JP2008212442A - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
JP2008212442A
JP2008212442A JP2007055151A JP2007055151A JP2008212442A JP 2008212442 A JP2008212442 A JP 2008212442A JP 2007055151 A JP2007055151 A JP 2007055151A JP 2007055151 A JP2007055151 A JP 2007055151A JP 2008212442 A JP2008212442 A JP 2008212442A
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Japan
Prior art keywords
thread
upper thread
sewing machine
lower thread
sewing
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JP2007055151A
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Japanese (ja)
Inventor
Norikazu Hayakawa
範一 早川
Motonari Nakano
元就 中野
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Brother Industries Ltd
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Brother Industries Ltd
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Application filed by Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP2007055151A priority Critical patent/JP2008212442A/en
Priority to CN2008100740547A priority patent/CN101260600B/en
Priority to KR1020080020272A priority patent/KR100983697B1/en
Priority to DE602008000625T priority patent/DE602008000625D1/en
Priority to EP08004152A priority patent/EP1967629B1/en
Priority to AT08004152T priority patent/ATE457378T1/en
Publication of JP2008212442A publication Critical patent/JP2008212442A/en
Pending legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D05B65/06—Devices for severing the needle or lower thread and for disposing of the severed thread end ; Catching or wiping devices for the severed thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B29/00—Pressers; Presser feet
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B63/00—Devices associated with the loop-taker thread, e.g. for tensioning
    • 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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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent an end portion of a needle thread and a bobbin thread cut by a needle thread cutting means and a bobbin thread cutting means and held by a needle thread holding mechanism and a bobbin thread holding mechanism from being sewn when starting sewing. <P>SOLUTION: A needle thread cutting device 30 for cutting the needle thread, the needle thread holding mechanism 31, and a needle thread direction adjusting mechanism 33 are arranged in the upper side of a head portion 2 and a bobbin thread cutting device 60 for cutting the bobbin thread, the bobbin thread holding mechanism 61, and a bobbin thread direction adjusting mechanism 63 are arranged in the head portion 2 in a pattern sewing machine 1. The pulling direction of the needle thread 14 can be changed by the needle thread direction adjusting mechanism 33 such that the pulling direction of the needle thread 14 in a thread end holding state differs from the sewing direction when starting pattern sewing. The pulling direction of the bobbin thread 21 can be set to be the same direction advancing from a needle dropping point 5a to a thread guide hole 23b of a bobbin case 23 by the bobbin thread direction adjusting mechanism 63. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、縫製終了時に上糸と下糸を夫々個別に切断する上下糸切断手段と、各糸切断手段で切断された糸の糸端を夫々保持する上下糸保持機構とを備えたミシンに関する。   The present invention relates to a sewing machine comprising upper and lower thread cutting means for individually cutting an upper thread and a lower thread at the end of sewing, and an upper and lower thread holding mechanism for holding the thread ends of the threads cut by the respective thread cutting means. .

従来、本縫いミシンやパターン縫いミシン等のミシンは、加工布に連なる上糸と下糸を切断する糸切り装置と、この糸切り装置で切断された上糸や下糸の糸端を保持する糸保持機構を設けている。縫製終了時に、自動的に、或いは作業者による糸切り指示により、加工布の上側或いは下側において、上糸と下糸を同時に切断してから、糸端を保持するようになっている。   Conventionally, a sewing machine such as a main sewing machine or a pattern sewing machine holds a thread trimming device that cuts an upper thread and a lower thread connected to a work cloth, and an end of an upper thread or a lower thread that is cut by the thread trimming apparatus. A thread holding mechanism is provided. At the end of sewing, automatically or in accordance with a thread trimming instruction from the operator, the upper and lower threads are cut simultaneously on the upper or lower side of the work cloth, and then the thread ends are held.

例えば、特許文献１に記載のミシンの上糸切断装置は、上糸挟持機構と、切断部材と、固定板と、シリンダ等からなる上糸切断手段をベッド部の上側に設けている。縫製終了時の糸切断に際して、切断部材の発熱により上糸が布押えと加工布の間で切断される。その後、上糸挟持機構は縫針側の上糸端部を保持した状態でシリンダの退入駆動により元の位置に復帰する。次の縫製開始時に、上糸挟持機構が保持する上糸端部は、縫針の縫製動作により縫針側に引っ張られて上糸挟持機構から抜けるようになっている。   For example, an upper thread cutting device described in Patent Document 1 has an upper thread cutting mechanism including an upper thread clamping mechanism, a cutting member, a fixing plate, a cylinder, and the like provided above the bed portion. When the thread is cut at the end of sewing, the upper thread is cut between the work presser and the work cloth by the heat generated by the cutting member. Thereafter, the upper thread clamping mechanism returns to the original position by the retracting drive of the cylinder while holding the upper thread end portion on the sewing needle side. At the start of the next sewing, the upper thread end held by the upper thread clamping mechanism is pulled toward the sewing needle side by the sewing operation of the sewing needle so as to come out of the upper thread clamping mechanism.

特許文献２に記載のミシンの糸切装置は、加工布の上側に１対の上糸切りメスと挟持体を設けるとともに、加工布の下側に固定メス、動メス回動腕、下糸たぐり板等を設けている。縫製終了時に、先に、上糸切りメスの協働で上糸を切断し、一方の上糸切りメスと挟持体とで上糸の糸端を保持する。更に、動メス回動腕と下糸たぐり板とが同時に回動して下糸を固定メスとで切断後、回動復帰したときに、下糸たぐり板と動メスの先端とで下糸の糸端を保持するようにしてある。
特開平４−２６４９０号公報（第３〜５頁、図２，図４） 特開平２−２１３３８５号公報（第３〜５頁、図２，図４） The thread trimming device of the sewing machine described in Patent Document 2 is provided with a pair of upper thread trimming knife and a clamping body on the upper side of the work cloth, and a fixed knife, a moving knife rotating arm, and lower thread tension on the lower side of the work cloth. A board is provided. At the end of sewing, first, the upper thread is cut with the cooperation of the upper thread trimmer, and the upper end of the upper thread is held by one upper thread trimmer and the clamping body. Furthermore, when the moving knife rotating arm and the bobbin thread cutting plate rotate simultaneously to cut the bobbin thread with the fixed knife, and return to rotation, the bobbin thread bobbing plate and the tip of the moving bobbin The yarn end is held.
Japanese Patent Laid-Open No. 4-26490 (pages 3 to 5, FIGS. 2 and 4) JP-A-2-213385 (pages 3 to 5, FIGS. 2 and 4)

特許文献１に記載のミシンの上糸切断装置においては、縫製終了時に、上糸切断手段により切断された上糸の縫針側の糸端を保持するようにしている。この縫針の目孔から延びる糸端部の保持方向が、次回において縫製を開始した際の縫製方向と一致するような場合、保持状態が解放された上糸端部が縫製方向に向かう加工布上に載置される。その結果、この上糸端部が加工布に縫い込まれ、縫製開始時における縫目が汚くなるという問題がある。   In the upper thread cutting device of the sewing machine described in Patent Document 1, the thread end on the sewing needle side of the upper thread cut by the upper thread cutting means is held at the end of sewing. If the holding direction of the thread end extending from the stitch hole of the sewing needle coincides with the sewing direction when sewing is started next time, the upper thread end that has been released from the holding state is moved to the sewing direction. Placed on. As a result, there is a problem that the upper thread end is sewn into the work cloth, and the stitches at the start of sewing become dirty.

特許文献２に記載のミシンの糸切装置においても同様に、糸切断後に上糸と下糸の糸端を夫々個別に保持するようにしている。縫製開始時の縫製方向と、上糸端部の保持方向、或いは下糸端部の保持方向が一致する場合、次回における縫製開始時に、糸保持が解放された上糸端部や下糸端部が加工布に縫い込まれるという問題がある。   Similarly, in the thread trimming device of the sewing machine described in Patent Document 2, the yarn ends of the upper thread and the lower thread are individually held after thread cutting. If the sewing direction at the start of sewing matches the holding direction of the upper thread end or the holding direction of the lower thread end, the upper thread end or the lower thread end that has been released from the thread holding at the next sewing start Is sewn into the work cloth.

本発明の目的は、上糸切断手段や下糸切断手段で切断されて上糸保持機構や下糸保持機構により保持されていた上糸端部や下糸端部の縫製開始時における縫い込みを防止できるようにすることである。   An object of the present invention is to perform sewing at the start of sewing of an upper thread end part and a lower thread end part that have been cut by an upper thread cutting means or a lower thread cutting means and held by an upper thread holding mechanism or a lower thread holding mechanism. It is to be able to prevent.

請求項１のミシンは、縫針を取付けた針棒と、回転釜と、針板の上方で加工布から縫針の目孔に延びる上糸を切断する上糸切断手段とを備えたミシンにおいて、上糸切断手段は、上糸用可動刃を含む上糸用糸切り機構と、この上糸用可動刃を縫針の直下で上糸を引っ掛ける糸取り位置とこの糸取り位置から所定距離離隔した糸切り位置とに亙って進退移動させる上糸用進退移動手段とを有し、上糸切断手段により糸切り位置で切断されて縫針の目孔へ延びる上糸の糸端を保持する上糸保持機構を設け、上糸用進退移動手段と上糸保持機構は、縫針の目孔から上糸保持機構へ延びる上糸の引っ張り方向を調節する為の上糸用方向調節機構を有するものである。   The sewing machine according to claim 1 is a sewing machine comprising a needle bar to which a sewing needle is attached, a rotary hook, and an upper thread cutting means for cutting an upper thread extending from a work cloth to a stitch hole of the sewing needle above the needle plate. The thread cutting means includes an upper thread thread trimming mechanism including an upper thread movable blade, a thread trimming position at which the upper thread movable blade is hooked immediately below the sewing needle, and a thread trimming position separated by a predetermined distance from the thread trimming position. An upper thread holding mechanism for holding the thread end of the upper thread which is cut at the thread trimming position by the upper thread cutting means and extends to the stitch hole of the sewing needle. The upper thread advancing / retreating means and the upper thread holding mechanism have an upper thread direction adjusting mechanism for adjusting the pulling direction of the upper thread extending from the stitch hole to the upper thread holding mechanism.

上糸切断に際して、上糸用進退移動手段により、上糸用可動刃が、待機中の糸切り位置から糸取り位置に移動して、縫針の直下で、加工布から縫針の目孔に延びる上糸を引っ掛けてから、元の糸切り位置に移動する。このとき、上糸用可動刃に引っ掛けられている上糸が上糸用糸切り機構により切断されるとともに、切断された上糸の糸端は上糸保持機構により保持される。この上糸保持状態において、縫針の目孔から上糸保持機構へ延びる上糸の引っ張り方向は、次回の縫製開始時における縫製方向と一致しないように、上糸用方向調節機構で調節される。   When cutting the upper thread, the upper thread movable blade moves from the standby thread trimming position to the thread take-up position by the upper thread advancing / retreating movement means, and the upper thread extending from the work cloth to the stitch hole of the sewing needle immediately below the sewing needle. After hooking, move to the original thread trimming position. At this time, the upper thread hooked on the upper thread movable blade is cut by the upper thread thread trimming mechanism, and the thread end of the cut upper thread is held by the upper thread holding mechanism. In this upper thread holding state, the upper thread direction adjusting mechanism is adjusted so that the pulling direction of the upper thread extending from the stitch hole of the sewing needle to the upper thread holding mechanism does not coincide with the sewing direction at the start of the next sewing.

このように、糸切り後に上糸保持機構により保持した上糸の糸端の引っ張り方向が、次の縫製開始時における縫製方向と一致しないように、上糸の糸保持方向を調節できるので、縫製開始後に糸端保持が解放されて糸端が加工布上に載置された際に、糸端の向きと縫製方向とが異なるため、糸端が加工布に縫い込まれることはない。   In this way, the thread holding direction of the upper thread can be adjusted so that the pulling direction of the upper thread thread held by the upper thread holding mechanism after thread trimming does not coincide with the sewing direction at the start of the next sewing. When the thread end holding is released after the start and the thread end is placed on the work cloth, the thread end is not sewn into the work cloth because the direction of the thread end is different from the sewing direction.

請求項２のミシンは、請求項１において、前記上糸用方向調節機構は、縫針側ほど下がる傾斜状に配設され且つ上糸用糸切り機構の上糸用可動刃を案内する上糸用案内部材と、この上糸用案内部材から延びた水平な上糸用張出し板と、この上糸用張出し板に形成された少なくとも１つの上糸用円弧スリットと、ミシン機枠に固定され且つ上糸用円弧スリットを介して上糸用張出し板に連結される上糸用支持部材とを有するものである。   A sewing machine according to a second aspect is the sewing machine according to the first aspect, wherein the direction adjusting mechanism for the upper thread is arranged in an inclined shape that is lowered toward the sewing needle side and guides the movable thread for the upper thread of the upper thread trimming mechanism. A guide member, a horizontal upper thread extension plate extending from the upper thread guide member, at least one upper thread arc slit formed on the upper thread extension plate, and fixed to the sewing machine frame and And an upper thread support member connected to the upper thread overhanging plate through the thread arc slit.

請求項３のミシンは、請求項１又は２において、針板の下方で加工布から回転釜に延びる下糸を切断する下糸切断手段を設け、下糸切断手段は、下糸用可動刃を含む下糸用糸切り機構と、この下糸用可動刃を針板の下側で下糸を引っ掛ける糸取り位置とこの糸取り位置から設定距離離隔した糸切り位置とに亙って進退移動させる下糸用進退移動手段とを有し、下糸切断手段により糸切り位置において切断されて回転釜のボビンケースの糸案内孔へ延びる下糸の糸端を保持する下糸保持機構を設けたものである。   The sewing machine of claim 3 is provided with a lower thread cutting means for cutting a lower thread extending from the work cloth to the rotary hook below the needle plate according to claim 1 or 2, wherein the lower thread cutting means has a lower thread movable blade. Lower thread that moves forward and backward through the thread trimming mechanism for lower thread and the thread trimming position where the lower thread movable blade is hooked on the lower side of the needle plate and the thread trimming position that is a set distance away from the thread trimming position. A lower thread holding mechanism that holds the yarn end of the lower thread that is cut at the thread cutting position by the lower thread cutting means and extends to the thread guide hole of the bobbin case of the rotary hook. .

請求項４のミシンは、請求項３において、前記下糸用進退移動手段と下糸保持機構は、回転釜のボビンケースの糸案内孔から下糸保持機構へ延びる下糸の引っ張り方向を調節する為の下糸用方向調節機構を有するものである。   The sewing machine of claim 4 is the sewing machine according to claim 3, wherein the lower thread advance / retreat means and the lower thread holding mechanism adjust the pulling direction of the lower thread extending from the thread guide hole of the bobbin case of the rotary hook to the lower thread holding mechanism. A mechanism for adjusting the direction of the lower thread.

請求項５のミシンは、請求項４において、前記下糸用進退移動手段は、平面視において、下糸の引っ張り方向を針落ち点からボビンケースの糸案内孔へ向かう方向と同一方向に設定可能に構成されたものである。   The sewing machine according to claim 5 is the sewing machine according to claim 4, wherein the advancing / retreating means for lower thread can set the pulling direction of the lower thread in the same direction as the direction from the needle drop point toward the thread guide hole of the bobbin case in a plan view. It is composed of.

請求項６のミシンは、請求項１〜５の何れかにおいて、前記上糸切断手段と上糸保持機構は、ミシンのアーム部の左側に配置されたものである。   According to a sixth aspect of the present invention, in the sewing machine of any one of the first to fifth aspects, the upper thread cutting means and the upper thread holding mechanism are arranged on the left side of the arm portion of the sewing machine.

請求項７のミシンは、請求項２において、前記上糸用方向調節機構は、上糸用案内部材が、加工布を押える布押え装置と干渉しない範囲で上糸の引っ張り方向を調節するように構成されたものである。   A sewing machine according to a seventh aspect is the sewing machine according to the second aspect, wherein the upper thread direction adjusting mechanism adjusts the pulling direction of the upper thread within a range in which the upper thread guide member does not interfere with the presser device for pressing the work cloth. It is configured.

請求項８のミシンは、請求項５において、前記下糸用方向調節機構は、下糸用糸切り機構の下糸用可動刃を案内する下糸用案内部材と、この下糸用案内部材から延びた水平な下糸用張出し板と、この下糸用張出し板に形成された少なくとも１つの下糸用円弧スリットと、ミシン機枠に固定され下糸用円弧スリッを介して下糸用張出し板に連結される下糸用締結部材を有するものである。   The sewing machine of claim 8 is the sewing machine according to claim 5, wherein the lower thread direction adjusting mechanism includes a lower thread guide member for guiding a lower thread movable blade for a lower thread thread trimming mechanism, and the lower thread guide member. An extended horizontal lower thread extending plate, at least one lower thread arc slit formed on the lower thread extending plate, and a lower thread extending plate fixed to the sewing machine frame via an lower thread circular slit The lower thread fastening member is connected to the lower thread.

請求項１の発明によれば、縫針を取付けた針棒と回転釜と上糸切断手段とを備え、上糸切断手段は上糸用糸切り機構と上糸用進退移動手段とを有し、上糸保持機構を設け、上糸用進退移動手段と上糸保持機構は上糸用方向調節機構を有するので、上糸用進退移動手段により、上糸用可動刃が糸取り位置に移動して上糸を引っ掛けた状態で元の糸切り位置に復帰移動して上糸が切断されたとき、加工布から延びる上糸の糸端部は所定長さの状態で上糸保持機構に保持させることができる。しかも、切断後に上糸保持機構により保持される上糸の糸端の引っ張り方向が、次の縫製開始時における縫製方向と一致しないように糸保持方向を調節しておけるので、縫製開始後に糸端保持が解放されて糸端が加工布上に載置された際に、糸端の向きと縫製方向とが異なるため、糸端の加工布への縫い込みを確実に防止することができる。   According to the invention of claim 1, it comprises a needle bar to which a sewing needle is attached, a rotary hook and an upper thread cutting means, and the upper thread cutting means has an upper thread thread trimming mechanism and an upper thread advance / retreat moving means, An upper thread holding mechanism is provided, and the upper thread advancement / retraction means and the upper thread holding mechanism have an upper thread direction adjustment mechanism, so that the upper thread movable blade moves to the thread take-up position by the upper thread advancement / retraction means. When the upper thread is cut by returning to the original thread trimming position with the thread hooked, the upper thread holding portion of the upper thread extending from the work cloth can be held by the upper thread holding mechanism in a predetermined length state. it can. In addition, the thread holding direction can be adjusted so that the pulling direction of the upper thread held by the upper thread holding mechanism after cutting does not match the sewing direction at the start of the next sewing. When the holding is released and the thread end is placed on the work cloth, the direction of the thread end and the sewing direction are different, so that the thread end can be reliably prevented from being sewn into the work cloth.

請求項２の発明によれば、前記上糸用方向調節機構は、縫針側ほど下がる傾斜状に配設され且つ上糸用糸切り機構の上糸用可動刃を案内する上糸用案内部材と、この上糸用案内部材から延びた水平な上糸用張出し板と、この上糸用張出し板に形成された少なくとも１つの上糸用円弧スリットと、ミシン機枠に固定され且つ上糸用円弧スリットを介して上糸用張出し板に連結される上糸用支持部材とを有するので、上糸用支持部材に連結された上糸用張出し板の上糸用円弧スリットを介して、上糸用案内部材の方向を傾斜状態を保持しながら容易に且つ迅速に調節することができる。その他請求項１と同様の効果を奏する。   According to a second aspect of the present invention, the upper thread direction adjusting mechanism is arranged in an inclined shape that is lowered toward the sewing needle side, and the upper thread guide member that guides the upper thread movable blade of the upper thread thread trimming mechanism; A horizontal upper thread extending plate extending from the upper thread guide member, at least one upper thread arc slit formed on the upper thread extending plate, and an upper thread arc fixed to the sewing machine frame. An upper thread support member connected to the upper thread overhanging plate through the slit, so that the upper thread support member is connected to the upper thread overhanging plate connected to the upper thread support member through the upper thread arc slit. The direction of the guide member can be easily and quickly adjusted while maintaining the inclined state. Other effects similar to those of the first aspect are obtained.

請求項３の発明によれば、下糸切断手段を設け、下糸切断手段は下糸用糸切り機構と下糸用進退移動手段とを有し、下糸保持機構を設けたので、下糸用進退移動手段により、下糸用可動刃が糸取り位置に移動して下糸を引っ掛けた状態で元の糸切り位置に復帰移動して下糸が切断されたとき、加工布から延びる下糸の糸端部は所定長さの状態で下糸保持機構に保持させることができる。その他請求項１又は２と同様の効果を奏する。   According to the invention of claim 3, the lower thread cutting means is provided, the lower thread cutting means has the lower thread thread cutting mechanism and the lower thread advance / retreat means, and the lower thread holding mechanism is provided. When the lower thread movable blade is moved to the thread take-up position and is moved back to the original thread trimming position and the lower thread is cut by the forward / backward movement means, the lower thread extending from the work cloth is The yarn end portion can be held by the lower yarn holding mechanism in a predetermined length state. Other effects similar to those of the first or second aspect are achieved.

請求項４の発明によれば、下糸用進退移動手段と下糸保持機構は、回転釜のボビンケースの糸案内孔から下糸保持機構へ延びる下糸の引っ張り方向を調節する為の下糸用方向調節機構を有するので、切断後に下糸保持機構により保持される下糸の糸端の引っ張り方向を、次の縫製開始時に縫い込まれないような方向に調節することができ、糸端の加工布への縫い込みを確実に防止することができる。その他請求項３と同様の効果を奏する。   According to the invention of claim 4, the bobbin thread advance / retreat means and the bobbin thread holding mechanism adjust the pulling direction of the bobbin thread extending from the thread guide hole of the bobbin case of the rotary hook to the bobbin thread holding mechanism. Since the thread direction pulling direction of the lower thread held by the lower thread holding mechanism after cutting can be adjusted so that it is not sewn at the start of the next sewing, Sewing into the work cloth can be reliably prevented. Other effects similar to those of the third aspect are achieved.

請求項５の発明によれば、前記下糸用進退移動手段は、平面視において、下糸の引っ張り方向を針落ち点からボビンケースの糸案内孔へ向かう方向と同一方向に設定可能に構成されたので、縫製開始時に解放された下糸の糸端部が縫い込まれることがない。その他請求項４と同様の効果を奏する。   According to the invention of claim 5, the lower thread advance / retreat means is configured to be able to set the pulling direction of the lower thread in the same direction as the direction from the needle drop point to the thread guide hole of the bobbin case in plan view. Therefore, the thread end portion of the lower thread released at the start of sewing is not sewn. Other effects similar to those of the fourth aspect are achieved.

請求項６の発明によれば、前記上糸切断手段と上糸保持機構は、ミシンのアーム部の左側に配置されたので、作業者が上糸を糸駒から縫針に糸掛けする糸掛け作業は、ミシンの右側であるため、これら上糸切断手段と上糸保持機構により、糸掛け作業を邪魔さることがなく、作業性がよい。その他請求項１〜５の何れかと同様の効果を奏する。   According to the invention of claim 6, since the upper thread cutting means and the upper thread holding mechanism are arranged on the left side of the arm portion of the sewing machine, the thread threading operation for the operator to thread the upper thread from the thread spool onto the sewing needle. Since this is the right side of the sewing machine, the upper thread cutting means and the upper thread holding mechanism do not obstruct the threading operation, and workability is good. Other effects similar to those of any one of claims 1 to 5 can be achieved.

請求項７のミシンは、前記上糸用方向調節機構は、上糸用案内部材が、加工布を押える布押え装置と干渉しない範囲で上糸の引っ張り方向を調節するように構成されたので、上糸用進退移動手段と上糸保持機構の引っ張り方向を、布押え装置との干渉を回避しながら調節することができる。その他請求項２と同様の効果を奏する。   The sewing machine according to claim 7, wherein the upper thread direction adjusting mechanism is configured to adjust the pulling direction of the upper thread within a range in which the upper thread guide member does not interfere with the presser device that presses the work cloth. The pulling direction of the upper thread advance / retreat means and the upper thread holding mechanism can be adjusted while avoiding interference with the presser foot device. Other effects similar to those of the second aspect are achieved.

請求項８のミシンは、前記下糸用方向調節機構は、下糸用糸切り機構の下糸用可動刃を案内する下糸用案内部材と、この下糸用案内部材から延びた水平な下糸用張出し板と、この下糸用張出し板に形成された少なくとも１つの下糸用円弧スリットと、ミシン機枠に固定され下糸用円弧スリッを介して下糸用張出し板に連結される下糸用締結部材を有するので、下糸用張出し板の下糸用円弧スリットを介して、下糸用案内部材の方向を容易に且つ迅速に調節することができる。その他請求項５と同様の効果を奏する。   The sewing machine according to claim 8, wherein the bobbin thread direction adjusting mechanism includes a bobbin thread guide member for guiding the bobbin thread movable blade for the bobbin thread trimming mechanism, and a horizontal lower thread extending from the bobbin thread guide member. A thread overhanging plate, at least one bobbin thread circular slit formed in the bobbin thread overhanging plate, and a lower thread fixed to the sewing machine frame and connected to the bobbin thread overhanging plate via an arc slit for bobbin thread Since the thread fastening member is provided, the direction of the lower thread guide member can be easily and quickly adjusted via the lower thread arc slit of the lower thread overhanging plate. Other effects similar to those of the fifth aspect are obtained.

ベッド部の上側に上糸切断装置と上糸保持機構と上糸方向調節機構とを設け、上糸切断装置で切断された後に上糸保持機構で保持される上糸の糸端を保持する保持方向（上糸の引っ張り方向）を調節でき、ベッド部の内部に下糸切断装置と下糸保持機構と下糸方向調節機構とを設け、下糸切断装置で切断された後に下糸保持機構で保持される下糸の糸端を保持する保持方向（下糸の引っ張り方向）を調節できるようにしてある。   An upper thread cutting device, an upper thread holding mechanism, and an upper thread direction adjusting mechanism are provided on the upper side of the bed, and holding the yarn end of the upper thread held by the upper thread holding mechanism after being cut by the upper thread cutting device. Direction (upper thread pulling direction) can be adjusted, and a lower thread cutting device, a lower thread holding mechanism and a lower thread direction adjusting mechanism are provided inside the bed, and after being cut by the lower thread cutting device, the lower thread holding mechanism The holding direction for holding the end of the lower thread to be held (the pulling direction of the lower thread) can be adjusted.

図１に示すように、パターン縫いミシン１は、ミシン本体部であるベッド部２と、ベッド部２に連続する脚柱部３と、脚柱部３からベッド部２と平行に延びるアーム部４とをミシンテーブル１３上に備えている。ベッド部２の上面部に針板５（図７参照）と布押え装置１５とが設けられている。   As shown in FIG. 1, a pattern sewing machine 1 includes a bed portion 2 that is a sewing machine body portion, a leg column portion 3 that is continuous with the bed portion 2, and an arm portion 4 that extends in parallel with the bed portion 2 from the leg column portion 3. Are provided on the sewing machine table 13. A needle plate 5 (see FIG. 7) and a presser foot device 15 are provided on the upper surface of the bed portion 2.

布押え装置１５は、縫製対象である加工布Ｗを布押え板１６と送り板１７とで保持しつつ、送り板１７をＸ軸駆動モータ９８により駆動されるＸ方向駆動機構（図示略）を介して主軸と直交する方向である左右方向(Ｘ方向)と、Ｙ軸駆動モータ９９により駆動されるＹ方向駆動機構（図示略）を介して主軸と平行方向である前後方向(Ｙ方向)とに移動させるものである。この布押え装置１５は図２に示すように、針板５上を前後左右に移動可能な送り板１７と、送り板１７上に設けられた押え腕１８と、その押え腕１８の前端部に昇降可能に取付けられた矩形枠状の布押え板１６等から構成されている。   The presser foot device 15 includes an X-direction drive mechanism (not shown) that drives the feed plate 17 by an X-axis drive motor 98 while holding the work cloth W to be sewn by the presser foot plate 16 and the feed plate 17. Via a Y-direction drive mechanism (not shown) driven by a Y-axis drive motor 99, and a front-rear direction (Y direction) parallel to the main axis. To be moved. As shown in FIG. 2, the presser foot device 15 includes a feed plate 17 that can move back and forth and right and left on the needle plate 5, a presser arm 18 provided on the feed plate 17, and a front end portion of the presser arm 18. It is composed of a rectangular frame-shaped cloth presser plate 16 attached so as to be movable up and down.

矩形枠状の布押え板（布保持枠）１６は、常には圧縮コイルバネ１９により付勢されて上昇しており、送り板１７から離れた上側に位置している。縫製に際して、アーム部４に取付けられた押えソレノイド２０の駆動によって、圧縮コイルバネ１９のバネ力に抗して押え腕１８が回動付勢されたときには、布押え板１６が送り板１７に接触する位置まで下降して、送り板１７との間に加工布Ｗを狭持しながら送り板１７と同期して、Ｘ方向とＹ方向とに移動可能になっている。   The rectangular frame-shaped cloth presser plate (cloth holding frame) 16 is always urged and raised by the compression coil spring 19 and is located on the upper side away from the feed plate 17. At the time of sewing, when the presser arm 18 is rotationally biased against the spring force of the compression coil spring 19 by driving the presser solenoid 20 attached to the arm portion 4, the presser plate 16 contacts the feed plate 17. The workpiece cloth W is lowered to the position and is movable in the X direction and the Y direction in synchronization with the feed plate 17 while sandwiching the work cloth W between the feed plate 17 and the feed plate 17.

アーム部４には、前後方向向きに主軸（図示略）が配設され、上下に往復移動する針棒８と天秤６（図３参照）が設けられ、針棒８の下端には縫針９が装着されている。針棒８の左側に押え棒１１が上下動可能に設けられ、この押え棒１１の下端部に、縫針９を挿通可能な円筒状の布押え１２が固着されている。上糸供給源である糸駒（図示略）から延びる上糸１４は、糸調子器７と天秤６と複数の糸案内１０を順々に経て、最終的に縫針９の目孔９ａに糸通しされている。   The arm 4 is provided with a main shaft (not shown) in the front-rear direction, a needle bar 8 that reciprocates up and down, and a balance 6 (see FIG. 3). A sewing needle 9 is attached to the lower end of the needle bar 8. It is installed. A presser bar 11 is provided on the left side of the needle bar 8 so as to be movable up and down, and a cylindrical cloth presser 12 through which the sewing needle 9 can be inserted is fixed to a lower end portion of the presser bar 11. An upper thread 14 extending from a thread spool (not shown) as an upper thread supply source passes through a thread tensioner 7, a balance 6, and a plurality of thread guides 10 in order, and finally passes through the eye 9 a of the sewing needle 9. Has been.

ベッド部２には、縫針９と協働して縫目を形成する垂直回転釜２２（図３参照）が設けられている。この垂直回転釜２２は、下糸ボビン（図示略）を収容したボビンケース２３を有する一般的な構造であり、その詳細な説明を省略する。下糸ボビンから延びる下糸２１はボビンケース２３の角部２３ａの糸案内孔２３ｂを経て、糸案内板２４と針板５を通ってベッド部２の上側に延びている。これら縫針９を取付けた針棒８と天秤６と垂直回転釜２２等から縫製手段が構成されている。   The bed 2 is provided with a vertical rotary hook 22 (see FIG. 3) that forms a seam in cooperation with the sewing needle 9. The vertical rotary hook 22 has a general structure having a bobbin case 23 in which a lower thread bobbin (not shown) is accommodated, and a detailed description thereof is omitted. The lower thread 21 extending from the lower thread bobbin extends to the upper side of the bed 2 through the thread guide plate 24 and the needle plate 5 through the thread guide hole 23b of the corner 23a of the bobbin case 23. Sewing means is constituted by the needle bar 8 to which the sewing needles 9 are attached, the balance 6, the vertical rotary hook 22 and the like.

図１に示すように、ミシンテーブル１３の下側に、制御ボックス２６が設けられている。この制御ボックス２６には、後述する制御装置９０や加圧エア供給系の駆動部が内蔵されている。ミシンテーブル１３の下側には、縫製動作の開始／終了と、布押え板１６の上昇動作と下降動作の切換え操作を行うためにペダル型の起動停止スイッチ２７が配置されている。   As shown in FIG. 1, a control box 26 is provided below the sewing machine table 13. The control box 26 incorporates a control device 90 and a drive unit for a pressurized air supply system, which will be described later. A pedal-type start / stop switch 27 is disposed below the sewing machine table 13 in order to start / end the sewing operation and to switch the lifting / lowering operation of the presser foot plate 16.

パターン縫いミシン１のアーム部４の前方左側近傍には、針板５の上方で加工布Ｗから縫針９の目孔９ａに延びる上糸１４を切断する上糸切断装置（上糸切断手段）３０と、上糸１４の糸端を保持する上糸保持機構３１と、上糸保持機構３１に上糸保持を解放させる上糸解放機構３２と、上糸方向調節機構３３が設けられている。   In the vicinity of the front left side of the arm portion 4 of the pattern sewing machine 1, an upper thread cutting device (upper thread cutting means) 30 for cutting the upper thread 14 extending from the work cloth W to the eye hole 9 a of the sewing needle 9 above the needle plate 5. An upper thread holding mechanism 31 that holds the end of the upper thread 14, an upper thread releasing mechanism 32 that causes the upper thread holding mechanism 31 to release upper thread holding, and an upper thread direction adjusting mechanism 33.

先ず、上糸切断装置３０について説明する。
この上糸切断装置３０は、第１可動刃（上糸用可動刃）４０を含む上糸切り機構（上糸用糸切り機構）３５と、この第１可動刃４０を進退移動させる上側進退移動機構（上糸用進退移動手段）３６と、これらの機構３５，３６を装着する第１本体フレーム３７等を有している。 First, the upper thread cutting device 30 will be described.
The upper thread cutting device 30 includes an upper thread trimming mechanism (upper thread thread trimming mechanism) 35 including a first movable blade (upper thread movable blade) 40, and an upper advance / retreat movement for moving the first movable blade 40 forward and backward. It has a mechanism (upper thread advancing / retreating means) 36 and a first main body frame 37 to which these mechanisms 35, 36 are mounted.

上糸切り機構３５は、所定長さを有する第１可動刃４０と、第１固定刃４１とを有し、第１本体フレーム３７（上糸用案内部材）に装備されている。第１本体フレーム３７は、図４〜図６に示すように、底壁部３７ａと、側壁部３７ｂと、先端壁部３７ｃ及び後端壁部３７ｅとを一体に構成されている。この先端壁部３７ｃは、その殆どの部分において高さ方向寸法を小さくした保持壁部３７ｄを有し、この保持壁部３７ｄの下端部に、第１可動刃４０を長さ方向にスライド可能に案内する案内溝３７ｆ（図６参照）が形成されている。   The upper thread trimming mechanism 35 includes a first movable blade 40 having a predetermined length and a first fixed blade 41, and is mounted on the first main body frame 37 (upper thread guide member). As shown in FIGS. 4 to 6, the first main body frame 37 is configured integrally with a bottom wall portion 37 a, a side wall portion 37 b, a front end wall portion 37 c and a rear end wall portion 37 e. The tip wall portion 37c has a holding wall portion 37d whose height direction dimension is reduced in almost all of the portion, and the first movable blade 40 can be slid in the length direction at the lower end portion of the holding wall portion 37d. A guide groove 37f (see FIG. 6) for guiding is formed.

第１可動刃４０は、所定幅を有する板部材からなり、先端壁部３７ｃの案内溝３７ｆに案内されて、縫針９の直下で上糸１４を引っ掛ける糸取り位置（図１５参照）と、この糸取り位置から縫針９の目孔９ａから針板５までの距離よりも長い所定距離離隔した糸切り位置（図３，図４参照）とに亙って進退移動可能になっている。第１可動刃４０の刃部４０ｂ（図６参照）は、第１可動刃４０の先端部に形成されたフック部４０ａに形成されている。第１固定刃４１は、先端壁部３７ｃの下側に固定螺子４２により固定された幅広の固定部４１ａと、この固定部４１ａの先端側に幅狭く形成された傾斜状の刃部４１ｂ（図６参照）を有している。   The first movable blade 40 is made of a plate member having a predetermined width, and is guided by the guide groove 37f of the tip wall portion 37c to hook the upper thread 14 directly below the sewing needle 9 (see FIG. 15), and the thread take-up position. It is possible to move forward and backward over a thread trimming position (see FIGS. 3 and 4) that is separated from the position by a predetermined distance longer than the distance from the eye hole 9 a of the sewing needle 9 to the needle plate 5. The blade portion 40b (see FIG. 6) of the first movable blade 40 is formed in a hook portion 40a formed at the tip portion of the first movable blade 40. The first fixed blade 41 includes a wide fixed portion 41a fixed to the lower side of the distal end wall portion 37c by a fixing screw 42, and an inclined blade portion 41b formed narrowly on the distal end side of the fixed portion 41a (see FIG. 6).

次に、上側進退移動機構３６について説明する。
図３〜図５に示すように、上側進退移動機構３６は、第１可動刃４０の後端部に連結された第１移動ブロック４４と、この第１移動ブロック４４を介して第１可動刃４０を進退移動させる第１進退エアシリンダ４５を有している。 Next, the upper side advance / retreat mechanism 36 will be described.
As shown in FIGS. 3 to 5, the upper forward / backward moving mechanism 36 includes a first moving block 44 connected to the rear end portion of the first movable blade 40, and the first movable blade via the first moving block 44. A first advancing / retreating air cylinder 45 that moves the advancing / retreating 40 is provided.

第１移動ブロック４４は、図４，図５に示すように正面視ほぼＬ字形状であり、ブロック状の移動本体部４４ａと、この移動本体部４４ａから上方に突出した解放連結部４４ｂとを有している。第１移動ブロック４４は、第１本体フレーム３７の底壁部３７ａの上面をスライド可能である。第１本体フレーム３７の後端壁部３７ｅの下側に第１進退エアシリンダ４５（第１エアシリンダ）の前端部が固定されている。   The first moving block 44 is substantially L-shaped when viewed from the front as shown in FIGS. 4 and 5, and includes a block-shaped moving main body 44a and a release connecting portion 44b protruding upward from the moving main body 44a. Have. The first moving block 44 can slide on the upper surface of the bottom wall portion 37 a of the first main body frame 37. A front end portion of a first advance / retreat air cylinder 45 (first air cylinder) is fixed to the lower side of the rear end wall portion 37e of the first main body frame 37.

この第１進退エアシリンダ４５から前方に延びるピストンロッド４５ａの先端部が移動本体部４４ａの後端部に連結されるとともに、移動本体部４４ａの前端部に第１可動刃４０の後端部が連結されている。この第１進退エアシリンダ４５の直径は約１０mmで、しかもこの進出ストロークは約６０mmになっている。   The front end portion of the piston rod 45a extending forward from the first advance / retreat air cylinder 45 is connected to the rear end portion of the moving main body portion 44a, and the rear end portion of the first movable blade 40 is connected to the front end portion of the moving main body portion 44a. It is connected. The diameter of the first advance / retreat air cylinder 45 is about 10 mm, and the advance stroke is about 60 mm.

次に、上糸切り機構３５により切断された上糸１４の糸端１４ｂを保持する上糸保持機構３１について説明する。ここで、上糸切断機構３０と上糸保持機構３１は、夫々パターン縫いミシン１のアーム部４の左側に配置されている。それ故、作業者が上糸１４を糸駒から縫針９に糸掛けする糸掛け作業は、パターン縫いミシン１の右側であるため、これら上糸切断機構３０と上糸保持機構３１により糸掛け作業を邪魔さることがなく、作業性がよい。   Next, the upper thread holding mechanism 31 that holds the yarn end 14b of the upper thread 14 cut by the upper thread trimming mechanism 35 will be described. Here, the upper thread cutting mechanism 30 and the upper thread holding mechanism 31 are arranged on the left side of the arm portion 4 of the pattern sewing machine 1, respectively. Therefore, the thread threading operation for the operator to thread the upper thread 14 from the thread spool onto the sewing needle 9 is on the right side of the pattern sewing machine 1, so that the thread threading work is performed by the upper thread cutting mechanism 30 and the upper thread holding mechanism 31. The workability is good.

図４，図５に示すように、上糸保持機構３１は、第１本体フレーム３７の保持壁部３７ｄの上側に配置された第１保持バネ４７と、この第１保持バネ４７の保持力を調節する第１板バネ４８及びこのバネ力を調節する調節螺子４９等を有している。   As shown in FIGS. 4 and 5, the upper thread holding mechanism 31 has a first holding spring 47 disposed on the upper side of the holding wall portion 37 d of the first main body frame 37 and the holding force of the first holding spring 47. A first leaf spring 48 for adjusting, an adjusting screw 49 for adjusting the spring force, and the like are provided.

第１保持バネ４７は、矩形状の弾性板部材からなり、後端部において固定螺子５０で保持壁部３７ｄの上側に固定されるとともに、段落ちした前端部において、第１可動刃４０の前端部に上側から弾性付勢されている。第１板バネ４８は、第１保持バネ４７の上側に重ねるように配置され、後端部において固定螺子５０で保持壁部３７ｄの上側に固定されるとともに、前端部で第１保持バネ４７を下側に付勢している。調節螺子４９は、保持壁部３７ｄに螺合され、直ぐ下側の第１板バネ４８を第１保持バネ４７に付勢させる付勢力、つまり第１可動刃４０と第１保持バネ４７との間で上糸１４の端部を保持する保持力を調節可能になっている。   The first holding spring 47 is formed of a rectangular elastic plate member, and is fixed to the upper side of the holding wall portion 37d by a fixing screw 50 at the rear end portion, and the front end of the first movable blade 40 at the stepped front end portion. The portion is elastically biased from above. The first leaf spring 48 is disposed so as to overlap the upper side of the first holding spring 47, and is fixed to the upper side of the holding wall portion 37d by a fixing screw 50 at the rear end portion, and the first holding spring 47 is attached to the front end portion. It is energizing downward. The adjusting screw 49 is screwed into the holding wall portion 37 d and biasing force that biases the first leaf spring 48 immediately below the first holding spring 47, that is, the first movable blade 40 and the first holding spring 47. The holding force for holding the end portion of the upper thread 14 can be adjusted.

次に、上糸保持機構３１に上糸保持を解放させる上糸解放機構３２について説明する。
図４，図５に示すように、上糸解放機構３２は、第１解放エアシリンダ５３（上糸解放駆動手段の一部であり、第２エアシリンダ）と、第１移動ブロック４４と、第１可動刃４０等を有している。第１本体フレーム３７の後端壁部３７ｅの上側に第１解放エアシリンダ５３の前端部が固定されている。この第１解放エアシリンダ５３から前方に延びるピストンロッド５３ａの先端部が第１移動ブロック４４の解放連結部４４ｂに連結されている。この第１解放エアシリンダ５３の直径は約２０mmで、しかもこの進出ストロークは約１０mmになっている。 Next, the upper thread releasing mechanism 32 that causes the upper thread holding mechanism 31 to release the upper thread holding will be described.
As shown in FIGS. 4 and 5, the upper thread release mechanism 32 includes a first release air cylinder 53 (a part of the upper thread release drive means, the second air cylinder), a first moving block 44, 1 has a movable blade 40 and the like. The front end portion of the first release air cylinder 53 is fixed to the upper side of the rear end wall portion 37e of the first main body frame 37. A tip end portion of a piston rod 53 a extending forward from the first release air cylinder 53 is connected to a release connection portion 44 b of the first moving block 44. The diameter of the first release air cylinder 53 is about 20 mm, and the advance stroke is about 10 mm.

このように、第１解放エアシリンダ５３のストロークは第１進退エアシリンダ４５のストロークよりも短く設定されている。また、第１解放エアシリンダ５３の直径が第１進退エアシリンダ４５の直径よりも大きいため、同じエア圧力を供給した場合、第１解放エアシリンダ５３の駆動力は第１進退エアシリンダ４５の駆動力よりも強くなる。それ故、第１進退エアシリンダ４５のピストンロッド４５ａが後退駆動された状態で第１解放エアシリンダ５３を進出駆動させることができる。   Thus, the stroke of the first release air cylinder 53 is set shorter than the stroke of the first advance / retreat air cylinder 45. Further, since the diameter of the first release air cylinder 53 is larger than the diameter of the first advance / retreat air cylinder 45, when the same air pressure is supplied, the driving force of the first release air cylinder 53 is the drive of the first advance / retreat air cylinder 45. Be stronger than power. Therefore, the first release air cylinder 53 can be driven to advance while the piston rod 45a of the first advance / retreat air cylinder 45 is driven backward.

つまり、第１可動刃４０の先端部と第１保持バネ４７とで上糸１４の糸端１４ｂを保持する上糸保持状態であっても、第１解放エアシリンダ５３が進出駆動された場合、第１進退エアシリンダ４５のピストンロッド４５ａは第１移動ブロック４４と共に前進する。すると、第１可動刃４０が前方に約１０mmだけ移動し、上糸保持機構３１による糸端１４ｂの上糸保持が解放される。   That is, even when the first release air cylinder 53 is driven to advance even in the upper thread holding state in which the tip end portion of the first movable blade 40 and the first holding spring 47 hold the thread end 14b of the upper thread 14, The piston rod 45 a of the first advance / retreat air cylinder 45 moves forward together with the first moving block 44. Then, the first movable blade 40 moves forward by about 10 mm, and the upper thread holding by the upper thread holding mechanism 31 is released.

次に、縫針９の目孔９ａから延びる上糸１４の引っ張り方向を調節する上糸方向調節機構（上糸用方向方向調節機構）３３について説明する。
図４〜図６に示すように、上糸方向調節機構３３は、前述した第１本体フレーム３７と、１対の円弧スリット（上糸用円弧スリット）５５ａが形成された第１張出し板（上糸用張出し板）５５と、支持部材（上糸用支持部材）５６等を有している。 Next, an upper thread direction adjusting mechanism (upper thread direction adjusting mechanism) 33 for adjusting the pulling direction of the upper thread 14 extending from the eye hole 9a of the sewing needle 9 will be described.
As shown in FIGS. 4 to 6, the upper thread direction adjusting mechanism 33 includes a first overhang plate (upper thread) on which the first main body frame 37 and a pair of circular slits (upper thread circular arc slits) 55a are formed. And a support member (support member for upper thread) 56 and the like.

第１張出し板５５は、平面視にて湾曲状に形成され、２つの円弧スリット５５ａを所定間隔おきに湾曲状に形成するとともに、後端から下方に曲げ形成された固定部５５ｂを一体形成している。第１本体フレーム３７は側壁部３７ｂを固定部５５ｂに固定ボルト５７で固着されている。この場合、第１本体フレーム３７は、固定部５５ｂにより、先端壁部３７ｃ側を低く、つまり縫針９側ほど下がる傾斜状に配設されている。パターン縫いミシン１の前端部に左右方向向きの支持部材５６が固定ボルト５６ａで固着され、この支持部材５６の左端部分に、第１張出し板５５が１対の円弧スリット５５ａを介して固定ボルト５８で位置調節可能に連結されている。   The first overhanging plate 55 is formed in a curved shape in a plan view, and two arc slits 55a are formed in a curved shape at a predetermined interval, and a fixed portion 55b bent downward from the rear end is integrally formed. ing. The first main body frame 37 has a side wall portion 37b fixed to a fixing portion 55b with fixing bolts 57. In this case, the 1st main body frame 37 is arrange | positioned by the fixing | fixed part 55b at the inclination shape which the tip wall part 37c side is made low, ie, the sewing needle 9 side falls. A support member 56 facing in the left-right direction is fixed to the front end portion of the pattern sewing machine 1 with a fixing bolt 56a. A first overhanging plate 55 is fixed to the left end portion of the support member 56 via a pair of arc slits 55a. It is connected so that the position can be adjusted.

即ち、図５，図７に示すように、第１本体フレーム３７は、平面視にてＸ方向に対して時計回りに約１３°傾いてパターン縫いミシン１に固定されている。それ故、図７に示すように、第１本体フレーム３７は、布押え装置１５の布押え板１６よりも後側で、しかも布押え装置１５の押え腕１８の前端部に左方から干渉しない範囲で上糸１４の引っ張り方向を調節できるように構成されている。   That is, as shown in FIGS. 5 and 7, the first main body frame 37 is fixed to the pattern sewing machine 1 by tilting about 13 ° clockwise with respect to the X direction in plan view. Therefore, as shown in FIG. 7, the first main body frame 37 does not interfere with the front end portion of the presser arm 18 of the presser device 15 from the left side behind the presser plate 16 of the presser device 15. It is comprised so that the pull direction of the upper thread | yarn 14 can be adjusted in the range.

それ故、第１本体フレーム３７の方向、つまり上糸１４の引っ張り方向は、図７に示す時計回り限界方向から、図１７に示すように、Ｘ方向に平行な反時計回り限界方向にまで調節可能になっている。但し、第１本体フレーム３７の向きを上糸方向調節機構３３を介して調節する場合、第１本体フレーム３７は湾曲状の１対の円弧スリット５５ａを介して必ず縫針９方向を向くようになっている。   Therefore, the direction of the first main body frame 37, that is, the pulling direction of the upper thread 14, is adjusted from the clockwise limit direction shown in FIG. 7 to the counterclockwise limit direction parallel to the X direction as shown in FIG. It is possible. However, when the direction of the first main body frame 37 is adjusted via the upper thread direction adjusting mechanism 33, the first main body frame 37 is always directed to the sewing needle 9 direction via the pair of curved arc slits 55a. ing.

次に、図８〜図１０に示すように、パターン縫いミシン１のベッド部２において、垂直回転釜２２の左側近傍には、針板５の下方で加工布Ｗから垂直回転釜２２に延びる下糸２１を切断する下糸切断装置６０（下糸切断手段）と、下糸２１の糸端２１ｂを保持する下糸保持機構６１と、下糸保持機構６１に下糸保持を解放させる下糸解放機構６２と、下糸方向調節機構（下糸用方向調節手段）６３が設けられている。   Next, as shown in FIGS. 8 to 10, in the bed portion 2 of the pattern stitching sewing machine 1, in the vicinity of the left side of the vertical rotary hook 22, there is a lower portion extending from the work cloth W to the vertical rotary hook 22 below the needle plate 5. A lower thread cutting device 60 (lower thread cutting means) that cuts the thread 21, a lower thread holding mechanism 61 that holds the thread end 21b of the lower thread 21, and a lower thread release that causes the lower thread holding mechanism 61 to release lower thread holding. A mechanism 62 and a lower thread direction adjusting mechanism (lower thread direction adjusting means) 63 are provided.

先ず、下糸切断装置６０について説明する。
この下糸切断装置６０は、第２可動刃（下糸用可動刃）７０を含む下糸切り機構（下糸用糸切り機構）６５と、この第２可動刃７０を進退移動させる下側進退移動機構（下糸用進退移動手段）６６と、これらの機構６５，６６を装着する第２本体フレーム６７等を有している。 First, the lower thread cutting device 60 will be described.
The lower thread cutting device 60 includes a lower thread trimming mechanism (lower thread thread trimming mechanism) 65 including a second movable blade (lower thread movable blade) 70 and a lower side advance / retreat mechanism that moves the second movable blade 70 forward and backward. It has a moving mechanism (lower thread advancing / retreating means) 66 and a second main body frame 67 on which these mechanisms 65 and 66 are mounted.

下糸切り機構６５は、所定長さを有する第２可動刃７０と、第２固定刃７１とを有し、第２本体フレーム（下糸用案内部材）６７に装備されている。第２本体フレーム６７は、図８〜図１０に示すように、底壁部６７ａと、側壁部６７ｂと、先端壁部６７ｃ及び後端壁部６７ｅとを一体に構成されている。この先端壁部６７ｃは、その殆どの部分において高さ方向寸法を小さくした保持壁部６７ｄを有し、この保持壁部６７ｄの上面に、第２可動刃７０を長さ方向にスライド可能に案内する案内溝６７ｆ（図１０参照）が形成されている。   The lower thread trimming mechanism 65 includes a second movable blade 70 having a predetermined length and a second fixed blade 71, and is mounted on a second main body frame (lower thread guide member) 67. As shown in FIGS. 8 to 10, the second main body frame 67 includes a bottom wall portion 67 a, a side wall portion 67 b, a front end wall portion 67 c and a rear end wall portion 67 e that are integrally formed. The tip wall portion 67c has a holding wall portion 67d having a smaller height dimension in most of the portion, and the second movable blade 70 is slidably guided in the length direction on the upper surface of the holding wall portion 67d. A guide groove 67f (see FIG. 10) is formed.

第２可動刃７０は、所定幅を有する板部材からなり、先端壁部６７ｃの案内溝６７ｆに案内されて、針板５の下側で下糸２１を引っ掛ける糸取り位置（図１８参照）と、この糸取り位置から所定距離離隔した糸切り位置（図３，図８参照）とに亙って進退移動可能になっている。第２可動刃７０の刃部７０ｂ（図１０参照）は、第２可動刃７０の先端部に形成されたフック部７０ａに形成されている。第２固定刃７１は、先端壁部６７ｃの上側に固定螺子７２により固定された幅広の固定部７１ａと、この固定部７１ａの先端側に幅狭く形成された傾斜状の刃部７１ｂ（図１０参照）を有している。   The second movable blade 70 is made of a plate member having a predetermined width, and is guided by the guide groove 67f of the distal end wall portion 67c to hook the lower thread 21 on the lower side of the needle plate 5 (see FIG. 18), Advancing and retreating movement is possible over a thread trimming position (see FIGS. 3 and 8) separated by a predetermined distance from the thread take-up position. The blade portion 70b (see FIG. 10) of the second movable blade 70 is formed on a hook portion 70a formed at the tip portion of the second movable blade 70. The second fixed blade 71 has a wide fixed portion 71a fixed to the upper side of the distal end wall portion 67c by a fixing screw 72, and an inclined blade portion 71b formed narrowly on the front end side of the fixed portion 71a (FIG. 10). See).

次に、下側進退移動機構６６について説明する。
図３，図８〜図９に示すように、下側進退移動機構６６は、第２可動刃７０の後端部に連結された第２移動ブロック７４と、この第２移動ブロック７４を介して第２可動刃７０を進退移動させる第２進退エアシリンダ７５を有している。 Next, the lower side advance / retreat moving mechanism 66 will be described.
As shown in FIGS. 3 and 8 to 9, the lower side advance / retreat movement mechanism 66 includes a second movement block 74 connected to the rear end portion of the second movable blade 70, and the second movement block 74. A second forward / backward air cylinder 75 for moving the second movable blade 70 forward and backward is provided.

第２移動ブロック７４は、図８，図９に示すように正面視ほぼＬ字形状であり、ブロック状の移動本体部７４ａと、この移動本体部７４ａから下方に突出した解放連結部７４ｂとを有している。第２移動ブロック７４は、第２本体フレーム６７の底壁部６７ａの上面をスライド可能になっている。第２本体フレーム６７の後端壁部６７ｅの上側に第２進退エアシリンダ７５の前端部が固定されている。この第２進退エアシリンダ７５から前方に延びるピストンロッド７５ａの先端部が移動本体部７４ａの後端部に連結されるとともに、移動本体部７４ａの前端部に第２可動刃７０の後端部が連結されている。この第２進退エアシリンダ７５の直径は約１０mmで、しかもこの進出ストロークは約６０mmになっている。   As shown in FIGS. 8 and 9, the second moving block 74 is substantially L-shaped when viewed from the front, and includes a block-shaped moving main body 74a and a release connecting portion 74b protruding downward from the moving main body 74a. Have. The second moving block 74 is slidable on the upper surface of the bottom wall portion 67 a of the second main body frame 67. The front end portion of the second advancing / retreating air cylinder 75 is fixed to the upper side of the rear end wall portion 67e of the second main body frame 67. The front end portion of the piston rod 75a extending forward from the second forward / backward air cylinder 75 is connected to the rear end portion of the moving main body portion 74a, and the rear end portion of the second movable blade 70 is connected to the front end portion of the moving main body portion 74a. It is connected. The diameter of the second advance / retreat air cylinder 75 is about 10 mm, and the advance stroke is about 60 mm.

次に、下糸切り機構６５により切断された下糸２１の糸端２１ｂを保持する下糸保持機構６１について説明する。ここで、下糸切断機構６０と下糸保持機構６１は、夫々パターン縫いミシン１の垂直回転釜２２の左側に配置されている。
図８，図９に示すように、下糸保持機構６１は、第２本体フレーム６７の保持壁部６７ｄの下側に配置された第２保持バネ７７と、この第２保持バネ７７の保持力を調節する第２板バネ７８及びこのバネ力を調節する調節螺子７９等を有している。 Next, the lower thread holding mechanism 61 that holds the yarn end 21b of the lower thread 21 cut by the lower thread trimming mechanism 65 will be described. Here, the lower thread cutting mechanism 60 and the lower thread holding mechanism 61 are arranged on the left side of the vertical rotary hook 22 of the pattern sewing machine 1, respectively.
As shown in FIGS. 8 and 9, the lower thread holding mechanism 61 includes a second holding spring 77 disposed on the lower side of the holding wall portion 67 d of the second main body frame 67 and the holding force of the second holding spring 77. A second leaf spring 78 for adjusting the spring force, an adjusting screw 79 for adjusting the spring force, and the like.

第２保持バネ７７は、矩形状の弾性板部材からなり、後端部において固定螺子８０で保持壁部６７ｄの下側に固定されるとともに、段落ちした前端部において、第２可動刃７０の前端部に下側から弾性付勢されている。第２板バネ７８は、第２保持バネ７７の下側に重ねるように配置され、後端部において固定螺子８０で保持壁部６７ｄの下側に固定されるとともに、前端部で第２保持バネ７７を上側に付勢している。調節螺子７９は、保持壁部６７ｄに螺合され、直ぐ上側の第２板バネ７８を第２保持バネ７７に付勢させる付勢力、つまり第２可動刃７０と第２保持バネ７７との間で下糸２１の端部を保持する保持力を調節可能になっている。   The second holding spring 77 is formed of a rectangular elastic plate member, and is fixed to the lower side of the holding wall portion 67d by a fixing screw 80 at the rear end portion, and at the front end portion where the second movable blade 70 is dropped. The front end is elastically biased from below. The second leaf spring 78 is disposed so as to overlap the lower side of the second holding spring 77, and is fixed to the lower side of the holding wall portion 67d by a fixing screw 80 at the rear end portion, and at the front end portion, the second holding spring. 77 is biased upward. The adjusting screw 79 is screwed into the holding wall portion 67d and biases the second plate spring 78 immediately above the second holding spring 77, that is, between the second movable blade 70 and the second holding spring 77. Thus, the holding force for holding the end portion of the lower thread 21 can be adjusted.

次に、下糸保持機構６１に下糸保持を解放させる下糸解放機構６２について説明する。
図８，図９に示すように、下糸解放機構６２は、第２解放エアシリンダ８３と、第２移動ブロック７４と、第２可動刃７０等を有している。第２本体フレーム６７の後端壁部６７ｅの下側に第２解放エアシリンダ８３の前端部が固定されている。この第２解放エアシリンダ８３から右方に延びるピストンロッド８３ａの先端部が第２移動ブロック７４の解放連結部７４ｂに連結されている。この第２解放エアシリンダ８３の直径は約２０mmで、しかもこの進出ストロークは約１０mmになっている。 Next, the lower thread releasing mechanism 62 that causes the lower thread holding mechanism 61 to release the lower thread holding will be described.
As shown in FIGS. 8 and 9, the lower thread release mechanism 62 includes a second release air cylinder 83, a second moving block 74, a second movable blade 70, and the like. The front end portion of the second release air cylinder 83 is fixed to the lower side of the rear end wall portion 67e of the second main body frame 67. A tip end portion of a piston rod 83 a extending rightward from the second release air cylinder 83 is connected to a release connection portion 74 b of the second moving block 74. The diameter of the second release air cylinder 83 is about 20 mm, and the advance stroke is about 10 mm.

このように、第２解放エアシリンダ８３のストロークは第２進退エアシリンダ７５のストロークよりも短く設定されている。また、第２解放エアシリンダ８３の直径が第２進退エアシリンダ７５の直径よりも大きいため、同じエア圧力を供給した場合、第２解放エアシリンダ８３の駆動力は第２進退エアシリンダ７５の駆動力よりも強くなる。それ故、第２進退エアシリンダ７５のピストンロッド７５ａが後退駆動された状態で第２解放エアシリンダ８３を進出駆動させることができる。   Thus, the stroke of the second release air cylinder 83 is set shorter than the stroke of the second advance / retreat air cylinder 75. Further, since the diameter of the second release air cylinder 83 is larger than the diameter of the second advance / retreat air cylinder 75, when the same air pressure is supplied, the driving force of the second release air cylinder 83 is the drive of the second advance / retreat air cylinder 75. Be stronger than power. Therefore, the second release air cylinder 83 can be driven to advance while the piston rod 75a of the second advance / retreat air cylinder 75 is driven backward.

つまり、第２可動刃７０の先端部と第２保持バネ７７とで下糸２１の糸端２１ｂを保持する下糸保持状態であっても、第２解放エアシリンダ８３が進出駆動された場合、第２進退エアシリンダ７５のピストンロッド７５ａは第２移動ブロック７４と共に前進する。すると、第２可動刃７０が前方に約１０mmだけ移動し、下糸保持機構６１による糸端２１ｂの下糸保持が解放される。   That is, even when the second release air cylinder 83 is driven to advance even in the lower thread holding state in which the tip end portion of the second movable blade 70 and the second holding spring 77 hold the thread end 21b of the lower thread 21, The piston rod 75 a of the second advance / retreat air cylinder 75 moves forward together with the second moving block 74. Then, the second movable blade 70 moves forward by about 10 mm, and the lower thread holding by the lower thread holding mechanism 61 is released.

次に、垂直回転釜２２のボビンケース２３の糸案内孔２３ｂから下糸保持機構６１へ延びる下糸２１の引っ張り方向を調節する為の下糸方向調節機構（下糸用方向調節機構）６３について説明する。
図８〜図１０に示すように、下糸方向調節機構６３は、前述した第２本体フレーム６７と、１対の円弧スリット（下糸用円弧スリット）８５ａが形成された第２張出し板（下糸用張出し板）８５と、固定ボルト８６（下糸用締結部材）等を有している。 Next, a lower thread direction adjusting mechanism (lower thread direction adjusting mechanism) 63 for adjusting the pulling direction of the lower thread 21 extending from the thread guide hole 23b of the bobbin case 23 of the vertical rotary hook 22 to the lower thread holding mechanism 61. explain.
As shown in FIGS. 8 to 10, the lower thread direction adjusting mechanism 63 includes a second overhang plate (lower thread) in which the second main body frame 67 and a pair of circular slits (lower circular arc slits) 85a are formed. And a fixing bolt 86 (lower thread fastening member) and the like.

第２張出し板８５は、平面視にて湾曲状に形成され、２つの円弧スリット８５ａを所定間隔おきに形成するとともに、前端から下方に曲げ形成された固定部８５ｂを一体形成している。第２本体フレーム６７は側壁部６７ｂを固定部８５ｂに固定ボルト８７で固着されている。この場合、第２本体フレーム６７は、固定部８５ｂにより、先端壁部６７ｃ側を高く、つまり縫針９側ほど上がる傾斜状に配設されている。パターン縫いミシン１のベッド部２に、１対の円弧スリット８５ａを介して第２張出し板８５が下側から固定ボルト８６で固定されている。   The second overhanging plate 85 is formed in a curved shape in plan view, and two arc slits 85a are formed at predetermined intervals, and a fixed portion 85b that is bent downward from the front end is integrally formed. In the second main body frame 67, the side wall portion 67b is fixed to the fixing portion 85b with fixing bolts 87. In this case, the 2nd main body frame 67 is arrange | positioned by the fixing | fixed part 85b so that the front-end | tip wall part 67c side may become high, ie, may be inclined like the sewing needle 9 side. The second overhanging plate 85 is fixed to the bed portion 2 of the pattern stitching sewing machine 1 with a fixing bolt 86 from below through a pair of arc slits 85a.

即ち、図９に示すように、第２本体フレーム６７は、平面視にてＸ方向に対して反時計回りに約４５°傾けてベッド部２の下面に固定されている。それ故、図９に示すように、平面視において、下糸２１の引っ張り方向を針板５の針落ち点５ａからボビンケース２３の糸案内孔２３ｂへ向かう方向と同一方向に設定可能に構成されている。このように、第２本体フレーム６７の方向、つまり下糸２１の引っ張り方向は、図９に示す反時計回り限界方向から、図２０に示すように、Ｘ方向に対して約２０°反時計回り限界方向にまで調節可能になっている。   That is, as shown in FIG. 9, the second main body frame 67 is fixed to the lower surface of the bed portion 2 by tilting about 45 ° counterclockwise with respect to the X direction in plan view. Therefore, as shown in FIG. 9, in plan view, the pulling direction of the lower thread 21 can be set in the same direction as the direction from the needle drop point 5a of the needle plate 5 toward the thread guide hole 23b of the bobbin case 23. ing. As described above, the direction of the second main body frame 67, that is, the pulling direction of the lower thread 21, is about 20 ° counterclockwise from the counterclockwise limit direction shown in FIG. 9 with respect to the X direction as shown in FIG. Adjustable to the limit direction.

次に、このパターン縫いミシン１の制御系について説明する。
図１１に示すように、制御装置９０は、ＣＰＵ９１とＲＯＭ９２とＲＡＭ９３等を含むコンピュータから構成されている。この制御装置９０には、起動停止スイッチ９４と、押え腕１８を押え位置と押え解除位置とに切換える為の押えスイッチ９５と、主軸の回転角度を検出する回転角度検出センサ９６と、ミシンモータ９７の為の駆動回路１００と、押え腕１８を押え位置に切換え可能な押えソレノイド２０の為の駆動回路１０１と、Ｘ軸駆動モータ９８の為の駆動回路１０２と、Ｙ軸駆動モータ９９の為の駆動回路１０３とが夫々接続されている。 Next, the control system of the pattern sewing machine 1 will be described.
As shown in FIG. 11, the control device 90 includes a computer including a CPU 91, a ROM 92, a RAM 93, and the like. The control device 90 includes a start / stop switch 94, a presser switch 95 for switching the presser arm 18 between a presser position and a presser release position, a rotation angle detection sensor 96 for detecting the rotation angle of the main shaft, and a sewing machine motor 97. Drive circuit 100, a drive circuit 101 for a presser solenoid 20 capable of switching the presser arm 18 to the presser position, a drive circuit 102 for an X-axis drive motor 98, and a Y-axis drive motor 99. A drive circuit 103 is connected to each other.

ＲＯＭ９２には、パターン縫いミシン１を制御する各種の制御プログラム、縫製する為の複数種類の縫製データ等が予め格納されている。これら複数種類の縫製データの各々には、図１２に示すように、第１針目から最終の第ｎ針目の針落ち位置データに加えて、第２針目と第３針目の間に、下糸２１を解放させる為の下糸解放指令コードと、上糸１４を解放させる為の上糸解放指令コードとが夫々追加して予め記憶されている。第ｎ針目針落ちデータの次に、上糸１４を切断する為の上糸切断指令コードと、下糸２１を切断する為の下糸切断指令コードとが夫々追加して記憶されている。   The ROM 92 stores in advance various control programs for controlling the pattern sewing machine 1, a plurality of types of sewing data for sewing, and the like. As shown in FIG. 12, each of the plurality of types of sewing data includes a lower thread 21 between the second stitch and the third stitch in addition to the needle drop position data from the first stitch to the final n-th stitch. A lower thread release command code for releasing the upper thread 14 and an upper thread release command code for releasing the upper thread 14 are added and stored in advance. Following the nth stitch entry data, an upper thread cutting command code for cutting the upper thread 14 and a lower thread cutting command code for cutting the lower thread 21 are additionally stored.

ＲＡＭ９３には、ＣＰＵ９１で演算した演算結果を一時的に格納するメモリ、ワークメモリ等、パターン模様を縫製処理したり、後述する布送り制御を実行するに際して必要なカウンタメモリやバッファが適宜設けられている。   The RAM 93 is appropriately provided with a counter memory and a buffer which are necessary for sewing processing of a pattern pattern and executing a cloth feed control to be described later, such as a memory and a work memory for temporarily storing calculation results calculated by the CPU 91. Yes.

制御装置９０には、更に、第１進退電磁切換え弁１０４と、第１解放電磁切換え弁１０５と、第２進退電磁切換え弁１０６と、第２解放電磁切換え弁１０７の為の駆動回路１１０〜１１３が夫々接続されている。但し、これら第１，第２進退電磁切換え弁１０４，１０６と、第１，第２解放電磁切換え弁１０５，１０７は、排気絞り弁１０４Ａ〜１０７Ａ，１０４Ｂ〜１０７Ｂを夫々内蔵している。先ず、第１，第２進退エアシリンダ４５，７５への加圧エア供給系について簡単に説明する。   The controller 90 further includes drive circuits 110 to 113 for the first forward / backward electromagnetic switching valve 104, the first release electromagnetic switching valve 105, the second forward / backward electromagnetic switching valve 106, and the second release electromagnetic switching valve 107. Are connected to each other. However, the first and second forward / backward electromagnetic switching valves 104 and 106 and the first and second release electromagnetic switching valves 105 and 107 have exhaust throttle valves 104A to 107A and 104B to 107B, respectively. First, the pressurized air supply system to the first and second advance / retreat air cylinders 45 and 75 will be briefly described.

図１３−１（図１３−３）に示すように、第１進退エアシリンダ４５（第２進退エアシリンダ７５）は複動型であり、エア供給源１１５からの加圧エアが第１進退電磁切換え弁１０４（第２進退電磁切換え弁１０６）で切換えられる。即ち、進出駆動時には、加圧エアは第１進退エアシリンダ４５（第２進退エアシリンダ７５）の進出側ポートに供給され、後退駆動時には加圧エアは第１進退エアシリンダ４５（第２進退エアシリンダ７５）の後退側ポートに供給される。   As shown in FIG. 13-1 (FIG. 13-3), the first advancing / retreating air cylinder 45 (second advancing / retreating air cylinder 75) is a double-acting type, and the pressurized air from the air supply source 115 is a first advancing / retracting electromagnetic wave. Switching is performed by a switching valve 104 (second forward / backward electromagnetic switching valve 106). That is, during the advance drive, the pressurized air is supplied to the advance side port of the first advance / retreat air cylinder 45 (second advance / retreat air cylinder 75), and during the reverse drive, the pressurized air is supplied to the first advance / retreat air cylinder 45 (second advance / retreat air). Supplied to the backward port of the cylinder 75).

但し、排気絞り弁１０４Ａ（排気絞り弁１０６Ａ）のエア通過量の方が、排気絞り弁１０４Ｂ（排気絞り弁１０６Ｂ）のエア通過量よりも大きく設定されている。それ故、ピストンロッド４５ａ（ピストンロッド７５ａ）が進出駆動されて、第１可動刃４０（第２可動刃７０）が糸取り位置へ進出移動する速度もよも、ピストンロッド４５ａ（ピストンロッド７５ａ）が後退駆動されて、第１可動刃４０（第２可動刃７０）が糸切り位置へ復帰する復帰速度の方が遅くなる。   However, the air passage amount of the exhaust throttle valve 104A (exhaust throttle valve 106A) is set larger than the air passage amount of the exhaust throttle valve 104B (exhaust throttle valve 106B). Therefore, the piston rod 45a (piston rod 75a) is driven forward, and the piston rod 45a (piston rod 75a) is driven not only at the speed at which the first movable blade 40 (second movable blade 70) moves forward to the thread take-up position. The return speed at which the first movable blade 40 (second movable blade 70) returns to the thread trimming position when driven backward is slower.

図１３−２（図１３−４）に示すように、第１解放エアシリンダ５３（第２解放エアシリンダ８３）は複動型であり、エア供給源１１５からの加圧エアが第１解放電磁切換え弁５３（第２解放電磁切換え弁８３）で切換えられる。即ち、進出駆動時には加圧エアは第１解放エアシリンダ５３（第２解放エアシリンダ８３）の進出側ポートに供給され、後退駆動時には加圧エアは第１解放エアシリンダ５３（第２解放エアシリンダ８３）の後退側ポートに供給される。   As shown in FIG. 13-2 (FIG. 13-4), the first release air cylinder 53 (second release air cylinder 83) is a double-acting type, and the pressurized air from the air supply source 115 receives the first release electromagnetic wave. Switching is performed by a switching valve 53 (second release electromagnetic switching valve 83). That is, during the advance drive, pressurized air is supplied to the advance port of the first release air cylinder 53 (second release air cylinder 83), and during reverse drive, the pressurized air is supplied to the first release air cylinder 53 (second release air cylinder). 83) to the backward port.

但し、排気絞り弁１０５Ａ（排気絞り弁１０７Ａ）のエア通過量よりも、排気絞り弁１０５Ｂ（排気絞り弁１０７Ｂ）のエア通過量の方が大きく設定されている。それ故、ピストンロッド５３ａ（ピストンロッド８３ａ）が進出駆動されて、第１可動刃４０（第２可動刃７０）が微小距離だけ糸取り位置側へ解放移動する解放速度の方が、ピストンロッド５３ａ（ピストンロッド８３ａ）が後退駆動されて、第１可動刃４０（第２可動刃７０）が糸切り位置へ復帰する復帰速度よりも遅くなる。   However, the air passage amount of the exhaust throttle valve 105B (exhaust throttle valve 107B) is set larger than the air passage amount of the exhaust throttle valve 105A (exhaust throttle valve 107A). Therefore, when the piston rod 53a (piston rod 83a) is driven to advance, the release speed at which the first movable blade 40 (second movable blade 70) is released to the thread take-up position side by a minute distance is higher than the piston rod 53a ( The piston rod 83a) is driven backward, and the first movable blade 40 (second movable blade 70) is slower than the return speed at which it returns to the thread trimming position.

即ち、上糸１４（下糸２１）の解放速度は、所定の低速度となるようにゆっくりになる。特に、上糸１４については、じわっと解放される。所定の低速度は、送り速度に基づいて設定される。上糸解放指令コードに基づいて、第１解放エアシリンダ５３を駆動後、次の針目の縫いが終了するまで、第１可動刃４０が徐々に移動する。上糸１４が解放されるのは、次の針目の縫いが終了した以降となる。   That is, the releasing speed of the upper thread 14 (lower thread 21) becomes slow so as to be a predetermined low speed. In particular, the upper thread 14 is released gradually. The predetermined low speed is set based on the feed speed. Based on the upper thread release command code, the first movable blade 40 gradually moves after the first release air cylinder 53 is driven until the sewing of the next stitch is completed. The upper thread 14 is released after the sewing of the next stitch is completed.

次に、パターン縫いミシン１において、パターン縫いの縫製終了後に、上糸１４が上糸切り機構３５により切断されてから上糸保持機構３１によりその糸端１４ｂが保持されるのと同時に、下糸２１が下糸切り機構６５により切断されてから下糸保持機構６１によりその糸端２１ｂが保持される作用及び効果について、図１２の縫製データと図１４のタイミングチャートに基づいて説明する。   Next, in the pattern sewing machine 1, after the end of pattern sewing, the upper thread 14 is cut by the upper thread trimming mechanism 35 and then the upper end holding mechanism 31 holds the thread end 14b. The operation and effect of holding the thread end 21b by the lower thread holding mechanism 61 after the thread 21 is cut by the lower thread trimming mechanism 65 will be described based on the sewing data in FIG. 12 and the timing chart in FIG.

図１４において、最終縫目である第ｎ針目の針落ち位置データによりパターン縫いが終了したＴ１の時点で、読み込んだ上糸切断指令コードに基づいて上糸切断装置３０により上糸１４（１点鎖線で図示）が切断され、上糸保持機構３１により上糸１４の糸端１４ｂが保持されるとともに、続いてＴ２の時点で、次に読み込んだ下糸切断指令コードに基づいて下糸切断装置６０により下糸２１（２点鎖線で図示）が切断され、下糸保持機構６１により下糸２１の糸端２１ｂが保持される。   In FIG. 14, at the time T1 when the pattern sewing is completed based on the needle drop position data of the nth stitch which is the final stitch, the upper thread 14 (one point) is obtained by the upper thread cutting device 30 based on the read upper thread cutting command code. And the upper end 14b of the upper thread 14 is held by the upper thread holding mechanism 31. Subsequently, at the time T2, the lower thread cutting device is based on the lower thread cutting command code read next. The lower thread 21 (shown by a two-dot chain line) is cut by 60, and the thread end 21b of the lower thread 21 is held by the lower thread holding mechanism 61.

そこで、先ず、上糸１４の切断及び上糸保持について説明する。
図１３−１で説明したように、Ｔ１の時点で、第１進退電磁切換え弁１０４により第１進退エアシリンダ４５のピストンロッド４５ａが進出駆動され、第１可動刃４０が図４に示す糸切り位置から図１５に示す糸取り位置へ一気に進出移動する。このとき、第１可動刃４０のフック部４０ａが縫針９の直下に移動して、加工布Ｗから目孔９ａに延びる上糸１４がフック部４０ａに引っ掛かる。 Therefore, first, cutting of the upper thread 14 and holding of the upper thread will be described.
As described with reference to FIG. 13A, at time T1, the first forward / backward electromagnetic switching valve 104 drives the piston rod 45a of the first forward / backward air cylinder 45 so that the first movable blade 40 is thread-trimmed as shown in FIG. Advancing and moving from the position to the thread take-up position shown in FIG. At this time, the hook portion 40a of the first movable blade 40 moves directly below the sewing needle 9, and the upper thread 14 extending from the work cloth W to the eye hole 9a is hooked on the hook portion 40a.

このとき、第１進退電磁切換え弁１０４により第１進退エアシリンダ４５のピストンロッド４５ａが後退駆動され、第１可動刃４０が時点Ｔ３において図４の糸切り位置へ一気に後退移動する。このとき、フック部４０ａに形成された刃部４０ｂと第１固定刃４１の刃部４１ｂとで上糸１４が切断されるのと同時に、切断されて目孔９ａに連なる上糸１４の糸端１４ｂが第１可動刃４０と第１保持バネ４７とで保持される。   At this time, the piston rod 45a of the first advancing / retreating air cylinder 45 is driven backward by the first advancing / retreating electromagnetic switching valve 104, and the first movable blade 40 moves backward to the thread trimming position of FIG. 4 at a time T3. At this time, when the upper thread 14 is cut by the blade part 40b formed in the hook part 40a and the blade part 41b of the first fixed blade 41, the thread end of the upper thread 14 cut and connected to the eye hole 9a is simultaneously cut. 14 b is held by the first movable blade 40 and the first holding spring 47.

即ち、第１可動刃４０は糸駒から上糸１４を繰り出しながら糸取り位置から約５０mm離れた糸切り位置で上糸１４を切断するので、加工布Ｗに連なる上糸端部１４ａは約５０mmになっている。それ故、作業者は約５０mmも長い上糸端部１４ａを指で掴み易くなり、加熱したコテを用いたほつれ防止作業が格段にし易くなる。   That is, the first movable blade 40 cuts the upper thread 14 at a thread trimming position about 50 mm away from the thread take-up position while feeding the upper thread 14 from the thread spool, so that the upper thread end 14a connected to the work cloth W is about 50 mm. It has become. Therefore, the operator can easily grasp the upper thread end portion 14a that is as long as about 50 mm with a finger, and the fraying prevention operation using a heated iron becomes much easier.

次に、下糸２１の切断及び下糸保持について説明する。
図１３−３で説明したように、Ｔ２の時点で、第２進退電磁切換え弁１０６により第２進退エアシリンダ７５のピストンロッド７５ａが進出駆動され、第２可動刃７０が図８に示す糸切り位置から図１８に示す糸取り位置へ一気に進出移動する。このとき、第２可動刃７０のフック部７０ａが縫針９の直下に移動して、加工布Ｗから垂直回転釜２２に延びる下糸２１がフック部７０ａに引っ掛かる。 Next, cutting of the lower thread 21 and holding of the lower thread will be described.
As described with reference to FIG. 13C, at time T2, the piston rod 75a of the second forward / backward air cylinder 75 is driven to advance by the second forward / backward electromagnetic switching valve 106, and the second movable blade 70 is thread-trimmed as shown in FIG. Advancing and moving from the position to the thread take-up position shown in FIG. At this time, the hook portion 70a of the second movable blade 70 moves directly below the sewing needle 9, and the lower thread 21 extending from the work cloth W to the vertical rotary hook 22 is hooked on the hook portion 70a.

このとき、第２進退電磁切換え弁１０６により第２進退エアシリンダ７５のピストンロッド７５ａが後退駆動され、第２可動刃７０が時点Ｔ４において図８の糸切り位置へ一気に後退移動する。このとき、フック部７０ａに形成された刃部７０ｂと第２固定刃７１の刃部７１ｂとで下糸２１が切断されるのと同時に、切断されて垂直回転釜２２に連なる下糸２１の糸端２１ｂが第２可動刃７０と第２保持バネ７７とで保持される。   At this time, the piston rod 75a of the second advancing / retreating air cylinder 75 is driven backward by the second advancing / retreating electromagnetic switching valve 106, and the second movable blade 70 moves back to the thread trimming position of FIG. 8 at a time T4. At this time, the lower thread 21 is cut by the blade part 70b formed on the hook part 70a and the blade part 71b of the second fixed blade 71, and simultaneously, the lower thread 21 is cut and connected to the vertical rotary hook 22. The end 21 b is held by the second movable blade 70 and the second holding spring 77.

即ち、第２可動刃７０は下糸２１を繰り出しながら糸取り位置から約５０mm離れた糸切り位置で下糸２１を切断するので、加工布Ｗに連なる下糸端部２１ａの長さは約５０mmになっている。それ故、作業者は約５０mmも長い下糸端部２１ａを指で掴み易くなり、加熱したコテを用いたほつれ防止作業が格段にし易くなる。   That is, the second movable blade 70 cuts the lower thread 21 at a thread trimming position about 50 mm away from the thread take-up position while feeding the lower thread 21, so that the length of the lower thread end portion 21a connected to the work cloth W is about 50 mm. It has become. Therefore, the operator can easily grasp the lower thread end portion 21a as long as about 50 mm with his / her finger, and the fraying prevention operation using a heated iron becomes much easier.

次に、パターン縫いミシン１において、パターン縫いの縫製開始時に、保持状態の上糸１４が上糸解放機構３２により解放されるのと同時に、保持状態の下糸２１が下糸解放機構６２により解放される作用及び効果について、図１２の縫製データと図１４のタイミングチャートに基づいて説明する。   Next, in the pattern sewing machine 1, when the sewing of pattern sewing starts, the held upper thread 14 is released by the upper thread releasing mechanism 32, and at the same time the held lower thread 21 is released by the lower thread releasing mechanism 62. Actions and effects to be performed will be described based on the sewing data in FIG. 12 and the timing chart in FIG.

図１２に示す縫製データに基づいて縫製が開始された直後、第１，第２針目の針落ちデータの次に下糸解放指令コードが読み込まれ、図１４において、先ず、Ｔ１１の時点で、下糸解放機構６２により下糸２１の糸端２１ｂが解放される。続いて、上糸解放指令コードが読み込まれ、Ｔ１２の時点で、上糸解放機構３２により上糸１４の糸端１４ｂが解放される。   Immediately after the start of sewing based on the sewing data shown in FIG. 12, the lower thread release command code is read next to the needle drop data of the first and second stitches. In FIG. The yarn release mechanism 62 releases the yarn end 21 b of the lower yarn 21. Subsequently, the upper thread release command code is read, and the thread end 14b of the upper thread 14 is released by the upper thread release mechanism 32 at time T12.

そこで、先ず、下糸保持の解放動作について説明する。
図１３−４で説明したように、Ｔ１１の時点で、第２解放電磁切換え弁１０７により第２解放エアシリンダ８３のピストンロッド８３ａが、第２進退エアシリンダ７５の後退駆動力に打ち勝って解放駆動され、第２可動刃７０が図８に示す糸切り位置から図１９に示す糸解放位置へ一気に解放移動する。このとき、第２可動刃７０と第２保持バネ７７とで保持されていた下糸２１の糸端２１ｂが解放される。 First, the lower thread holding release operation will be described.
As described with reference to FIG. 13-4, at time T11, the second release electromagnetic switching valve 107 causes the piston rod 83a of the second release air cylinder 83 to overcome the backward drive force of the second forward / backward air cylinder 75 and release drive. Then, the second movable blade 70 is released and moved from the thread trimming position shown in FIG. 8 to the thread releasing position shown in FIG. At this time, the yarn end 21b of the lower yarn 21 held by the second movable blade 70 and the second holding spring 77 is released.

次に、上糸保持の解放動作について説明する。
その後、図１３−２で説明したように、Ｔ１２の時点で、第１解放電磁切換え弁１０５により第１解放エアシリンダ５３のピストンロッド５３ａが、第１進退エアシリンダ４５の後退駆動力に打ち勝って解放駆動され、第１可動刃４０が図４に示す糸切り位置から図１６に示す糸解放位置へ一気に解放移動する。このとき、第１可動刃４０と第１保持バネ４７とで保持されていた上糸１４の糸端１４ｂが解放される。 Next, the upper thread holding release operation will be described.
Thereafter, as explained in FIG. 13B, at time T12, the first release electromagnetic switching valve 105 causes the piston rod 53a of the first release air cylinder 53 to overcome the backward drive force of the first advance / retreat air cylinder 45. When the release is driven, the first movable blade 40 is released from the thread trimming position shown in FIG. 4 to the thread releasing position shown in FIG. At this time, the yarn end 14b of the upper yarn 14 held by the first movable blade 40 and the first holding spring 47 is released.

このパターン縫いミシン１には、上糸方向調節機構３３を装備しているので、第１本体フレーム３７の方向であって、上糸１４の引っ張り方向は、図７に示す時計回り限界方向から、図１７に示すＸ方向に平行な反時計回り限界方向の範囲内で調節可能になっている。そこで、パターン縫いを行なうに際して、糸端保持状態の上糸１４の引っ張り方向がパターン縫い開始時の縫製方向と異なるように、上糸方向調節機構３３を介して上糸１４の引っ張り方向を変更することができるので、パターン縫いの開始時に上糸解放機構３２により解放された上糸１４の糸端部１４ｂが縫い込まれることがない。   Since this pattern stitching sewing machine 1 is equipped with the upper thread direction adjusting mechanism 33, the pulling direction of the upper thread 14 in the direction of the first main body frame 37 is from the clockwise limit direction shown in FIG. Adjustment is possible within the range of the counterclockwise limit direction parallel to the X direction shown in FIG. Therefore, when performing pattern sewing, the pulling direction of the upper thread 14 is changed via the upper thread direction adjusting mechanism 33 so that the pulling direction of the upper thread 14 in the thread end holding state is different from the sewing direction at the start of pattern sewing. Therefore, the thread end portion 14b of the upper thread 14 released by the upper thread release mechanism 32 at the start of pattern sewing is not sewn.

同様に、このパターン縫いミシン１には、下糸方向調節機構６３を装備しているので、第２本体フレーム６７の方向であって、下糸２１の引っ張り方向は、図９に示すＸ方向に対する約４５°の反時計回り限界方向から、図２０に示すＸ方向に対する約２０°の反時計回り限界方向の範囲内で調節可能になっている。そこで、図９に示すように、下糸２１の引っ張り方向を針落ち点５ａからボビンケース２３の糸案内孔２３ｂへ向かう方向と同一方向に設定することができるので、パターン縫いの開始時に下糸解放機構６２により解放された下糸２１の糸端部２１ｂが縫い込まれることがない。   Similarly, since this pattern stitching sewing machine 1 is equipped with the lower thread direction adjusting mechanism 63, the direction of the second main body frame 67 and the pulling direction of the lower thread 21 with respect to the X direction shown in FIG. Adjustment is possible within a range from the counterclockwise limit direction of about 45 ° to the counterclockwise limit direction of about 20 ° with respect to the X direction shown in FIG. Therefore, as shown in FIG. 9, the pulling direction of the lower thread 21 can be set in the same direction as the direction from the needle drop point 5a to the thread guide hole 23b of the bobbin case 23. The thread end 21b of the lower thread 21 released by the release mechanism 62 is not sewn.

また、上糸切断機構３０と上糸保持機構３１は、パターン縫いミシン１のアーム部４の左側に配置されたので、作業者が上糸１４を糸駒から縫針９に糸掛けする糸掛け作業は、パターン縫いミシン１の右側であるため、これら上糸切断機構３０と上糸保持機構３１により、糸掛け作業を邪魔さることがなく、作業性がよい。   Further, since the upper thread cutting mechanism 30 and the upper thread holding mechanism 31 are arranged on the left side of the arm portion 4 of the pattern sewing machine 1, the thread threading operation in which the operator threads the upper thread 14 from the thread spool onto the sewing needle 9 is performed. Is the right side of the pattern stitching sewing machine 1, and therefore, the upper thread cutting mechanism 30 and the upper thread holding mechanism 31 do not interfere with the threading operation and the workability is good.

また、上糸方向調節機構３３は、第１本体フレーム３７が、加工布Ｗを押える布押え装置１５と干渉しない範囲で上糸１４の引っ張り方向を調節するように構成されたので、上糸進退移動機構３３と上糸保持機構３１の引っ張り方向を、布押え装置１５との干渉を回避しながら調節することができる。   Further, the upper thread direction adjusting mechanism 33 is configured to adjust the pulling direction of the upper thread 14 within a range in which the first main body frame 37 does not interfere with the presser device 15 that presses the work cloth W. The pulling direction of the moving mechanism 33 and the upper thread holding mechanism 31 can be adjusted while avoiding interference with the presser foot device 15.

また、下糸方向調節機構６３は、下糸切り機構６５の第２可動刃７０を案内する第２本体フレーム６７と、この第２本体フレーム６７から延びた水平な第２張出し板８５と、この第２張出し板８５に形成された少なくとも１つの円弧スリット８５ａと、ベッド部２に固定され円弧スリット８５ａを介して第２張出し板８５に連結される固定ボルト８６を有するので、第２張出し板８５の円弧スリット８５ａを介して、第２本体フレーム６７の方向を容易に且つ迅速に調節することができる。   The lower thread direction adjusting mechanism 63 includes a second main body frame 67 for guiding the second movable blade 70 of the lower thread trimming mechanism 65, a horizontal second projecting plate 85 extending from the second main body frame 67, and Since the second overhanging plate 85 includes at least one arcuate slit 85a formed in the second overhanging plate 85 and a fixing bolt 86 fixed to the bed portion 2 and connected to the second overhanging plate 85 via the arcuate slit 85a, the second overhanging plate 85 is provided. The direction of the second main body frame 67 can be easily and quickly adjusted via the arc slit 85a.

次に、前記実施例を部分的に変更した変更形態について説明する。
１）本実施例では、パターン縫いミシンについて説明したが、上糸切断装置及び下糸切断装置を備えた本縫いミシン等、種々のミシンに本発明を適用し得ることは勿論である。 Next, a modified embodiment in which the above embodiment is partially modified will be described.
1) Although the pattern sewing machine has been described in the present embodiment, the present invention can of course be applied to various sewing machines such as a main sewing machine having an upper thread cutting device and a lower thread cutting device.

本発明の実施例に係るパターン縫いミシンの斜視図である。It is a perspective view of the pattern sewing machine which concerns on the Example of this invention. パターン縫いミシンの要部拡大部分斜視図である。It is a principal part expansion partial perspective view of a pattern sewing machine. パターン縫いミシンの部分正面図である。It is a partial front view of a pattern sewing machine. パターン縫いミシンの要部拡大正面図である。It is a principal part enlarged front view of a pattern sewing machine. 上糸切断装置と上糸保持機構と上糸解放機構の平面図である。It is a top view of an upper thread cutting device, an upper thread holding mechanism, and an upper thread release mechanism. 第１本体フレームの部分底面図である。It is a partial bottom view of the 1st main part frame. パターン縫いミシンのベッド部の要部部分平面図である。It is a principal part top view of the bed part of a pattern sewing machine. パターン縫いミシンのベッド部内部の正面図である。It is a front view inside the bed part of a pattern sewing machine. パターン縫いミシンのベッド部内部の底面図である。It is a bottom view inside the bed part of a pattern sewing machine. 第２本体フレームの部分底面図である。It is a partial bottom view of the 2nd main part frame. パターン縫いミシンの制御系のブロック図である。It is a block diagram of a control system of a pattern sewing machine. 縫製データのデータ構成を説明する図表である。It is a chart explaining the data structure of sewing data. 第１進退エアシリンダに対するエア供給系の回路図である。It is a circuit diagram of the air supply system with respect to the 1st advance / retreat air cylinder. 第１解放エアシリンダに対するエア供給系の回路図である。It is a circuit diagram of the air supply system with respect to a 1st release air cylinder. 第２進退エアシリンダに対するエア供給系の回路図である。It is a circuit diagram of the air supply system with respect to a 2nd advance / retreat air cylinder. 第２解放エアシリンダに対するエア供給系の回路図である。It is a circuit diagram of the air supply system with respect to the 2nd release air cylinder. 上糸と下糸の切断及び解放のタイムチャートである。It is a time chart of cutting and releasing of upper thread and lower thread. 上糸切断装置による糸取り状態における図４相当図である。FIG. 5 is a view corresponding to FIG. 上糸解放状態における図４相当図である。FIG. 5 is a view corresponding to FIG. 4 in the upper thread released state. 上糸の引っ張り方向が異なる図５相当図である。FIG. 6 is a view corresponding to FIG. 5 in which the upper thread is pulled differently. 上糸切断装置による糸取り状態における図８相当図である。FIG. 9 is a view corresponding to FIG. 8 in a state where a thread is taken by an upper thread cutting device. 下糸解放状態における図８相当図である。FIG. 9 is a view corresponding to FIG. 8 in a lower thread releasing state. 下糸の引っ張り方向が異なる図９相当図である。FIG. 10 is a view corresponding to FIG. 9 in which the lower thread pulling direction is different.

符号の説明Explanation of symbols

１ パターン縫いミシン
４ アーム部
５ 針板
８ 針棒
９ 縫針
９ａ 目孔
１４ 上糸
１５ 布押え装置
１８ 押え腕
２１ 下糸
２２ 垂直回転釜
２３ ボビンケース
２３ｂ 糸案内孔
３０ 上糸切断機構（上糸切断手段）
３１ 上糸保持機構
３３ 上糸方向調節機構(上糸用方向調節機構)
３５ 上糸切り機構(上糸用糸切り機構)
３６ 上側進退移動機構(上糸用進退移動手段)
３７ 第１本体フレーム（上糸用案内部材）
４０ 第１可動刃(上糸用可動刃)
４５ 第１進退エアシリンダ
５３ 第１解放エアシリンダ
５５ 第１張出し板(上糸用張出し板)
５５ａ 円弧スリット(上糸用円弧スリット)
５６ 支持部材(上糸用支持部材)
６０ 下糸切断機構（下糸切断手段）
６１ 下糸保持機構
６３ 下糸方向調節機構(下糸用方向調節機構)
６５ 下糸切り機構(下糸用糸切り機構)
６６ 下側進退移動機構(下糸用進退移動手段)
６７ 第２本体フレーム（下糸用案内部材）
７０ 第２可動刃(下糸用可動刃)
７５ 第２進退エアシリンダ
８３ 第２解放エアシリンダ
８５ 第２張出し板(下糸用張出し板)
８５ａ 円弧スリット(下糸用円弧スリット)
８６ 固定ボルト(下糸用締結部材)
９０ 制御装置
９２ ＲＯＭ 1 Pattern sewing machine 4 Arm part 5 Needle plate 8 Needle bar 9 Sewing needle 9a Needle hole 14 Upper thread 15 Work clamp device 18 Presser arm 21 Lower thread 22 Vertical rotary hook 23 Bobbin case 23b Thread guide hole 30 Upper thread cutting mechanism (upper thread Cutting means)
31 Upper thread holding mechanism 33 Upper thread direction adjusting mechanism (Upper thread direction adjusting mechanism)
35 Upper thread trimming mechanism (Upper thread thread trimming mechanism)
36 Upper side advance / retreat mechanism (upper / reverse movement means for upper thread)
37 First body frame (guide member for upper thread)
40 1st movable blade (movable blade for upper thread)
45 First Advance / Retreat Air Cylinder 53 First Release Air Cylinder 55 First Overhang Plate (Upper Thread Plate)
55a Circular slit (circular slit for upper thread)
56 Support member (support member for upper thread)
60 Lower thread cutting mechanism (lower thread cutting means)
61 Lower thread holding mechanism 63 Lower thread direction adjusting mechanism (lower thread direction adjusting mechanism)
65 Lower thread trimming mechanism (lower thread trimming mechanism)
66 Lower side advance / retreat mechanism (lower thread advance / retreat means)
67 Second body frame (guide member for lower thread)
70 Second movable blade (movable blade for lower thread)
75 Second forward / backward air cylinder 83 Second release air cylinder 85 Second overhanging plate (overhanging plate for lower thread)
85a Arc slit (arc slit for bobbin thread)
86 Fixing bolt (fastener for lower thread)
90 Controller 92 ROM

Claims (8)

縫針を取付けた針棒と、回転釜と、針板の上方で加工布から縫針の目孔に延びる上糸を切断する上糸切断手段とを備えたミシンにおいて、
前記上糸切断手段は、上糸用可動刃を含む上糸用糸切り機構と、この上糸用可動刃を縫針の直下で上糸を引っ掛ける糸取り位置とこの糸取り位置から所定距離離隔した糸切り位置とに亙って進退移動させる上糸用進退移動手段とを有し、
前記上糸切断手段により糸切り位置で切断されて縫針の目孔へ延びる上糸の糸端を保持する上糸保持機構を設け、
前記上糸用進退移動手段と前記上糸保持機構は、縫針の目孔から前記上糸保持機構へ延びる上糸の引っ張り方向を調節する為の上糸用方向調節機構を有することを特徴とするミシン。 In a sewing machine comprising a needle bar to which a sewing needle is attached, a rotary hook, and an upper thread cutting means for cutting an upper thread extending from the work cloth to the eye of the sewing needle above the needle plate,
The upper thread cutting means includes an upper thread thread trimming mechanism including an upper thread movable blade, a thread trimming position at which the upper thread movable blade is hooked immediately below the sewing needle, and a thread trimming mechanism separated by a predetermined distance from the thread trimming position. The upper thread advance / retreat means for moving forward and backward over the position,
An upper thread holding mechanism that holds the thread end of the upper thread that is cut at the thread trimming position by the upper thread cutting means and extends to the stitch hole of the sewing needle;
The upper thread advancing / retreating means and the upper thread holding mechanism include an upper thread direction adjusting mechanism for adjusting a pulling direction of the upper thread extending from a stitch hole to the upper thread holding mechanism. sewing machine. 前記上糸用方向調節機構は、縫針側ほど下がる傾斜状に配設され且つ前記上糸用糸切り機構の上糸用可動刃を案内する上糸用案内部材と、この上糸用案内部材から延びた水平な上糸用張出し板と、この上糸用張出し板に形成された少なくとも１つの上糸用円弧スリットと、ミシン機枠に固定され且つ上糸用円弧スリットを介して上糸用張出し板に連結される上糸用支持部材とを有することを特徴とする請求項１に記載のミシン。   The upper thread direction adjusting mechanism is arranged in an inclined shape that is lowered toward the sewing needle side and guides the upper thread movable blade for the upper thread thread trimming mechanism, and the upper thread guide member. An extended horizontal upper thread overhanging plate, at least one upper thread arc slit formed in the upper thread overhanging plate, and an upper thread overhang fixed to the sewing machine frame and through the upper thread arc slit The sewing machine according to claim 1, further comprising an upper thread support member connected to the plate. 針板の下方で加工布から前記回転釜に延びる下糸を切断する下糸切断手段を設け、
前記下糸切断手段は、下糸用可動刃を含む下糸用糸切り機構と、この下糸用可動刃を針板の下側で下糸を引っ掛ける糸取り位置とこの糸取り位置から設定距離離隔した糸切り位置とに亙って進退移動させる下糸用進退移動手段とを有し、
前記下糸切断手段により糸切り位置において切断されて回転釜のボビンケースの糸案内孔へ延びる下糸の糸端を保持する下糸保持機構を設けたことを特徴とする請求項１又は２に記載のミシン。 A lower thread cutting means for cutting a lower thread extending from the work cloth to the rotary hook below the needle plate,
The lower thread cutting means includes a lower thread thread cutting mechanism including a lower thread movable blade, a thread take-up position at which the lower thread movable blade is hooked on the lower side of the needle plate, and a set distance from the thread take-up position. A lower thread advancing / retreating means for advancing / retreating over the thread trimming position,
3. A lower thread holding mechanism for holding a thread end of a lower thread that is cut at a thread cutting position by the lower thread cutting means and extends to a thread guide hole of a bobbin case of a rotary hook. The described sewing machine. 前記下糸用進退移動手段と前記下糸保持機構は、前記回転釜のボビンケースの糸案内孔から前記下糸保持機構へ延びる下糸の引っ張り方向を調節する為の下糸用方向調節機構を有することを特徴とする請求項３に記載のミシン。   The lower thread advancing / retreating means and the lower thread holding mechanism include a lower thread direction adjusting mechanism for adjusting a pulling direction of the lower thread extending from the thread guide hole of the bobbin case of the rotary hook to the lower thread holding mechanism. The sewing machine according to claim 3, wherein the sewing machine has a sewing machine. 前記下糸用進退移動手段は、平面視において、前記下糸の引っ張り方向を針落ち点から前記ボビンケースの糸案内孔へ向かう方向と同一方向に設定可能に構成されたことを特徴とする請求項４に記載のミシン。   The lower thread advancing / retreating means is configured to be able to set the pulling direction of the lower thread in the same direction as a direction from a needle drop point to a thread guide hole of the bobbin case in a plan view. Item 5. The sewing machine according to Item 4. 前記上糸切断手段と前記上糸保持機構は、ミシンのアーム部の左側に配置されたことを特徴とする請求項１〜５の何れかに記載のミシン。   The sewing machine according to any one of claims 1 to 5, wherein the upper thread cutting means and the upper thread holding mechanism are arranged on the left side of an arm part of the sewing machine. 前記上糸用方向調節機構は、前記上糸用案内部材が、加工布を押える布押え装置と干渉しない範囲で上糸の引っ張り方向を調節するように構成されたことを特徴とする請求項２に記載のミシン。   3. The upper thread direction adjusting mechanism is configured to adjust the upper thread pulling direction within a range in which the upper thread guide member does not interfere with a presser device that presses a work cloth. The sewing machine according to 1. 前記下糸用方向調節機構は、前記下糸用糸切り機構の下糸用可動刃を案内する下糸用案内部材と、この下糸用案内部材から延びた水平な下糸用張出し板と、この下糸用張出し板に形成された少なくとも１つの下糸用円弧スリットと、ミシン機枠に固定され下糸用円弧スリッを介して下糸用張出し板に連結される下糸用締結部材を有することを特徴とする請求項５に記載のミシン。   The lower thread direction adjusting mechanism includes: a lower thread guide member that guides a lower thread movable blade of the lower thread thread trimming mechanism; and a horizontal lower thread extending plate that extends from the lower thread guide member; At least one lower thread arc slit formed on the lower thread overhanging plate, and a lower thread fastening member fixed to the sewing machine frame and connected to the lower thread overhanging plate via the lower thread arc slit The sewing machine according to claim 5, wherein:
JP2007055151A 2007-03-06 2007-03-06 Sewing machine Pending JP2008212442A (en)

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CN2008100740547A CN101260600B (en) 2007-03-06 2008-02-18 Sewing machine
KR1020080020272A KR100983697B1 (en) 2007-03-06 2008-03-05 Sewing machine
DE602008000625T DE602008000625D1 (en) 2007-03-06 2008-03-06 Sewing machine with upper thread cutting and holding mechanism
EP08004152A EP1967629B1 (en) 2007-03-06 2008-03-06 Sewing machine with upper thread cutting and holding mechanisms
AT08004152T ATE457378T1 (en) 2007-03-06 2008-03-06 SEWING MACHINE WITH TOP THREAD CUTTING AND HOLDING MECHANISM

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101096723B1 (en) 2010-01-14 2011-12-22 이상재 Two needle thread cutting device and sewing machine using the same

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200472828Y1 (en) * 2013-03-15 2014-06-10 오덕남 Thread cutting device and sewing machine having the same
CN103668816B (en) * 2013-12-06 2015-09-23 湖州冠炯机电科技有限公司 A kind of rope embroidery machine head
JP2016123621A (en) * 2014-12-26 2016-07-11 ブラザー工業株式会社 Sewing machine and control method for sewing machine
JP5944064B1 (en) * 2015-04-16 2016-07-05 三菱電機株式会社 Upper thread clamp device and sewing machine
CN104805605B (en) * 2015-05-12 2018-07-10 浙江杜马缝纫机股份有限公司 The thread cutting mechanism of flat seam machine
CN106350949A (en) * 2016-11-29 2017-01-25 浙江中捷缝纫科技有限公司 Upper-thread cutting mechanism of sewing machine
CN106436073B (en) * 2016-11-29 2023-02-03 浙江中捷缝纫科技有限公司 Thread cutting structure of bottom thread of sewing machine
DE102017207627A1 (en) * 2017-05-05 2018-11-08 Dürkopp Adler AG Assembly for creating a seam beginning upper thread with a desired seam projection

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07102270B2 (en) 1990-05-22 1995-11-08 ジューキ株式会社 Needle thread cutting device for sewing machine
JP3339755B2 (en) * 1994-12-22 2002-10-28 ブラザー工業株式会社 Sewing machine thread end processing device
JPH09299676A (en) * 1996-05-14 1997-11-25 Juki Corp Exchange thread drawing device for sewing machine
JP4081701B2 (en) 1999-07-13 2008-04-30 ブラザー工業株式会社 Upper thread switching method of sewing machine and upper thread switching device thereof
JP4510991B2 (en) 2000-04-25 2010-07-28 Ｊｕｋｉ株式会社 Thread trimmer
JP2002095882A (en) * 2000-09-26 2002-04-02 Brother Ind Ltd Needle thread cassette and needle thread-exchanging device
KR100843364B1 (en) 2001-02-23 2008-07-02 쥬키 가부시키가이샤 A sewing machine for overlocking botton holes
JP3981972B2 (en) 2002-03-28 2007-09-26 ブラザー工業株式会社 sewing machine
JP3821098B2 (en) * 2003-01-22 2006-09-13 ブラザー工業株式会社 sewing machine
JP4419644B2 (en) * 2004-03-30 2010-02-24 ブラザー工業株式会社 Upper thread clamping mechanism of sewing machine
CN1763288A (en) * 2004-10-18 2006-04-26 重机公司 Thread cutting device for sewing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101096723B1 (en) 2010-01-14 2011-12-22 이상재 Two needle thread cutting device and sewing machine using the same

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