JPS5825993Y2 - Chain stitch sewing machine balance device - Google Patents
Chain stitch sewing machine balance deviceInfo
- Publication number
- JPS5825993Y2 JPS5825993Y2 JP1978049606U JP4960678U JPS5825993Y2 JP S5825993 Y2 JPS5825993 Y2 JP S5825993Y2 JP 1978049606 U JP1978049606 U JP 1978049606U JP 4960678 U JP4960678 U JP 4960678U JP S5825993 Y2 JPS5825993 Y2 JP S5825993Y2
- Authority
- JP
- Japan
- Prior art keywords
- needle bar
- crank
- auxiliary
- pin
- sewing machine
- 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
Landscapes
- Sewing Machines And Sewing (AREA)
Description
【考案の詳細な説明】
この考案は、環縫ミシンの天秤装置の改良に関するもの
である。[Detailed Description of the Invention] This invention relates to an improvement of a thread take-up device for a chain stitch sewing machine.
一般に、環縫ミシンにおいては針棒が上死点より針が布
にささる１での間に針糸がゆるむと縫目形成が不安定と
なり、目飛びを起し易い。Generally, in a chain stitch sewing machine, if the needle thread loosens between the top dead center of the needle bar and the point where the needle is inserted into the fabric, stitch formation becomes unstable and skipped stitches are likely to occur.
従って、従来は上下往復動する針棒に取付けられた主天
秤と共にこの天秤とは差動する補助天秤を設けて針が上
死点よシ布にささる１での針糸のたるみを取るように構
成されたものが提案されていた。Therefore, in the past, in addition to the main take-up which was attached to the needle bar that reciprocated up and down, an auxiliary take-up that moved differentially from this take-up was provided to take up the slack in the needle thread when the needle was inserted into the fabric from the top dead center. A structure composed of was proposed.
ところが、補助天秤と主天秤との位相差が一定であるた
めその差動も一定となり、とぐに長尺の布団カバーなど
を縫製する場合、生地の種類などによって１しわ“がよ
ったりすることがあった。However, since the phase difference between the auxiliary take-up and the main take-up is constant, the differential between them is also constant, so when sewing a long duvet cover, etc., one wrinkle may occur depending on the type of fabric. there were.
この考案は、上記欠点を除去すべくなされたもので、以
下この考案の一実施例について説明する。This invention was made to eliminate the above-mentioned drawbacks, and one embodiment of this invention will be described below.
図にお・いて、１はミシンアーム ２は１駆動軸３に固
着されたクランク、４はミシンアーム１に打込１れた針
棒メタル、５は針棒メタル４に摺動自在に挿通された針
棒で、その先端には縫針（図示しない）が装着されてい
る。In the figure, 1 is a sewing machine arm, 2 is a crank fixed to 1 drive shaft 3, 4 is a needle bar metal driven into the sewing machine arm 1, and 5 is a needle bar metal 4 that is slidably inserted. A sewing needle (not shown) is attached to the tip of the needle bar.
６，７はミシンアーム１に穿設された長溝、８は針棒５
に固着され、長溝６を通してミシンアーム１外に突出し
た主天秤で、その先端部は二叉状に形成され、かつそれ
ぞれの腕８ａには針糸の種類によって挿通位置をかえる
ための複数個の糸孔８ｂが設けられている。6 and 7 are long grooves drilled in the sewing machine arm 1, and 8 is the needle bar 5.
The main take-up lever is fixed to the sewing machine arm 1 through a long groove 6 and protrudes outside the sewing machine arm 1, and its distal end is formed into a bifurcated shape, and each arm 8a has a plurality of threads for changing the insertion position depending on the type of needle thread. A thread hole 8b is provided.
９は両端にそれぞれ孔９ａ 、９ｂｋ有するクランクロ
ッド、１０は両端にそれぞれ孔１０ａ、ｂよび長孔１ｏ
ｂｉ有する補助天秤用ロンド、１１はクランク２に回動
可能に植設されたピンで、同心部１１ａｂよび所定偏心
量Ｅｋ有する偏心部１１ｂを有し、同心部１１ａには孔
９ａによってクランクロッド９がまた偏心部１１ｂには
孔１０ａによって補助天秤用ロッド１０が軸支されてい
る。9 is a crank rod having holes 9a and 9bk at both ends, and 10 is a crank rod having holes 10a and b and a long hole 1o at both ends, respectively.
The auxiliary balance iron 11 is a pin rotatably implanted in the crank 2, and has a concentric part 11ab and an eccentric part 11b having a predetermined eccentricity Ek, and the concentric part 11a has a hole 9a to connect the crank rod 9. Furthermore, an auxiliary balance rod 10 is pivotally supported in the eccentric portion 11b through a hole 10a.
１２は針棒５の下部に止ねじ１２ａで固定された針棒だ
きで、その−側には第３図に示すように一体に突出ピン
１２ｂが植設されており、角駒１２ｃを介してガイド１
２ｄに挿入されている。A needle bar 12 is fixed to the lower part of the needle bar 5 with a set screw 12a, and a projecting pin 12b is integrally implanted on the negative side of the needle bar 5 as shown in FIG. Guide 1
It is inserted in 2d.
またこの突出ピン１２ｂは孔９ｂむよび長孔１０ｂに挿
通され、クランクロッド９および補助天秤用ロッド１０
が軸支されている。Further, this protruding pin 12b is inserted through the hole 9b and the elongated hole 10b, and is inserted into the crank rod 9 and the auxiliary balance rod 10.
is pivoted.
１３は補助天秤用ロッド１０がピン１１からの抜は防止
用の頭付左ねじ、１４は補助天秤用ロッド１０と一体に
構成され、長溝７を通してミシンアーム１外に突出した
補助天秤で、その先端には糸孔１４ａｋ有する。Reference numeral 13 denotes a left-handed threaded head to prevent the auxiliary take-up rod 10 from being pulled out from the pin 11; 14 denotes an auxiliary take-up lever that is integrally constructed with the auxiliary take-up rod 10 and protrudes outside the sewing machine arm 1 through the long groove 7; The tip has a thread hole 14ak.
１５は糸案内、１６は針糸で、第２図に示すように上糸
調節器（図示しない）を経て糸案内１５、主天秤８むよ
び補助天秤１４の糸孔８ｂ 、１４ａｋ通り縫針（図示
しない）の糸孔に挿通される。Reference numeral 15 indicates a thread guide, and reference numeral 16 indicates a needle thread, which passes through an upper thread adjuster (not shown) as shown in FIG. (not included) is inserted into the thread hole.
このような構成において、ミシンを運転するとクランク
２の回転によりクランクロッド９を介して針棒５は上下
に往復動すると共に補助天秤用ワンド１０一端はピン１
１の偏心部１１ｂで軸支され、かつ他端が突出ピン１２
ｂに上下方向へ遊嵌状態で軸支されているので、針棒５
の往復動よりも先行して往復動する。In this configuration, when the sewing machine is operated, the rotation of the crank 2 causes the needle bar 5 to reciprocate up and down via the crank rod 9, and one end of the auxiliary balance wand 10 is connected to the pin 1.
1, and the other end is supported by a protruding pin 12.
Since the needle bar 5 is pivotally supported vertically with a loose fit on
Reciprocating motion precedes the reciprocating motion of.
すなわち、主天秤８釦よび補助天秤１４は第１図すに示
すような軌跡を描き、主天秤８は直線運動を、補助天秤
１４はほぼ８字状の運動を行なう。That is, the main balance 8 button and the auxiliary balance 14 draw a locus as shown in FIG.
ここで、駆動軸３の回転角Ｏ０は針棒５が上死点を、回
転角１８００は針棒５が下死点の状態を示している。Here, the rotation angle O0 of the drive shaft 3 indicates that the needle bar 5 is at the top dead center, and the rotation angle 1800 indicates that the needle bar 5 is at the bottom dead center.
従って、針棒５が上死点より下降するとき、補助天秤１
４は主天秤８よりも３ぽの位相差をもって先行するため
、上死点より縫針（図示しない）が布にささるまでの針
糸１５のゆるみを糸案内１５、主および補助天秤の糸孔
８ｂ、１４ａの間で吹吸し安定した縫目が形成される。Therefore, when the needle bar 5 descends from the top dead center, the auxiliary balance 1
4 precedes the main thread take-up 8 with a phase difference of 3 points, so the slack of the needle thread 15 from the top dead center until the sewing needle (not shown) touches the fabric is measured by the thread guide 15 and the thread holes of the main and auxiliary thread take-up. A stable seam is formed by blowing between 8b and 14a.
一方、布団カバーなどの生地をかえて縫製するとき、例
えば生地が薄いと針糸１６を充分に供給しなければ縫製
物に１シワ１が生じる。On the other hand, when sewing different fabrics such as a futon cover, for example, if the fabric is thin, wrinkles 1 will occur in the sewn item unless sufficient needle thread 16 is supplied.
この場合、頭付左ねじ１３を左方向へ締付けることによ
りピン１１を回動させ、駆動軸３の回転角０°に対して
４０°の位相差をもって補助天秤１４が先方するように
ピン１１の偏心部１１ｂと補助天秤用ロッド１０との位
置関係をかえ、その位置で止めねじ１７を締付は位置固
定すれば進相外だけ余分に針糸１６を吸収することにな
るので”シワ１が生じることもない。In this case, the pin 11 is rotated by tightening the left-headed screw 13 to the left, and the pin 11 is rotated so that the auxiliary balance 14 moves forward with a phase difference of 40 degrees with respect to the rotation angle of the drive shaft 3 of 0 degrees. If the positional relationship between the eccentric part 11b and the auxiliary take-up rod 10 is changed and the set screw 17 is tightened or fixed at that position, the extra needle thread 16 will be absorbed only outside the advancing phase. It never happens.
以上のようにこの考案では、針棒を往復動させるクラン
クロッドを軸支するピンに偏心部を設けて、この偏心部
に補助天秤用ロンドの一端を軸支させると共に他端を針
棒だきの突出ピンに上下方向へ遊嵌状態で軸支させて構
成するように既設のクランクロッド軸支用ピンを一部加
工するだけで従来のミシンに補助天秤用ロンドを追加す
ればよく、また、クランクロッド軸支用ピンを同宿可能
にして主天秤と補助天秤との差動を調節することができ
るので、縫製物の生地などの変化に対しても安定した縫
目が得られる効果を奏する。As described above, in this invention, an eccentric part is provided on the pin that pivotally supports the crank rod that reciprocates the needle bar, one end of the auxiliary balance iron is pivotally supported on this eccentric part, and the other end is attached to the pin for supporting the needle bar. The auxiliary take-up iron can be added to a conventional sewing machine by simply machining a part of the existing crank rod shaft support pin so that it is supported by the protruding pin in a vertically loosely fitted state. Since the rod support pins can be arranged together to adjust the differential movement between the main take-up and the auxiliary take-up, it is possible to obtain stable stitches even when the material of the sewing product changes.
図ばいづれもこの考案の一実施例を示し、第１図ａ、ｂ
は要部の正面図、および作動説明図、第２図は外観側面
図、第３図は要部の側面図である。
なお、図中同一符号は同一または相当部分を示す。
図中、２はクランク、３は駆動軸、５は針棒、８は主天
秤、９はクランクロッド、１０は補助天秤用ロッド、１
１はピン、１２は針棒だき、１４は補助天秤である。Each figure shows an embodiment of this invention, and Figures 1a and b
2 is an external side view, and FIG. 3 is a side view of the main parts. Note that the same reference numerals in the figures indicate the same or corresponding parts. In the figure, 2 is a crank, 3 is a drive shaft, 5 is a needle bar, 8 is a main balance, 9 is a crank rod, 10 is an auxiliary balance rod, 1
1 is a pin, 12 is a needle bar, and 14 is an auxiliary balance.
Claims (1)
に固着された主天秤と一端が上記クランクに、他端が針
棒だきに連結され、上記針棒を上下方向へ往復動させる
クランクロッドと、このクランクロッドの一端を上記ク
ランクに連結すると共に上記クランクに対して回動調整
可能に取付けられ、かつ一部に偏心部を有するピンと、
一端が上記ピンの偏心部に軸支され、他端が上記針棒た
きに上下方向へ遊嵌状態で軸支される補助天秤用ロンド
と、この補助天秤用ロンドの他端側に設けられた補助天
秤とを備え、上記ピンを回動させることにより上記主天
秤と補助天秤の差動状態を調節するようにした環縫ミシ
ンの天秤装置。A crank that is rotated by a drive shaft, a needle bar, a main balance fixed to the needle bar, and a crank rod that is connected to the crank at one end and to the needle bar at the other end and reciprocates the needle bar in the vertical direction. and a pin that connects one end of the crank rod to the crank, is attached to the crank so as to be rotatably adjustable, and has a partially eccentric portion;
An auxiliary balance rond, one end of which is pivotally supported by the eccentric portion of the pin, and the other end of which is pivotally supported by the needle bar in a vertically loosely fitted state, and a auxiliary balance rond provided on the other end side A balance device for a chain stitch sewing machine, comprising: an auxiliary balance, and a differential state between the main scale and the auxiliary scale is adjusted by rotating the pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978049606U JPS5825993Y2 (en) | 1978-04-14 | 1978-04-14 | Chain stitch sewing machine balance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1978049606U JPS5825993Y2 (en) | 1978-04-14 | 1978-04-14 | Chain stitch sewing machine balance device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54151571U JPS54151571U (en) | 1979-10-22 |
| JPS5825993Y2 true JPS5825993Y2 (en) | 1983-06-04 |
Family
ID=28935510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1978049606U Expired JPS5825993Y2 (en) | 1978-04-14 | 1978-04-14 | Chain stitch sewing machine balance device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5825993Y2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5274844U (en) * | 1975-12-03 | 1977-06-04 |
-
1978
- 1978-04-14 JP JP1978049606U patent/JPS5825993Y2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54151571U (en) | 1979-10-22 |
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