US3536204A - Anchoring device for gantry cranes - Google Patents

Anchoring device for gantry cranes Download PDF

Info

Publication number
US3536204A
US3536204A US781793A US3536204DA US3536204A US 3536204 A US3536204 A US 3536204A US 781793 A US781793 A US 781793A US 3536204D A US3536204D A US 3536204DA US 3536204 A US3536204 A US 3536204A
Authority
US
United States
Prior art keywords
gantry
crane
ship
leg
anchoring
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
US781793A
Other languages
English (en)
Inventor
Raimunds Auzins
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.)
MORGAN ENGINEERING SYSTEMS Inc A DE CORP
MORGAN ENG
Original Assignee
MORGAN ENG
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 MORGAN ENG filed Critical MORGAN ENG
Application granted granted Critical
Publication of US3536204A publication Critical patent/US3536204A/en
Assigned to MORGAN ENGINEERING SYSTEMS, INC., A DE CORP. reassignment MORGAN ENGINEERING SYSTEMS, INC., A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: AMCA INTERNATIONAL CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/36—Arrangement of ship-based loading or unloading equipment for floating cargo
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/10—Arrangement of ship-based loading or unloading equipment for cargo or passengers of cranes
    • B63B27/12—Arrangement of ship-based loading or unloading equipment for cargo or passengers of cranes of gantry type

Definitions

  • Anchoring devices for securing a travelling shipboard gantry crane to a ships deck and for relieving the gantry legs of the bending moments caused by rolling of the ship.
  • One such anchoring device is located on the ships deck adjacent [54] g gfi g fi g FOR GANTRY CRANES each of the gantry legs and each device includes a rigid anchor tower with means at the top thereof adapted to engage the [52] [1.8. 212/3, crane structure intermediate the ends of the respective gantry 2 12/1 leg .to transmit horizontal loads from the central portion of the [5 1] Int. Cl.
  • This invention relates to traveling gantry cranes and especially those cranes adapted for use on ships designed to carry lighters or containerized cargo for example. More particularly, my invention relates to a system for anchoring the gantry crane such as to a ships deck at a stowage position when the ship is underway.
  • Such traveling shipboard gantry cranes normally span the cargo holds of the ship and travel on gantry legs along opposite sides of the ships deck between a number of operating positions. For stowage, the crane is moved to a predetermined position along the deck where it must be anchored to the ship securely enough to prevent it from being torn loose or structurally damaged when the ship is operating in heavy seas. Since the crane necessarily has a rather high center of mass relative to the ship, exceptional problems are encountered in designing a satisfactory anchoring mechanism.
  • a particular problem is that of the bending moments which act on the gantry legs during rolling motion of the ship. Accordingly, it is desirable to secure the crane in such a way that the bending moments acting on the gantry legs during rolling motion of the ship are relieved as much as possible by anchoring structure.
  • the anchoring mechanism of the present invention satisfies the above requirements and also affords other features and advantages not obtainable from the prior art.
  • Another object is to reduce the bending moments acting on the gantry legs of a traveling shipboard gantry crane due to the mass of the crane when it is secured to the deck of the ship and the ship is rolling in heavy seas.
  • Still another object is to positively restrain longitudinal travel of the crane on the ships deck when the crane is'in an anchored position and the ship is pitching in heavy seas.
  • an anchoring mechanism adapted to engage an outboard anchoring structure on the crane adjacent each gantry leg.
  • Each mechanism includes an anchor tower on the ships deck which is so located as to be adjacent its respective gantry leg when the crane is in its anchoring position.
  • a jack adapted for vertical movement within the anchor tower is provided with a head restrained against lateral movement at the top of the tower and arranged to engage the cranes respective anchoring structure located above when the crane is in its anchoring position. The head takes a lateral shear load when the ship rolls from side to side and thus reduces the moment arm between the top of the gantry leg and the point of application of restraining force.
  • a pair of horizontal jacks are pivotally connected to the bottom of the anchor tower at horizontallyspaced connection points, each jack being pivotable at one end about a vertical pivot axis through the base. Also, each horizontal jack has a vertical axis, pivotal connector at its opposite end adapted for connection to the respective adjacent gantry leg.
  • the horizontal jacks When the horizontal jacks are connected to the adjacent gantry leg, they are angularly disposed relative to one another in a horizontal plane and have their included angle intersected by a transverse vertical plane extending laterally of the ship so as to provide a horizontal triangulation efi'ective to positively restrain longitudinal movement of the crane when the ship is pitching in heavy seas as well as a means for applying a lateral restraining force to the bottom of the respective gantry leg.
  • FIG. 1 is a side elevation of a traveling gantry crane located on the deck of a ship having anchoring devices embodying the invention, the crane being shown in its stowage position in solid lines and in a'displaced operating position in phantom lines;
  • FIG. 2 is a fragmentary sectional view on an enlarged scale of one of the anchoring devices, taken on the line 2-2 of FIG.
  • FIG. 3 is a horizontal section taken on the line 3-3 of FIG.
  • FIG. 4 is a horizontal section taken on the line 4-4 of FIG. 2;
  • FIG. 5 is a horizontalsection taken on the line 5-5 of FIG. 2.
  • FIG. 1 a shipboard gantry crane A having four gantry legs B and adapted for travel longitudinally of a ship C with its legs B located on opposite sides of the ships deck.
  • the gantry crane A has been moved to a position on the ship C where each of the gantry legs B are located adjacent one of four anchoring devices D mounted on the ships deck on the outboard sides of the gantry legs B.
  • the anchoring devices B serve to anchor the gantry crane A securely to the ships deck during the time that the ship is under way and especially to relieve the bending moments acting on the gantry legs B when the ship C rolls from side to side.
  • the crane A travels along a pair of spaced rails 10 extending longitudinally of the ship, one rail being on each side of the ships cargo holds.
  • the gantry legs B are supported on wheels 11 carried by trucks 12 which are journaled at the bottom of each leg.
  • An overhanging structure 13 extends beyond the legs B on the outboard side of the crane such as is more completely illustrated in copending U.S. Pat. application Ser. No. 721,821 identified above.
  • the overhanging structure 13 has an anchor receptacle 14 provided adjacent each gantry leg B.
  • Each device D includes an anchor tower 15 supported on the ship C at the desired stowage location along the deck.
  • the height of the tower above the deck is just slightly less than the vertical spacing of the overhanging structure 13 above the deck as best illustrated in FIG. 2. Accordingly, the gantry crane A can freely pass over the anchor towers 15 during its operating travel.
  • each anchor tower 15 Located within each anchor tower 15 is a vertical jack unit 16 having a relatively high load rating such as around 125 tons.
  • the jack unit 16 has a threaded shank l7 and a rotatable sleeve 18 threaded on the shank 17 to provide the lifting movement.
  • the sleeve 18 has an axial travel on the threaded shank 17 of about 18 inches and is turned by a fluid motor (not shown) of conventional design.
  • a tubular post 19 is supported at the top of the sleeve 18 in such a way that the sleeve rotation does not turn the post, so that the movement of the post is confined to linear movement within limits of vertical travel.
  • a head 20 Located on top of the post 19 is a head 20 with a tapered upper end adapted to engage and mate with the anchor receptacle 14.
  • the head 20 extends through an upper bearing sleeve 21 at the top of the anchor tower 15 which serves to transmit to the tower and thence to the ship's deck, horizontal loads acting on the head 20 caused by pitching and rolling of the ship C.
  • Forming a part of the upper bearing sleeve 21 are a pair of wedge units 22 and 23 spaced approximately from one another and adapted to tightly lock the head 20 in polition in the bearing sleeve once the vertical jack unit 16 has been used to move the head 20 securely into the anchor receptacle 14.
  • the wedge units include wedge blocks 24 and 25 and adjusting bolts 26 and-27.”
  • the yoke clamp assembly 28 Spaced below the bearing sleeve 21 is a yoke clamp assembly 28 which guides the vertical movement of the tubular post 19 and restrains lateral movement thereof.
  • the yoke clamp assembly28 includes a fixed portion29 with arms'extending to opposite sides of the anchor tower and a clamping portion 30, each of the portions 29 and 30 having a bearing member in the form of a half ring extending around the tubular post 19.
  • the fixed portion 29 also has an arm 31 welded thereto which extends perpendicularly to the adjacent wall of the anchor tower l5.
  • Thebottom end of thethreaded shank 17 rests on a resilient preloading pad 32 formed of reinforced rubber wafers in a stack.
  • the preloading pad is retained in a cylindrical receptacle 33.
  • a pair of horizontal plates 35 and 36 are located near the base of the anchorgtower 15, the. plates being spaced one above the other to form a fork for mountinga pair of horizontal screw jacks 39 and 40 which can swing in a horizontal plane about spaced vertical axes.
  • the horizontal screw jacks j 39 and 40 are connected by pins to the plates 35 and 36 and e have clevis type eye ends 41 and 42 at their oppositeends which are connectable to a horizontal plate 43 welded to the gantry leg B.
  • the eye ends 41 and 42 are connected to the plate 43 by pins which extend through the eye ends and also through spaced holes in the plate.
  • the crane A is initially moved to its anchoring position with 7 each gantry leg B adjacent an anchoring device D.
  • One of the horizontal screw jacks on a leg at each side of the crane is swiveled so that its clevis end engages the anchoring plate 43 on the respective gantry leg B.
  • the latching pins are-inserted through the clevis ends and the respective hole in the plate 43 and locked with a cotter pin.
  • the respective jacks are then operated to move the crane A to its exact securing position.
  • the load frame (not shown) of the gantry crane A is. secured such by lowering it onto a hatch cover and latching it in place. Also the hoist ropes are tightened and all other hoist equipment secured.
  • each head 20 engages its socket 14 the respective jack unit 16 is operated until the preloading pad 32'is depressed-a desired amount.
  • a preloading gauge bar 45 located at the base of the'threaded shank 17, gives a visual indication of the load transmitted through the jack due to the compression of the preloading pad 32.
  • the screw jack may be operated until the bottom of the jack l6 rests on the casing 33 after which the jack may be relaxed until the gauge bar 45 moves up to a predetermined position.
  • the vertical
  • screw jacks 16 do not take up the vertical loads of the gantry legs B but merely exert enough force to keep the heads 20 seated firmly in their respective sockets 14.
  • each gantry leg B is secured at two different vertical positions to its respective anchor tower "D and any lateral loads acting on the gantry leg are transmitted to the anchor tower at these two levels. Accordingly when the ship rolls over to one side while at sea and the mass of the gantry crane places a lateral load on the gantry legs, the bendingrnomentacting on the leg is relieved bythe anchor towers D.
  • a lateral resisting force to the right acts on the gantry leg D intermediate its ends at the level of .the jack head 20. Accordingly,.a lateral resisting force to the left acts on-the bottom of the gantry leg through the respective horizontal screw jacks 39 and 40.
  • the resulting cantileverl' type action on the gantryleg B at the anchor tower D distributes the bending moment acting on the gantry leg over a greater portion of its length and thus reduces the stress at the joint between the top' of the leg and the transverse girder.
  • the vertical jacks 16 may be used to jack up the crane for maintenance of the truck, wheels etc.
  • An anchoring device for securing a traveling shipboard gantry crane to a ships deck when the crane is in ananchoring position, the crane having gantry legs which travel along opposite sides of the ships deck and having anchoring structure adjacent each leg intermediate the ends thereof and extending outboard from said leg, comprising an anchor tower secured to said deck adjacent each leg when the crane is inthe anchoring position, vertically movable means secured against lateral movement at the top of said tower and adapted to engage its respective anchoring structure when the crane is in its anchoring position, and being operable to exert a lateral restraining force on said gantry leg when the ship rolls and pitches and a pair of horizontal jacks pivotally connected to said anchor tower at horizontally spaced connection points, each of said horizontal jacks being pivotable at one end about a vertical pivot axis through said base, a vertical axis pivotal connector at the opposite ends of each of said horizontal jacks, said connector being connectable to the bottom end'of the respective adjacent gantry leg to exert a lateral res
  • Apparatus as defined in claim 2 including resilient means operatively associated with said vertical jack for preloading with its respective anchoring structure.
  • clamping means includes adjustable wedge clamps located at the top of said to'wer.
  • clamping means includes adjustable clamps located at vertically spaced locations along said vertically movable means.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Ship Loading And Unloading (AREA)
  • Jib Cranes (AREA)
US781793A 1968-12-06 1968-12-06 Anchoring device for gantry cranes Expired - Lifetime US3536204A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78179368A 1968-12-06 1968-12-06

Publications (1)

Publication Number Publication Date
US3536204A true US3536204A (en) 1970-10-27

Family

ID=25123957

Family Applications (1)

Application Number Title Priority Date Filing Date
US781793A Expired - Lifetime US3536204A (en) 1968-12-06 1968-12-06 Anchoring device for gantry cranes

Country Status (6)

Country Link
US (1) US3536204A (nl)
DE (1) DE1961132C3 (nl)
FR (1) FR2025517A1 (nl)
GB (1) GB1270727A (nl)
NL (1) NL166890C (nl)
SE (1) SE363784B (nl)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2703643A1 (de) * 1976-03-17 1977-09-29 Algoship Int Portalkran
US4492310A (en) * 1982-04-06 1985-01-08 Amca International Corporation Apparatus and method for loading and unloading cargo lighters on or from ships
US20070189434A1 (en) * 2004-08-31 2007-08-16 Jensen Grant C Method and apparatus for clamping a riser brace assembly in nuclear reactor
CN102328731A (zh) * 2011-05-31 2012-01-25 江苏熔盛造船有限公司 一种管子装卸起重机的超长导轨安装方法
EP2626473A1 (en) * 2012-02-09 2013-08-14 Ondernemingen Jan De Nul, naamloze vennootchap Method for reducing the transfer of vibrations to a cutter suction dredger generated by a cutter head and cutter suction dredger on which such method is applied
US20130284081A1 (en) * 2011-07-26 2013-10-31 Spliethoff's Bevrachtingskantoor B.V. Hold crane as well as pipefeeder vessel with such hold crane
CN104261265A (zh) * 2014-09-19 2015-01-07 青岛海西重机有限责任公司 一种新型门座起重机全自动回转锚定装置
CN113148877A (zh) * 2021-04-22 2021-07-23 广西建工集团建筑机械制造有限责任公司 一种塔机回转机构安装方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US600757A (en) * 1898-03-15 walsh
DK106075C (da) * 1962-09-05 1966-12-12 Sverre Munck Skinnegående dækskran til skibe.

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2703643A1 (de) * 1976-03-17 1977-09-29 Algoship Int Portalkran
US4492310A (en) * 1982-04-06 1985-01-08 Amca International Corporation Apparatus and method for loading and unloading cargo lighters on or from ships
US20070189434A1 (en) * 2004-08-31 2007-08-16 Jensen Grant C Method and apparatus for clamping a riser brace assembly in nuclear reactor
US7272204B2 (en) * 2004-08-31 2007-09-18 General Electric Company Method and apparatus for clamping a riser brace assembly in nuclear reactor
CN102328731A (zh) * 2011-05-31 2012-01-25 江苏熔盛造船有限公司 一种管子装卸起重机的超长导轨安装方法
US20130284081A1 (en) * 2011-07-26 2013-10-31 Spliethoff's Bevrachtingskantoor B.V. Hold crane as well as pipefeeder vessel with such hold crane
US9315244B2 (en) * 2011-07-26 2016-04-19 P. Kalkman Waddinxveen Beheer B.V. Hold crane as well as pipefeeder vessel with such hold crane
EP2626473A1 (en) * 2012-02-09 2013-08-14 Ondernemingen Jan De Nul, naamloze vennootchap Method for reducing the transfer of vibrations to a cutter suction dredger generated by a cutter head and cutter suction dredger on which such method is applied
CN104261265A (zh) * 2014-09-19 2015-01-07 青岛海西重机有限责任公司 一种新型门座起重机全自动回转锚定装置
CN104261265B (zh) * 2014-09-19 2016-08-24 青岛海西重机有限责任公司 一种新型门座起重机全自动回转锚定装置
CN113148877A (zh) * 2021-04-22 2021-07-23 广西建工集团建筑机械制造有限责任公司 一种塔机回转机构安装方法

Also Published As

Publication number Publication date
NL6918213A (nl) 1970-06-09
FR2025517A1 (nl) 1970-09-11
NL166890C (nl) 1981-10-15
SE363784B (nl) 1974-02-04
GB1270727A (en) 1972-04-12
DE1961132A1 (de) 1970-08-20
DE1961132C3 (de) 1982-02-25
NL166890B (nl) 1981-05-15
DE1961132B2 (de) 1981-06-19

Similar Documents

Publication Publication Date Title
US3598440A (en) Rotatable container-hoisting apparatus
FI60372B (fi) Svaengbar tillfartsramp foer fordon
US4106641A (en) Universal gantry crane
US4195740A (en) Lift crane support system
US3536204A (en) Anchoring device for gantry cranes
US3785511A (en) Anti-pounding device mounted on a boat for maintaining a cable at a given level above an underwater bed
US4175908A (en) Method of loading and unloading heavy objects from a vessel
US4657150A (en) Overhead crane having bridge mounted for differential movement
DE1264010B (de) Krananlage fuer grosse Tragkraefte und Lastmomente
US4127199A (en) Lifting apparatus
US3640413A (en) Boat crane
US4492310A (en) Apparatus and method for loading and unloading cargo lighters on or from ships
US3436113A (en) Rotatable and convertible lifting spreader
KR101173130B1 (ko) 크레인 사고 방지방법
US2916002A (en) Marine hoisting apparatus
US3143224A (en) Apparatus for the loading and unloading of ships
US3318463A (en) Heavy hoisting crane
EP0406394A1 (en) Container crane
US1944054A (en) Cableway tower
US3106900A (en) Special purpose railway car
CA2109301C (en) Apparatus for offshore swivel replacement
US3341035A (en) Cargo centering device
CN211308918U (zh) 一种可快速旋转安装连接过桥的装置
US3190456A (en) Shipboard cargo transferring apparatus
KR101173143B1 (ko) 크레인 주행부 구조

Legal Events

Date Code Title Description
AS Assignment

Owner name: MORGAN ENGINEERING SYSTEMS, INC., A DE CORP.,OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AMCA INTERNATIONAL CORPORATION;REEL/FRAME:004777/0773

Effective date: 19870828

Owner name: MORGAN ENGINEERING SYSTEMS, INC., 947 EAST BROADWA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMCA INTERNATIONAL CORPORATION;REEL/FRAME:004777/0773

Effective date: 19870828