DE7345620U - DISHWASHER - Google Patents

Description

Dishwasher

The invention relates to a winding machine consisting of a traversing device, a contact roller as a measuring and / or drive roller, which is connected to the circumference of the sleeve to be wound or coil is to be brought into frictional contact, as well as a rotatable and lockable coil turret on which at least two sleeve chucks are rotatably mounted, which are alternately brought into frictional contact with the contact roller and into the reel change or rest position will.

Winding machines with reel turrets are z. B. from J) b - PS k6 and DT-OS 2 110 367 known. Such winding machines with bobbin turrets are used for lossless bobbin changes; ie the full bobbin should be compared to an empty tube with the shortest possible changes and thus a low or as little loss as possible during production

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^ ^e s bobbin change must be replaced. This problem arises in particular with spinning, spin-drawing and other machines in which synthetic threads occur at high, constant speeds, so that with only short winding journeys (time to produce a finished, ie full bobbin), a frequent bobbin change (replacement of the finished bobbin against an empty core) is necessary without production being interrupted in the meantime.

There are at least two chucks on the so-called reel turret rotatably mounted. The bobbin turret is connected to a drive motor (turret drive) and can be rotated by this. on the other hand the reel turret can be locked in predetermined positions by a locking device. The positions are predetermined in such a way that one of the chucks with the sleeve clamped on them comes into the area of action of the contact roller. Suitable ones Chuck are z. B. in DT - OS 2 106 493 described.

The contact roller is first with the core during the winding cycle and then in frictional contact with the spool forming thereon. The contact roller is used in particular to keep the Peripheral speed of the bobbin growing in diameter · The peripheral speed is essentially the geometric one Sum of the constant thread speed and the mean traversing speed. The contact roller can be connected to a synchronous motor as a drive motor. In this case the The contact roller as the drive roller for the peripheral drive of the bobbin and the chucks are freely rotatable in the bobbin turret. It is also possible for the reel turret to have axle drive motors for each chuck. In this case, the contact roller serves as a measuring roller for measuring the circumferential speed of the bobbin

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or the bobbin thickness and is connected to a control device for adapting the bobbin rotation to the growing bobbin diameter (cf. DT-PS 1 115 815). Winding machines are also known which, although they have an axle drive motor for the bobbin, but which still have a drive roller driven at constant speed, whose drive torque is during the winding process is kept approximately constant (DT - PS 1 26?? 80).

Between the chuck in operation and the With the contact roller, a relative movement perpendicular to the axes is possible, be it by moving the contact roller away, be it by moving the bobbin turret, or by pivoting the bobbin turret away.

A lossless bobbin change with such winding machines is only possible if the tube (empty tube) to be brought onto the winding cycle has already been brought to a circumferential speed essentially corresponding to the thread speed before the thread is placed on the empty tube. For this purpose, an auxiliary drive is provided according to DT-OS 2 110 367, which acts on the chuck with the empty tube while this chuck is still in the rest position. According to DL - PS k6 651, the empty tube is brought into frictional contact with the drive roller by turning the bobbin turret, while the almost full bobbin on the winding journey is still in contact with the drive roller. Only when the thread is placed on the empty tube is it separated from the full bobbin and the bobbin turret rotated so far that the empty tube is in the operating position and the full bobbin is in the rest position, where it is braked, removed and replaced with a new empty tube is exchanged. This provides an inexpensive and effective way of changing the bobbin without losses. This"

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known device, however, has the disadvantage that the contact roller must have a very large diameter, if not the The possibility of a lossless bobbin change of the winding machine should be very limited. Because if the thread breaks with the high and a constant thread speed, a new bobbin change must be carried out, even if the tube located on the winding cycle only has a few layers of thread or even only the thread reserve or the waste winding is wound. In this case, the contact roller can only be in frictional contact with the crashed, almost empty case and the new one on the reel »" journey to the empty tube to be sent when the contact roller has a sufficient diameter «The diameter the drive roller must be so large that the simultaneous application of two empty tubes does not cause any unbearable pressure forces due to the torque to be applied when the empty tube is started. However, this large diameter of the contact roller has significant disadvantages because it is when pivoting the Bobbin turret with a full bobbin is very in the way and requires a large construction of the winding machine.

The object of this invention is to avoid these disadvantages and in particular to create a winding machine with a bobbin turret, in which there is no geometric dependence between the diameter d «sr Driving roller on the one hand and the distance between the core chucks to be operated one after the other and the winding diameter on the other consists.

For this purpose, a winding machine of the type described above is proposed, which is characterized by an additional contact roller, which is independent of the first contact roller as a drive or measuring roller is equipped and in the thread direction in front of the first

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Contact roller and with reference to the reel turret and to the first contact roller is arranged such that at the same time a chuck with tensioned thereon, at least almost unwound sleeve in frictional contact with the first Konatktwalze and the subsequent chuck with the empty tube clamped on it is to be brought into frictional contact with the second contact roller.

The advantage of this winding machine is that both contact rollers have a very small diameter and can be arranged relative to one another in such a way that a very small construction is made possible. Another advantage for the operation of such a winding machine, especially in chemical fiber spinning plants, consists in the fact that when changing bobbins for the full and empty bobbins, different peripheral speeds are arbitrary due to different speeds or target speeds of the contact rollers are adjustable. As a result, the thread tension of the thread on the empty tube can be independent of the thread tension of the thread on the full bobbin and thus also the particularly important hardness of the first · winding layers can be set as desired. During the winding cycle, i.e. when the bobbin turret is in its operating position and thereby the sleeve or coil sent on the winding cycle is no longer in frictional engagement with the second but in frictional engagement with the first contact roller, the independently adjustable speed of the Contact roller are advantageously used to promote or brake the thread touching them and thereby reduce the thread tension of the to influence the thread running up on the bobbin. In particular when automating the bobbin change, it is advantageous that also with only small diameter of the contact rollers the distance between the chuck axes can be chosen so large that there is no risk of there is mutual contact between the bobbin on the winding cycle and the finished bobbin. This avoids that the operator is under time pressure when removing the full bobbin.

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In a further embodiment of the invention, an enlarged ring cooperating with one end of the chuck or the empty tube to be clamped onto it is used for the second contact roller Suggested diameter. This ring makes it possible to move the thread between the second contact roller and the one on it without any damage adjacent empty tube and while maintaining the oscillating back and forth movement of the not yet completely full Feed coil.

Instead, it is still possible to equip one end of the chuck with such a ring, which cooperates with the second contact roller. For the same purpose, it is alternatively proposed to use the second contact roller with endless ones known per se To provide thread guide grooves. This once guarantees that the thread run unhindered to the not yet full bobbin even when the empty tube is in contact with the second contact roller and at the same time can be relocated to and fro. On the other hand, this solution offers the advantage that the traversing is as close as possible to the bobbin surface and thus ensures an exact bobbin structure will. This design also allows the second contact roller not only to be independent of the first contact roller set higher or lower but also to a periodically changing speed as soon as the bobbin turret is in its Operating position is rotated, and thereby the tube or bobbin sent on the winding cycle has lost the frictional engagement with the second contact roller and is in frictional engagement with the first contact roller. There is accordingly in this embodiment of the invention the possibility of thread tension and additionally the thread tension during the winding cycle by leading or trailing the second contact roller To influence the laying angle of the bath on the spool by periodically changing the target speed of the contact roller Mirror formation during the prone part of the winding cycle

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avoid changing the bobbin without loss, while doing so To use the traversing device, i.e. the second contact roller designed as a grooved drum, for a short time to synchronize the high circumferential speed of the empty tube, and also for the empty tube and the full bobbin while the thread is being applied setting different circumferential speeds. The invention also provides the possibility of setting the nominal circumferential speeds of the first and second contact rollers Desire to synchronize or bring to a certain ratio. A corresponding setting of the Setpoints are used, e.g. by switching the frequency from the synchronous motor to. A geared connection can also be used for this purpose certain transmission ratio between the two contact rollers be provided, which is produced by a switchable clutch. The transmission connection is preferably established by an overrunning clutch, which is achieved by reducing the set speed or drive power of the faster contact roller can be put into operation. The advantage is that with this design all Thread tension increments in the period of change of the now on the winding journey sent bobbin from one contact roller to another can be avoided.

Details of the invention and its advantages are given below described with reference to the drawing of a preferred embodiment.

Show it:

Fig. 1: the perspective view of a winding machine,

Fig. 2: the side view of the winding machine, 3a shows the schematic representation of individual to operating phases of the winding machine,

c:

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Fig. ^ A, b embodiments of the second

Fig? ^d 5a, b ^: contact roller,

Fig. 6: the thread guide bracket as a detail,

Fig. 7: the cable cylinder with the incorporated Thread guide track for moving the auxiliary thread guide as a partial longitudinal section,

Fig. 8: the thread guide for forming the thread reserve, in longitudinal section,

9: the view of the winding machine (partially open) with drive devices.

The winding machine according to FIG. 1 consists of a machine housing 1 connected to the machine frame, not shown, and a slide 2 which can be moved in guides 3 in the vertical direction. The carriage 2 carries the traversing thread guide k, which is guided in the straight-line guide 5 and driven by the reversing thread roller 6 shown in FIGS. 2 and 3, as well as a first contact roller 7 and a second contact roller 8. As FIG. 9 shows, the first contact roller is 7 driven by the synchronous motor 9 and the second contact roller 8 driven by the asynchronous motor 10. The inverted screw shaft 6 and the second contact roller 8 are connected to one another by a toothed belt 11.

The winding machine has a bobbin turret 12. Two chucks 13 and 14 are rotatably mounted on it. The reel turret is rotated further by the turret drive actuator 15 shown schematically in FIG. 3 by means of bevel gears 16, 17. A locking device 18 is also provided, by means of which the revolver can be locked in two predetermined operating positions 19 'and 19 ".

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The chucks 13 and 14 are arranged on chuck shafts and for clamping winding carriers such as suitable ones Empty tubes determined. Suitable sleeve chucks are known from DT-OS 2 106 493, for example.

In a preferred embodiment of the winding machine, the second contact roller δ is provided with a thread guide groove 20. Since the spiral thread shaft 6 and the second contact roller 8 are driven at synchronous peripheral speed, the is used Traversing thread guide 4 for guiding the thread into the thread guide groove 20. The reversing thread roller 6 is in this way on the second contact roller δ matched that the traversing thread guide 4 safely guides the thread into the thread guide groove with sufficient lead. The Fadenführumgsnut 20 takes over the actual laying of the thread on the bobbin. Details about the design of the Thread guide groove result advantageously from DT-OS 2 OW 479 and 2 345 896. Others, with regard to the Traversing properties less favorable, but otherwise equivalent embodiments of the second contact roller result from the Figures 4 and 5 In Figures 4a and 4b, the second contact roller 8, the rings 21, which run on the empty tube 22 of the chuck 13 and 14, respectively. As soon as a few layers of thread are on the empty tube 22 are wound, the filling coil 23 comes into contact with the contact roller δ, so that the rings 21 do not function devices. In Fig. 5, the chuck has a ring 24 which is initially in contact with the contact roller δ until a few layers of thread are wound on the empty tube and the filling bobbin 23 comes into contact with the contact roller. The ring then ceases to function. In all cases, the one specified according to this invention is used Execution of the second contact roller for the purpose that the thread can still be traversed properly until the empty tube, which rests on the second contact roller δ when threading, (as described later) is accelerated to the circumferential speed of the second contact roller and the thread then from the full bobbin can be deflected onto the empty tube.

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Before going into further details of the winding machine, its operating phases should first be described with reference to FIGS. 2 and 3. In Fig. 2 there is a? full bobbin 23 on the first contact roller 7 and an empty tube 30.2 on the second contact roller δ. In this operating phase, the chuck 13 with the empty tube 30.2 is accelerated to the circumferential speed of the second contact roller 8. At this point in time, the full bobbin 23 is still being charged with the resulting thread. In this operating phase, the thread guide grooves 20 (Fig. 1) or the formation of the contact roller with beads (Fig. K) or the formation of the chuck with a WuIsc (Fig. 5) ensure that the thread is still freely between the empty tube and the second contact roller - and can be moved here and thereby the further build-up of the bobbin 23 is not hindered.

As soon as the empty tube 30.2 has reached the circumferential speed of the second contact roller 8, the later to be described Fedenumlegexnrichtungen put into operation and the thread applied to the empty tube 3Ο.2 and thereby separated from the full bobbin 23. As shown in Fig. 3a, the sleeve 30.2 now fills with the Bobbin 22 with the bobbin turret 12 rotating a little in the direction of the arrow. In this operating phase, the turret drive 15 is not in operation, so that the turret under the contact forces of the contact rollers 7 " and the growing bobbin diameter of the bobbins 23 and then 22 (Fig.3b) is freely rotatable.

After the operating phase, which is shown in FIGS. 2 and 3a and which only lasts for a short time, the turret drive motor is put into operation and the reel turret is rotated further. As shown in FIG. 3b, the bobbin 22 located on the winding cycle can - depending on the distance and diameter of the two contact rollers - come into brief and simultaneous contact with the two contact rollers 7, 8. The bobbin turret is rotated further until it is locked in the operating position 19 ¹ shown in FIG. 3c by the locking device 18. Now she is on the winding journey,

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located coil 22 in contact with the first contact roller 7 » while the full bobbin 23 can be withdrawn and replaced by a new empty tube.

As can be seen from FIGS. 2, 3a, 3b, 3c, the slide 2 guides during the rotary movement of the bobbin turret 12 and during the winding cycle, a movement in the vertical direction. There are for Up and down movement, the pneumatic support devices 26 are provided, which are acted upon by compressed air in such a way that they Compensate the weight of the slide completely or partially and, if necessary, an additional contact pressure between the contact rollers and the adjacent ones Generate sleeves or coils.

The following description of the thread laying devices relates in particular to FIGS. 1 and 2. The thread turning device is switched on by a time relay 27 * which is put into operation when the bobbin turret 12 is pivoted into the position shown in FIG. The time relay 27 is set so that by its switching pulse the empty tube 3 ° · 2 has reached the required peripheral speed of the second contact roller δ, as experience has shown. Due to the switching pulse of the timing relay and voltage / pressure converter 28 and pneumatic cylinder 41, the thread guide bracket 40.1 pivots from the starting position (solid lines) into the traversing plane between the reciprocating traversing thread guide and the second contact roller 7 and beyond into the end position, for example according to FIG dashed line of the thread guide bracket, which is designated in this position with 40.2. He lifts the thread ~ $ k out of the traversing thread guide 4. The pivoting movement is achieved by acting on the pneumatic cylinder 41, the piston rod 42 of which is fastened to the thread guide bracket by means of the joint 43. The stroke of the piston rod 42 defines the end position 40.2 and the starting position 40.1 of the thread guide bracket * The stroke is dimensioned so that the thread guide bracket is sunk in its starting position behind the traversing plane in the carriage 2 of the winding head

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is arranged. As soon as the thread J> h is lifted out of the traversing thread guide 4, it is automatically pulled to the center of the traversing stroke due to the prevailing thread tension and slides due to the inclined position of the thread guide bracket with respect to the second contact roller 8 on an inclined plane to the cranked part 44.2 of the thread guide bracket at the end of the traversing stroke. The inclined plane is spanned between the part 45.2 of the thread guide bracket 40.2, which is inclined relative to the winding axis, and the thread guide 46 which is stationary on the machine frame. During the sliding movement along the thread guide bracket 40.2 to the cranked part 44.2, the thread is still supported by the thread guide groove 20 of the second contact roller 8.

An auxiliary thread guide acts with the swiveled-out thread guide bracket 40.2 47 x 1 together, that shown in its in full lines The starting position is taken over by the incoming thread as soon as the thread guide bracket is pressurized with compressed air of the cylinder 4i is brought back into its starting position 40.1. The corresponding thread course is denoted by 34.1 in the drawing and shown in dash-dotted lines. The auxiliary thread guide 47.1 is attached to the piston 48 shown in more detail in FIG a cable cylinder 49 is guided. He moves along one Guide track 50, which is incorporated into the wall of the cable cylinder is. The piston 48 is connected to ropes 51 and 52, which over Deflection rollers 53 and 54 are guided and on the piston 55 of the double acting pneumatic cylinder 56 are attached. Controlled by the Acting on the pneumatic cylinder 56 with compressed air via dis Line 57.1 now becomes the auxiliary thread guide 47.1 along the guideway 50 postponed. Here he pulls the thread 34.1 over a, Wire brackets protruding into the thread path and bent approximately in a Z-shape 58 and bilo> t a loop in the strand of thread, which as it moves on of the auxiliary thread guide 47.1 along the guide track 50 is opened. That of the auxiliary thread guide 47.1 of the almost finished bobbin

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supplied thread section slides on the inclined Legs of the wire bracket 58 down until the one shown in dashed lines Position of the thread 3 * +. 3 is reached, while the thread section 3 ^ · 2 running from the stationary thread guide 46 to the auxiliary thread guide 47 · 2 by the intended rotary movement of the auxiliary thread guide ^ - as a result of the Course of the guideway 50 in the cable cylinder 49 - in contact is brought with the thread catching means 59 on the empty tube 30.2. The incoming thread 3 ^ * 2 is thereby forcibly caught on the empty tube, and the thread section between the thread catching means 59 and the auxiliary thread guide 47.2 (dashed end position) is brought into the cutting area of the severing knife 60. The severing knives 60 are Prismatic bodies distributed around the circumference of each chuck shaft, the edges of which are parallel to the axis of the chuck and are designed as cutting edges 61 are. The thread now clamped on the thread catching means 59 and still wound on by the finished bobbin 23 thereby receives a increased thread tension and is cut by the cutting knife 60. Of the Auxiliary thread guide is then moved back to its starting position 47.1 by applying compressed air to line 57.2, where it is up to the following bobbin change persists.

In the meantime, the thread 3 ^ 2 caught on the empty tube 30.2 and running up on it tries to move back to the center of the traversing stroke due to the prevailing thread tension. But at this he will prevented by the fixed thread guide 62, which is mounted on the carriage 2 of the winding head, and which the thread running plane between the stationary thread guide 46 and the empty tube 30.2 penetrates. The thread guide element 62 is shown in more detail in FIG. A pin 63 is provided on this thread guide which is deflected laterally under an adjustable spring force. To adjust the spring 64 is used an Allen screw 65 inserted into the tubular thread guide element 62 » While overcoming the resistance through the laterally indented With a delayed movement of the thread, the pen becomes the center of the traverse stroke the thread reserve laid. The thread then becomes the traversing

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Hubmitte pulled, where it is detected by the traversing thread guide k in order to now be properly laid to a cheese. The described thread guide 62 with the pretensioned pin 63 to form the thread reserve on the empty sleeve is preferably used for winding technical threads, especially carpet thread, since higher thread forces can be applied to move the pin 63 - against the spring force - than with textiles Threads of a lower titer is possible.

The design of individual units described in the example Details of the winding machine are in no way binding or to be construed as limiting the subject matter of the invention. Rather, can these are replaced by suitable means corresponding to the intended function.

Fig. 9 is used to describe the drive of the invention Dishwasher. The first contact roller 7 is driven by the synchronous motor 9 and toothed belt 72 at a constant speed. the Second contact roller δ is driven by motor 10, which can be designed as a synchronous motor or as an asynchronous motor, and by toothed belt 71. The reciprocating thread shaft and the traversing thread guide, which are shown in Fig. 1, are shown in Fig. 9 for better Overview omitted. In this connection it should be pointed out that if the second contact roller 8 is equipped with thread guide grooves, there is no absolute necessity for prearrangement There is reciprocating thread shaft and traversing thread guide.

A coupling 73 is attached to the shaft of the second contact roller 8, the outer ring fk of which is connected to the drive shaft of the first contact roller 7 by gills 76. 9 shows the operating phase in which the winding turret 12 is swiveled just that far

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is that the newly sent on the winding cycle bobbin 22 just rests against the first and the second contact roller at the same time. In particular at this moment it has been found to be expedient that the first and the second contact roller are operated at the same peripheral speed. It should be noted here that - as stated - the second contact roller 8 can be operated at a higher or lower peripheral speed than the first contact roller 7. In this way, the thread tension can be favorably influenced. The second contact roller 8 advantageously has a certain lead in relation to the first contact roller 7. However, the opposite operating case is also conceivable. To produce the same peripheral speed, the speed of the drive motor is reduced and the clutch 73 is switched on. In a preferred embodiment, the clutch 73 is an overrunning clutch which automatically comes into operation when the drive speed of the motor 10 is reduced and provides the second contact roller 8 via the belt 76 with a minimum speed matched to the speed of the first contact roller 7. The usual types of overrunning clutches can be used (see e.g. Kollmann: Contribution to the construction and calculation of overrunning clutches in "Construction" 1957 p. 25 * »ff * Bostiber & Kingston: Free wheeling clutches in" Machine Design "24 (1952) No. h pp. 189 - 194; each with further references). It should be noted that the direction of action of the overrunning clutch depends on which of the two contact rollers is operated with lead or lag. In any case, the contact roller should be connected to the synchronous motor and operated at a constant speed even during the changeover phase.

The bobbin turret 12 is after the end of the thread change (see. Fig. 2 and the associated description) by the switch 93 put into operation. At the same time, the speed of the motor 10 or the motor 10 is reduced by switch 93 and magnetic switch 9 ^ Completely switched off and switchable by magnetic switch 95 Clutch 73 switched on. The second is now driven Contact roller 8 by synchronous motor 9 »so that the peripheral speed

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potencies of the two contact rollers 7, 8 match. If the clutch 73 is not designed as a switchable clutch but as an overrunning clutch, magnet switch 95 is omitted. The entrainment of the contact roller 8 when the motor 10 is switched off Motor 9 takes place automatically in this case.

2 shows another device which prevents the bobbin turret 12 from rotating further under the weight of the full bobbin 23. This facility is used in conjunction with the present Invention needed in particular because the force of the empty tube resulting from the force of gravity in the full bobbin essentially coincides with the direction of movement of the carriage 2. In the present case, the reel turret 12 carries a Cam, which is designed as a roller 81 rotatable about the pivot point 80. The roller 81 acts in the rotational position of the bobbin turret 12, in which the empty tube 30.2 on the second contact roller 8 and the full bobbin 23 on the first contact roller 7 at the same time, with a curve 83 which is attached to a pivot lever 82 pivotable about the pivot point 84. The pivot lever 82 is connected to an energy storage device 86 in the joint 85. The energy store 86 can consist of a spring. In the present case, the energy store 86 consists of a piston rod 87, piston 88 and cylinder 89. The cylinder-piston unit can be subjected to different, adjustable pressures. The cylinder 89 is about pivot point 90 pivotable. The pressurized air is applied with the force of the arrow 91 in such a way that the curve 83 against the roller 81 is pressed. If the bobbin turret continues to rotate in the direction of arrow 92, the pivot lever 82 exerts an increasing braking effect on the bobbin turret via curve 83 and roller 8 1. As a result, the growing weight of the almost full iipule becomes whole or partially compensated. The course of curve 83 determines the course of the compensation of the bobbin weight. The energy storage device 86 exerted force (ε.arrow 91) or in the present case that in the Cylinder piston unit (88.89) existing pressure determines the height the compensation of the spool weight.

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It can be seen that the arrangement of cam 81 and cam can also be reversed in the sense that the pivot lever including energy storage device 86 is located on the reel turret 12 and the cam 81 is located on the machine frame. as well it can be seen that curve 83 does not necessarily represent the relative movement to execute cam 81! Sat, but just as well the relative movement can be performed by the cam 81. Finally, it can also be seen that the relative movement is not must be a pivoting movement but can also run in a straight line.

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Claims (2)

-18- - aT η s ρ r U c h 1. Winding machine consisting of a traversing device, a contact roller as a measuring and / or drive roller, Which is to be brought into frictional contact with the circumference of the tube or spool to be wound, as well as a rotatable reel turret on which at least two sleeve chucks are rotatably mounted, which are alternately brought into frictional contact with the contact roller and into the bobbin change or rest position, characterized by one with independent heating and / or drive devices. (10,11) connected second contact roller (8), which in the direction of rotation (92) of the reel turret (12) in front of the first contact roller (7) and with reference to the reel turret (12) and to the first contact roller (7) in this way is arranged that at the same time a chuck (14) with on it stretched, at least almost unwound empty tube (3Ο.2) in frictional contact with the first contact roller (7) and the subsequent chuck (13) with the The empty tube (30.2) clamped thereon is to be brought into frictional contact with the second contact roller (8). 2. winding machine according to claim 1, characterized in that the second contact roller (8) has one or more rings (21) with an enlarged Has a diameter in the area of the ends of the empty tube (3Ο.2) clamped on the chuck. -19- 7345620 29.0176 f
• · -19- 3 winder according to claim 1, characterized in that each chuck (13,1 * 0 has contact rings (24) with enlarged diameter in its end regions, and that the second contact roller (8) extends axially into the region of these contact rings (2h) . k. Winding machine according to claim 1, characterized in that the second contact roller (8) is designed as a known grooved roller with endless thread guide grooves (20). κ winding machine according to one or more of the preceding claims, characterized in that the contact rollers by a mechanical gear (76) and a switchable clutch (73) are connected to one another. 6 * winding machine according to one or more of the preceding claims, characterized in that the contact rollers by a mechanical gear (76) and a Overrunning clutch (73) are connected, which overrunning clutch is in operation by reducing the set speed or drive power of the faster contact roller is settable. 7345620 01/29/76 Jf