Sewing machine

A technology for sewing machines and changing mechanisms, applied in sewing machine components, sewing machines, program-controlled sewing machines, etc., can solve problems such as noise, and achieve the effect of easy operation

Inactive Publication Date: 2010-06-30
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the lower limit position of the intermittent presser foot is set to be in contact with the upper surface of the needle plate, there is a problem that the descending intermittent presser repeatedly hits the upper surface of the needle plate and generates noise.

Method used

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Examples

Experimental program
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Embodiment Construction

[0030] Hereinafter, the present invention will be described in detail with reference to the drawings showing preferred embodiments.

[0031] Such as figure 1 As shown, the sewing machine 1 includes a base 2, a support 3, and a machine arm 4. Pillar 3 from the rear end of base 2 (in figure 1 Center, the upper left is the rear) erect. The arm 4 extends forward from the upper end of the pillar 3. The main shaft 5 is arranged inside the arm 4 in the front-rear direction. Sewing machine motor 72 (reference Picture 10 ) The spindle 5 is driven to rotate.

[0032] Such as figure 1 As shown, the pressing rod 7 is provided at the front end of the arm 4. The pressing rod 7 protrudes below the arm 4. Such as figure 2 As shown, the needle bar 8 is arranged beside the pressing bar 7. The needle bar 8 protrudes below the arm 4. The pressing bar 7 and the needle bar 8 rise and fall synchronously. The needle 9 is detachably mounted on the lower end of the needle bar 8.

[0033] The intermi...

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PUM

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Abstract

The invention relates to a sewing machine with intermittent presser foot for pressing the machining cloth from above. When the wire winding process is started, a control device reads initial values stored in the RAM. The control device raises the intermittent presser foot. The intermittent presser foot raises to a position represented by the initial value (a position that the intermittent presserfoot does not contacted to the needle board during descending when the intermittent presser foot performs reciprocation, when rotation is performed along with the main shaft for wire winding). Subsequently, the control device starts up the sewing machine motor, to perform the wire winding process carried out by the winding mechanism. The control device waits for the opening operation of the startup pedal. When the opening operation of the startup pedal occurs, the control device stops the drive to the sewing machine motor. The control device descends the intermittent presser foot. The intermittent presser foot descends to a prescribed position (for example, a position wherein the intermittent presser foot is contacted to the needle board during descending).

Description

Technical field [0001] The present invention relates to a sewing machine with an intermittent presser foot that presses a processed cloth on a needle plate from above. Background technique [0002] The sewing machine described in Japanese Patent Publication No. 43360 of 2008 includes an intermittent presser foot. The intermittent presser foot moves up and down synchronously with the needle bar according to the driving of the spindle. The processing cloth will float off the needle plate due to friction with the rising needle. While the needle is rising, the lowered intermittent presser foot presses the processed cloth on the needle plate from above to prevent the processed cloth from floating. [0003] The sewing machine includes a changing mechanism. The changing mechanism changes the position (movement range) of the intermittent presser foot. The operator sets the range of movement of the intermittent presser foot according to the thickness of the fabric being sewn. During se...

Claims

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Application Information

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IPC IPC(8): D05B19/12D05B29/02D05B29/06D05B57/00
Inventor杉原良英
OwnerBROTHER KOGYO KK