EP3592922B1 - Boom system having a retracted position which reduces installation space - Google Patents

Boom system having a retracted position which reduces installation space Download PDF

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Publication number
EP3592922B1
EP3592922B1 EP18711254.5A EP18711254A EP3592922B1 EP 3592922 B1 EP3592922 B1 EP 3592922B1 EP 18711254 A EP18711254 A EP 18711254A EP 3592922 B1 EP3592922 B1 EP 3592922B1
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EP
European Patent Office
Prior art keywords
boom arm
recess
boom
folded
arm system
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EP18711254.5A
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German (de)
French (fr)
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EP3592922A1 (en
Inventor
Jens HÄFNER
Peter MÖGLE
Ansgar MÜLLER
Knut Kasten
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Putzmeister Engineering GmbH
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Putzmeister Engineering GmbH
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Publication of EP3592922A1 publication Critical patent/EP3592922A1/en
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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
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
    • 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 present invention relates to a cantilever arm system, and in particular to a cantilever arm system for a (mobile) concrete conveying device.
  • concrete conveying devices comprise a cantilever arm system formed from a plurality of cantilever arms pivotably connected to one another, in which the individual cantilever arms come to rest on one another in the folded state.
  • the aim is to ensure that the cantilever arms require as little space as possible in their folded-in position and that the concrete conveying device thus has the lowest possible height that is in accordance with road traffic regulations (cf. DE 10 2008 013 990 A1 ).
  • the EP 2 039 498 A2 discloses a concrete conveyor with sectional extensions of the side walls of the boom arms in which holes with metal sleeves are provided. The extensions are used to attach the hydraulic cylinders.
  • the basic idea of the invention consists in inserting a cantilever arm in the folded-in position into a recess formed in another, for example adjacent cantilever arm, in order to reduce the overall height.
  • the clear dimension of the recess is slightly wider than the width of the extension arm to be inserted into the recess.
  • the arms can be made lighter with the same load capacity.
  • cantilever arms made of composite material are particularly suitable.
  • Typical composite materials are, for example, carbon fiber reinforced plastics, which are also known by the abbreviation CFK (carbon fiber reinforced plastic).
  • CFRP carbon fiber reinforced plastic
  • sandwich structures can be built up relatively easily.
  • CFRP cantilever arms it is also possible to adapt the wall thickness of the beam to the load; for example, the legs (side walls) can be made more massive than the rest of the arm.
  • fiber composite materials such as the aforementioned CFRP or basalt, aramid, glass fiber or the like are used as composite materials. containing in question.
  • the cantilever arm system can comprise cantilever arms made of steel and cantilever arms made of composite material or also from a composite mix (such as, for example, upper side made of steel and the lower side made of fiber composite material), or all cantilever arms can be made of composite material.
  • the recess can extend essentially over the entire length of the other cantilever arm. Accordingly, the cantilever arm can be inserted into the other cantilever arm over essentially the entire length of the cantilever arm, for example leaving the swivel joint arrangements free. The cantilever arm can be inserted over part of its height or essentially the entire height. If two adjacent cantilever arms have recesses according to the invention, the cantilever arm can each have part of its height in the two recesses, so that it is received essentially completely by the two recesses.
  • Figure 1 shows, as a detail from a cantilever arm system 10 not according to the invention, two adjacent cantilever arms A1, A2 in the folded-in position in cross section.
  • "Adjacent" in the present context are to be understood as two cantilever arms that come to rest in the folded position of the cantilever in such a way that they at least partially run parallel to one another and thus engage one of the arms in a recess of the other arm using the inventive concept can. This does not necessarily mean that the two cantilever arms in question have to be linked directly to one another.
  • the two cantilever arms A1, A2 lie one above the other in the folded-in position shown, as is the case in many folded-in positions.
  • the one in the representation of the Figure 1 Cantilever arm A1 above (receiving arm) has a slightly wider cross-section than arm A2 underneath (arm to be received).
  • the upper extension arm A1 has a recess 12.
  • the recess 12 extends in the longitudinal direction along the extension arm A1.
  • the recess 12 extends, for example, essentially over the entire length of the cantilever arm A1.
  • the recess 12 can be designed in the shape of a channel.
  • the recess usually extends between the joint areas of the cantilever arm and leaves the joint areas free.
  • the recess 12 is formed on a lower chord UG of the upper extension arm A1.
  • the recess 12 can be lengthened are formed by left and right side surfaces S of the cantilever arm A1.
  • the side surfaces S protrude beyond the lower chord UG in such a way that the extensions V1 formed thereby form the recess 12 for receiving the adjacent cantilever arm A2.
  • the extensions V1 and the cantilever arm A1 can also be formed by joining two U-profiles. Possible manufacturing variants are readily apparent to the person skilled in the art.
  • the inside width of the recess 12, i.e. the distance between the two extensions V1, is slightly wider than the cross section of the lower extension arm A2, so that it is received in the recess 12 when the extension arms A1, A2 are in the folded-in position.
  • the extensions V1 of the upper extension arm A1 protrude about up to half of the height of the lower extension arm A2.
  • the lower cantilever arm A2 is thus partially received in the recess 12 above it.
  • the dimensions of the recess and the extension arms can, however, also be selected such that the lower extension arm is received in the recess essentially completely or completely in terms of height, as is the case in the exemplary embodiment of FIG Figure 3 is indicated.
  • FIG Figure 2 shows one of the representation of the Figure 1 Similar arrangement with an additional extension arm A3, which in the folded-in position comes to lie below the previously lower extension arm A2.
  • a recess 14 according to the invention with extensions V3 of the side surfaces S is formed on an upper chord OG of the lowermost cantilever arm A3 and serves to accommodate the (now central) cantilever arm A2 located above it.
  • Both recesses 12, 14 are designed so that the middle cantilever arm A2 comes to rest approximately halfway in the upper recess 12 and approximately halfway in the lower recess 14 and is thus essentially completely surrounded by the recesses. Divisions other than the essentially halved division shown are also possible.
  • the Figures 3 and 4 show representations of the cantilever arm system with pipe brackets R1, R2, R3 on the cantilever arms A1, A2 and A3.
  • the pipe holders R1, R3 on the cantilever arms A1, A3 with a recess 12, 14 are attached or fastened, as is customary per se, to a side surface S of the respective cantilever arm.
  • the arrangement can, for example, take place centrally in relation to the height of the hollow arm profile (cf. pipe holder R1 of the Figure 3 ). However, it can also make sense not to attach the pipe supports and thus the conveying lines for the concrete in the area of the bend-neutral fiber of the profile (the bend-neutral fiber is in the middle of the profile); Such arrangements are shown for the pipe holders R1, R3 in FIG.
  • the pipe supports R2 of the cantilever arm A2, which is in one or both of the recesses 12, 14 of the adjacent Cantilever arms A1, A3 come to rest are positioned in such a way that they protrude from the recess 12, 14. This is done, for example, by arranging the pipe holder R2 in the area of an end or an edge 20 of the cantilever arm A2, which lies outside the relevant recess 12 (cf. Figure 3 ). If necessary, a groove (not shown in detail) can be provided on the extension V1 of the receiving cantilever arm A1 so that the pipe holder does not act upon or touch the extension in the folded-in position. An embodiment with such a groove is described below with reference to FIG Figures 7 and 8 illustrated.
  • the pipe holder can be arranged approximately centrally on the extension arm A2 and thus protrude between the two extensions V1, V3 of the upper and lower cutouts 12, 14. It is important that folding in and out of the extension arms is not impaired by the arrangement of the pipe brackets.
  • the extensions described on the hollow profiles of the receiving cantilever arms contribute to the rigidity of the cantilever arm structure.
  • the extensions described can also (at least in sections) have a greater wall thickness D than the wall thickness d of the side surfaces or side walls S of the receiving cantilever arms A1, A3, as is indicated in the figures. This improves the stiffness contribution of the extensions.
  • the formation of greater wall thicknesses on the extensions can be easily designed, especially when producing a receiving cantilever arm, by joining two U-profiles. Variable wall thicknesses can be easily implemented, especially when designed using CFRP.
  • Figure 5 shows as a variant an embodiment in which a first section of the extension (adjoining the hollow profile) has essentially the same wall thickness d2 as the side wall S of the hollow profile, while a more distant second section of the extension has a greater wall thickness D2.
  • the extensions of the recess 14 have a thicker wall thickness D2 than the wall thickness d2 of the side surfaces S of the hollow profile.
  • Figure 6 shows a variant of a cantilever arm system not according to the invention with pipe holders R1, R2, R3 using the cantilever arm A2 of FIG Figure 5 .
  • the variant of the Figure 6 comprises three cantilever arms A1, A2, A3 with successively smaller or narrower cross-sections, such that a recess 12 of the first cantilever arm A1 essentially completely accommodates the second cantilever arm A2, which is adjacent (in the folded-in position), and its recess 14 in turn essentially completely accommodates the (in the folded position) adjacent third boom A3 receives.
  • the inner cantilever arms A2, A3 only protrude at the end of the corresponding receiving recess 12 or 14 remote from the hollow profile so far beyond the recess that a pipe holder R2, R3 attached to the cantilever arm A2, A3 extends outside the recess, as has already been done has been explained above.
  • the first cantilever arm A1 has a side wall thickness d1 on its hollow profile, while the extensions V1 (continuously) forming the recess 12 of the first cantilever arm A1 have a thicker wall thickness D1.
  • the wall thickness ratios of the second cantilever arm A2 have already been mentioned above with reference to Figure 5 described.
  • the pipe brackets R1 and R3 of the first and third boom arms A1 and A3 are similar to those in the embodiments of FIG Figures 2 to 4 arranged on an outside of the side wall of the extension V1 (in the case of the first arm A1) or the side surface S of the hollow profile (in the case of the third arm A3).
  • the pipe holder R2 is not arranged on an outside of the extension V2, but on its end face 22 remote from the hollow profile. This configuration enables particularly compact packing / nesting.
  • Figure 7 shows the cantilever arm A2 of Figure 5 with another extension arm A3 received in the recess 14 in the folded-in position
  • Figure 8 shows the cantilever arm A2 in a side view in the direction of the arrow P of Figure 7
  • the inner cantilever arm A3 has a pipe holder R3 which is attached to one (in the illustration of Figure 7 ) the lower area of the side wall S of the boom A3 is attached.
  • the receiving cantilever arm A2 has a groove (or recess) 24 on its extension V2 and in particular on its end face 22 remote from the hollow profile. In the shown folded-in position, the pipeline R3 of the inner extension arm R3 protrudes through the groove 24 as shown. This results in a particularly compact arrangement in the folded-in position of the extension arm system.
  • the installation space of a concrete pump can be used more effectively, so that lighter and stiffer arms can be constructed.

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

Description

Technisches GebietTechnical area

Die vorliegende Erfindung betrifft ein Auslegerarmsystem, und insbesondere ein Auslegerarmsystem für eine (fahrbare) Betonfördervorrichtung.The present invention relates to a cantilever arm system, and in particular to a cantilever arm system for a (mobile) concrete conveying device.

Beschreibung des Standes der TechnikDescription of the prior art

Betonfördervorrichtungen umfassen bekanntermaßen ein aus einer Mehrzahl von schwenkbar miteinander verbundenen Auslegerarmen gebildetes Auslegerarmsystem, bei dem in eingefaltetem Zustand die einzelnen Auslegerarme aufeinander zu liegen kommen. Dabei wird angestrebt, dass die Auslegerarme in ihrer Einfaltstellung möglichst wenig Platz benötigen und die Betonfördervorrichtung somit eine möglichst geringe und in Einklang mit den Straßenverkehrsregelungen stehende Bauhöhe aufweist (vgl. bspw. DE 10 2008 013 990 A1 ).As is known, concrete conveying devices comprise a cantilever arm system formed from a plurality of cantilever arms pivotably connected to one another, in which the individual cantilever arms come to rest on one another in the folded state. The aim is to ensure that the cantilever arms require as little space as possible in their folded-in position and that the concrete conveying device thus has the lowest possible height that is in accordance with road traffic regulations (cf. DE 10 2008 013 990 A1 ).

Aus der DE 600 07 488 T2 ist ein Kranausleger mit zwei aneinandergelenkten Auslegerelementen bekannt, die in einer zusammengeklappten bzw. eingefalteten Position des Auslegers ineinanderersetzbar sind.From the DE 600 07 488 T2 a crane boom with two jib elements articulated to one another is known which can be nested in one another in a folded or folded position of the jib.

Die EP 2 039 498 A2 offenbart eine Betonfördervorrichtung mit abschnittsweisen Verlängerungen der Seitenwände der Auslegerarme, in denen Löcher mit Metallhülsen vorgesehen sind. Die Verlängerungen dienen zur Befestigung der Hydraulikzylinder.the EP 2 039 498 A2 discloses a concrete conveyor with sectional extensions of the side walls of the boom arms in which holes with metal sleeves are provided. The extensions are used to attach the hydraulic cylinders.

Zusammenfassung der ErfindungSummary of the invention

Ausgehend hiervon wird erfindungsgemäß eine Betonfördervorrichtung mit den Merkmalen des Anspruchs 1 bzw. des Anspruchs 2 vorgeschlagen.Based on this, a concrete conveying device with the features of claim 1 and claim 2 is proposed according to the invention.

Der Grundgedanke der Erfindung besteht darin, zur Verringerung der Bauhöhe einen Auslegerarm in der Einfaltstellung in eine in einem anderen, bspw. benachbart liegenden Auslegerarm ausgebildete Aussparung einzulegen. Das lichte Maß der Aussparung ist etwas breiter als die Breite des in die Aussparung einzulegenden Auslegerarms.The basic idea of the invention consists in inserting a cantilever arm in the folded-in position into a recess formed in another, for example adjacent cantilever arm, in order to reduce the overall height. The clear dimension of the recess is slightly wider than the width of the extension arm to be inserted into the recess.

Auf diese Weise kann Bauraum gespart werden und es wird eine bauraumeffektivere Gestaltung des gefalteten Armpakets ermöglicht. Da das Flächenträgheitsmoment und das Widerstandsmoment hauptsächlich von der Höhe des den Auslegerarm bildenden Trägers abhängen, können die Arme so bei gleicher Belastbarkeit leichter ausgeführt werden.In this way, construction space can be saved and a more construction-space-effective design of the folded arm assembly is made possible. Since the geometrical moment of inertia and the moment of resistance mainly depend on the height of the beam forming the cantilever arm, the arms can be made lighter with the same load capacity.

Für die erfindungsgemäße Gestaltung eines Auslegerarmsystems bieten sich insbesondere aus Verbundwerkstoff gefertigte Auslegerarme an. Typische Verbundwerkstoffe sind bspw. kohlenstofffaserverstärkte Kunststoffe, die auch unter der Abkürzung CFK (carbonfaserverstärkter Kunststoff) bekannt sind. Es ist grundsätzlich auch möglich, das erfindungsgemäße Auslegerarmsystem mit Auslegerarmen aus Stahl zu realisieren, allerdings neigt Stahl eher zu geometrischer Instabilität, während bei CFK-Strukturen höhere Wandstärken (bei gleichem oder niedrigerem Gewicht) realisierbar sind. Zudem können relativ einfach Sandwichstrukturen aufgebaut werden. Auch ist es bei CFK-Auslegerarmen möglich, die Wandstärken des Trägers der Belastung anzupassen; so können bspw. die Schenkel (Seitenwände) massiver ausgeführt werden, als der Rest des Armes. Als Verbundwerkstoffe kommen insbesondere (aber nicht ausschließlich) Faserverbundwerkstoffe wie das bereits genannte CFK oder auch Basalt-, Aramid-, Glasfaser o.dgl. enthaltend in Frage.For the design of a cantilever arm system according to the invention, cantilever arms made of composite material are particularly suitable. Typical composite materials are, for example, carbon fiber reinforced plastics, which are also known by the abbreviation CFK (carbon fiber reinforced plastic). In principle, it is also possible to implement the cantilever arm system according to the invention with cantilever arms made of steel, but steel tends to be more geometrically instable, while higher wall thicknesses (with the same or lower weight) can be achieved with CFRP structures. In addition, sandwich structures can be built up relatively easily. With CFRP cantilever arms, it is also possible to adapt the wall thickness of the beam to the load; for example, the legs (side walls) can be made more massive than the rest of the arm. In particular (but not exclusively) fiber composite materials such as the aforementioned CFRP or basalt, aramid, glass fiber or the like are used as composite materials. containing in question.

Das Auslegerarmsystem kann Auslegerarme aus Stahl und Auslegerarme aus Verbundwerkstoff oder auch aus einem Verbundmix (wie bspw. Oberseite aus Stahl und die Unterseite aus Faserverbundmaterial) umfassen, oder es können alle Auslegerarme aus Verbundwerkstoff sein.The cantilever arm system can comprise cantilever arms made of steel and cantilever arms made of composite material or also from a composite mix (such as, for example, upper side made of steel and the lower side made of fiber composite material), or all cantilever arms can be made of composite material.

Die Aussparung kann sich im wesentlichen über die gesamte Länge des anderen Auslegerarms erstrecken. Demzufolge kann das Einlegen des Auslegerarms in den anderen Auslegerarm über im wesentlichen die gesamte Länge des Auslegerarms erfolgen, bspw. unter Freilassung der Drehgelenkanordnungen. Das Einlegen des Auslegerarms kann über einen Teil dessen Höhe oder im wesentlichen die gesamte Höhe erfolgen. Weisen zwei benachbarte Auslegerarme erfindungsgemäße Aussparungen auf, kann der Auslegerarm jeweils anteilig mit einem Teil seiner Höhe in den beiden Aussparungen liegen, derart dass er im wesentlichen vollständig durch die beiden Aussparungen aufgenommen ist.The recess can extend essentially over the entire length of the other cantilever arm. Accordingly, the cantilever arm can be inserted into the other cantilever arm over essentially the entire length of the cantilever arm, for example leaving the swivel joint arrangements free. The cantilever arm can be inserted over part of its height or essentially the entire height. If two adjacent cantilever arms have recesses according to the invention, the cantilever arm can each have part of its height in the two recesses, so that it is received essentially completely by the two recesses.

Weitere Vorteile und Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen, der Beschreibung und der beiliegenden Zeichnung.Further advantages and refinements of the invention emerge from the subclaims, the description and the accompanying drawing.

Es versteht sich, dass die voranstehend genannten und die nachstehend noch zu erläuternden Merkmale nicht nur in der jeweils angegebenen Kombination, sondern auch in anderen Kombinationen oder in Alleinstellung verwendbar sind, solange diese den Rahmen der vorliegenden Erfindung, die allein durch die Ansprüche definiert wird, nicht verlassen.It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively specified combination, but also in other combinations or on their own, as long as they fall within the scope of the present invention, which is defined solely by the claims, do not leave.

Die Erfindung ist anhand eines Ausführungsbeispiels in der Zeichnung schematisch dargestellt und wird im folgenden unter Bezugnahme auf die Zeichnung ausführlich beschrieben.The invention is shown schematically in the drawing using an exemplary embodiment and is described in detail below with reference to the drawing.

Kurzbeschreibung der ZeichnungBrief description of the drawing

  • Figur 1 zeigt als Ausschnitt aus einem nicht erfindungsgemäßen Auslegerarmsystem zwei benachbarte Auslegerarme in der Einfaltstellung im Querschnitt. Figure 1 shows, as a detail from a cantilever arm system not according to the invention, two adjacent cantilever arms in the folded-in position in cross section.
  • Figur 2 zeigt als Ausschnitt aus einer Ausführungsvariante eines nicht erfindungsgemäßen Auslegerarmsystems drei benachbarte Auslegerarme in der Einfaltstellung im Querschnitt. Figure 2 shows, as an excerpt from an embodiment of a cantilever arm system not according to the invention, three adjacent cantilever arms in the folded-in position in cross section.
  • Figur 3 zeigt Auslegerarme ähnlich der Ausführungsvariante der Figur 1 mit Rohrhalterungen. Figure 3 shows cantilever arms similar to the variant of FIG Figure 1 with pipe brackets.
  • Figur 4 zeigt Auslegerarme ähnlich der Ausführungsvariante der Figur 2 mit Rohrhalterungen. Figure 4 shows cantilever arms similar to the variant of FIG Figure 2 with pipe brackets.
  • Figur 5 zeigt eine Variante des ersten Auslegerarms der Figur 1. Figure 5 shows a variant of the first cantilever arm of Figure 1 .
  • Figur 6 zeigt als Ausschnitt aus einer weiteren Ausführungsvariante eines nicht erfindungsgemäßen Auslegerarmsystems drei benachbarte Auslegerarme in der Einfaltstellung im Querschnitt mit Rohrhalterungen. Figure 6 shows, as an excerpt from a further embodiment of a cantilever arm system not according to the invention, three adjacent cantilever arms in the folded-in position in cross section with pipe holders.
  • Figur 7 zeigt den Auslegerarm der Figur 5 in Schnittdarstellung mit einem erfindungsgemäß in dessen Aussparung aufgenommenen weiteren Auslegerarm, dessen Rohrhalterung durch eine Nut ragt. Figure 7 shows the boom of the Figure 5 in a sectional view with a further cantilever arm, which according to the invention is received in its recess and whose pipe holder protrudes through a groove.
  • Figur 8 zeigt die Situation der Figur 7 in seitlicher Ansicht in Sichtrichtung des Pfeiles P. Figure 8 shows the situation of the Figure 7 in a side view in the direction of arrow P.
Ausführliche BeschreibungDetailed description

Gleiche und ähnliche in den einzelnen Figuren dargestellte Merkmale sind mit gleichen Bezugszeichen bezeichnet.Identical and similar features shown in the individual figures are denoted by the same reference symbols.

Figur 1 zeigt als Ausschnitt aus einem nicht erfindungsgemäßen Auslegerarmsystem 10 zwei benachbarte Auslegerarme A1, A2 in der Einfaltstellung im Querschnitt. Unter "benachbart" im vorliegenden Kontext sind zwei Auslegerarme zu verstehen, die in der Einfaltstellung des Auslegers so zueinander zu liegen kommen, dass sie zumindest abschnittsweise parallel zueinander übereinander liegend verlaufen und so unter Ausnutzung des Erfindungsgedankens einer der Arme in eine Aussparung des anderen Arms eingreifen kann. Dies bedeutet nicht zwangsweise, dass die beiden betreffenden Auslegerarme direkt aneinander angelenkt sein müssen. Figure 1 shows, as a detail from a cantilever arm system 10 not according to the invention, two adjacent cantilever arms A1, A2 in the folded-in position in cross section. "Adjacent" in the present context are to be understood as two cantilever arms that come to rest in the folded position of the cantilever in such a way that they at least partially run parallel to one another and thus engage one of the arms in a recess of the other arm using the inventive concept can. This does not necessarily mean that the two cantilever arms in question have to be linked directly to one another.

Die beiden Auslegerarme A1, A2 liegen in der dargestellten Einfaltstellung übereinander, wie dies in vielen Einfaltstellungen der Fall ist. Der in der Darstellung der Figur 1 oben liegende Auslegerarm A1 (aufnehmender Auslegerarm) weist einen etwas breiteren Querschnitt auf als der darunter liegende Auslegerarm A2 (aufzunehmender Auslegerarm). Zudem verfügt der obere Auslegerarm A1 über eine Aussparung 12. Die Aussparung 12 erstreckt sich in Längsrichtung entlang des Auslegerarms A1. Die Aussparung 12 erstreckt sich bspw. im wesentlichen über die gesamte Länge des Auslegerarms A1. Die Aussparung 12 kann rinnenförmig ausgebildet sein. Die Aussparung erstreckt sich in der Regel zwischen den Gelenkbereichen des Auslegerarms und lässt die Gelenkbereiche frei.The two cantilever arms A1, A2 lie one above the other in the folded-in position shown, as is the case in many folded-in positions. The one in the representation of the Figure 1 Cantilever arm A1 above (receiving arm) has a slightly wider cross-section than arm A2 underneath (arm to be received). In addition, the upper extension arm A1 has a recess 12. The recess 12 extends in the longitudinal direction along the extension arm A1. The recess 12 extends, for example, essentially over the entire length of the cantilever arm A1. The recess 12 can be designed in the shape of a channel. The recess usually extends between the joint areas of the cantilever arm and leaves the joint areas free.

Die Aussparung 12 ist in dem dargestellten Ausführungsbeispiel an einem Untergurt UG des oberen Auslegerarms A1 gebildet. Bspw. kann die Aussparung 12 durch Verlängern von linken und rechten Seitenflächen S des Auslegerarms A1 gebildet werden. Die Seitenflächen S ragen dabei derart über den Untergurt UG hinaus, dass die dadurch gebildeten Verlängerungen V1 die Aussparung 12 zur Aufnahme des benachbarten Auslegerarms A2 ausbilden. Alternativ können die Verlängerungen V1 und der Auslegerarm A1 auch durch Aneinandersetzen zweier U-Profile gebildet werden. Dem Fachmann erschließen sich mögliche Herstellungsvarianten ohne weiteres.In the exemplary embodiment shown, the recess 12 is formed on a lower chord UG of the upper extension arm A1. For example, the recess 12 can be lengthened are formed by left and right side surfaces S of the cantilever arm A1. The side surfaces S protrude beyond the lower chord UG in such a way that the extensions V1 formed thereby form the recess 12 for receiving the adjacent cantilever arm A2. Alternatively, the extensions V1 and the cantilever arm A1 can also be formed by joining two U-profiles. Possible manufacturing variants are readily apparent to the person skilled in the art.

Die lichte Weite der Aussparung 12, d.h. der Abstand zwischen den beiden Verlängerungen V1, ist etwas breiter als der Querschnitt des unteren Auslegerarms A2, so dass dieser in der Einfaltstellung der Auslegerarme A1, A2 in der Aussparung 12 aufgenommen ist.The inside width of the recess 12, i.e. the distance between the two extensions V1, is slightly wider than the cross section of the lower extension arm A2, so that it is received in the recess 12 when the extension arms A1, A2 are in the folded-in position.

In dem dargestellten Ausführungsbeispiel überragen die Verlängerungen V1 des oberen Auslegerarms A1 die Höhe des unteren Auslegerarms A2 etwa bis zu dessen Hälfte. Der untere Auslegerarm A2 ist somit teilweise in der darüber liegenden Aussparung 12 aufgenommen. Die Dimensionen der Aussparung und der Auslegerarme können jedoch auch so gewählt sein, dass der untere Auslegerarm höhenmäßig im wesentlichen vollständig oder vollständig in der Aussparung aufgenommen ist, wie dies in dem Ausführungsbeispiel der Figur 3 angedeutet ist.In the illustrated embodiment, the extensions V1 of the upper extension arm A1 protrude about up to half of the height of the lower extension arm A2. The lower cantilever arm A2 is thus partially received in the recess 12 above it. The dimensions of the recess and the extension arms can, however, also be selected such that the lower extension arm is received in the recess essentially completely or completely in terms of height, as is the case in the exemplary embodiment of FIG Figure 3 is indicated.

Es ist zu betonen, dass die dargestellte und beschriebene Anordnung auch umkehrbar ist, so dass der untere Auslegerarm eine an seinem Obergurt ausgebildete Aussparung zur Aufnahme des darüber liegenden, im Querschnitt schmaleren Auslegerarms aufweist.It should be emphasized that the arrangement shown and described can also be reversed, so that the lower extension arm has a recess formed on its upper flange for receiving the extension arm located above it, which has a narrower cross-section.

Auch eine Kombination ist möglich, wie sie in dem Ausführungsbeispiel der Figur 2 dargestellt ist. Figur 2 zeigt eine der Darstellung der Figur 1 ähnliche Anordnung mit einem zusätzlichen Auslegerarm A3, der in der Einfaltstellung unterhalb des bislang unteren Auslegerarms A2 zu liegen kommt. An einem Obergurt OG des untersten Auslegerarms A3 ist wie bereits beschrieben eine erfindungsgemäße Aussparung 14 mit Verlängerungen V3 der Seitenflächen S ausgebildet, die zur Aufnahme des darüber liegenden (nun mittleren) Auslegerarms A2 dient. Beide Aussparungen 12, 14 sind so ausgebildet, dass der mittlere Auslegerarm A2 sowohl etwa hälftig in der oberen Aussparung 12 als auch etwa hälftig in der unteren Aussparung 14 zu liegen kommt und somit im wesentlichen vollständig von den Aussparungen umgeben ist. Es sind auch andere Aufteilungen als die dargestellte im wesentlichen hälftige Aufteilung möglich.A combination is also possible, as shown in the exemplary embodiment in FIG Figure 2 is shown. Figure 2 shows one of the representation of the Figure 1 Similar arrangement with an additional extension arm A3, which in the folded-in position comes to lie below the previously lower extension arm A2. As already described, a recess 14 according to the invention with extensions V3 of the side surfaces S is formed on an upper chord OG of the lowermost cantilever arm A3 and serves to accommodate the (now central) cantilever arm A2 located above it. Both recesses 12, 14 are designed so that the middle cantilever arm A2 comes to rest approximately halfway in the upper recess 12 and approximately halfway in the lower recess 14 and is thus essentially completely surrounded by the recesses. Divisions other than the essentially halved division shown are also possible.

Die Figuren 3 und 4 zeigen Darstellungen des Auslegerarmsystems mit Rohrhalterungen R1, R2, R3 an den Auslegerarmen A1, A2 bzw. A3. Die Rohrhalterungen R1, R3 an den Auslegerarmen A1, A3 mit einer Aussparung 12, 14 sind wie an sich üblich an einer Seitenfläche S des betreffenden Auslegerarms angebracht bzw. befestigt. Die Anordnung kann bspw. mittig in Bezug auf die Höhe des Armhohlprofils erfolgen (vgl. Rohrhalterung R1 der Figur 3). Es kann aber auch sinnvoll sein, die Rohrhalterungen und somit die Förderleitungen für den Beton nicht in dem Bereich der biegeneutralen Faser des Profils anzubringen (die biegeneutrale Faser befindet sich in der Mitte des Profils); derartige Anordnungen sind für die Rohrhalterungen R1, R3 in der Figur 4 dargestellt.the Figures 3 and 4 show representations of the cantilever arm system with pipe brackets R1, R2, R3 on the cantilever arms A1, A2 and A3. The pipe holders R1, R3 on the cantilever arms A1, A3 with a recess 12, 14 are attached or fastened, as is customary per se, to a side surface S of the respective cantilever arm. The arrangement can, for example, take place centrally in relation to the height of the hollow arm profile (cf. pipe holder R1 of the Figure 3 ). However, it can also make sense not to attach the pipe supports and thus the conveying lines for the concrete in the area of the bend-neutral fiber of the profile (the bend-neutral fiber is in the middle of the profile); Such arrangements are shown for the pipe holders R1, R3 in FIG.

Die Rohrhalterungen R2 des Auslegerarms A2, der in einer oder beiden der Aussparungen 12, 14 der benachbarten Auslegerarme A1, A3 zu liegen kommt, sind derart positioniert, dass sie aus der Aussparung 12, 14 herausragen. Dies erfolgt bspw. durch Anordnen der Rohrhalterung R2 im Bereich eines Endes bzw. einer Kante 20 des Auslegerarms A2, die außerhalb der betreffenden Aussparung 12 liegt (vgl. Figur 3). Ggf. kann an der Verlängerung V1 des aufnehmenden Auslegerarms A1 eine (nicht näher dargestellte) Nut vorgesehen sein, damit die Rohrhalterung in der Einfaltstellung die Verlängerung nicht beaufschlägt bzw. berührt. Eine Ausgestaltung mit einer derartigen Nut ist nachstehend unter Bezugnahme auf die Figuren 7 und 8 veranschaulicht.The pipe supports R2 of the cantilever arm A2, which is in one or both of the recesses 12, 14 of the adjacent Cantilever arms A1, A3 come to rest are positioned in such a way that they protrude from the recess 12, 14. This is done, for example, by arranging the pipe holder R2 in the area of an end or an edge 20 of the cantilever arm A2, which lies outside the relevant recess 12 (cf. Figure 3 ). If necessary, a groove (not shown in detail) can be provided on the extension V1 of the receiving cantilever arm A1 so that the pipe holder does not act upon or touch the extension in the folded-in position. An embodiment with such a groove is described below with reference to FIG Figures 7 and 8 illustrated.

Alternativ kann die Rohrhalterung - wie in Figur 4 dargestellt und voranstehend bereits erwähnt - etwa mittig an dem Auslegerarm A2 angeordnet sein und so zwischen den beiden Verlängerungen V1, V3 der oberen und unteren Aussparung 12, 14 hindurchragen. Wichtig ist, dass ein Einfalten und Ausfalten der Auslegerarme durch die Anordnung der Rohrhalterungen nicht beeinträchtigt wird.Alternatively, as shown in FIG. 4 and already mentioned above, the pipe holder can be arranged approximately centrally on the extension arm A2 and thus protrude between the two extensions V1, V3 of the upper and lower cutouts 12, 14. It is important that folding in and out of the extension arms is not impaired by the arrangement of the pipe brackets.

Die beschriebenen Verlängerungen an den Hohlprofilen der aufnehmenden Auslegerarme tragen zur Steifigkeit des Auslegerarmaufbaus bei. Die beschriebenen Verlängerungen können zudem (zumindest abschnittsweise) eine stärkere Wanddicke D aufweisen, als die Wanddicke d der Seitenflächen bzw. Seitenwände S der aufnehmenden Auslegerarme A1, A3, wie dies in den Figuren angedeutet ist. Dadurch wird der Steifigkeitsbeitrag der Verlängerungen verbessert. Die Ausbildung stärkerer Wanddicken an den Verlängerungen ist insbesondere bei der Herstellung eines aufnehmenden Auslegerarms durch Aneinanderfügen zweier U-Profile einfach gestaltbar. Variable Wanddicken sind insbesondere bei einer Ausgestaltung mittels CFK gut realisierbar. Figur 5 zeigt als Variante eine Ausgestaltung, bei der ein erster (an das Hohlprofil angrenzender) Abschnitt der Verlängerung im wesentlichen die gleiche Wandstärke d2 aufweist wie die Seitenwand S des Hohlprofils, während ein weiter entfernter zweiter Abschnitt der Verlängerung eine stärkere Wanddicke D2 aufweist. Auch in dieser Ausführungsform weisen die Verlängerungen der Aussparung 14 eine dickere Wandstärke D2 auf als die Wandstärke d2 der Seitenflächen S des Hohlprofils.The extensions described on the hollow profiles of the receiving cantilever arms contribute to the rigidity of the cantilever arm structure. The extensions described can also (at least in sections) have a greater wall thickness D than the wall thickness d of the side surfaces or side walls S of the receiving cantilever arms A1, A3, as is indicated in the figures. This improves the stiffness contribution of the extensions. The formation of greater wall thicknesses on the extensions can be easily designed, especially when producing a receiving cantilever arm, by joining two U-profiles. Variable wall thicknesses can be easily implemented, especially when designed using CFRP. Figure 5 shows as a variant an embodiment in which a first section of the extension (adjoining the hollow profile) has essentially the same wall thickness d2 as the side wall S of the hollow profile, while a more distant second section of the extension has a greater wall thickness D2. In this embodiment too, the extensions of the recess 14 have a thicker wall thickness D2 than the wall thickness d2 of the side surfaces S of the hollow profile.

Figur 6 zeigt eine Variante eines nicht erfindungsgemäßen Auslegerarmsystems mit Rohrhalterungen R1, R2, R3 unter Verwendung des Auslegerarms A2 der Figur 5. Die Variante der Figur 6 umfasst drei Auslegerarme A1, A2, A3 mit sukzessiv kleinerem bzw. schmalerem Querschnitt, derart dass eine Aussparung 12 des ersten Auslegerarms A1 den (in der Einfaltstellung) benachbart liegenden zweiten Auslegerarm A2 im wesentlichen vollständig aufnimmt, und dessen Aussparung 14 wiederum im wesentlichen vollständig den (in der Einfaltstellung) benachbart liegenden dritten Auslegerarm A3 aufnimmt. Die jeweils innenliegenden Auslegerarme A2, A3 ragen lediglich an dem hohlprofilfernen Ende der entsprechenden aufnehmenden Aussparung 12 bzw. 14 so weit über die Aussparung hinaus, dass noch eine an dem Auslegerarm A2, A3 angebrachte Rohrhalterung R2, R3 außerhalb der Aussparung verläuft, wie dies bereits voranstehend erläutert wurde. Figure 6 shows a variant of a cantilever arm system not according to the invention with pipe holders R1, R2, R3 using the cantilever arm A2 of FIG Figure 5 . The variant of the Figure 6 comprises three cantilever arms A1, A2, A3 with successively smaller or narrower cross-sections, such that a recess 12 of the first cantilever arm A1 essentially completely accommodates the second cantilever arm A2, which is adjacent (in the folded-in position), and its recess 14 in turn essentially completely accommodates the (in the folded position) adjacent third boom A3 receives. The inner cantilever arms A2, A3 only protrude at the end of the corresponding receiving recess 12 or 14 remote from the hollow profile so far beyond the recess that a pipe holder R2, R3 attached to the cantilever arm A2, A3 extends outside the recess, as has already been done has been explained above.

Der erste Auslegerarm A1 weist an seinem Hohlprofil eine Seitenwandstärke d1 auf, während die die Aussparung 12 des ersten Auslegerarms A1 bildenden Verlängerungen V1 (durchgehend) eine dickere Wandstärke D1 aufweisen. Die Wandstärkenverhältnisse des zweiten Auslegerarms A2 wurden bereits voranstehend unter Bezug auf Figur 5 beschrieben.The first cantilever arm A1 has a side wall thickness d1 on its hollow profile, while the extensions V1 (continuously) forming the recess 12 of the first cantilever arm A1 have a thicker wall thickness D1. The wall thickness ratios of the second cantilever arm A2 have already been mentioned above with reference to Figure 5 described.

Die Rohrhalterungen R1 und R3 des ersten und des dritten Auslegerarms A1 bzw. A3 sind ähnlich wie in den Ausgestaltungen der Figuren 2 bis 4 an einer Außenseite der Seitenwand der Verlängerung V1 (im Falle des ersten Arms A1) bzw. der Seitenfläche S des Hohlprofils (im Falle des dritten Arms A3) angeordnet. Im Falle des zweiten Arms A2 ist die Rohrhalterung R2 nicht an einer Außenseite der Verlängerung V2 angeordnet, sondern an deren hohlprofilfernen Stirnseite 22. Diese Ausgestaltung ermöglicht eine besonders kompakte Packung/Verschachtelung.The pipe brackets R1 and R3 of the first and third boom arms A1 and A3 are similar to those in the embodiments of FIG Figures 2 to 4 arranged on an outside of the side wall of the extension V1 (in the case of the first arm A1) or the side surface S of the hollow profile (in the case of the third arm A3). In the case of the second arm A2, the pipe holder R2 is not arranged on an outside of the extension V2, but on its end face 22 remote from the hollow profile. This configuration enables particularly compact packing / nesting.

Die Figuren 7 und 8 zeigen eine erfindungsgemäße Ausgestaltung zur Veranschaulichung der beschriebenen Nuten.the Figures 7 and 8 show an embodiment according to the invention to illustrate the grooves described.

Figur 7 zeigt den Auslegerarm A2 der Figur 5 mit in der Aussparung 14 aufgenommenem weiteren Auslegerarm A3 in der Einfaltstellung, und die Figur 8 zeigt den Auslegerarm A2 in seitlicher Ansicht in Blickrichtung des Pfeiles P der Figur 7. Der innenliegende Auslegerarm A3 weist eine Rohrhalterung R3 auf, die an einem (in der Darstellung der Figur 7) unteren Bereich der Seitenwand S des Auslegerarms A3 befestigt ist. Der aufnehmende Auslegerarm A2 weist an seiner Verlängerung V2 und insbesondere an seiner hohlprofilfernen Stirnseite 22 eine Nut (oder Ausnehmung) 24 auf. In der dargestellten Einfaltstellung ragt die Rohrleitung R3 des innenliegenden Auslegerarms R3 wie dargestellt durch die Nut 24. Dadurch wird eine besonders kompakte Anordnung in der Einfaltstellung des Auslegerarmsystems erzielt. Figure 7 shows the cantilever arm A2 of Figure 5 with another extension arm A3 received in the recess 14 in the folded-in position, and the Figure 8 shows the cantilever arm A2 in a side view in the direction of the arrow P of Figure 7 . The inner cantilever arm A3 has a pipe holder R3 which is attached to one (in the illustration of Figure 7 ) the lower area of the side wall S of the boom A3 is attached. The receiving cantilever arm A2 has a groove (or recess) 24 on its extension V2 and in particular on its end face 22 remote from the hollow profile. In the shown folded-in position, the pipeline R3 of the inner extension arm R3 protrudes through the groove 24 as shown. This results in a particularly compact arrangement in the folded-in position of the extension arm system.

Mit der Erfindung kann der Bauraum einer Betonpumpe effektiver genutzt werden, so dass leichtere und steifere Arme konstruiert werden können.With the invention, the installation space of a concrete pump can be used more effectively, so that lighter and stiffer arms can be constructed.

Claims (13)

  1. Boom arm system (10) for a concrete delivery device, which boom arm system is formed from a plurality of boom arms (A1, A2, A3) which are connected pivotably to one another and are in each case designed as a hollow profile and of which at least one boom arm (A1, A3) in longitudinal extent has a recess (12, 14) which is configured in such a manner that, in a folded-in position of the boom arm system (10), said recess accommodates an adjacently arranged boom arm (A2) having a narrower cross section,
    wherein pipe holders (R2, R3) of the boom arm (A2, A3) coming to lie in the folded-in position in the recess (12, 14) are positioned in such a manner that they project out of the recess (12, 14), characterized in that the respective pipe holder (R2, R3) is arranged in such a manner that it comes to lie in the folded-in position at an end of the recess (12, 14) remote from the hollow profile of the respective boom arm.
  2. Boom arm system (10) for a concrete delivery device, which boom arm system is formed from a plurality of boom arms (A1, A2, A3) which are connected pivotably to one another and of which at least one boom arm (A1, A3) in longitudinal extent has a recess (12, 14) which is configured in such a manner that, in a folded-in position of the boom arm system (10), said recess accommodates an adjacently arranged boom arm (A2) having a narrower cross section,
    wherein pipe holders (R2, R3) of the boom arm (A2, A3) coming to lie in the folded-in position in the recess (12, 14) are positioned in such a manner that they project out of the recess (12, 14), characterized in that a side wall of the recess (12, 14) is provided with a groove (24) accommodating the respective pipe holder (R2, R3) in the folded-in position so that the respective pipe holder (R2, R3) in the folded-in position does not act upon or touch the side wall.
  3. Boom arm system (10) according to Claim 1 or 2, in which the recess (14; 12) is formed on an upper chord (OG) or lower chord (UG) of the boom arm (A3; A1).
  4. Boom arm system (10) according to Claim 3, in which, in order to form the recess (12, 14) along the boom arm (A1, A3), side walls (S) of the boom arm (A1, A3) are extended beyond the upper chord (OG) or the lower chord (UG) .
  5. Boom arm system (10) according to Claim 3, in which the recess (12, 14) is formed by a shaping of the upper chord (OG) or lower chord (UG).
  6. Boom arm system (10) according to one of Claims 1 to 5, in which the recess (12, 14) extends substantially over a length of the boom arm (A1, A3).
  7. Boom arm system (10) according to one of Claims 1 to 6, in which the recess (12, 14) substantially completely accommodates the adjacent boom arm (A2).
  8. Boom arm system (10) according to one of Claims 1 to 6, in which the recess (12, 14) partially accommodates the adjacent boom arm (A2).
  9. Boom arm system (10) according to Claim 8, in which, in the folded-in position, one boom arm (A2) comes to lie in each case in a first recess (12) of a first adjacent boom arm (A1) and in a second recess (14) of a second adjacent boom arm (A3).
  10. Boom arm system (10) according to Claim 9, in which the boom arm (A2) is substantially completely accommodated by the two recesses (12, 14).
  11. Boom arm system (10) according to one of Claims 1 to 10, in which at least one of the boom arms (A1, A2, A3) is at least partially formed from a composite material, in particular fibre composite material.
  12. Boom arm system (10) according to one of Claims 1 to 11, in which side walls (extensions V1, V3) of the recess (12, 14) have a thicker wall thickness (D) than a wall thickness (d) of side surfaces (S) of the profiles of the boom arms (A1, A3).
  13. Concrete delivery device having a boom arm system (10) according to one of Claims 1 to 12.
EP18711254.5A 2017-03-07 2018-03-06 Boom system having a retracted position which reduces installation space Active EP3592922B1 (en)

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DE102017203705.9A DE102017203705A1 (en) 2017-03-07 2017-03-07 Boom arm system with space-reducing Einfaltstellung
PCT/EP2018/055420 WO2018162453A1 (en) 2017-03-07 2018-03-06 Boom system having a retracted position which reduces installation space

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KR102373012B1 (en) 2022-03-10
US11536042B2 (en) 2022-12-27
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US20200080325A1 (en) 2020-03-12
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KR20190122732A (en) 2019-10-30
DE102017203705A1 (en) 2018-09-13

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