FR3076824A1 - DEVICE FOR TRANSPORTING LOAD ON A MOTOR VEHICLE - Google Patents

Abstract

The invention relates to a load transport device for a motor vehicle, comprising a box and a support plate (20) equipped with a longitudinal guide rail (21) and a transverse guide rail (22), the box comprising on its lower face a first and a second series of lateral fastening studs opposed in pairs respectively relative to the median longitudinal plane and the median transverse plane of the box, each of the transverse and longitudinal rails being adapted to guide in translation respectively the first and second series of lateral attachment studs, to respective anchoring zones (211, 212, 221, 222) associated with a locking mechanism (213, 214, 223, 224) with a lockable lock between a holding position of the lateral fixation stud in the anchoring zone and a release situation of the lateral fixing stud of the anchoring zone.

Description

Load transport device on a motor vehicle

The present invention relates generally to a load transport device adapted to be mounted on a motor vehicle. It relates more particularly to a load transport device adapted to be mounted on a motor vehicle, comprising a transport box and a support plate for the box able to be mounted on a floor of a useful vehicle loading volume, the support plate being equipped with at least one longitudinal guide rail and the box being provided on its underside with guide means integral with the box capable of cooperating with the guide rail so as to allow longitudinal movement of the box on the support plate. It also relates to a motor vehicle equipped with such a load transport device.

Such a device is well known to a person skilled in the art, in particular by the example given in document US2656942. This document describes in fact such a device installed in a transport truck, which comprises a container adapted to slide longitudinally along longitudinal rails provided on the rear floor of a goods transport truck, so as to allow the container to be unloaded. towards the rear of the truck, the lower part of the container being additionally provided with deployable support legs provided with wheels, at the front and at the rear of the container, intended to extend to the ground in order to be able to support the container during the container unloading operation in the longitudinal direction.

However, a problem with this type of device is that it is only suitable for making it easier to load and unload the container into / from the useful vehicle loading space, in a longitudinal guide direction. In other words, the loading and unloading of the container requires being able to access from the rear of the vehicle while providing significant clearance in this area for unloading the vehicle from the rear, which is not necessarily always the case, in particular in urban areas where strong constraints exist in terms of adaptability of the road network to dedicated delivery spaces.

Thus, the specific context of road freight transport in the city, especially in the urban hypercentre and typically in the last-kilometer segment, has led to a transfer of deliveries to light commercial vehicles, more suited to the regulatory and spatial constraints linked to this context. However in this context, the efficiency and speed of loading and unloading of goods into / from such light commercial vehicles is essential to the performance of the supply chain as a whole, in particular to reduce the nuisance generated by deliveries of the last kilometer.

Also, an object of the invention is to provide a load transport device adapted to be mounted on a motor vehicle, in particular a light commercial vehicle, making it possible to optimize the delivery of goods in the city center.

To this end, the device of the invention, moreover in accordance with the generic definition given by the above preamble, is essentially characterized in that the support plate is equipped with at least one transverse guide rail intended to allow a transverse movement of the box on the support plate, the transverse rail and the longitudinal guide rail defining two guide paths for the movement of the box crossing perpendicularly, the guide means comprising at least a first series of two lateral fixing pads opposite by relative to the median longitudinal plane of the box and at least a second series of two opposite lateral fixing studs with respect to the median transverse plane of the box, each of the transverse and longitudinal rails being adapted to guide the first and second series of studs in translation respectively lateral fixing, up to respective anchoring zones of the studs of lateral fixing arranged in each of the transverse and longitudinal rails, each anchoring zone of a lateral fixing stud being associated with a lockable locking mechanism between at least one situation of retaining the lateral fixing stud in the zone d anchoring and a situation of release of the lateral fixing stud from the anchoring zone.

Thanks to this arrangement, the box can be moved both in the longitudinal direction and in the transverse direction, these directions of movement are understood with respect to the longitudinal direction of the vehicle on which the transport device is mounted. Thus, the loading / unloading of the box can be easily carried out from the rear of the vehicle thanks to the longitudinal guide of the box along the support plate fixed on the vehicle floor, and also from the side of the vehicle, thanks to the lateral guide of the box on the support plate. In addition, the lockable lockable mechanism of the box on the guide rails, cooperating with the fixing studs linked to the box, allows the box to be fixed and unlocked easily on the vehicle during loading and unloading of the box. This method of securing the box to the vehicle is particularly advantageous by its speed of implementation, in particular with regard to other conventionally used securing means such as straps for example, the use of which can be avoided by virtue of the 'invention. This fast lashing and undocking of the box is essential for the efficiency of the transport chain until the last kilometer.

Advantageously, the two guide paths are arranged on two separate parallel planes.

Preferably, the longitudinal guide rail is installed on the support plate by means of a stiffening support so as to overhang the transverse guide rail.

Advantageously, each anchoring zone of the longitudinal guide rail consists of an anchoring well extending perpendicularly under the longitudinal guide rail between a lower face of the longitudinal guide rail and the support plate.

Advantageously, the locking mechanism with a controllable lock of each anchoring zone of the longitudinal guide rail comprises a movable lock arranged under the longitudinal rail, a lock actuator mounted integral with the stiffener support, capable of moving the lock between a position external to the anchor well and a position engaged inside the anchor well in which the bolt is capable of exerting the retention of the lateral fixing stud engaged in the anchor well.

Advantageously, the lockable locking mechanism of each anchoring zone of the transverse guide rail comprises a movable lock, a base secured to the support plate, supporting a lock actuator able to move the lock between a position external to the transverse rail in view of the anchoring zone and a position engaged inside the anchoring zone in the transverse rail in which the lock is capable of exerting the retention of the lateral fixing stud engaged in the anchoring zone.

Preferably, the transverse rail is provided at each of its opposite ends with a lateral drain intended to facilitate the insertion of the lateral fixing studs of the first series of lateral fixing studs in the transverse rail during a lateral loading of the box on the support plate.

Preferably, the longitudinal rail is provided at its rear end with a drain intended to facilitate the insertion of the lateral fixing studs of the second series of lateral fixing studs in the longitudinal rail during a longitudinal loading of the box onto the support plate.

Advantageously, the device can comprise a support structure of the box comprising a frame surrounding the periphery of an upper part of the box, adapted to be secured to the box, this structure being supported by four telescopic lateral support legs with integrated jack placed at the four angles. of the box, one upper end of which is connected to the chassis and one lower end of which is fitted with a support wheel.

The invention also relates to a motor vehicle, characterized in that it comprises a load transport device according to any one of the preceding claims.

Other features and advantages of the invention will emerge on reading the description given below of a particular embodiment of the invention, given by way of indication but not limitation, with reference to the accompanying drawings in which:

- Figure 1 is a schematic representation of the transport device according to the invention in exploded view;

- Figure 2 is a schematic representation in isolated view of the support plate of the box intended to be mounted on a vehicle of the light commercial vehicle type, not shown;

- Figure 3 is a detail view of the support plate illustrated in Figure 2, illustrating the lockable lockable locking mechanisms associated with the respective anchoring zones of the box in the rails;

- Figure 4 illustrates a configuration of the transport device of the invention during a lateral loading / unloading operation of the box, either by the side of the vehicle (not shown);

- Figure 5 illustrates a configuration of the transport device of the invention during a longitudinal loading / unloading operation of the box, either from the rear of the vehicle (not shown).

The description which follows will be made with reference to the frame of reference of the vehicle on which it is intended to be mounted, in which the X axis designates the longitudinal direction of the vehicle oriented from front to back, the Y axis designates the transverse direction of the vehicle oriented to the right and the Z axis designates the vertical direction of the vehicle oriented upwards.

Subsequently, the terms "longitudinal", "transverse", "front", "rear", "left" and "right" are defined with respect to this vehicle benchmark.

The vehicle on which the load transport device of the invention is intended to be mounted is preferably a vehicle of the light commercial vehicle type, comprising a rear loading platform making it possible to transport a load, in particular in the context of urban deliveries. The load transport device of the invention allows easy and quick loading and unloading in and from this vehicle.

As illustrated in FIG. 1, the load transport device 1 comprises a box 10, intended to store the goods to be delivered. The box 10 is preferably a box of substantially rectangular parallelepiped shape. For example, it can have dimensions between 1.5m and 2m in length and between 0.8m and 1.5m in width and height.

The box 10 has a lower face 11 by which it is intended to be secured to the transport vehicle by means of a support plate for the box, itself fixed to the rear floor of the vehicle, as will be explained below. . To secure the box 10 to the vehicle, the lower face 11 of the box 10 is provided with fixing studs, intended to cooperate with specific means provided for this purpose on the support plate, which will also be described in detail below. More specifically, the lower face 11 of the box 10 comprises a first series of two lateral fixing studs 12 and 13, arranged aligned and opposite to each other with respect to a median longitudinal plane of the box 10 and a second series of two lateral fixing pads 14, 15, arranged aligned and opposite to each other with respect to a median transverse plane of the box 10. Subsequently, the two lateral fixing pads 12 and 13 will be called left fixing pads and straight and the two lateral fixing pads 14 and 15 will be called front and rear fixing pads.

As explained above, the box 10 is intended to be secured to the vehicle for its transport. To do this, the device 1 comprises a support plate 20, capable of being fixed, preferably removably, on the rear floor of the vehicle. This support plate 20 consists of a metal structure plate of generally rectangular shape, the dimensions of which substantially coincide with the dimensions of length and width of the box 10, as well as with the dimensions of length and width of the rear floor of loading of the vehicle on which it is mounted. As will now be described in more detail, the support plate 20 is equipped with means capable of cooperating with the fixing studs of the box 10 to ensure on the one hand, a longitudinal and transverse guide of the box and, on the other hand, locking and unlocking the box during loading and unloading of the box.

More specifically, the support plate 20 comprises guide rails 21 and 22, respectively longitudinal and transverse, as illustrated in more detail in FIG. 2. The longitudinal guide rail 21 extends over substantially the entire length of the support plate 20 preferably following the median longitudinal plane of the support plate. The transverse guide rail 22 extends for its part over substantially the entire width of the support plate 20, preferably following the median transverse plane of the support plate. Thus, the two guide rails 21 and 22 delimit two paths for guiding the movement of the box intersecting perpendicularly and arranged substantially along the two median planes respectively longitudinal and transverse of the support plate.

Each longitudinal guide rail 21 and transverse guide 22 consists of a hollow profile defining an inner groove in which can be made to slide the fixing studs of the box, respectively the front and rear fixing studs 14 and 15 for the longitudinal rail and the studs of left and right fixing 12 and 13 for the transverse rail.

Each fixing stud of the box 12-15 comprises a rod 120-150 projecting perpendicularly from the underside 11 of the box 12, terminated by a shoe 121-151 having a surface extending in a plane normal to the axis of the rod and intended to slide in the guide rails 21 and 22 of the support plate.

According to the embodiment illustrated in the figures, provision is preferably made for the two guide paths of the box defined by the longitudinal and transverse rails 21 and 22 to be arranged on two separate parallel planes. According to the exemplary embodiment, the longitudinal guide rail 21 is arranged in a plane situated above the plane in which the transverse guide rail 22 is located. This particular arrangement aims to facilitate the arrangement on the plate of the support plate. the means for locking and unlocking the fixing studs of the box, which will be described later.

According to this exemplary embodiment, the bottom wall 220 of the groove of the transverse guide rail 22 is fixed integrally directly on the support plate 20, while the longitudinal guide rail 21 is implanted on the support plate 20 by means of 'a stiffening support 210, raising the longitudinal guide rail 21, so as to overhang the transverse guide rail 22.

The longitudinal rail 21 extends in two parts 21a, 21b, on either side of the crossing zone of the two longitudinal and transverse rails, leaving an opening 23 between them, adapted to the passage of the left and right fixing pads of the box when they are made to slide in the transverse guide rail 22.

The longitudinal rail 21 is adapted to guide in translation the two front and rear lateral fixing studs of the box, when they are engaged in the longitudinal rail, up to respective front and rear anchoring zones 211 and 212, arranged at level of the respective front and rear ends of the longitudinal rail.

The longitudinal rail 21 can be provided at its rear end with a drain 24 intended to facilitate the insertion of the front and rear fixing studs of the box in the longitudinal rail 21 during a longitudinal loading of the box 10 on the support plate 20 , from the rear of the vehicle.

Each anchoring zone 211 and 212 is associated with its own locking mechanism, respectively 213 and 214, in the form of a lockable locking mechanism controllable between a situation of retaining the fixing stud in the anchoring zone and a situation of release of this fixing stud from said anchoring zone.

More specifically, each front and rear anchoring zone 211 and 212 of the longitudinal guide rail 21 consists of an anchoring well, of generally cylindrical shape, extending perpendicularly under the longitudinal guide rail 21 between the support plate 20 and a lower face of the longitudinal guide rail, ie the bottom wall of the groove of the longitudinal guide rail 21, into which the anchoring well opens.

The lockable lockable locking mechanism, 213, 214, associated with each anchoring well 211, 212 of the longitudinal guide rail 21, is preferably arranged under the longitudinal rail 21 at a notch 210a provided for this purpose in the stiffener support 210 of the longitudinal rail. More specifically, each locking mechanism with a front and rear controllable lock, respectively 213 and 214, comprises a mobile lock, respectively a front mobile lock 213a and a rear mobile lock 214a, and a corresponding lock actuator, respectively 213b, 214b, mounted. secured to the stiffening support 210, at a portion of the stiffening support adjoining the transverse rail 22, opposite the corresponding anchoring well. Each lock actuator, respectively 213b, 214b, for example of jack or worm type, is preferably electrically controllable to move the lock, respectively before 213a and rear 214a, in a direction parallel to the longitudinal rail, between a so-called unlocking position. where the lock is located outside the anchor well and a so-called locking position where the lock is engaged inside the anchor well, through an opening provided in the anchor well, according to the order applied to it. Each front lock 213a and rear lock 214a preferably has a fork configuration designed to grip the rod of the fixing stud above the shoe when the lock is engaged inside the anchoring well, so as to constitute a stop d 'stop for the pad of the fixing stud and thus exercise the retention of the fixing stud engaged in the anchoring well.

The transverse rail 22 is for its part adapted to guide in translation the two lateral fixing pads on the left and right of the box, when they are engaged in the transverse rail, to the respective left and right anchoring zones 221 and 222 , arranged at the respective left and right ends of the transverse rail 22.

The transverse rail 22 can be provided at each of its opposite ends with a lateral drain 25 intended to facilitate the insertion of the left and right fixing studs of the box 10 in the transverse rail 22 during a lateral loading of the box on the support plate from either side of the support plate.

The left and right anchoring zones 221 and 222 of the transverse rail 22 can also be provided with a drain 221a, 222a projecting above the transverse rail 22 at each anchoring zone 221 and 222, making it possible to facilitate the insertion of the left and right fixing studs into their respective anchoring zone in the transverse rail 22, when these left and right fixing studs are brought above these anchoring zones during longitudinal loading of the box, then engaged therein by lowering the box in the locked position, that is to say when the four fixing studs of the box are brought above their respective anchoring zone.

Each left and right anchoring zone 221 and 222 of the transverse rail 22 is associated with its own locking mechanism, respectively 223 and 224, also in the form of a locking mechanism with a lock that can be controlled between a situation retaining the fixing stud in the anchoring zone and a situation of release of this fixing stud from said anchoring zone.

The lockable locking mechanism of each left and right anchoring zone 221 and 222 of the transverse guide rail 22 comprises a movable lock in a direction of movement perpendicular to the transverse rail 22, respectively a left movable lock 223a and a movable lock right 224a. Each of these left and right locks 223a 223a is positioned opposite a respective opening made on a side wall of the transverse rail 22, allowing the movable lock to be engaged inside the corresponding anchoring zone in the rail transverse 22. To do this, the locking mechanism of each anchoring zone 221, 222 of the transverse rail 22 comprises a base, respectively 223b and 224b, mounted integral with the support plate 20, at a distance from said opening, so as to support a lock actuator, respectively 223c and 224c, for example of the jack or worm type, preferably electrically controllable to move the movable lock, respectively 223a and 224a, between an unlocking position, external to the transverse rail 22 and a locking position , engaged inside the corresponding anchoring zone, according to the electrical control applied to it. In this engaged, so-called locking position, the lock, which has a fork configuration designed to grip the rod of the fixing stud above the shoe when the fixing stud is brought into the anchoring zone, makes it possible to exercise the retention of the fixing stud engaged in the anchoring zone.

We will now describe in more detail the operation of the load transport device according to the embodiment described above, in a first operating configuration with reference to FIG. 4, concerning a lateral loading and unloading of the box 10 and in a second operating configuration with reference to FIG. 5, concerning a longitudinal loading and unloading of the box 10.

FIG. 4 therefore illustrates a configuration of lateral loading / unloading of the box 10 from the left side of the vehicle (not shown), but the operation is similar for lateral loading / unloading from the right side of the vehicle. During lateral loading, the box 10 is manipulated to bring its underside substantially up to the transverse rail of the support plate, then is moved in the transverse direction so as to allow the engagement of one then of the other of the pads. left and right side fastening fitted to the underside of the box in the transverse rail 22 of the support plate. The support plate 20 is advantageously equipped with front and rear side drains 26 and 27 disposed respectively at the two front and rear corners of the support plate 20. Each of these side drains is provided with at least one guide surface oriented in the transverse direction , intended to guide the box during its lateral loading. Thus, when the box 10 is loaded laterally, its opposite lateral faces, oriented parallel to the transverse loading direction, are received against the respective guide surfaces of the front and rear lateral drains 26, 27 arranged on the side by which the loading, along which the box is guided during its loading until the left and right fixing studs are housed in the transverse rail 22. The left and right fixing studs slide in the transverse rail 22 until their respective anchoring zone 221 and 222 formed in the transverse rail 22. In this position of the box, the front and rear fixing studs of the box are also received in their respective anchoring zone 211, 212 formed in the longitudinal rail 21 , the anchoring wells constituting these anchoring zones 211, 212 having vertical notches 211a, 212a opposite one with respect to the Other with respect to the longitudinal rail 21, adapted to allow the passage of the front and rear fixing studs of the box in a transverse direction of introduction (see FIG. 3).

In this position where the four fixing studs of the box, respectively left and right and front and rear, are housed in their respective anchoring zones of the transverse and longitudinal rails, the locking mechanism with controllable lock of each anchoring zone is controlled so as to move the corresponding movable lock in its locked position engaged inside the anchoring zone, where the fixing stud is blocked.

For lateral unloading of the box, the lockable locking mechanism of each rail anchoring zone is controlled so as to move the corresponding mobile lock in its unlocked position, corresponding to a disengaged position of the lock outside of the anchoring zone, thus freeing the fixing studs. The box can then be translated in the transverse direction, guided by the left and right fixing studs sliding inside the transverse rail 22.

We will now describe the operation of the load transport device of the invention, with reference to FIG. 5, concerning a longitudinal loading and unloading of the box 10.

During longitudinal loading, the box 10 is manipulated to bring its underside substantially up to the longitudinal rail 21 overhanging the transverse rail 22, then is moved in the longitudinal direction so as to allow the engagement of the front and rear lateral fixing pads equipping the underside of the box 10 in the longitudinal rail 2. To do this, the box can be guided by the two rear side drains 27 fitted to the support plate 20. Each rear side drains 27 is thus advantageously configured to also have a surface guide oriented in the longitudinal direction, intended to guide the box during its longitudinal loading. Thus, when the box 10 is loaded longitudinally, its opposite lateral faces, oriented parallel to the direction of longitudinal loading, are received against these respective longitudinal guide surfaces of the rear lateral drains 27 disposed at the rear of the support plate, along which the box can be guided during its longitudinal loading, until it comes into abutment against the respective transverse guide surfaces of the front side drains 26. In this position, the box is then lowered, leading to the engagement of each of the studs fixing the box, respectively front and rear and left and right, in its respective anchoring zone at the longitudinal and transverse rails.

The lockable lockable mechanism of each anchoring zone is then controlled so as to move the corresponding movable lock in its locking position engaged inside the anchoring zone, where the fixing stud is blocked.

For longitudinal unloading of the box, the lockable locking mechanism of each rail anchoring zone is controlled so as to move the corresponding movable lock in its unlocked position, corresponding to a disengaged position of the lock outside of the anchoring zone, thus freeing the fixing studs. The box is then moved up in the vertical direction until the pads of the front and rear side fixing pads are arranged so that they can slide longitudinally in the longitudinal rail, then the box is translated backwards, guided by the front and rear fixing studs inside the longitudinal rail.

The control of the lockable lockable locking mechanisms of each anchoring zone of the longitudinal and transverse rails can be carried out by delivering appropriate control signals to the actuators from a control module installed for example in the vehicle on which the load transport device.

During the lateral and longitudinal loading / unloading operations of the caisson, the handling of the caisson can be carried out manually or even by means of a forklift type handling vehicle. Indeed, the free space existing between the upper face of the support plate and the lower face of the box, due to the presence of the rails, advantageously allows the forks of such a vehicle to intervene from one or the on the other side, as well as from the rear.

According to a variant, the box can be manipulated by means of a support structure intended to be fixed to the box (not shown). The supporting structure may include an upper frame intended to surround the periphery of an upper part of the box, adapted to be secured to the box, this structure being supported by four lateral support feet, intended to be placed at the four corners of the box when this the latter is mounted inside the chassis. An upper end of each support leg is connected to the frame and the other lower end is provided with a support wheel movably mounted vertically in the support leg. The four lateral support feet each incorporate a controllable jack, capable of actuating the lower end carrying the support wheel of the corresponding support foot between a retracted position, as illustrated in FIG. 1, and a deployed position where the wheel d he support is moved vertically in a direction opposite to the chassis. Thus, the four lateral support feet constitute deployable telescopic feet thanks to the integrated controllable jacks making it possible to adjust the length of each of the feet independently. The chassis is equipped with means intended for removable attachment to the box, being for example in the form of a maneuverable hook arranged in the upper part of the chassis, intended to cooperate with a fastening hook arranged on an upper face of the box. so as to allow the box to be fixed and disconnected from the chassis.

Claims (10)

1. Device (1) for transporting a load adapted to be mounted on a motor vehicle, comprising a transport box (10) and a support plate (20) for the box able to be mounted on a floor with a useful loading volume of the vehicle, the support plate (20) being equipped with at least one longitudinal guide rail (21) and the box being provided on its lower face (11) with guide means integral with the body capable of cooperating with the longitudinal rail guide so as to allow a longitudinal movement of the box on the support plate, characterized in that the support plate is equipped with at least one transverse guide rail (22) intended to allow a transverse movement of the box (10) on the support plate (20), the transverse rail (22) and the longitudinal guide rail (21) delimiting two guide paths for the movement of the box crossing perpendicularly, the guide means comprising at least one p first series of two lateral fixing pads (12, 13) opposite with respect to the median longitudinal plane of the box and at least a second series of two lateral fixing studs (14, 15) opposite with respect to the median transverse plane of the box, each transverse and longitudinal rails being adapted to guide in translation respectively the first and second series of lateral fixing studs, up to respective anchoring zones (211, 212, 221, 222) of the lateral fixing studs arranged in each of transverse (22) and longitudinal (21) rails, each anchoring zone of a lateral fixing stud being associated with a locking mechanism (213, 214, 223, 224) with controllable bolt between at least one retaining situation of the lateral fixing stud in the anchoring zone and a situation in which the lateral fixing stud is released from the anchoring zone. 2. Device according to claim 1, characterized in that the two guide paths are arranged on two separate parallel planes. 3. Device according to claim 2, characterized in that the longitudinal guide rail (21) is located on the support plate (20) via a stiffening support (210) so as to overhang the transverse guide rail (22). 4. Device according to claim 3, characterized in that each anchoring zone (211, 212) of the longitudinal guide rail (21) consists of an anchoring well extending perpendicularly under the longitudinal guide rail between a lower face of the longitudinal guide rail and the support plate. 5. Device according to claim 4, characterized in that the locking mechanism (213, 214) with controllable latch of each anchoring zone of the longitudinal guide rail comprises a movable latch (213a, 214a) arranged under the longitudinal rail ( 21), an actuator (213b, 214b) of the latch mounted integral with the stiffening support (210), capable of moving the latch between a position external to the anchor well and a position engaged inside the anchor well in which the lock is capable of exerting the retention of the lateral fixing stud engaged in the anchoring well. 6. Device according to any one of the preceding claims, characterized in that the locking mechanism (223, 224) with controllable latch of each anchoring zone of the transverse guide rail comprises a movable latch (223a, 224a), a base (223b, 224b) integral with the support plate (20), supporting an actuator (223c, 224c) of the bolt capable of moving the bolt between a position external to the transverse rail opposite the anchoring zone and a position engaged in the inside the anchoring zone in the transverse rail in which the bolt is capable of exerting the retention of the lateral fixing stud engaged in the anchoring zone. 7. Device according to any one of the preceding claims, characterized in that the transverse rail (22) is provided at each of its opposite ends with a lateral drain (25) intended to facilitate the insertion of the lateral fixing pads ( 12, 13) of the first series of lateral fixing pads in the transverse rail (22) during a lateral loading of the box (10) on the support plate (20). 8. Device according to any one of the preceding claims, characterized in that the longitudinal rail (21) is provided at its rear end with a drain (24) intended to facilitate the insertion of the lateral fixing pads (14, 15 ) of the second series of lateral fixing studs in the longitudinal rail (21) during a longitudinal loading of the box on the support plate. 9. Device according to any one of the preceding claims, characterized in that it comprises a support structure of the box comprising a frame surrounding the periphery of an upper part of the box, adapted to be secured to the box, this structure being supported 5 by four telescopic lateral support legs with integrated jack placed at the four corners of the box, one upper end of which is connected to the chassis and one lower end of which is fitted with a support wheel. 10. Motor vehicle, characterized in that it comprises a load transport device (1) according to any one of the preceding claims.