| 摘要 |
A telescopic rod composed of a plurality of tubular rod sections which are mounted so as to be slidable within each other includes a multistage piston-cylinder unit which is arranged within the telescopic rod and is connected to the outermost rod section of the telescopic rod and to the last inner rod section of the telescopic rod. Locking bars are provided in the areas of the inner end faces of individual sections, wherein the locking bars are displaceable in a direction transversely of the longitudinal direction of the rod sections and wherein the locking bars can be placed in operative engagement with the respectively adjacent outer rod section. When the rod sections of the telescopic rod are in the extended end position, the locking bar of each inner rod section engages in a positively locking manner in an opening of the respectively outer adjacent rod section. Spring-biased clamps are provided on the outer sides of the rod sections located between the outermost rod section and the innermost rod section. When the telescopic rod is pushed together, the clamps grasp in a positively engaging manner bolts arranged at the end faces of the inwardly following rod sections.
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