Water level adjustment device

Abstract

To provide a water level adjustment device that allows easy fixing of a weir plate.SOLUTION: A water level adjustment device 1 includes a weir plate 2 having a V-shaped notch formed at an upper portion thereof and configured to adjust an amount of water to be dammed according to an installation height, and a frame body 3 that holds the weir plate 2 so as to be movable up and down. The frame body 3 is provided with guide portions 13, 13 having guide grooves 15, 15 that directly hold the weir plate 2. The guide portions 13, 13 are provided with fixtures 16, 16, ... that are switchable between a fixed state, in which the weir plate 2 is fixed, and a non-fixed state, in which vertical movement of the weir plate 2 is not restricted. After the position of the weir plate 2 is determined, the weir plate 2 is fixed by switching the fixtures 16, 16, ... to the fixed state.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a water level adjustment device that is installed between a rice field and a levee and controls the water level in the rice field and the amount of water that flows from the rice field to the levee. [Background technology]

[0002] Conventionally, there has been known a water level adjustment device that fixes a weir plate for adjusting the water level by earth pressure. For example, Patent Document 1 describes a water level adjustment device in which a pressure plate is tilted backward around a pressure plate support groove as a fulcrum by water pressure and / or earth pressure, thereby maintaining the water level adjustment plate at a desired water level adjustment height. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-136879 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the water level adjustment device of Patent Document 1 has a configuration in which the dam plate is fixed by water pressure and / or earth pressure, and therefore has a problem in that the dam plate cannot be easily fixed after being positioned.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a water level adjusting device that allows the weir plate to be easily fixed. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the invention described in claim 1 is a water level adjustment device installed in a manhole located between a rice levee and a rice field, comprising a weir plate with a V-shaped notch at the top that adjusts the amount of water to be blocked depending on the height at which it is installed, and a frame body that holds the weir plate so that it can move up and down, the frame body consisting of a plate-shaped frame main body and a pair of guide parts that are arranged opposite each other on both the left and right sides of the frame main body, extend from the lower end of the frame main body above the upper end of the frame main body, and each have a vertical guide groove on the opposing surface, the weir plate is held so that it can move up and down, with its lower part overlapping the upper part of the frame main body, by having both left and right ends sandwiched between the guide grooves of each guide part, and each guide part is equipped with a fixing device that can be switched between a fixed state in which the weir plate is pressed against the inner surface of the guide groove to fix it, and an unfixed state in which the up and down movement of the weir plate is not restricted. Furthermore, the invention described in claim 2 is characterized in that, in the invention described in claim 1, each guide section is provided with a temporary fixing device that holds the dam plate so that it can move up and down and be positioned at any position in the vertical direction by pressing the dam plate against the inner surface of the guide groove when the fixing device is not fixed. Furthermore, the invention described in claim 3 is characterized in that, in the inventions described in claims 1 and 2, it has a protrusion that is provided on the frame body on the opposite side of the fixing device that sandwiches the frame body, and abuts against the manhole to maintain the water level adjustment device in an upright position. [Effects of the Invention]

[0007] According to the present invention, the structure comprises a dam board and a frame main body portion provided with a guide groove that holds the dam board so that it can move up and down, and after determining the position of the dam board, the dam board is fixed by fixing a bolt-made fixing device provided in the guide groove. Therefore, the dam board can be easily fixed. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a front view of the water level adjustment device according to the present invention. [Figure 2] FIG. 2 is a rear view of the water level adjustment device according to the present invention. [Figure 3] FIG. 2 is a plan view of the water level adjustment device according to the present invention. [Figure 4] FIG. 10 is a front view showing the state in which the dam plate has moved. [Figure 5] FIG. 10 is a rear view showing the state in which the dam plate has been moved. [Figure 6] FIG. 2 is a central vertical cross-sectional view showing the installation state of the water level adjustment device. [Figure 7] FIG. 10 is a front view showing a modified example of the water level adjusting device. DETAILED DESCRIPTION OF THE INVENTION

[0009] An embodiment of the present invention will now be described with reference to the accompanying drawings. Figures 1 to 3 show the water level adjustment device 1 according to the present invention, with Figure 1 being a front view, Figure 2 being a rear view, and Figure 3 being a plan view. The handle portion 11 is omitted in Figure 3. Figures 4 and 5 show the state in which the dam plate 2 has been moved, with Figure 4 being a front view and Figure 5 being a rear view. Figure 6 is a central vertical cross-sectional view showing the installed state of the water level adjustment device 1. In the drawings, the levee M side is the front, and the rice field L side is the rear.

[0010] As shown in Figures 1 to 5, the water level adjustment device 1 has a dam plate 2 and a frame body 3 that holds the dam plate 2 so that it can move up and down. As shown in Figure 6, the water level adjustment device 1 is installed in a manhole N, such as a concrete manhole, installed on a slope between a rice field L and a levee M. The water level adjustment device 1 then blocks a certain amount of water from the rice field L and drains it little by little into a drainage channel (not shown) installed inside the levee M.

[0011] The dam plate 2 is a plate-like member with a V-shaped notch on the top when viewed from the front, and blocks a certain amount of water flowing from the rice field L depending on its height, and drains the water from the notch into a drainage channel within the levee M. The dam plate 2 also has a handle 11 to make it easy to lift the dam plate 2. When the water level adjustment device 1 is installed in the manhole N, the rice field L side is filled with soil or the like, so the handle 11 is provided on the dam plate 2 on the levee M side.

[0012] The frame body 3 comprises a frame main body 12 and a pair of guide sections 13, 13 that extend vertically and face each other on both the left and right sides of the frame main body 12. The frame main body 12 is a plate-shaped member that, together with the dam board 2, blocks water from the rice field L. Each guide section 13 is a member that extends from the lower end of the frame main body 12 above the upper end of the frame main body 12, and has a vertical guide groove 15 on the surface facing the other guide section 13. The guide grooves 15, 15 sandwich the left and right ends of the dam board 2, holding the dam board 2 movable up and down with the lower part of the dam board 2 overlapping the upper part of the frame main body 12. The dam board 2 is held so as to be positioned forward of the frame main body 12.

[0013] Furthermore, bolt-made fasteners 16, 16·· for securing the weir plate 2 are provided on the front side of the guide portions 13, 13. The fasteners 16, 16·· press the weir plate 2 against the inner surface of the guide groove 15 from the front so that a gap between the weir plate 2 and the guide groove 15, 15 is created on the front side to prevent water from accumulating in the gap between the weir plate 2 and the guide groove 15, 15, which would impair the function of the weir plate 2 and the frame main body portion 12 to hold back water from the rice field L. Each fastener 16 can be switched between a fixed state in which the weir plate 2 is secured by tightening it, and an unfixed state in which the up and down movement of the weir plate 2 is not restricted by loosening it. In addition, a protrusion 17 is provided on the upper back side of the guide portions 13, 13, which abuts against the wall of the box N to maintain the upright position of the water level adjustment device 1. In this embodiment, a bolt is used as the protrusion 17, and the length of the protrusion 17 is changed according to the size, shape, etc. of the box N.

[0014] The water level adjustment device 1 of the above embodiment has a dam plate 2 and a frame main body 12, and the frame main body 12 is provided with guide parts 13, 13 having guide grooves 15, 15 that hold the dam plate 2 so that it can move up and down, and after the position of the dam plate 2 is determined, the dam plate 2 is fixed by fixing bolt fasteners 16, 16... provided on the guide parts 13, 13. Therefore, it is possible to easily position the dam plate 2 and fix the dam plate 2.

[0015] FIG. 7 is a front view showing a water level adjustment device 1a which is a modified example of the water level adjustment device 1. As shown in FIG. 1 to 6 are given the same reference numerals as in FIGS. 1 to 6, and the description thereof will be omitted.

[0016] In the water level adjustment device 1a, the guide sections 13 are provided with fixing devices 16a, 16a made of butterfly bolts and temporary fixing devices 18, 18... made of bolts. Each fixing device 16a is a member that can be switched between an unfixed state in which it does not interfere with the sheathing plate 2 by loosening it, and a fixed state in which it restricts the up and down movement of the sheathing plate 2 by tightening it. When each fixing device 16a is in the unfixed state, the temporary fixing device 18 presses the sheathing plate 2 against the inner surface of the guide groove 15, 15 with a constant force, holding the sheathing plate 2 so that it can move up and down and can be positioned at any position in the vertical direction. Then, after the position of the sheathing plate 2 is determined, the fixing devices 16a, 16a are fixed to fix the sheathing plate 2.

[0017] According to the water level adjusting device 1a of the above embodiment, the temporary fixing devices 18, 18·· make it easy to finely adjust the position of the dam plate 2, and the fixing devices 16a, 16a can sufficiently fix the dam plate 2.

[0018] The water level adjustment device according to the present invention is not limited to the above-described embodiment, and the overall configuration of the floodgate device as well as the configuration of the pressing portion, etc., can be appropriately modified as needed.

[0019] For example, in this embodiment, the frame body 3 is integrally molded, but the frame main body 12 and the guide portions 13, 13 may be separate bodies.

[0020] Furthermore, in the water level adjustment device 1, a plurality of fixing devices 16 are provided, each of which is a pair of left and right fixing devices, but the number of fixing devices may be changed arbitrarily as long as the dam plate 2 can be fixed sufficiently.

[0021] In addition, in the water level adjustment device 1a, the fixing device 16a is provided on the front side like the temporary fixing device 18, but it may be configured so that only the fixing device 16a is provided on the back side. In this case, the fixing device 16a fixes the dam board 2 by pulling it toward the back side. [Explanation of symbols]

[0022] 1,1a··Water level adjustment device, 2··Weir board, 3··Frame body, 11··Handle portion, 12··Frame main body portion, 13··Guide portion, 15··Guide groove, 16,16a··Fixing device, 17··Protrusion portion, 18··Temporary fixing device.

Claims

1. A water level adjustment device installed in a box between a rice field and a levee, The system includes a dam plate with a V-shaped notch at the top that adjusts the amount of water to be blocked depending on the height at which it is installed, and a frame body that holds the dam plate so that it can move up and down. The frame body comprises a plate-shaped frame main body portion and a pair of guide portions disposed opposite each other on both the left and right sides of the frame main body portion, extending from the lower end of the frame main body portion upward beyond the upper end of the frame main body portion, and each having a guide groove in the up-down direction on the opposing surface; The sheathing board is held in a vertically movable manner with its left and right ends sandwiched between the guide grooves of each of the guide parts, with its lower part overlapping with the upper part of the frame main body part; A water level adjustment device characterized in that each guide section is provided with a fixing device that can be switched between a fixed state in which the weir plate is pressed against the inner surface of the guide groove and fixed, and an unfixed state in which the weir plate's up and down movement is not restricted.

2. The water level adjustment device described in claim 1, characterized in that each guide section is provided with a temporary fixing device that holds the weir plate so that it can move up and down and be positioned at any position in the vertical direction by pressing the weir plate against the inner surface of the guide groove when the fixing device is in an unfixed state.

3. A water level adjustment device as described in claims 1 and 2, characterized in that it has a protrusion provided on the frame body on the opposite side of the fixing device, which abuts against the manhole to maintain the water level adjustment device in an upright position.

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