Device for unrolling material web from one or more material web webs

Abstract

The invention relates to a device (100) for spreading a material web from a plurality of material web webs (110), comprising: a machine frame (102); a main bearing point (105), which is arranged and fastened in particular on the machine frame, for rotatably supporting a first shaft (109) for a first web of material (110), the web of material being unfoldable; a first drive shaft (121) for rotationally driving the first web of material, the first drive shaft being able to be placed indirectly or directly on the outer circumference of the first web of material in order to transmit a drive force; a first pair of pivot arms, the pivot arms (122) of which are pivotably mounted in the frame, an end of the first drive shaft being rotatably mounted in each of the pivot arms; and a secondary bearing point arranged on the frame, by means of which the shaft can be received from the main bearing point and / or a second shaft for a second web of material web can be supported.

Description

Technical Field

[0001] The invention relates to a device for unwinding a material web from one or more material web rolls. Background Art

[0002] Such devices are known for numerous applications. A material web is often unwound from a first material web roll. Paper webs are often used as the material web, but plastic webs are also used. Therefore, the invention will be generally described below with reference to material webs. Often, not only paper webs but also plastic webs are required to produce such hoses in machines for producing tubes, which are later used to form bags and packages. A plurality of the devices mentioned above are typically provided in a hose production machine, as these are often multi-layer hoses. Such hoses can then each consist of two paper layers surrounding a plastic layer. In this case, three of the devices mentioned above for unwinding the material web are required.

[0003] To enable continuous unwinding of the web, the system can be supplied with a further web coil. The web start point of this further web coil is connected to the web end point of the web coil just unwound. Furthermore, the first web coil is removed from the unwinding station and the further web coil is placed in the winding station at the location of the first web coil. After this exchange of web coils, the further web coil becomes the first web coil, so that the described exchange can be repeated after the unwinding period.

[0004] This device that can realize especially continuously unwinding material web from a plurality of material web coils takes up large structural space.In the application situation that wherein needs a plurality of devices in machine interior, therefore need particularly a lot of space. Summary of the Invention

[0005] It is therefore the object of the present invention to provide a device of the generic type which is of compact design and thus saves space.

[0006] This object is achieved by a device according to claim 1 .

[0007] The device according to the invention for unwinding a material web from a plurality of material web coils is equipped with: • Rack, • a main bearing point arranged and in particular fastened to the machine frame, which serves to rotatably support a first shaft for a first material web coil, wherein the material web coil can be unwound, • a first drive shaft for rotationally driving the first material web, wherein the first drive shaft can be attached indirectly or directly to the outer circumference of the first material web for transmitting the driving force, • a first pivot arm pair, the pivot arms of which are pivotably mounted in the machine frame, wherein one end of the first drive shaft is rotatably mounted in each pivot arm, • a secondary bearing arranged on the machine frame, by means of which a shaft can be received from the primary bearing and / or is provided for supporting a second shaft for a second material web coil, • a second drive shaft for rotationally driving the material web coil supported on the secondary support, wherein the second drive shaft can be attached indirectly or directly to the outer circumference of the material web coil supported on the secondary support for transmitting the driving force, • a second pivot arm pair, the pivot arms of which are pivotably mounted in the machine frame, wherein one end of the second drive shaft is rotatably mounted in each pivot arm, In this case, viewed from a vertical center line of the first drive shaft and / or the second drive shaft, the pivot arms of the first pivot arm pair are arranged further outward relative to the frame than the pivot arms of the second pivot arm pair.

[0008] In the device according to the present invention, a frame is first provided, which can be embodied in particular as a support frame. Thus, a rectangular frame composed of tubes can, for example, form the basis for the further features of the present invention, which are described below. The features described below, namely, the functional elements of the present invention, can be directly connected to the frame, either fixedly or movably, or indirectly arranged on the frame via further intermediate components.

[0009] A first shaft is provided for supporting the first material web coil, which can also be referred to as a bearing shaft. This shaft can be rotatably supported in a main bearing for unwinding. The main bearing is arranged on or in the machine frame. Preferably, the main bearing or some of its components are fixedly, that is, immovably, arranged on the machine frame. The main bearing can, for example, include two supporting surfaces, which are preferably spaced apart from each other in the axial direction of the shaft so that the shaft can rest with its ends on the supporting surfaces. In one embodiment, the supporting surfaces can be contained by a pair of supports, wherein the supports of the pair of supports are also spaced apart from each other. The arrangement just described enables unwinding of the material web from the material web coil.

[0010] To unwind the material web, a coil and / or a supporting shaft are typically driven. According to the present invention, a drive shaft is provided for rotationally driving the first material web coil. The drive shaft can be attached to its periphery indirectly or directly for transferring the material web coil. "Directly" means that the drive shaft itself can be attached to the periphery of the material web coil in a force-locking manner. "Indirectly" means that the drive shaft carries at least one additional element that is rotationally fixedly connected to the drive shaft and transfers the driving force to the periphery of the material web coil. This element can be at least one sleeve or at least one drive wheel.

[0011] In order to ensure that the drive shaft can continue to act on the outer periphery of the material web coil even when the circumference of the material web coil decreases over time, the drive shaft must be able to move relative to the material web coil and therefore relative to the main bearing point. To this end, the present invention provides that each end of the drive shaft can be supported in a pivot arm of a first pivot arm pair, wherein the pivot arm pair is in turn pivotably supported at or in the frame. In particular, the end of the drive shaft is supported at or in the end of each pivot arm, while the second end of each pivot arm is rotatably connected to the frame. Preferably, each of these pivot arms of the first pivot arm pair can be pivoted by means of a drive, wherein the drive can be configured as a piston-cylinder unit. Each of these piston-cylinder units is preferably also supported at the frame.

[0012] When the first material web coil is almost unrolled, the coil needs to be replaced. In order to achieve this, a secondary support is provided, which is arranged in or on the frame. The secondary support makes it possible to remove the shaft and therefore in particular the first material web coil from the main support. Preferably, this removal is carried out when the first material web coil is almost unrolled, that is, when more than 70%, in particular more than 80% and preferably 90% of the original length of the unrolled material web has been reached. In this case, a secondary support with a lower load-bearing capacity than the main support can be provided, which results in a cost-effective construction of the secondary support. However, it can also be provided that a new material web coil can be supplied to the device in the following manner, namely: the new material web coil can be placed in the secondary support and can be kept ready. After the material web has been unrolled from the first material web coil, a new second material web coil can then be supplied to the main support, so that the unrolling process can then be continued.

[0013] A second drive shaft is provided for driving the material web located on the secondary support, which in turn acts on the outer circumference of the material web supported on the secondary support and transmits the driving force to the material web. The second drive shaft can also apply the driving force to the material web directly, i.e., by direct contact, or indirectly via another element that transmits the driving force.

[0014] In order to also be able to respond to a decrease in the diameter of the material web supported on the secondary support point, a second pair of pivot arms is provided. The end of the second drive shaft is supported in each pivot arm of this pair of pivot arms. The pivot arms are also pivotably supported in the machine frame. Preferably, the pivot arms of the second pair of pivot arms are also pivoted by a servo drive, which can be designed as a piston-cylinder unit. The piston-cylinder unit, which is preferably operated by compressed air, makes it possible to maintain a constant or substantially constant pressure force on the material web even when the circumference of the material web decreases.

[0015] The present invention further provides that, viewed from a center perpendicular to the first and / or second drive shaft, the pivot arms of the first pivot arm pair are positioned further outboard than the pivot arms of the second pivot arm pair. In other words, the pivot arms of the first pivot arm pair occupy a greater distance from the center perpendicular to the first and / or second drive shaft than the pivot arms of the second pivot arm pair. Instead of the center perpendicular to the first and / or second drive shaft, a center plane defined by these center perpendiculars can also be considered as the reference plane for describing the present invention. The same applies to the center plane of the frame, which will be explained later.

[0016] In the manner described, it is possible for the first and second drive shafts to simultaneously abut the first material web coil, at least briefly, without colliding in the region of the pivot arms. This allows the two pivot arm pairs to be arranged to the right or left of a vertical plane spanned by the axis of the support shaft, when viewed in the axial direction of the first support shaft carrying the first material web coil. This ultimately results in the desired compact design of the apparatus according to the invention. Furthermore, this arrangement allows for free access to the respective other side for removing an unwound material web coil and / or supplying a new material web coil, thereby reducing or even completely eliminating the risk of damage to the transport device and / or injury to the operator.

[0017] In a particularly preferred embodiment of the present invention, the radial extent of the first pivot arm pair is greater than the radial extent of the second pivot arm pair. The radial extent of a pivot arm is the direct distance between the pivot bearing of the pivot arm (in particular, by means of which the pivot arm is supported on the machine frame) and the bearing of the drive shaft supported in the pivot arm. Therefore, this direct distance is greater for the pivot arm of the first pivot arm pair than for the pivot arm of the second pivot arm pair.

[0018] When viewed in the direction of a centerline perpendicular to the first and / or second drive shaft, or more precisely, preferably in any pivot position that each pivot arm pair can assume relative to the machine frame, the frame formed by the first pivot arm pair and the first drive shaft surrounds the frame formed by the second pivot arm pair and the second drive shaft. This ensures that the pivot arm pair and the respectively assigned drive shaft do not interfere with each other and, in particular, do not collide in any particular operating situation.

[0019] In another advantageous embodiment of the present invention, the secondary support comprises a third pivot arm pair, the pivot arms of which are pivotally mounted in the machine frame and, viewed from a vertical centerline, are arranged further outward than the pivot arms of the second pivot arm pair and, in particular, further inward than the pivot arms of the first pivot arm pair. Thus, the secondary support is constructed similarly to the first and / or second pivot arm pairs. This means that the pivot arms of the secondary support are similarly connected to the machine frame at their first ends via pivot bearings, while their second ends are designed and intended to support the ends of the shafts of the support material web coils. Advantageously, in this embodiment, the pivot arms of the second pivot arm pair do not collide with the pivot arms of the secondary support, as the pivot arms of the second pivot arm pair are arranged further inward. This allows the pivot bearings of the two aforementioned pivot arm pairs to be arranged at a very small distance from one another, which contributes to the compact design of the apparatus according to the present invention. Preferably, the pivoting movement of the pivot arms of the third pivot arm pair is induced by a screw drive. To this end, a spindle drive motor can be supported on the machine frame, and a spindle nut can be arranged on the relevant pivot arm. The spindle drive motor can be used to rotationally drive the spindle, so that rotation of the spindle screwed into the spindle nut can achieve pivoting of the relevant pivot arm. The spindle nut is particularly pivotally fastened to the pivot arm, while the spindle drive motor is particularly pivotally arranged on the machine frame.

[0020] Advantageously, a fourth pivot arm pair is provided, in which a cutting device, in particular an end of a cutting rod, is supported. The cutting device is used to cut the first material web when the starting point of the second material web is already fastened to the first material web. In particular, it is provided that, viewed perpendicular to the centerline of the first and / or second drive shaft, the pivot arms of the fourth pivot arm pair are arranged further inward relative to the machine frame than the main bearing point and / or the pivot arms of the first pivot arm pair.

[0021] Advantageously, a force-supply device is provided, by means of which a force can be applied to the second pivot arm, wherein the force-supply device is supported on the third pivot arm. Since the force-supply device is supported on both pivot arms, a pivoting movement of the second pivot arm relative to the frame can be achieved without having to adapt the pivot position of the third pivot arm. The second and third pivot arms can thus be understood as a moving unit relative to the frame. The force-supply device can in turn be a screw-screw-nut combination or a piston-cylinder unit. In the latter case, the piston-cylinder unit can preferably be operated with compressed air. This allows, on the one hand, the pressing force to be set, and, on the other hand, a tolerance for concentricity errors. The force-supply device is preferably pivotably supported on the second and third pivot arms.

[0022] It is even advantageous if the pivot bearings of the second and third pivot arm pairs are aligned with one another. This results in a particularly compact and simple design of the device. In this case, an axis can be provided in the frame, on which the pivot arms of the second and third pivot arm pairs are each supported via a pivot bearing.

[0023] Furthermore, it is advantageous if the radial extension of the pivot arms of the third pivot arm pair is smaller than the radial extension of the pivot arms of the first pivot arm pair and / or greater than or equal to the radial extension of the pivot arms of the second pivot arm pair. The radial extension of the pivot arms of the third pivot arm pair can be understood in the same way as the radial extensions described above for the first and second pivot arm pairs. In particular, this embodiment means that the frame formed by the first pivot arm pair and the first drive shaft also encompasses the frame formed by the third pivot arm pair and the shaft carrying the material web. This, in turn, allows for a compact design of the apparatus according to the present invention.

[0024] In another embodiment of the present invention, it can be particularly advantageous if the radial extent of the pivot arms of the third pivot arm pair is the same as the radial extent of the pivot arms of the second pivot arm pair. In this embodiment, the second drive shaft can be pivoted onto the material web and pressed onto it with a pressing force, wherein the force vector of the pressing force extends substantially in the direction defined by the connecting line between the second drive shaft and the shaft supporting the material web in the secondary bearing area. The pressing force extends specifically in the described direction when the axes of the pivot bearings of the second and third pivot arm pairs are aligned. This direction of the resulting pressing force is maintained even if the diameter of the material web decreases due to unwinding.

[0025] In an advantageous embodiment of the present invention, at least one pivot arm of the first pivot arm pair and / or the second pivot arm pair each includes a drive for rotationally driving the drive shaft. The drive is preferably designed as an electric motor that applies torque to the drive shaft. One or more intermediate shafts and / or transmission stages can be provided between the drive and the drive shaft. Advantageously, the electric motor is arranged so that its rotor extends at least partially parallel to the extension of the pivot arm. The term "extension" has already been explained above with respect to the pivot arm. The term "at least partially parallel" also includes that the shaft can be pivoted as viewed in the circumferential direction of the drive shaft. Overall, this arrangement of the drive means that the electric motor requires little structural space in the axial direction of the drive shaft, resulting in a compact device according to the present invention.

[0026] Advantageously, the rotor shaft of the drive is connected to the drive shaft in a torque-transmitting manner by means of a deflection gear mechanism. In particular, in combination with an at least partially parallel arrangement of the rotor shaft relative to the extension of the associated pivot arm, the deflection gear mechanism results in a particularly space-saving design.

[0027] In an advantageous embodiment of the present invention, the first pivot arm of the first and / or second pivot arm pair carries a drive motor for driving the first and / or second drive shaft, wherein the second pivot arm of the first and / or second pivot arm pair carries a balancing device for compensating the weight of the drive motor. This aspect of the present invention can also be presented as an independent invention. Advantageously, the weight force acting on the relevant pivot arm due to the motor also acts at least partially on the second pivot arm. This prevents different pressing forces along the axial length of the drive shaft, which could otherwise lead to uneven unrolling of the material web or even damage to the material web coil.

[0028] Furthermore, it is advantageous if at least one pivot arm of the second pivot arm pair carries a drive for rotationally driving the second drive shaft, wherein the pivot arm of the first pivot arm pair, which is arranged on the same side as the pivot arm of the second pivot arm pair carrying the drive, as viewed from a vertical centerline, is arranged at a distance from the pivot arm carrying the drive that is greater than the structural depth of the drive. In other words, the pivot arm of the first pivot arm pair is spaced sufficiently apart from the pivot arm of the second pivot arm pair carrying the drive that the two pivot arms can move past each other without a collision between the pivot arm of the first pivot arm pair and the drive motor. This ensures that the first and second pivot arm pairs do not collide even if one of the pivot arms of the second pivot arm pair carries a drive.

[0029] In another advantageous embodiment, the pivot arms of the first pivot arm pair, in particular the pivot arms of the first pivot arm pair, which are arranged on the same side as the pivot arms of the second pivot arm pair, carrying the drive, as viewed from a vertical centerline. The drives for both drive shafts are thus located on one side of the device, which improves accessibility to the drives. Advantageously, the drives are arranged on the side of the first pivot arm facing away from the second pivot arm pair, allowing the two pivot arms to be arranged close together, further improving the compact design of the overall device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Further advantages, features, and details of the invention are apparent from the following description, in which several exemplary embodiments are explained in detail with reference to the accompanying drawings. The features mentioned in the claims and in the description can be essential to the invention individually or in any combination. Within the framework of the entire disclosure, the features and details described in conjunction with the method according to the invention also apply, and vice versa, to the apparatus according to the invention, so that reference is always made to each other or to various aspects of the invention with respect to the disclosure. The accompanying drawings: Figure 1 A side view of the device according to the invention is shown in the deployed operation. Figure 2 Shown as Figure 1 , but with the secondary support pivoted towards the primary support, Figure 3 Shown as Figure 2 side view in FIG, wherein, however, the material web coil is removed from the primary support via the secondary support, Figure 4 Shown as Figure 3 , wherein, however, a first material web coil is laid down and a material web is unwound from a second material web coil, Figure 5 shows a top view of the device according to the invention, Figure 6 Shown from Figure 1 View VI-VI. DETAILED DESCRIPTION

[0031] Figure 1 A device 100 according to the invention is shown for unwinding a material web 101 in an unwinding operation.

[0032] The device 100 comprises, in particular, a machine frame 102 comprising a plurality of components, which are not described in greater detail. The machine frame 102 comprises a base frame 103 and longitudinal supports 104 extending in the direction x and supported on the base frame 103 .

[0033] Furthermore, a main bearing 105 is provided, which is arranged in particular on the machine frame 102. The main bearing 105 comprises as essential elements a vertical support 106, i.e. a support extending in the direction Y, and a support element 107 with a receptacle 108 for an axle 109, wherein the vertical support and the support element can be designed as a unit. The receptacle for the axle is located at Figure 1 A simple groove is shown in the figure, however the structure is more complex but this is not shown for better clarity.

[0034] The shaft 109 carries a first material web winding structure 110 on which the unwound material web 101 is wound. The material web 101 is drawn off via a plurality of guide elements and / or deflecting rollers (of which deflecting roller 111 is shown representatively) and fed, for example, to a hose forming station.

[0035] Because the material web winding structure 110 is typically very heavy and the material web is not sufficiently tear-resistant, it is not possible to move the material web winding structure by applying a tensile force to the material web. Therefore, provision is made for a driving force for rotational drive to act on the material web winding structure 110. In the illustrated embodiment, this driving force is transmitted to the circumferential surface of the winding structure 110. For this purpose, a first drive shaft 120 can be provided, which can be rotationally driven and, for example, rests against the circumferential surface of the winding structure 110. However, it is also possible for the first drive shaft to carry two or more first drive discs 121, which transmit the driving force to the circumferential surface of the material web winding structure 110.

[0036] The driving force is provided by the first drive motor 180, which is combined with the following Figure 6 The first drive shaft 120 is rotatably supported in the first pivot arm pair, wherein the first drive shaft 120 is rotatably supported in the first pivot arm pair. Figure 1 The pivot arm 122 can be seen in the figure. The pivot arm 122 is pivotably supported in the longitudinal support 104 via a pivot bearing 123.

[0037] A first pivot drive 124 is provided for pivoting the pivot arm 122. The first pivot drive is supported in an articulated manner at its first end on the machine frame 10, in particular, on its support 104, via a first spherical bearing 125. The pivot arm 122 is articulatedly connected to the pivot drive 124 via a second spherical bearing 126. The pivot drive itself can be designed, in particular, as a compressed air-operated piston-cylinder unit that is preferably bidirectional, i.e., actively operable in both directions. This piston-cylinder unit can be used, in particular, to set a pressing force with which the drive shaft 120 and / or the drive disc 121 can be positioned on the material web winding arrangement 110.

[0038] The combination of the device according to the invention Figure 1 The described components are necessary for the unwinding operation of the first material web winding arrangement 110. In order to be able to replace the nearly unwound material web winding arrangement 110, the material web winding arrangement 110 must first be removed from the main winding area 105. For this purpose, an auxiliary winding area or secondary winding area 130 is provided. This secondary winding area comprises a second pair of pivot arms 131 and a third pair of pivot arms 132.

[0039] Only one pivot arm is visible from the third pivot arm pair 132, whose first end is pivotably supported in the machine frame 102, in particular in its support 104, by means of a third pivot bearing 133. The second end of the pivot arm 132 is designed and configured to receive the end of the shaft 109. For greater clarity, this shaft receptacle is again merely represented as a deepening or recess 134. In a specific embodiment, a shaft receptacle, such as a shaft lock, can be provided, which first allows the pivot lever 132 to be pivoted below the shaft 109. The shaft receptacle can then be used to lift the shaft 109 from the receptacle 108 of the main bearing and secure it against relative movement relative to the pivot lever 132.

[0040] The third pivot arm 132 is pivoted by a third pivot drive 137. This pivot drive is connected to the frame 102, in particular to the support 104, in an articulated manner. Similarly, the pivot drive 137 is articulated to the pivot arm 132. The pivot drive is preferably configured as a screw-nut combination, thereby enabling precise positioning of the pivot arm 132, which is advantageous for receiving the shaft 109. To this end, the pivot drive includes a motor 138, which drives a screw 139. The screw 139 is screwed into a nut 140, which is arranged in an articulated manner on the pivot arm 132 but cannot rotate relative to the pivot arm. Therefore, rotation of the nut causes lateral movement of the nut and, therefore, pivotal movement of the pivot arm. The arrangement of the nut 140 and the motor 138 is also interchangeable.

[0041] In order to drive the shaft 109 and / or the material web winding arrangement 110, a second drive shaft 135 is provided in the pivot lever of the second pair of pivot arms 131, which can be driven by Figure 1The second drive shaft 135 can be mounted directly on the material web winding structure 110 or can carry a drive disc 136 or other drive force transmitting element that transmits the drive force from the drive shaft 135 to the outer periphery of the material web winding structure. The drive of the material web by the second drive shaft 135 described above is necessary when the first drive shaft 120 or the first drive disc 121 is no longer in contact with the material web winding structure 110.

[0042] As already described, only pivot arm 131 is visible from the second pivot arm pair. A second pivot drive 141 is provided for the pivoting movement of the second pivot arm pair. Pivot drive 141 is preferably designed as a compressed air-operated piston-cylinder unit, with its first end articulated to second pivot arm 131 and its second end articulated to third pivot arm 132. Consequently, when third pivot drive 137 is actuated, pivot arm 131 and, simultaneously, pivot arm 132 pivot relative to the machine frame. As long as pivot drive 141 is not actuated, second pivot arm 131 and third pivot arm 132 remain unchanged relative to one another. Overall, this arrangement ensures that the pressing force exerted by drive shaft 135 or drive disc 136 on the material web coil can be easily maintained constant, even when pivoting third pivot arm 132 to remove the material web coil from main bearing 107.

[0043] After the material web has reached the determined change diameter, the third pivot arm 132 is pivoted into the receiving position up to the main bearing 107 in order to receive the shaft 109 together with the material web 110. The second pivot drive 141 is then actuated so that the drive shaft 135 or the drive disc 136 comes into driving contact with the outer surface of the material web 110 and can drive it. Shortly before, simultaneously or subsequently, the first pivot arm 122 is pivoted away by means of the pivot drive 124, thereby interrupting the driving contact between the material web 110 and the drive shaft 120 or the drive disc 121. Figure 2 The pivot position achieved by this process is shown in FIG. Figure 1 No additional features are shown, so no reference numerals are given to the features described. These features are directly and clearly shown in FIG. Figure 1 Obtained in.

[0044] Figure 3 The situation is now shown after the pivot arm 132 has been pivoted away from the main bearing 107 after taking over the shaft 109 and the material web coil 110. The material web 101 continues to run away from the material web coil 110. A new shaft 149 carrying a new material web coil 150 is placed on the main bearing.

[0045] exist Figure 4 , the material web 101 is now unwound from a new material web coil 150. A joining step has already been performed, in which the web start of the material web wound on the new material web coil 150 is joined to the material web of the material web coil 110, and in which the old material web is subsequently cut between the material web coil and the joining point of the two material webs. The joining step, which preferably takes place at full production speed, is not shown.

[0046] Figure 4 Furthermore, it is shown that the material web coil is placed or can be placed on a removal station 160. To this end, the removal station 160 comprises two vertical elements 161, i.e., supports extending in the y direction, of which only the vertical elements 160 are visible. The vertical elements are supported on the frame 102. Each vertical element carries a coil track, which is preferably slightly inclined with respect to the x direction, wherein the end of the coil track 162 facing the third pivot arm is raised compared to the end of the coil track facing away from the third pivot arm. At this facing end, each coil track includes a stop element 163, which can be used to stop the rolling movement of the shaft 109, so that the shaft can then be stationary and can be removed from the device 100 without risk.

[0047] To deposit the material web coil 110, the third pair of pivot arms 132 is pivoted further away from the main bearing 107 until the journal of the shaft 109 rests on the coil track 162. The shaft 109 is then released from the shaft receptacle of the third pair of pivot arms 132 so that it is freely movably supported and can roll along the coil track.

[0048] With the release of the shaft 109 with the remaining portion of the material web 110, the Figure 1 The status shown in .

[0049] Figure 5 Shown in Figure 1 A top view of the device 100 in the operating state. Starting from the axial center of shaft 109, radial directions span a central plane 170, which is also the central plane for the other shafts, in particular, at least one of the drive shafts 120 and 135. A vertical line lying on this central plane and perpendicular to the axis of rotation of one of these drive shafts can be understood as a central perpendicular line. Viewed to the right or left of central plane 170, i.e., in or against direction z, the individual components are arranged according to the present invention. This view shows that the essential features of the device according to the present invention are present in duplicate and are generally arranged in mirror-symmetry with respect to central plane 170.

[0050] The pivot arms 131 of the second pivot arm pair are arranged at a minimum distance from the center plane 170. The pivot arms 132 of the third pivot arm pair are arranged further outwards. It can be provided that the pivot arm 131 is located within the area defined by the longitudinal supports 104 and the pivot arm 132 is located outside the area defined by the longitudinal supports 104. A common shaft 171 is provided for the two pivot arms, which runs through the respective longitudinal supports 104 and on which the pivot arms 132 and 131 are pivotably supported via bearings, thus forming a pivot bearing, wherein in Figure 1 The pivot bearing 133 is shown in FIG.

[0051] The pivot arm 122 of the first pivot arm pair is coupled further outwards than the pivot arm pair 132. This pivot arm is preferably arranged further away from the center plane or the center vertical line than the pivot drive 137 of the pivot arm of the third pivot arm pair 132.

[0052] Starting from the central vertical line or central plane 170, the components of the removal station 160 are arranged between the pivot arm 131 of the second pivot arm pair and the pivot arm 122 of the first pivot arm pair. Figure 1 Reference numerals are known per se but are not explained again here.

[0053] Preferably, provision is made for the removal station 160 to be arranged between the pivot arm 132 of the third pair of pivot arms and the pivot arm 122 of the first pair of pivot arms.

[0054] Figure 6 Now it is shown from Figure 5 VI-VI of FIG. 3 , a side view of the device according to the invention. The individual elements in this figure have the same reference numerals as in the preceding figures.

[0055] In this view, the spacing of the pivot arms of the respective pivot arm pair relative to the center plane 170 becomes apparent again.

[0056] Furthermore, it can be seen that, viewed in the vertical direction, i.e. in direction y, the pivot arm 122 of the first pivot arm pair has a greater extension than the pivot arm 132 of the third pivot arm pair. Furthermore, viewed in direction y, the pivot arm of the first pivot arm pair has a greater extension than the pivot arm 131 of the second pivot arm pair.

[0057] Furthermore, it is advantageous if, viewed in the vertical direction, ie, in the direction y, the pivot arm 132 of the third pivot arm pair has a greater extension than the pivot arm 131 of the second pivot arm pair.

[0058] In addition, compared with the above figures, Figure 6The drive motor 180 can be seen, which is used to set the drive shaft 120 into rotational motion. Therefore, as long as the drive disc 121 is in frictional contact with the material web winding arrangement 110, the drive motor drives the material web winding arrangement 110 via the drive shaft 120 and the drive disc 121. The driving force of the motor 180 is preferably transmitted to the drive shaft 120 via the motor shaft 181 and the helical gear mechanism 182. The drive motor 180 and the helical gear mechanism 182 are arranged on one of the pivot arms 122 of the first pivot arm pair. To prevent different movements of the two pivot arms 122 under the influence of gravity due to the weight of the drive assembly arranged on this pivot arm when the pivot arm is pivoted, a counterweight 183 is provided on the pivot arm 122 that does not carry the drive motor. This counterweight has the same mass as the aforementioned drive assembly, which primarily comprises the drive motor, motor shaft, and steering mechanism. However, the balancing weight can also include the same drive assembly, wherein both ends of the drive shaft 120 are then driven. Instead of the balancing weight, it can also be provided that the pivot drive 124 acts on the pivot arm 122 with different pivoting forces, so that in this way the weight forces acting differently on the pivot arm can be compensated.

[0059] Drive shaft 135 can be driven in the same manner as drive shaft 120. For this purpose, a drive motor 190, a motor shaft 191, and a steering gear 192 are provided, which are arranged on one of the pivot arms 131 of the second pair of pivot arms. Their structure, mode of operation, advantages, and variations correspond to those described above in connection with drive elements 180, 181, and 182. The same applies to counterweight 193.

[0060] However, it can be seen that the dimensions of the drive assemblies 190, 191, 192 and the dimensions of the counterweights are designed such that they are smaller than the free space between the respectively adjacent pivot arms 131 and 132. In other words, the free space between these pivot arms is designed such that it is greater than the maximum space requirement of the largest of the drive assemblies 180, 181, 182, as viewed in the direction z.

[0061] List of reference numerals: 100 Equipment for unwinding material webs 101 Material format 102 racks 103 Basic Framework 104 longitudinal bearing member 105 Main support part 106 vertical bracket 107 load-bearing components 108 Receptacle for shaft 109 Axis 110 Material width winding structure 111 Steering Roller 120 drive shaft 121 driver disk 122 pivot arm 123 pivot bearing 124 Pivot Drive 125 First joint bearing 126 Second joint bearing 130 Auxiliary winding part or auxiliary winding part 131 Second pivot arm pair 132 third pivot arm pair 133 Third pivot bearing 134 Deepening / groove 135 Second drive shaft 136 Driver disk 137 Third pivot drive 138 Motor 139 screw 140 screw nut 141 Second pivot driver 149 New Axle 150 New material rolls 160 Remove Station 161 vertical elements 163 Stop element 170 center plane 171 Common Axis 180 drive motor 181 Motor shaft 182 Helical gear transmission mechanism 183 Balance Weight 190 drive motor 191 Motor shaft 192 Steering transmission mechanism 193 Balance weight.

Claims

1. A device for unwinding a material web from a plurality of material web coils, the device comprising: • Rack; • a main bearing point arranged and in particular fastened to the machine frame, which main bearing point serves to rotatably support a first shaft for a first material web coil, wherein: The material web can be unwound; • a first drive shaft for rotationally driving the first material web, wherein the first drive shaft can be attached indirectly or directly to the outer circumference of the first material web for transmitting the driving force, • a first pivot arm pair, the pivot arms of which are pivotably mounted in the machine frame, wherein one end of the first drive shaft is rotatably mounted in each pivot arm, • a secondary bearing point arranged on the machine frame, by means of which the shaft can be received from the primary bearing point and / or is provided for supporting a second shaft for a second material web coil, • a second drive shaft for rotationally driving the material web coil supported on the secondary support, wherein the second drive shaft can be placed indirectly or directly on the periphery of the material web coil supported on the secondary support for transmitting the driving force, • a second pivot arm pair, the pivot arms of which are pivotably mounted in the machine frame, wherein one end of the second drive shaft is rotatably mounted in each pivot arm, • wherein, viewed from a center perpendicular line of the first drive shaft and / or the second drive shaft, the pivot arms of the first pivot arm pair are arranged further outward relative to the frame than the pivot arms of the second pivot arm pair.

2. The device according to claim 1, It is characterized by: The radial extension of the first pair of pivot arms is greater than the radial extension of the second pair of pivot arms.

3. The device according to any one of the preceding claims, It is characterized by: The secondary bearing point comprises a third pivot arm pair, the pivot arms of which are pivotably supported in the machine frame and, viewed from the center vertical line, are arranged further outwards than the pivot arms of the second pivot arm pair and in particular further inwards than the pivot arms of the first pivot arm pair.

4. The device according to any one of the preceding claims, It is characterized by: The radial extension of the pivot arms of the third pair of pivot arms is smaller than the radial extension of the pivot arms of the first pair of pivot arms and / or is greater than or equal to the radial extension of the pivot arms of the second pair of pivot arms.

5. The device according to any one of the preceding claims, It is characterized by: A force application device is provided, by means of which a force can be applied to the second pivot arm, wherein the force application device is supported / fastened on the third pivot arm.

6. The device according to any one of the preceding claims, It is characterized by: At least one pivot arm of the first pair of pivot arms and / or the second pair of pivot arms comprises a drive for rotationally driving the drive shaft.

7. The device according to any one of the preceding claims, It is characterized by: At least one pivot arm of the second pivot arm pair carries the drive for rotating the second drive shaft, wherein the pivot arm of the first pivot arm pair, which is arranged on the same side as the pivot arm of the second pivot arm pair carrying the drive as seen from the center vertical line, is arranged at a distance relative to the pivot arm carrying the drive that is greater than the structural depth of the drive.

8. The device according to any one of the preceding claims, It is characterized by: The pivot arms of the first pivot arm pair, in particular the pivot arms of the first pivot arm pair which are arranged on the same side as the pivot arms of the second pivot arm pair carrying the drive, as viewed from the center vertical line, carry the drive.

9. The device according to any one of the preceding claims, It is characterized by: The rotor shaft of the drive is connected to the drive shaft in a torque-transmitting manner by means of a deflection gear mechanism.

10. The device according to any one of the preceding claims, It is characterized by: The first pivot arm of the first pivot arm pair and / or the second pivot arm pair carries a drive motor, which is used to drive the first drive shaft and / or the second drive shaft, wherein the second pivot arm of the first pivot arm pair and / or the second pivot arm pair carries a balancing device, which is used to balance the weight of the drive motor.

11. The device according to any one of the preceding claims, It is characterized by: The balancing device comprises a monolithic element, in particular a block, which comprises at least one metal.

12. The device according to any one of the preceding claims, It is characterized by: The balancing device comprises a second drive motor, which is in particular identical to the first drive motor.

13. The device according to any one of the preceding claims, It is characterized by: The balancing device comprises a force providing device, by means of which a force can be acted upon the second pivot arm, wherein the force providing device is in particular supported on the machine frame.

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