DESC:
TECHNICAL FIELD OF THE INVENTION
The present subject matter described herein, relates to textile ring spinning machines. Particularly, the invention relates to an automatic yarn piecing apparatus integrated semi auto doffing unit in ring spinning machines.

BACKGROUND OF THE INVENTION
Ring spinning is a method of spinning fibres, such as cotton, flax and/or wool, to make a yarn. Ring spinning machine spinning a yarn from a roving supplied by a speed frame and for winding said yarn onto a cop, is well known in the prior-art. The ring spinning technique is normally a labor-intensive method.

In textile ring spinning machines, the yarn is produced from the fibres which are drafted and twisted and then wound on a cop or bobbin using different active parts. The common and frequent problems of yarn breakage is happened that requires continuous attention of the workforce and it is a major disadvantage in ring spinning machines.

In ring spinning machine the yarns tends to break because of various reasons like low quality material, fast speed of machine, setting of the pressure, heat generated during the spinning, and improper settings in the machines etc. The main job of the labourers involved in this process is to continuously monitor the spinning machine and check if there is an occurrence of the yarn breakage during the process. The workforce may also be responsible for finding the defective spindle occurrences that may include but not limited to a yarn breakages. The broken yarns have to be pieced manually and the yarn spinning sequence has to be restarted then and there after yarn breakage in order to avoid wastage of yarn.

However, as humans are involved, the process of monitoring and ensuring is not effective and involves substantial delay in detection of the above defects, and even if the defect is detected, attending such defects is a time-consuming process. Further, if the defect occurs at multiple points in the machine, it is very difficult to attend the same by a single labourer/person. In the present scenario, one person is handling the multiple Ring spinning machine. Hence, a plurality of labourers have to be hired and accordingly the initial cost of the process is increased. Furthermore, the human interventions tend to be unreliable and ineffective.

In textile application the skilled labors have to arrange the piecing operation for each end every breakage of the yarn during running of the machine which is laborious, consumes more time and production loss. It is very difficult to get the required number of skilled labours during peak seasons. In order to avoid this extreme shortage of time, labour and the cost of labour is increasing steeply.

In the upgradation of the technology, automatic piecing devices are provided as an alternative towards the conventional techniques of manual piecing in ring spinning machine. Such automatic piecing devices/equipment/ apparatus having the multi axis screw rod system which has inbuilt drive and pivoted levering robatic arm movement with tensioner levering mechanism in a piecing assembly movable along the length of the ring spinning machine. At a broken yarn spindle location, such automatic piecing unit are placed based on the signal for piecing process/ operation and return to their home position or it is continuously running on the railing to the entire length of the ring spinning machine after completion of the piecing process.

Reference is being made to IN202041021597. This patent document relates to an automatic yarn piecing apparatus (9) of a textile ring spinning machine (1) and a method of piecing the broken yarns to drafted fibre strands. The yarn piecing apparatus (9) comprises a lifting unit for lifting the broken yarn from the cop (8), a suction unit (10) adapted to accommodate the broken yarn lifted by the lifting unit, and a piecing unit (11) configured to join a tail end (15) of the broken yarn to a fibre strand drafted by a drafting unit (4). The piecing unit (11) comprises a positioning device (12) adapted to perform an over-piecing process to merge the tail end (15) of the broken yarn to the fibre strand. The positioning device (12) is provided with a yarn joining device (19) configured to move in horizontal and traverse directions with respect to the drafting unit (4) to perform over-piecing.

CN 102560770 B discloses automatic detection of yarn breakage, automatic piecing method and apparatus. In the document CN102560770 B, the yarn breakage automatic detection, automatic piecing method, the ring rail flanking additional rail and dolly, moving trolley carrying wire spool is used, the controller controls the moving carriage reciprocates on the guide rail, inductance coil probe detection off head, robot will use the intercepted virtual strip length of wire and yarn pipe.

EP0421157B1 discloses a ring spinning machine having means for spinning a yarn from a roving supplied by a fly frame and for winding said yarn onto a cop, further disclosing a travelling service carriage which carries an auxiliary bobbin with an auxiliary yarn, from which, in the event of rectification of a yarn break, a piece of yarn is applied to the cop and pieced to the roving. The service carriage is provided with means for monitoring the success of an attempt to rectify a yarn break. The means are connected to a control unit with controls means on the service carriage for removing from the cop a piece of auxiliary yarn used in a failed attempt, before a further attempt is made to rectify the yarn break.

However, this document does not disclose the auto piecing system with multi axis screw rod mechanism, yarn tensioner, encoder system, moving controlling lever mechanism, integrated detachable unit, rotary blow tube mechanism etc,.. and gaiting piecing system and integrated features of semi auto doffing solution and automatic electromechanics controlled blowing pipe rotation/tilting mechanism used in overhead travelling cleaner with automatic piecing unit in order to maintain the constant cleaning efficiency of the ring frame and avoid the damages of the piecing units during running. The additional full wounded bobbin is placed inside the auto piecing unit for gaiting process as a special feature. Gaiting process is important before start to run the ring spinning machine after doffing process. Piecing the restart end (gaiting) of the yarn after completing the doffing process.

Therefore, there remain a need for an automatic yarn piecing apparatus with multi axis screw rod mechanism and integrated semi auto doffing unit in ring spinning machines which enables integrated features of semi auto doffing solution and automatic electromechanics controlled blowing pipe rotation/tilting mechanism used in overhead travelling cleaner with automatic piecing unit in order to maintain the constant cleaning efficiency of the ring frame and avoid the damages of the piecing units during running

SUMMARY OF THE INVENTION
The following disclosure presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an extensive overview of the present invention. It is not intended to identify the key/critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concept of the invention in a simplified form as a prelude to a more detailed description of the invention presented later.

The main object of present invention is to address and remove all the above limitations.

An object of the present invention is to develop an auto yarn piecing equipment with multi axis screw rod mechanism capable of piecing the yarn to deliver fibre strands in ring spinning machines and its methodology with / without integrated semi auto doffer system.

Another object of the present invention is to provide an automatic yarn piecing equipment with encoder and yarn tensioner levering mechanism capable of increasing the accuracy of the linear movement and its methodology.

Further object of present invention is to develop the multi axis screw rod mechanism for auto yarn piecing with integration of semi auto doffing system for textile Ring frame machines.

Further object of present invention is to provide multi axis screw rod mechanism for automatic yarn piecing system with integration of semi-automatic doffing system for Ring spinning machine.

Another object of the present invention is provide one full wounded bobbin placed inside the auto piecing unit with yarn picking actuating levering mechanism for piecing process as a special design known as “gaiting” process. Gaiting process is also one of the piecing process during the running of the ring spinning machine after completion of the doffing process. The special levering mechanism includes yarn nozzle for catching and lifting a yarn from wounded cop which is placed inside the auto piecing machine of the ring spinning machine, a yarn nozzle for accommodating the yarn lifted by the servo mechanism unit, and joining/ merge a tail end of the yarn to fibre strand drafted by a drafting unit as a restart breakage piecing process (gaiting).

Yet another object of present invention is to provide integrated features of semi auto doffing solution and programmed automatic electromechanics controlled blowing pipe rotation/tilting mechanism used in overhead travelling cleaner with automatic piecing unit in order to maintain the constant cleaning efficiency of the ring frame and avoid the damages of the piecing units during running.

Another object of present invention is to introduce the multi axis screw rod and electric drive automatic mechanism with levering attachment to maintain the consistence of efficiency, safety and cost effectiveness in auto piecing.

First aspects of the present invention is to provide a multi-axis auto piecing assembly with integration of semi-auto doffing system for a ring spinning machine, the assembly comprising at least one screw rod assembly , at least one cylinders, at least one yarn tensioner , at least one guide rollers, at least two guide rails, at least one sub-assembly, at least one servo motors, at least two sensors, at least one suction unit, at least one integrated detachable unit, at least one electronic unit assembly with HMI, at least one timing pulley , at least one rotary blow tube , at least one orifice blow tube , at least one vacuum tunnel and at least one bearing block wherein the assembly having separate drive motors and/or guide rollers provided with end detecting sensors and/or safety sensors permanently installed at both ends of the guide rail for semi-auto doffer machine/apparatus.

Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention.

BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS
The above and other aspects, features and advantages of the embodiments of the present disclosure will be more apparent in the following description taken in conjunction with the accompanying drawings, in which:

Figure 1 illustrates the overall assembly of the multi axis screw rod auto piecing system/unit.

Figure 2 illustrates the overall assembly of the multi axis screw rod auto piecing system/unit with integration of semi auto doffer machine by auto detachable unit.

Figure 3 illustrates the functional sides of the overall assembly of the multi axis screw rod auto piecing system/unit with integration of semi auto doffer machine by auto detachable unit.

Figure 4 illustrates the internal assembly view of the multi axis screw rod auto piecing system /unit with integration of semi auto doffer machine and auto detachable unit.

Figure 5 illustrates the internal assembly view of the bobbin gaiting piecing process and yarn tensioner assembly system in accordance with an embodiment of the present invention.

Figure 6 illustrates the assembly view of the angular lifting levering unit with vacuum tunnel for lappet lifting and catching the tail end yarn in accordance with a present invention.

Figure 7 illustrates the positions view of the yarn tensioner assembly with rotary actuator to control the tension of the yarn in accordance with an embodiment of the present invention.

Figure 8 illustrates the positions view of the rotary assembly to blow the air for positioning the ring traveller in to the correct position to insert the yarn.

Figure 9 illustrates the positions of the yarn picking from the cop of the ring spinning machine by the vacuum nozzle in accordance with an embodiment of the present invention.

Figure 10 illustrates the positions view of the yarn sucking by yarn nozzle with servo drive to pull the tail end from the collecting box in accordance with an embodiment of the present invention.

Figure 11 illustrates the positions view of the yarn sucking by yarn nozzle with servo drive to join the tail end yarn into the rollers in accordance with an embodiment of the present invention.

Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may not have been drawn to scale. For example, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various exemplary embodiments of the present disclosure. Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures.

DETAILED DESCRIPTION OF THE PRESENT INVENTION
The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of various embodiments of the present disclosure as defined by the claims and their equivalents. It includes various specific details to assist in that understanding, but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the various embodiments described herein can be made without departing from the scope and spirit of the present disclosure. In addition, descriptions of well-known functions and constructions may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the present disclosure. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present disclosure is provided for illustration purpose only and not for the purpose of limiting the present disclosure as defined by the appended claims and their equivalents.

It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, a reference to “a component surface” includes a reference to one or more of such surfaces.

All terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments belong. Further, the meaning of terms or words used in the specification and the claims should not be limited to the literal or commonly employed sense but should be construed in accordance with the spirit of the disclosure to most properly describe the present disclosure.

The terminology used herein is for the purpose of describing particular various embodiments only and is not intended to be limiting of various embodiments. As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising” used herein specify the presence of stated features, integers, steps, operations, members, components, and/or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, members, components, and/or groups thereof. Also, Expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list.

The present disclosure will now be described more fully with reference to the accompanying drawings, in which various embodiments of the present disclosure are shown. The present disclosure may, however, be embodied in many different forms and should not be construed as being limited to the various embodiments set forth herein, rather, these various embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the present disclosure. Furthermore, a detailed description of other parts will not be provided not to make the present disclosure unclear. Like reference numerals in the drawings refer to like elements throughout.

The present invention provides a multi axis screw rod auto piecing unit comprising a screw rod, guide rollers, cylinders, servo motors, sensors, guide ways, yarn tensioner, suction unit, timing pulley, yarn guide rod, rotary blow tube, orifice blow tube, bearing block etc,. This system have the separate drive motor and its guide rollers. The body includes the sub assembly such as bottom screw rod assembly, middle suction unit assembly, Side screw rod multi axis assembly, top motors assembly, yarn pulling unit assembly, breaking unit assembly, encoder assembly, blowing unit assembly, rotary blow pipe assembly and apparatus. The end detecting sensors and safety sensors is permanently installed at both ends of the guide rail. Near end of the two guide rails are provided with angle plates to push the rollers.

This system consists of main multi axis screw rod and servo motor (7). Electro mechanic includes integrated detachable unit (5) bearing block (18) yarn detecting (17) and rail detecting sensors (18) PLC controller, driven gear (3) encoder unit (12) Linear cylinder (27) Moving controlling unit (10), Yarn tensioner (24) and yarn guide rod (25). The auto piecing system have both sides automatic electro mechanic control mechanism equipped with the rolling arrangement. The present invention relates to an automatic yarn piecing apparatus with multi axis screw rod system and electric drive mechanism for piecing broken yarn ends in textile ring spinning machines. More particularly, the invention deals with handling the piecing of broken yarns in an automatic yarn piecing machine using multi axis screw rod system of textile ring spinning machines and its methodology with /without integrated semi auto doffer unit.

The present invention of the automatic yarn piecing equipment has a screw rod controlled sliding and up and down moving unit for catching the broken yarn from the wounded cop of the ring spinning machine using multi point orifice blow tube and its vacuum tunnel, and then rotating arm for joining an end of the broken yarn to drafted fibre strand of the ring spinning machine. The rotating spring tensioner unit is provided and configured to move in multi directions with respect to the drafting location to perform over-piecing.

In the present invention, the multi axis screw rod type auto piecing equipment includes a vacuum tube connected with vacuum tunnel assembly and yarn sensing device. This assembly performs to control the sucking limit for excess length of the broken yarn in order to avoid the cutting opertion of yarn. This includes a poly carbonate vacuum tube, flexible hose, collecting box and a yarn sensor. The yarn sensor performs to stop the suction and avoid the excess yarn enter into the collecting box. The encoder and its mechanism performs to control, measure and monitor the movement of the ring rail displacement.

According to the present invention, the vertical operated locking lever is provided to control the rotation of the spindle by applyling the brake to a spindle location at the time of piecing operation. The servo motorised yarn nozzle is hinged with spring actuating mechanism and to move the tail end of the broken yarn by the indexing system in between the front rollers and the middle rollers for the piecing process. The nozzle along with carried yarn is moved both left and right sides of the rollers to perform the piecing for yarn breakage according to the required directions of the operation.

In the present invention, the vacuum tunnel is provided with the actuating cylinder, poly carbonate tube is connected with sensor to suck the tail end of the broken yarn and stop the suction effect after sensing the yarn by the sensor in order to avoid the cutting of the excess yarn. The tail end of the broken yarn is caught by the yarn nozzle by applying a vacuum and indexing movement.

According to the present invention, an integrated detachable unit is provided at side of the auto piecing unit in order to integrate the semi auto doffer unit for doffing process. The detachable mechanism are mechanical, pneumatic or electromechanics type. The encoding unit controls the and follow the movement of up and down direction of the ring rail to maintain the accuracy.The electronic device of the auto piecing unit is logically programmed to suit/integrate/control the function of over head travelling cleaner based on the auto piecing unit direction of traverse movement and function in the ring spinning machine during piecing process/operation.

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine, the assembly (100) comprising, at least one screw rod assembly (9), at least one cylinders (11), at least one yarn tensioner (24), at least one guide rollers, at least two guide rails, at least one sub-assembly, at least one servo motors (7), at least two sensors, at least one suction unit, at least one integrated detachable unit, at least one electronic unit assembly with HMI (1), at least one timing pulley (21), at least one rotary blow tube (26), at least one orifice blow tube (19), at least one vacuum tunnel (15) and at least one bearing block (18) wherein the assembly having separate drive motors and/or guide rollers provided with end detecting sensors and/or safety sensors permanently installed at both ends of the guide rail for semi-auto doffer machine/apparatus.

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the sub assembly inside the body of said assembly (100) comprising at least one bottom screw rod assembly, middle suction unit assembly, breaking unit assembly, encoder assembly (12), blowing unit assembly and rotary blow pipe assembly.

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the integrated detachable unit comprising a detachable unit (5), a bearing block (18), a yarn detecting sensor (17), a rail detecting sensor (18), PLC controller, driven gear (3), encoder unit (12), a linear cylinder (27), moving controlling unit (10), yarn guide rod (25).

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the electronic unit assembly with HMI (1) comprising drive rollers (2), non-drive rollers (3), side guide (14) placed on the railing and travel to an entire length of the ring spinning machine.

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the multi axis auto piecing system involve both sides automatic electro mechanic control mechanism equipped with the rolling arrangement.

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the integrated detachable unit (5) running on the railing during the doffing process.

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the auto piecing unit perform continuously piecing process on successful completion of doffing process wherein the detachable unit automatically disengaged the linking mechanism and remove the auto piecing unit to perform.

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the side roller (14) guiding round tube to maintain an orientation and/or smooth running of the machine by running on the railing of the auto piecing unit.

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the multi orifice blow tube (19) loosens the broken yarn from the cop/bobbin by blowing the compressed air at the bottom of the spindle.

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the vacuum tunnel unit (15) sucks the broken yarn from the cop/bobbin to make the yarn travel into the polycarbonate tube (31).

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the servo operated vacuum nozzle (8) stops the travel of the yarn based on the sensing unit for catching the broken yarn from the vacuum tunnel.

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the vacuum tunnel (15) inserts the yarn into a traveler, ABC ring (34), lappet for holding the yarn until the completion of the joining.

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the servo operated vacuum nozzle (8) joins the broken tail end of the yarn to the drafted fibres in the drafting assembly of the ring spinning machine (35).

In a non-limiting embodiment, the present invention provides a sub assembly inside the body of a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the breaking unit assembly comprising braking lever (13) placed at the bottom of the auto piecing device/assembly and/or connected with the air cylinder (11) to arrest the spindle rotation by actuating the cylinder in order to start the piecing process of the broken yarn.

In a non-limiting embodiment, the present invention provides a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the servo operated vacuum nozzle (8) moves from its initial position to towards the ring spinning machine (35) to carry forward the tail broken yarn (36) up to the drafting rollers (37).

In a non-limiting embodiment, the present invention provides a sub assembly inside the body of a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine wherein the encoding system (12) follow the movement of up and down direction of the ring rail to maintain the accuracy.

Referring to Figure. 1, the auto piecing unit assembly comprises the enclosure and electronic unit assembly with HMI (1), equipped with drive rollers (2), non drive rollers (3) and side guide (14) which place on the railing and travel to the entire length of the ring spinning machine.

As illustrates in Figure 2 and 3, the integrated unit with semi auto doffer machine and integrated detachable unit (5) running on the railing during the doffing process. After completing the doffing process, the detachable unit is automatically disengaged the linking mechanism and remove the auto piecing unit to do the continuous/intermediate piecing process/operation.

As illustrates in Figure 4, During running on the rialing of the auto piecing unit, the side roller (14) is guiding the round tube to maintain the orientation and smooth running of the machine. when there is a indication and identify the yarn breakage through sensor, the auto piecing unit comes in front of the spindle location and it includes multi orifice blow tube (19) for blow the compressed air at the bottom (upstream) of the spindle to loosen the broken yarn from the cop / bobbin, a vacuum tunnel unit (15) for suck the broken yarn from the cop (33), travel the yarn in to the poly carbonate tube (31), stop the travel of the yarn based on the sensing unit, at least a servo opertared vacuum nozzle (8) for catching the brocken yarn from the vacuum tunnel, inserting the yarn into a traveler, ABC ring (34) and lappet, and a vacuum tunnel (15) for holding the yarn yarn until the the completion of the joining, and a servo operated vacuum nozzle (8) for joining the broken tail end of the yarn to the drafted fibres in the drafting assembly of the ring spinning machine (35).

According to the present invention, the braking lever (13) is placed at the bottom of the auto piecing device and connected with the air cylinder (11). The braking lever is arrest the spindle rotation by actuating the cylinder in order to start the piecing process of the broken yarn. This braking lever (13) is operating with time delay according to the compressed air deliver from the multi point orifice tube (19). After completion of the tail end yarn sucking and catching operation by the servo operated vacuum nozzle (8), the braking lever is released the spindle to resume the yarn winding oprearion onto the cop.

According to the present invention, the servo operated vacuum nozzle (8) moves from its initial position to towards the ring spinning machine (35), hence the tail broken yarn (36) is carried forward up to the drafting rollers (37). The tail broken yarn is brought up to front drafting roller pair (38) of the drafting roller assembly and join the tail broken tail end yarn (36) with the drafting fibre strand between the drafting rollers and to complete the piecing process of the cop for the particular identified spindles of the ring spinning machine.

According to the present invention, the multi axis screw rod mechanism (9) is provided to operate the entire movement of the moving controlling lever (10), bearing block (18), multi orifice blow tube (19), rotary blow tube (26), lappet lifting system (29) and rotary cylinder assembly. The entire operation of the auto piecing system is controlled by the multi axis screw rod mechanism/device.

According to the present invention, the encoding system (12) is provide to control and follow the movement of up and down direction of the ring rail in order to maintain the accuracy. According to the present invention, the rotary cylinder/actuators is provided to operate the yarn tensioner (24) during the piecing process. The yarn tensioner (24) is to stretch the yarn during the piecing process by the servo operated vacuum nozzle (8). The multi axis screw rod (9) facilitate the movement of the said yarn positioning assemblies in x-y-z directions, according to the requirement. The indication lamp (22) is to indicate the function of the process and the timing pully (21) and belt (22) are used to control the y axis of the yarn tensioner (24).

Figure 5 illustrates the internal assembly view of the bobbin gaiting piecing process and yarn tensioner assembly system.Figure 6 illustrates the assembly view of the angular lifting levering unit with vacuum tunnel for lappet lifting and catching the tail end yarn. Figure 7 illustrates the positions view of the yarn tensioner assembly with rotary actuator to control the tension of the yarn. An isometric view of the yarn guide rod (25) and yarn tensioner (24) assembly (figure 5) according to the present invention is shown in Figure. 5 to 7 of the drawings. The yarn guide and yarn tensioner assembly as shown comprises a piecing which is provided for yarn positioning and tensioning, wherein a vacuum nozzle (8) is provided for handling the yarn received from the vacuum tunnel (15). The servo operated vacuum nozzle (8) is operated as an indexing method of the horizontal movement is left to right angular movement or right to left angular movement towards the rollers or away from it based on the programmable path of the indexing. A rotary nozzle (11) with spring operated is provided to blow the compressed air into the bottom of the spindle to locate the ring traveller at correct position to insert the yarn into the traveller (39). A servo motor (7) is used to move the vacuum nozzle (8) in horizontal , vertical and angular direction, which is parallel to drafting rollers to the entire of the the piecing process. Since the vacuum nozzle (8) is hinged at servo motor with tensional spring, the inclined angle extended position based on the calculated value of the program and it moves in traverse or radial direction, which is perpendicular to drafting rollers. The special sensor (not shown in figure) is provided to monitoning and control the displacement of the rail lowering and uppering movement and measuring the displacement of the movement also.

Figure 8 illustrates the positions view of the rotary assembly to blow the air for positioning the ring traveller in to the correct position to insert the yarn.Figure 9 illustrates the positions of the yarn picking from the cop of the ring spinning machine by the vacuum nozzle in accordance with an embodiment of the present invention. Figure 10 illustrates the positions view of the yarn sucking by yarn nozzle with servo drive to pull the tail end from the collecting box in accordance with an embodiment of the present invention. According to the present invention, the servo operated vacuum nozzle (8) moves from its initial position to towards the ring spinning machine (35), hence the tail broken yarn (36) is carried forward up to the drafting rollers (37). The tail broken yarn is brought up to front drafting roller pair (38) of the drafting roller assembly and join the tail broken tail end yarn (36) with the drafting fibre strand between the drafting rollers and to complete the piecing process of the cop for the particular identified spindles of the ring spinning machine.

Figure 11 illustrates the positions view of the yarn sucking by yarn nozzle with servo drive to join the tail end yarn into the rollers in accordance with an embodiment of the present invention.

According to the invention, the full wounded cop (28) is placed inside the auto piecing unit and it is used to piece the yarn as a “gaiting process” after completion of each and every doffing process by using the actuating lever mechanism. In the present invention illustrates the manner in which the broken portion of the tail yarn from the cop is held in the vacuum nozzle. When the auto piecing unit moves towards the spinning spindle location in case of yarn breakage, a spindle brake actuating levering mechanism applies brake to the running spindle of the rotating cop (33). A suction force is created due tio the vacuum at inside of the nozzle and the tail yarn from the cop (33) is carried by the vacuum nozzle itself for a predetermined period during piecing action.The auto yarn piecing comprised in a automatic levering mechanism, in particular can be realized as one or multiple arms of a mechanism controlled by the multi axis screw rod system. The levering mechanism can be moves combined with pneumatic, mechanical and electronically. The additional full wounded bobbin is placed inside the system for the gaiting process as a special feature. Gaiting process is important before start to run the ring spinning machine after doffing process. Piecing the restart end (gaiting) of the yarn after completing the doffing process. The yarn tensioner means holding a yarn can allow for threading this yarn into the traveller and ABC ring through the yarn guide rod and yarn holding tube. The yarn holding tube means can comprise the suction and connected with mechanical block with spring, whose movement are used for piecing together a held yarn and a loose end of a yarn thus being part of the yarn piecing into the yarn and the suction effect maintain continuously until the piecing process completed. The yarn threading can comprise the first yarn threading; the yarn piecing can comprise both first and second yarn threading. For the entire application, the suction can be used synonymously with a suction tube and the drafted material can be provided by a ring spinning machine, wherein the drafted material is typically provided by delivery rollers of the spinning machine.

Henceforth, the present invention proposes a multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine. The multi axis screw rod and electric drive automatic mechanism with levering attachment to maintain the consistence of efficiency, safety and cost effectiveness in auto piecing.

The present invention offers multiple technical advantages out of which few have been enumerated below for ease of understanding:
1) The system is introduced in Ring spinning machines at both sides and placed on the rectangular tube railing system which is used for the same semi auto doffing system. Both the systems are running on the same railing arrangement with chain drive power supply system for incoming supply. Actuation of this mechanism, the multi axis screw rod assembly elements are fixed on the mounting plate which is surface contact on the angle and it sliding to the multi direction by actuating the stepper motor which is assembled with the attachment of guide ways. The proximity sensors are placed with mounting plates to control the displacement of the axial movement .
2) The multi axis screw rod systems are used to operate the movement of the suction device, levering system, blowing air tubes and locking system at specified time and distance. When the auto piecing system reaches at near the yarn breakage spindle, the flat gear assembly mechanism actuated by the stepper motor and its oscillating tube, one end of the tube is directly connected with square block and other end is fixed with surface plate with motor assembly. The drive gear assembly is directly connected with stepper motor shaft and it fixed with blowing plate. When the auto piecing unit is travelling, the blowing pipe on the Over head travelling unit along with the nozzles are turned out and then return to its original position and there is no hitting to piecing unit. Because of this invention, the nozzles which are fixed blowing pipe do not disturbed the any direction and position for its next cycle of operation. In spite of having an automatic detection of the defects in the machine, the humans are involves for attending the defects ie,. the labourers are carried to that particular location using automatic monitoring the breakage system and then the humans attend the defects. However, due to the involvement of the humans in the process, there still exists the above mentions issues including the human interventions which are not reliable, effective and efficient.
3) The proposed system can decrease production losses; and increase effectiveness, efficiency of the yarn production processes.By using the encoder system and its mechanism, it acts as an non surface contact on the ring rail and it gives the perfect sliding operation for every vertical movement with respect to the ring rail movement to support the piecing process. Due to the non surface contact, the marking and the damage on the Ring rail will not happen and subsequently the free movements are ensured.
4) If the travelling machine runs without this integrated mechanism in multi axis screw rod auto piecing system, the nozzle and hoses hits in every cycle of travelling and it creates the marking, damages and it will not allow the working function of piecing unit. By using this mechanism, the problem can be eliminated.
5) By providing this system, it improves the cleaning efficiency of the machine wherever using the auto piecing unit. Cleaning efficiency of this invention has been improved from the critical parts by providing the adjustable movement of the blowing pipe due to the integrated features to control the function of overhead travelling unit.

The foregoing description of the present invention has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the invention to the precise form or forms disclosed, and other modifications and variations may be possible in light of the above teachings wherein those of skill in the art will recognize certain modifications, permutations, additions and sub combinations thereof.
,CLAIMS:
1. A multi-axis auto piecing assembly (100) with integration of semi-auto doffing system for a ring spinning machine, the assembly (100) comprising:
- at least one screw rod assembly (9);
- at least one cylinders (11);
- at least one yarn tensioner (24);
- at least one guide rollers;
- at least two guide rails;
- at least one sub-assembly;
- at least one servo motors (7);
- at least two sensors;
- at least one suction unit;
- at least one integrated detachable unit;
- at least one electronic unit assembly with HMI (1);
- at least one timing pulley (21);
- at least one rotary blow tube (26);
- at least one orifice blow tube (19);
- at least one vacuum tunnel (15); and
- at least one bearing block (18),
wherein the assembly having separate drive motors and/or guide rollers provided with end detecting sensors and/or safety sensors permanently installed at both ends of the guide rail for semi-auto doffer machine/apparatus.

2. The assembly (100) as claimed in claim 1, wherein the sub assembly inside the body of said assembly (100) comprising at least one:
- bottom screw rod assembly;
- middle suction unit assembly;
- breaking unit assembly;
- encoder assembly (12);
- blowing unit assembly; and
- rotary blow pipe assembly.

3. The assembly (100) as claimed in claim 1, wherein the integrated detachable unit comprising:
- a detachable unit (5);
- a bearing block (18);
- a yarn detecting sensor (17);
- a rail detecting sensor (18);
- PLC controller;
- driven gear (3);
- encoder unit (12);
- a linear cylinder (27);
- moving controlling unit (10);
- yarn guide rod (25).

4. The assembly (100) as claimed in claim 1, wherein the electronic unit assembly with HMI (1) comprising:
- drive rollers (2);
- non-drive rollers (3);
- side guide (14) placed on the railing and travel to an entire length of the ring spinning machine.

5. The assembly (100) as claimed in claim 1, wherein the multi axis auto piecing system involve both sides automatic electro mechanic control mechanism equipped with the rolling arrangement.

6. The assembly (100) as claimed in claim 3, wherein the integrated detachable unit (5) running on the railing during the doffing process.

7. The assembly (100) as claimed in claim 6, the auto piecing unit perform continuously piecing process on successful completion of doffing process wherein the detachable unit automatically disengaged the linking mechanism and remove the auto piecing unit to perform.

8. The assembly (100) as claimed in claim 1, wherein the side roller (14) guiding round tube to maintain an orientation and/or smooth running of the machine by running on the railing of the auto piecing unit.

9. The assembly (100) as claimed in claim 1, wherein the multi orifice blow tube (19) loosens the broken yarn from the cop/bobbin by blowing the compressed air at the bottom of the spindle.

10. The assembly (100) as claimed in claim 1, wherein the vacuum tunnel unit (15) sucks the broken yarn from the cop/bobbin to make the yarn travel into the polycarbonate tube (31).

11. The assembly (100) as claimed in claim 1, wherein the servo operated vacuum nozzle (8) stops the travel of the yarn based on the sensing unit for catching the broken yarn from the vacuum tunnel.

12. The assembly (100) as claimed in claim 1, wherein the vacuum tunnel (15) inserts the yarn into a traveler, ABC ring (34), lappet for holding the yarn until the completion of the joining.

13. The assembly as claimed in claim 1, wherein the servo operated vacuum nozzle (8) joins the broken tail end of the yarn to the drafted fibres in the drafting assembly of the ring spinning machine (35).

14. The assembly (100) as claimed in claim 2, wherein the breaking unit assembly comprising braking lever (13) placed at the bottom of the auto piecing device/assembly and/or connected with the air cylinder (11) to arrest the spindle rotation by actuating the cylinder in order to start the piecing process of the broken yarn.

15. The assembly (100) as claimed in claim 1, wherein the servo operated vacuum nozzle (8) moves from its initial position to towards the ring spinning machine (35) to carry forward the tail broken yarn (36) up to the drafting rollers (37).

16. The assembly (100) as claimed in claim 2, wherein the encoding system (12) follow the movement of up and down direction of the ring rail to maintain the accuracy.