Dual-ring seam sewing machine

Abstract

The present invention provides a dual-ring seam sewing machine, which can adopt a handle type feed rate adjusting mechanism with good operation characteristic to not realize large-scale of the sewing machine arm as well as the sewing machine even if vertical pendulum looper relative to a plurality of needles, and can perform switch of compression sewing, fabric reverse feed, and the presence or absence of frilling. A third accommodating space (S3) is formed on the front end side of a first accommodating space (S1) ararnged on the sewing machine base (2), the third accommodating space (S3) is accommodated and configued with a first feeding mechanism (16) transferring the rotation of a sewing machine spindle (8) to a feed axis (9), and a handle type feed rate adjusting mechanism (39) adjusting the scope of the rotation angle through the handle operation is installed across the inside and outside of the front end wall (2b) of the machine base.

Description

technical field [0001] The present invention relates to a double loop sewing machine, and more specifically, to a double loop sewing machine which can be provided with a handle-type feed mechanism even when a longitudinal swing looper is provided for a plurality of needles . Background technique [0002] So far, there is no sewing machine that is provided with a handle-type feeding mechanism that can change the feeding amount through handle operation in the double-loop sewing machine that adopts the vertical swing looper with respect to a plurality of needles. [0003] On the looper used for the double circular sewing machine, there is a sideways looper which is synchronous with the up and down movement of the needle thread and makes an elliptical motion in the left and right directions relative to the cloth feeding direction to produce stitches (for example, refer to Patent Document 1 ) and a vertical swing looper that moves back and forth parallel to the cloth feeding dir...

AI Technical Summary

Problems solved by technology

In this way, if Figure 20 As shown in (b), if the width X2 of the second storage space S2 is widened, the distance W between the position of the needle bar 74 of the sewing machine arm 73 and the standing portion (base end portion) of the sewing machine arm 73 will become longer. This will cause the enlargement of the sewing machine arm 73, and also cause the overall enlargement including the sewing machine arm 73 and the sewing machine stand 72.

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