JP4300020B2

JP4300020B2 - Longitudinal drive device for sewing frame of sewing machine

Info

Publication number: JP4300020B2
Application number: JP2002337520A
Authority: JP
Inventors: 治樹渡邉
Original assignee: 株式会社バルダン
Priority date: 2002-11-21
Filing date: 2002-11-21
Publication date: 2009-07-22
Anticipated expiration: 2022-11-21
Also published as: JP2004167040A

Description

【０００１】
【発明の属する技術分野】
本発明は、加工布を張設する縫製枠をミシンの前後方向に駆動する駆動装置に関するものである。
【０００２】
【従来の技術】
従来のミシンは、図１２に示すように、別の左右方向駆動装置５５によりテーブル５１の直上において左限位置と右限位置との間で左右方向に駆動され、テーブル５１直上に設けられた左右方向に延びる後辺５２ａと前辺５２ｂの一対の長辺５２と、前後方向に延びる左辺５３ａと右辺５３ｂの一対の短辺５３とを持つ四角枠状の縫製枠５４と、縫製枠５４をミシンの前後方向に駆動する前後方向駆動装置５６とを備えたものである。
前後方向駆動装置５６は、左右に相互間隔をおいて設けた複数の前後方向駆動可能な主駆動機構５７からなる。この主駆動機構５７は、左限位置に来る縫製枠５４の右辺５３ｂより左方に最右の主駆動機構５７Ｒを設けており、右限位置に来る縫製枠５４の左辺５３ａより右方に最左の主駆動機構５７Ｌを設けている。このような駆動機構を備えた縫製枠５４は、左限位置に来た縫製枠５４の前辺５２ｂ及び後辺５２ａの左端部が最左の主駆動機構５７Ｌより左方にはみ出すはみ出し部５８Ｌとなり、右限位置に来た縫製枠５４の前辺５２ｂ及び後辺５２ａの右端部が最右の主駆動機構５７Ｒより右方にはみ出すはみ出し部５８Ｒとなる。はみ出し部５８Ｌ、５８Ｒは、主駆動機構５７により直接に駆動されていないため、歪みやすい。このはみ出し部５８Ｌ、５８Ｒが、わずかな長さであれば、歪みは問題にはならない。しかし、はみ出し部５８Ｌ、５８Ｒが、例えば１０００ｍｍを超えるような長さになる大型のミシンにおいて、縫製枠５４が左右方向に大きく駆動されて、特に縫製枠５４が左限位置又は右限位置に来ている時に、前後方向に駆動されると、はみ出し部５８Ｌ、５８Ｒが慣性力により前後方向の駆動についていくことができない。その結果、はみ出し部５８Ｌ、５８Ｒが歪み、縫製の縫い上がりに悪影響を与えるという問題があった。
【０００３】
そこで、はみ出し部５８Ｌ、５８Ｒの歪みを防止するために、図１３に示すように、後辺５２ａの長さ方向に沿って延びて後辺５２ａの左右端部より突出し、後辺５２ａの左右端部を係合し、縫製枠５４を前後方向に駆動する前後方向駆動枠６０を備えているミシンが知られている。この前後方向駆動枠６０は、前後方向駆動枠６０より下方に設けられた前後方向駆動機構６１に、前後方向駆動枠６０の両端部６０ａが支持されて、駆動されるようになっている（例えば、特許文献１参照。）。
【０００４】
【特許文献１】
実公昭６４−１９８９号公報
【０００５】
【発明が解決しようとする課題】
ところが、左右に長い大型のミシンの後辺５２ａに沿って、前後方向駆動枠６０を設けると、前後方向駆動機構６１に負荷がかかり、縫製枠５４を高速に駆動するのことが困難になるという問題がある。
【０００６】
また、左右方向駆動機構６２が右辺５３ｂに係合して、縫製枠５４より下方に設けられている場合、右辺５３ｂより右方に設けられた前後方向駆動機構６１が、縫製枠５４より下方で左右方向駆動機構５５と近接していることになる。この場合、前後方向駆動機構６１と左右方向駆動機構６２とを設けるスペースを確保するため、テーブル５１の左右方向及び前後方向の拡張が必要になるという問題があった。
【０００７】
本発明の第一の目的は、上記課題を解決し、前後駆動装置に無用な負担をかけないので、縫製枠を高速に駆動でき、また、縫製枠のはみ出し部に発生する歪みを防止するミシンの縫製枠の前後方向駆動装置を提供することにある。
【０００８】
本発明の第二の目的は、上記課題を解決し、テーブルを拡張せず、縫製枠のはみ出し部に発生する歪みを防止するミシンの縫製枠の前後方向駆動装置を提供することにある。
【０００９】
【課題を解決するための手段】
上記目的を達成するために、本発明のミシンの縫製枠の前後方向駆動装置は、左右方向駆動装置によりテーブルの直上において左限位置と右限位置との間で左右方向に駆動される四角枠状の縫製枠を前後方向に駆動する前後方向駆動装置であって、左右に相互間隔をおいて設けた複数の前後方向駆動可能な主駆動機構からなり、前記左限位置に来る縫製枠の右辺より左方に最右の主駆動機構を設け、前記右限位置に来る縫製枠の左辺より右方に最左の主駆動機構を設け、もって前記左限位置に来た縫製枠の前辺及び後辺の左端部が前記最左の主駆動機構より左方にはみ出すはみ出し部となり、前記右限位置に来た縫製枠の前辺及び後辺の右端部が前記最右の主駆動機構より右方にはみ出すはみ出し部となる前後方向駆動装置において、前記左右方向駆動装置を前記縫製枠より下方に設け、前記左限位置にある縫製枠の左辺より左方又は前記右限位置にある縫製枠の右辺より右方の一方であって前記縫製枠より上方における平面視で前記左右方向駆動装置と交わる位置に、前後方向駆動可能な一方の補助駆動機構を設けるとともに、前記左辺又は右辺を挟んで並ぶ前記一方の補助駆動機構と前記最左又は最右の一方の主駆動機構とをテーブルより上方で連結する左右方向に延びる一方の補助枠を設け、前記一方の補助枠を一方の前記はみ出し部の一部に係合させることにより、前記一方のはみ出し部を前記一方の補助駆動機構と前記最左又は最右の一方の主駆動機構とにより前記一方の補助枠を介して前後方向に駆動するようにし、前記最左又は最右の一方の主駆動機構を、前記縫製枠より上方又は下方に設け、該最左又は最右の一方の主駆動機構以外の全ての主駆動機構を、前記縫製枠より下方に設け、前記左限位置にある縫製枠の左辺より左方又は前記右限位置にある縫製枠の右辺より右方の他方であって前記縫製枠より下方に、前後方向駆動可能な他方の補助駆動機構を設けるとともに、前記左辺又は右辺を挟んで並ぶ前記他方の補助駆動機構と前記最左又は最右の他方の主駆動機構とをテーブルより上方で連結する左右方向に延びる他方の補助枠を設け、前記他方の補助枠を他方の前記はみ出し部の一部に係合させることにより、前記他方のはみ出し部を前記他方の補助駆動機構と前記最左又は最右の他方の主駆動機構とにより前記他方の補助枠を介して前後方向に駆動するようにしたことを特徴とする。
【００１０】
前記最左又は最右の一方の主駆動機構を、縫製枠より上方と下方のどちらに設けるかは、特に限定されないが、次の（１）（２）の態様を例示できる。
（１）該一方の主駆動機構を縫製枠より上方に設けた態様。
（２）該一方の主駆動機構を縫製枠より下方に設けた態様。
【００１１】
はみ出し部の長さは、特に限定されないが、１０００ｍｍ以上であるときが、はみ出し部の歪みを防止する効果がより顕著である。
【００１２】
補助枠が、縫製枠の前辺のはみ出し部と後辺のはみ出し部のどちらに係合するかは、特に限定されないが、補助枠が、テーブルの後方に設けられている主駆動機構と補助駆動機構とをテーブルより上方で無理なく連結するためには、縫製枠のはみ出し部の後辺部分に係合させることが好ましい。
補助枠を係合させるはみ出し部の一部の位置は、はみ出し部のどこであっても特に限定されないが、縫製枠のはみ出し部の歪みをより効果的に防止するには、縫製枠の左端部又は右端部の最端部からはみ出し部の中間位置までの範囲にあること好ましく、さらに好ましくは、該最端部からはみ出し部の１／３位置までの範囲にあることで、最も好ましくは、該最端部にあることである。
【００１３】
補助枠と縫製枠のはみ出し部との係合は、特に限定されないが、係合ローラと係合凹溝、一対の係合ローラと縦壁等からなることを例示できる。この際、補助枠と縫製枠のはみ出し部とのどちらにどれを設けるかは特に限定されない。
【００１４】
前後方向駆動装置及び左右方向駆動装置のそれぞれの駆動機構としては、特に限定されないが、ベルト駆動機構、ボールネジ駆動機構、リニアモータ等を例示できる。
【００１５】
【発明の実施の形態】
図１〜図７は本発明を具体化した実施形態の多頭式ミシン１とその縫製枠１０の前後方向駆動装置１１を示している。なお、実施形態において、以下に挙げる数値は例示であり、適宜変更できる。また、ミシンにおいては慣行的に左右方向をＸ方向といい、前後方向をＹ方向というので、本明細書でもそれに従う。
このミシンは、床面に立つ支柱２と、支柱２の下部間及び上部間に支持されてそれぞれ左右方向に延びる下フレーム３及び上フレーム４とからなる機枠を有し、下フレーム３にはテーブル５が略水平に支持されている。上フレーム４の前面には複数のミシンヘッド６が左右方向に所定間隔をおいて列設され、下フレーム３には複数のベッド７が各ミシンヘッド６の直下位置にテーブル５と略同一高さで列設されている。周知の通り、ミシンヘッド６で上下往復駆動する針と、ベッド７で回転駆動される釜との協働により、後述する加工布に縫製が行なわれる。
【００１６】
テーブル５直上において加工布を張設する一対の長辺１３と短辺１６持つ四角枠状の縫製枠１０（刺繍ミシンにおいては刺繍枠）が設けられ、この各辺を長辺１３の後辺１４と前辺１５、短辺１６の左辺１７と右辺１８とする。
このミシン１の縫製枠１０は、左右方向駆動装置（以下、Ｘ方向駆動装置とする）１２により左限位置と右限位置との間で左右方向に駆動され、前後方向駆動装置（以下、Ｙ方向駆動装置とする）１１により後限位置と前限位置との間で前後方向に駆動される。
【００１７】
Ｘ方向駆動装置１２は、前後に相互間隔をおいて設けたＸ方向駆動可能なスライダ２２を含むベルト駆動機構である２つのＸ方向駆動機構２１よりなる。この２つのＸ方向駆動機構２１は、後限位置に来る縫製枠１０の前辺１５より後方であって、前限位置に来る縫製枠１０の後辺１４より前方であるように、縫製枠１０の右辺１８より下方に並んで設けられている。また、このＸ方向駆動機構２１同士は、Ｘ方向駆動機構２１の右端部において、テーブル５の後方からＹ方向に延びているベルト駆動軸８によって連結され、駆動力が伝達されている。
Ｘ方向駆動機構２１のスライダ２２には、テーブル５面に設けられているスリット２３から上方に突出した一対の支軸に回転可能に軸着された一対の係合ローラ２４が立設されている。この係合ローラ２４は、右辺１８の下面側に、右辺１８の長さ方向に沿って設けられている縦壁（図示略）の一つにそれを挟むように係合している。
【００１８】
Ｙ方向駆動装置１１は、左右に相互間隔をおいて設けたＹ方向駆動可能なスライダ２２を含むベルト駆動機構である４つの主駆動機構２６と、同じくＹ方向駆動可能なスライダ２２を含むベルト駆動機構を左辺より左方及び右辺より右方の両方に設けた２つの補助駆動機構２７よりなる。
主駆動機構２６は、左限位置に来る縫製枠１０の右辺１８より左方に最右の主駆動機構２６Ｒを設け、右限位置に来る縫製枠１０の左辺１７より右方に最左の主駆動機構２６Ｌを設けるように、縫製枠１０の後辺１４より下方に並んで設けられている。もって左限位置に来た縫製枠１０の前辺１５及び後辺１４の左端部が最左の主駆動機構２６Ｌより左方にはみ出すはみ出し部２８Ｌ（Ｘ方向の長さは、約１２００ｍｍ）となり、右限位置に来た縫製枠１０の前辺１５及び後辺１４の右端部が最右の主駆動機構２６Ｒより右方にはみ出すはみ出し部２８Ｒ（Ｘ方向の長さは、約１２００ｍｍ）となる。
【００１９】
２つの補助駆動機構２７のうち、左方補助駆動機構２７Ｌは左限位置にある縫製枠１０の左辺１７より左方であって左辺１７より下方に主駆動機構２６と並んで設けられている。また、右方補助駆動機構２７Ｒは右限位置にある縫製枠１０の右辺１８より右方であって右辺１８より上方に、一方端はテーブル５の後方に取り付けられ、他方端は上フレーム４に取り付けられ、Ｙ方向に延びて設けられている。この右方補助駆動機構２７Ｒのテーブル５を挟んで下方には、ベルト駆動軸８が設けられている。
これらの主駆動装置２６及び補助駆動機構２７同士は、主駆動機構２６及び補助駆動機構２７の後方の最端部において、テーブル５の右方からＸ方向に延びているベルト駆動軸９によって連結され、駆動力が伝達されている。
【００２０】
よって、左辺１７を挟んで並ぶ左方補助駆動機構２７Ｌと最左の主駆動機構２６Ｌについては、左方補助駆動機構２７Ｌと最左の主駆動機構２６Ｌとが共に縫製枠より下方に設けられ、右辺１８を挟んで並ぶ右方補助駆動機構２７Ｒと最右の主駆動機構２６Ｒについては、右方補助駆動機構２７Ｒが縫製枠１０より上方に設けられ、最右の主駆動機構２６Ｒが縫製枠１０より下方に設けられていることになる。
【００２１】
Ｘ方向駆動機構２１のスライダ２２と同様に、主駆動機構２６のスライダ２２には、テーブル５面に設けられているスリット２３から上方に突出した一対の支軸に回転可能に軸着された一対の係合ローラ２４が立設されている。この係合ローラ２４は、後辺１４の下面側に、後辺１４の長さ方向に沿って設けられている縦壁１４ａの一つにそれを挟むように係合している。
【００２２】
さらに、左方補助駆動機構２７Ｌと左辺１７を挟んで並ぶ最左の主駆動機構２６Ｌのスライダ２２には、スリット２３から上方に突出した取付部材３３ａが立設され、この取付部材３３ａの上面にＹ方向から見てＴ字状になるように、取付部材３３ｂが設けられている。この取付部材３３ａ、３３ｂを介して、最左の主駆動機構２６Ｌのスライダ２２にはテーブル５より上方でＸ方向に延びる左方補助枠３０の一方端が取り付けられ、左方補助駆動機構２７Ｌのスライダ２２には、左方補助枠３０の他方端が同様に取り付けられている。このように、最左の主駆動機構２６Ｌと左方補助駆動機構２７Ｌとを連結するようにテーブル５より上方で左方補助枠３０が設けられている。それにより、左方補助枠３０は、その両端部を最左の主駆動機構２６Ｌと左方補助駆動機構２７Ｌに支持されて駆動される。
また、左方補助枠３０は、縫製枠１０の左方のはみ出し部２８Ｌの一部である後辺１４の左方最端部１４Ｌに係合されている。
この係合は、後辺１４の左方最端部１４Ｌの上部から上方に突出した一対の支軸に回転可能に軸着された一対の係合ローラ３２が立設され、左方補助枠３０の下面側に、左方補助枠３０の長さ方向に沿って設けられている縦壁３０ａの一つのＸ方向の途中部にそれを挟むようになっている。
【００２３】
右方補助駆動機構２７Ｒと右辺１８を挟んで並ぶ最右の主駆動機構２６Ｒのスライダ２２には、最左の主駆動機構２６Ｌのスライダ２２と同様に、スリット２３から上方に突出した取付部材３３ａが立設され、この取付部材３３ａの上面にＹ方向から見てＴ字状になるように、取付部材３３ｂが設けられている。この取付部材３３ａ、３３ｂを介して、最右の主駆動機構２６Ｒのスライダ２２にはテーブル５より上方でＸ方向に延びる右方補助枠３１の一方端が取り付けられている。右方補助枠３１より上方に設けられている右方補助駆動機構２７Ｒのスライダ２２には、スライダ２２の上面にＹ方向から見て逆Ｌ状の吊上部材３４が設けられている。この吊上部材３４を介して、右方補助駆動機構２７Ｒのスライダ２２には右方補助枠３１の他方端が取り付けられている。このように、最右の主駆動機構２６Ｒと右方補助駆動機構２７Ｒとをテーブル５より上方で連結する右方補助枠３１が設けられている。それにより、右方補助枠３１は、その左端部を最右の主駆動機構２６Ｒに支持されて駆動され、右端部を右方補助駆動機構２７Ｒに吊り上げられて駆動される。
また、右方補助枠３１は、左方補助枠３０と同様に、縫製枠１０の右方のはみ出し部２８Ｒの一部である後辺１４の右方最端部１４Ｒに係合されている。
この係合も、左方補助枠３０と同様であり、後辺１４の右方最端部１４Ｒの上部から上方に突出した一対の支軸に回転可能に軸着された一対の係合ローラ３２が立設され、右方補助枠３１の下面側に、右方補助枠３１の長さ方向に沿って設けられている縦壁３１ａの一つのＸ方向の途中部にそれを挟むようになっている。
【００２４】
このように構成されたミシン１の縫製枠駆動装置による作用効果を以下に説明する。
Ｙ方向駆動装置１１である主駆動機構２６及び補助駆動機構２７が縫製データに基づいて同期して駆動されると、主駆動機構２６によって縫製枠１０の後辺１４が駆動され、補助駆動機構２７によって縫製枠１０の後辺１４のはみ出し部２８が左方補助枠３０と右方補助枠３１を介してＹ方向に駆動される。
この後辺１４の左方最端部１４Ｌ及び右方最端部１４ＲのＹ方向の駆動は、左方補助枠３０及び右方補助枠３１の下面側の縦壁３０ａ、３１ａを挟むように係合している一対の係合ローラ３２がＹ方向に駆動することで行われる。
また、Ｘ方向駆動装置１２が縫製データに基づいて駆動されると、縫製枠１０の右辺１８がＸ方向に駆動される。左方補助枠３０及び右方補助枠３１を介した後辺１４の左方最端部１４Ｌ及び右方最端部１４ＲのＸ方向の駆動は、一対の係合ローラ３２が縦壁３０ａ、３１ａを挟んで長さ方向であるＸ方向に摺動係合することで行われる。
これらのＹ方向駆動装置１１及びＸ方向駆動装置１２により、縫製枠１０がＸ方向及びＹ方向に駆動されるので、縫製枠１０に張設されている加工布がテーブル５上を水平移動され、加工布に縫い目が形成されるようになっている。
【００２５】
縫製枠１０が初期の位置であるテーブル５の略中央部に位置している時には、図８に示すように、後辺１４がＹ方向駆動装置１１の長さ方向の略中央部に位置し、右辺１８がＸ方向駆動装置１２の長さ方向の略中央部に位置している。この際、図１１（ａ）に示すように、後辺１４の左方最端部１４Ｌ及び右方最端部１４Ｒの上部に立設された係合ローラ３２は、対応する左方補助枠３０又は右方補助枠３１の長さ方向の略中央部に係合している。
【００２６】
縫製枠１０が後限位置であって、右限位置に来た時には、図９に示すように、後辺１４がＹ方向駆動装置１１の長さ方向の後限位置であって、右辺１８がＸ方向駆動装置１２の長さ方向の右限位置にある。この際、図１１（ｂ）に示すように、後辺１４の左方最端部１４Ｌ及び右方最端部１４Ｒの上部に立設された係合ローラ３２は、対応する左方補助枠３０又は右方補助枠３１の長さ方向の右限位置に係合している。
【００２７】
縫製枠１０が前限位置であって、左限位置に来た時には、図１０に示すように、後辺１４がＹ方向駆動装置１１の長さ方向の前限位置であって、右辺１８がＸ方向駆動装置１２の長さ方向の左限位置にある。この際、図１１（ｃ）に示すように、後辺１４の左方最端部１４Ｌ及び右方最端部１４Ｒの上部に立設された係合ローラ３２は、対応する左方補助枠３０又は右方補助枠３１の長さ方向の左限位置に係合している。
【００２８】
このように、縫製枠１０がどのような位置に駆動されても、常に、後辺１４の左方最端部１４Ｌ及び右方最端部１４Ｒの上部に立設された係合ローラ３２が、左方補助枠３０又は右方補助枠３１に係合しているので、特に、縫製枠１０が左限位置及び右限位置に位置し、縫製枠１０のはみ出し部２８に歪みが発生しやすい状況であっても、歪みを防止できる。
【００２９】
また、補助枠３０、３１を縫製枠１０の後辺１４の左方最端部１４Ｌ及び右方最端部１４Ｒを含むはみ出し部２８Ｌ、２８Ｒに沿うように、左右に分けて必要最小限の部分のみに設けているので、補助枠３０、３１の重量の不必要な増加を押さえ、縫製枠１０のＹ方向駆動装置１１及びＸ方向駆動装置１２に無用な負担をかけない。そのため、縫製枠１０を高速に駆動できる。
【００３０】
さらに、右辺１８を駆動するＸ方向駆動装置１２が縫製枠１０より下方に設けられている場合には、Ｘ方向駆動装置１２に駆動力を伝達するベルト駆動軸８がＹ方向に設けられている。この場合でも、最右の主駆動機構２６Ｒと右辺１８を挟んで並ぶ右方補助駆動機構２７Ｒを縫製枠１０の上方に設けることで、ミシン１のテーブル５を拡張せずに右方補助枠３１を設けることができる。
【００３１】
なお、本発明は前記実施形態の構成に限定されず、例えば以下のように、発明の趣旨から逸脱しない範囲で適宜変更して具体化することもできる。
（１）左辺１７及び右辺１８を挟んで並ぶ補助駆動機構２７と主駆動機構２６のうち、補助駆動機構２７を縫製枠１０より上方に設け、主駆動機構２６を縫製枠１０より下方に設けること。
（２）左方補助枠３０及び右方補助枠３１が縫製枠１０の前辺１５の対応するはみ出し部の一部にそれぞれ係合すること。
（３）右方補助枠３１が縫製枠１０の前辺１５の右方最端部に係合し、左方補助枠３０が縫製枠１０の後辺１４の左方最端部に係合すること。
【００３２】
【発明の効果】
以上詳述したように、請求項１、２、３及び４の発明に係るミシンの縫製枠の前後方向駆動装置によれば、前後駆動装置に無用な負担をかけないので、縫製枠を高速に駆動でき、また、縫製枠のはみ出し部に発生する歪みを防止するという優れた効果を奏する。
【００３３】
また、請求項５の発明に係るミシンの縫製枠の前後方向駆動装置によれば、上記効果に加えて、テーブルを拡張せずに、縫製枠のはみ出し部に発生する歪みを防止することができる。
【図面の簡単な説明】
【図１】本発明を具体化した実施形態のミシンの縫製枠の前後駆動装置を示す平面図である。
【図２】同ミシンの右方補助駆動機構を示す、図１のＩＩ−ＩＩ線断面図である。
【図３】同ミシンの主駆動機構を示す、図１のＩＩＩ−ＩＩＩ線断面図である。
【図４】同ミシンの縫製枠の右方補助枠及び前後駆動装置の後方からの斜視図である。
【図５】図４の主要部を拡大した分解図である。
【図６】同ミシンの縫製枠の左方補助枠及び前後駆動装置の後方からの斜視図である。
【図７】図４の主要部を拡大した分解図である。
【図８】同ミシンの縫製枠が左右方向駆動装置及び前後方向駆動装置の略中央に位置している平面図である。
【図９】同ミシンの縫製枠が左右方向駆動装置の左限位置であって、前後方向駆動装置の後限位置にある平面図である。
【図１０】同ミシンの縫製枠が左右方向駆動装置の右限位置であって、前後方向駆動装置の前限位置にある平面図である。
【図１１】同ミシンの（ａ）は図６のａ−ａ線断面図、（ｂ）は図７のｂ−ｂ線断面図、（ｃ）は図８のｃ−ｃ線断面図である。
【図１２】従来のミシン縫製枠の前後駆動装置を示す平面図である。
【図１３】従来のミシン縫製枠の前後駆動装置を示す平面図である。
【符号の説明】
１ミシン
５テーブル
８、９ベルト駆動軸
１０縫製枠
１１前後方向（Ｙ方向）駆動装置
１２左右方向（Ｘ方向）駆動装置
１４後辺
１４Ｌ左方最端部
１４Ｒ右方最端部
１８右辺
２１Ｘ方向駆動機構
２４、３２係合ローラ
２６主駆動機構
２７補助駆動機構
２８はみ出し部
３０左方補助枠
３１右方補助枠
５４縫製枠
５５左右方向駆動機構
５６前後方向駆動機構[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drive device that drives a sewing frame for stretching a work cloth in the front-rear direction of a sewing machine.
[0002]
[Prior art]
As shown in FIG. 12, the conventional sewing machine is driven in the left-right direction between the left limit position and the right limit position immediately above the table 51 by another left-right direction driving device 55, and is provided in the left-right direction provided immediately above the table 51. A square frame-like sewing frame 54 having a pair of long sides 52 of a rear side 52a and a front side 52b extending in the direction, a pair of short sides 53 of a left side 53a and a right side 53b extending in the front-rear direction, and the sewing frame 54 And a front-rear direction driving device 56 for driving in the front-rear direction.
The front-rear direction driving device 56 is composed of a plurality of main drive mechanisms 57 that can be driven in the front-rear direction and are provided at left and right intervals. This main drive mechanism 57 is provided with a rightmost main drive mechanism 57R on the left side of the right side 53b of the sewing frame 54 at the left limit position, and on the right side of the left side 53a of the sewing frame 54 at the right limit position. A left main drive mechanism 57L is provided. The sewing frame 54 having such a drive mechanism is a protruding portion 58L in which the left end of the front side 52b and the rear side 52a of the sewing frame 54 that has reached the left limit position protrudes to the left from the leftmost main drive mechanism 57L. The right end portions of the front side 52b and the rear side 52a of the sewing frame 54 that have come to the right limit position become a protruding portion 58R that protrudes to the right from the rightmost main drive mechanism 57R. Since the protruding portions 58L and 58R are not directly driven by the main drive mechanism 57, they are easily distorted. If the protruding portions 58L and 58R have a slight length, distortion is not a problem. However, in a large sewing machine in which the protruding portions 58L and 58R have a length exceeding, for example, 1000 mm, the sewing frame 54 is greatly driven in the left-right direction, and in particular, the sewing frame 54 comes to the left limit position or the right limit position. When driven in the front-rear direction, the protrusions 58L, 58R cannot follow the front-rear drive due to the inertial force. As a result, the protruding portions 58L and 58R are distorted, which has a problem of adversely affecting the sewing finish.
[0003]
Therefore, in order to prevent distortion of the protruding portions 58L and 58R, as shown in FIG. 13, it extends along the length direction of the rear side 52a and protrudes from the left and right end portions of the rear side 52a, and the left and right ends of the rear side 52a. 2. Description of the Related Art A sewing machine having a front / rear direction drive frame 60 that engages portions and drives a sewing frame 54 in the front / rear direction is known. The front-rear direction drive frame 60 is driven by a front-rear direction drive mechanism 61 provided below the front-rear direction drive frame 60 so that both end portions 60a of the front-rear direction drive frame 60 are supported (for example, , See Patent Document 1).
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 64-1989
[Problems to be solved by the invention]
However, if the front-rear direction drive frame 60 is provided along the rear side 52a of a large sewing machine that is long on the left and right, a load is applied to the front-rear direction drive mechanism 61, making it difficult to drive the sewing frame 54 at high speed. There's a problem.
[0006]
Further, when the right and left direction driving mechanism 62 is engaged with the right side 53 b and provided below the sewing frame 54, the front and rear direction driving mechanism 61 provided on the right side of the right side 53 b is below the sewing frame 54. It is close to the left-right direction drive mechanism 55. In this case, there is a problem that the table 51 needs to be expanded in the left-right direction and the front-rear direction in order to secure a space for providing the front-rear direction drive mechanism 61 and the left-right direction drive mechanism 62.
[0007]
The first object of the present invention is to solve the above-mentioned problems and to avoid unnecessary strain on the front-rear drive device, so that the sewing frame can be driven at a high speed and the sewing machine that prevents distortion occurring at the protruding portion of the sewing frame can be achieved. It is in providing the front-back direction drive device of a sewing frame.
[0008]
A second object of the present invention is to solve the above-mentioned problems, and to provide a front-rear direction drive device for a sewing frame of a sewing machine that prevents distortion occurring at the protruding portion of the sewing frame without expanding the table.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a sewing machine sewing frame front / rear direction drive device according to the present invention is a square frame that is driven in the left / right direction between the left limit position and the right limit position immediately above the table by the left / right direction drive apparatus. A longitudinal drive device for driving a sewing frame in the front-rear direction, comprising a plurality of main drive mechanisms capable of driving in the front-rear direction provided at left and right intervals, and the right side of the sewing frame at the left limit position A leftmost main drive mechanism is provided on the left side, a leftmost main drive mechanism is provided on the right side of the left side of the sewing frame at the right limit position, and the front side of the sewing frame at the left limit position and The left end of the rear side protrudes to the left from the leftmost main drive mechanism, and the right end of the front side and the rear side of the sewing frame that has reached the right limit position is to the right of the rightmost main drive mechanism. In the front-rear direction driving device that becomes a protruding portion that protrudes in the direction, A direction driving device is provided below the sewing frame, and is located on either the left side of the sewing frame at the left limit position or the right side of the right side of the sewing frame at the right limit position and above the sewing frame. One auxiliary drive mechanism that can be driven in the front-rear direction is provided at a position that intersects with the left-right direction drive device in plan view, and the one auxiliary drive mechanism and the leftmost or rightmost one arranged across the left side or the right side one of the auxiliary frame which extends a main drive mechanism in the lateral direction which connects from the above table provided for, by engaging the one auxiliary frame part of one of the protruding portions, the one protruding portion so as to drive in the longitudinal direction through the one of the auxiliary frame by the previous SL one auxiliary drive mechanism and the leftmost or rightmost one of the main drive mechanism, the leftmost or rightmost one of the main drive mechanism The sewing All the main drive mechanisms other than the leftmost or rightmost main drive mechanism are provided below the sewing frame, and are provided on the left side or the left side of the sewing frame at the left limit position. The other auxiliary drive mechanism that can be driven in the front-rear direction is provided on the other right side of the right side of the sewing frame at the right limit position and below the sewing frame, and the other side arranged with the left side or the right side interposed therebetween. A second auxiliary frame extending in the left-right direction is provided to connect the auxiliary drive mechanism and the other leftmost or rightmost main drive mechanism above the table, and the other auxiliary frame is used as a part of the other protruding portion. By engaging, the other protruding portion is driven in the front-rear direction via the other auxiliary frame by the other auxiliary drive mechanism and the leftmost or rightmost main drive mechanism. It is characterized by.
[0010]
Wherein one of the main drive mechanism of the leftmost or rightmost, whether provided in either from the embroidery frame upper and lower, are not particularly limited, can be exemplified aspects of the following (1) (2).
(1) A mode in which the one main drive mechanism is provided above the sewing frame.
(2) A mode in which the one main drive mechanism is provided below the sewing frame .
[0011]
The length of the protruding portion is not particularly limited, but when it is 1000 mm or more, the effect of preventing the distortion of the protruding portion is more remarkable.
[0012]
There is no particular limitation as to whether the auxiliary frame engages with the protruding part on the front side or the protruding part on the rear side of the sewing frame, but the auxiliary frame is provided with the main drive mechanism and auxiliary drive provided behind the table. In order to connect the mechanism with ease above the table, it is preferable to engage with the rear side portion of the protruding portion of the sewing frame .
The position of the part of the protruding part that engages the auxiliary frame is not particularly limited anywhere in the protruding part, but in order to more effectively prevent distortion of the protruding part of the sewing frame, the left end part of the sewing frame or It is preferably in the range from the extreme end of the right end to the intermediate position of the protruding portion, more preferably in the range from the extreme end to 1/3 position of the protruding portion, most preferably It is at the end.
[0013]
The engagement between the auxiliary frame and the protruding portion of the sewing frame is not particularly limited, but can be exemplified by an engagement roller and an engagement groove, a pair of engagement rollers and a vertical wall. At this time, which of the auxiliary frame and the protruding portion of the sewing frame is provided is not particularly limited.
[0014]
The drive mechanisms of the front-rear direction drive device and the left-right direction drive device are not particularly limited, and examples thereof include a belt drive mechanism, a ball screw drive mechanism, and a linear motor.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
1 to 7 show a front-rear direction driving device 11 for a multi-head sewing machine 1 and a sewing frame 10 according to an embodiment of the present invention. In the embodiment, the numerical values given below are examples and can be changed as appropriate. In the sewing machine, the left-right direction is conventionally referred to as the X direction, and the front-rear direction is referred to as the Y direction.
This sewing machine has a machine frame comprising a column 2 standing on the floor, and a lower frame 3 and an upper frame 4 that are supported between the lower and upper portions of the column 2 and extend in the left-right direction. The table 5 is supported substantially horizontally. A plurality of sewing heads 6 are arranged on the front surface of the upper frame 4 at predetermined intervals in the left-right direction, and a plurality of beds 7 are arranged on the lower frame 3 at a position directly below each sewing head 6 and approximately the same height as the table 5. Are lined up. As is well known, sewing is performed on a work cloth, which will be described later, in cooperation with a needle that is driven to reciprocate up and down by the sewing head 6 and a shuttle that is rotationally driven by the bed 7.
[0016]
A square frame-shaped sewing frame 10 (an embroidery frame in an embroidery sewing machine) having a pair of long sides 13 and short sides 16 over which a work cloth is stretched is provided immediately above the table 5. And the left side 17 and the right side 18 of the front side 15 and the short side 16.
Embroidery frame 10 of the sewing machine 1, the left rightward drive device (hereinafter referred to as X-direction drive unit) 12 by being driven in the left-right direction between the left limit position and the right limit position, the front-rear direction driving device (hereinafter, It is driven in the front-rear direction between the rear limit position and the front limit position.
[0017]
The X-direction drive device 12 includes two X-direction drive mechanisms 21 that are belt drive mechanisms including a slider 22 that can be driven in the X-direction and that is provided at the front and back of each other. The two X-direction drive mechanisms 21 are behind the front side 15 of the sewing frame 10 at the rear limit position and forward of the rear side 14 of the sewing frame 10 at the front limit position. Are arranged side by side below the right side 18. The X-direction drive mechanisms 21 are connected to each other by a belt drive shaft 8 extending in the Y direction from the rear of the table 5 at the right end of the X-direction drive mechanism 21 to transmit drive force.
The slider 22 of the X-direction drive mechanism 21 is provided with a pair of engaging rollers 24 that are rotatably mounted on a pair of support shafts that protrude upward from slits 23 provided on the surface of the table 5. . The engagement roller 24 is engaged on the lower surface side of the right side 18 so as to sandwich it with one of vertical walls (not shown) provided along the length direction of the right side 18.
[0018]
The Y-direction drive device 11 includes four main drive mechanisms 26 that are belt drive mechanisms including a slider 22 that can be driven in the Y-direction and that are spaced apart from each other on the left and right sides, and a belt drive that includes a slider 22 that can also be driven in the Y-direction. The mechanism comprises two auxiliary drive mechanisms 27 provided on both the left side from the left side and the right side from the right side.
The main drive mechanism 26 is provided with a rightmost main drive mechanism 26R on the left side of the right side 18 of the sewing frame 10 at the left limit position, and the leftmost main drive mechanism 26R on the right side of the left side 17 of the sewing frame 10 at the right limit position. The drive mechanism 26L is provided side by side below the rear side 14 of the sewing frame 10 so as to provide the drive mechanism 26L. Accordingly, the left end portions of the front side 15 and the rear side 14 of the sewing frame 10 that have come to the left limit position are protruding portions 28L (the length in the X direction is about 1200 mm) that protrudes to the left from the leftmost main drive mechanism 26L. The right end portions of the front side 15 and the rear side 14 of the sewing frame 10 that have reached the right limit position are protruding portions 28R (the length in the X direction is about 1200 mm) that protrudes to the right from the rightmost main drive mechanism 26R.
[0019]
Of the two auxiliary drive mechanisms 27, the left auxiliary drive mechanism 27 L is provided side by side with the main drive mechanism 26 to the left of the left side 17 of the sewing frame 10 in the left limit position and below the left side 17. The right auxiliary drive mechanism 27R is located on the right side of the sewing frame 10 in the right limit position and above the right side 18, one end is attached to the rear of the table 5, and the other end is attached to the upper frame 4. It is attached and extends in the Y direction. A belt drive shaft 8 is provided below the table 5 of the right auxiliary drive mechanism 27R.
The main drive device 26 and the auxiliary drive mechanism 27 are connected to each other by a belt drive shaft 9 extending in the X direction from the right side of the table 5 at the rearmost end of the main drive mechanism 26 and the auxiliary drive mechanism 27. The driving force is transmitted.
[0020]
Therefore, for the left auxiliary drive mechanism 27L and the leftmost main drive mechanism 26L arranged across the left side 17, both the left auxiliary drive mechanism 27L and the leftmost main drive mechanism 26L are provided below the sewing frame. Regarding the right auxiliary drive mechanism 27R and the rightmost main drive mechanism 26R arranged with the right side 18 in between, the right auxiliary drive mechanism 27R is provided above the sewing frame 10, and the rightmost main drive mechanism 26R is the sewing frame 10. It will be provided below.
[0021]
Similar to the slider 22 of the X-direction drive mechanism 21, the slider 22 of the main drive mechanism 26 has a pair of shafts rotatably mounted on a pair of support shafts that protrude upward from slits 23 provided on the table 5 surface. The engaging roller 24 is erected. The engaging roller 24 is engaged with one of the vertical walls 14 a provided on the lower surface side of the rear side 14 along the length direction of the rear side 14 so as to sandwich it.
[0022]
Further, the slider 22 of the leftmost main drive mechanism 26L arranged across the left auxiliary drive mechanism 27L and the left side 17 is provided with a mounting member 33a projecting upward from the slit 23, and on the upper surface of the mounting member 33a. An attachment member 33b is provided so as to be T-shaped when viewed from the Y direction. One end of a left auxiliary frame 30 extending in the X direction above the table 5 is attached to the slider 22 of the leftmost main drive mechanism 26L via the attachment members 33a and 33b, and the left auxiliary drive mechanism 27L The other end of the left auxiliary frame 30 is similarly attached to the slider 22. Thus, the left auxiliary frame 30 is provided above the table 5 so as to connect the leftmost main drive mechanism 26L and the left auxiliary drive mechanism 27L. As a result, the left auxiliary frame 30 is driven with both ends thereof supported by the leftmost main drive mechanism 26L and the left auxiliary drive mechanism 27L.
The left auxiliary frame 30 is engaged with the leftmost end portion 14L of the rear side 14 which is a part of the left protruding portion 28L of the sewing frame 10.
In this engagement, a pair of engaging rollers 32 that are rotatably mounted on a pair of support shafts that protrude upward from the uppermost portion of the leftmost end portion 14L of the rear side 14 are provided upright. On the lower surface side, a vertical wall 30a provided along the length direction of the left auxiliary frame 30 is sandwiched by one middle portion in the X direction.
[0023]
As with the slider 22 of the leftmost main drive mechanism 26L, the slider 22 of the rightmost main drive mechanism 26R arranged across the right side auxiliary drive mechanism 27R and the right side 18 has an attachment member 33a protruding upward from the slit 23. The mounting member 33b is provided on the upper surface of the mounting member 33a so as to be T-shaped when viewed from the Y direction. One end of a right auxiliary frame 31 extending in the X direction above the table 5 is attached to the slider 22 of the rightmost main drive mechanism 26R via the attachment members 33a and 33b. The slider 22 of the right auxiliary drive mechanism 27R provided above the right auxiliary frame 31 is provided with an inverted L-shaped lifting member 34 on the upper surface of the slider 22 when viewed from the Y direction. The other end of the right auxiliary frame 31 is attached to the slider 22 of the right auxiliary drive mechanism 27R via the lifting member 34. Thus, the right auxiliary frame 31 that connects the rightmost main drive mechanism 26R and the right auxiliary drive mechanism 27R above the table 5 is provided. As a result, the right auxiliary frame 31 is driven with its left end supported by the rightmost main drive mechanism 26R and driven with the right end being lifted by the right auxiliary drive mechanism 27R.
Similarly to the left auxiliary frame 30, the right auxiliary frame 31 is engaged with the rightmost end portion 14 R of the rear side 14 that is a part of the right protruding portion 28 R of the sewing frame 10.
This engagement is also the same as that of the left auxiliary frame 30, and a pair of engagement rollers 32 rotatably mounted on a pair of support shafts protruding upward from the upper part of the rightmost end 14 R of the rear side 14. Is placed on the lower surface side of the right auxiliary frame 31 so as to be sandwiched by one middle portion in the X direction of the vertical wall 31a provided along the length direction of the right auxiliary frame 31. Yes.
[0024]
The effects of the sewing frame drive device of the sewing machine 1 configured as described above will be described below.
When the main drive mechanism 26 and the auxiliary drive mechanism 27 that are the Y-direction drive device 11 are driven synchronously based on the sewing data, the main drive mechanism 26 drives the rear side 14 of the sewing frame 10, and the auxiliary drive mechanism 27. Accordingly, the protruding portion 28 of the rear side 14 of the sewing frame 10 is driven in the Y direction via the left auxiliary frame 30 and the right auxiliary frame 31.
The driving of the leftmost end portion 14L and the rightmost end portion 14R in the rear side 14 in the Y direction is performed so as to sandwich the vertical walls 30a, 31a on the lower surface side of the left auxiliary frame 30 and the right auxiliary frame 31. This is done by driving a pair of mating engagement rollers 32 in the Y direction.
When the X direction driving device 12 is driven based on the sewing data, the right side 18 of the sewing frame 10 is driven in the X direction. When the leftmost end 14L and the rightmost end 14R of the rear side 14 are driven in the X direction via the left auxiliary frame 30 and the right auxiliary frame 31, the pair of engagement rollers 32 are provided with the vertical walls 30a, 31a. It is performed by slidingly engaging in the X direction, which is the length direction, across the line.
Since the sewing frame 10 is driven in the X direction and the Y direction by the Y direction driving device 11 and the X direction driving device 12, the work cloth stretched on the sewing frame 10 is moved horizontally on the table 5, Seams are formed on the work cloth.
[0025]
When the sewing frame 10 is positioned at the approximate center of the table 5 that is the initial position, the rear side 14 is positioned at the approximate center of the Y-direction drive device 11 in the length direction, as shown in FIG. The right side 18 is located at a substantially central portion in the length direction of the X-direction drive device 12. At this time, as shown in FIG. 11A, the engaging roller 32 erected on the uppermost portion of the leftmost end portion 14L and the rightmost end portion 14R of the rear side 14 is moved to the corresponding left auxiliary frame 30. Alternatively, the right auxiliary frame 31 is engaged with a substantially central portion in the length direction.
[0026]
When the sewing frame 10 is in the rear limit position and comes to the right limit position, as shown in FIG. 9, the rear side 14 is the rear limit position in the length direction of the Y-direction drive device 11, and the right side 18 is It is in the right limit position in the length direction of the X direction driving device 12. At this time, as shown in FIG. 11 (b), the engaging roller 32 erected at the upper part of the leftmost end portion 14 L and the rightmost end portion 14 R of the rear side 14 corresponds to the corresponding left auxiliary frame 30. Alternatively, the right auxiliary frame 31 is engaged with the right limit position in the length direction.
[0027]
When the sewing frame 10 is in the front limit position and has come to the left limit position, as shown in FIG. 10, the rear side 14 is the front limit position in the length direction of the Y-direction drive device 11, and the right side 18 is It is in the left limit position in the length direction of the X direction driving device 12. At this time, as shown in FIG. 11 (c), the engaging roller 32 erected on the uppermost portion of the leftmost end portion 14 L and the rightmost end portion 14 R of the rear side 14 corresponds to the corresponding left auxiliary frame 30. Alternatively, the right auxiliary frame 31 is engaged with the left limit position in the length direction.
[0028]
In this way, regardless of the position at which the sewing frame 10 is driven, the engagement roller 32 erected on the uppermost portion of the leftmost end portion 14L and the rightmost end portion 14R of the rear side 14 is always Since the left auxiliary frame 30 or the right auxiliary frame 31 is engaged, particularly, the sewing frame 10 is positioned at the left limit position and the right limit position, and the protruding portion 28 of the sewing frame 10 is likely to be distorted. Even so, distortion can be prevented.
[0029]
Further, the auxiliary frames 30 and 31 are divided into left and right parts so as to extend along the protruding portions 28L and 28R including the leftmost end portion 14L and the rightmost end portion 14R of the rear side 14 of the sewing frame 10. Therefore, an unnecessary increase in the weight of the auxiliary frames 30 and 31 is suppressed, and an unnecessary burden is not imposed on the Y-direction drive device 11 and the X-direction drive device 12 of the sewing frame 10. Therefore, the sewing frame 10 can be driven at high speed.
[0030]
Further, when the X-direction drive device 12 that drives the right side 18 is provided below the sewing frame 10, the belt drive shaft 8 that transmits the driving force to the X-direction drive device 12 is provided in the Y direction. . Even in this case, the right auxiliary drive mechanism 27R arranged on the right side 18 and the rightmost main drive mechanism 26R is provided above the sewing frame 10 so that the table 5 of the sewing machine 1 is not expanded and the right auxiliary frame 31 is expanded. Can be provided.
[0031]
In addition, this invention is not limited to the structure of the said embodiment, For example, as follows, it can also be changed and embodied suitably in the range which does not deviate from the meaning of invention.
(1) Of the auxiliary drive mechanism 27 and the main drive mechanism 26 arranged across the left side 17 and the right side 18, the auxiliary drive mechanism 27 is provided above the sewing frame 10, and the main drive mechanism 26 is provided below the sewing frame 10. .
(2) The left auxiliary frame 30 and the right auxiliary frame 31 are respectively engaged with a part of the protruding portion corresponding to the front side 15 of the sewing frame 10.
(3) The right auxiliary frame 31 engages with the rightmost end of the front side 15 of the sewing frame 10, and the left auxiliary frame 30 engages with the leftmost end of the rear side 14 of the sewing frame 10. thing.
[0032]
【The invention's effect】
As described in detail above, according to the sewing machine sewing frame front / rear direction drive device according to the inventions of claims 1, 2, 3 and 4, since the unnecessary load is not applied to the front / rear drive device, the sewing frame can be moved at high speed. It can be driven and has an excellent effect of preventing distortion generated at the protruding portion of the sewing frame.
[0033]
According to the sewing machine sewing frame longitudinal drive apparatus according to the invention of claim 5, in addition to the above effects, it is possible to prevent distortion generated at the protruding portion of the sewing frame without expanding the table. .
[Brief description of the drawings]
FIG. 1 is a plan view showing a front / rear drive device for a sewing frame of a sewing machine according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, showing a right auxiliary drive mechanism of the sewing machine.
3 is a cross-sectional view taken along line III-III in FIG. 1, showing a main drive mechanism of the sewing machine.
FIG. 4 is a perspective view from the rear of the right auxiliary frame and the front / rear drive device of the sewing frame of the sewing machine.
FIG. 5 is an exploded view of the main part of FIG. 4;
FIG. 6 is a perspective view from the rear of the left auxiliary frame and the front / rear drive device of the sewing frame of the sewing machine.
7 is an exploded view of the main part of FIG.
FIG. 8 is a plan view in which the sewing frame of the sewing machine is located at the approximate center of the left-right direction driving device and the front-rear direction driving device.
FIG. 9 is a plan view in which the sewing frame of the sewing machine is at the left limit position of the left-right direction drive device and at the rear limit position of the front-rear direction drive device.
FIG. 10 is a plan view in which the sewing frame of the sewing machine is at the right limit position of the left-right direction drive device and at the front limit position of the front-rear direction drive device.
11A is a sectional view taken along line aa in FIG. 6, FIG. 11B is a sectional view taken along line bb in FIG. 7, and FIG. 11C is a sectional view taken along line cc in FIG. .
FIG. 12 is a plan view showing a conventional front / rear drive device of a sewing machine sewing frame.
FIG. 13 is a plan view showing a conventional longitudinal drive device of a sewing machine sewing frame.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sewing machine 5 Table 8, 9 Belt drive shaft 10 Sewing frame 11 The front-back direction (Y direction) drive device 12 The left-right direction (X direction) drive device 14 Back side 14L Leftmost end part 14R Rightmost end part 18 Right side 21 X Direction drive mechanism 24, 32 Engagement roller 26 Main drive mechanism 27 Auxiliary drive mechanism 28 Protruding part 30 Left auxiliary frame 31 Right auxiliary frame 54 Sewing frame 55 Left-right direction drive mechanism 56 Front-rear direction drive mechanism

Claims

A front-rear direction driving device that drives a square frame-shaped sewing frame that is driven in the left-right direction between the left limit position and the right limit position directly above the table by the left-right direction drive apparatus,
It consists of a plurality of main drive mechanisms that can be driven in the front-rear direction on the left and right sides, and a rightmost main drive mechanism is provided on the left side of the right side of the sewing frame at the left limit position. Provide the leftmost main drive mechanism to the right of the left side of the coming sewing frame,
Accordingly, the left end of the front and rear sides of the sewing frame that has reached the left limit position is a protruding portion that protrudes to the left from the leftmost main drive mechanism, and the front and rear sides of the sewing frame that have reached the right limit position. In the front-rear direction drive device in which the right end portion of the side is a protruding portion protruding rightward from the rightmost main drive mechanism,
The left-right direction driving device is provided below the sewing frame,
One of the left side of the sewing frame at the left limit position and the right side of the right side of the sewing frame at the right limit position, at a position intersecting with the left and right direction driving device in plan view above the sewing frame. , provided with a front-rear direction can be driven one of the auxiliary drive mechanism, for connecting from above the left side or the sandwiched therebetween and the one auxiliary driving mechanism arranged to the right side leftmost or table and one of the main drive mechanism of the rightmost one of the auxiliary frame which extend in the lateral direction is provided, by engaging the one auxiliary frame part of one of the protruding portions, the one protruding portion and the front SL one auxiliary drive mechanism the leftmost or Drive in the front-rear direction via the one auxiliary frame with the rightmost one main drive mechanism,
The leftmost or rightmost main drive mechanism is provided above or below the sewing frame, and all the main drive mechanisms other than the leftmost or rightmost main drive mechanism are below the sewing frame. Provided in
The other auxiliary drive mechanism that can be driven in the front-rear direction is on the other side to the left of the left side of the sewing frame in the left limit position or on the right side of the right side of the sewing frame in the right limit position and below the sewing frame. And provided with the other auxiliary frame extending in the left-right direction connecting the other auxiliary drive mechanism arranged on the left side or the right side and the other leftmost or rightmost main drive mechanism above the table, By engaging the other auxiliary frame with a part of the other protruding portion, the other protruding portion is moved by the other auxiliary driving mechanism and the leftmost or rightmost main driving mechanism. A sewing machine sewing frame front / rear direction drive device, wherein the sewing frame is driven in the front / rear direction via an auxiliary frame .