JPS6129424Y2 - - Google Patents
Info
- Publication number
- JPS6129424Y2 JPS6129424Y2 JP13453383U JP13453383U JPS6129424Y2 JP S6129424 Y2 JPS6129424 Y2 JP S6129424Y2 JP 13453383 U JP13453383 U JP 13453383U JP 13453383 U JP13453383 U JP 13453383U JP S6129424 Y2 JPS6129424 Y2 JP S6129424Y2
- Authority
- JP
- Japan
- Prior art keywords
- arm
- axis
- upper feed
- rocking body
- support
- 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
- 239000004744 fabric Substances 0.000 claims description 26
- 238000009958 sewing Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising 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、上送り歯に布送り四運動を行なわ
せるミシンの上送り装置に関し、特にその駆動を
円滑にするための改良に関する。[Detailed Description of the Invention] This invention relates to an upper feed device of a sewing machine in which an upper feed dog performs four cloth feeding movements, and particularly relates to an improvement for smoothing the drive thereof.
従来、この種の上送り揺動装置は、ミシン主軸
に連動して布送り方向に沿い揺動する布送り方向
との交叉軸線を中心に基端を回動可能とした上送
り腕の先端に上送り歯を固定し、中間部上面に巻
きバネにより下方への弾性力を受けるコロを圧接
し、このコロより先端側下面をミシン主軸に連動
して上下動する揺動機構に連結し、これにより上
送り腕を上下方向へ揺動するようにしていた。し
かし、このような従来の装置においては、上下揺
動機構の作動時にバネを伸縮しながら中間のコロ
が上下動するため、揺動運動にバネの作用力が常
に関与し、ミシンが高速で駆動するとバネが追従
できずに押圧力が不十分となつて、上送り歯によ
り布送り量が不十分となつて縫目が見苦しくなり
商品の品質を著しく低下する欠点を生じるととも
に、段部等の布厚部により上送り歯が持ち上げら
れると中間の揺動機構との連結部より上送り腕が
上方に離隔され、揺動が上送り歯に伝達されなく
なつて送りが不十分となり、また布厚部通過時に
上送り腕がバネの弾性力によりコロに衝突される
ため、振動、騒音が大きくなつて部品の摩耗、折
損の原因となる欠点を生じた。 Conventionally, this type of top feed swinging device has a top feed arm whose base end is rotatable around an axis that intersects with the cloth feed direction, and which swings along the cloth feed direction in conjunction with the main shaft of the sewing machine. The upper feed dog is fixed, and a roller that receives downward elastic force from a coiled spring is pressed against the upper surface of the intermediate portion, and the lower surface of the tip side of this roller is connected to a swing mechanism that moves up and down in conjunction with the main shaft of the sewing machine. This allows the upper feed arm to swing in the vertical direction. However, in such conventional devices, when the vertical swing mechanism is operated, the intermediate roller moves up and down while expanding and contracting the spring, so the force of the spring is always involved in the swing motion, causing the sewing machine to drive at high speed. In this case, the spring cannot follow the pressure and the pressing force is insufficient, and the upper feed dog does not feed the fabric enough, resulting in unsightly seams and a significant deterioration in product quality. When the upper feed dog is lifted by the thick part of the fabric, the upper feed arm is separated upward from the connecting part with the intermediate swing mechanism, and the swing is no longer transmitted to the upper feed dog, resulting in insufficient feed, and the fabric When passing through a thick section, the upper feed arm collides with the roller due to the elastic force of the spring, resulting in increased vibration and noise, resulting in defects that cause wear and breakage of parts.
この考案は、上記従来のものの欠点を除去する
ことを目的とする。 This invention aims to eliminate the drawbacks of the above-mentioned conventional ones.
この考案の実施例を説明すると、
ミシンの後方において、布送り方向との直交水
平軸線（第１図イ）をもつ支持軸（図示しない）
の中間部を機枠に対し軸受（図示しない）により
回動可能に支持し、その支持軸の一端に、軸線イ
に平行するピン１ａを有する作用体１を固定する
とともに、他端に保持体２を固定し、保持体２の
上端に垂直軸線を中心に回動可能に押え腕３を支
持する。押え腕３の先端には、後述する上送り歯
２３の歯部２３ａを嵌合する二列の溝孔４ａを形
成した押え足４を縫合部において送り歯（図示し
ない）上方に対向して周知のように布送り線との
交叉水平線を中心に回動可能に支持し、押え腕３
は常には押え足４を針板（図示しない）に圧接す
る弾性力を受ける。 To explain an embodiment of this invention, a support shaft (not shown) is installed at the rear of the sewing machine and has a horizontal axis line perpendicular to the cloth feeding direction (Fig. 1A).
The intermediate part of the is rotatably supported on the machine frame by a bearing (not shown), and an effecting body 1 having a pin 1a parallel to the axis A is fixed to one end of the support shaft, and a holding body is attached to the other end. 2 is fixed, and a presser arm 3 is supported at the upper end of the holder 2 so as to be rotatable about a vertical axis. At the tip of the presser arm 3, there is a presser foot 4 formed with two rows of slots 4a into which tooth portions 23a of an upper feed dog 23, which will be described later, are fitted. The presser arm 3 is supported rotatably around the horizontal line that intersects with the cloth feed line as shown in the figure.
is always subjected to an elastic force that presses the presser foot 4 against a throat plate (not shown).
支持軸を支持する軸受上に作用腕５，支持腕
６，連結腕７とを回動可能に支持する。 A working arm 5, a supporting arm 6, and a connecting arm 7 are rotatably supported on a bearing that supports a supporting shaft.
作用腕５には支持軸の軸線イを中心とする円弧
上の長孔８を基端に形成し、作用体１のピン１ａ
を長孔８に遊嵌する。作用腕５は基端の上部より
突出する突部９を連結腕７上方に対向し、その突
部９の一側縁を上方に折曲し布送り方向に略沿う
ねじ孔１０ａを形成して連結部１０とする。 The working arm 5 is formed with a long hole 8 in the shape of an arc centered on the axis A of the support shaft at the base end, and the pin 1a of the working body 1 is inserted into the working arm 5.
loosely fit into the long hole 8. The working arm 5 has a protrusion 9 protruding from the upper part of the base end facing above the connecting arm 7, and one side edge of the protrusion 9 is bent upward to form a screw hole 10a substantially along the cloth feeding direction. It is referred to as a connecting portion 10.
布送り方向に沿い機枠に回動可能に支持した支
軸１１に基端を固定した操作レバー１２は先端を
ペダル等の操作体（図示しない）に連結し、中間
部を連結棒１３を介して作用腕５の先端に連結す
る。機枠に固定した水平な支持板１４にねじ込み
調節可能としたねじ１５は、その先端を操作レバ
ー１２の初期位置を規定するように操作レバー上
端縁に係合可能とし、支軸１１に嵌装した巻きば
ね１６は操作レバー１２上端縁をねじ１５先端に
係合するように操作レバー１２を回動する弾性力
を付与する。 An operating lever 12 whose base end is fixed to a support shaft 11 rotatably supported on the machine frame along the cloth feeding direction has its tip connected to an operating body such as a pedal (not shown), and its intermediate part connected via a connecting rod 13. and is connected to the tip of the working arm 5. A screw 15 that can be adjusted by screwing into a horizontal support plate 14 fixed to the machine frame has its tip engaged with the upper edge of the operating lever so as to define the initial position of the operating lever 12, and is fitted onto the support shaft 11. The coiled spring 16 provides an elastic force that rotates the operating lever 12 so that the upper edge of the operating lever 12 engages with the tip of the screw 15.
連結腕７は、上方に突出して作用腕５の連結部
１０に対向しねじ孔１０ａに連通可能とする孔１
７ａを形成した連結部１７と、布送り方向手前に
突出し略Ｚ字状に折曲した作用部１８とを有す
る。第２図において、段つきねじ１９は先端縁を
外周方向に膨出して受部１９ａとし、先端軸部１
９ｂを連結腕７の孔１７ａに遊嵌し、軸部１９ｂ
よりも大径とした基端ねじ部１９ｃを作用腕５の
ねじ孔１０ａに螺合し、軸部１９ｂに巻きばね２
０を巻装して受部１９ａと連結部１７の両側端面
間に圧縮配置し、これによりねじ部１９ｃ端面と
巻きばね２０とにより連結部１７が挾持されて連
結腕７と作用腕５とは略一体に回動可能とする。 The connecting arm 7 has a hole 1 that projects upward, faces the connecting portion 10 of the working arm 5, and allows communication with the screw hole 10a.
It has a connecting part 17 formed with a shape 7a, and an action part 18 which protrudes toward the front in the cloth feeding direction and is bent into a substantially Z-shape. In FIG. 2, the stepped screw 19 has a distal end bulged in the outer circumferential direction to form a receiving portion 19a, and the distal end shaft portion 1
9b loosely fit into the hole 17a of the connecting arm 7, and
A proximal threaded portion 19c having a larger diameter than the one shown in FIG.
0 is wound and compressed between both end faces of the receiving part 19a and the connecting part 17, whereby the connecting part 17 is held between the end face of the threaded part 19c and the coiled spring 20, and the connecting arm 7 and the working arm 5 are separated. It can be rotated almost integrally.
上送り腕２１は、ミシン主軸に連動して布送り
方向との交叉軸線を中心に揺動する水平揺動腕２
２下端に対し布送り方向後端を回動可能に連結
し、先端に上送り歯２３を固定してその歯部２３
ａを押え足４の溝孔４ａに対向するように配置す
る。上送り腕２１の中間部の一側端面には、連結
腕７の作用部１８先端の上方に対向して係合可能
とするカム面の案内カム２１ａを形成する。この
案内カム２１ａは、水平揺動腕２２の全ての揺動
位置、即ち、上送り歯２１の水平方向全移動範囲
において、後述する連結腕７の回動による上送り
歯２，３の上昇を連結腕７の回動角に対して常に
一定量になるようにカム面を形成してある。 The upper feed arm 21 is a horizontal swing arm 2 that swings about an axis that intersects with the cloth feed direction in conjunction with the main shaft of the sewing machine.
2. The rear end in the cloth feeding direction is rotatably connected to the lower end, and the upper feed dog 23 is fixed to the tip.
a is placed so as to face the slot 4a of the presser foot 4. A guide cam 21a is formed on one side end surface of the intermediate portion of the upper feed arm 21, and is a cam surface that can be engaged with the upper end of the operating portion 18 of the connecting arm 7. This guide cam 21a prevents the upper feed teeth 2 and 3 from rising due to the rotation of the connecting arm 7, which will be described later, in all the swing positions of the horizontal swing arm 22, that is, in the entire horizontal movement range of the upper feed dog 21. The cam surface is formed so as to always have a constant amount with respect to the rotation angle of the connecting arm 7.
支持腕６は、上方に突出し布送り方向に略沿う
ねじ孔２４ａを形成した突部２４と、布送り方向
手前に突出し後述する上下揺動機構に連結した支
持部２５とを有し、ねじ孔２４ａに螺合して先端
を機枠に係合するねじ２６をねじ込み調節するこ
とにより支持腕６の回動位置を規定する。ねじ２
６先端に対向して機枠に固定した緩衝体２７は、
支持腕６の揺動時にねじ２６先端が機枠に衝突す
るのを緩衝するためのもので、ゴム等の材質によ
り形成する。 The support arm 6 has a protrusion 24 that protrudes upward and has a screw hole 24a substantially along the cloth feeding direction, and a support portion 25 that protrudes toward the front in the cloth feed direction and is connected to a vertical swing mechanism to be described later. The rotational position of the support arm 6 is defined by adjusting the screw 26 which is screwed into the support arm 24a and whose tip engages with the machine frame. screw 2
6. The buffer body 27 fixed to the machine frame facing the tip is
This is to cushion the tip of the screw 26 from colliding with the machine frame when the support arm 6 swings, and is made of a material such as rubber.
支持腕６の支持部２５先端に布送り方向との交
叉軸線を中心に回動可能に連結した揺動体２８
は、その回動軸線よりも下方において揺動リンク
（連結手段）２９の先端に前記回動軸線との平行
軸線を中心に回動可能に連結し、前記回動軸線よ
りも布送り方向手前の離隔位置において、保持部
材としての駒３０を回動軸線との平行軸線を中心
に回動可能に支持する。揺動リンク２９は基端を
ミシン主軸に連動して揺動するメス駆動軸５０に
リンク５１を介して連結し、第２図矢印方向Ａに
沿い揺動し、駒３０は上送り腕２１の中間部の上
下端面を挾んで摺動可能に嵌合するように縦断面
略コ字状とする。この揺動体２８，揺動リンク２
９，駒３０により上下揺動機構を構成する。 A rocking body 28 is rotatably connected to the tip of the support portion 25 of the support arm 6 about an axis intersecting the cloth feeding direction.
is connected to the tip of the swing link (connection means) 29 below the rotation axis so as to be rotatable about an axis parallel to the rotation axis, and is located before the rotation axis in the cloth feeding direction. At the remote position, a piece 30 serving as a holding member is supported so as to be rotatable about an axis parallel to the rotation axis. The swing link 29 has its base end connected via a link 51 to a knife drive shaft 50 that swings in conjunction with the main shaft of the sewing machine, and swings along the arrow direction A in FIG. The vertical section is approximately U-shaped so that the upper and lower end surfaces of the intermediate portion are sandwiched and slidably fitted. This swinging body 28, swinging link 2
9, the piece 30 constitutes a vertical swing mechanism.
３１は機枠に固定し上送り腕２１先端の両側端
面を挾んで摺動可能に嵌合する二又状の案内体で
ある。３２は支持腕６の支持部２５先端の上部に
係合し下方への弾性力を調節可能に付与する調節
手段であり、調節手段３２と支持部２５との係合
部にはゴム等の緩衝体３３を配置して支持部２５
に固定する。 Reference numeral 31 denotes a forked guide body fixed to the machine frame and slidably fitted between both end surfaces of the tip of the upper feed arm 21. Reference numeral 32 denotes an adjustment means that engages with the upper part of the tip of the support part 25 of the support arm 6 and adjustably applies downward elastic force. The body 33 is arranged and the support part 25
Fixed to.
また図示していないが、リンク５１はメス駆動
軸５０に対する連結孔を長孔にすることにより連
結位置を調節して揺動ストロークを調節可能とす
る構成になつている。 Although not shown, the link 51 has a structure in which the connecting hole for the knife drive shaft 50 is made into an elongated hole so that the connecting position can be adjusted and the swing stroke can be adjusted.
この考案は以上のような構成であり、次にその
作用について説明する。 This invention has the above structure, and its operation will be explained next.
揺動機構において、揺動腕２２が上端を中心に
揺動することにより上送り腕２１は水平方向に揺
動され、揺動リンク２９が矢印Ａに沿い揺動する
ことにより、揺動体２８が支持腕６の支持部２５
との連結点を中心に揺動し、揺動体２８に支持さ
れる駒３０は上下方向に揺動されて上送り腕２１
に伝達する。これにより上送り腕２１は上下、水
平方向の合成による送り四運動を行なう。押え足
４と針板との間に段部等の布厚部が移動して上送
り歯２３が持ち上げられるが、上送り腕２３を嵌
合した駒３０を保持する揺動体２８は支持腕２３
を嵌合した駒３０を保持する揺動体２８は支持腕
６の支持部２５に回動可能に支持されているの
で、支持腕６が支持軸の軸線イを中心に調節手段
３２の弾性力に抗して反時計方向（第１図）へ回
動してその持ち上げる作用力を吸収している。布
厚部の通過による支持腕６の復帰時に、支持腕６
に螺合するねじ２６の先端と機枠及び調節手段３
２と支持部２５が衝突するがそれぞれの間に緩衝
体２７，３３があるので振動，音を防止する。 In the swing mechanism, the swing arm 22 swings around its upper end, thereby swinging the upper feed arm 21 in the horizontal direction, and the swing link 29 swings along arrow A, causing the swing body 28 to swing. Support part 25 of support arm 6
The piece 30, which is supported by the swinging body 28 and swings around the connection point with the top feed arm 21, swings in the vertical direction.
to communicate. As a result, the upper feed arm 21 performs four feed movements by combining vertical and horizontal directions. A thick part of the fabric such as a stepped part moves between the presser foot 4 and the throat plate, and the upper feed dog 23 is lifted up.
Since the rocking body 28 holding the piece 30 fitted with the piece 30 is rotatably supported by the support part 25 of the support arm 6, the support arm 6 is rotated by the elastic force of the adjustment means 32 about the axis A of the support shaft. It rotates counterclockwise (Fig. 1) against the resistance and absorbs the lifting force. When the support arm 6 returns by passing through the thick part of the cloth, the support arm 6
The tip of the screw 26 screwed into the machine frame and the adjusting means 3
2 collides with the support part 25, but since there are buffer bodies 27 and 33 between them, vibration and noise are prevented.
支持軸は押え足４を針板に圧接するように押え
腕３に作用する弾性力により第１図時計方向へ回
転力が付与されており、また、支持腕６の支持部
２５先端に押圧する調節手段３２の弾性力により
支持腕６に係合する上送り腕２１を介して上送り
歯２３の歯部２３ａを針板に圧接している。 The support shaft is given a rotational force in the clockwise direction in FIG. 1 by the elastic force acting on the presser arm 3 so as to press the presser foot 4 against the throat plate, and is also pressed against the tip of the support portion 25 of the support arm 6. Due to the elastic force of the adjusting means 32, the tooth portion 23a of the upper feed dog 23 is pressed against the throat plate via the upper feed arm 21 that engages with the support arm 6.
また段ねじ１９のばね２０が受部１９ａと連結
部１７との間に圧縮されているので、連結腕７は
第２図時計方向への弾性力を受けて作用部１８が
案内カム２１ａのカム面から常には非係合となつ
ている。 Further, since the spring 20 of the step screw 19 is compressed between the receiving part 19a and the connecting part 17, the connecting arm 7 receives an elastic force in the clockwise direction in FIG. It is always disengaged from the surface.
押え足４が針板に圧接し且つ上送り歯２３が下
降するときには、支持軸及び作用腕５はピン１ａ
が長孔８の中間に位置する初期位置（第４図）と
なり、このときのピン１ａの位置は長孔８の第４
図右端までの距離（△ｔ）が押え足４上端面より
上送り歯２３の歯部２３ａ下端面が上昇するのに
要する上送り腕２１の上昇量に対応して設定して
あり、操作レバー１２を規制するねじ１５を進退
させることにより操作レバー１２介して作用腕５
を回動させるので、初期位置におけるピン１ａと
長孔８の前記右端との間隔を調節可能とする。 When the presser foot 4 is in pressure contact with the throat plate and the upper feed dog 23 is lowered, the support shaft and the working arm 5 are connected to the pin 1a.
is the initial position located in the middle of the long hole 8 (Fig. 4), and the position of the pin 1a at this time is the fourth position of the long hole 8.
The distance (Δt) to the right end of the figure is set corresponding to the amount of rise of the upper feed arm 21 required for the lower end surface of the tooth portion 23a of the upper feed dog 23 to rise from the upper end surface of the presser foot 4, and the operating lever By moving forward and backward the screw 15 that regulates the operating arm 5
Since the pin 1a is rotated, the distance between the pin 1a and the right end of the elongated hole 8 at the initial position can be adjusted.
ペダル等の操作体を押下操作して操作レバー１
２をばね１６に抗して回動すると、作用腕５は支
持軸の軸線イを中心に反時計方向（第１図）へ回
動し、連結部１０，１７において連結状態にある
連結腕７は略同時に回動し、案内カム２１ａに係
合する作用部１８が上送り腕２１を押し上げる。
上送り腕２１は揺動腕２２との連結軸線を中心に
先端を上昇するように回動し、先端の上送り歯２
３の歯２３ａを針板上方へ上昇する。作用腕５の
回動初期には支持軸は作用力が伝達されていない
ので静止している。作用腕５の回動により長孔８
の第４図右端がピン１ａに接近し、上送り歯２３
の歯部２３ａの下端面が押え足４の上端面よりも
上昇するとき（第８図）、長孔８の前記右端面に
ピン１ａが係合し（第５図）、それから作用体１
（支持軸）は作用腕５に連結状態となつて一体に
回動し、押え腕３は支持軸とともに回動して押え
足４を針板から上昇させる（第６，９図）。連結
体７の作用部１８が係合する案内カム２１ａのカ
ム形状により、揺動腕２２の揺動位置の変化にか
かわらず連結腕７の初期回動時における上送り歯
２３の上昇量を一定にしている。 Press down the operating body such as a pedal to release operating lever 1.
2 is rotated against the spring 16, the working arm 5 is rotated counterclockwise (FIG. 1) about the axis A of the support shaft, and the connecting arm 7, which is in a connected state at the connecting parts 10 and 17, rotate substantially simultaneously, and the operating portion 18 that engages with the guide cam 21a pushes up the upper feed arm 21.
The upper feed arm 21 rotates around the axis of connection with the swing arm 22 so that the tip thereof rises, and the upper feed tooth 2 at the tip rotates.
Raise the No. 3 tooth 23a above the throat plate. At the beginning of rotation of the working arm 5, the support shaft is stationary because no acting force is transmitted thereto. The long hole 8 is opened by rotating the working arm 5.
The right end of FIG. 4 approaches the pin 1a, and the upper feed dog 23
When the lower end surface of the toothed portion 23a rises higher than the upper end surface of the presser foot 4 (FIG. 8), the pin 1a engages with the right end surface of the elongated hole 8 (FIG. 5), and then the operating body 1
(Support shaft) is connected to the working arm 5 and rotates together, and the presser arm 3 rotates together with the support shaft to raise the presser foot 4 from the throat plate (FIGS. 6 and 9). Due to the cam shape of the guide cam 21a with which the action portion 18 of the connecting body 7 engages, the amount of rise of the upper feed dog 23 during the initial rotation of the connecting arm 7 is kept constant regardless of changes in the swinging position of the swinging arm 22. I have to.
以上のようにこの考案によれば、
上送り腕の回動軸線よりも布送り方向先方にお
いてそれに平行する一固定軸線を中心に回動可能
に基端を支持し布送り方向手前へ突出する支持部
を設けた支持腕６と、支持腕先端に対し上送り腕
の回動軸線との平行軸線を中心に回動可能に支持
した揺動体２８と、揺動体の回動軸線より布送り
方向に離隔するそれとの平行軸線を中心に回動可
能に揺動体に支持し上送り腕の中間部を布送り方
向へ摺動可能に保持する保持部材３０と、ミシン
主軸に連動し駒の回動軸線を上下方向へ揺動する
ように揺動体の回動軸線との平行軸線を中心に回
動可能に揺動体に連結した連結手段２９、とを設
けたことにより、上送り腕の上下方向、水平方向
の揺動運動を生じるために前記従来のようなバネ
が作用していないので、ミシンを高速で駆動して
も常に確実に上送り歯が四運動できるから、布送
り量を正確にして縫目を綺麗にし商品の品質を向
上するとともに、揺動体の一軸線を中心とした揺
動運動と、駒に対する上送り腕の摺動運動とによ
り円滑に駆動されるから、振動，騒音を防止し装
置の寿命を長くする等の効果が得られる。なお本
実施例の駒３０に代えて上送り腕２１を腕長手方
向へ摺動可能に嵌合する筒状の保持部材を揺動体
に回動可能に支持してもよい。 As described above, according to this invention, the base end is supported rotatably about a fixed axis parallel to the rotation axis of the upper feed arm in the cloth feed direction, and the support protrudes toward the front in the cloth feed direction. a support arm 6 provided with a support arm 6; a rocking body 28 supported rotatably about an axis parallel to the rotation axis of the upper feed arm with respect to the tip of the support arm; A holding member 30 that is supported on a swinging body so as to be rotatable about an axis parallel to the upper feed arm and that holds the middle part of the upper feed arm so as to be slidable in the cloth feeding direction; By providing a connecting means 29 rotatably connected to the rocking body about an axis parallel to the rotation axis of the rocking body so as to swing in the vertical direction, the upper feed arm can be moved in the vertical direction and horizontal direction. Since there is no spring acting to generate the oscillating motion, the upper feed dog can always move reliably even when the sewing machine is operated at high speed. In addition to improving the quality of the product by keeping it clean, the swinging motion of the swinging body around one axis and the sliding motion of the upper feed arm relative to the piece drive the piece smoothly, preventing vibration and noise. Effects such as lengthening the life of the product can be obtained. Note that instead of the piece 30 of this embodiment, a cylindrical holding member that fits the upper feed arm 21 so as to be slidable in the longitudinal direction of the arm may be rotatably supported by the rocking body.
第１図は本実施例の上送り装置と昇降装置の斜
視図、第２図は上送り装置の上送り腕上昇機構の
正面図、第３図は上送り装置の揺動機構の正面説
明図、第４〜６図は作用腕と支持軸の連結状態を
説明する説明図、第７〜９図は第４〜６図に対応
した上送り腕上昇機構の説明図である。
Fig. 1 is a perspective view of the upper feed device and lifting device of this embodiment, Fig. 2 is a front view of the upper feed arm lifting mechanism of the upper feed device, and Fig. 3 is a front explanatory view of the swing mechanism of the upper feed device. , FIGS. 4 to 6 are explanatory diagrams for explaining the connection state of the working arm and the support shaft, and FIGS. 7 to 9 are explanatory diagrams of the upper feed arm lifting mechanism corresponding to FIGS. 4 to 6.
Claims (1)
歯を固定し、基端をミシン主軸に連動して布送り
方向に沿い揺動する布送り方向との交叉軸線を中
心に回動可能とした上送り腕２１と、 上送り腕の回動軸線よりも布送り方向先方にお
いてそれに平行する一固定軸線を中心に回動可能
に基端を支持し布送り方向手前へ突出する支持部
を設けた支持腕６と、 支持腕先端に対し上送り腕の回動軸線との平行
軸線を中心に回動可能に支持した揺動体２８と、 揺動体の回動軸線より布送り方向に離隔するそ
れとの平行軸線を中心に回動可能に揺動体に支持
し上送り腕の中間部を布送り方向へ摺動可能に保
持する保持部材３０と、 ミシン主軸に連動し保持部材の回動軸線を上下
方向へ揺動するように揺動体の回動軸線との平行
軸線を中心に回動可能に揺動体に連結した連結手
段２９、 とを備えたミシンの上送り装置。[Claim for Utility Model Registration] An upper feed dog is fixed at the tip facing the throat plate in close proximity to the presser foot, and the base end is linked to the sewing machine main shaft and swings along the fabric feed direction. The upper feed arm 21 is rotatable around a cross axis, and the base end is supported to be rotatable around a fixed axis parallel to the rotation axis of the upper feed arm in the cloth feed direction. A support arm 6 provided with a support portion projecting forward in the direction; a rocking body 28 supported rotatably about an axis parallel to the rotation axis of the upward feed arm relative to the tip of the support arm; and rotation of the rocking body. A holding member 30 that is rotatably supported on a rocking body about an axis parallel to the axis that is spaced apart from the axis in the fabric feeding direction, and that holds the middle part of the upper feeding arm so as to be slidable in the fabric feeding direction; and a connecting means 29 connected to the rocking body so as to be rotatable about an axis parallel to the rotation axis of the rocking body so as to swing the rotation axis of the holding member in the vertical direction. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13453383U JPS6044771U (en) | 1983-08-31 | 1983-08-31 | Upper feed device of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13453383U JPS6044771U (en) | 1983-08-31 | 1983-08-31 | Upper feed device of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6044771U JPS6044771U (en) | 1985-03-29 |
| JPS6129424Y2 true JPS6129424Y2 (en) | 1986-08-30 |
Family
ID=30303108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13453383U Granted JPS6044771U (en) | 1983-08-31 | 1983-08-31 | Upper feed device of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6044771U (en) |
-
1983
- 1983-08-31 JP JP13453383U patent/JPS6044771U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6044771U (en) | 1985-03-29 |
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