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Keyhole sewing machine

A sewing machine and buttonhole technology, which is applied to sewing machine components, control devices for sewing machines, sewing equipment, etc., can solve problems such as hindering threading operations, and achieve the effect of improving the quality of buttonhole stitches

Inactive Publication Date: 2010-09-29
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Knife near the needle prevents threading

Method used

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  • Keyhole sewing machine
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Examples

Experimental program
Comparison scheme
Effect test

example 3

[0195] The buttonhole sewing machine M includes a cutter 51 movable in the front-rear direction. Modification 3 facilitates the threading work of passing the needle thread 33 through the needle 32 by moving the cutter 51 in the front-rear direction.

[0196] Modified buttonhole sewing machine M includes Figure 24 Operation panel 4 shown. As an operation unit, the operation panel 4 includes a threading key 111 (corresponding to an avoidance instruction unit), a selection key 113, a minus key 120, a plus key 121, an input key 122, and a reset key 123 (corresponding to a return instruction unit). As a display unit, the operation panel 4 includes LEDs (Light Emitting Diodes) 112 , 114 to 117 and an image display unit 119 . The operation panel 4 includes a notification buzzer 124 (corresponding to a notification unit).

[0197] The operator operates the threading key 111 when carrying out the threading work of passing the needle thread 33 through the needle 32 . The LED 112 li...

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PUM

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Abstract

The invention provides a keyhole sewing machine, which comprises a cutting knife moving back and forth. The cutting knife descends at different moving position to form a buttonhole on a processing cloth. The operator can form the buttonholes with different length under the condition of no replace of the cutting knife. The cutting knife can form the buttonholes on an immobile processing cloth or a processing cloth moving at low speed. The buttonholes can be formed with higher precision with no influence of the movement of the processing cloth. The cutting knife can not prevent the movement of the processing cloth forming the keyhole stitch seam. The keyhole sewing machine can form the high-quality keyhole stitch seam. The cutting knife avoids the indication of an indicating part to move to the avoidance position which is a position where the cutting knife departs from a needle. The cutting knife moving to the avoidance position can not prevent the threading work for forcing a needlework to penetrate through the needle. An operator can easily perform the threading work with high efficiency.

Description

technical field [0001] The present invention relates to a buttonhole sewing machine for forming buttonhole stitches on processed cloth. Background technique [0002] A buttonhole sewing machine forms a buttonhole in a processed cloth and performs lockstitching around the formed buttonhole. A buttonhole sewing machine includes a feed mechanism, a cutter and a needle. The processing cloth moves forward and backward on the base along with the action of the cloth feeding mechanism. The cutter forms buttonholes by descending to the processing cloth and cutting the processing cloth. The needle is raised and lowered to create a keyhole stitch around the buttonhole. [0003] In the buttonhole sewing machine described in Japanese Laid-Open Patent Publication No. 128578, the cutter is lowered multiple times to form buttonholes of different lengths without changing the cutter. The cutter descends towards the moving processing cloth. The position of the buttonhole formed by the cut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B3/08D05B37/06D05B69/00
Inventor 西村和人柴田到野村悦造蒲野淳
Owner BROTHER KOGYO KK
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