EP2062843A1 - Abklappbarer Verbindungsarm bei einer Anordnung von nebeneinander liegenden Spreizern - Google Patents

Abklappbarer Verbindungsarm bei einer Anordnung von nebeneinander liegenden Spreizern Download PDF

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Publication number
EP2062843A1
EP2062843A1 EP07121134A EP07121134A EP2062843A1 EP 2062843 A1 EP2062843 A1 EP 2062843A1 EP 07121134 A EP07121134 A EP 07121134A EP 07121134 A EP07121134 A EP 07121134A EP 2062843 A1 EP2062843 A1 EP 2062843A1
Authority
EP
European Patent Office
Prior art keywords
spreader
arm
arm section
pivot
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.)
Withdrawn
Application number
EP07121134A
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English (en)
French (fr)
Inventor
Benny NORDSTRÖM
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.)
Bromma Conquip AB
Original Assignee
Bromma Conquip AB
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 Bromma Conquip AB filed Critical Bromma Conquip AB
Priority to EP07121134A priority Critical patent/EP2062843A1/de
Publication of EP2062843A1 publication Critical patent/EP2062843A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/101—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means for containers
    • B66C1/104—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means for containers for two or more containers side by side

Definitions

  • the present invention relates to arrangements on spreaders, and more specifically to connecting arms between spreaders in side by side lift operations.
  • the invention specifically refers to a hinged connecting arm and a method for connecting and disconnecting first and second spreaders in side by side lift operations.
  • the expression "spreader” refers to a structure adapted for shifting containers from one location to another.
  • the spreader is adapted for lifting and lowering operations driven by a crane from which the spreader is suspended in ropes.
  • the ropes are guided in rope sheaves to run from a crane drive to the spreader, via a trolley that is movable on rails in the upper crane structure.
  • the ropes attach to the spreader through rope sheaves which are journalled in the upper end of the spreader.
  • the lower end of the spreader includes coupling means for connecting the spreader to corner casings arranged on a container to be shifted.
  • the coupling means may be supported from extendable frames or beam structures that can be detachably coupled to a spreader head-block, in which the rope sheaves are journalled.
  • a spreader head-block in which the rope sheaves are journalled.
  • the expression spreader shall thus be understood to encompass the separate head-block, and when appropriate also the head-block and coupling structures in combination.
  • the literature contains several examples of spreaders that are interconnectable in side by side lift operations, i.e. shifting operations wherein two or more containers are handled simultaneously by spreaders that are interconnected side by side.
  • the connecting means between the spreaders are typically realized as arms, which are journalled in both ends for some degree of movement in order to compensate for un-parallelism between the containers.
  • the arms are typically hydraulically powered to permit control of the relative position of spreaders/containers during shifting operations.
  • the connecting arms may be telescopically extendable, such as exemplified in US 2006/0243724 A1 , or hinged as exemplified in WO 03/ 104132 .
  • the ability to accommodate for spatial separation of the spreaders is of course limited, and in case of a non-admissible separation, there is a risk that the arms or connecting structures and journals get damaged.
  • the risk for damage is at the largest during lift and lowering into the load compartment of a ship, wherein non-admissible vertical separation of the spreaders may result if one of the spreaders, or its associated container, gets jammed in vertical lowering guides while the other is free to move in the adjacent, corresponding guides.
  • the present invention aims at avoiding the risk of damages to the connecting structures between interconnected spreaders, such as damages resulting from non-admissible spatial separation of the spreaders in side by side lift operations.
  • an arrangement which detachably interconnects a first and a second spreader in side by side lift operations, the arrangement comprising a first arm section which is connected and pivotally journalled to the first spreader, a second arm section connected and pivotally journalled to the second spreader, wherein the first and second arm sections are pivotally interconnected through a hinged connection.
  • the arrangement is characterized in that the hinged connection comprises separable hinge components, arranged for enforced but controlled separation of the hinge components and disconnection of the first arm section from the second arm section in result of a non-admissible angular position between the first and second arm sections.
  • hinged connection is actively controllable for connection and disconnection, respectively, of the first and second arm sections.
  • the hinge comprises a pivot pin arranged in the free end of a first arm section, the pivot pin receivable in a pivot bearing arranged in the free end of a second arm section, wherein the pivot bearing includes a first bearing part which is pivotally journalled relative to a second bearing part and pivotable between open and closed positions, respectively.
  • the first and second bearing parts in a closing position, are biased towards each other through the action of an elastic holding member.
  • the first arm section comprises a passive actuator arranged to cause the first bearing part to pivot relative to the second bearing part in result of the first and second arm sections reaching a non-admissible angular position.
  • a powered actuator is preferably associated with the hinge and operable for pivoting of the first bearing part relative to the second bearing part, the actuator being controllable for actively connecting the hinge components in side by side lift operations, as well as for actively disconnecting the hinge components in single lift operations.
  • the first and second arm sections are each individually driven and controllable to pivot about horizontal axes in connected and disconnected modes, and controllable in disconnected mode by means of powered actuators for mating the hinge components in a connecting operation, as well as controllable in connected mode for separation of the hinge components in a disconnecting operation.
  • the first and second arm sections may be arranged on rotary drives supported on the first and second spreaders, respectively.
  • the new arrangement of a connecting arm results in a new procedure for connecting a first spreader to a second spreader in side by side lift operations, comprising the following steps:
  • the method further comprises some or all of the following steps:
  • horizontal refers to a planar horizontal projection of a spreader
  • vertical refers to any normal to the horizontal projection
  • a first and a second spreader 1, 2 are shown in side by side lift operation.
  • the spreaders 1, 2 are each suspended in ropes 3 from a rope crane (not shown) and operated for shifting containers from one location to another.
  • the ropes connect to an upper end of a spreader, typically via rope sheaves 4 which are journalled for rotation in a head-block comprised in the spreader structure.
  • twist locks 5 are supported and operative as coupling means for coupling and uncoupling, respectively, of the spreader and a container to be shifted.
  • one of the spreaders is inactive.
  • the first and second spreaders are together operated in lifting/lowering and shifting operations.
  • first and second spreaders are detachably interconnected by means of a connecting arm 10. More precisely, a pair of connecting arms 10 are typically provided and separated by a distance in the longitudinal extension of the spreader.
  • the connecting arm 10 is a hinged arm, comprising a first arm section 10 pivotally connected to a second arm section 10'.
  • the first arm section 10 is connected and journalled to the first spreader and the second arm section 10' is connected and journalled to the second spreader.
  • the arm sections 10 and 10' connect pivotally to the spreaders about vertical axes for accommodation of longitudinal displacements and un-parallelism between the interconnected spreaders in horizontal planes. Additionally, the arm sections 10 and 10' connect pivotally to the spreaders about horizontal axes for accommodation of lateral and vertical displacements and un-parallelism between the interconnected spreaders. Extension/retraction and pivoting about the vertical and horizontal axes may be realized through actuators as is common technology.
  • the actuators are controllable for manoeuvring the interconnected spreaders during shifting of containers, and may be hydraulically or electrically operated.
  • first and second arm sections 10 and 10' are mutually interconnected through a hinged pivot connection 11.
  • first and second arm sections are disconnected by means of the hinge 11 comprising separable hinge components.
  • Fig. 2 is a cut out portion of the connecting arm 10 in connecting mode, showing the hinged pivot connection 11 in a sectional view.
  • a pivot pin 12 is arranged in the free end of the first arm section 10, the pivot pin extending in a horizontal orientation.
  • a pivot bearing, generally designated 13, is correspondingly arranged in the free end of the arm section 10' to receive and mate with the pivot pin 12 in connecting mode.
  • the pivot bearing 13 comprises a first bearing part 14 which is pivotally arranged relative to a second bearing part 15.
  • the second bearing part 15 is fixedly arranged in the extreme end of the second arm section 10'.
  • the first bearing part is journalled pivotally relative to the second bearing part through a pivot 16.
  • the first and second bearing parts each comprise a semicircular seat 17 and 18, respectively.
  • the semicircular seats 17, 18 provide a journal for the pivot pin 12 as the first bearing part 14 is pivoted into a closing/connecting position.
  • a spring member 19 is arranged on the second arm section 10' to act upon the bearing part 14, urging the same towards the other bearing part 15 and into the closed condition illustrated in fig. 2 .
  • Fig. 3 is a sectional view corresponding to fig. 2 , showing the hinged pivot connection 11 in an enforced disconnecting mode.
  • the enforced separation of hinge components, wherein the pivot pin 12 is automatically released from the pivot bearing 13 without interference from the crane operator, will be further explained below as an emergency release in case of non-admissible angular separation between the arm sections 10, 10'.
  • fig. 3 also serves to illustrate an actively controlled separation of the hinge components.
  • An actuator 20 is arranged and controllable to act upon the first bearing part 14, urging the same to pivot towards the open position illustrated in fig. 3 , against the biasing force of the spring member 19.
  • Actuating power is controlled by the crane operator and supplied to actuator 20 from the spreader on which the corresponding arm section 10' is journalled. The actuator is thus extendable from the retracted position shown in figs. 2 and 3 , to the extended position shown in broken lines at 20' in fig. 3 .
  • the first and second arm sections 10, 10' are supported on the associated spreader to pivot about horizontal pivot axis 21 and 22, respectively. Pivoting is controlled by the crane operator, in the illustrated embodiment through rotary drives 23 and 24 to which the corresponding arm sections are connected.
  • the rotary drives are powered for pivoting the arm sections 10, 10' towards each other until their free and outer ends meet and the pivot pin 12 mates with the pivot bearing 13. Mating is assisted through a slanting surface 25 on the first arm section, by which the pivoting bearing part 14 of the second arm section is guided towards a mating contact with the pivot pin 12 as the second arm section is pivoted upwards at the end of the mating movement.
  • connection is completed by disabling the actuator 20, the seat 17, 18 then closing about the pivot pin through the action of the spring member 19.
  • one or both of the arms can be set into a free float condition by non-energizing the corresponding actuator/ rotary drive.
  • the purpose of the release mechanism is to protect the connecting arm and associated journal bearing structures in the arm and on the spreaders from damages caused by incidental and non-admissible angular separation of the arm sections 10 and 10' in the connected mode.
  • the emergency release includes an enforced but controlled disconnection and opening of the seat 17, 18 when an angular distance or opening angle ⁇ between the arm sections reaches a predetermined magnitude.
  • the automatic disconnection is effectuated by a passive actuator 26 supported on the first arm section 10. As the admissible angular separation between the arm sections reaches beyond its maximum, illustrated in fig.
  • the actuator 26 acts upon the pivoting bearing part 14 so as to cause said bearing part to pivot, against the action of the spring member 19, as illustrated in fig. 4c .
  • the actuator 26 projects from the outer end of arm section 10, reaching past the pivot axis to act upon a heel 27 formed on the pivoting bearing part 14.
  • any suitable elastic holding member can be used in exchange for the biasing spring member 19.
  • the bearing parts 14, 15 need not be shaped as true semi-circular seats for a complete 360° enclosure of the pivot pin in the closed condition, as long as a satisfactory journal is provided.
  • the passive actuator 25 which enforces the controlled and non-destructive separation of the hinge components may have other shape then the illustrated.
  • the actuator 20, which is controllable and involved in the active connection and disconnection of the arm sections may alternatively be supported in the corresponding arm section to act on the pivoting bearing part via a link mechanism, if appropriate.
  • the enforced separation of the hinge components in emergency release may alternatively rely on sensors that detect continuously the opening angle between the arm sections, and which control the powered actuator for separation of the hinge components without the interference of the crane operator in case of a non-admissible angular position being reached.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
EP07121134A 2007-11-20 2007-11-20 Abklappbarer Verbindungsarm bei einer Anordnung von nebeneinander liegenden Spreizern Withdrawn EP2062843A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07121134A EP2062843A1 (de) 2007-11-20 2007-11-20 Abklappbarer Verbindungsarm bei einer Anordnung von nebeneinander liegenden Spreizern

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07121134A EP2062843A1 (de) 2007-11-20 2007-11-20 Abklappbarer Verbindungsarm bei einer Anordnung von nebeneinander liegenden Spreizern

Publications (1)

Publication Number Publication Date
EP2062843A1 true EP2062843A1 (de) 2009-05-27

Family

ID=39205137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07121134A Withdrawn EP2062843A1 (de) 2007-11-20 2007-11-20 Abklappbarer Verbindungsarm bei einer Anordnung von nebeneinander liegenden Spreizern

Country Status (1)

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EP (1) EP2062843A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1302245A (de) * 1970-02-23 1973-01-04
WO2003104132A1 (en) * 2002-06-01 2003-12-18 Stinis Beheer B.V. Hoisting frame and method for its use
EP1857401A1 (de) * 2006-05-19 2007-11-21 Bromma Conquip Ab Spreizer Vorrichtung und Positionierung Mitteln
WO2007136352A1 (en) * 2006-05-22 2007-11-29 Nsl Engineering Pte Ltd Spreader spacing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1302245A (de) * 1970-02-23 1973-01-04
WO2003104132A1 (en) * 2002-06-01 2003-12-18 Stinis Beheer B.V. Hoisting frame and method for its use
EP1857401A1 (de) * 2006-05-19 2007-11-21 Bromma Conquip Ab Spreizer Vorrichtung und Positionierung Mitteln
WO2007136352A1 (en) * 2006-05-22 2007-11-29 Nsl Engineering Pte Ltd Spreader spacing device

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