FI104367B - Stopper / slider for processing paper rolls - Google Patents

Description

104367

BACKGROUND OF THE INVENTION The present invention relates to a roller actuator and pusher with an electromechanical actuator, particularly for paper rolls, according to the preamble of claim 1.

Paper mills require extensive conveyor systems for transferring rolls, for example, from a winder to a packing line and further into storage. The conveyor system includes, inter alia, lamella conveyors, carriage conveyors, ramps and various devices for transferring rolls from conveyor to conveyor and packaging machines. These transfer devices include various pushers and stops, by means of which the roller is pushed and controlled in a desired position. A pusher is a device for pushing a roll of paper from the conveyor to a rolling plane. A stopper is a device for stopping a roll of paper from rolling from a plane to a conveyor. More generally, a roller stop is used with 20 arms articulated at one end, the movement of which is controlled by a .V of a pneumatic cylinder. Such a stopper operates by rolling the roller into contact with the contact roller at the end of the stopper arm and starting to push the stopper arm in its direction of movement. In turn, the arm moves the pneumatic cylinders • t 25 blades with a throttle valve connected to the direction of discharge. The throttle slows the movement of the piston of the cylinder # · · '·' 'and thus also of the stop rod, thus braking the roll speed to zero. The cylinder is restored to its original position by supplying compressed air to another chamber: ·: · V: 30. This return movement can also be used for roller * SV. pushing again from the wrapping station, for example.

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The conventional roller stopper has almost the same speed throughout the stopping stroke. Today, paper mills have a very large 35 size difference between maximum and minimum roll sizes, typically up to 200 - 8000 2 104367 kg in more modern mills. The stopping device has a constant stopping speed throughout the stopping distance, which causes several disadvantages. The paper roll contact with the stop contact roller is violent at the time of impact, and the surface layers of the roller may become unusable. At the moment of impact, the roll is subjected to a high impact pulse, which causes deformation and possibly breakage of the paper web. In addition, the stop is slow because its speed is the same throughout the stopping distance. The speed of the movable rollers must be kept low 10, for the reasons stated above, the power of the stops must be kept low enough to prevent roller damage. This results in long lead times for the rollers and significantly reduces the speed of the transmission line. Intermediate stops and retarders are much needed to control the roller speeds.

U.S. Patent No. 5,314,295 discloses a pneumatic roller stop in which the stop movement of the stopper is controlled by a pulse-controlled shut-off valve. In this way, the braking force can be more precisely controlled and the response time of the stop speed and braking force adjustment is faster. The solution can also be used to limit compressed air compressed during the stop t · return movement; recoil.

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Conventionally, the movement of the pushing member and the stop member is achieved by • · · '· * * pneumatic or hydraulic cylinders. Some conditions, such as cold and hot pneumatic • ·; * ·· and hydraulically operated roller pushers and • • · 30 which have their own problems. Especially with pneumatic devices • V. you have a problem with the water that accumulates in the working air and in cold • · * ..! equipment in stores and similar facilities "* must use effective water separators to prevent freezing, '5'. The problem with hydraulic equipment is the working fluid *: ·: 35 viscosity variations with temperature. 104367 are relatively short, preventing the medium and equipment temperatures from stabilizing.

The object of the present invention is to replace the pneumatics and hydraulics of the roller pushers and the 5 stops and to provide an electromechanically operated stop / pusher.

The invention is based on the fact that the necessary movements of the stopper and the pusher are performed electromechanically by a gear motor with a brake 10 and a crank mechanism.

More specifically, the stopper / pusher of the invention is characterized by what is stated in the characterizing part of claim 1.

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The invention provides considerable advantages in the handling and loading of paper rolls.

With the device of the present invention, the movement of the stopper and the pusher portion of the roller roller can be uniformly slowed down or accelerated by a gear motor with a disc brake, ···, which substantially reduces roller damage.

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The stop arm can be accurately moved with no load, so its speed is easily set to the speed of the m \ '25 roller at the time of impact. The motion resistance J * ^ • “of the stop can be adjusted to the desired level by adjusting the torque V * of the gear motor disc brake. If the roller collides with the stopper, the stopper gear motor brake slips and · ♦ J the stop force is low enough. The motor is controlled by an »T: 30-wire control unit and the control possibilities are • quite large, as the control unit can be selected to the degree of control required to achieve the desired adjustment. Thus, the movement of the stop can be easily set *! ' high when touched, and deceleration can follow ·: ·: 35 desired response. An advantage over the pneumatic system is that the stopper does not kick back the roll due to compressible working air. In addition, the gear motor stopper and pusher are reliable in both cold and hot conditions. The device is much simpler than pneumatic systems and provides a better control of the stop / move event under all conditions. The system according to the invention can can be easily added to existing pneumatics and hydraulics stops and pushers in connection with retrofits.

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The invention will now be explained in more detail with reference to the accompanying drawings.

Figure 1 shows one side electromechanical pusher pusher according to the invention.

Figure 2 is a side elevational view of an electromechanical floor stopper according to the invention.

Figure 3 shows a side view of one underfloor electromechanical pusher.

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Fig. 4 illustrates one of the subfloors according to the invention; an electromechanical stop on the side.

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* 4 “The following devices function as both stops f» (and pushers without structural modifications. For clarity, the various functions are shown separately and with separate • ·: '·· patterns.

41 »; ϊ: 30 «·· * ·, Figure 1 shows a roller stroke fitted above the factory floor • * \. * t. Such a pusher has a sturdy body ΓΓ whose upper part pivots about the center line of the roller to be stopped. A bearing 8 is secured to the outermost rib of the body 2 by means of which the pusher arm 1 is secured to the body 2. The curved pusher arm 1 extends downwardly from the bearing position and has a contact roller 9 at its end. A crank 5 is attached to the bearing point, to which a crank 5 4 on the shaft of the gear motor 3 is attached at its end. In Fig. 1, the pusher is positioned in connection with the conveyor 11. The outline sizes of the rolls 6 to be processed are shown in dashed lines. The end position 10 of the pusher is likewise indicated by dashed lines. Fig. 1 shows a level boundary 7, which when pressed, roller 6 initiates the pusher return movement back to its initial position.

The course of the push step action of the roll 6 is as follows with 15 such arrangements. The roller 6, the mass of which is known, for example, by the control system of the packaging line, stops by the conveyor 11 at the pusher. The push-in movement starts when the turn of the crank shaft 3 4 rotates, the electric motor, the direction of arrow (clockwise) direction and 20 via the connecting rod 5 the pusher part 5 of the work-V. cushions forward and pushes the roll to 6 levels. The pusher return tab / ··, starts when roller 6 presses the level limit 7 on the plane.

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In the return movement, crank 4 rotates the same lane counterclockwise

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. back or faster movement due to shorter '' I 'f 25 clockwise start position. It is advantageous to control the electric motor by inverter drive, but other control devices such as frequency inverters may be used.

Fig. 2 shows a roller stop arranged above the factory floor surface 30. The device is disposed in connection with the conveyor • 11 and on the opposite side of the conveyor is a plane border 7, upon which the rollers 6 engage the stop j; *; r operation. The course of the stop action is as follows, '1', when such an arrangement is used. The starting position is' ··; 35 according to Figure 2. The connecting rod 5 has a predetermined angle. The roller 6 arriving at the stopper presses the level limit 7 whereby the crank 4 slowly starts to rotate counterclockwise and moves the stop member 1 backwards, whereby the stopper may. roller 6 to conveyor 11. The stopper return flap occurs the same path back as roller 6 starts to advance. The speeds of the rollers 6 arriving at the stop 5 are quite exactly the same, despite the size variations, so that the initial stop retraction speed can be selected for all the rolls. The machine's electric motor is equipped with a disc brake that adjusts to the heaviest roller so that the brake slips-10 if the roller hits the stopper at too high a speed. The adjustable brake can be used to change the slip limit if necessary.

Figure 3 shows a roller stroke fitted below the factory floor surface 15. In such a pusher, the body 2 is located below the floor level 11. A bearing 8 is secured to the upper part of the body by means of which the pusher arm 1 is secured to the body 2. In Fig. 3, the pusher is positioned in connection with the conveyor li. The starting position of the pusher and the roller 6 is represented by a solid line and the end position by a dashed line.

* ...: 25. * The following steps of the roll 6 pushing step are as follows · · using this arrangement. Roller 6, stops with Coulter J * 11 at pusher. The pushing motion starts when the turn of the crank shaft 3 is rotated with an electric • 4 * 30 ·· ester force in the direction of the arrow (clockwise) and, through a connecting rod 5 the pusher part 1 pushes upwards and pushes the roll 6. The pusher retraction begins when the roller 6 presses the level limit 7 in the plane. In the retraction, the crank 4 rotates the same path anticlockwise.

·: · 35 · · · · · · · · · ·: Figure 4 shows a roller stop arranged below the factory floor surface 7 104367. The structure of the device corresponds to the pusher. The operation of the stop operation is as follows when using such an arrangement. The starting position is as shown in Figure 4 (intact stroke). The connecting rod 5 has a predetermined angle. The roller 6 arriving on the conveyor presses the level limit 7, whereby the crank 4 slowly rotates counterclockwise and moves the stop member 1 backwards and the stopper brings the roller 6 onto the conveyor 11. The return movement of the stopper takes place in the same path. The bottom stop is also equipped with a brake whose brake force is set according to the largest roller.

In addition to the above, the present invention has other embodiments. It is essential that the device 15 of the invention is intended to replace electromechanically pneumatics and hydraulics as traditional motors for stop and workpiece movements. In addition to stopping the rollers, this device can be used to slow down the scrolling speed, whereby the stop arm has to bend over the path of the roller 20, for dispensing rolls and other roll handling tasks. The mechanical implementation of the device is most advantageous V. to do with the relatively simple crank, ··· described above. machinery, but other mechanisms may be used, for example, a palm may be provided with an eccentric or toothed, rod and wheel mechanism for transmitting the rotation of the electric motor at a suitable gear ratio to a stop: 9: /. Other brake devices may be used instead of the disc brake.

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Claims (5)

1. Electromechanical roller shifter / stopper for processing paper and paperboard rolls (6), comprising 5 - a support (2), - at least one stop / shift arm (1) arranged by means of a hinge (8) on the frame (2) ), at one end of which is provided a means (9) touching the roller (6) to be stopped, - an actuator for displacing the stop / displacement arm (1) in a desired direction of movement of the roller (6) characterized in that - the actuator for displacing the stop / displacement arm (1) comprises a bar (5) and means (4) connected at one end to the stop / displacement arm for mediating the rotational movement of an electric controlled electric motor (3) by means of the rod (5) of the stop / offset arm (1). 25 II I · ·· 2. A roller shifter / stop as claimed in claim 1, characterized in that the actuator comprises a gear motor (3) and a crank (4) arranged at its output shaft (4) connected to a crank (5), at one end of which stops - / offset arm (1) is connected i · · I «· I · ·. ···. A roller shifter / stopper according to claim 1, characterized in that the bar (5) consists of a toothed blade and the intermediary mechanism of a gear. 35 104367 4. A roller shifter / stopper according to claim 2, characterized in that the gear motor (3) is provided with a brake which can be adjusted to slide at a certain torque. A roller shifter / stopper according to any of the preceding claims, characterized in that the control device for the electric motor of the device consists of an inverter drive. • ·; ·· I f • · • ·· I »· t · i» · • · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·