200938682 九、發明說明： t發明所廣之技術領域】 發明領域 本發明涉及捕捉沿挺針板和彎針張掛的面線和縫合底 5 線並將其切斷的縫紉機的切線裝置，更詳細爲，涉及切線 裝置所具備的可動刀片的結構。 【先前技術3 發明背景 第13圖爲表示現有技術的縫紉機切線裝置1的一部分 10 的透視圖。現有技術的缝紉機切線裝置1記載在例如日本國 “實公昭63-10149”號公報中。該現有技術採用這樣的結構： 當與形成在被縫製物上的針迹的終端相連的縫合底線们和 麵線T2、T3從挺針板的落針孔沿彎針2張掛，形成一連串的 針迹時，在可動刀片3沿箭頭Α1的方向前進，捕捉到從上述 15落針孔沿彎針2張掛的縫合底線Τ1的張掛部分Tla以及各面 線T2、T3的張掛部分T2a、T2b、T3a、T3b之後，可動刀片 3沿箭頭A2的方向後退’靠近設置在該後退位置上的固定刀 片4的刃尖部4a，與固定刀片4的刃尖部4a上形成的切割刃 4b協同動作，將各線Ή、τ2、Τ3各自的張掛部分Tla、T2a、 20 T2b、T3a、T3b剪斷。 上述可動刀片3爲上表面和下表面與大致垂直於上下 往復運動的縫鲂針5、6的移動路徑的虛擬平面平行地配置 的板狀的長的部件，上述上表面面向挺針板配置，上述下 表面面向彎針2配置。在該可動刀片3的上述前進方向Α1& 200938682 下游一側的一端部，形成朝向上述前進方向A1的下游一側 頂端變細的頂端部分7，在比該頂端部分7靠近縫製物的進 給方向B的上游一側，形成有縫合底線鈎掛凹陷部8和麵線 鈎掛凹陷部9。 5 縫製動作停止後，當可動刀片3前進時，上述可動刀片 3的頂端部分7進入配置在最靠後退位置上的一根面線乃的 各張掛部分T3a、T3b之間，然後穿過比缝合底線了丨的張掛 部分Tla靠縫製物的進給方向B的上游--即穿過與第13圖 的圖面垂直的靠身邊一側，用從上述頂端部分7向上述縫製 10物的進給方向B的下游一側延伸的引導面1〇,將縫合底線丁丄 的張掛部分Tla引導到上述縫合底線鈎掛凹陷部8内加以捕 捉’並且，用上述引導面1〇將各面線丁2、丁3的張掛部分T2a、 T3a引導到上述面線鈎掛凹陷部9内加以捕捉，由像上述那 樣可動刀片3向箭頭符號A2方向的退避動作將連接在被縫 15製物上的全部線T卜T2、T3各自的張掛部分Tla、T2a、T2b、 T3a、T3b拉到退避位置，與固定刀片4協同動作將線T1、 T2、T3各自的張掛部分Tla ' T2a、T2b、T3a、丁儿切斷。 上述現有技術存在這樣的問題：當像上述那樣可動刀 片3沿箭頭A1的方向前進、捕捉到縫合底線T1的張掛部分 2〇 Tla後，可動刀片3沿箭頭A2的彳向後退、將上述縫合底線 τι的張掛部分Tla和各面線了2、T3各自的張掛部分丁^、 T2b、T3a、T3b-起切斷’此時雖然能夠使上述縫合底線 T1的張掛。卩分Tia基本可靠地穿過近似u字形地包繞在彎 針2上的一根面線丁2的各張掛部分T2a、nb之間和T3a、T3b 200938682 之間’但在縫合底線T1的張掛部分Tia因可動刀片3向箭頭 A1的方向前進時産生的振動及其他原因而變成移動到比頂 端部分7移動的路徑更靠縫製物進給方向b的上游一侧的狀 態下，會出現不能將縫合底線Ti引導到缝合底線鈎掛凹陷 5部8内加以捕捉的情況，因此不能切斷缝合底線T1。 【發明内容】 發明概要 本發明的目的就是要提供一種能夠可靠地切斷縫合底 〇 線的縫紉機的切線裝置。 10 本發明爲一種縫紉機的切線裝置，包括：可動刀片， 在頂端部具有捕捉面線和縫合底線的線捕捉部，並且在該 線捕捉部進入到挺針板與彎針之間的前進位置和從該前進 位置退避後的後退位置之間往復移動；以及固定刀片，通 過上述可動刀片從前進位置向後退位置的移動，使被捕捉 15到上述可動刀片的線捕捉部上的縫合底線和麵線從縫製時 ㈣掛位置退避，並與上述可動刀片協同動作進行剪斷， β λ特徵在於：在上述可動刀片上，在比上述線捕捉部靠項 - _區域，形成有將縫合底線料耻料捕捉部 分線引導部。 ° 20 根據本發明，當可動刀片向前進方向移動時，利 可動刀片的比線捕捉部靠頂端一側形成的分 Ν +邵將缝 合底線的張掛在挺針板與彎針之間的張掛部分弓丨 捉部内，用線捕捉部可靠地捕捉縫合底線，然後^線捕 片向後退位置移位，由此能夠熊定刀片朗:動刀 片可靠地 7 200938682 剪斷捕捉到的縫合底線的張掛部分。 並且，本發明中，上述分線引導部最好是，在可動刀 片的頂端部’在相對於包含可動刀片的軸線的虛擬平面 的、與形成有上述線捕捉部的—側相反的-側，向從後退 5位置朝向前進位置的前進方向的下游一側突出地形成。 - 根據本發明，由於上述分線引導部向從後退位置朝肖 前進位置的前進方向的下游一側突出地形成在可動刀片的 - 頂端’因此即使縫合底線的張掛部分因彎針振動或其他原 因而向比可動刀片的頂端更靠近相對於包含上述軸線的虛 ❹ 10擬平面的與上述線捕捉部相反的一侧移動，也能夠將該張 掛部分引導向相對於上述虛擬平面的線捕捉部一側，能夠 可靠地捕捉縫合底線將其剪斷。 而且’本發明中，上述分線引導部最好是，在可動刀 片的頂端部’在相對於包含可動刀片的軸線的虛擬平面 15 的、形成有上述線捕捉部的一側，從可動刀片的面對上述 挺針板的上表面向内凹地形成。 根據本發明，由於上述分線引導部在可動刀片的頂端 〇 部，在相對於上述虛擬平面的形成有線捕捉部的一侧，從 上表面向内凹地形成，因此能夠用分線引導部將縫合底線 20的張掛部分從可動刀片的頂端引導到線捕捉部内，能夠可 靠地捕捉縫合底線將其剪斷。 而且，本發明中，上述分線引導部最好是，在可動刀 片的頂端部’在相對於包含可動刀片的袖線的虛擬平面 的、與形成有上述線捕捉部的一侧相反的一側’從可動刀 8 200938682 片的面對上述挺針板的上表面隆起地形成。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tangential device for a sewing machine that captures and cuts a noodle thread and a suture bottom line that are suspended along a needle plate and a looper, and more specifically The structure of the movable blade provided in the tangential device. [Prior Art 3 Background of the Invention] Fig. 13 is a perspective view showing a portion 10 of the sewing machine thread cutting device 1 of the prior art. The sewing machine tangential device 1 of the prior art is described in, for example, Japanese Patent Publication No. Sho 63-10149. This prior art adopts a structure in which a suture bottom line and an upper thread T2, T3 which are connected to the end of the stitch formed on the object to be sewn are hung from the needle drop hole of the needle jack along the looper 2 to form a series of needles. At the time of the track, the movable blade 3 advances in the direction of the arrow Α1, and the hanging portion T1a of the sewing bottom thread 张1 which is hung from the above-mentioned 15 needle-drop hole along the looper 2 and the hanging portions T2a, T2b, T3a of the respective upper thread lines T2 and T3 are caught. After T3b, the movable blade 3 retreats in the direction of the arrow A2 to approach the blade edge portion 4a of the fixed blade 4 disposed at the retracted position, and cooperates with the cutting edge 4b formed on the blade edge portion 4a of the fixed blade 4, The respective hanging portions Tla, T2a, 20T2b, T3a, and T3b of each of the turns τ, τ2, and Τ3 are cut. The movable blade 3 is a plate-shaped long member in which the upper surface and the lower surface are arranged in parallel with a virtual plane perpendicular to a movement path of the sewing needles 5 and 6 that reciprocate vertically, and the upper surface faces the needle plate. The lower surface is disposed facing the curved needle 2. A distal end portion 7 which is tapered toward a downstream end of the advancing direction A1 is formed at one end portion of the movable blade 3 on the downstream side in the advancing direction Α1 & 200938682, and is closer to the feeding direction of the sewing material than the distal end portion 7 On the upstream side of B, a suture bottom hooking recess 8 and a noodle hook recess 9 are formed. 5 After the sewing operation is stopped, when the movable blade 3 advances, the distal end portion 7 of the movable blade 3 enters between the respective hanging portions T3a and T3b disposed at the most retracted position, and then passes through the stitching. The bottom portion of the bottom line Tla is fed upstream of the feed direction B of the sewing material, that is, the side that is perpendicular to the plane of the drawing of Fig. 13, and the feeding from the above-mentioned tip portion 7 to the above-mentioned sewing material 10 a guiding surface 1〇 extending from the downstream side of the direction B guides the hanging portion Tla of the sewn bottom thread to the suture bottom thread hooking recess 8 to be captured, and the front surface is twisted by the guiding surface 1 The hanging portions T2a and T3a of the D3 are guided into the above-described upper thread hooking recessed portion 9, and are captured by the retracting operation of the movable blade 3 in the direction of the arrow symbol A2 as described above. The respective hanging portions Tla, T2a, T2b, T3a, and T3b of Tb T2 and T3 are pulled to the retracted position, and cooperate with the fixed blade 4 to extend the respective portions Tla 'T2a, T2b, T3a, and Ding of the lines T1, T2, and T3. Cut off. The above prior art has a problem in that, when the movable blade 3 advances in the direction of the arrow A1 as described above and the hanging portion 2〇Tla of the sewing bottom line T1 is caught, the movable blade 3 retreats along the direction of the arrow A2, and the suture bottom line is retracted. The hanging portion Tla of the τι and the respective upper threads 2, the respective hanging portions of the T3, T2b, T3a, and T3b are cut off. At this time, the suture bottom line T1 can be hung. The Tia is substantially reliably passed between approximately the U-shaped wraps around the hook portions T2a, nb of the upper thread 2 and between T3a and T3b 200938682 'but at the stitching bottom line T1 When the part Tia is moved to the upstream side of the sewing material feeding direction b by the vibration generated by the movable blade 3 in the direction of the arrow A1 and other reasons, it may not be possible to move to the upstream side of the sewing material feeding direction b. The suture bottom line Ti is guided to the suture bottom thread hooking recess 5 to be caught, so that the suture bottom line T1 cannot be cut. SUMMARY OF THE INVENTION An object of the present invention is to provide a thread cutting device for a sewing machine capable of reliably cutting a sewing thread. 10 is a thread cutting device for a sewing machine, comprising: a movable blade having a line catching portion for capturing a face line and a stitching bottom line at a top end portion, and entering a forward position between the needle pin plate and the looper at the line catching portion and Reciprocating movement between the retracted positions after retracting from the forward position; and fixing the blade, by the movement of the movable blade from the forward position to the retracted position, so that the suture bottom line and the upper thread captured on the line catching portion of the movable blade are captured 15 It is retracted from the hanging position at the time of sewing (4), and is sheared in cooperation with the movable blade. The β λ is characterized in that, on the movable blade, a stitching of the bottom line is formed in the item - _ area of the line catching portion. Capture part of the line guide. According to the present invention, when the movable blade moves in the advancing direction, the branching portion of the movable blade which is formed on the distal end side of the line catching portion + Shao sutures the suture bottom line between the needle pin plate and the looper portion In the bowing and catching section, the thread catching section reliably captures the stitching bottom line, and then the wire catching piece is displaced to the backward position, thereby being able to bear the blade ridge: the moving blade reliably 7 200938682 cuts the caught portion of the stitched bottom thread . Further, in the present invention, it is preferable that the branching guide portion has a side opposite to the side on which the line catching portion is formed on the imaginary plane of the movable blade with respect to the virtual plane including the axis of the movable blade. It is formed to protrude toward the downstream side in the advancing direction from the backward 5 position toward the forward position. According to the present invention, since the above-described branching guide portion is formed to protrude from the retracted position toward the downstream side in the advancing direction of the slanting forward position on the top end of the movable blade, even if the spliced portion of the suture bottom line is vibrated by the looper or the like And moving toward the side opposite to the line capturing portion with respect to the virtual imaginary plane including the axis, the tip portion of the movable blade can be guided to the line capturing portion with respect to the virtual plane. On the side, the suture bottom line can be reliably captured to cut it. Further, in the present invention, it is preferable that the branching guide portion is a side of the movable blade that is on the side of the virtual plane 15 including the axis of the movable blade and on which the line catching portion is formed. The upper surface facing the above needle plate is concavely formed inward. According to the aspect of the invention, the branching guide portion is formed in the distal end portion of the movable blade on the side of the virtual plane on which the wired capturing portion is formed, and is formed inwardly from the upper surface. The hanging portion of the bottom line 20 is guided from the tip end of the movable blade into the wire catching portion, and the sewing bottom line can be reliably caught to be cut. Further, in the present invention, it is preferable that the branch guide portion is a side opposite to a side on which the line catching portion is formed on the virtual plane of the sleeve line including the movable blade at the distal end portion of the movable blade 'Formed from the movable knife 8 200938682 piece facing the upper surface of the above needle plate.
1010
根據本發明，由於上述分線引導部在相對於上述虛擬 平面的與形成了線捕捉部的—側相反的—側，從上表面隆 起地形成，因此驗止縫合底_張掛縣向比頂端更靠 近相對於上述虛擬平面的與上述線捕捉部相反的_侧移 動，能夠被分線引導部引導到上述線捕捉部_側，因此能 夠將縫合底線的張掛部分引導到上述線捕捉部一側，二 可靠地捕捉縫合底線將其剪斷。 八 此夠防止縫合底線的張掛部 刀因彎針振動或其他原因而向比可動刀片的頂端更靠^目 對於包含上述轴線的虛擬平面的與上述線捕捉部相反的— 側移動’將該張掛部分引導到相對於上述虛擬平面的線捕 捉部一側，能夠可靠地捕捉縫合底線將其剪斷。 這樣一來，根據本發明 圖式簡單說明 通過下述的詳細說明和附圖，本發明的目的、特徵 優點應該能夠更加明瞭。 0 第1圖爲表示本發明的一個實施方式的縫紉機切線 置的一部分的透視圖。 第2圖爲表示可動刀片的頂端附近的放大俯視圖。 第3圖爲表示可動刀片的整體的俯視圖。 第4圖爲可動刀片頂端附近的放大透視圖。 第5圖爲表示縫合底線被分線引導部引導到縫合底線 捕捉部一側的途中的狀態的後視圖。 ” 第6Α及6Β圖爲用來說明切線裝置的動作的圖，第圖 9 200938682 表示彎針向前進位置移動，捕捉到面線的狀態；第6B圖表 示可動刀片向前進位置移動，剛剛將縫合底線引導到縫合 底線捕捉部一側之後的狀態。 第7A及7B圖爲用來說明切線裝置的動作的圖，第7A圖 5 表示向前進位置移動了的可動刀片的縫合底線捕捉部捕捉 到縫合底線的狀態，第7B圖表示可動刀片向後退方向移 動，將縫合底線和各面線一起拉向退避位置的即將剪切前 的狀態。 第8A及8B圖爲用來說明切線裝置的動作的圖，第8A圖 10 表示縫合底線和各面線被剪斷的狀態，第8B圖表示剪斷後 的各面線被拉到被縫製物上的狀態。 第9圖爲表示本發明的其他實施方式的縫紉機切線裝 置所使用的可動刀片的一部分的透視圖。 第10圖爲用來說明縫合底線被分線引導部引導到縫合 15 底線捕捉部的狀態的後視圖。 第11圖爲表示本發明的另外的其他實施方式的縫紉機 切線裝置所使用的可動刀片的一部分的透視圖。 第12圖爲用來說明縫合底線被可動刀片的分線引導部 引導的動作的後視圖。 20 第13圖爲表示現有技術的縫紉機切線裝置的一部分的 透視圖。 L實施方式3 較佳實施例之詳細說明 下面參考附圖詳細說明本發明的優選實施方式。 200938682 第1圖爲表示本發明的一個實施方式的縫紉機切線裝 置20的—部分的透視圖。本實施方式的縫紉機切線裝置20 §免置在雙線鎖縫縫紉機或平式連鎖縫縫紉機的挺針板下， 採用能夠在縫製動作停止時，用縫合底線捕捉部26捕捉縫 5合底線T1和各面線T2、T3的張掛在挺針板21的落針孔22、 23與彎針28之間的各張掛部分Tla、T2a、T2b、T3a、T3b 中的、與被縫製物相連的各張掛部分Tla，用面線捕捉部27 捕捉T2a、T3a，在從落針位置退避的退避位置將它們剪斷 的結構。 10 上述切線裝置20包括可動刀片30和固定刀片31，所述 可動刀片30在頂端25上具有捕捉縫合底線T1和各面線T2、 T3的縫合底線捕捉部26和麵線捕捉部27，並能夠沿箭頭 Al、A2的方向在這些線捕捉部26、27進入挺針板21與彎針 28之間的前進位置和從該前進位置退避後的後退位置之間 15 往復移動；所述固定刀片31通過上述可動刀片30沿從前進 位置到後退位置的箭頭A2的方向移動，使被可動刀片30的 線捕捉部26、27捕捉到的縫合底線T1和各面線T2、T3從縫 製時的張掛位置退避，與上述可動刀片30協同動作將縫合 底線T1及各面線T2、T3剪斷。 20 這樣的切線裝置20所具備的上述可動刀片30上，在比 上述縫合底線捕捉部26靠頂端的一側--即箭頭A1方向的 下游一側（第1圖的左邊)的區域，形成有將縫合底線T1引導 到上述縫合底線捕捉部26的分線引導部32。 第2圖爲表示可動刀片3〇的頂端部34附近的放大俯視 11 200938682 圖，第3圖爲表示可動刀片3〇的整體的俯視圖。上述分線引 導部32形成在可動刀片3〇的頂端料，而且是在相對於包 含可動刀片30的中心軸線L1且與可動刀片3〇的上表面或下 表面垂直（即與第2圖的圖面垂直）的虛擬平面、向與形成上 5述縫合底線捕捉部26的一側相反的_側（即第2_下^_ 移AL距離的偏心位置上，向從後退位置朝向前進位置的前 進方向A1的下游-側突出地形成在可動刀片3()的頂端部 ' 34 ° 固定在縫切機機體上的上述固定刀片31層疊在可動刀 ❹ 1〇片30上，從該.刀片31向後退方向A2突出的根部35上連 接有圖中沒有表示的驅動桿’由該驅動桿使可動刀片3〇向 前進方向A1或後退方向A2移位元驅動。壓線彈簧36的活動 端彈性地抵接在可動刀片30的下表面上，壓線彈簧36的根 部固定在圖中沒有表示的固定刀片安裝臺上。被上述可動 15刀片30和固定刀片31剪斷的縫合底線T1的下一個針迹的開 始端部分，由該壓線彈簧36保持。 第4圖爲可動刀片30的頂端部34附近的放大透視圖，第 〇 5圖爲表示缝合底線T1被分線引導部32引導向縫合底線捕 捉部26—側的途中的狀態的後視圖。如上所述，由於在可 20動刀片的比縫合底線捕捉部26靠頂端的一側形成有分線 引導部32，因此當可動刀片30向前進方向A1移動時，通過 該分線引導部32，將縫合底線T1的張掛在挺針板？！與·寶針 28之間的張掛部分Tla引導向縫合底線捕捉部26一侧，能夠 用縫合底線捕捉部26可靠地捕捉縫合底線τι。因此，當可 12 200938682 動刀片30向箭頭A2的方向移動、向後退位置移位時，能夠 與固定刀片31協同動作，可靠地將捕捉到縫合底線捕捉部 26上的縫合底線τι的張掛部分Tla剪斷。 第6A、6B、7A、7B、8八及剛爲用來說明切線裝置 5 20的動作的圖’第6A圖表示彎針28向前進位置移動捕捉 ' ^面線72、T3的狀態；第6B圖表示可動刀3G向前進位置 移動’剛剛將縫合底線T1引導向縫合底線捕捉部26 一側的 狀態。並且，第7A圖表示縫合底線T1被向前進位置移動了 料動刀片3G的缝合底線捕捉部％捕捉的狀態；㈣圖表 1〇示可動刀片30向後退方向A2移動，縫合底線们和各面線 T2、T3—起被拉向退避位置的即將剪斷之前的狀態。而且， 第8Α圖表示、缝合底線们和各面線Τ2、Τ3被剪斷的狀態；第 8Β圖表示剪斷後的各面線Τ2、Τ3的T2b、T3b被拉到被縫製 物上的狀態。 15 當形成一連串的針迹時，彎針28沿箭頭AbA2的方向 φ 則後往復的動作停止，如第6A圖所示那樣，可動刀片3〇從 重疊在固定刀片31下面的退避位置向前進方向八丨移動，經 過被彎針28捕捉的各面線T2、T3的近似u字形的各張掛部 刀T2a、T2b之間以及各張掛部分T3a、T3b之間，即使如第 2〇 6B圖所示那樣縫合底線T1的張掛部分Tia比可動刀片3〇的 中心軸線L1向上述送進方向B的上游一側（第6B圖的身邊一 側）移位一些，通過分線引導部32向比該張掛部分TU靠上 述送進方向B的上游一側彎回，能可靠地將張掛部分Tla引 導到縫合底線捕捉部26—側，像第7A圖所示那樣張掛部分 13 200938682 嵌入到縫合底線捕捉部26内，可靠地被捕捉。 這樣捕捉到的縫合底線T1的張掛部分Tla如第7B圖所 示因可動刀3G向後退方向A2移動而與各面線T2、τ3一起 被拉到退敎置，像第8Α圖所示那樣在各面線丁2 、Τ3被剪 5斷後’縫合底線71被剪斷，該縫合底線了丨的下—個針迹的 開始部分被上述壓線彈簧36的彈性地按壓在可動刀片30的 下表面保持著，像第8Β圖所示那樣各面線Τ2、Τ3被拉到被 縫製物上。 这樣一來’由於上述分線引導部32向前進方向Α1的下 10游-側突出地形成在可動刀片3〇的頂端，因此能夠可靠地 捕捉縫合底線Τ1將其剪斷。 第9圖爲表不本發明的其他實施方式的切線裝置所使 用的可動刀片3Ga的-部分的透視圖，第1G圖爲用來說明由 分線引導部32將縫合底線T1引導向縫合底線捕捉部26 一側 15的狀態的後視圖。另外，與上述實施方式相對應的部分添 加相同的參照符號。本實施方式的切線裝置中上述分線引 導部32形成在可動刀片3〇&的頂端部，而且是在相對於包含 可動刀片30a的中心軸以的虛擬平面的形成了上述縫合底 線捕捉部26的一侧，在可動刀片3〇a的面對上述挺針板以的 20上表面向内凹地形成在可動刀片30a的頂端部。 這樣一來，由於分線引導部32在相對於上述虛擬平面 的形成了縫合底線捕捉部26的一側，在可動刀片3〇a的上表 面向内凹地形成，因此能防止縫合底線丁丨的張掛部分 因彎針振動及其他原因，向比可動刀片的頂端更靠近相對 200938682 =含上 Γ軸線的虛擬平面的與上述線捕捉部相反的一側 移動’能夠將該張掛部分Tla引導向相對於上述虛擬平面的 線捕捉。卩26側’能夠可靠地捕捉縫合底線將其剪斷。According to the present invention, since the above-described branching guide portion is formed to be raised from the upper surface on the side opposite to the side on which the line capturing portion is formed with respect to the virtual plane, the suture bottom is further examined. The _ side movement opposite to the line capturing portion with respect to the virtual plane can be guided to the line capturing portion _ side by the branching guide portion, so that the hanging portion of the sewing bottom line can be guided to the line capturing portion side. Second, reliably capture the stitching bottom line and cut it. In this case, it is sufficient to prevent the hanging knife of the sewing bottom thread from moving toward the top end of the movable blade due to the bending needle vibration or the like, and the side moving of the virtual plane including the above-mentioned axis opposite to the above-mentioned line capturing portion The hanging portion is guided to the side of the line capturing portion with respect to the above-described virtual plane, and the sewing bottom line can be reliably caught and cut. BRIEF DESCRIPTION OF THE DRAWINGS The objects and features of the present invention will become more apparent from the detailed description and appended claims. 0 Fig. 1 is a perspective view showing a part of a thread cutting line of a sewing machine according to an embodiment of the present invention. Fig. 2 is an enlarged plan view showing the vicinity of the tip end of the movable blade. Fig. 3 is a plan view showing the entire movable blade. Figure 4 is an enlarged perspective view of the vicinity of the top end of the movable blade. Fig. 5 is a rear elevational view showing a state in which the suture bottom thread is guided to the suture bottom line capturing portion side by the branch guide portion. Fig. 6 and Fig. 6 are diagrams for explaining the operation of the thread cutting device. Fig. 9 200938682 shows that the looper moves to the forward position to capture the state of the upper thread; and Fig. 6B shows that the movable blade moves to the forward position, just to be sutured. The bottom line is guided to the state after the side of the bottom line catching portion is sewn. FIGS. 7A and 7B are views for explaining the operation of the thread cutting device, and FIG. 7A is a view showing the stitching of the sewing blade of the movable blade that has moved to the advanced position. In the state of the bottom line, Fig. 7B shows a state in which the movable blade moves in the backward direction, and the sewing bottom line and each of the upper thread lines are pulled toward the retracted position immediately before the cutting. Figs. 8A and 8B are diagrams for explaining the operation of the thread cutting device. Fig. 8A shows a state in which the sewing thread and the upper thread are cut, and Fig. 8B shows a state in which the respective upper thread after the cutting is pulled onto the object to be sewn. Fig. 9 is a view showing another embodiment of the present invention. A perspective view of a part of the movable blade used in the thread cutting device of the sewing machine. Fig. 10 is a view for explaining the state in which the sewing thread is guided by the branching guide to the bottom line catching portion of the stitching 15 Fig. 11 is a perspective view showing a part of a movable blade used in a sewing machine thread cutting device according to still another embodiment of the present invention. Fig. 12 is a view for explaining the action of guiding the sewing thread to be guided by the branching guide of the movable blade. Figure 13 is a perspective view showing a portion of a prior art sewing machine tangential device. L. Embodiment 3 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. A perspective view showing a portion of the sewing machine tangential device 20 of one embodiment of the present invention. The sewing machine tangential device 20 of the present embodiment is detached from the needle plate of a double-line lock sewing machine or a flat interlocking sewing machine. When the sewing operation is stopped, the sewing bottom thread catching portion 26 can capture the stitching portion 5 and the respective upper threads T2 and T3, and the respective hanging portions of the needle threading holes 22, 23 and the looping needles 28 of the needle jacks 21 are caught. Among the Tla, T2a, T2b, T3a, and T3b, each of the hanging portions Tla connected to the object to be sewn, the T2a and T3a are captured by the needle thread catching portion 27, and are retracted from the needle drop position. The structure is cut away from the position. 10 The above-described tangential device 20 includes a movable blade 30 and a fixed blade 31 having a suture bottom line catching portion 26 that captures the suture bottom line T1 and the respective upper lines T2, T3 on the top end 25. The upper thread catching portion 27 is capable of entering between the advancement position between the needle catching plate 21 and the looper 28 and the retracted position after retracting from the forward position in the directions of the arrows A1 and A2. 15 reciprocating movement; the fixed blade 31 is moved by the movable blade 30 in the direction of the arrow A2 from the advanced position to the retracted position, so that the suture bottom line T1 and the upper thread captured by the line capturing portions 26, 27 of the movable blade 30 are caused. T2 and T3 are retracted from the hanging position at the time of sewing, and the sewing bottom thread T1 and the respective upper threads T2 and T3 are sheared in cooperation with the movable blade 30. In the above-described movable blade 30 of the thread cutting device 20, a region on the downstream side of the suture bottom line capturing portion 26, that is, on the downstream side in the direction of the arrow A1 (the left side in the first drawing) is formed in the movable blade 30. The suture bottom line T1 is guided to the branch line guiding portion 32 of the suture bottom line capturing portion 26 described above. Fig. 2 is an enlarged plan view showing the vicinity of the distal end portion 34 of the movable blade 3A. 11 200938682. Fig. 3 is a plan view showing the entire movable blade 3〇. The above-described branch guide portion 32 is formed at the tip end of the movable blade 3, and is perpendicular to the upper surface or the lower surface of the movable blade 3A with respect to the central axis L1 including the movable blade 30 (that is, with the map of FIG. 2). The virtual plane perpendicular to the surface is advanced toward the forward position from the retracted position toward the eccentric position opposite to the side on which the bottom line catching portion 26 is stitched (i.e., the second_lower_allocated AL distance) The downstream side of the direction A1 is formed to protrude from the tip end portion of the movable blade 3 ("34". The fixed blade 31 fixed to the body of the slitting machine is laminated on the movable blade 1 and 30, from the blade 31 A drive rod (not shown) is connected to the root portion 35 protruding in the backward direction A2. The movable blade 3 is driven by the drive rod in the forward direction A1 or the backward direction A2. The movable end of the pressure spring 36 elastically abuts. Attached to the lower surface of the movable blade 30, the root of the pressure wire spring 36 is fixed to a fixed blade mounting table not shown. The next stitch of the sewing bottom line T1 cut by the movable 15 blade 30 and the fixed blade 31 described above. The beginning part of The pressure line spring 36 is held. Fig. 4 is an enlarged perspective view of the vicinity of the distal end portion 34 of the movable blade 30, and Fig. 5 is a view showing the sewing bottom line T1 being guided to the side of the suture bottom line catching portion 26 by the branching guide portion 32. A rear view of the state. As described above, since the branch guide portion 32 is formed on the side of the detachable bottom thread catching portion 26 of the detachable bottom blade catching portion 26, when the movable blade 30 moves in the advancing direction A1, the passage is passed. The branch guide portion 32 guides the suture bottom line T1 to the suture bottom line catching portion 26 side, and the suture bottom line catching portion 26 can be reliably caught by the suture bottom thread catching portion 26. The bottom line τι. Therefore, when the movable blade 30 is movable in the direction of the arrow A2 and displaced to the retracted position, the movable blade 30 can cooperate with the fixed blade 31 to reliably capture the stitching bottom line τι on the stitching bottom line catching portion 26. The hanging portion Tla is cut. Sections 6A, 6B, 7A, 7B, 8 and 8 are just diagrams for explaining the operation of the thread cutting device 5 20. FIG. 6A shows the looper 28 moving toward the forward position to capture the '^ surface line 72, The state of T3; 6B is a view showing a state in which the movable blade 3G is moved to the forward position. The sewing bottom line T1 is just guided to the sewing bottom line catching portion 26 side. Further, Fig. 7A shows the sewing bottom line T1 being moved to the advanced position by the sewing blade 3G. (4) Figure 1 shows a state in which the movable blade 30 moves in the backward direction A2, and the sewing bottom line and the respective upper threads T2 and T3 are pulled to the retracted position immediately before the cutting. The figure shows, the state in which the bottom thread and the upper thread Τ2, Τ3 are cut, and the eighth figure shows the state in which the respective fascia 2, Τ3, T2b, and T3b after the cutting are pulled onto the object to be sewn. 15 When a series of stitches are formed, the looper 28 is stopped in the direction φ of the arrow AbA2, and as shown in Fig. 6A, the movable blade 3〇 is moved from the retracted position overlapping the fixed blade 31 toward the forward direction. The gossip movement passes between the hook-shaped blades T2a and T2b of the approximately U-shape of each of the upper threads T2 and T3 captured by the curved needle 28, and between the respective hanging portions T3a and T3b, even as shown in FIG. The hanging portion Tia of the sewing bottom thread T1 is displaced to the upstream side of the feeding direction B (the side of the side of FIG. 6B) from the center axis L1 of the movable blade 3A, and is traversed by the branching guide 32. The partial TU is bent back on the upstream side of the feeding direction B, and the hanging portion Tla can be reliably guided to the side of the sewing bottom thread catching portion 26, and the hanging portion 13 200938682 is embedded in the sewing bottom thread catching portion 26 as shown in Fig. 7A. Inside, it is reliably captured. The hanging portion Tla of the stitching bottom line T1 thus captured is moved to the retracting direction together with the respective upper lines T2 and τ3 as the movable blade 3G moves in the backward direction A2 as shown in Fig. 7B, as shown in Fig. 8 The suture bottom line 71 is cut after each of the upper thread D2 and the top thread 3 is cut, and the beginning portion of the lower stitch of the sewing bottom thread is elastically pressed against the lower surface of the movable blade 30 by the above-mentioned pressure spring 36. Hold, as shown in Fig. 8 , the upper threads Τ 2, Τ 3 are pulled onto the object to be sewn. In this way, since the above-described branch guide portion 32 is formed at the distal end of the movable blade 3A in the downward direction of the forward direction Α1, it is possible to reliably capture the suture bottom thread Τ1 and cut it. Fig. 9 is a perspective view showing a portion of the movable blade 3Ga used in the thread cutting device according to another embodiment of the present invention, and Fig. 1G is a view for explaining that the sewing thread T1 is guided by the branching guide portion 32 to the sewing bottom line. Rear view of the state of side 26 of side 26. Further, the same reference numerals are added to the portions corresponding to the above embodiments. In the thread cutting device of the present embodiment, the branching guide portion 32 is formed at the distal end portion of the movable blade 3'' and the suture bottom line capturing portion 26 is formed on a virtual plane with respect to the central axis including the movable blade 30a. One side is formed inwardly at the tip end portion of the movable blade 30a at the upper surface of the movable blade 3A facing the needle plate. In this way, since the branch line guiding portion 32 is formed inwardly on the upper surface of the movable blade 3A with respect to the side of the virtual plane on which the stitching bottom line catching portion 26 is formed, it is possible to prevent the sewing of the bottom thread. The hanging portion is moved closer to the side than the above-mentioned line catching portion of the virtual plane including the upper jaw axis due to the bending needle vibration and other reasons, and is able to guide the hanging portion Tla to the opposite side with respect to the 200938682=the side of the virtual plane including the upper jaw axis The line capture of the above virtual plane. The 卩26 side' can reliably capture the suture bottom line and cut it.
10 第11圖爲表示本發明的另外的其他實施方式的切線裝 置用可動刀片30b的—部分的透視圖，第_爲用來說明縫 合底線T!破可動刀片鳩的分線引導部如導的動作的後 視圖。另外’與上述實施方式相㈣的部分添加相同的參 照符號。本實施方式的轉裝置中，上述分㈣導部郷 成在可動刀片3Gb的頂端部，而且是在相對於包含可動刀片 3〇b的軸線的虛擬平面的、與形成了縫合底線捕捉部％的一 側相反的-侧，從可動刀片鳩的面對挺針_的上表面隆 起地形成在可動刀片3〇b的頂端部。 ❹ 這樣一來，由於分線引導部在相對於虛擬平面的與形 成了縫合底線捕捉部的一側相反的一側，從上表面隆起地 μ形成，因此能防止縫合底線T1的張掛部分Tu因料的振動 及其他原因而向比可動刀片的頂端更靠近相對於包含上述 轴線的虛擬平面的與上述線捕捉部相反的_側移動，能夠 將該張掛部分m引導向上述虛擬平面的線捕捉部％的一 側，能夠可靠地捕捉縫合底線將其剪斷。 20 秘明的又—另外的實施方式也可以在可動刀片的頂 端部，形成第1〜5圖、第6A和6B圖、第7A*7b圖、以及第 8A和8B圖所示的向前進方向A1突出的第丨分線引導部”以 及第9和10圖所示的從上表面向内凹的第2分線弓丨導部以這 兩者；並且也可以形成第1〜5圖、第6八和68圖、第7八和78 15 200938682 圖、以及第8A和8B圖所示的向前進方向A1突出的第1分線 引導部32,和第11及12圖所示的從上表面隆起的第3分線引 導部32這兩者；而且還可以形成第9和10圖所示的從上表面 向内凹的第2分線引導部32和第11及12圖所示的從上表面 5 隆起的第3分線引導部32這兩者；還可以形成第1〜8A圖和 第8B圖所示的向前進方向A1突出的第1分線引導部32、第9 和10圖所示的從上表面向内凹的第2分線引導部32、以及第 11及12圖所示的從上表面隆起的第3分線引導部32的全 部。通過在可動刀片的頂端部形成這些第1〜第3分線引導 10 部的適當組合，能夠更可靠地防止縫合底線的捕捉失誤。 本發明能夠以不脫離其精神或主要特徵的其他各種形 態實施。因此，上述實施方式的所有點只是示例，本發明 的範圍爲權利要求的範圍，不受說明書文本的任何約束。 而且，屬於權利要求範圍内的變形或變更全部爲本發明的 15 範圍。 L圖式簡單說明3 第1圖爲表示本發明的一個實施方式的縫紉機切線裝 置的一部分的透視圖。 第2圖爲表示可動刀片的頂端附近的放大俯視圖。 20 第3圖爲表示可動刀片的整體的俯視圖。 第4圖爲可動刀片頂端附近的放大透視圖。 第5圖爲表示縫合底線被分線引導部引導到縫合底線 捕捉部一側的途中的狀態的後視圖。 第6A及6B圖爲用來說明切線裝置的動作的圖，第6A圖 200938682 表示彎針向前進位置移動，捕捉到面線的狀態；第6B圖表 示可動刀片向前進位置移動，剛剛將縫合底線引導到縫合 底線捕捉部一側之後的狀態。 第7A及7B圖爲用來說明切線裝置的動作的圖，第7A圖 ； 5 表示向前進位置移動了的可動刀片的縫合底線捕捉部捕捉 到縫合底線的狀態，第7B圖表示可動刀片向後退方向移 動，將縫合底線和各面線一起拉向退避位置的即將剪切前 的狀態。 G 第8A及8B圖爲用來說明切線裝置的動作的圖，第8A圖 10 表示縫合底線和各面線被剪斷的狀態，第8B圖表示剪斷後 的各面線被拉到被縫製物上的狀態。 第9圖爲表示本發明的其他實施方式的縫紉機切線裝 置所使用的可動刀片的一部分的透視圖。 第10圖爲用來說明縫合底線被分線引導部引導到縫合 15 底線捕捉部的狀態的後視圖。 第11圖爲表示本發明的另外的其他實施方式的縫紉機 ® 切線裝置所使用的可動刀片的一部分的透視圖。 . 第12圖爲用來說明縫合底線被可動刀片的分線引導部 引導的動作的後視圖。 20 第13圖爲表示現有技術的縫紉機切線裝置的一部分的 透視圖。 【主要元件符號說明】 1.. .縫幼機切線裝置 3...可動刀片 2.. .彎針 4...固定刀片 17 200938682 4a...刃尖部 30b...可動刀片 4b...切割刃 31...固定刀片 5、6…縫紉針 32…分線引導部 7...頂端部分 34...頂端部 - 8...縫合底線钩掛凹陷部 35…根部 9...麵、線钩掛凹陷部 36...壓線彈簧 20...縫紉機切線裝置 Al、A2...箭頭 21…挺針板 B...進給方向 22、23...落針孔 L1...中心軸 25...頂端 T1".縫合底線 26…縫合底線捕捉部 T2、T3...各面線 27…面線捕捉部 Tla、T2a、T2b、T3a、T3b 28...彎針 …各張掛部分 30...可動刀片 30a...可動刀片 T2a、T3a...捕捉 ^ ❹ 1810 is a perspective view showing a portion of a movable blade 30b for a thread cutting device according to still another embodiment of the present invention, and is a sectional guide portion for explaining a sewing bottom thread T! The rear view of the action. Further, the same reference numerals are added to the portions of the above embodiment (4). In the rotary device according to the present embodiment, the sub-fourth guide portion is formed at the distal end portion of the movable blade 3Gb, and is formed on the imaginary plane with respect to the axis including the movable blade 3b, and the suture bottom line capturing portion is formed. The opposite side of one side is formed at the tip end portion of the movable blade 3〇b from the upper surface of the movable blade 面对 facing the needle. ❹ In this way, since the branching guide portion is formed on the side opposite to the side of the virtual plane opposite to the side on which the suture bottom line capturing portion is formed, the protruding portion is formed from the upper surface, so that the hanging portion Tu of the suture bottom line T1 can be prevented. The vibration of the material and other causes move closer to the side opposite to the line capturing portion than the virtual plane including the axis, and can guide the hanging portion m to the line of the virtual plane. One side of the part can reliably capture the stitching bottom line and cut it. 20 succinctly another embodiment may also form the forward direction shown in FIGS. 1 to 5, 6A and 6B, 7A*7b, and 8A and 8B at the distal end portion of the movable blade. The first minute branch guide portion of the A1 protrusion and the second branch line guide portion recessed from the upper surface shown in FIGS. 9 and 10 are both; and the first to fifth figures can also be formed. 6 and 68, 7, 8 and 78 15 200938682, and the first branch guide 32 protruding in the forward direction A1 shown in Figs. 8A and 8B, and the upper surface shown in Figs. 11 and 12 Both of the raised third branch guides 32; and the second split guide 32 which is recessed from the upper surface as shown in FIGS. 9 and 10 and the upper and lower shown in FIGS. 11 and 12 can be formed. Both of the third branch guides 32 that are raised on the surface 5; the first branch guides 32, 9 and 10 that protrude in the forward direction A1 as shown in Figs. 1-8A and 8B can be formed. The second branch guide portion 32 which is recessed from the upper surface and the third branch guide portion 32 which is raised from the upper surface shown in FIGS. 11 and 12 are formed by the tip end portion of the movable blade. The appropriate combination of the first to third sub-guides 10 can more reliably prevent the capture of the suture bottom line. The present invention can be implemented in various other forms without departing from the spirit or main features. Therefore, all of the above embodiments The scope of the present invention is intended to be in the scope of the claims, and is not to be construed as limiting the scope of the claims. Fig. 2 is an enlarged plan view showing the vicinity of the distal end of the movable blade. Fig. 3 is a plan view showing the entire movable blade. Fig. 4 is a movable view. An enlarged perspective view of the vicinity of the tip end of the blade. Fig. 5 is a rear view showing a state in which the sewing bottom line is guided to the side of the sewing bottom line catching portion by the dividing guide portion. Figs. 6A and 6B are views for explaining the operation of the thread cutting device. Fig. 6AFig. 200938682 shows that the looper moves to the forward position to capture the state of the upper thread; Figure 6B shows the movable knife Moving to the forward position, just before the sewing thread is guided to the side where the bottom thread catching portion is sewn. Figs. 7A and 7B are views for explaining the operation of the thread cutting device, Fig. 7A; 5 showing the movable movement to the forward position. The suture bottom line catching portion of the blade captures the state of the stitching bottom line, and Fig. 7B shows the state in which the movable blade moves in the backward direction, and the stitching bottom line and each of the upper thread lines are pulled toward the retracted position immediately before the cutting. G Figs. 8A and 8B In order to explain the operation of the thread cutting device, FIG. 8A shows a state in which the sewing thread and the upper thread are cut, and FIG. 8B shows a state in which the respective upper thread after the cutting is pulled onto the object to be sewn. Fig. 9 is a perspective view showing a part of a movable blade used in a sewing machine thread cutting device according to another embodiment of the present invention. Fig. 10 is a rear elevational view for explaining a state in which the suture bottom line is guided to the suture 15 bottom line catching portion by the branch guide portion. Fig. 11 is a perspective view showing a part of a movable blade used in a sewing machine ® tangential device according to still another embodiment of the present invention. Fig. 12 is a rear elevational view for explaining the action of the sewing thread being guided by the branching guide of the movable blade. Figure 13 is a perspective view showing a portion of a prior art sewing machine thread cutting device. [Description of main component symbols] 1.. Sewing machine tangential device 3... movable blade 2: bending needle 4... fixed blade 17 200938682 4a... blade tip 30b... movable blade 4b. .. cutting blade 31...fixing blade 5,6...sewing needle 32...parting guide portion 7...tip portion 34...top portion - 8...sewing the bottom thread hooking recess 35...the root portion 9. .. surface, line hooking recessed portion 36...pressure line spring 20...sewing machine tangent device A1, A2...arrow 21...pinner plate B...feeding direction 22,23...needle drop Hole L1...Center axis 25...Through T1".Sewing bottom line 26...Sewing bottom line capturing portions T2, T3...Face lines 27...Upper line capturing portions Tla, T2a, T2b, T3a, T3b 28. Curved needles... each hanging portion 30... movable blade 30a... movable blade T2a, T3a... capture ^ ❹ 18