EP0655533A2 - Profilierte Strassenmarkierungen - Google Patents

Profilierte Strassenmarkierungen Download PDF

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Publication number
EP0655533A2
EP0655533A2 EP94308897A EP94308897A EP0655533A2 EP 0655533 A2 EP0655533 A2 EP 0655533A2 EP 94308897 A EP94308897 A EP 94308897A EP 94308897 A EP94308897 A EP 94308897A EP 0655533 A2 EP0655533 A2 EP 0655533A2
Authority
EP
European Patent Office
Prior art keywords
road marking
embossing wheel
thermoplastic
road
profile
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Withdrawn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
EP94308897A
Other languages
English (en)
French (fr)
Other versions
EP0655533A3 (de
Inventor
Richard H. C/O Prismo Limited Hughes
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.)
Prismo Ltd
Original Assignee
Prismo 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 Prismo Ltd filed Critical Prismo Ltd
Publication of EP0655533A2 publication Critical patent/EP0655533A2/de
Publication of EP0655533A3 publication Critical patent/EP0655533A3/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/16—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings
    • E01C23/20—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings for forming markings in situ
    • E01C23/24—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings for forming markings in situ by pouring
    • E01C23/246—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings for forming markings in situ by pouring comprising means for mechanically working the applied material, e.g. smoothing brushes
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/16—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings
    • E01C23/20—Devices for marking-out, applying, or forming traffic or like markings on finished paving; Protecting fresh markings for forming markings in situ

Definitions

  • This invention relates to a method and apparatus for providing a road marking, such as a centre line, which is profiled in order to provide improved wet night visibility.
  • Road markings such as centre lines, hazard lines and lane markings generally are based on thermoplastic materials or solvent- and water-based paints.
  • Thermoplastic road markings have the advantage of a relatively short hardening time, and may therefore be driven over not long after being applied. This allows traffic disruption to be kept relatively low.
  • the marking is applied by heating the thermoplastic mixture and applying it in a controlled manner onto a prepared road surface by way of a hot spray, screeding or extrusion process.
  • small glass beads may be mixed in with the marking mixture and/or applied to the surface of the mixture after it has been applied, but before it has hardened.
  • These glass beads have predetermined refractive and reflective properties, and are designed to reflect light from vehicle headlamps back towards the driver. While this provides good night visibility in dry conditions, even relatively light rain can drastically reduce the visibility of the road marking by submerging the glass beads which protrude from the surface of the marking, thus altering the refractive and reflective properties of the surface as a whole.
  • EP 0 124 946 Moses Bollag
  • EP 0 124 946 teaches that it is impracticable and irrational to use this method with a thermoplastic road marking mixture because such mixtures harden before there is time to apply a profile.
  • EP 0 124 946 also teaches that it would not be possible to apply and profile a thermoplastic road marking as a continuous process, since it is not possible to arrange for the extrusion device and the profiling device to progress at the same rate over a reasonable distance. Consequently, problems arise if the profiling device starts to lag behind the extrusion device, since the thermoplastic marking material will have hardened by the time it is reached by the profiling device.
  • a method of generating a surface profile on a thermoplastic road marking wherein a profiled embossing wheel is rolled along the road marking after the road marking has been applied but before the road marking has hardened in order to generate a complementary surface profile on the road marking.
  • a method of generating a surface profile on a thermoplastic road marking wherein, a predetermined time after the road marking has been applied but before it has hardened, a profiled embossing wheel is rolled along the road marking in order to generate a complementary surface profile on the road marking.
  • a road marking apparatus comprising application means for applying a thermoplastic road marking to a road surface and a profiled embossing wheel for generating a complementary surface profile on the road marking, wherein the embossing wheel is disposed at a predetermined location behind the application means.
  • the resultant profile may take a much greater variety of patterns than are possible to apply using a shutter-screeding process.
  • the profile applied using a profiled embossing wheel may be rounded, which allows the profile to present a multitude of faces to oncoming traffic, thereby enhancing the reflectivity of the road marking.
  • the thermoplastic road marking is a hot-applied product, 100% solids-based, and comprises a thermoplastic resin binder which may be plasticised and modified with predetermined polymeric additives.
  • the binder may also contain one or more of pigment, extender, reflective glass beads and aggregate.
  • additives to control melt flow behaviour and thixotropic properties may also be included.
  • thermoplastic road marking generally supplied from a boiler mounted on the applicator vehicle, is first applied to the road surface to a thickness of 1 to 10mm, and preferably to a thickness of 2 to 5mm.
  • the method of application may comprise a hot spray, a screeding or an extrusion process.
  • the embossing wheel and the application means are located on a single applicator vehicle. This allows the embossing wheel to follow the application means at a predetermined distance.
  • the distance of the embossing wheel from the application means is adjustable, which allows the system to be tailored to the hardening characteristics of different thermoplastic road markings. The system may be further tailored to individual hardening characteristics through the provision of a speed control mechanism in the applicator vehicle.
  • a coolant for example water or air
  • a coolant is applied to the thermoplastic road marking after it has been laid and before it has been profiled.
  • Good control of cooling is important in achieving the correct profile and cooling rates.
  • the hardening characteristics of the thermoplastic road marking may be further controlled by regulating the application of coolant.
  • Coolant may also be applied to the embossing wheel in order to reduce adhesion to the road marking.
  • Further coolant may be applied after the road marking has been profiled in order to ensure that it has hardened sufficiently to enable early opening of the road to traffic, particularly in conditions of high ambient temperature. At an ambient temperature of 20°C, the hardening time of a thermoplastic road marking cooled in this way can be as little as one minute.
  • the coolant is advantageously applied by way of spray bars mounted on the applicator vehicle.
  • the applicator vehicle is also provided with a reflective glass bead applicator.
  • Reflective beads may then be applied to the surface of the thermoplastic road marking after it has been laid, either before or after the passage of the embossing wheel. Where reflective beads are applied before the passage of the embossing wheel, the wheel has the advantageous effect of pushing the beads at least some way into the surface of the road marking, thereby providing improved embedment and retention of the beads under traffic.
  • the embossing wheel is made out of metal into which the required profile has been cut. Suitable metals include mild steels, stainless steel and aluminium, although other metals may be found to be satisfactory.
  • the embossing wheel may comprise a metal inner provided with a profiled tyre made out of rubber, such as silicon rubber, or out of a synthetic polymer.
  • the width of the wheel is generally somewhat greater than the width of the profiled thermoplastic road marking in order to keep the embossing wheel in contact with the road marking even when the applicator vehicle is driving through a bend.
  • the width of the embossing wheel is around 20cm, but may be from 5cm up to 50cm or even wider for certain applications.
  • the embossing wheel is preferably mounted on the applicator vehicle in a resilient manner so as to apply enough pressure to the thermoplastic road marking to ensure that the surface is adequately profiled.
  • the mounting is adjustably resilient in order to allow varying degrees of profiling.
  • the embossing wheel may be located or mounted on a linkage, such as a "universal joint", which enables correct orientation of the wheel on the road marking even though the applicator vehicle may move about due to crossfalls or deformations in the road surface.
  • the linkage may either be passive or active. In the latter case, a computer-controlled mechanism is provided which actively keeps the embossing wheel in the correct orientation by way of servo control in response to the movement of the applicator vehicle.
  • the pattern on the embossing surface of the embossing wheel may take any suitable form, and the embossing wheel may be releasably mounted in order to allow different embossing wheels to be used in different applications.
  • the depth of the profile is typically around 5mm, but may be from 2mm up to 10mm or even deeper for particular applications.
  • the profile is cut into the surface of the embossing wheel, but in certain applications the profile may project from the surface of the wheel.
  • the embossing wheel may be provided with one or more coolant channels through which coolant may pass.
  • the applicator vehicle 1 of Figures 1 and 2 carries a supply of thermoplastic road marking material in a boiler 2. Connected to the boiler 2, and mounted to one side of the applicator vehicle 1 is an applicator box 3. When the road marking is being applied, the applicator vehicle 1 moves forward and the road marking material (not shown) is applied to the road surface 4 by the applicator box 3. Reflective glass beads (not shown) are then applied by an applicator 5, which is supplied from a vessel 6 via a delivery tube 7. The road marking is then cooled through the application of coolant via spray bar 8. The embossing wheel 9, which is cooled by coolant supplied through spray bar 10, then passes over the still plastic road marking and embosses a predetermined profile into the road marking surface.
  • Figures 3 to 7 show an embossing wheel 9 made out of mild steel with various profile patterns 11 cut into its surface.
  • the profile patterns 11 are around 5mm deep.
  • Figure 8 shows a thermoplastic road marking 12 which has been profiled by an embossing wheel 9' which is provided with a gearwheel profile 11'.
  • the resulting profile 13 of the road marking 12 is complementary to the profile 11' of the embossing wheel 9'.
  • Figure 9 is a plan view of the road marking 12, and shows the profile 13 extending across the width of the road marking.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Road Repair (AREA)
EP94308897A 1993-11-30 1994-11-30 Profilierte Strassenmarkierungen. Withdrawn EP0655533A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9324513 1993-11-30
GB939324513A GB9324513D0 (en) 1993-11-30 1993-11-30 Profiled road markings

Publications (2)

Publication Number Publication Date
EP0655533A2 true EP0655533A2 (de) 1995-05-31
EP0655533A3 EP0655533A3 (de) 1995-09-13

Family

ID=10745870

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94308897A Withdrawn EP0655533A3 (de) 1993-11-30 1994-11-30 Profilierte Strassenmarkierungen.

Country Status (2)

Country Link
EP (1) EP0655533A3 (de)
GB (1) GB9324513D0 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924345A1 (de) 1997-12-17 1999-06-23 Prismo Limited Vorrichtung zum Prägen von Strassenmarkierungen
KR100700038B1 (ko) * 2006-04-27 2007-03-26 주식회사 알에스테크 요철형 노면의 도색장치
US7584902B2 (en) 2003-12-23 2009-09-08 Hofmann Gmbh Maschinenfabrik Und Vertrieb Method and device for creating marking lines

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1534209A1 (de) * 1965-06-09 1969-03-06 Moses Bollag Verfahren und Vorrichtung zur Herstellung einer Markierung auf Strassen sowie damit hergestellte Strassenmarkierung
FR2375394A1 (fr) * 1976-12-24 1978-07-21 Ligne Blanche Revetement routier de signalisation reflechissant perfectionne et son procede de fabrication
DE3029909A1 (de) * 1980-08-07 1982-03-11 Lackfabrik Knackstedt & Fricke Kg, 3012 Langenhagen Verfahren und vorrichtung zur herstellung von markierungen auf fahrbahnen
US4575278A (en) * 1983-01-19 1986-03-11 Whitney James R Rain draining lane marker
WO1994016149A1 (en) * 1993-01-15 1994-07-21 The Rainline Corporation Method and apparatus for applying a night-visible traffic stripe to a road

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1534209A1 (de) * 1965-06-09 1969-03-06 Moses Bollag Verfahren und Vorrichtung zur Herstellung einer Markierung auf Strassen sowie damit hergestellte Strassenmarkierung
FR2375394A1 (fr) * 1976-12-24 1978-07-21 Ligne Blanche Revetement routier de signalisation reflechissant perfectionne et son procede de fabrication
DE3029909A1 (de) * 1980-08-07 1982-03-11 Lackfabrik Knackstedt & Fricke Kg, 3012 Langenhagen Verfahren und vorrichtung zur herstellung von markierungen auf fahrbahnen
US4575278A (en) * 1983-01-19 1986-03-11 Whitney James R Rain draining lane marker
WO1994016149A1 (en) * 1993-01-15 1994-07-21 The Rainline Corporation Method and apparatus for applying a night-visible traffic stripe to a road

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0924345A1 (de) 1997-12-17 1999-06-23 Prismo Limited Vorrichtung zum Prägen von Strassenmarkierungen
US7584902B2 (en) 2003-12-23 2009-09-08 Hofmann Gmbh Maschinenfabrik Und Vertrieb Method and device for creating marking lines
KR100700038B1 (ko) * 2006-04-27 2007-03-26 주식회사 알에스테크 요철형 노면의 도색장치

Also Published As

Publication number Publication date
GB9324513D0 (en) 1994-01-19
EP0655533A3 (de) 1995-09-13

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