Midori Anzen Co., Ltd.

Midori Anzen Hougi Co., Ltd.

Hougi Corporation

Nobuhiro Nishi

Hideo Asao

Disclosed is a two-needle sewing machine that improves strength in a convex curve part by bringing a pair of stitches close together when sewing an item. A two-needle sewing machine includes a bed part; a column part; an arm part; a needle shaft that is disposed on the leading part of the arm part; two sewing needles that are attached to the needle shaft; two horizontal hooks that catch the respective needle thread loops of the two sewing needles; and a conveyor member that conveys a material to be sewn in a direction approximately orthogonal to the bed part. On the two-needle sewing machine, the sewing needle, which is positioned in a location distant from the column part, is disposed closer to the conveyance side of the material to be sewn than the sewing needle that is positioned in a location closer to the column part.

Two-needle sewing machine and two-needle sewing machine stitch forming method

To provide a seam of attractive appearance in which tightening force is increased and raveling are prevented drastically. A seam () is formed by two needles () juxtaposed in the direction at substantially right angles to the sewing direction (T), and consists of a chain seam () formed by a needle thread () passed through one needle (), and a lock seam () formed by a needle thread () passed through the other needle (). The loop () of a needle thread forming the chain seam () is passed through the loop () of a needle thread forming the lock seam () before tightening of stitch is performed, and a loop of the needle thread forming the chain seam located on a downstream side in the sewing direction is passed through the loop of the needle thread forming the upstream chain seam.

Seam, seam forming device, and seam forming method

The present invention provides a sewing machine that can perform zigzag sewing a cylindrical sewn article. A sewing machineincludes an approximately cylindrical guide memberthat guides a sewn article A, a sewing needlethat sews the cylindrical sewn article A, a holding memberthat holds the sewing needleapproximately vertically, a vertical hookprovided in the guide memberso that the direction of rotation is approximately perpendicular to the axial direction C of the guide memberand that catches the upper thread loop of the sewing needle, a rotary shaftthat rotates the vertical hook, and an operating meansthat moves the holding memberand the rotary shaftreciprocatingly at approximately the same time.

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Chofu, Japan

Nobuhiro Nishi