US3183997A - Suspended working platform unit - Google Patents

Suspended working platform unit Download PDF

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Publication number
US3183997A
US3183997A US257045A US25704563A US3183997A US 3183997 A US3183997 A US 3183997A US 257045 A US257045 A US 257045A US 25704563 A US25704563 A US 25704563A US 3183997 A US3183997 A US 3183997A
Authority
US
United States
Prior art keywords
shaft
platform
carrying member
tank
plate
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
US257045A
Other languages
English (en)
Inventor
Hendricus P Kleiss
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.)
Shell USA Inc
Original Assignee
Shell Oil Co
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 Shell Oil Co filed Critical Shell Oil Co
Application granted granted Critical
Publication of US3183997A publication Critical patent/US3183997A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/24—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons
    • E04G3/246—Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons following the inside contour of a building
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/36—Scaffolds for particular parts of buildings or buildings of particular shape, e.g. for stairs, cupolas, domes
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/36—Scaffolds for particular parts of buildings or buildings of particular shape, e.g. for stairs, cupolas, domes
    • E04G1/362—Scaffolds for particular parts of buildings or buildings of particular shape, e.g. for stairs, cupolas, domes specially adapted for tanks, silos or similar vessels

Definitions

  • the invention relates to a suspended working platform unit for carrying out operations in tanks, holds, bunkers and similar spaces.
  • certain operations such as the inspection and painting of the inner walls of tanks
  • the assembly and subsequent dismantling of this scaffolding which may be designed in the form of suspended working platform units, is a time-consuming task.
  • This drawback occurs in particular when the scaffolding has'to be made up of numerous parts as in spaces which are only provided with narrow access openings. An example of such difficulty accessible spaces is afforded by the tanks of tankers.
  • the suspended working platform unit according to th invention is characterized in that it consists of a shaft to be hung vertically, the top part of which shaft can be secured in a carrying member which can be positioned above an opening in the tank roof, and the bottom part of which shaft is provided with a platform which in the horizontal position can be fixed to the shaft.
  • a unit of this type can be lowered through a relatively narrow opening into the tank, but when it is secured in the operating position it covers a large operating area.
  • the suspended working platform unit is preferably designed with a platform which can be moved hingeably in a vertical plane so that the suspended working platform unit can be readily inserted as a whole in an oblong shape.
  • the area of the tank which can be covered by the platform is substantially increased, but should it still be impossible to reach the Whole surface which is to be treated in the tank the suspended working platform unit can be shifted in a simple and rapid manner to an adjoining surface.
  • FIG. 1 is a lateral view of the suspended working platform unit suspended in operating position.
  • FIG. 2 is a top plan View of the carrying member as shown in FIG. 1.
  • FIG. 3 is a diagram of a lateral view of the suspended Working platform unit being introduced into a tank of a tanker.
  • a shaft 1 is secured in a carrying member 2 mounted above an opening in a cover plate 3 of the tank.
  • a platform 4 consisting of a tubular Referring to the 2 frame and plates and so secured at one end to the shaft 1 by means of a hinge 5 as to be rotatable in a vertical plane.
  • the platform 4 can be fixed in a horizontal position by means of a connecting element 6 one end of which is joined to the platform 4 by means of a hinge 7, the other end being provided with an eye. 8 fitting detachably around a hook 9 of the shaft 1.
  • the shaft 1 is suspended in the carrying member 2 3,183,997. Patented May 18, 1965 from a detachable tumbler bolt 10 which is inserted transversely through the end of the shaft 1 projecting beyond the carrying member 2 and secured therein by means of a rotatable retaining member 23. A liner 25 is provided in the shaft 1 around the bolt 10. In order to lower and hoist the shaft 1 with the platform 4, a hook 30 secured to a rope 31 may be fastened around the liner 24 (as will be seen from FIG. 3). After the bolt 10 has been removed from the shaft 1 the latter can be lowered by means of the carrying member 2.
  • the bolt 10 rests in oppenings of supporting plates 11, the latter being secured to a plate 12 which rotatably mounted on the carrying member 2 via a slip ring 22, so that the entire assembly of the platform 4, the shaft 1, the bolt 10, the supporting plates 11 and the plate 12 is rotatable relative to the fixed carrying member 2.
  • a slip ring 22 use may also be made of a ball bearing or the like.
  • the assembly may be rotated by exerting a tangential force on the end of the bolt 10, for instance by a workman on the roof of the tank. If necessary, the workman can revolve himself on the platform 4 by leaning against reinforcement beams, etc. of the tank.
  • the rotatable plate 12 is provided with an eye 13 having an opening 14 which is, in various positions of the plate 12, above one of the openings 15 of the top flange plate 16 of the carrying member 2.
  • an eye 13 having an opening 14 which is, in various positions of the plate 12, above one of the openings 15 of the top flange plate 16 of the carrying member 2.
  • the dimensions of the platform 4 should be so adapted to the size of the openings present in the tank deck that the suspended working platform unit can be moved into and out of the tank space. In general, this is the case when the platform 4 is so designed that in the best position it can still be slid through the largest access opening of the tank.
  • the openings in the tank deck in which the suspended working platform unit is suspended may, however, be much smaller than the largest access opening; the suspension openings need only be large enough to make it possible for the carrying member 2, which is narrow compared to the platform 4, to be placed on the cover plate 3.
  • Such openings are usually present in tanks of tankers.
  • the platform 4 may be provided with a detachable guard rail 21.
  • the carrying member 2 In order to use the suspended working platform unit the carrying member 2 is secured as a separate part above the suspension opening of the tank by means of the bolts already provided for closing the opening.
  • the connecting element 6 detached from the shaft 1 is rotated into a position alongside the platform 4; the latter is capable of rotating freely about the hinge 5, so that the suspended working platform unit, when suspended from the shaft 1, occupies a more or less extended position. In this position the platform is now placed above an access opening 17 of a tank 20 and then passed into the tank 20 through this opening 17 (see FIG. 3).
  • the suspended working platform unit is lowered onto the bottom of the tank 24) or to a reinforcement frame which is higher than the bottom, where a workman situated at thispoint fixes the platform4 to the shaft 1 in a horizontal position by engaging the connecting element 6 around the hinge 7 and booking it onto the shaft 1.
  • the suspended working platform unit is now lifted and suspended by means of the bolt 10 from the shaft 1 in the carrying member 2.
  • Workmen can reach the platform 4 by means of a rope ladder from the bottom of the tank or from reinforcement beams therein; from the platform they can carry out work on the inside walls of the tank 29.
  • the shaft 1 is made rotatable in the carrying member 2, a large part of the inner surface of the tank 20 can be covered by the platform 4 without the necessity of suspending the unit elsewhere. If, however, the area to be Worked withinthe same tank 20 is greater than that covered by the rotatable platform the unit can be placed in a simple manner in a suspension opening situated further away; this can be done by pulling the bolt out of shaft 1, loweringthe shaft 1 with the platform 4, removing the carrying member 2 and securing it above the new suspension opening, again raising the shaft 1 in the carrying member 2 and inserting the bolt 10 through the top of the shaft 1. The unit is removed from the tank in the same way as it is introduced therein, but the necessary steps are then taken in the reverse order.
  • the starting point was a suspended working platform unit of which the shaft 1 is secured in the carrying member 2 so as to rotate and permit removal, this is not essential.
  • the shaft is arranged rigidly in the carrying member the latter cannot be separately secured to the tank roof from outside but should be inserted together with the shaft through the suspension opening from inside the tank.
  • this opening In order to introduce the carrying member it is then necessary for this opening to be somewhat larger than when the carrying member is designed as a separate member. After the carrying member had been inserted in the opening auxiliary plates are secured above the opening on the tank deck on either side of the carrying member, on which auxiliary plates the carrying member can be fastened.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
US257045A 1962-02-28 1963-02-07 Suspended working platform unit Expired - Lifetime US3183997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL275359 1962-02-28

Publications (1)

Publication Number Publication Date
US3183997A true US3183997A (en) 1965-05-18

Family

ID=19753649

Family Applications (1)

Application Number Title Priority Date Filing Date
US257045A Expired - Lifetime US3183997A (en) 1962-02-28 1963-02-07 Suspended working platform unit

Country Status (3)

Country Link
US (1) US3183997A (ja�@�@)
GB (1) GB961811A (ja�@�@)
NL (1) NL275359A (ja�@�@)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3420332A (en) * 1967-07-14 1969-01-07 Richard A Textor Elevator for quick assemblage and use in limited access enclosures
US3421599A (en) * 1966-11-15 1969-01-14 William C Schmidt Mobile scaffolding device particularly for fruit picking
US3994365A (en) * 1974-11-04 1976-11-30 Georgia-Pacific Corporation Apparatus for positioning person within container tank
US4044858A (en) * 1974-11-22 1977-08-30 Sverre Munck A/S Maintenance device for use underneath deck structures
WO1988009765A1 (en) * 1987-06-03 1988-12-15 Iev International Pty. Limited Offshore access systems
US5311966A (en) * 1991-08-30 1994-05-17 Glnx Corporation Scaffold system
US20110073411A1 (en) * 2009-09-28 2011-03-31 Barr Fabrication, LLC Collapsible man-lift for use in wind turbine towers
US8365864B1 (en) 2006-05-16 2013-02-05 Sherer Robert P Welders seat for iron workers

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US686159A (en) * 1900-11-03 1901-11-05 Charles S Sprague Platform for painters.
US812620A (en) * 1905-05-23 1906-02-13 Frank Van Alstine Attachment for ladders.
US1864934A (en) * 1927-11-23 1932-06-28 Oliver H Reeves Derrick scaffold
US2575503A (en) * 1948-05-11 1951-11-20 Miller Mfg Co Mechanic's support
US2697776A (en) * 1950-06-12 1954-12-21 Herbert E Wale Photoflash attachment for hand cameras
US3033389A (en) * 1960-09-26 1962-05-08 United States Steel Corp Apparatus for use in lining vessels

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US686159A (en) * 1900-11-03 1901-11-05 Charles S Sprague Platform for painters.
US812620A (en) * 1905-05-23 1906-02-13 Frank Van Alstine Attachment for ladders.
US1864934A (en) * 1927-11-23 1932-06-28 Oliver H Reeves Derrick scaffold
US2575503A (en) * 1948-05-11 1951-11-20 Miller Mfg Co Mechanic's support
US2697776A (en) * 1950-06-12 1954-12-21 Herbert E Wale Photoflash attachment for hand cameras
US3033389A (en) * 1960-09-26 1962-05-08 United States Steel Corp Apparatus for use in lining vessels

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3421599A (en) * 1966-11-15 1969-01-14 William C Schmidt Mobile scaffolding device particularly for fruit picking
US3420332A (en) * 1967-07-14 1969-01-07 Richard A Textor Elevator for quick assemblage and use in limited access enclosures
US3994365A (en) * 1974-11-04 1976-11-30 Georgia-Pacific Corporation Apparatus for positioning person within container tank
US4044858A (en) * 1974-11-22 1977-08-30 Sverre Munck A/S Maintenance device for use underneath deck structures
WO1988009765A1 (en) * 1987-06-03 1988-12-15 Iev International Pty. Limited Offshore access systems
US5311966A (en) * 1991-08-30 1994-05-17 Glnx Corporation Scaffold system
US8365864B1 (en) 2006-05-16 2013-02-05 Sherer Robert P Welders seat for iron workers
US20110073411A1 (en) * 2009-09-28 2011-03-31 Barr Fabrication, LLC Collapsible man-lift for use in wind turbine towers
US8418810B2 (en) * 2009-09-28 2013-04-16 Barr Fabication LLC Collapsible man-lift for use in wind turbine towers

Also Published As

Publication number Publication date
GB961811A (en) 1964-06-24
NL275359A (ja�@�@) 1900-01-01

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