EP1433729B1 - Bobbin changer and method for removing a roll - Google Patents

Abstract

The roller device has a first roller arm (4) with first journal (8) and a second roller arm (5) with a second journal (8) so that the journals for the rotation bearings for the track roller (10). There are also two wipers (9), one on the end of each journal. There is a drive device to turn the roller arms and move the first wiper, and a control device.

Description

The invention relates to a roll changer for a machine for processing or processing a web. A preferred example is a roll changer for a web-fed rotary printing press, especially for newspaper printing. Furthermore, the invention relates to a method for expanding a residual role.

Depending on the degree of automation, product web rolls that were used up during production, so-called residual rolls, are changed fully automatically or manually. The roll automatic change is expensive. For a manual change control elements or operating stations are arranged in known reel splicers on roller arms of the reel changer, which allow the operator to pivot, for example, the roller arms and to move apart and each other. When removing the rest of the roll by hand, the operator of a risk of injury is exposed by moving parts of the reel changer. Thus, in particular the motor-pivotable and / or linearly movable roller arms can form clamping points, for example with a machine frame, in which an operator can be clamped and thereby injured.

The U.S. Patent 4,951,894 describes a device for handling rolls of web-shaped goods. The device comprises two arms, each arm having a chuck. The chucks are aligned with each other so that a roll can be received and rotatably supported between the chucks. The arms can be moved together radially to the longitudinal direction of the roller. Further, the arms can be moved relative to each other in the longitudinal direction of the roll to Ausachsen the roll core. To Ausachsen a roll core receptacle is pivoted under the roll core, wherein initially an arm is moved axially to get out of engagement with the roll core, and then a stripper located on the other arm strips the roller core from the chuck. The roll core is then received in the roll core receptacle.

The US Laid-Open Publication 2002/0130214 A1 discloses a roll changer for rotary printing presses. The reel changer comprises two arms pivotable about an axis, each having a chuck, wherein a roll can be held between the chucks. To disengage the roll core, one arm is moved in the longitudinal direction of the roll core and on the other arm a scraper moves, which strips the roll core from the chuck.

It is an object of the invention to allow the Restrollenwechsel in a simple and inexpensive way. Preferably, however, the safety of the operator is increased in a manual removal of the residual role.

The invention relates to a reel changer of the at least two roller arms with journals for a rotary bearing of a product web roll, a drive device for the Roller arms and a control device for the drive device comprises. The roller arms are designed so that the roller mounted by them about an axis of rotation, preferably their own central longitudinal axis, rotatable and they themselves are pivotable about a pivot axis. Further, the roller arms or at least the axle pins formed by them are mutually movable toward and away from each other to accommodate a new role or ausachsen a residual role. At least one of the journals is assigned a scraper. The wiper serves to strip the roller from the associated journal and is accordingly movable relative to the associated journal. The relative movement is preferably such that the scraper is movable relative to the journal and the roller arm of the journal. Alternatively, the journal may be movable relative to the roller arm and the wiper. In principle, the relative movement can also consist in that both the axle journal and the associated wiper are movable relative to the roller arm and relative to one another. Preferably, only the wiper performs a wiping movement relative to the journal and the roller arm. The drive means is capable and coupled to the roller arm such that any of said movements can be effected by the drive means.

According to the invention, the residual roll is asymmetrically aligned by stripping it from the associated journal by means of the scraper but still being supported by the journal of the other roller arm. The stripping of the role thus takes place only on one side and in this sense asymmetric. The control device and the drive device are designed and connected with each other to effect the asymmetrical extension, preferably fully automatically without manual intervention.

The role held after the Ausachsen solely on the other journal journal can then be easily removed by hand from this journal and handled further, for example, be transported from the area of the roll changer. Until the moment in which the role is still sitting on the one journal, all movements of Rollenarmpaars are preferably carried out fully automatically by the controller controls the drive means accordingly. As soon as the to be taken role sits only on the second journal, the drive means is fixed, preferably automatically by the control device. Preferably, the control means controls the drive means so that the Rollenarmpaar automatically pivots with the roll to be removed following the establishment of a connection between the web start a new role to a running tail of the role to be taken in a convenient for removal by hand pivot position, in which is complied with according to the invention.

In preferred embodiments, at least one scraper is associated with each of the two axle journals and can be moved by means of the drive device relative to its associated axle journal, although basically only one of the axle journals must have a scraper for executing the alignment within a roller arm pair. The control device is designed so that in the presence of at least one wiper per axle journal, a single one of the wipers is individually controlled in order to carry out the wiping movement. In a preferred embodiment, the control device has at least two control modes, which are preferably programmed, but in principle can also be implemented as hardwired control processes or else mechanically or fluidically. A first control mode of the at least two modes is automatically executed by the control device for the removal of the roll by hand and the second control mode of the at least two modes is processed for a fully automatic removal. A selection between the two control modes can advantageously be selected on an operating device at the location of the roll changer. However, it can also be advantageous if it is possible to choose between the two control modes only at a central machine stand. Furthermore, it may be advantageous if manually to be taken, predictable role withdrawals are also automatically specified, for example, by the controller is programmed accordingly or contains corresponding selection commands to select between the two control modes of a higher-level machine control.

It may be further formed to a control device which the rotational drive of the web roll and / or the pivoting movement of the roller arm and / or the movement of the Roller thrust bearing on adjustment and compliance with a certain rotational speed of the roller and / or a certain pivot position of the roller arm and / or a certain displacement position of the roller thrust bearing controls.

In the first of the at least two control modes, the control means controls the drive means so that one of the axle pivots moves axially away from the other and is disengaged from the roller by that movement. The scraper associated with the moving journal is preferably moved in the opposite direction towards the face of the roll during movement of the pivot so that the moving journal can not take the roll with it and strip it from the other pivot. In principle, however, it would also be sufficient if the scraper associated with the moving axle journal is stationary in the room while the axle journal is being moved away from the other axle journal. The scraper is not moved in this case absolutely in space, but only relative to the associated journal.

In the second of the at least two control modes, the roll to be cut out is deposited with the support arms of the roll changer on the rolling carriage initially brought into the Ausachs position. With this second control mode, the control means preferably controls the drive means so that both axle pivots are moved away from each other in axially opposite directions until neither of the two axle journals supports the roller. The scrapers associated with the axle journals can be stationary in space during the movement of the axle journals and in this sense can move or be movable relative to the journals. Preferably, for the time being, the first journal is relaxed and at the same time the first scraper is extended against the roller end wall. In this case, the first axle journal is moved away from the roller with the first support arm. Thus, a stop is formed, which helps that the roll is not moved laterally. Subsequently, the second journal is relaxed and simultaneously extended the second scraper against the roller end wall. In this case, the second axle journal is moved away from the roller with the second support arm. It is also possible from the control ago, however, that the two scrapers axially moved toward each other up against the two end faces of the roller to center the roller, while the stub axles are moved apart. The axial clamping force with which the scrapers roll centering between them is generally not sufficient to hold the roll when the stub axles no longer support the roll. Therefore, once the role is no longer supported by the journals, the role is free on a below the role already positioned trolley, on which the role is then removed. If the roll is a residual roll that has not yet been used up, the transport cart preferably transports the remaining roll into a roller bearing. The remaining roll can be used up after appropriate preparation in another production.

The roll changer preferably further comprises a safety device and a detection device connected to the safety device. The detection device monitors a safety zone surrounding the roller arms in order to detect whether persons are in the safety zone. It fulfills this function either by detecting only entering and leaving the safety zone by forming a barrier. In a preferred alternative, the accessible part of the security zone is monitored instead or additionally nationwide or even covering space. The safety device changes to a blocking state if it is detected by means of the detection device that a person is staying in the safety zone. In the blocking state, it prevents at least one of said motor movements of the reel changer, preferably each movement of a reel changer part within the safety zone which can be effected by the motor by means of the drive device.

By monitoring a safety zone defined by means of the detection device, the risk of injury for persons, in particular for the operating personnel, is significantly reduced. The security zone thus becomes a secure zone.

The detection device can monitor the secured zone by means of sensors which detect mechanical effects, for example the opening and closing of an access to the safety zone and / or the entering of a surface area on the edge or within the safety zone. Preferably, however, the monitoring is carried out electromagnetically without contact. Particularly preferably, it is optically. the reel changer and a control panel with control panel, used to define the secure zone. In addition, it may also be advantageous to form a part of the border by means of a special barrier, for example by means of a grid. The non-contact barrier or the several barriers form the only parts of the boundary of the secured zone, through which persons can freely enter the secured zone.

An operating device for the drive device is preferably arranged outside the secured zone so that it can only be operated by a person located outside the secured zone. A particularly high degree of safety is achieved if a person in the secured zone is not able to access any operating elements with the aid of which one, several or all of the mentioned types of movement can or can be effected by a motor.

To increase the security even further, an operating device for the reel changer, with which preferably any, motor-driven movement of the reel changer within the secured zone can be initiated, at least one operating element for actuating the drive device and additionally a securing element. The securing element is connected to the safety device and allows only after its actuation caused by the drive means movement. As long as the securing element has not been actuated, preferably no movement within the secured zone can be effected by means of the drive device. Preferably, the security element is connected to the security device so that its blocking state is only canceled if at least the following two conditions are met: The detection device detects that each or at least one person whose stay in the secure zone has triggered the blocking state, the secured Has left zone again, and it is actuated the fuse element. In a simple embodiment, the actuation of the fuse element is sufficient alone.

The safety device and detection device is also advantageous without the inventive asymmetrical stripping of a roll to be removed, so that it the Applicant reserves the right to claim this part of the invention independently of the stripping of the roll according to the invention by way of a divisional application. Thus, in particular the blocking of movable components of a reel splitter is also advantageous for any other type of Ausachsens when operating personnel is involved in the removal and / or the removal of a somehow automatically ausgegeresten residual role. The safety device and detection device is also advantageous without a specific reference to the Ausachsen a residual role.

Figur 1

einen zugangsgesicherten Rollenwechsler,

Figur 2

eine Steuerungseinrichtung einschließlich Sicherheitseinrichtung im Zusammenwirken mit einem Rollenarm des Rollenwechslers der Figur 1,

Figur 3a-d

einen Ausachsvorgang einer Restrolle

Figur 4

einen Rollenwechsler nach dem Stand der Technik und

Figur 5

einen Scanner.

A preferred example of the invention with two different detection devices will be explained below with reference to figures. The features disclosed in the exemplary embodiment advantageously continue to form the subject of the claims individually and in every feature combination. Show it:

FIG. 1

an access-secured reel splitter,

FIG. 2

a control device including a safety device in cooperation with a roller arm of the roll changer of FIG. 1,

Figure 3a-d

a Ausachsvorgang a residual role

FIG. 4

a reel changer according to the prior art and

FIG. 5

a scanner.

FIG. 1 shows an access-secured reel changer of a web-fed rotary printing press in a plan view of a secured zone Z, which is formed around all parts of the reel splicer, which are moved by a motor and can therefore form dangerous terminal points for persons, in particular the operating personnel.

In FIG. 4, clamping points K for a reel splicer of the prior art are indicated, which with respect to its roller arms 4 ', 5', 6 'and 7' and their possibilities of movement are identical to the reel changer of FIG. 1, with the exception of the possibility of movement of Stripping, as will be explained. Clamping points K can be formed in particular by linear movements of the roller arms 4 'to 7' along a common pivot axis 3, for example between one of Roller arms 4 'to 7' and a frame 1, which supports the pivot axis 3. Such linear movements, which are indicated in Figure 4 in the two roller arms 4 'and 5' with double arrows are required when a web roll 10, for example, a residual role to be taken. Dangerous situations can arise, in particular, in that a drive device which effects the linear movements is actuated manually on operating devices 19, which are arranged directly on the roller arms, as shown by the example of the roller arms 4 'and 5'. The operator stops during the movement of the roller arm in the immediate vicinity of the relevant roller arm.

In the reel changer according to the invention of Figure 1, the secured zone Z is formed to increase personal safety, which is at least during operation of the roll changer, but preferably at any time, monitored and secured so that at least none of the roller arms 4, 5, 6 and 7 parallel to the common pivot axis 3 can be moved by means of a motor provided for the reel splicer drive means, if a person is within the secure zone Z. Although already a prevention of the movement of the roller arms 4 to 7 parallel to the pivot axis 3 significantly reduces the risk of injury, it is advantageous if a pivoting movement of the roller arms 4 to 7 caused by the drive device is likewise not possible. Even more preferably, the rotary drive of the roller 10 to be removed is prevented by the drive device. In Figure 1, both sides of the roller 10 for each of the roller arms 4 and 5 are each a rotary drive motor 11c of the drive device shown. These two motors 11c are thus preferably also blocked. In a further preferred embodiment, this also applies to scrapers 9, which are shown in FIGS. 3 a to 3 d and serve to remove the roller 10.

The roller arms 4 and 5 form a pair of roller arms, between which the web roll 10 is rotatably mounted by means of the motors 11c on journals 8. The two other roller arms 6 and 7 form another pair of roller arms for the identical storage of another role. The two pairs of roller arms are connected diametrically opposite each other torsionally rigid with a shaft forming the pivot axis 3. The shaft is rotatably mounted on both sides in the frame 1 and is used to pivot the pairs of Roller arms rotationally driven by the drive device. The roller arms 4 to 7 are mounted on the shaft individually along the pivot axis 3 linearbewegbar. The linear movement is ever effected by means of a linear drive, for example one motor for each of the roller arms 4 to 7. At the outer ends of the roller arms 4 to 7, depending on a rotary drive motor 11 c is arranged. In the case of a direct drive, the motor shafts of the motors 11c directly form the stub axles 8. Alternatively, however, the stub axles may also be rotationally driven via gears. The linear movement of at least one respective roller arm of each of the roller arm pairs is required for the removal of a residual roller 10 and also for the installation of a new roller in the illustrated arrangement of roller arms 4 to 7. In addition, it also allows the inclusion of different widths roles. Thus, the two roller arms 4 and 5 are in positions for receiving a roller 10 with maximum width, while the other two roller arms 6 and 7 are in positions where they can take a role with half the maximum width. The mechanism of the roll changer and the drive device as such requires no further explanation, since they can be formed as in conventional reel splitter of the illustrated type. Basically, this also applies to the processes in a fully automatic role change.

In Figure 1, a roller taken up by the roller arms 6 and 7 is not shown. In the position shown, the roller arms 6 and 7 runs from a new role with half the maximum width and is printed in a print production. There has been a change from a roll 10 of maximum width to a new roll of half the maximum width, as is quite common without interruption in production, to change in the print production of a national newspaper from, for example, a regional supplement to another regional supplement.

In Figure 2, the roller arm 4 is shown with acting on him components 11a to 11d of the drive device representative of the other roller arms 5, 6 and 7. The components of the drive means acting on or on the roller arm 4 are the motor 11a for the pivot drive, a motor 11b for the linear movement of the roller arm 4 parallel to the axis of rotation of the roller 10 and the pivot axis 3, the motor 11c for the rotary drive of the roller and a linear drive 11d for the scraper 9. The with help movements that can be effected by these drive components are indicated symbolically by arrows.

The drive device is controlled by a control device 12. Preferably, at least the motor 11c for the rotary drive of the roller is also controlled. The controller 12 is also preferably further developed to a control for the pivot drive 11a and more preferably also for the linear drive 11b. The linear drive 11d of the scraper 9 is preferably operated only controlled. However, the control circuits are not shown for the sake of clarity. A control unit 13 of the control device 12 is connected to the drive components 11a to 11d to allow their control and optionally control by means of actuating signals S1 for the pivot drive 11a, S2 for the linear drive 11b, S3 for the rotary drive 11c and S4 for the linear drive 11d. The control device 12 also has an operating device 20 connected to the control unit 13. At the operating device 20, the drive components 11a to 11d can be operated manually, for example, triggered or stopped a desired movement.

The control device 12 further comprises a safety device 14, which is connected to the control unit 13 for the transmission of signals. The safety device 14 may be integrated in the control unit 13. In this sense, the control unit 13, which, with the exception of their interaction with the safety device 14, as conventional controls may be formed, and the safety device 14 to the control device 12 summarized.

The safety device 14 is connected to a detection device. The detection device comprises a light receiver 15 and a light emitter 16, which form a light barrier 17 between them. As long as the receiver 15 receives the light of the transmitter 16, it gives to an input of the safety device 14, a first output signal. If the light barrier 17 is interrupted, the output signal of the receiver 15 changes, so that the safety device 14 detects the interruption.

The safety device 14 can assume at least 2 states, namely a normal state and a blocking state. In the blocking state, it gives the control unit 13 a blocking signal B, so that the control unit 13 sets one, several or all drives for the pair of roller arms 4 and 5 by means of corresponding actuating signals. If the safety device 14 assumes the normal state, it does not output such a blocking signal. In the normal state of the control unit 13, it preferably outputs a specific enable signal. If the safety device 14 has detected an interruption of the light barrier 17 on the basis of the output signal of the receiver 15 and if it is in the normal state at the moment of detection, it changes to the blocking state and outputs its blocking signal B to the control unit 13. If the light barrier 17 is interrupted once more and the safety device 14 is still in the blocking state, it retains this state. This contributes to safety, since the second interruption may mean that the person who caused the previous interruption has left the secured zone Z again, but the second interruption may also mean that another person is entering the secured zone Z. Has. Preferably, the safety device 14 no longer leaves the once assumed blocking state if one or more further interruptions are detected.

In order to be able to cancel the blocking of the drive device, an only manually operable securing element 21 is provided in the reel splitter outside the secure zone Z, preferably as part of a control panel of the operating device 20. By actuation of the fuse element 21 of the safety device 14 of the operating device 20 via a signal line a Deblockiersignal D abandoned. Due to the deblocking signal D, the safety device 14 is reset from the blocking state to the normal state and then gives the control unit 13 the enable signal F. If the release signal F is present at the corresponding input of the control unit 13, then the drive device can be manually operated again by means of the operating device 20 via the control unit 13. Likewise, the control unit 13 can automatically process its own control program or a machine control program which may be predetermined by a higher-level machine control.

As long as the control unit 13 receives the release signal F from the safety device 14, it controls the drive components 11a to 11d in accordance with a predetermined control program or according to specifications from the operating device 20. However, if the control unit 13 receives the blocking signal B from the safety device 14, the linear drive becomes 11b set by means of a corresponding actuating signal S2 until the control unit 13 again receives the enable signal F from the safety device 14. Preferably, further of the drive components 11a and 11d, particularly preferably all drive components 11a to 11d in the presence of the blocking signal B by output of corresponding actuating signals S1 and / or S3 and / or S4 set.

On the basis of a preferred embodiment has been described above, the blocking of the drive means with respect to movements of the roller arms 4 and 5, from which the roller 10 can be seen by the output of corresponding actuating signals S1 to S4. However, the safety device could instead of the control unit 13 directly on one or more of the drive components 11a to 11d act by their power supply, in the case of electric motors whose power supply, interrupts and optionally actuates existing brakes. It would also be conceivable to interrupt any existing power transmission lines to the moving parts of the roll changer or the individual roller arms, for example by coupling and uncoupling operations. The action by means of actuating signals of the control device 12 for the drive device represents only one embodiment, although a preferred.

As can be seen in the plan view of FIG. 1, "natural" obstacles are used on site to delimit the secured zone Z. Such natural obstacles are formed by parts of the frame 1, a control cabinet 12 containing control cabinet and building pillars 2. In addition, mechanical barriers in the form of grids G or the like may be provided which prevent access to the secured zone Z in the areas concerned. In the exemplary embodiment, two access options are formed on the sides of the roller arms 4 and 5, each formed by a plurality of transmitter 16 and receiver 15, at least to prevent a Person without being careful to enter the secured zone Z unnoticed. Deliberate attempts to circumvent the surveillance system may be disregarded for purposes of the invention.

The safety device 14 and the detection device can also be made more complex, not only to determine that the secured zone Z has been entered, but also to determine, for example, the number of persons currently in the secure zone Z. For this purpose, the secured zone Z could be space-covering or at least comprehensively monitored with suitable sensors.

An example of a nationwide monitoring is shown in FIG. In this example, the detection device comprises a scanner 18, which scans a scan area around itself and thus also forms it first. The scanner 18 includes a radiator for emitting rays and a receiver for receiving reflected rays. In the exemplary embodiment, the scanner 18 forms around its radiator a scanning range of more than 180 °. The lateral resolution of the scanner is 0.36 °, i. it forms more than 500 sectors in its radiation plane. The scanner 18 may form the secure zone Z alone, in combination with other such scanners 18 and / or in combination with the access barrier already described. The scanner 18 can interact with the safety device 14 like the entry barrier described. So he would give up the first output signal, in particular to the input of the safety device 14, as long as its scan area is free. However, if its scan area is disturbed, its output signal changes, so that the safety device 14 detects the fault and changes to the blocking state. Although the scanner 18 is advantageously adapted to determine the number of people who are currently in the secure zone Z. However, with his help, in preferred simple embodiments, it is also only determined whether there is even a person in the secure zone Z at all.

FIGS. 3 a to 3d show the sequence of an off-axis operation of the roller 10 in the event that the roller 10 is to be removed by hand from the roll changer by operating personnel.

In Figure 3a, the remaining roll 10 is mounted between the roller arms 4 and 5 on the two journal 8 of the roller arms 4 and 5 axially between the two scrapers 9. The axle 8 are formed by the motor shafts of the rotary actuators 11c. Each of the axle 8 is assigned a scraper 9 each. Each of the scrapers 9 can be moved back and forth along its associated axle 8 by means of its linear drive 11d.

FIG. 3 b still shows the same residual roll 10 on both axle journals 8. However, the right-hand roller arm 4 and thus also its axle journals 8 have been moved away from the opposite roller arm 5. At the same time, the wiper 9 has been moved for the axle 8 of the right roller arm 4 by the same route as the roller arm 4 but in the opposite direction relative to the axle 8, so that the residual roller 10 has not changed its position in space.

FIG. 3c shows the moment in which the axle journal 8 of the right-hand roller arm 4 has been completely extended out of the remaining roller 10. At the same time its scraper 9 was advanced to the front free end of the journal 8 of the right roller arm 4, possibly also a bit far beyond. At this moment, the residual role 10 is only stored on the journal 8 of the left roller arm 4. The left roller arm 5 and its scrapers 9 have not moved during the now completed Ausachsvorgangs. Accordingly, during the Ausachsvorgangs the scraper 9 has been moved for the journal 8 of the right roller arm 4 relative to the axle 8 so that it stood still together with the rest of the roll 10 in space during the previously completed Ausachsvorgangs. The rest of the roll 10 is mounted at this moment on the journal 8 of the left roller arm 5 and still pushes against the scraper 9 of the right roller arm 4, so that it still remains in the horizontal position shown in Figure 3c.

In Figure 3d, the situation after completion of the complete Ausachsvorgangs is shown. Compared to the position of Figure 3c, the right roller arm 4 has been again moved away from the left roller arm 5 and along with it the right scraper 9, so that the rest of the roller 10 of the scraper 9 of the right roller arm 4 is free and only is still held on the journal 8 of the left roller arm 5. From this results in the slightly inclined in Figure 3d position of the remaining roll 10. The remaining roll 10 can be very easily deducted in this position by the operator by hand from the journal 8 of the left roller arm 5 and stored for example on a trolley.

It is clear that in the Ausachsvorgang not necessarily one of the two involved roller arms must be stopped. The Ausachsvorgang can also be done by a coordinated movement of both roller arms 4 and 5 and correspondingly coordinated movements of the scrapers 9. However, the illustrated sequence is preferred for the off-axis for the purpose of removing the residual roll 10 by hand.

The procedure for a manual removal of the roll in the event of a roll change or merely the removal for example for maintenance or set-up work is as follows:

After a new role, for example, a role with half maximum width between the roller arms 6 and 7 has been used and "sharpened" for subsequent bonding, the two Rollenarmpaare 4, 5 and 6, 7 are pivoted about the pivot axis 3 and thereby the adhesive bond made between the expiring end of the remaining roll 10 and the web start of the new role. The pivoting process is only completed when the residual roll 10 to be removed is in a convenient position for removal by hand position. The remaining roll 10 is in this pivotal position either in accordance with a corresponding program control or due to a manual input to the operating device 19 in the manner described with reference to the figures 3a to 3d complimented manner. Up to the unilateral Ausachsen of the remaining roll 10, as shown in Figure 3d, all movements of the roll changer were effected by means of the drive means automatically with operating intervention or fully automatically without any operating intervention. Optionally, the Ausachsvorgang preliminary operation or the phases described individually initiating operations on the control device 19 may be required, although the unilateral Ausachsen preferably fully automatically expires and also automatically adjoins the roll change and the pivoting in the Ausachsposition.

After the removal of the axles, the operator enters the secured zone Z in order to remove the remaining roll 10 from the single axle journal 8 still carrying it. The interruption of the light barrier 17 caused by access to the secure zone Z or interference with the scan area of the scanner 18 is detected and registered by the security device 14. To the control unit 13, a blocking signal B is output. From the control device 12, the drive components are blocked and thereby the pivot drive 11a, the two linear drives 11b for the roller arms 4 and 5, the two rotary actuators 11c of the roller arms 4 and 5 and the linear drives 11d set for the scrapers 9 of the roller arms 4 and 5. There are therefore no motor movements in the driven by these drive components reel changer parts, as long as people are in the secure zone Z. When the operator leaves the secured zone Z again, it resets the safety device 14 by actuation of the securing element 21, so that the safety device 14 of the control unit 13 gives up the release signal.

By the stripped residual role due to the asymmetric stripping without tools, especially mechanical aids from which they still bearing, single journal can be removed manually, a particularly inexpensive way of removing residual roll is created. Thus, no hoist has to be provided, controlled and monitored for the residual roll removal according to the invention.

Reference numerals:

1

frame

2

pillar

3

swivel axis

4

roller arm

5

roller arm

6

roller arm

7

roller arm

8th

journal

9

scraper

10

Web roll, rest roll

11a

Part-turn actuator, motor

11b

Linear drive roller arm, motor

11c

Rotary drive, engine

11d

Linear drive wiper, motor

12

control device

13

control unit

14

safety device

15

receiver

16

transmitter

17

photocell

18

Detection device, scanner

19

operating device

20

operating device

21

fuse element

Z

Secured zone

B

blocking signal

D

Deblockiersignal

G

grid

S1

Control signal rotary actuator

S2

Actuator signal Linear drive Roller arm

S2

Actuating signal rotary drive

S2

Actuator signal linear drive wiper

Claims (18)

1. A reel changer for a web-treating or web-processing machine, preferably for a roller rotary printing machine, said reel changer comprising:

   a) a first reel arm (4) comprising a first axle journal (8), and a second reel arm (5) comprising a second axle journal (8), wherein the axle journals (8) form a rotary mount for a web reel (10) taken up between the reel arms (4, 5);

   b) a first stripper (9) which is assigned to the first axle journal (8) and can be moved relative to the first axle journal (8), in order to strip the web reel (10) from the first axle journal (8);

   c) a drive means (11a-11d) for moving the first stripper (9); and

   d) a control means (12);
   characterised in that

   e) the second reel arm (5) can be pivoted about a pivot axis (3) together with the first reel arm (4), and the drive means (11a-11d) serves to pivot the reel arms (4, 5);

   f) and in that the control means (12) controls the drive means (11a-11d) for manually removing the web reel (10), such that the web reel (10) mounted on the axle journals (8) is stripped by means of the first stripper (9) from the first axle journal (8), while the web reel (10) remains on the second axle journal (8).
2. The reel changer according to the preceding claim, characterised in that a second stripper (9) is assigned to the second axle journal (8) and can be moved relative to the second axle journal (8) by means of the drive means (11a-11d), in order to strip the web reel (10) from the second axle journal (8).
3. The reel changer according to the preceding claim, characterised in that the strippers (9) can be moved towards each other by means of the control means (12) and the drive means (11a-11d), in order to automatically strip the web reel (10) from both axle journals (8).
4. The reel changer according to the preceding claim, characterised in that the control means (12) controls the drive means (11a-11d) for automatically stripping the web reel (10), such that the web reel (10) is clamped between the strippers (9), preferably in order to centre it, during stripping.
5. The reel changer according to any one of the preceding three claims, characterised in that the control means (12) controls the drive means (11a-11d) for automatically stripping the web reel (10), such that the first axle journal (8) and the second axle journal (8) are simultaneously moved away from each other by means of the drive means (11a-11d).
6. The reel changer according to any one of the preceding three claims, characterised in that the first stripper (9) can be individually moved relative to the first axle journal (8) by means of the control means (12) and drive means (11a-11d).
7. The reel changer according to any one of the preceding claims, characterised in that the control means (12) controls the drive means (11a-11d) for manually removing the web reel (10), such that the first axle journal (8) is moved axially away from the second axle journal (8) by means of the drive means (11a-11d), while the second axle journal (8) is not moved axially.
8. The reel changer according to any one of the preceding claims, characterised in that the control means (12) has at least two control modes, in order to control the drive means (11a-11d) for manually removing the web reel (10) in accordance with a first control mode and to control the drive means (11a-11d) for fully automatically removing the web reel (10) in a second, different control mode.
9. The reel changer according to any one of the preceding claims, characterised in that the reel changer further comprises:

   a detection means (15, 16, 17; 18) which monitors a secured zone (Z) surrounding the reel arms (4, 5), in order to establish whether there is someone within the secured zone (Z);

   and a security means (14) which is connected to the detection means (15, 16, 17; 18) and which, in a blocking state, prevents the drive means (11a-11d) from moving one of the reel arms (4, 5) parallel to a rotational axis of the web reel (10) and/or pivoting it about the pivot axis (3);

   wherein the security means (14) assumes the blocking state when the detection means (15, 16, 17; 18) detects that there is someone within the secured zone (Z).
10. The reel changer according to the preceding claim, characterised in that the detection means (15, 16, 17) forms a barrier (17), preferably a barrier which operates without contact, for the secured zone (Z).
11. The reel changer according to any one of the preceding two claims, characterised in that the detection means comprises a scanner (18), in order to monitor the secured zone (Z) with overall coverage.
12. The reel changer according to any one of claims 9 to 11, characterised in that the control means (12) comprises an operating means (19) for the reel changer, said operating means (19) being arranged outside the secured zone (Z).
13. The reel changer according to the preceding claim, characterised in that the operating means (19) comprises at least one operating element for activating the drive means (11a-11d) and additionally at least one securing element which, when activated, releases a block on the drive means (11a-11d) generated by means of the security means (14), preferably the blocking state of the security means (14).
14. The reel changer according to any one of claims 9 to 13, characterised in that the blocking state of the security means (14) is only released when the detection means (15, 16, 17; 18) detects that at least one person previously detected by the detection means (15, 16, 17; 18) has left the secured zone (Z) again.
15. The reel changer according to any one of claims 9 to 14, characterised in that no operating elements are arranged in the secured zone (Z) which can be used to manually trigger a movement, generated by means of the drive means (11a-11d), by one of the reel arms (4, 5) parallel to the rotational axis of the web reel (10) and/or a pivoting movement by one of the reel arms (4, 5).
16. The reel changer according to any one of claims 9 to 15, characterised in that control means (12) comprises the security means (14) and fixes the drive means (11a-11d) using an actuating signal (S1, S2, S3, S4) when the detection means (15, 16, 17; 18) detects that there is someone within the secured zone (Z).
17. A method for removing a residual reel from an axle which, in a reel changer of a web-treating or web-processing machine, preferably a roller rotary printing machine, is rotationally mounted on a first and a second axle journal (8) of reel arms (4, 5) of the reel changer, between the reel arms (4, 5);
    characterised in that
    the residual reel (10) is automatically stripped for manually removing from the first axle journal (8) only, while the residual reel (10) remains on the second axle journal (8).
18. The method according to the preceding claim, characterised in that after a reel changer and before stripping, the reel arms (4, 5) are automatically pivoted into a pivoting position which is convenient for stripping and stripped on one side in this pivoting position.

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