JP6440746B2 - Vertical full rotation bit - Google Patents

Vertical full rotation bit Download PDF

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JP6440746B2
JP6440746B2 JP2016574612A JP2016574612A JP6440746B2 JP 6440746 B2 JP6440746 B2 JP 6440746B2 JP 2016574612 A JP2016574612 A JP 2016574612A JP 2016574612 A JP2016574612 A JP 2016574612A JP 6440746 B2 JP6440746 B2 JP 6440746B2
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hook
bobbin case
rotation
peripheral wall
inner hook
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JPWO2016129122A1 (en
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潤 畑中
潤 畑中
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株式会社廣瀬製作所
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
    • D05B57/10—Shuttles
    • D05B57/14—Shuttles with rotary hooks
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/28—Applications of bobbins for storing the lower thread

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Description

本発明は、ミシンに備えられる垂直全回転かまに関する。  The present invention relates to a vertical full rotation hook provided in a sewing machine.

従来技術の垂直全回転かまは、たとえば特許文献１に記載されている。この従来技術の垂直全回転かまは、ミシンの下軸に固定され、剣先部を有する外かまと、外かまに収容された状態で保持される内かまと、内かまに着脱自在に装着されるボビンケースと、下糸が巻回され、ボビンケースに収容されるボビンとを備える。  A conventional vertical full rotation hook is described in Patent Document 1, for example. This prior art vertical full rotation hook is fixed to the lower shaft of the sewing machine and is detachably mounted on the outer hook having a sword tip, the inner hook held in the outer hook, and the inner hook. A bobbin case and a bobbin around which a bobbin thread is wound and accommodated in the bobbin case are provided.

ミシンの縫製動作が開始されると、下軸が水平な回転軸線まわりに予め定める回転方向に回転駆動されるとともに、下軸の回転軸線に垂直な軸線に沿って縫針が前記回転軸線に近接および離反する動作を繰り返す。縫針に挿通された針糸は、剣先によって捕捉されて針糸ループを形成し、この針糸ループが内かまの表面に沿って移動しながら糸越しすることによって、針糸が内かまからミシンヘッド上の針板の針穴に引出されている下糸に係合して、被縫製物に縫目が形成される。  When the sewing operation of the sewing machine is started, the lower shaft is driven to rotate in a predetermined rotation direction around a horizontal rotation axis, and the sewing needle is brought close to the rotation axis along the axis perpendicular to the rotation axis of the lower shaft. Repeat the moving action. The needle thread inserted through the sewing needle is captured by the sword tip to form a needle thread loop, and the needle thread passes over the thread while moving along the surface of the inner hook. The stitches are formed on the workpiece by engaging with the lower thread drawn into the needle hole of the upper needle plate.

内かまは、略円筒状の周壁部と、周壁部の軸線方向一端部に連なって一直径線方向に延びて底部を形成するブリッジ部と、ブリッジ部に周壁部の軸線方向他端部側に向けて立設されるスタッドと、周壁部の軸線方向他端部側に連なって半径方向外方に延びる外向きフランジと、周壁部の外周面から突出して周方向に延びる略Ｃ字状の軌条とを有する。  The inner hook has a substantially cylindrical peripheral wall portion, a bridge portion that extends in one diameter line direction to one end portion in the axial direction of the peripheral wall portion, and forms a bottom portion on the other end side in the axial direction of the peripheral wall portion. A stud erected toward the end, an outward flange extending radially outwardly connected to the other axial end of the peripheral wall, and a substantially C-shaped rail protruding from the outer peripheral surface of the peripheral wall and extending in the peripheral direction And have.

周壁部には、縫針が挿通する針落ち孔が形成され、この針落ち孔が常に縫針の軸線上に配置されるように、内かまはミシンの機体に基端部が連絡された回り止め部材によって回り止めされ、外かまに追従して回転することが阻止されている。  The peripheral wall is formed with a needle drop hole through which the sewing needle is inserted, and an anti-rotation member whose base end is in contact with the inner body of the inner hook or the sewing machine so that the needle drop hole is always arranged on the axis of the sewing needle. Is prevented from rotating by following the outer hook.

ボビンケースは、内かま内に嵌まり込む円筒状の周壁部と、周壁部の一端部側の開口を塞ぐように設けられる端壁部と、端壁部に、周壁部の軸線に垂直な一直径線方向に移動自在に保持される、ラッチとも呼ばれる係合片と、係合片を一方向にばね付勢するラッチばねと、係合片をラッチばねのばね力に抗して他方向へ移動させる操作レバーとを備える。  The bobbin case includes a cylindrical peripheral wall portion that fits in the inner hook, an end wall portion that is provided so as to close an opening on one end side of the peripheral wall portion, and an end wall portion that is perpendicular to the axis of the peripheral wall portion. An engagement piece, also called a latch, held movably in the diameter direction, a latch spring that biases the engagement piece in one direction, and the engagement piece in the other direction against the spring force of the latch spring And an operating lever to be moved.

係合片は、帯状の基部と、基部の長手方向一端部にほぼ直角に連なる係合部とを有し、この係合部が周壁部から突出した状態で、係合片が係合部を突出させる方向にラッチばねによって一方向にばね付勢されている。ラッチばねは、圧縮コイルばねから成り、端壁部に係合片の長手方向と平行に設けられるばね収容孔に収容されている。  The engagement piece has a belt-like base portion and an engagement portion that extends substantially perpendicularly to one end portion in the longitudinal direction of the base portion, and the engagement piece projects the engagement portion with the engagement portion protruding from the peripheral wall portion. The spring is biased in one direction by a latch spring in the protruding direction. The latch spring is composed of a compression coil spring and is accommodated in a spring accommodation hole provided in the end wall portion in parallel with the longitudinal direction of the engagement piece.

内かまは、ボビンケースの周壁部がほぼぴったりと嵌合することができる周壁部と、周壁部の開放端側の一端部に連なるフランジ部とを有し、周壁部およびフランジ部には、周壁部とフランジ部とにわたって前述の係合部が係合する係合凹部が設けられる。内かまにボビンケースが装着された状態では、内かまの係合凹部にボビンケースの係合部が嵌まり込んで係合し、ボビンケースは内かまに対して、内かまの軸線まわりの回転が阻止されている。The inner hook has a peripheral wall portion that allows the peripheral wall portion of the bobbin case to be fitted almost exactly, and a flange portion that is connected to one end portion on the open end side of the peripheral wall portion, and the peripheral wall portion and the flange portion include a peripheral wall. An engaging recess is provided to engage the aforementioned engaging portion over the portion and the flange portion. In a state where the bobbin case is mounted on the inner hook, the engaging portion of the bobbin case is fitted into and engaged with the inner recess engaging recess, and the bobbin case rotates about the inner hook axis with respect to the inner hook. Is blocked.

実公昭６１−１４３７５号公報Japanese Utility Model Publication No. 61-14375

前述の従来技術では、ミシンの縫製動作が開始されると、縫針の往復変位動作および外かまの回転動作によって、下糸は縫製中に縫目の進行に伴ってボビンケースから引出されるため、ボビンは下糸の払い出しによる引張り力によってボビンケース内で回転している。ボビンケースは、前述のように、係合部が内かまの係合凹部に嵌まり込んで係合するので、ボビンケースの内かまの軸線まわりの回転が阻止されるが、ボビンケースは内かまに対してボビン交換時に着脱できなければならないので、係合部と係合凹部とは、０．１〜０．３ｍｍ程度の公差の範囲で、内かまの軸線に関して回転方向に隙間を有する。そのため、縫製時にボビンケースが内かまに対して主として回転方向の振動を生じ、上糸および下糸の張力変化によって糸切れおよび糸玉を生じてしまうという問題がある。  In the above-described prior art, when the sewing operation of the sewing machine is started, the lower thread is pulled out from the bobbin case with the progress of the stitches during sewing by the reciprocating displacement operation of the sewing needle and the rotation operation of the outer hook. The bobbin is rotated in the bobbin case by a pulling force generated by discharging the lower thread. As described above, the engaging portion of the bobbin case is engaged with the engaging recess of the inner hook so that the bobbin case is prevented from rotating about the axis of the inner hook of the bobbin case. On the other hand, since it must be detachable when exchanging the bobbin, the engaging portion and the engaging recess have a clearance in the rotational direction with respect to the axis of the inner hook within a tolerance range of about 0.1 to 0.3 mm. For this reason, there is a problem in that the bobbin case mainly generates vibration in the rotational direction with respect to the inner hook during sewing, and thread breakage and thread balls are generated due to changes in the tension of the upper thread and the lower thread.

本発明の目的は、糸切れおよび糸玉の発生を防止することができる垂直全回転かまを提供することである。  An object of the present invention is to provide a vertical full rotation rotary hook that can prevent yarn breakage and yarn ball generation.

本発明は、縫針が取付けられる針棒の軸線に垂直な回転軸線まわりに回転駆動される下軸に固定され、前記下軸の回転方向の下流側に先端部を向けて先細状となる剣先部を有する外かまと、
前記外かまに、前記回転軸線まわりに回転自在に保持される内かまであって、前記縫針が挿通する針落ち孔が形成される円筒状の周壁部と、前記周壁部の一端部から半径方向外方に延びるフランジ部とを有し、前記周壁部と前記フランジ部とにわたって係合凹部が設けられる内かまと、
前記内かまに着脱自在に装着されるボビンケースであって、前記係合凹部に前記回転方向に間隙をあけて着脱自在に係合する長手板状の係合片を有するボビンケースと、
前記係合凹部に前記係合片が係合した状態で、前記間隙に配設されるばね部材と、
前記ボビンケースに収容され、下糸が巻回されるボビンと、を含み、
前記ばね部材は、前記内かまのフランジ部に設けられ、前記係合片が前記係合凹部に前記回転方向下流側から支持された状態で、前記係合片を前記回転方向上流側から前記回転方向下流側に向けてばね付勢することを特徴とする垂直全回転かまである。 The present invention is a sword tip portion that is fixed to a lower shaft that is rotationally driven around a rotation axis perpendicular to an axis of a needle bar to which a sewing needle is attached, and that has a tapered shape with a tip portion directed downstream in the rotation direction of the lower shaft. With an outer bite,
A cylindrical peripheral wall portion in which a needle drop hole through which the sewing needle is inserted is formed in the outer hook, being rotatably held around the rotation axis, and a radial direction from one end portion of the peripheral wall portion A flange portion extending outward, and an inner hook provided with an engagement recess across the peripheral wall portion and the flange portion;
A bobbin case detachably mounted on the inner hook, the bobbin case having a longitudinal plate-like engagement piece that is detachably engaged with the engagement recess with a gap in the rotation direction;
In a state in which the engaging piece is engaged prior to Kigakarigo recess, and a spring member disposed in said gap,
Wherein is housed in the bobbin case, see contains a bobbin lower thread is wound, and
The spring member is provided on the flange portion of the inner rotary hook, and the engagement piece is rotated from the upstream side in the rotational direction with the engagement piece supported by the engagement recess from the downstream side in the rotational direction. The vertical full rotation is characterized in that the spring is biased toward the downstream side in the direction .

また本発明において、前記ばね部材は、板ばねであることが好ましい。  In the present invention, the spring member is preferably a leaf spring.

また本発明において、前記板ばねは、前記フランジ部の前記係合凹部よりも前記回転方向の上流側に固定される長手板状の取付け部と、前記取付け部の長手方向一端から前記間隙内に延び、前記回転方向の下流側に突出する突部とを有することが好ましい。  In the present invention, the leaf spring includes a longitudinal plate-shaped attachment portion fixed on the upstream side in the rotational direction with respect to the engagement recess of the flange portion, and a longitudinal end of the attachment portion in the gap from the longitudinal direction. It is preferable to have a protrusion that extends and protrudes downstream in the rotation direction.

本発明によれば、内かまの係合凹部にばね部材が設けられるので、ボビンケースを内かまに装着した状態では、前記係合片が前記係合凹部に前記回転方向下流側から支持された状態で、係合片がばね部材によって回転方向下流側にばね付勢され、ボビンケースの内かまに対する振動が抑制され、上糸および下糸の張力変化に伴なう糸切れおよび糸玉の発生を防止することができる。 According to the present invention, since the spring member is provided in the engagement recess of the inner hook, the engagement piece is supported by the engagement recess from the downstream side in the rotation direction in a state where the bobbin case is mounted on the inner hook . In this state, the engagement piece is spring-biased by the spring member to the downstream side in the rotation direction, vibration to the inner hook of the bobbin case is suppressed, and thread breakage and yarn ball generation due to changes in the tension of the upper thread and lower thread Can be prevented.

本発明の目的、特色、および利点は、下記の詳細な説明と図面とからより明確になるであろう。  Objects, features, and advantages of the present invention will become more apparent from the following detailed description and drawings.

本発明の一実施形態の垂直全回転かま１を示す正面図である。It is a front view which shows the vertical full rotation shuttle 1 of one Embodiment of this invention. 垂直全回転かま１を図１の切断面線ＩＩ−ＩＩから見た断面図である。It is sectional drawing which looked at the vertical full rotation shuttle 1 from cut surface line II-II of FIG. 内かま３の正面図である。It is a front view of the inner hook 3. ボビン４を収容したボビンケース５が装着される内かま３の正面図である。It is a front view of the inner hook 3 to which the bobbin case 5 that houses the bobbin 4 is mounted. 図３の切断面線Ｖ−Ｖから見た断面図である。It is sectional drawing seen from the cut surface line VV of FIG. 図４の切断面線ＶＩ−ＶＩから見た断面図である。It is sectional drawing seen from the cut surface line VI-VI of FIG. ばね部材５０付近の拡大断面図である。FIG. 4 is an enlarged cross-sectional view in the vicinity of a spring member 50. 内かま３の側面図である。It is a side view of the inner hook 3. ボビンケース５が装着された内かまの側面図である。It is a side view of the inner hook with which the bobbin case 5 was mounted | worn. 内かま３の背面図である。It is a rear view of the inner hook 3. ボビンケース５が装着された内かま３の背面図である。FIG. 6 is a rear view of the inner hook 3 to which the bobbin case 5 is attached. 本発明の他の実施形態の垂直全回転かま１ｂに備えられる内かま３のばね部材５０ａ付近の拡大断面図である。It is an expanded sectional view of the vicinity of the spring member 50a of the inner hook 3 provided in the vertical full rotation hook 1b of another embodiment of the present invention. ボビンケース５が装着された内かまのばね部材５０ａ付近の拡大断面図である。It is an expanded sectional view near the spring member 50a of the inner hook mounted with the bobbin case 5. 本発明のさらに他の実施形態の垂直全回転かま１ｂに備えられる内かまのばね部材５０ｂ付近の拡大断面図である。It is an expanded sectional view near the spring member 50b of the inner hook provided in the vertical full rotation rotary hook 1b of still another embodiment of the present invention. ボビンケース５が装着された内かま３のばね部材５０ｂ付近の拡大断面図である。It is an expanded sectional view of the vicinity of the spring member 50b of the inner hook 3 to which the bobbin case 5 is attached.

以下図面を参考にして本発明の好適な実施形態を詳細に説明する。
図１は、本発明の一実施形態の垂直全回転かま１を示す正面図であり、図２は垂直全回転かま１を図１の切断面線ＩＩ−ＩＩから見た断面図である。図３は内かま３の正面図であり、図４はボビン４を収容したボビンケース５が装着される内かま３の正面図である。図５は、図３の切断面線Ｖ−Ｖから見た断面図であり、図６は図４の切断面線ＶＩ−ＶＩから見た断面図である。Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front view showing a vertical full rotation hook 1 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the vertical full rotation hook 1 as seen from the section line II-II in FIG. FIG. 3 is a front view of the inner hook 3, and FIG. 4 is a front view of the inner hook 3 to which the bobbin case 5 accommodating the bobbin 4 is mounted. 5 is a cross-sectional view taken along the cutting plane line VV in FIG. 3, and FIG. 6 is a cross-sectional view taken along the cutting plane line VI-VI in FIG.

本実施形態の垂直全回転かま１は、外かま２と、内かま３と、ボビン４と、ボビンケース５とを含む。外かま２は、縫針６が着脱可能に同軸に取付けられ針棒７の軸線Ｌ１に垂直な回転軸線Ｌ２まわりに矢符Ａ方向に回転駆動される下軸８に固定される。外かま２は、下軸８の回転方向Ａ下流側に先端部を向けて先細状となる剣先部９を有する。  The vertical full rotation hook 1 of the present embodiment includes an outer hook 2, an inner hook 3, a bobbin 4, and a bobbin case 5. The outer hook 2 is fixed to a lower shaft 8 that is rotatably mounted in the direction of the arrow A around a rotation axis L2 perpendicular to the axis L1 of the needle bar 7 with the sewing needle 6 being detachably mounted on the same axis. The outer hook 2 has a sword tip 9 that tapers toward the downstream side in the rotational direction A of the lower shaft 8 with its tip portion tapered.

外かま２には、内かま３が嵌め込まれ、凹部１０に図示しない回り止め部材の凸部が嵌合して、内かま３の回転が阻止される。内かま３は、縫針６が挿通する針落ち孔１１が形成される円筒状の周壁部１２と、周壁部１２の軸線方向他端部に連なり、一直径線方向に延びるブリッジとも呼ばれる底部１３と、底部１３の中心に周壁部１２の軸線方向一端部側に向かって垂直に立設されるスタッド１４と、周壁部１２の軸線方向一端部に連なり、半径方向外方に拡開して形成されるフランジ部１５と、周壁部１２にその外周面から突出して形成される軌条１６とを有する。  An inner hook 3 is fitted into the outer hook 2, and a convex portion of a non-rotating member (not shown) is fitted into the concave portion 10, thereby preventing the inner hook 3 from rotating. The inner hook 3 includes a cylindrical peripheral wall portion 12 in which a needle drop hole 11 into which the sewing needle 6 is inserted is formed, and a bottom portion 13 called a bridge that extends to the other end in the axial direction of the peripheral wall portion 12 and extends in the one-diameter line direction. The stud 14 is vertically provided at the center of the bottom portion 13 toward the one end side in the axial direction of the peripheral wall portion 12 and is connected to the one end portion in the axial direction of the peripheral wall portion 12 so as to expand outward in the radial direction. And a rail 16 formed to protrude from the outer peripheral surface of the peripheral wall portion 12.

内かま３には、周壁部におよびフランジ部１５にわたって係合凹部２８が設けられる。  The inner hook 3 is provided with an engagement recess 28 in the peripheral wall portion and over the flange portion 15.

外かま２および内かま３は、たとえば浸炭焼入れ炭素鋼から成り、熱処理によって硬さ６５０ＨＶ以上とされる。またボビン４およびボビンケース５は、鋼鉄製またはステンレス鋼製である。  Outer hook 2 and inner hook 3 are made of, for example, carburized and hardened carbon steel, and have a hardness of 650 HV or higher by heat treatment. The bobbin 4 and the bobbin case 5 are made of steel or stainless steel.

フランジ部１５には、凹部１０の背後側、すなわち周壁部１２の軸線方向一端部側に、前述の針落ち孔１１が形成されるとともに、凹部１０によって規定される、前述の図示しない回り止め部材の凸部が嵌合する嵌合空間に、回転方向Ａ下流側から臨んで開放する下糸案内溝３５が形成される。下糸案内溝３５には、ボビンケース５の周壁部と、該周壁部に設けられる糸調子ばね３３との間から引出された下糸２１が挿通され、ミシンヘッドに設けられる針板の針穴３６に張架される下糸２１が、糸越し時に凹部１０から糸抜けして離脱するまでの間に図示しない糸切りメスによる切断動作などによって緩んでも、下糸案内溝３５内に嵌まり込んだ状態に保たれ、凹部１０から外部へ飛び出すことが防がれる。  In the flange portion 15, the above-described needle drop hole 11 is formed on the back side of the concave portion 10, that is, on one end side in the axial direction of the peripheral wall portion 12, and the above-described non-illustrated anti-rotation member defined by the concave portion 10. A lower thread guide groove 35 that opens from the downstream side in the rotation direction A is formed in the fitting space in which the convex portions of the first and second projections are fitted. The lower thread guide groove 35 is inserted with the lower thread 21 drawn from between the peripheral wall portion of the bobbin case 5 and the thread tension spring 33 provided on the peripheral wall portion, and the needle hole of the needle plate provided in the sewing head. Even if the lower thread 21 stretched by the thread 36 is loosened by a cutting operation by a thread trimming knife (not shown) before the thread is pulled out from the recess 10 and released when the thread is passed, the lower thread 21 fits into the lower thread guide groove 35. It is kept in a slender state and is prevented from jumping out of the recess 10 to the outside.

内かま３には、ボビンケース５が着脱自在に装着され、ボビンケース５には、ボビン糸とも呼ばれる下糸２１が巻回されたボビン４が収容される。ボビンケース５には、縫針６の降下を許容するための第１の切欠き２２が形成される。この第１の切欠き２２は、ボビンケース５の周壁部に軸線方向に延びて形成され、第２の切欠き２３に連なる。ボビンケース５には、内かま３に着脱自在に 係合するラッチ機構２５が設けられる。  A bobbin case 5 is detachably attached to the inner hook 3, and a bobbin 4 around which a lower thread 21, also called a bobbin thread, is wound is accommodated in the bobbin case 5. The bobbin case 5 is formed with a first notch 22 for allowing the needle 6 to descend. The first notch 22 is formed in the peripheral wall portion of the bobbin case 5 so as to extend in the axial direction, and is continuous with the second notch 23. The bobbin case 5 is provided with a latch mechanism 25 that is detachably engaged with the inner hook 3.

内かま３の内周部１７には、一対の突部２４が設けられる。これらの突部２４は、第２の切欠き２３を介して対向するボビンケース５の周壁部の内面に接触する。これによってボビンケース５を内かま３に装着する際に、ボビンケース５の内かま３への挿入を案内するとともに、ラッチ機構２５とともにボビンケース５と内かま３との相互の角変位を阻止する。  A pair of protrusions 24 are provided on the inner peripheral portion 17 of the inner shuttle 3. These protrusions 24 are in contact with the inner surfaces of the peripheral wall portions of the bobbin case 5 facing each other through the second notch 23. As a result, when the bobbin case 5 is mounted on the inner rack 3, the insertion of the bobbin case 5 into the inner rack 3 is guided, and the angular displacement between the bobbin case 5 and the inner rack 3 together with the latch mechanism 25 is prevented. .

ラッチ機構２５は、操作レバー２６と係合片２７とを含み、係合片２７が内かま３に形成された係合凹部２８に係合することによって、内かま３とボビンケース５との角変位が阻止されるとともに、内かま３に対してボビンケース５を係止して抜出しを防止し、かつボビン４の交換時には、ボビンケース５の内かま３への係止状態を解除して、ボビンケース５を内かま３から離脱させることができる。  The latch mechanism 25 includes an operation lever 26 and an engagement piece 27, and the engagement piece 27 engages with an engagement recess 28 formed in the inner hook 3, whereby the corner between the inner hook 3 and the bobbin case 5. The displacement is prevented, the bobbin case 5 is locked to the inner hook 3 to prevent the pulling out, and when the bobbin 4 is replaced, the locking state of the bobbin case 5 to the inner hook 3 is released, The bobbin case 5 can be detached from the inner hook 3.

このような垂直全回転かま１において、係合片２７は、ボビンケース５が内かま３に装着された状態で、係合凹部２８に嵌まり込んで係合する係合部２７ａと、係合部２７ａに連なる長手板状の基部２７ｂとを有し、略Ｌ字状に形成される。係合部２７ａは、係合凹部２８に、回転方向Ａに間隙をあけて着脱自在に係合する。フランジ部１５には、係合凹部２８に係合部２７ａが係合した状態で、係合部２７ａを回転方向Ａ上流側から回転方向Ａ下流側に向けてばね付勢するばね部材５０が設けられる。ばね部材５０は、前記間隙に配設される。  In such a vertical full rotation hook 1, the engagement piece 27 is engaged with an engagement portion 27 a that engages and engages with the engagement recess 28 in a state where the bobbin case 5 is mounted on the inner hook 3. It has a long plate-like base portion 27b continuous with the portion 27a, and is formed in a substantially L shape. The engagement portion 27a is detachably engaged with the engagement recess 28 with a gap in the rotation direction A. The flange portion 15 is provided with a spring member 50 that biases the engaging portion 27a from the upstream side in the rotational direction A toward the downstream side in the rotational direction A with the engaging portion 27a engaged with the engaging recess 28. It is done. The spring member 50 is disposed in the gap.

図７はばね部材５０付近の拡大断面図であり、図８は内かま３の側面図であり、図９はボビンケース５が装着された内かま３の側面図である。図１０は内かま３の背面図であり、図１１はボビンケース５が装着された内かま３の背面図である。前述のばね部材５０は、フランジ部１５の係合凹部２８よりも回転方向Ａ上流側に固定される長手板状の取付け部５１と、取付け部５１の長手方向の一端からほぼ直角に屈曲して係合凹部２８内に延び、回転方向Ａ下流側（図７の上方）に凸に湾曲して突出する突部５２とを有する。ばね部材５０は、たとえば厚さ０．１５ｍｍ程度のばね鋼板から成る板ばねである。  7 is an enlarged sectional view of the vicinity of the spring member 50, FIG. 8 is a side view of the inner hook 3, and FIG. 9 is a side view of the inner hook 3 to which the bobbin case 5 is attached. 10 is a rear view of the inner hook 3, and FIG. 11 is a rear view of the inner hook 3 to which the bobbin case 5 is attached. The aforementioned spring member 50 is bent at a substantially right angle from a longitudinal plate-shaped attachment portion 51 fixed to the upstream side in the rotational direction A with respect to the engagement recess 28 of the flange portion 15 and from one end in the longitudinal direction of the attachment portion 51. It has a protrusion 52 that extends into the engagement recess 28 and protrudes curvedly and protrudes downstream in the rotation direction A (upward in FIG. 7). The spring member 50 is a leaf spring made of a spring steel plate having a thickness of about 0.15 mm, for example.

取付け部５１をフランジ部１５に固定する手法としては、フランジ部１５に取付け部５１の長手方向に平行な軸線に対して、下軸８の軸線Ｌ２に垂直な仮想一平面上において、垂直な接線方向に延びる取付け溝５３を形成し、取付け溝５３に取付け部５１を嵌合させた状態で、両側部５４ａ、５４ｂを互いに近接する方向にかしめて取付け部５１が側部５４ａ、５４ｂによって狭着されるように変形させる、かしめ加工によって固定するようにしてもよい。  As a method of fixing the mounting portion 51 to the flange portion 15, a vertical tangent line on an imaginary plane perpendicular to the axis L <b> 2 of the lower shaft 8 with respect to an axis line parallel to the longitudinal direction of the mounting portion 51 on the flange portion 15. A mounting groove 53 extending in the direction is formed, and both the side parts 54a and 54b are caulked in a direction close to each other in a state where the mounting part 51 is fitted in the mounting groove 53, and the mounting part 51 is tightly attached by the side parts 54a and 54b It may be fixed by caulking, which is deformed as described above.

突部５２は、ボビンケース５の内かま３に対する着脱が容易なように、係合部２７ａの係合凹部２８への挿入方向（図７では右方）に向かって回転方向Ａ下流側に傾斜した第１部分５６と、最も回転方向Ａ下流側に位置するピーク部５７を経て、挿入方向に向かうにつれて回転方向Ａ上流側へ傾斜する第２部分５８とを有する。  The protrusion 52 is inclined toward the downstream side in the rotational direction A toward the insertion direction of the engagement portion 27a into the engagement recess 28 (rightward in FIG. 7) so that the bobbin case 5 can be easily attached to and detached from the inner hook 3. The first portion 56 and the second portion 58 that inclines toward the upstream side in the rotational direction A toward the insertion direction through the peak portion 57 positioned on the most downstream side in the rotational direction A.

このようなばね部材５０は、ボビンケース５を内かまに装着した状態では、係合凹部２８に係合部２７ａが係合し、ばね部材５０はピーク部５７が係合部２７ａに回転方向上流側から弾発的に当接して一定の押圧力で押圧されるので、縫製時にボビンケース５の内かま３に対する振動を抑制し、この振動に伴なう上糸および下糸の張力変化を阻止し、糸切れおよび糸玉の発生を防止することができる。  In such a spring member 50, in a state where the bobbin case 5 is mounted on the inner hook, the engaging portion 27 a is engaged with the engaging recess 28, and the peak portion 57 of the spring member 50 is upstream of the engaging portion 27 a in the rotational direction. Since it abuts elastically from the side and is pressed with a constant pressing force, the vibration of the bobbin case 5 with respect to the inner hook 3 is suppressed during sewing, and the tension change of the upper thread and lower thread associated with this vibration is prevented. In addition, thread breakage and yarn ball generation can be prevented.

図１２は本発明の他の実施形態の垂直全回転かま１ａに備えられる内かま３のばね部材５０ａ付近を示す拡大断面図であり、図１３はボビンケース５が装着された内かま３のばね部材５０ａ付近の拡大断面図である。なお、前述の実施形態と対応する部分には、同一の参照符を付し、重複する説明は省略する。  FIG. 12 is an enlarged cross-sectional view showing the vicinity of the spring member 50a of the inner hook 3 provided in the vertical full rotation hook 1a of another embodiment of the present invention, and FIG. 13 shows the spring of the inner hook 3 to which the bobbin case 5 is attached. It is an expanded sectional view near member 50a. Note that portions corresponding to those of the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

本実施形態の垂直全回転かま１ａは、外かま２と、内かま３と、ボビン４と、ボビンケース５と、ばね部材５０ａとを含んで構成される。本実施形態の垂直全回転かま１ａにおいて、ばね部材５０ａは、取付け部６１と、取付け６１の長手方向一端部に連なる略半円筒状の第１部分６２と、第１部分６２に連なり、ボビンケース５の挿入方向（図１２の右方）に向かって回転方向Ａ上流側に傾斜する第２部分６３とを有する。ばね部材５０ａは、たとえば厚さ０．１５ｍｍ程度のばね鋼板から成る板ばねである。取付け部６１は、リベット６４によって溝５３内でフランジ部１５に固定される。  The vertical full rotation hook 1a of this embodiment includes an outer hook 2, an inner hook 3, a bobbin 4, a bobbin case 5, and a spring member 50a. In the vertical full rotation hook 1a of the present embodiment, the spring member 50a is connected to the mounting portion 61, the first semi-cylindrical first portion 62 that is connected to one end in the longitudinal direction of the mounting 61, the first portion 62, and the bobbin case. 5 and a second portion 63 inclined toward the upstream side in the rotational direction A toward the insertion direction (rightward in FIG. 12). The spring member 50a is a leaf spring made of a spring steel plate having a thickness of about 0.15 mm, for example. The attachment portion 61 is fixed to the flange portion 15 in the groove 53 by a rivet 64.

このようなばね部材５０ａは、第２部分６３によって係合部２７ａを回転方向Ａ下流側に向けて押圧するとともに、ボビンケース５の挿入方向へも押圧するので、ボビンケース５の軸線Ｌ２まわりのがたつきおよび振動を抑制することができるとともに、軸線Ｌ２方向のがたつきおよび振動をも抑制することができ、これによって、糸切れおよび糸玉の発生をより確実に防止することがでる。  Such a spring member 50a presses the engaging portion 27a toward the downstream side in the rotational direction A by the second portion 63 and also presses the bobbin case 5 in the insertion direction. The rattling and vibration can be suppressed, and the shakiness and vibration in the direction of the axis L2 can also be suppressed. This can more reliably prevent yarn breakage and yarn ball generation.

図１４は本発明のさらに他の実施形態の垂直全回転かま１ｂに備えられる内かま３のばね部材５０ｂ付近の拡大断面図であり、図１５はボビンケース５が装着された内かま３のばね部材５０ｂ付近の拡大断面図である。なお、前述の実施形態と対応する部分には、同一の参照符を付し、重複する説明は省略する。  FIG. 14 is an enlarged cross-sectional view of the vicinity of the spring member 50b of the inner hook 3 provided in the vertical full rotation hook 1b according to still another embodiment of the present invention, and FIG. 15 shows the spring of the inner hook 3 to which the bobbin case 5 is attached. It is an expanded sectional view near member 50b. Note that portions corresponding to those of the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

本実施形態の垂直全回転かま１ｂは、外かま２と、内かま３ｂと、ボビン４と、ボビンケース５と、ばね部材５０ｂとを含んで構成される。本実施形態の垂直前回転かま１ｂにおいて、ばね部材５０ｂは、取付け部７１と、取付け部７１の長手方向一端部に直面よりも大きな角度で屈曲して連なり、係合凹部２８内に延びる第１部分７２と、第１部分７２に連なり、ボビンケース５の挿入方向下流側の端部寄りで回転方向Ａ下流側に凸に湾曲して突出する突部７３とを有する。ばね部材５０ｂは、たとえば厚さ０．１５ｍｍ程度のばね鋼板から成る板ばねである。取付け部７１は、フランジ部１５にリベット７４によって固定される。  The vertical full rotation hook 1b of the present embodiment includes an outer hook 2, an inner hook 3b, a bobbin 4, a bobbin case 5, and a spring member 50b. In the vertical front rotary hook 1b of the present embodiment, the spring member 50b is bent and connected to the attachment portion 71 at an angle larger than that of the attachment portion 71 in the longitudinal direction of the attachment portion 71, and extends into the engagement recess 28. It has a portion 72 and a projection 73 that is connected to the first portion 72 and protrudes in a convex manner toward the downstream side in the rotational direction A near the end of the bobbin case 5 on the downstream side in the insertion direction. The spring member 50b is a leaf spring made of a spring steel plate having a thickness of about 0.15 mm, for example. The attachment portion 71 is fixed to the flange portion 15 with a rivet 74.

このようなばね部材５０ｂを用いることによってもまた、前述の実施形態と同様に、上糸および下糸の張力変化を少なくして、糸切れおよび糸玉の発生を防止することができる。  Also by using such a spring member 50b, it is possible to reduce the change in the tension of the upper thread and the lower thread and prevent the occurrence of thread breakage and yarn balls, as in the above-described embodiment.

本発明は、その精神または主要な特徴から逸脱することなく、他のいろいろな形態で実施できる。したがって、前述の実施形態はあらゆる点で単なる例示に過ぎず、本発明の範囲は請求の範囲に示すものであって、明細書本文には何ら拘束されない。さらに、請求の範囲に属する変形や変更は全て本発明の範囲内のものである。  The present invention can be implemented in various other forms without departing from the spirit or main features thereof. Therefore, the above-described embodiment is merely an example in all points, and the scope of the present invention is shown in the scope of claims, and is not restricted by the text of the specification. Further, all modifications and changes belonging to the claims are within the scope of the present invention.

１，１ａ，１ｂ 垂直全回転かま
２ 外かま
３，内かま
４ ボビン
５，ボビンケース
６ 縫針
７ 針棒
８ 下軸
９ 剣先部
１０ 凹部
１１ 針落ち孔
１２ 周壁部
１３ 底部
１４ スタッド
１５ フランジ部
１６ 軌条
１７ 内周部
２１ 下糸
２２ 切欠き
２３ 切欠き
２４ 突部
２５ ラッチ機構
２６ 操作レバー
２７ 係合片
２８ 係合凹部
３３ 糸調子ばね
３５ 下糸案内溝
３６ 針穴
５０ ５０ａ，５０ｂ ばね部材
５１，６１，７１ 取付け部
５２，５７，７３ 突部
５３ 取り付け溝
５４ａ，５４ｂ 側部
５６，６２，７２ 第１部分
５８，６３ 第２部分DESCRIPTION OF SYMBOLS 1,1a, 1b Vertical full rotation hook 2 Outer hook 3, Inner hook 4 Bobbin 5, Bobbin case 6 Sewing needle 7 Needle bar 8 Lower shaft 9 Blade tip part 10 Recessed part 11 Needle drop hole 12 Peripheral wall part 13 Bottom part 14 Stud 15 Flange part 16 Rail 17 Inner circumference 21 Lower thread 22 Notch 23 Notch 24 Projection 25 Latch mechanism 26 Operation lever 27 Engagement piece 28 Engaging recess 33 Thread tension spring 35 Lower thread guide groove 36 Needle hole 50 50a, 50b Spring member 51 , 61, 71 Mounting portion 52, 57, 73 Protruding portion 53 Mounting groove 54a, 54b Side portion 56, 62, 72 First portion 58, 63 Second portion

Claims (3)

縫針が取付けられる針棒の軸線に垂直な回転軸線まわりに回転駆動される下軸に固定され、前記下軸の回転方向の下流側に先端部を向けて先細状となる剣先部を有する外かまと、
前記外かまに、前記回転軸線まわりに回転自在に保持される内かまであって、前記縫針が挿通する針落ち孔が形成される円筒状の周壁部と、前記周壁部の一端部から半径方向外方に延びるフランジ部とを有し、前記周壁部と前記フランジ部とにわたって係合凹部が設けられる内かまと、
前記内かまに着脱自在に装着されるボビンケースであって、前記係合凹部に前記回転方向に間隙をあけて着脱自在に係合する長手板状の係合片を有するボビンケースと、
前記係合凹部に前記係合片が係合した状態で、前記間隙に配設されるばね部材と、
前記ボビンケースに収容され、下糸が巻回されるボビンと、を含み、
前記ばね部材は、前記内かまのフランジ部に設けられ、前記係合片が前記係合凹部に前記回転方向下流側から支持された状態で、前記係合片を前記回転方向上流側から前記回転方向下流側に向けてばね付勢することを特徴とする垂直全回転かま。 An outer bite that is fixed to a lower shaft that is driven to rotate about a rotation axis perpendicular to the axis of the needle bar to which the sewing needle is attached, and has a sword tip that tapers toward the downstream side in the rotation direction of the lower shaft. When,
A cylindrical peripheral wall portion in which a needle drop hole through which the sewing needle is inserted is formed in the outer hook, being rotatably held around the rotation axis, and a radial direction from one end portion of the peripheral wall portion A flange portion extending outward, and an inner hook provided with an engagement recess across the peripheral wall portion and the flange portion;
A bobbin case detachably mounted on the inner hook, the bobbin case having a longitudinal plate-like engagement piece that is detachably engaged with the engagement recess with a gap in the rotation direction;
In a state in which the engaging piece is engaged prior to Kigakarigo recess, and a spring member disposed in said gap,
Wherein is housed in the bobbin case, see contains a bobbin lower thread is wound, and
The spring member is provided on the flange portion of the inner rotary hook, and the engagement piece is rotated from the upstream side in the rotational direction with the engagement piece supported by the engagement recess from the downstream side in the rotational direction. A vertical full-rotation rotary hook characterized by spring-biasing toward the downstream side . 前記ばね部材は、板ばねであることを特徴とする請求項１に記載の垂直全回転かま。    The vertical full rotation hook according to claim 1, wherein the spring member is a leaf spring. 前記板ばねは、前記フランジ部の前記係合凹部よりも前記回転方向の上流側に固定される長手板状の取付け部と、前記取付け部の長手方向一端から前記間隙内に延び、前記回転方向の下流側に突出する突部とを有することを特徴とする請求項２に記載の垂直全回転かま。    The leaf spring includes a longitudinal plate-shaped attachment portion fixed to the upstream side in the rotation direction with respect to the engagement recess of the flange portion, and extends into the gap from one longitudinal end of the attachment portion, and the rotation direction The vertical full-rotation rotary hook according to claim 2, further comprising a protrusion projecting downstream of the first rotary rotary hook.
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JP7369439B2 (en) 2019-10-16 2023-10-26 株式会社 神崎高級工機製作所 Reduction/reversing machine

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JP7369438B2 (en) 2019-10-02 2023-10-26 株式会社 神崎高級工機製作所 Reduction/reversing machine
JP7369439B2 (en) 2019-10-16 2023-10-26 株式会社 神崎高級工機製作所 Reduction/reversing machine

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JPWO2016129122A1 (en) 2017-11-30
EP3257992B1 (en) 2023-04-05
KR20170065627A (en) 2017-06-13
KR101962264B1 (en) 2019-03-26
EP3257992A1 (en) 2017-12-20
CN107109747B (en) 2019-08-13
CN107109747A (en) 2017-08-29
EP3257992A4 (en) 2018-07-04
WO2016129122A1 (en) 2016-08-18

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