JPS6116477B2 - - Google Patents
Info
- Publication number
- JPS6116477B2 JPS6116477B2 JP15978883A JP15978883A JPS6116477B2 JP S6116477 B2 JPS6116477 B2 JP S6116477B2 JP 15978883 A JP15978883 A JP 15978883A JP 15978883 A JP15978883 A JP 15978883A JP S6116477 B2 JPS6116477 B2 JP S6116477B2
- Authority
- JP
- Japan
- Prior art keywords
- arm
- upper feed
- presser foot
- presser
- tip
- 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 23
- 238000009958 sewing Methods 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000035939 shock Effects 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009964 serging Methods 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【発明の詳細な説明】
この発明は、ミシン縫合部において針板上面に
圧接する押え足と、押え足に近接する針板上にお
いてミシン主軸に連動して布送り四運動を行なう
上送り歯とを有し、手動操作に関連して押え足と
上送り歯とを針板上方へ離隔保持する上送りミシ
ンの押え上げ装置に関する。Detailed Description of the Invention This invention provides a presser foot that presses against the upper surface of the throat plate in the sewing section of the sewing machine, and an upper feed dog that performs four cloth feed movements in conjunction with the main shaft of the sewing machine on the throat plate adjacent to the presser foot. The present invention relates to a presser foot lifting device for an upper feed sewing machine, which maintains a presser foot and an upper feed dog apart from each other above a throat plate in connection with manual operation.
従来、この種の上送りミシンの押え上げ装置と
してはペダル等の押し下げ操作に関連して上送り
歯を先端に保持した上送り腕と押え足を先端に保
持した押え腕とを同時に回動して上送り歯と押え
足を等しく一定量上昇させるようにしたものが知
られており、これによれば、押え足下面から上送
り歯下面が下方へ突出した状態で上昇し、布の出
し入れ時にこの突出する上送り歯下面が引掛つて
作業が面倒となるとともに、通常、縁かがりミシ
ンにおいては布押え足を支持した押え腕は垂直軸
線を中心に回動可能に機枠に支持してミシン縫合
部から押え足を側方に逃がす機構をもつている
が、前記したように押え上げ時に上送り歯と押え
足の上昇量が等しいために、押え上げ状態で押え
腕を水平方向へ回動させるためには押え腕のみを
押し下げて押え足が上送り歯に係合しないように
してから回動しなければならず作業が煩雑とな
り、作業能率を著しく低下する欠点を生じた。 Conventionally, the presser foot lifting device for this type of top feed sewing machine has been designed to simultaneously rotate the top feed arm, which holds the top feed dog at its tip, and the presser foot, which holds the presser foot at its tip, in conjunction with the depressing operation of a pedal, etc. There is a known device in which the upper feed dog and the presser foot are raised equally by a certain amount. According to this, the lower surface of the upper feed dog rises with the lower surface protruding downward from the lower surface of the presser foot, and when loading and unloading cloth, This protruding lower surface of the upper feed dog gets caught and makes the work cumbersome.In addition, in overlocking sewing machines, the presser foot that supports the presser foot is normally supported on the machine frame so that it can rotate around a vertical axis, and the sewing machine is sewn. The machine has a mechanism to release the presser foot laterally from the presser foot, but as mentioned above, when lifting the presser foot, the amount of rise of the upper feed dog and the presser foot is equal, so the presser foot is rotated horizontally when the presser foot is raised. In order to do this, it is necessary to push down only the presser foot to prevent the presser foot from engaging with the upper feed dog before rotating, which makes the work complicated and has the drawback of significantly reducing work efficiency.
この発明は、上記従来のものの欠点を除くこと
を目的とする。 The purpose of this invention is to eliminate the drawbacks of the above-mentioned conventional devices.
この発明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 the present invention, a support shaft (not shown) having a horizontal axis perpendicular to the cloth feeding direction (FIG. 1A) is installed at the rear of the sewing machine.
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に対応しねじ孔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 and corresponds to 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、上送り腕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23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 dog 23 from rising due to the rotation of the connecting arm 7, which will be described later, in all the swinging positions of the horizontal swinging arm 22, that is, in the entire horizontal movement range of the upper feed arm 21. The cam surface is formed so that it always has a constant amount with respect to the rotation angle of 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 pieces 30 constitute 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 designates a bifurcated guide body fixed to the machine frame and slidably fitted onto both side 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.
この発明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。 The present 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32と支
持部25が衝突するがそれぞれの間に緩衝体2
7,33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 step moves between the presser foot 4 and the throat plate, and the upper feed dog 23 is lifted up. Since the support arm 6 is rotatably supported by the support portion 25 of the support shaft 6, the support arm 6 can be rotated counterclockwise (FIG. 1) against the elastic force of the adjustment means 32 around the axis A of the support shaft. It absorbs that lifting force. When the support arm 6 returns after passing through the thick part of the fabric, the tip of the screw 26 that is screwed into the support arm 6 collides with the machine frame, the adjustment means 32, and the support part 25, but there is a shock absorber 2 between them.
7,33 prevents vibration and noise.
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を介して作用腕
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 (△t) 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 The operating arm 5 is rotated via the operating lever 12 by advancing and retracting the screw 15 that restricts the pin 12, so that the pin 1a is at the initial position.
and the right end of the elongated hole 8 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.
なお、本実施例の揺動機構に代えて第二の実施
例として第10,11図に示したような機構にし
てもよい。即ち、33はミシン機枠、34は機枠
33に対し上下方向へ摺動可能且つ回動不能に支
持し上端に径方向外方へ膨出した段部34a、下
端に略軸心を通る線上に切欠いた支持平面34b
を形成した筒状の保持体、35は下端に保持体3
4上端に遊嵌する軸部35a、上端にねじ部35
bを形成した調節軸、36は基端を機枠33に固
定し先端を調節軸35のねじ部35bに螺合した
受台、37は受台36上方に固定しねじ部35b
に螺合したナツト、38は保持体34の段部34
aと機枠33の間に配置した緩衝体である。39
は保持体34の略軸心上において布送り方向との
交叉軸線をもち支持平面34bに固定した支軸、
40は支軸39を中心に上端を回動可能に支持し
下端を揺動リンク29に回動可能に連結した揺動
体である。41,42は支軸39の軸線を挾んで
布送り方向に離隔して配置し、揺動体40に対し
て支軸39との平行軸線を中心に回動可能に支持
し、上送り腕21上端面に係合可能としたローラ
ー、43は保持体34の略軸線上において揺動体
40に対して支軸39との平行軸線を中心に回動
可能に支持し、ローラー41,42との間に上送
り腕21を挾んでその下面に係合可能としたロー
ラーである。 Note that, in place of the swinging mechanism of this embodiment, a mechanism as shown in FIGS. 10 and 11 may be used as a second embodiment. That is, 33 is a sewing machine frame, 34 is a stepped portion 34a which is slidably supported in the vertical direction but not rotatable with respect to the machine frame 33, and which bulges outward in the radial direction at the upper end, and a step portion 34a at the lower end that is approximately on a line passing through the axis. Support plane 34b cut out in
35 is a cylindrical holding body formed with a holding body 3 at the lower end.
4. A shaft portion 35a that loosely fits on the upper end, and a threaded portion 35 on the upper end.
36 is a pedestal whose base end is fixed to the machine frame 33 and the tip is screwed into the threaded part 35b of the adjustment shaft 35; 37 is fixed above the pedestal 36 and has the threaded part 35b;
The nut 38 is screwed into the stepped portion 34 of the holding body 34.
This is a shock absorber placed between a and the machine frame 33. 39
is a support shaft fixed to the support plane 34b and having an axis substantially on the axis of the holder 34 and intersecting with the cloth feeding direction;
Reference numeral 40 denotes a rocking body whose upper end is rotatably supported around the support shaft 39 and whose lower end is rotatably connected to the rocking link 29. 41 and 42 are arranged to sandwich the axis of the support shaft 39 and are spaced apart in the cloth feeding direction, and support the swinging body 40 so as to be rotatable about an axis parallel to the support shaft 39. A roller 43 that can be engaged with the end face is supported substantially on the axis of the holding body 34 so as to be rotatable with respect to the rocking body 40 about an axis parallel to the support shaft 39, and there is a roller 43 between the rollers 41 and 42. This roller is capable of holding the upper feed arm 21 and engaging with its lower surface.
44は保持体34内方において調節軸35下端
と緩衝体45を介して揺動体40上端との間に圧
縮配置した巻きばねである。なおこの実施例の機
構では支持腕6は不要となる。 Reference numeral 44 denotes a coiled spring compressed and disposed inside the holder 34 between the lower end of the adjustment shaft 35 and the upper end of the swinging body 40 via the buffer 45. Note that the support arm 6 is not required in the mechanism of this embodiment.
このような構成において、揺動腕22の揺動に
より上送り腕21はローラー41,42,43に
案内されて水平方向へ揺動するとともに、揺動リ
ンク29の揺動により揺動体40が支軸39を中
心に揺動し、ローラー41,42,43により挾
まれる上送り腕21は上下方向への揺動を生じ、
これにより上送り腕21先端の上送り歯23は送
り四運動を行なう。布厚部が上送り歯23の歯部
23aに移動すると上送り歯23が持ち上げられ
るが、上送り腕21に係合するローラー41,4
2を介して揺動体40がばね44に抗して保持体
34を押し上げ、上送り腕21の回動を許容す
る。布厚部が通過して上送り腕21が復帰すると
き保持体34と機枠33との間及びばね44と揺
動体40との間の衝撃を緩衝体38,45により
緩衝し、振動、騒音を防止する。また押え上げ時
には前記本実施例の揺動機構と同様に、案内カム
21aに係合する連結腕7の作用部18により押
え腕3(押え足4)に先行して上送り腕21(上
送り歯23)が一定量上昇する。 In such a configuration, the upper feed arm 21 is guided by the rollers 41, 42, and 43 and swings in the horizontal direction by the swing of the swing arm 22, and the swing body 40 is supported by the swing of the swing link 29. The upper feed arm 21, which swings around a shaft 39 and is held between rollers 41, 42, and 43, swings in the vertical direction.
As a result, the upper feed dog 23 at the tip of the upper feed arm 21 performs four feed movements. When the thick portion of the cloth moves to the tooth portion 23a of the upper feed dog 23, the upper feed dog 23 is lifted, but the rollers 41, 4 that engage with the upper feed arm 21
2, the rocking body 40 pushes up the holding body 34 against the spring 44, allowing the upper feed arm 21 to rotate. When the upper feed arm 21 returns after the thick part of the cloth passes through, the shock between the holding body 34 and the machine frame 33 and between the spring 44 and the rocking body 40 is buffered by the shock absorbers 38 and 45, thereby reducing vibration and noise. prevent. Further, when lifting the presser foot, similarly to the swinging mechanism of the present embodiment, the upper feed arm 21 (upper feed tooth 23) rises by a certain amount.
また、第二実施例に代えて第12図に示す第三
の実施例の揺動機構に実施してもよい。即ち、前
記保持体34の下端の支持平面34bを下方へ延
長し、その下端にL字形の連結リンク47の中間
部を回動可能に連結し、保持体34には上送り腕
21上端面に係合可能にローラー4bを布送り方
向との交叉軸線を中心に回動可能に支持する。ま
た揺動リンク29の先端を連結リンク47の下方
端に回動可能に連結し、連結リンク47の上方端
に上送り腕21に嵌合した駒30(本実施例と同
様の構成)を回動可能に支持する。 Moreover, the swing mechanism of the third embodiment shown in FIG. 12 may be used instead of the second embodiment. That is, the supporting plane 34b at the lower end of the holding body 34 is extended downward, and the middle part of the L-shaped connecting link 47 is rotatably connected to the lower end. The roller 4b is engageably supported so as to be rotatable about an axis that intersects with the cloth feeding direction. Further, the tip of the swing link 29 is rotatably connected to the lower end of the connecting link 47, and a piece 30 (configuration similar to this embodiment) fitted to the upper feed arm 21 is rotatably connected to the upper end of the connecting link 47. Support movably.
このような構成において、揺動腕22の揺動に
よる上送り腕21の水平揺動は駒30により許容
され、揺動リンク29の揺動により連結リンク4
7を介して駒30が上下揺動して上送り腕21に
上下方向への揺動を生じ、前記と同様に上送り歯
23は送り四運動を行なう。布厚部の上送り歯2
3の歯部23aへの移動により上送り歯23が押
し上げられると、ローラー46を介して保持体3
4をばね44に抗して押し上げ、これにともなつ
て上送り腕21の上昇を許容する。 In such a configuration, the horizontal swinging of the upper feed arm 21 due to the swinging of the swinging arm 22 is allowed by the piece 30, and the swinging of the swinging link 29 causes the connecting link 4 to move horizontally.
7, the piece 30 swings up and down, causing the upper feed arm 21 to swing in the vertical direction, and the upper feed dog 23 performs four feed movements in the same manner as described above. Upper feed dog 2 of thick cloth part
When the upper feed dog 23 is pushed up by the movement toward the tooth portion 23a of No. 3, the holding body 3
4 is pushed up against the spring 44, thereby allowing the upper feed arm 21 to rise.
また押え上げ時には前記と同様に、案内カム2
1aに係合する連結腕7の作用部18により押え
腕3(押え足4)に先行して上送り腕21(上送
り歯23)が一定量上昇する。 Also, when lifting the presser foot, the guide cam 2
The upper feed arm 21 (upper feed dog 23) is raised by a certain amount in advance of the presser arm 3 (presser foot 4) by the action portion 18 of the connecting arm 7 that engages with the upper feed arm 1a.
また本実施例においては、支持軸の中間部を回
動可能に遊嵌する軸受に支持腕6、連結腕7を支
持し支持軸の両端に作用腕5と保持体2を固定し
たものを示したが、作用腕5、保持体2を支持軸
両端に固定し支持腕6、連結腕7を支持軸に回動
可能に直接支持してもよい。 Further, in this embodiment, the support arm 6 and the connecting arm 7 are supported on a bearing that is rotatably fitted loosely in the middle part of the support shaft, and the working arm 5 and the holder 2 are fixed to both ends of the support shaft. However, the working arm 5 and the holder 2 may be fixed to both ends of the support shaft, and the support arm 6 and the connecting arm 7 may be rotatably supported directly on the support shaft.
また本実施例においては、支持軸の軸線イ上に
作用腕5、支持腕6、連結腕7、押え腕3を支持
する保持体2、をともに支持したが、支持腕6、
連結腕7を支持軸の平行軸線をもつ別の軸上に回
動可能に支持し、作用腕5に連動して、回動する
ように関連してもよい。 Further, in this embodiment, the working arm 5, the supporting arm 6, the connecting arm 7, and the holding body 2 that supports the presser arm 3 are all supported on the axis A of the supporting shaft, but the supporting arm 6,
The connecting arm 7 may be rotatably supported on another axis having an axis parallel to the support shaft, and may be connected to rotate in conjunction with the working arm 5.
また本実施例においては、上送り腕21に案内
カム21aを形成し、連結腕7の作用部18先端
を係合するようにしたが、作用部18先端に案内
カム21aに係合するコロを回動可能に支持して
もよく、また作用部18先端の上面を案内カムと
同様の効果を生じるカム形状とし、上送り腕21
の係合部にコロやピンを配置するようにしてもよ
い。 Further, in this embodiment, the guide cam 21a is formed on the upper feed arm 21 so as to engage the tip of the acting portion 18 of the connecting arm 7, but the tip of the acting portion 18 is provided with a roller that engages with the guide cam 21a. The upper feed arm 21 may be rotatably supported, and the upper surface of the tip of the operating portion 18 may be shaped like a cam that produces the same effect as a guide cam.
A roller or a pin may be arranged at the engaging portion of the holder.
さらにまた本実施例では支持軸に作用体1を固
定して作用体1のピン1aと作用腕5の長孔8と
を嵌合状態にしたものを示したが、作用腕5を保
持体2に隣接して支持軸に遊嵌し、保持体2より
軸線方向へ突出するピンを設けてこのピンを作用
腕5の長孔8に嵌入するようにしてもよく、また
作用体1または保持体2に長孔を形成し作用腕5
にピンを形成して本実施例と同様の効果を生じる
ように嵌合配置してもよい。 Furthermore, in this embodiment, the working body 1 is fixed to the support shaft and the pin 1a of the working body 1 and the elongated hole 8 of the working arm 5 are fitted into each other. A pin may be provided adjacent to the support shaft and protrude from the holder 2 in the axial direction, and this pin may be fitted into the elongated hole 8 of the working arm 5. A long hole is formed in 2 and the working arm 5
It is also possible to form pins on the parts and arrange them so as to produce the same effect as in this embodiment.
また本実施例では、連結腕7の作用部18が上
送り腕21に係合して、上送り腕21を介し、支
持腕6を支持軸の軸線イを中心に回動して上送り
歯23を上昇するものを示したが、作用部18を
支持腕6の支持部25先端の下端面に係合させて
直接支持腕6を回動し、上送り腕21を介して上
送り歯23を上昇するようにしてもよい。 Further, in this embodiment, the action portion 18 of the connecting arm 7 engages with the upper feed arm 21, and rotates the support arm 6 around the axis A of the support shaft via the upper feed arm 21, thereby causing the upper feed tooth to rotate. 23 is shown, the action part 18 is engaged with the lower end surface of the tip of the support part 25 of the support arm 6 to directly rotate the support arm 6, and the upper feed dog 23 is raised via the upper feed arm 21. may be made to rise.
以上のようにこの発明によれば、
押え腕の回動軸線を中心に回動可能に基端を支
持しそれより水平方向に離隔する先端を手動操作
部材に連結した作用腕5と、作用腕と上送り腕と
の間に配置し作用腕の回動に関連して上送り歯を
針板から上昇する連結手段7と、作用腕と押え腕
とに関連配置し上送り歯が押え足上方に上昇する
のに対応する作用腕の回転角において互いに係合
し連結状態にする作用手段1a,8とを設けたこ
とにより、操作手段の操作により押え足より上送
り歯が先行して上昇し、押え足上面よりも上送り
歯下面が上方に位置するまで上送り歯が上昇して
から押え足が操作手段に連結して上昇し始める構
成なので、上送り歯は常に押え足下面より上方に
位置するから布の出し入れの妨げとならず、また
上送り歯が押え足より上方に位置するから押え足
を押し下げる作業を要せず押え腕を水平回動で
き、作業能率を著しく向上する効果が得られる。 As described above, according to the present invention, the working arm 5 has a proximal end supported rotatably about the rotation axis of the presser arm, and a distal end horizontally spaced apart from the base end connected to a manual operation member, and the working arm 5. a connecting means 7 disposed between the upper feed dog and the upper feed arm to raise the upper feed dog from the throat plate in relation to the rotation of the working arm; By providing the operating means 1a and 8 that engage with each other and establish a connected state at the rotational angle of the operating arm corresponding to the movement of the upper feed dog to the presser foot, the upper feed dog rises in advance of the presser foot when the operating means is operated. , the upper feed dog is raised until the lower surface of the upper feed dog is located above the upper surface of the presser foot, and then the presser foot is connected to the operating means and begins to rise, so the upper feed dog is always positioned above the lower surface of the presser foot. The upper feed dog is located above the presser foot, so the presser arm can be rotated horizontally without having to push down the presser foot, which significantly improves work efficiency. can get.
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、第10図は第二
実施例の上送り装置の正面図、第11図は第10
図主要部の斜視図、第12図は第三実施例の上送
り装置の主要部の斜視図である。
Fig. 1 is a perspective view of the upper feeding device and lifting device of this embodiment, Fig. 2 is a front view of the upper feeding arm lifting mechanism of the upper feeding device, and Fig. 3 is a front explanatory view of the swinging mechanism of the upper feeding device. , Figures 4 to 6 are explanatory diagrams explaining the connection state of the working arm and the support shaft, Figures 7 to 9 are explanatory diagrams of the upper feed arm lifting mechanism corresponding to Figures 4 to 6, and Figure 10 is the second A front view of the upper feeding device of the embodiment, FIG.
FIG. 12 is a perspective view of the main part of the upper feed device of the third embodiment.
Claims (1)
るように布送り方向に直交する水平軸線を中心に
回転可能に機枠に支持し常には押え足を針板上に
圧接する回転方向の弾性力を受ける押え腕3と、 先端に押え足に近接して針板に対向する上送り
歯を固定し、基板を押え腕の回動軸線に平行し且
つミシン主軸に連動して布送り方向に沿い揺動す
る軸線を中心に回動可能とした上送り腕21と、 ミシン主軸に連動し上送り腕先端を上下方向へ
揺動させる揺動機構28,29、とを有するミシ
ンにおいて、 押え腕の回動軸線を中心に回動可能に基端を支
持しそれより水平方向に離隔する先端を手動操作
部材に連結した作用腕5と、 作用腕と上送り腕との間に配置し作用腕の回動
に関連して上送り歯を針板上から上昇する連結手
段7と、 作用腕と押え腕とに関連配置し上送り歯が押え
足上方に上昇するのに対応する作用腕の回転角に
おいて互いに係合し連結状態にする作用手段1
a,8、 とを備えた上送りミシンの押え上げ装置。[Scope of Claims] 1. A presser foot is fixed to the tip and supported on the machine frame so as to be rotatable about a horizontal axis perpendicular to the cloth feeding direction so as to move the presser foot toward and away from the throat plate. A presser arm 3 which receives an elastic force in the direction of rotation presses against the plate, and an upper feed dog which faces the throat plate and is close to the presser foot is fixed at the tip, and the plate is held parallel to the axis of rotation of the presser arm and is connected to the sewing machine. An upper feed arm 21 that is rotatable about an axis that oscillates along the cloth feeding direction in conjunction with the main shaft, and swing mechanisms 28 and 29 that are interlocked with the main shaft of the sewing machine and that swing the tip of the upper feed arm in the vertical direction. , a working arm 5 whose base end is rotatably supported around the rotational axis of the presser arm and whose distal end spaced apart horizontally from the base end is connected to a manual operating member; the working arm and the upper feeder; a connecting means 7 disposed between the working arm and the upper feed dog to raise it above the throat plate in relation to the rotation of the working arm; and a connecting means 7 arranged in relation to the working arm and the presser arm to raise the upper feed dog above the presser foot. Acting means 1 that engage with each other at a rotational angle of the operating arm corresponding to
A presser foot lifting device for a top-feed sewing machine equipped with a, 8, and.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15978883A JPS6053177A (en) | 1983-08-31 | 1983-08-31 | Push-up apparatus of walking sewing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15978883A JPS6053177A (en) | 1983-08-31 | 1983-08-31 | Push-up apparatus of walking sewing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6053177A JPS6053177A (en) | 1985-03-26 |
JPS6116477B2 true JPS6116477B2 (en) | 1986-04-30 |
Family
ID=15701278
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15978883A Granted JPS6053177A (en) | 1983-08-31 | 1983-08-31 | Push-up apparatus of walking sewing machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6053177A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH062195B2 (en) * | 1985-11-27 | 1994-01-12 | ペガサスミシン製造株式会社 | Overlock sewing machine |
-
1983
- 1983-08-31 JP JP15978883A patent/JPS6053177A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6053177A (en) | 1985-03-26 |
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