JPS5940943Y2 - Straight stitch mechanism of pattern sewing machine - Google Patents
Straight stitch mechanism of pattern sewing machineInfo
- Publication number
- JPS5940943Y2 JPS5940943Y2 JP3782380U JP3782380U JPS5940943Y2 JP S5940943 Y2 JPS5940943 Y2 JP S5940943Y2 JP 3782380 U JP3782380 U JP 3782380U JP 3782380 U JP3782380 U JP 3782380U JP S5940943 Y2 JPS5940943 Y2 JP S5940943Y2
- Authority
- JP
- Japan
- Prior art keywords
- cam
- sewing machine
- pattern
- follower
- swing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Sewing Machines And Sewing (AREA)
Description
【考案の詳細な説明】
本考案は模様縫いミシンの直線縫い機構に関するもので
ある。[Detailed Description of the Invention] The present invention relates to a straight stitch mechanism for a pattern stitch sewing machine.
本考案の実施例を図面により説明すると、ミシン機枠(
図示しない)のアーム部内の上方部において、ミシン主
軸(図示しない)との直交方向に回転可能に支持し、且
つ斜歯車1を介して主軸に連動して回転するカム軸2上
に複数の振りカムと複数の送りカムと一つの円形カム3
とを積層した模様カムユニット4をカム軸2と共に回転
するように設置し、このカム軸2左側に支軸5をカム軸
2に平行に支持し、その支軸5に一側部6aを長くして
コ字状に形成し、その両側部6a、6b上端に平行に対
向する一対の支片6C,6Cを形成した揺動枠6を上記
模様カムユニット4を挾むように設は且つ支軸5の軸線
を中心に揺動可能に支持すると共に、揺動枠6と機枠(
図示しない)との間に適宜配置したばね7により揺動枠
6を常には支軸5を中心に第1図時計方向に作用力を付
与する。To explain the embodiment of the present invention using drawings, the sewing machine frame (
In the upper part of the arm of the sewing machine (not shown), a plurality of swings are mounted on a camshaft 2 that is rotatably supported in a direction orthogonal to the main shaft of the sewing machine (not shown) and rotates in conjunction with the main shaft via a helical gear 1. Cam, multiple feed cams and one circular cam 3
A patterned cam unit 4 is installed to rotate together with the camshaft 2, and a support shaft 5 is supported on the left side of the camshaft 2 in parallel to the camshaft 2. A swinging frame 6 is formed in a U-shape, and has a pair of supporting pieces 6C, 6C facing each other in parallel on the upper ends of both sides 6a, 6b. The swing frame 6 and the machine frame (
(not shown), a spring 7 is appropriately arranged between the swing frame 6 and the swing frame 6 to apply a force acting clockwise in FIG. 1 about the support shaft 5 at all times.
支軸5の上方には上端に上記模様カムユニット4の一つ
のカムに係合する係合部を形成すると共に、下端をコ字
状に折曲形成して後端面に縦方向の長孔8aを形成し、
且つ中央基部にも案内孔8bを形成したカム追従子8の
下端を揺動可能に、且つ軸方向に摺動可能に支持し、揺
動枠6の支片6C,6C間に上記案内孔8b内を貫通す
る案内軸9を配置する。Above the support shaft 5, an engaging portion that engages with one cam of the patterned cam unit 4 is formed at the upper end, and the lower end is bent into a U-shape to form a longitudinal long hole 8a in the rear end surface. form,
The lower end of the cam follower 8, which also has a guide hole 8b formed in the central base, is supported swingably and slidably in the axial direction, and the guide hole 8b is provided between the support pieces 6C of the swing frame 6. A guide shaft 9 is arranged to pass through the inside.
ミシンアーム部内の上記揺動枠6より下方において、回
動軸10をカム軸2に直交する軸線を中心に回動可能に
支持すると共に、この回動軸10に平行に操作軸(図示
しない)をその一端をミシン機枠の後端面から突出して
回動可能に支持し、その突出端には操作ダイアル(図示
しない)を固定する。A rotating shaft 10 is supported below the swinging frame 6 in the sewing machine arm so as to be rotatable about an axis perpendicular to the camshaft 2, and an operating shaft (not shown) is provided parallel to the rotating shaft 10. One end thereof projects from the rear end surface of the sewing machine frame and is rotatably supported, and an operation dial (not shown) is fixed to the projecting end.
回動軸10には切り離しカム11.選択カム12及び振
り幅制御カム13を順次固定配置すると共に、平歯車1
4に噛合うピニオン(図示しない)により操作軸(図示
しない)に連動させる。The rotation shaft 10 has a separation cam 11. The selection cam 12 and the amplitude control cam 13 are sequentially fixedly arranged, and the spur gear 1
A pinion (not shown) that meshes with the operating shaft (not shown) is interlocked with the operating shaft (not shown).
なお、振り幅制御カム13には、高位部(第4図A)と
低位部(第4図B)及び凸部(第4図C)を設ける。The amplitude control cam 13 is provided with a high portion (FIG. 4A), a low portion (FIG. 4B), and a convex portion (FIG. 4C).
上記支軸5の一端には上下方向の係合部15aを設けた
揺動体15の下端部を揺動可能に支持すると共に、揺動
枠6の一方の支片6Cから突出させた案内軸9の一端を
揺動体15の上端部に連結する。A guide shaft 9 that swingably supports the lower end of a swinging body 15 provided with a vertical engagement portion 15a at one end of the support shaft 5, and protrudes from one support piece 6C of the swing frame 6 One end is connected to the upper end of the rocking body 15.
この揺動体15の係合部15aには、一端を針棒揺動体
16に連結し、常には巻ばね17の弾性力を受けて右方
向に作用力を付与した連動杆18の他端部に設けた腕1
8a先端の係合ピン18bが圧接係合する。The engaging portion 15a of the oscillating body 15 has one end connected to the needle bar oscillating body 16, and the other end of an interlocking rod 18 which normally receives the elastic force of the coil spring 17 and applies an acting force in the right direction. provided arm 1
The engagement pin 18b at the tip of 8a is pressed into engagement.
また、支軸5の一端には、一端に振り幅制御カム13の
カム面13aに係合する接触部19aを有し、他端に連
動杆18の他端に設けた二叉部18c内に遊嵌するピン
19bを設けた支持体19の中間部を回動可能に且つ常
に反時計方向に作用力を付与して支持する。Further, one end of the support shaft 5 has a contact portion 19a that engages with the cam surface 13a of the swing width control cam 13, and a forked portion 18c provided at the other end of the interlocking rod 18 at the other end. The intermediate portion of the support body 19 provided with the loosely fitted pin 19b is rotatably supported by always applying an acting force in the counterclockwise direction.
このため、振り幅制御カム13のカム面13aの変化に
より支持体19を介して連動杆18が上下方面に移動さ
れ、これにより揺動体15の係合部15aに対する腕1
8aの係合ピン18bの係合位置が変化する。Therefore, due to the change in the cam surface 13a of the swing width control cam 13, the interlocking rod 18 is moved vertically via the support body 19, and thereby the arm 1 relative to the engaging portion 15a of the rocking body 15
The engagement position of the engagement pin 18b of 8a changes.
切り離しカム11の外周面は高位部と低位部とが交互に
形成されており、このカム11の上方において中間部側
面にカム11の外周面に係合する係合ピン(図示しない
)を設けた伝動体20の一端をその他。The outer circumferential surface of the separation cam 11 is formed with alternating high and low portions, and above the cam 11, an engaging pin (not shown) that engages with the outer circumferential surface of the cam 11 is provided on the side surface of the intermediate portion. One end of the transmission body 20 is connected to the other end.
端上端縁20aが揺動枠6の一側部6aの下端縁に対向
するように回動軸10に平行な軸21を中心に回動可能
に支持すると共に、機枠との間に適宜配置したばね22
により常には反時計方向(第1図)の作用力を付与する
。It is rotatably supported around a shaft 21 parallel to the rotation axis 10 so that the upper end edge 20a of the swing frame 6 faces the lower edge of the one side 6a of the swing frame 6, and is appropriately arranged between the swing frame 6 and the machine frame. Shita spring 22
Therefore, an acting force is always applied in the counterclockwise direction (Fig. 1).
選択カム12の左側方(第1図)において、上端にカム
追従子8の長孔8a内に遊嵌するピン(図示しない)を
設は中間部に選択カム12の外周カム面に係合する係合
部23aを形成した中間体23の下端を回動軸10に平
行な軸24を中心に回動可能に支持すると共に、機枠と
の間に適宜配置したばね25により上記係合部23aが
選択カム12の外周カム面に常に圧接係合するよう時計
方向(第1図)の作用力を付与する。On the left side of the selection cam 12 (FIG. 1), a pin (not shown) that loosely fits into the elongated hole 8a of the cam follower 8 is provided at the upper end and engages with the outer cam surface of the selection cam 12 at the middle part. The lower end of the intermediate body 23 forming the engaging portion 23a is rotatably supported around a shaft 24 parallel to the rotating shaft 10, and the engaging portion 23a is supported by a spring 25 appropriately arranged between the engaging portion 23a and the machine frame. Applying force in the clockwise direction (FIG. 1) so that the selection cam 12 always presses into contact with the outer peripheral cam surface of the selection cam 12.
選択カム12には、カム追従子8を上記模様カムユニッ
ト4の複数の振りカム及び円型カム3のうちの一つに選
択的に対向させるための複数のカム面が形成されている
。The selection cam 12 is formed with a plurality of cam surfaces for selectively causing the cam follower 8 to face one of the plurality of swing cams and the circular cam 3 of the pattern cam unit 4.
ミシンアーム部先端のあご部(図示しない)には、軸1
6aにより揺動可能に支持した針棒揺動体16を設け、
針棒揺動体16に上下動可能に支持すると共に、ミシン
の主軸に連動して上下動しその下端に針26を支持した
針棒27の下方には、ミシンベッド(図示しない)上に
配置し、布送り方向と直交する方向に長孔28aを形成
すると共に、布送り方向に平行に数条の切り欠き28b
を間隔をおいて形成した平担な板状の針板28を設ける
。The jaw (not shown) at the tip of the sewing machine arm has a shaft 1.
A needle bar swinging body 16 is provided swingably supported by 6a,
A needle bar 27 is supported on the needle bar oscillating body 16 so as to be movable up and down, moves up and down in conjunction with the main shaft of the sewing machine, and supports a needle 26 at its lower end. , a long hole 28a is formed in a direction perpendicular to the cloth feeding direction, and several cutouts 28b are formed in parallel to the cloth feeding direction.
A flat plate-shaped needle plate 28 is provided with spaces between the throat plate 28.
ミシン機構に連動して四運動する複数の送り歯29は布
を布送り方向に送るときには切り欠き28bから突出し
、布に係合して布を前進するようにする。A plurality of feed teeth 29, which move in conjunction with the sewing machine mechanism, protrude from the notch 28b when feeding the cloth in the cloth feeding direction, engage with the cloth, and move the cloth forward.
本考案は以上の構成であり、次にその作用を説明する。The present invention has the above configuration, and its operation will be explained next.
先づ、操作ダイヤル(図示しない)を回動操作すると、
操作軸(図示しない)、ピニオン(図示しない)、平歯
車14及び回動軸10を介して切り離しカム11.選択
カム12及び振り幅制御カム13が回動する。First, when you turn the operation dial (not shown),
The disconnection cam 11. The selection cam 12 and the amplitude control cam 13 rotate.
この回動により、切り離しカム11の高位部により、係
合ピン(図示しない)を介して伝動体20がばね22の
弾性力に抗して時計方向(第1図)に回動され、その他
端上端糸t20 aが揺動枠6の一側部6aの下端縁を
上方に押し上げ、揺動枠6に付与した弾性作用力に抗し
て、揺動枠6は支軸5上を反時計方向に回動する。Due to this rotation, the transmission body 20 is rotated clockwise (FIG. 1) by the high portion of the separation cam 11 via the engagement pin (not shown) against the elastic force of the spring 22, and the other end The upper end thread t20a pushes up the lower edge of one side 6a of the swing frame 6, and against the elastic force applied to the swing frame 6, the swing frame 6 moves counterclockwise on the support shaft 5. Rotate to.
この回動により案内軸9を介してカム追従子8は揺動枠
6と共に支軸5上を反時計方向に回動して、その上端の
係合部が模様カムユニツl−4のカム面から離れる。Due to this rotation, the cam follower 8 rotates counterclockwise on the support shaft 5 together with the swing frame 6 via the guide shaft 9, and the engaging portion at the upper end of the cam follower 8 moves from the cam surface of the pattern cam unit l-4. Leave.
また、切り離しカム11の低位部が係合ピン(図示しな
い)に対向すると伝動体20がばね22の作用力により
反時計方向に回動してその他端上端縁20aによる揺動
枠6の押し上げが解除され、揺動枠6はそれに付与した
弾性作用力により上記とは反対方向に回動して、カム追
従子8の上端の係合部が模様カムユニット4の対向する
カム面に圧接係合するようになる。Further, when the lower part of the separation cam 11 faces an engagement pin (not shown), the transmission body 20 is rotated counterclockwise by the acting force of the spring 22, and the swing frame 6 is pushed up by the upper edge 20a of the other end. When the swing frame 6 is released, the swing frame 6 rotates in the opposite direction to the above due to the elastic acting force applied thereto, and the engagement portion at the upper end of the cam follower 8 presses into engagement with the opposing cam surface of the pattern cam unit 4. I come to do it.
切り離しカム11の回動によりその高位部と低位部が交
互に伝動体20の係合ピン(図示しない)に対向する毎
に追従子8の上端の係合部が模様カムユニット4のカム
面に係合及び離脱を交互にくり返すようになる。As the separation cam 11 rotates, the upper end of the follower 8 is brought into contact with the cam surface of the pattern cam unit 4 each time its high and low parts alternately face the engagement pin (not shown) of the transmission body 20. Engagement and disengagement will be repeated alternately.
そして、その離脱の間に選択カム12のカム面変化によ
り中間体23を介してカム追従子8は支軸5上を軸方向
に摺動されて、複数の振りカム及び円形カムのうちの−
っのカムとの対向位置に選択的に規制される。During the separation, the cam follower 8 is slid in the axial direction on the support shaft 5 via the intermediate body 23 due to the change in the cam surface of the selection cam 12, and the -
selectively regulated to a position facing the cam.
そして、回動軸10の回動に関連して移動するように、
ミシン機枠に適宜配置した模様表示パネルの指針(図示
しない)が選択する縫模様の表示に一致したときに、操
作ダイヤル(図示しない)の操作を止めれば、その縫模
様に関する振りカムまたは円形カムとの対向位置にカム
追従子8がセットされる。Then, so as to move in relation to the rotation of the rotation shaft 10,
When the needle (not shown) on the pattern display panel appropriately placed on the sewing machine frame matches the display of the selected sewing pattern, if you stop operating the operation dial (not shown), the swing cam or circular cam for that sewing pattern A cam follower 8 is set at a position opposite to.
そして、ミシンが駆動されると、模様カムユニット4が
回転上、このときカム追従子8は円形カム3に対向して
いる場合には、カム面変化が生じないので、これら追従
子8は静止したままである(ここ状態は直線縫いに対応
する)が、振りカムに対向している場合は、そのカム面
変化に追従して支軸5上を揺動するようになる。When the sewing machine is driven, the pattern cam unit 4 rotates, and if the cam followers 8 are opposed to the circular cam 3 at this time, the cam surface does not change, so these followers 8 remain stationary. (this state corresponds to straight stitching), but if it is facing the swing cam, it will swing on the spindle 5 following the change in the cam surface.
カム追従子8の揺動による揺動枠6の案内軸9の揺動に
連動して、揺動体15が支軸5上を揺動するようになり
、この揺動により係合ピン18bを介して、連動杆18
が第1図の左右方向に往復動され、送り歯29による布
の送りと関連して縫模様が形成される。In conjunction with the swinging of the guide shaft 9 of the swinging frame 6 due to the swinging of the cam follower 8, the swinging body 15 comes to swing on the support shaft 5, and due to this swinging, the te, interlocking rod 18
is reciprocated in the left-right direction in FIG. 1, and a sewing pattern is formed in conjunction with the feed of the cloth by the feed dog 29.
この針棒26の振り幅、すなわち、連動杆18の移動量
は揺動体15の係合部15aに対する係合ピン18bの
位置により決定され、この係合ピン18bの係合位置が
揺動体15の揺動中心である支軸5の軸心から遠くなる
にしたがって針棒の振幅が大きくなり、軸心に近くなる
にしたがって連動杆18の移動量、すなわち、針棒の振
幅が小さくなる3この揺動体15の係合部15aに対す
る連動杆18の係合ピン18bの位置は振り幅制御カム
13のカム面13aにより決定され、回動軸10の回動
によりそのカム面13aが変化するとその変化に追従し
て支持体19が支軸5上を一方向あるいは逆方向に回動
するようになり、この回動によって、そのピン19b及
び連動杆18の二叉部18Cを介して連動杆18を上下
方向に移動され、これにより上記係合ピン18bの係合
位置が決定される。The swing width of the needle bar 26, that is, the amount of movement of the interlocking rod 18 is determined by the position of the engagement pin 18b with respect to the engagement portion 15a of the oscillating body 15. The amplitude of the needle bar increases as it moves away from the axis of the support shaft 5, which is the center of oscillation, and the amount of movement of the interlocking rod 18, that is, the amplitude of the needle bar decreases as it approaches the axis. The position of the engagement pin 18b of the interlocking rod 18 with respect to the engagement portion 15a of the moving body 15 is determined by the cam surface 13a of the swing width control cam 13, and when the cam surface 13a changes due to the rotation of the rotation shaft 10, the position changes depending on the change. Following this, the support body 19 begins to rotate on the support shaft 5 in one direction or the opposite direction, and this rotation causes the interlocking rod 18 to move up and down via the pin 19b and the bifurcated portion 18C of the interlocking rod 18. This determines the engagement position of the engagement pin 18b.
そしてこの振り幅制御カム13のカム面13aは選択さ
れた縫模様にとって最適な振幅となるように係合ピン1
8bの係合位置を決定するように形成されている。The cam surface 13a of this swing width control cam 13 is adjusted so that the engaging pin 13 has an optimum amplitude for the selected sewing pattern.
8b is formed to determine the engagement position.
上述したように追従子8の係合部が円型カム3に対向し
ている場合は追従子8は静止した状態において、案内軸
9、揺動体15、連動杆18、及び針棒揺動体16を介
して針棒26を第3図実線の位置にお・く。As described above, when the engaging portion of the follower 8 faces the circular cam 3, the guide shaft 9, the swinging body 15, the interlocking rod 18, and the needle bar swinging body 16 are connected to each other while the follower 8 is stationary. 3, and place the needle bar 26 in the position shown by the solid line in FIG.
この時支持体19の接触部19aは振幅制御カム13の
カム面13aの高位部(第4図A)に係合して支持体1
9が第4図イの位置にあり、連動杆18の係合ピン18
bが揺動体15の下部において揺動体15の係合部15
aに圧接係合している。At this time, the contact portion 19a of the support body 19 engages with the high portion (FIG. 4A) of the cam surface 13a of the amplitude control cam 13, and the support body 19
9 is in the position shown in Fig. 4A, and the engagement pin 18 of the interlocking rod 18
b is the engagement portion 15 of the rocking body 15 at the lower part of the rocking body 15;
It is press-fitted to a.
この状態で、ミシンを駆動すると針27は針孔28aの
中央部で上下動しながら布を送り第2図点線で示すよう
に送り歯29を逸れた直線縫い目X(中基線縫い目)を
形成する。In this state, when the sewing machine is driven, the needle 27 moves up and down at the center of the needle hole 28a and feeds the fabric to form a straight seam .
追従子8の係合部が円型カム3に対向したま・振り幅制
御カム13を回動して、支持体19の接触部19aが振
り幅制御カム13のカム面13a低位部(第4図B)に
係合すると、支持体19は支軸5を軸として反時計方向
(第4図)に回動して連動杆18を上方に移動する。While the engaging part of the follower 8 faces the circular cam 3, the swing width control cam 13 is rotated, and the contact part 19a of the support body 19 contacts the lower part (fourth part) of the cam surface 13a of the swing width control cam 13. When engaged as shown in FIG. B), the support body 19 rotates counterclockwise (FIG. 4) about the support shaft 5 and moves the interlocking rod 18 upward.
この時、揺動体15の下端に設けられた脚部15bの左
側部が振り幅制御カム13の突出部13bの右側面(第
4図C)に係合して、揺動体15を支軸5を軸として反
時計方向(第4図)に回動して連動杆18の係合ピン1
8bを揺動体15の上部において揺動体15の係合部1
5aに圧接係合して左方向に移動すると共に、追従子8
の係合部は案内軸9を介して円型カム3のカム面より離
脱する。At this time, the left side of the leg 15b provided at the lower end of the swinging body 15 engages with the right side (FIG. 4C) of the protrusion 13b of the swing width control cam 13, and the swinging body 15 is moved to the support shaft 5. The engagement pin 1 of the interlocking rod 18 is rotated counterclockwise (Fig. 4) about the axis.
8b to the upper part of the oscillating body 15 and the engaging part 1 of the oscillating body 15.
5a and moves to the left, and the follower 8
The engaging portion separates from the cam surface of the circular cam 3 via the guide shaft 9.
連動杆18の左方向への移動によって針棒26は第3図
実線の位置から二点鎖線の位置に移動し、ミシンが駆動
すると針27は針孔28aの左側部で上下動しながら布
を送り、第2図一点鎖線で示すように送り歯29の上を
通るように直線縫い目Y(左基線縫い目)を形成する。By moving the interlocking rod 18 to the left, the needle bar 26 moves from the position shown by the solid line in FIG. Then, as shown by the dashed line in FIG. 2, a straight seam Y (left baseline seam) is formed so as to pass over the feed dog 29.
以上述べたように、本考案は、ミシン主軸に連動して固
定軸線を中心に回動する複数の模様カム群4と、その模
様カムの一つに選択的に係合しカム面変化により揺動量
を変える追従子8と、追従子8に連動して揺動する揺動
体15と、一端を針棒揺動体16に連結し常には弾性力
を受けて他端を揺動体15に圧接させることにより追従
子8を模様カム4外周に圧接させる連動体18と、一端
に接触部19aを形威し他端を連動体に連結し固定軸線
を中心に回動可能とした支持体19とを備えた模様縫い
ミシンにおいて、揺動体15に揺動中心より離れる方向
に伸びた脚部15bを設け、手回動操作により斬新定位
置に回動したとき、支持体19の接触部19aに係合し
、支持体19を回動して、連動体18の他端を揺動体1
5の揺動中心から離れた位置に移動する第1のカム面1
3a及び揺動体15の脚部15bに係合し揺動体15を
回動して追従子8を模様カム4外周から隔離する方向に
回動する第2のカム面13bを形成し、直線縫い目が送
り歯29を通るように第1及び第2のカム面13a、
13bにより連動体18を介して針棒揺動体16を移動
するカム体13とを設けたものである。As described above, the present invention includes a plurality of pattern cam groups 4 that rotate about a fixed axis in conjunction with the main shaft of the sewing machine, and a pattern cam that selectively engages one of the pattern cams and oscillates by changing the cam surface. A follower 8 that changes the amount of movement, a rocker 15 that swings in conjunction with the follower 8, one end of which is connected to the needle bar rocker 16, and the other end is always pressed against the rocker 15 under elastic force. The interlocking body 18 presses the follower 8 against the outer periphery of the pattern cam 4, and the supporting body 19 has a contact portion 19a at one end, connects the other end to the interlocking body, and is rotatable about a fixed axis. In the pattern stitch sewing machine, the swinging body 15 is provided with a leg portion 15b extending away from the center of swing, and the leg portion 15b engages with the contact portion 19a of the support body 19 when the leg portion 15b is rotated to the novel fixed position by manual rotation operation. , rotate the support body 19 to connect the other end of the interlocking body 18 to the rocking body 1.
The first cam surface 1 moves to a position away from the swing center of 5.
3a and the leg portions 15b of the rocking body 15 to form a second cam surface 13b that rotates the rocking body 15 in a direction to separate the follower 8 from the outer periphery of the pattern cam 4. first and second cam surfaces 13a so as to pass through the feed dog 29;
A cam body 13 that moves the needle bar oscillating body 16 via an interlocking body 18 by means of a cam body 13b is provided.
従来、この種の模様縫いミシンにおいては、直線縫い目
が送り歯29から離れその側方を通るものがあり、布の
縁部を直線縫いする場合には送り歯29が布押えと共同
して布の縫い目から離れた部分を挾んで送るので縫い目
部分は不安定な状態で確実に送られず縫い目が不揃いと
なり製品の価値を著しく低下する欠点があった。Conventionally, in this type of pattern stitch sewing machine, the straight seam sometimes separates from the feed dog 29 and passes along the side thereof, and when sewing the edge of the fabric in a straight line, the feed dog 29 works together with the presser foot to move the fabric. Since the part away from the seam is pinched and fed, the seam part is unstable and cannot be fed reliably, resulting in uneven seams, which significantly reduces the value of the product.
この欠点をなくするために、直線縫い目が送り歯29を
送る位置に交換するために前述した模様カム群4に円型
カムを設け、円型カムに追従子8が係合したとき、追従
子8に関連する揺動手段たる揺動体15、連動体18を
介して針棒26を所定位置に移動するものが提案されて
いるが、その位置に対応する円型カムを設けたのでそれ
だけ模様縫いの種類が少くなり、縫い機能が低下して模
様縫いミシンとしての商品価値が減少する欠点があった
。In order to eliminate this drawback, a circular cam is provided in the pattern cam group 4 described above in order to replace the straight seam with the position where the feed dog 29 is sent, and when the follower 8 engages with the circular cam, the follower It has been proposed that the needle bar 26 is moved to a predetermined position via a rocking body 15 and an interlocking body 18, which are rocking means related to 8, but since a circular cam corresponding to that position is provided, pattern sewing is much easier. This had the disadvantage that the number of types was reduced, the sewing function was reduced, and the commercial value of the pattern sewing machine was reduced.
本考案は前記の欠点をなくすることを目的とし、直線縫
いするとき縫い目が確実に送り歯29を通るように針棒
26を移動することができるようにしたので、布の縁部
を直線縫いする場合に、送り歯29が布押えと共同して
布縁部を挾んで確実に布送り方向に送るから、縫い目の
揃った商品価値の高い製品を得るのに効果があり、さら
に、ひものように巾の狭いものを縫うのに効果がある。The purpose of this invention is to eliminate the above-mentioned drawbacks, and the needle bar 26 can be moved to ensure that the seam passes through the feed dog 29 when sewing a straight line, so the edge of the fabric can be sewn in a straight line. In this case, the feed dog 29 cooperates with the presser foot to pinch the edge of the fabric and feed it in the fabric feeding direction, which is effective in obtaining products with high commercial value and uniform seams. It is effective for sewing narrow width items.
また直線縫い目が送り歯29を通るように針棒26を移
動するのにカム体13にカム面13a、 13bを設け
たので、前述のように所定位置に対応する円型カムに代
えて模様カムを設けることができるから模様カムの数が
多くなり、それだけ模様縫いの数がふえ、縫い機能が向
上して模様縫いミシンとしての商品価値が高くなる等大
いに効果がある。In addition, since the cam body 13 is provided with cam surfaces 13a and 13b for moving the needle bar 26 so that the straight stitch passes through the feed dog 29, a pattern cam is used instead of the circular cam corresponding to a predetermined position as described above. Since the number of pattern cams can be increased, the number of pattern stitches can be increased accordingly, the sewing function is improved, and the product value of the pattern stitch sewing machine is increased.
第1図は、本考案の他を省略した要部の斜視図であり、
第2,3図は作用説明図であり、第4図は支持体、揺動
体、及び連動杆の関係を示す説明図である。
図中、13は振り幅制御カム、15は揺動体、18は連
動杆19は支持体である。FIG. 1 is a perspective view of the main parts of the present invention, with other parts omitted;
2 and 3 are action explanatory diagrams, and FIG. 4 is an explanatory diagram showing the relationship between the support body, the swinging body, and the interlocking rod. In the figure, 13 is a swing width control cam, 15 is a swinging body, and 18 is an interlocking rod 19 is a support body.
Claims (1)
機枠に対して布送り方向との直交方向に揺動可能に支持
した針棒揺動体16と、針の揺動方向に長い針孔及び布
送り方向に沿う送り歯溝を形成した針板28と、ミシン
機構に連動して四運動し送り歯溝から出没し布押えと共
同して布を送る送り歯29と、ミシン機枠に回動可能に
支持しミシンの主軸に連動して基軸を中心に回動する複
数の模様カム群4と、模様カムの一つに選択的に係合可
能とし模様カムの回転によるカム面変化により揺動量が
変るように固定軸線を中心に揺動可能な追従子8と、追
従子の揺動に連動して揺動するとともに一側方に係合面
をもつ係合部及び揺動中心より離れる方向に伸びた脚部
を形成した揺動体15と一端を針棒揺動体に連結し他端
に支持した係合体を揺動体の係合部に対向させた連動体
18と、連動体に作用して係合体を揺動体の係合部に圧
接させ連動体を介して追従子を模様カム外周に圧接させ
る弾性体17と、一端に接触部を形成し他端を連動体に
連結し固定軸線を中心に回動可能とした支持体19と、
回動操作可能とし所定位置に回動したとき支持体の接触
部に係合し支持体を回動して連動体の係合体を揺動体の
揺動中心から離れた位置に移動する第1のカム面及び揺
動体の脚部に係合し揺動体を回動して追従子を模様カム
外周から隔離する方向に回動する第2のカム面とを形成
し直線縫い目が送り歯を通るように第1及び第2のカム
面により連動体を介して針棒揺動体を移動するカム体1
3とを設けた模様縫いミシンの直線縫い機構A needle bar oscillating body 16 supports a needle bar that moves up and down in conjunction with the main shaft of the sewing machine, and is supported so as to be swingable in a direction perpendicular to the cloth feeding direction with respect to the sewing machine frame, and a needle that is long in the direction of needle oscillation. A needle plate 28 having a hole and a feed dog groove along the cloth feeding direction, a feed dog 29 that moves in conjunction with the sewing machine mechanism and moves in and out of the feed dog groove to feed the cloth together with the presser foot, and a sewing machine frame. A plurality of pattern cam groups 4 that are rotatably supported and rotated around the base shaft in conjunction with the main shaft of the sewing machine, and a cam surface that can be selectively engaged with one of the pattern cams and change the cam surface by rotation of the pattern cam. a follower 8 that can swing around a fixed axis so that the amount of swing changes, an engagement part that swings in conjunction with the swing of the follower and has an engagement surface on one side, and a swing center. An oscillating body 15 having legs extending further apart, an interlocking body 18 having one end connected to the needle bar oscillating body and an engaging body supported at the other end facing the engaging portion of the oscillating body; An elastic body 17 that acts to press the engaging body against the engaging part of the rocking body and press the follower against the outer periphery of the pattern cam via the interlocking body, forms a contact part at one end, and connects and fixes the other end to the interlocking body. a support 19 rotatable around an axis;
A first element that can be rotated and, when rotated to a predetermined position, engages the contact portion of the support body, rotates the support body, and moves the engaging body of the interlocking body to a position away from the rocking center of the rocking body. A second cam surface that engages with the cam surface and the leg of the oscillator and rotates the oscillator in a direction to separate the follower from the outer periphery of the pattern cam is formed so that the straight seam passes through the feed dog. A cam body 1 that moves the needle bar rocking body via the interlocking body by the first and second cam surfaces.
3 Straight stitch mechanism of pattern stitch sewing machine
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3782380U JPS5940943Y2 (en) | 1980-03-22 | 1980-03-22 | Straight stitch mechanism of pattern sewing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3782380U JPS5940943Y2 (en) | 1980-03-22 | 1980-03-22 | Straight stitch mechanism of pattern sewing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS56139473U JPS56139473U (en) | 1981-10-21 |
JPS5940943Y2 true JPS5940943Y2 (en) | 1984-11-22 |
Family
ID=29633370
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3782380U Expired JPS5940943Y2 (en) | 1980-03-22 | 1980-03-22 | Straight stitch mechanism of pattern sewing machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5940943Y2 (en) |
-
1980
- 1980-03-22 JP JP3782380U patent/JPS5940943Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS56139473U (en) | 1981-10-21 |
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