US3668729A - Sliding apparatus of a movable bridge - Google Patents

Sliding apparatus of a movable bridge Download PDF

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Publication number
US3668729A
US3668729A US76068A US3668729DA US3668729A US 3668729 A US3668729 A US 3668729A US 76068 A US76068 A US 76068A US 3668729D A US3668729D A US 3668729DA US 3668729 A US3668729 A US 3668729A
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US
United States
Prior art keywords
bridge
extending
flexible connection
connection means
winch
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
US76068A
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English (en)
Inventor
Kunio Mori
Yoshio Shirage
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.)
JFE Engineering Corp
Original Assignee
Nippon Kokan Ltd
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 Nippon Kokan Ltd filed Critical Nippon Kokan Ltd
Application granted granted Critical
Publication of US3668729A publication Critical patent/US3668729A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D15/00—Movable or portable bridges; Floating bridges
    • E01D15/10—Travelling bridges, i.e. roller bridges; Sliding bridges; Rotary cylinder bridges, i.e. rotating about longitudinal axis to invert and raise the road
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D15/00—Movable or portable bridges; Floating bridges
    • E01D15/24—Bridges or similar structures, based on land or on a fixed structure and designed to give access to ships or other floating structures

Definitions

  • the present invention relates to movable bridges for loading and unloading boats at a quay; for example ferry boats canying automobiles and passengers, In particular, it relates to bridges whichare extendable and retractable relative to a quay. 1
  • Such bridges can suffer from the disadvantage that movement of a boat secured to the outboard end of the extended bridge can damage the driving means for moving the bridge and can break the coupling between the bridge and the boat.
  • the present invention relates to an apparatus which assists in connecting and disconnecting the bridge easily from the boat when said boat is alongside the quay.
  • the present invention also provides apparatus having a simple structure which prevents accidental damage to driving means, for extending and retracting the bridge, resulting from movement of the boat, and uncoupling of the bridge from the boat.
  • a bridgear ranged so as to be extendable away from, and retractable back towards, a quay and comprising a winch arrangement coupled to the bridge by at least one flexible connection for extending the bridge and at least one flexible connection for retracting the bridge, one of said flexible connections being wound and the other unwound by the winch arrangement upon operation thereof, whereby to extend or retract the bridge, and a weight suspended from each flexible connection between-the winch BRIEF DESCRIP'HON or' THE DRAWING An embodiment of the invention will now be described, by way of example, reference being made to the accompanying drawing, which shows a side elevation of a bridge according to the invention. 1
  • SPECIFIC EMBODIMENT In the drawing 1 is a bridge which is movable down an inclined surface at aquayside on rotatable wheels (not shown in the drawing) or the like, so that it can b'e extended away from and retract back towards the quay.
  • the outboard end of said bridge is preferably supported by some form of elevating apparatus so that that end can be adjusted vertically according to the height of the gangway of a boat when said boat comes alongside the quay.
  • Guides 2, 3 in the form of pits are arranged in the base over which the bridge 1 moves forward and backward, and stops in the form of shoulders 2a, 3a are provided near the upper ends of the guides 2, 3. Above the tops of the guides spaced apart pairs of guides wheels 4a, 4band 5a,.5b are supported on bearings 6 and 7.
  • pulley blocks 10, 11 from which are suspended weights 8, 9.
  • Flexible connections consistuted by wire ropes 12a, 12 b pass around the pulleys a, 11a of said pulley blocks 10, 11 and said guide wheels 40, 4b, 5a, 5b
  • a return guide wheel 13 for supporting the wire rope 12a is supported on bearing 14.
  • Wire ropes 12a and 12b are attached at one end to wire attachment points 16 and 15 on the lower side of bridge 1 and at their other ends to a winch l7.
  • Wire rope 12a is for extending the bridge. From the wire attachement point 16 nearer the front or outboard end of the bridge 1 it passes over the return guide wheel 13 and then fonns a loop between pulleys 4a and 4b, the pulley block 10a being at the bottom of the loop. From there the rope 12a pases toone of the winding drums for the winch 17. The other wire rope 12b passes from attachment point 15 at the rear of the bridge 1 and forms a loop between pulleys 5a and 5b, the pulley block Ila being suspended from the bottom of the loop. It is then wound on to another winding drum of the winch l7.
  • weight 8 becomes lifted until it comes into contact with stop 20 and thereafter the bridge 1 moves forward to project from the quay.
  • the elevating means is used to place the outboard end of the bridge 1 on a boat alongside and that end is then secured to the boat. After the bridge 1 is thus supported by the boat, wire rope 12a is unwound so that both ropes are loosened and the weights 8, 9 are both at least partly lowered, thereby giving the arrangement flexibility and permitting free movement of the bridge 1.
  • a weight is suspended on both wire ropes via a pulley device placed between said winch and bridge, so that the bridge can be driven outwardly and inwardly relative to the quay by means of said winch.
  • said bridge can move to follow the movement of the ferry, so that no accidental damage to the bridge or the driving means is caused by the ,movementof the boat and also the bridge is not detached from the .boat.
  • weights are suspended as aforementioned, the wire ropes are never loose, whether said bridge is in motion or not, which .would otherwise be an undesirable factor.
  • the winch means 17 is operatively connected to both of the flexible connection means 12a and 12b to provide therein, respectively, lengths greater than the lengths required to extend from the bridge to the winch means, at least when the bridge is in its extended position, by
  • the weights 8 and 9 form a means operatively connected with both of the flexible connection means 12a and 12b to maintain the latter taut while the extended bridge is freely movable independently of the winch means, so that in this way undesirable looseness in the wire ropes is eliminated.
  • a bridge extendable into an extended position extending away from, and retractable back towards, a quay, winch means, at least one extending flexible connection means for extending the bridge into said extended position thereof and at least one retracting flexible connection means for retracting the bridge, said extending and retracting flexible connection means coupling the winch means to the bridge, one of said flexible connection means being wound, and the other unwound by the winch means upon operation thereof to extend or retract the bridge, and said winch means being operatively connected to said extending and retracting flexible connection means for providing therein lengths, respectively, greater than the lengths required to extend from the bridge to said winch means, at least when said bridge is in said extended position thereof, by an'amount sufiicient to render the bridge in the latter position freely movable independently of said winch means, and means operatively connected to said extending and retracting flexible connection means between the winch means and the bridge for maintaining both of said flexible connection means taut when the bridge is in its extended position so as to eliminate undesirable looseness in said extending
  • a bridge as claimed in claim 1 in which said means for maintaining said extending and retracting flexible connection means taut includes weights suspended from the extending and retracting flexible connection means on pulley blocks.
  • a bridge as claimed in claim 2 in which the bridge has an inboard end portion, said retracting flexible connection means for retracting the bridge extending from said winch means to said inboard end and including a downwardly extending loop,
  • a bridge as claimed in claim 3 comprising a return pulley, said extending flexible connection means for extending the bridge extending from said winch means round said return pulley to the bridge, a second downwardly extending loop situated between the winch means and the return pulley, and spaced apart pulleys supporting said second loop, and one of said weights being suspended from said second loop.
  • a bridge as claimed in claim 4 comprising stops coacting with said weights for limiting movement of the weight connected to said extending flexible connection means during movement of the bridge to its extended position and for limiting movement of the weight connected to said retracting flexible connection means during retraction of the bridge.
  • a bridge as claimed in claim 5 in which the stops coact with said weights for limiting movement thereof during extension and retraction of the bridge.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
US76068A 1969-12-28 1970-09-28 Sliding apparatus of a movable bridge Expired - Lifetime US3668729A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44105076A JPS5020376B1 (hu) 1969-12-28 1969-12-28

Publications (1)

Publication Number Publication Date
US3668729A true US3668729A (en) 1972-06-13

Family

ID=14397832

Family Applications (1)

Application Number Title Priority Date Filing Date
US76068A Expired - Lifetime US3668729A (en) 1969-12-28 1970-09-28 Sliding apparatus of a movable bridge

Country Status (8)

Country Link
US (1) US3668729A (hu)
JP (1) JPS5020376B1 (hu)
DE (1) DE2063621A1 (hu)
FR (1) FR2071809A5 (hu)
GB (1) GB1301332A (hu)
NL (1) NL141947B (hu)
NO (1) NO130023B (hu)
SE (1) SE347037B (hu)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6195826B1 (en) 1999-05-28 2001-03-06 Fmc Corporation Aircraft engagement assembly for aircraft boarding bridges
US6568019B2 (en) * 2001-05-25 2003-05-27 Paul H. Markelz Mechanical bridge assembly and method
US6898816B2 (en) 2000-10-05 2005-05-31 Fmc Technologies, Inc. Adaptable cab floor engagement assembly for commuter and conventional jet aircraft
US8387192B1 (en) * 2008-09-12 2013-03-05 Docksliders, LLC Enhanced adjustable gangway
RU2745940C1 (ru) * 2020-09-22 2021-04-05 Игнат Игоревич Иванов Мобильный мост

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5336283U (hu) * 1976-09-01 1978-03-30

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US474125A (en) * 1892-05-03 Bridge-gate
US577443A (en) * 1897-02-23 Cantaliver drawbridge
US598012A (en) * 1898-01-25 Drawbridge
US1368841A (en) * 1919-03-28 1921-02-15 Heyl & Patterson Rail-clamp for traveling bridges

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US474125A (en) * 1892-05-03 Bridge-gate
US577443A (en) * 1897-02-23 Cantaliver drawbridge
US598012A (en) * 1898-01-25 Drawbridge
US1368841A (en) * 1919-03-28 1921-02-15 Heyl & Patterson Rail-clamp for traveling bridges

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6195826B1 (en) 1999-05-28 2001-03-06 Fmc Corporation Aircraft engagement assembly for aircraft boarding bridges
US6898816B2 (en) 2000-10-05 2005-05-31 Fmc Technologies, Inc. Adaptable cab floor engagement assembly for commuter and conventional jet aircraft
US6568019B2 (en) * 2001-05-25 2003-05-27 Paul H. Markelz Mechanical bridge assembly and method
US8387192B1 (en) * 2008-09-12 2013-03-05 Docksliders, LLC Enhanced adjustable gangway
RU2745940C1 (ru) * 2020-09-22 2021-04-05 Игнат Игоревич Иванов Мобильный мост

Also Published As

Publication number Publication date
FR2071809A5 (hu) 1971-09-17
GB1301332A (hu) 1972-12-29
NL141947B (nl) 1974-04-16
JPS5020376B1 (hu) 1975-07-15
NL7014696A (hu) 1971-06-30
DE2063621A1 (de) 1971-07-15
SE347037B (hu) 1972-07-24
NO130023B (hu) 1974-06-24

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