JPS60182972U

JPS60182972U - Sewing machine needle thread supply device

Info

Publication number: JPS60182972U
Application number: JP6399985U
Authority: JP
Inventors: 飯村　郁朗; 佐久間　邦晴; 純夫後藤
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: JPS6121021Y2

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図はこの発明装置の斜視図、第２図は電気回路のブ
ロック図、第３図はタイムチャート、第４．５図は繰り
出し体への糸掛は作用の説明図である。２・・・第一保持手段、３・・・第二保持手段、９・・
・繰り出し体、１９・・・抵抗付与装置（ペーステンシ
ョン）、２２・・・緊吸収装置（光吸収はね）、２７・
・・繰り出し検出装置、２８・・・位置検出装置、３０
・・・設定装置。FIG. 1 is a perspective view of the device of the present invention, FIG. 2 is a block diagram of the electric circuit, FIG. 3 is a time chart, and FIG. 4.5 is an explanatory diagram of the action of threading on the feeding body. 2...First holding means, 3...Second holding means, 9...
- Feeding body, 19... Resistance imparting device (pace tension), 22... Tension absorption device (light absorption splash), 27.
... Feeding detection device, 28 ... Position detection device, 30
...Setting device.

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 relatively spaced apart from each other in the forward and forward directions in the needle thread supply direction, so that the needle thread cannot pass through due to its action and has no effect. After changing the needle thread path between the first and second holding means 2゜3 that allows the needle thread to pass through the needle thread and increasing the length of the path during the relaxation period of the needle thread by the thread take-up. A feeding body 9 that operates in synchronization with the thread take-up so as to decrease the amount of needle thread, and a feeding body 9 that engages with the needle thread between the feeding body and the first holding means located before the feeding body in the needle thread supply direction, and maintains the needle thread path between the feeding body and the first holding means. A feed-out detection device 27 that is displaced in proportion to the length of the needle thread fed out from the supply source due to an increase in length, and generates a different thread amount signal corresponding to the amount of displacement; A position detection device 28 that detects a specific angle of rotation of the main shaft and generates a position signal, and a setting device that can generate a setting signal corresponding to the needle thread length required to form one stitch in response to different sewing conditions. 30, a comparison circuit that compares the thread amount signal and the setting signal and generates a coincidence signal when they match, and a comparison circuit that receives the coincidence signal and the position signal, and always makes the first holding means inactive and outputs the coincidence signal. and is inactive in relation to the subsequent position signal, and always acts as a second holding means to make it inactive from the generation of the coincidence signal to the generation of the subsequent position signal. A second sewing machine is provided with a control circuit that controls the operation to be activated before the tension period of the needle thread by the thread take-up starts, and the amount of needle thread necessary for forming a stitch is paid out every two stitches. a resistance imparting device 19 which is disposed on the needle thread path between the holding means and the thread take-up, and which applies stronger passage resistance to the needle thread than the passage resistance caused by the second holding means when the second holding means is inactive; It engages with the needle thread between the holding means and the resistance applying device, and the force is accumulated as the needle thread is tensioned by the thread take-up, and the restoring force previously accumulated in connection with the inaction of the second holding means causes the same action. A needle thread supply device for a sewing machine, comprising: a light absorption spring 22 that acts to draw out slack needle thread between the holding means and between the second holding means and the resistance applying device.