EP2248754B1 - Telescopic crane with self-fittable bracing device and fitting method for a bracing device - Google Patents

Description

The invention relates to the technical field of bracing in telescopic cranes, especially in mobile cranes.

Bracing systems are used on cranes or telescopic cranes to increase the load capacity of the boom or its stability or rigidity. In many cases, as in the present invention, the guying device is provided as an integral unit, which may also be referred to as a "guy brace". It has erectable guy supports and a mounting frame for attachment to the crane boom. Ropes are stretched towards the boom head via the guy supports, which partially absorb the forces acting on the boom, thereby relieving or improving the rigidity. The guy supports are fastened via bracing members in the area of the boom pivot axis.

Especially with larger mobile cranes and the guy unit is large and heavy and can not be preassembled on the boom when driving the crane to the site, otherwise height and / or weight restrictions would not be met. In these cases, the guy unit is brought separately to the point of use, and according to the state of the art, the mounting of the guy unit on the boom often has to be done there with an additional hoist, eg another crane. This procedure is already expensive because of the need for the use of another hoist, but also overall laborious and time consuming.

From the WO 2005/092775 A1 a guy system is known in which a guy unit is parked on supports at a point in front of a mobile crane, wherein the mobile crane then moves with its boom under the mounted on the supports tensioning unit, which is then attached to the boom. Disadvantageously, such a pillar construction builds very high and also the exact positioning for connection of boom and tensioning unit is complicated.

The EP 1 342 692 B1 discloses a guy system in which two individual guy supports can be stored on brackets provided on the vehicle to the right and left of the telescopic boom. Here the two guy supports have to be transported, moved and positioned separately.

It is the object of the invention to provide a telescopic crane with self-mountable guying fixture and a guying assembly method which overcomes at least in part, if possible, the problems listed above.

This object is achieved by a telescopic crane tensioning unit system according to claim 1 and by a method for mounting a guy unit on the boom of a telescopic crane according to claim 11. The subclaims define preferred embodiments of the invention.

The telescopic crane tensioning unit system according to the invention comprises a telescopic crane, in particular a mobile crane, with a chassis and a superstructure rotatably mounted thereon, on which an erectile boom is arranged, which has an outer boom base part and one or more jib telescopic parts, and a bracing unit which can be mounted on the boom, the erectable guy supports and a support frame for attachment to the boom. According to the invention, the Aufrichtstützen are connected to a structural unit by the holding frame, and the holding frame has an upwardly opening cross-section, which allows the retraction or engagement of the boom at its open position.

A particular advantage of the embodiment according to the invention lies in the fact that the construction of the guy unit can be designed to be low in construction for mounting on the crane. Namely, because the access of the support frame for the boom is accessible from above, the guy unit can be positioned relatively deep to allow the connection to be made. Nevertheless, the construction according to the invention retains the advantage of being able to provide the guy unit together with the holding frame as an integral structural unit, which can be transported, moved and positioned more easily in this manner.

In one embodiment of the invention, the upwardly opening, in particular open at one side above open holding frame for receiving a boom mounting portion is formed, which may be a Auslegererteilkragen.

It is also provided in a special embodiment that for the transport condition of the guy unit removable auxiliary supports between the free ends of Ausrichtstützen and / or on the support frame, especially at its open cross-sectional portion, are arranged to ensure stability during transport.

In a further embodiment of the invention, a boom-tensioning unit-positioning unit is provided, by means of which the boom and the tensioning unit can be positioned so as to be mutually positionable so that an assembly engagement of the boom in the holding frame can be effected by a boom movement.

In this embodiment, the system according to the invention thus has a device for defined and reproducible relative positioning of boom and tensioning unit, which offers great advantages especially on site at a construction site. Due to the standardized positioning of the clamping unit, the boom only has to "approach" it to be able to initiate the assembly. A separate hoist is no longer necessary, and the standard procedure, the setup process is simple and safe, as well as the result of the boot, so the safe Fixation of the clamping unit. The invention thus provides for cost and effort savings.

In one embodiment, the positioning unit includes positioning elements located at locations that establish a defined spacing relationship between the boom and the support frame.

The invention may be embodied such that the positioning unit (for defined positioning) arranges the tensioning unit with the holding frame at a position at which the holding frame is at a distance from the superstructure articulation point of the boom corresponding to a guy assembly length of the boom.

Because the boom must be properly located to the support frame in order to make the connection easily, the relative positioning can be described using these two elements. In order to produce this relative positioning, however, a certain one of these two parts does not necessarily have to be moved or the positioning unit has to be provided on a specific crane part or a certain tensioning unit part. It is important in the result that the predetermined relative position can be defined and taken reproducible. It is quite possible that cooperating parts of the positioning unit are arranged both on the telescopic crane, especially on the chassis and / or superstructure, and on the guy unit.

• Anschläge oder, insbesondere fixierungsfähige, Markierungen,
• form- oder kraftschlüssige Feststellmittel, die eine Bewegung in mindestens einer Ebene, verhindern,
• form- oder kraftschlüssige Feststellmittel, die eine Bewegung in mindestens einer Ausleger-Abspanneinheits-Abstandsrichtung verhindern,
• lösbare Rastvorrichtungen, speziell kraftlösbare Rastvorrichtungen,
• von oben zugängliche bzw. aufnehmende, seitlich feststellende Stützenaufnahmen, insbesondere in Form von Mulden, Ausnehmungen oder aufgesetzten Aufnahmen, die eine umlaufende, speziell geschlossene Seitenarretierung umfassen, im Besonderen eine ringförmige Seitenarretierung,
• demontierbare Positionierungs- oder Stellstützen an der Abspanneinheit,
• Abspanneinheits-Hebemittel, insbesondere Seile und deren Angriffe an der Abspanneinheit, die zum Bewegen der Abspanneinheit mit dem Ausleger ausgestaltet sind.

The positioning unit can be designed to implement the invention in a wide variety of conceivable ways, as long as it fulfills its positioning purpose - even with more or less operator intervention. For example, it can have one or more of the following positioning elements:

• Stops or, in particular fixable, markings,
• positive or non-positive locking means which prevent movement in at least one plane,
• positive or non-positive locking means which prevent movement in at least one boom-tensioning unit spacing direction,
• detachable locking devices, specially releasable locking devices,
• from above accessible or receiving, laterally detecting support receptacles, in particular in the form of depressions, recesses or mounted recordings, which comprise a peripheral, specially closed side lock, in particular an annular side lock,
• removable positioning or positioning supports on the tensioning unit,
• Bearing unit lifting means, in particular ropes and their attacks on the guy unit, which are designed for moving the guy unit with the boom.

The guy supports can be hydraulically tiltable laterally in addition to a vertical erection possibility on the boom (or else only). The invention can therefore be used for conventional bracing in the boom rocker plane but also for lateral bracing or combined (Y or V bracing) systems.

• die Abspanneinheit mit dem am Ausleger vorgesehenen Hebemittel an einer definierten Stelle positioniert wird (auf dem Kran und/oder auf dem Boden), an welcher ein Montageeingriff des Auslegers in einen Halterahmen der Abspanneinheit durch eine Auslegerbewegung erfolgen kann,
• die Abspanneinheit vom Hebemittel gelöst wird,
• der Ausleger auf eine Abspanneinheits-Montagelänge gefahren wird, wenn diese nach der Positionierung der Abspanneinheit noch nicht erreicht war, und bei dem
• der Ausleger bewegt wird, um den Montageeingriff des Auslegers in dem Halterahmen herzustellen, wobei er von oben in einen sich nach oben öffnenden Querschnitt des Halterahmens eingefahren wird.

According to a further aspect, the invention relates to a method for mounting a guy unit on the boom of a telescopic crane, in which

• the tensioning unit is positioned with the lifting means provided on the boom at a defined location (on the crane and / or on the ground), at which a mounting engagement of the boom in a holding frame of the guy unit can be carried out by a boom movement,
• the tensioning unit is released from the lifting means,
• the boom is moved to a clamping unit mounting length, if this was not reached after the positioning of the guy unit, and in which
• the boom is moved to make the mounting engagement of the boom in the holding frame, wherein it is retracted from above into an upwardly opening cross-section of the holding frame.

In such a method, all of the above-mentioned device and system features can be implemented, even independently of each other. In this sense, the invention is inter alia also to be understood as a use of one of the systems described above in the assembly of a guy unit on the boom of a telescopic crane.

Fig. 1:

eine Abspanneinheit, wie sie bei der vorliegenden Erfindung Verwendung finden kann;

Fig. 2:

Einzelheiten der Abspanneinheit gemäß Fig. 1 an dem Ende, wo sich ihr Halterahmen zur Befestigung am Ausleger befindet;

Fig. 3 bis 7:

Darstellungen, die den Abspanneinheits-Rüstvorgang eines Mobilkrans gemäß der vorliegenden Erfindung in verschiedenen Stadien aufzeigen; und

Fig. 8

eine Darstellung einer alternativen, erfindungsgemäßen Ausführungsform.

The invention will be explained in more detail below with reference to an embodiment and by means of the accompanying drawings. It may include all features described herein individually and in any combination. In the drawings show:

Fig. 1:

a guy unit as may be used in the present invention;

Fig. 2:

Details of the guy unit according to Fig. 1 at the end where its support frame is for attachment to the boom;

3 to 7:

Illustrations showing the guy unit setup process of a mobile crane according to the present invention at various stages; and

Fig. 8

a representation of an alternative, inventive embodiment.

The system according to the invention is realized in the embodiment described herein with reference to a mobile telescopic crane, the example in the FIG. 4 good to see; it can be briefly described in advance as follows:

A telescopic crane has a chassis 1, a superstructure 2 rotatably mounted thereon and a boom 3, which comprises at least one outer boom part 4 and one or more inner boom parts 5 and is tiltable about its axis of rotation by at least one luffing cylinder. In the collar portion 6 of the outer boom part 4 a guying device is provided. This is hydraulically erectable and laterally pivotable on both sides and their variable bracing to the fixed point on the boom head 26 or fixed point of a possibly Existing and fixed bracing to the boom axis of rotation serve to increase the stiffness around both axes transverse to the boom longitudinal axis.

• Das Bezugszeichen 1 zeigt auf das Fahrgestell eines Mobil-Teleskopkrans mit Oberwagen 2 und Ausleger 3. Das äußerstes Auslegerteil oder Auslegergrundteil 4 hat am äußeren Ende den Kragen 6, der zur Verbindung mit einem Halterahmen 10 dient.

The complete tensioning unit 9 is transported separately to the telescopic crane, and is structurally designed so that it can be independently upgraded by the crane. Detailed explanations of this are given by means of the system according to the invention shown in the figures, which comprises the following elements:

• The reference numeral 1 points to the chassis of a mobile telescopic crane with superstructure 2 and boom 3. The utmost boom part or boom base 4 has at the outer end of the collar 6, which serves for connection to a support frame 10.

The numeral 8 denotes in FIG. 3 a transport vehicle that transports a guy unit 9 to the place of use. The support frame 10 is a rigid, upwardly open frame for receiving laterally disposed elements 11, 12, 13, 14, and serves as an interface to the collar of the outer boom part; 11 is a guy support, 12 is an erector cylinder to erect the reach upright and up to about 90 degrees in the seesaw plane, 13 is a pivot bracket to laterally pivot the reach upright and itself, and 14 is a swing cylinder.

The number 15 indicates each one or more locking cylinders per boom side to connect holding frame 10 and collar 6, and at 16 a winch unit for receiving the guy ropes 23 and 24 is indicated, wherein 23 is a variable Seilabspannung to the boom head 26.

Further elements shown in the drawings are a variable-length support 17, a removable support 18, two removable compression struts 19 and 20 for stiffening, a cable suspension 21 and fixed points 22 on the chassis, which serve as (part of) positioning unit (or positioning aid). Finally, the reference numeral 25 is still used for a fixed bracing between tensioning unit 9 and boom foot, 23 for attachment of the cable guy on the boom head 26, 29 for a grid part with attachment point (base 27) and 30 for the crane hook (lifting means).

• Der Kran hat sich in Figur 4 den Abspannbock 9 mittels Anschlagmittel (Hebemittel bzw. Haken 30) vom Transportfahrzeug bzw. Tieflader 8 (Fig. 3) gehoben, in Fahrzeuglängsachse geschwenkt, und mittels der Stützen 17 die auf dem Fahrgestell befindlichen Fixpunkte genau angefahren; damit ist der abgelegte Abspannbock 9 zur Koppelung der Bauteile 10 und 6 genau positioniert. Danach werden die Druckstützen 19 und 20 entfernt; somit ist der obere Bereich frei zum Einwippen des Auslegers. Hier kommt also die erfindungsgemäße Ausgestaltung des Halterahmens mit einem nach oben offenen Querschnitt zur Geltung. Wie dargestellt, kann die Abspanneinheit auf den Stützen 17, 18 relativ tief über dem Boden bzw. über dem Fahrzeug in einer Montageposition angeordnet werden, so dass eine anfällige, hoch bauende Anordnungsweise umgangen werden kann. Dabei bleibt die integrale bauliche Einheit der Abspanneinheit zu jedem Verwendungszeitpunkt bzw. Montagezeitpunkt erhalten, was die Stabilität aber auch die Positionierbarkeit und Bewegbarkeit optimiert.

The preparation of the guy or the Abspannbocks 9 is now carried out in the manner described below, wherein the FIGS. 3 to 8 Reference is made to:

• The crane has moved in FIG. 4 the guy trestle 9 by means of abutment means (lifting means or hooks 30) from the transport vehicle or low loader 8 (FIG. Fig. 3 ) lifted, pivoted in the vehicle longitudinal axis, and precisely approached by means of the supports 17, the fixed points located on the chassis; Thus, the stored Abspannbock 9 is positioned to couple the components 10 and 6 exactly. Thereafter, the pressure supports 19 and 20 are removed; Thus, the upper area is free for luffing the boom. Here is the inventive design of the support frame with an open-topped cross section to advantage. As shown, the tensioning unit can be placed on the supports 17, 18 relatively low above the ground or above the vehicle in a mounting position, so that a vulnerable, high-build arrangement can be avoided. In this case, the integral structural unit of the guy unit is maintained at each time of use or assembly time, which optimizes the stability but also the positioning and mobility.

In FIG. 5 It can be seen that the boom is flipped and connected by means of the bolt units 15 with the collar 6. There is also a connection of hydraulic and electrical interfaces.

The supports 18 are then removed, the supports 17 are retracted.

From the FIG. 6 shows how the brace 25 is mounted and connected. By means of the erection cylinder 12, the guy supports 11 are then erected by about 90 degrees. The guy wires 23 and 24 ( Fig. 8 ) are mounted at 26.

In the FIG. 7 is then still recognizable that by means of the pivoting cylinder 14, the guy support 11 and the pivot bracket 13 are pivoted laterally to the prescribed angle.

An illustration of an alternative embodiment according to the present invention is shown in FIG FIG. 8 to see. Here, a guy unit 9A according to the invention has been placed entirely on the front, ie the cab side of the mobile crane (ie only on the crane), on the supports 17A and 18A. This embodiment has the additional advantage that always a defined starting position for the positioning of the guy unit can be created, regardless of the ground on which the crane is currently located. Otherwise, the assembly and disassembly of the clamping unit 9A can be done in the same manner as previously with reference to the embodiment of FIGS. 1 to 7 has been described.

LIST OF REFERENCE NUMBERS Pos description

1

chassis

2

superstructure

3

boom

4

extreme boom part

5

telescopic boom section

6

Collar extreme boom part

7

Head of innermost boom part

8th

transport vehicle

9, 9A

Tensioning trestle - transport unit

10

Tie - down support frame

11

Bracing trestle - bracing support

12

Tensioning jack - erection cylinder

13

Guy trestle - swivel bracket

14

Tensioning trestle - swivel cylinder

15

Tensioning trestle - locking cylinder

16

Tensioning trestle - winch unit

17, 17A

Tensioning trestle - extendable support

18, 18A

Tensioning trestle - removable support

19

Tensioning trestle - auxiliary support

20

Tensioning trestle - removable auxiliary support

21

slings

22

Fixed points on the chassis

23

variable bracing jack - boom head

25

fixed bracing guy - boom foot

26

Fixed point boom head

Claims (12)

1. A telescopic crane bracing unit system, comprising:

   - a telescopic crane, in particular a mobile crane, comprising a bogie (1) and a superstructure (2) which is arranged on the bogie in such a way that it can be rotated and on which an erectable jib (3) is arranged which comprises an outer base part (4) of the jib and one or more telescopic parts (7) of the jib; and comprising

   - a bracing unit (9) which can be assembled on the jib (3) and comprises erectable bracing supports (11) and a holding frame (10) for fastening to the jib (3),

   - wherein the holding frame (10) connects the bracing supports (11) to form a structural unit, and characterised in that

   - the holding frame (10) exhibits a cross-section which opens upwards and, at its open position, allows the jib (3) to be inserted and/or engaged.
2. The system according to Claim 1, characterised in that the holding frame (10) which opens upwards and is in particular open at the top on one side is configured to receive an assembling portion of the jib which can be a collar (6) of a part of the jib.
3. The system according to Claim 1 or 2, characterised in that auxiliary supports (19, 20) which can be disassembled for the transport state of the bracing unit (9) are arranged between the free ends of the erecting supports and/or on the holding frame, specifically on its open cross-sectional portion.
4. The system according to any one of Claims 1 to 3, characterised in that a jib bracing unit positioning unit (17, 18, 22) is provided, using which the jib (3) and the bracing unit (9) can be positioned in a defined way with respect to each other, such that an assembly engagement between the jib (3) and the holding frame (10) can be achieved by a jib movement.
5. The system according to Claim 4, characterised in that the positioning unit (17, 18, 22) comprises positioning elements which are arranged at positions which establish a defined distance relationship between the jib (3) and the holding frame (10).
6. The system according to Claim 4 or 5, characterised in that in order to position it in a defined way, the positioning unit (17, 18, 22) arranges the bracing unit (9) together with the holding frame (10) at a position at which the holding frame (10) is situated at a distance from the superstructure linking point of the jib (3) which corresponds to a bracing unit assembling length of the jib (3).
7. The system according to any one of Claims 4 to 6, characterised in that cooperating parts of the positioning unit are arranged both on the telescopic crane, specifically on the bogie (1) and/or the superstructure (2), and on the bracing unit (9).
8. The system according to any one of Claims 4 to 7, characterised in that the positioning unit comprises one or more of the following positioning elements:

   - abutments or markings, in particular markings which can be fixed;

   - positive-fit or force-fit defining means which prevent a movement in at least one plane;

   - positive-fit or force-fit defining means which prevent a movement in at least one jib bracing unit distance direction;

   - releasable locking devices, specifically force-releasable locking devices;

   - top-accessible and/or top-receptive, laterally definitive support receptacles, in particular in the form of hollows, cavities or attached receptacles which comprise a circumferential, specifically closed lateral lock, in particular an annular lateral lock (22);

   - positioning or setting supports (17, 18), which can be disassembled, on the bracing unit (9);

   - bracing unit lifting means, in particular cables and their contacts on the bracing unit (9) which are configured to move the bracing unit (9) together with the jib (3).
9. The system according to any one of Claims 1 to 8, characterised in that the bracing supports (11) can be hydraulically pivoted laterally via the pivoting bracket (13).
10. The system according to any one of Claims 1 to 9, characterised in that the bracing unit can be fastened, in the collar region of a part of the jib, in particular in the region of the collar (6) of the base part of the jib, to the latter.
11. A method for assembling a bracing unit (9) on the jib (3) of a telescopic crane, in which:

    - the bracing unit is positioned, using the lifting means (30) provided on the jib (3), at a defined position at which an assembly engagement between the jib (3) and a holding frame (10) of the bracing unit (9) can be achieved by a jib movement;

    - the bracing unit (9) is released from the lifting means (30);

    - the jib (3) is moved to a bracing unit assembling length if this has not yet been reached after the bracing unit has been positioned; and

    - the jib is moved in order to establish the assembly engagement between the jib (3) and the holding frame (10), wherein it is inserted from above into a cross-section of the holding frame (10) which opens upwards.
12. The use of any one of the systems of Claims 1 to 10 in assembling a bracing unit (9) on the jib (3) of a telescopic crane.

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