PURPOSE: To take a countermeasure for spouting of an excavated ground even though it is of a type with debris and provide possibility of transporting muck in favorable performance. ;CONSTITUTION: A tube 21 having resilience is installed on a dolly 17 in such an arrangement that a muck intake 21a and exhaust port 21b are supported by a front open plate 19 and a rear open plate 20. On both sides 21c, 21d of an elastic tube 21 upon the dolly 17, the first and the second rotor 114, 124 (or 134, 144, or 154, 164) are opposingly installed in such a way as rotatable round the first and the second drive shaft axis CT1, CT2 (or CT3, CT4, or CT5, CT6). On the first and second rotors, the first and the second tube pressing roller 115A-C, 125A-C (or 135A-C, 145A-C, or 155A-C, 165A-C) are furnished in such a way that they can revolve from the debris intake side to the exhaust port 21b side while pinching by pressure the elastic tube 21 through the rotational motions of the first and second rotors.;COPYRIGHT: (C)1994,JPO
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