JP2000218071A - Multi-needle multi-thread chain stitch sewing machine - Google Patents
Multi-needle multi-thread chain stitch sewing machineInfo
- Publication number
- JP2000218071A JP2000218071A JP11022496A JP2249699A JP2000218071A JP 2000218071 A JP2000218071 A JP 2000218071A JP 11022496 A JP11022496 A JP 11022496A JP 2249699 A JP2249699 A JP 2249699A JP 2000218071 A JP2000218071 A JP 2000218071A
- Authority
- JP
- Japan
- Prior art keywords
- needle
- thread
- looper
- sewing machine
- cam surface
- 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
Landscapes
- Sewing Machines And Sewing (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、多本針二重環縫いミシ
ンに関するもので、特に、薄く腰のない生地に良好な二
重環縫い目を形成できる２本針または３本針二重環縫い
ミシンに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-needle double chain stitch sewing machine, and more particularly to a two-needle or three-needle double chain stitch capable of forming a good double-ring stitch on a thin and stiff fabric. The present invention relates to a sewing machine.
【０００２】[0002]
【従来の技術】図１０に示すような２本の針１，２を有
する従来の多本針二重環縫いミシンは、左右に並列して
配置され右針２の針下端が左針１の針下端より高く針棒
下端に固定された２本の針１，２と、右側から各針に向
かって進退するルーパ３とを備える。図９に示すように
二重環縫目Ｓは、ルーパ３に掛けられてループ状となる
左針糸４Ｌ及び針糸５Ｌと生地（図示を省略）からルー
パ目孔３ｅを経てルーパ３に沿うルーパ糸６とによる糸
三角形に左針１と右針２がそれぞれ降下し、下死点を経
て上昇するとともにルーパ３が後退し右死点を経て前進
して各針に形成された新たな針糸ループをすくうように
して構成されている。2. Description of the Related Art A conventional multi-needle double chain stitch sewing machine having two needles 1 and 2 as shown in FIG. There are provided two needles 1 and 2 fixed to the lower end of the needle bar higher than the lower end of the needle, and a looper 3 which advances and retreats from the right side toward each needle. As shown in FIG. 9, the double chain stitch S extends from the left needle thread 4 </ b> L and the needle thread 5 </ b> L and the cloth (not shown), which are looped over the looper 3, and along the looper 3 through the looper eye hole 3 e. The left needle 1 and the right needle 2 respectively descend in the thread triangle formed by the looper thread 6, rise through the bottom dead center, and the looper 3 retreats and advances through the right dead center to form new needles formed on each needle. It is configured to scoop the yarn loop.
【０００３】上記構成の二重環縫いミシンで生地に二重
環縫い目Ｓを形成させるために、従来より各針１，２と
糸調子器群７ａ，７ｂ、７ｃとの針糸経路間に針糸制御
機構８が配置されている（図１０）。この針糸制御機構
８は、針棒１ａの上端に固定された針棒糸道９と、ミシ
ンアームＡに固定された針糸道ホルダー１０と、揺動軸
１１に一方端を固定し他方の自由端に通し孔１２ａ，１
２ｂを備え揺動軸１１を中心に揺動する針糸捌キ１２と
からなる。針棒糸道９は針棒１ａの上端を起点として前
記ミシンの生地送り方向Ｆと反対方向に延びており、そ
の先端部に複数個の糸道孔９ａ，９ｂを備える。針棒糸
道９は針棒１ａの昇降運動に連動して昇降動する。針糸
道ホルダー１０は左右の針糸４，５を個別に案内するた
めの複数個の針糸道１０ａ，１０ｂを備え、各針糸道は
それぞれ上下に位置調節可能に針糸道ホルダー１０に固
定され、右針糸道１０ｂは左針糸道１０ａより高く設定
されている。また、針糸道ホルダー１０は、長孔１０ｈ
およびネジ１３を介して上下位置を調節可能に固定で
き、これにより各針糸道１０ａ，１０ｂの上下位置を一
括して調節できる。揺動軸１１は針棒１ａの昇降運動に
連動して揺動する。針糸捌キ１２は左右の針糸４，５を
個別に案内するよう複数個の通し孔１２ａ，１２ｂにそ
れぞれ通している。糸調子器群７は、左右の針糸４，５
用に配置された糸調子器７ａ，７ｂと、ルーパ糸６用の
配置された糸調子器７ｃとからなり、対応する糸に張力
を付与するものである。In order to form a double chain stitch S on a fabric with the double chain stitch machine having the above-described structure, a needle is conventionally provided between the needles 1, 2 and the needle thread paths between the thread tensioner groups 7a, 7b, 7c. A yarn control mechanism 8 is provided (FIG. 10). The needle thread control mechanism 8 includes a needle bar thread path 9 fixed to the upper end of the needle bar 1a, a needle thread path holder 10 fixed to the sewing machine arm A, and one end fixed to the swing shaft 11 and the other end. Through holes 12a, 1 in free end
2b, which comprises a needle thread handling key 12 swinging about a swing shaft 11. The needle bar thread path 9 extends from the upper end of the needle bar 1a in a direction opposite to the cloth feeding direction F of the sewing machine, and has a plurality of thread path holes 9a and 9b at its tip. The needle bar thread path 9 moves up and down in conjunction with the up and down movement of the needle bar 1a. The needle thread path holder 10 is provided with a plurality of needle thread paths 10a and 10b for individually guiding the left and right needle threads 4 and 5, and each of the needle thread paths is vertically adjustable to the needle thread path holder 10. The right needle thread path 10b is fixed higher than the left needle thread path 10a. In addition, the needle thread path holder 10 has a long hole 10h.
The vertical position can be adjusted and fixed via the screw 13 and the vertical position of each of the needle thread paths 10a and 10b can be adjusted collectively. The swing shaft 11 swings in conjunction with the vertical movement of the needle bar 1a. The needle thread handling key 12 passes through a plurality of through holes 12a and 12b so as to guide the left and right needle threads 4 and 5 individually. The thread tension controller group 7 includes left and right needle threads 4 and 5
Thread tensioners 7a and 7b arranged for the looper thread 6 and a thread tensioner 7c arranged for the looper thread 6 for applying tension to the corresponding thread.
【０００４】図１１は図１０におけるミシンの針１，２
と針糸道１０ａ，１０ｂとの針糸経路間で制御された各
針糸４，５の糸捌き量を示している。図中、縦軸Ｅは各
針糸４，５の糸捌き量（ｍｍ）を表し、横軸Ａはミシン
主軸Ｍの１回転分、すなわち、一縫い目形成過程分に相
当する角度の３６０度を表している。ミシン主軸Ｍは、
角度が０゜のとき、左右の針が各自の上死点となるよう
に構成されている。尚、ミシン主軸Ｍの角度が９０゜付
近において左側の針１が前記糸三角形に降下し、ミシン
主軸Ｍの角度が１２０゜付近において右側の針２が前記
糸三角形に降下する。また、ミシン主軸Ｍの角度が２１
０゜付近においてルーパ３が右針２に形成された新たな
針糸ループをすくい、ミシン主軸Ｍの角度が２４０゜付
近においてルーパ３が左針１に形成された新たな針糸ル
ープをすくう。左針糸４の糸捌き量は１０゜付近から増
加し初め１８０゜付近で最大になり、３３０゜付近でゼ
ロになっている。右針糸５の糸捌き量は２０゜付近から
増加し初め１７０゜付近から２１０゜付近の間最大を維
持し３４０゜付近でゼロになっている。ミシン主軸Ｍの
角度５０゜付近から３４０゜付近の間において、右針糸
の糸捌き量は左針糸の糸捌き量を上回っている。FIG. 11 shows sewing needles 1 and 2 in FIG.
4 shows the thread release amounts of the respective needle threads 4 and 5 controlled between the needle thread paths of the needle thread paths 10a and 10b. In the drawing, the vertical axis E represents the thread handling amount (mm) of each of the needle threads 4 and 5, and the horizontal axis A represents 360 degrees of an angle corresponding to one rotation of the main shaft M of the sewing machine, that is, one stitch forming process. Represents. The sewing machine spindle M is
When the angle is 0 °, the left and right hands are configured to be the respective top dead centers. When the angle of the sewing machine main axis M is around 90 °, the left needle 1 descends to the thread triangle, and when the angle of the sewing machine main axis M is around 120 °, the right needle 2 descends to the thread triangle. The angle of the main shaft M of the sewing machine is 21
The looper 3 scoops a new needle thread loop formed on the right needle 2 near 0 °, and the looper 3 scoops a new needle thread loop formed on the left needle 1 when the angle of the sewing machine main shaft M is around 240 °. The thread handling amount of the left needle thread 4 increases from around 10 °, reaches a maximum at around 180 °, and becomes zero at around 330 °. The amount of threading of the right needle thread 5 increases from around 20 °, starts at around 170 ° to around 210 °, and reaches zero at around 340 °. Between about 50 ° and 340 ° of the angle of the sewing machine spindle M, the thread handling amount of the right needle thread exceeds the thread handling quantity of the left needle thread.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記のような
従来の装置では、図１１に示すように、ミシン主軸の角
度が２４０゜以降、すなわち、針が下死点を経て上昇す
るとともにルーパが前進して右針糸ループをすくった時
点から上死点までの糸緩みが十分でなく、針からルーパ
の腹部を経て生地に伸びるループ状の右針糸量が少なく
なる。従って、生地からルーパの目孔に連なるルーパ糸
をループ状右針糸によってルーパの腹部に沿わせること
になる。その結果、ループ状右針糸とルーパ糸とで形成
される糸三角形中に右針が降下しない、いわゆる、「帰
りの目飛び」が起きてしまうという懸念があった。However, in the conventional apparatus as described above, as shown in FIG. 11, the angle of the main shaft of the sewing machine is 240 ° or more, that is, the needle rises through the bottom dead center and the looper is moved. The slack from the point of scooping the right needle thread loop to the top dead center is not sufficient, and the amount of loop-shaped right needle thread extending from the needle to the fabric through the abdomen of the looper is reduced. Therefore, the looper thread extending from the cloth to the eye of the looper is made to follow the abdomen of the looper by the loop-shaped right needle thread. As a result, there is a concern that the so-called “return skip” may occur, in which the right needle does not drop in the thread triangle formed by the loop-shaped right needle thread and the looper thread.
【０００６】従って、本発明の目的は、上記のような問
題を簡単な構成で解決し確実に二重環縫い目を形成でき
る多本針二重環縫いミシンを提供することにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a multi-needle double chain stitch sewing machine capable of solving the above-mentioned problems with a simple structure and forming double chain stitches reliably.
【０００７】[0007]
【課題を解決するための手段】本発明の請求項１に係る
装置は、上記目的を達成するために、針棒下端に左右に
並列して配置され、右の針下端が左の針下端より高く針
棒下端に固定された少なくとも２本の針と、右側から各
針に向かって進退するルーパとを備え、該針とルーパが
協働してルーパに掛けられてループ状となる針糸と生地
からルーパ目孔を経てルーパに沿うルーパ糸とによる糸
三角形を形成した後、生地に二重環縫い目を形成する多
本針二重環縫いミシンにおいて、針棒上端に固定され複
数個の糸通し孔を対向して設けた一対の糸案内と、ミシ
ン機枠に固定され一対の糸案内間を二方向に横切って連
続するカム面を形成した糸捌きとを備え、前記針棒の降
下に伴って前記針が前記糸三角形に降下したときに一対
の糸案内間の針糸が一方のカム面に係合し、下死点を経
て針が上昇するとともにルーパが前進して針糸ループを
すくうまで他方のカム面との係合を維持しその後に両方
のカム面への係合を順次解除するようにしたことを特徴
とするものである。In order to achieve the above object, the apparatus according to the first aspect of the present invention is arranged in parallel with the lower end of the needle bar so that the lower end of the right needle is lower than the lower end of the left needle. A needle thread having at least two needles fixed to the lower end of the needle bar high, and a looper moving forward and backward from the right side toward each needle, wherein the needle and the looper cooperate to be hooked on the looper to form a loop-shaped needle thread; In a multi-needle double chain stitch sewing machine that forms a double chain stitch on the fabric after forming a thread triangle with the looper thread along the looper through the looper eye hole from the fabric, a plurality of threads fixed to the upper end of the needle bar A pair of thread guides provided with through holes opposed to each other, and a thread handling fixed to the sewing machine frame to form a continuous cam surface across the pair of thread guides in two directions. The needle thread between the pair of thread guides when the needle descends to the thread triangle accordingly Engage with one cam surface and maintain engagement with the other cam surface until the needle rises through bottom dead center and the looper advances to scoop the needle thread loop, and then engages both cam surfaces. The combination is sequentially released.
【０００８】請求項２に係る装置は、一方のカム面によ
る針糸の係合解除が最も右側の針に挿通された針糸から
行われていることを特徴とするものである。According to a second aspect of the present invention, the disengagement of the needle thread by one of the cam surfaces is performed from the needle thread inserted through the rightmost needle.
【０００９】請求項３に係る装置は、他方のカム面への
係合時における前記糸案内間の各針糸の経路長は右側の
針に挿通された針糸ほど長くなされていることを特徴と
するものである。According to a third aspect of the present invention, the path length of each needle thread between the thread guides at the time of engagement with the other cam surface is longer as the needle thread inserted through the right needle. It is assumed that.
【００１０】[0010]
【作用】本発明の請求項１によれば、前記針棒の降下に
伴って前記針が前記糸三角形に降下したときに一対の糸
案内間の各針糸が前記一方のカム面に順次係合する。そ
して、下死点を経て上昇する針とともにルーパが前進し
て針糸ループをすくうまで前記他方のカム面との係合を
維持した後に前記両方のカム面への係合を順次解除す
る。解除後の各針糸は急激に弛められ、ルーパに掛けら
れてループ状となる各針糸は生地からルーパ目孔へ連な
るルーパ糸をルーパに沿わせない。According to the first aspect of the present invention, each needle thread between the pair of thread guides is sequentially engaged with the one cam surface when the needle descends into the thread triangular shape as the needle bar descends. Combine. Then, the engagement with the two cam surfaces is sequentially released after maintaining the engagement with the other cam surface until the looper advances with the needle rising through the bottom dead center and scoops the needle thread loop. After release, each needle thread is rapidly loosened, and the loop-shaped needle thread is hung on the looper so that the looper thread extending from the fabric to the looper eye does not follow the looper.
【００１１】本発明の請求項２によれば、前記糸三角形
における各針糸への係合解除が最も右側のループ状の針
糸から行われることとなる。According to the second aspect of the present invention, the disengagement of the triangular thread from each needle thread is performed from the rightmost loop-shaped needle thread.
【００１２】本発明の請求項３によれば、縫目中におけ
る右針糸の比率が多くなる。According to the third aspect of the present invention, the ratio of the right needle thread in the stitch increases.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて説明するが、従来ミシンと共通する部分につ
いてはその説明を省略する。図１は本発明に係る２本針
二重環縫いミシンの全体斜視図である。針棒１ａの上端
には一対の針棒糸道１４，１４（一対の糸案内）が固定
されている。一対の針棒糸道１４，１４は前記ミシンの
生地送り方向Ｆと反対方向に延び且つその先端部が上方
に曲げられている。上方に曲げられた針棒糸道１４，１
４の先端部には左針糸用の糸道孔１４ａ，１４ａおよび
右針糸用の糸道孔１４ｂ，１４ｂが対向する部分に配置
されている。図２に示すように、両糸通し孔１４ａ，１
４ｂは前記生地送り方向Ｆに対して前上がりとなる方向
に沿っており、針棒１ａの昇降方向と交差する方向に沿
っている。左針糸用の糸道孔１４ａ，１４ａは右針糸用
の糸道孔１４ｂ，１４ｂよりも低く且つ生地送り方向Ｆ
の後方側に設定されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings, but description of parts common to conventional sewing machines will be omitted. FIG. 1 is an overall perspective view of a two-needle double chain stitch sewing machine according to the present invention. A pair of needle bar thread paths 14, 14 (a pair of thread guides) are fixed to the upper end of the needle bar 1a. The pair of needle bar thread paths 14 and 14 extend in a direction opposite to the fabric feeding direction F of the sewing machine, and the tips thereof are bent upward. Needle bar thread path 14, 1 bent upward
At the tip of 4, a thread path hole 14a, 14a for left needle thread and a thread path hole 14b, 14b for right needle thread are arranged at opposing portions. As shown in FIG. 2, both threading holes 14a, 1
Reference numeral 4b is along a direction that rises forward with respect to the fabric feeding direction F, and is along a direction that intersects with the vertical direction of the needle bar 1a. The thread path holes 14a, 14a for the left needle thread are lower than the thread path holes 14b, 14b for the right needle thread, and the fabric feeding direction F
Is set on the rear side.
【００１４】ミシン機枠の一部を構成するミシンアーム
Ａには針棒１ａの昇降時に前記針棒糸道１４，１４間の
各針糸に係合する糸捌き１５が配置されている。この糸
捌き１５は、前記生地送り方向Ｆに対して前上がりとな
る方向に沿って延びる第１カム１５ａと、針棒１ａの昇
降方向に沿って延びる第２カム１５ｂとを形成してい
る。第１カム１５ａは前記針棒糸道１４，１４の両糸道
孔の間を横切るように第１長孔１６とネジ１７によりブ
ラケット１８に固定される。ブラケット１８は第２長孔
１９とネジ２０とを介してミシンアームＡに固定され
る。ブラケット１８の第２長孔１９とネジ２０とによ
り、糸捌き１５は針棒１ａの昇降方向に沿って上下に固
定位置を変更でき、針棒糸道１４，１４間の各針糸４，
５との係合タイミングを調節できる。ブラケット１８の
第１長孔１６とネジ１７とにより、糸捌き１５は前記生
地送り方向Ｆに沿って前後に固定位置を変更でき、糸道
孔間の各針糸４，５の経路長を調節できる。左右の針糸
道１０ａ，１０ｂはほぼ同じ高さに設定されている。On the sewing machine arm A which constitutes a part of the sewing machine frame, there is arranged a thread separating device 15 which engages with each needle thread between the needle bar thread paths 14 when the needle bar 1a is moved up and down. The thread separating device 15 forms a first cam 15a extending along a direction that rises forward with respect to the fabric feeding direction F, and a second cam 15b extending along a direction in which the needle bar 1a moves up and down. The first cam 15a is fixed to a bracket 18 by a first slot 16 and a screw 17 so as to cross between the two thread passage holes of the needle bar thread passages 14,14. The bracket 18 is fixed to the sewing machine arm A via the second slot 19 and the screw 20. The second slot 19 of the bracket 18 and the screw 20 allow the thread handler 15 to change its fixed position up and down along the direction in which the needle bar 1a moves up and down.
5 can be adjusted. The first slot 16 of the bracket 18 and the screw 17 allow the thread handling 15 to change the fixed position in the back and forth direction along the fabric feeding direction F, and adjust the path length of each needle thread 4 and 5 between the thread path holes. it can. The left and right needle thread paths 10a and 10b are set at substantially the same height.
【００１５】左針用の針糸４は図示しない糸供給源から
糸調子器群の糸調子器７ａ、針糸ホルダーの針糸道１０
ａ、針糸捌キの通し孔１２ａ、針棒糸道の糸道孔１４
ａ，１４ａを経て左針１の目孔に通され、右針用の針糸
５は図示しない糸供給源から糸調子器の糸調子器７ｂ、
針糸ホルダーの針糸道１０ｂ、針糸捌キの通し孔１２
ｂ、針棒糸道の糸道孔１４ｂ，１４ｂを経て右針２の目
孔に通される。The needle thread 4 for the left needle is supplied from a thread supply source (not shown) from a thread tensioner 7a of a thread tensioner group and a needle thread path 10 of a needle thread holder.
a, a through hole 12a for a needle thread handling key, a thread path hole 14 for a needle bar thread path
a and 14a are passed through the eye of the left needle 1, and the needle thread 5 for the right needle is supplied from a thread source (not shown) to a thread tensioner 7b of a thread tensioner.
Needle thread path 10b of needle thread holder, through hole 12 of needle thread handling key
b, the thread is passed through the eye hole of the right needle 2 through the thread path holes 14b, 14b of the needle bar thread path.
【００１６】次に、上記のように構成された本発明の２
本針二重環縫いミシンについて、図２ないし図８に基づ
いてその作用を説明する。図８に示すように、ミシン主
軸Ｍの角度が０゜、すなわち、針棒１ａが上死点のと
き、一対の針棒糸道１４，１４の各糸道孔に挿通された
各針糸４，５は糸捌き１５の第１カム１５ａに係合して
おらず上方に位置している（図２）。針棒１ａの降下に
伴って、各針糸４，５の糸捌き量とも２０゜付近からほ
ぼ同じように上昇し始める。ミシン主軸Ｍの角度が９０
゜付近に到達すると、まず、ルーパ３に掛けられてルー
プ状となる針糸４Ｌと生地からルーパ目孔３ｅを経てル
ーパ３に沿うルーパ糸６とで形成された糸三角形に左針
１先端が到達する（図９参照）。この時、図３に示すよ
うに、左針用の糸道孔１４ａ，１４ａ間に挿通された左
針糸４が糸捌き１５の第１カム１５ａに係合する。Next, the second embodiment of the present invention constructed as described above is described.
The operation of the double needle stitch sewing machine will be described with reference to FIGS. As shown in FIG. 8, when the angle of the main shaft M of the sewing machine is 0 °, that is, when the needle bar 1a is at the top dead center, each needle thread 4 inserted through each thread hole of the pair of needle bar thread paths 14 and 14 is formed. , 5 are not engaged with the first cam 15a of the thread handling 15, and are located above (FIG. 2). With the lowering of the needle bar 1a, the thread handling amount of each of the needle threads 4 and 5 starts to rise almost in the same manner from around 20 °. The angle of the sewing machine spindle M is 90
When the vicinity of ゜ is reached, first, the tip of the left needle 1 is formed into a thread triangle formed by the needle thread 4L which is hung on the looper 3 to form a loop and the looper thread 6 along the looper 3 from the fabric through the looper eye 3e. (See FIG. 9). At this time, as shown in FIG. 3, the left needle thread 4 inserted between the left needle thread path holes 14a, 14a engages with the first cam 15a of the thread handling unit 15.
【００１７】引き続き、針棒１ａが更に降下し、ミシン
主軸Ｍの角度が１２０゜付近に到達すると、ルーパ３に
掛けられてループ状となる針糸５Ｌと生地からルーパ目
孔３ｅを経てルーパ３に沿うルーパ糸６とで形成された
糸三角形の針糸４Ｌと針糸５Ｌとの間に右針２が到達す
る（図９参照）。この時、図４に示すように、右針用の
糸道孔１４ｂ，１４ｂ間に挿通された右針糸５が糸捌き
１５の第１カム１５ａに係合する。針棒１ａの更なる降
下によって、ミシン主軸Ｍの角度が１３０゜付近に到達
すると左針糸の糸捌き量は最大になり、ミシン主軸Ｍの
角度が１７０゜付近に到達すると右針糸の糸捌き量は最
大になる。第１カム１５ａに係合された各糸道孔間の針
糸４，５はこの時期に第２カム１５ｂへスライドされ、
その係合状態が維持される（図５）。この係合状態にお
いて、糸道孔１４ｂ，１４ｂ間の針糸５の経路長は糸道
孔１４ａ，１４ａ間の針糸４の経路長よりも長くなって
いる。Subsequently, when the needle bar 1a further descends and the angle of the main shaft M of the sewing machine reaches about 120 °, the looped needle thread 5L is wound on the looper 3 and the cloth is passed through the looper eye 3e through the looper eye 3e. The right needle 2 reaches between the triangular needle thread 4L and the needle thread 5L formed by the looper thread 6 along the line (see FIG. 9). At this time, the right needle thread 5 inserted between the thread paths 14b for the right needle engages with the first cam 15a of the thread handling 15, as shown in FIG. When the angle of the sewing machine main shaft M reaches about 130 ° due to the further lowering of the needle bar 1a, the amount of thread separation of the left needle thread becomes maximum, and when the angle of the sewing machine main shaft M reaches about 170 °, the thread of the right needle thread becomes large. The amount of handling is maximized. The needle threads 4 and 5 between the thread holes engaged with the first cam 15a are slid to the second cam 15b at this time,
The engaged state is maintained (FIG. 5). In this engaged state, the path length of the needle thread 5 between the thread path holes 14b, 14b is longer than the path length of the needle thread 4 between the thread path holes 14a, 14a.
【００１８】針棒１ａ下端に固定された針１，２が下死
点を経て上昇し、ミシン主軸Ｍの角度が２１０゜付近に
到達すると、まず、右針２の上昇とともにルーパ３が前
進して右針２に形成された新たな針糸ループをすくう。
引き続き、針棒１ａが上昇し、ミシン主軸Ｍの角度が２
４０゜付近に到達すると、左針１の上昇とともにルーパ
３が前進して左針１に形成された新たな針糸ループをす
くう。これらの間において第２カム１５ｂに係合された
針棒糸道１４，１４間の各針糸４，５が第１カム１５ａ
へスライドする（図６）。右針糸の糸捌き量は、ミシン
主軸Ｍの角度が２００゜付近に到達まで最大を維持し、
その後、急激減少してゆき、左針糸の糸捌き量は、ミシ
ン主軸Ｍの角度が２３０゜付近に到達まで最大を維持
し、その後、減少していく。針１，２が下死点を経て上
昇し、ルーパ３が針１，２に形成された新たな針糸ルー
プをすくうまで、糸捌き１５のカムに各針糸４，５を係
合させているので、その針糸ループが捩れない。これは
ルーパ３に針糸ループを確実にすくわせるのに有効であ
る。When the needles 1 and 2 fixed to the lower end of the needle bar 1a move up through the bottom dead center and the angle of the main shaft M of the sewing machine approaches 210 °, first, the looper 3 moves forward with the right needle 2 rising. The new needle thread loop formed on the right needle 2 is scooped.
Subsequently, the needle bar 1a is raised, and the angle of the
When it reaches about 40 °, the looper 3 moves forward with the rise of the left needle 1 and scoops a new needle thread loop formed on the left needle 1. Between these, the needle threads 4, 5 between the needle bar thread paths 14, 14 engaged with the second cam 15b are connected to the first cam 15a.
(Fig. 6). The thread handling amount of the right needle thread maintains the maximum until the angle of the sewing machine main shaft M reaches about 200 °,
Thereafter, the thread amount of the left needle thread keeps its maximum until the angle of the main shaft M of the sewing machine reaches about 230 °, and then decreases. The needle threads 4 and 5 are engaged with the cam of the thread handling 15 until the needles 1 and 2 rise through the bottom dead center and the looper 3 scoops a new needle thread loop formed on the needles 1 and 2. So that the needle thread loop does not twist. This is effective in ensuring that the looper 3 squeezes the needle thread loop.
【００１９】ルーパ３が両針１，２に形成された針糸ル
ープをすくった後、第１カム１５ａに係合された糸道孔
１４ｂ，１４ｂ間の針糸５が係合解除され（図７）、そ
の後、第１カム１５ａに係合された糸道孔１４ａ，１４
ａ間の針糸４が係合解除される。これらの係合解除によ
り、生地からルーパ目孔３ｅに連なるルーパ糸６がルー
パ３の腹部に沿わなくなり、その結果、前記糸三角形が
安定的に形成できる。また、各針糸４，５が糸捌き１５
の第２カム１５ｂに係合している状態において右糸道孔
間の針糸の経路長が左針用のものよりも長くなるので、
その係合状態が解除された後に右側のループ状の針糸の
弛み度合が左側のものよりも多くなる。その結果、縫目
中における右針糸の比率が多くなって全体的に伸びのあ
る二重環縫い目を形成することができる。糸捌き１５に
おけるカム１５ａ，１５ｂの作用により、ミシン主軸Ｍ
の角度１４０゜付近から２２０゜付近の間において、右
針糸の糸捌き量は左針糸の糸捌き量を上回り、それ以外
の間は、双方ともほぼ同量の糸捌き量となる。After the looper 3 scoops the needle thread loops formed on the needles 1 and 2, the needle thread 5 between the thread passage holes 14b and 14b engaged with the first cam 15a is disengaged (see FIG. 2). 7) After that, the thread path holes 14a, 14 engaged with the first cam 15a
The needle thread 4 between a is disengaged. By releasing these engagements, the looper thread 6 continuing from the fabric to the looper eye hole 3e does not follow the abdomen of the looper 3, and as a result, the thread triangle can be formed stably. In addition, each needle thread 4 and 5 is threaded 15
Since the path length of the needle thread between the right thread path holes is longer than that for the left needle in a state where the second thread is engaged with the second cam 15b,
After the engagement is released, the slack degree of the right loop-shaped needle thread becomes larger than that of the left loop thread. As a result, the ratio of the right needle thread in the seam is increased, and a double-ringed seam that is entirely elongated can be formed. By the action of the cams 15a and 15b in the thread handling 15, the sewing machine spindle M
Between about 140 ° and about 220 °, the thread handling amount of the right needle thread exceeds the thread handling amount of the left needle thread, and otherwise, both thread threads have substantially the same thread handling quantity.
【００２０】図１０の従来のミシンと図１の本発明を実
施したミシンで縫った場合における各糸量の比較を以下
の表１に示す。Table 1 below shows a comparison of thread amounts when sewing is performed with the conventional sewing machine shown in FIG. 10 and the sewing machine according to the present invention shown in FIG.
【００２１】[0021]
【表１】 [Table 1]
【００２２】[0022]
【発明の効果】以上のように、本発明によれば、下死点
からの針の上昇時に、針からルーパの腹部を経て生地に
伸びるループ状の針糸によって、生地からルーパの目孔
に連なるルーパ糸がルーパに沿うことがなくなるので、
確実に前記糸三角形を形成して二重環縫い目を形成でき
るという効果を奏する。また、下死点からの針の上昇時
に、針に形成される針糸ループに捩れが生じないので、
針糸ループをルーパで確実にすくうことができる。As described above, according to the present invention, when the needle rises from the bottom dead center, the loop-shaped needle thread extending from the needle to the cloth through the abdomen of the looper allows the cloth to be inserted into the eye of the looper. Since the continuous looper thread does not follow the looper,
There is an effect that the thread triangle can be surely formed to form a double ring seam. Also, when the needle is lifted from the bottom dead center, no twist occurs in the needle thread loop formed on the needle,
The needle thread loop can be reliably scooped with a looper.
【００２３】請求項２によれば、前記糸三角形における
各針糸への係合解除が右側のループ状針糸から行われる
ので、前記糸三角形の形成をより確実に行うことができ
る。According to the second aspect, the disengagement of the thread triangle from each needle thread is performed from the right loop needle thread, so that the thread triangle can be formed more reliably.
【００２４】請求項３によれば、縫目中における右針糸
の比率が多くなるので、全体的に伸びのある二重環縫い
目を形成できる。According to the third aspect, the ratio of the right needle thread in the seam is increased, so that a double ring seam that is entirely elongated can be formed.
【図１】本発明に適用される多本針二重環縫いミシンの
外観斜視図である。FIG. 1 is an external perspective view of a multi-needle double chain stitch sewing machine applied to the present invention.
【図２】同上ミシンの要部説明図である。FIG. 2 is an explanatory view of a main part of the sewing machine.
【図３】同上ミシンの要部説明図である。FIG. 3 is an explanatory diagram of a main part of the sewing machine.
【図４】同上ミシンの要部説明図である。FIG. 4 is an explanatory diagram of a main part of the sewing machine.
【図５】同上ミシンの要部説明図である。FIG. 5 is an explanatory view of a main part of the sewing machine.
【図６】同上ミシンの要部説明図である。FIG. 6 is an explanatory diagram of a main part of the sewing machine.
【図７】同上ミシンの要部説明図である。FIG. 7 is an explanatory view of a main part of the sewing machine.
【図８】同上ミシンの各針糸の糸捌き量を説明する図で
ある。FIG. 8 is a diagram illustrating a thread handling amount of each needle thread of the sewing machine.
【図９】従来の２本針二重環縫いミシンによって形成さ
れるシームの構成図である。FIG. 9 is a configuration diagram of a seam formed by a conventional two-needle double chain stitch sewing machine.
【図１０】従来の多本針二重環縫いミシンの外観斜視図
である。FIG. 10 is an external perspective view of a conventional multi-needle double chain stitch sewing machine.
【図１１】従来の多本針二重環縫いミシンの各針糸の糸
捌き量を説明する図である。FIG. 11 is a diagram illustrating a thread handling amount of each needle thread of a conventional multi-needle double chain stitch sewing machine.
１，２ 左右の針（複数本の針） １ａ 針棒 ３ ルーパ ３ｅ ルーパ目孔 ４ 左針用の針糸 ４Ｌ ループ状針糸 ５ 右針用の針糸 ５Ｌ ループ状針糸 ６ ルーパ糸 ７ 糸調子器（複数の糸調子器） １４，１４ 一対の針棒糸道（一対の糸案内） １４ａ，１４ｂ 糸道孔（糸通し孔） １５ 糸捌き １５ａ 第１カム Ｍ 主軸（ミシン主軸） Ｓ 二重環縫い目 1, left and right needles (multiple needles) 1a needle bar 3 looper 3e looper eye 4 needle thread for left needle 4L loop needle thread 5 needle thread for right needle 5L loop needle thread 6 looper thread 7 thread Tensioner (plurality of thread tensioners) 14, 14 A pair of needle bar thread paths (a pair of thread guides) 14a, 14b A thread path hole (a threading hole) 15 A thread breaker 15a A first cam M Main shaft (sewing machine main shaft) S2 Heavy ring seam
Claims (3)
の針下端が左の針下端より高く針棒下端に固定された少
なくとも２本の針と、右側から各針に向かって進退する
ルーパとを備え、該針とルーパが協働してルーパに掛け
られてループ状となる針糸と生地からルーパ目孔を経て
ルーパに沿うルーパ糸とによる糸三角形を形成した後、
生地に二重環縫い目を形成する多本針二重環縫いミシン
において、針棒上端に固定され複数個の糸通し孔を対向
して設けた一対の糸案内と、ミシン機枠に固定され一対
の糸案内間を二方向に横切って連続するカム面を形成し
た糸捌きとを備え、前記針棒の降下に伴って前記針が前
記糸三角形に降下したときに一対の糸案内間の針糸が一
方のカム面に係合し、下死点を経て針が上昇するととも
にルーパが前進して針糸ループをすくうまで他方のカム
面との係合を維持しその後に両方のカム面への係合を順
次解除するようにしたことを特徴とする多本針二重環縫
いミシン。1. At least two needles which are arranged side by side at the lower end of a needle bar, the lower end of a right needle is higher than the lower end of a left needle, and is fixed to the lower end of the needle bar. After forming a thread triangle formed by the needle and the looper, the needle thread and the looper cooperate with each other to be looped by the looper and the looper thread along the looper from the fabric through the looper eye hole,
In a multi-needle double chain stitch sewing machine forming a double chain stitch on a fabric, a pair of thread guides fixed to the upper end of a needle bar and provided with a plurality of threading holes facing each other, and a pair of thread guides fixed to a sewing machine frame. A threading surface which forms a continuous cam surface across the two thread guides in two directions, and the needle thread between the pair of thread guides when the needle descends into the thread triangle with the needle bar descending Engages with one cam surface, maintains the engagement with the other cam surface until the needle ascends through the bottom dead center and the looper advances to scoop the needle thread loop, and then engages with both cam surfaces. A multi-needle double chain stitch sewing machine characterized in that engagement is sequentially released.
も右側の針に挿通された針糸から行われていることを特
徴とする請求項１に記載の多本針二重環縫いミシン。2. The multi-needle double chain stitch according to claim 1, wherein the disengagement of the needle thread by one of the cam surfaces is performed from the needle thread inserted through the rightmost needle. sewing machine.
案内間の各針糸の経路長は右側の針に挿通された針糸ほ
ど長くなされていることを特徴とする請求項１または２
に記載の多本針二重環縫いミシン。3. The needle thread between the thread guides when engaged with the other cam surface has a path length longer as the needle thread inserted through the right needle. 2
The multi-needle double chain stitch sewing machine according to 1.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02249699A JP3576022B2 (en) | 1999-01-29 | 1999-01-29 | Multi needle double chain stitch machine |
| TW88219361U TW441651U (en) | 1999-01-29 | 1999-11-15 | Sewing machine for multiple needle double chain stitch |
| CN99126704A CN1123660C (en) | 1999-01-29 | 1999-12-14 | Multi-needle double-thread chain stitch machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02249699A JP3576022B2 (en) | 1999-01-29 | 1999-01-29 | Multi needle double chain stitch machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000218071A true JP2000218071A (en) | 2000-08-08 |
| JP3576022B2 JP3576022B2 (en) | 2004-10-13 |
Family
ID=12084361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02249699A Expired - Fee Related JP3576022B2 (en) | 1999-01-29 | 1999-01-29 | Multi needle double chain stitch machine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3576022B2 (en) |
| CN (1) | CN1123660C (en) |
| TW (1) | TW441651U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278435A (en) * | 2011-09-13 | 2015-01-14 | 大和缝纫机制造株式会社 | Stitch structure of double-chain-ring seam |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5941271B2 (en) * | 2011-11-24 | 2016-06-29 | ペガサスミシン製造株式会社 | Pseudo double ring seam structure and multi-needle sewing machine forming the seam |
| DE102015005298A1 (en) * | 2015-04-27 | 2016-10-27 | PFAFF lndustriesysteme und Maschinen GmbH | Multi-needle chain stitch sewing machine |
-
1999
- 1999-01-29 JP JP02249699A patent/JP3576022B2/en not_active Expired - Fee Related
- 1999-11-15 TW TW88219361U patent/TW441651U/en not_active IP Right Cessation
- 1999-12-14 CN CN99126704A patent/CN1123660C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104278435A (en) * | 2011-09-13 | 2015-01-14 | 大和缝纫机制造株式会社 | Stitch structure of double-chain-ring seam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1123660C (en) | 2003-10-08 |
| JP3576022B2 (en) | 2004-10-13 |
| TW441651U (en) | 2001-06-16 |
| CN1263960A (en) | 2000-08-23 |
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