PURPOSE: To increase the drying effect for fowl droppings even with a long line of cages. ;CONSTITUTION: A rigid reciprocating lever 14 is halved to two reciprocating levers at the substantially center of the length of a fan air passage. There is provided reciprocating motion driving means of the halved rigid reciprocating lever 14 intermediately between the two reciprocating levers. The driving means includes two discs 20, 20' parallely disposed longitudinally of the fan air passage such that they are displaced at their centers and partially overlapped. Opposing two ends 19, 19' of the halved rigid reciprocating lever 14 are mechanically connected with opposite peripheral edges of the two discs 20, 20'. Thus, pulling force and pressing force are alternately provided to both reciprocating levers 14 for reciprocal motion thereof by rendering to the two discs 20, 20' same speed circular motion around a central axis 21 of a hypothetical circle circumscribed about the two discs 20, 20' without rotation of their selves.;COPYRIGHT: (C)1996,JPO
展开▼
