EP0037571B1 - Distributing mast for a concrete pump - Google Patents

Distributing mast for a concrete pump Download PDF

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Publication number
EP0037571B1
EP0037571B1 EP81102562A EP81102562A EP0037571B1 EP 0037571 B1 EP0037571 B1 EP 0037571B1 EP 81102562 A EP81102562 A EP 81102562A EP 81102562 A EP81102562 A EP 81102562A EP 0037571 B1 EP0037571 B1 EP 0037571B1
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EP
European Patent Office
Prior art keywords
booms
boom
conveying conduit
concrete conveying
mast according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81102562A
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German (de)
French (fr)
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EP0037571A3 (en
EP0037571A2 (en
Inventor
Franz Fenzl
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Friedrich Wilhelm Schwing GmbH
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Friedrich Wilhelm Schwing GmbH
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Publication date
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Priority to AT81102562T priority Critical patent/ATE20373T1/en
Publication of EP0037571A2 publication Critical patent/EP0037571A2/en
Publication of EP0037571A3 publication Critical patent/EP0037571A3/en
Application granted granted Critical
Publication of EP0037571B1 publication Critical patent/EP0037571B1/en
Expired legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck

Definitions

  • the invention relates to a foldable, transportable placing boom rotatable about a vertical axis, which carries a concrete delivery pipe and which consists of a plurality of articulated booms
  • a concrete pump is generally installed in a transport vehicle that also carries a placing boom for the concrete delivery pipe to bring the concrete to the processing site.
  • a placing boom for the concrete delivery pipe to bring the concrete to the processing site.
  • Such a placing boom is known from DE-A-1 923 602.
  • This placing boom consists of a number of articulated brackets which consist of side parts connected with cross braces. In the folded state, the booms are on top of each other, the folding e.g. in the manner of a roll fold or also in the manner of a Z fold is possible.
  • the concrete delivery pipe is laid in such a way that the individual sections of the concrete delivery pipe are connected to the articulated bearings which form the articulated connections of the individual booms.
  • the bearing elements of the articulated bearings are hollow so that the concrete flow is passed through them.
  • Such an arrangement has the disadvantage that the entire bearing must be replaced due to the wear caused by the concrete flow.
  • the known distribution boom despite being folded up, takes up a considerable amount of space, which is also due in particular to the adjustment devices between the individual booms.
  • the larger number of booms requires a larger number of adjustment devices along the erected boom. This increases the risk that these parts will be damaged or that accidents will result from getting caught on formwork or structural parts.
  • the invention proposes that two mutually connected booms are arranged next to one another in the area of the connecting joints and the concrete delivery pipe is guided through the articulated bearings in such a way that two successive booms each have two parallel vertical rotation planes in which the booms are without mutual Disability can rotate.
  • a placing boom for the purpose in question has such a design that it is essentially symmetrical to a vertical central plane
  • the invention proposes a construction in which two mutually connected booms are arranged side by side in the area of the connecting joint.
  • the cantilevers are connected to one another with essential parts. It is clear that almost double the amount of arms can be accommodated on a transport vehicle in this way when folded, since the individual arms are transported on two stacks, so to speak.
  • the invention also solves the problem of collapsing the concrete delivery line in that the concrete delivery line is passed through the hinge bearings. It has been found that the resulting curvatures do not bring any significant disadvantages either structurally or for concrete delivery. However, the considerable advantage is gained that the concrete delivery line can easily be brought into any desired position without difficulties occurring at the points at which the individual pipes move relative to one another.
  • the individual booms and the associated devices can be of largely identical design, which considerably simplifies production.
  • the construction of the single mast is simple in itself.
  • the type of merging does not require any bends in the area of the joints.
  • the connecting joints between two brackets are arranged in the middle plane of the brackets and the adjusting device is arranged on the side of the brackets which is the upper side in a horizontal working position.
  • the invention takes advantage of the fact that expensive bends on the individual arms are unnecessary. If all the adjustment devices are arranged on the top, the risk of getting caught on components with the placing boom or damaging the adjustment devices is also reduced.
  • Another advantage of the design according to the invention results from the fact that the passage of the concrete delivery line through the connecting joints on the one hand requires a corresponding dimensioning of these joints, which in turn are, however, well able to absorb the bending and torsional forces occurring in the construction according to the invention.
  • the invention further proposes that the end piece of the concrete delivery pipe hangs on a pipe bend which is rotatable about a horizontal axis in a rotating coupling and rests in a guide part of a boom in the transport position.
  • the part of the concrete delivery pipe assigned to a boom is arranged in parallel next to the boom. It is easily possible to keep the distances of the concrete delivery pipe from the boom the same for all booms, so that the same connection and fastening means can be used between the concrete delivery pipe and the boom.
  • the design according to the invention can be applied with a Z-fold upwards, but also with a roll fold downwards.
  • the adjustment devices are to be arranged accordingly.
  • the invention further relates to an advantageous embodiment of the fastenings of the concrete delivery pipe on the brackets, which facilitates assembly and disassembly.
  • Elastic inserts in the brackets ensure that no shocks or constraining forces are transmitted to the supporting structure.
  • the pump unit 2 is installed inclined over the drive axles of the chassis 1 in order to obtain the lowest possible filling edge in the feed hopper 3.
  • the discharge line 4 runs, for example, laterally or also via the feed hopper 4 to the placing boom, which consists of the brackets A, B, C and optionally D.
  • the axis of rotation 8 of the placing boom allows twisting, e.g. by 360 °. It is located near the cab.
  • the auxiliary frame 6 of the pump which is part of the support frame 5 of the placing boom, is anchored on the vehicle frame and the extension supports 7 required in the operating position are mounted on the support frame 5 and are pivoted to the chassis for transport.
  • the fixed stand pair 10 connected to the base 5 (see FIG. 3) carries the bearing head with the main bearing 10 of the boom A via a rotating mechanism in the form of a bearing column or a ball slewing ring 11.
  • the placing boom can be rotated about the axis 8 by means of the rotary drive 9.
  • the boom B, C and D which are articulated by means of joints 40 or 41 and 42, can be used in the embodiment according to FIG Figure 1 is only shorter than the boom A. It is clear that a corresponding number of booms is required for a certain range.
  • the basic height ho of the pump unit determined by the overall height of the hydraulic cylinders or the control on the feed hopper side, forms the lower limit for boom parts, while the upper limit is formed by the permissible transport dimension. If two booms are at least partially next to each other in the folded state, then almost twice the number of booms, ie almost twice the reach, can be accommodated at the remaining height according to the invention.
  • the resulting center of gravity S, S1 of the folded placing boom has a strong influence on the choice of the chassis and its wheelbase and vice versa. For example, if the overall center of gravity of the pump with the placing boom is too far to the rear, then the driving and especially maneuvering conditions are adversely affected by front axle relief or chassis with an extended wheelbase are required.
  • Figures 1 and 2 make this center of gravity of the placing boom clear in height and to the axes, for roll folding downwards (Fig. 1) and Z-folding upwards (Fig. 2).
  • the construction of a placing boom according to the invention can be used for any folding method.
  • the boom A rotating by 12, is adjusted by an angle a by hydraulic cylinders 13.
  • This main adjusting cylinder is expediently effective as a pressure cylinder from below.
  • Boom C, C and others are pivoted by ⁇ via hydraulic cylinders 14, 15, angle levers / handlebar combinations 16.
  • brackets If the pivot points of the brackets now lie in the mast axis M, then the brackets at least partially overlap in the side view, as shown in broken lines in FIG. A full overlap of two adjacent brackets is not possible, because the feed pipe led through the mast axis would come to rest on the underside of the neighboring part.
  • the hydraulic cylinders with an angle lever and handlebar are arranged on top of the booms and in one plane between the booms. This arrangement also applies to all other booms, which are not shown. In the operating position, the jacks sit on top of the brackets.
  • Hydraulic cylinders, angle levers and handlebars are only attached to booms A and B at the bottom for Z-folding; all other parts of the movement of boom C and other booms, not shown, are in the unfolded state again at the top. This results in a completely free and accident-proof lower edge of the booms removed from the vehicle.
  • the axis of the concrete delivery line lies with the axis M (X axis) of the associated boom in the same horizontal plane.
  • the horizontal center distance is expediently kept the same for all brackets, so that uniform elements for the holder can be reached.
  • the concrete delivery line 25 is passed through the mast profile and ends rotatably in a pipe bend 24 in a rotating coupling 31, so that the subsequent elastic distributor distributor 29 always hangs vertically. If the end distributor hose or the connecting pipe bend is possibly caught on the building, these parts swivel out around the horizontal axis.
  • the horizontal distance of the end distributor hose 29 from the system axis M of the last boom is approximately equal to the horizontal offset of the last two booms, so that the end distributor hose 29 comes to rest on the cover surface or at least part of the cover surface within a hose guide 32.
  • An articulation point according to FIG. 7 consists of the bearing tube 17, which is welded into the stronger arm in each case.
  • the bearing tube has an end bearing surface 19, against which the hub of the neighboring arm comes to rest.
  • the weaker boom is guided via bearing bushes 20 on the bearing tube and secured by the ring 21.
  • the bearing tube 17 is dimensioned so that the conveyor tube intermediate piece can be easily carried out. Expediently, one half of the shell coupling 22 between the conveyor pipe intermediate piece and the pipe bend 24 is elastically attached to the boom.
  • a straight concrete delivery pipe 25 lying in the X-axis plane is held next to the pipe bend 24 in a single holder.
  • This consists of a fixed shell part 26, which is adjustably attached to a tube support 28.
  • the hinge-like shell part 27 provided with a clamping lever, quick assembly and disassembly of the delivery pipes is possible.
  • the shell parts have elastic inserts 29, which exclude tension and thus ensure a tighter closure of the coupling points and do not transmit impacts or noise.
  • the fixed shell bearing parts are attached to the boom by means of elastic brackets 33. Between the cantilever axes M lies the level E of the adjustment device, consisting of the adjustment cylinder, angle lever and handlebar.
  • the bearing blocks on the brackets are marked with 18.
  • FIG 8 the implementation and mounting of the delivery line through the bearing tubes 17 is shown in vertical section.
  • the bracket of the delivery pipe 25 from a fixed shell bearing part 26 with an angle range of over 180 ° is also shown in a side view.
  • the end distributor hose 30 hanging on the last pipe bend 24 rotates in the rotary coupling 31 about a horizontal axis and, when folded, lies down on the adjacent boom in a hose guide 32.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Reciprocating Pumps (AREA)

Abstract

1. A folding, transportable distributing mast, rotatable about a vertical axis, which carries a concrete conveying conduit (25) and which consists of several booms (A, B, C, D) jointed together, characterised in that the two booms (A, B, C, D) of each pair of jointed together booms are arranged adjacent one another in the area of the connecting joints (40, 41, 42) and the concrete conveying conduit (25) is conducted through the joint mountings in such a way that the two booms (A, B, C, D) exhibit two parallel vertical rotational planes, in which the booms can rotate without mutual interference.

Description

Die Erfindung betrifft einen um eine senkrechte Achse drehbaren, zusammenfaltbaren transportablen Verteilermast, der ein Betonförderrohr trägt und der aus mehreren gelenkig aneinander angeschlossenen Auslegern bestehtThe invention relates to a foldable, transportable placing boom rotatable about a vertical axis, which carries a concrete delivery pipe and which consists of a plurality of articulated booms

Eine Betonpumpe ist im allgemeinen in ein Transportfahrzeug eingebaut, das auch einen Verteilermast für das Betonförderrohr trägt, um den Beton an die Verarbeitungsstelle heranzubringen. Aus Transportgründen ist es notwendig, den Verteilermast aus mehreren Teilen zusammenzusetzen, die sich gelenkig aneinander anschließen und wobei im Bereich der Gelenke Verstelleinrichtungen vorgesehen sind, um den Verteilermast zusammenzufalten bzw. aufzurichten.A concrete pump is generally installed in a transport vehicle that also carries a placing boom for the concrete delivery pipe to bring the concrete to the processing site. For reasons of transport, it is necessary to assemble the placing boom from several parts which are connected to one another in an articulated manner and wherein adjusting devices are provided in the area of the joints in order to fold up or erect the placing mast.

Ein derartiger Verteilermast ist aus der DE-A-1 923 602 bekannt. Dieser Verteilermast besteht aus einer Anzahl von aneinander angelenkten Auslegem, die aus mit Kreuzstreben verbundenen Seitenteilen bestehen. Im zusammengefalteten Zustand liegen die Ausleger übereinander, wobei die Zusammenfaltung z.B. nach Art einer Rollfaltung oder auch nach Art einer Z-Faltung möglich ist. Bei dem vorbekannten Verteilermast ist das Betonförderrohr derart verlegt, daß die einzelnen Abschnitte des Betonförderrohrs an den Gelenklagerungen angeschlossen sind, die die gelenkigen Verbindungen der einzelnen Ausleger bilden. Die Lagerelemente der Gelenklagerungen sind hohl gestaltet, so daß der Betonstrom durch diese hindurchgeführt wird. Eine solche Anordnung hat den Nachteil, daß infolge des durch den Betonstrom verursachten Verschleißes jeweils die kompletten Lager ausgewechselt werden müssen.Such a placing boom is known from DE-A-1 923 602. This placing boom consists of a number of articulated brackets which consist of side parts connected with cross braces. In the folded state, the booms are on top of each other, the folding e.g. in the manner of a roll fold or also in the manner of a Z fold is possible. In the previously known placing boom, the concrete delivery pipe is laid in such a way that the individual sections of the concrete delivery pipe are connected to the articulated bearings which form the articulated connections of the individual booms. The bearing elements of the articulated bearings are hollow so that the concrete flow is passed through them. Such an arrangement has the disadvantage that the entire bearing must be replaced due to the wear caused by the concrete flow.

Infolge der Bauweise ergibt sich für den vorbekannten Verteilermast trotz der Zusammenfaltung ein beträchtlicher Platzbedarf, der insbesondere auch bedingt ist durch die Verstelleinrichtungen zwischen den einzelnen Auslegern.As a result of the design, the known distribution boom, despite being folded up, takes up a considerable amount of space, which is also due in particular to the adjustment devices between the individual booms.

Da es erwünscht ist, die Reichweite der Verteilermaste möglichst groß zu halten, ist es notwendig, entweder die Zahl der Ausleger zu erhöhen oder die Länge der einzelnen Ausleger. Dies ist jedoch nur in Grenzen möglich. Wegen der Transportierbarkeit ist die Länge des größten Auslegers begrenzt und bei einer größeren Zahl von Auslegern ergeben sich erhebliche Bauhöhen in der Transportstellung. Hinzu kommt, daß der Gesamtschwerpunkt des zusammengefalteten Verteilermastes verhältnismäßig hoch liegt, was die Kurvenfahrsicherheit beeinträchtigt. Dies gilt vor allem bei der sogenannten Rollfaltung nach unten, bei der der in der Gebrauchsstellung unterste Ausleger die oberste Stellung einnimmt. Dieser Ausleger ist aber am stabilsten und schwersten ausgebildet.Since it is desirable to keep the reach of the placing booms as large as possible, it is necessary to either increase the number of booms or the length of the individual booms. However, this is only possible within limits. Because of the portability, the length of the largest boom is limited and with a larger number of booms there are considerable heights in the transport position. In addition, the overall center of gravity of the folded boom is relatively high, which affects cornering safety. This applies above all to the so-called roll folding downwards, in which the bottom boom in the use position occupies the top position. This boom is the most stable and heaviest.

Die größere Zahl der Ausleger bedingt eine größere Zahl von Verstelleinrichtungen entlang des aufgerichteten Verteilermastes. Dadurch wächst die Gefahr, daß diese Teile beschädigt werden oder daß Unfälle entstehen durch Hängenbleiben an Schalungs- oder Bauwerksteilen.The larger number of booms requires a larger number of adjustment devices along the erected boom. This increases the risk that these parts will be damaged or that accidents will result from getting caught on formwork or structural parts.

Die Notwendigkeit, drei oder mehr Ausleger auf engem Raum zusammenzufalten, führt zu einer komplizierten Ausgestaltung aller Teile, und zwar der Ausleger, der Verstelleinrichtung und auch der einzelnen Teile des Betonförderrohres.The need to fold three or more brackets in a confined space leads to a complicated configuration of all parts, namely the boom, the adjusting device and also the individual parts of the concrete delivery pipe.

Es ist Aufgabe der Erfindung, einen Verteilermast der eingangs beschriebenen Art dahingehend zu verbessern, daß der Aufbau der Einzelteile einfacher ist und daß es relativ leicht möglich ist, eine größere Zahl von Auslegern für die Transportstellung zusammenzufalten.It is an object of the invention to improve a placing boom of the type described in the introduction in such a way that the structure of the individual parts is simpler and that it is relatively easy to fold a larger number of brackets for the transport position.

Zur Lösung dieser Aufgabe schlägt die Erfindung vor, daß je zwei aneinander angeschlossene Ausleger im Bereich der Verbindungsgelenke nebeneinander angeordnet sind und das Betonförderrohr durch die Gelenklagerungen hindurchgeführt ist, derart, daß je zwei aufeinanderfolgende Ausleger zwei parallele lotrechte Rotationsebenen aufweisen, in denen die Ausleger ohne gegenseitige Behinderung rotieren können.To achieve this object, the invention proposes that two mutually connected booms are arranged next to one another in the area of the connecting joints and the concrete delivery pipe is guided through the articulated bearings in such a way that two successive booms each have two parallel vertical rotation planes in which the booms are without mutual Disability can rotate.

Während bisher ein Verteilermast für den in Rede stehenden Zweck eine solche Ausbildung aufweist, daß er im wesentlichen symmetrisch ist zu einer senkrechten Mittelebene, schlägt die Erfindung eine Bauweise vor, in der zwei aneinander angeschlossene Ausleger im Bereich des Verbindungsgelenkes nebeneinander angeordnet sind. Im zusammengefalteten Zustand liegen dann aneinander angeschlossene Ausleger mit wesentlichen Teilen nebeneinander. Es ist klar, daß hierdurch im zusammengefalteten Zustand fast die doppelte Menge an Auslegern auf einem Transportfahrzeug untergebracht werden können, da die einzelnen Ausleger sozusagen auf zwei Stapeln nebeneinander transportiert werden.So far, a placing boom for the purpose in question has such a design that it is essentially symmetrical to a vertical central plane, the invention proposes a construction in which two mutually connected booms are arranged side by side in the area of the connecting joint. In the folded state, the cantilevers are connected to one another with essential parts. It is clear that almost double the amount of arms can be accommodated on a transport vehicle in this way when folded, since the individual arms are transported on two stacks, so to speak.

Die Erfindung löst auch das Problem des Zusammenfaltens der Betonförderleitung, und zwar dadurch, daß die Betonförderleitung durch die Gelenklagerungen hindurchgeführt ist. Es wurde gefunden, daß die sich dadurch ergebenden Krümmungen weder baulich noch für die Betonförderung nennenswerte Nachteile bringen. Es wird aber der erhebliche Vorteil gewonnen, daß die Betonförderleitung leicht in jede gewünschte Stellung gebracht werden kann, ohne daß an den Stellen, an denen sich die einzelnen Rohre relativ zueinander bewegen, Schwierigkeiten auftreten.The invention also solves the problem of collapsing the concrete delivery line in that the concrete delivery line is passed through the hinge bearings. It has been found that the resulting curvatures do not bring any significant disadvantages either structurally or for concrete delivery. However, the considerable advantage is gained that the concrete delivery line can easily be brought into any desired position without difficulties occurring at the points at which the individual pipes move relative to one another.

Von besonderem Vorteil ist bei der Erfindung, daß die einzelnen Ausleger und die zugehörigen Einrichtungen weitgehend gleichartig ausgebildet sein können, was die Herstellung wesentlich vereinfacht. Hinzu kommt, daß die Bauweise des einzelnen Mastes an sich einfach ist. Die Art der Zusammenlegung verlangt keine Abkröpfungen im Bereich der Gelenke. Im allgemeinen genügt es, wenn die einzelnen Ausleger im zusammengefalteten Zustand in zwei Vertikalebenen nebeneinander angeordnet sind. Für Spezialfälle ist es jedoch nicht ausgeschlossen, mehr als zwei "Stapel" zu bilden.It is of particular advantage in the invention that the individual booms and the associated devices can be of largely identical design, which considerably simplifies production. In addition, the construction of the single mast is simple in itself. The type of merging does not require any bends in the area of the joints. In general, it is sufficient if the individual booms are arranged next to one another in two vertical planes in the folded state. In special cases, however, it is not excluded to form more than two "stacks".

Es ist gefunden worden, daß es durchaus möglich ist, eine fliegende Lagerung des jeweils getragenen Auslegers am tragenden Ausleger anzuwenden. Die auftretenden Verbindungskräfte können gut aufgefangen werden. Dadurch erhält jeder Ausleger eine große Beweglichkeit, die im wesentlichen nur begrenzt ist durch den Verstellbereich der zugeordneten Verstelleinrichtungen.It has been found that it is entirely possible to use a floating mounting of the boom that is carried on the load-bearing boom. The connecting forces that occur can be easily absorbed. This gives each boom great mobility, which is essentially only limited by the adjustment range of the associated adjustment devices.

Besonders günstig ist es, wenn, wie die Erfindung weiter vorschlägt, die Verbindungsgelenke zwischen zwei Auslegern in der Mittelebene der Ausleger angeordnet und die Verstelleinrichtung auf derjenigen Seite der Ausleger angeordnet ist, die bei waagerechter Arbeitsstellung die obere Seite ist. Die Erfindung nutzt hierbei den Vorteil aus, der darin besteht, daß teure Abkröpfungen an den einzelnen Auslegern unnötig sind. Wenn alle Verstelleinrichtungen auf der Oberseite angeordnet werden, vermindert sich auch die Gefahr, mit dem Verteilermast an Bauteilen hängen zu bleiben bzw. die Verstelleinrichtungen zu beschädigen.It is particularly favorable if, as the invention further proposes, the connecting joints between two brackets are arranged in the middle plane of the brackets and the adjusting device is arranged on the side of the brackets which is the upper side in a horizontal working position. The invention takes advantage of the fact that expensive bends on the individual arms are unnecessary. If all the adjustment devices are arranged on the top, the risk of getting caught on components with the placing boom or damaging the adjustment devices is also reduced.

Ein weiterer Vorteil der erfindungsgemäßen Ausbildung ergibt sich aus dem Umstand, daß die Hindurchführung der Betonförderleitung durch die Verbindungsgelenke einerseits eine entsprechende Dimensionierung dieser Gelenke verlangt, die dadurch aber wiederum gut in der Lage sind, die bei der erfindungsgemäßen Bauweise auftretenden Biege- und Torsionskräfte aufzunehmen.Another advantage of the design according to the invention results from the fact that the passage of the concrete delivery line through the connecting joints on the one hand requires a corresponding dimensioning of these joints, which in turn are, however, well able to absorb the bending and torsional forces occurring in the construction according to the invention.

Die Erfindung schlägt ferner vor, daß das Endstück des Betonförderrohres an einem Rohrbogen hängt, der in einer Drehkupplung um eine horizontale Achse drehbar ist und in der Transportstellung in einem Führungsteil eines Auslegers ruht.The invention further proposes that the end piece of the concrete delivery pipe hangs on a pipe bend which is rotatable about a horizontal axis in a rotating coupling and rests in a guide part of a boom in the transport position.

Günstig ist es, wenn der einem Ausleger zugeordnete Teil des Betonförderrohres jeweils parallel neben dem Ausleger angeordnet ist. Dabei ist es leicht möglich, die Abstände des Betonförderrohres vom Ausleger bei allen Auslegern gleich zu halten, so daß gleiche Verbindungs- und Befestigungsmittel zwischen Betonförderrohr und Ausleger angewandt werden können.It is expedient if the part of the concrete delivery pipe assigned to a boom is arranged in parallel next to the boom. It is easily possible to keep the distances of the concrete delivery pipe from the boom the same for all booms, so that the same connection and fastening means can be used between the concrete delivery pipe and the boom.

Die erfindungsgemäße Ausbildung kann bei einer Z-Faltung nach oben angewandt werden, aber auch bei einer Rollfaltung nach unten. Die Verstelleinrichtungen sind sinngemäß anzuordnen.The design according to the invention can be applied with a Z-fold upwards, but also with a roll fold downwards. The adjustment devices are to be arranged accordingly.

Die Erfindung betrifft weiter eine vorteilhafte Ausgestaltung der Befestigungen des Betonförderrohres an den Auslegern, was die Montage und Demontage erleichtert. Durch elastische Einlagen in den Halterungen wird erreicht, daß keine Stöße oder Zwangskräfte in die Traggkonstruktion übertragen werden.The invention further relates to an advantageous embodiment of the fastenings of the concrete delivery pipe on the brackets, which facilitates assembly and disassembly. Elastic inserts in the brackets ensure that no shocks or constraining forces are transmitted to the supporting structure.

Die Erfindung wird im folgenden anhand einer Zeichnung dargestellt und näher erläutert. Es zeigen

  • Figur 1 eine fahrbare Betonpumpe mit einem Verteilermast für eine nach unten gerichtete Rollfaltung gemäß der Erfindung,
  • Figur 2 eine fahrbare Betonpumpe mit Verteilermast für eine Z-Faltung nach oben,
  • Figur 3 eine Seitenansicht eines aus drei Teilen bestehenden Verteilerrnastes,
  • Figur 4 eine Draufsicht zur Darstellung der Figur 3,
  • Figur 5 ein abgewandeltes Ausführungsbeispiel der Erfindung mit einem aus drei Teilen bestehenden Verteilermast mit verlängerten Auslegern, der für eine Z-Fattung nach oben gedacht ist,
  • Figur 6 eine Draufsicht zum Ausführungsbeispiel nach Figur 5,
  • Figur 7 eine Einzelheit der Gelenkausbildung zwischen zwei Auslegern in der Draufsicht bzw. im teilweisen Schnitt,
  • Figur 8 einen vertikalen Schnitt durch einen Verteilermast mit drei Auslegern und
  • Figur 9 eine Draufsicht auf die Förderrohrhalterung entlang eines Auslegers.
The invention is illustrated below with reference to a drawing and explained in more detail. Show it
  • FIG. 1 shows a mobile concrete pump with a placing boom for a downward folding according to the invention,
  • FIG. 2 shows a mobile concrete pump with a placing boom for a Z-fold upwards,
  • FIG. 3 shows a side view of a distributor latch consisting of three parts,
  • FIG. 4 shows a plan view to illustrate FIG. 3,
  • FIG. 5 shows a modified exemplary embodiment of the invention with a three-part placing boom with extended arms, which is intended for a Z-type upward,
  • FIG. 6 shows a top view of the exemplary embodiment according to FIG. 5,
  • FIG. 7 shows a detail of the articulation between two arms in plan view or in partial section,
  • Figure 8 is a vertical section through a boom with three arms and
  • Figure 9 is a plan view of the conveyor tube holder along a boom.

In der Darstellung nach den Figuren 1 und 2 ist die Pumpeneinheit 2 über den Triebachsen des Fahrgestells 1 geneigt eingebaut, um eine möglichst niedrige Einfüllkante im Aufgabetrichter 3 zu erhalten. Die Abförderleitung 4 verläuft beispielsweise seitlich oder auch über den Aufgabetrichter 4 zum Verteilermast, der aus den Auslegern A, B, C und gegebenenfalls D besteht. Die Drehachse 8 des Verteilermastes läßt eine Verdrehung, z.B. um 360° zu. Sie ist in der Nähe des Fahrerhauses angeordnet.In the illustration according to FIGS. 1 and 2, the pump unit 2 is installed inclined over the drive axles of the chassis 1 in order to obtain the lowest possible filling edge in the feed hopper 3. The discharge line 4 runs, for example, laterally or also via the feed hopper 4 to the placing boom, which consists of the brackets A, B, C and optionally D. The axis of rotation 8 of the placing boom allows twisting, e.g. by 360 °. It is located near the cab.

Der Hilfsrahmen 6 der Pumpe, welcher Teil des Stützbockes 5 des Verteilermastes ist, ist auf dem Fahrzeugrahmen verankert und die in der Betriebsstellung erforderlichen Auslegestützen 7 sind am Stützbock 5 gelagert und werden zum Transport an das Fahrgestell angeschwenkt.The auxiliary frame 6 of the pump, which is part of the support frame 5 of the placing boom, is anchored on the vehicle frame and the extension supports 7 required in the operating position are mounted on the support frame 5 and are pivoted to the chassis for transport.

Das mit dem Stützpunkt 5 verbundene feststehende Ständerpaar 10 (siehe Figur 3) trägt über ein Drehwerk in Form einer Lagersäule oder einer Kugeldrehverbindung 11 den Lagerkopf mit dem Hauptlager 10 des Auslegers A. Der Verteilermast ist mittels des Drehantriebs 9 um die Achse 8 drehbar.The fixed stand pair 10 connected to the base 5 (see FIG. 3) carries the bearing head with the main bearing 10 of the boom A via a rotating mechanism in the form of a bearing column or a ball slewing ring 11. The placing boom can be rotated about the axis 8 by means of the rotary drive 9.

Da der hintere Überstand des zusammengefalteten Verteilermastes begrenzt ist, bedingt dies die Länge des Auslegers A im Ausführungsbeispiel nach der Figur 1. Die Ausleger B, C und D, die mittels der Gelenke 40 bzw. 41 und 42 angelenkt sind, können beim Ausführungsbeispiel nach der Figur 1 nur kürzer sein als der Ausleger A. Es ist klar, daß für eine bestimmte Reichweite eine entsprechende Anzahl von Auslegern erforderlich ist.Since the rear overhang of the folded placing boom is limited, this results in the length of the boom A in the embodiment according to FIG. 1. The boom B, C and D, which are articulated by means of joints 40 or 41 and 42, can be used in the embodiment according to FIG Figure 1 is only shorter than the boom A. It is clear that a corresponding number of booms is required for a certain range.

Die Grundhöhe ho der Pumpeneinheit, bestimmt durch die Bauhöhe der Hydraulikzylinder bzw. der Steuerung auf der Aufgabetrichterseite, bildet die untere Begrenzung für Auslegerteile, während die obere Begrenzung durch das zulässige Transportmaß gebildet wird. Wenn nun jeweils zwei Ausleger im zusammgeklappten Zustand mindestens teilweise nebeneinander liegen, dann kann auf der Resthöhe entsprechend der Erfindung fast die doppelte Auslegerzahl, also beinahe doppelte Reichweite untergebracht werden.The basic height ho of the pump unit, determined by the overall height of the hydraulic cylinders or the control on the feed hopper side, forms the lower limit for boom parts, while the upper limit is formed by the permissible transport dimension. If two booms are at least partially next to each other in the folded state, then almost twice the number of booms, ie almost twice the reach, can be accommodated at the remaining height according to the invention.

Der sich ergebende Gesamtschwerpunkt S, S1 des zusammengeklappten Verteilermastes hat starken Einfluß auf die Wahl des Fahrgestelles und dessen Radstand und umgekehrt. Liegt beispielsweise der Gesamtschwerpunkt der Pumpe mit Verteilermast zu weit hinten, dann werden die Fahr- und insbesondere Manövrierverhältnisse durch Vorderachsentlastung beeinträchtigt bzw. es sind Fahrgestelle mit verlängertem Radstand erforderlich. Die Figuren 1 und 2 machen diese Schwerpunktlage des Verteilermastes in der Höhe und zu den Achsen deutlich, für Rollfaltung nach unten (Fig. 1) und Z-Faltung nach oben (Fig. 2). Die erfindungsgemäße Ausbildung eines Verteilermastes ist für beliebige Faltweise einsetzbar.The resulting center of gravity S, S1 of the folded placing boom has a strong influence on the choice of the chassis and its wheelbase and vice versa. For example, if the overall center of gravity of the pump with the placing boom is too far to the rear, then the driving and especially maneuvering conditions are adversely affected by front axle relief or chassis with an extended wheelbase are required. Figures 1 and 2 make this center of gravity of the placing boom clear in height and to the axes, for roll folding downwards (Fig. 1) and Z-folding upwards (Fig. 2). The construction of a placing boom according to the invention can be used for any folding method.

Der Ausleger A wird, um 12 drehend, durch Hydraulikzylinder 13 um einen Winkel a verstellt. Zweckmäßigerweise ist dieser Hauptverstellzylinder als Druckzylinder von unten wirksam. Ausleger B, C und weitere werden über Hydraulikzylinder 14,15, Winkelhebel/Lenker-Kombinationen 16 jeweils um β verschwenkt.The boom A, rotating by 12, is adjusted by an angle a by hydraulic cylinders 13. This main adjusting cylinder is expediently effective as a pressure cylinder from below. Boom C, C and others are pivoted by β via hydraulic cylinders 14, 15, angle levers / handlebar combinations 16.

Lediglich bei der Z-Faltmethode liegt der Antriebszylinder für Ausleger B noch unten, für alle folgenden Ausleger ist erfindungsgemäß gleiche Anordnung der Bewegungsteile für beide Faltmethoden auf den Auslegern vorgesehen.Only with the Z-folding method is the drive cylinder for boom B still below, for all following booms the same arrangement of the moving parts for both folding methods is provided according to the invention on the booms.

Liegen nun die Drehpunkte der Ausleger in der Mastachse M, dann überdecken sich die Ausleger in der Seitenansicht wenigstens teilweise, wie in Figur 3 strichpunktiert gezeigt. Eine volle Überdeckung zweier benachbarter Ausleger ist nicht möglich, weil jeweils das durch die Mastachse geführte Förderrohr an der Unterseite des Nachbarteiles zur Anlage kommen würde.If the pivot points of the brackets now lie in the mast axis M, then the brackets at least partially overlap in the side view, as shown in broken lines in FIG. A full overlap of two adjacent brackets is not possible, because the feed pipe led through the mast axis would come to rest on the underside of the neighboring part.

Die Hydraulikzylinder mit Winkelhebel und Lenker sind nach Figuren 3 und 4 oben auf den Auslegern und in einer Ebene zwischen den Auslegern angeordnet. Diese Anordnung gilt auch für alle weiteren Ausleger, die nicht dargestellt sind. Die Abstützböcke sitzen in Betriebsstellung oben auf den Auslegern.According to FIGS. 3 and 4, the hydraulic cylinders with an angle lever and handlebar are arranged on top of the booms and in one plane between the booms. This arrangement also applies to all other booms, which are not shown. In the operating position, the jacks sit on top of the brackets.

Lediglich für Z-Faltung nach oben sind Hydraulikzylinder, Winkelhebel und Lenker unten an Ausleger A und B angebracht; alle weiteren Bewegungsteile von Ausleger C und weiteren nicht dargestellten Auslegern sind in ausgefaltetem Zustand wieder oben angebracht. Damit ergibt sich eine vollkommen freie und unfallschutzwirksame Unterkante der vom Fahrzeug entfernten Ausleger. Die Achse der Betonförderleitung liegt erfindungsgemäß mit Achse M (X-Achse) des zugehörigen Auslegers in derselben horizontalen Ebene. Der horizontale Achsabstand wird zweckmäßigerweise bei allen Auslegern gleich gehalten, so daß einheitliche Elemente für die Halterung erreichbar sind.Hydraulic cylinders, angle levers and handlebars are only attached to booms A and B at the bottom for Z-folding; all other parts of the movement of boom C and other booms, not shown, are in the unfolded state again at the top. This results in a completely free and accident-proof lower edge of the booms removed from the vehicle. According to the invention, the axis of the concrete delivery line lies with the axis M (X axis) of the associated boom in the same horizontal plane. The horizontal center distance is expediently kept the same for all brackets, so that uniform elements for the holder can be reached.

Am letzten Ausleger ist die Betonförderleitung 25 durch das Mastprofil durchgeführt und endet in einem Rohrbogen 24 drehbar in einer Drehkupplung 31, so daß der anschließende elastische Endverteiterschtauch 29 immer senkrecht hängt. Beim eventuellen Verhängen des Endverteilerschlauches oder des Anschlußrohrbogens am Bauwerk schwenken diese Teile um die horizontale Achse aus. Der horizontale Abstand des Endverteilerschlauches 29 von der Systemachse M des letzten Auslegers ist etwa gleich dem horizontalen Versatz der beiden letzten Ausleger, so daß der Endverteilerschlauch 29 auf der Deckfläche oder mindestens einem Teil der Deckfläche innerhalb einer Schlauchführung 32 zur Auflage kommt.On the last boom, the concrete delivery line 25 is passed through the mast profile and ends rotatably in a pipe bend 24 in a rotating coupling 31, so that the subsequent elastic distributor distributor 29 always hangs vertically. If the end distributor hose or the connecting pipe bend is possibly caught on the building, these parts swivel out around the horizontal axis. The horizontal distance of the end distributor hose 29 from the system axis M of the last boom is approximately equal to the horizontal offset of the last two booms, so that the end distributor hose 29 comes to rest on the cover surface or at least part of the cover surface within a hose guide 32.

Ein Gelenkpunkt nach Figur 7 besteht aus dem Lagerrohr 17, welches jeweils im stärkeren Ausleger eingeschweißt ist Das Lagerrohr hat eine Stirnanlagefläche 19, an welcher die Nabe des Nachbarauslegers zur Anlage kommt. Der schwächere Ausleger ist über Lagerbuchsen 20 auf dem Lagerrohr geführt und durch den Ring 21 gesichert.An articulation point according to FIG. 7 consists of the bearing tube 17, which is welded into the stronger arm in each case. The bearing tube has an end bearing surface 19, against which the hub of the neighboring arm comes to rest. The weaker boom is guided via bearing bushes 20 on the bearing tube and secured by the ring 21.

Das Lagerrohr 17 ist so dimensioniert, daß das Förderrohrzwischenstück leicht durchgeführt werden kann. Zweckmäßigerweise ist die eine Hälfte der Schalenkupplung 22 zwischen Förderrohr-Zwischenstück und Rohrbogen 24 elastisch am Ausleger angebracht.The bearing tube 17 is dimensioned so that the conveyor tube intermediate piece can be easily carried out. Expediently, one half of the shell coupling 22 between the conveyor pipe intermediate piece and the pipe bend 24 is elastically attached to the boom.

Ein gerades Betonförderrohr 25 in der X-Achsen-Ebene liegend, ist neben dem Rohrkrümmer 24 gehalten in einer Einfach-Halterung. Diese besteht aus einem feststehenden Schalenteil 26, was anpaßbar auf einem Rohrträger 28 befestigt ist. Mit dem scharnierartigen und mit Klemmhebel versehenen Schalenteil 27 ist Schnellmontage und - demontage der Förderrohre möglich.A straight concrete delivery pipe 25 lying in the X-axis plane is held next to the pipe bend 24 in a single holder. This consists of a fixed shell part 26, which is adjustably attached to a tube support 28. With the hinge-like shell part 27 provided with a clamping lever, quick assembly and disassembly of the delivery pipes is possible.

Die Schalenteile tragen elastische Einlagen 29, die Verspannungen ausschließen und damit ein dichteres Schließen der Kuppelstellen gewährleisten und Stöße bzw. Geräusche nicht weiterleiten.The shell parts have elastic inserts 29, which exclude tension and thus ensure a tighter closure of the coupling points and do not transmit impacts or noise.

Die feststehenden Schalenlagerteile werden erfindungsgemäß mittels elastischen Halterungen 33 am Ausleger befestigt. Zwischen den Auslegerachsen M liegt die Ebene E der Verstelleinrichtung, bestehend aus Verstellzylinder, Winkelhebel und Lenker. Mit 18 sind die Lagerböcke auf den Auslegern gekennzeichnet.The fixed shell bearing parts are attached to the boom by means of elastic brackets 33. Between the cantilever axes M lies the level E of the adjustment device, consisting of the adjustment cylinder, angle lever and handlebar. The bearing blocks on the brackets are marked with 18.

In Figur 8 ist die Durchführung und Halterung der Förderleitung durch die Lagerrohre 17 im Vertikalschnitt dargestellt. Hier ist auch die Halterungsschelle des Förderrohres 25 aus einem feststehenden Schalenlagerteil 26 mit über 180° Winkelbereich in Seitenansicht gezeigt. Der am letzten Rohrbogen 24 hängende Endverteilerschlauch 30 dreht sich in der Drehkupplung 31 um eine horizontale Achse und legt sich beim Zusammenfalten in eine Schlauchführung 32 auf den benachbarten Ausleger.In Figure 8, the implementation and mounting of the delivery line through the bearing tubes 17 is shown in vertical section. Here, the bracket of the delivery pipe 25 from a fixed shell bearing part 26 with an angle range of over 180 ° is also shown in a side view. The end distributor hose 30 hanging on the last pipe bend 24 rotates in the rotary coupling 31 about a horizontal axis and, when folded, lies down on the adjacent boom in a hose guide 32.

Je nach Ausleger bzw. Förderrohr-Teillänge werden entlang der Ausleger gleichartige Halterungen entsprechend Figur 9 angebracht. Für je zwei Halteschalen 26, 27 ist nur ein Rohrträger 28 erforderlich. Eine derartige Halterung ermöglicht eine schnelleDepending on the boom or conveyor tube part length Similar brackets according to FIG. 9 are attached along the boom. Only one tube support 28 is required for two holding shells 26, 27. Such a holder allows a quick

Montage/Demontage eines Rohrteilstückes, wobei das Nachbarrohrstück seine Lage nicht verändert.Assembly / disassembly of a pipe section, whereby the neighboring pipe section does not change its position.

Claims (9)

1. A folding, transportable distributing mast, rotatable about a vertical axis, which carries a concrete conveying conduit (25) and which consists of several booms (A, B, C, D) jointed together, characterised in that the two booms (A, B, C, D) of each pair of jointed together booms are arranged adjacent one another in the area of the connecting joints (40,41,42) and the concrete conveying conduit (25) is conducted through the joint mountings in such a way that the two booms (A, B, C, D) exhibit two parallel vertical rotational planes, in which the booms can rotate without mutual interference.
2. A distributing mast according to claim 1, characterised by a flying mounting on the carrying boom (A, B, C) for each carried boom (B, C, D).
3. A distributing mast according to one or both of the preceding claims, characterised in that the connecting joints (40, 41, 42) between two booms are located in the central plane of the booms in question and the setting mechanism (14, 15, 16, 18) is located on that side of the boom which is uppermost when in the vertical operating position.
4. A distributing mast according to one or more of the preceding claims, characterised in that the end (30) of the concrete conveying conduit hangs from an L-bend (24) which is rotatable about a horizontal axis on a swivel joint (31) and which in the transport position rests in an adapter (32) of a boom.
5. A distributing mast according to one or more of the preceding claims, characterised in that the section of the concrete conveying conduit (25) which is associated with a boom (A, B, C, D) lies parallel adjacent to this boom (A, B, C, D).
6. A distributing mast according to one or more of the preceding claims, characterised in that the individual sections of the concrete conveying conduit (25) are fixed to the booms (A, B, C, D) by means of resilient members.
7. A distributing mast according to one or more of the preceding claims, characterised in that the sections of the concrete conveying conduit (25) on both sides of a coupling point are connected with the booms (A, B, C, D) by means of resilient mounting supports with snap fasteners (26, 27, 29).
8. A distributing mast according to claim 7, characterised in that the mounting supports are configured in a hinge-like manner and are provided with a resilient insert (29).
9. A distributing mast according to one or more of the preceding claims, characterised in that the coupling point in the concrete conveying conduit (25) between an L-bend (24) and a transit through a connecting joint consists of two dishes (22, 23), with the lower dish section being supported on the pertinent boom by means of a resilient element (33).
EP81102562A 1980-04-05 1981-04-04 Distributing mast for a concrete pump Expired EP0037571B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81102562T ATE20373T1 (en) 1980-04-05 1981-04-04 DISTRIBUTION BOOM FOR A CONCRETE PUMP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803013450 DE3013450A1 (en) 1980-04-05 1980-04-05 DISTRIBUTION POLE OF A CONCRETE PUMP
DE3013450 1980-04-05

Publications (3)

Publication Number Publication Date
EP0037571A2 EP0037571A2 (en) 1981-10-14
EP0037571A3 EP0037571A3 (en) 1982-03-10
EP0037571B1 true EP0037571B1 (en) 1986-06-11

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ID=6099486

Family Applications (1)

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EP81102562A Expired EP0037571B1 (en) 1980-04-05 1981-04-04 Distributing mast for a concrete pump

Country Status (3)

Country Link
EP (1) EP0037571B1 (en)
AT (1) ATE20373T1 (en)
DE (1) DE3013450A1 (en)

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CN104641058A (en) * 2012-08-02 2015-05-20 普茨迈斯特工程有限公司 Concrete dispensing boom for concrete pumps
EP3622132B1 (en) 2017-05-12 2021-03-24 Putzmeister Engineering GmbH Distribution boom for mobile concrete pumps comprising joints for adjacent arms, and mobile concrete pump

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US4474213A (en) * 1982-02-08 1984-10-02 Fmc Corporation Folding service line
US4519768A (en) * 1982-10-29 1985-05-28 Takenaka Komuten Co., Ltd. Apparatus for horizontally casting concrete
DE3311736A1 (en) * 1983-03-30 1984-10-04 Takenaka Komuten Co. Ltd., Osaka Apparatus for lifting loads and for placing concrete
DE3445130A1 (en) * 1984-12-11 1986-02-20 Maschinenfabrik Walter Scheele GmbH & Co KG, 4750 Unna-Massen Multi-armed concrete-distributing device
DE3446290A1 (en) * 1984-12-19 1986-06-26 Karl Dipl.-Ing. 7000 Stuttgart Schlecht Concrete-distributing mast
IT1187983B (en) * 1986-04-14 1987-12-23 Jacques Tranchero SELF-PORTABLE ARTICULATED ARM CRANE INCLUDING THREE HYDRAULIC LIFTING STAGES
ITMI20060141U1 (en) * 2006-04-20 2006-07-20 Cifa Spa TRUCK PUMP FOR CONCRETE WITH INCREASED EXTENSION OF THE ARTICULATED SUPPORT ARM AND SHAPE INCLUDED IN THE LIMITS ENVISAGED BY THE EUROPEAN STANDARD FOR FREE ROAD CIRCULATION
DE102011077346A1 (en) * 2011-06-10 2012-12-13 Putzmeister Engineering Gmbh Clutch coupling and its use
CN102383603B (en) 2011-08-19 2014-01-15 三一汽车制造有限公司 Concrete pump truck and arm support device thereof
DE102012207568A1 (en) * 2012-04-13 2013-10-17 Putzmeister Engineering Gmbh Manufacturing method for a mast arm and concrete distributor mast
DE102012215469A1 (en) 2012-08-31 2014-03-06 Putzmeister Engineering Gmbh Concrete placing boom
CN115110517B (en) * 2022-07-23 2023-11-10 河南省中州公路工程有限公司 Soft foundation reinforcing equipment

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US4109681A (en) * 1974-05-06 1978-08-29 Tornborg & Lundberg Ab Hoisting crane for building purposes
GB1538867A (en) * 1975-12-18 1979-01-24 Nat Supply Co Ltd Articulated arms
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104641058A (en) * 2012-08-02 2015-05-20 普茨迈斯特工程有限公司 Concrete dispensing boom for concrete pumps
CN104641058B (en) * 2012-08-02 2016-09-28 普茨迈斯特工程有限公司 Concrete placing boom for concrete pump
EP3622132B1 (en) 2017-05-12 2021-03-24 Putzmeister Engineering GmbH Distribution boom for mobile concrete pumps comprising joints for adjacent arms, and mobile concrete pump

Also Published As

Publication number Publication date
ATE20373T1 (en) 1986-06-15
EP0037571A3 (en) 1982-03-10
DE3013450A1 (en) 1981-10-08
EP0037571A2 (en) 1981-10-14

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