JPS60158581U

JPS60158581U - Sewing machine needle thread supply device

Info

Publication number: JPS60158581U
Application number: JP4697184U
Authority: JP
Inventors: 生野　哲男; 俊幸加藤
Original assignee: ジューキ株式会社
Priority date: 1984-03-31
Filing date: 1984-03-31
Publication date: 1985-10-22
Also published as: JPS6132630Y2

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

[Brief explanation of drawings]

第１図は、布と糸との関係を示す説明断面図、第２図は
、従来の巻厚検出装置の概要を示す側面図、第３図及び
第４図は、鞘厚変化時の押え棒の状態を示す一部断面説
明図で、第３図は、鞘厚が小に変る場合の図、第４図は
、鞘厚が大に変る場合の図、第５図は、本考案を適用し
た本縫ミシンの上糸関係の構成を示した斜視図、第６図
は主軸、天秤及び針棒の動作をタイミング曲線で示した
グラフ、第７図は、制御関係の入出力図、第８図は、同
じくブロック図、第９図は、フローチャートであ゛る。Fig. 1 is an explanatory cross-sectional view showing the relationship between cloth and thread, Fig. 2 is a side view showing an outline of a conventional winding thickness detection device, and Figs. 3 and 4 are presser foot when sheath thickness changes. These are partial cross-sectional explanatory views showing the state of the rod. Figure 3 is a diagram when the sheath thickness changes to a small value, Figure 4 is a diagram when the sheath thickness changes to a large value, and Figure 5 is a diagram when the sheath thickness changes to a large value. Fig. 6 is a perspective view showing the needle thread-related configuration of the applied lockstitch sewing machine, Fig. 6 is a graph showing the operation of the main shaft, thread take-up, and needle bar using timing curves; Similarly, FIG. 8 is a block diagram, and FIG. 9 is a flowchart.

Claims

[Scope of utility model registration request]

A winding thickness detection device installed at a predetermined distance in front of the needle bar, a spindle detection unit that calculates the number of stitches from detecting the sheath thickness to reaching the needle position, and a main shaft detection unit that calculates the number of stitches from detecting the sheath thickness to reaching the needle position; A logic section that compares the calculated number of stitches with the expected number of stitches and issues a needle thread feed signal when they become equal, and a logic section that issues a needle thread payout signal when the number of stitches is equal to the calculated number of stitches, and a logic section that issues a needle thread payout signal when the number of stitches is calculated and the expected number of stitches. 1. An upper thread supply device for a sewing machine, comprising: an upper thread feed device for supplying an amount of needle thread.