JPH03243568A - Traverse device - Google Patents

Abstract

PURPOSE:To increase the traverse speed on both ends of a traverse without reducing the curvature radius of turning parts by inclining the turning-back parts of a cam groove on both ends of the traverse in a traverse device to twill a yarn wound on a package. CONSTITUTION:Both ends of a traverse drum 5 are formed in a conical taper shape in which the diameter decreases gradually in the end direction and the turning parts 10 of a cam groove 4 are engraved in the conical tapered parts. A traverse shoe 7 which engages with the cam groove 4 and also makes traverse movement in the axial direction of a package 2 along a guide way 6, has the turning parts 10 of the cam groove 4 formed in inclination. As a result, the curvature radius (r) of the locus of a yarn 8 guided by a yarn guide 9 which is inclined to the outer side in the traverse direction on both ends of the traverse, is made smaller than the curvature radius R of the turning parts of the cam groove 4, and the local traverse speed on both ends of the traverse is increased beyond the traverse speed is determined by the curvature radius R of the turning parts 10 of the cam groove 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a traverse device for traversing yarn wound into a package, and more particularly to a traverse device capable of increasing the traverse speed at both ends of a traverse area. .

[Prior Art] A traverse device shown in FIG. 7 is known as a traversing device for traversing the yarn being wound around the package when the yarn supplied from the yarn feeding side is wound around the package.

As shown in the figure, this traverse device 1 includes a package 2
A cylindrical traverse drum 5 having an endless spiral cam groove 4 carved on its surface and engaged with the cam groove 4 of this drum 5. It also consists of a traverse shoe 7 that is guided by a guideway 6 that is arranged in parallel with the package 2, and a yarn guide 9 that is attached to this shoe 7 and that essentially traverses the yarn 8.

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 thread 8 wound around the package 2 is traversed by a yarn kite 9 attached to the shoe 7.

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 shoe 7 reverses its traverse direction. In order to alleviate this impact, the radius of curvature R of the folded portion 10 is formed to be large,
It is sufficient to gently reverse the shoe 7.

However, if the radius of curvature R of the folded portion 10 is formed to be large, the traverse speed at both ends of the traverse region becomes slow, and the folding time (l residence time) of the yarn at both ends of the package 2 becomes longer. The twill will fall off and the twill will be misaligned. Moreover, the winding density at both ends of the package 2 becomes high, causing a phenomenon in which the edges of the package 2 become high.

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 to solve the problem]

In order to achieve the above object, the present invention provides a traverse drum in which an endless spiral cam groove with folded parts on both sides is carved, and a guideway that engages with the cam groove and is arranged in parallel with the package. A traverse device comprising a traverse shoe that traverses, and a yarn guide attached to the shoe that substantially traverses the yarn,
The folded portion of the cam groove is formed to be inclined so that the traverse shoe is inclined outward in the traverse direction at both ends of the traverse.

[Operation 1] According to the above configuration, the traverse shoe, which traverses in the axial direction of the package along the guideway while engaging the cam groove, is formed so that the folded portion of the cam groove is inclined. Tilts outward in the traverse direction at both ends.

At this time, the yarn kite attached to the traverse shoe is swung outward in the traverse direction from the folded portion of the cam groove.

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.

Mouth example 1 An embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 2 shows a side sectional view of the traverse device 1 according to this embodiment.1 As shown in the figure, this traverse device! 1
has substantially the same configuration as the traverse device 1 shown in FIG.

That is, this traverse device 1 includes a cylindrical traverse cam 5 provided in parallel with a friction roller 3 and in which an endless spiral cam groove 4 having folded portions 10 at both ends is carved, and both ends of this cam 5. A cylindrical cam box 11 that pivotally supports and houses the cam box 11, a guideway 6 having an opening formed in the cam box 11 along the axial direction, and a cam box 11 that is guided by the guideway 6 and that supports the cam box 11. 44, and a yarn guide 9 attached to the traverse shoe 7 and substantially guiding the yarn 8.

The traverse cam 5 in the cambo-y-scum 11 is rotated at a predetermined number of revolutions by a motor (not shown), and as the cam 5 rotates, it is engaged with the cam groove 4. The traverse shoe 7 is guided by the kite way 6, reciprocates and reverses at the folded portion 10 of the cam groove 4, and reciprocates (traverses) in the axial direction of the package 2.

The present invention is characterized in that, as shown in FIG. 1, the folded portion 10 of the cam groove 4 is formed to be inclined so that the traverse shoe 7 is inclined outward in the traverse direction at both ends of the traverse. It is.

Specifically, as shown in FIG. 2, both ends of the traverse drum 5 are formed into a conical taper shape whose diameter gradually decreases toward the ends, and the folded portions 10 of the cam grooves 4 are carved in the conical taper portions. has been done.

As a result, when the traverse shoe 7 is schematically engaged with the cam arm 4 and moved along the cam groove 4, as shown in FIG. As shown in FIG. 4, the cam groove 4 is not inclined, and the traverse shoe 7 and the yarn guide 9 attached to the shoe 7 are in an upright state, and when the cam groove 4 starts to engage the conical taper part, the fifth As shown in the figure, the cam groove 4 begins to incline, and at the folded part 10 of the cam groove 4, the inclination angle θ of the cam groove 4 reaches its maximum, and the shoe 7
And the yarn kite 9 will tilt outward in the traverse direction.

Therefore, as shown by the two-dot chain line 12 in FIG.
The radius of curvature is smaller than the radius of curvature R of .

The operation of this embodiment having the above configuration will be described.

As shown in FIG. 2, the traverse shoe 7 that engages with the cam groove 4 and moves traversely in the axial direction of the package 2 along the guideway 6 is connected to the folded portion 10 of the cam groove 4.
Since it is formed so as to be inclined, it is inclined outward in the traverse direction at both ends of the traverse, as shown in FIG.

At this time, the yarn guide 9 attached to the traverse shoe 7 is swung outward from the folded portion 10 in the traverse direction. Therefore, as shown in FIG. 3, the radius of curvature r of the trajectory of the yarn 8 guided by this yarn guide 9
is smaller than the radius of curvature R of the folded portion of the cam groove 4,
The local traverse speed at both ends of the traverse is increased to be higher than the traverse speed determined by the radius of curvature R of the folded portion 10 of the cam groove 4.

That is, without reducing the radius of curvature R 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.

In this way, by locally increasing the traverse speed at both ends of the traverse, the turn-back time (residence time) of the yarn at both ends of the package 2 is shortened, reducing twill drop and twill misalignment at both ends of the package 2. be done. Moreover, the phenomenon of height of the edges of the package 2, which occurs when the winding density at both ends of the package 2 becomes high, is also suppressed.

According to the inventor's experiments, the radius of curvature R of the folded portion 10 of the cam groove 4 shown in FIG.
When the inclination angle θ of the folded portion 10 of the cam groove 4 shown in the figure is θ=15 degrees, the radius of curvature r of the locus of the yarn 8 guided by the yarn guide 9 shown by the two-dot chain line in FIG. 20111
It has been confirmed that it can be as small as 1.

In this case, since the radius of curvature r of the trajectory of the thread 8 is reduced to approximately half the radius of curvature R of the folded portion 10 of the cam groove 4, the traverse speed at both ends of the traverse is locally increased accordingly. .

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 of the cam 4-turning portion 10 will increase by that amount R = 40
In can be increased to R=60ni, 70+ui, and the overall traverse speed can be increased. As a result, since the overall traverse speed increases, the winding speed of the package 2 can be increased, and the winding of the package 2 can be promoted at high speed.

Note that if the distance Mi between the traverse shoe 7 that engages with the cam groove 4 shown in FIG. 4 and the yarn guide 9 that is attached to this shoe 7 and guides the yarn 8 is increased, the distance Mi shown in FIG. It is also possible to further reduce the radius of curvature r of the trajectory of the thread 8 shown in FIG. In this case, the traverse speed at both ends of the traverse will further increase.

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

Middle: Without reducing the radius of curvature of the folded part of the cam arm,
The traverse speed at both ends of the traverse can be increased.

L21 Therefore, it is possible to suppress twill drop, twill misalignment, and the height of the package at both ends of the package.

[Brief explanation of drawings]

Fig. 1 is a partial side sectional view of a traverse device showing an embodiment of the present invention, Fig. 2 is a side sectional view of the traverse device shown in Fig. 1, and Fig. 3 schematically shows how a traverse shoe is connected to a cam groove. A schematic diagram showing how they are combined, Figure 4 is IV of Figure 3.
5 is a sectional view taken along the line V--IV in FIG. 3, FIG. 6 is a sectional view taken along the line IV--IV in FIG. 3, and FIG. 7 is a perspective view of the entire traverse device. In the figure, ■ is a traverse device, 2 is a package, 4 is a cam groove, 5 is a traverse drum, 6 is a guideway, 7 is a traverse shoe, 8 is a thread, 9 is a yarn guide, and 10 is a folded portion. guide r4

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 a traverse device equipped with a yarn guide that is attached to a shoe and that substantially traverses the yarn, the folded portion of the cam groove is formed to be inclined so that the traverse shoe is inclined outward in the traverse direction at both ends of the traverse. A traverse device characterized by: