JPH0240352B2 - - Google Patents
Info
- Publication number
- JPH0240352B2 JPH0240352B2 JP61020319A JP2031986A JPH0240352B2 JP H0240352 B2 JPH0240352 B2 JP H0240352B2 JP 61020319 A JP61020319 A JP 61020319A JP 2031986 A JP2031986 A JP 2031986A JP H0240352 B2 JPH0240352 B2 JP H0240352B2
- Authority
- JP
- Japan
- Prior art keywords
- looper
- shaft
- drive
- fixed
- arm
- 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 - Lifetime
Links
- 238000009958 sewing Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000002079 cooperative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【発明の詳細な説明】
［発明の技術分野］
本発明はミシンのルーパ駆動装置に関し、特に
機構が簡単で小型のルーパ駆動装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a looper drive device for a sewing machine, and particularly to a small-sized looper drive device with a simple mechanism.
［発明の技術的背景及び問題点］
従来、縁がかりミシンのルーパ駆動装置におい
ては、第６図に示すように駆動軸１０１のクラン
ク１０２と揺動軸１０４に固着された腕１０５と
をリンク１０３で球連結し駆動軸１０１の回転に
より揺動腕１０６を揺動させて上ルーパ１０７に
レシプロ運動をさせており、又、下ルーパ１０８
は上ルーパとは別に駆動軸に連結した別のリンク
等により揺動運動を行わせているため、一般に機
構が大型化し複雑となり、各部品の精度を高くし
ないと組立、調整が困難であつた。特に球面連結
部は高精度を要するため、製造コストも高くなら
ざるを得なかつた。[Technical Background and Problems of the Invention] Conventionally, in a looper drive device for an edge sewing machine, as shown in FIG. The swinging arm 106 is swung by the rotation of the drive shaft 101, causing the upper looper 107 to perform reciprocating motion.
Since the oscillating motion is performed by a separate link connected to the drive shaft in addition to the upper looper, the mechanism is generally large and complex, and assembly and adjustment are difficult unless the precision of each part is high. . In particular, since the spherical connecting portion requires high precision, the manufacturing cost must also be high.
［発明の目的］
本発明は上記従来技術の難点を解消するためな
されたもので、機構が簡単で小型であり、組立時
の調整のいらない製造コストの安いルーパ駆動装
置を提供せんとするものである。[Object of the Invention] The present invention has been made in order to solve the above-mentioned drawbacks of the prior art.It is an object of the present invention to provide a looper drive device with a simple mechanism, small size, and low manufacturing cost that does not require adjustment during assembly. be.
［発明の概要］
このような目的を達成するために本発明のルー
パ駆動装置は、駆動軸に二つの溝を有する球面カ
ムを固着し、この球面カムの二つの溝にそれぞれ
係合し且つ球面カムの回転に応じて揺動する二つ
の駆動腕に、上ルーパ及び下ルーパを駆動する
軸、リンク等を連結したもので、更に詳しくは駆
動軸に固定され且つ一周に亘る二つの溝を有する
鼓形の球面カムと、該球面カムの第一の溝に係合
する上ルーパ駆動腕と、該上ルーパ駆動腕が固着
され且つ前記駆動軸と直交する上ルーパ軸と、該
上ルーパ軸に固着された上ルーパ取付軸駆動腕
と、該上ルーパ取付軸駆動腕に揺動自在に連結さ
れ且つ上端に上ルーパを固着した上ルーパ取付軸
とを有する上ルーパ駆動装置および前記球面カム
の第二の溝に係合する下ルーパ駆動腕と、該下ル
ーパ駆動腕が固着され且つ前記駆動軸と直交する
下ルーパ軸と該下ルーパ軸に固着され且つ上端に
下ルーパを固着した下ルーパ取付腕とを有する下
ルーパ駆動装置とから成る。[Summary of the Invention] In order to achieve such an object, the looper drive device of the present invention has a spherical cam having two grooves fixed to the drive shaft, engages with the two grooves of the spherical cam, and Two drive arms that swing according to the rotation of the cam are connected to a shaft, link, etc. that drives the upper and lower loopers.More specifically, it is fixed to the drive shaft and has two grooves that extend around the circumference. an hourglass-shaped spherical cam; an upper looper drive arm that engages with a first groove of the spherical cam; an upper looper shaft to which the upper looper drive arm is fixed and perpendicular to the drive shaft; an upper looper drive device having a fixed upper looper mounting shaft drive arm; and an upper looper mounting shaft that is swingably connected to the upper looper mounting shaft drive arm and has the upper looper fixed to its upper end; a lower looper drive arm that engages with the second groove; a lower looper shaft to which the lower looper drive arm is fixed and which is perpendicular to the drive shaft; and a lower looper installation in which the lower looper is fixed to the upper end. a lower looper drive device having an arm;
［発明の実施例］
以下、本発明の好ましい実施例を図面により説
明する。第１図は縁かがりミシンに本発明のルー
パ駆動装置を取付けた図でプーリ１と同軸回転す
る駆動軸２に球面カム３が固着される。球面カム
３はその一周に亘つて二つのカム溝、上ルーパカ
ム溝３１と下ルーパカム溝３２が形成されてい
る。これらカム溝３１及び３２は、駆動軸２の軸
線に垂直な線に対し所定の角度を持つて形成さ
れ、且つ互いの位相が約36゜ずれている（第４
図）。第２図に示すように、上ルーパ駆動腕４及
び下ルーパ駆動腕５は各々、その先端にカムロー
ラ４１，５１が嵌着され、カムローラ４１及びカ
ムローラ５１がそれぞれ球面カム３の上ルーパカ
ム溝３１及び下ルーパカム溝３２に係合する。
又、上ルーパ駆動腕４はその脚部が上ルーパ軸６
に固着される。上ルーパ軸６は駆動軸２と直交
し、ミシン本体の一部に枢着される。また上ルー
パ軸６には上ルーパ取付軸駆動腕７が上ルーパ駆
動腕４と所定の角をなすように固着されており、
上ルーパ駆動腕４の揺動に伴ない一体に揺動す
る。上ルーパ取付軸揺動腕７の先端には上ルーパ
取付軸８がピン９により回転可能に連続される。
上ルーパ取付軸８はミシン本体の一部に回転自在
に取付けられたピポツト１０内を摺動可能に貫通
しており、上端には上ルーパ１１が固着される。
一方、下ルーパ駆動腕５はその脚部が下ルーパ軸
１２に固着される。下ルーパ軸１２は駆動軸２と
直交し、ミシン本体の一部に枢着される。また下
ルーパ軸１２には下ルーパ取付腕１３が固着され
下ルーパ駆動腕５の揺動に伴ない下ルーパ駆動腕
５と一体に揺動する。下ルーパ取付腕１３の先端
には下ルーパ１４が固着される。又、本実施例で
は球面カム３と一体に針棒偏心カム１５が形成さ
れる。針棒偏心カム１５は球面カム３とは別個に
駆動軸２に固着してもよい。又、球面カム３自体
もカム溝３１が形成されている部分とカム溝３２
が形成されている部分とに分けて形成してもよ
い。針棒偏心カム１５には針棒たてロツド１６が
結合し、針棒たてロツド１６上端は針棒クランク
腕１７の一方の揺動腕１７′が連結される。針棒
クランク腕１７はクランク軸１８を中心に揺動
し、もう一方の揺動腕１７″に針棒リンク１９を
介して針棒抱き２０が連結される。針棒抱き２０
には針棒２１が固定され、更に針棒２１には針２
２が取付けられる。２３は針板である。このよう
な構成において本発明のルーパ駆動装置の動作を
第１図および第３図に基き説明する。プーリ１の
回転によつて駆動軸２及び球面カム３が回転する
と球面カム３の上ルーパカム溝３１と係合する上
ルーパ駆動腕４は第３図において実線で示す位置
から二点鎖線で示す位置へ上ルーパ軸６を中心に
回動し、更に球面カム３が回転して一回転する
と、再び元の実線で示す位置へ戻る。この上ルー
パ駆動腕４の揺動により、上ルーパ軸６に固定さ
れた上ルーパ取付軸駆動腕７は上ルーパ軸６を中
心に一体的に揺動する。上ルーパ取付軸駆動腕７
が揺動すると、その揺動端に連結された上ルーパ
取付軸８は実線で示す位置から図中、ピボツト１
０内を摺動しながら反時計方向に回動して上昇し
上死点に至つた後、今後は時計方向に回動しなが
ら下降し、元の下死点に達する。この上ルーパ取
付軸８の動きによつて先端に取付けられた上ルー
パ１１は軌跡L1を描いて運動することになる。[Embodiments of the Invention] Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a looper drive device of the present invention attached to an overlock sewing machine, in which a spherical cam 3 is fixed to a drive shaft 2 that rotates coaxially with a pulley 1. Two cam grooves, an upper looper cam groove 31 and a lower looper cam groove 32, are formed around the spherical cam 3. These cam grooves 31 and 32 are formed at a predetermined angle with respect to a line perpendicular to the axis of the drive shaft 2, and are out of phase with each other by about 36 degrees (the fourth
figure). As shown in FIG. 2, the upper looper driving arm 4 and the lower looper driving arm 5 each have cam rollers 41 and 51 fitted to their tips, and the cam roller 41 and the cam roller 51 are connected to the upper looper cam groove 31 and the spherical cam 3, respectively. It engages with the lower looper cam groove 32.
Further, the leg of the upper looper driving arm 4 is attached to the upper looper shaft 6.
is fixed to. The upper looper shaft 6 is perpendicular to the drive shaft 2 and is pivotally mounted to a part of the sewing machine body. Further, an upper looper mounting shaft drive arm 7 is fixed to the upper looper shaft 6 so as to form a predetermined angle with the upper looper drive arm 4.
The upper looper drive arm 4 swings together with the swing. An upper looper attachment shaft 8 is rotatably connected to the tip of the upper looper attachment shaft swinging arm 7 by a pin 9 .
The upper looper attachment shaft 8 slidably passes through a pivot 10 rotatably attached to a part of the sewing machine body, and an upper looper 11 is fixed to the upper end.
On the other hand, the leg portion of the lower looper driving arm 5 is fixed to the lower looper shaft 12. The lower looper shaft 12 is orthogonal to the drive shaft 2 and is pivotally mounted to a part of the sewing machine body. Further, a lower looper mounting arm 13 is fixed to the lower looper shaft 12 and swings together with the lower looper driving arm 5 as the lower looper driving arm 5 swings. A lower looper 14 is fixed to the tip of the lower looper mounting arm 13. Further, in this embodiment, a needle bar eccentric cam 15 is formed integrally with the spherical cam 3. The needle bar eccentric cam 15 may be fixed to the drive shaft 2 separately from the spherical cam 3. Also, the spherical cam 3 itself has a portion where the cam groove 31 is formed and a portion where the cam groove 32 is formed.
It may be formed separately from the part where is formed. A needle bar vertical rod 16 is coupled to the needle bar eccentric cam 15, and one swinging arm 17' of a needle bar crank arm 17 is connected to the upper end of the needle bar vertical rod 16. The needle bar crank arm 17 swings around a crankshaft 18, and a needle bar holder 20 is connected to the other swing arm 17'' via a needle bar link 19. Needle bar holder 20
A needle bar 21 is fixed to the needle bar 21, and the needle 2 is fixed to the needle bar 21.
2 is installed. 23 is a throat plate. The operation of the looper drive device of the present invention in such a configuration will be explained based on FIGS. 1 and 3. When the drive shaft 2 and spherical cam 3 rotate due to the rotation of the pulley 1, the upper looper drive arm 4 that engages with the upper looper cam groove 31 of the spherical cam 3 moves from the position shown by the solid line to the position shown by the two-dot chain line in FIG. When the upper looper rotates around the upper looper shaft 6 and the spherical cam 3 further rotates once, it returns to the original position shown by the solid line. As the upper looper drive arm 4 swings, the upper looper mounting shaft drive arm 7 fixed to the upper looper shaft 6 swings integrally around the upper looper shaft 6. Upper looper mounting shaft drive arm 7
When the is swung, the upper looper mounting shaft 8 connected to the swiveling end moves from the position shown by the solid line to the pivot 1 in the figure.
0 while rotating counterclockwise and rising to reach the top dead center, from now on, it descends while rotating clockwise and reaches the original bottom dead center. Due to this movement of the upper looper attachment shaft 8, the upper looper 11 attached to the tip moves in a trajectory L1 .
一方、下ルーパ駆動腕５もまたプーリ１の回転
によつて球面カム３が回転すると、球面カム３の
下ルーパカム溝３２の動きに規制されて実線で示
す位置から二点鎖線で示す位置へ下ルーパ軸１２
を中心に回動し、球面カム３が更に回転して一回
転すると、元の実線で示す位置へ戻る。この下ル
ーパ駆動腕５の揺動に伴ない下ルーパ軸１２に固
着された下ルーパ取付腕１３も一体に揺動し、下
ルーパ取付腕１３に固着された下ルーパ１４は軌
跡L2を描く左右の往復運動をする。この間、球
面カム３と一体に形成される針棒偏心カム１５も
回転し、これによつて針棒たてロツド１６が上下
方向の往復運動をする。針棒たてロツド１６の運
動によつて針棒クランク腕１７がクランク軸１８
を中心に揺動し、針棒リンク１９を介して針棒抱
き２０を上下方向に運動させる。これにより針棒
２１及び針２２が上下方向に往復運動する。 On the other hand, when the spherical cam 3 rotates due to the rotation of the pulley 1, the lower looper drive arm 5 is regulated by the movement of the lower looper cam groove 32 of the spherical cam 3, and moves downward from the position shown by the solid line to the position shown by the two-dot chain line. Looper shaft 12
When the spherical cam 3 further rotates once, it returns to the original position shown by the solid line. As the lower looper drive arm 5 swings, the lower looper mounting arm 13 fixed to the lower looper shaft 12 also swings together, and the lower looper 14 fixed to the lower looper mounting arm 13 draws a trajectory L 2 Make left and right reciprocating movements. During this time, the needle bar eccentric cam 15 formed integrally with the spherical cam 3 also rotates, thereby causing the needle bar vertical rod 16 to reciprocate in the vertical direction. The needle bar crank arm 17 is moved to the crank shaft 18 by the movement of the needle bar vertical rod 16.
The needle bar holder 20 is moved in the vertical direction via the needle bar link 19. This causes the needle bar 21 and needle 22 to reciprocate in the vertical direction.
次に、針２２、上ルーパ１１及び下ルーパ１４
の協同作用について第３図及び第５図に基き説明
する。 Next, the needle 22, the upper looper 11 and the lower looper 14
The cooperative action will be explained based on FIGS. 3 and 5.
針２２が針板２３上方の上死点にある時を0゜、
下死点にある時を180゜とする。まず、針２２が0゜
から180゜に下降する時、上ルーパ１１は針２２よ
り36゜遅れて上死点に達した後、後退し始め、後
退の途中下降してくる針２２の前側を通過し、こ
の時針２２によつて上ルーパ糸Ｃをすくわれなが
ら後退し針２２は下降する。この間、左ルーパ１
４は針２２と同期して0゜で右端から左端へ向けて
移動し、180゜で左端に達して右方へ戻る時、下死
点（180゜）から上昇してくる針２２の後側を通過
し、針糸Ａをすくつて移動し続ける。そして、更
に右方へ移動する時、最下点から上昇してくる上
ルーパ１１によつて下ルーパ糸Ｂをすくわれなが
ら右端（360゜）に戻る。このような運動のくり返
しにより第５図の縁かがり縫いが形成される。 When the needle 22 is at the top dead center above the throat plate 23, it is 0°.
The angle at bottom dead center is 180°. First, when the needle 22 descends from 0° to 180°, the upper looper 11 reaches the top dead center 36° later than the needle 22, and then begins to move backwards, moving the front side of the descending needle 22 during the backward movement. At this time, the needle 22 moves backward while scooping up the upper looper thread C, and the needle 22 descends. During this time, left looper 1
4 moves from the right end to the left end at 0° in synchronization with the hand 22, and when it reaches the left end at 180° and returns to the right, the rear side of the hand 22 rises from the bottom dead center (180°). , and continues moving, picking up needle thread A. Then, when moving further to the right, the lower looper yarn B is scooped up by the upper looper 11 rising from the lowest point and returns to the right end (360 degrees). By repeating such movements, the overedge stitch shown in FIG. 5 is formed.
［発明の効果］
以上の実施例からも明らかなように、本発明の
ルーパ駆動装置では、駆動軸に固着した一つの球
面カムによつて上、下ルーパを駆動するようにし
たので従来のルーパ駆動装置に比べ部品数が少な
く機構が簡単で、しかも上下ルーパのタイミング
に狂いがない。針棒偏心カムを球面カムと一体に
することにより、更に部品数を少なくできる。
又、組立時の調整が不要であり、製造原価の高い
球面連結部を用いていないので製造コストも低く
することができる。[Effects of the Invention] As is clear from the above embodiments, in the looper drive device of the present invention, the upper and lower loopers are driven by one spherical cam fixed to the drive shaft. Compared to a drive device, the number of parts is small and the mechanism is simple, and the timing of the upper and lower loopers is consistent. By integrating the needle bar eccentric cam with the spherical cam, the number of parts can be further reduced.
In addition, there is no need for adjustment during assembly, and the manufacturing cost can be reduced because a spherical connecting portion, which is expensive to manufacture, is not used.
第１図は本発明のルーパ駆動装置を用いたミシ
ンの全体図、第２図はルーパ駆動装置の要部分解
図、第３図はルーパ駆動装置の正面図、第４図は
針、上ルーパ及び下ルーパの各位相を示す図、第
５図は縁かがり縫いを示す図、第６図は従来のル
ーパ駆動装置を示す図である。
１……プーリ、１……駆動軸、３……球面カ
ム、３１……上ルーパカム溝、３２……下ルーパ
カム溝、４……上ルーパ駆動腕、５……下ルーパ
駆動腕、６……上ルーパ軸、７……上ルーパ取付
軸駆動腕、８……上ルーパ取付軸、１０……ピボ
ツト、１１……上ルーパ、１２……下ルーパ軸、
１３……下ルーパ取付腕、１４……下ルーパ、１
５……針棒偏心カム、１６……針棒たてロツド、
１７……針棒クランク腕、１９……針棒リンク、
２０……針棒抱き、２１……針棒、２２……針、
２３……針板。
Fig. 1 is an overall view of a sewing machine using the looper drive device of the present invention, Fig. 2 is an exploded view of essential parts of the looper drive device, Fig. 3 is a front view of the looper drive device, and Fig. 4 shows the needle and upper looper. FIG. 5 is a diagram showing overlock stitching, and FIG. 6 is a diagram showing a conventional looper driving device. 1... Pulley, 1... Drive shaft, 3... Spherical cam, 31... Upper looper cam groove, 32... Lower looper cam groove, 4... Upper looper drive arm, 5... Lower looper drive arm, 6... Upper looper shaft, 7... Upper looper mounting shaft drive arm, 8... Upper looper mounting shaft, 10... Pivot, 11... Upper looper, 12... Lower looper shaft,
13...Lower looper mounting arm, 14...Lower looper, 1
5...Needle bar eccentric cam, 16...Needle bar vertical rod,
17...Needle bar crank arm, 19...Needle bar link,
20...Needle bar holder, 21...Needle bar, 22...Needle,
23... Throat plate.
Claims (1)
有する鼓形の球面カムと、該球面カムの第１の溝
に係合する上ルーパ駆動腕と、該上ルーパ駆動腕
が固着され且つ前記駆動軸と直交する上ルーパ軸
と、該上ルーパ軸に固着された上ルーパ取付軸駆
動腕と、該上ルーパ取付軸駆動腕に揺動自在に連
結され且つ上端に上ルーパを固着した上ルーパ取
付軸とを有する上ルーパ駆動装置および前記球面
カムの第２の溝に係合する下ルーパ駆動腕と、該
下ルーパ駆動腕が固着され且つ前記駆動軸と直交
する下ルーパ軸と、該下ルーパ軸に固着され且つ
上端に下ルーパを固着した下ルーパ取付腕とを有
する下ルーパ駆動装置から成り、前記上ルーパ及
び前記下ルーパはそれぞれ同一平面内を揺動する
ように位置することを特徴とする縁かがりミシン
のルーパ駆動装置。1. A drum-shaped spherical cam fixed to the drive shaft and having two grooves extending around one circumference, an upper looper drive arm that engages with the first groove of the spherical cam, and the upper looper drive arm is fixed and the above-mentioned an upper looper shaft perpendicular to the drive shaft, an upper looper mounting shaft drive arm fixed to the upper looper shaft, and an upper looper swingably connected to the upper looper mounting shaft drive arm and having the upper looper fixed to its upper end. an upper looper drive device having a mounting shaft; a lower looper drive arm that engages with the second groove of the spherical cam; a lower looper shaft to which the lower looper drive arm is fixed and perpendicular to the drive shaft; It consists of a lower looper drive device having a lower looper mounting arm fixed to a looper shaft and having a lower looper fixed to its upper end, and the upper looper and the lower looper are each positioned so as to swing within the same plane. A looper drive device for an overlock sewing machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2031986A JPS62176487A (en) | 1986-01-29 | 1986-01-29 | Looper driving apparatus of binding sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2031986A JPS62176487A (en) | 1986-01-29 | 1986-01-29 | Looper driving apparatus of binding sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62176487A JPS62176487A (en) | 1987-08-03 |
| JPH0240352B2 true JPH0240352B2 (en) | 1990-09-11 |
Family
ID=12023809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2031986A Granted JPS62176487A (en) | 1986-01-29 | 1986-01-29 | Looper driving apparatus of binding sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62176487A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0751481A (en) * | 1993-08-10 | 1995-02-28 | Suzuki Seisakusho:Kk | Looper driving mechanism for sewing machine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2931328A (en) * | 1951-11-21 | 1960-04-05 | Merrow Machine Co | Looper carrier for sewing machine |
| US3450078A (en) * | 1968-03-18 | 1969-06-17 | Merrow Machine Co | Looper carrier for sewing machine |
| JPS5436856A (en) * | 1977-08-24 | 1979-03-17 | Suzuki Mfg | Method of driving looper of hem darning sewing machine and looper driving gear |
| JPS5748236A (en) * | 1980-09-05 | 1982-03-19 | Toshiba Corp | Dry etching device |
-
1986
- 1986-01-29 JP JP2031986A patent/JPS62176487A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2931328A (en) * | 1951-11-21 | 1960-04-05 | Merrow Machine Co | Looper carrier for sewing machine |
| US3450078A (en) * | 1968-03-18 | 1969-06-17 | Merrow Machine Co | Looper carrier for sewing machine |
| JPS5436856A (en) * | 1977-08-24 | 1979-03-17 | Suzuki Mfg | Method of driving looper of hem darning sewing machine and looper driving gear |
| JPS5748236A (en) * | 1980-09-05 | 1982-03-19 | Toshiba Corp | Dry etching device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62176487A (en) | 1987-08-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |