Separator for horizontally rotating shuttle of sewing machine and regulating method thereof

Abstract

To provide an opener of a horizontal shuttle of a sewing machine and method of adjustment thereof, capable of easily adjusting the opening of a projection of a shuttle body. The opener 10 comprises an engagement member 20 drawing the shuttle body 60 close in the direction opposite from the direction of rotation of the outer shuttle via an engaged part 62 as the distal end moves in a prescribed trajectory according to the phase of rotation of a driving shaft of rotating / driving the outer shuttle 70 of the horizontal shuttle 50. The transmission mechanism 30 moves the end of the engagement member in the trajectory by the driving of the driving shaft of rotating the outer shuttle and holds the engagement member in such a way that the engagement member can be moved / adjusted. The opener performs the following processes: a phase setting process of setting the rotation phase of the driving shaft at the engagement starting phase for the end of the engagement member to form a gap with a target width via the engaged part, a shuttle body positioning process for making the projection of the shuttle body abut on an abutting part for restraint, and an engagement member position adjusting process for moving / adjusting the engagement member to the engagement starting position with the engaged part.

Description

technical field [0001] The invention relates to a separator for a horizontal rotary hook of a sewing machine and an adjusting method thereof. Background technique [0002] The horizontal rotary hook of a conventional sewing machine is arranged below the needle plate, forms a thread loop while catching the upper thread passing through the needle, and has the function of passing the lower thread through the upper thread loop to bind the stitches. [0003] This horizontal rotary hook has: on its outer circumference, an outer rotary hook that has a sharp corner that catches the upper thread and is driven to rotate around the vertical direction; Hook. [0004] And, the outer rotary hook, at its bottom, is driven to rotate at double speed relative to the main shaft of the sewing machine by the vertically arranged rotary hook shaft, and uses the sharp corner to catch the upper thread loop and make it drill into the inner rotary hook. [0005] On the other hand, on the inner hook,...

AI Technical Summary

Problems solved by technology

[0011] However, it is very difficult to insert a feeler gauge between the inner hook protrusion and the downstream side restricting protrusion arranged in the narrow space inside the needle plate.

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