挿通孔にスタッド軸部２８を挿通して、上部にチャック代Ｌを形成した状態で両者を溶接することにより前記棒鋼６を形成したものである。この場合には、定着部１２が偏心しているにも拘らず、スタッド軸部２８の上部に形成されたチャック代を介して溶接ガン側に装着するので、溶接位置に関する位置決めが容易である。すなわち、定着部１２の外形や偏心状態及びその偏心方向などに影響されることなく、所定の溶接位置に容易に溶接することができる。   FIG. 5 is a component configuration diagram showing another specific example of the fixing unit 12. In this example, an elliptical fixing member is used as the fixing unit 12 as shown in the upper plan view. The steel bar 6 is formed by forming the insertion hole 27 at the eccentric position, inserting the stud shaft portion 28 into the insertion hole, and welding the both in a state where the chuck margin L is formed at the upper part. . In this case, although the fixing portion 12 is eccentric, the fixing portion 12 is attached to the welding gun side via a chuck margin formed on the upper portion of the stud shaft portion 28, so that positioning with respect to the welding position is easy. That is, welding can be easily performed at a predetermined welding position without being affected by the outer shape, the eccentric state, and the eccentric direction of the fixing unit 12.

本発明に係る一実施例の要部を全体的に示した概略説明図である。It is the schematic explanatory drawing which showed the principal part of one Example which concerns on this invention generally. その溶接部を示した平面図である。It is the top view which showed the welding part. 棒鋼の装着状態を示した要部拡大図である。It is the principal part enlarged view which showed the mounting state of the steel bar. 定着部に関する具体例を示した部品構成図である。It is a component block diagram which showed the specific example regarding a fixing part. 定着部に関する他の具体例を示した部品構成図である。It is a component block diagram which showed the other specific example regarding a fixing | fixed part.

符号の説明Explanation of symbols

１…溶接ガン、２…溶接用電源装置、３…溶接ケーブル、４…制御ケーブル、５…チャック手段、６…棒鋼、７…支持杆、８…Ｈ形鋼、９…主筋、１０…フープ筋、１１…コンクリート、１２…定着部、１３…クランプ手段、１４…アースケーブル、１５…装着用軸部、１６…スタッド軸部、１７…フラックス、１８，１９…スタッド軸部、２０…ネジ部、２１，２２…ナット、２３…スタッド軸部、２４…ネジ軸、２５，２６…ナット、２７…挿通孔、２８…スタッド軸部

DESCRIPTION OF SYMBOLS 1 ... Welding gun, 2 ... Power supply apparatus for welding, 3 ... Welding cable, 4 ... Control cable, 5 ... Chuck means, 6 ... Bar steel, 7 ... Support bar, 8 ... H-section steel, 9 ... Main reinforcement, 10 ... Hoop reinforcement 11 ... concrete, 12 ... fixing part, 13 ... clamping means, 14 ... ground cable, 15 ... mounting shaft part, 16 ... stud shaft part, 17 ... flux, 18, 19 ... stud shaft part, 20 ... screw part, 21, 22 ... nut, 23 ... stud shaft part, 24 ... screw shaft, 25, 26 ... nut, 27 ... insertion hole, 28 ... stud shaft part

Claims (2)

棒鋼に対して該棒鋼の最大外周面より大きな外形からなる定着部を別途設置するとともに、前記定着部の設置において、前記棒鋼の反溶接側の端部にチャック代をあけて定着部を設け、そのチャック代を介して棒鋼を溶接ガンに装着した状態で溶接を行うことを特徴とする定着部付き棒鋼の溶接方法。 In addition to separately installing a fixing part having an outer shape larger than the maximum outer peripheral surface of the steel bar with respect to the steel bar, in the installation of the fixing part, a fixing part is provided by opening a chuck margin at an end of the steel bar on the anti-welding side, A welding method for a steel bar with a fixing portion, characterized in that welding is performed with the steel bar attached to a welding gun via the chucking margin. 棒鋼に対して該棒鋼の最大外周面より大きな外形からなる定着部を別途設置するとともに、前記定着部の設置において、前記棒鋼の反溶接側の端部に溶接ガンに装着可能なチャック代をあけて定着部を設け、そのチャック代を介して溶接ガンに装着した状態で溶接可能に構成したことを特徴とする定着部付き棒鋼。 A fixing part having an outer shape larger than the maximum outer peripheral surface of the steel bar is separately installed for the steel bar, and a chuck allowance that can be attached to a welding gun is opened at the end of the steel bar on the non-welding side. A steel bar with a fixing portion, characterized in that a fixing portion is provided and welding is possible with the fixing portion being attached to a welding gun via a chucking margin.
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JPS5687274U (en) * 1979-12-11 1981-07-13

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JPS5316423A (en) * 1976-07-28 1978-02-15 Takenaka Komuten Co Fixation portion of reinforced end portion
JPS5687274A (en) * 1979-12-14 1981-07-15 Fujitsu Ltd Data recording and reproducing system of magnetic recorder and reproducer
JPS63145566A (en) * 1986-12-09 1988-06-17 Sharp Corp Schedule management equipment
JPS63295068A (en) * 1987-05-25 1988-12-01 Kuchiku Kogyo Kk Bar-shaped electrodeposited stud
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