Thread adjusting device for sewing machine

A thread adjusting device and sewing machine technology, applied in the direction of sewing machine control devices, sewing machine components, program-controlled sewing machines, etc., can solve problems such as tension, operation interruption, etc., to suppress heat generation, eliminate operation interruption, and realize sewing operation efficiency Effect

Inactive Publication Date: 2008-02-13
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, depending on the predetermined time counted by the operation timer, there is a problem that the presser is lowered and acts on the upper thread while t

Method used

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  • Thread adjusting device for sewing machine
  • Thread adjusting device for sewing machine
  • Thread adjusting device for sewing machine

Examples

Experimental program
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Embodiment Construction

[0030]

[0031] Next, a first embodiment of the present invention will be described with reference to the drawings. This embodiment is an example in which the present invention is applied to a thread adjusting device of a buttonhole sewing machine for forming buttonhole stitches.

[0032] As shown in FIG. 1 , the buttonhole sewing machine M is installed on the sewing machine bed 4 . A control box 6 is provided at the right end portion (the direction of the arrow in FIG. 1 is the front) on the lower side of the sewing machine table 4 . An operation panel 7 for inputting various pattern data for forming keyhole stitches (not shown) and buttonholes is provided on the front portion of the control box 6 . The control box 6 has a control device 8 (see FIG. 7 ) for performing various sewing controls. A sewing machine motor 5 is provided at the central portion of the lower side of the sewing machine table 4 . The sewing machine motor 5 is driven to rotate a sewing machine main sh...

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PUM

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Abstract

A thread tension guide apparatus for a sewing machine is provided to inhibit the heat emission of a tension discharge actuator, thereby enhancing the efficiency of the sewing work. The thread tension guide apparatus comprises a tension releasing device. In the tension releasing device, an output shaft protruded by the operation of a tension releasing solenoid separates a pair of thread control dishes and releases the tension of the upper thread. In the thread control dish, the tension releasing device drives to the tension release state and thereafter the tension release state is maintained by a tension maintaining device. At the state that the tension releasing state is continuously maintained by the tension releasing device, a stop device stops the operation of the tension releasing solenoid. The tension maintaining device comprises a tension releasing actuator for switching a combination member. A control box(6) is installed at the lower right end of a sewing machine table(4).

Description

technical field [0001] The invention relates to a thread adjusting device of a sewing machine for imparting tension to an upper thread. Background technique [0002] Conventionally, thread adjusting devices have been used in various sewing machines such as lockstitch sewing machines and buttonhole sewing machines. The thread adjusting device applies tension to the upper thread on the thread supply path from the thread supply source to the needle through the thread take-up lever. The thread adjusting device is provided with a thread adjusting knob for adjusting the tension of the upper thread. A user (operator) performs a sewing operation corresponding to sewing elements such as the type of cloth to be processed, the thickness of the cloth, and the pitch of feed by operating the thread adjustment knob. [0003] For example, there is a thread adjusting device disclosed in Japanese Patent Laid-Open No. 24083, 2014. The thread adjusting device has a thread adjusting shaft whi...

Claims

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Application Information

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IPC IPC(8): D05B47/04
CPCD05B19/12D05B47/04D05B63/00D05B69/30
Inventor 杉原良英
Owner BROTHER KOGYO KK
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