Dust tight closed type belt conveyor

A dust tight closed type belt conveyor for conveying dust contained materials to be scattered out during operation:

• which comprises;
• 1) an endless conveyor belt to be driven for receiving and conveying the materials, being laid out from an upstream side provided with a transfer section to a downstream side,
• 2) a supporting frame for supporting the conveyor belt from the backside thereof comprising a plurality of rollers arranged at regular intervals in a driving direction for supporting a main backside part of the conveyor belt and a plurality of glide plates arranged between the rollers in the driving direction for supporting both edges of the conveyor belt from the backside thereof in a manner that the conveyor belt is supported in a concave form,
• 3) a cover roof extending in the driving direction for dust tightly closing an upside space of the conveyor belt extending in the driving direction comprising a top plate pitched so as to spread from one of the glide plates through the upside space to the other of the glide plates,
• whereby the conveyor belt is supported in a form of concave by a plurality of rollers, a plurality of the glide plates contacted by the both edges of the conveyor belt and the cover roof closing the upside space over the convey or belt all make a dust tight and closed conveying space extending in the driving direction;
• wherein the cover roof comprises a first top plate fixed to the conveyor frame of the transfer section so as to cover a space between the conveyor frame of the transfer section and a skirt plate of the chute;
• and
• the cover roof comprises a second top plate fixed to the conveyer frame on the downstream side of the transfer section so as to cover the upper portion of the carrier belt, and the first top plate overlaps with the lower portion of a start portion of the second top plate.