JP2007218035A - Rubber bag body for rubber weir - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rubber bag body for a rubber weir for rapidly supplying and exhausting a fluid. <P>SOLUTION: The rubber bag body for the rubber weir is formed of a rubber bag body installed to cross a waterway to form a weir in the waterway and allowing the weir to rise and fall by expansion and contraction by supplying and exhausting the fluid. The internal wall surface of the rubber bag body is formed with recessed or projecting shape to suppress the mutual close contact of the internal wall surfaces. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rubber bag for a rubber weir which is installed so as to cross the water channel so as to form a weir, and is formed by a rubber bag body in which the weir stands up and down by expansion and contraction due to supply and exhaust of fluid. About the body.

Conventionally, the rubber weir has been formed by a rubber bag body, and by supplying a fluid such as air into the rubber bag body to inflate and stand up the rubber bag body, the intake weir of a river or a water channel, etc. It is configured to be used as.
Moreover, when not using as a water intake weir etc., it is comprised so that a fluid can be exhausted from the said rubber-made bag body, and it can fall down.

  Normally, the inner wall surface of the rubber bag body is formed smoothly, and when the fluid inside the rubber bag body is exhausted, the shrinkage starts from the portion near the air supply / exhaust port, and gradually begins from the portion near the air supply / exhaust port. There is a drawback that the smooth inner wall surfaces are in close contact with each other, the vicinity of the air supply / exhaust port is blocked, and the fluid is not exhausted any more.

  In addition, when supplying fluid to the rubber bag body in which the smooth inner wall surfaces are in close contact with each other, it is necessary to apply excessive pressure to the fluid in order to peel off the close contact between the smooth inner wall surfaces, so that the fluid quickly inflates and rises. However, there is a disadvantage that the operation cost is increased.

  In order to solve the above drawbacks, Patent Document 1 describes that a groove communicating with the supply / discharge port is provided on the inner wall surface of the rubber weir.

  However, even when a groove is provided on the inner wall surface, fluid is easily supplied and exhausted in the vicinity where the groove is provided, but the inner wall surface is in close contact with the smooth inner wall surface in the same manner as described above. There is a fear.

Therefore, there is a demand for a rubber bag for a rubber weir that can quickly supply and exhaust a fluid.
JP 2003-213658 A

  An object of the present invention is to provide a rubber bag body for a rubber weir that can quickly supply and exhaust a fluid in view of the above-described drawbacks and demands.

  As a result of intensive studies to solve the above problems, the inventor has a smooth inner wall surface of the rubber bag forming the rubber weir. The inventors have paid attention and found that the above-mentioned problems can be solved by forming a concave or convex shape on the inner wall surface, and the present invention has been completed.

That is, the present invention provides a rubber weir rubber formed by a rubber bag body which is installed so as to cross the water channel so as to form a weir in the water channel, and in which the weir stands up and down by expansion and contraction due to supply and exhaust of fluid. In the bag making body, a rubber bag body for rubber weir is provided, wherein the inner wall surface of the rubber bag body is formed with a concave or convex shape for suppressing adhesion between the inner wall surfaces. .
With such a configuration, since the concave or convex shape is formed on the inner wall surface of the rubber dam rubber bag body, the fluid in the rubber dam rubber bag body may be exhausted and the bag body contracted. Due to the concave or convex shape of the inner wall surface, the close contact between the inner wall surfaces is suppressed, a void portion remains, and the fluid is quickly exhausted. In addition, since the close contact between the inner wall surfaces is suppressed, it is possible to quickly supply the fluid into the rubber bag body for the rubber weir.

In the present invention, the concave or convex shape is preferably a textured uneven shape.
With such a configuration, the close contact between the inner wall surfaces is further suppressed, and the fluid is supplied and exhausted quickly.

In the rubber bag body for rubber weirs of the present invention, since the concave or convex shape is formed on the inner wall surface of the rubber bag body, the close contact between the inner wall surfaces can be suppressed, and the gap can be quickly provided. Fluid supply and exhaust can be performed.
Further, in the rubber bag body for the rubber weir of the present invention, since the close contact between the surfaces (inner wall surfaces) of the inner rubber layer is suppressed, the supply pressure at the time of raising the rubber weir by supplying fluid is increased. Excessive rise can be suppressed.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a schematic cross-sectional view of a rubber bag 1 for a rubber weir according to this embodiment.
As shown in FIG. 1, a rubber bag body 1 for a rubber weir includes an inner rubber layer 2 that encloses a hollow portion 6 into which a fluid such as air is press-fitted, and an inner reinforcing canvas that encloses and reinforces the inner rubber layer 2. 3, an outer reinforcing canvas 4 that wraps and reinforces the inner reinforcing canvas 3, and an outer rubber layer 5 that covers the outer side of the outer reinforcing canvas 4.

Examples of rubber used as the inner rubber layer 2 and the outer rubber layer 5 include natural rubber, SBR (styrene-butadiene rubber), NBR (nitrile rubber), BR (butadiene rubber), and CR (chloroprene rubber). , Mainly composed of one or more of EPDM (ethylene propylene rubber), etc., so as to have a predetermined strength and elongation, a reinforcing material such as carbon black, a softener such as liquid rubber, a vulcanizing agent, a vulcanization accelerator, The thing with which general rubber compounding agents, such as anti-aging agent, are mix | blended can be mentioned.
Among them, a rubber mainly composed of EPDM (ethylene / propylene rubber) is preferable in order to improve the weather resistance.

  The canvas used as the inner reinforcing canvas 3 and the outer reinforcing canvas 4 is preferably a woven cloth such as a polyamide fiber or an aramid fiber which is resistant to bending and impact, for example, a nylon canvas.

In the present embodiment, a concave or convex shape is formed on the surface of the inner rubber layer 2 (inner wall surface) to suppress the close contact between the inner wall surfaces.
Since a concave or convex shape is formed on the surface of the inner rubber layer 2, the close contact between the inner rubber layers 2 is suppressed, and fluid supply and exhaust are performed quickly.

  In the present invention, the concave or convex shape may be formed on substantially the entire surface of the inner rubber layer so as to suppress the close contact between the inner rubber layers (inner wall surfaces). You may form in the substantially whole part, Furthermore, it may be formed by being scattered on both surfaces or one surface side.

Examples of the concave or convex shape include texture irregularities.
By providing the texture irregularities, the close contact between the inner rubber layers 2 is suppressed, and a fluid flow path is secured.

The concave or convex shape formed on the surface of the inner rubber layer 2 by a fabric (for example, a coarse woven fabric such as plain weave) or the like can be appropriately adjusted and provided.
For example, the convex-convex interval may be 1 mm or more, and if it is 3 mm to 5 mm, the fluid can be supplied and exhausted sufficiently quickly.
Also, if the depth of the recess is 1 mm or more, the fluid can be sufficiently supplied and exhausted quickly. In addition, the thickness of the inner rubber layer 2 actually used is about 2 mm to 4 mm, and the upper limit value of the depth of the recess is less than the thickness of the inner rubber layer used.
The convex-convex interval can be measured with a caliper or a steel ruler, and the depth of the concave can be measured with a depth gauge or the like.
In addition, the convex-convex interval and the concave depth given here are examples, and these numerical values can be appropriately adjusted in consideration of the relationship between the size of the rubber bag and the supply / discharge amount of fluid.

(Embodiment 1)
FIG. 2 is a schematic view of a textured uneven shape provided on substantially the entire surface (inner wall surface) of the inner rubber layer 2.
In the first embodiment, the textured irregular shape is formed over substantially the entire surface of the air supply / exhaust port 7 of the rubber bag 1 for rubber weirs or the vicinity of the air supply / exhaust port 7 and the surface (inner wall surface) of the inner rubber layer 2. ing.
In addition, the said air supply / exhaust port 7 is provided in arbitrary positions on slopes and / or floor surfaces, such as a river and an irrigation channel, and is connected to the fluid supply / exhaust device (not shown).

By forming a texture irregularity shape on substantially the entire surface (inner wall surface) of the inner rubber layer 2, it is possible to substantially suppress the close contact between the inner wall surfaces when exhausting fluid (air, etc.), When the textured irregularities come into contact with each other, a gap is formed and the exhaust of fluid (air or the like) is improved.
In addition, when fluid (air, etc.) is supplied again after exhausting, since the close contact between the inner wall surfaces is substantially suppressed over the entire surface, the force to peel off the close contact portion is reduced, and fluid supply during fluid supply The pressure can be reduced, the operating cost can be reduced, and the rubber bag body 1 for rubber weir can be started to inflate almost uniformly.
In addition, it is preferable not to provide uneven | corrugated shape in the side edge part of the rubber bag body 1 for rubber weirs fixed with fastening members, such as a floor surface, such as a river or a water channel, and a volt | bolt. This is to maintain the airtightness of the rubber bag for the rubber weir.

(Embodiment 2)
FIG. 3 is a schematic view of a textured uneven shape formed on a substantially half surface of the surface (inner wall surface) of the inner rubber layer 2.
In the second embodiment, the inner rubber layer 2 is in contact with the inner rubber layer 2 before supplying fluid, and the textured uneven shape is formed on one surface 2a in contact with the inner rubber layer 2. In this case, it is formed on substantially the entire surface of one surface, and the other surface 2b does not have a textured uneven shape over the entire surface (smooth surface).

When one surface 2a has the textured uneven shape and the other surface 2b has a smooth surface, a void portion is formed when the top of the textured uneven surface abuts the smooth surface when the fluid is exhausted. The exhaust is performed quickly.
In addition, when supplying the fluid, since the gap portion is formed by contacting the top of the convex part of the textured uneven shape and the smooth surface, the supply pressure of the fluid at the time of supplying the fluid can be reduced, and the operation is performed. The cost can be reduced, and furthermore, the rubber bag body 1 for rubber weirs can be inflated almost uniformly.

Next, the manufacturing process of the rubber bag 1 for rubber weirs according to the first and second embodiments will be described with reference to FIGS.
First, as a first step, as shown in FIG. 4A, the inner reinforcing canvas 3 is overlaid on the outer reinforcing canvas 4.
After the first step, as the second step, the inner rubber layer 2, the cloth mold A, and the inner rubber layer 2 are stacked in this order on the upper surface of the inner reinforcing canvas 3 as shown in FIG.
The inner rubber layer 2 contains, for example, EPDM (ethylene / propylene rubber) as a main component and a vulcanizing agent. The cloth mold A is provided with a concave or convex shape at a predetermined interval. The cloth mold A is preferably subjected to a mold release treatment for facilitating peeling from the inner rubber layer 2.
After the second step, as the third step, as shown in FIG. 4 (c), the inner reinforcing canvas 3 is wrapped so as to wrap the inner rubber layer 2, the cloth mold A, and the inner rubber layer 2 stacked in this order. And the outer reinforcing canvas 4 is bent.
After the third step, as a fourth step, as shown in FIG. 4 (d), the outer rubber layer 5 is overlapped on the upper surface, the lower surface and one side surface of the envelope wrapped by the reinforcing canvases 3 and 4 and is not added. Sulfur rubber bag.
Next, as a fifth step, the unvulcanized rubber body is pressed and heated by, for example, a large flat plate press to obtain a vulcanized body (FIG. 4 (e)).
Next, as a sixth step, as shown in FIG. 4 (f), the other side of the rubber body after vulcanization is opened and the cloth mold A is removed to obtain a rubber sheet for rubber weir. It is done.

  Next, the rubber sheet for the rubber weir is disposed so as to cross the river or the like, and the opening end 11 of the rubber sheet for the rubber weir is placed on the upper surface of the dam foundation 10 with the sheet metal 12 as shown in FIG. The rubber bag body 1 for rubber weirs is obtained by closing and fixing by pressing with the bolts 13.

  The rubber bag body 1 for rubber weirs of the above embodiment is configured as described above and manufactured as described above. The rubber bag body 1 for rubber weirs is made of rubber for rubber weirs. It can be used as a rubber weir by injecting air into the bag body 1 and inflating it to a predetermined height.

  In the rubber bag body for rubber weirs of the present invention, since the concave and convex shapes are formed on the inner wall surface of the rubber bag body for rubber weirs, the inner wall surfaces are in close contact with each other at the time of evacuation, making exhausting difficult. Can be suppressed.

FIG. 1 is a schematic cross-sectional view of a rubber bag 1 for a rubber weir according to the present embodiment. FIG. 2 is a schematic plan view of an embodiment of a textured uneven shape formed on the surface of the inner rubber layer 2. FIG. 3 is a schematic plan view of another embodiment of the textured irregular shape formed on the surface of the inner rubber layer 2. 4 (a) to 4 (f) are schematic views of a manufacturing process of a rubber bag for a rubber weir. FIG. 5 is a sectional view of a rubber weir completed using a rubber bag for a rubber weir.

Explanation of symbols

1 Rubber bag for rubber weir 2 Inner rubber layer 3 Inner reinforcing canvas 4 Outer reinforcing canvas 5 Outer rubber layer

Claims (2)

In a rubber bag body for rubber weirs, which is installed so as to cross the water channel to form a weir in the water channel, and formed by a rubber bag body in which the weir stands up and down by expansion and contraction due to supply and exhaust of fluid,
A rubber bag body for a rubber weir, wherein the inner wall surface of the rubber bag body is formed with a concave or convex shape for suppressing adhesion between the inner wall surfaces.   The rubber bag for a rubber weir according to claim 1, wherein the concave or convex shape is a textured uneven shape.

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