EP0663978B1 - Concrete-distribution rig - Google Patents

Abstract

PCT No. PCT/EP93/02503 Sec. 371 Date Nov. 14, 1994 Sec. 102(e) Date Nov. 14, 1994 PCT Filed Sep. 16, 1993 PCT Pub. No. WO94/08111 PCT Pub. Date Apr. 14, 1994.The invention concerns a five-arm concrete-distribution rig (20) mounted on a vehicle. Arms (1, 2 and 3) can be folded together by pivoting in opposite directions about hinged joints (B and C), which are capable of pivoting through approximately 180 DEG , to form a "Z". In order to make it possible to supply concrete through several hoses in parallel, to upper stories and over obstacles, the invention proposes that arms (3, 4 and 5) can be folded together by pivoting in the same direction about joints (D and E), which are capable of pivoting through approximately 270 DEG , to bring them up against arms (2 and 3) in the vicinity of hinged joint (C).

Description

The invention relates to a five-armed concrete placing boom arranged on a vehicle with a first mast arm 1 arranged on a front axle on the vehicle and rotatable about a vertical axis on a horizontal swivel joint A, with articulated joints B, C, D, E in pairs against each other the previous mast arm can be folded in a substantially parallel orientation, further second, third, fourth and fifth mast arms 2, 3, 4 and 5 lying in the driving position under the first mast arm 1, and with tubular rotating couplings that extend along the individual mast arms and are parallel to the articulated joints interconnected pipe sections of a concrete to which a delivery pipe leading to the free end of the fifth mast arm 5 is connected to a pipe rotating coupling, the first and second mast arm 1, 2 and the second and third mast arm 2, 3 having a swivel range of approximately Knickge with 180 ° steer B and C in opposite directions in the manner of a Z-fold.

A concrete placing boom of this type is known (DE-PS 34 46 290), in which all boom arms 1, 2, 3, 4 and 5 can be folded against one another at their articulated joints B, C, D and E in the manner of a multi-Z folding. This concrete placing boom has a long reach and can be used to advantage in low construction sites as well as in building construction. The Multi-Z folding also ensures a quick operational readiness after only a short lifting of the partially unfolded Arm packs and a high degree of flexibility, especially when concreting hard-to-reach places, whereby dead spaces are largely avoided both when lifting the vehicle close to the vehicle and when concreting in low rooms. In order to achieve a mass distribution that is favorable for the load and moment absorption to be absorbed by the chassis, the articulated joints C and E near the front axle have a swivel range of 270 ° between arms 2 and 3 or 4 and 5, while the other articulated joints B and D have a swivel angle of 180 °. Concreting parallel to the working level is possible with the Multi-Z folding. However, bringing the end hose up to the driver's cab must be bought with a relatively high unfolding height.

Furthermore, it is known per se in concrete placing booms with four mast arms to fold the mast arms 1, 2 and 3 against one another at their articulated joints B and C in the manner of a Z-fold and to fold the mast arm 4 at the joint D in the same direction as the mast arms 2 and 3. This type of folding is specially designed for concreting in low rooms, since the end hose can be moved along a specified horizontal working line over the entire working area from the driver's cab to the maximum radius with a low unfolding height. However, this four-arm placing boom cannot be used, or can only be used to a limited extent, when concreting with obstacles or from the ground on higher floors with parallel hose routing should.

The invention is therefore based on the object to develop a concrete placing boom of the type mentioned, which can be used both in ground-level, lower rooms while overcoming obstacles and in higher floors for concreting with parallel hose routing and the lowest possible unfolding height.

To achieve this object, it is proposed according to the invention that the third and fourth mast arm and the fourth and fifth mast arm at their articulated joints D and E are each foldable in the same direction as the second and third mast arms 2 and 3 in the region of their articulated joint C in the manner of a roll fold .

With these measures it is achieved that the mast arm 2, in addition to a guiding function for ground-level concreting, also has an outreach function that allows obstacles to be overcome in the ground-level area and over several floors, while the subsequent mast arms 3, 4 and 5 alone (without the arm 2) enable a parallel hose guide with a low unfolding height from its extended position to the obstacle to be overcome. Further possible uses are made possible in that the articulated joint D and / or the articulated joint E has a swivel angle of approximately 270 °.

In order to reduce the lateral outreach of the mast and thus to improve its slip properties when inserted into narrow openings, it is proposed according to a further advantageous embodiment of the invention that all pipe sections and the associated pipe swivel couplings are arranged on the same side of the mast arm. This also ensures that elaborate rotary unions of the rotary pipe couplings through the articulated joints are eliminated.

Fig. 1

eine Seitenansicht einer Autobetonpumpe mit fünfarmigem Betonverteilermast im zusammengefalteten Fahrzustand;

Fig. 2a und b

die Autobetonpumpe nach Fig. 1 beim Einfahren und beim ebenerdigen Betonieren in einer Fabrikhalle;

Fig. 3

die Autobetonpumpe nach Fig. 1 beim Betonieren in mehrstöckigen Gebäuden und beim Überwinden von Hindernissen;

Fig. 4a bis c

die Betonpumpe nach Fig. 1 mit auf dem Betonverteilermast aufgesetztem Endschlauchmanipulator zum Befüllen von Tunnelschalungen in einer Seitenansicht, einer Stirnseitenansicht und einer vergrößerten Seitenansicht des Endschlauchmanipulators.

The invention is explained in more detail below with reference to the drawing. Show it

Fig. 1

a side view of a truck-mounted concrete pump with five-arm concrete placing boom in the folded driving state;

2a and b

the truck-mounted concrete pump of Figure 1 when entering and concreting at ground level in a factory hall.

Fig. 3

the truck-mounted concrete pump of Figure 1 when concreting in multi-storey buildings and when overcoming obstacles.

4a to c

the concrete pump of FIG. 1 with the end hose manipulator placed on the concrete placing boom for filling tunnel formwork in a side view, an end view and an enlarged side view of the end hose manipulator.

The truck-mounted concrete pump shown in the drawing has a chassis 10, a pivot bracket 16 arranged in the vicinity of the front axle 12 and the driver's cab 14 of the chassis 10, a distributor mast 20 rotatable on the pivot bracket 16 about a vertical axis 18 through 360 °, and a material feed container 22 concrete, hydraulically driven concrete pump 24 and a delivery line 28 connected to the concrete pump 24 via a pipe switch 26. The placing boom 20 has five boom arms 1, 2, 3, 4 and 5 which are connected to the pivot joint A with the pivot bracket 16 and the articulated joints B, C, D and E are connected to each other. The folding in and out of the mast arms 1 to 5 around the joints A to E is carried out hydraulically by means of double-acting hydraulic cylinders 30, which are articulated with their free cylinder-side and rod-side ends to arms or folding brackets of the mast arms 1 to 5 and the pivot bracket 16. The swivel joint A has a swivel range of 90 ° to 100 °, the articulated joints B and C of approximately 180 ° and the articulated joints D and E of approximately 270 °. In the driving position shown in FIG. 1, the mast arms are folded against one another in an essentially parallel orientation, the mast arms 2, 3, 4 and 5 coming to rest under the base arm 1. The mast arms 1, 2 and 3 are folded in opposite directions at their articulated joints B and C in the manner of a Z-fold, while the mast arms 3, 4 and 5 at their articulated joints D and E are each in the same direction as the mast arms 2 and 3 are folded against each other like a roll fold.

2a and b illustrate the mode of operation when concreting the floor at ground level in low rooms, in particular in a factory building 32. For this purpose, the mast arms 2 to 5 are first pivoted with the base arm 1 slightly raised in the downward position by turning the pivot bracket 16 in front of the driver's cab 14 and lowered to an inclined position so that passage through the lower entrance gate 34 of the factory hall 32 is possible (FIG 2a left). The arm assembly 2 to 5 can be set up inside the factory hall 32 and concrete can be applied while filling the delivery line (FIG. 2a on the right). After unfolding the concrete placing boom 20, the concreting of the floor is started at the point furthest away from the vehicle, namely via the flexible end hose 36 hanging down at the free end of the mast arm 5, which is directed by the operator to the locations to be concreted. By means of a suitable movement of the mast arms 1 to 5 in their joints A to E, the end hose can be moved along a working line L parallel to the floor up to directly in front of the driver's cab 14. Due to the special arrangement and swivel ranges of the articulated joints B to E, the unfolding height H is only slightly higher than the working line L traversed by the free end of the end arm 5. Only a few simpler are then required from the end position of the end hose 36 near the driver's cab shown in FIG. 2b Sequences of movements in order to bring the mast arms 2 to 5 into their folded position shown on the right in FIG. 2a.

The peculiarities of the five-armed concrete placing boom described above result above all from the movement analysis according to FIG. 3. When concreting at ground level, the arm 2 together with the arm 1 can be used to overcome obstacles 38, for example partition walls, hall installations and the like, while the Arms 3 to 5 (without arm 2) can be used between their extended position and the obstacle 38 for parallel hose routing. The same applies to concreting in higher floors, in which the arm 2 together with the arm 1 is required to bridge the distance in the vertical direction. With conventional concrete placing booms, these concrete tasks, which are common in practice, cannot be solved.

As can be seen from FIGS. 4a to c, the truck-mounted concrete pump described can also be used for tunnel concreting if the end arm 5 is additionally equipped with a hydraulically and / or motor-operated end hose manipulator 40. The end hose manipulator 40 can be connected to the last pipe section 46 of the end arm 5 of the concrete placing boom 20 via a rigid pipe section 42 and a pipe rotating coupling 44. The pipe section 42 has at its front end a support structure 58 on which a pipe section 42 in substantially axially parallel hydraulic cylinder 48 is pivotally mounted. At the front end of the pipe section 42, the flexible end hose 36 is connected, which carries in its end third a sleeve 50 designed as a clamping bracket, which is provided with lateral pivot bearings 52 to which the fork-shaped load arm 54 of a two-armed pivot lever 56 is articulated. The pivot lever 56 is pivotally mounted at the end of an essentially axially via the support structure 58 of the pipe section 42 about an axis 60 parallel to the pivot bearings 52 and is connected to the piston rod 64 of the hydraulic cylinder 48 at its power arm 62 which is angled with respect to the load arm 54. By actuating the hydraulic cylinder 48, the pivot lever 56 can be pivoted in an angular range of approximately 60 °. This pivoting movement is converted into a bend in the end hose 36, the connecting piece projecting beyond the sleeve 50 passing through an effective pivoting angle of 90 °. Furthermore, a housing 66 is arranged on the pipe section 46 for receiving a hydraulic motor 68, the drive shaft 70 of which can be coupled to the pipe section 42 via a chain drive 72. Thus, the pipe section 42 can be rotated by motor in relation to the pipe section 46 in any rotational position. The rotation and tilting movement of the end hose 46 takes place by hydraulic control of the hydraulic motor 68 and the hydraulic cylinder 48 via the control valves 74 arranged in the housing 66 with the aid of a remote control (not shown). The end hose 36 can thus be actuated by corresponding actuation of the distribution mast 20 and the end hose manipulator 40 are successively connected to the concreting nozzle or window 76 of a tunnel formwork 78.

In summary, the following can be stated: The invention relates to a five-armed concrete placing boom 20 arranged on a vehicle, the mast arms 1, 2 and 3 of which, at their articulated joints B and C having a pivoting range of approximately 180 °, can be folded in opposite directions in the manner of a Z-fold. In order to enable concreting under parallel hose routing over obstacles and floors, it is proposed according to the invention that the mast arms 3, 4 and 5 on their joints D and E, which have a swivel range of approximately 270 °, each have the same direction as the mast arms 2 and 3 in Area of their articulation C are foldable against each other in the manner of a roll fold.

Claims (4)

1. A five-arm concrete-distribution rig (20) arranged on a vehicle comprising a rig arm (1) higed to a horizontal pivot joint (A) on a pivot bearing block (16) which is arranged on the front axle side on the vehicle (10) and rotatable about the vertical axis (18), second, third, fourth and fifth rig arms (2, 3, 4, 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, a plurality of pipe sections (46) of a feed pipe (28), wherein the feed pipe can be loaded with concrete and leads to an end hose (36) hinged to the free end of the fifth rig arm (5) at a pipe rotating joint (44) and wherein the pipe sections extend along the rig arms and are connected with one another at pipe rotating joints which are axially parallel with respect to the hinged joints, and wherein the first and second rig arms (1, 2) and the second and third rig arms (2, 3) are foldable like a Z against one another in opposite rotational directions at their hinged joints (B, C) having a swivelling range of approximately 180°, characterized in that the third and fourth rig arms (3, 4) and the fourth and fifth rig arms (4, 5) can be roll-folded against one another at their hinged joints (D, E) each in the same rotational direction with the rig arms roll-folded between the second and third rig arms (2, 3) in the area of its hinged joint (C).
2. The concrete-distribution rig according to Claim 1, characterized in that the hinged joints (D, E) between the third and fourth rig arm (3, 4) and between the fourth and fifth rig arm (4, 5) have an angle of traverse of approximately 270°.
3. The concrete-distribution rig according to Claim 1 or 2, characterized in that all pipe sections (46) and the associated pipe rotating joints which are free of rotary leadthroughs are arranged each on the same side of the respective rig arms.
4. The concrete-distribution rig according to one of the Claims 1 to 3, characterized in that an end-hose manipulator (40) is arranged on the free end of the fifth rig arm (5) preferably for the motor-driven movement and alignment of the end hose (36) by a remote control.

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