DE1861663U - TOWER CRANE WITH ELEVATING MAST. - Google Patents

Description

Dipl.-Ing. W. Weinkauff RA. 566 202 * ~ 1. 9.62

PATENT ADVOCATE

Frankfurt / Main
Georg-Speyer-Sir. 1

lirma Hilgers A. G-, Sheinbrohl

Tower crane with a straight mast.

The innovation is based on a vertical one that can be called up by means of a winch and Piaschenzug Working position tiltable and foldable mast, in particular one, which can be guided in the tilting area by means of a spindle drive ! Tower cranes s.

Around the mast to facilitate road transport To be able to fold down as low as possible, its center of gravity lies in the folded-up state, in the pivoting direction seen, behind its pivot point, so that there is a tilt angle in the pivoting path of the mast If this is exceeded, the mast will fall against the vertical position due to its own weight and be damaged in the process would, if not in this last part of its pivoting path, the block and tackle through the spindle drive would be replaced, which allows a sensitive and complete raising and locking of the mast

With the known masts of this type, the crane operator has to open the winch after crossing the catchment area

the spindle, but come to a standstill before the tilting angle is exceeded, this is difficult work, especially with large tower cranes. If the winch runs too far, the mast will be knocked over or damaged by its own weight and the force of the rope. If the winch does not run far enough, further erection with the spindle drive is impossible. The crane operator must therefore drive the winch slowly and carefully, which means that time is lost.

The innovation avoids these deficiencies in a surprisingly simple manner by arranging a winch in the tilting range of the mast stopping stop, in particular a limit switch. The mast can now with the highest possible speed can be brought up safely by the winch, because its drive in right moment is automatically and inevitably shut down, so that dangerous operating errors are excluded are. The mast is then sensitized by hand in a known manner with the spindle drive down to the vertical operating position driven and locked.

If the winch in a known manner after erecting the mast and after releasing the boom lock is also used to swivel up the boom, the innovation with the boom lock can be developed in a further development one wired in parallel to the limit switch

.P * (* Id 1 Y) Y) £ ■ * ~ \ ~ f "

Switch vea? Ge # e & eft with the release of the boom lock releases the winch motor again at the right moment for boom pitching.

The innovation should be illustrated using the exemplary embodiment shown schematically in the figures.

Show it:

Figure 1 shows a (tower crane in side view, immediately after the coupling of the Spindle drive and before exceeding the tilt angle; in addition, the vertical operating position is shown in dashed lines of the tower,

Figure 2 in an enlarged side view

Spindle drive and the installation of the end switch.

The foot of the mast 1 is hinged at point Y on the superstructure 2, and to erect the mast up to the The position shown in solid lines in FIG. 1, shortly before reaching the tilt angle, is also used by the winch 3 the pulley 4, in which the adjusting rope 5 for the boom 6 is reeved, which during the Straightening still in the fermentation position by that Lock 7 is held.

If the öüurm is pulled out when erecting the one in Figure 1 and has reached the position shown enlarged in FIG. 2, the lower end of the mast releases the switching ruler 8 of the Fixed limit switch 9 on the superstructure in the tilting area of the mast, whereby the winch 3 is stopped so that the crane operator is forced to move the mast into to bring the mast mounting 11 into the vertical operating position by overcoming the tipping point.

Also, the boom adjustment is a lack of service impossible, because "before the winch 3 for Aulegerverstellung can be started again, the crane operator must by releasing the boom lock 7 opposite the mast 1 is coupled with this lock, not shown, parallel to the limit switch 9 Close the wired switch so that the erected mast is protected against stress caused by the rope forces of the restarting wind turbine is inevitably protected.

Claims (2)

-1.9.62, claims for protection 1.) Erectable by means of a winch and pulley, tiltable and into its vertical working position iCLappmast, especially a tower crane, which can be guided in the tipping area by means of a spindle drive by arranging a stop in the tilting area of the winch (3) shutting down Mast (1), in particular a limit switch (9) 2.) Tower crane according to claim 1, in the pulley To erect the mast, also use the adjusting rope for the lockable on the mast in the transport position Boom is reeved, characterized by a coupled with the boom lock (7) when Release the switch that closes the lock and is wired in parallel to the end switch (9).