Gripping device, winding device, and manufacturing device

Abstract

The present invention relates to a gripping device for gripping a winding core, a winding device for winding and unwinding a flat band-shaped material, and a manufacturing device for manufacturing a band-shaped material.SOLUTION: This fixing device is provided with a base body, a gripping head 48, and a fixing device 50, and fixes a winding core material. The fixing device (50) is adjustable between a fixing position and a release position, and the gripping head (48) is axially movable between an extended position and a retracted position with respect to the base body. The fixing device (50) in the fixing position fixes the gripping head (48) in the extended position and forms a fixed stop for the gripping head (48). In addition to the device for producing a band-shaped material, a winding device is also provided.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a gripping device for gripping a winding core, a winding device for winding and unwinding a flat strip of material, and a manufacturing device for manufacturing a strip of material. [Background technology]

[0002] For example, a strip of material, such as a thin resin film, is wound onto a winding core. The length of the winding core must be equal to the width of the strip, and the strip must be wound together. The latest technology in strip-forming equipment is to produce strips of material with larger widths, and the axial length of the winding core that can be used for this purpose is longer.

[0003] The total weight of the winding core, which includes the winding bale that completely winds the web-like material, increases significantly with the length of the winding core, which increases the requirements of the winding device. The winding device typically has at least one winding space with two gripping heads that engage with the front ends of the winding cores to grip the winding cores. One of the gripping heads is axially fixed, while the other gripping head is movable. The fixed, small gripping head is located on the operator's side of the winding device, minimizing interference with the operator's operation when operating the winding device. Summary of the Invention [Problem to be solved by the invention]

[0004] When a winding core with a fixed gripping head is attached to or removed from a winding device, the winding core must be moved axially to engage the fixed gripping head. The axial movement of the winding core exerts an axial pressing force on the winding device or the support, reinforcing and strengthening the support, especially for heavy winding cores, which hinders the smooth operation of the operator operating the winding device. [Means for solving the problem]

[0005] The present invention aims to provide a gripping device for a strip-shaped material, a winding device, and an apparatus for manufacturing a strip-shaped material that are designed to be compact for the operator, especially when using a long winding core. The object of the present invention is achieved by a gripping device for gripping a winding core. The gripping device comprises a base body, a gripping head, and a fixing device. The fixing device is adjustable between a fixed position and an open position, and the gripping head is axially movable relative to the base body between an extended position and a retracted position. The fixing device in the fixed position fixes the gripping head in the axially extended position, forming a fixed fastener for the gripping head.

[0006] The gripping heads move from both sides of the winding core to load the winding core between them, so that the axially movable gripping heads can load or unload the winding core onto or from the winding device, even if the winding core does not move axially. As a result, the winding core no longer moves axially, and the axial pressing force acting on the support of the winding device is reduced. The fixing device, which constitutes the fixing fastener of the gripping heads, allows the gripping device to be designed particularly compact and to hold the gripping heads in the extended position without the use of auxiliary members such as spring devices.

[0007] For example, when using a spring or a constantly operating actuator, the locking device means a locking device in a predetermined position that does not exert a constant pressing force. For example, the locking device is arranged axially between the base and the gripping head, in particular the locking part. The base is a bearing, for example a ball bearing.

[0008] In an embodiment of the present invention, a gripping head is secured in the extended position with a gripping force of at least 25 kN to 30 kN and / or the secure fixation prevents axial movement of the gripping head in the secured position from the extended position to the retracted position, providing a reliable fixation device and a reliable fixation fastener.

[0009] In an embodiment of the present invention, the axial length of the locking device in the locked position is longer than the length in the open position, and the difference in size between the locked and open positions is equal to the axial movement distance of the gripper head between the extended and retracted positions. Even with this change in axial length, the locking device can be made very compact.

[0010] The simple and compact fixing device comprises a first fixing means and a second fixing means which are securely connected to each other at a fixing position of the fixing device, the first fixing means at the fixing position being arranged on the axially arranged second fixing means, for example the first fixing means being adjacent to or supported on an axial base in the open position.

[0011] In an embodiment of the present invention, the first fixing means may be a splined shaft and the second fixing means may be a splined cylinder or a splined hub. Alternatively, the first fixing means may be a grooved cylinder and the second fixing means may be a grooved shaft, with the grooved shaft and the grooved cylinder coaxially aligned with each other and with the gripping head. The connection structure between the grooved shaft and the grooved cylinder allows for a highly durable connection structure and a fixed structure in a predetermined position. The grooved cylinder has a shape complementary to the grooved shaft. For example, the teeth of the grooved shaft or the ridges of the grooved cylinder are formed axially flat relative to the corresponding other fixing means (at the fixed position).

[0012] In an embodiment of the invention, the first fastening means are axially fixed to the gripping head and / or are non-rotatably connected to the gripping head and / or the second fastening means are axially supported on a base, which allows a particularly secure fixation of the gripping head in a predetermined position. For a simple handling of the gripping head, the fastening device comprises a cylinder for fastening the gripping head, which cylinder passes through the fastening device, in particular the first fastening means and the second fastening means. The cylinder is particularly arranged coaxially with respect to the first fastening means and the second fastening means and / or passes through the base.

[0013] In an embodiment of the present invention, the gripping device has a first actuator for actuating the locking device, and the first actuator moves the locking device between a locked position and an open position. The first actuator is connected to the first locking means or the second locking means and applies a torque to the corresponding locking means. The locking device can be automatically locked in a predetermined position by the first operator.

[0014] The gripping device comprises a second operator connected to the gripping head for automatically actuating the gripping head, in particular a cylindrical body for applying an axial gripping force to the gripping head, in particular a gripping force of more than 20 kN and / or not more than 25 kN, for example, the second operator can move the gripping head between an extended position and a retracted position.

[0015] A hydraulic or electric cylinder can be used for the second operator.In an embodiment of the invention, the gripping head has a conical engagement surface that positions the winding core in the center of the gripping head.

[0016] The object of the invention is achieved by a winding device for winding and unwinding flat web-shaped material, in particular thin films. The winding device comprises a support having at least one winding space in which a winding core is arranged. The at least one winding space comprises a first gripping device and a second gripping device, the at least first gripping device constituting the gripping device. The features and advantages of the gripping devices equally apply to the winding device and vice versa.

[0017] The first gripping device and the second gripping device, i.e. the corresponding gripping heads, are arranged coaxially with each other. For example, the winding device comprises at least one winding core held by a gripping device rotatably arranged in the winding space.

[0018] The winding core may, for example, have a length of 10 m, in particular at least 12 m, at least 14 m, and / or a weight of more than 20,000 kg, in particular more than 25,000 kg. Particularly large or heavy winding cores may be used. For example, the bale or winding core on which the strip material is wound may have a weight of more than 3 t up to 34 t or more.

[0019] In an embodiment of the invention, the second gripping device is said gripping device with an axially movable gripping head, for example, the support comprises two opposing rollers, the gripping head and the fixing device of the first gripping device being attached to the first roller, and at least the gripping head of the second gripping device being attached to the second roller.

[0020] When the second gripping device is configured as described above, a fixing device can be attached to the second roller. To provide a winding device that continuously winds or unwinds a web-shaped material, the support device has at least two winding spaces, and at least a plurality of gripping heads and fixing devices of a first gripping device of the winding space are attached to the first roller, and at least a plurality of gripping heads of a second gripping device of the winding space are attached to the second roller.

[0021] In an embodiment of the present invention, the first gripping device, which is arranged on the operator's side of the winding device, allows for extremely simple handling. The substrate is immovably fixed to the support, in particular to the corresponding roller and / or part of the support, thereby ensuring stable use of the winding device. Furthermore, the object of the present invention is achieved by an apparatus for producing web-shaped material, in particular a thin-film production apparatus, which includes the above-mentioned winding device. It is clear that the above-mentioned features and advantages of the gripping device and / or the winding device can also be applied to the apparatus for producing web-shaped material, and vice versa. [Brief explanation of the drawings]

[0022] Other features and advantages of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings, in which: [Figure 1] 1 is a perspective view of a thin-film manufacturing apparatus having a gripping device and a winding device, illustrating an embodiment of the present invention; [Figure 2] 2 is a perspective view of a winding device of a thin-film manufacturing apparatus equipped with a gripping device according to the embodiment of FIG. 1; [Figure 3] 3 is a cross-sectional view of the gripping device of FIG. 2 with the gripping head in an extended position and the locking device in a locked position; [Figure 4] 3 is a cross-sectional view of the gripping device of FIG. 2 with the gripping head in the retracted position and the opening device of the locking device; [Figure 5] 4 is a cross-sectional view of the gripping device of FIG. 3 taken along line VV. [Figure 6] 6 is a cross-sectional view of the gripping device of FIG. 4 taken along line VI-VI. [Figure 7] FIG. 3 is an exploded perspective view of a fixing device of the gripping device shown in FIG. 2; [Figure 8] 3 is a cross-sectional view of the winding device of the present invention according to FIG. DETAILED DESCRIPTION OF THE INVENTION

[0023] 1 shows a perspective view of a strip-shaped material manufacturing apparatus 10 equipped with various different associated devices. The illustrated strip-shaped material manufacturing apparatus 10 is, for example, a thin film manufacturing apparatus, but the claims of the present invention should not be construed as being limited by such technical details, which are merely illustrative of an embodiment of the present invention. In this specification, the strip-shaped material B is described as a thin resin film, but the strip-shaped material B also includes other materials that can be stretched, including thin film paper, woven fabrics, other knitted fabrics, etc.

[0024] In the illustrated example, the manufacturing apparatus 10 includes an extruder 12, a casting mill 14, at least one stretching device—machine direction orienter 16, cross direction orienter 18 (TDO)—a pull roll device and / or side edge treatment device 22, and a winder 24. The resin film to be manufactured may be, for example, biaxially oriented polypropylene (BOPP), biaxially oriented polyethylene terephthalate (BOPET), biaxially oriented polyamide film (BOPA), biaxially oriented polyethylene film (BOPE), biaxially oriented polylactic acid film (BOPLA), biaxially oriented capacitor film (BOPP-C), or battery separator film (BSF).

[0025] A resin thin film is produced by extruding the thin film by extruder 12 onto a chill roll of a casting mill 14. To this end, extruder 12 produces a resin melt from starting material, such as granular material, and delivers it to the chill roll to form a thin film. The thin film is transported from casting mill 14 as a strip of material B to machine direction orienter 16, where it is stretched in the machine direction to form a stretched thin film.

[0026] In the machine direction orienter 16, the thin film is heated to a desired temperature and stretched between heated rolls. The thin film is stretched in the machine direction, or tensile direction, between at least two rollers in the machine direction orienter 16 to form a stretched thin film. The thin film obtained by the machine direction orienter 16 is transported to the cross direction orienter 18 and stretched in the cross direction. The cross direction orienter 18 includes a furnace 20 having multiple different (processing) zones for processing the thin film along the tensile direction of the manufacturing apparatus 10.

[0027] In the first zone, called the preheat zone, the thin film is heated. In the subsequent second zone (the "stretch zone"), the thin film is stretched in the transverse direction, so that at the end of the second zone, the thin film has a larger lateral width than at the beginning of the second zone, but a smaller thickness. After the stretching process is complete, the thin film passes through a third and subsequent zones (the "heat treatment zone," "postheat zone," and / or "anneal zone"), where the thin film is treated, for example, at high temperatures to relieve internal stresses in the thin film. The thin film then passes through the final zone (the "cooling zone"), where it is cooled.

[0028] Furthermore, the neutral zones used to separate the zones may be selectively provided between the different processing zones as additional zones of void space with no ventilation function. The zones of the lateral director 18 may be individually divided and / or designed differently along their length. For example, fewer or shorter neutral zones may be provided, or additional neutral zones may be provided at other locations. Variations in the remaining zones are also contemplated.

[0029] After stretching by the transverse direction orienter 18, the biaxially stretched film passes through a tension roller system and / or side edge treatment system 22 and is taken up by a take-up system 24. It is also contemplated that a separate stretching system, such as a simultaneous stretching system 26, may be added to the manufacturing system 10, or that the machine direction orienter 16 and / or the transverse direction orienter 18 with oven 20 may be added to the manufacturing system 10.

[0030] 2 shows a perspective view of a single winding device 24. The illustrated winding device 24 is used for winding the strip material B, but can also be used for unwinding the strip material B. The winding device 24 includes a support 28 and a winding core 30 attached to the support 28.

[0031] The winding core 30 has, for example, a length of at least 10 m, in particular at least 12 m, or at least 14 m, and / or a weight of more than 20,000 kg, in particular more than 25,000 kg. For example, a bale, i.e., a winding core 30 on which the web material B is wound, has a weight of more than 30 t, up to 34 t or even more. The two parts, the first support 32 and the second support 34, constitute the support body 28.

[0032] The first support portion 32 and the second support portion 34 are disposed on opposite side edges of the web-shaped material B; that is, the first support portion 32 is disposed on the operator side (left side in FIG. 2) of the winding device 24 of the manufacturing apparatus 10, and the second support portion 34 is disposed opposite the first support portion 32 on the drive side (right side in FIG. 2) of the winding device 24 of the manufacturing apparatus 10. The support portion 28 includes a first roller 36 mounted on the first support portion 32 and a second roller 38 mounted on the second support portion 34. The first roller 36 and the second roller 38 are disposed rotatably and coaxially aligned with the rest of the support portion 28.

[0033] Two winding spaces 40 are formed around the winding core 30 of the first roller 36 and the second roller 38, and each of the two winding spaces 40 is provided with a first gripping device 42 and a second gripping device 44. In this embodiment, the first gripping device 42 of each winding space 40 is attached to the first roller 36 of the first support part 32, and the corresponding second gripping device 44 is attached to the second roller 38 of the second support part 34 of the support body 28. The first gripping device 42 is provided on the operator side, and the second gripping device 44 is provided on the drive side of the winding device 24.

[0034] The plurality of first gripping devices 42 will be described below by way of example. The remaining second gripping devices 44 are formed identically to the first gripping devices 42. The first gripping devices 42 include a base 46, a gripping head 48, a fixing device 50, a first actuator 52, a second actuator 54, a cylindrical body 56, and a lid 58.

[0035] In the illustrated embodiment of the present invention, the base 46, gripping head 48, fixing device 50, cylindrical body 56, and lid 58 are mounted on the first roller 36. The first actuator 52 and second actuator 54 are also mounted on the first roller 36 or secured to a fixed portion of the support 28.

[0036] 3 shows a cross-sectional view of the first gripping device 42 attached to the first roller 36 with the gripping head 48 in the extended position, and FIG. 4 shows a cross-sectional view of the first gripping device 42 attached to the first roller 36 with the gripping head 48 in the retracted position. As is clear from FIGS. 3 and 4, the first roller 36 has an opening provided in the area of ​​the first gripping device 42. The opening or the rotation axis of the first roller 36 determines the axial direction A of the reel 24.

[0037] A base 46, provided as a bearing or ball bearing, extends through the opening and is non-rotatably connected to the first roller 36. The base 46 also serves as part of the first roller 36, i.e., the support 28. A cylindrical body 56 is disposed in the axial direction A, passing through the opening and the base 46. A gripping head 48 is non-rotatably attached to the end of the cylindrical body 56, facing the second roller 38. The gripping head 48, provided at the end of the cylindrical body 56 facing the second roller 38, has a conical engagement surface 60 whose diameter increases toward the first roller 36. The conical engagement surface 60 engages with the ends of the multiple winding cores 30 and applies a pressing force to the conical engagement surface 60 that contacts the ends of the winding cores 30.

[0038] The second actuator 54 is connected to the cylindrical body 56 for the purpose of moving the gripping head 48 axially by means of the second actuator 54, which can move the gripping head 48 back and forth in the axial direction between an extended position shown in Figure 3 and a retracted position shown in Figure 4. The clearance between the end face of the gripping head 48 and the first roller 36 is larger in the extended position than in the retracted position. The movement clearance, i.e., the difference, of the gripping head 48 between the extended and retracted positions is between 5 cm and 20 cm, in particular 10 cm.

[0039] The second actuator 54 is, for example, a hydraulic cylinder or an electric cylinder. The fixing device 50, which is axially arranged between the gripping head 48 and the first roller 36, has a first fixing means 62 and a second fixing means 64. The second fixing means 64 is supported on the base 46 in the axial direction A and is rotatably attached to the base 46. A cover 58 of the first gripping device 42, which radially covers the second fixing means 64, can also be attached to the base 46 or the first roller 36.

[0040] The fixing device 50, the first fixing means 62, and the second fixing means 64 are hollow, and the cylindrical body 56 can be coaxially disposed through the first fixing means 62 and the second fixing means 64. The fixing device 50, which moves between a fixed position and an open position, has a longer overall length when in the axial fixed position shown in FIG. 3 than when in the axial open position shown in FIG. 4. When the fixing device 50 is in the fixed position shown in FIG. 3, it holds the winding core 30 between the pair of gripping heads 48 in the state shown in FIG. 2. When the winding core 30 is removed from between the pair of gripping heads 48, the fixing device 50 is moved to the open position shown in FIG. 4. The difference in length between the axial fixed position shown in FIG. 3 and the axial open position shown in FIG. 4 corresponds to the movement distance of the gripping heads 48, which is the length between the extended position and the retracted position.

[0041] 5 is a cross-sectional view of the fixing device 50 taken along line VV in the fixing position of FIG. 3, and FIG. 6 is a cross-sectional view of the fixing device 50 taken along line VI-VI in the opening position of FIG.

[0042] FIG. 7 shows an exploded perspective view of the first and second fastening means 62 and 64 of the fastening device 50. In FIG. 7 , which illustrates this embodiment, it will be understood that the first and second fastening means 62 and 64 are respectively a grooved shaft (splined shaft) 66 having axially oriented irregularities formed on its outer circumferential surface and a grooved cylinder (splined hub) 68 having axially oriented irregularities formed on its inner circumferential surface. Conversely, it is conceivable that the inner circumferential surface of the first fastening means 62 may be formed with axially oriented irregularities, and the outer circumferential surface of the second fastening means 64 may be formed with axially oriented irregularities. The grooved shaft 66 has a number of teeth 70 that protrude radially outward and are spaced apart circumferentially. In the illustrated embodiment, the grooved shaft 66 has six teeth 70 evenly distributed circumferentially.

[0043] The teeth 70 of the grooved shaft 66 are formed flat relative to the grooved cylinder 68, which is formed in a complementary shape to the grooved shaft 66. Internal grooves 72 formed in the grooved cylinder 68 that are complementary to the teeth 70 extend through the grooved cylinder 68 in the axial direction A. In the illustrated embodiment, the grooved cylinder 68 has seven internal grooves 72.

[0044] The circumferential ridges formed between adjacent inner grooves 72 of the second fastening means 64 are flattened toward the groove machining shaft 66, i.e., the second roller 38. The first fastening means 62, i.e., the groove machining shaft 66, is connected to the axial gripping head 48. For example, the connection between the groove machining shaft 66 and the gripping head 48 can be achieved indirectly through a threaded connection or attachment to the cylindrical body 56. The illustrated groove machining shaft 66 and the gripping head 48, which constitute the first fastening means 62, can be connected to each other in a non-rotatable manner.

[0045] The first fixing means 62 and the second fixing means 64 do not mean a normal shaft and hub, but are generally understood to mean a grooved shaft 66 and a grooved cylinder 68, as described below. The first actuator 52 connected to the grooved cylinder 68 can rotate and twist the grooved cylinder 68 relative to the base 46 and the grooved shaft 66. For the purpose of rotating the grooved cylinder 68, a radially protruding pin 74, shown in FIGS. 5 and 6, is attached or secured to the grooved cylinder 68. By moving the pin 74 in the circumferential direction, the grooved cylinder 68 is rotated relative to the grooved shaft 66 between a fixed position of the fixing device 50 relative to the winding core 30, as shown in FIG. 3, and an open position of the fixing device 50 relative to the winding core 30, as shown in FIG. 4.

[0046] 3 and 5, when the fixing device 50 is in the locked position, the teeth 70 of the groove cutting shaft 66 are aligned with the raised portions of the grooved cylinder 68 formed between adjacent inner grooves 72 of the second fixing means 64, and the teeth 70 of the groove cutting shaft 66 are disengaged from the inner grooves 72 of the grooved cylinder 68. When the fixing device 50 is in the locked position, when the first fixing means 62, i.e., the groove cutting shaft 66, is moved axially, the teeth 70 of the groove cutting shaft 66 come into contact with the raised portions of the grooved cylinder 68, and the teeth 70 of the groove cutting shaft 66 cannot be inserted into the inner grooves 72 of the grooved cylinder 68. When the pin 74 is moved circumferentially to rotate the second fixing means 64, i.e., the groove cutting shaft 66, relative to the first fixing means 62, i.e., the groove cutting shaft 66, the teeth 70 of the groove cutting shaft 66 are aligned with the inner grooves 72 of the grooved cylinder 68, as shown in FIGS.

[0047] As a result, the teeth 70 of the groove cutting shaft 66 are released from contact with the raised portion of the groove cutting cylinder 68, allowing the groove cutting shaft 66 to be moved axially and engaged with the groove cutting cylinder 68, with the teeth 70 engaging with the inner groove 72, and the fixing device 50 is moved from the fixed position shown in Figures 3 and 5 to the open position shown in Figure 3. This allows relative axial movement between the first fixing means 62 and the second fixing means 64, i.e., between the groove cutting shaft 66 and the groove cutting cylinder 68, allowing the groove cutting shaft 66 to be moved from the fixed position shown in Figure 3 to the open position shown in Figure 4. By moving the fixing device 50 to the fixed position shown in Figure 3 and fixing the gripping heads 48 in the extended position shown in Figure 3, the winding core 30 can be held in a fixed position between the two gripping heads 48.

[0048] When the gripping heads 48 and the locking devices 50 are moved from the extended position shown in Fig. 3 and the locking devices 50 in the fixed position to the retracted position and the released position shown in Fig. 4, the winding core 30 is positioned in front of and coaxial with the gripping heads 48 between the first gripping device 42 and the second gripping device 44. Then, the second actuator 54 is actuated to apply a force to the gripping heads 48 in the axial direction A, moving the gripping heads 48 toward the winding core 30, allowing both gripping heads 48 located near both ends of the winding core 30 to engage with both ends of the winding core 30. The second actuator 54 applies a pressing force (moving force) of 20 kN or more and up to 25 kN to the gripping heads 48, thereby fixing the winding core 30 between the gripping heads 48.

[0049] A conical engagement surface 60 formed on the outer periphery of the gripping head 48 allows the gripping head 48 to achieve an extended position that centers the winding core 30 relative to the gripping head 48 and the cylinder 56. When the gripping head 48 is moved axially, the first fixing means 62 and the grooved shaft 66 also move axially, moving the second fixing means 64, i.e., the grooved cylinder 68, to the extended position. Due to the weight of the winding core 30, the second actuator 54 generates the necessary pressing force to hold the gripping head 48 in the extended position.

[0050] 3, the gripping head 48 can be held in the extended position. When the first actuator 52 is actuated, the second locking means 64, i.e., the groove machining cylinder 68, connected to the first actuator 52, rotates relative to the first locking means 62, i.e., the groove machining shaft 66. In other words, the first actuator 52 applies torque to the groove machining cylinder 68, rotating the groove machining cylinder 68 relative to the groove machining shaft 66. In the illustrated embodiment, the rotation angle of the second locking means 64, i.e., the groove machining cylinder 68, is approximately 30°. This allows the teeth 70 of the groove machining shaft 66, which are engaged with the inner groove 72 of the groove machining cylinder 68, to be disengaged by actuation of the second actuator 54.

[0051] Next, when an axial pressing force is applied to the other of the first gripping device 42 and the second gripping device 44, for example, the first gripping device 42 on the opposite side of the winding core 30, an axial pressing force in the direction of the grooved cylinder 68 is applied to the gripping head 48, pressing the first fixing means 62 and the grooved shaft 66. As a result, the grooved shaft 66 moves toward the grooved cylinder 68, coming into contact with the raised portion of the inner groove 72 and preventing the grooved shaft 66 from sliding toward the grooved cylinder 68.

[0052] The grooved shaft 66 is supported axially on the grooved cylinder 68, and the gripping head 48 is supported on the grooved cylinder 68 so that the gripping head 48 is fixed in the extended position. The fixing device 50 absorbs a gripping force on the gripping head 48 of at least 25 kN to 30 kN. The flats or ridges on the teeth 70 increase the tension on the winding core 30 and the gripping head 48, improving stability.

[0053] In this way, the winding core 30 and the gripping head 48 are securely fixed between the first fixing means 62 and the second fixing means 64, preventing the gripping head 48 from moving back from the extended position shown in Figure 3 to the retracted position shown in Figure 4. The fixing device 50 constitutes a fixed fastener for the gripping head 48, and therefore the gripping head 48 can be reliably held in the extended position without the need for a constant positive pressure, for example, by a second actuator 54 such as a spring. This allows the provision of a particularly reliable, problem-free and space-saving first gripping device 42.

[0054] The first gripping device 42 is provided on the winding device 24 as a structure for gripping the winding core 30 of the second roller 38. In either case, one first gripping device 42 and one second gripping device 44 form multiple winding spaces 40 for the winding core 30, and the gripping heads 48 of the first gripping device 42 and the second gripping device 44 that form the same winding space 40 are supported coaxially.

[0055] The first gripping device 42 and the second gripping device 44 are rotatably arranged within the winding space 40, and the winding core 30 arranged within the winding space 40 is held by the gripping heads 48 of the first gripping device 42 and the second gripping device 44. At the same time, the gripping heads 48, which are movable axially relative to the winding core 30, are moved toward and away from each other, so there is no need to move the winding core 30 axially, and the winding core 30 can be moved back and forth freely within the winding space 40. In particular, when using a winding core 30 for winding and packaging a strip-shaped material B, there is no need to move the winding core 30 axially.

[0056] Figure 8 shows a second gripping device 44 according to another embodiment of the present invention. The second gripping device 44 of Figure 8 includes an axially adjustable gripping head 48 and a cylindrical body 56 that is attached to the second roller 38 and passes through the second roller 38. The second gripping device 44 includes a hydraulic cylinder 78 and a piston rod 80 that is attached to the hydraulic cylinder 78 and biased by a spring device 76. A fastener 82 on the hydraulic cylinder 78 holds the piston rod 80 in place.

[0057] The cylinder 56 connected to the piston 80 and the gripping head 48 can be adjusted axially by a hydraulic cylinder 78 of the gripping device 44. By operating the hydraulic cylinder 78, the gripping head 48 can be moved into the winding core 30 to grip the winding core 30.

[0058] After the gripping head 48 has been moved completely into the winding core 30, the hydraulic cylinder 78 can be kept activated to press the spring device 76 against the pressing force of the cylinder 56 or against the mounting of the cylinder 56 to grip the cylinder 56. Once the spring device 76 achieves the pressing force, the clamping tool 82 can be activated to lock the piston rod 80 in place. The hydraulic cylinder 78 can then be de-energized to maintain the gripping force on the cylinder 56 and gripping head 48 via the spring device 76.

[0059] The gripping device 44 according to the second embodiment of the present invention, which uses a spring device 76 that does not form a fixed fastener, does not include a fixing device 50 that forms a fixed fastener for the gripping head 48. The spring device 76, which actively generates a pressing force at all times, holds the gripping head 48 in the extended position, and the axial pressing force required for transmitting torque can be maintained by the connecting structure between the conical engagement surface (tapered locking portion, tapered pin) 60 of the gripping head 48 and the winding core 30.

[0060] When the conical engagement surface 60 of the gripping head 48 is moved completely into the winding core 30, the gripping head 48 can transmit torque into the winding core 30. For example, the winding core 30 can be rotated by a prime mover 84 such as an electric motor. After connecting the prime mover 84 in a non-rotating state to the gripping head 48, the gripping head 48 can be set to a rotating state, thereby setting the winding core 30 connected to the gripping head 48 to a rotating state. For example, the gripping head 48 can be rotatably mounted on the cylindrical body 56, and the winding core 30 of the first embodiment can be rotated.

Claims

1. A fixing device (50) for fixing a winding core (30) comprising a base (46), a gripping head (48), and a fixing device (50), The locking device (50) is adjustable between a locked position and an open position; The gripping head (48) is axially movable relative to the base (46) between an extended position and a retracted position; The locking device (50) in the locked position locks the gripping head (48) in the extended position to form a fixed fastener for the gripping head (48).

2. the fixing device (50) fixes the gripping head (48) in the extended position with a maximum gripping force of at least 25 kN to 30 kN; 2. The fixing device according to claim 1, wherein the fixing device (50) securely fixes the gripping head (48) in a fixed position while the gripping head (48) moves in the axial direction (A) between the extended position and the retracted position, and / or the axial protruding length of the gripping head (48) in the fixed position is longer than that in the open position.

3. 2. The locking device of claim 1, wherein the length between the locked and released positions is equal to the axial travel of the gripping head (48) between the extended and retracted positions.

4. 2. The fixing device according to claim 1, wherein the fixing device (50) in the fixed position comprises first fixing means (62) and second fixing means (64) connected to each other in the axial direction (A).

5. 5. A fixing device according to claim 4, wherein the first fixing means (62) in the fixed position rests axially on the second fixing means (64).

6. 5. The fixing device according to claim 4, wherein the first fixing means (62) is a grooved shaft (66) and the second fixing means (64) is a grooved cylinder (68), or the first fixing means (62) is a grooved cylinder (68) and the second fixing means (64) is a grooved shaft (66), and the grooved shaft (66) and the grooved cylinder (68) are engaged with each other in the fixed position.

7. 5. A fixing device according to claim 4, wherein the first fixing means (62) is fixed in the axial direction (A) on the gripping head (48) and / or is connected in a non-rotating manner to the gripping head (48) and / or the second fixing means (64) rests in the axial direction (A) on the base body (46).

8. 2. The fixing device of claim 1, wherein the fixing device (42, 44) comprises a cylindrical body (56) to which the gripping head (48) is fixed, the cylindrical body (56) passing through the fixing device (50).

9. 2. The locking device of claim 1, wherein the locking device (42, 44) includes a first actuator (52) for actuating and adjusting the locking device (50) between the locked and released positions.

10. 10. The fixing device according to claim 9, wherein the first actuator (52) is connected to the first fixing means (62) or the second fixing means (64) to apply a torque to the corresponding first fixing means (62) or second fixing means (64).

11. 2. The fixing device according to claim 1, wherein the fixing device (42, 44) comprises a second actuator (54) connected to the gripping head (48) for applying a moving force in the axial direction (A) to the gripping head (48).

12. 2. The fixing device of claim 1, wherein the gripping head (48) has a tapered locking portion (60).

13. A winding device for winding and unwinding a flat strip-shaped material (B) comprising a support (28) having at least one winding space (40) of a winding core (30), At least one winding space (40) includes a first gripping device (42) and a second gripping device (44); A winding device, characterized in that at least the first gripping device (42) is a gripping device (42) according to any one of claims 1 to 12.

14. 14. A winding device according to claim 13, wherein the winding device (24) comprises at least one winding core (30).

15. 14. The fixation device according to claim 13, wherein the second gripping device (44) is a gripping device (44) with an axially adjustable gripping head.

16. The support (28) has at least two opposing rollers (36, 38), At least the gripping head (48) and the fixing device (50) of the first gripping device (42) are attached to a first roller (36) of the plurality of rollers (36, 38); 14. The fixing device according to claim 13, wherein at least the gripping head (48) of the second gripping device (44) is attached to a second wheel (38) of the plurality of wheels (36, 38).

17. 17. A fixing device according to claim 16, wherein the support (28) has at least two winding spaces (40).

18. At least the gripping head (48) and the fixing device (50) of the first gripping device (42) of the winding space (40) are attached to the first roller (36); 18. A fixing device according to claim 17, wherein the gripping head (48) of the second gripping device (44) of the winding space (40) is attached to the second roller (38).

19. 14. The fastening device according to claim 13, wherein the first gripping device (42) is arranged on the operator side of the winding device (24) and / or the base body (46) is fixed to and / or forms part of the support (28).

20. An apparatus for producing a strip-shaped material (B) comprising a winding device (24) according to claim 13.

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