Presser device of sewing machine

Abstract

To facilitate a change of a circular arc path of a presser foot near a sewing machine head loading face, and enable a maximum utilization of existing components when the circular arc path of the presser foot is changed. The presser device of sewing machine comprises a push-up lever rotatably supported on a sewing machine frame and urged by a spring, and a connecting rod linked to the push-up lever, a swinging shaft rotatably supported on a bushing so as to engage with the connecting rod, a presser seat connected to a crank piece of the swinging shaft and having the presser foot fixed at the tip, and an elastic member engaged with the presser seat. A bracket is provided on a back face of the sewing machine frame so that its fixing position is changed. The bushing is fixed to the bracket. The crank piece of the swinging shaft can be divided in two. Each engaging surface of the divided crank piece of the swinging shaft is refixed at the time of changing of the fixing position of the bracket so that an eccentric part of the crank piece is not changed from initially set position.

Description

technical field [0001] The present invention relates to a presser device of a sewing machine that is combined with a cloth (raw ground) from above to press the cloth on a placement surface. Background technique [0002] In a conventional needle presser device of a sewing machine, a swing shaft connected to a press table is supported by a bushing fixed to a sewing machine frame (for example, see Patent Document 1). And, press the pressing plate fixed on the top end of the pressing table downward by the pressing spring device (pressing rod), that is, to the workpiece support member (placement surface of the sewing machine head). [0003] Charter Document 1 [0004] Fact Publication No. 6-16604 (Left Column on Page 2, Figure 5) [0005] However, in conventional needle presser devices for sewing machines, since the bushes supporting the swing shaft are fixed to the sewing machine frame, the arc trajectory of the presser near the sewing machine head placement surface cannot be ...

AI Technical Summary

Problems solved by technology

[0005] However, in the conventional sewing machine needle presser device, since the bushing supporting the swing shaft is fixed to the sewing machine frame, it is not possible to change the arc trajectory of the presser near the sewing machine head placement surface.

As a result, when sewing materials of different types or thicknesses, the presser plate may hinder the feeding of the materials.

In addition, if the fixed position of the press plate is translated on the press table in order to change the arc trajectory, the press plate must be removed from the sewing part of the sewing machine. As a result, there is a problem that proper sewing cannot be performed by the sewing machine.

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