JP4132065B2 - Sinking - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to sedimentation for protecting riverbanks or riverbeds.
[0002]
[Prior art]
In order to prevent river scouring, a method of protecting a river by installing a sink on the riverbank or riverbed is conventionally known.
In the past, sinking by masonry and concrete blocks was often installed, but this made the landscape worse and the waterside creatures were difficult to survive.
Therefore, in recent years, wooden sinking is often used as a sinking that protects waterside creatures and landscapes and is friendly to the natural environment.
[0003]
As wooden sinking, what is generally used is one in which logs are assembled in a cross-beam shape and stones such as cobblestones are used therein (see, for example, Patent Document 1 and Patent Document 2).
An example of conventional sinking is shown in FIG.
In sinking, logs 1 are assembled in a cross-beam shape to provide a plurality of frames 2, and stones 4 such as cobblestones are arranged inside the frames 2.
[0004]
[Patent Document 1]
JP 2000-282437 A [Patent Document 2]
Japanese Patent Laid-Open No. 2001-40636
[Problems to be solved by the invention]
However, even if water is present above the subsidence during the flooding period in the conventional subsidence, water may be present only between the stones during the drought period.
In such a case, in the conventional sinking, if it is a small fish, it can survive in the gap between stones, but there is no gap that allows a larger fish to pass through the gap between stones and stones. I can't survive.
Moreover, in the conventional sinking, it may be a dwelling that becomes a fish nest that is a living space for aquatic organisms such as fish, regardless of the season of water increase or drought.
As described above, in the conventional sinking, there is a problem that even if it is a wooden sinking that is kind to the natural environment, aquatic organisms have not been reliably protected.
[0006]
Therefore, the present invention is made to solve the above-mentioned problems, and the object of the present invention is that aquatic organisms such as fish can survive even in the drought season, and when installed on the riverbank regardless of the flooding or drought season The purpose is to provide a sink that can be used as a fish nest.
[0007]
[Means for Solving the Problems]
The present invention has the following configuration in order to achieve the above object.
That is, according to the subsidence according to the present invention, a plurality of stones are arranged inside, and in the subsidence installed on the riverbank or the riverbed, a plurality of pillars extending in the vertical direction are connected to the respective pillars. It is composed of a transverse member that extends in the lateral direction and is attached to each pillar member, and has a polygonal storage portion in plan view that can store stones inside, and each pillar member has a polygonal shape of the formed storage portion. A plurality of frames are provided so as to be inscribed inside each vertex, a stone is stored in a storage portion of each frame, and a plurality of the cross members are provided in a vertical direction at a predetermined interval. It is arranged so that the cross members of a plurality of frames are in contact with each other, and the parts arranged so that the cross members are in contact with each other are connected by arranging a plurality of frames to form a fishway or fish in a grid pattern It is formed as a nest, the crossmember, at least any one of the frame, transverse And two connecting portions, and characterized in that arranged alternately and a portion provided with crosspiece only one in the vertical direction.
By adopting this configuration, only by arranging the frame bodies side by side, a gap is formed between the adjacent frame bodies so that the cross member is arranged, so that this gap can be used as a fishway or a fish nest. In other words, fish can survive even in the drought season, and can be used as a fish nest when installed on the riverbank regardless of the season of drought or drought.
Moreover, since the said cross member is provided with two or more up-down directions at predetermined intervals, the strength maintenance of a frame can be further aimed at.
Further, the cross member is formed by alternately arranging a portion in which at least any one frame body is connected in the horizontal direction and a portion in which only one cross member is provided in the vertical direction. By arranging a frame having only one horizontal member in the horizontal direction so that the horizontal members are in contact with each other, one horizontal member is placed above or below the fishway or fish nest. As a result, a fishway or fish nest partially extends in the vertical direction.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is a perspective view of a unit structure in sinking of the first embodiment, FIG. 2 is a front view of sinking, and FIG. 3 is a plan view of sinking.
The sinking according to the first embodiment is configured by installing a plurality of unit structures 10.
The unit structure 10 includes two wooden pillar members 11 and 11 and two wooden cross members 12 and 12. The column member 11 and the cross member 12 may be attached by bolts and nuts (not shown).
As the shapes of the column member 11 and the cross member 12, it is preferable to use a so-called log having a circular cross section. As logs, thinned wood such as larch can be used.
[0009]
The unit structures 10a and 10b are arranged in pairs so that the cross members 12 are in contact with each other. Stones 14 are arranged on the side of the unit structures 10a and 10b where the cross member 12 is not provided and on the side where the unit structure is not provided adjacent thereto. That is, the unit structure 10 is installed as a plurality of stone partitions.
In the present embodiment, the unit structure 10c is also disposed at a position facing the portion where the stone 14 is disposed. In this way, the stone 14 can be held between the unit structure 10c and the unit structure 10a or the unit structure 10b, and the stone can be prevented from collapsing in the width direction in FIGS.
[0010]
2 and 3, only the part where the portion where the stone 14 is arranged is held by two unit structures is described. However, if the entire periphery of the stone 14 is surrounded by the unit structure 10, Further, it is more preferable because the stone 14 does not collapse in a direction perpendicular to the paper surface.
[0011]
Since the unit structures 10a and 10b are arranged so that the cross members 12 are brought into contact with each other, a portion where the stones 14 are not arranged by the length of the two cross members 12 is formed. This is the fishway 16 (which also serves as a fish nest, but will be described as a fishway hereinafter).
Even when the water surface descends from the upper surface of the stone 14 during the drought period, the fish passage 16 is sufficiently free of fish because the stone 14 is not provided.
In the embodiment of FIGS. 2 and 3, four cross members 12 are provided in each unit structure 10 in the vertical direction, so that the fishway 16 is provided between a plurality of cross members 12. Three will be formed. However, if the water surface in the dry season is just below the top surface of the stone 14, the space 17 above the upper cross member 12 can also be a fishway, and the water surface in the dry season is lowered to about the lower cross member 12. If so, the space 19 below the lower cross member 12 can also be a fishway.
[0012]
The stone 14 may be packed up to a height such that the upper surface A is disposed above the upper surface B of the cross member 12 provided at the uppermost position.
By setting the height of the stone 14 to such a height, the water accumulated on the upper surface of the stone 14 can be poured into the side where the cross member 12 is provided in the dry season, Water can be secured and less water can be used effectively.
[0013]
The number of cross members 12 in the unit structure 10 is not limited to the number described above. That is, the number of cross members 12 may be one, or four or more.
[0014]
Furthermore, as shown in FIGS. 4 and 5, in one unit structure 10, a plurality of cross members 12 may be connected in the horizontal direction to widen the fishway 16.
In FIG. 4, the unit structure 10a located on the right side has a configuration in which two cross members 12a are connected in the horizontal direction. The unit structure 10a having a configuration in which two cross members are connected in the horizontal direction and the unit structure 10b in which only one cross member 12b is provided in the horizontal direction are brought into contact with each other. By arranging in such a manner, the fishway 16 has a width corresponding to three cross members, and a wide fishway can be secured.
[0015]
Moreover, in FIG. 5, the unit structure 10a located on the right side has a portion in which two cross members 12a are connected in the horizontal direction and a portion in which only one cross member 12a is provided alternately in the vertical direction. I try to arrange it.
By disposing the unit structure 10a and the unit structure 10b, in which only one cross member 12b is provided in the lateral direction, so that the cross members are in contact with each other, above or below the fishway 16 A gap 21 corresponding to one cross member is generated. The presence of the gap 21 causes the fishway 16 to partially expand in the vertical direction.
As described above, even when a plurality of cross members are connected in the horizontal direction, the vertical width of the fishway 16 is partially expanded by changing the number of cross members with the cross members arranged vertically. It can contribute to the improvement of living environment.
[0016]
(Second Embodiment)
Next, a description will be given of sinking where a fishway can be secured with a frame that combines a pillar material and a cross member instead of a unit structure that combines a pillar material and a cross member, with reference to FIGS.
The frame 30 is formed in a polygonal shape in plan view, but in the example shown here, it is formed in a square shape in plan view.
A stone 14 is arranged inside the frame.
[0017]
The frame 30 includes four column members 31, 31... That extend in the vertical direction at positions corresponding to the apexes of the squares, and the horizontal members 32, 32. It consists of and.
A plurality of cross members 32 are also provided in the vertical direction to connect the column members 31.
In addition, although the material is standardized when the log with the same diameter is used for the column material 31 and the cross member 32, since it will be convenient, it is not limited to using the log with the same diameter in particular.
[0018]
Next, a method for attaching the column member 31 and the cross member 32 will be described.
The column member 31 and the horizontal frame 32 are attached by bolts 33 and nuts 34 at each vertex of a square formed by the frame.
At each apex, the mounting holes 35 are formed in the cross members 32 and the column members 31 so as to pass through the two cross members 32 and the column members 31 arranged so as to be inscribed in the two cross members 32. The bolt 33 is inserted into the mounting hole 35, and the three logs are integrally attached.
[0019]
The attachment hole 35 is drilled at an angle of 45 degrees with respect to the axial direction of the cross member. In this way, the mounting hole 35 into which the bolt 33 is inserted at an angle of 45 degrees is formed in the horizontal frame that is square, so that the mounting can be made with the diameter of the column 31 and the shortest bolt length. Yes, it can be firmly attached.
In addition, by attaching the column member 31 and the cross member 32 at an angle of 45 degrees or the like in this way, the distance x from the end 32a of the cross member 32 of the attachment hole 35 can be made larger than before. it can.
For this reason, it is possible to prevent a crack or a crack from the end portion 32a from extending toward the attachment hole 35 and damaging the attachment hole 35. Moreover, since the bolt 33 is attached in the direction with respect to the disassembly direction of the frame 30, even if the nut 34 is removed, the bolt 33 is provided so as not to come off due to resistance.
[0020]
A plurality of bottom members 36 are arranged on the upper surface of the lateral member 32 located at the lowest position. The plurality of bottom members 36 form a bottom surface in the frame 30. The bottom member 36 is attached to the installed horizontal member 32 by a metal fitting (not shown) such as a grazing.
Since the bottom material 36 is provided and the stone 14 is stacked on the top surface of the bottom material 36, the weight of the stone 14 is applied to the frame body 30, and the frame body 30 can be installed at a predetermined position by this weight.
[0021]
The sinking is configured by using a plurality of frame bodies 30 having such a structure. A gap is formed in the formed floor when the cross members 32 of the adjacent frame bodies 30 are in contact with each other. Since no stones 14 are provided in the gap, a fishway 16 that is a passage through which fish can survive is formed.
[0022]
Further, as shown in FIG. 8, by arranging a plurality of frame bodies 30, the gaps are connected to form the fishway 16 in a grid pattern.
By adopting such a configuration, it is possible to form a fishway simply by placing the frame 30 on the river bed, and when it is installed on the riverbank, it forms a fish nest space regardless of the season of water increase or drought. it can.
[0023]
Moreover, as shown in FIG. 9, the number of the horizontal members 32 is not limited to one for each frame body 32, but two horizontal members 32 connected in the horizontal direction. There may be.
In this figure, the frame 30a located on the right side has a configuration in which at least two cross members 32a on the side adjacent to the frame 30b are connected in the horizontal direction. As described above, the frame 30a having the configuration in which the two horizontal members are connected in the horizontal direction and the frame 30b in which only one horizontal member 32b is provided in the horizontal direction are brought into contact with each other. By arranging in this manner, the fishway 16 has a width corresponding to three transverse members, and a wide fishway can be secured.
Moreover, as the frame 30a, the side which is not adjacent to the frame 30b may be configured by connecting two cross members 32a in the horizontal direction, but connecting two or more cross members is a wide fishway. Since there is no effect other than ensuring the above, it is not particularly necessary to provide a configuration in which two cross members 32a are connected in the horizontal direction in a portion where there is no adjacent frame.
[0024]
Furthermore, a structure as shown in FIG. 5 may be adopted for the frame 30 (not shown).
According to this configuration, in the frame body, a portion in which two cross members are connected in the horizontal direction and a portion in which only one cross member is provided are alternately arranged in the vertical direction.
By arranging this frame body and a frame body in which only one cross member is provided in the horizontal direction so that the cross members are in contact with each other, the cross member 1 is located above or below the fishway. A gap corresponding to this occurs. Due to the existence of this gap, the fishway partially extends in the vertical direction.
[0025]
Even in the frame body 30 of the present embodiment, the stone 14 is packed up to such a height that the upper surface A is disposed above the upper surface B of the cross member 32 provided at the uppermost position. (See FIG. 9).
By setting the height of the stone 14 to such a height, the water accumulated on the upper surface of the stone 14 can be poured into the side where the cross member 32 is provided in the drought period, Water can be secured and less water can be used effectively.
[0026]
In the subsidence of the first embodiment and the subsidence of the second embodiment described above, only the case where wooden logs are used as the cross member and the column member has been described, but other materials such as concrete are used. May be. Moreover, you may use a square material and a Thai material for a shape. Further, even when logs are used, those having different diameters may be used for the cross member and the column member.
[0027]
As described above, the present invention has been variously described with reference to preferred embodiments. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the invention. is there.
[0028]
【The invention's effect】
According to the present invention, since the cross members of the adjacent unit structures or the cross members of the frame are arranged to contact each other, a gap is formed between the adjacent unit structures or frames. Since this gap functions as a fishway, fish can survive even in the dry season. Moreover, if it is installed on the riverbank, the gap functions as a fish nest regardless of the season of water increase or drought.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a place where two unit structures constituting a subsidence according to the present invention are arranged.
FIG. 2 is a front view of the first embodiment of sinking according to the present invention.
FIG. 3 is a plan view of the sinking shown in FIG.
FIG. 4 is an explanatory view showing another embodiment of the arrangement of the cross member.
FIG. 5 is an explanatory view showing another embodiment of the arrangement of the cross member.
FIG. 6 is a plan view showing a place where two frames constituting the subsidence according to the present invention are arranged.
FIG. 7 is a front view of a second embodiment of sinking according to the present invention.
FIG. 8 is a plan view of sinking when a plurality of frames are arranged.
FIG. 9 is a front view of another form of sinking regarding the arrangement of cross members.
FIG. 10 is a plan view for explaining a conventional sinking.
[Explanation of symbols]
10 Unit structure 11 Pillar 12 Cross member 14 Stone 16 Fishway (fish nest)
17, 19 Space 21 Clearance 30 Frame 31 Column material 32 Cross member 33 Bolt 34 Nut 35 Mounting hole 36 Bottom material

Claims (1)

In the subsidence where a plurality of stones are placed inside and installed on the riverbank or riverbed,
A polygonal shape in plan view that is composed of a plurality of pillars that extend in the vertical direction and a transverse member that extends in the lateral direction so as to connect the pillars and is attached to the pillars, and that can store stones inside. A plurality of frames arranged so as to be inscribed inside each vertex of the polygon of the formed storage portion,
Stone is stored in the storage part of each frame,
A plurality of the cross members are provided in the vertical direction at a predetermined interval ,
It is arranged so that the cross members of the plurality of frames are in contact with each other,
The parts arranged so that the crosspieces are in contact with each other are formed by arranging a plurality of frames, and are formed as a fishway or fish nest in a grid pattern,
The horizontal member is a sinking bed characterized in that in at least any one of the frames, a portion where two pieces are connected in the horizontal direction and a portion where only one horizontal member is provided are alternately arranged in the vertical direction .

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