EP0146401A2 - Verfahren und Vorrichtung zur Halterung von rohrförmigen Pfosten - Google Patents

Verfahren und Vorrichtung zur Halterung von rohrförmigen Pfosten Download PDF

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Publication number
EP0146401A2
EP0146401A2 EP84308857A EP84308857A EP0146401A2 EP 0146401 A2 EP0146401 A2 EP 0146401A2 EP 84308857 A EP84308857 A EP 84308857A EP 84308857 A EP84308857 A EP 84308857A EP 0146401 A2 EP0146401 A2 EP 0146401A2
Authority
EP
European Patent Office
Prior art keywords
adaptor
sleeve
post
members
ground
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Withdrawn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
EP84308857A
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English (en)
French (fr)
Other versions
EP0146401A3 (de
Inventor
Geoffrey Lawson Norman Stratham
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
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0146401A2 publication Critical patent/EP0146401A2/de
Publication of EP0146401A3 publication Critical patent/EP0146401A3/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/623—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection
    • E01F9/631—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection specially adapted for breaking, disengaging, collapsing or permanently deforming when deflected or displaced, e.g. by vehicle impact
    • E01F9/635—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection specially adapted for breaking, disengaging, collapsing or permanently deforming when deflected or displaced, e.g. by vehicle impact by shearing or tearing, e.g. having weakened zones

Definitions

  • the present invention relates to improvement in methods and apparatus for supporting tubular posts and like structures.
  • Tubular post structures are frequently used to carry road signs and are positioned adjacent carriageways.
  • the method of supporting such structures generally involves Isetting the base of the post in concrete contained in a hole formed in the ground.
  • these posts are often damaged by vehicles colliding with them, and since the posts are rigid and set in concrete such collisions often cause severe damage to the vehicle, e.g. through breaking off or folding at or above the point of impact and falling backwards onto the roof of the vehicle.
  • the posts themselves are generally damaged to such an extent that they have to be replaced.
  • Such replacement is a relatively expensive procedure requiring the removal of the damaged post, its concrete base and setting a replacement post in fresh concrete.
  • British Patent No. 958,657 describes a street post or runway marker comprising a tubular post mounted on a rubber base.
  • British patent No. 1,123,202 describes a post that is detachably secured to a ground embedded plate.
  • a traffic bollard comprising a centre post surrounded by a hollow casing and it is provided that the post is connected to a base via a portion weaker than the base or post such that it bends or breaks following a collision.
  • the present invention may be used to join together any two members that have, or can include, tubular end portions that are required to be in abutting or substantially abutting relationship and in which the joined structure is required to shear or bend at the said abutting ends when one member is subjected to a heavy impact.
  • tubular end portions that are required to be in abutting or substantially abutting relationship and in which the joined structure is required to shear or bend at the said abutting ends when one member is subjected to a heavy impact.
  • tubular end portions that are required to be in abutting or substantially abutting relationship and in which the joined structure is required to shear or bend at the said abutting ends when one member is subjected to a heavy impact.
  • a hollow sleeve first member is sunk into the ground and secured in position, for example by concrete, with the top at ground level.
  • An adaptor which is an interference fit, is then inserted part way into the sleeve so that a portion of the adaptor extends upwardly therefrom.
  • the second member e.g. a tubular post, is then fitted over the extending portion of the adaptor and is again an interference fit.
  • the present invention provides a method for joining two members having tubular end portions to provide a joined structure that is required to extend susbstantially vertically above the ground comprising:
  • the invention provides an adaptor for use with the said method and comprising a first portion dimensioned to be an interference fit in the first said member and a second portion dimensioned to be an interference fit in the second said member, the adaptor being formed from a material that is more malleable or is weaker, at least around a line lying between the abutting ends of the said members, than the material from which the said. second member is formed.
  • a characteristic feature of the adaptor which is preferably annular in cross-section is that it will shear or bend, at the junction of the post and sleeve, with minimal damage to the second member, as a result of an impact on the said member.
  • the material from which the adaptor is formed therefore should be weaker at least in area adjacent the post and/or more malleable than the material forming the post and the sleeve.
  • a line of weakness may be introduced around the periphery of the adaptor adjacent the junction between the sleeve and second member.
  • Such a line of weakness may, for example, be introduced by forming a groove around the adaptor or by drilling a series of holes around its periphery, i.e. the adaptor may be perforated.
  • the strength or malleability of the adaptor is predetermined by controlling the wall thickness thereof.
  • the materials from which the adaptor may be formed include plastics materials such as polypropylene, polyvinylchloride or nylon or metallic materials such as aluminium. Other materials may of course be used provided that they have an area of relative weakness adjacent the junction between the tubular portions of the structures being joined.
  • the adaptor preferably includes outwardly extending flange around its periphery to define the extent to which it projects into the tubular structures and to ensure that the designed minimum length of adaptor projects into each tube.
  • the adaptor preferably has the same cross-sectional shape as the tubular portions of the member and sleevein order to meet the strength requirements, the most preferred cross-sectional shape being circular. It may however, be acceptable to use an adaptor of a non-circular cross-section e.g., hexagon shaped to engage in circular section tubular members.
  • the adaptor may include outwardly extending projections, e.g., a plurality of rows of gripping chevrons to provide lead-in portions, however, such chevrons should be formed only at the end portions of the adaptor.
  • the members to be joined need not be tubular along their whole length, it is required only that they have tubular end portions to receive the adaptor. Furthermore the tubular end portions need not be of circular cross-section, for example, they may have a rectangular cross-section, as in a traffic bollard.
  • ground is intended to include “roadway”, “track”, “footpath” and “runway”.
  • an adaptor generally indicated at 1 includes a lower portion 2 of circular cross-section and an upper portion 3 of the same cross-section separated by an outwardly extending flange portion 4.
  • the flange is midway between the top 5 and bottom 6 ends of the adaptor.
  • the adaptor has a length of 21 cm, an external diameter of 6.85cm and a wall thickness of 9.25mm.
  • the flange has a thickness of 1 cm and projects 1 cm from the adaptor wall.
  • a line of weakness is introduced immediately adjacent the flange 4 by forming a series of holes 7 around the periphery of the adaptor just above the flange.
  • the ends 5 and 6 are chamfered to allow ease of insertion into hollow tubular structures.
  • a mild steel sleeve of 40 cm length and 6.8 cm internal diameter is concreted into a hole in the ground to form a secure base.
  • the adaptor 1 is then driven into the sleeve until the flange 4 lies on top of the sleeve.
  • a post carrying a road sign and of length 2 m and 6 8. cm internal diameter is then driven onto the upper portion 3 of the adaptor.
  • a secure structure is obtained which is sufficiently strong to withstand normal pressures which may be applied perpendicularly to the upper end portion of the post, for example, pressure applied by wind directed against the flat surface of the sign being carried by the post.
  • the structure meets the strength requirements of the aforesaid British Standard.
  • the material forming the adaptor may be more malleable than that of the post so that, in similar circumstances, the impact will cause the adaptor to bend at the junction of the post and sleeve, i.e. it acts as a hinge, again minimising damage to the post and the colliding vehicle.
  • Such an arrangement has the advantage that it would avoid the possibility of the post falling "backwards" onto a colliding vehicle which would happen if the point of impact were low and the post relatively high.
  • the strength of the adaptor e.g. along a line of weakness in respect of the force or impact required to cause it to shear or bend can be predetermined to suit particular applications.
  • the impact strength of the adaptor is achieved by controlling the thickness of the adaptor wall, in general the thicker the wall the greater the impact needed to fracture the adaptor or cause it to hinge along a line. between the ends of the posts.
  • the wall thickness may be constant along the full length of the adaptor.
  • FIG. 2 is a section through the lower end of a traffic sign post.
  • the post generally indicated at 20 has an upper tubular steel portion 21 extending above ground level 10 and at the top end of which is carried a road sign (not shown).
  • a lower tubular steel portion 22 extends below ground level and is firmly secured in position by a mass of concrete 23.
  • the internal diameter of tubular portions 21 and 22 is 6.8 cm and a wall thickness of 8 mm.
  • the adaptor joining portion 21 and 22 of post 20 is indicated at 11 and consists of a lower tubular portion 12 and upper tubular portion 13, separated by flange 14.
  • the length of the adaptor is 21 cm, the external diameter is 6.85cm and it has a wall thickness of 10.25 mm.
  • Flange 14 is 1 cm thick and extends 1 cm outwardly of the adaptor wall.
  • the upper 3 cm of portion 13 and the lower 3 cm of portion 12 of adaptor 11 contains four rows of chevrons 15 and 16 to provide lead-in portions.
  • the tube 20 is formed by rolling and welding a seam projects into the tube along the full length thereof.
  • the presence of the chevrons 16 on portion 12 enables the adaptor to be lined up concentrically with portion 22 of the tube, the chevrons being compressed by the projecting seam. The adaptor can then be driven home into the tube.
  • the presence of chevrons 16 on portions 21 of tube 20 enables the tube 15 to be aligned with the upper portion 13 of adaptor 11 before it is driven down onto the adaptor.
  • the post 20 meets the requirements of the British Standard. If the post is hit by a motor vehicle it fractures across a line immediately above flange 14 and falls forwardly away from the colliding vehicle.
  • the invention also has the advantage that it permits the use of "snap" connectors in any electrical cabling that might extend along the post.
  • a "snap” connector would be positioned to be adjacent the area of weakness in the adaptor so that, following an impact causing the adaptor to shear or bend, the connector would "snap” apart and the upper portion of the post would be electrically isolated from the mains supply.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Signs Or Road Markings (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
EP84308857A 1983-12-20 1984-12-18 Verfahren und Vorrichtung zur Halterung von rohrförmigen Pfosten Withdrawn EP0146401A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8333854 1983-12-20
GB838333854A GB8333854D0 (en) 1983-12-20 1983-12-20 Supporting tubular posts

Publications (2)

Publication Number Publication Date
EP0146401A2 true EP0146401A2 (de) 1985-06-26
EP0146401A3 EP0146401A3 (de) 1986-04-16

Family

ID=10553547

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84308857A Withdrawn EP0146401A3 (de) 1983-12-20 1984-12-18 Verfahren und Vorrichtung zur Halterung von rohrförmigen Pfosten

Country Status (2)

Country Link
EP (1) EP0146401A3 (de)
GB (2) GB8333854D0 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654163A1 (fr) * 1989-11-08 1991-05-10 Signalisation Cale Citadine Element tubulaire a zone privilegiee de rupture et son mode de fixation sur un support permettant son remplacement aise et rapide.
FR2727446A1 (fr) * 1994-11-25 1996-05-31 Trougouboff Emile Tube pour mobilier urbain et routier
NL1005588C2 (nl) * 1997-03-20 1998-09-22 Zeus Beton Bv Paalsok en paalsamenstel met een paalsok.
ITBO20090242A1 (it) * 2009-04-20 2010-10-21 Tecnoroad S N C Di Tinti Moreno Elemento di sostegno per segnaletica stradale, e simili.
EP2400060A1 (de) 2010-06-24 2011-12-28 Hunter Douglas Industries B.V. Pfosten mit zerbrechlichem Rohrabschnitt
EP2581495A2 (de) 2011-10-12 2013-04-17 Costam S.r.l. Stützvorrichtung für Straßenschilder
FR3114601A1 (fr) 2020-09-28 2022-04-01 Pierman Système d’assemblage d’au moins deux parties d’un corps creux

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349531A (en) * 1964-07-16 1967-10-31 George H Watson Frangible connector assembly for stanchions, poles and standards
DE2150316A1 (de) * 1971-10-08 1973-04-12 Benninger Edgar Verbindung fuer 2-teilige rohrartige staender fuer verkehrszeichen
DE2309249A1 (de) * 1973-02-24 1974-08-29 Kurt Konrad Gustav Karl Nagl Standsaeule mit verformungseinrichtung
DE2319229A1 (de) * 1973-04-16 1974-10-31 Hanns Nuessel Pfahl fuer freistehende hinweisschilder
US4021977A (en) * 1976-03-19 1977-05-10 Foresight Industries Reusable yielding post supports
GB1574061A (en) * 1977-08-23 1980-09-03 Chisholm D Breakaway coupling assembly with fracture-initiating washer
DE8016501U1 (de) * 1980-10-23 Dambach-Werke Gmbh, 7560 Gaggenau Vorrichtung zum Verbinden eines Ständerrohres eines Verkehrszeichens o.dgl. mit der Einstecktasche eines Standfußes o.dgl
FR2500505A1 (fr) * 1981-02-24 1982-08-27 Pinoteau Lucien Balise routiere et son procede d'ancrage
EP0065660A2 (de) * 1981-05-18 1982-12-01 Board Of Control Of Michigan Technological University Bauelement aus Holzmischmaterial
EP0099070A2 (de) * 1982-07-10 1984-01-25 Eberhard Hoeckle Verkehrszeichenträger
EP0100803A1 (de) * 1982-08-10 1984-02-22 Lucien Pinoteau Strassenleitpfosten
EP0137712A2 (de) * 1983-09-03 1985-04-17 J.N. Roskell Limited Pfosten

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT266201B (de) * 1963-09-13 1968-11-11 Bertram K G J Sicherheitszaun für Straßen
US3623286A (en) * 1969-09-19 1971-11-30 Parduhn Alfred D Breakaway post
FR2165299A5 (de) * 1971-12-24 1973-08-03 Gmt Sa
DE3069911D1 (en) * 1980-10-13 1985-02-14 Esv Konsult Ab Traffic safe pole
BE893094A (fr) * 1982-05-06 1982-08-30 Zephir Dauby Et Fils S P R L Poteau de signalisation routiere notamment catadioptre

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8016501U1 (de) * 1980-10-23 Dambach-Werke Gmbh, 7560 Gaggenau Vorrichtung zum Verbinden eines Ständerrohres eines Verkehrszeichens o.dgl. mit der Einstecktasche eines Standfußes o.dgl
US3349531A (en) * 1964-07-16 1967-10-31 George H Watson Frangible connector assembly for stanchions, poles and standards
DE2150316A1 (de) * 1971-10-08 1973-04-12 Benninger Edgar Verbindung fuer 2-teilige rohrartige staender fuer verkehrszeichen
DE2309249A1 (de) * 1973-02-24 1974-08-29 Kurt Konrad Gustav Karl Nagl Standsaeule mit verformungseinrichtung
DE2319229A1 (de) * 1973-04-16 1974-10-31 Hanns Nuessel Pfahl fuer freistehende hinweisschilder
US4021977A (en) * 1976-03-19 1977-05-10 Foresight Industries Reusable yielding post supports
GB1574061A (en) * 1977-08-23 1980-09-03 Chisholm D Breakaway coupling assembly with fracture-initiating washer
FR2500505A1 (fr) * 1981-02-24 1982-08-27 Pinoteau Lucien Balise routiere et son procede d'ancrage
EP0065660A2 (de) * 1981-05-18 1982-12-01 Board Of Control Of Michigan Technological University Bauelement aus Holzmischmaterial
EP0099070A2 (de) * 1982-07-10 1984-01-25 Eberhard Hoeckle Verkehrszeichenträger
EP0100803A1 (de) * 1982-08-10 1984-02-22 Lucien Pinoteau Strassenleitpfosten
EP0137712A2 (de) * 1983-09-03 1985-04-17 J.N. Roskell Limited Pfosten

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654163A1 (fr) * 1989-11-08 1991-05-10 Signalisation Cale Citadine Element tubulaire a zone privilegiee de rupture et son mode de fixation sur un support permettant son remplacement aise et rapide.
FR2727446A1 (fr) * 1994-11-25 1996-05-31 Trougouboff Emile Tube pour mobilier urbain et routier
NL1005588C2 (nl) * 1997-03-20 1998-09-22 Zeus Beton Bv Paalsok en paalsamenstel met een paalsok.
ITBO20090242A1 (it) * 2009-04-20 2010-10-21 Tecnoroad S N C Di Tinti Moreno Elemento di sostegno per segnaletica stradale, e simili.
EP2400060A1 (de) 2010-06-24 2011-12-28 Hunter Douglas Industries B.V. Pfosten mit zerbrechlichem Rohrabschnitt
EP2581495A2 (de) 2011-10-12 2013-04-17 Costam S.r.l. Stützvorrichtung für Straßenschilder
FR3114601A1 (fr) 2020-09-28 2022-04-01 Pierman Système d’assemblage d’au moins deux parties d’un corps creux

Also Published As

Publication number Publication date
GB8431939D0 (en) 1985-01-30
EP0146401A3 (de) 1986-04-16
GB2151677A (en) 1985-07-24
GB2151677B (en) 1988-01-20
GB8333854D0 (en) 1984-02-01

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