Drives pertaining to a reel changer

Abstract

A drive for a reel changer includes at least one electric motor. This drive is used to rotatably drive a web supply roll that is held in the reel changer. A web of material is wound on the supply roll. The electric motor is embodied as a synchronous motor.

1 - 64 . (canceled)  
     
     
         65 . A drive for a reel changer comprising: 
 at least one receiving unit in said reel changer and adapted to support a material reel on which a web of material is wound;    an electric motor usable to drive said at least one receiving unit about an axis of rotation, said electric motor being a synchronous motor; and    an armature in said synchronous motor, said armature having permanent magnet poles.    
     
     
         66 . The drive of  claim 65  wherein said synchronous motor includes a drive shaft, said drive shaft being adapted to directly engage said material reel.  
     
     
         67 . The drive of  claim 66  further including radially protruding carrier elements on said drive shaft and adapted to engage said material reel.  
     
     
         68 . The drive of  claim 67  wherein said carrier elements are rigidly connected to said drive shaft.  
     
     
         69 . The drive of  claim 65  wherein said synchronous motor includes a drive shaft, said drive shaft being a hollow shaft.  
     
     
         70 . A drive for a reel changer comprising: 
 at least one receiving unit in said reel changer and adapted to support a material reel on which a web of material is wound;    an electric motor usable to drive said at least one receiving unit for rotation about an axis of rotation; and    a hollow drive shaft in said electric motor, said hollow drive shaft being coaxial with said receiving unit and usable to drive said receiving unit.    
     
     
         71 . The drive of  claim 70  further including a movable adjustment element in said hollow drive shaft.  
     
     
         72 . The drive of  claim 71  wherein said movable adjustment element is an actuating shaft.  
     
     
         73 . The drive of  claim 71  further including recesses in said hollow drive shaft, and spring means in said recesses, said spring means being usable to shift each adjustment element in said hollow drive shaft into a reel engaging position.  
     
     
         74 . The drive of  claim 73  wherein said spring means includes disc springs.  
     
     
         75 . The drive of  claim 73  further including an activation device usable to shift said adjustment element into a reel release position, said receiving unit being located on a first side of said electric motor, said activation device being located on a second, opposite side of said electric motor.  
     
     
         76 . The drive of  claim 75  wherein said activation device includes a diaphragm cylinder.  
     
     
         77 . The drive of  claim 75  wherein said activation device includes a lever mechanism.  
     
     
         78 . The drive of  claim 77  further including a diaphragm cylinder adapted to move said lever mechanism in a direction parallel to said axis of rotation.  
     
     
         79 . The drive of  claim 71  further including a fixing device engageable with said material reel in response to movement of said adjustment element.  
     
     
         80 . The drive of  claim 65  further including an ejector unit concentric with said at least one receiving unit and usable to remove said material reel from said receiving unit.  
     
     
         81 . The drive of  claim 80  further including an actuating element usable to activate said ejector unit.  
     
     
         82 . The drive of  claim 81  wherein said actuating element includes pneumatic cylinders disposed axially with respect to said at least one receiving unit.  
     
     
         83 . The drive of  claim 70  wherein said hollow shaft is part of said receiving unit.  
     
     
         84 . The drive of  claim 70  wherein said electric motor is a synchronous motor.  
     
     
         85 . The drive of  claim 84  wherein said synchronous motor is a field-suppressible synchronous motor.  
     
     
         86 . The drive of  claim 85  wherein a field-suppression of said synchronous motor has a ratio of up to 1 to 10.  
     
     
         87 . The drive of  claim 65  wherein said synchronous motor has six poles.  
     
     
         88 . The drive of  claim 65  wherein said synchronous motor has an electrical exciter.  
     
     
         89 . The drive of  claim 65  wherein said synchronous motor has a permanent exciter.  
     
     
         90 . The drive of  claim 84  further including an armature of said synchronous motor having permanent magnet poles.  
     
     
         91 . The drive of  claim 65  wherein said synchronous motor has a constant idle momentum in the range of 100 Nm to 100 Nm.  
     
     
         92 . The drive of  claim 65  wherein said synchronous motor has a maximum rotational momentum in the range of 600 Nm to 800 Nm.  
     
     
         93 . The drive of  claim 65  wherein said synchronous motor has a theoretical no-load rotational speed in the range of 500 rpm to 600 rpm.  
     
     
         94 . The drive of  claim 65  further including frequency control means usable to regulate a rotational speed of said synchronous motor.  
     
     
         95 . The drive of  claim 65  further including a rotational angle sensor on said synchronous motor.  
     
     
         96 . The drive of  claim 65  further including a cooling fan on said synchronous motor.  
     
     
         97 . The drive of  claim 70  further including a braking device on said electric motor.  
     
     
         98 . The drive of  claim 70  wherein said electric motor is usable as a brake during generator operation.  
     
     
         99 . The drive of  claim 65  further including a rotational angle sensor having a rotational axis which is coaxial to a rotational axis of said armature.  
     
     
         100 . The drive of  claim 65  wherein a rotational axis of said material reel and a rotational axis of said armature are coaxial.  
     
     
         101 . The drive of  claim 65  wherein a rotational axis of said material reel and a rotational axis of said armature have the same rotational momentum.  
     
     
         102 . The drive of  claim 65  further including a core of said material reel.  
     
     
         103 . The drive of  claim 65  further including a second receiving unit, said first and said second receiving units engaging first and second ends of said material reel.  
     
     
         104 . The drive of  claim 103  wherein both of said first and second receiving units are supported for rotation and further wherein said electric motor drives only one of said first and second receiving units.  
     
     
         105 . The drive of  claim 103  wherein each of said first and second receiving units include radially immovable carrier elements adapted to be press-fit into a core of said material reel.  
     
     
         106 . The drive of  claim 104  wherein axial forces are absorbable by said receiving unit and driven by said electric motor.  
     
     
         107 . The drive of  claim 104  wherein said first and second receiving units are structurally the same and each is a cone.  
     
     
         108 . The drive of  claim 106  wherein each said receiving unit is movable axially with respect to said reel changer along a central axis of said material reel.  
     
     
         109 . The drive of  claim 108  wherein each said receiving unit is movable axially by a scissor lever mechanism.  
     
     
         110 . The drive of  claim 103  wherein each of said first and second receiving units are supported by supports, distances each said support to each said receiving unit being equal for said first and second receiving units.  
     
     
         111 . The drive of  claim 110  wherein each of said supports includes a bracket having first and second sides, each said support including first and second support points on said first and second sides of said bracket.  
     
     
         112 . The drive of  claim 111  wherein a distance between said first and second support points for each of said supports corresponds to a width of said brackets.  
     
     
         113 . The drive of  claim 110  wherein said first and second supports are structurally identical.  
     
     
         114 . The drive of  claim 103  wherein said first and second receiving units form a first pair of receiving units and further including a second pair of receiving units.  
     
     
         115 . The drive of  claim 114  wherein said first and second pairs of receiving units are supported for pivotal movement about a common pivot axis.  
     
     
         116 . The drive of  claim 115  further including a pivot actuator usable to accomplish said pivotal movement of said first and second pairs of receiving units.  
     
     
         117 . The drive of  claim 115  wherein each of said first and second pairs of receiving units has one said electric motor adapted to drive a first of said receiving units.  
     
     
         118 . The drive of  claim 117  wherein said electric motors for each said first receiving unit are located on the same side of the reel changer.  
     
     
         119 . The drive of  claim 114  wherein each said receiving unit has an electric motor.  
     
     
         120 . The drive of  claim 114  wherein each said receiving unit includes an actuator usable to displace said receiving unit in an axial direction of said material reel.  
     
     
         121 . The drive of  claim 120  wherein each said actuator is movable with its one of said receiving units.  
     
     
         122 . The drive of  claim 121  further including a control element for each said actuator and movable with each said actuator.  
     
     
         123 . The drive of  claim 65  wherein said electric motor is usable to wind a material onto said material reel.  
     
     
         124 . The drive of  claim 65  wherein said reel changer is disposed on a web-fed rotary printing press.  
     
     
         125 . The drive of  claim 69  wherein said drive shaft is the rotor of said synchronous motor.  
     
     
         126 . A drive for a reel changer comprising: 
 at least one receiving unit in said reel changer and adapted to support a material reel on which a web of material is wound;    an electric motor usable to drive said at least one receiving unit about an axis of rotation;    a plurality of material reel engageable clamping jaws in said at least one receiving unit; and    a diaphragm cylinder usable to move said clamping jaws radially with respect to said material reel.    
     
     
         127 . The drive of  claim 126  further including a lever arm having a first end in engagement with said diaphragm cylinder and a second end secured to a pivot.  
     
     
         128 . The drive of  claim 127  further including a clamping jaw actuating element engageable with said lever arm intermediate said first and second ends.