JP2015216869A - Drain system and cultivation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain system which does not need to individually position water level rise restricting means for restricting rise of a water level and a pipe body for adjusting a water level.SOLUTION: A drain system comprises: water level rise restricting means 42 which is provided for a container 72 into which fluid is supplied, and for restricting rise of a water level in the container 72 by discharging fluid; and a pipe body 44 which is provided integrally with the water level rise restricting means 42, in which an inflow port 44A is positioned in the container, an uppermost part 44B extending upward from the inflow port is below a discharge port 42A of the water level rise restricting means 42, and the outflow port is positioned below the inflow port 44A and outside the container 72.

Description

  The present invention relates to a drainage device and a cultivation device.

  An apparatus for automatically supplying and draining water into a container such as a planter in plant cultivation or the like is known. For example, Patent Document 1 discloses a device that supplies water with a pump and automatically drains water with a siphon tube when the water level reaches a certain level.

JP-A-8-70717

  In the water supply / drainage apparatus described in Patent Document 1, a water level adjusting pipe (overflow pipe) that suppresses the rise in water level is provided together with a siphon pipe. In order to adjust the amount of water supply to an appropriate amount, the positional relationship between the water level adjustment pipe (overflow pipe) and the siphon pipe is important, but each is separately attached to the bottom of the pot pan (container) , Positioning is difficult.

  There is also a method of attaching the water stop rubber to the bottom of the pot pan (container) after adjusting the positional relationship by attaching the water level adjusting pipe (overflow pipe) and the siphon pipe to one water stop rubber. However, since the water-stopping rubber deteriorates over time, it is necessary to position the water level adjusting pipe (overflow pipe) and the siphon pipe every time the water-stopping rubber is replaced.

  In view of the above facts, an object of the present invention is to provide a drainage device that does not require individual positioning of a water level rise suppressing means and a water level adjusting pipe that suppress the rise in water level.

  The drainage device according to claim 1 is provided in a container to which a fluid is supplied, and is provided integrally with a water level rise suppression unit that discharges the fluid and suppresses a rise in the water level in the container, and the water level rise suppression unit. The inflow port is located in the container, the uppermost portion extending upward from the inflow port is below the discharge port of the water level rise suppression means, and the outflow port is below the inflow port and outside the container. A tubular body positioned.

  According to the said structure, since the pipe body for water level adjustment is integrally provided with the water level raise suppression means, it is not necessary to position individually. Further, space can be saved as compared with the case where each is provided separately.

  In addition, a pipe body means the thing which has a hollow flow path here. Further, the term “integral” means that they are positioned with respect to each other by being integrally molded or fixed, adhered, inserted, or the like.

  According to a second aspect of the present invention, the water level rise suppression means is an overflow pipe penetrating the container, and the tubular body is a siphon pipe provided in the overflow pipe.

  According to the said structure, a raise of the water level in a container can be suppressed with an overflow pipe | tube, and the water level in a container can be adjusted to below a fixed water level with a siphon pipe | tube. Moreover, since the siphon tube is provided in the overflow tube, space can be saved.

  The drainage device according to claim 3, wherein the overflow pipe passes through the bottom of the container, the siphon pipe is inserted into the overflow pipe, and is fitted into a recess formed in the discharge port of the overflow pipe. Yes.

  According to the said structure, a siphon pipe | tube and an overflow pipe | tube can be integrally provided by fitting a siphon pipe | tube to the recessed part formed in the overflow pipe | tube, and both can be positioned simultaneously.

  In the drainage device according to a fourth aspect, the siphon tube is integrally formed with the overflow tube.

  According to the above configuration, since the siphon tube and the overflow tube are formed by integral molding, they can be positioned at the molding stage.

  The drainage device according to claim 5 is provided with a drainage flow rate adjusting device that is connected to the siphon tube and makes the vertical position of the outlet of the siphon tube variable.

  According to the above configuration, since the vertical position of the outlet of the siphon tube can be changed by the drainage flow rate adjusting device, the flow rate of the drainage can be adjusted even after the siphon tube is positioned.

  The cultivation apparatus of Claim 6 is a planter as the container, the drainage apparatus of any one of Claims 2 to 5, and a fluid such as water or nutrient solution from the overflow pipe or the siphon pipe. A storage tank to be drained, and supply means for supplying fluid from the storage tank into the planter.

  According to the said structure, by providing the drainage device in any one of Claims 2-5 in a planter, and also providing a storage tank and a supply means, water and nutrient can be appropriately applied with respect to cultivation objects, such as a plant. It can be set as the cultivation apparatus which can supply a liquid.

  In the cultivation apparatus according to claim 7, a groove into which a water stop member is fitted is formed on the outer peripheral surface of the overflow pipe, and the overflow pipe is provided at the bottom of the planter via the water stop member. Attached to the holder.

  According to the said structure, the siphon pipe provided in the overflow pipe and the overflow pipe is attached to the holder provided in the bottom part of the planter via the water stop member. Therefore, the overflow pipe and the siphon pipe can be easily and reliably fixed and positioned on the planter bottom.

  ADVANTAGE OF THE INVENTION According to this invention, the drainage apparatus which does not need to position the water level raise suppression means and the pipe body for water level adjustment which suppress a water level rise individually can be provided.

(A) is a fragmentary sectional view which shows the drainage apparatus which concerns on Embodiment 1, (B) is the fragmentary perspective view. It is a fragmentary sectional view showing the drainage device concerning Embodiment 2. (A) is a fragmentary sectional view which shows the drainage apparatus which concerns on Embodiment 3, (B) is the fragmentary perspective view. (A) is a perspective view which shows the drainage apparatus which concerns on Embodiment 4, (B) is the AA sectional drawing. (A) is side surface sectional drawing which shows the drainage apparatus which concerns on Embodiment 5, (B) is the BB sectional drawing. It is sectional drawing which shows the drainage apparatus which concerns on Embodiment 6. It is a general view of the cultivation apparatus provided with the drainage device of Embodiment 4.

  Hereinafter, an example of a drainage device according to the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, the drainage apparatus 10 of Embodiment 1 is comprised from the discharge port 12 as a water level rise suppression means, and the inverted U-shaped pipe body 14 which consists of resin, such as a polyvinyl chloride.

  The discharge port 12 is a through hole formed in the side surface of the container 16. Since the fluid such as water or nutrient solution supplied to the container 16 is discharged from the discharge port 12 to the outside of the container 16, the rise of the water level in the container 16 is suppressed and the fluid does not overflow from the upper end of the container 16. .

  The pipe body 14 extends upward from the inlet 14A to the uppermost part (inverted U-shaped apex) 14B, and extends from the uppermost part 14B to the outlet 14C located below the inlet 14A. This is a siphon tube that produces The siphon tube 14 passes through the discharge port 12, and the inflow port 14 </ b> A is disposed inside the container 16 and the outflow port 14 </ b> C is disposed outside the container 16. The siphon tube 14 is fixed and positioned in a recess 12 </ b> A formed on the inner peripheral surface of the discharge port 12.

  When the level of the fluid supplied to the container 16 reaches the height of the uppermost part 14B of the siphon tube 14, the fluid in the container 16 is discharged out of the container 16 through the siphon tube 14 according to the principle of siphon. When the supply of the fluid into the container 16 is stopped, the fluid in the container 16 continues to be automatically discharged until the water level reaches the height of the inlet 14A of the siphon tube 14.

(Embodiment 2)
In the second embodiment, as shown in FIG. 2, the drainage device 20 includes an overflow pipe (an example of a water level rise suppression means) 22 made of a resin such as polyvinyl chloride, and a siphon pipe (an example of a pipe body) 24. Has been.

  The overflow tube 22 is a hollow circular tube or a polygonal tube, and the siphon tube 24 is an inverted U-shaped hollow tube similar to that of the first embodiment. The siphon tube 24 is positioned so that the uppermost portion 24 </ b> A is positioned below the discharge port 22 </ b> A of the overflow tube 22, and is fixed to the overflow tube 22 by being bonded or welded. Further, the overflow pipe 22 and the siphon pipe 24 are fitted in a through hole 16 </ b> A formed in the bottom of the container 16.

(Embodiment 3)
In the third embodiment, as shown in FIG. 3, the drainage device 30 includes an overflow pipe (water level rise suppression means) 32 and a siphon pipe (tube body) 34 having the same shape as in the first and second embodiments. Yes.

  The overflow pipe 32 is disposed along the side surface of the container 16 and is integrally formed with the container 16. A discharge port 32 </ b> A of the overflow pipe 32 is formed on the side surface of the container 16.

  On the other hand, the siphon tube 34 is inserted into the overflow tube 32, and is fixed and positioned in a recess 32B formed on the inner peripheral surface of the discharge port 32A. Further, the inflow port 34 </ b> A of the siphon tube 34 is disposed so as to protrude into the container 16 from the discharge port 32 </ b> A of the overflow tube 32.

  According to the drainage devices 10, 20, and 30 of the first to third embodiments, the siphon tubes 14, 24, and 34 that are tubular bodies are fixed and positioned to the discharge port 12 and the overflow tubes 22 and 32 that are water level rise suppression means. ing. Therefore, when arranging the drainage devices 10, 20, and 30 in the container 16, it is not necessary to individually position the pipe bodies 14, 24, and 34 and the water level rise suppressing means 12, 22, and 32. Space can be saved as compared with the case where they are provided separately.

(Embodiment 4)
In the fourth embodiment, as shown in FIG. 4, the drainage device 40 is composed of an overflow pipe (water level rise suppression means) 42 and a siphon pipe (tube body) 44 having the same shape as in the first to third embodiments. Yes.

  The overflow pipe 42 is a hollow circular pipe, and a recess 43 is formed in the peripheral portion of the discharge port 42 </ b> A by being partially cut away. The depth (height) dimension of the recess 43 is substantially the same as or larger than the diameter of the siphon tube 44, and the width dimension of the upper end of the recess is slightly smaller than the diameter of the siphon tube 44. Further, the lower end shape of the recess 43 has the same curvature as that of the siphon tube 44. Furthermore, a groove 48 into which a water stop member 46 such as an O-ring is fitted is formed on the outer peripheral surface of the lower end portion of the overflow pipe 42.

  The siphon tube 44 is integrally fixed to the overflow tube 42. Specifically, the siphon tube is inserted into the overflow tube 42, and the uppermost portion 44 </ b> B is fixed to the overflow tube 42 by being press-fitted into the recess 43 of the overflow tube 42. At this time, the inlet 44 </ b> A of the siphon tube 44 is disposed so as to protrude out of the overflow tube 42.

  According to the drainage device 40 of the fourth embodiment, the siphon tube 44 and the overflow tube 42 can be integrally fixed by press-fitting the siphon tube 44 into the recess 43 of the overflow tube 42. Therefore, the siphon tube 44 and the overflow tube 42 can be positioned easily and reliably without using an adhesive or the like. Further, since the siphon tube is inserted into the overflow tube 42, space can be saved.

(Embodiment 5)
In the fifth embodiment, as shown in FIG. 5, the drainage device 50 is composed of an overflow pipe (water level rise suppression means) 52 and a siphon pipe (tube body) 54 formed by integral molding.

  The overflow pipe 52 has a hollow quadrangular prism shape, and a first partition wall 56 that divides the internal space into two in the axial direction of the overflow pipe 52 is formed inside the overflow pipe 52. One space has an upper end and a lower end opened to serve as a flow path for the overflow pipe 52, and the other space serves as a flow path for the siphon pipe 54. That is, the siphon tube 54 is provided in the overflow tube 52.

  In the siphon tube 54, a part of the flow path is partitioned in the axial direction by the second partition wall 58, whereby an inverted U-shaped flow path is formed. An inflow port 54A of the siphon tube 54 is formed on the side surface of the overflow pipe 52 at one end of the flow path, and an outflow port 54B is formed at the other end of the flow path.

  The drainage device 50 is disposed along the inner peripheral surface of the side surface of the container 16 and is fitted in a through hole 16 </ b> A formed in the bottom of the container 16. At this time, the inlet 54 </ b> A of the siphon tube 54 is located inside the container 16, and the outlet 54 </ b> B is located outside the container 16. The drainage device 50 may be integrally formed with the container 16. Further, the drainage device 50 may have a columnar shape or the like instead of a rectangular parallelepiped shape.

  According to the drainage device 50 of the fifth embodiment, by dividing the internal space of the overflow pipe 52 into two by the first partition wall 56, one space can be used as the flow path of the siphon pipe 54. Therefore, the overflow pipe 52 and the siphon pipe 54 can be easily formed integrally.

(Embodiment 6)
In the sixth embodiment, as shown in FIG. 6, the drainage device 60 is composed of an overflow pipe (water level rise suppressing means) 62 and a siphon pipe (tube body) 64 formed by integral molding.

  The overflow pipe 62 is a hollow circular pipe made of a resin such as polyvinyl chloride, and a groove 62A in which a water stop member 46 such as an O-ring is fitted is formed on the outer peripheral surface of the lower end portion. The siphon tube 64 is an inverted U-shaped hollow tube and is disposed in the overflow tube 62, and the inflow port 64 </ b> A protrudes from the side of the overflow tube 62 to the outside of the overflow tube 62.

  Further, a plurality of spline grooves are formed along the axial direction of the siphon tube 64 at the peripheral portion of the outlet 64B of the siphon tube 64. A drainage flow rate adjusting pipe (an example of a drainage flow rate adjusting device) 66 having an outer diameter slightly larger than that of the siphon tube 64 is slidably attached to the spline groove.

  According to the siphon principle, the flow velocity of the fluid flowing in the siphon tube 64 changes due to the difference in height position (water head difference) between the inlet 64A and the outlet 64B. That is, when the water head difference is small, the flow velocity is slow, and when the water head difference is large, the flow velocity is fast. Therefore, the flow rate of the fluid flowing through the siphon tube 64 can be adjusted by sliding the drain flow rate adjusting tube 66 up and down to change the height position of the outlet 64B.

  By forming a male screw on the peripheral portion of the outlet 64B of the siphon tube 64, forming a female screw on the inner peripheral surface of the drainage flow rate adjustment tube 66, and screwing the drainage flow rate adjustment tube 66 to the siphon tube 64, The drainage flow rate adjusting pipe 66 may be slidably attached up and down.

  According to the drainage device 60 of the sixth embodiment, since the overflow pipe 62 and the siphon pipe 64 are formed by integral molding, the overflow pipe 62 and the siphon pipe 64 are individually provided when the drainage device 60 is disposed in the container 16. There is no need for positioning. Further, since the flow rate of the fluid flowing in the siphon pipe 64 can be adjusted by the drainage flow rate adjusting pipe 66, the amount of fluid discharged per unit time can be adjusted after the drainage device 60 is disposed in the container 16. .

  Next, an example of the cultivation apparatus in which the drainage apparatus according to the present invention is arranged will be described in detail with reference to FIG. In addition, in FIG. 7, although the example which has arrange | positioned the drainage apparatus 40 of Embodiment 4 to the cultivation apparatus 70 was shown, in the cultivation apparatus 70, any drainage apparatus 10, 20, 30, 40 of Embodiments 1-6 is shown. 50, 60 may be arranged.

  As shown in FIG. 7, the cultivation device 70 includes a planter 72 as the container 16, a storage tank 74 that stores fluid, a supply unit 76 that supplies fluid from the storage tank 74 to the planter 72, and a drainage device 40. And a fluid discharge pipe 78.

  The planter 72 is a box-shaped container having an open top. A raised cultivation floor 80 is formed in the planter 72, and a plurality of plants 82 are planted on the cultivation floor 80.

  The storage tank 74 is a box-shaped container whose top surface is open or closed. The storage tank 74 is disposed below the planter 72 and stores fluid such as water and nutrient solution supplied to the planter 72 and fluid discharged from the planter 72 through the drainage device 40.

  The supply means 76 includes a fluid supply pipe 84, a pump 86, a controller 88, and an external supply means 90 for supplying a fluid such as water or nutrient solution from the outside.

  The fluid supply pipe 84 is a hollow pipe that supplies fluid from the storage tank 74 to the planter 72, and an upper end is connected to a through hole 72 </ b> A formed in the bottom surface of the planter 72. The lower end is connected to a pump 86 disposed in the storage tank 74. The pump 86 is for pumping the fluid in the storage tank 74 into the planter 72 positioned above, and is controlled by the control unit 88.

  The external supply means 90 is for supplying a fluid into the planter 72 from the outside, and is controlled by the control unit 88. The external supply means 90 may supply fluid into the storage tank 74 instead of the planter 72. Further, the fluid may be supplied into the planter 72 or the storage tank 74 by any means without providing the external supply means 90.

  The fluid discharge pipe 78 is a hollow pipe having an internal thread formed at the upper end, and is used for allowing the fluid drained from the drainage device 40 to flow into the storage tank 74. A holder 92 having an external thread formed at the lower end is screwed to the upper end of the fluid discharge pipe 78, and the fluid discharge pipe 78 is connected to the drainage device 40 and the planter 72 via the holder 92.

  The holder 92 is a hollow tube having a flange 92A formed at the upper end. The holder 92 is fitted into a through-hole 72 </ b> B formed on the bottom surface of the planter 72, and the flange 92 </ b> A is locked to the bottom surface of the planter 72 via an O-ring 94. A drainage device 40 is fitted to the inner peripheral surface of the holder 92 via a water stop member 46 such as an O-ring.

  Since the drainage device 40 and the holder 92 are connected via the water stop member 46, fluid does not leak from the gap between the drainage device 40 and the holder 92, and the drainage device 40 is connected to the holder 92 easily and reliably. can do.

  Next, a fluid circulation procedure by the cultivation apparatus 70 will be described. First, fluid such as water or nutrient solution is supplied into the storage tank 74 by the external supply means 90 or any means. Then, the controller 86 operates the pump 86 to supply the fluid in the storage tank 74 into the planter 72 through the fluid supply pipe 84.

  When the water level of the fluid in the planter 72 reaches the height of the uppermost portion 44B of the siphon tube 44 of the drainage device 40, the fluid in the planter 72 begins to be discharged out of the planter 72 through the siphon tube 44 due to the siphon principle. Since the amount of fluid supplied into the planter 72 is larger than the amount discharged from the siphon tube 44, the water level in the planter 72 continues to rise.

  Thereafter, when the water level in the planter 72 reaches the height of the discharge port 42 </ b> A of the overflow pipe 42, the fluid is discharged out of the planter 72 through the overflow pipe 42. Therefore, the rise of the water level in the planter 72 is suppressed, and the fluid does not overflow from the upper end of the planter 72.

  The control unit 88 includes a timer (not shown), and when a certain period of time has elapsed, the pump 86 is stopped and the supply of fluid into the planter 72 is stopped. When the supply of fluid is stopped, the fluid in the planter 72 is discharged out of the planter 72 through the siphon tube 44, and the water level is lowered to the height of the inlet 44A of the siphon tube 44. The fluid discharged out of the planter 72 flows into the storage tank 74 through the fluid discharge pipe 78.

  Through the above procedure, fluid such as water or nutrient solution circulates in the planter 72 and the storage tank 74, and water, nutrient solution, or the like can be automatically supplied to the plant 82 in the planter 72.

  A sensor for monitoring the water level in the planter 72 is provided, and when the water level is lowered to the height of the inlet 44A of the siphon pipe 44 by the control unit 88, the pump 86 is operated, and the water level is discharged from the outlet 42A of the overflow pipe 42. The control may be performed so that the pump 86 is stopped when the height reaches the height.

  In the cultivation apparatus 70 of the present invention, the overflow pipe 42 and the siphon pipe 44 are used as the drainage apparatus 40, and therefore the rise of the maximum water level is suppressed by the overflow pipe 42 and the water level is adjusted by the siphon pipe 44 at the inlet 44A. Can be lowered to height. Therefore, after sufficiently supplying water, nutrient solution, or the like to the roots of the plant 82 in the planter 72, the root rot of the plant can be prevented by lowering the water level to a position lower than the root height of the plant 82.

(Other embodiments)
In addition, although an example of embodiment was demonstrated about this invention, this invention is not limited to this embodiment, Other various embodiment is possible within the scope of the present invention.

  For example, although the siphon tubes 14, 24, 34, 44, 54, and 64 of the first to sixth embodiments are inverted U-shaped tubes, they only need to function as siphons. It may be a body.

  Moreover, in the cultivation apparatus 70, although the storage tank 74 was arrange | positioned under the planter 72, another similar planter is arrange | positioned between the planter 72 and the storage tank 74, and the fluid discharged | emitted from the planter 72 is different. The planter may be configured to be supplied to the planter and then discharged to the storage tank 74 from another planter.

10, 20, 30, 40, 50, 60 Drainage device 12 Discharge port (an example of water level rise suppression means)
12A Recesses 14, 24, 34, 44, 54, 64 Siphon tube (an example of a tube)
14A, 34A, 44A, 54A, 64A Inlet 14B, 24A, 44B Top 14C, 54B, 64B Outlet 16 Container 22, 32, 42, 52, 62 Overflow pipe (an example of water level rise suppression means)
22A, 32A, 42A Discharge port 46 Water stop member 48, 62A Groove 66 Drain flow rate adjustment pipe (an example of a drainage flow rate adjustment device)
70 Cultivation equipment 72 Planter (example of container)
74 Storage tank 76 Supply means 92 Holder

In view of the above-described facts, an object of the present invention is to provide a drainage device that does not require separate positioning of an overflow pipe for suppressing a rise in water level and a siphon pipe for water level adjustment.

The drainage device according to claim 1 is provided in a container to which a fluid is supplied, and is provided in an overflow pipe that discharges the fluid and suppresses a rise in the water level in the container, and is provided in the overflow pipe. positioned on the inner and the overflow tube outside, the flow there through the inlet from below is the top extending in the upward outlet of the overflow pipe, siphon tube outlet is positioned below and outside the container from the inlet And comprising.

According to the said structure, a raise of the water level in a container can be suppressed with an overflow pipe | tube, and the water level in a container can be adjusted to below a fixed water level with a siphon pipe | tube. Here, since the siphon tube for adjusting the water level is provided in the overflow tube , there is no need to position it individually. Further, space can be saved as compared with the case where each is provided separately.

The drainage device according to claim 2 , wherein the overflow pipe penetrates the bottom of the container, the siphon pipe is inserted into the overflow pipe, and is fitted into a recess formed in the discharge port of the overflow pipe. Yes.

In the drainage device according to a third aspect , the siphon pipe is integrally formed with the overflow pipe.

A drainage device according to a fourth aspect of the present invention includes a drainage flow rate adjusting device that is connected to the siphon tube and that allows the vertical position of the outlet of the siphon tube to be variable.

Cultivation device according to claim 5, the planter as the container, the drainage device according to any one of claims 1 to 4, wherein the overflow pipe or said siphon tube or we discharge the water is the water or nourishing A storage tank for storing a fluid such as a liquid for a certain period of time; and a supply means for supplying the fluid from the storage tank into the planter.

According to the above arrangement, the drainage device according to any one of claims 1 to 4, provided in the planter, further by providing a reservoir or supply means, suitably water or hydroponic against cultivation object of plants such as It can be set as the cultivation apparatus which can supply a liquid.

In the cultivation apparatus according to claim 6 , a groove into which a water stop member is fitted is formed on the outer peripheral surface of the overflow pipe, and the overflow pipe is provided at the bottom of the planter via the water stop member. Attached to the holder.

ADVANTAGE OF THE INVENTION According to this invention, the drainage apparatus which does not need to position individually the overflow pipe | tube and the siphon pipe | tube for water level adjustment which suppress a water level rise can be provided.

Cultivation device according to claim 1, a planter which fluid is supplied, the provided planters, and suppress the level rise of said planter to drain fluid overflow pipe, provided in the overflow pipe, the flow The inlet is located inside the planter and outside the overflow pipe, the uppermost portion extending upward from the inlet is below the outlet of the overflow pipe, and the outlet is below the inlet and outside the planter . A drainage device comprising: a siphon pipe positioned; a storage tank for storing a fluid such as water or nutrient solution drained from the overflow pipe or the siphon pipe for a certain period of time; and a fluid from the storage tank into the planter Supply means for supplying .

According to the said structure, the raise of the water level in a planter can be suppressed with an overflow pipe | tube, and the water level in a planter can be adjusted to below a fixed water level with a siphon pipe | tube. Here, since the siphon tube for adjusting the water level is provided in the overflow tube, there is no need to position it individually. Further, space can be saved as compared with the case where each is provided separately.
Moreover, it can be set as the cultivation apparatus which can supply water and nutrient solution appropriately with respect to cultivation objects, such as a plant, by providing a storage tank and a supply means.

The cultivation apparatus according to claim 2, wherein the overflow pipe passes through a bottom portion of the planter , the siphon pipe is inserted into the overflow pipe, and is fitted into a recess formed in the discharge port of the overflow pipe. Yes.

The cultivation apparatus of Claim 4 is equipped with the drainage flow rate adjustment apparatus which is connected to the said siphon tube and makes the up-and-down position of the said outflow port of the said siphon tube variable.

In the cultivation apparatus according to claim 5 , a groove into which a water stop member is fitted is formed on the outer peripheral surface of the overflow pipe, and the overflow pipe is provided at the bottom of the planter via the water stop member. Attached to the holder.

Claims (7)

A water level rise suppression means that is provided in a container to which a fluid is supplied and discharges the fluid to suppress the rise of the water level in the container;
Provided integrally with the water level rise suppression means, the inflow port is located in the container, the uppermost portion extending upward from the inflow port is below the discharge port of the water level rise suppression means, and the outflow port is A pipe located below the inlet and outside the container;
A drainage device comprising: The water level rise suppression means is an overflow pipe penetrating the container,
The drainage device according to claim 1, wherein the pipe body is a siphon pipe provided in the overflow pipe.   The drainage device according to claim 2, wherein the overflow pipe penetrates the bottom of the container, the siphon pipe is inserted into the overflow pipe, and is fitted into a recess formed in the discharge port of the overflow pipe. .   The drainage device according to claim 2, wherein the siphon tube is formed integrally with the overflow tube.   The drainage device according to any one of claims 2 to 4, further comprising a drainage flow rate adjusting device connected to the siphon tube and configured to change a vertical position of the outlet of the siphon tube. A planter as the container;
The drainage device according to any one of claims 2 to 5,
A storage tank in which fluid such as water or nutrient solution is drained from the overflow pipe or the siphon pipe;
Supply means for supplying fluid from the storage tank into the planter;
A cultivation device comprising:   A groove into which a water stop member is fitted is formed on an outer peripheral surface of the overflow pipe, and the overflow pipe is attached to a holder provided at the bottom of the planter via the water stop member. 6. The cultivation apparatus according to 6.

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