Crane with boom and running track for a cable carrier

Abstract

A crane with a boom, on which running tracks for cable carriers are disposed, having two running tracks for the cable carriers, which engage into one another with a positive lock. One running track is connected with the crane or the boom, and the other running track is displaceable on the crane or the boom.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Other objects and features of the present invention will become apparent from the following detailed description considered in connection with the accompanying drawings. It is to be understood, however, that the drawings are designed as an illustration only and not as a definition of the limits of the invention.

In the drawings, wherein similar reference characters denote similar elements throughout the several views:

FIG. 1 shows a portal crane with boom according to an embodiment of the invention;

FIG. 2 shows a boom with running track and spring according to an embodiment of the invention;

FIG. 3 shows a cable carrier on a movable running track according to an embodiment of the invention;

FIG. 4 shows a side view of FIG. 3;

FIG. 5 shows advantageous embodiments of running tracks according to the invention;

FIG. 6 shows a hydraulic mechanism having a hydraulic cylinder and piston rod; and

FIG. 7 shows a boom with a respective follow-up, having an electric spindle drive and a spindle.

Claims

1. A crane having a boom and comprising: two running tracks for cable carriers, said tracks engaging into one another with a positive lock, one of said running tracks being connected with the crane or the boom in a fixed manner, and the other of said running tracks being displaceable on the crane or the boom.

2. The crane according to claim 1, wherein the fixed running track is disposed on the crane and the movable running track is disposed on the boom.

3. The crane according to claim 1, wherein the displaceable running track is suspended by way of a tongue-and-groove connection, which carries a weight force of the running track and the cable carriers that run on it.

4. A crane according to claim 2, further comprising springs disposed between the displaceable running track and the boom.

5. A crane according to claim 4, wherein the spring is helical, steel, plastic or rubber.

6. A crane according to claim 1, wherein a hydraulic mechanism is disposed between the movable running track and the boom.

7. A crane according to claim 1, wherein a mechanical tracking device is disposed between the movable running track and the boom.

8. A crane according to claim 1, wherein ends of the running tracks that engage into one another are in a shape selected from the group consisting of semi-circle, S-shaped, pointed, wave-shaped, slanted, and straight.