JPS6127577Y2 - - Google Patents

Description

【考案の詳細な説明】 この考案はミシンアーム内にミシン上軸に連動
する複数の模様カムを設けるとともにこの模様カ
ムと平行する軸に取付けた揺動枠に軸方向に移動
し、揺動枠とともに揺動するカム接触子を設けて
この接触子を選択機構の操作により軸方向に移動
させて所望のカムの外周にバネ圧により接触させ
てカムの回転に伴ない接触子を揺動枠とともに揺
動させ、この揺動枠により針棒取付枠を揺動させ
てジグザグ模様を縫成するようにしたジグザグミ
シンに関するものである。[Detailed description of the invention] This invention has a plurality of pattern cams interlocked with the upper shaft of the sewing machine in the sewing machine arm, and moves in the axial direction to a swing frame attached to a shaft parallel to the pattern cams. A cam contactor that swings together with the cam is provided, and this contactor is moved in the axial direction by operation of a selection mechanism and brought into contact with the outer periphery of a desired cam by spring pressure, and as the cam rotates, the contactor is moved together with the swinging frame. This invention relates to a zigzag sewing machine that sews a zigzag pattern by swinging a needle bar mounting frame using the swinging frame.

上記のようなジグザグミシンの場合、カム接触
子が選択機構によつて所望のカムまで移動する場
合、接触子がカムの側面に当らないようにカムの
外周から外しておく必要がある。しかし、接触子
にはこれをカムに圧着させるために強いバネ圧が
かかつているためカム選択時に接触子を模様カム
から外す機構を設けると、選択機構の操作用の選
択ボタンなどの操作がきわめて重くなる欠点があ
る。さらに、従来の選択機構においては手動によ
つて行なわれるため針が針板上面よりも下方にあ
るときに即ち針が布を貫通している間に接触子が
カムから外れると針は必然的に横方向へ移動を余
儀なくされるが針は布にその移動を制止されたま
まのため針折れや曲がりなどが発生し、その結果
作業を続けると極めて危険であるなどの問題があ
る。 In the case of the above-mentioned zigzag sewing machine, when the cam contactor is moved to a desired cam by the selection mechanism, it is necessary to remove the contactor from the outer periphery of the cam so that it does not hit the side surface of the cam. However, strong spring pressure is applied to the contact to press it against the cam, so if a mechanism is provided to remove the contact from the pattern cam when selecting a cam, it will be extremely difficult to operate the selection button for operating the selection mechanism. It has the disadvantage of being heavy. Furthermore, since the conventional selection mechanism is manually operated, if the contact comes off the cam when the needle is below the top surface of the throat plate, that is, while the needle is penetrating the fabric, the needle will inevitably be Although the needle is forced to move laterally, the movement of the needle remains blocked by the cloth, which causes the needle to break or bend, resulting in problems such as the continued operation being extremely dangerous.

この考案は上記の欠点を解決するために、接触
子を模様カムの外周から外す操作を針が布の上方
に位置する間にミシンの上軸の回転力により行な
うようにしミシンが停止中であつてもあるいは回
転中であつても選択操作が極めて円滑にかつ安全
に行なわれる接触子外し機構を提供するものであ
る。 In order to solve the above-mentioned drawbacks, this invention uses the rotational force of the upper shaft of the sewing machine to remove the contactor from the outer periphery of the pattern cam while the needle is positioned above the fabric. To provide a contactor removal mechanism in which a selection operation can be performed extremely smoothly and safely even during rotation.

以下にこの考案の実施例を添付図面に基づいて
詳細に説明する。 Embodiments of this invention will be described in detail below with reference to the accompanying drawings.

第１図において、１はミシンアーム２に回動自
在に取付けた上軸であり、３はこの上軸に直交
し、ウオームギヤーなどを介して連動回転するカ
ム軸であつてこのカム軸３に複数の模様カム４を
固定する。 In Fig. 1, 1 is an upper shaft rotatably attached to the sewing machine arm 2, and 3 is a camshaft that is orthogonal to this upper shaft and rotates in conjunction with it via a worm gear. A plurality of pattern cams 4 are fixed.

第１図，第４図の６は揺動枠で、カム軸３と平
行の軸７によりミシンアーム２に揺動自在に取付
ける。８は接触子で、この接触子８の横孔に軸７
が摺動自在に嵌合し接触子８の下端の突片９は揺
動枠６の底辺に設けたガイド溝１０に摺動自在に
係合させて接触子８と揺動枠６が共に揺動するよ
うにし、接触子８の前部には模様カム４に下方か
ら接触するローラ１１を設け、このローラ１１を
カム４に向けて圧着せしめるように揺動枠６に回
転力を付与するバネを適所に設ける。 Reference numeral 6 in FIGS. 1 and 4 denotes a swing frame, which is swingably attached to the sewing machine arm 2 via a shaft 7 parallel to the camshaft 3. 8 is a contact, and a shaft 7 is inserted into the horizontal hole of this contact 8.
The protruding piece 9 at the lower end of the contact 8 is slidably engaged with the guide groove 10 provided at the bottom of the swing frame 6, so that the contact 8 and the swing frame 6 swing together. A roller 11 that contacts the pattern cam 4 from below is provided at the front of the contact 8, and a spring that applies rotational force to the swing frame 6 so as to press the roller 11 toward the cam 4. be placed in the appropriate place.

第４図の１２は選択爪で、この爪１２はレバー
１３の先端に軸１４によつて揺動自在に取付けら
れ、レバー１３はその後端を軸１５により土台１
６に揺動自在に取付けられ、この土台１６はミシ
ンアーム２に固定する。 Reference numeral 12 in FIG. 4 is a selection pawl, and this pawl 12 is swingably attached to the tip of a lever 13 by a shaft 14, and the rear end of the lever 13 is connected to a base by a shaft 15.
6, and this base 16 is fixed to the sewing machine arm 2.

また、前記選択爪１２の先端下側のピン１７は
前記の接触子８の上端の係合溝１８に係合し、前
記軸１５には選択爪１２およびレバー１３に第４
図矢印方向の回転力を付与するバネ１９を取付け
るとともに選択爪１２をレバー１３に対して一定
位置以上に回らないようにするストツパ２０をレ
バー１３上に固定する。 Further, the pin 17 at the lower end of the selection claw 12 engages with the engagement groove 18 at the upper end of the contactor 8, and the shaft 15 has a fourth pin 17 attached to the selection claw 12 and the lever 13.
A spring 19 that applies a rotational force in the direction of the arrow in the figure is attached, and a stopper 20 that prevents the selection claw 12 from rotating beyond a certain position with respect to the lever 13 is fixed on the lever 13.

第１図，第２図，第５図の２１はミシンアーム
２の上部寄りにおいて、横方向の軸２３によつて
後端をそれぞれ揺動自在に取付けた複数の選択レ
バーであり、その先端上部にはミシンアーム２の
外部に露出する押ボタン式の選択ボタン２２が固
定してある。 Reference numerals 21 in FIGS. 1, 2, and 5 designate a plurality of selection levers whose rear ends are swingably attached to the upper part of the sewing machine arm 2 by horizontal shafts 23. A push button type selection button 22 exposed to the outside of the sewing machine arm 2 is fixed to the sewing machine arm 2.

２４は前記選択レバー２１群の前寄り下部にお
いて下端を横方向の軸２５により揺動自在に取付
けた係止板で、この板２４には下降した選択レバ
ー２１の前部の突片２６を係止する係止孔２７が
各レバー毎に設けてある。また、これらレバー２
１群の外側に別の復帰レバー２１′を第５図のよ
うに設け、その前部には復帰ボタン２２′と突片
２６′を設ける。このレバー２１′も軸２３に揺動
自在に取付けられているが腕３１はなく、係止板
２４には突片２６′に係合する係止孔はない。 Reference numeral 24 denotes a locking plate whose lower end is swingably attached to a horizontal shaft 25 at the front lower part of the group of selection levers 21, and this plate 24 locks the protrusion 26 at the front of the selection lever 21 that has been lowered. A locking hole 27 for locking is provided for each lever. Also, these levers 2
Another return lever 21' is provided on the outside of the first group as shown in FIG. 5, and a return button 22' and a protrusion 26' are provided at the front thereof. This lever 21' is also swingably attached to the shaft 23, but does not have an arm 31, and the locking plate 24 does not have a locking hole that engages with the protrusion 26'.

また、各レバー２１，２１′にはこれを上方へ
回動させるバネ２８を設け、係止板２４にはこれ
をレバー２１，２１′の方へ回動するバネを設け
る。 Further, each lever 21, 21' is provided with a spring 28 for rotating it upward, and the locking plate 24 is provided with a spring for rotating it toward the lever 21, 21'.

３０は選択レバー２１群の後方の選択板で、そ
の両側の前向片の上端を軸２３に回動自在に取付
け、その下端前部には前記各選択レバー２１の後
部下側の腕３１の下端後側が接触する受部３２を
設ける。この受部３２は第５図のように各レバー
２１毎に段違いになつており、各レバー２１が下
方へ回動するとその腕３１で受部３２を押して各
レバー２１に対応する角度に選択板３０を傾斜さ
せるようになつている。 Reference numeral 30 denotes a selection plate at the rear of the group of selection levers 21, the upper ends of the front pieces on both sides of which are rotatably attached to the shaft 23, and the arms 31 on the rear lower side of each of the selection levers 21 are attached to the front lower end of the selection plate 30. A receiving portion 32 is provided with which the rear side of the lower end comes into contact. As shown in FIG. 5, the receiving portions 32 are arranged at different levels for each lever 21, and when each lever 21 rotates downward, the receiving portion 32 is pushed with its arm 31 to move the selection plate to an angle corresponding to each lever 21. 30 is inclined.

前記選択板３０の下部には第５図のように下向
きの腕３４を設け、この腕３４の下端側方の横向
きのピン３５を前記選択爪１２上に突出している
軸１４上に第４図のように接触させる。また、前
記のレバー１３に働くバネ１９によつてレバー１
３に第４図の矢印方向の回転力を付与してあるか
ら、この回転力が軸１４、ピン３５を介して選択
板３０に前向きの力として伝えられる。 A downward arm 34 is provided at the bottom of the selection plate 30 as shown in FIG. Make contact like this. In addition, the lever 1 is moved by the spring 19 acting on the lever 13.
3 is applied with a rotational force in the direction of the arrow in FIG. 4, this rotational force is transmitted to the selection plate 30 as a forward force via the shaft 14 and pin 35.

第２図，第３図の３６は上軸１に固定したカム
で、このカム３６の上方前寄りには回転体３７を
設けてある。この回転体３７は軸３８によりミシ
ンアーム２に回転自在に取付けられ、外周には、
カム３６により押動される３本の脚３９が等間隔
放射状に設けてある。なお、カム３６が脚３９を
押動する時期は図示省略してある針棒下端のミシ
ン針が針板上面より上にある間となるよう針棒の
上下動と調時させてある。第２図，第３図の４０
は前端を前記の軸２５によつてミシンアーム２に
揺動自在に取付けた係合爪で、前記回転体３７の
脚３９に係脱し、前端の上向き係合片４１は第２
図のように係止板２４の前側に係合している。 36 in FIGS. 2 and 3 is a cam fixed to the upper shaft 1, and a rotating body 37 is provided at the upper front of this cam 36. This rotary body 37 is rotatably attached to the sewing machine arm 2 by a shaft 38, and on the outer periphery,
Three legs 39 pushed by a cam 36 are radially provided at equal intervals. The timing at which the cam 36 pushes the leg 39 is timed with the vertical movement of the needle bar so that the sewing machine needle at the lower end of the needle bar (not shown) is above the upper surface of the needle plate. 40 in Figures 2 and 3
is an engaging pawl whose front end is swingably attached to the sewing machine arm 2 by the shaft 25, and engages with and disengages from the leg 39 of the rotating body 37, and the upward engaging piece 41 at the front end is attached to the second
As shown in the figure, it engages with the front side of the locking plate 24.

４２は前記軸２５により前部を回動自在に取付
けた揺動レバーで下部中程を突部５１とし、その
後部を凹入弧状面５２としてあり、前記回転体３
７上に臨んでいる。このレバー４２と前記爪４０
は別々に揺動するようになつており、、爪４０に
は回転体３７の方向へのバネ圧が加わつている。
また、前記レバー４２の一側には押上部材４３が
一体に形成されている。 Reference numeral 42 denotes a rocking lever whose front part is rotatably attached to the shaft 25, and has a protrusion 51 in the middle of its lower part and a recessed arc-shaped surface 52 in its rear part.
7 is on the way. This lever 42 and the claw 40
are adapted to swing separately, and spring pressure is applied to the claws 40 in the direction of the rotating body 37.
Further, a push-up member 43 is integrally formed on one side of the lever 42.

第１図の４４はミシンアーム２に固定した取付
土台で、その一側に揺動部材４５の上端が軸４６
により揺動自在に取付けられ、この部材４５の上
部から前方へ突出させた片４７の前部下側が前記
押上部材４３の端部上側に接触する。また、この
部材４５の下端と前記揺動枠６の一側に設けた上
向きの腕４８の上端に連杆４９の両端を軸により
回動自在に連結する。また、前記揺動部材４５の
下端には、図示省略してある針棒取付枠を揺動さ
せてジグザグ縫を行なわせる連杆５０を連結す
る。 Reference numeral 44 in FIG. 1 is a mounting base fixed to the sewing machine arm 2, and the upper end of the swinging member 45 is attached to a shaft 46 on one side.
The lower front side of a piece 47 protruding forward from the upper part of this member 45 comes into contact with the upper end of the push-up member 43. Further, both ends of a connecting rod 49 are rotatably connected to the lower end of this member 45 and the upper end of an upward arm 48 provided on one side of the swing frame 6 by a shaft. Further, a connecting rod 50 is connected to the lower end of the swinging member 45 for swinging a needle bar mounting frame (not shown) to perform zigzag stitching.

上記の実施例において何れかの選択ボタン２２
を押下するとこれと一体の選択レバー２１が軸２
３を中心として下方へ若干回り、その突片２６が
係止板２４の係止孔２７に係止され、同時に腕３
１が受部３２を押すので選択板３０が軸２３を中
心に後方へ若干回り、その下部のピン３５が軸１
４を後方へ押す。 In the above embodiment, any selection button 22
When you press down, the selection lever 21 integrated with this moves to axis 2.
The projecting piece 26 is locked in the locking hole 27 of the locking plate 24, and at the same time, the arm 3
1 presses the receiving part 32, so the selection plate 30 rotates slightly backward around the shaft 23, and the pin 35 at the bottom of the selection board 30 pushes the shaft 1.
Push 4 backwards.

上記のように軸１４が押されると、選択爪１２
が軸１５を中心としてレバー１３とともに後方
（第４図の矢印と反対の方向）へ若干回りその先
端のピン１７が接触子８を後方へ移動させる。こ
のため選択ボタン２２を押下して選択した模様に
該当する模様カム４の外周に接触子８のローラ１
１が移動して止まる。 When the shaft 14 is pushed as described above, the selection claw 12
rotates slightly rearward (in the opposite direction to the arrow in FIG. 4) together with the lever 13 about the shaft 15, and the pin 17 at its tip moves the contact 8 rearward. Therefore, the roller 1 of the contactor 8 is attached to the outer periphery of the pattern cam 4 corresponding to the pattern selected by pressing the selection button 22.
1 moves and stops.

しかし、ローラ１１が移動するさい、目的のカ
ム４の手前のカム４の側部にローラ１１が当つて
ローラ１１が目的のカム４まで移動できない場合
がある。 However, when the roller 11 moves, the roller 11 may come into contact with the side of the cam 4 in front of the target cam 4, and the roller 11 may not be able to move to the target cam 4.

この場合、レバー１３のみが所定の角度まで動
き、選択爪１２は軸１４を中心に回動した状態と
なる。 In this case, only the lever 13 moves to a predetermined angle, and the selection claw 12 is rotated about the shaft 14.

一方、上記のように選択ボタン２２を押す前は
第２図，第６図のように回転体３７の上向きの脚
３９の後部に係合爪４０が係合し、かつ揺動レバ
ー４２の弧状面５２がバネ圧により脚３９を後方
に押しているため、回転体３７の回転は阻止さ
れ、他の脚３９はカム３６の回転圏外にある。 On the other hand, before pressing the selection button 22 as described above, the engaging pawl 40 engages with the rear part of the upwardly facing leg 39 of the rotating body 37 as shown in FIG. 2 and FIG. Since the surface 52 pushes the leg 39 rearward due to spring pressure, rotation of the rotating body 37 is prevented, and the other leg 39 is outside the range of rotation of the cam 36.

しかし、選択ボタン２２が押されて前記のよう
に係止板２４が前方へ回つたとき係合爪４０の係
合片４１が第７図のように押されて脚３９から外
れる。このため揺動レバー４２の弧状面５２が脚
３９を後方へ押すので回転体３７は第８図，第９
図のように若干回り、下部の脚３９をカム３６の
回転圏内に入れる。 However, when the selection button 22 is pressed and the locking plate 24 is rotated forward as described above, the engaging piece 41 of the engaging claw 40 is pushed and removed from the leg 39 as shown in FIG. For this reason, the arcuate surface 52 of the swinging lever 42 pushes the leg 39 backward, so that the rotating body 37 is rotated as shown in FIGS.
Rotate slightly as shown in the figure, and place the lower leg 39 within the range of rotation of the cam 36.

この状態で上軸１が第９図の矢印方向に回転を
始めミシン針が針板上面よりも上方に位置すると
第１０図のようにカム３６が脚３９を押動して回
転体３７を回動するから第１１図のように回転体
３７の他の脚３９が揺動レバー４２の突部５１を
押して上方へ回動させ、これと一体の押上部材４
３で揺動部材４５の片４７を上方へ回す。このた
め揺動部材４５が軸４６を中心にカム軸３の方へ
回り、連杆４９を介して腕４８を第１図に向かつ
て右回りに若干回動させるのでローラ１１はカム
４から離れ、選択爪１２はバネ１９により所望の
カム４に移動し、上軸１が更に回転すると脚３９
が第１２図，第１３図のように突部５１を通過す
るのでレバー４２は押上部材４３とともに下降
し、揺動枠６も戻りローラ１１がバネにより所望
のカム４の外周に接触し、カム４の回転とともに
揺動し、連杆５０を介して針棒取付枠を揺動させ
て所望のジグザグ模様を縫成する。 In this state, when the upper shaft 1 begins to rotate in the direction of the arrow in FIG. 9 and the sewing machine needle is positioned above the upper surface of the needle plate, the cam 36 pushes the leg 39 and rotates the rotating body 37 as shown in FIG. As shown in FIG. 11, the other leg 39 of the rotating body 37 pushes the protrusion 51 of the swinging lever 42 to rotate it upward, and the push-up member 4 integrated therewith
3, rotate the piece 47 of the swinging member 45 upward. Therefore, the swinging member 45 rotates around the shaft 46 toward the camshaft 3, and the arm 48 is rotated slightly clockwise toward FIG. , the selection claw 12 is moved to the desired cam 4 by the spring 19, and when the upper shaft 1 further rotates, the leg 39 is moved.
passes through the protrusion 51 as shown in FIGS. 12 and 13, so the lever 42 descends together with the push-up member 43, and the swinging frame 6 also returns so that the roller 11 comes into contact with the outer periphery of the desired cam 4 due to the spring, and the cam 4, the needle bar mounting frame is swung through the connecting rod 50 to sew a desired zigzag pattern.

このとき回転体３７の上方の脚３９は第１３図
のように係合爪４０に係止され、他の脚３９はカ
ム３６の回転圏外となつて第６図と同様となる。 At this time, the upper leg 39 of the rotating body 37 is engaged with the engaging pawl 40 as shown in FIG. 13, and the other legs 39 are out of the range of rotation of the cam 36, as shown in FIG. 6.

上記のような操作で選択した所望のカム４によ
り模様を縫成したのち異なる模様を縫成するには
他の所望の選択ボタン２２を押下すると前回と同
様の作用でつぎの模様縫ができる状態となる。 After sewing a pattern using the desired cam 4 selected by the above operation, press another desired selection button 22 to sew a different pattern, and the next pattern can be sewn with the same operation as the previous one. becomes.

さらに、ミシンの回転中に上記操作を行なつた
場合にはミシン針が何処の位置にあつても所望の
選択ボタンを押下し得るが選択した模様カムに接
触子が移動を可能とするためには上軸のカム３６
が第１０図のように脚３９を押動して回転体３７
を回動する時まで待たねばならないからミシン針
が布に刺通せる時には前記の接触子の模様カムか
ら外れることはなく円滑かつ安全である。 Furthermore, if the above operation is performed while the sewing machine is rotating, the desired selection button can be pressed no matter where the sewing machine needle is located, but in order to allow the contact to move to the selected pattern cam, is the upper shaft cam 36
pushes the leg 39 as shown in FIG.
Since the sewing machine needle has to wait until it is time to rotate the needle, it does not come off from the pattern cam of the contactor when the sewing machine needle can pierce the cloth, making it smooth and safe.

なお、全部の選択ボタン２２を不作用位置に復
帰させるには端部の復帰ボタン２２′で復帰レバ
ー２１′を押下すれば、その突片２６′が係止板２
４を押動して係止孔２７に係合している突片２６
を外して復帰させ、復帰レバー２２′はバネによ
り元に戻る。 In addition, in order to return all the selection buttons 22 to the inactive position, press down the return lever 21' with the return button 22' at the end, and the protrusion 26' will be pressed against the locking plate 2.
4 and is engaged with the locking hole 27.
The return lever 22' is returned to its original position by the spring.

この考案は上記のようにミシンアーム２に設け
た選択ボタン２２などの操作により、選択爪１２
を動かしカム接触子８を複数の模様カム４の所望
のものに接触させるようにしたミシンにおいて、
上軸１に固定したカム３６が回転体３７の脚３９
を押動して回転体３７の他の脚３９が揺動レバー
４２を動かしてこれに連動する接触子８を模様カ
ム４の外周から外す作用をするので、接触子８を
動かす選択爪１２をミシンアームに取付けたレバ
ー１３に回動自在に取付けてバネ圧を加え選択操
作後と同時に接触子８が所望の模様カム４に接触
するようにできる。従つて選択のさいの選択ボタ
ン２２などの操作がきわめて軽くなる利点を有し
接触子８の模様カム４からの離脱がミシン針が布
の上方にある期間にのみに行なわれるようにカム
を調時してあるのでミシン針が布に貫通している
ために生じる種々の危険な問題が回避され極めて
安全である。また、回転体３７は選択操作が終り
ミシンが運転を開始した時点では脚３９が係合爪
４０の係合と、揺動レバー４２の押圧力とにより
回転しないように固定されるとともに各脚３９が
上軸１のカム３６の回転圏外となるのでミシンの
運転はきわめて円滑である。更につぎの選択操作
にさいしては選択機構に属する係止板２４などの
作用で係合爪４０が回転体３７の脚３９から外れ
ると同時に揺動レバー４２の押圧力により他の脚
３９が上軸１のカム３６の回転圏内に自動的に入
り、直ちにミシンの運転が開始される状態とな
り、接触子８は上軸１が１回転するまでの間に脚
３９を動かして接触子８を正しい位置とするので
模様縫目が乱れるおそれがないなどの効果を有し
ている。 In this invention, the selection claw 12 is operated by operating the selection button 22 provided on the sewing machine arm 2 as described above.
In the sewing machine in which the cam contactor 8 is brought into contact with a desired one of the plurality of pattern cams 4,
The cam 36 fixed to the upper shaft 1 is connected to the leg 39 of the rotating body 37.
The other leg 39 of the rotating body 37 moves the swinging lever 42 and removes the contact 8 linked thereto from the outer periphery of the pattern cam 4. It is rotatably attached to a lever 13 attached to a sewing machine arm and spring pressure is applied so that the contact 8 comes into contact with the desired pattern cam 4 at the same time after the selection operation. Therefore, the operation of the selection button 22 etc. during selection is extremely easy, and the cam is adjusted so that the contact 8 is separated from the pattern cam 4 only during the period when the sewing machine needle is above the fabric. It is extremely safe as it avoids various dangerous problems caused by the sewing machine needle penetrating the fabric. Furthermore, when the sewing machine starts operating after the selection operation is completed, the rotating body 37 is fixed so that the legs 39 do not rotate due to the engagement of the engaging claws 40 and the pressing force of the swing lever 42. is out of the range of rotation of the cam 36 of the upper shaft 1, so the sewing machine operates extremely smoothly. Furthermore, in the next selection operation, the engagement claw 40 is disengaged from the leg 39 of the rotating body 37 by the action of the locking plate 24 belonging to the selection mechanism, and at the same time, the other leg 39 is raised by the pressing force of the swing lever 42. The machine automatically enters the rotational range of the cam 36 of the shaft 1, and the sewing machine starts operating immediately, and the contact 8 moves the leg 39 until the upper shaft 1 rotates once to correct the contact 8. This has the advantage that there is no risk of the pattern stitches being disordered because of the position.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの考案を実施したミシン要部の内部
構造を示す正面図、第２図は同上の一部を拡大し
た縦断側面図、第３図はこの考案の要部の分解斜
視図、第４図は選択爪付近の拡大平面図、第５図
は選択レバー付近の分解斜視図、第６図ないし第
１３図はこの考案の装置の作用を説明する断面図
である。 １……上軸、４……模様カム、６……揺動枠、
８……接触子、１２……選択爪、２２……選択ボ
タン、２３，２５，３８……軸、２４……係止
板、３６……カム、３７……回転体、３９……
脚、４０……係合爪、４１……係合片、４２……
揺動レバー。 Fig. 1 is a front view showing the internal structure of the main parts of a sewing machine implementing this invention, Fig. 2 is an enlarged longitudinal cross-sectional side view of a part of the same, and Fig. 3 is an exploded perspective view of the main parts of this invention. FIG. 4 is an enlarged plan view of the vicinity of the selection claw, FIG. 5 is an exploded perspective view of the vicinity of the selection lever, and FIGS. 6 to 13 are sectional views illustrating the operation of the device of this invention. 1... Upper shaft, 4... Pattern cam, 6... Swing frame,
8... Contact, 12... Selection claw, 22... Selection button, 23, 25, 38... Shaft, 24... Locking plate, 36... Cam, 37... Rotating body, 39...
Leg, 40... Engaging claw, 41... Engaging piece, 42...
Swinging lever.

Claims (1)

【実用新案登録請求の範囲】 １ ミシン上軸に連動して回転する複数の模様カ
ムを設け、この模様カムと平行の軸を中心とす
る揺動枠には、これとともに揺動し、軸方向に
移動するカム接触子を設け、この接触子を選択
ボタンなどの操作で移動させて所望の模様カム
の外周にバネ圧により圧着させるカム選択機構
を設けたジグザグミシンにおいて、ミシン上軸
と平行の軸を中心とする回転体に複数の脚を放
射状に設けるとともに、この回転体の脚を押動
するカムをミシン上軸に固定し、前記回転体と
平行の軸には、上軸のカムで回動された前記回
転体の脚を係止して、回転体の脚を上軸の回転
圏外に保持し、選択機構の操作時に回転体の脚
から外れるように前記選択機構に連動する係合
爪と、上軸のカムにより回転体が回されたとき
その脚で押動されて前記接触子を模様カムより
外し、回転体の脚より係合爪が外れたとき脚を
押動して他の脚を上軸のカムの回転圏内に入れ
るように前記選択機構に連動する揺動レバーを
それぞれ揺動自在に取付けたことを特徴とする
ジグザグミシンの模様カム接触子外し装置。 ２ 上軸のカムは針棒に取付けたミシン針が針板
上面から上方に位置している間にのみ回転体を
押動する形状に形成してあることを特徴とする
実用新案登録請求の範囲第１項記載のジグザグ
ミシンの模様カム接触子外し装置。 ３ 上軸と平行の軸を中心とする回転体には３等
分間隔で３方に延びた３本の脚を設けたことを
特徴とする実用新案登録請求の範囲第１項記載
のジグザグミシンの模様カム接触子外し装置。[Claims for Utility Model Registration] 1. A plurality of pattern cams are provided that rotate in conjunction with the upper shaft of the sewing machine, and a swing frame centered on an axis parallel to the pattern cams is provided with a swing frame that swings together with the pattern cams and rotates in the axial direction. In a zigzag sewing machine, a cam contactor is provided that moves to A plurality of legs are provided radially on a rotating body centered on the shaft, and a cam for pushing the legs of the rotating body is fixed to the upper shaft of the sewing machine, and a cam of the upper shaft is attached to a shaft parallel to the rotating body. An engagement interlocking with the selection mechanism that locks the rotated legs of the rotating body, holds the legs of the rotating body outside the rotation range of the upper shaft, and removes them from the legs of the rotating body when the selection mechanism is operated. When the rotating body is rotated by the pawl and the cam on the upper shaft, the leg is pushed to remove the contactor from the pattern cam, and when the engaging pawl is disengaged from the leg of the rotating body, the leg is pushed and other A pattern cam contactor removal device for a zigzag sewing machine, characterized in that rocking levers interlocked with the selection mechanism are each swingably mounted so that the legs of the upper shaft are placed within the range of rotation of the cam of the upper shaft. 2. Claims for Utility Model Registration characterized in that the cam of the upper shaft is formed in a shape that pushes the rotating body only while the sewing machine needle attached to the needle bar is positioned above the top surface of the throat plate. The pattern cam contactor removing device for a zigzag sewing machine according to item 1. 3. The zigzag sewing machine according to claim 1 of the utility model registration claim, characterized in that a rotating body centered on an axis parallel to the upper axis is provided with three legs extending in three directions at equal intervals of three. Pattern cam contactor removal device.