EP1398291A1 - Grue à montage automatique avec une tour repliable et télescopique et une flèche repliable - Google Patents

Grue à montage automatique avec une tour repliable et télescopique et une flèche repliable Download PDF

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Publication number
EP1398291A1
EP1398291A1 EP20030077915 EP03077915A EP1398291A1 EP 1398291 A1 EP1398291 A1 EP 1398291A1 EP 20030077915 EP20030077915 EP 20030077915 EP 03077915 A EP03077915 A EP 03077915A EP 1398291 A1 EP1398291 A1 EP 1398291A1
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EP
European Patent Office
Prior art keywords
arm
hinged
tower
main portion
portions
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.)
Withdrawn
Application number
EP20030077915
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German (de)
English (en)
Inventor
Piero Bertinotti
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.)
San Marco International Srl
Original Assignee
San Marco International Srl
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Filing date
Publication date
Application filed by San Marco International Srl filed Critical San Marco International Srl
Publication of EP1398291A1 publication Critical patent/EP1398291A1/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • B66C23/342—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes with telescopic elements

Definitions

  • the present invention refers to a self-mounting tower crane with a fold-away and telescopic tower and an arm with many fold-away portions.
  • Self-mounting tower cranes having a composite structure in which the vertical element known as the tower is made up of a pair of portions of structure hinged together and the horizontal element, known as the arm, is also made up of one or more portions hinged together.
  • the portions of the vertical element, with the crane folded up, are horizontal and compact one on top of another, whereas with the crane mounted they are vertical and aligned with one another to realise the tower of the crane.
  • the portions of the horizontal element, with the crane folded up are horizontal and folded upon themselves and over the portions of the vertical element, whereas, with the crane mounted, they are horizontal and aligned with one another to realise the arm of the crane.
  • the portions of arm cannot have a maximum length that much exceeds the length of the portions of tower whereas the overall height of the portions of tower and of the portions of arm lying on top of each other cannot exceed a certain height, thus limiting the number of the heights of the individual portions of arm that can be placed on top of each other.
  • the crane of the present invention has a tower with a composite structure realised in at least one pair of portions hinged together, consisting of structural elements or blocks with a square or rectangular section, and a third portion slotted into the upper portion of the hinged pair also consisting of a structural element or block with a square or rectangular section and having the possibility of being extracted when the two hinged portions are vertical and aligned so that the upper end of the tower thus realised can reach a height greater than the height that can be reached with just the pair of hinged portions.
  • the substantially reduced height of the individual portions of the arm and their particular shape allow, with the crane folded up, a number to be laid over each other such as to allow, with the crane mounted, a substantial arm length to be reached which is greater than that which can be reached with other known cranes of the same type.
  • the extracting of the third portion of tower takes place after the alignment in vertical position of the pair of hinged portions and only in such an extracting step there is the lifting of the arm into the position of use, the purpose of reducing the flexing stresses in the two hinged portions of tower and in the members used for the mounting of the tower is achieved.
  • a crane according to the invention is constructed with a tower as described above with an arm in many portions having sections of limited height, supported by screw-down jacks and ties so that at least three main portions of the arm, with the crane dismounted with arm and tower folded up, can be laid on top of each other and with two hinged tower elements, so that the overall height of the crane, dismounted and folded upon itself, is relatively contained and such as not to jeopardise the possibility of transporting it.
  • FIG. 1 It can be seen, in particular in figure 1, how the crane is in completely folded position with the lower base 10 rested upon the ground.
  • Figures 2 and 3 represent the crane with the tower partially mounted up to that which is shown in figure 4 where the two portions of tower are aligned and a third portion is still completely slotted in them.
  • Figure 5 also shows the two portions of tower aligned and the third portion completely extracted, whereas the portions of the arm are partially folded upon themselves.
  • Figures 6, 7, 8 and 9 are schematic views of the crane according to the invention with the arm, the ties and the tip in three successive steps of unfolding until that which is shown in figure 10, where the crane completely mounted in work position, is reached.
  • Figures 11 and 12 represent the articulated joint between the first main portion of the arm, the two intermediate secondary portions and the second main portion of the arm, respectively, in an intermediate step of aligning the arm and with the arm actually aligned.
  • Figures 13 and 14 represent the articulated joint between the second main portion of the arm, the two secondary intermediate portions and the third main portion of the arm in an intermediate step of aligning the arm and actual alignment of the arm, respectively.
  • Figures 15 and 16 show the terminal of the arm in the partially folded position which it takes up when the crane is dismounted and in the unfolded position aligned with the third main portion of the arm which it takes up when the crane is mounted or in use step.
  • the invention refers to a self-mounting tower crane with a composite structure which has the portions of the tower and of the arm hinged together at horizontal pivots indicated with 11, 12, 13, 14, 15, 16, 17, 18, 19 and 20. It is made up of a tower consisting of two portions 21 and 22, hinged together at 12, and a third portion 23 slotted into - and able to be extracted from - the upper portion 22 of the two hinged portions.
  • the load arm 50 is made up of a first main portion 24 one of the ends of which is hinged at 13 at the level of its longerons below the upper end of the extractable portion of the tower 23, of a first secondary portion 25 of relatively short length one of the ends of which is hinged at 14 at the level of its longerons below the free end of the first main portion 24, of a second secondary portion 26 of relatively short length one of the ends of which is hinged at 15 at the level of its longerons below the free end of the first secondary portion 25, of a second main portion 27 one of the ends of which is hinged at 16 at the level of its longerons below the free end of the second secondary portion 26, of a third secondary portion 28 of relatively short length one of the ends of which is hinged at 17 at the level of its longerons below the free end of the second main portion 27, of a fourth secondary portion 29 of relatively short length one of the ends of which is hinged at 18 at the level of its longerons below the free end of the third secondary portion 28, of a third main portion 30 one of the ends of
  • All of the portions of the arm have a substantially reduced height in order to be able to be placed on top of each other, with the crane dismounted, in a number of at least three main portions; only the first main portion 24 has, in its front part near to the hinge 14, a greater height in order to also allow the installation of the translation ratiomotor of the trolley.
  • the lower portion of the tower 21 is in turn hinged at 11 in a lower end thereof to a base structure, per se known and wholly indicated with 32, equipped with a rotation fifth wheel 33, said fifth wheel being integral with the lower base 10.
  • the base structure 32 usually foresees command means of the unfolding and of the refolding of the entire crane, not specifically indicated, which act through the flexible tie 34 which extends along the side of the tower essentially on the opposite side to the arm and the flexible ties 35, 36, 39, 118 and 119 which extend above the portions of the arm.
  • the ties form, with the portions of the base structure of the structure of the crane, an articulated quadrilateral.
  • the flexible tie 34 In the intermediate position represented in figure 2 the flexible tie 34, consisting of one or more portions, is hinged at 37 to the base structure 32, rests upon the large roller 38 placed at the end of a tip 40, said tip being rigidly connected to the upper end of the portion of tower 23, and rests upon a roller 41 hinged to the end of the first portion of arm 24 at the level of the upper longeron.
  • the other end of the tie 34 is connected in a hinged manner to the ties 35 and 39 and to the end of the tip 42, said tip in turn being connected in a hinged manner at 43 to the upper end of the tower 23.
  • the tie 34 When, through the progressive lifting of the two portions of tower 21 and 22, the tie 34 goes into traction, the tip 42 tends to rotate about the hinge 43 taking the tie 35 into traction until it is taut, said tie consisting of three portions of which the first 44 of a short length is connected to the tip 42, the second portion 46 of a length substantially equal to the length of the tip 42 is connected at 45 to the first portion 44, the third portion 48 is connected at 47 to the second portion 46 and, at the other end, is connected at 49 to the first main portion of the arm 24 at the height of the upper longeron of the portion.
  • the tie 34 When the tie 34 is taut through the effect of the rotation of the tip 42 it is suitable to fold the second portion 27 of the arm and the third portion 30 of the arm until they are rested upon the tie 35.
  • the portion of tower 23 is completely slotted in the portion of tower 22; the load arm 50, hinged at 13 to the upper end of the portion of tower 23, is arranged vertically and almost resting upon the portions 21 and 22 of the tower; the ties 34 and 35 are taut.
  • the portion of tower 23 is extracted from the hinged portion of tower 22, as indicated in figure 5, and the command devices of such extracting are illustrated in the two patent applications nos. MI2000A002661 and MI2000A001062 quoted above.
  • the traction applied by the ties 34 and 35 makes the load arm 50 rotate about the hinge 13, said load arm 50 rising until the horizontal or slightly raised position is reached towards the opposite end of the tower indicated in figure 5, when the portion of tower 23 is completely extracted from the portion of tower 22; conventional devices ensure the locking of the portion of tower 23 in the position of maximum extracting in which the crane can be used to lift loads.
  • an end of a screw-down jack 54 is hinged at 66, the other end of the screw-down jack 54 being hinged at 55 to the end of the flexible tie 36 and to the end of the flexible tie 39, consisting of a metal cable.
  • the tie 39 is integral with the end 52 of a screw-down jack 51, the other end of said screw-down jack being fixed in a hinging manner at 53 to the portion 48 of the tie 35.
  • a plate 57 carrying a slot in a suitable position is integral with the first secondary portion 25 of the arm, whereas a plate 58 carrying a hole in a suitable position is integral with the second secondary portion 26 of the arm.
  • a jack 90 inserted in the hole of the plate 58 and in the slot of the plate 57 allows the first secondary section 25 of the arm and the second secondary section 26 of the arm to rotate about the hinge 15 in the slack allowed by the jack 90 inserted in the slot of the plate 57 and in the hole of the plate 58.
  • a hydraulic actuator 60 is hinged at 61 to the upper structure of the first main portion of the arm 24, the other end of the hydraulic actuator 60 being hinged at 59 to the plate 57 of the first secondary portion 25 of the arm.
  • a second hydraulic actuator 62 is hinged at 64 to the second main portion of the arm 27, the other end of the hydraulic actuator 62 being hinged through the jack 90 to the plate 58 of the second secondary portion 26 of the arm.
  • a pair of connecting rods of different lengths 68 and 70 are hinged together at 69, the other end of said connecting rod 70 being hinged at 71 to the first main portion of the arm 24 and the other end of said connecting rod 68 being hinged at 67 to the plate 57 of the first secondary portion of the arm 25.
  • Figures 6 and 7 show two intermediate steps of the alignment of the first secondary portion 25 of the arm 50 to the first main portion 24 of the arm 50, of the alignment of the second main portion 27 with the second secondary portion 26 of the arm 50 and of the alignment of the portions 26 and 27 with the portions 24 and 25.
  • the thrust exerted by the hydraulic actuator 60 makes the first secondary portion 25 of the arm rotate about the hinge 14 arranged at the end of the first main portion 24 of the arm; in the same way, the thrust exerted by the actuator 62 makes the second main portion 27 of the arm rotate about the hinge 16 arranged at the end of the second secondary portion 26 of the arm.
  • Rotating the first secondary portion 25 of the arm about the hinge 14 determines the rotation of the second secondary portion 26, said second secondary portion 26 being connected, in a hinged manner at 15, to the first secondary portion 25 and with the possibility of rotating about said hinge 15 in the slack allowed by the jack 90 inserted in the slot of the plate 57 and in the hole of the plate 58.
  • the connecting rods 68 and 70 rotate about the hinge 69 which connects them to an end, whereas the other end of the connecting rod 68 connected at 67 to the upper part of the secondary portion 25 of the arm displaces following the rotary movement of the first secondary portion 25 of the arm about the hinge 13 and whereas the other end of the connecting rod 70 rotates about the hinge 71 which connects it to the first main portion 24 of the arm.
  • Figure 7 shows an intermediate step of the alignment of the first secondary portion 25 with the first main portion 24, of the alignment of the second main portion 27 with the second secondary portion 26 and of the alignment of the portions 26 and 27 with the portions 24 and 25, a step in which the third main portion 30 of the arm has been partially moved away from the second main portion 27 of the arm with means which shall be described later on and in order to allow the unfolding of the tie 36 without interference with the third portion 30 of the arm.
  • the flexible tie 36 consists of a first rigid portion 56 of a length about equal to the length of the screw-down jack 54, said portion 56 being hinged through a slot at 55 to the screw-down jack 54 and to the flexible tie 39.
  • the other end of the first portion 56 of the tie 36 is hinged at 91 to the end of a short tie 92; the other end of said short tie 92 is hinged at 93 to the end of a second short tie 94; the other end of said short tie 94 is hinged at 95 to the second portion 96 of the tie 36 of a relatively long length.
  • the sliding permitted by the slot made at 55 on the end of the first portion 56 of the tie 36 has the purpose of easing the unfolding or folding of the portions of the tie 33 during the unfolding or folding of the arm 50.
  • the other end of the second portion 96 is connected in a hinged manner at 97 to a third portion 98 of the tie 36; the opposite end of the third portion 98 is connected in a hinged manner at 99 to the fourth portion 100 of greater length, the other end of which is connected in a hinged manner at 101 to the end of the second main portion 27 at the height of the upper longeron.
  • Figure 8 illustrates the final position of alignment of the portions 24, 25, 26 and 27 of the arm 50 whereas figure 12 better illustrates the details of the portions 24, 25, 26 and 27 connected from the hinges 14, 15 and 16.
  • the actuator 60 When the actuator 60 is about to reach its end stop position and the first secondary portion 25 of arm is aligned with the first main portion 24, the connecting rod 70 connected in the hinge 71 to the first main portion 24 of arm and the connecting rod 68 connected in the hinge 67 to the first secondary portion 25, both of the connecting rods 70 and 68 being connected together by the hinge 69, go into traction preventing the further rotation of the first secondary portion 25 about the hinge 14 carrying out the function of supporting said first portion 25; the attachment hinges 61 and 59 of the actuator 60 have the holes slightly slotted or oversized, with this allowing the actuator 60 to reach the final position without any longer transmitting any force to the secondary portion 25 and without carrying out any structural supporting function of the portion 25.
  • the connecting rods 70 and 68 When the connecting rods 70 and 68 have gone into traction, the rotation downwards of the first secondary portion 25 with respect to the first main portion 24 about the hinge 14 is prevented by the traction of said connecting rods 70 and 68; with respect to the forces directed downwards, the group consisting of the first main portion 24 and the first secondary portion 25 is therefore a single isostatic reticular structure with hinges at the joints.
  • the actuator 62 When the actuator 62 reaches its end stop position, the second main portion 27 of the arm 50 has completed the rotation about the hinge 16 aligning itself with the second secondary portion 26 of the arm 50; the actuator 62, connected in a hinged manner at one end thereof to the second secondary portion 26 of the pin 90 inserted in the hole of the plate 58 and connected in a hinged manner at the other end thereof at 64 to the second main portion 27, carries out, in an end stop position, the function of a rigid shaft giving the group consisting of the second secondary portion 26 and the second main portion 27 the characteristics of a single isostatic reticular structure with hinges at the joints.
  • the isostatic group consisting of the portions 24 and 25 of the arm 50, connected at an end thereof in the hinge 13 to the top of the portion 23 of the tower, is supported in a suitable position by the traction of the ties 35 and 34 and by the tip 42 which prevent the rotation of the group consisting of the portions 24 and 25 about the hinge 13.
  • the isostatic group consisting of the portions 26 and 27, connected at its rear end in the hinge 15 to the front end of the group consisting of the portions 24 and 25, can rotate about the hinge 15 in the slack allowed by the sliding of the pin 90, integral with the group consisting of the portions 26 and 27, in the slot of the plate 57 integral with the group consisting of the portions 24 and 25; said isostatic group consisting of the portions 26 and 27 is supported in a suitable position by the traction of the ties 36 and 39 and by the tip 54 which prevent the rotation of the group consisting of the portions 26 and 27 about the hinge 15.
  • a plate 102 carrying a slot in a suitable position is integral with the third secondary portion 28 of the arm whereas a plate 103 carrying a hole in a suitable position is integral with the fourth secondary portion 29 of the arm.
  • a jack 104 inserted in the hole of the plate 103 and in the slot of the plate 102 allows the fourth secondary section 29 and the third secondary section 28 of the arm to rotate about the hinge 18 in the slack allowed by the jack 104 inserted in the slot of the plate 102 and in the hole of the plate 103.
  • a hydraulic actuator 110 is hinged at 105 to the upper structure of the second main portion 27 of the arm 50, the other end of the hydraulic actuator 110 being hinged at 106 to the plate 102 of the third secondary portion 28 of the arm.
  • a second hydraulic actuator 108 is hinged at 107 to the third main portion 30 of the arm, the other end of the hydraulic actuator 108 being hinged through the jack 104 to the plate 103 of the fourth secondary portion 29 of the arm.
  • a pair of connecting rods of different lengths 109 and 111 are hinged together at 112, the other end of the connecting rod 109 being hinged at 113 to the second main portion of the arm 27 and the other end of the connecting rod 111 being hinged at 114 to the plate 102 of the third secondary portion 28.
  • an end of a screw-down jack 116 is hinged at 115, the other end of the screw-down jack 116 being hinged at 117 to the ends of two flexible ties 118 and 119, preferably metal cables, the other end of said tie 118 being hinged at 120 to the second main portion 27 of the arm 50 near to the hinge 61 at the height of the upper longeron of the portion 27 and the other end of the tie 119 being hinged at 121 to the third main portion 30 of the arm 50 near to the hinge 20 at the height of the upper longeron of the portion 30.
  • Figure 9 shows an intermediate step of the alignment of the third secondary portion 28 of the arm 50 with the second main portion 27 of the arm 50, of the alignment of the third main portion 30 with the fourth secondary portion 29 of the arm 50 and of the alignment of the portions 29 and 30 with the portions 27 and 28.
  • the thrust exerted by the hydraulic actuator 110 makes the third secondary portion 28 of the arm rotate about the hinge 17 arranged at the end of the second main portion 27 of the arm; in the same way the thrust exerted by the actuator 108 makes the third main portion 30 of the arm rotate about the hinge 19 arranged at the end of the fourth secondary portion 29 of the arm.
  • Rotating the third secondary portion 28 of the arm about the hinge 17 determines the rotation of the fourth secondary portion 29, said fourth secondary portion 29 being connected, in a hinged manner at 18, to the third secondary portion 28 and with the possibility to rotate about said hinge 18 in the slack allowed by the jack 104 inserted in the slot of the plate 102 and in the hole of the plate 103.
  • the connecting rods 109 and 111 rotate about the hinge 112 which connects them at one end, whereas the other end of the connecting rod 111 connected at 114 to the upper part of the third secondary portion 28 of the arm displaces following the rotary movement of the third secondary portion 28 of the arm about the hinge 17 and whereas the other end of the connecting rod 109 rotates about the hinge 113 which connects it to the second main portion 27.
  • the tie 119 tends to go into traction and the tip 116, through the force exerted by said tip 119, tends to lift rotating about the hinge 115; by further continuing the rotation of the portion 28 about the hinge 17, of the portion 29 about the hinge 18, of the portion 30 about the hinge 19 and of the tip 116 about the hinge 115 the tie 118 also tends to go into traction.
  • Figure 10 illustrates the final position of alignment of the portions 27, 28, 29 and 30 of the arm 50 and the arrangement of the ties 118 and 119
  • figure 14 better illustrates the details of the portions 27, 28, 29 and 30 connected from the hinges 17, 18 and 19.
  • the actuator 110 is about to reach its end stop position and the third secondary portion 28 of the arm 50 is aligned with the second main portion 27, the connecting rod 109 connected in the hinge 113 to the second main portion 27 of the arm and the connecting rod 111 connected in the hinge 114 to the third secondary portion 28, both connecting rods 109 and 111 being connected together by the hinge 112, go into traction preventing the further rotation of the third secondary portion 28 about the hinge 17 and carrying out the function of supporting said first portion 28; the attachment hinges 105 and 106 of the actuator 110 have the holes slightly slotted or oversized, with this allowing the actuator 110 to reach the final position without transmitting any force any longer to the secondary portion 28 and without carrying out any longer the structural function of supporting the portion 28.
  • the actuator 108 When the actuator 108 reaches its end stop position, the third main portion 30 of the arm 50 has completed the rotation about the hinge 19 aligning itself with the fourth secondary portion 29 of the arm 50; the actuator 108, connected in a hinged manner at one end thereof to the fourth secondary portion 29 of the pin 104 inserted in the hole of the plate 103 and connected in a hinged manner at the other end thereof at 107 to the third main portion 30, carries out, in an end stop position, the function of a rigid shaft giving the group consisting of the fourth secondary portion 29 and the third main portion 30 the characteristics of a single isostatic reticular structure with hinges at the joints.
  • the isostatic group as defined above consisting of the portions 26, 27 and 28 of the arm 50, connected at one end thereof in the hinge 15 to the end of the first secondary portion 25, is supported in a suitable position by the traction of the tie 36 which prevents the rotation of said group 26, 27 and 28 about the hinge 15.
  • the isostatic group consisting of the portions 29 and 30 of the arm 50 connected at one end thereof in the hinge 18 to the front end of the group consisting of the portions 26, 27 and 28, can rotate about the hinge 18 in the slack allowed by the sliding of the pin 104, integral with the group consisting of the portions 29 and 30, in the slot of the plate 102 integral with the group consisting of the portions 22, 27 and 28; said isostatic group consisting of the portions 29 and 30 is supported in a suitable position by the traction from the tie 118, integral at one end with the hinge 120 and at the other end with the hinge 117, by the tie 119, integral at one end with the hinge 121 and at the other end with the hinge 117 and by the tip 116 which prevent the rotation of the group consisting of the portions 29 and 30 about the hinge 18.
  • the joint between the third portion 30 of the arm 50 and the terminal 31 has the function of allowing the complete folding of all of the elements of the arm without interference between the structural parts in the final step of said folding; in the top side view of the folded crane represented in figure 1, it should be noted how the terminal 31 must have the possibility of folding slightly upwards rotating about the hinge 20, whereas in the scaled down top side view of the completely mounted crane represented in figure 10, it should be noted how in the use step of the crane the terminal 31 must be aligned with the other portions of the arm 50.
  • Figure 15 represents one of the possible solutions to allow the terminal 31 to be arranged, respectively, in a position aligned with the other portions of the arm 50 when the crane is mounted and in use conditions; figure 16 represents how the same solution can allow the terminal 31 to fold upwards when the crane is dismounted and folded.
  • the terminal 31 is hinged at one end and at the height of the lower longerons at 20 to the third main portion 30 of the arm; a perforated plate 125 is integral with the same end of the terminal 31 at the height of the upper longeron whereas a short connecting rod 122 is hinged at 123 to the front end of the third main portion 30 of the arm at the height of the upper longeron.
  • a jack 124 inserted in the hole of the plate 125 and in the slot of the connecting rod 122 allows the terminal 31 to rotate with respect to the third main section 30 of the arm about the hinge 20 and in the slack allowed by the length of the slot, in such a way that the terminal 31 can fold for a short portion upwards when, with the crane folded, the terminal 31 rests upon other structural elements of the arm of the crane or can align itself with the other portions of the arm when, with the crane mounted, the terminal's own weight or the pull exerted by the conventional load-lifting cable fixed at the fixed end 126 to the end of the terminal 31, make the terminal rotate downwards.
  • the crane object of the present invention can be used, as well as with the arm 50 completely unfolded as illustrated above and for the purpose of increasing its versatility of use, also without the terminal 31 or with the third main portion 30 folded and resting upon the tie 36 or even with the second main portion of the arm 27 and the third main portion of the arm 30 folded upon themselves and resting upon the tie 35 in the configuration illustrated in figure 5.
  • the mounting procedure of the crane with the complete folding of the arm first of all and then of the tower implies the carrying out of the operations described for the mounting with the sequence order reversed.
  • a tower crane with a composite structure and automatic mounting has been realised in which the tower consists of at least three portions and the arm consists of many portions which can be folded and unfolded in the same direction of rotation.
  • the tower in at least three portions, of which two are hinged and a third is telescopic, allows the double result can be achieved of having a crane of substantial height when unfolded and of a small size when folded in transportation configuration.
  • the reduced height of the portions of the arm and their particular alternation of connection through hinges between the main portions, of a relatively long length, and the secondary portions, of a relatively short length allow an arm to be realised of a substantial length with the crane unfolded and of a height that is so low as to allow the bulk size for the transportation of the crane not to be exceeded.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
EP20030077915 2002-09-16 2003-09-15 Grue à montage automatique avec une tour repliable et télescopique et une flèche repliable Withdrawn EP1398291A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI20021957 ITMI20021957A1 (it) 2002-09-16 2002-09-16 Gru a torre automontante con torre ripiegabile e sfilabile e braccio a piu' porzioni ripiegabili
ITMI20021957 2002-09-16

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Publication Number Publication Date
EP1398291A1 true EP1398291A1 (fr) 2004-03-17

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007012094A1 (fr) * 2005-07-29 2007-02-01 Franz Ehrenleitner Fleche pliante
WO2009033198A1 (fr) * 2007-09-11 2009-03-19 Franz Ehrenleitner Flèche repliable
CN106219420A (zh) * 2016-07-06 2016-12-14 徐州市久发工程机械有限责任公司 一种快速架设移动式塔式起重机
US11040860B2 (en) * 2016-12-22 2021-06-22 Liebherr-Werk Biberach Gmbh Crane having a collapsible jib
CN113830687A (zh) * 2021-09-10 2021-12-24 浙江天弘机器人科技有限公司 一种组塔吊装设备及其操作方法
EP3995433A1 (fr) 2020-11-09 2022-05-11 Sáez Machinery, S.L. Grue à tour à dépliage et repliage automatiques

Citations (3)

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Publication number Priority date Publication date Assignee Title
EP0733584A1 (fr) * 1995-03-22 1996-09-25 Potain Grue à montage automatisé avec flèche repliable sur elle-même
US6276541B1 (en) * 1999-02-26 2001-08-21 Potain Device for simultaneously unfolding or folding crane jib tip elements
EP1225152A1 (fr) * 2001-01-23 2002-07-24 San Marco International S.r.l. Grue à montage automatique avec une tour repliable et télescopique et à flèche repliable

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0733584A1 (fr) * 1995-03-22 1996-09-25 Potain Grue à montage automatisé avec flèche repliable sur elle-même
US6276541B1 (en) * 1999-02-26 2001-08-21 Potain Device for simultaneously unfolding or folding crane jib tip elements
EP1225152A1 (fr) * 2001-01-23 2002-07-24 San Marco International S.r.l. Grue à montage automatique avec une tour repliable et télescopique et à flèche repliable

Cited By (7)

* Cited by examiner, † Cited by third party
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WO2007012094A1 (fr) * 2005-07-29 2007-02-01 Franz Ehrenleitner Fleche pliante
WO2009033198A1 (fr) * 2007-09-11 2009-03-19 Franz Ehrenleitner Flèche repliable
CN106219420A (zh) * 2016-07-06 2016-12-14 徐州市久发工程机械有限责任公司 一种快速架设移动式塔式起重机
US11040860B2 (en) * 2016-12-22 2021-06-22 Liebherr-Werk Biberach Gmbh Crane having a collapsible jib
EP3995433A1 (fr) 2020-11-09 2022-05-11 Sáez Machinery, S.L. Grue à tour à dépliage et repliage automatiques
CN113830687A (zh) * 2021-09-10 2021-12-24 浙江天弘机器人科技有限公司 一种组塔吊装设备及其操作方法
CN113830687B (zh) * 2021-09-10 2023-08-01 浙江天弘机器人科技有限公司 一种组塔吊装设备及其操作方法

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