DE3822572C2 - - Google Patents

Description

The invention relates to an unwinder for winding rolls made of sheet material, in particular Paper web, according to the preamble of claim 1.

In a known device of this type (DE-PS 34 02 582) is the first to have the winding roll holder send trolleys movable on a lifting platform. These is with the interposition of the lifting device on the supported second car, the one on a fixed track is movable. To align the ends of the wraps can roll open the center opening with the clamping pin the winding roller mounted vertically on the winding roller carrier direction, parallel to the chucking pin axis and perpendicular be adjusted for this. The alignment process takes place by hand by an operator, what time and is labor intensive. If you want the process to be automated by choosing the desired location based on a previous determined measurement of the winding roll data trouble if the winding roll circumference is not cylindrical, but conical and / or the sleeve is not is exactly centered on the circumference of the winding roll, as is often the case in practice.  

It is therefore already known (prospectus "Cerutti's new robot-driven photogravure presses "), in a separate Position using conical sensors of the sleeve ends and possible deviations from the setpoint by motorized displacement of the winding roll to eliminate. Here, the winding reel carrier can the lifting, longitudinal and transverse movement also a swivel Carry out movement around a vertical axis of rotation. These Measuring station requires additional space and requires one sensitive and therefore expensive special measuring device.

In another known unwinding device (US-PS 28 37 295) conical clamping pins are used which against each other by hydraulic piston-cylinder arrangements be pressed. The winding roll rests on one Winding roll holder that is fixed with a vertically adjustable cash carrier is connected. After lowering the turned on tensioned winding roll is parallel to the winding rolls displaceable to an off-center feeding of the Compensate web.

With another unwinding device (AT-PS 3 82 588) conical clamping pins are also provided. During the engagement of the clamping pins, the winding is at rest roll on the conveyor rollers of a conveyor that in turn movable in the direction of the chucking pin axis is. The winding rolls are made up of one winding roll drive driven. At the beginning there is a measurement the winding roll dimensions and then such a tax tion that the winding roll is in the right place for inserting the clamping pin.  

Then there is an unwinding device (DE-OS 37 31 488) with conical clamping pins, where the winding rollers Height adjustable by means of a joint mechanism and is parallel to the clamping pin by means of a carriage axis can be moved. For this purpose he is connected with a tension control chain, via which an ent speaking drive takes place. Here is a rough construction direction based on a previous measurement of the winding roll data and then fine-tune with the help an optical sensor, the measuring section through which Sleeve of the winding roll goes.

Furthermore, an unwinding device is known (DE-OS 26 31 355), in which the winding reel carrier by a verti kale axis of rotation is pivotable. That way the winding roll in an axially parallel position to the on are brought into the spigot, so that these then in the Sleeve ends can be inserted.

The invention has for its object a winding roll len unwinding device of the type described above specify an automatic alignment process under Taking into account the actual position of the sleeve ends, but without a separate measuring station.

This object is achieved by the features of claim 1 solved.

If the clamping pins are moved against each other, they grip with their tapered end sections into the center openings formed by the sleeve ends and exert forces in the event of deviations from the central position out because of the free mobility of the winding rolls carrier to a displacement of the winding roll in the  Horizontal plane leads until the sleeve ends are centered have set to the chucking spigot. With this "To beak "results in an alignment in the horizontal level where no motors and therefore no rule circles are required for the motor control. Much more is the winding roll holder of the horizontal drives separated. Overall, therefore, when inserting an automatic alignment of the sleeve with the instep tap. This exact alignment in the horizontal plane takes place quickly and without constraints. It will also no additional space for a measuring station compelled.

Claim 2 describes a particularly simple design form.

The one-way clutch according to claim 3 enables detach the winding roll from the drive.

In the alternative according to claim 4, the gas upholstery, especially an air cushion, a supportive Surface that is sufficient for the alignment process allows large movement relative to the lower support.

Due to the configuration according to claim 5, the Alignment in the horizontal plane of the clamping pins mass to be moved kept small. Because lifting device and lifting frame do not take part in the relocation movement part.

The same also applies to the configuration according to claim 6 Advantage of the small moving mass. Because the one with the Lift frame firmly connected parts take on the Relocation not part.  

In the arrangement according to claim 7, the mass of the feeder to be displaced at first Wagons and an associated railway section.

The training according to claim 8 is for alignment the sleeve ends are provided in the vertical direction. The tapered end sections practice with a position deviation chung the sleeve in the vertical direction a corresponding Force on the winding reel, causing a change of the signal of the force measuring device on the correspond leads the page. With one-sided stroke adjustment the corresponding sleeve end can be adjusted so far until the force measuring device is at the correct altitude shows the original value again.

The force measuring device according to claim 9 allows one very simple measurement.

The type of actuation of the lifting elements according to claim 10 results in a particularly quick overall alignment.

The winding roll diameter measuring device according to claim 11 is relatively simple, but with conical winding rolls and eccentrically arranged sleeves are unusable per se. But it can be used because of the rough alignment followed by a fine alignment.

In the training according to claim 12, the force measuring devices also used to lose weight a winding roller pulling out the clamping pin auto initiate matically.

If claim 13 is applied, the rest can also be used small diameter winding rolls from the unwind remove direction. They then roll over the sloping surface on the winding roll carrier.  

Claims 14 and 15 deal with others favorable embodiments.

The invention is based on a in the drawing tion shown preferred embodiment explained in more detail. It shows

Fig. 1 is a schematic side view of a modern fiction, unwinding device with in-position of the input winding roll,

Fig. 2 is a plan view of the feeder of Fig. 1,

Fig. 3 is a side view similar to Fig. 1 of an embodiment with abgewan punched in-transfer position winding roll,

Fig. 4 is a partial view of the feeder with spanned residual winding roll,

Fig. 5 shows the arrangement way clutches in a functional image of free,

Fig. 6 shows an embodiment of a force measuring device,

Fig. 7 is a plan view of the winding roll with a clamping pin ready for insertion into the sleeve,

Fig. 8 is a plan view of the winding roll with a horizontal parallel displacement,

Fig. 9 is a plan view of the winding roll with rotation about a vertical axis,

Fig. 10 is a front view of a conical winding roll before alignment,

Fig. 11 is a front view of the conical winding roller after alignment and

Fig. 12 is a front view of a residual winding roll when removing.

Referring to FIGS. 1 and 2, a bobbin carrier 1 is provided for feeding a wrapping roller 2. The winding roll carrier is formed by the troughed surface of a first carriage 3 , that is to say a trough carriage, which can be moved with its wheels 4 by motor on a first track 5 , in particular a rail track. This track has fixed sections 5 a and 5 b and a movable section 5 c on a second carriage 6 , a so-called loading carriage. This is moto rically movable with its wheels 7 on a second track 8 , in particular in turn a rail track. This consists of a section 8 a on a lifting frame 9 and a section 8 b on a pivoting element 10 which can be pivoted by means of a swivel bearing 11 about a vertical axis 12 on the lifting frame 9 and locked in its central position. The lifting frame 9 is supported at its four corners on four Hubele elements 13 to 16 , which are arranged in a stationary manner and can each consist of a hydraulic piston-cylinder unit.

The unwinding device has a frame 17 , on each of which a rotary star 18 or 19 is rotatably mounted about an axis 20 . Each rotary star 18 has two arms 21 and 22 , each of which has a clamping pin 23 or 24 for engagement in the sleeve end 25 of a winding roll 2 . In Fig. 1, the winding roll 2 a, from which a paper web 26 is withdrawn, is almost used up. Therefore, a new winding roll 2 is fed to the clamping pin 23 . The new winding roll 2 is then brought into the working position by rotating the rotating stars 18, 19 by 180 °.

The winding roll carrier 1 can therefore be moved in several ways relative to the tensioning pins 23 in the receiving position:

• a) With the help of the lifting elements 13 to 16 there is a vertical displacement S 1 .
• b) With the help of the first carriage 1 there is a displacement S 2 parallel to the clamping pin axis.
• c) With the help of the second carriage 6 there is a movement S 3 perpendicular to the clamping pin axis.
• d) With the aid of the swivel element 10 , there is a rotational movement S 4 about the vertical axis 12 below the clamping pin 23 located in the receiving position.

As will be explained in more detail later, the sleeve ends 25 of a winding tube 43 are exploited using these four possibilities of movement in such a way with the clamping pin 23 that the roller 2 is securely received by the clamping pin, as is illustrated in Fig. 3.

In the embodiment of Fig. 3 the web portion 5 rests c for the first carriage 3 with the interposition of a gas cushion 110 or air cushion on the second carriage 6. The lifting frame 9 does not require a swivel element 10 because the gas cushion 110 allows movement in the directions S 1 , S 2 and S 3 .

To remove the respective residual winding roll 2 b of the Wickelrollenträ ger 1 is motor-driven under this residual winding roll and to contact raised. Then the clamping pins 23 and 24 are removed and the residual winding roll 2 b can be removed on the first carriage 3 . If the diameter of the remaining roll roll 2 b is smaller than the width of the arms 21 , 22 , it is received on a remaining winding roll receiving surface 27 of the second carriage 6 and held in place by means of a clamp 28 when the clamping pins 23 and 24 are pulled out. The receiving surface 27 has a slight inclination of example 2 °, so that the residual winding roll 2 b can roll under its own weight on the roll carrier 1 , ie the surface of the first carriage 3 . On the opposite side of this first carriage 3 there is a winder stop device 29 which can be folded up if necessary.

Fig. 5 shows schematically that the carriages 3 and 6 are each provided with a drive motor 30 and 31 , which is connected to the associated carriage via a switchable one-way clutch 32 and 33 , respectively. The clamping pins 23 and 24 have their own drive 34 . Whenever a command from a control device 35 is sent to the drive 34 to push the clamping pin 23 or 24 into a sleeve end 25 , a switching command is sent to the one-way clutches 32 and 33 at the same time, as a result of which they are switched to free-running. While the carriages 3 and 6 are normally forcibly moved to certain coordinates by their motors 30 and 31 , they are separated from their motors after the switching command.

In the embodiment of Fig. 3, the freewheel 32 and 33 omitted couplings. Instead, there is an unillustrated locking device for the web section 5 c, which can be fixed, for example, with locking pins on the second carriage 6 . This locking device is released approximately simultaneously with the insertion of the clamping pin 23 or 24 , so that the web section 5 c is movable in all three horizontal degrees of freedom on the gas cushion 110 .

Fig. 2 shows that two opposing wheels 7 of the second carriage 6 each have a Kraftmeßeinrich device 36 and 37 is assigned. The corresponding arrangement is explained in more detail in FIG. 6. The axis 38 of the wheel 7 is articulated to a cover plate 39 of the carriage 6 . This cover plate also carries the Kraftmeßein direction 36 , for example a conventional pressure cell. It is loaded by the axis 38 via a plunger 40 . The force measuring device 36 therefore determines the wheel load of the second carriage 6 .

As shown in FIG. 7, the clamping pins 23 and 24 have tapered end sections 41 , which form an angle of 10 to 45 °, preferably about 40 °, with the clamping pin axis 42 . If the roughly aligned clamping pin 23 is now pushed in with a force P 1 , the end section 41 abuts the end 25 of the winding tube 43 , a force P 2 being generated transversely to the feed direction. This force is used to effect the fine alignment of the winding tube 43 .

The winding roll 1 can move freely in the horizontal direction because there is a possibility of free running in all degrees of freedom of movement. According to Fig. 8 act on both ends of the winding sleeve 25 forces P 2, which are rectified. The winding roll 1 moves with displacement of the second carriage 6 in the direction S 3 perpendicular to the tensioning pin axis 42 . In Fig. 9 act on both ends of the winding sleeve 25 forces P 2, which are opposite to each other. This leads to a rotation of the swivel element 10 in the direction of the arrow S 4 . Movement parallel to the clamping pin axis 42 by displacement of the first carriage 3 is possible, namely if one clamping pin 23 touches the associated winding tube end 25 earlier than the other clamping pin. The insertion forces normally exerted on the clamping pins are sufficient for these alignment processes on the horizontal plane.

If there is a vertical deviation, the forces P 2 are vertical. They therefore act against or with the weight of the winding roll. These force changes are measured with the aid of force measuring devices 36 and 37 , of which at least one is provided on each side. According to Fig. 10 results in a force reduction to the left and right F- an increase in force F +. This leads to a force difference, which must be eliminated by adjusting the lifting devices 13 , 14 on the one hand and 15, 16 on the other hand. In the case of Fig. 10, the lifting frame 9 must be raised on the left side and lowered abge on the right side, so that the conical shape of the winding roller 1 is carried out and a precise alignment of the clamping pins 23 and 24 is achieved with the winding tube 43 . The lifting devices 13 to 16 are each actuated until the vertical changes are eliminated. As soon as the force measuring devices 36, 37 indicate that the additional vertical force components are no longer present, the clamping pins 23 or 24 can be pneumatically inserted into the winding tube 43 with normal operating pressure.

Fig. 12 shows that the force measuring devices 36 and 37 can also be used for removing a residual winding roll 2 b. If the lifting frame 9 is moved vertically upwards and the winding roll carrier 1 contacts the remaining winding roll 2 b, additional force components are measured. If these exceed a desired value 44 , the associated comparator 45 sends a signal to the drive 34 for the clamping pin 23 or 24 in order to pull it out of the winding tube 43 .

In operation, the procedure is as follows: A new roll of paper roll 2 is fed with the help of the first carriage 3 via the web section 5 a and on the web section 5 c of the second carriage 6 up to the center of the unwinding device, with an alignment with a permissible There is a deviation of +/- 10 mm. Then the roll diameter is determined using a measuring device 46 . Then the second carriage 6 is driven under the clamping pin located in the receiving position 23 and adjusted roughly in height with the aid of the lifting elements 13 to 16 on the basis of the diameter determined. Both movements can be carried out at high speed. Then the clamping pins are pushed forward, the clutches 32 and 33 are switched to freewheeling and the swivel segment is unlocked. Due to the tapering end portions of the clamping pins 23 and 24 , 25 forces are exerted on the winding tube ends, which leads directly to a displacement of the winding roller 2 in the horizontal plane and to a corresponding actuation of the lifting device in the vertical plane until the winding tube ends 25 are aligned so precisely are that the clamping pins can be retracted with normal operating pressure. Then the winding roll 2 is slightly raised by the rotary star 18, 19 so that the winding roll support 1 can be moved back again. The winding roll 1 is then prepared so that it can take up the working position if necessary.

To remove the residual winding roll 26 , the winding roll carrier 1 is moved under the residual winding roll. Then it is raised until the force measuring devices 36 , 37 report the contact. Then the clamping pins 23 and 24 are pulled out and the residual winding roll 2 b is removed on the first carriage 3 . Of course, the touch of the remaining roll can also be determined in other ways, for example by a push button switch.

The embodiments shown can be varied in many ways without departing from the basic idea of the invention. For example, the vertical pivot axis 12 can also be arranged on one side of the lifting frame 9 . The stroke can be adjusted by an electric motor or mechanically. Other known load cells, for example with strain gauges, can also be used instead of the pressure load cells. The carriages that can be moved on wheels can also be formed by slides or other supports that can be moved on runners.

Claims (15)

1. Unwinding device for winding rolls made of web-like material, in particular paper web, with two clamping pins that can be displaced by a drive against one another for engaging in a central opening of the winding roll and with a winding roll carrier that feeds the winding rolls, which is adjustable in height by means of a lifting device and in parallel by means of a first carriage to the clamping pin axis and by means of a second carriage perpendicular to the clamping pin axis, characterized in that the clamping pins ( 23, 24 ) have tapered end sections ( 41 ) and the winding roller carrier ( 1 ) when inserting the clamping pins into the central opening (sleeve 43 ) in all three horizontal degrees of freedom ( 52, 53, 54 ), namely displacement ( 52 ) parallel to the trunnion axis ( 42 ), displacement ( 53 ) perpendicular to the trunnion axis and pivoting ( 54 ) in the horizontal plane, is kept freely movable. 2. Device according to claim 1, characterized in that the winding roll carrier ( 1 ) on a pivot element ( 10 ) about a vertical axis of rotation ( 12 ) is pivotable. 3. Apparatus according to claim 1 or 2, characterized in that a one-way clutch ( 32, 33 ) is connected between the first and / or second carriage ( 3, 6 ) and the associated drive ( 30, 31 ). 4. Device according to one of claims 1 to 3, characterized in that the winding roll carrier ( 1 ) is supported on a gas cushion ( 110 ) when pushing the clamping pin ( 23, 24 ). 5. Device according to one of claims 1 to 4, characterized in that the lifting device is arranged stationary and a lifting frame ( 9 ) is adjusted in height and that the second carriage ( 6 ) frame on the hub and the first carriage ( 3 ) the second carriage is movable. 6. The device according to claim 5, characterized in that the pivoting element ( 10 ) arranged in the path of the second carriage ( 6 ) and a the axis of rotation ( 12 ) forming the bearing on the lifting frame ( 9 ) below the clamping pin located in the receiving position ( 23rd ) is arranged. 9. Device according to one of claims 4 to 6, characterized in that the gas cushion ( 110 ) is arranged on the second carriage ( 6 ) and carries a track section ( 5 c) for the first carriage ( 3 ). 8. Device according to one of claims 1 to 7, characterized in that the lifting device has at least two independently adjustable lifting elements ( 13 to 16 ) which are arranged offset in the direction of the clamping pin axis ( 42 ) and that the offset sides in the same direction A force measuring device ( 36, 37 ) is assigned to each of the winding roll carriers ( 1 ), depending on which the mutually offset lifting elements can be adjusted. 9. The device according to claim 8, characterized in that the force measuring device ( 36, 37 ) on each side consists of at least one measuring unit, each measuring a wheel load of the second carriage ( 6 ). 12. The apparatus of claim 8 or 9, characterized in that the lifting elements ( 13 to 16 ) for rough direction in rapid traverse and for fine alignment by means of the force measuring devices ( 36, 37 ) can be actuated in creep speed. 11. Device according to one of claims 1 to 10, characterized in that a winding roll diameter measuring device ( 46 ) is provided, depending on which the lifting device ( 13 to 16 ) can be actuated for height-coarse alignment. 12. The device according to any one of claims 8 to 11, characterized by a comparator ( 45 ), the force signals from the force measuring devices ( 36, 37 ) em receives and actuated when reaching an adjustable value the trunnion drive ( 34 ) in the pull-out direction. 13. The device according to one of claims 1 to 12, characterized in that on the second carriage ( 6 ) next to the web ( 5 ) for the first carriage ( 3 ) is a residual winding roll receiving surface ( 27 ) in the direction of said path is inclined and ends at the level of the winding roll carrier ( 1 ). 14. The apparatus according to claim 13, characterized in that the residual winding roll receiving surface ( 27 ) is associated with a bracket ( 28 ) for clamping the residual winding roll ( 26 ). 15. The apparatus of claim 13 or 14, characterized in that the second carriage ( 6 ) on the rest of the roll-receiving surface ( 27 ) opposite side of the web ( 5 ) for the first carriage ( 3 ) has a winding roll stop device ( 29 ) wearing.