JPH03249064A - Traverse device - Google Patents

Abstract

PURPOSE:To increase the traverse speed at both end parts of a traverse without reducing the radius of curvature at a cam groove turning back part by forming a guide groove at the cam groove turning back part for inclining a yarn guide outward in the traverse direction. CONSTITUTION:A yarn guide 9 is connected to a traverse shoe 7 through a plate spring 11 to be freely inclined. An endless spiral cam groove 4 engraved in a traverse drum 5 is a double groove consisting of a lower cam groove 4a engaged with the shoe 7, and an upper cam groove 4b engaged with a yarn guide 9. The cam groove 4b is formed eccentrically to left in relation to the cam groove 4a on a left side turning back part 10a of the cam groove 4, while it is formed reversely on a right side turning back part 10b. The quantity of eccentricity is set to be the maximum at the turning back parts 10a, 10b. The yarn guide 9 is thus inclined outward as it gets closer to the turning back part, so the radius of curvature of yarn 8 becomes small without reducing the radius of curvature of the groove 4 at the turning back part, thereby the traverse speed at the turning back part can be increased.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a traverse device for traversing a yarn wound into a package, and particularly to a traverse device that can increase the traverse speed at both ends of a traverse area. .

[Prior Art] A traverse device shown in FIG. 5 is known as a traverse device for swinging the yarn wound around the package when the yarn supplied from the yarn supply side is wound around the package.

As shown in the figure, this traverse device f1 is provided in parallel with a friction roller 3 that contacts and rotates the package 2, and includes a cylindrical traverse drum 5 with an endless spiral cam groove 4 carved on its surface. , a traverse shoe 7 that engages with the cam groove 4 of this drum 5 and is guided by a guideway 6 arranged in parallel with the package 2, and a yarn guide 9 that is attached to this shoe 7 and that substantially traverses the yarn 8.
It is composed of.

The traverse device 1 moves the traverse shoe 7, which is engaged with the cam groove 4 of the drum 5, in the axial direction of the package 2 along the guideway 6 by rotating the traverse drum 5 by a motor (not shown). The yarn 8 wound around the package 2 is traversed by a yarn guide 9 attached to the shoe 7.

[Problem N11 to be solved by the invention] By the way, in such a traverse device 1, the folded portions 10 on both sides of the cam groove 4, which are both ends of the traverse area,
(also referred to as the nose portion), an impact occurs when the traverse direction of the shoe 7 is reversed. This impact causes wear of the nylon shoe 7 or causes the shoe 7 to derail from the cam groove 4. In order to alleviate this impact, the radius of curvature R of the folded portion 10 may be made large and the shoe 7 may be gently reversed.

However, if the radius of curvature R of the turn-back section 10 is made large, the traverse speed at both ends of the traverse area becomes slow, and the turn-back time (residence time) of the yarn at both ends of the baggage 2 becomes longer. This causes twill drop and twill misalignment.Furthermore, the density of the winding yarn at both ends of the baggage 2 becomes high, causing the package 2 to have a high selvage phenomenon.

Therefore, the radius of curvature R of the folded portion 10 of the cam groove 4 cannot be increased blindly.

An object of the present invention, which was created in consideration of the above circumstances, is to provide a traverse device that can increase the traverse speed at the folded portion of a cam groove without increasing the radius of curvature of the folded portion.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a traverse drum in which an endless spiral cam groove with folded portions on both sides is carved, and a traverse drum that engages with the cam groove and is attached to a package. A traverse device comprising a traverse shoe that traverses along guideways arranged in parallel, and a yarn guide that is attached to the shoe and that substantially traverses the yarn,
The yarn guide is tiltably connected to the traverse shoe, and a guide groove for tilting the yarn guide outward in the traverse direction is formed in the folded portion of the cam groove.

[Operation J] According to the above configuration, the traverse shoe that engages with the cam groove of the traverse drum moves traversely in the axial direction of the package along the guideway as the drum rotates. At this time, the yarn guide, which is tiltably connected to the traverse shoe, is inclined outward in the traverse direction at both ends of the traverse by the guide grooves formed in the folded portions of the cam grooves.

That is, the yarn guide is swung outward in the traverse direction from the folded portion of the cam groove with which the shoe engages.

Therefore, the traverse speed of the yarn guided by this yarn guide becomes faster than the traverse speed determined by the radius of curvature of the folded portion of the cam groove at both ends of the traverse.

[Example code] An example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows an enlarged cross-sectional view of essential parts of a traverse device 1 according to the present embodiment. A lower cam groove 4a in which the traverse shoe 7 engages an endless spiral cam groove 4 carved in the traverse drum 5, and an upper part in which the yarn guide 9 engages. It is formed in a two-step groove shape consisting of a cam groove 4b.

The two-stage cam groove 4 consisting of the upper cam groove 4b and the lower cam groove 4a is carved in an endless spiral on the surface of the traverse drum 5, as shown in FIG.

In particular, in the left folded portion 10a of the cam groove 4, the third
As shown in FIG. 3(a), the upper cam groove 4b is formed eccentrically to the left with respect to the lower cam groove 4a, and in the right folded portion 10b, the upper cam groove 4b is formed in the lower portion as shown in FIG. 3(c). It is formed eccentrically to the right with respect to the cam groove 4a.

Further, in the cam grooves 4 other than the left and right folded portions 10a and 10b, the upper cam groove 4b is formed without eccentricity in the center of the lower cam groove 4a, as shown in FIG. 3(b).

More specifically, in the vicinity of the left folded portion 10a, as shown in FIG. 4(a), the upper cam groove 4b
The closer you get to the left folded part 10a, the more the left IFII core amount with respect to the lower cam groove 4a increases.
0a, the amount of eccentricity is maximum as shown in FIG. As shown in b), it is formed so that the amount of eccentricity is zero.

Similarly, regarding the right side folded portion 10b, as shown in FIG. It is formed to do so.

Therefore, such upper cam groove 4b and lower cam groove 4a
When the yarn guide 9 and the traverse shoe 7 are respectively engaged with the cam groove 4 as shown in FIG. 1 and run schematically along the cam groove 4, as shown in FIG. 4(b) and FIG. At the right folded portion tab shown in (C), the yarn guide 9 is tilted outward to the right in the traverse direction via the leaf spring 11 as shown by the dashed line in FIG. 1 by the upper cam groove 4b eccentric to the right. Become. Also, Fig. 4(a)
Similarly, in the left folded portion 10b shown in FIG. 3(a), the yarn guide 9 is tilted outward to the left in the traverse direction due to the leftward eccentricity of the upper cam groove 10b.

That is, the upper cam groove 4b constitutes a guide groove for inclining the yarn guide 9 outward in the traverse direction at the left and right folded portions 10a and 10b.

Further, the upper cam 14b constituting the guide groove has left and right folded portions 10a, as shown in FIG.

10b, the groove depth 12 thereof is formed deeper than the engagement depth 13 of the yarn guide 9 in order to allow the yarn guide 9 to incline.

The operation of this embodiment having the above configuration will be described. The yarn guide 9 and the traverse shoe 7, which engage with the upper cam groove 4b and lower cam groove 4a of the traverse drum 5 shown in FIG. 1, respectively, move along the guideway 6 shown in FIG. 5 as the drum 5 rotates. The package 2 is traversed in the axial direction.

At this time, the guide 9, which is tiltably connected to the traverse shoe 9 via a leaf spring 11, is connected to the guide groove 10 in the folded portion 10 of the cam groove 4 by a guide groove consisting of an eccentric upper cam groove 4b, as shown in FIG. It slopes outward in the traverse direction as shown by the dashed line.

At this time, the yarn guide 9 is swung outward in the traverse direction from the folded portion 10 of the lower cam groove 4a with which the traverse shoe 7 engages.

Therefore, as shown by the dashed line 14 in FIG. 4, the radius of curvature r of the locus of the yarn 8 guided by the yarn guide 9 is smaller than the radii of curvature R1 and R2 of the upper and lower cam grooves 4a and 4b. , the local traverse speed at both ends of the traverse is determined by the radius of curvature R1 of the cam groove folded portion 10a,
This will increase above the traverse speed determined by R2.

That is, the radii of curvature R1, R2 of the folded portion 10 of the cam groove 4
Since the yarn guide 9 is swung outward in the traverse direction, the traverse speed at both ends of the traverse can be locally increased without reducing the traverse speed.

In this way, by locally increasing the traverse speed at both ends of the traverse, the package 2 shown in FIG.
The turn-back time (residence time) of the yarn at both ends is shortened, and twill drop and twill misalignment at both ends of the para gauge 2 are reduced.

Furthermore, the phenomenon of height of the edges of the package 2 caused by an increase in the winding density at both ends of the baggage 2 is also suppressed.

Paradoxically speaking, if the traverse speed at both ends of the traverse is maintained at the same speed as before without locally increasing it, the radius of curvature R,, R2 of the cam width 4 turn-back portion 10 will increase by that amount.
can be increased, making it possible to increase the overall traverse speed.

As a result, since the overall traverse speed increases, the winding speed of the package 2 can be increased, and the package 2
High-speed winding can be promoted.

In addition, if the distance M between the traverse lane knee 7 that engages with the cam groove 4 shown in FIG. The radius of curvature r of the locus of the thread 8 indicated by the dashed line 14 in FIG.
It is also possible to make it even smaller. In this case, the traverse speed at both ends of the traverse will further increase.

2. Effects of the Invention As explained above, according to the present invention, the following excellent effects can be exhibited.

(1) The traverse speed at both ends of the traverse can be increased without reducing the radius of curvature of the cam groove folded portion.

(2) Therefore, the 1M twill drop at both ends of the package and the height of the package can be suppressed.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional view of essential parts of a traverse device showing an embodiment of the present invention, FIG. 2 is a schematic diagram showing a traverse drum of the traverse device, and FIG. A sectional view showing the left side folded part of the cam groove,
FIG. 3(c) is a sectional view showing the right side folded part of the cam groove, FIG. 3(b) is a sectional view showing the cam groove outside the left and right folding parts, and FIG. 4(a) is a sectional view of the cam groove. FIG. 4(b) is an enlarged top view showing the left side folded part of the cam groove, FIG. 5 is an enlarged top view showing the right side folded part of the cam groove, and FIG. 5 is a perspective view of the entire traverse device. In the figure, 1 is a traverse device, 2 is a package, 4 is a cam groove, 4a is a lower cam groove, 4b is an upper cam groove which is a guide groove, 5 is a traverse drum, 6 is a guideway, 7 is a traverse shoe, and 8 is a cam groove. 9 is a yarn guide, 10 is a folded part of the cam groove, 10a is a left folded part, and 10b is a right folded part.

Claims (1)

[Claims] 1. A traverse drum in which an endless spiral cam groove with folded parts on both sides is carved; a traverse shoe that engages with the cam groove and moves traversely along a guideway arranged in parallel with the package; In the traverse device, the yarn guide is attached to the shoe and includes a yarn guide that substantially traverses the yarn, the yarn guide is tiltably connected to the traverse shoe, and the yarn guide is attached to the folded portion of the cam groove outward in the traverse direction. A traverse device characterized in that a guide groove is formed for tilting the traverse device.