JPS60182973U

JPS60182973U - Sewing machine needle thread supply device

Info

Publication number: JPS60182973U
Application number: JP6400085U
Authority: JP
Inventors: 亨松原
Original assignee: ジューキ株式会社
Priority date: 1985-04-27
Filing date: 1985-04-27
Publication date: 1985-12-04
Also published as: JPS6226075Y2

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

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は要部の斜視図、第２図は電気回路のブロック図
、第３図は第一変換回路の他の実施例、第４図は第３図
のタイムチャート、第５，６図は・第１図に対応する他
の実施例である。３は天秤、８はステッピングモータ、９．１０は繰り出
し手段としてのローラ、１２，１３，１４は上糸把持装
置を構成する挟持圧と電磁ソレノイド、２０は（主軸）
パルス発生器である。Figure 1 is a perspective view of the main parts, Figure 2 is a block diagram of the electric circuit, Figure 3 is another embodiment of the first conversion circuit, Figure 4 is the time chart of Figure 3, Figures 5 and 6. This is another embodiment corresponding to FIG. 3 is a balance, 8 is a stepping motor, 9.10 is a roller as a feeding means, 12, 13, and 14 are a clamping pressure and an electromagnetic solenoid that constitute an upper thread gripping device, and 20 is a (main shaft).
It is a pulse generator.

Claims

【実用新案登録請求の範囲】駆動源に連動し一固定軸線を中心に回転可能に機枠に支
持した主軸と、上糸を支持し縫目形成に関連して上糸を緊張・弛緩する
ように主軸に連動して往復動する天秤と、主軸に連動し主軸の所定角度回転毎に信号を発生するパ
ルス発生器と、パルス発生器の信号に関連しその信号の周波数に正比例
する速度で一方向回転するステッピングモータと、上糸に係合し回転により上糸を準給源から繰り出すよう
に天秤と上糸供給源間の上糸経路上に配置しステッピン
グモータに連動して回転可能に機枠に支持した繰り出し
手段、とを備え、−縫目の形成に要する長さの上糸を主軸の回
転時に供給源から連続的に繰り出すようにした上糸供給
装置において、電磁力又は弾性力により作用し天秤による上糸の緊張期
間中は上糸を把持し、且つ天秤による上糸の弛緩期間中
は上糸の把持を解放するように天秤の作動に関連させた
上糸把持装置を、繰り出し手段と供給源間又は繰り出し
手段と天秤間の上糸経路上に配置したことを特徴とする
ミシンの上糸供給装置。[Scope of claim for utility model registration] A main shaft supported on a machine frame in conjunction with a drive source and rotatable about a fixed axis, and a main shaft that supports an upper thread and tensions and loosens the upper thread in connection with stitch formation. A balance that reciprocates in conjunction with the spindle; a pulse generator that moves in conjunction with the spindle and generates a signal every time the spindle rotates by a predetermined angle; A stepping motor that rotates in one direction and a machine frame that is arranged on the needle thread path between the thread take-up and the needle thread supply source so that it can rotate in conjunction with the stepping motor so that it engages with the needle thread and rotates to feed the needle thread from the sub-supply source. A needle thread feeding device, comprising: - a needle thread of a length required to form a stitch is continuously fed out from a supply source when the main shaft rotates; The upper thread gripping device is connected to the operation of the thread take-up so as to grip the upper thread during the tensioning period of the upper thread by the thread take-up, and to release the grip of the upper thread during the relaxation period of the upper thread by the thread take-up. 1. A needle thread supply device for a sewing machine, characterized in that it is disposed on a needle thread path between a feeder and a supply source or between a feeding means and a thread take-up.