經濟部中央標準局貝工消費合作社印製 3 ^ G 6 6 2 A7 B7 五、發明説明（） ... 所揭露的是一種縫紉機之底紗供給裝置，特別是一種 使用於筒型工業用縫紉機，用以在縫紉過程中供給底線， 易於調整底&之供給量與張力的底紗供給裝置。 在眾多的縫紉機械中，筒型縫紹機僅是其中的一種， 而類似的物品及其部份的技術在中華民國專利公告第2 8 3 1 7 3號的「圓筒型縫紉機/發明專利核准案中亦有揭 露，而本發明所揭露之底紗供給裝置，即是配設於此種縫 紉機械使用者，習知圓筒型縫紉機之底紗供給裝置係爲一 種配設於機台內部的設計，該底紗供給裝置之主要作用係 在底紗針桿退針之時預儲底紗，並且在該底紗針桿出針時 將該底紗維持在一適當的張力値，以免因慣性而送出的底 紗過於鬆散而糾結甚至絞入該機台內部，造成故障。 而習知之底紗供給裝置，大致係包^有二個彼此保持 有一間隙的導紗孔，而該底紗即是逐—的穿過該二個導紗 孔而至該底紗針桿；另外在該二個導紗孔之間橫切該底紗 的橫切面上’則設有一作旋轉運動的凸輪，藉由該凸輪面 與該底紗之相切作用，而在適當的時機迫緊該底紗同時迫 使該底紗撓曲出一段供喂給的底紗，因此其中的底紗係爲 不動者’其張力與儲紗量完全是由該旋轉的凸輪所控制； 而此種設計之凸輪係在該機台之內部，而該底紗之供給路 徑亦需經過該機台之內部，而在污垢、棉絮之堆積、高速 運轉以及磨擦時拌線之種種因素，將極易使得該底紗被絞 入該機台之內部，不但影響作業之效率，在排除故障時亦 需要拆開該機台，所以在維修上將極爲不便，而非專業技 3 本紙張尺度^中國國家樣準（<^5)八4則^「210\?.97公釐） "" —.11—- —I -_rl -- -II ~•訂 ". I (請先閲讀背面之注$項再填寫本頁) 320662 經濟部中央楳準局貝工消费合作社印装 A7 B7 五、發明説明（） . . 士不可維修之限制，亦造成作業的停頓。 本發明之主要目的就是要提供一種無故障的底紗 裝置，該底&供給裝置係配設於該圓筒型縫紉機之機 部，而該底紗之供給路徑亦大部份位於該機台之 表，可以避免底紗在陝小之機台內部發生絞線的機會。 本發明之次一目的在提供一種可以調整底紗之#^ 與張力的底紗供給裝置，主要係將底紗在縫製之過 將底紗托經一個固定的固定板，藉由該固定板在該 經之時，控制底紗的張力並且儲存縫製時所需的紗I^、 使縫製完成之縫線平整且不致於鬆散。 本發明之又一目的在提供一種低成本的底紗 置，其中的喂紗機構係由該圓筒型縫紉機既有之〜 所驅動，且該擺動軸又恰與該底紗針桿rt'步運作，因此不 需變更該圓筒型縫紉機之原始設計，：只需增設該喂紗機 構，即可以提供一種低故障率、故障排除容易，且低成本; 的底紗供給裝置。 有關本發明之技術內容與實施例，茲配合阖式說明如 次： 圖式說明： 第1圖，係爲本發明之構造圖，顯示各元件之間的連接關 係。 第2圖，係爲喂紗機構之構造分解圖。 第3 - 1圖，係爲本發明之另一動作示意圖，顯示喂紗機 構將儲紗供給予底紗針桿的情形。 4 本紙张又度適用中國國家榡準（CNS ) Λ4^ ( 210Χ297公嫠） —— ί請先閲讀背面之注再填跨本耳) -訂. Μ 32C662 A7 _ B7 ___ 五、發明説明（） > 第3 — 2圖，係爲第3 — 1圖之俯視圓、 第4 一1圖，係爲本發明之動作示意圖，顯示喂紗機構與 底#針桿之動作。 第4 — 2圖，係爲第4 - 1圖之俯視圖。 第5 - 1圖，係爲本發明之另一動作示意圖，顯示喂紗機 構儲紗時之情形。 4 第5 — 2圖，係爲第5 — 1圖之俯視圖。 第6 — 1圖，係爲儲紗板之另一構造實施例圖。 第6 — 2圖，係爲第6 — 1圖之構造斷面圖。 第7圖，係爲第6 — 1圖之使用實施例圖。 請參閱「第1，2圖」，本發明至少包括有：一由外 部之動力裝置(通常爲一高速電動機)驅動的偏心主軸1 ;一 可以在一直線方向往復運動用以縫製底S的底紗針桿2; 一用以驅動該底紗針桿2作往復運動的擺動軸3;—將前 述主軸1之旋轉運動轉換爲往復鐘擺運動的搖擺凸輪機構 4，用以驅動該擺動軸3運動；以及一配設於該機台外部， 並且由該擺動軸3帶動的喂紗機構5。 前述之搖擺凸輪機構4包括有：一固設於該擺動軸 3，並且自該擺動軸3之徑向突出的懸臂4 0，以及一兩 端分別連接該偏心主軸1與該懸臂4 0的連桿4 1，其中 該懸臂40之端部份係爲一球接頭400，而該連桿41 之兩端則分別以可滑動但不分離之關係與該球接頭4 0 0 以及該偏心主軸1連接，因此雖著該偏心主軸1之偏心旋 轉運動，該連桿4 1將會連動該擺動軸3，並使該擺動軸 5 本紙悵尺度適用中國國家標準（CNS ) A4規格（210X297公釐) ' 3^0662 A7 B7 五、發明説明（） t 3依其軸心作往復的搖擺運動。 前述之擺動軸3還具有一在其徑向、方向向外延伸的連 接臂3 0，命在該連接臂3 0之一端則以可活動之關係樞 設於該底紗針桿2，用以帶動該底紗針桿2在其軸向作往 復的運動，藉由該底紗針桿2之前端的底紗針尖2 1，而 將穿設於該底紗針尖2 1的底紗線頭，縫製於待縫紉之物 品表面，前述之擺動軸3的軸向至少還具有一延伸突出該 縫紉機之機台外部的端部31。 前述之喂紗機構5，包括有：一固設於該擺動軸3之 端部3 1的拉紗臂5 0，以及固定於該縫紉機之機台外表 固定位置的固定板5 1 ;其中該拉紗臂5 0並且由該擺動 軸3帶動而在一個以該擺動軸3之軸心爲圓心的扇形平面 來回移動於一喂紗位置8 0以及一儲紗置8 1之間，且 該拉紗臂5 0至少具有二個彼此保持有一距離的第一穿紗 孔5 Ο 1，與第二穿紗孔5 0 2用以供前述的底紗6逐一 穿過，然後再穿至該底紗針尖2 1，且該第一穿紗孔5 0 1與該第二穿紗孔5 0 2將同步的隨著該拉紗臂5 0之往 復旋擺而在一弧形的路徑5 2上移動。 而該固定板5 1至少具有分別固定於該弧形路徑5 2 之兩側相對位置，用以供該底紗6穿過的第一固定線孔5 3，與第二固定線孔5 4 ;以及一設置在該固定板5 1之 固定位置的儲紗板7，用以提供一個固定的路徑，供前述 的底紗6以可運動之關係滑經該儲紗板7的一凸緣7 0， 而在縫製之過程中利用該凸緣7 0控制該底紗6的供、給量 6 -·:'^., ---------^ ^-- (請先閲请背面之注意事項再填寫本頁) *1Τ 乂 經濟部中央標準局貝工消費合作社印製 本紙張尺度適用中國國家標率（CNS ) Α4規格（210 X 297公釐） 經濟部中央局属工消費合作社印装 320662 Α7 Β7 五、發明説明（） . 與張力。 在本發明之第一實施例中，「如第2圖」所示，該儲 紗板7係爲二拧狀，雄且以垂直於該平’面狀路徑的弧形路 徑5 2的關係設置，該儲紗板具有一可供前述之底紗6滑 經的凸緣7 0以及一位於該凸緣7 0的弧形凸起部7 3，Printed by the Beigong Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 3 ^ G 6 6 2 A7 B7 V. Description of the invention () ... What is disclosed is a bottom yarn supply device of a sewing machine, especially a type of industrial sewing machine used for barrels , It is used to supply the bobbin thread during the sewing process, and it is easy to adjust the supply amount and tension of the bottom & Among the many sewing machines, the cylindrical sewing machine is only one of them, and the technology of similar articles and some of them is listed in the "Cylinder Sewing Machine / Invention Patent" of the Republic of China Patent Announcement No. 2 8 3 1 7 3 It is also disclosed in the approval case, and the bottom yarn supply device disclosed in the present invention is configured to be used by users of such sewing machines. The bottom yarn supply device of the conventional cylindrical sewing machine is a type disposed inside the machine. Design, the main function of the bottom yarn supply device is to pre-store the bottom yarn when the bottom yarn needle bar is retracted, and to maintain the bottom yarn at an appropriate tension value when the bottom yarn needle bar is out of the needle, so as not to cause The bottom yarn sent by inertia is too loose and entangled or even entangled into the machine, causing a malfunction. The conventional bottom yarn supply device generally consists of two yarn guide holes that maintain a gap between each other, and the bottom yarn is It passes through the two yarn guide holes one by one to the bottom yarn needle bar; in addition, the cross section of the bottom yarn between the two yarn guide holes is provided with a cam for rotary motion. The tangential action of the cam surface and the bottom yarn is The timing of pressing the bottom yarn at the same time forces the bottom yarn to flex out a section of the bottom yarn for feeding, so the bottom yarn is fixed. The tension and the amount of yarn storage are completely controlled by the rotating cam; and The cam of this design is inside the machine, and the supply path of the bottom yarn also needs to pass through the inside of the machine, and various factors such as dirt, cotton wool accumulation, high-speed operation and friction during mixing, will be extremely It is easy to make the bottom yarn twisted into the machine, which not only affects the efficiency of the operation, but also needs to be disassembled when troubleshooting, so it is extremely inconvenient for maintenance, rather than professional skills. 3 paper standards ^ China National Standards (< ^ 5) Eight 4 ^ "210 \ ?. 97mm) " " —.11—- —I -_rl--II ~ • Subscribe ". I (Please read first (Note $ on the back and then fill out this page) 320662 A7 B7 printed by the Beigong Consumer Cooperative of the Central Bureau of Economic Affairs of the Ministry of Economic Affairs 5. Description of the invention ()... The limitation of non-maintenance also causes the suspension of operations. The main purpose of the present invention Is to provide a fault-free bottom yarn device, the bottom & supply device is equipped with In the machine part of the cylindrical sewing machine, and the supply path of the bottom yarn is also mostly located on the table of the machine, which can avoid the chance of the bottom yarn twisting inside the machine of the Shaanxi small machine. The purpose is to provide a bottom yarn supply device capable of adjusting the bottom yarn # ^ and tension, which is mainly to pass the bottom yarn through a fixed fixing plate after sewing, and by using the fixing plate at the time of the warp, Control the tension of the bottom yarn and store the yarn required during sewing, so that the stitches after sewing are smooth and not loose. Another object of the present invention is to provide a low-cost bottom yarn setting, in which the yarn feeding mechanism is It is driven by the existing cylindrical sewing machine, and the swing axis operates exactly at the rt 'step of the bottom yarn needle bar, so there is no need to change the original design of the cylindrical sewing machine: only need to add the yarn feed Mechanism, that can provide a low failure rate, easy troubleshooting, and low cost; the bottom yarn supply device. Regarding the technical content and embodiments of the present invention, the following descriptions are provided in conjunction with the closing method: The description of the drawings: FIG. 1 is a structural diagram of the present invention, showing the connection relationship between the components. Figure 2 is an exploded view of the structure of the yarn feeding mechanism. Figure 3-1 is another schematic diagram of the operation of the present invention, showing the yarn feeding mechanism supplying the yarn storage to the bottom needle bar. 4 This paper is again applicable to the Chinese National Standard (CNS) Λ4 ^ (210Χ297 公 嫠) —— Please read the note on the back before filling in the ear)-order. Μ 32C662 A7 _ B7 ___ V. Description of invention () > Figures 3-2 are the top circles of Figures 3-1 and Figures 4-1 are diagrams of the operation of the present invention, showing the actions of the yarn feeding mechanism and the bottom #needle bar. Figure 4-2 is a top view of Figure 4-1. Figure 5-1 is another schematic diagram of the present invention, showing the yarn feeding mechanism when the yarn storage mechanism. 4 Figure 5-2 is the top view of Figure 5-1. Figure 6-1 is another embodiment of the structure of the yarn storage board. Figure 6-2 is the structural cross-sectional view of Figure 6-1. Figure 7 is an example of the use of Figure 6-1. Please refer to "Pictures 1 and 2". The present invention includes at least: an eccentric spindle 1 driven by an external power device (usually a high-speed motor); a bottom yarn that can be reciprocated in a linear direction to sew the bottom S Needle bar 2; a swing shaft 3 for driving the bottom yarn needle bar 2 to reciprocate;-a swing cam mechanism 4 that converts the rotational motion of the aforementioned main shaft 1 into a reciprocating pendulum motion to drive the movement of the swing shaft 3; And a yarn feeding mechanism 5 which is arranged outside the machine and driven by the swing shaft 3. The aforementioned swing cam mechanism 4 includes: a cantilever 40 fixed to the swing shaft 3 and protruding radially from the swing shaft 3; and a connection between the two ends of the eccentric spindle 1 and the cantilever 40 Rod 41, wherein the end portion of the cantilever 40 is a ball joint 400, and the two ends of the connecting rod 41 are respectively connected to the ball joint 400 and the eccentric spindle 1 in a slidable but not separated relationship Therefore, despite the eccentric rotary motion of the eccentric spindle 1, the connecting rod 41 will link the swing axis 3, and the swing axis 5 will be adapted to the Chinese National Standard (CNS) A4 specification (210X297mm) 3 ^ 0662 A7 B7 V. Description of the invention () t 3 The reciprocating rocking motion is performed according to its axis. The aforementioned oscillating shaft 3 also has a connecting arm 30 extending outward in its radial direction and direction. The one end of the connecting arm 30 is pivotally mounted on the bottom yarn needle bar 2 in a movable relationship for The bottom yarn needle bar 2 is driven to reciprocate in its axial direction, and the bottom yarn needle 21 threaded on the bottom yarn needle 21 is sewed by the bottom yarn needle 21 at the front end of the bottom yarn needle bar 2 On the surface of the article to be sewn, the aforesaid swing axis 3 has at least an end portion 31 extending and protruding outside the machine table of the sewing machine. The aforementioned yarn feeding mechanism 5 includes: a yarn pulling arm 50 fixed to the end portion 31 of the swing shaft 3, and a fixing plate 51 fixed to the outer surface of the sewing machine at a fixed position; wherein the pulling The yarn arm 50 is driven by the swing axis 3 to move back and forth between a yarn feeding position 80 and a yarn storage position 81 in a fan-shaped plane centered on the axis of the swing axis 3, and the drawn yarn The arm 50 has at least two first threading holes 5 Ο 1 maintained at a distance from each other, and the second threading holes 50 2 are used to pass through the aforementioned bottom yarn 6 one by one, and then threaded to the bottom yarn tip 21, and the first threading hole 50 1 and the second threading hole 50 2 will move synchronously along an arc-shaped path 5 2 with the reciprocating swing of the yarn pulling arm 50. And the fixing plate 51 has at least fixed on the two sides of the arc-shaped path 5 2 relative positions for the first fixing thread hole 6 for the bottom yarn 6 through, and the second fixing thread hole 5 4; And a yarn storage plate 7 disposed at a fixed position of the fixing plate 51 to provide a fixed path for the aforementioned bottom yarn 6 to slide through a flange 70 of the yarn storage plate 7 in a movable relationship , And during the sewing process, the flange 70 is used to control the supply and amount of the bottom yarn 6-·: '^., --------- ^ ^-(please read the back first Please pay attention to this page and fill out this page) * 1Τ The paper standard printed by the Beigong Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy is applicable to China National Standard Rate (CNS) Α4 specifications (210 X 297 mm). Printing 320662 Α7 Β7 V. Description of invention (). With tension. In the first embodiment of the present invention, as shown in "Figure 2", the yarn storage plate 7 is a two-twisted shape, male and arranged in a relation of an arc-shaped path 52 perpendicular to the flat-shaped path , The yarn storage board has a flange 70 through which the bottom yarn 6 can slide through and an arc-shaped protrusion 73 located on the flange 70,
I 該弧fe凸起誧7 3自該固定板5 1之平面方向觀之，猶如 一起伏的山脊，而該底紗6即是在依序穿過該第一固定線 孔5 3、錐一穿紗孔5 0 1之後越過該凸緣7 0，然後再 依序的穿過該第二穿紗孔5 0 2、第二固定線孔d 4，再 穿過該底紗針尖2 1 ;藉由前述之弧形凸起部7 3而在該 邊緣區分出一個儲紗起點7 1與一個釋放點7 2，其中該 喂紗點係靠近於該儲紗起點71。 _ 而在實施上，該儲紗板7係藉複數螺絲7 4安裝於該 固定板5 i，而可以視需要_時的調整該儲紗板7之配匹 位置。 如「第3 — 1，3 — 2圖」所示，當前述之底紗釺椁 2伸出進行縫製作業時，該拉紗臂5 0係移動至接近該儲 紗起點7 1的位置，此畤依序穿過該第一固定線孔5 3、 第一穿紗孔5 〇 1、第二穿紗孔5 0 2、以及第二固定線 孔5 4之間的底紗6係爲最短，此時來自該η畏紗機構5的 底紗6將完全用於該縫製之用。 如「第4 一 1，4 一 2圖」所示，當前述之底紗針桿 2向後退出該縫製位置時，該拉紗臂5 0之第一穿紗孔5 0 1、第二穿紗孔5 〇 2將逐漸的移經該弧形凸起部7 7 本紙張尺度適用中國Β家揉準（CNS ) Α4规格（210X297公釐] ---i - i·. 1 1 ϋ I--- (請先閲讀背面之注$項再填寫本頁) II訂-----A十 經濟部中央橾準局属工消费合作社印装 A7 B7 五、發明説明（） . 3，此時的底紗6將如「第4 - 2圖」所示的先被該弧形 凸起部7 3的儲紗起點7 1所勾住，致使介於該第一固定 線孔5 3與巢二固定線孔5 4之間的底紗長度伴隨著該拉 紗臂5 0之拉弓丨而增長其儲紗量，此時的底紗6與該凸緣 7 0之接觸點亦將逐漸的择向該釋放2，同時藉由該 底紗6的張力繃緊該底紗6，用以防止底紗6因爲前次出 紗時之蓮動慣性而逐漸拉長鬆散或是絞結在一起，並且可 以使得縫製在布料之上的底紗被繃緊，而不會有鬆散的浮 紗現象。 如「第5 — 1，5 — 2圖」所示，當前述之底紗針桿 2向後退至盡頭時，該拉紗# 5 0之第一穿紗扎5 0 1、 第二穿紗孔5 0 2將移動至遠離該儲紗起點7 1最遠的位 置，並且將底紗6拉長至最長，同時前威'被勾在該儲紗起 點7 1的底紗6亦將會漸漸的滑動至該釋放點7 2，然後 在該拉紗桿5 0旋擺至圖中最右側之盡頭位置時，瞬間的 越過該釋放點7 2，而在此時依序穿過該第一固定線孔5 3、第一穿紗孔5 0 1、第二穿紗孔5 0 2、以及第二固 定線孔5 4之間的底紗6係爲最長，而成爲下次鏠製作業 中底紗6所需之線量。 而如「6-1，6 — 2圖」所示者，係爲前述儲紗板 7的另一可行實施例，如圖所示，該儲紗板8主要是將前 述單件式的儲紗板7在其長軸向分割成二個相對應的前儲 紗板8 ΰ與後儲紗板8 1，且該二個儲紗板8 0，8 1彼 此係藉由一樞接元件8 2，以可活動之關係樞接在一起， 8 本紙張尺度逍用中國國家揉準（〇阳）八4规格（210父297公釐）—_ --I β. -1 一衣 i - (婧先閏讀背面之注項再填寫本頁) 订 3^0662 A7 B7 五、發明説明（） ， 其中該樞接元件8 2可以是一種螺絲，其係穿過前儲紗板 8 0的一圓形孔而蔣該前儲紗板8 0樞接於該後儲紗板8 1的一狹長fe穿扎8 1 1之中，而該前、後儲紗板8 0， 8 1則又分別的利用該螺絲？ 4安裝於該縫紉機，因此使 用者可以視需要的放鬆該螺絲74並且移動該前、後儲紗 板8 0，？ 1，便可以改變該儲紗起點7 1與該釋放點7 2相對於該拉紗臂5 0的位置，而調整該底紗6的儲紗 量。儲紗起與釋放時間，以配合該底紗針桿2的作動時間。 同理，使用者也可以如「第7圖」所示的，在放鬆該 螺絲7 4，7 4’之後，使該前、後儲紗板8 0，8 1分 別以該螺絲7 4或7 4’爲中心作旋轉蓮動，改變該前、 後儲紗板8 0與8 1之間的夾角，致使該釋放點7 2在該 弧形凸起部7 3之徑向方向與該第一、三固定線孔5 3， 5 4之間的距離改變，而調整該底紗6在該釋放點7 2被 釋放的時間，以及該底紗6的儲紗量，以配合該底紗針桿 2的作動時間。 (請先W讀背面之注^•項再填寫本頁) 經濟部中央標準局負工消費合作社印装 圓式之符號說明： 偏心主軸·· · 1 底紗針桿· .,· · . . 2 底紗針尖· · · • · 2 1 擺動軸·· ......3 連接臂· · ·， • · 3 0 端部> · · .....3 1 搖攏凸輪機構· • · · 4 懸臂· · · .....4 0 球接頭· j · ‘ •40 0 連桿· · · .....4 ί 喂紗機構·· · 5 拉紗臂.. .....5 0 第一穿紗孔·· •50 1 结二穿紗孔 ••••502 本紙張尺度適用中國國家標準（CNS ) A4規格（2丨0X297公釐） 經濟部中央揉準局員工消費合作社印裝 A7 B7 五、發明説明（） 固定板···· ••51 弧形路徑··· •••52 第一固定線孔· ..53 第二固定線孔· •••54 底紗· · /· · • · · 6 儲紗板··· * ....7 凸緣..... •'70 儲紗點···· ••*71 釋放點···· ..72 弧形凸起、部·· •••73 .艘絲..... ..74 螺絲..... ..74, 儲紗板· * ·· • · · 8 前儲紗板··· •—80 後儲紗板··· ••81 樞接元件，·· •••82 狹長形穿孔·· • 8 1 1 ! (請先閲讀背面之注項再填寫本頁)I The arc fe convex ridge 7 3 is viewed from the plane direction of the fixing plate 51, as if it is a ridge lying down, and the bottom yarn 6 is sequentially passing through the first fixing line hole 5 3. The cone 1 After passing through the thread hole 5 0 1 across the flange 70, and then sequentially through the second thread hole 5 0 2, the second fixed thread hole d 4, and then through the bottom yarn needle tip 2 1; From the aforementioned arc-shaped convex portion 73, a yarn storage starting point 71 and a release point 72 are distinguished at the edge, wherein the yarn feeding point is close to the yarn storage starting point 71. In practice, the yarn storage plate 7 is mounted on the fixing plate 5 i by a plurality of screws 74, and the matching position of the yarn storage plate 7 can be adjusted as needed. As shown in "Pictures 3-1, 3-2", when the aforementioned bottom yarn 2 is extended for sewing, the yarn pulling arm 50 moves to a position close to the yarn storage starting point 7 1. The bottom thread 6 passing through the first fixed thread hole 5 3, the first thread thread hole 5 〇1, the second thread thread hole 5 0 2, and the second thread thread 54 is the shortest, At this time, the bottom yarn 6 from the η fear yarn mechanism 5 will be completely used for the sewing. As shown in "4th-1,4-2", when the aforementioned bottom yarn needle bar 2 exits the sewing position backwards, the first threading hole 50 0 of the yarn pulling arm 50, the second threading The hole 5 〇2 will gradually move through the arc-shaped convex portion 7 7 This paper size is suitable for the Chinese Β home kneading (CNS) Α4 specification (210X297 mm) --- i-i ·. 1 1 ϋ I-- -(Please read the $ item on the back and then fill in this page) II order ----- A tenth Ministry of Economic Affairs Central Consortium Bureau Industrial and Consumer Cooperatives printed A7 B7 Fifth, invention description (). 3, at this time The bottom yarn 6 will be hooked by the storage starting point 7 1 of the arc-shaped protrusion 7 3 as shown in the "Figure 4-2", so that the first fixing thread hole 53 is fixed to the nest 2 The length of the bottom yarn between the thread holes 54 is increased with the draw bow of the draw arm 50, and the yarn storage amount is increased. At this time, the contact point of the bottom yarn 6 and the flange 70 will gradually change direction. The release 2 at the same time tightens the bottom yarn 6 by the tension of the bottom yarn 6 to prevent the bottom yarn 6 from being gradually elongated loose or twisted together due to the inertia of the lotion at the previous yarn discharge Makes the bottom yarn sewn on the fabric taut, without There is a loose yarn floating phenomenon. As shown in "Figure 5-1, 5-2", when the aforementioned bottom yarn needle bar 2 is backed to the end, the first thread # 5 0 of the first threading yarn tie 5 0 1. The second threading hole 5 0 2 will move to the farthest position away from the yarn storage starting point 7 1, and the bottom yarn 6 will be elongated to the longest, while Qianwei 'is hooked at the bottom of the yarn storage starting point 7 1 The yarn 6 will also gradually slide to the release point 7 2, and then when the yarn pulling rod 50 swings to the rightmost end position in the figure, the release point 7 2 is instantaneously passed, and at this time in sequence The bottom yarn 6 passing through the first fixing thread hole 5 3, the first threading hole 5 0 1, the second thread threading hole 5 0 2, and the second fixing thread hole 5 4 is the longest and becomes the next The amount of thread required for the bottom yarn 6 in the secondary manufacturing operation. As shown in the "6-1, 6-2 diagram", it is another feasible embodiment of the aforementioned yarn storage plate 7, as shown in the figure, the storage The yarn board 8 mainly divides the aforementioned single-piece yarn storage board 7 into two corresponding front yarn storage boards 8 ΰ and rear yarn storage boards 8 1 in its longitudinal direction, and the two yarn storage boards 8 0 , 8 1 is connected to each other by a pivoting member 8 2 The relationship is pivotally connected, 8 paper scales are used in the Chinese National Standard (〇 阳) 84 specifications (210 father 297 mm)-_ --I β. -1 Yiyi i-(Jing Xianrun read the back Please fill out this page again) Order 3 ^ 0662 A7 B7 V. Description of invention (), where the pivoting element 8 2 may be a screw which passes through a circular hole of the front yarn storage plate 80 The front yarn storage plate 80 is pivotally connected to a narrow fe penetrating 8 1 1 of the rear yarn storage plate 8 1, and the front and rear yarn storage plates 80, 81 use the screw separately? 4 is installed on the sewing machine, so the user can loosen the screw 74 and move the front and rear yarn storage plates 80, if necessary. 1. It is possible to change the positions of the yarn storage starting point 71 and the release point 72 with respect to the yarn pulling arm 50, and adjust the yarn storage amount of the base yarn 6. Yarn storage start and release time to match the operation time of the bottom yarn needle bar 2. Similarly, as shown in "Figure 7", after loosening the screws 7 4, 7 4 ', the front and rear yarn storage plates 80, 81 are respectively screwed with the screws 7 4 or 7 4 'is the center of the rotating lotus motion, changing the angle between the front and rear yarn storage plates 80 and 81, so that the release point 72 is in the radial direction of the arcuate protrusion 7 3 and the first 3. The distance between the three fixed thread holes 5 3, 5 4 is changed, and the time when the bottom yarn 6 is released at the release point 72 is adjusted, and the storage amount of the bottom yarn 6 is adjusted to match the bottom yarn needle bar 2's action time. (Please read the note on the back ^ • item first and then fill out this page) The circular symbol description printed by the Central Bureau of Standards of the Ministry of Economic Affairs of the Negative Workers Consumer Cooperative: eccentric spindle · · · 1 bottom yarn needle bar ·. ··.. 2 Needle tip of the base yarn · · · · 2 1 Swivel shaft · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · • · · 4 cantilever · · · · · · · 4 0 ball joint · j · '• 40 0 connecting rod · · · · · · .. 4 ί yarn feed mechanism · · · 5 pull yarn arm... ... 5 0 The first threading hole ··· 50 1 The second threading hole · ••• 502 This paper scale is applicable to the Chinese National Standard (CNS) A4 specification (2 丨 0X297mm). Employee Consumer Cooperative Printed A7 B7 V. Description of invention () Fixing plate ····································· 52 ····· First fixed wire hole · ..53 · Second fixed wire hole ···· 54 Bottom yarn · · / · · · · · 6 Yarn storage plate · · · * .. 7 Flange .... '70 Yarn storage point ····· * 71 Release point ··· · ..72 arc-shaped protrusions, parts ·· •• · 73.wires ..... 74.screws .... 74, storage Gauze board * * · · · · 8 front yarn storage board · · · · 80 rear yarn storage board · · · 81 pivoting element, · · · · 82 long and narrow perforated · · 8 1 1! (Please read the notes on the back before filling out this page)
V 訂 Λ- 10 本紙張尺度逍用中國國家標準（CNS ) A4規格（21 OX 297公釐）V Order Λ- 10 The paper size is free to use the Chinese National Standard (CNS) A4 specification (21 OX 297 mm)