GB2201168A

GB2201168A - Supplying tubes to textile servicing units

Info

Publication number: GB2201168A
Application number: GB08800595A
Authority: GB
Inventors: Bohuslav Jirka; Karel Kaulich
Original assignee: Elitex Zavody Textilniho; Elitex Koncern Textilniho Strojirenstvi
Current assignee: Elitex Zavody Textilniho; Elitex Koncern Textilniho Strojirenstvi
Priority date: 1987-01-15
Filing date: 1988-01-12
Publication date: 1988-08-24
Anticipated expiration: 2008-01-12
Also published as: CH676861A5; CS27187A1; DE3800186A1; GB2201168B; CS261150B1; GB8800595D0; IT8819094A0; IT1215720B

Description

Supplying Servicing Units with Empty Tubes [email protected] in Pen-end

Spinninq Machines - -A ------ ------------ 2222Lii2tion The present invention relates to supplying servicing units with empty tubes, particularly in open end spinning machines.

The full wound yarn bobbins in textile machines, particularly in open end spinning machines, or winding machines, must be changed for empty tubes upon attaining the required bobbin size, or wound yarn Length. This change is performed either manually or by means of special devices, which must have prepared an empty tube, at the moment of performing the change.

A plurality of methods for conveying tubes to the separate-working places are known. So e.g. the automatic mechanism for performing the changing operation carries a certain supply of tu_bes therewith, this being disadvantageous because of the Limited number of tubes conveyed in such manner and the necessity of either manual or automatic replenishment, when the whole device is inoperative. Further., chain conveyors are known, which are provided with followers carrying the tubes along a row of working units, and deposit- ing them into the magazines Located above the separate working units. The tubes can be also conveyed through a channel and displaced along the machine by pressure at the end of the row of tubes. Furthermore, a solution is known which, by means of a reversible tie rod the followers mounted thereon, advances a row -of tubes about spacings, which are in accordance with those of the working units. The disadvantage of those devices is the considerable intricacy of both the control and operating mechanisms and Lhe failure rate usually following from the high number of repeated components, of which they consist. A considerable disadvantage is aLso the dust fouling of both the operating components and the tubes, which wipe down the impurities u0on advancing about the contact surfaces of the conduit. The impurities settLed on the tubes and covered by the initiaL part of the winding are a source of difficuLties for the further processing of yarns.

The purpose of the present invention consists in mitigating the above disadvantages and in securing a simpLe and reLiabLe method of and device for suppLying the servicing units with empty tubes.

According to one aspect of the present invention there s provided a method of suppLying servicing units with empty tubes, particuLarLy in open end spinning machines, by intermediary of a conveying beLt, passing paraLLeLy with the traveL of the servicing unit, which is provided with handLing arms for the tubes, wherein al Least one tube is adjusted on the servicing unit by means of the handLing arms in an interme,diate position between the point of further passing of the tube for winding and the conveying beLt for the tubes and., upon the signat for performing doffing, the tube is passed, from the intermediate position, for winding and, simuLtaneousLy, the conveying beLt is brought into movement with a further tube for its positioning to the positionaL stop of the servicing unit, from which the tube is transferred fo the intermediate position, whereupon the conveying belt is stopped.

According to another aspect of the present invention there is provided a device for performing the above method comprising a positionaL stop fastened device for performing the method as in the method above, comprising a positionaL stop fastened on the servicing unit above the conveying beLt and provided with a contact sensor of the presence of tube.and a sensor for indicating the tube in the intermediate position, the Latter being connected to the circuit of the driving mechanism of the conveying beLt.

The effects of the method of conveying the tube and the device for performing that method are important particuLarLy in that onLy one tube is conveyed during the time, at which the changirrg process of t he bobbin for a -tube is performed by the servicing unit at an arbitrary working unit, the conveyed tube forming a suppLy for the further foLLowing exchange..

The device is very simpLe, without repeated mechanicaL_ components, of which the cycLic function with Long time dweLLs within the environment of textiLe machine operation with high dust iness forms the source of frequent defects. The device makes PossibLe the acceptance of the tube from the tonveying beLt even inthe course of advance of the servicing unit aLong the working units,and secures to a maximum extent the cLeanLiness and the clustfree condition of the tube surface. A further substantiaL advantage of that method of conveying tubes is the independence of the spacing of the working units.

An embodiment of the invention wiLL now be described by way of exampLe, with reference to the accompanying drawings in which:

Fi-g. 1 is a side eLevation of an open-end spinning machine with a servicing unit.

FIg. 2 is a pictoriaL view of a tube at a positionaL stop and on a conveying beLt.

Fig. 3 is a diagrammatic view showing the transfer of the tube.

Fig. 4 is a pictoriaL view of a conicaL tube having its narrower end at the positionaL stop and on the conveying beLt; and Fig. 5 is a pictoriaL view of conicaL tube having its under end at the positional stop and on the conveying beLt.

Fig. 1 shows a conveying beLt 1 on the side of a textiLe machine, eg an open end spinning machine 2 with the cliagrammaticaL representation of a servicing unit 3 for exchanging bobbins for tubes and a positionaL stop 4 for determining the position of a tube 5 before its taking-over by handLing arms 6. The tube 5 is deposited from a verticat PuLL-out device 7 on the running conveying beLt 1 and carried to the servicing unit 3 which is., according to the working unit to be attended, e.g. 8 or 9 at a cl ifferent distance from.the vertical pull-out device 7. In relation to this distance, even the time necessary for conveying tube 5 to the servicing unit 3 is different. The velocity of the conveying belt 1 must be chosen in such a manner that the time unit 9 from point 10 of depositing the tube on the conveying belt 1 is shorter than the time necessary for attendance of the given point. Due to the possibility of rem ving tube 5 from the conveying belt 1 even during travel of the servicing unit 3between the working units, the attendance time is the sum of the time necessary to perform the elemental operation at the attended unit and the time -necessary for the travel between the neighbouring working units.

A component of the servicing unit 3 is the positional stop 4, which is represented in Fig. 2. The tube 5 is stopped on the running conveying belt 1 by the positional stop 4, while being guided during irainsport and upon stopping in the position for being withdrawn from the beLt by means of two bilaterally arranged guides 11 and 12. The tube 5 is continuously forced by the running conveying belt 1 against the front part of the positional stop 4, and its position for being withdrawn from the belt is determined very precisely even during travel of the servicing unit 3 along the working units under thecondition, that the velocity of the conveying belt 1 is higher tha.n the veLocity of travel of the servicing unit3. A component of the positioning stop 4 i-s a sensor 13,, which secures the recording of tube 5 and emits a pulse for its withdrawal by the handling arms 6, which are r'epresented in Fig.3 The handling arms 6 are mounted pivotally on a pivot 14, and are provided with a mechanism (not represented),which secures their position in the intermediate position 15, in which the tube is recorded by sensor 16. In this position the said handling arms 6, between which is gripped tube 5 upon recording by sensor 16, act as a magazine with one tube for the further exchange of a bobbin for a tube on the foLLowing working unit.

In biLateraL, e.g. fine spinning machines, in the case of winding conicaL bobbins and conveying tubes for both sides from the end of the machine, the conicaL tube 17 can be conveyed by its Larger diameter in the forward or the backward direction, in the direction of the running conveying beLt 1. The Larger diameter of tube 17 is guided by guides.

11 and 12, the position of the smaLLer diameter can move between the guides within the Limit of cLearance. Therefore, it is necessary to secure, before thewithdrawaL of the conicaL tube 17 form the conveying beLt 1, its coaxiaLity with the axes of the hanclL ing arms.

In Fig. 4 a device is represented for the determination of the required position of the smaLLer diameter of the conicaL tube 17 in the case that said tube is conveyed to the positionaL stop 4 with its smaLLer diameter. The positionaL stop 4 is provided with a wedge-shaped clefLector 18, which clefLects the smaLLer diameter of tube 17 into the required p o s i t i o n.

In Fig. 5, a device is, represented for the determination of the required position of the smaLLer diameter of conicaL tube 17 in that case when said tube is conveyed towards the positionaL stop 4 with its Larger diameter. On the transfer device 6 an adjustabLe operating device (not represented) is arra.nged,which upon motion of the handLing arms 6 in the direction.towards the conveying beLt 1 impacts a controL pin 19 of a centering device 20, consisting of two arms 21 and 22 mounted pivotaLLy on pins 23 and 24 and interconnected by gears 25 and 26.

By pressure of the operating device against the controL pin 19 of the centering device 20, arms 21 and 22 approach each other and center tube 17. the opening of the arms is secured by spring 27 suspended on pin 28. The adjustabLe stop 29 determines the extreme position of the opening of arms 21 and 22.

k - 6 The principLe of the operation is as foLLows:

In the initiaL position, the handLing arms 6 of the servicing unit 3 are positioned in the intermediate position, in Fig. 3 and the tube 5 cLamped therebetween forms a suppLy for the further immediate operation of the mechanism At the moment of the signaL indicating performed doffing, emitted by the appurtenant spinning unit 9, the arms 6 are turned into the position III, and transfer the tube into a further mechanism for performing the exchange. SimuLtaneousLy, the conveying beLt 1 is brought into-motion which moves paraLLeL with the LongitudinaL axis of the machine 2 and theoperation of which continues the puLse of sensor 16, recording the presence of the tube in position II. The conveying beLt 1 moves at a higher veLocity than that of the servicing unit 3 aLong machine 2. At the same moment, the verticaL puLL-out device 7 is aLso started to operate, and pLaces a further tube on the conveying beLt 1. The tube is carried towards the servicing unit-3, where it is stopped by the positionaL stop 4 and recorded by sensor 13. This sensor transmits a puLse to the handLing arms 6, which are brought into motion untiL reaching postion I., in which they grip tube 5 from the conveying beLt 1 and turn therewith into the initiaL intermediate position II. At that - moment, the recording sensor 16 emits a puLse for the stoppage of the driving mechanism 30 of the conveying beLt 1.

Claims

A method of suppLying servicing units with empty tubes, particuLarLy in open end spinning-machines, by intermediary of a conveying beLt, passing paraLLeLy with the traveL of the servicing unit, which is provided with handLing arms for the tubes, wherein at Least one tube is adjusted on the servicing unit by means of the handLing arms in an intermedia.te position between the point of further passing of the tube for winding and the conveying beLt for the tubes and, upon the signaL for performing-doffing, the tube is passed, form the intermediate position, for winding and simuLtaneousLy, th-e-conveying beLt is brought into movement with a further tube for its positioning to the positionaL stop of the servicing unit, from which the tube is transferred to the intermediate position, whereupon the conveying beLt is stopped.
2. A method as cLaimed in CLaim 1, wherein the conveying beLt moves with a b- igher veLocity than'that of the traveL of the servicing unit in the same direction.
3.; A device for performing the method as cLaimed in CLaim 1, comprising a positionaL stop fastened on the servicing unit above the conveying beLt and provided with a contact sensor of the presence of tube and a sensor for indicating the tube in the intermediate position, the Latter being connected to the circuit of the driving mechansim of the conveying be Lt.
4. A method of suppLying servicing units with empty tubes, in an open end spinning machine, substantiaLLy as hereinbefore described with reference to the accompanying drawings.
5. A device for suppLying servicing units with empty tubes, in an open end spinning machine, substantiaLLy as hereinbefore described with reference--to the accomoanying drawings.

Published 1988 at The Patent Office, State House, 66[71 High Holborn, London WClR 4TP. Further copies may be obtained from The Patent Office, Sales Branch, St Mary Cray, Orpington, Kent BR5 3RD. Printed by Multiplex techniques ltd, St Mary Cray, Xent. Con. 1/87.