it is a abferkelbucht (19) with a abferkelk u00e4fig described to a trough (2) receiving kopfrahmen (1) two vertical axes (9) schwenkverstellbar stored seitengitter (3) which, on the kopfrahmen (1) opposite k u00e4figseite a k u00e4figabschlu ss of two l u00e4ngsrohren (15) of the seitengitter (3) adjustable led abschlussgittern (8).in order to create a favorable konstruktionsbedingungen, it is proposed that the abschlussgitter (8) for vertical schwenkachsen (9) schwenkverstellbare wing (10) form.