EP1026324A2 - Vibratory finishing machine - Google Patents

Vibratory finishing machine Download PDF

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Publication number
EP1026324A2
EP1026324A2 EP00101625A EP00101625A EP1026324A2 EP 1026324 A2 EP1026324 A2 EP 1026324A2 EP 00101625 A EP00101625 A EP 00101625A EP 00101625 A EP00101625 A EP 00101625A EP 1026324 A2 EP1026324 A2 EP 1026324A2
Authority
EP
European Patent Office
Prior art keywords
machine
screw feeders
bitumen aggregate
bitumen
transmission unit
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.)
Granted
Application number
EP00101625A
Other languages
German (de)
French (fr)
Other versions
EP1026324B1 (en
EP1026324A3 (en
Inventor
Romolo Bitelli
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.)
Caterpillar Paving Products Inc
Original Assignee
Bitelli 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 Bitelli SpA filed Critical Bitelli SpA
Publication of EP1026324A2 publication Critical patent/EP1026324A2/en
Publication of EP1026324A3 publication Critical patent/EP1026324A3/en
Application granted granted Critical
Publication of EP1026324B1 publication Critical patent/EP1026324B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E01C19/22—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 consolidating or finishing laid-down unset materials
    • E01C19/30—Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
    • E01C19/34—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight
    • E01C19/40—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight adapted to impart a smooth finish to the paving, e.g. tamping or vibrating finishers
    • E01C19/405—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight adapted to impart a smooth finish to the paving, e.g. tamping or vibrating finishers with spreading-out, levelling or smoothing means other than the tamping or vibrating means for compacting or smoothing, e.g. with screws for spreading-out the previously dumped material, with non-vibratory lengthwise reciprocated smoothing beam

Definitions

  • vibratory finishing machines which basically consist of a frame shaped to provide a drivers cab and which houses the means of traction of the machine itself.
  • the frame also holds a hopper with mobile walls containing the hot bitumen aggregate that, when retrieved by a conveyor belt, is deposited on the surface being asphalted.
  • bitumen aggregate is then uniformly spread onto the surface being asphalted by the action of a pair of screw feeders standing side by side and set crossways to the machine's direction of travel and rotated by a transmission unit that connects them next to the machine's centreline.
  • bitumen aggregate While the bitumen aggregate is still hot it is uniformly spread over the road surface being asphalted and then compacted by the action of a device called a "vibrating compactor" set behind the screw feeders with respect to the machine's direction of travel.
  • the vibratory compactor comprises a plowshare consisting of a plate having a primarily longitudinal direction, set perpendicular to the surface being asphalted and crossways to the machine's direction of travel.
  • the plowshare spreads the bitumen aggregate distributed by the screw feeders thereby preparing it for compacting by a beam, which is also set crossways to the machine's direction of travel and made to oscillate vertically by a device connected to it.
  • the main inconvenience of the machine described above is that the flow of bitumen aggregate transported by the conveyor belt engulfs the space between the screw feeders and the plowshare creating a build up of bitumen aggregate against the transmission unit which leads to an uneven distribution of the bitumen aggregate on the road course, thereby requiring additional finishing by hand.
  • bitumen aggregate tends to cool and thereby consolidates, hampering the uniform distribution of bitumen aggregate on the surface being asphalted. This makes it necessary to remove the consolidated bitumen aggregate, which has to be carried out periodically by an operator who has to follow the machine throughout the work cycle.
  • the main scope of the finding is to produce a machine that allows to deposit the bitumen coarse in an even, uniform manner over the whole surface being treated.
  • a scope is to produce a machine that eliminates the build-up of hot bitumen aggregate and its consequent cooling.
  • Another scope is to produce a machine that does not require the intervention of operators during the work cycle.
  • a self-propelled vibratory finishing machine for asphalting road surfaces that in accordance with the main claim comprises a frame, housing a means of traction, which is shaped to provide a drivers cab and that supports:
  • An advantage of the finding is that it allows a uniform distribution of the bitumen aggregate deposited on the surface being asphalted.
  • Another advantage of the finding is that it allows a vibratory finishing machine to be produced that does not require periodical servicing by operators to guarantee an even deposit of bitumen aggregate.
  • It essentially comprises a frame 2, which is shaped to provide a drivers cab 3 and that houses the machine's means of traction.
  • the frame 2 also supports storage means consisting of a mobile walled hopper 4 containing the hot bitumen aggregate B that is retrieved by a conveyor belt, not illustrated, to be deposited on the surface being asphalted 5.
  • the deposited aggregate B is then uniformly distributed onto the surface being asphalted 5 by the action of a pair of screw feeders 6 standing side by side, set to the rear of the machine 1 and crossways to the direction of travel 7 of the machine 1, moved by a transmission unit 8, illustrated in detail in fig.'s 2 and 3, that connects them next to the machine's centreline 1.
  • bitumen aggregate B is then compacted by a device, called a vibratory compactor generally indicated by 9 in fig. 1, set behind the screw feeders 6, with respect to the direction of travel 7 of the machine 1.
  • the vibratory compactor 9 comprises a plowshare consisting of a plate 10 having a primarily longitudinal direction set perpendicular to the surface 5 being asphalted and crossways to the direction of travel 7 of the machine 1.
  • the plowshare spreads the bitumen aggregate B distributed by the screw feeders 6 and prepares it for compacting by an oscillating beam 11, also mounted crossways to the direction of travel 7 of the machine 1, made to oscillate vertically by a device connected to it and not illustrated.
  • the finding prescribes that the transmission unit 8 is connected, next to the screw feeders 6, to a flow divider device 12 having a basically prismatic form and symmetrical around an axis 17, as illustrated in fig. 4, having surfaces 13 and 14, 15 and 16 converging towards the symmetrical axis 17 so that a top cutting edge 18 and bottom cutting edge 19 are created.
  • a plate 21, connected to the flow divider device 12, having a series of through holes 22 enables it, by a means of fixing such as screws or similar not illustrated, to be applied to the transmission unit 8.
  • bitumen aggregate B that is transported by the conveyor belt 20, as can be seen in detail in fig. 3, falls by gravity towards the surface being asphalted 5, and encounters the top culling edge 18 and surfaces 13 and 14 which prevent any build ups and aid the flow of bitumen aggregate B towards the screw feeders 6.
  • bitumen aggregate B around the transmission unit 6 caused by the machine's travel 1 is prevented in a similar manner by the action of surfaces 15, 16 and the bottom cutting edge 19.
  • bitumen aggregate never encounters blind zones where it may settle, cool and consolidate, since it is continuously directed in motion, by the combined action of gravity and the machine's travel 1, towards the screw feeders 6, which by rotating spread the bitumen aggregate B sideways.
  • the flow divider device may take on any form, having curved surfaces and more, so long as the shape and position are such that the deposited bitumen aggregate is kept mixed.
  • any quantity of these flow divider devices may be mounted on the machine as their size may differ.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Road Repair (AREA)
  • Working-Up Tar And Pitch (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The finding produces a self-propelled vibratory finishing machine (1) for asphalting road surfaces (5) comprising a frame (2) which supports storage means (4) and distribution of the bitumen (B) to be deposited on the surfaces (5) comprising a pair of screw feeders (6) moved by a transmission unit (8) and pressing means (9) the deposited bitumen aggregate (B) set behind the screw feeders (6). Connected to the transmission unit and next to the screw feeders (6) there is a flow divider device (12) having surfaces (13, 14, 15, 16) symmetrically shaped to create at least one cutting edge (18) suited to aid the flow of bitumen (B) towards the screw feeders (6)

Description

This finding concerns a vibratory finishing machine especially suited for uniformly depositing bitumen aggregate on surfaces to be asphalted.
It is known that in road asphalting work common use is made of self-propelled machines called vibratory finishing machines which basically consist of a frame shaped to provide a drivers cab and which houses the means of traction of the machine itself.
What's more the frame also holds a hopper with mobile walls containing the hot bitumen aggregate that, when retrieved by a conveyor belt, is deposited on the surface being asphalted.
The bitumen aggregate is then uniformly spread onto the surface being asphalted by the action of a pair of screw feeders standing side by side and set crossways to the machine's direction of travel and rotated by a transmission unit that connects them next to the machine's centreline.
While the bitumen aggregate is still hot it is uniformly spread over the road surface being asphalted and then compacted by the action of a device called a "vibrating compactor" set behind the screw feeders with respect to the machine's direction of travel.
The vibratory compactor comprises a plowshare consisting of a plate having a primarily longitudinal direction, set perpendicular to the surface being asphalted and crossways to the machine's direction of travel.
In particular the plowshare spreads the bitumen aggregate distributed by the screw feeders thereby preparing it for compacting by a beam, which is also set crossways to the machine's direction of travel and made to oscillate vertically by a device connected to it.
The main inconvenience of the machine described above is that the flow of bitumen aggregate transported by the conveyor belt engulfs the space between the screw feeders and the plowshare creating a build up of bitumen aggregate against the transmission unit which leads to an uneven distribution of the bitumen aggregate on the road course, thereby requiring additional finishing by hand.
This build up is also aggravated by the machine's forward travel that pushes the bitumen aggregate against the plate.
Another inconvenience is that the build up of bitumen aggregate tends to cool and thereby consolidates, hampering the uniform distribution of bitumen aggregate on the surface being asphalted. This makes it necessary to remove the consolidated bitumen aggregate, which has to be carried out periodically by an operator who has to follow the machine throughout the work cycle.
Last but not least, an inconvenience is caused by the risk the operator runs while removing the consolidated bitumen aggregate, since he has to remove the bitumen aggregate with a spade in close proximity to the rotating screw feeders.
This finding intends to remedy the aforementioned inconveniences.
The main scope of the finding is to produce a machine that allows to deposit the bitumen coarse in an even, uniform manner over the whole surface being treated.
Last but not least, a scope is to produce a machine that eliminates the build-up of hot bitumen aggregate and its consequent cooling.
Another scope is to produce a machine that does not require the intervention of operators during the work cycle.
The aforesaid scopes are achieved by a self-propelled vibratory finishing machine for asphalting road surfaces that in accordance with the main claim comprises a frame, housing a means of traction, which is shaped to provide a drivers cab and that supports:
  • storage means and distribution of the bitumen aggregate ready to be deposited on said surfaces comprising a pair of screw feeders working side by side mounted crossways to the direction of travel of said machine, moved by a transmission unit that connects them next to the machine's centreline;
  • pressing means the deposited bitumen aggregate set behind said screw feeders and crossways to the direction of travel of said machine;
that is characterised in that it has, connected to said transmission unit and next to said screw feeders, a flow divider device basically consisting of faces symmetrically shaped around a vertical axis, converging towards said axis to create at least one cutting edge suited to aid the flow of bitumen aggregate towards said screw feeders.
An advantage of the finding is that it allows a uniform distribution of the bitumen aggregate deposited on the surface being asphalted.
Another advantage of the finding is that it allows a vibratory finishing machine to be produced that does not require periodical servicing by operators to guarantee an even deposit of bitumen aggregate.
The aforesaid scopes and advantages shall be better explained during the description of a preferred form of execution of the finding given as a guideline but not a limitation and illustrated in the attached diagrams, where:
  • fig. 1 illustrates the vibratory finishing machine under this finding;
  • fig. 2 illustrates a front view of part of the vibratory finishing machine in fig. 1;
  • fig. 3 illustrates an isometric view of a detail of the machine in fig. 1;
  • fig. 4 illustrates an isometric view of a detail of the machine in fig. 1;
  • fig. 5 illustrates a side view of part of the machine in fig. 1.
The vibratory finishing machine under this finding is illustrated in fig. 1, where it is indicated as a whole by 1.
It essentially comprises a frame 2, which is shaped to provide a drivers cab 3 and that houses the machine's means of traction.
The frame 2 also supports storage means consisting of a mobile walled hopper 4 containing the hot bitumen aggregate B that is retrieved by a conveyor belt, not illustrated, to be deposited on the surface being asphalted 5.
The deposited aggregate B is then uniformly distributed onto the surface being asphalted 5 by the action of a pair of screw feeders 6 standing side by side, set to the rear of the machine 1 and crossways to the direction of travel 7 of the machine 1, moved by a transmission unit 8, illustrated in detail in fig.'s 2 and 3, that connects them next to the machine's centreline 1.
The bitumen aggregate B is then compacted by a device, called a vibratory compactor generally indicated by 9 in fig. 1, set behind the screw feeders 6, with respect to the direction of travel 7 of the machine 1.
The vibratory compactor 9 comprises a plowshare consisting of a plate 10 having a primarily longitudinal direction set perpendicular to the surface 5 being asphalted and crossways to the direction of travel 7 of the machine 1.
The plowshare spreads the bitumen aggregate B distributed by the screw feeders 6 and prepares it for compacting by an oscillating beam 11, also mounted crossways to the direction of travel 7 of the machine 1, made to oscillate vertically by a device connected to it and not illustrated.
The finding prescribes that the transmission unit 8 is connected, next to the screw feeders 6, to a flow divider device 12 having a basically prismatic form and symmetrical around an axis 17, as illustrated in fig. 4, having surfaces 13 and 14, 15 and 16 converging towards the symmetrical axis 17 so that a top cutting edge 18 and bottom cutting edge 19 are created.
A plate 21, connected to the flow divider device 12, having a series of through holes 22 enables it, by a means of fixing such as screws or similar not illustrated, to be applied to the transmission unit 8.
The bitumen aggregate B that is transported by the conveyor belt 20, as can be seen in detail in fig. 3, falls by gravity towards the surface being asphalted 5, and encounters the top culling edge 18 and surfaces 13 and 14 which prevent any build ups and aid the flow of bitumen aggregate B towards the screw feeders 6.
The build up of bitumen aggregate B around the transmission unit 6 caused by the machine's travel 1 is prevented in a similar manner by the action of surfaces 15, 16 and the bottom cutting edge 19.
In this way the flow of bitumen aggregate never encounters blind zones where it may settle, cool and consolidate, since it is continuously directed in motion, by the combined action of gravity and the machine's travel 1, towards the screw feeders 6, which by rotating spread the bitumen aggregate B sideways.
It is clear that the flow divider device may take on any form, having curved surfaces and more, so long as the shape and position are such that the deposited bitumen aggregate is kept mixed.
In a similar way any quantity of these flow divider devices may be mounted on the machine as their size may differ.

Claims (4)

  1. Vibratory finishing machine (1) self-propelled for asphalting road surfaces (5) comprising a frame (2), housing a means of traction, which is shaped to provide a drivers cab (3) and that supports:
    storage means (4) and distribution of the bitumen aggregate (B) to be deposited on said surfaces (5) comprising a pair of screw feeders (6) standing side by side and crossways set to the direction of travel (7) of said machine (1), moved by a transmission unit (8) that connects them next to the machine's centreline;
    pressing means (9) the bitumen aggregate deposited (B) set behind said screw feeders (6) and crossways to the direction of travel (7) of said machine (1);
    characterised in that, connected to said transmission unit and next to said screw feeders (6) it has a flow divider device (12) having surfaces (13, 14, 15, 16) symmetrically shaped around a vertical axis (17), converging towards said axis (17) to create at least one cutting edge (18) in the opposite direction to the flow of bitumen suited to aid the flow of bitumen aggregate (B) towards said screw feeders (6).
  2. Vibratory finishing machine (1) according to claim 1), characterised in that said surfaces (13, 14, 15, 16) converge to create two cutting edges, one on top (18) and one at the bottom (19).
  3. Vibratory finishing machine (1) according to claim 2) characterised in that said flow divider device (12) is a solid piece having a basically prismatic shape with bases of a rhombic form.
  4. Vibratory finishing machine (1) according to claim 1), characterised in that said flow divider device (12) is connected to a plate (21) suited to allow the fixing of said flow divider (12) to said transmission unit (8).
EP00101625A 1999-02-01 2000-01-28 Vibratory finishing machine Expired - Lifetime EP1026324B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI990006U 1999-02-01
IT1999VI000006U IT248739Y1 (en) 1999-02-01 1999-02-01 VIBRIN FINISHING MACHINE.

Publications (3)

Publication Number Publication Date
EP1026324A2 true EP1026324A2 (en) 2000-08-09
EP1026324A3 EP1026324A3 (en) 2001-12-12
EP1026324B1 EP1026324B1 (en) 2005-11-09

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ID=11426887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00101625A Expired - Lifetime EP1026324B1 (en) 1999-02-01 2000-01-28 Vibratory finishing machine

Country Status (4)

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EP (1) EP1026324B1 (en)
AT (1) ATE309415T1 (en)
DE (1) DE60023767T2 (en)
IT (1) IT248739Y1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013177915A1 (en) * 2012-05-29 2013-12-05 湖南三一智能控制设备有限公司 Screed compaction beam, screed, and paver
WO2015058515A1 (en) * 2013-10-21 2015-04-30 戴纳派克（中国）压实摊铺设备有限公司 Anti-segregation auger distributor and paver

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110700039B (en) * 2019-11-14 2024-09-24 中交一公局集团有限公司 Broken stone surface chemical slurry treatment device and method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5232305A (en) * 1991-05-15 1993-08-03 Caterpillar Paving Products Inc. Paving material distribution system
US5531542A (en) * 1994-11-14 1996-07-02 Ingersoll-Rand Company Dual auger/conveyor drive for a paver

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5232305A (en) * 1991-05-15 1993-08-03 Caterpillar Paving Products Inc. Paving material distribution system
US5531542A (en) * 1994-11-14 1996-07-02 Ingersoll-Rand Company Dual auger/conveyor drive for a paver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013177915A1 (en) * 2012-05-29 2013-12-05 湖南三一智能控制设备有限公司 Screed compaction beam, screed, and paver
WO2015058515A1 (en) * 2013-10-21 2015-04-30 戴纳派克（中国）压实摊铺设备有限公司 Anti-segregation auger distributor and paver
EP3061868A4 (en) * 2013-10-21 2018-04-04 Dynapac (China) Compaction & Paving Equipment Co. Ltd. Anti-segregation auger distributor and paver

Also Published As

Publication number Publication date
IT248739Y1 (en) 2003-02-12
DE60023767T2 (en) 2006-07-27
ITVI990006U1 (en) 2000-08-01
DE60023767D1 (en) 2005-12-15
EP1026324B1 (en) 2005-11-09
EP1026324A3 (en) 2001-12-12
ATE309415T1 (en) 2005-11-15

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