Arrangement for controlling the rolling of a cylindrical object

Abstract

Apparatus for controlling rolling motion of a cylindrical object includes a fixed plane formed with guides that are spaced apart along a direction of rolling motion of the cylindrical object and provide a path from an upper surface of the plane to the underside of the plane. An elongate pressure element has a medial segment located on the upper surface of the fixed plane and has first and second ends that are guided to the underside of the plane via the first and second guides respectively. A control device has first and second connections and is operable selectively for providing a pressure medium under pressure discharging the pressure medium to a lower pressure. One of the first and second connections of the control device is connected to the first end of the elongate pressure element and the other of the first and second connections is connected to the second end of the elongate pressure element, for selectively filling the pressure element with a pressure medium through at least one of the first and second ends and for draining the pressure medium from the pressure element through at least one of the first and second ends.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] This application claims priority under 35 USC 119 of Finnish Patent Application No. 20050337 filed Mar. 31, 2005. BACKGROUND OF THE INVENTION [0002] 1. Field of Technology [0003] This invention relates to controlling the rolling of a cylindrical object such as a reel of paper. [0004] 2. Prior Art [0005] Lots of cylindrical objects are moved at paper mills, print shops and metal rolling mills, for example. Different types of conveyors and cranes have been developed for the movement of cylindrical objects. Rolling is a known method. [0006] When a cylindrical object is being rolled, its movement is controlled by different types of pushers and receivers. It is also known that a cylindrical object is rolled on a slightly inclined floor plane. However, it is difficult to roll large and heavy cylindrical objects, because rolling a heavy mass requires force. The pushers and receivers must be dimensioned to be strong, which makes them heavy and r...

AI Technical Summary

Benefits of technology

[0014] The arrangement according to the invention provides for very good control of the rolling movement of a cylindrical object. Furthermore, the structure of the arrangement according to the invention is light compared to prior art solutions, as the state of motion of the cylindrical object can be controlled using force imposed on the object by a pressure element filled with a pressure medium, eliminating the need for other structures (such as pushers or stoppers).

Problems solved by technology

However, it is difficult to roll large and heavy cylindrical objects, because rolling a heavy mass requires force.

The pushers and receivers must be dimensioned to be strong, which makes them heavy and relatively large.

Reels of paper in particular are sensitive to damage caused by rolling.

It is difficult to control the speed of the reel during rolling, and the speed may become higher than intended.

This will easily make the reel bounce against the stopper and can cause mechanical damage on the surface of the paper reel.

It is thus clear that stopping a heavy cylindrical object will also require a lot of force and a strong receiver.

This solution is relatively heavy, and controlling the stopping of the reel on the inclined plane requires great accuracy.

Furthermore, as the reel rolls over the inclined plane onto the horizontal plane, mechanical damage may arise on the surface of the reel.

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