JP2020191786A - Water level adjustment device for paddy field and water level adjustment method of paddy field - Google Patents

Abstract

To provide a water level adjustment device for paddy field and a water level adjustment method of a paddy field capable of using a cutoff packing and a spring instead of a soil pressure, for reducing a load in a water level adjusting work and improving efficiency, and coping with automatization of a water level adjusting.SOLUTION: A basin main body 2 comprises: a bottom plate 2A, side wall plates 2B, 2B; and a rear wall plate 2C comprising a drainage hole. An inner face of each side wall plate 2B has a guide groove 2E in a vertical direction. The pair of guide grooves 2E comprise: a cutoff plate 3 having on an upper end side, an engagement part; and a water level adjusting plate 4 which has on a lower end side, an engaging part engaging to the engagement part, and has on an upper end side, a water level adjusting hole 4C, the water level adjusting plate being inserted and fitted in a manner of capable of being lifted up and down. In the invention, a cutoff packing fastened to an end face in a lateral width direction of the cutoff plate 3 fills a gap between the same and the guide grooves 2E, for inhibiting entry of foreign matters such as water and mud into the basin main body 2. By spring force of a plate spring provided on the cutoff plate 3 so as to face a groove face of the guide groove 2E, the cutoff plate 3 pressure contacts to the water level adjusting plate 4 for positioning the water level adjusting plate.SELECTED DRAWING: Figure 1

Description

The present invention uses a water stop packing and a spring to set the height position of the water level adjustment plate, so that even elderly people can easily perform water level adjustment work and can support remote control and automation. Regarding the device and the water level adjustment method of the paddy field.

Paddy fields are equipped with water level adjustment devices on the shores of paddy fields in order to control the temperature of water by adjusting the water level according to the growing season of rice and to release a large amount of water during heavy rains. There are various types of water level adjustment devices, but as an example, a pressure receiving plate that receives earth pressure inside the basin body and a water level adjustment that is provided on the basin body so that it can be raised and lowered and the height position is regulated by pressure contact between the pressure receiving plates. There is a water level adjusting device roughly composed of a plate (Patent Document 1).

No. 4817159 Patent Gazette

By the way, since the number of agricultural workers is aging and the working population is decreasing year by year, it is required to reduce the physical burden on the water level management work of paddy fields and to improve the work efficiency. However, in the conventional water level adjusting device, the pressure receiving plate that presses against the water level adjusting plate to position its height is pressurized with viscous soil containing water (hereinafter referred to as soil) and prevents water leakage. Therefore, when changing the height of the water level adjustment plate, it is necessary to remove the soil in front of the pressure receiving plate to reduce the pressing force of the pressure receiving plate on the water level adjusting plate. After that, it was necessary to backfill the soil to prevent water leakage.

The conventional method of applying earth pressure to the pressure receiving plate described above has the weight of soil containing water and stickiness, and the stickiness varies depending on the water content, so the earth pressure required for ascending / descending movement is not constant. Therefore, there is a problem that the vertical adjustment of the water level adjusting plate cannot be performed smoothly. Moreover, since the adjustment work is done in paddy fields and ridges and the scaffolding is poor, the work of removing and backfilling the soil requires a large physical burden and time, and it is necessary to perform the water level adjustment work for each paddy field. Work efficiency is required.

In recent years, mechanization of a water level adjustment device that enables remote operation or automation of water level adjustment has been studied, and a prototype has been proposed. However, rice straw and rice mixed in paddy water in the elevating mechanism of the water level adjustment plate There is also a problem that miscellaneous substances such as stems and roots are entangled and cause malfunction.

The present invention has been made in view of the above-mentioned problems of the prior art, and by using waterproof packing and a spring instead of earth pressure, the burden of water level adjustment work can be reduced and efficiency can be reduced without using a large force. It is an object of the present invention to provide a water level adjusting device for paddy fields and a water level adjusting method for paddy fields, which can be used for remote control and automation of water level adjustment.

(1) The means of the present invention according to claim 1 configured to solve the above-mentioned problems uses a rear wall plate provided with a drain hole and a pair of side wall plates having a vertical guide groove formed on the inner surface as a bottom plate. A water stop plate that has a box body that is erected in a substantially square shape in a plan view, has a locking portion on the upper end side, and is vertically inserted into the guide grooves of the pair of side wall plates, and on the lower end side. A water level adjusting plate that has an engaging portion that engages with the locking portion of the water blocking plate and has a water level adjusting port on the upper side, and is vertically inserted into the guide groove, and the water stopping plate. Water-stopping packing that is fixed to both end faces in the width direction or the groove surfaces of the guide grooves to prevent water, mud, and other foreign substances from flowing into the box body while ensuring the up-and-down movement of the water-stop plate. It is composed of an elastic pressing body that is arranged between the water stop plate and the groove surface of the guide groove and presses the water stop plate against the water level adjusting plate.
(2) Then, the water level adjusting plate may be provided with vertical ribs for preventing lateral vibration that slide on each side wall surface of the box body on the back surface.
(3) Further, the water stop packing fixed to the water stop plate may have a shape that also covers both end faces in the width direction of the water level adjusting plate.
(4) Further, it is preferable that the waterproof packing is a pile-shaped material in which micropores are formed by entwining innumerable elastic short fibers and fixed to the upper surface of the tape.
(5) The waterproof packing may be made of elastic rubber, urethane or silicon.
(6) The water level adjusting plate may be provided with an elevating operating body at the center of the upper end above the water level adjusting port.
(7) Further, in the configuration of the present invention according to claim 7, a rear wall plate having a drain hole and a pair of side wall plates having a vertical guide groove formed on the inner surface stand on the bottom plate in a substantially square shape in a plan view. A water stop plate having a locking portion on the upper end side is inserted into the guide groove so as to be able to move up and down, and a water stop plate having a locking portion on the upper end side is provided in the provided box body so as to engage with the locking portion of the water stop plate on the lower end side. Using a paddy field water level adjusting device configured by inserting a water level adjusting plate having a joint portion and a water level adjusting port on the upper side into the guide groove so as to be able to move up and down, both end faces in the width direction of the water stop plate or the said The water stop packing fixed to the groove surface of the guide groove prevents water, mud and other foreign matter from entering the box body while ensuring the elevating movement of the water stop plate, and the water stop plate and the guide groove. The water stop plate is brought into pressure contact with the water level adjusting plate by an elastic pressing body arranged between the groove surface and the water level adjusting plate.
(8) Then, the water stop packing may have a shape that covers both end faces in the width direction of the water level adjusting plate while being provided on the water stop plate.
(9) The waterproof packing is preferably a pile-shaped material in which micropores are formed by entwining innumerable elastic short fibers and fixed to the upper surface of the tape.
(10) Further, the waterproof packing may be made of rubber, urethane or silicon which is an elastic body.

Since the present invention is configured as described above, it exhibits the following effects.
(1) Since the height position of the water level adjustment plate is adjusted by using a waterproof packing and an elastic pressing body instead of the conventional earth pressure, the soil removal and backfilling work that was conventionally performed when adjusting the water level is unnecessary. Therefore, the burden of adjustment work can be reduced and work efficiency can be improved.
(2) On the back surface of the water level adjusting plate, a pair of left and right vertical ribs for preventing lateral vibration, which are located on both ends in the width direction and slide with the side wall plates of the basin body, are provided, and the water level adjusting plate receives external force such as water pressure. However, since it is prevented from tilting significantly, the water level adjusting plate can move up and down smoothly, and it is possible to meet the demand for automation.
(3) Since the water stop packing that adheres to the water stop plate covers not only the end face of the water stop plate but also the end face of the water level adjustment plate in the width direction, the water stop plate, the water level adjustment plate, and the guide groove of the basin body It is possible to effectively prevent water from entering between the spaces.
(4) Since a locking portion is provided on the upper end side of the water level adjusting plate and an engaging portion is provided on the lower end side of the water level adjusting plate to engage with each other, the water stopping plate is integrated by simply pulling up the water level adjusting plate. Since it can be pulled up to the maximum, the work of grooving drainage can be performed efficiently.
(5) The water-stop packing provided between the water-stop plate and the guide groove of the box body is a pile-like one in which micropores are formed by entwining innumerable elastic short fibers. It is possible to prevent the paddy water from flowing out to the main body of the basin due to the clogging of the particles.
(6) Since the soil particles clogged in the micropores of the waterproof packing do not bond with each other and solidify, the waterproof packing does not impair the elasticity and the waterproof plate can move up and down. ..
(7) By disposing an elastic pressing body between both ends of the water stop plate in the width direction and the groove surface of each guide groove, the water stop plate is pressed evenly on the left and right sides of the water level adjusting plate. It is possible to prevent the water level adjusting plate from descending due to its own weight, and it is possible to prevent water leakage from the guide groove because the water stop plate is not tilted.
(8) Since the elevating operation body is provided in the center of the upper end of the water level adjusting plate, miscellaneous substances such as rice straw, rice stalks, and roots mixed in the paddy water do not get entangled with the elevating operation body. The water level can be adjusted smoothly, and the work of removing miscellaneous substances can be almost eliminated.

FIG. 1 is an overall perspective view of a paddy field water level adjusting device according to an embodiment of the present invention. It is a vertical sectional view of a water level adjustment device. It is a rear perspective view of a water level adjustment plate. It is a partial front perspective view of the state where the water stop plate and the water level adjustment plate are inserted. It is a partial rear perspective view of the state where the water stop plate and the water level adjustment plate are inserted. It is a partially enlarged view of the state where the water stop plate and the water level adjustment plate are inserted in the guide groove of the basin body. It is a partial cross-sectional view of the water stop packing fixed to the water stop plate. It is explanatory drawing of the state in which the water level adjustment plate is lowered to the maximum. It is explanatory drawing of the state in which the water stop plate and the water level adjustment plate are pulled up to the maximum.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the figure, reference numeral 1 denotes a paddy field water level adjusting device (hereinafter, referred to as a water level adjusting device 1), which is composed of concrete, synthetic resin, or a composite thereof. Reference numeral 2 denotes a basin body constituting the water level adjusting device 1. The basin body 2 is formed on a bottom plate 2A, a pair of side wall plates 2B and 2B standing at both ends of the bottom plate 2A in the width direction, and a pair of side wall plates 2B and 2B. A rear wall plate 2C that connects both ends in the width direction and stands up at the rear end of the bottom plate 2A, a drainage hole 2D having a diameter of 150 mm provided in the rear wall plate 2C, and facing the inner surfaces of the pair of side wall plates 2B and 2B. It is composed of a guide groove 2E provided in the vertical direction and a receiving groove 2F provided on the upper surface of the bottom plate 2A continuously at the lower end of the guide groove 2E. Recessions 2G and 2G are formed on the outer surfaces of the wall plates 2B and 2B on both sides to prevent mice and pests from invading the paddy field from the shore.

Reference numeral 3 denotes a water stop plate arranged in the substantially lower half of the box main body 2. The water stop plate 3 is a plate main body 3A made of a flat plate and a locking protrusion 3B projecting rearward toward the upper end side of the plate main body 3A. And a groove fitting portion 3C projecting rearward from the lower end of the plate body 3A. The water stop plate 3 is fitted into the guide grooves 2E and 2E on both ends in the width direction, and is assembled to the basin body 2 in a state where the groove fitting portion 3C is fitted into the receiving groove 2F and the guide groove 2E. Guided by 2E, it can be raised and lowered.

Reference numeral 4 denotes a water level adjusting plate which is located above the water stop plate 3 and is vertically inserted into the basin body 2. The water level adjusting plate 4 has a plate body 4A made of a flat plate, an engaging protrusion 4B that projects forward toward the lower end side of the plate body 4A and engages with and disengages from the locking protrusion 3B, and an upper portion of the plate body 4A. A square water level adjustment port 4C with an opening formed on the side, a pair of left and right vertical ribs 4D and 4D for preventing lateral vibration provided on the back surface of the plate body 4A at both ends in the width direction, and up and down on the back surface of the plate body 4A. It is composed of a pair of reinforcing ribs 4E and 4E which are horizontally provided apart from each other.
The water level adjusting plate 4 having the above configuration is assembled to the basin body 2 by inserting both ends in the width direction into the guide grooves 2E and 2E so as to be able to move up and down, and the pair of left and right vertical ribs 4D and 4D are shown in FIG. As shown, by sliding on the inner surface of the side wall plate 2B of the box body 2, it is prevented from being greatly tilted.

In this way, the water level adjusting plate 4 is provided with a pair of left and right vertical ribs 4D and 4D for preventing lateral vibration on the back surface so as to prevent the water level adjusting plate 4 from sliding on the side wall plate 2B of the basin body 2 and being greatly tilted even if it is slightly tilted. Therefore, since the water level adjusting plate 4 can move up and down smoothly, manual operation is easy, and it is possible to respond to a request for automation.
Further, the water level adjusting plate 4 is provided with reinforcing ribs 4E and 4E separated from each other at the top and bottom to prevent the water level adjusting plate 4 from bending in a curved shape in a plan view due to water pressure. The lateral width direction end surface 4F of 4 is prevented from floating from the guide groove 2E to increase the gap.

Thus, the water level adjusting device 1 is composed of a basin body 2, a water stop plate 3 inserted into the basin body 2, and a water level adjusting plate 4, and the engaging protrusion 4B of the water level adjusting plate 4 is a water stopping plate 3. By engaging with the locking protrusion 3B, the water stop plate 3 can be pulled up integrally. As a result, the grooving drainage work described later can be efficiently performed.

Reference numeral 5 denotes a water stop packing fixed to the left and right end surfaces 3C of the water stop plate 3 in the lateral width direction. The waterproof packing 5 is a tape-shaped base formed by entwining innumerable elastic short fibers made of synthetic resin to form a pile-shaped main body 5A having innumerable micropores, which is wider than the thickness of the waterproof plate 3. It consists of one fixed to cloth 5B.
The water stop packing 5 is fixed to the left and right end surfaces 3C and 3C of the water stop plate 3 in the lateral width direction, and has a wide size that covers or sandwiches the left and right end surfaces 4D and 4D of the water level adjustment plate 4. It is formed in a shape. As a result, the water level adjusting plate 4 is not hindered from moving up and down by the water stop packing 5, and the wide water stop packing 5 prevents paddy water from entering the guide groove 2E as much as possible. It is done like this.

The water-stopping packing 5 having such a configuration closes the gap between the guide groove 2E and the end surface 3C of the water-stopping plate 3, but the fine holes are clogged with soil particles, so that the paddy water is inside the basin body 2. The water stop plate 3 moves up and down with respect to the guide groove 2 because the inflow to the water can be suppressed and the elasticity is not impaired because the soil particles are not bonded to each other and solidified due to the presence of short fibers. be able to.
Moreover, the soil particles clogged in the fine pores of the waterproof packing 5 are removed as if they were washed with water during heavy rain or a large amount of discharge, so that the waterproof packing 5 does not become a solidified state.

In the present invention, rubber, urethane, or silicon, which is an elastic body, may be used as the waterproof packing.

Reference numerals 6 and 6 indicate a pair of left and right leaf springs as elastic pressing bodies provided at both ends in the width direction of the surface of the water stop plate 3 and located near the upper end in the height direction. As shown in FIG. 4, each leaf spring 6 has a shape formed in an arc shape so that the water stop plate 3 can move up and down smoothly, and the upper end side 6A is fastened to the water stop plate 3 with a screw. However, the lower end 6B is set to a free end so that the elasticity of the leaf spring 6 is not impaired.
Then, in the prior art, it is practically impossible to evenly backfill the soil to the left and right by applying the pressing force evenly to the left and right by the earth pressure on the pressure receiving plate, so the water level adjusting plate is pulled up. At that time, a water leak phenomenon occurred between the pressure receiving plate and the main body of the box due to the imbalance between the left and right sides.
However, in the present embodiment, the pair of leaf springs 6 and 6 arranged at equal positions on the left and right have the same spring force, and the water stop plate 3 can be pressed uniformly on the water level adjusting plate 4 on the left and right. , The above-mentioned water leakage phenomenon can be suppressed as much as possible.

In addition to the screwing method, the leaf spring 6 is fastened by forming an insertion groove in the water stop plate 3 and inserting the upper end side of the leaf spring 6, and a dowel formed in the water stop plate 3. There is an appropriate method such as a method of fitting the hole of the leaf spring 6 into the hole.

Reference numeral 7 denotes a lifting screw rod erected at the center of the upper end of the water level adjusting plate 4 via a square bracket 7A. The elevating screw rod 7 constitutes an automation device, and enables automation of height adjustment of the water level adjusting plate 4 by engaging with a worm gear driven by an electric motor, for example. In addition, instead of the screw rod, a rack may be erected, and a pinion driven by an electric motor may be meshed to form an automated device that moves up and down.
Further, the lifting screw rod 7 can also be used for a drive device operated by remote control.

The present embodiment has the above-described configuration, and its operation will be described next. In adjusting the water level of a paddy field, the water stop plate 3 is usually positioned below the basin body 2 to store water in the paddy field. Then, when the amount of water stored in the paddy field is increased or decreased, the water level adjusting plate 4 is raised and lowered to adjust the water level.

In this water level adjustment work, the soil that has conventionally pressed the pressure receiving plate has different earth pressure depending on the viscosity and compaction state, so a large force is required for the soil removal work and the raising and lowering movement of the water level adjustment plate. did. However, in the present embodiment, the water stop plate 3 is supported by the basin main body 2 by the water stop packing 5, and the water stop plate 3 is pressed evenly to the left and right by the leaf spring 6 to the water level adjusting plate 4. It is possible to perform water level adjustment work without applying a large force while suppressing the water leakage phenomenon, and it is possible to reduce the physical burden on the operator.

Since such a large force is not required, the water level adjusting plate 4 can be raised and lowered by, for example, an electric motor, and an operation mechanism corresponding to remote control and automation can be provided.

Further, since the lifting screw rod 7 is provided at the center of the upper end of the water level adjusting plate 4 above the water level adjusting port 4C, miscellaneous substances such as rice straw, rice stalks, and roots mixed in the paddy field water can be moved to the lifting operation body. Since it does not get entangled, the water level can be smoothly adjusted manually or automatically, and the work of removing miscellaneous substances can be almost unnecessary.

Further, the locking protrusion 3B of the water stop plate 3 is configured to engage with the engagement protrusion 4B of the water level adjustment plate 4, and by pulling up the water level adjustment plate 4, the water stop plate 3 is pulled up integrally at the same time. It is possible to do so (see FIG. 9). Therefore, at the time of grooving drainage, a groove with a width and depth of about 15 cm is dug at the bottom of the paddy field, and the paddy water is collected up to the main body 2 and a large amount of water is drained at once. By pulling up the water level adjusting plate 4 as much as possible to open the drainage channel widely, it is possible to efficiently drain the water by securing a water channel that directly communicates with the drainage hole 2D.

Further, since the paddy field water can flow out from the water level adjusting port 4C even when the water level adjusting plate 4 is lowered to the maximum, the water level adjusting port 4C also has a water level adjusting function.

In the present embodiment, the water stop packing 5 is fixed to the end surface 3C of the water stop plate 3, but it may be fixed to the groove surface of each guide groove 2E.

1 Water level adjustment device for paddy fields 2 Masu body 2A Bottom plate 2B Side wall plate 2C Rear wall plate 2D Drain hole 2E Guide groove 3 Water stop plate 3C End surface 4 Water level adjustment plate 4C Water level adjustment port 4D Vertical rib 5 Water stop packing 6 Leaf spring (elasticity) Pressing body)
7 Lifting screw rod (lifting operation body)

Claims (10)

A rear wall plate with drainage holes and a pair of side wall plates with vertical guide grooves formed on the inner surface are erected on the bottom plate in a substantially square shape in a plan view, and a locking portion is provided on the upper end side. It has a water stop plate that is vertically inserted into the guide grooves of the pair of side wall plates, and an engaging portion that engages with the locking portion of the water stop plate on the lower end side, and water level adjustment on the upper side. The water level adjusting plate is configured to have a mouth and is vertically inserted into the guide groove, and is fixed to both end faces in the width direction of the water stop plate or the groove surfaces of the guide grooves to move the water stop plate up and down. The water stop packing is arranged between the water stop plate and the groove surface of the guide groove to prevent water, mud and other foreign substances from flowing into the box body while ensuring the water stop plate. A water level adjusting device for paddy fields, which comprises an elastic pressing body that is pressed against the water level adjusting plate. The paddy field water level adjusting device according to claim 1, wherein the water level adjusting plate is provided with vertical ribs for preventing lateral vibration that slide on each side wall plate of the box body on the back surface. The paddy field water level adjusting device according to claim 1, wherein the water blocking packing fixed to the water stopping plate has a shape that also covers both end faces in the width direction of the water level adjusting plate. The water level adjusting device for paddy fields according to claim 1, wherein the water-stop packing is a pile-shaped material in which micropores are formed by entwining innumerable elastic short fibers and is fixed to the upper surface of the tape. The paddy field water level adjusting device according to claim 1, wherein the waterproof packing is rubber, sponge, or silicon which is an elastic body. The paddy field water level adjusting device according to claim 1, wherein the water level adjusting plate is provided with an elevating operating body at the center of the upper end above the water level adjusting port. A rear wall plate having a drain hole and a pair of side wall plates having a vertical guide groove formed on the inner surface are erected on the bottom plate in a substantially square shape in a plan view, and a locking portion is provided on the upper end side. A water level adjustment is provided by inserting a water stop plate into the guide groove so as to be able to move up and down, having an engaging portion that engages with the locking portion of the water stop plate on the lower end side, and having a water level adjustment port on the upper side. The water stoppage is caused by a water stop packing fixed to both end faces in the width direction of the water stop plate or the groove surface of the guide groove by using a water level adjusting device for paddy fields configured by inserting the plate into the guide groove so as to be able to move up and down. While ensuring the vertical movement of the plate, it prevents water, mud and other foreign substances from entering the main body of the box, and the elastic pressing body arranged between the water stop plate and the groove surface of the guide groove stops the plate. A method for adjusting the water level of a paddy field in which the water plate is pressed against the water level adjusting plate. The water level adjusting method for a paddy field according to claim 7, wherein the water blocking packing fixed to the water stopping plate has a shape that also covers both end faces in the width direction of the water level adjusting plate. The water level adjusting method for a paddy field according to claim 7, wherein the water-stop packing is a pile-shaped material in which micropores are formed by entwining innumerable elastic short fibers and is fixed to the upper surface of the tape. The method for adjusting the water level of a paddy field according to claim 7, wherein the waterproof packing is rubber, sponge, or silicon which is an elastic body.

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