EP0943045A1 - Element allonge en plastique extrude servant a constituer des revetements de sol, des planchers ou des sieges - Google Patents

Element allonge en plastique extrude servant a constituer des revetements de sol, des planchers ou des sieges

Info

Publication number
EP0943045A1
EP0943045A1 EP97946992A EP97946992A EP0943045A1 EP 0943045 A1 EP0943045 A1 EP 0943045A1 EP 97946992 A EP97946992 A EP 97946992A EP 97946992 A EP97946992 A EP 97946992A EP 0943045 A1 EP0943045 A1 EP 0943045A1
Authority
EP
European Patent Office
Prior art keywords
top plate
elongated member
plastic material
member according
friction elements
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Withdrawn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
EP97946992A
Other languages
German (de)
English (en)
Inventor
Glenn R. Elsasser
Frederic E. C. Wall
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.)
Western Profiles Ltd
Original Assignee
Western Profiles 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
Priority claimed from CA002192409A external-priority patent/CA2192409C/fr
Application filed by Western Profiles Ltd filed Critical Western Profiles Ltd
Publication of EP0943045A1 publication Critical patent/EP0943045A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/026—Load-carrying floor structures formed substantially of prefabricated units with beams or slabs of plastic

Definitions

  • the present invention relates to an elongated member made entirely or partially of extruded plastic, and suitable for the upper surface of decks, docks, or bench type seating, and for other uses, generally in walking, standing, or sitting areas.
  • patent shows a structure with an overlying cap or "capstock” of between 15 and 25 mils in thickness, formed of a rigid vinyl resin, intended to improve weatherability, and which also has spaced apart, integrally formed, parallel ridges which provide a gripping surface.
  • ribs of the type shown in the Hassman or Groh et al . patents provide little gripping effect in directions parallel to the ribs. In each case, the ribs are formed integrally with the surrounding material and thus have the same hardness or firmness. If the "capstock" of the Groh et al. patent were to be made of soft material it might have greater friction but would wear rapidly in the relatively thin areas between the ribs. Surfaces of the kind described in the Stanley et al patent, or in the Bayly application, are likely to be difficult to produce as part of an extrusion process. There exists a need for a flooring member which can easily be produced by extrusion, and which has a non-skid feature which is effective lengthwise of the member and not only in the cross direction.
  • an elongated member suitable for flooring, decking, or seating comprising a top plate formed as an extrusion of plastic material suitable for overlying a support, wherein the top plate has a non-slip surface provided by ribs constituted by protruding portions of parallel, spaced apart, elongated friction elements co-extruded with the top plate, these elements being formed from plastic material having distinctly greater softness or flexibility than the material forming the main part of the top plate and which is exposed between the friction elements.
  • the softness of the ribs in accordance with this invention is comparable to that of treads on shoes, and gives the ribs enhanced friction in the longitudinal direction, as well as in the transverse direction.
  • the ribs protrude from the top plate between 0.02 and 0.05 inches (0.5mm to 1.3mm).
  • the top plate preferably has inturned edge elements for engaging sides of the support.
  • the support may be a wooden beam or bench, for example as shown in the aforesaid patent to Groh et al., but is preferably an extruded plastic member.
  • a preferred embodiment of the invention is an all plastic, all extruded, elongated member, for example a flooring member, comprising a top plate as described, and an elongated support formed as a relatively rigid extrusion of plastic material having a base plate with upstanding side flanges and a longitudinally extending upstanding support portion positioned between the flanges.
  • the top plate rests on the support portion and has its inturned edge elements held by interengaging formations at the top of the side flanges .
  • Fig.l is a cross-sectional view through a portion of a deck using flooring members according to this invention.
  • Fig.2 is a perspective view of the ends of the two members;
  • Fi .3 is a partial longitudinal section of the end of a member;
  • Figs.4 and 5 are enlarged sectional views of the main components of the flooring member.
  • Fig.l two elongated members 10 in accordance with this invention are shown supported on a wooden joist 12.
  • Each member is made of two parts, shown separately in Figs.4 and 5. These parts include a support 14, shown in Fig.5, and a top plate 16 shown in Fig.4.
  • Each of these parts is integrally formed by extrusion, and the whole of the support, and most of the top plate, are formed of rigid PVC (polyvinyl chloride).
  • the width of each part is between 5 and 6 inches (about 12 to 15 cm), and the wall thickness of each part is about 0.1 inches or 2.5 mm.
  • the support 14 has a base plate 20 with upstanding side flanges 22, and that upper edges of the flanges have outwardly projecting lips 22a.
  • a central region of the support has an upstanding central support portion 24 extending longitudinally of the member, this having a height almost the same as that of the flanges.
  • the central support portion has two outer upstanding webs 26 and a central upstanding web 27, these webs being bridged by a roof member 28, providing an upper support surface.
  • the base plate 20 is fastened to the joists 12 by screws 29 accessible between the flanges 22 and the outer webs 26. Afterwards, the top plate 16 is applied.
  • the top plate shown in Fig.4, is generally flat, except for inturned side edge elements 30 providing inwards facing grooves shaped to be a snap fit onto the lips 22a of the side flanges 22 of the support, and depending ribs 32 which locate against the upper margins of the webs 26.
  • the top plate and support can be snap fitted together, without any holding means being required, the top plate being removable by use of a suitable tool.
  • the top plate is formed of the same rigid PVC as the support, since it is largely flat it is capable of being bent longitudinally, and can be supplied in roll form; alternatively it can be supplied in pre-cut lengths.
  • the top plate needs to be made of a plastic composition which is highly resistant to weathering.
  • the top plate 16 is provided with ribs constituted by the protruding upper portions of rod-like parallel elongated friction elements 35 having their lower portions embedded in the top plate.
  • These friction elements have a roughly circular cross-section of between 0.04 and 0.10 inches (1.0mm to 2.5mm) diameter, and about half the cross-section of each of these elements, usually about 0.02 to 0.05 inches (0.5mm to 1.3mm), protrudes above the generally flat upper surface of the top plate to provide a non-skid surface.
  • Each top plate has five groups of these friction elements, each group comprising four such elements spaced between 0.1 and 0.15 inches (2.5mm and 3.7mm) apart.
  • Elements 35 are also formed of plastic, and are co- extruded with the main part of the top plate.
  • These elements 35 are however of flexible PVC; i.e. they are formed of PVC having considerably more plasticiser than that of the rigid PVC which forms the rest of the top plate and which is exposed between these elements, and have distinctly greater flexibility.
  • the hardness of the flexible plastic forming the friction elements 35 will be between 50 and 90 Durometer hardness on the Shore A scale, and preferably 75 to 85 on this scale, and usually less than 80, compared to the rigid PVC of the remainder of the top plate which has a hardness of between 70 and 90 on the Shore D scale. Measurements on the D scale all relate to hardnesses greater than 95 on the A scale. These figures are for instantaneous hardness as tested according to ASTM D2240.
  • the flexible PVC is similar to material used to produce treads of shoe soles, and has sufficient friction that it has a non- skid effect in the longitudinal direction of the flooring member, as well as in the transverse direction.
  • channel members 37 shown in Fig.3.
  • These channel members which are also of extruded plastic material, have upper and lower flanges which enclose the upper and lower margins of the ends of the flooring members.
  • the lower flanges are fastened to the base plate 20 by screws.
  • the upper flanges 38 have small longitudinal ribs which also provide a non-skid feature.
  • the procedure for the tests involves the use of a heel assembly of suitable material, such as "Neolite” rubber, which is loaded with a 50 pound (22 Kg) weight and pulled along a flooring surface being tested.
  • the static friction is determined by measuring the pull needed to move the heel assembly with a horizontal pull meter, and is done at mutually perpendicular angles, and in both wet and dry conditions.
  • COF coefficient of friction
  • the average pull force for each condition is divided by the weight being used plus the weight of the heel assembly, and a calibration factor is added.
  • two series of tests were done, the first (Table 1) with rubber, and a second (Table 2) with leather.
  • Table 1 Coefficient of Friction Test
  • Tables 1 and 2 show that the coefficient of friction for Applicant's product, when used with rubber (Table 1), is 0.79 and when dry and 0.93 when wet.
  • the comparable friction coefficients for the Groh et al . type product ("Grey decking") are 0.61 and 0.72. While this is a useful increase in friction, more pronounced differences are noted with leather, as shown in Table 2.
  • the coefficients obtained with the Applicant's "Trac-decking” dry and wet, are 1.06 and 0.73 respectively, while the coefficients obtained for the "Grey decking" are 0.62 and 0.58, dry and wet respectively. It will further be noted from Table 2 that the results for the "parallel" direction, i.e.
  • the elongated friction elements 35 may be of different cross-sectional size and shape, for example they may be square or diamond shape in cross-section. What is important is that a proportion of these elements projects above the surface of the top plate by at least 0.02 inches (0.5mm), and amounts of projection up to 0.05 inches (1.3mm) may be used. In order not unduly to weaken the top plate, the friction elements will not penetrate into this more than 1/2 its depth. It is not necessary that PVC be used for the top plate and/or friction elements, and the same effect can for example be achieved with ABS plastics, using a small proportion of plasticiser in the main part of the member and more in the elements 35 so that these are of flexible ABS plastic.
  • top plate it is also possible to form the top plate so that it has a thin capstock, of say .004 to .010 inch (0.1mm to 0.25mm) thickness, of weatherable plastic having good color uniformity, overlying a base layer of cheaper recycled material, both of these materials being of rigid plastic having considerably greater hardness than the friction elements.
  • a thin capstock of say .004 to .010 inch (0.1mm to 0.25mm) thickness
  • weatherable plastic having good color uniformity
  • base layer of cheaper recycled material both of these materials being of rigid plastic having considerably greater hardness than the friction elements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Floor Finish (AREA)

Abstract

Elément allongé servant à constituer des revêtements de sol, des planchers ou des sièges et présentant une plaque supérieure (16) obtenue par extrusion de matière plastique et conçue pour recouvrir un support (14), ladite plaque comprenant des nervures (35) constituées par des parties saillantes d'éléments de friction parallèles, allongés, éloignés les uns par rapport aux autres et extrudés avec ladite plaque, ces éléments de friction étant constitués par du plastique moins dur et plus souple que le matériau constituant la partie principale de la plaque supérieure, et permettant d'obtenir une surface antiglisse. Cet élément peut comporter un support allongé (14) obtenu par extrusion relativement rigide de matière plastique et présentant une plaque de base (20) possédant des brides latérales verticales (22) et une partie support (24) verticale s'étendant dans le sens de la longueur et placée entre les brides, la plaque supérieure étant placée au-dessus du support et possédant des bords (30) s'accouplant aux brides latérales.
EP97946992A 1996-12-09 1997-12-05 Element allonge en plastique extrude servant a constituer des revetements de sol, des planchers ou des sieges Withdrawn EP0943045A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA2192409 1996-12-09
CA002192409A CA2192409C (fr) 1996-12-09 1996-12-09 Element allonge en plastique obtenu par extrusion et servant a la construction de planchers plates-formes, sieges et autres ensembles analogues
PCT/CA1997/000952 WO1998026140A1 (fr) 1996-12-09 1997-12-05 Element allonge en plastique extrude servant a constituer des revetements de sol, des planchers ou des sieges

Publications (1)

Publication Number Publication Date
EP0943045A1 true EP0943045A1 (fr) 1999-09-22

Family

ID=4159414

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97946992A Withdrawn EP0943045A1 (fr) 1996-12-09 1997-12-05 Element allonge en plastique extrude servant a constituer des revetements de sol, des planchers ou des sieges

Country Status (1)

Country Link
EP (1) EP0943045A1 (fr)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9826140A1 *

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