Patent Application
20170094896
The present invention relates to a method for planting out seeds for plants or plants themselves, also referred to as plant material, in particular seedlings, cuttings or tissue-culture plants, which method makes use of assemblies of containers and pre-shaped substrate plugs, of which the plugs are equipped with plant insertion recess into which the plant material can be planted.
A variety of such planting methods are known in the field. For example EP 2 327 293 shows a method in which the pre-shaped substrate plug comprises two distinctive semi-frustoconical shaped segments. The symmetrical segments are formed by mixing a fibre mixture, such as coconut fibre or peat with a heated thermoplastic material as adhesive, which is then moulded in a suitable mould. The two segments can be placed inside a basket for keeping them together. With this the segments lie with flat vertical walls against each other. Subsequently the basket can be placed inside a container of a tray. Before the two segments are placed in the basket and holder respectively, firstly roots of a plant are placed between the two segments.
A disadvantage of this method is that its user-friendliness leaves to be desired and that it is relative time-consuming. Also roots or leafs of the plants may get damaged or broken off during the planting out. For example this can be caused because the segments form fixed units, which fixed units may squeeze the roots when their flat vertical walls get clamped against them. Furthermore the plant may get damaged because a user is likely to be short-handed when trying to first carefully place the plant's roots between the two segments, then secondly keep those segments gently positioned relative to each other, and then thirdly have them correctly placed in the basket. As one can imagine this is a difficult operation to perform by merely one person.
Another example is known from GB 1,054,671. Here a square pre-shaped substrate plug is used which is made out of a spongy compressible material and which has a groove-shaped plant insertion recess which extends over the whole height of the plug. The groove-shaped plant insertion recess has one end located in a central portion of the plug and the other end opening out at one sidewall of the plug. After separating the edges of the groove-shaped plant insertion recess, a plant can be placed with its roots at a desired height therein. Subsequently the edges can be pinched together such that the plant is retained in the plug. After that the plug can be placed into a suitable container.
A disadvantage here also is that its user-friendliness leaves to be desired, and that the method is relative time-consuming and difficult to perform. Again the plants may get damaged during the planting out because a user is likely to be short-handed when trying to first separate the edges, then carefully place the plant's roots into the groove-shaped plant insertion recess, and then pinch the edges together and place the plug in the basket.
The present invention aims to overcome the abovementioned disadvantages at least partly or to provide a usable alternative. In particular the invention aims to provide a cost-efficient planting method which helps to positively influence the growing conditions for the plant and which can be largely automated by having it partly or wholly performed by a robot.
This aim is achieved by a method for planting out a seed for a plant or a plant itself according to the present invention. The method comprises the step of providing a pre-shaped substrate plug which is equipped with a substantially vertically extending plant insertion recess that opens out towards an upper surface of the plug. A container is provided for the plug to fit into. A seed or lower part of a plant is positioned inside the plant insertion recess, after which the plug is placed in an aimed insertion position into the container. According to the inventive thought the provided plug comprises one or more so-called press sections sideways of the plant insertion recess. Those press sections are delimited by outer walls which have dimensions that are larger than dimensions of corresponding parts of inner walls of the container. In other words the press sections are overdesigned relative to the corresponding container parts. During the step of placing the plug in the aimed insertion position into the container, a pressing of the plug into the container needs to be performed, since otherwise the overdesigned press sections would not fit into the corresponding container parts. Because of this pressing, the overdesigned press sections automatically get (com)pressed inwardly in a sideways direction and owing to this automatically start to decrease the plant insertion recess around the seed or lower plant part. This decreasing of the recess may be such that the recess substantially fully has closed around the seed or lower plant part and thus has the substrate material substantially lie all around against the seed or lower plant part. The decreasing of the recess however may also be such that the recess has become smaller but that a limited amount of play remains around at least a part of the seed or lower plant part. Furthermore the decreasing of the recess may be such that the seed or lower plant part at least partly has gotten clamped by the plug's substrate material, without the recess having gotten fully closed all around the seed or lower plant part.
This advantageously makes it possible to quickly and easily place the seed or the plant with its lower part into the plug and have it retained in the aimed insertion position therein. Thus an important cost saving can be obtained. The plant insertion recess can remain open as long as the plug has not been fully pressed into the container. No additional measures need to be taken for this. Subsequently the plant insertion recess can automatically start to decrease, substantially in the sideways direction, by pressing the plug into the container. This pressing can still be performed manually if desired with for example merely one hand. One can pick up the seed or plant, place it into the plant insertion recess and then, if desired with the same hand, press the plug fully into the container. It is also possible to have this done by a robot arm or the like. The easy manual or robotized operation helps to keep the vulnerable seed or plant undamaged during the planting out. It is now obtained that the plant insertion recess gets to automatically and substantially come to lie against the seed or lower plant part as soon as the plug is fully pressed into the container. This causes the seed or lower plant part to get gently contacted by the substrate material, which helps for the plant to quickly start to grow inside the substrate material, and take up water and nutrients. In particular for seedlings, cuttings or tissue-culture plants, this may help them to quickly grow into strong and healthy plants.
The plant material can be placed directly into the recess such that it comes to lie directly against and gets retained by the walls thereof. It is however also possible for the plant material to come to lie indirectly against those recess walls by the plant material being be pre-placed in an auxiliary organ that is designed to get positioned between and retained by the recess walls of the plug. The sub-assembly of the plant material together with its auxiliary organ in which it has been pre-placed, then can get placed manually or automated inside the recess and suitably retained by the recess walls as soon as the recess has been forced to decrease. The auxiliary organ for example can be formed by a dissolvable packaging for the seed, or by a sub-plug inside which the plant material is already growing or by a netting that helps to keep roots of the plant together.
It is possible to first perform the step of positioning of the seed or the plant with its lower plant part inside the plant insertion recess, and not before then take up the substrate plug and place it into the container including a pressing of its press sections into this container. In a preferred embodiment it is however also possible to perform those steps in one go, preferably in one continuous downwards movement. The seed or plant can be moved downwards with the entire seed or merely the lower plant part into the plant insertion recess, until the seed or lower plant part has obtained its foreseen depth therein. Immediately thereafter it is possible to start to exert a downwards pressing force onto the upper surface of the plug such that it gets pressed into the container while at the same time its plant insertion recess starts to decrease.
In a further preferred embodiment, the plug can be pre-placed partly with a lower plug part into an upper part of the container, before the seed or plant with its lower plant part gets positioned inside the plant insertion recess. This can easily be done since the overdesigned press sections automatically may prevent the plug from starting to sink down towards the aimed insertion position inside the container. Instead the plug shall automatically remain to hang in an intermediate position inside the container in which the plug is still interspaced from a bottom of the container.
The press sections can be given all kinds of shapes and dimensions. Preferably they are formed as ribs which project locally outwardly bulging out of the outer plug wall and which extend substantially in a substantially vertical/axial direction alongside the outer wall of the plug. More preferably such locally outwardly bulging ribs are provided at opposing positions relative to the plant insertion recess. It is however also possible for merely one press section to be provided which extends around substantially the entire circumference of the plug at a larger dimension than the corresponding container part where it needs to be pressed into. Instead of the plug being provided with one or more outwardly projecting thickened press sections, or in addition thereto, it is also possible to equip the container with inwardly projecting press wall segments which cause the press sections to be compressed when the plug is pressed into the container.
The plug and the container can be given all kinds of shapes and dimensions. Preferably they are designed such that the plug is able to remain hanging, with its press sections still in a substantially uncompressed state, in the abovementioned intermediate position inside the container. For example the plug with the exception of its overdesigned press sections and the entire container can be made frusto-conical with circumferential outer plug wall and inner container wall which taper under same angles relative to the vertical/axial direction.
In a variant the provided container may delimit a shape such that the plug fits with its press sections in a non-compressed state therein in a first rotational position and that the plug fits with its press sections only in a compressed state therein in a second rotational position which corresponds to the aimed insertion position. This advantageously makes it possible to firstly pre-shape the substrate plug inside the container, for example by moulding it therein. Subsequently the thus pre-shaped plug can be moved at least partly out of the container and rotated from the first rotational position to the second rotational position. Then the further method steps according to the invention can be followed, that is to say, position the seed or lower part of the plant inside the plant insertion recess, and press the plug, which still is in its second rotational insertion position, into its aimed insertion position inside the container while the press sections automatically get compressed inwardly in the sideways direction and force the plant insertion recess to decrease around the seed or lower plant part. Thus the plug can be manufactured inside the same container where it subsequently gets pressed into. Only a partial rotation around its central axis is needed.
In a variant the provided pre-shaped substrate plug may comprise at least one reinforcement element with opposite segments which lie at opposing sides of the plant insertion recess. During the step of pressing of the plug into the container, the reinforcement element then gets deformed from a first “open” towards a second “closed” position together with the inwards compressing of the press sections. In this second position the opposite segments of the reinforcement element, like the press sections of the plug, come to lie closer towards each other in a sideways direction compared to in the first position. Thus the reinforcement element advantageously may help to maintain the integrity of the plug and in particular of the press sections lying opposite the plant insertion recess. Owing to the reinforcement the plug gets less vulnerable and is less likely to break in pieces during handling and processing. In particular the opposite segments of the reinforcement element make the plug less likely to break into pieces at the somewhat fragile location of the upwardly open plant insertion recess during the forced pressing of the plug with its oversized press sections into the container.
In a further variant the reinforcement element may get plastically deformed or locked such that the element is able to substantially maintain its second position after having been deformed thereto. When the oversized plug is removed again from the container, this may help to prevent that the plug returns to its original shape, that is to say back to its first position in which the press sections decompress outwardly in the sideways direction and in which the plant insertion recess at least partly increases again around the seed or lower plant part. By helping to keep the plug substantially in its compressed state, that is to say with the reinforcement element substantially in its second position even after the plug has been partly or wholly removed from out of the container again, further handling and processing of the plug and the seed or plant placed therein remains easier.
Further advantageous embodiments of the method are described herein.
The invention also relates to an assembly of a pre-shaped substrate plug and a container for use in the above inventive method.
In a preferred embodiment of this assembly, a difference between the outer wall dimensions of the press sections of the plug and the inner wall dimensions of the corresponding parts of the container can be made equal to or larger than thicknesses of the plant insertion recess to be decreased. Thus it can be tuned that the plant insertion recess gets to decrease over an aimed amount, in particular at least 3 mm, and for example starts to substantially close itself around the seed or lower plant part and/or starts to clamp around it. The larger the plant insertion recess is made, the more overdesigned the press sections can be made. The dimensions of the still open plant insertion recess are such that it is well able to take up the seed or lower plant part. The dimensions of the overdesigned press sections can be made complementary thereto. This may differ per type of plant which needs to be planted out. In this way an optimal cooperation between the numbers, dimensions and shapes of the press sections and the shape and dimension of the plant insertion recess can be made.
In a further embodiment the plant insertion recess may even be given a varying thickness over its height and/or width inside the plug. For example its thickness can decrease gradually and/or stepped towards the sides and/or towards the bottom of the plant insertion recess, since less seed or lower plant part volume may have to come to lie therein during the planting out. Again the dimensions of the overdesigned press sections can easily be made complementary thereto.
The press sections preferably may be delimited by downwards, that is to say substantially in the axial direction of the plug, tapering outer walls. This provides a sideways inwardly directed wedge action onto the press sections when they are pressed downwards into the container, which makes it lighter to suitably press the plug into the container after the seed or lower plant part has been placed therein.
The plug may comprise an upper and lower plug part, wherein the press sections extend merely along the upper plug part, and wherein the lower plug part has outer wall dimensions which are equal to or smaller than inner wall dimensions of a corresponding lower part of the container. The lower plug part then can easily be pre-placed, preferably with a circumferential play, into an upper part of the container, whereas the upper plug part with its overdesigned press sections automatically gets to hang above this upper container part. It is possible to have the entire upper plug part form the press section. A transition between the outer walls of the upper and lower plug parts then can be made discontinuous. For example the plug then can be given a stepped outer wall. It is then also possible to make this transition more gradual, and for example have the outer walls of the lower plug part taper at a smaller angle α relative to the axial/vertical direction than an angle β at which the outer walls of the upper plug part taper relative to the axial/vertical direction. It is however also possible to have the upper and lower plug parts, including or excluding the press sections, taper at same angles, and equip the container with such a slender upper part that the plug still gets compressed at the location of its upper part when pressed into the container.
As follows from the above, the plant insertion recess into which the seed or lower plant part needs to be inserted, may have all kinds of shapes and dimensions. For example it can be a cylindrical or (frusto)conical recess, or a cross-shaped or star-shaped recess. It may however also be groove-shaped and extend over the entire width of the upper plug part and thus divide this upper plug part into two segments. In this last variant, the two segments of the upper plug part which lie on opposite sides of the plant insertion recess, then can remain hingedly connected with each other by means of the lower plug part. This makes it possible for the upper plug part segments to hinge towards a decreased position when the plug is pressed into the container.
It is also possible for the plug to be provided with more than one plant insertion recess. This makes it possible to plant two or more seeds or plants at a same time in respective recesses of one and the same plug. Such plural recesses then may lie interspaced of each other, for example in a substantially parallel direction.
The pre-shaped substrate plug advantageously is not made as a rigid object but gets to be made compressible and be plastically or elastically deformable. This makes it possible to have its overdesigned press sections deform such during its pressing into the container that the substrate material of the plug that delimits the plant insertion recess gets forced to substantially plastically or elastically decrease around the seed or lower plant part. When made out of plastically deformable material, the substrate advantageously is able to remain its compressed state after it has been pressed into the container. For example the plug can be made out of compressible flexible substrate material which has been glued together by means of a suitable adhesive.
In line with the respective one of the variants of the method described above, the provided plug in an advantageous embodiment may comprise one or more reinforcement elements with opposite segments which lie at opposing sides of the plant insertion recess. Thus, as indicated above, not only the oversized plug itself gets compressed with the inwards compressing of the press sections and the at least partly closing of the plant insertion recess when forced into the container, but also its reinforcement element gets deformed from the first “open” towards the second “closed” position. Together the substrate material and the reinforcement element help to maintain the integrity of the plug during its handling and processing.
In a further embodiment of this variant, the reinforcement element may have a V- or U-shape. Upwardly projecting legs of this V- or U-shape then may form the opposite segments which lie at opposing sides of the plant insertion recess. The curved or sharp pointed lower connection between the legs then may advantageously form a sort of hinge along which the legs may rotate inwardly from their first towards their second position.
Preferably, the opposite segments may extend over substantially the entire height of the plant insertion recess. Thus they are maximally able to reinforce the most vulnerable parts of the plug which lie adjacent the recess.
The reinforcement element may at least partly be connected to or embedded inside the substrate material of the plug. Thus the substrate material and the reinforcement element are well able to move along with each other and transmit forces to each other during such movements.
For this the reinforcement element can be pre-shaped along with the substrate plug, for example by placing it at a suitable position inside a production mould before having the substrate material placed therein and formed into the pre-shaped plug. Together with the substrate material a suitable adhesive then can be added such that after hardening an integrally connected plug assembly of substrate material and reinforcement element is obtained.
In the alternative the reinforcement element can also be introduced afterwards into the pre-shaped substrate plug after manufacturing. If for example the reinforcement element is formed by a V- or U shaped bar or wire, then it is also possible to pierce it with its upwardly projecting legs from below into the plug's substrate material, such that its legs get at least partly positioned along the aimed opposing sides of the plant insertion recess. The curved or sharp pointed lower connection between the legs then may come to lie at or against the lower bottom side of the plug.
It is also possible to have the reinforcement element lie wholly or partly against the outer circumference of the pre-shaped plug, in particular with its opposite segments lying against the outer sides of the press sections. Thus also the opposite segments can be forced to move from their first towards their second position during the pressing of the oversized plug into the container. For example the reinforcement element can then also get connected to the plug's substrate material, by means of a suitable adhesive or the like. The reinforcement element however can also be made such that it is comes to lie freely against the outer side of the plug with its opposite segments lying against the press sections. As long as the reinforcement element is form-stabile, and for example plastically deformable, it then is also well able to help maintain the plug's integrity and prevent it from returning back towards its decompressed state after being removed from the container again.
The reinforcement element can be made out of all kinds of materials, for example plastic or metal. It can be made out of elastically deformable material. The plug, including its press sections and reinforcement element, is then able to return to its original decompressed position as soon as it is removed again out of the container.
In a preferred embodiment, however, the reinforcement element is at least partly made out of a plastically deformable material, in particular metal, such that it is able to maintain the opposite segments in their second position in which they lie closer to each other after the plug including its reinforcement element has been pressed to fit into the container. Thus the plug is able to substantially maintain a compressed state owing to the reinforcement element maintaining its second position, even when the plug gets moved at least partly out of the container again.
In another embodiment the reinforcement element may comprise a locking mechanism between its opposite segments, such that it is able to maintain the opposite segments in the second position in which they lie closer to each other after the plug has been pressed to fit into the container. This locking mechanism for example may be integrated into a hinge which connects the opposite segments with each other and which is designed such that it can only rotate in one direction that is to say in the direction wherein the opposite segments move from the first towards the second position.
In a variant the plug can comprise a temporary blocking organ that extends at least partly inside the recess such that the recess is unable to close prematurely, that is to say before the plant material has actually been placed inside it. Such a temporary blocking organ for example can be formed by a bridging element that extends in a transverse direction over the recess and that is designed to get broken, removed, dissolved or pushed away during planting of the plant material inside the recess such that the recess immediately after removal or destruction of the temporary blocking organ can be forced to move from its “open” towards its “closed” position.
Further advantageous embodiments of the assembly are described herein.
The invention also relates to a pre-shaped substrate plug for use in the method and assembly.
The invention shall now be explained in more detail with reference to the accompanying drawings, in which:
A pre-shaped substrate plug has been given the reference numeral 1 in
The plug 1 comprises three pairs of press sections 5a-c which are provided at diametrically opposite positions relative to the recess 3. Each of the press sections 5 is formed as an elongate tapering rounded rib which projects outwardly bulging from the wall 2. The press sections 5 extend downwards along the outer wall 2 while gradually tapering towards the same diameter as the outer wall 2. Outer wall dimensions d1, d2 of the press sections 5 are larger than the diameter Dp of the frusto-conical outer wall 2. How much larger depends on the height along the plug 1. The maximum differences between D and d1, d2 are designed to be larger than the thickness t of the groove sections 3b.
The assembly of plugs 1 and containers 9 can now advantageously be used as follows:
Firstly the plugs 1 are pre-placed partly with their lower plug parts into upper parts of the containers 9. This is referred to as an intermediate plant positioning position. With this the press sections 5 get to lie against upper edges of the containers 9, while the recess 3 is still fully open.
Subsequently a robot arm 10 each time picks up a plant 8 and carefully and gently moves this plant 8 with a lower part into the open recess 3 of one of the plugs 1. Then in one continuous go the robot arm 10 starts to exert a downwards pressing force onto the upper surface 4 of this plug 1. This causes the plug 1 to get entirely pressed into its container 9. Since the press sections 5 are overdesigned relative to the corresponding upper part of the container 9, they are forced to progressively compress radially inwardly. Because of this the recess 3 automatically starts to progressively close or otherwise decrease around the lower part of the plant 8 and starts to firmly grip this lower plant part 8.
As soon as the entire plug 1 has been pressed into its container 9 it has reached its aimed insertion position therein, in which a lower surface of the plug 1 lies against a bottom of the container 9. The robot arm 10 then can be moved away and pick up another plant 8 for placing it into another one of the plugs 1.
With this variant it is possible to manufacture and use the plugs for planting out in one and the same container. It also may help to prevent pre-shaped plugs from getting damaged during transport towards a planting location.
The plurality of reinforcement elements 100 together may form a sort of open barred basket which lies against the outer sides of the plug 1. This can be achieved by connecting the distinctive elements 100 with each other for example at centres of their connection parts 100a″, 100b″ and 100c″.
The elements 100 may get slightly clamped around the plug 1 such that they get to lie partly embedded therein and/or get adhered thereto so that they are able to form an effective interconnected unit with the plug's substrate material. The elements 100 advantageously reinforce the plug 1 such that no large parts of substrate material may easily break off during handling and processing, like for example the upper plug sections which together delimit the recess 3.
In the position as shown entirely on the left side of
When subsequently the plug 1 gets pressed into the container 9, then the position as shown on the right side of the middle in
The reinforcement elements 100 are made out of such metal wire that they are plastically deformable. This causes them to get plastically deformed when forced to move into the container 9 together with the rest of the plug 1. This has the advantage that if the plug 1 after some time gets removed from the container 9 again, that the reinforcement elements 100 then help to keep the press sections 5 in their compressed state, which causes the plant insertion recess 3 to keep on clamping the plant 8 therein.
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Besides the embodiments shown, numerous variants are possible. For example the shapes and dimensions of the various parts, segments and sections of the container and/or plug can be further changed. The plug material can be very diverse and for example comprise coconut fibres, peat, bark, mineral/rock wool, soil, polyphenol foam, or mixtures thereof. This material can for example be pre-shaped or moulded while being glued together by means of a suitable adhesive. The plug can be made symmetrical or asymmetrical. Instead of the container and/or the plug being made out of one integral part it is also possible to use multi-part plugs and/or containers. For example some kind filling organ(s) like a ring can be placed inside an upper part of the container and/or around an upper part of the plug at the location of the press sections. This filling organ together with the press sections of the plug and the corresponding parts of the container, then also can be made such that an automatic decreasing of the recess is able to take place during pressing of the plug into the container. The plug can also be made out of two or more distinctive segments of which at least some are provided with the press sections and which together can be pressed into a container in such a way that a recess which is delimited by those plurality of segments automatically decreases. Also it is possible to use some kind of intermediate basket inside which the plug or plug segments can get placed before getting pressed together into the container. The container can have substantially closed side and/or bottom walls. It is also possible to use a basket as container of which the walls are provided with a plurality of openings. It is noted that aspects of the above variants of the reinforcement element(s) can also be combined with each other. For example hinges can also be used for the U-shaped variants. Further it is noted that the reinforcement element(s) may also be equipped with suitable profiles and/or cross or transverse pieces or the like such that they can get more grip onto the plug's substrate material and vice versa. Also it is noted that the other embodiments can also be provided with one or more reinforcement elements.
Thus the invention provides an easy to manufacture assembly of container and plug with relative large dimensioned press section(s) sideways of a plant insertion recess, which assembly makes it possible to truly speed up, improve and possibly fully automate a planting out process.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2012923 | May 2014 | NL | national |
| 2013289 | Aug 2014 | NL | national |
This application is the National Stage of International Application No. PCT/NL2015/050386 filed May 29, 2015, which claims the benefit of Netherlands Application Nos. NL 2012923, filed May 30, 2014, and NL 2013289, filed Aug. 1, 2014, the contents of all of which are incorporated by reference herein.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/NL2015/050386 | 5/29/2015 | WO | 00 |
