JPH0711183Y2 - Snell guide - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a snell guide mainly used for textile machines such as spinning machines, twisting machines and covering machines.

[0002]

2. Description of the Related Art Among various yarn guides, as a snell guide used for the purpose of positioning the ballooning starting point where the yarn ballooning starts and the winding point of the sheath yarn around the core yarn in the covering process Generally, as shown in FIG. 10, a wire material having a circular cross section, such as metal, glass, or ceramic, is wound left or right so that the thread can be easily inserted into the hole and the thread does not easily deviate from the thread guide hole. It is formed by winding, and a snell guide g having a spiral yarn guide portion d, which partially overlaps with a gap for threading, is often used.

[0003]

In the Snell guide g formed by winding a material having a circular cross section, it is difficult to bend the thread guide hole h to be smaller than the outer diameter of the material because of the physical properties of the material. Further, particularly in the case of the Snell guide g made of ceramic, it is necessary to make the outer diameter thicker than a certain limit to maintain the strength, so that there is a problem that the contact area between the yarn and the yarn guiding portion d becomes excessively large.

Further, when the ballooning starting point where the ballooning starts is defined by the snell guide g, the yarn guiding portion d
Since the contact area and the contact resistance with the yarn are different between the double part d1 and the single part d2, there is a problem that uneven drawing occurs in the textured yarn in the draw false twisting machine, for example.

Further, as shown in FIG. 12, the sheath yarn y2 is run through the hollow spindle s while unwinding the sheath yarn y2 wound around a bobbin b fitted and fixed on a rotating hollow spindle s. In the covering process of manufacturing the covering yarn by winding it around the core yarn y1, the winding point p of the sheath yarn y2 around the core yarn y1 is defined by the position where the sheath yarn y2 contacts the snell guide g, and the position of this winding point p The sheath yarn y2 is spirally wound around the core yarn y1 at a predetermined angle. However, the larger the diameter of the yarn guiding hole h, the closer the contact point between the sheath yarn y2 and the snell guide g is to the core yarn y.
Since it is separated from 1, the position of the winding point p is easily changed, and the contact point a1 where the sheath yarn y2 contacts the double portion d1 of the yarn guide portion d and the sheath yarn y2 at the single portion d2 of the yarn guide portion d. Since a height difference and a distance difference from the core yarn y1 occur with the contact point a2 in contact with each other, the winding point p is vertically displaced for each rotation of the sheath yarn y2, and the winding angle of the sheath yarn y2 is b1 and b2 as shown in FIG. Change to b2.

With a snell guide g having a triangular cross section as shown in FIG. 13, the diameter of the yarn guiding hole h can be made shorter than that of the snell guide g having a circular cross section, but the sheath yarn y2 has a lower surface of the double portion d1. Since the height of the contact point a1 contacting with the contact point a2 and the contact point a2 contacting with the tip of the single portion d2 are different from each other and the distance from the core yarn y1, the winding point p still fluctuates.

In particular, fine denier polyurethane fiber is used as the core yarn y1, nylon filament or silk yarn is used as the sheath yarn y2, and one or two layers of sheath yarn y2 are wound around the core yarn y1 to form a fine count panty. When the stocking base yarn is covered, when the stretched core yarn y1 is released, as shown in FIG. 11, the winding angle of the sheath yarn y2 with respect to the core yarn y1 is b1 due to the variation of the position of the winding point p. There is a problem that the quality of the raw yarn for pantyhose and the quality of the product knitted with the raw yarn for pantyhose are deteriorated due to the change to b2 or the unevenness of expansion and contraction of the core yarn y1.

Therefore, in order to improve the positioning function of the snell guide with respect to the yarn, the hole diameter of the yarn guide hole should be made as small as possible and the loci of the contact points between the yarn guide hole and the yarn should be kept at the same level. It is desirable to use a loop guide having a thread guiding portion with a small hole at the center of the disk, but this loop guide has a disadvantage that the thread hooking operation becomes complicated. An object of the present invention is to provide a snell guide capable of improving the positioning function for the yarn and simplifying the yarn hooking operation.

[0009]

The snell guide of the present invention has a lower overlapping portion at the center of a yarn guiding portion having a lower overlapping portion and an upper overlapping portion which are overlapped with each other with a threadable gap therebetween. A base end edge of the lower threading groove cut into a slit shape from the peripheral edge of the yarn guide portion to the central portion,
A yarn guide hole formed by overlapping the base end edge of the upper threading groove cut in a slit shape from the peripheral edge of the yarn guide section to the center of the upper overlapping section has a yarn contact surface with an acute angle. It has a configuration in which it is disposed at the apex of the cross section and penetrates so as to be formed at substantially the same level around the central portion.

[0010]

[Function] A yarn guide hole is formed by overlapping both base end edges of the lower thread passing groove and the upper thread passing groove, which are slit-shaped cuts in the lower overlapping portion and the upper overlapping portion of the yarn guiding portion, respectively. Also, the yarn contacting surface of the yarn introducing hole is formed at substantially the same level in the horizontal direction at the apex position of the acute angle section to suppress the vertical fluctuation of the contact point between the yarn and the yarn contacting surface, and reduce the circling range of the contact point. . Further, the gap formed between the both overlapping portions and the both threading grooves enable threading into the yarn introducing hole.

[0011]

Since the present invention is configured as described above, it is possible to simplify the yarn hooking operation to the yarn guide hole and prevent the yarn from coming off the yarn guide hole. In addition, the contact area between the yarn and the yarn contact surface can be reduced to reduce the contact resistance when the yarn slides on the yarn contact surface, and the position where the yarn contacts the yarn contact surface can be reduced over the entire circumference. Can be kept at about the same level. Furthermore, since the yarn guide holes are formed by superimposing the base end edges of both the yarn threading grooves, the hole diameter of the yarn guide holes can be arbitrarily set according to the thickness of the yarn, and the yarn is It is possible to reduce the circumscribing range of the contact that is in contact with the yarn contact surface as much as possible. Therefore, when this snell guide is used for positioning the winding point in covering, for example, the distance between the contact point where the sheath thread contacts the thread contact surface and the core thread is shortened and this contact point is maintained at substantially the same level over the entire circumference. Therefore, it is possible to reduce the fluctuation of the winding point and improve and stabilize the quality of the covering textured yarn.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The snell guide G used in textile machines such as spinning machines, twisting machines, and covering machines is made of a ceramic material, and the snell guide G is a round rod-shaped mounting shaft that is horizontally inserted into a connecting member of the textile machine. 1a and a substantially disc-shaped lower guide piece 1b continuously provided at the tip of the mounting shaft 1a
And a lower guide piece 1b at the tip of the snell guide G, and the lower guide piece 1 is formed.
The yarn guide portion 2 is formed by a substantially disc-shaped upper guide piece 3 that is integrally laminated on b.

A guide groove 6 curved in an arc is formed between the upper guide piece 3 and the tip edge 23 of the mounting shaft 1a.

In the vicinity of the central portion of the lower surface of the lower guide piece 1b, a concave curved surface 4 having a concave conical surface which is inclined upward toward the center line A of the yarn guiding portion 2 is formed, and on the upper surface of the lower guide piece 1b. 2 on the top
An upper step surface 5a and a lower step surface 5b, which are connected to each other through a dividing step 5c, are each formed in a horizontal plane shape. On the upper step surface 5a of the lower guide piece 1b, there are two round holes 7,7
And a long hole 8 curved in an arc shape are recessed for positioning and fixing the upper guide piece 3.

In the vicinity of the central portion of the upper surface of the upper guide piece 3, a concave curved surface 9 having a concave conical surface which is inclined downward toward the center of the yarn guiding portion 2 is formed symmetrically with the concave curved surface 4, and the upper guide piece 3 is formed. The lower surface of the lower guide piece 1b, which is connected to the lower surface of the lower guide piece 1b through a step 10c that bisects the lower surface of the lower guide piece 1b and the lower step surface 5b of the lower guide piece 1b, is arranged in parallel. The upper surface 10b is formed. Lower step surface 10 of upper guide piece 3
Two small projections 13 and 13 that can be tightly fitted in the small holes 7 of the lower guide piece 1b and a convex portion 14 that can be tightly fitted in the long hole 8 are provided on the a.

The yarn guide portion 2 has an upper step surface 5a of the lower guide piece 1b.
And the lower step surface 10a of the upper guide piece 3 are in close contact with each other, and both the small projections 13 and the convex portions 14 of the upper guide piece 3 are in contact with each other.
The guide pieces 1b and 3 are integrally joined together in a state where they are tightly fitted in the small holes 7 and the long holes 8 and are joined with an adhesive.

On one side of the yarn guiding portion 2, a threadable gap 15 formed horizontally between the lower step surface 5b of the lower guide piece 1b and the upper step surface 10b of the upper guide piece 3 is superposed. A lower overlapping portion 16 and an upper overlapping portion 17 are formed, and further, both overlapping portions 1 are provided on the other side of the yarn guiding portion 2.
6 and 17 are provided adjacent to each other on both sides and overlapped with each other 16, 17
To each other, a connecting portion 18 is formed.

The connecting portion 1 of the lower overlapping portion 16 of the yarn guiding portion 2
A lower thread passing groove 19 is formed in a slit shape from the peripheral edge of the yarn guiding portion 2 to the vicinity of the center line A along the radial direction of the lower guide piece 1b at the end on the 8 side. A base end edge 19a of 19 is curved in a semicircular shape centering on the center line A of the yarn guide portion 2.

The connecting portion 1 of the upper overlapping portion 17 of the yarn guiding portion 2
An upper threading groove 20 that is cut in a slit shape from the peripheral edge of the yarn guiding portion 2 to the vicinity of the center line A and is extended in series to the opposite side of the lower threading groove 19 is formed at the end on the 8th side, A base end edge 20a of the upper threading groove 20 is curved in a semicircular shape around the center line A of the yarn guiding portion 2.

Both base end edges 19a of the two threading grooves 19 and 20,
20a is formed such that its ridge line overlaps around the center line A of the yarn guide portion 2 and is continuous in a circular shape in a plan view. In the center portion of the yarn guide portion 2, both bases of both threading grooves 19 and 20 are formed. Edge 19
A yarn guide hole 21 formed by superimposing a and 20a is formed in a circular shape.

The vertical cross-sectional shape near the central portion of the yarn guiding portion 2 is formed in an acute V shape having an apex on the side of the center line A, and is arranged in the yarn introducing hole 21 at the apex of the acute angle cross section. The yarn contact surface 22 is formed circumferentially around the center line A at substantially the same level.

During the thread hooking operation of the thread guide hole 21, while gripping a part of the thread and inserting the subsequent portion of the grip from the outer end of the bobbin threading groove 19 into the gap 15 through the guide groove 6. , The gripping portion is circulated about a half along the outer peripheral edge of the upper overlapping portion 17, and the succeeding portion is inserted into the upper threading groove 20 and is advanced to the base end in the upper threading groove 20. Thread guide hole 2
1 can be inserted.

The lower guide piece 1b and the upper guide piece 3 may be integrally formed to form the yarn guide portion 2. Further, the lower guide piece 1b and the upper guide piece 3 may be joined by means such as screwing or caulking to form the yarn guide portion 2.
Further, when an extending portion extending in the extension direction of the upper threading groove 20 is formed to project at the end portion of the upper overlapping portion 17 on the upper threading groove 20 side, the effect of preventing the thread from coming off from the yarn guiding hole 21 can be obtained. Can be increased.

Next, the operation and effect of the embodiment having the above configuration will be described. In the present embodiment, the lower superimposing portion 16 has a lower superimposing portion 16 and an upper superimposing portion 17 which are superposed with a gap 15 through which the thread can be threaded. The base end edge 19a of the lower threading groove 19 cut in a slit shape over the central portion and the upper threading groove 20 cut in a slit shape in the upper overlapping portion 17 from the peripheral edge of the yarn guiding portion 2 to the central portion. Base edge 2
0a is formed so as to be overlapped with each other so that the yarn contact surface 22 is disposed at the position of the apex of the acute-angled cross section and is formed around the center line A at substantially the same level. is there.

Therefore, the yarn hooking operation to the yarn guide hole 21 can be simplified to prevent the yarn from coming off the yarn guide hole 21.

The contact area between the yarn and the yarn contact surface 22 can be reduced to reduce the contact resistance when the yarn slides on the yarn contact surface 22, and the yarn can contact the yarn contact surface 22. The contact position can be maintained at substantially the same level over the entire circumference.

Further, the base end edge 1 of both threading grooves 19, 20
Since the yarn guide hole 21 is formed by superimposing 9a and 20a, the hole diameter of the yarn guide hole 21 can be arbitrarily set according to the thickness of the yarn, and the yarn comes into contact with the yarn contact surface 22. The circulating range of the contact can be reduced as much as possible.

Therefore, when this snell guide G is used for positioning the winding point in the covering process, the gap between the contact point a where the sheath yarn y2 contacts the yarn contact surface 22 and the core yarn y1 is shortened as shown in FIG. Since this contact can be maintained at substantially the same level over the entire circumference, it is possible to reduce the fluctuation of the winding point P and improve and stabilize the quality of the covering textured yarn.

[Brief description of drawings]

FIG. 1 is a plan view of a snell guide showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line X1-X1 of FIG.

FIG. 3 is a sectional view taken along line X2-X2 of FIG.

FIG. 4 is an exploded perspective view of a snell guide.

FIG. 5 is a plan view of a main body section.

6 is a sectional view taken along line X3-X3 of FIG.

FIG. 7 is a rear view of the upper guide piece.

8 is a sectional view taken along line X4-X4 of FIG.

FIG. 9 is an explanatory diagram showing a state when manufacturing a covered textured yarn using a snell guide.

FIG. 10 is a plan view of a conventional Snell guide.

FIG. 11 is a side view showing an enlarged part of the covering textured yarn.

FIG. 12 is an explanatory view showing a state in which a covering processed yarn is manufactured using a conventional Snell guide.

FIG. 13 is an explanatory view showing a state when manufacturing a covering processed yarn by using a conventional Snell guide.

[Explanation of symbols]

 2 Thread guide part 15 Gap 16 Lower overlap part 17 Upper overlap part 19 Lower thread thread groove 20 Upper thread thread groove 21 Thread hole 22 Thread contact surface A Center line G Snell guide

Claims (1)

[Scope of utility model registration request] 1. A central portion of a yarn guiding portion having a lower overlapping portion and an upper overlapping portion that are overlapped with each other with a threadable gap therebetween, and a central portion from a peripheral edge of the yarn guiding portion to the lower overlapping portion. A base end edge of the lower threading groove cut in a slit shape over, and a base end edge of the upper threading groove cut in a slit shape from the peripheral edge of the yarn guiding section to the central portion in the upper overlapping portion. Is formed so that the yarn contacting surface is disposed at the position of the apex of the acute-angled cross section and is formed at substantially the same level around the central portion. Snell guide.