FR2768013A1 - SPREADER WITH TWO SEPARATELY CONTROLLED DISCS AND WITH LOWER MOBILE CROSSBAR ON ITS SUPPORT - Google Patents

Abstract

A two-disc spreader is equipped with a tank (1) of spreading product having two metering openings and agitator mechanisms arranged above these, with a common shaft for the agitator mechanisms, the two ejector discs (25) and (26) being arranged on a crosspiece (24), placed transversely to the direction of travel and guided in a movable manner in a horizontal plane. In order to obtain a large working width range for all kinds of spreading products without carrying out conversion work, it is intended that the ejector discs (25) and (26) are driven by hydraulic motors, which can be ordered separately. and arranged on the crosspiece (24), the agitator mechanism shaft being driven by a hydraulic motor, at a constant rotational speed, and the crosspiece (24) has at its ends consoles (32) which extend beyond beyond the ejector discs (25) and with the aid of which it is guided and can be positioned on the support arms (21, 22).

Description

Two disc spreader ordered separately and with lower cross member

  mobile on its support The invention relates to a two-disc spreader, equipped with a support frame, supported by a three-point hitch of a tractor, a spreading product tank with two hoppers tapering towards the each towards a dosing opening, each having an agitating mechanism disposed above each dosing opening and equipped with a common agitating mechanism shaft, oriented transversely, and each having an ejector disc disposed under the dosing openings, the two ejector discs being driven from the tractor and arranged at a great distance from each other, on a cross-member placed transversely to the direction of travel, the cross-member being guided in a movable manner in the horizontal plane and being capable of being fixed on two support arms oriented towards the rear, roughly parallel to the direction of travel, of the support frame, to ensure the offset of the

  ejector discs relative to the metering openings.

  In a known spreader of this type of construction (EP 0 496 285), ejector discs are mechanically driven from the tractor, via the PTO and an articulated shaft, as well as a transverse transmission. The transmission is arranged in a casing which is produced substantially in the form of a square tube and constitutes the cross member according to the preamble of its main claim. The transmission input shaft, to which the articulated shaft is connected, is located in the middle area of the transmission housing. Furthermore, from the input shaft, a power take-off is guided upwards on the transverse shaft of the agitator mechanism. The PTO of the transmission is conformed to

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  so that it follows the sliding movement of the

transmission housing.

  This known spreader has the important advantage of being able to adjust the point of ejection of spreading product on the disc, thanks to the simplicity

  the possibility of moving the feed point

  tation, by an offset of the transmission casing, so that, for ejector discs of a determined diameter, it is not only possible to obtain a regular image of spreading over a range of determined working width, but it is also possible to obtain in the limits of the working width range, an adaptation to the different sliding properties and

  theft of different kinds of fertilizers. By replacing

  cementing of the ejector discs, it is also possible to vary the maximum working width, so that,

  with the feed point offset and the replacement

  cementing the ejector discs, it becomes possible to

  cover working ranges from 12 to 36 meters.

  By adopting special limit ejector discs, it is possible to spread in addition on narrow strips of land. This spreader has the disadvantage of having to store at least two sets of ejector discs to cover a large range of working width, having to take them to have them available, and having to replace them each time according to the width of desired work. The same applies to the limit ejector disc, which must be stored separately. It could certainly be remedied, as is also known, by using an adjustable transmission, however such a transmission could not

  prevail in practice for cost reasons.

  Another known embodiment (EP 0 385 236) makes use of the advantages of a hydraulic drive of the ejector discs which are driven from the hydraulic installation of the tractor. The engine rotation speed

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  hydraulics can be changed without any problem.

  In the case of the known spreader for large working widths, a wide spreading product reservoir is provided, which has a bottom occupying the entire width and on the two outer ends

  from which the dosing openings are arranged.

  Above the bottom turn two transfer screws rotating in opposite directions, which transport the spreading product to the metering openings located outside. Reverse rotation screws are on a common drive shaft driven by a motor

  hydraulically arranged on one side of the tank.

  Below the metering openings placed outside are the ejector discs, each with its hydraulic motor, on a support arm pivotally mounted on the support frame of the spreader. By means of the pivoting support arms, the ejector discs can be moved relative to the dosing opening, thereby adjusting the feed point. In addition, the ejector discs can be rotated to a position in which they clear the space below the metering openings, to carry out a calibration test or to empty the tank. Thanks to the possibility of shifting the feed point and modifying the rotation speed of the ejector discs, it is possible to cover a wider working width range, for high spreading precision. In addition, these adjustment possibilities make it possible to envisage an adaptation to

different kinds of fertilizers.

  As a drawback, the relatively high manufacturing cost is first considered. In addition, the speed of rotation of the drive shaft of the transfer screws must be at least the value required when setting the maximum spreading quantity at the metering opening, to ensure the supply of that amount in the opening of

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  dosage. The spreading product is mechanically stressed during transport, by the action of

  transfer screw, so that the granular spectrum

  the variation varies from the initial state of the spreading product and, in addition, we see the appearance of undesirable fine grain. Consequently, the spreading product emitted has other sliding properties on the ejector disc and other flight properties than the spreading product as it was at the time of filling, so that the adjustments made on the spreader does lead to

  no reproducible spreading results.

  Finally, there is a spreader with two discs (DE 41 02 092) which constitutes the meeting of the two aforementioned productions in the form of a box. Sure

  the support arms, oriented towards the rear, of the frame-

  support you can insert either arm parts -

  support between which the transmission housing intended for the mechanical drive of the ejector discs is movable, or one can insert between the support arms a rigid crosspiece having parts of support arms, crosspiece on which arms are arranged in turn swivel and hydraulic drive ejector discs. The tank has two hoppers, so that the spreading product arrives at the metering openings substantially under the effect of gravity. In each hopper there is an agitator mechanism, the two being connected by an agitator mechanism shaft placed transversely. This shaft - as for publication EP 0 496 285 - is driven by a mechanical PTO, derived from the input shaft of the transmission. In the case of the variant with hydraulic drive of the ejector discs, only one end of the shaft is coupled to the cross member coupled to the PTO by the articulated shaft and from which the PTO is derived. the shaft of the agitator mechanism. The agitator mechanism is therefore driven in both cases

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  mechanically, the ejector discs being

  either mechanically or hydraulically driven.

  The construction cost of the hydraulic version for the drive and the weakening attributable to the box system of the support arms is disadvantageous, the support arms having to be designed to have a corresponding stability in terms of their various elements, which necessarily leads to heavier construction masses. In addition, the rotation speed of the agitator mechanisms is determined by that of the PTO, making it more difficult to comply with a low, desired stirring frequency.

  to save the spreading product.

  The object of the invention is to combine the principle, simple from the point of view of construction and operation, of the offset of the feed point, according to EP 0 496 285, with the simple principle of the rotation speed control by means of hydraulic motors according to EP 0 385 236, however avoiding

  at the same time the disadvantages of the two systems.

  Starting from the known spreader according to EP 0 496 285 this problem is solved by the fact that the ejector discs are each driven by a hydraulic motor disposed on the cross member and the speed of rotation of the two hydraulic motors being capable of being controlled separately. , in that the shaft of the agitator mechanism is driven by a hydraulic motor with constant rotation speed and all the hydraulic motors being connected to the hydraulic installation of the tractor, and in that the cross member has at its ends consoles , extending beyond the ejector discs and using which it is guided and can be positioned on

the support arms.

  Thanks to the hydraulic drive of the ejector discs, it is possible to obtain a regular spreading in connection with the offset of the feed point, by

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  sliding like a cross-member drawer, with a single spreader, without having to replace a disc, over a wide range of working width which extends, for example, over 12 to 36 meters. In addition, the offset of the feed point, for a given rotation speed, makes it possible to obtain an adaptation to the different sliding and flying properties of different kinds of fertilizers. Thanks to the additional arrangement that the hydraulic motors can be controlled separately, it is possible to obtain different ejection ranges on the two sides of the spreader, so that one can also spread on narrow and pointed strips of land, without having to use special discs. Since the agitator shaft is also driven by a hydraulic motor, and all the hydraulic motors are connected to the hydraulic system of the tractor, there is a unitary drive system for all the spreading work . The shaft of the agitator mechanism can then be driven, if necessary, by the insertion of a speed reduction transmission, at the correct speed.

  necessary to make the spreading product loose.

  The height of the construction unit in the area of the spreading unit is exclusively determined by the construction height given by the ejector disc and the hydraulic motor located below, since the consoles extend on each side of the discs

  ejectors, there is removal of an additional height

  silencing of construction attributable to the cross member and its guidance on the support arms. The consoles can be

  find in particular in the plan of the crosspiece.

  Compared with the known hydraulic embodiments, the pivoting arms and their pivoting bearings are eliminated because the adjustment possibilities thus obtained are replaced by an adjustment.

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  substantially linear of the cross, whether

  feed point offset or displacement

  ment of the entire spreading unit, in a position in which the spreading product can flow freely downwards. An advantageous embodiment is distinguished by the fact that the cross member, at its two ends, is movable over identical distances, parallel to the direction of travel, from an operating position in at least one other operating position with displacement of the point supply of spreading product to the ejector disc, the movement being made outward and / or against the direction of rotation, as well as displaceable from each operating position to a position freeing the space located below the metering openings, and that the rotational speed of the hydraulic motors of the discs

  ejectors is changeable, to adjust or maintain

  stick to a constant value, the working width,

  depending on the feed point offset value.

  The combination of the feed point offset and the rotation speed of the hydraulic motors can cover the entire width of the working range for all kinds of fertilizers

and all types of fertilizers.

  Preferably, one proceeds so as to make the cross-member adjustable so that in the case of small working widths, the point of supply of spreading product on the ejector disc is movable in the opposite direction of rotation and / or outwards with reduced rotation speed of the hydraulic motors and, for large working widths, it can be moved in the direction of rotation and / or inwards, with increased speed

rotation of hydraulic motors.

  A simple realization to manufacture for a

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  low weight is obtained in the case where the cross-member is produced in the form of a U-shaped profile open at the bottom, and the hydraulic motors of the ejector discs and the necessary hydraulic lines are arranged inside the U-shaped profile. hydraulic motor for the agitator shaft can be placed between the tank hoppers, therefore below the tank roof, where it is protected as much as possible against dirt ejected by the tractor wheels and particles of product spreading leaving the ejector disc, while still being easily accessible. The drive of the agitator shaft can be reduced by a spur gear transmission, driven by the output shaft of the

hydraulic motor.

  Consoles can either wrap around the arms-

  support, either cross them passing in

slots made therein.

  According to a preferred embodiment, a guide for the consoles is arranged in an adjustable manner. This guide can for example

  be constituted by a slide mounted on the arm-

  support so that it can be oriented

horizontally.

  This possibility of adjustment makes it possible to compensate for the tolerances encountered in the mechanically welded fabrication of the support frame and to obtain an always exact horizontal position of the console.

  and so the cross with the ejector discs.

  According to another advantageous embodiment of the invention, the slide has a guide slot substantially parallel to the direction of travel. In the guide slot of at least one slide engages at least one substantially perpendicular guide finger disposed on the console. This guide finger not only fulfills the role of

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  guide for the cross member when the feed point is offset, but at the same time constitutes a stop to prevent any displacement of the cross member

  transverse to the direction of travel.

  Preferably, the guide finger passes through the console with play. This play makes it possible to adjust the cross member and thus the ejection vanes in a basic position relative to the metering opening in the reservoir. Thus, one can compensate for the manufacturing tolerances encountered on the tank or on the tank bottom and the frame, as well as the mounting tolerances. After adjustment, the guide finger is locked in an undissociable manner on the console. Suitably, the console has at least one other slot, which extends substantially perpendicular to the guide slot of the slide, and a safety bolt, passing through the two slots is provided, which is elastically prestressed axially and fixes the crossbar. only

in vertical direction.

  Thanks to this arrangement, it is possible, on the one hand, to obtain the mobility necessary for the displacement of the cross member in the horizontal plane and, on the other hand, any vertical movement of the cross member

is excluded.

  To ensure the adjustment of the point of supply of spreading product on the ejector disc, means are provided on the support arm and on the console for positioning the cross-member in the horizontal plane. These positioning means preferably consist of a slide, guided along the guide parallel to the direction of travel and which can be locked in the desired position, and latching means acting between the latter and the console, means of which one is forced into the latching position by the force of a spring and

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  is likely to be released manually.

  While the manufacturing tolerances encountered on the welded construction of the frame are compensated by the possibility of adjustment of the guide, that the latter can be placed in a perfectly adjusted position, and that the slide guided on it can thus also be found in an adjusted position, the slider itself is used to adjust the position necessary to obtain the desired feeding point. In the adjusted position, the latching means are actuated automatically by the force of the spring, the console thus being fixed to the crosspiece. From this position, movement is only possible by manual actuation

  one of the snap-fastening means.

  According to another exemplary embodiment, at the end of the sliding travel of the cross member is provided a latching means fixed relative to the machine and cooperating with the latching means provided on the console, in a position of the casing in which the space below the metering openings is cleared. Therefore, the same latching means are used for adjusting the different operating positions and for the release position for carrying out the calibration test or for

emptying the tank.

  Advantageously, the latching means are arranged on the console on an actuating lever pivotally mounted on the console and placed under the effect of a spring force. The other way

  latching is arranged on the slide.

  The latching means may consist of an open latching slot, on the one hand, and a latching lug engaging therein, on the other hand, the latching slot being produced in such a way that the movable latching means freely arrives at the latching position, within 11 hrs 2768013

the effect of spring force.

  The cross beam positioning slide is associated with an adjustment scale fixed to the machine, the markings of which coincide with corresponding indications given in the spreading table, concerning the adjustment of the feed point. If the slide consists of a profiled sheet having in a horizontal branch the guide slot, the slide can be arranged below this branch and the latching means be arranged on the console, below the latter , so that the functional parts are protected as much as possible against the ejection of the

spreading product.

  According to another advantageous embodiment, an adjustment device associated with the metering openings is arranged on each side of the spreader and substantially above the console and the actuating lever, so that both the offset of the point d feed, that the adjustment of the metered quantity can be done on the same side, easily

accessible, from the spreader.

  The invention will be described below with the aid of exemplary embodiments illustrated in the drawings, in which: FIG. 1 represents a perspective view of the two-disc spreader, seen from the front; FIG. 2 represents a view of the crosspiece (without the brackets) with the ejector discs; Figure 3 shows a top view of the crossmember (without the brackets) with the ejector discs; FIG. 4 represents a partial view of the two-disc spreader seen from the rear; FIG. 5 represents a detail view on a larger scale of the spreader in the area of the

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  console, seen from above, and Figure 6 shows a detail view on a larger scale of the spreader in the area of the

console, seen from below.

  The two-disc spreader has a large-capacity spreading tank 1 which tapers downwards to form two hoppers 3, 4, constituting a tank roof 2. At the lower end of the hoppers are inserted, in slides 5, 6 extending transversely, hopper bottoms, not shown, each comprising a

adjustable dosing opening.

  The spreading product tank 1 is supported by a support structure comprising two main supports 7, 8 and two cantilevered upper arms 9, 10 arranged parallel to the direction of travel. The main supports 7, 8 and the cantilever arms 9, 10 are made of thick sheet steel, by laser cutting. At the rear ends of the cantilever arms 9, 10 is fixed the rear wall of the tank 1. The cantilever arms 9, 10 pass through their front ends 11, 12, the front wall of the tank and are

  welded in this place to the main supports 7, 8.

  The main supports 7, 8 are connected by a front cross member 13 produced in the form of a tube with rectangular or square cross section placed on the edge. Parallel to the main supports are arranged metal sheet brackets 14, 15 which, like the main supports, have superimposed transverse holes, intended for the connections of the lower articulated arms. The main supports 7, 8 and the brackets 14, 15 are folded outwards at their lower edges. In addition, the main supports have, at the level of the ejector discs described below, folds 16 oriented towards

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  the outside, which are used to fix a protection

of ejector discs.

  Above the cross member 13 are arranged two steel sheets 17, 18 parallel, laser cut, which are connected, on the one hand, to the cross member 13, on the other hand, to the tank roof 2 and constitute the connection of upper articulated arm for coupling

three points of the tractor.

  In the lower zone of the main supports 7, 8 are connected lateral supports 19, 20 protruding outwards, produced in the form of tubes of rectangular or square section arranged on the edge, while the space

  existing between the main supports 7, 8 is free.

  To the lateral supports 19, 20 are connected arms-

  support 21, 22 directed towards the rear, made of profiled steel sheets connected at their rear ends by a cross member 23 which can also be made of a profiled steel sheet. The lateral supports 19, 20 and the support arms 21, 22, as well as the cross-member 23, constitute a frame

  substantially horizontal perimeter.

  The spreading group to be inserted in this frame has a crosspiece 24 with two ejector discs which rotate below the metering openings and whose axes are placed eccentrically with respect thereto. As can be seen in FIGS. 2 and 3, the cross-member 24 is produced in the form of a U-shaped profile open at the bottom, in which hydraulic motors 27, 28 are inserted from the bottom and pass through, through their shaft. output, the back 29 located at the top of the U-shaped profile. The ejector discs 25, 26 are then mounted on the output shaft. Inside the U-shaped cross member 24 are installed the hydraulic supply lines 30 and the hydraulic return lines 31, the latter being

  transformed into a common collector pipe.

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  The crosspiece 24 has at its opposite ends brackets 32 which, in the embodiment of Figure 1, pass through slots 33 formed in the support arms 21, 22. In the slots 33, the console is movable in a horizontal plane , to move the feed point, or to shift the crosshead to a position allowing a calibration test or emptying. To this end, a guide 34 (FIG. 1) is arranged in an adjustable manner on the outer face of the support arms 21, 22, which has a guide slot 35 in a horizontal upper branch. The console 32 is guided in a movable manner. means of bolts in this guide slot. On the vertical branch of the guide 34 is guided in elongated holes 37, 38, a slider 36 which has a latching lug 39. The latching lug 39 can be adjusted by moving the slider 36 in different positions, from corresponding to the desired feed point. These positions are

fixed with knuckle screws 40.

  On the console 32 is mounted tilting an actuating lever 42 controlled by a spring. A fold 41 made on the console is associated with it by way of a combined grip. The actuating lever 42 has another latching means produced in the form of a latching slot which is adapted to the shape of the latching lug 39. By pivoting the actuating lever 42, the slot can be released from the latching pin 39 while it

  engages under the action of the spring.

  Thus, while the adjustment of the feed point is effected by an adjustment of the latching pin 39, it is possible, after pivoting of the actuation lever 42, to move the entire casing, while preserving the adjustment of the feeding point, in a

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  position in which the dosing opening is cleared, for example to carry out a calibration test, or to be able to empty the residues out of the tank. Another embodiment concerning the adjustment of the feed point will be

  described below with reference to Figures 5 and 6.

  As seen in Figure 4, in each hopper 3, 4 of the tank 1, shown bottomless in Figure 4, are arranged directly above the metering openings, agitating mechanisms 43 driven by a mechanism shaft agitator 44 placed transversely under the tank roof 2. The shaft of the agitator mechanism 44 is guided by bearings

  tubular 45, 46 passing through the walls of the hopper.

  On a support console 47 located under the roof of the tank 2 is fixed a hydraulic motor 48 connected

  by supply and return lines 49 to the installation

  hydraulic linkage of the tractor. The hydrau-

  lique 48 drives the shaft of the agitator mechanism 44 to

  a constant and low rotation speed, through

  midpoint of a spur gear transmission 50. In the embodiment of Figures 5 and 6, the console 32 covers

  the support arm 22, and the guide 34, the horizontal branch of which the guide slot 35 is formed projecting outwards, is adjusted in such a way that this

  branch is always above the arm-

  support 22. The console 32 has in the central zone a hole 60 crossed with play by a not shown guide finger, which also engages in the guide slot 35 formed in the guide 34. The play serves to adjust the ejector discs compared to

  dosing openings, in a basic position.

  Then the guide finger is locked on the console 32. In addition, the console 32 has two

  longitudinal slots 61, 62 which extend sensi-

  completely perpendicular to the guide slot 35 and

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  which are also crossed by axially elastically prestressed bolts. The longitudinal slots 61, 62 offer the degree of freedom necessary during the pivoting of the casing and the bolts passing through them ensuring the console and the casing 29

against vertical displacement.

  In this exemplary embodiment, the latching means is produced on the slide 36 in the form of a latching slot 63 while, on the actuating lever 42, a latching lug 64 is provided in the form bending of the actuation lever. The actuating lever 42 is pivotally mounted at 65 on the underside of the console 32 and placed under the effect of a tension spring 66, which pushes the latching lug 64 into the slot

snap 63.

  In the rear zone of the guide 34 is arranged, fixed to the machine, a latching slot 67 in which the latching lug 64 engages when the casing 29 is moved into a position which clears the space.

  below the dosing openings.

  In the representation of FIG. 6 are visible on the vertical branch of the guide 34 several holes 68 which serve for its adjustment to the support arm 22. To allow an exact adjustment of the feed point according to the indications given on a spreading table , with the slide 36 is associated an adjustment scale 69 fixed to the machine (FIG. 5) connected to the slide 34 for example to the lower branch, visible in the embodiment of FIG. 1, of the U-shaped slide In the embodiment of Figures 5 and 6 is fixed on the guide rail 34 a bracket 70 which has a band folded outwards, intended to support

scale 69.

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Claims (23)

  1. Two-disc spreader, equipped with a support frame, supported by a three-point hitch of a tractor, a spreading product tank (1) with two hoppers (3, 4) tapering towards bottom each to a dosing opening, each   having an agitating mechanism (43) arranged above   above each dosing opening and fitted with a common agitator shaft (44), oriented transversely, and each having an ejector disc (25) arranged under the dosing openings, the two ejector discs being driven from the tractor and arranged at a great distance from each other, on a cross member (24) placed transversely to the direction of travel, the cross member being guided in a movable manner in the horizontal plane and being capable of being fixed on two support arms (21 , 22) oriented towards the rear, roughly parallel to the direction of travel, of the support frame, to ensure the offset of the ejector discs relative to the metering openings, characterized in that the ejector discs (25) are each driven by a hydraulic motor (27, 28) arranged on the cross-member (24) and that the rotation speed of the two hydraulic motors can be controlled separately, in that the shaft (4 4) of the agitator mechanism is driven by a hydraulic motor (48) at constant rotation speed and that all of the hydraulic motors are connected to the hydraulic installation of the tractor, and in that the cross member (24) has at its ends consoles (32), extending beyond the ejector discs (25) and with the aid of which it is guided   and can be positioned on the support arms (21, 22).   2. Two-disc spreader according to claim 1, characterized in that the cross-member (24) is displaceable at its two ends over identical distances, parallel to the direction of travel, 18 2768013   from an operating position in at least one other operating position with displacement of the point of supply of spreading product on the ejector disc (25), the displacement being made towards the outside and / or vice versa rotation, as well as movable from each operating position to a position clearing the space below the metering openings, and in that the speed of rotation of the hydraulic motors (27, 28) of the ejector discs is modifiable, in order to adjust or maintain a constant value, the working width, according to the value of the offset of the feed point.   3. Two-disc spreader according to claim 1 or 2, characterized in that the cross-member (24) is adjustable so that, for small working widths, the point of supply of spreading product on the ejector disc ( 25) either displaceable opposite to the direction of rotation and / or outward with reduction in the rotational speed of the hydraulic motors (27, 28) and, for large working widths, or displaceable in the direction of rotation and / or inward, with increased   rotational speed of hydraulic motors.   4. Two disc spreader according to one   any one of claims 1 to 3, characterized in that   that the cross-member (24) is produced in the form of a U-shaped profile open at the bottom, and in that the hydraulic motors (27, 28) of the ejector discs (25) and their hydraulic lines (30, 31) are arranged inside the U-shaped profile. 5. Two disc spreader according to one   any of claims 1 to 4, characterized in   that the hydraulic motor (48) intended for the shaft (44) of the agitator mechanism is disposed between the hoppers (3, 4) of the tank (1).   6. Two disc spreader according to the 19 2768013   claim 5, characterized in that the hydraulic motor (48) drives the shafts (44) of the agitator mechanism by means of a transmission with spur gear (50).   7. Two disc spreader according to one   any one of claims 1 to 6, characterized in that   that the brackets (32) of the crosspiece (24) cover the support arms (21, 22).   8. Two disc spreader according to one   any one of claims 1 to 6, characterized in that   that the brackets (32) of the crosspiece (24) pass through the support arms (21, 22) passing through slots (33).   9. Two-disc spreader according to claim 7 or 8, characterized in that a guide (34, 35) intended for the consoles (32) is arranged   adjustable way on the support arms (21, 22).   10. Two disc spreader according to claim 9, characterized in that the guide is   constituted by a slide (34) mounted on the arm-   support (21, 22) so that it can be oriented in a horizontal plane.   11. Two-disc spreader according to claim 10, characterized in that the slide (34) has a guide slot (35) substantially parallel to the driving direction and in that at least one guide finger substantially perpendicular on the console (32) loosely engages the guide slot of at least one slide.   12. Two disc spreader according to one   any one of claims 1 to 11, characterized in   that the guide finger constitutes at the same time a stop to prevent any displacement of the crosspiece (24) transversely to the direction of travel. 13. Two disc spreader according to the 2768013   claim 11 or 12, characterized in that the guide finger passes through the console (32) with play and, after adjustment of the crosspiece (24), or of the ejector disc (25), can be fixed on the metering opening of the tank (1). 14. Two disc spreader according to one   any one of claims 7 to 13, characterized in that   that the console (32) has at least one slot (61, 62), extending approximately perpendicular to the guide slot (35) of the slide (34), and that a safety bolt is provided passing through the two slots (35) or (61, 62), elastically axially prestressed and fixing the crosspiece (24) in the vertical direction. 15. Two disc spreader according to one of the   claims 1 to 14, characterized in that, for   ensure the adjustment of the point of supply of spreading product on the ejector discs (25), are arranged on the support arm (21) or (22) and on the console (32) means intended to position the   crosspiece (24) in the horizontal plane.   16. Two disc spreader according to claim 15, characterized in that the positioning means consist of a slide (36), guided parallel to the direction of travel on the guide (34) and can be fixed in the desired position , and latching means (39, 63, 64), acting between this slide (36) and the console (32) and one of which (42, 64) is forced into the latching position by the force d '' a spring (66) and manually releasable.   17. Two disc spreader according to one   any of claims 1 to 16, characterized in   that at the end of the sliding travel of the crosspiece (24) is provided a latching means (67) fixed relative to the machine and cooperating with the latching means (42, 64) provided on the console 21 2768013   (32), in a position of the crosspiece (24) in which the space is below the openings metering is released.   18. Two-disc spreader according to claim 16 or 17, characterized in that the latching means (64) are arranged on the console (32) on an actuating lever (42) pivotally mounted on the console (32) and placed under the force a spring (66).   19. Two disc spreader according to one   any of claims 16 to 18, characterized in   what the other snap means (39, 63) is disposed on the slide (36).   20. Two disc spreader according to one   any of claims 16 to 19, characterized in   that the latching means consist of a latching slot (63) open, on the one hand, and a latching lug (39, 64) engaging in this one, on the other hand.   21. Two disc spreader according to one   any of claims 16 to 20, characterized in   what an adjustment scale (69) fixes relative to the   machine is associated with the slide (36).   22. Two disc spreader according to one of the   claims 10 to 21, characterized in that the   slide (34) consists of a profiled sheet having in a horizontal branch the guide slot (35), and in that the slide (36) is arranged below this branch and the latching means (39) , respectively (63, 64), being   arranged on the console (32), below the latter.   23. Two disc spreader according to one of the   claims 1 to 22, characterized in that a   adjustment device associated with the metering openings is arranged on each side of the spreader and somewhat above the console (32) and the lever actuation (42).