DE2139159B2 - Device for spreading webs of material, in particular webs of paper - Google Patents

Description

The invention relates to a spreader roller for running webs of paper or plastic Od. The like., which consists of a large number of individual roller sections.

Spreader rollers are mainly used wherever webs made of paper, foils, fabrics or the like. Be processed. They serve to avoid the formation of creases in the webs of material that caused by different stress curves in the plane of the web. The effects These tension differences show up in the form of loose web edges or individual sagging Setting the tensioned material web.

Already known spreader rolls generally consist of a flexible shaft on which one A large number of individual roller sections are mounted, which in turn are covered by one over the entire length extending rubber or plastic jacket are coated. The degree of curvature is taking into account the working width of the paper web and the property of the paper are selected and set. In these known rollers, the curvature runs from the center of the roller to the both axle bearings symmetrically. The disadvantage arises that with different loose web edges only one side of the web is stretched while the other side is still prone to wrinkling. If the web edges are loose on one side, there is a risk that the web zone will over-rotate the compensation is not required.

Another disadvantage of these spreader rolls is that the axis of the roll is under tension is curved, resulting in high bearing loads. In addition, prepared the substitution individual roll sections difficulties, since the entire spreader roll must be removed. One has therefore gone over to using adjustable squeegees, the curvature of which is different is adjustable and can be adapted to the respective requirements.

The main disadvantage of such a squeegee is to be seen in the fact that after a short time Operating time on the bar more or less strong depending on the type of paper and surface coating Build up debris that will mark the paper web.

The invention is based on the object of eliminating the aforementioned disadvantages and a concurrent To create spreader roll that when loose web edges or individual sagging occur Places in each area of the paper web can be adjusted locally and in the case of the individual roller sections can be replaced without removing the entire spreader roller.

This object is achieved according to the invention in that, starting from a spreader roller for running material webs made of paper or the like, consisting of a large number of individual freely rotating roller sections consists, with between the sections consisting of individual rollers optionally and independently adjustable, the degree of curvature-determining support bearings are provided, the arrangement is made so that each freely rotatable roller on a substantially corresponding to the length of the roller Axis is mounted, the support bearing in the contact area of two adjacent, the rollers load-bearing and positively interconnected axes are arranged.

A particularly advantageous embodiment of the inventive concept can be seen in the fact that the support bearings consist of two parts, the parting line running transversely to the center of the axis and this intersecting.

The advantages achieved by the invention are in particular that the spreader roller in each Area of their curvature is variable, so that loose web edges or individual sagging Places in the specific and limited width area of the paper web through only effective in this area any changes in the curvature of the spreader roll can be corrected. Another advantage can be seen in the fact that storage is complete due to the easy interchangeability of the roller sections Rolling is superfluous.

An embodiment of the invention is shown in the drawing and will be described in more detail below described. Show it

Fi g. 1 shows a general view of the spreader roller,

F i g. 2 a section along the line 2-2,

F i g. 3 shows an enlarged section of an individual roller section,

F i g. 4 a section along the line 4-4,

F i g. 5 shows a section along the line 5-5.

Like F i g. 1 shows, the spreader roller 1 is on a traverse mounted pivotably by means of axles 2 3 arranged in an arc. It consists of individual roller sections 4, which are mounted on axles 5 so that they can rotate freely. The attachment of each Roll sections 4 on the traverse 3 are carried out by split support bearings 6 and adjusting bolts 7. The adjusting bolts? are each rotatably arranged in a bar 8 of the support bearing 6. The two support bearing halves 6 ' and 6 ″ are connected to one another by the strip 9 and screws 10.

To replace individual roller sections 4, the strip 9 can be removed by loosening the screws 10 and so the support bearing half 6 ″ can be removed. This results in easy interchangeability of the individual roller sections 4 without the complex removal of all of the roller sections 4

or the entire spreader roller 1. The individual roller sections 4 are only slightly different from one another Distance that is determined by the width of the support bearing 6. This creates an even mark-free Support of the paper web 14 on the spreader roller 1 guaranteed. The axes are 5 in the area of the support bearing 6 designed so that in each case a coupling part 11 with the coupling part the adjacent axis is in a form-fitting connection. The support bearing 6 is to accommodate the Coupling parts 11 are provided with corresponding recesses 12.

The mode of operation of the spreader roller is now as follows: Starting from a not shown, Paper roll processing machine, such as rewinding machines or slitting machines, in the Spreader rollers are required via a tie rod combination 13, which is attached to the traverse 3 engages, the spreader roller 1 is pivoted towards the paper web 14. This is done initially a general smoothing of the paper web, as it is known from the previous spreader rolls. At the

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1 sheet of drawings

Claims (2)

Patent claims: 1, spreader roller for running material webs " made of paper or the like, which consists of a large number of individual freely rotatable roller sections, wherein between the sections consisting of individual rollers optionally and independently adjustable, the degree of curvature determining support bearings are provided, thereby characterized in that each freely rotatable roller (4) on a substantially length the roller corresponding axis (5) is mounted, the support bearing (6) in the contact area of two adjacent axles that carry the rollers (4) and are positively interconnected (5) are arranged. 2. Spreader roller according to claim 1, characterized in that the support bearings (6) consist of two parts (6 'and 6 "), the parting line running transversely to the center of the axis and this intersecting.