EP2201176B1 - Table de finisseur - Google Patents

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Publication number
EP2201176B1
EP2201176B1 EP07818213.6A EP07818213A EP2201176B1 EP 2201176 B1 EP2201176 B1 EP 2201176B1 EP 07818213 A EP07818213 A EP 07818213A EP 2201176 B1 EP2201176 B1 EP 2201176B1
Authority
EP
European Patent Office
Prior art keywords
sectors
extendible
screed
central
sector
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.)
Not-in-force
Application number
EP07818213.6A
Other languages
German (de)
English (en)
Other versions
EP2201176A1 (fr
Inventor
Antonio Cipriani
Enio Cavallini
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.)
Marini SpA
Original Assignee
Marini SpA
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 Marini SpA filed Critical Marini SpA
Publication of EP2201176A1 publication Critical patent/EP2201176A1/fr
Application granted granted Critical
Publication of EP2201176B1 publication Critical patent/EP2201176B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • 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
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/14—Extendable screeds
    • E01C2301/16—Laterally slidable screeds

Definitions

  • the present invention refers to a screed of a paver finisher according to the main claim.
  • the paver finisher with such a screed also being part of the present invention.
  • An extendible screed generally consists of a central fixed section, which determines the basic laying width, and of at least two sections which move perpendicularly to the centre line of the machine, sliding on a guide set, integral with the central section.
  • An extendible screed generally consists of a central fixed section, which determines the basic laying width, and of at least two sections which move perpendicularly to the centre line of the machine, sliding on a guide set, integral with the central section.
  • the maximum laying width that can be achieved by an extendible screed, as described above and without the application of additional extensions, is equal to or less than twice its basic width.
  • the scope of the present invention is to avoid such disadvantages, realising an improved apparatus and machine.
  • the invention is characterised by the main claim, whose combined features allow all the problems described above to be solved.
  • the present invention applying one ahead the other two extension screeds (1c,1d) ahead of a central screed (1 a, 1 b), and behind auger means with respective extensions (Sc1,Sc2), completely eliminates the aforementioned problems and allows a compact machine to be made that is capable of extending the laying width of a road pavement up to a maximum of 2.5 times the basic width of its screed avoiding all the drawbacks of both previous solutions.
  • a paver finisher ( Fig.1 ) is a machine of known technology which always consists of two main units:
  • the overall transport width of the machine must comply with the limits allowed by the different countries, whilst the paving width must be advantageously wider to cover at least a road lane in a single pass.
  • the screed must therefore be engineered so as to adjust its width to that more conveniently required by the work specifications.
  • the extendible screeds consist of a central fixed sector, in turn consisting of two hinged sectors (B1) and (B2), connected to the tractor by two tow arms (A1) and (A2), and by two sectors (B3) and (B4) mobile in the direction of the laying width.
  • the central sectors can be located ahead of the mobile sectors ( Fig. 1 ), or behind them ( Fig. 2 ) respectively.
  • Each tow arm is rigidly connected to the central section of the screed, whilst the connection to the tractor is made through a ball joint which can be moved vertically.
  • This type of constraint gives the screed a floating movement.
  • the movement of the tractor (in the direction of the arrow) forces the screed to climb over the material with an angle of attack " ⁇ ", which is determined by the balance of the forces acting on the screed: tow force, screed weight, material resistance, material carrying capacity.
  • the extendible sectors (B3) and (B4) generally move with respect to the central section by means of hydraulic cylinders, or by other known systems.
  • the most common screeds can extend their basic width (L) up to twice (2L). Wider laying widths can be obtained by fitting individual extensions (B5, B6, B7, B8, ...) and the relevant necessary auger sectors (C5, C6, C7, C8, .).
  • the invention as substantially shown in Fig. 6 , use an opposite solution compared to the solutions of the prior art and particularly to the solution claimed in the patent US 659571 , by eliminating the disadvantages and the complexity of an intermediate moulding board and locating the extendible sectors ahead of the central fixed sector, with reference to the paving direction of progress.
  • the screed of the present invention can be applied indifferently to any paver finisher, of the known art, equipped with:
  • the preferential solution ( Fig. 6 ) provides that the augers consist of two main elements (C1) and (C2) and of two auxiliary extendible side elements (2c) and (2d), where the function of said auxiliary elements can be replaced by an alternative less advantageous solution, consisting of sectors (Sc1) and (Sc2) to be applied only when needed, according to the know art, as shown in Fig. 10 .
  • the screed (B) ( Fig. 5 ) comprises a central fixed section, with a central hinge (Ac) ( Fig. 6 ) on the centre line of the machine to constitute two sections (1 a) and (1 b), connected to the tow arms (A1) and (A2) respectively, plus two said mobile sectors (1 c) and (1 d) which can be extended in the direction perpendicular to the machine centre line, i.e. in the direction of the pavement width.
  • an actuator of the known art by means of the hinge (Ac) can make an angle between the screed bottom plates of left sections (1 a + 1c) and of right sections (1 b + 1d) so as to make linear, convex, or concave ( Fig. 6a ) pavement section profiles.
  • the mobile sectors (1c) and (1d) are located ahead of the central fixed sectors (1a) and (1b); sector (1c) is in turn located ahead of sector (1d).
  • the positions of sectors (1c) and (1d) can be interchanged, giving a totally equivalent functional solution.
  • the screed end plates (3a) and (3b) are connected to the mobile sectors (1c) and (1d) respectively.
  • the mobile sectors (1c) and (1d) each have a length about equal to that of the central sector (1 a + 1 b), of basic paving width "L", it is therefore possible to extend the overall paving width up to a value equal to or wider than 2.5 times the basic paving width "L".
  • Fig. 7 The characteristic items of a screed sector are schematically shown in Fig. 7 .
  • the material, spread by the augers in front of the screed is forced by the tow action of the tractor to flow under the screed bottom plate (Pl), the flow being made easier by the alternate vertical movement of a tamper bar (Tp) which slightly extends underneath the leading edge of the screed bottom plate.
  • Tp tamper bar
  • Some screed versions do not include the tamper bar, and the flow of the material under the screed bottom plate is simply facilitated by the inclination " ⁇ " that is maintained by the plate with reference to the laying plane.
  • Angle " ⁇ " (angle of attack) is characteristic of any screed and represents the inclination assumed by the screed plate when all forces are balanced (traction, screed weight, resistance of material in front of the screed, friction between screed plate and material, material carrying force).
  • Fig. 8 schematically shows how the sliding system of a mobile sector, with reference to the fixed sector, is preferably arranged, in this case sector (1 c) of Fig. 6 .
  • Sector (1 c) slides perpendicularly to the machine centre line, guided by a pair of supports (Sa) and (Sb), properly constrained to the support arm (4a).
  • Sector (1 d) slides as the above, being properly constrained to the support arm (4b).
  • the support arms (4a) and (4b) being rigidly connected to the side ends of the central sectors (1a) and (1b) respectively.
  • the core of the mobile screed sector ( Fig. 7 ), which includes the screed plate (PI), the tamper bar (Tp), the vibrators (Vb) and the screed plate heating equipment, is properly connected to the side walls (Wa) and (Wb) of the supporting frame (Ts).
  • Said supporting frame comprises the guide (Gm) and an anti-rotation unit (Ar), sliding on bushings within the support (Sb), with wall (Wb) sliding on bushings along the external surface of the guide (Gf).
  • the support (Sa) is connected to the support arm (4a), but it can move vertically with respect to the latter (see Fig. 9 ).
  • the support (Sb) moves vertically along with the support (Sa), but it is possible to modify its angular position with respect to it around a rotation axis, coinciding with the centre line of the guide (Gf).
  • the cylindrical guide (Gf) is rigidly connected to the support (Sa): the hydraulic cylinder (P) being rigidly connected to said guide (Gf) and with the centre line of said cylinder (P) coinciding with the centre line of said guide (Gf).
  • the mobile guide (Gm) operated by the cylinder (P), slides on bushings inside the guide (Gf) and along its centre line.
  • the section view A-A is shown in Fig. 9 .
  • the mobile screed sectors are not aligned crosswise with the central fixed screed sector, therefore it is necessary to adjust their vertical position independently so as to bring the trailed edges (Ua), (Ub), (Uc) of all screed bottom plates (Pl) to lean upon the same plane, as shown in Fig. 9 .
  • the support (Sa) can move vertically along guides (Gv) with respect to the support arm (4a), the vertical movement being operated through a screw/nut-screw coupling by the actuator (Rc), or by other known systems with the same function.
  • the coupling of the tow arms (A1) and (A2) with the central screed sector is generally made as schematically shown in Fig. 9 .
  • a pin (Pn) on each side allows the inclination of the whole screed to be changed with respect to the tow arms (A1) and (A2) and to keep it locked in position by means of the turnbuckles (Tr) (one on each side).
  • the support (Sb) can rotate around the centre line of the guide (Gf), dragging in the rotation the lower part of the relevant extendible sector.
  • the adjustment is carried out by the screw adjuster (Rg) and by known locking devices (e.g.: bolts) to keep the position.
  • known locking devices e.g.: bolts
  • mouldboards (Rc) and (Rl) have been provided in order to limit the thickness of the material fed to the central screed sectors (1 a) and (1 b) and to the most backward mobile screed sector (1d).
  • the vertical displacement of the mouldboard (Rc) is operated by hydraulic cylinders, or by other known devices (not shown).
  • the horizontal guide (Go) is fixed to the mouldboard (Rc); the side mouldboard (Rl) can slide within said guide (Go); said mouldboard (Rl) being moved by the mobile sector (1d) in a direction perpendicular to the machine centre line; on the end plate (3b) of said sector (1d) a constraint is provided which does not hinder the reciprocal movements of the mouldboard (Rl) and the end plate (3b).
  • the vertical movements of the mouldboards (Rc) and (Rl) are managed by an automatic control system of the thickness of the material being supplied by the augers to the screed sectors (1a), (1b) and (1d).
  • the invention previously schematically shown in Fig. 6 , solves the problem in a very advantageous way compared to the prior solutions.
  • the cross beam (5) supporting the auger set (C1) and (C2), is connected to the tractor in such a way as to be moved in a vertical direction.
  • Two guides (Gc) are fixed to the cross beam (5); within said guides the support arms (2a) and (2b), of the auxiliary auger sectors (2c) and (2d) respectively, can slide in a direction perpendicular to the machine centre line; said auxiliary auger sectors (2c) and (2d) being located just behind the main augers (C1) and (C2) in the direction of the paving work progress.
  • the support arms (2a) and (2b) are independently operated by hydraulic cylinders, or by other known systems.
  • the solution allows the auxiliary auger sets to move vertically along with the main augers, whilst the cross movements of the support arms (2a) and (2b) are operated in synchronisation with the movements of the relevant screed mobile sectors whenever they are extended more than a preset value (about 800 mm), or return below said value in the closing phase.
  • Fig. 12 compares a solution similar to that of the invention, but with evident disadvantages:
  • a screed for a paver finisher ( Fig. 6 ) of the type comprising sectors (1 c) and (1d), independently extendible and retractable, substantially sliding on guides connected to the support arms (4a) and (4b) respectively, in turn solid with the central screed fixed sectors (1 a) and (1 b) respectively.
  • Said extendible sectors (1 c) and (1 d) being located one behind the other and ahead of the central fixed screed sectors, in the direction of the paving work progress.
  • Said extendible sectors (1 c) and (1 d) therefore being able to have a length similar to that of the whole central sector (1 a + 1 b), having a basic laying width "L".
  • Said solution being suitable for obtaining a maximum laying width of at least 2.5 times the basic laying width "L”.
  • Said screed ( Fig. 6 ) consisting of:
  • a screed as above, where said extendible sectors (1 c), (1 d) are connected to the support arms (4a) e (4b) respectively, which are part of the central section, by means of height adjusting devices (Rc), (Gv) Fig. 9 .; said height adjustment being necessary to obtain the co-planarity of the trailed edges (Uc), (Ud) of the screed bottom plates of the extendible sectors (1c), (1d) respectively with the relevant trailed edges of the bottom plates (Ua) and (Ub) of the central sectors (1 a) and (1 b) respectively.
  • each extendible sector is equipped with devices (Sb), (Rg) ( Fig. 9 ) for the fine adjustment of the relevant angle of attack, with respect to the angle of attack " ⁇ ", assumed by the central section.
  • Said mouldboard (Rl) being mobile in a vertical direction, solid with the first mouldboard (Rc), and crosswise along with the movement of the extendible section (1d); said mouldboard (Rl) being connected to the end plate (3b).
  • Said auxiliary augers (2c) and (2d) being operated together with the main auger sectors (C1) and (C2) respectively and said auxiliary augers being extendible crosswise, in a direction perpendicular to the machine centre line, with movements controlled by the extension, or closing of the relevant mobile screed sectors (1c) and (1d).
  • auxiliary augers (2c) and (2d) being supported by arms (2a) and (2b) respectively, sliding within guides (Gc) by means of known devices, where said guides (Gc) are fixed to the crossbeam (5), supporting the main augers (C1) and (C2).

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)

Claims (2)

  1. Poutre lisseuse pour un finisseur de type comprenant des secteurs (1c, 1d), indépendamment rétractables et extensibles, substantiellement coulissant sur des guides reliés à des bras de support (4a, 4b) respectivement, à leur tour fixés aux secteurs fixes centraux (1a et 1b, respectivement), lesdits secteurs extensibles (1 c, 1 d) étant situés l'un derrière l'autre et devant les secteurs fixes centraux, dans la direction de la progression du travail de pavage, lesdits secteurs extensibles (1c, 1d) étant capables d'avoir une longueur similaire à celle du secteur central entier (1a + 1 b) ayant une largeur de pose de base "L", ladite solution étant apte à obtenir une largeur de pose maximale d'au moins 2,5 fois la largeur de pose de base "L",
    où ladite poutre lisseuse est en outre composée de:
    - une section fixe centrale d'une certaine longueur de base "L", avec une charnière centrale (Ac), parallèle à la ligne médiane de la machine, constituant deux unités (1a et 1b) articulées pour donner un profil concave ou convexe ou linéaire de la section transversale de la couche de revêtement; lesdites unités (1a et 1 b) étant équipées, à leurs extrémités externes, avec les bras de support (4a, 4b) des secteurs extensibles (1c,1d, respectivement) ; lesdits secteurs extensibles (1c,1d) étant reliés à des bras de traction (A1, A2, respectivement) ;
    - un premier secteur extensible (1 d), avec une longueur environ égale à celle du secteur central entier (1a + 1b) et situé devant ce dernier dans la direction de la progression du travail de pavage;
    - un deuxième secteur extensible (1 c), avec une longueur environ égale à celle du secteur central entier (1 a + 1 b) et situé devant le premier secteur extensible (1 d) dans la direction de la progression du travail de pavage;
    - lesdits secteurs extensibles (1 c, 1 d) étant indépendamment mobiles par rapport au secteur central (1a + 1b) dans la direction de la largeur de pose et dans une direction verticale;
    - lesdites poutres lisseuses comprenant une plaque de base (Pl), un dameur verticalement mobile (Tp) qui s'étend légèrement au-dessous du bord d'attaque de la plaque de base (Pl), des vibreurs (Vb) et un équipement de chauffage pour la plaque de la poutre lisseuse,
    - lesdits premier et deuxième secteurs extensibles sont liés à des parois latérales (Wa; Wb) d'un cadre de support (Ts);
    - ledit cadre de support comprenant un premier guide (Gm) et une unité anti-rotation (Ar), coulissant sur des bagues dans un support (Sb), avec une paroi (Wb) coulissant sur des bagues le long de la surface externe d'un deuxième guide (Gf);
    et où lesdits secteurs extensibles (1c, 1d) sont liés aux bras de support (4a, 4b, respectivement), qui font partie de la section centrale, au moyen de dispositifs de réglage de la hauteur (Rc, Gv), ledit réglage de la hauteur étant pourvu pour obtenir la coplanarité des bords traînés (Uc, Ud) des plaques inférieures des secteurs extensibles (1 c, 1 d, respectivement) avec les bords traînés des plaques inférieures (Ua, Ub) des secteurs centraux (1a, 1b, respectivement);
    - chaque secteur extensible est équipé avec des dispositifs (Sb, Rg) pour le réglage de précision de l'angle d'attaque relatif par rapport à l'angle d'attaque "ω" adopté par la section centrale;
    - lesdits secteurs extensibles (1c; 1d) portent, à leurs extrémités externes, des plaques terminales (3a, 3b, respectivement) pour conserver le matériel apporté par les tarières;
    lesdites plaques terminales étant en contact avec la surface à paver et flottant librement dans une direction verticale;
    et où la hauteur de la couche de matériel apportée par les tarières vers la section centrale est ajustée par une cloison (Rc) ; ladite cloison (Rc) coulisse dans une direction verticale dans des guides (Gv) fixés à des bras de traction (A1 A2) et est déplacée par des cylindres hydrauliques, ou par des dispositifs fonctionnels équivalents ; ladite cloison (Rc) est équipée avec un guide horizontal (Go), pour supporter une ultérieure cloison (Rl) qui limite la hauteur de la couche de matériel apportée par les tarières au secteur extensible plus en arrière (1 d), dans la direction de la progression du travail de pavage, ladite cloison (Rl) étant mobile dans une direction verticale, fixée à la première cloison (Rc), et transversalement au mouvement de la section extensible (1 d) ; ladite cloison (Rl) étant reliée à la plaque terminale (3b);
    lesdites tarières étant deux secteurs principaux de tarières (C1 C2) et un ensemble de tarières auxiliaires (2c, 2d) ; lesdites tarières auxiliaires étant situées derrière les tarières principales et supportées par des bras (2a, 2b, respectivement), coulissant dans des guides (Gc) fixés à la traverse (5) ; lesdites tarières auxiliaires (2c, 2d) fonctionnant avec les secteurs des tarières principales (C1, C2) et étant mobiles verticalement avec ces derniers ; lesdites tarières auxiliaires étant indépendamment extensibles de façon tranversale, au moyen de dispositifs connus, suivant une direction perpendiculaire à la ligne médiane de la machine, et étant coordonnées avec le mouvement du secteur extensible relatif, afin de permettre une distribution uniforme du matériel sur l'entière largeur de travail de la poutre lisseuse jusqu'aux plaques terminales (3a, 3b), reliées aux extrémités externes des secteurs extensibles (1 c, 1 d) de ladite poutre lisseuse, dont la partie centrale est articulée au centre (Ac) pour constituer deux sections (1a; 1b), qui peuvent être mutuellement inclinées pour obtenir un profil de section transversale de la couche de revêtement linéaire, convexe ou concave.
  2. Finisseur équipé avec une poutre lisseuse conformément à la revendication précédente.
EP07818213.6A 2007-09-18 2007-09-18 Table de finisseur Not-in-force EP2201176B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/008111 WO2009036779A1 (fr) 2007-09-18 2007-09-18 Table de finisseur

Publications (2)

Publication Number Publication Date
EP2201176A1 EP2201176A1 (fr) 2010-06-30
EP2201176B1 true EP2201176B1 (fr) 2013-08-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07818213.6A Not-in-force EP2201176B1 (fr) 2007-09-18 2007-09-18 Table de finisseur

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EP (1) EP2201176B1 (fr)
WO (1) WO2009036779A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4144916A1 (fr) 2021-09-03 2023-03-08 Joseph Vögele AG Agencement de poutre lisseuse pour une finisseuse de route

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11105048B2 (en) 2018-10-17 2021-08-31 Caterpillar Paving Products Inc. Screed dual carriage extender tube orientation
US11255057B2 (en) 2020-03-07 2022-02-22 Brian Gallagher Screed assembly for road paving machines, and a method for repaving road surfaces
CN113152223B (zh) * 2021-04-26 2023-02-28 湖北金五环体育设施有限公司 一种塑料跑道摊铺装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US659571A (en) 1899-05-26 1900-10-09 John L Lockwood Jr Cigarette-roller.
US4749304A (en) * 1986-09-15 1988-06-07 White Consolidated Industries, Inc. Variable width material distribution system for asphalt pavers and the like
JP2656210B2 (ja) 1993-10-08 1997-09-24 新キャタピラー三菱株式会社 舗装機械等のスクリード装置
JP3383908B2 (ja) 1999-06-15 2003-03-10 住友建機製造株式会社 アスファルトフィニッシャ等の道路舗設車両のスクリード装置
US7651295B2 (en) 2003-03-07 2010-01-26 Volvo Construction Equipment Ab Extension screed for a paving vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4144916A1 (fr) 2021-09-03 2023-03-08 Joseph Vögele AG Agencement de poutre lisseuse pour une finisseuse de route

Also Published As

Publication number Publication date
WO2009036779A1 (fr) 2009-03-26
EP2201176A1 (fr) 2010-06-30

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