WO2022249005A1

WO2022249005A1 - Assembly and method for reducing doffing time for set of bobbins on ring spinning machine

Info

Publication number: WO2022249005A1
Application number: PCT/IB2022/054736
Authority: WO
Inventors: Prashant Khandu Narawade; Vedant Kailas Maval
Original assignee: Prashant Khandu Narawade; Vedant Kailas Maval
Priority date: 2021-05-27
Filing date: 2022-05-20
Publication date: 2022-12-01

Abstract

The present disclosure pertains to an assembly (100), and a method (800) for reducing doffing time for one or more set of bobbins. The assembly (100) includes a set of rail plates (102) adapted to accommodate one or more gripper bobbin holders (104), and facilitates replacing set of full bobbins (202) with set of empty bobbins (204) on ring spinning machine. The assembly (100) enables gripping the set of full bobbins (202) by means of self-operated bobbin holder (104) from top inner side and replacing with the set of empty bobbins (204) through rotation of one hundred and thirty five degrees to two hundred and twenty five degrees degree in addition to lifting and lowering the assembly. The assembly (100) enables operating in line with the ring spinning machine width and is safe and requires less space for operation.

Description

ASSEMBLY AND METHOD FOR REDUCING DOFFING TIME FOR SET OF BOBBINS ON RING SPINNING MACHINE

TECHNICAL FIELD

[0001] The present disclosure relates generally to field of textile devices. More particularly, the present disclosure provides an assembly and method for reducing doffing time for one or more set of bobbins on a ring spinning machine.

BACKGROUND

[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or is relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.

[0003] Doffing mechanism has replaced human efforts to remove fiber or yarn from main yard of machine and replace full bobbins with empty bobbins. Doffer more specifically auto doffer is widely used to remove full bobbins and insert empty bobbins. The existing mechanism consists of plurality of gripping devices operated pneumatically particularly called as grippers for each production center longitudinally along the length of ring spinning machine on both sides fitted on doffing beam / bar. The doffing beam having grippers fitted on it grips the bobbins from outer top side. Firstly removes the full bobbins from spindle and keeps the removed bobbins on conveyor which is located at bottom of the machine. Then grips the empty bobbins from conveyor or intermediate position to insert on spindle.

[0004] Ring spinning is having plurality of production centers ranging thousands of units per machine. The doffing bar length is bit less than the total machine length approx. 2- 3meters. During process of doffing, doffing beam has to move up and down, in and out many times from removing of full bobbins to inserting of empty bobbins on spindle hence it consumes time which is idle production time and machine is stopped resulting into loss of production. Depending on various counts i.e. linear density of yam doffing in a shift can be 10 times in shift of 8 hours also. So whenever bobbins are full, doffing is mandatory and hence resulting in loss of production in multiple.

[0005] Existing solutions can include limitations like replacing full bobbins with empty bobbins to commence production is time consuming with existing systems. Therefore, time to replace the full bobbins with empty is approximately two to three minutes after every cycle of doff. Further in existing system, doffing does not allow even small trolleys used for replacement of feed material bobbins to enter between machines during doffing to avoid accidents. Existing system requires more space other than machine width while operating as doffing bar swings from inside to outside in addition to width of machine. Another limitation includes where bobbins cannot be filled completely and needs to keep idle about 10 -15 mm from top while gripping at top outer side to remove once bobbin is full. Also, existing doffing mechanisms requires excess space while doffing operation and are not safe because, the mechanism assembly tilts from inside to outside and vice versa away from machine width. [0006] Existing solutions mandate overhead cleaner to be parked at either end away from set of spindles to avoid the malfunctioning in doffing beam or overhead cleaner which adds to idle time of machine or if the overhead cleaner is stopped earlier to doffing cycle, it hampers the continuous cleaning of machine. Existing solutions needs air to operate the grippers to grip the bobbins and related components which increase maintenance cost to change them at specific interval of time. Existing solutions needs separate conveyor to transport removed full bobbins to replace with empty bobbins because doffing beam cannot move laterally in close loop along both side of machine. A reference with Patent number US20180237959 discloses about a method for removing full bobbins from spindles of a ring spinning machine and for setting down empty sleeves on the spindles using a doffer is disclosed. The doffer has a beam and a rotatable gripping device that is mounted on the beam and has a sleeve gripper and a bobbin gripper, wherein the doffer is arranged next to the ring spinning machine. The beam is raised vertically and the gripping device is extended from the beam over the full bobbin. The invention also relates to a doffer having the corresponding drives. Another reference with Patent number CH 676724 discloses a method for the automatic simultaneous removal of bobbins provided with wound threads and the subsequent simultaneous attachment of sleeves to spindles of a spinning or twisting machine having a plurality of spinning positions, which, in order to provide the sleeves to be attached and to remove the removed bobbins, a transport device arranged in the machine longitudinal direction and for changing the bobbins and sleeves contains a gripper bar which extends in the machine longitudinal direction and which is provided with the spinning stations and which can be delivered to the spindles and the transport device, in which the sleeves are removed from the transport device, and when the machine is stopped, the bobbins are removed from the spindles and the sleeves are opened the spindles are plugged on and the spools are delivered to the transport device.

[0007] However, the cited references has drawbacks as the cited references have pneumatically operated grippers need air as well as maintenance cost and replacement cost of such elements. The time required for pressurizing air from source to individual gripper and vice versa cannot be avoided. Air leakage chances cannot be assured always. Also, doffer beam operates from bottom of machine which mandates increase in the distance between machines subsequently the floor space and increase in air conditioning cost. During doffing, it does not allow even small trolley in between machines to avoid accidents as well as overhead cleaner needs to park at other end which hampers continuous cleaning of the machine. Additional conveyor is required which can move along the length of machine on both sides from where doffer beam picks up empty bobbins and keeps the full bobbins because doffing beam cannot move laterally like conveyor.

[0008] There is a need to overcome above mentioned problem of prior art by bringing a solution that facilitates increasing productivity while doffing by saving time required for replacing full bobbins with empty bobbins. Also, the solution enables in allowing entry of trolleys as per requirement and reduces accident chances. The solution does not requiresextra floor space other than machine width with overhead cleaner as it operates inside of machine width thereby saving space and air condition expenses required for production of threads. The present solution facilitates filling bobbin completely without keeping the bobbin empty at top bobbin and enables lifting and lowering of full and empty bobbins from top inside, thereby reducing further chances of accident and mishappening. Present solution allows the overhead cleaner to clean machine continuously irrespective of doffing cycle. Present solution saves the cost of air and related parts replacement as it is self-operated. Present solution provides device and a method in single assembly performing as doffer and conveyer which can take full bobbins for unloading and bring empty loaded bobbins at specified position.

OBJECTS OF THE PRESENT DISCLOSURE

[0009] Some of the objects of the present disclosure, which at least one embodiment herein satisfies are as listed herein below.

[0010] It is an object of the present disclosure to provide a device and a method for reducing doffing time that facilitates gaining productivity by saving bobbin replacement time. [0011] It is an object of the present disclosure to provide a device and a method for reducing doffing time that allows to enter trolley etc. as and when required and eliminates threat of accidents.

[0012] It is an object of the present disclosure to provide a device and a method for reducing doffing time that does not requires extra space other than machine width with overhead cleaner as it operates inside of machine width thereby saving space. [0013] It is an object of the present disclosure to provide a device and a method for reducing doffing time that helps in saving air conditioning expenses required for production of threads.

[0014] It is an object of the present disclosure to provide a device and a method for reducing doffing time that allows to accommodate yarn till maximum bobbin top so additional yarn can be wound on same bobbin hence reducing the number of doffing cycles. [0015] It is an object of the present disclosure to provide a device and a method for reducing doffing time that facilitates filling bobbin completely without keeping the bobbin top empty.

[0016] It is an object of the present disclosure to provide a device and a method for reducing doffing time that enables in lifting and lowering of full and empty bobbins from top side, thereby reducing further chances of accident and mishappening.

[0017] It is an object of the present disclosure to provide a device and a method for reducing doffing time that eliminates extra expenses involved in use of air and related components replacement cost at specific interval associated with setup of ring spinning machine.

[0018] It is an object of the present disclosure to provide a device and a method for allowing continuous cleaning of overhead cleaner irrespective of doffing operation.

[0019] It is an object of the present disclosure to provide a device and method which elements the separate conveyor to feed empty bobbins to doffing and removing full bobbins after doffing.

SUMMARY

[0020] The present disclosure relates generally to field of textile devices. More particularly, the present disclosure provides an assembly and method for reducing doffing time for one or more set of bobbins on a ring spinning machine.

[0021] An aspect of the present disclosure pertains to an assembly for reducing doffing time for one or more set of bobbins on a ring spinning machine. The assembly may include a set of rail plates positioned at a pre-determined distance and arranged on both sides along length of the ring spinning machine from a first spindle out of a set of spindles of one end to the last spindle out of the set of spindles of other end adapted to accommodate one or more ring spinning gripper bobbin holders, positioned at a pre-determined variable distance by means of cam, camroll, spring and configured to move to and frofrom a first pre-determined position to a second pre-determined position, and move laterally to facilitate angular movement as well as complete assembly with rails having bobbin holders with bobbins can move laterally along the length of machine in closed loop from one side to other in casing for gear by means of rail roller.

[0022] In an aspect, the first pre-determined position may be the top most position pertaining to movement of a first set of bobbins from the one or more set of the bobbins, where the inner end of rail plate from the set of rail plates may include one or more ring spinning gripper bobbin holders and outer end of rail plate may include the first set of bobbins, where the set of rails may be parallel to each other and lowering the set of rails from a first pre-determined position to a second pre-determined position, where the outer end of rail plate may be at outer side of the ring spinning machine.

[0023] In an aspect, the second pre-determined position may facilitate gripping of a second set of bobbins from the set of bobbins and lifting the set of rail plates & second set of bobbins above the set of spindles top, where lateral movement of disengageable rack gear engages with rack pinion & turning of set of rail plates may facilitate angular movement of the first set of bobbins to the second set of bobbins and from the second set of bobbins to the first set of bobbins, and where lowering the set rail plates may facilitate the first set of bobbins sitting on the set of spindles and releasing the first set of bobbins.

[0024] In an aspect, lifting the set rail plates may facilitate moving the set of rail plates upward to the first predetermined position with the second set of bobbins on the outer end of rail plate and one or more gripper bobbin holders on the inner end of rail plate.

[0025] In an aspect, assembly of set rails ready to move laterally like conveyor by means of rail rollers in gear channel to unload the second set of bobbins and in feed the first set of bobbins on bobbin holders.

[0026] In an aspect, the one or more ring spinning gripper bobbin holders may be self- operated to grip and release one or more ring spinning bobbins.

[0027] In an aspect, the first set of bobbins may include set of empty bobbins, and where the second set of bobbins may include set of full bobbins.

[0028] In an aspect, the assembly may include piston, a disengageable rack gear, and a rack gear channel, and a pinion gear, bearing where the disengageable rack gear may slide laterally and horizontally in the rack gear channel and pinion gear may be fixed on the set of rail plates.

[0029] In an aspect, rack gear channel shaft may hold the cam stationary bigger side of cam faces towards the machine and smaller towards longitudinal direction of machine and cam rolls are pushed towards cam surface by means of springs. [0030] In an aspect, the piston may facilitate pushing the disengaged rack gear, where the rack gear may move in rack gear channel, engaging with pinion gear due to wavy surface in contact of rack gear outer side and inner side of wavy surface of rack gear channel allowing rotation of pinion gear and facilitates turning the set of rail plates configured with the one or more gripper bobbin holder, pivoted at pinion gear between one hundred and thirty five degrees to two hundred and twenty five degrees.

[0031] In an aspect, angular moment of set of rail plates may direct the cam roll to rotate on cam surface and allowing inner holder of the set of rail plates and outer holder of the set of rail plates to come closer and move apart in inner slot of the set of rail plates and outer slot of the set of rail plates (102).

[0032] In an aspect, one or more ring spinning gripper bobbin holders may beat maximum distance to avoid unnecessary physical contact with machine elements when the set of rail plates are parallel, and the one or more ring spinning gripper bobbin holders may be at minimum distance to avoid unnecessary physical contact with machine elements, first set and second set of bobbins when in line.

[0033] In an aspect, the assembly may include a driving assembly dispensed with a pulley, a roller support, a fitted beltor chain, one or more guide rollers, and one or more guide rails, where the one or more guide rollers may be configured in between the one or more guide rails.

[0034] In an aspect, the driving assembly may facilitate lowering and lifting of the assembly through the pulley and the roller support by means of the fitted belt or chain on casing for gear guided by the one or more guide rollers in between the one or more guide rails.

[0035] In an aspect, the one or more ring spinning gripper bobbin holders may facilitate gripping the one or more bobbins from top inside.

[0036] In an aspect, distance between the one or more set of rail plates may be equal to distance between the set of spindles.

[0037] Another aspect of the present disclosure pertains to a method for reducing doffing time for one or more set of bobbins on a ring spinning machine. The method may include a step of accommodating, at a set of rail plates positioned at a pre-determined distance & arranged on both sides along length of the ring spinning machine from a first spindle out of a set of spindles of one end to the last spindle out of the set of spindles of other end, where one or more ring spinning gripper bobbin holders, positioned at a pre-determined variable distance by means of cam, camroll, spring and configured to move to and frofrom a first pre- determined position to a second pre-determined position, and move laterally to facilitate angular movement, where the first pre-determined position may be the top most position pertaining to movement of a first set of bobbins from the one or more set of the bobbins, where the inner end of rail plate from the set of rail plates may include one or more ring spinning gripper bobbin holders and of rail plate may include the first set of bobbins, where the set of rail plate may be parallel to the outer.

[0038] In an aspect, the method may include a step of lowering, the set of rails from a first pre-determined position to a second pre-determined position, where the outer end of rail plate may beat outer side of the ring spinning machine, and where the second pre-determined position may facilitate gripping of a second set of bobbins from the set of bobbins.

[0039] In an aspect, the method may include a step of lifting the set of rail plates and second set of bobbins above the set of spindles top, where lateral movement of disengageable rack gear may engages with rack pinion and turning of set of rail plates may facilitate angular movement of the first set of bobbins to the second set of bobbins and from the second set of bobbins to the first set of bobbins, and where lowering the set rail plates may facilitate the first set of bobbins sitting on the set of spindles and releasing the first set of bobbins.

[0040] In an aspect, the method may include a step of moving the set of rail plates upward to the first predetermined position with the second set of bobbins on the outer end of rail plate and one or more gripper bobbin holders on the inner end of rail plate.

[0041] In an aspect, assembly of set rail plates may be ready to move laterally like conveyor by means of rail rollers in gear channel to unload the second set of bobbins and in feed the first set of bobbins on bobbin holders.

BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0043] The diagrams are for illustration only, which thus is not a limitation of the present disclosure, and wherein:

[0044] FIG. 1 illustrates a block diagram of proposed assembly for reducing doffing time for one or more set of bobbins on a ring spinning machine, in accordance with an embodiment of the present disclosure. [0045] FIG. 2-4 illustrate exemplary views of steps involved to carry out replacement of set of full bobbins with set of empty bobbins of the proposed assembly for reducing doffing time for one or more set of bobbins on a ring spinning machine, in accordance with an embodiment of the present disclosure.

[0046] FIG. 5-7 illustrate exemplary views of components involved in the proposed assembly for reducing doffing time for one or more set of bobbins on a ring spinning machine, in accordance with an embodiment of the present disclosure.

[0047] FIG. 8 illustrates an exemplary view of an assembly of set of rail plates involved in the proposed assembly for reducing doffing time for one or more set of bobbins on a ring spinning machine, in accordance with an embodiment of the present disclosure.

[0048] FIG. 9 illustrates an exemplary flow diagram of method for reducing doffing time for one or more set of bobbins on a ring spinning machine, in accordance with an embodiment of the present disclosure.

DETAIL DESCRIPTION

[0049] In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present invention. It will be apparent to one skilled in the art that embodiments of the present invention may be practiced without some of these specific details.

[0050] If the specification states a component or feature “may”, “can”, “could”, or “might” be included or have a characteristic, that particular component or feature is not required to be included or have the characteristic.

[0051] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.

[0052] While embodiments of the present invention have been illustrated and described, it will be clear that the invention is not limited to these embodiments only. Numerous modifications, changes, variations, substitutions, and equivalents will be apparent to those skilled in the art, without departing from the spirit and scope of the invention, as described in the claim.

[0053] The present disclosure relates generally to field of textile devices. More particularly, the present disclosure provides an assembly and method for reducing doffing time for one or more set of bobbins on a ring spinning machine. [0054] FIG. 1 illustrates a block diagram of proposed assembly for reducing doffing time for one or more set of bobbins on a ring spinning machine, in accordance with an embodiment of the present disclosure.

[0055] As illustrated in FIG. 1, the proposed assembly (100) (also referred to as assembly (100), herein), where the assembly can facilitate reducing doffing time for one or more set of bobbins. In an illustrative embodiment, the assembly (100) can be configured with existing ring spinning machine and enables in replacing a first set of bobbins from the one or more set of bobbins with a second set of bobbins from the one or more set of bobbins. In another illustrative embodiment, the first set of bobbins can include a set of empty bobbins and the second set of bobbins can include a set of full bobbins. In yet another illustrative embodiment, the assembly (100) can include a set of rail plates (102) with inner slots and outer slots, one or more gripper bobbin holders (104), a driving assembly (106), a piston (108), a rack gear (110), a rack gear channel (112), pinion gear (not shown), a cam (not shown), a cam roll (not shown), a spring (not shown) and a bearing (not shown ).

[0056] In an illustrative embodiment, the set of rail plates (102) can be adapted to accommodate the one or more gripper bobbin holders (104), and configured to move from a first pre-determined position to a second pre-determined position. In another illustrative embodiment, a setof rail plates (102) can bepositioned at pre-determined distance and arranged on both sides along length of the ring spinning machine from a first spindle out of a set of spindles of one end to the last spindle out of the set of spindles of other end can be adapted to accommodate one or more ring spinning gripper bobbin holders (104), positioned at a pre-determined variable distance by means of the cam, the camroll, the spring and configured to move to and fro from a first pre-determined position to a second pre determined position, and move laterally to facilitate angular movement.

[0057] In an illustrative embodiment, the first pre-determined position can be the top most position pertaining to movement of a first set of bobbins from the one or more set of the bobbins, where the inner end of rail plate from the set of rail plates (102) can include one or more ring spinning gripper bobbin holders (104) and outer end of rail plate can include the first set of bobbins, where the set of rail plate can be parallel to the outer and lowering the set of rails from a first pre-determined position to a second pre-determined position, where the outer end of rail plate can beat outer side of the ring spinning machine.

[0058] In an illustrative embodiment, the second pre-determined position can facilitate gripping of a second set of bobbins from the set of bobbins and lifting the set of rail plates (102) and second set of bobbins above the set of spindlestop, where lateral movement of disengageable rack gear (110) engages with rack pinion and turning of set of rail plates (102) can facilitate angular movement of the first set of bobbins to the second set of bobbins and from the second set of bobbins to the first set of bobbins, and where lowering the set of rail plates (102) can facilitate the first set of bobbins sitting on the set of spindles and releasing the first set of bobbins.

[0059] In an illustrative embodiment, lifting the set of rail plates (102) can facilitate moving the set of rail plates (102) upward to the first predetermined position with second set of bobbins (204) on the inner end of rail plate and one or more gripper bobbin holders (104) onthe outer end of rail plate.

[0060] In an illustrative embodiment, the assembly (100) of the set of rail plates (102) can be ready to move laterally like conveyor by means of rail rollers in gear channel to unload the second set of bobbins and in feed the first set of bobbins on the one or more ring spinning bobbin holders (104).

[0061] In an illustrative embodiment, the one or more ring spinning gripper bobbin holders (104) can be self-operated to grip and release one or more ring spinning bobbins. In another illustrative embodiment, the assembly (100) can include a piston (108), a rack gear (110), and a rack gear channel (112), pinion gear ( 210) where the rack gear (110), and the rack gear pinion (210) can be configured with the one or more set of rails (102) having gripper bobbin holder (104), where the piston (108) can facilitate pushing the rack gear (110), where the rack gear (110) can move in rack gear channel (112) and turning of pinion gear (210) which can facilitate turning the assembly of set of rails (102) between one hundred and thirty five degrees to two hundred and twenty five degrees.

[0062] In an illustrative embodiment, the assembly (100) can include a driving assembly (106) dispensed with a pulley (228), a roller support (232), a fitted belt or chain (226), one or more guide rollers (216), (218), and one or more guide rails (222), and (224), where the one or more guide rollers (216) (218), (220) can be configured in between the one or more guide rails (222), and (224). In another illustrative embodiment, the driving assembly (106) can facilitate lowering and lifting of the assembly (100) through the pulley (228) and the roller support (232) by means of the fitted belt or chain (226) on casing for gear (212) guided by the one or more guide rollers (216), (218), and (220) in between the one or more guide rails (222) and (224).

[0063] In an illustrative embodiment, the one or more ring spinning gripper bobbin holders (104) can facilitate gripping the one or more bobbins from top inside. In another illustrative embodiment, distance between the one or more set of rail plates (102)can be equal to distance between the set of spindles.

[0064] In an illustrative embodiment, the assembly can include a piston (108), a rack gear (110), a rack gear channel (112), and a pinion gear (210), where the rack gear (110), can slide laterally in the rack gear channel (112) and pinion gear (210) fixed on the set of rail plates (102). In another illustrative embodiment, the piston (108) can facilitate pushing the rack gear (110), where the rack gear (110) can moves in rack gear channel (112), allowing rotation of the pinion gear (210) and can facilitate turning the set of rail plates (102) configured with the one or more gripper bobbin holder (104), pivoted at pinion gear (210) between one hundred and thirty five degrees to two hundred and twenty five degrees. Angular moment of set of rail plates (102) directs the cam roll ( ) to rotate on cam ( ) surface thus allowing the inner and outer holder of rail to come closer and move apart in inner and outer slots of the rail plates. When set of rails ( ) are parallel to each other its widest distance between the inner and outer bobbin holder and when in line it’s the shortest distance. In yet another illustrative embodiment, the assembly (100) can facilitate lifting and lowering of set of full bobbins and the set of empty bobbins from top side, and aids in avoiding accidents and mishappening caused during doffing and working of ring spinning machine.

[0065] In an illustrative embodiment, the driving assembly (106) can include a pulley, a roller support, a fitted belt, one or more guide rollers, and one or more guide rails, where the one or more guide rollers can be configured in between the one or more guide rails. In another illustrative embodiment, the driving assembly (106) can facilitate lowering and lifting of the assembly (100) through the pulley, and the roller support by means of the fitted belt or chain on casing for gear (212) guided by the one or more guide rollers in between the one or more guide rails. In yet another illustrative embodiment, the assembly (100) can rotate from one hundred thirty five degrees to two hundred twenty five degree to replace the set of full bobbins with the set of empty bobbins.

[0066] In an illustrative embodiment, the one or more gripper bobbin holders (104) can facilitate gripping the one or more set of bobbins from inside. In an illustrative embodiment, the full set of bobbins (202) can be on spindle of the ring spinning machine and can be empties (204) at home position, where the home position can be the topmost position of the ring spinning machine. The empty set of bobbins (204) can be lowered down to level of the full set of bobbins (202) where the one or more bobbin gripper holders (104) can enter into each of full bobbin from the set of full bobbins. When full bobbin (202) is gripped by empty bobbin gripper (104) the bobbins full as well as empty are lifted to just above the spindle. The Lifted assembly rotates the bobbin from one hundred thirty five degrees to two hundred and twenty five degrees immediately so as to replace the position of full bobbin with empty bobbin and lowers the assembly on to the spindle. The gripper (104) releases the empty bobbin as soon as bobbin fits on to spindle. The released bobbin (204) remains on the spindle and full bobbin (202) moves along with assembly to home position. As soon as the full bobbin moves up with the spinning starts for next doff & assembly (100) of the set of rail plates (102) with full set of bobbins (202) moves as a conveyor to unload the fullset of bobbins (204) and feed the empty bobbins onthe oneor more ring spinning bobbin holders (104).

[0067] In an illustrative embodiment, the assembly (100) can facilitate in doffing time reduction in replacing the set of full bobbins (202) with set of empty bobbins (204) on the ring spinning machine with self-operating mechanism to grip the set of full bobbins (202) from top inner side and replacing with the set of empty bobbins (204) and rotating from one hundred thirty five degrees to two hundred and twenty five degrees in addition to lifting and lowering the complete assembly (100). In another illustrative embodiment, the assembly (100) can operate in line with the machine width and can be safe and less space consuming unlike existing doffing mechanisms where excess space can be required while doffing operation and not safe because the existing mechanism assembly can tilt from inside to outside and vice versa away from machine width.

[0068] FIG. 2-4 illustrate exemplary views of steps involved to carry out replacement of set of full bobbins with set of empty bobbins of the proposed assembly for reducing doffing time for one or more set of bobbins on a ring spinning machine, in accordance with an embodiment of the present disclosure.

[0069] FIG. 5-8 illustrate exemplary views of components involved in the proposed assembly for reducing doffing time for one or more set of bobbins on a ring spinning machine, in accordance with an embodiment of the present disclosure.

[0070] As illustrated in FIG. 2, the assembly (100) can include a set of rail plates (not shown), one or more gripper bobbin holder (not shown), a driving assembly (not shown), a piston (108), a rack gear (110), and a rack gear channel (112), pinion gear (210). In an embodiment, the assembly (100) can be configured with a ring spinning machine (interchangeably referred to as machine, herein) and similar machine for doffing and enables in reducing doffing time. In an illustrative embodiment, the assembly (100) can include the set of rail plates (102) adapted to accommodate one or more gripper bobbin holders (104) throughout length of the machine on both side of the machine. The set of rail plates (102) can move from top most position along with the one or more set of bobbins with set of empty bobbins (204) on outer side of rail plates and the one or more gripper bobbin holders (104) on inner side of rail plate. In another illustrative embodiment, when the set of rail plates (102) reaches to a predetermined position where the one or more gripper bobbin holders (104) can be in gripping position to the set of full bobbins (202) lowering can be stopped further by means of one or more end guide rollers (214).

[0071] In an illustrative embodiment, after gripping the set of full bobbins (202), the assembly (100) can lift above one or more set of bobbins top having a bit gap in between spindle top of the machine and the one or more set of bobbins bottom. The piston (108) can push the disengageable rack gear (110) laterally in the rack gear channel (112) and disengageable rack gear (110) engages with rack pinion (210) & turning of the set of rail plates (102) which turns the pinion gear (210) resulting in turning of the assembly (100) from one hundred thirty degrees to two hundred and twenty five degrees

[0072] In an illustrative embodiment, angular moment of the set of rail plates (102) candirect the cam roll (804) to rotate on cam (802) surface thus allowing the inner and outer holder of rail to come closer and move apart in inner and outer slots of the rail plates. When the set of rail plates (102) are parallel to each other its widest distance between inner and outer bobbin holder and when in line it’s the shortest distance. In another illustrative embodiment, rotation of the assembly (100) can be done by a rotating pinion gear (210) fitted on a vertical rod (238) by means of bearing (234) in between. The set of full bobbins (202) which were inner side of rail plate can reverses to outer side and the set of empty bobbins (204) which were outer side of rail plate and can come exactly in center above the spindle of the machine. In yet another illustrative embodiment, when the assembly (100) is lowered, the set of empty bobbins (204) can fix to required position. The one or more gripper bobbin holders (104) can facilitate releasing the set of empty bobbins (204) and can move upward withthe set of full bobbins (202) and empty one or more gripper bobbin holders (104).

[0073] In an illustrative embodiment, guide rails (222) and (224) can facilitate eliminating hindrances during the one or more set of bobbins change. The gripper bobbin holder (104) can be configured to grip the one or more set of bobbins from inside. In another illustrative embodiment, lowering and lifting of the assembly (100) can be done through a pulley (228) and a roller support (232) by means of a fitted belt (226) guided by one or more guide rollers (216), (218), (220) in between the guide rails (222) and (224). The assembly (100) can include the set of rail plates (102) parallel fitted to each other with gripper bobbin holders (104), where the set of rail plates (102) can include a pinion gear (210) and the rack gear (110) in connection with each other on rack gear channel (112) and movable laterally in casing for gear (212) by means of rail roller (208).

[0074] In an illustrative embodiment, the assembly (100) can be lifted and lowered by means of the belt or chain (226) fitted and guided be means of the one or more guide rollers (216), (218), (220) in between the guide rail (222) and guide rail (224). In another illustrative embodiment, the pulley (228) can be fitted on holder pillar (230), where the holder pillar (230) can guide the belt (226) towards the roller support (232). The set of rail plates (102) can be rotated at between one hundred and thirty five degrees to two hundred and twenty five degrees fitted on one end of the ring frame machine which can push and pull the rack gear (110) meshing with the pinion gear (210) fitted on a bearing (234) and on a vertical rod (238).

[0075] In an illustrative embodiment, disengage able rack gear (110) can engage when angular movement is required laterally pushing by piston (108) and remain disengaged in rest of time.

[0076] In an embodiment, FIG. 5 illustrates exemplary view of embodiments of the assembly (100).

[0077] In an embodiment, FIG. 6 illustrates exemplary view of the embodiments of the assembly with bottom one or more set of bobbins.

[0078] In an embodiment, FIG. 7 illustrates exemplary view of the embodiments of the assembly with set of full bobbins and the set of empty bobbins.

[0079] FIG. 8 illustrates an exemplary view of an assembly of set of rail plates involved in the proposed assembly for reducing doffing time for one or more set of bobbins on a ring spinning machine, in accordance with an embodiment of the present disclosure.

[0080] As illustrated in FIG. 8, the one or more ring spinning gripper bobbin holders (104) can be positioned at a pre-determined variable distance by means of a cam (802), a camroll (804), and a spring (806). In an embodiment, angular moment of set of rail plates (102) directs the cam roll (804) to rotate on cam (802) surface and allowing an inner holder of the set of rail plates (102) and outer holder of the set of rail plates (102) to come closer and move apart in inner slot of the set of rail plates (102) and outer slot of the set ofrail plates (102).

[0081] FIG. 9 illustrates an exemplary flow diagram of method for reducing doffing time for one or more set of bobbins on a ring spinning machine, in accordance with an embodiment of the present disclosure. [0082] In an embodiment, FIG. 9 illustrates a method (900) for reducing doffing time for one or more set of bobbins. The method (900) can include a step (902) of accommodating, at a setof rail plates (102) positioned at pre-determined distance and arranged on both sides alonglength of thering spinning machine from a first spindle out of a set of spindles of one end to the last spindle out of the set of spindles of other end, one or more ring spinning gripper bobbin holders (104), positioned at a pre-determined variable distance by means of a cam (802) , a camroll (804), and a spring (806) and configured to move to and fro from a first pre-determined position to a second pre-determined position, and move laterally to facilitate angular movement, where the first pre-determined position can be the top most position pertaining to movement of a first set of bobbins (202) from the one or more set of the bobbins, where the inner end of rail plate from the set of rail plates(102) can include one or more ring spinning gripper bobbin holders and outer end of rail plate can include the first set of bobbins, where the set of rail plate can be parallel.

[0083] In an embodiment, the method (900) can include a step (904) of lowering, the set of rails from a first pre-determined position to a second pre-determined position, where the outer end of rail plate can beat outer side of the ring spinning machine, and where the second pre-determined position can facilitate gripping of a second set of bobbins (204) from the set of bobbins.

[0084] In an embodiment, the method (900) can include a step (906) of lifting, the set of rail plates above the set of spindlestop, where lateral movement of disengageable rack gear ( 110) engages with rack pinion (210) and turning of set of rail plates (102) can facilitate angular movement of the first set of bobbins (202) to the second set of bobbins(204) and from the second set of bobbins (204) to the first set of bobbins (202), and where lowering the set of rail plates (102) can facilitate the first set of bobbins (202) sitting on the set of spindles (242) and releasing the first set of bobbins (202).

[0085] In an embodiment, the method (900) can include a step (908) of moving, the set of rail plates (102) upward to the first predetermined position with the second set of bobbins (204) on the outer end of rail plate and one or more gripper bobbin holders (104) on the inner end of rail plate.

[0086] As used herein, and unless the context dictates otherwise, the term "coupled to" is intended to include both direct coupling (in which two elements that are coupled to each other contact each other) and indirect coupling (in which at least one additional element is located between the two elements). Therefore, the terms "coupled to" and "coupled with" are used synonymously. [0087] It should be apparent to those skilled in the art that many more modifications besides those already described are possible without departing from the inventive concepts herein. The inventive subject matter, therefore, is not to be restricted except in the spirit of the appended claims. Moreover, in interpreting both the specification and the claims, all terms should be interpreted in the broadest possible manner consistent with the context. In particular, the terms “comprises” and “comprising” should be interpreted as referring to elements, components, or steps in a non-exclusive manner, indicating that the referenced elements, components, or steps may be present, or utilized, or combined with other elements, ' components, or steps that are not expressly referenced.

[0088] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE PRESENT DISCLOSURE

[0089] The present disclosure provides an assembly and a method for reducing doffing time that facilitates gaining productivity by saving bobbin replacement time.

[0090] The present disclosure provides an assembly and a method for reducing doffing time that allows to enter trolley etc. as and when required and eliminates threat of accidents. [0091] The present disclosure provides an assembly and a method for reducing doffing time that does not requires extra space other than machine width with overhead cleaner as it operates inside of machine width thereby saving space.

[0092] The present disclosure provides an assembly and a method for reducing doffing time that helps in saving air conditioning expenses required for production of threads.

[0093] The present disclosure provides an assembly and a method for reducing doffing time that allows to accommodate yarn till bobbin top so additional yarn can be wound on same bobbin hence reducing the number of doffing cycles.

[0094] The present disclosure provides an assembly and a method for reducing doffing time that facilitates filling bobbin completely without keeping the bobbin idle.

[0095] The present disclosure provides an assembly and a method for reducing doffing time that enables in lifting and lowering of full and empty bobbins from top side, thereby reducing further chances of accident and mishappening. [0096] The present disclosure provides an assembly and a method for reducing doffing time that eliminates extra expenses involved in use of air and related components replacement cost at specific interval associated with setup of ring spinning machine.

[0097] The present disclosure provides an assembly and a method for allowing continuous cleaning of overhead cleaner irrespective of doffing operation.

[0098] The present disclosure provides an assembly that is single assembly to facilitate performing for doffer and conveyer which can take full bobbins for unloading and bring empty loaded bobbins at specified position.

Claims

We Claim:

1. An assembly (100) for reducing doffing time for one or more set of bobbins on a ring spinning machine , the assembly (100) comprising: a set of rail plates (102) positioned at predetermined distance & arranged on both sides along length of the ring spinning machine from a first spindle out of a set of spindles (242) of one end to the last spindle out of the set of spindles (242) of other end, adapted to accommodate one or more ring spinning gripper bobbin holders (104) positioned at a pre determined variable distance and set of rail plates (102) configured to move to and fro from a first pre-determined position to a second pre-determined position, and move laterally to facilitate angular movement, wherein the first pre-determined position is top most position of the set of rail plates (102) pertaining to the movement of a first set of bobbins (202) from the one or more set of the bobbins, wherein the inner end of rail plate from the set of rail plates (102) includes one or more ring spinning gripper bobbin holders (104), and outer end of rail plate includes the first set of bobbins (202), wherein the set of rail plates (102) is parallel, and lowering the set of rail plates from a first pre-determined position to a second pre-determined position, wherein the outer end of rail plate is at outer side of the ring spinning machine, and wherein the second pre-determined position is the lowermost position of the set of rail plates (102) facilitates gripping of a second set of bobbins (204) from the set of bobbins and lifting the set of rail plates (102) and second set of bobbins above the set of spindles top, wherein lateral movement of the set of rail plates (102) facilitates angular movement of the first set of bobbins (202) to the second set of bobbins (204), and from the second set of bobbins (204) to the first set of bobbins (202), and wherein lowering the set of rail plates (102) facilitate the first set of bobbins (202) sitting on the set of spindles and releasing the first set of bobbins (202) on the set of spindles, and moving the set of rail plates (102) upward to the first predetermined position with second set of bobbins (204) on the outer end of rail plate and one or more gripper bobbin holders (104) on the inner end of rail plate, wherein the assembly is configured to move laterally.

2. The assembly as claimed in claim 1, wherein the one or more ring spinning gripper bobbin holders (104) are self-operated to grip and release one or more ring spinning bobbins from top inside.

3. The assembly (100) as claimed in claim 1, wherein the first set of bobbins (202) include set of empty bobbins, and wherein the second set of bobbins (204) include set of full bobbins.

4. The assembly (100) as claimed in claim 1, wherein the assembly (100) includes a piston (108), a disengageable rack gear (110), and a rack gear channel (112) the pinion gear (210), wherein the rack gear (110), slide laterally in the rack gear channel (112) and pinion gear (210) fixed on the set of rail plates (102) wherein the piston (108) facilitates pushing the rack gear (110), wherein the rack gear (110) moves in rack gear channel (112), allowing rotation of pinion gear (210) and facilitates turning the set of rail plates (102) configured with the one or more gripper bobbin holder (104), pivoted at pinion gear (210) between one hundred and thirty five degrees to two hundred and twenty five degrees.

5. The assembly as claimed in claim 1, wherein the one or more ring spinning gripper bobbin holders (104) are positioned at a pre-determined variable distance by means of a cam (802 ) , a camroll ( 804) , and a spring (806 ).

6. The assembly as claimed in claim 1, wherein angular moment of set of rail plates (102) directs the cam roll (804) to rotate on cam (802) surface and allowing an inner holder of the set of rail plates (102) and outer holder of the set of rail plates (102) to come closer and move apart in inner slot of the set of rail plates (102) and outer slot of the set of rail plates (102).

7. The assembly as claimed in claim 1, wherein the one or more ring spinning gripper bobbin holders (104) are at maximum distance when the set of rail plates (102) are parallel, and the one or more ring spinning gripper bobbin holders (104) are at minimum distance when in line.

8. The assembly (100) as claimed in claim 1, wherein the assembly (100) includes a driving assembly (106) dispensed with a pulley (228), a roller support (232), fitted belt (226), one or more guide rollers (216), (218), (218) and one or more guide rails (222), and (224), wherein the one or more guide rollers (216) (218), (220) are configured in between the one or more guide rails (222), and (224).

9. The assembly (100) as claimed in claim 1, wherein disengageable rack gear (110) engages when angular movement is required laterally pushing by piston (108) and remain disengaged in rest of time.

10. The assembly (100) as claimed in claim 4, wherein the driving assembly (106) facilitates lowering and lifting of the assembly (100) through the pulley (228) and the roller support (232) by means of the fitted belt or chain (226) on casing for gear (212) guided by the one or more guide rollers (216), (218), and (220) in between the one or more guide rails (222) and (224).

11. The assembly as claimed in claim 1, wherein distance between the set of rail plates (102) is equal to distance between the set of spindles (242).

12. A method (900) for reducing doffing time for one or more set of bobbins on a ring spinning machine, the method (900) comprising: accommodating, at a set of rail plates (102) positioned at predetermined distance & arranged on both sides along length of the ring spinning machine from a first spindle out of a set of spindles (242) of one end to the last spindle out of the set of spindles (242) of other end, one or more ring spinning gripper bobbin holders (104) positioned at a pre-determined variable distance and set of rail plates (102) configured to move to and fro from a first pre-determined position to a second pre-determined position, and move laterally to facilitate angular movement, wherein the first pre determined position is the top most position pertaining to movement of a first set of bobbins (202) from the one or more set of the bobbins, wherein the inner end of rail plate from the set of rail plates (102) includes one or more ring spinning gripper bobbin holders (104) and outer end of rail plate includes the first set of bobbins (202), wherein set of rail plates (102) are parallel; lowering, the set of rail plates (102) from a first pre-determined position to a second pre-determined position, wherein the outer end of rail plate is at outer side of the ring spinning machine, and wherein the second pre-determined position facilitates gripping of a second set of bobbins (204) from the one or more set of bobbins; lifting, the set of rail plates (102) above the set of spindles top, wherein lateral movement of the set of rail plates (102) facilitate angular movement of the first set of bobbins (202) to the second set of bobbins (204) and from the second set of bobbins (204) to the first set of bobbins (202), and wherein lowering the set of rail plates (102) facilitate the first set of bobbins sitting on the set of spindles (242) and releasing the first set of bobbins (202), moving the set of rail plates (102) upward to the first predetermined position with the second set of bobbins (204) on the outer end of rail plate and the one or more gripper bobbin holders (104) on the inner end of rail plate & performing conveyer facilitates taking second set of bobbins (204) for unloading and bringing the first set of bobbins (202) at specified position, and facilitates lateral movement.

13. The method (900) as claimed in claim 12, wherein the first set of bobbins (202) include set of empty bobbins, and wherein the second set of bobbins (204) include set of full bobbins.

14. The method (900) as claimed in claim 12, wherein the one or more ring spinning gripper bobbin holders (104) are positioned at a pre-determined variable distance by means of a cam (802), a camroll (804), and a spring (806).

15. The method (900) as claimed in claim 12, wherein angular moment of set of rail plates (102) directs the cam roll (804) to rotate on cam (802) surface and allowing an inner holder of the set of rail plates (102) and outer holder of the set of rail plates (102) to come closer and move apart in inner slot of the set of rail plates (102) and outer slot of the set of rail plates (102).