M365364 五、新型說明： 【新型所屬之技術領域】 本創作係有關於一種缝紉機的自動切線裝置，尤指一種用 於水平旋梭鎖式線跡縫紉機的自動切線裝置。 【先前技術】 習知的鎖式線跡縫紉機如中國已公開的創作專利「鎖式線 跡縫紉機」，其申請號為200710104458.1，該縫紉機具有一收 φ 線刀片驅動器驅動一位置保證裝置從卡緊位置到釋放位置，在 釋放位置收線刀片可以旋轉，使收線刀片從初始位置移至挑線 位置。而位置保證裝置内設有偏轉機構，偏轉機構具有樞擺 桿’樞擺桿鉸接一閉鎖桿，閉鎖桿與收線刀片驅動器的提升柱 塞滑動連接，閉鎖桿和樞擺桿在位置保證裝置的卡緊位置受偏 壓彈簧偏壓。當收線刀片要旋轉至挑線位置時，致動收線刀片 驅動器使提升柱塞移出推動閉鎖桿和樞擺桿偏轉至釋放位 • 置。由於收線刀片驅動器要驅動樞擺桿和閉鎖桿組成的偏轉機 構偏轉，且要推動釋放偏塵彈簧的彈力，而需要較大的推力。 所以此切線裝置較為複雜不穩定，且收線刀片驅動器需要較大 的推力，因而體積相對較大，使得整體體積無法縮小，而收線 刀片驅動器出力時會產生撞擊聲音，亦為其缺失。 另外，藉由偏轉機構等的連桿機構來帶動收線刀片樞轉， 由於其作動的電磁鐵需克服偏壓彈簧的阻力，無法確保收線刀 片從初始位置旋轉至極限位置後才返目，如此無法使梭線和針 3 M365364 線順利進入收線刀片的挑線槽中，進而於收線刀片返回初始位 置時切斷，因而切線效率不佳。所以，本創作即針對上述問題 加以解決。 【新型内容】 本創作之主要目的，係在提供一種縫紉機的自動切線裝 置，其娜驅動H直接裝在活動雜軸的鮮上，利用驅動 器的_直接與-凸輪組接觸，並藉由凸輪組的曲面變化來 • 推動芯軸，同時驅動擺臂、樞轴及活動刀旋轉，可省卻先前 技術的偏轉連桿機構與偏壓彈簧，使整體裝置更為簡單，結 構緊湊，可增強切線穩定性。 本創作之另-目的，係在提供_種縫城的自動切線裝 置，其凸輪_復位凸輪在切線週_束時可將驅動器的芯 轴推回原位，可省卻習知技術將驅動器復歸的偏壓彈酱，因 此驅動器怒軸伸出時不會遇到任何阻力，而可使用推力較 • +，體積也較小的驅動器來傳冑，使整體體積縮小，並可避 免驅動器產生明顯的撞擊聲音。 本創作之再-目的，係在提供—種縫喊的自動切線裝 置，藉由凸輪_限位凸輪在爾職的蝴聞驅動器怒 軸前端的位置來帶動活動刀由初始位置旋轉至勾線位置，可 確保活動刀轉動到極限位置才返回，以確保勾線動作，提升 切線效率。 為達上述目的’本創作縫_的自動切線裝置所採用的 4 M365364 技術手段係包含： 一旋梭座，其上固定一固定刀。 一傳動軸’安裝於該旋梭座中。 一凸輪組，裝設於該傳動軸上，並與該傳動軸同步轉動， 該凸輪組包括一轴向凸輪、一限位凸輪與一復位凸輪，該輛 向凸輪與該限位凸輪相鄰的面分別形成偏轉曲面，且二偏轉 曲面之間形成一導引槽，該軸向凸輪並具有一鄰接於該偏轉 • 曲面的回轉曲面，該復位凸輪於徑向方向形成一復位曲面。 一活動刀，經由一樞轴樞設於該旋梭座上，該樞軸下方 具有一擺臂，該擺臂上安裝有一驅動器，該驅動器具有一可 向凸輪組徑向活動伸縮的芯轴。 當活動刀需要轉動至能捕捉缝線的勾線位置時，驅動器 知·到信號，以電磁驅動方式使芯軸向該凸輪組方向伸出，隨 著該傳動軸轉動，芯軸前端沿著該導引槽前進，該導引槽使 _ 芯軸於傳動轴的轴向移動偏擺，並帶動擺臂及樞軸轉動，而 驅動活動刀由與固定刀相接的初始位置旋轉至勾線位置。接 著，藉由該軸向凸輪的回轉曲面將該芯軸前端推回初始位 置，並帶動擺臂及樞軸反向轉動使活動刀反向旋轉歸位，與 該固疋刀相接完成切線動作。同時，該芯軸端面受復位凸輪 的復位曲面推回縮回位置，而完成切線週期。 本創作之其他特點及具體實施例可於以下配合附圖之詳 細說明中，進一步瞭解。 5 M365364 【實施方式】 請參閱第1圖，係本創作位於缝紉機上的位置示意圖； 第2圖，係由第1圖al方向看去的俯視圖；第3圖，係本創 作的立體圖。本創作縫紉機的自動切線裝置係包含一旋梭座 1 %梭座1疋狄置在基板6上，旋梭座1上裝設一傳動轴2， 傳動軸2經由一帶傳動裝置（圖未顯示）連接到位於縫紉機 臂部7内的上軸70。傳動軸2並經由位於旋梭座丨中的一組 • 齒輪傳動裝置（圖未顯示）驅動安裝於旋梭座1上的旋梭u 旋轉。旋梭11的一侧設有一固定刀12，且固定刀12固定於 旋梭座1上。 該切線裝置包含有一活動刀3,活動刀3可旋轉地設置於 旋梭π的另一侧，活動刀3是固定於一樞設在旋梭座ι中的 樞轴31上，活動刀3可隨著柩轴31的轉動而由與固定刀u 相接的初始位置（如第2圖）旋轉至勾線位置，並反向旋轉 • 歸位，與固定刀12相接完成切線動作。 請配合參閱第4-6圖’該傳動軸2上設置有同步轉動的〜 凸輪組4，凸輪組4包含一軸向凸輪41、一限位凸輪幻與〜 復位凸輪43。該軸向凸輪41與限位凸輪幻相鄰的面分別具 有一偏轉曲面410、420，且二偏轉曲面410、42〇之間形成二 轉狀的導引槽44。該限位凸輪42呈扇形。該軸向凸輪& 並具有一鄰接於偏轉曲面410的回轉曲面411。復位凸輪幻 位於回轉曲面411的侧邊，並於徑向形成一復位曲面43〇，、 6 M365364 及與復位曲面430相連接的讓位曲面431，讓位曲面431並相 鄰於該導引槽44，如第7、8圖。 上述安裝活動刀3的樞轴31下方具有一擺臂32，擺臂 32上安裝有一驅動器5。驅動器5具有一可於凸輪組4徑向 活動伸縮的芯軸50，驅動器5為一電磁鐵，而芯軸50前端裝 設一滾輪51 ’當電磁鐵通電致動後，芯軸5〇即向凸輪組4 方向伸出。 • 請參閱第7_9圖’第7圖為切線裝置在初始狀態，也是平時 的縫製狀態，凸輪組4隨著傳動轴2連續旋轉，滾輪51與凸輪 組4不接觸，活動刀3位於與固定刀相接的初始位置。當缝製 結東需要切線時’活動刀3需要轉動至能捕捉縫線的勾線位 置，此時驅動器5得到縫紉機控制器配合傳動轴2旋轉到適當 角度位置時發出的信號，將芯轴50向凸輪組4方向伸出，如第 8圖所不，隨著傳動軸2沿箭頭方向轉動，芯軸5〇前端的滾輪 鲁 51/0著復位凸輪43的讓位曲面431前進到導引槽44,導引槽 隨著傳動轴2轉動而對滾輪51形成一沿傳動軸的轴向推力，推 動擺臂32與樞姉繞軸線γ轉動，_帶動活動刀3繞轴線γ 旋轉，由翻定刀相接的初雜置沿箭頭方向旋轉至勾線位 置’完成準備勾線動作，如第9圖。接著，隨著傳動軸2繼續 轉動，該滾輪51離開限位凸輪42，藉由軸向凸輪顺回轉曲 面411產生-反向的軸向推力，將芯轴5〇推回初始位置，同時 擺臂32與拖細繞軸線γ反向旋轉，並帶動活動刀谈向旋轉 M365364 勾線並歸位，與_完成赠動作。同時，該_M365364 V. New description: [New technical field] This creation is about an automatic thread cutting device for sewing machines, especially an automatic thread cutting device for horizontal rotary hook stitch sewing machines. [Prior Art] A conventional lock stitch sewing machine such as the one disclosed in the Chinese patent "Lock-type stitch sewing machine", whose application number is 200710104458.1, the sewing machine has a φ line blade driver driving a position ensuring device from the chucking Positioned to the release position, the take-up blade can be rotated in the release position to move the take-up blade from the initial position to the take-up position. The position assurance device is provided with a deflection mechanism, and the deflection mechanism has a pivoting lever' pivoting lever hinged to a locking lever, the locking lever is slidably connected with the lifting plunger of the take-up blade driver, and the locking lever and the pivoting lever are in position fixing device The clamping position is biased by a biasing spring. When the take-up blade is to be rotated to the take-up position, actuating the take-up blade drive moves the lift plunger out of the push-lock lever and the pivot lever to the release position. Since the take-up blade driver drives the deflection mechanism consisting of the pivot lever and the lock lever, and pushes to release the elastic force of the dust spring, a large thrust is required. Therefore, the tangential device is relatively complicated and unstable, and the take-up blade driver requires a large thrust, so that the volume is relatively large, so that the overall volume cannot be reduced, and the impact sound is generated when the take-up blade driver outputs the power, which is also missing. In addition, the wire-receiving blade is pivoted by the linkage mechanism of the deflection mechanism or the like, and the electromagnet that is actuated must overcome the resistance of the biasing spring, and cannot ensure that the wire-receiving blade rotates from the initial position to the extreme position. In this way, the shuttle wire and the needle 3 M365364 wire cannot be smoothly inserted into the take-up groove of the take-up blade, and the wire is cut off when the take-up blade returns to the initial position, so that the tangential efficiency is not good. Therefore, this creation addresses the above issues. [New content] The main purpose of this creation is to provide an automatic thread cutting device for a sewing machine. The Na drive H is directly mounted on the moving miscellaneous shaft, and is directly contacted with the cam group by the driver, and by the cam group. The surface changes to drive the mandrel while driving the swing arm, pivot and movable knife rotation, eliminating the prior art deflection link mechanism and biasing spring, making the overall device simpler and more compact, enhancing tangential stability . The other purpose of this creation is to provide an automatic thread cutting device for the sewing machine. The cam_reset cam can push the mandrel of the driver back to the original position during the tangential circumference, which can eliminate the conventional technology to return the drive. The biasing sauce is so that the driver's anger axis does not encounter any resistance when it protrudes, but the driver with a smaller thrust than +, which is smaller in volume, can be used to reduce the overall volume and avoid the obvious impact of the driver. sound. The re-purpose of this creation is to provide a kind of automatic tangential device for sewing, and the position of the front end of the anger axis of the arc drive driver is driven by the cam _ limit cam to rotate the movable knife from the initial position to the hook line position. It can ensure that the movable knife rotates to the limit position before returning to ensure the hook line action and improve the tangent efficiency. The 4 M365364 technology used in the automatic thread trimming device for the above purpose is: a rotary hook seat on which a fixed knife is fixed. A drive shaft ' is mounted in the hook base. a cam assembly is mounted on the transmission shaft and rotates synchronously with the transmission shaft, the cam assembly includes an axial cam, a limit cam and a reset cam, the cam is adjacent to the limit cam The faces respectively form a deflecting curved surface, and a guiding groove is formed between the two deflecting curved surfaces, and the axial cam has a rotating curved surface adjacent to the deflecting surface, and the reset cam forms a reset curved surface in a radial direction. A movable knife is pivotally mounted on the hook base via a pivot having a swing arm below the pivot, and a drive is mounted on the swing arm, the drive having a mandrel that is radially movable and retractable toward the cam set. When the movable knife needs to be rotated to the position of the hook line capable of capturing the suture, the driver knows the signal and electromagnetically drives the core to protrude in the direction of the cam group. As the drive shaft rotates, the front end of the mandrel follows The guiding groove advances, the guiding groove moves the _ mandrel in the axial direction of the transmission shaft, and drives the swing arm and the pivoting, and the driving movable knife is rotated from the initial position connected to the fixed knife to the hook line position . Then, the front end of the mandrel is pushed back to the initial position by the curved surface of the axial cam, and the swing arm and the pivot are reversely rotated to reversely rotate the movable knife to return to the position, and the tangential action is completed by the solid boring tool. . At the same time, the end face of the mandrel is pushed back to the retracted position by the reset surface of the reset cam, and the tangential cycle is completed. Other features and specific embodiments of the present invention can be further understood from the following detailed description in conjunction with the accompanying drawings. 5 M365364 [Embodiment] Please refer to Fig. 1 for the position of the creation on the sewing machine; Fig. 2 is a plan view seen from the direction of the first diagram of the first diagram; and Fig. 3 is a perspective view of the creation. The automatic thread cutting device of the sewing machine comprises a rotary bobbin 1% shuttle seat 1 on the base plate 6, the rotary bobbin 1 is provided with a transmission shaft 2, and the transmission shaft 2 is transmitted via a belt transmission device (not shown) It is connected to the upper shaft 70 located inside the sewing machine arm 7. The drive shaft 2 drives the rotary hook u mounted on the rotary base 1 to rotate via a set of gear transmissions (not shown) located in the rotary hook housing. A fixed blade 12 is provided on one side of the hook 11, and the fixed blade 12 is fixed to the hook base 1. The tangential device comprises a movable knife 3, the movable knife 3 is rotatably disposed on the other side of the hook π, and the movable knife 3 is fixed on a pivot 31 pivoted in the hook base ι, the movable knife 3 can be As the boring shaft 31 rotates, the initial position (as shown in Fig. 2) that is in contact with the fixed knives u is rotated to the hook line position, and is reversely rotated and homing, and the fixed knives 12 are connected to complete the tangential action. Please refer to the figure 4-6'. The transmission shaft 2 is provided with a synchronously rotating ~ cam group 4, and the cam group 4 includes an axial cam 41, a limit cam phantom and a reset cam 43. The faces of the axial cam 41 adjacent to the limit cams respectively have a deflecting curved surface 410, 420, and a two-turning guiding groove 44 is formed between the two deflecting curved surfaces 410, 42A. The limit cam 42 has a fan shape. The axial cam & and has a curved surface 411 adjacent to the deflecting curved surface 410. The reset cam is slid on the side of the curved surface 411, and forms a reset surface 43〇, 6 M365364 and a yielding curved surface 431 connected to the reset curved surface 430, and the positioning curved surface 431 is adjacent to the guiding groove. 44, as shown in Figures 7 and 8. A pivot arm 32 is disposed below the pivot 31 of the movable knife 3, and a driver 5 is mounted on the swing arm 32. The driver 5 has a mandrel 50 that is radially movable and retractable in the cam group 4. The driver 5 is an electromagnet, and the front end of the mandrel 50 is provided with a roller 51'. When the electromagnet is energized and actuated, the mandrel 5 The cam group 4 extends in the direction. • Refer to Figure 7_9'. Figure 7 shows the tangential device in the initial state. It is also the usual sewing state. The cam group 4 rotates continuously with the drive shaft 2, the roller 51 does not contact the cam group 4, and the movable knife 3 is located at the fixed knife. The initial position of the connection. When the sewing knot needs to be cut, the movable knife 3 needs to be rotated to the position of the hook line capable of catching the stitching. At this time, the driver 5 obtains a signal issued by the sewing machine controller when the driving shaft 2 is rotated to an appropriate angular position, and the mandrel 50 is obtained. Extending in the direction of the cam group 4, as shown in Fig. 8, as the drive shaft 2 rotates in the direction of the arrow, the roller ruth 51/0 at the front end of the mandrel 5 着 advances the retaining surface 431 of the reset cam 43 to the guide groove 44. The guiding groove forms an axial thrust along the driving shaft with the driving shaft 2, and pushes the swing arm 32 and the pivoting axis γ to rotate, and drives the movable knife 3 to rotate around the axis γ. The initial mismatch of the fixed knife is rotated in the direction of the arrow to the hook line position to complete the preparatory hook line action, as shown in Figure 9. Then, as the drive shaft 2 continues to rotate, the roller 51 moves away from the limit cam 42 and generates a reverse axial thrust by the axial cam along the rotary curved surface 411 to push the mandrel 5 回 back to the initial position while swinging the arm 32 reverse rotation around the axis γ, and drive the movable knife to talk to the rotation M365364 hook line and return to the position, and _ complete the gift. At the same time, the _
位凸輪43的復位曲面43。推動而漸縮回復位，如第7圖所广 本創作將驅動器5直接安裝在擺臂32上，藉 I 芯__触4觸’ ___化來推動^ 臂32旋轉，進而驅動活動刀3旋轉，其結構簡單緊湊，The reset curved surface 43 of the position cam 43. Pushing and gradually returning the position, as shown in Fig. 7, the driver 5 is directly mounted on the swing arm 32, and the I-core __ touch 4 touches '___ to push the arm 32 to rotate, thereby driving the movable knife 3 Rotating, its structure is simple and compact,
切線穩定性。且驅動器5的芯⑽伸出時不會遇到任何阻力向 _鬆地到達指定位置，驅動器5不需要太大的推力，因此， 可採用較小的電韻來實施，而能縮小整體_積。’ 請參閱第1(M2圖，第10圖為本創作由第方向看去的 平面示意圖，第11圖為本創作第1G_⑽，剖面示_，第 12圖為本創作第1〇圖的£2_£2’剖面示意圖。本創作可於旋梭座1 中裝設一穩定活動刀3的裝置，該樞軸31上設有一開口槽 310，旋梭座1於樞軸31的徑向方向上設有一開孔，開孔中螺 合一定位螺絲13，定位螺絲13内設有一彈簧14，彈簧14前端 設有一鋼珠15，鋼珠15並抵靠於開口槽31〇，藉由定位螺絲13 加壓一定的力到樞轴31的開口槽310，可以穩定活動刀3的初 始位置。 請參閱第13圖’為第10圖的β-β’剖面示意圖，本創作亦 可於擺臂32中裝設一穩定驅動器芯軸50的裝置。該驅動器5芯 軸50設有一環狀弧形槽501，該擺臂32於驅動器芯轴50的徑向 方向設有一開孔，開孔内裝設一抵靠於弧形槽501的鋼珠320 與一彈簧321，彈簧321外侧並以一定位螺絲322鎖入開孔内固 8 M365364 定。藉由定位螺絲322加壓一定的力到芯轴50上的弧形槽 501，可以穩定驅動器芯軸50的初始位置。 以上所述者，僅為本創作之較佳實施例，當不能用以限 定本創作可實施之範圍，凡習於本業之人士所明顯可作變化 與修飾，皆應視為不悖離本創作之實質内容。 【圖式簡單說明】 第1圖係為本創作位於缝紉機上的位置示意圖。 • 第2圖係為本創作由第1圖al方向看去的俯視圖。 第3圖係為本創作之立體圖。 第4圖係為本創作由第1圖a2方向看去的平面示意圖。 第5圖係為本創作凸輪組的平面示意圖（一）。 第6圖係為本創作凸輪組的平面示意圖（二）。 第7圖係為本創作位於初始狀態的切線動作示意圖（一） 第8圖係為本創作的切線動作示意圖（二）。 • 第9圖係為本創作的切線動作示意圖（三）。 第10圖係為本創作由第1Sja3方向看去的示意圖。 第11圖係為本創作第10圖的fl-fl，剖面示意圖。 第12圖係為本創作第10圖的£2-£2,剖面示意圖。 第圖係為本創作第ίο圖的β-β’剖面示意圖。 【主要元件符號說明】 卜旋梭座 2、傳動軸 3、活動刀 4、凸輪組 9 M365364 5、驅動器 6、基板 7、臂部 11、旋梭 12、固定刀 13、定位螺絲 14、彈簧 15、鋼珠 31、樞轴 32、擺臂 41、軸向凸輪 42、限位凸輪 43、復位凸輪 44、導引槽 50、芯轴 51、滾輪 70、上轴 310、開口槽 320、鋼珠 321、彈簧 322、定位螺絲 410、偏轉曲面 411、回轉曲面 420、偏轉曲面 430、復位曲面 431、讓位曲面 501、弧形槽Tangent stability. Moreover, the core (10) of the driver 5 does not encounter any resistance to the specified position when it is extended, and the driver 5 does not need too much thrust. Therefore, a small galvanic can be used to implement, and the overall _ product can be reduced. . ' Please refer to the first 1 (M2 picture, the 10th picture is a schematic plan view of the creation from the first direction, the 11th picture is the 1G_(10) of the creation, the section shows _, and the 12th picture is the £2_ of the first picture of the creation A schematic diagram of the profile of the £2'. The present invention can be provided with a device for stabilizing the movable knife 3 in the rotary bobbin 1, the pivot 31 is provided with an open slot 310, and the rotary hook seat 1 is arranged in the radial direction of the pivot 31 There is an opening, a positioning screw 13 is screwed in the opening, a spring 14 is arranged in the positioning screw 13, and a steel ball 15 is arranged at the front end of the spring 14, and the steel ball 15 abuts against the opening groove 31〇, and is pressed by the positioning screw 13 The force to the opening groove 310 of the pivot 31 can stabilize the initial position of the movable blade 3. Please refer to Fig. 13 ' is a schematic view of the β-β' of the 10th figure, and the creation can also be installed in the swing arm 32. A device for stabilizing the drive mandrel 50. The drive 5 mandrel 50 is provided with an annular arcuate groove 501, and the swing arm 32 is provided with an opening in a radial direction of the drive mandrel 50, and an opening is provided in the opening The steel ball 320 of the curved groove 501 and a spring 321 , the outer side of the spring 321 and locked into the opening with a positioning screw 322 8 M365364 The initial position of the driver spindle 50 can be stabilized by the positioning screw 322 pressing a certain force into the arcuate groove 501 on the mandrel 50. The above is only a preferred embodiment of the present invention, when it cannot be used In order to limit the scope of the creation of this creation, those who are familiar with the industry can obviously make changes and modifications, which should be regarded as not deviating from the essence of the creation. [Simplified illustration] Figure 1 is based on the creation Schematic diagram of the position on the sewing machine. • Fig. 2 is a top view of the creation from the direction of the first picture al. The third picture is a perspective view of the creation. The fourth picture is the view of the creation from the direction of the first picture a2 Fig. 5 is a plan view (1) of the creation cam group. Fig. 6 is a plan view of the creation cam group (2). Fig. 7 is a schematic diagram of the tangential action of the creation in the initial state. (1) Figure 8 is a schematic diagram of the tangent action of the creation (2). • Figure 9 is a schematic diagram of the tangent action of the creation (3). Figure 10 is a schematic diagram of the creation from the direction of the 1st Sja3. Figure 11 is the original Fig. 10 is a cross-sectional view of the fl-fl of Fig. 10. Fig. 12 is a schematic cross-sectional view of Fig. 10 of Fig. 10 for the creation of Fig. 10. The figure is a schematic view of the β-β' section of Fig. Component symbol description] Shuttle holder 2, drive shaft 3, movable knife 4, cam group 9 M365364 5, driver 6, base plate 7, arm portion 11, hook 12, fixed knife 13, set screw 14, spring 15, steel ball 31, pivot 32, swing arm 41, axial cam 42, limit cam 43, reset cam 44, guide groove 50, mandrel 51, roller 70, upper shaft 310, open slot 320, steel ball 321 , spring 322, Positioning screw 410, deflecting curved surface 411, curved curved surface 420, deflecting curved surface 430, resetting curved surface 431, yielding curved surface 501, curved groove