Irrigation apparatus

Abstract

To provide an irrigation apparatus that allows for more efficient land use and increased yields.SOLUTION: An irrigation apparatus has: one traveling rail; a traveling vehicle that moves back and forth on the traveling rail by using at least two wheels of front and rear wheels; a support arm that extends from a main support pillar erected on the traveling vehicle in a right-to-left direction of the traveling vehicle; a nozzle pipe that is supported by the support arm and to which a sprinkler nozzle is attached; a liquid hose that is connected at one end to the nozzle pipe; liquid delivery means that is connected to the other end of the hose; a cable that is stretched along a movement area of the traveling vehicle; a plurality of hose holding members that suspend the liquid hose on the cable so that it can be moved freely; and a sub-support pillar with auxiliary wheels that support the right and left sides of the support arm.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an irrigation device. [Background technology]

[0002] The present invention relates to a water supply device for use in plant cultivation, which is suitable for irrigation and is installed outdoors or in a cultivation house or the like.

[0003] Conventionally, watering has been done using sprinklers attached to hoses, but this inevitably results in uneven watering, which prevents the plants from growing in a balanced manner. Known devices that do not cause such uneven watering include those described in Patent Documents 1 and 2, in which a pair of running rails is laid, a motor-driven self-propelled watering carriage with a watering means attached to the rails is installed so that it can travel back and forth, and one end of a hydraulic pressure hose is connected to the watering means, and nozzle pipes are installed extending horizontally on both the left and right sides of the running vehicle to irrigate seedling trays and the like lined up on the left and right sides of the rails. However, these devices required complex mechanisms to reel in and out the heavy water-filled hoses connecting the pump and the watering means, and the electric wires that supply power to the vehicle, and were therefore costly and impractical. Therefore, as in Patent Document 3, a cable is stretched along the area of ​​movement of the traveling vehicle, and multiple hose holding members are provided that are movably engaged with the cable, and the hose is suspended from the cable, thereby improving usability by allowing the hose to be extended with an extremely light force as the self-propelled vehicle moves, without requiring complex control. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Publication number 6-5726 [Patent Document 2] Publication number 6-39571 [Patent Document 3] Registered Utility Model No. 3013319 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in these patent documents, as shown in FIG. 15, for example, when a traveling vehicle S moves back and forth on a pair (two) of laid rails R, a width equal to the gap between the two rails R is required, so the area of ​​land required for the traveling vehicle to move back and forth increases, which in turn reduces the area of ​​land required for plant cultivation. In addition, extending the nozzle pipes to the left and right to increase the watering area can make the vehicle more likely to lose balance, and when cultivating tall plants or when seedling trays are placed in a high position, the center of gravity of the vehicle becomes higher, making it more likely to tip over. Furthermore, when multiple rails are laid side by side, water and debris can easily accumulate between the rails, which can cause problems with operation.

[0006] Therefore, the present invention overcomes the drawbacks of the conventional technology as described above, and provides an irrigation device with a simple configuration that can be installed and operated inexpensively, and that effectively increases the area available for plant cultivation and increases the yield. [Means for solving the problem]

[0007] The invention for solving the above problem is an irrigation device comprising one running rail, a running vehicle that reciprocates on the running rail using at least two wheels, front and rear wheels, a support arm extending from a main support pillar erected on the running vehicle in the left and right directions of the running vehicle, a nozzle pipe with a sprinkler nozzle attached that is supported by the support arm, a liquid hose connected at one end to the nozzle pipe, a liquid delivery means connected to the other end of the hose, a cable stretched along the movement area of ​​the running vehicle, a plurality of hose holding members that suspend the liquid hose on the cable so that it can be moved freely, and a sub-support pillar with training wheels that support the left and right sides of the support arm.

[0008] The vehicle is also characterized in that the running rail is sandwiched between the wheels and / or other wheels, thereby fixedly supporting the running vehicle on the rail.

[0009] The device is also characterized by having a cultivation shelf with two or more upper and lower shelves on which trays can be placed, and the height of the watering nozzle from the ground is 125 cm or more. [Effects of the Invention]

[0010] The present invention allows for more efficient land utilization and increased yields. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic explanatory diagram of a first embodiment of the present invention (the entire irrigation device viewed from the side in a direction perpendicular to the traveling direction of a traveling vehicle). [Figure 2] 1 is a schematic explanatory diagram of the irrigation device (particularly the traveling vehicle) of the first embodiment as viewed from above. [Figure 3] 1 is a schematic explanatory diagram of a traveling vehicle according to a first embodiment, viewed from the direction of travel. [Figure 4] 1 shows how an electric wire 80 and a hose 30 are suspended from a tensioned cable 40 according to the present invention. [Figure 5] The state of the pump P and tank T in the present invention. [Figure 6] 10 shows the irrigation device according to the second embodiment. [Figure 7] 1A and 1B are schematic explanatory views of a second embodiment of the present invention ((a) viewed from above, (b) viewed from the side in which the traveling direction of a traveling vehicle is perpendicular); [Figure 8] (c) A view of the traveling vehicle of the second embodiment seen from above, and (d) A view of the traveling vehicle seen from the direction of travel. [Figure 9] 10 shows the main support 12a, wheels 7, motor m, and rail support portion of the traveling vehicle of the second embodiment. [Figure 10] 10(e) is a schematic explanatory diagram of a configuration for clamping a rail of a traveling vehicle according to a second embodiment, and FIG. 10(f) is a schematic explanatory diagram of another aspect. [Figure 11] 10 shows the training wheels 5 attached to the left and right sub-supports (12b or 12c) in the second embodiment. [Figure 12] FIG. 10 is a schematic explanatory diagram of a cultivation shelf according to a third embodiment. [Figure 13] 10 shows the state of the cultivation shelf in the third embodiment (at the early stage of seedling raising). [Figure 14] 10 shows the state of the cultivation shelf in the third embodiment (at the middle stage of seedling raising). [Figure 15] A top view of a conventional irrigation system. DETAILED DESCRIPTION OF THE INVENTION

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes an embodiment of the present invention. However, the present invention is not limited to the following embodiments, and any combination thereof may be used. In addition, although the same reference numerals are generally used for the same components in the drawings relating to each embodiment, in order to avoid complication of explanation due to an increase in the number of reference numerals, they may be used independently in each drawing. Therefore, even if common reference numerals are used in other drawings, they may not necessarily have the same configuration as in other drawings.

[0013] [First embodiment] An irrigation device according to an embodiment of the present invention will be described with reference to FIGS. Fig. 1 shows a first embodiment of the present invention as seen from the side, with the traveling direction of the traveling vehicle perpendicular, Fig. 2 as seen from a plan view (top), and Fig. 3 as seen from the traveling direction. In this embodiment, a single traveling rail R is laid and fixed on the ground outdoors or in a cultivation room (not shown) such as a greenhouse. The rail R is made of steel and may be placed directly on flat ground as shown in the figure, but it may also be fixed on a concrete foundation or to wooden sleepers using spikes or screws. Since there is only one (just one) running rail in this way, the area required for the running vehicle to reciprocate is reduced compared to the conventional case (see Fig. 15), and accordingly, the area required for plant cultivation increases (see Fig. 2).

[0014] Also, in this embodiment, the rail R has a shape used for ordinary trains etc. (a cross-sectional shape similar to the character "工"). In this case, the front wheels 2a and rear wheels 2b of the watering vehicle S as the running vehicle are restrained from lateral deviation during running by the side portions (flanges) 2c provided on the sides (see Fig. 3), and roll smoothly on the said rail. Note that the rail and the wheels may have other shapes as long as the form (combination) is such that lateral deviation is restrained while the running vehicle is running. For example, a rail with a cross-section in the shape of a mountain (not shown) may be used. In that case, it is desirable that the wheels (not shown) have a form in which V-grooves are provided on the peripheral surface, whereby lateral deviation is similarly restrained and the said rail is rolled smoothly. An electric motor m (not shown) is mounted on the watering vehicle S, and the axles 3a and / or 3b are rotationally driven via gears, belts or chains etc. The motor is driven by a battery mounted on the watering vehicle or a power cable pulled together with the water supply hose (not shown).

[0015] Near the lower end of the front surface and near the lower end of the rear surface of the watering vehicle S, rail end detectors 8 and 9 are respectively provided, and for these detection methods, conventionally well-known techniques can be used. For example, it may have a structure including an elastic piece and an actuator of a detection switch within the displacement range of the elastic piece, and when the detection parts 10 and 11 composed of flexible pieces erected near both ends of the rail collide with the elastic piece, the detection switch is pushed to detect the rail end.

[0016] Main struts 12a are erected vertically in front of and behind the watering vehicle S. Also, a support arm 15 that supports a nozzle pipe 16 made of a pipe extends in the left-right direction with respect to the traveling direction of the watering vehicle S, and the vicinity of its center is fixedly supported by the main strut 12a.

[0017] The left and right ends of the support arm 15 are fixedly supported by sub-supports 12b and 12c, each having an auxiliary wheel 5 attached thereto. By being fixed and supported in this way by a secondary support with training wheels, the balance does not become poor even if the water spray position becomes higher and the center of gravity of the traveling vehicle becomes higher, and it will not tilt due to strong winds, earthquakes, large vibrations, etc., allowing for stable operation. Furthermore, since the running vehicle is stabilized, the nozzle pipe 16 can be extended further in the left and right directions, which contributes to an increase in the spray area. In this embodiment, one auxiliary wheel is provided on each of the left and right sub-supports, but two or more auxiliary wheels may be provided.

[0018] The nozzle pipe 16 is fixedly supported by the support arm 15 with its left and right closed ends extending near both ends of the support arm 15. A plurality of branch pipes branch off from the nozzle pipe 16, and one end of the branch pipe near the center protrudes outside the support arm 15 near the center of the support arm 15 to form a hose guide 19. One end of a hose 30, which will be described later, is moored to the hose guide 19. The other branch pipes of the nozzle pipe 16 protrude from the underside of the support arm 15 at appropriate intervals, and sprinkler nozzles 17, 17, ... are attached to the protruding ends.

[0019] In this embodiment, the nozzle pipe 16 is supported by the highly rigid support arm 15, but the nozzle pipe itself may be made of a highly rigid plastic pipe, metal pipe, or the like using conventionally known technology to be self-supporting. In this case, the nozzle pipe 16 and the support arm 15 can be said to be the same member (the nozzle pipe and support arm), and therefore the two may be integrally formed or made of the same member, and either can fall under the scope of the present invention.

[0020] 1 and 4, a pair of poles 41, 42 are erected to sandwich the traveling rail R in the longitudinal direction, a wire cable 40 is stretched between the poles, and a plurality of hose holding pulleys 50 are slidably attached to the cable 40 as hose holding members. The hose 30 is suspended from the wire cable 40 via the hose holding pulleys 50. The hose 30, hose holding pulley 50, cable, pole, pump (liquid delivery means), tank, and other components may be of conventionally known construction.

[0021] For example, one end of the liquid pressure feed hose 30 is anchored to the hose guide 19 of the spray vehicle S, held by a plurality of hose holding pulleys at appropriate intervals, bent in a wavy shape, and anchored to a cable 40. As shown in Figures 1 and 5, the other end of the hose 30 is connected to the discharge pipe of the pump P via a pole 42. The suction pipe of the pump P is connected to the bottom of the liquid tank T via the suction hose.

[0022] In addition, the irrigation device may be controlled by conventional well-known methods using a timer, an electromagnetic on-off valve, a pressure switch, a motor drive circuit, a controller, etc. For example, when the pressure in the hose 30 rises above a certain pressure, the pressure switch sends a signal to the controller 4, and the controller 4 activates the timer and the electromagnetic on-off valve and closes the motor drive circuit. The motor drive circuit is controlled by the controller 4 so that, as long as the timer circuit is activated, the rail end detectors 8, 9 detect the rail end and each time a detection signal is input to the controller 4, the motor drive circuit reverses the rotation direction of the motor, and when the timer circuit is deactivated and the detection signal is input, the motor drive circuit opens, stopping the motor and deactivating the electromagnetic on-off valve.

[0023] In the irrigation system configured as described above, cultivation shelves 22 are installed in cultivation areas 20 on both the left and right sides of rail R, and seedling trays, cell trays, plug trays, pods, etc. (hereinafter referred to as "trays 70" or "trays") to be irrigated are arranged side by side thereon, and tank T is filled with water or a fertilizer solution, etc. When the start switch of pump P is pressed in this state, water, etc. is sent to the hose, and the pressure inside the nozzle pipe increases. This then activates, for example, a pressure switch, opens an electromagnetic on-off valve, and water or water containing fertilizer begins to irrigate trays 70 from the watering nozzles 17, and motor m starts, causing sprayer vehicle S to begin moving toward the other end of the rail. At the same time, the timer circuit of controller 4 is activated.

[0024] When the spraying vehicle S reaches the end of the rail R and the rail end detector 8 abuts against the detection unit 10, the motor m rotates in reverse and the spraying vehicle S begins to move in the opposite direction. Then, when the rail end detector 9 detects the detection unit 11, it reverses again. In this way, the spraying vehicle S continues to move back and forth, irrigating. The timer circuit is adjusted based on the speed of the spraying vehicle and the length of the traveling rail so that when the spraying vehicle S is on its return journey, the timer circuit is de-energized when the set time expires. Therefore, when the spraying time previously set in the timer has elapsed, the spraying vehicle stops when the detector 9 detects the detection unit 11 at the starting point. At the same time, the electromagnetic shut-off valve is de-energized and irrigation stops.

[0025] As shown in Figures 1 and 4, when the sprayer vehicle S is traveling on its outward journey, the hose 30 is pulled toward the pole 41 by the main support 12a and the support arm 15, and moves along the cable 40 while being stretched from its folded state, and when the sprayer vehicle S is traveling on its return journey, the hose 30 is in its folded state and follows the movement of the sprayer vehicle by the main support 12a and the support arm 15.

[0026] The sprayer is battery-powered or supplied with an external power source via an electric wire. When using an external power source, a rubber-coated, waterproof and flexible electric wire 80 is bundled together with the hose 30 near the hose guide 19 and suspended along the cable 40. The hose is then separated from the electric wire near the pole 42 and connected to a power source. This not only allows the sprayer to be handled in exactly the same way as when it is powered by an on-board battery, but also eliminates the need to worry about battery consumption and charging (see Figure 4).

[0027] Although a normal power grid can be used as an external power source, if there is no power grid or if you want to reduce power costs, the present invention can operate with low power consumption, so it can be operated sufficiently with power from a small-scale solar power generation system, for example. There is no need to operate it, especially on rainy days when there is little sunlight. Furthermore, since the present invention is simple to operate and allows a traveling vehicle to move with little effort, it can also be operated by human operation without using electric power.

[0028] In addition, although a pump is used as the means for delivering liquid to the hose in this embodiment, other means for delivering liquid may be used. For example, even if water is drawn from a river flowing at a higher elevation than the irrigation device and delivered directly to the hose, this can still be considered as the liquid delivery means of the present invention.

[0029] In the irrigation device of this embodiment, the vehicle runs on a single rail, which narrows the width of the vehicle and reduces the area required for running, resulting in a larger plant cultivation area (see Figure 2), and allowing for a higher harvest yield compared to conventional devices (see Figure 15). In addition, by providing auxiliary supports (12b, 12c) supported by the training wheels 5, the balance is improved and the vehicle will not tilt due to large vibrations such as strong winds or earthquakes, allowing for stable operation.

[0030] Second Embodiment An irrigation device according to a second embodiment will be described. FIG. 6 shows the irrigation device of this embodiment installed outdoors. In addition, Figure 7a shows the irrigation device as seen from above, Figure 7b shows it as seen from the side perpendicular to the direction of travel of the moving vehicle, Figure 8c shows the moving vehicle as seen from above, and Figure 8d shows it as seen from the direction of travel of the moving vehicle.

[0031] In the second embodiment, only one rail R is laid on a concrete foundation (see Figs. 6 to 9). As shown in Figs. 9 and 10e, the second embodiment is provided with wheels (front wheels 2a and rear wheels 2b, the same as in the first embodiment) positioned above the rail R that support the weight of the traveling vehicle, as well as two auxiliary wheels 7 that support the rail from below via rail support members 6 located below the rail corresponding to each wheel (2a, 2b). What differs from the first embodiment is that the auxiliary wheels 7 located below the traveling vehicle essentially clamp and hold the rail from above and below, so that the traveling vehicle will not come off the rail and will be firmly held on the rail even in the event of strong winds, earthquakes, etc.

[0032] In this embodiment, the rail is sandwiched via the rail support member 6, but any configuration that sandwiches and holds the rail in this way can be considered to be the present invention. For example, a configuration in which the rail is sandwiched directly without the use of a rail support member, as shown in the schematic explanatory diagrams f(1) to (3) in Fig. 10, can also achieve the same effect and be considered to be this embodiment. Here, f(1) in FIG. 10 shows a structure in which the rail is sandwiched between wheels (2a, 2b) that support the weight of the traveling vehicle and auxiliary wheels 7 that support the rail from two different directions, thereby holding the rail in place. In addition, f(2) in Figure 10 is a wheel (2a, 2b) that supports the weight of the traveling vehicle, and auxiliary wheels 7 that support the rail from the left and right in the direction of travel clamp the rail and hold it in place. Also, in Fig. 10, f(3) shows a rail that is fixedly held in place by two wheels (with flanges) 1a and 1b that sandwich the rail. The front and rear wheels may each be configured with two such wheels, or in addition to this configuration, wheels (2a, 2b) (see Fig. 10, e, f(1), f(2)) that support the weight of the traveling vehicle may also be provided.

[0033] In this invention, "fixed" means that the running vehicle and the rail are connected (or in contact) to an extent that does not interfere with the rotation of the wheels of the running vehicle, and the two cannot be separated (having a structure that prevents the vehicle from leaving the rail).

[0034] 11, the auxiliary wheels 5 supporting the left and right auxiliary supports are each designed to roll on a flat concrete base, allowing for smooth running. Note that a running rail corresponding to the auxiliary wheels 5 may also be provided on the concrete base.

[0035] [Third embodiment] The third embodiment is the same as the first or second embodiment except that a cultivation shelf 22 is used that has two or more upper and lower shelves on which trays can be placed in order to increase the yield. In particular, by widening the spacing between adjacent shelves above and below the cultivation shelf 22 on which the trays are placed, the seedlings, saplings, stumps, plants, etc. (hereinafter referred to as "seedlings") placed on the lower shelves can be adequately exposed to natural sunlight, thereby allowing the seedlings to grow well (see Figures 12 to 14). The shelves of the cultivation shelves 22 may be of any type as long as they can accommodate trays, and may be configured, for example, as shown in Figures 13 and 14, with long rods 18 arranged side by side to support the bottom of the trays. Here, FIG. 12 shows a state in which the tray 70 is placed on the cultivation shelf 22 and the seedlings planted in the tray 70 are watered by a traveling vehicle. 13 and 14 show the actual state of seedlings growing in trays placed on the cultivation shelves. Although seedlings vary depending on the species, they are generally grown in trays until they reach a height of 30 to 50 cm.

[0036] Here, the cultivation shelves 22 in Figure 12 are shown as a two-tiered one with two shelves, one above and one below (see g in Figure 12, the right side of h in Figure 12, Figures 13 and 14), and a three-tiered one with three shelves, one above, one middle and one below (the left side of h in Figure 12).If trays are placed on each shelf to cultivate seedlings, if the spacing between adjacent shelves above and below is narrow, not much light will enter the trays placed on the lower level, and the seedlings there will not grow well. In this case, to allow adequate light in, the spacing must be at least 1.5 times the height of the seedlings. For example, if you are growing seedlings that are 30 cm tall (see Figure 12g), the spacing must be at least 45 cm above the height of the seedlings. This means that the height difference between the upper and lower trays must be at least NL=75cm. Also, since the height t0 of the tray on the lower tier from the ground is approximately 15 cm, the height of the tray on the upper tier is approximately 90 cm or more, and therefore the height TL of the watering nozzle from the ground, including the height of the seedlings on the upper tier (30 cm), is 120 cm or more.

[0037] Also, for example, if you are growing seedlings that are 50 cm tall (see the cultivation shelf to the right of h in Figure 12), as mentioned above, you will need a spacing of at least 75 cm, which is 1.5 times the height of the seedlings. In this case, the difference in height between the upper tray and the lower tray must be NH = 125 cm or more. Also, since the height t0 of the tray on the lower tier from the ground is approximately 15 cm, the height of the tray on the upper tier is approximately 140 cm or more, and therefore the height TH of the watering nozzle from the ground, including the height of the seedlings on the upper tier (50 cm), is 190 cm or more.

[0038] The cultivation shelves may have two or more levels, and may have three levels, for example. In this case, for example, if you are growing seedlings that are 30 cm tall (see the cultivation shelf on the left side of h in Figure 12), as mentioned above, you will need a distance of at least 75 cm from the height of the lower tray to the middle tray, and from the middle tray to the upper tray. Therefore, the difference in height between the lower tray and the upper tray needs to be NM = 150 cm or more. If you do the same calculation, the height of the watering nozzle from the ground, including the height of the seedlings on the upper tray, will be at least 195 cm.

[0039] Therefore, in the cultivation shelf of the present invention, if the distance between adjacent trays above and below is 75 cm or more, particularly 125 cm or more, and even more particularly 150 cm or more, the seedlings placed in the lower tray can be sufficiently exposed to the sunlight necessary for their growth (see Figures 13 and 14). Furthermore, if the height of the watering nozzle of the traveling vehicle is 120 cm or more from the ground, particularly 190 cm or more, and even more particularly 195 cm or more, the trays to be placed on the cultivation shelves of the present invention can be appropriately installed in two, three or more tiers, one above the other, thereby increasing the harvest yield (see Figures 13 and 14).

[0040] Furthermore, when placing and removing trays, if the task is performed by a person, there are height restrictions (for example, the average human height (approximately 172.9 cm for men and approximately 160.4 cm for women)), so it is desirable that the trays on the upper level be placed at a low height. In this case, it is desirable that the distance between adjacent trays on the cultivation shelf of the present invention be 75 cm or more and 150 cm or less (especially if there are two tiers, 75 cm or more and 125 cm or less), and that the height of the watering nozzle of the traveling vehicle be 120 cm or more and 195 cm or less from the ground (especially if there are two tiers, 120 cm or more and 190 cm or less).

[0041] In this way, in the third embodiment of the irrigation device, even if the height of the watering nozzle of the traveling vehicle is increased, it will not lose balance and fall over as in the past. Therefore, even if two or more trays are installed above and below the cultivation shelf, it is possible to water stably and appropriately while taking in natural light, and even on a limited land area, it is possible to further increase plant yields.

[0042] Since water flows from top to bottom, it is advisable to use a cultivation shelf with good drainage or a tray with good drainage (for example, with large drainage holes or many drainage holes). [Explanation of symbols]

[0043] 1 Wheel (Fringed Wheel 1a, Fringed Wheel 1b) 2 wheels (front wheels 2a, rear wheels 2b, side (fringe) 2c) 3 axles (front axle 3a, rear axle 3b) 4 Controller 5 Training wheels 6 Rail support member 7 Auxiliary wheels 8 Rail end detector 9 Rail end detector 10. Detection unit 11 Detection unit 12 pillars (main pillar 12a, secondary pillars 12b, 12c) 15 Support Arm 16 Nozzle pipe 17 Watering nozzle 18 rods (rods that make up the top and bottom shelves of the cultivation shelf) 20 Cultivation Area 22 Cultivation shelf 30 Hoses (liquid hoses, water supply hoses) 40 Cable (wire cable) 41 Paul 42 Paul 50 Hose holding pulley 70 trays 80 Electric wire R Running rail (rail) m motor p Pump (liquid delivery means) S Running vehicle T Tank

Claims

1. One running rail, a traveling vehicle that reciprocates on the traveling rail using at least two wheels, a front wheel and a rear wheel; a support arm extending in the left-right direction of the traveling vehicle from a main support pillar erected on the traveling vehicle; a nozzle pipe supported by the support arm and having a watering nozzle attached thereto; a liquid hose connected at one end to the nozzle tube; a liquid delivery means connected to the other end of the hose; a cable stretched along the moving area of ​​the traveling vehicle; a plurality of hose holding members for suspending the liquid hose on the cable so that the liquid hose can be moved; An irrigation device characterized by having a sub-support with auxiliary wheels that support the left and right sides of the support arm.

2. 2. The irrigation device according to claim 1, wherein the wheels and / or other wheels sandwich the running rail to fixedly support the running vehicle on the rail.

3. 3. The irrigation device according to claim 1, further comprising a cultivation shelf having two or more upper and lower shelves on which trays can be placed, and wherein the height of the sprinkler nozzle from the ground is 120 cm or more.

Images