FR3024816A1 - INSTALLATION AND SYSTEM FOR DISPLACING PLANTS FOR GROUND CULTIVATION - Google Patents

Abstract

The present invention relates to an installation for aboveground cultivation, comprising a plurality of juxtaposed systems each ensuring the displacement of plants on a production line (1). The plant displacement systems are configured to move a plant between a feed end of said production line (1) and a picking end of said production line (1) for a period corresponding to the maturation period of said plant, and to change the distance between two consecutive plants in at least one of the longitudinal or transverse axes on at least part of said production line (1).

Description

FIELD OF THE INVENTION The present invention generally relates to the field of belt conveyors for moving articles on a processing plant. More particularly, the invention relates to a belt conveyor for the movement, in particular of plants and plants and their possible support in an above-ground culture plant, including but not limited to salads. Optionally, the plant includes means for feeding the plant roots with a nutrient mist produced by a mist. The field of the invention also extends to the culture of other living species, for example stem cells. Above ground cultivation makes it possible to control all the elements necessary for the development of plants: temperature and hygrometry, pH and nutrients (water, mineral salts and trace elements). Its advantages are to limit water consumption and soil pest attacks (which allows reduced and targeted phytosanitary treatments), to accelerate the plant growth process, to optimally control the cultivation parameters. . State of the art Concerning the displacement of articles with a variable spacing, patent EP1914181 describes a solution for transporting discrete objects by a variable pitch screw which receives the elements downstream of a feed device. elements. The screw has a peripheral groove in which the articles are housed and offset so that a pitch between the articles received by the screw is increased downstream of the screw to an intermediate pitch. The articles are transferred and grasped by the intermediate height by a height-changing gear which transfers the articles into a device, for example the receiving container processing station, with a final height. Regarding the application to the variable pitch displacement of a culture medium, it is known from the international patent WO 2013136014 which relates to aeroponic culture equipment comprising a plurality of substrate blocks intended to receive at least one seed and to ensure the maintenance of the plant during all of its growth, the dimensions of the substrate block being fixed and determined so as to allow the growth of the vegetation on one side and the roots of the other and the cross section of said substrate block being between 1 , 2 and 10 times the nominal section of the collar of the adult plant. A movable support having housings receives movable substrate blocks by transverse displacement. The equipment described comprises means for modifying the spacing of the consecutive substrate blocks during the growth of the plant, said housing being open at the top to allow the passage of vegetation and at the bottom to allow the passage to roots. Also known is US5136804 which describes an aeroponic culture apparatus comprising a module separator defining an upper compartment and a lower compartment, said separator comprising support means 30 of a plurality of plants. The apparatus further comprises a mist generator consisting of an ultrasonic transducer immersed in a water tank and conduits carrying the fog at the compartments of the module. International patent application WO / 1998/056237 discloses a modular structure designed for aeroponic crops and composed of a plurality of prefabricated side panels for receiving plant cultures, as well as a plurality of bases. prefabricated plates to which the side panels are coupled via respective locking elements, so as to create a structure 5 having substantially the shape of a V upside down, wherein the side panels are coupled to each other along a top ridge line by respective ridge, a pumping unit and a spraying apparatus are also part of the assembly and serve to feed the interior of the atomized nutrient solution structure. International Patent Application WO 2004/040962 discloses an aeroponic culture apparatus comprising a novel low pressure liquid nutrient supply system using a rotating roller apparatus. The rotating roller apparatus diffuses a liquid nutrient solution onto the plant roots via centrifugal force, thereby eliminating the use of a pump and high pressure nozzles. Semi-automatic culture solutions also exist, as described in the expired patent US4352256. The potted plants are arranged in troughs mounted on a conveyor belt allowing the plants to be treated to be conveyed to a central processing hall where the plants are then manipulated manually. Disadvantages of the solutions of the prior art The solutions of the prior art have several drawbacks.

Firstly, their complexity linked to a large number of moving parts makes them poorly suited to installations that must operate under relatively aggressive conditions (humidity, dirt, continuous operation for cycles of up to several weeks between germination and harvesting). , -). In the second place, these solutions are expensive to achieve and maintain, and the investment is difficult to depreciate for uses such as low-margin salad culture.

Thirdly, the solutions of the prior art occupy a large floor area, relative to the cultivation surface, which implies high energy consumption and difficulties for sanitary, thermal and hygrometric control of crops.

SUMMARY OF THE INVENTION The present invention aims to remedy these drawbacks by proposing, in its most general sense, an installation for above-ground cultivation, comprising a plurality of juxtaposed systems each ensuring the movement of plants on a line of production, characterized in that said systems are configured to move a plant between a feed end of said production line and a withdrawal end of said production line for a period of time corresponding to the ripening time said plant, and to change the distance between two consecutive plants in at least one of the longitudinal or transverse axes on at least part of said production line.

According to a first variant, said production line consists of at least one rail and a plurality of transverse pallets movable on said rail, and having receptacles for housing at least one aeroponic cell of a plant, the installation further comprising means for changing the distance between two consecutive culturing cells along at least one of the longitudinal or transverse axes on at least part of said production line. Advantageously, said transverse vanes have teeth forming secondary rails for the longitudinal displacement of a mobile cell longitudinally between two adjacent secondary rails.

According to another variant, the invention relates to an installation for the above-ground cultivation of plants, comprising a plurality of juxtaposed systems each ensuring the displacement of plants on a conveyor belt, characterized in that said systems are configured to ensure displacement. a plant between a feeding end of said conveyor belt and a sampling end of said conveyor belt, for a period corresponding to the maturation period of said plant, and for modifying the distance between two consecutive plants according to at least one one of the longitudinal or transverse axes. This solution makes it possible to gradually space the plants during their growth, makes it possible to increase the vegetal surface density, and thus to increase the productivity. Higher plant density allows better use of light, water, nutrients, and other resources. According to a first variant, said plant displacement systems comprise a conveyor belt having a plurality of extension elements located on the belt, in a reversible manner, and means for actuating said elements, distributed over the length of the belt system. drive the web, to ensure a change in the spacing of two consecutive articles during the scrolling of said web.

According to a second variant, said plant displacement systems comprise a conveyor belt having a plurality of extension elements located on the belt, in a reversible manner, and actuating means movable with respect to said conveyor belt to ensure A change in the spacing of two consecutive articles during the scrolling of said strip. According to a third variant, said plant displacement systems comprise a conveyor belt having a plurality of partial winding elements of the strip, and means for actuating said elements, distributed over the length of the drive system of the belt. strip, to ensure a change in the spacing of two consecutive articles 10 during the running of said strip. According to a fourth variant, said plant displacement systems comprise a conveyor belt having a plurality of partial localized folding elements of the strip, and means for actuating said elements, distributed over the length of the drive system of the belt. band, to ensure a change in the spacing of two consecutive articles during the scrolling of said band.

According to another variant, the supply ends of a first series of said displacement systems are arranged on the side of the sampling ends of a second series of displacement systems, the longitudinal axes of the first series displacement systems. forming an angle between -15 and +150 with the longitudinal axes of the displacement systems of the second series. According to another variant, the transverse distance between the median longitudinal axes of two adjacent displacement systems is smaller than the section of a mature plant and in that said adjacent displacement systems are offset longitudinally by a length corresponding to half of a mature plant.

The invention also relates to a plant moving system comprising a conveyor belt having a plurality of partial winding elements of the web, and means for actuating said elements, distributed over the length of the webbing system. drive the web, to ensure a change in the spacing of two consecutive articles 5 during the running of said web. The invention also relates to a system for moving articles on a variable-pitch conveyor belt characterized in that said strip has a plurality of partial winding elements of the strip, and means for actuating said elements, distributed along the length of the tape drive system, to provide a change in the spacing of two consecutive articles during the running of said tape.

The conveyor belt performs several functions: - the support of the articles, for example the culture supports and the crops which are distributed along the length of the strip - the driving of the articles on the treatment plant, for example for the aeroponic treatment during all phases of plant growth - the centering of supports relative to the longitudinal axis of the plant - the definition of the spacing between two consecutive articles, with the possibility of varying this spacing by winding or local unwinding of the strip, having the effect of lengthening or shortening locally the band segment upstream and downstream of the winding element, and thus to bring the two articles arranged on the side and to move them apart locally; of the winding element - optionally, and especially for hydroponic or aeroponic plant applications, the separation of the lower volume of the installation, intended for aeroponic vaporization on the root system of the plants and the upper volume of the plant where the foliage develops, that it is preferable to preserve liquid projections. The separation also aims to achieve darkness in the root moist environment, in order to avoid the development of algae. Advantageously, said partial winding element is constituted by a transverse roll fixed on said strip, said roll exhibiting local rotary drive means for winding or unrolling a web segment either side of the axis of rotation of said roller. According to a preferred embodiment, said partial winding element is constituted by a transverse roller locked in rotation with the exception of tilting zones distributed over the length of the drive system 15 of the strip. According to one variant, the rotation of said winding element is ensured by the mechanical interaction of said element with at least one tilting zone provided on a translation guide means.

According to another variant, the winding element is constituted by a split roller enclosing a cross section of said conveyor belt, and having guiding protrusions interacting with at least one longitudinal guide rail having a plurality of control zones. the rotation of the winding elements. According to another variant, said guide protuberances are constituted by a transverse shoulder of non-circular section, and said control zones are constituted by enlargements of a longitudinal guide slot 30 having a height greater than the largest section of said shoulder. Advantageously, said guiding protrusions have a polygonal section with N edges, N being between 2 and 4.

According to an alternative variant, the winding element is constituted by a roller enclosing a transverse section of said conveyor belt, and having a ratchet wheel, the release of the ratchet being controlled by a member interacting with at least one complementary activation means provided on a longitudinal guide rail.

Alternatively, the winding element is constituted by a roll extended on either side by a cylindrical end of parallel but opposite axes.

Advantageously, the cylindrical end pieces serve as an axis of rotation for pedals which are moreover enslaved in absolute orientation by a small local angle of each longitudinal guide rail relative to the horizontal.

According to one variant, the right and left longitudinal guide rails are alternately one or the other at the bottom or at the top, the maximum variation between the two altitudes coinciding with the distance between the axes of the cylinders carrying the right and left pedals. providing, by means of a pedal movement, the longitudinal movement, a rotation of the roller acting as a crankshaft. Preferentially, the conveyor belt is configured to allow the insertion of plant culture support. Advantageously, the installation further comprises a spraying means directed towards the lower part of the production line. Preferably, said spraying means is supported by a longitudinally movable carriage, and said carriage comprises means for actuating at least one culture cell. According to one variant, the installation comprises a plurality of systems for moving culture supports on a conveyor belt, said belt having a plurality of elements for partial winding of the belt, and means for actuating said elements, distributed over the length of the drive system of the band, to ensure a change in the spacing of two consecutive articles during the running of said band.

The preferred application of the present invention is to move salads into a greenhouse as they grow, so as to occupy as little space as possible while having sufficient spacing between neighboring salads. The invention thus presents itself as a mechanized logistics system. Several constraints to obtain quality salads must be respected, such as the control and maintenance of light conditions, humidity and temperature, possibly different in the environment of the roots and in the environment of the leaves, or as 20 not to damage the leaves. Finally, the system must meet economic and industrialization constraints to be viable. For this purpose, the invention relates to a system characterized in that the conveyor belt is configured to allow the insertion of plant culture support. Preferably, at least one system has a longitudinal axis diverging from the longitudinal axis of an adjacent system, at least two systems of the installation comprising strips moving in opposite directions.

According to an advantageous embodiment, the system according to the invention further comprises a spraying means directed towards the lower part of the conveyor belt.

Preferably, said spraying means is supported by a longitudinally movable carriage, said carriage 3024816 comprises means for actuating at least one culture cell. The invention particularly relates to an aeroponic salad culture plant characterized in that it comprises a plurality of media carrier displacement systems on a conveyor belt, said strip has a plurality of partial winding elements of the conveyor belt. strip, and means for actuating said elements, distributed along the length of the drive system of the strip, to ensure a change in the spacing of two consecutive articles during the running of said strip. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The present invention will be better understood on reading the following description, with reference to a nonlimiting exemplary embodiment illustrated by the appended drawings in which: FIG. 1 represents a schematic view 2 is a schematic view of a portion of the web and rolls in a longitudinal sectional plane; FIG. 3 is a diagrammatic view of a portion of the web. A guide rail according to a longitudinal sectional plane - FIG. 4 is a schematic view of an alternative embodiment - FIGS. 5 to 8 show top views of an installation, according to different configurations and implantation of the conveyor belts. Figure 9 shows a schematic view of another alternative embodiment. The plant according to the invention is intended for the hydroponic or aeroponic culture of plants whose volume evolves significantly between the seed and the mature variety. 3024816 - 12 - This is for example salads, whose seed is tiny, but as and when growth occupies a considerable volume, with a footprint of a section of about thirty to fifty centimeters , depending on the variety grown. To optimize the installation, the salads must be very close at the beginning of the cycle, so as not to occupy unnecessarily a floor space. But during growth, it is necessary to move away consecutive plants to allow a blossoming of the vegetation.

10 Aboveground cultivation is divided into two categories: pond or gutter. Basin hydroponics consists of floating plants in shallow basins, much like water lilies or lotuses. The water of the basin, added with 15 nutrients, ensures the irrigation and the contributions to the plants. Plants can be translated effortlessly into the pond by various guidance systems. One of them uses the current. The plants are grouped in floating boxes, and driven by the current. Arrived at the end, and having had time to grow, they are transplanted by hand into other floating boxes in which they are less tight. Hydroponic gutter cultivation involves placing the plants in gutters in which a stream of water and nutrients feeds the roots. It is possible to translate the gutters perpendicular to their length and spacing them gradually in this direction of translation.

Growing plants in a greenhouse at least 2 to 4 of their root-to-ground diameter during growth calls for solutions to space these plants progressively, in order to optimize not only the surface area (and thus the productivity of the plant). of the greenhouse) but also the resources consumed, mainly water and light. 3024816 - 13 - Solutions that are accessible at a reasonable cost perform spacing in one dimension, but not in two dimensions.

It is also possible to partially superimpose plants in height, but these systems are generally fixed, or require a large permanent consumption of artificial light. At the current cost of artificial light, although the trend of lighting equipment such as LEDs or oleds is on the downside, for an upward yield, with simultaneous upward electricity costs also, these systems are not yet competitive. One aspect of the invention concerns the optimization of the footprint of the treatment plant, in particular the installation using such conveyor belts. Figure 1 shows a schematic view of an installation according to the invention.

It comprises culture lines equipped with a strip (1) running between two lateral rails (2, 3). A cultivation line is several meters long, the web (1) moving at a low speed so as to travel the length of the line in seven weeks, the time required for the growth of a salad until reaching its maturity. . Depending on the variety of salad or plant, this duration varies of course, typically between 3 and 10 weeks or more. The strip (1) is made of a polyurethane or PVC fabric approximately eight centimeters wide. This band (1) has openings (4, 5) of square section, for positioning a culture medium. The culture support is for example a block with a square section made of a porous material, for example a block of rock wool. This block has a peripheral edge bearing on the periphery of the opening (4, 5) of the strip. The object of the invention is to allow a modulation of the spacing of two consecutive lights (4, 5). For this, the strip has segments (6) which are either wound around a roller (7), or passing simply 5 without winding a roller (8). When winding this segment (6) on the roller (8) the spacing between two consecutive lights (4, 5) is reduced. When this segment (6) is released by unrolling the roll (8), the distance between two consecutive lights (4, 5) 10 is increased. Figure 2 shows a sectional view of the rollers (7, 8) and the strip (1). The rollers have slots (11, 12) traversed by the band (1). The band is locked at this slot (11, 12) to prevent slippage of the band relative to the roll (7, 8). The rollers (7, 8) are extended with guiding protrusions (9, 10) guided by a groove (provided on the vertical blank of the rails (2, 3) as shown schematically in FIG.

These protuberances have a multi-lobar shape, in the example with three lobes (14 to 16) moving in the groove (13) by sliding. For 3 lobes, the rotation frees 4 pi / 3 radius, spacing (and 4 pi / n for n lobes).

The width of the groove is determined to allow sliding under the effect of the traction exerted on the band (1), without being able to pivot. The rail has in certain places a pivoting zone (17) where the upper side has a boss (18), as well as the lower sidewall 30 has a second boss (19), these two bosses defining a local divergence increasing the distance between both flanks of the rail so as to allow the tilting of the multi-lobar extension, before coming again in an area where the flanks are parallel and prevent pivoting. This solution consisting in using plants (especially salads) adjacent diverging ray trajectories, we kept the essence, while inventing a realistic implementation in a rectangular zone. Figures 5 to 8 show alternative arrangements of facilities with conveyor belts arranged in bundles. The available rectangular space is occupied by juxtaposed systems placed head to tail two beams emanating from two opposite directions. Thus, the translation of each salad is accompanied by a progressive spacing during its course. Two salads following each other on the same shelf will always be nearby, although growing, for example from an average diameter of 10 cm at the beginning to an average diameter of 30 cm at the end. The aeroponie imposes an additional constraint compared to potted plants translated on a carpet. The roots can go down to about 50 cm below the seed (or more), located at the level of the support by which the plant can be caught. It is thus necessary to be able to translate an object which extends in height until 30cm above its support, in width a radius of 15 cm around the vertical axis related to its support, and in depth up to 50 cm in below its support. The device must therefore consist of a rail and possibly a second rail, defining the path (as the rails of a train), but without any cross (because they prevent the roots from passing). Along the path defined by this or these rails, we find the supports each attached to a salad near its seed, enclosed in a block. Each support will be able to slide or roll on the rails. If there are two rails, one on each side of the bracket, they will be held in place from the outside. But the supports can possibly help to maintain the parallelism of the rails. A system is possible with a single rail but may pose problems of imbalance if a lack of rigidity. The invention makes it possible to produce this system. This system consists in designing a rail whose profile guides by its simple geometry a part translating parallel, while imposing a certain location a rotation.

The guiding protrusion may also have two lobes only. In this case, the rotation about an axis perpendicular to the direction of translation will cause the unwinding of the strip (1) fixed to the axis and wound on the roller (20) by a half-turn. In the middle of these strips, 10 between two axes, will be attached a support carrying the salad. Thus a half turn of the axis will cause a pi.r elongation of the non-wound portion of the strip (1) connecting it to each of the neighboring axes. The supports on either side of the axis will therefore be spaced 2 pi.r / n, or for example for an axis diameter of 5 mm, about 1.5 cm. Several embodiments of this rotational movement controlled and generated by the translation, finally allowing to obtain the equivalent of a treadmill or a variable speed transmission chain, are possible.

FIG. 4 shows how to impose by three different sections in which sliding cams (21 to 23) linked, namely two circular cams (21, 22) and a cam (23) having the shape of the convex envelope of two cams, slide. circular (21, 22). The three cams are fixed to each other so as to project perpendicularly in FIG. 4. The trajectories of the three cams (21 to 23) are imposed by the contour of the section in which each can slide. When this contour is a simple rail the three cams slide in translation. When this contour opens (as in the center of Figure 4) and allows the oblong cam to rotate around its center of gravity, the translation is accompanied by a half-turn rotation. If these cams are integral with an axis around which is wound the band (1), the rotation causes an elongation of this segment of a length equal to the half-perimeter of the circle. When the roll is outside a turning zone, the displacement is a sliding in translation, under the influence of the force pulling the first axis (from left to right in the figure), this force being transmitted to the next axis by the band (1). During this translation phase a torque is also imposed on the axis but this rotation is prevented by the right profile of the rail. There are then two points of friction, friction that the choice of materials can minimize.

When the roller comes to a pivot zone, the rotation is driven by both camming (21, 22) to follow, the profile following a downward curve for the one and towards the top for the other, and by a torque of rotation due to the fact that the point on which the band pulls is on the periphery of a circle centered on the axis. Pulling on it causes the axis to rotate. Figures 5 to 8 show different solutions for arranging the conveyor belts. In the solution shown in FIG. 5, the conveyor belts (24 to 25) are arranged in parallel. The median axes of two adjacent bands are separated by a distance substantially corresponding to the section of a mature salad. At the beginning of the strip, the salads are widely spaced and as the growth progresses, the free space between the adjacent salads is reduced. However, this solution is not optimized because it does not maximize crop density. In the solution shown in FIG. 6, the crop density is improved by shifting the adjacent bands 27, 28. In the solution shown in FIG. 7, the crop density is optimized by the organization in the form of a first one. series of strips (29) having a feed end (30) disposed opposite the feed end (32) of a second set of strips (31). Figure 8 shows an alternative to this solution, where the adjacent strips (33, 34, 35, 36) are additionally offset longitudinally by a half-step.

Claims (10)

CLAIMS1 - Installation for the above-ground culture, comprising a plurality of juxtaposed systems each ensuring the displacement of plants on a production line (1), characterized in that said systems are configured to ensure the movement of a plant between a d supplying said production line (1) and a withdrawal end of said production line (1) for a period corresponding to the duration of maturation of said plant, and for modifying the distance between two consecutive plants according to at least one of one of the longitudinal or transverse axes on at least part of said production line (1). 2 - plant for cultivation above ground according to claim 1 characterized in that said production line (1) consists of at least one rail and a plurality of transverse pallets movable on said rail, and having receptacles for housing at least one cell aeroponic culture of a plant, the plant further comprising means for changing the distance between two consecutive culturing cells along at least one of the longitudinal or transverse axes on at least part of said line of production (1). 3 - plant for cultivation above ground according to claim 2 characterized in that said transverse pallets have teeth forming secondary rails for the longitudinal displacement of a movable cell longitudinally between two adjacent secondary rails. 4 - plant for the above-ground culture according to claim 1 characterized in that said plant displacement systems comprise a conveyor belt (1) 35 having a plurality of extension elements located on the strip, so reversible, and actuating means of said elements, distributed over the length of the drive system of the strip (1), to ensure a change in the spacing of two consecutive articles during the scroll 5 of said strip. 5 - plant for cultivation above ground according to claim 1 characterized in that said plant displacement systems comprise a conveyor belt (1) 10 having a plurality of extension elements located on the belt, reversibly, and actuating means movable relative to said conveyor belt to ensure a change in the spacing of two consecutive articles during the running of said band. 15 6 - Plant for aboveground cultivation according to claim 4 or 5 characterized in that said plant displacement systems comprise a conveyor belt (1) having a plurality of partial winding elements of the strip, and means of actuating said elements, distributed over the length of the drive system of the band (1), to ensure a modification of the spacing of two consecutive articles during the running of said band. 25 7 - plant for cultivation above ground according to claim 4 or 5 characterized in that said plant movement systems comprise a conveyor belt (1) having a plurality of partial localized folding elements of the strip, and means of actuating said elements, distributed over the length of the drive system of the web (1), to ensure a change in the spacing of two consecutive articles during the running of said web. 8 - plant for cultivation above ground according to any one of the preceding claims characterized in that the feed ends of a first series 3024816 - 21 - of said displacement systems are arranged on the side of the picking ends of a second series of displacement systems, the longitudinal axes of the displacement systems of the first series forming an angle of between -15 and + 15 ° 5 with the longitudinal axes of the displacement systems of the second series. 9 - Plant for aboveground cultivation according to any one of the preceding claims characterized in that the transverse distance between the median longitudinal axes of two adjacent displacement systems is less than the section of a mature plant and in that said Adjacent displacement systems are longitudinally offset by a length corresponding to half of a mature plant. 15 10 - System for moving plants for an installation according to at least one of the preceding claims, characterized in that it comprises a conveyor belt (1) having a plurality of elements and actuating means distributed over the length of the band system (1), to ensure a modification of consecutive articles during the scrolling of said elements, driving the spacing of two of said band. The system according to the preceding claim characterized in that said partial winding element is constituted by a transverse roller fixed on said strip (1) T, said roller (7) having local means rotary drive for winding or unrolling a web segment on either side of the axis of rotation of said roller (7). 12 - System according to claim 10 characterized in that said partial winding element is constituted by a transverse roller locked in rotation except tilting zones distributed over the length of the driving system of the band (1). 13 - System according to the preceding claim 5 characterized in that the rotation of said winding element is provided by the mechanical interaction of said element with at least one tilting zone provided on a translation guide means. 14 - System according to any one of claims 10 to 13 characterized in that the winding element is constituted by a slit roller (7) enclosing a cross section of said conveyor belt (1), and having protuberances of a guide interacting with at least one longitudinal guide rail having a plurality of control areas of the rotation of the winding elements. 15 - System according to the preceding claim characterized in that said protuberances 20 constituted by a circular transverse shoulder, and in that said areas d constituted by enlargements of a longitudinal having a greater section of said shoulder height. The system according to any one of claims 10 to 14 characterized in that the winding element is constituted by a roller enclosing a cross section of said strip ( 1), and having a ratchet wheel, the release of the ratchet being controlled by a member interacting with at least one additional activation means provided on a longitudinal guide rail. 17. System according to any one of claims 10 and 11 characterized in that the winding element is constituted by a roll extended on the other hand and 3024816 - 23 - other by a cylindrical end of parallel axes but opposite. 18 - System according to the preceding claim 5 characterized in that the cylindrical end pieces serve as an axis of rotation to the pedals which are further enslaved in absolute orientation by a low local angle of each longitudinal guide rail relative to the horizontal 10 19 - System according to the two preceding claims characterized in that the right and left longitudinal guide rails are alternately one or the other at the bottom or at the top, the maximum variation between the two altitudes coinciding with the distance between the axes of the 15 cylinders carrying the right and left pedals, ensuring by a pedal movement the longitudinal movement, a rotation of the crankshaft roll 20 system according to any one of claims 5 to 7 characterized in that the conveyor belt is configured to allow the insertion of plant culture support. 21 - Installation comprising a plurality of systems according to claim 1 characterized in that at least one system has a longitudinal axis divergent with the longitudinal axis of an adjacent system, two systems at least the installation comprising moving strips in opposite directions. 22 - System or installation according to any one of the preceding claims characterized in that it further comprises a spraying means directed towards the lower part of the production line (1). System or installation according to the preceding claim characterized in that said spraying means is supported by a carriage movable longitudinally, and in that said carriage comprises means for actuating at least one feed cell. culture. 24 - Aeroponic salad culture plant characterized in that it comprises a plurality of media carrier displacement systems on a conveyor belt, said strip having a plurality of partial winding elements of the strip, and means actuating said elements, distributed over the length of the drive system of the web (1), to ensure a change in the spacing of two consecutive articles during the running of said web (1).