JP5610405B2 - Fabric sewing method and double chain stitch sewing machine - Google Patents

Fabric sewing method and double chain stitch sewing machine Download PDF

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JP5610405B2
JP5610405B2 JP2012096068A JP2012096068A JP5610405B2 JP 5610405 B2 JP5610405 B2 JP 5610405B2 JP 2012096068 A JP2012096068 A JP 2012096068A JP 2012096068 A JP2012096068 A JP 2012096068A JP 5610405 B2 JP5610405 B2 JP 5610405B2
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sewing
needle
fabric
looper
needle thread
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JP2013212344A (en
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耕一 引地
耕一 引地
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Yamato Sewing Machine Mfg Co Ltd
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Yamato Sewing Machine Mfg Co Ltd
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Priority to TW102111654A priority patent/TWI585260B/en
Priority to KR1020130035777A priority patent/KR101987998B1/en
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B1/00—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both
    • D05B1/08—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both for making multi-thread seams
    • D05B1/10—Double chain-stitch seams
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/02—Loop takers, e.g. loopers for chain-stitch sewing machines, e.g. oscillating
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/30—Driving-gear for loop takers
    • D05B57/32—Driving-gear for loop takers in chain-stitch sewing machines
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B61/00—Loop holders; Loop spreaders; Stitch-forming fingers
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/30—Details

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

Description

本発明は、例えば横筒形に代表される二重環縫いミシンを使用して、Ｔシャツや下着等のように、前後の身頃地が先に縫い合わせられてループ状に加工された丸物生地の端部のほつれ止めのための裾引き縫いなど生地の縫製方法及びその縫製に用いられる二重環縫いミシンに関する。  The present invention, for example, uses a double chain stitch sewing machine represented by a horizontal cylindrical shape, and a round fabric in which front and rear body parts are sewn first and processed into a loop shape, such as a T-shirt and underwear. The present invention relates to a fabric sewing method such as hem stitching for preventing fraying at the end of the fabric and a double chain stitch sewing machine used for the sewing.

例えば、二重環縫いミシンによる丸物生地の裾引き縫いを例にとって説明すると、丸物生地の縫製部分（端縁部を生地の裏面側に折り返して重ね合わせた生地部分）を針板の上面に沿って所定の縫製進行方向に送りながら、針糸を保持して上下動する少なくとも１本の針により針板下に針糸ループを形成すると共に、針の上下動経路に略直交する方向に進退動作するルーパの進出により針糸ループを捉え、その捉えた針糸ループをルーパが保持するルーパ糸により他糸ルーピングすることによって、生地の縫製部分に二重環縫いの縫目を形成する。  For example, a hemline sewing of a round fabric by a double chain stitch sewing machine will be described as an example. A sewing portion of a round fabric (a fabric portion obtained by folding an end edge portion back to the back side of the fabric) and an upper surface of a needle plate. A needle thread loop is formed under the needle plate by at least one needle that moves up and down while holding the needle thread while feeding in a predetermined sewing progress direction, and in a direction substantially orthogonal to the needle vertical movement path. The needle thread loop is captured by the advancement of the looper that moves forward and backward, and the captured needle thread loop is looped with the other thread by the looper thread that is held by the looper, thereby forming a double chain stitch seam in the sewing portion of the fabric.

上記のような二重環縫いの縫目を形成する生地の縫製においては、図１０に示すように、針１が生地Ｗの上方から生地Ｗを貫通して生地Ｗの下方へ移動する縫い始め１針目の縫製時に針糸ＮＴの先端部分が生地Ｗの表面Ｗｆ上に出っ張る。その結果、図１１に示すように、裾引き縫い完了後のＴシャツ等の裾周りの一部に針糸端部分ＮＴａが出っ張ったまま残るという仕上がり不良を生じ、縫製製品の価値が低下する。  In the sewing of the fabric forming the double chain stitch as described above, as shown in FIG. 10, the sewing starts when the needle 1 passes through the fabric W from above the fabric W and moves below the fabric W. The tip portion of the needle thread NT protrudes on the surface Wf of the fabric W at the time of sewing the first stitch. As a result, as shown in FIG. 11, a finished defect that the needle thread end portion NTa remains protruding in a part around the hem of a T-shirt or the like after completion of the hem-sewing is performed, and the value of the sewing product is lowered.

従来の二重環縫いミシンには、縫い始め１針目の縫製により生地Ｗの表面Ｗｆ上に出っ張る針糸端部分ＮＴａを機械的に自動切断する装置が備えられていない。そのため、ミシンオペレータが鋏を手に持って生地Ｗの表面上に出っ張る針糸端部分ＮＴａを手動で切断処理することが一般的に行われる（例えば、特許文献１参照）。  The conventional double chain stitch sewing machine is not provided with a device that automatically cuts the needle thread end portion NTa protruding on the surface Wf of the fabric W by sewing the first stitch at the start of sewing. For this reason, the sewing operator generally performs a manual cutting process on the needle thread end portion NTa protruding on the surface of the fabric W while holding the bag in his hand (see, for example, Patent Document 1).

特許第４０６１４２４号公報  Japanese Patent No. 4061424

従って、従来では、生地Ｗの表面Ｗｆ上に出っ張る針糸端部分ＮＴａの鋏による手動切断処理に熟練オペレータといえども少なくとも数秒以上の時間を要し、その分だけ縫製作業の効率が低下する。また、鋏を持つことでオペレータの手の自由度が落ち、生地の操作性が悪化すると共に、鋏の扱い方によっては、生地に傷を付け易いという問題があった。  Therefore, conventionally, even an experienced operator requires a time of at least several seconds for manual cutting processing by the heel of the needle thread end portion NTa protruding on the surface Wf of the fabric W, and the efficiency of the sewing work is reduced accordingly. In addition, having the heel reduces the degree of freedom of the operator's hands, and deteriorates the operability of the fabric. In addition, depending on how the heel is handled, there is a problem that the fabric is easily damaged.

本発明は上述の実情に鑑みてなされたもので、縫い始め１針目の縫製により生地の表面上に出っ張って残る針糸端部分の処理に手間を要さず省力化が図れると共に、縫製作業の効率及び生地の操作性の向上並びに生地の傷付きを防止することができる生地の縫製方法及び二重環縫いミシンを提供することを目的としている。  The present invention has been made in view of the above-described circumstances, and it is possible to save labor without requiring labor in processing of the needle thread end portion protruding and remaining on the surface of the fabric by sewing of the first stitch at the start of sewing, and the sewing operation can be performed. An object of the present invention is to provide a cloth sewing method and a double chain stitch sewing machine capable of improving efficiency and operability of the cloth and preventing the cloth from being damaged.

上記目的を達成するために、本第１発明に係る生地の縫製方法は、生地を、針板の上面に沿って所定の縫製進行方向に送りながら、針糸を保持して上下動する少なくとも１本の針により前記針板下に針糸ループを形成すると共に、前記針の上下動経路に略直交する方向に進退動作可能なルーパの進出により前記針糸ループを捉え、その捉えた針糸ループを前記ルーパが保持するルーパ糸によりルーピングすることにより、前記生地に二重環縫いの縫目を形成する生地の縫製方法であって、縫い始め１針目の縫製時に前記生地の表面上に出っ張る針糸端部分を２針目以降の縫製動作時に縫製進行方向の下手側に押し倒し状態に移動案内することによって、前記針糸端部分を二重環縫いの縫目中に縫い込み処理することを特徴とする。  In order to achieve the above object, the cloth sewing method according to the first aspect of the present invention includes at least one that moves up and down while holding the needle thread while feeding the cloth in a predetermined sewing progress direction along the upper surface of the needle plate. A needle thread loop is formed under the needle plate by a needle, and the needle thread loop is captured by the advancement of a looper capable of moving back and forth in a direction substantially perpendicular to the vertical movement path of the needle, and the captured needle thread loop Is a sewing method for forming a double-ring stitch on the fabric by looping with a looper thread held by the looper, and a needle protruding on the surface of the fabric at the time of sewing the first stitch at the start of sewing The thread end portion is sewn into the stitches of double chain stitch by moving and guiding the thread end portion to the lower side in the sewing progress direction during the sewing operation after the second stitch. To do.

また、本第２発明に係る生地の縫製方法は、丸物生地の端縁部を生地の裏面側に折り返し重ね合わせられた重ね合わせ生地部分を、針板の上面に沿って所定の縫製進行方向に送りながら、針糸を保持して上下動する少なくとも１本の針により前記針板下に針糸ループを形成すると共に、前記針の上下動経路に略直交する方向に進退動作可能なルーパの進出により前記針糸ループを捉え、その捉えた針糸ループを前記ルーパが保持するルーパ糸によりルーピングすることにより、前記丸物生地の重ね合わせ生地部分の全周に二重環縫いの縫目を形成する丸物生地の縫製方法であって、縫い始め１針目の縫製時に前記重ね合わせ生地部分の表面上に出っ張る針糸端部分を２針目以降の縫製動作時に縫製進行方向の下手側に押し倒し状態に移動案内することによって、前記針糸端部分を二重環縫いの縫目中に縫い込み処理することを特徴とする。  Further, the cloth sewing method according to the second aspect of the present invention provides a predetermined sewing progress direction along the upper surface of the needle plate, with the overlapped cloth portion obtained by folding and overlapping the edge of the round fabric cloth on the back side of the cloth. A looper capable of moving forward and backward in a direction substantially perpendicular to the vertical movement path of the needle while forming a needle thread loop under the needle plate by at least one needle that moves up and down while holding the needle thread. By capturing the needle thread loop by advancing and looping the captured needle thread loop with a looper thread held by the looper, a double chain stitch seam is formed on the entire circumference of the overlapped fabric portion of the round fabric. A method for sewing a round fabric to be formed, wherein a needle thread end portion protruding on the surface of the overlapped fabric portion at the time of sewing of the first stitch at the start of sewing is pushed down to the lower side in the sewing progress direction during the second and subsequent stitches. Move to By Rukoto, characterized by processing stitching the needle thread end portion during stitching of the double chain stitch.

また、本第３発明に係る二重環縫いミシンは、生地をセットし且つ所定の縫製進行方向への送りを案内する針板と、針糸を保持して上下動する少なくとも１本の針と、ルーパ糸を保持して前記針の上下動経路に略直交する方向に進退動作可能で、進出動作時に前記針が針板下に形成する針糸ループを捉えるルーパとを備え、前記ルーパの進出動作により捉えた前記針糸ループを、該ルーパが保持するルーパ糸でルーピングすることにより、前記生地に二重環縫いの縫目を形成する二重環縫いミシンであって、前記針板の下面又は上面には、縫い始め１針目の縫製時に前記針の上下動経路よりも縫製進行方向の上手側に位置しており、２針目以降の縫製動作時に前記針の上下動経路よりも縫製進行方向の下手側に移動することにより、縫い始め１針目の縫製時に前記生地の表面上に出っ張る針糸端部分を縫製進行方向の下手側に押し倒し状態に移動案内する針糸倒し移動案内部材と、該針糸倒し移動案内部材を前記針の上下動経路よりも縫製進行方向の上手側の位置と下手側の位置とに強制的に移動させるアクチュエータと、を具備していることを特徴とする。  The double chain stitch sewing machine according to the third aspect of the invention includes a needle plate for setting a cloth and guiding feeding in a predetermined sewing progress direction, and at least one needle that moves up and down while holding a needle thread. A looper holding the looper thread and capable of advancing and retracting in a direction substantially perpendicular to the vertical movement path of the needle, and having a looper that catches a needle thread loop formed by the needle under the needle plate during the advancing operation. A double chain stitch sewing machine which forms a double chain stitch seam on the fabric by looping the needle thread loop captured by the operation with a looper thread held by the looper, the lower surface of the needle plate Alternatively, the upper surface is positioned on the upper side of the sewing movement direction with respect to the vertical movement path of the needle when sewing the first stitch at the start of sewing, and the sewing movement direction with respect to the vertical movement path of the needle during the second and subsequent sewing operations. Start sewing by moving to the lower side of A needle thread tilting movement guide member for moving and guiding the needle thread end portion protruding on the surface of the cloth to the lower side in the sewing progress direction when sewing the stitches, and moving the needle thread tilting movement guide member up and down the needle And an actuator that forcibly moves to a position on the upper side and a position on the lower side of the sewing progression direction with respect to the path.

また、本第４発明に係る二重環縫いミシンは、丸物生地の端縁部を生地の裏面側に折り返し重ね合わせられた重ね合わせ生地部分をセットし且つ所定の縫製進行方向への送りを案内する針板と、針糸を保持して上下動する少なくとも１本の針と、ルーパ糸を保持して前記針の上下動経路に略直交する方向に進退動作可能で、進出動作時に前記針が針板下に形成する針糸ループを捉えるルーパとを備え、前記ルーパの進出動作により捉えた前記針糸ループを、該ルーパが保持するルーパ糸でルーピングすることにより、前記丸物生地の重ね合わせ生地部分の全周に二重環縫いの縫目を形成する丸物生地縫製用の二重環縫いミシンであって、前記針板の下面又は上面には、縫い始め１針目の縫製時に前記針の上下動経路よりも縫製進行方向の上手側に位置しており、２針目以降の縫製動作時に前記針の上下動経路よりも縫製進行方向の下手側に移動することにより、縫い始め１針目の縫製時に前記重ね合わせ生地部分の表面上に出っ張る針糸端部分を縫製進行方向の下手側に押し倒し状態に移動案内する針糸倒し移動案内部材と、該針糸倒し移動案内部材を前記針の上下動経路よりも縫製進行方向の上手側の位置と下手側の位置とに強制的に移動させるアクチュエータと、を具備していることを特徴とする。  Further, the double chain stitch sewing machine according to the fourth aspect of the present invention sets the overlapped fabric portion in which the end edge of the round fabric is folded back on the back side of the fabric and feeds it in a predetermined sewing progress direction. A needle plate for guiding, at least one needle that moves up and down while holding a needle thread, and a forward and backward movement in a direction substantially perpendicular to the vertical movement path of the needle by holding a looper thread, A looper for capturing a needle thread loop formed under the needle plate, and looping the needle thread loop captured by the advancement operation of the looper with a looper thread held by the looper, thereby overlapping the round fabrics. A double chain stitch sewing machine for sewing circular fabrics forming seams of double chain stitches around the entire circumference of the mating fabric part, wherein the needle plate has a lower surface or an upper surface on the lower surface or upper surface of the stitch plate when the first stitch is sewn. Better in the direction of sewing than the vertical movement path of the needle When the sewing operation is performed for the second and subsequent stitches, the needle moves to the lower side in the sewing progressing direction from the vertical movement path of the needles, so that it protrudes on the surface of the overlapped fabric portion when the first stitch is sewn. A needle thread tying movement guide member for moving and guiding the needle thread end portion to the lower side in the sewing progress direction, and a position of the needle thread tying movement guide member on the upper side in the sewing progress direction with respect to the vertical movement path of the needle And an actuator for forcibly moving to a lower position.

上記のごとき特徴構成を有する本第１〜第４発明に係る生地の縫製方法及び二重環縫いミシンによれば、縫い始め１針目の縫製時に生地の表面上に出っ張る針糸端部分を２針目以降の縫製動作時に縫製進行方向の下手側に押し倒し状態に移動案内し、その押し倒し移動案内した針糸端部分を二重環縫いの縫目中に縫い込み処理することによって、縫い始め１針目の縫製により生地の表面に出っ張る針糸端部分を、オペレータが鋏を手に持って手動切断するといった手間が不要となって省力化を達成できるだけでなく、手動切断のための時間ロスもなくなり縫製作業の効率向上を図ることができる。その上、オペレータが鋏を持つ必要がないため、手の自由度が増し、生地の操作性が良くなり、縫製仕上がりの向上も図ることができる。また、鋏によって生地を傷付けることも殆どなくなり、縫製製品の価値の低下を抑制することができる。  According to the cloth sewing method and the double chain stitch sewing machine according to the first to fourth inventions having the above-described characteristic configuration, the needle thread end portion protruding on the surface of the cloth at the sewing of the first stitch at the start of sewing is the second stitch. During the subsequent sewing operation, the needle is moved and guided to the lower side in the direction of sewing, and the end of the needle thread that has been pushed and moved is sewn into the stitches of the double chain stitch. Not only can the operator need to manually cut the end of the needle thread that protrudes from the surface of the fabric by sewing with the heel in hand, but labor can be saved, and there is no time loss for manual cutting. The efficiency can be improved. In addition, since the operator does not need to have a heel, the degree of freedom of the hand is increased, the operability of the fabric is improved, and the sewing finish can be improved. In addition, the fabric is hardly damaged by the folds, and a decrease in the value of the sewing product can be suppressed.

特に、本第２発明及び第４発明のように、丸物生地を縫製対象として裾引き縫いを行う場合には、縫い始め部分と縫い終り部分とを少し重ね縫いするが、この際、縫い始め１針目の縫製により生地の表面に出っ張る針糸端部分を２針目以降の縫製動作に伴って縫製進行方向の下手側に押し倒し移動案内して、二重環縫いの縫目中に縫い込み処理することができるので、縫製途中で縫製動作を一旦、中断し鋏を持って針糸端部分を切断処理した後に縫製動作を再開して重ね縫いする場合に比べて、縫い終り部分の重ね縫いを含め丸物生地の全周の裾引き縫いを一気に連続的に行うことができ、糸処理のための時間ロスをなくして縫製作業効率の一層の向上を図ることができる。  In particular, as in the second and fourth aspects of the invention, when the hemline sewing is performed on a round fabric as a sewing object, the sewing start portion and the sewing end portion are slightly overlapped, but at this time, the sewing start is started. The needle thread end that protrudes from the surface of the fabric by sewing the first stitch is pushed down and guided to the lower side in the direction of sewing along with the sewing operation for the second and subsequent stitches, and is sewn into the stitches of the double chain stitch. Compared to the case where the sewing operation is temporarily interrupted during sewing and the needle thread end portion is cut with a heel and then the sewing operation is restarted and overlapped stitching is included, the overlap stitching at the end of sewing is included. It is possible to continuously hem the entire circumference of the round fabric at a stretch, eliminating time loss for yarn processing and further improving the sewing work efficiency.

本第１発明及び第２発明に係る生地の縫製方法において、縫い始め１針目に生地の表面に出っ張る前記針糸端部分が、二重環縫い縫目中に、該縫目を形成する複数の針糸ループと平行又は略平行に縫い込み処理されることが好ましい（請求項２及び請求項４）。  In the fabric sewing method according to the first and second inventions, the needle thread end portion protruding from the surface of the fabric at the first stitch at the start of sewing includes a plurality of stitches that form the stitch in the double ring stitch. It is preferable that the stitching process is performed in parallel or substantially in parallel with the needle thread loop (claims 2 and 4).

この場合は、生地の裏面惻に縫い込まれた針糸部分が二重環縫い縫目中に、縫目を形成する複数の針糸ループと平行又は略平行に縫い込み処理されるため、生地の裏面側から見た場合でも、縫目模様の乱れが非常に少なくなり、体裁の良い縫製仕上がり具合を得ることができる。  In this case, since the needle thread portion sewn on the back surface of the fabric is sewn in parallel or substantially parallel to the plurality of needle thread loops forming the stitch during the double chain stitch, Even when viewed from the back side, the stitch pattern is very less disturbed, and a well-finished sewing finish can be obtained.

また、本第３発明及び第４発明に係る二重環縫いミシンにおいて、前記針糸倒し移動案内部材は、前記針板の下面又は上面の縫製進行方向の前後両端近くに設けられたガイドにより前記針板の下面又は上面に沿って縫製進行方向にスライド移動可能に支持された帯板状部材に、前記針の上下動経路よりも縫製進行方向の上手側にスライド移動されているとき並びに前記針の上下動経路よりも縫製進行方向の下手側にスライド移動されているときに前記針板の針落ち部及び生地送り歯用出没溝に連通する一対の上下方向貫通孔部と、これら一対の貫通孔部の間に位置して前記縫製進行方向の上手側の位置から下手側の位置への移動時に生地の表面上に出っ張る針糸端部分に当接して該針糸端部分を縫製進行方向の下手側に押し倒す針糸押し倒し部と、を形成して構成されていることが好ましい（請求項７）。  Further, in the double chain stitch sewing machine according to the third and fourth inventions, the needle thread fall moving guide member is formed by guides provided near the front and rear ends of the needle plate on the lower surface or the upper surface in the sewing progress direction. When the belt plate member supported so as to be slidable in the sewing progress direction along the lower surface or the upper surface of the needle plate is slid to the upper side in the sewing progress direction from the vertical movement path of the needle and the needle A pair of vertical through-hole portions that communicate with the needle drop portion of the throat plate and the dovetail groove for the fabric feed dog when being slid to the lower side in the sewing progress direction with respect to the vertical movement path, and the pair of penetrations It is located between the holes and abuts against the needle thread end portion protruding on the surface of the fabric when moving from the upper side position to the lower side position in the sewing progress direction so that the needle thread end portion is Push the needle thread down to the lower side When, it is preferably constituted by forming a (claim 7).

この場合は、針糸倒し移動案内部材を縫製進行方向に沿って長い帯板状部材から構成して針板の下面又は上面の縫製進行方向の前後両端近くに設けられたガイドにより縫製進行方向に安定よく且つスムーズにスライド移動させることが可能であると共に、縫い始め１針目の縫製動作及び２針目以降の縫製動作時には一対の貫通孔部のいずれか一方が針落ち部及び生地送り歯用出没溝に連通する状態に切換えられることにより、針糸倒し移動案内部材が生地送り歯の出没運動及び針の上下運動の障害になることがないため、所定の縫製動作を常に正常に行える状態を保ちつつ、生地の表面上に出っ張る針糸端部分を押し倒して縫目中への縫い込み処理を確実に行うことができる。  In this case, the needle thread fall moving guide member is composed of a belt-like member that is long along the sewing progress direction, and is provided in the sewing progress direction by guides provided near the front and rear ends of the sewing progress direction on the lower surface or upper surface of the needle plate. Stable and smooth sliding movement is possible, and at the time of sewing operation at the first stitch at the start of sewing and at the sewing operation after the second stitch, one of the pair of through-hole portions is the needle drop portion and the feed groove for the feed dog By switching to a state in which the needle thread is moved, the needle thread fall moving guide member does not become an obstacle to the movement movement of the cloth feed dog and the vertical movement of the needle, so that a state in which a predetermined sewing operation can always be normally performed is maintained. The needle thread end portion protruding on the surface of the fabric can be pushed down and the stitching process into the seam can be performed reliably.

また、本第３発明及び第４発明に係る二重環縫いミシンにおいて、前記針糸倒し移動案内部材は、前記ルーパ糸がルーパ糸切断用メス機構におけるルーパ糸保持部から外されたタイミングにおいて前記縫製進行方向の上手側の位置から下手惻の位置へ強制的に移動されるように構成されていることが好ましい（請求項８）。  Further, in the double chain stitch sewing machine according to the third and fourth aspects of the invention, the needle thread fall moving guide member is arranged at the timing when the looper thread is removed from the looper thread holding part in the looper thread cutting knife mechanism. Preferably, the sewing machine is configured to be forcibly moved from the position on the upper hand side in the sewing progress direction to the position of the lower hand hook (claim 8).

この場合は、生地の表面上に出っ張る針糸端部分が２針目以降の縫製動作時に縫製進行方向の下手側に押し倒し状態に移動案内されるとき、その押し倒し移動案内される針糸端部分によってルーパ糸の端部分も共連れして縫目中に縫い込みやすくなり、ルーパ糸端部分が縫目から大きく側方へはみ出すことを抑え、一層体裁のよい縫製仕上がり具合を得ることができる。  In this case, when the needle thread end portion that protrudes on the surface of the fabric is guided to move down to the lower side in the sewing progress direction during the second and subsequent stitching operations, the looper is guided by the needle thread end portion that is guided to push and move. The end portion of the thread is also brought together so that it can be easily sewn into the seam, and the looper thread end portion can be prevented from greatly protruding laterally from the seam, and a more finished sewing finish can be obtained.

なお、本第３発明及び第４発明における二重環縫いミシンにおいて、対象とするミシンが、横筒形の二重環縫いミシンである場合に好適である（請求項９）が、横筒形以外の１本針二重環縫いミシンや平ベットタイプの二重環縫いミシンを対象ミシンとしてもよい。  In the double chain stitch sewing machine according to the third and fourth aspects of the present invention, it is preferable that the target sewing machine is a horizontal cylindrical double chain stitch sewing machine. Other than this, a single-needle double chain stitch sewing machine or a flat bed type double chain stitch sewing machine may be used as the target sewing machine.

本発明の実施の形態に係る横筒形二重環縫いミシンの全体外観斜視図である。1 is an overall external perspective view of a horizontal cylindrical double chain stitch sewing machine according to an embodiment of the present invention. 同上横筒形二重環縫いミシンにおける針板周辺部の構成を示す要部の拡大斜視図である。It is an expansion perspective view of the principal part which shows the structure of the needle-plate periphery part in a horizontal cylindrical double chain stitch sewing machine same as the above. 同上横筒形二重環縫いミシンにおける針板の構成を針板裏面側から視た斜視図である。It is the perspective view which looked at the composition of the needle plate in a horizontal cylindrical double chain stitch sewing machine same as the above from the back side of the needle plate. 同上横筒形二重環縫いミシンによる縫い始め１針目の縫製動作状態を示す要部の拡大一部破断斜視図である。FIG. 4 is an enlarged partially broken perspective view of a main part showing a sewing operation state of the first stitch at the start of sewing by the horizontal cylindrical double chain stitch sewing machine. 同上横筒形二重環縫いミシンによる縫い始め１針目の縫製動作直後の状態を示す要部の拡大一部破断斜視図である。FIG. 3 is an enlarged partially broken perspective view of the main part showing a state immediately after the sewing operation of the first stitch at the start of sewing by the horizontal cylindrical double chain stitch sewing machine. 同上横筒形二重環縫いミシンによる縫い始め１針目の縫製動作直後に針糸倒し移動案内部材が縫製進行方向の下手側に移動された状態を示す要部の拡大一部破断斜視図である。FIG. 5 is an enlarged partially broken perspective view of a main part showing a state in which the needle thread falling movement guide member is moved to the lower side in the sewing progressing direction immediately after the sewing operation of the first stitch at the start of sewing by the horizontal cylindrical double chain stitch sewing machine. . 同上横筒形二重環縫いミシンによる縫目形成のための１針目の動作を示す要部の拡大斜視図である。It is an expansion perspective view of the principal part which shows operation | movement of the 1st stitch for the stitch formation by a horizontal cylindrical double chain stitch sewing machine same as the above. 同上横筒形二重環縫いミシンによる縫目形勢のための２針目以降の動作を示す要部の拡大斜視図である。It is an expansion perspective view of the principal part which shows the operation | movement after the 2nd stitch for the stitch posture by a horizontal cylindrical double chain stitch sewing machine same as the above. 生地裏面に形成される二重環縫いの縫目の構成を略示する底面図である。It is a bottom view which shows schematically the composition of the stitch of the double chain stitch formed in the cloth back. 縫い始め１針目の縫製により生地の表面に出っ張り残る針糸端部分の状態を示す要部の斜視図である。It is a perspective view of the principal part which shows the state of the needle thread end part which protrudes on the surface of the cloth by sewing the first stitch at the start of sewing. Ｔシャツなどの丸物生地に対する裾引き縫い完了後の状態を説明する正面図である。It is a front view explaining the state after completion of the hemline sewing with respect to round fabrics, such as a T-shirt.

以下、本発明の実施の形態を図面にもとづいて説明する。
図１は本発明の実施の形態に係る横筒形二重環縫いミシンの全体外観斜視図、図２は同横筒形二重環縫いミシンにおける針板周辺部の構成を示す要部の拡大斜視図、図３は同横筒形二重環縫いミシンにおける針板の構成を針板裏面側から視た斜視図である。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall external perspective view of a horizontal cylindrical double chain stitch sewing machine according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a main part showing a configuration of a needle plate periphery in the horizontal cylindrical double chain stitch sewing machine. FIG. 3 is a perspective view of the configuration of the needle plate in the horizontal cylindrical double chain stitch sewing machine as viewed from the back side of the needle plate.

図１に示すように、本実施の形態に係る横筒形二重環縫いミシンＭは、Ｔシャツの裾引き縫いなど丸物生地Ｗの縫製に用いられるものであり、ミシン本体部Ｄの上下位置から左方に向けてミシンアーム部Ｃ及びミシンベッド部Ｂが互いに略平行状に延設されている。この横筒形二重環縫いミシンＭは、図２に示すように、針糸ＮＴを保持して上下方向に往復運動する２本の針１と、ルーパ糸ＬＴを保持して前記針１の上下運動経路に対して直交する方向に進退動作するルーパ２と、針板３と、押え金４（図１参照）と、生地前送り歯及び後送り歯（周知のため、図示省略する。）と、縫製終了時にルーパ糸ＬＴを切断し且つその切断されたルーパ糸端部分ＬＴａを挟み保持するルーパ糸切断用メス機構９と、後述する針糸倒し移動案内部材５と、を備えている。  As shown in FIG. 1, a horizontal cylindrical double chain stitch sewing machine M according to the present embodiment is used for sewing a round fabric W such as a hem sewing of a T-shirt. The sewing machine arm part C and the sewing machine bed part B extend substantially parallel to each other from the position toward the left. As shown in FIG. 2, the horizontal cylindrical double chain stitch sewing machine M includes two needles 1 that hold the needle thread NT and reciprocate in the vertical direction, and a looper thread LT that holds the looper thread LT. Looper 2, which moves forward and backward in a direction perpendicular to the vertical movement path, needle plate 3, presser foot 4 (see FIG. 1), material feed forward and rear feed teeth (not shown for the sake of clarity). A looper thread cutting knife mechanism 9 that cuts the looper thread LT at the end of sewing and holds the cut looper thread end portion LTa, and a needle thread fall moving guide member 5 described later.

針１は、ミシンアーム部Ｃ内のミシン主軸（図示省略）の回転に連動して上下動する針棒１２の下端部に針取付具１３を介して取り付けられて、上昇及び下降する。
ルーパ２は、ルーパ駆動機構の動作を介して針１の上下運動経路に略直交する方向に進退（左進及び右退）動作する。The needle 1 is attached to a lower end portion of a needle bar 12 that moves up and down in conjunction with rotation of a sewing machine main shaft (not shown) in the sewing machine arm portion C via a needle attachment 13 and moves up and down.
The looper 2 moves forward and backward (leftward and rightward) in a direction substantially perpendicular to the vertical movement path of the needle 1 through the operation of the looper driving mechanism.

針板３は、ミシンベッド部Ｂの上面に取り付けられて、図１に示すように、丸物生地Ｗの裾部で、生地端縁部を生地裏面側に折り返して重ね合わせた重ね合わせ生地部分をセットし且つ該丸物生地Ｗの重ね合わせ生地部分の所定の縫製方向Ｙへの送りを案内する。
針板３には、図２及び図３に示すように、前記２本の針１が貫通する針落ち部３ａと、針板３上に突出して縫製進行方向Ｙに移動し、且つ、針板３下に没入して縫製進行方向Ｙとは逆方向に復帰移動する動作を繰り返して丸物生地Ｗを間欠的、強制的に縫製進行方向Ｙに送る生地前送り歯及び生地後送り歯用の出没溝３ｂ，３ｃとが形成されている。The needle plate 3 is attached to the upper surface of the sewing machine bed portion B, and as shown in FIG. 1, as shown in FIG. And feeding the overlapped fabric portion of the round fabric W in a predetermined sewing direction Y is guided.
2 and 3, the needle plate 3 has a needle drop portion 3a through which the two needles 1 penetrate, and protrudes on the needle plate 3 to move in the sewing progress direction Y. 3 For the cloth front feed dog and the cloth rear feed tooth, which are repeatedly immersed and forcibly and forcibly feeding the round fabric W in the sewing progress direction Y by repeating the operation of returning to the direction opposite to the sewing progress direction Y. Intrusion grooves 3b and 3c are formed.

横筒形二重環縫いミシンは、針１の上昇及び下降動作と、ルーパ２の進出及び退入動作とにより、針板３上にセットされた丸物生地Ｗの重ね合わせ生地部分を縫製する。丸物生地Ｗは、針板３上に押え金４により押えられ、ミシンベッドＢの内部に設けられた生地前送り歯及び後送り歯の動作により、図２の矢印Ｙで示す縫製進行方向に送り移動される。  The horizontal cylindrical double chain stitch sewing machine sews the overlapped fabric portion of the round fabric W set on the needle plate 3 by the raising and lowering operations of the needle 1 and the advancement and retraction operations of the looper 2. . The round cloth W is pressed by the presser foot 4 on the needle plate 3 and is moved in the sewing progress direction indicated by the arrow Y in FIG. 2 by the movement of the cloth front feed dog and the rear feed dog provided inside the sewing machine bed B. Moved forward.

上述した針棒１２、ルーパ駆動機構及び生地送り歯の駆動機構は、ミシン主軸（図示省略）からの伝動により互いに同期して動作する公知の機構である。針１は、針糸ＮＴを保持し、丸物生地Ｗの送りが停止している間に、該丸物生地Ｗの重ね合わせ生地部分を貫通して針板３下に達し、その後、上昇して丸物生地Ｗの上方へ抜け出す。ルーパ２は、ルーパ糸ＬＴを保持し、針１の上昇開始に合わせて進出し、針板３下に形成される針糸ＮＴのループＮＴｂを捉える。丸物生地Ｗは、針１の上昇時に送り移動される。針１は、送り移動した丸物生地Ｗを貫いて下降し、退入中のルーパ２が保持するルーパ糸ＬＴを捉え、この捉えたルーパ糸ＬＴにより前記針糸ループＮＴｂをルーピングする。二重環縫いミシンＭは、以上の動作を繰り返して、丸物生地Ｗの裾部に二重環縫いの縫目を形成する。  The needle bar 12, the looper drive mechanism, and the cloth feed dog drive mechanism described above are known mechanisms that operate in synchronization with each other by transmission from a sewing machine main shaft (not shown). While the needle 1 holds the needle thread NT and the feeding of the round fabric W is stopped, the needle 1 penetrates the overlapping fabric portion of the round fabric W and reaches the bottom of the needle plate 3 and then rises. And pull out above the round dough W. The looper 2 holds the looper yarn LT, advances when the needle 1 starts to rise, and catches the loop NTb of the needle yarn NT formed under the needle plate 3. The round fabric W is fed and moved when the needle 1 is raised. The needle 1 descends through the fed round fabric W, captures the looper yarn LT held by the retracting looper 2, and loops the needle thread loop NTb with the captured looper yarn LT. The double chain stitch sewing machine M repeats the above operation to form a double chain stitch seam at the hem of the round fabric W.

上記の如き横筒形二重環縫いミシンＭにおいて、前記針板３の下面には、針糸倒し移動案内部材５と、該針糸倒し移動案内部材５を針１の上下運動経路よりも縫製進行方向Ｙの上手端側の位置と下手端側の位置とに強制的に移動させるアクチュエータとしてのエアシリンダー６と、が具備されている。  In the horizontal cylindrical double chain stitch sewing machine M as described above, the needle thread fall movement guide member 5 and the needle thread fall movement guide member 5 are sewn on the lower surface of the needle plate 3 from the vertical movement path of the needle 1. An air cylinder 6 is provided as an actuator that is forcibly moved to a position on the upper end side and a position on the lower end side in the traveling direction Y.

図３に示すように、前記針糸倒し移動案内部材５は、針板３の下面で縫製進行方向Ｙの前後両端近くに固定されたスライドガイド７，７により、針板３の下面に縫製進行方向Ｙに往復スライド可能に支持された長尺な帯板状部材８から構成される。この帯板状部材８には、該帯板状部材８が縫製進行方向Ｙの上手側にスライド移動されているとき並びに縫製進行方向Ｙの下手側にスライド移動されているときのそれぞれにおいて前記針板３の針落ち部３ａ及び生地送り歯用出没溝３ｂに連通する一対の貫通孔部８ａ、８ｂがスライド方向に並べて形成されていると共に、これら一対の貫通孔部８ａ、８ｂの間には、針糸押し倒し部８ｃが形成されている。また、前記帯板状部材８の縫製進行方向Ｙの上手端には、該帯板状部材８が縫製進行方向Ｙの下手側にスライド移動されたとき、前記スライドガイド７，７の一方に当接して、それ以上の下手側へのスライド移動を停止するストッパ８ｄが形成されている。  As shown in FIG. 3, the needle thread fall moving guide member 5 is sewn on the lower surface of the needle plate 3 by slide guides 7 and 7 fixed on the lower surface of the needle plate 3 near the front and rear ends in the sewing progress direction Y. It is composed of a long belt-like member 8 supported so as to be slidable in the direction Y. The band plate-like member 8 includes the needle when the band plate-like member 8 is slid to the upper side of the sewing progress direction Y and when it is slid to the lower side of the sewing progress direction Y. A pair of through-hole portions 8a and 8b communicating with the needle drop portion 3a of the plate 3 and the dovetail groove 3b for the material feed dog are formed side by side in the sliding direction, and between the pair of through-hole portions 8a and 8b. A needle thread pushing-down portion 8c is formed. Further, when the band plate-like member 8 is slid to the lower side of the sewing progress direction Y, the upper end of the band plate-like member 8 touches one of the slide guides 7, 7. In contact therewith, a stopper 8d is formed to stop further sliding movement to the lower side.

前記針糸倒し移動案内部材５を構成する帯板状部材８は、縫い始め１針目の縫製時には、エアシリンダー６を介して縫製進行方向Ｙの上手側にスライド移動されており、この位置において、縫い始め１針目の縫製時に丸物生地Ｗの表面上に出っ張る針糸端部分ＮＴａに針糸押し倒し部８ｃが当接する。そして、２針目の縫製動作前にエアシリンダー６を介して帯板状部材８が縫製進行方向Ｙの下手側に向けてスライド移動されるとき、針糸押し倒し部８ｃにより丸物生地Ｗの表面上に出っ張る針糸端部分ＮＴａが縫製進行方向Ｙの下手側に押し倒し状態に移動案内されるように構成されている。  The band plate-shaped member 8 constituting the needle thread fall moving guide member 5 is slid to the upper side of the sewing progress direction Y via the air cylinder 6 at the time of sewing of the first stitch at the start of sewing. The needle thread pushing portion 8c comes into contact with the needle thread end portion NTa protruding on the surface of the round fabric W when the first stitch is sewn at the start of sewing. When the band plate-like member 8 is slid toward the lower side of the sewing progress direction Y through the air cylinder 6 before the sewing operation of the second stitch, the needle thread pushing-down portion 8c causes the round fabric W to be on the surface. The needle thread end portion NTa that protrudes from the sewing machine is configured so as to be moved and guided to the lower side of the sewing progress direction Y while being pushed down.

前記帯板状部材８における針糸押し倒し部８ｃの針糸端部分ＮＴａへの当接縁部８ｅは、幅方向の両側部から中央部に行くに従って漸次縫製進行方向Ｙの上手側に位置するような略円弧状に形成されている。これによって、帯板状部材８が縫製進行方向Ｙの下手側にスライド移動されて針糸押し倒し部８ｃにより２本の針糸端部分ＮＴａが押し倒されるとき、２本の針糸端部分ＮＴａが略円弧状の当接縁部８ｅに沿って互いに接近する方向に変位する。  The contact edge portion 8e of the band plate-like member 8 with respect to the needle thread end portion NTa of the needle thread pushing-down portion 8c is gradually positioned on the upper side of the sewing progress direction Y from the both sides in the width direction toward the center. It is formed in a substantially arc shape. As a result, when the band plate-like member 8 is slid to the lower side of the sewing progress direction Y and the two needle thread end portions NTa are pushed down by the needle thread pushing-down portion 8c, the two needle thread end portions NTa are substantially They are displaced along the arcuate contact edge 8e in a direction approaching each other.

次に、上記構成の横筒形二重環縫いミシンＭを用いて、Ｔシャツの裾部など丸物生地Ｗを裾引き縫いする動作について、図４乃至図８を参照しながら説明する。
縫い始め１針目の縫製時において、前記針糸倒し移動案内部材５を構成する帯板状部材８は、図３及び図４に示すように、エアシリンダー６を介して縫製進行方向Ｙの上手側にスライド移動されている。Next, an operation of hem-sewing a round fabric W such as a hem portion of a T-shirt using the horizontal cylindrical double chain stitch sewing machine M having the above configuration will be described with reference to FIGS.
At the time of sewing of the first stitch at the start of sewing, the band plate-like member 8 constituting the needle thread fall moving guide member 5 is on the upper side of the sewing progress direction Y via the air cylinder 6 as shown in FIGS. The slide has been moved to.

この状態で、針１は、丸物生地Ｗの重ね合わせ生地部分を貫通し且つ針板３の針落ち部３ａ及び帯板状部材８の一方の貫通孔部８ａを経て針板３下に達し、その後、上昇して丸物生地Ｗの上方へ抜け出すといった具合に、縫い始め１針目の縫製動作が行われる。これにより、針板３下に針糸ループＮＴｂが形成され、丸物生地Ｗの表面Ｗｆ上には針糸端部分ＮＴａが出っ張ったまま残り、前記針糸倒し移動案内部材５を構成する帯板状部材８における針糸押し倒し部８ｃの当接縁部８ｅに当接している。また、針１の上昇開始に合わせて丸物生地Ｗが前後の送り歯により縫製進行方向Ｙに送られると共に、ルーパ２が進出して、針板３下に形成される針糸ループＮＴｂを捉える。  In this state, the needle 1 passes through the overlapping fabric portion of the round fabric W and reaches the bottom of the needle plate 3 through the needle drop portion 3a of the needle plate 3 and one through hole portion 8a of the band plate member 8. After that, the sewing operation of the first stitch at the start of sewing is performed in such a manner that it rises and comes out above the round fabric W. As a result, a needle thread loop NTb is formed under the needle plate 3, and the needle thread end portion NTa remains protruding on the surface Wf of the round fabric W, and the band plate constituting the needle thread falling movement guide member 5 is formed. The needle member 8 is in contact with the contact edge 8e of the needle thread pushing-down portion 8c. In addition, as the needle 1 starts to rise, the round fabric W is fed by the front and rear feed teeth in the sewing progress direction Y, and the looper 2 advances to catch the needle thread loop NTb formed under the needle plate 3. .

そして、図５に示すように、ルーパ２が所定位置まで進出してルーパ糸ＬＴの糸端部分ＬＴａがルーパ糸切断用メス機構９のルーパ糸保持部から外されたタイミングにおいて、前記針糸倒し移動案内部材５を構成する帯板状部材８がエアシリンダー６により縫製進行方向Ｙの上手側から下手側に向けてスライド移動される。  Then, as shown in FIG. 5, at the timing when the looper 2 advances to a predetermined position and the yarn end portion LTa of the looper yarn LT is removed from the looper yarn holding portion of the looper yarn cutting knife mechanism 9, the needle thread fall is performed. The belt-like member 8 constituting the movement guide member 5 is slid by the air cylinder 6 from the upper side to the lower side in the sewing progress direction Y.

前記帯板状部材８の縫製進行方向Ｙの下手側へのスライド移動により、図６に示すように、縫い始め１針目の縫製動作時に丸物生地Ｗの表面Ｗｆ上に出っ張ったまま帯板状部材８の針糸押し倒し部８ｃの当接縁部８ｅに当接している針糸端部分ＮＴａは、該当接縁部８ｅによって縫製進行方向Ｙの下手側に押し倒し状態に移動案内される。  By the sliding movement of the belt-plate-like member 8 toward the lower side of the sewing progress direction Y, as shown in FIG. 6, the belt-plate-like shape is projected on the surface Wf of the round fabric W during the sewing operation of the first stitch at the start of sewing. The needle thread end portion NTa that is in contact with the contact edge 8e of the needle thread push-down portion 8c of the member 8 is moved and guided to the lower side of the sewing progress direction Y by the contact edge 8e.

この押し倒し状態への移動案内時において、２本の針糸端部分ＮＴａは、当接縁部８ｅが略円弧状であるため、その略円弧状の当接縁部８ｅに沿って互いに接近する方向に変位される。また、帯板状部材８が縫製進行方向Ｙの下手側にスライド移動された状態において、該帯板状部材８の他方の貫通孔部８ｂが針板３の針落ち部３ａ及び生地送り歯用出没溝３ｂに連通して、それ以降の生地送り歯の出没運動及び針の上下運動の障害になることがないため、２針目以降の縫製動作を正常に行える状態が保たれる。  At the time of the movement guide to the pushed-down state, the two needle thread end portions NTa have directions in which the contact edge portion 8e is close to each other along the substantially arc-shaped contact edge portion 8e because the contact edge portion 8e has a substantially circular arc shape. Is displaced. Further, in the state where the band plate-like member 8 is slid to the lower side of the sewing progress direction Y, the other through-hole portion 8b of the band plate-like member 8 is used for the needle drop portion 3a of the needle plate 3 and the cloth feed dog. Since it does not interfere with the subsequent movement of the cloth feed teeth and the vertical movement of the needle by communicating with the protruding and protruding groove 3b, the state in which the sewing operation after the second stitch can be normally performed is maintained.

続いて、針１の上昇下降運動、ルーパ２の進退運動、生地前後送り歯による丸物生地の送り作用によって、図７及び図８に示すように、２針目以降の縫製動作が行われる。この２針目以降の縫製動作に伴ない、ルーパ２が捉えた針糸ループＮＴｂはルーパ糸ＬＴにより順次ルーピングされて二重環縫いが行なわれる。  Subsequently, as shown in FIGS. 7 and 8, the sewing operation for the second and subsequent stitches is performed by the upward and downward movement of the needle 1, the forward and backward movement of the looper 2, and the feeding action of the round cloth by the cloth front and rear feed teeth. In accordance with the sewing operation after the second stitch, the needle thread loop NTb captured by the looper 2 is sequentially looped by the looper thread LT, and double chain stitching is performed.

そして、１針目の縫製動作直後に前記針糸倒し移動案内部材５により縫製進行方向Ｙの下手側に押し倒し状態に移動案内された２本の針糸端部分ＮＴａは、図９に示すように、二重環縫いの縫目Ａ中に縫い込み処理される。このとき、２本の針糸端部分ＮＴａは互いに接近した状態で二重環縫いの縫目Ａと平行又は略平行に縫い込み処理される。また、ルーパ糸端部分ＬＴａも押し倒し移動案内される針糸端部分ＮＴａに共連れされて縫目Ａ中に縫い込み処理される。  Then, immediately after the sewing operation of the first stitch, the two needle thread end portions NTa, which are moved and guided to the lower side of the sewing progress direction Y by the needle thread tilt moving guide member 5, are shown in FIG. The stitching process is performed in the stitch A of the double ring stitch. At this time, the two needle thread end portions NTa are sewn in parallel or substantially in parallel with the stitch A of the double chain stitch while being close to each other. Further, the looper thread end portion LTa is also pushed into the seam A along with the needle thread end portion NTa to be guided to move.

以上のような動作により、丸物生地Ｗの重ね合わせ生地部分の全周に二重環縫いの縫目Ａを形成する裾引き縫いが行なわれるが、この裾引き縫い時に、縫い始め１針目の縫製時に生地Ｗの表面Ｗｆに出っ張る針糸端部分ＮＴａを２針目の縫製前に二重環縫いの縫目Ａ中に縫い込み処理することによって、オペレータが鋏を手に持って手動切断するといった手間が全く不要となって省力化を達成できるだけでなく、手動切断のための時間ロスもなくなり縫製作業の効率向上を図ることができる。また、オペレータが鋏を持つ必要がないため、手の自由度が増し、生地Ｗの操作性が良くなり、縫製仕上がりの向上も図ることができる。更に、鋏によって生地Ｗを傷付けることも殆どなく、縫製製品の価値の低下を抑制することができる。  Through the above operation, the hemline stitching for forming the double chain stitch seam A is performed on the entire circumference of the overlapped fabric portion of the round fabric material W. At the time of this hemline stitching, the first stitch at the start of sewing is performed. When the needle thread end NTa protruding on the surface Wf of the fabric W at the time of sewing is sewn into the stitch A of the double ring stitch before the second stitch is sewn, the operator manually cuts with the heel in hand. Not only can labor be eliminated and labor saving can be achieved, but there is no time loss for manual cutting, and the efficiency of sewing work can be improved. Further, since it is not necessary for the operator to hold the heel, the degree of freedom of the hand is increased, the operability of the fabric W is improved, and the sewing finish can be improved. Furthermore, the fabric W is hardly damaged by the folds, and a decrease in the value of the sewing product can be suppressed.

特に、本実施形態のように、丸物生地Ｗを縫製対象として裾引き縫いを行う場合には、縫い始め部分と縫い終り部分とを少し重ね縫いするが、この際、縫い始め１針目の縫製により生地Ｗの表面に出っ張る針糸端部分ＮＴａを２針目以降の縫製動作に伴って縫製進行方向Ｙの下手側に押し倒し移動案内して、二重環縫いの縫目Ａ中に縫い込み処理することが可能であるから、縫製途中で縫製動作を一旦、中断し鋏を持って針糸端部分ＮＴａを手動で切断処理した後に縫製動作を再開して重ね縫いする必要がなく、縫い終り部分の重ね縫いを含め丸物生地Ｗの全周の裾引き縫いを一気に連続的に行うことができる。これにより、針糸端部分ＮＴａの処理のための時間ロスをなくして縫製作業効率の一層の向上を図ることができる。  In particular, as in the present embodiment, when the hemline sewing is performed using the round fabric W as a sewing object, the sewing start portion and the sewing end portion are slightly overlapped, but at this time, the first stitch at the start of sewing is sewn. As a result, the needle thread end portion NTa protruding from the surface of the fabric W is pushed down to the lower side of the sewing progress direction Y in accordance with the sewing operation after the second stitch, and is guided into the stitch A in the double chain stitch. Therefore, it is not necessary to suspend the sewing operation once in the middle of sewing and manually cut the needle thread end portion NTa with a heel, and then restart the sewing operation to perform over-sewing. It is possible to continuously perform the hem sewing on the entire circumference of the round fabric W including over stitching at once. Thereby, the time loss for processing the needle thread end portion NTa can be eliminated, and the sewing work efficiency can be further improved.

また、針糸端部分ＮＴａは縫目Ａ中に各針糸ループＮＴｂと平行又は略平行に縫い込み処理されるため、生地Ｗの裏面側から見た場合でも、縫目模様の乱れが非常に少なくなり、体裁の良い縫製仕上がり具合を得ることができる。  Further, since the needle thread end portion NTa is sewn in parallel or substantially in parallel with each needle thread loop NTb during the stitch A, even when viewed from the back side of the fabric W, the stitch pattern is very disturbed. The number of stitches can be reduced, and a good sewing finish can be obtained.

更に、生地Ｗの表面Ｗｆ上に出っ張る針糸端部分ＮＴａが２針目以降の縫製動作時に縫製進行方向Ｙの下手側に押し倒し状態に移動案内されるとき、その押し倒し移動案内される針糸端部分ＮＴａによってルーパ糸端部分ＬＴａも共連れして倒し、縫目Ａ中に縫い込むことが可能であり、ルーパ糸端部分ＬＴａが縫目Ａから大きく側方へはみ出すことを抑え、一層体裁のよい縫製仕上がり具合を得ることができる。  Further, when the needle thread end portion NTa protruding on the surface Wf of the fabric W is guided to be pushed down to the lower side of the sewing progress direction Y during the second and subsequent stitching operations, the needle thread end portion that is guided to push down and move is guided. NTa can also bring down the looper thread end portion LTa together and sew it into the seam A. The looper thread end portion LTa is prevented from protruding greatly from the seam A to the side, making the appearance even better. Sewing finish can be obtained.

以上、本発明の実施の形態について説明したが、本発明は、２本針型式の横筒形二重環縫いミシンＭへの適用に限らず、横筒形以外の１本針型式の二重環縫いミシンや平ベットタイプの二重環縫いミシンに適用しても、上記実施の形態と同様な効果を奏することができる。  The embodiment of the present invention has been described above. However, the present invention is not limited to the application to the two-needle type horizontal cylindrical double chain stitch sewing machine M, and the single-needle type dual-type other than the horizontal cylindrical shape is used. Even when applied to a chain stitch sewing machine or a flat bed type double chain stitch sewing machine, the same effects as in the above embodiment can be obtained.

また、上記実施の形態においては、針糸倒し移動案内部材５として、針板３の下面に沿って縫製進行方向Ｙにスライド移動可能で、そのスライド移動方向に並べて、針板３の針落ち部３ａ及び生地送り歯用出没溝３ｂに連通する一対の貫通孔部８ａ、８ｂが形成されていると共に、これら一対の貫通孔部８ａ、８ｂの間に、針糸押し倒し部８ｃが形成されている構成の帯板状部材８を用いたが、これに限らず、生地Ｗの表面に出っ張る針糸端部分ＮＴａを縫製進行方向Ｙの下手側に押し倒し状態に移動案内できるものであれば、どのような構成のものを用いてもよい。  In the above embodiment, the needle thread fall moving guide member 5 is slidable in the sewing progress direction Y along the lower surface of the needle plate 3, and is aligned in the slide movement direction so that the needle drop portion of the needle plate 3 is aligned. A pair of through-hole portions 8a and 8b communicating with 3a and the dovetail groove 3b for the material feed dog are formed, and a needle thread pushing-down portion 8c is formed between the pair of through-hole portions 8a and 8b. The band plate-shaped member 8 having the configuration is used. However, the present invention is not limited to this, as long as the needle thread end portion NTa protruding on the surface of the fabric W can be pushed down toward the lower side of the sewing progress direction Y and moved and guided. You may use the thing of a simple structure.

また、上記実施の形態においては、針糸倒し移動案内部材５を、針板３の下面に設けたが、針板３の上面に設けてもよい。
さらに、針糸倒し移動案内部材５を縫製進行方向Ａの上手側の位置と下手側の位置とに強制的に移動させるアクチュエータとして、上記実施の形態では、エアシリンダー６を用いたが、これに限らず、電磁ソレノイドやエア以外の流体圧シリンダー等を用いてもよい。In the embodiment described above, the needle thread fall moving guide member 5 is provided on the lower surface of the needle plate 3, but may be provided on the upper surface of the needle plate 3.
Further, in the above embodiment, the air cylinder 6 is used as an actuator for forcibly moving the needle thread fall moving guide member 5 between the upper side position and the lower side position in the sewing progress direction A. Not limited to this, an electromagnetic solenoid or a fluid pressure cylinder other than air may be used.

１ 針
２ ルーパ
３ 針板
５ 針糸倒し移動案内部材
６ エアシリンダー（アクチュエータ）
７ スライドガイド
８ 帯板状部材
８ａ，８ｂ 貫通孔
８ｃ 針糸押し倒し部
９ ルーパ糸切断用メス機構
Ａ 縫目
Ｍ 二重環縫いミシン
ＮＴ 針糸
ＮＴａ 針糸端部分
ＮＴｂ 針糸ループ
ＬＴ ルーパ糸
ＬＴａ ルーパ糸端部分
Ｗ 丸物生地
Ｗｆ 生地表面
Ｙ 縫製進行方向1 Needle 2 Looper 3 Needle plate 5 Needle thread fall guide member 6 Air cylinder (actuator)
7 Slide guide 8 Band-like members 8a, 8b Through-hole 8c Needle thread pushing down part 9 Looper thread cutting knife mechanism A Stitch M Double chain stitch machine NT Needle thread NTa Needle thread end part NTb Needle thread loop LT Looper thread LTa Looper thread end W Round fabric Wf Fabric surface Y Sewing direction

Claims (9)

生地を、針板の上面に沿って所定の縫製進行方向に送りながら、針糸を保持して上下動する少なくとも１本の針により前記針板下に針糸ループを形成すると共に、前記針の上下動経路に略直交する方向に進退動作可能なルーパの進出により前記針糸ループを捉え、その捉えた針糸ループを前記ルーパが保持するルーパ糸によりルーピングすることにより、前記生地に二重環縫いの縫目を形成する生地の縫製方法であって、
縫い始め１針目の縫製時に前記生地の表面上に出っ張る針糸端部分を２針目以降の縫製動作時に縫製進行方向の下手側に押し倒し状態に移動案内することによって、前記針糸端部分を二重環縫いの縫目中に縫い込み処理する
ことを特徴とする生地の縫製方法。While sending the cloth along the upper surface of the needle plate in a predetermined sewing progress direction, a needle thread loop is formed under the needle plate by at least one needle that moves up and down while holding the needle thread, The needle thread loop is captured by the advancement of a looper capable of moving forward and backward in a direction substantially perpendicular to the vertical movement path, and the captured needle thread loop is looped by a looper thread held by the looper, whereby a double ring is formed on the fabric. A method for sewing a fabric forming a stitch seam,
By moving and guiding the needle thread end portion protruding on the surface of the fabric at the start of sewing to the lower side in the sewing progress direction during the second stitch and subsequent sewing operations, the needle thread end portion is doubled. A sewing method for a fabric, characterized in that a sewing process is performed during seam of a chain stitch. 前記針糸端部分が、二重環縫い縫目中に、該縫目を形成する複数の針糸ループと平行又は略平行に縫い込み処理される
ことを特徴とする請求項１に記載の生地の縫製方法。The fabric according to claim 1, wherein the needle thread end portion is sewn and processed in parallel or substantially parallel to a plurality of needle thread loops forming the seam during a double chain stitch. Sewing method. 丸物生地の端縁部を生地の裏面側に折り返し重ね合わせられた重ね合わせ生地部分を、針板の上面に沿って所定の縫製進行方向に送りながら、針糸を保持して上下動する少なくとも１本の針により前記針板下に針糸ループを形成すると共に、前記針の上下動経路に略直交する方向に進退動作可能なルーパの進出により前記針糸ループを捉え、その捉えた針糸ループを前記ルーパが保持するルーパ糸によりルーピングすることにより、前記丸物生地の重ね合わせ生地部分の全周に二重環縫いの縫目を形成する丸物生地の縫製方法であって、
縫い始め１針目の縫製時に前記重ね合わせ生地部分の表面上に出っ張る針糸端部分を２針目以降の縫製動作時に縫製進行方向の下手側に押し倒し状態に移動案内することによって、前記針糸端部分を二重環縫いの縫目中に縫い込み処理する
ことを特徴とする生地の縫製方法。At least move up and down while holding the needle thread while feeding the overlapped fabric portion that is the end edge of the round fabric folded back to the back side of the fabric in the predetermined sewing progress direction along the upper surface of the needle plate A needle thread loop is formed under the needle plate by one needle, and the needle thread loop is captured by the advancement of a looper capable of moving forward and backward in a direction substantially perpendicular to the vertical movement path of the needle, and the captured needle thread A loop fabric sewing method for looping loops with a looper thread held by the looper to form double ring stitches on the entire circumference of the overlapped fabric portion of the round fabric,
By moving and guiding the needle thread end portion protruding on the surface of the overlapped fabric portion at the start of sewing to the lower side in the sewing progress direction during the second stitch and subsequent sewing operations, the needle thread end portion is moved and guided. A method for sewing fabric, characterized in that sewing is performed in a double chain stitch. 前記針糸端部分が、二重環縫い縫目中に、該縫目を形成する針糸ループと平行又は略平行に縫い込み処理される
ことを特徴とする請求項２に記載の生地の縫製方法。3. The fabric sewing according to claim 2, wherein the needle thread end portion is sewn in parallel or substantially in parallel with a needle thread loop forming the seam during a double chain stitch. Method. 生地をセットし且つ所定の縫製進行方向への送りを案内する針板と、針糸を保持して上下動する少なくとも１本の針と、ルーパ糸を保持して前記針の上下動経路に略直交する方向に進退動作可能で、進出動作時に前記針が針板下に形成する針糸ループを捉えるルーパとを備え、前記ルーパの進出動作により捉えた前記針糸ループを、該ルーパが保持するルーパ糸でルーピングすることにより、前記生地に二重環縫いの縫目を形成する二重環縫いミシンであって、
前記針板の下面又は上面には、縫い始め１針目の縫製時に前記針の上下動経路よりも縫製進行方向の上手側に位置しており、２針目以降の縫製動作時に前記針の上下動経路よりも縫製進行方向の下手側に移動することにより、縫い始め１針目の縫製時に前記生地の表面上に出っ張る針糸端部分を縫製進行方向の下手側に押し倒し状態に移動案内する針糸倒し移動案内部材と、該針糸倒し移動案内部材を前記針の上下動経路よりも縫製進行方向の上手側の位置と下手側の位置とに強制的に移動させるアクチュエータと、を具備している
ことを特徴とする二重環縫いミシン。A needle plate for setting the fabric and guiding feeding in a predetermined sewing progress direction, at least one needle that moves up and down while holding the needle thread, and a looper thread that holds the looper thread and is substantially in the vertical movement path of the needle A looper capable of moving back and forth in an orthogonal direction and capturing a needle thread loop formed by the needle below the needle plate during the advancement operation, and the looper holds the needle thread loop captured by the advancement operation of the looper. A double chain stitch sewing machine that forms double chain stitch seams on the fabric by looping with a looper thread,
The lower or upper surface of the needle plate is positioned on the upper side of the sewing movement direction from the vertical movement path of the needle when sewing the first stitch at the start of sewing, and the vertical movement path of the needle during the sewing operation after the second stitch. By moving to the lower side of the sewing progressing direction, the needle thread end moving that guides the needle thread end portion protruding on the surface of the fabric to the lower side of the sewing progressing direction when the first stitch at the beginning of sewing is sewn is guided. A guide member, and an actuator that forcibly moves the needle thread fall moving guide member to a position on the upper side and a position on the lower side of the sewing movement direction with respect to the vertical movement path of the needle. Features a double chain stitch sewing machine. 丸物生地の端縁部を生地の裏面側に折り返し重ね合わせられた重ね合わせ生地部分をセットし且つ所定の縫製進行方向への送りを案内する針板と、針糸を保持して上下動する少なくとも１本の針と、ルーパ糸を保持して前記針の上下動経路に略直交する方向に進退動作可能で、進出動作時に前記針が針板下に形成する針糸ループを捉えるルーパとを備え、前記ルーパの進出動作により捉えた前記針糸ループを、該ルーパが保持するルーパ糸でルーピングすることにより、前記丸物生地の重ね合わせ生地部分の全周に二重環縫いの縫目を形成する丸物生地縫製用の二重環縫いミシンであって、
前記針板の下面又は上面には、縫い始め１針目の縫製時に前記針の上下動経路よりも縫製進行方向の上手側に位置しており、２針目以降の縫製動作時に前記針の上下動経路よりも縫製進行方向の下手側に移動することにより、縫い始め１針目の縫製時に前記重ね合わせ生地部分の表面上に出っ張る針糸端部分を縫製進行方向の下手側に押し倒し状態に移動案内する針糸倒し移動案内部材と、該針糸倒し移動案内部材を前記針の上下動経路よりも縫製進行方向の上手側の位置と下手側の位置とに強制的に移動させるアクチュエータと、を具備している
ことを特徴とする二重環縫いミシン。Set the overlapped fabric part where the edge of the round fabric is folded back on the back side of the fabric, and move up and down while holding the needle thread to guide the feed in the predetermined sewing progress direction At least one needle, and a looper that holds a looper thread and is capable of moving back and forth in a direction substantially perpendicular to the vertical movement path of the needle and capturing a needle thread loop formed under the needle plate by the needle during the forward movement. And looping the needle thread loop captured by the advancement operation of the looper with a looper thread held by the looper, so that double circular stitches are formed on the entire circumference of the overlapped fabric portion of the round fabric. A double chain stitch sewing machine for sewing circular fabrics to be formed,
The lower or upper surface of the needle plate is positioned on the upper side of the sewing movement direction from the vertical movement path of the needle when sewing the first stitch at the start of sewing, and the vertical movement path of the needle during the sewing operation after the second stitch. The needle that moves and guides the needle thread end portion protruding on the surface of the overlapped fabric portion to the lower side in the sewing progress direction is moved and guided to the lower side in the sewing progress direction by moving to the lower side in the sewing progress direction. A thread fall movement guide member, and an actuator for forcibly moving the needle thread fall movement guide member to a position on the upper side and a position on the lower side in the sewing progress direction with respect to the vertical movement path of the needle. A double chain stitch sewing machine characterized by 前記針糸倒し移動案内部材は、前記針板の下面又は上面の縫製進行方向の前後両端近くに設けられたガイドにより前記針板の下面又は上面に沿って縫製進行方向にスライド移動可能に支持された帯板状部材に、前記針の上下動経路よりも縫製進行方向の上手側にスライド移動されているとき並びに前記針の上下動経路よりも縫製進行方向の下手側にスライド移動されているときに前記針板の針落ち部及び生地送り歯用出没溝に連通する一対の上下方向貫通孔部と、これら一対の貫通孔部の間に位置して前記縫製進行方向の上手側の位置から下手側の位置への移動時に生地の表面上に出っ張る針糸端部分に当接して該針糸端部分を縫製進行方向の下手側に押し倒す針糸押し倒し部と、を形成して構成されている
ことを特徴とする請求項５又は６に記載の二重環縫いミシン。The needle thread fall moving guide member is supported so as to be slidable in the sewing advance direction along the lower or upper surface of the needle plate by guides provided near the front and rear ends of the lower and upper surfaces of the needle plate in the sewing advance direction. When the belt is slid to the upper side of the sewing movement direction with respect to the vertical movement path of the needle and when it is slid to the lower side of the sewing movement direction with respect to the vertical movement path of the needle. A pair of vertical through-hole portions communicating with the needle drop portion of the throat plate and the dovetail groove for the cloth feed dog, and a lower position from a position on the upper side in the sewing progress direction between the pair of through-hole portions. A needle thread push-down portion that abuts the needle thread end portion that protrudes on the surface of the fabric when moving to the side position and pushes the needle thread end portion toward the lower side in the sewing progressing direction. The claim 5 or 6 characterized by the above-mentioned. Double chain stitch sewing machine as claimed. 前記針糸倒し移動案内部材は、前記ルーパ糸がルーパ糸切断用メス機構におけるルーパ糸保持部から外されたタイミングにおいて前記縫製進行方向の上手側の位置から下手側の位置へ強制的に移動されるように構成されている
ことを特徴とする請求項５ないし７のいずれか１項に記載の二重環縫いミシン。The needle thread fall moving guide member is forcibly moved from the upper position to the lower position in the sewing progress direction at the timing when the looper thread is removed from the looper thread holding portion of the looper thread cutting knife mechanism. The double chain stitch sewing machine according to any one of claims 5 to 7, wherein the sewing machine is configured as described above. 対象とするミシンが、横筒形の二重環縫いミシンである請求項５ないし８のいずれか１項に記載の二重環縫いミシン。  The double chain stitch sewing machine according to any one of claims 5 to 8, wherein the target sewing machine is a horizontal cylindrical double chain stitch sewing machine.
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