EP0902125A1 - Apparatus for forming road materials - Google Patents

Abstract

The machine is in the form of a tracked vehicle (2) with a rear spreader (8) for the surfacing material (6), followed by a rigid transverse leveling blade (14). The machine has a front-mounted bin (5) to hold the surfacing material, and a conveyor (7) to transport the material to the rear, where it has a spreader and a rigid transverse blade. The blade has a regulator for adjusting its height and angle of inclination relative to the road surface, and is suspended from a carrier (15) articulated to a supporting frame (16) connected to the vehicle chassis. The leveling blade is of adjustable width, comprising a main section and an extension which fits between adjustable side walls.

Description

The present invention relates to a setting machine of road materials, including, before and rear, means for receiving a road material, means for conveying the road material to rear of vehicle, lateral distribution means material on a working surface, and a road material shaping device.

The invention applies more particularly to the re-profiling at zero pavements.

The so-called zero reprofiling operation of a pavement consists of dumping road material on the road surface and then to level the transverse profile of the road material so that the running surface is flush. This operation is usually one of the first steps in refitting condition of a damaged roadway.

A paver is a machine for implementing road materials consisting of a tractor generally on tracks and comprising, from front to back, a hopper for receiving a road material, a mat conveying the road material from the hopper to the rear, two transverse distribution half screws material on a working surface, and a road material shaping device under the form of a floating smoothing table.

For the implementation of road materials, a such a paver pushes a dump truck gradually its content in the finisher hopper.

The floating nature of the smoothing table opposes the use of the finisher for the operation of reprofiling of a roadway to zero, since the surface of pavement rolling is intended to be flush.

Up to now, graders have been used for resetting operations to zero. A grader is a self-propelled machine comprising a chassis fitted with wheels, in the center of which a transverse leveling blade is willing. A truck usually dumps the asphalt in front the grader, whose blade ensures leveling transverse.

However, using the grader to this operation poses several problems. So, from a apart, several grader passes are necessary to ensure correct distribution of road material on the processing surface, and on the other hand these successive passages can lead to phenomena of segregation and differential compaction within the road material. Finally, the grader does not allow decohesive and / or thin the material artwork.

The invention aims to solve the problems set out above and, in particular, to provide a contraption of road materials adapted for the resetting of a roadway to zero.

To this end, the invention relates to a machine for implementation of road materials, including, before behind, means for receiving a material road, means of conveying road material to rear of vehicle, lateral distribution means material on a working surface, and a road material shaping device, characterized in that the shaping device includes a transverse rigid blade for leveling the road material.

• le dispositif de mise en forme comprend des moyens de réglage de la hauteur et de l'inclinaison transversale de la lame par rapport à la surface de mise en oeuvre,
• la lame est montée sur un porte-lame articulé à un cadre de support qui est lui-même relié au châssis de l'engin, et au moins un vérin de réglage de la hauteur et de l'inclinaison transversale de la lame relie le porte-lame au cadre de support,
• la lame est une lame de largeur de nivellement réglable,
• la lame comprend une partie principale et au moins une partie de rallonge pouvant coulisser latéralement par rapport à la partie principale entre une position escamotée et au moins une position d'augmentation de la largeur de nivellement de la lame,
• il comprend en outre des parois latérales sensiblement verticales de retenue latérale du matériau, s'étendant longitudinalement de part et d'autre de la lame et des moyens de répartition de l'engin,
• l'écartement latéral des parois latérales est réglable,
• au moins une paroi est montée déplaçable latéralement, et les extrémités latéralement extérieures de la lame sont solidaires des parois latérales dans le sens latéral,
• la lame de nivellement a un profil incurvé vers l'avant de l'engin,
• le dispositif de mise en forme comporte des moyens de roulement,
• le dispositif de mise en forme est relié au châssis de l'engin par l'intermédiaire de bras latéraux, solidaires du châssis de l'engin ou articulés à celui-ci.

According to particular embodiments, the machine may include one or more of the following characteristics:

• the shaping device comprises means for adjusting the height and the transverse inclination of the blade relative to the implementation surface,
• the blade is mounted on a blade holder articulated to a support frame which is itself connected to the chassis of the machine, and at least one jack for adjusting the height and the transverse inclination of the blade connects the holder - blade to the support frame,
• the blade is an adjustable leveling width blade,
• the blade comprises a main part and at least one extension part which can slide laterally with respect to the main part between a retracted position and at least one position for increasing the leveling width of the blade,
• it also comprises substantially vertical lateral walls for lateral retention of the material, extending longitudinally on either side of the blade and means for distributing the machine,
• the lateral spacing of the lateral walls is adjustable,
• at least one wall is mounted to be moved laterally, and the laterally outer ends of the blade are integral with the lateral walls in the lateral direction,
• the leveling blade has a curved profile towards the front of the machine,
• the shaping device comprises rolling means,
• the shaping device is connected to the chassis of the machine by means of lateral arms, integral with the chassis of the machine or articulated thereto.

• la figure 1 est une vue schématique latérale d'un engin de mise en forme selon l'invention,
• la figure 2 est une vue latérale, schématique et agrandie, du dispositif de mise en forme de la figure 1, la lame de nivellement étant représentée en position rétractée et en position de nivellement, et
• la figure 3 est une demi-vue arrière gauche, schématique et agrandie, du dispositif de mise en forme de la figure 2, la paroi latérale gauche étant représentée dans deux positions correspondant respectivement à des écartements latéraux minimal et maximal entre les parois latérales.

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

• FIG. 1 is a schematic side view of a shaping machine according to the invention,
• FIG. 2 is a schematic and enlarged side view of the shaping device of FIG. 1, the leveling blade being shown in the retracted position and in the leveling position, and
• Figure 3 is a schematic enlarged left rear half view of the shaping device of Figure 2, the left side wall being shown in two positions corresponding respectively to minimum and maximum lateral spacings between the side walls.

Arrows II and III are used to locate the respective orientations of the views of FIGS. 2 and 3.

FIG. 1 represents a machine 1 for setting roadwork resulting from the modification a finisher. This machine includes the tractor 2 on paver tracks, and a setting device 3 form of road materials.

The tractor 2 comprises a chassis 4 and, from before behind (from left to right in Figure 1), a hopper 5 for receiving a road material 6, a bottom moving or conveyor belt 7 for conveying road material 6 towards the rear of the tractor 2, two half-screws 8 transverse, coaxial and reverse pitch, distribution side of road material 6 on a setting surface artwork 9.

These half screws can also be used to fragment, decohesive and homogenize the material 6, especially in the case where this material is a material bituminous coated cold.

The tractor 2 is provided with two arms of lateral leveling 10, articulated at 11 on the chassis 4. The arms 10 extend towards the rear of the tractor 2 and are each terminated by a substantially straight 12.

In a conventional finisher, these arms 10 are oscillating and support the smoothing table, which is arranged behind the half-screws 8 (right on the figure 1).

As shown in FIG. 1, these arms 10 have made integral with chassis 4 by means of tie rods side 13 of adjustable length, so that the parts 12 are substantially parallel to the surface 9. These arms 10 carry the shaping device 3, which replaces the finisher's smoothing table to form machine 1.

The device 3 comprises a rigid blade of leveling 14 substantially transverse to the tractor 2, a blade holder 15, a support frame 16 integral with the arm 10, and two lateral walls 114 for retaining the material 6 (in phantom in Figure 1), extending longitudinally on either side of the half-screws 8 and blade 14. All of these are basically metallic.

This device 3 further comprises means 17 for adjusting the position of the blade, means 18 for adjustment of the leveling width of the blade 14, and means 19 for connecting the device 3 to the tractor 2.

As it appears more clearly on the Figures 2 and 3, the frame 16 mainly comprises a U-shaped part 20, a portal frame 21, and a beam transverse 22.

The ends of the branches 23 of part 20 are each provided with a front connecting flange 24. Each flange 24 is bolted to a flange 25 ending at the rear each part 12 of the arms 10.

The branches 23 each extend a part 12, and the U-shaped part 20 defines a plane substantially parallel to the surface 9.

The uprights 26 of the gantry 21 are each fixed, for example by welding or bolting, at a branch 23, away from the base beam 27 of the U-shaped part 20.

The uprights 26 are substantially orthogonal to the branches 23, the gantry 21 extending above the part 20. The gantry 21 defines a plan substantially orthogonal to surface 9 and transverse to tractor 2.

The transverse beam 22 is hollow, and it is fixed, for example by welding or bolting, on the lower surfaces (in FIGS. 1 to 3) of the branches 23, near the flanges 24 and so as to be substantially transverse to the tractor 2.

The blade holder 15 is a frame which is substantially rectangular arranged inside the U-shaped part 20 and articulated to the latter. The blade holder 15 comprises the front, a first substantially transverse beam 28 to the tractor 2 and which carries the blade 14, at the rear a second beam 29 substantially transverse to the tractor 2 and articulated to the beam 27 of the U-shaped part 20, and two substantially longitudinal side beams 30 at tractor 2 and each connected by a jack 31 to a upright 26 of gantry 21.

The central part of the beam 29 is connected to the central part of the base beam 27 by means of a universal ball 32.

For each cylinder 31, the end of its cylinder 33 is connected by a swiveling connection 34 to the surface laterally inside of an upright 26, and the end of its rod 35 is connected by a swivel link 36 to the laterally outer surface of the beam nearest longitudinal 30, near the beam 28.

The blade 14 is formed by a part main 37 and by two extension parts 38, each of these parts 37 and 38 presenting in side view a curved profile which turns its concavity towards the tractor 2. Parts 38 are located behind part 37 by compared to tractor 2.

The main part 37 extends laterally substantially over the entire width of the two half-screws 8, and the upper edge of its front face is fixed by via a transverse plate 39 on the surface lower of the beam 28 of the blade holder 15.

A hollow transverse guide rail 40 is fixed on the rear surface of the plate 39, under the beam 28 of the blade holder 15 and above the main part 37 of the blade.

The upper edges of the extension parts 38 are fitted with rollers (not shown) inserted in the guide rail 40, and thus allowing the parts to extension 38 to slide laterally with respect to the main part 37. The front surfaces of the parts 38 move a short distance behind the surface back of part 37.

The blade 14 is further adapted so that the lower edges of parts 37 and 38 are substantially at the same level with respect to surface 9 when the blade 14 is in the leveling position, as shown in solid line in Figure 2.

The side walls 114 are plates metallic, each defining a substantially plane vertical and longitudinal with respect to tractor 2. They are each carried by a beam 41 provided with rollers not shown. Each beam 41 is inserted into the beam 22, by a respective end thereof, for allow lateral sliding of the beams 41 and so the lateral displacement of the walls 114.

Each wall 114 is further connected to the frame 16 by means of a jack 42, the end of which rod 43 is fixed to the plate 114 and the end of the cylinder 44 at the rear outer surface of the beam 22.

The lower edge (in the figures) of each plate 114 is substantially rectilinear and is located short distance above the surface 9.

A guide slot 45 in an arc substantially centered on the ball 32 is provided at the back of each wall 114.

Guide members 46 carried by the laterally outer ends 47 of each part extension 38 cooperate with each slot 15 so that, on the one hand, each side plate 114 and the part corresponding extension 38 are secured in the lateral direction and, on the other hand, that each end 47 parts 38 is guided along the path defined by the corresponding slot 45.

The cylinders 31 make it possible to adjust the position of the blade 14, this position being entirely defined by the length of the cylinders 31 due to the presence of the ball joint 32, the rigidity of the blade holder 15, the connection fixed between the blade holder 15 and the main part 37, of the connection between the organs 46 carried by the ends 47 and walls 114, and bond sliding between parts 37 and 38 of the blade.

These jacks 31 allow, for example, move the blade 14 between a high retracted position and a low leveling position as shown in the FIG. 2 respectively in phantom and in solid line, and also tilt the blade 14 laterally while playing on the relative difference in length of the cylinders 31.

These jacks 31 also make it possible to adjust the transverse inclination of the blade 14.

The cylinders 42 allow to vary the lateral spacing of the plates 114 and the width of leveling of the blade 14, as shown in the figure 3.

In this figure, we have shown in solid lines the minimum spacing position of the side walls 114. In this position, the beams 41 are in abutment at the inside of the beam 22 and the extension parts 38 are retracted behind the main part 37. The laterally inner edges 48 of parts 38 are substantially in abutment. The lateral spacing of the walls 114 and the width of the blade 14 then corresponds to the nominal width of implementation of road materials of the finisher that we modified.

There is shown in phantom in Figure 3 the position of maximum separation of the walls 114, reached in increasing the length of the jacks 42. Each of the walls 114 involved in its movement the extension part 38 corresponding. The laterally inner edges 48 parts 38 are then separated from each other. The blade leveling width 14 increased by width of the sections of the sides 38 projecting from the side compared to part 37.

Of course, playing on the settings of the cylinders 42, you can choose the implementation width of road materials between the two extreme positions represented.

We will now describe next to the figure 1, the use of machine 1 for an operation of resetting to zero of the rolling surface 9 of a pavement.

As with a conventional finisher, machine 1 pushes, via a roller pusher 49 (Figure 1), a truck (not shown) which pours the road material 6 which is conveyed towards the rear of the machine 1 by the moving floor 7. This moving floor 7 regulates the flow of the road material supplying the half-screws 8 and the shaping device 3.

Half-screws 8 provide lateral distribution correct road material 6 in front of the blade leveling 14. The blade 14 ensures leveling transverse of road material 6 by scraping during movement of the machine, and the walls 114 ensure the lateral restraint of road material 6 during lateral distribution and leveling of the latter.

The position of the blade 14 has been adjusted, thanks to the cylinders 31, so as to obtain the height and the profile cross leveling desired.

The leveling width of the blade 14 has been adjusted by the cylinders 42 so as to correspond to the width of the surface 9 to be reprofiled to zero.

Machine 1 ensures in a single pass a satisfactory transverse leveling of road material 6.

Of course, the adjustment of the length of the tie rods 13 allows the level of the device 3 to be adjusted as best as possible relative to the surface 9.

The invention therefore provides a setting-up machine road material work well suited for resetting of a roadway to zero. This machine can be used for the implementation of any type of material road on any type of surface. In particular, the craft can be used to reprofile only a band longitudinal of a roadway.

Thanks to the presence of the receiving hopper 5, conveyor belt 7, half screws 8, walls 114 and the possibility of adjusting the position of the blade 14 and the spacing of the walls 114, it is possible to adapt the thickness of the coating created to the profile of the setting surface work, and thus to ensure, for example, the operation of reprofiling to zero in a single pass.

In addition, the device according to the invention allows to economically and quickly modify a finisher to provide such a device.

Finally, the shaping device according to the invention has a processing width of the material variable road. Thus, the machine equipped with such device can, on the one hand, adapt to different material processing widths road, and secondly, by lengthening so different the cylinders 42, compensate for the offset of device 3 relative to the path of the tractor 2.

According to a variant illustrated schematically in dashed broken long line in Figure 1, the tie rods 13 can be omitted, and rolling means 50, in particular two lateral tandems, each comprising a longitudinal carrying arm 51 fitted with a wheel front and rear wheel, can be attached and on the other side of the rear part of the support frame 16. The shaping device 3 is then, on the one hand, towed by the swinging arms 10 relative to the chassis 4 and, on the other hand, carried by these tandems, whose wheels are supported on the lateral edges of the surface of implementation, on both sides of the road material leveled by the blade 14. Such an arrangement makes it possible to limit the height variations of the blade 14, in the longitudinal direction, when processing the material road.

According to another variant not shown, the main part is split into several sections of main part articulated to tilt laterally independently, and thus obtain profiles of transverse polygonal leveling, for example on the roof. Means for adjusting the position of the blade then include means for adjusting the inclination side of the sections.

Claims (11)

Material processing machine (1) road, comprising, from front to back, means (5) for receiving a road material (6), means (7) for conveying the road material towards the rear of the vehicle, means (8) for lateral distribution of the material over an operating surface (9), and a device (3) for shaping road material, characterized in that the shaping device comprises a blade rigid transverse (14) for leveling the material road. Machine according to claim 1, characterized in what the shaping device includes means (17) height and tilt adjustment transverse of the blade with respect to the placing surface in use (9). Machine according to claim 2, characterized in that the blade (14) is mounted on a blade holder (15) articulated to a support frame (16) which is itself connected to the chassis of the machine, and in that at least one height and tilt adjustment cylinder (31) transverse of the blade connects the blade holder (15) to the frame support (16). A machine according to any of Claims 1 to 3, characterized in that the blade (14) is a blade with adjustable leveling width. Machine according to claim 4, characterized in that the blade (14) comprises a main part (37) and at least one extension part (38) which can slide laterally with respect to the main part 37. between a retracted position and at least one position increasing the leveling width of the blade (14). A machine according to any of Claims 1 to 5, characterized in that it comprises in addition to substantially vertical side walls (114) lateral material retention, extending longitudinally on either side of the blade (14) and means (8) for distributing the machine (1). Machine according to claim 6, characterized in that the lateral spacing of the side walls (114) is adjustable. Device according to claims 5 and 7 taken together, characterized in that at least one wall is mounted movable laterally, and in that the laterally outer ends (47) of the blade (14) are integral with the side walls (114) in the direction lateral. A machine according to any of Claims 1 to 8, characterized in that the blade (14) leveling has a forward curved profile of the craft. A machine according to any of claims 1 to 9, characterized in that the device shaping (3) includes rolling means (50). A machine according to any of claims 1 to 10, characterized in that the shaping device (3) is connected to the chassis (4) of the machine (1) by means of lateral arms (10), integral with the chassis (4) of the machine or articulated to this one.

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