Spreader roll

Abstract

The invention relates to a device, comprising: a spreader roll (2), the spreader roll having a roll tube (3), over which a material web is guided, the bending of the spreader roll (2) about its longitudinal axis allowing the material web to be spread out; and two bearing journals (4), which are operatively connected to the roll tube (3) and are pivotably articulated in a machine frame (1), the bearing journals (4) being mounted on the machine frame (1) by means of pivotable bearings (6) and the bearing journals having longitudinal pins (5) protruding beyond the bearings (6), at the ends of which longitudinal pins radially acting adjustment means (7) are positioned.

Claims

1. An apparatus comprising: a machine frame; a spreader roll having a roll tube over which a material web is guided so that bending of the spreader roll relative to its longitudinal axis can spread the web width-wise; respective bearing pins fixed in ends of the roll tube and projecting axially outwardly therefrom; respective sleeves pivotable about the axis in the frame and surrounding the bearing pins; respective inner bearings in the sleeves, pivotable therewith on the machine frame, and in which the bearing pins are journaled, the bearing pins having axially outer ends projecting axially outward past the respective inner bearings; respective outer bearings on the outer ends of the pins offset axially outward from the respective inner bearings; respective radially acting adjusters braced radially between the sleeves and the respective outer bearings for bending the roll; and rotary drive means for moving the sleeves and adjusters angularly of the frame for adjustment of an angular position of bend of the roll.

2. The apparatus according to claim 1, wherein the adjusters each have a threaded spindle with an adjustment nut.

3. The apparatus according to claim 2, wherein the adjustment nut has a rotary drive.

4. The apparatus according to claim 1, wherein the pivotable bearings are self-aligning multi-row ball bearings each approximately in an axial center of the respective bearing pin.

5. The apparatus according to claim 1, wherein the bearing pins are each supported in the roll tube by two respective axially spaced self-aligning bearings.

6. The apparatus according to claim 1, wherein the bearing pins are fixed in the roll tube.

7. The apparatus according to claim 1, wherein the bearing pins are part of a shaft carrying the roll tube.

8. The apparatus according to claim 1, wherein the adjusters with regard to the effective direction of the force for generating the bending moment extend parallel or at an angle to one another.

9. The apparatus according to claim 1, further comprising: a sensor for determining bending of the roll tube at the adjusters.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) An embodiment of the invention is shown in simplified form in the drawings. Therein:

(2) FIG. 1 is a side view of an apparatus with a spreader roll,

(3) FIG. 2 is a section through the apparatus and the spreader roll along axis A of FIG. 1,

(4) FIG. 3 is an end view of an apparatus with a spreader roll of modified design,

(5) FIG. 4 is an end view opposite that of FIG. 3,

(6) FIG. 5 is a section through the apparatus according to line V-V,

(7) FIG. 6 is a side view of an apparatus with a spreader roll, and

(8) FIG. 7 is a section through the apparatus according to line VI-VI of FIG. 6.

SPECIFIC DESCRIPTION OF THE INVENTION

(9) FIGS. 1 to 7, as far as shown in detail, illustrate a machine frame 1 holding and supporting a spreader roll 2 rotatable about its center axis A by a drive 16. The spreader roll 2 has a tube 3 with ends secured in respective bearing pins 4. Outer ends 5 of the bearing pins 4 project axially from respective ends of the tube 2 and are journaled approximately in their axial middles in the machine frame 1 in respective pivotal inner bearings 6. The outer ends 5 of the bearing pins 4 are seated in outer bearings 11 and are engaged radially by respective adjusters 7 for pivoting. The adjusters 7 each comprise a threaded spindle 12 with an adjustment nut 8 supported in turn on a sleeve 15 pivotably mounted in the machine frame 1 and holding the respective bearing 6. The nut 8 can be operated by hand or by a drive 13. Rotating the sleeve 15 together with the adjuster 7 by a rotary drive 9 can change the direction in which the bearing pins 4 are pivoted and thus the direction of bend of the roll tube 3. Position sensors 10 are provided for detecting deflection of the pins 4 and form part of a controller or control means.

(10) The roll tube 3 can be supported on each of the bearing pins 4 by two axially spaced bearings. The roll tube 3 is in this case driven by an independent drive. When the bearing pins 4 are fixed in the roll tube 3 as shown in FIGS. 5 to 7, the same drive rotates both the bearing pins 4 and the roll tube 3.

(11) The bearing pins 4 can, as shown in FIGS. 6 and 7, be parts of a shaft 14 on which the roll tube 3 is fixed. It is also possible that the shaft 14 itself forms the roll tube 3.