US3554385A - Safety bolt - Google Patents

Safety bolt Download PDF

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Publication number
US3554385A
US3554385A US773799A US3554385DA US3554385A US 3554385 A US3554385 A US 3554385A US 773799 A US773799 A US 773799A US 3554385D A US3554385D A US 3554385DA US 3554385 A US3554385 A US 3554385A
Authority
US
United States
Prior art keywords
jibs
main girder
trolley
rails
bolts
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
Application number
US773799A
Other languages
English (en)
Inventor
Fredrik Munck
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.)
MUNCK INTERNATIONAL
Original Assignee
MUNCK INTERNATIONAL
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 MUNCK INTERNATIONAL filed Critical MUNCK INTERNATIONAL
Application granted granted Critical
Publication of US3554385A publication Critical patent/US3554385A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B66C7/00—Runways, tracks or trackways for trolleys or cranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/01—General aspects of mobile cranes, overhead travelling cranes, gantry cranes, loading bridges, cranes for building ships on slipways, cranes for foundries or cranes for public works
    • B66C2700/012—Trolleys or runways
    • B66C2700/018—Construction details related to the trolley movement

Definitions

  • a gantry crane inludes a framework supporting a main girder and a pair of swingable jibs which are movable I between a first position in' which they form anextension of the main girder and a second, stowed position in which they are parallel to the main girder.
  • a trolley is mounted on rails pm- I vided on the girder and jibs.
  • a stopper arrangement includes spring-loaded bolts which are displaced into'thepath of the v trolley upon swinging of the jibs to the stored position to prevent the trolley from running 05 the rails.
  • the present invention relates to gantry cranes and especially ship gantry cranes of the kind which are provided with jibs, said cranes having rails or guidances for a trolley.
  • Such cranes have the drawback that when the jibs are swung 'out for loading on for example port side of a ship, while the jibs on starboard side are swung in to parked position, one inadvertently can run the trolley overboardon starboard side, if the crane operator is not attentive and stops the trolley in due time. To prevent such an accident theinvention proposes a special safety element.
  • said stopper means consist of spring-loaded bolts which by the swinging-in respective jib are moved into the path of travel of the trolley.
  • stopper means being shown and described in connection with a gantry crane also other kinds of cranes or technical structures workgantry crane is seen in plane, its main girder l being provided with swingable jibs 2 which by convenient hinge connections 6 are secured to the ends of the main girder.
  • the gantry crane main girder is provided with rails 3 on which a trolley 4 runs.
  • stopper means are arranged for said trolley consisting of spring-loaded 7 bolts 5. These bolts are by convenient-journaling in the main girder l axially dis placeable in a direction across the longitudinal direction of the main girder. The length of the bolts and their position is so adapted that when they are left free their outer ends extend somewhat out 'from the main girders, while their inner ends are clear of the rails 3. The trolley 4 thus unobstructed can move on the rails 3.
  • a gantry crane comprising a framework supporting a main girder, a pair swingable jibs pivoted to each end of said main girder for swinging movement between a first position in which the jibs form an extension of said main girder, said main girder and jibs being provided with rails, a trolley mounted for movement along said rails, and a second position where the jibs are stored substantially parallel to said main girder, said main girder and jibs being provided with rails, a trolley mounted for movement along said rails, stopper means fixed to said main girder near each end for preventing said trolley from inadvertently running off said rails at that side where the jibs are in said stored position, said stopper means comprising spring-loaded bolts wherein the jibs upon swinging to said stored position engage said spring-loaded bolts to displace said bolts into the path of movement of said trolley.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
US773799A 1967-11-06 1968-11-06 Safety bolt Expired - Lifetime US3554385A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO170418A NO116789B (de) 1967-11-06 1967-11-06

Publications (1)

Publication Number Publication Date
US3554385A true US3554385A (en) 1971-01-12

Family

ID=19910296

Family Applications (1)

Application Number Title Priority Date Filing Date
US773799A Expired - Lifetime US3554385A (en) 1967-11-06 1968-11-06 Safety bolt

Country Status (5)

Country Link
US (1) US3554385A (de)
DE (1) DE1806817A1 (de)
GB (1) GB1172490A (de)
NO (1) NO116789B (de)
SE (1) SE335686B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571139A (en) * 1981-08-24 1986-02-18 Superior Handling Equipment, Inc. Self-propelled freight handling truck
US20070227996A1 (en) * 2006-03-31 2007-10-04 Conrad Muller Crane with boom and running track for a cable carrier

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3244297A (en) * 1963-12-18 1966-04-05 Alliance Machine Co Container ship cranes
US3249236A (en) * 1964-03-25 1966-05-03 Mac Gregor Comarain Sa Transferable guide pulleys for rolling overhead telescopic bridge or gantry crane
US3258129A (en) * 1962-09-12 1966-06-28 Munck Sverre Arrangement of ship gantry crane

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3258129A (en) * 1962-09-12 1966-06-28 Munck Sverre Arrangement of ship gantry crane
US3244297A (en) * 1963-12-18 1966-04-05 Alliance Machine Co Container ship cranes
US3249236A (en) * 1964-03-25 1966-05-03 Mac Gregor Comarain Sa Transferable guide pulleys for rolling overhead telescopic bridge or gantry crane

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4571139A (en) * 1981-08-24 1986-02-18 Superior Handling Equipment, Inc. Self-propelled freight handling truck
US20070227996A1 (en) * 2006-03-31 2007-10-04 Conrad Muller Crane with boom and running track for a cable carrier
US7516857B2 (en) * 2006-03-31 2009-04-14 Noell Crane Systems Gmbh Crane with boom and running track for a cable carrier
CN101045513B (zh) * 2006-03-31 2010-07-28 诺尔起重系统有限公司 具有悬臂的起重机

Also Published As

Publication number Publication date
DE1806817A1 (de) 1969-08-21
SE335686B (de) 1971-06-01
NO116789B (de) 1969-05-19
GB1172490A (en) 1969-12-03

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