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Sewing machine

A sewing machine and action mechanism technology, which is applied to sewing machine components, sewing equipment, cloth feeding mechanisms, etc., can solve the problem that the sewing machine cannot sew efficiently, and achieve the effect of preventing the reduction of sewing quality and improving efficiency.

Active Publication Date: 2013-09-11
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the sewing machine may not be able to sew efficiently

Method used

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Examples

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Embodiment Construction

[0039] Hereinafter, a sewing machine 1 according to a first embodiment of the present invention will be described with reference to the drawings. figure 1 The upper side, the lower side, the right side, the left side, the front side, and the back side of the paper are the upper side, the lower side, the right side, the left side, the front side, and the rear side of the sewing machine 1, respectively. The sewing machine 1 includes a base portion 2 , a column portion 3 , and an arm portion 4 . The base portion 2 is a base of the sewing machine 1 . The base part 2 is attached to the recessed part (not shown) in the upper surface of the table 20 from above. The column part 3 extends upward from the right end of the base part 2 . The arm part 4 extends leftward from the upper end of the column part 3 and is opposite to the upper surface of the base part 2 . The machine arm 4 is provided with a presser foot 17 under its left end and holds a needle bar 7 inside. Presser foot 17 ...

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PUM

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Abstract

An object of the present invention is to provide a sewing machine capable of increasing the efficiency of sewing operations. The sewing machine comprises a main motor and a cloth feeding motor. The main motor allows needle moving up and down. The main motor allows a feeding tooth moving up and down. The cloth feeding motor allows the feeding tooth moving forward and backward. A CPU of the sewing machine acquires the cloth thickness of the cloth. When the cloth thickness is below a threshold, the CPU performs drive control on the main motor and the cloth feeding motor, so as to drive the feeding tooth according to a track for a thin object. When the cloth thickness is above the threshold, the CPU performs drive control on the main motor and the cloth feeding motor, so as to drive the feeding tooth according to a track for a thick object. The starting time of the feeding tooth moving along the track of the thick object is later than that of the feeding tooth moving along the track of the thin object. The ending time e of the feeding tooth moving along the track of the thick object is earlier than that of the feeding tooth moving along the track of the thin object.

Description

technical field [0001] The invention relates to a sewing machine capable of changing the motion track of a feeding dog. Background technique [0002] There is a sewing machine that can change the trajectory of the feed dog according to the thickness, material, etc. of the cloth. The sewing machine includes a mechanism for adjusting the drive mechanism of the feed dog. Through the adjustment of the mechanism by the operator, the sewing machine changes the trajectory of the feed dog. The sewing machine described in Japanese Patent Laid-Open Publication No. 42270 of 2000 includes an eccentric cam of an adjusting body for adjusting a horizontal feed shaft. The eccentric cam is a mechanism for adjusting the drive mechanism of the feed dog. The operator manually adjusts the phase of the eccentric cam, and the sewing machine changes the motion trajectory. The operator can adjust the phase of the eccentric cam without using tools such as a screwdriver. [0003] The sewing machi...

Claims

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Application Information

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IPC IPC(8): D05B27/02
Inventor 加藤雅史竹村徹
Owner BROTHER KOGYO KK