IL44684A - Thread delivery device for textile machines - Google Patents

Description

fhroad delivery device for textile machines IRO 1 i Box 01 j i delivory for textile machines The invention relates to a thread delivery device for textile particularly knitting comprising a component which cooperates on the thread delivery system and can be rotated by means of a shaft on which at least two bolt pulleys are coaxially which pulleys are associated with two driving belts moving at different one of the pulleys always being connected to the shaft and the other pulley freely rotatably mounted on the In the case of a previously used thread delivery device of this type the shaft is supported in a stirrup by means of pivot bearings outside a thread drum entwined with The two pulleys are in turn mounted on the shaft by means of pivot bearings between the arms of the 3etween the two pulleys lies an axially Blidable coupling element with front toothing which is on the shaft and can be alternately engaged with the Therefore the pulley with which the coupling element engages is relative to the shaft while the other pulley is freely Each of the driving bolts can be driven at a desired speed since it is guided via a driving pulley whose effective is The thread drum can therefore selectively rotated at two speeds equal to the travelling speeds of the driving the production of fabric structures b means of a knitting machine requires different thread delivery speeds in tho various systems of the It is often the than two different thread delivery speeds are required at the same when For this purpose the driving shaft in another embodiment of the previously known thread delivory device is lengthened so that it projects freely upwardly out of the Another pulley is by means of a pivot bearing on the protruding of the Mounted above this other pulley is a second axially slidable coupling element with front toothing which can engage with this Also a driving belt which can be driven at a desired speed is associated with this other When three or more thread delivery of this type are provided on a three different thread delivery speeds may therefore be obtained this is usually still insufficient and moreover calls for a large number of components extra driving an additional driving pulley with variable soveral more sheave and consequently a large amount of space is is another known thread delivery device schrift 2 which is provided with three driving belts travelling at different Each thread delivery device is adjustably mounted on a guide rod transversely to the direction of travel of the driving The thread drum can be selectively ongaged with each of the a plurality of these thread delivery devices are arranged on a three different delivery speeds are also possible simultaneously as mentioned is often on the one and as in the case of the previously used delivery device described requires a large number of components and consequently a great amount of on the other this solution involves a groat deal of work in conversion or adaptation because the delivery devices have to adjusted and secured Tho underlying is to provide a thread delivery device of tho typo described at tho beginning of the specification which on account of the of components enables a arrangement to be the machine as well as almost any desired number of thread speeds to be provided in a simple This problem is solved in accordance with tho invention in that the first pulley is always connected to the shaft and serves only as a driving while other pulley is mounted on the shaft b moans of a pivot ball bearing and is therefore always a freely rotating in that the two pulleys can be freely axially removed from the shaft and interchangeably mounted thereon in that each delivery device is associated with a plurality of interchangeably driving pulleys of variable In the thread delivery device according to the invention shaft can be connected to either of the two driving belts by changing the positions of the This exchange may be very rapidly effected by hand since both pulleys can be freely removed from the preferably after loosening a and mounted thereon again in their changed In this case a special connecting is not Since the pulleys can be rapidly and effortlessly removed and a change of speed caused replacing one driving pulley with another having a larger or diameter does not present problem It in provided in an of the invention that the ball bearing of tho freely rotating pulley is mounted on a rigidly connected to tho driving In this removal and remounting of the pulleys is oven further simplified because the driving pulley and freely rotating pulley are to form a Such dri bolt can be d riven in a manner known per by means of a d riving whose ctive d iameter can be ad justed to vary the travelling speed of the bolt Generally speaking the great variations in speed between groups of systems on the machine and the systems or s of can be achieved by moans of the d riving belts travelling at greatly differing speeds while the necessary small variations in speed between the various within each or are made possible by the plurality of interchangeable driving pulleys of variable diameter To av oid confusion the d pulleys of variable diameter can each bo identified by a different i Practical embodiments of the invention are illustrated in the d rawings Fig l a diagrammatic plan v iew of the arrangement of delivery accord ing to the invention on a circular knitting machine is a side elevation of a s ingle thread delivery device according to the j Fig is a vertical partial se ction through tho belt pulle arrangement on a delivery device ing to the is a correspond ing to Fig through Fig is a side elevation of another individual thread delivery device according to the and is a plan view of the thread device shown in Fig The diagrammatic plan view in Fig l shows the d riving elements of a of delivery devices 1 which are arranged around the circurnferenco of a ring support above a conventional circular knitting having twelve systems As can bo seen in the each delivery device 1 comprises two pulleys each of which connected with one of two driving The belts are driven by driving wheels whose d can be adjusted in the known manner to obtain different travelling A of this special form used knitting articles with the In a certain brand and of knitting the thread speed is in this intended to be in system in system 64 min in system 147 again system The two driving belts always travel at different the first belt tho belt being used as a belt the second the belt as a In reference numeral 6 designates several sheave or return pulleys which enable belt tension to be adjusted and the loops to be formed around the driving wheels A single thread delivery device 1 is illustrated in It comprises a thread drum 7 rotatably mounted in a housing 8 which can be clamped by means of a clamping device 9 to the ring carrier of a knitting or textile The thread F runs off a storage spool and passes through a preliminary a disc brake 11 and a thread guide 12 so as to be wound tangential y on to tho thread drum 7 to form a thread supply A tilted thread feed plate 13 displaces the thread supply V axially along the drum thread is withdrawn over the top through a brake ring 14 and a pair of eyelets A motion 16 is the withdrawal eyelets During withdrawal the thread usually into contuct with the side of a hook 17 which restricts the withdrawal speed to being same the and therefore enforces a positive thread Tho thread drum 7 is supported on a shaft 18 which is rotatably mounted in the housing 8 and freely upwardly out of the Slidably fitted on to the protruding section of the shaft are two belt pulleys 19 and 20 which can bo freely removed at the to loosening a locking nut 21 screwed o to shaft Each of the pulleys is encircled by a belt 2 or in which case holes 2a and can be provided in the belts and pins 19a on one of the pulleys for better Details of the pulley arrangement are shown in It can be seen that the pulley which shown in without the pins 19a for the of is on the shaft therefore forms a driving pulley which transmits the driving power the 2 to the shaft The pulley 20 is mounted a ball bearing 22 which is in turn mounted on a bearing bush 3 rigidly connected to the shaft A spacer is shown at i that in the illustrated of components the drive of the shaft 18 and therefore of the thread drum 7 derived the driving belt 2 while the 3 only rotates the free pulley 20 about the shaft It is easily possible for the locking nut 21 to bo the two pulleys 19 and 20 removed from the top of the arrangement and interchangeably The driving pulley 19 is then enclosed by the driving belt 3 while the belt 2 is connected to the freely rotating pulley The adjustment of belt tension which necessary case is ensured by the pulley arrangement 6 In the latter case the shaft 18 and thread drum 7 are driven by 3 while the belt 2 causes the free pulley 20 to delivery device 1 is associated with a plurality of driving pulleys 19 of variable For in pulleys of a are indicated by numeral 19 while driving pulleys of a larger diameter which can be instead of the driving pulleys 19 are designated by numeral It can be seen through the or continuous circumferential lines of the freely rotating pulley that the pulley 20 can be either above or below the driving pulley 19 or as has been previously It can also be seen in that the driving speed in each system or group of can be different so that the machine can be advantageously adapted to suit a great variety of weaves or In special case the necessary great difference in speed the systems on the one and the on other is obtained by means of the drive of the belt 3 and the belt whereas the small difference in speed between the various systems B and E and and and is achieved by using the driving pulley of or pulley of larger diameter as the effective driving pulley on the thread delivery The illustration in is similar in many respects to that As the eame reference numerals are further description would be One different feature from is that a driving pulley 119 comprising a hub 119a which is integral therewith or rigidly connected the ball bearing 22 of the freely rotating pulley being mounted on this The spacer 119b can also be integral with the driving pulley This embodiment has the advantage that the two pulleys can be removed as unit from the top of the shaft The other thread delivery device of the which is shown in and particularly for the positive i delivery of elastic of the Lycra Reference numeral designates the housing of the thread delivery device which can be clamped to a ring carrier s of a knitting or other textile by of a clamping device 26 of the type as that clamping the delivery device shown in One end of a shaft of a roller 28 is rotatably in the housing and its other end in the retaining arm extending down from the The thread storage 30 13 slidably fitted on a cylinder The lower end of the arm 29 comprises two parallel passages through two guide rods which are connected to the lower end of the cylinder 31 transversely to the longitudinal direction can slide and enable the cylinder to move radially to i the The holder arm 29 and the cylinder 31 are also connected at their lower onds by means of a tension spring which constantly presses the thread storage against the roller i The shaft 27 of the 28 projects freely upwardly out of the housing On the protruding sectio of the shaft 27 there is i provided a arrangement 38 which is identical to that shown in or Just as in the previously each pulley can be driven by the central drive of the machine via a belt 40 a belt or a return pulleys and a driving wheel of variable The shaft 27 may be driven at a desired rotational speed by adjusting the driving by selecting from the high or drives the available interchangeable If the roller 28 the thread storage drum 30 also rotates constantly at the same speed whereupon the thread is delivered to the working place of the machine via a motion 4 at a desired delivery 3 peed which equal to the eed If the thread has been properly wound onto the storage which is a fundamental condition for this method of delivery to the same of thread per unit of time and therefore thread with always the expansion is constantly delivered to the which cannot be achieved with a conventional thread delivery device Elastic thread which is delivered in this manner is often combined with a thread delivered from a conventional storage spool by means of a conventional thread delivery device and they are fed together into the machine at where the machine comprises several systems In each of these systems the thread delivery device and the thread delivery device shown in and 6 are arranged in juxtaposition on the same ring carrier of the machine and driven by the same belt If the according to the invention interchangeable d riving pulleys has been described previously in connection with thread delivery devices for the positive delivery of thread to the working place on a the use of the invention is in no way limited to such devices the invention can in principle be used on any thread devices driven by belts or the irrespective of whether the devices are provided with a stationary or rotary thread or are intended for positive or intermittent thread i insufficientOCRQuality

Claims (12)

44684/2 'νΗΛΐ WE CLAIM 15:-

1. A thread feeder for textile machines, such as knitting machines, comprising a rotatable member which is adapted to be rotated by means of a drive shaft for winding and/or delivering thread, and at least two pulleys coaxially mounted or mountable on the drive shaft and engageable, . in use, with driving belts, so. that a first of the pulleys is non-rotatable relative to the drive shaft so as to act as a drive pulley and a second of the pulleys is. freely rotatable relative to the shaft so as to act as an idler pulley, wherein the drive and idler pulleys are axially removable from the shaft so as to be interchangeable in position one with another.

2. A thread feeder as claimed in claim 1, wherein the idler pulley comprises a ball bearing.

3. A thread feeder as claimed in claim 1 or claim 2, wherein the pulleys are separately removable from the shaft and mountable on the shaft in any order, whereby the drive pulley can be replaced by a pulley of different diameter.

4. A thread feeder as claimed in claim 1 or claim 2 wherein the pulleys are removable from the shaft together as a single unit which can be replaced inverted.

5. A thread feeder as claimed in claim 4 as dependent on claim 2, wherein the ball bearing of the idle pulley is mounted on a hub which is rigidly connected to the drive pulley. 44684/2

6. A thread feeder as claimed in any preccdir. claim wherein the pulleys are axially retained on the dr shaft by a detachable locking nut.

7. A thread feeder as claimed in claim 1 substantially as described herein with reference to Figures 2 and 3, or Figures 2 and 4, or Figures 5 and 6 of the accompanying' drawings.

8. A thread feeder kit comprising a thread .· feeder as claimed in any preceding claim together with at least one spare pulley or unit of two pulleys respectively interchangeable with the drive pulley or with both the drive and idler pulleys when they are removable as a unit of two pulleys and being of different diameter from the drive pulley or including a pulley of different diameter from the drive pulley and adapted to be non-ro tatably mounted on the drive shaft, respectively.

9. A thread feeder assembly comprising a mounting ring for fitment to a circular knitting machine and mounted or mountable thereon a plurality of thread feeders as claimed in any of claims 1 to 7, and a pair of main driving pulleys, one or both of which is of variable diameter, the first and second pulleys of the thread feeders lying. in two parallel planes each having an associated main driving pulley, the pulleys in each, respective plane being connected by a belt. 44684/2

10. A thread feeder assembly as claimed in Claim 9 substantially as described herein with reference to Figure 1, together with Figures 2 and 3 or 4, or Figures 5 and 6 of the accompanying drawings.

11. A thread feeder assembly as claimed in either of Claims 9 and 10 sold as a kit of parts with spare drive pulleys or pulley units of different diameter.

12. A circular knitting machine fitted with a thread feeder assembly as claimed in any of Claims 9 to 11,. For the Applicants PARTNERS