EP0661233A1 - Grue à tour - Google Patents

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Publication number
EP0661233A1
EP0661233A1 EP94111263A EP94111263A EP0661233A1 EP 0661233 A1 EP0661233 A1 EP 0661233A1 EP 94111263 A EP94111263 A EP 94111263A EP 94111263 A EP94111263 A EP 94111263A EP 0661233 A1 EP0661233 A1 EP 0661233A1
Authority
EP
European Patent Office
Prior art keywords
articulated
boom
piece
tower
link
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94111263A
Other languages
German (de)
English (en)
Other versions
EP0661233B1 (fr
Inventor
Horst Dipl.-Ing. Zerza
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Werk Biberach GmbH
Original Assignee
Liebherr Werk Biberach GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Liebherr Werk Biberach GmbH filed Critical Liebherr Werk Biberach GmbH
Publication of EP0661233A1 publication Critical patent/EP0661233A1/fr
Application granted granted Critical
Publication of EP0661233B1 publication Critical patent/EP0661233B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
    • B66C23/344—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes adapted for transport purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
    • B66C23/348—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes the erection being operated by jacks

Definitions

  • the invention relates to a tower crane with a superstructure rotatably mounted about a vertical axis, on which a lower tower section connected to the upper tower section is articulated about a horizontal transverse axis, both of which are connected to one another by a toggle mechanism, with one the upper tower section with the link connecting the uppercarriage and with a hydraulic cylinder articulated on the lower tower section, the piston rod of which is articulated on the toggle mechanism in the area of the knee joint.
  • a known tower crane of this type meets the requirement in practice to be able to move it easily and quickly from its transport position into its operating position and, conversely, to be able to quickly fold it from its operating position back into its transport position.
  • the articulated lower and upper tower sections, of which the lower tower section is articulated to the superstructure are opened from their horizontal, folded position, in which the two tower sections lie one on top of the other, that the hydraulic cylinder via the knee joint mechanism Spreads tower pieces relative to each other by about 180 degrees into the extended position, the handlebar of this spreading movement a rotational movement of the lower tower piece by about Overlaid 90 degrees.
  • boom link piece and a boom extension piece articulated to it are hinged to the top of the tower, these can also be spent at the same time as the mast is being erected from a position folded one above the other in the transport position into its operating position by means of a guy rope running over boom guy supports.
  • the known crane enables it to be erected quickly from the transport position into the operating position and, conversely, to fold up into the transport position.
  • the object of the invention is to improve the known crane still further with regard to its quick and easy erection and re-positioning in the transport position.
  • a support frame pivotable about a transverse axis is articulated on the side of the superstructure opposite the lower tower section, which is provided with a steering axis pivotable about a vertical axis, that on the underside of the lower tower section lying approximately horizontally in the transport position, a rigid axle provided with wheels is fastened, and that the supporting frame is held in its road driving position by a linkage connected to the lower tower section, which also supports the supporting frame when the lower tower section is pivoted upward by the hydraulic cylinder pivoted upwards so that the platform is lowered on the ground.
  • this crane according to the invention no special carriage needs to be provided for road transport.
  • the two axles moving the crane are on the one hand as a rigid axle on the lower tower section and on the other as a steering axle on the Support frame attached to the front of the superstructure.
  • the steering part of the steering axle is provided with a drawbar, via which the movable crane unit can then be attached to a truck. If the crane according to the invention is to be moved from its transport position into its operating position, it is only necessary to swing out the usual support arms of the platform and then to erect the tower by means of the hydraulic cylinder, with the linkage then exerting a pushing force on the supporting frame carrying the steering axle, so that this is pivoted up about its transverse axis and at the same time the platform is lowered on the ground.
  • the linkage consists of two hinged rods, the outer ends of which are articulated to the support frame on the one hand at the top of the lower tower section and on the other hand at a distance below the articulated connection of the support frame to the superstructure, the rod connecting joint is guided such that the support frame is folded up like a crank.
  • a particular problem with erecting and dismantling the crane is ballasting the superstructure with the required ballast weight, which is transported by a special transport vehicle, for example the truck pulling the crane as a trailer.
  • Another object of the invention is therefore to design the crane so that it can ballast itself.
  • this task is accomplished with a tower crane the preamble of claim 1 solved in that an A-bracket is pivotally hinged to the rear of the upper end of the upper tower section, with two articulated rods, the ends of which are on the one hand at the outer end of the A-bracket and on the other at the upper Tower section are articulated below the joint of the A-frame, a four-joint system forms that a hydraulic cylinder is provided for pivoting the four-joint system and in the area of the outer end of the A-frame, a load suspension sling is arranged. With this load suspension sling, the ballast can be removed from a transport vehicle and placed on the superstructure.
  • the lifting and lowering movement is brought about by the hydraulic cylinder pivoting the two tower sections relative to one another, with kinematics being provided for the A-frame to perform an essentially vertical movement when the tower sections are pivoted relative to one another.
  • the horizontal movement is effected by swiveling the A-frame.
  • the A-frame itself forms a support for the boom guy rope when the crane is fully swung out.
  • the inner rod is expediently mounted on a bracket which is fastened to the upper tower section and is provided with a lever arm which is extended beyond the joint on the bracket and on which the hydraulic cylinder acts to pivot the four-bar system.
  • the A-frame can be fork-shaped with arms that can be folded in and out, at the ends of which two load suspension hangers are attached.
  • the A-frame can also be rigid in itself, in which case a lever or a lever system, which can be pivoted by a hydraulic cylinder, is mounted on the upper end region of the upper tower section is the free end of which carries a load suspension sling.
  • a particular problem with self-erecting cranes, at the top of which a jib extension piece is articulated, to which a jib extension piece is articulated, is to pivot the jib extension piece by 180 degrees to the jib attachment piece during the erection process, so that both from an overlying position be brought into an extended position.
  • a complicated solution to this problem is known for example from European patent publication 0 536 060.
  • the object of the invention is to provide a device according to the preamble of claim 1, in which during the erection process of the crane, the boom extension piece folded onto the jib articulation piece can be spent in an extended position thereon.
  • this object is achieved in a crane of the generic type in which a boom link piece is articulatedly connected to the top of the tower, to which a boom extension piece is articulated in the region of the upper boom, in that a link is provided at the end regions of the articulated top booms is articulated, the other ends of which are connected to one another in an articulated manner, and that one end of a hydraulic cylinder is articulated between the articulations of the link articulated on the boom articulation piece, the other end of which is articulated on the boom articulation piece.
  • This type of linkage which is connected to one another in an articulated manner, creates a transmission which is moved by the hydraulic cylinder and by means of which the boom link piece can be pivoted by 180 degrees around the joint located in the region of the upper straps between an extended position and a folded position.
  • the articulated on the boom articulation piece Handlebars made of an essentially triangular plate, at the corner points of which the joints are located.
  • the hydraulic cylinder can be conveniently hinged to the approximately triangular handlebar without the hydraulic cylinder having to sweep large swivel angles when the piston rod is extended and retracted.
  • the boom link piece and the boom extension are laterally provided with joint parts which can be coupled together and which allow the boom extension piece to be pivoted sideways relative to the boom link piece.
  • Such folding down is necessary, for example, in order to reduce the transport height of the crane unit to be transported.
  • the detachable joint parts are coupled together and then the connection of the jib pieces is released, so that the jib extension piece can be folded sideways onto the jib articulation piece.
  • the link articulated to the boom articulation piece consists of two parts which can be pivoted about an articulated axis, of which the hydraulic cylinder is articulated to the part articulated to the boom articulation piece and the other part articulated to the other articulation piece is connected that the joint connecting the boom articulation piece with the boom extension piece about a transverse axis is connected to one of the boom pieces by another articulation which can be pivoted about a longitudinal axis, and that the pivot axes are aligned with one another such that the pivot axis of the articulation element can be pivoted about a longitudinal axis Joint in the folded position of the boom extension piece of the boom extension piece with the pivot axis of the pivotable parts of the linkage articulated on the boom linkage.
  • the boom extension piece in from its folded position on the boom link, fold it sideways on the boom link without having to loosen any connections between the boom sections.
  • the piston rod of the hydraulic cylinder is articulated to an intermediate lever which is articulated on the first part of the link articulated on the boom articulation piece and which is articulated via a space control arm to an angled portion of the second part of the articulation, that the intermediate lever on the first part of the handlebar is blocked until the pivot axes are aligned, and that then the hydraulic cylinder swivels the boom linkage by the space control arm over the aligned axes by pivoting the intermediate lever.
  • the blocking device can expediently consist of a pin which engages and rotates relative to the intermediate lever and is provided with a cam, which, only after the extension piece of the boom has been folded onto the extension link piece, allows the intermediate lever to pivot, concentrically curved to the pivot axis thereof Elongated hole of the first part of the handlebar runs in. So is the boom extension piece on the boom pivot piece, the handlebar has turned so far that the cam on the pin of the intermediate lever no longer blocks this relative to the first part, so that the pin can run into the slot and the intermediate lever pivoted by the hydraulic cylinder causes the boom extension piece to fold down over the space control arm.
  • the boom is held in its respective pivot position with respect to the tower by a rear guy rope that runs over rear guy supports.
  • the angle position of the boom can therefore be adjusted by pulling in or extending the guy rope.
  • Another object of the invention is to enable simple angle adjustment of the boom.
  • this object is achieved in a crane of the generic type with a boom articulated to the top of the tower, which is braced against the superstructure by means of a guy rope and / or guy linkage, which is guided over guy supports, in that the guy rope via pulleys of the superstructure to one Fixed point on which is released from the lower tower section hydraulic cylinder, so that the boom can be pivoted over the hydraulic cylinder.
  • the trolley must do additional lifting work in the trolley operation, which must be applied by the trolley rope. To prevent overloading, special safety devices must be provided.
  • the output shaft of the geared motor is coupled to the drive pin of the trolley winch, that the flange of the geared motor is supported via a compression spring on the wall supporting the bearing of the drive pin and that a limit switch and on the wall on the wall Flange an associated actuator are arranged.
  • the compression spring forms, as it were, a torque support, the compression spring being compressed in accordance with the force acting on the trolley in the axial direction of the boom.
  • the limit switch and the actuator can thus be arranged at a distance from each other that a shutdown takes place in the event of an overload.
  • limit switches with actuators can also be provided so that different loads can be set. If several limit switches are provided, limit switches with telescopic contacts are provided which can be pushed together so that other activated limit switches can be actuated.
  • the flange can expediently be supported by a buffer on a stop on the wall.
  • the upper fixed point of the hoisting rope carries a crane hook which can be locked onto a block in the area of a deflection roller provided on the jib tip in order to lock it during trolley travel operation.
  • the cat and the load hook on the cat can be locked on the boom so that the hook forming the fixed point can be lowered and raised by the lifting rope.
  • the crane according to the invention can be operated like a crane with a luffing jib.
  • the crane shown in FIGS. 1 and 2 in its operating position, has a lower platform 1, which is supported on the ground by means of fold-out supports 2 and foot pieces connected to them.
  • the superstructure 3 is connected to the platform 1 via a rotary connection with a vertical axis of rotation.
  • the ballast weight 4 is located on a cantilevered part of the upper carriage 3.
  • the lower tower section 5, which is articulated to the upper tower section 6, is articulated on an opposite, cantilevered part of the upper carriage.
  • the boom articulation piece 7 is articulated to the top of the tower and is articulated to the boom extension piece 8. In the area of the articulated connection between the boom pieces 7 and 8, the upper end of the boom guy rope 9 is attached.
  • the boom guy rope runs over the guy support 10 and the A-frame over guide rollers 12, 13 mounted on the superstructure to its fixed point 14 at the lower end of the hydraulic cylinder 15.
  • the crane In the position shown in FIG. 3, the crane is in its concertina-folded transport position, in which the lower tower section 5 is in an approximately horizontal position and the upper tower section 6 is folded into a parallel position on the lower tower section 5.
  • the boom link piece 7 and the boom extension piece 8 are located also folded up on the upper tower section, so that there is a compact transport unit, which is shown schematically in the rear view of FIG. 5.
  • the boom extension piece In the transport position, the boom extension piece can also be folded sideways onto the boom articulation piece 7 in the manner shown in FIG. 5.
  • the folded position of the boom extension piece is designated 8 '.
  • a rigid axle 17 carrying wheels 16 is attached to the underside of the tower section pivoted into a horizontal position.
  • the fork-shaped legs 19 of a support frame 20 are mounted on the opposite front region of the superstructure so that they can pivot about a transverse axis 18.
  • This support frame 20 is provided with a steering axle 21 which carries wheels and which is pivotably mounted about a vertical axis 22 in the front region of the support frame 20.
  • the pivot axis is provided with a steering drawbar 23 which can be coupled to a truck 24.
  • the lower tower section 5 In its horizontal transport position, the lower tower section 5 has on its upper side a bracket 25 which is located next to the joint 26 connecting the lower tower section to the superstructure 3.
  • a first push rod 27 is articulated to the bracket 25, which is articulated by the joint 28 to a second push rod 29, the end of which is articulated in the transport position below the pivot axis 18 in the articulation 30 to the legs 19 of the support frame 20.
  • the joint 30 is guided in a straight line in a guide 31 in such a way that the second push rod 29 can execute a crank-like movement relative to the first push rod 27.
  • the support frame 20 can also by a bolt connection 32 against the uppercarriage 3 must be bolted and secured.
  • the support frame 20 is also pivoted upward by the connecting rods 27, 28 forming coupling rods.
  • the second push rod 29 forms part of a crank mechanism, by means of which the support frame 20 with the drawbar is folded onto the handlebar 34 in the operating position in the manner shown in FIGS. 7 and 8. During this pivoting operation of the lower tower section 5 and the support frame 4, the supports of the platform 1 are lowered onto the floor.
  • the tower is erected in the manner shown in FIGS. 20 to 22 by the hydraulic cylinder 15.
  • the lower tower section 5 and the upper tower section 6 are articulated to one another by the laterally arranged joint 36.
  • the lever 36 is articulated in the joint 35 at the upper end region of the lower tower section 5, and the lever 38 is articulated in the joint 37 in the lower region of the upper tower section 6.
  • the levers 36 and 38 are connected by the knee joint 39 to form a toggle lever system.
  • the pair of levers 35 are connected to each other by a cross bar 40 to which the piston rod 41 of the cylinder 15 is articulated.
  • the lower end of the cylinder 15 is connected to the lower tower section by the detachable joint 42.
  • the link 34 is articulated in the joint 43 to the upper tower section 6, the lower end of which is articulated in the joint 44 to a bearing block located on the superstructure 3. If the hydraulic cylinder 15 is extended, the mast consisting of the lower and the upper tower section 5, 6 is moved out of its horizontal transport position erected into its approximately vertical operating position, the knee joint system causing the tower sections to pivot by approximately 180 degrees, while the link 34 pivots the tower sections increasingly moved into an extended position into their vertical position.
  • the upper tower section 6 has a bearing block 45 on the rear of the tower tip, to which the legs of the A-bracket 47 which extends the bearing block 45 are articulated in the joint 46 (FIG. 14). Below the bearing block 45 there is a second bearing block 48, to which the link 50 is articulated in the joint 49.
  • the handlebar 50 is connected in an articulated manner to the upper end region of the A-frame 47 via a coupling rod 51.
  • the handlebar 50 is extended beyond its hinge axis 49 by an actuating lever 52 to which the piston rod of a hydraulic cylinder 53 is articulated, which is articulated to the upper tower section 6 by the hinge 54.
  • the A-frame 47 thus forms with the handlebar 50 and the coupling rod 51 a four-bar system, which between its position shown in FIG. 12, folded to the upper tower section 6 and its position shown in FIG. 15, in which the A-frame 47 is in its guy position, is pivotable.
  • Foldable and retractable support arms 55, 56 are hinged to the tip region of the guy stand, at the ends of which chains or other load-carrying means are arranged.
  • the ballast weights can be removed from the truck and placed on the superstructure 3 in the manner shown in FIGS. 9 to 11.
  • a first embodiment of the device pivoting the jib pieces relative to one another will now be explained with reference to FIGS. 34 to 36.
  • the boom articulation piece 7 and the boom extension piece 8 are connected to one another in the region of their upper chord by a joint 60.
  • a link 63 consisting of a three-armed plate is articulated in the joint 62 on the end region of the upper flange 61 of the boom link piece 7.
  • the piston rod of a hydraulic cylinder 65 is articulated on the link 63 in the joint 64 and is connected by the articulated connection 66 to the lower flange 67 of the boom articulation piece 7.
  • the link 63 is connected by the link 68 to the link 69 forming a coupling member, the other link 70 of which is connected at a distance from the link 60 to the single-stranded upper flange of the extension piece 8.
  • the triangular link 63 forms a crank-like member in which the joint 62 is approximately in the tip of the triangle and the joints 64 and 68 are located in the end regions of the base.
  • the links 63 and 69 form a transmission with the hydraulic cylinder 65, which is capable of pivoting the boom extension piece 8 by 180 degrees around the joint 60.
  • 34 shows an illustration in which the boom extension piece 8 is folded onto the boom articulation piece 7. This position corresponds, for example, to the transport position shown in FIG.
  • the boom extension piece is not folded sideways into the boom pivot piece.
  • the cantilever pieces have triangular lattice profiles in cross section, the joint 60 being located in the region of the upper chord formed only by a spar.
  • the boom extension piece 8 has been folded into an extended position relative to the boom link piece 7.
  • the boom guy rope 9 or guy linkage is in its guying angular position to the boom articulation piece 7.
  • the kinematics is selected so that in the extended position shown in FIGS. 35 and 36, the piston rod of the hydraulic cylinder 65 is fully retracted so that it is protected against environmental influences.
  • the hydraulic cylinder 65 only executes a small swivel angle between its swung-out and collapsed positions.
  • the link 76 which can be pivoted about the joint 75 located in the region of the upper chord of the boom articulation piece 7 is formed in two parts. It consists of a first angled part 77, one arm of which is mounted in the joint 75 and the other arm in the joint 78 engages the piston rod of the hydraulic cylinder 65.
  • a forked bracket 79 is fastened, in which the second part 81 is pivotally mounted about the pivot axis 80, at the tip of which the link 83 is articulated in the articulation 82, the other end of which in the articulation 84 in the region of the upper chord of the cantilever Extension piece 8 is articulated.
  • the hinge 85 can additionally be pivoted by the hinge 86 about an axis 87 running parallel to the center line of the boom articulation piece 7. If the boom extension piece 8 is folded onto the boom pivot piece 7 in the manner shown in FIG. 25 in such a way that the two lie approximately parallel to one another, the axes 80 and 87 are aligned with one another, so that the boom extension piece 8 is about the Axles 80, 87 can be folded sideways to the extension piece 7 in the manner shown in FIG. 5.
  • the extension arm piece 8 In order to stabilize the articulation 85, which can be pivoted about the axial articulation axis 87, in the pivoted-out position shown in FIG. 24, the extension arm piece 8 is provided in the region of its upper chord with an extension 91 which extends it and is provided with a detent depression 90. in the extended position shown in FIG. 24 a stabilizing nose 92 engages, which is molded onto the joint bushing of the joint 87.
  • the piston rod of the hydraulic cylinder 65 engages in the joint 95 of an auxiliary lever 96, which is articulated on the handlebar part 77 by the joint 97 .
  • the auxiliary lever 95 is provided at its free end with a ball head 98 on which a space guide 99 is articulated.
  • the other end of the space arm 99 is pivotally mounted on an angled part 100 of the second part 81.
  • the auxiliary lever 96 has a steering pin 101 fastened to the piston rod, which is provided with a cam 102 widening it on one side.
  • This pin 101 engages in a keyhole-like elongated hole 103 of the part 77, in such a way that during the overrun phase of the hydraulic cylinder 65 the rounded, cam-like part 2 is located in the larger diameter bore 104 of the keyhole-like elongated hole 3, which concentrically the pivot axis 97 of the auxiliary lever 96 is curved.
  • the pin 101 is thus blocked in the circular section 104 of the elongated hole 103.
  • the pin exerts tension on the bore part 104 of the elongated hole 103, so that the pin 101 does not strives to run into the concentrically curved part of the elongated hole 103.
  • the cam 102 ' can run into the concentrically curved part of the elongated hole 103' in the manner shown in FIG. 27.
  • the hydraulic cylinder 65 is thus capable of the auxiliary lever 96 relative to the part 77 to pivot so that the space control 99 is pivoted by the auxiliary lever 96 and the boom extension piece about the aligned axes 80, 87 folds sideways.
  • FIGS. 37 to 39 show the trolley cable drum 114 mounted in bearings 110, 111 of side walls 112, 113.
  • the drive pin 115 of the trolley cable drum 114 is connected to the driven pin of the geared motor 116.
  • the flange 117 of the geared motor 116 is screwed to a ring 118 which is freely rotatable with respect to the side wall 112.
  • the ring 118 has an approximately radially projecting nose 119.
  • the side wall 112 is provided with an abutment 120 opposite the nose 119.
  • a pressure spring 121 is clamped between the nose 119 and the abutment 120 in the manner shown in FIG. 39.
  • a retaining part 122 for a rubber buffer 123 is screwed to the ring 118 and, in the unloaded state of the cable drum 114, is pressed against an abutment 124 which is fixedly arranged on the side wall 112.
  • the compression spring 121 forms a torque support for the geared motor 116.
  • the compression spring 121 is compressed more depending on the load on the cable drum 114.
  • Two switches 126 are arranged next to one another on the abutment part 120 and can be actuated by adjustable plungers 127, 128 provided with plates, which are held on the nose 119.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Control And Safety Of Cranes (AREA)
EP94111263A 1993-10-21 1994-07-19 Grue à tour Expired - Lifetime EP0661233B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9316113U DE9316113U1 (de) 1993-10-21 1993-10-21 Turmdrehkran
DE9316113U 1993-10-21

Publications (2)

Publication Number Publication Date
EP0661233A1 true EP0661233A1 (fr) 1995-07-05
EP0661233B1 EP0661233B1 (fr) 2001-12-19

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EP94111263A Expired - Lifetime EP0661233B1 (fr) 1993-10-21 1994-07-19 Grue à tour

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EP (1) EP0661233B1 (fr)
DE (2) DE9316113U1 (fr)

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CN111508309A (zh) * 2020-06-02 2020-08-07 中国建设教育协会 一种动臂式教学专用塔式起重机
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FR2761971B1 (fr) * 1997-04-11 1999-05-28 Potain Sa Grue a montage automatise a fleche pliable, avec repliage lateral pour transport
FR2761970B1 (fr) * 1997-04-11 1999-05-28 Potain Sa Dispositif de relevage de mat pour grue a tour telescopique
FR2796632B1 (fr) 1999-07-22 2001-08-24 Potain Sa Dispositif de repliage d'une fleche de grue a elements emboitables
DE29916410U1 (de) * 1999-09-17 2000-04-27 Liebherr-Werk Biberach GmbH, 88400 Biberach Gelenkig miteinander verbundene, im Querschnitt dreieckige Gitterträger
FR2929606B1 (fr) 2008-04-02 2010-09-10 Manitowoc Crane Group France Fleche de grue a tour avec mecanisme de pliage-depliage
CN103130104A (zh) * 2011-12-01 2013-06-05 上海市基础工程有限公司 用于钢桁架梁桥悬臂施工的桥梁吊机
EP2711328B1 (fr) * 2012-09-14 2015-05-13 Gru Comedil s.r.l. Flèche pliable pour grue et ladite grue
DE102020128161A1 (de) * 2020-10-27 2022-04-28 Liebherr-Werk Biberach Gmbh Turmdrehkran

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FR1463099A (fr) * 1965-10-26 1966-12-23 Potain & Cie Ets F Perfectionnements aux grues télescopiques repliables
DE1531179A1 (de) * 1966-09-28 1969-11-27 Potain & Cie Ets F Zusammenklappbarer Kran und Verfahren zum Aufrichten desselben
FR2336341A1 (fr) * 1975-12-22 1977-07-22 Cadillon Roger Procede de mise en place rapide d'une grue de batiment
FR2546496A1 (fr) * 1983-05-25 1984-11-30 Cattaneo Spa Grue articulee a redressement automatique

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Publication number Priority date Publication date Assignee Title
FR1463099A (fr) * 1965-10-26 1966-12-23 Potain & Cie Ets F Perfectionnements aux grues télescopiques repliables
DE1531179A1 (de) * 1966-09-28 1969-11-27 Potain & Cie Ets F Zusammenklappbarer Kran und Verfahren zum Aufrichten desselben
FR2336341A1 (fr) * 1975-12-22 1977-07-22 Cadillon Roger Procede de mise en place rapide d'une grue de batiment
FR2546496A1 (fr) * 1983-05-25 1984-11-30 Cattaneo Spa Grue articulee a redressement automatique

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ITTO20110887A1 (it) * 2011-10-04 2013-04-05 Gru Dalbe Srl Base di supporto per gru auto-montante e gru auto-montante comprendente una base di supporto siffatta
ITTO20110886A1 (it) * 2011-10-04 2013-04-05 Gru Dalbe Srl Gru auto-montante
US20140093346A1 (en) * 2012-10-01 2014-04-03 Randy Kent Covering System
US9216798B2 (en) * 2012-10-01 2015-12-22 Marine Concepts, Llc Covering system
US10239583B2 (en) 2012-10-01 2019-03-26 Marine Concepts, Llc Covering system
US11840860B2 (en) 2017-06-09 2023-12-12 Marine Concepts Acquisition, Llc Retractable RV and trailer cover
CN111508309A (zh) * 2020-06-02 2020-08-07 中国建设教育协会 一种动臂式教学专用塔式起重机

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EP0661233B1 (fr) 2001-12-19
DE59410015D1 (de) 2002-01-31

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