JP2004174120A - Feeding device of sewing machine - Google Patents

Feeding device of sewing machine Download PDF

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Publication number
JP2004174120A
JP2004174120A JP2002346609A JP2002346609A JP2004174120A JP 2004174120 A JP2004174120 A JP 2004174120A JP 2002346609 A JP2002346609 A JP 2002346609A JP 2002346609 A JP2002346609 A JP 2002346609A JP 2004174120 A JP2004174120 A JP 2004174120A
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Japan
Prior art keywords
feed
feed dog
dog
sewing machine
fixed
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JP2002346609A
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Japanese (ja)
Inventor
Tadashi Yokoyama
正 横山
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Juki Corp
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Juki Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a selective use of a feed dog having different heights from a feeding part to a fixed part of the feed dog by the presence of thread cutting device requires the set up feeding tables on the feed dog respectively, to compensate the differences of heights leading to increase of production cost and causes troublesome works for the exchange of feeding gears. <P>SOLUTION: The feeding device of a sewing machine is constructed to furnish lower the feed dog from the the feed dog fixing site to the gears than the first the feed dog on the feeding table commonly used for machines with different specifications in the relative positioning of feeding table at predetermined heights for gears of first the feed dog to the needle table. The feeding device is fixed at the lower edge of the attached site of the the feed dog on the feeding table and fixes the the feed dog fixing part on the upper part of the feed dog fixed part. The gear of second the feed dog is placed at the gear feeding device having a predetermined relative height to the gear of the second the feed dog and the needle plate so as to place between the second the feed dog and the feeding table. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は複数種類の規格の送り歯を選択的に設けて使用するミシンの送り装置に関わるものである。
【０００２】
【従来の技術】
まず、第３図は一対の水平釜を備える一般的な二本針本縫いミシンの構成を説明する説明図である。ここで、１６は一対のミシン針でありミシン機枠に支持された不図示の針棒により送り方向に向かって略直交して対をなして保持され、ミシンの駆動と共に該ミシン針１６下方に配設され１７に示す一対の釜と協働して縫製物に縫目を形成する。なお、２０はミシンベッドであり説明の便宜上、図２中では針板と共に一部の構成は省略して描写している。また、前記一対のミシン針１６を中心にして送り方向に向かって左右に略対称に各構成が配置されており、同一の作用をする構成については左右の別なく同一の符号を付す。
【０００３】
ここで、釜１７は外釜１７ｂ，突起部１７ａを有した中釜１７Ａ（不図示）およびボビン１７ｃとからなる。また、左右両釜１７，１７の間には後述する送り台１２１および送り歯１００からなる送り装置が配設されている。この送り歯１００は多くの二本針本縫いミシンの糸切り装置を備えない通常の仕様において共通して用いられる所定の規格を有した市販ゲージ（標準品）であり、上端に形成され布と接離して布を送る歯部１００ｄおよび該歯部を支持する固定部１００ｃとからなる。該送り歯固定部１００ｃの下面を送り台１２１の送り歯取付部１２１ｃに取付ネジ１００ａにより固定している。このとき、前記送り歯１００の歯部１００ｄを針板２１と所定の高さ関係に配置し送り台１２１の送り運動時には歯部１００ｄが針板２１の上面に出没するようにした際に、送り歯固定部１００ｃは針板２１に近接した高さに形成されている。そして、これらの協働により、ミシンベッド２０上の布を送ると共に図示しない上糸Ｔ１および下糸Ｔ２を交絡させて縫製を行なう。尚、前記送り台１２１は後述する駆動手段に固定される基部１２１ａと、市販ゲージとしての送り歯１００の送り歯固定部１００ｃ下端を着脱可能に装着される送り歯取付部１２１ｃとからなる。このとき、該送り歯取付部１２１ｃに該送り歯１００を装着し、さらに前記送り歯１００の歯部１００ｄを針板２１と前述の所定の高さ関係に配置した際には、該送り歯固定部１００ｃおよび送り歯取付部１２１ｃとが針板２１に近接する高さに配置するように形成されている。
【０００４】
次いで、図４、５は同ミシンの送り装置を説明する説明図であり、説明の便宜上、それぞれに構成の一部を省略している。ここで、図４は図３のＹ−Ｙ線の矢符により指示される側の平面視説明図であり、図５は同Ｙ−Ｙ線における断面を矢符方向に見た説明図である。該図４、５において、１５は不図示のミシン機枠に固定された釜台、２１は上面をミシンベッド２０と略一致させた針板である。さらに、２１ａは前記針板下面に対をなして突設され、その中間に中釜突起部１７ａを遊挿して中釜の回転を防止する中釜回り止めである。ここで、送り台１２１の基台１２１ａは、駆動手段としての水平送り装置１３による水平方向の揺動運動、および上下送り装置１４による上下方向の揺動運動、との合成によりだ円軌跡をした送り運動を行なう。前記送り台基台１２１ａの送り運動により送り台１２１に固定された市販ゲージである送り歯１００は、針板２１上面への送り歯１００の歯部１００ｄの出没と、送り方向への往復運動と、を繰り返し縫製物の送りを行なう。尚、該水平送り装置１３による水平方向の揺動運動は、ミシン機枠に回転可能に支持される水平送り軸１３ｓの回動揺動運動により水平送り腕１３ａおよび水平送りピン１３ｂを介して伝達される水平送り装置１３の図中両矢印Ｂ方向の揺動運動であり、また、上下送り装置１４による上下方向の揺動運動は、ミシン機枠に回転可能に支持される上下送り軸（釜駆動軸を兼ねる）１４ｓの回転を上下送り偏心カム１４ａ，上下送りリンク１４ｂおよび上下送り連結ピン１４ｃを介して伝達され上下送り装置１４の図中両矢印Ｃ方向の揺動運動である。
【０００５】
この送り装置において、縫製の条件やミシン自体の仕様の変更等に応じて異なる規格の送り歯を取り付ける必要が生じることがある。例えば、糸切り機構１８（詳細は後述）の搭載の有無による場合などである。その場合、糸切り機構１８にも多様なものが考えられるが多くの種類の糸切り装置は図６（ａ）に示すように釜１７と送り歯１０１の中間で且つ送り歯１０１の歯部１０１ｄに近接した位置を動メス１８ａが通過し所定の糸Ｔ１，Ｔ２を捕捉、切断を実行する。ここでは、動メス１８ａの運動軌跡を避けるように送り歯１０１の歯部１０１ｄの歯厚ｄは図６（ｂ）に示すような市販ゲージの送り歯１００の歯部１００ｄの歯厚Ｄよりも薄く形成されている。ここで、市販ゲージでは歯厚は２．６ｍｍとされており、例えば、Ｄ：ｄ＝２．６：２．４（ｍｍ）のようになる。このように市販ゲージとは別の規格で製造された送り歯は各ミシンの糸切り装置の構成や動メスの動作軌跡等によっても多種多様になっており、ミシン製造者ごとに異なった規格により製造されていると言ってよい。
【０００６】
尚、図６（ａ）（ｂ）に示すように糸切り装置１８の有無などの理由により送り歯の歯部１０１ｄ、１００ｄの歯厚ｄ、Ｄが異なっている場合があるが、縫いの仕上がりについては歯厚が厚い方の送り歯１００（ｄ＜Ｄ）による縫製の方が縫目の質が高くなるのである。それは、図６に示すように釜が上糸Ｔ１を捕捉し下糸Ｔ２とを結節する過程において送り歯歯部１０１ｄ、１００ｄに形成される針穴１０１ｂ、１００ｂの下端縁から導出する上糸Ｔ１が中釜回り止め２１ａと当接する箇所において、送り歯の歯部の歯厚が薄い場合の方ｄ（図６（ａ））では針穴１０１ｂ下端の糸が導出する縁から中釜回り止め２１ａの先端までの高さの差が大きく、急な（小さい）角度で上糸Ｔ１が屈曲して該当接点に生じる抵抗により安定した好適な糸張力を得られず美しい縫目の形成を阻害する。一方、送り歯歯部の歯厚が厚い方Ｄ（図６（ｂ））では針穴１００ｂ下端の糸が導出する縁から中釜回り止め２１ａの先端までの高さの差が小さく、比較的大きな角度で上糸Ｔ１が中釜回り止め２１ａに当接しており、縫目の形成を阻害する抵抗が生じ難い構成となっている。このことから、糸切り装置を備えた場合には歯厚の薄い送り歯１０１を取り付け、糸切り装置を搭載しない場合には歯厚の厚い送り歯を取り付けることが望ましい。さらには、図６（ｂ）に示したように歯厚の厚い送り歯として市販ゲージの送り歯１００を用いる方が、既製の規格の送り歯であり流通量も多いためコストを低く抑えることができてより好ましい。
【０００７】
さて、上述のように糸切り装置の有無により選択的に異なる規格の送り歯１００、１０１を送り台１２１の送り歯取付部１２１ｃに設けて使用する場合、送り歯１００、１０１の歯部１００ｄ、１０１ｄから送り歯固定部１００ｃ、１０１ｃまでの上下方向の間隔（高さ）の違いにより、針板に対する歯部１００ｄ、１０１ｄの位置が異なってくることがある。しかしながら、縫製においては送り歯の歯部１００ｄ、１０１ｄの針板２１上面への出没量（高さ）は縫製の出来を大きく左右する要素となっており、縫製条件に合致した所定の高さである必要がある。そこで、略だ円状の軌跡で運動する送り歯の揺動位置自体を上下方向に調整する手段が必要とされる。従来は、例えば図５に示すように上下送り装置１４の上下送りリンク１４ｂと送り台基台１２１ａを連結する上下送り連結ピン１４ｃを偏心ピンとし、該上下送り連結ピン１４ｃを上下送りリンク１４ｂに連結ピン固定ネジ１４ｄにより固定する際の上下送り連結ピン１４ｃの上下への偏心方向を調整することにより送り歯１００の揺動位置を上下方向に移動し調整していた。（例えば、特許文献１参照。）
しかしながら、糸切り装置の機能および性能の向上に伴い、その構成が増えたりあるいは大きくなるようになってきた。図７、８は二本針本縫いミシンに糸切り装置１８を設けた場合の説明図である。この糸切り装置１８は、不図示の駆動手段により動メス駆動軸１８ｇおよび該動メス駆動軸１８ｇに固定された動メス駆動腕１８ｆを図７中両矢印Ｒ方向に回動し、該動メス駆動腕１８ｆの切り欠き部に摺動可能に挿通された動メス駆動ピン１８ｅに作用する。該動メス駆動ピン１８ｅは動メス１８ａを固定した動メス固定台１８ｃに固定されており、前記動メス駆動腕１８ｆの作用を該動メス固定台１８ｃに伝達する。該動メス駆動ピン１８ｅを介して伝えられた前記動メス駆動軸１８ｇおよび動メス駆動腕１８ｆからの駆動力により動メス固定台ガイド１８ｈに沿って前記動メス固定台１８ｃと共に前記動メス１８ａを図７、８中両矢印Ａ方向に進退させる。ここで図７、８中右方に前進した動メス１８ａは釜１７と送り歯１０２の歯部１０２ｄに形成される針穴１０２ｂとの間において切断する糸を捕捉した後、図７、８中左方へ後退し固定メス１８ｂとの協働により捕捉した糸を切断する。さらに、切断後の下糸Ｔ２の糸端を保持するための下糸保持体１８ｄが動メス１８ａ下方に設けられている。
【０００８】
このような糸切り装置１８を設けると、図８に示されるように糸切り装置１８の構成、ここでは固定メス１８ｂ、動メス１８ａ、下糸保持体１８ｄが、図５で示した市販ゲージの送り歯１００を取り付ける際に送り歯取付部１２１ｃおよび送り歯固定部１００ｃが位置する空間にせり出した構成となっている。そこで、図８における送り台１２０はそれらの糸切り装置１８の各構成を避けるように送り歯取付部１２０ｃを針板２１から離隔した低い位置に形成されるような構成とすると共に、糸切り装置具備時の歯厚の薄い送り歯であって送り歯歯部から送り歯固定部までの上下方向の間隔（高さ）が比較的大きい送り歯１０２を固定する。このように送り台１２０の送り歯取付部１２０ｃと送り歯１０２の送り歯固定部１０２ｃとを固着する位置を針板２１から下方に離隔した低い位置としたことにより、送り装置が送り運動を行なっても送り装置の各構成と糸切り装置１８の各構成がお互いに干渉しないようにしていた。
【０００９】
このような場合には文献公知発明としては該当するものはないが、送り台を糸切り装置を備えた仕様用１２０、糸切り装置を備えない仕様用１２１とで、別個に製造し、そのミシンの仕様によって異なる送り台１２０、１２１をそれぞれ組み付けると言う方法が採られていた。
【特許文献１】
特開２０００−２２５２８０号公報
【００１０】
【発明が解決しようとする課題】
しかしながら、糸切り装置の有無により異なる送り歯の規格毎に別個に送り台を用意する従来の方法においては、送り台と言うミシンにおいて主要な部品を規格の異なる送り歯の数だけ新たに部品を起こさなければならず、製造コストが高くなってしまっていた。さらに、別の規格の送り歯に交換する際に、いちいちミシンから送り台を取り外して交換しなければならず、特に釜機構、送り装置周辺の空間的制限の強い二本針ミシンにおいては大変煩わしい作業となってしまっていた。
【００１１】
これらの問題点を鑑み、本発明は、糸切り装置の有無などのミシンあるいは送り歯の仕様の差違に関わらず共通する送り台を使用し、複数種類の送り台を起こす必要がなく送り歯の揺動位置の大きな変更にも容易に対応可能であるミシンの送り装置を提供することを目的とする。
【００１２】
さらには、交換する送り歯（特に、市販ゲージの送り歯）を取り付け易い、すなわち該送り歯を取り付ける際に容易に針板あるいはミシン針と所望の位置関係に送り台に固定可能な送り装置を提供することを第２の目的とする。
【００１３】
【課題を解決するための手段】
上記目的を達成するために、請求項１に記載のミシンの送り装置は、ミシンの針板下方において送り運動を行なうと共に上部に送り歯取付部を形成した送り台と、上端に第１歯部を形成すると共に下部に前記送り歯取付部へ固定される第１固定部を形成し、該第１固定部を前記送り歯取付部に固定した際に前記送り台の送り運動に従って第１歯部が針板上面から出没可能とする前記第１固定部と第１歯部との間の上下方向の間隔を有した第１の送り歯と、上端に第２歯部を形成すると共に下部に前記送り歯取付部へ固定される第２固定部を形成し、該第２固定部を前記送り歯取付部に固定した際に前記送り台の送り運動に従って第２歯部が針板上面より下方で揺動する前記第２固定部と第２歯部との間の上下方向の間隔を有した第２の送り歯と、を有し、第１または第２の送り歯を選択的に設けて使用するミシンの送り装置であって、前記送り台の送り歯取付部と前記第２の送り歯の第２固定部との間に配置され、第２の送り歯を送り歯取付部に固定し送り台が送り運動を行なった際に前記第２歯部が針板上面から出没可能とする高さを有した取付具を備えたことを特徴としている。
【００１４】
該請求項１に記載の本発明によれば、駆動手段に固定され所定の送り運動を行うと共に第１の送り歯の第１固定部を装着して第１歯部を針板上面に出没させる送り台に、前記送り台の送り歯取付部に送り歯固定部を固定すると針板上面より下方で送り歯歯部が揺動するように該歯部が配置される例えば市販ゲージの送り歯などの第２の送り歯を利用する時、前記送り台と第２の送り歯のそれぞれの針板に対する間隔調整を行なう取付具を第２固定部及び送り歯取付部の間に配置したものである。
【００１５】
また、さらに上記目的を達成するために、請求項２に記載のミシンの送り装置は本発明の請求項１に記載のミシンの送り装置において、前記取付具に、前記送り台に対して前記取付具を所定の姿勢になるよう案内する第１の位置決め手段と、前記取付具に対して前記第２の送り歯が所定の姿勢になるよう案内する第２の位置決め手段と、の少なくとも一方を設けたことを特徴としている。
【００１６】
【発明の実施の形態】
以下、図面に基づいて本発明の実施の形態を説明する。
【００１７】
まず、図１、２は本発明の一実施例を示す説明図であり、図１は本発明の送り装置の各構成の説明図で、図２は本発明の送り装置のミシンベッドおよび針板との配置関係などを説明する図３におけるＹ―Ｙ線から矢符方向に見た断面図に相当する図である。尚、ここで、従来と同一の構成については同じ符号を付し詳細な説明は省略する。
【００１８】
図１において、送り台１２０は糸切り装置１８の構成および動作軌跡を避け針板から下方へ離隔した位置に送り歯取付部１２０ｃを形成した図８に示す糸切り装置１８を備えた仕様のミシンに取り付けていた送り台１２０と同じものであり、水平送り装置１３および上下送り装置１４に示される駆動手段によりミシンベッド２０および針板２１の下方で略だ円軌跡に揺動する送り運動を繰り返す。そして、この送り台１２０を糸切り装置１８を有さない仕様のミシンに取り付けた様子を示したのが図２であり、ここでは糸切り装置１８を備えない仕様なので第２の送り歯としての歯厚の厚い市販ゲージの送り歯１００を用いている。該送り歯１００は送り歯取付具１１を介して所定の姿勢で送り台１２０の送り歯取付部１２０ｃに固定されている。尚、第１の送り歯としては、この送り台１２０の送り歯取付部１２０ｃに送り歯固定体を固定して、その歯部が針板２１と所定の高さ関係となる図７、８に示した送り歯１０２が相当し、すなわち第１歯部、第１固定部として歯部１０２ｄおよび送り歯固定部１０２ｃがそれぞれ相当する。
【００１９】
該送り歯取付具１１（取付具）は、送り歯１００の送り歯固定部１００ｃ（第２固定部）の幅に略一致する幅を有し底部に送り歯固定面１１ｃを形成する第２の位置決め手段としての送り歯固定ガイド溝１１ａと、送り台１２０の送り歯取付部１２０ｃの幅に略一致した幅を有する第１の位置決め手段として取付具固定ガイド溝１１ｂと、該送り歯固定面１１ｃから取付具固定ガイド溝１１ｂの底面まで貫通したネジ穴と、からなるブロック状の狭持部１１ｈを形成しており、その高さｈは送り台１２０の送り歯取付部１２０ｃと図５に示す送り歯１００を適当な高さに固定する送り台１２１の送り歯取付部１２１ｃとの高さの差に相当する。言い換えれば、該狭持部１１ｈの高さｈは、糸切り装置を備えた仕様のミシンに用いられる送り歯１０２の歯部１０２ｄ上端から送り歯固定部１０２ｃ下面までの高さと、市販ゲージの送り歯１００の歯部１００ｄ上端から送り歯固定部１００ｃ下面までの高さと、の差と略一致する。
【００２０】
さらに、該送り歯取付具１１は、送り台１２０の送り歯取付部１２０ｃを取付具固定ガイド溝１１ｂに嵌挿し該送り歯取付部１２０ｃに該送り歯取付具１１下部を固定して送り台１２０と送り歯取付具１１とを所定の姿勢にすると共に、送り歯１００の送り歯固定部１００ｃを送り歯固定面１１ｃとしての送り歯取付具上部に設けられた送り歯固定ガイド溝１１ａに嵌挿し固定して送り歯取付具１１と送り歯１００とを所定の姿勢にすることにより、送り台１２０、送り歯取付具１１および送り歯１００を所望の位置関係とすることができる。すなわち、送り歯１００は送り歯取付具１１の狭持部１１ｈの高さｈにより所定の高さになる一方で、位置決め手段としての取付具固定ガイド溝１１ｂおよび送り歯固定ガイド溝１１ａとによりミシン機枠に対して所定の姿勢となる。そこで、送り歯取付ネジ１００Ａを送り歯１００、および送り歯取付具１１のネジ穴に挿通して該両者を送り台１２０の送り歯取り付け部１２０ｃにネジ止めし固定する。これにより容易に針板２１との平行あるいはミシン針１６との同心を取ることができる。なお、送り台１２０の送り歯取付部１２０ｃは、上下送り装置１４および水平送り装置１３とからなる駆動手段に基台１２０ａを組み付けた時点で、ミシン機枠に対して所定の位置・姿勢になるようになっている。
【００２１】
以上のような構成とすることで、共通した一つの送り台で多種の送り歯を選択的に使用することができると共に、送り歯と送り台の間に紙等のシート片などを挟むような方法では対処し得ない調整距離の長い揺動位置の変更を可能にする。また、送り歯固定ガイド溝および取付具固定ガイド溝等の位置決め手段を設けることにより送り歯は細かい調整を必要とせずに送り台と、すなわちミシン機枠と、所定の位置関係を有して固定することができる。
【００２２】
最も有効と考えられる本発明の利用は、上述のように糸切り装置を備えたミシンに対応した送り台を共通して用いる送り台に選択すると共に、該送り台に市販ゲージの送り歯を取り付け可能な送り歯取付具を設けることであり、これにより、新たに送り台や送り歯を起こすことなく、該糸切り装置を備えたミシンに対応した送り台で既製の規格の送り歯（市販ゲージ）とその送り台に対応した特有の規格の送り歯とを共に選択的に用いることができるようになる。
【００２３】
本発明は、上記実施例に限定されるものではなく、その技術的範囲を逸脱しない限りにおいて形状や構成を変更可能であり、種々の態様が考えられる。
【００２４】
例えば、上記実施例では送り歯取付具１１は第１，２位置決め手段を備えたものとしたが、必ずしも備えてなくてもよく、また、どちらか一方のみ備えた構成としてもよいし、どちらも備えないものであってもよい。また、第１，２位置決め手段を溝とし送り歯および送り台をそれぞれ嵌挿する態様としたが、固定時に所定の姿勢で固定できればその態様は問わない。例えば、送り台１２０の送り歯取付部１２０ｃ上面に溝部を形成し、該溝部に送り歯取付具１１の下端が嵌挿するようにしてもよいし、位置決め可能な形状あるいは数量の嵌入ピンおよび嵌入穴を設け嵌合、固定するなどしてもよい。
【００２５】
また、送り歯取付ネジ１００Ａは送り装置の外方へ露出し取り扱いやすい位置に設けることが好ましい。配設位置によっては針板を外すのみでの送り歯の交換（送り歯取付具の送り台への取り付けも含む）も可能とすることが出来る。また、上記実施例では送り歯取付具１１を用いて送り歯１００を送り台１２０に適用する際に、送り歯取付ネジ１００Ａを用い、送り歯取付部１２０ｃへ送り歯１００および送り歯取付具１１を同時に固定する態様を示したが、別の固定ネジを用意し、送り歯取付部１２０ｃと送り歯取付具１１，送り歯取付具１１と送り歯固定部１００ｃ、のように各部材間の固定位置でそれぞれに固定するようにしてもよい。
【００２６】
また、上記実施例では糸切り装置１８の有無による送り歯の交換についてのみ説明したが、例えば、糸切り装置１８を備えたミシンにおいて該糸切り装置１８を使用するモードと、糸切り装置１８を作動させずに縫目の完成度を重視するモードと、で異なる仕様の送り歯を選択的に取り付けるような場合でもよい。ここで、糸切り装置１８を作動させないモードにおいては、糸切り装置の可動部材の可動時軌道上は自由な空間として送り歯取付具を含む送り装置の構成が設けられても良いし、あるいは糸切り装置１８の送り装置近傍にせり出した部材を取り外して送り歯取付具を始め送り装置を配設可能な空間を広げるようにしてもよい。例えば、図７、８のような構成の糸切り装置１８であれば、固定メス１８ｂ、動メス１８ａ、下糸保持部材１８ｄ等の部材を取り外せば送り台１２０の送り歯取付部１２０ｃ近傍は自由度が高くなり各種仕様の送り歯を取り付け可能になる。
【００２７】
また、上記実施例の説明および説明図では上下送り連結ピン１４ｃを偏心ピンとした構成としたが、該上下送り連結ピンを偏心ピンとしておかなくてもよいし、上記説明のように送り歯の揺動位置の変更手段を本発明のものと併用してもよい。このように両揺動位置変更手段を併用する構成とした場合、例えば、大きな位置調整は送り歯取付具１１を用い、微調整には偏心した上下送り連結ピン１４ｃを用いるような利用が考えられる。
【００２８】
また、送り台の駆動も送り歯を所定のだ円軌跡で揺動し縫製物の送り運動を実行できればよく、その態様は問わない。
【００２９】
【発明の効果】
以上のように、本発明によれば、ミシンの仕様に関わらず共通した１種類の送り台を用いることができ、それにより送り歯の交換時に煩わしい送り台の交換作業を行なわなくて済むと共に送り歯の規格の数だけ送り台を作る必要をなくすことができコストと手間の低減をすることができる。
【００３０】
また、送り歯取付具を送り台に固定可能且つ送り歯を固定可能な構成としたことで、送り歯固定体の揺動位置の大きな変更が可能となり、すなわち送り歯歯部上端から送り歯固定体下面までの高さの大きく異なる複数の送り歯を一つの送り台に適用することが可能となる。さらに市販ゲージなどの既製の規格の送り歯も容易に対応させることができ、新たな送り歯を起こす必要を無くすことができ、比較的流通量が多く安価な送り歯を利用することができる。
【００３１】
また、送り台と送り歯取付具、送り歯取付具と送り歯の固定部に位置決め手段を設けることにより、取り付けた送り歯を容易に送り台の送り歯取付部に対して決まった位置関係とすることができる。ここで、送り台の送り歯取付部はミシン機枠と所定の位置関係で設けられているので、すなわち取り付けられた送り歯は容易にミシンベッドおよび針板と所定の位置関係にすることができ、針との同心や針板との平行などを取る手間が大幅に低減することができる。さらに、送り歯取付具と送り歯の固定箇所に位置決め手段を設けていれば、高さに変更のない送り歯の交換、例えば針巾変更に伴う送り歯の交換時などにも、容易に送り歯を所望の姿勢とすることができ針との同心や針板との平行などを取る作業を容易に行なうことができる。
【図面の簡単な説明】
【図１】本発明の送り装置の各構成を示す説明図である。
【図２】本発明の送り装置の配置を示す説明図である。
【図３】一対の水平釜を有する一般的な二本針本縫いミシンの構成を説明する説明図である。
【図４】図３のＹ―Ｙ線の矢符側の送り装置周辺を説明する概略説明図である。
【図５】図３のＹ―Ｙ線から矢符方向に見た送り装置周辺を説明する断面説明図である。
【図６】糸切り装置の有無による送り歯の違い及び縫いへの影響を比較した説明図である。
【図７】糸切り装置を備えたミシンの図４に対応する説明図である。
【図８】糸切り装置を備えたミシンの図５に対応する説明図である。
【符号の説明】
１００（第２の送り歯），１０１，１０２（第１の送り歯） 送り歯
１００Ａ，１００ａ，１０２ａ 送り歯取付ネジ
１００ｂ，１０１ｂ，１０２ｂ 針穴
１００ｃ（第２固定部），１０２ｃ（第１固定部） 送り歯固定部
１００ｄ（第２歯部），１０１ｄ，１０２ｄ（第１歯部） 歯部
１１ 送り歯取付具（取付具） １１ａ 送り歯固定ガイド溝（第２の位置決め手段）
１１ｂ 取付具固定ガイド溝（第１の位置決め手段） １１ｃ 送り歯固定面
１１ｈ 狭持部 １２０，１２１ 送り台
１２０ａ，１２１ａ 基部（送り台基部）
１２０ｃ，１２１ｃ 送り歯取付部 １３ 水平送り装置
１３ａ 水平送り腕 １３ｂ 水平送りピン １３ｓ 水平送り軸
１４ 上下送り装置 １４ａ 上下送り偏心カム １４ｂ 上下送りリンク
１４ｃ 上下送り連結ピン １４ｄ 連結ピン固定ネジ １４ｓ 上下送り軸
１５ 釜台 １６ ミシン針 １７ 釜（ミシン釜） １７Ａ 中釜
１７ａ 突起部 １７ｂ 外釜 １７ｃ ボビン １８ 糸切り装置
１８ａ 動メス １８ｂ 固定メス １８ｃ 動メス固定台
１８ｄ 下糸保持体 １８ｅ 動メス駆動ピン １８ｆ 動メス駆動腕
１８ｇ 動メス駆動軸 １８ｈ 動メス固定台ガイド ２０ ミシンベッド
２１ 針板 ２１ａ 中釜回り止め Ｔ１ 上糸 Ｔ２ 下糸
Ｄ，ｄ 歯厚（送り歯歯厚） ｈ 狭持部高さ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a feeder for a sewing machine that selectively uses a plurality of types of feed dogs.
[0002]
[Prior art]
First, FIG. 3 is an explanatory view illustrating the configuration of a general two-needle lockstitch sewing machine having a pair of horizontal hooks. Here, reference numeral 16 denotes a pair of sewing needles, which are held in a pair at right angles to the feed direction by a needle bar (not shown) supported by a sewing machine frame, and are driven downward by the sewing machine 16 when the sewing machine is driven. A stitch is formed on the sewing product in cooperation with a pair of hooks provided and shown at 17. In addition, reference numeral 20 denotes a sewing machine bed, and for convenience of explanation, some components are omitted from the drawing together with the needle plate in FIG. The components are arranged substantially symmetrically left and right in the feed direction about the pair of sewing needles 16, and components having the same function are denoted by the same reference numerals without distinction.
[0003]
Here, the shuttle 17 includes an outer shuttle 17b, a middle shuttle 17A (not shown) having a projection 17a, and a bobbin 17c. In addition, a feed device including a feed table 121 and a feed dog 100, which will be described later, is provided between the left and right hooks 17, 17. The feed dog 100 is a commercially available gauge (standard product) having a predetermined standard commonly used in a normal specification that does not include a thread cutting device of many two-needle lockstitch sewing machines. It is composed of a tooth part 100d for contacting and separating the cloth and feeding the cloth and a fixing part 100c for supporting the tooth part. The lower surface of the feed dog fixing portion 100c is fixed to the feed dog mounting portion 121c of the feed base 121 with a mounting screw 100a. At this time, when the tooth portion 100d of the feed dog 100 is arranged in a predetermined height relationship with the needle plate 21 so that the tooth portion 100d protrudes and retracts on the upper surface of the needle plate 21 during the feed motion of the feed base 121, The tooth fixing portion 100c is formed at a height close to the needle plate 21. By the cooperation of these, the cloth on the sewing machine bed 20 is sent, and the upper thread T (not shown) is sent. 1 And lower thread T 2 And sewn. The feed table 121 includes a base 121a fixed to a driving means described later, and a feed dog mounting portion 121c to which a lower end of the feed dog fixing portion 100c of the feed dog 100 as a commercially available gauge is detachably mounted. At this time, when the feed dog 100 is attached to the feed dog mounting portion 121c and the tooth portion 100d of the feed dog 100 is arranged in the above-described predetermined height relationship with the needle plate 21, the feed dog fixing is performed. The portion 100c and the feed dog attaching portion 121c are formed so as to be arranged at a height close to the needle plate 21.
[0004]
Next, FIGS. 4 and 5 are explanatory views illustrating the feeder of the sewing machine, and a part of the configuration is omitted for convenience of description. Here, FIG. 4 is a plan view explanatory view of a side indicated by an arrow of the YY line in FIG. 3, and FIG. 5 is an explanatory view of a cross section taken along the line YY in the direction of the arrow. . 4 and 5, reference numeral 15 denotes a shuttle stand fixed to a sewing machine frame (not shown), and reference numeral 21 denotes a needle plate whose upper surface is substantially coincident with the sewing machine bed 20. Further, reference numeral 21a denotes an inner hook stopper for preventing the rotation of the inner hook by preventing the rotation of the inner hook by projecting the inner hook projecting portion 17a in the middle between the pair and projecting from the lower surface of the needle plate. Here, the base 121a of the feed base 121 has an elliptical trajectory by a combination of a horizontal swinging motion by the horizontal feeding device 13 as a driving means and a vertical swinging motion by the vertical feeding device 14. Perform a feeding motion. The feed dog 100, which is a commercially available gauge fixed to the feed base 121 by the feed movement of the feed base 121a, causes the tooth portion 100d of the feed tooth 100 to protrude and retract on the upper surface of the needle plate 21, and the reciprocating movement in the feed direction. , And the sewing material is repeatedly fed. The horizontal swinging motion of the horizontal feeder 13 is transmitted via the horizontal feed arm 13a and the horizontal feed pin 13b by the rotational swinging motion of the horizontal feed shaft 13s rotatably supported by the sewing machine frame. The vertical oscillating motion of the horizontal feed device 13 in the direction of the double arrow B in the drawing, and the vertical oscillating motion of the vertical feed device 14 is controlled by a vertical feed shaft (a shuttle drive) rotatably supported by the sewing machine frame. Rotation of 14s (also serving as a shaft) is transmitted through the vertical feed eccentric cam 14a, the vertical feed link 14b, and the vertical feed connecting pin 14c, and is a swinging motion of the vertical feed device 14 in the direction of the double arrow C in the drawing.
[0005]
In this feeder, it may be necessary to attach a feed dog of a different standard according to sewing conditions, a change in the specifications of the sewing machine itself, or the like. For example, there is a case depending on whether or not a thread cutting mechanism 18 (details will be described later) is mounted. In this case, various types of thread trimming mechanisms 18 are conceivable, but many types of thread trimming devices are located between the shuttle 17 and the feed dog 101 and the tooth portion 101d of the feed dog 101 as shown in FIG. The moving knife 18a passes through a position close to the predetermined thread T 1 , T 2 Capture and execute the disconnection. Here, the tooth thickness d of the tooth portion 101d of the feed dog 101 is smaller than the tooth thickness D of the tooth portion 100d of the feed tooth 100 of the commercially available gauge as shown in FIG. 6B so as to avoid the movement locus of the moving knife 18a. It is formed thin. Here, the tooth thickness of the commercially available gauge is set to 2.6 mm, for example, D: d = 2.6: 2.4 (mm). In this way, the feed dog manufactured with a standard different from the commercially available gauge is also diverse depending on the configuration of the thread cutting device of each sewing machine and the movement trajectory of the moving knife, etc., according to different standards for each sewing machine manufacturer. It can be said that it is manufactured.
[0006]
As shown in FIGS. 6A and 6B, the tooth thicknesses d and D of the tooth portions 101d and 100d of the feed dog may be different due to the presence or absence of the thread cutting device 18, and the like. As for, the quality of the seam is higher when sewing is performed with the feed dog 100 (d <D) having the larger tooth thickness. As shown in FIG. 1 And the lower thread T 2 In the process of knotting, the upper thread T derived from the lower end edges of the needle holes 101b, 100b formed in the feed dog portions 101d, 100d. 1 In the case where the tooth portion of the feed dog has a small tooth thickness (FIG. 6 (a)) at the position where the inner hook 21a comes into contact with the inner hook detent 21a, the inner hook detent 21a The difference in height to the tip of the upper thread is large, and the upper thread T 1 Cannot be obtained due to the resistance generated at the corresponding contact due to bending, and the formation of beautiful stitches is hindered. On the other hand, in the thicker tooth D of the feed dog portion (FIG. 6 (b)), the difference in height from the edge from which the thread at the lower end of the needle hole 100b is led to the tip of the inner hook stopper 21a is relatively small. Needle thread T at a large angle 1 Are in contact with the inner hook stopper 21a, so that resistance that hinders formation of a seam is hardly generated. For this reason, it is desirable to attach the feed dog 101 having a small tooth thickness when the thread trimming device is provided, and to attach the feed dog having the thick tooth thickness when the thread trimming device is not mounted. Further, as shown in FIG. 6 (b), it is better to use a commercially available gauge feed dog 100 as a thick feed dog because it is a ready-made standard feed dog and has a large amount of circulation, so that the cost can be reduced. It is more preferable.
[0007]
Now, as described above, when the feed dogs 100 and 101 of different standards are selectively provided and used in the feed dog mounting portion 121c of the feed base 121 depending on the presence or absence of the thread cutting device, the tooth portions 100d of the feed dogs 100 and 101 are used. Due to the difference in the vertical spacing (height) from 101d to the feed dog fixing portions 100c, 101c, the positions of the tooth portions 100d, 101d with respect to the needle plate may differ. However, in sewing, the amount (height) of the tooth portions 100d and 101d of the feed dog on the upper surface of the needle plate 21 is a factor that largely affects the quality of sewing, and at a predetermined height that matches sewing conditions. Need to be. Therefore, a means for vertically adjusting the swinging position of the feed dog moving in a substantially elliptical locus is required. Conventionally, for example, as shown in FIG. 5, the vertical feed connecting pin 14c for connecting the vertical feed link 14b of the vertical feed device 14 and the feed base 121a is an eccentric pin, and the vertical feed connecting pin 14c is connected to the vertical feed link 14b. The swing position of the feed dog 100 has been moved in the vertical direction by adjusting the vertical eccentric direction of the vertical feed connecting pin 14c when the feed dog 100 is fixed by the connecting pin fixing screw 14d. (For example, refer to Patent Document 1.)
However, with the improvement of the function and performance of the thread cutting device, the configuration has been increased or increased. FIGS. 7 and 8 are explanatory views in the case where the thread trimming device 18 is provided in the two-needle lockstitch sewing machine. The thread cutting device 18 rotates a moving knife driving shaft 18g and a moving knife driving arm 18f fixed to the moving knife driving shaft 18g in a double arrow R direction in FIG. It acts on the moving knife drive pin 18e slidably inserted into the notch of the drive arm 18f. The moving knife driving pin 18e is fixed to a moving knife fixing table 18c to which the moving knife 18a is fixed, and transmits the action of the moving knife driving arm 18f to the moving knife fixing table 18c. The moving knife 18a is moved together with the moving knife fixing table 18c along the moving knife fixing table guide 18h by the driving force from the moving knife driving shaft 18g and the moving knife driving arm 18f transmitted through the moving knife driving pin 18e. 7 and 8, it is moved back and forth in the direction of the double arrow A. 7 and 8, the moving knife 18a, which has advanced to the right in FIGS. 7 and 8, captures a thread to be cut between the shuttle 17 and the needle hole 102b formed in the tooth portion 102d of the feed dog 102, and It retreats to the left and cuts the captured yarn in cooperation with the fixed knife 18b. Furthermore, the lower thread T after cutting 2 A lower thread holding member 18d for holding the thread end of the moving knife 18a is provided below the moving knife 18a.
[0008]
When such a thread cutting device 18 is provided, as shown in FIG. 8, the configuration of the thread cutting device 18, in this case, the fixed knife 18b, the moving knife 18a, and the lower thread holding body 18d are replaced with the commercially available gauge shown in FIG. When the feed dog 100 is mounted, the feed dog 100 protrudes into a space where the feed dog mounting portion 121c and the feed dog fixing portion 100c are located. Therefore, the feed stand 120 in FIG. 8 has a configuration in which the feed dog mounting portion 120c is formed at a low position separated from the needle plate 21 so as to avoid the respective components of the thread cutting device 18, and a thread cutting device. A feed dog 102 having a relatively large vertical distance (height) from the feed dog portion to the feed dog fixing portion, which is a feed dog having a small tooth thickness when provided, is fixed. By setting the position where the feed dog mounting portion 120c of the feed base 120 is fixed to the feed dog fixing portion 102c of the feed dog 102 at a low position separated downward from the needle plate 21, the feed device performs the feed motion. Even so, the components of the feeder and the components of the thread cutting device 18 do not interfere with each other.
[0009]
In such a case, there is no applicable invention as a document known invention, but the feeder is separately manufactured with a specification 120 having a thread cutting device and a specification 121 without a thread cutting device. According to the specifications described above, a method of assembling different feed stands 120 and 121 respectively has been adopted.
[Patent Document 1]
JP 2000-225280 A
[0010]
[Problems to be solved by the invention]
However, in the conventional method in which a feeder is separately prepared for each feed dog standard that differs depending on the presence or absence of the thread cutting device, the main parts of the feeder are newly replaced by the number of feed dogs of different standards. This had to be done and the manufacturing costs were high. Furthermore, when changing to a feed dog of a different standard, the feed base must be removed from the sewing machine and replaced each time, especially in the case of a twin needle sewing machine with a strong spatial restriction around the shuttle mechanism and the feeder. It had to be work.
[0011]
In view of these problems, the present invention uses a common feed base regardless of the difference in the specifications of the sewing machine or feed dog, such as the presence or absence of a thread trimming device, and it is not necessary to raise a plurality of types of feed bases, An object of the present invention is to provide a feeder for a sewing machine that can easily cope with a large change in a swing position.
[0012]
Further, there is provided a feeder which can easily attach a replacement feed dog (especially a feed dog of a commercially available gauge), that is, can easily fix the feed dog to a feed base in a desired positional relationship with a needle plate or a sewing machine needle when mounting the feed dog. The second purpose is to provide.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, a feed device for a sewing machine according to claim 1 performs a feed movement below a needle plate of the sewing machine and has a feed dog mounting portion formed on an upper portion thereof, and a first tooth portion on an upper end. And a first fixing portion fixed to the feed dog mounting portion is formed at a lower portion, and the first tooth portion follows the feed motion of the feed base when the first fixing portion is fixed to the feed dog mounting portion. A first feed dog having a vertical spacing between the first fixed portion and the first tooth portion that can be retracted from the upper surface of the needle plate, and a second tooth portion formed at the upper end and the lower portion formed at the lower portion. A second fixing portion is formed to be fixed to the feed dog mounting portion. When the second fixing portion is fixed to the feed dog mounting portion, the second tooth portion is below the upper surface of the needle plate according to the feed motion of the feed bar. A second feed dog having a vertical spacing between the oscillating second fixed portion and the second tooth portion A feeder for a sewing machine, wherein the feeder is provided with a first or second feed dog selectively, and wherein a feed dog mounting portion of the feed base and a second fixing portion of the second feed dog are provided. And a height which allows the second tooth to be protruded and retracted from the upper surface of the needle plate when the second feed dog is fixed to the feed dog mounting portion and the feed base performs a feeding motion. It is characterized by having.
[0014]
According to the first aspect of the present invention, the first feeding portion is fixed to the driving means, performs a predetermined feeding motion, and the first fixing portion of the first feed dog is mounted so that the first tooth portion protrudes and retracts on the upper surface of the needle plate. When the feed dog fixing portion is fixed to the feed dog on the feed dog, the feed tooth portion is arranged so that the feed tooth portion swings below the upper surface of the needle plate. When the second feed dog is used, an attachment for adjusting the interval between the feed base and the second feed dog with respect to the respective needle plates is disposed between the second fixing portion and the feed dog mounting portion. .
[0015]
In order to further achieve the above object, the feeder for a sewing machine according to claim 2 is the feeder for a sewing machine according to claim 1 of the present invention. At least one of first positioning means for guiding the tool to a predetermined posture and second positioning means for guiding the second feed dog to a predetermined attitude with respect to the mounting tool. It is characterized by having.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0017]
First, FIGS. 1 and 2 are explanatory views showing an embodiment of the present invention. FIG. 1 is an explanatory view of each configuration of the feeder of the present invention. FIG. 2 is a sewing machine bed and a needle plate of the feeder of the present invention. FIG. 4 is a view corresponding to a cross-sectional view taken along line YY in FIG. Here, the same components as those in the related art are denoted by the same reference numerals, and detailed description is omitted.
[0018]
In FIG. 1, a feed stand 120 is provided with a thread cutting device 18 shown in FIG. 8 in which a feed dog mounting portion 120c is formed at a position separated downward from the needle plate while avoiding the structure and operation trajectory of the thread cutting device 18. , Which is the same as the feed table 120 attached to the sewing machine, and repeats a feed motion that swings in a substantially elliptical locus below the sewing machine bed 20 and the needle plate 21 by driving means shown in the horizontal feed device 13 and the vertical feed device 14. . FIG. 2 shows a state in which the feed table 120 is attached to a sewing machine having a specification that does not have the thread cutting device 18. FIG. A commercially available feed dog 100 having a large tooth thickness is used. The feed dog 100 is fixed to the feed dog mounting portion 120c of the feed base 120 in a predetermined posture via the feed dog mounting fixture 11. As the first feed dog, a feed dog fixed body is fixed to the feed dog mounting portion 120c of the feed base 120, and the tooth portion has a predetermined height relationship with the needle plate 21 in FIGS. The illustrated feed dog 102 corresponds, that is, the tooth portion 102d and the feed dog fixing portion 102c correspond to the first tooth portion and the first fixing portion, respectively.
[0019]
The feed dog attachment 11 (attachment) has a width substantially equal to the width of the feed dog fixing portion 100c (second fixing portion) of the feed dog 100, and forms a feed dog fixing surface 11c at the bottom. A feed dog fixing guide groove 11a as a positioning means, a fixture fixing guide groove 11b as a first positioning means having a width substantially matching the width of the feed dog mounting portion 120c of the feed base 120, and the feed dog fixing surface 11c And a screw hole that penetrates to the bottom surface of the fixture fixing guide groove 11b to form a block-shaped holding portion 11h composed of a screw hole, the height h of which is shown in FIG. This corresponds to a difference in height between the feed dog 121 and the feed dog mounting portion 121c of the feed base 121 for fixing the feed dog 100 at an appropriate height. In other words, the height h of the holding portion 11h is determined by the height from the upper end of the tooth portion 102d of the feed dog 102 to the lower surface of the feed dog fixing portion 102c used in a sewing machine having a thread trimming device, and the feed of a commercially available gauge. The height substantially coincides with the height from the upper end of the tooth portion 100d of the tooth 100 to the lower surface of the feed dog fixing portion 100c.
[0020]
Further, the feed dog mounting fixture 11 is configured such that the feed dog mounting part 120c of the feed base 120 is fitted into the mounting fixture fixing guide groove 11b, and the lower part of the feed dog mounting fixture 11 is fixed to the feed dog mounting part 120c. And the feed dog fixture 11 in a predetermined posture, and the feed dog fixing portion 100c of the feed dog 100 is fitted into the feed dog fixing guide groove 11a provided on the feed dog fixture as the feed dog fixing surface 11c. By fixing the feed dog fixture 11 and the feed dog 100 in a predetermined posture, the feed base 120, the feed dog fixture 11 and the feed dog 100 can be in a desired positional relationship. That is, while the feed dog 100 has a predetermined height by the height h of the holding portion 11h of the feed dog mounting tool 11, the sewing machine is formed by the mounting tool fixing guide groove 11b and the feed dog fixing guide groove 11a as positioning means. It takes a predetermined posture with respect to the machine frame. Therefore, the feed dog mounting screw 100A is inserted into the screw holes of the feed dog 100 and the feed dog mounting tool 11, and both are screwed and fixed to the feed dog mounting portion 120c of the feed base 120. Thereby, it is possible to easily take parallel with the needle plate 21 or concentric with the sewing needle 16. The feed dog mounting portion 120c of the feed base 120 assumes a predetermined position and posture with respect to the sewing machine frame when the base 120a is assembled to the driving means including the vertical feed device 14 and the horizontal feed device 13. It has become.
[0021]
With such a configuration, it is possible to selectively use various kinds of feed dogs with one common feed slide, and to sandwich a sheet piece such as paper between the feed dog and the feed slide. It is possible to change the swing position with a long adjustment distance that cannot be dealt with by the method. Also, by providing positioning means such as a feed dog fixing guide groove and a fixture fixing guide groove, the feed dog is fixed with a predetermined positional relationship with the feed base, that is, the sewing machine frame without requiring fine adjustment. can do.
[0022]
The most effective use of the present invention is to select a feeder commonly used for a sewing machine having a thread trimming device as described above as a feeder commonly used and to attach a feed dog of a commercially available gauge to the feeder. A feed dog attachment that can be used, so that a feed bar compatible with a sewing machine equipped with the thread cutting device can be manufactured without using a feed bar or a feed dog. ) And a feed dog of a specific standard corresponding to the feed base can be selectively used together.
[0023]
The present invention is not limited to the above embodiments, and the shape and configuration can be changed without departing from the technical scope thereof, and various modes can be considered.
[0024]
For example, in the above-described embodiment, the feed dog attachment 11 is provided with the first and second positioning means. However, the feed dog attachment 11 is not necessarily provided, and may be provided with only one of them. It may not be provided. Further, the first and second positioning means are grooves and the feed dog and the feed base are respectively fitted and inserted. However, the form is not limited as long as it can be fixed in a predetermined posture at the time of fixing. For example, a groove may be formed on the upper surface of the feed dog mounting portion 120c of the feed base 120, and the lower end of the feed dog mounting tool 11 may be inserted into the groove. A hole may be provided and fitted or fixed.
[0025]
Further, it is preferable that the feed dog mounting screw 100A is provided at a position which is exposed to the outside of the feed device and is easy to handle. Depending on the arrangement position, replacement of the feed dog by simply removing the needle plate (including attachment of the feed dog fixture to the feed base) can also be made possible. In the above embodiment, when the feed dog 100 is applied to the feed base 120 using the feed dog mounting tool 11, the feed dog 100 and the feed dog mounting tool 11 are attached to the feed dog mounting portion 120c using the feed dog mounting screw 100A. Are fixed at the same time, but another fixing screw is prepared, and fixing between the members is performed, such as the feed dog mounting portion 120c and the feed dog fixing device 11, and the feed dog mounting device 11 and the feed dog fixing portion 100c. It may be fixed at each position.
[0026]
In the above-described embodiment, only the replacement of the feed dog with or without the thread cutting device 18 has been described. For example, a mode in which the thread cutting device 18 is used in a sewing machine having the thread cutting device 18 and a mode in which the thread cutting device 18 is used are described. A mode may be adopted in which a feed dog of a different specification is selectively attached in a mode in which the degree of completion of the seam is emphasized without being operated. Here, in the mode in which the thread cutting device 18 is not operated, the structure of the feeding device including the feed dog attachment may be provided as a free space on the orbit when the movable member of the thread cutting device is movable, or The member protruding in the vicinity of the feed device of the cutting device 18 may be removed to widen the space in which the feed device including the feed dog attachment can be disposed. For example, in the case of the thread cutting device 18 having the configuration as shown in FIGS. 7 and 8, if the members such as the fixed knife 18b, the moving knife 18a, and the lower thread holding member 18d are removed, the vicinity of the feed dog mounting portion 120c of the feed base 120 is free. The degree increases and it becomes possible to attach various types of feed dogs.
[0027]
Further, in the description and the illustration of the above embodiment, the vertical feed connecting pin 14c is configured as an eccentric pin. However, the vertical feed connecting pin does not have to be an eccentric pin, and the feed dog swings as described above. The moving position changing means may be used in combination with the present invention. In the case of using both swinging position changing means in this way, for example, it is conceivable to use the feed dog attachment 11 for large position adjustment and use the eccentric vertical feed connecting pin 14c for fine adjustment. .
[0028]
Also, the drive of the feed table is not limited as long as the feed dog can be swung along a predetermined elliptical locus to execute the feed movement of the sewing product.
[0029]
【The invention's effect】
As described above, according to the present invention, it is possible to use a common type of feeder irrespective of the specifications of a sewing machine. It is possible to eliminate the necessity of making the feed stands by the number of the tooth specifications, thereby reducing the cost and labor.
[0030]
In addition, since the feed dog attachment can be fixed to the feed base and the feed dog can be fixed, the swinging position of the feed dog fixed body can be largely changed, that is, the feed dog is fixed from the upper end of the feed dog portion. It becomes possible to apply a plurality of feed dogs having greatly different heights to the lower surface of the body to one feed table. In addition, ready-made feed dogs such as commercially available gauges can be easily adapted, and it is possible to eliminate the necessity of generating a new feed dog and to use an inexpensive feed dog which has a relatively large amount of circulation.
[0031]
In addition, by providing positioning means on the feed base and the feed dog fixture, and the fixing part of the feed dog fixture and the feed dog, the mounted feed dog can be easily positioned with respect to the feed dog mount of the feed base. can do. Here, the feed dog mounting portion of the feed bar is provided in a predetermined positional relationship with the sewing machine frame, that is, the mounted feed dog can be easily brought into a predetermined positional relationship with the sewing machine bed and the needle plate. In addition, the trouble of concentricity with the needle and parallelization with the needle plate can be greatly reduced. Further, if positioning means is provided at the fixed position of the feed dog mounting bracket and the feed dog, it is easy to feed even when changing the feed dog without changing the height, for example, when changing the feed dog due to the change of the needle width. The teeth can be set in a desired posture, and the operation of obtaining concentricity with the needle, parallelism with the needle plate, and the like can be easily performed.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing each configuration of a feeder of the present invention.
FIG. 2 is an explanatory diagram showing an arrangement of a feeding device of the present invention.
FIG. 3 is an explanatory diagram illustrating a configuration of a general two-needle lockstitch sewing machine having a pair of horizontal hooks.
FIG. 4 is a schematic explanatory diagram for explaining the periphery of a feeder on the arrow side of the line YY in FIG. 3;
FIG. 5 is an explanatory cross-sectional view illustrating the periphery of the feeder as viewed in the direction of the arrow from line YY in FIG. 3;
FIG. 6 is an explanatory diagram comparing differences in feed dogs and effects on sewing when a thread trimming device is provided;
FIG. 7 is an explanatory view corresponding to FIG. 4 of the sewing machine provided with the thread cutting device.
FIG. 8 is an explanatory view corresponding to FIG. 5 of the sewing machine provided with the thread cutting device.
[Explanation of symbols]
100 (second feed dog), 101, 102 (first feed dog)
100A, 100a, 102a Feed dog mounting screw
100b, 101b, 102b Needle hole
100c (second fixing part), 102c (first fixing part) Feed dog fixing part
100d (second tooth), 101d, 102d (first tooth) tooth
11 Feed dog attachment (attachment) 11a Feed dog fixing guide groove (second positioning means)
11b Fixing fixture fixing guide groove (first positioning means) 11c Feed dog fixing surface
11h Holding part 120, 121 Feeding stand
120a, 121a base (feed base)
120c, 121c Feed dog mounting part 13 Horizontal feeder
13a Horizontal feed arm 13b Horizontal feed pin 13s Horizontal feed axis
14 Vertical feed device 14a Vertical feed eccentric cam 14b Vertical feed link
14c Vertical feed connection pin 14d Connection pin fixing screw 14s Vertical feed shaft
15 Hook stand 16 Sewing needle 17 Hook (sewing machine) 17A Middle hook
17a Projection 17b Outer hook 17c Bobbin 18 Thread cutter
18a Moving knife 18b Fixed knife 18c Moving knife fixed base
18d Lower thread holder 18e Moving knife drive pin 18f Moving knife drive arm
18g moving knife drive shaft 18h moving knife fixed stand guide 20 sewing machine bed
21 Needle plate 21a Non-rotating shuttle hook T 1 Needle thread T 2 Lower thread
D, d Tooth thickness (feed tooth thickness) h Narrow part height

Claims (2)

ミシンの針板下方において送り運動を行なうと共に上部に送り歯取付部を形成した送り台と、
上端に第１歯部を形成すると共に下部に前記送り歯取付部へ固定される第１固定部を形成し、該第１固定部を前記送り歯取付部に固定した際に前記送り台の送り運動に従って第１歯部が針板上面から出没可能とする前記第１固定部と第１歯部との間の上下方向の間隔を有した第１の送り歯と、
上端に第２歯部を形成すると共に下部に前記送り歯取付部へ固定される第２固定部を形成し、該第２固定部を前記送り歯取付部に固定した際に前記送り台の送り運動に従って第２歯部が針板上面より下方で揺動する前記第２固定部と第２歯部との間の上下方向の間隔を有した第２の送り歯と、を有し、第１または第２の送り歯を選択的に設けて使用するミシンの送り装置であって、
前記送り台の送り歯取付部と前記第２の送り歯の第２固定部との間に配置され、第２の送り歯を送り歯取付部に固定し送り台が送り運動を行なった際に前記第２歯部が針板上面から出没可能とする高さを有した取付具を備えたことを特徴とするミシンの送り装置。A feed base that performs a feed motion below the needle plate of the sewing machine and has a feed dog mounting part formed on the upper part thereof;
A first fixing portion is formed at an upper end and is fixed to the feed dog mounting portion at a lower portion, and the feed base is fed when the first fixing portion is fixed to the feed dog mounting portion. A first feed dog having a vertical spacing between the first fixed portion and the first tooth portion that allows the first tooth portion to be protruded and retracted from the upper surface of the needle plate in accordance with the movement;
A second fixing portion is formed at an upper end and is fixed to the feed dog mounting portion at a lower portion. When the second fixing portion is fixed to the feed dog mounting portion, a feed of the feed base is performed. A second feed dog having a vertical interval between the second fixed portion and the second tooth portion, wherein the second tooth portion swings below the upper surface of the needle plate in accordance with the movement; Or a feed device for a sewing machine in which a second feed dog is selectively provided and used,
The second feed dog is disposed between the feed dog mounting portion of the feed bar and the second fixing portion of the second feed dog, and when the second feed dog is fixed to the feed dog mount portion and the feed bar performs a feed motion, A feeding device for a sewing machine, comprising: a fitting having a height such that the second tooth portion can protrude and retract from the upper surface of the needle plate. 請求項１に記載のミシンの送り装置において、
前記取付具に、
前記送り台に対して前記取付具を所定の姿勢になるよう案内する第１の位置決め手段と、
前記取付具に対して前記第２の送り歯が所定の姿勢になるよう案内する第２の位置決め手段と、の少なくとも一方を設けたことを特徴とするミシンの送り装置。The feeding device of the sewing machine according to claim 1,
To the mounting fixture,
First positioning means for guiding the mounting fixture to a predetermined posture with respect to the feed base;
And a second positioning means for guiding the second feed dog to a predetermined posture with respect to the mounting tool.
JP2002346609A 2002-11-29 2002-11-29 Feeding device of sewing machine Pending JP2004174120A (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007011553U1 (en) * 2007-08-17 2008-12-24 Dürkopp Adler AG Transporter for the transport of sewing material during the operation of a sewing machine
EP2138619A1 (en) 2008-06-24 2009-12-30 Dürkopp Adler AG Transporter for transporting sewing material while operating a sewing machine
CN105755684A (en) * 2015-01-07 2016-07-13 Juki株式会社 Sewing machine
CN106192227A (en) * 2015-02-25 2016-12-07 蛇目缝衣机工业株式会社 Feed dog handler and possess the sewing machine of this feed dog handler
EP4202100A1 (en) * 2021-12-21 2023-06-28 JUKI Corporation Sewing machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007011553U1 (en) * 2007-08-17 2008-12-24 Dürkopp Adler AG Transporter for the transport of sewing material during the operation of a sewing machine
EP2138619A1 (en) 2008-06-24 2009-12-30 Dürkopp Adler AG Transporter for transporting sewing material while operating a sewing machine
DE102008030000A1 (en) 2008-06-24 2009-12-31 Dürkopp Adler AG Transporter for the transport of sewing material during the operation of a sewing machine
CN105755684A (en) * 2015-01-07 2016-07-13 Juki株式会社 Sewing machine
US10415167B2 (en) 2015-01-07 2019-09-17 Juki Corporation Sewing machine
CN105755684B (en) * 2015-01-07 2020-08-04 Juki株式会社 Sewing machine
CN106192227A (en) * 2015-02-25 2016-12-07 蛇目缝衣机工业株式会社 Feed dog handler and possess the sewing machine of this feed dog handler
EP4202100A1 (en) * 2021-12-21 2023-06-28 JUKI Corporation Sewing machine

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