FR2236771A1 - Telescopic crane jib section locking system - incorporates locking cam actuated by load application - Google Patents

Telescopic crane jib section locking system - incorporates locking cam actuated by load application

Info

Publication number
FR2236771A1
FR2236771A1 FR7324441A FR7324441A FR2236771A1 FR 2236771 A1 FR2236771 A1 FR 2236771A1 FR 7324441 A FR7324441 A FR 7324441A FR 7324441 A FR7324441 A FR 7324441A FR 2236771 A1 FR2236771 A1 FR 2236771A1
Authority
FR
France
Prior art keywords
load application
cam actuated
incorporates
crane jib
telescopic crane
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
FR7324441A
Other languages
French (fr)
Other versions
FR2236771B1 (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 FR7324441A priority Critical patent/FR2236771A1/en
Publication of FR2236771A1 publication Critical patent/FR2236771A1/en
Application granted granted Critical
Publication of FR2236771B1 publication Critical patent/FR2236771B1/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
    • 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
    • B66C23/346—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes with locking devices
    • 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
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Jib Cranes (AREA)

Abstract

The two telescopic sections of the hib are locked together by utilising the effect of the load applied to one member to operate a locking cam (1). A slide can be compressed or a stirrup placed under tension, the mechanism being automatically released when unloaded to allow adjustment. The stirrup has a pair of blocks which bear on one of the telescopic sections when actuated and springs ensure that the blocks are released when the load is removed. Spring similarly ensure that if a alide is used locking action is effected under load.
FR7324441A 1973-07-03 1973-07-03 Telescopic crane jib section locking system - incorporates locking cam actuated by load application Granted FR2236771A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7324441A FR2236771A1 (en) 1973-07-03 1973-07-03 Telescopic crane jib section locking system - incorporates locking cam actuated by load application

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7324441A FR2236771A1 (en) 1973-07-03 1973-07-03 Telescopic crane jib section locking system - incorporates locking cam actuated by load application

Publications (2)

Publication Number Publication Date
FR2236771A1 true FR2236771A1 (en) 1975-02-07
FR2236771B1 FR2236771B1 (en) 1978-07-21

Family

ID=9122010

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7324441A Granted FR2236771A1 (en) 1973-07-03 1973-07-03 Telescopic crane jib section locking system - incorporates locking cam actuated by load application

Country Status (1)

Country Link
FR (1) FR2236771A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2513978A1 (en) * 1981-10-02 1983-04-08 Coles Cranes Ltd TELESCOPIC ARROW AND LIFT APPARATUS HAVING THE SAME
EP0849212A1 (en) * 1996-12-20 1998-06-24 Kidde Industries, Inc. Device and method for arresting sections of a telescopic jib

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1590629A (en) * 1968-05-14 1970-04-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1590629A (en) * 1968-05-14 1970-04-20

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2513978A1 (en) * 1981-10-02 1983-04-08 Coles Cranes Ltd TELESCOPIC ARROW AND LIFT APPARATUS HAVING THE SAME
EP0849212A1 (en) * 1996-12-20 1998-06-24 Kidde Industries, Inc. Device and method for arresting sections of a telescopic jib
US6062404A (en) * 1996-12-20 2000-05-16 Grove U.S. L.L.C. Device and method for arresting sections of a telescopic jib

Also Published As

Publication number Publication date
FR2236771B1 (en) 1978-07-21

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Legal Events

Date Code Title Description
ST Notification of lapse