Embroidery machine

Abstract

The invention provides an embroidery machine. A tension of a surface wire is adjusted by utilization of a simple structure in the embroidery machine. The embroidery machine comprises a plurality of embroidery needles, a plurality of tension sections (digital variable tension sections (24)) and a driving section (an electromagnetic solenoid (32), a driving arm (33) and an action shaft (35)). Surface wires are inserted into the plurality of embroidery needles. The tension sections applies a tension to the surface wires inserted into the plurality of embroidery needles. The plurality of embroidery needles move transversely during selection and buckle with the plurality of tension sections (digital variable tension sections (24)) alternatively. The driving section provides power to the buckled tension sections (digital variable tension sections (24)).

Description

technical field [0001] The present invention relates to an embroidery machine having a tensioning part that applies tension to an upper thread. Background technique [0002] Conventionally, with regard to embroidery machines, the thickness, material, and color of threads used are different, and the thickness and material of embroidery objects such as cloth are also different. Therefore, a method has been proposed in which a tension of the upper thread is applied to the thread path of each embroidery needle on an embroidery head in which a plurality of embroidery needles are arranged (for example, refer to Patent Documents 1 to 3). [0003] Patent Document 1 describes a method of switching the tension of the upper thread between two modes, a strong mode and a weak mode, using a pulse motor. [0004] Patent Document 2 describes a method of turning on / off the tension of the noodle thread using an electronic solenoid. [0005] Patent Document 3 describes a method of controllin...

AI Technical Summary

Problems solved by technology

[0010] However, each embroidery head of the embroidery machine has a plurality of embroidery needles and complicated mechanisms such as a needle bar driving part, a balance, and a tensioning part respectively arranged correspondingly to them.

Therefore, when adjusting the tension of the upper thread as described in the above-mentioned Patent Documents 1 to 3, the structure of the driving source for tension adjustment becomes more complicated.

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