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Sewing machine

A sewing machine and sewing needle technology, which is applied in the direction of sewing machine components, sewing machine thread take-up devices, sewing equipment, etc., to improve reliability and achieve the effect of operating efficiency

Inactive Publication Date: 2007-10-17
JUKI CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, in the case of the above-mentioned combined feed sewing machine, if the thickness of the object to be sewn increases, even if the sewing needle stops at the upper position, there is a possibility that the front end of the sewing needle is inserted into the needle hole formed on the upper feed foot. When the state stops

Method used

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Embodiment Construction

[0028] Hereinafter, the embodiments of the present invention will be described in detail according to the accompanying drawings 1 to 11 .

[0029] In this embodiment, as a sewing machine, a combined feed sewing machine will be described as an example. The combined feed sewing machine is, for example, a sewing machine as follows: in order to prevent the object to be sewn from shifting along with the feeding action, the sewing needle is moved up and down by a needle up and down movement mechanism, the needle is wobbled by a needle oscillating mechanism, And the feeding action that is produced by the upper feeding mechanism and the lower feeding mechanism is synchronized, and the sewing needle is inserted into a thicker sewing object (for example, leather goods) to feed. Here, in the following description, the direction along the feed direction (arrow F) is defined as the X-axis direction (front-rear direction), and the longitudinal direction of the sewing machine arm 8 perpendic...

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Abstract

The invention increases sewing quality. The integrated feed sewing machine contains pin up-and-down movement mechanism, pin swing mechanism, lower feed mechanism, upper feed mechanism, press mechanism, thread-cutting mechanism, thread-taking-up mechanism and height adjustment mechanism adjusting up-and-down travels of upper feed foot and presser foot by upper feed mechanism. Height adjustment electromotor is set as rotating driving source of the height adjustment mechanism. The control part drives the height adjustment electromotor to adjust the height to set the distance between the upper feed foot and the pin plate to 0 after the thread-cutting mechanism cuts the thread and is ready to drive the thread-taking-up instrument. So the thread-catching part of thread-taking-up instrument is ensured to pass through the clearance between lower end of the pin and the upper feed foot. The cutted terminal of top thread can be taken up to the upwards of the upper feed foot, thereby shortening the length of residual terminal of top thread sewed in the sewed things after thread-cutting.

Description

technical field [0001] The present invention relates to a sewing machine, in particular to a sewing machine which synchronously feeds needles and feeds up and down to perform integrated feeding. Background technique [0002] Conventionally, there is known a so-called combined-feed sewing machine that feeds a sewing object by synchronizing a needle feed mechanism, a lower feed mechanism, and an upper feed mechanism (for example, refer to Patent Document 1). [0003] The combined-feed sewing machine has: a pressing mechanism having a presser foot that presses the object to be sewn from above; a lower feed mechanism that feeds the object to be sewn using lower feed teeth that contact the object from below; The upper feed mechanism, which utilizes the upper feed foot that abuts the object to be sewn alternately with the presser foot from above, and that is synchronized with the above-mentioned needle feed mechanism to swing, so as to feed the object to be sewn; The lower feed m...

Claims

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Application Information

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IPC IPC(8): D05B1/00D05B27/00D05B49/00D05B65/00
CPCD05B27/06D05B65/06
Inventor 高桥正人
Owner JUKI CORP
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