FR2775700A1 - Procedure and device for use with gravel and asphalt spreaders to optimize their working together - Google Patents

Abstract

A fixed distance (D) is maintained between a gravel spreader (3) and an asphalt or bonding compound spreader (1). The gravel spreader is downstream from the asphalt distributor and its distribution gates are opened at a time interval after the spreader starts to ensure the gravel falls in the correct area. The device for carrying out the procedure includes an emitter/receiver in each vehicle for the bilateral transmission of data and orders to maintain the correct distance and operation.

Description

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  OPERATING PROCESS APPLIED SIMULTANEOUSLY TO A SPREADER

  OF BINDER AND TO A GRAVILLONNEUR AND DEVICE FOR ITS IMPLEMENTATION

DESCRIPTION

  The present invention relates to an operating method applied simultaneously to a binder spreader equipped with a ramp provided with a

  plurality of diffusers and a gravel spreader equipped with a diffuser-

  gravel distributor provided with a plurality of distribution valves and operating downstream of said distributor. The invention also relates to a device for implementing said method. The known methods and devices of the genre in question involve an operator who visually controls the distance between

  both vehicles and which gives the order to open and close

  ture of the gravel distribution valves as a function of the surface covered by the binder spreader as they progress

on the road.

  Such means generate significant evaluation errors which have the main consequences:

  - precision of the surfaces treated between the spreader and the gravel -

  neur operator function; - loss of material; - a difficulty in managing the surface to be treated according to the load of the

gravel spreader.

  The invention therefore aims to achieve a method and a device for its implementation which eliminate these various drawbacks by performing, automatically, the operations: - of controlling the distance between the two vehicles and their respective speeds; - slaving of the control of the graveller's valves to that of the diffusers of the ramp, deferred, according to the distance traveled by the vehicles; - controlling the load of the gravel spreader in relation to the surface of the binder, spread over the road, to be covered;

  - slaving of the dosages to the forward speed of the vehicles.

  -2- The characteristics and advantages of the invention will appear

  more clearly on reading the following detailed description of at least

  a preferred embodiment thereof given by way of non-limiting example

  tative and shown in the accompanying drawing (single figure).

  The assembly shown essentially comprises: - a binder spreader (1) equipped with a ramp (2) provided with a plurality of diffusers; - a gravel spreader (3) equipped with a diffuser-distributor (4) provided with a

  plurality of distribution valves and operating downstream of said diffuser.

  The control method according to the invention consists, automatically

  that: - to keep the gravel spreader (3) at a well-defined distance (D) from the spreader (1); to actuate, out of phase, the distribution valves of said gravel spreader, at the end of a distance, traveled by said gravel spreader, equal to that (D) existing between the ramp (2) of said spreader, during operation, and

  the diffuser-distributor (4) of said gravel spreader.

  Said method consists, in addition, in slaving: - the surface of the binder spread over the road (5) to the volume of gravel available in the gravel spreader; - the opening and closing of the number of graveller valves at the opening and closing of the number of diffusers of the spreader;

  - the flow rate of the graveller's valves at its forward speed.

  Said method also consists in transmitting, automatically, from the gravel spreader to the spreader, data relating to the spreader,

  including its identification and its payload.

  The device for implementing the method according to the invention comprises, installed on each vehicle, for the bi-lateral transmission of the data and commands necessary for the operation of the assembly,

a transmitter / receiver.

  Each receiver / transmitter is connected to electronic means, of the programmable logic controller type or the like, capable of automatically controlling the

functioning of the whole.

  Each electronic means is provided with a display means, in particular the

  display screen type, and a means of entering data, in particular

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keyboard type.

  Each vehicle has a unit for counting the distances traveled,

  linked to the corresponding electronic means.

  The distance (D) corresponds to the projection on the roadway of the length existing between the spreading ramp (2) and the diffuser-distributor

gravel (4).

  The assembly shown also includes: - a supply of gravel (6) of the tipping body type;

  - a binder reserve (7) of the tank type.

  The direction of travel of the vehicles is indicated by the arrows (F).

  Of course, the invention is not limited to the embodiment described and shown for which other variants can be provided, in particular in: - the types of transmitters / receivers used; - associated electronic means; - the type of means of counting the distances traveled by the vehicles;

  without thereby departing from the scope of the invention.

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Claims (8)

  1- Operating method applied simultaneously to a binder spreader (1) equipped with a ramp (2) provided with a plurality of diffusers and to a gravel spreader (3) equipped with a diffuser-distributor (4) provided a plurality of distribution valves and operating downstream of said diffuser; characterized in that it consists, automatically, in maintaining the gravel spreader (3) at a well-defined distance (D) from the spreader (1), and in actuating, out of phase, the distribution valves of said spreader, end of a distance, traveled by said gravel spreader, equal to that (D) existing between the ramp (2) of said spreader, during operation, and   the diffuser-distributor (4) of said gravel spreader.   2- A method according to claim 1, characterized in that it consists, in addition, in controlling the surface of the binder spread on the roadway (5) to   volume of gravel available in the gravel spreader.   3- A method according to claim 1 or claim 2, characterized in that it consists, in addition, in slaving the opening and closing of the number of valves of the gravel spreader to the opening and closing of the number diffusers from the diffuser.   4- Method according to any one of claims 1 to 3, characterized   in that it consists, in addition, in controlling the flow rate of the valves   of the gravel spreader at its forward speed.   - Method according to claim 1 or claim 2, characterized in that it consists in automatically transmitting the gravel spreader   to the distributor, data relating to the gravel spreader, in particular his identification cation and its payload.   6- Device for implementing the method according to any one   of the preceding claims, characterized in that it comprises, installed   on each vehicle, for bi-lateral transmission of data and   commands necessary for the operation of the assembly, a transmitter / receiver.   7- Device according to claim 6, characterized in that each transmitter / receiver is connected to electronic means, of the programmable automatic controller type or the like, capable of automatically controlling the operation from the whole.   8- Device according to claim 7, characterized in that each electronic means is provided with a display means, in particular of the screen type   display, and a means for entering data, in particular of the keyboard type. -5-   9- Device according to any one of claims 6 to 8,   characterized in that each vehicle has a unit for counting   distances traveled electrically connected by corresponding electronic means laying.