SPREADER ROLLER

Description

[0001] The invention relates to a device with a spreader roller having a roller tube over which a material web is guided, said web being spreadable by bending the spreader roller along its longitudinal axis, with two bearing pins which are operatively connected to the roller tube and are pivotally mounted in a machine frame, according to the features of patent claim 1.

[0002] A device with a spreader roller is known from DE 103 41 119 A1. It proposes a roller tube configured with associated means for introducing bending moments. For this purpose, bearing pins are provided, which are attached to the machine frame via a pivot bearing. They can be pivoted via an adjustment mechanism, which leads to the introduction of a bending moment into the roller tube. The bearing pins engage the front ends of the roller tube. It is also provided to guide the roller tube at the bearing pins via two spaced-apart bearings. The roller tube is considerably tapered at its end, starting from the inner bearing, so that an uneven buildup of bending moments on the roller tube is to be expected.Furthermore, a guide roller for a web of paper or similar material is known, DE 196 01 844 A1, in which the shaft carrying a single or several individual guide rollers can be bent in order to equalise and adjust the pressure distribution on the web.

[0003] A device with a spreader roller according to the preamble of claim 1 is known from DE 32 21 011 A1.

[0004] The invention is based on the object of improving a generic device with a spreader roller in such a way that the described disadvantages are avoided.

[0005] This object is achieved by the features of patent claim 1

[0006] According to the invention, the bearing journals are mounted on the machine frame by means of pivoting bearings and these have longitudinal journals projecting beyond the bearings, at the end of which radially engaging adjustment means are arranged. The bearings are arranged approximately centrally on the bearing journal, with approximately one half being assigned to the spreader roller and the outer half, referred to as the longitudinal journal, projecting beyond the pivoting bearing. The bearing journal is therefore guided like a pendulum around the pivoting bearing on the machine frame. Depending on the design of the bearing journals, which can be designed to rotate with the roller tube and / or to be rotationally fixed to the machine frame, the adjusting means are designed to pivot the bearing journals. If the bearing journal rotates, the adjusting means have bearings engaging the longitudinal journal, with the adjustment means engaging the housings of which.The adjustment means, which exert a force on the bearing journal essentially perpendicular to the longitudinal axis of the journal, can deflect the opposite end of the journal and cause the roller tube to bend. The adjustment means can be actuated in the same or different ways.

[0007] Advantageously, the adjustment means are arranged so that they can rotate in the circumferential direction of the spreader roller, so that the direction of deflection of the roller tube can be aligned in the circumferential direction. The adjustment means are arranged on a sleeve that is pivotally mounted in the machine frame. The adjustment means can be rotated manually, but a rotary drive with a high gear ratio is preferably provided.

[0008] The adjusting means, in turn, can be arranged parallel to one another or at an angle offset with respect to the direction of action of the force for generating the bending moment.

[0009] The adjustment means, in turn, can comprise a threaded rod with a clamping nut, which in turn can be adjusted manually or by means of a drive element.

[0010] The pivoting bearing of the bearing journal is designed as a self-aligning bearing, preferably a multi-row spherical roller bearing, particularly when the bearing journal rotates.

[0011] The bearing journal can be implemented in the roller tube by means of two spaced-apart bearings, preferably designed as self-aligning bearings. In this case, the roller tube is assigned its own rotary drive. The roller tube preferably has a constant wall thickness along its entire length.

[0012] The bearing journals can also be fixed in the roller tube by means of a fit. In this case, the roller tube can be driven via one of the bearing journals.

[0013] In a further embodiment of the invention, it is proposed that the bearing journals are components of a shaft on which the roller tube is guided or in which the shaft itself is designed as a spreader roller.

[0014] In a further development of the invention, measuring means are provided, wherein the bending of the roller tube at the location of the adjustment means is determined by the measuring means. By detecting the bending of the roller tube, the bending can be specifically adjusted or, for example, regulated during operation by means of a corresponding control or regulation using the rotation means in order to maintain a largely constant predetermined bending.

[0015] An embodiment of the invention is shown in simplified form in the drawings.

[0016] They show: Figure 1: a side view of a device with a spreader roller, Figure 2: a section through the device and the spreader roller according to the line AA in Figure 1 , Figure 3: a side view of a device with a spread roller in a modified embodiment, Figure 4: a side view similar Figure 3 seen from the opposite side, Figure 5: a section through the device according to the line CC in Figure 4 , Figure 6: a transverse view of a device with a spreader roller and Figure 7: a section through the device according to the line AA in Figure 6 .

[0017] In the Figures 1 to 7As far as shown in detail, reference numeral 1 designates a machine frame in which a spreader roller, designated by reference numeral 2, is mounted and guided. The spreader roller 2 has a roller tube 3 which is operatively connected to bearing journals 4 on both sides. At the point where the bearing journals 4 protrude from the roller tube 3, which is approximately the middle of the bearing journals 4, the journals are mounted on the machine frame 1. These are pendulum bearings, since the bearing journals 4 are pivoted around these points. The outer end of the bearing journals 4, designated as the longitudinal journal 5, has bearings 6 on which adjusting means 7 engage, by means of which the end of the bearing journals 4 can be pivoted radially. The adjusting means 7 have a threaded rod with a clamping nut 8, wherein the clamping nut 8 is supported on a sleeve which is pivotally mounted in the machine frame 1.The clamping nut 8 can be operated manually or by a drive element. By rotating the sleeve together with the adjusting means 7 using the rotating means 9, the direction in which the bearing pins 4 can be pivoted can be changed, thus allowing the roller tube 3 to be bent.

[0018] The roller tube 3 can be guided onto the bearing journal 4 by means of two bearings arranged at a distance from one another. The roller tube 3 is then driven by an independent drive device. If the bearing journals 4 are in the roller tube 3, as shown in the Figures 5 to 7 shown, the drive of the bearing pins 4 and the roller tube 3 can take place simultaneously.

[0019] The bearing journals 4 can also be arranged according to the Figures 6 and 7 Components of a shaft on which a roller tube 3 is attached. It is also possible that the shaft itself is designed as a roller tube. List of reference symbols

[0020] 1Machine frame 2Spreader roller 3Roller tube 4Bearing journal 5Longitudinal journal 6Bearing 7Adjustment device 8Clamping nut 9Rotation device 10Measuring device

Claims

1. Device with a spreader roll (2), which has a roll tube (3), over which a material web is guided, said material web being spreadable by bending of the spreader roll (2) along its longitudinal axis, having two bearing journals (4), which are operatively connected to the roll tube (3) and are pivotably articulated in a machine frame (1), wherein the bearing journals (4) are mounted on the machine frame (1) by means of pivotable bearings (6) and said bearing journals have longitudinal pins (5) projecting over the bearings (6) and at the ends of which radially engaging adjustment means (7) are arranged, characterized in that the adjustment means (7) have bearings which engage on the longitudinal pin (5) and on the housings of which the adjustment means (7) engage, wherein the adjustment means (7) are pivotably arranged in the circumferential direction of the spreader roll (2), and wherein the adjustment means (7) are arranged on a sleeve, which is pivotably mounted in the machine frame (1) and provided with torsion means (9), and a rotary drive is assigned to the torsion means (9).

2. Device according to Claim 1, characterized in that the adjustment means (7) have a threaded rod with a clamping nut (8).

3. Device according to Claim 2, characterized in that the clamping nut (8) is assigned a torsion element.

4. Device according to any one of the preceding claims, characterized in that the pivotable bearing (6) is designed as a self-aligning bearing, preferably a multi-row self-aligning roller bearing, and is arranged approximately in the longitudinal centre of the bearing journal (4).

5. Device according to any one of the preceding claims, characterized in that the bearing journals (4) are guided in the roll tube (3) by means of two spaced bearings, which are preferably designed as self-aligning bearings.

6. Device according to any one of the preceding claims, characterized in that the bearing journals (4) are fixed in the roll tube (3).

7. Device according to any one of the preceding claims, characterized in that the bearing journals (4) are components of a shaft on which the roll tube (3) is guided.

8. Device according to any one of the preceding claims, characterized in that the adjustment means (7) are arranged parallel or offset from one another at an angle with respect to the operative direction of the force for generating the bending moment.

9. Device according to any one of the preceding claims, characterized in that measuring means (10) are provided, wherein the bending of the roll tube (3) at the location of the adjustment means (7) is determined by the measuring means (10).