JPS6151173U

JPS6151173U -

Info

Publication number: JPS6151173U
Application number: JP12317285U
Authority: JP
Priority date: 1985-08-10
Filing date: 1985-08-10
Publication date: 1986-04-05
Also published as: JPH0328875Y2

Description

[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
ロツク図、第３図は第２図における作動回路２８
の詳細図、第４図は第２図における第二設定装置
２４の詳細を示したブロツク図、第５図はタイム
チヤート、第６図はアツプ・ダウンスイツチと係
数用カウンタの関係を示したフローチヤートであ
る。 Figure 1 is a perspective view of the main parts, Figure 2 is a block diagram of the electric circuit, and Figure 3 is the operating circuit 28 in Figure 2.
4 is a block diagram showing details of the second setting device 24 in FIG. 2, FIG. 5 is a time chart, and FIG. 6 is a flow chart showing the relationship between the up/down switch and the coefficient counter. It's a chat.

Claims

[Claims for Utility Model Registration] Disposed on the needle thread path between the thread take-up and the needle thread supply source so as to be spaced apart from each other at the front and the front in the needle thread supply direction, so that the needle thread cannot pass through due to its action and has no effect. two holding means 6 and 7 that act on the needle thread so that the needle thread can pass through the sewing machine, and a specific rotation angle of the main shaft that is arranged in relation to the main shaft and corresponds to the time when the sewing machine needle is located below the upper surface of the bed. A position detection device 17 that detects and generates a position signal.
and the needle thread path between the two holding means is changed periodically by a certain amount to increase the length of the path during the generation period of the position signal. A feeding body 12 that operates in synchronization with the thread take-up to minimize the length of the yarn until it reaches its maximum tension, and a feeding body 12 that detects the amount of yarn drawn in between the two holding means from the supply source and responds to the fed-in amount. A feed-out detection device 16 that generates a thread amount signal is used to disable the holding means on the supply source side in relation to the generation of the position signal, actuate the holding means on the thread take-up side, and operate the needle thread in conjunction with the feeding body. is fed from the supply source between both holding means, and the holding means on the supply source side is operated to prevent the needle thread from being fed out until the next position signal is generated in relation to the feeding of a preset amount of needle thread. In a needle thread supply device of a sewing machine, the needle thread feeder is connected to a thread take-up device so that a holding means on the thread take-up side is inactive so that a set length of needle thread is drawn out from a supply source and supplied to the thread take-up each time a stitch is formed. and a gate circuit G which receives the output of the position detection device as input, opens the circuit upon receiving the position signal, closes the circuit when the position signal disappears, and generates a different signal when receiving the yarn amount signal while the circuit is open and at other times. , A timer T that operates for a certain period of time according to the gate circuit output when receiving the thread amount signal when the position signal disappears.
A needle thread supply device for a sewing machine, comprising: an alarm device 47 that operates in synchronization with the operation of a timer and generates light or sound.