JP2018170978A - Rice paddy water level adjustment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice paddy water level adjustment device which has a simple structure in a mechanical construction, which can detect slight water level variation of flooding, which can feed water and stop water feeding as quickly as possible to a rice paddy in linkage with detected water level variation, and automatically maintain and manage a proper water level which is proper for the growth of flooding crop plants.SOLUTION: A lid body whose opening is energized is provided on an opening part of a water way pipe, to the lid body a tip end of a wire for opening/closing operations is connected, a base end part of the wire is connected to a float resin plate which floats on a rice paddy through a linkage connection tool, and the linkage connection tool is formed of: a guide pipe which is erected and fixed on an almost center part of the float resin plate; an anchor bolt which is erected and fixed to a lower farm field of the float resin plate and loosely fitted to inside of the guide pipe from a lower side; and a wire fixing tool which is provided on the guide pipe for tension and relaxing of the wire base end according to float-and-sink of the float resin plate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a paddy field water level adjusting device.

  Conventionally, in paddy fields where submerged crops such as rice and rush are planted, irrigation water is automatically supplied by detecting the lowering level of the submerged water and automatically when the submerged water reaches a certain level. There has been proposed an automatic water supply device that stops water and maintains a flooded water level suitable for the growth of flooded crops.

  For example, an automatic water supply apparatus according to Patent Document 1 has a communication hole in a side portion corresponding to the communication hole of the inner cylinder, and an inner cylinder connected to the irrigation water supply pipe having a communication hole in the side portion. The outer cylinder is fitted on the inner cylinder, and the float is connected to the outside of the outer cylinder and floated in the brine.

  According to such an automatic water supply device, as the float position is displaced downward in accordance with the lowered water level, the outer cylinder is rotated in a certain direction so that the communication holes on both side portions communicate with each other to supply water, while the rising water level is reached. At the same time, as the float position is displaced upward, the outer cylinder is rotated in the reverse direction to close each other's communicating holes and stop the water, so that the paddy water can be maintained at a constant water level.

JP 2002-335781

  In general, the flooding of paddy fields where flooded crops are planted is constantly decreasing due to the growth water absorption by flooded crops and the water evaporation due to weather conditions such as sunshine duration, humidity and wind. In addition, for the growth of flooded crops in paddy fields, it is important to supply a constant concentration of oxygen together with the supply of water and nutrients to the flooded crops by maintaining a constant water level.

  In order to maintain an appropriate water level with a constant oxygen content suitable for the growth of such submerged crops, it is necessary to perform water supply and stop water submergence work in conjunction with a minute level fluctuation of about 1 to 2 cm. There is.

  However, the above-mentioned conventional automatic water supply apparatus has a problem that it cannot catch the slight water level fluctuation of the lowering water level and the rising water level of the paddy field and cannot perform the appropriate water supply control in conjunction with the water level fluctuation. .

  That is, the floating operation of the float of the conventional automatic water supply device is centered on the outer cylinder and the inner cylinder on the mechanism that converts the buoyancy of the float to the rotational power of the outer cylinder centering on the inner cylinder in order to open and close the communication hole. It is an up and down motion that draws an arc-shaped trajectory.

  Therefore, since the conventional automatic water supply device makes the contact surface of the float contact with the water surface unevenly as the water level fluctuates, the float contact surface does not uniformly contact the water surface, and the paddy field varies depending on the part of the float. The buoyancy varies depending on the water level, and the contact surface between the water level and the float is not a horizontal plane and cannot be taken large. Therefore, a large water level fluctuation of 5-10 cm can be detected, but about 1-2 cm. Such subtle fluctuations in water level cannot be detected.

  For this reason, in the flooding operation of a vast paddy field, the original water supply cannot be sufficiently performed because the detected water level is inaccurate, and the water level in the field is reduced more than necessary, or the water level is increased due to extra flooding. Inaccurate detection of water level fluctuations, such as increase, and inconsistency in the exact flooding timing and flooding volume, making it impossible to carry out subtle flooding work appropriate for the growth of flooded crops. There was a risk of serious damage.

  The present invention has been made in view of such circumstances, and is capable of detecting a slight fluctuation in the level of brine while being simple in mechanical structure, and is possible in conjunction with the detected fluctuation in the water level. It is intended to provide a paddy field level control device that can promptly supply / stop water to paddy fields and can automatically maintain and maintain an appropriate water level suitable for the growth of flooded crops.

  In the present invention, an opening biased lid is provided at an opening of a water pipe, and a wire tip for opening / closing operation is connected to the lid, and the wire proximal end is connected to a float resin plate floating in a paddy field. The interlocking coupler is composed of a guide pipe that is erected and fixed substantially at the center of the float resin plate, and an anchor that is erected and fixed in the field below the float resin plate and is loosely fitted into the guide pipe from below. It is intended to provide a paddy field water level adjusting device characterized by comprising a bolt, a wire fixture attached to a guide pipe in order to tension and relax the wire base end in accordance with the float resin plate rising and sinking. .

  Further, the anchor bolt is provided with an idler wheel for converting the wire in a substantially right angle direction below the float resin plate.

  According to the first aspect of the present invention, an opening-biased lid is provided at the opening of the water channel pipe, the distal end of the wire for opening / closing operation is connected to the lid, and the base end of the wire floats in the paddy field The interlocking coupler is connected to the plate via an interlocking connector, and the interlocking connector is vertically fixed at a substantially central portion of the float resin plate, and is fixedly standing on the field below the float resin plate, and is lowered to the inside of the guide pipe. The anchor bolt that was loosely fitted from the wire and the wire fixture that was attached to the guide pipe in order to relax and relax the wire base end in accordance with the float and sink of the float resin plate. The contact surface with respect to the water surface is enlarged as much as possible, and the float resin plate can be moved up and down so that a slight decrease in water level or fluctuation in the water level can be detected with certainty.

  The float resin plate is moved up and down by a guide pipe erected and fixed substantially at the center of the float resin plate, an anchor bolt that is erected and fixed in the field below the float resin plate, and is loosely fitted into the guide pipe from below. Thus, the vertical motion is converted into a vertical motion.

  The guide pipe and anchor bolt convert the float up and down according to the water level that fluctuates up and down, that is, the up and down fluctuation buoyancy generated in the float resin plate with the fluctuation of the water level into the tension and relaxation stress of the wire, Transmit securely to the lid.

  That is, the tension / relaxation stress transmitted to the wire is transmitted to the lid of the opening portion of the water channel pipe, whereby the opening / closing operation of the lid linked to a slight fluctuation water level can be realized. In other words, the lid body opens and closes in conjunction with a slight fluctuation water level, and the paddy paddy water can be automatically maintained at a constant water level.

  Also, the anchor bolt is provided with an idler wheel for converting the wire in a substantially right angle direction below the float resin plate, so that the float resin plate is pushed on the flooded surface by wind or water while floating in the paddy field, and anchored. The twisting of the wire is prevented by inadvertently rotating around the bolt, and the tension direction of the wire is kept almost horizontal in the direction of the water pipe at the lower position of the float resin plate. Can be converted to an opening / closing operation of the lid body by correctly transmitting to the lid body.

It is a perspective view which shows the installation state of the paddy field water level adjustment apparatus which concerns on this embodiment. It is sectional drawing which shows the installation state of the paddy field water level adjustment apparatus which concerns on this embodiment. It is a top view which shows the installation state of the paddy field water level adjustment apparatus which concerns on this embodiment. It is explanatory drawing which shows the axial direction view of the water level adjustment pipe | tube which concerns on this embodiment. It is sectional drawing which shows the structure of the float resin board and anchor bolt which concern on this embodiment. It is a sectional side view which shows the structure of the interlocking connection tool which concerns on this embodiment. It is a sectional side view which shows the water supply stop state of the paddy field water level regulator which concerns on this embodiment. It is a sectional side view which shows the water supply operation state of the paddy field water level adjusting device which concerns on this embodiment.

  The present invention provides an opening-biased lid at the opening of a water pipe, and connects the distal end of a wire for opening / closing operation to the lid, and the base end of the wire is linked to a float resin plate floating in a paddy field. The interlocking coupler is composed of a guide pipe that is erected and fixed substantially at the center of the float resin plate, and an anchor that is erected and fixed to the field below the float resin plate and is loosely fitted into the guide pipe from below. The present invention provides a paddy field water level adjusting device characterized by comprising a bolt, a wire fixture attached to a guide pipe in order to relax and tighten the wire base end in accordance with the float / sink of the float resin plate.

  Hereinafter, the paddy field water level adjusting apparatus according to the present embodiment will be specifically described with reference to the drawings. FIG. 1 is a perspective view showing an installation state of a paddy field water level adjusting device. 2 is a cross-sectional view showing the installation state of the paddy field water level adjusting device, FIG. 3 is a plan view showing the installation state of the paddy field water level adjusting device, and FIG. 4 is an explanatory view showing the inside of the water level adjusting pipe in the axial direction view. .

  The paddy field in which the paddy field level control device A according to the present embodiment is installed is not particularly limited in terms of the flooding volume and the area of the field as long as the paddy field can be flooded at a certain level by irrigation.

  As shown in FIG. 1, a water pipe 102 for drawing irrigation water into a paddy field from a irrigation channel 103 and the like flowing along the outside of the paddy field is provided near the paddy shore so as not to impair the water pressure of the irrigation water. It is provided on the slope.

  That is, the paddy field communicates with the irrigation canal 103 and the like through the irrigation pipe 102 embedded in the basement or shore slope of the farm field 101. And the paddy field level control apparatus A which concerns on this embodiment is installed in the vicinity of the water pipe 102 in a paddy field, as shown in FIGS.

  As shown in FIGS. 1 to 3, the paddy field water level adjusting device A is provided with a cover body 2 that is biased to the opening 10 of the water channel pipe 1, and the cover body 2 is provided with a tip 30 of an opening / closing wire 3. The base end 31 of the wire 3 is connected to the float resin plate 4 floating in the paddy field via the interlocking connector 5.

  The water channel pipe 1 is a T-shaped (triangular) cylindrical tube that draws water into the paddy field through the water pipe 102. The water channel pipe 1 includes a cylindrical water level adjustment pipe 11 and a cylindrical water supply source connection pipe 12 branched from a substantially central portion of the water level adjustment pipe 11. In addition, the internal diameter of the water channel pipe concerning this embodiment is about 50-150 mm.

  Moreover, although the water pipe 1 of this embodiment employ | adopts the T-shaped pipe, if it has the water level adjustment function mentioned later, it will not be limited in a shape, For example, you may employ | adopt an L-shaped pipe. .

  The material of the water pipe 1 may be any material that has water resistance, durability, and corrosion resistance and can be piped in the field. For example, it is made of metal such as stainless steel or carbon steel, vinyl chloride, cross-linked polyethylene, polybutadiene. The thing made from resin, such as, can be employ | adopted.

  The water supply source connection pipe 12 is connected to an opening of the water pipe 102 provided in the paddy field in a watertight manner, and supplies water from the water pipe 102 into the water channel pipe 1. Moreover, the water supply source connection pipe 12 fixes and installs the water channel pipe 1 in the paddy field through the water pipe 102.

  As shown in FIGS. 1 to 4, two pipe fixing fittings 13 for fixing the water pipe 1 to the field are provided on the outer periphery of the left and right positions of the water level adjusting pipe 11 at a predetermined interval. As shown in FIG. 4, the pipe fixing bracket 13 has an upper half as an arc-shaped fixing part 13 a surrounding the outer peripheral surface of the water level adjusting pipe 11 and a lower half as a spiral part 13 b formed in a spiral shape.

  The pipe fixing bracket 13 is formed by screwing and embedding the spiral portion 13b in a substantially vertical direction with respect to the field scene of the paddy field, and surrounding the water level adjusting pipe 11 with the arc-shaped band-shaped fixing portion 13a to 101 is fixed to the surface.

  The water level adjustment pipe 11 has one end closed and the other end made an opening 10, and the opening 10 can be freely opened and closed by the lid body 2 to adjust water supply / stop water to the paddy field.

  The opening 10 of the water level adjusting pipe 11 functions as a water discharge part. The opening 10 is provided with an openable / closable lid 2 and is normally urged to open. The lid 2 is formed so as to be freely fitted into the opening 10 of the water level adjusting pipe 11.

  The closed end of the water level adjusting pipe 11 is closed and fixed in a watertight manner by the closing lid 7. As shown in FIGS. 2 to 3, a rod insertion hole 70 for inserting the opening / closing rod 61 into the water level adjusting pipe 11 is formed in the substantially central portion of the closing lid 7.

  An opening / closing mechanism for opening / closing the lid 2 is provided in the vicinity of the inner opening 10 of the water level adjusting pipe 11. The opening / closing mechanism includes a support stay 60 that traverses the water level adjusting pipe 11, an opening / closing rod 61 supported by the support stay 60, an opening urging spring 62 interposed between the lid 2 and the support stay 60, It consists of.

  The opening urging spring 62 is externally fitted to the opening / closing rod 61 and is interposed between the inner surface of the lid 2 and the support stay 60, and the lid 2 is always attached to the open state from the opening 10 of the water level adjusting pipe 11. It is fast.

  As shown in FIGS. 3 and 4, the support stay 60 is arranged transversely in the water level adjusting pipe 11 by connecting both ends thereof to the inner peripheral surface of the water level adjusting pipe 11. A rod insertion hole 63 for supporting the open / close rod 61 is formed in a substantially central portion of the support stay 60 at a position corresponding to the closing lid 7.

  The open / close rod 61 is a stainless steel metal rod and is inserted and extended in the rod insertion holes 63 and 70 of the support stay 60 and the closing lid 7 along the axis thereof in the water level adjusting pipe 11, and the tip thereof is the lid body 2. The opening adjusting nut 80 is screwed into the projecting end portion through the center, and the proximal end of the opening / closing rod 61 is connected to the distal end of the wire 3 for opening / closing operation.

  The open / close rod 61 moves forward and backward in the water level adjusting pipe 11 while being supported by the support stay 60 and the closing lid 7 by the opening urging spring 62 of the lid 2. That is, since the lid 2 is urged by the opening urging spring 62, the opening / closing rod 61 moves forward to form a water discharge gap 8 between the opening 10 and the lid 2, and the lid 2 is opened. When the opening and closing rod 61 is retracted by the tension of 3, the water discharge gap 8 is closed and closed.

  Moreover, the front-end | tip part of the opening-and-closing rod 61 protruded from the front surface of the cover body 2 is formed in the spiral screw shape, and as shown in FIGS. An opening adjusting nut 80 is screwed. The opening adjustment nut 80 is used to adjust the position of the lid body 2 connected to the support stay 60, and the lid body 2 is displaced by adjusting the opening adjustment nut 80 to adjust the opening degree of the water discharge gap 8. Is possible.

  Next, a description will be given of the related mechanism of the float resin plate 4 and the interlocking connector 5 for transmitting the fluctuation of the water level in the field to the wire while functioning as a water level sensor. FIG. 5 is a side sectional view showing the structure of the float resin plate and the anchor bolt, and FIG. 6 is a side sectional view showing the structure of the interlocking connector.

The float resin plate 4 is a rectangular plate-like member that is floated on the water surface of a paddy field and detects fluctuations in the level of brine. The float resin plate 4 according to the present embodiment is formed of a rectangular plate-shaped foamed polystyrene having an area of about 1 m ² and a thickness of about 4 cm.

  In addition, the material of the float resin board 4 should just produce a buoyancy with respect to water, for example, solid buoyancy material, such as a polystyrene foam, a foamed polypropylene, and a foamed polyethylene, the gas enclosure buoyancy which has several temperament with a resin film Material can be adopted.

  In the float resin plate 4, an interlocking connector 5 composed of a guide pipe 50, an anchor bolt 9, and the like is disposed in the vertical direction in a substantially central portion, and is interlocked with the wire 3 via the interlocking connector 5. Yes.

  As shown in FIG. 1 to FIG. 3 and FIG. 5 to FIG. 6, the interlocking connector 5 is erected in a field below the float resin plate 4 and a guide pipe 50 that is erected and fixed substantially at the center of the float resin plate 4. An anchor bolt 9 that is loosely fitted from below the pipe for fixing and supporting the guide pipe 50 and a guide pipe for supporting the proximal end portion of the wire 3 that is tension-relaxed as the float resin plate 4 rises and falls. And a wire fixture 52 provided in the middle of the 50 peripheral wall.

  The guide pipe 50 is a metal cylinder, and is erected at a substantially central portion of the flat plate surface of the float resin plate 4. An elongated wire fixture 52 is attached to the upper peripheral wall of the guide pipe 50 along the length of the guide pipe 50 via a support stay 54.

  The support stay 54 protrudes horizontally from the upper peripheral wall of the guide pipe 50, and a screwing hole 54a for connecting the wire fixing member 52 is provided at a substantially central portion thereof. The screwing hole 54a is provided at the upper end with a wire operation part 55. The wire adjusting screw 56 having the shape of the wire 3 is screwed and suspended, and a wire connecting portion 57 for connecting the base end of the wire 3 is formed at the lower end thereof.

  The wire adjustment screw 56 has a ring-shaped wire operation portion 55 for adjusting the length of the wire 3 at the upper end, and when performing an adjustment operation, an operation rod is inserted into the ring hole from the lateral direction and rotated. The wire adjusting screw 56 is moved up and down to adjust the length of the wire 3 by rotating the wire adjusting screw 56 with the contact portion between the rod and the ring hole as a fulcrum and the gripping portion holding the operation rod as a force point.

  That is, the wire adjusting screw 56 is adjusted by finely adjusting the length of the wire 3 extending from the float resin plate 4 to the proximal end of the opening / closing rod 61, that is, the tension of the wire 3. The relaxation phenomenon is corrected, and the float / sink operation of the float resin plate 4 can be accurately transmitted to the open / close rod 61 and the lid 2 via the wire 3.

  The wire adjusting screw 56 is screwed into the screwing hole 54a of the support stay 54 and is moved up and down in accordance with the turning operation of the wire operation portion 55, thereby enabling the wire 3 to be tensioned.

  A wire 3 base end is connected and fixed to the wire connecting portion 57, and is configured to be able to rotate 360 ° around the wire fixing tool 52 at the lower end of the wire adjusting screw 56. To prevent twisting.

  The float resin plate 4 is provided with a wire insertion hole 40 adjacent to the guide pipe 50, and the wire 3 connected and fixed to the wire connection portion 57 penetrates the wire insertion hole 40 to float the resin plate 4. And is turned to a substantially right angle by an idler wheel 93, which will be described later, and extends toward the proximal end of the opening / closing rod 61.

  As shown in FIG. 5, the anchor bolt 9 includes a spiral portion 90 having a lower half formed in a spiral shape, and an upper half formed as a cylindrical loose fitting portion 91. The spiral portion 90 is formed in a rice field. It is screwed and embedded in a substantially vertical direction to be fixed upright on the field.

  As shown in FIGS. 2 and 5, the loosely fitting portion 91 of the anchor bolt 9 that is erected and fixed in the field is inserted into the pipe 50 from the lower opening of the guide pipe 50 that is erected in the float resin plate 4. It is loosely fitted.

  By configuring in this manner, the float resin plate 4 can float and sink in the vertical direction along the anchor bolt 9 without floating horizontally.

  Further, as shown in FIG. 6, an idler wheel 93 for changing the wire 3 to a substantially right angle at a position below the float resin plate 4 is provided at the substantially central portion of the anchor bolt 9 according to the present embodiment. It protrudes toward the 61 direction.

  The idler wheel 93 is a pulley composed of a bearing 96 and a pulley 95. The idler wheel 93 protrudes in the direction of the open / close rod 61, that is, in the tension expansion / contraction direction of the wire 3, via a stay 94 that is a band bracket surrounded by a substantially central portion of the anchor bolt 9. Therefore, the tension expansion / contraction direction of the wire 3 whose direction is changed by the idle wheel 93 is restricted to the axial direction of the water level adjusting pipe 11.

  Therefore, as shown in FIGS. 1 to 3, the wire 3 having a predetermined length is stretched between the water channel pipe 1 and the float resin plate 4 in a tensioned state.

  That is, the wire 3 is always stretched in a tension state between the openable / closable lid 2 urged at the opening 10 of the water channel pipe 1 and the float resin plate 4 floating in the paddy field. In accordance with the float / sink operation of the float resin plate 4, the tension / relaxation operation is performed in the opening direction of the lid body 2 or in the closing direction.

  Note that the material of the wire 3 is preferably a material having durability against tensioning action and corrosion resistance against water, and for example, a metallic steel wire such as stainless steel, titanium, tungsten, zinc, etc. can be adopted.

  And the paddy field water level control apparatus A which concerns on this embodiment is stopped while performing the opening / closing operation | movement of a cover body automatically in connection with a water level fluctuation | variation in the paddy field where the flooded crop was planted and filled with flooding. Adjust the water operation and water supply amount. Hereinafter, the water level adjustment function of the paddy field water level adjustment apparatus A according to the present embodiment will be described in detail. FIG. 7 is a side sectional view showing a water supply stop state of the paddy field water level adjusting device A. FIG. 8 is a side sectional view showing a water supply operation state of the paddy field water level adjusting apparatus A.

  First, the state which stops water supply of the paddy field water level control apparatus A which concerns on this embodiment is demonstrated. As shown in FIG. 7, in the paddy field water level adjusting apparatus A, the opening 10 of the water channel pipe 1 is closed by the lid body 2 when the paddy water is in an appropriate constant water level.

  That is, in a state where the float resin plate 4 is floating at an appropriate water level, the lid 2 is closed against the opening biasing spring 62 by pulling the tensioned wire 3 and the opening / closing rod 61 at the tip.

  In other words, the buoyancy of the float resin plate 4 that floats at an appropriate water level resists the spring stress of the opening biasing spring 62 and pulls the opening / closing rod 61 so that the lid 2 at the tip thereof is always watertight in the opening 10. Close blockage.

  Next, a state where the water supply operation is performed from the water supply stop state to the paddy field water level adjusting apparatus A according to the present embodiment will be described. When the flooding of the paddy field decreases and the water level falls, the float resin plate 4 floating on the paddy field is guided by the anchor bolt 9 according to the degree of the descent of the water surface as shown in FIG. Descent.

  That is, the displacement phenomenon of the float resin plate 4 from the appropriate water level to the lowered water level and the displacement amount are transmitted to the wire 3.

  The wire 3 relaxes in the downward direction by the amount of the downward displacement of the float resin plate 4. To loosen the wire 3, the open / close rod 61 is pulled together with the lid 2 by the opening urging spring 62 through the idler wheel 93 in the lid opening direction. As a result, the lid body 2 is moved away from the opening 10 of the water level adjusting pipe 11, and the lid body 2 is opened.

  Specifically, the open / close rod 61 to which the wire 3 relaxation stress is transmitted is moved forward along the axis of the water level adjusting pipe 11 while being supported by the support bias 60 and the closing lid 7 by the opening biasing spring 62. The lid 2 connected to the tip of the open / close rod 61 is opened to form a water discharge gap 8 between the opening 10 of the water level adjusting pipe 11 and the lid 2 to bring the paddy water level adjusting device A into a water supply state.

  In other words, the opening biasing spring 62 that is compressed between the lid 2 and the support stay 60 is released and restored by the loosening of the wire 3, and the lid 2 is opened together with the opening / closing rod 61. It is urged from 10 toward the opening direction.

  As a result, as shown in FIG. 8, in the paddy field water level adjusting apparatus A, the float resin plate 4 descends in conjunction with the lowering of the water level, and the opening 10 of the water channel pipe 1 is opened, that is, the opening 10 and the lid. The water discharge gap 8 is formed between the water pipe 2 and the water from the water pipe 102 is discharged and supplied to the paddy field.

  Next, the state where the water stop operation is performed from the water supply state of the paddy field water level adjusting apparatus A according to the present embodiment will be described.

  The float resin plate 4 floats due to the water level gradually rising by starting the water supply operation as described above. As the float resin plate 4 floats, the wire 3 is pulled upward to pull the open / close rod 61 against the opening biasing spring 62 in the lid closing direction.

  That is, the lid 3 is closed by the tension stress of the wire 3 corresponding to the displacement distance from the lowered water level to the appropriate water level of the float resin plate 4 to create a water supply stop state.

  In other words, the buoyancy of the float resin plate 4 according to the rising water level is transmitted to the pulled wire, and the opening / closing rod 61 moves the lid body 2 in the closing direction against the urging force of the opening urging spring 62.

  As a result, the opening 10 of the water channel pipe 1 that has been opened at the time of water supply is closed by the lid 2, the water discharge gap 8 is eliminated, and the water is stopped as shown in FIG. 7.

  As described above, the paddy field level adjusting device A always detects the fluctuation of the water level raised by the water supply by the float resin plate 4 and gradually pulls the opening / closing rod 61 with the tensioning wire 3 until the lid body 2 reaches an appropriate water level. Move in the closing direction. When the proper water level is finally reached, the water is stopped with a completely closed state in order to complete the water supply.

  Thus, the paddy field water level adjusting device A always detects the water level fluctuation of the paddy field by the float resin plate 4, and the water channel interlocked with the fluctuation of the water level through the wire 3 tensioned between the float resin plate 4 and the water channel pipe 1. The opening / closing operation of the lid 2 of the pipe 1 and the adjustment of the opening degree are automatically performed.

  According to the paddy field water level adjusting apparatus according to the present invention, slight fluctuations in the water surface accompanying the increase or decrease of the paddy field water level are detected by the float resin plate, and water supply to the paddy field, water stoppage or water supply amount at an appropriate timing linked to the water level fluctuation. It can be done automatically.

  Finally, the description of each embodiment described above is an example of the present invention, and even if it is other than the above-described embodiment, the scope of the technical idea according to the present invention is within the scope of design and the like. Of course, various modifications are possible.

A Paddy level control device 1 Water pipe 2 Lid 3 Wire 4 Float resin plate 5 Interlocking connector 7 Closure lid 9 Anchor bolt 10 Opening portion 50 Guide pipe 52 Wire fixture

Claims (2)

An opening-biased lid is provided at the opening of the water channel pipe, and a wire tip for opening / closing operation is connected to the lid, and the base end of the wire is connected to a float resin plate floating in a paddy field via an interlocking connector. With
The interlocking coupler is
A guide pipe that is erected and fixed substantially at the center of the float resin plate;
Anchor bolts that are erected and fixed to the lower field of the float resin plate and are loosely fitted into the guide pipe from below,
A paddy field water level adjusting device comprising: a wire fixture attached to a guide pipe for tension and relaxation of a wire base end in accordance with the float and sink of a float resin plate.   The paddy field water level adjusting device according to claim 1, wherein the anchor bolt is provided with an idler wheel for converting the wire in a substantially right angle direction below the float resin plate.