ARRANGEMENT WHEN WINDING YARN, STRIP-MATERIAL OR THE LIKE FROM A SUPPLY ROLL ONTO A BUNCH OF WIRES OR THE LIKE FED THROUGH THE CENTRE HOLE OF THE SUPPLY ROLL

Abstract: Arrangement when winding yarn (3) from a supply roll (2) by means of a flyer (4) onto a bunch of wires fed through the centre hole of the supply roll for automatically transferring to unwinding a new supply roll (2') when the yarn on the first supply roll (2) is used up or broken. According to the invention the new supply roll (2') is disposed downstream of the first supply roll (2) seen in the direction of feeding (a) of the bunch of wires and a second flyer (4') is associated with it. Downstream of the new supply roll (2') and the second flyer (4') there is according to the invention a holding device (13) to loosely hold the free end of the yarn (3') on the new supply roll (2') as long as the yarn (3) on the old supply roll (2) is not used up or broken. At its free end the yarn (3') on the new supply roll (2') is formed into a sliding knot (15) carried by the holding device (13), through which sliding knot the bunch of wires (1) is freely fed. To bring the second flyer (4) to rotate when the yarn (3) on the first supply roll (2) is either used up or broken there are means (6', 7', 8', 9', 10). According to the invention the holding device (13) is furtherore adapted to release the sliding knot (15) and to have it tightened around the bunch of wires (1) when the second flyer (4') starts to rotate and after that to release the free end (18) of the new yarn (3') as a consequence of the continued feeding of the bunch of wires (1).

Description: ARRANGEMENT WHEN WINDING YARN, * STRIP-MATERIAL OR THE LIKE FROM A SUPPLY ROLL ONTO A BUNCH OF WIRES OR THE LIKE FED THROUGH THE CENTRE HOLE OF THE SUPPLY ROLL. TECHNICAL FIELD The present invention relates to an arrangement when winding yarn, strip-material or the like from a supply roll onto a bunch of wires the like fed through the centre hole of the supply roll by means of flyer rotating around the bunch of wires for automatically starting winding the yarn, strip-material or the like from a new supply roll, when the yarn, the strip-material or the like on the first supply ro is either used up or broken, the new supply roll also being disposed in such a manner that the bunch of' wires is fed through the centre hole of the new supply roll. BACKGROUND ART To keep a bunch of wires together it is known within the cable techni to helically apply, either yarn or strip-material around the bunch of wires. For this purpose most often a so called flyer is used having a roll placed around the bunch of wires. The yarn is fastened through the flyer onto the bunch of wires and while the bunch of wires is pulled forward the flyer starts to rotate, whereby the yarn will be wound helically around the bunch of wires with a pitch determined by the rotary speed of the flyer and the linear feeding speed of the bun of wires. When the yarn' is used up on the roll the forward feeding of the bunch of wires as well as the. rotation of the flyer are stopped. This is most often done automatically. Then, the empty roll is removed from the flyer by an operator whereupon a new roll of yarn through which the bunch of wires has been threaded in advance, is placed in the flyer. After that, the free end of the yarn on the new roll is con- nected with the end of the yarn from the old roll, whereupon the feeding of the bunch of wires can start again and the flyer starts to rotate. Also in those cases when the yarn for some reason breaks, the feeding oM?r τi of the bunch of wires is stopped as well as the rotation of the flyer and the operator has to perform a splicing operation before the bunch of wires anew is fed forward and the flyer anew starts to rotate. DISCLOSURE OF THE INVENTION The purpose of the present invention is to bring about an arrangement that makes it possible to automatically start unwinding " the new suppl roll when the material on the old supply roll is either used up or broken. By this, it would be possible to increase the output considerably due to the fact that the installation could be left unmanned for example by night. This is achieved in that the arrangement mentioned by way of intro¬ duction has obtained the characterizing features indicated in the claims. BRIEF DESCRIPTION OF THE DRAWING The invention will be described more in detail below with reference t the accompanying drawing on which the single figure shows an embodi¬ ment of the arrangement according to the invention. PREFERRED EMBODIMENT The Figure shows an installation for winding yarn onto a bunch of wires 1 fed forward with a predetermined speed, which installation in a manner known per se comprises a roll of yarn 2, through the centre hole of which the bunch of wires 1 is fed forward and which, in a manner not shown, is journalled to rotate around the bunch of wires. To apply the yarn 3 from the roll 2 onto the bunch of wires 1 there is a so called yarn flyer 4, indicated by means of dashed and dotted lines and which through a driving belt 5 can be brought to rotate around the bunch of wires 1 and the yarn roll 2 by means of a driving motor 6. The yarn roll 2 will rotate due to the fact that the yarn 3 is unwound from the roll by means of the flyer 4. To obt a uniform unwinding of the yarn 3 from the roll 2 it is necessary, however, to slow the roll down in a manner not shown. When the yarn on the roll 2 is used up or broken, i.e. when the roll 2 stops to rotate, this will be sensed by means of a monitor 7 which in the sh embodiment exhibits an axis 8, driven by a belt 9 placed around a pulley (not shown), which in its turn is fixed to the rotation axis of the yarn roll 2. The monitor 7, for example, can be adapted to emit pulses, the pulse repetition frequency of which corresponds to the rotary speed of the roll 2, to a control device 10. Thus, when " the yarn on the roll 2 is used up or broken, i.e. the rotary speed of the roll 2 decreases, this is detected by the control device 10, which then stops the driving motor 6 whereby the flyer 4 is stopped as well. In those cases when the yarn is broken the operator perfor a splicing operation. If, on the other hand, the yarn on the roll 2 is used up, the operator removes the empty roll and places a new ro of yarn 11 inside the flyer 4 and ties the free end of the new roll together with the end of the yarn from the old roll. Before the win operation has started the new roll 11 has been placed, in a manner n shown, on a tubular element 12 through the centre hole of which the bunch of wires 1 is fed. The equipment described up to now is the one which normally is inclu in a yarn winding installation. In order to facilitate an automatic transfer to a new yarn roll without the assistance of an operator it is suggested according to the invention that the installation described above be completed wit at least one mainly identical installation located downstream of the first installation seen in the direction of feeding of the bunch of wires 1, indicated by means of an arrow a. The different elements in the completed installation, which elements are identical with the elements in the installation described above comprise a yarn roll V a flyer 4' indicated by means of dashed and dotted lines, which flye is driven by a driving belt 5' by means of a driving motor 6' and a monitor 7' the axis 8' of which is driven by a belt 9' placed around a pulley (not shown) which in its turn is connected to the rotation axis of the yarn roll 2'. The monitor 7* as well rotation axis of the yarn roll 2'. The monitor 7' as well as the monitor 7 are connected to the control device 10 to control the driving motor 6'. According to the invention a holding device 13 is associated with yarn roll 2' and the flyer 4'. The holding device 13 is tabular an through its centre hole the bunch of wires 1 is fed. The holding device 13 is provided downstream of the yarn roll 2' and the flyer seen in the direction of feeding of the bunch of wires 1. The hold device 13 comprises a first clamping means 14 for holding the free end of the yarn 3' on the roll 2'. The clamping means 14 in the em bodiment shown is made up of two springbiassed clamping plates whi can be clamped together by means of a screw. At its free end the yarn 3* on the roll 2' is formed into a sliding knot 15 which is carried by a tapered part 16 of the holding device 13, facing the roll 2' and through which the bunch of wires is freely fed. To kee the sliding knot 15 on the tapered part 16 there are other clampin means 17 which in the embodiment shown consist of two plate spring only one of which being shown in the figure, as the other one is l ted on the opposite side of the tapered part 16. During normal operation i.e. as long as the yarn on the roll 2 is used up or broken the flyer 4' does not rotate and consequently th sliding knot 15 is maintained in the position shown in the figure. However, when the yarn on the roll 2 is used up or breaks, the con device 10 is adapted to automatically initiate the following proce without the need of an operator: The fact that the yarn 3 on the roll 2 is used up or broken is dete fay the control device 10 in that the axis of the monitor 7 stops t rotate as a consequence of that the roll 2 stops rotating. Then, th control device 10 disconnects the driving motor 6 for the flyer 4 a connects the driving motor 6' for the flyer 4'. Then, the flyer 4' starts to rotate and unwind the yarn 3' from the roll 2'. The plate springs 17 are adapted to hold the sliding knot 15 so tight that it not pulled down onto the bunch of wires 1 until the flyer 4' starts rotate. The sliding knot 15 is then tightened around the bunch of w 1 as a consequence of the continued rotation of the flyer 4' and th yarn 3' is helically wound around the bunch of wires 1 as a consequ of its continued feeding in the direction a. When the sliding knot 15 is fed into the centre hole of the holding device 13 the free end of the yarn 3* is released from the clamping means 14, whereupon the winding of the yarn around the bunch of wires 1 completely has been taken over by the flyer 4*. " The end of the yarn 3 w ll, thus, be woun between the bunch of wires 1 and the yarn 3* from the new roll 2'. By means of the equipment just described a transfer to a new yarn rol can be made automatically as soon as the yarn on the original roll is used up or broken. In this manner the production can continue without - the need of an operator to change rolls or to carry out a splicing operation. It is obvious that the installation, when so needed, can be completed with more than one installation. These installations, in their turn, must then be arranged downstream of each other seen in the direction of feeding of the bunch of wires 1.

Claims: WHAT WE CLAIM IS: 1 An arrangement when winding yarn, strip-material or the like from a supply roll (2) onto a bunch of wires <1) or the like fed throu the centre hole of the supply roll by means of a flyer (4) rotating around the bunch of wires (1) and the supply roll (2) for automaticall starting winding the yarn, the strip-material or the like from a new supply roll (2') when the yarn, the strip-material or the like on the first supply roll (2) is either used up or broken, the new supply roll (2*) being disposed in such a manner that the bunch of wires (1) is fe through the centre hole of the new supply roll (2'), characterized in that the new supply roll (2') is disposed downstream of the first supp roll (2) seen in the direction of feeding (a) of the bunch of wires, a second flyer (4') being associated with that new supply roll t2*) said second flyer (4*) being journalled to rotate around the bunch of wires (1) for winding the yarn (3'), the strip-material or the like from the new supply roll (2') onto the bunch of wires (1), a holding device (13) also being associated with said new supply roll (2*) said holding device (13) being disposed downstream of the new supply roll (2*) and the second flyer. (4*) to loosely hold the free end (18) of the new yarn (3'), strip-material or the like which at its free end is formed into a sliding knot (15) through which the bunch of wires (1 is freely fed, and that there are means (6*, 7*, 10) to bring the second flyer (4') to rotate as a consequence of that the yarn (3), the strip-material or the like on the first supply roll (2) is either used up or broken, the sliding knot being adapted to be tightened around th bunch of wires (1) when the second flyer (4') starts to rotate and the holding device (13) being adapted to release the free end (18) of the new yarn (3'), strip-material or the like as a consequence of the con¬ tinued feeding of the bunch of wires (1). 2 Arrangement according to claim 1, characterized in that the holding device (13) comprises a first clamping means (17) for holding the sliding knot (15) and a second clamping means (14) for holding the free end of the new yarn (3'), strip-material or the like.

Inventors: NORTENIUS BENGT ARNE
Applicants: ERICSSON TELEFON AB L M, NORTENIUS BENGT ARNE
Application year: 1982
Main classification: B65H81
IPC codes: B65H67, B65H81, H01B13