201128016 六、發明說明： 【發明所屬之技術領域】 本發明，是關於利用縫紉機在布上形成雙線鎖縫或平 式連鎖縫時，防止線縫從縫合終端側綻開的線縫綻開防止 方法及其裝置。 【先前技術】 習知的線縫綻開防止裝置，已知有是在縫製結束時環 頂器移動至前進位置狀態下使鉤卡合於環狀縫針線至環頂 器的環頂線將該環頂線的卡合部由配置在環頂器後退位置 的承刀切斷，然後，驅動一縫針量縫紉機之後利用鉤捕捉 環頂器所捕捉的環狀縫針線及從環狀縫線至環頂器的環頂 線由上述承刀切斷各線的例子（例如參照專利文獻1 )。 該裝置的動作會使布上形成的線縫終端施有綻開防止處理 的同時殘留環頂線的回絲。另，卡合在鉤的環頂線的卡合 部由配置在環頂器後退位置側的承刀切斷後驅動一縫針量 縫紉機時，配置在比絡線台還上游側的小夾線器會形成作 用狀態，殘留在縫紉機側的環頂線會由U字型線導件及L字 型線導件稍微拉回至線供應源側。 [專利文獻1]日本特開2009-66191號公報（第1-11頁、 第1 -1 4圖） 【發明內容】 [發明欲解決之課題] -5- 201128016 然而’先前的線縫綻開防止裝置中，一縫針量驅動時 ϋ字型線導件及L字型線導件的環頂線拉回量只不過是微細 量’無法使線切斷後從布終端垂下的回絲長度充分縮短。 於是’爲了讓縫製品外觀印象良好，縫製作業員必須用鑷 子等從布上去除回絲，或用剪刀等再度剪掉回絲的端部， 導致作業煩瑣。 因此’本發明的課題，是以提供一種能夠維持裝置全 體小型化的同時能夠充分縮短環頂線的回絲，不需要回絲 處理的線縫綻開防止方法及其裝置爲目的。 [用以解決課題之手段] 本發明爲了達成上述目的，配備有：插通有縫針線可 上下活動的至少1支的針；及夾著該針進退擺動在前進位 置和後退位置之間可插通有環頂線的環頂器，可使布上形 成有雙線鎖縫的縫紉機的布縫製，其特徵爲，具備有：包 括有配置在環頂器後退位置側的承刀和前端部具有線捕捉 用的鉤部能夠利用承刀進退的鉤及可使鉤進退之活動構件 的線切斷器；可出沒在活動構件的路徑上出現時限制鉤進 .退的限制構件；可使鉤的進退路徑在通過環狀縫針線後方 之後改變成沿著環頂器朝向環狀縫針線至環頂器之環頂線 的第1路徑或沿著環頂器通過環狀縫針線的圈內朝向環狀 縫針線至環頂器之環頂線的第2路徑之路徑變更手段；可 在縫製結束時於環頂器進出於前進位置的狀態下控制成使 鉤利用承刀沿著第1路徑前進朝向環狀縫針線至環頂器之 -6- 201128016 環頂線，並且使限制構件出現在活動構件的路徑上，在鉤 沿著第1路徑後退時利用該鉤的鉤部捕捉上述環頂線的同 時利用出現在活動構件路徑上的限制構件使鉤前端停止在 環狀縫針線的後方，鉤停止之後驅動一縫針量縫紉機再度 使環頂器進出於前進位置，退縮限制構件藉此重新啓動活 動構件的動作使環頂線的捕捉部份由承刀切斷，並且使鉤 的進退路徑從第1路徑改變成第2路徑，利用承刀使鉤沿著 第2路徑進出而進入卡合於環頂器所捕捉的環狀縫針線的 同時朝環狀縫針線至環頂器的環頂線進出，利用隨之而來 的後退捕捉上述環狀縫針線和該環狀縫針線至環頂器的環 頂線由承刀進行切斷的控制手段。 另外，本發明是以構成將線切斷器的驅動構件配置在 縫紉機背面的托座，利用固定在該托座的彈簧執行限制構 件的出現，並利用反抗上述彈簧來產生作用的氣缸筒執行 限制構件的退縮爲佳，上述氣缸筒只要構成爲可形成上述 路徑變更手段的一部份，該氣缸筒的動作能夠變更鉤的進 退路徑即可。 [發明效果] 根據本發明時，是將進出的鉤沿著環頂器後退捕捉環 頂線之後才將該鉤從環狀縫針線移開使鉤前端停止在環狀 縫針線的後方’因此鉤的環頂線卡合部就會成爲未切斷直 接位於線縫終端附近的狀態，只要驅動一縫針量縫紉機就 能夠再度使環頂器進出至前進位置。另，進出的鉤首先是 201128016 沿著環頂器後退，因此就能夠確實執行鉤的環頂線捕捉。 再加上，是在驅動一縫針量縫紉機之後才切斷鉤所捕捉的 環頂線，同時將該鉤進入卡合於環頂器所捕捉的環狀縫針 線同時朝環狀縫針線至環頂器的環頂線進出，在該鉤的後 退時利用該鉤捕捉上述環狀縫針線和該環狀縫針線至環頂 器的環頂線由承刀進行切斷，因此能夠維持裝置全體小型 化的同時能夠使不需要的環頂線拉出抑制成最小限度。此 外，因環頂線的拉出量是被抑制成最小程度所以就能夠充 分縮短從布終端垂下的回絲長度，能夠不需要該回絲的處 理。 另外，線切斷器的驅動構件是配置在縫紉機背面的托 座，由固定在該托座的彈簧執行限制構件的出現，同時由 反抗上述彈簧來產生作用的氣缸筒執行限制構件的退縮， 因此就能夠有效利用配置上空出的空間使裝置全體小型化 。再加上，上述氣缸筒是形成爲上述路徑變更手段的一部 份，利用該氣缸筒的動作能夠執行鉤進退路徑的變更，因 此就能夠減少裝置全體的零件數量。 【實施方式】 [發明之最佳實施形態] 以下，是根據圖面對本發明的實施形態進行說明。本 發明所應用的縫紉機，配備有機臂部1A和機床部1B，機床 部1B是前端側具備缸筒床lb。缸筒床lb，具備：可上下前 後四方運動將布朝箭頭符號F方向輸送的送布齒2;可左右 201128016 前後橢圓運動的環頂器3 ;及固定在螺絲孔4 a的挺針板4 ( 參照第2圖）。缸筒床lb上方設有針棒7。針棒7是連結於 機臂部1A內的針棒上下驅動機構（未圖示），左針5及右 針6是安裝在針棒7下端。左右的針5、6的前端部是利用針 棒7上下運動使其間歇性貫通挺針板。環頂器3是由螺絲3 c 固定在環頂軸3a前端的環頂座3b ’環頂軸3a是連動於針棒 7的上下運動朝送布方向F正交方向擺動。即，環頂器3是 在挺針板4下方夾著針5、6前端部進退擺動在前進位置和 後退位置。當左右的針5、6和環頂器3合作行動時，如第7 圖至第14圖所示，是由插通在左右針5、6的縫針線8、9及 插通在環頂器3的環頂線1〇在布W上形成雙線鎖縫S。另， 縫針線8、9及環頂線1 0是經由賦予張力用的夾線器TT連接 於線供應源。此外，如第19圖所示，夾線器TT具有習知的 鬆線裝置TL，由鬆線裝置TL動作使各線8、9、1 0的張力 賦予一起解除。 缸筒床1 b的基部側（右側），是設有由下述構成形成 的線切斷器1 1。線切斷器1 1的承刀1 2，是配置在環頂器3 的後退位置側，由螺絲1 5使其和鉤導件1 3及板簧1 4—起固 定在托座1 6前端部。隔著墊圈1 8固定在機床內蓋1 7的螺絲 19是配置在托座16基端部上形成的長孔16a內，托座16是 由墊圈18支撐成可轉動並且可滑動。另外，插通在托座16 前端部的螺絲20、20是貫通線保持彈簧21的長孔21 a螺入 在固定片22的螺絲孔22a。托座16的基端部是形成有凹部 16b。該凹部16b是抵接有線彈簧23的一端，線彈簧23的另 -9 - 201128016 一端是由螺絲24固定在機床內蓋17。藉此使托座16於機床 內蓋17經常被彈推往固定的卡止片25側。 承刀1 2和鉤導件1 3之間，是配置有可滑動做爲活動刀 的鉤2 6。該鉤2 6腹側前端部具有環頂線用鉤部2 6 a和縫針 線用鉤部26b，鉤26的背側是大致形成爲直線狀。鉤26的 基端部是由螺絲28固定在動作片27。動作片27爲橫向長具 有沿著長向延伸的第1長孔29及第2長孔30，螺絲31、33是 安裝在機床內蓋17。螺絲31所插通的圓狀套環32是配置在 第1長孔29內，螺絲33所插通的圓狀套環34是配置在第2長 孔30。即，動作片27是由套環32、34支撐成可滑動。動作 片27，是連結於由螺絲35支撐在機床內蓋17成可轉動的連 桿構件36，連桿構件36是連結於第1氣缸筒37的活塞桿37a 。第1氣缸筒37是配置縫紉機背面的托座（未圖示），當 第1氣缸筒37的活塞桿37a進退時就會使動作片27驅動。此 外，動作片27是形成有突片27a，托座16是形成有突片27a 卡合用的卡合部16c。另，爲了讓突片27a和卡合部16c能 夠適度卡合最好是將托座16的一部份可滑動地卡合在動作 片27兩側面。 動作片27的第2長孔30是具備有沿著長向成相向的第1 引導面30a及第2引導面3 0b。第1引導面30a是由三方向連 續延伸的凸輪面構成的同時第2引導面3 Ob是由二方向連續 延伸的凸輪面構成，藉此使兩引導面3〇a、30b的間隔在中 途變寬。此外’動作片27的基端部是由螺絲39固定有線精 工彈簧38的一端。線精工彈簧38的另—端是固定在第2氣 -10- 201128016 缸筒4〇的活塞桿40a所固定的長角材41。當第2氣缸筒40的 活塞桿40a進退時’第2長孔30的第1引導面30a或第2引導 面30b是會卡合於螺絲33所支撐的墊圈34。此外，第3氣缸 筒50是和第1氣缸筒37成相向配置。在第1氣缸筒37的活塞 桿3 7 a進出時若第3氣缸筒5 0的活塞桿5 0 a沿著箭頭符號X方 向進出時，是會使第1氣缸筒3 7的活塞桿3 7 a朝箭頭符號Y 方向指定量移動。如此一來鉤26就會被移至中間位置。 另，動作片27是由螺絲43固定有線道導件42，機床內 蓋1 7的端部是固定有U字型導線器44。該線道導件42和環 頂器3之間是固定配置有習知的絡線台45，在U字型導線器 44和夾線器TT之間是配置有小夾線器46。絡線台45具有一 對L字型導線器45a、45a，利用絡線台45出沒的蛤蜊狀凸 輪（未圖示）是在出現時卡合於L字型導線器4 5 a、4 5 a之 間的環頂線1 〇。小夾線器46，具備：由彈簧47壓接的2片 夾線片48、48 ;及作用時使爪49a介於兩夾線片48、48之 間的解除構件49。彈簧47造成的夾線片48、4 8壓接力是比 配置在線供應源側的夾線器TT壓接力還強，當該壓接力作 用在環頂線10時是不會讓環頂線10從夾線器TT拉往環頂器 3側。另，通常是讓爪49a介於小夾線器46的夾線片48、48 之間，使張力不會賦予在夾線片48、48之間的環頂線1 0。 本發明如第5圖所示，是配備有控制手段CPU5 1、 ROM52、RAM53。CPU51所輸出的指令是構成爲透過1/054 適當傳達至各構件的氣缸筒37、40、50，腳踏板55的踩踏 或回踩時產生的訊號是構成爲透過I/O 54進入CPU51。此外 -11 - 201128016 ，縫紉機用馬達56、鬆線缸筒57及壓腳上昇器58也是透過 1/0 54連接於CPU51。另，ROM52是記憶有各構件的基本動 作程式，RAM是53記憶有各構件的動作相關數據。 其次，是一邊參照第6圖的動作時機圖及第7圖至第14 圖的動作步驟圖一邊說明本發明相關的線縫綻開防止裝置 的控制流程。 隨著布W縫製的結束解除腳踏板55的踩踏時，腳踏板 55會回到空擋位置，如第7圖所示，在針5、6位於上死點 ，環頂器3位於前進位置的狀態下縫紉機馬達停止。然後 ，當回踩腳踏板55時，在指定時間T1後第3缸筒50的活塞 桿50a會進出使第1氣缸筒37的活塞桿37a朝箭頭符號X方向 指定量移動。該活塞桿37a的指定量後退移動是會讓連桿 構件36繞著螺絲35旋轉。此時，第2氣缸筒40的活塞桿40a 爲進出著，動作片27是在第2長孔30的第1引導面30a卡合 於螺絲33所支撐之環套34的狀態下移動。此外，隨著動作 片27的進出是會讓托座16—起進出至途中即直到接觸卡止 片25爲止。接著，動作片27前出進使動作片27的突片27a 從托座16的卡合部16c離開。如此一來鉤26就會從承刀12 和線保持彈簧2 1之間進出，鉤26的前端是停止在環狀縫針 線的後方。 從第3氣缸筒50的活塞桿50a進出經過指定時間T2後， 就啓動第1氣缸筒3 7使活塞桿3 7a在指定時間T3期間朝箭頭 符號X方向後退。活塞桿37a的後退是會讓連桿構件36繞著 螺絲35旋轉，如第8圖所示，動作片27的鉤26是進出至最 -12- 201128016 前線位置。兩氣缸筒37、50所造成的動作片27的進出動作 是會使鉤26沿著第15圖中一點虛線所示的第1路徑（a— bl —c— d )即沿著邊通過環頂器3所捕捉的環狀縫針線8L、 9 L的線圈外邊要卡合於環狀縫針線8 L至環頂器3的環頂線 1 0a之路徑形成往動。另，沿著第1路徑的鉤26的往動結束 時，鉤26的背側會接觸環狀縫針線8L、9L’鉤26的鉤部 2 6 a是成爲通過環頂線1 〇 a旁的狀態。另外，此時，線道導 件42是和動作片27—起朝環頂器3進出，使U字型導線器44 和L字型導線器45間的環頂線1 0受到線道導件42處理。藉 此能夠適度維持環頂線1 0的拉緊狀態。 從第1氣缸筒37的活塞桿37a後退經過指定時間T3後， 活塞桿37a是朝箭頭符號γ方向進出，活塞桿37a的前端會 碰到第3氣缸筒50的活塞桿50a以致在途中就停止進出。活 塞桿37a的進出是會讓連桿構件36繞著螺絲35旋轉，使動 作片27後退。此時，活塞桿40a的進出是維持著，鉤26是 沿著第1路徑復動至途中。即，當進出的鉤2 6沿著環頂器3 後退時’夠2 6的環頂線用飾部2 6 a是會捕捉環狀縫針線8 L 至環頂器3之眼孔3e的環頂線l〇a，然後該鉤26是從環頂器 3移開的同時又往後退在途中就停止。如此一來，如第9圖 所示’鉤20的環頂線用鉤部26a就會以捕捉有環頂線狀 態位於環狀縫針線8L、9L的後方（中間位置）。 從鉤2 6中途停止起經過指定時間τ 4後，驅動—縫針量 的縫紉機時，針5、6會經過下死點（參照第1 〇圖）上昇的 同時環頂器3會從後退位置進出。如第^圖所示，環頂器3 -13- 201128016 是在進出時捕捉形成在針5、6後部的新環狀縫針線8LL、 9LL。從縫紉機一縫針量驅動經過指定時間T5後，是使第3 氣缸筒50的活塞桿50a朝箭頭符號Y方向後退。如此一來就 可使第1氣缸筒37的活塞桿37 a進出再度啓動，使動作片27 後退。該動作片27的後退是會使鉤26的鉤部26a將環頂線 10a牽引至承刀12，使該環頂線10a的卡合部份由鉤部26a 和承刀12共同行動切斷。即，鉤26的後退是由第3氣缸筒 50的活桿50a限制。另外，此時，是需先啓動第2氣缸筒40 使活塞桿40a後退，使第2長孔30的第2引導面30b形成爲卡 合在螺絲33所支撐之套環34的狀態。藉此使下一次的鉤26 往動路徑從第1路徑變更成第2路徑。再加上，此時，是需 先使鬆線裝置TL動作一齊解除各線8、9、10的張力賦予。 另’切斷造成殘留在縫紉機側的環頂線1 Ox，如第1 2圖所 示，是由承刀12和線保持彈簧21夾持著。接下來使鉤26後 退時動作片27的突片27a會卡合於托座16的卡合部16c，然 後，動作片27和托座16會一起後退。接著，是需先使解除 構件49的爪49a後退，使彈簧47造成的夾線片48、48壓接 力賦予在環頂線1 0。 從第3氣缸筒50的活塞桿50a後退經過指定時間T6後， 就驅動第1氣缸筒37使活塞桿37a在指定時間T7期間朝箭頭 符號X方向後退。活塞桿37a的後退是會讓連桿構件36繞著 螺絲35旋轉’使動作片27朝挺針板4側進出。此時，第2氣 缸筒40的活塞桿40a是後退，動作片27是於第2長孔30的第 2弓|導面30b卡合在螺絲33所支撐之套環34的狀態下移動。 -14 - 201128016 此外，隨著動作片27的進出，托座16會一起進出至途中即 接觸卡止片25爲止。如此一來鉤26和承刀12就會從待機位 置移動至作用位置。 接下來使動片27進出時，動作片27的突片27a會從托 座16的卡合部16c離開的同時鉤26會從承刀12和線保持彈 簧2 1之間進出，如第1 3圖所示，使殘留在縫紉機側的環頂 線1 Ox的端部解放從線縫S的最終端垂下。該動作片2 7連續 性進出動作會使鉤26沿著第1 5圖中一點虛線所示第2路徑 (a— b2— c— d )即沿著要進入卡合於環頂器3所捕捉之環 狀縫針線8LL、9LL的同時要卡合於環狀縫針線8LL至環頂 器3之眼孔3e的環頂線10 aa的路徑形成往動。另，於沿著 第2路徑的鉤2 6往動結束時，鉤部2 6 a、2 6 a是形成爲通過 環狀縫針線8LL、9LL線圈內的狀態。另外，此時，線道 導件42是和動片27—起朝環頂器3側進出，使U字型導線器 44和L字型導線器45間的環頂線10受線道導件42處理。如 此一來，殘留在縫紉機側的環頂線1 〇 X就會從線縫S稍微往 環頂器3側被拉回，能夠縮短從縫線S終端垂下的垂下量。 然後，啓動第1氣缸筒37使活塞桿37a朝箭頭符號γ方 向進出。活塞桿37的進出會讓連桿構件36繞著螺絲35旋轉 ，使動作片27後退。此時’活塞桿40a的後退是維持著， 鉤2 6是沿著第2路徑復動。該復動使鉤26的環頂線用鉤部 2 63牽引環狀縫針線8!^1_<至環頂器3的環頂線1〇3&，使環頂 線用鉤部2 6 b牽引環頂器3所捕捉的環狀縫針線8 L L、9 L L 。每當要以鉤部2 6 b捕捉環狀縫針線8 L L、9 L L時，鬆線裝 -15- 201128016 置TL是爲啓動著，因此就能夠順暢執行環狀縫針線8LL、 9LL的牽引。另，當鉤部26a、26b到達承刀12時該兩者的 合作行動是會切斷各線8LL、9LL、10aa的卡合部份。該切 斷是會讓最終殘留在縫紉機側的環頂線1 〇z由承刀1 2和線 保持彈簧21夾持，如第14圖所示，使環頂線的回絲lOxxg 留在線縫S最末端。 當鉤26更加後退時動作片27的突片27a會卡合於托座 16的卡合部16c，然後，動作片27和托座16會一起後退。 於活塞桿37a的再度進出時是需先再度啓動鬆線裝置TL的 各線8、9、10張力賦予》然後，經過指定時間T8後就上昇 壓腳上昇器藉此就能夠卸下布，完成本裝置的動作。附帶 說明，當解除腳踏板55的回踩時腳踏板55就會回到空擋位 置。只要鉤26的第1次切斷不會讓殘留在布W側的環頂線 l〇y從線縫S終端的左側環狀縫針線Se脫離，則布的縫製結 束端就不會綻開。另，殘留在線縫S終端的環頂線的回絲 ΙΟχχ即使維持原狀也不會有問題，但變成妨礙時只要拉掉 回線的端部即可。另外，此次，針對殘留在布W側的環頂 線1 〇y及線縫s終端的回絲1 〇Χχ，其從線縫s終端的左側環 狀縫針線Se垂下的垂下量是大致相同無損縫製外觀品質。 本實施形態中，爲了讓進出的鉤26在途中停止，第3 氣缸筒活塞桿50a是追趕第1氣缸筒活塞桿3 7a的同時出現 在該活塞桿37a的進出路徑上，但並不限於此。例如也可 構成爲是使第1氣缸筒的活塞桿3 7 a本身後退之後才使限制 片出現在活塞桿37a的進出路徑上，藉此使進出的鉤26在 -16- 201128016 後退時途中停止。上述構成的具體例是揭示在第16圖及第 17圖。如第16圖所示，固定在第1氣缸筒37圓形板59和固 定在縫紉機背面的托座6 0是利用螺絲6 2、6 2安裝在複數的 圓筒體61、61，可滑動地支撐在托座60之突片60a、60b的 支撐軸63是和第1氣缸筒37的活塞桿37a並排設置。活塞桿 37a和支撐軸63是於錢灣利用動作片64連接著，支撐軸63 是形成爲和活塞桿37a同步進退動。動作片64是透過連桿 65連結於連桿構件36，捲裝在支撐軸63的螺旋彈簧66是位 於托座60的突片60a、60b之間。另，螺旋彈簧66的一端是 卡合於托座的突片60b，另一端是卡合於固定在支撐軸63 的筒狀套環63a。 此外，如第17圖所示，托座60是以螺絲68固定有能夠 旋轉的限制片67。固定在托座60的線精工型彈簧69是對限 制片67施加彈推力，在支撐軸63的最進出時使限制片67接 觸筒狀套環63a的外圍。在支撐軸63和活塞桿37a—起後退 時限制片67是直接接觸支撐軸63，活塞桿3 7 a和支撐軸63 的再進出是由限制片6 7限制在途中。該限制會使鉤2 6中途 停止。另外，第2氣缸筒70是和限制片67的旋轉方向成相 向配置，安裝在線精工彈簧38的長角材41是固定在第2氣 缸筒70。即，第2氣缸筒70是兼爲上述實施形態的第2氣缸 筒40和第3氣缸筒50的一部份，其配置方向是和上述實施 形態的第2氣缸筒4〇相反。當第2氣缸筒70的活塞桿70a進 出時鉤26往動路徑是從第1路徑變成第2路徑的同時限制片 67會從支撐軸63離開，解除對套環63a的限制。如此一來 -17- 201128016 ，活塞桿37a就會和支撐軸63—起進出至當初的位置。 接著，是參照第18圖對構成爲上述另一構成時的控制 流程進行說明。 隨著布W縫製的結束解除腳踏板55的踩踏時，腳踏板 5 5會回到空擋位置，如第7圖所示，在針5、6位於上死點 ，環頂器3位於前進位置的狀態下縫紉機馬達停止。然後 ，當回踩腳踏板55時，在指定時間T1後第1缸筒37會啓動 使活塞桿37a在指定時間T3期間朝箭頭符號X方向後退。活 塞桿37a的後退移動是會透過動作片64傳達至連桿65，使 連桿構件36繞著螺絲35旋轉。當連桿構件36繞著螺絲35旋 轉時，如第8圖所示，動作片27的鉤26是會進出至最前線 位置。第1氣缸筒37造成的動作片27進出動作是會使鉤26 沿著第1 5圖中一點虛線所示的第1路徑（a-> b 1 — c— d )即 沿著邊通過環頂器3所捕捉的環狀縫針線8L、9L的線圈外 邊要卡合於環狀縫針線8L至環頂器3的環頂線l〇a之路徑形 成往動。 此外，在活塞桿37a後退時支撐軸63也會和套環63 a — 起後退’限制片67會因線精工型彈簧69的作用而直接接觸 支撐軸63。另，沿著第1路徑的鉤26的往動結束時，鉤26 的背側會接觸環狀縫針線8L、9L，鉤26的鉤部26a是成爲 通過環頂線10a旁的狀態。附帶說明，鉤26往動結束時， 線道導件42是和動作片27—起朝環頂器3側進出，使U字型 導線器44和L字型導線器45間的環頂線10受到線道導件42 處理。藉此能夠適度維持環頂線1 〇的拉緊狀態。 -18- 201128016 從第1氣缸筒3 7的活塞桿3 7a後退經過指定時間T3後， 活塞桿37a是和支撐軸63—起朝箭頭符號Υ方向進出，當固 定在支撐軸63的套環63 a碰到限制片67時活塞桿37a的前端 會停止。活塞桿37a的進出是會讓連桿構件36繞著螺絲35 旋轉，使動作片2 7後退。此時，首先鉤2 6是沿著第1路徑 復動至途中。即，當進出的鉤26沿著環頂器3後退時，鉤 26的環頂線用鉤部26a是會捕捉環狀縫針線8L至環頂器3的 環頂線1 〇a，然後，該鉤26是從環頂器3移開的同時又往後 退在途中就停止。如此一來，如第9圖所示，鉤2 6的環頂 線用鉤部26a就會以捕捉有環頂線l〇a狀態停止在環狀縫針 線8L、9L的後方（中間位置）。 從鉤26中途停止起經過指定時間T4後，驅動一縫針量 的縫紉機時，針5、6會經過下死點（參照第1 0圖）上昇的 同時環頂器3會從後退位置進出。如第1 1圖所示，環頂器3 是在前進時捕捉形成在針5、6後部的新環狀縫針線8LL' 9 LL。從縫紉機一縫針量驅動經過指定時間T5後，是使第2 氣缸筒70的活塞桿70a前進。如此一來就可使限制片67從 支撐軸67離開的同時使第丨氣缸筒37的活塞桿37a進出再度 啓動’使動作片27後退。該動作片27的後退是會使鉤26的 鉤部2 6 a將環頂線1 〇 a牽引至承刀i 2，使該環頂線1 0 a的卡 合部份由鉤部26a和承刀12共同行動切斷。此外，在第2氣 缸筒70的活塞桿70a前進時線精工彈簧38會透過長角材 形成移動’因此會形成爲第2長孔30的第2引導面3 Ob卡合 在螺絲3 3所支撐之套環3 4的狀態。藉此使下一次的鉤2 6往 19- 201128016 動路徑從第1路徑變更成第2路徑。再加上，此時，是需先 使鬆線裝置TL動作一齊解除各線8、9、10的張力賦予。另 ，切斷造成殘留在縫紉機側的環頂線1 Οχ，如第1 2圖所示 ，是由承刀12和線保持彈簧21夾持著。接下來當鉤26後退 時動作片27的突片27a會卡合於托座16的卡合部16c，然後 ，動作片27和托座16會一起後退。接著，是需先使解除構 件49的爪49a後退，使彈簧47造成的夾線片48、48壓接力 賦予在環頂線1 〇。 從第2氣缸筒7 0的活塞桿7 0 a後退經過指定時間T 6後， 就啓動第1氣缸筒3 7使活塞桿3 7a在指定時間T7期間朝箭頭 符號X方向後退。活塞桿37a的後退是會讓連桿構件36繞著 螺絲35旋轉，使動作片27朝挺針板4側進出。此時，第2氣 缸筒70的活塞桿70a是進出，動作片27是於第2長孔30的第 2弓|導面3 Ob卡合在螺絲3 3所支撐之套環3 4的狀態下移動。 此外，隨著動作片27的進出，托座16會一起進出至途中即 接觸卡止片25爲止。如此一來鉤26和承刀12就會從待機位 置移動至作用位置。 接下來使動片27進出時，動作片27的突片27 a會從托 座16的卡合部16c離開的同時鉤26會從承刀12和線保持彈 簧2 1之間進出，如第1 3圖所示，使殘留在縫紉機側的環頂 線1 Ox的端部解放從線縫S的最終端垂下。該動作片27連續 性進出動作會使鉤26沿著第15圖中一點虛線所示第2路徑 (a— b2— c— d )即沿著要進入卡合於環頂器3所捕捉之環 狀縫針線8LL、9LL的同時要卡合於環狀縫針線8LL至環頂 -20- 201128016 器3的環頂線1 〇aa的路徑形成往動。另，於沿著第2路徑的 鉤2 6往動結束時’鉤部2 6 a、2 6b是形成爲通過環狀縫針線 8LL、9LL線圈內的狀態。另外，此時，線道導件42是和 動片2 7 —起朝環頂器3側進出，使U字型導線器44和L字型 導線器45間的環頂線1〇受到線道導件42處理。如此一來， 殘留在縫紉機側的環頂線1 0 X就會從線縫S稍微往環頂器3 側被拉回，能夠縮短從縫線S終端垂下的垂下量。 然後，啓動第1氣缸筒3 7使活塞桿3 7 a朝箭頭符號Y方 向進出。活塞桿37的進出會讓連桿構件36繞著螺絲35旋轉 ’使動作片27後退。此時，活塞桿70a的進出是維持著， 鉤26是沿著第2路徑復動。該復動使鉤26的環頂線用鉤部 26a牽引環狀縫針線8LL至環頂器3的環頂線10aa，使環頂 線用鉤部26b牽引環頂器3所捕捉的環狀縫針線8LL、9 LL 。每當要以鉤部26b捕捉環狀縫針線8LL、9LL時，鬆線裝 置TL是爲啓動著，因此就能夠順暢執行環狀縫針線8LL、 9LL的牽引。另，當鉤部26a、26b到達承刀12時該兩者的 合作行動是會切斷各線8LL、9LL、10aa的卡合部份。該切 斷是會讓最終殘留在縫紉機側的環頂線1 0z由承刀1 2和線 保持彈簧2 1夾持，如第1 4圖所示，使環頂線的回絲1 〇xx停 留在線縫S最末端。 當鉤26更加後退時動作片27的突片27a會卡合於托座 16的卡合部16c，動作片27和托座16會一起後退。於活塞 桿3 7a的再度進出時是需先再度啓動鬆線裝置TL的各線8、 9、1 〇張力賦予。然後，經過指定時間T8後上昇壓腳上昇 -21 - 201128016 器藉此就能夠卸下布，完成本裝置的動作。構成爲上述另 —構成時，是能夠削減氣缸筒的數量，實現裝置全體的小 型化。此外’還能夠省去上述實施形態所執行的「啓動第 3氣缸筒50使鉤26進出至途中」的事前步驟。即，若是構 成爲該另一構成時就能夠消除上述實施形態相關控制流程 中的指定時間T2，因此能夠縮短裝置全體的動作時間。 【圖式簡單說明】 第1圖爲表示本發明相關線縫綻開防止裝置的周邊構 成槪要透視圖。 第2圖爲說明本發明相關線縫綻開防止裝置的全體平 面圖。 第3圖爲表示該裝置要部的零件展開圖。 第4圖爲縫紉機所使用的環頂線槪略穿線圖。 第5圖爲表示本發明相關線縫綻開防止裝置控制部份 的方塊圖。 第6圖爲說明該裝置基本動作的時機流程圖。 第7圖爲表示本發明相關線縫綻開防止裝置動作步驟 槪略透視圖。 第8圖爲表示該裝置的動作步驟槪略透視圖。 第9圖爲表示該裝置的動作步驟槪略透視圖。 第10圖爲表示該裝置的動作步驟槪略透視圖。 第11圖爲表示該裝置的動作步驟槪略透視圖。 第12圖爲表示該裝置的動作步驟槪略透視圖。 -22- 201128016 第13圖爲表示該裝置的動作步驟槪略透視圖。 第14圖爲表示該裝置的動作步驟槪略透視圖。 第1 5圖爲表示鉤26的動作軌跡槪略說明圖。 第1 6圖爲表示本發明相關線縫錠開防止裝置的驅動部 份另一構成要部平面圖。 第17圖爲說明該另一構成要部的槪略側面圖。 第1 8圖爲說明搭載有該另一構成時的線縫綻開防止裝 置基本動作的時機流程圖。 第1 9圖爲搭載有本發明相關線縫綻開防止裝置的縫紉 機外觀透視圖。 【主要元件符號說明】 3 :環頂器 5、6 :縫針 8、9 :縫針線 8 L、9 L :環狀縫針線 8 L L、9 L L :新環狀縫針線 1 0 :環頂線 1 1 :線切斷器 1 2 :承刀 26 :鉤 26a、 26b:鉤部 27 :動作片 2 9 :第1長孔 201128016 30 :第2長孔 30a :第1引導面 30b :第2引導面 3 3 :螺絲 34 :套環 40、70:第2氣缸筒 50 :第3氣缸筒 67 :限制片 69 :線精工型彈簧 -24BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing a seam from being detached from a side of a sewing end when a double-line lock seam or a flat interlocking seam is formed on a cloth by a sewing machine, and Its device. [Prior Art] A conventional seam preventing device is known in which a loop is attached to an endless loop of a loop stitch to a ring top when the looper is moved to a forward position at the end of sewing. The engaging portion of the top line is cut by a receiving knife disposed at the retracted position of the ring top device, and then, after driving a sewing machine, the loop stitch thread captured by the hook catching ring topper and the ring stitching to the ring top are captured. An example in which the ring top line of the device is cut by the above-mentioned blade (for example, refer to Patent Document 1). The action of the device causes the seam end formed on the cloth to be subjected to the blooming prevention process while leaving the loop of the loop top line. In addition, when the engaging portion of the loop top line of the hook is cut by the receiving knife disposed on the retracting position side of the ring top, and the sewing machine is driven by the sewing machine, the small gripper disposed on the upstream side of the stitching table will In the active state, the top line remaining on the sewing machine side is slightly pulled back to the line supply side by the U-shaped wire guide and the L-shaped wire guide. [Patent Document 1] Japanese Laid-Open Patent Publication No. 2009-66191 (pages 1-11, 1-4) [Explanation] [Problems to be solved by the invention] -5- 201128016 However, 'previous seam prevention In the device, when the amount of the needle is driven, the amount of the loop line of the U-shaped wire guide and the L-shaped wire guide is only a small amount, and the length of the yarn that can be dropped from the cloth end after the wire is cut is sufficiently shortened. Therefore, in order to make the appearance of the sewn product sound good, the sewing worker must remove the yarn from the cloth with a tweezers or the like, or cut off the end portion of the yarn again with scissors or the like, resulting in troublesome work. Therefore, the object of the present invention is to provide a wire seam blooming prevention method and an apparatus which can sufficiently reduce the loop of the ring top line while maintaining the overall size of the apparatus, and which does not require the yarn returning process. [Means for Solving the Problem] In order to achieve the above object, the present invention is provided with: at least one needle inserted into a needle thread to be movable up and down; and a swing between the forward position and the backward position by inserting the needle forward and backward. The loop top device having the loop top line can be used for sewing a cloth of a sewing machine having a double-line lock stitch formed on the cloth, and is characterized in that: the cutter includes a cutter disposed at a side of the retracted position of the ring top and a front end portion The hook for the wire catching can utilize the hook for advancing and retracting the knife and the wire cutter for moving the hook to retreat; the restricting member for restricting the hooking and retracting when appearing on the path of the movable member; The advancing and retreating path is changed to a first path along the looper toward the annular needle thread to the ring top line of the ring top after the end of the loop stitch or along the looper through the loop stitch. a path changing means for the second path of the loop thread to the ring top line of the ring top device; at the end of the sewing, the looper can be controlled to move the hook toward the first path in the state of the forward position Loop stitch to the top of the ring -6- 201128016 The top line of the ring, and the restricting member is present on the path of the movable member, and the hook portion of the hook is used to capture the ring top line while the hook is retracted along the first path while utilizing the path of the moving member The restricting member stops the front end of the hook at the rear of the loop stitch, and after driving the hook to stop the sewing machine, the sewing machine re-enters the looper into the forward position, and the withdrawal restricting member thereby restarts the movable member to capture the loop line The part is cut by the cutter, and the advance and retreat path of the hook is changed from the first path to the second path, and the hook is used to enter and exit the hook along the second path to enter the annular stitch thread caught by the ring top. At the same time, the annular needle thread is moved in and out to the ring top line of the ring top device, and the annular stitch thread and the loop stitch line of the loop stitcher are caught by the cutter with the subsequent retreat. Control means. Further, the present invention is a bracket that constitutes a drive member for arranging a wire cutter on the back surface of the sewing machine, and the occurrence of the restriction member is performed by a spring fixed to the bracket, and the cylinder cylinder that acts against the spring is used to perform the restriction. Preferably, the cylinder barrel is configured to be a part of the path changing means, and the operation of the cylinder barrel can change the advance and retreat path of the hook. [Effect of the Invention] According to the present invention, the hook is moved away from the loop stitch line after the hook of the entrance and exit hooks retracts the top line of the loop, so that the hook front end stops behind the loop stitch line. The loop top line engaging portion is in a state of being uncut directly in the vicinity of the seam terminal, and the looper can be re-introduced to the forward position by driving the sewing machine. In addition, the hook that comes in and out is first 201128016 retreating along the ring top, so it is possible to perform the loop top line capture of the hook. In addition, after driving a sewing machine, the hook top thread is cut off, and the hook is inserted into the loop stitch caught by the ring top while the loop stitch is looped to the top of the ring. The ring line of the device enters and exits, and when the hook is retracted, the hook stitch is caught by the hook and the loop stitch line of the loop stitch to the ring top is cut by the blade, so that the entire device can be miniaturized. At the same time, it is possible to suppress the unnecessary loop top line pull-out to a minimum. Further, since the amount of pull-out of the loop top wire is suppressed to a minimum, the length of the yarn which is suspended from the cloth end can be sufficiently shortened, and the process of the yarn return can be eliminated. Further, the driving member of the wire cutter is a bracket disposed on the back surface of the sewing machine, and the occurrence of the restricting member is performed by a spring fixed to the bracket, and the restricting member is retracted by the cylinder barrel that acts against the spring. It is possible to effectively utilize the space vacated on the configuration to miniaturize the entire apparatus. Further, the cylinder barrel is formed as a part of the path changing means, and the change of the hook advance/retraction path can be performed by the operation of the cylinder barrel, so that the number of components of the entire apparatus can be reduced. [Embodiment] BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. The sewing machine to which the present invention is applied is provided with an organic arm portion 1A and a machine tool portion 1B, and the machine tool portion 1B is provided with a cylinder bed lb at the front end side. The cylinder bed lb has: a feed tooth 2 which can transport the cloth in the direction of the arrow symbol F up and down, and a ring top 3 which can move around the front and rear of the 201128016 ellipse; and a needle plate 4 fixed to the screw hole 4 a (Refer to Figure 2). A needle bar 7 is provided above the cylinder bed lb. The needle bar 7 is a needle bar vertical drive mechanism (not shown) that is coupled to the arm portion 1A, and the left needle 5 and the right needle 6 are attached to the lower end of the needle bar 7. The distal end portions of the left and right needles 5, 6 are moved up and down by the needle bar 7 to intermittently penetrate the needle plate. The ring top 3 is a ring top seat 3b which is fixed to the front end of the ring top shaft 3a by a screw 3c. The ring top shaft 3a is oscillated in the orthogonal direction of the feed direction F in conjunction with the vertical movement of the needle bar 7. That is, the ring top device 3 is moved forward and backward with the distal end portions of the needles 5, 6 under the needle plate 4 in the forward position and the retracted position. When the left and right needles 5, 6 and the ring-topper 3 cooperate, as shown in Figs. 7 to 14, the needle needles 8, 9 inserted in the left and right needles 5, 6 and the needle looper are inserted. The top ring line 1 of 3 forms a double-line lock stitch S on the cloth W. Further, the needle threads 8, 9 and the ring top line 10 are connected to the line supply source via a tensioner TT for imparting tension. Further, as shown in Fig. 19, the tensioner TT has a conventional loosening device TL, and the tension of the wires 8, 9, and 10 is released by the action of the loosening device TL. The base side (right side) of the cylinder bed 1 b is provided with a wire cutter 1 1 formed as follows. The receiving blade 1 2 of the wire cutter 1 1 is disposed on the side of the retreat position of the ring top device 3, and is fixed to the front end of the bracket 16 by the screw 15 and the hook guide 13 and the leaf spring 14 unit. The screw 19 fixed to the machine tool inner cover 17 via the washer 18 is disposed in the long hole 16a formed at the base end portion of the bracket 16, and the bracket 16 is rotatably and slidably supported by the washer 18. Further, the screws 20 and 20 that are inserted into the front end portion of the bracket 16 are screw holes 22a into which the long holes 21a of the thread holding springs 21 are screwed. The base end portion of the bracket 16 is formed with a recess 16b. The recessed portion 16b is an end that abuts against the wire spring 23, and the other end of the wire spring 23, -9 - 201128016, is fixed to the machine tool inner cover 17 by a screw 24. Thereby, the bracket 16 is often pushed toward the fixed locking piece 25 side of the machine tool inner cover 17. Between the blade 1 2 and the hook guide 13 is a hook 26 that is slidable as a movable knife. The hook-side front end portion of the hook 26 has a loop top hook portion 26a and a needle thread hook portion 26b, and the back side of the hook 26 is formed substantially in a straight line shape. The base end portion of the hook 26 is fixed to the action piece 27 by a screw 28. The operation piece 27 has a first long hole 29 and a second long hole 30 extending in the longitudinal direction in the lateral direction, and the screws 31 and 33 are attached to the machine tool inner cover 17. The circular collar 32 through which the screw 31 is inserted is disposed in the first elongated hole 29, and the circular collar 34 through which the screw 33 is inserted is disposed in the second elongated hole 30. That is, the action piece 27 is slidably supported by the collars 32, 34. The operation piece 27 is coupled to a link member 36 that is rotatably supported by the machine tool inner cover 17 by a screw 35, and the link member 36 is a piston rod 37a that is coupled to the first cylinder barrel 37. The first cylinder barrel 37 is a bracket (not shown) on the back surface of the sewing machine, and the operating piece 27 is driven when the piston rod 37a of the first cylinder barrel 37 advances and retracts. Further, the operation piece 27 is formed with a projecting piece 27a, and the bracket 16 is an engaging portion 16c for forming a protruding piece 27a for engagement. Further, in order to allow the tab 27a and the engaging portion 16c to be properly engaged, it is preferable to slidably engage a portion of the bracket 16 on both sides of the action piece 27. The second long hole 30 of the operation piece 27 is provided with a first guide surface 30a and a second guide surface 30b that face each other in the longitudinal direction. The first guide surface 30a is constituted by a cam surface that continuously extends in three directions, and the second guide surface 3 Ob is constituted by a cam surface that continuously extends in two directions, whereby the interval between the two guide surfaces 3〇a and 30b is changed in the middle. width. Further, at the proximal end portion of the action piece 27, one end of the wire precision spring 38 is fixed by a screw 39. The other end of the wire precision spring 38 is a long angle member 41 fixed to the piston rod 40a of the second gas -10-201128016 cylinder. When the piston rod 40a of the second cylinder tube 40 advances and retracts, the first guide surface 30a or the second guide surface 30b of the second long hole 30 is engaged with the washer 34 supported by the screw 33. Further, the third cylinder barrel 50 is disposed to face the first cylinder barrel 37. When the piston rod 3 7 a of the first cylinder barrel 37 enters and exits, if the piston rod 50 a of the third cylinder barrel 50 enters and exits in the direction of the arrow X, the piston rod 37 of the first cylinder barrel 37 is made. a moves by the specified amount in the Y direction of the arrow symbol. As a result, the hook 26 will be moved to the middle position. Further, in the operation piece 27, the wire guide 42 is fixed by a screw 43, and the end portion of the machine tool cover 17 is fixed with a U-shaped wire guide 44. A conventional cable station 45 is fixedly disposed between the lane guide 42 and the roofer 3. A small tensioner 46 is disposed between the U-shaped wire guide 44 and the tensioner TT. The cable table 45 has a pair of L-shaped wire guides 45a, 45a, and a cam-shaped cam (not shown) that is used by the cable table 45 is engaged with the L-shaped wire guides 4 5 a, 4 5 a when present. The top line between the rings is 1 〇. The small wire gripper 46 is provided with two pieces of tensioning pieces 48, 48 which are pressed by the spring 47, and a releasing member 49 which acts to cause the claws 49a to be interposed between the two clamping pieces 48, 48. The crimping force of the clamping piece 48, 48 caused by the spring 47 is stronger than the crimping force of the tensioner TT disposed on the line supply source side, and when the crimping force acts on the ring top line 10, the ring top line 10 is not allowed to be The wire gripper TT is pulled to the side of the ring top 3. Alternatively, the pawl 49a is typically interposed between the grippers 48, 48 of the small gripper 46 such that tension does not impart to the loop top line 10 between the grippers 48, 48. As shown in Fig. 5, the present invention is provided with control means CPU 5 1 , ROM 52, and RAM 53. The command output from the CPU 51 is configured to be appropriately transmitted to the cylinder barrels 37, 40, and 50 of the respective members through 1/054, and the signal generated when the foot pedal 55 is stepped on or stepped back is configured to enter the CPU 51 through the I/O 54. Further, -11 - 201128016, the sewing machine motor 56, the loose tube cylinder 57, and the presser foot riser 58 are also connected to the CPU 51 through the 1/0 54. Further, the ROM 52 is a basic operation program in which various components are stored, and the RAM 53 stores motion-related data of each component. Next, the control flow of the seam spur prevention device according to the present invention will be described with reference to the operation timing chart of Fig. 6 and the operation step diagrams of Figs. 7 to 14 . When the stepping of the footrest 55 is released by the end of the sewing of the cloth W, the footrest 55 will return to the neutral position, as shown in Fig. 7, where the needles 5, 6 are at the top dead center, and the ring top 3 is in the forward position. The sewing machine motor stops in the state. Then, when the foot pedal 55 is stepped on, the piston rod 50a of the third cylinder 50 is moved in and out after the designated time T1, and the piston rod 37a of the first cylinder barrel 37 is moved by a predetermined amount in the direction of the arrow X. The specified amount of retraction movement of the piston rod 37a causes the link member 36 to rotate about the screw 35. At this time, the piston rod 40a of the second cylinder tube 40 is moved in and out, and the operation piece 27 is moved in a state where the first guide surface 30a of the second elongated hole 30 is engaged with the collar 34 supported by the screw 33. Further, as the action piece 27 enters and exits, the holder 16 is allowed to enter and exit until the contact with the locking piece 25. Next, the operation piece 27 is moved forward and the protrusion 27a of the operation piece 27 is separated from the engagement portion 16c of the holder 16. As a result, the hook 26 comes in and out between the carrier 12 and the wire holding spring 2 1 , and the front end of the hook 26 stops behind the loop stitch. After the predetermined time T2 has elapsed from the piston rod 50a of the third cylinder barrel 50, the first cylinder barrel 3 is started to retract the piston rod 37a in the direction of the arrow X in the predetermined time period T3. The retraction of the piston rod 37a causes the link member 36 to rotate about the screw 35. As shown in Fig. 8, the hook 26 of the action piece 27 is moved in and out to the front position of the most -12-201128016. The movement of the action piece 27 caused by the two cylinder barrels 37, 50 causes the hook 26 to pass along the first path (a - bl - c - d ) shown by a dotted line in Fig. 15 The outer edges of the loop stitches 8L, 9 L captured by the device 3 are engaged with the loop stitch 8L to the loop top line 10a of the ring top 3 to form a forward movement. Further, when the forward movement of the hook 26 along the first path ends, the back side of the hook 26 contacts the annular needle thread 8L, 9L. The hook portion 26a of the hook 26 is formed by the ring top line 1 〇a. status. In addition, at this time, the track guide 42 is moved in and out toward the ring top 3 together with the action piece 27, so that the ring top line 10 between the U-shaped wire guide 44 and the L-shaped wire guide 45 is subjected to the line guide. 42 processing. Therefore, the tension state of the top line 10 can be moderately maintained. When the piston rod 37a of the first cylinder barrel 37 is retracted for a predetermined time T3, the piston rod 37a enters and exits in the direction of the arrow γ, and the front end of the piston rod 37a hits the piston rod 50a of the third cylinder barrel 50 so as to stop on the way. In and out. The entry and exit of the piston rod 37a causes the link member 36 to rotate about the screw 35 to retract the movable piece 27. At this time, the entry and exit of the piston rod 40a is maintained, and the hook 26 is re-entered along the first path to the middle. That is, when the incoming and outgoing hooks 26 are retracted along the ring-up device 3, the ring-shaped top wire fitting portion 6 6 a is a ring that catches the annular needle thread 8 L to the eyelet 3e of the ring-top device 3. The top line l〇a, then the hook 26 is removed from the ring top 3 and is stopped while retreating on the way. As a result, as shown in Fig. 9, the hook-and-loop portion 26a of the hook 20 is positioned behind the annular stitches 8L and 9L (intermediate position) in a state in which the loop top line is captured. When the sewing machine with the sewing amount is driven after the specified time τ 4 has elapsed from the stop of the hook 26, the needles 5 and 6 will rise through the bottom dead center (see the first drawing), and the ring top 3 will enter and exit from the retracted position. . As shown in Fig. 4, the ring topper 3-13-201128016 captures the new annular stitch wires 8LL, 9LL formed at the rear of the needles 5, 6 when entering and exiting. After the predetermined time T5 has elapsed after the sewing machine has been driven by the needle amount, the piston rod 50a of the third cylinder barrel 50 is retracted in the direction of the arrow Y. As a result, the piston rod 37a of the first cylinder barrel 37 can be reactivated and the action piece 27 can be retracted. The retraction of the action piece 27 causes the hook portion 26a of the hook 26 to pull the ring top line 10a to the receiving blade 12, so that the engaging portion of the ring top line 10a is cut by the hook portion 26a and the receiving blade 12. That is, the retreat of the hook 26 is restricted by the live lever 50a of the third cylinder barrel 50. In this case, the second cylinder tube 40 is first started to retract the piston rod 40a, and the second guide surface 30b of the second long hole 30 is formed in a state of being engaged with the collar 34 supported by the screw 33. Thereby, the next hook 26 forward path is changed from the first path to the second path. Further, at this time, it is necessary to first release the tension device TL to release the tension of each of the wires 8, 9, and 10. Further, the ring top line 1 Ox which is caused to remain on the sewing machine side is cut by the receiving blade 12 and the wire holding spring 21 as shown in Fig. 2 . Next, when the hook 26 is retracted, the tab 27a of the action piece 27 is engaged with the engaging portion 16c of the bracket 16, and then the action piece 27 and the bracket 16 are retracted together. Next, it is necessary to first retract the claws 49a of the releasing member 49, and to apply the crimping force of the tensioning pieces 48, 48 by the spring 47 to the ring top line 10. When the piston rod 50a of the third cylinder barrel 50 has moved backward by the predetermined time T6, the first cylinder barrel 37 is driven to retract the piston rod 37a in the direction of the arrow X in the predetermined time period T7. The retraction of the piston rod 37a causes the link member 36 to rotate about the screw 35 to move the action piece 27 toward the needle plate 4 side. At this time, the piston rod 40a of the second cylinder tube 40 is retracted, and the operation piece 27 is moved in a state where the second bow|guide surface 30b of the second elongated hole 30 is engaged with the collar 34 supported by the screw 33. -14 - 201128016 In addition, as the action piece 27 enters and exits, the holder 16 will come in and out to contact the locking piece 25 on the way. As a result, the hook 26 and the carrier 12 are moved from the standby position to the active position. Next, when the movable piece 27 is moved in and out, the protruding piece 27a of the operating piece 27 is separated from the engaging portion 16c of the bracket 16, and the hook 26 enters and exits between the receiving blade 12 and the wire holding spring 2 1 as in the first 3 As shown in the figure, the end portion of the ring top line 1 Ox remaining on the sewing machine side is liberated from the end of the seam S. The continuous movement of the action piece 27 causes the hook 26 to be captured along the second path (a-b2-c-d) indicated by a dotted line in Fig. 5, that is, along the to-be-engaged ringer 3. The loop stitches 8LL and 9LL are engaged with each other at the same time as the loop stitch line 8LL to the loop top line 10aa of the eyelet 3e of the ringer 3, and the path is formed to move forward. Further, when the hook 26 along the second path is moved, the hook portions 2 6 a and 2 6 a are formed in a state in which they pass through the loop stitches 8LL and 9LL. In addition, at this time, the track guide 42 is moved in and out toward the side of the ring top 3 together with the movable piece 27, so that the top line 10 between the U-shaped wire guide 44 and the L-shaped wire guide 45 is guided by the line guide. 42 processing. As a result, the ring top line 1 〇 X remaining on the sewing machine side is slightly pulled back from the seam S toward the end frame 3 side, and the amount of drooping from the end of the stitch S can be shortened. Then, the first cylinder barrel 37 is actuated to move the piston rod 37a in the direction of the arrow symbol γ. The entry and exit of the piston rod 37 causes the link member 36 to rotate about the screw 35 to retract the action piece 27. At this time, the retreat of the piston rod 40a is maintained, and the hook 26 is retracted along the second path. The double action causes the loop top line of the hook 26 to pull the loop stitch 8!^1_< to the loop top line 1〇3& of the ring top 3 with the hook portion 2 63, so that the loop top line is pulled by the hook portion 26 6 b The loop stitches 8 LL, 9 LL captured by the dome 3 are used. Whenever the loop stitches 8 L L, 9 L L are to be caught by the hooks 26b, the loose thread -15-201128016 is set to be activated, so that the pulling of the loop stitches 8LL, 9LL can be smoothly performed. Further, when the hook portions 26a, 26b reach the receiving blade 12, the cooperative action of the two members cuts off the engaging portions of the respective lines 8LL, 9LL, and 10aa. This cutting is to cause the ring top line 1 〇z which is finally left on the sewing machine side to be held by the receiving blade 1 2 and the wire holding spring 21, as shown in Fig. 14, so that the loop wire lOxxg of the ring top line is left in the seam S The end. When the hook 26 is further retracted, the tab 27a of the action piece 27 is engaged with the engaging portion 16c of the bracket 16, and then the action piece 27 and the bracket 16 are retracted together. When the piston rod 37a is re-entered, it is necessary to first restart the tension lines TL to apply the tension of each line 8, 9, and 10. Then, after a predetermined time T8, the booster foot riser can be lifted to remove the cloth. The action of the device. Incidentally, the footrest 55 is returned to the neutral position when the stepping of the footrest 55 is released. As long as the first cutting of the hook 26 does not cause the loop top line l〇y remaining on the cloth W side to be separated from the left loop stitch Se of the end of the seam S, the sewn end of the cloth does not bloom. Further, the yarn returning of the loop top line remaining in the wire slot S terminal is not problematic even if it is maintained as it is, but it is only necessary to pull off the end portion of the loop when it is hindered. Further, this time, the amount of drooping from the loop line 1 〇y remaining on the cloth W side and the loop 1 终端 at the end of the seam s is substantially the same from the left loop stitch Se of the end of the seam s. Non-destructive sewing appearance quality. In the present embodiment, in order to stop the in-and-out hook 26 from being stopped in the middle, the third cylinder-cylinder piston rod 50a appears on the entry and exit path of the piston rod 37a while catching the first cylinder-cylinder piston rod 37a, but is not limited thereto. . For example, the restricting piece may be caused to appear on the path of the piston rod 37a when the piston rod 37a of the first cylinder barrel is retracted, thereby stopping the entry and exit of the hook 26 on the way back from -16 to 201128016. . Specific examples of the above configuration are disclosed in Figs. 16 and 17. As shown in Fig. 16, the circular plate 59 fixed to the first cylinder barrel 37 and the bracket 60 fixed to the back surface of the sewing machine are slidably attached to the plurality of cylindrical bodies 61, 61 by screws 6 2, 6 2 The support shaft 63 supported by the tabs 60a, 60b of the bracket 60 is disposed side by side with the piston rod 37a of the first cylinder barrel 37. The piston rod 37a and the support shaft 63 are connected by the action piece 64 in Qianwan, and the support shaft 63 is formed to be retracted in synchronization with the piston rod 37a. The action piece 64 is coupled to the link member 36 via the link 65, and the coil spring 66 wound around the support shaft 63 is positioned between the tabs 60a, 60b of the bracket 60. Further, one end of the coil spring 66 is a tab 60b that is engaged with the bracket, and the other end is engaged with a cylindrical collar 63a fixed to the support shaft 63. Further, as shown in Fig. 17, the bracket 60 is fixed with a rotatable restricting piece 67 by a screw 68. The wire precision spring 69 fixed to the bracket 60 applies a spring force to the restriction piece 67, and causes the restriction piece 67 to contact the outer periphery of the cylindrical collar 63a when the support shaft 63 is most advanced. When the support shaft 63 and the piston rod 37a are retracted, the restricting piece 67 is in direct contact with the support shaft 63, and the re-entry of the piston rod 37a and the support shaft 63 is restricted by the restriction piece 67. This restriction will cause the hook 26 to stop halfway. Further, the second cylinder barrel 70 is disposed to face the rotation direction of the regulating piece 67, and the long angle member 41 to which the in-line precision spring 38 is attached is fixed to the second cylinder tube 70. In other words, the second cylinder barrel 70 is also a part of the second cylinder barrel 40 and the third cylinder barrel 50 of the above-described embodiment, and the arrangement direction thereof is opposite to that of the second cylinder barrel 4'' of the above-described embodiment. When the piston rod 70a of the second cylinder tube 70 comes in and out, the forward path of the hook 26 changes from the first path to the second path, and the restriction piece 67 is separated from the support shaft 63, and the restriction on the collar 63a is released. As a result, -17-201128016, the piston rod 37a will enter and exit with the support shaft 63 to the original position. Next, a control flow when the other configuration is configured will be described with reference to Fig. 18. When the stepping of the footrest 55 is released by the end of the sewing of the cloth W, the footrest 55 will return to the neutral position, as shown in Fig. 7, where the needles 5, 6 are at the top dead center, and the ring top 3 is located at the forward position. The sewing machine motor stops in the position. Then, when the foot pedal 55 is pressed back, the first cylinder 37 is started after the designated time T1, and the piston rod 37a is retracted toward the arrow symbol X during the designated time T3. The reverse movement of the piston rod 37a is transmitted to the link 65 through the action piece 64, and the link member 36 is rotated about the screw 35. When the link member 36 is rotated about the screw 35, as shown in Fig. 8, the hook 26 of the action piece 27 is moved in and out to the foremost line position. The action of the operation piece 27 by the first cylinder barrel 37 is such that the hook 26 is along the first path (a-> b 1 - c - d ) indicated by a dotted line in Fig. 5 The outer edge of the loop of the loop stitches 8L, 9L captured by the topper 3 is engaged with the path of the loop stitch 8L to the loop top line l〇a of the ring top 3 to form a forward movement. Further, when the piston rod 37a is retracted, the support shaft 63 also comes back to the collar 63a. The restriction piece 67 directly contacts the support shaft 63 by the action of the wire-type spring 69. Further, when the forward movement of the hook 26 along the first path is completed, the back side of the hook 26 contacts the annular needle thread 8L, 9L, and the hook portion 26a of the hook 26 passes through the loop top line 10a. Incidentally, when the hook 26 is moved forward, the lane guide 42 enters and exits the side of the dome 3 with the action piece 27, so that the ring top line 10 between the U-shaped wire guide 44 and the L-shaped wire guide 45 is provided. It is processed by the lane guide 42. Thereby, the tension state of the top line 1 〇 can be maintained moderately. -18- 201128016 After the specified time T3 has elapsed from the piston rod 3 7a of the first cylinder barrel 37, the piston rod 37a enters and exits with the support shaft 63 in the direction of the arrow symbol , when the collar 63 is fixed to the support shaft 63. When the stopper piece 67 is hit, the front end of the piston rod 37a is stopped. The entry and exit of the piston rod 37a causes the link member 36 to rotate about the screw 35 to retract the action piece 27. At this time, first, the hook 26 is re-shifted along the first path to the middle. That is, when the incoming and outgoing hooks 26 retreat along the ring-up device 3, the loop-top line hook portion 26a of the hook 26 catches the loop stitch line 8L to the ring top line 1 〇a of the ring-topper 3, and then The hook 26 is removed from the ring top 3 and is stopped while being retracted on the way. As a result, as shown in Fig. 9, the hook-and-loop portion 26a of the hook 26 stops at the rear (intermediate position) of the loop stitches 8L, 9L in a state in which the loop top line 10a is caught. When the sewing machine that drives the sewing amount is elapsed after the predetermined time T4 has elapsed from the stop of the hook 26, the needles 5 and 6 will rise through the bottom dead center (see Fig. 10), and the dome 3 will enter and exit from the retracted position. As shown in Fig. 1, the ringer 3 captures a new loop stitch 8LL' 9 LL formed at the rear of the needles 5, 6 during advancement. After the predetermined time T5 has elapsed after the sewing machine has been driven by the needle amount, the piston rod 70a of the second cylinder tube 70 is advanced. As a result, the restriction piece 67 can be moved away from the support shaft 67, and the piston rod 37a of the second cylinder barrel 37 can be moved in and out again to cause the operation piece 27 to retreat. The retraction of the action piece 27 is such that the hook portion 6 6 a of the hook 26 pulls the ring top line 1 〇 a to the carrier i 2 so that the engaging portion of the ring top line 10 a is composed of the hook portion 26a and the bearing Knife 12 is cut off together. Further, when the piston rod 70a of the second cylinder barrel 70 advances, the line precision spring 38 moves through the long angle member. Therefore, the second guide surface 3 Ob formed as the second elongated hole 30 is engaged with the screw 3 3 The state of the collar 3 4 . Thereby, the next hook 26 is changed from the first path to the second path to the 19-201128016 moving path. Further, at this time, it is necessary to first release the tension device TL to release the tension of each of the wires 8, 9, and 10. Further, the ring top line 1 造成 remaining on the side of the sewing machine is cut, and as shown in Fig. 2, it is held by the blade 12 and the wire holding spring 21. Next, when the hook 26 is retracted, the tab 27a of the action piece 27 is engaged with the engaging portion 16c of the bracket 16, and then the action piece 27 and the bracket 16 are retracted together. Next, it is necessary to first retract the claw 49a of the releasing member 49 so that the crimping force of the tension pieces 48, 48 by the spring 47 is given to the top line 1 of the ring. When the piston rod 70a of the second cylinder barrel 70 is retracted for a predetermined time T6, the first cylinder barrel 37 is started to retract the piston rod 37a in the direction of the arrow X in the predetermined time period T7. The retraction of the piston rod 37a causes the link member 36 to rotate about the screw 35 to move the action piece 27 toward the needle plate 4 side. At this time, the piston rod 70a of the second cylinder tube 70 is moved in and out, and the operation piece 27 is in a state where the second bow|guide surface 3 Ob of the second elongated hole 30 is engaged with the collar 34 supported by the screw 3 3 . mobile. Further, as the action piece 27 enters and exits, the holder 16 comes in and out to contact the locking piece 25 on the way. As a result, the hook 26 and the carrier 12 are moved from the standby position to the active position. Next, when the movable piece 27 is moved in and out, the protruding piece 27a of the action piece 27 will be separated from the engaging portion 16c of the bracket 16, and the hook 26 will enter and exit between the receiving blade 12 and the wire holding spring 21, as in the first. As shown in Fig. 3, the end portion of the ring top line 1 Ox remaining on the sewing machine side is liberated from the end of the seam S. The continuous movement of the action piece 27 causes the hook 26 to follow the second path (a-b2-c-d) shown by the dotted line in Fig. 15, that is, the ring captured to be engaged with the ring-top device 3. The stitches 8LL and 9LL are simultaneously engaged with the loop stitch 8LL to the loop top -20-201128016. The path of the loop top line 1 〇aa of the device 3 is formed to move forward. Further, when the hooks 26 along the second path are moved, the hook portions 2 6 a and 2 6b are formed in a state in which they pass through the loop stitches 8LL and 9LL. In addition, at this time, the lane guide 42 enters and exits the side of the dome 3 together with the movable piece 27, and the ring top line 1 between the U-shaped wire guide 44 and the L-shaped wire guide 45 is subjected to the lane. The guide 42 is processed. As a result, the loop top line 10X remaining on the sewing machine side is slightly pulled back from the seam S toward the end framer 3 side, and the amount of drooping from the end of the stitch S can be shortened. Then, the first cylinder barrel 37 is activated to move the piston rod 37a in the direction of the arrow Y. The entry and exit of the piston rod 37 causes the link member 36 to rotate about the screw 35 to retract the action piece 27. At this time, the entry and exit of the piston rod 70a is maintained, and the hook 26 is moved back along the second path. The double action causes the loop top line of the hook 26 to pull the loop stitch 8LL to the loop top line 10aa of the ring top 3 by the hook portion 26a, so that the loop top thread hooks the hook stitch 26b to catch the loop stitch caught by the ring top 3. Line 8LL, 9 LL. When the loop stitch 8LL, 9LL is to be caught by the hook portion 26b, the loose thread device TL is activated, so that the pulling of the loop stitch 8LL, 9LL can be smoothly performed. Further, when the hook portions 26a, 26b reach the receiving blade 12, the cooperative action of the two members cuts off the engaging portions of the respective lines 8LL, 9LL, and 10aa. This cutting is to cause the ring top line 10z, which is finally left on the side of the sewing machine, to be held by the receiving blade 1 2 and the wire holding spring 2 1 as shown in Fig. 4, so that the return wire 1 〇 xx of the ring top line stays The end of the seam S is the end. When the hook 26 is further retracted, the tab 27a of the action piece 27 is engaged with the engaging portion 16c of the bracket 16, and the action piece 27 and the bracket 16 are retracted together. When the piston rod 3 7a is re-entered, it is necessary to first activate the tension of each of the wires 8, 9, and 1 of the loosening device TL. Then, after the specified time T8, the booster foot is raised -21 - 201128016, whereby the cloth can be removed and the operation of the device is completed. In the case of the above-described other configuration, the number of cylinder cylinders can be reduced, and the entire apparatus can be downsized. Further, it is possible to omit the prior steps of "starting the third cylinder tube 50 to move the hook 26 in and out" executed in the above embodiment. In other words, when the other configuration is constructed, the designated time T2 in the control flow of the above-described embodiment can be eliminated, so that the operation time of the entire apparatus can be shortened. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing the periphery of a seam preventing device for a slit according to the present invention. Fig. 2 is a plan view showing the entire seam preventing device of the present invention. Fig. 3 is a developed view showing the parts of the main part of the apparatus. Figure 4 is a schematic diagram of the top thread of the ring used in the sewing machine. Fig. 5 is a block diagram showing a control portion of the seam preventing device of the present invention. Figure 6 is a flow chart showing the timing of the basic operation of the device. Fig. 7 is a schematic perspective view showing the operation steps of the seam preventing device of the present invention. Figure 8 is a schematic perspective view showing the operation steps of the device. Figure 9 is a schematic perspective view showing the operation steps of the device. Figure 10 is a schematic perspective view showing the operation steps of the device. Figure 11 is a schematic perspective view showing the operation steps of the device. Figure 12 is a schematic perspective view showing the operation steps of the device. -22- 201128016 Figure 13 is a schematic perspective view showing the operation steps of the device. Figure 14 is a schematic perspective view showing the operation steps of the device. Fig. 15 is a schematic explanatory view showing the operation trajectory of the hook 26. Fig. 16 is a plan view showing another essential part of the driving portion of the wire stitching preventing device according to the present invention. Fig. 17 is a schematic side view showing the other essential part. Fig. 18 is a timing chart for explaining the basic operation of the seam preventing device when the other configuration is mounted. Fig. 19 is a perspective view showing the appearance of a sewing machine equipped with the seam preventing preventing device of the present invention. [Description of main component symbols] 3: Ring top 5, 6: Needle 8, 9: Needle thread 8 L, 9 L : Annular stitch thread 8 LL, 9 LL: New loop stitch 1 0 : Ring top line 1 1 : Wire cutter 1 2 : Under blade 26 : Hooks 26 a and 26 b : Hook portion 27 : Action piece 2 9 : First long hole 201128016 30 : Second long hole 30 a : First guide surface 30 b : Second guide surface 3 3 : Screw 34 : Collar 40 , 70 : 2nd cylinder barrel 50 : 3rd cylinder barrel 67 : Restriction piece 69 : Wire precision spring - 24