CN2316326Y

CN2316326Y - Industrial sewing machine needle

Info

Publication number: CN2316326Y
Application number: CN 97244852
Authority: CN
Inventors: 于仁涛; 尚延斌
Original assignee: SHINAN YAWEI WELFARE NEEDLE FACTORY QINGDAO CITY
Current assignee: SHINAN YAWEI WELFARE NEEDLE FACTORY QINGDAO CITY
Priority date: 1997-11-13
Filing date: 1997-11-13
Publication date: 1999-04-28
Anticipated expiration: 2007-11-13

Abstract

The utility model relates to an industrial sewing machine needle. A needle bar is provided with a needle tip, a needle head, a needle hole, a short thread groove, a long thread groove, a needle handle, a pilot taper, etc. Both side surfaces of the long thread groove form an included angle alpha, the size of which is 38-40 DEG; the connecting parts respectively between the side surface and the bottom surface, the side surface and a circular arc surface form a circular arc shape, and the radius of the circular arc is 0.05-0.07 mm; the roughness of the inner surface of the long thread groove is R a 0.2 micrometers. The utility model the advantage of having small abrasion to a sewing machine without having the phenomena of thread cutting, roughing thread sewing, thread fusing, etc.

Description

Industrial sewing machine needle

The utility model relates to a kind of improvement of the industrial eedle structure that is used to sew, and is a kind of industrial sewing machine needle specifically.

Wire casing on the industrial sewing machine needle is used to guide feeded thread, and holds suture in groove, with frictional resistance that overcomes suture and sewing and the harmful heat that produces therefrom.Because traditional grooving method is to adopt Milling Process, makes groove face that tangible cutter trade be arranged, rough surface, its roughness is R _a3.2 being blade-like and being detained some, micron, notch edges be difficult to the thoroughly burr of removal, the bottom land back chipping, and shape meets at right angles.Thereby problems such as " sanding suture ", " secant ", " fuse " can take place in sewing, be difficult to satisfy the demand of sewing at a high speed.

The utility model purpose is to overcome the shortcoming in the above-mentioned technology, a kind of architecture advances is proposed industrial sewing machine needle, make and at a high speed in the sewing " sanding suture ", " secant ", " fuse " problem can not take place.

The utility model purpose is realized by following technical scheme:

This industrial sewing machine needle, front end at shank is needle point, syringe needle, a pin hole is arranged, on the front and back shank of pin hole present position stub is arranged, along axis is relative long wire casing arranged, be connected by the transition awl between shank and the needle handle with stub, one clamping plane is arranged on the needle handle, two side shapes that it is characterized in that the long wire casing on the shank are α in an angle, and side and intersection, bottom surface and side and periphery intersection are circular arc, and side and bottom surface are smooth, smooth, roughness is R _a0.2 micron.

Two sides and the bottom surface of long wire casing are out of square, and the angle α that forms between two sides is 38 °-40 °, and two sides and intersection, bottom surface and side and periphery intersection are strong for circle, and arc radius R is the 0.05-0.07 millimeter.

The utility model advantage is because surface ratio was Paint Gloss originally, between side and the bottom surface arc transition is arranged, in guiding feeded thread process, frictional resistance reduces, therefore the harmful heat that produces also reduces, and the problem of " sanding suture ", " secant ", " fuse " can not take place in sewing at a high speed.

Embodiment of accompanying drawings:

Fig. 1 is a kind of industrial sewing machine needle structure chart,

Fig. 2 is the A-A profile,

Fig. 3 is the profile that long wire casing position is arranged,

This industrial sewing machine needle, be on the shank (4) of needle point (1), syringe needle (2), pin hole (3), pin hole (3) one ends stub (9) to be arranged at the front end of shank (4), on the shank (4) of pin hole (3) other end long wire casing (5) is arranged, be connected by the transition awl (6) that has tapering between shank (4) and the needle handle (7), needle handle (7) go up with stub with simultaneously be the needle handle plane (10) of flat shape, end face is needle handle end (8), two of long wire casing side shapes α in an angle on the shank, the size of α is in 38 ° of-40 ° of scopes; Two sides of long wire casing and intersection, bottom surface and two sides and arc surface intersection are arc transition, and arc radius R is the 0.05-0.07 millimeter, and side and bottom surface are smooth smooth, and roughness is 0.2 micron.Because the improvement of this series structure, shape, sewing thread frictional resistance in long wire casing reduces, and is suitable for sewing at a high speed.

Claims

1, a kind of industrial sewing machine needle, front end at shank is needle point, syringe needle, a pin hole is arranged, on the front and back shank of pin hole present position stub is arranged, along axis is relative long wire casing arranged, be connected by the transition awl between shank and the needle handle with stub, one clamping plane is arranged on the needle handle, two side shapes that it is characterized in that the long wire casing on the shank are α in an angle, and side and intersection, bottom surface and side and periphery intersection are circular arc, and side and bottom surface are smooth, smooth, roughness is R _a0.2 micron.

2,, it is characterized in that the angle α between two sides of long wire casing is 38 °-40 ° according to the described industrial sewing machine needle of claim 1.

3, according to the described industrial sewing machine needle of claim 1, it is characterized in that the side of long wire casing and intersection, bottom surface and side and periphery intersection are circular arc, arc radius R is the 0.05-0.07 millimeter.