JP3801698B2 - Aquarium equipment for plant growth test - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water tank apparatus for a plant growth test in which a pot in which a plant is planted is submerged in a water tank filled with water. Here, the plant mainly refers to paddy rice, and the present invention is particularly used for a deep water test of paddy rice.
[0002]
[Prior art]
In recent years, research on deep water tests has been actively conducted as part of countermeasures against cold damage of rice in the Tohoku region. In general, paddy rice is estimated to reduce the number of pollen and pollen pollination ability when the water temperature falls below a predetermined temperature during the heading stage when young panicles are formed. Deep water has been empirically implemented to protect the young panicles from the cold by introducing irrigation water up to about 20 cm from the root of rice.
[0003]
Because water has a higher specific heat than air, water with a temperature higher than the outside air plays a role of keeping warm, but if the young ears sink too deep into the water, conversely, depending on the rice cultivar, the growth may be hindered. There is a case. Therefore, a deep water test is conducted to investigate the depth of water that plays a role of keeping warm for various types of rice, and to investigate the optimum measures for cooling damage without hindering the growth of various types of rice.
[0004]
Conventionally, as an apparatus for conducting a deep water test, for example, there is a water tank 1 for a plant growth test as shown in FIG. The water tank 1 includes a fastening plate 2 in which a plurality of grooves for hooking hooks 3 are vertically connected to the inner walls on both sides facing each other, and the shelf plate 4 is attached to the water tank with the hooks 3 hooked at a predetermined position. It is comprised so that it may support in the predetermined height position inside. And the pot 5 containing the soil which planted paddy rice on the shelf board 4 was mounted. The water tank 1 is provided with a water level adjusting mechanism (not shown) for keeping the water level constant.
[0005]
[Problems to be solved by the invention]
However, in the conventional water tank 1 as described above, the height position of the shelf plate 4 cannot be adjusted unless the pot 5 is taken out of the water tank 1, and it is necessary to move the heavy pot 5 in and out of the water tank 1 one by one. Yes, he was forced to work hard and was inconvenient.
[0006]
In addition, when the pot 5 is taken in and out of the water tank 1, the water level in the water tank 1 fluctuates by the volume of the pot 5 or the like, so that it is necessary to replenish water or easily overflow. There has been a problem in that a large energy loss for temperature adjustment is caused along with water replenishment.
[0007]
Furthermore, since the position adjustment of the shelf plate 4 that receives the pot 5 is determined by the height position of the hook 3 that is hooked on the retaining plate 2 at what level position, the relative height position of the water surface with respect to the upper surface of the pot is determined. It is limited to crab and can only be adjusted roughly, and it is not suitable for detailed research.
[0008]
The present invention has been made by paying attention to the problems of the prior art as described above, and it is possible to adjust the relative height (relative water level) of the water surface with respect to the upper surface of the pot without removing the pot from the water tank. Also, for the purpose of providing an aquarium device for plant growth test that can adjust the relative water level without any energy loss due to new water replenishment, etc., and can freely adjust the relative water level in a stepless manner. Yes.
[0009]
[Means for Solving the Problems]
The gist of the present invention for achieving the above-described object resides in the following items.
[1] In a water tank apparatus (10) for plant growth test, wherein a pot (P) in which a plant is planted is submerged in a water tank (10a) filled with water,
While maintaining the amount of water in the water tank (10a) constant, the relative height position of the water surface with respect to the upper surface of the pot (P) is continuously adjusted while the pot (P) is submerged in the water tank (10a). A water tank apparatus (10) for a plant growth test characterized by including a water level adjustment mechanism capable of.
[0010]
[2] The water level adjusting mechanism includes a mounting table (20) on which the pot (P) is placed, an elevating means (21) for suspending the mounting table (20) in the water tank (10a), and an elevating means (21 The water tank apparatus (10) for plant growth tests according to claim 1, comprising operating means (22) for moving up and down.
[0011]
[3] The water tank for plant growth tests according to 1 or 2, wherein water adjusted to an appropriate temperature by the temperature controller (40) is circulated in the water tank (10a). Device (10).
[0012]
Next, the operation based on the above solution will be described.
According to the water tank apparatus (10) for plant growth test according to item 1, the pot (P) is taken out from the water tank (10a) while the pot (P) in which the plant is planted is submerged in the water tank (10a). The relative height position (relative water level) of the water surface relative to the upper surface of the pot (P) can be adjusted by the water level adjusting mechanism as it is.
[0013]
Since adjustment of the relative water level by the water level adjustment mechanism can be performed while keeping the amount of water in the water tank (10a) constant, there is almost no need for water replenishment with adjustment of the water level as in the conventional apparatus, There is no energy loss due to temperature adjustment based on new water supply.
[0014]
In addition, since the adjustment of the relative water level by the water level adjustment mechanism can be adjusted steplessly, the relative water level can be appropriately adjusted finely and freely without being limited to several steps of adjustment as in the conventional device, The accuracy in the plant growth test can be improved.
[0015]
According to the water tank device (10) for plant growth test according to item 2, the water level adjusting mechanism includes a mounting table (20) and lifting means (21) for suspending the mounting table (20) in the water tank (10a). ) And operating means (22) for raising and lowering the elevating means (21), the elevating means (21) is raised and lowered by the operating means (22), and the mounting table ( 20) can be adjusted steplessly to a desired height position reliably and easily.
[0016]
According to the water tank device for plant growth test (10) according to item 3, since the water adjusted to an appropriate temperature by the temperature control device (40) is circulated in the water tank (10a), The temperature environment of the soil in the underground part, that is, the pot (P) can be controlled using water as a medium.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment that represents the present invention will be described with reference to the drawings.
1 to 7 show an embodiment of the present invention.
As shown in FIG. 1, the water tank apparatus 10 for plant growth test is to sink a pot P in which plants are planted in a water tank 10a filled with water, and to circulate temperature-adjusted water in the water tank 10a. As shown in FIG. 8, the aquarium apparatus 10 is combined with various devices for controlling the water temperature in the aquarium 10a to constitute a system as a soil temperature adjusting apparatus.
[0018]
The water tank device 10 is a state in which the pot P is submerged in the water tank 10a while keeping the water amount in the water tank 10a, the constant water level device 30 that stabilizes the water in the water tank 10a at a preset water level, and the water amount in the water tank 10a. And a water level adjusting mechanism capable of continuously adjusting the relative height position of the water surface with respect to the upper surface of the pot P.
[0019]
As shown in FIGS. 1, 2 and 6, the aquarium 10a has a double wall structure, and its inner side is made up of both side walls 11, 12, a front wall 13, a rear wall 14, and a bottom wall 15, and the upper surface side is It is formed in an open cubic shape. A leg portion 16 is provided on the lower side of the bottom wall 15, and a water supply pipe 18 that is connected to a temperature control water inlet 17 penetrating to the side of the rear wall 14 is disposed on the upper side of the bottom wall 15. Yes. The water supply pipe 18 is provided with a plurality of small holes that discharge the temperature-controlled water over the entire length thereof.
[0020]
On the other hand, a drainage basin 19 is disposed substantially horizontally in the vicinity of the opened upper surface of the water tank 10a. Here, the draining basin 19 is a member that receives the water that is likely to overflow from the water tank 10a and sends the water received through the overflow pipe 19a to the constant water level device 30 described later. The height position of the drainage ridge 19 can be adjusted to some extent.
[0021]
The water level adjusting mechanism includes a mounting table 20 on which the pot P is placed, a lifting wire 21 that suspends the mounting table 20 in the water tank 10a, pulley groups 25 and 26 that can wind up the lifting wire 21, and pulley groups 25, And an operation handle 22 for rotating 26.
[0022]
The lifting / lowering wire 21 corresponds to lifting / lowering means here, but the lifting / lowering means is not limited to this, and may be constituted by, for example, a rack and pinion rack in addition to a rubber belt or a piano wire. The operation handle 22 corresponds to the operation means, but the operation means is not limited to this, and may be, for example, a switch when the pulley groups 25 and 26 are configured to be rotated electrically.
[0023]
The mounting table 20 is a tray-like member that is disposed substantially horizontally. A flange 20a is provided at the periphery, and a partition 20b is provided on the inner side. The raising / lowering wires 21 are arranged so as to suspend a total of four places, two on each side of the mounting table 20 inside the water tank 10a.
[0024]
As shown in FIGS. 6 and 7, the upper ends of the four elevating wires 21 fixed to the mounting table 20 have insertion holes 11a and 12a drilled on the upper side walls 11 and 12 of the water tank 10a. And extends outward and downward, extends toward the front wall 13 while being wound around guide pulleys 25a, 25b, 25c, and 25d forming a pulley group, and is wound around the take-up pulley 26. .
[0025]
A pair of take-up pulleys 26 and 26 on both sides of the water tank 10a are fixed to both ends of a drive shaft 27 of a gear box 23 fixed to the outside of the front wall 13. An operation handle 22 extends on the front side of the gear box 23. When the operation handle 22 is rotated forward or backward, the take-up pulleys 26 and 26 are rotated forward or backward together with the drive shaft 27 accordingly. It is set to be. That is, in the gear box 23, although not shown, a worm fixed to the rotation shaft at the base end of the operation handle 22, a worm wheel pivotally supported by the drive shaft 27 so as to be rotatably meshed with the worm, etc. The gear mechanism is built in.
[0026]
The gear mechanism in the gear box 23 is also provided with a stopper for restricting the rotation range of the operation handle 22 so as to limit the raising / lowering position of the mounting table 20 to a predetermined range. The specific configuration such as the manner in which the mounting table 20 is suspended by the lifting wire 21 and the arrangement positions of the pulley groups 25 and 26 that can wind up the lifting wire 21 are limited to those shown in FIG. It is not done.
[0027]
The constant water level device 30 is disposed on the side of the rear wall 14, and includes a ball tap 31 connected to an on-off valve (not shown) of the water supply port 32, and a filtration filter 36 is interposed below the ball tap 31. ing. According to the constant water level device 30, when the water in the water tank 10a decreases due to evaporation or the like and the position of the ball tap 31 is lowered along with the water level, the opening / closing valve of the water supply port 32 is opened and water is replenished. Is set so that the on / off valve of the water supply port 32 is closed again and the water supply is stopped.
[0028]
In addition to the water supply port 32, the constant water level device 30 is connected to a temperature-controlled water outlet 33, an upper overflow pipe 34, and a lower overflow pipe 35 that extend to the outside. The temperature-controlled water outlet 33 is for discharging the water circulated in the water tank 10a to the outside. The upper overflow pipe 34 plays a role of discharging excess water in the water tank 10a to the outside when the ball tap 31 and the open / close valve of the water supply port 32 become inoperable.
[0029]
On the other hand, the lower overflow pipe 35 plays a role of discharging water that cannot be sent to the upper part of the constant water level device 30 to the outside when the filter 36 is clogged. Further, as shown in FIG. 5, below the lower overflow pipe 35, a filter tank drain 37 for discharging water in the filter tank of the constant water level device 30 and a water for discharging water in the water tank 10a. A drain port 38 is provided.
[0030]
As shown in FIG. 8, the water tank device 10 described above is combined with various devices for controlling the water temperature in the water tank 10a to constitute a system as a soil temperature adjusting device. That is, the temperature-controlled water outlet 33 and the temperature-controlled water inlet 17 of the water tank apparatus 10 are connected to form a loop through the water distribution pipe 40, and a circulation pump 41 that forcibly circulates water in the middle of the water distribution pipe 40. And the heat exchanger 42 is arrange | positioned. The heat exchanger 42 includes a heating coil 43 and a cooling coil 44, and is configured so that water in the water tank 10a can be maintained at a desired water temperature by a microcomputer.
[0031]
Next, the operation will be described.
According to the above-described water tank apparatus 10, first, a pot P in which a plant is planted is placed on the mounting table 20, and raw water is supplied from the water supply port 32 into the water tank 10 a up to a water level preset by the constant water level apparatus 30. When the water in the water tank 10a decreases due to evaporation or the like, the open / close valve of the water supply port 32 is opened by the action of the constant water level device 30, and water is replenished. Closed, the amount of water in the water tank 10a is always kept constant.
[0032]
In order to adjust the relative height position (relative water level) of the water surface with respect to the upper surface of the pot P while the pot P on the mounting table 20 is submerged in the water tank 10a, the operation handle 22 of the water level adjusting mechanism is moved forward and backward. It can be turned in either direction. When the operation handle 22 is rotated in the forward direction, the take-up pulley 26 is rotated in the direction of taking up the elevating wire 21 via the gear box 23, and accordingly the mounting table 20 suspended by the elevating wire 21. Move up steplessly.
[0033]
When the operation handle 22 is rotated in the reverse direction, the take-up pulley 26 is rotated in the direction in which the lifting / lowering wire 21 is sent out via the gear box 23, and the mounting table 20 is moved downward steplessly. In this way, with the pot P still submerged in the water tank 10a, the water level adjusting mechanism does not remove the pot P from the water tank 10a, and the water level relative to the upper surface of the pot P (relative water level). ) Can be adjusted.
[0034]
Further, when the relative water level is adjusted by the water level adjusting mechanism, it is possible to carry out while keeping the amount of water in the water tank 10a constant without being accompanied by supply of new water or discharge of excess water. Therefore, according to the present water tank apparatus 10, there is almost no need to replenish water with the adjustment of the water level by the constant water level apparatus 30 by the volume of the pot P that has been put out of the water tank 10a as in the conventional apparatus. There is no energy loss in temperature adjustment or the like based on new water supply.
[0035]
Furthermore, since adjustment of the relative water level by the water level adjustment mechanism can be adjusted steplessly, the relative water level can be appropriately adjusted finely and freely without being limited to rough adjustment in several steps as in the conventional apparatus. And the accuracy in the plant growth test can be improved. As described above, according to the water level adjusting mechanism shown in FIGS. 6 and 7, the lifting wire 21 that suspends the mounting table 20 in the water tank 10 a and the pulley groups 25 and 26 that can wind up the lifting wire 21. The mounting table 20 can be adjusted to a desired height position reliably and easily with a very simple configuration having the main part as a main part.
[0036]
As shown in FIG. 8, if this aquarium apparatus 10 is a part of a system as a soil temperature control apparatus, the water in the aquarium 10a is controlled not only to maintain a constant amount but also to maintain a desired water temperature. And the soil temperature in the pot P can also be adjusted suitably. That is, the water discharged from the temperature-controlled water outlet 33 of the water tank apparatus 10 is forcedly circulated in the water distribution pipe 40 by the action of the circulation pump 41 and adjusted to a predetermined temperature by the heat exchanger 42 in the middle of the temperature-controlled water. The water is again supplied from the inlet 17 into the water tank 10a.
[0037]
In addition, the water tank apparatus for plant growth tests according to the present invention is not limited to the specific configuration according to the above-described embodiment. For example, the water level adjusting mechanism is not limited to the illustrated one, and the mounting table may be configured to move up and down by expansion means that expands by air pressure disposed below the mounting table. Alternatively, the mounting table is fixed at a fixed position in the water tank, and the water surface relative to the upper surface of the pot is relatively changed according to the volume change by the expansion means that is inflated by the air pressure provided at the position where the water tank is normally immersed in the water. You may comprise so that a height position may be adjusted. Further, the operation of the pulley group is not limited to manual operation, and may be configured using power such as a motor. Further, the water tank apparatus may be used alone without being combined with various devices for controlling the water temperature in the water tank.
[0038]
【The invention's effect】
According to the aquarium device for plant growth test according to the present invention, the water level in the aquarium is kept constant, and the relative height position of the water surface with respect to the upper surface of the pot is stepless while the pot is kept submerged in the aquarium. Since the water level adjustment mechanism is adjustable, the relative height position of the water surface with respect to the top surface of the pot can be adjusted without taking the pot out of the water tank. In addition, there is no energy loss due to temperature adjustment or the like associated with water replenishment, and the relative water level can be adjusted finely and freely steplessly, so that the accuracy in the plant growth test can be improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an internal structure of a water tank apparatus for a plant growth test according to an embodiment.
FIG. 2 is a side view of a water tank apparatus for plant growth tests according to one embodiment.
FIG. 3 is a plan view of a water tank apparatus for a plant growth test according to one embodiment.
FIG. 4 is a front view of a water tank apparatus for a plant growth test according to one embodiment.
FIG. 5 is a rear view of a water tank apparatus for plant growth test according to one embodiment.
FIG. 6 is a perspective view schematically showing a water level adjusting mechanism of a water tank apparatus for plant growth test according to one embodiment.
FIG. 7 is a cross-sectional view schematically showing a water level adjusting mechanism of a water tank apparatus for plant growth test according to one embodiment.
FIG. 8 is an explanatory diagram schematically showing a soil temperature control device including a water tank device for plant growth tests according to one embodiment.
FIG. 9 is a cross-sectional view showing a conventional water tank apparatus for plant growth tests.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Water tank apparatus 10a ... Water tank 20 ... Mounting stand 21 ... Elevating wire (elevating means)
22 ... Operation handle (operation means)
23 ... Gearboxes 25a, 25b, 25c, 25d ... Guide pulley (pulley group)
26 ... Pulley pulley (pulley group)
30 ... Constant water level device 40 ... Water distribution pipe 41 ... Circulation pump 42 ... Heat exchanger

Claims (3)

In the aquarium device for plant growth test, which is a plant in which a pot planted is submerged in a water tank filled with water,
A water level adjustment mechanism capable of continuously adjusting the relative height position of the water surface with respect to the upper surface of the pot while keeping the pot submerged in the water tank while keeping the amount of water in the water tank constant. Aquarium equipment for plant growth tests. The water level adjusting mechanism includes a mounting table on which the pot is placed, an elevating unit for suspending the mounting table in a water tank, and an operating unit for elevating the elevating unit. The water tank apparatus for plant growth tests according to 1. The water tank apparatus for plant growth tests according to claim 1 or 2, wherein water adjusted to an appropriate temperature by a temperature control apparatus is circulated in the water tank.

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