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sewing machine

A sewing machine and groove technology, which is applied in the field of sewing machines, can solve the problems that the hook tip cannot catch the upper thread, the upper thread is slack without sufficient margin, residue, etc.

Active Publication Date: 2020-11-10
JANOME CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In the case of manual operation of the flywheel, the hooking part cannot catch and pull the upper thread in the first needle actuation cycle, and there is not enough slack for the upper thread. Pulling up, the supply of a considerable amount of coil is insufficient, and the hook tip cannot catch the upper thread
That is, there is still the possibility of skipped stitches in the operation cycle of the first stitch

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0121] (The overall configuration of the sewing machine)

[0122] A sewing machine according to a first embodiment will be described in detail with reference to the drawings. The sewing machine 1 shown in Fig. 1(a) and Fig. 1(b) is a household, special-purpose or industrial device for sewing cloth 100. The needle 3 is dropped on the cloth 100 placed on the needle plate 21 to make the cloth 100 sew. The upper thread 200 interweaves with the lower thread 300 to form a stitch. The sewing machine 1 includes: a needle bar 31 that supports the needle 3 at its tip and reciprocates together with the needle 3; and a shuttle 5 that has a tip on the outer periphery and rotates together with the tip.

[0123] The needle bar 31 extends vertically from the machine head 1 a of the sewing machine 1 toward the needle plate 21 , and supports the needle 3 at the front end on the needle plate 21 side. The user pulls out the upper thread 200 from the winding shaft, hangs it into the groove 41 fo...

no. 2 Embodiment approach

[0178] A sewing machine 1 according to a second embodiment will be described in detail with reference to the drawings. The same symbols are assigned to the same configurations and functions as those of the first embodiment, and detailed description thereof will be omitted.

[0179] As shown in FIG. 13( a ) and FIG. 13( b ), the presser foot 22 of the sewing machine 1 can move up and down in the direction of contacting and separating from the cloth 100 . As the presser foot 22 rises, the cloth 100 and upper thread 200 sandwiched between the needle plate 21 and the presser foot 22 are released. Therefore, while the presser foot 22 is raised, the cloth 100 and the upper thread 200 can be exchanged.

[0180] Such a presser foot 22 is detachably mounted on the front end of the press bar 221 . The sole of the presser foot 22 faces the needle plate 21 through the cloth 100 . The pressing rod 221 is arranged on the sewing machine frame, extends vertically toward the needle plate 21...

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PUM

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Abstract

The invention provides a sewing machine. In a sewing machine equipped with a balance that traverses the upper thread and catches and pulls the upper thread, it prevents thread slippage and stitch skipping during the operation cycle of the first stitch. The balance (7) included in the sewing machine (1) traverses the thread path (4) of the upper thread (200) and catches and pulls the upper thread (200). In this sewing machine (1), there is provided a shutter (820) that can move in a way that can be interposed in a channel (41) that has a thread path (4) in the deep part, and can When the upper line (200) is hooked in, the baffle (820) is interposed in the tank (41) when the upper line (200) is hung in.

Description

technical field [0001] The present invention relates to a sewing machine including a balance that moves a thread catcher so as to cross a needle thread, and catches and pulls the thread catcher by the thread catcher. Background technique [0002] A sewing machine forms stitches by forming a loop of the upper thread and inserting the lower thread through the loop of the upper thread to interweave the upper thread and the lower thread. The upper thread is passed through the needle from the bobbin, and the lower thread is accommodated in a shuttle having a tip while being wound around the bobbin. The loop is formed by raising the needle with the upper thread from the bottom dead center. The hook tip of the shuttle catches the loop, and the hook rotates while the loop is caught, and the bobbin passes the upper thread, whereby the upper thread and the lower thread intertwine. Furthermore, here, as a preparatory stage for the sewing operation, the operator sets the bobbin on the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B47/04D05B53/00D05B51/00
CPCD05B47/04D05B51/00D05B53/00D05D2305/32
Inventor 白土宏树小池三喜夫
Owner JANOME CORP
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