Sewing machine with wire-cutting device
A sewing machine and thread cutting technology, which is applied in the direction of sewing machine components, sewing machine collar mechanism, sewing machine cutting thread mechanism, etc., can solve the problems of cutting edge sharpness, timeliness decline, installation (assembly difficulty, difficulty in ensuring cutting edge sharpness, etc.) problem, to achieve the effect of good edge sharpness
Inactive Publication Date: 2008-08-13
YAMATO SEWING MASCH MFG CO LTD
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Problems solved by technology
Not only that, but the clamping plate also needs to be installed on the narrow part of the back of the fixed knife on which the pressing mechanism is installed. Therefore, there is a problem that the installation of so many parts is complicated and the installation (assembly) operation itself becomes very difficult.
In addition, due to the large number of parts, the manufacturing errors and assembly errors of various parts are gathered together, which easily causes deviations in the elastic pressing force on the movable knife. As a result, there is a problem that it is difficult to ensure the desired Good and uniform cutting edge sharpness, and it is easy to produce deviations when adjusting the elastic pressing force, which cannot avoid the time-sensitive decline of cutting edge sharpness
Method used
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[0023]1 is a schematic perspective view of the whole sewing machine when the sewing machine with a thread cutting device according to the present invention is applied to a three-needle cylindrical sewing machine, and FIG. 2 is an exploded perspective view of the components of the thread cutting device. In this three-needle cylinder type sewing machine M, a built-in sewing machine main shaft, a needle drive mechanism, and a presser foot drive mechanism (because these parts are known, Therefore, the detailed structure and description thereof will be omitted) of the sewing machine housing portion 3 and the cylindrical bottom plate 1.
[0024] As shown in FIGS. 1 and 2 , this cylindrical base plate 1 is divided into a lower base plate portion 1A facing the upper opening and an upper cover plate portion 1B covering the upper opening of the lower base plate portion 1A. A plate-shaped inner cover 30 that can be clamped and fixed as shown in FIG. 3 is provided between 1A and the upper...
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The present invention provides a sewing machine having a tangent device, forming a slit of the upper and lower widths which thickness is identical or approximately equal to the thickness of the movable knife on the position more closing to the needle board back than the cutting edge of the stationary knife in the reciprocating driving moving path of the movable knife, the front parts of the movable knife is elastically push to the cutting edge side of the stationary knife via introducing the movable knife to penetrate movement in the slit, when cutting the line by the cutting function between the movable knife and the stationary knife, not only reducing the parts, realizing the lower coast and easier assembly, reasonable assembly, but also ensuring the excellent edge sharp capability, and maintaining the edge sharp capability for a long time.
Description
technical field [0001] The present invention mainly relates to a multi-needle cylinder type sewing machine suitable for sewing tubular parts such as T-shirt collars and cuffs and drapes, and particularly relates to a multi-needle sewing machine with the following structure: Sewing machines of the cylindrical type, etc.: having a cylindrical base plate suitable for sewing in a cylindrical portion, on the free end of which a needle plate is fixed, the needle plate having a plurality of needle drop holes perpendicular to the direction of the axis of the cylinder And the slots for the cloth feeding dogs that are arranged in front of and behind the needle drop hole and feed the cloth in the direction of the cylinder axis. A looper is provided on the lower part of the needle plate, and a thread cutting device is provided on the side of the needle plate. The thread cutting device is used for sewing After sewing, pull the needle thread and looper thread between the needle plate and th...
Claims
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IPC IPC(8): D05B65/00
CPCD05B37/06D05B63/02D05B65/02D05B65/06
Inventor 林田高幸射场隆史
Owner YAMATO SEWING MASCH MFG CO LTD