EP1457437A2 - Lastverteilung - Google Patents

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Publication number
EP1457437A2
EP1457437A2 EP04250888A EP04250888A EP1457437A2 EP 1457437 A2 EP1457437 A2 EP 1457437A2 EP 04250888 A EP04250888 A EP 04250888A EP 04250888 A EP04250888 A EP 04250888A EP 1457437 A2 EP1457437 A2 EP 1457437A2
Authority
EP
European Patent Office
Prior art keywords
load spreader
spreader according
end part
cable
plank
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.)
Withdrawn
Application number
EP04250888A
Other languages
English (en)
French (fr)
Other versions
EP1457437A3 (de
Inventor
Patrick John Gorner
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.)
Mercol Products Ltd
Original Assignee
Mercol Products 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 Mercol Products Ltd filed Critical Mercol Products Ltd
Publication of EP1457437A2 publication Critical patent/EP1457437A2/de
Publication of EP1457437A3 publication Critical patent/EP1457437A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • 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
    • B65D88/00—Large containers
    • B65D88/02—Large containers rigid
    • B65D88/12—Large containers rigid specially adapted for transport
    • B65D88/14—Large containers rigid specially adapted for transport by air

Definitions

  • This invention relates to improvements in load spreaders, for use in facilitating the transportation of goods, particularly of air cargo.
  • Air cargo is usually transported within the hold of aircraft supported upon lightweight aluminium sheets in place of pallets.
  • the sheets are intended to bridge between ribs supporting the outer skin of the lower part of the aircraft fuselage, as the skin itself does not have the strength to support loads exerting high pressures.
  • the aluminium sheets themselves however lack rigidity and load bearing capability and thus it is necessary to make use of load spreaders.
  • these are timber planks which are laid on the aluminium sheets and are sufficiently long to bridge the spaces between at least adjacent pairs of fuselage ribs and are sufficiently strong to support the weight of cargo items, and transfer the load to the ribs without affecting the skin panels of the aircraft fuselage.
  • the invention provides a load spreader comprising a plank member characterised in that the plank member is fabricated from a low density rigid polyurethane.
  • the material is preferably a low density polyurethane including a filler which provides a feel and density close to that of timber.
  • the polyurethane material may comprise a blend of low and high molecular weight polyurethane resin, an aliphatic or aromatic polyisocyanate based system, and a low density filler. Pigment and water may also be included.
  • the plank member advantageously includes at least one longitudinally extending reinforcing member, and the reinforcing members may comprise two or more hollow tubes embedded within the member.
  • the reinforcing members are preferably each adapted to allow a cable or cord to be passed through the reinforcing member.
  • Each reinforcing member preferably has a locking device at one or both ends thereof, to fix the position of the plank member on the cable.
  • Each locking member may comprise a rotatable inner member having a part with a longer width and a shorter width and is arranged to be rotatable through at least a quarter turn within an outer fixed member received in an end part of the reinforcing member, the outer fixed member having recesses to receive the longer width of the inner member in one rotational position of the inner member.
  • the inner member may comprise a wider end part having a flattened profile and a circular cross section shank part, the end part having a slit which allows a degree of compressibility to the end pat to clamp the cable and the outer member may have a corresponding wider end part and a narrower part, the wall of the wider end part being split at each side to enable expansion thereof to free the cable and having the recess disposed between the splits, for example at 90° rotational angle.
  • the inner member preferably has an axial passage for the cable or cord.
  • a load spreader according to the invention comprises a plank member 10, having a plurality of reinforcing cores 11, of aluminium tube, of square cross-section.
  • plank member 10 is shown laid upon a sheet 12 of aluminium, which is in turn. laid upon ribs 13 forming reinforcing structure of the floor of an aircraft fuselage, with skin panels 14 between and outside of the ribs 13.
  • the sheet 12 and the plank member 10 bridge at least two adjacent ribs 13. Further, the sheet 12 also has only a low load-bearing capacity, and thus any load is carried by two or more of the plank members 10 which act as load-spreaders and apply the weight of the load at two or more points of the aircraft frame.
  • Fig. 2 is a cross-section taken transversely of the plank member 10, and showing three square cross-sectioned core members 11 extending longitudinally therethrough.
  • the body of the plank member is moulded about the core members 11 from a low density rigid polyurethane material including a high percentage of filler, reckoned on a volume basis, for example between 50 and 80%.
  • a typical composition of the material from which the plank member 10 is made comprises:- Weight % By Weight Blend of low and high molecular weight Polyurethane Resin 803/75DFR 1371gm 45.58% Aliphatic or aromatic Polyisocyanate Based System 1129gm 37.53% Low Density Filler, ad lib 300gm 9.97% Powder Colour Pigment 200gm 6.65% Water 8gm 0.27%
  • the filler may be added to either the polyurethane resin or the polyisocyanate before mixing, or all the components may be blended in a single mixing step, or the filler may be added after mixing of the resin and polyisocyanate.
  • a suitable filler is sometimes supplied ready mixed with one of the precursor components, usually polyol or polyether containing components.
  • the composition also includes a fire retardant and a UV stabiliser.
  • the resulting material When the reaction and curing is completed, including of the effect of the water, which is included as a blowing agent, the resulting material has a specific gravity of about 0.2.
  • the resulting material has tactile and other properties similar to timber, but does not share some of the disadvantages of timber, such as moisture and the ability to split, warp and burn.
  • Fig. 2 is longitudinal cross-section of an end part of the plank member 10.
  • the reinforcing tube 11 has a cable or cord 15 extending axially therethrough, and a locking device, consisting of an outer member 16 and an inner member 17 is provided at both ends of the tube 11.
  • the locking member is described in more detail below, but serves to grip the cord 15 and the plank member 10 so that the plank member 10 will not be displaced along the cord, so that the plank member when in use as a load spreader will be maintained in place, and not be displaced for example by changes in slope of the cargo space floor when the aircraft is climbing, descending or manoeuvring.
  • Figs. 4-6a show the components and operation of the locking device in more detail.
  • the outer member 16 is shown in cross-section in Fig. 5, and includes a bore 18 which has a widened end part 19, and a narrower part 20.
  • the locking device locates within tube 11.
  • the wall of the widened end part 19 is split at each side at 21, so that the wall of the end part has some flexibility and resilience.
  • the inner face of the wall of the widened end part is also provided with axially opposed recesses 22, which are set at 90° from the splits 21, but the wall is also thicker at these parts, making the interior cross-section elliptical.
  • the inner member 17 is received within the outer member 16 and comprises a flattened wide end part 23, a circular cross-section shank part 24, and a square cross-section protruding end part 25 which projects from the outer member 16.
  • the cable or cord 15 extends axially through a passage 26 in the inner member 17.
  • the wall of the flattened wide end part 23 has a slit 27 which extends from the passage 26 to one flattened face of the upper end part 23.
  • Fig. 4a shows the locking device in the unlocked position.
  • the inner member 17 has the flattened wide end part 23 aligned with the splits 21 of the outer member, and with the greater internal diameter thereof.
  • the outer wall is not stretched so that the splits 21 are closed and the end part 23 of the inner member 17 is not subject to compression, so that the slit 27 is open and the cable within passage 26 is not clamped so that relative motion is possible.
  • the inner member 17 is turned through 90° by means of a suitable spanner or lever acting in the square-sectioned end 25, to turn the end part 23 to the Fig. 4b position.
  • the ends of the part 23 engage in the recesses 22, and are subject to pressure due to the reduced internal diameter along the minor axis of the elliptical inner bore, the outer wall of member 16 is expanded so that slots 21 are open, and the inner member end part 23 is subjected to compressive force so that slit 27 is closed and the cable or cord is clamped within the passage 26 and the inner wall of tube 11.
  • the locking device can thus be engaged and disengaged using a suitable spanner or lever on end 25, and the position of the plank member 10 on the cable 15 adjusted and fixed or released as required.
  • the plank member 10 may be of any suitable synthetic material which provides a strong load bearing member which is not prone to water absorption, warping, splitting, cracking or burning.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Nozzles (AREA)
EP04250888A 2003-03-08 2004-02-19 Lastverteilung Withdrawn EP1457437A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0305367 2003-03-08
GB0305367A GB0305367D0 (en) 2003-03-08 2003-03-08 Load spreaders

Publications (2)

Publication Number Publication Date
EP1457437A2 true EP1457437A2 (de) 2004-09-15
EP1457437A3 EP1457437A3 (de) 2005-05-04

Family

ID=9954413

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04250888A Withdrawn EP1457437A3 (de) 2003-03-08 2004-02-19 Lastverteilung

Country Status (2)

Country Link
EP (1) EP1457437A3 (de)
GB (2) GB0305367D0 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523989A (en) * 1966-10-03 1970-08-11 Albin Murer Method of producing structural wall or ceiling elements comprising rigid foamed material and fillers
US3602474A (en) * 1969-08-27 1971-08-31 Lockheed Aircraft Corp Pallet restraint apparatus
US4461798A (en) * 1981-09-21 1984-07-24 Takeshi Uchida Metal-reinfored synthetic wood material
GB2147026A (en) * 1983-09-26 1985-05-01 Muanyagipari Kutato Intezet Externally reinforced polymer concrete structures
WO2001074688A1 (en) * 2000-03-30 2001-10-11 Parkfleet Holdings Limited Improvements to air cargo containers
WO2001086086A1 (en) * 2000-05-05 2001-11-15 U.S. Commercial Service Modular tile for building structures
US20020112653A1 (en) * 2000-08-24 2002-08-22 Moore Roy E. Plastic pallet design

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2121467A2 (en) * 1971-01-15 1972-08-25 Camus Raymond Building panel - with plastic foam core glass fibre reinforced plastic coating and intermediate non-prestressed metal rods
GB1487302A (en) * 1975-01-10 1977-09-28 Cementation Chem Ltd Scaffold boards
FR2715680A1 (fr) * 1994-02-01 1995-08-04 Valencot Francois Poutre isolante.
JPH10266555A (ja) * 1997-03-21 1998-10-06 Takara Giken Kk 足場板
GB0010156D0 (en) * 2000-04-27 2000-06-14 Oxford Plastic Sys Ltd Reinforced moulded article and method of producing same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523989A (en) * 1966-10-03 1970-08-11 Albin Murer Method of producing structural wall or ceiling elements comprising rigid foamed material and fillers
US3602474A (en) * 1969-08-27 1971-08-31 Lockheed Aircraft Corp Pallet restraint apparatus
US4461798A (en) * 1981-09-21 1984-07-24 Takeshi Uchida Metal-reinfored synthetic wood material
GB2147026A (en) * 1983-09-26 1985-05-01 Muanyagipari Kutato Intezet Externally reinforced polymer concrete structures
WO2001074688A1 (en) * 2000-03-30 2001-10-11 Parkfleet Holdings Limited Improvements to air cargo containers
WO2001086086A1 (en) * 2000-05-05 2001-11-15 U.S. Commercial Service Modular tile for building structures
US20020112653A1 (en) * 2000-08-24 2002-08-22 Moore Roy E. Plastic pallet design

Also Published As

Publication number Publication date
EP1457437A3 (de) 2005-05-04
GB0403695D0 (en) 2004-03-24
GB2399334A (en) 2004-09-15
GB0305367D0 (en) 2003-04-16

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