JPH0735855Y2 - Fixing device for flexible bag-like weir - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing device for fixing the overlapping portion of a flexible bag-like weir installed in a river or the like to the riverbed side.

[0002]

2. Description of the Related Art As shown in FIG. 2, a river is provided with a flexible bag-like weir 11 which crosses the river channel and defines an upstream side 9 and a downstream side 10 to form an appropriate weir height. Flexible bag-like weir 11
The flexible sheet 11a is rolled to form a space 14 inside, and the overlapping portion 13 is formed in the river bed 6
It is fixedly placed on the side. The weir height is adjusted by the amount of air or water inserted into the space 14. The space 14 needs to be sealed in order to maintain the weir height. Therefore, the fixing device 1 is arranged in the overlapping portion 13. The fixing device 1 requires the function of maintaining the airtightness and watertightness of the flexible bag-shaped weir 11 as described above, and the external force applied to the flexible bag-shaped weir 11 by the pressure of the water flowing in the river. It is necessary to have a clamping force that sufficiently withstands the above. As the fixing device 1, those having various structures have been conventionally used. Examples of known techniques include those disclosed in Japanese Utility Model Publication No. 47-25136, Japanese Utility Model Publication No. 47-25669 and Japanese Utility Model Publication No. 58-53306.

The "mounting metal fitting for dam body" disclosed in Japanese Utility Model Publication No. 47-25136 has a round bar arranged on a mounting board fixed to the riverbed, and a clamp having a hanging strip and a projecting edge. The overlapping portion of the dam body is sandwiched between the round bars. The "fixing device for a flexible thin-plate structure" of Japanese Utility Model Application Laid-Open No. 47-25569 discloses a mountain-shaped portion in contact with the surface of the ground block, and a fastening member having a concave or convex arc-shaped engaging surface. An inflexible plate having an engaging surface of a shape that is fixed to the ground block side and coincides with the engaging surface is provided, and the overlapping portion of the flexible thin piece is sandwiched between the plate and the fastening member, and the mountain portion is used as a base point. The lock nut is screwed to the support column to perform tightening. In addition, 58
The "bag-like weir clamp device" of Japanese Patent No. 53306 discloses a clamp hardware having a protrusion fulcrum abutting the riverbed on the upstream side and a groove having a side wall with an arcuate cross section and a flat upper wall on the downstream side. Consisting of a round bar provided on the riverbed side,
The overlapped portion of the bag-like weir is clamped between the groove and the round bar, and the overlapped portion is tightened by tightening with a bolt with the protruding fulcrum as a base point.

[0004]

The above-mentioned known techniques have their respective characteristics, and are ones that maintain the airtightness and watertightness of the bag-like weir and have a clamping force that can withstand an external force. However, each of the clamp, the clamp member and the clamp metal member has a special shape, resulting in high cost. Further, although the overlapping portion is held between the clamp and the round bar, it is difficult to exert a sufficient tightening force unless the shape and the engaging position of both are matched. It is also difficult to do the work. On the other hand, when fixing the polymerized portion by a general simple and inexpensive tightening means, a strong tightening force is required to maintain airtightness and watertightness. Therefore, there is a problem that the overlapping portion of the bag-like weir made of a flexible material such as rubber is damaged, deteriorated, or aged.

The present invention solves the above problems, and a large clamping force can be obtained by a relatively small tightening force so that the overlapping portion can be reliably fixed, and the installation work is easy and inexpensive to carry out. An object of the present invention is to provide a fixing device for a flexible bag-like weir that does not cause damage, deterioration, or aging of a flexible sheet.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to roll a flexible sheet to form an internal space and to polymerize both ends of the flexible sheet to keep the space hermetically closed. A fixing device for fixing the overlapping portion of a flexible bag-like weir installed across a river to a river bed or the like, which is a taper groove type that is fitted and fixed in a taper groove of a river bed that narrows and slopes downward. A deposit and a retainer that abuts on the upper surface side of the overlapped portion pushed into the taper groove type deposit and holds the overlapped portion with the taper groove type deposit, and is embedded on the riverbed side. Fixed, equipped with anchor bolts and nuts for penetrating the taper groove type metal deposit, the overlapping portion and the pressing tool to press them toward the riverbed, and the contact portion of the pressing tool with the overlapping portion is Angle slightly smaller than the taper of taper groove type metal deposit And it constitutes a fixing device for a flexible bag-like weir over tapered surface is formed.

[0007]

The overlapping portion of the flexible sheet is pushed into the taper groove of the taper groove type metal deposit. The retainer is inserted into an anchor bolt protruding through the tapered groove type metal deposit and the overlapped portion, and abuts on the upper surface side of the pushed overlapped portion. By tightening the nut screwed to the anchor bolt, the overlapping portion is held between the retainer and the taper groove type deposit. Since the presser is formed with a taper surface having an angle slightly smaller than that of the taper groove of the taper groove type metal deposit, the overlapping portion is tightened with a relatively small tightening force due to the wedge action between both taper surfaces. Further, the pressing tool has a simple structure having only a tapered surface and can be implemented at a low cost. Further, the tightening of the overlapped portion is only required to tighten the anchor bolts and nuts so as to press the holding tool against the overlapped portion, and the installation work is extremely easy.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an axial sectional view of the fixing device of this embodiment.

As shown in FIG. 1, the fixing device 1 is roughly divided into a taper groove type metal deposit 2, a retainer 3, anchor bolts, nuts 4 and 5, and the like. A taper groove 15 narrowing downward is provided between the upstream riverbed 7 of the riverbed 6 and the downstream riverbed 8 which descends from the upstream riverbed 7. Taper groove 15
A taper groove type metal deposit 2 having a taper surface 16 following the taper of the taper groove 15 is fitted and fixed therein. The taper groove type deposit 2 is arranged so as to extend in a direction perpendicular to the paper surface along the river, and the flange portions 17 and 18 on the upper surface side are buried along the upstream river bed 7 and the downstream river bed 8. On the other hand, the anchor bolt 4 is embedded in the river bed 6, the threaded portion 19 of the anchor bolt 4 penetrates the taper groove type deposit 2, and the screw end is extended to a position substantially equal to the upstream river bed 7 and arranged along the vertical direction. It

The retainer 3 is composed of elongated block bodies arranged in opposition to each other along the longitudinal direction of the taper groove type metal deposit 2, and has a cross-sectional shape shown in FIG. Tapered surfaces 20 and 20 narrowing downward are formed on both side surfaces, and flat surfaces 22 and 21 are formed on the upper and lower sides. Further, an arcuate portion 23 is formed at the intersection of the lower flat surface 21 and the tapered surface 20. Further, a through hole 24 through which the anchor bolt 4 penetrates and a recess 25 in which the nut 5 is housed are formed in the central portion thereof. The taper angle of the taper surface 20 is formed to be slightly smaller than that of the taper surface 16 of the taper groove type deposit 2. This is because the wedge action is generated between both surfaces due to the difference in taper angle between the tapered surfaces 16 and 20.
The angle difference is preferably determined experimentally with reference to the size of the flexible bag-like weir 11 used, the flow velocity of the river, and the like.

Next, a method of fixing the overlapping portion 13 of the flexible bag-like weir 11 by the fixing device 1 having the above structure will be described. First, the overlapping portion 13 of the flexible bag-like weir is pushed into the taper groove type deposit 2, and the tip portion thereof is turned to a level position substantially the same as the upstream riverbed 7. The overlapping part 13 opens on the downstream side,
One flexible sheet 11a is arranged along the surface of the downstream riverbed 8, and the other flexible sheet 11a is arranged upright as shown. In addition, a through hole through which the anchor bolt 4 penetrates is previously formed at an appropriate position of the overlapping portion 13. Next, the through hole 24 of the retainer 3 is inserted into the anchor bolt 4
While being inserted into the screw portion 19, the flat surface 21 therebelow is brought into contact with the overlapping portion 13. In this state, the flat surface 22 above the presser foot 3 is arranged at substantially the same level position as the upstream river bed 7. When the nut 5 is screwed onto the screw portion 19 of the anchor bolt 4 and tightened, the presser tool 3 is moved to the overlapping portion 1.
It is pressed to the 3 side. In addition, the nut 5 is the recess 2 of the retainer 3.
It is housed in the inside 5 and does not protrude from the upper flat surface 22.

Next, the operation of this embodiment will be described. By tightening the nut 5, the overlapping portion 13 interposed between the tapered surface 16 of the taper groove type deposit 2 and the tapered surface 20 of the retainer 3
Is tightened. As described above, both tapered surfaces 16 and 2
Since 0 has a difference in angle, a wedge force is generated between both surfaces, and the overlapping portion 13 is sufficiently tightened with a relatively small tightening force. On the other hand, the lower flat surface 21 of the retainer 3 also presses the overlapping portion 13 abutting against the lower flat surface 21.
Since the overlapped portion 13 interposed between 6 and 20 is first tightened, a slight gap 26 may be formed between the lower surface side of the overlapped portion 13 and the bottom surface of the tapered groove type metal deposit 2. However, since the overlapping portion 13 is sufficiently tightened between the tapered surfaces 16 and 20, there is no particular problem, and since there are few tightening points, deterioration and aging can be prevented. Further, since the pressing member 3 is formed with the arcuate portion 23, a concentrating force does not act on the overlapping portion 13 side, and smooth tightening is performed. As described above, the overlapping portion 13 is securely tightened so that the flexible bag-like weir 11 can be kept secret and watertight, and can sufficiently withstand the water pressure acting on the flexible bag-like weir 11.

As shown in the drawing, the pressing member 3 has a simple structure in which tapered surfaces 20 and 20 are formed on both sides, and the tapered groove type metal deposit 2 also has a simple structure as shown in the drawing. Further, the clamp of the overlapping portion 13 only needs to tighten the nut 5 with a relatively small force. Therefore, the installation work can be performed extremely easily.

[0014]

According to the present invention, the following effects can be obtained. 1) By adopting a structure in which a wedge action is generated between the taper groove type metal deposit and the retainer, the overlapping portion of the flexible bag-like weir can be securely tightened with a relatively small tightening force. Thereby, the airtightness and watertightness of the flexible bag-like weir can be maintained. 2) Since a sufficient clamping force is generated due to the wedge effect,
There is no slack in the overlap due to water pressure in the river. 3) The overlapping portion can be fixed only by tightening the nut screwed with the anchor bolt with a comparatively small force, and it is extremely easy to perform. This reduces the installation work time. 4) Both the retainer and the taper groove type metal deposit have an extremely simple structure, and can be implemented easily and inexpensively. 5) Since there is no local pressure part in the overlapping part, damage, deterioration and aging are prevented.

[Brief description of drawings]

FIG. 1 is an axial sectional view of an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a structure of a flexible bag-like weir and a fixing method thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixing device 2 Tapered groove type deposit 3 Presser tool 4 Anchor bolt 5 Nut 6 River bed 7 Upstream river bed 8 Downstream river bed 9 Upstream side 10 Downstream side 11 Flexible bag-like weir 11a Flexible sheet 13 Overlapping part 14 Space 15 taper groove 16 taper surface 17 collar portion 18 collar portion 19 screw portion 20 taper surface 21 flat surface (lower) 22 flat surface (upper) 23 arcuate portion 24 through hole 25 recessed portion 26 gap

Claims (1)

[Scope of utility model registration request] 1. A superposed portion of a flexible bag-like weir installed by rolling a flexible sheet to form a space inside and superposing both ends of the flexible sheet so as to hermetically maintain the space and crossing a river channel. Is a fixing device for fixing to the riverbed, etc., the taper groove type metal deposit which is fitted and fixed in the taper groove of the riverbed that narrows and slopes downward, and the polymerization pushed into the taper groove type metal deposit. Part that is in contact with the upper surface side of the section and holds the overlapped part with the taper groove type deposit, and is embedded and fixed in the riverbed side, and penetrates the taper groove type deposit, the overlap part and the presser tool. Anchor bolts and nuts for pressing these to the riverbed side are provided, and the contact portion with the overlapping portion of the retainer has a taper surface with an angle slightly smaller than the taper of the taper groove type metal deposit. Fixing of flexible bag-like weir characterized by being formed apparatus.