1231329 kl _B7 五、發明説明（1 ) 技術領域 本發明涉及錄齒形鎖縫縫初機等具有使升降的針左 右擺動的針擺動機構的縫紉機。 背景技術 過去，在鋸齒形鎖縫縫紉機中，為了形成鋸齒形鎖縫 等針擺動花樣’内置有使上下往復運動的針沿橫向往復運 動的針擺動裝置。 第6圖和第7圖表示這種現有的縫紉機的針擺動裝 置，在縫紉機主體1的内部，配置有針桿2，該針桿2借助針 桿驅動機構上下往復運動，而利用圖中未示出的上軸的旋 轉來驅動針桿驅動機構，在該針桿2上，以支撑前述針桿2 的上下位置的方式安裝大致形成C字形的針擺動臂3。在該 針擺動臂3上連接針擺動軸4的一個端部，該針擺動軸4利用 豎直設置在前述縫紉機主體1内側下面上的軸承體5，可沿 水平方向自由移動地支撐。並且，在前述針擺動軸4的另一 端上連接針擺動驅動連桿6的前端部，在該針擺動驅動連桿 6的基端部29上樞接針擺動支撐連桿8的前端部，所述針擺 動支撐連桿8的基端部30可自由擺動地軸支承在縫紉機主 體1上。 並且，在前述縫紉機主體丨的内部下方，配置有沿該 縫初機主體i的前後方向延伸的水平方向的凸輪驅動軸9, I 在該凸輪驅動軸9的後端上，在一側固定有形成所需形狀的 凸輪杉10的針擺動凸輪11。該針擺動凸輪丨1位於前述縫紉 機主體1的裏側，在該縫幼機主體W裏面安裝有覆蓋前述 ................ 1 ........ 本紙張尺度適用中國國家標準(CNS) Μ規格(210X297公楚)' —----1231329 kl _B7 V. DESCRIPTION OF THE INVENTION (1) Technical Field The present invention relates to a sewing machine having a needle swing mechanism that swings a raised and lowered needle, such as a tooth-shaped lockstitch initial sewing machine. BACKGROUND ART Conventionally, in a zigzag lockstitch sewing machine, a needle swinging device for moving a needle that reciprocates up and down in a lateral direction is built in to form a zigzag lockstitch pattern. 6 and 7 show such a conventional needle swinging device of a sewing machine. A needle bar 2 is arranged inside the sewing machine main body 1. The needle bar 2 is reciprocated up and down by a needle bar driving mechanism. The upper shaft is rotated to drive the needle bar driving mechanism. A needle swing arm 3 having a substantially C-shape is mounted on the needle bar 2 so as to support the vertical position of the needle bar 2. One end of a needle swinging shaft 4 is connected to the needle swinging arm 3, and the needle swinging shaft 4 is supported by a bearing body 5 provided vertically on the underside of the inside of the aforementioned sewing machine main body 1 so as to be freely movable in the horizontal direction. The other end of the needle swing shaft 4 is connected to the front end portion of the needle swing drive link 6, and the base end portion 29 of the needle swing drive link 6 is pivotally connected to the front end portion of the needle swing support link 8. The base end portion 30 of the needle swing support link 8 is pivotally supported on the sewing machine body 1 so as to be swingable. Further, a horizontal cam drive shaft 9 extending along the front-back direction of the sewing machine main body i is disposed below the inside of the sewing machine main body 丨, and a rear end of the cam drive shaft 9 is fixed on one side The needle of the cam fir 10 formed into a desired shape swings the cam 11. The needle swing cam 丨 1 is located on the back side of the sewing machine main body 1, and the sewing machine main body W is provided with a cover covering the aforementioned ... 1 ... . This paper size is applicable to Chinese National Standard (CNS) M specification (210X297). —----
•訂— (請先閱讀背面之注意事項再填寫本頁) 而且，通 1231329 κι — —義· Β7 五、發明説明（2) 針擺動凸輪11的側蓋12。1且，前述凸輪驅動轴9的前端部 安裝有凸輪驅動齒輪13，傳動齒輪14口齒合於該凸輪驅動齒 輪13上進而，在該傳動齒輪14上以同軸的方式安裝蜗輪 15，所述渦輪15連接到在前述上軸旋轉的同時旋轉被旋轉 驅動的圖中未示出的針筒的下轴上，利用前述下轴的旋轉 驅動，通過蝸輪15、傳動齒輪14和凸輪驅動齒輪13旋轉驅 動前述凸輪驅動軸9,借此，使前述針擺動凸輪η旋轉驅動。 在前述針擺動凸輪η的前面附近，配置凸輪臂16，在 該凸輪臂16的前端部上突出設置與前述針擺動凸輪η的凸 輪槽10配合的凸輪從動件17。該凸輪槽1〇從其凸輪驅動軸9 的軸線起的半徑方向的距離，在繞該軸線的圓周方向上不 同。在刖述凸輪臂16的基端部上，安裝沿前述縫紉機主體1 的前後方向延伸的針擺動驅動軸18，通過前述凸輪臂16的 凸輪從動件17沿針擺動凸輪u的凸輪槽1〇的從動，對凸輪 臂16進行擺動驅動，前述針擺動驅動軸18進行往返角位移 並旋轉操作。 進而，在前述針擺動驅動軸18的前端部分上固定有針 擺動驅動臂19的基端部，在該針擺動驅動臂〗9的前端部上 連接針擺動桿7的基端部，所述針擺動桿7的前端部連接到 前述針擺動驅動連桿6的中間部上。 在這種現有的針擺動裝置中，當利用前述上軸的旋轉 驅動對前述下軸進行旋轉驅動時，前述蝸輪15被旋轉驅 動，該旋轉力通過傳動齒輪14傳遞給凸輪驅動齒輪13，旋 轉驅動凸輪驅動軸9並且旋轉驅動針擺動凸輪丨j。 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公楚）• Order — (Please read the precautions on the back before filling this page) And, 1231329 κι — — Meaning · Β7 V. Description of the invention (2) Side cover 12 of the needle swing cam 11. 1 And, the aforementioned cam drive shaft 9 A cam driving gear 13 is mounted on a front end portion thereof, and a transmission gear 14 is meshed with the cam driving gear 13. Further, a worm gear 15 is coaxially mounted on the transmission gear 14, and the turbine 15 is connected to the upper shaft rotating At the same time, the lower shaft of a syringe, which is not shown in the drawing, is rotated at the same time, and the aforementioned cam drive shaft 9 is rotationally driven by the worm gear 15, the transmission gear 14, and the cam drive gear 13 by the aforementioned rotation drive of the lower shaft, thereby, The aforementioned needle swing cam η is rotationally driven. A cam arm 16 is disposed near the front face of the needle swing cam η, and a cam follower 17 that protrudes from the cam groove 10 of the needle swing cam η is protruded at a front end portion of the cam arm 16. The radial distance of the cam groove 10 from the axis of the cam drive shaft 9 is different in the circumferential direction around the axis. A needle swing driving shaft 18 extending in the front-rear direction of the sewing machine main body 1 is attached to a base end portion of the cam arm 16 described above, and a cam follower 17 of the cam arm 16 swings a cam groove 1 of the cam u along the needle. Followed by, the cam arm 16 is swing-driven, and the aforementioned needle swing drive shaft 18 performs a reciprocating angular displacement and rotates. Further, a base end portion of the needle swing driving arm 19 is fixed to a front end portion of the needle swing driving shaft 18, and a base end portion of the needle swing lever 7 is connected to a front end portion of the needle swing driving arm 9 and the needle The front end portion of the swing lever 7 is connected to the middle portion of the aforementioned needle swing drive link 6. In such a conventional needle swinging device, when the lower shaft is rotationally driven by the rotational driving of the upper shaft, the worm gear 15 is rotationally driven, and the rotational force is transmitted to the cam driving gear 13 through the transmission gear 14 and rotationally driven. The cam drives the shaft 9 and rotates the drive pin to swing the cam ij. This paper size applies to China National Standard (CNS) A4 (210X297)
訂— · (請先閱讀背面之注意事項再填寫本頁) 1231329 A7 ^ ----^〜_ B7 五、發明說明（3 ) 過凸輪從動件17追隨由於前述針擺動凸輪u的旋轉而旋轉 的凸輪槽10，使前述凸輪臂16擺動，借此，通過針擺動驅 動軸18使針擺動驅動臂19擺動，使針擺動桿7上下往復運 動。當該針擺動桿7的上下往復運動傳遞給前述針擺動驅動 連桿6時，利用針擺動支撐連桿8的擺動操作使前述針擺動 驅動連桿6沿水平方向移動，因此，前述針擺動軸4沿軸向 運動，通過針擺動臂3使針桿2沿水平方向移動並進行針擺 動操作，可以形成鋸齒形鎖縫等所需的針擺動花樣。 第8圖疋表示鑛齒形鎖縫縫纫機的針跡圖案的例子。 雜齒形鎖縫縫紉機1是平縫縫鲂機，針每上下運動一次運 動，通過使上線與下線纏繞而形成針腳。作為針跡圖案， 例如針母上下運動一次，通過使針或左或右地交替擺動， 如第8A圖所示，形成作為鋸齒形圖案的兩點鋸齒。 並且’若在鋸齒中央上下運動一次，則如第8圖所示 形成二點鋸齒，若上下運動兩次，則形成如第8圖所示的四 點鋸齒。此外，還存在扇形縫等。這樣，在鋸齒形鎖縫縫 紉機中，可以形成伸縮性大、寬度寬的針腳、花樣鎖縫。 這樣，由相對於針上下運動的左右的針擺動圖案所確 定的針跡圖案的左右針擺動圖案，是由凸輪η來確定的。 由於當上軸旋轉一周時針上下運動一次，所以上軸每運動 一次，若採用針左右交替擺動的凸輪1 1則形成兩點鋸齒。 這樣，利用凸輪11來決定針跡圖案，在變換針跡圖案 時’有必要更換凸輪。但是，在更換凸輪i丨時’不得不卸 下螺栓以便更換凸輪11，不能彳艮容易地改變針跡圖案。 本紙張尺度適用中國國家標準（CNS) A4規格（2WX297公楚） 6 (請先閱讀背面之注意事項再填寫本頁) •訂— 1231329 A7 ___ B7 五、發明説明（4 ) 因此，鑒於上述問題，在特開平10—249079中公開了 可以簡單地更換凸輪以便可以改變針跡圖案的鋸齒形鎖縫 紉機。第9圖是表示這樣的縫紉機凸輪裝置2〇的結構的平面 圖。 在凸輪裝置20中，具有第一和第二兩個凸輪2丨、22以 及凸輪體25。第一和第二凸輪21、22以一定間隔對向配置， 成一體地旋轉。凸輪21、22為槽凸輪，在表面上形成環形 凸輪槽。凸輪21、22以與凸輪槽26、27對向的方式配置。 凸輪體25具有與第一和第二凸輪2丨、22對應的第一和第二 凸輪從動件23、24，可前後移動地設置。凸輪從動件23、 24配置在凸輪21、22之間，當凸輪體25例如向後方移動時， 凸輪體25的第一凸輪從動件23嵌入到第一凸輪21的凸輪槽 26中，針擺動機構20隨第一凸輪21進行針擺動運動。 相反’右凸輪體2向靠近操作者一方移動，則第二凸 輪從動件24嵌入到第一凸輪22的凸輪槽27中，隨著第-凸 輪22進行針擺動運動。這樣，通過使凸輪體乃移動，可以 容易地更換凸輪，易於進行針跡圖案的變換。 進而，在一對凸輪21、22中，配置在外側的第二凸輪 22通過拆下螺栓28可以更換為其他凸輪。因此，可以變換 三種以上的針跡圖案。 作為與該現有的凸輪裝置類似的技術，還有特開平8 一117463 。 在上述凸輪裝置20中，作為凸輪採用的是槽凸輪。槽 凸輪是在圓板上的凸輪表面中呈環狀形成凸輪槽的凸輪。 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公楚) ~ ~ " --------- (請先閱讀背面之注意事項再填寫本頁)Order — · (Please read the precautions on the back before filling this page) 1231329 A7 ^ ---- ^ ~ _ B7 V. Description of the invention (3) The cam follower 17 follows the rotation of the needle swing cam u as described above. The rotating cam groove 10 swings the cam arm 16, whereby the needle swing driving shaft 19 is swung by the needle swing driving shaft 18, and the needle swing lever 7 is reciprocated up and down. When the up-and-down reciprocating motion of the needle swing lever 7 is transmitted to the needle swing drive link 6, the needle swing drive link 6 is moved in the horizontal direction by the swing operation of the needle swing support link 8. Therefore, the needle swing shaft 4 Movement in the axial direction, the needle bar 2 is moved in the horizontal direction by the needle swing arm 3, and the needle swing operation is performed, so that a desired needle swing pattern such as a zigzag lock seam can be formed. Fig. 8 (a) shows an example of a stitch pattern of a dentition sewing machine. The zigzag lockstitch sewing machine 1 is a flat-stitch sewing machine. Each time the needle moves up and down, the upper and lower threads are entangled to form stitches. As the stitch pattern, for example, the needle mother moves up and down once, and by alternately swinging the needle to the left or right, as shown in FIG. 8A, two-point sawtooth is formed as a zigzag pattern. Also, if one moves up and down in the center of the saw tooth once, a two-point saw tooth is formed as shown in FIG. 8, and if it moves twice up and down, a four-point saw tooth is formed as shown in FIG. There are also fan-shaped seams and the like. In this way, in a zigzag-shaped seam sewing machine, stitches and patterns with large stretchability and wide width can be formed. In this way, the left and right needle swing patterns of the stitch pattern determined by the left and right needle swing patterns that move up and down the needle are determined by the cam η. Since the needle moves up and down once when the upper shaft rotates for one revolution, each time the upper shaft moves, if the cam 1 1 which alternately swings the left and right needles is used, two-point sawtooth is formed. Thus, the cam 11 is used to determine the stitch pattern, and it is necessary to replace the cam when the stitch pattern is changed. However, when the cam is replaced, the bolt has to be removed to replace the cam 11, and the stitch pattern cannot be easily changed. This paper size applies Chinese National Standard (CNS) A4 specification (2WX297). 6 (Please read the notes on the back before filling this page) • Order — 1231329 A7 ___ B7 V. Description of the invention (4) Therefore, in view of the above problems Japanese Unexamined Patent Publication No. 10-249079 discloses a zigzag lock sewing machine that can simply change the cam so that the stitch pattern can be changed. Fig. 9 is a plan view showing the structure of such a cam device 20 for a sewing machine. The cam device 20 includes first and second cams 21 and 22, and a cam body 25. The first and second cams 21 and 22 are opposed to each other at a certain interval and integrally rotate. The cams 21 and 22 are grooved cams, and an annular cam groove is formed on the surface. The cams 21 and 22 are arranged so as to face the cam grooves 26 and 27. The cam body 25 has first and second cam followers 23, 24 corresponding to the first and second cams 21, 22, and is provided so as to be movable forward and backward. The cam followers 23 and 24 are arranged between the cams 21 and 22. When the cam body 25 moves backward, for example, the first cam follower 23 of the cam body 25 is fitted into the cam groove 26 of the first cam 21, and the needle The swing mechanism 20 performs a needle swing motion with the first cam 21. On the other hand, when the right cam body 2 is moved closer to the operator, the second cam follower 24 is fitted into the cam groove 27 of the first cam 22, and the needle cam moves with the first cam 22. Thus, by moving the cam body, the cam can be easily replaced, and the stitch pattern can be easily changed. Furthermore, of the pair of cams 21 and 22, the second cam 22 disposed on the outside can be replaced with another cam by removing the bolt 28. Therefore, more than three stitch patterns can be changed. As a technology similar to this existing cam device, there is Japanese Patent Application Laid-Open No. 8-117463. In the cam device 20 described above, a slot cam is used as the cam. The groove cam is a cam in which a cam groove is formed in a ring shape in a cam surface of a circular plate. This paper size applies to China National Standard (CNS) A4 specifications (210X297). ~ ~ &Quot; --------- (Please read the precautions on the back before filling this page)
1231329 A7 ' ' --*----— Β7____ 五、發明説明（5) --—- 凸輪從動件嵌入到該凸輪槽中，凸輪槽的内面或外面具有 作為凸輪面的功能。 這種槽凸輪有必要像上述那樣在表面上呈環狀形成 凸輪槽即凸輪的外徑比凸輪面大。當凸輪的外徑大時， 容納該凸輪的縫紉機主體也只能增大，最終使縫紉機整體 大型化。並且，因此使重量也變大。 發明内容 、本發明的目的是提供一種縫紉機，其是在可更換凸輪 並可更換至少一個凸輪的縫切機中，使凸輪較小而可以小 型化。 本發明所請之縫紉機配有··縫紉機本體；旋轉以便驅 動針上下運動的上軸；與上軸的旋轉連動地旋轉的凸輪； 以及隨著凸輪的旋轉而運動且使升降的針左右擺動的針擺 動裝置；其特徵為： 刖述凸輪設置有多個，其中至少一個係配置於縫紉機 本體外側且可更換； 刖述針擺動裳置係透過移動而可以切換任一個凸輪； 刖述多個凸輪中的至少一個係配置於前述壁部之内 測，且為凸輪外周部全周上具有向凸輪的旋轉軸線方向突 出的凸緣的凸緣凸輪； 刖述針擺動裝置具有夾持前述凸緣凸輪的凸緣的一 對凸輪從動件。 本發明的前述多個凸輪可為兩個，且兩個凸輪均為前 述凸緣凸輪。 丨丨-" 丨丨丨·丨 · _丨 本紙張尺度賴巾酬家#i^CNS) A4規格⑵0X297公& --1231329 A7 ''-* ----— Β7 ____ 5. Description of the invention (5) --- The cam follower is embedded in the cam groove, and the inner surface or the outer surface of the cam groove has the function of a cam surface. It is necessary for such a slot cam to be formed in a ring shape on the surface as described above. That is, the cam groove has a larger outer diameter than the cam surface. When the outer diameter of the cam is large, the main body of the sewing machine accommodating the cam can only be enlarged, and eventually the entire sewing machine becomes large. In addition, the weight is also increased. SUMMARY OF THE INVENTION An object of the present invention is to provide a sewing machine which can make a cam smaller and can be miniaturized in a sewing machine in which a cam can be replaced and at least one cam can be replaced. The sewing machine according to the present invention is provided with a sewing machine body; an upper shaft that rotates to drive the needle to move up and down; a cam that rotates in conjunction with the rotation of the upper shaft; and a cam that moves with the rotation of the cam and swings the lifted needle to the left and right Needle swinging device; characterized in that: there are multiple cams, at least one of which is arranged outside the sewing machine body and is replaceable; the needle swinging mechanism can switch any one of the cams by moving; At least one of them is a flange cam that is disposed inside the aforementioned wall portion and has a flange that protrudes in the direction of the rotation axis of the cam on the entire periphery of the cam; the needle swinging device has the flange cam A pair of flanged cam followers. The aforementioned plurality of cams of the present invention may be two, and both cams are the aforementioned flange cams.丨 丨-" 丨 丨 丨 · 丨 _ 丨 This paper size Lai Jinjiao # i ^ CNS) A4 specifications ⑵0X297 male &-
t · (請先閲讀背面之注意事項再填寫本頁) 1231329 A7 B7 五、發明説明（6 ) 本發明的前述多個凸輪可為兩個，且一個凸輪為前述 凸緣凸輪，另一個凸輪為具有凸輪槽的槽凸輪。 根據本發明，作為針擺動機構的凸輪採用凸緣凸輪。 凸緣凸輪是在圓板上的外周上具有凸緣的凸輪，該凸緣由 一對凸輪從動件夾持。即，凸緣的内面和外面具有作為凸 輪面的功能。在現有技術中，由於採用槽凸輪，所以凸輪 的外徑比凸輪面大，而對於凸緣凸輪，凸輪的外徑可以具 有與凸輪面相同的大小。即，與現有技術相比，凸輪的直 徑可以減小，因而可以使縫紉機結構小型化。 附圖說明 第1圖是作為本發明的一個實施形式的鋸齒形鎖縫縫 紉機30的正面剖視圖。 第2圖是從第1圖的剖面線Π — π觀察的剖視圖。 第3圖是縫初機3 0的水平剖視圖。 第4圖是縫紉機30的一部分的分解透視圖。 第5圖是表示具有兩個凸緣凸輪42的凸輪裝置的剖視 圖 第6圖是現有的鋸齒形鎖縫縫紉機1正面剖視圖。 第7圖是鋸齒形鎖縫縫紉機1的側面剖視圖。 第8A至8C圖是表示鋸齒形鎖縫縫紉機的針跡花樣的 圖示。 第9圖是另一個現有技術的凸輪裝置20的結構的 示0 具體實施形式 本紙張尺度適用中國國家標準（CNS) A4规格（210X297公釐） 圖 9 (請先閲讀背面之注意事項再填寫本頁) 訂— 五、發明説明（7) 第1圖疋表不作為本發明的一個實施形式的鋸齒形鎖 縫縫紉機30的結構的正視剖視圖，第2圖是從第丨圖的剖面 線II —II看到的剖視圖。第3圖是縫紉機30的水平剖視圖， 第4圖是縫紉機30的一部分的分解透視圖。另外，在這些圖 中，左右方向是在第〗圖紙面中的左右方向，上下方向是在 第1圖紙面中的上下方肖，前後方向是在第2圖紙面中的左 右方向。 在中空的縫紉機主體3丨中，沿著在左右方向上延伸的 縫紉機臂部配置上軸32，並進行可自由旋轉地支撐。在上 軸32的第1圖中的左侧端部上安裝針桿曲柄軸33，在針桿曲 柄軸33上，通過針桿曲柄桿38和針桿抱緊部件”連接有針 桿34。針桿34在其下端部固定著針35，利用針桿架36可上 下移動地進行支撐。因而，當利用驅動源旋轉驅動上軸32 時，通過針桿曲柄軸33使針桿34和針35同時上下運動。 其次，對凸輪裝置40進行說明。凸輪裝置4〇具有針擺 動機構和凸輪切換機構。首先對針擺動機構進行說明。 針擺動機構配有一對凸輪41、42，和追隨凸輪41、42 的旋轉而運動、使升降的針35左右擺動的針擺動機構43。 凸輪41、42與上軸32同步旋轉。針擺動機構43包括··具有 凸輪從動件的針擺動凸輪臂45、針擺動驅動桿46、針桿軛 (3 —夕）47和針桿架軸48。 在凸輪41、42中，配置在縫紉機本體31之壁部95後面 的凸輪41為可更換的槽凸輪，配置在縫紉機本體31之壁部 95前方的凸輪42為被固定的凸緣凸輪。這兩個凸輪41、42 1231329 κι Β7 五、發明説明（8 ) 構成一體並圍繞凸輪軸75旋轉。 針擺動凸輪臂45具有槽凸輪41用的凸輪從動件50、和 凸緣凸輪42用的凸輪從動件51、52，該針擺動凸輪臂45可 沿前後方向移動地被支撐，通過前後移動，對凸輪從動件 50、51、52、槽凸輪41和凸緣凸輪42進行切換並從動。 針擺動凸輪臂45沿左右方向延伸，被設置在左側端部 上的針擺動驅動軸62可自由旋轉地支撐在縫紉機主體31 上，在右側端部設置有凸輪從動件50〜52。凸輪從動件50 〜52隨著凸輪41或凸輪42的槽形或凸緣形的各凸輪面上下 運動。即，針擺動凸輪臂45隨著凸輪41、42的旋轉，以針 擺動驅動軸62為旋轉中心，其右側端部上下運動。 針擺動驅動臂53由連接軸64連接到針擺動凸輪臂45 上，與針擺動凸輪臂45成一體地上下運動。在該針擺動驅 動臂53上通過連接軸65連接有針擺動驅動桿46。在針擺動 驅動桿46上形成長孔54，凸輪軸75貫穿于該長孔54中，可 上下移動地支撐針擺動驅動桿46。該針擺動驅動桿46的上 端部通過連接軸66可自由旋轉地連接到針桿軛47的中央部 上。針桿軛47以其中央向上彎曲的方式向左右方向延伸， 右側端部以在鋸齒調節部Ζ的軸Ζ1的軸線上可移動的方式 支撐在縫紉機主體31上。 在針桿軛47的左端部上，通過針桿軛連接件61用銷55 連接有針桿架軸48。針桿架軸48可向左右方向移動地支撐 在縫紉機主體31上，左側端部連接到針桿架36上。利用這 種結構，當凸輪41、42旋轉且針擺動驅動桿46上下運動時， 本紙張尺度適用中國國家標準（CNS) Α4規格（210X297公釐） 11 (請先閱讀背面之注意事項再填寫本頁) •訂_ 1231329t · (Please read the precautions on the back before filling this page) 1231329 A7 B7 V. Description of the invention (6) The aforementioned multiple cams of the present invention can be two, and one cam is the aforementioned flange cam, and the other cam is Slot cam with cam slot. According to the present invention, a flange cam is used as a cam of the needle swing mechanism. The flange cam is a cam having a flange on the outer periphery of a circular plate, and the flange is held by a pair of cam followers. That is, the inner surface and the outer surface of the flange function as a cam surface. In the prior art, since a grooved cam is used, the outer diameter of the cam is larger than that of the cam surface, and for a flanged cam, the outer diameter of the cam may have the same size as the cam surface. That is, compared with the prior art, the diameter of the cam can be reduced, so that the structure of the sewing machine can be miniaturized. Brief Description of the Drawings Fig. 1 is a front sectional view of a zigzag lockstitch sewing machine 30 according to an embodiment of the present invention. Fig. 2 is a cross-sectional view viewed from the section line Π-π in Fig. 1. Fig. 3 is a horizontal cross-sectional view of the initial sewing machine 30. FIG. 4 is an exploded perspective view of a part of the sewing machine 30. Fig. 5 is a sectional view showing a cam device having two flange cams 42. Fig. 6 is a front sectional view of a conventional zigzag sewing machine 1. Figs. FIG. 7 is a side sectional view of the zigzag lockstitch sewing machine 1. FIG. Figures 8A to 8C are diagrams showing stitch patterns of a zigzag lockstitch sewing machine. Figure 9 shows the structure of another cam device 20 in the prior art. Specific implementation form The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) Figure 9 (Please read the precautions on the back before filling in this (Page) Order — V. Description of the invention (7) FIG. 1 is a front cross-sectional view showing the structure of a zigzag lockstitch sewing machine 30 as an embodiment of the present invention, and FIG. 2 is a cross-sectional line II—II from FIG. 丨Seen in cross section. FIG. 3 is a horizontal sectional view of the sewing machine 30, and FIG. 4 is an exploded perspective view of a part of the sewing machine 30. In these drawings, the left-right direction is the left-right direction on the first drawing surface, the up-down direction is the upper-lower direction on the first drawing surface, and the front-rear direction is the left-right direction on the second drawing surface. In the hollow sewing machine main body 3, an upper shaft 32 is arranged along the sewing machine arm portion extending in the left-right direction, and is rotatably supported. A needle bar crank shaft 33 is attached to the left end of the upper shaft 32 in the first figure, and a needle bar 34 is connected to the needle bar crank shaft 33 via the needle bar crank rod 38 and the needle bar holding member. The needle 34 is fixed to the lower end of the lever 34 and supported by the needle bar holder 36 so that it can move up and down. Therefore, when the upper shaft 32 is rotationally driven by the driving source, the needle bar 34 and the needle 35 are simultaneously driven by the needle crank shaft 33 Next, the cam device 40 will be described. The cam device 40 has a needle swing mechanism and a cam switching mechanism. First, the needle swing mechanism will be described. The needle swing mechanism is provided with a pair of cams 41 and 42 and a follower cam 41 and 42 The needle swing mechanism 43 which moves and rotates and raises and lowers the needle 35 to the left and right. The cams 41 and 42 rotate synchronously with the upper shaft 32. The needle swing mechanism 43 includes a needle swing cam arm 45 having a cam follower and a needle swing Drive rod 46, needle bar yoke (3-night) 47, and needle bar holder shaft 48. Among the cams 41 and 42, the cam 41 disposed behind the wall portion 95 of the sewing machine body 31 is a replaceable slot cam and is disposed on the sewing machine. The cam 42 in front of the wall portion 95 of the body 31 is Fixed flange cams. The two cams 41, 42 1231329 κι B7 5. Description of the invention (8) are integrated and rotate around the cam shaft 75. The needle swing cam arm 45 has a cam follower 50 for the slot cam 41, The cam followers 51 and 52 for the flange cam 42 are supported by the needle swing cam arm 45 so as to be movable in the front-back direction. The cam followers 50, 51, 52, the slot cam 41, and the cam The edge cam 42 is switched and driven. The needle swing cam arm 45 extends in the left-right direction, and a needle swing driving shaft 62 provided on the left end is rotatably supported on the sewing machine main body 31. A cam is provided on the right end Followers 50 to 52. The cam followers 50 to 52 follow the grooved or flanged cam surfaces of the cam 41 or cam 42. That is, the needle swing cam arm 45 rotates with the cams 41 and 42 With the needle swing driving shaft 62 as the rotation center, the right end portion moves up and down. The needle swing driving arm 53 is connected to the needle swing cam arm 45 by a connecting shaft 64 and moves up and down integrally with the needle swing cam arm 45. Here Needle swing drive arm 53 passes The shaft 65 is connected to the needle swing driving lever 46. A long hole 54 is formed in the needle swing driving lever 46, and the cam shaft 75 penetrates through the long hole 54 to support the needle swing driving lever 46 up and down. The needle swing driving lever The upper end portion of 46 is rotatably connected to the central portion of the needle bar yoke 47 via a connecting shaft 66. The needle bar yoke 47 extends in the left-right direction with its center bent upward, and the right end portion is in the axis of the zigzag adjusting portion Z. The axis of Z1 is movably supported on the sewing machine main body 31. On the left end of the needle bar yoke 47, a needle bar frame shaft 48 is connected with a pin 55 via a needle bar yoke connector 61 with a pin 55. The needle bar frame shaft 48 is supported on the sewing machine main body 31 so as to be movable in the left-right direction, and the left end portion is connected to the needle bar frame 36. With this structure, when the cams 41 and 42 rotate and the needle swing drive lever 46 moves up and down, the paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 11 (Please read the precautions on the back before filling in this Page) • Order _ 1231329
五、發明説明（9) 通過針桿軛47使針桿架軸48左右運動，借此，針桿34和針 35可以向第1圖和第3圖的左右方向擺動。 其次’說明凸輪裝置40的凸輪切換機構。 槽凸輪41和凸緣凸輪42共同具有凸輪軸75，以縫紉機 本體3 1之壁部95的外側與内側間具有間隙的方式配置。槽 凸輪41在圓板的内面（凸緣凸輪側表面）上呈環狀地形成凸 輪槽76。與該凸輪槽76面對地配有槽凸輪用凸輪從動件 50。凸緣凸輪42在圓板78的外周部全周上形成向旋轉軸線 方向（凸輪軸方向）突出的凸緣77,形成大致的圓筒狀。凸 緣凸輪用凸緣從動件51、52，可以夾持該凸緣77，即，具 有與凸緣77的厚度基本相同的間隔地安裝在針擺動凸輪臂 45上。該凸緣77的内表面86和外表面87用凸輪面。 在針擺動凸輪臂45的左端部，貫穿沿前後方向延伸的 針擺動驅動軸62,可前後滑動地設置，通過切換滑動軸82， 使針擺動凸輪45前後滑動。切換滑動軸82沿上下方向延 伸，可繞切換滑動軸82的軸線自由旋轉地支撐在縫紉機主 體31。在其上端部固定有操作桿85，在下端部形成曲柄部 I 83。在該曲柄部83上可自由旋轉地連接有作為移動片的長 方形的方形板牙81。 在針擺動凸輪臂45的左端部的上部，形成由一對平行 板構成的槽狀方形板牙導向部80,方形板牙81嵌入其中。 因此，當操作切換桿85以使切換滑動軸82角位移時，通過 曲轴部8 3使方形板牙81在導向部8 0内前後運動，借此，針 擺動凸輪臂45沿軸62前後滑動。當針擺動凸輪臂45向前方 本紙張尺度適用中國國家標準（CNS) A4規格(2]0X297公爱) --V. Description of the Invention (9) The needle bar yoke 47 is moved left and right by the needle bar yoke 47, whereby the needle bar 34 and the needle 35 can be swung in the left-right direction of FIGS. 1 and 3. Next, the cam switching mechanism of the cam device 40 will be described. The slot cam 41 and the flange cam 42 have a cam shaft 75 in common, and are arranged so that there is a gap between the outside and the inside of the wall portion 95 of the sewing machine body 31. The groove cam 41 has a convex groove 76 formed in an annular shape on the inner surface (side surface of the flange cam) of the circular plate. A cam follower 50 for a slot cam is provided so as to face the cam slot 76. The flange cam 42 forms a flange 77 projecting in the rotation axis direction (cam axis direction) over the entire periphery of the outer peripheral portion of the circular plate 78, and has a substantially cylindrical shape. The flange cam followers 51 and 52 can hold the flange 77, that is, the flange followers 51 and 52 are mounted on the needle swing cam arm 45 at substantially the same interval as the thickness of the flange 77. Cam surfaces are used for the inner surface 86 and the outer surface 87 of the flange 77. At the left end of the needle swing cam arm 45, a needle swing driving shaft 62 extending in the front-rear direction is provided so as to be slidable forward and backward. By switching the slide shaft 82, the needle swing cam 45 is slid back and forth. The switching slide shaft 82 extends in the up-down direction, and is supported by the sewing machine main body 31 so as to be rotatable about the axis of the switching slide shaft 82. An operation lever 85 is fixed to an upper end portion thereof, and a crank portion I 83 is formed at a lower end portion. A rectangular plate die 81 as a moving piece is rotatably connected to the crank portion 83. On the upper part of the left end portion of the needle swing cam arm 45, a slot-shaped square die guide 80 composed of a pair of parallel plates is formed, and a square die 81 is fitted therein. Therefore, when the switching lever 85 is operated to angularly displace the switching slide shaft 82, the square die 81 is moved back and forth within the guide portion 80 by the crankshaft portion 83, whereby the needle swing cam arm 45 slides back and forth along the shaft 62. When the needle swings the cam arm 45 to the front This paper size applies to Chinese National Standard (CNS) A4 specifications (2) 0X297 public love)-
----......... (請先閲讀背面之注意事項再填寫本頁) 1231329 A7 -~ ___ B7 五、發明説明（10 ) 滑動時，凸緣凸輪用凸輪從動件51、52夾住凸緣凸輪42的 凸緣77，切換至凸緣凸輪42，當針擺動凸輪臂45向後方滑 動時，槽凸輪用凸輪從動件50進入槽凸輪41的槽76，切換 至槽凸輪41。 凸輪轴75的後方通過槪套96支推於縫初機主體31的 壁部95上，在該壁部95的内側（前方）設置凸緣凸輪42，在 外側（後方）設置槽凸輪41。如從圖中可判斷出的那樣，槽 凸輪41比凸輪凸緣42的外徑大。由於外徑小的凸緣凸輪42 配置在壁部95的内側，所以可以減小縫紉機主體3丨。並且， 槽凸輪41在壁部95的外側通過固定在凸輪軸75上的凸輪支 承構件70，用螺栓1 〇〇可自由拆卸地固定。即，通過從凸輪 支承構件70卸下螺栓1〇〇，可以容易地更換外侧的槽凸輪 41。另外，外側的槽凸輪41被可以拆卸的蓋88蓋住。 在凸輪軸75上，通過凸輪支承構件92固定蝸輪90。並 且’在上軸32上固定作為與凸輪蝸輪9〇嚙合的蝸桿的上軸 齒輪91。因此，當利用驅動源旋轉上軸32時，凸輪41、42 旋轉。 並且’在本實施例中，利用最為頻繁的兩點鋸齒針跡 花樣（參照第8A圖）的凸輪為可以從凸輪軸75上更換的槽凸 輪41 ’利用率較小的四點鋸齒針跡花樣（參照第8(：圖）的凸 輪為固定在凸輪軸75上的凸緣凸輪42。 在鑛齒形鎖縫縫紉機30中，利用驅動源旋轉驅動上軸 32 ’利用該上軸32的旋轉，曲柄機構33、38沿上下方向56 往復驅動可拆卸、更換地安裝有針35的針桿34，使所述針 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公爱）----......... (Please read the precautions on the back before filling out this page) 1231329 A7-~ ___ B7 V. Description of the invention (10) When sliding, the cam follower for the flange cam 51 and 52 clamp the flange 77 of the flange cam 42 and switch to the flange cam 42. When the needle swing cam arm 45 slides backward, the groove cam follower 50 enters the groove 76 of the groove cam 41 and switches to Slot cam 41. The rear of the cam shaft 75 is urged against the wall portion 95 of the sewing machine main body 31 via a cymbal sleeve 96. A flange cam 42 is provided on the inside (front) of the wall portion 95 and a groove cam 41 is provided on the outside (rear). As can be seen from the figure, the groove cam 41 has a larger outer diameter than the cam flange 42. Since the flange cam 42 having a small outer diameter is disposed inside the wall portion 95, the sewing machine main body 3 丨 can be reduced. The grooved cam 41 is detachably fixed to the cam shaft 75 outside the wall portion 95 by a cam support member 70 fixed to the cam shaft 75. That is, by removing the bolt 100 from the cam supporting member 70, the outer grooved cam 41 can be easily replaced. In addition, the outer groove cam 41 is covered by a removable cover 88. The worm gear 90 is fixed to the cam shaft 75 by a cam support member 92. And, an upper shaft gear 91 serving as a worm meshing with the cam worm gear 90 is fixed to the upper shaft 32. Therefore, when the upper shaft 32 is rotated by the driving source, the cams 41 and 42 rotate. And 'In this embodiment, the cam that uses the most frequent two-point zigzag stitch pattern (refer to FIG. 8A) is a slot cam 41 that can be replaced from the camshaft 75.' The four-point zigzag stitch pattern with low utilization (Refer to FIG. 8 (: FIG.) The cam is a flange cam 42 fixed to a camshaft 75. In the ore tooth lock sewing machine 30, the upper shaft 32 is rotationally driven by a drive source, and the upper shaft 32 is rotated. The crank mechanisms 33 and 38 reciprocally drive the needle bar 34 with the needle 35 detachably and replaceably mounted in the up-down direction 56 so that the paper size of the needle applies the Chinese National Standard (CNS) A4 specification (210X297)
L.--- (請先閱讀背面之注意事項再填寫本頁) -訂· 1231329 A7 五、發明説明（η ) 桿34可以沿左右方向57往復運動。針桿架軸48配置在上軸 32的下方，一端部固定在針桿34上，沿左右方向57延伸。 針桿軛47，其一端部可角位移地支撐在縫紉機主體31上， 另一端利用銷55可角位移地連接到針桿架軸48上。凸輪軸 75具有沿前後方向58延伸的軸線，通過齒輪組90、91連接 到上軸3 2上。 針擺動驅動桿46，其一端部由第一連接軸66在針桿輛 47的前述一端部和前述另一端部之間可角位移地連接到針 桿軛47上，該針擺動驅動桿46的長孔54貫穿凸輪軸75，形 成沿上下方向56的細長狀。針擺動驅動軸53，其一端部由 第二連接轴65可角位移地連接到針擺動驅動桿46的另一端 上。針擺動驅動軸62設置在縫紉機主體31上，具有沿前後 方向58延伸的軸線，可角位移地支撐針擺動驅動軸53的另 一端。 針擺動凸輪臂45，其一端部可沿針擺動驅動轴62的軸 線相互移動，並且，被可繞針擺動驅動軸62的軸線相互角 位移地支撐，防止圍繞針擺動驅動軸62軸線的相對於針擺 動驅動軸5 3的角位移。 在一對凸輪41、42之中，至少一個凸輪為凸緣凸輪。 凸輪41、42被凸輪軸75貫穿，固定在凸輪軸75上，各凸輪 41、42，在一對各凸輪41、42的對向側上分別具有圍繞凸 輪軸75的環狀凸輪面。至少一個凸輪41可以相對於凸輪軸 75進行拆、裝更換。在這些凸輪41、42之間配置針擺動凸 輪臂45的另一端部。一對從動件50 ; 51、52分別設置在針 14 (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公釐） 五、發明説明（l2 ) 擺動凸輪臂45的前後方向58的兩側，可接合脫離地與各凸 輪41、42的凸輪面滑動接觸並從動。 切換滑動軸82沿上下方向延伸，可自由角位移地設置 在縫初機主體3 1上。操作用曲轴機構g 〇、$ 1、$ 3設置在切 換滑動軸82的下部，與針擺動凸輪臂45的前述一端部的上 部連動，利用切換滑動軸82的角位移，使針擺動凸輪臂45 沿針擺動驅動軸62的軸線位移，使各從動件5〇 ; 51、52可 選擇性地與一對凸輪41、42的各凸輪面滑動接觸。 在操作用曲軸機構中，在針擺動凸輪臂45的前述一端 部的上部形成向上方開放且沿左右方向57延伸的導向槽 80 °操作用曲柄部83在切換滑動軸82的下部偏離切換滑動 軸82的軸線並向下方突出。移動片81具有操作用曲軸部83 可相互角位移地嵌入的操作孔89，通過嵌入導向槽8〇内可 沿左右方向57移動。 在上述實施形式中，雖以固定側凸輪為凸緣凸輪42且 可更換凸輪為槽凸輪41，但是，本發明不限於此，如第5 圖所示般，配置在縫紉機本體3丨之壁部95外側的可更換凸 輪也可以是凸緣凸輪42a。採用這樣的結構，可以使縫紉機 整體結構進一步小型化。 發明的效果 採用上述本發明，由於作為針擺動機構的凸輪採用凸 緣凸輪’所以與現有技術相比凸輪的直徑可以較小，縫紉 機可以結構小型化，縫紉機重量可以更輕。 1231329 A7 B7 五、發明説明（l3 ) 1…主體 2…桿 3…擺動臂 4…擺動軸 5…軸承體 6…驅動連桿 7…擺動桿 8…支撐連桿 9…凸輪驅動軸 10···凸輪槽 11…擺動凸輪 12…侧蓋 13…齒輪 14…傳動齒輪 15…渦輪 16···凸輪臂 17…從動件 18…驅動軸 19…驅動臂 20…凸輪裝置 21···第一凸輪 22···第二凸輪 23···第一凸輪從動件 元件標號對照 24···第二凸輪從動件 25…凸輪體 26、27···凸輪槽 28···下螺栓 2 9…基端部 30…基端部 30···縫紉機 31…主體 3 2…上轴 33、38···曲柄機構 35…針 36…針桿架 3 8…曲柄桿 41、42···凸輪 43…擺動裝置 45…凸輪臂 46…驅動桿 47…針桿幸厄 4 8…針桿架轴 50、51、52···從動件 55…銷 56…上下方向 57…左右方向 (請先閱讀背面之注意事項再填寫本頁) 訂· 16 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公釐） 1231329 A7 B7 五、發明説明（l4 ) 58··· 前後方向 8 3…曲轴部 61··· 連接件 85…操作桿 62"· 驅動軸 86···内表面 65"· 連接軸 8 7…外表面 66… 連接軸 89…操作孔 75”· 凸輪軸 90…固定蝸輪 76··· 凸輪槽 91…上軸齒輪 77… 凸緣 92…支承構件 78··· 圓板 95…壁部 80··· 導向部 9 6…概套 81". 82··· 牙 滑動軸 100…螺栓 ...................f (請先閱讀背面之注意事項再填寫本頁) •訂· 本紙張尺度適用中國國家標準（CNS) A4規格（210X297公釐） 17L .--- (Please read the notes on the back before filling in this page)-Order · 1231329 A7 V. Description of the invention (η) The lever 34 can reciprocate in the left-right direction 57. The needle bar holder shaft 48 is disposed below the upper shaft 32, and one end portion is fixed to the needle bar 34 and extends in the left-right direction 57. One end of the needle bar yoke 47 is supported on the sewing machine main body 31 in an angularly displaceable manner, and the other end thereof is connected to the needle bar frame shaft 48 in an angularly displaceable manner by a pin 55. The camshaft 75 has an axis extending in the front-rear direction 58 and is connected to the upper shaft 32 through gear sets 90, 91. One end of the needle swing driving lever 46 is angularly displaceably connected to the needle bar yoke 47 by the first connecting shaft 66 between the aforementioned one end portion of the needle lever vehicle 47 and the other end portion. The long hole 54 penetrates the cam shaft 75 and is formed in an elongated shape in the up-down direction 56. One end of the needle swing driving shaft 53 is angularly displaceably connected to the other end of the needle swing driving lever 46 by the second connecting shaft 65. The needle swing driving shaft 62 is provided on the sewing machine main body 31 and has an axis extending in the front-rear direction 58 and supports the other end of the needle swing driving shaft 53 in an angular displacement. One end of the needle swing cam arm 45 is movable along the axis of the needle swing drive shaft 62, and is supported by angular displacement relative to the axis of the needle swing drive shaft 62 to prevent relative rotation around the axis of the needle swing drive shaft 62. Angular displacement of the needle swing driving shaft 53. Among the pair of cams 41 and 42, at least one cam is a flange cam. The cams 41 and 42 are penetrated by the cam shaft 75 and are fixed to the cam shaft 75. Each of the cams 41 and 42 has an annular cam surface surrounding the cam shaft 75 on the opposite side of the pair of cams 41 and 42 respectively. At least one cam 41 can be detached, attached, and replaced with respect to the cam shaft 75. Between the cams 41 and 42, the other end portion of the needle swing cam arm 45 is disposed. A pair of followers 50; 51, 52 are set on the needle 14 (please read the precautions on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) 5. Description of the invention ( l2) Both sides of the front-rear direction 58 of the swing cam arm 45 can be engaged with and disengaged from the cam surfaces of the cams 41 and 42 in sliding contact and follow. The switching slide shaft 82 extends in the up-down direction and is provided on the sewing machine main body 31 at a free angular displacement. The operating crank mechanism g0, $ 1, and $ 3 are provided at the lower portion of the switching slide shaft 82 and interlocked with the upper portion of the aforementioned one end portion of the needle swing cam arm 45. The needle swings the cam arm 45 by the angular displacement of the switching slide shaft 82 51, 52 can be selectively brought into sliding contact with each cam surface of a pair of cams 41, 42 by displacement along the axis of the needle swing driving shaft 62. In the crank mechanism for operation, a guide groove which is opened upward and extends in the left-right direction 57 is formed in the upper portion of the one end portion of the needle swing cam arm 45. The crank portion 83 for operation deviates from the switch slide shaft at the lower portion of the switch slide shaft 82. The axis of 82 projects downward. The moving piece 81 has an operation hole 89 which is fitted into the crankshaft portion 83 for angular displacement with respect to each other, and is movable in the left-right direction 57 by being fitted into the guide groove 80. In the above embodiment, the fixed side cam is the flange cam 42 and the replaceable cam is the slot cam 41. However, the present invention is not limited to this. As shown in FIG. 5, it is disposed on the wall portion of the sewing machine body 3 丨. The replaceable cam on the outside of 95 may be a flange cam 42a. With such a structure, the overall structure of the sewing machine can be further miniaturized. Advantageous Effects of Invention According to the present invention described above, since the cam used as the needle swing mechanism uses a flanged cam ', the diameter of the cam can be smaller compared with the prior art, the structure of the sewing machine can be miniaturized, and the weight of the sewing machine can be lighter. 1231329 A7 B7 V. Description of the invention (l3) 1 ... body 2 ... rod 3 ... swing arm 4 ... swing shaft 5 ... bearing body 6 ... drive link 7 ... swing lever 8 ... support link 9 ... cam drive shaft 10 ... · Cam groove 11 ... Swing cam 12 ... Side cover 13 ... Gear 14 ... Drive gear 15 ... Turbine 16 ... Cam arm 17 ... Driver 18 ... Drive shaft 19 ... Drive arm 20 ... Cam device 21 ... First Cam 22 ············································································································· 9 ... base end 30 ... base end 30 ... sewing machine 31 ... main body 3 2 ... upper shaft 33, 38 ... crank mechanism 35 ... needle 36 ... needle bar holder 3 8 ... crank lever 41, 42 ... Cam 43 ... Swing device 45 ... Cam arm 46 ... Drive rod 47 ... Needle bar fortune 4 8 ... Needle bar shaft 50, 51, 52 ... Follower 55 ... Pin 56 ... Up and down 57 ... Left and right direction (please Read the notes on the back before filling in this page) Order · 16 The paper size applies to the Chinese National Standard (CNS) A4 (210X297 mm) 1231329 A7 B7 V. Invention (L4) 58 ··· Fore-and-aft direction 8 3 ... Crankshaft 61 ··· Connector 85 ... Operating lever 62 " · Drive shaft 86 ·· Inner surface 65 " · Connecting shaft 8 7 ... Outer surface 66 ... Connecting shaft 89 ... operating hole 75 "· camshaft 90 ... fixed worm gear 76 ... cam groove 91 ... shaft gear 77 ... flange 92 ... support member 78 ... circle plate 95 ... wall portion 80 ... guide portion 9 6 ... Approximately 81 ". 82 ··· tooth sliding shaft 100… bolt ............ f (Please read the precautions on the back before filling in this page) • Order · This paper size applies to China National Standard (CNS) A4 (210X297 mm) 17