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Lower shaft unit and sewing device

A lower shaft and spline shaft technology, applied in the direction of sewing machine control devices, sewing equipment, sewing machine components, etc., can solve the problems of broken needles, broken threads, skipped stitches, etc., and achieve the effect of not being easy to deviate

Active Publication Date: 2020-07-17
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, in the sewing device, sometimes the tip of the hook cannot catch the loop of the upper thread, resulting in skipped stitches.
In addition, in this case, in the sewing machine, the tip of the hook may collide with the needle, resulting in breakage of the tip, breakage of the needle, thread breakage, and poor thread take-up.

Method used

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  • Lower shaft unit and sewing device
  • Lower shaft unit and sewing device
  • Lower shaft unit and sewing device

Examples

Experimental program
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Effect test

Embodiment Construction

[0034] The lower shaft unit of the sewing device of the present invention has any one of a shuttle hook and a rotary hook as a shuttle. Referring to the drawings, the following embodiments will be described in order: the first embodiment when the shuttle is a rotary hook, the second embodiment when the shuttle is a shuttle, and the third embodiment different from the first embodiment when the shuttle is a rotary hook. . In the following description, left and right, front and rear, and up and down shown by arrows in the drawings are used. In the following description, the same reference numerals are assigned to the same structures in different embodiments.

[0035] A schematic configuration of the sewing device 1 according to the first embodiment will be described. Such as figure 1 As shown, the sewing device 1 has an upper shaft unit 2, an upper spline shaft 3, a lower shaft unit 4, a lower spline shaft 5, an X-axis moving mechanism 6, a Y-axis moving mechanism 7, a synchroni...

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PUM

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Abstract

The present invention relates to a lower shaft unit and a sewing device. The lower shaft unit of the sewing device has a shuttle mechanism for driving a shuttle having a shuttle tip on the outer periphery and a housing that accommodates the shuttle mechanism; the lower shaft unit is capable of moving the housing in the axial direction of the lower spline shaft of the sewing device.. The lower shaft unit has a through hole, a conversion mechanism, and a lower shaft. The lower spline shaft can penetrate the through-hole so as to penetrate through the housing. The conversion mechanism is configured to convert the rotational force about the axis of the lower spline shaft penetrating through the through hole into a rotational force about a vertical axis which is perpendicular to the extending direction of the needle bar and perpendicular to the axis of the lower spline shaft. The lower shaft is connected with the conversion mechanism and the shuttle mechanism, and rotates around the vertical axis.

Description

technical field [0001] The present invention relates to a lower shaft unit and a sewing device. Background technique [0002] The sewing device described in Japanese Utility Model Publication No. 1984 No. 174167 has an upper shaft unit, a lower shaft unit and a timing belt, and the sewing device is used for sewing larger cloths such as airbags and car seats. The upper shaft unit can move along the extending direction of the upper shaft, and the lower shaft unit can move along the extending direction of the lower shaft. The upper shaft unit has a needle bar mechanism, a thread take-up mechanism, and the like that are driven by rotation of the upper shaft. The lower shaft unit has a shuttle mechanism driven by rotation of the lower shaft. The shuttle mechanism has a shuttle having a tip on the outer periphery, and the shuttle mechanism rotates on a rotation axis parallel to the direction in which the lower shaft extends. The synchronous belt is erected on the upper shaft an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B57/30D05B69/02
Inventor 鬼头宏明田川祐二
Owner BROTHER KOGYO KK