Mobile unit for manufacturing and / or repairing a road surface and kit provided with same

Abstract

The invention relates to a mobile unit (1) for making and / or repairing road surfacing, characterized in that the mechanism (11) for actuation of the aggregate flow regulator blade (9) comprises a driven lever (12), on which the blade (9) is fixed and a mechanism (16) reducing the displacement of the driven lever (12) from the displacement of a drive device (15) of a rotation axis (140), such that the rotation of the second rotation axis (140) causes the driven lever (12) to rotate relative to the first rotation axis (120) in order to vary the aggregate passage gap between the blade (9) and the rotating aggregate discharge cylinder (10).

Description

[0001] The invention relates to a mobile unit for making and / or repairing a road surface and a kit provided with the same.

[0002] This mobile unit may be a bi-spreader type of equipment intended to be installed on a road carrier, for example by being mounted on a rolling chassis or similar, this chassis itself being an automobile or also being able to be towed.

[0003] Document FR-A-2 671 567 relates to a machine for spreading gravel and binder, having a gravel dosing blade, mounted in rotation under hatches above a rotating gravel discharge cylinder.

[0004] Document FR-A-2 525 125 concerns a gravel spreading machine, comprising a rotating cylinder 2 for discharging gravel resting on the ground, and a valve 4 for dosing the gravel.

[0005] The aim of the invention is to obtain a unit for spreading small-sized aggregates (gravel or sand), in particular those with a grain size of 1 to 3 mm.

[0006] One of the difficulties is the precise dosage of the quantity of aggregates spread with this small particle size.

[0007] However, spreading too much aggregate in relation to the desired quantity causes wastage of aggregate, which is detrimental from both an ecological and economic point of view.

[0008] Furthermore, too little aggregate spread compared to the desired quantity does not allow the road surface to be repaired properly.

[0009] An objective of the invention is to obtain a mobile unit for making and / or repairing a road surface, as well as a kit equipped with it, which solves the problem mentioned above in order to be able to precisely control the spreading of small-sized aggregates.

[0010] For this purpose, a first object of the invention is a mobile unit for making and / or repairing a road surface according to claim 1.

[0011] Thanks to the invention, the mobile unit allows an ultra-thin layer of aggregates to be spread due to the size of the aggregates and in a controllable manner in the desired quantity to extend the service life of the roadway. From an ecological point of view, the amount of energy required for spreading is very low, a small quantity of aggregates has to be prepared and transported to the site, and few machines are involved. The dosage of the aggregates is done by controlling the gap between the aggregate flow regulating blade and the rotating cylinder for discharging the aggregates towards the ground. This dosage is finely controlled by the displacement reduction mechanism of the driven lever, allowing the aggregate flow regulating blade to be moved more finely relative to the rotating cylinder for discharging the aggregates towards the ground.It can be used in particular to carry out road maintenance and regenerate road surfaces on a roadway by spreading aggregates.

[0012] Claims 2 to 12 relate to embodiments of the mobile unit for making and / or repairing a road surface.

[0013] A second object of the invention is a kit for making and / or repairing road surfaces according to claim 13.

[0014] Claim 14 relates to an embodiment of the kit for making and / or repairing road surfaces.

[0015] The invention will be better understood upon reading the description which follows, given solely as a non-limiting example with reference to the figures below in the attached drawings.

[0016] There figure 1 schematically represents in side view a mobile unit for making and / or repairing a road surface according to one embodiment of the invention.

[0017] THE figures 2 et 3 schematically represent in top view aggregate and binder distribution assemblies mobile unit for making and / or repairing a road surface according to embodiments of the invention.

[0018] There figure 4 schematically represents in a right-hand view a part of a mobile unit for making and / or repairing a road surface according to an embodiment of the invention.

[0019] THE figures 5 And 7 schematically represent in left view a part of a mobile unit for making and / or repairing a road surface according to embodiments of the invention.

[0020] THE figures 6 , 8 And 9schematically represent in perspective a part of a mobile unit for making and / or repairing a road surface according to embodiments of the invention.

[0021] To figures 1 à 9 , the unit 1 for repairing a roadway comprises a chassis 2, on which are mounted a container 3 for storing aggregates (which may comprise a bucket 30 or hopper 30 for aggregates) and a tank 4 for storing binder, which may be a binder tank (the binder may be an emulsion, or bitumen, or a synthetic binder. The aggregates may be gravel, or sand or other. The chassis 2 has a front side 21 and a rear side 22.

[0022] According to an embodiment shown in the figure 1 , the unit 1 for repairing a roadway is mobile on this roadway, for example rolling using wheels 23 for rolling on the roadway, which are rotatably mounted under the chassis 2. For example, as shown in the figure 1 , the unit 1 may be part of a self-propelled carrier machine 100, for example of the truck type, making it possible to bring the repair unit 1 close to the zone Z of the roadway to be treated. The chassis 2 is intended to be moved in a forward direction from the rear to the front on the roadway. Of course, the chassis 2 could be moved in the forward direction or in the opposite direction. On the front side 21 of the chassis 2 is provided a control cabin 5 allowing the user to control the forward movement motor of the chassis 2 on the roadway, to control and steer the vehicle 100 comprising the chassis 2 as well as to control the unit 1.

[0023] In the embodiment shown in the figures, the self-propelled machine 100 is for example a machine 100 of the dual-spreader or synchronous gravel spreader type. The mobile unit 1 for making and / or repairing is used to spread a road surface composed of a layer of binder and a layer of aggregates (gravel or sand or other) on the roadway. In this case, the unit 1 comprises on the rear side 22 an assembly 7 or ramp 7 for distributing aggregates or gravel spreader 7 and an assembly 8 or ramp 8 for distributing the binder, which extend at least over a width including the rear side 22 (the width being taken in the lateral direction Y, horizontal and transverse to the longitudinal direction L going from the rear side 22 to the front side 21), this direction Y of the width going from left to right. The binder distribution assembly 8 may, for example, be located in front of the aggregate distribution assembly 7.

[0024] As represented in the figures 2, 3 , 6 And 8, the aggregate distribution assembly 7 and the binder distribution assembly 8 are configured to be able to distribute aggregates and binder over one or more selected spreading width ranges from among several prescribed width ranges P in a prescribed maximum range Lmax and for a selected time associated with each selected range, according to a localized spreading instruction. Each range P may have the same prescribed step width in the Y direction of the width, which may be between 40 cm and 10 cm, and for example equal to 20 cm. The minimum step for distribution of aggregates and binder in length may be for example between 1 cm and 20 cm, for example equal to 5 cm. Each prescribed width range P of the aggregate distribution assembly 7 is delimited by a trapdoor 700 extending in this prescribed width range P, a plurality of trapdoors being distributed in the Y direction of the width.The hatches 700 therefore occupy in total the determined total width Lmax. Each hatch 700, and this independently of the other hatches 700 of the other prescribed spreading ranges P, can be selectively moved either into an open position allowing aggregates to pass downwards in the prescribed width range P associated with this hatch 700 into a conduit 702 for passing the aggregates in the aggregate distribution assembly 7 to spread aggregates downwards according to a spreading command, or into a closed position to close in this prescribed width range P the conduit 702 for passing the aggregates in the aggregate distribution assembly 7 and not to spread any aggregates in this prescribed width range P according to a no-spreading command.The opening time of each hatch is determined as a function of the selected time and / or selected spreading length and the speed V of advance of the mobile unit 1 in the direction L of advance. Each hatch 700 may comprise a flap 701 for closing off the aggregates, which may for example be in the form of a circular cylinder sector, and movable in the conduit 702 for passing the aggregates. The closing flaps 701 are shown in transparency in the figure. figure 8 . The 700 hatches and the prescribed ranges P must be side by side along the Y direction of the width.

[0025] According to one embodiment of the invention, the hatches 700 are capable of being moved between the open position and the closed position by rotation around an axis of rotation, which is therefore common to the plurality of hatches 700 and to the plurality of prescribed ranges P.

[0026] According to one embodiment of the invention, each hatch 700 can be moved between its open position and its closed position by a jack 709. There is therefore a plurality of jacks 709 making it possible to individually move the plurality of hatches 700. Each hatch 700 comprises an arm 714, a first end portion of which is rotatably mounted around the axis of rotation of the hatch 700 and a second end portion of which is fixed to the flap 701 or secured to the flap 701 at a distance from the axis of rotation of the hatch 700. The jack 709 comprises a rod 7091 slidably mounted in a controllable manner relative to a barrel 7092 of the jack 709. The rod 7091 of the jack 709 has its end 7093 connected to the arm 714 at a point located between the axis of rotation of the hatch 700 and the shutter 701.The barrel 7092 of the cylinder 709 (for example the end 7094 of the barrel 709 of the cylinder 709, which is furthest from the end 7093 of the rod 7091) is connected by an articulation (bolting or other) to a fifth axis 7095 of rotation provided in the assembly 7.

[0027] The binder distribution assembly 8 is capable of selectively spreading binder in each prescribed width range P according to the spreading command and of selectively not spreading binder in each prescribed width range P according to the no-spreading command. According to an embodiment of the invention, each prescribed width range P of the binder distribution assembly 8 is delimited by a downward binder distribution nozzle extending in this prescribed width range P, a plurality of nozzles being distributed in the width direction Y and each being capable of being selectively opened to spread binder downward in the prescribed width range P associated with this nozzle and closed to not spread it in this prescribed width range P, and this independently of the other nozzles of the other prescribed spreading ranges P.The opening time of each nozzle is determined according to the selected time and / or selected spreading length and the forward speed V.

[0028] According to an embodiment of the invention, the aggregate distribution assembly 7 or ramp 7 comprising the hatches 700 and the binder distribution assembly 8 or ramp 8 have a fixed width (determined total width Lmax), included in the road gauge of the chassis 2 or the vehicle 100, represented by right 230 and left 240 vertical planes on either side of the median plane 34 as for example shown in figure 2 . The aggregate distribution assembly 7 or ramp 7 in this case comprises a box 710 (shown for example in figure 7 ) fixed to the chassis 2 and comprising the elements described below with reference to the figures 4 à 9 The box 710 may comprise a rotating screw 715 for supplying aggregates from an upper opening 712 for receiving aggregates from the aggregate storage container 3 to the hatches 700.

[0029] According to another embodiment of the invention, called sliding, shown in figures 1 , 2 , 3 And 9, the first aggregate distribution assembly 7 and the second binder distribution assembly 8 are deformable transversely, i.e. in width, to have a variable template during the work of the unit 1, i.e. while the chassis 2 is moved longitudinally forward on the roadway. For example, the first aggregate distribution assembly 7 comprises two parts 71, 72 for distributing aggregates towards the ground which are each movable in width, relative to the chassis 2 and are arranged one behind the other. Each of the two parts 71, 72 has a width template (determined total width Lmax) substantially equal to or less than the road template of the chassis 2, represented by right 23 and left 24 vertical planes at figure 3 . The road gauge of the chassis 2 and the dual-spreader vehicle 100 is usually equal to a standard gauge of 2.50 m, so that in the rest position of the distribution assemblies 7, 8, the vehicle can drive on the road network and be brought onto the road to be surfaced. In the example shown in figures 2 et 3 , each aggregate distribution part 71, 72 has a working width of approximately 2.40 m. Each aggregate distribution part 71, 72 has a retracted position, in which its width dimension is included in the template of the chassis 2.

[0030] Means, for example a jack, are provided for moving in both directions of the Y direction of the width each aggregate distribution part 71, 72 relative to the chassis 2. Each aggregate distribution part 71, 72 can be mounted sliding in both directions of the Y direction of the width on one (or more) rails, not shown, fixed to the chassis 2 (for example by being suspended from the rail). Each aggregate distribution part 71, 72 can respectively comprise a box 710, 720 comprising the elements described below with reference to figures 4 à 9 , each box 710, 720 being mounted to slide in both directions of the Y direction of the width relative to the chassis 2. Each box 710, 720 can be similar to the box 710 shown in the figure 7 .

[0031] Each aggregate distribution part 71, 72 is capable of being moved between the first extreme position retracted into the road gauge of the chassis 2, and a second extreme position of maximum extension towards the outside, in which it protrudes in width respectively from the right side and the left side of the chassis 2 seen from the rear, the mobile aggregate distribution part 71 being active for example in its different positions to the right of the median vertical plane 34 of the chassis 2, while the left mobile aggregate distribution part 72 is active to the left of the median plane 34 in its different positions. The mobile aggregate distribution part 71 may be provided further forward than the mobile aggregate distribution part 72, as shown in figures 1 , 2 et 3 , but it could be the other way around. Between these two extreme positions, each aggregate distribution part 71, 72 is able to occupy several intermediate positions, in which it protrudes from the right side, respectively the left side of the chassis 2. In the second extreme position of maximum outward exit of the parts 71, 72, their inner end, that is to say the left end 711 of the right part 71 and the right end 722 of the left part 72, does not protrude beyond the median vertical longitudinal plane 34 of the chassis 2. For example, each part 71, 72 is movable by a width of more than 20% of the chassis gauge between the extreme positions, for example by approximately 1 m. In the preceding numerical example, the gauge of the first aggregate distribution assembly 7 can therefore vary between a width of 2.40 m and 4.4 m.The aggregate distribution parts 71, 72 each comprise a row of traps 700 distributed in the Y direction of the width, which can each be selectively controlled to send or not send aggregates towards the ground, as represented by respectively full and empty ovals in the . figure 3 The maximum working width of each moving part 71, 72, defined between the right 712, 722 and left 711, 721 ends, is that defined by their row of trapdoors 700.

[0032] According to the sliding embodiment of the invention, shown in figures 1 , 2 , 3 And 9, the second binder distribution assembly 8 comprises a fixed central part 80 of a size smaller than or substantially equal to the size of the chassis 2, and two movable binder distribution parts 81, 82 on the right, respectively on the left, which each have a size smaller than that of the chassis 2 and are provided behind or as shown in front of the fixed part 80. Each binder distribution part 81, 82 has a retracted position, in which its size is located in that of the chassis 2. Means, for example a jack, are provided for moving the width of each binder distribution part 81, 82 relative to the chassis 2.Each binder distribution part 81, 82 is able to be moved in both directions of the width direction Y between a first extreme retracted position, corresponding for example to the rest position and a second extreme extended position, in which it projects in width respectively from the right side and the left side of the chassis 2 seen from the rear. Between these two extreme positions, each binder distribution part 81, 82 is able to occupy several intermediate positions, in which it projects from the right side, respectively left side of the chassis 2. In the second extreme extended position of the parts 81, 82, their inner end, that is to say the left end 811 of the right part 81 and the right end 822 of the left part 82, does not project beyond the right vertical longitudinal plane 230, respectively left 240 of the chassis 2 and is located for example below in the right half, respectively left half thereof.The second extreme positions of the binder distribution parts 81, 82 correspond to those of the aggregate distribution parts 71, 72, the aggregate and binder distribution assemblies 7 and 8 having substantially the same maximum width. The binder distribution parts 80, 81, 82 comprise a plurality of nozzles 800 for projecting binder towards the ground, which are distributed in width, which are connected by pipes to one or more binder pumps supplied by the tank(s) 4 and which can each be selectively controlled to project or not to project binder. The maximum working width of each movable part 81, 82, defined between the right 812, 822 and left 811, 821 ends, is that defined by their row of nozzles 800.

[0033] Of course, the repair unit 1 may be part of a self-propelled machine 100 which is not of the dual-spreader type, nor of the synchronous gravel spreader type. The repair unit 1 may also be provided on a trailer to be towed by a self-propelled vehicle on the roadway.

[0034] As shown by way of non-limiting example in figures 4 à 9 , according to the invention, the aggregate distribution assembly 7 comprises a blade 9 regulating the flow of aggregates. The blade 9 extends in the direction Y of the common width of the plurality of prescribed width ranges P downstream of the plurality of traps 700 in the direction of flow of the aggregates 7 from top to bottom, represented by the arrows F at figures 4 And 5 . The blade 9 makes it possible to dose the flow of aggregates sent by each hatch 700 in the open position of this hatch 700. The blade 9 is for example metallic.

[0035] A rotating cylinder 10 for discharging aggregates towards the ground extends along the Y direction of the common width of the plurality of prescribed width ranges P under the aggregate flow regulating blade 9 and under the hatches 700. The cylinder 10 for discharging aggregates towards the ground is rotatably mounted around a fourth axis 101 of rotation of the aggregate distribution assembly 7, in a direction 103 of rotation. The cylinder 10 for discharging aggregates towards the ground may be formed of a roller 10 having a circular peripheral outer surface 102 (for example metallic) around the fourth axis 101 of rotation. The circular peripheral outer surface 102 of the cylinder 10 may be smooth (or solid). The conduit 702 for the passage of the aggregates is delimited downwards by a lower wall 703 (for example a metal sheet 703) descending towards the cylinder 10 for discharging the aggregates and is delimited upwards by an upper wall 704.The discharge cylinder 10 is rotated about the fourth axis 101 of rotation of the aggregate distribution assembly 7 in the direction 103 of rotation only during the aggregate spreading phases. This allows for clean stops and starts, without any subsequent flow of aggregates.

[0036] A mechanism 11 is provided for raising and lowering the aggregate flow regulating blade 9 relative to the rotating cylinder 10 for discharging the aggregates to the ground.

[0037] In this actuating mechanism 11, the aggregate flow regulating blade 9 is fixed to one (or more) driven levers 12 (represented by the hatching on the figure 5 ), which is rotatably mounted around a first axis 120 of rotation extending along the width direction Y. The aggregate flow regulating blade 9 is located at a first non-zero distance D1 from the first axis 120 of rotation. Several driven levers 12d, 12g may be provided, which are spaced apart from each other along the width direction Y and between which there are a hatch 700, several hatches 700 (at the figure 6 ) or all the hatches 700, which makes it possible to reinforce the structure and to guarantee the parallelism of the blade 9 regulating the flow of aggregates in relation to the cylinder 10 for discharging aggregates.

[0038] The mechanism 11 for actuating the aggregate flow regulating blade 9 comprises a reducing mechanism 16 arranged to reduce the displacement of the driven lever 12 and of the aggregate flow regulating blade 9 around the first axis 120 of rotation from the displacement of a device 15 for driving a second axis 140 of rotation (or shaft 140 or torsion bar 140). The second axis 140 of rotation is distinct from the first axis 120 of rotation. The second rotation axis 140 is connected to the first rotation axis 120 by the mechanism 16 reducing the movement of the driven lever 12, such that the rotation of the second rotation axis 140 causes the rotation of the driven lever 12 and of the aggregate flow regulating blade 9 relative to the first rotation axis 120 to vary a gap D for the passage of aggregates between the aggregate flow regulating blade 9 and the rotating aggregate discharge cylinder 10.

[0039] The first axis 120 of rotation is parallel to the fourth axis 101 of rotation and at a non-zero distance from the fourth axis 101 of rotation. The second axis 140 of rotation is parallel to the fourth axis 101 of rotation and at a non-zero distance from the fourth axis 101 of rotation. According to one embodiment of the invention, the second axis 140 of rotation is parallel to the first axis 120 of rotation and at a non-zero distance from the first axis 120 of rotation transversely to the first axis 120 of rotation.

[0040] The movement of the drive device 15 of the second rotation axis 140 thus makes it possible to finely dose the flow of aggregates by varying the spacing D of passage of aggregates between the blade 9 regulating the flow of aggregates and the rotating cylinder 10 for discharging the aggregates. The aggregate distribution assembly 7 comprises a control 20, comprising an interface actuable by the user, to control the movement of the drive device 15 and thus control the dosage of the flow of aggregates by the movement of the blade 9.

[0041] The aggregates may have a general particle size, greater than or equal to 1 mm and less than or equal to 3 mm. For this general particle size, greater than or equal to 1 mm and less than or equal to 3 mm, the spacing D for passage of aggregates between the aggregate flow regulating blade 9 and the rotating cylinder 10 for discharging the aggregates may be greater than or equal to 1 mm and less than or equal to 3 mm. The invention therefore makes it possible in this case to vary in a fine manner the spacing D for passage of aggregates between the aggregate flow regulating blade 9 and the rotating cylinder 10 for discharging the aggregates in this range of spacing greater than or equal to 1 mm and less than or equal to 3 mm. The outer peripheral surface 102 of the rotating cylinder 10 may have a radius relative to its axis 101 of rotation, which is greater than or equal to 50 mm and which is less than or equal to 500 mm.

[0042] The mechanism 16 reducing the movement of the driven lever 12 is configured to drive the second rotation axis 140 in rotation, such that a first length L1 of movement of the drive device 15 causes a second length L2 of movement of the aggregate flow regulating blade 9, smaller than the first length L1 of movement of the drive device 15, as shown by way of example in figures 5 And 6 The movement of the device 15 for driving the second axis 140 of rotation thus makes it possible to finely dose the flow of aggregates, by the fact that the movement L2 of the driven lever 12 and of the blade 9 regulating the flow of aggregates around the first axis 120 of rotation is caused by the movement L1 of the device 15 for driving the second axis 140 of rotation and is smaller than the movement L1 of the device 15 for driving the second axis 140 of rotation.

[0043] The displacement L1 of the device 15 for driving the second axis 140 of rotation may be the displacement L1 of one (or more) jacks 152. According to an embodiment of the invention, shown as an example in figure 6 , the device 15 for driving the second rotation axis 140 in rotation comprises an arm 151 integral in rotation with the second rotation axis (or shaft) 140. The jack 152 comprises a rod 1521 mounted to slide in a controllable manner relative to a barrel 1522 of the jack 152. The rod 1521 has its end 1523 located outside the barrel 1522, which is connected by an articulation 1524 (bolting or other) to an end part 1510 of the arm 151, which is located at a fourth non-zero distance D4 relative to the second rotation axis 140. The barrel 1522 of the cylinder 152 (for example the end 1526 of the barrel 1522 of the cylinder 152, which is furthest from the end 1523 of the rod 1521) is connected by another articulation 1525 (bolting or other) to a third axis 1527 of rotation provided in the aggregate distribution assembly 7. In this case, the displacement L1 of the drive device 15 is the displacement of the rod 1521 of the cylinder 152.The cylinder 152 may comprise a ball screw to ensure that there is no drift in the displacement L1 of the cylinder 152. The cylinder 152 (and therefore the drive device 15) may be, for example, electric. The cylinder 152 (and therefore the drive device 15) could also, in other embodiments, be hydraulic or pneumatic, or other. The cylinder 152 is distinct from the cylinders 709.

[0044] According to an embodiment of the invention, shown as an example in the figure 5 , the second axis 140 of rotation is connected to the first axis 120 of rotation by the displacement reducing mechanism 16, which is arranged such that the rotation of the second axis 140 of rotation by a second angle ANG2 of rotation causes the rotation of the driven lever 12 and the aggregate flow regulating blade 9 relative to the first axis 120 of rotation by a first angle ANG1 of rotation smaller than the second angle ANG2 of rotation. This also causes a reducing effect of rotation of the driven lever 12 and the aggregate flow regulating blade 9 about the first axis 120 of rotation from the rotation of the second axis 140 of rotation and therefore a reducing effect of the displacement of the driven lever 12 about the first axis 120 of rotation from the displacement of the drive device 15 of the second axis (or shaft) 140 of rotation.

[0045] This rotation-reducing effect of the driven lever 12 and of the aggregate flow regulating blade 9 around the first rotation axis 120 from the rotation of the second rotation axis 140 can be caused by the example structure described below of the mechanism 16 reducing the movement of the driven lever 12.

[0046] According to an example of the structure of the mechanism 16 reducing the movement of the driven lever 12 and of the blade 9 regulating the flow of aggregates, shown as an example in figure 5 , this comprises a connecting rod 13 or tie rod 13 (or several connecting rods 13d, 13g, or tie rods 13d, 13g, which are spaced apart from each other along the width direction Y and between which there is a trapdoor 700, several trapdoors 700 at the figure 6 or all the hatches 700), a first end portion 131 of which is articulated by a joint 133 on the driven lever 12. The first end portion 131 of the connecting rod 13 is located at a second non-zero distance D2 relative to the first axis 120 of rotation. The connecting rod 13 comprises a second end portion 132 located at a distance from its first end portion 131. The mechanism 16 reducing the movement of the driven lever 12 and the blade 9 regulating the flow of aggregates comprises a driving lever 14 (or several driving levers 14d, 14g, which are spaced apart from each other along the width direction Y and between which there are a hatch 700, several hatches 700 at the figure 6 or all the hatches 700), which is rotationally fixed to the second axis 140 of rotation. The connecting rod 13 is eccentrically connected to the second axis 140 of rotation. The second end portion 132 of the connecting rod 13 is articulated by another articulation 134 to the driving lever 14 and is located relative to the second axis 140 of rotation at a third non-zero distance D3, smaller than the second distance D2 and smaller than the first distance D1. For example, the second distance D2 is greater than or equal to twice the third distance D3 or five times the third distance D3. For example, the first distance D1 is greater than or equal to twice the third distance D3 or five times the third distance D3. The arm 151 is distinct from the driving lever 14. The driving lever 14 is distinct from the driven lever 12. The arm 151 is distinct from the driven lever 12.This further makes it possible to reduce the transmission of the relative inaccuracy of movement of the movement device 15 (namely of the cylinder 152 in the embodiments described above) to the movement of the aggregate flow regulating blade 9. According to one embodiment of the invention, the fourth distance D4 is greater than the third distance D3. For example, the fourth distance D4 is greater than or equal to twice the third distance D3 or five times the third distance D3. For example, the fourth distance D4 is greater than the second distance D2 or the first distance D1.

[0047] According to one embodiment of the invention, the connecting rod 13 has an adjustable length B between the first end part 131 and the second end part 132, which can be, for example, by the fact that the first end part 131 can be screwed (by a screw / nut connection 135 as shown in figure 5 ) and unscrewed relative to the second end part 132).

[0048] In other embodiments of the invention, such as for example for the set of connecting rods 13a, 13b, 13c described below, the connecting rod 13 has a fixed length B between the first end portion 131 and the second end portion 132 7.

[0049] According to an embodiment of the invention, shown in figure 6 , the hatches 700 occupy in total a determined total width Lmax over the entire prescribed width ranges P in the Y direction. The first axis 120 of rotation and the second axis 140 of rotation extend over the determined total width Lmax of the hatches 700 or over more than the determined total width Lmax of the hatches 700. figure 6 , the two trapdoors 100 located near the first driving levers 14d and 14g and the first connecting rods 13d and 13g and the first driven levers 12d and 12g are not shown to show these elements 14d, 14g, 13d, 13g, 12d, 12g.

[0050] According to one embodiment of the invention, the aggregate distribution assembly 7 comprises a device 110 for driving the rotating cylinder 10 for discharging the aggregates towards the ground at a constant rotation speed around the fourth axis 101 of rotation. This rotation drive device 110 may comprise, as shown by way of example in figure 6 , a rotary motor 111 driving in rotation by a chain 112 or a belt 112 a pinion 113 integral in rotation with the cylinder 10 around the fourth axis 101 of rotation. The speed of rotation of the rotary cylinder 10 for discharging the aggregates towards the ground around the fourth axis 101 of rotation is constant during the operation of the aggregate distribution assembly 7 and may have been set beforehand at a value greater than or equal to 50 revolutions per minute and less than or equal to 150 revolutions per minute.

[0051] According to one embodiment of the invention, the dosage of aggregates to the ground can vary from 170 to 1000 grams of aggregates per m 2 < of ground for the general granulometry of the aggregates, greater than or equal to 1 mm and less than or equal to 3 mm. For example, the dosage of aggregates to the ground can vary from 170 to 340 grams of aggregates per m 2 < of ground for the general granulometry of the aggregates, greater than or equal to 1 mm and less than or equal to 3 mm, for a forward speed of the mobile unit, equal to 7 km / h, a rotation speed of the cylinder 10 around its axis 101 of rotation, equal to 110 revolutions per minute and a radius of the outer surface 102 of the cylinder 10 relative to the axis 101 of rotation, equal to 160 mm.

[0052] According to an embodiment of the invention, shown as an example in figures 4 , 5 , 7 And 8, the aggregate distribution assembly 7 comprises a stop crosspiece 17 for the upper stop of the hatches 700 in their open position, shown as an example in figures 4 , 5 , 7 And 8 The stop crosspiece 17 extends over the determined total width Lmax of the hatches 700 or over more than the determined total width Lmax of the hatches 700. In their closed position, the hatches 700 are distant from the stop crosspiece 17. In its open position, the arm 714 of the hatch 700 abuts against the stop crosspiece 17. The arm 714 may comprise in its upper part, facing the stop crosspiece 17, a notch 713 having a complementary shape (for example having two rectilinear edges at right angles) with respect to that of the stop crosspiece 17 (which may for example be of rectangular or square section).

[0053] According to an embodiment of the invention, shown as an example in figures 4 ,5 , 7 And 8 , the stop crosspiece 17 is independent of the aggregate flow regulating blade 9. This prevents any disturbances, such as mechanical deformations, when opening and closing the hatches 700.

[0054] According to one embodiment of the invention, the stop crosspiece 17 can be mounted in an adjustable manner on supports 180 of the aggregate distribution assembly 7. According to one embodiment of the invention, shown as an example in figure 5 , the stop crosspiece 17 has several adjustment positions on the supports 180. These different adjustment positions of the stop crosspiece 17 correspond to several different opening distances of the hatches 700 relative to the cylinder 10 in their open position.

[0055] According to a first embodiment, the stop crosspiece 17 has a first position P a for adjusting a first distance, called short, for opening the hatches 700 relative to the cylinder 10 in their open position, which can be adopted when the aggregates are in a first domain G a of aggregate granulometry and which is that shown for the stop crosspiece 17 as an example in FIG. figure 5 The stop crosspiece 17 has a second position P b for adjusting a second distance, called long, for opening the hatches 700 relative to the cylinder 10 in their open position, which can be adopted when the aggregates are in a second range G b of aggregate granulometry. The second distance, called long, for opening the hatches 700 is greater than the first distance, called short, for opening the hatches 700. The first range G a of aggregate granulometry is lower than the second range G b of aggregate granulometry. The first range G a of aggregate granulometry can be greater than or equal to 1 mm and less than or equal to 3 mm, the second range G b of aggregate granulometry can typically be greater than or equal to 3 mm or 4 mm and less than or equal to 14 mm.

[0056] According to a second embodiment, which is an improvement of the first embodiment, the stop crosspiece 17 has a third position P c for adjusting a third distance, called intermediate, for opening the hatches 700 relative to the cylinder 10 in their open position, which can be adopted when the aggregates are in a third range G c of aggregate granulometry. The third distance, called intermediate, for opening the hatches 700 is greater than the first distance, called short, for opening the hatches 700 is smaller than the second distance, called long, for opening the hatches 700. The third range G c of aggregate granulometry is lower than the second range G b of aggregate granulometry and is higher than the first range G a of aggregate granulometry.The first domain G a of aggregate granulometry may be greater than or equal to 1 mm and less than or equal to 3 mm, the second domain G b of aggregate granulometry may typically be greater than or equal to 10 mm and less than or equal to 14 mm, the third domain G c of aggregate granulometry may typically be greater than or equal to 3 mm or 4 mm and less than or equal to 10 mm.

[0057] This allows for a versatile aggregate distribution set 7 for multiple aggregate gradings.

[0058] Furthermore, it may be provided with the mobile unit 1 for making and / or repairing with the aggregate distribution assembly 7 a kit comprising for each connecting rod 13 to be mounted between the driven lever 12 and the driving lever 14 a set of several connecting rods 13, which are of different lengths B between the first end part 131 and the second end part 132.

[0059] For example, one (or more) connecting rods 13a of the set, called long, having a first length B a between its first end portion 131 and its second end portion 132 is mounted as connecting rod 13 for aggregates located in the first granulometry range G a mentioned above. One (or more) connecting rods 13b, called short, having a second length B b between its first end portion 131 and its second end portion 132 is mounted as connecting rod 13 for aggregates located in the second granulometry range G b mentioned above. The first length B a of each first connecting rod 13a is greater than the second length B b of each second connecting rod 13b.

[0060] The long connecting rod(s) 13a of the set can for example be mounted as connecting rod 13 for aggregates located in the first granulometry range G a mentioned above with the stop crosspiece 17 mounted in the first position P a for adjusting the first distance, called short, of opening of the hatches 700 relative to the cylinder 10 in their open position.

[0061] The short connecting rod(s) 13b of the set can for example be mounted as connecting rod 13 for aggregates located in the second granulometry range G b mentioned above with the stop crosspiece 17 mounted in the second position P b for adjusting a second distance, called long, for opening the hatches 700 relative to the cylinder 10 in their open position.

[0062] For example, one (or more) connecting rods 13c of the set, called intermediate, having a third length B c between its first end part 131 and its second end part 132 is mounted as connecting rod 13 for aggregates located in the third granulometry domain G c mentioned above.

[0063] The third length B c is greater than the second length B b and is smaller than the first length B a . The intermediate connecting rod(s) 13c of the set can be mounted, for example, as connecting rod 13 for aggregates located in the third granulometry range G c mentioned above with the stop crosspiece 17 mounted in the third position P c for adjusting the third, so-called intermediate, opening distance of the hatches 700 relative to the cylinder 10 in their open position.

[0064] The set of connecting rods 13a, 13b, 13c makes it possible to increase the precision of the dosage of the aggregates and to improve the parallelism between the blade 9 regulating the flow of the aggregates and the cylinder 10 for discharging the aggregates.

[0065] The association of the adjustment position of the stop crosspiece 17 among the different adjustment positions and the assembly of the connecting rod 16 among the connecting rods of different lengths of the set makes it possible to define the type of aggregates (granulometry range) usable, with a possible fine adjustment around the average value.

[0066] This allows for a versatile aggregate distribution set 7 for multiple aggregate gradings.

[0067] According to an embodiment of the invention, shown as an example in the figure 9 , the aggregate distribution assembly 7 comprises a rear bar 18 extending along the Y direction of the width. The chassis 2 comprises one (or more) rollers 19 (or rolling device 19), which bears against and behind the rear bar 18. The rear bar 18 defines a support plane for the roller 19 or the rolling device 19. This makes it possible to dampen or eliminate vibrations of the aggregate distribution assembly 7 to allow regular (wave-free) spreading of the aggregates. The roller 19 (or rolling device 19) remains in contact with the rear bar 18 regardless of the position of the aggregate distribution assembly 7 along the Y direction of the width. The roller 19 (or rolling device 19) may have an adjustable anchor 190 relative to the chassis 2 to allow the absorption of forces.

[0068] According to one embodiment of the invention, the hatches 700 are capable of being moved between the open position and the closed position by rotation around the first axis 120 of rotation, which is therefore common to the plurality of hatches 700 and to the plurality of prescribed ranges P.

[0069] According to an embodiment of the invention, shown as an example in the figure 5 , the hatches 700 are side by side along the Y direction of the width and have on the sides 705 of their flap 701, transverse to the Y direction of the width, one (or more) brushes 706 (or broom 706 or scraper 706 or flap 706) for retaining the aggregates. This makes it possible to prevent the aggregates from passing between the hatches 700.

[0070] According to an embodiment of the invention, shown as an example in the figure 5, one (or more) aggregate retaining brushes 707 (or broom 707 or scraper 707 or flap 707) is mounted to bear against the aggregate discharge cylinder 10 upstream of the aggregate flow regulating blade 9 and upstream of the hatches 700 in the direction F of flow of the aggregates, over the determined total width Lmax. The aggregate retaining brush(es) 707 may be mounted for example at the edge of a support wall 708 fixed under the lower wall 703, the lower wall 703 extends at a non-zero distance from the aggregate discharge cylinder 10. This makes it possible to prevent the aggregates from passing behind the cylinder 10, that is to say in the opposite direction to its direction 103 of rotation.

Claims

1. Mobile unit (1) for the construction and / or repair of a road surface composed of a layer of binder and a layer of aggregate, the unit (1) comprising: a chassis (2), on which are mounted a container (3) for storing aggregates, a tank (4) for storing binder, a binder distribution assembly (8) and an aggregate distribution assembly (7), the aggregate distribution assembly (7) comprising a plurality of hatches (700) which are distributed in the direction (Y) of the width of the chassis (2) over a respective plurality of prescribed width ranges (P) and which are each capable of being selectively moved either into an open position according to a spreading command for spreading aggregates downwards in the prescribed width range (P) associated with the hatch (700), or in a closed position according to a no spreading command so as not to spread aggregates in the prescribed range (P) of width associated with the hatch (700), the binder distribution assembly (8) being able to spread binder selectively in each prescribed range (P) of width of the plurality of prescribed ranges (P) of width according to the spreading command and not to spread binding agent selectively in each prescribed range (P) of width according to the no-spreading command, the aggregate distribution assembly (7) also comprising: - an aggregate flow regulating blade (9) extending in common of the plurality of prescribed width ranges (P) downstream of the plurality of hatches (700), - a rotating cylinder (10) for discharging the aggregates to the ground, wherein the rotating cylinder (10) for discharging the aggregates to the ground extends in common of the plurality of prescribed width ranges (P) under the aggregate flow regulating blade (9), - a mechanism (11) for actuating the aggregate flow regulating blade (9), characterized in that the mechanism (11) for actuating the aggregate flow regulating blade (9) comprises: - at least one driven lever (12), which is mounted so as to rotate about a first axis (120) of rotation and to which is fixed the aggregate flow regulating blade (9) situated at a first non-zero distance (D1) from the first axis (120) of rotation, a mechanism (16) for reducing the displacement of the driven lever (12) based on the displacement of a drive device (15) for driving a second axis of rotation (140), which is distinct from the first axis of rotation (120) and which is connected to the first axis of rotation (120), such that the rotation of the second axis of rotation (140) causes the rotation of the driven lever (12) relative to the first axis of rotation (120) to vary a spacing (D) for the passage of aggregates between the aggregate flow regulating blade (9) and the rotating cylinder (10) for discharging the aggregates, the mechanism (16) for reducing the displacement of the driven lever (12) being configured to rotate the second axis (140) of rotation, such that a first displacement length (L1) of the drive device (15) causes a second displacement length (L2) of the aggregate flow rate regulating blade (9), smaller than the first displacement length of the drive device (15).

2. Unit according to claim 1, characterized in that the second axis of rotation (140) is connected to the first axis of rotation (120) such that the rotation of the second axis (140) of rotation through a second angle (ANG2) of rotation causes the rotation of the driven lever (12) relative to the first axis (120) of rotation through a first angle (ANG1) of rotation smaller than the second angle (ANG2) of rotation.

3. A unit according to any one of the preceding claims, characterized in that the device (15) for rotating the second axis (140) of rotation comprises: an arm (151), which is rotationally fixed to the second axis (140) of rotation, a jack (152), which is connected to an end part (1510) of the arm (151), located at a fourth non-zero distance (D4) from the second axis (140) of rotation.

4. Unit according to any one of the preceding claims, characterized in that the mechanism (16) for reducing the displacement of the driven lever (12) comprises: - at least one connecting rod (13), having a first end part (131), which is articulated on the driven lever (12) and which is located at a second non-zero distance (D2) from the first axis (120) of rotation, and a second end part (132), - at least one driving lever (14), which is fixed in rotation to the second axis (140) of rotation and on which the second end part (132) of the connecting rod (13) is articulated, wherein the second end part (132) of the connecting rod (13) is located at a third non-zero distance (D3) from the second axis (140) of rotation, smaller than the second distance (D2).

5. Unit according to claim 4, characterized in that the connecting rod (13) has an adjustable length (B) between the first end part (131) and the second end part (132).

6. Unit according to claim 4 or 5, characterized in that there are provided as connecting rod (13) a plurality of connecting rods (13d, 13g), between which there is a group of one, several or all hatches (700) along the width direction (Y), there is provided as driving lever (14) a plurality of driving levers (14d, 14g) between which is located the group of one, several or all hatches (700) along the width direction (Y), there are provided as driven lever (12) several driven levers (12d, 12g) between which are the group of one, several or all the hatches (700) along the width direction (Y), the aggregate flow regulating blade (9) being fixed to the driven levers (12d, 12g).

7. Unit according to claim 3 taken in combination with any one of claims 4 to 6, characterized in that the fourth distance (D4) is greater than the third distance (D3).

8. Unit according to any one of the preceding claims, characterized in that the second axis (140) of rotation is parallel to the first axis (120) of rotation and at a distance from the first axis (120) of rotation transversely to the first axis (120) of rotation.

9. Unit according to any one of the preceding claims, characterized in that the aggregate distribution assembly (7) includes a device (110) for rotation at a constant speed of rotation of the rotating cylinder (10) for discharging the aggregates to the ground.

10. Unit according to any one of the preceding claims, characterized in that the aggregate distribution assembly (7) includes a stop cross-piece (17) for the upper stop of the plurality of hatches (700) in their open position, the plurality of hatches (700) occupying a determined total width (Lmax), the stop cross-piece (17) extending at least over the determined total width (Lmax) of the plurality of hatches (700).

11. Unit according to claim 9 or 10, characterized in that the stop cross-piece (17) has several adjustment positions corresponding to several different opening distances of the hatches (700) with respect to the cylinder (10) in their open position.

12. Unit according to any one of the preceding claims, characterized in that the aggregate distribution assembly (7) includes a rear bar (18) extending in the width direction (Y), the chassis (2) includes at least one castor (19), which rests against and behind the rear bar (18), an adjustable anchorage (190) of the castor (19) relative to the chassis (2) being provided.

13. Kit for construction and / or repair of a road surface, comprising a mobile construction and / or repair unit (1) according to any one of the preceding claims, when they depend on at least one of any one of claims 4 to 7, characterized in that the kit also includes for each connecting rod (13) to be mounted between the driven lever (12) and the driving lever (14) a set of several connecting rods (13), which have different connecting rod lengths (B) between the first end part (131) and the second end part (132): said connecting rods (13) of the set comprising at least one connecting rod (13a), referred to as long, having a first connecting rod length (Ba) for aggregates in a first particle size range (Ga), and at least one connecting rod (13b), referred to as short, having a second connecting rod length (Bb) for aggregates in a second particle size range (Gb), the first connecting rod length (Ba) being greater than the second connecting rod length (Bb), the first particle size range (Ga) being lower than the second particle size range (Gb).

14. Kit according to claim 13, characterized in that the connecting rods (13) of the set include at least one connecting rod (13c), referred to as intermediate, having a third connecting rod length (Bc) for aggregates located in a third particle size range (Gc), the third connecting rod length (Bc) being greater than the second connecting rod length (Bb) and being smaller than the first connecting rod length (Ba), the third particle size range (Gc) being lower than the second particle size range (Gb) and being higher than the first particle size range (Ga).

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