EP0331856B1 - Zusammenlegbarer Kran mit automatischer und schneller Aufrichtung - Google Patents
Zusammenlegbarer Kran mit automatischer und schneller Aufrichtung Download PDFInfo
- Publication number
- EP0331856B1 EP0331856B1 EP88420074A EP88420074A EP0331856B1 EP 0331856 B1 EP0331856 B1 EP 0331856B1 EP 88420074 A EP88420074 A EP 88420074A EP 88420074 A EP88420074 A EP 88420074A EP 0331856 B1 EP0331856 B1 EP 0331856B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jib
- foot
- mast
- point
- articulated
- 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.)
- Expired - Lifetime
Links
Images
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
- B66C23/54—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 with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors
- B66C23/545—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 with pneumatic or hydraulic motors, e.g. for actuating jib-cranes on tractors with arrangements for avoiding dead centre problems during cylinder motion
Definitions
- the present invention relates to a transportable crane whose folding and deployment can be carried out quickly in a fully automatic manner. It relates more particularly, although not exclusively, to a crane whose boom, itself collapsible, has in the deployed position, a relatively large overall length.
- the problem of the folding crane is twofold.
- the overall dimensions of the crane should be compatible with the size limits fixed by the Highway Code, which allows rapid transport in ordinary road traffic.
- the crane once deployed in the working position on the site, the crane must have a mast as high as possible and a boom with maximum reach.
- the folding and deployment operations must be as simple as possible and take place quickly.
- a first approached solution to this problem is known, for example from French patent 2,548,646.
- This known system provides for a mast in two parts (mast foot and mast head) on which is articulated an arrow, also in two parts (arrowhead and arrowhead).
- a single cylinder allows the deployment and folding of the assembly to be controlled, thanks to an articulated rear link and a rear cable extended by a stay cable.
- the circulation of this rear cable is guided by a system of pulleys and articulated punches which are in the area where the jib foot is articulated on the top of the mast head.
- This known device however has the drawback of considerably limiting the maximum length that can be used for the element forming the arrowhead. Indeed, during the deployment maneuver, the arrowhead moves away from the arrowhead against the underside of which it was folded, and this as the arrowhead in turn lifts up. above the masthead on the top of which it is articulated. Thus, from the start of the deployment operation, the end of the arrowhead moves along the masthead, in the immediate vicinity thereof that it sweeps in the longitudinal direction.
- the object of the present invention is to avoid these drawbacks by producing a folding crane of the aforementioned type, the element of which forms the arrowhead has a useful length substantially equal to that of the element which forms the boom foot.
- the invention aims to produce such a foldable crane whose deployment is carried out fully automatically in a very short time and with a small footprint.
- a folding crane comprises a lifting mast on the top of which is articulated in an axis a jib foot whose end carries the articulation axis of an arrow point, while a cable system allows to control the deployment of the boom and the mast, and it is characterized in that, moreover, there is provided between the arrowhead and the mast, a cable of constant length, wrapped between two sets of pulleys whose variable spacing is controlled positively by means successively causing its increase and then its decrease throughout the deployment maneuver or the folding maneuver, which has the effect of delaying the opening speed of the angle of the jib foot / arrowhead in beginning of deployment of the crane, whereas on the contrary, at the end of deployment, when the jib foot has already moved away from the head of the mast, the speed of unfolding of the jib tip until it is aligned with c the boom foot is increased.
- the first set of pulleys of the hauling system is situated at the rear of the articulation of the jib foot on the top of the mast.
- the second set of pulleys of hauling is arranged transversely to slide in a substantially longitudinal slide, integral with the head of the mast.
- the mast and the boom rise in a small footprint.
- the variable reeving device controlled by the articulation of the boom foot, makes it possible during the first phase of lifting the boom, to prevent the opening of the point by cable compensation.
- this allows the opening of the arrowhead on the boom foot when the angle of the mast and the boom foot reaches then exceeds a value of about 45 degrees. Therefore, the unfolding is carried out quickly without the arrowhead coming up against the mast.
- This compensation and variability hauling system makes it possible to automate the unfolding, and above all to fold a maximum length for transport in a minimum road gauge.
- the crane illustrated in the drawings comprises a base 1, on which is articulated, at 2, a mast base element 3.
- the top of the latter carries, at the rear, an axis 4, on which the base is articulated of a mast head element 5.
- the top of the latter carries an axis 6, on which a rigid bridge 7 is articulated, integral with the rear end 8 of a jib foot element 9.
- the jib foot 10 carries a lower axis 11, where the rear of an arrowhead element 12 is articulated.
- a constant length cable 13 is provided between the arrowhead 12 and the mast 3, 5 which it connects. This cable 13 is mouflaged between two pulley trains 14 and 15, the spacing 16 ( Figure 6) is variable.
- the first set of pulleys 14 has its axis 17 located at the rear of the articulation 6. It is carried by the rigid bridge 7 which rocks around the axis 6.
- the second train of pulleys 15 has its axis 18 which is arranged transversely in a substantially longitudinal slide 19, integral with the mast head 5.
- a pusher 20 On the transverse axis 18, is articulated one end of a pusher 20 which is perpendicular thereto.
- the other end of the pusher 20 is articulated at 21 on the head of a connecting rod 22, the foot of which pivots about 1 ′ axis 6, at the same time as the bridge 7, of which this connecting rod 22 is rigidly secured.
- the cable 13 passes over a pulley 23, carried by the rear 8 of the jib foot 9, then over a pulley 24, carried by the lower chord of the jib foot 9 before the axis 11, to finally anchor at 25, on the arrowhead 12.
- this device makes it possible to give the jib tip element 12, a length 37 which may be greater than 85% of the length 38 of the jib foot 9.
- the opening of the angle 39 between the jib foot 9 and arrowhead 12 is delayed at the start of deployment of the crane ( Figures 3 and 4), to be instead accelerated at the end ( Figures 7 and 8).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Jib Cranes (AREA)
Claims (7)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP88420074A EP0331856B1 (de) | 1988-03-02 | 1988-03-02 | Zusammenlegbarer Kran mit automatischer und schneller Aufrichtung |
DE8888420074T DE3865835D1 (de) | 1988-03-02 | 1988-03-02 | Zusammenlegbarer kran mit automatischer und schneller aufrichtung. |
AT88420074T ATE68772T1 (de) | 1988-03-02 | 1988-03-02 | Zusammenlegbarer kran mit automatischer und schneller aufrichtung. |
ES198888420074T ES2027030T3 (es) | 1988-03-02 | 1988-03-02 | Grua plegable con desplegado rapido automatico. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP88420074A EP0331856B1 (de) | 1988-03-02 | 1988-03-02 | Zusammenlegbarer Kran mit automatischer und schneller Aufrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0331856A1 EP0331856A1 (de) | 1989-09-13 |
EP0331856B1 true EP0331856B1 (de) | 1991-10-23 |
Family
ID=8200461
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88420074A Expired - Lifetime EP0331856B1 (de) | 1988-03-02 | 1988-03-02 | Zusammenlegbarer Kran mit automatischer und schneller Aufrichtung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0331856B1 (de) |
AT (1) | ATE68772T1 (de) |
DE (1) | DE3865835D1 (de) |
ES (1) | ES2027030T3 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4315960A1 (de) * | 1993-05-12 | 1994-11-17 | Liebherr Werk Biberach Gmbh | Kran mit teleskopierbarem Turm |
FR2790252B1 (fr) * | 1999-02-26 | 2001-04-06 | Potain Sa | Dispositif de depliage ou repliage simultane d'elements de pointe de fleche de grue |
EP1084982A1 (de) * | 1999-09-17 | 2001-03-21 | Liebherr-Werk Biberach GmbH | Turmdrehkran |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES473431A1 (es) * | 1978-09-16 | 1979-04-16 | Pingon Int | Perfeccionamientos introducidos en gruas plegables de monta-je rapido. |
IT7921661V0 (it) * | 1979-05-24 | 1979-05-24 | San Marco Spa | Gru a torre telescopica con braccio snodato ad estensione automatica. |
IT1164241B (it) * | 1983-05-25 | 1987-04-08 | Luigi Cattaneo Spa | Gru articolata ad innalzamento automatico |
FR2548646B1 (fr) * | 1983-07-05 | 1985-12-13 | Cadillon | Grue repliable a deploiement rapide |
DE3441573A1 (de) * | 1984-11-14 | 1986-05-15 | Peiner Hebe- Und Transportsysteme Gmbh, 5500 Trier | Turmkran mit geteiltem ausleger |
IT1185969B (it) * | 1985-10-02 | 1987-11-18 | Cattaneo Luigi Spa | Gru articolata con innalzamento della torre ed estensione del braccio automatici |
-
1988
- 1988-03-02 DE DE8888420074T patent/DE3865835D1/de not_active Expired - Lifetime
- 1988-03-02 ES ES198888420074T patent/ES2027030T3/es not_active Expired - Lifetime
- 1988-03-02 EP EP88420074A patent/EP0331856B1/de not_active Expired - Lifetime
- 1988-03-02 AT AT88420074T patent/ATE68772T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2027030T3 (es) | 1992-05-16 |
EP0331856A1 (de) | 1989-09-13 |
DE3865835D1 (de) | 1991-11-28 |
ATE68772T1 (de) | 1991-11-15 |
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