JP3579371B2

JP3579371B2 - Processing method and equipment for multilayer stranded wire

Info

Publication number: JP3579371B2
Application number: JP2001173284A
Authority: JP
Inventors: 一夫松橋
Original assignee: Suzuki Metal Industry Co Ltd
Current assignee: Suzuki Metal Industry Co Ltd
Priority date: 2001-06-07
Filing date: 2001-06-07
Publication date: 2004-10-20
Anticipated expiration: 2021-06-07
Also published as: JP2002371485A

Description

【０００１】
【発明の属する技術分野】
本発明はＰＣ鋼撚り線に代表される平行撚りの多層撚り線の加工方法と装置に関し、特に筒型高速撚り線機による多層撚り線の加工方法と装置に関するものである。
【０００２】
【従来の技術】
多層撚り線は用途により撚り構成が選択されるが、例えばプレストレスト・コンクリート構造体に使用されるＰＣ鋼多層撚り線は、コンクリートに圧縮応力を負荷し、構造体の強度を高めている。ＰＣ鋼多層撚り線は使用上の都合から撚り線径（断面積）が細く、長時間高緊張力下で繰返し荷重を受けるので、引張強度が高く、レラクセーシヨン特性を有するものが要求され、この特性を得るために平行撚りが選択される。
【０００３】
多層撚り線の加工には確実な撚りを得るために、籠型撚り線機かフライヤ数の多い筒型撚り線機が使用される。しかし、籠型撚り線機は機構上から処理速度が遅く、生産性が低い。また、筒型撚り線機は全長（ライン）が長くなり、設備費も高価なものになる。
【０００４】
一般的な筒型撚り線機を使用して多層撚り線を加工する場合、多層撚り線の層数分だけ繰返し撚り加工を行うことになる。この場合、下撚りと上撚りの撚りピツチを合せないと、正常な平行撚りの多層撚り線が得られない。このため、従来は変速歯車を切替えたり、交流サーボモータと差動装置を組み込んだ機械的な制御が考えられる。つまり、下撚りと上撚りを同一条件で処理すると、上撚り後の線径が太くなる分だけ、引取り機での線速が速くなり、下撚りと上撚りの撚りピッチに狂いが生じる。下撚りと上撚りの撚りピッチは撚り線機の回転数と引取り速度で決定される。しかし、プレフォーミングでの撚りピッチの調整は計算通りとはならず、確実な管理が難しい。
【０００５】
上述のように、従来の多層撚り線の加工方法では、正確な平行撚りの多層撚り線を得るには設備費が高価なものとなるだけでなく、多層撚り線の寸法の調整や装置の経時変化などに対する調整に時間を要し、装置の稼働率が低く、調整に使用される材料の損失が多くなる。
【０００６】
【発明が解決しようとする課題】
本発明の課題は上述の問題に鑑み、作業性に優れかつ正常な平行撚り加工を可能にした、多層撚り線の加工方法と装置を提供することにある。
【０００７】
【課題を解決するための手段】
上記課題を解決するために、本発明の構成はボビンを支持する複数の筒状のフライヤを直列に接続し、最前のフライヤの前端に円錐筒からなるプレフォーム装置を同軸に結合し、各ボビンから引き出した下撚り素線と同数かつ下撚り素線よりも大径の上撚り素線を、フライヤとともに回転するプレフォーム装置の円錐面に沿つてジグザグ状に案内する一方、予め複数の下撚り素線を芯線に下撚り加工してなる下撚り線を、スタンドのボビンから各フライヤの中心軸線に沿つて引き出し、さらに撚り戻し板を経てボイスへ挿通し、前記プレフォーム装置からの上撚り素線を前記撚り戻し板を通過した下撚り素線に平行撚りし、各上撚り素線をボイスを貫通させてフライヤと同期回転する引出しドラムにより引き出すようにし、前記撚り戻し板は円板の周縁部に沿つて周方向等間隔に各下撚り素線を各別に挿通する通孔を設けてなり、かつ前記プレフォーム装置の前端にボイスに対向して支持してなり、前記撚り戻し板で下撚り素線が径外方へ互いに引き離され、下撚り素線とプレフォーム装置で線ぐせを付けられた上撚り素線とがボイスへ近づく時、フライヤの回転に伴つて上撚り素線が下撚り素線に、下撚り素線と同じ方向へ撚り合されることを特徴とする。
【０００８】
また、本発明の構成はボビンをそれぞれ支持する複数の筒状のフライヤを直列に接続し、該フライヤの前端に円錐筒からなるプレフォーム装置を同軸に結合し、各ボビンから引き出した上撚り素線をプレフォーム装置の円錐面に沿ってジグザグ状に案内し、かつスタンドからフライヤの中心軸線に沿って引き出した、予め複数の下撚り素線を芯線に下撚り加工してなる下撚り線に平行撚りし、上撚り線をボイスを貫通させてフライヤと同期回転する引出しドラムにより引き出す多層撚り線機において、上撚り加工時に、ボイスに対向するプレフォーム装置の前端に、円板の周縁部に沿って周方向等間隔に下撚り線の各下撚り素線を各別に挿通する通孔を設けてなる撚戻し板を配設したことを特徴とする。
【００１１】
【発明の実施の形態】
本発明では一般的な筒型高速撚り線機（ストランダ）を使用し、簡便な方法で処理速度が速く確実な平行撚り加工が得られるようにする。このため、撚り線の撚りピッチは撚り線機の回転数と引取り機の引取り速度で決定する。
【００１２】
下撚りと上撚りの撚り線径が異なる時は、撚り線機の回転数と引取り機の引取り速度を調整する必要がある。引取り速度の調整は下撚り加工時、上撚り素線の線径の２倍分だけ引取り機の引出しドラムの外径を大きくするか、または上撚り加工時、下撚り加工で用いた引取り機の引出しドラムの外径を上撚り素線の線径の２倍分だけ小さくする。
【００１３】
平行撚りをより確実なものにするために、上撚り加工時、下撚り素線をボイスの手前で一時撚り戻し、ボイス部で下撚り素線と上撚り素線とを同時に撚り合せる。上述の方法を繰り返すことにより、平行撚りの多層撚り線の加工が可能になる。下撚り加工時の引取り速度を、上撚り素線の線径分の速度で処理することにより、つまり下撚り加工時の引出しドラム（巻取り釜）の外径を上撚り素線の線径分だけ大きくする。具体的には、引出しドラム（巻取り釜）の外周面に上撚り素線の線径分の厚さの複数のスペーサ（調整板）を配設して段付引出しドラムとし、上撚り素線の線径分だけ大径の段付引出しドラムで処理する。しかし、上撚り加工時の引出しドラムの外径を上撚り素線の線径分だけ小さくしてもよい。上撚り加工時、下撚り素線を１度撚りほぐし、ボイスで下撚り素線と上撚り素線を同時に撚り合せることにより正常な加工ができる。
【００１４】
本発明によれば、筒型撚り線機を使用して、簡便な方法で下撚りと上撚りの撚り方向が同じ多層撚り線を得ることができる。
【００１５】
【実施例】
本発明をＰＣ鋼多層撚り線（１９本２層撚り線）についての加工方法と装置について説明する。図１，２に示す２層撚り線２０は、まず直径８ｍｍの芯線２の周囲に直径４．０７ｍｍの９本の下撚り素線３を螺旋状に巻き付けて下撚り線（１層撚り線）１０を構成し、次いで、下撚り線１０を芯線として、下撚り線１０の周囲に直径７．２５ｍｍの９本の上撚り素線４を下撚り素線３と同方向に螺旋状に巻き付けて構成される。芯線２と素線３，４の強度は表１に示すとおりであり、また、２層撚り線２０の特性は表２に示すとおりである。
【００１６】
表１

表２

図３に示すように、下撚り線１０は筒型撚り線機により、芯線２に下撚り素線３を撚り加工して形成され、巻取り機５２の巻取りドラム３１に巻き取つた下撚り線１０を、同じ筒型撚り線機の芯線スタンド１２へ装架し、下撚り線１０を芯線とし、下撚り線１０に上撚り素線４を撚り加工して得る。図３は筒型撚り線機により下撚り線１０を得る工程を示す側面図である。筒型撚り線機は９個の筒状のフライヤ２１の端部フランジを互いに突き合せて直列に接続され、回転駆動されるようになつている。最前（最右側）のフライヤ２１には、円錐筒２２と、３個の円錐筒２２からなるプレフォーム装置２３とが順に接続される。各フライヤ２１には中心軸４１に対してそれぞれ垂直でありかつ回転位相を異にする軸により、ボビン１４が回転可能に支持される。
【００１７】
９個のボビン１４から引き出された下撚り素線３は、互いに軸方向平行かつ周方向等間隔に並ぶように、フライヤ２１の内部を通り、円錐筒２２のフランジ２２ａに周方向等間隔に設けた９個の通孔へ各別に挿通される。円錐筒２２に周方向等間隔に並べられた各下撚り素線３は、プレフォーム装置２３の３個の溝付きローラ４４，４６，４８へジグザグ状に案内される。プレフォーム装置２３はフライヤ２１の中心軸４１のフランジ４２に結合される（図６を参照）。一方、フライヤ２１よりも後方に配設した芯線スタンド１２のドラム１３から、芯線２がフライヤ２１、円錐筒２２、プレフォーム装置２３の中心軸線に沿つて引き出され、不動のボイス２７へ挿通される。
【００１８】
図４に示すように、軸方向に並びかつ外径が次第に小さくなる３つの円錐筒４３，４５，４７の各外周面に、９個の溝付きローラ４４，４６，４８が径方向の軸により周方向等間隔に支持される。各ローラ４４，４６，４８は回転位相を異にして配設され、下撚り素線３がローラ４４，４６，４８を順に通過する時、波形に湾曲される。つまり、線ぐせを付けられてボイス２７を通過するように、引出しドラム２８により定速度で引き出される。この時、フライヤ２１と円錐筒２２とプレフォーム装置２３の一体的な回転に伴い、９本の下撚り素線３が互いに中心（芯線２）へ近づき、芯線２に螺旋状に巻き付けられ、ボイス２７で外周側から絞られて正常な下撚り線１０が形成される。ボイス２７は下撚り線１０の外径とほぼ等しい通孔を有し、該通孔の入口側と出口側の内径は外方へ次第に大きくなつている。
【００１９】
ボイス２７を通過した下撚り線１０は、軸２９により回転駆動される引出しドラム２８に１回または２回巻き付けられた後、下撚り線１０の出口側に配設した巻取りスタンド３０の巻取りドラム３１へ巻き取られる。引出しドラム２８が定速度で回転されるのに対して、巻取りドラム３１は下撚り線１０の巻取り量に応じて回転数が制御される。しかし、滑りクラッチを巻取りドラム３１とこれを駆動する駆動軸との間に備えてもよい。
【００２０】
下撚り線１０の撚りピッチはフライヤ２１の回転数と引出しドラム２８の回転数により決まる。下撚り線１０の撚りピッチが上撚り加工工程での上撚り素線４の撚りピッチと等しくなるように、引出しドラム２８の外周面には多数の当て板ないし調整板３３が、図５に示すように、周方向等間隔に結合される。調整板３３は下撚り線１０の引出し速度つまり引出しドラム２８の周速を調整するものであり、外径が大きくなる２層撚り線２０を引き出す場合には、引出し速度が速くなる。調整板３３の厚さを２層撚り線２０の外径と下撚り線１０の外径との差の１／２とすれば，２層撚り線２０と同じ引出し速度で下撚り線１０を引き出すことができる。
【００２１】
巻取りドラム３１に巻き取られた下撚り線１０は、図３に示す芯線スタンド１２へ移され、筒型撚り線機により下撚り加工と同様の方法で、下撚り線１０を芯線とし、下撚り線１０の周囲に９本の上撚り素線４を螺旋状に巻き付けられる。この場合、図６に示すように、プレフォーム装置２３は溝付きローラ４４，４６，４８を溝幅の広いものに交換し、また、２層撚り線２０の外径に対応したボイス２７ａに交換する。上撚り加工工程では、プレフォーム装置２３の軸部から前方へ延びる複数の支持部材４９の先端に、撚り戻し板５０が支持される。また、上撚り加工工程では引出しドラム２８から調整板３３を取り外す。
【００２２】
各フライヤ２１には上撚り素線４を巻き付けたボビン１４が支持される。プレフォーム装置２３の中心軸部から引き出された下撚り線１０は、撚り戻し板５０に周方向等間隔に設けた９個の通孔へ挿通されて、下撚り線１０の下撚り素線３が径外方へ互いに引き離される。そして、下撚り素線３とプレフォーム装置２３で線ぐせを付けられた上撚り素線４とがボイス２７ａへ近づく時、フライヤ２１の回転に伴つて上撚り素線４が下撚り素線３に、下撚り素線３と同じ方向へ撚り合される。上撚り素線４と下撚り素線３がボイス２７ａを通過すると、図１に示すような正常に撚り合された２層撚り線２０が形成される。上撚り加工時、フライヤ２１は下撚り加工の時と同じ回転数で回転され、引出しドラム２８も調整板３３を取り除かれて下撚り加工の時と同じ回転数で回転され、下撚り線１０と同じ撚りピッチで上撚り加工が達せられる。
【００２３】
［具体的実施例］
既存の筒型高速撚り線機を使用して、ＰＣ鋼多層撚り線（１９本撚り、外径２８．６ｍｍ、ＪＩＳＧ３５３６）の処理を行つた。撚り線用線材には表１に示す伸線加工材を使用した。処理条件は下撚りと上撚りの引取り速度を５０ｍ／ｍｉｎで行つた。下撚り加工時、引取り機の引出しドラム２８の外径を上撚り素線４の線径の２倍分だけ大きくし、上撚り加工時、引取り機の引出しドラム２８の外径を元に戻し（引出しドラムの外径を上撚り素線の線径の２倍分だけ小さくし）、ボイス２７ａの手前で撚り戻し板５０により下撚り素線３の撚りを戻し、下撚り素線３と上撚り素線４を同時に撚り合せた。
【００２４】
１条６０００ｋｇ（長さ１．４１８ｋｍ）を処理して、途中でトラブルがなく加工できた。撚り加工後、多層撚り線にテンパ処理を行つた。得られた多層撚り線の特性は、規格を満足するものであつた。
【００２８】
【発明の効果】
本発明によれば、多層撚り線加工で平行撚りを行う場合に、上撚り加工時下撚り素線をボイスの手前で撚り戻し、下撚り素線を上撚り素線と同時に撚り合せることにより、下撚りと上撚りが確実に平行な撚りになる。
【００３０】
籠型撚り線機に比べて、筒型撚り線機では繰返し処理になるが、処理速度が速く生産性が高い。
【図面の簡単な説明】
【図１】多層撚り線の正面断面図である。
【図２】多層撚り線を得るための下撚り線の正面断面図である。
【図３】筒型撚り線機の全体構成を示す側面図である。
【図４】同筒型撚り線機の下撚り加工時の要部を拡大して示す側面図である。
【図５】下撚り加工時の引取り機の引出しドラムの外径を調整する調整板の装着状態を示す側面図である。
【図６】同筒型撚り線機の上撚り加工時の要部を拡大して示す側面図である。
【符号の説明】
２：芯線３：下撚り素線４：上撚り素線１０：下撚り線１１：フライヤ
１２：芯線スタンド１３：ドラム１４：ボビン２０：２層撚り線２１：フライヤ２２：円錐筒２３：プレフォーム装置２７，２７ａ：ボイス
２８：引出しドラム２９：軸３０：巻取りスタンド３１：巻取りドラム
３３：調整板４２：フランジ４３：円錐筒４４：ローラ４５：円錐筒
４６：ローラ４７：円錐筒４８：ローラ４９：支持部材５０：撚戻し板
５２：巻取り機[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method and an apparatus for processing a multi-layered stranded wire of parallel twist typified by a stranded PC steel, and more particularly to a method and an apparatus for processing a multi-layered stranded wire by a cylindrical high-speed stranded wire machine.
[0002]
[Prior art]
The stranded configuration of the multilayer stranded wire is selected depending on the application. For example, a PC steel multilayer stranded wire used for a prestressed concrete structure applies a compressive stress to the concrete and increases the strength of the structure. PC steel multilayer stranded wires have a small stranded wire diameter (cross-sectional area) and are subjected to repeated loads under high tension for a long period of time because of their use. Therefore, those with high tensile strength and relaxation properties are required. Parallel twist is selected to obtain
[0003]
For processing a multi-layer stranded wire, a cage type stranded wire machine or a tubular stranded wire machine having a large number of flyers is used in order to obtain a reliable twist. However, the basket type stranded wire machine has a low processing speed due to its mechanism, and has low productivity. In addition, the length of the tubular stranded wire machine (line) is long, and the equipment cost is high.
[0004]
When processing a multi-layer stranded wire using a general cylindrical stranded wire machine, the number of layers of the multi-layer stranded wire is repeated for the number of layers. In this case, unless the twist pitches of the lower twist and the upper twist are matched, a normal parallel twisted multilayer twisted wire cannot be obtained. Therefore, conventionally, mechanical control in which a transmission gear is switched or an AC servomotor and a differential device are incorporated is considered. In other words, when the first twist and the first twist are processed under the same conditions, the wire speed in the take-up machine increases as much as the wire diameter after the first twist increases, and the twist pitch of the first twist and the first twist is deviated. The twist pitch of the first twist and the first twist is determined by the rotation speed and the take-up speed of the twisting machine. However, the adjustment of the twist pitch in preforming is not as calculated, and it is difficult to reliably control the twist pitch.
[0005]
As described above, in the conventional method for processing a multilayer stranded wire, not only is the equipment cost expensive to obtain an accurate parallel stranded multilayer stranded wire, but also the adjustment of the dimensions of the multilayer stranded wire and the aging of the device are not performed. It takes time to adjust for changes and the like, the operation rate of the device is low, and the loss of materials used for the adjustment increases.
[0006]
[Problems to be solved by the invention]
In view of the above problems, an object of the present invention is to provide a method and an apparatus for processing a multi-layer stranded wire which are excellent in workability and enable normal parallel twisting.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the configuration of the present invention connects a plurality of cylindrical flyers supporting a bobbin in series, and coaxially couples a preform device consisting of a conical cylinder to the front end of the foremost flyer. While the same number of lower twisted wires drawn from the wire and the larger diameter of the upper twisted wire is larger than the lower twisted wire , the twisted wire is guided in a zigzag shape along the conical surface of the preform device rotating together with the flyer, while a plurality of pre-twisted wires are Pull out the twisted wire formed by twisting the wire into the core wire from the bobbin of the stand along the center axis of each flyer, further insert it into the voice through the untwisting plate, and twist the twisted element from the preform device. more parallel to the twist wires passing through the untwisted plate lines, so as to each of the upper twisted strands are passed through the voice withdraw the drawer drum rotating flyer and synchronously, the untwisting plate A through hole is provided for inserting each of the lower twisted wires separately at equal intervals in the circumferential direction along the periphery of the plate, and is supported at the front end of the preform device so as to face a voice, and the untwisting is performed. When the lower strands are pulled apart from each other outward by the plate and the lower strands and the upper strands that have been straightened by the preform device approach the voice, the upper strands rotate as the flyer rotates. It is characterized in that the wire is twisted into the lower strand in the same direction as the lower strand.
[0008]
Further, in the configuration of the present invention, a plurality of tubular flyers each supporting a bobbin are connected in series, a preform device formed of a conical cylinder is coaxially connected to the front end of the flyer, and the upper twisting element drawn out from each bobbin. Guides the wire in a zigzag shape along the conical surface of the preform device, and draws out from the stand along the center axis of the flyer. In a multi-layer stranded wire machine that lays out the twisted wires in parallel and pulls out the twisted wire through a puller drum that rotates synchronously with the flyer, during the top twisting process, at the front end of the preform device facing the voice, at the peripheral edge of the disk A twist return plate is provided which is provided with through holes through which the individual twisted strands of the twisted strand are separately inserted at equal intervals along the circumferential direction.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
In the present invention, a general tubular high-speed stranded wire machine (Stranda) is used, and a processing speed is high and a parallel twisting process can be reliably performed by a simple method. For this reason, the twist pitch of the stranded wire is determined by the rotation speed of the stranded wire machine and the take-up speed of the take-up machine.
[0012]
When the stranded wire diameters of the ply-twist and the ply-twist are different, it is necessary to adjust the rotation speed of the stranded wire machine and the take-up speed of the take-up machine. The take-up speed can be adjusted by increasing the outer diameter of the draw-out drum of the take-up machine by twice the wire diameter of the twisted strand during the twisting process, or by using the twisting process used during the twisting process. The outer diameter of the draw-out drum of the take-off machine is reduced by twice the diameter of the twisted strand.
[0013]
In order to make parallel twisting more reliable, at the time of finish twisting, the twisted element wire is temporarily untwisted before the voice, and the twisted element wire and the twisted element wire are simultaneously twisted at the voice portion. By repeating the above method, it is possible to process a multi-layer stranded wire of parallel twist. By processing the take-up speed at the time of primary twisting at the speed of the wire diameter of the primary twisted wire, that is, the outer diameter of the drawing drum (winding pot) at the time of primary twisting is changed to the wire diameter of the primary twisted wire. Increase by a minute. Specifically, a plurality of spacers (adjustment plates) having a thickness corresponding to the wire diameter of the twisted element wire are arranged on the outer peripheral surface of the draw drum (winding pot) to form a stepped extraction drum. Is processed with a large-diameter stepped drawer drum by the wire diameter of However, the outer diameter of the drawing drum at the time of the twisting may be reduced by the wire diameter of the twisted element wire. At the time of the twisting, normal twisting can be performed by untwisting the twisted strand once and twisting the twisted strand and the twisted strand together with a voice.
[0014]
ADVANTAGE OF THE INVENTION According to this invention, the twist direction of the same twist of a bottom twist and a top twist can be obtained by the simple method using a cylindrical twisted wire machine.
[0015]
【Example】
The present invention will be described with respect to a processing method and apparatus for a PC steel multilayer stranded wire (19 double-layer stranded wires). The two-layer stranded wire 20 shown in FIGS. 1 and 2 is formed by first winding nine lower-stranded wires 3 having a diameter of 4.07 mm around a core wire 2 having a diameter of 8 mm in a spiral manner (a single-layer stranded wire). 10 and then, using the lower stranded wire 10 as a core wire, nine upper stranded wires 4 having a diameter of 7.25 mm around the lower stranded wire 10 are spirally wound in the same direction as the lower stranded wire 3. Be composed. The strength of the core wire 2 and the

strands

3 and 4 is as shown in Table 1, and the characteristics of the two-layer stranded wire 20 are as shown in Table 2.
[0016]
Table 1

Table 2

As shown in FIG. 3, the lower stranded wire 10 is formed by twisting the core wire 2 with the lower stranded element wire 3 by using a tubular stranded wire machine, and the lower stranded wire is wound around a winding drum 31 of a winding machine 52. The wire 10 is mounted on a core wire stand 12 of the same tubular stranded wire machine, the lower stranded wire 10 is used as a core wire, and the lower stranded wire 10 is twisted with the upper stranded element wire 4 to obtain the wire. FIG. 3 is a side view showing a step of obtaining the lower stranded wire 10 by the tubular stranded wire machine. The tubular stranded wire machine is connected in series with the end flanges of nine tubular flyers 21 butted against each other, and is driven to rotate. A conical cylinder 22 and a preform device 23 composed of three conical cylinders 22 are sequentially connected to the foremost (rightmost) flyer 21. The bobbins 14 are rotatably supported on the respective flyers 21 by axes that are perpendicular to the central axis 41 and have different rotation phases.
[0017]
The lower twisted strands 3 drawn out from the nine bobbins 14 pass through the inside of the flyer 21 and are provided on the flange 22a of the conical cylinder 22 at equal circumferential intervals so as to be axially parallel to each other and arranged at equal intervals in the circumferential direction. Each of the nine through holes is separately inserted. Each of the lower twisted strands 3 arranged at equal intervals in the circumferential direction in the conical cylinder 22 is guided in a zigzag manner to three

grooved rollers

44, 46, 48 of the preform device 23. The preform device 23 is connected to the flange 42 of the center shaft 41 of the flyer 21 (see FIG. 6). On the other hand, the core wire 2 is pulled out from the drum 13 of the core wire stand 12 disposed behind the flyer 21 along the center axis of the flyer 21, the conical cylinder 22, and the preform device 23, and inserted into the immobile voice 27. .
[0018]
As shown in FIG. 4, nine

grooved rollers

44, 46, 48 are provided on the outer peripheral surfaces of three

conical cylinders

43, 45, 47, which are arranged in the axial direction and whose outer diameter is gradually reduced, by a radial shaft. It is supported at equal intervals in the circumferential direction. The

rollers

44, 46, and 48 are arranged with different rotation phases, and are curved into a waveform when the lower strand 3 passes through the

rollers

44, 46, and 48 in order. In other words, the paper is drawn out at a constant speed by the drawer drum 28 so as to pass through the voice 27 with a straight line. At this time, with the integral rotation of the flyer 21, the conical cylinder 22, and the preform device 23, the nine lower twisted wires 3 approach each other to the center (core wire 2), and are spirally wound around the core wire 2, and At 27, a normal lower stranded wire 10 is formed by being squeezed from the outer peripheral side. The voice 27 has a through-hole substantially equal to the outer diameter of the lower twisted wire 10, and the inner diameter of the through-hole on the inlet side and the inner side of the through-hole gradually increases outward.
[0019]
The stranded wire 10 having passed through the voice 27 is wound once or twice around a drawing drum 28 driven to rotate by a shaft 29, and then wound by a winding stand 30 disposed on the exit side of the stranded wire 10. It is wound up on the drum 31. While the pull-out drum 28 is rotated at a constant speed, the number of rotations of the winding drum 31 is controlled according to the winding amount of the lower stranded wire 10. However, a slip clutch may be provided between the winding drum 31 and a drive shaft for driving the winding drum.
[0020]
The twist pitch of the lower twisted wire 10 is determined by the rotation speed of the flyer 21 and the rotation speed of the drawer drum 28. In order to make the twist pitch of the lower stranded wire 10 equal to the twist pitch of the upper stranded element wire 4 in the plying process, a number of contact plates or adjusting plates 33 are provided on the outer peripheral surface of the drawing drum 28 as shown in FIG. In this way, they are connected at equal intervals in the circumferential direction. The adjusting plate 33 adjusts the drawing speed of the lower stranded wire 10, that is, the peripheral speed of the drawing drum 28. When the two-layer stranded wire 20 whose outer diameter is increased is drawn, the drawing speed is increased. If the thickness of the adjusting plate 33 is の of the difference between the outer diameter of the two-layer stranded wire 20 and the outer diameter of the lower stranded wire 10, the lower stranded wire 10 is drawn at the same drawing speed as the two-layer stranded wire 20. be able to.
[0021]
The lower stranded wire 10 wound on the winding drum 31 is transferred to the core wire stand 12 shown in FIG. 3, and the lower stranded wire 10 is used as the core wire in the same manner as the lower stranded wire by a tubular stranded wire machine. Nine upper twisted wires 4 are spirally wound around the stranded wire 10. In this case, as shown in FIG. 6, the preforming device 23 replaces the grooved

rollers

44, 46, and 48 with those having a wider groove width, and replaces them with the voice 27a corresponding to the outer diameter of the two-layer stranded wire 20. I do. In the twisting step, the untwisted plate 50 is supported on the tips of a plurality of support members 49 extending forward from the shaft of the preform device 23. Further, the adjusting plate 33 is removed from the drawing drum 28 in the upper twisting process.
[0022]
Each flyer 21 supports a bobbin 14 around which the twisted element wire 4 is wound. The lower stranded wire 10 pulled out from the central shaft portion of the preform device 23 is inserted into nine through holes provided at equal intervals in the circumferential direction in the untwisting plate 50, and the lower stranded wire 3 of the lower stranded wire 10 is formed. Are pulled away from each other radially outward. Then, when the lower twisted strand 3 and the upper twisted strand 4 which has been straightened by the preform device 23 approach the voice 27a, the upper twisted strand 4 is turned along with the rotation of the flyer 21. Is twisted in the same direction as the lower twisted element wire 3. When the upper twisted wire 4 and the lower twisted wire 3 pass through the voice 27a, a normally twisted two-layer twisted wire 20 as shown in FIG. 1 is formed. At the time of the first twisting, the flyer 21 is rotated at the same rotation speed as at the time of the first twisting, and the drawer drum 28 is also rotated at the same rotation speed as at the time of the first twisting with the adjustment plate 33 removed. The first twist processing can be achieved at the same twist pitch.
[0023]
[Specific embodiment]
Using an existing cylindrical high-speed stranded wire machine, processing of a PC steel multilayer stranded wire (19 strands, outer diameter 28.6 mm, JIS G3536) was performed. The drawn wire shown in Table 1 was used as the wire for the stranded wire. The treatment was performed at a take-up speed of 50 m / min. At the time of bottom twisting, the outer diameter of the pull-out drum 28 of the take-up machine is increased by twice the wire diameter of the twisted element wire 4, and at the time of top twisting, based on the outer diameter of the pull-out drum 28 of the pull-up machine. Unwinding (reducing the outer diameter of the draw-out drum by twice the wire diameter of the twisted element wire), untwisting the untwisted element wire 3 by the untwisting plate 50 before the voice 27a, and The upper twisted wires 4 were simultaneously twisted.
[0024]
One 6000 kg (length: 1.418 km) was processed without any trouble on the way. After the twisting, a tempering treatment was performed on the multilayer stranded wire. The properties of the obtained multilayer stranded wire satisfied the standard.
[0028]
【The invention's effect】
According to the present invention, when performing parallel twisting in multi-layer stranded wire processing, by re-twisting the lower twisted wire before the voice during the upper twisting process, by twisting the lower twisted wire at the same time as the upper twisted wire, The first twist and the first twist are certainly parallel twists.
[0030]
Compared to the cage type stranded wire machine, the cylindrical stranded wire machine is a repetitive process, but the processing speed is high and the productivity is high.
[Brief description of the drawings]
FIG. 1 is a front sectional view of a multilayer stranded wire.
FIG. 2 is a front sectional view of a lower stranded wire for obtaining a multilayer stranded wire.
FIG. 3 is a side view showing the overall configuration of the tubular stranded wire machine.
FIG. 4 is an enlarged side view showing a main part of the tubular stranded wire machine at the time of bottom twisting.
FIG. 5 is a side view showing a state in which an adjusting plate for adjusting the outer diameter of a draw-out drum of the take-up machine at the time of bottom twisting is mounted.
FIG. 6 is a side view showing, in an enlarged manner, a main part of the tubular stranded wire machine at the time of upper twisting.
[Explanation of symbols]
2: core wire 3: lower twisted wire 4: upper twisted wire 10: lower twisted wire 11: flyer 12: core wire stand 13: drum 14: bobbin 20: two-layer twisted wire 21: flyer 22: conical cylinder 23:

preform Apparatus

27, 27a: Voice 28: Pull-out drum 29: Shaft 30: Winding stand 31: Winding drum 33: Adjusting plate 42: Flange 43: Conical cylinder 44: Roller 45: Conical cylinder 46: Roller 47: Conical cylinder 48: Roller 49: Support member 50: Twist return plate 52: Winding machine

Claims

ボビンを支持する複数の筒状のフライヤを直列に接続し、最前のフライヤの前端に円錐筒からなるプレフォーム装置を同軸に結合し、各ボビンから引き出した下撚り素線と同数かつ下撚り素線よりも大径の上撚り素線を、フライヤとともに回転するプレフォーム装置の円錐面に沿つてジグザグ状に案内する一方、予め複数の下撚り素線を芯線に下撚り加工してなる下撚り線を、スタンドのボビンから各フライヤの中心軸線に沿つて引き出し、さらに撚り戻し板を経てボイスへ挿通し、前記プレフォーム装置からの上撚り素線を前記撚り戻し板を通過した下撚り素線に平行撚りし、各上撚り素線をボイスを貫通させてフライヤと同期回転する引出しドラムにより引き出すようにし、前記撚り戻し板は円板の周縁部に沿つて周方向等間隔に各下撚り素線を各別に挿通する通孔を設けてなり、かつ前記プレフォーム装置の前端にボイスに対向して支持してなり、前記撚り戻し板で下撚り素線が径外方へ互いに引き離され、下撚り素線とプレフォーム装置で線ぐせを付けられた上撚り素線とがボイスへ近づく時、フライヤの回転に伴つて上撚り素線が下撚り素線に、下撚り素線と同じ方向へ撚り合されることを特徴とする多層撚り線機。A plurality of tubular flyers supporting bobbins are connected in series, a preform device consisting of a conical cylinder is coaxially connected to the front end of the foremost flyer, and the same number and number of twisted strands as the twisted strands drawn from each bobbin While twisting a twisted element wire with a diameter larger than that of the wire in a zigzag shape along the conical surface of the preform device that rotates with the flyer, multiple twisted element wires are twisted into a core wire in advance. The wire is pulled out from the bobbin of the stand along the center axis of each flyer, and further inserted into the voice through the untwisting plate, and the twisted elementary wire from the preform apparatus is passed through the untwisting plate. more parallel to, each upper twisted strands are passed through a voice to draw the drawer drum rotating flyer and synchronously, the untwisting plate each lower twisted in along connexion circumferentially equal intervals on the periphery of the disc Each of the strands is provided with a through hole to be inserted separately, and is supported at the front end of the preform device so as to face a voice, and the twisted strands are separated from each other outward by the untwisting plate, When the twisted strand and the twisted strand twisted by the preforming device approach the voice, the twisted strand is turned into the twisted strand with the rotation of the flyer, in the same direction as the twisted strand. Multi-layer stranded wire machine characterized by being twisted.