AU2018200408B2

AU2018200408B2 - Gravel spreader for repairing or building a roadway

Info

Publication number: AU2018200408B2
Application number: AU2018200408A
Authority: AU
Inventors: Gilles Parage
Original assignee: Secmair
Current assignee: Secmair
Priority date: 2018-01-04
Filing date: 2018-01-18
Publication date: 2024-12-12
Anticipated expiration: 2038-01-18
Also published as: AU2018200408A1; FR3076301A1; FR3076301B1

Abstract

Gravel spreader for repairing or building a roadway DESCRIPTIVE ABSTRACT The invention relates to a gravel spreader for repairing and/or building a roadway, supporting a rear gravel storage hopper (2), a front gravel receiving hopper (3), a gravel transfer assembly (4) from the rear hopper (2) to the front hopper (3) 5 and a front gravel spreading assembly (5). The invention is characterized in that the transfer assembly (4) comprises a rectilinear gravel transfer belt (40) which is capable of extending at an angle on the chassis (6) and under the rear hopper (2) in an intermediate area (23) of its width as far as above a lateral area (31) located to the right (respectively to the left) in the 10 determined width of the front hopper (3), for transferring the gravel on the belt (40) in a rectilinear transfer direction (D) at an angle from the intermediate area (23) to the lateral area (31) of the front hopper (3). Figure 3 3/4 C141 C~-j LCC) C14 CNJ C14) LNN ooco C-0j

Description

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Gravel spreader for repairing or building a roadway

Technical Field The disclosure relates to a gravel spreader for repairing and/or building a roadway. A field of application of the gravel spreader relates to self-propelling machinery that must spread gravel on a roadway.

Background Gravel spreaders are known comprising a rear hopper for storage of gravel and spreading assembly located in front of a cabin, a rear conveyance system for moving gravel from a central opening located to the rear of the storage hopper along the rear width and a lateral conveyance system for moving gravel along a side of the machine and then into the spreading assembly. A disadvantage of gravel spreaders of this kind is that the mechanism transferring gravel from the rear forwards is heavy, complex and bulky. Another disadvantage is that the gravels, when they move from the rear conveyance system to the lateral conveyance system, fall in part onto the ground in an undesirable and uncontrolled way and are therefore wasted, whereas it is desirable to control spreading of gravel performed by the front spreading assembly. The result is higher consumption of gravel and uncontrolled spilling of gravel onto the ground. It may be desirable for an embodiment of the disclosure to provide a gravel spreader, which eliminates the disadvantages of the prior art.

Summary Disclosed in a first aspect is a gravel spreader for repairing and/or building a roadway, comprising a chassis, the chassis supporting: - a rear gravel storage hopper, having a first determined width, - a front gravel receiving hopper, having a second determined width, - a gravel transfer assembly for transferring the gravels from the rear gravel storage hopper to the front gravel receiving hopper,

- a front gravel spreading assembly for spreading gravels originating from the front gravel receiving hopper. According to an embodiment, the gravel transfer assembly comprises a rectilinear gravel transfer belt which is capable of extending obliquely on the chassis and under the rear gravel storage hopper in an intermediate area of the first determined width as far as above a lateral area to the left or respectively to the right in the second determined width of the front gravel receiving hopper, for transferring the gravels on the belt in a rectilinear transfer direction obliquely from the intermediate area of the first determined width of the rear gravel storage hopper to the lateral area of the front gravel receiving hopper. The rectilinear gravel transfer belt can be mounted on a support comprising a first section. The first section can be located at least in part under the rear gravel storage hopper. The support can comprise a second section hinged by at least one hinge axis relative to the first section. The second section and the rectilinear gravel transfer belt can be capable of taking and passing between: a first work position, in which the second section and the rectilinear gravel transfer belt extend in the extension of the first section in the rectilinear transfer direction obliquely and in front of the first section and which allows to transfer the gravels on the rectilinear gravel transfer belt in the rectilinear transfer direction obliquely from the intermediate area of the first determined width of the rear gravel storage hopper to the lateral area located to the left or respectively to the right in the second spreading width of the front gravel receiving hopper, and a third retracted position, in which the second section and the rectilinear gravel transfer belt do not extend in the extension of the first section in the rectilinear transfer direction obliquely and are raised upwards and/or rearwards relative to the first work position to leave free a space located in front of the first section. This may optimize the transfer of gravel, without leakages and without the need to undertake moving it from one conveyance system to another, by decreasing the weight and the cost of the gravel transfer assembly at the same time. According to an embodiment, the rectilinear gravel transfer belt is capable of extending at an angle under the rear gravel storage hopper from a first point located in the intermediate area of the first determined width to a second point, which is located in the intermediate area of the first determined width and which is located further forward than the first point and towards the left or respectively towards the right relative to the first point. According to an embodiment, the rectilinear gravel transfer belt extends at an angle under the rear gravel storage hopper from a first point located in the intermediate area of the first determined width to a second point, which is located in the intermediate area of the first determined width and which is located further forward than the first point and towards the left or respectively towards the right relative to the first point. According to an embodiment, the straight gravel transfer belt extends on a support comprising a first section located at least in part under the rear gravel storage hopper and a second section hinged by at least one hinge axis relative to the first section, the second section and the straight gravel transfer belt being capable of taking and passing between: - a first work position, in which the second section and the straight gravel transfer belt extend in the extension of the first section in the rectilinear transfer direction at an angle and overshoots towards the left or respectively towards the right relative to the chassis and which allows to transfer the gravels on the rectilinear gravel transfer belt in the rectilinear transfer direction at an angle from the intermediate area of the first determined width of the rear gravel storage hopper to the lateral area located to the left or respectively to the right in the second determined width of the front gravel receiving hopper, and - a second stowed position, in which the second section and the rectilinear gravel transfer belt do not extend in the extension of the first section in the rectilinear transfer direction at an angle and overshoot less towards the left or respectively towards the right relative to the chassis than in the first work position or do not overshoot the road gauge of the gravel spreader. According to an embodiment, the gravel spreader comprises a control cabin located in front of the rear gravel storage hopper and at least in part behind the front gravel receiving hopper and the front gravel spreading assembly, the rectilinear gravel transfer belt being capable of being located to the left or respectively to the right of the control cabin for transferring the gravels on the belt in the rectilinear transfer direction at an angle from the intermediate area of the first determined width of the rear gravel storage hopper to the lateral area located to the left or respectively to the right in the second determined width of the front gravel receiving hopper. According to an embodiment, the gravel spreader comprises a stowed area, which is located to the left or respectively to the right of the control cabin and above the chassis and which is provided for stowing the second section and a corresponding part of the rectilinear gravel transfer belt in the second stowed position, the second section and the rectilinear gravel transfer belt being located to the left or respectively to the right of the control cabin in the first work position and in the second stowed position. According to an embodiment, the rectilinear gravel transfer belt is mounted on a support comprising a first section located at least in part under the rear gravel storage hopper and a second section hinged by at least one hinge axis relative to the first section, the second section and the rectilinear gravel transfer belt being capable of taking and passing between: - a first work position, in which the second section and the rectilinear gravel transfer belt extend in the extension of the first section in the rectilinear transfer direction at an angle and in front of the first section and which allows to transfer the gravels on the rectilinear gravel transfer belt in the rectilinear transfer direction at an angle from the intermediate area of the first determined width of the rear gravel storage hopper to the lateral area located to the left or respectively to the right in the second spreading width of the front gravel receiving hopper, and - a third retracted position, in which the second section and the rectilinear gravel transfer belt do not extend in the extension of the first section in the rectilinear transfer direction at an angle and are raised upwards and/or rearwards relative to the first work position to leave free a space located in front of the first section. According to an embodiment, the gravel spreader comprises a control cabin located in front of the rear gravel storage hopper and at least in part behind the front gravel receiving hopper, the gravel transfer assembly and the front gravel spreading assembly, wherein the second section and the rectilinear gravel transfer belt leave free in the third retracted position the space, which is located in front of the first section and to the left or respectively to the right of the control cabin. According to an embodiment, the second section and the rectilinear gravel transfer belt leave free the stowed area in the third retracted position. According to an embodiment, the lateral area of the front gravel receiving hopper overshoots towards the left or respectively towards the right relative to the chassis and under the second section in the first work position, overshoots in the second stowed position less towards the left or respectively towards the right relative to the chassis than in the first work position or does not overshoot the road gauge of the gravel spreader, and is capable of passing between the first work position and the second stowed position. According to an embodiment, the rear gravel storage hopper comprises at least one lower opening, which is capable of letting through gravels and which extends at an angle above the rectilinear belt between a first point located in the intermediate area of the first determined width and a second point, which is located in the intermediate area of the first determined width and which is located further forward than the first point and towards the left or respectively towards the right relative to the first point. According to an embodiment, the rear gravel storage hopper comprises at least one lower opening, which is capable of letting through gravels and which extends at an angle above the rectilinear belt, going from a rear lower end of the rear gravel storage hopper to a front lower end of the rear gravel storage hopper, located towards the left or respectively towards the right relative to the rear lower end. According to an embodiment, the front gravel spreading assembly has a variable spreading width beyond a third width of the chassis or of a control cabin or of wheels and axles of the gravel spreader. According to an embodiment, the front gravel spreading assembly comprises two first and second movable parts for distribution of gravels, capable of being displaced respectively to the right and to the left of the third width to distribute gravels respectively to the right and to the left of the third width and/or in the third width. According to an embodiment, the gravel spreader comprises a single rectilinear belt for transfer of gravels at an angle.

Brief Description of Figures Embodiments of the gravel spreader will be better understood from the following description given solely by way of non-limiting example in reference to the appended drawings, in which: - figure 1 shows a partial schematic view in perspective of a gravel spreader according to an embodiment of the disclosure, - figure 2 shows a partial schematic plan view of a gravel spreader according to an embodiment of the disclosure, - figure 3 shows a schematic plan view of a gravel spreader according to an embodiment of the disclosure, - figure 4 shows a schematic view of the left side of a gravel spreader according to an embodiment of the disclosure.

Detailed Description In figures 1 to 4, the gravel spreader 1 for repairing and/or building a roadway comprising a chassis 6 to the rear of which is the rear hopper 2 to be filled with gravels. At the front, the chassis 6 supports a front gravel receiving hopper 3 and a front assembly 5 for spreading this gravel. The gravel spreader 1 can comprise wheels 61 for rolling on the roadway, rotatably mounted under the chassis 6. The gravel spreader 1 can be for example a self-propelled vehicle for moving on the roadway in a direction of travel from the rear forwards or in the reverse direction. The gravel spreader 1 is provided to carry out spreading as it advances. The gravel spreader 1 can be of the truck type, transporting the hopper 2. According to an embodiment, the chassis 6 supports a gravel transfer assembly 4 for transferring gravel from the rear gravel storage hopper 2 to the front gravel receiving hopper 3.

According to an embodiment, the gravel transfer assembly 4 comprises a straight or rectilinear gravel transfer belt 40, which is capable of extending at an angle (seen from the top) or diagonally over the chassis 6 and under the rear gravel storage hopper 2. The straight gravel transfer belt 40 extends in an intermediate area 23 of the first determined width Li located under the rear gravel storage hopper 2. The straight gravel transfer belt 40 is capable of extending as far as above a lateral area 31 located to the left (respectively to the right) in the second determined width L2 (shown in figure 3) of the front gravel receiving hopper 3, for transferring gravel on the belt 40 in a straight or rectilinear transfer direction D at an angle (seen from the top) from the intermediate area 23 located under the rear gravel storage hopper 2 to the lateral area 31 of the front gravel receiving hopper 3. The width is taken according to the transversal direction L shown in the figures, oriented from the right 11 of the gravel spreader to the left 12 of the gravel spreader. The intermediate area 23 is located between the right end 25 of the rear gravel storage hopper 2 and the left end 26 of the rear gravel storage hopper 2 and at a distance from them and can comprise a median area of the first determined width Li of the rear hopper 2 or the middle of the first determined width LI. A single straight transfer belt 40 (and a single endless band of the latter) can be provided for transferring at an angle (seen from the top) gravel coming from the intermediate area 23 of the rear hopper to a left side or respectively right side (lateral area 31) of the front hopper 3. This prevents loss of gravel during this transfer, with a simpler and lighter structure and having less bulk in the width of the gravel spreader. This produces a great gravel delivery rate, successively from the rear hopper 2 to the belt 40, to the front hopper 3, and to the spreading assembly 5 and towards the roadway, as shown by arrows F1, D, F2, F3 and F4 in figure 4. According to an embodiment, the chassis 6 supports a control cabin 7 located in front of the rear gravel storage hopper 2. This control cabin 7 is located by its rear part behind the front gravel receiving hopper 3 and the front gravel spreading assembly 5 and overhangs them by its upper part, which comprises a front window. This control cabin 7 houses the controllers at least for moving the gravel spreader 1, such as for example the steering wheel and the controllers of the engine for moving the gravel spreader 1 forwards and/or rearwards. In the following, a gravel spreader 1, whereof the lateral area 31 is located in the left part of the second determined width L2 of the front gravel receiving hopper 3 is described in reference to figures 1 to 4. This type of gravel spreader is intended for example for self-propelled machinery driving on the left side of the roadway to arrive at the work site, such as for example in some English countries where vehicles drive to the left of the road. Of course, the following is also valid for a self-propelled machine driving on the left side of the road to arrive at the work site, by replacing left by right hereinbelow. According to an embodiment, the straight gravel transfer belt 40 is capable of being located to the left of the control cabin 7 for transferring gravel on the belt 40 in the straight transfer direction D at an angle (seen from the top) from the intermediate area 23 of the first determined width LI of the rear gravel storage hopper 2 to the left lateral area 31 of the second determined width L2 of the front gravel receiving hopper 3. The cabin 7 can be for example of the split cabin type (for example over a part of its width occupied by the stowed area 8, for example over a third of its width to the left in the figures). According to an embodiment, as shown in figure 3, the straight gravel transfer belt 40 is capable of extending (for example by displacement of the latter or by being positioned permanently) or extends permanently at an angle under the rear hopper 2 from a first point 21 located in the intermediate area 23 of the first determined width to a second point 22. This second point 22 is likewise located in this intermediate area 23 and is located further forward than the first point 21 and towards the left relative to the first point 21. According to an embodiment, the rear gravel storage hopper 2 comprises one or more lower openings 24. Each opening 24 is capable of letting gravel through and extends at an angle (seen from the top) above the straight gravel transfer belt 40 between the first point and the second point 22 (and therefore for example forwards and towards the left in figure 3). In an embodiment, the lower opening(s) 24 of the rear hopper 2 extends at an angle (seen from the top) above the straight belt 40 and goes from a rear lower end 27 of the rear gravel storage hopper

2 to a front lower end 28 of the rear hopper 2. This front lower end 28 of the rear hopper 2 is located towards the left relative to the rear end 27 in figures 2 and 3. The opening 24 can be continuous between the ends 27 and 28 and be present under the whole length of the rear hopper 2. This ensures complete emptying of the rear hopper 2. The opening(s) 24 can be trapezoidal or rectangular and at an angle (seen from the top) above the belt 40. The rear hopper 2 can comprise at least two inclined flaps delimiting a section for passage of gravel tapering from top to bottom as far as the opening(s) 24. The rear lower end 27 can be located substantially in the middle of the first width Li of the rear hopper 2. According to an embodiment, the straight gravel transfer belt 40 comprises one or more first hinge axes 45 to be able to be deployed in a first work position 42a and to be stowed near the cabin 7 in a second stowed position 42b, by a lateral movement. According to an embodiment, the belt 40 is further equipped with an automatic tensioning system (for example hydraulic) which enables to move from the second stowed position 42b to the first work position 42a and vice versa. This tensioning system can be without adjustment. The first work position 42a (shown in figures 1 to 4) is adopted on a work site for transferring gravel from the rear hopper 2 to the front hopper 3 and to the spreading assembly 5 via the straight transfer belt 40 transferring this gravel, to discharge gravel by this spreading assembly 5 onto the roadway by moving the gravel spreader 1 forwards, so as to build or repair the roadway or a road surface. The second stowed position 42b (shown in figure 3) is adopted to guide the gravel spreader 1 on the work site by a traffic lane without spreading gravel and corresponds to a transport position. According to an embodiment, the straight gravel transfer belt 40 is movably mounted on a support 43 and comprises an endless band 44 which can be driven to move forwards and at an angle (seen from the top) in the straight transfer direction D for transferring gravel on the band 40 from the area 23 to the front hopper 3. According to an embodiment, the support 43 comprises a first section 41, whereof a rear part is located under the rear gravel storage hopper 2 and a front part overshoots in front of the rear hopper 2. The support 43 further comprises a second section 42, which is hinged by the first hinge axis 45 relative to the first section 41 so that it can move between one and the other of the first work position 42a and the second stowed position 42b. This first hinge axis 45 extends from top to bottom, close to the vertical. The belt can have a slight slope rising forwards from the rear, as is shown by way of example in figure 4, in which case the first hinge axis 45 is not strictly vertical. The second section 42 and the straight gravel transfer belt 40 are to the left of the cabin 7 in the first position 42a and in the second position 42b. According to an embodiment, in the first work position 42a, the part of the straight belt 40, located on the second section 42 is in the extension of the part of the straight belt 40 located on the first section 41 in the straight transfer direction D which is at an angle (seen from the top). In this first work position 42a, the straight belt 40 and the second section 42 overshoot towards the left above the chassis 6, as far as the front hopper 3. This offset towards the left of the belt 40 enables aligning of the belt 40 and maintains the tightness of the gravel (no gravel leaks). According to an embodiment, in the second stowed position 42b, the part of the straight belt 40, located on the second section 42 is not in the extension of the part of the straight belt 40 located on the first section 41 in the straight transfer direction D being at an angle and is folded back towards the chassis 6 (to the right in figure 3) relative to the first position 42a. In this way, in the second stowed position 42b, the belt 40 no longer projects above the chassis 6 or over a width less than in the first position 42a and does not overshoot the road gauge of the gravel spreader. According to an embodiment, the gravel spreader comprises a stowed area 8 which is located to the left of the cabin 7 and above the chassis 6 and in which the second section 42 and a corresponding part of the straight gravel transfer belt 40 are stowed in the second position 42b. According to an embodiment, the left lateral area 31 of the front gravel receiving hopper 3 overshoots towards the left relative to the chassis 6 and under the second section 42 in the first work position 31a of this area 31, which corresponds to the first work position 42a of the belt 40, as shown in figure 3. In the second stowed position 31b of this area 31, the lateral left area 31 of the front gravel receiving hopper 3 overshoots less towards the left relative to the chassis 6 than in the first position 31a or is located fully in the third width L3 of the chassis 6 or of the cabin or of the wheels 61 and axles 62 of the gravel spreader 1 by not exceeding the road gauge of the gravel spreader. The lateral left area 31 of the front gravel receiving hopper 3 or all of the front hopper 3 is capable of being displaced from its first work position 31a or 3a to its second stowed position 31b or 3b and vice versa. According to an embodiment, the straight gravel transfer belt 40 comprises one or more second axes of articulation 46 so that it can be put in the first work position 42a and/or in the second stowed position 42b and can be put in a third at least partially retracted position 42c (shown in figure 4), for example by the automatic tension system. The second hinge axis 46 can be provided for example behind the first hinge axis 45. In this case, an intermediate section 47 of the support 43 is located between the second hinge axis 46 and the first hinge axis 45 and connects the second front section 42 to the first rear section 41. This third retracted position 42c is adopted for example to enable intervention on the engine 72 of the truck or gravel spreader (in this case the control cabin 7 has to be tilted forwards around a front, lower and horizontal rotation axis of the cabin 7 on the chassis 2 to have it shift to a fourth position 71c for inclination of the cabin 7 towards the front (giving access to the engine 72), shown in broken lines in figure 1, from a fifth position 71 shown in figures 1 to 4, in which in the first and second positions the cabin 7 covers the engine 72 located on the chassis 2. In this third retracted position 42c, the second section 42 and the part of the straight belt 40 being located on this second section 42 do not extend in the extension of the first section 41 in the straight transfer direction D being at an angle. In this third position 42c, the second section 42 and the part of the straight belt 40 being located on this second section 42 are positioned upwards and/or rearwards relative to the first and/or second position 42a, 42b, to leave free a space located in front of the first section 41 and the stowed area 8. According to an embodiment, the front gravel spreading assembly 5 has a variable spreading width beyond the third width L3. For example, the front gravel spreading assembly 5 can comprise a first movable part 51 for distribution of gravel (or first extension) and a second movable part 52 for distribution of gravel (or second extension). These distribution parts 51, 52 are capable of being displaced respectively towards the right and towards the left of the third width L3 under the front gravel receiving hopper 3 to distribute gravel coming from this front hopper 3 respectively to the right and to the left of the third width L3 and/or in the third width L3. These distribution parts 51, 52 can be telescopic for example. According to an embodiment, the front gravel receiving hopper 3 comprises a first endless screw 32 extending in its second width L2 to distribute for example towards the right in figure 3 or as far as the central area of the second width L2 the gravel which has been discharged from the belt 40 in the lateral area 31, 31a of this front hopper 3. The first movable part 51 for distribution of gravel comprises a second endless screw 511 extending over its width to distribute the gravel discharged from the front gravel receiving hopper 3 towards the right and/or towards the left. The second movable part 52 for distribution of gravel comprises a third endless screw 521 extending over its width to distribute the gravel discharged from the front gravel receiving hopper 3 towards the right and/or towards the left. The rear hopper 2 can be detachable so that the truck can be used for other purposes. Of course, the embodiments, features, possibilities and examples hereinabove can be combined with each other or be selected independently of each other. In the claims which follow and in the preceding description of the gravel spreader, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the gravel spreader. It is to be understood that, if any prior art publication is referred to herein, such reference does not constitute an admission that the publication forms a part of the common general knowledge in the art, in Australia or any other country.

CLAIMS DISCLOSURE

1. A gravel spreader for repairing and/or building a roadway, comprising a chassis, the chassis supporting: - a rear gravel storage hopper, having a first determined width, - a front gravel receiving hopper, having a second determined width, - a gravel transfer assembly for transferring the gravels from the rear gravel storage hopper to the front gravel receiving hopper, - a front gravel spreading assembly for spreading gravels originating from the front gravel receiving hopper, the gravel transfer assembly comprising a rectilinear gravel transfer belt which is capable of extending obliquely on the chassis and under the rear gravel storage hopper in an intermediate area of the first determined width as far as above a lateral area to the left or respectively to the right in the second determined width of the front gravel receiving hopper, for transferring the gravels on the belt in a rectilinear transfer direction obliquely from the intermediate area of the first determined width of the rear gravel storage hopper to the lateral area of the front gravel receiving hopper, wherein, the rectilinear gravel transfer belt is mounted on a support comprising a first section located at least in part under the rear gravel storage hopper and a second section hinged by at least one hinge axis relative to the first section, the second section and the rectilinear gravel transfer belt being capable of taking and passing between: - a first work position, in which the second section and the rectilinear gravel transfer belt extend from the first section in the rectilinear transfer direction obliquely and in front of the first section and which allows to transfer the gravels on the rectilinear gravel transfer belt in the rectilinear transfer direction obliquely from the intermediate area of the first determined width of the rear gravel storage hopper to the lateral area located to the left or respectively to the right in the second spreading width of the front gravel receiving hopper, and

Claims

- a third retracted position, in which the second section and the rectilinear gravel transfer belt do not extend from of the first section in the rectilinear transfer direction obliquely and are raised upwards and/or rearwards relative to the first work position to leave free a space located in front of the first section.
2. The gravel spreader according to claim 1, wherein the rectilinear gravel transfer belt is capable of extending obliquely under the rear gravel storage hopper from a first point located in the intermediate area of the first determined width to a second point, which is located in the intermediate area of the first determined width and which is located further forward than the first point and towards the left or respectively towards the right relative to the first point.
3. The gravel spreader according to claim 1, wherein the rectilinear gravel transfer belt extends obliquely under the rear gravel storage hopper from a first point located in the intermediate area of the first determined width to a second point, which is located in the intermediate area of the first determined width and which is located further forward than the first point and towards the left or respectively towards the right relative to the first point.
4. The gravel spreader according to any one of the preceding claims, wherein the rectilinear gravel transfer belt extends on a support comprising a first section located at least in part under the rear gravel storage hopper and a second section hinged by at least one hinge axis relative to the first section, the second section and the rectilinear gravel transfer belt being capable of taking and passing between: - the first work position, in which the second section and the rectilinear gravel transfer belt extend from the first section in the rectilinear transfer direction obliquely and overshoot towards the left or respectively towards the right relative to the chassis and which allows to transfer the gravels on the rectilinear gravel transfer belt in the rectilinear transfer direction obliquely from the intermediate area of the first determined width of the rear gravel storage hopper to the lateral area located to the left or respectively to the right in the second determined width of the front gravel receiving hopper, and - a second stowed position, in which the second section and the rectilinear gravel transfer belt do not extend from the first section in the rectilinear transfer direction obliquely and overshoot less towards the left or respectively towards the right relative to the chassis than in the first work position or do not overshoot the road gauge of the gravel spreader.
5. The gravel spreader according to any one of the preceding claims, further comprising a control cabin located in front of the rear gravel storage hopper and at least in part behind the front gravel receiving hopper and the front gravel spreading assembly, the rectilinear gravel transfer belt being capable of being located to the left or respectively to the right of the control cabin for transferring the gravels on the belt in the rectilinear transfer direction obliquely from the intermediate area of the first determined width of the rear gravel storage hopper to the lateral area located to the left or respectively to the right in the second determined width of the front gravel receiving hopper.
6. The gravel spreader according to claims 4 and 5 taken together, further comprising a stowed area, which is located to the left or respectively to the right of the control cabin and above the chassis and which is provided for stowing the second section and a corresponding part of the rectilinear gravel transfer belt in the second stowed position, the second section and the rectilinear gravel transfer belt being located to the left or respectively to the right of the control cabin in the first work position and in the second stowed position.
7. The gravel spreader according to any one of the preceding claims 1 to 6, further comprising a control cabin located in front of the rear gravel storage hopper and at least in part behind the front gravel receiving hopper, the gravel transfer assembly and the front gravel spreading assembly, wherein the second section and the rectilinear gravel transfer belt leave free, in the third retracted position, the space, which is located in front of the first section and to the left or respectively to the right of the control cabin.
8. The gravel spreader according to claim 6 combined with claim 7, wherein the second section and the rectilinear gravel transfer belt leave free the stowed area in the third retracted position.
9. The gravel spreader according to any one of claims 4, 5, 6, 8, wherein the lateral area of the front gravel receiving hopper overshoots towards the left or respectively towards the right relative to the chassis and under the second section in the first work position, overshoots in the second stowed position less towards the left or respectively towards the right relative to the chassis than in the first work position or does not overshoot the road gauge of the gravel spreader, and is capable of passing between the first work position and the second stowed position.
10. The gravel spreader according to any one of the preceding claims, wherein the rear gravel storage hopper comprises at least one lower opening, which is capable of letting through gravels and which extends obliquely above the rectilinear belt between a first point located in the intermediate area of the first determined width and a second point, which is located in the intermediate area of the first determined width and which is located further forward than the first point and towards the left or respectively towards the right relative to the first point.
11. The gravel spreader according to any one of the preceding claims, wherein the rear gravel storage hopper comprises at least one lower opening, which is capable of letting through gravels and which extends obliquely above the rectilinear belt, going from a rear lower end of the rear gravel storage hopper to a front lower end of the rear gravel storage hopper, located towards the left or respectively towards the right relative to the rear lower end.
12. The gravel spreader according to any one of the preceding claims, wherein the front gravel spreading assembly has a variable spreading width beyond a third width of the chassis or of a control cabin or of wheels and axles of the gravel spreader.
13. The gravel spreader according to claim 12, wherein the front gravel spreading assembly comprises two first and second movable parts for distribution of gravels, capable of being displaced respectively to the right and to the left of the third width to distribute gravels respectively to the right and to the left of the third width and/or in the third width.
14. The gravel spreader according to any one of the preceding claims further comprising a single rectilinear belt for transfer of gravels obliquely.