Transport device of the pieces, particularly designed to allow the rapid transfer of pieces through an opening which is capable of closing, fluid-tight provided between the opposed faces of a wall, and thus, the loading or unloading of chambers capable of closing, fluid-tight. In a preferred embodiment, it includes an accumulator is not advance - to - not 42 comprising a first frame which comprises a rack 102 having a series of points of support of the door - substrates, and a second similar frame bearing a rack 122 and moved by an eccentric so that each door - substrate supports for the first rack is extracted, moves towards the front and at the location adjacent deposit. The cell 42 is movable between a first position in which said opening 22 can be closed hermetically and a second position in which the pieces may be transferred between the accumulator and a receiver 11 through the opening. Then, the receiver is a rotating drum within a chamber of treatment.
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