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Sewing machine thread regulator controlled by solenoid valve

An adjustment device and sewing machine technology, applied in the direction of sewing machine components, tension devices, sewing equipment, etc., can solve the problems of incorrect control of thread tension, difficulties, etc., and achieve the effect of easy tension adjustment, rapid tension change, and small stroke

Inactive Publication Date: 2004-02-11
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to control the thread tension by controlling the energization amount of the proportional solenoid valve in the thread adjustment device whose stroke and driving force are related to the thread tension change, and there is a problem that the thread tension cannot be controlled correctly.

Method used

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  • Sewing machine thread regulator controlled by solenoid valve
  • Sewing machine thread regulator controlled by solenoid valve
  • Sewing machine thread regulator controlled by solenoid valve

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0033] Embodiments of the present invention will be described below with reference to the drawings.

[0034] As shown in FIG. 1 , the thread adjusting device 1 of this embodiment is provided on the frame portion 81 of the sewing machine 100, and is a device for supplying tension to the upper thread from the cantilever 82 on the upper thread supply source side. This sewing machine 100 is an industrial buttonhole lockstitch sewing machine for forming buttonhole lockstitches. Figure 9 Buttonhole escutcheon 90 shown. The button hole keyhole 90 is mainly composed of side seams 92, 92 arranged on the left and right sides of the button hole groove 91, and upper and lower reinforcement seams 93, 93 as stoppers. Clamp the cloth M with the slide plate 85 and the cloth press 86 and control it to be sent to the Y direction, and at the same time, the pin 84 is swung to the X direction by the pin pendulum mechanism (not shown) provided in the sewing machine support part 81 to form the key...

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PUM

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Abstract

To provide a device for stitch balancing thread tension of a sewing machine by an electromagnetic solenoid by which thread tension can be accurately controlled by using the solenoid without using an expensive voice coil meter. The device comprises a device for stitch balancing thread tension consisting of a pair of trays for stitch balancing thread tension consisting of a fixed tray and a movable tray and an electromagnetic solenoid providing a tension to a sewing thread by acting the movable tray is provided. In addition, the electromagnetic solenoid generates an approximately const. driving force in a specified stroke when loaded amt. of electricity is const. and a controllable movable stroke range of the movable tray of the device for stitch balancing thread tension is set within a specified stroke range and by controlling the amt. of electricity loaded to the electromagnetic solenoid, the tension of the sewing thread is controlled.

Description

technical field [0001] The present invention relates to a sewing machine thread adjusting device controlled by a solenoid valve for changing thread tension through electric control. Background technique [0002] Heretofore, as a sewing machine thread adjusting device for changing the thread tension by electric control, there is a sewing machine thread adjusting device equipped with a thread adjuster (adjusting dial, rotating tension, etc.) and a driving device acting on the thread adjuster. [0003] In the past, for example, a voice coil motor, a proportional solenoid valve, a combination of an air piston and a proportional solenoid valve, etc. have been used for this driving device. These drives are controlled electrically, for example, to increase or decrease the pressing force of the adjusting disc or to increase or decrease the load of the rotating tension rotating disc, thereby continuously changing the tension to the upper thread during sewing. [0004] However, the d...

Claims

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Application Information

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IPC IPC(8): D05B47/04D05B47/00
Inventor 横须贺进上野利夫田味一也椎名隆行
Owner JUKI CORP
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