EP0534959B1 - Take-up device for doubling roll-type reel cutters - Google Patents

Abstract

A take-up device, in particular for doubling roll-type reel cutters, consists of two supporting arms or supporting frames (10) for supporting an empty roll (25), one clamping head (15) per supporting arm or supporting frame for holding each roll (25) centrally and rotatably, and at least one winding drive unit per take-up device (101; 102). The drive axis (45) of a drive motor (17) of the winding device unit is offset to the winding axis (46) of the roll (25). To improve the central drive for the winding shaft, the drive motor (17) is fastened to the supporting arm or supporting frame (10) with its drive axis (45) parallel to the take-up axis (46) of the roll (25) and has an output wheel (22); a belt (drive belt (23)), such as a flat, toothed, V-belt, cable or the like or a chain or the like as well as a drive wheel (13) connected in the drive direction to the clamping head (15) preferably on a single shaft (drive shaft (14)) are provided, and the belt or the chain (drive belt (23)) passes around the output wheel (22) (and the drive wheel (13)), so that the drive wheel (13) can be driven by the output wheel (22) in the direction of rotation; and the (drive-effective) diameter of the output wheel (22) is greater than at least a part of the active drive part (18) of the drive motor (17) and includes this drive part on at least part of its axial length.

Description

The invention relates to a winding device with the features specified in the preamble of claim 1.

Such winding devices are mainly used in slitter rewinder. While in reel cutting machines of the support roller type, in which the reel to be wound up rests on one or two rotating support rollers with their own weight, so that the own weight of the reel to be wound ensures that the slip-free torque transmission of the support roller (s) to the reel to be wound up If the required contact pressure is sufficient, it is necessary for roll cutting machines of the back-up roll type - regardless of whether only the back-up roll or the back-up roll and the winding tubes of the rolls to be wound are driven in the direction of rotation - to ensure a sufficient contact pressure between the roll to be wound up and the back-up roll. Two ways are known for this: either the support arms or the support frames are pivotally attached such that the pivoting movement of these support arms or support frames follows the change in diameter of the roll during the winding process; in this case, the support arms or support frames are pivoted by means of a hydraulic cylinder, the contact pressure being able to be applied to the support roller via the hydraulic cylinder. The other way of applying the contact pressure is to keep the support arms or support frames in the same position throughout the entire winding cycle and to mount the clamping heads for the winding cores of the rolls to be wound up on a slide each, which is located in one on the support arm or . the support attached to the guide roller to or away from it can move, and, z. B. via a lever arm and a hydraulic cylinder pivoting the lever arm to apply a force acting in the direction of the support roller (contact pressure).

The invention relates to both of the above options for letting the winding axis follow the change in diameter during the winding process.

While the generic rewinder can be used in many different machine types, there are particularly great advantages when used in roll-cutting machines of the backup roller type. In these roll cutting machines, the sleeves or rolls, on which the partial webs created by longitudinal division are wound, lie laterally on one or two support rollers arranged parallel to one another, preferably next to one another. Because of the space required in the axial direction of the support roller (s) for the support arms of the support rollers, the directly adjacent partial webs are wound on opposite sides with respect to the support roller (s). With such roll cutting machines, it is desirable to be able to wind rolls of the smallest possible web width if necessary. Therefore, if at least one of the sides of the support roller (s) has a plurality of winding devices, that is to say a plurality of partial web rolls are to be wound up, there is possibly very little space available for the support arms or support frames. This requirement can still be met in a relatively simple manner if the rotary drive for the winding-up operation is carried out by driving the support roller (s) and the drive torque is transmitted frictionally to the reel which is slightly pressed against the support roller. Conversely, such arrangements are more extensive, in which each clamping head has its own rotary drive, ie the torque acts in the center of the reel to be wound up (center winder). To also in In such cases, to achieve the smallest possible width of the support arms or support frames (seen in the direction of the support roller axis), either hydraulic motors or electric motors are attached in such a way that their drive axes are oriented at right angles to the winding axis. As a result, the overall length of the drive motors, as seen in the axial direction, can be relatively large, without the support arms or support frames becoming excessively wide. In particular, it has been proposed to use the motor housing of an electric motor as part of the support arm (DE-A-38 00 703 = EP-A-0 324 707)). This known arrangement thus accepts an angular gear between the motor axis and the winding shaft axis.

Proceeding from this, the object of the invention is to provide an improved center drive for the winding shaft for winding devices with the generic features mentioned at the outset, in particular for roll cutting machines of the backup roller type.

• der in Achsrichtung der Stützwalze gesehene Platzbedarf der Wickelantriebseinheit außerordentlich gering ist und
• gleichzeitig eine frei wählbare Unter- bzw. Übersetzung der Motordrehzahl auf den Spannkopf realisiert ist.

This object is achieved by a winding device with the features of claim 1. The invention achieves, inter alia, that

• the space requirement of the winding drive unit seen in the axial direction of the support roller is extremely small and
• at the same time a freely selectable step-down or step-up of the motor speed on the clamping head is realized.

The space requirement for the winding drive unit can be reduced particularly effectively by using a motor with the features of claim 2.

A particularly preferred further development of the invention is seen in the features of claim 3. It is known - and already described at the beginning - that the support arms or support frames hold their position during the winding process can and the clamping heads by means of guides on the support arms or support frames according to the change in roller diameter can be moved or slidably arranged, but it has so far not been possible to implement a center drive in these known arrangements because this leads to an unacceptably large width (in the direction of the support roller axis seen) of the winding device. In this type of support frames, which are also referred to as roll-up frames, it would also not have been possible to arrange the axis of the drive motor at right angles to the winding shaft axis, because this would have resulted in a disproportionately high amount of design effort because of the movability of the clamping head along a generally straight guide . This disadvantage is eliminated by the invention, so that winding devices with the aforementioned reel frames can now also be designed as real center winders. In particular, it is possible to essentially maintain the system dimensions in the known roll-up frames, so that, if necessary, there is even the possibility of retrofitting with the winding drive units according to the invention. In this embodiment, too, it is possible, as desired, to create the same conditions with regard to the length and the wrap angle of the belt according to the invention in each position of the tensioning head with regard to its guidance on the support arm / support frame. This is achieved particularly advantageously by the features of claim 4.

In order to control the travel or shifting movement of the carriage or carriage carrying the roll to be wound up during the winding-up process, and / or to generate or maintain a certain line pressure between the roll to be wound up and the support roller assigned to it during the winding-up process, the Arrangement proposed according to claim 5, which, however, can also be used very advantageously regardless of the winding drive unit according to the invention, and also regardless of whether a center winding is taking place or whether only the backup roller is driven.

For the purposes of the invention, “support arms” or “support frames” are understood to mean any type of support elements which are suitable for carrying the roll to be wound up during the winding process in such a way that the roll to be wound up is rotatable and, preferably, on the support roller assigned to it is present. Such support arms or support frames preferably have a possibility of subsequently placing the roll which has been wound up on the floor or on a means of transport. Such support arms or support frames are widely known in winding devices and therefore do not have to be explained in more detail.

For the purposes of the invention, “belt” and “chain” are understood to mean any elongated transmission means which can be deflected along its longitudinal direction in a, preferably single, direction and, if appropriate, the corresponding opposite direction (180 °) by appropriately shaped deflection means. Between the driven wheel and the drive wheel of the winding drive unit according to the invention, a transmission means transmitting the rotary movement is provided. If the drive wheel is not arranged on a movable or displaceable carriage or slide, the transmission means can also be a gear train, such as a gear transmission, under certain circumstances.

"Circumferentially arranged traction means" are effective transmission means for driving forces in the sense of the invention, which can be deflected around deflection means in such a way that they can attack the carriage or carriage in essentially opposite directions. The aforementioned transmission means such as belts or chains can also be used for this purpose, whereby - as with the transmission means - belts include flat, toothed, V-belts or similar belts as well as any type of ropes and comparable elements that can withstand tensile loads are.

The above-mentioned components to be used according to the invention are not subject to any special exceptional conditions in terms of their size, shape, choice of material and technical conception, so that selection criteria known in the respective field of application can be used without restriction.

Fig. 1

eine Aufwickelvorrichtung einer im übrigen nicht näher dargestellten Rollenschneidemaschine des Stützwalzentyps in Achsrichtung der Stützwalze gesehen und schematisiert dargestellt, wobei ein Tragschlitten für eine aufzuwickelnde Rolle in seinen beiden Extrempositionen wiedergegeben ist;

Fig. 2

dieselbe Aufwickelvorrichtung in der Rollenablegeposition (Entladestellung);

Fig. 3

dieselbe Aufwickelvorrichtung im Schnitt entlang der Linie A-A gemäß Fig. 1;

Fig. 4

eine alternative Ausführungsform einer Aufwickelvorrichtung, gesehen in Achsrichtung der Stützwalze (wie in Fig. 1), wobei sowohl die Wickelstellung (in durchgezogenen Linien) als auch die Ablegestellung (in strichdoppeltgestrichelten Linien) dargestellt ist;

Fig. 5

ein als erfindungsgemäßer Antriebsmotor geeigneter bekannter Drehstromaußenläufermotor im Axialschnitt.

Further details, features and advantages of the subject matter of the invention result from the following description of the accompanying drawing, in which - by way of example - preferred embodiments of winding devices according to the invention are shown. The drawing shows:

Fig. 1

a winding device of a roller cutting machine of the support roller type not shown in the rest seen in the axial direction of the support roller and shown schematically, wherein a carrier slide for a roll to be wound is shown in its two extreme positions;

Fig. 2

the same take-up device in the roll depositing position (unloading position);

Fig. 3

the same winding device in section along the line AA of FIG. 1;

Fig. 4

an alternative embodiment of a winding device, seen in the axial direction of the support roller (as in Fig. 1), wherein both the winding position (in solid lines) and the storage position (in dash-double-dashed lines) is shown;

Fig. 5

a known three-phase external rotor motor suitable as a drive motor according to the invention in axial section.

1 to 3 as a whole with the reference numeral 100 shows the one side of a single winding device 101 and a support roller 30. This support roller can be part of a roller cutting machine of the support roller type which is known per se and is not specifically shown in the drawing which unwinds a wide web of paper or the like from a wide roll in a unwinding station, in a cutting station the wide web is longitudinally divided into at least two narrower partial webs, in two arranged on each side of the support roller 30 or more, in particular two, support rollers and the narrower partial webs are wound up from at least one take-up device 101 each.

A so-called roll-up frame, known per se, on which a carriage 11 is slidably mounted in straight guides 12 serves as the support frame 10 of the winding device 101. The carriage 11 rotatably supports a drive wheel 13 which, for. B. formed as a V-belt pulley and on the roller 25 opposite side of the carriage 11 protrudes laterally from this. The drive shaft 14 is rotatably inserted through the carriage 11 and carries on the roll 25 facing side of the carriage 11 a clamping head 15 (see FIG. 3), which in the open end of a winding tube 16 for the roll 25 to be wound up in a manner known per se is frictionally or positively clamped.

The roll-up frame 10 also carries a drive motor 17, which is a three-phase external rotor motor according to FIG. 5 in all the exemplary embodiments shown. In this drive motor, the rotor, which represents a rotatable active drive part 18 of the drive motor, rotates around a stator 19 fixed to the support frame 10. In this exemplary embodiment, the outer diameter of the rotatable active drive part is - as large as the largest outer diameter of the entire engine. The rotor (drive part 18) carries holders on its outer circumference, e.g. B. a circumferential flange 20 to which an annular element 21 is fastened, which together with the drive part 18 forms a driven wheel 22 usable as a V-belt pulley. The driven wheel 22 of the drive motor 17 and the drive wheel 13 on the slide 11 lie in a common plane and are encircled by a rotating drive belt 23, which in this exemplary embodiment is designed as a V-belt, in the sense of a transmission. A tensioning wheel 26, which can be displaced with its axis on the support frame 10, ensures the necessary tightness of the drive belt 23. At the height of the two ends of the guide 12, deflection elements 27 and 28 are provided on the support frame 10 as rotatably mounted rollers, which are also designed as V-belt pulleys are and are also in one plane with the drive wheel and the driven wheel. In this way, the winding drive unit can work in any position of the carriage 11 along the guide 12. Further deflection elements 29 and 31 in the form of rollers or V-belt pulleys rotatably mounted on the carriage 11 allow the length of the drive belt 23 to be kept constant in every working position of the carriage 11, the angle of wrap of the drive belt 23 around the drive wheel 13 also remaining unchanged.

The function of the winding drive unit is now such that the winding process begins in the position of the carriage 11 shown in solid lines on the left in FIG. 1, in which the beginning of the partial web 24 to be wound up by looping and / or sticking or the like to the winding tube 16 is attached and the winding tube rests on the support roller 31. By driving the drive wheel 13 (direction arrow A), the partial web 24 is now wound up, with the roll 25 already wound increasing continuously in diameter, so that the carriage 11 is shifted to the right in accordance with the increase in diameter (in the drawing) until he has reached the dash-dashed end position in which the roller 25 has reached its desired end diameter. The carriage is displaced by means of deflection means 33 to 35 designed as rotatable rollers or gearwheels and a traction means 32 designed as a chain, which is arranged with one end above the guide 12 at an attachment point 38 of the carriage 11 and with its other end at one below the guide 12 Attachment point 39 of the carriage 11 engages the carriage 11 in the direction of pull. Due to the fastening points 38 and 39 located on both sides of the guide 12, the tilting moment exerted on the guide remains constant in both working directions. A drive motor 37 is provided for driving the traction means 32 and a tensioning wheel 36 for tensioning the chain. With this drive arrangement, not only can the carriage 11 be moved or shifted exactly, and in particular coordinated with the increase in the diameter of the roller 25, but it is also possible to generate the contact pressure of the roller 25 on the support roller 30 which is desired in the respective carriage position and maintain. the deflection means 33 to 35 are advantageously arranged coaxially to other shafts on the support frame 10.

In order to be able to move the entire support frame back and forth between the winding position shown in FIG. 1 and between the unloading position shown in FIG. 2, as is known per se, the entire support frame 10 is mounted so as to be pivotable about a pivot axis 40 and by means of a piston / Cylinder arrangement 41 can be pivoted between these two positions.

In the alternative embodiment according to FIG. 4, the position of the support arm or support frame 10 changes in accordance with the increase in the diameter of the roll 25 to be wound. For this purpose, the support arm or support frame 10 is in a manner known per se by means of a piston / cylinder arrangement 41 a Pivot axis 40 is pivotable, this pivot axis and this piston / cylinder arrangement also taking over the function of depositing the roller. In this case, the piston / cylinder arrangement can also take on the task of applying or maintaining the contact pressure which is possibly desired between the roller 25 and the support roller 30. Otherwise, the same reference numerals as in the exemplary embodiment according to FIGS. 1 to 3 have been used in the exemplary embodiment according to FIG. 4 for parts having the same effect.

Finally, in both exemplary embodiments, a carriage 42 is provided, from which the entire support frame together with the piston / cylinder arrangement 41 is carried and arranged to be movable along stationary guides 54 with respect to the floor 43 in the direction of the support roller axis in order to pull out the clamping heads 15 from the To enable winding sleeves 16 of the roll 25 (which is of course also possible in principle with a fixed carriage 42) and, on the other hand, to enable rolls of different widths to be wound. Finally, in the case of particularly narrow partial webs and several winding devices on each support roller side, each winding device as a whole can be moved parallel to the support roller axis in order to create the space required for the roll change between adjacent winding devices. In extreme cases, the partial webs of a reel cutting machine to be wound can thus be as narrow as the width of the two assemblies 44 (FIG. 3) of a winding device arranged on both sides of the reel to be wound.

Claims (5)

1. Reeling device, especially for reel-cutting machines of the backing roll type, on which machines at least one wide reel of a web of papers or similar can be divided into several narrow reels (25) respectively and which machines are preferably equipped with a reeling-off station for at least one wide reel, with a cutting station for cutting the web lengthwise and with two reeling-up stations with respectively at least one reeling device, the two reeling-up stations being arranged on either side of a single or several, in particular two, backing rolls (30), with at least one reeling device (101; 102) being fitted and consists of
      at least two supporting arms or supporting structures (10) for carrying a reel (25) to be reeled during the reeling process
      one clamping head (15) each per supporting arm or supporting frame for holding each reel (25) centrally and rotatably and
      at least one reeling drive unit per reeling device (101; 102)
      whereby the drive shaft (45) of a drive motor (17) of the reeling drive unit is arranged offset to the reeling shaft (46) of the reel (25) and during the reeling process the reel to be reeled (25) is moved characterised in that
      the drive motor (17) with its drive shaft (45) is arranged on the supporting arm or supporting structure (10) and fixed parallel to the reeling shaft (46) of the reel (25) and has a drive wheel (22)
      a belt (23) such as a flat, toothed, V-shaped belt, cable or similar or a chain or similar as well as a drive wheel (13), connected to the clamping head (15) in the direction of drive, are preferably provided on a single shaft (14) and the belt (23) or chain winds round the drive wheel (22) and the drive wheel (13), so that the drive wheel (13) can be driven by the driven wheel (22) in the direction of rotation and
      the diameter determining the drive action of the driven wheel (22) is greater than at least one part of the active driving members (18) of the drive motor (17) and encompasses this driving member along at least one part of its axial length.
2. Reeling device according to claim 1, characterised in that the active driving member (18) that can rotate in operation has an outer diameter that is at least approximately as large as or greater than the largest outer diameter of the drive motor (17), in particular, that the drive motor is a three-phase external rotor motor or a direct current disc armature motor.
3. Reeling device according to claim 1 or claim 2, characterised in that the supporting arms or the supporting structures (10), as known, have guides (12) for the controlled movement or displacement of a carriage (11) carrying the reel (25) to be reeled in accordance with the increase in the reel diameter during the reeling process
      that the drive wheel (13) is arranged on at least one of the carriages (11) of a reeling mechanism (101) and
      that return elements (27, 28) for the belt (23) or the chain are arranged on the supporting arm or supporting structure (10) of which there is at least one such that the drive power in each of the positions necessary for the reeling processs of the carriage (11) can be transmitted to the drive wheel (13) in connection with the supporting arm or supporting structure (10).
4. Reeling device according to claim 3, characterised in that one additional return element (29, 31) for the belt 23 or the chain is arranged on the carriage (11) in connection with the drive wheel (13) both on the side of the oncoming as well as on the side of the outgoing strand of the belt 23 or chain such that in each position of the carriage (11) in connection with the supporting arm or supporting structure (10) the same ratios prevail in relation to the length and the angle of wrap on the drive wheel (13).
5. Reeling device according to claim 3 or 4, characterised by a rotating traction mechanism (32), such as a chain, arranged on at least one supporting arm or supporting structure (10) per reeling mechanism (101) and acting on the carriage (11) in order to produce a linear pressure between the reel to be reeled and the backing roll (30) of which there is at least one during the reeling process or to move or displace the carriage, or both.

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