| 摘要 |
A screening apparatus (1) for screening particulate material and comprising: a base frame (11); an elevating conveyor (12); a conveyor carrying frame (13) adjustably mounted on the base frame (11) and arranged so as to be capable of moving the conveyor (12) generally lengthwise in order to adjust the position of an upper end (16) of the end (16) of the conveyor; a sub-frame (18) pivotally adjustably mounted on the base frame (11) via a pivot (20) and carrying a vibratory screen (17) arranged to receive material falling under gravity from the upper discharge end (16) of the conveyor (12), said sub-frame being adjustable about said pivot in order to adjust the attitude of the screen; discharge means (23) for discharging separate screened portions of the material; and a linkage (19, 22) between the sub-frame (18) and the carrying frame (13) which includes a direct pivotal connection (20) between the sub-frame and the carrying frame whereby there is simultaneous lengthwise adjustment of the sub-frame; in which the elevating conveyor (12) and the conveyor carrying frame (13) comprise a main portion (12a, 13a) extending from a loading station (14), and an upper end portion (12b, 13b) which includes the discharge end (16) of the conveyor, said portions being hingedly connected together to allow the apparatus to be converted between an operative mode in which the end portion forms a prolongation of the main portion, and a transport mode in which the end is pivoted downwardly relative to the main portion thereby to reduce the transport height of the discharge end of the conveyor.
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