DE234896C

DE234896C -

Info

Publication number: DE234896C
Application number: DENDAT234896D
Authority: DE

Claims

IMPERIAL

PATENT OFFICE.

For driving thin-walled sink sleeves into the ground for the production of concrete piles it is advisable to use a device which essentially consists of an inner propulsion core and a spreadable, from the inside against the plunger shell pressed coat. To such punch cores for driving in sinkholes with different To make diameters suitable,

ίο are the expanding jaws according to the invention of the jacket with their inner beveled ends on conical bushings that be raised and lowered together by rotating a spindle carrying them.

The radially displaceable expanding jaws are mounted in the inner core so that the The ramming impacts exerted on the propulsion core do not affect their setting. At this Formation of the impact core, the impact effect on the pole tip is not weakened transfer. As a result, very long sinkers can be so deep without difficulty drive in so that the pile has the necessary stability and load-bearing capacity.

An embodiment of the subject matter of the invention is shown in the drawing.
Fig. Ι is a longitudinal section,
Fig. 2 is a cross section.
The device used to drive the thin-walled sheet metal pipe 1 consists of a tubular propellant core 2 with propulsion foot 3 and impact hood 4 riveted together from quadrant iron. By appropriate rotation of the spindle 5, the bushes 6 are raised or lowered. Since the arms 7 of the expanding jaws, which are beveled at their inner end with the opposite slope to the sleeves, are connected to the sleeves 6 by a dovetail-like guide, the expanding jaws, which consist of the continuous casing pieces 9 and the stiffening brackets 8, are removed during the downward movement of the sleeves. spread outwards.

After the sinker has been driven in, the spindle 5 is turned back. Through this the expanding jaws 9 are loosened from the sheet metal tube, and the impact core can be lifted out will.

Pate ν T-A ν SPRU c H:

Device for driving in sinking envelopes by means of a tubular propulsion core and expanding jaws pressed against the plunger casing, characterized in that the spreading jaws (7, 8) with the beveled arms (7) are guided on conical bushings (6) which are rotated a spindle (5) carrying them can be raised or lowered together.

1 sheet of drawings,