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Bobbin thread winder of sewing machine and sewing machine

A technology of a winding device and a sewing machine, which is applied in the direction of bobbin winding in the sewing machine, sewing machine components, sewing equipment, etc., can solve the problem of not being able to accurately grasp the winding amount of the lower thread of the bobbin, and achieve the effect of reducing the workload of the work.

Active Publication Date: 2018-05-22
JUKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned lower thread winding device, only the outer diameter of the lower thread wound on the bobbin is uniformized.
[0006] Therefore, since the bobbin winding amount of the bobbin fluctuates depending on the type and thickness of the bobbin, it is impossible to accurately grasp the bobbin winding amount.

Method used

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  • Bobbin thread winder of sewing machine and sewing machine
  • Bobbin thread winder of sewing machine and sewing machine
  • Bobbin thread winder of sewing machine and sewing machine

Examples

Experimental program
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Embodiment Construction

[0054] [Outline of Embodiments of the Invention]

[0055] Next, a sewing machine according to the present invention will be described with reference to the drawings. figure 1 is a perspective view of the sewing machine 100.

[0056] In addition, the sewing machine 100 of this embodiment is capable of so-called free movement sewing, that is, the sewing machine 100 can be freely moved along a horizontal plane by a holding table that holds the clothing material of the sewing object in a horizontally stretched state. The sewing operator sews the clothing while moving the sewing machine 100 arbitrarily.

[0057] In addition, in this embodiment, illustration of a holding stand and description of a structure are the same as a well-known holding stand, and are abbreviate|omitted.

[0058] The sewing machine 100 has: a needle bar vertical movement mechanism that moves the needle bar 13 holding the sewing needle 12 at the lower end up and down; a kettle mechanism that catches the uppe...

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PUM

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Abstract

A bobbin thread winder detects bobbin winding amount more accurately. The bobbin thread winder (50) of a sewing machine includes a bobbin winder spindle (53) holding a bobbin (B) and a driving mechanism to apply a drive force to the bobbin winder spindle (53), comprises a time measuring unit to measure an bobbin-thread winding execution time with respect to the bobbin (B), and a bobbin-thread winding amount calculating unit which calculates a winding amount of the bobbin based on the bobbin-thread winding execution time with respect to the bobbin measured by the time measuring unit. In the bobbin thread winder, since the bobbin-thread winding execution time was measured by the time measuring unit, and the bobbin winding amount of the bobbin is calculated based on the bobbin-thread windingexecution time by the bobbin-thread winding amount calculating unit, it is possible to detect the bobbin winding amount of the bobbin accurately regardless of the type and thickness of the bobbin thread.

Description

technical field [0001] The invention relates to a lower thread winding device of a sewing machine and the sewing machine. Background technique [0002] Currently, a bobbin thread winding device mounted on a sewing machine has: a driving wheel whose outer circumference abuts against a driving pulley equipped on the upper shaft of the sewing machine; a bobbin that rotates integrally with the driving wheel; The bobbin is rotatably supported; the bobbin lever circumscribes the lower thread wound on the bobbin installed on the bobbin bobbin; the cam member performs a rotational movement coaxially with the bobbin bobbin; and the cam follower has The concave portion fitted with the protrusion of the cam member is integrally connected with the rotating arm (for example, refer to Patent Document 1). [0003] Furthermore, in the above-mentioned lower thread winding device, if the winding of the lower thread is performed by transmitting the torque from the upper shaft of the sewing ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B59/02
CPCD05B59/02
Inventor 白石笃史木下伸明南洁
Owner JUKI CORP
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