FR2600231A1 - Improvements to planters for seeds under mulching with a burying film cutter - Google Patents

Abstract

The improvements are characterised in that, on the movable part of the cutting mechanism, one end of a rod 9 is mounted so as to be driven by it, the other end of this rod is articulated onto one arm 12 of a rammer gear whose second arm 14 has a length which is slightly greater than that of the radius of the compacting wheel or roller 6 and whose end is turned up into a round stud with a pointed end 14' and that the rammer gear is pivoted on a fixed shaft 12' parallel to the axis of the compacting wheel and at some distance above the latter. This synchronisation between the rod 9 and the film cutter 3-4 thus holds the film 7, without special manipulation, against the wheel 6, which simplifies and improves the manufacture of the seed planters and their manoeuvring at the end of rows.

Description

The invention relates to improvements to gratin seeders with mulching with an entrapment film cutter. It also relates to seeders equipped with these improvements.

For a long time, seeders under mulch have been equipped with a film-cutting device, but it has quickly been found that a particular organization is necessary to avoid the floating of the free end of the cut film not yet deposited on the ground. Numerous means are known for avoiding the need for long manual operations to maintain the free end of the film and ensure that it is put in place after an interruption in sowing, in particular at the end and beginning of rows. Known film cutters are either vertically movable blades or blades swiveling forwards or backwards to ensure the cut at the desired time.

Maintaining the free end of the film has thus already been ensured using pads applying by gravity to the end of the film remaining wound after cutting. It has also been proposed to apply the free end of the film against its unwinder-applicator roller, by blowing a stream of air in the direction of the carrier roller. I1 has also been proposed to apply elastically a plate of radius equal to that of the roller to obtain the maintenance of the film as b in during its course as after its cut. All these provisions effectively contributed to facilitate and simplify to some extent l 'obtaining the desired result; however this maintenance of the film with a view in particular to its good presentation for the rest of the sowing operations, is obtained more or less well from independent cutting and holding means respectively. The price of the equipment and handling still required remained high, in particular because of the care to be taken. The present invention proposes to eliminate these drawbacks so as to advantageously obtain better results, in any case at least equivalent, than the best known devices, in colts and in time. The invention is based on the idea of directly using the cutting mechanism to actuate the film holding mechanism.

For this purpose, a seeder under mulch comprising compacting rollers, applicator unwinder with possibly sealing wheels, a film cutter and means for holding the free end of the unrolled cut film against the roller or the sealing wheel. according to the in-vention by the fact that on the movable part of the cutting mechanism
is mounted to be driven by it one end of a connecting rod, that the other end of this connecting rod is articulated on an arm of a bell return whose second arm is
of length slightly greater than that of the radius of the press wheel and whose end is turned back in a round picot with a tapered point, and that the top of the bell return pivots
on a fixed axis, at a certain distance above and parallel to the axis of the press wheel. Under these conditions, the
displacement, vertical or circular, of the cutting member,
causes the second return arm to pivot down,
so that the pin maintains between it and the press wheel the free end of the unwound film. This result is obtained
without the intervention of a particular command - which would generally be by additional cylinder - of the holding member and
therefore without special maintenance operation from the panel
of edge.

In the accompanying drawing, there is shown an embodiment of the improvement according to the invention in the case where the
cutting moves circularly for cutting the film and burying the end of the film.

The single figure is a schematic view in vertical section
of the simultaneous control device in question.

On the frame 1 of the seed drill, is mounted the roller 2 film holder,
and at the rear end the cutting mechanism 3, the saw 4 of which can pivot around the axis 5 by any known means for cutting and burying. We also see the press wheel 6 carried on an arm 6 'in the known manner. The film 7 is cut by moving the saw 4. In the cutting member 3 is provided a passage eye 8 for the connecting rod 9, with springs 9 'between shims 10. The other end of the connecting rod 9 is pivotally mounted on an axis 11 fixed to the end of the arm 12 of a
return of a bell journalled by its top 12 ′ on a fixed shaft 13; the other arm of the reference 14 terminates in a tapered round pin 14 'turned towards the line 6; the shaft 13 of the pivoting of the return is carried by a fixed arm 15 mounted
on the shaft of the press wheel or unwinding roller.

The arm 14 may be a stirrup then terminated by the stud 14 ', and the same is true for the arm 12 of the bell return.

It is immediately seen that the connecting rod 9, and therefore the said reference - or synchronization reference - causes, when the film cutter 3-4 is moved rearward by its control jacks, the arm 14-14 'switches "towards the front "and wedges the film 7 under the press wheel (or the applicator roller) see dotted the film 7 is therefore well held against the wheel or the roller, without any manipulation being necessary, to" catch up "the film not unrolled.

It will be noted that the springs 9 'on either side of the eye 8 for passage of the connecting rod 9 can, either, retract when an obstacle is opposed to the passage of the displaced pin 14' towards the press wheel: raising the seed drill assembly, thus releasing the obstacle, the spring 9 'remains in thrust and the pin 14' is forced to pass under the wheel or the roller.

To the economy of manpower is added that of the equipment since, only the jacks controlling the film cutter are sufficient to actuate, and this simultaneously, the holding device.

We can adjust the action of the rod 9 on the bell return by screwing it more or less in the passing eye. The length of the stirrup 12-14-14 'is such that the arm 14 is a little longer than the radius of the press wheel or the press roller; this determination is made by a few simple tests.

The improvement according to the invention easily adapts to seeders with "swivel" cut as well as those with "vertical" cut.

Claims (3)

1. Improvements to grain seeders under mulch comprising compacting rollers, unwinder-applicator with possibly press wheels, a film cutter and means for holding against the press wheel or the applicator roller, the free end of the cut film not unwound, these improvements being characterized in that, on the movable part of the cutting mechanism is mounted to be driven by it one end of a connecting rod 9, the other end of this connecting rod is articulated on an arm 12 of a bell return which the second arm 14 is of a length slightly greater than that of the radius of the wheel or of the roller 6 and the end of which is turned back in a round pin with a tapered tip 14 ′, and that the bell return is pivoted on a fixed axis 12 'parallel to the axis of the press wheel at a certain distance above the latter. 2. Improvements according to claim 1 characterized in that the connecting rod 9 passes through an eye 8 of the mobile cutting mechanism 5-4, two springs being respectively mounted on the connecting rod between the eye 8 and two shims 10. 3. Seed drills equipped with one of the preceding claims.