JPS6145081U - Sewing machine with needle position detection device - Google Patents

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薗は本考案を具体化した実施例の一部縦断面図、第
２図は第１図の右側面図、第３図は第１図の■一■線断
面図、第４図ｉよ第１図のＩＶ一ＩＶ線断面図、第５図
は３図のＶ一■線拡大断面図である。 図中、１はミシン機枠、２は主軸、３はプーリ、４は針
下位置検出板、４ａは反射面、４ｂは針下位置検出用透
孔、’４ｃは回転速度検出用透孔、５は針上位置検出板
、５ａは反射面、５ｂは針上位置検出用透孔、６ａは針
上位置検出器、６ｂは針下位置検出器、６ｃは回転速度
検出器である。Figure 1 is a partial longitudinal cross-sectional view of an embodiment embodying the present invention, Figure 2 is a right side view of Figure 1, Figure 3 is a cross-sectional view taken along the line ■■ in Figure 1, and Figure 4 i. 1, and FIG. 5 is an enlarged sectional view taken along line V-1 in FIG. 3. In the figure, 1 is a sewing machine frame, 2 is a main shaft, 3 is a pulley, 4 is a needle down position detection plate, 4a is a reflective surface, 4b is a through hole for detecting the needle down position, '4c is a through hole for detecting rotational speed, 5 is a needle top position detection plate, 5a is a reflective surface, 5b is a through hole for needle top position detection, 6a is a needle top position detector, 6b is a needle bottom position detector, and 6c is a rotational speed detector.

Claims (1)

【実用新案登録請求の範囲】 １ ミシン機枠１に回転可能に支持され、針を上下動さ
せる主軸２と、 その主軸２に一体的に回転するように固定されたプーり
３と、 そのブーり３の前記ミシン機枠１側の端面に、前記主軸
２と同心的にそれぞれ固定された環状の針上位置および
針下位置検出板５，４と、 その各検出板５，４と対向する前記ミシン機枠１に固定
され、各検出板５，４と共同して位置検出信号を出力す
る検出器６ａ， ６ｂ，６と、 前記プーり３を軸線方向に貫通して設けられ、少なくと
も前記針上位置検出板５を、プーリ３外から回転方向に
任意に位置調整ずる調整手段と を備える針位置検出装置付きミシン。 ２ 前記両検出板５，４の一方はその一部を、他方と前
記プーり３との間に挾持して固定され、他方が前記調整
手段によって位置調整可能である実用新案登録請求の範
囲第１項記載の針位置検出装置付きミシン。 ３ 前記両検出板５，４は反射面５ａ，４ａと非反射用
透孔５ｂ，４ｂ，４ｃとを有し、また前記検出器６ａ，
ｅｂ，６ｃは投光手段と受光手段とからなる実用新案登
録請求の範囲第１項または第２項に記載の針位置検出装
置付きミシン。 ４ 前記針下位置検出板４は、回転速度検出用の反射面
４ａと、非反射用透孔４ｃとを円周方向に多数有し、そ
の透孔と対向するプーり面を凹ませ、また反射面および
透孔と対向するミシン機枠１に、投光手段と受光手段と
からなる検出器６ａｔ ６ｂｔ ６Ｃを備える実用
新案登録請求の範囲第３項に記載の針位置検出装置付き
ミシン。[Claims for Utility Model Registration] 1. A main shaft 2 which is rotatably supported on a sewing machine frame 1 and moves the needle up and down, a pulley 3 fixed to the main shaft 2 so as to rotate integrally with the main shaft 2, and a boot thereof. Annular needle top position and needle bottom position detection plates 5 and 4 are respectively fixed to the end surface of the sewing machine frame 1 side of the sewing machine frame 1 concentrically with the main shaft 2, and the needle detection plates 5 and 4 are opposed to each other. Detectors 6a, 6b, 6 fixed to the sewing machine frame 1 and outputting a position detection signal in cooperation with the respective detection plates 5, 4; A sewing machine equipped with a needle position detection device, which is equipped with an adjusting means for arbitrarily adjusting the position of the needle top position detection plate 5 in the rotational direction from outside the pulley 3. 2. One of the detection plates 5, 4 is partially fixed between the other and the pulley 3, and the position of the other is adjustable by the adjustment means. A sewing machine equipped with a needle position detection device according to item 1. 3. Both the detection plates 5, 4 have reflective surfaces 5a, 4a and non-reflection through holes 5b, 4b, 4c, and the detectors 6a,
Reference numerals eb and 6c refer to a sewing machine equipped with a needle position detection device according to claim 1 or 2, which is comprised of a light projecting means and a light receiving means. 4. The needle down position detection plate 4 has a reflective surface 4a for detecting rotational speed and a large number of non-reflective through holes 4c in the circumferential direction, and has a recessed pulley surface facing the through holes. A sewing machine with a needle position detection device according to claim 3, which is provided with a detector 6at 6bt 6C comprising a light projecting means and a light receiving means on the sewing machine frame 1 facing the reflective surface and the through hole.