US3603428A - Scaffolding for the tanks of large tanker ships - Google Patents

Scaffolding for the tanks of large tanker ships Download PDF

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Publication number
US3603428A
US3603428A US857663A US3603428DA US3603428A US 3603428 A US3603428 A US 3603428A US 857663 A US857663 A US 857663A US 3603428D A US3603428D A US 3603428DA US 3603428 A US3603428 A US 3603428A
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US
United States
Prior art keywords
cables
tank
wire
scaffolding
strips
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
US857663A
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English (en)
Inventor
Otto Hanses
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19681781270 external-priority patent/DE1781270C3/de
Priority claimed from DE19691906341 external-priority patent/DE1906341C3/de
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3603428A publication Critical patent/US3603428A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
    • B08B9/08—Cleaning containers, e.g. tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • 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
    • E04G3/20—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by walls
    • 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
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
    • E04G3/30—Mobile scaffolds; Scaffolds with mobile platforms suspended by flexible supporting elements, e.g. cables
    • E04G3/305—Mobile scaffolds; Scaffolds with mobile platforms suspended by flexible supporting elements, e.g. cables specially adapted for tanks, silos or similar vessels

Definitions

  • ABSTRACT Scaffolding for the construction, cleaning and Int. Cl E04g 3/00 repair of the interior of the tanks of large tanker ships consists Field of Search 182/ I 38, of permanently emplaced wire netting secured to the sides of 139, 82,128, 222; 114/222, 65 the tank.
  • PATENTEUSEP 7m 3,603,428
  • the present invention relates to scaffolding for the interior of the tanks of large tanker ships, for supporting workmen during the construction, cleaning and repair of the tanks.
  • it is customary to erect wooden scaffolding within the tanks as the construction of the tans proceeds.
  • the scaffolding is removed. But when the tanks are cleaned or repaired, then it is necessary again to erect the scaffolding, and remove it when the cleaning or repair work is completed.
  • a great deal of expensive labor is required to handle the scaffolding; and as the scaffolding is ordinarily wooden, its useful life is limited. It often happens that the erection and removal of this scaffolding consumes the greater portion of the time the ship is at the dock yard.
  • Another object of the present invention is the provision of such scaffolding which will provide a high degree of safety for the workers.
  • the present invention achieves these objects by providing scaffolding which can be erected at the time of construction of the tank and then left in place when the tanker is in use. For cleaning and repair, therefore, when the tank is emptied, the scaffolding will be undamaged and in place.
  • the scaffolding is constructed by wire netting strips supported by wire cables that are detachably secured to the walls of the tank.
  • the netting is in a plurality of tiers, the upper one of which which extends from side to side of the tank and the lower ones of which extend only about the sides of the tank.
  • the wire netting strips are secured to each other, and the tiers below the upper tier have inner guard rails of the same material.
  • Working platforms in the form of corrugated plates rest by gravity on the netting.
  • FIG. 1 is a plan view ofa strip of wire netting for use in the upper tier of the scaffolding
  • FIG. 2 is a view like FIG. 1, but showing the strips that are used at the ends of the upper tier and also that form the lower tiers of wire netting;
  • FIG. 3 is a top plan view of the uppermost tier of wire netting;
  • FIG. 4 is a somewhat schematic fragmentary perspective view of wire netting according to the present invention, showing a working platform in place on the netting;
  • FIG. 5 is a perspective view of a work platform according to the present invention.
  • FIG. 6 is a schematic bottom plan view of one of the lower tiers of scaffolding according to the present invention.
  • FIG. 7 is an enlarged fragmentary cross-sectional view taken on the line VII-VII of FIG. 6;
  • FIG. 8 is a schematic enlarged fragmentary top plan view of a portion of one of the lower tiers of scaffolding according to the present invention.
  • FIG. 9 is an enlarged plan view of one of the fastening members by which the ends of the support cables are secured to the walls of the tank;
  • FIG. 10 is an axial cross-sectional view of the structure of FIG. 9;
  • FIG. 11 is a cross-sectional view taken on the line XI-XI of FIG. 9;
  • FIG. 12 is a schematic fragmentary perspective view showing how access may be had between superposed tiers of the scaffolding
  • FIG. 13 is a somewhat schematic fragmentary plan view showing another arrangement of work platforms on one of the lower tiers of scaffolding of the present invention.
  • FIG. 14 is a cross-sectional view of the structure shown in FIG. 8 or FIG. 13, showing one way of crossbracing the scaffolding.
  • Strip 10 which by itself may be conventional wire netting.
  • Strip 10 is bounded by a frame 12 consisting of a wire cable surrounding and secured to the strip.
  • Sections 14 at the ends of the strip are more closely woven than in the midportions of the strip, and exhibit meshes 16 whose width is much less than that of meshes 18 in the central portion of the strip, preferably by a ratio of 2:].
  • FIG. 2 shows a different embodiment of strip, for use by itself or in combination with strips as in FIG. 1.
  • the FIG. 2 strip 20 comprises wire netting having meshes 16' of the same width as meshes 16 of FIG. 1.
  • FIG. 3 shows the uppermost tier of scaffolding, in the form of a net N which is of a size to stretch from side-to-side and from end-to-end of the uppermost portion of the tank in question.
  • Net N is comprised of end strips 20a and 20s as in FIG. 2, and intermediate strips 10,, 10 etc. as in FIG. 1. All the strips are arranged side by side and parallel to each other with overlapping edges thereby to define a large central field comprised by wide meshes l8 and a marginal area comprised by narrow meshes l6 and 16. If desired, the entire net N can be of uniform mesh width.
  • Cables 24 are interwoven between the overlapping edges of netting strips to secure together the overlapping longitudinal edges of the individual strips. As seen in FIG. 4, the ends of cables 24 are secured to the sidewalls of the tank by means of fastenings 26 whose structure will be described in detail later On. The cables 12 that bound the individual strips can also be secured to the tank walls in the same fashion.
  • cables 22 are threaded through the net N adjacent and parallel to opposite longitudinal sides thereof, on the inner sides of the sections 14 of small meshes 16. Cables 22 are secured to the tank walls at their ends by means of fastenings 27, which are the same as fastenings 26 and whose structure will be described later on.
  • tensioning devices 13 are provided in cables 12 from place to place thereabout, so as to impart the proper tension to the net N.
  • the square fields 32 thus defined between cables 22 and 24 may for example be two meters on a side and thus have an area of about four square meters.
  • Work platforms 30 are disposed on these square fields 32.
  • the platforms 30 are best seen in FIGS. 5 and 8.
  • the platforms 30 are of corrugated metal characterized by downwardly extending depressions 38 at least one of which has a downwardly extending bolt 36 thereon that is designed to extend through the wire netting and prevent lateral move ment of the platform 30.
  • the platforms 30 are so disposed that the sides of the bolts 36 bear laterally against a cable 22 or 24.
  • the platforms 30 are provided with slots 34 therethrough each of which terminates at one end at a bolt 36.
  • the purpose of this construction is so that the platforms can be stacked and will nest with each other, laterally displaced from each other only by the width of a bolt 36, with a series of bolts extending through each slot 34 in stairstep fashion.
  • the platforms will be arranged one by one on the netting and will not be stacked.
  • FIGS. 6-8 show one of the lower tiers of scaffolding of the present invention.
  • the tier is shown roughly square, for use in a tank whose cross section at that point is roughly square; so of course the FIG. 6 embodiment is not used with the FIG. 3 embodiment.
  • the gallery 114 of wire netting consists of horizontal strips of wire netting adjoining and secured to the tank walls, and upright wire netting 115 along the inner margins of the gallery to provide railings for safety purposes.
  • the netting 115 is integral with the horizontal wire netting of the gallery 114.
  • Gallery 114 is supported by wire cables 116, 116', 116", and 120, 120', 120" attached to respective walls 110, 110 and 112, 112 and extending across the tank from wall to wall thereof.
  • the ends of the cables are secured to the sidewalls of the tank by fastenings 122 to be described later on.
  • a wire cable 116 extends along the tank wall in the immediate vicinity thereof and a second wire cable 116" along the inner edge of the gallery.
  • a third wire cable 116 is disposed along the midline of the gallery parallel to and between the cables 116 and 116".
  • Two further wire cables 118 and 118 are provided above cable 116" for the purpose of reinforcing the netting l 15 that forms the guard rail.
  • FIG. 8 also shows another possibility for the interconnection of two strips endwise: a wire coil 124 is woven through overlapping end regions of two strips of netting.
  • FIGS. 9, 10 and 11 show the fastenings for releasably securing the ends of the wire cables to the tank walls.
  • a substantially U-shaped fastener 122 is welded at its closed end to the tank wall and the two legs of the fastener 122 extend outwardly away from the tank wall.
  • An inwardly opening hollow keeper 128 is welded to the free ends of these legs and is characterized by an upwardly open slot 130 and an axial opening for the reception of the cable 120.
  • Each cable end has secured thereto a sleeve 134 whose inner shoulder 132 abuts against keeper 128 when sleeve 134 is fully seated in keeper 128.
  • the sleeve 134 To insert and remove the cable end, the sleeve 134 must be sufficiently near the tank to clear the keeper 128 entirely and to permit the cable 120 to be laid in the full length of slot 130, after which a pull on the cable will seat the sleeve 134 in the keeper 128.
  • FIG. 12 shows a gangway produced through a gallery of the invention by bending apart overlapping edges 144, 146 of adjacent wire netting strips. A ladder can be inserted, while the edges 144 and 146 remain held together fore and aft of the ladder by means of wire coil 148.
  • FIG. 13 shows that work platforms 150 can be somewhat differently arranged from platforms 30, with their corrugations extending lengthwise of the gallery. Several of them can be arranged side-by-side, depending on the width of the gallery. Each platform 150 has two pins 151 projecting downwardly from the depressions of the corrugations, while a slot 152 adjoins each pin 151 to render the platforms nestable and stackable.
  • FIGS. 13 and 14 also show an arrangement for increasing the stability of the scaffold. In order to avoid the necessity of stretching wire cables across the middle of the tank space between the portions of the gallery on opposite sides of the tank, transverse supports 154 are inserted between cables 116 and 116'.
  • the supports 154 are tubes of synthetic resin whose ends are in the form of forks 156 each of which embraces a wire cable to maintain the wire cables spaced against collapse toward each other when loaded.
  • the supports 154 may be adopted, and other forms of securing them to the cables.
  • the cables and netting and plates of the present invention may be of galvanized iron but are preferably of steel coated with polyamide resin to render the steel resistant to sea water and oil.
  • a tanker ship having a tank having upright tank walls, and scaffolding for the interior of the tank, comprising wire cables attached at their ends to said walls, and horizontal wire netting strips supported by and between the cables adjacent said walls.
  • said guard railing comprising wire netting.
  • each said strip being bordered by a wire cable, and means securing said cables to the walls of the tank.
  • said interconnecting means comprising wire coils passing through said overlapping ed es.
  • each work platform resting by gravity on said wire netting, each work platform having at least one downwardly extending projection that extends through the wire netting to restrain lateral movement of the platform on the netting.
  • each work platform having a slot extending from said projection and of a size to receive projections from other work platforms thereby to render said work platforms stackable.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Emergency Lowering Means (AREA)
  • Movable Scaffolding (AREA)
  • Wire Processing (AREA)
US857663A 1968-09-19 1969-09-15 Scaffolding for the tanks of large tanker ships Expired - Lifetime US3603428A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19681781270 DE1781270C3 (de) 1968-09-19 1968-09-19 Arbeitsgerüst
DE19691906341 DE1906341C3 (de) 1969-02-08 1969-02-08 Arbeitsgerüst für Innenraum eines Tanks

Publications (1)

Publication Number Publication Date
US3603428A true US3603428A (en) 1971-09-07

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ID=25755857

Family Applications (1)

Application Number Title Priority Date Filing Date
US857663A Expired - Lifetime US3603428A (en) 1968-09-19 1969-09-15 Scaffolding for the tanks of large tanker ships

Country Status (8)

Country Link
US (1) US3603428A (cs)
JP (1) JPS4915007B1 (cs)
ES (1) ES177225Y (cs)
FR (1) FR2019464A1 (cs)
GB (1) GB1243869A (cs)
NL (1) NL6914191A (cs)
NO (1) NO128702B (cs)
SE (1) SE353365B (cs)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700071A (en) * 1971-07-03 1972-10-24 Reizo Kikuchi Method of erecting suspended scaffolding at construction field and scaffolding erected thereby
US4119176A (en) * 1976-09-29 1978-10-10 Verdu Mira V Fall arrester, for building works
US4944365A (en) * 1989-08-01 1990-07-31 Universal Builders Supply, Inc. Safety net system
US5441126A (en) * 1994-02-25 1995-08-15 Orrick; James Ladder guard
US6003634A (en) * 1995-07-25 1999-12-21 Paul Kristen, Inc. Bridge platform
US6227331B1 (en) * 1997-08-18 2001-05-08 Paul Kristen, Inc. Bridge platform

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2024904A (en) * 1934-09-27 1935-12-17 Ernest G Amesbury Catwalk
US2651789A (en) * 1952-09-12 1953-09-15 Isaac A Newland Life line for boats
FR1387326A (fr) * 1963-12-20 1965-01-29 Dirickx Ets Dispositif de protection utilisable lors de la construction de bâtiments
FR1482175A (fr) * 1966-04-08 1967-05-26 Dispositif de protection du personnel contre les chutes dans les travaux de construction
US3355030A (en) * 1965-12-06 1967-11-28 Norman E Cathcart Door supported adjustable towel rack

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2024904A (en) * 1934-09-27 1935-12-17 Ernest G Amesbury Catwalk
US2651789A (en) * 1952-09-12 1953-09-15 Isaac A Newland Life line for boats
FR1387326A (fr) * 1963-12-20 1965-01-29 Dirickx Ets Dispositif de protection utilisable lors de la construction de bâtiments
US3355030A (en) * 1965-12-06 1967-11-28 Norman E Cathcart Door supported adjustable towel rack
FR1482175A (fr) * 1966-04-08 1967-05-26 Dispositif de protection du personnel contre les chutes dans les travaux de construction

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700071A (en) * 1971-07-03 1972-10-24 Reizo Kikuchi Method of erecting suspended scaffolding at construction field and scaffolding erected thereby
US4119176A (en) * 1976-09-29 1978-10-10 Verdu Mira V Fall arrester, for building works
US4944365A (en) * 1989-08-01 1990-07-31 Universal Builders Supply, Inc. Safety net system
US5441126A (en) * 1994-02-25 1995-08-15 Orrick; James Ladder guard
US6003634A (en) * 1995-07-25 1999-12-21 Paul Kristen, Inc. Bridge platform
US6135240A (en) * 1995-07-25 2000-10-24 Paul Kristen, Inc. Bridge platform
US6138793A (en) * 1995-07-25 2000-10-31 Paul Kristen, Inc. Work platform for use on bridges
US6302237B1 (en) 1995-07-25 2001-10-16 Paul Kristen, Inc. Bridge platform
US6227331B1 (en) * 1997-08-18 2001-05-08 Paul Kristen, Inc. Bridge platform

Also Published As

Publication number Publication date
NO128702B (cs) 1974-01-02
GB1243869A (en) 1971-08-25
NL6914191A (cs) 1970-03-23
JPS4915007B1 (cs) 1974-04-11
SU372790A3 (cs) 1973-03-01
FR2019464A1 (cs) 1970-07-03
ES177225Y (es) 1973-03-16
ES177225U (es) 1972-09-16
SE353365B (cs) 1973-01-29

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