FR2470200A1 - Vehicle for deposition of sand fill in trench - uses archimedean screw on top edge of bottom hung pivotable side wall of vehicle - Google Patents

Abstract

The lorry gives continuous uniform deposition of a sand fill layer in an open trench, using an Archimedean screw (9) mounted on the top edge of a bottom hung lateral wagon wall (10). A hooded part-cylindrical casing (6) locates the screw, fed sand (4) by progressive pivoting of the wall. It effects the end tipping of the sand. A screw may be mounted on both lateral wagon walls which may be operated hydraulically from the cab, an extension tube being used to increase the effective reach. The extension tube may be mounted on an independent tractor, with further screws which may be driven independently or by the screw through the medium of gear trains.

Description

 The present invention relates to a mechanical sand spreader which makes it possible to sand at a constant and uniform layer, whatever the forward speed of the truck, an open trench.

Indeed, since the arrival on the market of fast excavators, of the trencher type with bucket wheel, knife or tooth chain, the progress of construction sites has been slowed down by the placement of backfill sand in open excavations, for the protection of various works, electric or telephone cables, sheaths for the telephone, gas pipes or water pipes, these sanding operations are always carried out manually.

 In addition, excavations opened by these modern means no longer allow their width and circulation of a man, we come up against the difficulty of leveling this sand and the lack of thickness control (more and more expensive material).

 The mechanical laying device which is the subject of the present invention makes it possible to sand with a constant and uniform layer, whatever the forward speed of the truck, the speed of the sand feed screw being proportional to the speed of the vehicle. Knowing the volume of sand that we want to dump by the meter, we choose the speed of the Archimedes screw controlled by hydraulic motor. Once this choice is made, the screw will bring the desired volume of sand, whatever the speed of the vehicle.

The advantages of this new invention are as follows:
- Strict control of the quantities of sand deposited.

- Uniformity of the layer.

- Speed of execution (reduced footprint of pavements.)
- SX improvement of working conditions.

Fully mechanical operation-directed by the driver of his cabin.

- Economy (sanding operation by one man instead
of three.

The invention will be better understood by referring to the description and to the accompanying drawings by way of non-limiting indicative example, and are subject to numerous variants of embodiments and applications, as a new industrial product.

FIG - I - represents in section a trench (I) on the sides of which the embankment (2) rests. In (3) the water or gas pipes, for example on which in (4) the sand is deposited.

FIGS - 2- and -3- schematically represent the point of dumping of the sand using the worm (6) placed internally at the top of the ridell5u truck or the bucket.

 FIG - 4 - schematically represents the hydraulic cylinder (8) causing the bucket to tilt, the axis of the latter will be almost parallel to the axis of the truck when the sandblaster is in the working position. In (9) Archimedes' screw. In (6) the chute. The worm screw called Archimedes screw will preferably be fixed on the left side of the bucket for reasons of visibility of the driver.

FIG - 5 - represents the pouring of sand (4) into the trench by the outlet at the end of the chute (6). In (IO) the underside of the drop side
FIG - 6 - represents seen from the front the lowered drop side of the bucket. In (6) the goulett. In (9) the Archimedes screw. In (i2) its axis, In (4) out of the sand. In (II) tilt skip protection casing on the left side, the controls being grouped inside the cabin.

FIG - 7 - represents the chute (6) during the descent we will better notice the Archimede screw (9) which will receive the sand in (4).

 FIG - 8 - shows the same inclined chute whose sand (4) comes to be embedded in the worm where it will be driven towards the exit to fall in the trench placed at approximately one meter to approximately one meter 50 of the truck placed on the side of the road.

FIG - 9 - shows in section the outlet of the chute (6) showing in (I2) the axis of the Archimedes screw. In (I3) the closure at the end, and in I4 the pad or spider in the center of which the axis (I2) turns.

FIG - IO - shows at the end and in section the chute in which turns the Archimedes screw (I2)
FIG - II - represents a movable sleeve (I8) at right angles adjusting to the end of the chute in (I7) and having the ability to be able to direct on the trench, the flexible sleeve (I9). ) the clamp on the elbow (I8).

FIG - I2 - diagrams the filling of the trench when it is at a distance of three to four meters from the roadway or the bucket could not approach, in order to avoid that the flexible sleeve (I9) dragging on the upper edge of the trench, a small carriage (24) will be made integral at (21 and 22) of the sleeve on the one hand, and on the other hand by a rod or extension integral with the bucket, so that this carriage advances at the same speed
The FIG - I3 - represents the bucket (23) as a whole, the drop side (6) of which will be lowered so that the sand falls on the Archimedes screw which will pour it into the sleeve (I9) supported by the carriage (22) where it will be dumped in the center of the trench.

 FIG - 14 - represents an extension (25) fitting at the end of the chute or under the outlet of the sand from the chute.

This or these extensions will be provided internally with an Archimedes screw which will be in a way the extension of that of the bucket. In (26) the axis of the screw which is integral with llellip- balance (28). At each end of the axis in (27) and (27g) a square or other will aim to suengrainer on the previous or next extension, depending on the length where you want to pour the sand from the floor.

FIG - I5- represents in section the Archimedean screw on its axis (26).

 FIG - 16 - shows in section the outlet of the sand (29) from the bucket or it will fall on the screw (28 at right angles and orientable composed of the extensions (25).

FIG. sprockets or belts
Of all these variants it is necessary. know 10 that the bucket could be provided with two parallel screws on each side, so as to avoid in restricted places the operation of the bucket.

 20- The ability to be able to spread the sand far enough from the bucket.

30- That the hose be supported by a small cart which follows and will travel at the same speed as the bucket to which it will be made integral by an arm or telescopic extension.

40- The extensions can be oriented according to the needs of sand or gravel dumping.

 5 - an auxiliary motor can drive the screws of the extensions which will receive the sand at the outlet of the chute of the bucket.

Of course, the invention will be well understood by referring to the description and to the drawings appended as an example, but it may vary in shape, material, dimensions without the principle of the invention being altered, the aim being to remain within the framework of the new idea which is the subject of this present patent.

Claims (1)

 IO- Mechanical sand spreader for sanding at one constant and uniform layer whatever the speed  advancement of the dumpster an open trench. Characterized by the fact that the bucket is fitted with a ri  articulated delle supporting at its top in a gutter  an Archimede screw whose goal is to transmit at the end from this screw the sand which will be deposited in a trench at  open sky as the skip advances  or truck. 20- Spreader according to claim - I - characterized by the fa  that the Archimedean screw rotating in a gutter or gou  monkfish placed at the top of the curtain; fegoit when she is lowered, the sand of the bucket where it is directed on the tran to cover.  30- Spreader according to claim - I - characterized by fact that the two drop sides can each be fitted a chute and an Archimedes screw, in order to avoid  return the bucket to the road in difficult cases  and depending on the trench to fill, right or left of it pavement. 40- Spreader according to claim - I - Characterized by  that all the controls, tilting the drop sides and  the screws are rotated hydraulically from the  cabin. 5 - Spreader according to claim - I - characterized by the  because it has extension chutes, allowing  distribute the sand from the bucket at a distance of more than 3  meters from the chau'ssée, where it is difficult to bring the  grab.  60- Spreader according to claim - I - Characterized by makes the sand sheath spill into the slice is supported on the edge thereof by a small carriage secured to the bucket to avoid wasting the  sand which generally falls outside of it.  70- Spreader according to claim - I - characterized by the makes the extensions fitted with the Archimedean screw perp  diculars with the grab, will be set in motion either by  an auxiliary motor, or by a set of pinions or belt 80- A spreader according to claim - 6 - characterized by the extension screws allow for interlocking to engage at the end on the previous extension and thus right now.  90- Spreader according to claim - 5 - characterized by the  causes the distribution extensions, perpendicular à la bennelsont orientables.