EP2708488A1 - Zusammenklappbarer Ausleger für einen Kran und Kran - Google Patents

Zusammenklappbarer Ausleger für einen Kran und Kran Download PDF

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Publication number
EP2708488A1
EP2708488A1 EP12184577.0A EP12184577A EP2708488A1 EP 2708488 A1 EP2708488 A1 EP 2708488A1 EP 12184577 A EP12184577 A EP 12184577A EP 2708488 A1 EP2708488 A1 EP 2708488A1
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EP
European Patent Office
Prior art keywords
jib
axis
hinge
connecting element
arrangement
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
EP12184577.0A
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English (en)
French (fr)
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EP2708488B1 (de
Inventor
Corrado Scampini
Denis Tedesco
Klaus Meissner
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Gru Comedil SRL
Original Assignee
Gru Comedil SRL
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 Gru Comedil SRL filed Critical Gru Comedil SRL
Priority to EP20120184577 priority Critical patent/EP2708488B1/de
Priority to EP20130165293 priority patent/EP2711328B1/de
Publication of EP2708488A1 publication Critical patent/EP2708488A1/de
Application granted granted Critical
Publication of EP2708488B1 publication Critical patent/EP2708488B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/68—Jibs foldable or otherwise adjustable in configuration

Definitions

  • the invention is directed on a jib for a crane, in particular for a self-erecting crane, and such a crane, in particular such a self-erecting crane, comprising said jib.
  • EP 0 870 726 B 1 discloses a self-erecting crane with a sideways foldable jib in a transport position of the crane.
  • a jib is foldable and comprises an intermediate folding jib element.
  • the folding of the jib is limited due to the kinematics of the intermediate folding jib element.
  • a jib connecting unit enables enhanced connection of a first jib element and a second jib element of a jib for a crane.
  • the jib connecting unit enables a transition of the jib between an operation arrangement and transportation arrangement.
  • the first jib element and the second jib element are oriented coaxially to a longitudinal axis of the jib.
  • the transportation arrangement the jib is folded such that the first jib element and the second jib element are arranged next to each other and in particular are arranged parallel besides each other.
  • the arrangement of the first jib element and the second jib element besides each other in the transportation arrangement is enhanced by the jib connecting unit which comprises a first jib connecting element, a second jib connecting element and at least one jib hinge element being articulated at a first hinge axis with the first jib connecting element and said at least one hinge element being articulated at a second hinge axis with the second jib connecting element.
  • a lateral arrangement of the first and the second jib element is adjustable.
  • the configuration of the folded jib in the transport arrangement comprises an additional degree of freedom.
  • the first hinge axis and the second hinge axis are arranged to each other at a perpendicular offset.
  • the first hinge axis is transversally oriented to a first jib connecting axis at which the first jib connecting element is articulated with the first jib element.
  • the first hinge axis is perpendicular to the first jib connecting axis.
  • the second jib connecting element is articulated at a second jib connecting axis with the second jib element.
  • the second hinge axis is transversally, in particular perpendicular, oriented to the second jib connecting axis.
  • the first jib element comprises a first jib element axis.
  • the second jib element comprises a second jib element axis. In the transportation arrangement of the jib the first jib element axis and the second jib element axis are arranged parallel to each other and spaced apart to each other.
  • a jib with a jib connecting unit according to claim 2 comprises enhanced stiffness and structural stability of the first jib connecting element and/or of the second jib connecting element.
  • At least one of the groups of the first jib connecting element and the second jib connecting element is of trapezoid shape. That means that at least one of said elements comprises a cross section in a plane perpendicular to the longitudinal axis having a trapezoid contour.
  • a transfer of forces from the second jib element through the jib connecting unit to the first jib element is enhanced.
  • pressure forces are directly led through lower booms of the second jib element, the jib connecting unit and the first jib element.
  • tension forces are led through upper booms of the second jib element, the jib connecting unit and the first jib element.
  • the jib connecting unit comprises lower booms building a lower boom plane section and upper booms building an upper boom plane section as base and roof of the trapezoid.
  • the transmission of forces between the first jib element and the second jib element provided by the jib connecting unit is enhanced.
  • the jib connecting element is not of triangular or pyramidal shape with a vertex at the top of the elements as disclosed in EP 0 870 726 B 1 .
  • a jib according to claim 3 has a jib connecting unit with a first jib connecting element of enhanced stiffness. Since the first hinge axis which provides articulation of the at least one hinge element is provided inside the first jib connecting element, the stability of the first jib connecting element is enhanced.
  • the first hinge axis intersects a lower first boom plane section which is built by two lower first booms of the first jib connecting element. In particular, the two lower first booms extend along the longitudinal axis.
  • the first hinge axis is provided at least partially inside the cross sectional area of the first jib connecting element.
  • a jib according to claim 4 comprises an upper first boom plane section for enhancing the stiffness of the first jib connecting element.
  • the upper first boom plane section has at least partially an inclination concerning a horizontal plane.
  • a jib according to claim 5 provides enhanced folding.
  • a telescopic cylinder is provided for connecting the first jib connecting element to the first jib element.
  • Said first telescopic cylinder is articulated at the first jib connecting element around a first cylinder hinge axis.
  • Said first cylinder hinge axis is arranged between the lower first boom plane section and the upper first boom plane section.
  • a jib according to one of the claims 6 to 8 comprises a second jib connecting element according to a first jib connecting element of claims 3 to 5.
  • a jib according to claim 9 comprises a jib connecting unit with two hinge elements.
  • the two hinge elements are concentrically arranged concerning the first hinge axis and the second hinge axis.
  • a jib according to claim 10 comprises enhanced accessibility to the jib connecting unit, in particular to the first and to the second jib connecting elements also in the operation arrangement.
  • a jib according to claim 11 provides further flexibility for the handling of the jib connecting elements of the jib connecting unit. Since an additional, intermediate hinge axis is provided, the two hinge elements can be articulated at said intermediate hinge axis. An additional degree of freedom for kinematics of the hinge elements is provided.
  • a jib according to claim 12 enables an offset of the first jib element and the second jib element along the longitudinal axis such that the first jib element and the second jib element are spaced apart from each other along the longitudinal axis.
  • a jib according to claim 13 enables enhanced stiffness of the hinge elements since the intermediate hinge axis is coaxially arranged to a fixing axis of the hinge elements.
  • the fixing axis enables fixing of the first jib connecting element with the second jib connecting element, in particular in the operation arrangement.
  • the intermediate hinge axis provides multiple functionality.
  • a jib according to claim 14 enables blocking of the articulation of the two hinge elements to each other around the intermediate hinge axis.
  • each of the two hinge elements comprises a blocking bore, wherein in the offset arrangement of the two hinge elements said blocking bores are aligned concentrically.
  • a jib according to claim 15 enhances the handling of the jib, in particular during an operation, i. e. in operation arrangement of the jib.
  • At least one fixing means is provided at the jib elements of the jib.
  • Said fixing means can be realized by bores to be aligned concentrically in the operation arrangement of the jib such that the aligned bores are to be fixed with a bolt.
  • other fixing means can be provided as well.
  • said fixing means, in particular the bores to be aligned are arranged spaced apart from the first hinge axis and the second hinge axis.
  • the bores are aligned concentrically to a fixing axis, wherein said fixing axis oriented parallel to the first hinge axis and the second hinge axis.
  • a crane having a jib enables folding the jib between the operational arrangement and the transportation arrangement.
  • the transportation arrangement at least one of the jib elements is arranged such that a mast axis, the first jib element axis and the second jib element axis are arranged at corners of a triangle.
  • the mast, the first jib element and the second jib element each comprise a rectangular cross section concerning their longitudinal axis, wherein in the transportation arrangement the mast is arranged neighboring to a horizontal edge of the rectangular cross section of the first jib element and the second jib element is arranged neighboring to a vertical edge of the rectangular cross section of the first jib element.
  • the mast and the second jib element are arranged at neighboring edges of the rectangular cross section of the first jib element.
  • the mast, the first jib element and the second jib element are not arranged in a stack formation stacked on each other in one direction.
  • the crane according to claim 16 comprises an enhanced transportation arrangement. In particular it possible to transport the crane on regular streets, since the crane in the transportation arrangement does not exceed height limitations. Also transport by train or ship is possible.
  • a jib of a self-erecting crane having a jib connecting unit comprising a first and a second jib connecting element which are articulated to each other at at least one vertical hinge axis.
  • the at least one hinge axis is situated at least partially inside of the jib connecting unit.
  • the hinge axis intersects a lower boom plane section of the first jib connecting element or of the second jib connecting element.
  • the lower boom plane sections of the corresponding jib connecting elements in particular build a rectangular base having lower booms.
  • the hinge axis intersects at least one of the lower booms.
  • the hinge axis is not situated on one of the sides of the jib connecting unit. It is possible that the at least one hinge axis is situated completely inside the jib connecting unit. In particular, the hinge axis intersects the rectangular base and a rectangular roof built by an upper boom plane section. Since the hinge axis is integrated in the jib connecting unit, the stiffness of the jib connecting unit is enhanced. Further, flexibility concerning the articulation of the jib connecting elements to each other is not affected. The jib connecting unit enables stable, secure and flexible folding of the jib.
  • the current invention comprises the self-erecting crane of claim 17 also in combination with at least one of the further features described in this application.
  • Fig. 1 shows a side view of a self-erected crane 1.
  • the crane 1 comprises a basic structure 2 with an undercarriage 3 which is supported on a ground 4 via struts 5.
  • the basic structure 2 further comprises an upper carriage 6 to which a counter weight arrangement 7 comprising several stackable counter weights 8 is attached.
  • a mast 9 is connected to the upper carriage 6 of the basic structure 2.
  • the mast 9 is oriented vertically concerning the ground 4.
  • the mast 9 comprises a mast longitudinal axis 24.
  • the mast longitudinal axis 24 is vertically oriented.
  • the mast 9 comprises several lattice sections arranged along the mast longitudinal axis 24.
  • a lower section of the mast comprises a larger cross sectional area than an upper section of the mast such that the upper section can be stacked into the lower section for space-saving arrangement of the mast 9 in a transportation arrangement.
  • a jib 10 is articulated around a horizontal axis 11.
  • the jib 10 is luffable around the horizontal axis 11.
  • the horizontal axis 11 is also called luffing axis.
  • a corresponding luffing plane is vertically oriented.
  • the luffing plane is the drawing plane of fig. 1 .
  • the jib 10 is slacked via slacking means 12 at the counter weight arrangement 7.
  • the jib 10 comprises a first jib element 13, a second jib element 14, a third jib element 15 and a fourth jib element 16.
  • the first jib element 13 comprises a first jib element axis 73.
  • the second jib element 14 comprises a second jib element axis 74.
  • the first jib element 13 is articulated at the horizontal axis 11 with the mast.
  • the first jib element is also called jib foot element.
  • the first jib element 13 and the second jib element 14 are connected via a connecting unit 17 with a first jib connecting element 18 and a second jib connecting element 19.
  • the jib connecting unit 17 is explained in detail later.
  • the first jib element 13 is directly articulated at a first jib connecting axis 20 with the first jib connecting element 18.
  • the first jib connecting axis 20 is arranged in the region of lower booms of the first jib element 13. In the region of upper booms of the first jib element 13 it is connected to the first connecting element 18 via a first telescopic cylinder 21.
  • the second jib element 14 is directly articulated at a second jib connecting axis 22 with the second jib connecting element 19.
  • the second jib connecting axis 22 is horizontally oriented.
  • the second jib connecting axis 22 is arranged in an area next to the lower booms of the second jib element 14. In an area of upper booms of the second jib element 14, the second jib element 14 is connected to the second jib connecting element 19 via a second telescopic cylinder 23.
  • the jib 10 comprises a longitudinal axis 25.
  • the arrangement in fig. 1 is the so-called operation arrangement of the crane 1.
  • the jib 10 is unfolded, i. e. the first jib element 13, the second jib element 14, the third jib element 15 and the fourth jib element 16 are disposed along the longitudinal axis 25.
  • the first jib element 13 and the second jib element 14 are coaxially arranged concerning the longitudinal axis 25.
  • the first jib element axis 73 is coincident with the longitudinal axis 25.
  • the second jib element axis 74 is coincident with the longitudinal axis 25.
  • the longitudinal axis 25 provides an inclination concerning the horizontal plane of about 5°. It is also possible to arrange the jib 10 in another luffing position, in particular with a luffing angle in a range between 0° to 25°, concerning the horizontal plane.
  • a travelling trolley 29 For lifting and lowering a load with the crane 1 a travelling trolley 29 is provided.
  • the travelling trolley 29 is provided at lower booms of the jib 10.
  • the travelling trolley 29 is guided at the lower booms of the jib 10.
  • the travelling trolley 29 is driven by trolley motor 30 via cables.
  • the second jib element 14 is connected to the third jib element 15 via a first connecting element 26.
  • the third jib element 15 and the fourth jib element 16 are connected with each other via a second connecting element 27.
  • the fourth jib element 16 comprises a cross sectional area such that it can be nested onto the third jib element 15.
  • the fourth jib element 16 has an essentially U-shaped cross section with an opening of the U at an upper end.
  • the fourth jib element 16 can be set on top of the third jib element 15, wherein the lattice elements of the third jib element 15 are disposed inside the open cross section of the fourth jib element 16.
  • folding of the fourth jib element 16 onto the third jib element 15 does not lead an enlargement of the height of the jib 10.
  • a folded arrangement of the crane 1 and in particular of the jib 10 is illustrated.
  • the fourth jib element 16 is nested on the third jib element 15 as described above.
  • the third jib element 15 and the fourth jib element 16 are connected via the second connecting element 27.
  • the second jib element 14 is connected via the vertically arranged first connecting element 26 with the third jib element 15.
  • the third jib element 15 together with the fourth jib element 16 are arranged on the second jib element 14.
  • the fourth jib element 16 is arranged between the second jib element 14 and the third jib element 15. That means that the third jib element 15 is in the transportation arrangement according to fig. 2 articulated with 180° around a horizontal axis of the first connecting element 26 and is therefore in a reversed arrangement.
  • the second jib element 14 is connected via the jib connecting unit 17 to the first jib element 13.
  • the first jib element 13 is arranged behind the second jib element 14, third jib element 15 and fourth jib element 16 as illustrated in fig. 2 . That means that the first jib element 13 and the second jib element 14 are not arranged on top of each other but besides each other.
  • the first jib connecting element 18 and the second jib connecting element 19 are articulated with respect to each other.
  • the first jib element 13 is arranged on top of the mast 9.
  • the mast longitudinal axis 24, the first jib element axis 73 and the second jib element axis 74 are arranged at corners of a triangle 28 which is schematically illustrated in fig. 3 .
  • the mast 9, first jib element 13 and the second jib element 14 are not stacked on each other such that their corresponding axes 24, 73, 74 are arranged along one direction.
  • the height of the crane 1 in the transportation arrangement as illustrated in fig. 2 and 3 is reduced.
  • a first embodiment of the jib connecting unit 17 is illustrated in fig. 4 to fig. 9 .
  • the jib connecting unit 17 comprises the first jib connecting element 18 and the second jib connecting element 19.
  • the first jib connecting element 18 provides openings arranged concentrically to the first jib connecting axis 20. Additional openings are provided concentrically to a first cylinder hinge axis 31.
  • the second jib connecting element 19 provides openings concentrically arranged concerning the second jib connecting axis 22. Further openings are provided concentrically around a second cylinder hinge axis 32.
  • the jib connecting axes 20, 22 and the cylinder hinge axes 31, 32 are oriented parallel to each other. In particular, said axes 20, 22, 31 and 32 are horizontally oriented. Said axes 20, 22, 31 and 32 are oriented perpendicular to the longitudinal axis 25 of the jib 10.
  • the first jib connecting element 18 is connected with the second jib connecting element 19 via two hinge elements 33.
  • Each hinge element 33 is provided as a connecting rod articulated at a first hinge axis 34 with the first jib connecting element 18 and articulated at a second hinge axis 35 with the second jib connecting element 19.
  • the first hinge axis 34 and the second hinge axis 35 are arranged to each other with a lateral offset D to each other, wherein said offset D is oriented perpendicular to said first hinge axis 34 and to said second hinge axis 35.
  • the lateral offset D is oriented parallel to the longitudinal axis 25 of the jib 10.
  • Both, the first jib connecting element 18 and the second jib connecting element 19 each comprises a cross section oriented perpendicular to the longitudinal axis 25, wherein said cross section is of trapezoid shape.
  • the trapezoid comprises a bottom in form of a lower first boom plane section defined by two lower first booms 36 extending along the longitudinal axis 25.
  • a roof of the trapezoid is provided in form of an upper first boom plane section.
  • the upper first boom plane section is provided by an upper first plate element 37.
  • the first cylinder hinge axis 31 intersects the upper first plate element 37.
  • the first jib connecting axis 20 intersects each of the lower first booms 36 at free ends facing the first jib element 13.
  • the upper first plate element 37 comprises an inclination concerning an horizontal plane.
  • receiving means 39 are provided for receiving rope guiding means, e. g. rope discs, or for receiving structural parts of the jib, e.g. struts.
  • the second jib connecting element 19 comprises lower second booms 40 defining a lower second boom plane section. Further, an upper second plate element 41 defines an upper second boom plane section. The upper second boom plane section may comprise at least partially an inclination.
  • the trapezoid of the second jib connecting element 19 has a bottom in form of the lower second boom plane section and a roof in form of an upper second boom plane section.
  • the upper first boom plane section has a width W U1 .
  • the lower first boom plane section has a width W L1 .
  • the lower second boom plane section comprises a width W L2 .
  • the upper second boom plane section comprises a width W U2 .
  • width W U1 of the upper boom plane section of the first jib connecting element 18 is nearly identical to the width W U2 of the upper boom plane section of the second jib connecting element 19.
  • the width W L1 of the lower boom plane section of the first jib connecting element 18 is nearly identical to the width W L2 of the lower boom plane section of the second jib connecting element 19.
  • the widths W U1 , W U2 of the upper boom plane sections of the jib connecting elements 18, 19 each are more narrow than the widths W L1 , W L2 of each corresponding lower boom plane section.
  • Each of the lower boom plane sections comprises several stiffening struts 42.
  • the lower first boom plane sections are each connected with the corresponding upper first plate elements 37, 41 with stiffening plates 43.
  • the stiffening plates 43 each comprise a window for reduction of the material amount and therefore for reduction of the weight.
  • first hinge axis 34 and the second hinge axis 35 intersect the corresponding lower boom plane section.
  • first hinge axis 34 and the second hinge axis 35 intersect at least the lower booms 36, 40.
  • Each of the hinge elements 33 comprises a stopping pin 44 in order to provide a defined positioning of the first jib connecting element 18 relative to the second jib connecting element 19.
  • the hinge elements 33 are concentrically arranged concerning the first hinge axis 34 and the second hinge axis 35.
  • the two hinge elements 33 are spaced apart from each other along the first hinge axis 34 and along the second hinge axis 35.
  • the first jib connecting element 18 provides a first fixing means 45 and the second jib connecting element 19 comprises a second fixing means 46.
  • Both fixing means 45, 46 comprise an opening, wherein said openings 45, 46 are aligned with each other in the operation arrangement of the jib connecting unit 17 as illustrated in fig. 4 to 6 .
  • the first jib connecting element 18 and the second jib connecting element 19 can be fixed to each other e. g. by using a bolt in the aligned bores of the fixing means 45, 46 such that an articulation of the first jib connecting element 18 relative to the second jib connecting element 19 along at least one of the hinge axis 34, 35 is prevented.
  • the jib elements 13 to 17 are disposed coaxially to the longitudinal axis 25.
  • Starting the folding means folding the fourth jib element 16 with the second connecting element 27 onto the third jib element 15.
  • the third jib element 15 together with the folded fourth jib element 16 are folded via the first connecting element 26 onto the second jib element 14.
  • a labyrinth-like arrangement of the second jib element 14, the third jib element 15 and the fourth jib element 16 results as shown in fig. 2 .
  • the second jib element 14 together with the third jib element 15 and the fourth jib element 16 are articulated around the second connecting axis 22 from a nearly horizontal arrangement in fig. 1 counterclockwise for approximately 90°.
  • This articulation is provided by the second telescopic cylinder 23.
  • the first telescopic cylinder 21 is used to articulate the first jib element 13 at the first jib connecting axis 20 towards the jib connecting unit 17 clockwise for approximately 90° such that in the folded arrangement of the jib 20 the first jib element 13 and the second jib element 14 are arranged such that the telescopic cylinders 21, 23 are neighboring.
  • This folding is a first folding step, wherein the first jib element 13 and the second jib element 14 are folded concerning the jib connecting unit 17.
  • the folding takes place in a vertical plane around the first jib connecting axis 20 and the second jib connecting axis 22.
  • a second folding step is provided by the jib connecting unit 17 itself.
  • the second folding step provides a folding in a horizontal plane and in particular out of said vertical plane.
  • the jib connecting unit 17 is also called a bi-fold hinge connecting element for a jib boom.
  • the second folding step is illustrated in fig. 6 to 9 .
  • the fixation is released by releasing the bolt fixing the fixing means 45, 46.
  • a 90° rotational transformation position is given in fig. 7 .
  • the second jib connecting element 19 together with the two hinge elements 33 are rotated around the first hinge axis 34 in a counterclockwise direction according to fig. 8 .
  • a final position of the second jib connecting element 19 is illustrated in fig.
  • first jib connecting element 18 and the second jib connecting element 19 are arranged next to each other and parallel to each other. Since the hinge elements 33 are essentially oriented perpendicular to each longitudinal axis of the first jib connecting element 18 and the second jib connecting element 19, both jib connecting elements 18, 19 are disposed to each other with a maximum lateral offset which is identical to the lateral offset D of the hinge axis 34, 35 as indicated in fig. 6 .
  • first jib connecting element 18 and/or the second jib connecting element 19 are provided further pivoting of the first jib connecting element 18 and/or the second jib connecting element 19 concerning the hinge elements 33 such that the lower first booms 36 and the lower second booms 40 are arranged closer to each other and in particular are in contact with each other.
  • first jib connecting element 18 it is possible to pivot the first jib connecting element 18 to the left, wherein the parallel orientation of the first jib connecting element 18 to the second jib connecting element 19 is maintained.
  • Maintaining the parallel orientation of the jib connecting elements 18, 19 means that the corresponding facing sides of the jib connecting elements 18, 19 at which the jib connecting elements 18, 19 are connected in the operation arrangement are oriented parallel to each other.
  • the facing sides of the jib connecting elements 18, 19 may be arranged in different vertical planes having a lateral offset concerning the longitudinal axis 25 which is perpendicular to each of the vertical planes.
  • a margin of an offset in a direction parallel to the longitudinal axis 25 is approximately two times the lateral offset D.
  • the jib connecting elements 18, 19 are arranged to each other such that the hinge element 33 are oriented perpendicular to the longitudinal axis 25.
  • a lateral difference i.e. the margin of the offset in the direction parallel to the longitudinal axis 25 of the vertical plane in both arrangements as already explained above is approximately two times the lateral offset D.
  • FIG. 10 to 15 A further embodiment of a jib connecting unit of a jib according to the invention is illustrated in fig. 10 to 15 . Components that correspond to those as described in previous figs. 1 to 9 have identical reference signs.
  • the jib connecting unit 47 differs from the jib connecting unit 17 essentially in that only one hinge element 48 is provided.
  • the hinge element 48 is provided as a connecting rod, but having an enlarged height along a first hinge axis 49 compared to the connecting rods 33.
  • the single piece hinge element 48 has an enhanced stiffness concerning the two separate hinge elements 33 of the first embodiment.
  • the hinge element 48 is integrated in the jib connecting unit 47 such that the first hinge axis 49 and the second hinge axis 50 intersect not only the lower booms 36, 40 of the corresponding lower boom plane sections, but an intermediate section arranged between two parallel corresponding booms 36 and 40, respectively.
  • a further difference concerning the first embodiment of the jib connecting unit 17 is the upper second plate element 51 which clearly comprises an inclination concerning a horizontal plane.
  • first jib connecting axis 52 and the second jib connecting axis 53 are provided with a height-offset concerning the lower booms 36, 40.
  • the jib connecting axis 52, 53 are arranged in region of the lower boom plane sections.
  • the second folding step i. e. the folding of the jib connecting unit 47 is described concerning figs. 11 to 15 .
  • the fixation of the first fixing means 45 and the second fixing means 46 is released.
  • the hinge element 48 is pivoted around the first hinge axis 49 on the one hand and also around the second hinge axis 50 on the other hand.
  • the second jib connecting element 19 is pivoted together with the hinge element 48 around the first hinge axis 49 in a 90° position ( fig. 14 ).
  • the second jib connecting element 19 is pivoted around the second hinge axis 50 only in a parallel arrangement of the both jib connecting elements ( fig. 15 ).
  • the second embodiment provides an offset of the jib connecting elements relative to each other. However, the amount of the offset is reduced, since the hinge axis 49, 50 are provided deeper inside the corresponding cross sectional areas.
  • FIG. 16 A further embodiment of a jib connecting unit of a jib according to the invention is illustrated in figs. 16 to 20 . Components that correspond to those as described in previous figs. 1 to 15 have identical reference signs.
  • a jib connecting unit 54 comprises one single hinge element 55.
  • the hinge element 55 is attached to the first connecting element 18 and the second jib connecting element 19 such that the first hinge axis 56 and the second hinge axis 57 are provided inside the corresponding lower boom plane sections, respectively.
  • the fixing axis at which the first fixing means 58 and the second fixing means 59 articulated with each other is disposed in an intermediate plane of the jib connecting element 54. Said intermediate plane is vertically oriented and contains the longitudinal axis 25 of the jib 10.
  • the main difference of the jib connecting element 54 regarding previously described embodiments is the hinge element 55. From an upper end a lower horizontally extending plate two positioning pins 60 are vertically extending. The positioning pins 60 are of importance for the transformation procedure as described in the following.
  • the second jib connecting element 19 is articulated with the hinge element 55 around the first hinge axis 56 into the arrangement as shown in fig. 19 .
  • An articulation around the first hinge axis 56 is automatically stopped when one of the positioning pins 60 reaches a corresponding recess 61 of the first jib connecting element 18.
  • further articulation of the hinge element 55 around the first hinge axis 56 counterclockwise is prevented.
  • the second jib connecting element 19 is articulated around the second hinge axis 57 into a position of the transportation arrangement in fig. 20 .
  • FIG. 21 A further embodiment of a jib connecting unit of a jib according to the invention is illustrated in figs. 21 to 27 . Components that correspond to those as described in previous figs. 1 to 20 have identical reference signs.
  • the main difference of the jib connecting unit 62 concerning previously described embodiments is the feature that a first hinge element 63 and a second hinge element 64 are provided, wherein said two hinge elements 63, 64 are articulated at an intermediate hinge axis 65. That means the first hinge element 63 is articulated at the first hinge axis 66 with the first jib connecting element 18. The second hinge element 64 is articulated at the second hinge axis 67 with the second jib connecting element 19. Both hinge elements 63, 64 are pivotally connected with each other around the intermediate hinge axis 65. In the operation arrangement of the jib connecting unit 62 as illustrated in figs.
  • the intermediate hinge axis 65 is coaxially arranged to a fixing axis at which the first fixing means 68 of the first jib connecting element 18 and the second fixing means 69 of the second jib connecting element 19 are fixed with each other.
  • the operation arrangement of the jib connecting unit 62 is also a connecting arrangement in which the first jib connecting element 18 and the second jib connecting element 19 are directly connected to each other.
  • An articulation of the first and the second hinge elements 63, 64 enables an offset arrangement of the jib connecting unit 62 as illustrated in fig. 24 .
  • the offset arrangement provides an axial offset A. the offset is oriented along the longitudinal axis 25.
  • the offset arrangement is reached when the first hinge axis 66, the second hinge axis 67 and the intermediate hinge axis 65 are disposed on straight line 70. Said virtual line 70 is parallel to the longitudinal axis 25.
  • blocking bores 71 which are provided in both, the first hinge element 63 and the second hinge element 64 are coaxially aligned. It is possible to connect the first hinge element 63 and the second hinge element 64 with a non-shown connecting element such as a bolt. Thus, the first hinge element 63 and the second hinge element 64 are connected with each other at the intermediate hinge axis 65 and at the blocking bores 71.
  • first hinge element 63 and the second hinge element 64 together build a common hinge element 63, 64 which comprises enhanced stiffness concerning the first hinge element 63 and the second hinge element 64 articulated at the intermediate hinge axis 65.
  • the intermediate hinge axis 65, the blocking bores 71 and the second fixing means 69 are arranged on a line 72 which essentially perpendicular to the line 70 and the longitudinal axis 25. However, it is not necessary to provide such aligned arrangement.
  • a further transformation of the jib connecting unit 62 is enabled using the blocked common hinge element 63, 64.
  • the second jib connecting element 19 is articulated at the second hinge axis 67 counterclockwise.
  • the second jib connecting element 19 together with the common hinge element 63, 64 is articulated at the first hinge axis 66 counterclockwise relative to the first jib connecting element 18.
  • the second jib connecting element 19 is articulated at the second hinge axis 67 counterclockwise such that the first jib connecting element 18 and the second jib connecting element 19 are oriented parallel, i. e. such that the lower booms 36 and 40 are oriented parallel.
  • the common hinge element 63, 64 it is possible to arrange the common hinge element 63, 64 in a position such that the line 70 is not perpendicular to the longitudinal axis 25.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Jib Cranes (AREA)
EP20120184577 2012-09-14 2012-09-14 Zusammenklappbarer Ausleger für einen Kran und Kran Not-in-force EP2708488B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20120184577 EP2708488B1 (de) 2012-09-14 2012-09-14 Zusammenklappbarer Ausleger für einen Kran und Kran
EP20130165293 EP2711328B1 (de) 2012-09-14 2012-09-14 Zusammenklappbarer Ausleger für einen Kran und Kran

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20120184577 EP2708488B1 (de) 2012-09-14 2012-09-14 Zusammenklappbarer Ausleger für einen Kran und Kran

Related Child Applications (2)

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EP20130165293 Division-Into EP2711328B1 (de) 2012-09-14 2012-09-14 Zusammenklappbarer Ausleger für einen Kran und Kran

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EP2708488B1 EP2708488B1 (de) 2014-11-05

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EP20130165293 Not-in-force EP2711328B1 (de) 2012-09-14 2012-09-14 Zusammenklappbarer Ausleger für einen Kran und Kran

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104340882A (zh) * 2014-09-25 2015-02-11 中联重科股份有限公司 折叠臂架和起重机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2594427A1 (fr) * 1985-11-22 1987-08-21 Ferreri Andrea Bras pour grue
DE9316113U1 (de) * 1993-10-21 1995-02-16 Liebherr Werk Biberach Gmbh Turmdrehkran
EP0870726B1 (de) 1997-04-11 2002-08-07 Potain Selbstaufrichtender Kran mit seitlich zusammenklappbarem Ausleger in der Transportstellung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2594427A1 (fr) * 1985-11-22 1987-08-21 Ferreri Andrea Bras pour grue
DE9316113U1 (de) * 1993-10-21 1995-02-16 Liebherr Werk Biberach Gmbh Turmdrehkran
EP0870726B1 (de) 1997-04-11 2002-08-07 Potain Selbstaufrichtender Kran mit seitlich zusammenklappbarem Ausleger in der Transportstellung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104340882A (zh) * 2014-09-25 2015-02-11 中联重科股份有限公司 折叠臂架和起重机

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EP2711328B1 (de) 2015-05-13
EP2711328A1 (de) 2014-03-26
EP2708488B1 (de) 2014-11-05

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