JP2017051137A - Water level adjustment device for paddy field with rice field dam function and method for damming rice field - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paddy water level adjustment device with a paddy dam mechanism that can impart a dam function in a rice field by storing increased paddy water from a rice field and releasing the water little by little to prevent flooding on a downstream side, using a water level adjuster installed on a ridge, and to provide a method for damming the paddy field.SOLUTION: In a water level adjuster 1, a rear wall 2C and a pair of side walls 2B are erected on a bottom plate so as to be formed in a substantially rectangular shape in a plan view, and a pressure receiving plate 3 and a water level adjusting plate 4 are inserted. A dam plate 6 of a rice paddy dam mechanism 5 made of aluminum has a taller height than the water level adjusting plate 4, and a water discharge hole of a smaller diameter than a drain hole of the rear wall 2C is provided in the lower side. The dam plate 6 and support plates 7 of both ends are formed so as to be a substantially H shape in a plan view. The paddy dam mechanism 5 is inserted between the rear wall 2C of the water level adjuster 1 and the water level adjusting plate 4, and the water level adjusting plate 4 is stored in the storage tank 8 and is released little by little from the water discharge hole.SELECTED DRAWING: Figure 1

Description

The present invention relates to paddy field water provided with a paddy dam mechanism for the purpose of preventing paddy field dams by controlling the release of paddy water by providing paddy field water level regulators with paddy dam mechanisms. The present invention relates to a position adjusting device and a rice field damification method.

  Since paddy fields need to adjust the water level according to the growing season of rice, a water level adjuster (also called a water level adjusting paddy) is installed on the shore. There are various types of water level adjusters, but as an example, the water level adjuster is generally composed of a pressure receiving plate that receives earth pressure in the main body and a water level adjusting plate whose height position is regulated by pressure contact with the pressure receiving plate. (Patent Document 1).

Japanese Patent No. 4817159

By the way, in recent years, abnormal weather has become normal, and local heavy rains have occurred in various parts of the country. On the other hand, the loss of water capacity in the forests has caused problems such as sediment loss and frequent flood damage. Therefore, the technology aimed at preventing the occurrence of disasters caused by the rice field dam, which makes the water storage capacity of the paddy field function as a dam when it rains, and prevents the rain that falls on the paddy field from flowing down at once and causing flood damage and debris flow disasters. Is required.

  However, the conventional water level adjuster is intended to adjust the water level of the paddy field, and does not consider how to deal with a large amount of rain on the paddy field. It is discharged from the drainage hole of the main body, and when the discharge amount of the drainage hole cannot be handled, it is overflowing from the main body.

And even if the rice field has a water storage capacity and functions as a dam, the conventional water level regulator for paddy fields is not configured to store rainwater and release it little by little. For this reason, in the case of heavy rain, the current situation is that the water level adjustment plate can be raised to the maximum and raised, or a separate long plate can be installed in the water level adjustment device.
However, there is a problem that the work at the time of rain is dangerous and it is not effective because there are some people who are not cooperating with the dam and there are no people like part-time farmers because it is troublesome.
Therefore, a proposal has been made to make a paddy field into a dam. As an example, there is a method in which one side of a dam plate is bitten and one side is floated and drained from a triangular opening. However, since it is not the structure which stores paddy water temporarily and discharges little by little, there exists a problem that the setting of the discharge amount of water is troublesome.

  The present invention was made as a result of inventor's earnest research in view of the unsolved problems of the prior art, combining a rice field dam mechanism with a water level adjuster installed in the paddle, and temporarily storing and discharging paddy water. To provide a water level adjustment device for paddy fields having a rice field dam mechanism that increases the amount of water stored in the rice fields to make the rice fields dams and to prevent water damage by controlling the amount of discharged water, and to provide a method for damming the rice fields. Objective.

  The means of the present invention according to claim 1 configured to solve the above-described problem is provided in a bag body in which a rear wall having a drainage hole and a pair of side walls are erected on a bottom plate in a substantially square shape in plan view. In a water level adjuster that adjusts the water level of a paddy field by installing a water level adjustment plate of variable height, a dam plate that is formed taller than the water level adjustment plate and has a water discharge hole that is smaller in diameter than the drainage hole on the lower side Is disposed between the rear wall of the main body and the water level adjusting plate, and the paddy water that overflows the water level adjusting plate is stored in the water level adjuster from the water discharge hole to the drain hole side little by little. Consists of something to be discharged.

  The rice field dam mechanism includes a dam plate provided with the water discharge holes on the lower side of the plate body, provided at both ends in the width direction of the dam plate, a front surface abutting on the water level adjusting plate, and a rear surface on the rear wall. It is good to comprise in a substantially H shape by planar view from a pair of support plate which contact | abuts.

  Further, the support plate can be inserted even when the distance between the rear wall of the bag main body and the water level adjusting plate is different by providing a contact elastic material on the front end surface and / or the rear end surface.

  Further, the means constituting the present invention according to claim 4 is a water level having a variable height in the main body in which a rear wall having a drainage hole and a pair of side walls are erected in a substantially square shape in plan view on the bottom plate. In the water level adjuster for adjusting the water level of the paddy field by installing an adjustment plate, a vertical groove is provided in the pair of side walls located between the rear wall and the water level adjustment plate, and the vertical groove is provided by the water level adjustment plate. The rice field water that overflows the water level adjustment plate is inserted into the water level adjuster by inserting a rice pad dam mechanism formed of a dam plate that is formed tall and has a water discharge hole smaller in diameter than the drainage hole on the lower side. It is made to discharge | emit little by little from the said water discharge hole to the said drain hole side, storing.

  The means constituting the present invention according to claim 5 includes: a water level adjusting plate having a variable height inserted in a main body having a drainage hole, and a water level adjuster configured to adjust the water level of a paddy field. A dam plate that is taller than the adjustment plate and has a water discharge hole that is smaller in diameter than the drainage hole is disposed behind the water level adjustment plate, and the drainage from the discharge hole is stored while storing paddy water that overflows the water level adjustment plate. It is because it was discharged little by little to the hole side.

Since the present invention is configured as described above, the following effects can be obtained.
(1) By providing a rice field dam mechanism in the water level adjuster installed in the paddy field, the paddy field has a dam function for storing rainwater, and the stored water is discharged little by little to prevent downstream flooding. The paddy field can be effectively used to prevent flood damage.
(2) By simply assembling the rice field dam mechanism to the existing water level adjuster, the rice field dam function can be easily and inexpensively provided for many years without any construction work.
(3) The rice field dam mechanism has a substantially H-shaped configuration in plan view from a dam plate provided with a water discharge hole and a pair of support plates provided at both ends in the width direction of the dam plate. The rice dam function can be given to the adjuster, and the production is inexpensive, and it can be easily assembled to the existing water level adjuster, so that the farmers can work on the dam without trouble.
In addition, the support plate can reliably support the dam plate even when the water pressure is received from the rear due to the reverse flow caused by the rise of the water level in the drainage groove.
(4) Since a rice field dam mechanism consisting of dam plates is assembled once in the water level adjuster, it can be made into a dam, so there is no need to operate while looking around, and it is possible to eliminate dangerous work during rain, such as a burden on busy farmers There are many advantages, such as reducing the risk and increasing the proportion of farmers who are reluctant to convert paddy fields into dams.
(5) The support plate of the rice field dam mechanism can also correspond to a water level adjuster in which the distance between the rear wall and the water level adjusting plate is different by providing a contact elastic material on the front end surface and / or the rear end surface.
(6) A dam plate that is located between the rear wall of the water level adjuster and the water level adjusting plate, provided with a vertical groove in the pair of side walls, taller than the water level adjusting plate in the vertical groove, and provided with a water discharge hole on the lower side The paddy field can be easily provided with the paddy dam function as needed.

1 to 4 relate to a first embodiment of the present invention, and FIG. 1 is a perspective view of a water level adjusting device for paddy fields. It is a perspective view of a rice field dam mechanism. It is a top view of the water level adjustment apparatus for paddy fields. It is IV-IV arrow direction sectional drawing in FIG. 5 and 6 relate to the second embodiment, and FIG. 5 is a perspective view of a rice field dam mechanism. It is a longitudinal cross-sectional view of the water level adjusting device for paddy fields. It is a perspective view of the rice field dam mechanism which concerns on 3rd Embodiment. It is a perspective view of the water level adjustment apparatus for paddy fields concerning a 4th embodiment.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. In the figure, 1 indicates a water level adjuster for paddy fields (hereinafter referred to as a water level adjuster 1). 2 is a concrete cocoon body that constitutes the water level adjuster 1, and the cocoon body 2 includes a bottom plate 2A, a pair of side walls 2B and 2B standing up at both ends in the width direction of the bottom plate 2A, and the pair of side walls 2B and 2B. The rear wall 2C is connected to both ends in the width direction and stands at the rear end of the bottom plate 2A, the drain hole 2D having a diameter of 150 mm provided in the rear wall 2C, and the inner surfaces of the pair of side walls 2B and 2B. The guide groove 2E is provided in the vertical direction, and the pressure receiving plate support groove 2F is provided on the upper surface of the bottom plate 2A corresponding to the position of the guide groove 2E.

Reference numeral 3 denotes a pressure receiving plate installed in a substantially lower half of the saddle body 2. The pressure receiving plate 3 has a shape in which a locking stopper 3B protrudes rearward from the upper end side of a plate main body 3A made of a flat plate. The guide grooves 2E and 2E are fitted, and the lower end is fitted into the pressure receiving plate support groove 2F.

Reference numeral 4 denotes a water level adjusting plate which is positioned above the pressure receiving plate 3 and is inserted into the main body 2. The water level adjusting plate 4 protrudes from a flat plate main body 4A, an engaging stopper 4B that contacts and separates from the locking stopper 3B, and protrudes forward from the upper end of the plate main body 4A. It is composed of an operating protrusion 4C provided, and is slidably fitted into the guide grooves 2E and 2E at both ends in the width direction, and moves up and down with the state where the engagement stopper 4B is in contact with the locking stopper 3B as an upper limit. Therefore, the water level is adjusted.
Thus, the water level adjuster 1 for paddy fields is composed of the main body 2, the pressure receiving plate 3 and the water level adjusting plate 4.

  Reference numeral 5 denotes an aluminum rice field dam mechanism disposed between the rear wall 2C of the water level adjuster 1 for paddy fields 1 having the above-described configuration and the water level adjusting plate 4. In other embodiments described later, the rice field dam mechanism is made of aluminum, so that it is not clearly shown. Reference numeral 6 denotes a dam plate constituting the rice field dam mechanism 5, and the dam plate 6 is a plate body 6A composed of a flat plate set at a height higher than the upper end 4D when the water level adjusting plate 4 is pulled up most, and the plate A water discharge hole 6B having a smaller diameter than the drain hole 2D of the rear wall 2C formed on the lower end side of the body 6A and a hole diameter of about 50 mm is formed.

  Reference numerals 7 and 7 denote a pair of supports provided so as to form a substantially H shape at both ends in the width direction of the dam plate 6. Each support body 7 has the same height as the dam plate 6 and is set to have a front-rear width that fits between the rear wall 2C and the water level adjustment plate 4, and a plate body 7A having the dam plate 6 connected substantially in the middle, Reinforcing plate bodies 7B and 7B fixed to the inner surface of the plate body 7A so as to sandwich the dam plate 6 are formed.

The paddy field water level adjusting device having the rice field dam mechanism 5 has the above-described configuration, and the operation thereof will be described next. A space is defined by the bottom plate 2A and the pair of side walls 2B and 2B, the pressure receiving plate 3, the water level adjusting plate 4 and the dam plate 6 of the main body 2 by the water level adjuster 1 and the rice field dam mechanism 5. Since the water discharge hole 6 </ b> B of the dam plate 6 has a smaller diameter than the drainage hole 2 </ b> D of the main body 2, the space functions as a storage tank 8 for paddy water that flows over the water level adjustment plate 4 and flows in.
When this is explained based on FIG. 4, the water level of the water level adjuster 1 when the water level adjusting plate 4 is pulled up most is A, but the paddy water that flows over the water level adjusting plate 4 and flows into the storage tank 8 is a dam plate. Since the upper end 6B of 6 is stored, the water level of the rice field becomes the height of B, and the amount of stored water in the rice field increases so that it can have a dam function.
And since the stored water is controlled to the original height of the water level adjusting plate 4 after the rain has stopped by discharging the paddy water little by little from the water discharge hole 6B, it is not necessary to operate the dam plate 6.

In addition, the space behind the dam plate 6 in the water level adjuster 1 functions as an overflow water treatment tank 9, and all the water that overflows the dam plate 6 due to heavy rainfall does not exceed the dredging in the water level adjuster 1. In order to drain water, the overflow water in the case where the water discharge hole 6B of the dam plate 6 cannot be discharged due to clogging with dust is treated.

  5 and 6 show a second embodiment. In the figure, 11 indicates a rice field dam mechanism. Reference numeral 12 denotes a dam plate constituting the rice field dam mechanism 11, and the dam plate 12 is formed of a plate main body 12A made of a flat plate and a water discharge hole 12B having a diameter of about 50 mm provided on the lower end side of the plate main body 12A. . Reference numerals 13 and 13 denote a pair of support plates provided at both ends in the width direction of the dam plate 12. Each support plate 13 is formed of a flat plate, and by providing a longitudinal groove 13A in which the dam plate 12 is fitted substantially in the middle in the width direction. The dam plate 12 and the pair of support plates 13, 13 are assembled in a substantially H shape in plan view.

  Reference numerals 14 and 14 denote a pair of front and rear abutting elastic members provided on the front end face 13B and the rear end face 13C of each support plate 13, respectively. Each of the abutting elastic members 14 is formed in a bow shape from a synthetic resin material having elasticity. The lower end side 14A is bonded to the front end surface 13B and the rear end surface 13C of the support plate 13, and the front end side 14B is set to a free end. By doing so, it can be flattened. By comprising in this way, the dam board 12 can be smoothly inserted in the water level regulator 15 for paddy fields.

This embodiment has the above-described configuration, and the rice dam function is the same as that of the first embodiment, but the interval between the rear wall 15A of the water level adjuster 15 and the water level adjustment plate 15B is wider than the dam plate 12. Also in the water level adjuster 15, the abutment dam mechanism 11 can be inserted with good stability by the contact elastic members 14, 14 coming into contact with the water level adjusting plate 15B and the rear wall surface 15A as shown in FIG.

The contact elastic member 14 may be provided on either the front end surface 13B or the rear end surface 13C of the support plate 13.

FIG. 7 shows a rice field dam mechanism 21 according to the third embodiment, which is characterized in that a dam plate 22 and a pair of support plates 23, 23 are integrally formed in a substantially H shape in a plan view, and a water discharge hole 22A is a mold. The reason is that it is formed in an inverted U shape with the lower part opened so that it can be removed.
According to the present embodiment, the rice field dam mechanism 21 can be manufactured easily and inexpensively.

  FIG. 8 shows a fourth embodiment. In the figure, reference numeral 31 denotes a water level adjuster, and the water level adjuster 31 has the same configuration as the water level adjuster 1 in the first embodiment, and is viewed in plan view from the bottom plate 32A, the pair of side walls 32B and 32B, and the rear wall 32C. The main body 32 is formed in a substantially square shape and has a drain hole 32D (not shown) in the rear wall 32C, and a pressure receiving plate 33 and a water level adjusting plate 34 inserted in the main body 32. In addition, a pair of longitudinal grooves 35 are provided approximately in the middle of the side wall 32B in the front-rear direction.

  Reference numeral 36 denotes a rice field dam mechanism provided in the water level adjuster 31, and the rice field dam mechanism 36 is constituted by a dam plate 37 fitted to the pair of longitudinal grooves 35, 35 at both ends in the width direction. A water discharge hole 37 </ b> A (not shown) is provided on the lower end side of the dam plate 37, and a space between the dam plate 37, the pressure receiving plate 33 and the water level adjusting plate 34 is a storage tank 38.

  The present embodiment has the above-described configuration, and the paddy water that has overflowed the water level adjusting plate 34 is stored in the storage tank 38 so that the water level of the rice field can be stored up to the upper end 37 </ b> B of the dam plate 37.

  In addition, in each said embodiment, although the hole diameter of the water discharge holes 6B, 12A, and 22B was set to about 50 mm, this invention is not limited to this figure, and the point is the drain hole 2D of the water level adjuster 1 in summary. It is sufficient if the water discharge amount of the water discharge holes 6B, 12A, and 22B is less than the amount of drainage so that the paddy water can be stored in the storage tank 8.

  The rice field dam mechanism 5 is made of aluminum, but may be made of, for example, a fiber reinforced synthetic resin material.

1, 31 Water level adjuster 2, 32 Saddle body 2A, 32A Bottom plate 2B, 32B Side wall 2C, 32C Rear wall 2D, 32D Drain hole 3, 33 Pressure receiving plate 4, 34 Water level adjust plate 5, 11, 21, 33 Rice field dam mechanism 6, 12, 22, 37 Dam plate 6B, 12B, 22B, 37A Water discharge hole 7, 13, 23 Support plate 14 Contact elastic material

The present invention relates to paddy field water provided with a paddy dam mechanism for the purpose of preventing paddy field dams by controlling the release of paddy water by providing paddy field water level regulators with paddy dam mechanisms. The present invention relates to a position adjusting device and a rice field damification method.

  Since paddy fields need to adjust the water level according to the growing season of rice, a water level adjuster (also called a water level adjusting paddy) is installed on the shore. There are various types of water level adjusters, but as an example, the water level adjuster is generally composed of a pressure receiving plate that receives earth pressure in the main body and a water level adjusting plate whose height position is regulated by pressure contact with the pressure receiving plate. (Patent Document 1).

Japanese Patent No. 4817159

By the way, in recent years, abnormal weather has become normal, and local heavy rains have occurred in various parts of the country. On the other hand, the loss of water capacity in the forests has caused problems such as sediment loss and frequent flood damage. Therefore, the technology aimed at preventing the occurrence of disasters caused by the rice field dam, which makes the water storage capacity of the paddy field function as a dam when it rains, and prevents the rain that falls on the paddy field from flowing down at once and causing flood damage and debris flow disasters. Is required.

  However, the conventional water level adjuster is intended to adjust the water level of the paddy field, and does not consider how to deal with a large amount of rain on the paddy field. It is discharged from the drainage hole of the main body, and when the discharge amount of the drainage hole cannot be handled, it is overflowing from the main body.

And even if the rice field has a water storage capacity and functions as a dam, the conventional water level regulator for paddy fields is not configured to store rainwater and release it little by little. For this reason, in the case of heavy rain, the current situation is that the water level adjustment plate can be raised to the maximum and raised, or a separate long plate can be installed in the water level adjustment device.
However, there is a problem that the work at the time of rain is dangerous and it is not effective because there are some people who are not cooperating with the dam and there are no people like part-time farmers because it is troublesome.
Therefore, a proposal has been made to make a paddy field into a dam. As an example, there is a method in which one side of a dam plate is bitten and one side is floated and drained from a triangular opening. However, since it is not the structure which stores paddy water temporarily and discharges little by little, there exists a problem that the setting of the discharge amount of water is troublesome.

  The present invention was made as a result of inventor's earnest research in view of the unsolved problems of the prior art, combining a rice field dam mechanism with a water level adjuster installed in the paddle, and temporarily storing and discharging paddy water. To provide a water level adjustment device for paddy fields having a rice field dam mechanism that increases the amount of water stored in the rice fields to make the rice fields dams and to prevent water damage by controlling the amount of discharged water, and to provide a method for damming the rice fields. Objective.

The means of the present invention according to claim 1 configured to solve the above-described problem is provided in a bag body in which a rear wall having a drainage hole and a pair of side walls are erected on a bottom plate in a substantially square shape in plan view. A water level adjuster that adjusts the water level of paddy fields by installing a water level adjuster plate with variable height, and is formed taller than the water level adjuster plate, and has a water discharge hole with a smaller diameter than the drainage hole on the lower side Rice field dam mechanism constructed in a substantially H shape in plan view from a plate and a pair of support plates provided at both ends in the width direction of the dam plate, the front surface abutting the water level adjusting plate and the rear surface abutting the rear wall The paddy water that overflows the water level adjusting plate is stored in the water level adjuster and is gradually discharged from the water discharge hole toward the drain hole.

And it is good for the said support plate to be able to be inserted also in the water level adjuster from which the space | interval of the said rear wall and a water level adjustment plate differs by providing a contact elastic material in a front surface and / or a rear surface .

According to a third aspect of the present invention, there is provided a water level adjuster in which a water level adjusting plate having a variable height is inserted in a main body having a drain hole to adjust the water level of a paddy field. A paddy dam mechanism constructed in a substantially H shape in plan view by providing a pair of support plates at both ends in the width direction to a dam plate that is taller than the adjustment plate and has a water discharge hole that is smaller in diameter than the drainage hole . It is arranged between the rear and the rear wall of the main body of the paddle so that the paddy water flowing over the water level adjusting plate is stored and discharged gradually from the water discharge hole to the drain hole side.

Since the present invention is configured as described above, the following effects can be obtained.
(1) By providing a rice field dam mechanism in the water level adjuster installed in the paddy field, the paddy field has a dam function for storing rainwater, and the stored water is discharged little by little to prevent downstream flooding. The paddy field can be effectively used to prevent flood damage.
(2) By simply assembling the rice field dam mechanism to the existing water level adjuster, the rice field dam function can be easily and inexpensively provided for many years without any construction work.
(3) The rice field dam mechanism has a substantially H-shaped configuration in plan view from a dam plate provided with a water discharge hole and a pair of support plates provided at both ends in the width direction of the dam plate. The rice dam function can be given to the adjuster, and the production is inexpensive, and it can be easily assembled to the existing water level adjuster, so that the farmers can work on the dam without trouble.
In addition, the support plate can reliably support the dam plate even when the water pressure is received from the rear due to the reverse flow caused by the rise of the water level in the drainage groove.
(4) Since a rice field dam mechanism consisting of dam plates is assembled once in the water level adjuster, it can be made into a dam, so there is no need to operate while looking around, and it is possible to eliminate dangerous work during rain, such as a burden on busy farmers There are many advantages, such as reducing the risk and increasing the proportion of farmers who are reluctant to convert paddy fields into dams.
(5) The support plate of the rice field dam mechanism can also correspond to a water level adjuster in which the distance between the rear wall and the water level adjustment plate is different by providing a contact elastic material on the front surface and / or the rear surface .

1 to 4 relate to a first embodiment of the present invention, and FIG. 1 is a perspective view of a water level adjusting device for paddy fields. It is a perspective view of a rice field dam mechanism. It is a top view of the water level adjustment apparatus for paddy fields. It is IV-IV arrow direction sectional drawing in FIG. 5 and 6 relate to the second embodiment, and FIG. 5 is a perspective view of a rice field dam mechanism. It is a longitudinal cross-sectional view of the water level adjusting device for paddy fields. It is a perspective view of the rice field dam mechanism which concerns on 3rd Embodiment. It is a perspective view of the water level adjustment apparatus for paddy fields concerning a 4th embodiment.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. In the figure, 1 indicates a water level adjuster for paddy fields (hereinafter referred to as a water level adjuster 1). 2 is a concrete cocoon body that constitutes the water level adjuster 1, and the cocoon body 2 includes a bottom plate 2A, a pair of side walls 2B and 2B standing up at both ends in the width direction of the bottom plate 2A, and the pair of side walls 2B and 2B. The rear wall 2C is connected to both ends in the width direction and stands at the rear end of the bottom plate 2A, the drain hole 2D having a diameter of 150 mm provided in the rear wall 2C, and the inner surfaces of the pair of side walls 2B and 2B. The guide groove 2E is provided in the vertical direction, and the pressure receiving plate support groove 2F is provided on the upper surface of the bottom plate 2A corresponding to the position of the guide groove 2E.

Reference numeral 3 denotes a pressure receiving plate installed in a substantially lower half of the saddle body 2. The pressure receiving plate 3 has a shape in which a locking stopper 3B protrudes rearward from the upper end side of a plate main body 3A made of a flat plate. The guide grooves 2E and 2E are fitted, and the lower end is fitted into the pressure receiving plate support groove 2F.

Reference numeral 4 denotes a water level adjusting plate which is positioned above the pressure receiving plate 3 and is inserted into the main body 2. The water level adjusting plate 4 protrudes from a flat plate main body 4A, an engaging stopper 4B that contacts and separates from the locking stopper 3B, and protrudes forward from the upper end of the plate main body 4A. It is composed of an operating protrusion 4C provided, and is slidably fitted into the guide grooves 2E and 2E at both ends in the width direction, and moves up and down with the state where the engagement stopper 4B is in contact with the locking stopper 3B as an upper limit. Therefore, the water level is adjusted.
Thus, the water level adjuster 1 for paddy fields is composed of the main body 2, the pressure receiving plate 3 and the water level adjusting plate 4.

  Reference numeral 5 denotes an aluminum rice field dam mechanism disposed between the rear wall 2C of the water level adjuster 1 for paddy fields 1 having the above-described configuration and the water level adjusting plate 4. In other embodiments described later, the rice field dam mechanism is made of aluminum, so that it is not clearly shown. Reference numeral 6 denotes a dam plate constituting the rice field dam mechanism 5, and the dam plate 6 is a plate body 6A composed of a flat plate set at a height higher than the upper end 4D when the water level adjusting plate 4 is pulled up most, and the plate A water discharge hole 6B having a smaller diameter than the drain hole 2D of the rear wall 2C formed on the lower end side of the body 6A and a hole diameter of about 50 mm is formed.

Reference numerals 7 and 7 denote a pair of supports provided so as to form a substantially H shape at both ends in the width direction of the dam plate 6. Each support body 7 has the same height as the dam plate 6 and is set to have a front-rear width that fits between the rear wall 2C and the water level adjustment plate 4, and a plate body 7A having the dam plate 6 connected substantially in the middle, Reinforcing plate bodies 7B and 7B fixed to the inner surface of the plate body 7A so as to sandwich the dam plate 6 are formed. The support plate 7 has a front surface 7C in contact with the water level adjustment plate 4 and a rear surface 7D in contact with the rear plate 2 of the water level adjuster 1.

The paddy field water level adjusting device having the rice field dam mechanism 5 has the above-described configuration, and the operation thereof will be described next. A space is defined by the bottom plate 2A and the pair of side walls 2B and 2B, the pressure receiving plate 3, the water level adjusting plate 4 and the dam plate 6 of the main body 2 by the water level adjuster 1 and the rice field dam mechanism 5. Since the water discharge hole 6 </ b> B of the dam plate 6 has a smaller diameter than the drainage hole 2 </ b> D of the main body 2, the space functions as a storage tank 8 for paddy water that flows over the water level adjustment plate 4 and flows in.
When this is explained based on FIG. 4, the water level of the water level adjuster 1 when the water level adjusting plate 4 is pulled up most is A, but the paddy water that flows over the water level adjusting plate 4 and flows into the storage tank 8 is a dam plate. Since the upper end 6B of 6 is stored, the water level of the rice field becomes the height of B, and the amount of stored water in the rice field increases so that it can have a dam function.
And since the stored water is controlled to the original height of the water level adjusting plate 4 after the rain has stopped by discharging the paddy water little by little from the water discharge hole 6B, it is not necessary to operate the dam plate 6.

In addition, the space behind the dam plate 6 in the water level adjuster 1 functions as an overflow water treatment tank 9, and all the water that overflows the dam plate 6 due to heavy rainfall does not exceed the dredging in the water level adjuster 1. In order to drain water, the overflow water in the case where the water discharge hole 6B of the dam plate 6 cannot be discharged due to clogging with dust is treated.

  5 and 6 show a second embodiment. In the figure, 11 indicates a rice field dam mechanism. Reference numeral 12 denotes a dam plate constituting the rice field dam mechanism 11, and the dam plate 12 is formed of a plate main body 12A made of a flat plate and a water discharge hole 12B having a diameter of about 50 mm provided on the lower end side of the plate main body 12A. . Reference numerals 13 and 13 denote a pair of support plates provided at both ends in the width direction of the dam plate 12. Each support plate 13 is formed of a flat plate, and by providing a longitudinal groove 13A in which the dam plate 12 is fitted substantially in the middle in the width direction. The dam plate 12 and the pair of support plates 13, 13 are assembled in a substantially H shape in plan view.

14 and 14 show a pair of contact elastic member before and provided on the front surface 13B and the rear surface 13C of the support plates 13. Each of the contact elastic members 14 is formed into a bow shape from a synthetic resin material having elasticity, and the lower end side 14A is bonded to the front surface 13B and the rear surface 13C of the support plate 13 so that the front end side 14B is a free end. Can be flattened. By comprising in this way, the dam board 12 can be smoothly inserted in the water level regulator 15 for paddy fields.

This embodiment has the above-described configuration, and the rice dam function is the same as that of the first embodiment, but the interval between the rear wall 15A of the water level adjuster 15 and the water level adjustment plate 15B is wider than the dam plate 12. Also in the water level adjuster 15, the abutment dam mechanism 11 can be inserted with good stability by the contact elastic members 14, 14 coming into contact with the water level adjusting plate 15B and the rear wall surface 15A as shown in FIG.

The contact elastic member 14 may be provided on either the front surface 13B or the rear surface 13C of the support plate 13.

FIG. 7 shows a rice field dam mechanism 21 according to the third embodiment, which is characterized in that a dam plate 22 and a pair of support plates 23, 23 are integrally formed in a substantially H shape in a plan view, and a water discharge hole 22A is a mold. The reason is that it is formed in an inverted U shape with the lower part opened so that it can be removed.
According to the present embodiment, the rice field dam mechanism 21 can be manufactured easily and inexpensively.

  FIG. 8 shows a fourth embodiment. In the figure, reference numeral 31 denotes a water level adjuster, and the water level adjuster 31 has the same configuration as the water level adjuster 1 in the first embodiment, and is viewed in plan view from the bottom plate 32A, the pair of side walls 32B and 32B, and the rear wall 32C. The main body 32 is formed in a substantially square shape and has a drain hole 32D (not shown) in the rear wall 32C, and a pressure receiving plate 33 and a water level adjusting plate 34 inserted in the main body 32. In addition, a pair of longitudinal grooves 35 are provided approximately in the middle of the side wall 32B in the front-rear direction.

  Reference numeral 36 denotes a rice field dam mechanism provided in the water level adjuster 31, and the rice field dam mechanism 36 is constituted by a dam plate 37 fitted to the pair of longitudinal grooves 35, 35 at both ends in the width direction. A water discharge hole 37 </ b> A (not shown) is provided on the lower end side of the dam plate 37, and a space between the dam plate 37, the pressure receiving plate 33 and the water level adjusting plate 34 is a storage tank 38.

  The present embodiment has the above-described configuration, and the paddy water that has overflowed the water level adjusting plate 34 is stored in the storage tank 38 so that the water level of the rice field can be stored up to the upper end 37 </ b> B of the dam plate 37.

  In addition, in each said embodiment, although the hole diameter of the water discharge holes 6B, 12A, and 22B was set to about 50 mm, this invention is not limited to this figure, and the point is the drain hole 2D of the water level adjuster 1 in summary. It is sufficient if the water discharge amount of the water discharge holes 6B, 12A, and 22B is less than the amount of drainage so that the paddy water can be stored in the storage tank 8.

  The rice field dam mechanism 5 is made of aluminum, but may be made of, for example, a fiber reinforced synthetic resin material.

1, 31 Water level adjuster 2, 32 Saddle body 2A, 32A Bottom plate 2B, 32B Side wall 2C, 32C Rear wall 2D, 32D Drain hole 3, 33 Pressure receiving plate 4, 34 Water level adjust plate 5, 11, 21, 33 Rice field dam mechanism 6, 12, 22, 37 Dam plate 6B, 12B, 22B, 37A Water discharge hole 7, 13, 23 Support plate
7C, 13B front
7D, 13C rear surface 14 Contact elastic material

According to a third aspect of the present invention, there is provided a water level adjuster in which a water level adjusting plate having a variable height is inserted in a main body having a drain hole to adjust the water level of a paddy field. A rice field dam mechanism constructed in a substantially H shape in plan view by providing a pair of support plates at both ends in the width direction to a dam plate that is taller than the adjustment plate and has a water discharge hole that is smaller in diameter than the drainage hole . The front surface is in contact with the water level adjusting plate and the rear surface is in contact with the rear wall of the paddle body, and the paddy water that overflows the water level adjusting plate is stored from the water discharge hole to the drain hole side. Consists of draining little by little.

Claims (5)

  A water level adjuster that adjusts the water level of a paddy field by installing a water level adjusting plate with a variable height in the main body of the paddle, which has a rear wall having a drainage hole and a pair of side walls standing upright in a plan view on the bottom plate. A dam plate that is formed taller than the water level adjustment plate and has a water discharge hole having a smaller diameter than the drainage hole on the lower side is disposed between the rear wall of the main body and the water level adjustment plate. A paddy field water level adjusting device provided with a rice field dam mechanism that gradually discharges the paddy water flowing over the adjusting plate from the water discharge hole to the drain hole side while storing the paddy water in the water level adjuster.   The rice field dam mechanism includes a dam plate provided with the water discharge hole on the lower side of the plate body, and provided at both ends in the width direction of the dam plate, the front surface is in contact with the water level adjusting plate, and the rear surface is in contact with the rear wall. The water level adjusting device for paddy fields provided with the rice field dam mechanism according to claim 1, wherein the paddy dam mechanism is provided in a plan view from a pair of support plates.   The support plate can be inserted into a water level adjuster having a different distance between the rear wall and the water level adjusting plate by providing a contact elastic material on the front end surface and / or the rear end surface. A water level adjusting device for paddy fields, comprising the rice field dam mechanism described in 2.   A water level adjuster that adjusts the water level of a paddy field by installing a water level adjusting plate with a variable height in the main body of the paddle, which has a rear wall having a drainage hole and a pair of side walls standing upright in a plan view on the bottom plate. A vertical groove is provided in the pair of side walls located between the rear wall and the water level adjusting plate, the vertical groove is formed taller than the water level adjusting plate, and the lower side has a smaller diameter than the drainage hole. By inserting a paddy dam mechanism consisting of a dam plate provided with a water discharge hole, paddy water overflowing the water level adjustment plate is stored in the water level adjuster and gradually from the water discharge hole to the drain hole side. Paddy field water level adjustment device with a rice field dam mechanism that is designed to discharge. A water level adjustment plate with a variable height is inserted in the main body of the pit having a drain hole, and the water level adjuster is designed to adjust the water level of the paddy field. A dam plate provided with a hole at the rear of the water level adjusting plate, and storing the paddy water that overflows the water level adjusting plate, and discharging it gradually from the water discharge hole to the drain hole side. Chemical method.

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