Abstract:
The invention relates to agricultural device ( 2 ) comprising a first element ( 1 ) and a plurality of second elements ( 6, 6′, 6″, 6″′, 6″″, 6″″′ ); wherein said first element has an elongated extension; wherein one or more of said second elements ( 6, 6′, 6″, 6″′, 6″″, 6′″″ ) are adapted to be movable in relation to said first element in a direction along said elongated extension of said first element; wherein each said second element comprises an agricultural activity providing system ( 9 ); wherein said agricultural device ( 2 ) comprises means for remotely and/or automatically adjusting the position of one or more of the second elements individually relative to the first element; wherein said agricultural activity providing system ( 9 ) is selected from the group comprising: seeding devices ( 10 ), weeding devices ( 10 ), fertilizing devices ( 10 ), cultivation devices ( 10 ) and tillage devices ( 10 ).

Description:
FIELD OF INVENTION 
       [0001]    The present invention generally relates to an agriculture device having a plurality of seeding devices, weeding devices, fertilizing devices, cultivation devices or tillage devices. The present invention more particularly relates to an agricultural device having a plurality of seeding devices, weeding devices, fertilizing devices, cultivation devices or tillage devices and means for changing the distance between the seeding devices, weeding devices, fertilizing devices, cultivation devices or tillage devices. 
       PRIOR ART 
       [0002]    Agricultural devices comprising seeding devices, weeding devices, fertilizing devices, cultivation devices or tillage devices normally comprise an elongated bar and a plurality of seeding devices, weeding devices, fertilizing devices, cultivation devices or tillage devices secured to the bar. 
         [0003]    DE 29718303 U1 discloses an agricultural device comprising a plurality of weeding devices movable attached to a bar. The distance between the wedding devices can be changed by manually moving the weeding devices. 
         [0004]    It is, however, very time consuming and inconvenient to adjust the distance between the weeding devices by such manual procedure. Moreover, it is only possible to achieve a limited number of distances between adjacent weeding devices due to the restrictions of the adjustment procedure. 
         [0005]    DE 9001064 U1 discloses an apparatus for weeding of soil by cultivation. The apparatus comprises a frame which at both its sides comprises a cultivation tool. The position of the cultivation tool is adjustable in relation to the centre of the frame by means of hydraulics. The apparatus of DE 9001064 U1 does not disclose that the apparatus comprises means for individually adjusting the position of two cultivation tools. Furthermore, DE 9001064 U1 does not mention that the cultivation tools are being slidable attached to a bar or a roller chain. 
         [0006]    This apparatus accordingly does not provide full flexibility in adjusting the cultivation tools to the row of crops that is about to be weeded. 
         [0007]    Accordingly, there is need for an agricultural device which reduces or even eliminates the above mentioned disadvantages of the prior art. 
         [0008]    It is an object of the present invention to provide an agricultural device that eliminates the need for moving the seeding devices, weeding devices, fertilizing devices, cultivation devices or tillage devices manually. 
         [0009]    It is also an object of the present invention to provide an agricultural device in which the distance between adjacent weeding devices, adjacent seeding devices, adjacent fertilizing devices, adjacent cultivation devices or adjacent tillage devices can be changed steplessly. 
       BRIEF DESCRIPTION OF THE PRESENT INVENTION 
       [0010]    The present invention relates in a first aspect to an agricultural device comprising a first element and a plurality of second elements; 
         [0011]    wherein said first element having an elongated extension; 
         [0012]    wherein one or more of said second elements are adapted to be movable in relation to said first element in a direction along said elongated extension of said first element; 
         [0013]    wherein each said second element comprising an agricultural activity providing system; 
         [0014]    wherein said agricultural device comprises means for remotely and/or automatically adjusting the position of one or more of the second elements individually relative to the first element; 
         [0015]    wherein said agricultural activity providing system being selected from the group comprising: seeding devices, weeding devices, fertilizing devices, cultivation devices and tillage devices; 
         [0016]    characterized in that said first element comprising a bar and wherein said second elements being slidably attached to said bar; or in that said first element comprising a roller chain tightly suspended in said device and wherein said second elements being slidably attached to said roller chain. 
         [0017]    The present invention relates in second aspect to the use of the agricultural device of the first aspect for an agricultural purpose. 
         [0018]    The object of the present invention can be achieved by an agricultural device as defined in claim  1  and  17  respectively. Preferred embodiments are defined in the dependent sub claims and explained in the following description and illustrated in the accompanying drawings. 
         [0019]    Accordingly, the present invention in its first and second aspect eliminates the drawbacks of the prior art set forth above. 
     
    
     
       DESCRIPTION OF THE DRAWINGS 
         [0020]    In the accompanying drawings: 
           [0021]      FIG. 1  shows a schematic close-up side view of an agricultural device according to the invention; 
           [0022]      FIG. 2  shows another side view of the agricultural device shown in  FIG. 1 ; 
           [0023]      FIG. 3  shows two perspective views of an agricultural device according to the invention; 
           [0024]      FIG. 4   a  &amp;  FIG. 4   b  show two perspective close-up views of an agricultural device according to the invention; 
           [0025]      FIG. 5   a  &amp;  FIG. 5   b  show two side views of an agricultural device according to the invention and 
           [0026]      FIG. 6  shows a close-up side view of another agricultural device according to the invention. 
           [0027]      FIG. 7  shows a close-up side view of an alternative agricultural device according to the invention. 
           [0028]      FIG. 8  shows a close-up side view of yet another alternative agricultural device according to the invention. 
       
    
    
     SUMMARY OF THE PRESENT INVENTION 
       [0029]    The object of the present invention can be achieved by an agricultural device  2  comprising a first element  1  and a plurality of second elements  6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ′″″; 
         [0030]    wherein said first element having an elongated extension; 
         [0031]    wherein one or more of said second elements  6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ′″″ are adapted to be movable in relation to said first element in a direction along said elongated extension of said first element; 
         [0032]    wherein each said second element comprising an agricultural activity providing system  9 ; 
         [0033]    wherein said agricultural device  2  comprises means for remotely and/or automatically adjusting the position of one or more of the second elements individually relative to the first element; 
         [0034]    wherein said agricultural activity providing system  9  being selected from the group comprising: seeding devices  10 , weeding devices  10 , fertilizing devices  10 , cultivation devices  10  and tillage devices  10 ; 
         [0035]    characterized in that said first element ( 1 ) comprising a bar ( 4 ) and wherein said second elements ( 6 , 6 ′, 6 ″, 6 ′″, 6 ″″, 6 ′″″) being slidably attached to said bar ( 4 ); or in that said first element comprising a roller chain ( 66 ) tightly suspended in said device ( 2 ) and wherein said second elements ( 6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ″″′) being slidably attached to said roller chain ( 66 ). 
         [0036]    Hereby it is achieved that the seeding devices, weeding devices, fertilizing devices, cultivation devices or tillage devices can be moved remotely and/or automatically so that no manually adjustment is required at the site of the device. The agricultural device according to the invention is time saving and furthermore provides a more accurate adjustment of the distance between the seeding devices and/or weeding devices and/or fertilizing devices and/or cultivation devices and/or tillage devices. 
         [0037]    It may be beneficial that the agricultural device either comprises a plurality of seeding devices or a plurality of weeding devices or a plurality of fertilizing devices or a plurality of cultivation devices or a plurality of tillage devices. 
         [0038]    However, it is possible to have an agricultural device that comprises different types of devices (e.g. seeding devices and weeding devices). 
         [0039]    The means for automatically adjusting the position of the seeding devices and/or weeding devices and/or fertilizing devices and/or cultivation devices and/or tillage devices relative to the first element may be any suitable means e.g. electrical means, pneumatic means or hydraulic means. 
         [0040]    The agricultural device may comprise more than one first element. It may be an advantage that the agricultural device comprises a plurality of two or more first elements that preferably are foldably attached to each other. 
         [0041]    The agricultural device may by way of example comprise three first elements including a centrally arranged first element that is foldably attached to two lateral first elements (one lateral first element at each end. 
         [0042]    In one embodiment of the present invention, the first element  1  comprising a bar  4  and wherein said second elements  6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ″″′ being slidably attached to said bar  4 . 
         [0043]    In one embodiment of this embodiment, one or more of said second elements  6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ″″′ comprises a frame  8 , said frame comprising a wheel  50  mechanically connected to the bar  4 , wherein said wheel  50  is arranged in such a way that a rotation of the wheel  50  causes the corresponding second element to be displaced along a longitudinal direction X of the bar  4 . 
         [0044]    Hereby the wheel can be used to displace the frame along the longitudinal axis of the bar. Accordingly, the required translation of the frame can be achieved. Moreover, stepless adjustments of the distances between adjacent seeding devices and/or weeding devices and/or fertilizing devices and/or cultivation devices and/or tillage devices can be achieved. 
         [0045]    In one embodiment of the present invention, the first element  1  in the form of said bar  4  is a toothed rack  62  and wherein said one or more of said second elements are configured to be displaced along a longitudinal axis X of said toothed rack  62 . 
         [0046]    In one embodiment of this embodiment, the one or more of said second elements  6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ″″′ comprises a frame  8 , said frame  8  comprising a pinion  12  configured to engage with said toothed rack  62  in such a way that a rotation of the pinion  12  causes the corresponding second element to be displaced along a longitudinal direction X of said toothed rack  62 . 
         [0047]    In another embodiment of the present invention, the first element  1  in the form of said bar  4  is a holed bar  64  comprising a plurality of holes  7  arranged inline in a longitudinal direction X of said bar, and wherein one or more of said second elements are configured to be displaced along said longitudinal axis X of said holed bar  64 . 
         [0048]    In one embodiment of this embodiment, the one or more of said second elements  6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ″″′ comprises a frame  8 , said frame  8  comprising a sprocket wheel  15  configured to engage with said holed bar  64  in such a way that a rotation of the sprocket wheel  15  causes the corresponding second element to be displaced along a longitudinal direction X of the holed bar  64 . 
         [0049]    In another embodiment of the present invention, the first element comprising a roller chain  66  tightly suspended in said device  2  and wherein said second elements  6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ″″′ being slidably attached to said roller chain  66 . 
         [0050]    In one embodiment of this embodiment, the one or more of said second elements  6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ″″′ are configured to be displaced along a longitudinal axis X of said roller chain  66 . 
         [0051]    In still one embodiment of this embodiment, the one or more of said second elements  6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ″″′ comprises a frame  8 , said frame  8  comprising a sprocket  17  configured to engage with said roller chain  66  in such a way that a rotation of the sprocket  17  causes the corresponding second element to be displaced along a longitudinal direction X of the roller chain  66 . 
         [0052]    In the above-mentioned embodiments with the toothed rack or the holed bar or the roller chain it is achieved that the distance between adjacent seeding devices and/or weeding devices and/or fertilizing devices and/or cultivation devices and/or tillage devices can be changed steplessly. This is a huge advantage and it makes it possible to use the agricultural device in various applications. 
         [0053]    It is preferred that the first element comprises a toothed rack or a holed bar or a roller chain and that all the adjacent seeding devices and/or weeding devices and/or fertilizing devices and/or cultivation devices and/or tillage devices are configured to be displaced along the longitudinal axis of the rack/bar/roller chain. When all the adjacent seeding devices and/or weeding devices and/or fertilizing devices and/or cultivation devices and/or tillage devices are configured to be displaced along the longitudinal axis of the bar/rack/roller chain, a very accurate adjustment of the distance between the adjacent seeding devices and/or weeding devices and/or fertilizing devices and/or cultivation devices and/or tillage devices can be achieved. 
         [0054]    The embodiments, where the second elements comprises a frame  8 , wherein said frame  8  comprising a pinion  12 , a sprocket wheel  15 , or a sprocket  17  configured to engage with said bar/rack/roller chain provides a very reliable and robust design which is simple to provide and operate. 
         [0055]    By connecting driving means to the wheels and/or pinions it is possible to carry out a remote and/or an automatic and controlled rotation of the wheels and/or pinions and hereby cause a translation of the seeding devices and/or weeding devices and/or fertilizing devices and/or cultivation devices and/or tillage devices. 
         [0056]    In one embodiment of the present invention at least some of the wheels  50  and/or pinions  12  and/or sprocket wheels  15  and/or sprockets  17  are connected to driving means  40 , preferably an electrical motor  40 , configured to rotate said wheels  50  and/or said pinions  12  and/or said sprocket wheels  15  and/or said sprockets  17 . 
         [0057]    The driving means may be an electrical motor, however, it would also be possible to use hydraulic driving means or pneumatic driving means to drive the wheels or the pinions. 
         [0058]    In one embodiment of the present invention, in respect of one or more of said second elements  6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ″″′ a driving wheel  50  or a driving pinion  12  or a sprocket wheel  15  or a sprocket  17  is provided at a second side  54  of the first element  1  and being mechanically connected to a second side  54  of said first element  1  and that an auxiliary wheel or pinion or sprocket wheel or sprocket  14  is provided at a first side  52  of said first element  1 . 
         [0059]    Hereby it is achieved that the auxiliary wheel may be used to guide and support the translation of the frame. It is moreover possible to transfer the load of the weight of the frame and the seeding devices and/or weeding devices and/or fertilizing devices and/or cultivation devices and/or tillage devices to the auxiliary wheel so that the load on the driving pinion or the driving wheel can be reduced. 
         [0060]    It is preferred that the first element comprises a first generally upwardly directed side, and a second opposite generally downwardly directed side. 
         [0061]    A driving wheel or a driving pinion is preferably provided at the second side of the first element and the auxiliary wheel is preferably provide at a first side of the first element. It is preferred that the first element is sandwiched between the driving wheel or the driving pinion and the auxiliary wheel. 
         [0062]    On the other hand it is possible that the first element comprises a first generally downwardly directed side, and a second opposite generally upwardly directed side. 
         [0063]    In one embodiment of the present invention the agricultural device  2  comprises a control unit configured to activate the driving means  40  and hereby individually adjust the individual distance between second elements  6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ″″′. 
         [0064]    Hereby the control unit may be used to carry out a controlled adjustment of the seeding devices and/or weeding devices and/or fertilizing devices and/or cultivation devices and/or tillage devices, e.g. from the inside of a vehicle so that no manual operation is required. It is also possible to use an automatic mode, in which the adjustments are carried out on the basis of predefined, measured and/or received signals. 
         [0065]    In one embodiment of this embodiment the control unit comprises an interface, said interface being configured to be able to start, stop and change the activity of the driving means  40  and hereby individually adjust the individual distance between the second elements  6 , 6 ′, 6 ″, 6 ″′, 6 ″″, 6 ″″′. 
         [0066]    In another embodiment of the present invention the control unit comprises an interface configured to remotely or automatically activate said agricultural activity providing system  9 . 
         [0067]    By way of example it is possible to use a smart phone as interface to control the agricultural device including activation of the means for driving the wheels or pinions or sprocket or sprocket wheels. 
         [0068]    According to the first aspect of the present invention, it is preferred that the agricultural device  2  is a device for sowing, planting, fertilizing, weeding, cultivation or tilling. 
         [0069]    In a second aspect, the present invention relates to a use of an agricultural device according to the first aspect for an agricultural purpose. 
         [0070]    It is preferred that such an agricultural purpose is selected from the group comprising: sowing, planting, fertilizing, weeding, cultivation and tilling. 
       DETAILED DESCRIPTION OF THE INVENTION 
       [0071]    The invention will become more fully understood from the detailed description given herein below. The accompanying drawings are given by way of illustration only, and thus, they are not limitative of the present invention. 
         [0072]    Referring now in detail to the drawings for the purpose of illustrating preferred embodiments of the present invention, an agricultural device  2  of the present invention is illustrated in  FIG. 1 . 
         [0073]      FIG. 1  illustrates a schematic close-up side view of an agricultural device  2  according to the invention. The agricultural device  2  comprises a first element  1  in the form of an elongated bar  62  shaped as a toothed rack  4  having a first generally upwardly directed plane side  52  and a second opposite generally downwardly directed plane side  54 . 
         [0074]    The agricultural device  2  comprises a second element  6  comprising a frame  8  having two frame members  16 ,  16 ′ that are interconnected by a lower support member  22 , two intermediate support members  20 ,  22  and an upper support member  16 ″. A pinion  12  is rotably attached to the uppermost intermediate support member  20  and the pinion  12  is engaged into the toothed rack  62 . 
         [0075]    An agricultural activity providing system  9  in the form of a device  10  is attached to the lower support member  22  of the frame  8 . The device  10  is for illustrational purposes symbolized by a box, however, the device  10  may be any suitable device such as seeding devices, weeding devices, fertilizing devices, cultivation devices, tillage devices or any other suitable device. 
         [0076]    The toothed rack  62  comprises a plurality of teeth  5  equally spaced by a corresponding number of indentations  3 . The pinion  12  comprises a plurality of teeth  13  equally spaced and separated by indentations  11 . The teeth  13  of the pinion  12  are configured to be received by the indentations  3  in the toothed rack  62  and the teeth  5  of the toothed rack  62  are configured to be received by the indentations  11  in the pinion  12 . 
         [0077]    The pinion  12  is connected to driving means (not shown) configured to rotate the pinion  12  and hereby cause a translation of the second element  6  along the longitudinal axis X of the rack  62  relative to the rack  62 . Hereby it is possible to change the distance between adjacent second elements  6 ,  6 ′ (see  FIG. 2  or  FIG. 5 ). The driving means may be an electric motor. 
         [0078]    An auxiliary wheel  14  is rotably attached to the upper support member  16 ″. The auxiliary wheel  14  bears against the first side  52  of the rack  62  and the auxiliary wheel  14  is configured to be rotated and hereby roll along the first side  52  of the rack  62 . 
         [0079]      FIG. 2  illustrates a side view of the agricultural device  2  shown in  FIG. 1 . The agricultural device  2  comprises a second elements  6  and  6 ′. The second elements  6 ,  6 ′ are similar to the second elements shown in  FIG. 1  and the members  6 ,  6 ′ are mutually spaced. The distance D between the second element  6  and the second element  6 ′ can be altered by rotating either the pinion  12  of the second element  6  or the pinion  12 ′ of the second element  6 ′. 
         [0080]    When the pinions  12 , 12 ′ are being rotated in the clockwise direction the second elements  6 ,  6 ′ are moved to the left. When the pinions  12 ,  12 ′ are being rotated in the counter clockwise direction the second elements  6 ,  6 ′ are moved to the right. Of course, it is possible to move each of the second elements  6 ,  6 ′ independently in order to provide the desired distances between the members  6 ,  6 ′. 
         [0081]      FIG. 3  illustrates two perspective views of an agricultural device  2  according to the invention. The agricultural device  2  comprises a multiple of second elements  6 ,  6 ′,  6 ″,  6 ″′,  6 ″″,  6 ″″′ arranged along a toothed rack  62 . Each of the second elements  6 ,  6 ′,  6 ″,  6 ″′,  6 ″″,  6 ″″′ comprise a pinion  12  that is rotably mounted to the second element  6 ,  6 ′,  6 ″,  6 ″′,  6 ″″,  6 ″″′ and that engages the teeth  3  of the toothed rack  62 . 
         [0082]      FIG. 4   a  illustrates a perspective close-up view of an agricultural device  2  according to the invention. The agricultural device  2  comprises a toothed rack  62  extending through the openings in a frame  8  having a plane front plate member  24 , a plane back plate member  26 , a plane top plate member  28  and a plane bottom plate member  30 . A pinion  12  is rotably mounted to the frame  8 . The pinion  12  engages the toothed rack  62  and thus the frame  8  is configured to be moved along the longitudinal axis X of the rack  62 . 
         [0083]    An electrical motor  40  is mounted to the frame  8 . The motor  40  comprises a base member  42  that is mechanically connected to the back plate member  26 . 
         [0084]    The electrical motor  40  is mechanically connected to the pinion  12  and the electrical motor  40  is adapted to rotate the pinion  12  and hereby cause a translation of the frame  8  along the longitudinal axis X of the rack  62 . 
         [0085]    Two electrical cables  36 ,  38  are connected to the end surface of the electrical motor  40 . The electrical motor  40  is powered through these electrical cables  36 ,  38  that preferably are connected to a control unit (not shown). 
         [0086]    It is preferred that the agricultural device  2  comprises or is configured to be controlled by use of a centrally arranged control unit (not shown) that enables central and optionally individually control of all the second elements  6 ,  6 ′,  6 ″,  6 ″′,  6 ″″,  6 ″″′ of the agricultural device  2 . 
         [0087]    The use of an electrical motor  40  makes it possible to carry out very small adjustments of the position of the frame  8 . It is, however, also possible to use the motor  40  to have a larger range of motion and thus carry out larger translation of the frame  8  along the longitudinal axis of the rack  62 . 
         [0088]    An auxiliary wheel  14  having a shaft  32  extending between the front plate member  24  and the back plate member  26  of the frame  8  is rotably mounted to the frame  8 . The auxiliary wheel  14  bears against the first side  52  of the rack  62 . The rack  62  is sandwiched between the auxiliary wheel  14  and the pinion  12 . 
         [0089]    In  FIG. 4   b  an agricultural activity providing system in the form of a device  10  is attached to the bottom plate member  30 . The device  10  may be a seeding device, a weeding device, a fertilizing device, a cultivation device or a tillage device by way of example. In  FIG. 4   b  the device is illustrated as a box (for simplicity reasons). When the first side  52  of the rack  62  is oriented upwardly the weight of the frame  8  and the device  10  is transferred from the auxiliary wheel  14  to the first side  52  of the rack  62 . Accordingly, the pinion  12  is not subject to load caused by the weight of the device  10  or the frame  8 . 
         [0090]      FIGS. 5   a  and  5   b  illustrate two side views of an agricultural device  2  according to the invention. The agricultural device  2  comprises a frame  8  and a bar  4  formed as a toothed rack  62  that engages the pinion  12  of two second elements  6 ,  6 ′. The rack  62  has a first side  52  and a second side  54 . The teeth  5  of the rack  62  are provided at the second side  54  of the rack  62 . 
         [0091]    An agricultural activity providing system in the form of a device  10  is mechanically attached to the lower side of the frame  8 . The device  10  comprises a support frame  48  and two wheels  44 ,  46  rotably mounted to the lower part of the support frame  48 . 
         [0092]    In  FIG. 5   a  the distance D 2  between one second element  6  and another second element  6 ′ is larger than the distance D 1  between the second element  6  and the second element  6 ′ in  FIG. 5   b . The distance D 1 , D 2  between one second element  6  and the other second element  6 ′ can be changed by rotating the pinion  12  of the second element  6  and/or the pinion  12  of the second element  6 ′. 
         [0093]      FIG. 6  illustrates a close-up side view of an agricultural device  2  according to the invention. The agricultural device  2  comprises a first element in the form of a bar  4  having a longitudinal axis X. The agricultural device  2  moreover comprises a second element  6  having a frame  8  comprising two side frame members  16 ,  16 ′, extending parallel to each other. A connection frame member  16 ″ connects the top portion of the two side frame members  16 ,  16 ′. A lower support member  22  connects the lower portion of the two side frame members  16 ,  16 ′. Further two intermediate support members  18 ,  20  connect the central region of the two side frame members  16 ,  16 ′. 
         [0094]    An auxiliary wheel  14  is rotably mounted to the upper connection frame member  16 ″. The auxiliary wheel  14  bears against the first side  52  of the bar  4 . A second wheel  50  is rotably attached to the central support member  20 . The second wheel  50  bears against the second side  54  of the bar  4 . Thus the second wheel  50  is configured to cause a translation of the second element  6  along the longitudinal axis X of the bar  4  when the second wheel  50  is rotated. 
         [0095]    The second wheel  50  may be rotated by using any suitable means e.g. an electrical motor. 
         [0096]      FIG. 7  illustrates a close-up side view of another agricultural device  2  according to the invention. The agricultural device  2  comprises a first element  1  in the form of a holed bar  64  having a longitudinal axis X and comprising a range of holes  7 . The agricultural device  2  moreover comprises a second element  6  having a frame  8  comprising two side frame members  16 ,  16 ′, extending parallel to each other. A connection frame member  16 ″ connects the top portion of the two side frame members  16 ,  16 ′. A lower support member  22  connects the lower portion of the two side frame members  16 ,  16 ′. Further two intermediate support members  18 ,  20  connect the central region of the two side frame members  16 ,  16 ′. 
         [0097]    An auxiliary wheel  14  is rotably mounted to the upper connection frame member  16 ″. The auxiliary wheel  14  bears against the first side  52  of the holed bar  64 . A sprocket wheel  15  is rotably attached to the central support member  20 . The sprocket wheel  15  bears against the second side  54  of the holed bar  64  in such a way that the teeth  13  of the sprocket wheel engage with the holes in the roller chain  66 . Thus the sprocket wheel  15  is configured to cause a translation of the second element  6  along the longitudinal axis X of the holed bar  64  when the sprocket wheel  15  is rotated. 
         [0098]    The sprocket wheel  15  may be rotated by using any suitable means e.g. an electrical motor. 
         [0099]      FIG. 8  illustrates a close-up side view of yet another agricultural device  2  according to the invention. The agricultural device  2  comprises a first element  1  in the form of a roller chain  66  tightly suspended in the device  2  and having a longitudinal axis X. The agricultural device  2  moreover comprises a second element  6  having a frame  8  comprising two side frame members  16 ,  16 ′, extending parallel to each other. A connection frame member  16 ″ connects the top portion of the two side frame members  16 ,  16 ′. A lower support member  22  connects the lower portion of the two side frame members  16 ,  16 ′. Further two intermediate support members  18 ,  20  connect the central region of the two side frame members  16 ,  16 ′. 
         [0100]    An auxiliary wheel  14  is rotably mounted to the upper connection frame member  16 ″. The auxiliary wheel  14  bears against the first side  52  of the roller chain  66 . A sprocket  17  is rotably attached to the central support member  20 . The sprocket  17  bears against the second side  54  of the holed bar  64  in such a way that the teeth  13  of the sprocket engage with the “holes” or openings in the roller chain  66 . Thus the sprocket  17  is configured to cause a translation of the second element  6  along the longitudinal axis X of the roller chain  66  when the sprocket  17  is rotated. 
         [0101]    The sprocket  17  may be rotated by using any suitable means e.g. an electrical motor. 
       LIST OF REFERENCE NUMERALS 
       [0000]    
       
           1 —First element 
           2 —Agricultural device 
           3 —Indentation 
           4 —Bar 
           5 —Tooth 
           6 ,  6 ′,  6 ″—Second element 
           6 ″′,  6 ″″,  6 ″″′—Second element 
           7 —Holes 
           8 —Frame 
           9 —Agricultural activity providing system 
           10 —Device 
         X—Longitudinal axis 
         D, D 1 , D 2 —Distance 
           11 —Indentation 
           12 ,  12 ′—Pinion 
           13 —Tooth 
           14 —Auxiliary wheel or pinion or sprocket or sprocket wheel 
           15 —Sprocket wheel 
           16 ,  16 ′,  16 ″—Frame member 
           17 —Sprocket 
           18 ,  20 ,  22 —Support member 
           24 ,  26 ,  28 ,  30 —Plate member 
           32 ,  34 —Shaft 
           36 ,  38 —Cable 
           40 —Motor 
           42 —Base member 
           44 ,  46 —Wheel 
           48 —Support frame 
           50 —Wheel 
           52 —First side 
           54 —Second side 
           62 —Toothed rack 
           64 —Holed bar 
           66 —Roller chain