GB1392223A - Crane with level-luffing jib - Google Patents

Crane with level-luffing jib

Info

Publication number
GB1392223A
GB1392223A GB1637172A GB1637172A GB1392223A GB 1392223 A GB1392223 A GB 1392223A GB 1637172 A GB1637172 A GB 1637172A GB 1637172 A GB1637172 A GB 1637172A GB 1392223 A GB1392223 A GB 1392223A
Authority
GB
United Kingdom
Prior art keywords
cam
luffing
disc
lifting
pointer
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
Application number
GB1637172A
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.)
HILGERS AG
Original Assignee
HILGERS AG
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 HILGERS AG filed Critical HILGERS AG
Publication of GB1392223A publication Critical patent/GB1392223A/en
Expired legal-status Critical Current

Links

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
    • B66C23/06—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 jibs mounted for jibbing or luffing movements
    • B66C23/08—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 jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths
    • B66C23/10—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 jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths the paths being substantially horizontal; Level-luffing jib-cranes
    • B66C23/12—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 jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths the paths being substantially horizontal; Level-luffing jib-cranes with means for automatically varying the effective length of the hoisting rope or cable

Abstract

1392223 Level-luffing jib cranes HILGERS AG 10 April 1972 [8 April 1971] 16371/72 Heading B8B [Also in Division G3] A device for obtaining a horizontal load movement in a luffing jib crane comprises a cam disc 4 moved by a cord 17 from the luffing mechanism and coupled by a shaft 18 to a potentiometer 19. A circular disc 7 is similarly actuated by a cord 20 connected to the lifting mechanism and is coupled by a shaft 24 to a potentiometer 22. The potentiometers 19, 22 are connected in a bridge circuit. As long as the lifting and luffing mechanisms operate at the correct speed ratio relative to one another, the bridge circuit is in balance. If this balance is disturbed a control signal is produced at the output of the bridge circuit, which is used to control the lifting winch so as to obtain horizontal load movement. In a modification (not shown), the cam 4 is circular, the resistance of one or both potentiometers 19, 22 providing the necessary information. In a further embodiment, Figs. 2A, 2B (not shown) a control disc (7) has two conductive areas separated by a neutral, insulating gap. The disc (7) is rotated by the luffing mechanism via a cam (4) while a pointer (12) is rotated by the lifting mechanism. As long as the pointer (12) is in the gap no signal is produced, but should the pointer (12) leave the gap it encounters positive or negative voltage producing a control signal for the lifting winch. The cam 4 may be designed to rotate several times and may compensate for the resilient deformations of the crane for a medium load. A suitable set of cam discs may be provided for the lengths of jib provided.
GB1637172A 1971-04-08 1972-04-10 Crane with level-luffing jib Expired GB1392223A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712117420 DE2117420A1 (en) 1971-04-08 1971-04-08 Method for achieving a horizontal load path on cranes and devices for carrying out the method

Publications (1)

Publication Number Publication Date
GB1392223A true GB1392223A (en) 1975-04-30

Family

ID=5804345

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1637172A Expired GB1392223A (en) 1971-04-08 1972-04-10 Crane with level-luffing jib

Country Status (10)

Country Link
JP (1) JPS4849151A (en)
AT (1) AT326312B (en)
BE (1) BE781803A (en)
CH (1) CH548946A (en)
DE (1) DE2117420A1 (en)
FR (1) FR2132749B1 (en)
GB (1) GB1392223A (en)
IT (1) IT960308B (en)
NL (1) NL7204078A (en)
SE (1) SE395262B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2796058A1 (en) * 1999-07-07 2001-01-12 Liebherr Werk Ehingen PROCESS AND DEVICE FOR ACTUATING THE LOAD HOOK OF A CRANE AND MORE PARTICULARLY FOR CHANGING THE POSITION THEREOF

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112850484A (en) * 2020-12-30 2021-05-28 芜湖造船厂有限公司 Double-lifting-tool bridge crane coupling structure and calculation method of coupling torque thereof
JP7409406B2 (en) * 2022-02-17 2024-01-09 コベルコ建機株式会社 crane control method, crane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2796058A1 (en) * 1999-07-07 2001-01-12 Liebherr Werk Ehingen PROCESS AND DEVICE FOR ACTUATING THE LOAD HOOK OF A CRANE AND MORE PARTICULARLY FOR CHANGING THE POSITION THEREOF
GB2353515A (en) * 1999-07-07 2001-02-28 Liebherr Werk Ehingen Controlling the path of a crane hook
GB2353515B (en) * 1999-07-07 2003-09-10 Liebherr Werk Ehingen A method and an apparatus for the operation of a crane load hook

Also Published As

Publication number Publication date
NL7204078A (en) 1972-10-10
AT326312B (en) 1975-12-10
SE395262B (en) 1977-08-08
ATA226372A (en) 1975-02-15
FR2132749A1 (en) 1972-11-24
CH548946A (en) 1974-05-15
IT960308B (en) 1973-11-20
BE781803A (en) 1972-07-31
DE2117420A1 (en) 1972-10-12
FR2132749B1 (en) 1976-08-06
JPS4849151A (en) 1973-07-11

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee