JPS645586Y2 - - Google Patents
Info
- Publication number
- JPS645586Y2 JPS645586Y2 JP2561484U JP2561484U JPS645586Y2 JP S645586 Y2 JPS645586 Y2 JP S645586Y2 JP 2561484 U JP2561484 U JP 2561484U JP 2561484 U JP2561484 U JP 2561484U JP S645586 Y2 JPS645586 Y2 JP S645586Y2
- Authority
- JP
- Japan
- Prior art keywords
- feed
- slider
- forth
- differential
- shaft
- 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
Links
- 230000007246 mechanism Effects 0.000 claims description 16
- 238000009958 sewing Methods 0.000 claims description 10
- 239000004744 fabric Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【考案の詳細な説明】
この考案はミシンの送り装置に関し、ことに主
送り歯と差動送り歯とを備えたミシンの差動送り
装置に関する。[Detailed Description of the Invention] This invention relates to a feed device for a sewing machine, and more particularly to a differential feed device for a sewing machine that includes a main feed dog and a differential feed dog.
差動送り装置では通常、主送り歯及び差動送り
歯の上下動は主軸に設けた上下動用の偏心カムを
主送り台及び差動送り歯にそれぞれ係合させるこ
とにより、またその前後動は主軸に連動して揺動
する送り前後軸に主送りクランクと差動送りクラ
ンクとを固着し、各クランクをそれぞれリンクを
介して主送り台と差動送り台に連結することによ
り行われ、差動送りクランクとリンクとの連結部
は該クランクに沿つて移動できるように、すなわ
ち送り前後軸の軸心から径方向に延びる差動送り
クランクにリンク端に軸着のスライダーが嵌合し
てクランクに沿つて移動できるようにしている。 In a differential feed device, the vertical movement of the main feed dog and the differential feed dog is usually controlled by engaging eccentric cams for vertical movement provided on the main shaft with the main feed table and the differential feed dog, respectively. This is done by fixing a main feed crank and a differential feed crank to the front and rear feed shafts that swing in conjunction with the main shaft, and connecting each crank to the main feed table and differential feed table via links, respectively. The connecting portion between the dynamic feed crank and the link is configured so that it can move along the crank, in other words, a slider attached to the link end is fitted to the differential feed crank extending radially from the axis of the front and rear feed shafts. It allows you to move along.
しかして布に襞を寄せる襞取り工程時にはスラ
イダーの位置を送り前後軸より離れる方向にずら
して差動送り歯による布送り量を主送り歯による
ものよりも大きく設定し、またメリヤス地のよう
な伸縮性のある生地では布にしわが寄つたり、伸
びたりすることのないように主送り歯と差動送り
歯の布送り量を適当な比率に設定している。こう
した差動送り歯の布送り量の調整はある一定の区
間だけ襞取りを行う場合やメリヤス地を縦から横
方向に、或いはその逆に縫製する場合など縫製中
に差動送り歯の布送り量を急激に変化させる必要
のある場合にも行われる。 However, during the crease removal process in which the fabric is folded, the position of the slider is shifted away from the front and back feed axis to set the fabric feed amount by the differential feed dog to be larger than that by the main feed dog. For stretchable fabrics, the amount of fabric feed between the main feed dog and the differential feed dog is set at an appropriate ratio to prevent the fabric from wrinkling or stretching. Adjustment of the cloth feed amount of the differential feed dog is necessary when performing pleat removal only in a certain section, or when sewing stockinette fabric from vertical to horizontal direction or vice versa. It is also used when it is necessary to change the amount rapidly.
以上のような差動送り歯の布送り量を調節する
ためのスライダーの位置の調整は手動操作機構ま
たはパルスモータ等の駆動手段によつて行われ、
手動操作機構にはフレームに軸着の二又操作レバ
ーの二又部にスライダーに軸着の摺動子を嵌合さ
せたタイプのもの（第１Ａ図）とフレームに軸着
の操作レバーと摺動子とをリンクによつて連結し
たタイプのもの（第１Ｂ図）とがあり、前者の代
表的なものの一つが特公昭47−17019号に示され
る。しかしながらこの種の機構では差動送りクラ
ンク１の揺動により描くスライダー２の円弧軌跡
を該軌跡に接する直線で近似させるようにしてい
るため、すなわち差動送りクランク１の揺動中、
スライダー２は二又部３内を往復直線運動し、理
想上の円弧軌跡よりずれるため差動送りクランク
１に沿つて微振動するようになり、そのため両者
が摩耗し、ミシンの振動の原因ともなり、差動送
り歯の布送り作用に悪い影響を与える。これは二
又操作レバー４の回動による二又部３の傾き具合
によつて円弧軌跡よりのずれが大きくなる程スラ
イダー２の振動量も大きくなり問題となる。 The adjustment of the position of the slider for adjusting the cloth feed amount of the differential feed dog as described above is performed by a manual operation mechanism or a driving means such as a pulse motor.
The manual operation mechanism includes a two-pronged operating lever that is pivoted on the frame, and a slider that is attached to the slider on the forked part (Fig. 1A), and a two-pronged operating lever that is pivoted on the frame. There is a type (Fig. 1B) in which the rotor is connected by a link, and one of the representative examples of the former is shown in Japanese Patent Publication No. 17019/1983. However, in this type of mechanism, the arc locus of the slider 2 drawn by the swinging of the differential feed crank 1 is approximated by a straight line tangent to the trajectory, that is, during the swing of the differential feed crank 1,
The slider 2 moves linearly in a reciprocating manner within the fork 3, and as it deviates from the ideal arcuate trajectory, it begins to vibrate slightly along the differential feed crank 1, which causes wear on both parts and causes vibrations in the sewing machine. , which has a negative effect on the cloth feeding action of the differential feed dog. This becomes a problem because the amount of vibration of the slider 2 increases as the deviation from the circular arc trajectory increases depending on the degree of inclination of the fork portion 3 due to the rotation of the fork operating lever 4.
こうした問題は前者のものよりも改善はされは
するが、後者のタイプのもの（その一つが特公昭
56−15916号に示される）においてもほゞ同様に
生ずる。すなわち、スライダー６は差動送りクラ
ンク７の揺動中心Ｃ（送り前後軸の軸心）を中心
とする理想上の円弧軌跡を描かないで操作レバー
８とリンク９との軸着点ｂを中心とする円弧軌跡
を描き両者の間にずれが生じるためスライダーは
その分差動送りクランク７に沿つて往復動する。
この量は上記軸着点を送り前後軸に近付ければ近
付ける程、実際の円弧軌跡を理想上の円弧軌跡に
近付けることができる。そしてこの場合、前者の
直線で近似させるものと比べ両者間のずれは小さ
くなる。しかしながらこの機構では操作レバー８
を回動すると、上記軸着点が円弧軌跡を描いて移
動し、ある特定の位置では送り前後軸に近付いて
も操作レバー８を更に回すと送り前後軸より離れ
るようになり、したがつて上記軸着点が送り前後
軸より離れる程両軌跡間のずれが大きくなつてス
ライダー６の移動量も大きくなる。 Although these problems are improved over the former, they are of the latter type (one of which is the
56-15916) occurs in almost the same way. In other words, the slider 6 does not draw an ideal circular arc trajectory centered on the swing center C of the differential feed crank 7 (the axis center of the forward and backward feed shaft), but instead draws a trajectory centered on the pivot point b between the operating lever 8 and the link 9. Since the slider draws a circular arc locus and a deviation occurs between the two, the slider reciprocates along the differential feed crank 7 by that amount.
As for this amount, the closer the axis landing point is brought to the forward and backward axis of the feed, the closer the actual circular arc trajectory can be to the ideal circular arc trajectory. In this case, the deviation between the two becomes smaller than when the former is approximated by a straight line. However, in this mechanism, the operating lever 8
When the control lever 8 is rotated, the above-mentioned axis attachment point moves in a circular arc locus, and even if it approaches the forward and backward feed axis at a certain position, when the operating lever 8 is turned further, it moves away from the forward and backward feed axis, and therefore the above-mentioned The farther the axis attachment point is from the forward and backward feed axis, the greater the deviation between the two trajectories and the greater the amount of movement of the slider 6.
手動操作機構には以上述べたもののほかに特公
昭58−1955号に示されるように、スライダーが実
際に動く軌跡を理想上の円弧軌跡の弦に一致させ
るようにしたものも知られているが、この機構に
ついても理想上の円弧軌跡を直線で近似させよう
としているため第１Ａ図に示すタイプのものと同
様、両軌跡間のずれが比較的大きくなり好ましく
ない。 In addition to the above-mentioned manual operation mechanisms, there is also known a mechanism in which the trajectory of the slider's actual movement matches the chord of the ideal arc trajectory, as shown in Japanese Patent Publication No. 58-1955. Since this mechanism also attempts to approximate the ideal circular arc locus with a straight line, the deviation between the two loci becomes relatively large, which is undesirable, as in the type shown in FIG. 1A.
この考案はスライダーが描く実際の軌跡をでき
るだけ理想上の軌跡に近付け、両軌跡間のずれを
少くするためスライダーが円弧軌跡を描き、かつ
理想上の軌跡と中央部で接するようにしたもので
ある。 This idea is to make the actual trajectory drawn by the slider as close to the ideal trajectory as possible, and to reduce the deviation between the two trajectories, the slider draws an arcuate trajectory and touches the ideal trajectory at the center. .
以下本考案の実施例を図面によつて説明すると
主送り歯１１を取付けた主送り台１２と、該送り
台に並設され、差動送り歯１３を取付けた差動送
り台１４とはそれぞれ既知のものと同様、後部に
おいて案内溝１５にスライド可能に嵌合し、かつ
軸１７に軸着される角駒１８により上下方向に回
動可能かつスライド可能に支持されており、前部
の各案内溝２０には主軸２２に固着の偏心カム２
３に軸着される角駒２４がスライド可能に嵌合
し、偏心カム２３の回転により後部の角駒１８の
軸支点を中心に上下方向に揺動し、主送り歯１１
及び差動送り歯１３を上下動させるようになつて
いる。主軸２２にはまた主送り歯用の布送り量調
節装置２５（この装置は本案の要旨ではないので
詳細な説明は省略する）が設けられ、該装置の偏
心カム２６に送り前後ロツド２７の一端が外嵌
し、他端が送り前後軸２８に回動可能に装着され
る送りクランク２９に軸着され、主軸２２の回転
に連動してクランク２９を揺動させるようになつ
ており、送り前後ロツド２７にはまたその中間部
に溝３０が形成され、該溝に主送り台１２に軸着
の角駒３１がスライド可能に嵌合し、上記ロツド
２７の往復動により主送り台１２及び主送り歯１
１を前後動させるようになつている。以上は既知
のものと多少の構造上の違いはあるが、既知のも
のをそのまゝ利用しても何等差し控えはない。送
り前後軸２８にはまた送りクランク２９と一体を
なす円弧状の差動送りクランク３３が装着され、
好ましくは前後方向に揺動する差動送りクランク
３３が揺動中心に位置するとき、その曲率中心に
おいて差動送り台１４に軸着されるロツド３４と
上記差動送りクランク３３にスライド可能に嵌合
するスライダー３５とが連結されて差動送りクラ
ンク３３の揺動により差動送り台１４及び差動送
り歯１３を前後動させるようになつており、その
量すなわち差動送り量はスライダー３５を差動送
りクランク３３に沿つて移動し、その位置を変え
ることによつて調節される。スライダー３５を移
動させて差動送り量を変えるために調節機構が設
けてあり、次にこの機構について説明する。 Below, an embodiment of the present invention will be described with reference to the drawings. A main feed bar 12 to which a main feed dog 11 is attached, and a differential feed bar 14 to which a differential feed dog 13 is attached are installed in parallel to the main feed bar 12. Similar to the known one, it is slidably fitted into the guide groove 15 at the rear part and supported by a square piece 18 which is pivoted on the shaft 17 so as to be rotatable and slidable in the vertical direction. The guide groove 20 has an eccentric cam 2 fixed to the main shaft 22.
A square piece 24 pivotally attached to the main feed dog 11 is slidably fitted into the main feed dog 11 and swings vertically about the pivot of the rear square piece 18 by rotation of the eccentric cam 23.
And the differential feed dog 13 is moved up and down. The main shaft 22 is also provided with a cloth feed amount adjusting device 25 for the main feed dog (this device is not the gist of the present invention, so a detailed explanation will be omitted). is fitted onto the outside, and the other end is pivotally attached to a feed crank 29 which is rotatably attached to the feed back and forth shaft 28, so that the crank 29 is oscillated in conjunction with the rotation of the main shaft 22, and the feed back and forth is rotated. A groove 30 is formed in the middle of the rod 27, and a square piece 31 that is pivoted on the main feed plate 12 is slidably fitted into the groove. Feed dog 1
1 can be moved back and forth. Although there are some structural differences between the above and the known ones, there is no reservation in using the known ones as is. An arc-shaped differential feed crank 33 that is integral with the feed crank 29 is also attached to the feed front and rear shaft 28.
Preferably, when the differential feed crank 33 that swings in the front-rear direction is located at the center of swing, the rod 34 pivotally attached to the differential feed base 14 and the differential feed crank 33 are slidably fitted at the center of curvature. The differential feed table 14 and the differential feed teeth 13 are connected to the mating slider 35 so that the differential feed table 14 and the differential feed teeth 13 are moved back and forth by the swinging of the differential feed crank 33. It is adjusted by moving along the differential feed crank 33 and changing its position. An adjustment mechanism is provided to move the slider 35 to change the differential feed amount, and this mechanism will now be described.
上部に送り前後軸２８の軸心を中心とする円弧
状の案内溝３７を形成した案内体３８（図には二
又状のものが示してあるが、長孔を形成したもの
であつてもよい）が送り前後軸２８に嵌合し、ス
ライダー３５に突設の軸３９により軸着される摺
動子４０が上記案内溝３７にスライド可能に嵌合
している。そして揺動中心に位置する差動送りク
ランク３３の曲率中心においてレバー軸４１によ
りフレームに軸支される調節レバー４２がその自
由端において案内体３８に軸着され、その軸支点
は好ましくは円弧軌跡を描いて揺動運動する軸３
９の揺動中心において軸３９の軸心と一致するよ
うにされる。これにより摺動子４０は常に軸支点
を中心として左右に同一量揺動するようになる。
レバー軸４１には更にフレームよりの突出端に操
作レバー４４を固着し、操作レバー４４は目盛板
４５に設けた円弧状の長孔４６を通してネジ止め
される調節ナツト４７により適当位置で固定され
うるようになつている。 A guide body 38 having an arcuate guide groove 37 centered on the axis of the forward and backward feed shaft 28 formed in the upper part (a bifurcated one is shown in the figure, but a one with an elongated hole may also be used). A slider 40, which is pivoted to the slider 35 by a protruding shaft 39, is slidably fitted into the guide groove 37. An adjustment lever 42, which is supported on the frame by a lever shaft 41 at the center of curvature of the differential feed crank 33 located at the center of swing, is pivoted at its free end to the guide body 38, and its pivot point preferably follows a circular arc. Axis 3 swings by drawing
The center of swing of the shaft 9 is made to coincide with the axis of the shaft 39. As a result, the slider 40 always swings left and right by the same amount around the pivot point.
An operating lever 44 is further fixed to the lever shaft 41 at its protruding end from the frame, and the operating lever 44 can be fixed at an appropriate position by an adjusting nut 47 screwed through an arc-shaped elongated hole 46 provided in a scale plate 45. It's becoming like that.
４８は操作レバー４４の回動量を規制するため
のストツパーで、上下一対設けられ、それぞれ円
弧状長孔４９内を移動できうるようにしてある。 Reference numeral 48 denotes a pair of stoppers for regulating the amount of rotation of the operating lever 44, which are provided in pairs at the upper and lower sides, and are movable within the circular arc-shaped elongated hole 49, respectively.
調節機構は以上のように構成され、差動送り量
の調整は調節ナツト４７を弛め操作レバー４４を
上下に操作して行う。これにより調節レバー４２
が上下に回動し、案内体３８を時計方向に回動さ
せながら押下げ（第３図）、或いは反時計方向に
回動させながら持上げて（第４図）スライダー３
５を差動送りクランク３３に沿つて上下動させる
ようになつている。 The adjustment mechanism is constructed as described above, and the differential feed amount is adjusted by loosening the adjustment nut 47 and operating the operating lever 44 up and down. This allows the adjustment lever 42
is rotated up and down, and the slider 3 is pushed down while rotating the guide body 38 clockwise (Fig. 3), or lifted while rotating counterclockwise (Fig. 4).
5 is moved up and down along a differential feed crank 33.
第５図は差動送り量を変えたときのスライダー
３５が実際に動く円弧軌跡と理想上の軌跡を表わ
したもので、図中ａは差動送りクランク３３の揺
動範囲をr1，r2，r3は送り前後軸２８の軸心ｃを
中心とするスライダー３５の理想上の軌跡をまた
R1，R2，R3は案内溝３７をスライドする摺動子
４０によつて実際に動く軌跡を示している。 FIG. 5 shows the actual arc trajectory and ideal trajectory of the slider 35 when changing the differential feed amount, and a in the figure represents the swing range of the differential feed crank 33 with r 1 , r 2 and r 3 cross the ideal trajectory of the slider 35 centered on the axis c of the forward and backward feed shaft 28.
R 1 , R 2 , and R 3 indicate trajectories actually moved by the slider 40 sliding in the guide groove 37.
ここでR1，R2，R3はそれぞれその曲率半径が
同一にしてある。なお、R1は最小送り時のR3は
最大送り時の軌跡をそれぞれ示す。 Here, R 1 , R 2 , and R 3 have the same radius of curvature. Note that R 1 represents the trajectory at the minimum feed, and R 3 represents the trajectory at the maximum feed.
同図からも明らかであるように円弧状案内溝３
７の曲率半径は最大送り量にしたときのR3の軌
跡の曲率半径と同一にするのが望ましい。送り量
を小さくするにつれ差動送りクランク３３の揺動
範囲が狭まり、狭い範囲内では両軌跡間のずれも
小さくなるからである。 As is clear from the figure, the arcuate guide groove 3
It is desirable that the radius of curvature of point 7 be the same as the radius of curvature of the trajectory of point R3 when the maximum feed amount is set. This is because as the feed amount is reduced, the swing range of the differential feed crank 33 becomes narrower, and within the narrow range, the deviation between the two trajectories also becomes smaller.
第６図はスライダーが適当位置にあるときの実
際と理想上の軌跡を拡大して示したものでa0は差
動送りクランク３３が中間位置にあるとき、すな
わち揺動範囲の中央を示している。スライダー３
５が実際に動く軌跡Ｒ及び理想上の軌跡ｒはとも
に法線が送り前後軸の軸心を通るためa0上の適当
位置ｂ点での理想上の円弧軌跡ｒは該点を通る実
際の円弧軌跡Ｒと一点でのみ接するようになり、
両軌跡は該点を通る法線と左右対称形をなす。し
たがつて両軌跡間のずれも左右同一となり、左右
両端の最大のずれも接点が軌跡の一方の側に片寄
つているよりも小さくなる。 Fig. 6 shows an enlarged view of the actual and ideal trajectories when the slider is at the appropriate position, and a0 indicates when the differential feed crank 33 is at the intermediate position, that is, the center of the swing range. There is. slider 3
The normal line of both the actual locus R and the ideal locus r of which 5 moves passes through the axis of the forward and backward feed axis, so the ideal circular arc locus r at an appropriate position b on a It now touches the arc locus R only at one point,
Both trajectories are symmetrical with respect to the normal line passing through the point. Therefore, the deviation between both trajectories is the same on the left and right sides, and the maximum deviation between the left and right ends is also smaller than if the contact points were offset to one side of the trajectory.
なお、上記実施例では摺動子４０は案内溝３７
に嵌合し、該溝内をスライドしうるようになつて
いるが、摺動子に突起を設けて一部を摺動可能に
嵌合させても、また逆に摺動子側に円弧溝を形成
して案内体の突起を該溝に係合させるようにして
もよい。 In addition, in the above embodiment, the slider 40 is connected to the guide groove 37.
However, even if a protrusion is provided on the slider and a part of the slider is fitted so that it can slide, there is also an arcuate groove on the slider side. may be formed so that the protrusion of the guide body engages with the groove.
本考案の送り装置では以上のようにスライダー
が実際に動く軌跡を円弧にし、かつ理想上の軌跡
と中央部で接するようにしたので両者間の最大ず
れ量がきわめて小さくなり、したがつてスライダ
ーの差動送りクランクに沿う動きが従来のものよ
りも一層小さくなり、スライダーと差動送りクラ
ンク間の摩耗が減少して耐久性にすぐれ、かつ振
動が小さくなつて差動送り歯の布送り作用への悪
影響を及ぼすことがなくなる。 As described above, in the feeding device of the present invention, the actual trajectory of the slider is made into a circular arc, and the ideal trajectory touches the ideal trajectory at the center, so the maximum amount of deviation between the two is extremely small. The movement along the differential feed crank is much smaller than the conventional one, reducing wear between the slider and the differential feed crank, resulting in excellent durability, and reducing vibration, allowing the differential feed dog to feed the cloth. will no longer have any negative effects.
第１Ａ，１Ｂ図は従来例の概略図、第２図は送
り装置の斜視図、第３，４図は側面図で送り量を
小さくしたときと大きくしたときをそれぞれ示す
図第５図は線図、第６図は一部を拡大した説明図
である。
１１……主送り歯、１２……主送り台、１３…
…差動送り歯、１４……差動送り台、２２……主
軸、２８……送り前後軸、２９……送りクラン
ク、３３……差動送りクランク、３４……ロツ
ド、３５……スライダー、３７……案内溝、３８
……案内体、４０……摺動子、４２……調節レバ
ー、４４……操作レバー。
Figures 1A and 1B are schematic diagrams of the conventional example, Figure 2 is a perspective view of the feed device, Figures 3 and 4 are side views showing when the feed amount is reduced and increased, respectively. Figure 5 is a line drawing. 6 are partially enlarged explanatory diagrams. 11...Main feed dog, 12...Main feed stand, 13...
... Differential feed dog, 14 ... Differential feed base, 22 ... Main shaft, 28 ... Front and rear feed axis, 29 ... Feed crank, 33 ... Differential feed crank, 34 ... Rod, 35 ... Slider, 37... Guide groove, 38
... Guide body, 40 ... Slider, 42 ... Adjustment lever, 44 ... Operation lever.
Claims (1)
設され、作動送り歯を備えた差動送り台と、主
軸に連動して上記両送り台を上下動させる上下
動機構と、主軸に連動して主送り台を前後動さ
せる第一の前後動機構と、主軸に連動して揺動
する円弧上の差動送りクランク、該クランクに
スライド可能に取着されるスライダー及び該ス
ライダーと差動送り台を連結するリンク機構よ
りなり、差動送り台を前後動させる第二の前後
動機構と、上記スライダーを差動送りクランク
に沿つて移動させる操作機構とを有するミシン
の送り装置において、上記操作機構は、送り前
後軸２８にスライドかつ回動可能に嵌合し、か
つスライダー３５に軸着される摺動子４０が送
り前後軸２８の軸心を通る径方向の線上に回転
中心を有する円弧運動を行いうるように係合す
る案内体３８と、前後方向に揺動する差動送り
クランク３３が揺動中心に位置するとき、その
曲率中心と一致する軸心の回りに手動操作部材
４４の操作によつて回動し、自由端部を上記案
内体に軸着した調節レバー４２とを有するミシ
ンの送り装置。 (2) 調節レバー４２と、案内体３８との軸着点は
揺動中心に位置する摺動子４０とスライダー３
５との軸着点と一致する登録請求の範囲第１項
記載のミシンの送り装置。 (3) 摺動子４０を案内体３８に円弧運動を行いう
るよう係合させるため円弧状案内溝３７が使用
される登録請求の範囲第１項記載のミシンの送
り装置。 (4) 円弧状案内溝３７はその曲率半径が最大送り
時におけるスライダー３５と送り前後軸２８間
の間隔と一致して形成される登録請求の範囲第
３項記載のミシンの送り装置。[Scope of Claim for Utility Model Registration] (1) A main feed base equipped with a main feed dog, a differential feed base installed in parallel with the feed base and equipped with an operating feed dog; A vertical movement mechanism that moves the table up and down, a first back and forth movement mechanism that moves the main feed table back and forth in conjunction with the main shaft, a differential feed crank on an arc that swings in conjunction with the main shaft, and a slide on the crank. a second back-and-forth movement mechanism that moves the differential feed back and forth, and a second back-and-forth movement mechanism that moves the differential feed back and forth, and a link mechanism that connects the slider and the differential feed base; In the feed device for a sewing machine, the operating mechanism is slidably and rotatably fitted to the feed back and forth shaft 28, and a slider 40 pivotally attached to the slider 35 is connected to the feed back and forth shaft 28. When the guide body 38, which engages to perform an arcuate motion with its center of rotation on a radial line passing through the axis, and the differential feed crank 33, which swings back and forth, are located at the center of swing, the curvature of the A feeding device for a sewing machine having an adjustment lever 42 which is rotated about an axis coincident with the center by the operation of a manual operation member 44 and whose free end is pivoted to the guide body. (2) The pivot point of the adjustment lever 42 and the guide body 38 is located between the slider 40 and the slider 3 located at the center of swing.
5. A feeding device for a sewing machine according to claim 1, which coincides with the shaft attachment point of the sewing machine. (3) A feeding device for a sewing machine according to claim 1, wherein an arcuate guide groove 37 is used to engage the slider 40 with the guide body 38 so as to perform an arcuate movement. (4) The feed device for a sewing machine according to claim 3, wherein the arcuate guide groove 37 is formed so that its radius of curvature matches the distance between the slider 35 and the forward and backward feed shaft 28 at maximum feed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2561484U JPS60137983U (en) | 1984-02-23 | 1984-02-23 | sewing machine feed device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2561484U JPS60137983U (en) | 1984-02-23 | 1984-02-23 | sewing machine feed device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60137983U JPS60137983U (en) | 1985-09-12 |
| JPS645586Y2 true JPS645586Y2 (en) | 1989-02-10 |
Family
ID=30520838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2561484U Granted JPS60137983U (en) | 1984-02-23 | 1984-02-23 | sewing machine feed device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60137983U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0728966B2 (en) * | 1986-04-10 | 1995-04-05 | ペガサスミシン製造株式会社 | Cylinder-bed sewing machine differential feed device |
| JPH07121313B2 (en) * | 1986-09-17 | 1995-12-25 | 株式会社鈴木製作所 | Sewing machine differential feed mechanism |
| JPH01296164A (en) * | 1988-05-24 | 1989-11-29 | Toshiba Corp | Automatic chemical analyzer |
-
1984
- 1984-02-23 JP JP2561484U patent/JPS60137983U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60137983U (en) | 1985-09-12 |
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