FR2622561A1 - RECLINING GATEWAY DEVICE, IN PARTICULAR FOR GRAVEL SPREADING - Google Patents

Abstract

The invention relates to a device for spreading the gravel 3 in a curtain 4. The tilting gangway 8, 9 is connected to the flanges 12 of the bucket 2 by an articulated quadrilateral 14, 16, which actuate the jacks 18. Application: the floor 8 of the gangway remains substantially horizontal, whatever the angle of inclination of the bucket 2, as the gravel 3 flows.

Description

The present invention relates to a gateway device

reclining, intended to equip

  the rear of a vehicle intended to dump a cou-

  chippings. We know that the spreading of the gravel, especially for public works and for the construction of roads, is provided by a vehicle carrying a bucket

  in which the loose gravel is stored.

  Instead of the back door of the bucket, a device or "gravel" is mounted which takes the gravel from the bucket and, with the aid of a spreading roller, discharges it into the bucket.

  as the vehicle moves forward. The release

  is carried out in the form of a gravel curtain

  falling across the full width of the vehicle.

  To monitor the smooth running of

  rations, it is necessary to provide at the back of the

  bucket and above the spilled gravel curtain, an

  rator, who can move on a bridge while

advance the vehicle.

  Given that as and when

  the gravel is spilled, it is necessary to switch

  gressively the bucket to ensure that until the load is exhausted, the feeding of the spreader roller, the bridge must be carried out in a tilting form. Such a structure makes it possible to maintain substantially horizontal the

  the operator's gateway, irrespective of the angle of inclination

the bucket.

  In practice, the systems known to pass-

  tileable saddles have various disadvantages, in particular

  as regards the convenience of use, the comfort of the o

  and the effectiveness of his supervision whatever

  the conditions of his work.

  The present invention aims to avoid

  these disadvantages while ensuring a high degree of regularity

  in the spill of the gravel. A gravel

  neur according to the invention, provided to equip the rear door of a tipper, comprises a spreader roller and an articulated transverse gangway that controls at least one jack connected to the door of the bucket, and is characterized

  in that the bridge is articulated on lower flanges

  of the rear door by at least one system of four

  deformable drilater located in a longitudinal vertical plane and consisting of: - an upper arm connecting the floor of the bridge to an upper axis offlasks; - A shorter lower arm connecting a lower axis of the floor of the bridge to a lower axis of the flanges; an axis carried by the upper arm

  for the articulation of the control cylinder.

  The articulation thus produced defines, as a function of the elongation of the jack, a kinematics where the instantaneous center of rotation of the bridge makes it possible to keep it practically horizontal, whatever

  the tilting of the bucket, while presenting

  which will be discussed later.

  The attached drawing, given as an example

  non-exhaustive list, will allow a better understanding of the inven-

  and the benefits it is likely to provide.

  Fig. 1 is a perspective view of

  trant the back of a truck equipped according to the invention, during

  grit spreading operations.

  Fig. 2 is a side view of the vehicle

at the beginning of spreading.

  Fig. 3 to 5 are views similar to

  trant several successive positions, up to the maximum inclination of the bucket, as the gravel is

spilled on the road.

  The drawings show a truck

  1, carrying a tipper 2 of a type in itself

  bare. This bucket 2 contains a load of gravel 3 that is proposed to spread, in a curtain 4, the width of a road 5, under the control of an operator 6. The latter is mounted on a tilting footbridge 7 , from where he monitors

  operation, as and when the

  mion 1 advance on the road 5. The gangway 7 has a floor 8 and a rear guardrail 9. Moreover, at each end, a lower extension 10 extends obliquely

  forward and downward of floor 8.

  On either side of the known spreading roller 23, the rear door 11 of the bucket 2 comprises a fixed lower flange 12. According to the invention, the flanges 12 carry:

  an upper axis 13, on which is articulated an upper arm

lower 14;

  - a lower axis 15, on which articulates an arm

lower 16, shorter.

  The central portion of the upper arm 14 carries an axis 17 of a control cylinder 18, double acting, connected to a fixed axis 19 of the rear door 11 of the bucket Figure 1 represents the chip

  mounted at the rear of a dump body 2 in the re-

  Pos. The bridge 7 is movable through the arms 14 and 16 defining a deformable quadrilateral kinematics, where each intermediate position corresponds to an instantaneous center of rotation. This dermàer evolves next

  a trajectory defined by the calculation.

  The movement of the bridge is provided by a jack 18, fixed at 19 on the frame, and

  17 on the arm 14, which allows the elevation of the pass

  The stability of the latter and the maintenance of

  The lower arm is articulated on the lower arm and is hinged on the lower arm, and on the lower arm is fixed the bib 21, which distributes gravel. On the bridge, is fixed

the deflector 22.

  This mobile gateway system of-

  many benefits, including:

  1) to have a walkway floor in a sensitive position

  horizontally, regardless of the angle of tipping; 2) to ensure correct gravel with a tilt angle of 45, without interference

  with the ground, despite a significant cantilever overhang

  as much (possible up to 550 mm); (3) to keep, regardless of the angle of tipping, a constant distance between the ground and the deflector, while

  having a walkway floor close to the horizon-

  tale; 4) to obtain an angle of the flap and the deflector

  virtually identical, regardless of the angle of ben-

  swim; -) to ensure free passage of the operator between the guardrail of the bridge and the tailgate of the body, regardless of the angle of tipping-side; 6) to allow, through the lights, adjustment of the inclination of the flap;

  7) to obtain, for the same space requirement, an

  wider range, which allows a better distribution

gravel at the ends.

Claims (5)

  1 -Dispositif graveler provided for equi-   the rear door (11) of a tipper (2), comprising   a spreading roller (23) and an articulated transverse bridge (7) controlled by at least one jack (18) connected to the door (11) of the bucket (2), characterized in that the bridge (7) is articulated on lower flanges (12) of the rear door (11) by at least one system of   deformable quadrilateral located in a long vertical plane   tudinal, consists of: - an upper arm (14), connecting the floor (8) of the bridge (7) to an upper axis (13) of the flanges (12) - a lower arm (16) shorter, connecting a lower axis (20) of the floor (8) of the bridge (7) to a lower axis (15) of the flanges (12) - an axis (17) carried by the upper arm (14) for the   articulation of the control cylinder (18).   2 - Device g ivillonneur according to the re-   claim 1, characterized by the fact that the joint   carried out defines, as a function of elongation (18), a   where the instantial center of rotation of the   (7) makes it possible to keep it practically   irrespective of the size of the skip (2).   3 - Device g., Furrower following one   any of the preceding claims, characterized in that   the footbridge (7) has a floor (8) and a rear rail (9), while at each end a lower extension (10) extends obliquely forwardly and downwardly of the floor ( 8), to receive the axis hinge (20).   4 - Device g a3vi] lnneur following one   any of the preceding claims, characterized in that   on both sides of the spreading roller (23), the   rear door (11) of the body (2) has a flange   fixed bracket (12), these flanges (12) carrying:   the upper axis (13) on which the upper arm articulates laughter (14);   - the lower axis (15), on which articulates the arm lower - (16), shorter.   - Grit device according to any one   conque of the preceding claims, characterized in that   that the central portion of the upper arm (14) carries an axis (17) that the control cylinder (18), double acting, connected   to a fixed axis (19) of the rear door (11) of the body (2).   6 - Screener device according to any one   conque of the preceding claims, characterized in that   that on the lower arm (16) is fixed the bib (21) gravel distributor, while on the bridge (7) is fixed a deflector (22).