Thread adjusting device of sewing machine

A thread adjusting device and sewing machine technology, which is applied in the direction of sewing machine control devices, sewing machine components, sewing machine loop mechanisms, etc., and can solve problems such as difficulty in stably imparting tension

Inactive Publication Date: 2009-02-25
YAMATO SEWING MASCH MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In this thread adjusting device with a frictional resistance type thread adjusting device, the amount of tension imparted to the upper thread can be changed by adjusting the thrust of the energizing device and increasing or decreasing the pushing force of the thread adjusting disc. However, if the operation is performed under the state of re...

Method used

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  • Thread adjusting device of sewing machine
  • Thread adjusting device of sewing machine
  • Thread adjusting device of sewing machine

Examples

Experimental program
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Embodiment Construction

[0037] The invention will be described in detail below with reference to the drawings showing preferred embodiments. figure 1 It is a perspective view of the appearance of a Z-stitch sewing machine with a thread adjusting device according to the present invention.

[0038]Z-shaped stitch sewing machine 1, as shown in the figure, comprises: a sewing machine table 10, a foot post 11 erected substantially vertically from one side (right side) of the sewing machine table, and a base connected to the foot post 11 The upper end is a sewing machine arm 12 extending in the other direction (leftward) along the top of the sewing machine table 10 . At the front end (left end) of the sewing machine arm 12, facing downward and facing the needle plate 13 arranged on the front end (left end) of the sewing machine table 10, the needle bar 14 is suspended and supported. Pin 15 is installed.

[0039] The needle bar 14 is connected to an unshown needle bar driving mechanism provided inside the...

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PUM

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Abstract

This invention provides a thread adjusting device of sewing machine, which is capable of stably giving minute tension to the top thread provided to the needle through a balance, and is capable of sewing thin cloth, soft cloth with good quality but without generating stitch defect. The thread adjusting device comprises an auxiliary thread adjusting device for giving preparation tension to the top thread provided to a rotation resistance main thread adjusting device (4), including: a rotary cylinder (51) that winds and keeps several rings top threads in the peripheral width direction in a spaced way, an extruding spring (53) applying thrust to the rotary cylinder (51) and a regulating knob that adjusts the spring of the extruding spring (53). In addition, a guide groove is formed in a thread passage component (8) extending in the width direction of the rotation cylinder (41). The top thread (2) wound on the rotation cylinder (51) is hanged in the guide groove. The perimeter of the top thread (2) is gradually shortened from the thread supply source to the main thread adjusting device (4).

Description

technical field [0001] The present invention relates to a thread adjusting device equipped on a sewing machine for applying tension to an upper thread (needle thread) provided to a needle, and in particular to a thread adjusting device capable of imparting a slight tension suitable for sewing thin and soft fabrics. Background technique [0002] In sewing with a sewing machine, it is necessary to apply appropriate tension to the upper thread provided to the needle and the lower thread provided to the lower thread winding device such as a kettle and a looping device (ル-パ). In various sewing machines, in order to A thread adjustment device is installed to achieve this tension application. [0003] Most thread adjusting devices that apply tension to the upper thread have a pair of adjusting discs, and an energizing device (spring, solenoid) that causes these adjusting discs to push against each other, and the upper thread clamped between the adjusting discs when When pulled out...

Claims

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Application Information

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IPC IPC(8): D05B47/04D05B47/00
CPCD05B47/04D05B57/30D05B63/02D05B69/30D05D2305/36
Inventor 河合正男
Owner YAMATO SEWING MASCH MFG CO LTD
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