Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
  • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
  • B60P1/04—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element
  • B60P1/26—Means for controlling movement of tailboards or sideboards

Definitions

• the present invention relates to a rear door of a dump body of transport vehicle of the truck type.
• These vehicles are for example used for the transport of molten bituminous products, intended to be spread on a roadway in progress as well as for the transport of gravel and other materials used on road construction sites
• rear door is meant the tipper unloading door Usually, this door, considering the direction of travel of the vehicle, is physically placed at the rear of the tipper, but this unloading door can constitute wholly or in part only, one of the longitudinal side walls of the bucket These walls will be referred to below as the drop side
• Bituminous products molten at a temperature of 170 degrees Celsius, are transported from their place of manufacture to the site, in the dump bodies of trucks
• a covering tarpaulin is provided, removably attached to the side boards as well as to the rear door of the tipper body.
• the rear doors of the tipping bodies of the trucks are constituted either by two leaves pivotally mounted around vertical axes, substantially corresponding to the rear vertical edges of the side rails, either by a single leaf pivotally mounted a around a horizontal axis corresponding substantially to the horizontal upper edge of said leaf
• the leaf (s) of the latter is or are maintained in the closed position by locking hooks, tilting, operating automatically in the unlocking direction at the start of rear tilting of the tipper In this way, together with the rear tilting of the tipper, the tipper door is opened automatically without the driver having to leave the cab of his vehicle to free the door from the grip of the locking hooks.
• the object of the present invention is to provide a solution to the problems mentioned above by implementing a new type of rear door of a tipper body of a transport vehicle presenting little risk of jamming in the finisher's hold.
• Another object of the present invention is the implementation of a door designed so as to avoid the operation of separating the cover from the rear door of the bucket
• a final object of the present invention is to avoid as much as driver may leave cab
• the unloading door of a dump body of a transport vehicle of the truck type comprising two leaves and the lower part of which, in the closed position, cooperates with locking hooks which operate in the unlocking direction.
• the wings are mounted one above the other along the plane of the rear opening of the bucket and are articulated to each other according to a horizontal axis, the lower leaf cooperating with an opening actuation mechanism ensuring during opening its folding down towards or against the upper leaf
• the upper leaf is kept fixed relative to the tilting skip. Due to these characteristics, the lower leaf when unloading products in the finisher's hold will be released from the opening of said hold, which eliminates any risk of jamming.
• the covering sheet will be fixed to the upper leaf which will avoid the operation of decoupling the latter before unloading
• this mechanism is constituted by at least one traction cable engaged on a set of fixed upper pulleys on the one hand, by one of its ends to the lower leaf, and on the other hand, by its other end, a traction means constituted by a counterweight guided in slides secured to the external face of one of the side boards, said counterweight, when the lower leaf is in the closed position of the rear opening occupying an upper position in which it is located in the upper area of the rails
• the rails are perpendicular to the longitudinal sides of the drop side
• the locking hooks release the lower leaf and the latter, under the thrust of the mass of product contained in the bucket on the one hand and the tensile force exerted by the counterweight via the cable on the other hand, initiates its opening movement and pivots towards the external face of the upper leaf
• the closing of the lower leaf and its locking in closed position operates in the same way as for a single leaf door
• the upper leaf is articulated along a horizontal axis corresponding substantially to its horizontal upper edge, to the two lateral drop sides and cooperates with a locking mechanism can be placed in an active state or in an inactive state, said locking mechanism, according to the active state, ensuring the maintenance of said leaf 20 in the plane of the opening and against the rear edges of the side rails.
• this mechanism in the configuration of a door with two leaves movable relative to the other being inactive
• FIG. 2 is a side view of the skip in unloading position, the lower leaf of the door being in the open position,
• FIG. 3 is a rear perspective view of the bucket and the door according to the invention
• FIGS. 4 and 5 are side views of other embodiments of the door actuation mechanism
• FIGs 1 to 7 the rear part of a transport vehicle of the truck type comprising a tilting bucket 1 for the transport and unloading of various materials
• This bucket in known manner, comprises on a chassis, a bottom wall 10 of rectangular shape with which are associated two side boards 1 1, parallel, opposite, extending along the length of the bucket and constituting the longitudinal sides of the latter, a front side panel 12, disposed between the side boards, at the front end of the latter and constituting the front transverse side, and an unloading door 2, with two leaves 20 and 21, disposed at the rear end of the bucket and associated with the unloading opening 3 of rectangular shape which the tipper has at the rear end in this embodiment
• the door 2 is held in the closed position of the opening 3 by hooks 4 associated with a control mechanism, known per se, which releases them from the door 2 during the rear tilting of the bucket 1
• Each leaf 20, 21 is constituted by a rectangular panel, reinforced, externally to the internal volume of the bucket, by a rectangular frame formed by two horizontal, parallel beams, joined at the end by two crosspieces
• the beams and the crosspieces are typically formed by tubular elements of square or rectangular cross section
• the longitudinal members form the external longitudinal edges of the leaf and the cross members form the lateral edges of the latter
• the two leaves 20 and 21 are mounted one above the other and are articulated to each other by hinges 5, along a horizontal axis corresponding to the horizontal lower edge for the upper leaf 20 and to the horizontal upper edge for the lower leaf 21
• the upper flap 20 hides the upper part of the opening while the lower flap hides in the closed position the lower part of the opening of the bucket
• the upper leaf 20 by its upper zone, is articulated along a horizontal axis, to the two lateral drop sides
• this leaf comprises, in attachment to the inner face of the bucket, two legs each carrying a horizontal journal developing along the axis articulation and laterally relative to the corresponding lug
• One of the two pins is engaged in a bearing secured to one of the side boards and the other in a bearing secured to the other side board
• the upper leaf 20 is held in the plane of the opening 3 against the rear vertical edges of the side rails 11, by a locking mechanism 6 which can be placed in an active state or in an inactive state
• This locking mechanism according to the active state, keeps the leaf 20 firmly in the plane of the opening 3 and prohibits any movement of this leaf relative to the bucket
• the locking mechanism comprises on the one hand at least one hook 60 forms at the end of a rocking lever 61 mounts articulated on an axis secured to one of the side boards and on the other hand a ring 63 secured to the vertical lateral edge corresponding to the upper leaf 20, said lever 61 being associated with a mechanism 62 for pivotally actuating an inactive position in which the hook is released from the ring towards an active position in which the hook is engaged in the ring in the inactive position of the lever corresponding to the inactive state of the locking mechanism and the active position of the lever to the active state of said mechanism
• the lever is mechanically linked to an elastic return member which biases it towards the active position, this elastic member Must be a coil spring, wrapped around the axis of articulation of the lever and fixed by one of its ends to said lever and by its other end to the axis of articulation
• the pivoting actuation mechanism 62 is constituted by an operating handle, but the latter may be constituted by an electric motor of the electro
• the lower leaf 21 cooperates in the closed position of the opening 3 with the locking hooks 4 At the lower leaf 21 is associated at least one actuation mechanism for opening
• the actuation mechanism comprises a traction cable 70 engaged on several idler pulleys 71, 72 and fixed on the one hand, by one of its ends in a fastener 73 secured to the large external face of the lower leaf 21 and arranged in the zone lower of the latter on one of the lateral edges of said face
• the cable 70 is fixed to a traction means constituted, according to a first embodiment, by a counterweight 74 slidably mounted in slides 75 fixed to the side panel corresponding to the side edge to which the fastener is fixed
• the first deflection pulley 71, on which the cable 70 is partially wound, is mounted in rotation on an axis fixed in a yoke 76 secured to the horizontal upper edge of the upper leaf
• the second deflection pulley 72 is rotatably mounted on an axis mounted in a yoke 77 fixed to the upper end of a green arm 78 ical, fixed by its lower end to the corresponding side wall
• a third pulley 8 mounted for rotation on an axis mounted in a yoke 80 secured to the large external face of the upper leaf 20
• the axis of the pulley 8 is parallel to the geometric axis of articulation of the leaf 21 to the leaf 20
• the cable 70 is engaged between the wings of the yoke 80 and comes into contact with the groove of the pulley 8 This pulley, during the opening movement of the lower leaf to keep the cable near the upper leaf
• this pulley constitutes a stop for the opening movement of the lower leaf.
• the distance between the pulley and the hinge axis of the leaves to each other is equal to or greater than the distance between the fastener and said hinge axis
• the counterweight 74 is provided with rollers 9 for rolling in the slides 75
• the slides 75 are fixed against the external face of the corresponding side panel 11 and preferably are perpendicular to the longitudinal sides of the side panel 11
• these slides are each formed by a profile of cross section in U and are turned by their lower surface towards each other
• the rollers are arranged between the wings of the slide with which they cooperate and come to roll on the lower surface of the latter's core
• the counterweight 74 occupies a higher position and is located in the upper region of the slides.
• the hooks 4 release the lower leaf 21, which is subjected on the one hand to the thrust of the product and on the other hand to the action of the counterweight by means of the cable 70
• This counterweight by moving under the effect of its weight in the slides 75, from an upper position to a lower position causes the lower leaf to tilt towards the upper leaf
• two mechanisms 7 for actuating the opening of the lower leaf 21 are provided, these two mechanisms cooperating respectively with the two lateral edges of the lower leaf on the one hand and with the two lateral sides 11
• the means of traction of or each actuation mechanism 7 is constituted by a hydraulic cylinder 13 for example of the double-acting type, connected to an appropriate hydraulic circuit known per se
• This hydraulic circuit will consisting of a hydraulic pump associated with a hydraulic tank and connected via hydraulic lines to a hydraulic distributor whose drawer can occupy three distinct positions
• the first position corresponds to the supply to the front chamber of the jack and to the load shedding of the rear chamber
• the second position or central position corresponds to the blocking of the jack by closing off the pipes associated with the front and rear chamber
• the third position corresponds to the supply to the rear chamber of the jack and to the load shedding of the front chamber
• e is the retraction of the rod into the body is the outlet of the latter Hydraulic ve ⁇ n be articulated by its body to a shaft integral with a clevis fixed to the corresponding side panel
• the end of the piston rod will equipped with a fastener in which the traction cable
• each of the hinge pins of the upper leaf to the two side panels is engaged a roller 14
• the two rollers 14 of the leaf 20 are engaged in the form of guide rails 110 formed in the upper edges of the sides 1 1
• Each form of guide rail 110, at the discharge opening, has a recess 111 into which the corresponding roller 14 is introduced, and the form of guide rail 110 has a straight portion 112 connected to the hollow 111 by a ramp 113
• the traction means of each actuation mechanism is constituted by a v hydraulic cylinder 13 and this hydraulic cylinder is mounted on the upper bank of the corresponding drop side.
• the bucket may not be equipped with arms 78 and pulleys 72
• the recess 11 1, the ramp 113, and the straight portion 112 constitute the track for the roller 14
• This track for the roller is bordered laterally by two lateral blanks opposing the derailment of the roller 14
• the door thus seen gradually straightens towards a horizontal position and each roller under the effect of the traction of the corresponding cable 70 is extracted from the hollow 111 of the form of rail 110, climbs the ramp 113 and reaches the straight portion 112 In this position, the door phée is located above the transport volume of the bucket and completely releases the rear opening
• the door under the effect of its own weight returns to its initial position
• the bearing in which engages the hinge pin of the upper leaf of the door to the corresponding drop side is formed in the rear upright 15 of the latter
• This amount consists of two tubular sections 15a , 15b mounted in bed one inside the other, and in this amount is disposed a double-acting hydraulic cylinder 15c articulated by its body to the lower section 15a and by its rod to the upper section 15b
• the traction cable 70 is connected to the rod of the corresponding cylinder 13 by a compensating spring 16
• the compensating spring makes it possible to absorb the variations in distance between the end of the jack rod and the pulley 71 during the upward movement of the door
• the bucket may not be equipped with arms 78 and pulleys 72
• the flat wall constituting the drop side itself is secured only to the section
• the locking mechanism 100 is constituted by a rod 101, of circular cross section, with operating member 102, such as handle, mounted in a tubular guide 103 fixed to the external face of the upper leaf 20 and extending perpendicular to the axis of articulation of the two leaves 20 and 21 to each other
• This rod 101 from a position of erasure according to which it is entirely disposed opposite the external face of the upper leaf 20, is axially displaceable in the tubular guide 103 towards a locking position in which it develops transversely to the axis of articulation of the two leaves to one another and is arranged, by its lower end portion, in a sheath 104 fixed to the external face of the lower leaf
• the rod 101 in the erasure from a position of erasure according to which it is entirely disposed opposite the external face of the upper leaf 20
• This rod 101 from a position of erasure according to which it is entirely disposed opposite the external face of the upper leaf 20, is axially displaceable in the tubular guide 103 towards
• the projecting finger In the erasing position of the rod, the projecting finger is engaged in the second slot.
• two locking mechanisms 100 are provided, arranged in separation I from one another.
• the door according to the present invention although intended to be mounted on skips used for the transport of bituminous products, can equip skips used for the transport of agricultural products (cereals, fruits, beets etc) or others
• the locking mechanism of the upper leaf can be placed in the inactive position without the articulation of the two leaves to each other being locked.
• the lower leaf of the door will be mobilized relative to the upper leaf by at least one hydraulic cylinder connected to an appropriate hydraulic circuit and articulated by the end of its rod in a clevis attached to the upper leaf and by its body in a fixed clevis at beating lower.
• the traction cable 70 is fixed by its corresponding end to the upper leaf.
• the unloading door and the actuating mechanism may be mounted on a support structure removably attached to the bucket.

Landscapes

• Engineering & Computer Science (AREA)
• Transportation (AREA)
• Mechanical Engineering (AREA)
• Superstructure Of Vehicle (AREA)
• Lock And Its Accessories (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=9498452

Family Applications (1)

Country Status (4)

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Family Cites Families (7)

• 1996
  • 1996-12-05 FR FR9615069A patent/FR2756790B1/fr not_active Expired - Fee Related
• 1997
  • 1997-12-05 WO PCT/FR1997/002221 patent/WO1998024654A1/fr not_active Application Discontinuation
  • 1997-12-05 EP EP97950239A patent/EP0877676A1/de not_active Withdrawn
  • 1997-12-05 AU AU53268/98A patent/AU5326898A/en not_active Abandoned

Non-Patent Citations (1)

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