JPS602482U

JPS602482U - Thread tension switching device for overlock sewing machine

Info

Publication number: JPS602482U
Application number: JP7281984U
Authority: JP
Inventors: 森　紀久雄; 松下　秀雄
Original assignee: ペガサスミシン製造株式会社
Priority date: 1984-05-17
Filing date: 1984-05-17
Publication date: 1985-01-10
Also published as: JPS6026787Y2

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 the drawing]

第１図は生地を縁掛り縫いすると共に空環を形成した状
態を示す略図、第２図は針糸が１本の場合における縁掛
り縫いの編目構成を示す略図、第３図ａ及びｂは本考案
の１実施例を示す斜視図及び同実施例の押え板の上面図
、第４図は同実施例の糸調子器を支持板上に取着した状
態を示す斜視図、第５図は同実施例の糸調子切換機構を
示す斜視図、第６図は同実施例の生地検出器の光電セン
サの略図、第７図は同実施例の運針パルス発生器の斜視
図、第８図は同実施例の制御回路のブロック図、第９図
は同実施例の動作タイムチャート、第１０図及び第１１
図は糸調子器及び糸調子切換機構の他の実施例を示す斜
視図である。１０・・くシン本体、１３・・・針糸、１４．１５・・
・ルーバ糸、１６ａ、　　１６ｂ、　　１７ａ、　　１
７ｂ、　　１８ａ。１８ｂ・・・糸調子器、２０・・・糸調子切換機構、３
０・・・生地検出器、３１・・・運針パルス発生器。儒％’　５２−−一暑　− 蛮扉２８−−−寸一一 −−ヒ一番Figure 1 is a schematic diagram showing the state in which the fabric is edge-stitched and an empty ring is formed. Figure 2 is a schematic diagram showing the stitch structure of edge-stitching when one needle thread is used. Figures 3 a and b are A perspective view showing one embodiment of the present invention and a top view of the presser plate of the same embodiment, FIG. 4 is a perspective view showing the state in which the thread tension device of the same embodiment is mounted on the support plate, and FIG. FIG. 6 is a schematic diagram of the photoelectric sensor of the fabric detector of the same embodiment, FIG. 7 is a perspective view of the needle movement pulse generator of the same embodiment, and FIG. 8 is a perspective view showing the thread tension switching mechanism of the same embodiment. A block diagram of the control circuit of the same embodiment, FIG. 9 is an operation time chart of the same embodiment, and FIGS.
The figure is a perspective view showing another embodiment of the thread tension device and thread tension switching mechanism. 10...Kushin body, 13...Needle thread, 14.15...
・Louva thread, 16a, 16b, 17a, 1
7b, 18a. 18b...Thread tension device, 20...Thread tension switching mechanism, 3
0... Fabric detector, 31... Hand movement pulse generator. Confucian%' 52--Issatsu-Ban door 28--Sun 11--Hi Ichiban

Claims

[Scope of utility model registration request]

A plurality of thread tension devices that can alternately switch the thread tightening function between an actual state and a latent state are provided in each thread path of the needle thread and louver thread, and when the thread tightening function is in the actual state, each thread tension device is A first thread tension device group in which the thread feeding ratio is set in advance to obtain the first sewing state, and a thread tightening function for each thread path of needle thread and louver thread are alternately set in an actual state and a latent state. A plurality of thread tension devices are provided separately from each switchable thread tension device of the first thread tension device group, and the thread feeding ratio of each thread tension device when the thread tightening function is in an actual state is set to a second thread tension device. A second thread tension device group preset to obtain the sewing state of A thread tension switching mechanism that selectively switches the thread tightening function of the thread tension device between an actual state and a latent state, a fabric detector that detects the edge of the fabric, and a pulse signal that synchronizes with the needle movement of the sewing machine. The pulse signal output from the needle movement pulse generator is counted based on the generated needle movement pulse generator and the fabric edge detection signal of the fabric detector, and when a preset value is counted, the thread tension switching mechanism is activated. A thread tension switching device for an overlock sewing machine, comprising a counter mechanism for energizing and deenergizing.