DE1033424B - Method and device for determining the length of running material webs - Google Patents

Description

Method and device for determining the length of running material webs The invention relates to a method for determining the between generation and dispatch, preferably in paper and film production, I) ifference arising from rejects or the like on surface or

Meter base and a device for performing this procedure.

Length measuring devices are already known in which there are contact rollers or contact plates sensing levers are arranged, which are at the touch of these contact elements are prevented by the moving material web and close a contact and as a result, the downstream counting devices are switched off if there is no material web is located between the contact element and the feeler lever. Rocker arms have also been proposed which are pressed down by the moving material web and open a contact or close if no material web is running. The state of the art also includes a device in which via gear clutches and pull magnet that is operated by a Light barrier is influenced when no material web is running, the length counters turned off. It is also known the length of the endless web of material to be determined automatically with several counters, with some counters showing individual results display and another the grand total value.

All of these known proposals relate primarily to the Textile industry or on strip mills, where measured under completely different conditions will. So, especially in the textile industry, during the measuring process, the in itself not high web speed anyway nor specially regulated so Can be measured stress-free, while the thickness of the Material web and at the same time the length deviating from the prescribed thickness the material web must be measured, with an additional one for control purposes Counter indicates the total measured length.

In paper or film production, the endless material web is used in contrast, as a rule, worked out at high speed and the path at separated at full speed and transferred to a new roll when a winding roll has grown sufficiently large. The operating personnel of the machine will find the heavy stress in this work no time, immediately after severing the Bahn to detach the counter and reset it to zero, so that one is inevitably it usually helps that each winding roll is weighed in an additional work step, or you can determine the length of the material web with the help of cumbersome calculation formulas starting from the diameter of the winding roll.

This applies both to the generation machine as well as for the winding roll coming from the rewinder.

When rewinding the winding roll after intermediate further processing or directly after the production of the paper, etc., the problem is that it is probably possible to determine the length of the material web with conventional meter counters to measure by the counter in an appropriate and customary manner of the same Shaft is driven, which also performs the rotation of the winding roll, but there is no possibility that during the measuring process of the winding roll as Reject removed layers of paper must be taken into account in the measurement result, because the counter cannot be turned back after the broke is removed from the take-up roll has been. In addition, the counting devices also run when the machine is idling, see above that the measurement result is never reliable.

The invention has set itself the task of the existing loopholes close.

The method according to the invention is characterized in that in the generating machine, e.g. B. a paper machine, the length of each winding roll incoming material web at full web speed with intentional inclusion all possible errors etc. contained in the material web are determined for themselves and the final length of the material web after further processing or else immediately after generation in the rewinder or winder under automatic Consideration of the rejects etc. from the winding roll during the rewinding process removed amount of material is measured, so that between production and dispatch The resulting scrap can be determined as a difference without additional work by weighing is and also to the buyer the length or area of the paper delivered to him by simply Reading the counter can be specified exactly. Other advantages of the procedure result from the description.

According to the task, the device disintegrates for exercise the method for determining the length of running material webs in two parts, namely in a device for measuring in the generating machine, e.g. B. a paper machine, and a device for measuring in the rewinding machine.

The apparatus for the generating machine is essentially thereby characterized in that in a manner known per se the incoming into each winding roll Paper is measured, the results of the individual counters also being known in a known manner can be displayed by an additional totalizer, and that according to the invention the disengagement and engagement of the counters from the winding device of the working machine can be done by hand or done fully automatically.

According to the invention, the object set is essentially achieved thereby solved that od by means of a pull lever, rope. Like. From the winding device of the work machine the respective length counter is moved mechanically into working position by hand or electrically by means of a push button and pull magnet.

However, this solution can only be used for machines with a Working speed find use. It therefore becomes a further embodiment proposed whose inventive feature it is that with the help of known, but specially arranged and trained rocker arm or Light barriers are controlled fully automatically.

The measurement result per winding roll can be read off or for reasons of convenience can also be stamped or embossed on a piece of paper. Counting devices are used for this purpose used, which in a known way have number wheels with raised numbers, by means of which with the aid of a specially designed according to the invention and arranged pressure lever, the measurement result is printed or embossed on a piece of paper so that it is possible for anyone to be sent for further processing or shipping to attach a note to the outgoing roll of paper. However, counting devices can also be used use with known types of printing. These are not the subject of the invention.

The counter is driven by one for reasons of convenience Paper roll from or from a roll of the calender or from a drying cylinder.

The device for the rewinding or rolling machine is characterized by that on her in a manner known per se from the support roller shaft by means of belt or other transmission elements driven counting device is attached, the counting process by de-energizing upstream electromagnetic clutches by means of the material web lightly fitting contact elements such as feeler levers, slide springs, chains, etc. or by light barriers, is interrupted when the material web breaks, comes to an end or has larger holes.

The rolling process of the machine can also be interrupted at the same time and also the winding roll are slowed down.

The inventive feature of the device for the rewinding machine consists in the fact that taking advantage of the decreasing diameter, if from the winding roll for any reasons material such. B. paper, removed must be, the counting process is interrupted until the winding roll their returned to its original size.

This is essentially achieved in that on the winding roll or a sensor rests on the pressure roller or on the winding rod, which with growth the winding roll is moved by the same and thereby an electrical contact influences which one on a movable and in every position by itself remains Contact lever or contact head is attached so that the electromagnetic clutch of the Expediently, electricity counters arranged one behind the other on a shaft receives.

If the winding roll now becomes a more or less thick rind torn down, the feeler goes with the winding roll, which has become smaller in diameter back and does not exert any more pressure on the contact lever, the contact is thereby open until the winding roll is back to its original size has reached and closes the contact. Only then do the counters continue to count and show thus the real area or length of the rolled up and dispatched coming material web because for the torn rind it is the replacing one Material is not measured and counted.

The device according to the invention is for the paper machine in Drawing in six Ausfüh approximate examples and for the rolling machine in three embodiments shown. Fig. 1 shows the situation on conventional older paper machines basically. The one passed through the calender 1 or directly from the dryer section incoming paper web 2 is over the guide roller 3 and over or under another Guide roller 4 passed and wound on the upper or lower roll 5 or 5 5a. In of the drawing is wound on the upper roll 5, for example.

The often practiced guidance of the endless paper web2 when on the lower one Roll 5 a is wound, shows the dashed line. It thus forms itself the last guide or coating roller 4 in front of the winder 15 of the angle a, in which the mechanically acting feeler lever according to the invention is preferably a built will. However, the guidance of the endless paper web 2 also often takes place like the dash-dot line shows, so that behind the last roller 4 in front of the winder 15 of the Angle fl results in which, according to the invention, the control elements are also arranged can be, preferably the electric light barriers.

In Fig. 2 and 2a is the simplest form of the device according to the invention shown. Fig. 2 shows the view from above. The guide roller3 has on the driver's side the paper machine an elongated stub shaft 6, which in the drawing, for example a simple friction wheel 7 has. The two counters 8 and 9, in the drawing as simple, conventional meter counters shown are mounted on a slide 10. she each have a friction wheel 11 and 12 on the drive side. The slide is driven through a tension spring 13 is drawn into engagement of the friction wheel 11 with the friction wheel 7. On the on the other side of the carriage a rod or rope 14 is attached, with which the carriage can be pulled to the left by the winder 15 and thereby brings the friction wheel 11 out of engagement with the friction wheel 7, but that Friction wheel 12 comes into engagement.

The handle located on the winder 15 16 is latched into notches. If a pull rod is used instead of the rope 14, so the tension spring 13 can be dispensed with. Instead of the friction wheels are a matter of course other couplings can also be used. They are not the subject of the invention.

The counters are actually moved out and in with the help of the Electromagnetic clutches upstream of the meters. You will be through appropriate contact, For example, sensors of a known type or sensors lying on the material web through light barriers of a known type and arrangement or from in Fig. 5 and 6 shown sensors or light barriers according to the invention, currentless made when the paper web breaks and the guide roller 3 that drives the counters due to its momentum will continue to run for a while. The carriage 10 can, however even without contact sensors and light barriers from the winding device 15 manually The friction wheels 11 and 12 are disengaged by arranging a center grid is, in which the handle 16 of the rope 14 latches.

Fig. 3 shows the same device as shown in Fig. 2 and 2a. Instead of the tension springs 13 and the cable 14, there are only two electromagnets 18 and 19 are arranged on both sides of the carriage 10. These are taken from the take-up device 15 controlled by push buttons and bring the counter into the desired working position.

In both embodiments can of course take place the simple counters 8 and 9 also use counters similar to the autotaxi counters so that counting can be carried out simultaneously over a longer period of time. Such Counters 20 and 21 are shown in FIG. They can be connected by flexible shafts will.

Fig. 4 shows the meter arrangement on a purely automatic principle, so it works completely automatically. On the paper guide roller 3 is a gear 18 ' usual type attached. With it the counters 19 ', 20' and 21 'are driven. They are connected to the transmission by an electromagnetic clutch 22, 23 and 24 each. The transmission always runs when the guide roller 3 or the like rotates. The counters however stand still. They only come into engagement when the electromagnetic clutch22, 23 and 24 receives electricity. According to the invention, this current is supplied by the contactor 25, which is preferably at an angle a in front of the last guide or coating roller in front of the take-up device 15 and shown in Figs. 5, 5b and 5c. It has two feelers 27 and 27a, which are pressed on the paper web 2 towards the middle of the contactor 25 and so give power to one or that electromagnetic clutch of the meter.

The lower sensor acts on the magnetic coupling 22 of the upper one Meter 19 'current, because work is being carried out on the upper roller 5, and the upper sensor 27 on the middle counter 20 '. The counter 21 ', however, always receives power when one of the sensors 27 and 27a is current. So it counts the result of the counter 19 ' and 20 'together.

The contact can be made by levers 27 b and 27 c and by contact plates or springs 28 take place.

Three exemplary embodiments are shown in principle in FIGS. 5, 5b and 5c shown. Fig. 5 a shows the circuit diagram. The isolated on the lower one Contact plate 29 seated on lever arm 27b is spring-loaded so that there is intimate contact with the contacts and vibration of the contact does not occur. aside from that will any overpressure of the sensor arms is absorbed by the paper web. the Sensor arms 27 and 27 a are pressed slightly outwards by a spring 30. In order to the abrasive effect of the running paper web is not disadvantageous expediently, the sensor arms 27 and 27a a seated on the paper web Roll 26 and 26e. To prevent paper dust from getting inside the contactor the opening from which the feeler arms protrude is in a suitable manner sealed.

Leaf springs can also be used instead of the feeler arms.

Instead of the contactor 23 based on a mechanical principle, it goes without saying that contact can also take place on a purely electrical principle, as shown in Fig. 6 is shown with the associated circuit diagram according to FIG. 6a. Before the last roller 4 in front of the winding device 15 is located at the angle a according to the invention Light source 33 and vertically or diagonally above the same a photocell 31 and 32. If the paper web 2 runs over or under the roller 4, there is always a photocell under beam of light.

As can be seen from Fig. 6 a, the energized opens Photocell through the necessary amplifier and relay the circuit to one of the Counter and at the same time to the total result counter, so that this counter stands still and the total result counter does not receive any power from this cell either. The total result counter but receives power from the other photocell as does the third meter from this one Cell receives electricity.

If the paper web breaks completely, both photocells are energized and operate both relays so that none of the three meters receives power.

Of course, the arrangement of the light barrier 33, 31/32 can also take place behind the roller 4 in front of the winder 15 at an angle fl.

The device for printing notes is shown in principle in Fig. 7. According to the invention, there is a by one between the two individual counters 19 'and 20' Pivoting pivot mounted lever 34, which has two embossing pads 35 made of suitable material, e.g. B. rubber possesses. The number wheels are in common Wise raised numbers. A sheet of paper is pressed over it and so is the embossing or stamping - if ink pads are used.

For the rolling machine, the device according to the invention is shown in FIG Drawing shown in three exemplary embodiments. Fig. 8 shows in principle one Rolling machine in side view. The winding roll 36 is driven by the support rollers 37 offset in rotation and loaded with the pressure roller 38 so that the material web winds up without wrinkles. The feeler lever 39 rests on the winding roll 36, which is through suitable means remains self-locking in its position once it has been assumed. In the exemplary embodiment, it has, for example, one at its pivot point end common friction disc clutch 40 and a spring loaded at its other end attached contact lever 41 with roller 42. The growing winding roller 36 presses against the roller 42 of the contact lever 41, so that the contact 43 of the contact lever 41 is closed and at the same time the feeler lever 39 is pushed away from its starting point will. If the winding process is interrupted when the machine is at a standstill If a number of layers are removed from the winding roll 36, the feeler lever remains 39 stand and it opens according to the action of the spring 44 the contact 43 and interrupts the circuit to the electromagnetic clutch 45 of the counting devices 46 and 47. If the machine is running again, the counters do not count for so long until the winding roll has grown back to its original size and the Contact lever 41 the contact 43 and thus the circuit to the magnetic coupling 45 of the Counters 46 and 47 close. Now the feeler lever39 will also move further out of its position postponed. If a new roll is to be wound, simple Cable 48 of the feeler lever 39 is withdrawn and on the very small in diameter new winding roll attached.

As practice teaches, the rollers 36 often do not run completely right away evenly round; They hit.

The sensitive contact lever 41 naturally reacts to these blows and now opens and closes the contact 43 continuously, so that the counters run irregularly is. For this reason, a common delay relay was added to the circuit to the counter 49 interposed so that the counters only come to a standstill when the Contact interruption lasts longer than the selected delay.

With fine, sensitive papers, however, there is a risk of that in the embodiment of the device according to FIG. 8, the roller 42 on the winding roller Leaves 36 marks. This avoids the implementation of the device according to FIG. 9, by the growing roller 36 one on her or on the winding rod 50 or on the pressure roller 38 etc. resting feeler lever 51 lifts and this one through suitable and known measures self-locking made rocker arm 52 moves, whereby a contact is closed. If the winding roll 36 is removed by removing If the material is reduced in size, the feeler lever moves with the winding rod under its own weight 50 back, while the rocker arm 52 due to its self-locking in its once remains in the assumed position and thereby the contact 43, and consequently the circuit to the electromagnetic clutch 45 of the counters 46 and 47 is interrupted until the feeler lever 51 touches the rocker arm again and the contact 43 closes.

Similarly, the same effect can be achieved by a bearing sliding in the frame of the machine, for example that of the winding rod, an additional and self-locking contact head arranged above or next to the bearing shifts, whereby the circuit to the electromagnetic clutch of the counter is closed will.

In order to avoid that the operating personnel of the machine or applying the feeler lever 52 delayed or completely forgets, the move the contact elements in the work start position also automatically and automatically take place.

As is known, the winding rod 50 of the winding roll rises by this only half as high as the pressure roller resting on the winding roller 36 38, because the winding rod 50 is only supported by the lower paper layers which are in contact with the support rollers 37 the winding roll is lifted while the pressure roller 38 of the lower and of the upper layers experience a shift upwards. If you put a rocker arm 52 shifting feeler lever 51 on the winding rod 50 and assigns, for example a lever 53 on the bearing of the pressure roller, which presses on the rocker arm 52, when the pressure roller 38 is placed on the newly wound sleeve 54, so There is already a gap between the rocker arms when the first layers are wound up 52 and pressure lever 53 of the Pressure roller 38, which becomes larger, the more the winding roll grows.

The pressure roller 38 can therefore be used as desired during the winding process be raised and lowered without the risk that the pressure lever 53 the rocker arm 52 touched and unintentionally moved.

But if a new winding roll is started and the pressure roller 38 is necessary placed on the winding tube 54, the pressure lever 53 presses the pressure roller 38 the rocker arm 52 from its position reached in the previous winding down onto the winding bar 50, that is to say in the starting position.

It goes without saying that this arrangement can also be used for additional purposes a sensing lever 51 resting on the winding rod is dispensed with and that in the Framing of the machine sliding bearings of the winding rod 50 (not in the drawing shown) is used to move a contact head 55 made self-locking will. The sensitivity of the contact can expediently be achieved by means of transmission levers, for example, angle lever 56, take place, which is pressed by a spring abt from the contact when the winding rod bearing is no longer on the lower leg of the angle lever 56 works.

FIG. 9 again shows the situation in the rolling machine in principle from seen from the side when the winding roll is very small and the pressure roller 38 is flat has been put on. The winding bar 50 with the winding tube 54 attached rests on the support rollers 37. The pressure roller 38 is on the winding tube 54 lowered. The feeler lever 51 with the roller 42 has its own Weight is placed on the end of the winding rod 50 protruding from the winding tube 54. The rocker arm 52 is from the pressure lever attached to the bearing of the pressure roller 38 53 has been pressed down, so that the contact 43 and thus the circuit to the electromagnetic clutch 45 the counters 46 and 47 is closed.

Fig. 10 shows the third embodiment of the device for the rolling machine also seen in principle from the side when the winding roll 36 has grown. The one on the winding bar 50, but better on the one in the drawing Feeler lever 51 resting on the winding rod bearing (not shown) has risen and presses on the angle lever 56 of the contact head 55, whereby the contact and thus the circuit to the electromagnetic clutch 45 of the counters 46 and 47 is closed is and consequently the counters are working. The pressure roller 38 with the pressure lever 53 but has doubled than the winding rod 50 from its initial working position removed. The pressure lever 52 thus no longer touches the contact head 55, so that the The pressure roller 38 is therefore raised as desired and placed back onto the winding roller 36 can be, without the risk of the contact head 55 from its once occupied Unintentional move position.

Claims (12)

PATENT CLAIMS: 1. Procedure for determining the length of ongoing Material webs, preferably in paper or film production, with the help of several Counting devices, characterized in that in the generating machine, for. B. a paper machine, the length of the material web entering each winding roll at full web speed under Inclusion of all possible errors etc. contained in the material web are determined for themselves and the final length of the material web after further processing or immediately after generation in the rewinding machine with automatic consideration of the or the like. Removed from the winding roll during the rewinding process Amount of material by interrupting the measuring process until the winding roll again has reached its previous size. 2. Device for carrying out the procedure for determining the length running material webs according to claim 1 for the generating machine, z. Legs Paper machine, with the help of contact elements lying on the material web, which influence counting devices via upstream magnetic couplings, characterized by that the control of the individual counters by a push rod, a rope (14) od. Like. Or by means of a push button and electromagnet (18, 19) from the winder from manually or via in front of or behind the last roller (4) in front of the take-up device arranged mechanical or electrical control elements, for example light barriers known design, takes place fully automatically. 3. Apparatus according to claim 2, characterized in that the mechanical Contactor (25) has two sensor arms (27.27 «). which alternate with the current one Material web (2) are pressed down and upstream via contacts and the counting devices Electromagnets bring the individual counting devices into working position. 4. Apparatus according to claim 2 and 3, characterized in that the sensor arms (27,27a) via articulated levers (27b, 27c) are resilient and adjustable Press the contact plate (29) down onto the control contacts. 5. Apparatus according to claim 2 to 4 using commercially available Counting devices. characterized in that between the counters (19 'and 20') a with Ink pad or embossing plate (35) equipped and articulated in a pivot point Pressure lever (34) is arranged. 6. Device for carrying out the procedure for determining the length running material webs according to claim t for the rewinding machine, characterized in that that on the winding roller (36) or on the pressure roller (38) in a pivot point bearing sensor arm (39), which by the growth of the winding roll (36) is shifted from its original position and by the resulting pressure about con- clocks (43) the circuit to the electromagnetic clutch (45) of the counters (46, 47) influenced. 7. Apparatus according to claim 6, characterized in that the on the winding roller (36) or the feeler arm (39) resting against the pressure roller (38) a braking or holding device (40) is equipped, which the feeler arm (39) holds on to the position it has once assumed. 8. Apparatus according to claim 6 and 7, characterized in that the feeler arm (39) has a contact lever which is articulated and under the action of a spring (44) (41), which under the pressure of the growing winding roll (36) on contacts (43) works. 9. Apparatus according to claim 6 for the rewinding machine, characterized in that that on the winding roller (36) or on the pressure roller (38) or on the winding rod (50) or the like. A feeler lever (51) sliding on a rod rests on the one in the usual way made self-locking rocker arm (52) moves and thereby the electrical contact (43) to the counters (46, 47) upstream magnetic coupling (45) influenced. 10. Apparatus according to claim 9, characterized in that by the lifting of the winding rod (50) with winding sleeve (54) and in the frame of the rewinder sliding bearing when the winding roll (363 over a Feeler lever (51) made self-locking with conventional means and on one Rod sliding contact head (55) is moved, which has an angle lever (56), which opens and closes the electrical contact (43). 11.Vorrichtung according to claim 9 and 10, characterized in that a pressure lever (53) arranged for example on the bearing of the pressure roller (38) contact-making elements, for example the rocker arm (52) or the contact head (55) automatically and automatically enters the starting position. if the The pressure roller is lowered onto the winding core (54) to be rewound. 12. Apparatus according to claim 6 to 10, characterized in that in the circuit to the counters (46 and 47) upstream electromagnetic clutch (45) a delay relay is interposed. Documents considered: German Patent No. 665 473; German patent application V 6240 IN / 42h (published on March 10, 1955); U.S. Patent No. 2,315,747.