JP3198990U - Dredging control of farmland - Google Patents

Abstract

[PROBLEMS] To provide a depth control pad for a farmland that can easily adjust the water level of a paddy field, is less susceptible to frost damage, can be custom-made in dimensions, and can be reused when discarded after its useful life. A water depth control rod includes a bottom plate 1E, a back plate 1B, and a pair of side plates 1C1 and 1C2, with a front 1A opening and left and right front opening side edges 1A1 and 1A2 facing upward. And a pair of lid receiving portions 1F1 and 1F2 having an L-shaped cross section continuously provided along the left and right front opening side edges, and a drain port 1H provided in the housing. A synthetic resin lid having an upper lid plate 2A and a lower lid plate 2B, which is disposed so as to partially cover the opening of the cage main body and supported by a pair of lid receiving portions. Part 2. Slide the upper lid so that it overlaps the back side of the lower lid and adjust the water level of the paddy field. [Selection] Figure 1

Description

  The present invention relates to a dredging depth control paddy for farmland for adjusting the water level of paddy fields with high accuracy.

  In paddy fields, it is necessary to finely adjust the water level according to the growth stage of rice and the outside temperature. For example, subtle adjustments are required, such as making the water level shallow immediately after planting and deepening when the outside air temperature is low.

  Conventionally, the water level has been adjusted to a desired level by fitting a plurality of plates having different heights into grooves provided in the longitudinal direction on the front side (paddy field side) of the drainage side wall. However, this method has a problem that the water level cannot be finely adjusted because it is a combination of plates. In addition, it is necessary to apply mud to the combined boards to cover the boards, which is particularly troublesome for farmers who have many paddy fields.

  In order to solve such a problem, Patent Document 1 proposes a water level adjusting pad for paddy fields and a water level adjusting method capable of adjusting the water level in millimeters with a simple operation by sliding the water level adjusting plate. .

Japanese Patent No. 4817159

  In the paddy field water level adjusting pad and the water level adjusting method of Patent Document 1 described above, fine water level adjustment can be easily performed. However, since the paddle is made of concrete, there is a problem of cracking due to frost damage. In addition, concrete can only be made in standard size because it is molded into a mold, but actual paddy fields have various shore widths, and it may be difficult to install standard size paddles. Furthermore, after the service life has elapsed, it must be disposed of as industrial waste, which places a burden on the environment.

  The purpose of the present invention is to provide paddy depth control dredging for farmland that can easily adjust the water level of paddy fields, is resistant to frost damage, can be made to order, and can be reused after disposal after its useful life. It is to be.

  In order to solve the above-described problems, the present invention has the following configuration. The numbers in parentheses are reference numerals in the drawings to be described later, and are attached for reference.

An aspect of the present invention is a dredging depth control dredging,
In the dredging control dredging of farmland to adjust the water level of paddy field,
It has a bottom plate (1E), a back plate (1B), and a pair of side plates (1C1,1C2). The front (1A) opens and the left and right front opening side edges (1A1,1A2) face upward. A case inclined to the rear side, a pair of L-shaped lid receiving portions (1F1, 1F2) respectively connected along the left and right front opening side edges (1A1, 1A2), and the case A metal dredge body (1) having a drain outlet (1H) provided;
It has an upper lid plate (2A) and a lower lid plate (2B) that are arranged so as to partially cover the opening of the bag main body (1) and are supported by a pair of lid receiving portions (1F1, 1F2) A synthetic resin lid (2),
The water level of the paddy field is adjusted by sliding the upper lid plate (2A) so as to overlap the back side of the lower lid plate (2B) along the lid receiving portion (1F1, 1F2).

  In the above aspect, the inclination angle of the front opening side edge (1A1, 1A2) is 60 ° to 70 ° with respect to the bottom plate (1E).

  In the above aspect, a guide portion (2B31, 2B32) is provided along at least one of the left and right edges of the back surface (2B2) of the lower lid plate (2B), and the upper lid plate (2A) includes the guide portion. It slides along (2B31, 2B32).

  In the above aspect, a rectangular locking plate (2C1) that is attached to the upper portion of the upper lid plate (2A) and has a rotation shaft at the center in the width direction is provided, and the locking plate (2C1) is rotated. The upper lid plate (2A) is fixed by bringing two apexes on the diagonal line into contact with and engaging with the pair of lid receiving portions (1F1, 1F2).

  In the above aspect, the lower edge of the lower lid plate (2B) is supported by the lower lid plate support portion (1G) having an L-shaped cross section attached to the lower edge of the opening of the bag main body (1). Features.

  In the above aspect, the drain port (1H) is attached to a hole formed in one of the back plate (1B), the pair of side plates (1C1, 1C2), or the bottom plate (1E). Features.

  According to the dredging depth control rod according to the present invention, the water depth of the paddy field can be finely adjusted by a simple operation as required.

  According to the present invention, unlike concrete, it is less susceptible to frost damage and can be made to order. In addition, it can be reused as a metal resource when discarded after a future service life.

FIG. 1 is an overall perspective view schematically showing a configuration example in a first embodiment of a flooded depth control paddy for farmland according to the present invention. 2A, 2B, 2C, and 2D are a front view, a side view, and a cross-sectional view of the bag body of the configuration example shown in FIG. 3A1, 3A3 and 3A3 are a front view, a top view, and a side view of the lid portion of the configuration example shown in FIG. 4 (a) and 4 (b) are diagrams for explaining the usage state of the configuration example shown in FIG. 1 and the installation state in a paddy field. FIGS. 5A, 5B, 5C1, 5C1, 2D1, and 2D3 are diagrams schematically illustrating a configuration example of the second embodiment of the present invention. FIGS. 6 (a1), (a2), (b1), (b2), (b3), (c1), and (c2) are diagrams schematically showing a configuration example of the third embodiment of the present invention.

  Hereinafter, the depth control dredging of the farmland which concerns on embodiment of this invention is demonstrated in detail, referring drawings. In addition, the same code | symbol is attached | subjected about the same or similar component in each drawing.

  FIG. 1 is an overall perspective view schematically showing a configuration example in a first embodiment of a flooded depth control paddy for farmland according to the present invention. 2 (a) and 2 (b) are a front view and a side view of the dredging body 1 of the dredging depth control dredging shown in FIG. 1, (c) is a cross-sectional view taken along line II of (a), and (d) is It is a figure which shows the II-II cross section of (a). 3 (a1), (a2), and (a3) are a front view, a top view, and a side view of the upper lid plate and the lower lid plate in the lid portion of the flooded depth control rod shown in FIG.

  As shown in FIG. 1, the water depth control rod 10 is composed of a rod body 1 and a lid 2. The bag body 1 includes at least a bottom plate 1E and a back plate 1B that are square plates, and a pair of side plates 1C1 and 1C2 that are trapezoidal plates, and has a casing in which the front surface 1A that is a rectangle is open. The back plate 1B and the side plates 1C1 and 1C2 stand upright at a right angle to the bottom plate 1E. Front opening side edges 1A1 and 1A2 respectively positioned on the left and right of the front opening are inclined upward toward the back side. The inclination angle α shown in FIG. 2C is preferably 60 ° to 70 ° with respect to the bottom plate 1E. However, the inclination angle α is not limited to this range.

  The lid portion 2 is composed of an upper lid plate 2A and a lower lid plate 2B, and is arranged so as to partially cover the opening of the front surface 2A of the bag main body 1. A pair of lid receiving portions 1F1 and 1F2 made of a bending plate having an L-shaped cross section are provided along the front opening side edges 1A1 and 1A2 of the bag main body 1, respectively. That is, these lid receiving portions 1F1 and 1F2 are inclined at the same angle as the front opening side edges 1A1 and 1A2. These lid receiving portions 1F1 and 1F2 support and guide the vicinity of the left and right side edges of the upper lid plate 2A and the lower lid plate 2B. Preferably, the lid receiving portions 1F1 and 1F2 are joined to the housing by welding. Although not shown, as another example, a connection by bolt and nut connection is also possible. As shown in FIG.2 (d), 1st surface 1F11, 1F21 is extended in the left-right direction at right angles with respect to a pair of side surface board 1C1, 1C2 among two surfaces which comprise an L-shaped cross section. The second surfaces 1F12 and 1F22 extend forward at right angles from the outer edges of the first surfaces 1F11 and 1F21, respectively.

  Preferably, a lower cover plate support portion 1G made of a bent plate having an L-shaped cross section is provided at the lower edge of the front opening 1A. The lower lid support 1G is provided to reinforce the lid receiving function of the lid receiving portion 1F. The first surface 1G1 constituting the L-shaped cross section is inclined from the lower edge of the front opening 1A (the front edge of the bottom plate 1E) upward to the back side at the same angle as the front opening side edges 1A1 and 1A2. Extend. The second surface 1G2 extends forward at a right angle to the first surface 1G1.

  Further, a drain port 1H is provided at the lower part of the back plate 1B. The drain port 1H is composed of a circular hole formed in the casing of the main body 1 and a cylindrical member that is attached around the hole and extends to the outside of the casing.

  In the illustrated example, the drain port 1H is provided in the lower part of the back plate 1B, but may be provided in the side plates 1C1 and 1C2, or may be provided in the bottom plate 1E. When the drain port 1H is provided on the back plate 1B, for example, an elbow pipe component can be attached to the drain port 1H. When the drain port 1H is provided on the bottom plate 1E, the water level can be set by inserting a vinyl chloride pipe into the interior from the drain port 1H and extending vertically.

  In the present invention, the material of the bag main body 1 is a metal, for example, an iron plate galvanized. Other metals may be used as long as they are suitable for processing such as cutting, bending and welding and are resistant to rust. In the present invention, the size of the bag body 1 is not limited. Making use of the metal processing aptitude, the dimensions can be made to order according to the installation location.

  In the illustrated example, the lid receiving portions 1F1 and 1F2 are provided so as to protrude outward from the front opening side edge 1A1, but may be provided inside the front opening side edge 1A1.

  In the illustrated example, the upper surface plate 1D is provided on the upper surface of the bag main body 1, but this is not an essential component. When the top plate 1D is not provided, the outline shape of the side plates 1C1 and 1C2 may be a substantially right triangle instead of the trapezoid.

  As shown in FIGS. 1 and 3, the lid 2 is composed of an upper lid plate 2A and a lower lid plate 2B. The upper lid plate 2A and the lower lid plate 2B have their left and right side edge vicinity portions supported on the first surfaces 1F11 and 1F21 of the lid receiving portions 1F1 and 1F2, and moved along the lid receiving portions 1F1 and 1F2. Is possible. The second surfaces 1F12 and 1F22 of the lid receiving portions 1F1 and 1F2 guide the movement of the upper lid plate 2A and the lower lid plate 2B. That is, the upper lid plate 2A and the lower lid plate 2B can be arranged and moved at an inclination at the same angle as the front opening side edges 1A1 and 1A2. Further, preferably, a portion near the lower edge of the lower lid plate 2B is supported by the first surface 1G1 of the lower lid plate support portion 1G. Thereby, the lower part of the lower cover plate 2B can maintain flatness without causing bending or distortion due to earth pressure.

  In the illustrated example, the upper lid plate 2A and the lower lid plate 2B are rectangular flat plates having the same dimensions. Examples of the material of the upper lid plate 2A and the lower lid plate 2B include vinyl chloride, but other synthetic resin materials may be used, and it is preferable that the materials have high workability and durability and high strength.

  Fig.4 (a) is a figure for demonstrating the use condition which controls the water level of a paddy field using the dredging depth control dredge shown in FIG. In FIG. 1 described above, the lower edge of the upper lid plate 2A and the upper edge of the lower lid plate 2B are at the same position, and this is the control position of the highest water level. When controlling the water level of the paddy field to a desired water level lower than the highest water level, the upper lid plate 2A is slid along the lid receiving portions 1F1 and 1F2 so as to overlap the back side of the lower lid plate 2B (see arrows). . Thereby, the water level can be adjusted by changing the position of the upper edge of the upper lid plate 2A.

  FIG.4 (b) is the figure which showed roughly the state which installed the control paddle which adjusted the cover part 2 like (a) in the paddy field. The main body 1 is installed with the front opening facing the paddy field and the back plate facing the shore. In addition, it installs so that the surface of the paddy soil S may be located near the upper edge of the lower lid 2B.

  The upper lid plate 2A and the lower lid plate 2B are pressed against the lid receiving portions 1F1 and 1F2 by earth pressure and / or water pressure from the soil S and / or water W. The upper lid plate 2A is in close contact with the lid receiving portions 1F1 and 1F2. The lower lid plate 2B is in close contact with the lid receiving portions 1F1, 1F2, the lower lid plate support portion 1G, and the upper lid plate 2A. Since the lid part 2 is formed of a material having a predetermined flexibility, it can be appropriately deformed by pressure and brought into close contact with the lid receiving part. As a result, there is no leakage from the portion from the lower edge of the lower lid 2B to the upper edge of the upper lid 2A. Further, since the upper lid plate 2A and the lower lid plate 2B are overlapped with each other, the proof stress is increased, so that the flatness can be maintained without causing large deflection or distortion.

  For example, when the upper lid plate 2A is adjusted to a desired height and water is supplied to the paddy field, water W accumulates in the paddy field up to the position of the upper edge of the upper lid plate 2A. The amount of water exceeding the upper edge of the upper lid plate 2A flows into the bag body 1 and is drained through the drain port 1H (see arrow).

  FIG. 5: is the figure which showed schematically the example of a structure of 2nd Embodiment of the flooding depth control dredging of a farmland by this invention, (a) is a front view, (b) is III-III of (a). Sectional drawing, (c1) and (c2) are a front view and a top view of the upper lid plate of the configuration shown in (a), and (d1), (d2), and (d3) are the lower lid plate of the configuration shown in (a). It is a front view, a rear view, and a top view.

  In the second embodiment, guide portions 2B31 and 2B32 are provided along the left and right side edges of the back surface 2B2 of the lower lid plate 2B. Each guide portion is a protrusion having a predetermined width and thickness, and extends almost the entire length of the left and right side edges. On the other hand, the width of the upper lid plate 2A is narrower than the lower lid plate 2B by the width of the guide portions 2B31, 2B32, and the upper lid plate 2A can be slid up and down along the guide portions 2B31, 2B32. it can. In the illustrated example, the guide portions 2B31 and 2B32 are provided on the left and right side edges of the lower lid plate back surface 2B2, but may be provided only on the left or right edge.

  FIG. 6 is a diagram schematically showing a configuration example of a third embodiment of a flooded depth control paddy of a farmland according to the present invention, (a1) is a front view, and (a2) is a configuration shown in (a1). (B1) (b2) (b3) is a front view, a top view and a side view of the upper lid plate of the configuration shown in (a1), and (c1) and (c2) are shown in (a1). It is the front view and side view for demonstrating the use condition of the structure which was prepared.

  An upper lid fixing portion 2C is provided above the upper lid plate surface 2A1. The upper lid fixing portion 2C includes a rectangular locking plate 2C1 having a horizontal width equal to the horizontal width of the lower lid plate 2A and an appropriate vertical width, a rotating shaft 2C2 provided at the center in the horizontal width direction of the locking plate 2C1, and an engagement. It comprises a handle 2C3 provided at the upper end of the stop plate 2C1.

  The rotation shaft 2C2 is provided through the locking plate 2C1 and the upper lid plate 2A, and the upper lid fixing portion 2C can be rotated around the rotation shaft 2C2. The handle 2C3 is preferably provided to slide the upper lid plate 2A or rotate the locking plate 2C1, but is not an essential component.

  When adjusting the water level, for example, the upper lid plate 2A is slid to a desired height, and the locking plate 2C1 is rotated. At this time, the locking plate 2C1 can be rotated by separating the upper lid fixing portion 2C and the upper portion of the upper lid plate 2A from the lid receiving portions 1F1 and 1F2 and slightly floating them. After the rotation, the two apexes on the diagonal line of the inclined locking plate 2C1 are brought into contact with and locked to the second surfaces 1F12 and 1F22 of the lid receiving portions 1F1 and 1F2, respectively. Thereby, the height of the upper lid plate 2A can be fixed. P1 and P2 indicate locking points at which the locking plate 2C1 and the second surfaces 1F12 and 1F22 of the lid receiving portion abut.

  In the configuration example of FIG. 6, the upper lid plate 2A and the lower lid plate 2B are those of the second embodiment shown in FIG. 5, but can be applied to the first embodiment shown in FIG. .

  Each of the embodiments of the present invention described above is an example, and various modifications other than these can be applied, and these are also included in the present invention. .

10, 20, 30: Dredging depth control rod 1: Dredging body 1A: Front opening 1A1: Front opening side edge 1B: Back plate 1C1, 1C2: Side plate 1D: Top plate 1E: Bottom plate 1F1, 1F2: Lid receiving portion 1F11 1F21: lid receiving portion first surface 1F12, 1F22: lid receiving portion second surface 1G: lower lid plate supporting portion 1G1: lower lid plate supporting portion first surface 1G2: lower lid plate supporting portion second surface 1H: drain port 2: Lid 2A: Upper lid plate 2A1: Upper lid plate surface 2B: Lower lid plate 2B1: Lower lid plate surface 2B2: Lower lid plate rear surface 2B31, 2B32: Guide portion 2C: Upper lid fixing portion 2C1: Locking plate 2C2: Rotating shaft 2C3: handle P1, P2: locking point W: water S: soil

Claims (6)

In the dredging control dredging of farmland to adjust the water level of paddy field,
It has a bottom plate (1E), a back plate (1B), and a pair of side plates (1C1,1C2). The front (1A) opens and the left and right front opening side edges (1A1,1A2) face upward. A case inclined to the rear side, a pair of L-shaped lid receiving portions (1F1, 1F2) respectively connected along the left and right front opening side edges (1A1, 1A2), and the case A metal dredge body (1) having a drain outlet (1H) provided;
It has an upper lid plate (2A) and a lower lid plate (2B) which are arranged so as to partially cover the opening of the bag main body (1) and are supported by a pair of lid receiving portions (1F1, 1F2) A synthetic resin lid (2),
The water level of the paddy field is adjusted by sliding the upper lid plate (2A) so as to overlap the back side of the lower lid plate (2B) along the lid receiving portion (1F1, 1F2). The depth control of water. 2. The depth control paddle for agricultural land according to claim 1, wherein an inclination angle of the front opening side edge (1A1, 1A2) is 60 ° to 70 ° with respect to the bottom plate (1E). A guide portion (2B31, 2B32) is provided along at least one of the left and right edges of the back surface (2B2) of the lower lid plate (2B), and the upper lid plate (2A) includes the guide portion (2B31, 2B32). 3) The water depth control dredging of the farmland according to claim 1 or 2. It has a rectangular locking plate (2C1) attached to the upper part of the upper lid plate (2A) and having a rotation shaft at the center in the width direction, and the locking plate (2C1) is rotated to form a diagonal line The upper lid plate (2A) is fixed by bringing the top two apexes into contact with and engaging with the pair of lid receiving portions (1F1, 1F2). Dredging depth control of farmland. The lower edge of the lower lid (2B) is supported by a lower lid support (1G) having an L-shaped cross section attached to the lower edge of the opening of the bag main body (1). Item 5. A flood control center for farmland according to any one of Items 1 to 4. The drain port (1H) is attached to a hole formed in any one of the back plate (1B), the pair of side plates (1C1, 1C2), or the bottom plate (1E). Item 5. A watershed control rod for farmland according to any one of Items 1 to 5.

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