Patent ES-311577-A1 (ES)
Title: Drive means for planetary napping device
IPC: D06C11/00
Filed: 1965-04-08
Abstract: A raising machine for textile fabric comprises means to compensate for and to measure the forces which tend to prevent raising rollers 10 rotating freely when in contact with the fabric and means including at least one driving element 35 the output side of which is adapted to transmit drive to a gear wheel 14 drivingly engaging the series of card clothing covered rollers 10 of the machine. The arrangement is such that the torque characteristics of the drive may be varied firstly to balance out frictional and other forces resisting movement of the gear 14 and rollers 10 to allow the latter to synchronize with the speed of the fabric passing over the raising machine and thereafter to be varied to cause raising or felting to be achieved, the amount of torque variation being measurable to indicate the amount of raising or felting being applied to the fabric. As shown, a double acting raising machine comprises pile rollers 10 and counterpile rollers 12 mounted to form the periphery of a cylinder in bearings between discs 13. Gear wheels 14, 15 carry spaced apart brackets 16 which overlie the periphery of the disc 13 and which carry belts (not shown) to contact pulleys 11a, 11b on the rollers 10, 12, respectively. The discs 13 are mounted on an axle 17 driven by a motor 18 through a reduction gearing 19. The gears 14, 15 are mounted for independent rotation on the axle 17 and are driven by pinions 20, 21 respectively. The rollers 10, 12 rotate in the same direction which is opposite to that of the discs 13 and tq the direction of movement of the fabric, Fig. 2 (not shown). The pinion 21 is driven through reduction gearing 25 by the output shaft 22 of an eddy current coupling 23 driven from a constant speed A. C. motor 24. The pinion 20 is mounted on a shaft 26 driven from a shaft 30 by a belt 28. One end of the shaft 30 is coupled through a reduction gearing 31 to an eddy current coupling 34 driven from a constant speed A. C. motor 35 and the other end is connected to the rotary member 32 of a dynamic coupling, the other member 33 of which is fixed against rotation. The compensating means includes a variable transformer 48, Fig. 3 (not shown), adapted, when the motor 18 is deenergized to be adjusted until the shaft of the eddy current coupling 34 just starts to rotate to drive the rollers 10 to compensate for the loads associated with friction. A variable transformer 41 is also provided to enable the rollers 12 to be adjusted to rotate below the stationary fabric at a speed similar to the rollers 10. Further variable transformers are provided to enable the machine to be run either to raise or to felt the fabric, after the above conditions have been achieved. The output of the eddy current coupling 34 or of the dynamic coupling 32, 33 may be adjusted in accordance with the conditions required at the points of the wires of the card clothing of the rollers 10. The means to measure the forces acting at the points of the card clothing comprise meters 59, 60, Fig. 3 (not shown), for the rollers 10, 12, respectively, adapted either to indicate the speed of the rollers or the driving energy supplied thereto. A block circuit diagram for the operation of the machine is described, Fig. 3 (not shown).