Fluid handling – Systems – Articulated or swinging flow conduit
Patent
1994-11-14
1996-07-16
Chambers, A. Michael
Fluid handling
Systems
Articulated or swinging flow conduit
141387, B67D 564
Patent
active
055357806
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to a five-arm concrete-distribution rig arranged on a vehicle comprising a rig arm 1 hinged to a horizontal pivot joint A on a pivot-bearing block which is arranged on the front axle side of the vehicle and rotatable about a vertical axis. The concrete-distribution rig further comprises rig arms 2, 3, 4 and 5 lying in a travelling position under the rig arm 1 and foldable in pairs at the hinged joints B, C, D and E against the respective preceding rig arm in an alignment essentially parallel to one another. The distribution rig also comprises pipe sections of a feed pipe, wherein the feed pipe can be loaded with concrete and leads to an end hose hinged to the free end of the rig arm 5, and wherein the pipe sections extend along the individual rig arms and are connected with one another at pipe rotating joints, which are axially parallel with respect to the hinged joints. The rig arms 1, 2 and 3 can be folded at their hinged joints B and C in opposite rotational directions so as to be against one another like a Z. The hinged joints B and C have a swivelling range of motion of approximately 180.degree..
BACKGROUND OF THE INVENTION
A concrete-distribution rig of this type is known (DE-PS 34 46 290), wherein all rig arms 1, 2, 3, 4 and 5 can be folded against one another at their hinged joints B, C, D and E like a multi-Z-folding. This concrete-distribution rig reaches very far and can be advantageously utilized both in the low-rise building construction and also in the high-rise building construction. The multi-Z-folding further guarantees a quick operational readiness after only a short lifting and partial unfolding of the arm package. The rig also provides a high flexibility, in particular, during the pouring of concrete or the concreting of difficult to access areas whereby dead spaces are essentially avoided during upward feed near the vehicle and also during the pouring of concrete in low spaces. In order to also achieve a mass distribution favorable for the load and moment to be absorbed by the chassis when in the folded travelling position, the hinged joints C and E near the front axle have a swivelling range of 270.degree. between the arms 2 and 3 or 4 and 5, whereas the remaining hinged joints B and D have an angle of traverse of 180.degree.. The pouring of concrete parallel to or along the working plane is possible with the multi-Z-folding. However, to guide the end hose all the way to the cab requires a relatively high unfolding height.
Furthermore, in a concrete-distribution rig with four rig arms, it is actually known to fold the rig arms 1, 2 and 3 against one another at their hinged joints B and C in opposite rotational directions like a Z and to fold the rig arm 4 at the joint D in the same rotational direction with the rig arms 2 and 3 against one another. This type of folding has been specially designed for pouring concrete in low spaces because the end hose can be moved over the entire work area from the cab to the maximum extension with a small unfolding height along a predetermined horizontal operating line. However, this four-arm distribution rig cannot be used to provide parallel hose guiding when concrete is supposed to be poured beyond obstacles or from the ground into higher stories.
SUMMARY OF THE INVENTION
The basic purpose of the invention is therefore to develop a concrete-distribution rig of the above-mentioned type, which can be used both in ground-level low spaces to overcome obstacles and also in higher stories for pouring concrete while guiding a hose parallel with the lowest possible unfolding height.
To attain this purpose it is suggested according to the invention that the rig arms 3, 4 and 5 and the associated pipe sections be roll folded, i.e. be folded against one another at their hinged joints D and E each in the same rotational direction with the rig arms 4 and 5 folded between the rig arms 2 and 3 in the area of the hinged joint C.
With these measures, the rig arm 2 serves both a guiding function during the ground-
REFERENCES:
patent: 3625760 (1986-12-01), Mertens
patent: 3707990 (1973-01-01), Schaible et al.
patent: 4130134 (1978-12-01), Castle
patent: 4457338 (1984-07-01), Moller et al.
patent: 4828033 (1989-05-01), Frison
patent: 4924898 (1990-05-01), Evenson
Alwes Dieter
Schlecht Karl
Chambers A. Michael
Putzmeister-Werk Maschinenfabrik GmbH
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