JPH0461124B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a flexible membrane weir.

[Conventional technology]

As a flexible membrane weir, a tube-shaped envelope is formed from synthetic rubber reinforced with nylon woven fabric, etc., and this is installed transversely on the river bed, and a fluid such as air or water as an expansion medium is placed inside the envelope. Conventionally, there has been known a device in which the fluid is injected to expand and stand up, and the fluid is discharged from the inside of the envelope to contract and collapse (see, for example, Japanese Utility Model Publication No. 57-41219).

The above-mentioned flexible membrane weir has features such as being able to automatically raise and lower more reliably than conventional fixed weirs, being easier to maintain and inspect, and not rusting, and its use has been increasing in recent years.

[Problem that the invention seeks to solve]

Incidentally, in a flexible membrane weir, anti-slip measures are required to ensure safety when walking or working on it for maintenance and inspection. However, in conventional flexible membrane weirs, anti-slip measures have been taken by directly processing or molding anti-slip irregularities on the surface of the flexible membrane envelope itself.

However, this method has the following problems.

(1) Since it is necessary to provide unevenness and maintain the required strength, the flexible membrane becomes thick and is not economical.

(2) The uneven parts are easily worn down by the sediment flowing down the river, and the wear and tear of the uneven parts will end the life of the weir.

(3) When standing up, the elongation is different between the concave and convex parts, and the convex part is the outermost surface, so it stretches more, and it deteriorates faster due to the influence of direct sunlight.

(4) In general, flexible membrane weirs are required to have a service life of 20 to 30 years or more, so unlike general-purpose rubber, durable rubber, that is, expensive rubber, is used as the flexible membrane. However, it is uneconomical to form the anti-slip uneven portion with such a material.

(5) If floating objects in the river contain sharp objects, the flexible membrane itself, including its uneven parts, is likely to be damaged.

[Means for solving problems]

In order to solve the above-mentioned problems, this invention has a band-shaped flexible sheet mixed with an anti-slip material such as granules or short fibers over the entire length of the envelope, and the top and front and rear surfaces of the top when expanded. It has a structure in which it is laminated over an area that covers the area.

〔Example〕

The flexible membrane weir of the embodiment shown in FIGS. 1 and 2 has a tube-shaped envelope 1 formed of a rubber sheet made of synthetic rubber reinforced with nylon woven fabric, etc. One side is attached to the river bed 2,
The mounting portion 3 is fixed to the river bed 2 with bolts 5 via a clamp bar 4. When air or water is injected into the envelope 1, it stands up as shown in FIG.
Moreover, when these are discharged, they lie flat as shown in FIG.

In the case of the above embodiment, there are river banks at both ends of the envelope 1.
A connecting portion 7 that is fixed to a structure 6 such as a riverbed (see Fig. 5) is integrally formed, but this connecting portion 7 may be constructed from a separate member, or the connecting portion 7 may not be provided. Both ends of the envelope 1 may be kept watertight and directly applied to the construct 6.

As shown in FIG.
It is attached to the area that covers the top and the front and back surfaces of the top when it expands. The flexible sheet 8 is a rubber sheet mixed with an anti-slip material such as particles or short fibers. This anti-slip material includes metals such as stainless steel, metal oxides such as alumina, natural minerals,
Sand such as silica sand, glass and organic materials such as nylon and Kevlar (trademark) can be used. Moreover, as shown in FIG. 3, the method of mixing may be uniform, or as shown in FIG. 4, it may be mixed only in the surface layer.

The above-mentioned flexible sheet 8 may be formed on the entire surface of the envelope 1 except for the bottom surface or including the bottom surface, as shown by the dashed line in FIG. Further, when the connecting portion 7 is integrally formed as shown in FIG. 5, the fold 9 portion is omitted.

〔effect〕

As described above, in this invention, a flexible sheet containing an anti-slip material is laminated over the entire length of the envelope, and also over a range that covers the top and the surfaces before and after the top when it expands. This can prevent slipping when walking on a weir or working on a weir, as well as prevent lacerations and other damage caused by floating objects or human actions.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the device in the lying down state, FIG. 2 is a sectional view of the device in the upright state, FIGS. 3 and 4 are partially enlarged sectional views, and FIG. 5 is a perspective view of the device in use. DESCRIPTION OF SYMBOLS 1... Envelopment, 2... River bed, 3... Mounting part, 8... Flexible sheet.

Claims (1)

[Claims] 1. A flexible membrane that forms a weir and is attached to at least a riverbed, the interior of the envelope is filled with fluid as an expansion medium to expand and stand up, and the fluid is discharged from the interior of the envelope to cause the membrane to contract and fall down. In weir construction, a flexible sheet mixed with an anti-slip material such as granules or short fibers is laminated over the entire length of the envelope, covering the top and the surfaces in front and behind the top when it expands. Features a flexible membrane weir.