Patent Application
20060288603
1. Field of the Invention
The invention relates to a web guiding element of a newspaper press having a ceiling with a paper shaft extending between a reel changer region below the ceiling and a printing unit region above the ceiling.
2. Description of the Related Art
Web guiding elements serve to guide the paper webs which are to be printed from the reel changer region, what is known as the reel stack, via a paper shaft into the printing unit region. When setting up or maintaining the newspaper press, the web guiding elements have previously usually been mounted by hand. Here, first of all holding apparatuses are fastened to the underside of the ceiling construction which separates the reel changer region from the printing unit region. After mounting of the holding elements, the individual guide rolls are fastened to the holding elements.
As the space on offer in the reel changer region is limited, it is not possible to use auxiliary apparatuses such as cranes or lifting gear during the mounting of the guide rolls. In association with the relatively high weight of the guide rolls, which weight can quite possibly lie in the region of as much as approximately 80 kilograms depending on the size of the printing press, mounting of the guide rolls can therefore only be carried out by a plurality of auxiliary personnel.
Furthermore, the guide rolls have to be aligned in the holding apparatuses, in order that a satisfactory printed image can be achieved by correct guiding of the paper web during the later printing process.
Proceeding from this, the present invention is based on the problem of reducing the mounting expenditure for web guiding elements and at the same time reducing the adjusting expenditure for the guide rolls.
According to the invention, the web guiding element has at least one guide roll which is pre-mounted in a frame or in a housing. This assembly is inserted as an entire unit into the paper shaft and is fastened to the web guiding wall by way of holding apparatuses.
The configuration of the guide roll as an assembly with the frame or the housing makes it possible to insert the web guiding element from the printing unit region downwards into the reel changer region, the use of lifting gear such as ceiling cranes being possible as a result. Moreover, the previous mounting of the guide rolls on the previous holding apparatuses is dispensed with as a result of the pre-mounted construction.
The alignment expenditure overall of the guide rolls is reduced or even avoided by fastening the assembly to the web guiding wall which is oriented in the three coordinate directions x, y and z within the arrangement of the newspaper press. If the frame or the housing is manufactured with low manufacturing tolerances, a further guide-roll alignment process is unnecessary as a rule, as the guide roll has already been aligned by being fastened to the web guiding wall.
The length dimension and the width dimension of the assembly can be smaller than or equal to the length dimension and the width dimension of the paper shaft, with the result that the insertion of the assembly into the paper shaft is made easier.
According to one advantageous development of the invention, the height dimension of the assembly, that is to say from the printing unit region in the direction of the reel changer region, is preferably greater than or equal to the paper-shaft height. Depending on the height of the assembly, the distance of the guide rolls from the underside of the ceiling construction can be set and the angle of attack of the paper web can therefore be varied. If the angle of attack of the paper web is perpendicular or almost perpendicular with respect to the ceiling construction, it is also conceivable for the height dimension of the assembly to be configured so as to be smaller than the paper-shaft height.
It is advantageous if, for sound insulation, at least one sound insulation element is arranged between the printing unit region and the reel changer region. This sound insulation between the reel changer region and the printing unit region is stipulated partly in a country-specific manner. The sound insulation element can then be mounted on the assembly of the web guiding element, as a result of which mounting the sound insulation element in the paper-shaft region can be dispensed with, which has previously been rather complicated.
Furthermore, it is favorable to use the sound insulation element as one or more frame walls or housing walls of the assembly. Here, the sound insulation element can be configured as a holding element of the at least one guide roll and absorb at least part of the weight of the at least one guide roll. In one particular embodiment of the invention, the frame or the housing is formed exclusively from sound insulation elements.
In order to make it possible to fasten the frame or the housing to the web guiding wall in a particular and simple manner with an accurate fit, it is proposed to configure the holding apparatuses as pin elements, preferably locating pins, and/or holes which can be connected to complementary holes and/or pin elements on or in the web guiding wall. In addition to the pin connections, the frame or the housing can have a screw connection or a similar form-fitting or force-transmitting connection between the frame and the housing and the web guiding wall.
A further advantageous embodiment of the web guiding element provides for at least one further holding apparatus to be arranged on the frame or on the housing of the web guiding element and on the underside of the ceiling construction in the reel changer region. An oscillating of the frame or of the housing is avoided by this additional fastening of the frame or the housing, or transmission of oscillations from the printing unit region into the reel changer region or vice versa is reduced. An angular element or a U-shaped rail is suitable, for example, as holding apparatus, one limb being fastened to the frame or to the housing and the other limb being fastened to the paper shaft or to the ceiling construction.
Furthermore, it is of advantage if adjusting elements are arranged on the frame or on the housing, it being possible to change the alignment of the guide roll by way of these adjusting elements. In principle, the correct positioning of the guide rolls has already been performed by the attachment of the frame or the housing to the aligned web guiding wall. However, fine adjustment of the guide roll can be performed by way of the adjusting elements, in order to compensate for tolerances of the frame or the housing in this way.
Depending on the embodiment of the web guiding element, two or more guide rolls can be arranged with these axes offset with respect to one another or in a line.
Other objects and features of the present invention will become apparent from the following detailed description considered in conjunction with the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention, for which reference should be made to the appended claims. It should be further understood that the drawings are not necessarily drawn to scale and that, unless otherwise indicated, they are merely intended to conceptually illustrate the structures and procedures described herein.
a shows a detailed view of the circled region from
One or more paper webs 8 are to be conveyed with the web guiding element from the reel changer region 2 via the paper shaft 4 into the printing unit region 1 to the printing units. In this embodiment, the web guiding element comprises a holding apparatus 7 which has fastened to it the two guide rolls 6 here. During construction of the newspaper press, first of all the holding apparatus 7 is fastened to the underside of the ceiling construction 3, and afterwards the guide rolls 6 are mounted on the holding apparatus 7 and aligned. Depending on the size of the newspaper press, the guide rolls 6 can have a weight of approximately 80 kg, for which reason a plurality of people are necessary for the mounting of the guide rolls 6. The arrow 13 indicates the installation direction of the guide rolls 6 during the assembly of the newspaper press. It is an aim of the invention to reduce the mounting expenditure of the web guiding elements and at the same time to reduce the adjusting expenditure for the guide rolls, possible embodiments of a web guiding element being shown in
a shows an enlarged view of the region which is circled in
The web guiding element according to the invention can therefore be inserted from the printing unit region through the paper shaft into the reel changer region, that is to say in the direction in which gravity acts. An insertion in the opposite direction is also possible. As the available space in the printing unit region is not as restricted as in the reel changer region, it is then possible to use auxiliary apparatuses. As a result, the expenditure on personnel during mounting and the manual work with respect to the heavy web guiding elements can be reduced.
The expenditure for aligning the guide rolls can be minimized or avoided by fastening the web guiding elements to the web guiding walls which have already been aligned.
Thus, while there have shown and described and pointed out fundamental novel features of the invention as applied to a preferred embodiment thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2005 025 776.3 | Jun 2005 | DE | national |
