| 摘要 |
The shoulders (F, F') of the cleaning device (B, P, T, R1, R2) are hinged to connecting rods (3, 3') rotating on a real or virtual pivot axis (A, A', 33) situated between the cylinders to be cleaned (C1, C2) and parallel to these, the said connecting rods being interconnected by torsion means. At least one of the said shoulders (F') is provided with a rear wheel (8) which runs in a fixed guide (9) situated approximately at the same height as the said pivot axis and approximately perpendicular to it. Means (14, 20, 25, 28) are provided for pivoting the said connecting rods, in such a way that because of the presence of the said guide (9) the cleaning device executes a simultaneous movement of rotation upon itself and about the said pivot axis (A, A', 33), in order to act on one of the cylinders to be cleaned or to park in a position away from these, useful as a position of rest or of maintenance of the apparatus. On at least one of the shoulders of the cleaning device is at least one wheel (22) that can interfere with cams (D) fixed to the side of one of the cylinders to be cleaned if the latter is provided with gripping clamps (Z) or other irregularities of its surface, in order automatically to prevent undesired interference of the cleaning device with critical areas of the said cylinder that is to be cleaned.
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