DESC:CROSS-REFERENCE TO RELATED APPLICATION
The present application claims priority from the Provisional Application No. 202041023409 filed on 04th June, 2020, the full disclosure of which is hereby incorporated by reference herein.

TITLE OF THE INVENTION
A method for positioning the traveller in front of spindle of a Ring spinning machine.

FIELD OF THE INVENTION
[0001] The present invention relates to the method for positioning the traveller in front of spindle of a Ring spinning machine for threading the yarn into the traveller for piecing operations by a service robot.

BACKGROUND OF THE INVENTION
[0002] When a yarn breaks in a spinning position of a Ring spinning machine, the piecing operation is carried out by an operator who manually position the traveller in front of the spindle and then thread the yarn into the traveller so as to continue the piecing operation for resuming production. This method involves more time and labor cost.
[0003]The present invention overcomes the above drawback wherein the positioning of traveller in front of spindle is done automatically.

OBJECT OF THE INVENTION
[0004] The main object of the present invention is to develop a method for positioning the traveller in front of spindle of a Ring spinning machine automatically.
[0005] Other objects of the invention will be apparent from the description of the invention herein below.

SUMMARY OF THE INVENTION
[0006] Accordingly, the present invention relates to a method for positioning the traveller in front of spindle of a Ring spinning machine for the purpose of piecing the broken yarn by an automatic piecing robot device

[0007] In an aspect of the present invention, the present invention provides a method to position the traveller in front of the spindle of a Ring spinning machine for the purpose of yarn piecing. Usually, yarn piecing is done manually by the Ring frame operator who position the traveller in front of the spindle manually by hand and fingers. They need stop the traveller first and then need to pass the yarn through the traveller and various other components. This consumes more time for yarn piecing. Also, more work force is involved in terms of manual piecing yarn broken yarns. When an automated Robot is used for yarn piecing, the labour work force required is eliminated to a major extent. Hence, in such a case, the invention relates to position the traveller automatically by a method as explained.

BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The present invention is described in the detailed description and not by way of limitation, in the figures of the accompanying drawings, and in which

Figure 1 illustrates the top view of the spindle position of a Ring spinning machine with the elements of claimed invention;
Figure 2 illustrates the position of the different elements of claimed invention;
Figure 3 1 illustrates the cross section view of the spindle position of a Ring spinning machine with the elements of claimed invention;

DETAILED DESCRIPTION OF THE INVENTION
[0009] For the better understanding of the object, technical solution and advantage of the present invention, the present invention will be further explained in detail with respect to embodiments and accompanying drawings below. It should be understood that the specific embodiments described herein only be used for explaining the present invention but not used to limit the present invention.

[0010] The present invention relates to the positioning of traveller in front of a spindle of a Ring spinning machine automatically.

[0011] The method involves a combination of mechanical and pneumatic means which helps to position the traveller in front of the spindle. Pneumatic means involves either blowing or suction or combination of both.

[0012] In particular, when a yarn breaks, the break is sensed by the yarn break detection system which communicates the break information to a service robot. In particular, the yarn break position is communicated to the service robot which automatically moves to the yarn break position and commences its piecing operations.

[0013] For piecing operation, the traveller should be positioned in front of the spindle. For this purpose, two pneumatic elements along with a mechanical stopper are used. In particular, the pneumatic elements are separated away so as to approach the left and right sides of the Ring on which the traveller rotates for winding the yarn to the bobbin. The stopper is positioned between the two pneumatic elements. In case of a yarn break, the traveller since it can rotate freely over the ring due to air dynamics of Ring spinning machine, it could be in any position around the periphery of the ring.

[0014] For traveller positioning, the pneumatic elements along with the mechanical stopper are positioned in front of the spindle. The pneumatic element approaches near the ring in such a way that left side of the pneumatic element approaches the left side of the Ring periphery and the right side of the pneumatic element approaches the right periphery of the ring or vice versa. Single or plurality of air pores is present anywhere on the pneumatic element. While approaching, the air pores at one portion of the pneumatic element blows air alternately and / or continuously in such a way that the traveller wherever it is on the ring periphery reaches the back side of the spindle. When the pneumatic elements reach its extreme inner position, it ensures that the traveller is positioned to the back side of the Ring periphery behind the spindle. At this juncture, the stopper which is in front of the spindle moves forward and approaches the Ring periphery. In particular, the stopper rests over the surface of the Ring or alternately touches the Ring.

[0015] Alternately, the stopper can be at a closer proximity to the Ring. Once the stopper is positioned to this position, one of the pneumatic elements blows the air making the traveller travel over the surface of the Ring periphery and reaches to the front position of the Ring. Since the stopper is at the front position of the Ring, the traveller is stopped by the stopper and positioned exactly to the front position and thus prevented from further movement. An additional blow by another pneumatic element is also done to ensure that traveller gets positioned in front of the spindle by travelling over the Ring periphery on the other side. With this operation, the traveller is positioned exactly in front or nearer to the front of the spindle. In particular, the traveller is positioned in a portion of periphery in front of spindle. Once positioned, further piecing operations is carried out by the service robot.

[0016] Figure 1 explains spindle position of a Ring spinning machine in top view with the elements of claimed invention. Traveller (2) is on the Ring (1). The traveller (2) rotates around the periphery of Ring (1) for winding the yarn to the bobbin (3). The right pneumatic element (4) and left pneumatic element (5) are positioned to the both sides of the Ring (1) and the mechanical stopper (8) is positioned in between the two pneumatic elements (4 and 5). The right and left pneumatic elements (4 and 5) contain single or plurality of pores (6 and 7) through which air is passed. The forward and backward movement of stopper (8) is controlled by a moving element (9) which can be either of spring, electromechanical device, pneumatic or mechanical element.

[0017] Figure 2 explains the position of the different elements of claimed invention wherein the right and left pneumatic elements (4 and 5) are in forward most position so as to push the traveller using air through the single or plurality of pores (6 and 7). The stopper (8) approaches near the Ring (1). The traveller (2) is still in the backward position of the Ring (1).

[0018] Figure 3 explains the cross section view of the spindle position of a Ring spinning machine with the elements of claimed invention wherein the stopper (8) is resting above the Ring (1). The traveller (2) is in backward position. The stopper (8) prevents the further movement of traveller (2) once it comes to the front position. The movement of stopper (8) is controlled by the moving element (9).
,CLAIMS:We Claim:
1. A method for positioning the traveller (2) rotating on the Ring (1) in front of spindle which is carrying the bobbin (3) of a Ring spinning machine wherein, one or more pneumatic elements (4 and 5) and a stopper (8) are used to stop the traveller (2) in front of the spindle,
Characterized in that,
• The one or more pneumatic elements (4 and 5) are separated away from each other so as to approach the left and right sides of the periphery of the Ring (1) on which the traveller (2) rotates, and,
• One or more air pores (6 and 7) are available in the one or more pneumatic elements (4 and 5) for air flow, and,
• Stopper (8) is positioned in front of the spindle carrying the bobbin (3) to stop the traveller (2) in a required position.
2. The method according to claim 1 wherein the air pores (6 and 7) may use suction and / or air blow for positioning the traveller (2)