EP3904270B1 - Lifting device and method for extracting a mast or support anchored in a foundation - Google Patents

Lifting device and method for extracting a mast or support anchored in a foundation Download PDF

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Publication number
EP3904270B1
EP3904270B1 EP21165937.0A EP21165937A EP3904270B1 EP 3904270 B1 EP3904270 B1 EP 3904270B1 EP 21165937 A EP21165937 A EP 21165937A EP 3904270 B1 EP3904270 B1 EP 3904270B1
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Prior art keywords
lifting
support
mast
lifting device
guide
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EP21165937.0A
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German (de)
French (fr)
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EP3904270A1 (en
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Manfred Weber
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/36—Load-engaging elements
    • B66F3/38—Load-engaging elements adjustable relative to piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25—Constructional features
    • B66F3/36—Load-engaging elements

Definitions

  • the invention relates to a lifting device.
  • Such lifting devices can be used, for example, to pull out a mast or a support anchored in a foundation.
  • a conventional device provides for a chain to be looped around the mast or post, then the mast or post is extracted by vertical movement of a component of the device.
  • this device can only be used for smaller masts or posts.
  • the device includes a U-shaped bottom plate that is positioned to surround the mast. Hydraulic cylinders are supported on the floor surface, the pistons of which are each provided with an adhesive shell, the adhesive shells resting laterally on the mast. By extending the pistons of the hydraulic cylinders, the mast is lifted out of the ground.
  • a lifting device for certain applications, for example for the dismantling of a gantry support, a cable car support or a bridge anchorage, a device is required which is able to pull out large and heavy masts or supports. So far, cranes have been used in most cases for this purpose. Supports of gantries often have so-called shear lugs, with which they are anchored in a foundation. Forces of the order of 100 t can occur when props with shear lugs are pulled out. When pulling out the support with a crane, it is often difficult to remove the support or pull out the mast with the required precision, which may result in damage to the foundation of the support or the mast.
  • a lifting device according to the preamble of claim 1 is from document U.S. 2004/146387 A1 known.
  • a device which is also suitable for extracting large and heavy poles or supports anchored in a foundation.
  • a device is provided with the following features: a lifting cylinder having a piston, a vertically movable claw fixedly connected to the piston of the lifting cylinder, which can be positioned below an object to be lifted, a fixedly connected to the piston of the lifting cylinder, with respect to the direction of movement of the piston arranged oblique guide for a support element, which can be placed with a contact surface on the side of the object to be lifted, and an actuating element to move the support element along the guide.
  • the device according to the invention makes it possible to lift a large and heavy object such as a support or a mast in a controlled manner and to pull it out of an anchorage.
  • the lifting device according to the invention is positioned with its claw under the object to be lifted.
  • the device according to the invention further comprises a support element which, with respect to the direction of movement of the piston, i. H. with respect to the vertical direction.
  • the support element has a contact surface that can be placed laterally on the object to be lifted.
  • the object to be lifted is laterally supported by the contact surface.
  • This also supports the device according to the invention itself in order to prevent it from tipping towards the object to be lifted due to the off-centre introduction of force.
  • the lifting device according to the invention also includes an actuating element in order to displace the support element along the guide. In this way, the contact surface can be individually adapted to the diameter and the outer contour of the object to be lifted and pulled out.
  • the claw is guided in a carriage connected to the lifting cylinder and along the Slide is movable.
  • the claw is a separate component that can be replaced if necessary. In this way, the claw can be adapted to the shape and outer contour of the object to be lifted.
  • the claw preferably has an angled end section which forms a support for the object to be lifted. Accordingly, the claw can be positioned under an edge or a bottom plate of the object to be lifted and then lift the object.
  • the claw is made from a highly tempered steel, preferably from the material 42CrMo5. This material is characterized by high strength and toughness. As a result, the claw can be built particularly narrow, so that it can also be used in confined spaces.
  • a preferred variant of the invention provides that a plate is arranged on the upper side of the lifting cylinder, which is firmly connected to the guide for the support element and the carriage.
  • the plate, guide and carriage enclose a triangular space.
  • the actuating element for displacing the support element along the guide is designed as a hand wheel or as an electric motor.
  • the support element is displaced along the guide by means of the actuating element until it bears against the outside of the object to be lifted.
  • the support element facilitates a smooth, vertical lifting of the mast or support.
  • the contact surface of the support element can consist of a plastic material.
  • the contact surface is preferably made of polyamide (PA).
  • the lifting cylinder can be actuated either manually or by means of an electric hydraulic unit or a hydraulic unit driven by an internal combustion engine.
  • the invention relates to an arrangement comprising several, preferably two or four lifting devices of the type described with a central control device for separately controlling the pistons of the lifting cylinders.
  • a lifting device according to the invention is suitable for manually lifting an object.
  • Several such lifting devices can be controlled in a coordinated manner by means of the optionally available central control device.
  • the invention also relates to a method for extracting a mast or a support anchored to a foundation.
  • the method according to the invention comprises the following steps: arranging at least two lifting devices of the type described on opposite sides of the mast or support so that the claws are below a bottom plate of the mast or support, sliding the support elements of the lifting devices along the guides until the contact surfaces abut the side of the mast or support, extending the pistons of the lifting cylinders to raise the mast or support, and lifting the mast or support with a hoist such as a crane.
  • the lifting device shown comprises a lifting cylinder 1 which has a piston 2 .
  • the lifting cylinder 1 is accommodated in a box-shaped receptacle 3 .
  • a horizontal plate 4 is fixed.
  • a vertically arranged carriage 5 is firmly connected to the plate 4 .
  • the carriage 5 has a rectangular cross section which surrounds a free space into which a claw 6 is inserted from the underside.
  • the claw is made of highly tempered 42CrMo5 steel, which is extremely strong and tough.
  • the claw 6 is connected to the carriage 5 via two transverse bolts (not shown), which pass through the through-holes 7 , 8 of the carriage 5 .
  • the claw 6 comprises a first section 9 accommodated in the carriage 5 and a second, outer, angled section 10.
  • the two sections 9, 10 form at least approximately a right angle.
  • the outer section 10 of the claw 6 is used to lift the respective object.
  • a guide 11 for a support element 13 is also firmly connected to the plate 4.
  • the plate 4, the carriage 5 and the guide 11 enclose a triangular free space 12.
  • the guide 11 has a rectangular cross section.
  • Inside the guide 11 is the support element 13 which can be displaced along the guide 11 .
  • the displacement takes place by means of an actuating element, which is designed as a handwheel 14 in this exemplary embodiment.
  • the hand wheel 14 is coupled to a threaded rod 15 which is engaged with a nut 22 .
  • the nut 22 is located at one end of the support member 13 which is movable along the guide 11.
  • the support element 13 By turning the hand wheel 14, the support element 13 can be displaced in the longitudinal direction of the guide 11, as a result of which the outer end of the support element 13 can be extended or retracted.
  • a contact surface 16 made of a plastic material.
  • the contact surface 16 is made of polyamide (PA).
  • PA polyamide
  • the contact surface 16 is accommodated in a holder made of steel, which is connected in an articulated manner to the support element 13 via a joint 17 .
  • the support element 13 is extended by means of the handwheel 14 until its contact surface 16 rests against the mast or support to be lifted. Due to the articulated mounting of the contact surface 16, it lies flat against the outside of the object to be lifted.
  • the box-shaped receptacle 3 is additionally reinforced by a front panel 18 and diagonal side panels 19 .
  • Each lifting device is positioned so that the claw 6 is located with its outer portion 10 below the object to be lifted.
  • the outer section 10 of the claw 6 is positioned below a base plate 20 of a mast 21 . It may be necessary to remove the synthetic resin concrete or epoxy resin concrete below the base plate 20 so that the claw 6 can engage in the resulting gap. Then the mast 21 to be lifted can be lifted by means of the claw 6 acting on the base plate 20 .
  • a total of four lifting devices are used to lift the object in this exemplary embodiment, with two lifting devices each being positioned next to one another on opposite sides.
  • the handwheel 14 By turning the handwheel 14, the support element 13 is moved out of the guide 11 until its contact surface 16 is in contact with the outside of the mast 21.
  • the piston 2 of the lifting cylinder 1 can be extended in a manner known per se by pumping movements of a rod (not shown).
  • the four lifting devices are operated synchronously or in a controlled manner, so that the mast 21 is raised evenly. This precise lifting of the mast 21 allows it to be detached and lifted from it without major damage to the foundation.
  • conventional methods on the other hand, there is the problem that the shear lugs present on the underside of the mast or the support severely damage the foundation when they are lifted. After lifting and detaching the mast 21 from the foundation, it can be lifted and removed with a crane.
  • lifting devices that are coupled to a hydraulic power pack that generates the hydraulic pressure required for the operation of the lifting devices.
  • the individual lifting devices connected to the hydraulic unit can be controlled separately by means of a corresponding control device.

Description

Die Erfindung betrifft eine Hubvorrichtung.The invention relates to a lifting device.

Derartige Hubvorrichtungen können zum Beispiel zum Herausziehen eines in einem Fundament verankerten Masts oder einer Stütze verwendet werden.Such lifting devices can be used, for example, to pull out a mast or a support anchored in a foundation.

Es sind bereits Vorrichtungen bekannt, um im Boden verankerte Masten oder Pfosten herauszuziehen. Bei einer herkömmlichen Vorrichtung ist beispielsweise vorgesehen, dass um den Mast oder Pfosten eine Kette geschlungen wird, anschließend wird der Mast oder Pfosten durch eine senkrechte Bewegung einer Komponente der Vorrichtung herausgezogen. Diese Vorrichtung ist allerdings nur für kleinere Masten oder Pfosten verwendbar.Devices are already known for extracting masts or posts anchored in the ground. For example, a conventional device provides for a chain to be looped around the mast or post, then the mast or post is extracted by vertical movement of a component of the device. However, this device can only be used for smaller masts or posts.

Aus dem Dokument DD 57 678 A1 ist eine Vorrichtung zum Herausziehen von Masten aus dem Erdboden bekannt. Die Vorrichtung umfasst eine U-förmige Bodenplatte, die so positioniert wird, dass sie den Mast umgibt. Auf der Bodenfläche stützen sich Hydraulikzylinder ab, deren Kolben jeweils mit einer Haftschale versehen sind, wobei die Haftschalen seitlich an dem Mast anliegen. Indem die Kolben der Hydraulikzylinder ausgefahren werden, wird der Mast aus dem Boden herausgehoben.From the document DD 57 678 A1 a device for extracting masts from the ground is known. The device includes a U-shaped bottom plate that is positioned to surround the mast. Hydraulic cylinders are supported on the floor surface, the pistons of which are each provided with an adhesive shell, the adhesive shells resting laterally on the mast. By extending the pistons of the hydraulic cylinders, the mast is lifted out of the ground.

Für bestimmte Anwendungen, beispielsweise für die Demontage einer Stütze einer Schilderbrücke, einer Seilbahnstütze oder einer Brückenverankerung wird eine Vorrichtung benötigt, die in der Lage ist, große und schwere Masten oder Stützen herauszuziehen. Bisher werden dazu in den meisten Fällen Kräne benutzt. Stützen von Schilderbrücken weisen häufig sogenannte Schubknaggen auf, mit denen sie in einem Fundament verankert sind. Beim Herausziehen von Stützen mit Schubknaggen können Kräfte in der Größenordnung von 100 t auftreten. Beim Herausziehen der Stütze mit einem Kran ist es häufig schwierig, die Stütze oder den Mast mit der benötigten Präzision herauszuziehen, sodass es dabei zu Beschädigungen des Fundaments der Stütze oder des Masts kommen kann. Eine Hubvorrichtung gemäß dem Oberbegriff des Anspruchs 1 ist aus dem Dokument US 2004/146387 A1 bekannt.For certain applications, for example for the dismantling of a gantry support, a cable car support or a bridge anchorage, a device is required which is able to pull out large and heavy masts or supports. So far, cranes have been used in most cases for this purpose. Supports of gantries often have so-called shear lugs, with which they are anchored in a foundation. Forces of the order of 100 t can occur when props with shear lugs are pulled out. When pulling out the support with a crane, it is often difficult to remove the support or pull out the mast with the required precision, which may result in damage to the foundation of the support or the mast. A lifting device according to the preamble of claim 1 is from document U.S. 2004/146387 A1 known.

Es besteht daher Bedarf an einer Vorrichtung, die auch zum Herausziehen großer und schwerer in einem Fundament verankerter Masten oder Stützen geeignet ist. Zur Lösung dieser Aufgabe ist eine Vorrichtung mit den folgenden Merkmalen vorgesehen: einen einen Kolben aufweisenden Hubzylinder, eine fest mit dem Kolben des Hubzylinders verbundene, vertikal bewegbare Kralle, die unterhalb eines anzuhebenden Objekts positionierbar ist, eine fest mit dem Kolben des Hubzylinders verbundene, bezüglich der Bewegungsrichtung des Kolbens schräg angeordnete Führung für ein Stützelement, das mit einer Anlagefläche seitlich an das anzuhebende Objekt anlegbar ist, und ein Betätigungselement, um das Stützelement entlang der Führung zu verschieben.There is therefore a need for a device which is also suitable for extracting large and heavy poles or supports anchored in a foundation. To solve this problem, a device is provided with the following features: a lifting cylinder having a piston, a vertically movable claw fixedly connected to the piston of the lifting cylinder, which can be positioned below an object to be lifted, a fixedly connected to the piston of the lifting cylinder, with respect to the direction of movement of the piston arranged oblique guide for a support element, which can be placed with a contact surface on the side of the object to be lifted, and an actuating element to move the support element along the guide.

Die erfindungsgemäße Vorrichtung ermöglicht es, ein großes und schweres Objekt wie eine Stütze oder einen Mast kontrolliert anzuheben und aus einer Verankerung herauszuziehen. Dazu wird die erfindungsgemäße Hubvorrichtung mit ihrer Kralle unter das anzuhebende Objekt positioniert. Die erfindungsgemäße Vorrichtung umfasst ferner ein Stützelement, das bezüglich der Bewegungsrichtung des Kolbens, d. h. bezüglich der Vertikalrichtung, schräg angeordnet ist. Das Stützelement weist eine Anlagefläche auf, die seitlich an das anzuhebende Objekt anlegbar ist. Durch die Anlagefläche wird das anzuhebende Objekt seitlich gestützt. Dadurch wird auch die erfindungsgemäße Vorrichtung selbst gestützt, um zu verhindern, dass sie durch die außermittige Krafteinleitung zu dem anzuhebenden Objekt hin kippt. Die erfindungsgemäße Hubvorrichtung umfasst ferner ein Betätigungselement, um das Stützelement entlang der Führung zu verschieben. Auf diese Weise kann die Anlagefläche individuell an den Durchmesser und die Außenkontur des anzuhebenden herauszuziehenden Objekts angepasst werden.The device according to the invention makes it possible to lift a large and heavy object such as a support or a mast in a controlled manner and to pull it out of an anchorage. For this purpose, the lifting device according to the invention is positioned with its claw under the object to be lifted. The device according to the invention further comprises a support element which, with respect to the direction of movement of the piston, i. H. with respect to the vertical direction. The support element has a contact surface that can be placed laterally on the object to be lifted. The object to be lifted is laterally supported by the contact surface. This also supports the device according to the invention itself in order to prevent it from tipping towards the object to be lifted due to the off-centre introduction of force. The lifting device according to the invention also includes an actuating element in order to displace the support element along the guide. In this way, the contact surface can be individually adapted to the diameter and the outer contour of the object to be lifted and pulled out.

Bei der erfindungsgemäßen Hubvorrichtung wird es bevorzugt, dass die Kralle in einem mit dem Hubzylinder verbundenen Schlitten geführt und entlang des Schlittens bewegbar ist. Die Kralle ist ein separates Bauteil, das bei Bedarf ausgetauscht werden kann. Die Kralle kann auf diese Weise an die Form und Außenkontur des anzuhebenden Objekts angepasst werden.In the lifting device according to the invention, it is preferred that the claw is guided in a carriage connected to the lifting cylinder and along the Slide is movable. The claw is a separate component that can be replaced if necessary. In this way, the claw can be adapted to the shape and outer contour of the object to be lifted.

Vorzugsweise besitzt die Kralle einen eine Auflage für das anzuhebende Objekt bildenden abgewinkelten Endabschnitt. Dementsprechend kann die Kralle unter eine Kante oder eine Bodenplatte des anzuhebenden Objekts positioniert werden und das Objekt anschließend anheben.The claw preferably has an angled end section which forms a support for the object to be lifted. Accordingly, the claw can be positioned under an edge or a bottom plate of the object to be lifted and then lift the object.

Es wird besonders bevorzugt, dass die Kralle aus einem hoch vergüteten Stahl hergestellt ist, vorzugsweise aus dem Werkstoff 42CrMo5. dieser Werkstoff zeichnet sich durch eine hohe Festigkeit und Zähigkeit aus. Dadurch kann die Kralle besonders schmal gebaut werden, sodass sie auch bei beengten Platzverhältnissen einsetzbar ist.It is particularly preferred that the claw is made from a highly tempered steel, preferably from the material 42CrMo5. this material is characterized by high strength and toughness. As a result, the claw can be built particularly narrow, so that it can also be used in confined spaces.

Eine bevorzugte Variante der Erfindung sieht vor, dass auf der Oberseite des Hubzylinders eine Platte angeordnet ist, die fest mit der Führung für das Stützelement und dem Schlitten verbunden ist. Vorzugsweise schließen die Platte, die Führung und der Schlitten einen dreieckigen Freiraum ein.A preferred variant of the invention provides that a plate is arranged on the upper side of the lifting cylinder, which is firmly connected to the guide for the support element and the carriage. Preferably, the plate, guide and carriage enclose a triangular space.

Es liegt auch im Rahmen der Erfindung, dass das Betätigungselement zum Verschieben des Stützelements entlang der Führung als Handrad oder als Elektromotor ausgebildet ist. Mittels des Betätigungselements wird das Stützelement entlang der Führung verschoben, bis es an der Außenseite des anzuhebenden Objekts anliegt. Das Stützelement erleichtert ein gleichmäßiges, vertikales Anheben des Masts oder der Stütze.It is also within the scope of the invention that the actuating element for displacing the support element along the guide is designed as a hand wheel or as an electric motor. The support element is displaced along the guide by means of the actuating element until it bears against the outside of the object to be lifted. The support element facilitates a smooth, vertical lifting of the mast or support.

Die Anlagefläche des Stützelements kann bei der erfindungsgemäßen Hubvorrichtung aus einem Kunststoffmaterial bestehen. Vorzugsweise ist die Anlagefläche aus Polyamid (PA) hergestellt.In the lifting device according to the invention, the contact surface of the support element can consist of a plastic material. The contact surface is preferably made of polyamide (PA).

Der Hubzylinder kann entweder manuell oder mittels eines elektrischen oder durch einen Verbrennungsmotor angetriebenen Hydraulikaggregats betätigbar sein.The lifting cylinder can be actuated either manually or by means of an electric hydraulic unit or a hydraulic unit driven by an internal combustion engine.

Daneben betrifft die Erfindung eine Anordnung, umfassend mehrere, vorzugsweise zwei oder vier Hubvorrichtungen der beschriebenen Art mit einer zentralen Steuerungseinrichtung zum separaten Steuern der Kolben der Hubzylinder. Grundsätzlich ist eine erfindungsgemäße Hubvorrichtung zum manuellen Anheben eines Objekts geeignet. Mittels der optional vorhandenen zentralen Steuerungseinrichtung können mehrere derartige Hubvorrichtungen koordiniert gesteuert werden.In addition, the invention relates to an arrangement comprising several, preferably two or four lifting devices of the type described with a central control device for separately controlling the pistons of the lifting cylinders. In principle, a lifting device according to the invention is suitable for manually lifting an object. Several such lifting devices can be controlled in a coordinated manner by means of the optionally available central control device.

Die Erfindung betrifft darüber hinaus ein Verfahren zum Herausziehen eines an einem Fundament verankerten Masts oder einer Stütze. Das erfindungsgemäße Verfahren umfasst die folgenden Schritte: Anordnen von wenigstens zwei Hubvorrichtungen der beschriebenen Art an entgegengesetzten Seiten des Masts oder der Stütze, so dass die Krallen sich unterhalb einer Bodenplatte des Masts oder der Stütze befinden, Verschieben der Stützelemente der Hubvorrichtungen entlang der Führungen, bis die Anlageflächen seitlich an dem Mast oder der Stütze anliegen, Ausfahren der Kolben der Hubzylinder, um den Mast oder die Stütze anzuheben, und Anheben des Masts oder der Stütze mit einem Hebezeug wie einem Kran.The invention also relates to a method for extracting a mast or a support anchored to a foundation. The method according to the invention comprises the following steps: arranging at least two lifting devices of the type described on opposite sides of the mast or support so that the claws are below a bottom plate of the mast or support, sliding the support elements of the lifting devices along the guides until the contact surfaces abut the side of the mast or support, extending the pistons of the lifting cylinders to raise the mast or support, and lifting the mast or support with a hoist such as a crane.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnungen erläutert. Die Zeichnungen sind schematische Darstellungen und zeigen:

Fig. 1
eine erfindungsgemäße Hubvorrichtung in einer Seitenansicht,
Fig. 2
die in Fig. 1 gezeigte Hubvorrichtung in einer Vorderansicht,
Fig. 3
eine ähnliche Ansicht wie Fig. 1, bei der die Vorrichtung an einem anzuhebenden Objekt positioniert ist, und
Fig. 4
die Hubvorrichtung beim Anheben eines Objekts.
The invention is explained below using an exemplary embodiment with reference to the drawings. The drawings are schematic representations and show:
1
a lifting device according to the invention in a side view,
2
in the 1 lifting device shown in a front view,
3
a similar view as 1 , in which the device is positioned on an object to be lifted, and
4
the lifting device when lifting an object.

Die in Fig. 1 gezeigte Hubvorrichtung umfasst einen Hubzylinder 1, der einen Kolben 2 aufweist. Der Hubzylinder 1 ist in einer kastenförmigen Aufnahme 3 aufgenommen. Am freien Ende des Kolbens 2 ist eine horizontale Platte 4 fest angebracht.In the 1 The lifting device shown comprises a lifting cylinder 1 which has a piston 2 . The lifting cylinder 1 is accommodated in a box-shaped receptacle 3 . At the free end of the piston 2, a horizontal plate 4 is fixed.

Ein vertikal angeordneter Schlitten 5 ist fest mit der Platte 4 verbunden. Der Schlitten 5 weist in diesem Ausführungsbeispiel einen rechteckigen Querschnitt auf, der einen Freiraum umgibt, in den von der Unterseite her eine Kralle 6 eingesetzt ist. Die Kralle ist aus dem hoch vergüteten Stahl 42CrMo5 hergestellt, der eine hohe Festigkeit und Zähigkeit aufweist. Über zwei Querbolzen (nicht dargestellt), die Durchgangslöcher 7, 8 des Schlittens 5 durchsetzen, ist die Kralle 6 mit dem Schlitten 5 verbunden. Die Kralle 6 umfasst einen ersten, in dem Schlitten 5 aufgenommenen Abschnitt 9 und einen zweiten, äußeren, abgewinkelten Abschnitt 10. Die beiden Abschnitte 9, 10 bilden zumindest näherungsweise einen rechten Winkel. Der äußere Abschnitt 10 der Kralle 6 dient zum Anheben des jeweiligen Objekts.A vertically arranged carriage 5 is firmly connected to the plate 4 . In this exemplary embodiment, the carriage 5 has a rectangular cross section which surrounds a free space into which a claw 6 is inserted from the underside. The claw is made of highly tempered 42CrMo5 steel, which is extremely strong and tough. The claw 6 is connected to the carriage 5 via two transverse bolts (not shown), which pass through the through-holes 7 , 8 of the carriage 5 . The claw 6 comprises a first section 9 accommodated in the carriage 5 and a second, outer, angled section 10. The two sections 9, 10 form at least approximately a right angle. The outer section 10 of the claw 6 is used to lift the respective object.

Neben dem Schlitten 5 ist auch eine Führung 11 für ein Stützelement 13 fest mit der Platte 4 verbunden. Die Platte 4, der Schlitten 5 und die Führung 11 schließen einen dreieckigen Freiraum 12 ein. In Fig. 2 erkennt man, dass die Führung 11 einen rechteckigen Querschnitt aufweist. Im Inneren der Führung 11 befindet sich das Stützelement 13, das entlang der Führung 11 verschiebbar ist. Die Verschiebung erfolgt mittels eines Betätigungselements, das in diesem Ausführungsbeispiel als Handrad 14 ausgebildet ist. Das Handrad 14 ist mit einer Gewindestange 15 gekoppelt, die mit einer Mutter 22 im Eingriff ist. Die Mutter 22 befindet sich an einem Ende des Stützelements 13, das entlang der Führung 11 bewegbar ist. Durch Drehen des Handrads 14 kann das Stützelement 13 in Längsrichtung der Führung 11 verschoben werden, wodurch das äußere Ende des Stützelements 13 aus- oder eingefahren werden kann. An dem freien Ende des Stützelements 13 befindet sich eine aus einem Kunststoffmaterial hergestellte Anlagefläche 16. In dem dargestellten Ausführungsbeispiel ist die Anlagefläche 16 aus Polyamid (PA) hergestellt. Die Anlagefläche 16 ist in einer aus Stahl hergestellten Halterung aufgenommen, die über ein Gelenk 17 gelenkig mit dem Stützelement 13 verbunden ist. Beim Betrieb der Hubvorrichtung wird das Stützelement 13 mittels des Handrads 14 so weit ausgefahren, bis es mit seiner Anlagefläche 16 an dem anzuhebenden Mast oder der Stütze anliegt. Aufgrund der gelenkigen Lagerung der Anlagefläche 16 legt sie sich flächig an die Außenseite des anzuhebenden Objekts an.In addition to the carriage 5, a guide 11 for a support element 13 is also firmly connected to the plate 4. The plate 4, the carriage 5 and the guide 11 enclose a triangular free space 12. In 2 it can be seen that the guide 11 has a rectangular cross section. Inside the guide 11 is the support element 13 which can be displaced along the guide 11 . The displacement takes place by means of an actuating element, which is designed as a handwheel 14 in this exemplary embodiment. The hand wheel 14 is coupled to a threaded rod 15 which is engaged with a nut 22 . The nut 22 is located at one end of the support member 13 which is movable along the guide 11. By turning the hand wheel 14, the support element 13 can be displaced in the longitudinal direction of the guide 11, as a result of which the outer end of the support element 13 can be extended or retracted. At the free end of the support element 13 there is a contact surface 16 made of a plastic material. In the exemplary embodiment shown, the contact surface 16 is made of polyamide (PA). The contact surface 16 is accommodated in a holder made of steel, which is connected in an articulated manner to the support element 13 via a joint 17 . During operation of the lifting device, the support element 13 is extended by means of the handwheel 14 until its contact surface 16 rests against the mast or support to be lifted. Due to the articulated mounting of the contact surface 16, it lies flat against the outside of the object to be lifted.

Die kastenförmige Aufnahme 3 ist durch eine Frontplatte 18 und diagonale Seitenplatten 19 zusätzlich verstärkt.The box-shaped receptacle 3 is additionally reinforced by a front panel 18 and diagonal side panels 19 .

Zum Anheben eines Objekts werden mehrere Hubvorrichtungen der beschriebenen Art verwendet. Jede Hubvorrichtung wird so positioniert, dass sich die Kralle 6 mit ihrem äußeren Abschnitt 10 unterhalb des anzuhebenden Objekts befindet. In Fig. 3 ist dargestellt, dass der äußere Abschnitt 10 der Kralle 6 unterhalb einer Bodenplatte 20 eines Masts 21 positioniert wird. Gegebenenfalls ist es dazu erforderlich, den Kunstharzbeton oder Epoxidharzbeton unterhalb der Bodenplatte 20 zu entfernen, damit die Kralle 6 in den dadurch entstandenen Zwischenraum eingreifen kann. Anschließend kann der anzuhebende Mast 21 mittels der an der Bodenplatte 20 angreifenden Kralle 6 angehoben werden.Several lifting devices of the type described are used to lift an object. Each lifting device is positioned so that the claw 6 is located with its outer portion 10 below the object to be lifted. In 3 it is shown that the outer section 10 of the claw 6 is positioned below a base plate 20 of a mast 21 . It may be necessary to remove the synthetic resin concrete or epoxy resin concrete below the base plate 20 so that the claw 6 can engage in the resulting gap. Then the mast 21 to be lifted can be lifted by means of the claw 6 acting on the base plate 20 .

Insgesamt werden zum Anheben des Objekts in diesem Ausführungsbeispiel vier Hubvorrichtungen verwendet, wobei jeweils zwei Hubvorrichtungen nebeneinander an gegenüberliegenden Seiten positioniert werden. Durch Drehen des Handrads 14 wird das Stützelement 13 aus der Führung 11 ausgefahren, bis dessen Anlagefläche 16 an der Außenseite des Masts 21 anliegt.A total of four lifting devices are used to lift the object in this exemplary embodiment, with two lifting devices each being positioned next to one another on opposite sides. By turning the handwheel 14, the support element 13 is moved out of the guide 11 until its contact surface 16 is in contact with the outside of the mast 21.

Durch Pumpbewegungen einer nicht dargestellten Stange kann der Kolben 2 des Hubzylinders 1 in an sich bekannter Weise ausgefahren werden. Die insgesamt vier Hubvorrichtungen werden dabei synchron bzw. kontrolliert betätigt, sodass der Mast 21 gleichmäßig angehoben wird. Durch dieses präzise Anheben des Masts 21 kann dieser ohne größere Beschädigungen des Fundaments davon gelöst und angehoben werden. Bei herkömmlichen Verfahren besteht hingegen das Problem, dass die an der Unterseite des Masts oder der Stütze vorhandenen Schubknaggen beim Anheben das Fundament stark beschädigen. Nach dem Anheben und Lösen des Masts 21 von dem Fundament kann er mit einem Kran angehoben und entfernt werden.The piston 2 of the lifting cylinder 1 can be extended in a manner known per se by pumping movements of a rod (not shown). The four lifting devices are operated synchronously or in a controlled manner, so that the mast 21 is raised evenly. This precise lifting of the mast 21 allows it to be detached and lifted from it without major damage to the foundation. With conventional methods, on the other hand, there is the problem that the shear lugs present on the underside of the mast or the support severely damage the foundation when they are lifted. After lifting and detaching the mast 21 from the foundation, it can be lifted and removed with a crane.

Es ist auch möglich, Hubvorrichtungen zu verwenden, die mit einem Hydraulikaggregat gekoppelt sind, das den für den Betrieb der Hubvorrichtungen benötigten hydraulischen Druck erzeugt. Mittels einer entsprechenden Steuerungseinrichtung können die einzelnen, mit dem Hydraulikaggregat verbundenen Hubvorrichtungen separat gesteuert werden.It is also possible to use lifting devices that are coupled to a hydraulic power pack that generates the hydraulic pressure required for the operation of the lifting devices. The individual lifting devices connected to the hydraulic unit can be controlled separately by means of a corresponding control device.

BezugszeichenlisteReference List

11
Hubzylinderlifting cylinder
22
KolbenPistons
33
AufnahmeRecording
44
Platteplate
55
SchlittenSleds
66
Kralleclaw
77
Durchgangslochthrough hole
88th
Durchgangslochthrough hole
99
AbschnittSection
1010
AbschnittSection
1111
Führungguide
1212
Freiraumfree space
1313
Stützelementsupport element
1414
Handradhandwheel
1515
Gewindestangethreaded rod
1616
Anlageflächecontact surface
1717
Gelenkjoint
1818
Frontplattefront panel
1919
Seitenplatteside plate
2020
Bodenplattebottom plate
2121
Mastmast
2222
MutterMother

Claims (11)

  1. Lifting device, comprising:
    - a lifting cylinder (1) having a piston (2),
    - a vertically movable claw (6), which is fixedly connected to the piston (2) of the lifting cylinder (1) and can be positioned below an object to be lifted,
    - characterized by
    - a guide (11), which is connected to the piston (2) of the lifting cylinder (1) and is arranged obliquely with respect to the direction of movement of the piston (2), for a supporting element (13) which can be placed with a contact surface (16) laterally against the object to be lifted, and
    - an actuating element to displace the support element (13) along the guide (11).
  2. The lifting device according to claim 1, wherein the claw (6) is guided in a carriage (5) connected to the lifting cylinder (1) and is movable along the carriage (5).
  3. The lifting device according to claim 1 or 2, wherein the claw (6) has an angled end portion (10) forming a support for the object to be lifted.
  4. The lifting device according to one of the preceding claims, wherein the claw (6) is made of a highly quenched and tempered steel, preferably of the material 42CrMo5.
  5. The lifting device according to one of the claims 2 to 4, wherein a plate (4) is arranged on the upper side of the lifting cylinder (1), which plate is firmly connected to the guide (11) for the support element (13) and the carriage (5).
  6. The lifting device according to claim 5, wherein the plate (4), the guide (11) and the carriage (5) enclose a triangular free space.
  7. The lifting device according to one of the preceding claims, wherein the actuating element for displacing the support element (13) along the guide (11) is designed as a handwheel (14) or as an electric motor.
  8. The lifting device according to one of the preceding claims, wherein the contact surface (16) of the support element (13) consists of a plastic material, preferably polyamide (PA).
  9. The lifting device according to one of the preceding claims, wherein the lifting cylinder (1) can be actuated manually or by means of a hydraulic unit driven electrically or by an internal combustion engine.
  10. Arrangement comprising several, preferably two or four lifting devices according to any one of claims 1 to 9, with a central control device for separately controlling the pistons (2) of the lifting cylinders (1).
  11. A method of extracting a mast (21) or support anchored in a foundation, comprising the following steps:
    - arranging at least two lifting devices according to any one of claims 1 to 9 on opposite sides of the mast (21) or the support so that the claws (6) are located below a bottom plate of the mast (21) or the support,
    - shifting the support elements (13) of the lifting devices along the guides (11) until the contact surfaces (16) rest laterally against the mast (21) or the support,
    - extending the pistons (2) of the lifting cylinders (1) to raise the mast (21) or the support, and
    - lifting the mast (21) or the support with a hoist such as a crane.
EP21165937.0A 2020-04-15 2021-03-30 Lifting device and method for extracting a mast or support anchored in a foundation Active EP3904270B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020110308.5A DE102020110308A1 (en) 2020-04-15 2020-04-15 Lifting device and method for pulling out a mast or support anchored in a foundation

Publications (2)

Publication Number Publication Date
EP3904270A1 EP3904270A1 (en) 2021-11-03
EP3904270B1 true EP3904270B1 (en) 2023-02-08

Family

ID=75302341

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Application Number Title Priority Date Filing Date
EP21165937.0A Active EP3904270B1 (en) 2020-04-15 2021-03-30 Lifting device and method for extracting a mast or support anchored in a foundation

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EP (1) EP3904270B1 (en)
DE (2) DE102020110308A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD57678A (en)
US4354795A (en) 1981-02-13 1982-10-19 Dutra Jr Joseph G Load stabilizer assembly with pivotal mount for a forklift truck
DD262220B3 (en) 1987-06-29 1993-04-22 Joachim Thieme LIFTING DEVICE FOR LOWEST LOADS
US4822006A (en) 1987-07-31 1989-04-18 Mcintire Gary L Pole pulling apparatus and method
US6817827B2 (en) * 2003-01-23 2004-11-16 Frank Targonski Lifting apparatus with stabilizer
US20120153245A1 (en) * 2010-12-20 2012-06-21 Zloch David A Furniture lifting device

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DE202021103797U1 (en) 2021-08-03
EP3904270A1 (en) 2021-11-03
DE102020110308A1 (en) 2021-10-21

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