| 摘要 |
A framework for a press in a paper or board machine includes two interconnected side frames, each having two columns. Each column (13) in the side frame on the operational side of the machine has a removable section (25) for permitting the exchange of an endless press felt or other belt passing through the press nip. All four columns are axially prestressed with a force exceeding by a safety margin a tensile force induced in the respective column during operation of the press. The columns preferably are box beams and they are prestressed by beams of hydraulic nuts (37), for example, acting on tension elements, preferalby rods (27), extending axially inside the box beams. The tension rods (27) in the two columns (13) that have a removable column section (27) are two-part rods, the two parts (28, 29) being interconnected by a quick connect/disconnect coupling (30) located proximate to the removable section (25). After disengagement of the coupling (30), one (29) of the two parts can be moved away from the other (28) to permit removal of the removable section (25).
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