JPS6177982U

JPS6177982U -

Info

Publication number: JPS6177982U
Application number: JP16253384U
Authority: JP
Priority date: 1984-10-26
Filing date: 1984-10-26
Publication date: 1986-05-24
Also published as: JPS62622Y2

Description

[Brief explanation of the drawing]

第１図は本考案装置の斜視図、第２，３，４図
は作用説明図、第５図は縫糸切断部の平面図であ
る。 Fig. 1 is a perspective view of the device of the present invention, Figs. 2, 3, and 4 are explanatory views of the operation, and Fig. 5 is a plan view of the suture cutting section.

Claims

[Claims for Utility Model Registration] The rotation of the motor can be transmitted to the main shaft by moving in one direction, and the transmission can be interrupted by returning to the original position, and the inertial rotation of the main shaft can be stopped. A cutoff lever 3 is provided with an elastic acting force in the return direction, and when the cutoff lever is moved in one direction, the cutoff lever is locked in the moving position and released after a predetermined number of rotations of the main shaft. a locking means that allows the return movement of the control lever; a thread trimming cam 30 having a cam surface and fixed to the main shaft; and a thread trimming cam 30 disposed between the cutoff lever and the thread trimming cam and interlocked with one-way movement of the cutoff lever. The thread trimming cam is moved to an inactive position in which it is not interlocked with the thread trimming cam, and can be moved to an operating position in which it is interlocked with the thread trimming cam in conjunction with the return movement of the cutoff lever. A thread trimming mechanism has a movable actuating body 36, a movable blade 43 disposed on the lower surface of the throat plate, which catches and cuts the sewing thread in conjunction with the movement of the actuating body due to changes in the cam surface of the thread trimming cam, and a thread trimming mechanism disposed on the upper surface of the needle plate. In a cycle sewing machine equipped with a presser foot that can be moved between an active position where it presses against the upper surface of the bed, which has an elastic force in the opposite direction, and a non-active position where it moves away from the presser foot, the presser foot always presses the fabric in one direction. When the presser foot moves to the non-working position, it is displaced against the elastic force, and the actuating body is moved to the non-working position and locked, and when the presser foot is in the working position, the cutoff lever is closed. 1. A thread cutting device for a sewing machine, characterized in that a limiter 32 is provided that returns to release the locking of the actuating body in response to displacement of the actuating body due to a movement operation in the direction.