FI105468B - Device for pressing the roll - Google Patents

Description

105468

Device for pressing the roll

The invention relates to an apparatus for pressing a roll in a paper web roller, in particular at the end of the web winding, whereby, in the roll change condition, the full roll is moved to the exchange position after cutting the web to prevent loosening of the roll surface layers.

During transfer of the full roll to the exchange position and during braking and stopping of the roll rotation movement, there is usually a loosening of the surface layers 10, whereby so-called air is introduced between the surface layers. nip in open roll because the roll cylinder and roll are no longer in contact with each other. The quality of the roll for the surface layers is then substantially reduced, which means that there is an additional need for paper shredding. At high speeds, the need for a wreck can be up to several hundred meters.

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Particularly with the increase in efficiency requirements, it has become necessary to shorten the stopping time of the full roll after the web has been cut off. This is likely to increase the loosening problems, since some of the surface layers tend to continue their movement at their former speed in the direction of roll rotation, i.e. opening direction, regardless of the speed of rotation of the innermost layers. If air is trapped between the surface layers during the nip roll, the risk of loosening during braking is considerable.

·. ·. To overcome the problem of loosening shown, solutions are known which prevent air from entering between the paper layers by applying at least a radial loading effect to the roll surface. As load units'; · *! is known in the art e.g. brush devices, various belts or printing rollers, and solutions based on their use are disclosed e.g. Patent Publication: .v 30 in EP-483 092, EP-658 504 and EN-95683 (the corresponding international patent application.

v. Publication No. WO 95/34495), the latter of which will be described in more detail below by way of example.

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According to said publication, the loading member may be so-called. piece roll or so called.

“35 knuckle bars, but especially mention is made of the wide brush device designed to press the surface of the roll. The brush device is attached to a carriage which is: ·· / * arranged to move in the longitudinal direction of the roller along a guide arrangement, and: transfer cylinder.

With these arrangements, the brush device is moved to a load contact with the surface of the roll, substantially to the underside of the roll, at the end of the roll, and the brush device is transported in a load contact with the full roll when the roll is moved by rollers. The brush device is arranged to be pivotable up relative to the trolley with a view to finishing the roller surface layers when the trolley collided with the trolley. It is also disclosed that the rotation of the brush device may be accomplished by a separate actuator, whereby the brush device may be moved away from the surface of the inflatable roll to maintain a desired contact with the surface of the roll 10.

The brush device thus follows the filler roll as it is moved to its replacement position, whereby the amount of the load effect can only be influenced by adjusting the power of the actuator moving the carriage. It is clear that such an arrangement whereby the same actuator is intended to both move the carriage and its accompanying ridge actuator and to influence the radial loading effect, allows the loading effect to be regulated only roughly, and the momentary elastic -20 list is affected. The control of the loading effect is ultimately limited, even in an application comprising an actuator for rotating the brush device, to utilize exclusively the movement of the brush device away from the surface of the roll as the roll increases.

·. ·. 25 The basic problem with the aforementioned brush devices is the control of motion and load with the same actuators. In certain solutions, the movable / pivotable mass produces dead weight, which limits the adjustability of the load;

It is an object of the present invention to provide a device for printing a roll, V; with which device the above-mentioned drawbacks of the known solutions can be eliminated to the greatest extent and thus the state of the art is improved. To accomplish this purpose, the device according to the invention is essentially characterized in what is set forth in the characterizing part of claim 1 of the accompanying claims. Load member: "The carrying wagon consists of two parts, namely a moving member for carrying the wagon substantially in the longitudinal direction of the roller and a large part to which the load member is connected and connected to the transfer member by a load adjusting member. movement of the trolley and contacting the load member with the surface of the roller is accomplished by one actuator and load control mainly by the second actuator, which means that the load is adjustable independently of the movement of the transferring part 5 throughout the load contact. Similarly, the load member may be flexible under constant load as the parts move farther apart when moving the load member into contact with roll 10 and as the roll increases fluctuate at any point in the load contact between the minimum load and the maximum load, and moreover, said variation can be realized quickly.

Other features of the device according to the invention will be apparent from the appended dependent claims and the description which follows.

The invention will be described in more detail in the following description, with reference to the accompanying drawing, in which Figure 1 illustrates a situation in which the device is used in a paper web roll. Figure 2 shows a side view of the device before the load contact, and Figures 3-5 show side view of the device during the load contact.

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Figure 1 shows a paper roll reel known per se, in which the machine 30 is used. This is a continuous-action reel that rolls • · · v; a continuous paper web W from the preceding portions of the papermaking or paper finishing machine about successive machine rolls R around the reel rolls 2. The reel rolls 2 are supported at the ends of the reel by a suitable support structure, such as reel rails. Fig. 1 illustrates a situation in which the machine roll R '#' which has been fully completed to replace the roll is removed by winding trolleys 12 connected to the ends of the spool roll 2 from the winding cylinder 1 through which the paper web W is rolled through the winding nipple. the tapered friction between the web run and the outer surface of the roller 105468, from which the air tends to penetrate the roller, is indicated by arrow G.

Figure 2 illustrates a situation in which the roller R is inflated, but still through 5 winding nips N in contact with the winding cylinder 1. The device for pushing the roller - hereinafter briefly referred to as "the device" - is in the starting position ready for loading contact with the roller surface. The device consists essentially of a carriage V, a guide arrangement J guided by the carriage V to move in the longitudinal direction of the roller, a loading member 3 such as a press roll, a load adjusting member 4 and actuators (not shown)

The carriage V consists of two parts, namely a transferring part 10 and 15 a loading part 11. The transferring part 10 for moving the carriage V, guided by the horizontal guide arrangement J, is connected to the first linear guide 5 of the guide arrangement J via a gear 7 or the like. is a toothed rack or the like, and the actuator 20 for movement is preferably a pneumatic motor or the like.

The load part 11 to which the load member 3 is connected is arranged to follow the transfer part 10 during the movement by which said parts of the carriage V are connected to one another by means of a load adjusting device. 25 means 4, which according to the preferred embodiment shown in the figures is molded. made of pneumatic cylinder-piston assembly (pneumatic: .V cylinder). The parts are arranged by linear guides 5, 6 of the guide arrangement J relative to each other along a given path of movement, e.g., linearly · · · /. This linear relative motion is accomplished by arranging portions 10.11 of the same or parallel linear guides 5,6; directs why.

In the applications of the figures, the cylindrical portion of the load adjusting member 4 is disposed on the loading portion 11 and the free end of the piston rod is secured to the displacement portion 10, but it is clear that the assembly portions may be reversed. Also, the loading member 11 is adapted to move under the control of a guide arrangement J, which preferably comprises two linear guides, namely the aforementioned first linear guide, · · r 5 105468 5, such as a toothed rack, and a second linear guide 6, controlling the movement of the V parts of the wagon.

When the device is in its initial position before the load contact, the distance between the transferring portion 10 and the loading portion 11 is preferably the smallest (Figure 2), whereby the volume of the piston rod chamber of the compressed air cylinder is maximum. At this stage, it is also expedient to maintain a pressure in the cylinder corresponding to the pressure required by the loading effect.

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Before the roller R is moved to the exchange station, the loading member 3 is brought into contact with the surface of the roller R by moving the carriage V by its moving part 10 in the direction of movement of the roller carriages 12 - the D moving part 10 and the loading part 11 being further minimized. The loading of the loading member 3 against the surface of the roller R is then determined by the pressure in the compressed air cylinder, which has already been set to the desired line load even before the loading portion is moved to the contact. When the loading member 3 comes into contact with the surface of the roll, the loading member 11 stops. The moving part 10 is further advanced in the longitudinal direction of the roller towards the stop 9, whereby in order to maintain an optimum load, the distance between the V parts of the carriage increases with the so-called cylinder-piston assembly of the load adjusting member 4. when flexing, that is, as its length increases and the volume of the piston rod chamber decreases, the prevailing volume in the chamber. 25 while the pressure still corresponds to the desired load effect. Said elasticity of the cylinder-piston assembly may be nearly the length of the piston rod chamber, which significantly expands the application range of the device, for example, according to the diameter of the roller R. For large diameter rolls R, the elasticity can be: · '] ί almost cylindrical piston assembly full length change capability: .v 30 (elastic) and for small rolls R a few centimeters.

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Figure 4 illustrates a situation in which the transferring member 10 has reached its extreme position with respect to the winding carriage 12. An end position limiting movement limiter 9 is disposed within the scroll carriage 12 to stop the movement of the transferring member 10 relative to the scrolling carriage 12, whereby the distance between the transferring member 10 and the load-carrying portion 11 is also maximized. After the movement of the moving part 10 with respect to the winding carriage 12 is completed, the winding carriages 12 may be

: · Moves the roller in the longitudinal direction towards the exchange station, whereby the roller R

The 105468 moves with them and the scroll nip N opens. The movement of the carriage V continues with the movement of the carriage 12 towards the exchange station D by means of its own motor (pneumatic motor) of the carriage V while the load continues with the load adjusting means 4 according to the requirements of the rollover mode 5. In this step of transferring roller R, the loading member 3 presses the topmost layer of the web W against the roller to prevent air from entering underneath the layer.

The return of the carriage V back to its starting position is accomplished by a pneumatic motor 10 simply by reversing the direction of movement of the directional valve, whereby also the parts 10 and 11 coincide under the action of the load control element 4.

Figures 2-5 show the device viewed from the end of the roller R, thus representing only 15 parts of the assembly. Both the transferring portion 10 and the loading portion 11 are comprised of two portions such that substantially corresponding members are disposed at one end of the roller R, preferably including a load adjusting member 4, a guide arrangement J and a motion limiter 9 in the winding carriage 12. and in particular between the portions of the transferring portion 10 for synchronizing their movements. According to the preferred embodiment shown, it is the synchronization shaft 8 which is formed, at least with respect to its ends, into the aforementioned gear wheels 7. The parts 10 and 11 can be located at the lower part of the roller at such a movement height. 25, so that they fit under the maximum diameter roller R, and the guide arrangement J [.m'm] can be placed at a suitable height, e.g., below the winding rails.

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The operation of said bodies is controlled by control systems known per se and / or by automation applications. The pressure of the load adjusting element 4 can be set to the desired pressure · · ·: valve. If a compressed air motor and actuator (pneumatic motor and pneumatic cylinder) are used for both transmission and load, the compressed air they require will be obtained by suitable connections from the same ** ': compressed air source.

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The loading member 3 is rigidly attached to the loading member 11 at least: ··· 'such that the loading force is determined by the force · of the loading member 4. If the loading member 3 is a press roll, it is bearing 7 105468 on a rotatable arm which is attached to the loading member 11 in an upwardly oblique manner.

It will be appreciated that the loading member 3 may function other than the press roll 5, for example a brush device or the like, which is placed in the loading member 11 corresponding to the press roll. In addition, the invention is not limited to only the 10 embodiments shown above and according to the drawing, but may vary within the scope of the inventive idea set forth in the appended claims. For example, the loading member 3 can be brought in the opposite direction, i.e. behind the roll R, so that the transfer portion 10 and 15 loading portion 11 can then be used, which would then move against the roll R direction. However, the position of the loading member 3 according to the figures is most advantageous in terms of preventing air access. Likewise, it could be contemplated that parts 10 and 11 may be brought in the reverse order of those shown in Figures 2-5, i.e., load part 11 above, whereby the load adjusting member 4 would be shortened, but space problems would occur and the positioning of the motion limiter 9 become more complex.

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Claims (13)

Apparatus for printing a roll in the wheelchair of the paper web, comprising: - a roll (R), in particular its surface layers, at least radially loaded load means (3) to prevent the roll (R) from slackening, - a trolley (V ), to which the loading device (3) is connected, 10. actuator for transporting the carriage (V) in the longitudinal direction of the wheelchair, characterized in that the carriage (V) comprises at least two parts, namely - a transmitting part (10) for transporting the carriage (V) in the longitudinal direction of the wheelchair, and - a load-bearing part (11), to which the load-carrying device (3) is connected, and the transmitting part (10) and the load-bearing part (11) are connected to each other so that be movable relative to each other with a control device (4) for the load, which is arranged to control the load provided by the load device (3). 25! ·. ·. Device according to claim 1, characterized in that the transferring member (10) and the loading member (11) are arranged movable relative to each other according to a defined path, such that when the load member (3) is in a *; / load contact the transmitting part (10) is allowed to disengage from the load part (11). • · «* · · 3. Device according to claim 2, characterized in that the parts (10, 11) are arranged movable relative to one another along a rectilinear path. • · «• <« 4. Device according to claim 2 or 3, characterized in that the transmitting part (10) and the loading part (11) are arranged movable in the longitudinal direction of the wheelchair under the control of a conduit arrangement (J). 4 «t 4 11 105468 Device according to any of the preceding claims, characterized in that both the transmitting part (10) and the loading part (11) consist of two parts located at a distance from each other in the transverse direction of the wheelchair, preferably at the ends of the roller (R). Device according to claim 5, characterized in that the parts of the carriage (V) spaced apart, in particular the parts of the transmitting part (10), are synchronized with each other by a synchronizing shaft (8) or the like. Device according to claim 6, characterized in that one or more gears (7) or the like are arranged in the synchronization shaft (8) or the like and that the linear guide (s) (5) controlling the carriage (V) is gear rods or the like, wherein as a power transmission means to effect the movement of the transmitting part (10) from the actuator, a gear-rack combination / combinations or the like functions. Apparatus according to any of the preceding claims, characterized in that the load regulator (4) consists of at least one pressure medium driven cylinder-piston combination. 9. A device according to claim 8, characterized in that the cylinder piston. ': The combination is compressed air driven. I I <I <· <. ···. Device according to any of the preceding claims, characterized in that the load device (3) consists of a pressing roller or the like. 30 ··· 9 9 Device according to any of claims 1-9, characterized in that the load device (3) consists of a brush device or the like. ♦ ** · • · «· ··. \ "Ί Device according to any of the preceding claims, characterized in that the movement of the transmitting part (10) is effected. The next actuator is a compressed air motor. 4 (4) 1 ((12 105468) Device according to any of the preceding claims, characterized in that in the moving part of the roller (R), as in a rolling carriage (12), a movement limiter (9) is arranged to stop the movement of the transferring part ( 10). «·« · In inheritance · · · «·» · • M • «f · · t ··« · • · t · · t · «t · M · •« · • · · ·· · • <tf · · # • · · iri I r • I «« • I · «« i «• I« I «Il IIII • I« f III «« a