WO2008155471A1

WO2008155471A1 - Equipment attachable to the chassis of a commercial vehicle for handling a load-carrying part

Info

Publication number: WO2008155471A1
Application number: PCT/FR2007/002107
Authority: WO
Inventors: Jean-Patrick Maysonnave
Original assignee: Cousin S.A.S
Priority date: 2007-06-19
Filing date: 2007-12-19
Publication date: 2008-12-24

Abstract

The equipment comprises a subframe (10) and an intermediate structure S composed of a supporting arm (20) and a slider (70). The supporting arm is connected to the subframe (10) both by a rear transverse pivot (16) and by a hydraulic cylinder (11), while the slider (70) is able to slide translationally longitudinally inside the supporting arm (20) and is connected to control means (90) suitable for moving it in both directions. This equipment also includes hook means (52) able to act in conjunction with complementary means (95) carried by each load-carrying part (98), such as a dropside bed or tipper. According to the invention, the hook means (52) are carried by the uprights of a jib (40) which is movable translationally over the intermediate structure S between a rear pickup position, in which said hook means (52) act in conjunction with the means (95) formed on the cradle jib (97) of the load-carrying part (98) which is to be picked up, and a forward retaining position in which these means (52) help to retain the load-carrying part (98) on the vehicle.

Description

Reportable equipment on the chassis of a utility vehicle for handling a load bearing member.

The invention relates to the technical field of handling a load-bearing element, such as a tray or bucket that can support or contain a load, between a waiting position, in which the element rests on the ground, and a position in which the element rests on the chassis of a utility vehicle.

This technical sector comprises several devices, the best known of which is the so-called "multi-skip". It implements a gantry whose side arms are articulated at their base around a transverse axis and are connected to hydraulic actuators. The arms carry at their free ends lifting chains cooperating with hooking means arranged laterally to each of the buckets. This device moves each bucket parallel to itself, but has drawbacks, the most visible is the reduction of the width of the bucket. In fact, in order for the vehicle with its handling equipment to fit into the road gauge, despite the presence of the arms, it is necessary to deduce from the width of the standard skips, the width of the two lateral arms and, consequently, reduce the width each bucket and its storage capacity.

Another disadvantage results from the transmission to the vehicle of the action and reaction forces and their decomposition during the lifting of the load carrying element, during the displacement of its front end between its departure from the ground and its passage over the 'rear axle. Various solutions have been considered to remedy this. One of them is to bend the end of each arm to reduce the lever arm when the arms are the most overhanging. Again, it turns out that, when lifting heavy loads, the resisting torque exerted by the vehicle mass in front of its rear axle, may be insufficient to prevent vehicle pitching, which requires to provide anti-pitching devices complex and expensive.

To remedy these drawbacks, the document FR2763035, in the name of the inventor, proposes another solution according to which the load carrying element, on the one hand, is subjected to another kinematics, pulling it and tilting it on the chassis, and on the other hand, is handled by efforts exerted in the longitudinal median plane of this element and under it, which avoids having to reduce its width and its ability to receive loads.

More specifically, this reportable equipment comprises: a false frame adapted to rest and to be connected to the chassis of the vehicle, - an intermediate structure constituted by a support arm, which is connected to the subframe, on the one hand, by a rear transverse articulation and, on the other hand, by at least one hydraulic jack ensuring its pivoting between a transport position, in which it is substantially horizontal above the frame, and a working position, in which it forms an angle with respect to this false frame, - a slide slidably mounted in longitudinal translation in the support arm and connected to operating means able to move it in two directions between two extreme positions, namely, a transport position, in which it is fully retracted, and a gripping position, in which it is in maximum outward extension, with its posterior end at ground level, and under the por you charge, - At the rear end of the slide, hooking means adapted to cooperate with complementary means reported on each of the load-bearing elements,

and at least one discharge valve disposed on the hydraulic circuit of the cylinders controlling the movements of the support arm.

To bring a load-carrying element, such as a skip, onto the vehicle, the articulated support arm is pivoted upwards and the slider is brought into extended position, until its attachment means meet those which comprises the bucket and which are arranged at the bottom of its median anterior part. From this attachment, the movement of the slider is reversed to pull the bucket towards the chassis of the vehicle.

During this first phase, the front of the bucket is lifted and it tilts longitudinally relative to the horizontal at an angle which depends, on the one hand, on the vertical position of the top of the chassis of the vehicle, and more precisely the position of the rollers formed at the rear end of this frame to guide in translation the bottom of the bucket, and secondly the vertical position of the hooking means arranged on the load carrying member. In this phase, the entire mass of the load-bearing element is applied to the outside of the vehicle and generates, on the rear of the chassis and by pressing on the rollers, a lifting torque which tends to rotate the Support arm up and back and lift the front of the vehicle by pivoting its chassis around its axle or rear axles. It is to limit the moment value of the forces generating the pitching that the end of the slider is engaged under the load bearing element and communicates to this element a force which, antagonistic to the gravity, generates a time of anticrabbing deducing previously defined pitching torque.

Simultaneously, as soon as the relief valve detects, by measurement of the pressure in the actuating cylinders of the support arm, that the moment of rotation is greater than the resisting moment opposing the pitching, this valve puts the hydraulic circuit to the discharge to cause, by the tilting of the support arm on the front, a decrease in the value of the forces generating the moment of pitching.

The control by the discharge valve ceases as soon as the mass of the load carrying element is distributed in two forces on either side of the transverse median plane passing through the axle, and that the force exerted on the front part becomes equal and then greater than that exerted on the rear part Such equipment, increases the load capacity of the load bearing element and allows to control, in the majority of cases, the movements of removal or recovery of said element, to limit the effects of pitching on the vehicle, but still has some disadvantages.

One of these disadvantages is structural and concerns the load bearing elements. Indeed, in order to cooperate with the hooking means of the slider, those of the load carrying member must be specific, which prohibits the use of the equipment with other load bearing element and in particular with those comprising, on their front part, a cradle constituted by two vertical uprights connected by a horizontal axis, denominated handle of cradle. This disadvantage is all the more important as there are many trays and skips of the aforementioned type Another disadvantage is functional and concerns the kinematics of loading and unloading temporarily giving a high inclination to the load-bearing element, because of the height of the tilting point on the chassis. This has the effect, on the one hand, to promote the movement of the load in the load bearing element, thereby limiting applications and, on the other hand and in the presence of heavy loads, to allow less controlled vehicle wheelies. .

The object of the invention is to overcome these drawbacks by providing a handling equipment which, based on the inventor's previous work and in particular on the device previously described, with articulated support arm carrying a slide, allows use standard load bearing members, while limiting the inclination of the element during its loading and unloading movements, and preventing vehicle pitching without resorting to complex anti-jamming devices.

It is pointed out that in the remainder of the description and the claims, the expression "load-carrying member" designates a tray or a skip equipped with an anterior tibble bracket and comprising two spaced vertical uprights carrying between them a means of attachment to the hook of a handling device.

In the equipment according to the invention, the attachment means are carried by a bracket movable in translation relative to the intermediate structure, between a rear gripping position, in which the said attachment means cooperate with those provided on the gantry bracket of the load carrier element to be removed, and a front position of restraint, wherein these means participate in maintaining the load carrier element on the vehicle.

Thanks to this arrangement, the attachment means of the equipment are above the intermediate structure "support arm-slider" and can be either at its front end to retain the load carrier element on the vehicle, or at its end rear to be able, thanks to the inclination of the support arm, come to the vertical level of the hooking means of the cradle to bind to them.

In a first embodiment, the stem is slidably mounted on the support arm and is connected to means capable of moving longitudinally, in both directions and over the entire length of the arm, these means being independent of those moving the slide .

Thus, the bracket can be moved independently of the slider and in the opposite direction, for example in the drawing phase of the load bearing member on the support arm while the slider is extended under said element to communicate a force to the top having an anticlocking function.

Preferably, the attachment means carried by the bracket include a hook protruding from the free end of a lever articulated on the uprights of the bracket and the other end of which is connected to operating means, said means being able to pivoting the lever between an erasure position, in which it is folded against the gallows, and a loading position, in which it protrudes rearwardly from the gallows.

The articulated arm on the stem makes it possible to grasp the handle of the load bearing element, while the stem at the end of the back stroke is above this handle. In a second embodiment, the bracket is slidably mounted on the slide, with the possibility of displacement in both directions and over its entire length, and is connected to means capable of moving longitudinally, these means being independent of those moving the slide. Advantageously and with this embodiment, the attachment means carried by the bracket include a fixed hook protruding from the top of the uprights of the bracket and whose opening is turned forward, said hook being brought to the level of means for hooking the load bearing member by moving the slider combined with the inclination of the support arm. With this arrangement, when the intermediate structure, formed by the support arm and the slider, is brought into the loading position, the slider is moved rearwardly while the support arm is straightened and the stem is brought to the end. back of this slider. Thanks to this combination of movements the hook of the movable bracket comes directly to the level of the handle of cradle, without it being necessary to arrange it on an intermediate lever whose mechanism of maneuver complicates and outbid the equipment.

In a third embodiment, the gallows is composed of:

a support leg whose upper end carries the hooking means co-operating with those of the cradle of a load bearing element and whose lower end is provided with at least one roller of transverse axis, which can to be moved on a sole slidably mounted on the slider,

- And a lever whose lower end is articulated about a transverse axis on the front end of the sole, while its upper end is articulated on the support leg forming a deformable compass with the part bottom of it.

Thanks to its structure and its articlations, this stem makes it possible to reduce the leverage arms and the moments resistant with respect to the axle and, consequently, to reduce the upset torque tending to raise the front of the vehicle.

In this embodiment, the movement of the bracket on the slide can be provided either by specific means, such as cylinder, chains and pinions, or using the only drive means of the slide.

In this latter embodiment, the slide is provided at its front end with locking means, adapted to engage automatically with complementary means carried by the stem sole, these means being associated with means of unlocking on command.

Other features and advantages will become apparent from the description which follows with reference to the appended scematic drawing showing several embodiments of this equipment.

Figure 1 is a side view in longitudinal section in the vertical median plane, showing a first embodiment of the invention when the equipment rests on the chassis of a utility vehicle and maintains a platform with cradle,

Figure 2 is an elevational view from the rear of the equipment of Figure 1, Figure 3 is a partial view from the rear, showing on an enlarged scale the internal structure of the arm and the slide of Figure 2, the latter being in cross-section, Figure 4 is a partial view showing on an enlarged scale the cross section of an embodiment of the box beam of the articulated support arm,

Figure 5 is an elevational side view, when the equipment is in one of its gripping positions of the bracket of a load carrying element waiting on the ground,

FIG. 6 is a sectional side view showing on an enlarged scale the rear end of the support arm, slide and stem assembly shown in FIG. 5,

Figure 7 is an elevational side view, showing the equipment when the rocker bracket of the load-bearing member is grasped by the bracket of the equipment and when the slide is deployed at the maximum under the load-bearing member,

FIG. 8 is a sectional side view showing on an enlarged scale the rear end of the support arm, slide and stem assembly shown in FIG. 7,

Figure 9 is a cross sectional view from the rear of a second embodiment of the equipment, Figure 10 is a side view, in longitudinal section and reduced scale, of the equipment of Figure 9, when the stem is in one of its gripping positions of the gantry crane of a load carrying element waiting on the ground,

Figure 11 is a side view, in longitudinal section and on an even smaller scale, of the equipment of Figure 9 when the load bearing member is being loaded on the slider;

Figure 12 is a partial side view and in section of a third embodiment of the equipment,

Figure 13 is a broken sectional view showing on an enlarged scale the cross section of the support arm and slider of this third embodiment, Figures 14, 15 and 16 are schematic side views showing three sequences of the loading of an element. door load on the equipment.

As in the state of the art and in particular in the document FR2763035, in the name of the inventor, the equipment according to the invention, which is intended to be attached and fixed on the chassis 1 of a commercial vehicle, comprises a false frame 10 formed by longitudinal members 9 and crosspieces 7 and 8, visible in FIG. 1. This false frame 10 carries an intermediate structure S composed of a support arm 20 and a slider 70. The rear end of the support arm 20 is articulated at 16 on the subframe and can be raised and pivoted by hydraulic means and in particular by double-acting cylinders 11, equipped with relief valves 99, visible in FIGS. 5 to 8. The slide 70 is slidably mounted in the support arm 20, by means of translation guide means and is connected to means for moving it in both directions and over the entire length of the arm, such as hydraulic cylinder, pinion and rack or pinions and chains. The structure, operation and utility of these various means being described in the state of the art defined above, they will be developed in the present description for the understanding of the invention.

In a first embodiment of the equipment and as shown in Figures 1 to 8, the subframe 10 is provided at its rear end with two clevises 6 arranged laterally and each receiving a transverse axis 16. By their portion opening between the two clevises 6, these axes form the pivot pins of the support arm 20, while, by their portion between the branches of the yokes, each of them serves to the articulation of a roller 18, in the form of diabolo. These rollers are intended for the reception and rolling of the bottom of the load bearing element, such as the plate 98 with gantry bracket 97, visible in FIGS. 5 to 8.

As shown in detail in FIG. 4, the support arm 20 is constituted by a mechanically welded box girder, the central portion of which is formed by a coated C-shaped metal profile 22 internally reinforced, on the one hand, by two vertical walls 23 supporting the ends. C and, on the other hand, by a horizontal plate 24 extending between these two and forming spacer and raceway for the rollers 51 of the bracket 40 described below. The walls 23 and the plate 24 form inside the C a H delimiting a central and upper compartment 30 open towards the outside, a lower central compartment 31 and two lateral compartments 32. The upper and inner part of each of the walls 23 receives, by bolting, a rail 26 for retaining the stem truck. Wear plates 21 are welded on the upper returns of the C-section, on either side of the opening of this C, to form sliding paths for a sole 41 of the bracket 40.

Against the outer faces of the C-profile and near its rear end are attached two hinge parts 15 each having a bearing 14 for the corresponding axis 16 end.

FIG. 5 shows that the hydraulic means 11 for maneuvering the support arm 20 are constituted by two jacks, arranged on either side of the arm 20 and whose body 11a is articulated on the subframe 10 by a transverse axis 12, then that the rod 11b is articulated on the arm 20 by a transverse articulation 13.

FIG. 3 shows that the slider 70 consists of two tubular longitudinal members 70a and 70b, arranged in the lateral compartments 32 of the support arm 20. The posterior ends of these longitudinal members are connected by a transverse plate 72. Each of the longitudinal members 70a and 70b, of rectangular cross-section, has on its outer faces plates 71 of low friction material ensuring its guiding against the inner faces of the compartments 32 of the box beam. The movements of the slider 70 are provided by cylinders 90 which are partly disposed within their longitudinal members 70a or 70b, which reduces the overall size of the equipment and, especially its height. FIG. 6 shows that the rod 90a of each cylinder 90 is articulated by a transverse axis 73 on the corresponding spar 70a, while its body 90b is articulated by a transverse axis 33 (FIG. 8) on the support arm 20. According to the invention , the hooking means of the equipment which cooperate with the rocker handle 95 of the load bearing element, such as the plate 98, comprise a coupling hook 52 carried by a bracket 40.

In this first embodiment, and as shown in Figure 3, the sole 41 of the bracket 40 is slidably mounted on the support arm 20 and more specifically on the wear plates 21 described above. This sole 41 is integral with a vertical core 42 which, in its part penetrating into the central compartment 30, carries rolls of wheels 51 mounted free to rotate about transverse axes 56. The rollers bear on the raceway formed by the upper face of the spacer plate 24. In the presence of forces pulling the stem outwards, these wheels can come rolling against the underside of the rails 26, which then ensure the retention of the gallows by preventing its extraction out of the support arm.

The movements of the bracket 40 over the entire length of the support arm 20 can be provided by any means. In the embodiment shown in FIGS. 1 to 8, these means comprise a hydraulic jack 60, housed in the lower central compartment 31. The body 60a, visible in FIG. 1, is coupled to the front end of the support arm 20 by a axis 66, while its rod 60b is linked to a carriage 67 carrying two pinion gears 68 for the two strands 63a and 63b of a chain 63. One end of the strand 63a is hooked at 69 to the body of the support arm 20 while its other end is hooked at 74 to the front of the soul 42 of the gallows. The other strand 63b of the chain is hooked at 75 at the posterior end of the core 42 and, at its other end 76 at the front end of the slider 70, and for example at the plate 72 connecting the two tubular side members 70a and 70b. This chain transmission further comprises two gear wheels 78 and 79 arranged, the first at the front end of the support arm, and the second at the rear end of the slide.

As shown in detail in Figures 2 and 6, the bracket 40 is constituted by two uprights 43 projecting upwards from the sole 41 and spaced transversely to form a housing 39 for a lever 50 and its actuating means 61. The lever 50 is articulated on the uprights 43 by a transverse axis 62. Its free end is provided with the coupling hook 52, whose opening is turned towards the front, while its other end is connected by a transverse articulation. 64, to the stem 61a of a double-acting hydraulic cylinder 61. The body 61b of this jack is itself articulated on an axis 65 connecting the tops of the two uprights 43. Finally, these amounts are also connected by a foot spacer 45 and a top piece 66 from which protrudes a butt 44 which, when the lever 50 is straightened between the uprights, enters the opening of the hook 52 to lock the cradle handle 95, as shown in FIGS. 8.

It should be noted that all the guiding and driving means of the components of the equipment are integrated in the intermediate structure attached to the chassis 1 of the vehicle, considerably limiting the raising of the surface of the vehicle intended to receive a door element. load, such as tray or skip. During the loading and unloading operations, this arrangement is favorable, on the one hand, to the limitation of the inclination of the load-bearing element, and, on the other hand, to the reduction of the lever arms determining the value of the moments whose distribution must be controlled on both sides of the rear axle E.

When the equipment is in the transport position, as shown in Figure 1, the support arm 20 rests substantially horizontally on the subframe 10, the slider 70 is fully retracted into the support arm 20 and the vehicle and the bracket 40 is at the front with its lever 50 folded between the uprights 52.

FIG. 5 shows that in order to pick up a tray 98 with a cradle bracket 97, the support arm 20 is pivoted upwards and backwards around the axes 16 and by its cylinders 11, until it forms with respect to the horizontal loading angle A, which may have a value greater than 45 degrees. Simultaneously, the bracket 40 is brought to the rear end of the support arm 20 and its lever 50, equipped with the hook hitch 52, is pivoted and lowered, to come into its gripping position. At this stage the vehicle is moved back so that, during the folding maneuver of the lever 50 between the two uprights 43 of the bracket, the hook 52 can come up on the rocker handle 95.

After taking the handle 95, the continuation of the folding of the lever 50 brings the handle against the butt 44 which, as shown in Figure 8, locks the hooking.

This movement of the arm 50 of the bracket takes place at the same time that the support arm 20 is rotated to reduce the value of the loading angle A. This allows the ground to take off the front of the plate 98 and move to the next phase of loading, phase of moving the slider 70 in the direction of the arrow 76 of Figure 7 so that it unfolds under the plate 98 to its maximum extension position. In this position and as shown by the arrow 77, the end plate 72 of the slider is pressed under the bottom of the plate 98 with a force F1. This effort being in the opposite direction to the action of gravity, it reduces the value of the moment which, exerted around the rear axle E, tends to rear the front of the vehicle.

From this position of the slider 70, its movement is reversed so that it retracts into the support arm 20, at the same time as the support arm 20 is a little further lowered by pivoting towards the chassis to gradually bring the tray to the horizontal. If the load bearing member, such as the tray 98 is equipped with projecting crossbar or transverse tabs 96, the movement of the slider 70 allows its end plate 72 to come against the latch to communicate its own movement to the plate 98.

This movement can also be completed by that coming from the bracket 40 which pulls the plate 98 at the same time as it returns towards the front of the vehicle. Following the operation of loading the tray on the subframe 10 and anti-clogging control during this operation are carried out as described in document FR2763035. This process will not be repeated here because it has no effect on the nature and operation of the means according to the invention, concerning the previous phase of attachment of the handle of a cargo carrier element and the beginning of its draw on the vehicle.

The second embodiment shown in Figures 9 to 12 differs from the previous by a simplification of the structure of the equipment and the sliding of the bracket on the slide. The elements providing the same functions as in the previous embodiment but having a different form will carry a numerical reference increased by 100, those identical will bear the same reference and those new will be referenced from 80.

In FIG. 9, the support arm 20 consists of a U-shaped metal section 80, the bottom of which is divided by two vertical walls 123 into three compartments, namely a central compartment 131 and two lateral compartments 132. cradles 81 on which rest the elements of the actuating cylinders 90 of the slider 170. The section 80 is integral with parts 15 which, as before, are each provided with a bearing 14 for receiving one of the ends of shafts 16 around which the support arm can pivot to the rear of the subframe. The movements of the support arm 120 are controlled by cylinders 11, visible in Figures 11 and 12 and arranged on either side of this arm. Near its upper edge, each flange of the profile 80 carries horizontal horizontal axes 82 on which rollers 151 are mounted free to rotate. These axes are distributed along the profile to ensure continuous guidance of the slider 170.

The slide 170 is composed of a longitudinal bottom plate 83 on which upper tubular stringers 170a and 170b are fixed and the bent wings of a lower channel 84. The longitudinal members 170a and 170b are welded to wear plates. 121 on which the sole 141 of the bracket 140 can slide.

The bottom plate 83 and the wear plates 121 delimit longitudinal longitudinal passages C which receive the rollers 151 and which can be moved longitudinally with respect to these rollers.

Gutter 84 is disposed in central compartment 131 of support arm 120 and cooperates with lateral guide balls 87 carried by walls 123.

The bracket 140 is held in vertical translation by an inner plate against 85 fixed on its sole 141 by screws 86 arranged in the longitudinal median plane of the slide. Its movements on the slider 170 are ensured by the jack 60 which is arranged partly in the trough 84 and which is connected to the bracket by two chain strands 163a and 163b passing over the idlers, as in the embodiment previous.

FIG. 10 shows that the hook 152, open towards the front, is carried vertically and directly by the uprights 143 of the bracket 140.

In the preparation phase of the equipment for loading a tray 98, with bracket 97 and handle 95, the bracket 140 which, by sliding was brought to the rear end of the slide 170, still benefits from the displacement of this slider relative to the support arm 120. As shown in Figure 10, this movement combined with the pivoting of the arm 120 about the axes 16 makes it possible to bring the hook 152 to the bottom of the handle of Hook 95 to facilitate the hooking .

When the hooking is carried out, the support arm 120 is pivoted to reduce its loading angle A, as shown in FIG. 11, the bracket 140 is moved along the arrow 86 towards the front end of the slide 170 and the slide is moved in the opposite direction, according to the arrow 87, to come to bear under the plate 98 with a force F1. As in the previous embodiment, the support of F1 generates, relative to the axle E, a moment M2 which opposes that M1, equal to the product of the load Fr by the lever arm up to the axle E.

When the bracket 140 reaches the end of the race at the end of the slide, the slide 170 and the plate 98 are moved at the same time in the direction of the arrow 86 to pull the plate 98 on the equipment.

Compared to the previous embodiment, the lever 50 and its actuating mechanism are removed, which lighten the construction and reduces the hydraulic energy consumption necessary for the movements of this lever. In addition, the separation of the ground from the load carrying element is carried out with a smaller lever arm, which has the advantage of reducing the moment developed by the load around the axis of the axle.

Finally, FIG. 9 shows that this construction has the advantage of simplifying the assembly of the elements in the support arm 120, since the compartments 131 and 132 are directly accessible when the slide 170 is not not yet in place, and that the slider 170 can be assembled, out of the arm and with all its elements, before being installed in the arm.

In a third embodiment, shown in Figures 12 to 16, wherein the equipment comprises a support arm 220, hinged at 16 on the subframe 10, and a slider 270 movable on the support arm and carrying a bracket 240, the stem is composed of a support leg 46 and a lever 47. The leg 46 is provided at its upper end with a hooking means of the handle of Hook 95, such as a fork 48 , while its lower end carries at least one roller 49 movable in a slide 19 (Figure 12) of the sole 241 of the bracket. The lever 47 is hinged, by its front end and by an axis 57, on a yoke 58 formed in front of the sole 241 and, by its rear end and by an axis 59, on the support leg 46. shown, the distance L between the joints 57 and 59 has the same value as that between the articulation of the roller 49 and the hinge 59.

Note that, with a single lever 47, the lower portion of the support leg 46 can either be unique and arranged in the longitudinal median plane of the sole 241, or be fork-shaped downwards, each of the branches carries a roller 49 rolling in a slide of the sole, each of the slides having a rear stop 28 limiting the rear travel of the corresponding roller. The slider 270 can be moved by the means in FIGS. 9 and 10, namely cylinder 60, chain straps 163a and 163b and idler sprockets, or, in a variant, not be linked to any specific means. In this last variant, shown in FIGS. 12 to 16, the soleplate 241 is free to slide on the support arm 270. On its anterior part, this soleplate comprises locking means 88 which can be snap-fastened with complementary means 89, arranged at a distance from each other. front end of the slider 270.

With this bracket the loading process is as follows:

In the usual way, shown in FIG. 12, the support arm 220 is pivoted upwardly around the hinge 16, and then the slider 270 is deployed downwards. During this movement, the two parts of the bracket 240, which are arranged below the hinge axis 59, deviate in the manner of the branches of a compass. By the recoil of the vehicle and the angulation given to the support arm 220, the fork 48 is brought under the attachment means 95 of the cradle bracket 97, then is engaged on these means. As of this engagement and as shown in FIG. 14, the support arm is pivoted downwards according to the arrow 91. This has the consequence of lifting the front of the load carrying member 98, while the slider 270 begins its deployment maneuver under the tray 98, as mounted by the arrow 92 in the same figure. It appears that the cradle bracket 97 comes into contact with the roller 49 and forces the leg 46 to fold against the lever 47, by pivoting about the hinge 59.

During these movements, the support on the ground of the rear part of the plate 98, on the one hand, blocks the recoil of the latter, as shown in FIG. 11 for the second embodiment and, on the other hand, exerts on the sole 241 a forward effort, according to the arrow 93 in Figure 5. This effort continues to close the compass formed between the leg 46 and the lever 47 and tends to push the stem and the sole on the front of the slide 270. When the slider reaches the end of the folding stroke, the bracket 240 is stopped at the front end of this slider and is locked in this position by cooperation of the locking means 88 and 89, as shown in FIG.

To complete the loading on the vehicle, it remains only to bring the slider 270 in the transport position, using its only hydraulic cylinders 90 to pull it on the support arm 220, as shown by the arrow 94 in Figure 16.

As in the two previous embodiments, during all the phases just described, the relief valves 99 control the balance between the load moment M1 generated by the load and the anticlocking moment. To unload a load carrying member 98 from the vehicle, the slider

270 is moved in an extension maneuver out of the support arm 220, which is not yet pivoted upwards about its axis 16. As soon as the gravity is exerted on the portion of the slider protruding from the back of the arm support, generates a moment M1 tending to pivot the arm 220 by subjecting the double-acting cylinders 90 to extension forces, it is the discharge valves which, releasing the pressure in the cylinders

90, allow the pivoting of the support arm 220 and the control of this pivoting.

When the front part of the load-bearing element 98 is resting on the ground, the means 89 for locking the bracket 240 on the slider 270 are brought into the unlocking position, for example by an electromagnet 34 (FIG. 16). so that the slide 270 can be raised in the arm, leaving the gallows hitched to the gallows.

At the end of raising of the slider 270, the roller 49 meets a stop 28 (FIG. 12) on the soleplate 241. Thanks thereto, when the support arm 220 is straightened, the bracket 240 assumes the configuration of FIG. pose of the gallows gallows on the ground.

This construction, which significantly reduces the number of parts, reduces manufacturing costs, assembly costs and the mass of mobile or displaceable structures, also has the advantage of reducing the moment of resistance M1, thanks to the approach towards the axis of the axle E of the point of application of the force resistant and resulting Fr. This reduction is in the direction of a reduction of risks of pitching, while offering, compared to an equipment according to the state of the technical with the same hydraulic power, the ability to load and unload items carrying heavier loads, without having to worry about pitching.

Claims

1.) Reportable equipment on the chassis of a utility vehicle for handling a load carrying member, said equipment comprising: - a false frame (10) adapted to rest and to be connected to the chassis (1) of the vehicle an intermediate structure (S) comprising a support arm (20, 120) and a slider (70, 170) and wherein:

• the support arm is connected to the subframe (10), on the one hand, by a rear transverse articulation (16) and, on the other hand, by a hydraulic cylinder (11) ensuring its pivoting,

The slider (70, 170) is slidably mounted in longitudinal translation in the support arm (20, 120) and is connected to maneuvering means (90) able to move it in two directions between two extreme positions, namely, a position transport, in which it is fully retracted, and a gripping position, in which it is extended outwards, hooking means (52, 152) adapted to cooperate with complementary means (95) carried by each load-bearing element (98), and at least one discharge valve arranged on the hydraulic circuit of the cylinders controlling the movements of the support arm, characterized in that the attachment means (52, 152) are carried by a bracket ( 40, 140) displaceable in translation above the intermediate structure (S) between a rear gripping position, wherein said hooking means (52, 152) cooperate with those (95) provided on the gantry crane (97). ) of the the load bearing member (98) to be removed, and a holding forward position, wherein these means (52, 152) participate in maintaining the load bearing member (98) on the vehicle.

2.) Handling equipment according to claim 1 characterized in that the bracket (40) is slidably mounted on the support arm (20) and is connected to double-acting hydraulic cylinders (11) adapted to move longitudinally and in the two directions, these cylinders (11) being independent of those (60) moving the slide (70).

3.) Handling equipment according to claim 1 characterized in that the bracket (140) is slidably mounted on the slide (170), with the possibility of displacement in both directions and over its entire length, and is connected to means ( 60, 163a, 163b) adapted to move longitudinally in both directions, these means being independent of those (90) moving the slide (170).

4.) Handling equipment according to claim 1 characterized in that the attachment means carried by the bracket (40) comprises a hook (52) projecting from the free end of a lever (50) hinged to the uprights ( 43) of the bracket, the other end of this lever being connected to maneuvering means (61) able to pivot this lever between an erasing position, in which it is folded against the stem, and a loading position , in which it protrudes rearwards from the gallows.

5.) Handling equipment according to claim 1 characterized in that the hooking means carried by the bracket (140) comprises a fixed hook (152) projecting from the top of the uprights (143) of the bracket and whose opening is turned forward, said hook (152) being brought to the level of the attachment means of the load bearing member (98) by the movement of the slider (170) combined with the inclination of the support arm (120).

6.) Handling equipment according to claim 1 characterized in that the bracket (40) is secured to a sole (41) with a lower vertical core (42) inserted into the central opening of the box structure constituting the support arm (20), said boxed structure being formed by a beam (22) which, having a recessed section C, is internally reinforced by two vertical walls (23), supporting the ends of the C, and a horizontal spacer plate (24). ), connecting these walls and forming a raceway for rollers (51) carried by the web (42) of the carriage, these walls and spacer defining, under the spacer plate (24), a lower central compartment (31) receiving means (60) for moving the bracket, and laterally to the vertical walls (23), receiving compartments of the slide (70) and its displacement means (90).

7.) Handling equipment according to claim 1 characterized in that the support arm (120) is constituted by a U-section (80) whose bottom is divided by two vertical walls (123) into three compartments, respectively, central ( 131) and side (132), the central compartment (131) containing the means for actuating the bracket (140) while the lateral compartments (132) contain the actuating means of the slide (170), while the slide (170) comprises a bottom longitudinal plate (83) on which are fixed:

• upper tubular stringers (170a and 170b) carrying wear plates (121) for sliding on them of the sole (141) of the bracket (140),

• and the wings of a lower gutter (84) containing the actuating means (60, 163a and 163b) of the bracket (140), said gutter penetrating into the central compartment (131) of the slide where it is guided in translation by lateral balls (87) carried by the walls (123), the plate (83) delimiting with the wear plates (121) side channels C, forming raceways for guide rollers (151) borne by the wings of the U-shaped section inside it.

8.) The handling equipment reportable on the chassis of a vehicle according to claim 1 characterized in that the bracket (240) is composed of:

- A support leg (46) whose upper end carries the hooking means (48) cooperating with those (95) of the cradle of a load bearing member

(98) and whose lower end is provided with at least one roller (49) of transverse axis, movable on a sole (241) slidably mounted on the slide (270), and a lever (47). ) whose lower end is articulated, about a transverse axis, on the front end of the sole (241), while its upper end is articulated on the support leg (46) forming a deformable compass with the lower part of it.

9.) Reportable handling equipment on the chassis of a vehicle according to claims 1 and 8, taken together, characterized in that the slide (270) is provided at its front end locking means (89), adapted to s automatically engage with complementary means (88), carried by the sole (241) gallows, these means being associated with controlled unlocking means (34).