EP0994982B1 - Verfahren zur herstellung eines pfahles und mit diesem verfahren hergestellter pfahl - Google Patents

Verfahren zur herstellung eines pfahles und mit diesem verfahren hergestellter pfahl Download PDF

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Publication number
EP0994982B1
EP0994982B1 EP98901656A EP98901656A EP0994982B1 EP 0994982 B1 EP0994982 B1 EP 0994982B1 EP 98901656 A EP98901656 A EP 98901656A EP 98901656 A EP98901656 A EP 98901656A EP 0994982 B1 EP0994982 B1 EP 0994982B1
Authority
EP
European Patent Office
Prior art keywords
sheet
jacket
strips
post
sheet material
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 - Lifetime
Application number
EP98901656A
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English (en)
French (fr)
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EP0994982A1 (de
Inventor
Lars Svensson
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Individual
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E04H12/08—Structures made of specified materials of metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
    • 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
    • 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

Definitions

  • This invention relates to posts generally and especially to posts of the kind which give way when hit by e.g. a vehicle.
  • a number of manufacturing methods for the latter kind of post are known.
  • One known method includes the steps of intermittently securing along each intended longitudinal bending line of a sheet metal jacket, a metal rod and subsequently bend the sheet metal over the rods into a polygonal shape and join the opposing edges thereof.
  • This known method includes welding procedures as each rod is intermittently welded to the jacket, the weld spots adapted to form failure or rupture points causing the collapse of the post when it is hit by a car and also on the closing of the longitudinal joint takes place by welding. This means that rust proofing such as galvanising has to take place after the completion of the post.
  • the jacket material of the known post - in order to be able to yield when hit by a car - preferably should have a low plasticity strength and accordingly be thin. The buckling tendency of this material however, counteracts this and the thickness can not be too much reduced in order to secure the necessary resistance against normal stresses such as wind
  • One important aspect with this invention is to bring about an new method for producing posts especially such posts which have the ability to give way when hit, which method is highly simplified and facilitates the process. In the new process no temperatures causing warping have to be used and neither any rust proofing damaging measures.
  • Another important aspect is to bring about a new post which has an enhanced ability to give way when hit, but during normal load has the necessary stability.
  • the method according to the invention involves the steps of sizing a thin material sheet for the intended length and circumference of the post, placing on top of such sheet a number of thicker material strips discretely arranged with gaps between them, affixing the strips to the sheet, rolling the sheet together into polygon shape by causing the sheet portions between the strips to bend, and joining the free edges outside the outermost strips thus forming a hollow polygonal post.
  • the result will be a composite jacket wall with high buckling resistance.
  • the post according to the invention is characterised by a thin jacket material and thicker material strips affixed thereto for forming a polygonal where the doubled sides have more strength and buckling strength and stiffness than the bent jacket sheet material portions between them resulting in a guided rupture function of the said sheet material portions when a vehicle hits the post and a subsequent collapse of the entire post takes place due to a continuing rupture of at least some of the sheet material portions.
  • This makes it possible to give the post a controlled predeterminable retarding resistance effect.
  • the basic parts of the post to be manufactured is a jacket sheet 1 and a number of strips 2 affixed to the sheet separated from each other.
  • a thin gauge metal sheet preferably a steel sheet, is sized and confectioned so its length meets the intended height of the post and its width corresponds to the intended circumference thereof.
  • material strips 2 which are thicker than the sheet material used for the jacket and preferably are made of strip steel. The strips are affixed to the sheet material 1.
  • the sheet 1 as well as the strips 2 are galvanised or otherwise corrosion or rust proofed before assembling.
  • the fixation is achieved by means of heat curable or hardening adhesive material or thermoplastics material applied on the sheet material 1 at least along the areas intended for the strips 2 and/or on the underside of the strips 2.
  • the combination of sheet and strips is heated or otherwise treated, e.g. by ultrasonic devices, in order to activate the affixing material or soften or melt the said material, resulting in an affixing of the strips to the sheet.
  • the sheet and strips unit is then rolled together and in this procedure the sheet material portions 3 between the strips 2 will be bent resulting in the shaping of a polygonal hollow pipe with a number of flat sides.
  • the longitudinal edges 4 of the sheet 1 are joined in an appropriate way e.g. by folding, bending and squeezing or the like method.
  • the sheet and/or the strips are provided, preferably already on the production thereof, with a coating of thermoplastics type and upon arranging the strips on top of the sheet a rather moderate, i.e. 100 - 250° C heating takes place.
  • a rather moderate, i.e. 100 - 250° C heating takes place.
  • the plasticizing of the plastics material followed by a setting thereof results in a very stable connection of the strips to the sheet.
  • a preferred way of arranging the production described below is regarded to be both cost and production efficient.
  • a first sheet 1 of thin gauge steel sheet On the sheet 1 are placed in the appropriate positions, the required number of steel strips 2.
  • the length of the strips is preferably, as indicated, somewhat greater than the length of the sheet 1 so that ends 5 project outside the ends of the sheet.
  • the selected type of fixation material is spread on the appropriate areas of the sheet and/or on the underside of the strips. If precoated sheets and/or strips are used only the positioning of the strips is necessary.
  • a second sheet 1 Upon the first sheet 1 with its number of strips 2 placed thereon, a second sheet 1 is placed and a number of strips 2 placed upon it and then a third and fourth sheet with strips up to a pre-set number are stacked upon each other. On stacking the correct positioning of the strips is facilitated by aligning the ends 5 of each added strip 2 with the projecting ends 5 of already positioned strips.
  • the curable or heat meltable and hardening fixation material or coating is provided on the upwardly facing strip receiving side portions of each sheet and/or on the downwardly facing surface of each strip.
  • a flexible airtight cover C e.g. of tarpaulin type and the edges of the cover are pulled down towards the supporting table T surface and in an appropriate way sealingly tightened to the table surface.
  • a vacuum pump is used for evacuating the air inside or below the cover C so that the outside atmospheric pressure, in per se known fashion, is allowed to press the stack downwardly towards the table T and press the strips against their sheets.
  • the heating necessary in most cases can be achieved in several different ways.
  • the entire stack of sheets and strips is heated by hot air before the compression, the air made to pass along the stack and through the multitude of slot like channels formed between each pair of adjoining strips and sheets defining channel top and bottom.
  • a special heating or curing enhancing device D shown. After being activated the device is arranged to heat the stack or otherwise bring about a curing as the table T with the stack passes the device.
  • the table T can, naturally, also be stationary and the heating device D movable. As only a comparatively low temperature is needed the heating has no detrimental effect on the stacked material such as warping or bending.
  • the curing period is over the vacuum is released and the cover C removed. The sheets with affixed strips are then ready for bending and edge joining.
  • the heating of the stack can also be achieved by heating a specific type of stationary table so that the heat dissipates upwardly into the stack.
  • One preferred way of heating is by means of a device D of electromagnetic type shown in the drawing.
  • the steel material of the sheets 1 and the strips 2 will be heated on the passage of the table T and the compressed stack thereupon between the electromagnetical devices D.
  • the heating, although rather low, of the steel material will cause the fixation material to cure or melt and harden and to plasticize, respectively.
  • Another way of causing the necessary heating is by means of ultrasonic devices tuned at the structure of the adhesive or plastics and causing it to cure or soften.
  • the strips are placed upon the sheet. It is, however, obvious that the method also can be performed the opposite way, i.e. by placing the strips 2 at a set distance from each other on an appropriate table and place the sheet upon the strips.
  • the bending of the sheet with strips affixed thereto and the joining of the longitudinal edges of the sheet takes place in an appropriate per se known device.
  • the joining is preferably a rather conventional folding, bending and squeezing procedure, similar with the procedure used for sheet metal. This method can be used as the thickness or gauge of the sheet is very thin.
  • the resulting post is very stable and able to withstand normal stresses, but will give way when hit by say a vehicle.
  • the giving way ability is achieved thanks to the construction of the post, and more in detail because of the thin bent comer portions joining the intermediary flat areas stabilised by the strips.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Stringed Musical Instruments (AREA)
  • Laminated Bodies (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Piles And Underground Anchors (AREA)

Claims (10)

  1. Verfahren zur Herstellung eines vieleckigen Pfostens mit einem Blattmaterialmantel und innerhalb desselben angeordneten Verstärkungen, dadurch gekennzeichnet, dass es die folgenden Massnahmen umfasst:
    Zuschneiden eines Mantelmaterialblatts (1) dünner Stärke derart, dass dessen Länge im wesentlichen der gewünschten Höhe und dessen Breite im wesentlichen derjenigen des gewünschten Umfangs des Pfostens entspricht,
    Zuschneiden einer Anzahl Blattmaterialstreifen (2), vorzugsweise dickerer Materialstärke, derart, dass deren Länge mindestens der Länge des Mantelmaterialblatts (1) entspricht und deren Breite im wesentlichen der gewünschten Breite jeweils einer Seitenfläche des vieleckigen Pfostens entspricht, diese jedoch nicht übersteigt,
    Auftragen einer aktivierbaren Verbindungsmasse auf die Oberfläche des Mantelmaterialblatts (1) und/oder auf der einen Seite der Blattmaterialstreifen (2),
    Auflegen der Blattmaterialstreifen nebeneinander und in einem Abstand voneinander entlang dem Mantelmaterialblatt,
    Aktivieren der Verbindungsmasse zwecks Befestigung der Streifen am Mantelmaterialblatt,
    Zusammenfalten des Mantelmaterialblatts durch Biegen desselben entlang den länglichen Abschnitten (3) zwischen den Streifen (2) in eine vieleckige, hohle Form und
    Verbinden der Längskanten (4) des Mantelmaterialblatts (1), um eine geschlossene vieleckige Pfosteneinheit zu bilden.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das Mantelmaterialblatt (1) so geformt wird, dass dessen Breite zur einen Seite hin abnimmt und die Streifen (2) jeweils so geformt werden, dass deren Breite zur einen Seite hin entsprechend abnimmt.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass eine Verbindungsmasse gewählt wird, die durch eine äussere Einwirkung aktivierbar oder härtbar ist.
  4. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als Material für das Mantelblattmaterial ein Stahlblech dünner Stärke gewählt wird und als Material für die Streifen ein Stahlblech, welches mindestens so dick, vorzugsweise dicker ist als das Mantelblattmaterial.
  5. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass als Verbindungsmasse ein unter Wärmeeinwirkung härtbarer Stoff gewählt wird.
  6. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass eine Anzahl zugeschnittener Mantelmaterialblätter (1) mit jeweils einem Satz zugeschnittener Blattmaterialstreifen (2) und jeweils zwischen dem Mantelmaterialblatt und den Streifen angebrachtem Befestigungs-Klebstoff bis zu einer bestimmten Höhe aufeinandergestapelt werden,
       der auf einer luftdichten Auflage (T) ruhende Stapel mit einer biegsamen, luftdichten Abdeckung (C) bedeckt wird, welche zusammen mit der Auflage eine luftdichte Hülle bildet,
       die Luft aus dem Inneren der Hülle herausgepumpt wird, so dass der Stapel aus Blechen und Streifensätzen durch den Atmosphärendruck zusammengedrückt wird,
       ein auf die Kleb- und Verbindungsmasse wirkender Auslöser (D) aktiviert wird, um eine bleibende Verbindung zwischen den Mantelblättern (1) und den Streifensätzen (2) herzustellen,
       der Stapel aufgedeckt wird, jedes Blatt mit den daran befestigten Streifen von den anderen gelöst, gebogen oder zusammengefaltet und an den Längskanten (4) verbunden wird, um eine hohle Pfosteneinheit zu bilden.
  7. Vieleckiger Pfosten mit einem Blattmaterialmantel und inneren Versteifungsmitteln, dadurch gekennzeichnet, dass das Mantelblattmaterial (1) ein biegbares Metall dünner Stärke ist und die Versteifungsmittel aus länglichen Streifen (2) aus einem Blechmaterial dickerer Stärke bestehen, welche schmäler sind als die inneren Seiten des vieleckigen Pfostens, und dass
       die länglichen Streifen (2), welche jeweils eine Länge mindestens entsprechend der Länge des Mantelmaterialblatts aufweisen, mit den genannten Seiten des Pfostens derart verbunden sind, dass an jeder Biegung des Pfostens ein unbedeckter Abschnitt (3) des Mantelblattmaterials verbleibt.
  8. Vieleckiger Pfosten nach Anspruch 7, dadurch gekennzeichnet, dass die Breite des Mantelblattmaterials im ungefalteten Zustand zur einen Seite hin abnimmt und
       die Breite der Streifen jeweils ebenfalls zur einen Seite des Streifens hin abnimmt.
  9. Pfosten nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass die länglichen Streifen (2) auf der nach innen gewandten Seite des Mantelmaterials (1) angebracht sind.
  10. Pfosten nach Anspruch 8 oder 9, dadurch gekennzeichnet, dass die Endbereiche (5) der Streifen (2) am unteren Ende des Pfostens über das Mantelblattmaterial (1) hinausragen und Verbindungsmittel zur Befestigung eines Rohrstumpfs bilden.
EP98901656A 1997-07-09 1998-01-26 Verfahren zur herstellung eines pfahles und mit diesem verfahren hergestellter pfahl Expired - Lifetime EP0994982B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9702655 1997-07-09
SE9702655A SE9702655D0 (sv) 1997-07-09 1997-07-09 Sätt att framställa stolpe och stolpe framställd enligt sättet
PCT/SE1998/000107 WO1999002779A1 (en) 1997-07-09 1998-01-26 Method for manufacturing a post and post manufactured according to said method

Publications (2)

Publication Number Publication Date
EP0994982A1 EP0994982A1 (de) 2000-04-26
EP0994982B1 true EP0994982B1 (de) 2004-03-24

Family

ID=20407701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98901656A Expired - Lifetime EP0994982B1 (de) 1997-07-09 1998-01-26 Verfahren zur herstellung eines pfahles und mit diesem verfahren hergestellter pfahl

Country Status (6)

Country Link
EP (1) EP0994982B1 (de)
AT (1) ATE262622T1 (de)
AU (1) AU5788698A (de)
DE (1) DE69822630T2 (de)
SE (1) SE9702655D0 (de)
WO (1) WO1999002779A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008127168A1 (en) * 2007-04-13 2008-10-23 Ortic 3D Ab A yieldable pole and a method of making such pole

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPR745001A0 (en) * 2001-09-04 2001-09-27 John Holland Pty Ltd A method for reinforcing poles
SE535317C2 (sv) 2010-07-08 2012-06-26 Varmfoerzinkning Ab Eftergivlig belysningsstolpe samt sätt att åstadkomma en belysningsstolpe
FR2974136B1 (fr) * 2011-04-15 2014-03-28 Petitjean Fut de faible diametre et de forte epaisseur.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2031890A5 (de) * 1969-02-12 1970-11-20 Ehrhard Roger
US3987593A (en) * 1972-08-25 1976-10-26 Lars Svensson Posts
AU546648B2 (en) * 1980-11-20 1985-09-12 Industrial Galvanizers Corporation Pty Ltd Lighting pole
DE3380741D1 (en) * 1983-11-01 1989-11-23 Sven Runo Vilhelm Gebelius Poleshaped supporting member, and base structure for attachment of same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008127168A1 (en) * 2007-04-13 2008-10-23 Ortic 3D Ab A yieldable pole and a method of making such pole

Also Published As

Publication number Publication date
SE9702655D0 (sv) 1997-07-09
EP0994982A1 (de) 2000-04-26
WO1999002779A1 (en) 1999-01-21
DE69822630D1 (de) 2004-04-29
AU5788698A (en) 1999-02-08
DE69822630T2 (de) 2005-02-03
ATE262622T1 (de) 2004-04-15

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