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Double-lock type stitch sewing machine with rotation-proofing device for bobbin case

A sewing machine, double-lock technology, applied in the direction of sewing machine components, sewing machine ring mechanism, sewing equipment, etc., can solve the problem of the device that cannot see the bobbin case reversed, and achieve the effect of reducing the impact

Inactive Publication Date: 2008-11-26
DURKOPP ADLER AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Known a kind of double lock stitch type sewing machine by DE3644711C2, wherein the bobbin case that is supported in the shuttle body of a rotation is made with a cam in its upper part, and the spring bar that a position is fixed leans against on this cam, although with This anti-rotation device prevents the bobbin case from turning with the shuttle body, but there is no visible device to limit the bobbin case from reversing

Method used

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  • Double-lock type stitch sewing machine with rotation-proofing device for bobbin case
  • Double-lock type stitch sewing machine with rotation-proofing device for bobbin case
  • Double-lock type stitch sewing machine with rotation-proofing device for bobbin case

Examples

Experimental program
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Effect test

Embodiment Construction

[0039] The sewing machine 1 has a base plate 2 with an upright 3 extending upwardly therefrom and a right-angled arm 4 terminating in a machine head 5 . Mounted rotatably in the arm 4 is an arm shaft 6 , which drives a crank drive 7 with a thread take-up lever 8 in the machine head 5 . The crank drive mechanism 7 is in transmission connection with a needle bar 9 which is movably supported in the machine head 5 and which has a needle 10 at its lower end. Therefore, the needle 10 can be driven by the crank mechanism 7 to move up and down on a vertical axis. The needle 10 guides in the eye of the needle the thread conveyed from the loop 11 through the thread tensioner and the thread take-up lever 8, which is referred to below as sewing thread 12.

[0040] On the base plate 2, there is a panel 13 fixed by screws, on which a sewing product 14 is placed. The panel 13 is made with an opening 15 for a cloth pusher 16 having a needle hole 17 for the passage of a needle 10 . The push...

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PUM

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Abstract

A double lock stitch sewing machine is provided with a looper (18) held by a holder (58), provided with a bobbin case (21) internally supported rotatably and rotated around a vertical axis (26). The holder (58) is provided with a first rotation safety structure (56) blocking the accompanying rotation of the bobbin case (21) and a second rotation safety structure (57) limiting the return rotation of the bobbin case (21). The first rotation safety structure (56) forms a cantilever arm (45) apart from the cam provided on a floor plate bottom, wherein a abutting surface (46) for bearing the bobbin case (21) thereon is provided.

Description

technical field [0001] The invention relates to a double lockstitch sewing machine (Doppelsteppstichnaehmaschine) with an anti-rotation device for the bobbin case (Spulengehaeuse), which has a panel for sewing products, a hole formed in the panel or in the push dog The pinhole for the sewing needle to pass through is provided under the panel with a bearing seat with a shuttle that is rotatably supported inside it. The shuttle has a belt that rotates in the direction of rotation around a vertical axis and is rotatably mounted on The shuttle body of the bobbin case inside it, a fixed position fixing device, which has a first anti-rotation device used to prevent the bobbin case from following the rotation direction, and a first anti-rotation device used to limit the bobbin case along with the rotation A second anti-rotation device for rotational movement in the opposite direction. Background technique [0002] A double lock stitch sewing machine of this type is known from DE26...

Claims

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Application Information

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IPC IPC(8): D05B57/26D05B1/12D05B57/14D05B65/02
CPCD05B57/265D05B65/02D05B1/12
Inventor J·恩斯A·里弗尔
Owner DURKOPP ADLER AG
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