200932982 九、發明說明： 【發明所Λ之技術領域】 本發明涉及一種鏈縫縫紉機，允甘θ 4fc ^ > > 尤其疋扣一種通過改變 鏈縫縫紉機的彎針尚度而防止針線之間的交織，確不形 成線跡的鍵縫縫纺機的線跡跳針袭置。 【先前技術】200932982 IX. Description of the Invention: [Technical Field] The present invention relates to a chain sewing machine, which is capable of preventing a needle thread between the needle thread by changing the bending needle of the chain stitch sewing machine. The interweaving of the stitches of the key-stitching machine that does not form a stitch is indeed placed. [Prior Art]
圖1(A)所示，鏈缝縫紉機通常適用於牛仔褲〇㈣s) 的褲腰（waist belt)缝接作業，褲腰（们是一種縫接在牛 仔褲（J)上端褲身周圍的帶狀布料。圖1(幻所示，使用至 少兩個以上的縫㈣在其上部與下部分別進行平行缝製工 序。 爲了南效率地縫製牛仔褲，通常會采取下列工序。 如圖1(B)所不，把褲身布料11的端部插入截面略呈υ型的 細長褲腰布料1Q的開口部内，在設定長度α)内缝接各褲 身布料11與褲_布額其後的設定長度⑻則形成沒有 内的二跡:u十邹位(非縫合部位”然後重新在設定長度 、行’'•接’按照上述間歇縫製方式連續進行縫接作 爲了矛?！用 作一套、上述經過縫接的布料10’ 11準備出可以製 Γ Γ 裤的布料’裁斷上述褲腰布料10的設定位置 C，C ’按照圖2戶斤+ 饮 粗1ΠΑΑ座你典π的刖頭D方向插入裁斷後的上述褲腰布 截面产理 10a ’然後再縫接被插入的該端部後進行 200932982 —者地k升了生産坆率與作業效率。 。褲身布料⑽褲腰布料⑽之間的縫 腰布料10的裁斯载面10a進行截面處再.t針對褲 不形成線跡跳針部位而連續縫接該褲身二和 10的時候相比，由於不需要重新解開褲腰布料i。的：：枓 面10a附近的線跡，因此可以大幅提高 斷戴 作爲工作人員人爲地製作線跡桃針部位的上。 性縫幼手段的—例，下面結合圖3到_侧先’’敗 ΐ專=ΓΓ7'29151號發明’上迷現有鍵縫 括·針棒14，具有安裝並固定在縫句針12 =機包 :上/下移動機構（未圖示），f以使該針棒14上々移=13 弯針（lGQPer)l5沿著缝製物的移送方 =， 把料線α)個別地插入該鏠匆針12的縫匆線()τ^ ❹ .(1—)並貫穿而形成線跡；彎針維持機構2〇，= 幫針15的擺動量；擺動機構（未圖示），利用該彎針維= 構20使該彎針15進行擺動運動；烟㈣針部7()，其= 執跡和該彎針15的刀尖15a軌敍又，其保㈣彎針鎖= 作爲尖銳突塊可以在捕獲彎針線（L)的同時形成線環 (1〇叩）形狀；往復動作機構（未圖示），使該保持器弯針部 70沿著Y軸方向進行往復運動；以及機架讥，可以支 述各構成要素。 此時，該保持器彎針部70具有套蓋75並可以在縫紉 縫製物犄阻止保持器彎針部7〇與彎針丨5的交織而得以防止 線跡（stich)形成，在縫紉作業過程中進入線跡跳針 200932982 (skip)區段時該套蓋75移動到可以遮 * 的位置’使該套蓋75側面部的板狀防交工二J f針銷71 該彎針15與該保持器彎針銷71的交織而得以随止 具有上述結構的現有鏈缝縫 =的形成。 ❹ 在該套蓋75移動時利用導引件促使保置， 性往復運動，如果該套蓋75與保持器彎針邛’二70進行線 較低，移動將不順利而使線跡跳針動作不紅的零件精度 套f 5的動作過程令由於防交織突塊⑽;在該 之間的碰撞與摩擦而發生噪音。 、’、持針銷71 而且，爲了使彎針線（L)貫穿該彎飪 一 線作業時，料15只能沿著布料 進行下部穿 擺動運動，因此穿線作業不·。Μ知有限幅度的 【發明内容】 爲了解决現有技術的上述問題， 供一種使用致動器促使彎針沿著上 毛月的目的是提 在最有利於形成線跡的最佳位置使=仃升降運動， 其與保持器彎針部之間的交織，從而二:及回歸，阻止 縫縫匆機的線跡跳針裝置。 防止線跡的鏈 爲了實現上述目的，本發明在一 縫縫勿機的線跡跳針裝置適用於包=中提供-種鏈 機··一彎針，進行平行於布料移送方向的=的鏈縫縫匆 刀尖從上/下移動的縫初針捕獲縫匆此動運動並利用 f入膏針線並使其貫穿；一保持ii.f針’然後 銷可Μ在該彎針的刀尖捕獲到彎針線時同針 200932982 n針維持機構’可以調節該彎針的支援及擺動量，其 動，爲包括下列單元：_上支.撑塊’可以固定該彎針；致 撑爲了，該上支撑塊移位元而提供驅動力；以及下支 r、，丄一側安裝該致動器，另一側連接到爲了使該彎針進 。”行於布料移送方向的擺動運動而提供驅動力的擺動轴 Ο 儿朴在較佳實例中，該上支樓架塊憑藉該致動器的驅動力 〜考上下方向移位。 較佳地，兮|_ ^ 、、， Μ上支撑塊憑藉該致動器的旋轉驅動力而在 达方向移動。較佳地’該致動器應該使用氣壓缸。 括Τ佳地該上支撑塊與下支撑塊之間的隔離空間還包 棒。乂在該上支撐塊沿著上下方向移動時加以導引的導引 ❹ 本發月的另一較佳實施例中還一 導弓I棒的外周部上，可以气㈣女裝在该 的隔離切塊及訂支撑塊之間 出現的^擊 疋的彈性力吸收該上支撑塊朝下移動而 較佳地，更具有一拘束棒内置於—工作缸 imr上支撐塊’其外柱*則形成螺絲部並通= 累^合在位於該上支撑塊上側部的拘束螺母。 、較佳地，還包括一拘束螺栓，其—側貫通哕上 並固定在該下支撑塊的固定部，— 上部突出廿 側則在該上支撑塊的 丨=出並可以防止該上支撑塊脫離。 支撐塊固呈圓柱形狀並貫穿該上 ，、知插入該固定部的固定槽並被該固 200932982 定螺絲固定；以及一拘束部，呈一定厚度的圓板形，其尺 寸大於該固定棒的戴面積，可以防止該上支撑塊朝上脫 〇 卜 . 較佳地，還包括一彈簧，安裝在該固定棒的外周部上 ’可以在該拘束部及該上支撑塊之間的隔離空間利用—~ 的彈性力協助該上支撑塊朝下移動。 定As shown in Fig. 1(A), the chain stitch sewing machine is generally suitable for the waist belt stitching work of the jeans (four) s), and the waistband (which is a band fabric which is sewn around the upper end of the jeans (J). 1 (Imaginary, use at least two or more slits (4) to perform the parallel sewing process in the upper part and the lower part respectively. In order to efficiently sew jeans in the south, the following steps are usually taken. As shown in Fig. 1(B), The end portion of the trousers fabric 11 is inserted into the opening portion of the slender waistband fabric 1Q having a slightly-shaped cross section, and the set length (8) of each of the pants body fabric 11 and the pants fabric is sewn within the set length α). The two traces: u ten Zou position (non-stitched part) and then re-sewed in the set length, line ''• connection' according to the above intermittent sewing method as a spear?! Used as a set, the above-mentioned stitched cloth 10' 11 Prepare a fabric that can be used to make Γ 裤 'Cut the position of the waistband fabric 10 C, C ' according to Figure 2 斤 饮 饮 饮 饮 ΠΑΑ ΠΑΑ 你 你 你 典 典 典 典 D D D D D D 插入 插入 插入 插入 插入Section production 10a 'and then stitched into the inserted After the end, the 200932982 is used to increase the production rate and work efficiency. The trousers fabric (10) between the waistband fabric (10) and the waist 10 of the waist fabric 10 are cut at the cross section. Compared with the case where the stitches are stitched and the seams are continuously sewn to the pants 2 and 10, since it is not necessary to re-open the waistband fabric i: the stitches near the face 10a, the wearer can be greatly improved as a staff member. Artificially making the stitches on the needles. The example of the sexual sewing method is as follows, in conjunction with Figure 3 to the _ side first''''''''''''''''''' , with mounting and fixing on the sewing needle 12 = machine bag: upper/lower moving mechanism (not shown), f to shift the needle bar 14 = 13 bending needle (lGQPer) l5 along the sewing object transfer side =, insert the material line α) into the seam line () τ^ ❹ (1 -) of the 鏠 针 12 separately and form a stitch; the looper maintaining mechanism 2 〇, = the amount of swing of the trowel 15 a swinging mechanism (not shown) by which the looper 15 is oscillated by the bender; the smoke (four) needle 7 (), which = the trace and the bend The tool tip 15a of the 15 is further described, and its (4) curved needle lock = as a sharp projection, the shape of the wire loop (1〇叩) can be formed while capturing the looper thread (L); the reciprocating mechanism (not shown) enables The retainer looper portion 70 reciprocates in the Y-axis direction; and the frame cymbal, each of which can be attached. At this time, the retainer looper portion 70 has a cover 75 and can be blocked in the sewing sewing material. The interlacing of the retainer loop portion 7〇 with the looper 5 prevents stick formation, and the cover 75 moves to a position when the stitch jumps 200932982 (skip) section is entered during the sewing operation. The position of the plate-shaped anti-interference 2 J f pin 71 of the side portion of the cover 75 is interlaced with the retainer loop pin 71 to form the existing chain seam having the above structure. . ❹ When the cover 75 moves, the guide member is used to promote the retaining and reciprocating motion. If the cover 75 and the retainer bender 邛 '270 are lower, the movement will not be smooth and the stitch jumps. The operation process of the non-red part precision sleeve f 5 causes noise due to the anti-interlacing projection (10); collision and friction between the two. Moreover, in order to allow the hook thread (L) to pass through the bending line, the material 15 can only perform the lower swinging motion along the cloth, so the threading operation is not performed. SUMMARY OF THE INVENTION In order to solve the above problems of the prior art, the purpose of using an actuator to urge the curved needle along the upper hair month is to raise the optimum position at the most favorable stitch formation. Movement, the interweaving between it and the curved portion of the retainer, thus two: and return, to prevent the seam jump device of the seaming machine. In order to achieve the above object, the present invention is suitable for a stitching device for stitching in a sewing machine, which is suitable for use in a package = a chain machine, a bending needle, and a chain parallel to the direction in which the cloth is conveyed. The slit burr tip moves from the upper/lower seam to the nip nip. The seam is snapped and moved and the needle is threaded and penetrated through it; one keeps the ii.f needle' and then the pin can be caught at the tip of the looper When the needle thread is reached, the same needle 200932982 n-needle maintenance mechanism can adjust the support and swing amount of the looper. The movement includes the following units: _ upper support. The support block can fix the curved needle; The support block shifting element provides a driving force; and the lower branch r, the actuator is mounted on one side and the other side is connected in order to advance the looper. Preferably, in the preferred embodiment, the upper branch block is displaced by the driving force of the actuator in the up and down direction. Preferably, the swinging movement in the direction in which the cloth is transferred is provided.兮|_ ^ , , , The upper support block moves in the direction of the direction by the rotational driving force of the actuator. Preferably, the actuator should use a pneumatic cylinder. The upper support block and the lower support are preferably included. The isolation space between the blocks is also wrapped with a rod. The guiding guide guided when the upper supporting block moves in the up and down direction. In another preferred embodiment of the present month, the outer peripheral portion of the guiding rod is also provided. The air force of the (4) women's wear between the isolated dicing block and the support block can absorb the upper support block to move downwards. Preferably, a restraint rod is built in the working cylinder imr The upper support block 'the outer column* forms a screw portion and passes through the restraining nut on the upper side of the upper support block. Preferably, the outer column also includes a restraining bolt, which is connected to the side and fixed to the side. The fixing portion of the lower support block, the upper protruding side and the upper supporting block The 丨=out and can prevent the upper support block from being detached. The support block is fixed in a cylindrical shape and penetrates the upper portion, and the fixing groove inserted into the fixing portion is fixed and fixed by the fixing screw 200932982; a circular plate shape having a size larger than a wearing area of the fixing rod, which can prevent the upper supporting block from being dislocated upward. Preferably, a spring is further mounted on the outer peripheral portion of the fixing rod to be restrained The isolation space between the portion and the upper support block uses the elastic force of -~ to assist the upper support block to move downward.
如前所述，本發明的鏈縫縫紉機的線跡跳針IfU ❹以在縫切時改變彎針高度而使線跡跳針，從而有效地防i 了由於零件之間的衝突與摩擦而發生的嗓音。 本發明具有可以改變彎針高度的結構，從而有致地 防止了由於現有保持器彎針上使用套蓋而在其往左/ 運動時發生的振動。 ^ 工作人員在穿插彎針線時，本發明允許其在該上倒 支援塊維持下降狀態的情形下爲彎針穿線’因此可以輕 地執行彎針線的穿線作業。 二 β 【實施方式】 下面結合附圖對本發明的較佳實施例做進一步說明。 ’圖7是本發明較佳實施例的鏈缝縫紉機的線跡跳針裝置的 分解立體圖，圖8是本發明較佳實施例的鏈縫縫約機的線 跡跳針裝置的使用狀態圖。 如附圖所示’爲了在缝紉時跳過線跡而阻止交織的鏈 縫縫幼機的線跡跳針裝置包括彎針110、上支撑塊120、致 動器130、下支撑塊140、導引棒150及拘束螺栓160。 200932982 _ 該彎針110呈鐮刀形狀，其前方爲尖銳的插入部111， 可以和保持器彎针銷171—起參與交織作業。該保持器彎 針銷171在縫紉機的運動軸173尾端的保持器彎針部170側 面突出。 該上支撑塊120的一側有多個導孔121垂直貫通，另一 側則有拘束孔122垂直貫通。 在本實施例中，該致動器130使用氣壓缸並包括：本 體部131 ;工作缸132，呈圓筒狀，内置於該本體部131 ; ❹ 以及拘束棒133，呈圓柱狀，内置於該工作缸132。該工作 缸132的上側尾端和該上支撑塊12〇的下端部之間形成面接 觸。該拘束棒133貫通該上支撐塊12〇，其一侧部突出於該 上支撑塊120的上侧並和拘束螺母135結合。因此，該拘束 螺母135可以阻止該上支撑塊12〇朝上脫離，該工作缸132 貝|J支援該上支撑塊120的下部。在本發明的另一實施例中 ’遠工作缸132的内面形成螺絲部（未圖示），該拘束棒133 的另-側部形成螺絲部教通過螺絲結合在該工作缸132的 ❹ 螺絲部。 ， 訂支撑塊140的一侧突出了其上部为固定槽144：的固 ' 定部143，另一侧则具有多个安裝槽142。該固定部143的 侧面具有其内柱面形成了螺絲部的固定件145，固定螺絲 146通過螺紋方式結合在讀固定件145上。該下支撑塊14〇 的側面具有貫通的固定孔141並與縫初機的擺動軸147結合 〇 m &丨棒15Q，其下端部插入該下支 撑塊140的安裝槽142 ’上端部則插入該上支撑塊12〇的導 10 200932982 孔121，在該導引棒150的外周部上插入彈簧151並位於該 上支撑塊120及該下支撑塊140之間的隔離空間。 位於該導引棒150外周部上的彈簧151可以在該上支撑 塊12 0及該下支撑塊14 0之間的隔離空間吸收該彎針11 〇升 降時因爲上支撑塊120朝下移動而造成的衝擊。 ❹ ❹ 該拘束螺栓160的一侧是圓柱形狀的固定棒161，另一 側是尺寸大於該固定棒161截面積且具有一定厚度的圓板 狀拘束部162。該固定棒161貫穿該上支撑塊120的拘束孔 122 ’其一端插入該固定部143的固定槽144並由該固定螺 絲146加以固定。該拘束部162位於該上支撑塊12〇的上侧 並且可以阻止該上支撑塊12〇朝上脫離。 如圖9所示’該拘束螺栓的固定棒“I外周部上另 外安裝辅助彈簧163，該輔助彈簧163可以在該拘束部162 及上支撑塊120上面之間利用的彈性力協助該上支撑 塊120朝下移動。 ^ .、八有上述結構的本發明較佳實施例的鏈縫缝矣 機的線跡跳針裝置的動作進行詳 110和保持器彎針銷171 一起夫盘‘从月縫謂以 起> /、父織作業並且在縫製物」 形成線跡’到了不需要線跡的線 120將隨著致動器13〇的 叫時’上支翻As described above, the stitch jump stitch IfU ❹ of the chain stitch sewing machine of the present invention causes the stitches to jump when the stitching height is changed during the slitting, thereby effectively preventing the occurrence of collision and friction between the parts. The voice of the voice. The present invention has a structure that can change the height of the looper, thereby preventing the vibration occurring in the left/movement due to the use of the cover on the existing retainer looper. ^ When the worker inserts the looper thread, the present invention allows the looper to be threaded in the case where the upside down support block is maintained in the lowered state. Therefore, the threading operation of the looper thread can be performed lightly. [II] [Embodiment] Hereinafter, preferred embodiments of the present invention will be further described with reference to the accompanying drawings. Fig. 7 is an exploded perspective view showing a stitch jumper for a chain stitch sewing machine in accordance with a preferred embodiment of the present invention, and Fig. 8 is a view showing a state of use of the stitch jumper for a chain stitching machine according to a preferred embodiment of the present invention. As shown in the drawing, the stitch jump device for preventing the interlaced chain stitching machine from skipping the stitches during sewing includes the looper 110, the upper support block 120, the actuator 130, the lower support block 140, and the guide The rod 150 and the restraint bolt 160. 200932982 _ The curved needle 110 has a sickle shape and has a sharp insertion portion 111 in front thereof, and can participate in the interlacing work together with the retainer hook pin 171. The retainer loop pin 171 protrudes from the side of the retainer loop portion 170 at the end of the movement shaft 173 of the sewing machine. On one side of the upper support block 120, a plurality of guide holes 121 are vertically penetrated, and on the other side, the restraint holes 122 are vertically penetrated. In the present embodiment, the actuator 130 uses a pneumatic cylinder and includes a main body portion 131. The working cylinder 132 has a cylindrical shape and is built in the main body portion 131. The dam and the restraining rod 133 have a cylindrical shape and are built therein. Working cylinder 132. A surface contact is formed between the upper end of the cylinder 132 and the lower end of the upper support block 12A. The restraining rod 133 penetrates the upper support block 12'', and a side portion thereof protrudes from the upper side of the upper support block 120 and is coupled to the restraining nut 135. Therefore, the restraining nut 135 can prevent the upper support block 12 from being detached upward, and the working cylinder 132 supports the lower portion of the upper support block 120. In another embodiment of the present invention, the inner surface of the distal working cylinder 132 is formed with a screw portion (not shown), and the other side portion of the restraining rod 133 is formed with a screw portion that is screwed to the 螺丝 screw portion of the working cylinder 132. . One side of the binding support block 140 protrudes from the fixing portion 143 whose upper portion is the fixing groove 144: and the other side has a plurality of mounting grooves 142. The side surface of the fixing portion 143 has a fixing member 145 whose inner cylindrical surface forms a screw portion, and the fixing screw 146 is screwed to the reading fixing member 145. The side surface of the lower support block 14A has a through fixing hole 141 and is coupled with the swing shaft 147 of the slitting machine 〇m & the rod 15Q, and the lower end portion thereof is inserted into the upper end of the mounting groove 142' of the lower support block 140. The guide 10 200932982 hole 121 of the upper support block 12 插入 inserts a spring 151 on the outer peripheral portion of the guide rod 150 and is located in an isolated space between the upper support block 120 and the lower support block 140. The spring 151 located on the outer peripheral portion of the guiding rod 150 can absorb the curved needle 11 when the upper supporting block 120 and the lower supporting block 140 are separated from each other, because the upper supporting block 120 moves downward. The impact.一侧 一侧 One side of the restraining bolt 160 is a cylindrical fixing rod 161, and the other side is a disc-shaped restraining portion 162 having a size larger than the sectional area of the fixing rod 161 and having a certain thickness. The fixing rod 161 penetrates the restraining hole 122' of the upper supporting block 120, and one end thereof is inserted into the fixing groove 144 of the fixing portion 143 and fixed by the fixing screw 146. The restraining portion 162 is located on the upper side of the upper support block 12A and can prevent the upper support block 12 from being detached upward. An auxiliary spring 163 is additionally attached to the outer peripheral portion of the fixing rod "I of the restraining bolt" as shown in FIG. 9, and the auxiliary spring 163 can assist the upper supporting block by the elastic force between the restraining portion 162 and the upper support block 120. 120 moves downward. ^., the operation of the stitch jump device of the chain slitting machine of the preferred embodiment of the present invention having the above structure is carried out in detail 110 and the retainer loop pin 171 together with the husband's It is said that the line < /, the parent weaving work and the formation of the stitch in the sewing "to the line 120 that does not need the stitch will be turned up with the call of the actuator 13"
動。 f 132朝下移㈣跟著朝下I 疋在該上支撑塊12〇上的弯 響而移動肋料器彎針銷Π H #到上述動作的彳 織作業。隨著該彎針110無法參鱼^從而難以參與: 織作業而中止線跡作業。 /、3保持器彎針銷171的: 11 200932982 另外’進入需要形成線跡的區段時，該致動if 130的 該工作知：132朝上移動，該上支撑塊120也跟著朝上移動， 該彎針11 〇受到上述動作的影響而移動到可以和該保持器 彎針銷171進行交織的高度。因此，該彎針110可以參與交 織而在縫製物上形成線跡。 則文所舉本發明一實施例雖然使用氣壓缸作爲該致動 器130並驅使該上支撑塊12〇沿著上/下方向移動，但本發 日月並不局限於此，在另—實施例中可以使用使用直線電動 〇機（Linear Motor)之類的線性電動機作爲該致動器13〇並 通過旋轉運動驅使該上支撑塊12〇在布料移送方向移動。 本發㈣然只針對具體實施例進行了詳細說明，但是 在本發明的技術思想範脅内，可以出現各種變形及修改， 适在具有-般專業知識的同-行業人士來說是非常明顯的 〇 因此’本發明真正的權利範圍不能局限於上述實施例 括後述的權利要求書’其等值範圍内的技術思想 〇 也應該包含在本發明的權利範圍内。 【國式簡單說明】 圖1是牛仔褲的線跡及線跡跳針部的形成圖. 圖2是褲腰布料的裁斷部的放大略圖^ ^裁斷部的縫幼 狀態圖； 圖3是習用之鏈縫縫紉機的立體圖； 圖4是習用之鏈縫縫妨機的線跡跳針裳置的重要部位立 12 200932982 圖5是習用之鏈縫縫紉機的彎針的運動執跡圖； 圖6是習用之鏈縫縫紉機的彎針周圍圖； 圖7是本發明較佳實施例的鏈缝縫紉機的線跡跳針裝置 的分解立體圖； . 圖8是本發明較佳實施例的鏈缝縫紉機的線跡跳針裝置 的使用狀態圖； 圖9是本發明另一實施例的鏈缝缝紉機的線跡跳針裝置 的使用狀態圖。 【主要元件符號說明】 110 ： 彎針 111 :插入部 120 ： 上支撑塊 121 :導孔 122 ： 拘束孔 130 :致動器 131 ： 未體部 132 :工作缸 133 ： 拘束棒 135 :拘束螺母 140 ： 下支撑塊 141 :固定孔 142 ： 安裝槽 143 :固定部 144 ： 固定槽 145 :固定件 146 : 固定螺絲 147 :擺動軸 150 ： 導引棒 151 :彈簧 160 ： 拘束螺栓 161 :固定棒 162 ： 拘束部 163 :輔助彈簧 170 : 保持器彎針部 171 :保持器 173 ： 運動轴 180 :針棒 181 : 縫紉針支援部 182 :缝紉針 13move. f 132 moves downward (4) following the bending of the upper support block 12〇 and moves the rib nipper pin Π H # to the woven operation of the above action. As the looper 110 is unable to fish, it is difficult to participate: the weaving operation stops the stitching operation. /, 3 retainer loop pin 171: 11 200932982 In addition to 'into the section where the stitch is required to be formed, the action of the actuating if 130: 132 moves upwards, the upper support block 120 also moves upwards The looper 11 is moved to a height that can be interlaced with the retainer loop pin 171 by the action described above. Therefore, the looper 110 can participate in the interlacing to form a stitch on the sewn article. Although an embodiment of the present invention uses a pneumatic cylinder as the actuator 130 and drives the upper support block 12 to move in the up/down direction, the present day and the month are not limited thereto, and another embodiment A linear motor such as a linear electric motor can be used as the actuator 13 and the upper support block 12 is driven to move in the cloth transfer direction by a rotational motion. The present invention has been described in detail with reference to the specific embodiments, but various modifications and modifications can be made within the technical scope of the present invention, and it is obvious that the same industry professionals with general expertise are very obvious. Therefore, the true scope of the present invention is not limited to the above-described embodiments, and the technical ideas within the scope of the equivalents are also included in the scope of the present invention. [A brief description of the national style] Fig. 1 is a diagram showing the formation of the stitches and stitches of the jeans. Fig. 2 is an enlarged schematic view of the cutting portion of the waistband fabric. ^The state of the seam of the cutting portion; Fig. 3 is a chain of the conventional Fig. 4 is an important part of the sewing stitch of the conventional chain sewing machine. 12 200932982 Fig. 5 is a movement diagram of the curved needle of the conventional chain sewing machine; Fig. 6 is a conventional use Figure 7 is an exploded perspective view of a stitch stitching device of a chain stitch sewing machine in accordance with a preferred embodiment of the present invention; Figure 8 is a stitch jump of a chain stitch sewing machine in accordance with a preferred embodiment of the present invention; Fig. 9 is a view showing a state of use of a stitch jumper of a chain stitch sewing machine according to another embodiment of the present invention. [Description of main component symbols] 110 : Curved needle 111 : Insertion portion 120 : Upper support block 121 : Guide hole 122 : Constraint hole 130 : Actuator 131 : No body portion 132 : Working cylinder 133 : Restraint rod 135 : Restraint nut 140 Lower support block 141: fixing hole 142: mounting groove 143: fixing portion 144: fixing groove 145: fixing member 146: fixing screw 147: swinging shaft 150: guiding rod 151: spring 160: restraining bolt 161: fixing rod 162: Restriction unit 163 : Auxiliary spring 170 : Retainer looper portion 171 : Retainer 173 : Movement shaft 180 : Needle bar 181 : Sewing needle support portion 182 : Sewing needle 13