DESC:
Field of Invention
The present invention relates to an arrangement and method for resetting the roving stop motion mechanism of a Ring frame by means of a service robot to enable it to proceed for piecing operation.

Background of Invention
Whenever a yarn breaks in a Ring frame, piecing of the broken yarn is carried out by means of the operator. In case of Ring frames equipped with Individual Spindle Monitoring systems, the yarn break is identified by means of a light indication. Additionally, Ring frames may be equipped with Roving Stop Motion mechanism in every spindle position. This mechanism is usually stops the Roving and prevents into the drafting system of the Ring frame to avoid material waste. The Roving Stop Motion is usually connected with the relevant Individual Spindle Monitoring Sensor. When a yarn breaks, the Individual Spindle Monitoring Sensor detects the yarn break and sends the signal to the Roving Stop Motion. The Roving Stop Motion activates and stops the supply of Roving to the specific spindle position.

Recently, robotic piecing methods are employed to piece the broken yarn. In case of Ring frames equipped with Individual Spindle Monitoring Sensors with Roving Stop Motion mechanisms, it is necessary for the service robot to reset the Roving Stop Motion to enable the material flow. The service robot while attending the broken yarn for piecing should reset the Roving Stop Motion first thereby the supply of Roving to the drafting system is resumed. Later on, the service robot proceeds for the piecing operation.

Reference is made to US4763467A which explains about the method of controlling the stop of the feed of roving in a spinning machine in which yarn is wound on spindles through travelers rotating on rings and in which a stop motion is actuated to stop the feed of the roving to drafting rolls in response to detecting a yarn break and is subsequently deactuated to permit roving feed during a yarn break repair operation. The deactivation is done when yarn break repair is done. In this invention, the deactivation is done only when the yarn break repair is done. Also, the method of deactivation is not described clearly.

US4951357A explains about the stop motion apparatus for a drafting device for roving in a textile machine includes a stop member into roving stopping engagement with the intake feed rollers of the drafting device by operation of an actuating rod. The actuating rod includes a notch having an undercut surface for engagement by a plunger element. Preferably, the undercut surface is transversely arcuate and the plunger element includes a plastic sleeve element compatibly configured with the actuating rod notch. The plunger element is selectively insertable into, and retractable from, the notch of the operating rod by an electromagentic assembly operatively connected to a yarn break monitor. In this invention also, the method of the plunger element is insertable into and retracted from the notch is not defined.

The present invention provides an easy method to reset the Roving Stop Motion and resume the supply of roving so as to proceed the piecing operation.

Summary of Invention
The present invention relates to a method for resetting the roving stop motion mechanism of a Ring frame by means of a service robot.

In particular, the Roving Stop Motion mechanism of the Ring frame is attached with an actuating assembly. The actuating assembly consists of a rotatable rod which is mounted on a fulcrum point. One end of the rotatable rod contains a finger lever. A pushing lever is also mounted in the central portion of the rotatable rod. The pushing lever is positioned in such a way that it pushes the middle portion of horizontal lever. When the service robot reaches the break spindle position, an actuating lever of the service robot pushes the finger lever of the Roving Stop Motion actuating assembly. This makes the rotatable rod to rotate in its mounted axis thereby making the pushing lever to move forward. The pushing lever pushes the middle portion of the horizontal lever which makes the coupling of Roving Stop Motion to release the stopped roving material thereby allowing the roving supply into the drafting system of Ring frame. Later on, the service robot proceeds for the piecing activity.

Brief Description of the Accompanying Drawings
Fig 1 illustrates an isometric view of a Roving stop motion arrangement as described in one of the embodiment of present invention.

Fig. 2 illustrates the cross section view of the Roving stop motion arrangement as described in one of the embodiment of present invention.

Fig. 3 illustrates the cross section view of the Roving stop motion arrangement as described in one of the embodiment of present invention.

Detailed Description of the Invention
The present invention relates to a Roving stop motion arrangement comprising a roving stop motion actuating assembly operably connected with a service robot;
wherein said actuating assembly comprises a rotatable rod, mounted on a fulcrum point, containing a finger lever at its one end; a pushing lever mounted in the central portion of the rotatable rod; a horizontal lever pushably positioned near the said pushing lever; a coupling fixed at end of said horizontal lever;
wherein said service robot comprises an actuating lever configured to push/ pull said finger lever of said actuating assembly so that the pushing lever pushes the horizontal lever thereby the stopped Roving material is released by the coupling.

In an embodiment of present invention, the operation of the finger lever makes it to rotate in its fulcrum point thereby making the pushing lever to rotate in its fulcrum point.

In another embodiment, the rotation of the pushing lever pushes the horizontal lever of the roving stop motion.

In a further embodiment, the pushing of horizontal lever makes the coupling to release the stopped roving material.

The present invention further relates to a method for resetting the roving stop motion mechanism of a Ring frame by means of a service robot, comprising:
pushing or pulling a finger lever, positioned at one end of a rotatable rod of an actuating assembly and mounted on a fulcrum point, by an actuating lever of a service robot thereby rotating said pushing lever in its fulcrum point by rotation of said rotatable rod;
pushing a horizontal lever pushably attached with said pushing lever by the rotation of said pushing lever;
releasing a stopped roving material by a coupling positioned at the end of said horizontal lever.

According to one of the exemplary embodiment, Fig 1 shows a Roving stop motion (1) comprises of an actuating assembly (2). The actuating assembly (2) comprises of a rotatable rod (3) mounted on a fulcrum point (4). One end of the rotatable rod (3) contains a finger lever (5). A pushing lever (6) is also mounted in the central portion of the rotatable rod (3). The pushing lever (6) is positioned in such a way that it pushes the central portion of the horizontal lever (7) of Roving stop motion (1). The coupling (10) is fixed at end of the horizontal lever (7). The service robot (8) comprises of an actuating lever (9) which pushes the finger lever (5) so that the pushing lever (6) pushes the horizontal lever (7) thereby the stopped Roving material is released by the coupling (10).

Fig 2 shows the cross section view of the invention with the finger lever (5) mounted on the rotating rod (3, not shown) which is mounted on the fulcrum point (4). The other end of the rotating rod (3) is mounted with a pushing lever (6) and the pushing lever (6) is positioned in such a way that it pushes the horizontal lever (7). The coupling (10) is mounted at the end of the horizontal lever (7). The service robot (8) consists of an actuating lever (9) which is positioned near the finger lever (5).

In an alternate embodiment, the pushing operation can be replaced by a pulling operation wherein the actuating lever (9) can pull the finger lever (5) from the back side thus achieving the pushing operation for the pushing lever (6).

Fig 3 shows the cross section view of the invention with the actuating lever (9) of the service robot (8) activates the finger lever (5) thereby the finger lever (5) rotates in its fulcrum point (4) which in turn makes the pushing lever (6) to rotate in its fulcrum point (4). When the pushing lever (6) rotates, it pushes the horizontal lever (7) thus the coupling (10) releases the stopped roving material and thereby allowing the roving supply into the drafting system of the Ring frame to resume the production operation.
,CLAIMS:1. A Roving stop motion arrangement comprising a roving stop motion actuating assembly (2) operably connected with a service robot (8);
wherein said actuating assembly (2) comprises a rotatable rod (3), containing a finger lever (5) at its one end; a pushing lever (6) mounted with the rotatable rod (3); a horizontal lever (7) pushably positioned near the said pushing lever (6); a coupling 10) fixed at end of said horizontal lever (7);
wherein said service robot (8) comprises an actuating lever (9) configured to push/ pull said finger lever (5) of said actuating assembly (2) so that the pushing lever (5) pushes the horizontal lever (7) thereby the stopped Roving material is released by the coupling (10).

2. The arrangement as claimed in claim 1, wherein the operation of the finger lever (5) makes it to rotate in its fulcrum point (4) thereby making the pushing lever (6) to rotate in its fulcrum point (4).

3. The arrangement as claimed in claim 2, wherein the rotation of the pushing lever (6) pushes the horizontal lever (7) of the roving stop motion.

4. The arrangement as claimed in claim 3, wherein the pushing of horizontal lever (7) makes the coupling to release the stopped roving material.

5. A method for resetting the roving stop motion mechanism of a Ring frame by means of a service robot (8), comprising:
pushing or pulling a finger lever (5), positioned at one end of a rotatable rod (3) of an actuating assembly (2) and mounted on a fulcrum point (4), by an actuating lever (9) of a service robot (8) thereby rotating said pushing lever (6) in its fulcrum point (4) by rotation of said rotatable rod (3);
pushing a horizontal lever (7) pushably attached with said pushing lever (6) by the rotation of said pushing lever (6);
releasing a stopped roving material by a coupling (10) positioned at the end of said horizontal lever (7).