| 摘要 |
<p>In an apparatus (2) for use in renovating tube systems, in particular sewer tubes of circular cross-section, and comprising a frame (4) on wheels (6), which frame is arranged to be moved inside a tube in such a way that the position of the apparatus in the tube is known, and a motor-driven tool (30) which is arranged for cutting away items protruding into the tube and/or for forming side openings in the tube wall or in a tube lining, the motor driven tool (30) is mounted on a carrier arm (28) protruding beyond an end part of a portion (14) of the apparatus which portion is journaled so as to be rotatable in relation to said frame (4) around a longitudinal axis, the carrier arm being pivotably connected, opposite of the tool, to the said portion (14) at a distance from the said end part thereof, and between the said end part of the rotatable portion (14) and the pivot axis (26) of the carrier arm an inflatable lifting member (32) is arranged inside the said rotatable portion (14), interposed between the rotatable portion (14) and the carrier arm (28) in such a way that the tool (30) on the latter can be moved diametrically within the tube, and a turning motor (20) is interposed between the frame (4) and the rotatable portion (14).</p> |
