High-density planting equipment

Abstract

To provide a high-density planting / cultivation apparatus that performs high-density planting / cultivation in a best condition for weather by opening / closing of a covering sheet even if field crops are apples or pears of an arborescent fruit tree that does not use cultivation shelves.SOLUTION: A high-density planting / cultivation apparatus comprises: support pillars 1; a covering sheet 2 which is provided so as to cover at least a part of the support pillars; and sheet moving mechanisms 3 which are provided such that the covering sheet is moved in an opening / closing direction with respect to the support pillars, where the support pillars are severally arranged in parallel for both sides in width direction sandwiching a work passage 5, and the covering sheet is arranged in a freely opening / closing movable manner in a longer direction of the work passage by the sheet moving mechanisms.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a high-density planting cultivation device used for outdoor cultivation of plants such as fruit trees and fruit vegetables. [Background technology]

[0002] Conventionally, a heat-shielding cultivation method suitable for the outdoor cultivation of fruit trees such as grapes and apples, and fruit vegetables such as tomatoes, cucumbers, and eggplants has been proposed, in which one end of a heat-shielding net is fixed to the surface of the upper shelf of a cultivation shelf, and the upper shelf surface is covered with a switch (winder) attached to the other end of the heat-shielding net, thereby suppressing the amount of leaf transpiration and the temperature of the fruit, thereby improving the yield of the fruit and the quality of its coloring (see, for example, Patent Document 1). In the embodiment of Patent Document 1, branches of fruit trees (Kyoho grapes) are placed and fixed on vertical beam pipes, horizontal beam pipes, and wire stretched between the vertical beam pipes, and one end of the heat-shielding net is fixed to the horizontal beam pipes of the upper shelf and the vertical beam pipes of the upper shelf with a fixing pin. The second embodiment (Figure 3) has a guide pipe (short cross beam pipe) that guides the heat shield net, a winder (long winding pipe) that winds up the heat shield net that covers the upper shelf of the cultivation shelf, and a hand rotor that transmits power to the winder. In the third embodiment (Figure 4), an arch roof has guide pipes (short arch pipes) that guide the heat-shielding net, a winder (long winding pipe) that winds up the heat-shielding net that covers the upper shelves of the cultivation shelves, and a hand rotor that transmits power to the winder. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2005-027629 Summary of the Invention [Problem to be solved by the invention]

[0004] Meanwhile, high-density planting is attracting attention as a new method of apple cultivation. High-density planting is characterized by the fact that by increasing the planting density, less labor is required and a larger harvest can be expected. To explain in more detail, by planting trees with shorter distances between them and training the side branches to droop to reduce the tree width, the space utilization efficiency of the field is improved, and the smaller tree bodies allow better access to sunlight and pesticides, ensuring healthy growth. Furthermore, since the main trunks can be easily reached, workability is improved and mechanization is easier, which is expected to improve management work efficiency. For this reason, in high-density planting, it is preferable to plant a large number of plants in a linear row at close intervals, which results in each field becoming long and narrow. However, Patent Document 1 has a problem in that the cultivation shelves are designed specifically for climbing fruit trees such as grapes and kiwifruit, and are therefore unsuitable for tall fruit trees such as apples and pears, which do not require cultivation shelves. Furthermore, the heat-shielding net that covers the upper shelf surface of the cultivation shelves is opened and closed using a reel (a long reeling pipe) that is arranged along the length of the heat-shielding system. Therefore, in fields where high-density plantings are made long and narrow, there is a problem that the reel becomes large and the opening and closing operation becomes unstable. Under these circumstances, there is a demand for a high-density planting cultivation system (high-density planting cultivation device) that can also accommodate tall fruit trees. [Means for solving the problem]

[0005] In order to solve these problems, the high-density planting cultivation device of the present invention comprises a support, a covering sheet arranged to cover at least a portion of the support, and a sheet moving mechanism arranged to move the covering sheet in an opening / closing direction relative to the support, wherein the support is arranged in parallel on both sides of the width direction of the work passage, and the covering sheet is arranged so that it can be freely opened and closed in the longitudinal direction of the work passage by the sheet moving mechanism. [Brief explanation of the drawings]

[0006] [Figure 1]1(a) and 1(b) are explanatory diagrams showing the overall configuration of a high-density planting cultivation device according to an embodiment (first embodiment) of the present invention, in which (a) is a longitudinal front view and (b) is an enlarged front view of the portion indicated by the dashed dotted line in FIG. 1(a). [Figure 2] These are oblique views, where (a) is a reduced overall oblique view excluding the plant body, (b) is a partially enlarged oblique view of the rail, and (c) is a partially enlarged oblique view of the slider. [Figure 3] 3(a) and 3(b) are explanatory diagrams showing the overall configuration of a high-density planting cultivation device according to an embodiment (second embodiment) of the present invention, in which (a) is a reduced longitudinal sectional front view, and (b) is an enlarged front view of the portion indicated by the dashed dotted line in FIG. 3(a). [Figure 4] 4(a) and 4(b) are explanatory diagrams showing the overall configuration of a high-density planting cultivation device according to an embodiment (third embodiment) of the present invention, in which (a) is a longitudinal front view, and (b) is an enlarged front view of the portion indicated by the dashed dotted line in FIG. 4(a). [Figure 5] 5(a) is a reduced perspective view of the entire plant body excluding the plant body, and FIG. 5(b) is an enlarged perspective view of the part indicated by the dashed dotted line in FIG. 5(a). DETAILED DESCRIPTION OF THE INVENTION

[0007] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. As shown in Figures 1 to 5, the high-density planting cultivation device A of an embodiment of the present invention is a high-density planting cultivation system suitable for high-density planting in outdoor cultivation of agricultural crops F, including fruit trees such as apples, pears, grapes, and kiwifruit, and fruit vegetables such as tomatoes, cucumbers, and eggplants, thereby increasing the space utilization efficiency of a field (farm land) B. More specifically, the high-density planting cultivation device A according to an embodiment of the present invention comprises, as its main components, support poles 1 provided near the crops F, a covering sheet 2 provided to cover at least a portion of the support poles 1, and a sheet moving mechanism provided to move the covering sheet 2 in an opening / closing direction. The sheet moving mechanism is preferably composed of rails 3, sliders 4, etc. The crops F are edible plants such as fruit trees such as apples, pears, grapes, and kiwifruit, and fruit vegetables such as tomatoes, cucumbers, and eggplants, and more particularly, tall fruit trees Ft such as apples and pears are preferred. In Field B, crop F is planted in rows with short spacing between fruit trees and fruit vegetables, and the side branches are trained to droop, resulting in a thin-walled arrangement (row) of trees with an outer shape similar to a cylinder. This increases the space utilization efficiency of Field B. Furthermore, in field B, as shown in FIG. 1(a) and other figures, a work aisle 5 is provided along a plurality of crops F planted in rows. The crops F are arranged in parallel on both sides of the work aisle 5 in the width direction that intersects with the longitudinal direction of the work aisle 5. For this reason, the work aisle 5 is formed in a substantially linear, elongated shape, and the crops F are not cultivated in the area of ​​field B that will become the work aisle 5. Furthermore, as shown in FIG. 3(a), a plurality of sets of crops F planted in rows and work aisles 5 can be arranged at predetermined intervals in the width direction of the work aisles 5.

[0008] The support 1 is formed in a rod shape and is erected by burying the end portion 1a of the support 1 in the field B, as shown in Figure 1(a), or by fixing the end portion 1a of the support 1 in another way so that it cannot move. Furthermore, the supports 1 are arranged in parallel in the longitudinal direction of the work aisle 5 on both sides of the width of the work aisle 5, just like the multiple crops F. To explain in more detail, these supports 1 are arranged in parallel at intervals that are approximately the same as or longer than the intervals (between trees) between the multiple crops F planted in rows. At least some or all of the plurality of supports 1 are erected so that tip 1b of each support 1 is positioned higher than the height of crops F. Furthermore, when multiple crops F planted in rows and work paths 5 are arranged in multiple sets at predetermined intervals across the width of the work paths 5, multiple sets of supports 1 are arranged in parallel across the width, sandwiched between the multiple work paths 5, as shown in Figure 3(a).

[0009] Specific examples of the support 1 shown in Figures 1 to 5 include a first support 11 erected along multiple crops F planted in a row, a second support 12 that mainly supports the rails 3 of the sheet moving mechanism described below, and horizontal rods 13, 14 that are installed across the second support 12 in the width direction across the work aisle 5. It is preferable to use hollow tubes that are lightweight and have excellent strength as the first support column 11, the second support column 12, and the cross bars 13, 14, and thin tubes are used for all but the second support column 12. The first support 11 and the second support 12 are positioned so that all of their tip portions 1b are higher than the height of the crops F, and it is preferable that the crops F be fixed or temporarily secured to at least the first support 11 using an elastically deformable binding device (not shown) such as a rubber stopper band. The second pillars 12 are arranged at predetermined intervals along the length of the work passage 5 regardless of the spacing between the first pillars 11, and are reinforced by bridging cross bars 13, 14 across the second pillars 12 that face each other in the width direction of the work passage 5. In addition, although not shown as other examples of the support 1, it is possible to use solid rod material instead of a tube for the first support 11, the second support 12 and the cross rods 13, 14, or to change them to a shape or size other than that shown in the illustrations, or to connect them in a structure different from that shown in the illustrations. In addition to the first support 11, the crops F can also be fixed or temporarily secured to a support wire (not shown) made of a string, rope, cord, etc. that is strung across the first support 11 and the second support 12 in the longitudinal direction of the work passage 5 using an elastically deformable binding device (not shown) made of a rubber stopper band, etc.

[0010] As shown in FIG. 1(a) and other figures, the covering sheet 2 is made of a material with excellent light-blocking, heat-insulating, and heat-retaining properties, and is formed to a size that covers the entire longitudinal length of the work passage 5. Specifically, it is preferable to use a porous sheet with adequate breathability as the material for the covering sheet 2, and it is particularly preferable to use a net with many fine ventilation holes that are smaller than the ice particles that fall from clouds. Ice particles that fall from clouds include hailstones with a diameter of 5 mm or more and graupel with a diameter of less than 5 mm, and the fine ventilation holes are set to a size that does not allow ice particles such as hailstones and graupel to pass through. Furthermore, the covering sheet 2 is preferably a roof sheet 21 provided across a plurality of sheet moving mechanisms (described later) arranged on both sides in the width direction across the work aisle 5. The roof sheet 21 is laid horizontally so as to cover the top surfaces of a plurality of crops F planted in rows on both sides in the width direction across the work aisle 5. The roof sheet 21 preferably has a sloped portion 21a that is inclined in the width direction of the work aisle 5. The sloped portion 21a is formed so as to slope in a flat or curved shape from one side to the other on either side in the width direction across the work aisle 5. Furthermore, it is preferable that the covering sheet 2 has side sheets 22 in addition to the roof sheet 21. The side sheets 22 are provided so as to cover at least a portion of the side surfaces of the multiple supports 1. Furthermore, like the roof sheet 21, the side sheets 22 are arranged so as to be freely opened and closed in the longitudinal direction of the work passage 5 by a sheet moving mechanism described later, and are stretched out so as to cover the sides of each of the multiple crops F planted in rows on both sides of the work passage 5 in the width direction.

[0011] As shown in Figure 1(b) and Figures 2(a), (b), and (c), the sheet moving mechanism is an opening and closing mechanism that spreads and converges the covering sheet 2 by sliding (reciprocating) the covering sheet 2 in the longitudinal direction of the work passage 5 over the crops F planted in rows. More specifically, the sheet moving mechanism is composed of a rail 3 installed across the supports 1 arranged in the longitudinal direction of the work passage 5, and a slider 4 installed to be movable along the rail 3. The rails 3 are installed at or near the tips 1b of the posts 1 that are higher than the multiple crops F planted in rows, and approximately parallel to the work aisle 5. Furthermore, it is preferable to install multiple rails 3 horizontally on both sides in the width direction of the work aisle 5 where the multiple crops F are arranged in parallel. The sliders 4 are supported on the rails 3 so as not to fall off and so as to be reciprocatable along the rails 3 in the longitudinal direction of the working passage 5, and a plurality of sliders 4 are provided on the covering sheet 2 at predetermined intervals. The sliding movement of the slider 4 relative to the rail 3 and the opening and closing operation of the covering sheet 2 are performed by an operating mechanism 6. Examples of the operating mechanism 6 include a type that moves the slider 4 and the covering sheet 2 manually and a type that moves them electrically.

[0012] In the case shown in Figures 1 to 5 as a specific example of a seat moving mechanism, a rail 3 is installed horizontally via a clamp 32 relative to a vertical rod 31 suspended from horizontal rods 13 and 14, and the rail 3 has a pair of parallel rail grooves 3a. The slider 4 has a slider body 4a, a plurality of rollers 4b provided on the slider body 4a, and a sheet stopper 4c provided on the slider body 4a. The multiple rollers 4b are engaged with the rail groove 3a of the rail 3 so that they cannot fall off, and by rotating and sliding the multiple rollers 4b along the rail groove 3a, the slider body 4a and the stopper 4c are supported so that they can move back and forth in the longitudinal direction of the working passage 5. The sheet fasteners 4c are hooks that detachably connect the corners and both sides of the cover sheet 2 to the slider body 4a. In addition, although other examples of the rail 3 and slider 4 are not shown, it is also possible to change the shape of the rail 3, the number of rail grooves 3a, the shape of the slider body 4a, the number of rollers 4b, and the structure of the sheet fastener 4c to shapes, numbers, and structures other than those shown in the drawings.

[0013] Next, specific examples (first to third embodiments) of the high-density planting cultivation apparatus A according to the embodiments of the present invention will be described. In the first embodiment of the high-density planting cultivation device A1 shown in Figures 1(a)(b) to 2(a)(b)(c), a plurality of tall fruit trees Ft such as apples and pears are planted in rows on both sides of a work aisle 5 in the width direction as agricultural crops F, and rails 3 and sliders 4 are arranged as sheet moving mechanisms, and a roof sheet 21 of a covering sheet 2 is laid across a plurality of sliders 4 facing each other in the width direction of the work aisle 5. The roof sheet 21 is made of a net having excellent light-shielding properties and having many fine ventilation holes that prevent ice particles such as hail and sleet from passing through. A manual operating part 6a consisting of a rope, string, cord, or the like is connected to the slider 4 (slider body 4a) connected to one longitudinal end of the roof sheet 21. The roof sheet 21 can be opened and closed by a worker working in the work passage 5 holding the manual operating part 6a and moving in the longitudinal direction of the work passage 5.

[0014] In the illustrated example, a substantially horizontal crossbar 13 is installed across multiple support pillars 11 (second support pillars 12) erected opposite each other in the width direction of the work passage 5. Therefore, the rails 3 and sliders 4, which are installed opposite each other in the width direction, and both widthwise sides of the roof sheet 21 are arranged at substantially the same height position. As a result, when the roof sheet 21 is laid horizontally, the cross section of the roof sheet 21 connected to the sliders 4 that gradually drops down from both sides in the width direction towards the center is formed into a roughly U-shape, forming curved slopes 21a across the entire roof sheet 21. Therefore, even if ice particles from hail or hail fall, they roll down in the width direction along the slopes 21a, protecting the crops F. Furthermore, if necessary, although not shown, by drilling holes in the hanging portion of the roof sheet 21 that are larger in diameter than the fine ventilation holes in the roof sheet 21, it is possible to allow ice particles such as hail and hailstones to fall from the roof sheet 21 toward the work passage 5 where there are no crops F. As another example (not shown), when the roof sheet 21 is laid horizontally, it is also possible to change the cross-sectional shape of the roof sheet 21 to be approximately V-shaped by forming flat sloped portions 21a from both sides of the width of the roof sheet 21 toward the central part that hangs down the most.

[0015] The second embodiment of the high-density planting cultivation device A2 shown in Figures 3(a) and (b) differs from the first embodiment in that multiple sets of crops F planted in rows and work aisles 5 are arranged at predetermined intervals in the width direction of the work aisles 5, and multiple covering sheets 2 are arranged on these multiple work aisles 5 so that they can be opened and closed freely.Other than that, the configuration is the same as that of the first embodiment. The multiple pillars 1 are arranged in parallel in the width direction, sandwiching the multiple work passages 5 between them, and the multiple covering sheets 2 are arranged so that they can be slid open and closed freely in the longitudinal direction of the multiple work passages 5 across the sheet moving mechanisms (rails 3, sliders 4) provided on the multiple pillars 1. In the illustrated example, horizontal bars 14 inclined at a predetermined angle are installed across a plurality of support posts 11 (second support posts 12) erected opposite each other in the width direction of a plurality of work passages 5. Therefore, the rails 3 and sliders 4, which are installed opposite each other in the width direction, and the roof sheet 21 on both sides in the width direction are arranged at different height positions. As a result, when multiple roof sheets 21 are laid horizontally, the cross-sectional shape of the roof sheets 21 connected to the slider 4, which gradually hang down from both sides of the width direction toward the center, is formed into a sloping, approximately U-shape, and curved sloped portions 21a are formed throughout the multiple roof sheets 21. As another example (not shown), when multiple roof sheets 21 are laid horizontally, some or all of them can be changed to a non-inclined, approximately U-shape like the high-density planting cultivation device A1 of the first embodiment, or to an inclined, approximately V-shape or a non-inclined, approximately V-shape.

[0016] The third embodiment of the high-density planting cultivation device A3 shown in Figures 4(a)(b) to 5(a)(b) differs from the first and second embodiments in that side sheets 22 are arranged along multiple supports 1 to cover the sides of multiple agricultural crops F, and the side sheets 22 are arranged so as to be freely opened and closed in the longitudinal direction of the work aisle 5. However, the other configurations are the same as those of the first and second embodiments. The side sheets 22 are made of a net that has excellent light blocking properties and moderate breathability. The side sheets 22 are supported via a sheet moving mechanism (rails 3, sliders 4) so ​​as to be slidable in the longitudinal direction of the work passage 5 relative to a plurality of third support posts 15 arranged in parallel at predetermined intervals in the longitudinal direction of the work passage 5. The plurality of third support posts 15 are erected in a non-agricultural area C adjacent to the work passage 5 in the width direction, with a plurality of agricultural crops F and a plurality of support posts 1 planted in rows in the longitudinal direction of the work passage 5 at their center. In the illustrated example, a side sheet 22 is added to only one of the non-cultivation areas C adjacent to the work aisle 5 in the width direction with respect to the high-density planting cultivation device A1 of the first embodiment. As other examples (not shown), it is also possible to modify the high-density planting cultivation device A1 of the first embodiment so that side sheets 22 are added to both non-agricultural areas C adjacent to the work aisle 5 in the width direction, or to modify the high-density planting cultivation device A2 of the second embodiment so that side sheets 22 are added to only one non-agricultural area C or to both non-agricultural areas C.

[0017] In the high-density planting cultivation device A according to the embodiment of the present invention, the crops F are arranged in parallel with the posts 1 on both sides of the work aisle 5 in the width direction, and the covering sheet 2 is closed and extended in the longitudinal direction of the work aisle 5 by the sheet moving mechanism (rail 3, slider 4) over the multiple posts 1 and multiple crops F, thereby smoothly covering the entire multiple crops F. Therefore, when the sheet is closed, the multiple crops F can be protected from sunlight in the summer and from cold air and ice particles falling in the winter. Conversely, by opening and converging the covering sheet 2 in the longitudinal direction of the work aisle 5 using the sheet moving mechanism (rail 3, slider 4), the entire plurality of crops F is smoothly exposed. Therefore, when the sheet is in the open state, the plurality of crops F can receive sufficient sunlight. Therefore, even if the crop F is a tall fruit tree Ft such as an apple or pear that does not require a cultivation trellis, high-density cultivation can be carried out under the best conditions according to the weather by opening and closing the covering sheet 2. As a result, compared to conventional systems that have cultivation shelves and open and close the heat shield net with a long winder, the opening and closing operation of the covering sheet 2 is stable, and it can be opened and closed easily in a short time even if the field B is long and narrow. This makes it possible to prevent sunburn of fruits in the summer, damage to fruits due to cold damage caused by frost in the winter, damage to fruits due to hail or sleet, and damage to fruits by harmful birds.

[0018] In particular, it is preferable that the support posts 1 are installed near the crops F planted in rows, and the covering sheet 2 is a roof sheet 21 installed across multiple sheet moving mechanisms (rails 3, sliders 4) arranged on both sides of the work aisle 5 in the width direction. In this case, the roof sheet 21 is closed and stretched in the longitudinal direction of the work aisle 5 along multiple sheet moving mechanisms (rails 3, sliders 4) arranged on both sides of the work aisle 5 in the width direction, so that the top surfaces of the multiple supports 1 arranged on both sides of the work aisle 5 in the width direction and the multiple crops F planted in rows are covered, and the work aisle 5 is also covered with the roof sheet 21. Therefore, shade can be created in the work passage 5. As a result, an abnormal rise in body temperature of workers performing agricultural work on the work passage 5 can be prevented, which serves as a measure against heat stroke and the like, and also improves work efficiency.

[0019] Furthermore, it is preferable that the roof sheet 21 has a slope portion 21a that is inclined in the width direction. In this case, even if ice particles fall in winter, they roll down in the width direction along the sloped portion 21a of the roof sheet 21, and can be guided toward the work passage 5 where agricultural products F are not cultivated, or the non-agricultural area C adjacent to the work passage 5 in the width direction. Therefore, the crops F can be reliably protected from ice particles such as hail and graupel. As a result, damage to fruit caused by ice particles such as hail and graupel can be reduced.

[0020] In addition, in the example shown in Figures 3(a) and (b), multiple sets of support pillars 1 are arranged in parallel across the width of the work passage 5, and multiple roof sheets 21 are arranged to cover the multiple work passages 5, each of which can be freely opened and closed. According to the second embodiment of the high-density planting cultivation device A2, by closing and spreading out the multiple roof sheets 21 in the longitudinal direction of the work aisle 5, the top surfaces of the multiple crops F planted in rows along the longitudinal direction of the work aisle 5 are covered. Therefore, by opening and closing the multiple roof sheets 21, it is possible to carry out high-density planting of a large number of agricultural products F with a higher planting density under the best conditions according to the weather. As a result, less work is required and more harvest is expected.

[0021] In addition, in the example shown in Figures 4(a)(b) to 5(a)(b), the covering sheet 2 has a side sheet 22 that is arranged to cover at least a portion of the side surface of the support 1, and the side sheet 22 is arranged so that it can be freely opened and closed in the longitudinal direction of the work passage 5. According to the third embodiment of the high-density planting cultivation device A3, by closing and extending the side sheet 22 in the longitudinal direction of the work aisle 5, multiple crops F planted in a row along the longitudinal direction of the work aisle 5 are covered from the sides of each crop F. Therefore, the crops F can be reliably protected from strong western sunlight and crosswinds. As a result, it is possible to reduce sunburn of the fruit caused by the strong western sun in summer and wind damage to the fruit caused by strong crosswinds.

[0022] In the above-described embodiments (first to third embodiments), the agricultural product F is a tall fruit tree Ft such as an apple or a pear, but the present invention is not limited to this and may be used for outdoor cultivation of vine fruit trees such as grapes or kiwifruit, or fruit vegetables such as tomatoes, cucumbers, and eggplants at high density. In this case, the same effects and advantages as those of the first to third embodiments can be obtained. Furthermore, although the sheet moving mechanism is shown to be composed of a rail 3 and a slider 4, it is not limited to this and may have a structure different from the rail 3 and slider 4 shown in the illustration as long as it can move the cover sheet 2 in the opening and closing direction. Furthermore, although the case where the operating mechanism 6 that opens and closes the cover sheet 2 is a manual operating unit 6a has been shown, this is not limited to this, and the operating mechanism 6 may be configured to be electrically operated by an electric operating unit (not shown). [Explanation of symbols]

[0023] A. High density planting equipment F. Crops 1. Support 2. Covering sheet 21 Roof sheet 21a Slope portion 22 Side seat 3 Seat movement mechanism (rail) 4 Seat moving mechanism (slider) 5 Work aisle

Claims

1. The pillars and a covering sheet provided to cover at least a portion of the support; a sheet moving mechanism provided to move the covering sheet relative to the support in an opening / closing direction, The support columns are arranged in parallel on both sides of the work passage in the width direction, The covering sheet is laid horizontally so as to cover the top surface of the tall fruit tree, No tall fruit trees are grown in the work passageway, A high-density planting cultivation device characterized in that a manual operating unit is connected to the sheet moving mechanism connected to one longitudinal end of the covering sheet, and the covering sheet is arranged so as to be freely opened and closed in the longitudinal direction of the working passage when an operator holds the manual operating unit and moves in the longitudinal direction of the working passage.

2. The support is provided near the rows of planted crops, 2. The high-density planting cultivation device according to claim 1, wherein the covering sheet is a roof sheet provided across a plurality of the sheet moving mechanisms arranged on both sides in the width direction across the work passage.

3. 3. The high-density planting cultivation device according to claim 2, wherein the roof sheet has a sloped portion inclined in the width direction.

4. A high-density planting cultivation device as described in claim 2 or 3, characterized in that the supports are arranged in parallel in multiple sets in the width direction on either side of the work passage, and multiple roof sheets are arranged so as to be able to be freely opened and closed so as to cover multiple work passages.

5. A high-density planting cultivation device as described in claim 1, 2, 3 or 4, characterized in that the covering sheet has a side sheet that is arranged to cover at least a portion of the side of the support, and the side sheet is arranged so that it can be freely opened and closed in the longitudinal direction of the work passage.

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