JPS5998876U

JPS5998876U - Lockstitch sewing machine thread trimming device

Info

Publication number: JPS5998876U
Application number: JP20167182U
Authority: JP
Inventors: 務尾崎
Original assignee: 三菱電機株式会社
Priority date: 1982-12-24
Filing date: 1982-12-24
Publication date: 1984-07-04

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図はこの考案に係る自動糸切りミシンの好適な実施
例を示す構成図、第２図は第１図の■−■方向より見た
一部断面図を含む左側面図で、カーネ追従腕１０と糸切
りカム２、糸緩めレバー１４と糸緩めカム３との保合状
態を示す。第３図は第２図のＩＶ−ＩＶ断面図、第４図
は第１図の■−■断面図、第５図は下軸１、ブツシュ４
、糸切りカム２、糸緩めカム２の構成図を示す説明図で
ある。各図中同一部材には同一符号を付し、１は下軸、２は糸
切りカム、３は糸緩めカム、１０はカム追従腕、１４は
糸緩めレバーである。Fig. 1 is a configuration diagram showing a preferred embodiment of the automatic thread trimming sewing machine according to this invention, and Fig. 2 is a left side view including a partial sectional view as seen from the direction ■-■ of Fig. The state in which the arm 10 and the thread cutting cam 2 and the thread loosening lever 14 and the thread loosening cam 3 are engaged is shown. Fig. 3 is a sectional view taken along IV-IV in Fig. 2, Fig. 4 is a sectional view taken along
, is an explanatory diagram showing a configuration diagram of a thread cutting cam 2 and a thread loosening cam 2. In each figure, the same members are given the same reference numerals, and 1 is a lower shaft, 2 is a thread cutting cam, 3 is a thread loosening cam, 10 is a cam follower arm, and 14 is a thread loosening lever.

Claims

[Scope of utility model registration request]

A thread trimming cam 2 that operates in conjunction with the lower shaft 1 to operate an automatic thread trimming mechanism, and a thread loosener that operates in conjunction with the lower shaft 1 to operate a mechanism that loosens the tension on the sewing machine thread held between a pair of tension discs during automatic thread trimming. In an automatic thread trimming sewing machine having a cam 3, the lower shaft 1
A bushing 4 is mounted on the bushing 4 so as to be adjustable in the axial direction, and the thread trimming cam 2 is mounted on the bushing 4 so as to be rotatable, and the end of the bushing 4 facing one side of the thread trimming cam 2 has a thrust shaft of the cam. A flange 4a is provided for positioning on one side of the bushing 4, and a thread trimming cam 2 is provided on the opposite side of the bushing 4 to the flange 4a.
The thread loosening cam 3 is installed adjacent to the thread cutting cam 2 so as to be rotatably adjustable separately from the thread cutting cam 2.
A thread trimming device for a lockstitch sewing machine, characterized in that the device is configured to position the other side in the thrust direction of the lockstitch sewing machine.