EP1369373A2 - Telescopic crane boom - Google Patents

Abstract

Telescope jib for a crane comprises an articulated arm, telescopic arms extending out of the articulated arm, and bracing having at least one bracing support (6) positioned on one of the arms and supporting a bracing cable (7). The bracing cable has enlarged parts at one end. A cable lock provided on the bracing support engages in a form-locking manner with the enlarged parts. Preferred Features: The enlarged parts are rope clamps (25). The cable lock is moved in the longitudinal direction of the cable by an actuator, especially a hydraulic cylinder (30). The bracing cable is tensioned on movement of the cable lock.

Description

The present invention relates to a telescopic boom of a crane with a Articulation shot, telescopic shots telescopic from the articulation shot as well a guy that has at least one guy support mounted on one of the shots and has a guy rope supported by the guy support.

In order also in the telescopic boom a lateral guying z. B. against wind forces guy supports can be used, which are not only erected, but can also be spread out in a V-shape. DE 100 22 658 A1 shows a corresponding telescopic boom, in which the guy supports on a Swivel frame are articulated on the top of the articulation shot is pivotally attached. The guy supports can be swiveled by swiveling the swivel frame be erected. In addition, the guy supports can be relative to the swing frame can be pivoted to be spread V-shaped. The movement of the guy supports is controlled by appropriate hydraulic cylinders realized. On the one hand there are hydraulic cylinders articulated on the articulation section provided to raise the guy supports together with the swing frame. On the other hand, there are hydraulic cylinders on the swivel frame and the guy supports articulated to the angular position of the. Guy supports relative to Adjust swing frame. This known arrangement allows the Spread angle of the stay supports independent of the erection of the stay arrangement On the other hand, hiring is difficult and complex Construction, which is relatively complex.

At its freely projecting end, the guy supports are connected with guy ropes, that run off the guy supports. When extending the telescopic boom and after the guy supports are erected accordingly, the guy ropes subtracted from their ends. With the boom extended must be at the tip of the telescopic boom or on the collar of one of the guyed ropes attached to the guy ropes with their guy posts Ends are held on the guy supports, the latter in turn be intercepted at the foot of the boom linkage. Holding the Guy ropes on the guy supports can, for example, have appropriate Winches take place from which the guy ropes run. Such winds must however, due to the large forces, they are dimensioned accordingly therefore difficult. The guy ropes have also been suggested to hold with rope clamps. Here, however, it is expensive to do the ropes exactly to fix in the desired expired length. There are also concerns against permanent operational safety of such rope clamps.

The present invention is therefore based on the object of improving To create telescopic boom of the type mentioned, the disadvantages of Avoids prior art and further develops the latter in an advantageous manner. Preferably, a light and structurally simple bracing should be created be a simple, secure fixing of the guy ropes in the desired expired rope length and tensioning of the guy ropes allowed.

According to the invention, this object is achieved by a telescopic boom Claim 1 solved. Preferred embodiments are the subject of the dependent claims.

According to the present invention, the guy cables that are running can be attached the guy supports locked in a form-locked manner in the respective extended position become. For this purpose, according to the invention, are in accordance with the respective boom lengths Clearances, thickening pieces on the guy ropes and on the guy supports Appropriate rope locks are provided, which with the thickening pieces the guy ropes can be brought into positive engagement. The guy ropes are not on the guy supports via a corresponding winch or fixed a rope clamping mechanism, but positively by the said Rope lock held. By dispensing with a winch, which the guy rope forces can take the correspondingly expensive and heavy winds and the resulting heavy construction can be avoided. moreover the problems of a rope clamp are eliminated. For the latter, the deducted Rope length can be recorded exactly, so that the clamping at the right one Job is done. Another problem is the risk of contamination, so that the clamping effect when the coefficient of friction changes over the course of the operating time changes, which can result in a considerable risk potential. In contrast, the solution of the cable lock according to the invention offers the Advantage of a light design. At the same time, the respective guy rope becomes exact held in the desired length by the fixed thickening pieces is specified.

The guy rope can preferably be in several predetermined lengths on the each guy support can be fixed. In a further development of the invention, each has the guy ropes several, spaced from each other at a predetermined distance Thickening pieces, wherein the cable lock is designed such that the each guy rope optionally with one or more of the thickening pieces can run over the cable lock or, if desired, with the respective one Thickening piece can go into the cable lock to be locked there. To pass through the respective thickening piece either at the cable lock leave or fix there, it can preferably be provided that the cable lock has a movable locking piece that goes in and out of the way of the running rope can be driven. Preferably one can be pivoted Stored locking piece can be provided, which on the running guy rope can be pivoted and pivoted away from this. As an actuator can preferably use a pressure cylinder through which the locking piece of the cable lock can be pivoted accordingly.

The thickening pieces can be designed differently. After an advantageous Execution of the invention consist of the thickening pieces, the radial projections form on the rope, from clamping sleeves, which are pressed onto the guy rope are.

For the guy ropes with the pressed-on rope clamps or corresponding The problem with thickening pieces is that the guy rope is not sensible can be wound on a drum. To remedy this is instead a drum provided as a rope storage a storage bottle, preferably in Arranged inside the guy supports, into which the respective guy rope is pulled can be. The respective storage bottle is preferably multi-course to with the limited length of the respective guy support an adequate one To be able to accommodate guy rope length. In particular, inside the Bracing supports are arranged in the end regions of several deflecting rollers the guy rope is guided accordingly when the telescopic boom in the Bring transport position and the guy rope is cleaned up accordingly.

To easily pull the guy ropes into the respective storage bottle can, are in a development of the invention at the ends of the guy ropes Auxiliary ropes attached, which are drawn into the storage bottle and on appropriate Auxiliary winches can be wound up. Should the respective guy rope in the storage bottle are pulled in, the auxiliary rope is wound onto the auxiliary winch, see above that the guy rope is pulled into the storage bottle instead of the auxiliary rope. Preferably, the auxiliary rope can be considerably smaller and / or smaller in diameter its tensile strength may be weaker than the guy rope. The auxiliary ropes are not used to absorb the tensioning forces. The latter are about the above called rope lock intercepted. When the guy ropes are fully extended the latter are no longer in the storage bottle, in which only the respective one Auxiliary rope is retracted. The auxiliary winch for winding the corresponding Auxiliary ropes are preferably also arranged inside the guy supports.

Especially with very long boom lengths, the boom often bends, what is detrimental to the load capacity of the telescopic boom. By the deflection of the boom also receives the force component acting in the longitudinal direction of the boom a lever arm so that the boom is bent even further. It would therefore be very desirable with the guy rope a deflection intercept and prevent from the very beginning. This is with conventional ones Guy ropes, however, are difficult because the guy ropes are not sufficient can be biased. To remedy this, a Another aspect of the present invention proposed using the cable lock an actuator, in particular a hydraulic cylinder, in the longitudinal direction of the rope move and thereby tension the guy rope. In particular, this can pretensioning of the guy rope or guy ropes can be achieved, so that the bracing takes effect at a very early stage and the deflection of the boom is greatly reduced, especially when luffing jib operation can be. In particular, the lateral deflection can be done by this novel Bracing can be significantly reduced. As a result, the buckling bar is made up from laying and z. B. rocker at a very early stage or held. The hydraulic cylinder allows considerable tension be put on the guy rope. It is understood that the biasing of the guy rope by means of the rope lock actuator regardless of the positive locking between the cable lock described above and brings special advantages to the thickening pieces. Possibly the guy rope could also be designed without thickening pieces and as a rope lock a frictionally acting rope clamp can be provided. Also at Frictional locking can be done by moving the cable lock of a hydraulic drive can be achieved. However, the is preferred previously described positive locking between rope lock and guy rope or the thickening pieces arranged thereon.

In a further development of the invention, the cable lock is preferably in the form of a link Guided such that the cable lock along a first adjustment path section can be brought into and out of engagement with the guy rope and along an adjoining second adjustment path section in the longitudinal direction of the rope in locked state is movable. The rope lock is first with a Movement component led across the rope to lock it. thereupon the rope lock is moved in the longitudinal direction of the rope when locked, to tension the guy rope. To relax the rope, do the reverse Direction. As soon as the rope lock in the first adjustment path section the guide, it is moved with a component of motion across the rope from drove this away.

In a further development of the invention, the hydraulic cylinder of the actuator can be operated with its Piston rod pivoted to the guy support and with his Cylinders carry the rope lock and are guided in the backdrop-like guide his. If the hydraulic cylinder is retracted or extended relative to the piston rod, he follows the travel path specified by the guide. Basically would be it is of course also possible to swivel the hydraulic cylinder on the guy support articulate and guide the piston rod in the link guide. Farther it would be conceivable to use the lateral pivoting movement instead of the guide the hydraulic cylinder by another actuator. Prefers it is, however, to link the piston rod and the cable lock on the collar of the cylinder on which the piston rod emerges. This can a particularly compact arrangement can be achieved.

In order to be able to absorb lateral forces, the guy supports can preferably be used be spread out in a v-shape, each of the guy supports by two separate pivot axes can be pivotally mounted. It can advantageously only one swivel cylinder was assigned to each of the guy supports be, with the help of which the respective guy support, if necessary, by its two Swivel axes is pivotable.

Advantageously, the guy supports are free of cross-connections with each other, d. H. there are no cross struts, lever mechanisms etc. between the guy supports intended. The guy supports are only on their boom side End hinged to the respective boom section and with the associated Swivel cylinder connected. This results in a particularly simple structure the guy arrangement.

Fig. 1

eine perspektivische Ansicht eines Fahrzeugkrans mit einem Teleskopausleger, der eine seitliche Abspannung mit V-förmig aufgespreizten Abspannstützen aufweist, gemäß einer bevorzugten Ausführung der Erfindung,

Fig. 2

eine vergrößerte Ansicht des Anlenkschusses des Teleskopauslegers mit einer daran angelenkten Abspannstütze, die in einer an den Anlenkschuss angeklappten Transportstellung gezeigt ist,

Fig. 3

eine Darstellung der gelenkigen Lagerung der Abspannstütze am Kragen des Anlenkschusses sowie des Hydraulikzylinders zum Aufspreizen der Abspannstütze,

Fig. 4

eine Darstellung der gelenkigen Lagerung der Abspannstütze von einer Innenseite her, die den zweiten Hydraulikzylinder zum Aufrichten der Abspannstütze zeigt,

Fig. 5

eine perspektivische Ansicht des Anlenkschusses mit einer der daran angelenkten Abspannstützen, die in einer aufgerichteten, noch nicht seitlich aufgespreizten Stellung gezeigt ist,

Fig. 6

eine perspektivische Ansicht des Anlenkschusses mit einer der daran angelenkten Abspannstützen, wobei die Abspannstütze in einer aufgerichteten, seitlich aufgespreizten Stellung gezeigt ist,

Fig. 7

eine skelettierte Darstellung einer Abspannstütze, die die Abspannseilführung und die Speicherflasche für das Abspannseil im Inneren der Abspannstütze sowie das Seilschloss zur Verriegelung des Abspannseils zeigt, wobei das Abspannseil in einer in die Speicherflasche eingezogenen Stellung gezeigt ist,

Fig. 8

eine vergrößerte, ausschnittsweise perspektivische Darstellung des Seilschlosses aus Figur 7 in seiner entriegelten Stellung,

Fig. 9

eine vergrößerte, ausschnittsweise Darstellung des Seilschlosses ähnlich Figur 8, wobei das Seilschloss in der eingeschwenkten, verriegelnden Stellung gezeigt ist,

Fig. 10

eine ausschnittsweise Darstellung der gelenkigen Lagerung einer Abspannstütze am Kragen des Anlenkschusses nach einer alternativen Ausführung der Erfindung, bei der die Abspannstütze von einem einzigen Hydraulikzylinder um zwei separate Schwenkachsen geschwenkt, nämlich aufgerichtet und aufgespreizt werden kann,

Fig. 11

eine schematische Darstellung eines mittels eines Stellantriebs zustellbaren Seilschlosses, mit dem das Abspannseil vorgespannt werden kann, nach einer weiteren bevorzugten Ausführung der Erfindung, wobei das Seilschloss in der ausgeschwenkten, nicht mit dem Seil gekuppelten Stellung gezeigt ist,

Fig. 12

eine schematische Darstellung des Seilschlosses aus Figur 14, wobei das Seilschloss bereits in das Seil eingeschwenkt, jedoch noch nicht gespannt ist, und

Fig. 13

das Seilschloss aus den Figuren 14 und 15 in der vollständig vorgespannten Stellung.

The invention is explained in more detail below with the aid of a preferred exemplary embodiment and associated drawings. The drawings show:

Fig. 1

1 shows a perspective view of a mobile crane with a telescopic boom, which has a lateral bracing with V-shaped bracing supports, according to a preferred embodiment of the invention,

Fig. 2

3 shows an enlarged view of the articulation shot of the telescopic boom with a guy support articulated thereon, which is shown in a transport position folded onto the articulation shot,

Fig. 3

a representation of the articulated mounting of the guy support on the collar of the articulation section and of the hydraulic cylinder for spreading the guy support,

Fig. 4

a representation of the articulated mounting of the guy support from the inside, showing the second hydraulic cylinder for erecting the guy support,

Fig. 5

2 shows a perspective view of the articulation shot with one of the guy supports hinged to it, which is shown in an erected position which has not yet been spread open to the side,

Fig. 6

2 shows a perspective view of the articulation shot with one of the guy supports hinged to it, the guy support being shown in an erected, laterally spread-apart position,

Fig. 7

2 shows a skeleton representation of a guy support, which shows the guy rope guide and the storage bottle for the guy rope inside the guy support and the cable lock for locking the guy rope, the guy rope being shown in a retracted position in the guy bottle,

Fig. 8

7 shows an enlarged, fragmentary perspective view of the cable lock from FIG. 7 in its unlocked position,

Fig. 9

8 shows an enlarged, partial illustration of the cable lock similar to FIG. 8, the cable lock being shown in the pivoted-in, locking position,

Fig. 10

2 shows a detail of the articulated mounting of a guy support on the collar of the articulation section according to an alternative embodiment of the invention, in which the guy support can be pivoted about two separate pivot axes by a single hydraulic cylinder, namely it can be erected and expanded,

Fig. 11

2 shows a schematic illustration of a cable lock that can be adjusted by means of an actuator and with which the guy rope can be pretensioned, according to a further preferred embodiment of the invention, the cable lock being shown in the pivoted-out position that is not coupled to the cable,

Fig. 12

14 shows a schematic illustration of the cable lock from FIG. 14, the cable lock already being pivoted into the cable but not yet tensioned, and

Fig. 13

the cable lock from Figures 14 and 15 in the fully biased position.

Figure 1 shows a mobile crane with a telescopic boom 1, which is on the vehicle rotatable about an upright axis of rotation and tiltable about a horizontal axis is articulated. The telescopic boom 1 has an articulated shot 2, which in the mentioned way is articulated to the vehicle, and other telescopic shots 3 and 4, which can be telescoped out of articulation shot 2. Guy 5 the telescopic boom 1 is guided over a pair of guy supports 6. guy wires 7 lead from the free end of the guy supports 6 to the tip of the telescopic boom 1. About guy ropes 8, the guy supports 6 are in turn in the area of Intercepting end of articulation shot 2 intercepted.

The guy supports 6 are not connected to each other, but separately bolted to the side of the collar 9 of the articulation shot 2. They are at two each Swivel axes swivel so that they go from their parallel to the articulation 2 folded transport position raised and spread to the side can be so that the bracing both vertical and lateral forces can intercept.

As FIGS. 2 and 3 show, each of the guy supports 6 is on a bearing bracket 10 articulated, which can be rigidly attached to the collar 9 of the articulation section 2. The bearing brackets 10 are on opposite sides to the right and left of the articulation 2 attached. The guy supports 6 are, so to speak, on the bearing brackets 10 articulated. You can rotate around two separate swivel axes 11 and 12 are pivoted on the console 10. As Figure 3 shows, extends a first pivot axis 11 substantially perpendicular to the vertical plane of longitudinal symmetry of the telescopic boom while the second pivot axis 12 extends parallel to the mentioned longitudinal plane of symmetry of the telescopic boom 1. On the bearing bracket 10 is a bearing piece 13 about the first pivot axis 11 swiveling. On this bearing piece 13, the guy support 6 is the second Swivel axis 12 hinged.

As FIGS. 3, 4 and 5 show, each of the pivot axes is a hydraulic cylinder 35 or 36 assigned. On the one hand, each of the hydraulic cylinders is on the guy support and on the other hand articulated on the bracket 10 or the bearing piece 13, so that the guy support can be swiveled around the two swivel axes can.

After the guy supports 6 have been erected, the guy ropes 7 somewhat extended from the guy supports 6 and at the top of the telescopic boom or a collar of a telescopic shot or one placed on it Cross piece attached. As Figure 7 shows, the guy ropes 7 are not on a winch on the respective guy support 6, but in a storage bottle 16 retracted inside the respective guy support 6. Includes each storage bottle 16 two pulley blocks 17 and 18, each with several Deflection rollers, which are arranged in the respective guy support 6 approximately at the end are. The multi-stranded nature of the storage bottle 16 ensures that sufficient Rope path is available. At the free end of the respective guy support 6, the respective guy rope 7 is guided over a guide roller 19, from where it runs to the tip of the telescopic boom.

After bolting the guy ropes to the boom, the latter becomes its steepest Position erected and telescoped. The guy ropes 7 are pulled out. About two meters before the final destination is reached, it will be below Cable lock explained in more detail, so that the rope thickening is captured becomes. Then the telescopic shots are bolted. Finally, the guy supports be spread into the desired V-angle position.

When the guy rope 7 is pulled out during telescoping, the latter becomes pulled out of the storage bottle 16. To put it back in the Being able to pull in the storage bottle 16 is at the end of the guy rope 7 thin auxiliary rope 20 attached when pulling the guy rope 7 into the storage bottle 17 is drawn in. The auxiliary rope 20 is preferably on an auxiliary winch 21 wound, which is arranged inside the guy support 6, like figure 7 shows. To pull the guy rope back into the storage bottle 16, is the auxiliary rope 20 wound on the auxiliary winch 21.

Of course, the auxiliary rope mentioned does not absorb the guy forces. For this a cable lock 22 is provided, on which the tensioning cable 7 is locked in a form-fitting manner can be. As FIGS. 7 and 8 show, the cable lock 22 is free End of the guy support 6 preferably between the guide roller 19 and the Storage bottle 16 arranged. The cable lock 22 comprises a pivotable locking piece 23, which extends transversely to the direction of the rope Swivel axis is pivotally hinged to the guy support steel structure. about a hydraulic cylinder 24, the locking piece 23 in the running guy rope 7 swung in or out of its barrel. Figure 8 shows the pivoted position, while Figure 9 shows the pivoted, locking Position shows. The locking piece 23 is preferably on its pull-side d. H. 9 left end, pivotally mounted, so that at a failure of the hydraulic cylinder 24 securely held the locked position becomes.

The locking piece 23 catches rope clamps pressed onto the guy rope 7 25 a, the thickening pieces and at predetermined intervals on Guy rope 7 are provided so that the guy rope is pulled out in different Lengths can be locked. When pulling the guy rope 7 is first the locking piece 23 swung out of the rope run, so that if necessary pulled out with pull-out rope clamps 25 over the rope lock can be. If the rope clamp to be caught approaches the rope lock, the cable lock 22 is pivoted in. Catches when you pull out further the locking piece 23 the corresponding cable clamp 25 and comes with this positively engaged. This allows the guy rope to be placed in a precisely defined the desired length.

Basically, the boom is dismantled or dismantled into the transport position proceeded in reverse order. After luffing the boom in its steepest position and the folding of the guy supports can be done with the retraction of the guy rope are started. To pull the rope in first unlocked the cable lock 22 again, d. H. the locking piece 23 pivoted become. For this purpose, the auxiliary winch is first operated to thicken the rope pull out of the cable lock so that the cable lock can be opened. Then the boom is telescoped and the auxiliary winch 21 is operated to Auxiliary rope 20 wind up and thus the guy rope 7 in the storage bottle 16th collect.

According to an alternative embodiment of the invention, which shows Figure 10, can Erecting and spreading the guy support 6 only a single hydraulic cylinder 15 may be provided, on the one hand on the guy support 6 and on the other boom-fixed, in particular on the bearing bracket 10, is articulated. For both swiveling positions to allow the pivot axes 11 and 12 is the hydraulic cylinder 15 articulated at its two ends pivotable. Here for example, a ball joint could be provided. The hydraulic cylinder is preferably 15 gimbaled on both sides.

Each of the two pivot axes 11 and 12 is assigned a pivot axis lock, with the help of which the respective swivel axis can be blocked. This can e.g. B. done by a hydraulically actuated locking bolt is not specifically shown in the drawing. The locking can be done via appropriate Locking arms on the bearing piece 13 take place, the mobility block relative to the bearing bracket 10 or to the guy support 6. figure 10 shows the locking arm 14 of the bearing piece 13 with which the bearing piece 13 fixed to the bearing bracket 10 and thus the pivotability about the first pivot axis 11 can be locked.

The guy supports are erected and spread as follows:

From the transport position shown in FIG. 2, folded onto the articulation shot each of the guy supports 6 is first erected, d. H. around the pivot axis 11 pivoted into an upright position, as shown in Figure 5. For this, the Unlocked pivot axis 11 while the second pivot axis 12 is locked, or remains locked. By retracting the hydraulic cylinder 15, the guy support pivots 6 about the pivot axis 11 until it is erected as shown in FIG Position reached. In this position, the first pivot axis 11 is locked. This can be done in that a locking bolt mounted on the bearing bracket 10 into the locking hole in the locking arm 14 of the bearing piece 13 retracts. The locking arm 14 pivots when the guy support is erected in the appropriate position on the bearing bracket 10 so that it is there aligned with the locking bolt.

To spread the guy supports 6 V-shaped, d. H. to the side of the plane of longitudinal symmetry of the telescopic boom will swing away after locking the first pivot axis 11 unlocks the pivot axis 12. Then can the hydraulic cylinder 15 can be retracted so that the guy support 6 laterally is pivoted out, as shown in Figure 6. It goes without saying that to swing back the guy support 6 in the transport position in reverse order can be proceeded.

In the embodiment shown in Figures 11 to 13, the cable lock 22 is not can only be swung in and swung out, but also in the longitudinal direction of the guy rope 7 movable to bias this. As Figure 11 shows The cable lock 22 here also includes a locking piece 23, which is form-fitting can be locked with a rope clamp 25 pressed onto the guy rope 7. The Locking piece 23 can be moved by means of an actuator which in the drawn embodiment is designed as a hydraulic cylinder 30. Like Figure 11 shows, the locking piece 23 is rigidly attached to the hydraulic cylinder 30, more specifically on the collar portion of the cylinder 31 from which the piston rod 32 of the piston-cylinder unit 30 emerges.

The piston rod 32 is articulated at its end 33 to the steel structure of the guy support 6 hinged. The cylinder 31 of the hydraulic cylinder unit is in a backdrop Guide 34 out, so that the cylinder 31 and attached to it Locking piece 23 travels a predetermined distance when the piston-cylinder unit 30 is operated.

As FIG. 11 shows, the guide 34 comprises a first travel section 35, the transverse or more precisely oblique to the longitudinal direction of the guy rope 7th runs. A second, adjoining travel path section 36 essentially runs parallel to the longitudinal direction of the guy rope 7. The guide 34 is formed as a longitudinal groove-shaped recess in which the cylinder 31 with a Guide bolt can run.

If the hydraulic cylinder unit 30 comes out of its unlocked position, which is shown in FIG is shown actuated, the cylinder 31 moves and thus the locking piece 23 initially obliquely to the guy rope 7. The locking piece 23 is thereby on the guy rope 7, so that there is a rope clamp pressed onto it 25 can capture. This position is shown in Figure 12.

If the hydraulic cylinder 31 is now retracted further, i.e. along the second Traversing path section 36, the guy rope 7 is further into the guy support pulled in and preloaded. Figure 13 shows the fully biased Position. Depending on the travel of the hydraulic cylinder unit 30, a considerable Preload of the guy rope can be effected.

In order to relax the guy rope and unlock the rope lock 23, in reverse order. The actuator arrangement shown is characterized by a particularly compact arrangement. Despite the cramped space can be arranged inside the guy support 6. It understands that the hydraulic guy rope pretension is basically also with a not on the guy support, but on the other end of the guy rope Rope lock could be effected. However, that is particularly preferred Arrangement of the cable lock on the guy support 6.

Claims (13)

Telescopic boom of a crane with an articulation section (2), telescopic sections (3, 4) telescopic from the articulation section (2) and an anchoring (5), the at least one anchoring support (6) mounted on one of the sections (2, 3, 4), as well as a guy rope (7) supported by it, characterized in that a guy rope (7) running from the guy support (6) is provided, which has thickening pieces (25) towards its end, and in that on the guy support (6) Cable lock (22) is provided which can be brought into positive engagement with the thickening pieces (25). Telescopic boom according to the preceding claim, wherein the thickening pieces consist of pressed-on rope clips (25). Telescopic boom according to one of the preceding claims, wherein the Guy rope (7) several spaced-apart thickening pieces (25) has and a rope lock, either the guy rope with a or passes through several of the thickening pieces (23) or one of the thickening pieces (23) captures, is provided. Telescopic boom according to the preceding claim, wherein the cable lock (22) has a movably mounted locking piece (23) which in the and out of the way of the running guy rope (7) is movable, wherein preferably the locking piece (23) is pivotally mounted and a Power lift (24) for actuating the locking piece (23) is provided. Telescopic boom according to one of the preceding claims, wherein to the Guy supports (6), preferably in the interior of the guy supports (6) rope storage (16) for the guy ropes (7), in particular storage bottles (16), in the guy ropes (7) can be retracted are provided. Telescopic boom according to one of the preceding claims, wherein to the Ends of the guy ropes (7) Auxiliary ropes (20) for pulling in the guy ropes (7) are attached, preferably in the interior of the guy supports (6) auxiliary winches (21) for winding the auxiliary ropes (20) are provided. Telescopic boom according to the preceding claim, wherein two guy supports are provided, which consist of an essentially parallel, on one of the shots (2, 3, 4) folded transport position in a erected operating position in which the guy supports (6) are spread out in a V-shape are, are pivotable, and being over each of the guy supports Guy rope (7) runs. Telescopic boom according to one of the preceding claims, wherein the guy supports (6) are free from cross-connections. Telescopic boom according to one of the preceding claims, wherein the Cable lock (22) by means of an actuator (30), in particular a hydraulic cylinder, movable in the longitudinal direction of the rope and the guy rope (7) through Movement of the cable lock (22) can be tensioned. Telescopic boom according to the preceding claim, wherein the cable lock (22) with the guy rope (7) can be locked frictionally. Telescopic boom according to claim 9, wherein the cable lock with the guy rope (7) can be positively locked. Telescopic boom according to one of the preceding claims, wherein the Cable lock (22) is guided in a preferably link-like guide (34) such that the cable lock (22) along a first adjustment path section (35) can be brought into and out of engagement with the guy rope (7) and along an adjoining second adjustment path section (36) in the longitudinal direction of the rope is movable in the locked state. Telescopic boom according to the preceding claim, wherein the hydraulic cylinder (30) of the actuator with one end (33), preferably with one Piston rod, pivoted to the guy support (6), and with his to be actuated section (31), preferably with the cylinder whose collar carries the cable lock (22) and is guided in the guide (34).

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