EP0703184A1 - Shaft ring gripper - Google Patents

Shaft ring gripper Download PDF

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Publication number
EP0703184A1
EP0703184A1 EP95110806A EP95110806A EP0703184A1 EP 0703184 A1 EP0703184 A1 EP 0703184A1 EP 95110806 A EP95110806 A EP 95110806A EP 95110806 A EP95110806 A EP 95110806A EP 0703184 A1 EP0703184 A1 EP 0703184A1
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EP
European Patent Office
Prior art keywords
group
clamping
jaws
clamping jaws
support frame
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EP95110806A
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German (de)
French (fr)
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EP0703184B1 (en
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Florian Schmölz
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/44—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces
    • B66C1/54—Internally-expanding grippers for handling hollow articles
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • E02D29/1445—Tools for positioning or removing cover frames

Definitions

  • the invention relates to a shaft ring gripper with a support frame which has a first group of three clamping jaws lying at an angular distance of 120 ° to one another in a horizontal plane.
  • Manhole ring grippers of this type use chain-like pliers-like clamping devices, each with two clamping jaws, which rest on the inside and outside of the pipe wall and clamp the pipe wall between them when the support frame is lifted. It is disadvantageous that the operator of the device has to leave the control station in order to position the clamping jaws. Another disadvantage is that shaft rings can be transported and displaced in the vertical position, but not so-called cones, which taper upwards from the shaft ring diameter to the manhole cover diameter. Such cones have the shape of an oblique truncated cone because the shell must run perpendicular to a surface line, where stirrups are attached for accessing the shaft.
  • Such a cone for a shaft pipe width of 1000 mm has a manhole cover opening of 600 mm. If such cones are gripped by the manhole gripper at the manhole cover opening, they hang askew because of the eccentric center of gravity, which is why placing a cone on a manhole is problematic.
  • the object of the invention is to provide a manhole ring gripper that can be operated by an operator only from the control station of the device and with which not only manhole rings, but also the associated cones can be moved without problems, without having to make adjustments to the manhole ring gripper.
  • the support frame has three at least approximately radially directed guide bodies at the same distance from a vertical central axis of the support frame, in each of which a clamping member equipped with a clamping jaw, preferably a slide, is movably mounted that the support frame is a, has coaxial guide member to the central axis, in which a tension element is guided axially displaceably, that the tension element is connected to an axial-radial displacement converter, which in turn is connected to the slides in such a way that the jaws are moved synchronously radially when the tension element is axially displaced relative to the guide element, that at the upper end of the pulling element there is provided a suspension means for a load lifter, that a second group of three displaceable clamping jaws is provided on the supporting frame in a parallel plane lying below the horizontal plane of the first group of clamping jaws, the clamping plane of which cken on a smaller diameter than that of the first group, that the suspension means has a first coaxial suspension position for the load
  • the manhole ring gripper works with a new clamping principle in which the clamping jaws are moved radially outwards when the support frame is lifted until it rests against the inner surface of the chess ring.
  • the weight of the shaft ring is converted with high efficiency into the radially outward clamping forces.
  • With the three clamping jaws on the inside of the manhole ring it can be securely picked up, transported and moved.
  • the load-bearing frame is relieved.
  • the tension element moves the jaws radially inwards into an inoperative position.
  • the clamping elements can also consist of swivel levers instead of linearly movable slides.
  • the suspension means must be brought into the second suspension position, which may or may not require manual adjustment by the operator. It is namely within the scope of the invention to shift the suspension means from the first suspension position into the second suspension position by lowering, pivoting and lifting again without the operator having to leave the control position.
  • the distance between the two suspension positions corresponds to the eccentricity of the center of gravity of a shaft cone from the axis of the manhole cover opening.
  • Both groups of clamping jaws can have their own axial radial displacement converters, which, for. B. can work on the wedge principle, the toggle principle or a combination of these principles.
  • Two jaws of both jaw groups are preferably arranged in an axial plane and rigidly connected to each other, so that an axial-radial displacement converter is sufficient for this pair of jaws.
  • a further development of the invention is that the tension element protrudes from the guide element on the bottom side and at its end lying below the horizontal plane of the first group of clamping jaws, three links are pivotally mounted, which extend obliquely upward to one of the sliders and fastened to this or to it Connection piece are articulated.
  • the loaded tension element must be relieved in order to be able to release the clamping jaws from the shaft ring.
  • support plates are provided above the radial planes of the two jaw groups, which protrude radially outwards from their respective associated jaws. These support plates provided on the support frame then serve to support the support frame on the shaft ring.
  • the suspension means is lowered further, for example a crane hook, the weight of the tension element ensures that the jaws are released.
  • the guide bodies for the slides of the jaws of the first group are used for the lower second group of clamping jaws, while three additional radial support irons are welded to the support frame for the clamping jaws of the first group.
  • the sliding directions of the slides in the guide bodies extend slightly outwards with respect to the horizontal plane at a small angle.
  • the clamping jaws are pivotally mounted on their slides or the connecting pieces attached to them and are preloaded in terms of weight or spring, in which they rest against a stop.
  • the coupling device can include an automatic system which ensures that the successive lowering movements of the tension element in the guide element alternately unlock and lock. This can be achieved, for example, by means of a swivel pawl on the guide member of the support frame, which is supported in the coupling position on a stop of the tension element, so that the tension element and the support frame are coupled for common movement and which can be pivoted into an unlocking position in order to decouple the tension element from the guide element .
  • the suspension means has a vertical plate with a slot arrangement, that a hook adjacent to the plate or two hooks on both sides of the plate protrude upward on the guide element, which form the coupling device and engage in the contour of the slot arrangement, and that the load lifter has a support bolt movable in the slot arrangement.
  • the operator therefore only needs to lower the support bolt, then pivot it slightly away in the slot arrangement of the plate under the hook and then pull it up again, the bolt automatically reaching the coaxial suspension position in the slot arrangement.
  • a particularly advantageous development consists in the fact that the slot arrangement has an essentially V-shaped curved or angled slot path, the upper ends of which form the two suspension positions for the two unlocking positions, specifically for shaft ring and shaft cone operation.
  • the operator can thus move the support bolt from the control position from one suspension position to the other if he has to transport a shaft cone instead of a shaft ring and vice versa.
  • the distance between the two suspension positions is in the range from 40% to 60% of half the diameter of the clamping jaws of the second lower group and is preferably about 50% of that measure.
  • the center of gravity of the shaft cone is then at least approximately below this second suspension position, which is offset from the coaxial suspension position.
  • the manhole ring gripper 10 has a support frame 12 which consists of a horizontal triangular frame 14 which carries a vertical guide tube 18 by means of radial struts 16.
  • An approximately radially directed guide bushing 20 is welded to each of the three corners of the triangular frame 14, from which a diagonal strut 22 extends obliquely upward inwards to the guide tube 18.
  • a rod-shaped slide 22 is slidably mounted in each guide bush 20, slidably mounted. The sliding direction of the slide 22 extends slightly upwards in an axial plane at a small angle.
  • Each of the three slides 22 carries at its front end a clamping jaw 24, the clamping surface of which is convexly curved and toothed to improve the holding function.
  • the jaw 24 is pivotally mounted in its lower half on the slide 22 and has a weight arm 26 projecting towards the rear, for which the guide bush 20 forms a stop.
  • the jaw 24 can thus pivot clockwise (FIG. 1) to reinforce the clamping engagement.
  • a pull rod 28 is guided to be vertically displaceable.
  • the pull rod 28 protrudes from the guide tube 18 on both sides, is slotted at its upper end and welded to a vertical plate 30 inserted into the slot.
  • a flange 32 is screwed, on which three links 34 are pivotally mounted, which extend inclined radially outwards and are pivotably mounted on a connecting plate 36, which in turn is welded to the rear end of the respective slide 22 is.
  • the connecting plate 36 extends downward from the slide 22 and serves at the lower end for the pivotable mounting of a further clamping jaw 38, which corresponds to the clamping jaw 24 and also has a rear weight arm, around the clamping jaw 38 in a starting position in contact with the end wall of the connecting plate 36 to keep.
  • the support frame 12 thus has a first group of three clamping jaws 24, which lie in a horizontal plane, and a second group of three clamping jaws 38, which are arranged in a parallel plane lying below this horizontal plane and have a diameter which is approximately 60% of the diameter of the first group of clamping jaws 24 is.
  • the vertical plate 30 at the upper end of the pull rod 28 has a slot arrangement 40, which consists of an angled, approximately V-shaped slot track 42 and a track extension 44 starting from its right track branch.
  • a support pin 46 is guided in the slot arrangement 40 and is fastened to a fork 48 of a hydraulic lifter.
  • the upper end of the right-hand path branch of the slot path 42 forms a first coaxial suspension position 50 for the supporting bolt 46.
  • a second suspension position 52 is formed at the upper end of the slot path 42 at the upper end thereof, which is approximately the same horizontal distance from the first suspension position 50 has half the center distance of the lower clamping jaws 38 from the central axis of the shaft ring gripper 10, designated 54.
  • the web extension 44 runs approximately parallel to the left web section of the slot web 42, but offset to this up to a vertical plane, which the support pin 46 in the position shown in FIG. 1 affected outside. In the coupling position of the pull rod 28 on the support frame 12, the support pin 46 is located at the upper end of the web extension 44, namely coaxially to the central axis 54.
  • the coupling is effected by means of a hook 56 which is welded to the outside of the guide tube 18, namely along a vertical area which forms an angle of approximately 30 ° with the vertical plane containing the axis of the support bolt 46, so that the position of the hook 56 in FIG. 1 appears offset inwards.
  • the hook 56 protrudes into the contour of the web extension 44.
  • the upper end of the web extension 44 is semicircular in accordance with the inner contour of the hook 56, so that there is a projecting nose 58 for the lower limitation of the right-hand slot web section, which for transferring the support pin 46 from the first suspension position 50 into the coupling position according to FIG. 1 serves.
  • a radial, horizontal support arm 60 is also welded to each diagonal strut 22 and projects beyond the outer clamping jaw 24 arranged below it to the outside.
  • the manhole ring gripper 10 hangs on the lifting bolt 46, in which in FIG. 1 position shown.
  • the jaws 24, 38 are located yourself in an inwardly retracted position.
  • the support frame 12 can thus be retracted into a manhole ring until it rests on the three support arms 60.
  • a further lowering of the support bolt 46 leads it downward in the web extension 44.
  • the pull rod 28 only lowers until its plate 30 is seated on the guide tube 18.
  • the pivot pin 46 reaches the left flank of the web extension 44 by slight pivoting on the boom of the load lifter. Then the operator switches to "lifting" and the pivot pin 46 arrives in the right branch of the slot web 42 and is then forcibly guided into the first coaxial suspension position 50 .
  • the pull rod 28 extends upwards out of the guide tube 18, the links 34, which act as an axial-radial displacement converter, moving the slides 22 outwards and their clamping jaws 24 being pressed against the inner surface of the shaft ring. Thanks to their swiveling, automatic fine adjustment takes place.
  • the manhole gripper 10 jams on the manhole ring and takes it along with the further upward movement.
  • the manhole ring hangs exactly horizontally and can therefore be placed exactly on a previously staggered manhole ring.
  • a slight lowering of the support bolt 46 then leads it along the nose 58 of the plate 30 into the bottom extension 44, in which it can be lifted afterwards, if necessary after being supported by slightly pivoting the boom of the load lifter into the position shown in FIG. 1 shown clutch position arrives.
  • the downward movement of the support bolt 46 results in a lowering of the pull rod 28, so that the clamping jaws 24 become detached from the shaft ring.
  • the support frame 12 can thus be lifted out of the shaft ring again.
  • the shaft ring gripper 10 is shown in FIG. 1 shown in the manhole cover opening of the shaft cone with its lower jaws 38 retracted.
  • Usual manhole cones have a manhole cover diameter of 600 mm.
  • the jaws 38 of the lower jaw group are adjusted to this dimension.
  • the support pin 46 must be moved out of the web extension 44 into the slot track 42 in the manner already described, but now into the left branch of this slot track 42 until the support pin 46 reaches the second suspension position 52. This lies above the center of gravity of the shaft cone, so that when it is raised further, the lower group of clamping jaws 38 is placed on the wall of the shaft cone, clamped, and the shaft cone can then be transported in a horizontal position.
  • the shaft ring gripper 10 should be aligned with its plate 30 when transporting shaft cones with respect to the axial plane of the shaft cone into which the axes of the two cone openings fall. This can be accomplished very simply in that the plate 30 is aligned with one of the support arms 60. This support arm 60 is aligned with the vertical jacket area of the shaft cone, the crampons in the interior of the shaft cone being an orientation aid. An important detail of this invention is therefore that the plate 30 lies with one of the extension arms 60 in an axial plane.

Abstract

The lifting jig of the hoist has a central, vertical pulling shaft (28) moving inside a vertical guide sleeve (18) which supports the lifting jig. Three grips (24) are mounted on crank arms (34) which are moved radially in response to the relative vertical movements of the central shaft and the sleeve. The upper end of the shaft is fitted with a slotted control plate (30) while the sleeve has an upper hooked extension (56) which sits over a lifting profile (46) of the hoist. The position of the lifting profile in the slots defines the radial setting of the grips. Each grip is linked to a lower grip (38) by a second crank arm (36) with the lower grip operating on a smaller diameter and angled. The lower grips are used to grip inside conical profiles which are fitted to the top of a reinforcing shaft and which have a smaller diameter access hole. The slot pattern has two grip positions (50,52) corresponding to the two ring shapes to be lifted, and a third position (58) corresponding to a non-grip setting.

Description

Die Erfindung betrifft einen Schachtringgreifer mit einem Traggestell, das eine erste Gruppe aus drei im Winkelabstand von 120° zueinander in einer Horizontalebene liegende Klemmbacken aufweist.The invention relates to a shaft ring gripper with a support frame which has a first group of three clamping jaws lying at an angular distance of 120 ° to one another in a horizontal plane.

Schachtringgreifer dieser Art verwenden an Ketten hängende zangenartige Klemmvorrichtungen mit jeweils zwei Klemmbacken, die sich innen und außen an der Rohrwand anlegen und beim Anheben des Traggestells die Rohrwand zwischen sich festklemmen. Nachteilig ist, daß die Bedienungsperson des Gerätes den Steuerstand verlassen muß, um die Klemmbacken zu positionieren. Ein weiterer Nachteil besteht darin, daß zwar Schachtringe in lotrechter Position transportiert und versetzt werden können, nicht aber sog. Konen, die sich vom Schachtringdurchmesser auf den Kanaldeckeldurchmesser nach oben verjüngen. Solche Konen haben die Form eines schiefen Kegelstumpfes, weil der Mantel längs einer Mantellinie lotrecht verlaufen muß, wo Steigbügel für das Begehen des Schachtes angebracht sind. Ein solcher Konus für eine Schachtrohrweite von 1000 mm hat eine Kanaldeckelöffnung von 600 mm. Werden solche Konen an der Kanaldeckelöffnung vom Schachtgreifer erfaßt, so hängen sie wegen des exzentrischen Schwerpunktes schief, weswegen das Aufsetzen eines Konus' auf ein Schachtrohr problematisch ist.Manhole ring grippers of this type use chain-like pliers-like clamping devices, each with two clamping jaws, which rest on the inside and outside of the pipe wall and clamp the pipe wall between them when the support frame is lifted. It is disadvantageous that the operator of the device has to leave the control station in order to position the clamping jaws. Another disadvantage is that shaft rings can be transported and displaced in the vertical position, but not so-called cones, which taper upwards from the shaft ring diameter to the manhole cover diameter. Such cones have the shape of an oblique truncated cone because the shell must run perpendicular to a surface line, where stirrups are attached for accessing the shaft. Such a cone for a shaft pipe width of 1000 mm has a manhole cover opening of 600 mm. If such cones are gripped by the manhole gripper at the manhole cover opening, they hang askew because of the eccentric center of gravity, which is why placing a cone on a manhole is problematic.

Aufgabe der Erfindung ist es, einen Schachtringgreifer zu schaffen, der von einer Bedienungsperson ausschließlich vom Steuerstand des Gerätes her bedient werden kann und mit dem nicht nur Schachtringe, sondern auch die zugehörigen Konen unproblematisch versetzt werden können, ohne an dem Schachtringgreifer Verstellungen vornehmen zu müssen.The object of the invention is to provide a manhole ring gripper that can be operated by an operator only from the control station of the device and with which not only manhole rings, but also the associated cones can be moved without problems, without having to make adjustments to the manhole ring gripper.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Traggestell drei wenigstens angenähert radial gerichtete Führungskörper in gleichem Abstand von einer lotrechten Zentralachse des Traggestells aufweist, in denen je ein, mit einer Klemmbacke bestücktes Spannorgan, vorzugsweise ein Schieber beweglich gelagert ist, daß das Traggestell ein, zur Zentralachse koaxiales Führungsorgan aufweist, in dem ein Zugelement axial verschiebbar geführt ist, daß das Zugelement mit einem Axialradial-Wegumsetzer verbunden ist, der seinerseits mit den Schiebern derart verbunden ist, daß bei axialer Relativverschiebung des Zugelementes zum Führungsorgan die Klemmbacken synchron radial bewegt werden, daß am oberen Ende des Zugelementes ein Aufhängemittel für einen Lastheber vorgesehen ist, daß am Traggestell eine zweite Gruppe aus drei verschiebbaren Klemmbacken in einer unterhalb der Horizontalebene der ersten Gruppe Klemmbacken liegenden Parallelebene vorgesehen ist, deren Klemmbacken auf einem kleineren Durchmesser als die der ersten Gruppe liegen, daß das Aufhängemittel eine erste koaxiale Aufhängeposition für den Lastheber und eine davon in radialem Abstand liegende zweite Aufhängeposition aufweist, und daß eine Kupplungseinrichtung vorgesehen ist, mit der das Zugelement mit dem Führungsorgan für das Ein- und Ausfahren der Klemmbacken in bzw. aus einem Schachtring derart kuppelbar ist, daß die Funktion des Axialradial-Wegumsetzers ausgeschaltet ist.This object is achieved in that the support frame has three at least approximately radially directed guide bodies at the same distance from a vertical central axis of the support frame, in each of which a clamping member equipped with a clamping jaw, preferably a slide, is movably mounted that the support frame is a, has coaxial guide member to the central axis, in which a tension element is guided axially displaceably, that the tension element is connected to an axial-radial displacement converter, which in turn is connected to the slides in such a way that the jaws are moved synchronously radially when the tension element is axially displaced relative to the guide element, that at the upper end of the pulling element there is provided a suspension means for a load lifter, that a second group of three displaceable clamping jaws is provided on the supporting frame in a parallel plane lying below the horizontal plane of the first group of clamping jaws, the clamping plane of which cken on a smaller diameter than that of the first group, that the suspension means has a first coaxial suspension position for the load lifter and a second suspension position lying radially spaced therefrom, and that a coupling device is provided with which the tension element with the guide element for the Ein - And extending the clamping jaws in or out of a shaft ring can be coupled such that the function of the axial radial displacement converter is switched off.

Der erfindungsgemäße Schachtringgreifer arbeitet mit einem neuen Klemmprinzip, in dem die Klemmbacken beim Anheben des Traggestells bis zur Anlage an der Innenfläche des Schachringes radial nach außen bewegt werden. Das Gewicht des Schachtringes wird mit hohem Wirkungsgrad in die radial nach außen wirkenden Klemmkräfte umgesetzt. Mit den drei Klemmbacken an der Innenseite des Schachtringes kann dieser sicher aufgenommen, transportiert und versetzt werden. Beim Aufsetzen des Schachtringes wird das Traggestell entlastet. Das Zugelement bewegt die Backen in eine Außerfunktionsstellung radial nach innen. In dieser Stellung des Zugelementes findet eine Kupplung mit dem Führungsorgan des Traggestells statt, sodaß beim anschließenden Ausheben der Klemmbacken aus dem Schachtring keine Relativbewegung zwischen Zugelement und Führungsorgan stattfindet, sodaß auch die Klemmbacken in ihrer eingefahrenen Außerfunktionsstellung verbleiben. In diesem Prinzip liegt der Haupterfindungsgedanke, denn dieser ermöglicht die Bedienung des Gerätes durch eine Person, ohne daß diese den Steuerstand verlassen muß.The manhole ring gripper according to the invention works with a new clamping principle in which the clamping jaws are moved radially outwards when the support frame is lifted until it rests against the inner surface of the chess ring. The weight of the shaft ring is converted with high efficiency into the radially outward clamping forces. With the three clamping jaws on the inside of the manhole ring, it can be securely picked up, transported and moved. When the manhole ring is put on, the load-bearing frame is relieved. The The tension element moves the jaws radially inwards into an inoperative position. In this position of the tension element there is a coupling with the guide element of the support frame, so that when the clamping jaws are subsequently lifted out of the shaft ring, there is no relative movement between the tension element and the guide element, so that the jaws also remain in their retracted inoperative position. This is the principle behind the main idea of the invention, because it enables the device to be operated by one person without having to leave the control station.

Die Spannorgane können statt aus linear beweglichen Schiebern auch aus Schwenkhebeln bestehen.The clamping elements can also consist of swivel levers instead of linearly movable slides.

Dank der zweiten Gruppe Klemmbacken, die vorzugsweise synchron mit der ersten Klemmbackengruppe bewegt werden, wird nun erreicht, daß auch Konen nach demselben Prinzip aufgenommen, transportiert und abgesetzt werden können. Dafür muß das Aufhängemittel in die zweite Aufhängeposition verbracht werden, was eine manuelle Verstellung durch die Bedienungsperson erfordern kann aber nicht muß. Es liegt nämlich im Rahmen der Erfindung, das Aufhängemittel durch Absenken, Verschwenken und erneutes Anheben aus der ersten Aufhängeposition in die zweite Aufhängepositon zu verlagern, ohne daß die Bedienungsperson den Steuerstand verlassen muß. Der Abstand der beiden Aufhängepositionen entspricht der Exzentrizität des Massenschwerpunktes eines Schachtkonus' von der Achse der Kanaldeckelöffnung.Thanks to the second group of jaws, which are preferably moved synchronously with the first group of jaws, it is now achieved that cones can also be picked up, transported and set down according to the same principle. For this, the suspension means must be brought into the second suspension position, which may or may not require manual adjustment by the operator. It is namely within the scope of the invention to shift the suspension means from the first suspension position into the second suspension position by lowering, pivoting and lifting again without the operator having to leave the control position. The distance between the two suspension positions corresponds to the eccentricity of the center of gravity of a shaft cone from the axis of the manhole cover opening.

Beide Gruppen von Klemmbacken können eigene Axialradial-Wegumsetzer aufweisen, die z. B. nach dem Keilprinzip, dem Kniehebelprinzip oder einer Kombination dieser Prinzipien arbeiten können. Vorzugsweise sind jeweils zwei Klemmbacken beider Klemmbackengruppen in einer Axialebene angeordnet und miteinander starr verbunden, sodaß ein Axialradial-Wegumsetzer für dieses Klemmbackenpaar ausreicht.Both groups of clamping jaws can have their own axial radial displacement converters, which, for. B. can work on the wedge principle, the toggle principle or a combination of these principles. Two jaws of both jaw groups are preferably arranged in an axial plane and rigidly connected to each other, so that an axial-radial displacement converter is sufficient for this pair of jaws.

Eine Weiterbildung der Erfindung besteht darin, daß das Zugelement aus dem Führungsorgan bodenseitig vorsteht und an seinem unterhalb der Horizontalebene der ersten Gruppe Klemmbacken liegenden Ende drei Lenker schwenkbar gelagert sind, die sich schräg aufwärts zu jeweils einem der Schieber erstrecken und an diesem oder einem daran befestigten Verbindungsstück angelenkt sind.A further development of the invention is that the tension element protrudes from the guide element on the bottom side and at its end lying below the horizontal plane of the first group of clamping jaws, three links are pivotally mounted, which extend obliquely upward to one of the sliders and fastened to this or to it Connection piece are articulated.

Ein weiteres wichtiges Merkmal besteht darin, daß das belastete Zugelement entlastet werden muß, um die Klemmbacken vom Schachtring lösen zu können. Zu diesem Zweck werden oberhalb der Radialebenen beider Klemmbackengruppen Auflageplatten vorgesehen, die die jeweils ihnen zugeordneten Klemmbacken radial nach außen überragen. Diese an dem Traggestell vorgesehenen Auflageplatten dienen dann zur Auflage des Traggestells auf dem Schachtring. Beim weiteren Absenken des Aufhängemittels, also z.B. eines Kranhakens sorgt das Gewicht des Zugelementes für das Lösen der Klemmbacken. Für die untere zweite Gruppe an Klemmbacken werden gemäß einer Ausgestaltung der Erfindung die Führungskörper für die Schieber der Klemmbacken der ersten Gruppe verwendet, während für die Klemmbacken der ersten Gruppe drei zusätzliche radiale Auflageeisen am Traggestell angeschweißt werden. Die Schieberichtungen der Schieber in den Führungskörpern verlaufen nach außen bezüglich der Horizontalebene unter einem kleinen Winkel leicht ansteigend. Außerdem sind die Klemmbacken an ihren Schiebern oder den daran befestigten Verbindungsstücken schwenkbar gelagert und in eine Ausgangslage gewichts- oder federvorbelastet, in der sie an einem Anschlag anlegen. Diese Merkmale dienen der Erhöhung des Klemmeffektes und wirken einem Abrutschen des Schachtringes entgegen.Another important feature is that the loaded tension element must be relieved in order to be able to release the clamping jaws from the shaft ring. For this purpose, support plates are provided above the radial planes of the two jaw groups, which protrude radially outwards from their respective associated jaws. These support plates provided on the support frame then serve to support the support frame on the shaft ring. When the suspension means is lowered further, for example a crane hook, the weight of the tension element ensures that the jaws are released. According to one embodiment of the invention, the guide bodies for the slides of the jaws of the first group are used for the lower second group of clamping jaws, while three additional radial support irons are welded to the support frame for the clamping jaws of the first group. The sliding directions of the slides in the guide bodies extend slightly outwards with respect to the horizontal plane at a small angle. In addition, the clamping jaws are pivotally mounted on their slides or the connecting pieces attached to them and are preloaded in terms of weight or spring, in which they rest against a stop. These features serve to increase the clamping effect and counteract slipping of the manhole ring.

Die Kupplungseinrichtung kann eine Automatik beinhalten, die dafür sorgt, daß bei den aufeinanderfolgenden Absenkbewegungen des Zugelementes im Führungsorgan abwechselnd eine Entriegelung und eine Verriegelung erfolgt. Dieses ist beispielsweise mittels einer Schwenkklinke am Führungsorgan des Traggestells realisierbar, die sich in der Kupplungsstellung an einem Anschlag des Zugelementes abstützt, sodaß das Zugelement und das Traggestell für gemeinsame Bewegung gekuppelt sind und die in eine Entriegelungsstellung schwenkbar ist, um das Zugelement vom Führungsorgan zu entkuppeln. Eine vorzuziehende Variante besteht erfindungsgemäß darin, daß das Aufhängemittel eine lotrechte Platte mit einer Schlitzanordnung aufweist, daß am Führungsorgan ein Haken benachbart der Platte oder zwei Haken beidseitig der Platte nach oben ragen, die die Kupplungseinrichtung bilden und in die Kontur der Schlitzanordnung eingreifen, und daß der Lastheber einen in der Schlitzanordnung beweglichen Tragbolzen aufweist. Zur Entkupplung braucht die Bedienungsperson also den Tragbolzen nur abzusenken, dann in der Schlitzanordnung der Platte unter dem Haken geringfügig wegzuschwenken und anschließend wieder hochzuziehen, wobei der Bolzen in der Schlitzanordnung automatisch in die koaxiale Aufhängeposition gelangt.The coupling device can include an automatic system which ensures that the successive lowering movements of the tension element in the guide element alternately unlock and lock. This can be achieved, for example, by means of a swivel pawl on the guide member of the support frame, which is supported in the coupling position on a stop of the tension element, so that the tension element and the support frame are coupled for common movement and which can be pivoted into an unlocking position in order to decouple the tension element from the guide element . A preferred variant according to the invention is that the suspension means has a vertical plate with a slot arrangement, that a hook adjacent to the plate or two hooks on both sides of the plate protrude upward on the guide element, which form the coupling device and engage in the contour of the slot arrangement, and that the load lifter has a support bolt movable in the slot arrangement. For decoupling, the operator therefore only needs to lower the support bolt, then pivot it slightly away in the slot arrangement of the plate under the hook and then pull it up again, the bolt automatically reaching the coaxial suspension position in the slot arrangement.

Eine besonders vorteilhafte Weiterbildung besteht nun darin, daß die Schlitzanordnung eine im wesentlichen V-förmige gebogene oder gewinkelte Schlitzbahn aufweist, deren obere Enden die beiden Aufhängepositionen für die beiden Entriegelungsstellungen und zwar für Schachtring- und Schachtkonenbetrieb bilden. Die Bedienungsperson kann also den Tragbolzen vom Steuerstand aus aus einer Aufhängepostion in die andere verfahren, wenn er statt eines Schachtringes einen Schachtkonus zu transportieren hat und umgekehrt. Der Abstand der beiden Aufhängepositionen liegt im Bereich von 40% bis 60% des halben Durchmessers der Klemmbacken der zweiten unteren Gruppe und beträgt vorzugsweise etwa 50% dieses Maßes. Der Massenschwerpunkt des Schachtkonus' liegt dann wenigstens angenähert unterhalb dieser, gegenüber der koaxialen Aufhängeposition versetzten zweiten Aufhängeposition.A particularly advantageous development consists in the fact that the slot arrangement has an essentially V-shaped curved or angled slot path, the upper ends of which form the two suspension positions for the two unlocking positions, specifically for shaft ring and shaft cone operation. The operator can thus move the support bolt from the control position from one suspension position to the other if he has to transport a shaft cone instead of a shaft ring and vice versa. The distance between the two suspension positions is in the range from 40% to 60% of half the diameter of the clamping jaws of the second lower group and is preferably about 50% of that measure. The center of gravity of the shaft cone is then at least approximately below this second suspension position, which is offset from the coaxial suspension position.

Anhand der Zeichnung, die ein Ausführungsbeispiel darstellt, wird die Erfindung näher beschrieben.The invention is described in more detail with reference to the drawing, which represents an exemplary embodiment.

Es zeigt:

FIG. 1
eine Schnittansicht durch den Schachtringgreifer längs der Linie 1-1 der Figur 2,
FIG.
2 eine teilweise geschnittene Draufsicht auf den Schachtringgreifer, und
FIG. 3
einen Vertikalschnitt längs der Linie 3-3 des Schachtringgreifers.
It shows:
FIG. 1
3 shows a sectional view through the shaft ring gripper along the line 1-1 of FIG. 2,
FIG.
2 shows a partially sectioned top view of the manhole ring gripper, and
FIG. 3rd
a vertical section along the line 3-3 of the shaft ring gripper.

Der Schachtringgreifer 10 hat ein Traggestell 12, das aus einem horizontalen Dreieckrahmen 14 besteht, welcher mittels radialer Streben 16 ein lotrechtes Führungsrohr 18 trägt. An den drei Ecken des Dreieckrahmens 14 ist jeweils eine etwa radial gerichtete Führungsbuchse 20 angeschweißt, von der sich eine Diagonalstrebe 22 schräg aufwärts nach innen zum Führungsrohr 18 erstreckt. In jeder Führungsbuchse 20 ist ein stangenförmiger Schieber 22 verschiebbar gelagert. Die Schieberichtung des Schiebers 22 verläuft in einer Axialebene nach außen unter einem kleinen Winkel leicht aufwärts. Jeder der drei Schieber 22 trägt an seinem vorderen Ende eine Klemmbacke 24, deren Klemmfläche konvex gewölbt und zur Verbesserung der Haltefunktion gezahnt ist. Die Klemmbacke 24 ist in ihrer unteren Hälfte am Schieber 22 schwenkbar gelagert und weist einen nach hinten ragenden Gewichtsarm 26 auf, für den die Führungsbuchse 20 einen Anschlag bildet. Bei einem ersten Kontakt der Klemmbacke 24 mit einem Schachtring, kann die Klemmbacke 24 damit im Uhrzeigersinn (FIG. 1) verschwenken, um den Klemmeingriff zu verstärken.The manhole ring gripper 10 has a support frame 12 which consists of a horizontal triangular frame 14 which carries a vertical guide tube 18 by means of radial struts 16. An approximately radially directed guide bushing 20 is welded to each of the three corners of the triangular frame 14, from which a diagonal strut 22 extends obliquely upward inwards to the guide tube 18. In each guide bush 20, a rod-shaped slide 22 is slidably mounted. The sliding direction of the slide 22 extends slightly upwards in an axial plane at a small angle. Each of the three slides 22 carries at its front end a clamping jaw 24, the clamping surface of which is convexly curved and toothed to improve the holding function. The jaw 24 is pivotally mounted in its lower half on the slide 22 and has a weight arm 26 projecting towards the rear, for which the guide bush 20 forms a stop. When the clamping jaw 24 makes a first contact with a Shaft ring, the jaw 24 can thus pivot clockwise (FIG. 1) to reinforce the clamping engagement.

Im Führungsrohr 18 ist eine Zugstange 28 lotrecht verschiebbar geführt. Die Zugstange 28 ragt beidseitig aus dem Führungsrohr 18 heraus, ist an ihrem oberen Ende geschlitzt und mit einer in den Schlitz eingesetzten lotrechten Platte 30 verschweißt. Auf das untere Ende der Zugstange 28 ist ein Flansch 32 aufgeschraubt, an dem drei Lenker 34 schwenkbar gelagert sind, die sich radial nach außen schrägt ansteigend erstrecken und an je einer Verbindungsplatte 36 schwenkbar gelagert sind, die ihrerseits am hinteren Ende des jeweiligen Schiebers 22 angeschweißt ist. Die Verbindungsplatte 36 erstreckt sich vom Schieber 22 abwärts und dient am unteren Ende zur schwenkbaren Lagerung einer weiteren Klemmbacke 38, die mit der Klemmbacke 24 übereinstimmt und ebenfalls einen hinteren Gewichtsarm aufweist, um die Klemmbacke 38 in einer Ausgangsstellung in Anlage an der Stirnwand der Verbindungsplatte 36 zu halten.In the guide tube 18, a pull rod 28 is guided to be vertically displaceable. The pull rod 28 protrudes from the guide tube 18 on both sides, is slotted at its upper end and welded to a vertical plate 30 inserted into the slot. On the lower end of the tie rod 28, a flange 32 is screwed, on which three links 34 are pivotally mounted, which extend inclined radially outwards and are pivotably mounted on a connecting plate 36, which in turn is welded to the rear end of the respective slide 22 is. The connecting plate 36 extends downward from the slide 22 and serves at the lower end for the pivotable mounting of a further clamping jaw 38, which corresponds to the clamping jaw 24 and also has a rear weight arm, around the clamping jaw 38 in a starting position in contact with the end wall of the connecting plate 36 to keep.

Das Traggestell 12 weist also eine erste Dreiergruppe Klemmbacken 24 auf, die in einer Horizontalebene liegen sowie eine zweite Dreiergruppe Klemmbacken 38, die in einer unterhalb dieser Horizontalebene liegenden Parallelebene angeordnet sind und auf einem Durchmesser liegen, der etwa 60% des Durchmessers der ersten Klemmbackengruppe 24 beträgt.The support frame 12 thus has a first group of three clamping jaws 24, which lie in a horizontal plane, and a second group of three clamping jaws 38, which are arranged in a parallel plane lying below this horizontal plane and have a diameter which is approximately 60% of the diameter of the first group of clamping jaws 24 is.

Die lotrechte Platte 30 am oberen Ende der Zugstange 28 weist eine Schlitzanordnung 40 auf, welche aus einer gewinkelten, etwa V-förmigen Schlitzbahn 42 und einem von dessen rechtem Bahnzweig ausgehenden Bahnfortsatz 44 besteht. In der Schlitzanordnung 40 ist ein Tragbolzen 46 geführt, der an einer Gabel 48 eines hydraulischen Lasthebers befestigt ist.The vertical plate 30 at the upper end of the pull rod 28 has a slot arrangement 40, which consists of an angled, approximately V-shaped slot track 42 and a track extension 44 starting from its right track branch. A support pin 46 is guided in the slot arrangement 40 and is fastened to a fork 48 of a hydraulic lifter.

Das obere Ende des rechten Bahnzweiges der Schlitzbahn 42 bildet eine erste koaxiale Aufhängeposition 50 für den Tragbolzen 46. Auf gleicher Höhe wird im linken Bahnabschnitt der Schlitzbahn 42 an deren oberen Ende eine zweite Aufhängeposition 52 gebildet, die von der ersten Aufhängeposition 50 einen Horizontalabstand etwa gleich dem halben Achsabstand der unteren Klemmbacken 38 von der mit 54 bezeichneten Zentralachse des Schachtringgreifers 10 hat. Der Bahnfortsatz 44 verläuft etwa parallel zum linken Bahnabschnitt der Schlitzbahn 42, jedoch versetzt zu diesem bis zu einer lotrechten Ebene, die den Tragbolzen 46 in der Stellung gemäß FIG. 1 außen tangiert. In der Kupplungsstellung der Zugstange 28 am Traggestell 12 liegt der Tragbolzen 46 am oberen Ende des Bahnfortsatzes 44 und zwar koaxial zur Zentralachse 54. Die Kupplung wird mittels eines Hakens 56 bewirkt, der außenseitig am Führungsrohr 18 angeschweißt ist und zwar längs eines lotrechten Bereiches, der mit der die Achse des Tragbolzens 46 enthaltenden Vertikalebene einen Winkel von etwa 30° bildet, sodaß die Lage des Hakens 56 in FIG. 1 nach innen versetzt erscheint. Der Haken 56 ragt in die Kontur des Bahnfortsatzes 44 hinein. In Figur 1 ist das obere Ende des Bahnfortsatzes 44 halbkreisförmig entsprechend der Innenkontur des Hakens 56 ausgebildet, sodaß sich zur unteren Begrenzung des rechtsseitigen Schlitzbahnabschnittes eine vorspringende Nase 58 ergibt, die zur Überführung des Tragbolzens 46 aus der ersten Aufhängeposition 50 in die Kupplungsposition gemäß FIG. 1 dient.The upper end of the right-hand path branch of the slot path 42 forms a first coaxial suspension position 50 for the supporting bolt 46. At the same height, a second suspension position 52 is formed at the upper end of the slot path 42 at the upper end thereof, which is approximately the same horizontal distance from the first suspension position 50 has half the center distance of the lower clamping jaws 38 from the central axis of the shaft ring gripper 10, designated 54. The web extension 44 runs approximately parallel to the left web section of the slot web 42, but offset to this up to a vertical plane, which the support pin 46 in the position shown in FIG. 1 affected outside. In the coupling position of the pull rod 28 on the support frame 12, the support pin 46 is located at the upper end of the web extension 44, namely coaxially to the central axis 54. The coupling is effected by means of a hook 56 which is welded to the outside of the guide tube 18, namely along a vertical area which forms an angle of approximately 30 ° with the vertical plane containing the axis of the support bolt 46, so that the position of the hook 56 in FIG. 1 appears offset inwards. The hook 56 protrudes into the contour of the web extension 44. In Figure 1, the upper end of the web extension 44 is semicircular in accordance with the inner contour of the hook 56, so that there is a projecting nose 58 for the lower limitation of the right-hand slot web section, which for transferring the support pin 46 from the first suspension position 50 into the coupling position according to FIG. 1 serves.

An jeder Diagonalstrebe 22 ist noch ein radialer horizontaler Auflagearm 60 angeschweißt, der die jeweils darunter angeordnete äußere Klemmbacke 24 nach außen überragt.A radial, horizontal support arm 60 is also welded to each diagonal strut 22 and projects beyond the outer clamping jaw 24 arranged below it to the outside.

Im Ausgangszustand hängt der Schachtringgreifer 10 am Tragbolzen 46 des Lasthebers, in der in FIG. 1 gezeigten Stellung. Die Klemmbacken 24, 38 befinden sich in einer nach innen eingezogenen Stellung. Das Traggestell 12 kann somit in einen Schachtring eingefahren werden, bis es auf den drei Auflagearmen 60 aufliegt. Ein weiteres Absenken des Tragbolzens 46 führt diesen im Bahnfortsatz 44 nach unten. Die Zugstange 28 senkt sich aber nur bis ihre Platte 30 auf dem Führungsrohr 18 aufsitzt. Durch geringes Verschwenken am Ausleger des Lasthebers gelangt der Tragbolzen 46 an die linke Flanke des Bahnfortsatzes 44. Dann schaltet die Bedienungsperson auf "Heben" und der Tragbolzen 46 gelangt in den rechten Zweig der Schlitzbahn 42 und wird dann zwangsweise in die erste koaxiale Aufhängeposition 50 geführt. Beim weiteren Heben fährt die Zugstange 28 aus dem Führungsrohr 18 nach oben aus, wobei die Lenker 34, die als Axialradial-Wegumsetzer wirken, die Schieber 22 nach außen bewegt und deren Klemmbacken 24 zur Anlage an der Innenfläche des Schachtringes gedrückt werden. Dank deren Schwenkbarkeit findet eine selbsttätige Feinjustage statt. Der Schachtgreifer 10 verklemmt sich am Schachtring und nimmt diesen bei der weiteren Aufwärtsbewegung mit. Der Schachtring hängt exakt waagerecht und kann somit auf einem vorher versetzten Schachtring exakt abgesetzt werden. Ein geringfügiges Weiterabsenken des Tragbolzens 46 führt diesen dann entlang der Nase 58 der Platte 30 in den Bodenfortsatz 44 hinein, in welchem er beim anschließenden Anheben, ggf. nach Unterstützung durch leichtes Verschwenken des Auslegers des Lasthebers in die in FIG. 1 gezeigte Kupplungsstellung gelangt. Das Abwärtsfahren des Tragbolzens 46 hat ein Absenken der Zugstange 28 zur Folge, sodaß die Klemmbacken 24 sich vom Schachtring lösen. Das Traggestell 12 kann somit aus dem Schachtring wieder ausgehoben werden.In the initial state, the manhole ring gripper 10 hangs on the lifting bolt 46, in which in FIG. 1 position shown. The jaws 24, 38 are located yourself in an inwardly retracted position. The support frame 12 can thus be retracted into a manhole ring until it rests on the three support arms 60. A further lowering of the support bolt 46 leads it downward in the web extension 44. The pull rod 28 only lowers until its plate 30 is seated on the guide tube 18. The pivot pin 46 reaches the left flank of the web extension 44 by slight pivoting on the boom of the load lifter. Then the operator switches to "lifting" and the pivot pin 46 arrives in the right branch of the slot web 42 and is then forcibly guided into the first coaxial suspension position 50 . During further lifting, the pull rod 28 extends upwards out of the guide tube 18, the links 34, which act as an axial-radial displacement converter, moving the slides 22 outwards and their clamping jaws 24 being pressed against the inner surface of the shaft ring. Thanks to their swiveling, automatic fine adjustment takes place. The manhole gripper 10 jams on the manhole ring and takes it along with the further upward movement. The manhole ring hangs exactly horizontally and can therefore be placed exactly on a previously staggered manhole ring. A slight lowering of the support bolt 46 then leads it along the nose 58 of the plate 30 into the bottom extension 44, in which it can be lifted afterwards, if necessary after being supported by slightly pivoting the boom of the load lifter into the position shown in FIG. 1 shown clutch position arrives. The downward movement of the support bolt 46 results in a lowering of the pull rod 28, so that the clamping jaws 24 become detached from the shaft ring. The support frame 12 can thus be lifted out of the shaft ring again.

Soll nun ein den Schacht nach oben abschließender Konus transportiert werden, so wird der Schachtringgreifer 10 in der in FIG. 1 gezeigten Stellung in die Kanaldeckelöffnung des Schachtkonus mit seinen unteren Klemmbacken 38 eingefahren. Übliche Schachtkonen haben einen Kanaldeckeldurchmesser von 600 mm. Auf dieses Maß sind die Klemmbacken 38 der unteren Klemmbackengruppe eingestellt. Die Bodenflächen der Führungsbuchsen 20, die sich radial nach innen bis mindestens zum Durchmesser der unteren Klemmbacken 38 erstrecken, bilden Auflageflächen des Traggestells 12 auf dem oberen Konusrand. Nunmehr muß der Tragbolzen 46 in der schon beschriebenen Weise aus dem Bahnfortsatz 44 heraus in die Schlitzbahn 42 bewegt werden, nun jedoch in den linken Zweig dieser Schlitzbahn 42, bis der Tragbolzen 46 die zweite Aufhängeposition 52 erreicht. Diese liegt oberhalb des Massenschwerpunktes des Schachtkonus', sodaß beim weiteren Anheben die untere Gruppe Klemmbacken 38 an der Wand des Schachtkonus angelegt, geklemmt und anschließend der Schachtkonus in waagerechter Stellung transportiert werden kann.If a cone that closes the shaft upwards is now to be transported, the shaft ring gripper 10 is shown in FIG. 1 shown in the manhole cover opening of the shaft cone with its lower jaws 38 retracted. Usual manhole cones have a manhole cover diameter of 600 mm. The jaws 38 of the lower jaw group are adjusted to this dimension. The bottom surfaces of the guide bushings 20, which extend radially inwards up to at least the diameter of the lower clamping jaws 38, form contact surfaces of the support frame 12 on the upper cone edge. Now the support pin 46 must be moved out of the web extension 44 into the slot track 42 in the manner already described, but now into the left branch of this slot track 42 until the support pin 46 reaches the second suspension position 52. This lies above the center of gravity of the shaft cone, so that when it is raised further, the lower group of clamping jaws 38 is placed on the wall of the shaft cone, clamped, and the shaft cone can then be transported in a horizontal position.

Der Vollständigkeit halber sei noch nachzutragen, daß der Schachtringgreifer 10 beim Transportieren von Schachtkonen mit seiner Platte 30 bezüglich der Axialebene des Schachtkonus' auszurichten ist, in die die Achsen der beiden Konusöffnungen fallen. Dies läßt sich sehr einfach dadurch bewerkstelligen, daß die Platte 30 mit einem der Auflagearme 60 ausgerichtet ist. Dieser Auflagearm 60 wird mit dem lotrechten Mantelbereich des Schachtkonus ausgerichtet, wobei die Steigeisen im Inneren des Schachtkonus eine Orientierungshilfe sind. Ein wichtiges Detail dieser Erfindung besteht also darin, daß die Platte 30 mit einem der Auslegerarme 60 in einer Axialebene liegt.For the sake of completeness, it should be added that the shaft ring gripper 10 should be aligned with its plate 30 when transporting shaft cones with respect to the axial plane of the shaft cone into which the axes of the two cone openings fall. This can be accomplished very simply in that the plate 30 is aligned with one of the support arms 60. This support arm 60 is aligned with the vertical jacket area of the shaft cone, the crampons in the interior of the shaft cone being an orientation aid. An important detail of this invention is therefore that the plate 30 lies with one of the extension arms 60 in an axial plane.

Claims (10)

Schachtringgreifer mit einem Traggestell (12), das eine erste Gruppe aus drei im Winkelabstand von 120° zueinander in einer Horizontalebene liegenden Klemmbacken (24) aufweist, dadurch gekennzeichnet, daß das Traggestell (12) drei wenigstens angenähert radial gerichtete Führungskörper (20) in gleichem Abstand von einer lotrechten Zentralachse (54) des Traggestells (12) aufweist, in denen je ein mit einer Klemmbacke (24) bestücktes Spannorgan (22) ausfahrbar gelagert ist, daß das Traggestell (12) ein zur Zentralachse (54) koaxiales Führungsorgan (18) aufweist, in dem ein Zugelement (28) axial verschiebbar geführt ist, daß das Zugelement (28) mit einem Axialradial-Wegumsetzer (34) verbunden ist, der seinerseits mit den Schiebern (22) derart verbunden ist, daß bei axialer Relativverschiebung des Zugelementes (28) zum Führungsorgan (18) die Klemmbacken (24) synchron radial bewegt werden, daß am oberen Ende des Zugelementes ein Aufhängemittel (30) für einen Lastheber (46, 48) vorgesehen ist, daß am Traggestell (12) eine zweite Gruppe aus drei ausfahrbaren Klemmbacken (38) in einer unterhalb der Horizontalebene der ersten Klemmbackengruppe (24) liegenden Parallelebene vorgesehen ist, deren Klemmbacken (38) auf einen kleineren Durchmesser als die der ersten Gruppe liegen, daß das Aufhängemittel (30) eine erste koaxiale Aufhängeposition (50) für den Lastheber (46, 48) und eine davon in radialem Abstand liegende zweite Aufhängeposition (52) aufweist, und daß eine Kupplungseinrichtung vorgesehen ist, mit der das Zugelement (28) mit dem Führungsorgan (18) für das Ein- und Ausfahren der Klemmbacken (24, 38) in und aus einem Schachtring derart kuppelbar ist, daß die Funktion des Axialradial-Wegumsetzers (34) ausgeschaltet ist.Manhole ring gripper with a support frame (12) which has a first group of three clamping jaws (24) lying at an angular distance of 120 ° to one another in a horizontal plane, characterized in that the support frame (12) has three at least approximately radially directed guide bodies (20) in the same Has a distance from a vertical central axis (54) of the support frame (12), in each of which a clamping element (22) equipped with a clamping jaw (24) is extendably mounted, so that the support frame (12) has a guide element (18) coaxial with the central axis (54) ), in which a tension element (28) is axially displaceably guided, that the tension element (28) is connected to an axial-radial displacement converter (34), which in turn is connected to the slides (22) in such a way that with axial relative displacement of the tension element (28) to the guide member (18), the clamping jaws (24) are moved radially synchronously, in such a way that at the upper end of the pulling element a suspension means (30) for a load lifter (46, 48) It is provided that a second group of three extendable jaws (38) is provided on the support frame (12) in a parallel plane lying below the horizontal plane of the first jaw group (24), the jaws (38) of which are smaller in diameter than that of the first group that the suspension means (30) has a first coaxial suspension position (50) for the load lifter (46, 48) and a second suspension position (52) lying at a radial distance therefrom, and that a coupling device is provided with which the tension element (28) can be coupled with the guide member (18) for moving the clamping jaws (24, 38) in and out of a shaft ring in such a way that the function of the axial-radial displacement converter (34) is switched off. Schachtringgreifer nach Anspruch 1, dadurch gekennzeichnet, daß jede Klemmbacke (38) der zweiten Klemmbackengruppe mit einem Spannorgan (22) der ersten Gruppe Klemmbacken (24) für gemeinsame Bewegung beider Klemmbacken (24, 38) verbunden ist.Manhole ring gripper according to claim 1, characterized in that each jaw (38) of the second jaw group is connected to a clamping member (22) of the first group of jaws (24) for the joint movement of both jaws (24, 38). Schachtringgreifer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Zugelement (28) aus dem Führungsorgan (18) bodenseitig vorsteht und an seinem unterhalb der Horizontalebene der ersten Gruppe Klemmbacken (24) liegenden Ende drei Lenker (34) schwenkbar gelagert sind, die sich schräg aufwärts zu jeweils einem der als Schieber ausgebildeten Spannorgane (22) erstrecken und an diesem oder einem daran befestigten Verbindungsstück (36) schwenkbar gelagert sind.Manhole ring gripper according to claim 1 or 2, characterized in that the pulling element (28) protrudes from the guide element (18) on the bottom and at its end below the horizontal plane of the first group of clamping jaws (24) three links (34) are pivotably mounted, which extend obliquely upwards to one of the tensioning members (22) designed as a slide and are pivotably mounted on this or a connecting piece (36) attached to it. Schachtringgreifer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Führungsorgan (18) aus einem Außenrohr und das Zugelement (28) aus einem koaxialen Innenrohr besteht.Manhole ring gripper according to one of claims 1 to 3, characterized in that the guide member (18) consists of an outer tube and the pulling element (28) consists of a coaxial inner tube. Schachringgreifer nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Führungskörper (20) für die als Schieber ausgebildeten Spannorgane (22) oder an den Führungskörpern (20) befestigte Auflageplatten sich nach innen wenigstens angenähert bis zum Durchmesser der zweiten Gruppe Klemmbacken (38) erstrecken oder diese nach innen überragen und Auflagemittel zur Auflage auf einen Schachtringkonus bilden.Chess ring gripper according to one of claims 1 to 4, characterized in that the guide bodies (20) for the clamping members (22) designed as slides or support plates fastened to the guide bodies (20) at least approximate inwards to the diameter of the second group of clamping jaws (38 ) extend or protrude inwards and form support means for support on a shaft ring cone. Schachtringgreifer nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Schieberichtungen der als Schieber ausgebildeten Spannorgane (22) in den Führungskörpern (20) nach außen bezüglich der Horizontalebene unter einem kleinen Winkel leicht ansteigend verlaufen.Manhole ring gripper according to one of claims 1 to 5, characterized in that the sliding directions of the tensioning members (22) designed as slides in the guide bodies (20) extend slightly outwards with respect to the horizontal plane at a small angle. Schachtringgreifer nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Klemmbacken (24, 38) an ihren Spannorganen (22) oder den daran befestigten Verbindungsstücken (36) derart exzenterartig schwenkbar gelagert sind, daß sie nach Berührung am Schachtring bei Aufwärtsbewegung des Zugelementes (28) im Sinne einer Klemmverstärkung verschwenken, und daß die Klemmbacken (24, 38) in entgegengesetzter Richtung in eine Ausgangslage gewichts- oder federvorbelastet sind, in der sie an einem Anschlag anlegen.Manhole ring gripper according to one of claims 1 to 6, characterized in that the clamping jaws (24, 38) are pivotably mounted on their tensioning members (22) or the connecting pieces (36) attached thereto in such an eccentric manner that they touch the shaft ring when the pulling element moves upwards (28) pivot in the sense of a clamping reinforcement, and that the clamping jaws (24, 38) are preloaded in the opposite direction into a starting position in which they rest against a stop. Schachtringgreifer nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Traggestell (12) in einer oberhalb der Horizontalebene der ersten Gruppe Klemmbacken (24) liegenden Parallelebene einzelne Auflagearme (60) aufweist, die über den Außendurchmesser der ersten Gruppe Klemmbacken (24) radial vorstehen.Manhole ring gripper according to one of claims 1 to 7, characterized in that the support frame (12) has individual support arms (60) in a parallel plane lying above the horizontal plane of the first group of clamping jaws (24), said support arms (60) over the outside diameter of the first group of clamping jaws (24) project radially. Schachtringgreifer nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Aufhängemittel eine lotrechte Platte (30) mit einer Schlitzanordnung (40) aufweist, daß am Führungsorgan (18) ein Haken (56) benachbart der Platte (30) nach oben ragt, der die Kupplungseinrichtung bildet und - von der Seite gesehen - in die Kontur der Schlitzanordnung (40) eingreift, daß der Lastheber (46, 48) einen in der Schlitzanordnung (40) beweglichen Tragbolzen (46) aufweist, daß die beiden Aufhängepositionen (50, 52) durch zwei obere Enden einer winkligen oder bogenförmigen Schlitzbahn (42) gebildet sind und von dieser ein Bahnfortsatz (44) abzweigt, der sich bis in einen, unter der koaxialen Aufhängeposition (50) liegenden, ebenfalls koaxialen Bereich der Schlitzanordnung (40) erstreckt, in welchem sich der Tragbolzen (46) in seiner mit dem Haken (56) verriegelten Kupplungsstellung befindet.Manhole ring gripper according to one of claims 1 to 8, characterized in that the suspension means has a vertical plate (30) with a slot arrangement (40), that on the guide member (18) a hook (56) projects upwards adjacent to the plate (30), which forms the coupling device and - seen from the side - engages in the contour of the slot arrangement (40), that the load lifter (46, 48) has a support bolt (46) movable in the slot arrangement (40), that the two suspension positions (50, 52) are formed by two upper ends of an angled or arcuate slot path (42) and branches off from this a path extension (44) which extends into an area of the slot arrangement (40) which is also coaxial and lies below the coaxial suspension position (50) , in which the supporting bolt (46) is in its coupling position locked with the hook (56). Schachtringgreifer nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die beiden Aufhängepositionen (50, 52) für den Tragbolzen (46) einen Abstand haben, der im Bereich von 40 % bis 60 % des Abstandes der unteren, auf kleinerem Durchmesser liegenden Klemmbacken (38) von der Zentralachse (54) des Traggestells (12) liegt.Manhole ring gripper according to one of claims 1 to 9, characterized in that the two suspension positions (50, 52) for the supporting bolt (46) are at a distance which is in the range from 40% to 60% of the distance between the lower clamping jaws, which have a smaller diameter (38) from the central axis (54) of the support frame (12).
EP95110806A 1994-08-30 1995-07-11 Shaft ring gripper Expired - Lifetime EP0703184B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9413933U 1994-08-30
DE9413933U DE9413933U1 (en) 1994-08-30 1994-08-30 Manhole grab

Publications (2)

Publication Number Publication Date
EP0703184A1 true EP0703184A1 (en) 1996-03-27
EP0703184B1 EP0703184B1 (en) 1997-05-21

Family

ID=6912974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95110806A Expired - Lifetime EP0703184B1 (en) 1994-08-30 1995-07-11 Shaft ring gripper

Country Status (4)

Country Link
EP (1) EP0703184B1 (en)
AT (1) ATE153310T1 (en)
DE (2) DE9413933U1 (en)
ES (1) ES2103619T3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004044615A1 (en) * 2004-09-13 2006-03-30 Schmölz, Florian Gripping and lifting device for hollow cylindrical objects such as pipes on building sites, has grips for selectively applying outwardly directed spreading forces and inwardly directed clamping forces
WO2007028794A2 (en) * 2005-09-07 2007-03-15 Wtb Group Ltd Shaft-ring gripper
DE102010016123A1 (en) 2010-03-24 2011-09-29 Florian Schmölz Shaft ring gripper for use with e.g. lift, has arm arranged at support profile, where clamping elements of angle lever and arm form Y-shaped three point inner gripper, and load arm arranged relative to clamping elements
DE102015121798A1 (en) 2015-12-15 2017-06-22 WIMAG GmbH ring gripper
DE102016106412B4 (en) 2016-04-07 2022-02-24 Probst Gmbh Gripping and lifting device for gripped goods

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010036549A1 (en) * 2010-07-21 2012-01-26 Florian Schmölz Shaft ring gripper, has case slidably formed between stop and guide ring, and releasing and/or blocking switching device operative between guide ring and draw pipe based on relative displacement of guide ring and draw pipe
DE102011053503A1 (en) 2011-09-12 2013-03-14 Florian Schmölz Lifting bar for transporting shoring box, has support frame, suspension connected with support frame for connecting lifting bar with construction machine and two gripping elements having gripping ends
CN105174039A (en) * 2015-09-17 2015-12-23 成都中机盈科科技有限公司 Lifting system for U-shaped graphite crucible

Citations (7)

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Publication number Priority date Publication date Assignee Title
US2809070A (en) * 1955-02-28 1957-10-08 Western Electric Co Grapples
US2823948A (en) * 1955-12-21 1958-02-18 Kenneth W Horton Grab for lifting hollow objects
DE1248887B (en) * 1965-02-08 1967-08-31
AT331458B (en) * 1974-03-01 1976-08-25 Semmelrock Kg DEVICE FOR LOADING MANHOLE RINGS OR DGL.
FR2380216A1 (en) * 1977-02-14 1978-09-08 Filliette Gerard Lifting grab with manual cable operation - has jaws forced onto panel or pipe by lifting force on pivoted levers
DE3808644C1 (en) * 1988-03-15 1989-07-13 Deutsche Gesellschaft Fuer Wiederaufarbeitung Von Kernbrennstoffen Mbh, 3000 Hannover, De
DE4221819A1 (en) * 1992-07-03 1994-01-13 Ulrich Rein Simple lifting appts. for hollow concrete blocks - has adjustable screw device carrying pressure members which bear against walls of chamber

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2809070A (en) * 1955-02-28 1957-10-08 Western Electric Co Grapples
US2823948A (en) * 1955-12-21 1958-02-18 Kenneth W Horton Grab for lifting hollow objects
DE1248887B (en) * 1965-02-08 1967-08-31
AT331458B (en) * 1974-03-01 1976-08-25 Semmelrock Kg DEVICE FOR LOADING MANHOLE RINGS OR DGL.
FR2380216A1 (en) * 1977-02-14 1978-09-08 Filliette Gerard Lifting grab with manual cable operation - has jaws forced onto panel or pipe by lifting force on pivoted levers
DE3808644C1 (en) * 1988-03-15 1989-07-13 Deutsche Gesellschaft Fuer Wiederaufarbeitung Von Kernbrennstoffen Mbh, 3000 Hannover, De
DE4221819A1 (en) * 1992-07-03 1994-01-13 Ulrich Rein Simple lifting appts. for hollow concrete blocks - has adjustable screw device carrying pressure members which bear against walls of chamber

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004044615A1 (en) * 2004-09-13 2006-03-30 Schmölz, Florian Gripping and lifting device for hollow cylindrical objects such as pipes on building sites, has grips for selectively applying outwardly directed spreading forces and inwardly directed clamping forces
WO2007028794A2 (en) * 2005-09-07 2007-03-15 Wtb Group Ltd Shaft-ring gripper
WO2007028794A3 (en) * 2005-09-07 2007-05-10 Antec Ltd Shaft-ring gripper
DE102010016123A1 (en) 2010-03-24 2011-09-29 Florian Schmölz Shaft ring gripper for use with e.g. lift, has arm arranged at support profile, where clamping elements of angle lever and arm form Y-shaped three point inner gripper, and load arm arranged relative to clamping elements
DE102015121798A1 (en) 2015-12-15 2017-06-22 WIMAG GmbH ring gripper
DE102015121798B4 (en) * 2015-12-15 2021-01-21 WIMAG GmbH Ring gripper
DE102016106412B4 (en) 2016-04-07 2022-02-24 Probst Gmbh Gripping and lifting device for gripped goods

Also Published As

Publication number Publication date
DE9413933U1 (en) 1994-12-01
ATE153310T1 (en) 1997-06-15
EP0703184B1 (en) 1997-05-21
ES2103619T3 (en) 1997-09-16
DE59500252D1 (en) 1997-06-26

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