EP1637654A2 - Splitt-Streuvorrichtung mit konstanter Dosierung - Google Patents

Splitt-Streuvorrichtung mit konstanter Dosierung Download PDF

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Publication number
EP1637654A2
EP1637654A2 EP05291913A EP05291913A EP1637654A2 EP 1637654 A2 EP1637654 A2 EP 1637654A2 EP 05291913 A EP05291913 A EP 05291913A EP 05291913 A EP05291913 A EP 05291913A EP 1637654 A2 EP1637654 A2 EP 1637654A2
Authority
EP
European Patent Office
Prior art keywords
bucket
chippings
hatches
adjusting
roller
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Withdrawn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
EP05291913A
Other languages
English (en)
French (fr)
Other versions
EP1637654A3 (de
Inventor
Guy Marconnet
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.)
Famaro SA
Original Assignee
Famaro SA
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
Priority claimed from FR0409970A external-priority patent/FR2875515B1/fr
Application filed by Famaro SA filed Critical Famaro SA
Publication of EP1637654A2 publication Critical patent/EP1637654A2/de
Publication of EP1637654A3 publication Critical patent/EP1637654A3/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Withdrawn legal-status Critical Current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
    • E01C19/12—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
    • E01C19/20—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders
    • E01C19/201—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders with driven loosening, discharging or spreading parts, e.g. power-driven, drive derived from road-wheels
    • E01C19/202—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders with driven loosening, discharging or spreading parts, e.g. power-driven, drive derived from road-wheels solely rotating, e.g. discharging and spreading drums
    • E01C19/2025—Throwers with substantially horizontal axis, e.g. drums or brushes rotated to fling the material at the surface
    • 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
    • E01C19/20—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders
    • E01C2019/2055—Details not otherwise provided for
    • E01C2019/207—Feeding the distribution means
    • E01C2019/2095—Feeding the distribution means by tipping

Definitions

  • the invention relates to a gravel spreading device with a constant dosing at the rear of a tipper body of a dump truck used for spreading gravel on the surface of a soil to be coated such as the surface. from a road or highway.
  • Gravel spreaders which can be attached to the rear of a tipper body of a truck and which mainly comprise a frame fixed on an outlet portion of the bucket instead of the rear door. , a set of spreading width adjustment hatches aligned in the transverse direction of the bucket ensuring a selective passage of chippings, a roller for driving and distribution of chippings and means for distributing the chippings entrained by the roller on the surface of a soil.
  • the distribution means generally comprise a dispenser flap disposed below the roller which distributes the chippings and possibly a counter-flap to improve the transverse distribution and to reduce the speed of falling chippings.
  • the dispensing bib is generally flat and has corridors to widen the gravelled area.
  • the spreading width adjustment hatches are generally in the form of cylindrical sectors and are articulated on the same axis.
  • the hatches can be ordered individually or in groups for their opening and closing with pneumatic cylinders that allow the adjustment of the spreading width.
  • the roller of the chip is rotated by a motor, for example a hydraulic motor whose speed varies according to the speed of advance of the truck.
  • a bridge on which is placed the control station of the chip is generally mounted articulated on the frame and maintained in a horizontal arrangement using hydraulic cylinders.
  • An adjustment bar limits the trapping stroke and adjusts the thickness of the gravel web at the exit of the hatches and therefore the gravel dosing.
  • the dosing bar is not used as a stop limiting the opening of the hatches but is placed downstream and limits the passage of chippings.
  • the roller is driven at a constant speed, for example by an electric geared motor whose power is supplied by an electric source carried by the dump truck, for example a drums.
  • the gateway connected to the frame of the chip is fixed.
  • the transverse distribution of the chippings is generally satisfactorily carried out, the gravel dosing, that is to say the volume of gravel per unit of road surface having a variation in the direction transverse defined by a transverse coefficient of variation (CVT) generally low and lower than a standard NFP 98-160 fixed for the realization of road coatings (generally less than 10%).
  • CVT transverse coefficient of variation
  • the variation in the quantity of gravel poured per square meter of the soil being covered is defined by a longitudinal coefficient of variation (CVL) which is equal to the variation in the quantity of gravel poured per square meter of soil relative to the quantity nominal spilled.
  • CVL longitudinal coefficient of variation
  • the longitudinal variation of the dosage of chippings spread on the ground during the displacement of the dump truck can be of the order of 1 l / m 2 for a nominal dosage of 7 l / m 2 .
  • An increase in the speed of the carrier on the ground of the site is translated by a decrease in the gravel dosage and an increase in the angle of the bucket during the discharge of a load of gravel results in an increase in the gravel dosing .
  • An object of the invention is therefore to provide a device for spreading chippings at the rear of a dump body of a dump truck comprising a frame, means for fixing the frame on the bucket, at the rear a gravel passage section extending above the bottom of the bucket along the width of the bucket, a set of traps for adjusting the spreading width of the gravel at the rear of the passage section, distributed in the transverse direction of the bucket along the entire length of the passage section, means for controlling the hatches for closing and opening with a fixed displacement amplitude, a transverse direction chipping drive roller mounted rotatably to the rear of the adjustment hatches, a motor means for rotating the roller and means for distributing gravel entrained by the roller on the surface of a soil on which the dump truck moves, which allows to ensure a precise and perfectly constant dosing of the gravel regardless of the speed of the dump truck and the angle of the bucket.
  • FIGS. 1A, 1B and 2 a device for spreading chippings or gritters is generally designated by reference numeral 1.
  • the gravel 1 is attached to the rear end of a tipper 3 pivotally mounted on the subframe 4 of a dump truck 4 ', about a horizontal axis 5a and direction transverse to the subframe 4 of the dump truck and the dump 3.
  • the bucket 3 can be tilted into a discharge position as shown in Figure 1, by tilting means such as cylinders 5b.
  • the gravel spreading device 1 comprises a frame 2 which is mounted at the rear of the bucket 3, in a position similar to that of a rear door of the bucket, for example by means of removable fastening devices.
  • 6 constituted by hooks which are fixed on attachment shafts at the upper end of uprights 3b of the bucket 3 perpendicular to the bottom 3a of the bucket on which the load of gravel 7 rests.
  • the frame 2 of the chipboard carries a wall 7 for holding chippings, a bridge 8 on which is placed the driving station of the chip, the set of spreading width adjustment doors 10 and a metering bar 11 by the intermediate of a transverse axis 9, means for moving the traps 10 and the metering bar 11, the roller 12 for driving the chippings and its drive motor 13 as well as the distribution means 14 and 15 of the current of chippings 16 on the ground 17 of the road site on which the dump truck is moving.
  • the frame 2 comprises two uprights 2a, 2b each placed at one end of the chipboard in the transverse direction between which are placed one after the other, in the transverse direction, the adjustment hatches 10 (for example sixteen hatches) and the driving roller gravel 12 whose ends are rotatably mounted each in a post 2a, 2b.
  • the adjustment hatches 10 for example sixteen hatches
  • the driving roller gravel 12 whose ends are rotatably mounted each in a post 2a, 2b.
  • the wall 7 for retaining the chippings 16 is constituted by a sheet fastened along an upper edge on a transverse directional profile of the frame 2, extending along the entire width of the bucket in the transverse direction and towards the bottom 3a of the bucket, to a lower end edge 7a at a distance from the bottom 3a of the bucket.
  • the wall 7 is inclined forwards, from top to bottom, with respect to the frame 2 perpendicular to the bottom 3a of the bucket, so that the chippings 16 bear against the retaining wall 7 when the bucket tilts (as shown in Figure 1) are separated from the frame 2 of the chip.
  • Between the lower end edge 7a of the retaining wall 7 and the bottom 3a of the bucket is provided a passage section 18 gravel 16 dumped by the bucket, during its tilting.
  • a corridor 20 for guiding and decompressing the chippings 16 extends between the passage section 18 of the chippings 16 and the hatches 10 for adjusting the spreading width, in the longitudinal direction and along the entire width of the bucket 3 in the transverse direction.
  • the passage 20 is formed between the bottom 3a of the bucket 3 and a sheet wall 19 substantially parallel to the bottom 3a of the bucket integral with the end edge 7a of the retaining wall 7 at one of its longitudinal ends and the frame 2 of the chipboard at its second longitudinal end near the adjustment doors 10.
  • the wall 19 can be made in one piece with the retaining wall 7 by folding the sheet along a transverse direction line.
  • the sheet constituting the wall 19 is also folded along a transverse line in the direction opposite to the bottom 3a of the bucket, so that the corridor 20 for guiding and decompressing the chippings 16 is diverging in its exit portion directed towards adjusting hatches 10.
  • the chippings 16 contained in the bucket 3 and which come into contact with the wall 7 during tilting of the bucket are compressed one by one against the others under the effect of the weight of the load, so that their flow through the passage section 18 can be difficult and irregular. Inside the corridor 20, the chippings are decompressed and their flow rate is regulated, so that the gravel stream reaching the adjustment traps 10 is regular and at substantially constant pressure.
  • the length of the passage 20 between the passage section 18 of the chippings and the end of the corridor in the vicinity of the traps 10 is generally between 100 mm and 200 mm. Preferably, this length is close to 150 mm.
  • the divergence angle of the corridor may be of the order of 5 ° to 20 °.
  • the hatches 10 in the form of cylindrical sectors, whose convex portion is directed towards the guide and decompression corridor 20, are pivotally mounted on the transverse direction axis 9 integral with the frame 2 of the chip, each via a support and pivot arm 21 integral with the hatch having the shape of an open loop or a C.
  • Each hatch 10 comprises an actuating cylinder 22 whose body is hingedly connected about an axis horizontal direction transverse to the frame 2 of the chip and the rod, also articulated about a transverse horizontal axis, to the hatch 10.
  • the cylinders 22 are controlled by a pneumatic circuit, either individually, so as to selectively open or close a certain number of hatches, or as a whole to achieve the simultaneous opening or closing of the
  • the hatches 10 extend in the transverse direction along the entire length of the passageway 20 and the passage opening 18 and allow, by selective opening, to adjust the spreading width of the chippings reaching the traps by the corridor 20.
  • an adjustable stop 23 associated with the hatches 10 makes it possible to limit the displacement of the hatches 10 at the opening, so that in the open position, as shown in FIG. 1, the hatches limit the height out of the corridor 20 above the bottom of the bucket to a determined value, in particular according to the granulometry of the chippings 16 contained in the bucket.
  • the adjustable stop designated as a whole by the reference 23 comprises, for each of the hatches 10, an abutment pad 24 secured to a rear surface of the arm 21 of the hatch and, at the rear of the abutment pad 24, a finger stop 32 secured to an operating cross member 31 which can be moved transversely by a displacement rod 25 whose rounded end 25a constitutes an operating handle for an operator placed at the driving position on the platform 8.
  • Each of the abutment pads 24 has a plurality of successive bearing areas in the transverse direction, offset relative to each other in the longitudinal direction and directed rearward, in a staircase-like structure.
  • the operator can place, at the beginning of a spreading operation of gravel of a determined particle size, the stop fingers 32 of each of the traps in a position in the transverse direction such that the fingers 32 are in contact with each other. -vis a support zone of the abutment pads 24 traps allowing an opening of the hatches adapted to the grain size granules.
  • the hatches 10 of the trap set therefore have the same opening position which is a function of the particle size of the gravel.
  • the metering bar 11 in the form of a transverse directional bar extending across the entire length of the set of adjustment doors 10 which can be moved by pivoting about the axis 9 by means of at least one jack 27 whose body is hingedly connected about a transverse direction horizontal axis to the frame 2 of the chip and the stem, also articulated about a horizontal axis of transverse direction, to a support member integral with the pivot arm 26 itself integral with the metering bar 11.
  • the cylinder or cylinders 27 for moving the metering bar 11 are controlled completely independently of the actuators 22 for moving the traps.
  • the metering bar 11 is displaced, during its pivoting, in a direction substantially perpendicular to the bottom 3a of the bucket 3, that is to say perpendicular to the flow of gravel 16 from the bucket and limited by the traps 10. It is thus possible to very precisely adjust the thickness of the gravel stream reaching the drive roller 12.
  • the dosing bar 11 disposed at the rear of the hatches 10, that is to say downstream of the traps in the direction of flow of the chippings, is generally placed above an area of the roller 12 on which the chippings 16 flow.
  • the roller 12 is driven via a belt or a chain, preferably by a motor 13 independent of the motor ensuring the displacement of the truck.
  • the motor 13 may be an electric gear motor or an electro-hydraulic unit that can be powered by a battery.
  • the motor 13 may also be a hydraulic motor powered and controlled so as to ensure the fixed speed drive roller 12 for driving and distribution of chippings.
  • the speed of rotation of the roller 12 is completely independent of the speed of displacement of the dump truck on the site so as to ensure a distribution and a homogeneous and constant distribution of chippings.
  • the distributing bib 14 which is fixedly mounted on the support of the chip integral with the bucket preferably comprises corridors for enlarging the gravelled area.
  • the gravel stream 16 dumped by the flap 14 is received by a counter-flap which makes it possible to break the fall of the chippings in order to improve the transverse distribution.
  • a layer 28 of gravel is obtained with a perfectly constant dosage.
  • the grading dosing of the layer 28 is independent of the angle of inclination of the bucket, during the discharge of gravel and the speed of advancement of the dump truck on site.
  • the set of jacks 22 for opening and closing the hatches 10 is controlled by a first control unit 29 and the adjustment jack or cylinders of the metering bar 11 is (are) controlled by a second unit of order 30.
  • the hatches 10 make it possible to perform a pre-dosing of the chippings, which depends in particular on the particle size of the chippings.
  • the metering bar 11, completely independent of the hatches, allows to obtain a precise metering and perfectly adapted to the speed of displacement of the dump truck.
  • control unit 30 of the displacement cylinder (s) of the metering bar 11 makes it possible to control the position of the metering bar as a function of the forward speed of the dump truck.
  • the speed of the dump truck is transmitted to the control unit 30 which determines and controls the position of the metering bar 11 as a function of the measured speed.
  • a preliminary calibration was carried out to establish curves relating to each type of chippings used making it possible, for a required metering, to associate a position of the metering bar with a speed of displacement of the dump truck.
  • the method of the invention has made it possible to perform grinding operations under conditions such that the transverse coefficient of variation (CVT) is substantially equal to half of the maximum of the accepted norm (generally 10%).
  • CVT transverse coefficient of variation
  • a gravel with a difference in dosage during operation substantially equal a quarter of the maximum imposed by the standard relating to the production of road coatings.
  • a spreading device 1 is fixed on a hopper 34 integral with the subframe 4 of a truck 4 ' .
  • the hopper 34 is in the form of an upside-down pyramid-shaped reservoir delimited by peripheral walls 40, 41 inclined to allow the discharge of gravel 16 received in the hopper 34 through a lower opening or passage section 18. extending over the width of the hopper 34 in the transverse direction, that is to say perpendicular to the plane of FIG. 3.
  • a front wall 40 facing upwards and backwards, corresponds to the bottom of a bucket in the tilted position.
  • the hopper 34 comprises a duct 44 extending from the passage section 18 towards the rear of the truck 4 'and opening on the side opposite the section 18 through an outlet 46.
  • the conduit 44 extends in the extension of the wall 40.
  • the spreading device 1 is similar to that of FIGS. 1A, 1B and 2, and the identical elements will not be described in detail.
  • the spreading device 1 comprises a frame 2 fixed by any appropriate known fastening means, for example by means of bolts, on the outlet 46, so that a decompression corridor 20 of the spreading device 1 extends the conduit 44. downstream of the passage section 18.
  • the corridor 20 has a height less than that of the duct 44.
  • the spreading device 1 comprises a wall 48 delimiting in the duct 44 a transition section 50 between the duct 44 and the passageway 20, having a gradually decreasing height of the section. passage 18 to the corridor 20.
  • the passageway 20 is defined between two walls of the spreading device 1.
  • the passageway 20 is defined between a wall of the conduit 44 and a wall of the spreading device 1.
  • the spreading device 1 is devoid of a control gateway. In a variant, the spreading device 1 comprises a control gateway.
  • the spreading device 1 comprises traps 10, a metering bar 11, a stop 23 arranged on the frame and similarly controlled to those of the embodiment of FIGS. 1A, 1B and 2, so that the operation is identical and that the same benefits are obtained.
  • the discharge of the chippings 16 depends on the inclination of the wall 40 and its conduit 44 relative to the horizontal, that is to say the slope of the ground 17, since the hopper 34 is fixed on the truck 4 '. An increase in this inclination tends to increase the gravel dosage.
  • the spreading device 1 thus allows a more precise and constant dosing of the gravel whatever the speed of the truck 4 'and the inclination of the hopper 34 relative to the horizontal.
  • the stop 23 is adjustable by an operator located behind the truck 4 '.
  • the hatches 10 are in the closed position, so that the chippings 16 do not pour onto the ground 17.
  • the guide and decompression of the chippings can take any form to obtain an area in which the chippings are at constant pressure at the outlet of the bucket or hopper.
  • it can be defined in particular between the bottom of the bucket and a wall generally parallel to the bottom of the bucket.
  • the guide and decompression corridor may be formed in the form of a lock attached to the frame with or without a chute retention wall.
  • the height of the corridor in a direction perpendicular to the direction of flow of the chippings may be arbitrary, but preferably this height which is substantially equal to the maximum opening height of the Adjustment hatches are at most equal to the length of the corridor in the direction of gravel circulation.
  • the stop device ensuring the limitation of the race of the hatches may have a shape different from that which has been described; it comprises in all cases one or more stop members extending in the transverse direction, so as to achieve by a single adjustment operation the limitation of the opening stroke of all the adjustment doors of the chip.
  • the gravel distribution roller In order to achieve a perfectly constant dosing of chippings, whatever the speed of circulation of the dump truck or the truck, it is preferable to drive the gravel distribution roller with a motor powered and controlled by so that its speed is perfectly independent of the speed of the displacement of the dump truck or the truck. It is possible, in some cases, to use a fixed speed roller, that is to say a roller rotating at the same speed regardless of the conditions of implementation of the gravel.
  • the invention applies to any gravel spreading device attached to the back of the bucket of a dump truck or the back of a hopper of a truck.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Road Repair (AREA)
EP05291913A 2004-09-21 2005-09-16 Splitt-Streuvorrichtung mit konstanter Dosierung Withdrawn EP1637654A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0409970A FR2875515B1 (fr) 2004-09-21 2004-09-21 Dispositif d'epandage de gravillons avec un dosage constant a l'arriere d'une benne basculante d'un camion
FR0506593A FR2875516B1 (fr) 2004-09-21 2005-06-28 Dispositif d'epandage de gravillons avec un dosage constant, a l'arriere d'une tremie ou d'une benne basculante d'un camion

Publications (2)

Publication Number Publication Date
EP1637654A2 true EP1637654A2 (de) 2006-03-22
EP1637654A3 EP1637654A3 (de) 2006-11-02

Family

ID=35431556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05291913A Withdrawn EP1637654A3 (de) 2004-09-21 2005-09-16 Splitt-Streuvorrichtung mit konstanter Dosierung

Country Status (2)

Country Link
EP (1) EP1637654A3 (de)
FR (1) FR2875516B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110712581A (zh) * 2019-11-13 2020-01-21 烟台恒驰挂车有限公司 一种散状物料摊铺装置及包含它的运输车
CN112277759A (zh) * 2020-09-25 2021-01-29 河北拓熙机械科技有限公司 具有布料功能的自卸车

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2829513A1 (fr) 2001-09-12 2003-03-14 Famaro Dispositif d'epandage de gravillons a l'arriere d'une benne basculante d'un camion

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647131B1 (fr) * 1989-05-22 1992-02-14 Secmair Dispositif gravillonneur
FR2850402B1 (fr) * 2003-01-23 2010-02-19 Mauguin Procede et dispositif destines a rendre uniforme l'ecoulement des gravillons d'un gravillonneur a rouleau distributeur

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2829513A1 (fr) 2001-09-12 2003-03-14 Famaro Dispositif d'epandage de gravillons a l'arriere d'une benne basculante d'un camion

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110712581A (zh) * 2019-11-13 2020-01-21 烟台恒驰挂车有限公司 一种散状物料摊铺装置及包含它的运输车
CN112277759A (zh) * 2020-09-25 2021-01-29 河北拓熙机械科技有限公司 具有布料功能的自卸车
CN112277759B (zh) * 2020-09-25 2022-04-26 河北拓熙机械科技有限公司 具有布料功能的自卸车

Also Published As

Publication number Publication date
FR2875516A1 (fr) 2006-03-24
FR2875516B1 (fr) 2007-09-21
EP1637654A3 (de) 2006-11-02

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