JP4808277B2 - Automatic thread trimming machine - Google Patents

Automatic thread trimming machine Download PDF

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JP4808277B2
JP4808277B2 JP2010045391A JP2010045391A JP4808277B2 JP 4808277 B2 JP4808277 B2 JP 4808277B2 JP 2010045391 A JP2010045391 A JP 2010045391A JP 2010045391 A JP2010045391 A JP 2010045391A JP 4808277 B2 JP4808277 B2 JP 4808277B2
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cam
sewing machine
driver
core shaft
curved surface
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昆忠 葉
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啓翔股▲ふん▼有限公司
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D05B65/02—Devices for severing the needle or lower thread controlled by the sewing mechanisms

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Description

本発明はミシンの自動糸切り装置に関し、特に水平回転シャトルロックステッチミシンの自動糸切り装置に関する。   The present invention relates to an automatic thread trimmer for a sewing machine, and more particularly to an automatic thread trimmer for a horizontal rotary shuttle lock stitch sewing machine.

従来のロックステッチミシンは、特許文献１に示すように、糸切りメス駆動器を備え、位置保証装置を係合位置から釈放位置まで駆動し、こうして糸切りメスは釈放位置において回転することができ、これにより、糸切りメスは初期位置から糸調子位置へと移動する。位置保証装置内には、偏向回転機構を設置する。偏向回転機構は、可動スイング棒を備え、可動スイング棒は、閉鎖棒を接続する。閉鎖棒と糸切りメス駆動器の持ち上げ柱スタッフは、スライド連接し、閉鎖棒と可動スイング棒は、位置保証装置の係合位置において、偏向圧力バネの圧力を受ける。糸切りメスは糸調子位置まで回転すると、糸切りメス駆動器を動かし、持ち上げ柱スタッフは移動し、閉鎖棒と可動スイング棒を押し、釈放位置まで偏向回転させる。   As shown in Patent Document 1, the conventional lock stitch sewing machine is provided with a thread trimming knife driving device, and drives the position assurance device from the engagement position to the release position, so that the thread trimming knife can rotate in the release position. Thereby, the thread trimming knife moves from the initial position to the thread tension position. A deflection rotation mechanism is installed in the position assurance device. The deflection rotation mechanism includes a movable swing bar, and the movable swing bar connects the closing bar. The lifting pole staff of the closing bar and the thread trimming knife driver are slidably connected, and the closing bar and the movable swing bar are subjected to the pressure of the deflection pressure spring at the engagement position of the position assurance device. When the thread trimmer rotates to the thread tension position, the thread trimmer driver is moved, the lifting column staff moves, pushes the closing bar and the movable swing bar, and deflects and rotates to the release position.

しかし上記した従来の構造においては、糸切りメス駆動器が、可動スイング棒と閉鎖棒により組成する偏向回転機構を駆動し偏向回転させ、しかも偏向圧力バネを推し、その弾力を釈放するため、より大きな推進力が必要である。よって、この糸切り装置は、複雑で不安定である。しかも、より大きな推進力を必要とする糸切りメス駆動器は体積が大きくならざるを得ず、全体的な体積を縮小することができず、さらに糸切りメス駆動器は出力時に衝突音を発生する。
さらに、偏向回転機構などの連棒機構により、糸切りメスの回転を連動するため、その作動を司る電磁石は、偏向圧力バネの阻害力を克服しなければならず、そうしなければ、糸切りメスが初期位置から極限位置まで回転した後に、戻って来るよう確保することはできない。糸切りメスが初期位置から極限位置まで回転した後に、戻って来るよう確保できなければ、下糸と上糸は、糸切りメスの糸調子槽中にスムーズに入れず、こうして糸切りメスは初期位置に戻った時に糸を切ることになるため、糸切り効率が悪い。 However, in the above-described conventional structure, the thread trimming knife driver drives and deflects and rotates the deflection rotation mechanism composed of the movable swing bar and the closing bar, and further pushes the deflection pressure spring and releases its elasticity. A big driving force is necessary. Therefore, this thread trimming device is complicated and unstable. In addition, the thread trimming knife driver that requires a larger thrust must be larger in volume, and the overall volume cannot be reduced, and the thread trimming knife driver generates a collision sound during output. To do.
Furthermore, in order to interlock the rotation of the thread trimmer with a connecting rod mechanism such as a deflection rotation mechanism, the electromagnet that controls the operation must overcome the obstruction of the deflection pressure spring, otherwise the thread trimmer will It cannot be ensured that the knife returns after it has been rotated from the initial position to the extreme position. If the thread trimmer rotates from the initial position to the extreme position and cannot be secured to return, the lower thread and upper thread will not smoothly enter the thread tension tank of the thread trimmer, and the thread trimmer will Since the thread is cut when it returns to the position, the thread cutting efficiency is poor.

中華人民共和国特許第２００７１０１０４４５８．１号明細書The specification of the People's Republic of China 200710104458.1

本発明の主要な目的は、駆動器を可動メスのピボットのスイングアーム上に直接設置するため、駆動器の芯軸を利用し、カムユニットと直接接触させ、カムユニットの曲面変化により、芯軸を押して動かし、同時にスイングアーム、ピボット、可動メスの回転を駆動するため、従来の技術が採用する偏向回転連棒機構と偏向圧力バネを省くことができ、これにより装置全体を簡単にし、構造を堅固にし、糸切りの安定性を高めることができるミシンの自動糸切り装置を提供することである。   The main object of the present invention is to install the driver directly on the swing arm of the pivot of the movable knife, so that the core shaft of the driver is used and brought into direct contact with the cam unit. Since the rotation of the swing arm, pivot, and movable knife is driven at the same time, the deflection rotating bar mechanism and deflection pressure spring adopted by the conventional technology can be omitted. It is an object of the present invention to provide an automatic thread trimming device for a sewing machine that can be solidified and increase the stability of thread trimming.

本発明の次の目的は、カムユニットの復位カムは、糸切りサイクル終了時に、駆動器の芯軸を押して復位させることができるため、従来の技術が採用する駆動器を復位させる偏向圧力バネを省くことができ、よって駆動器の芯軸が伸び出る時にも何らの抵抗を受けることがなく、そのため推進力が小さく、体積も小さい駆動器を用いて伝動可能で、これにより駆動器は明確な衝突音の発生を回避することができるミシンの自動糸切り装置を提供することである。   The next object of the present invention is to provide a deflecting pressure spring for reversing the driver employed in the prior art because the reversing cam of the cam unit can be reciprocated by pushing the core shaft of the driver at the end of the thread trimming cycle. It can be omitted, so it does not receive any resistance when the core shaft of the driver is extended, so it can be transmitted using a driver with a small thrust and a small volume, which makes the driver clear It is an object to provide an automatic thread trimming device for a sewing machine that can avoid occurrence of a collision sound.

本発明のもう一つの目的は、カムユニットの位置制限カムは、糸切りサイクルの初期において、駆動器の芯軸先端位置を制限することで、可動メスを連動し、初期位置から糸掛かり位置まで回転させるため、可動メスは確実に極限位置まで回転した後に戻り、糸掛かり動作を確実にし、糸切り効率を向上させることができるミシンの自動糸切り装置を提供することである。   Another object of the present invention is that the position limiting cam of the cam unit limits the position of the front end of the core shaft of the driver at the initial stage of the thread trimming cycle, interlocking the movable knife, and from the initial position to the thread catching position. In order to rotate, the movable knife is surely rotated to the limit position and then returned to provide an automatic thread trimming device for a sewing machine capable of ensuring the yarn catching operation and improving the thread trimming efficiency.

上述の目的を達成するため、本発明は下記のミシンの自動糸切り装置を提供する。
ミシンの自動糸切り装置は、回転シャトル台、伝動軸、カムユニット、可動メスを備え、
回転シャトル台上には、固定メスを固定し、
該伝動軸は、回転シャトル台中に設置し、
該カムユニットは、伝動軸上に設置し、該伝動軸と同期回転し、該カムユニットは、軸方向カム、位置制限カム、復位カムを備え、該軸方向カムと該位置制限カムの隣接する面には、偏向回転曲面をそれぞれ形成し、しかも２個の偏向回転曲面の間には、導引槽を形成し、該軸方向カムは、該偏向回転曲面に隣接する回転曲面を備え、該復位カムは、径方向に復位曲面を形成し、
該可動メスは、ピボットを経て、該回転シャトル台上に可動設置し、ピボット下方には、スイングアームを備え、スイングアーム上には、駆動器を設置し、該駆動器は、該カムユニットへと径方向に可動伸縮する芯軸を備え、
該可動メスが、該固定メスと相互に接続する初期位置から、糸掛かり位置まで回転するために、該駆動器は、該芯軸を、該カムユニット方向へと伸び出させ、該芯軸は該導引槽に進入し、該導引槽は、該芯軸を押し、該伝動軸の軸方向に沿って移動させ偏向させ、これにより該スイングアーム及び該ピボットは回転し、該可動メスを駆動し、初期位置から、糸掛かり位置まで回転させ、
続いて、該軸方向カムの回転曲面が芯軸の先端を初期位置まで押し戻すため、該スイングアーム及び該ピボットは反対方向へと回転し、前記スイングアーム及び前記ピボットの回転に該可動メスが連動して反対方向へ回転して復位し、該固定メスと可動メスとが相互に接続して糸切り操作を完成し、
該芯軸の端面は、該復位カムの復位曲面により押され、収縮し、復位し、こうして糸切りのサイクルを完成する。 In order to achieve the above-mentioned object, the present invention provides the following automatic thread trimming device for a sewing machine.
The automatic thread trimmer of the sewing machine is equipped with a rotary shuttle base, a transmission shaft, a cam unit, and a movable knife.
A fixed knife is fixed on the rotary shuttle stand,
The transmission shaft is installed in a rotary shuttle stand,
The cam unit is installed on a transmission shaft and rotates synchronously with the transmission shaft. The cam unit includes an axial cam, a position limiting cam, and a return cam, and the axial cam and the position limiting cam are adjacent to each other. A deflection rotation curved surface is formed on each surface, and a guiding tank is formed between the two deflection rotation curved surfaces, and the axial cam has a rotation curved surface adjacent to the deflection rotation curved surface, The return cam forms a return curved surface in the radial direction,
The movable knife is movably installed on the rotary shuttle table via a pivot. A swing arm is provided below the pivot, and a driver is installed on the swing arm. The driver is connected to the cam unit. And a core shaft that expands and contracts in the radial direction,
Movable knife, from the initial position to interconnect with said fixed knife, in order to rotate to a yarn consuming position, the driver has the core shaft causes Desa extends into the cam unit direction, the core axis The guide tank enters the guide tank, and the guide tank pushes the core shaft and moves and deflects it along the axial direction of the transmission shaft, whereby the swing arm and the pivot rotate, and the movable knife is moved. Drive, rotate from the initial position to the thread hook position,
Subsequently, the rotation curved surface in the axial direction the cam pushes back the tip of the core shaft to the initial position, the swing arm and the pivot is rotated in the opposite direction, the swing arm and the movable knife with the rotation of the pivot and repositioned in the opposite direction rotation to conjunction with, completing the thread cutting operation and the fixed knife and a movable knife is interconnected,
The end face of the core shaft is pushed by the return curved surface of the return cam, contracts and returns, thus completing the thread trimming cycle.

本発明は、構造が簡単で堅固であるため、糸切りの安定性を高めることができ、駆動器が伝動のために必要な推進力は大きくないため、コンパクトな駆動器を採用可能で、よって全体の体積を縮小可能である。   Since the present invention is simple and robust in structure, it can improve the stability of thread trimming, and the driving force required for the transmission is not large, so a compact driving device can be adopted, The entire volume can be reduced.

本発明自動糸切り装置のミシン上における位置概略図である。It is the position schematic on the sewing machine of this invention automatic thread trimming apparatus. 本発明ミシンの自動糸切り装置を図１のａ１方向から見た俯瞰図である。It is the bird's-eye view which looked at the automatic thread trimming device of this invention sewing machine from the a1 direction of FIG. 本発明の立体図である。It is a three-dimensional view of the present invention. 本発明ミシンの自動糸切り装置を図１のａ２方向から見た俯瞰図である。It is the bird's-eye view which looked at the automatic thread trimming device of this invention sewing machine from the a2 direction of FIG. 本発明カムユニットの平面概略図（一）である。It is a plane schematic diagram (1) of the cam unit of the present invention. 本発明カムユニットの平面概略図（二）である。It is a plane schematic diagram (2) of this invention cam unit. 本発明ミシンの自動糸切り装置において、スタート状態における糸切り動作の概略図（一）である。In the automatic thread trimming device of the sewing machine of the present invention, FIG. 本発明ミシンの自動糸切り装置において、糸切り動作の概略図（二）である。FIG. 6 is a schematic diagram (2) of the thread trimming operation in the automatic thread trimming device of the sewing machine of the present invention. 本発明ミシンの自動糸切り装置において、糸切り動作の概略図（三）である。FIG. 6 is a schematic diagram (3) of the thread trimming operation in the automatic thread trimming device of the sewing machine of the present invention. 本発明ミシンの自動糸切り装置を図１のａ３方向から見た俯瞰図である。It is the bird's-eye view which looked at the automatic thread trimming device of this invention sewing machine from the a3 direction of FIG. 本発明の図１０中ｆ１−ｆ’１における断面概略図である。FIG. 11 is a schematic cross-sectional view taken along f1-f′1 in FIG. 10 of the present invention. 本発明の図１０中ｆ２−ｆ’２における断面概略図である。FIG. 11 is a schematic sectional view taken along line f2-f′2 of FIG. 10 according to the present invention. 本発明の図１０中ｆ３−ｆ’３における断面概略図である。FIG. 11 is a schematic sectional view taken along line f3-f′3 in FIG. 10 according to the present invention.

本発明自動糸切り装置のミシン上における位置概略図である図１、本発明ミシンの自動糸切り装置を図１のａ１方向から見た俯瞰図である図２、本発明の立体図である図３に示すように、本発明ミシンの自動糸切り装置は、回転シャトル台１を備える。回転シャトル台１は、基板６上に設置する。回転シャトル台１上には、伝動軸２を設置する。伝動軸２は、伝動連動装置（図示なし）を経由し、ミシンアーム部７内に位置する上軸７０に接続される。伝動軸２は、回転シャトル台１中に位置する１組のギア伝動装置（図示なし）により、回転シャトル台１上に設置する回転シャトル１１の回転を駆動する。回転シャトル１１の片側には、固定メス１２を設置し、しかも固定メス１２は、回転シャトル台１上に固定する。   FIG. 1 is a schematic view of the position of the automatic thread trimmer on the sewing machine according to the present invention, FIG. 2 is an overhead view of the automatic thread trimmer of the present sewing machine as viewed from the direction a1, and FIG. As shown in FIG. 3, the automatic thread trimmer for the sewing machine of the present invention includes a rotary shuttle platform 1. The rotary shuttle base 1 is installed on the substrate 6. A transmission shaft 2 is installed on the rotary shuttle base 1. The transmission shaft 2 is connected to an upper shaft 70 located in the sewing machine arm portion 7 via a transmission interlocking device (not shown). The transmission shaft 2 drives the rotation of the rotary shuttle 11 installed on the rotary shuttle table 1 by a set of gear transmissions (not shown) located in the rotary shuttle table 1. A fixed knife 12 is installed on one side of the rotary shuttle 11, and the fixed knife 12 is fixed on the rotary shuttle stand 1.

糸切り装置は、可動メス３を備える。可動メス３は、回転シャトル１１の反対側に回転可能状態で設置する。可動メス３は、回転シャトル台１中に可動設置するピボット３１上に固定する。可動メス３は、ピボット３１の回転に従い、固定メス１２と相互に接続する初期位置(図２参照)から糸掛かり位置まで回転し、反対方向に回転し復位し、固定メス１２と相互に接続し糸切り動作を完成する。   The thread trimming device includes a movable knife 3. The movable knife 3 is installed on the opposite side of the rotary shuttle 11 in a rotatable state. The movable knife 3 is fixed on a pivot 31 movably installed in the rotary shuttle platform 1. The movable knife 3 rotates from the initial position (see FIG. 2) mutually connected to the fixed knife 12 to the thread catching position according to the rotation of the pivot 31, rotates in the opposite direction, and returns, and is connected to the fixed knife 12. Complete the thread trimming operation.

図４、５、６に示すように、伝動軸２上には、同期回転を行なうカムユニット４を設置する。カムユニット４は、軸方向カム４１、位置制限カム４２、復位カム４３を備える。軸方向カム４１と位置制限カム４２の隣接する面には、偏向回転曲面４１０、４２０をそれぞれ備え、しかも２個の偏向回転曲面４１０、４２０の間には、曲線状の導引槽４４を形成する。位置制限カム４２は、扇型を呈する。軸方向カム４１は、偏向回転曲面４１０に隣接する回転曲面４１１を備える。復位カム４３は、回転曲面４１１の側辺に位置し、復位曲面４３０、及び復位曲面４３０と相互に接続する譲位曲面４３１を径方向に形成する。譲位曲面４３１は、導引槽４４に隣接する（図７、８参照）。   As shown in FIGS. 4, 5, and 6, a cam unit 4 that performs synchronous rotation is installed on the transmission shaft 2. The cam unit 4 includes an axial cam 41, a position limiting cam 42, and a return cam 43. The adjacent surfaces of the axial cam 41 and the position limiting cam 42 are provided with deflection rotation curved surfaces 410 and 420, respectively, and a curved guiding tank 44 is formed between the two deflection rotation curved surfaces 410 and 420. To do. The position limiting cam 42 has a fan shape. The axial cam 41 includes a rotating curved surface 411 adjacent to the deflection rotating curved surface 410. The restoring cam 43 is positioned on the side of the rotating curved surface 411 and forms a restoring curved surface 430 and a yielding curved surface 431 interconnecting with the restoring curved surface 430 in the radial direction. The yield surface 431 is adjacent to the guiding tank 44 (see FIGS. 7 and 8).

可動メス３を設置するピボット３１下方には、スイングアーム３２を備え、スイングアーム３２上には、駆動器５を設置する。駆動器５は、カムユニット４において、径方向に可動伸縮する芯軸５０を備える。駆動器５は、電磁石で、芯軸５０先端には、ローラー５１を設置する。電磁石に通電すると、芯軸５０は、カムユニット４の方向へと伸び出す。   A swing arm 32 is provided below the pivot 31 on which the movable knife 3 is installed, and the driver 5 is installed on the swing arm 32. The drive unit 5 includes a core shaft 50 that is movable in the radial direction in the cam unit 4. The driver 5 is an electromagnet, and a roller 51 is installed at the tip of the core shaft 50. When the electromagnet is energized, the core shaft 50 extends in the direction of the cam unit 4.

次に糸切り装置の通常の縫製状態である初期状態を掲示する図７に示すように、カムユニット４は、伝動軸２の連続回転に従い、ローラー５１とカムユニット４とは接触せず、可動メス３は、固定メス１２と相互に接続する初期位置に位置する。縫製が終了し糸を切ろうとする場合には、可動メス３は、糸を捕らえることができる回転し糸掛かり位置まで回転する必要がある。この時、駆動器５は、ミシンコントローラーが、伝動軸２が適当な角度位置まで回転した時に対応して発する信号を受け取り、芯軸５０は、カムユニット４の方向へと伸び出る。
次に、図８に示すように、伝動軸２の矢印方向に沿った回転に従い、芯軸５０先端のローラーは、復位カム４３の譲位曲面４３１に沿って、導引槽４４まで前進する。導引槽４４は、伝動軸２の回転に従い、ローラー５１に対して、伝動軸２の軸方向に沿った推進力を形成し、スイングアーム３２とピボット３１を押し、軸線Ｙを巡り回転させる。同時に、可動メス３を連動し、軸線Ｙを巡り回転させ、固定メス１２と相互に接続する初期位置から、矢印方向に沿って、糸掛かり位置まで回転し、糸掛け準備動作を完成する（図９参照）。
続いて、伝動軸２の継続回転に従い、ローラー５１が位置制限カム４２を離れると、軸方向カム４１の回転曲面４１１は反対方 向の軸方向の推進力を生じるため、芯軸５０は初期位置まで押し戻される。同時に、スイングアーム３２とピボット３１は、軸線Ｙを巡り反対方向に回転し、可動メス３を連動し、反対に回転させ、糸掛けを行い、復位し、固定メス１２と糸切り動作を完成する。さらに、芯軸５０は、復位カム４３の復位曲面４３０に押し動かされ、徐々に収縮し復位する（図７参照）。 Next, as shown in FIG. 7 which shows an initial state that is a normal sewing state of the thread trimming device, the cam unit 4 is movable without being in contact with the roller 51 and the cam unit 4 according to the continuous rotation of the transmission shaft 2. The knife 3 is located at an initial position where the knife 3 is connected to the fixed knife 12. When the sewing is finished and the thread is to be cut, the movable knife 3 needs to rotate to the thread catch position where it can catch the thread. At this time, the driver 5 receives a signal generated when the sewing machine controller rotates the transmission shaft 2 to an appropriate angular position, and the core shaft 50 extends toward the cam unit 4.
Next, as shown in FIG. 8, the roller at the tip of the core shaft 50 moves forward to the guiding tank 44 along the transfer curved surface 431 of the return cam 43 according to the rotation of the transmission shaft 2 along the arrow direction. The guide tank 44 forms a propulsive force along the axial direction of the transmission shaft 2 with respect to the roller 51 according to the rotation of the transmission shaft 2, pushes the swing arm 32 and the pivot 31, and rotates around the axis Y. At the same time, the movable knife 3 is interlocked, rotated around the axis Y, and rotated from the initial position where it is mutually connected to the fixed knife 12 to the yarn hooking position along the arrow direction to complete the yarn hooking preparation operation (see FIG. 9).
Subsequently, when the roller 51 leaves the position limiting cam 42 according to the continuous rotation of the transmission shaft 2, the rotational curved surface 411 of the axial cam 41 generates an axial propulsive force in the opposite direction. Pushed back. At the same time, the swing arm 32 and the pivot 31 are rotated in the opposite direction around the axis Y, the movable knife 3 is interlocked and rotated in the opposite direction, the thread is hooked and returned, and the thread cutting operation with the fixed knife 12 is completed. . Further, the core shaft 50 is pushed and moved by the restoring curved surface 430 of the restoring cam 43, and gradually contracts and returns (see FIG. 7).

本発明は、駆動器５をスイングアーム３２上に直接設置し、駆動器５の芯軸５０により、カムユニット４と直接接触させる。カムユニット４曲面の変化により、スイングアーム３２を押して回転させ、こうして可動メス３の回転を駆動するため、その構造は簡単で、堅固で、糸切りの安定性を向上させることができる。しかも、駆動器５の芯軸５０が伸び出る時には、一切の抵抗を受けないため、指定位置まで簡単に到達することができる。つまり、駆動器５は大きな推進力を必要としないため、より小さな電磁石で実施可能で、よって全体的な体積を縮小することができる。   In the present invention, the driver 5 is directly installed on the swing arm 32 and is brought into direct contact with the cam unit 4 by the core shaft 50 of the driver 5. Since the swing arm 32 is pushed and rotated by the change of the curved surface of the cam unit 4 and thus the rotation of the movable knife 3 is driven, the structure is simple and solid, and the stability of thread trimming can be improved. In addition, when the core shaft 50 of the driver 5 extends, it does not receive any resistance, so that it can easily reach the designated position. That is, since the driver 5 does not require a large driving force, it can be implemented with a smaller electromagnet, and thus the overall volume can be reduced.

本発明ミシンの自動糸切り装置を図１のａ３方向から見た俯瞰図である図１０、本発明の図１０中ｆ１−ｆ’１における断面概略図である図１１、本発明の図１０中ｆ２−ｆ’２における断面概略図である図１２に示すように、本発明は回転シャトル台１中に、可動メス３を安定させる装置を設置することができる。ピボット３１上に開口槽３１０を設置し、回転シャトル台１はピボット３１の径方向上に開孔を設置する。開孔中には、定位ネジ１３を螺合し、定位ネジ１３内には、バネ１４を設置する。バネ１４先端には、スチールボール１５を設置し、スチールボール１５は開口槽３１０に接触して固定する。定位ネジ１３は、一定の圧力をピボット３１の開口槽３１０に加えるため、可動メス３を初期位置において安定させることができる。   FIG. 10 is an overhead view of the automatic thread trimming device of the sewing machine of the present invention viewed from the direction a3 in FIG. 1, FIG. 11 is a schematic sectional view taken along f1-f′1 in FIG. 10 of the present invention, and FIG. As shown in FIG. 12, which is a schematic cross-sectional view at f 2 -f ′ 2, the present invention can install a device for stabilizing the movable knife 3 in the rotary shuttle stand 1. An opening tub 310 is installed on the pivot 31, and the rotary shuttle platform 1 has an opening on the radial direction of the pivot 31. A stereotactic screw 13 is screwed into the hole, and a spring 14 is installed in the stereotactic screw 13. A steel ball 15 is installed at the tip of the spring 14, and the steel ball 15 contacts and is fixed to the opening tank 310. Since the fixed screw 13 applies a constant pressure to the opening tank 310 of the pivot 31, the movable knife 3 can be stabilized at the initial position.

本発明の図１０中ｆ３−ｆ’３における断面概略図である図１３に示すように、本発明はスイングアーム３２中に、駆動器５芯軸５０を安定させる装置を設置することができる。駆動器５芯軸５０には、環状の弧状槽５０１を設置し、スイングアーム３２は、駆動器５芯軸５０の径方向に開孔を設置する。開孔内には、弧状槽５０１に接触して固定するスチールボール３２０とバネ３２１を設置する。バネ３２１の外側は、定位ネジ３２２により、開孔内に螺入され、固定される。定位ネジ３２２は、一定の圧力を、芯軸５０上の弧状槽５０１に加えるため、駆動器５芯軸５０を初期位置において安定させることができる。   As shown in FIG. 13 which is a schematic cross-sectional view taken along line f3-f′3 in FIG. 10 of the present invention, the present invention can install a device for stabilizing the driver 5-core shaft 50 in the swing arm 32. An annular arc-shaped tank 501 is installed in the driver 5-core shaft 50, and the swing arm 32 is provided with an opening in the radial direction of the driver 5-core shaft 50. In the opening, a steel ball 320 and a spring 321 that are fixed in contact with the arc-shaped tank 501 are installed. The outside of the spring 321 is screwed into the opening with a stereotactic screw 322 and fixed. Since the fixed screw 322 applies a constant pressure to the arc-shaped tank 501 on the core shaft 50, the driver 5-core shaft 50 can be stabilized at the initial position.

１： 回転シャトル台、１１： 回転シャトル、１２： 固定メス、１３： 定位ネジ、１４： バネ、１５： スチールボール、２： 伝動軸、３： 可動メス、３１： ピボット、３１０： 開口槽、３２： スイングアーム、３２０： スチールボール、３２１： バネ、３２２： 定位ネジ、４： カムユニット、４１： 軸方向カム、４１０： 偏向回転曲面、４１１： 回転曲面、４２： 位置制限カム、４２０： 偏向回転曲面、４３： 復位カム、４３０： 復位曲面、４３１： 譲位曲面、４４： 導引槽、５： 駆動器、５０： 芯軸、５０１： 弧状槽、５１： ローラー、６： 基板、７： アーム部、７１： 上軸   1: rotating shuttle base, 11: rotating shuttle, 12: fixed knife, 13: stereotactic screw, 14: spring, 15: steel ball, 2: transmission shaft, 3: movable knife, 31: pivot, 310: open tank, 32 : Swing arm, 320: Steel ball, 321: Spring, 322: Fixing screw, 4: Cam unit, 41: Axial cam, 410: Deflection rotation curved surface, 411: Rotation curved surface, 42: Position limit cam, 420: Deflection rotation Curved surface, 43: Deformation cam, 430: Deformation curved surface, 431: Deferred curved surface, 44: Guide tank, 5: Driver, 50: Core shaft, 501: Arc tank, 51: Roller, 6: Substrate, 7: Arm 71: Upper shaft

Claims (7)

回転シャトル台、伝動軸、カムユニット、可動メスを備え、
回転シャトル台上には、固定メスを固定し、
前記伝動軸は、回転シャトル台中に設置し、
前記カムユニットは、伝動軸上に設置し、前記伝動軸と同期回転し、前記カムユニットは、軸方向カム、位置制限カム、復位カムを備え、前記軸方向カムと前記位置制限カムの隣接する面には、偏向回転曲面をそれぞれ形成し、しかも２個の偏向回転曲面の間には、導引槽を形成し、前記軸方向カムは、前記偏向回転曲面に隣接する回転曲面を備え、前記復位カムは、径方向に復位曲面を形成し、
前記可動メスは、ピボットを経て、前記回転シャトル台上に可動設置し、ピボット下方には、スイングアームを備え、スイングアーム上には、駆動器を設置し、前記駆動器は、前記カムユニットへと径方向に可動伸縮する芯軸を備え、
前記可動メスが、前記固定メスと相互に接続する初期位置から、糸掛かり位置まで回転するために、前記駆動器は、前記芯軸を、前記カムユニット方向へと伸び出させ、前記芯軸は前記導引槽に進入し、前記導引槽は、前記芯軸を押し、前記伝動軸の軸方向に沿って移動させ偏向させ、これにより前記スイングアーム及び前記ピボットは回転し、前記可動メスを駆動し、初期位置から、糸掛かり位置まで回転させ、
前記軸方向カムの回転曲面が前記芯軸の先端を初期位置まで押し戻すため、前記スイングアーム及び前記ピボットは反対方向へと回転し、前記スイングアーム及び前記ピボットの回転に前記可動メスが連動して反対方向へ回転して復位し、前記固定メスと前記可動メスとが相互に接続して糸切り操作を完成し、
前記芯軸は、前記復位カムの復位曲面により押され、収縮し、復位することを特徴とするミシンの自動糸切り装置。 Equipped with rotary shuttle base, transmission shaft, cam unit, movable knife,
A fixed knife is fixed on the rotary shuttle stand,
The transmission shaft is installed in a rotary shuttle stand,
The cam unit is installed on a transmission shaft and rotates synchronously with the transmission shaft. The cam unit includes an axial cam, a position limiting cam, and a return cam, and the axial cam and the position limiting cam are adjacent to each other. A deflection rotation curved surface is formed on each surface, and a guiding tank is formed between the two deflection rotation curved surfaces, and the axial cam includes a rotation curved surface adjacent to the deflection rotation curved surface, The return cam forms a return curved surface in the radial direction,
The movable knife is movably installed on the rotary shuttle table via a pivot, and has a swing arm below the pivot, a driver is installed on the swing arm, and the driver is connected to the cam unit. And a core shaft that expands and contracts in the radial direction,
It said movable knife, from the initial position to interconnect with the fixed knife, in order to rotate to a yarn consuming position, the driver has the core shaft causes Desa extends into the cam unit direction, wherein the core shaft is The guide tank enters the guide tank, and the guide tank pushes the core shaft and moves and deflects it along the axial direction of the transmission shaft, whereby the swing arm and the pivot rotate, and the movable knife is moved. Drive, rotate from the initial position to the thread hook position,
Since the rotation curved surface of the axial cam pushes back the tip of the core shaft to the initial position, the swing arm and the pivot is rotated in the opposite direction, the movable knife with the rotation of the swing arm and the pivot opposite direction to the rotation to be repositioned, the fixed knife and said movable knife is interconnected to complete the thread cutting operation Te,
The automatic thread trimmer for a sewing machine, wherein the core shaft is pushed by a restoring curved surface of the restoring cam, contracts, and returns. 請求項１記載のミシンの自動糸切り装置において、前記復位カムは、前記導引槽と相互に連接する譲位曲面を備えることを特徴とするミシンの自動糸切り装置。   2. The automatic thread trimmer for a sewing machine according to claim 1, wherein the return cam includes a conferred curved surface connected to the guide tank. 請求項１記載のミシンの自動糸切り装置において、前記位置制限カムは、扇型を呈することを特徴とするミシンの自動糸切り装置。   2. The automatic thread trimmer for a sewing machine according to claim 1, wherein the position limiting cam has a fan shape. 請求項１記載のミシンの自動糸切り装置において、前記駆動器は、電磁石であることを特徴とするミシンの自動糸切り装置。   2. The automatic thread trimmer for a sewing machine according to claim 1, wherein the driver is an electromagnet. 請求項１記載のミシンの自動糸切り装置において、駆動器芯軸の先端には、ローラーを設置することを特徴とするミシンの自動糸切り装置。   2. The automatic thread trimmer for a sewing machine according to claim 1, wherein a roller is installed at the tip of the driver core shaft. 請求項１記載のミシンの自動糸切り装置において、ピボット上には、開口槽を設置し、前記回転シャトル台は、前記ピボットの径方向上に開孔を設置し、開孔中には、定位ネジを螺合し、定位ネジ内には、バネを設置し、バネ先端には、スチールボールを設置し、前記スチールボールは、前記開口槽に接触して固定することを特徴とするミシンの自動糸切り装置。   2. The automatic thread trimmer for a sewing machine according to claim 1, wherein an opening tub is installed on the pivot, and the rotary shuttle base is provided with an opening in a radial direction of the pivot, and the orientation is fixed during the opening. Screws are screwed in, a spring is installed in the stereotaxic screw, a steel ball is installed at the tip of the spring, and the steel ball contacts and is fixed to the opening tank. Thread trimming device. 請求項１記載のミシンの自動糸切り装置において、駆動器芯軸上には、環状の弧状槽を設置し、前記スイングアームは、駆動器芯軸の径方向に開孔を設置し、開孔内には、前記弧状槽に接触するスチールボールとバネを設置し、前記バネの外側は、定位ネジにより固定されることを特徴とするミシンの自動糸切り装置。   2. The automatic thread trimmer for a sewing machine according to claim 1, wherein an annular arc-shaped tank is installed on the driver core shaft, and the swing arm is provided with an opening in a radial direction of the driver core shaft. An automatic thread trimmer for a sewing machine, characterized in that a steel ball and a spring that are in contact with the arc-shaped tank are installed therein, and the outside of the spring is fixed by a stereotactic screw.
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