JPS61183512A - Fastening structure of flexible film weir - Google Patents

Abstract

PURPOSE:To facilitate a fastening work of a rise and fall weir, by a method wherein a number of convex and concave shapes are provided in the nipping surface of at least a press metal out of a filling metal and a press metal. CONSTITUTION:Two edges parts 15 of a rubber weir body 14 are supperposed with each other on a filling metal 16 through which a filling bolt 20 is inserted and which is filled in a river bed concrete 10, and after a press metal 22 is supperposed therewith along the upper surface, a nut 24 is threadly joined with a bolt 20. This improves the fiction factor of the surface of the press metal 22 with the edge part 15 by means of a number of line grooves 23 formed in the under surface of the press metal 22, resulting in the possibility to reliably seal and fasten the rubber weir body 14 and to perform a fastening work by means of a low force.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an undulating weir made of a flexible membrane, commonly referred to as a rubber ring, which is installed across a river, for example, for the intake of agricultural water. It is.

Ryoumai Wataru Expands and stands up by supplying and discharging fluids such as air and water.
Flexible membrane undulating weirs that contract and collapse are easy to construct and inexpensive to manufacture, and are widely used for purposes such as intake of agricultural water.

FIG. 6 shows a rubber ring 01 as an example.
This rubber weir body o2 includes a planting metal fitting 04 provided along the surface of the river bed concrete 03, a plurality of planting bolts 05 penetrating the planting metal fitting 04 and arranged at intervals, and the planting bolt o5. Natsu who is screwed together. 6 and a holding metal fitting 01, it is fixed to the surface of riverbed concrete 02 in an air-watertight manner. The implantation metal fitting 04 and the holding metal fitting 07 have a corrugated cross-sectional shape in order to improve their clamping force.
As a result, the entire upstream edge of the rubber weir body 02 is bent and pinched.

However, in order to further improve the clamping force by the implantation fitting o4 and the presser foot member 07, the shape of the inner fitting should be changed to a sufficiently large b/a as shown in Fig. 7. However, it is effective to make b/a thicker (if this is done, the frictional force between the inner fitting and the rubber weir body 02 will increase accordingly, and the rubber weir body o2 will be tightened while giving it a bent shape. It is difficult to perform the task,
In particular, as the rubber ring becomes larger and the thickness of the rubber membrane forming the rubber weir body increases, manual tightening becomes impossible.

Also, as b/a increases, the angle θ of the hook fitting 04.07
If the angle approaches an acute angle, there is a risk that the rubber film forming the rubber dam body will break.

. An object of the present invention is to increase the coefficient of friction between the fixing fittings of a flexible membrane undulating weir and the membrane forming the body of the undulating weir, and at the same time to improve the fastening work using the fixing fittings. The point is to make it easier.

This purpose is to improve
This is achieved by providing at least a large number of concave and convex shapes on the clamping surface of the presser fitting to increase the coefficient of friction.

With such a configuration, the flexible membrane undulating weir body can be securely and tightly sealed without having to impart a very large wave shape to the fixing fittings, and the tightening work can be done with a relatively small force. It becomes possible to do so.

Friend 1 Hereinafter, one embodiment of the present invention shown in FIGS. 1 and 2 will be described.

FIG. 1 shows a rubber ring 12 attached to the surface of a riverbed concrete 10 across a river as a longitudinal sectional perspective view of the main part,
FIG. 2 shows an enlarged view of the main part. The planting fitting 16, which is planted along the surface of the riverbed concrete 10 in the direction of crossing the river, is a long belt-like body with two parallel raised stripes 18 having a corrugated cross section. Spaced stud bolts 20 pass through the widthwise center of the ridge 18.

Then, both end edges 15 of the rubber weir body 14 in which the rubber membrane is folded in half are superimposed on the planting metal fitting 16, and a long holding metal fitting 22 having the same shape as the planting metal fitting 16 is placed along the upper surface thereof. are overlapped, and the nut 24 is screwed onto the planting bolt 20 with the planting bolt 20 penetrating the end edge 15 and the holding fitting 22, and the end edge 15 passes through the planting fitting 16 and the holding fitting 22. is sandwiched between.

A large number of grooves 23 along the longitudinal direction are knurled on the clamping surface (i.e., the lower surface) of the presser metal fitting 22.
rling tool), and the coefficient of friction (
The aim is to improve the flow direction of the river. In addition, groove 2
The groove depth of No. 3 is preferably about 2 to 3jI11.

The rubber ring 12 is configured as described above, and the presser metal fitting 2
Even if the waveform of 2 is formed loosely, the holding force against the end edge 15 of the presser fitting 22 in which the grooves 23 are formed is large, and as shown in the figure, the rubber dam body is expanded and erected by filling with air. 14, the upstream side wall 14a can withstand a large tension force with a margin,
There is no stress on the bolt insertion hole in the rubber weir body 14, and there is no risk of air leakage or rubber ring 12 due to breakage of the rubber weir body 14.
destruction is effectively prevented.

In addition, by forming the waveform of the presser metal fitting 22 loosely,
The end edge portion 15 is not bent and deformed into an unreasonable shape, and the nut 24 can be screwed onto the planting bolt 20 with a smaller force than in the conventional case.

FIG. 3 shows a modification, in which a large number of grooves 23A are formed along the longitudinal direction not only on the clamping surface of the holding fitting 22 but also on the clamping surface (i.e., the upper surface) of the planting fitting 16A. . By doing so, the holding force of the implantation metal fitting 16A to the end edge 15 can be improved while making the waveform of the implantation metal fitting 16A gentle, and it is possible to expect an effect superior to that of the embodiment described above.

Incidentally, the irregularities formed on the holding metal fitting and the implanting metal fitting are not limited to the grooves 23, 23A as in each of the above embodiments, but may include a large number of small protrusions 26, as shown in FIGS. 4 and 5. Alternatively, mesh-like grooves 28 may be formed.

1 and 11 As is clear from the above explanation, among the planting metal fittings used to fix the main body of the flexible membrane undulating weir and the holding metal fittings that cooperate with the planting metal fittings, at least a large number of the holding metal fittings are attached to the clamping surface of the holding metal fittings. A fastening structure for a undulating weir made of flexible S material was proposed, which has an uneven shape.

If such a configuration is adopted, it is possible to maintain a large holding force against the undulating weir body while making the waveform shape applied to the holding metal fittings or facility fittings gentle, and the tightening work by the fixing metal fittings can be performed with a small force. At the same time, it is possible to prevent damage to the undulating weir body and ensure its reliable sealing.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional perspective view of the main part of a rubber weir according to an embodiment of the present invention, Fig. 2 is an enlarged view of the main part, Fig. 3 is a diagram showing a modification thereof, @ Fig. 4, and Fig. 5 are FIG. 6 is a longitudinal sectional view of a main part of a known rubber dam, and FIG. 7 is a sectional view showing a fixing fitting in the rubber dam. 10...River bed concrete, 12...Rubber weir, 14
...Rubber weir body, 15... Edge portion, 16... Planting fitting, 18... Raised strip, 20... Planting bolt, 22
... Holder metal fitting, 23... Groove, 24... Nut.

Claims (1)

[Scope of Claims] A flexible membrane material that is clamped and fixed between a planting fitting and a holding fitting by a threaded relationship between planting bolts and nuts spaced apart from each other along the river bed surface. A fastening structure for an undulating weir made of a flexible film, characterized in that, in the undulating weir, at least the clamping surface of the holding fitting is provided with a large number of concave and convex shapes to increase the coefficient of friction.