PUSH BUCKET WITH A TRANSVERSELY SLIDING BOTTOM HATCH

Abstract

The pusher skip (1) for transporting bulk materials, and in particular asphalt, comprises a body (10) with a discharge opening (4), which is formed in the bottom (100a) of the body and near the rear end of the body, an external bottom hatch (5A) which is adapted to slide transversely between a closed position of the discharge opening (4) and at least one open position in which the discharge opening (4) is at least partially unobstructed and allows gravity discharge of the bulk materials contained in the body (10), and actuating means (7) which are adapted to slide the bottom hatch transversely between said closed position and said at least one open position. Fig. 7

Description

Title of the invention: PUSH BUCKET WITH A TRANSVERSELY SLIDING BOTTOM HATCH technical field

[0001] The present invention relates to the unloading of bulk materials, and in particular asphalt, transported in a horizontal unloading skip which is equipped with an ejection pusher. Previous art

[0002] For the transport and unloading of bulk materials, it is known to use a tipper, commonly referred to as a "horizontal discharge tipper" or "push tipper," which is usually equipped with a horizontally and longitudinally movable ejection pusher between the front and rear of the tipper. This ejection pusher has an ejection shield, which is actuated by at least one horizontal hydraulic cylinder, and which allows the bulk materials to be pushed towards the rear of the tipper, in order to unload them by gravity while keeping the tipper horizontal, that is to say, without the tipper tipping over.

[0003] Preferably, a pusher bucket is "semi-round, that is to say, it has a loading volume delimited by a semi-cylindrical bottom wall.

[0004] This type of skip is used more particularly and primarily in the field of public works for the transport and unloading of asphalt, in particular bituminous asphalt (a mixture of gravel, sand and a hydrocarbon binder such as bitumen) or for the transport and unloading of excavated materials, such as gravel, sand, rubble, stones...

[0005] Also known and described in European patent application EP3763568 is a semi-circular pusher bucket having a discharge opening in the bottom of the bucket and near the rear end of the bucket. This semi-circular pusher bucket has a sliding external bottom hatch, which is curved and has the same concavity as the bottom of the bucket. This hatch is actuated by a longitudinal cylinder, which is mounted under the bucket between the front of the bucket and the discharge opening. This cylinder allows the hatch to slide longitudinally against the bottom wall along the average longitudinal line of the bucket's bottom, between a closed position of the discharge opening and an open position in which the discharge opening is clear and allows gravity discharge of the bulk materials contained in the bucket.

[0006] The solution described in the above-mentioned European patent application EP3763568 has several drawbacks.

[0007] The longitudinal cylinder is difficult to access, as access is generally obstructed by the longitudinal members and cross members of the rolling chassis on which the pusher body is mounted, which complicates maintenance, repair, and / or replacement of the cylinder. This difficulty of accessing the cylinder is all the more significant when the pusher body is combined at the rear with an additional device, which notably allows for the transverse spreading of bulk materials and prevents access to the cylinder from the rear of the body, such as, for example, a so-called "paver" device that allows for the spreading, leveling, pre-compaction, and smoothing of bituminous asphalt.

[0008] It also happens that the cylinder is damaged by projections from the external environment of the skip, particularly during the unloading of bulk material. This damage to the cylinder is all the more significant and detrimental when the bulk material being unloaded is hot, and in particular when the bulk material is asphalt at a high temperature of at least 100°C and typically between 140°C and 195°C.

[0009] If the bulk material in the skip is hot, and particularly if the bulk material is asphalt maintained at a high temperature, when the bottom gate has slid longitudinally into the open position towards the front of the skip, it cools down upon contact with the ambient air. This cooling of the bottom gate is even more pronounced when the bottom gate, in the open position, is located in a cooler area of ​​the skip towards the front and beyond the longitudinal position of the pusher. When the bottom gate is returned to the closed position, its cooling can cause the bulk material above the gate to harden, eventually forming a crust that obstructs the discharge opening and requires, in a detrimental and risky manner, an operator to manually break this crust to facilitate the flow of the asphalt. Presentation of the invention

[0010] The main objective of the present invention is to propose a new technical solution for unloading a pusher skip, which overcomes all or part of the aforementioned disadvantages. Summary of the invention

[0011] The invention thus relates to a pusher skip for transporting bulk materials, comprising a body and an ejection pusher that is movable longitudinally between the front and rear of the body; the body has a discharge opening, which is made in the bottom of the body and near the rear end of the body; the skip has a sliding external bottom hatch and actuating means for sliding the bottom hatch between a position The discharge opening must be closed and have at least one open position in which the discharge opening is at least partially clear and allows for gravity discharge of the bulk materials contained in the container. The bottom hatch must be able to slide laterally, and the actuation means must be able to slide the bottom hatch laterally between said closed position and said at least one open position.

[0012] More specifically, the pusher body may include the following additional and optional features, each additional and optional feature being able to be combined with any of the other technical features of the pusher body: - The actuation means include a transverse actuator under the body. - The actuator includes a transverse cylinder, the body of which is fixed under the body, the rod of which is oriented transversely and the head of the rod of which is fixed to the bottom hatch. - The case is semi-circular. - The upper face of the bottom hatch is concave and has substantially the same curvature as the convex outer face of the bottom of the crate and the bottom hatch is able to slide transversely against the convex outer face of the bottom of the crate, between said closed position and said at least one open position. - The head of the cylinder rod and the cylinder body are articulated in rotation respectively around two axes of rotation which are longitudinal and preferably positioned in the same horizontal plane. - The pusher skip includes guide means and in which the bottom hatch is able to slide transversely between said closed position and said at least one open position by being guided between these guide means and the outer face of the bottom of the body. - The guiding means comprise two transverse curved guides spaced longitudinally apart. - The upper face of the bottom hatch is flat and the bottom hatch is able to slide laterally in a horizontal plane between said closed position and said at least one open position. - The pusher skip includes guide means; the bottom hatch is able to slide transversely by being guided between these guide means and the outer face of the bottom of the body. - The guiding means comprise two straight transverse slides spaced longitudinally apart. - The pusher bucket has two longitudinal and preferably rigid sealing elements, which are fixed to the outside face of the body on either side of the discharge opening. - The discharge opening is quadrangular and has a deflector in each corner. - The pusher skip includes a rear protective box, which is fixed against the outside face of the bottom of the body and inside which are housed the bottom hatch and at least part of the actuation means. - The protective housing includes a side access opening allowing lateral access to the actuation means, and preferably includes a removable or movable cover allowing said side access opening to be closed. - The protective housing includes a side access opening and a removable or movable cover, which is hollow and allows the said side access opening to be closed, and the actuation means are positioned through the said side access opening, and part of the actuation means, opposite the bottom hatch, is housed inside the cover when the latter closes the said side access opening. - The protective box is annular and the concave face of this protective box in contact with the case fits the convex outer face of the bottom of the case. - The annular protective box has a U-shaped section and the face of this protective box in contact with the crate is closed by the outer face of the bottom of the crate. - The protective box reinforces the rear rigidity of the body. - The pusher skip having a discharge hopper which is fixed under the body, so as not to obstruct the transverse sliding of the bottom hatch between said closed position and said at least one open position. - The discharge hopper passes vertically through the protective casing. - The pusher skip is specifically adapted and intended for transport of asphalt.

[0013] The invention also relates to a trailer or semi-trailer comprising a rolling chassis on which is mounted a pusher tipper as described above. Brief description of the figures

[0014] The features and advantages of the invention will become clearer upon reading the following detailed description of several embodiments of the invention, which detailed description is given by way of non-limiting and non-exhaustive example of the invention, and with reference to the accompanying drawings on which: - [Fig.1] The [Fig.1] is an isometric perspective overview of a pusher tipper mounted on the rolling chassis of a semi-trailer. - [Fig.2] Fig.2 is a partial isometric perspective view of the rear of an initial variant of a push-type tipper body whose sliding bottom hatch is curved. - [Fig. 3] [Fig. 3] is an isometric perspective view of the hatch curved bottom. - [Fig.4] The [Fig.4] is a rear view of the pusher bucket of the [Fig.2]. - [Fig.5] The [Fig.5] is a view from below of the pusher bucket of the [Fig.2]. - [Fig. 6] Fig. 6 is a longitudinal cross-sectional view of the pusher bucket in the vertical section plane VLVI of [Fig.4]. - [Fig. 7] [Fig. 7] is a cross-sectional view of the pusher bucket of the [Fig.2], whose curved bottom hatch is in the closed position of the discharge opening at the bottom of the skip. - [Fig. 8] Fig. 8 is a longitudinal cross-sectional view of the pusher bucket in the horizontal plane VIII-VIII of [Fig.7]. - [Fig. 9] Fig. 9 is a cross-sectional view of the pusher bucket of the [Fig.2], whose curved bottom hatch slid transversely so as to completely clear the discharge opening at the bottom of the skip. - [Fig. 10] The [Fig. 10] is a longitudinal cross-sectional view of the pusher bucket in the horizontal plane XX of the [Fig.9]. - [Fig. 11] The [Fig. 11] is a cross-sectional view of a second variant of the embodiment of a pusher skip, whose bottom hatch is straight and is in the position of closing the discharge opening at the bottom of the skip. - [Fig. 12] The [Fig. 12] is an isometric perspective view of the right bottom hatch. - [Fig. 13] The [Fig. 13] is a longitudinal cross-sectional view of the pusher bucket in the horizontal plane XIII-XIII of the [Fig.1 1]. - [Fig. 14] The [Fig. 14] is a cross-sectional view of said second variant of pusher skip embodiment, in which the right bottom hatch has slid transversely so as to completely clear the discharge opening at the bottom of the skip. - [Fig. 15] The [Fig. 15] is a longitudinal cross-sectional view of the pusher bucket in the horizontal XV-XV plane of the [Fig. 14]. Detailed description

[0015] Figure 1 shows a semi-circular pusher 1 mounted on the rolling chassis 2 of a semi-trailer adapted for front coupling to a tractor unit. In another embodiment, the pusher 1 can be mounted on the rolling chassis of a truck trailer.

[0016] In the accompanying figures, the longitudinal axis X defines the longitudinal direction of the pusher bucket and is oriented horizontally from the front to the rear of the bucket. The transverse axis Y, perpendicular to the longitudinal axis X, defines the transverse direction of the bucket. The vertical axis Z, perpendicular to the X and Y axes, defines the vertical direction of the bucket.

[0017] This pusher bucket 1 comprises a semi-circular loading box 10, preferably made of steel.

[0018] This semi-circular box 10 includes a wall 100 which forms a semicircle in cross-section, and which in this example is more particularly made up of a curved sheet metal.

[0019] The case 10 is closed at its rear end by a vertical rear wall 101.

[0020] In this particular example, the rear wall 101 constitutes a rear door, which has a transverse and horizontal pivot axis A, and whose opening and closing are usually controlled by jacks.

[0021] This pusher bucket 1 also includes an ejection pusher 3 having an ejection shield 30, which is mounted inside the body 10, which is movable in longitudinal translation between the front and the rear of the body 10. This ejection shield 30 is actuable by means of a horizontal hydraulic cylinder 31 positioned at the front of the bucket 1.

[0022] The curved wall 100, the rear wall 101 and the ejection shield 30 delimit a loading volume V intended to contain bulk materials.

[0023] The pusher bucket also includes a discharge opening 4, which is made in the bottom 100a of the body 10 and in the vicinity of the rear end of the body 10.

[0024] This discharge opening 4 is preferably centered transversely (Y axis) with respect to the casing 10.

[0025] In the variants shown in the accompanying figures, and without limiting the invention, this discharge opening is quadrangular. In another variant, the discharge opening 4 may have a completely different shape, in particular polygonal, circular, oval...

[0026] This discharge opening 4 can be closed by means of an external bottom hatch 5 adapted to slide transversely.

[0027] Moving the ejection shield 30 rearward allows the bulk materials contained in the loading volume V to be pushed towards the rear of the crate 10, so as to obtain gravity evacuation of the bulk materials by the rear of the crate 10, when the rear door 101 is open and / or by the discharge opening 4 when it is not closed by the bottom hatch 5.

[0028] Preferably, the pusher skip 1 is a TP (Public Works) skip which is suitable for transporting and unloading bulk materials such as bituminous coatings or excavated bulk materials (gravel, sand, rubble, stones ...).

[0029] Preferably, particularly when the pusher bucket 1 is specifically adapted for the transport of bituminous mixes which must be kept at a high temperature (generally between 140°C and 195°C), the bucket body 10 can be insulated in order to thermally insulate its loading volume V. Typically, this thermal insulation can for example be achieved by means of an external coating of insulating material.

[0030] In two particular embodiments described below solely as examples of embodiments, the sliding bottom hatch 5 of the invention can in particular be in two different forms, namely a curved form or a straight form.

[0031] Figures 2 to 10 illustrate a first variant of an embodiment of a pusher bucket 1 comprising a bottom hatch which is curved and which is referenced 5A on these figures in order to differentiate it from the straight hatch 5B of the second variant of the pusher bucket 1 of figures 11 to 15.

[0032] X “ variant - Bottom hatch 5A curved _ - [Fig.2] to [Fig. 10]

[0033] With reference to the particular embodiment shown in Figures 2 to 10, the hatch of base 5A is curved.

[0034] With reference to [Fig.3], this bottom hatch 5A has an upper face 50, which is intended to be oriented towards the convex outer face of the bottom 100a of the box 10, a lower face 51 and two connecting pieces 52 which are welded to the lower face 51 of the hatch 5A.

[0035] At least the upper face 50 of the hatch 5A is concave and has substantially the same curvature as the convex outer face of the bottom 100a of the box 10, so as to follow the curvature of the convex outer face of the bottom 100a of the box 10.

[0036] In this particular example, this bottom hatch 5A comprises a rigid, curved plate, for example made of steel

[0037] This curved bottom hatch 5A is able to slide transversely against the outer face of the bottom 100a of the box 10 by being actuated by a linear actuator 7, such as a cylinder and more preferably a double-acting cylinder.

[0038] More particularly, this bottom hatch 5A is slidably mounted against the outer face of the bottom 100a of the case 10, being supported and guided by two transverse curved guides 6A ([Fig.7], [Fig.8], [Fig.9]), which are fixed, for example, by being welded, near the bottom 100a of the crate 10, on either side of the discharge opening 4 and which are spaced apart from each other in the longitudinal direction X.

[0039] These two curved guides 6A have the same radius of curvature as the bottom hatch 5A and are oriented transversely and upwards, so as to form with the outer face of the bottom 100a of the case 10 two curved guide rails, in which the bottom hatch 5A can slide transversely against the outer face of the bottom 100a of the case 10.

[0040] The double-acting cylinder 7 is mounted under the body 10, positioned laterally on one side (right side in figures 7 to 10) and oriented horizontally and transversely.

[0041] More specifically, the head of the rod 7a of the cylinder 7 is fixed to the connecting parts 52 of the bottom hatch 5A, being articulated in rotation relative to these connecting parts 52 about a first axis of rotation RI parallel to the longitudinal direction X of the body. The body 7b of the cylinder is fixed below the body 10, being articulated in rotation, opposite the head of the rod 7a, about a second axis of rotation R2, which is parallel to the longitudinal direction X of the body and preferably in the same horizontal plane as the first axis of rotation RL

[0042] The cylinder 7 allows the bottom hatch 5A to be actuated by sliding it laterally against the curved outer face of the bottom 100a of the crate 10, between a closed position (Figures 7 and 8) in which it closes the discharge opening 4 and prevents the flow by gravity of bulk material through this discharge opening 4, and an open position (Figures 9 and 10) in which the discharge opening 4 is in this preferred example completely clear and allows a gravity evacuation of the bulk materials contained in the crate 10 of the skip 1.

[0043] During the movement from its closed position to its open position, the bottom hatch 5A slides transversely upwards on the side of the skip substantially against the outer face of the bottom 100a of the body 10 with a mechanical play just sufficient to allow the bottom hatch to slide.

[0044] The joints RI and R2 allow angular movement in a vertical plane ([Fig.9]) of the bottom hatch 5A relative to the rod 7a of the cylinder and of the body 7b of the cylinder relative to the casing 10 during the transverse sliding of the bottom hatch 5A.

[0045] The lateral positioning of the transverse cylinder 7 on a lateral side of the tipper advantageously allows easy access to the cylinder for maintenance and / or repair and / or replacement of the cylinder.

[0046] Advantageously also, when the container 10 of the skip 1 contains a hot bulk material, such as bituminous asphalt at a high temperature, and when the bottom hatch 5A is in its open position after having slid Transversely, hatch 5A remains positioned in a rear "hot" area of ​​the container in which the bulk material is located, which helps to reduce its cooling.

[0047] When the bottom hatch 5A is repositioned in the closed position, the risks of cooling and hardening of the bulk materials in contact with the upper face 50 of the hatch 5A are advantageously reduced, and the risks of the formation of a crust of bulk materials in the discharge opening 4 are reduced, which would disrupt, or even prevent, the gravity discharge of the bulk materials.

[0048] Preferably, in the area opposite the bottom hatch 5A, the outer face of the bottom 100a of the box 10 is not covered with thermal insulation, which contributes to maintaining the temperature of the bottom hatch in the open position.

[0049] Preferably, the tipper body 1 comprises a rear protective box 8 which is annular. This annular protective box 8 is positioned against the outer face of the bottom 100a of the body 10 and is welded to this outer face. The face of this box 8 in contact with the body 10 is concave and conforms to the convex outer face of the bottom 100a of the body 10.

[0050] This annular protective box 8 further has a U-shaped section in a longitudinal plane of the skip ([Fig.6]) and the face of this protective box 8 which is in contact with the body 10 is closed by the outer face of the bottom 100a of the body 10.

[0051] In the illustrated example, this rear protective box 8 consists of three welded box sections: a central box section 8a, and two side box sections 8b and 8c. The two side box sections 8b and 8c contribute to the rear rigidity of the body, and form a complete reinforcing box with the central section 8a.

[0052] The rear protective housing 8 may advantageously, but not necessarily, be insulated.

[0053] Regardless of its position, the bottom hatch 5A is housed inside this box 8, in particular inside the central part 8a, which allows it to be isolated and protected from the external environment of the skip, and which contributes where appropriate to its thermal insulation.

[0054] The cylinder 7 is housed partly inside the central box part 8a and the lateral box part 8b.

[0055] The side box part 8b has a side access opening 9a ([Fig.9]) which can be closed by a hollow cover 9b.

[0056] In this particular example, the cylinder 7 passes through this lateral access opening 9a and a part 7c of the cylinder body 7b, opposite the head of the rod 7a, is housed inside this hollow cover 9b, the remaining part of the cylinder being housed in the box 8.

[0057] This cover 9b is for example removable and, when removed, allows easy and quick access to the cylinder 7.

[0058] In another embodiment, the cover 9b can be fixed in a non-removable and movable manner between a closed position of the access opening 9a (position shown in Figures 7 and 9) and an open position in which the access opening 9a is unobstructed. This cover 9a can, for example, be pivoted to allow access to the cylinder 7.

[0059] The rear protective box 8 protects the cylinder 7 and prevents it from being damaged by projections from the external environment of the skip 1, and in particular by projections of bulk materials from under the skip 1.

[0060] This protective box 8 also makes it possible to isolate the bottom hatch 5A from the outside ambient air, which limits its cooling by the ambient air when the bulk material in the box 10 is at a high temperature, such as for example a bituminous coating.

[0061] Preferably, the skip is equipped with a discharge hopper 11 which is fixed under the body 10, for example by welding, and is aligned vertically with the discharge opening 4.

[0062] This hopper 11 passes through the central box part 8a of the rear protective box 8 and allows the flow of bulk materials through the rear protective box 8 between the discharge opening 4 and the underside of the rear protective box 8.

[0063] More particularly, at least one part 1 of the discharge hopper 11 ([Fig.7]) is positioned below the path of the bottom hatch 5A, so as not to obstruct the transverse sliding of the bottom hatch.

[0064] The hopper 11 also has an opening 11b ([Fig.7] and [Fig.9]) which allows the passage of the rod 7a of the cylinder 7 and the connecting parts 52 of the bottom hatch 5A.

[0065] In the particular case where the skip 1 is used to unload a bituminous mixture, especially during the construction of road surfacing or similar, an additional device, commonly referred to as a "finisher", can be associated with this unloading hopper 11 and allows the spreading, leveling, pre-compaction and smoothing of this mixture.

[0066] 2 — variant - Bottom hatch 5B right _ ^[Fig. 11 ] to [Fig. 15]

[0067] The second particular embodiment of Figures 11 to 15 differs from the first embodiment described above in that: - The bottom hatch 5B is straight, at least its upper face 50 being flat; in this particular example, this bottom hatch 5B comprises a rigid and straight plate, for example made of steel. - The bottom hatch 5B is able to slide transversely and in a horizontal plane between a closed position shown in Figures 11 and 13 and an open position shown in Figures 14 and 15, and is actuated by the transverse cylinder 7.

[0068] This hatch 5B is guided and slides in two straight, transverse guides 6B, which are horizontal and spaced longitudinally apart, and which are fixed under the body 10 on either side and near the discharge opening 4.

[0069] More particularly, in order to compensate for the difference in curvature between the bottom 100a of the casing 10 and the bottom hatch 5B, the casing 10 is provided with longitudinal sealing elements 12, in the form of rigid longitudinal rings (oriented parallel to the longitudinal direction X), welded to the outer face of the bottom 100a, on either side of the discharge opening 4 and spaced apart from each other in the transverse direction Y.

[0070] The crate 10 is also equipped with deflectors 13 ([Fig. 15]), which help to reduce the risk of loose materials accumulating and catching on the bottom hatch 5B in the corners between the discharge opening 4 and the bottom hatch 5B.

[0071] In the context of the invention, regardless of the embodiment variant, the cylinder 7 can be replaced by any type of actuator allowing the bottom hatch 5A, 5B to slide transversely.

[0072] Alternatively, the means for actuation of the bottom hatch may allow manual actuation of the bottom hatch.

[0073] In another embodiment, the bottom hatch and its actuation means can be designed so that in the open position of the bottom hatch, the discharge opening 4 is not completely clear, a part of the bottom hatch being able to be positioned opposite this discharge opening while allowing the evacuation by gravity of the bulk materials.

[0074] In another embodiment, the bottom hatch and its actuation means can be designed so that the bottom hatch can also slide and be positioned in one or more intermediate positions between the closed position and the fully open position of the attached figures.

Claims

Demands

1. Pusher bucket (1) for the transport of bulk materials, comprising a body (10) and an ejection pusher (30) which is movable longitudinally between the front and the rear of the body (10), which body (10) has a discharge opening (4), which is made in the bottom (100a) of the body and in the vicinity of the rear end of the body, which bucket has a sliding external bottom hatch and actuating means for sliding the bottom hatch between a closed position of the discharge opening (4) and at least one open position in which the discharge opening (4) is at least partially clear and allows gravity discharge of the bulk materials contained in the body (10), characterized in that the bottom hatch (5A;5B) is capable of sliding transversely and the actuation means are capable of sliding the bottom hatch transversely between said closed position and said at least one open position.;

2. Pusher skip according to claim 1, wherein the actuation means comprise a transverse actuator under the body (10).

3. Pusher skip according to claim 1, wherein the actuator comprises a transverse cylinder (7), the body (7b) of which is fixed under the body, the rod (7a) of which is oriented transversely and the head of the rod (7a) of which is fixed to the bottom hatch (5).

4. Pusher bucket according to any one of claims 1 to 3, wherein the body (10) is semi-circular.

5. Pusher bucket according to claim 4, wherein the upper face (50) of the bottom hatch (5A) is concave and has substantially the same curvature as the convex outer face of the bottom (100a) of the body (10) and wherein the bottom hatch (5A) is able to slide transversely against the convex outer face of the bottom (100a) of the body (10), between said closed position and said at least one open position.

6. Pusher bucket according to claims 3 and 5, wherein the head of the rod (7a) of the cylinder and the body (7b) of the cylinder are articulated in rotation respectively about two axes of rotation (RI; R2) which are longitudinal and preferably positioned in the same horizontal plane.

7. Pusher skip according to any one of claims 5 or 6, comprising guide means (6A) and wherein the bottom hatch (5A) is able to slide transversely between said closed position and said at least one open position by being guided between these guide means (6A) and the outer face of the bottom (100a) of the body (10).

8. Pusher bucket according to claim 7, wherein the guiding means (6A) comprise two transverse curved guides spaced longitudinally apart from each other.

9. Pusher bucket according to any one of claims 1 to 4, wherein the upper face (50) of the bottom hatch (5B) is flat and the bottom hatch (5B) is able to slide laterally in a horizontal plane between said closed position and said at least one open position.

10. Pusher skip according to claim 9, comprising guide means (6B) and in which the bottom hatch (5B) is able to slide transversely while being guided between these guide means (6B) and the outer face of the bottom (100a) of the body (10).

11. Pusher bucket according to claim 10, wherein the guiding means (6A) comprise two straight transverse slides spaced longitudinally apart from each other.

12. Pusher skip according to any one of claims 9 to 11, comprising two longitudinal sealing elements (12) and preferably rigid, which are fixed to the outer face of the body (10) on either side of the discharge opening (4).

13. Pusher bucket according to any one of claims 9 to 12, wherein the discharge opening (4) is quadrangular and has a deflector (13) in each corner.

14. Pusher skip according to any one of claims 1 to 13, comprising a rear protective box (8), which is fixed against the outer face of the bottom (100a) of the body (10) and inside which are housed the bottom hatch (5A; 5B) and at least part of the actuation means.

15. Pusher skip according to claim 14, wherein the protective housing (8) has a lateral access opening (9a) allowing lateral access to the actuation means, and preference includes a removable or movable cover (9b) allowing said side access opening (9a) to be closed.

16. Pusher skip according to claim 15, wherein the protective casing (8) has a side access opening (9a) and a removable or movable hood (9b), which is hollow and allows said side access opening (9a) to be closed, and wherein the actuating means are positioned through said side access opening (9a), and a part (7c) of the actuating means, opposite the bottom hatch, is housed inside the hood (9b) when the latter closes said side access opening (9a).

17. Pusher skip according to any one of claims 14 to 16, wherein the protective box (8) is annular and the concave face of this protective box (8) in contact with the body (10) fits the convex outer face of the bottom (100a) of the body (10).

18. Pusher bucket according to claim 17, wherein the annular protective box (8) has a U-shaped cross-section and the face of this protective box (8) in contact with the body (10) is closed by the outer face of the bottom (100a) of the body (10).

19. Pusher skip according to any one of claims 1 to 18, comprising a discharge hopper (11) which is fixed under the body (10), so as not to obstruct the transverse sliding of the bottom hatch between said closed position and said at least one open position.

20. Pusher bucket according to claim 19 and any one of claims 14 to 18 in which the discharge hopper (11) passes vertically through the protective box (8).

21. Pusher skip according to any one of claims 1 to 20, adapted and intended for the transport of asphalt.

22. Trailer or semi-trailer comprising a rolling chassis (2) on which is mounted a pusher tipper (1) according to any one of claims 1 to 21.

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