®周圍進行來回旋動的擺梭、以及使前述擺梭可來回旋動 地在内側保持住前述擺梭的彎鉤者；切線裝置，係可藉由 移動將底線配置於彎鉤裝置上方者；及導線板，係配置於 引述彎鉤上部’並設有於前述切線裝置之可動77部移動時 可捕捉底線的底線固持部者，且該縫紉機之底線固持裝置 之特徵在於：前述底線固持部配置於較縫製時之底線通過 位置更靠近前述梭心匣之底線導出部的位置。 另外，「梭心匣之底線導出部」係指於具有可規定梭心 匣導出之底線路徑的引導機構時，底線脫離該引導機構拘 1項之發明具有 申請專利範圍第2項所記載之發明與第 同樣的構造 ’且前述底線固持部配置於前述梭心便 導出部的上方。 底線 發明之效果 申請專利範圍第1項記載之發明在底線從梭心匣拉出 之狀態下，擺梭藉由其尖端從車針保持住上線，並將其線 :妆至下方。然後，擺梭向反方向旋動，藉由以設置於縫 刀機上之挑線桿拉引上線而使擺梭及梭心匣穿過其線圈 藉此，底線可穿過上線之線圈形成結，而進行縫製。 進行縫製時，底線從梭心匣之底線導出部向形成於縫 紉機針板之針孔呈直線前進，並通過相對於途中 j 大致為一定之底線通過位置。 — 而，於切線裝置切斷底線時，藉由該切線裝置將底線 從底線通過位置移動並保持於底線固持部。此時，由於底 緯係、移動至較底線通過位置更接近底線導出部的底線固持 部，故可減少因該移動而拉出之底線。 因此’切斷後之底線端部不會產生多餘的長度，在下 夂縫製時’可抑制線張力產生變動，並可形成良好的結。 藉此，可提升開始縫製時之縫製品質。 申请專利範圍第2項記載之發明由於將底線固持部配 置於底線導出部之上方，故可將底線固持部配置地更靠近 底線導出部，於保持底線時，可更減少多餘的底線拉出， 更可提升下次縫製之縫製品質。 【貨方式】 實施發明之最佳型態 (發明之實施型態的全體構造） 根據第1圖至第5圖說明本發明實施型態之彎鉤機構 5〇。第1圖係顯示搭載有彎鉤機構50之縫紉機10的立體圖。 以下，將平行於後述針板11上面、並平行於未圖示之 縫紉機10之彎鉤軸的方向作為γ轴方向，平行於針板。上 面、且垂直於Y軸方向的方向作為X轴方向，垂直於針板u 上面的方向作為Z軸方向，來進行缝紉機各部的說明。 縫紉機10具有全體而言略呈:rr字形的框體2〇，而該框 體20包含：床板部21 ’係位於框體20下部者；省略圖示之 縱躯部’係從床板部21之一端部立起者；及臂部22，係從 縱躯部上端與床板部21同方向延伸設置者。 而，在臂部22内，沿著Y軸方向設置有可對保持車針12 之針桿賦予上下移動之驅動力的上轴，在床板部21内，則 沿著Y軸方向設置有可對彎鉤機構50賦予驅動力之彎鉤軸。 上述上軸藉由縫紉機馬達於一定方向進行全旋轉，透 過傳達機構將來回之旋動驅動力傳達至彎鉤軸。藉此，彎 鉤轴可以與車針之上下移動同步或成整數倍之頻率，以幾 乎為半旋轉之範圍反覆進行正方向與反方向的旋動。 第2圖係以沿著γ轴方向之視線看框體20之床板部21 一 端部的側視圖。如圖所示，於床板部21在車針12下側之位 置上設置有針板11，在該針板11上形成有縫製時可穿過車 針12的針孔13。 此外’於針板11之下面側設有切線裝置，更在其下方 以内藏於床板部21之狀態設置彎鉤機構50。 切線裝置包含：可動刀部14 ’係可旋動地被支持於針 板11之下面側者；固定刀部，係將可動刀部14橫切搬運過 來的上線及底線D，夾在與該可動刀部14之間而切斷者；馬 達’係可使可動刀部14往來回方向旋動者；及驅動力傳達 機構，係連結馬達與可動刀部14者。 上述可動刀部14係設定其來回旋動範圍為可沿著針板 11之平板面進行來回旋動，且通過針孔13之垂直下方。 當切斷時，於針孔13穿通有：上線從車針12垂下的部 分、上線在針板下方折返朝向被縫製物的部分、及底線D， 可動刀部14必須從該等中留下上線從車針12垂下的部分， 並且切斷上線在針板下方折返朝向被縫製物的部分與底線 D。 因此’可動刀部14之構造為.於來回旋動之去程中， 1351455 可藉由突起14a僅選出光奴处 並保持住上線從車針12垂下的部 勿，而於回程中，藉由突 ..^ 起4a之反側捕捉上線在針板下方 折返朝向魏製物㈣分與雜運㈣定刀部。 後述之第4圖中，顯示有位於去程與回程間之停止位置 的可動刀部14。此外，在a shuttle that rotates around the ® and a hook that allows the shuttle to hold the shuttle on the inside; the thread cutting device can be configured to move the bottom line over the hook device; And the lead plate is disposed in the upper part of the hook and is provided with a bottom line holding portion that can capture the bottom line when the movable 77 portion of the thread cutting device moves, and the bottom line holding device of the sewing machine is characterized in that the bottom line holding portion is disposed The bottom line passing position at the time of sewing is closer to the position of the bottom line lead-out portion of the bobbin case. In addition, the "bottom line lead-out portion" of the bobbin case refers to the invention described in the second item of the patent application when the guide line having the bottom line path that can be used to define the bobbin thread is removed from the guide mechanism. The bottom line holding portion is disposed above the bobbin case leading portion. Bottom line Effect of the invention According to the invention of the first aspect of the invention, in the state where the bobbin thread is pulled out from the bobbin, the shuttle is held by the stylus from the stylus, and the thread is placed below. Then, the shuttle is rotated in the opposite direction, and the shuttle and the bobbin are passed through the coil by pulling the upper thread with the take-up lever provided on the slitting machine, whereby the bottom thread can form a knot through the coil of the upper thread. And sewing. When the sewing is performed, the bottom thread advances linearly from the bottom thread lead-out portion of the bobbin to the needle hole formed in the sewing machine needle plate, and passes through a substantially bottom thread passing position with respect to the way j. — When the thread cutting device cuts the bottom thread, the thread cutting device moves the bottom thread from the bottom thread through the position and holds it to the bottom thread holding portion. At this time, since the bottom weft system moves to the bottom line passing position closer to the bottom line holding portion of the bottom line lead-out portion, the bottom line pulled out by the movement can be reduced. Therefore, the end portion of the bottom line after the cutting does not generate an excessive length, and the thread tension can be suppressed from changing during the lower quilting process, and a good knot can be formed. Thereby, the quality of the seam product at the time of starting the sewing can be improved. According to the invention of the second aspect of the invention, since the bottom thread holding portion is disposed above the bottom thread lead-out portion, the bottom thread holding portion can be disposed closer to the bottom thread lead-out portion, and when the bottom thread is held, the excess bottom thread can be further removed. It can also improve the quality of the next sewing product. [Goods of the Invention] BEST MODE FOR CARRYING OUT THE INVENTION (Entire structure of the embodiment of the invention) The hook mechanism 5 of the embodiment of the present invention will be described with reference to Figs. 1 to 5 . Fig. 1 is a perspective view showing the sewing machine 10 on which the hook mechanism 50 is mounted. Hereinafter, a direction parallel to the upper surface of the needle plate 11 to be described later and parallel to the hook axis of the sewing machine 10 (not shown) is referred to as a γ-axis direction, and is parallel to the needle plate. The upper surface and the direction perpendicular to the Y-axis direction are referred to as the X-axis direction, and the direction perpendicular to the upper surface of the needle plate u is referred to as the Z-axis direction to explain each part of the sewing machine. The sewing machine 10 has a frame body 2 that is slightly rr-shaped as a whole, and the frame body 20 includes a bed portion 21' located below the frame body 20; the longitudinal body portion 'not shown is from the bed board portion 21 The one end portion is raised; and the arm portion 22 is extended from the upper end of the longitudinal body portion in the same direction as the bed portion 21. Further, in the arm portion 22, an upper shaft that can impart a driving force for moving up and down to the needle bar holding the stylus 12 is provided along the Y-axis direction, and in the bed portion 21, a pair is provided along the Y-axis direction. The hook mechanism 50 imparts a hooking force to the driving force. The upper shaft is fully rotated in a certain direction by the sewing machine motor, and the rotary driving force is transmitted to the hook shaft through the transmission mechanism. Thereby, the hook shaft can be synchronized with the upper and lower movement of the bur or an integral multiple of the frequency, and the rotation in the forward direction and the reverse direction can be repeated in the range of almost half rotation. Fig. 2 is a side view showing one end portion of the bed portion 21 of the casing 20 as viewed along the γ-axis direction. As shown in the figure, a needle plate 11 is provided at a position on the lower side of the bolster 12 of the bed portion 21, and a pinhole 13 through which the burr 12 can pass during sewing is formed on the needle plate 11. Further, a tangential device is provided on the lower side of the needle plate 11, and a hook mechanism 50 is provided below the bed plate portion 21 in the lower portion. The tangential device includes: the movable blade portion 14' is rotatably supported on the lower side of the needle plate 11; and the fixed blade portion is a movable line portion 14 that is conveyed across the upper and lower lines D, and is movable The cutter portion 14 is cut between the cutter portions 14; the motor ' is configured to rotate the movable blade portion 14 in the backward direction; and the drive force transmission mechanism is to connect the motor and the movable blade portion 14. The movable blade portion 14 is set to be rotated back and forth so as to be rotatable back and forth along the flat surface of the needle plate 11, and vertically below the pinhole 13. When the cutting is performed, the pinhole 13 is passed through a portion where the upper thread hangs from the stylus 12, a portion where the upper thread is folded back toward the object to be sewn under the needle plate, and a bottom line D, and the movable blade portion 14 must be left from the line. The portion that is suspended from the bur 12, and the cut upper thread is folded back under the needle plate toward the portion to be sewn and the bottom line D. Therefore, the configuration of the movable blade portion 14 is such that in the forward and backward rotation, the 1351455 can select only the light slave by the protrusion 14a and keep the upper line hanging from the bur 12, and in the return journey, by突..^ From the opposite side of 4a, the upper line is folded back under the needle plate toward the Wei (4) and the groceries (4). In the fourth drawing to be described later, the movable blade portion 14 located at the stop position between the forward stroke and the return stroke is displayed. In addition, in
^ ^ ^ . 在以4圖中，可動刀部14在箭頭S 德圍内知來_動，切依圖巾之 則進行逆時狀轉。 (彎鉤機構）^ ^ ^ . In Fig. 4, the movable blade portion 14 is known to move in the direction of the arrow S, and is reversed when the towel is cut. (hook mechanism)
第4圖係平面圖。 第3圖係彎鉤機構50之立體圖 1〇 如第1圖所示，f釣機構5〇包含有：梭心㈣，係可收 納捲繞底線D之梭心56者；擺梭52,係在梭心Μ则進行 來回旋動者；驅動部53，係可將來回旋動之驅動力從彎釣 轴傳達至擺梭52者；f鉤54，係可在内側保持擺㈣使之 能來回旋動者；擺梭壓部55，係可將擺梭52保持於彎釣Μ 15内部者，及導線板60，係於縫製時可引導線，使上線從車Figure 4 is a plan view. Fig. 3 is a perspective view of the hook mechanism 50. As shown in Fig. 1, the f fishing mechanism 5 includes: a bobbin (four) for accommodating the bobbin 56 of the bobbin thread D; the shuttle 52 is attached to The bobbin case is rotated back and forth; the driving part 53 can transmit the driving force of the back and forth rotation from the bending fishing shaft to the shuttle 52; the f hook 54 can hold the pendulum on the inner side (four) so that it can be rotated back and forth The shuttle pressing portion 55 is capable of holding the shuttle 52 inside the curved fishing rod 15, and the wire guide 60, which is capable of guiding the wire when sewing, so that the upper wire is taken from the vehicle.
針12垂下的部分與上線在針板下方折返朝向被縫製物的部 分互相隔離者。 如第1圖所示，彎鉤54為大徑之筒狀部54a與小徑的筒 狀部54b同心且一體化之形狀，小徑的筒狀部5扑中心部被 20 貫通，可插入彎鉤軸。 又，大徑筒狀部54a可收納擺梭52，並且於其内部形成 有與擺梭52之外周部分滑動接觸且引導其旋轉之滑動面。 亦即，擺梭52可旋轉地支持於滑動面。 又，彎鉤5 4其中心線沿著Y轴方向裝設於縫紉機床板部 10 21 ’且該裝設狀態中，為大徑筒狀部54a上部的部分形成為 稍微彎曲之略平面狀。該略平面狀有切口可貫通至内部， 此外’於略平面部上還固定裝設有導線板60。而’車針下 降插入形成於略平面部上之切口與形成於導線板60之後述 導孔65 ’交織上線與底線〇而可進行縫製。 擺梭52形成為略呈扇形，於其中心位置設有支軸52a， 可透過該支軸52a可旋轉地支持梭心56與梭心匣51。 又’於擺梭52其外周部形成有前述之與彎鉤54之滑接 面滑動的滑接面，並且於外周部之一端部形成有捕捉上線 用之尖銳的尖端52b，藉此’擺梭52可在内側之梭心匣51周 圍進行來回旋動，並藉由尖端52b捕捉上線。 驅動。卩53與擺梭52 —起收納於彎鉤54之内部，並且緊 扣住’f鉤Μ端部而固定支持住^該_部53形成為略呈肩 狀’在彎鉤轴來回旋動時，驅動部53圓周方向之一端部與 另-端部分別交互地抵接難52，與龍梭52—起進行來 回旋動。 如上所述，由於擺梭52之構造可無須直接連結至彎鉤 軸，而由連結彎鉤軸之驅動部53抵壓進行來回旋動，故藉 由在切換旋動方向之時點，上線之線圈通過驅動部53與擺 梭52之間隙’可使擺梭52穿過上線之線圈。雜，結果可 使從配置於擺梭52内側之梭心㈣中拉出的底線D穿過上 線之線圈。 該等擺梭52與驅動部53藉由固定裝設於彎釣 擺板壓部55，可保持於彎鉤μ之大徑筒狀部％内。 1351455 梭心56之構造為：可捲繞底線D之筒狀中心軸部 '設於 其兩端部之圓板狀的凸緣部，且在各凸緣部間捲繞底線D。 而，以擺梭52之支軸52a插入其筒狀中心軸部的狀態支持於 擺梭52。 5 梭心匣51係一端封閉、另一邊為開口之筒狀體，於其 内側可收納梭心56。該梭心匣51以收納有梭心56之狀態安 裝於擺梭52内，透過梭心56支持於支軸52a。 又，於梭心51之封閉端面侧，設有向半徑方向外側延 伸設置之防止旋轉用的突起51a。該防止旋轉用之突起51a 10 嵌入設於擺梭壓部55之凹部55a，可防止梭心匣51及梭心56 與擺梭52—起旋動。 此外’該突起51 a其前端部向裏侧彎曲而形成，且其彎 曲部形成為貫通有導線孔51b之狀態。前述梭心匣51於筒狀 之外周面上形成有貫通孔51c，内側之梭心56的底線D從貫 15 通孔51c拉出至外部，另外，穿過導線孔51b而被引導至導 線板60側。亦即，該導線孔5113係可規定梭心匣兄所導出之 底線D線路的引導機構，導線孔51b之出口側（突起51a之上 端面）相當於「梭心匣之底線導出部」。 (導線板） 2〇 如第4圖所示，導線板60之構造為：長方形平板之本體 板61、及安裝於本體板61具有預定形狀彈性的彈性板62， 本體板61於其左右兩端藉由兩個擋止螺釘64安裝於彎釣54 之上部。又，彈性板62藉由擋止螺釘64固定於本體板61。 於本體板61中央形成有貫通其表裡之導孔65,因應該 12 導孔65之形狀將上線誘導至缝製時的預定位置，或，誘導 至切斷底線D時之預定位置。 車針η對於本體板61之導孔65的預定位置進行上下移 動（參照第’當下降時侵人至彎鈞5怕部，f過車針12 5之上線被擺梭52之尖端⑽捕捉而進行線圈之形成。此時， 擺梭52以尖端52b向第4圖右方之狀態向右方前進。相對於 此，於本體板61形成有上線分別部66，其係朝向與捕捉線 時之尖端52b進行方向呈反方向（第4圖之左方）突起形狀的 前端部者。亦即，導孔65夾著該上線分別部66而形成分為 10 兩叉的線路徑。 藉由該上料料66，紐52之尖端52b所捕捉之上線 以尖端52b為界，該上游側的部分與該下游側之部分各自分 離於上線分別部66的兩側，可展開上線線圈。藉此，到尖 端52b移動至下方為止之間，可防止上線之兩側部分被擺梭 15 52與彎鉤54之滑接部分夾住，並且可充分擴大上線線圈以 穿過擺梭。 又’底線D於縫製時從下方向上方穿過本體板61之導孔 65。而’於導孔65除了引導上線之二股路徑外，還形成有 引導底線D至底線固持部67之路徑68。 20 減線固持部67係可事先將切斷後之底線端部保持為 用於下次縫製之預定長度的部位，藉由前述彈性板62而形 成於上述引導底線D之路徑68的終端部。 即彈11板62具有延長設置如爪狀之突起部62&，並且 配置為該突起邹仏橫跨路徑Μ之終端前。此外，該突起部 13 1351455 仏其病㈣然以平面視角看起來幾乎塞住路徑68,但若 從傾斜於突起邹62a之前端方向的斜上方看過去，則可調節 其前端位置而使具有底線D可通過路徑68之間隙。 切斷底線D時，於切斷之前，底線d藉由可動刀部啊 5沿著路徑68移動，但此時，通過由突起部仏所形成之狹小 間隙，到達路把68的終端。而，於切斷後由於底線端部 被突起62a擋住而無法反向移動，故成為保持在路獅終端 的狀態。亦即，路徑68終端與突起部62a所圍起之區域為底 線固持部67。 10 糾本體板61配合彎鉤54上面部的f曲形狀形成有 兩條折痕w，該本體板61藉由兩條折痕w形成三個平板面。 另-方® ’若彈性板62其突起部仏部 > 的平板面不與 本體板61之三個平板面中底_持部67所在的平板面呈平 行狀態’則突起部62a之前端部會遠離本體板61而使間隙過 15大，因而無法達成固持底線的功能。 因此，將突起部62a配置於底線固持部67所在之平板面 的平面内，以使突起部62a之前端部不會產生過大的間隙， 並且藉由設置於該底線固持部67所在之平板面内的撐止螺 釘63固定彈性板62。 20 此外’以下詳述將底線D引導至導孔65之底線固持部67 的路徑68方向、與底線固持部67的配置設定。 如第4圖所示，將底線D引導至底線固持部67之路徑68 於平面視角中，係沿著連結車針12之下針位置與突起5U之 導線孔51b(底線導出部）的直線而形成的。 14 1351455 又’可動刀部14在第4圖所示之箭頭s的範圍内進行來 回旋動，設定可動刀部之配置與路徑68的方向，以使對於 在可動刀部14向切斷方向旋動時抵接底線〇之位置（後述之 底線通過位置P)的可動刀部14圓弧狀移動執跡的接線方 5向，可與路徑68之方向大致一致。藉此，藉由抵接沿切斷 方向旋動之可動刀部14,底線D可沿著路徑68移動至底線固 持部67側。 第5圖係沿著第4圖之V-V線的截面圖。如第5圖所示， 底線D於縫製時，形成連結突起51a之導線孔51b至針板n 1〇之針孔13的大致直線路徑。因此，底線D於縫製時，可通過 相對於導線板60為一定之底線通過位置p。 而，剛述底線固持部67在平面視角中，宜設置於較上 述底線通過位置p更靠近為底線導出部之導線孔5lb的位 置。 15 例如，在平面視角中，底線固持部67更宜位在連結底 線通過位置P至導線部51b之線段上，在本實施型態中，將 底線固持部67之配置設定在導線孔51b的垂直上方。 (縫紉機之動作說明） 說明由上述構造所構成之縫紉機1〇的動作。 當縫製時，穿過上線之車針12進行上下移動，下降時 擺梭52之尖端52b捕捉上線，並將其線圈拉至下方。此時 在導線板60，導孔65之上線分別部66擴大上線線圈。而， 當尖端52b到達最下位置、擺梭52切換反方向之旋動時，藉 由未圖示之撥線桿機構拉起脫離尖端52b之上線，線圈，、社 15 1351455 果，擺梭52穿過線圈内側。藉此，底線D也穿過上線線圈， 成結而進行縫製。 此外，縫製完成後，驅動可動刀部14進行切線。首先， 可動刀部14從在固定刀部側待機之狀態通過針孔13之正下 5方，進行單程的旋動。藉此，可分開穿過針孔13之上線的 上游側。卩分（罪近上線供給源之部分）、與上線之下游側部分 及底線D。 接著，可動刀部14向固定刀部進行回程方向的旋動。 藉此，上線之下游側部分及底線D可由可動刀部14捕捉而運 10送至固定刀部側。藉此，移動並保持底線d從底線通過位置 P沿著路徑68至底線固持部67。 此外’將底線D及上線移動至固定刀部進行切斷。 而，由於底線D之切斷端部保持於底線固持部67,故於 進行切斷後之新的縫製時，可無須進行底線重設的作業。 15 (實施型態之效果） 於上述構造中’由於在彎鉤機構50中，將底線固持部 67設於較導線板60之底線通過位置p更接近為導線孔51b位 置之該導線孔51b的垂直上方，故上述底線d移動至底線固 持部67時，可減少從梭心56拉出之底線量。 20 此外，由於將底線固持部67設於導線孔51b之垂直上 方，故導線孔51b-底線固持部67-底線切斷位置為止的底線 路徑可不為彎曲迂迴之多餘路徑，而可減少切斷為止之底 線拉出量8 因此，切斷後之底線端部不會產生多餘的長度，於下 16The portion where the needle 12 is lowered and the upper thread are folded back below the needle plate to be separated from each other toward the portion to be sewn. As shown in Fig. 1, the hook 54 has a shape in which the large-diameter cylindrical portion 54a and the small-diameter cylindrical portion 54b are concentric and integrated, and the small-diameter cylindrical portion 5 is penetrated by the center portion 20 so as to be inserted into the bend. Hook shaft. Further, the large-diameter cylindrical portion 54a can accommodate the shuttle 52, and has a sliding surface which is in sliding contact with the outer peripheral portion of the shuttle 52 and guides the rotation thereof. That is, the shuttle 52 is rotatably supported by the sliding surface. Further, the hook line 54 has its center line attached to the sewing machine board portion 10 21 ' along the Y-axis direction, and in the mounted state, the portion of the upper portion of the large-diameter cylindrical portion 54a is formed in a slightly curved shape. The slightly planar shape has a slit through which the inside can be penetrated, and the wire plate 60 is fixedly mounted on the slightly flat portion. Further, the yoke is inserted into the slit formed on the slightly flat portion and the upper and lower threads are interlaced with the guide hole 65' formed in the lead plate 60 to be sewn. The shuttle 52 is formed in a slightly fan shape, and has a support shaft 52a at its center position, through which the bobbin 56 and the bobbin 51 are rotatably supported. Further, a sliding surface that slides on the sliding surface of the hook 54 is formed on the outer peripheral portion of the shuttle 52, and a sharp tip end 52b for catching the upper thread is formed at one end portion of the outer peripheral portion, thereby 52 can be rotated back and forth around the inner bobbin 51 and captured by the tip 52b. drive. The cymbal 53 is housed in the interior of the hook 54 together with the shuttle 52, and is fastened to the end of the 'f hook and is fixedly supported. The _ portion 53 is formed in a slightly shoulder shape' when the hook shaft is rotated back and forth. One end portion of the driving portion 53 in the circumferential direction and the other end portion are alternately abutted against the difficulty 52, and are rotated back and forth together with the dragon shuttle 52. As described above, since the structure of the shuttle 52 can be directly coupled to the hook shaft without being directly coupled to the hook shaft, the driving portion 53 that connects the hook shaft is pressed back and forth, so that the coil of the upper thread is rotated at the timing of switching the rotation direction. The shuttle 52 can pass through the winding of the upper wire by the gap ' between the driving portion 53 and the shuttle 52. As a result, the bottom line D pulled out from the bobbin (4) disposed inside the shuttle 52 can be passed through the coil of the upper line. The shuttle 52 and the drive unit 53 are fixedly mounted to the curved pendulum pressing portion 55, and can be held in the large-diameter cylindrical portion % of the hook μ. 1351455 The bobbin 56 has a structure in which a cylindrical center shaft portion of the bottom thread D can be wound, and a flange-like flange portion provided at both end portions thereof is wound, and a bottom line D is wound between the flange portions. On the other hand, the shuttle 52 is supported by the state in which the support shaft 52a of the shuttle 52 is inserted into the cylindrical central shaft portion. 5 The bobbin case 51 is a cylindrical body whose one end is closed and the other side is open, and the bobbin 56 can be accommodated inside. The bobbin case 51 is mounted in the shuttle 52 in a state in which the bobbin 56 is housed, and is supported by the support shaft 52a via the bobbin 56. Further, on the closed end face side of the bobbin 51, a projection 51a for preventing rotation extending outward in the radial direction is provided. The projection 51a for preventing rotation is fitted into the recess 55a provided in the shuttle pressing portion 55, and the bobbin 51 and the bobbin 56 are prevented from rotating together with the shuttle 52. Further, the projection 51a is formed by bending the front end portion toward the back side, and the bent portion is formed to penetrate the lead wire hole 51b. The bobbin case 51 is formed with a through hole 51c on the outer peripheral surface of the cylindrical shape, and the bottom line D of the inner bobbin 56 is pulled out from the through 15 through hole 51c to the outside, and is guided to the lead plate through the wire hole 51b. 60 sides. That is, the lead wire 5113 defines a guide mechanism for the bottom line D line derived from the bobbin, and the exit side of the lead hole 51b (the upper end surface of the projection 51a) corresponds to the "bottom line lead-out portion of the bobbin". (Wire plate) 2 As shown in Fig. 4, the wire plate 60 is constructed as a rectangular plate body plate 61 and an elastic plate 62 mounted on the body plate 61 having a predetermined shape elasticity, and the body plate 61 is at the left and right ends thereof. It is attached to the upper portion of the curved fishing 54 by two stopper screws 64. Further, the elastic plate 62 is fixed to the main body plate 61 by a stopper screw 64. A guide hole 65 penetrating the front and back of the body plate 61 is formed in the center of the main body plate 61, and the shape of the 12-way guide hole 65 is induced to a predetermined position at the time of sewing, or to a predetermined position when the bottom line D is cut. The yoke η moves up and down with respect to the predetermined position of the guide hole 65 of the main body plate 61 (refer to the first 'when the descent is invaded to the bend 5, the upper line of the f trajectory 12 5 is caught by the tip (10) of the shuttle 52) At this time, the shuttle 52 is advanced to the right by the tip 52b to the right in the fourth figure. On the other hand, the upper plate portion 66 is formed on the main body plate 61, and the pair is oriented toward the capture line. The tip end 52b performs a tip end portion in a direction in which the direction is reversed (to the left in Fig. 4). That is, the guide hole 65 sandwiches the upper line portion 66 to form a line path divided into 10 two-fork. The material 66, the upper line captured by the tip end 52b of the button 52 is bounded by the tip end 52b, and the portion on the upstream side and the portion on the downstream side are respectively separated from the two sides of the upper line portion 66, and the upper wire can be unfolded. When the tip 52b is moved to the lower side, the two sides of the upper thread can be prevented from being caught by the sliding portion of the shuttle 15 52 and the hook 54, and the upper thread can be sufficiently enlarged to pass through the shuttle. Passing through the guide hole 65 of the body plate 61 from the bottom to the top. The hole 65 is formed with a path 68 for guiding the bottom line D to the bottom line holding portion 67 in addition to the two paths guiding the upper line. 20 The reduced line holding portion 67 can hold the cut bottom end portion in advance for the next sewing schedule. The length portion is formed at the end portion of the path 68 of the guide bottom line D by the elastic plate 62. That is, the elastic 11 plate 62 has a projection portion 62& which is extended in a claw shape, and is configured such that the projection is crossed. In addition, the protrusion 13 1335155 is ill (4) and looks almost concealed the path 68 in a plane view, but can be adjusted if viewed from an obliquely oblique direction from the front end of the protrusion 62a. The front end position is such that the bottom line D can pass through the gap of the path 68. When the bottom line D is cut, the bottom line d is moved along the path 68 by the movable blade portion 5 before cutting, but at this time, by the protrusion portion The narrow gap formed reaches the end of the handlebar 68. However, since the end of the bottom thread is blocked by the projection 62a and cannot be reversely moved after the cutting, it is maintained in the state of the road lion terminal. That is, the terminal 68 and the projection of the path 68. 62a The enclosed area is the bottom line holding portion 67. 10 The correcting body plate 61 is formed with two creases w in the shape of the f on the upper surface of the hook 54, and the body plate 61 forms three flat faces by two creases w. The other side of the protrusion 62' is not in a state in which the flat surface of the elastic plate 62 has a flat portion of the protrusion portion of the elastic plate 62 which is not in parallel with the flat surface of the three flat surface of the main body plate 61. The portion is separated from the main body plate 61 and has a gap of 15 or more. Therefore, the function of holding the bottom line cannot be achieved. Therefore, the protruding portion 62a is disposed in the plane of the flat surface on which the bottom line holding portion 67 is located so that the front end portion of the protruding portion 62a is not An excessive gap is generated, and the elastic plate 62 is fixed by the stopper screw 63 provided in the flat surface of the bottom thread holding portion 67. Further, the bottom line D is guided to the direction of the path 68 of the bottom line holding portion 67 of the guide hole 65 and the arrangement of the bottom line holding portion 67. As shown in Fig. 4, the path 68 for guiding the bobbin thread D to the bobbin thread holding portion 67 is in a plane viewing angle along a straight line connecting the lower needle position of the bur 12 to the lead hole 51b (bottom line lead-out portion) of the projection 5U. Forming. 14 1351455 Further, the movable blade portion 14 is rotated back and forth within the range of the arrow s shown in Fig. 4, and the arrangement of the movable blade portion and the direction of the path 68 are set so as to be rotated in the cutting direction of the movable blade portion 14. The movable blade portion 14 that is in contact with the bottom wire 动 at the time of movement (the bottom thread passing position P to be described later) moves in an arc shape and is aligned with the direction of the path 68. Thereby, the bottom line D can be moved along the path 68 to the side of the bottom line holding portion 67 by abutting against the movable blade portion 14 that is rotated in the cutting direction. Fig. 5 is a cross-sectional view taken along line V-V of Fig. 4. As shown in Fig. 5, the bottom line D forms a substantially linear path connecting the lead holes 51b of the projections 51a to the pinholes 13 of the needle plate n1〇 at the time of sewing. Therefore, the bottom line D can pass the position p by a certain bottom line with respect to the lead plate 60 when sewing. On the other hand, the bottom line holding portion 67 is preferably disposed closer to the position of the wire hole 51b of the lower wire lead-out portion than the bottom line passing position p in the plane view angle. For example, in the plan view, the bottom line holding portion 67 is preferably placed on the line segment connecting the bottom line passing position P to the wire portion 51b. In the present embodiment, the configuration of the bottom line holding portion 67 is set to the vertical of the wire hole 51b. Above. (Description of Operation of Sewing Machine) The operation of the sewing machine 1A configured by the above-described structure will be described. When sewing, the needle 12 passing through the upper thread moves up and down, and when it descends, the tip 52b of the shuttle 52 catches the upper thread and pulls the coil to the lower side. At this time, in the lead plate 60, the upper portion 66 of the guide hole 65 expands the upper coil. On the other hand, when the tip end 52b reaches the lowermost position and the shuttle 52 switches the rotation in the reverse direction, the wire rod mechanism (not shown) pulls up the line of the detachment tip 52b, and the coil, the body 15 1351455, the shuttle 52 Pass through the inside of the coil. Thereby, the bottom line D also passes through the upper thread and is sewn into a knot. Further, after the sewing is completed, the movable blade portion 14 is driven to perform tangential cutting. First, the movable blade portion 14 is rotated by one-way rotation through the right side of the pinhole 13 from the state in which the fixed blade portion is in standby. Thereby, it can be separated through the upstream side of the upper line of the pinhole 13. Divide (sin near the supply line of the line), the downstream side of the upper line, and the bottom line D. Next, the movable blade portion 14 is rotated in the returning direction to the fixed blade portion. Thereby, the downstream side portion of the upper thread and the bottom line D can be caught by the movable blade portion 14 and sent to the fixed blade portion side. Thereby, the bottom line d is moved and held from the bottom line through the position P along the path 68 to the bottom line holding portion 67. In addition, the bottom line D and the upper thread are moved to the fixed blade portion for cutting. Further, since the cut end portion of the bottom thread D is held by the bottom thread holding portion 67, it is not necessary to perform the operation of resetting the bottom thread at the time of the new sewing after the cutting. 15 (Effect of the embodiment) In the above configuration, the bottom wire holding portion 67 is disposed closer to the wire hole 51b which is the position of the wire hole 51b than the bottom line passing position p of the wire board 60 in the hook mechanism 50. When the bottom line d is moved to the bottom line holding portion 67, the amount of the bottom thread pulled out from the bobbin 56 can be reduced. Further, since the bottom thread holding portion 67 is provided vertically above the wire hole 51b, the bottom line path from the wire hole 51b to the bottom thread holding portion 67 to the bottom line cutting position may not be an unnecessary path of bending and twisting, and the cutting may be reduced. The bottom thread pulls out 8 so that the end of the bottom thread after cutting does not produce extra length, under the next 16