Sewing machine with a bobbin case changing device

A sewing machine and bobbin case technology, which is applied to sewing machine components, sewing machine center bobbin winding, sewing equipment, etc., to achieve the effect of compact bobbin case replacement device and shorten non-production time

Active Publication Date: 2019-04-02
PFAFF INDUSTRIESYSTEME & MASCH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Changes in temperature can cause this type of damage

Method used

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  • Sewing machine with a bobbin case changing device
  • Sewing machine with a bobbin case changing device
  • Sewing machine with a bobbin case changing device

Examples

Experimental program
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Embodiment Construction

[0021] exist figure 1 In the only partial view, an example of a sewing machine 1 constructed as a double backtack sewing machine is shown, the housing 2 of which has a lower housing-shaped so-called base plate, from which the stand 3 extends approximately vertically upwards. The upper end of the stand is connected to an arm substantially parallel to the bottom plate 2 .

[0022] The sewing machine has an arm shaft supported in the arm, which is also not present in the same way as other basic components of the sewing machine described below. figure 1 shown in or as the case may be only partially or greatly simplified. The arm shaft drives a needle bar that can move back and forth in an oscillating manner, and a needle for accommodating (not shown) upper thread can be fixed on the needle holder of the needle bar. Arranged on the base plate 2 is a hook device 3 with a rotary hook, the rotary movement of which is synchronized with the oscillating movement of the needle bar. The...

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PUM

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Abstract

The invention relates to a sewing machine for stitching back stitches, provided with a needle bar for receiving a needle guiding an upper thread, and comprising a rotary shuttle (5) in which a bobbincase (4) comprising a bobbin guiding a lower thread can be accommodated, said sewing machine also comprises a bobbin case changing device (8) enabling a bobbin case (4) to be removed from a housing (9) and to be introduced into the rotary shuttle (5). The aim of the invention is to improve the functional reliability of said type of sewing machine with a bobbin case changing device, such that the bobbin case changing device (8) is secured to an upper part of the machine frame (2) of the sewing machine.

Description

technical field [0001] The invention relates to a sewing machine for sewing backstitches, which is provided with a needle bar for accommodating a needle guiding an upper thread, and has a rotary hook in which a A bobbin case with a bobbin that guides the bobbin thread and is equipped with a bobbin case changing device, by means of which a bobbin case can be removed from a magazine where a large number of bobbin cases can be arranged and the bobbin case A shell can be inserted into the rotary hook. Background technique [0002] Sewing machines form seams by using a needle in an oscillating back and forth motion that guides the upper thread. In a double backstitch sewing machine, the needle guides the upper thread, which is interwoven into a double backstitch with the preparation yarn for the bobbin thread arranged on the bobbin. The bobbin is in a revolving bobbin which performs a rotational movement relative to the bobbin and in each stitch the needle catches the upper thr...

Claims

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Application Information

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IPC IPC(8): D05B59/04D05C11/16
CPCD05B59/04D05C11/16
Inventor K-L·曼纽尔
Owner PFAFF INDUSTRIESYSTEME & MASCH AG
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