FR2295903A1 - Ship yard crane crab travel mechanism - uses forces generated by load variations to move crab along jib - Google Patents

Ship yard crane crab travel mechanism - uses forces generated by load variations to move crab along jib

Info

Publication number
FR2295903A1
FR2295903A1 FR7443219A FR7443219A FR2295903A1 FR 2295903 A1 FR2295903 A1 FR 2295903A1 FR 7443219 A FR7443219 A FR 7443219A FR 7443219 A FR7443219 A FR 7443219A FR 2295903 A1 FR2295903 A1 FR 2295903A1
Authority
FR
France
Prior art keywords
crab
jib
move
travel mechanism
forces generated
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
FR7443219A
Other languages
French (fr)
Other versions
FR2295903B3 (en
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.)
ROCK SA
Original Assignee
ROCK SA
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 ROCK SA filed Critical ROCK SA
Priority to FR7443219A priority Critical patent/FR2295903A1/en
Publication of FR2295903A1 publication Critical patent/FR2295903A1/en
Application granted granted Critical
Publication of FR2295903B3 publication Critical patent/FR2295903B3/fr
Granted 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
    • B66C11/00—Trolleys or crabs, e.g. operating above runways
    • B66C11/16—Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear
    • B66C11/20—Arrangements, e.g. comprising differential gears, enabling simultaneous or selective operation of travelling and hoisting gear; Arrangements using the same rope or cable for both travelling and hoisting, e.g. in Temperley cranes
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Jib Cranes (AREA)

Abstract

The mechanism moves the crap or a shipyard crane along the jib, without using any forces other than those generated by the variations in the loads lifted. There may be specially reeved ropes and pulleys moving the crab towards the jib head when under load, the crab (3) being pulled back towards the tower (10) by a counterweight (9) previously raised by the crab travelling outwards. There may be a drum with brake controlling the crab movement in both directions. The hoist rope (1) is reeved round the pulleys on crab and hoist block (4), and them round a further pulley (2) at the jib head to the anchor point, to effect the crab travel movement.
FR7443219A 1974-12-26 1974-12-26 Ship yard crane crab travel mechanism - uses forces generated by load variations to move crab along jib Granted FR2295903A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7443219A FR2295903A1 (en) 1974-12-26 1974-12-26 Ship yard crane crab travel mechanism - uses forces generated by load variations to move crab along jib

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7443219A FR2295903A1 (en) 1974-12-26 1974-12-26 Ship yard crane crab travel mechanism - uses forces generated by load variations to move crab along jib

Publications (2)

Publication Number Publication Date
FR2295903A1 true FR2295903A1 (en) 1976-07-23
FR2295903B3 FR2295903B3 (en) 1978-06-30

Family

ID=9146734

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7443219A Granted FR2295903A1 (en) 1974-12-26 1974-12-26 Ship yard crane crab travel mechanism - uses forces generated by load variations to move crab along jib

Country Status (1)

Country Link
FR (1) FR2295903A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398015A1 (en) * 1977-07-22 1979-02-16 Acme Controlling trolley for tower crane boom - has pulleys for lifting and trolley cables joined together to form single mobile tensioner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398015A1 (en) * 1977-07-22 1979-02-16 Acme Controlling trolley for tower crane boom - has pulleys for lifting and trolley cables joined together to form single mobile tensioner

Also Published As

Publication number Publication date
FR2295903B3 (en) 1978-06-30

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