DE102004021627B3 - Roller support for supporting supply roller with axle for rotation printing machine has regulator that regulates imbalance force to desired value by driving final control element(s) to vary roller revolution rate - Google Patents

Abstract

The device (01) has at least two supporting arms, with holding elements (03,04), especially clamping mandrels, and at least one measurement sensor (07,08) with which the force resulting from the roller's imbalance is measured. The force is regulated to a desired value by driving at least one final control element (11,12) with which the revolution rate of the roller can be varied. A maximum imbalance value is stored in a regulator (09) as a desired value.

Description

The The invention relates to a roller carrier for supporting a aufgeachsten Supply roll according to the preamble of claim 1.

Such roller carrier For example, as a roll changer on web-fed rotary printing presses used to perform an uninterrupted role change to can.

Such a roller carrier with transducers for measuring the imbalance on the supply roll is for example off EP 06 57 725 B1 known. In the case of the reel changer described there, the measured value of the unbalance is transmitted to a control computer, wherein when an unbalance limit value is exceeded, the control computer emits a signal which reduces the rotational speed or shuts off the drive motors.

Of the Invention is based on the object, a roller carrier for Storage of a aufgeachsten supply roll to create, in the damage by unbalanced rollers are avoided.

The The object is achieved by the Characteristics of claim 1 solved.

The Invention is based on the idea of a roller carrier Set up control circuit, with which the imbalance to a predetermined setpoint can be regulated. For this purpose, a control device is provided on the roller carrier. The control device is the input of the measured imbalance of the Fed supply roll, wherein in the control device, the difference between the setpoint and the actual value the imbalance is calculated. As soon as a control difference occurs, the control device acts on an actuator, for example the drive motors for driving the supply roll or on in the drive train provided braking devices to in this way the rotational speed according to the given controller characteristic to change until, the imbalance setpoint is reached again.

Preferably The regulation of unbalance should be continuous during the startup of a new one Supply roll are made. It is therefore particularly advantageous if the sensor is suitable for continuous measurement of imbalance is.

To a preferred embodiment as unbalance setpoint a maximum limit in the control device saved. This maximum limit will be so. chosen that damage are reliably excluded on the functional elements of the roller carrier.

Especially the maximum limit can be chosen such that a bond the material web beginning of the supply roll to the running material web just guaranteed during the continuous roll change is. As a result, it is achieved that when reel change just the maximum rotational speed is maintained at the bonding of the two webs is still possible with each other. This way is a reliable one Operation guaranteed at maximum processing speed.

The Drive speed of the supply roll is also still by others Factors, such as the maximum web speed limited. is this maximum web speed has already been achieved and will at the same time the unbalance limit has not yet been exceeded, it is advantageous when the controller is turned off in this case, since Control interventions from there on are no longer necessary.

The Imbalance measurement of a supply roll can also be independent of Production process, z. B. before the roll change to the roll quality to consider and to sort out bad roles in advance.

At the Increase Machine speed, the imbalance measurement is automatic switched on and evaluated according to the invention and taken into account. A message appears on a control desk.

The Measured imbalance can be logged and thus provides the possibility an objective quality control the supplied supply rolls.

One embodiment The invention is illustrated in the drawing and will be described below described in more detail.

The single drawing shows a schematically illustrated roller carrier in view from the front.

In the drawing, designed as a reel changer roller carrier 01 for storing an aufgeachsten supply roll 02 shown schematically. To the support arms of the roller carrier, not shown in the drawing 01 are holding elements 03 ; 04 , For example, mandrels, provided in a sleeve 06 the supply roll 02 fixing to the on able to be brought.

On the holding elements 03 ; 04 each are transducers 07 ; 08 provided with which the imbalance of the supply roll 02 can be measured. These measured values of the transducers 07 ; 08 be via lines to a control device 09 where it is calculated by comparison with a predetermined imbalance setpoint, a control difference. As soon as a control difference occurs the controller calculates 09 according to the predetermined controller characteristic a required control intervention, via lines to the dedicated actuators 11 ; 12 , which may be formed, for example, in the form of drive motors or braking devices on. The rotational speed of the supply roll then becomes corresponding to the predefined setting intervention 02 modified until the unbalance actual value corresponds to the specified imbalance setpoint.

Advantageous drives at least one z. B. angular position-controlled drive motor, at least one mandrel. Preferably, the drive motor is coaxial to the sleeve arranged.

01

roller carrier

02

supply roll

03

retaining element

04

retaining element

05

06

shell

07

transducer

08

transducer

09

control device

10

11

actuator

12

actuator

Claims (6)

Roller carrier ( 01 ) for storing an upright supply roll ( 02 ) on a rotary printing press, with at least two support arms, at their free ends in each case a holding element ( 03 ; 04 ), in particular a mandrel, is provided; that on a sleeve ( 06 ) of the supply roll ( 02 ) can be brought into contact with the fixing, wherein 01 ) at least one transducer ( 07 ; 08 ) is provided, with which the force generated by an imbalance of the supply roll ( 02 ), characterized in that a control device ( 09 ) is provided, with which the force generated by the imbalance by controlling at least one actuator ( 11 . 12 ), with which the rotational speed of the supply roll ( 02 ) is variable, is regulated to a desired value that in the control device ( 09 ) a maximum limit value for the imbalance is stored as a setpoint value and that the maximum limit value corresponds to the value of the imbalance at which an adhesion of the web start of the supply roll ( 02 ) is just still guaranteed at a running material web during the continuous roll change. Roller carrier according to claim 1, characterized in that as an actuator ( 11 ; 12 ) a drive motor is provided, with which the supply roll ( 02 ) can be accelerated rotationally. Roller carrier according to claim 1 or 2, characterized in that as an actuator ( 11 ; 12 ) a braking device is provided, with which the supply roll ( 02 ) can be braked rotatory. Roller carrier according to one of claims 1 to 3, characterized in that the transducer ( 07 . 08 ) continuously absorbs the force generated by the imbalance. Roller carrier according to one of claims 1 to 4, characterized in that the roller carrier ( 01 ) as a roll changer ( 01 ) is trained. Roller carrier according to one of claims 1 to 5, characterized in that the control device ( 09 ) upon reaching a predetermined limit speed of the supply roll ( 02 ) can be switched off.