EP3829791B1 - Reversing coiler and method for operating it - Google Patents

Description

The invention relates to a method for operating a turning reel according to the preamble of patent claim 1. The invention also relates to a corresponding turning reel as a device, according to the preamble of claim 7.

Such turning reels are generally known in the prior art, e.g. B. from the Japanese patent application JP 64-5625 . The turning coiler disclosed there has a rotor on which at least one coiler mandrel is mounted with its rotor-side end eccentric to the axis of rotation of the rotor. The turning reel is used to wind up strip, in particular metal strip, on one of its reel mandrels. At the beginning of a winding process, the rotor of the coiler mandrel is first rotated in such a way that a coiler mandrel that is still empty is positioned in a winding position. In this position, the strip is first wound onto the coiler mandrel. After initial winding has taken place, ie after approximately 1 to 3 windings of the strip have been wound onto the coiler mandrel, a tensile stress (tape tension) is built up in the strip for further winding. During further winding, the coiler mandrel is rotated from said initial winding position into a finish winding position. There, the strip is finished being wound into a coil or bundle. After completion, the coil can then be removed from the finished winding position and transported further. Because the turning reel typically has two reel mandrels, both of which are fastened to the rotor of the turning reel eccentrically opposite to the axis of rotation of the rotor, the two reel mandrels can be pivoted alternately between the initial winding and final winding positions. Extremely short fret sequences can thus be realized. From said Japanese document it is also known to assign a traveling mandrel support bearing to the free end of the coiler mandrel, which is coupled to the free end of the coiler mandrel in the winding position and during the transfer of the coiler mandrel from the winding position to the Ready winding position remains coupled to this free end. In this respect, the term "moving mandrel support bearing" explains itself, it drives along during the transfer.

The coiler mandrel typically already has a very high dead weight. For this reason, its free end sags or sags by typically 1 to 2 mm in relation to its end on the rotor side, even if it is not wound with a metal strip. This one-sided deformation increases under load due to belt tension and increasing waistband weight.

This sagging or hanging down of the free end is disadvantageous in that it reduces the permissible load on the coiler mandrel and also the winding accuracy of the strip onto the coiler mandrel. When winding coils, so-called "bagging" often occurs; i.e. H. the individual windings of the coil are offset to one another like an accordion. Finally, with the free end of the coiler mandrel hanging down, a strip pull to stabilize the winding can only be applied relatively late, i. H. after a few windings of the tape, are built up slowly, which also leads to inaccuracies when winding the tape. Due to the above-mentioned winding inaccuracies, a not inconsiderable part of the metal strip wound into a coil is traditionally to be declared as scrap. The course of the sliver and the associated "bag formation" have further effects on the flatness measurement and control at the beginning of the sliver.

The moving mandrel support bearing known from said Japanese patent application does not appear to be suitable for remedying these known disadvantages because it does not primarily support the free end of the coiler mandrel against gravity, but obviously primarily against the strip tension. For the person skilled in the art, this is evident from the fact that the two-piece bearing head of the accompanying mandrel support bearing does not grip and stabilize the coiler mandrel in a vertical direction, but primarily in a horizontal direction.

The international patent application WO2018/041673 A1 discloses all features of the preambles of independent claims 1 and 7.

The invention is based on the object of further developing a known method for operating a turning reel and a known turning reel in such a way that the bending or hanging down of the free end of the reel mandrel is avoided, particularly at the beginning of the winding process. In terms of process technology, this object is achieved by the process claimed in claim 1 . This is characterized in that the free end of the coiler mandrel in the winding-on position is raised against gravity to the height of its end on the rotor side with the aid of the detachably coupled, traveling mandrel support bearing.

Due to the claimed raising of the free end of the coiler mandrel, its lowering or hanging down is compensated and all the disadvantages mentioned above are avoided. In concrete terms, this can prevent the formation of bags when the metal strip is being wound up. Furthermore, the rapid build-up of strip tension that is possible as a result ensures that the individual windings of the strip of the coil lie tightly one on top of the other. Due to the support of the free end of the mandrel, the tape tension in the winding position can take on higher values compared to an unsupported end of the mandrel.

According to a first exemplary embodiment of the method according to the invention, it is advantageous if the free end of the coiler mandrel is already raised in the winding-on position before and/or during the winding-on of the strip. If the free end is already lifted before the beginning of the winding of the tape, the formation of a bag can already be prevented when the tape is being wound on. The basic rule is: the earlier you lift, the better the winding result. The less waste is produced by the winding process.

Advantageously, the free end of the coiler mandrel is permanently held at the variable height of its rotor-side end with the help of the coupled mandrel support bearing during the transfer of the coiler mandrel from the initial winding position to a finish winding position - also taking into account the increasing coil weight. As a result, a flush winding of the strip with closely adjacent turns is ensured even during the continued winding process during the transfer of the coiler mandrel.

Claims 1 to 4 discussed so far are aimed solely at compensating for the weight force; therefore, according to these process steps, initially only the lowering of the free end of the coiler mandrel is counteracted due to the weight; this is also expressed by the wording that the free end of the coiler mandrel is raised "to the level" of its end on the rotor side.

In addition to the weight, the coiler mandrel and in particular its free end are also subject to at least one force component in the horizontal direction due to said strip tension to which the strip is subjected during winding. As a result, the free end of the coiler mandrel is basically also bent in the horizontal direction. Such a bending in the horizontal direction is also undesirable because it also leads to said errors when the strip is wound onto the coiler mandrel.

Therefore, the present invention advantageously provides that the free end of the coiler mandrel is already in the initial winding position and also during the transfer of the coiler mandrel from the initial winding position to the final winding position - also taking into account the strip tension that is increasing and changing in direction and magnitude With the help of the accompanying mandrel support bearing, it is also permanently opposite to its end on the rotor side is held. This expression "opposite its rotor-side end" means that the free end of the coiler mandrel is not only level with the rotor-side end, but also that the coiler mandrel is not bent in the horizontal plane. According to the invention, this is ensured in that the moving mandrel support bearing is designed not only to counteract gravity and to correct the height of the free end of the coiler mandrel, but also to counteract strip tension.

A calculation unit is provided for the synchronization of the movement and the calculation of the specific support position and support force of the accompanying mandrel support bearing. From the variable parameters of weight, strip tension, current position of the mandrel and turning process, this continuously calculates the support position corresponding to the current position of the free end of the coiler mandrel, which is to be assumed by the traveling mandrel support bearing. A resultant force and thus a changing amount for the offset of the free end of the coiler mandrel to the fixed end of the coiler mandrel is determined from the variable load parameters of weight and strip tension. This ensures that the movement carried out by the adjustment device is carried out both synchronously with the position of the mandrel during a turning process and that the changing load parameters are taken into account and the free end of the coiler mandrel is thus always raised to the height of its end on the rotor side. The synchronization can take place through electrical and/or mechanical components/parts.

Advantageously, the coiler mandrel is additionally supported with a stationary mandrel support bearing in the finish winding position with the coil typically wound thereon. Only after the stationary mandrel support bearing has unfolded its supporting effect can the moving mandrel support bearing be uncoupled and moved back into the winding position. The coil can be finished in the finished winding position - supported by the stationary mandrel support bearing will. The finished coil can then be transported away, typically with a coil transport vehicle.

The above-mentioned object is achieved in terms of device technology by the turning reel claimed in claim 7 . This is characterized in that the moving mandrel support bearing is supported on the floor, preferably a factory building, and that the adjusting device is designed to lift the bearing head together with the coupled free end of the coiler mandrel against gravity until the free end of the coiler mandrel is at the same height from the rotor-side end of the coiler mandrel when the coiler mandrel is in the winding position.

Further advantageous configurations of the method according to the invention and of the turning reel according to the invention are the subject matter of the dependent claims.

Figur 1

den erfindungsgemäßen Wendehaspel in einer Anwickelposition;

Figur 2

den erfindungsgemäßen Wendehaspel in einer Fertigwickelposition;

Figur 3

den Lagerkopf an dem freien Ende des mitfahrenden Dornstützlagers;

Figuren

den Haspeldorn und das zugeordnete mitfahrende Dornstützlager

4.1 - 4.7

in schematisierter Darstellung in verschiedenen Stadien des Wickelprozesses;

Figur 5

die Veränderung der auf das mitfahrend Dornstützlager wirkenden Kräfte in unterschiedlichen Stadien bei der Überführung des Haspeldorns von der Arbeitsposition in die Fertigwickelposition; und

Figur 6

verschiedene Varianten zur Anbringung von Antrieben in den Gelenken des Doppel-Parallel-Kurbelbetriebes.

The description is accompanied by six figures, where

figure 1

the turning reel according to the invention in a winding position;

figure 2

the turning reel according to the invention in a finish winding position;

figure 3

the bearing head at the free end of the traveling mandrel support bearing;

characters

the coiler mandrel and the associated accompanying mandrel support bearing

4.1 - 4.7

in a schematic representation in different stages of the winding process;

figure 5

the variation of the forces acting on the traveling mandrel support bearing at different stages in the transfer of the coiler mandrel from the operative position to the finish winding position; and

figure 6

different variants for mounting drives in the joints of the double-parallel crank operation.

The invention is described in detail below with reference to the figures mentioned in the form of exemplary embodiments. The same technical elements are denoted by the same reference symbols in all figures.

figure 1 shows the turning coiler 100 according to the invention. It consists essentially of a rotor 110, ie here by way of example a rotating disk on which two coiler mandrels 112 are mounted here with their rotor-side end eccentric to the axis of rotation D of the rotor. The two coiler mandrels 112 extend generally perpendicular to the plane of the rotor. Each of the two coiler mandrels is used to wind up strip 200, in particular metal strip, into a coil. The one on the left figure 1 The reel mandrel 112 shown is in the so-called initial winding position A, while at the same time the second reel mandrel 112 is in the so-called finish winding position F. The functioning of the turning reel and the method according to the invention are described further below.

According to figure 1 an accompanying mandrel support bearing 120 is assigned to the coiler mandrel 112 in the working position A. This mandrel support bearing 120 has a bearing head 122 which is detachably coupled to the free end of the coiler mandrel 112 . The free end of the coiler mandrel is that which lies opposite the rotor-side end of the coiler mandrel with which it is mounted on the rotor 110 .

The moving mandrel support bearing 120 is parked and supported on the floor 300 of, for example, a workshop or on a foundation. In particular, it has an adjusting device 124, for example in the form of a double-parallel crank mechanism for moving the bearing head 122 of the support bearing on a path predetermined by the design of the adjusting device. in particular a circular path. This orbit is in figure 1 marked with an arrow pointing to the right; On this circular path, the left coiler mandrel can be moved from the initial winding position A by rotating the rotor 110 about its axis of rotation D and simultaneously moving the mandrel support bearing through a suitable movement of the adjustment device 124 into the finished winding position F.

This situation is in figure 2 shown. It can also be seen there that the coiler mandrel 112 in the final winding position F of FIG. In this finish winding position F, the stationary mandrel support bearing not only has to support the coiler mandrel, but also the finished coil. where is in figure 2 It will be appreciated that the stationary mandrel support bearing 130 is positioned and configured to engage the coiler mandrel for supporting the free end of the coiler mandrel 112 further inward than the bearing head 122 of the traveling mandrel support bearing. "Further in" in this case means "closer to the rotor 110" but still at the free end of the mandrel. This arrangement and positioning of the stationary mandrel support bearing 130 with respect to the traveling mandrel support bearing 120 is important to permit decoupling of the bearing head 122 from the free end of the coiler mandrel 112 in the finish winding position. Due to the fact that the stationary mandrel support bearing 130 attaches further inwards to the free end of the coiler mandrel 112, the area in front of the bearing head 122 is free so that it can be easily released for uncoupling the moving mandrel support bearing without problematic interfering edges.

figure 3 shows an exemplary embodiment for the bearing head 122 of the traveling mandrel support bearing 120. It can be seen that this bearing head 122 is sleeve-shaped at its end facing the coiler mandrel 112. A sliding sleeve 128 is mounted in or on this sleeve-shaped end so that it can be displaced axially in the direction of the double arrow. To couple the bearing head 122 to the free end 113 of the coiler mandrel 112, the sliding sleeve is on the overhanging End 113a of the free end of the coiler mandrel pushed and in this position with an actuating element 129, z. B. a cylinder locked. The actuating element 129 also serves, if necessary, to pull back the sliding sleeve and thus to release the free end of the coiler mandrel from the bearing head 122 or from the mandrel support bearing that travels with it. in the in figure 3 shown coupling position, the free end 113 of the coiler mandrel 112 is rotatably mounted within the sliding sleeve 128 or within the sleeve-shaped end of the bearing head 122. At the same time, however, the design of the sleeve-shaped end ensures that the free end 113 of the coiler mandrel rests on each point of the above with reference to figure 1 mentioned trajectory can be supported against the force of gravity G by the moving mandrel support bearing.

The method according to the invention for operating the turning reel 100 according to the invention just described is described below with reference to FIG Figures 4 to 6 explained in more detail.

The method initially provides that the rotor 110 of the turning coiler 100 is rotated in order to move the initially empty coiler mandrel 112 into the winding position A; please refer figure 1 . In the winding position A, the bearing head 122 of the moving mandrel support bearing 120 is detachably coupled to the free end of the coiler mandrel 112 . This state is also in Figure 4.2 illustrated.

However, the problem underlying the method according to the invention is Figure 4.1 shown. The end face of the coiler mandrel 112 in the winding position A can be seen in a schematic representation. The small dot-dash circle shows that rotor-side end of the coiler mandrel that is permanently mounted on the rotor 110, while the small circle drawn with a solid line shows the free end of the coiler mandrel. The offset shown in an exaggerated representation between the two small circles means that the free end of the coiler mandrel 112 hangs down or is lowered in relation to its 1 to 3 mm, for example, due to the high weight of the coiler mandrel 112 alone. This sagging of the free end of the coiler mandrel leads to improperly wound coils, as described in the introduction.

According to the method according to the invention, this sagging of the free end 113 of the coiler mandrel 112 is counteracted in that this free end 113 is raised against gravity G to the level of the rotor-side end of the coiler mandrel 112 with the aid of the coupled mandrel support bearing that travels along.

Figure 4.2 shows the free end 113 of the mandrel 112 in the raised position; this can be seen from the fact that in Figure 4.2 the rotor side and the free end of the coiler mandrel 112 are drawn congruently.

In the winding-on position A, the tape is started to be wound onto the coiler mandrel 112 . This is initially done entirely without belt tension; the strip tension is only built up when the strip, in particular the metal strip, has been wound up on the coiler mandrel 112 with a few windings (usually 1-5 windings) and can withstand an acting tensile stress or an acting strip tension.

The free end 113 of the coiler mandrel 112 in the winding-on position A is preferably already raised to the level of the end on the rotor side before and/or during the winding-on of the strip. If possible, the free end of the coiler mandrel should already be raised to the level of the end on the rotor side before the beginning of the winding, because then the problems described in the introduction when winding the strip can be avoided right from the start of the winding.

Figure 4.3 shows the structure of the tape still in the winding position A; the structure of the strip tension is indicated there parallel to the strip 200 by the two arrows pointing towards one another. In the Figures 4.2 and 4.3 the double parallel crank mechanism 124 of the traveling mandrel support bearing holds its bearing head and thus also the free end 113 of the coiler mandrel 112 in the winding position at the level of the end on the rotor side.

Figure 4.4 shows the reel mandrel 112 with the strip 200 partially wound under strip tension during its transfer from the initial winding position A to the finish winding position. Here too, according to the method according to the invention, the adjusting device 124, here by way of example in the form of the double-crank mechanism, always keeps the free end 113 of the coiler mandrel 112 level with the end of the coiler mandrel on the rotor side. At the same time, the adjustment device 124 also counteracts the strip tension at the free end of the coiler mandrel, so that no lateral offset occurs between the two ends of the coiler mandrel 112 either. Rather, it is ensured in particular by the adjusting device 124 that the free end of the coiler mandrel is always held opposite the end of the coiler mandrel on the rotor side. In this way it is ensured that the strip 200 is wound cleanly into the coil and the disadvantages described in the introduction do not arise.

Figure 4.5 shows the coiler mandrel 112 with the coil diameter, which has meanwhile increased, in the finish winding position F. The adjusting device 124 is suitably rotated accordingly.

Figure 4.6 shows the coiler mandrel 112 in the finish winding position F, where the free end 113 of the coiler mandrel 112 is now also supported by the static or stationary mandrel support bearing 130 . In this finish winding position, the stationary mandrel support bearing 130 alone supports the free end of the coiler mandrel, so that the moving mandrel support bearing is uncoupled from the free end, for example by pulling back the sliding sleeve 128 can be. The uncoupled moving mandrel support bearing can then be moved back into the winding position, as in Figure 4.7 shown. The coil can be fully wound and later removed from the coiler mandrel without interfering with the accompanying mandrel support bearing.

figure 5 shows again the already from the Figures 4.1 - 4.7 known different stations of the coiler mandrel during its transfer from the initial winding position A to the final winding position F. Particularly clear are in figure 5 which also already in the Figures 4.1 - 4.7 indicated acting forces to recognize. The total force acting on the coiler mandrel 112 or the resulting force F _RES results in each case as a vectorial sum of the weight force F _G and the tensile force Fz due to the strip tension. It can be seen that the weight force F _G , which always acts in the vertical direction, is still relatively small in the initial winding position A and increases towards the finished winding position. This can be explained by the fact that in the winding-on position A at the free end, only part of the dead weight of the coiler mandrel 112 has to be supported and lifted by the accompanying mandrel support bearing. During the transfer to the finish winding position, more and more strip 200 is simultaneously wound onto the coiler mandrel, as a result of which the weight F _G increases steadily until, in the finish coiling position, it is made up of the weight of the coil and part of the dead weight of the coiler mandrel. Furthermore, in figure 5 to recognize that the tensile force Fz from the initial winding position A to the final winding position F increases in terms of amount and, in particular, also changes in terms of its direction. In the case of vectorial summation with the said weight force F _G , the result is in figure 5 shown different total forces F _RES . The accompanying mandrel support bearing 120 according to the invention must be designed in particular to counteract the said resulting total forces F _RES . For this purpose, according to the invention, the traveling mandrel support bearing 120 is supported on the ground in order to dissipate the forces into the ground.

The total forces and the current turning position are calculated by a calculation unit (not shown), which specifies the support position to be assumed by the moving mandrel support bearing and has it carried out by the adjusting device.

figure 6 shows again the already with reference to the Figures 4.1 - 4.7 partially described positions of the coiler mandrel during its transfer from the initial winding position to the final winding position. figure 6 shows in particular different possibilities for placing drives 126 in the pivot points of the double-crank mechanism 124. The drives are each symbolized by a sector-like division of the pivot points. In principle, it is sufficient to provide only one drive in one pivot point, as shown in the second column in figure 1 is shown as an example and alternative for two pivot points. Better, but also more expensive, is the installation of two drives 126 in different pivot points of the double-crank mechanism 124, as shown in the third column in figure 6 is shown. At the in figure 3 For the exemplary embodiment shown and the position of the coiler mandrel 112 shown there, a direction of rotation of the drives 126 in the same direction is recommended. Here the coiler mandrel 112 is still before dead center. The torques applied by the two drives 126 add up.

For the one in the fourth column in figure 6 shown embodiment is the coiler mandrel 112 beyond the dead center; the torques applied by the two drives 126 each act individually and in opposite directions of rotation.

The flexibility of the winding process is advantageously significantly increased by the method and the device according to the invention. The number of possible windings in the winding position and the permissible strip tension values in the winding position can be increased; the turning speed can be changed. This means that the winding process can be carried out much more flexibly in terms of process technology.

Reference List

100

turning reel

110

rotor

112

mandrel

113

free end of the coiler mandrel

113a

projecting end of the free end of the coiler mandrel

120

traveling mandrel support bearing

122

bearing head

124

adjusting device

126

drive

128

sliding sleeve

129

Actuating element for sliding sleeve

130

stationary mandrel support bearing

140

bundle transport car

200

Band, in particular metal band

300

floor

A

wrapping position

D

Axis of rotation of the rotor

f

finish winding position

G

gravity

Claims (13)

1. Method of operating a reversing coiler (100) with a rotor (110), at which at least one coiler mandrel (112) is mounted by its rotor-side end eccentrically with respect to the axis (D) of rotation of the rotor, for winding up strip (200), particularly metal strip, wherein the method comprises the following steps:

   rotating the rotor (110) for transferring the initially empty coiler mandrel (112) to a winding-on position (A); and

   releasable coupling of an accompanying mandrel support bearing (120) to the free end (113) of the coiler mandrel;

   characterised in that

   the free end (113) of the coiler mandrel (112) in the winding-on position (A) is lifted against gravitational force (G) to the height of its rotor-side end with the help of the coupled accompanying mandrel support bearing (120).
2. Method according to claim 1,
   characterised in that
   the strip (200) in the winding-on position (A) is wound up on the coiler mandrel (112); and the free end (113) of the coiler mandrel in the winding-on position (A) is lifted with the help of the coupled accompanying mandrel support bearing (120) already before and/or during winding-on of the strip.
3. Method according to one of the preceding claims,
   characterised in that

   the rotor (110) after winding-on of the strip (200) is rotated so as to transfer the coiler mandrel (112) from the winding-on position (A) to a finished winding position (F) for winding of the strip to finished state to form a coil;

   wherein the winding-on of the strip (200) under strip tension, preferably even increased strip tension, is continued during the transfer.
4. Method according to claim 3,
   characterised in that
   the free end (113) of the coiler mandrel (112) is permanently held at the variable height of its rotor-side end even during transfer of the coiler mandrel from the winding-on position (A) to the finished winding position (F) - including consideration of the then-increasing coil weight - with the help of the coupled accompanying mandrel support bearing (120).
5. Method according to claim 4,
   characterised in that
   the free end (113) of the coiler mandrel (112) is also permanently held oppositely to its rotor-side end already in the winding-on position (A) and during the transfer of the coiler mandrel from the winding-on position to the finished winding position (F) - including consideration of the strip tension then increasing and changing in its direction - with the help of the accompanying mandrel support bearing (120).
6. Method according to any one of the preceding claims,
   characterised by

   supporting the free end (113) of the coiler mandrel (112), which is wound with the coil, in the finished winding position (F) with the help of a stationary mandrel support bearing (130); uncoupling the accompanying mandrel support bearing (120);

   moving the accompanying mandrel support bearing into the winding-on position (A); winding the coil to finished state; and

   transporting the coil away.
7. Reversing coiler (100) with

   a rotor (110), at which at least one coiler mandrel (112) for winding up strip (200), particularly metal strip, is mounted by its rotor-side end eccentrically with respect to the axis (D) of rotation of the rotor;

   an accompanying mandrel support bearing (120), which is supported on the floor of a workshop, with a bearing head (122) for releasable coupling to the free end of the coiler mandrel and with an adjusting device (124) with at least one drive (126) for moving the bearing head (122) in correspondence with the variable position of the free end of the coiler mandrel during transfer of the coiler mandrel (112) from a winding-on position (A) to a finished winding position (F) by rotation of the rotor (110),

   characterised by

   a computation unit for synchronisation of the movement as well as computation of the actual support position and supporting force of the accompanying mandrel support bearing (120), wherein the support setting which corresponds with the current position of the free end of the coiler mandrel (112) and which is to be adopted by the accompanying mandrel support bearing (120) is continuously calculated from the variable parameters of weight force, strip tension, instantaneous position of the mandrel and the reversing process and thus it is at least ensured that when the coiler mandrel is in the winding-on position (A) the adjusting device (124) lifts the bearing head (122) together with the coupled free end of the coiler mandrel against gravitational force until the free end of the coiler mandrel (112) is at the height of the rotor-side end of the coiler mandrel.
8. Reversing coiler (100) according to claim 7,
   characterised in that
   the adjusting device (124) is constructed to lift the bearing head (122) together with the free end, which is coupled to the bearing head, of the coiler mandrel into the winding-on position (A) already before and/or during winding of the strip (200) onto the coiler mandrel (112).
9. Reversing coiler (100) according to claim 7 or 8,
   characterised in that
   the bearing head (122) is of sleeve-shaped construction with an axially displaceable sliding sleeve (128) as coupling element for coupling the bearing head to the free end of the coiler mandrel by pushing the sliding sleeve onto a projecting end (113a) of the free end (113) of the coiler mandrel.
10. Reversing coiler (100) according to claim 9,
    characterised by
    an actuating element (129) for manual or automatic sliding of the sliding sleeve (128) onto the free end (113) of the coiler mandrel and for withdrawing the sliding sleeve from the free end of the coiler mandrel.
11. Reversing coiler (100) according to any one of claims 7 to 10,
    characterised in that
    the adjusting device (124) is constructed in the form of a crank transmission, preferably as a double parallel crank.
12. Reversing coiler (100) according to claim 11,
    characterised in that
    a respective drive (126) is provided for each of at least two of the hinge points of the crank transmission.
13. Reversing coiler (100) according to any one of claims 7 to 11,
    characterised in that

    a stationary mandrel support bearing (130) is additionally provided for supporting the free end (113) of the coiler mandrel in the finished winding position (F); and

    the stationary mandrel support bearing (130) is positioned and constructed for supporting the free end of the coiler mandrel (112) further inwardly than the bearing head (122) of the accompanying mandrel support bearing (120).

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