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Control device for sewing machine

A technology for a control device and a sewing machine, which is applied to the control device for a sewing machine, sewing machine components, sewing equipment, etc., can solve problems such as breakage, and achieve the effect of preventing breakage.

Active Publication Date: 2007-04-11
BROTHER KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When this kind of vibration occurs near the time when the needle reaches the needle hole, there is a problem that the vibrating needle comes into contact with the needle hole forming member (needle plate, feed dog, etc.) and breaks.

Method used

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  • Control device for sewing machine
  • Control device for sewing machine
  • Control device for sewing machine

Examples

Experimental program
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Embodiment Construction

[0049] DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the drawings showing the best embodiments.

[0050] In the sewing machine control device of the present invention, the prohibition period for prohibiting the operation of the feed switching mechanism for switching the feeding direction of the processed cloth is preset. During the period other than the permit, to prevent the vibrating sewing needle from contacting with the pinhole forming member and being damaged when the feeding direction is switched.

[0051] As shown in Fig. 1 and Fig. 2, the needle-feed sewing machine M includes a machine frame 1 having a bottom plate 1a, a column 1b, and a casing 1c. The sewing machine main shaft 2 and the pendulum shaft 3 are arranged inside the casing 1c, and the machine head 1d is provided at the front end of the casing 1c. The sewing machine main shaft 2 is driven to rotate about its axis by a sewing machine motor 75 ...

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PUM

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Abstract

A control device for sewing machine, predetermines that: during the forbidden period that the feed switch mechanism is forbidden to switch in feeding direction during the period that the main shaft rotates one circuit, when the feeding switch indicating part receives the switch indicating from the feeding direction, the feeding switch mechanism will not been acted until wait for the period except the forbidden period. The forbidden period is predetermined in the period with big libration of the needle bar and sewing needle generated with the action of the feeding switch mechanism, by making the feeding switch mechanism act in the period exception the forbidden period, namely the period with little libration, then not restraining the libration but preventing the sewing needle from contacting with the component formed by the needle hole in the big libration status, not only realizing favorable action responsibility of the feeding switch mechanism, keeping the feeding switch mechanism reliably at the feeding position, but also preventing the depreciation of the sewing needle reliably.

Description

technical field [0001] The present invention relates to a control device for a sewing machine, in particular to a sewing machine which is controlled so that a feeding switching mechanism for switching the feeding direction of a processed cloth can only operate during a permitted period other than a preset prohibition period during one rotation of the main shaft of the sewing machine control device. Background technique [0002] There is a sewing machine with the following structure, including: a feeding mechanism with a feeding dog that selectively feeds processed cloth to either the forward feeding direction or the reverse feeding direction, a feeding switching mechanism that can switch the feeding direction of the feeding mechanism, And a feeding switching instruction part for instructing the switching of the feeding direction of the feeding switching mechanism. Especially in this sewing machine disclosed in Japanese Patent Application Laid-Open No. 58-192574 (Japanese Pa...

Claims

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Application Information

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IPC IPC(8): D05B69/14D05B27/00
Inventor 堀部美彦
Owner BROTHER KOGYO KK
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