1235774 玖、發明說明 【發明所屬之技術領域】 本發明係有關適用於例如針織τ恤、外衣、內衣等的 袖口或袖腋縫接、男性用內褲或短褲等的袖腋縫接等之利 用布邊縫合機之空環縫入方法及裝置。尤其，係有關一種 空環縫入方法以及空環縫入裝置，其將在縫完先行縫製布 料時殘存之空環以吸引管吸引、保持，並藉由該空環吸引 管朝縫製進行方向之相反方向之搖動，將空環向針落部側 拉伸，拉進後續縫製布料之起針端之縫跡中，再以布邊縫 合機加以縫入（通稱倒縫加固縫製），藉此防止起針端部綻開 【先前技術】 就實施上述空環縫入方法之空環縫入裝置之習知構成 而言，如圖11所示，於具有針落部1和縫跡形成用爪部2( 以此針落部1爲基端朝縫製進行方向X突出形成）之針板3 上部設有將縫製布料緊壓於該針板3上面之壓腳4，同時於 針板3之上方右側部設有空環吸引管5 ;該空環吸引管5， 係將被空環切斷裝置（由於係周知，故省略圖示及詳細構造 之說明）所吹回之空環A吸引保持，並隨著下一縫製之開始 ，朝縫製進行方向X之相反方向搖動，而將所吸引保持之 空環A向針落部1側拉伸，並拉進後續縫製布料起針端之 縫跡中；該空環切斷裝置，係將在縫完先行縫製布料時繞 在針板3之爪部2上之空環部分所相連之空環A，吸入並 1235774 加以切斷之後，將該切斷之空環朝著吸入方向之相反方向 吹回去。 又，於壓腳4側端部以與縫製進行方向X正交之左右 方向上位置調整自如之方式安裝有空環壓爪6。如圖12及 圖Π所示，該空環壓爪6具有相對於針板3之針落部1及 爪部2呈縮小相似形狀之針落部6a及爪部6b，形成有：具 傾斜面之空環導引部6c，其使被空環吸引管5向針落部1 、6a拉伸之空環A滑落而移往壓腳4背面側；及導槽6a， 其將被該空環導引部6c滑移往背面側之空環A嵌合保持， 導引該空環A以平行於縫製進行方向X之姿勢，拉進後續 縫製布料起針端之縫跡中。 根據具有以上構造之習知空環縫入裝置，藉由空環抽 吸管5朝縫製進行方向X之相反方向之搖動動作而被拉往 針落部1、6a前方之空環A，係沿空環壓爪6之空環導引部 6c之傾斜面滑落，並如圖13所示，嵌合保持於該空環壓爪 7背面之導槽6d，藉此導槽6d而被引導成與縫製進行方向 X平行之姿勢。結果，如圖14所示，隨著布邊縫合機對後 續縫製布料W開始進行縫製，空環A會在起針端We之縫 跡S中被以大致平行於形成縫跡S之針線ny之方式拉進， 並被縫入成僅被上線鉤線ly壓住之狀態。 【發明內容】 (一）發明所欲解決之技術問題 不過，由於在利用上述習知空環縫入裝置之空環縫入方法 1235774 中，被拉進後續縫製布料W之起針端We之縫跡S中的空 環A僅被上線鉤線ly壓住，故例如在洗濯使用易滑的布料 、紗線所縫製而成之縫製品等情形下有劇烈力量施加於縫 製布料，此時，好不容易才縫入完成之空環A會自縫跡S 跑出，而露出起針端緣We，損及質感，或因空環露出而降 低倒縫加固縫製之原本的綻開防止功能之問題。 本發明係有鑑於上述實際情況而開發出的發明，其目的在 於提供一種可確實將拉進起針端之縫跡中之空環縫入並保 持於縫跡中，俾即使該空環於洗濯時等受到劇烈力量，亦 不致於意外跑出之空環縫入方法，以及可藉簡單的構造改 良來實現此種縫入方法之空環縫入裝置。 (二）解決問題之技術手段 爲了達成上述目的，申請專利範圍第1項之空環縫入 方法，係藉由將在先行縫製布料縫製結束時被吸入並自該 先行縫製布料切斷之空環吸引保持之空環吸引管之朝縫製 進行方向之相反方向的搖動，以將切斷後之空環向針落部 側拉伸，拉進後續縫製布料之起針端之縫跡中，並藉由布 邊縫合機加以縫入者；其特徵在於：使被該空環吸引管拉 進針落部側之空環之至少一部分相對於針落部往後續縫製 布料側端緣之相反側移位，並以形成後續縫製布料之縫跡 的針線將該移位之空環之至少一部分縫住。 根據具有以上特徵之本發明空環縫入方法，縫入空環 之方式，係在先行縫製布料之縫製結束時被吸入、切斷並 藉由空環吸引管之搖動被向針落部側拉伸，再被拉進後續 1235774 縫製布料起針端之縫跡中之空環至少一部分，被形成縫跡 之針線所縫住，故即使如在縫製品之洗濯時等，縫製布料 受到劇烈力量，亦可確實防止縫入縫跡中之空環意外自縫 跡中跑出。因此，不會發生空環露出起針端緣，損及質感 ，或因空環露出而降低倒縫加固縫之原本的綻開防止功能 ，因此，可經常保持良好質感，同時可長時間確保倒縫加 固縫製原本的綻開防止功能。 又，爲了實施上述空環縫入方法，申請專利範圍第2 項之空環縫入裝置，係用來將在先行縫製布料結束時被吸 入並自該先行縫製布料切斷之空環，拉進後續縫製布料起 針端的縫跡中，並藉由布邊縫合機加以縫入者；其特徵在 於，係具備：壓腳，其將縫製布料緊壓於針板；空環吸引 管，其設置於該壓腳上部，用來吸引保持自先行縫製布料 切斷之空環，並且隨著後續縫製布料之縫製開始，朝縫製 進行方向之相反方向搖動，將所吸引之空環向針落部側拉 伸，並拉進後續縫製布料之起針端之縫跡中；及空環壓爪 ，其固定於該壓腳側端部，並形成有：空環導引部，其將 藉由空環吸引管之搖動動作而被向針落部側拉伸之空環移 至壓腳背面側；及導槽，其將藉該空環導引部而移至背面 側之空環嵌合保持，並導引該空環被拉進縫跡中；且在該 空環壓爪背面之拉進用導槽兩側對向之一對空環導面部中 遠離縫製布料側端緣之一側之空環導面部，係相對於最接 近縫製布料側端緣之針落部，往縫製布料側端緣之相反側 移位；且設有用來將被該空環吸引管拉進針落部側之空環 1235774 之至少一部分移往該移位空環導面部側的機構。 根據具有上述特徵之構造之本發明空環縫入裝置，被 空環吸引管向針落部側拉伸之空環經由空環壓爪之導引部 往該壓爪之背面側滑落，並被嵌合保持於拉進用導槽，在 此狀態，在導槽兩側之一對空環導面部中有向遠離縫製布 料側端緣之一側移位之空環導面部，將該空環之至少一部 分移往該移位之空環導面部，並將該空環之至少一部分以 形成縫跡之針線來加以縫住，因此，一如申請專利範圍第1 項之空環縫入方法所述，即便例如於縫製品洗濯時等有劇 烈力量施加於縫製布料，亦可確實防止縫入縫跡中之空環 跑出縫跡，經常維持良好質感，並且確保倒縫加固縫製之 原本的綻開防止功能，另外，就裝置而言，將空環壓爪背 面之拉進用導槽之一導面部加以移位，僅施以如此極簡單 的構造改良，即可維持如上述之良好質感，並且可確實、 容易實現用來確保原本的綻開防止功能的在空環防脫狀態 之空環縫入作用。 本發明之空環縫入裝置中，將空環之至少一部分移往 移位空環導面部側之機構，係下列中之任一種機構：如申 請專利範圍第3項所記載之空環壓入導引裝置，其可沿與 藉由空環吸引管之搖動而被向針落部側拉伸之空環之牽拉 路徑交叉之方向進出後退驅動自如；如申請專利範圍第4 項所記載之由將空環吸引保持並將該空環向針落部側拉伸 之空環吸引管來兼用者；如申請專利範圍第5項所記載之 空氣噴嘴，其設於針板及壓腳之斜右上方位置，用來朝空 1235774 環噴空氣；如申請專利範圍第6項所記載之空環吸引噴嘴 ，其設置於針板及壓腳之斜左上方位置，用來吸引空環； 及如申請專利範圍第7項所記載之活動式空環鉤，其可自 針板及壓腳之斜左上方位置向針落部進出後退驅動移動自 如，用來將空環鉤住並加以拉進。其中，特別是在如申請 專利範圍第3項所記載的，以空環吸引管兼作空環之移位 機構之情形下，不必設置在針板右側部需要大空間之進出 後退驅動移動自如之空環壓入導引裝置，即可降低裝置成 本並將裝置小型化。 【實施方式】 鮫佳實施例之詳細說明 圖1及圖2，係具備用來實施本發明空環縫入方法之空 環縫入裝置之布邊縫合機之槪略立體圖以及空環縫入裝置 主要部分之放大俯視圖。又，在本發明之空環縫入裝置中 ，就與圖11至圖13所示習知空環縫入裝置共通之構造元 件而言，將賦予相同之符號並省略或簡化其說明，而主要 以異於習知裝置之構造爲中心加以說明。 於圖1中，11係布邊縫合機Μ之交叉板，在該交叉板 11之既定位置固定有，具有如圖2所示之針落部1及縫跡 形成用爪部2之針板3，於縫跡形成用爪部2之基端附近之 前側部設有布端切斷用切刀20(於圖面上僅顯示活動式上切 刀部，固定式下切刀部則省略）。又，在針板3上部除了設 有固定著後述空環壓爪6的壓腳4外，又設有布料感測器( 1235774 圖略），其檢測針14(其透過被支撐於縫紉機床部12之針桿 13、針夾13a而可相對於上述針落部1上下驅動往復運動 自如）及針板3上面有無縫製布料，在有縫製布料（暗狀態) 時就允許縫紉機旋轉；並且在針板3之縫製進行方向X之 後方右側配置有空環切斷裝置（由於係周知，故省略圖示）， 並且，於針板3右側部以可圍繞支點旋轉軸15驅動搖動自 如之方式配置有空環吸引管5，並於該空環吸引管5前方配 置有，透過安裝座16裝設於縫紉機床部12之空環壓入導 引裝置17。 如圖3所示，上述空環吸引管5可在下列三個位置圍 繞支點旋轉軸15驅動搖動自如；第1位置，係空環吸引管 5將被空環切斷裝置所切斷後吹回之空環A接收並吸入保 持；第2位置，係空環吸引管5於該空環A之吸入保持狀 態下，後退搖動至上述針板3之縫跡形成用爪部2之近基 端之前側部之布端切斷用切刀20附近位置並待機；及第3 位置，係空環吸引管5隨著空環A之縫入動作開始，自第 2位置進一步朝縫製方向X之相反方向Y後退搖動，將空 環A拉進後續縫製布料W之起針端We之縫跡中。 又，如圖4及圖5所示，以左右位置可調整自如之方 式固定於上述壓腳4側端部之空環壓爪6 ’係具有：以相似 針板3之針落部1及爪部2之形狀之方式縮小而成之針落 部6a和爪部6b ;具有傾斜面之空環導引部6c ’其使被空 環吸引管5向針落部1、6a拉伸之空環A滑落至壓板4之 背面側；及導槽6d，將由於該空環導引部6c而滑落至背面 11 1235774 側之空環A嵌合保持，並導引該空環A被拉進後續縫製布 料W之縫跡S中。在該空環壓爪6背面之拉進用導槽6d兩 側對向之一對空環導面部6e、6f中遠離縫製布料W側端緣 之一側之空環導面部6e，係相對於最接近縫製布料W側端 緣之針落部1、6a，被移往與縫製布料W側端緣相反之左 側。 再者，上述空環壓入導引裝置17，係由固定保持於安 裝座16之氣壓缸18，以及固定連接於該氣壓缸18之活塞 桿18a前端的空環壓入導具19所構成，於空環壓入導具19 前端形成有大致呈V字形之空環鉤部19a。該空環壓入導 引裝置17，係其壓入導具19通常如圖1及圖6之實線所示 後退至針板3及壓腳4之斜右上方位置並待機著，該壓入 導具19與上述空環吸引管5之第2位置到第3位置之搖動 連動，而如圖1之箭號、圖2之假想線及圖7之實線所示 往與空環A之牽拉路徑交叉之斜左下方向Z進出移動，藉 此，前端之空環鉤部19a將被拉進針落部1、6a前方之空 環A—部分往空環壓爪6之移位導面部6e側壓入移位。 其次，參考圖6、圖7之動作狀態變化圖及圖8之時序 圖，說明利用具上述構成之布邊縫合機之空環縫入裝置的 空環縫入方法。 先行縫製布料之縫紉終端通過布料感測器，該感測器 變爲未檢出（亮狀態）的時點，空環切斷裝置開始進行吸入而 將殘存之空環吸入，並且周知之鬆線裝置鬆線，另一方面 ，布邊縫合機Μ在達到事先設定之針腳數之前持續旋轉， 12 1235774 於此期間內形成一定長度之空環。一達到所設定的針腳數 ，布邊縫合機Μ之旋轉即停止，上述空環切斷裝置會吸入 並切斷空環，同時，將該切斷之空環朝空環吸入方向之反 方向吹出，此後不久，待機於圖3之第2位置之空環吸引 管5移動至第1位置，同時，開始吸入，將被空環切斷裝 置吹出之空環Α吸引保持後，空環吸引管5再搖動移至第 2位置待機，同時，壓腳離開針板3上面並上昇。於此狀態 下，藉由將踏板關掉，而完成先行縫製布料之縫製。 其次，在被上述空環吸引管5所吸入保持之空環A藉 由該吸引管5朝第2位置之移動被拉進比針板3之針落部1 還前方之處，在此狀態，將下一後續縫製布料W，以使其 起針端緣We在縫製進行方向X位於與布端緣切斷用切刀 20大致同一線上之方式安裝於針板3上，上述布料感測器 檢側出布料存在（暗狀態）時，壓腳4即下降抵接於針板3上 面，同時，鬆線裝置被關掉而解除鬆線，成爲可開始縫製 之狀態。 於此狀態下，當啓動踏板時，縫紉機Μ即開始旋轉， 將縫製布料W朝縫製進行方向X進給，迄其起針端緣We 到達針板3之針落部1爲止，於此期間內，繞在針板3之 縫跡形成用爪部上之空環A仍然繞在該爪部2上。 進一步朝縫製進行方向進給縫製布料W，其起針端緣 We到達針板3之縫跡形成用爪部2之前端附近位置，而到 達起針端緣We至布端切斷用上切刀20之尺寸爲既定長度 之位置時，縫紉機Μ之旋轉暫時停止一段既定時間，同時 13 1235774 ，上述空環吸引管5自第2位置搖動移動至圖3之第3位 置，而如圖6所示將空環A向針落部1、6a側拉伸，藉此 ’空環A藉空環壓爪6之空環導引部6c而滑落至背面側， 並嵌合保持於背面之拉進用導槽6d。 此後不久，空環壓入導引裝置17作動，如圖7所示， 空環壓入導具19沿斜左下方向進出移動，隨此移動，透過 壓入導具19前端之鉤部19a，將空環A之一部分壓入、移 往形成空環壓爪6背面之導槽6d的一方之移位導面部6e 側，然後，解除空環吸引管5對空環A之吸引保持。 當暫時停止之縫紉機Μ又恢復既定之旋轉，後續縫製 布料W即朝縫製進行方向X進給，開始縫製，於縫製開始 之初期之運針中被壓入布端切斷用切刀20之切斷部的空環 Α與縫製布料W之側端部一起被切刀20切斷，並且該切斷 之空環部分被拉進縫製布料W之起針端之縫跡S中而縫入 ’但此時，由於空環A之一部分被壓入並移位至形成空環 壓爪6背面之導槽6d的一方之移位導面部6e側，故如圖9 所示，被拉進縫製布料W之縫跡S中之空環A之一部分 A1被形成縫跡S之針線ny所縫住。因此，即使例如於縫 製品洗濯時等，施加劇烈力量於縫製布料W，亦確實防止 縫入縫跡S中之空環A跑出縫跡S，經常維持質感良好， 確保倒縫加固縫製原本的綻開防止功能。 再者，在上述空環縫入後之縫合時之針腳數達到既定 値的時點，上述空環壓入導引裝置17復歸移動至圖1之實 線所示斜右上方位置，並且，空環吸引管5回到第2位置 1235774 準備進行下一次的空環縫入。 且，在上述實施例中，已舉例說明以使用圖1、圖6所 示構造之空環壓入導引裝置Π作爲將空環A —部分壓入並 移位至壓爪6背面之導槽6d的一方之移位導面部6e側之 機構，不過，亦可如圖10所示配置成使用偏心凸輪等使支 點旋轉軸15之位置偏移，俾空環吸引管5自第2位置朝第 3位置搖動時之前端移動軌跡較圖2所示之軌跡更靠左，並 以該空環吸引管5兼作將空環A之一部分壓入並移位至移 位導面部6e側之機構。如上所述，在以空環吸引管5兼作 空環A之移位機構的情形下，不必於針板3右側部佔用大 的設置空間來設置空環壓入導引裝置17,而可降低裝置整 體之成本，亦可將裝置小型化。 又，就將空環A之一部分壓入並移位至壓爪6背面之 導槽6a的一方之移位導面部6e側之機構而言，除了上述 各實施例以外，亦可於針板3和壓腳4之斜右上方位置設 置噴空環之噴嘴，將自該噴嘴噴出之空氣對空環A噴，或 者於針板3及壓腳4之斜左上方位置設置空環吸引噴嘴或 進出後退驅動移動自如之活動式空環鉤具，藉由該空環吸 引噴嘴之空環吸引作用或空環鉤具之空環鉤住拉進作用來 將空環A之一部分移位至移位至移位導面部6e側。 再者，上述實施例中，係圖示雙針式布邊縫合機，但 即使適用於1針或3針式布邊縫紉機，亦有與上述相同之 功效。 15 1235774 【圖式簡單說明】 (一）圖式部分 圖1係具備用來實施本發明空環縫入方法之空環縫入 裝置之布邊縫合機之槪略立體圖。 圖2係該空環縫入裝置之主要部分之針板周邊放大俯 視圖。 圖3係顯示該空環縫入裝置之空環吸引管構造及動作 之主要部放大之局部俯視圖。 圖4係顯示該空環縫入裝置中空環壓爪之構造之主要 部放大俯視圖。 圖5係圖4之B-B線截面圖。 圖6係顯示該空環縫入裝置中空環壓入導引裝置之非 作動狀態之主要部放大立體圖。 圖7係顯示該空環縫入裝置中空環壓入導引裝置之作 動狀態之主要部放大立體圖。 圖8係說明該空環縫入裝置之動作時序之時序圖。 圖9係將空環縫入後之縫製品之一部分放大而顯示之 立體圖。 圖11係習知空環縫入裝置之主要部分之針板周邊放大 俯視圖。 圖12係顯示習知空環縫入裝置中空環壓爪之構造之主 要部放大俯視圖。 圖13係圖12之C-C線截面圖。 圖14係放大顯示習知空環縫入裝置之空環縫入後之縫 1235774 製品一部分之立體圖。 (二）元件代表符號 1 針落部 2 縫跡形成用爪部 3 針板 4 壓腳 5 空環吸引管 6 空環壓爪 6a 針落部 6b 爪部 6c 空環導引部 6d 導槽 6e、6f 空環導面部 11 交叉板 12 縫紉機床部 13 針桿 13a 針夾 14 針 15 支點旋轉軸 16 安裝座 17 空環壓入導引裝置 18 氣壓缸 18a 活塞桿 19 壓入導具 17 1235774 19a 空環鉤部 20 布端切斷用切刀 A 空環 ly 上線飽線 M 布邊縫合機 ny 針線 S 縫跡 W 縫製布料 We 起針端緣 X 縫製進行方向 Y 相反方向1235774 发明 Description of the invention [Technical field to which the invention belongs] The present invention relates to use cloths which are suitable for sewing cuffs or armpits of knitted t-shirts, outerwear, underwear, etc., and sleeve armpits of men's underwear or shorts, etc. Method and device for sewing hollow ring of side sewing machine. In particular, the present invention relates to an air-ring sewing method and an air-ring sewing device, which will suck and hold the empty ring that remains when the fabric is sewn first and then sew the fabric. Shake in the opposite direction to stretch the empty ring toward the needle drop side, pull it into the stitch at the needle end of the subsequent sewing fabric, and then stitch it with a cloth edge sewing machine (commonly known as reverse stitching) to prevent The needle-starting end is flared [prior art] As shown in FIG. 11, the conventional configuration of the air-loop sewing device that implements the above-mentioned air-loop sewing method includes a needle drop portion 1 and a seam-forming claw portion 2. The upper part of the needle plate 3 (with the needle drop 1 as the base end protruding in the sewing direction X) is provided with a presser foot 4 for pressing the sewing fabric tightly on the needle plate 3, and at the same time above the right side of the needle plate 3 An empty ring suction tube 5 is provided; the empty ring suction tube 5 will be sucked and held by the empty ring A blown back by the empty ring cutting device (because it is well known, the illustration and detailed structure are omitted), and it At the start of the next sewing, shake in the opposite direction to the sewing progress direction X, and The attracted and held empty ring A is stretched to the side of the needle drop portion 1 and pulled into the stitch at the needle end of the subsequent sewing fabric. The empty ring cutting device is wound around the needle when the first sewing fabric is sewn. The air ring A connected to the air ring portion on the claw portion 2 of the plate 3 is sucked and cut 1235774, and then the cut air ring is blown back in the direction opposite to the suction direction. In addition, an air ring claw 6 is attached to the end portion on the side of the presser foot 4 so that the position can be adjusted in the left-right direction orthogonal to the sewing progress direction X. As shown in FIG. 12 and FIG. Π, the air ring pressing claw 6 has a needle drop portion 6a and a claw portion 6b having a similar shape to the needle drop portion 1 and the claw portion 2 of the needle plate 3, and has an inclined surface. An empty ring guide portion 6c that slides the empty ring A stretched by the empty ring suction tube 5 toward the needle drop portions 1 and 6a and moves to the back side of the presser foot 4; and a guide groove 6a that is to be moved by the empty ring The guide portion 6c is slid to the back side of the hollow ring A to be fitted and held, and the hollow ring A is guided in a posture parallel to the sewing progress direction X, and pulled into the seam at the needle end of the subsequent sewing fabric. According to the conventional air-loop sewing device having the above structure, the air-loop suction pipe 5 is pulled toward the air-loop A in front of the needle drop portions 1, 6a by the swinging action of the air-loop suction tube 5 in the direction opposite to the sewing direction X, which is along the The inclined surface of the air ring guide 6c of the air ring pressure claw 6 slides down, and as shown in FIG. 13, the guide groove 6d held on the back of the air ring pressure claw 7 is fitted, and the guide groove 6d is guided to the guide groove 6d. Sewing direction X parallel posture. As a result, as shown in FIG. 14, as the edge sewing machine starts to sew the subsequent sewing fabric W, the empty ring A will be approximately parallel to the stitch line ny forming the stitch S in the stitch S of the needle starting end We. Pull it in, and sew it into a state where it is held only by the upper thread. [Summary of the Invention] (1) The technical problem to be solved by the invention, however, because in the above-mentioned conventional air-loop sewing method of the air-loop sewing method 1235774, it is pulled into the seam of the needle-starting end We of the subsequent sewing fabric W. The empty ring A in the trace S is only held by the upper thread and the hook thread ly. Therefore, for example, in the case of washing and using a slippery fabric or a sewing product made of yarn, there is a strong force applied to the sewing fabric. The hollow ring A that is easy to sew into will run out of the seam S and expose the needle end edge We, which will damage the texture, or reduce the original bloom prevention function of the reverse stitch reinforcement sewing due to the empty ring being exposed. The present invention is an invention developed in view of the above-mentioned actual situation, and an object thereof is to provide a hollow ring that can be surely sewn into and maintained in the seam of the seam drawn into the needle end, even if the seam is washed. An air loop sewing method that can receive severe force at all times without accidentally running out, and an air loop sewing device that can realize this sewing method by simple structural improvement. (2) Technical means to solve the problem In order to achieve the above-mentioned purpose, the method for sewing the hollow loop of the first patent application scope is the hollow loop that is sucked in at the end of the sewing of the previously sewn fabric and cut from the previously sewn fabric Swing the holding loop of the empty ring in the opposite direction of the sewing progress direction to stretch the cut empty ring toward the needle drop side, pull it into the stitch at the needle end of the subsequent sewing fabric, and use the cloth An edge sewing machine is used for sewing; it is characterized in that at least a part of the air ring pulled into the needle drop part side by the hollow ring suction tube is displaced relative to the needle drop part to the opposite side of the side edge of the subsequent sewing fabric, and At least a part of the displaced loop is sewn with a needle thread forming a stitch of the subsequent sewing fabric. According to the empty loop sewing method of the present invention having the above characteristics, the method of sewing the empty loop is sucked in, cut off at the end of the sewing of the prior sewing fabric, and pulled to the needle drop side by the swing of the empty loop suction tube. Stretched, and then pulled into at least a part of the air loop in the seam of the starting end of the sewing fabric, sewn by the needle thread that formed the seam, so even when washing the sewing product, etc. It can also surely prevent the empty ring sewn into the seam from accidentally running out of the seam. Therefore, it will not occur that the empty ring is exposed to the needle end edge, which will damage the texture, or the original loop prevention function of the reverse stitches will be reduced due to the empty ring exposure. Therefore, the good texture can always be maintained and the reverse stitch can be ensured for a long time. Reinforcement sewing has the function of preventing blooming. In addition, in order to implement the above-mentioned air-loop sewing method, the air-loop sewing device according to item 2 of the scope of patent application is used to draw in the air-loop that is sucked in and cut off from the previously-sewn fabric at the end of the previously-sewn fabric. Those who subsequently sew the stitches at the needle end of the fabric and sew them with a cloth edge stitching machine; characterized in that it is provided with: a presser foot that presses the sewing fabric tightly against the needle plate; and an air ring suction tube that is provided in the The upper part of the presser foot is used to attract and hold the empty ring cut by the previously sewn fabric, and as the subsequent sewing of the fabric is started, it is shaken in the opposite direction of the sewing progress direction to stretch the attracted empty ring toward the needle drop portion side. , And pull into the stitch at the needle-starting end of the subsequent sewing fabric; and an air ring press claw, which is fixed to the end of the presser foot, and is formed with an air ring guide, which will suck the tube through the air ring The hollow ring stretched toward the needle drop part side by the shaking action is moved to the back side of the presser foot; and the guide groove, which is fitted and held by the hollow ring moved to the back side by the hollow ring guide part, and guides The air ring is pulled into the seam; and on the back of the air ring pressing claw One of the pair of empty ring guide portions facing the sides of the pull-in guide groove away from the side edge of the side of the fabric to be sewn is opposite to the needle drop portion closest to the side edge of the fabric to be sewn. The opposite side of the side end edge is displaced; and a mechanism for moving at least a part of the air ring 1235774 drawn by the air ring suction tube into the needle drop side toward the side of the displacement air ring guide portion is provided. According to the air ring sewing device of the present invention having the above-mentioned structure, the air ring drawn by the air ring suction tube toward the needle drop portion side slides through the guide portion of the air ring pressure claw toward the back side of the pressure claw, and is The fitting is maintained in the guide groove for drawing. In this state, one of the pair of empty ring guide portions on both sides of the guide groove has an empty ring guide portion shifted away from one side of the side edge of the sewing fabric, and the empty ring At least a part of it is moved to the displaced hollow ring guide surface, and at least a part of the hollow ring is sewn with a stitch to form a seam. Therefore, it is the same as the hollow ring sewing method of item 1 of the scope of patent application. It is said that even if a strong force is applied to the sewing fabric, such as when washing the sewing product, it can certainly prevent the empty loops sewn into the sewing trace from running out of the sewing trace, often maintain a good texture, and ensure that the original seam of the reverse stitching and reinforcement stitching is developed. Preventive function. In addition, as far as the device is concerned, the guide surface of the drawing groove on the back side of the air ring pressure claw is displaced, and only by such a simple structure improvement, the good texture as described above can be maintained, and Reliable and easy to use To ensure that the original function of preventing blooming in the free space of separation preventing ring sewn into the ring effect. In the hollow ring sewing device of the present invention, the mechanism for moving at least a part of the empty ring to the side of the guide surface of the displaced empty ring is any one of the following mechanisms: the hollow ring press-in described in item 3 of the scope of patent application Guide device, which can drive in and out freely in the direction intersecting with the drawing path of the air ring stretched toward the needle drop part side by the swing of the air ring suction tube; as described in item 4 of the scope of patent application The air ring suction tube which holds and holds the air ring and stretches the air ring toward the needle drop part side is also used; the air nozzle as described in item 5 of the scope of patent application, which is provided at the oblique of the needle plate and the presser foot. The upper right position is used to spray air toward the air 1235774; the empty ring suction nozzle described in item 6 of the scope of patent application is set at the upper left diagonal position of the needle plate and presser foot to attract the empty ring; and as The movable air loop hook described in item 7 of the scope of patent application can be moved in and out of the needle drop part from the upper left oblique position of the needle plate and presser foot, and can be driven and moved freely to hook and pull the air loop. Among them, especially in the case of a displacement mechanism that uses an empty ring suction tube as an empty ring as described in item 3 of the scope of patent application, it is not necessary to be installed on the right side of the needle plate. Pressing the ring into the guide device can reduce the device cost and miniaturize the device. [Embodiment] Detailed description of the best embodiment FIG. 1 and FIG. 2 are schematic perspective views of a selvedge sewing machine provided with an air loop sewing device for implementing the air loop sewing method of the present invention, and an air loop sewing device An enlarged top view of the main part. In addition, in the air-loop sewing device of the present invention, the structural elements common to the conventional air-loop sewing device shown in Figs. 11 to 13 will be given the same reference numerals and their descriptions will be omitted or simplified. The description will focus on the structure different from the conventional device. In FIG. 1, a cross plate of the 11-series cloth edge stitching machine M is fixed at a predetermined position of the cross plate 11 and has a needle plate 3 having a needle drop portion 1 and a seam forming claw portion 2 as shown in FIG. 2. A cloth-end cutting knife 20 is provided on the front side near the base end of the claw-forming claw portion 2 (only the movable upper cutter portion is shown on the drawing, and the fixed lower cutter portion is omitted). In addition to the presser foot 4 to which the below-mentioned air ring pressing claw 6 is fixed, a cloth sensor (1235774 is omitted) is provided on the upper part of the needle plate 3, and the detection needle 14 (which is supported by the sewing machine part through transmission) The needle bar 13 and needle clip 13a of 12 can drive up and down reciprocatingly with respect to the above-mentioned needle drop portion 1) and the needle plate 3 is provided with a seamless fabric, and the sewing machine is allowed to rotate when the fabric is sewn (dark state); An empty ring cutting device is arranged on the right side behind the sewing direction X of the plate 3 (not shown because it is well known), and is arranged on the right side of the needle plate 3 so as to be able to drive and swing freely around the fulcrum rotation axis 15 An air-ring suction pipe 5 is disposed in front of the air-ring suction pipe 5 and an air-ring press-in guide 17 installed in the sewing machine section 12 through the mounting seat 16. As shown in FIG. 3, the above-mentioned air ring suction tube 5 can be driven and shaken freely around the fulcrum rotation axis 15 at the following three positions; in the first position, the air ring suction tube 5 will be cut by the air ring cutting device and blown back. The air ring A receives and sucks and holds; in the second position, the air ring suction tube 5 is in the suction and holding state of the air ring A, and shakes backward to the front side of the proximal end of the claw portion 2 for forming the needle plate 3 above. And the third position, the loop suction pipe 5 starts the sewing operation of the loop A, and further moves from the second position toward the direction X opposite to the sewing direction Y Shake back and pull the ring A into the stitch of the needle end We of the subsequent sewing fabric W. In addition, as shown in FIGS. 4 and 5, the air ring pressing claw 6 ′ fixed to the side end of the presser foot 4 with adjustable left and right positions is provided with a needle drop portion 1 and a claw similar to the needle plate 3. The needle drop portion 6a and the claw portion 6b are reduced by the shape of the portion 2. The hollow ring guide portion 6c with an inclined surface is a hollow ring that draws the suction ring 5 to the needle drop portions 1 and 6a. A slides to the back side of the pressure plate 4; and the guide groove 6d, fits and holds the air ring A that slides down to the back 11 1235774 side due to the air ring guide 6c, and guides the air ring A to be pulled into the subsequent sewing In the seam S of the cloth W. One of the pair of air ring guide portions 6e, 6f opposite to one side of the guide groove 6d for drawing of the air ring pressing claw 6 on the back side of the air ring guide portion 6e away from one side edge of the sewing fabric W side is opposite to The needle drop portions 1, 6a closest to the side edge of the sewing fabric W are moved to the left side opposite to the side edge of the sewing fabric W. In addition, the above-mentioned air ring press-in guide 17 is composed of a pneumatic cylinder 18 fixedly held on the mounting base 16 and an air ring press-in guide 19 fixedly connected to the front end of a piston rod 18 a of the air cylinder 18, A substantially V-shaped hollow ring hook portion 19 a is formed at the front end of the hollow ring press-fit guide 19. The hollow ring press-in guide 17 is such that the press-in guide 19 is normally retracted to the upper right side of the throat plate 3 and the presser foot 4 as shown by the solid lines in FIG. 1 and FIG. 6 and is waiting. The guide 19 is linked with the shaking of the second position to the third position of the above-mentioned air ring suction tube 5, and is drawn to the air ring A as shown by the arrow in FIG. 1, the imaginary line in FIG. 2 and the solid line in FIG. Pull the path in the diagonally lower left direction Z to move in and out. As a result, the front ring hook portion 19a will be pulled into the ring A in front of the needle drop portion 1, 6a—part of the guide ring portion 6e of the air ring pressing claw 6. Push into side to shift. Next, a description will be given of an air-loop sewing method using the air-loop sewing device of the edge-stitch sewing machine having the above-mentioned configuration with reference to the operation state change diagrams of FIGS. 6 and 7 and the timing chart of FIG. 8. When the sewing terminal that sew the fabric first passes the fabric sensor, when the sensor becomes undetected (bright state), the air-loop cutting device starts to inhale and the remaining empty loop is sucked in, and the well-known thread release device Loose thread, on the other hand, the cloth edge stitching machine M continues to rotate before reaching the preset number of stitches, and 12 1235774 forms a certain length of empty ring during this period. As soon as the set number of stitches is reached, the rotation of the cloth edge stitching machine M stops. The above-mentioned air ring cutting device sucks in and cuts the empty ring, and at the same time blows the cut empty ring in the opposite direction of the air ring suction direction. Shortly thereafter, the air ring suction tube 5 waiting at the second position in FIG. 3 moves to the first position, and at the same time, starts suction, and after the air ring A blown out by the air ring cutting device is sucked and held, the air ring suction tube 5 After shaking, it moves to the second position to wait, and at the same time, the presser foot moves away from the upper surface of the throat plate 3 and rises. In this state, the pedal is turned off to complete the sewing of the first-sewn fabric. Next, the air ring A sucked and held by the air ring suction tube 5 is pulled into the front of the needle drop portion 1 of the needle plate 3 by the suction tube 5 moving toward the second position. In this state, The next subsequent sewing fabric W is mounted on the needle plate 3 so that the needle-up end edge We is located on the same line as the cloth edge cutting cutter 20 in the sewing progress direction X. The above-mentioned fabric sensor detects When the side-exited fabric is present (dark state), the presser foot 4 is lowered and abutted against the needle plate 3, and at the same time, the thread release device is turned off to release the thread release, and the sewing can be started. In this state, when the pedal is turned on, the sewing machine M starts to rotate, and feeds the sewing fabric W in the sewing progress direction X until the needle-up end edge We reaches the needle drop portion 1 of the throat plate 3. During this period The air ring A wound on the claw portion for forming the stitch of the needle plate 3 is still wound on the claw portion 2. The sewing fabric W is further fed in the direction of sewing, and the needle-up end edge We reaches the position near the front end of the stitch formation claw portion 2 of the throat plate 3, and reaches the needle-up end edge We to the cloth end cutting upper cutter. When the size of 20 is the position of a predetermined length, the rotation of the sewing machine M is temporarily stopped for a predetermined period of time, and at the same time 13 1235774, the above-mentioned air ring suction pipe 5 is moved from the second position to the third position in FIG. 3, as shown in FIG. 6 The hollow ring A is stretched toward the needle drop portions 1 and 6a, whereby the 'empty ring A is slid down to the back side by the air ring guide 6c of the air ring pressing claw 6, and is fitted and held on the back for the pull-in Guide groove 6d. Shortly thereafter, the air ring press-fit guide 17 is activated. As shown in FIG. 7, the air ring press-fit guide 19 moves in and out in an obliquely lower left direction. With this movement, through the hook portion 19 a at the front end of the press-fit guide 19, A part of the air ring A is pushed in and moved to the side of the displacement guide surface 6e that forms the guide groove 6d on the back of the air ring pressing claw 6, and then the air ring A is sucked and held by the air ring A. When the temporarily stopped sewing machine M resumes the predetermined rotation, the subsequent sewing fabric W feeds in the sewing direction X to start sewing, and is cut by the cloth end cutting cutter 20 in the needle transport at the beginning of sewing. The empty ring A of the part is cut by the cutter 20 together with the side end of the sewing fabric W, and the cut empty ring portion is pulled into the seam S of the needle-up end of the sewing fabric W and sewn into 'But this At this time, since a part of the hollow ring A is pressed in and displaced to the side of the displacement guide surface 6e that forms the guide groove 6d on the back of the hollow ring claw 6, it is pulled into the sewing fabric W as shown in FIG. A part A1 of the hollow ring A in the seam S is sewn by the needle thread ny forming the seam S. Therefore, even if, for example, a strong force is applied to the sewing fabric W when the sewing product is washed, the hollow loop A in the sewing trace S is surely prevented from running out of the sewing trace S, and the texture is often maintained to ensure the original Expansion prevention function. Furthermore, when the number of stitches at the time of sewing when the above-mentioned air loop is sewn reaches a predetermined point, the above-mentioned air loop press-in guide 17 is moved back to the upper right diagonal position shown by the solid line in FIG. 1, and the air loop The suction tube 5 is returned to the second position 1235774 and is ready for the next hollow loop sewing. Moreover, in the above-mentioned embodiment, it has been exemplified that the hollow ring press-in guide Π using the structure shown in FIG. 1 and FIG. 6 is used as a guide groove for partially pressing in and shifting the empty ring A to the back of the pressing claw 6. 6d is a mechanism for shifting the guide surface portion 6e. However, as shown in FIG. 10, the position of the fulcrum rotation shaft 15 may be shifted using an eccentric cam or the like, and the hollow ring suction tube 5 is moved from the second position toward the second position. When the 3 position is shaken, the front end movement trajectory is more to the left than the trajectory shown in FIG. 2, and the empty ring suction pipe 5 also serves as a mechanism for pressing in and displacing a part of the empty ring A to the side of the displacement guide portion 6 e. As described above, in the case where the empty ring suction tube 5 also serves as the displacement mechanism of the empty ring A, it is not necessary to occupy a large installation space on the right side of the needle plate 3 to install the empty ring press-in guide device 17, and the device can be lowered. The overall cost can also miniaturize the device. In addition, as for the mechanism that presses a part of the hollow ring A into and shifts the guide surface 6e side of one of the guide grooves 6a on the back surface of the pressing claw 6, in addition to the above embodiments, the needle plate 3 A nozzle for the air ring is set at the diagonally upper right position with the presser foot 4, and the air sprayed from the nozzle is sprayed on the air ring A, or an empty ring is arranged at the upper left and diagonal positions of the needle plate 3 and the presser foot 4 to attract the nozzle or enter and exit Drive back and move freely movable air ring hooks, and move part of the air ring A to the position of the ring by the air ring suction effect of the air ring suction nozzle or the air ring hook pull-in effect of the air ring hook. The guide surface 6e is shifted. Furthermore, in the above-mentioned embodiment, the two-needle type selvedge sewing machine is illustrated, but even if it is applied to a one-needle or three-needle selvedge sewing machine, it has the same effect as above. 15 1235774 [Brief description of the drawings] (I) Schematic part Fig. 1 is a schematic perspective view of a selvedge sewing machine provided with an air-loop sewing device for implementing the air-loop sewing method of the present invention. Fig. 2 is an enlarged top view of the periphery of the needle plate of the main part of the hollow ring sewing device. Fig. 3 is an enlarged partial plan view showing the main part of the structure and operation of the air ring suction pipe of the air ring sewing device. Fig. 4 is an enlarged plan view showing a main part of the structure of the hollow ring pressing claw of the hollow ring sewing device. Fig. 5 is a sectional view taken along the line B-B in Fig. 4. Fig. 6 is an enlarged perspective view of a main part showing a non-actuated state of the hollow ring press-fit guide of the hollow ring sewing device. Fig. 7 is an enlarged perspective view of a main part showing an operating state of the hollow ring press-fitting guide of the air ring sewing device. FIG. 8 is a timing chart illustrating the operation timing of the air loop sewing device. Fig. 9 is an enlarged perspective view showing a part of the sewn product after the hollow ring is sewn. Fig. 11 is an enlarged top view of the periphery of the needle plate of the main part of the conventional air loop sewing device. Fig. 12 is an enlarged plan view of a main part showing a structure of a hollow ring pressing claw of a conventional hollow ring sewing device. Fig. 13 is a sectional view taken along the line C-C in Fig. 12. Fig. 14 is an enlarged perspective view showing a part of the 1235774 product of the conventional air loop sewing device after the air loop is sewn. (II) Symbols for components 1 Needle drop part 2 Stitch forming claw part 3 Needle plate 4 Presser foot 5 Air ring suction tube 6 Air ring pressure claw 6a Needle drop part 6b Claw part 6c Air ring guide 6d Guide groove 6e 6f Air ring guide surface 11 Cross plate 12 Sewing machine part 13 Needle bar 13a Needle clamp 14 Needle 15 Pivot shaft 16 Mounting seat 17 Air ring press-in guide 18 Pneumatic cylinder 18a Piston rod 19 Press-in guide 17 1235774 19a Air loop hook 20 Cutting end cutter A Air loop ly Upper thread full M Cloth sewing machine ny Needle thread S Stitch W Sewing fabric We Needle end edge X Sewing direction Y Opposite direction
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