JPS61124286U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本考案の実施例に係り、第１図は機構の
斜視図、第２図はカム従動子係合状態図、第３図
はその側面図、第４図、第５図はエロンゲータ状
態の説明図、第６図はその模様縫目であり、１は
ミシン機枠、７は駆動軸、１０は第１の模様カム
、１１は第２の模様カム、１３は模様選択部、２
０は第１のカム従動子、２１は第２のカム従動子
、１０ａはエロンゲータ作動カム、３８はエロン
ゲータ作動爪である。 The drawings relate to an embodiment of the present invention, and FIG. 1 is a perspective view of the mechanism, FIG. 2 is a diagram showing the cam follower engaged state, FIG. 3 is a side view thereof, and FIGS. 4 and 5 are views of the elongator state. The explanatory diagram, FIG. 6, shows the pattern stitches, 1 is the sewing machine frame, 7 is the drive shaft, 10 is the first pattern cam, 11 is the second pattern cam, 13 is the pattern selection section, 2
0 is a first cam follower, 21 is a second cam follower, 10a is an elongator operating cam, and 38 is an elongator operating claw.

Claims (1)

【実用新案登録請求の範囲】 (1) ミシン機枠内に回転可能に支持される駆動
軸と、該駆動軸の回転に連動する模様カムの外周
に一端が係脱可能に支持されたカム従動子と、該
カム従動子の一端を模様カムに係合せしめた時連
結ロツドを介して振巾運動せしめられる針棒支持
体とを備えたミシンにおいて、前記駆動軸の回転
に連動して減速回転せしめられる第１の模様カム
と、該第１の模様カムと同軸上に第２の模様カム
とを装着せしめ、模様選択部の操作により前記第
１の模様カムに係脱せしめられる第１のカム従動
子と前記第２の模様カムに係脱せしめられる第２
のカム従動子とを備え前記第１のカム従動子と前
記第２のカム従動子を係合せしむるための係合部
を有する事を特徴とするジグザグミシンの模様発
生機構。 (2) 前記第２の模様カムの駆動手段が前記第１
の模様カムに設けたエロンゲータ作動カムに従動
するエロンゲータ作動爪と、該エロンゲータ作動
爪の回動により間欠的に前記第２の模様カムを駆
動する係脱手段と前記エロンゲータ作動爪の回動
角度を変えて前記第２の模様カムの回動量を調節
する調節手段を備えたことを特徴とする実用新案
登録請求の範囲第１項記載のジグザグミシンの模
様発生機構。[Claims for Utility Model Registration] (1) A drive shaft rotatably supported within the sewing machine frame, and a cam follower whose one end is removably supported on the outer periphery of a pattern cam that is linked to the rotation of the drive shaft. and a needle bar support that is caused to swing in a width direction via a connecting rod when one end of the cam follower is engaged with the pattern cam, the needle bar support body is configured to rotate at a reduced speed in conjunction with the rotation of the drive shaft. a first pattern cam that is attached to the first pattern cam; a second pattern cam that is attached coaxially with the first pattern cam; and a first cam that is made to engage and disengage from the first pattern cam by operating a pattern selection section; a second pattern cam that is engaged with and disengaged from the follower and the second pattern cam;
1. A pattern generating mechanism for a zigzag sewing machine, comprising: a cam follower; and an engaging portion for engaging the first cam follower and the second cam follower. (2) The driving means for the second pattern cam is the driving means for the second pattern cam.
an elongator operating claw that is driven by an elongator operating cam provided on the pattern cam; an engaging/disengaging means that intermittently drives the second pattern cam by rotation of the elongator operating claw; and a rotation angle of the elongator operating claw. The pattern generating mechanism for a zigzag sewing machine according to claim 1, further comprising an adjusting means for adjusting the amount of rotation of the second pattern cam.