FR3074198A1 - GRANULATE TRANSFER DEVICE - Google Patents

Abstract

The invention relates to a granulate transfer device (101) comprising a granulate feed mouth (102), a granulate receiving chute (103) from the mouth, a screw (104) in the chute ( 103), the chute (103) having a longitudinal wall (1030) extending along an axis (1040) of rotation of the screw (104) and a granulate outlet remote from the mouth (102) parallel to the axis ( 1040), the screw (104) having an external thread (1041) to be able to move, by rotation of the screw (104) about the axis (1040) of rotation, the granulate in the chute (103) along the axis (1040) from the mouth (102) to the granule outlet. The invention is characterized in that the device comprises a member (105) at least partially retaining the granulate, fixed to a support (106) fixed relative to the chute (103), extending at least partly in a upper section of the chute (103) and in the stroke of the external thread (1041) of the screw (104) and being able to be inclined by abutment against the external thread (1041) during the rotation of the screw (104) , which makes it possible to obtain a fully loaded screw upstream and a partially loaded screw downstream.

Description

The invention relates to an aggregate transfer device.

One field of application of the invention relates to machines used for repairing pavements, by spreading gravel as aggregate, which use such a transfer device. We know, for example, machines of the gravel spreader type, which are rolling machines for spreading gravel on a pavement, machines of the twin-spreader type or synchronous spreader spreader (RGS) type and machines of the “wrapper-sprayer” type, which are rolling machines for spreading gravel and a binder on the road.

In the transfer device, the aggregate can be conveyed by a rotary screw into a chute from an aggregate feed mouth to an aggregate outlet. The screw ensures the dosage of aggregate at the outlet, which allows by controlling the speed of rotation of the screw to control this dosage.

One of the problems of the transfer device is that the screw can be very loaded with aggregates, in particular at low dosages of aggregates.

Since the larger the loading of aggregates, the greater the torque required to rotate the screw, a large loading of the screw leads to a major drawback: the screw deforms and rises in the chute until it locks against spacers spanning the two upper edges of the chute above the screw, usually provided.

The invention aims to obtain an aggregate transfer device and a repair and / or pavement making unit comprising this transfer device, which overcomes this drawback of the state of the art.

To this end, a first object of the invention is an aggregate transfer device, comprising at least one aggregate feed mouth, at least one chute for receiving aggregate from the mouth, at least one screw being in the chute, the chute having a longitudinal wall extending along an axis of rotation of the screw and at least one aggregate outlet distant from the mouth parallel to the axis of rotation, the screw having an external thread located near the longitudinal wall of the chute so as to be able to move, by rotation of the screw around the Rotation Fee, the aggregate in the chute along the Rotation Fee from the mouth to the outlet of the aggregate.

According to one embodiment of the invention, the device comprises at least one at least partial retaining member for the aggregate.

According to one embodiment of the invention, the retaining member being fixed to a fixed support relative to the chute.

According to one embodiment of the invention, the retaining member extending at least in part in an upper section of the chute and in the course of the external thread of the screw and being able to tilt by abutment against the external thread during rotation of the screw.

Thanks to the invention, the retaining member performs a function of regulating the loading of the aggregate screw, which thus remains at a reasonable level. This reduces the rotation torque of the screw. Thanks to the invention, the screw does not deform and remains in its position provided at the bottom of the trough, guaranteeing a transfer of the aggregate located in the bottom of the trough and avoiding a blocking of the screw against the parts located above her.

According to one embodiment of the invention, the retaining member is of the brush type.

According to one embodiment of the invention, the support is rigid, extends over a determined height above the external thread and is capable of retaining aggregate.

According to one embodiment of the invention, the retaining member extends over the entire width of the chute.

According to one embodiment of the invention, the retaining member is located near the aggregate feed mouth.

According to one embodiment of the invention, the retaining member is located closer to the aggregate feed mouth than the aggregate outlet.

According to one embodiment of the invention, the aggregate feed mouth opens into a granulate reception section of the chute, located at one end of the chute.

According to one embodiment of the invention, the aggregate supply mouth opens out above a granulate reception side of the chute, lateral with respect to the axis of rotation, the chute having an upstream wall, transverse to the axis of rotation and located upstream of the screw in the aggregate transfer direction from the aggregate feed mouth to the aggregate outlet, the member extends at an angle to the axis of rotation in top view, from a first point situated against a first upper lateral edge of the chute, where the receiving side is located, at a second point situated against a second upper lateral edge of the chute, opposite to the first upper lateral edge, the first point being closer to the upstream wall than the second point.

According to one embodiment of the invention, the external thread makes a first angle of inclination with respect to the axis of rotation, the retaining member extends in top view at a second angle of inclination with respect to the axis of rotation, less than the first angle of inclination.

According to another embodiment of the invention, the external thread makes a first angle of inclination relative to the axis of rotation, the retaining member extends in top view according to a second angle of inclination relative to to the axis of rotation, greater than the first angle of inclination.

According to one embodiment of the invention, the retaining member comprises a first lateral section, which rises from a first point situated against a first upper lateral edge of the chute to a third point situated above the screw and of the chute, and a second lateral section, which descends from the third point to a second point situated against a second upper lateral edge of the chute, opposite to the first upper lateral edge.

A second object of the invention is a mobile unit for repairing and / or making a floor, comprising a frame, on which is mounted a container for storing gravel as aggregate and a first spreading assembly, making it possible to spread gravel on the roadway, characterized in that it comprises an aggregate transfer device as described above, the mouth of which is connected to the gravel storage container and the outlet of which is connected to the first spreading assembly, to transfer the gravel by the transfer device from the gravel storage container to the first spreading assembly.

According to one embodiment of the invention, the mobile unit for repairing and / or making a roadway further comprises a binder storage tank, and a second spreading assembly, making it possible to spread binder from the tank on the floor.

According to one embodiment of the invention, the spreading assembly is a spreading assembly, making it possible to spread in a targeted manner gravel and binder in an area of the roadway, located in front of the front side and / or located laterally with respect to the front side and to the rear side, the spreading assembly comprising at least a first outward deployment member, mounted movably on the chassis, the first member comprising a first connected end portion to the chassis and a second end part distant from the first end part, the first outward deployment member being able to occupy a first position of extension relative to the chassis, in which the second end part is located above said zone, the spreading assembly comprising a second support member serving to support an outlet head for gravel and binder, the second support member comprising a third end portion distant from a fourth end portion on which the head is mounted, the third end portion being connected to the second end portion, the spreading assembly comprising at least one conduit and means for conveying gravel in the conduit to bring gravel from the storage container to the head, the spreading assembly further comprising at least one pipe going from the tank to the head and at least one pump to bring the binder into the pipe from the tank to the head.

The invention will be better understood on reading the description which follows, given solely by way of nonlimiting example with reference to the appended drawings, in which:

- Figure 1 is a schematic perspective view of an aggregate transfer device according to one embodiment of the invention,

FIG. 2 is a schematic top view of the aggregate transfer device according to FIG. 1,

- Figure 3 is a schematic perspective view of the aggregate transfer device of Figure 1, part of which downstream has not been shown,

- Figure 4 is a schematic side view of an aggregate transfer device of Figure 1, a downstream part of which has not been shown,

- Figure 5 is a schematic side view of a pavement repair unit in which the transfer device according to the invention can be used,

FIG. 6 is a schematic perspective view from above of the pavement repair unit according to FIG. 5,

- Figure 7 is a schematic perspective view of a spreading assembly of the repair unit in the extended position according to Figure 5,

FIG. 8 is a diagrammatic view on a larger scale of part of the spreading assembly according to FIG. 7,

FIG. 9 is a schematic perspective view from above of another part of the spreading assembly of the repair unit according to FIG. 5,

FIG. 10 is a schematic perspective view from below of the part of the spreading assembly of FIG. 9,

FIG. 11 is another schematic perspective view from above of the part of the spreading assembly of FIG. 9,

FIG. 12 is a schematic perspective view from above of another part of the spreading assembly according to FIG. 5, and

FIG. 13 is a schematic perspective view from below of the other part of the spreading assembly of FIG. 12,

FIG. 14 is a schematic top view of the other part of the spreading assembly of FIG. 12,

- Figure 15 is a schematic perspective view of a spreading assembly of the repair unit of Figure 5 in the extended position,

FIG. 16 is a diagrammatic view on a larger scale of part of the spreading assembly according to FIG. 15,

FIGS. 17, 18 and 19 are schematic side, top and perspective views respectively of a pavement repair unit according to FIG. 5 in a first extension position,

FIGS. 20 and 21 are schematic views respectively from above and in perspective of a pavement repair unit according to FIG. 5, showing several possible extension positions,

- Figures 22, 23 and 24 are schematic perspective views respectively from above, from below and from above from another angle of view, of the other part of the spreading assembly according to Figure 5.

In the figures, the aggregate transfer device 101 can be provided for any type of aggregate transfer machine. For example, as described in the embodiments described below, the aggregate can be gravel, or the like.

In Figures 1 to 4, the aggregate transfer device 101 is described with reference to the transfer device 101a. Of course, the other transfer device (s) 101b and / or 101c may or may not be according to the transfer device 101.

The aggregate transfer device 101 includes a mouth 102 for supplying aggregate, making it possible to pour granulate into a chute 103 and a screw 104 located in the chute 103. The aggregate passes, for example, by gravity from the mouth 102 to the chute 103. The chute 103 has a longitudinal wall 1030, which extends along the axis 1040 of rotation of the screw 104, an upstream wall 1034, which extends transversely, for example perpendicularly, to the axis 1040 of rotation and is located upstream of the screw 104 in the direction DT of aggregate transfer, and a downstream wall 1035 which extends transversely, for example perpendicularly, to the axis 1040 of rotation and is distant from the upstream wall 1034 towards the downstream in the DT direction of aggregate transfer. The longitudinal wall 1030 of the chute 103 has a first upper lateral edge 1031 and a second upper lateral edge 1032, which delimit between them the upper opening 1033 of the chute 103 and which extend along the axis 1040 of rotation . These edges 1031 and 1032 are formed by vertical walls of the chute, which extend along the axis 1040 of rotation, the chute having for example a U-shaped cross section. The chute 103 may be of any material , for example rubber or others.

The rotation of the screw 104 around its axis 1040 in the chute 103 makes it possible to distribute the aggregate from the mouth 104 along the chute 103 in the direction DT of aggregate transfer, represented in FIG. 1, which is parallel to Tax 1040 rotation. To this end, the screw 104 has an external thread 1041 located along the longitudinal wall 1030 of the chute 103 to move, by rotation of the screw 104 around the 1040 rotation tax, the aggregate in the chute 103 in the direction DT for aggregate transfer. The chute 103 has an aggregate outlet distant from the mouth 102 in the direction DT, in order to be able to remove the aggregate from the chute 103.

According to one embodiment, the device comprises at least one member 105 for at least partial retention of the aggregate in the trough 103.

According to one embodiment, the retaining member 103 extends at least in part in an upper section of the trough 103 and can also extend above the external thread 1041.

According to one embodiment, the retaining member 103 extends in the course of the external thread 1041 of the screw 104 and is configured to tilt against the external thread 1041 during the rotation of the screw 104, being able to leave pass a little aggregate located at height during this tilt. The retaining member 105 is fixed, for example by its upper end to a support 106, itself fixed relative to the trough 103 and for example fixed thereto.

The retaining member 105 thus makes it possible to retain all or part of the aggregate poured from the mouth 102 and being upstream at the height of this member 105, and this against the movement imparted by the screw 104, allowing to the aggregate lying under the level of this member 105 to be discharged by the rotary movement of the screw 104 transferring this aggregate in the direction DT downstream. The retaining member 105 forms a support member against the aggregate in the chute 103.

The screw can thus be fully loaded with aggregate upstream of the retaining member 105 and be partially loaded with aggregate downstream. This causes a controlled evacuation of the aggregate over a small height under the retaining member 105, avoiding excessive loading of the screw 104 in aggregate. The largest aggregate height is thus confined upstream of the retaining member 105 in the section 1036 for receiving aggregate in the chute 103. The greatest height of aggregate in this section 1036 for receiving the chute 103 can act as a barrier to a greater flow of granulate coming from the mouth 102, thus preventing the arrival of too large a quantity of aggregate over too long a length of the chute 103 (the length being taken parallel to the axis 1040 of rotation). This avoids deforming the screw 104 by preventing there being too much aggregate in the chute 103.

If necessary, part of the aggregate located at the level of the member 105 and upstream thereof, can, by the rotary movement of the screw, pass through the retaining member 105, while another part of the granulate located at the level of the member 105 and upstream thereof is retained upstream against this member 105.

The screw 104 provides the dosage of aggregate at the outlet 105. The device may include a control station, making it possible to control the starting and the speed of rotation of the screw 104 around its axis 1040, in order to modify the dosage in aggregate at exit 105.

In one embodiment, the retaining member 105 is located near the mouth 102 for supplying aggregate, and / or closer to the mouth 102 for supplying aggregate than the outlet 1035 for aggregate.

In one embodiment, the aggregate feed mouth 102 opens into the section 1036 for receiving aggregate from the chute 103, this section 1036 for receiving aggregate being located at one end of the chute 103 and below the level of the mouth 102. The section 1036 for receiving aggregate is delimited by the upstream wall 1034.

The retaining member 105 may be a flexible member for pressing against the screw 104. The retaining member 105 may for example be of the brush type. For example, in the latter case, the member 105 comprises flexible bristles or flexible teeth (which may for example be made of a composite material or the like) extending in the course of the external thread 1041, which are prestressed in a first position located between the threads 1041a, 1041b of the external thread 1041 and which can pass from this first position to a second position raised upstream against the rotating external thread 1041.

In one embodiment, the retaining member 105 can occupy an upper part of the height of the external thread 1041, above the axis 1040. In another embodiment, the retaining member 105 can occupy any a height of the external thread 1041 and touch the axis 1040. The retaining member 103 is located at least partly in the upper opening 1033 delimited by the chute 103. The retaining member 103 is located at least partly under the level of the upper lateral edges 1031 and 1032 of the wall 1030.

In one embodiment, the retaining member 105 extends over the entire width of the trough 103 in its upper section.

In one embodiment, the support 106 is rigid and also has a function of retaining aggregate upstream above the external thread 1041. The support 106 extends over a determined height above the external thread 1041. The support 106 can be formed by a plate, for example metallic, or the like.

According to one embodiment, the retaining member 103 is turned towards the supply mouth 102, which can be lateral with respect to the section 1036 for receiving the chute 103, as described below and in the figures.

According to one embodiment, the mouth 102 for supplying granulate opens out above a side 1037 for receiving granulate from the chute 103, this side 1037 for receiving granulate being lateral with respect to the axis 1040 of rotation. . The receiving side 1037 is located at the first upper lateral edge 1031 of the chute 103.

According to one embodiment, the retaining member 105 extends at an angle relative to the axis 1040 of rotation when viewed from above. According to one embodiment, the retaining member 105 extends at an angle in the same direction as the external thread 1041 when viewed from above with respect to the axis 104 of rotation, but not parallel to the external thread.

According to one embodiment, the retaining member 105 extends between a first point 1051 situated against the first upper lateral edge 1031 of the chute 103 and a second point 1052 situated against the second upper lateral edge 1032 of the chute 103, this second edge 1032 being opposite to the first upper lateral edge 1031.

According to one embodiment, the first point 1051 is closer to the upstream wall 1034 than the second point 1052, so that the retaining member 105 is at an angle while facing the mouth 102 for lateral feed relative to to the chute 103. This facilitates the regulation of the aggregate coming from the mouth 102.

According to one embodiment, the external thread 1041 makes a first angle 1042 of inclination relative to the axis 1040 of rotation. The retaining member 105 extends in top view at a second angle 1053 of inclination relative to the axis 1040 of rotation, less than the first angle 1042 of inclination, as shown in FIG. 3. The second angle 1053 of inclination can be between 30 ° and 60 °, in particular between 40 ° and 50 °, and can be equal for example to 45 °. The first angle 1042 of inclination may for example be greater than 60 °.

In another embodiment not shown, the second angle 1053 of inclination may be less than the first angle 1042 of inclination.

In other embodiments, the supply mouth 102 may be at a longitudinal upstream end of the chute 103, for example above and / or at the end of the upstream wall 1034. In this case, the member 103 retaining element is turned towards the mouth 102 for supplying aggregate, being able for example to be perpendicular to the axis 1040 of rotation of the screw 104 or being able to be at an angle with respect to this axis 1040.

According to one embodiment, the retaining member 105 is in two sections 1054 and 1056 starting from the side edges 1031 and 1032 of the chute 103 and rising above the latter. The retaining member 105 thus has a greater contact surface with the screw 104. The retaining member 105 may for example have the shape of a circumflex accent in the trough 103, as described below. The first lateral section 1054 rises from the first point 1051 situated against the first upper lateral edge 1031 to a third point 1055 situated above the screw 104 and above the chute 103. The second lateral section 1056 descends from the third point 1055 at the second point 1052 situated against the second upper lateral edge 1032. Each section 1054, 1056 can for example be rectilinear. The sections 1054 and 1056 may for example be at least the lower ends of the retaining member 105, and possibly also extend to the upper end of the retaining member 105, fixed to the support 106.

The transfer device 101 described above can be part of a mobile unit 1 for repairing and / or making a floor.

We describe below embodiments of such a mobile unit 1 for repairing and / or making a floor, with reference to FIGS. 5 to 24.

In this case, the aggregate consists of gravel and the device 101 is a device 101 for transferring gravel. This mobile unit 1 comprises a chassis 2, on which are mounted a gravel storage container 3 (which may include a grab 30 or gravel hopper 30) and a first spreading unit 4, allowing to spread gravel on the floor . The gravel supply mouth 102 is connected to the gravel storage container 3 to receive the gravel from this container 3 and pour it into the chute 3. The gravel outlet 105 is connected to the first spreading unit 4, for transferring the gravel by the device 101 for transfer from the gravel storage container 3 to the first spreading unit 4.

According to one embodiment, the mobile unit 1 can further comprise a binder storage tank 4a, which can be a binder tank (the binder can be an emulsion of bitumen and water, or bitumen), and a second spreading unit, allowing spreading of binder from the tank on the roadway.

According to an embodiment shown in FIGS. 5 and 6, the unit 1 for repairing a roadway is movable on this roadway, for example rolling using rolling wheels 23 on the roadway, which are rotatably mounted under the frame

2. For example, as shown in FIGS. 5 and 6, the unit 1 can be part of a self-propelled machine 100, 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 direction of advance from the rear to the front on the roadway. The chassis 2 has a front side 21 and a rear side 22. Of course, the chassis could be moved in the advancing direction or in the opposite direction.

According to embodiments, as described below, the spreading assembly 4 makes it possible to treat an area Z of the roadway, located in front of the front side and / or located laterally in the lateral direction T relative to the front side 21 and rear side 22, that is to say laterally with respect to the longitudinal direction L going from the rear side 22 to the front side 21, and therefore to the right or left with respect to this longitudinal direction L. L he spreading assembly 4 is arranged to spread in a targeted manner the gravel and the binder in the zone Z of the roadway. This zone Z of the roadway to be treated can for example be a hole Z in the roadway or more generally localized defects Z of wear of the roadway. For example, localized holes, called potholes, may be formed over time on a roadway that has been made, due for example to the repeated passage of heavy goods vehicles or other vehicles. These Z holes, of short length and width, on the other hand can have a fairly great depth, which can hinder the fluid circulation of passenger cars on the roadway. These holes Z may have a depth of 5 to 50 cm, and substantially of the same order of magnitude as their width or length. This type of machine is called a sprayer-type machine.

In the embodiment shown in Figures 5 to 24, the self-propelled machine 100 is for example a machine 100 of the bi-spreader or synchronous gravity spreader type. In this case, the unit 1 comprises on the rear side 22 a ramp 31 for distributing gravel on the roadway and a ramp 32 and / or 32a for spreading the binder on the roadway, which extend at least over a width comprising the rear side 22 (the width being taken in the lateral direction T, horizontal and transverse to the longitudinal direction L going from the rear side 22 to the front side 21). The gravel distribution ramp 31 is supplied with gravel from the gravel storage container 3 via another gravel supply device. The ramp 32 and / or 32a for spreading the binder is supplied with binder by the binder storage tank 4a via pipes. Such machines 100 are used for making the roadway, their ramps 31, 32 for distributing gravel and binder on the rear side are not used in this case to repair a hole Z in the roadway. Of course, the repair unit 1 can be part of a self-propelled machine 100 not being of the bi-spreader type, nor of the synchronous gravity spreader type. The repair unit 1 can also be provided on a trailer to be towed by a self-propelled vehicle on the road.

The spreading assembly 4 is for example of the articulated arm type at the end of which is a head 7 for leaving the gravel and the binder, coming from the container 3 and from the tank 4a.

The spreading assembly 4 comprises at least a first member 5 for deployment towards the outside and a second support member 6 serving to support the head 7 for the exit of the gravel and the binder, coming from the container 3 and from the tank 4a . The first member (s) 5 for deployment to the outside are mounted mobile on the chassis 2 and comprise a first end part 51 connected to the chassis 2 and a second end part 52 distant from the first end part 51. The first member 5 for deployment towards the outside is able to occupy a first position of extension towards the front and / or laterally with respect to the chassis 2, in which the second end part 52 is located above the zone Z and a second position relative to the chassis, in which the second end portion 52 is stored on the chassis 2, for example to have a width and / or length size less than the width and / or length of the chassis 2 This second storage position can be a folded position of the first deployment member with respect to the chassis 2.

The second support member 6 comprises a third end portion 61 distant from a fourth end portion 62 on which is mounted the head 7 for removing the gravel and the binder (or nozzle 7 for leaving the gravel and the binder) . The third end part 61 is connected to the second end part 52. The second support member 6 can thus be in the form of a “trunk”, that is to say of a member 6 extending vertically for the pouring of the gravel and the binder by the head 7 located at the bottom of the member. 6.

The first member 5 is for example articulated by an articulation 53 on the chassis 2. The chassis 2 can comprise a gantry 24 fixed to a base 25 of the chassis 2 on which the tank 4a and the container are mounted 3. The gantry 24 comprises by example an upper end 241 which is connected to the first end part 51, for example by the joint 53. The gantry 24 is for example disposed in front of the tank 4a and the container 3. For example, in the case where the repair unit 1 is integrated into a self-propelled machine having a front cabin 31, which can be a bi-spreader, the gantry 24 comprises a lower part 242 fixed to the base 25 and fixed to an upper part 243 comprising the upper end 241 , the lower part 242 of the gantry 24 is for example located behind the cabin 31 and in front of the tank 4a, itself located in front of the container 3. The upper part 243 of the gantry 24 and its upper end eure 241 connected to the first deployment member 5 are for example located above the cabin 31 and towards the front relative to the tank 4a. This minimizes the size of the spreading assembly 4, when it is in the second folded position.

For example, the first member 5 for deployment towards the outside can be an arm 5 having a first section 55 comprising the first end part 51 connected to the chassis 2 and a second section 56 comprising the second end part 52 remote from the first section 55, the second section 56 being articulated to the first section 55 by a second articulation 54. The articulation 53 is for example placed near the right or left side of the chassis 2, having a length less than the width of the chassis 2 in the lateral direction T. In the second storage position, shown in FIG. 6, the first section 55 of the deployment member 5 is folded behind and above the front side 21 of the chassis 2, as is the second section 56. The first section 55 extends in this storage position, for example parallel to the front side 21, while the second section 56 extends in this position folded parallel to the right or left side of the chassis 2.

According to one embodiment, the spreading assembly 4 comprises displacement means, for example with a jack, for example hydraulic, for moving the first member 5 for deployment from the second storage position to the first position of extension towards the outside and / or for moving the member 6 relative to the member 5. There is for example provided a first jack 57, 58 for operating the first member 5 for deployment relative to the frame 2, as for example in the embodiment shown in FIG. 6, a first jack 57 connecting the first section 55 to the gantry 24 at a distance from the first articulation 53 and a second jack 58 connecting the first section 55 to the second section 56 at a distance from the second articulation 54 , and / or a jack 59 for moving the member 6 relative to the member 5, this or these jacks being able to be hydraulic. The first deployment member 5 is capable of being moved so that the head 7 for removing the gravel and the binder can be placed in front of the front side 21 and / or on a right side and / or a left side of the chassis 2. For example , in the embodiment shown in FIGS. 5 to 24, because the articulation 53 is placed near the right side of the chassis 2, the first section 55 can be moved into the first extension position in front of the front side and / or to the right of it and the second section 56 can be moved in front of the front side 21 and / or to the right of the chassis 2 and / or to the left of the chassis 2.

The spreading assembly 4 comprises at least one conduit 8 for feeding the gravel from the container 3 to the head 7. The spreading assembly 4 also comprises conveyor means 9 for causing the gravel to move in the conduit 8 from container 3 to head 7.

According to one embodiment, these conveying means 9 comprise for example a blower 90 for sending a high air flow (arrows Fl in FIG. 5) in the duct 8 and a conveyor 91 for bringing the gravel (arrows F2 to the FIG. 5) from the container 3 to a device 92 for injecting the gravel into the conduit 8. This device 92 for injection can comprise a rotary barrel 93 allowing the injection of the gravel leaving the conveyor 91 into the air flow sent by the blower 90, in the duct 8. The conveyor 91 may comprise, in FIGS. 9 to 11, an endless conveyor screw 911 rotated in a second duct 912 going from the container 3 to a hopper 913 for discharging gravel by gravity in the barrel 93. The screw 911 makes it possible to take and dose the gravel, at a variable flow rate and controlled by a speed control of rotation of the screw 911. The container 3 for storing the gravel can be formed by e xample by a bucket 30 containing gravel and able to be tilted so that a lower opening for discharging gravel from the bucket 30 is above an inlet opening of the conveyor 91, in order to discharge the gravel therefrom. gravity. The conveyor 91, the hopper 913 and the injection device 92 are fixed to the chassis 2. The barrel 93 can be a rotary cylinder 931 comprising internal walls defining several compartments 930 open on the top under the hopper 913 to allow the passage of gravel and open on the underside to allow the passage of air. The barrel 93 is rotated relative to the fixed casing 932 of the injection device 92 around a vertical axis to fill gravel in turn its compartments 930 at a distance from the axis of rotation and so that each compartment 930 passes by rotation in turn between a pipe 901 for sending air and a pipe 902 for air outlet from the blower 90, located at a distance from the axis of rotation. The air supply pipe 901 opens under a lower part 9320 of the casing 932 of the injection device 92, located opposite the outlet pipe 902 opening onto an upper part 9321 of the casing 932, in order to push into the pipe 902 outlet by the air flow the gravel poured into each compartment 930 passing above the pipe 901 for sending air. The outlet pipe 902 is connected to the duct 8 to take the gravel into the air flow (arrows F3 in FIG. 5). The compartments 930 and the speed of rotation of the barrel make it possible to calibrate the quantity of gravel injected into the air flow, and avoid any blockage of the duct 8 carrying the gravel. The compartments 930 are for example all of the same horizontal extent under the hopper 913 and / or of the same height and / or of the same volume.

As shown in Figures 1 to 4, 6 and 9 to 11, the conveyor 91 may be formed of one or more transfer devices 101 as described above, the screw 104 forming the conveyor screw 911, the chute 103 forming the second conduit 912, the mouth 102 for supplying gravel being connected to the barrel 93 to receive the latter from the gravel, the outlet 105 being formed by the hopper 913 for pouring the gravel therein.

According to the embodiment shown in FIGS. 1 to 4, the conveyor 91 may include a first transfer device 101, referenced 101a, for transferring gravel from a first supply mouth 102, referenced 102a, in gravel with a first particle size , and a second transfer device 101, referenced 101b, for transferring gravel from a second supply mouth 102, referenced 102b, in gravel with a second particle size smaller than the first particle size. The first transfer device 101a and the second transfer device 101b are located for example side by side by one of their longitudinal edges. The first supply mouth 102a is supplied with gravel of the first particle size via a hopper 1020a, the upper opening 1021a of which is under a first lower opening of a first compartment of the container 3, storing the gravel of the first particle size. The second feed mouth 102b is supplied with gravel of the second particle size via a third transfer device 101 as described above, reference 101c, the gravel outlet 105, 105c of which is formed by the second feed mouth 102b . The third mouth 102, 102c for supplying gravel of the second particle size of the third transfer device 101c is formed by a second lower opening of a second compartment of the container 3, storing the gravel of the second particle size.

According to one embodiment, a first section of the conduit 8 arrives at an inlet 84 fixed to the third end portion 61 and directed in a first direction DI inlet making a non-zero angle with the third end portion 61 and / or the middle part 63 of the member 6. This first entry direction DI is non-vertical and can be substantially horizontal or oblique to the vertical 74 in the first position of extension of the member 5. This entry 84 is for example located near and outside the second end portion 52. This inlet 84 receives from the first section of the conduit 8 the flow of blown air in which the gravel is located. This inlet 84 is directed to a device 86 for deflecting the gravel downwards and for depressurizing the air flow. This device 86 comprises a depressurization pipe 85, for example turned upwards above the inlet 84, and serves to cause the air flow from the first section of the pipe 8 and sent by the blower 90 to start. device 86 comprises for example a stop part 87 against which the gravel from the inlet 84 is sent in the direction Dl, the depressurization line 85 being located between the inlet 84 and the stop part 87. The gravel, because they abut against the part 87 and are no longer entrained by the air flow, falls down in a second section of the conduit 8 extending downwards from this device 86, for example in the third end portion 61 to the head 7. For example, the second section of the conduit 8 is inserted into the third end portion 61 and into the middle portion 63 of the member 6 from which it protrudes up to head 7.

In addition, the fact that the gravel arrives in the head 7 practically vertically from a fairly high height of the member 6 with a depressurization makes it possible to obtain a zone Z filled with a compact mixture of gravel and binder and a plugging. with very few discharges outside the Z zone. The Z zone is filled in depth by a mixture of binder and gravel which self-compacts due to the high speed projection towards the ground. For the surface aspect, the Z zone thus filled can be covered by a surface part thanks to the traditional function of the bi-spreader.

The spreading assembly 4 comprises at least one pipe 10 going from the tank 4a to the head 7 and at least one pump 11 for bringing the binder into the pipe 10 from the tank 4a to the head 7.

According to one embodiment, the head 7 has an opening 71 for projecting the gravel and the binder, this opening 71 going downwards. According to one embodiment, the head 7 for removing the gravel and the binder is fixed to the lower end of the conduit 8. The head 7 makes it possible to project downwards onto the roadway a mixture of gravel and binder.

The duct 8 is for example made of a flexible material, for example of elastomer, and is for example fixed to the first and second members 5 and 6 and / or to the gantry 24 in one or more places of each of these.

According to one embodiment, the spreading assembly 4 comprises a disengageable locking system 12 between the second end part 52 and the third end part 61. The locking system 12 has an immobilization position and a declutching position. In the disengaged position, the third end part 61 is free to be moved according to at least one degree of freedom deviating from the vertical within a determined range of movement relative to the second part 52 end. In this disengaged position, the second end part 52 is suspended from the third end part 61. One or more degrees of freedom can be provided. The degree of freedom can be with one or more rotations deviating from the vertical relative to the second end portion 52. The degree or degrees of freedom can be obtained by one or more joints. The third end part 61 can be connected to the second end part 52 by one or more axis (s) of rotation or by a ball joint or cardan joint. In the immobilized position, the third end part 61 is fixed relative to the second end part 52.

In the embodiment shown in FIGS. 7 and 8, the second end part 52 is fixed to a support 521 connected by a first axis 621 of rotation to an intermediate piece 622. The third end part 61 is connected by a second axis 623 of rotation to the intermediate piece 622. The two axes of rotation

621 and 623 are not parallel and are not confused, for example being substantially horizontal. The two axes 621 and 623 can extend in two directions perpendicular to each other and can be intersecting or not. The intermediate piece

622 can for example surround the third end portion 61. The intermediate piece 622 has two opposite first sides, which are articulated by a joint 621a and another joint 621b respectively around the first axis 621 of rotation in connection with the support 521. The intermediate piece 622 has two other opposite sides which are articulated by an articulation 623a and another articulation 623b around the second axis 623 of rotation in connection with the third end part 61. The intermediate piece 622 is therefore located in this case between two wings 521a and 521b of the support 521. The intermediate piece 622 is for example of generally rectangular shape by its sides. The support 521 is for example mounted rotatably on an axis of rotation 522 of the second end part 52, the jack 59 being connected to the second end part 52 and to the support 521 at a distance from the axis of rotation 522.

According to one embodiment, the disengageable locking system 12 comprises a clamp 120 having a first jaw 121 and a second jaw 122 movable relative to the first jaw 121. The first jaw 121 and the second jaw 122 surround the third part 61 d 'end. The clamp 120 is fixed to the second end part 52, for example to its support 521, and is located at a distance from the articulation axis 621 and / or 623 and at a distance from the articulations 621a, 621b, 623a and 623b .

The jaws 121, 122 are able to be brought into contact with the third end part 61 so as to prevent the displacement of the third end part 61 deviating from the vertical relative to the second end part 52 in the immobilized position.

The jaws 121, 122 are able to be separated from the third end part 61 to allow the displacement of the third end part 61 deviating from the vertical according to at least one degree of freedom relative to the second part 52 end in the declutching position.

The clamp 120 therefore delimits, in the disengaged position, the determined range of movement within which the third end portion 61 can be moved according to the degree or degrees of freedom.

Thus, thanks to the spreading assembly 4 according to this embodiment, the head 7 for gravel and binder outlet can follow a pendulum movement suspended from the first deployment member 5, when the latter is in the first position d extension and when the locking system 12 is in the disengaged position. The repair unit 1 according to this embodiment thus makes it possible to precisely position the outlet head 7 at different locations located inside the zone Z to be treated. This positioning can be modified at will and in a precise manner by the user who can act in this disengaged position directly on the position of the second member 6 according to the degree (s) of freedom relative to the first deployment member 5 . The user, by acting directly on the movement of the second member 6 can thus safely and effortlessly move the head 7 above the desired location in the zone Z, having the possibility of controlling visually the correct discharge of the gravel and the binder at this location in the zone Z. The user can thus swing the second member 6 without exerting great efforts on it, so that the head 7 is moved above the whole of zone Z, being able to remain longer above the deeper places thereof than with respect to the shallower places, which makes it possible to adapt to any irregularity in zone Z. For example, the range determined in particular in the declutching position is an angular range greater than or equal to 5 ° or 10 °.

According to one embodiment, the spreading assembly 4 comprises at least one element for controlling the movement of the jaws 121, 122 between one and the other of the immobilized position and the disengaged position, for example by at least one jaw displacement cylinder 121, 122.

According to one embodiment, the second member 6 comprises a connecting element 124, which is located at a distance from the third end part 61. The connecting member 124 is able to be connected to a removable handlebar G. The handlebar G allows a user, when the handlebar G is connected to the connecting element 124 and when the spreading assembly 4 is in the first deployment position and in the disengaged position, to guide the movement of the second member 6 and therefore of the head 7 above different locations in the zone Z. A user can be in the cabin 30 to move the unit 1 and control the immobilization or disengaging position, while another user can be on the road to handle handlebar G.

The gravel and the binder sent by the conduit and the pipe reach the head 7 from where they come out to be poured over the zone Z and for example fill the hole when this zone Z is a hole.

The handlebar G can then be disconnected relative to the second member 6.

Then, after spreading the gravel and the binder through the head 7, it stops sending them to the latter and the locking system 12 is passed into the immobilized position. The first member 5 can then be controlled to pass from the first deployment position to the second storage position on the chassis 2.

The opening 71 for projecting the gravel and the binder of the head 7 has a predetermined two-dimensional extent in which there is a central point 72 of the opening 71.

According to one embodiment, the opening 71 of the head 7 is circular. The central point 72 can be located in the center of the circular opening 71. Of course, the opening 71 can have any other shape.

According to one embodiment, the spreading assembly 4 comprises a system 13 of displacement at a predetermined constant speed from the central point 72 of the opening 71. The displacement system 13 is arranged to move the central point 72 of the opening 71 for projecting the gravel and the binder along a trajectory 73 of predetermined displacement with respect to the fourth end part 62 of the second member 7.

According to one embodiment, this trajectory 73 of predetermined displacement is located at a distance from a vertical 74 taken relative to the fourth end part 62. This vertical 74 is for example taken relative to the center of the fourth end part 62 and / or to the center of the third end part 61. The trajectory 73 of displacement of the central point 72 can for example surround the vertical 74.

Thus, by virtue of this embodiment, the head 7 for removing the gravel and the binder automatically scans several different places located in the zone Z to be treated, in order to dump in the gravel and the binder. This embodiment thus makes it possible to ensure a homogeneous distribution and filling of the gravel and the binder in the zone Z to be treated, which can in particular be a hole to be filled in the pavement.

In addition, the fact that the gravel arrives in the head 7 practically vertically from a fairly high height of the member 6 and that the binder sent opens into the opening 71 of the head 7 ensures a certain depressurization of the conduit 8, which makes it possible to obtain a zone Z filled with a compact mixture of gravel and binder and a plugging with very little discharge outside the zone Z. Zone Z is filled in depth by a mixture of binder and gravel which self-compacts due to the high speed projection towards the ground. For the surface aspect, the Z zone thus filled can be covered by a surface part thanks to the traditional function of the bi-spreader.

According to one embodiment, the trajectory 73 of displacement of the central point 72 of the opening 71 of projection of the gravel and of the binder is for example circular with respect to the fourth end part 62, as shown by example in Figure 14.

According to one embodiment, represented in FIGS. 7, 12, 13 and 14, the displacement system 13 comprises at least one shaft 76a, 76b, 76c which is rotatably mounted around at least one respective axis 77a, 77b, 77c of rotation on the fourth end part 62, this shaft 76a, 76b, 76c respectively comprising an eccentric pin 78a, 78b, 78c located at a distance from the axis 67a, 67b, 67c of rotation. The eccentric spindle 78a, 78b, 78c drives along the path 73 of predetermined movement, by means 79a, 79b, 79c of connection a guide 75 for driving the head 7. Means 80a, 80b, 80c of rotation drive of the shaft 76a, 76b, 76c about the axis 77a, 77b, 77c of rotation are provided in the movement system 13. The connecting means 79a, 79b, 79c connect the eccentric pin 78a, 78b, 78c to the guide 75 and can comprise at least one link 79a, 79b, 79c.

For example, there may be provided three shafts 76a, 76b, 76c, which are rotatably mounted around respectively three axes 67a, 67b, 67c of parallel rotation and arranged in a triangle on the fourth end part 62. The three trees 76a, 76b,

76c respectively comprise three eccentric pins 78a, 78b, 78c located at a distance from each respective axis 67a, 67b, 67c. The displacement system 13 also comprises three connecting means 79a, 79b, 79c for respectively connecting the eccentric pins 78a, 78b, 78c to the guide 75.

According to one embodiment, the guide 75 is applied against the external surface of the pipe 8 for passing gravel.

According to one embodiment, the central point 72 of the opening 71 for projecting the gravel and the binder corresponds substantially to the center of the guide 75 or to a reference point of the guide 75. Thus, in the case where the trajectory 73 is circular , the center of the guide 75 describes a circular trajectory.

According to one embodiment, the conduit 8 is mounted movably in the guide 75. This allows, when the guide 75 is moved by the displacement system 13, that the guide 75 can slightly rotate around the conduit 8 while moving the latter along the predetermined path 73.

According to one embodiment, under the guide 75 may be a ring 83 fixed around the duct 8. This makes it possible to prevent the duct 8 from touching the frame 82 during its movement.

The displacement system 13 makes it possible to rotate the conduit 8 along the path 73 without significant rotation between the guide 75 and the conduit 8. In addition, the displacement system 13 is robust with respect to external pollution (bitumen, dust ).

According to one embodiment, the displacement system 13 is mounted on a frame 82 of the fourth end part 62, this frame 82 being located around the pipe 8 for passing gravel. The displacement system 13 guides the duct 8 relative to the framework 82, and therefore the central point 72 along the trajectory 73 of predetermined displacement relative to the framework 82.

The second support member 6 has a middle portion 63 connecting the third end portion 61 to the fourth end portion 62, this middle portion extending, for example, in length vertically.

According to one embodiment, the frame 82 comprises three uprights 82a, 82b, 82c which are spaced from one another, for example with a spacing increasing from top to bottom. Each upright 82a, 82b, 82c respectively has a fifth end portion 821a, 821b, 821c end, or upper, fixed to the middle portion 63 of the second member 6 and a sixth portion 822a, 822b, 822c end or lower. The three sixth end parts 822a, 822b, 822c are arranged in a triangle and are interconnected by a frame 823 delimiting a gaping passage 825 in which the duct 8 passes without touching the frame 823. The system 13 of displacement is mounted on the frame 823 and / or on the sixth end parts 822a, 822b, 822c.

The frame 823 allows better guidance of the conduit 8 by being able to bear on several support points of the frame 82 surrounding the conduit 8, as well as to a certain extent ensuring protection between the exterior and the conduit 8 carrying the head 7 for gravel and binder outlet. Thus, the frame 82 avoids that, during the deployment of the first member 5 towards the outside in the first extension position above the zone Z to be treated, the duct 8 or the head 7 does not strike an obstacle, this which avoids damaging the duct 8 and the head 7. But the framework 82 also provides a protective function vis-à-vis the users, who will at all times have the framework 82 and the frame 823 between them and the head 7 through which the gravel and the binder come out.

According to one embodiment, the frame 823 can be of general triangular shape, substantially horizontal in the first position of extension of the first deployment member 5. The frame 823 has three vertices 824a, 824b, 824c located respectively near the three sixth parts 822a, 822b, 822c of the end of the uprights 82a, 82b, 82c. The three shafts 76a, 76b, 76c are rotatably mounted on the three vertices 824a, 824b, 824c respectively. The frame 823 can comprise or be formed of three crosspieces 823a, 823b, 823c fixed together and / or fixed to the three sixth end parts 822a, 822b, 822c.

According to one embodiment, the guide 75 comprises a ring 751 surrounding the duct 8 and three tabs 752a, 752b, 752c peripheral fixed to the ring 751 and connected to the connecting means 79a, 79b, 79c, namely for example respectively three connecting rods 79a, 79b, 79c respectively through three joints 753a, 753b, 753c. The connecting rods 79a, 79b, 79c are also connected to the respective eccentric pins 78a, 78b, 78c by another articulation 791a, 791b, 791c distant from the articulations 753a, 753b, 753c.

According to one embodiment, the means for driving in rotation the shaft (s) 76a, 76b, 76c may for example comprise a drive motor (not shown), for example hydraulic, carried by the frame 82, for example carried by the frame 823. In the case of several shafts 76a, 76b, 76c, these can be rotated by a chain 81 meshing with sprockets 80a, 80b, 80c, fixed on the shafts 76a, 76b, 76c, one of the shafts, for example the shaft 76a, being fixed to the drive motor. The drive of the pinions 80a, 80b, 80c makes it possible to synchronize the eccentric pins 78a, 78b, 78c. The motor rotates the shaft 76a, and its eccentric spindle 78c, around the axis 67c of rotation, which also rotates via the chain 81 the sprockets 80b and 80c, and therefore the eccentric spindles 78b and 78c around their respective axes 67b and 67c. These rotations of the eccentric pins 78a, 78b, 78c move the connecting rods 79a, 79b, 79c, which then move the guide 75 pressing on the conduit 8 to make it describe the predetermined movement path 73. The path 73 corresponds to the path of the guide 75.

According to one embodiment, the constant speed of rotation of the shafts 76a, 76b, 76c around their respective axes of rotation 67a, 67b, 67c ensures that the central point 72 moves at a constant speed on the path 73, thus ensuring a uniform distribution of gravel and binder in zone Z.

According to one embodiment, the head 7 comprises a flange 15 comprising one or more orifices (for example with ten orifices) used for injecting binder downstream of the conduit 8, for example by internal injection holes distributed in the flange 15 around the flow of gravel sent by the conduit 8. The flange 15 has a binder inlet mouth 150, which communicates with the injection orifice (s) and which is also connected to the line 10 for sending binder. To this end, the pipe 10 can be connected to a box 16 fixed to the fourth end part 62, for example to the frame 82 and in particular to the frame 823, as shown in FIG. 7, this box 16 being itself - even connected by another pipe 14 (shown in FIG. 13) to the flange 15, this other pipe passing for example outside the fourth end portion 62 and outside the frame 82, so to prevent the pipe 14 from being trapped by moving parts of the displacement system 13.

The repair unit 1 may include an automatic control station, which may be present and installed in the cabin 31 or the like. This control station makes it possible to control the movements of the spreading unit 4 between Tune and the other from the first extension position and from the second storage position and / or between Tune and the other from position d 'immobilizer and declutching position. The control station may for this purpose comprise a display and / or control buttons and / or a control lever, for example a handle with monodirectional or multidirectional movement relative to a base and / or a touchscreen control, and /Or other. The control station, when located in the cabin 31, allows the user there to control the movement of the head support member 6 in direct vision.

The disengageable locking system 12 and the movement system 13 can be combined with each other, as shown by way of example in the figure.

7.

The disengageable locking system 12 can be provided without the displacement system 13.

The displacement system 13 can also be provided without the disengageable locking system 12, as shown in FIGS. 15 and 16.

In the embodiment shown in FIGS. 15 and 16, the second end part 52 is fixed to the support 521 fixed to the third end part 61.

An embodiment also relates to a method of spreading gravel and binder, implemented by the spreading assembly 4, and / or by the disengageable locking system 12 and / or by the displacement system 13, described above.

Of course, the above embodiments, characteristics, possibilities and examples can be combined with one another or be selected independently from one another.

Claims (18)

1. An aggregate transfer device (101), comprising at least one mouth (102) for supplying aggregate, at least one chute (103) for receiving aggregate from the mouth, at least one screw (104) located in the chute (103), the chute (103) having a longitudinal wall (1030) extending along an axis (1040) of rotation of the screw (104) and at least one aggregate outlet distant from the mouth (102) parallel to the axis (1040) of rotation, the screw (104) having an external thread (1041) located near the longitudinal wall (1030) of the chute (103) to be able to move, by rotation of the screw (104 ) around the axis (1040) of rotation, the aggregate in the chute (103) along the axis (1040) of rotation from the mouth (102) to the outlet of the aggregate, characterized in that the device comprises at least one member (105) for at least partial retaining of the aggregate, the retaining member (105) being fixed to a support (10 6) fixed relative to the trough (103), the retaining member (105) extending at least partly in an upper section of the trough (103) and in the course of the external thread (1041) of the screw (104) and being able to tilt by abutment against the external thread (1041) during the rotation of the screw (104). 2. Device according to claim 1, characterized in that the retaining member (105) is of the brush type. 3. Device according to any one of the preceding claims, characterized in that the support (106) is rigid, extends over a determined height above the external thread (1041) and is capable of retaining aggregate. 4. Device according to any one of the preceding claims, characterized in that the retaining member (105) extends over the entire width of the chute (103). 5. Device according to any one of the preceding claims, characterized in that the retaining member (105) is located near the mouth (102) for supplying aggregate. 6. Device according to any one of the preceding claims, characterized in that the retaining member (105) is located closer to the mouth (102) for supplying aggregate than the aggregate outlet. 7. Device according to any one of the preceding claims, characterized in that the mouth (102) for supplying granulate opens into a section for receiving granulate from the chute (103), located at one end of the chute (103 ). 8. Device according to any one of the preceding claims, characterized in that the mouth (102) for supplying granulate opens out above one side (1037) for receiving granulate from the chute (103), lateral by with respect to the axis (1040) of rotation, the chute (103) having an upstream wall (1034), transverse with respect to the axis (1040) of rotation and located upstream of the screw (104) in the direction ( DT) of aggregate transfer going from the mouth (102) of aggregate supply to the outlet (105) of aggregate, the member (105) extends at an angle relative to the axis (1040) of rotation in top view, from a first point (1051) situated against a first upper lateral edge (1031) of the chute (103), where the receiving side (1037) is located, at a second point (1052) situated against a second upper lateral edge (1032) of the chute (103), opposite the first upper lateral edge (1031), the first point (1051) was nt closer to the upstream wall (1034) than the second point (1052). 9. Device according to claim 8, characterized in that the external thread makes a first angle (1042) of inclination relative to the axis (1040) of rotation, the retaining member (105) extends in view above according to a second angle (1053) of inclination relative to the axis (1040) of rotation, less than the first angle (1042) of inclination. 10. Device according to claim 8, characterized in that the external thread makes a first angle of inclination relative to the axis (1040) of rotation, the retaining member (105) extends in top view along a second angle of inclination relative to the axis (1040) of rotation, greater than the first angle of inclination. 11. Device according to any one of the preceding claims, characterized in that the retaining member (105) comprises a first lateral section (1054), which rises from a first point (1051) situated against a first upper lateral edge (1031) of the chute (103) at a third point (1055) located above the screw (104) and the chute (103), and a second lateral section (1056), which descends from the third point (1055 ) at a second point (1052) located against a second upper lateral edge (1032) of the chute (103), opposite the first upper lateral edge (1031). 12. Mobile unit for repairing and / or making a floor, comprising a frame (2), on which is mounted a container (3) for storing gravel as aggregate and a first set (4) of spreading, allowing d spreading gravel on the roadway, characterized in that it comprises an aggregate transfer device according to any one of the preceding claims, the mouth of which is connected to the gravel storage container (3) and the outlet of which is connected to the first spreading assembly, for transferring the gravel by the transfer device from the gravel storage container (3) to the first spreading assembly. 13. mobile unit for repairing and / or making a roadway according to claim 12, characterized in that it further comprises a tank (4a) for storing binder, and a second spreading assembly, making it possible to spread binder from the tank on the floor. 14. Mobile unit for repairing and / or making a roadway according to claim 12 or 13, characterized in that the spreading assembly (4) is a spreading assembly (4), making it possible to spread a targeted manner of gravel and binder in an area (Z) of the roadway, located in front of the front side (21) and / or located laterally with respect to the front side (21) and the rear side (22), the whole (4) spreading comprising at least a first member (5) for deployment towards the outside, mounted movably on the chassis (2), the first member comprising a first end part (51) connected to the chassis (2) and a second end part (52) distant from the first end part (51), the first outwardly deploying member (5) being able to occupy a first position of extension relative to the chassis ( 2), in which the second end portion (52) is located above the said zone (Z), the spreading assembly (4) comprising a second support member (6) serving to support a head (7) for removing gravel and binder, the second support member (6) comprising a third end part (61) distant from a fourth end part (62) on which the head (7) is mounted, the third end part (61) being connected to the second part (52) d end, the spreading assembly (4) comprising at least one conduit (8) and means (9) for conveying gravel in the conduit (8) to bring gravel from the storage container (3) to the head (7), the spreading assembly (4) further comprising at least one pipe (10) going from the tank (4a) to the head (7) and at least one pump (11) for bringing the binder into the pipe (10) from the tank (4a) to the head (7). 3/18 5/18 FIG. 5 U. FIG. 11 ^{9 7} 18 10/18 824a _. 752a 823a FIG. 14 11/18 DJ 527h 84 CD 12/18 FIG. 17 13/18 FIG. 18 14/18 FIG. 19 15/18 R, RD FIG. 20 16/18 CM FIG. 21 17/18 82b 18/18 FIG. 24 FRENCH REPUBLIC irai - I NATIONAL INSTITUTE PROPERTY INDUSTRIAL RESEARCH REPORT PARTIAL PRELIMINARY established on the basis of the last claims filed before the start of the search see ADDITIONAL SHEET (S) National registration number FA 847115 FR 1761205 EPO FORM 1503 12.99 (P04C35) DOCUMENTS CONSIDERED AS RELEVANT Claims Affected Classification attributed to the invention by ΙΊΝΡΙ Category Citation of the document with indication, if necessary, of the relevant parts X X X AT US 2005/172837 Al (FLOR DEREK [US]) August 11, 2005 (2005-08-11) * the entire document * JP S55 19441 A (EBARA INFILCO) February 12, 1980 (1980-02-12) * the entire document * GB 548 271 A (CELLULOSE DEV CORP LTD; CYRUS DENNIS POTT; JOHN HENRY HULKS) October 2, 1942 (1942-10-02) * the entire document * JP Hll 208810 A (OKAWARA MFG) August 3, 1999 (1999-08-03) * the entire document * 1.4 to 11 1.3.5- 7 1.5- 9 1-11 E01C19 / 20 TECHNICAL AREAS SOUGHT (IPC) E01C B65G B30B Research Completion Date Examiner July 27, 2018 Kerouach, May CATEGORY OF CITES T DOCUMENTS: theory or principle underlying the invention E: patent document with an earlier date X: particularly relevant on its own at the filing date and which was not published until that date Y: particularly relevant in combination with a deposit or at a later date. other document of the same category D; cited in request A: technological background L: cited for other reasons O: unwritten disclosure P: interlayer document &: member of the same family, corresponding document Request number ABSENCE OF UNIT OF INVENTION ADDITIONAL SHEET B FA 847115 FR 1761205 The Research Division considers that the present patent application does not meet the requirement relating to unity of invention and concerns several inventions or pluralities of inventions, namely: 1. claims: 1-11 Aggregate transfer device comprising a retaining member 2.claims: 12-14 Mobile unit for repairing and / or making a roadway including an aggregate transfer device EPO FORM P0418 The first invention was sought. It is considered that there are several inventions covered by the claims. The reasons why the inventions are not linked together so that they form a single general inventive concept are as follows: The common object which links together the different groups of claims cited above is the subject of claim 1. This common object does not include a single general inventive concept, based on specific common or corresponding technical elements because the object of claim 1 is not new with respect to DI (= US 2005/0172837). In fact, DI describes a device 1 for transferring aggregates (see [0002] and FIG. 4, the DI device being capable of transferring aggregates), comprising at least one mouth 25 (see FIG. 1) for supplying aggregates, at least one chute 27 (see FIG. 1) for receiving aggregate from the mouth, at least one screw 17 (see FIG. 1) being in the chute 27, the chute 27 having a longitudinal wall extending along an axis of rotation of the screw (see figures) and at least one aggregate outlet distant from the mouth (see right part of Figure 1) parallel to the axis of rotation, the screw 17 comprising an external thread located near the longitudinal wall of the chute 27 in order to be able to move, by rotation of the screw around the axis of rotation, the aggregate in the chute along the axis of rotation from the mouth 25 to the outlet of the aggregate (see FIG. 4) , the device comprising at least one retaining member 33 at less partial of the aggregate (see Figures 2 and 4 and [...]), the retaining member being fixed to a support 43 fixed relative to the chute (see Figures 1 and 3), the retaining member extending at less partly in an upper section of the chute and in the course of the external thread of the screw (see figures 1 and 2) and being able to tilt by abutment against the external thread during the rotation of the screw (see figures 1 and 2). DI therefore describes all the features of claim 1. Consequently, the inventions cited above are not linked together so that they form only one general inventive concept. In addition, the subjects of the different groups of dependent claims page 1 of 2 Request number FA 847115 FR 1761205 ABSENCE OF UNIT OF INVENTION ADDITIONAL SHEET B The Research Division considers that the present patent application does not meet the requirement relating to unity of invention and concerns several inventions or pluralities of inventions, namely: are neither the same nor corresponding, since they aim to solve different problems. Indeed, the characteristics relating to the retaining member defined in claims 2-11 aim at better retaining the aggregates to avoid deformation of the screw due to an overload. Those relating to the mobile unit defined in claims 12-14 aim to better distribute the repair / construction materials on the roadway. Since the groups of claims are not linked to each other by a technical relationship which involves one or more specific or equivalent technical elements, the present application therefore lacks a single general inventive concept. Therefore, the present application does not meet the unity requirements of the invention.