EP0753626A1 - Vorrichtung zum Beschichten - Google Patents

Vorrichtung zum Beschichten Download PDF

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Publication number
EP0753626A1
EP0753626A1 EP96305105A EP96305105A EP0753626A1 EP 0753626 A1 EP0753626 A1 EP 0753626A1 EP 96305105 A EP96305105 A EP 96305105A EP 96305105 A EP96305105 A EP 96305105A EP 0753626 A1 EP0753626 A1 EP 0753626A1
Authority
EP
European Patent Office
Prior art keywords
laying box
substrate
screed
flap
assembly according
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Withdrawn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
EP96305105A
Other languages
English (en)
French (fr)
Inventor
David Nicholas Kilner
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.)
Colas SA
Original Assignee
Colas 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 Colas Ltd filed Critical Colas Ltd
Publication of EP0753626A1 publication Critical patent/EP0753626A1/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Withdrawn legal-status Critical Current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
    • 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
    • E01C19/488—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 with rollers for consolidating or finishing combined with tamping, vibrating, pressing or smoothing consolidation or finishing means
    • 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
    • E01C19/12—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 distributing granular or liquid materials
    • E01C19/18—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect
    • E01C19/185—Devices for distributing road-metals mixed with binders, e.g. cement, bitumen, without consolidating or ironing effect for both depositing and spreading-out or striking-off the deposited mixture
    • 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
    • E01C19/46—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 preparing and placing the materials, e.g. slurry seals
    • 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
    • E01C2301/40—Working platform or walkway

Definitions

  • This invention relates to surfacing apparatus, and in particular to laying boxes for use in road-surfacing vehicles, of the type in which a road-surfacing material is applied, by trailing application, under a screed that defines the surfacing thickness.
  • asphalts have been applied at a thickness of between 30 and 50 mm. They can be made to give good texture depth, essential for most UK roads, by rolling in chippings while the surface is hot. A flat, prepared substrate is required, to ensure a flat, finished surface for the applied asphalt. Some reprofiling will result from the surface preparation as well as the mat thickness tolerance. Material thickness and level are dependent upon the forces applied to the floating screed and the wheel/track base of the paver and towing arm length.
  • surfacing products have been commercially applied, again using a rigid screed, at a thickness of between 10 and 25 mm. These materials contain aggregate grading which will give acceptable texture depths for UK needs, without the need to roll chippings into the surface. However, in some cases, the thickness of the applied material approaches the maximum particle size of the material. Surface deformation is then caused, by the screed dragging and scraping the surface. A flat, prepared substrate and screed clearance control are most important. Some reprofiling results from the surface preparation and some rut filling by the material. These products are applied using the same techniques as described above.
  • An extension of the slurry/microasphalt system uses a technique whereby the road surface is first reprofiled using the slurry mix, by using a rigid screed in order to fill all the deformities and ruts.
  • a top coat of slurry/microasphalt can then be applied using a rigid or flexible screed.
  • Slurry/microasphalt screeds are supported by the substrate being coated via skids, whereas asphalt pavers employ a system whereby the screed floats on the material being applied.
  • a laying box assembly suitable for use with a road-surfacing vehicle, by means of which surfacing material can be applied by trailing application, to a road or other substrate comprises a laying box having mounted at its leading edge at least one flap for detecting the substrate profile; a screed; means for controlling the thickness of the material applied to the substrate; and means for transmitting movement of the at least one flap caused by unevenness in the substrate to the thickness control means.
  • a control system whereby material is applied in such a way that the surface flatness is maintained at an acceptable level. Further, when a plurality of independently-mounted flaps are used, which is preferred, the finished profile takes into account substrate deformities. Material usage is thus minimised, and the maximum material thickness is always greater than the maximum aggregate particle size used.
  • leading edge of the screed or laying box is that edge which, in use, passes over the substrate first, and the trailing edge is that edge parallel to the leading edge.
  • the screed is movable independently of the laying box, and is mounted on elongate members that run on the substrate and which are positioned at least on either side of the screed.
  • movement of any flap caused by unevenness in the substrate is transmitted to the screed mounting associated with that flap, causing the screed to rise at that place.
  • a two-part screed can be used, hinged along its central axis, transverse to its leading and trailing edges.
  • an elongate member supports the screed along its hinge also.
  • a plurality of screeds may be used, each mounted at its sides on elongate members, or a multi-hinged screed with each hinge being supported on an elongate member.
  • the screed is immovably fixed to the laying box, and the thickness of material applied to the substrate is controlled by varying the height of the laying box above the substrate.
  • the laying box is mounted, at least on either of its sides, on elongate members that run on the substrate.
  • movement of any flap is then transmitted to the associated laying box mounting, causing the laying box to rise at that place.
  • the laying box is hinged along its central axis to allow for, or provide, road camber,and is mounted on a further elongate member along that axis.
  • the laying box is pivoted at its leading edge about an axis which is at a fixed height above the substrate.
  • the thickness of material applied is controlled by raising and lowering the trailing edge of the laying box, according to substrate profile.
  • the laying box is not pivoted about a fixed axis, but instead its sides can be raised and lowered to substantially the same extent at their leading and trailing edges.
  • two sets of detector flaps are provided, eg two pairs, between the outer elongate members.
  • the outer detector flaps control the sides of the screed plate or laying box
  • the detector flaps each side of the central elongate member control the movement at its centre.
  • the detector flaps may be of equal length, but this may be changed if, for instance, a more pronounced crowning of the surface is required.
  • At least one detector flap should be provided for each plate or supported part.
  • Figure 1 is a side view of a mobile blending and mixing machine.
  • Figures 2A and 2B are top and side views, respectively, of a laying box embodying the present invention.
  • Figure 4 is a schematic view of the mechanism of Figure 3, in greater detail.
  • Figure 5 is a side view of a laying box according to a second embodiment of the present invention.
  • Figure 6 is a side view of the laying box of Figure 5, in raised position.
  • Figures 7A to 7D are schematic views representing the movement of a laying box in the second and the third embodiments of the present invention.
  • a screed plate, strike-off plate or roller screed (subject of EP-A-0693591) is supported, independently of a laying box, on skids or skis (3,4).
  • the skids ride on the substrate to be spread with asphalt.
  • the length of the two outside skids (3) is such to ensure acceptable stability (e.g. 2.5 m).
  • the centre skid (4) controls the position of a hinge provided between two essentially coaxial rollers, whose respective orientation can be used to provide road camber.
  • Figure 3 shows from left to right, an hydraulic cylinder (7) whose body is for attachment to the screed plate/roller assembly, and whose rod is for attachment to the laying box structure via an adjusting screw through the hollow cylinder rod. These attachments are shown in Figure 4.
  • a manifold block (8) Attached to the cylinder body, and ported to it, is a manifold block (8) containing a flow control valve (not shown) which is capable of controlling the cylinder speed.
  • valve (9) In operation the following will occur, assuming that valve (9) is in its neutral position.
  • a valve dead band of 1 to 2 mm is sufficient to prevent hunting, and approximately 4 mm movement either side of the dead band is sufficient to move the cylinder up or down.
  • a further hydraulic flow control valve contained in the circuit controls the rise time of this device. Acceptable ridability can be achieved with undulations of about 2 mm per metre.
  • the distance between the screed plate and the flap is, for example, about 1 m.
  • the forward speed may be, for example, about 1 ⁇ 2 m/sec.
  • a rise time of 1 mm/sec is acceptable.
  • a screed plate (21) and a roller (22) are immovably fixed to a side plate (23) of a laying box.
  • the height (x) of the side plate (23) above the substrate (24) controls the thickness of material screeded by the screed plate and/or the roller.
  • Lifting and lowering the side plate of the laying box in a direction parallel to the surface of the substrate is achieved by parallel links (25) and (26), which attach a skid (27) to the side plate, and which are of equal centre pivot distance.
  • the motion of those parallel links, and consequently of the side plate, is controlled by a double acting hydraulic cylinder (28) and a double acting hydraulic control valve (29).
  • Detector flaps (30), together with a return spring (31), monitor the road surface profile between the skids upon which the laying box is mounted; details of the detector flaps and skids are given in relation to Figures 2A and 2B above.
  • the mechanical feedback linkage consisting of items (14) to (18) of Figures 3 and 4 is not necessary, as the detector flaps, pivot, screed plate and roller move together with the side plate to the same distance above the substrate. Consequently, when the detector flaps are disengaged from the raised substrate they return to the equilibrium state, taking the remainder of the system with them. Instead, a simpler system can be utilised, in which the flap bears directly on the valve stylus via a radus arm (32). The radus arm moves away from the double acting valve stylus when the flap engages a raised portion of substrate between the skids. This prevents the valve stylus becoming overloaded.
  • the return spring (31) together with a stop (33) will protect the valve if the flap is allowed to fall beyond the accommodation of the valve, eg. when returning to its equilibrium position.
  • Figures 7A to 7D show the different kinds of movement achieved in the second and third embodiments of the present invention.
  • the base of a laying box hinged along the line X-X is shown in an unraised position.
  • unevenness of the substrate causes side Y of the laying box to rise parallel to the surface of the substrate and without influencing the position of the screed at its centre (along X-X) or its opposite side.
  • a laying box is again hinged along the line X-X, and pivoted from its leading edge along Z-Z. The raising of one side of the laying box, for instance at Y, influences the position of the laying box both at its centre and its opposite side, leading to an inefficient use of surfacing material.
  • the detector flaps are positioned some way ahead of the front of the laying box.
  • the detector flaps are typically 1-5 m, preferably some 2.5 m, ahead of the strike plate, if a minimum thickness of around 10 mm is to be maintained over the 10 mm rise.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
EP96305105A 1995-07-12 1996-07-11 Vorrichtung zum Beschichten Withdrawn EP0753626A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9514228A GB9514228D0 (en) 1995-07-12 1995-07-12 Surfacing apparatus
GB9514228 1995-07-12

Publications (1)

Publication Number Publication Date
EP0753626A1 true EP0753626A1 (de) 1997-01-15

Family

ID=10777530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96305105A Withdrawn EP0753626A1 (de) 1995-07-12 1996-07-11 Vorrichtung zum Beschichten

Country Status (2)

Country Link
EP (1) EP0753626A1 (de)
GB (1) GB9514228D0 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006006179A1 (en) * 2004-07-12 2006-01-19 Chandresh Kunwar Road paving apparatus & process thereof
US7544012B2 (en) 2005-12-09 2009-06-09 Lura Enterprises, Inc. Power roller screed with multiple screed rollers
US9879389B1 (en) 2014-10-30 2018-01-30 Lura Enterprises, Inc. Powered roller screed with adjustable handle for wet screed attachment

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115162109B (zh) * 2022-08-02 2023-04-18 郑州航空工业管理学院 一种基于公路建设的沥青铺设装置
CN117488626B (zh) * 2023-12-25 2024-04-26 中交建筑集团东南建设有限公司 一种基于湿陷性黄土路基填筑的混砂翻拌装置及施工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2447760A1 (de) * 1974-10-07 1976-04-15 Renner Co Strassendecken-fertiger mit belagstaerkenund ebenheits-regelung
DE2643789A1 (de) * 1976-09-29 1978-03-30 Reinhard Wirtgen Maschine zum aufbringen von strassenbelaegen
DE8906157U1 (de) * 1988-11-22 1989-07-06 Beck, Hermann, 7067 Buoch Einrichtung zum Verlegen von insbesondere bituminösen Straßenbelägen
DE9417991U1 (de) * 1994-11-10 1995-02-02 Kirchhoff-Heine Strassenbaugesellschaft mbH & Co. KG, 88085 Langenargen Vorrichtung zum Verhindern von Materialablagerungen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2447760A1 (de) * 1974-10-07 1976-04-15 Renner Co Strassendecken-fertiger mit belagstaerkenund ebenheits-regelung
DE2643789A1 (de) * 1976-09-29 1978-03-30 Reinhard Wirtgen Maschine zum aufbringen von strassenbelaegen
DE8906157U1 (de) * 1988-11-22 1989-07-06 Beck, Hermann, 7067 Buoch Einrichtung zum Verlegen von insbesondere bituminösen Straßenbelägen
DE9417991U1 (de) * 1994-11-10 1995-02-02 Kirchhoff-Heine Strassenbaugesellschaft mbH & Co. KG, 88085 Langenargen Vorrichtung zum Verhindern von Materialablagerungen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006006179A1 (en) * 2004-07-12 2006-01-19 Chandresh Kunwar Road paving apparatus & process thereof
US7544012B2 (en) 2005-12-09 2009-06-09 Lura Enterprises, Inc. Power roller screed with multiple screed rollers
US7704012B2 (en) 2005-12-09 2010-04-27 Lura Enterprises, Inc. Power roller screed with multiple screed rollers
US7959374B2 (en) 2005-12-09 2011-06-14 Lura Enterprises, Inc. Power roller screed with circular pour attachment
US9879389B1 (en) 2014-10-30 2018-01-30 Lura Enterprises, Inc. Powered roller screed with adjustable handle for wet screed attachment

Also Published As

Publication number Publication date
GB9514228D0 (en) 1995-09-13

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