200934906 六、發明說明： 【發明所屬技術領域】 發明領域 本發明涉及用來在扁平縫縫紉機和雙重環縫縫切 5 10 15 鲁 20 縫紉機的縫製動作結束後切斷面線和縫合底線（小—六糸） 的缝紉機的紗線切斷裝置。 【先前技術3 發明背景 現有技術的縫紉機的紗線切斷裝置具有可動刀片、驅 動桿、固定刀片和夾線板，所述可動刀片在頂端具有捕捉 面線和縫合底線的紗線捕捉部，能夠在紗線捕捉部進入挺 針板與彎針之間的前進位置和後退的後退位置之間往復移 動；所述驅動桿使可動刀片在上述前進位置與後退位置之 間往復移動；所述固定刀片當縫製動作結束後上述可動刀 片從前進位置移動到後退位置時，與上述可動刀片協調作 用將被上述紗線捕捉部捕捉到的面線和縫合底線切斷；所 述夹線板將被切斷了的面線和縫合底線令的縫合底線的端 部彈性擠壓到上述可動刀片的頂端部，在這種狀態下央持 縫合底線的端部。 在縫製動作結束後切斷紗線時，爲了縮短與被縫製物 的針跡相連的面線和縫合底線的殘留長度，有必要使可動 刀片、固定刀片和夾線板向靠近挺針板和彎針的前方進入 位置移動，並且，在紗線切斷後的下一次縫製動作時爲 了避免可動刀片、固定刀片和夾線板干涉彎針的動作，有 3 200934906 ==動刀片、固定刀片和爽線板從上述切斷紗線 時的=位置移_避開上料針動作區域的退避位置。 向退=紗線切斷後使可動刀片、固定刀片和_ ^ 動的移動部件，提出過使保持可動刀片、固 二片和夾線板的刀片保持台直線或近似直線地沿在上述 二片切斷紗線用的前進位置與後退位置之間往復移動 香路㈣延長線移動到退避位置的結構(參照例如日本國 實公昭63-10149號公報）。 10 15 上述見有技術中，上述可動刀片在挺針板的下面與彎 針的上面之間極其狹窄的空間内進人，但由於零部件加工 精度不同等㈣，可動W的進人位置和在進人後上述極 其狹乍的工間内的位置有可能在上下某—個方向上稍微變 因此爲了 4除可動刀片的這種進人前後的高度位置 的偏差#必要調整刀片保持台的高度但沒有設置使刀 片保持台在上下方向上移動的結構。因此，可動刀片進入 時有可能發生上述可動刀片與挺針板的下表面和 彎針的上 表面中的$彳@面接觸’或者不能用可動刀片的紗線釣掛 部確實地捕捉面線的情泥。 C發明内容:j 20 發明概要 本發明的目的就是要提供一種能夠用可動刀片確實地 捕捉面線將其_的、騎機的紗㈣斷裝置。 本發月爲具#下特徵的縫幼機的紗線切斷裝置包 括可動刀片在頂％具有捕捉面線和縫合底線到的紗線 200934906BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cutting a noodle thread and a suture bottom line after a sewing operation of a flat seam sewing machine and a double seam sewing machine 5 10 15 Lu 20 sewing machine (small- Six 糸) The yarn cutting device of the sewing machine. [Prior Art 3] The yarn cutting device of the prior art sewing machine has a movable blade, a driving lever, a fixed blade, and a wire clamping plate, and the movable blade has a yarn catching portion that captures the upper thread and the sewing bottom thread at the tip end, and is capable of Reciprocating between a forward position between the yarn catching portion entering the needle plate and the curved needle and a retreating rearward position; the drive rod reciprocating the movable blade between the advanced position and the retracted position; the fixed blade When the movable blade moves from the forward position to the retracted position after the sewing operation is completed, the upper thread and the sewing thread caught by the yarn catching portion are cut in cooperation with the movable blade; the clamping plate is cut off. The upper thread of the suture bottom line and the suture bottom line are elastically pressed to the distal end portion of the movable blade, and the end portion of the suture bottom line is held in this state. When the yarn is cut after the sewing operation is completed, in order to shorten the remaining length of the upper thread and the sewn bottom thread which are connected to the stitch of the sewn object, it is necessary to bring the movable blade, the fixed blade and the clamping plate closer to the needle plate and the bend. The front position of the needle moves, and in the next sewing operation after the yarn is cut, in order to prevent the movable blade, the fixed blade and the tension plate from interfering with the action of the looper, there are 3 200934906 == moving blade, fixed blade and cool wire The plate is moved from the position where the yarn is cut as described above - avoiding the retracted position of the loading needle operating region. After the yarn is cut off, the movable blade, the fixed blade, and the moving member are moved so that the blade holding table that holds the movable blade, the solid plate, and the clamping plate is straight or approximately straight along the two pieces. The structure in which the extension of the yarn is reciprocated between the forward position and the retracted position of the broken yarn (4) and the extension line is moved to the retracted position (see, for example, Japanese Patent Publication No. 63-10149). 10 15 In the above-mentioned technique, the movable blade enters a space in an extremely narrow space between the lower surface of the needle plate and the upper surface of the curved needle, but due to the difference in machining precision of the parts, etc., the moving position of the movable W and the After entering, the position in the extremely narrow working space may be slightly changed in the upper and lower directions. Therefore, in order to divide the height position of the moving blade before and after the moving position, it is necessary to adjust the height of the blade holding table. There is no structure for moving the blade holding table in the up and down direction. Therefore, when the movable blade enters, there is a possibility that the movable blade and the lower surface of the needle plate and the upper surface of the looper are in contact with each other or the yarn hook of the movable blade cannot accurately capture the upper thread. Love mud. C SUMMARY OF THE INVENTION: j 20 SUMMARY OF THE INVENTION It is an object of the present invention to provide a machine (four) breaking device capable of reliably capturing a needle thread with a movable blade. The yarn cutting device of the slitting machine having the characteristics of the present invention includes the movable blade at the top % having the yarn for capturing the upper thread and the bottom thread to be sewn 200934906
10 15 、卩I夠在該紗線捕捉部前進到挺針板與彎針之間的 7入位置和從該進人位置退出的後退位置之間移動；驅動 才于使上述可動刀片在進人位置與後退位置之間往復移 固疋刀片’當上述可動刀片從進入位置退出到後退位 置時與上述可動刀片協觸作，將被上述紗線捕捉部捕 捉到的面線和縫合底線切斷；夹線板，彈性地將被上述可 動刀片和固疋刀片切斷的面線和縫合底線中的縫合底線的 端部夾持在夾線板與上述可動刀片的頂端之間；刀片保持 座’保持上述可動刀片、固定刀片和夹線板；刀片保持座 驅動單元，使上述刀片保持座在靠近挺針板和寶針的進入 位置與從該進入位置退避到後方的退避位置之間移動·底 座，設置上述刀片保持座驅動單元；高度調整部，設置在 上述底座上’使上述刀片保持座向靠近挺針板並且離開彎 針的上方以及離開挺針板並且靠近彎針的下方移動。10 15 , 卩 I is sufficient to move between the 7-in position between the needle catching plate and the curved needle and the retracted position from the entering position at the yarn catching portion; the driving is to make the movable blade enter the person Reciprocating the blade between the position and the retracted position. When the movable blade is retracted from the entry position to the retracted position, the movable blade cooperates with the movable blade to cut the upper thread and the suture bottom line captured by the yarn capturing portion; a clamping plate elastically sandwiching an upper thread cut by the movable blade and the fixed blade and an end of the sewing bottom thread in the sewing bottom thread between the tension plate and the top end of the movable blade; the blade holder 'maintains The movable blade, the fixed blade and the clamping plate; the blade holder driving unit moves the base holder between an entry position close to the needle plate and the treasure needle and a retracted position retracted from the entry position to the rear. Providing the above-mentioned blade holder driving unit; a height adjusting portion disposed on the base to 'close the blade holder toward the needle plate and away from the looper and away from the needle And close to the looper moves downward.
20 如果採用本發明，當縫製動作停止時，驅動桿向前進 方向角位移使可動刀片前進，由設置在頂端的紗線捕捉部 捕捉面線和縫合底線；軸桿向後退方向肖位移使可動刀 片在上述紗線捕捉部保持面線和縫合底線的狀態下從進入 位置向後退位置移動，可動刀片與固定刀片協調動作將面 線和縫合底線切斷，然後用刀片保持座驅動單元使刀片保 持座繼續向後退方向角位置使刀片保持座退避到退避位 置。 由於這樣的進入位置和後退位移以及進入位置和退避 位置能夠用高度調整部將刀片保持座的高度位置調整到最 5 200934906 合適的位置上，因此能夠用高度調整部調整上述刀片保持 座的咼度，能夠將在挺針板下表面與彎針上表面之間狹窄 的空間内進出的可動刀片配置在不與挺針板的下表面和變 針的上表面中的任一個面接觸的位置上，用可動刀片的導 5紗部確實地捕捉面線將其切斷。 並且，本發明優選上述高度調整部具有調整部件，所 述調整部件具有在與刀片保持座在進入位置與退避位置之 間移動的路徑交叉的方向上傾斜於上述刀片保持座的引導 面’i夠在與刀片保持座移動的路徑交又的方向上移動地 10設置在上述底座上。 由於上述高度調整部具有調整部件，所述調整部件具 、與刀片保持座在進入位置與退避位置之間移動的路徑 交又的方向上傾斜於上述刀片保持座的引導面能夠在與 15刀片保持座移動的路徑交又的方向上移動地設置在上述底 匕爲了調整刀片保持座的高度，通過使調整部件 角位移能夠調整刀片保持座的高度，由此，即使是挺針板 下，面與彎針上表面之間狹窄的空間，也能夠容易並且準 確地將刀片保持座的高度位置調整到所希望的位置上使 調整部件不與其周®的其他零部件干涉。 20圖式簡單說明 it的洋細说明和附圖，本發明的目的、特徵和 優點應該能夠更加明瞭。 ’ 第1圖爲本發明的一個實施形態的縫切機的紗線切斷 裝置的分解立體圖。 200934906 第2圖爲紗線切斷震置的省略了 一部分零部件的俯視 圖。 第3圖爲表示高度調整部的結構的俯視圖。 第4圖爲從第3圖的剖面線!v_jv看去的放大剖視圖。 5 第5圖爲調整部件的放大俯視圖。 第6圖爲從第5圖的剖面線VI-VI看去的放大剖視圖。 第7圖爲從第5圖的剖面線看去的放大剖視圖。 ❹20 According to the present invention, when the sewing operation is stopped, the driving lever is angularly displaced in the advancing direction to advance the movable blade, and the upper thread is captured by the yarn catching portion provided at the top end, and the bottom thread is stitched; the shaft is displaced in the backward direction to make the movable blade The yarn catching portion moves from the entry position to the retracted position in a state where the yarn catching portion holds the upper thread and the sewn bottom thread, and the movable blade and the fixed blade cooperate to cut the upper thread and the sewing bottom thread, and then the blade holder driving unit makes the blade holder Continue to retract the angular position to retract the blade holder to the retracted position. Since the entry position and the retreat displacement and the entry position and the retracted position can adjust the height position of the blade holder to the most suitable position by the height adjustment portion, the height adjustment portion can adjust the twist of the blade holder. a movable blade that can enter and exit in a narrow space between the lower surface of the needle plate and the upper surface of the looper is disposed at a position that does not contact any one of the lower surface of the needle plate and the upper surface of the needle. The guide yarn 5 is surely caught by the guide 5 yarn portion of the movable blade to cut it. Further, in the invention, it is preferable that the height adjustment portion has an adjustment member having a guide surface 'i inclined to the blade holder in a direction intersecting with a path in which the blade holder moves between the entry position and the retracted position. A moving ground 10 is disposed on the base in a direction in which the path of the blade holder moves. Since the height adjusting portion has an adjusting member, the adjusting member has a guiding surface that is inclined to the blade holder in a direction in which the blade holder moves between the entering position and the retracted position, and can be held at 15 blades. The movement path of the seat is movably disposed in the direction of the above-mentioned bottom. In order to adjust the height of the blade holder, the height of the blade holder can be adjusted by angular displacement of the adjustment member, thereby even the needle plate, the surface and The narrow space between the upper surfaces of the looper can also easily and accurately adjust the height position of the blade holder to the desired position so that the adjustment member does not interfere with other parts of the circumference®. BRIEF DESCRIPTION OF THE DRAWINGS The purpose, features, and advantages of the present invention will become more apparent. Fig. 1 is an exploded perspective view of the yarn cutting device of the slitter according to the embodiment of the present invention. 200934906 Fig. 2 is a plan view of a part of the components omitted for the yarn cutting operation. Fig. 3 is a plan view showing the structure of the height adjusting portion. Fig. 4 is an enlarged cross-sectional view as seen from the section line !v_jv of Fig. 3. 5 Figure 5 is an enlarged plan view of the adjustment components. Fig. 6 is an enlarged cross-sectional view taken along line VI-VI of Fig. 5. Fig. 7 is an enlarged cross-sectional view as seen from the hatching of Fig. 5. ❹
第8圖爲表不可動刀片移動到前進位置的狀態的俯視 圖。 1〇第9圖爲表示可動刀片移動到退避位置的狀態的俯視 圖。 第10圖爲表示可動刀片移動到退避位置時的縫合底線 的張設狀態的俯視圖。 【貧施方式】 15具體實施方式 下面以附圖作參料細地說明本㈣的優選實施形 態0 第1圖爲本發月的一個實施形態的縫幼機的紗線切斷 裝置40的分解立體圖，第2圖爲紗線切斷裝置40的省略了-2〇部分零部件的俯視圖。在雙重環縫縫喊或扁平縫縫幼機 的底座内 乍業者—側看去設置有配置在具有落針 部31的挺針板附沒有表示财方、俯視鱗爲環行運動 軌跡32(參照後述㈣_)地沿前財向ai和後退方向μ 作搖擺運動㈣針33,在料針33的被㈣物進給 7 200934906 的下游一側（第2圖的上方）’設置有本實施形態的紗線切斷 裝置40。 上述紗線切斷裝置40包括可動刀片2、驅動桿4、固定 刀片5、可動刀片壓簧6、夾線板7、擠壓彈簧20、壓簧調節 5片8以及高度調整部41。可動刀片2在頂端具有捕捉面線和 縫合底線T(參照第10圖）的彎鈎形紗線捕捉部2a(參照第8 圖）’能夠在該紗線捕捉部2a進入挺針板與彎針33之間的第 8圖所示的前進位置與上述彎針33沿運動軌跡32向後退方 向A2退避到第2圖所示的後退位置之間往復移動。驅動桿4 10的長度方向的中央部位用帶肩螺栓3轴支在底座1上，在連 接在其長度方向的一端上的氣壓缸等伸縮驅動源（圖中沒 有示出）的驅動下，以上述帶肩螺栓3的轴心爲支點沿箭頭 Cl、C2所示的角位移方向進行角位移。 當縫製動作結束後，可動刀片2從第8圖的前進位置沿 15箭頭A2的方向移動到第2圖的後退位置時，固定刀片5與可 動刀片2協調作用，將被紗線捕捉部2a捕捉到的面線和縫合 底線T切斷。可動刀片壓簧6配置在固定刀片5的下方，從可 動刀片2對固定刀片5施加擠壓力。失線板7彈性地將被切斷 的縫合底線T的端部夾持在夾線板與可動刀片2的頂端部之 2〇間。擠壓彈簧20彈性地將炎線板7的頂端擠壓向可動刀片2 -侧。壓簧調節片8配置在該擠壓彈簧2〇的下部，利用向上 彎曲的端部擠壓擠壓彈簧20的頂端附近，調整彈力。高度 調整部41設置在上述底座1上，使上述刀片保持座U向靠二 挺針板並且離開贊針的上細或遠離挺針板並且靠近彎針 200934906 • 33的下方D2移動。 第3圖爲表示高度調整部41的結構的俯視圖，第4圖爲 — 從第3圖的剖面線IV-IV看的放大剖視圖，第5圖爲調整部件 46的放大俯視圖’第6圖爲從第5圖的剖面線νι_νι看去的放 5大剖視圖’第7圖爲從第5圖的剖面線W-W看去的放大剖視 圖。上述高度調整部41包括近似τ字形的調整部件46、安裝 螺栓47和鎖緊螺栓48，所述調整部件46在根部形成軸孔 42，在自由端形成圓弧形的引導長孔43和通孔44，在根部 ® 和自由端間的中間部位形成有引導傾斜面45 ;所述安裝螺 10栓47的軸部穿插過調整部件46的軸孔42而被擰緊到底座1 上，使調整部件46圍繞垂直於底座丨的軸線47A沿箭頭E1、 E2的方向轉動自由地將調整部件46連接到底座1上；所述鎖 緊螺栓48的軸部穿插過上述引導長孔43而被擰緊在底座1 上，將調整部件46固定在繞上述軸線47A周圍形成上述引導 15長孔43的範圍内任意角度位移的位置上。 參上述底座1上形成有供上述調整部件46在箭頭Ει、E2 彳向自由地進行角位移地嵌人的收容凹陷部49。該收容凹 陷部49離底座！的一個表面的深度大致與上述調整部件 的厚度相等’收容到收容凹陷部49中的調整部件46的表面 2G與底座1的—個表面大致成制-辨面，使驢部件46無 論角位移到什麼位置都不會突出於底座M —個表面，不僅 避免了與周圍部件的干涉，而且達到了節省空間的目的。 如第1圖、第5圖、第6圖和第7圖所示，上述引導傾斜 面45沿角位移方㈣、E2中的一個角位移方向別向下— 9 200934906 即向靠近底座1的方向傾斜地形成。這樣的引導傾斜面45與 上述連接部件22的下表面點接觸或線接觸，在與調整部件 46的角位移位置相對應的高度位置上支援著。因此，通過 改變調整部件46的角位移位置，能夠使一個連接部件22的 5高度改變’由該連接部件22高度的變化使刀片保持座13向 上方D1或下方〇2移動，能夠調整可動刀片2、固定刀片5和 夾線板7的高度位置。 上述可動刀片安裝台1〇通過螺栓9固定在上述可動刀 片2根部的下面。該可動刀片安裝台10能夠滑動地支援在用 10帶肩螺栓11和碟形彈簧ΠΑ以及螺栓12固定在底座1上的刀 片保持座13的長孔13a内。並且，可動刀片安裝台1〇的中間 部位通過從下面插入上述驅動桿4的長度方向的另一端形 成的長孔4a以及刀片保持座13上沿前後方向八卜A2直線形 成的長孔13a内的帶肩螺栓14被連接到驅動桿4的長度方向 15的另知上，能夠與驅動桿4沿角位移方向〇：1、C2的移動 相連動使可動刀片2沿長孔13a在前後方向八卜入2上直線地 在復移動。 上述固定刀片5配置在可動刀片2的上面，通過貫穿固 定刀片5上沿前後方向延伸形成的長孔5a的2根螺栓16與固 2〇定刀片引導部件15一起固定在上述刀片保持座13上。在上 述2根螺栓16的橫旁，設置有貫穿上述長孔5a和上述可動刀 片壓簧6上形成的長孔6a，並且貫穿刀片保持座13向下方突 出，其突出的端部螺合連接到上述刀片保持座13上的調節 螺栓17。 200934906 通過調節該調節螺栓17的擰緊量使上述刀片保持座13 的頂端附近向上下撓曲，由此使上述可動刀片壓簧6向上下 方向撓曲，能夠調整可動刀片2對固定刀片5的擠壓力。 5 10 15 ❹ 20 並且，在上述夾線板7的另一端上形成有沿前後方向 Α卜Α2延伸的長孔7a ’通過貫穿該長孔％的螺栓19將擠壓 彈簧20固定在上述刀片保持座13上，通過鬆開上述螺栓19 能夠沿長孔7a調整夹線板7的前後位置。 在上述底座1上驅動桿4的兩側，配置有長短2個連接部 件21、22。這些連接部件21、22的長度方向的一端用帶肩 螺栓23、24通過碟形彈簧23A、24八圍繞各螺栓的軸線角位 移自由地樞支在底座丨上。各連接部件21、22的長度方向的 另一端用帶肩螺栓Π和螺栓12樞支、連接在刀片保持座13 的前後2個地方上，由底座1、各連接部件21、22和刀片保 持座13構成四邊形連接機構。由於各連接部件21、22用帶 肩螺栓23、24通過碟形彈簧μα、24A設置在底座1上，因 此利用刀片保持座13的引導傾斜面45允許沿上下方向移 動，能夠一直保持將刀片保持座13彈性擠壓到底座丨一側的 狀態。 固定螺栓18貫穿刀片保持座13和壓簧調節片8根部形 成的彎曲部的上部分向下突出。固定螺栓18橫旁的調節螺 釘18a貫穿上述刀片保持座13向下突出，該突出端擰入上述 壓簧調節片8大致中央部位形成的螺紋孔中。 通過調節上述調節螺釘18a，能夠用上述壓簧調節片8 上方彎曲的前端部擠壓擠壓彈簧2〇的頂端附近，調整擠壓 11 200934906 彈簧20對夾線板7的擠壓力。 · 通過使各連接部件21、22進行角位移，能夠使保持可 ， 動刀片2、固定刀片5、固定刀片引導部件15、可動刀片壓 簧6、夾線板7和壓簧調節片8的刀片保持座13在第2圖和第8 - 5圖所示的靠近上述挺針板和彎針33的前進方向八丨的進入位 置、與第9圖和第1〇圖所示的從上述進入位置向斜後方後退 的退避位置之間位移。 在上述各連接部件21、22中的長的—根連接部件21的 中間部位的左側部分，形成有向驅動桿4一側突出的隆起部 ❹ 10 21b，當可動刀片2與固定刀片5協調作用下將紗線切斷後、 驅動桿4繼續向後退方向A2進行角位料，該驅動桿4與長 的一根連接部件21的隆起部21b相抵接，擠壓上述一根連接 部件21，使各連接部件21、22與驅動桿4連動而進行角位 移，使刀片保持座13從第2圖和第8圖所示的進入位置經由 I5第9圖的箭頭e—f所示的移動路徑(路線)擺動到第1〇圖所示 的退避位置；在下—個縫製動作後切斷紗線時，刀片保持 座13隨著驅動桿4向前進一側的角位移方向〇進行的角位 Ο 移經由第9圖所不的箭頭e_f所示的移動路徑(路線）回到第 2圖和第8圖所示的進入位置。 2〇 並且，在上述長的一根連接部件21的中間部位，形成 有穿插螺栓25的軸部的長孔2ia，用螺栓25和墊圈26固定在 _ 底座1上的帶肩襯套27的例如偏心輪狀臺階部分嵌合在該 長孔21a内，該臺階部分與長孔21a的後退方向八2下游一側 (第8圖的右側）的内周面部分相抵接，由此阻止上述刀片保 12 200934906 , #座13向進人位置的擺動位移，通過使上述帶肩襯套27圍 ，堯螺栓25的轴、轉動，能夠用該偏心輪狀臺階部調節進入 停止位置。 ❿且，在上❹讀另—個連接部件22與底座1之間張設 5有向刖進方向A1彈性拉動刀片保持座⑽拉伸螺旋彈簧 29。在將上述短的另—個連接料22的另—魅支、連接 在刀片保持座13上的螺栓12與刀片保持座13之間設置有偏 心、襯套28，通過使該偏心襯套28繞螺栓12的軸心旋轉，能 触調刀>}歸座13相對於挺針板和彎針33的進入位置和 10退避位置’能夠確實地防止可動刀片2捕捉縫合底線的捕捉 錯誤。 下面忒明上述結構的紗線切斷裝置4 〇進行紗線剪切動 作及其後的退避動作和下一次縫製動作。 如第2圖所不，在縫製動作剛剛結束之後，保持可動刀 15片2、固定刀片5和夾線板7等的刀片保持座13配置在靠近挺 驗#板和彎針33的前方(左邊）的進人位置上。在這種狀態下， 當驅動桿4向與前進方向A1相對應的角位移方向C1角位移 時可動刀片女裝台1〇沿刀片保持座13的長孔i3a向前進方 向A1直線移動，可動刀片2像第8圖所示那樣移動到紗線捕 20捉部2a進入到挺針板與彎針33之間的前進位置。 然後，驅動桿4向與後退方向A2相對應的角位移方向 C 2角位移’使可動刀片2沿與往前移動時相同的軌跡向後退 方向A2直線移動，在即將回到第2圖所示的後退位置之前， 被紗線捕捉部2a捕捉到的面線和縫合底線τ被與固定刀片5 13 200934906 的協調作用切斷。該被切斷的各線端中的縫合底線τ的端部 被彈性夾持在可動刀片2的頂端與夹線板7之間。 在這樣切斷紗線時，由於可動刀片2 、固定刀月5和央 線板7用而度調整部41被調整在靠近彎針33的最合適的高 5度的進入位置，因此能夠用可動刀片2確實地捕捉面線和縫 合底線’能夠縮短被縫製物中的面線和縫合底線Τ的殘留長 度，能夠進行良好的縫製精加工。 在上述紗線切斷和線端夾持後，驅動桿4繼續向角位移 方向C2角位移。該角位移時驅動桿4與長的連接部件刀的隆 ◎ 10起部21b相抵接’推擠該連接部件21，由此，各連接部件21、 22克服麼縮螺旋彈簧29的彈力向角位移方向C2角位移，刀 片保持座13經由第9圖的箭頭e_f所示的移動路徑(路線)像 第10圖所不那樣退避到挺針板和彎針33的斜後方的退避位 置。 15 在這種刀片保持座13退避到偏移位置上的狀態下，開 始下一個縫製動作。在豸開始時，由於可動刀片2、固定刀 片5和夾線板7各自的頂端像第1〇圖所示那樣離開彎針33的 υ 運動軌跡32在斜後方的值置上，因此它們不會干涉彎針33 等的動作。 ° 並且’在上述紗線剪切過程中端部被彈性夾持在可動 刀片2的頂端與夾線板7之間的縫合底線τ，像第1〇圖所示那 樣不重整在彎針33的上方，處於傾斜張掛在彎針Μ與被爽 持在可動刀片2的頂端與可動刀片壓簧6之間的線端之間的 狀態，由縫合底線τ確實地形成大的三角形區域s。 14 200934906 因此，不管使用的縫合底線τ的種類等如何，下一次縫 製動作開始時都能使向落針部31下降的縫幼針確實地移入 缝合底線τ的三角形區域s ’能夠防止跳線的産生，能夠形 成所希望的良好的針跡。 5 而且，在上述可動刀片2、固定刀片5和夾線板7的頂端 配置在偏離挺針板和彎針33的位置上的狀態下，由於能夠 確保，彎針33的紗線孔周邊足夠寬的空間，因此將缝合底線τ 穿入該紗線孔的穿紗作業不會受挺針板和各刀片2、5等的 干擾，能夠容易地進行。 10 而且，在使刀片保持座13向斜後方的退避位置偏移移 動時，由於使用由各連接部件21、22構成的四邊形連接， 因此與利用由長孔和與其相卡合的螺栓之間的滑動産生的 引導作用使刀片保持座偏移移動時相比，不僅能夠牢固地 支援刀片保持座13，減少晃蕩的產生，而且能夠防止過負 15載集中作用到螺栓等滑動引導部件上引起破損或變形等， 能夠達到提高紗線切斷裝置4〇的耐久性和使切斷後的紗端 的彈性夾持功能穩定化的目的。 另外’雖然本發明的紗線切斷裝置作爲扁平縫縫紉機 或雙重環縫縫紉機中的紗線切斷裝置使用特別有效，但也 20 可以作爲除此以外的各種形態的縫紉機的紗線切斷裝置使 用。 並且’雖然上述實施形態說明了在構成四邊形連接的 一個連接部件21的中間部位的一個側邊部分、形成向驅動 桿4一側突出的隆起部21b，使驅動桿4抵接在該隆起部21b 15 200934906 上擠壓一個連接部件21的結構，但隆起部21b不一定非要不 可，也可以使驅動桿4直接抵接在連接部件21的一側，或者 在驅動桿4上設置與連接部件21相抵接的凸起部或銷等。 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，上述實施形態的所有點只是一個示例，本 發明的範圍爲如申請專利範圍的範圍，不受說明書文本的 任何約束。而且’屬於如申請專利範圍内的變形或變更全 部爲本發明的範圍。 【圖式簡软》明】 10 15 第1圖爲本發明的一個實施形態的縫紉機的紗線切斷 裝置的分解立體圖。 第2圖爲紗線切斷裝置的省略了-部分零部件的俯視 圖。 第3圖爲表示高度調整部的結構的俯視圖。 第4圖爲從第3圖的剖面線IV-IV看去的放大剖視圖。 第5圖爲調整部件的放大俯視圖。 圖 6圖爲從第5圖的剖面線VI-VI看去的放大剖視圖。 第7圖爲從第5圖的剖面__料細放大剖視圖。 第圖爲表不可動刀片移動到前進位置的狀態的俯視 刀片移動到退避位置的狀態的俯視 第9圖爲表示可動 圖。 第10圖爲表示可叙” μ你^ 動刀片移動到退避位置時的縫合底線 的張設狀態的俯視圖。 - 20 200934906 ❹ 〇 【主要元件符號說明 1…底座 14…帶肩螺栓 2…可動刀片 15…引導部件 2a…紗線捕捉部 16…螺检 3…帶肩螺栓 17…調節螺栓 4"·驅動桿 18…螺栓 4a…長孔 18a…螺釘 5·· ·固定刀片 19…螺栓 5a…長孔 20…彈簧 6···刀片壓簧 2卜22…連接部件 6a…長孔 21a…長孔 7…夾線板 21b…隆起部 7a…長孔 23、24…帶肩螺栓 8···壓簧調節片 23A、24A…碟形彈簧 9…螺栓 25…螺检 10…刀片安裝台 26…塾圈 11…螺栓 27…帶肩襯套 11A···碟形彈簧 28…偏心概套 12…螺栓 29…螺旋彈簧 13···刀片保持座 31…落針部 13a.··長孔 32...運動 17 200934906 33···彎針 Α1···前進方向 40…紗線切斷裝置 Α2…後退方向 41…高度調整部 Β…方向 42…轴孔 a、C2···位移方向 43"·長孔 D1"·上方 44…通孔 D2···下方 45···傾斜面 E卜E2…角位移方向 #| 46…調整部件 T…縫合底線 47,48…螺栓 S…三角形區域 47Α…轴線 49…凹陷部 e f···箭頭 18Fig. 8 is a plan view showing a state in which the non-movable blade is moved to the forward position. Fig. 9 is a plan view showing a state in which the movable blade is moved to the retracted position. Fig. 10 is a plan view showing a state in which the suture bottom line is stretched when the movable blade is moved to the retracted position. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded view of a yarn cutting device 40 of a slitting machine according to an embodiment of the present invention. FIG. 2 is a plan view of a part of the yarn cutting device 40 in which the -2 〇 part is omitted. In the base of the double-ring seaming or flat-stitching machine, the side is placed on the side with the needle-needle plate provided with the needle-dropping portion 31, and the circular motion track 32 is not shown. (4) _) The grounding direction ai and the backward direction μ are oscillated (four) needles 33, and the downstream side (the upper side of FIG. 2) of the (four) material feed 7 200934906 of the needle 33 is provided with the present embodiment. Yarn cutting device 40. The yarn cutting device 40 includes a movable blade 2, a driving lever 4, a fixed blade 5, a movable blade compression spring 6, a tension plate 7, a pressing spring 20, a compression spring adjustment 5, and a height adjusting portion 41. The movable blade 2 has a hook-shaped yarn catching portion 2a (refer to Fig. 8) at which the capturing surface line and the sewing bottom line T (see Fig. 10) are inserted at the tip end, and can enter the needle plate and the looper at the yarn catching portion 2a. The forward position shown in Fig. 8 between 33 and the looper 33 reciprocate in the backward direction A2 in the backward direction A2 along the motion locus 32 to the retracted position shown in Fig. 2 . The center portion of the drive rod 4 10 in the longitudinal direction is pivotally supported on the base 1 by a shoulder bolt 3, and is driven by a telescopic drive source (not shown) such as a pneumatic cylinder connected to one end in the longitudinal direction thereof. The axial center of the shoulder bolt 3 is angularly displaced as a fulcrum in the angular displacement direction indicated by arrows C1 and C2. When the movable blade 2 is moved from the forward position of Fig. 8 in the direction of arrow A2 to the retracted position of Fig. 2 after the sewing operation is completed, the fixed blade 5 cooperates with the movable blade 2 to be caught by the yarn catching portion 2a. The upper thread and the suture bottom line T are cut off. The movable blade compression spring 6 is disposed below the fixed blade 5, and a pressing force is applied from the movable blade 2 to the fixed blade 5. The wire-breaking plate 7 elastically clamps the end portion of the cut sewing bottom thread T between the tension plate and the tip end portion of the movable blade 2. The pressing spring 20 elastically presses the tip end of the ray plate 7 toward the movable blade 2 side. The compression spring regulating piece 8 is disposed at a lower portion of the pressing spring 2, and presses the vicinity of the tip end of the pressing spring 20 with the end portion bent upward to adjust the elastic force. The height adjusting portion 41 is provided on the above-mentioned base 1 such that the above-mentioned blade holder U moves toward the lower needle plate and away from the fine needle of the needle or away from the needle plate and near the lower side D2 of the looper 200934906 • 33. Fig. 3 is a plan view showing a configuration of the height adjusting portion 41. Fig. 4 is an enlarged cross-sectional view taken along line IV-IV of Fig. 3, and Fig. 5 is an enlarged plan view of the adjusting member 46. Fig. 6 is a view Fig. 7 is a cross-sectional view taken along line νι_νι of Fig. 5, and Fig. 7 is an enlarged cross-sectional view taken along line WW of Fig. 5. The height adjustment portion 41 includes an adjustment member 46 having an approximately τ shape, a mounting bolt 47, and a lock bolt 48. The adjustment member 46 forms a shaft hole 42 at the root portion, and forms a circular guide hole 43 and a through hole at the free end. 44, a guiding inclined surface 45 is formed at an intermediate portion between the root portion and the free end; the shaft portion of the mounting screw 10 pin 47 is inserted through the shaft hole 42 of the adjusting member 46 and is screwed to the base 1, so that the adjusting member 46 The adjusting member 46 is rotatably coupled to the base 1 in a direction perpendicular to the axis 47A of the base 沿 in the directions of the arrows E1, E2; the shaft portion of the locking bolt 48 is inserted through the guiding elongated hole 43 and is screwed to the base 1 Upper, the adjustment member 46 is fixed at a position displaced at an arbitrary angle within a range in which the guide hole 15 is formed around the axis 47A. The housing base 1 is formed with a housing recess 49 into which the adjustment member 46 is freely angularly displaced by arrows Ε, E2. The receiving recess 49 is away from the base! The depth of one surface is substantially equal to the thickness of the above-mentioned adjusting member. The surface 2G of the adjusting member 46 accommodated in the receiving recess portion 49 is substantially formed and distinguished from the surface of the base 1, so that the cymbal member 46 is angularly displaced. No position will protrude from the surface of the base M, which not only avoids interference with surrounding components, but also saves space. As shown in FIG. 1 , FIG. 5 , FIG. 6 and FIG. 7 , the above-mentioned guiding inclined surface 45 is displaced in the direction of one of the angular displacements (4) and E2, and is downwardly oriented to the direction of the base 1 . Formed obliquely. Such a guiding inclined surface 45 is in point contact or line contact with the lower surface of the connecting member 22, and is supported at a height position corresponding to the angular displacement position of the adjusting member 46. Therefore, by changing the angular displacement position of the adjusting member 46, the height 5 of one connecting member 22 can be changed 'the movement of the blade holder 13 to the upper D1 or the lower jaw 2 by the change in the height of the connecting member 22, and the movable blade 2 can be adjusted. , the height position of the fixed blade 5 and the clamping plate 7. The movable blade mounting table 1 is fixed to the lower surface of the movable blade 2 by bolts 9. The movable blade mounting table 10 is slidably supported in the long hole 13a of the blade holder 13 which is fixed to the base 1 by the shoulder bolt 11 and the disk spring ΠΑ and the bolt 12. Further, the intermediate portion of the movable blade mounting table 1 is inserted into the long hole 4a formed at the other end in the longitudinal direction of the drive rod 4 from below, and the long hole 13a formed in the blade holder 13 in the front-rear direction. The shoulder bolt 14 is connected to the length direction 15 of the drive rod 4, and can be coupled with the movement of the drive rod 4 in the angular displacement direction 〇:1, C2 so that the movable blade 2 is along the long hole 13a in the front-rear direction. Move in 2 in a straight line. The fixed blade 5 is disposed on the upper surface of the movable blade 2, and is fixed to the blade holder 13 by two bolts 16 penetrating through the long holes 5a formed in the front-rear direction on the fixed blade 5 together with the fixed blade guiding member 15. . A long hole 6a formed through the long hole 5a and the movable blade compression spring 6 is provided laterally of the two bolts 16, and protrudes downward through the blade holder 13, and the protruding end portion thereof is screwed to The above-mentioned blade holder 13 is provided with an adjusting bolt 17. 200934906 By adjusting the tightening amount of the adjusting bolt 17, the vicinity of the tip end of the blade holder 13 is deflected upward and downward, thereby causing the movable blade compression spring 6 to flex in the up-down direction, and the pressing of the movable blade 2 against the fixed blade 5 can be adjusted. pressure. 5 10 15 ❹ 20 Further, on the other end of the above-mentioned wire clamping plate 7, an elongated hole 7a extending in the front-rear direction Α 2 is formed. The pressing spring 20 is fixed to the above-mentioned blade by a bolt 19 penetrating the long hole %. On the seat 13, the front and rear positions of the wire holding plate 7 can be adjusted along the long hole 7a by loosening the above-mentioned bolts 19. On both sides of the drive lever 4 on the base 1, two connecting members 21 and 22 are disposed. One end of the connecting members 21, 22 in the longitudinal direction is pivotally supported on the base cymbal by the shoulder bolts 23, 24 by the disc springs 23A, 24 around the axial direction of each bolt. The other end of each of the connecting members 21, 22 in the longitudinal direction is pivotally supported by a shoulder bolt Π and a bolt 12, and is attached to the front and rear of the blade holder 13, and the base 1, the connecting members 21, 22, and the blade holder 13 constitutes a quadrilateral connection mechanism. Since the respective connecting members 21, 22 are provided on the base 1 by the shoulder springs 23, 24 by the disc springs μα, 24A, the guide inclined surface 45 by the blade holder 13 is allowed to move in the up and down direction, and the blade can be kept maintained at all times. The seat 13 is elastically pressed to the side of the base. The fixing bolt 18 projects downward through the upper portion of the curved portion formed by the blade holder 13 and the root portion of the compression spring regulating piece 8. The adjusting screw 18a laterally of the fixing bolt 18 projects downward through the blade holder 13, and the protruding end is screwed into a screw hole formed at a substantially central portion of the pressing spring regulating piece 8. By adjusting the above-described adjusting screw 18a, it is possible to press the vicinity of the tip end portion of the pressing spring adjusting piece 8 above the pressing end portion of the pressing spring 2 to adjust the pressing force of the spring 11 against the wire holding plate 7. · By angularly displacing the respective connecting members 21, 22, the blades holding the movable blade 2, the fixed blade 5, the fixed blade guiding member 15, the movable blade compression spring 6, the wire clamping plate 7, and the compression spring regulating blade 8 can be made The holding seat 13 is in the entering position of the gossip in the advancing direction of the needle jack plate and the looper 33 shown in Figs. 2 and 8 - 5, and from the above entering position shown in Fig. 9 and Fig. 1 Displaces between the retracted positions that are retracted to the rear. In the left side portion of the intermediate portion of the long-root connecting member 21 among the above-described connecting members 21, 22, a ridge portion 10 21b protruding toward the side of the driving rod 4 is formed, and the movable blade 2 cooperates with the fixed blade 5 After the yarn is cut, the drive rod 4 continues to be in the backward direction A2, and the drive rod 4 abuts against the raised portion 21b of the long one connecting member 21, and the one connecting member 21 is pressed to make each The connecting members 21 and 22 are angularly displaced in conjunction with the driving lever 4, and the blade holder 13 is moved from the entering position shown in FIGS. 2 and 8 via the arrow e-f of FIG. 9 of FIG. The swinging position is shifted to the retracted position shown in Fig. 1; when the yarn is cut after the next sewing operation, the angular position of the insert holder 13 in the angular displacement direction of the drive lever 4 toward the forward side is shifted. The movement path (route) indicated by the arrow e_f shown in Fig. 9 returns to the entry position shown in Figs. 2 and 8. Further, in the intermediate portion of the long one connecting member 21, an elongated hole 2ia through which the shaft portion of the bolt 25 is inserted is formed, and the shoulder bushing 27 fixed to the base 1 by the bolt 25 and the washer 26 is, for example, The eccentric wheel step portion is fitted into the long hole 21a, and the step portion abuts against the inner peripheral surface portion of the downstream side (the right side of FIG. 8) of the long hole 21a in the backward direction VIII, thereby preventing the blade from being protected 12 200934906, the swinging displacement of the #13 seat toward the entering position, by enclosing the shoulder bushing 27, the shaft of the bolt 25, and the rotation, can be adjusted to enter the stop position by the eccentric step portion. Further, a tension coil spring 29 is elastically pulled by the blade holder (10) in a directionwise direction A1 between the upper connecting member 22 and the base 1. An eccentric bushing 28 is disposed between the bolt 12 of the short other connecting material 22 and the bolt 12 attached to the blade holder 13 and the blade holder 13 by winding the eccentric bushing 28 The axis of rotation of the bolt 12, the reachable knife > the entry position of the seat 13 with respect to the needle plate and the looper 33, and the 10 retracted position ' can surely prevent the movable blade 2 from catching the catching error of the stitching bottom line. Next, the yarn cutting device 4 of the above configuration will be described, and the yarn cutting operation and the subsequent retracting operation and the next sewing operation will be performed. As shown in Fig. 2, immediately after the sewing operation is completed, the blade holder 13 holding the movable blade 15 piece 2, the fixed blade 5, the tension plate 7 and the like is disposed in front of the aligning plate #31 and the looper 33 (left side) ) Enter the position. In this state, when the drive lever 4 is angularly displaced in the angular displacement direction C1 corresponding to the advancing direction A1, the movable blade table 1 is linearly moved in the advancing direction A1 along the long hole i3a of the blade holder 13, the movable blade 2, as shown in Fig. 8, moves to the yarn catching and catching portion 2a to enter the forward position between the needle plate and the looper 33. Then, the drive lever 4 is angularly displaced in the angular displacement direction C 2 corresponding to the backward direction A2. The movable blade 2 is linearly moved in the backward direction A2 along the same trajectory as when moving forward, and is returned to FIG. 2 Before the retreat position, the upper thread and the sewing bottom line τ captured by the yarn catching portion 2a are cut off by the cooperation of the fixed blades 5 13 200934906. The end portion of the sewn bottom thread τ in each of the cut ends is elastically held between the tip end of the movable blade 2 and the wire holding plate 7. When the yarn is cut in this way, since the movable blade 2, the fixed blade 5, and the center plate 7 are adjusted, the adjustment portion 41 is adjusted to an optimum height of 5 degrees toward the looper 33, so that the movable blade can be used. (2) The surface line and the suture bottom line are reliably captured. The remaining length of the upper thread and the sewn bottom thread can be shortened, and good sewing finishing can be performed. After the above yarn cut and line end gripping, the drive rod 4 continues to angularly shift in the angular displacement direction C2. When the angular displacement is made, the drive lever 4 abuts against the upper portion 10b of the long connecting member blade to push the connecting member 21, whereby the connecting members 21, 22 are angularly displaced against the elastic force of the contraction coil spring 29. In the direction C2 angular displacement, the blade holder 13 is retracted to the retracted position obliquely rearward of the needle plate and the looper 33 as shown in Fig. 10 via the movement path (route) indicated by the arrow e_f in Fig. 9 . 15 In the state where the blade holder 13 is retracted to the offset position, the next sewing operation is started. At the start of the boring, since the respective tips of the movable blade 2, the fixed blade 5, and the tension plate 7 are separated from the meandering motion path 32 of the looper 33 as shown in Fig. 1, they are not Interference with the action of the looper 33 or the like. ° and 'the stitching bottom line τ whose end portion is elastically held between the tip end of the movable blade 2 and the wire holding plate 7 during the yarn cutting process described above, is not reformed in the looper 33 as shown in Fig. 1 The upper portion is in a state of being inclined between the looper and the line end held between the tip end of the movable blade 2 and the movable blade compression spring 6, and the large triangular region s is surely formed by the stitching bottom line τ. 14 200934906 Therefore, regardless of the type of the sewing bottom line τ or the like, the sewing needle which is lowered toward the needle dropping portion 31 can be surely moved into the triangular region s ' of the sewing bottom line τ at the start of the next sewing operation, thereby preventing the jumper Produced, it is possible to form a desired good stitch. Further, in a state where the distal end of the movable blade 2, the fixed blade 5, and the tension plate 7 is disposed at a position deviated from the needle plate and the looper 33, it is ensured that the periphery of the yarn hole of the looper 33 is sufficiently wide. Therefore, the threading operation for penetrating the sewing thread τ into the yarn hole is not easily disturbed by the needle plate and the blades 2, 5, etc., and can be easily performed. Further, when the blade holder 13 is shifted in the retracted position obliquely rearward, since the quadrangular connection constituted by the respective connecting members 21 and 22 is used, it is used between the long hole and the bolt engaged therewith. The guiding action by the sliding can not only firmly support the blade holder 13 but also reduce the occurrence of sloshing, and prevent the excessive negative load from being concentrated on the sliding guide member such as a bolt to cause breakage or The purpose of improving the durability of the yarn cutting device 4 and the elastic gripping function of the yarn end after cutting can be achieved by deformation or the like. In addition, the yarn cutting device of the present invention is particularly effective as a yarn cutting device in a flat sewing machine or a double loop sewing machine, but it can also be used as a yarn cutting device for various types of sewing machines. use. Further, the above embodiment has described that the one side portion of the intermediate portion of the one connecting member 21 that is connected in a quadrangular shape forms a raised portion 21b that protrudes toward the driving rod 4, and the driving rod 4 abuts against the raised portion 21b. 15 200934906 The structure of one connecting member 21 is pressed up, but the ridge portion 21b is not necessarily required, and the driving rod 4 may be directly abutted on one side of the connecting member 21, or the connecting member 21 may be provided on the driving rod 4. Abutment or pin or the like. The present invention can be embodied in other various forms without departing from the spirit or essential characteristics thereof. Therefore, all the points of the above-described embodiments are only an example, and the scope of the present invention is intended to be within the scope of the appended claims. Further, all modifications or alterations within the scope of the invention are intended to be within the scope of the invention. [Fig. 1] Fig. 1 is an exploded perspective view of the yarn cutting device of the sewing machine according to the embodiment of the present invention. Fig. 2 is a plan view showing a part of the yarn cutting device omitted. Fig. 3 is a plan view showing the structure of the height adjusting portion. Fig. 4 is an enlarged cross-sectional view taken along line IV-IV of Fig. 3. Figure 5 is an enlarged plan view of the adjustment member. Fig. 6 is an enlarged cross-sectional view taken along line VI-VI of Fig. 5. Fig. 7 is a schematic enlarged cross-sectional view taken along the line __ of Fig. 5. The first view is a plan view showing a state in which the non-movable blade is moved to the forward position. FIG. 9 is a plan view showing a state in which the blade is moved to the retracted position. Fig. 10 is a plan view showing the state in which the suture bottom line of the movable blade moves to the retracted position. - 20 200934906 ❹ 〇 [Main component symbol description 1... base 14... shoulder bolt 2... movable blade 15...guide member 2a...yarn catching portion 16...thread check 3...shoulder bolt 17...adjustment bolt 4" drive rod 18...bolt 4a...long hole 18a...screw 5··fixing blade 19...bolt 5a...long Hole 20...spring 6···blade pressure spring 2...22 connecting member 6a...long hole 21a...long hole 7...clamping plate 21b...bumping portion 7a...long hole 23,24...with shoulder bolt 8···pressure Spring adjustment piece 23A, 24A...disk spring 9...bolt 25...thread inspection 10...blade mounting table 26...ring 11...bolt 27...shoulder bushing 11A···disc spring 28...eccentric set 12...bolt 29...coil spring 13···blade holder 31...needle drop portion 13a.·long hole 32...movement 17 200934906 33···bend needle Α1···forward direction 40...yarn cutting deviceΑ2... Retreat direction 41... Height adjustment unit Β... Direction 42... Shaft hole a, C2··· Displacement direction 43"·Long hole D1"·Top 44...Through hole D2···Bottom 45···Slope surface E Bu E2...Angle displacement direction #| 46...Adjustment part T...Sewing bottom line 47,48...Bolt S...Triangle area 47Α...axis 49...depression ef···arrow 18