FI89701C - Wheelchair and procedure for adjusting the press of a wheelchair - Google Patents

Description

89701

BACKGROUND OF THE INVENTION The present invention relates to a winding device comprising a first rotating roll and a second rotating roll forming a nip, to which a web is applied and after which a nip is applied to the nip. the web being wound on said second rotary roll, the second rotary roll being supported by winding rails or the like, the winding device comprising first means for adjusting the position of the second rotary roll relative to the first rotary roll to adjust said nip pressure, the first members comprising winding rails or like.

The invention also relates to a method for adjusting nip pressure in a winding device 15 comprising a first rotating roll and a second rotating roll forming a nip to which nip is fed, and after which the web is wound on said second rotating roll, the second rotating roll supported by winding rails or the like, wherein the method for changing the relative position of the first rotary roll and the second rotary roll of the winding device 20 includes tilting the winding rails or the like.

In fastening at the beginning of the winding, due to the bending of the reel irons or reel rolls, it is problematic to achieve a uniform line or nip load between the reel and the reel cylinder by known methods. In the primary ejection, the load on the reel roll results in a significantly higher line load in the middle of the edges. In secondary winding, the loading effect of the winding forks causes a greater line load on the edges than on the center.

In the event of replacement of some reels, e.g., a pope reel, from the primary rails to the secondary rails, discontinuities between the reel cylinder and the reel spool are easily caused, e.g., by line pressure spikes, which cause a bottom rupture.

8970 Ί 2

With reference to the prior art, reference is made to GB-A-2 009 108 which discloses a roller device in which the nip pressure acting members are arranged to change the position of the second rotating roll relative to the first rotating roll and the first members comprising inclining changing members.

5

It is an object of the invention to provide such a roller which does not have the above problems. It is a particular object of the invention to provide a roller having a uniform nip load between the reel roll and the winding cylinder. It is a further object of the invention to provide a roller which does not exhibit discontinuous imaging causes.

In order to achieve the foregoing and later objects, the coil device according to the invention is essentially characterized in that the coil device comprises second means for providing additional forces at the ends of the second rotating roll to adjust the axial loading of the second rotating roll.

The method according to the invention is essentially characterized in that the method exerts additional forces on the ends of the second rotating roll in a direction perpendicular to the axis of the roll.

• 20

The line loading is achieved by equilibrium in the cross machine direction by placing a reel iron or roll relative to the winding cylinder so that the force component passing through the center points of the reel iron and the winding cylinder forms the force required for line or nip loading. The line load is adjusted to change the position of the 25 bar reel iron relative to the winding cylinder, thereby changing the magnitude of the force component causing the line load. A suitable line or nip load is thus provided by the own weight of the reel roll and the web rolled thereon. The web winding of the reel roll against the reel cylinder is commenced at a point where the force component parallel to the center of the earth pulling force on the reel roll is 30 suitable to form a line load.

8 9 7 O '1 3

Variation of the power component is accomplished in a number of different ways, e.g., by adjusting the inclination of the winding rails or forks. As the size of the swab increases, the inclination is reduced to a suitable level.

In accordance with the invention, discontinuities occurring in the paper roller changing or transfer operation from the primary rails to the secondary rails can be eliminated, for example, by starting the winding directly from the rails.

When the full reel rotates on the secondary rails, it is moved to the stopping position, after which the primary rails can be moved to the optimum incline position for line pressure so that the line load, or line pressure, is uniform across the machine. As the size of the reel increases as the scrolling progresses, the inclination angle of the primary rails is reduced. The changeover, i.e. transfer to the secondary rails, is effected by moving the secondary rails to a corresponding inclination angle with the primary rails, whereupon the replacement reel rolls over the extension 15, during and after which the primary and secondary rails move synchronously adjusting the line load.

According to the invention, additional forces exerted on the ends of the reel or roll are perpendicular to the axis of the roll, whereby the transverse nip or line loading of the machine 20, i.e. the reel axis, can also be controlled and controlled by additional forces. If desired, by the aforementioned adjustment measures, to influence the transverse line load profile while maintaining the total line load level constant, the inclination angle can be adjusted so that the effect of additional forces on the total line load level is compensated.

25

The method according to the invention is well applicable for starting winding directly from the rails. Geometric load control can then be utilized. As the roll of paper formed on the reel roll increases, the line loading effect of the earth's gravity decreases.

·; ·; 30 8 9 7 01 4

Other advantages are achieved by the system of the invention. For example, there is no changeover at the beginning of the roll, and the load situation can be seen in nature by observing the slope of the rails. Furthermore, the solution according to the invention avoids sudden line pressure and other load changes and the adjustment of the line load 5 according to the invention is mechanically easy and easy to control technically.

In the following, the invention will be described in more detail with reference to the figures in the accompanying drawings, to which, however, the invention is not limited in any way.

Figures A and B schematically illustrate some of the prior art nip or line loading problems which the invention is intended to solve.

Figure 1 schematically illustrates a winding event in the initial phase of winding.

Figure 2 schematically illustrates a winding event at the end of the winding.

Fig. 3 schematically illustrates an arrangement according to the invention for providing a uniform line or nip pressure.

Figure 4 schematically shows an additional embodiment of the invention.

Figure 5 schematically illustrates an embodiment of the arrangement of the invention suitable for use in endless winding.

Figure 6 schematically illustrates another embodiment of the arrangement of the invention suitable for use in endless winding.

Fig. 7 schematically shows an arrangement according to the invention fitted in connection with an exchange event.

30 5 897C1

As shown in Figure A, in the primary winding, the line load between the winding cylinder 15 and the reel roll 20, i.e. the reel roll 20, is greater in the middle than at the edges. The line load in the middle is indicated by arrows Z. The greater line load in the middle is due to the supporting action of the reel roll 20, schematically indicated by the arrows X. 5

Figure B shows how, in secondary winding, the loading effect of the spool roll 20, schematically indicated by arrows X2, exerts a greater load Z2 on the edges than on the center.

10, the web, e.g., paper web W, is wound from a first roll, i.e. a winding cylinder 15, to a second roll, i.e. a reel 20, both rollers 15,20 being rotatable and forming a nip N into which nip W is introduced and a rotating roll or reel roll 20 supported by the winding rails 10.

15

According to Figure 1, the winding of the web W on the spool roll 20 against the winding cylinder 15 is started at a point where the Gr component of the earth pulling force G parallel to the center of the winding cylinder 15 is suitable. In this case, the line load acting on the nip N is uniform across the machine and does not rise too high in the center. In the figure, the direction of rotation of the blade 15 of the winding roller-20 is denoted by the reference S1 and the direction of rotation of the reel roll or iron 20 by the reference S2. The reel roll 20 is supported by the winding rails 10.

According to Fig. 2, geometrical load control is utilized. 25 As the web reel wound on the reel roll 20 increases, the line loading effect of the earth's gravity G decreases, i.e. the angle / 91 </ 92.

As shown in FIG. force component. The line loading is adjusted by changing the position of the reel iron 20 relative to the winding cylinder 15 such that the nip point N changes and at the same time the magnitude of the force component Gr causing the line load changes. The adjustment of the force component Gr is most easily accomplished by adjusting the inclination or angle α of the winding rails 10. In this case, the line load is Gr = G · sin a, i.e. the weight of the reel 20 and the weight of the reel web. to maintain a steady line or nip load, preferably from about 20 ° to about 1 °.

10

The inclination angle of the roller rails 10 is adjusted by means of an actuator, for example a screw jack 30, a cylinder or the like. Many known arrangements are suitable for adjusting the inclination angle α. The winding rails 10 are pivotally attached to the winding cylinder 15, preferably the winding rails 10 are pivotally centered on the winding cylinder 15.

As shown in FIG. and adjust. If the aforementioned adjustment measures via the auxiliary forces F influence the transverse line load profile while maintaining the total line load dimension constant, the inclination angle α can be adjusted so that the effect of the auxiliary forces F on the total line load level is compensated.

25

The transverse or axial line load or nip load of the spool roll 20 is adjusted in the middle by changing the mutual position of the winding cylinder 15 and the spool roll 20 e.g. by changing the inclination angle a The auxiliary forces F increase or decrease the nipple load in the peripheral areas. The total line load is thus adjusted to the desired nip.

According to Fig. 5, the anti-roll system according to the invention is suitable for use when the winding 5 is endless. Figure 5 shows a structure using two systems of winding rollers 15 to rail 10. In Figure 5, the guide rollers of web W are denoted by reference numeral 25. As shown in the figure, as the size of the spool 20 increases, the angle α is reduced. After the first reel 20 has been filled, the web W is led to a second winding system which operates in a similar manner.

10

Figure 6 illustrates another possibility of a system using two systems of a roller cylinder 15-rail 10. The web W is guided through guide rollers 25 to a winding cylinder 15, from which further to a reel roll 20 supported by the rail 10, the web W is guided to another winding system. Fig. 6 is a dashed line showing the position of the rails 10 and the reel 20 when the reel is full.

As shown in Fig. 7, for example, the change of the pop-reel from the primary rails 10 to the secondary rails 11 is performed by replacing the primary rails 10 with the full reel 20 rotating on the secondary rails 11. The full reel 21 is moved to a braking position. The line pressure, or line load Gr, is uniform throughout the transverse direction, Gr = G sin a. As the mandrel 20 increases, the angle α is reduced as the mandrel 20 continues to increase in diameter. The transfer to the secondary rails 11 is effected by moving the secondary rails 11 to the corresponding angle α with the primary rails 10, whereby the replacement reel rolls over the extension, during and after which the primary rails 10 and secondary rails 11 move synchronously to adjust the line load. The secondary rails 11 may also be fixedly fixed, whereby the line load adjustment is effected at that particular point. on rails 11 normally with the help of the fork rollers.

The invention has been described above with reference only to some preferred embodiments thereof. However, this is in no way intended to limit the invention to these Examples 8 8 9 7 G1, but many modifications and variations are possible within the scope of the inventive idea * as defined in the following claims.

Claims (2)

A wheelchair assembly comprising a first rotating roller (15) and a second rotating roller (20) forming a nip (N) into which the nip (N) inserts the web (W), and in which nip (N) a nip pressure (Gr) acts on the web (W) and after which the nip (N) web (W) is wound on said second rotating roller (20), said second rotating roller (20) being supported on rolling rails (10) or the like; said wheelchair assembly comprising first means (30) for changing the position of said second rotating roller (20) in relation to said first rotating roller (15) for regulating said nip pressure (Gr), said first means 10 (30) including said tilt changing means; (a) by the rolling rails (10) or vice versa, characterized in that the wheelchair assembly comprises other means (35) for providing additional forces (F) at the ends of the second rotating roller (20) for controlling the axial line load of the second rotating rollers (20). 15 A method of controlling the nip pressure in a wheelchair device comprising a first rotating roller (15) and a second rotating roller (20) forming a nip (N) into which the nip (N) web (W) is inserted and inserted into the nip. which nip (N) a nip pressure (Gr) acts on the web (W) and after which nip (N) the web (W) is wound on said second rotating roller 20 (20), which second rotating roller (20) is supported on rolling rails (10) or the equivalent, in which a method for changing the mutual position between the first rotating roller (15) and the second rotating roller (20) is carried out on a slope of the rolling rails (10) or the like, characterized in that at the method causes additional forces (F) at the ends of the second rotating roller (20) in a perpendicular direction to the axis of the roller.