EP2107033A1 - Ausleger eines Turmkrans mit Ausklapp- und Einklappmechanismus - Google Patents

Ausleger eines Turmkrans mit Ausklapp- und Einklappmechanismus Download PDF

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Publication number
EP2107033A1
EP2107033A1 EP09156408A EP09156408A EP2107033A1 EP 2107033 A1 EP2107033 A1 EP 2107033A1 EP 09156408 A EP09156408 A EP 09156408A EP 09156408 A EP09156408 A EP 09156408A EP 2107033 A1 EP2107033 A1 EP 2107033A1
Authority
EP
European Patent Office
Prior art keywords
boom
lever
arrow
folding
jack
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
EP09156408A
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English (en)
French (fr)
Other versions
EP2107033B1 (de
Inventor
Paul Laroche
Ivan Massacrier
Gérard PALLOT
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.)
Manitowoc Crane Group France SAS
Original Assignee
Manitowoc Crane Group France SAS
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Publication date
Application filed by Manitowoc Crane Group France SAS filed Critical Manitowoc Crane Group France SAS
Publication of EP2107033A1 publication Critical patent/EP2107033A1/de
Application granted granted Critical
Publication of EP2107033B1 publication Critical patent/EP2107033B1/de
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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
    • B66C23/348—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes the erection being operated by jacks

Definitions

  • the present invention relates to the technical field of tower cranes, usable in particular on construction sites. More particularly, it relates to a tower crane boom which is made of two or more articulated linkage elements, and which comprises a folding-unfolding mechanism, by means of which the boom is made collapsible for transport, and deployable for its use.
  • the second element in the retracted position of the jack, the second element is folded over the first element, considered as a fixed element, which corresponds to a folded transport position.
  • the second element By actuating the cylinder in the direction of the output of its rod, the second element pivots to be brought into the extension of the first element, which corresponds to an extended working position.
  • arrows composed of at least two elements respectively designated as "foot of arrow” and “arrowhead", these cranes being equipped with two tie rods which are respectively a short tie intended to support the foot of arrow, and a tie of greater length intended to support the point of arrow.
  • tie rods which are respectively a short tie intended to support the foot of arrow, and a tie of greater length intended to support the point of arrow.
  • More recent folding boom crane designs include the use of hydraulic cylinders to control the folding and unfolding of the boom.
  • a particular solution consists in interposing a triangular intermediate short arrow element between the jib foot and the jib, the jack controlling the pivoting of the intermediate jib element relative to the jib foot, and a mechanism articulated then simultaneously imposing the pivoting of the arrowhead relative to the intermediate boom element.
  • this solution remains heavy and it has a large number of mechanical parts; in particular, it requires splints on the lower chords of the different boom elements, chords which usually constitute the runway of the boom carriage.
  • the present invention provides solutions to these problems, and its purpose is therefore to provide a folding and unfolding device specially adapted to a collapsible tower crane boom, this device being designed not to be stressed when the boom is deployed to horizontally, and also to ensure the continuity of the tread of the carriage in the aligned working position of the arrow.
  • the object of the invention is a collapsible boom of a tower crane, with folding-unfolding mechanism, the boom being equipped with two tie-rods and consisting of at least two boom members with respective upper and lower chords, the boom elements being hinged together at their upper chords, while the lower chords constitute the rolling path of a carriage movable along the boom in the aligned working position, the folding-unfolding mechanism being composed thereof -Even a cylinder, a lever with three points of articulation and a connecting rod, the lever having a first point of articulation located on a first element of arrow, the cylinder connecting this first element of arrow to a second pivot point of the lever, and the connecting rod connecting the third point of articulation of the lever to the other arrow element, so that this other arrow element is p ivotable between a working position aligned with the first boom member and a transport position folded over the first boom member, the foldable tower crane boom being essentially characterized by the fact that in the folding mechanism
  • the axis carried by the end of the cylinder is first supported at the highest point of the lever light, then, as the arrow tip pivots and rises, the thrust is exerted on a longitudinal side of the light, to a "vertical" position of the arrowhead, that is to say a position in which the center of gravity of the arrowhead is aligned vertically with the aforementioned axis.
  • the force in the cylinder is zero and said axis tends to descend into the light, under the effect of gravity.
  • this downward movement is prevented by the presence of a mechanical stop provided on the first boom member, at the lower ribs substantially below the second pivot point of the lever, the abutment cooperating with the end considered cylinder.
  • the traction phase during which the weight of the arrowhead becomes the driving element, the axis located at the end of the cylinder then bearing on the other longitudinal side of the light.
  • the respective ends of the lower chords of the first boom element and the other boom element, located in the hinge zone of these two elements comprise respective end pieces of complementary shapes, one of the end pieces, integral with an arrow element, having a square or rectangular base section and having in its front part a notch oriented along a diagonal of its square or rectangular section, while the complementary end piece , secured to the other boom element, also has a square or rectangular base section and comprises a pin oriented along a diagonal of its square or rectangular section, the pin being adapted to engage with a game, in aligned position working of the arrow, in the notch of the first mouthpiece.
  • the two complementary ends of the lower chords which can also be designated respectively as a female end and a male end, fit one into the other. in the other without coming directly into contact with each other, but so as to form on their upper face and on their side face a raceway which, although interrupted, has vis-à-vis pebbles of the boom carriage a longitudinal continuity, to ensure the smooth running of the rollers of the boom carriage.
  • a carriage usually comprises four support rollers, of horizontal axis, and four lateral guide rollers, of vertical axis.
  • the configuration of the end pieces and their interlocking ensure the continuity of the lower chords of the jib foot and the jib tip, in a horizontal plane to guide the carrier rollers of the trolley, but also in a vertical plane for guiding the lateral rollers of the same carriage.
  • a crane folding tower comprises a fixed base frame 2, on which is rotatably mounted a rotating frame 3, orientable about a vertical axis A.
  • the crane comprises a mast 4, here realized in two mast elements 5 and 6 hinged together about a horizontal axis 7, which are a lower mast element 5 and an upper mast element 6.
  • the lower mast element 5 is articulated by its base, around a horizontal axis 8, at the front of the rotating frame 3.
  • the upper mast element 6 is articulated, around a horizontal axis 9, an arrow 10 along which is movable a carriage 11, the arrow 10 here being composed of two main elements, respectively an arrow foot 12 and a second boom member 13, which is extended by a third shorter element 14 said dart.
  • the crane further comprises mast struts 4, a retainer 16 of the boom 10, and a ballast (not shown) carried by the rear portion of the rotating frame 3.
  • this is a crane whose second boom member 13 is foldable above the boom foot 12.
  • the second boom member 13 is hinged to the boom foot 12 about an axis. horizontal 17 located at the respective upper chords 18 and 19 of these two boom members 12 and 13.
  • the dart 14 is itself foldable against the second boom member 13, the boom 10 thus folding "snail”.
  • the three elements 12, 13 and 14 of the arrow 10 are aligned substantially horizontally.
  • the arrow 10 is supported by means of two tie rods 20 and 21 which belong to the retaining device 16, the first tie 20 supporting the jib foot 12 while the second tie rod 21 supports the second jib element 13 extended by the jib 14.
  • the respective lower chords 22 and 23 of the jib foot 12 and the jib member 13 (as well as the lower chords of the jib 14) form a raceway for the carriage 11.
  • the folding-unfolding mechanism 24 consists of a hydraulic cylinder 25, a lever 26 with three pivot points and a connecting rod 27, which take place in the space requirement of the boom. 10.
  • the jack 25 has a jack body 28, one end of which is hinged about a horizontal axis 29, on the jib foot 12.
  • the central axis of the jack 25 extends substantially in the longitudinal direction of the jib 12
  • the rod 30 of the ram 25 is directed forwards, the anterior end of the rod 30 carrying a cylinder head 31 which is articulated (in a manner specified below) to the lever 26.
  • the lever 26, located in a vertical plane, has three hinge points 32, 33 and 34, arranged in a triangle. By its first point of articulation 32, the lever 26 is pivotally mounted about a horizontal axis on the front end of the jib 12, substantially at the upper chord 18 of the jib 12.
  • the cylinder head 31 is articulated about a horizontal axis at the second pivot point 33 of the lever 26, this second pivot point 33 being located in the rear part of the lever 26.
  • the rod 27 connects the third hinge point 34 of the lever 26, located in the front portion of this lever 26, to a last hinge point 35 located at the rear end of the boom member 13.
  • the cylinder head 31 supports a transverse axis 36, while on the lever 26 is formed an oblong slot 37, through which the axis 36 passes, the width of the light 37 corresponding to the diameter of this axis 36.
  • the light 37 is inclined relative to a horizontal plane, if one refers to the position occupied by the lever 26 when the arrow 10 is aligned and horizontal ( Figures 3 and 4 ).
  • the jack 25 is actuated in the direction of the output of its rod 30, the pin 36 connected to the cylinder head 31 then exerting a thrust on the lever 26.
  • the axis 36 bears at the highest point of the light 37, then the thrust of the axis 36 is exerted on the right side (with reference to the drawing) of the light 37.
  • the lever 26 then pivots around its first point of articulation 32, in the opposite direction of clockwise (with reference to the drawing).
  • the corresponding displacement of the third hinge point 34 of the lever 26 pushes the rod 27, which itself moves the boom member 13 by pivoting it upwards about the axis 17.
  • the boom element 13 is thus raised up to a vertical position ( figure 5 ), and more precisely a position in which the center of gravity of the boom member 13 (here supplemented by the dart 14) is in a vertical plane containing the axis 36 of the cylinder head 31. At this time, the force in the cylinder 25 is zero.
  • the abutment 38 may consist of a bar added to the jib element 12 at the lower chords 22 of this element, and located in the median vertical plane of the jib 10, this plane containing the jack 25.
  • figure 1 shows the crane in a position where the boom 10 is almost fully folded, and the figure 7 illustrates the fully folded position of the boom 10, the boom member 13 being folded horizontally above the boom foot 12.
  • the inclination of the light 37 of the lever 26 depends on the dimensions of the various parts constituting the folding-unfolding mechanism 24.
  • the light 37 must be perpendicular to the axis of the jack 25 when the force in this jack 25 is zero, that is to say with the vertical boom element 13, more precisely in the intermediate position for which the center of gravity of the boom element 13 is in the vertical plane containing the axis 36 of the cylinder head 31.
  • the female end piece 39 has a short portion 41 of square section, intended to be introduced and welded to the end of the square section tube forming the lower chord 22 of the jib foot 12, and a part 42 of square base section, but wider and longer, having in its front region a cut 43 inclined at 45 °, in other words oriented along a diagonal of the square section of the tip considered.
  • the spigot 40 has a short portion 44 of square section, to be inserted and welded to the end of the square section tube forming the lower chord 23 of the boom member 13, and a portion 45 to base section square, but wider and longer, which forms a pin 46 also oriented along a diagonal of the square section of the tip considered.
  • the pin 46 of the spigot 40 has a complementary configuration of the notch 43 of the socket 39, however with slightly smaller dimensions that provide a longitudinal and transverse play during the nesting (see below).
  • Chamfers 47 and 48 are provided respectively at the free ends of the female end 39 at the inlet of the notch 43, and the male end 40 towards the end face of the post 46, to facilitate the reciprocal centering and guidance.
  • two end pieces 39 and 40 are provided respectively at the free ends of the female end 39 at the inlet of the notch 43, and the male end 40 towards the end face of the post 46, to facilitate the reciprocal centering and guidance.
  • the square base section of the wide portion 42 of the female end piece 39 is equal to the outer section of the tube forming the corresponding lower chord 22, so that the female end piece 39 exactly extends the tread of the trolley 11 on the Similarly, the square base section of the wide portion 45 of the spigot 40 is equal to the outer section of the tube forming the corresponding lower chord 23 so that the spigot 40 extends exactly the way. rolling of the carriage 11 on the boom member 13.
  • the two end pieces 39 and 40 nested one inside the other constitute, on the upper face and on one of the lateral faces a longitudinally continuous rolling surface for the rollers of the carriage 11, which surface ensures the smooth running of these rollers. More particularly, there is formed here a horizontal continuous rolling surface 49, indicated by hatching, for the horizontal axis bearing rollers of the carriage, and a vertical continuous rolling surface 50, indicated by other hatching, for the lateral rollers. guiding the carriage, these other rollers being of vertical axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
EP20090156408 2008-04-02 2009-03-27 Ausleger eines Turmkrans mit Ausklapp- und Einklappmechanismus Active EP2107033B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0801825A FR2929606B1 (fr) 2008-04-02 2008-04-02 Fleche de grue a tour avec mecanisme de pliage-depliage

Publications (2)

Publication Number Publication Date
EP2107033A1 true EP2107033A1 (de) 2009-10-07
EP2107033B1 EP2107033B1 (de) 2011-01-12

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ID=39897893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20090156408 Active EP2107033B1 (de) 2008-04-02 2009-03-27 Ausleger eines Turmkrans mit Ausklapp- und Einklappmechanismus

Country Status (3)

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EP (1) EP2107033B1 (de)
DE (1) DE602009000551D1 (de)
FR (1) FR2929606B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103552940A (zh) * 2013-11-13 2014-02-05 徐工集团工程机械股份有限公司 一种人字架及具有该人字架的强夯机
CN104210969A (zh) * 2013-06-03 2014-12-17 徐工集团工程机械股份有限公司 人字架以及强夯机
CN104512821A (zh) * 2014-12-23 2015-04-15 中联重科股份有限公司 工程机械的起重臂和工程机械
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499354A1 (fr) 1981-02-11 1982-08-13 Kverneland As Charniere a autoverrouillage en position de travail, notamment pour instruments aratoires
US4446975A (en) * 1982-03-02 1984-05-08 Koenig Wilhelm Rotary crane
FR2636616A1 (fr) 1988-09-20 1990-03-23 Potain Sa Grue repliable a fleche en deux ou trois elements articules les uns aux autres
EP0360702A1 (de) 1988-09-20 1990-03-28 Potain Zusammenlegbarer Kran mit einem Ausleger, bestehend aus zwei oder drei gelenkig miteinander verbundenen Elementen
DE9316113U1 (de) 1993-10-21 1995-02-16 Liebherr-Werk Biberach GmbH, 88400 Biberach Turmdrehkran

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2499354A1 (fr) 1981-02-11 1982-08-13 Kverneland As Charniere a autoverrouillage en position de travail, notamment pour instruments aratoires
US4446975A (en) * 1982-03-02 1984-05-08 Koenig Wilhelm Rotary crane
FR2636616A1 (fr) 1988-09-20 1990-03-23 Potain Sa Grue repliable a fleche en deux ou trois elements articules les uns aux autres
EP0360702A1 (de) 1988-09-20 1990-03-28 Potain Zusammenlegbarer Kran mit einem Ausleger, bestehend aus zwei oder drei gelenkig miteinander verbundenen Elementen
DE9316113U1 (de) 1993-10-21 1995-02-16 Liebherr-Werk Biberach GmbH, 88400 Biberach Turmdrehkran

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104210969A (zh) * 2013-06-03 2014-12-17 徐工集团工程机械股份有限公司 人字架以及强夯机
CN104210969B (zh) * 2013-06-03 2016-01-13 徐工集团工程机械股份有限公司 人字架以及强夯机
CN103552940A (zh) * 2013-11-13 2014-02-05 徐工集团工程机械股份有限公司 一种人字架及具有该人字架的强夯机
CN103552940B (zh) * 2013-11-13 2015-12-16 徐工集团工程机械股份有限公司 一种人字架及具有该人字架的强夯机
CN104512821A (zh) * 2014-12-23 2015-04-15 中联重科股份有限公司 工程机械的起重臂和工程机械
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

Also Published As

Publication number Publication date
EP2107033B1 (de) 2011-01-12
FR2929606A1 (fr) 2009-10-09
DE602009000551D1 (de) 2011-02-24
FR2929606B1 (fr) 2010-09-10

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