US3870123A - Apparatus for raising and lowering a heavy weight - Google Patents

Apparatus for raising and lowering a heavy weight Download PDF

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Publication number
US3870123A
US3870123A US467780A US46778074A US3870123A US 3870123 A US3870123 A US 3870123A US 467780 A US467780 A US 467780A US 46778074 A US46778074 A US 46778074A US 3870123 A US3870123 A US 3870123A
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US
United States
Prior art keywords
column
wedges
inverted
working platform
tapered
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
US467780A
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English (en)
Inventor
Hitoshi Izumi
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.)
Mitsui Engineering and Shipbuilding Co Ltd
Original Assignee
Mitsui Engineering and Shipbuilding Co 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 Mitsui Engineering and Shipbuilding Co Ltd filed Critical Mitsui Engineering and Shipbuilding Co Ltd
Application granted granted Critical
Publication of US3870123A publication Critical patent/US3870123A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E02B17/0836—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks
    • E02B17/0854—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks with clamping wedges, eccentric clamping devices and so on

Definitions

  • the present invention relates to an apparatus for raising and lowering a heavy weight such as a working plaform.
  • the object of the present invention is to provide an apparatus which can raise and lower a floatable working'platform along a column piled in the sea bottom and also can raise and lower the column in the floating condition of the working platform.
  • Another object of the present invention is to provide an apparatus in which raising and lowering operation of the column may be performed in the same efficiency as the operation in the working platform.
  • FIG. 1 is a plan view of an apparatus according to the present invention, with the left half portion of the drawing showing a top plan view of the lower outer ring and the right half portion showing a .top plan view of the upper outer ring;
  • FIG. 2 is a sectional view taken along the line A-A of FIG. 1;
  • FIG. 3 is a sectional view taken along the line 8-8 of FIG. 1;
  • FIGS.'4a and 4b are diagrammatic drawings illustrating the column raising operation according to the present invention.
  • FIGS..5a to Sfare diagrammatic drawings illustrating the column lowering operation according to the present invention.
  • the lower wedges 8 are held in the frame 28, which is Each inverted wedge 18 is engaged with the inner inverted tapered periphery of the block 16 and held by a frame 20.
  • Each inverted wedge 22 is engaged with the inner inverted tapered periphery of the block 17 and held by a frame 24.
  • the frame 20 is connected to the oil hydraulic cylinder 21 and a pair of legs of the frame are slidably engaged with guide members 26 provided on both sides of theblock 16.
  • the frame 24 is also connected to the oil hydraulic cylinder 25 and a pair of legs are slidably engaged with guide members 27 provided on both sides of the block 17.
  • each main cylinder 12 is contracted from the position of FIG. 4a whereby the upper outer ring 1 is urged to descend,'as the descent of the column II, the lower inverted wedges 22 are brought into a perfect wedging engagement with blocks 17 to grip the column II, and hence descent of the column II is stopped. Thus only the upper outer ring 1 is lowered (FIG. 4b). The above operation-is repeated cyclically to raise up the column II.
  • Each post 7 has a guide surface to maintain the clearance between the column and-upper and lower rings within a certain permissible range.
  • main oil hydraulic cylinders 12 are provided between the rings 1 and 2 main oil hydraulic cylinders 12 are provided.
  • the working platform I is connected to the upper ring 1 by tie rods 13 each of which is passed through a hole of each ring and connected to the working platform by a pin 15 and a nut 14 is engaged with the top of the tie rod 13.
  • Each rod 13 has a larger diameter portion at the lower part thereof with which the lower ring 2 is engaged and thereby held.
  • Arrangement by rings 1 and 2 and wedges '3 and 8 is to raise and lower the working platform I along the column secured on the sea bottom.
  • Arrangement for raising and lowering the column II comprises inverted taper blocks 16 secured on the upper ring 1, inverted taper blocks 17 secured on the lower ring 2, inverted wedges l8 and 22, friction materials 19 and 23 and oil hydraulic cylinders 21 and 25.
  • each lower inverted wedge operating cylinder 25 is contracted to bring the upper inverted wedges 18 into the wedging engagement with the column.
  • pressure oil is introduced in the chamber of each lower inverted wedge operating cylinder 25 to urge the lower inverted wedges 22 upwardly.
  • the lower inverted wedges are not withdrawn from the wedging engagement with the column, because the column weight is loaded to the lower inverted wedges 22 (FIG. 50).
  • each cylinder 12 is extended to the stroke end, whereby the upper inverted wedge 18 is brought into the wedging engagement, so that the column II is rised slightly with the upper outer ring 1.
  • the lower inverted wedges 22 is released and moved away from engagement with the column by the lower inverted wedge operating cylinder 25 (FIG. 5d).
  • the main cylinder 12 is then contracted from the position of FIG. 5d, whereby the column II is now gripped by the upper inverted wedges 18 and lowered with the upper outer ring 1.
  • pressure oil is fed into the lower inverted wedge operating cylinder 25 to force the lower inverted wedges 22 into engagement with the column.
  • pressure oil is also introduced into the upper inverted wedge operating cylinder 21 to force the upper inverted wedges 18 upwardly (FIG. 5
  • the main cylinder 12 is further contracted to the stroke end, whereby the lower inverted wedges 22 are brought into wedging engagement to grip'the column ll, thus the column is stopped.
  • column lifting is accomplished by moving up or down the upper outer ring 1 by the opertion of main cylinder 12 supported by the lower outer ring 2 which is engaged with the step of the lower part of each tie rod 13. Ascent of the column is effected by extending the main cylinder 12. Since area of the outside surface of the piston is larger than area of the rod side surface of the piston, extending force of the piston rod is greater than contracting force of the piston rod. Therefore the operation of the main cylinder 12 in ascent of the column is very advantageous as strong thrust is obtained for extracting a column piled into the sea bed.
  • the tie rod 13 receives compression force when the column is raised or lowered, but the distance between the portion of the tie rod which receives such compression force and the tie rod connecting pin 15 is relatively short. This short distance proves extremely advantageous with regard to buckling of the tie rod. Further, since the tie rod is slidably engaged with both upper and lower outer rings, kink of the apparatus, that could possibly take place, is minimized.
  • both upper and lower inverted wedge operating cylinders 21 and 25 are extended, so that the upper and lower inverted wedges l8 and 22 are moved away from the engagement with the column, while the upper and lower wedges 3 and 8 are operated to be brought into wedging engagement with the column.
  • the main cylinder 12 is extended or contracted.
  • weight of the working platform acts always downwardly against the tie rod 13, so that the upper face of the upper outerring l and the nut 14 are kept closely attached to each other.
  • Apparatus for raising and lowering a heavy weight comprising a column, a floatable working platform adapted to be moved along said column, an upper outer ring surrounding said column, a lower outer ring surrounding said column and having a spaced distance from said upper outer ring, each of said outer rings having a tapered inner surface, a' plurality of upper and lower wedges each of which has a tapered outer surface which may be engaged with the corresponding tapered surface of either of said outer rings, frames for holding said upper and lower wedges, several cylinders for operating said wedges, upper and lower inverted tapered blocks disposed on said upper and lower outer rings respectively, upper and lower inverted tapered wedges which may be engaged with the corresponding tapered surfaces of said inverted tapered blocks, frames for holding said upper and lower inverted wedges, cylinders for operating said upper and lower inverted wedges, guide means for moving said upper and lower inverted wedge holding frames in the direction parallel to the inverted tapered surface, main cylinders coupling said upper and lower outer rings and adapted to move

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Types And Forms Of Lifts (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Control And Safety Of Cranes (AREA)
  • Revetment (AREA)
US467780A 1973-05-10 1974-05-07 Apparatus for raising and lowering a heavy weight Expired - Lifetime US3870123A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5191073A JPS5535529B2 (ja) 1973-05-10 1973-05-10

Publications (1)

Publication Number Publication Date
US3870123A true US3870123A (en) 1975-03-11

Family

ID=12900019

Family Applications (1)

Application Number Title Priority Date Filing Date
US467780A Expired - Lifetime US3870123A (en) 1973-05-10 1974-05-07 Apparatus for raising and lowering a heavy weight

Country Status (10)

Country Link
US (1) US3870123A (ja)
JP (1) JPS5535529B2 (ja)
AU (1) AU470930B2 (ja)
DE (1) DE2422515A1 (ja)
FR (1) FR2228898B1 (ja)
GB (1) GB1472299A (ja)
IT (1) IT1012208B (ja)
NL (1) NL7406242A (ja)
NO (1) NO139097C (ja)
SE (1) SE390951B (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677936A (en) * 1984-09-12 1987-07-07 Zf-Herion-Systemtechnik Gmbh Progressively movable holding device
US4793439A (en) * 1987-07-28 1988-12-27 Crawford Homer S Apparatus for climbing trees, poles and the like and being remotely controlled from ground elevation
US20060130933A1 (en) * 2004-12-22 2006-06-22 Smith George E Tree trimming apparatus

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5496635A (en) * 1978-01-17 1979-07-31 Hitachi Ltd Accelerator pump device for carburetter
US4411408A (en) * 1980-10-27 1983-10-25 The Offshore Company Jack-up platform apparatus
US4422802A (en) * 1981-04-07 1983-12-27 Robin Shipyard (Pte.) Ltd. Leg load distribution and locking arrangement for jack-up type mobile offshore platform
GB2116678B (en) * 1982-02-08 1986-04-30 Hitachi Metals Ltd Ball valves
GB2150913A (en) * 1983-08-09 1985-07-10 Hugh Kane Self propelled carriage
GB2160278A (en) * 1984-06-12 1985-12-18 Vickers Plc Adjusting axial length of a marine platform tether line
GB8905202D0 (en) * 1989-03-08 1989-04-19 Qualter Hall & Co Ltd Power operated device
AU649281B2 (en) * 1990-11-08 1994-05-19 Andrew Reid Nominees Pty. Ltd. Builders lifting jack
CN100341598C (zh) * 2004-12-22 2007-10-10 上海氯碱化工股份有限公司 一种低温蒸发、冷却生产超净高纯试剂的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1964995A (en) * 1931-01-02 1934-07-03 Fischer & Hayes Rope And Steel Scaffold jack
US2906365A (en) * 1957-01-11 1959-09-29 Arthur R Howard Automatic scaffolding machine
US2947148A (en) * 1954-06-28 1960-08-02 Sun Oil Co Jacking mechanism for seadrome
US3028143A (en) * 1959-03-30 1962-04-03 David B Cheskin Lifting apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1964995A (en) * 1931-01-02 1934-07-03 Fischer & Hayes Rope And Steel Scaffold jack
US2947148A (en) * 1954-06-28 1960-08-02 Sun Oil Co Jacking mechanism for seadrome
US2906365A (en) * 1957-01-11 1959-09-29 Arthur R Howard Automatic scaffolding machine
US3028143A (en) * 1959-03-30 1962-04-03 David B Cheskin Lifting apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677936A (en) * 1984-09-12 1987-07-07 Zf-Herion-Systemtechnik Gmbh Progressively movable holding device
US4793439A (en) * 1987-07-28 1988-12-27 Crawford Homer S Apparatus for climbing trees, poles and the like and being remotely controlled from ground elevation
US20060130933A1 (en) * 2004-12-22 2006-06-22 Smith George E Tree trimming apparatus
US7422041B2 (en) 2004-12-22 2008-09-09 Smith George E Tree trimming apparatus

Also Published As

Publication number Publication date
FR2228898B1 (ja) 1977-03-11
SE390951B (sv) 1977-01-31
GB1472299A (en) 1977-05-04
AU6870574A (en) 1975-11-13
AU470930B2 (en) 1976-04-01
JPS504801A (ja) 1975-01-18
IT1012208B (it) 1977-03-10
NL7406242A (ja) 1974-11-12
NO139097B (no) 1978-09-25
NO139097C (no) 1979-01-10
FR2228898A1 (ja) 1974-12-06
DE2422515A1 (de) 1974-11-21
JPS5535529B2 (ja) 1980-09-13
NO741648L (no) 1974-11-12

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