EP0021591B1 - Caillebotis antidérapant - Google Patents

Caillebotis antidérapant Download PDF

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Publication number
EP0021591B1
EP0021591B1 EP19800301638 EP80301638A EP0021591B1 EP 0021591 B1 EP0021591 B1 EP 0021591B1 EP 19800301638 EP19800301638 EP 19800301638 EP 80301638 A EP80301638 A EP 80301638A EP 0021591 B1 EP0021591 B1 EP 0021591B1
Authority
EP
European Patent Office
Prior art keywords
grating
plate
lobes
gripping means
gripping
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
Application number
EP19800301638
Other languages
German (de)
English (en)
Other versions
EP0021591A2 (fr
EP0021591A3 (en
Inventor
William A. Bahnfleth
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.)
Caterpillar Inc
Original Assignee
Caterpillar Tractor 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 Caterpillar Tractor Co filed Critical Caterpillar Tractor Co
Publication of EP0021591A2 publication Critical patent/EP0021591A2/fr
Publication of EP0021591A3 publication Critical patent/EP0021591A3/en
Application granted granted Critical
Publication of EP0021591B1 publication Critical patent/EP0021591B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
    • B21D47/005—Making gratings
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/42—Gratings; Grid-like panels
    • E04C2/427—Expanded metal or other monolithic gratings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/104—Treads
    • E04F11/16—Surfaces thereof; Protecting means for edges or corners thereof

Definitions

  • This invention relates to an anti-slip grating and, more particularly, to an anti-slip grating having non-continuous, self-cleaning lobes.
  • FR-A-2205080 which shows gripping means in the form of a plurality of upwardly projecting spiked lobes with a V-shaped notch between them
  • gripping means in the form of a plurality of upwardly projecting spiked lobes with a V-shaped notch between them
  • openings which do provide a cleaning function, but are shaped in a way that the mid and the like compact in the openings, clogging the opening and rendering the tread less than 100% effective.
  • Some prior art devices have a continuous edge for the contact surface of the tread which edge can become iced and slippery.
  • a grating for use as a work or walking platform including a metal plate and a plurality of gripping means, each gripping means having a plurality of radially inwardly and upwardly projecting lobes defining an opening therebetween, is characterized in that the edge wall of each gripping means is continuously radially inwardly and outwardly smoothly curved along its length to define the lobes and is orientated substantially perpendicularly to the plane of the plate.
  • the present invention has all of the advantages of the prior art devices including an anti-slip tread.
  • the invention has non-continuous gripping edges that are provided by the lobes that stick up to provide the grip desired, the lobes being configured and spaced in a manner to provide self-cleaning characteristics without compacting and accumulating debris.
  • the crests of the lobes have rounded abrading edges for gripping the sole of the footwear or the bottom of a container, or the like, to reduce or eliminate slipping across the surface of the tread.
  • the improved grating or tread is easier and cheaper to manufacture while still maintaining all of the desired features and advantages.
  • Figs. 1 and 2 show one popular prior art grating 10 with a gripping member 12 having a continuous gripping and cleaning edge 14 struck upward from the plane of the grating 10.
  • Each gripping member 12 may be made by positioning a backup die 16, shown in phantom in Fig. 2, against the under surface 18 of the plate 20 whereupon a circular punch 22, shown in phantom in Fig. 2, strikes the plate 20 from above and distorts the plate 20 at the edge 24 of the die 16 to form a conical surface 26 extending angularly away from the plate 20.
  • the punch 22 penetrates the plate 20 leaving the continuous edge 14 about a circular aperture 28 in the plate.
  • the plate After a plurality of gripping members 12 are struck from the plane of the plate 20, the plate is turned over so that the edges 14 project upward for gripping the bottoms of footwear walking on the grating.
  • the apertures 28 will provide clean-out openings into which dirt, mud, ice, and the like can be scraped. It has been found that the conical surfaces 26 are not long enough and the continuous circular edges 14 can become ice coated and less effective than desired. The mud and ice compacts in the apertures 28 and, if it dries or freezes there, reduces the gripping and cleaning ability of the grating.
  • an improved gripping member or rosette 30 is shown struck from a plate 32 to form a grating or tread 34.
  • a plurality of gripping members or rosettes 30 project upward from the plate 32, either in an established pattern or in a random pattern.
  • the pattern of rosettes 30 in the plate 32 forms no part of the invention.
  • Each gripping member or rosette 30 includes, preferably, three or four lobes 36 extending upwardly from the plane of the plate 32.
  • Each lobe 36 is tongue-shaped or has a somewhat parabolic configuration with the lobe 36 connected to the plate 32 along a circular path at a base 38.
  • Each lobe 36 ascends upward and inward to form a crest 40 which is spaced from each crest 40 of the remaining lobes 36 to provide a star-shaped opening or aperture 42 between the lobes 36.
  • Aperture 42 is defined by a continuous wall 41 extending around the edges of the lobes 36 and between adjacent lobes 36.
  • Aperture 42 includes extensions 43 between adjacent lobes 36 which extend from the crest 40 of one lobe to the base 38 thereof and to the crest 40 of an adjacent lobe 36. Portions of wall 41 defining extensions 43 between adjacent lobes 36 are preferably divergent as they extend from base 38 to their respective crests 40, as is best shown in Fig. 4.
  • a punch 44 is provided which has a base 45 adapted to be connected to a moving head of ram 47 of a punch press, or the like, not shown.
  • the punch 44 has a pointed leader 46 and a star-shaped cutting shank 48.
  • the cutting shank 48 may have three or four radially extending flutes 50, each flute having a shape in horizontal cross section conforming to the extensions 43 of the aperture 42 in the resulting rosette 30.
  • Each flute 50 has a flat end 51, the edges 53 of which form the cutting edge for the punch.
  • the punch press has a guide 52 in which is formed an aperture 54 for receiving and guiding the punch 44 therein.
  • a die 56 having circular cutouts or apertures 58, is positioned in the punch press with the axis of each cutout 58 aligned with the axis of an aligned aperture 54 in the guide 52.
  • the die 56 with the cutout or aperture 58 aligned with the punch 44 in the guide 52 forms a backup ring 60 for the punch 44.
  • the sheet or plate of steel 32 is placed on the top surface 62 of the die 56 whereupon the guide 52 is lowered against the top of the plate 32.
  • the punch press is actuated to drive the punch 44 through the plate 32 to form the gripping members or rosettes 30 as the material of the plate 32 is deformed and pierced by the punch 44.
  • the inside diameter of the cutout 58 in the backup ring 60 is slightly larger than the outside diameter of the punch 44 such that the edges 53 of the flat end 51 of the flutes 50 start cutting the plate 32 on the outer periphery of the punch corresponding to the inner periphery of the die 56. This causes the metal of the plate to be split into individual extensions 43 of the lobes 36 as the flutes 50 of the punch 44 pushes more metal ahead of it, to stretch the metal of the plate as it moves through the plate.
  • the walls of the punch 44 will work the walls 41 of the extensions 43 and lobes 36 to shape them along a vertical path or even to give the wall 41 a shape which is slightly inwardly tapered or beveled toward the underside of the plate 32 as shown in Figs. 3 and 4.
  • a small welt or ledge 66 is left around the top edge of the lobes 36 of the rosette 30 when the punch 44 is withdrawn, which welt or ledge 66 forms an additional cleaning edge for the rosette 30.
  • an improved, efficient and inexpensive tread or grating 10 is provided.
  • the individual crests 40 of the lobes 36 bite into the soles of the footwear to grip and hold the footwear in place.
  • the shape of the lobes 36 create extensions 43 in the opening therebetween which, along with the inwardly and downwardly beveled or sloped walls 41, clean mud, ice, and the like, from the soles of the footwear and because of said extensions 43, the residue of mud and ice does not compact in the opening 42.
  • the mud and ice is spread out and dispersed so as to loosen it, thereby causing it to fall through the opening 42 in the grating under its own weight and from the force of the cleaning stroke of the footwear across the grating.
  • the lobes 36 are taller, sharper and provide individual points of contact which improves the anti-skid and the self-cleaning characteristics of the grating 10.
  • the edges of the lobes 36 are non-continuous in a plane thereby giving non-continuous gripping to footwear brought in contact therewith. Non-continuous gripping is considered somewhat preferred in recent United States Government safety specifications.
  • the non-continuous gripping edges of the lobes 36 of the rosettes 30 are not likely to become iced over since pressure on the grating will cause the edges of the crests 40 of the lobes 36 to penetrate and crack the ice loose.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Claims (7)

1. Caillebotis (10) destiné à être utilisé comme plate-forme de travail ou de marche, caillebotis comprenant une plaque métallique (32) et un certain nombre de moyens d'accrochage (30) s'étendant vers le haut à partir du plan de la plaque (32), chaque moyen d'accrochage (30) ayant un certain nombre de lobes espacés (36) faisant saillie vers le haut et radialement vers l'intérieur et délimitant une ouverture (42, 43) entre eux, caractérisé en ce que la paroi (41) de chaque moyen d'accor- chage (30) est incurvée légèrement, de façon continue radialement vers l'intérieur et vers l'extérieur, le long de sa longueur pour délimiter les lobes (36) et est orientée sensiblement perpendiculairement au plan de la plaque (32).
2. Caillebotis (10) selon la revendication 1, dans lequel chaque moyen d'accrochage (30) a une forme générale pratiquement circulaire et comporte une base (38) à sa jonction avec la plaque (32), ainsi que trois ou quatre lobes incurvés (36) faisant saillie vers l'intérieur et vers le haut, chaque lobe convergeant d'une partie relativement large à la base (38) à une partie incurvée relativement étroite à sa crête (40).
3. Caillebotis (10) selon la revendication 1 ou la revendication 2, dans lequel la paroi (41) est biseautée pour contribuer à disperser la boue raclée par les lobes (36) des moyens d'accrochage (30).
4. Caillebotis (10) selon l'une quelconque des revendications 1 à 3, dans lequel la crête (40) de chaque lobe a un bord d'accrochage orienté vers le haut et faisant saillie de façon à présenter un surface non continue à la chas- sure venant au contact du caillebotis (10).
5. Caillebotis (10) selon l'une quelconque des revendications 1 à 4, dans lequel la plaque (32) est une plaque d'acier.
6. Caillebotis (10) selon l'une quelconque des revendications 1 à 5, dans lequel la paroi (41) est perpendiculaire au plan de la plaque (32).
7. Caillebotis (10) selon l'une quelconque des revendications 1 à 5, dans lequel des parties diamétralement opposées de la paroi (41) convergent suivant un petit angle l'une vers l'autre en direction de la face inférieure de la plaque (32).
EP19800301638 1979-06-18 1980-05-19 Caillebotis antidérapant Expired EP0021591B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8912079A 1979-06-18 1979-06-18
WOPCT/US79/00431 1979-06-18

Publications (3)

Publication Number Publication Date
EP0021591A2 EP0021591A2 (fr) 1981-01-07
EP0021591A3 EP0021591A3 (en) 1981-02-04
EP0021591B1 true EP0021591B1 (fr) 1983-05-11

Family

ID=22215803

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800301638 Expired EP0021591B1 (fr) 1979-06-18 1980-05-19 Caillebotis antidérapant

Country Status (4)

Country Link
EP (1) EP0021591B1 (fr)
JP (1) JPS6224562B2 (fr)
CA (1) CA1134589A (fr)
WO (1) WO1980002856A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3684188B2 (ja) * 2001-10-16 2005-08-17 新キャタピラー三菱株式会社 滑り止め構造
JP4113921B2 (ja) 2002-01-09 2008-07-09 新キャタピラー三菱株式会社 建設機械における滑り止め材の製造方法および製造装置
NL1022171C2 (nl) * 2002-12-16 2004-06-18 Richard Euwe Voortman Metalen plaat met antislip-profielen, en stansinrichting.
FR2942984B1 (fr) * 2009-03-16 2011-04-08 Bombrun Marche d'escalier metallique, procede de fabrication d'une telle marche et escalier comprenant une telle marche
US9194119B2 (en) 2012-10-04 2015-11-24 ST Global Partners, LLC Peel and stick decoupling membrane
WO2014067533A1 (fr) * 2012-11-02 2014-05-08 Marel A/S Structure de plaque à surface anticollante destinée à être utilisée comme un matériau de base à faible friction dans un appareil de transformation des aliments et procédé permettant la fabrication de celle-ci
CN103644447A (zh) * 2013-12-05 2014-03-19 庄平 防滑板
CN104032947B (zh) * 2014-05-23 2016-04-06 广西柳工机械股份有限公司 防滑板
JP6376149B2 (ja) * 2016-02-01 2018-08-22 Ｊｆｅスチール株式会社 自動車用ブレーキディスクローター及びその製造方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US538467A (en) * 1895-04-30 Metallic lathing
US1044283A (en) * 1912-03-14 1912-11-12 William D Stanger Die for forming metal staying-strips.
US1166423A (en) * 1914-11-17 1916-01-04 William S Atwood Tread-surface.
US1215235A (en) * 1915-01-14 1917-02-06 William S Atwood Tread-plate.
US1268802A (en) * 1917-03-16 1918-06-04 Joseph E Schumacher Plaster-board.
US1441327A (en) * 1919-06-14 1923-01-09 Blum Julius Nonslipping, cleanable tread
GB220106A (en) * 1923-06-09 1924-08-14 Richard Hawke Rogers Improvements in or relating to concrete structures
US2281822A (en) * 1938-09-24 1942-05-05 Claud H Bills Metal grating
US2590807A (en) * 1947-09-03 1952-03-25 Meteoor Nv Betonfabriek Means for striking lugs of headed form from a metal sheet
US3093216A (en) * 1959-05-12 1963-06-11 Aurora Equipment Co Perforated non-skid panel
FR1389650A (fr) * 1964-01-09 1965-02-19 J B Morel & Cie Caillebotis
BE742078A (fr) * 1969-11-21 1970-05-04
FR2205080A5 (fr) * 1972-10-30 1974-05-24 Merre Jack
US3943589A (en) * 1974-11-05 1976-03-16 Peder Fahrsen Pedersen Gangway element

Also Published As

Publication number Publication date
JPS6224562B2 (fr) 1987-05-29
EP0021591A2 (fr) 1981-01-07
EP0021591A3 (en) 1981-02-04
CA1134589A (fr) 1982-11-02
JPS56500749A (fr) 1981-06-04
WO1980002856A1 (fr) 1980-12-24

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