DE1951820C - Device for feeding and winding a web-shaped material - Google Patents

Description

ι,

The invention relates to a device for feeding a paper web to a machine for producing

leading and winding a web-like material or processing of business frontnickers

with a supply roll, one of which is fed from the web tension. In these cases a constant

adjustable tension pulley and one of the adjustment of the web tension of special concern

movement of the tensioning pulley controlled at the forward 5.

Advisory role attacking braking device. An expedient embodiment of the inventor

Such a device, with which a turning bar is provided in the dung, by means of dtieir di (

substantially constant web tension can be achieved, web moving in a vertical plane se

is from the German patent specification 1 272 073 is rotated that the web is beyond the turn

already known. The braking device comprises ίο rods moved in a horizontal plane, Au

a brake band that covers part of the supply- this way can be arranged vertically before

rollenuir.fang rests against the supply roll and even advises roll over the web in a horizontal extension

depending on which is fixed by means of the tensioning pulley, in order then in the required V / eise

provided web tension is tensioned in order to be processed or processed at,

decreasing web tension a greater and at 15 a particularly simple and trouble-free ar

with increasing web tension, a lower braking force arises when di

exercise on the supply roll. To tension the tension pulley mechanically with the lever

The brake band is a special air-operated compressed air supply valve that is coupled.

Clamping device is required, and thereby the case is contained in an advantageous embodiment

The device is complicated and, accordingly, the table has a compressed air duct that is on the upper

subsceptible. In addition, the brake band is attached to the table below the supply roll

Significant wear as a result of the friction leads to the orderly nozzles. The arrangement severali

The supply roll and the applied brake band nozzles enable precise regulation of the effect

subject to tension. sameness of the Druckkiftkissens, whereby in particular

The object of the invention is accordingly also through the arrangement of the nozzles with a difference

based on a device with the aforementioned Hchem radial distance to the axis of the supply

Art to be designed in such a way that a constant web roll can be achieved that with decreasing

tension with inserting means in reliable and diameter of the supply roll the number of effective

failure-prone manner is achieved. seed nozzles and thereby the braking force

To solve this problem, the invention is 3 ° automatically depending on the diameter or weight

from the above-mentioned Vorriitung and the supply roll ai is fitted,

is characterized by a table on which there is an expedient further development of this Aus

Cine existing from the sheet material guide provides that each nozzle through

Support roll with an end face can include a spring-biased valve member)., There

and the one device for centering the front 35 normally rests against its seat and closes it

Council roll has a device for generating it, however, opened wildly when skh the Vorralsroll

a compressed air cushion between the ob -sehe moved over the valve organs. It will

Table and the lower end face of the supply roll preferred a training in which by springs

as well as a compressed air supply valve, which are valve balls in pre-stressed valve organs,

depending on the position of the tensioning roller adjusted 40 According to another embodiment, de

an annular groove is used to supply compressed air from a pressure table, to which compressed air is supplied

air source from to the device for generating can be. Using a Ringnvt too

a compressed air cushion between the table and the generation of the air cushion secures on easy!

To regulate supply roll. Way an even air cushion support de

In this embodiment, the braking device 45 is a supply roll around its axis,

formed by the table, the front face of the front. Furthermore, a training has proven to be useful

Council role attacks. The compressed air cushion proves that the centering device is used

the supply roll a locker rotatably mounted in bearings depending on the position of the pre-rais roll

the tensioning pulley more or less from the table.

lifted, whereby the applied from the table 50 The invention is shown below with reference to the scheme

Braking effect in the required way regulated lischer drawings close to exemplary embodiments:

will. Even if several nozzles for generating the explained.

Compressed air cushion are provided, is a single F i g. ! shows schematically in a side view

Compressed air supply valve for regulating the pressure; a table for supporting a supply roll;

Air supply to all nozzles is sufficient so that 55 F i g. 2 is an enlarged partial section through di

in this case a simple and reliable arrangement according to FIG. 1;

trouble-free device is obtained. F i g. 3 is a fig. 2 corresponding floor plan;

It must be taken into account that the table does not have a F i g. 4 and 5 show details in partial sections

is exposed to substantial wear and that the valve devices of the table;

the end face of the supply roll resting against the table in FIG. 6 is a schematic side view de

advantageously forms a friction surface, the device for regulating the web tension;

automatically replaced with each new supply roll F i g. 7 and 8 schematically show an arrangement

so that no disruptive degradation for use in connection with a pressure

usage occurs. Therefore, the invention press;

according to the device largely maintenance-free- «3 Figs. 9 to 15 show further modified designs

be driven. embodiments of the invention.

In particular, the device can then be described with FIG. 1 to 6 can be seen in the schematic Apply advantage if the strip-shaped material representation a device for processing

3 4

Forms for business purposes with printing paper web, and the change of position

rollers, which have a cohesive piece of paper on the tensioning roller, are used to

bahn2 is fed from a supply roll 3, drove compressed air to the nozzles 6 and damii as well

which, with one end face on a table 4, increases the amount of compressed air escaping from the nozzles

supports. 5 rules.

After being pulled from the supply roll 3, the paper web is fed to the processing device

device 1 supplied to an endless form- the paper web 2 via adjustable, by means of compressed air

train to be processed. The supply roll 3 rests prestressed turning bars 14, by means of which the

on an end face, d. i.e., it is based on a plane of the web is rotated by 90 °,

their flat circular ends on the table so - ° If there is no roll on the table,

from that its axis is perpendicular. At rest, the valve balls 7 of the nozzles 6 are through the

position of the device, the supply roll 3 is pressed on associated springs 8 upwards to the

the top of the table 4 ate. Furthermore, a single nozzle must be closed. When the processing equipment

direction for centering the supply roll available. ment is to be put into operation, the

The supply roll can supply compressed air between two lowering nozzles via the throttle valve 12

quite movable Zenirierdornen 5 be arranged. closed, but since the nozzles are closed, it can go out

According to FIG. 2, no air can escape them from the lower centering pin Sa. On the other hand, it becomes a

by a compressed air cylinder S c moved up the supply roll 3 on the table 4 is caused

and in contact "lit the lower end of a tube- the weight of the supply roll where it has a nozzle

shaped core of the supply roll are brought, -o covers that the valve ball in question 7 after

and according to FIG. 2 is a second, upper centering button that is pressed down to open the nozzle 6, so

mandrel Sb is provided, which by means of a further that compressed air is released from the relevant nozzles.

Compressed air cylinder S d is moved downwards and can be soft to move between the nozzles and the

rührur.g a compressed air cushion to the upper end of the tubular underside of the supply roll

Core of the supply roll 3 can be brought. The as generate.

Dnickiuftzylinder 5c and Sd may be sequentially moved comparable to be-Steuerventii 19 with a compressed air source 18 by the centering pins 5, to bring the roller into the right position to be prevented. When the device is in operation, the paper web is then passed under the tensioning roller 13 and the supply roll 3 above the table 4 through to the processing device 1. Compressed air cushion is supported by which the roller in 30 When the processing machine is started a small distance from the top of the table, the nozzle 6 is held via the throttle valve 12. The device for generating and the compressed air channels 10 are supplied with compressed air, the compressed air cushion can escape from several small nozzles 6 on the upper side of the table opening under the supply roll 3, around a compressed air cushion, through which the compressed air can stand between is directed. Each of the 35 on the top of the table 4 and the bottom of the nozzles 6 ui. Holds a valve ball 7 to produce the normal supply roll. This Druckiuftkissen proved by a spring 8 so biased upwardly possible to overcome the paper web that it rests against a seat 9 and pull its upper part of a minimal frictional resistance from the roller part according to FIG. 4 upwards over the top. When the tension of the paper web protrudes to the table 4. "When a supply roll 3 40 gets low, the tension roll 13 moves up above one of these nozzles on the table, and this arranges the throttle valve, it comes into contact with the valve 12 actuated to supply compressed air to the balls 7, so that the valve balls decrease against the nozzles 6, so that the height of the compressed air cushion, which carries the pretensioning force of the associated springs 8 downwards, is reduced, until its upper parts are pressed against the upper part Supply roll strives to curse on the table side of the table 4 and the valve balls fall down, so that the friction between are lifted down from their seats 9, the supply roll and the table increased and so that the compressed air between the seats 9 and the speed valve balls 7 escape from the nozzles 6 during the unwinding of the paper web like to

Below each nozzle are one or more high, the tension roller 13 moves upwards, and Dtuckluftkanäle 10 arranged, which with a pressure also this movement is connected to the throttle valve air source il for feeding the nozzles, valve Ϊ2 transmitted to open it further and

The nozzles 6 are shown in FIG. 3 on the table 4 so the supply of compressed air to the nozzles 6 to increase according to a symmetrical pattern on straight SS, so that the pressure is distributed in the compressed air lines that increase from the center of the table and pillow. As a result, the friction between the axis of the vertically movable view of the supply roll and the table is reduced, and centering pins 5 extend radially outward. The and the supply roll can be rotated more easily, so compressed air channels 10 are with the compressed air source U that the tension of the paper web is reduced, z. B. a centrifugal pump, according to F i g. 1 by a 60 During the unwinding of the paper web from the pressure air supply valve used for regulation, supply roll 3, both the weight z. B. Drosselklappenvervtil 12 connected, its · as well as the diameter of the supply roll. As a result of z. B. is mechanically coupled by a lever 12 α with this reduction of the supply roll diameter of a tensioning roller 13, via which the supply roll covers the further outwardly attached paper path from the supply roll 3 to the Ver * «5 no longer arranged nozzles, so that dir to * bedding device 1 is running. The tensioning roller resembles associated valve balls 7 to move upwards. Changes in the tension of the roller 3 in order to close these nozzles and the ent · to the processing device 1, e.g. Bi. Printing press to prevent giving way to compressed air. To this

In a manner that is applied to the roll, a bearing 21 arranged coaxially therewith is held decelerated as the storage roll diameter decreases and it can be seen that this lower end section 23 is of smaller diameter Order carries a simple and functional device, which is conical-shaped at its lower end / to balance the friction forms. s is trained. When a supply roll in the oe-

Vorrichiungert of the type described above is to be brought to the need, one assigns for unwinding paper webs from supply roll «it is coaxial with the device and leads can be assigned to a processing device, the spindle 22, whose thinner end section according to that processed multiple paper webs, facing down, from top to bottom in the warehouse Soak from several supply rolls at the same time, deviating from 21.

be wrapped. In such a case, each pre-Fig. 12 shows a further embodiment, the

ralsrollc are carried by a separate table proves to be particularly useful when the. wherein the supply rolls according to Fig. 9 or 10 several support tables4 are arranged one above the other, side by side or according to FIG. 7 on top of each other- In this case, each support table has a central one lying tables 4 are arranged. In each recess, in which an ejector piston 24 at-FnII, is the supply roll from which the paper is arranged, with two channels in the recess web is to be unwound, during the confluence, so that one of the recess over a Send compressed air to the device with the help of a conveying channel or the air out of the device with several to be fed with compressed air - recess can be suctioned through the other channel, brought the nozzles 6 to the table 4 in question. An axle carrying bearings is also provided. These nozzles 6 generate a compressed air cushion on and which fits into the central opening of the paper roll which the rolls can easily be moved axially from a loading position and in the supply roll and can also be transferred to the table on which it can be rotated. When a supply roll is on the the paper web is to be arranged from the supply roll unwound from table 4, the axis is in shall be. 45 introduced the opening of the roller, whereupon the

According to FIG. 7 and 8, the supply roll supply roll is moved on the table 4 until the axis each arranged on an associated table 4, slide into the recess of the table »; here is to be unwound, and the tables 4 are previously the ejector piston 24 by suction of arranged one above the other. Furthermore, each of the air from the space under the piston is via one Tables 4 a support and transport surface 15 to- 30 of the channels 25 have been moved downwards. Now ordered, with multiple nozzles, similar to the supply roll is in the correct position, Nozzles according to FIG. 4 and 5. are provided, so that the paper web is unwound and processed cbcnfatls compressed air can be supplied. Can continue. As soon as the paper web is used up, A vertically movable platform 16 is presented to the space under the ejector piston seen the z. B. in connection with the lifting 35 24 compressed air to the ejector piston together device of a forklift can be used with the axis to move upwards. Then will can, in order to move a supply roll on one of the roll cores from the table 4, To store transport surfaces 15. with a stop, not shown, the upward

The platform 16 can be limited in FIG. 8 with full movement of the ejector piston 24 so that As shown in the lines, on one side of the 40 it does not protrude over the top of the table 4. Support table4 or in the broken line Fig. 13 shows a device similar to that

indicated manner in alignment with the table 4 according to F i g. 11. In which, however, the recess 20 of be arranged. an annular groove 26 is surrounded. which has a print

According to FIG. 9, it is possible to have several air ducts connected to the compressed air source Tables 4 next to each other on the same level and 45 stands. A sealing part 28 is provided above the central opening of the storage unit in alignment with one another and to protect the two rollers Prevent transport surfaces 15 on one side of the trays from escaping compressed air. The above as well as two further transport surfaces at the ends of the annular groove 26 supports the compressed air supplied the row of tables 4 to be provided. Supply roll during unwinding of the paper

Fig. 10 shows an arrangement that of those 50 lane.

9 except that the trans- FIG. 14 shows a device similar to that

port surfaces 15 laterally next to the tables 4 according to FIG. 13, in which, however, the underside of the are arranged. Supply roll carries a massive plate 30, which the

It should be noted that the transport surfaces 15 perform the same task as that shown in FIG Can be used to store supply rolls, 55 sealing part 28.

before the supply rolls are used; since the so Fig. 15 shows an embodiment similar to the

stored rollers do not need to be moved, those according to FIG. 2, in which, however, the upper one can interrupt the supply of compressed air in this case centering device 5 b to a compressed air source 31. FIG. 11 shows an arrangement similarly connected, which is provided by a pivot connection of that of FIG. 2. In which, however, it is connected to the device 5 b at 60 32, which is a further embodiment, in which a central channel opens into a channel 33 modified device for generating a pressure within the supply roll 3. The compressed air supplied to the duct luftkisscns between the table and the underside 33 can be provided through ducts on which the supply roll is provided. This Ausfühnmgs- outside of a lower centering mandrel 5 a to form then proves to be particularly useful, 65 flow underside of the supply roll 3 to a pressure when only a single supply roll needs to be processed into air cushions between the table 4 and the roll 3. According to FIG. 11 is generate in the middle. · The device a recess 20 is provided, which can be The correct covering position of the webs

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set by changing the position of the turning bars 14 accordingly. Since the lower The end face of each supply roll, similar to the way a brake lining takes effect, can be determined that the braking surface is renewed every time a used supply roll is replaced by a new supply roll.

Claims (9)

Patent claims: IO t. Device for feeding and winding a web-shaped material with a supply roll, a tensioning roller adjustable by the web tension and a braking device which acts on the supply roll and is controlled by the adjusting movement of the tensioning roller, characterized by a table (4) on which one of the web-shaped Material existing supply roll (3) can support with an end face and which has a device (5.5 α to Sd) for centering the supply roll, a device (nozzles 6; annular groove 26) for generating a compressed air cushion between the top of the table and the lower end-streams of the supply roll as well as a compressed air supply valve (12) which is adjusted depending on the position of the tensioning roller (13) in order to supply compressed air from a compressed air source (11) to the device for generating a compressed air cushion between the table (4) and the supply roll (3). 2. Apparatus according to claim 1, characterized in that the web-shaped material is a Paper web (2) is that of a machine for Business manufacturing or processing Forms is fed. 3. Apparatus according to claim 1 or 2, characterized by turning bars (14), means: which the path moving in a vertical plane is rotated so that dii Track moved beyond the turning bars in a horizontal plane. 4. Device according to one of claims i to 3, characterized in that the clamping roller (13) by a lever (12 α) mechaniscl with the compressed air supply valve (12) ge is coupled. 5. Device according to one of claims 1 to 4, characterized in that the table (4 contains a compressed air channel (10) on the top of the table in below the supply roller (3) arranged nozzles (6) opens. 6. Apparatus according to claim 5, characterized in that each nozzle (·) one through one Spring (8) biased valve member (valve ball 7) includes, which is normally on his Seat rests and is closed, but is opened when the supply roll (3) is over dk Valve organs moved away. 7. Apparatus according to claim 6, characterized in that the provided by springs (8) cocked valve organs are valve balls (7). 8. Device according to one of claims 1 to 4, characterized in that the table (4] has an annular groove (26) to which compressed air can be supplied. 9. Apparatus according to claim 1 to 8, characterized in that the device increases Centering the supply roll (3) comprises a spindle (22) rotatably mounted in positions (21). For this purpose 3 sheets of drawings 109612/54 " 2142