JPS5846987A - Stitch adjusting apparatus in main stitch seweing machine - Google Patents
Stitch adjusting apparatus in main stitch seweing machineInfo
- Publication number
- JPS5846987A JPS5846987A JP14557981A JP14557981A JPS5846987A JP S5846987 A JPS5846987 A JP S5846987A JP 14557981 A JP14557981 A JP 14557981A JP 14557981 A JP14557981 A JP 14557981A JP S5846987 A JPS5846987 A JP S5846987A
- Authority
- JP
- Japan
- Prior art keywords
- thread
- stitch
- thread tension
- bobbin
- bobbin thread
- 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.)
- Granted
Links
- 238000009958 sewing Methods 0.000 claims description 27
- 239000004744 fabric Substances 0.000 description 5
- 210000000554 iris Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 206010041235 Snoring Diseases 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
(技術分野)
本発明は一本縫ξシンにおける縫目調節装置Kgkl)
、特に縫いの種類に応じて縫目′ の調節が當に最適に
なるようにした本縫ミシンにおける縫目調節装置に関す
る。Detailed Description of the Invention (Technical Field) The present invention relates to a stitch adjustment device (Kgkl) in a single stitch ξ-thin.
In particular, the present invention relates to a stitch adjustment device for a lockstitch sewing machine, which allows the adjustment of the stitches to be optimized depending on the type of stitch.
(従来技術)
従来、本縫ミシンにおける縫目調節は、一般に容易にで
きる上糸張力の調節によって行われている。(Prior Art) Conventionally, stitch adjustment in a lockstitch sewing machine is generally performed by easily adjusting needle thread tension.
即ち、上糸調子器の操作ダイヤルを操作して上糸張力の
調節が行われているが、稀には下糸を収容しているボビ
ンケースの調節ばねを調節して下糸張力を調節すること
もあったーしかしこの下糸張力の調節は面倒なのであま
9行われていなかった。That is, the upper thread tension is adjusted by operating the operation dial of the upper thread tension device, but in rare cases, the lower thread tension is adjusted by adjusting the adjustment spring of the bobbin case that houses the lower thread. However, since adjusting the bobbin thread tension is troublesome, it has not been done many times.
このため本縫ミシンにおける各種の縫いに対して最適の
縫目を得ることはできなかった。For this reason, it has not been possible to obtain optimal stitches for various types of stitching in lockstitch sewing machines.
例えば、第1図に示すように、直線縫においては、上糸
(1)と下糸(2)の交差点(P)は布(3]の#1は
中央部−)点で交差することが望ましいが、第2図に示
すように、ジグザグ縫においては上糸(1)と下振(2
)との交差点菅)を重厚の中央部伽)点にする・と、下
糸Q)が布(33上面より見木るのでmtL<なく、む
しろ纂3図に示すように、交差点(ト)を布(3)の下
TijJ (6)点に移動させるのが望ましい暴
このように本縫ミシンにおいては、縫い0種類によって
上糸(1)と下糸(2)との交差点(3)の位置を変え
ることが望ましいものであ)、このため上糸張力及び下
糸張力をその都度調節することが望ましいが、この作業
、特に下糸張力の、調節は面倒であり、作業者にとって
非常に煩しいことであった・
(目 的)
本発明は、上記のような従来技術の欠点を除くためKな
されたものであつズ、その目的とするところは、上糸張
力及び下糸張力に関係のある天秤上死点付近における下
糸の引出し量を操作部材の操作に連動して調節できるよ
うにすることによ〕、各種の縫いの種類に応じて最も望
ましい縫目が得られるようKすることであるーまた他の
目的は、特定の縫いに対して最も望ましい縫目が得られ
るように予め調節しておくだけで、他の縫いに対しても
自動的に最−望ましい縫目が得られるようkすると七で
ある・
(解決手段)
要するに本発明は1縫い0毎に≦機構よ)下糸を引き出
すようkした下糸引出し部材を設けた本縫ミシンにおい
て、前記下糸引出し部材の下糸引出し量を制御する下糸
制御部材を操作部材に連動して作動させる下糸引出し調
節装置と、一対の糸調子皿に上糸張力を付与する一組の
糸調子ばねの一方を前記操作部材に連動して作動と不作
動の状1aK切ル替えることができる上糸張力調節装置
とを設けたことを特徴とするものである。For example, as shown in Figure 1, in straight stitching, the intersection (P) of the upper thread (1) and lower thread (2) may intersect at the point #1 of the fabric (3) at the center. However, as shown in Figure 2, when sewing a zigzag stitch, the upper thread (1)
) is the point in the middle of the thick central part.The lower thread Q) can be seen from the upper surface of the fabric (33), so there is no mtL<, but rather, as shown in Figure 3, the intersection (g) In this way, in a lockstitch sewing machine, the intersection point (3) of the upper thread (1) and lower thread (2) is moved by the 0 stitch type. Therefore, it is desirable to adjust the needle thread tension and bobbin thread tension each time, but this work, especially adjusting the bobbin thread tension, is troublesome and very tedious for the operator. (Purpose) The present invention has been made in order to eliminate the drawbacks of the prior art as described above. By making it possible to adjust the amount of bobbin thread pulled out near the top dead center of a certain thread take-up in conjunction with the operation of the operating member, it is possible to obtain the most desirable stitches depending on the type of sewing. Another purpose is to automatically obtain the most desirable stitch for other stitches by simply making adjustments in advance to obtain the most desirable stitch for a particular stitch. (Solution Means) In short, the present invention provides a lockstitch sewing machine equipped with a bobbin thread pull-out member that pulls out the bobbin thread every 0 stitches (≦mechanism). A lower thread draw-out adjustment device that operates a lower thread control member that controls the amount of lower thread pulled out in conjunction with an operating member, and one of a pair of thread tension springs that applies upper thread tension to a pair of thread tension discs is operated as described above. The present invention is characterized in that it is provided with an upper thread tension adjusting device which can be switched between active and inactive state 1aK in conjunction with the member.
(IK施例〕
以下本発明を図面に示す実施例に基づいて説明する・第
4図〜第6図において1本発明に係る装置(5)は、縫
模様選択装置(6)、上糸張力調節装置(η及び下糸引
出し調節装置(8)を備えている・
縫模様選択装置(6)は−ミシン機枠(wJ示せず)K
11着されたカム軸輪、該カム軸K ミシン機枠に回動
自在に支承された上軸(ロ)に連動して歯車機構(2)
を介して回動自在に嵌挿された複数の模様カム(2)、
カム軸(2)と平行に配置された送シねじ軸64KII
A合し模様カム93に選択的に係合する振幅用従動子(
2)及びミシン機枠に回動自在和支承されたダイヤル軸
(図示せず)に固着された操作部材の一例たる模様選択
ダイヤル(2)を備えている・該模様選択ダイヤル(2
)を回転させると、ダイヤル軸及び送りねじ軸tHK夫
々固着された爪*@とこれら爪車に装架されたベルト(
ト)を介して送りねじ軸Oが回転し、振幅用従動子(2
)が軸方向に移動し模様カム(2)K選択的に係合する
ようになっている。そして振幅用従動子(2)の揺動運
動は振幅ロンド(2)を介して図示しない針棒に揺動運
動を付与するようになっている。(IK Example) The present invention will be explained below based on the example shown in the drawings. In Figs. 4 to 6, the device (5) according to the present invention is a sewing pattern selection device (6), an upper thread The sewing machine frame (wJ not shown) is equipped with an adjustment device (η) and a bobbin thread drawer adjustment device (8).
11 attached cam shaft wheel, said cam shaft K. A gear mechanism (2) interlocks with the upper shaft (b) which is rotatably supported on the sewing machine frame.
a plurality of pattern cams (2) rotatably inserted through the
Feed screw shaft 64KII arranged parallel to camshaft (2)
An amplitude follower (
2) and a pattern selection dial (2) which is an example of an operating member fixed to a dial shaft (not shown) rotatably supported on the sewing machine frame.
) is rotated, the claws *@ fixed to the dial shaft and feed screw shaft tHK, respectively, and the belt (
The feed screw shaft O rotates via the amplitude follower (2
) moves in the axial direction to selectively engage the pattern cam (2)K. The oscillating motion of the amplitude follower (2) imparts oscillating motion to the needle bar (not shown) via the amplitude rond (2).
上糸張力調節装置(7)は、ミシン機枠に固着された糸
調子軸94に装着された糸調子機構(2)、糸調子軸輪
と平行に、ミシン機枠に固着された固定軸94に嵌挿さ
れた一対の糸調子皿(2)、 ゛中間部を枢軸輯によっ
てミシン機枠に枢着された調節部材に)及び一端を枢軸
V4によってミシン機枠に枢着された糸調子レバー(2
)とを備えている。The needle thread tension adjustment device (7) includes a thread tension mechanism (2) attached to a thread tension shaft 94 fixed to the sewing machine frame, and a fixed shaft 94 fixed to the sewing machine frame parallel to the thread tension shaft ring. a pair of thread tension discs (2) fitted into the holder, a thread tension lever whose middle portion is pivotally connected to the sewing machine frame by a pivot V4; (2
).
糸調子機構−は糸調子軸−のねじ部(20a)上部K1
1着され丸糸調子ダイヤル(イ)と、糸調子軸輪のねじ
部(20m)下部に嵌挿され且つ糸調子レバー(財)に
遊嵌された糸調子リング(31)と、糸調子レバー■と
糸調子ダイヤル■との間に糸調子軸輪に巻装された第1
の糸調子ばね(32)と、基調4ダイヤル(2)と糸調
子リング(31)との間に糸調子軸HK:!装された#
11の糸調子ばね(32)よシばね常数の小さい第2の
糸調子ばね(33)とを備えている。また糸調子レバー
@は糸ゆるめレバー(35)によって枢軸Wt−中心と
して矢印Aの方向に揺動する如くなっている−
調節部材四の一端に形成された従動子(喚)は、ダイヤ
ル軸に固着された第1の調節カム(3g)K図示しない
ばねによって圧接係合しておシ、他端(25b)は糸調
子リング(31)の下方の糸調子軸輪に遊嵌している。The thread tension mechanism is located at the upper part K1 of the threaded part (20a) of the thread tension shaft.
The circular thread tension dial (A), the thread tension ring (31) fitted into the lower part of the threaded part (20 m) of the thread tension shaft and loosely fitted into the thread tension lever, and the thread tension lever. The first thread wound around the thread tension shaft ring between ■ and the thread tension dial ■
The thread tension shaft HK:! is located between the thread tension spring (32), the keynote 4 dial (2), and the thread tension ring (31). equipped#
There are eleven thread tension springs (32) and a second thread tension spring (33) having a smaller spring constant. Further, the thread tension lever @ is configured to swing in the direction of arrow A about the pivot axis Wt by the thread loosening lever (35). The fixed first adjusting cam (3g) K is press-fitted by a spring (not shown), and the other end (25b) is loosely fitted into the thread tension shaft below the thread tension ring (31).
下糸引出し調節装置(8)は、下糸引出し部材の一例た
る送〕歯(3B)と、下糸制御部材(39)と、調節機
構(40)とを備えておシ、送シ@ (ss)はミシン
機枠に揺動自在に支承された水平送〕軸(43)に一端
を枢着された送シ台(45) K固着されている。tた
送〕歯(381には下糸引出し部(38a)が形成され
ている。下糸制御部材(39)は一端がζシン機枠に枢
軸(46) Kよって枢着され他端が送〕歯(38)の
下糸引出し部t38a)ic対向し得る如く下方に配設
されている。The bobbin thread pull-out adjusting device (8) includes a feed tooth (3B) which is an example of a bobbin thread pull-out member, a bobbin thread control member (39), and an adjustment mechanism (40). ss) is fixed to a feed table (45) K whose one end is pivotally connected to a horizontal feed shaft (43) which is swingably supported on the sewing machine frame. A bobbin thread pull-out portion (38a) is formed in the thread feed tooth (381).One end of the bobbin thread control member (39) is pivotally attached to the machine frame by a pivot (46), and the other end is pivoted to the thread feed tooth (381). ] The lower thread pull-out portion t38a)ic of the tooth (38) is disposed below so as to be opposed to it.
調節機構(40)はIglの調節レバー(47)、菖2
のV節しバー(48)、連結リンク(49)及び館2の
調節カム(50)とを備えておル、第1の調節レバー(
47)は中間部をミシン機枠に枢軸(51)によって枢
着され、一端に形成された従動子(47m)を下糸制御
部材(39)の裏面に係合させている。馬2の調節レバ
ー(48)は中間部をミシン機枠に枢軸(52)によっ
て枢着され、一端された菖2の調節カム(50) K図
示しないばねKよって圧接係合している。連結リンク(
49)の両端は第1の調節レバー(47)の他端及び第
2の調節レバーC48)の他端にビン(s5) Kよっ
て枢着されている。The adjustment mechanism (40) is an Igl adjustment lever (47), an irises 2
A first adjustment lever (48), a connecting link (49), and an adjustment cam (50) of the lever 2 are provided.
47) has an intermediate portion pivotally connected to the sewing machine frame by a pivot (51), and a follower (47m) formed at one end engages with the back surface of the bobbin thread control member (39). The adjusting lever (48) of the horse 2 has its intermediate portion pivoted to the sewing machine frame by a pivot (52), and is press-fitted by a spring K (not shown) of the adjusting cam (50) of the irises 2 having one end. Connecting link (
49) are pivotally connected to the other end of the first adjustment lever (47) and the other end of the second adjustment lever C48) by means of a pin (s5) K.
算4図に破線で示す水平釜(56)は、送〕歯(3B)
の下方に配tされておル、ミシン機枠に回動自在に支承
された下軸(57)に連動して歯車機構(58)を介し
て回動し得る如くなっている。The horizontal rotary hook (56) indicated by the broken line in Figure 4 is the feed tooth (3B).
The lower shaft (57) is rotatably supported on the sewing machine frame and can be rotated via a gear mechanism (58).
本発明は上記のように構成されてお〕、以下その作用に
ついて説明する。第6図に示すよう嵌送)歯(3B)の
一部に下糸引出し部(38m)を形成したことによや、
該下糸引出し部が送υ歯(38)の上下運動及び水平運
動の合成運動によ]P#17図及び第8図に破線で示す
ように運動することによシ下糸(2)の引出し及びvB
締めを行っている・まお同図において、 (75)は公
知の針板である。The present invention is constructed as described above, and its operation will be explained below. As shown in Fig. 6, the bobbin thread pull-out part (38m) is formed in a part of the fitting tooth (3B).
The bobbin thread (2) is pulled out by the bobbin thread pull-out section moving as shown by the broken lines in Fig. P#17 and Fig. drawer and vB
In the same figure while tightening, (75) is a known throat plate.
一般に上糸(1)と下糸(2)の縫目の交差点ケ)に対
する上糸張力の関係は、謔9図に線図で縦軸Ki1目の
交差点(ト)位置、横軸に上糸張力をとって示す如く、
例えばUを上布の上面、Mを上下布の合わせ面、Lを下
布の下面とすると、上下の糸張力の低い場合の曲線はE
とな〕、上下の糸張力が高い場合の曲線はGとなる。同
図から分るように、曲線Eで示す低い一上糸張力ではF
点で適正交差が得られ・曲線Gで示す高い上糸張力では
F点で適正交差が得られることを示している。また曲線
1.Gは下糸張力に変えて下糸(2)の引出し量、即ち
第7図における下糸引出し部(3B&)のストロークΔ
によっても類似的に決定することができ、ストロークΔ
の小さいほど、即ちう、1出し量の小さいほど高い下糸
張力が与えられ公差することが実験の結果明らかとなっ
ている。In general, the relationship between the needle thread tension at the intersection of the stitches of the needle thread (1) and the bobbin thread (2) is shown in Figure 9, where the vertical axis is the Ki1th intersection point (G) and the horizontal axis is the needle thread tension. As shown by taking the tension,
For example, if U is the upper surface of the upper fabric, M is the mating surface of the upper and lower fabrics, and L is the lower surface of the lower fabric, the curve when the upper and lower thread tensions are low is E.
], the curve when the upper and lower thread tensions are high is G. As can be seen from the figure, at low upper thread tension shown by curve E, F
It is shown that a proper intersection can be obtained at point F, and at a high needle thread tension shown by curve G, a proper intersection can be obtained at point F. Also curve 1. G is the pull-out amount of the bobbin thread (2) instead of the bobbin thread tension, that is, the stroke Δ of the bobbin thread pull-out part (3B&) in FIG.
The stroke Δ can also be determined analogously by
As a result of experiments, it has become clear that the smaller the number of threads, that is, the smaller the one-output amount, the higher the bobbin thread tension is applied and the tolerance is improved.
本発明は、とのス鼾ロークΔが同一であっても、下糸制
御部材(39)の位置を変えることによって、実質的に
下糸引出し量を変えられるようにしたものである。即ち
、第7図に示す如く、下糸制御部材(39)が上死点に
あるときは、天秤上死点付近における下糸(2)は下糸
引出し部(3B&)の上下運動によって十分に引き出さ
れるが、第8図に示す如く、下死点にあるときは殆ど下
糸Q)の引き出しはない−とのように下糸制御部材(3
9)の位置を変えることによって天秤上死点付近におけ
る下糸Q)の引出し量が変化し下糸の糸締め効果が実質
的に変化する4のであゐ。In the present invention, even if the snoring stroke Δ is the same, by changing the position of the bobbin thread control member (39), the amount of bobbin thread withdrawal can be substantially changed. That is, when the bobbin thread control member (39) is at the top dead center as shown in FIG. However, as shown in FIG.
By changing the position of 9), the amount of pull-out of the bobbin thread Q) near the top dead center of the thread take-up changes, thereby substantially changing the thread tightening effect of the bobbin thread.
第4図において、模様選択ダイヤル(2)を回転して適
宜な縫模様を選択すると、爪車(ロ)及びベルト■を介
して送ルねじ軸04が回転すると共に振幅用従動子(2
)が軸方向に移動し模様カ五〇に選択的に係合し振幅ロ
ッド輔を介して針棒に揺動運動を付与する。同時に11
12の調節レバー(48)は従動子(4k)を介して揺
動し、第1の調節レバー(47)が連結リンク(49)
t7介して枢軸(51)を中心として揺動するのする
と第1011節レバーC47)の従動子(47a)Kよ
って制御部材(39)は枢軸(46)を中心として移動
し一定位置に停止する・これによって第7図及び第8図
において説明したように1下糸(2)の引出し量が変化
し下糸の糸締め効果が実質的に変化する・
一方、調節部材(2)は従動子(2k)を介して枢軸−
を中心として揺動し、他端(25b)によって糸調子リ
ング(31)を押圧し得る如くなシ、該糸調子リングが
上方に移動すると、糸調子レバーw4に付与されるばね
圧は第1の糸調子ばね(32)だけとな9、一対の糸調
子皿に)間に挾持された上糸(1)に付与される張力、
即ち上糸張力が変化する。このように模様選択ダイヤル
(2)を適宜回転させて縫模様を選択した場合、第1の
調節カム(36)及び菖2の調節カム(50)の形状を
縫目の種類に応じて設定して><ことKよシ、上糸<1
)と下糸(2)O交差点(ロ)の位置が最も適正となる
よう和することができ、常に理想的な縫目が得られる。In Fig. 4, when the pattern selection dial (2) is rotated to select an appropriate sewing pattern, the feed screw shaft 04 is rotated via the ratchet wheel (B) and the belt ■, and the amplitude follower (2) is rotated.
) moves in the axial direction and selectively engages the pattern element 50, imparting an oscillating motion to the needle bar via the amplitude rod. 11 at the same time
The 12 adjustment levers (48) swing via the follower (4k), and the first adjustment lever (47) is connected to the connecting link (49).
When it swings around the pivot (51) through t7, the control member (39) moves around the pivot (46) and stops at a fixed position by the follower (47a)K of the 1011th node lever C47). As a result, as explained in FIGS. 7 and 8, the amount of pull-out of one bobbin thread (2) changes, and the thread tightening effect of the bobbin thread substantially changes. On the other hand, the adjusting member (2) 2k) Axis-
When the thread tension ring (31) is moved upward, the spring pressure applied to the thread tension lever w4 is Tension applied to the upper thread (1) held between only the thread tension spring (32) and the pair of thread tension discs,
That is, the needle thread tension changes. When a sewing pattern is selected by appropriately rotating the pattern selection dial (2) in this way, the shapes of the first adjustment cam (36) and the irises 2 adjustment cam (50) are set according to the type of stitch. te><Koto K Yoshi, needle thread<1
) and the bobbin thread (2) can be combined so that the position of the O intersection (b) is the most appropriate, and an ideal stitch can always be obtained.
そして、ある特定の縫いに対して糸調子ダイヤル(2)
を回動操り、他の縫いに対しては自動的に11.2の糸
調子ばね(33)の作動、不作動によシ最も望ましい縫
目が得られる。Then, set the thread tension dial (2) for a particular stitch.
The most desirable stitches can be obtained by rotating the thread tension spring (33) (11.2) automatically for other stitches.
第10511は本発明の第二実施例を示したもので、上
下道〕軸(60)は水平送〕軸(43)と平行に電シン
機枠に揺動自在に支承されている。No. 10511 shows a second embodiment of the present invention, in which a vertical shaft (60) is swingably supported on an electric machine frame parallel to a horizontal transport shaft (43).
調節カム(61)は上下送ル軸(60) K摺動自在に
嵌挿されており、外周面に形成された螺旋溝C5ta)
は上下道〕軸(60)に植設されたビン(62)K嵌入
している。tた調節カム(61)にはカム面(alb)
が形成されてお〕、該カム面には第一実施例の下糸引出
し部(38a)K相当する(3ム)を形成した下糸制御
部材(39)の下面が当接してお)、調節カム(61)
K形成された環状溝(610)には枢軸(6B) Kよ
ってミシン機枠に枢着され九揺動リンク(64)のビン
(65)が嵌入している−そして、該揺動リンクをロッ
ド(66) f介して操作部材04に連動させて揺動さ
せることKよム下糸1g1101S材(39)の運動位
相を変え天秤上死点付近における下糸引出し量及び下糸
引出し位相を変えるようにしえものてあシ、その他は第
一実施例と同じなので図面に符号を付して説明は省略す
る。The adjustment cam (61) is slidably inserted into the vertical feed shaft (60), and is inserted into the spiral groove C5ta formed on the outer circumferential surface.
A bottle (62) K is inserted into the shaft (60) of the upper and lower passageways. The adjustable cam (61) has a cam surface (alb).
is formed], and the lower surface of a bobbin thread control member (39) formed with (3 mm) corresponding to the bobbin thread pull-out portion (38a) K of the first embodiment is in contact with the cam surface); Adjustment cam (61)
A pin (65) of nine swing links (64), which is pivotally connected to the sewing machine frame by means of a pivot (6B) K, is fitted into the annular groove (610) formed in K. Then, the swing link is connected to the rod. (66) To change the movement phase of the K yam bobbin thread 1g1101S material (39) by making it swing in conjunction with the operating member 04 via f, and to change the bobbin thread pull-out amount and bobbin thread pull-out phase near the top dead center of the thread take-up. Since the handle and other parts are the same as those in the first embodiment, reference numerals are attached to the drawings and explanations thereof will be omitted.
第11図は本発明の第三実施例を示したもので、第二実
施例と異な)調節カム(61)のカム面(61b)は円
錐状と表っており、その他は第−及び第二実施例と同じ
なので、図面に符号を付して説明は省略する。FIG. 11 shows a third embodiment of the present invention, in which the cam surface (61b) of the adjusting cam (61) (which is different from the second embodiment) has a conical shape; Since it is the same as the second embodiment, reference numerals are attached to the drawings and explanation thereof will be omitted.
第12図は本発明の第四実施例を示したもので、針棒振
幅及び送−りをマイクロコンピュータからの信号によっ
て駆動するノ(ルスモータ(701(71)で制御する
よう圧したミシンにおいて、第一実施例の第1の調節レ
バー(47)をマイクロコンピュータに記憶された信号
によシ駆動する操作部材の一例たるノくルスモータ(7
2) Kよってパルスモータ(70) (71) K同
期して1サイクル中の各縫目毎に適正な下糸の引き出し
が行われるようKしたものである。その他は第一実施例
と同じなので図面に符号を付して説明は省略する・
(効 果)
本発明は上記の如く構成され、作用するものであるから
、上糸張力及び下糸張力に関係のある天秤上死点付近に
おける下糸の引出し量が操作部材の操作に連動して調節
することができるので、各種の縫いの種類に応じて最も
望ましい縫目が得られるという効果がある#またある特
定の縫いに対して最も望ましい縫目が得られるように予
め調節しておくことだけで、他の縫いに対しても自動的
に最も望ましい縫目が得られるという効果がある。FIG. 12 shows a fourth embodiment of the present invention, in which the needle bar amplitude and feed are controlled by a needle motor (701 (71)) driven by signals from a microcomputer. The control motor (7) is an example of an operating member that drives the first adjustment lever (47) of the first embodiment by a signal stored in a microcomputer.
2) Therefore, the pulse motors (70) and (71) are designed so that the lower thread is drawn out properly for each stitch in one cycle in synchronization with the pulse motors (70) and (71). The rest is the same as the first embodiment, so the reference numerals are attached to the drawings and the explanation is omitted. (Effects) Since the present invention is constructed and operates as described above, there are Since the amount of bobbin thread pulled out near the top dead center of a certain thread take-up can be adjusted in conjunction with the operation of the operating member, the most desirable stitch can be obtained depending on the type of sewing. By simply making adjustments in advance so that the most desirable stitches can be obtained for a particular stitch, there is an effect that the most desirable stitches can be automatically obtained for other stitches as well.
第1図は本縫ミシンにおける直線縫目の交差状態を示す
斜視図、第2図及び第3図は夫々本縫ミシンにおけるジ
グザグ縫目の交差状態を示す斜視図、第4図から第61
図は本発明の鎖−実施例を示したもので、第4図は本発
1jlIK係る装置の要部を示す斜視図、第5図は糸調
子機構を示す縦断面図、第6図は送シ歯と下糸制御部材
との関係を示す斜視図、第7図及び第8図は夫々送多歯
の下糸引出し部と下糸制御部材との関係を一部断面で示
す側面図、第9図は縫目交差位置と上糸張力との関係を
示す線図、第10図、第11図及び第12図は夫々本発
明の第二実施例、第三実施例及び鮪四実施例の下糸引出
し調節装置の要部を示す斜視図である・
図中、(2)は下糸、(7)は上糸張力調節装置、(8
)は下糸引出し調節装置、(2)は操作部材の一例たる
模様選択ダイヤル、輪は糸調子皿、(32) (33)
は夫々糸調子ばね、(38)は下糸引出し部材の一例た
る送シ歯、(39)は下糸制御部材、(56)は蕎機構
の一部たる水平釜である。
特許出願人 蛇の目ミシン工業株式会社発 明 者
羽 生 進第5図
り
第9図
第6図
第7図
第8図Fig. 1 is a perspective view showing the intersecting state of straight stitches in a lockstitch sewing machine, Figs. 2 and 3 are perspective views showing intersecting states of zigzag stitches in the lockstitch sewing machine, and Figs.
The figures show an embodiment of the chain according to the present invention. Fig. 4 is a perspective view showing the main parts of the device related to the invention, Fig. 5 is a longitudinal cross-sectional view showing the thread tension mechanism, and Fig. 6 is a feeder. FIGS. 7 and 8 are a perspective view showing the relationship between the lower thread control member and the lower thread control member; Figure 9 is a diagram showing the relationship between the stitch crossing position and needle thread tension, and Figures 10, 11, and 12 are diagrams of the second embodiment, the third embodiment, and the fourth embodiment of the present invention, respectively. It is a perspective view showing the main parts of the bobbin thread pull-out adjustment device. In the figure, (2) is the bobbin thread, (7) is the needle thread tension adjustment device, and (8) is the bobbin thread tension adjustment device.
) is a bobbin thread drawer adjustment device, (2) is a pattern selection dial which is an example of an operating member, the ring is a thread tension plate, (32) (33)
(38) is a feed tooth which is an example of a bobbin thread pull-out member, (39) is a bobbin thread control member, and (56) is a horizontal shuttle which is a part of the hook mechanism. Patent applicant Janome Sewing Machine Industry Co., Ltd. Inventor
Susumu Hanyu 5th plan Figure 9 Figure 6 Figure 7 Figure 8
Claims (1)
、出し部材を設けた本縫ミシンにおいて、前記下糸引出
し部材の下糸引出し量を制御する下糸制御部材を操作部
材に連動して作動させる下糸引出し調節装置と、一対の
糸調子皿に上糸張力を付与する一組の糸調子ばねの一方
を前記操作部材に連動して作動と不作動の状i1に切シ
替えることができる上糸張力調節装置とを設けたことを
特徴とする本縫ミシンにおける縫目調節装置。In a lockstitch sewing machine equipped with a bobbin thread pull-out member on the bobbin thread side that pulls out the bobbin thread for each stitch, the bobbin thread control member that controls the amount of bobbin thread pulled out by the bobbin thread pull-out member is linked to the operating member. A lower thread pull-out adjustment device that is operated by the operation member and one of a pair of thread tension springs that apply upper thread tension to a pair of thread tension discs are switched between an activated state and an inactive state i1 in conjunction with the operating member. 1. A stitch adjustment device for a lockstitch sewing machine, characterized in that a needle thread tension adjustment device is provided.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14557981A JPS5846987A (en) | 1981-09-17 | 1981-09-17 | Stitch adjusting apparatus in main stitch seweing machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14557981A JPS5846987A (en) | 1981-09-17 | 1981-09-17 | Stitch adjusting apparatus in main stitch seweing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5846987A true JPS5846987A (en) | 1983-03-18 |
JPH0228353B2 JPH0228353B2 (en) | 1990-06-22 |
Family
ID=15388355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14557981A Granted JPS5846987A (en) | 1981-09-17 | 1981-09-17 | Stitch adjusting apparatus in main stitch seweing machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5846987A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6268486A (en) * | 1985-09-20 | 1987-03-28 | ジャガー株式会社 | Bobbin thread slackening mechanism of zigzag sewing machine |
JPS6274399A (en) * | 1985-09-27 | 1987-04-06 | 蛇の目ミシン工業株式会社 | Bobbin thread path altering apparatus of sewing machine |
JPS63233169A (en) * | 1987-03-18 | 1988-09-28 | 日精株式会社 | Multilayer horizontal recirculation type parking equipment |
JP2014161462A (en) * | 2013-02-25 | 2014-09-08 | Yuho Sewing Machine Co Ltd | Bobbin thread delivery device for sewing apparatus |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS419542Y1 (en) * | 1964-06-08 | 1966-05-09 |
-
1981
- 1981-09-17 JP JP14557981A patent/JPS5846987A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS419542Y1 (en) * | 1964-06-08 | 1966-05-09 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6268486A (en) * | 1985-09-20 | 1987-03-28 | ジャガー株式会社 | Bobbin thread slackening mechanism of zigzag sewing machine |
JPS6274399A (en) * | 1985-09-27 | 1987-04-06 | 蛇の目ミシン工業株式会社 | Bobbin thread path altering apparatus of sewing machine |
JPS63233169A (en) * | 1987-03-18 | 1988-09-28 | 日精株式会社 | Multilayer horizontal recirculation type parking equipment |
JPH044429B2 (en) * | 1987-03-18 | 1992-01-28 | ||
JP2014161462A (en) * | 2013-02-25 | 2014-09-08 | Yuho Sewing Machine Co Ltd | Bobbin thread delivery device for sewing apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH0228353B2 (en) | 1990-06-22 |
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