JP2002348843A - End-section reinforcing tool for pneumatic stowing type floating body and water-pollution preventive fence using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an end-section reinforcing tool capable of lengthening the lifetime of the whole pneumatic stowing type floating body and a water- pollution preventive fence having a long lifetime. SOLUTION: The end-section reinforcing tool (20) used for a pneumatic stowing type floating body, in which the floating bodies (10) are manufactured by installing and hermetically sealing end-section metal fittings (12) to cylindrical bodies (11) having flexibility and filling the insides of the cylindrical bodies (11) with air and which has partial bending preventive sections (21), by which the cylindrical bodies (11) are not bent suddenly at the side of the end-section metal fittings (12), is provided. The water-pollution preventive fence, which uses such an end-section reinforcing tool (20) and in which the end-section reinforcing tool (20) is fixed at the side of the end-section metal fittings (12) on the cylindrical body (11) sides, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water pollution control fence such as a silt fence or an oil fence, which is provided with an end reinforcement for preventing kink and a kink prevention measure.

[0002]

2. Description of the Related Art Water pollution prevention fences such as silt fences and oil fences are used to prevent underwater and water pollution caused by landfills and crude oil spills from spreading to the surroundings. These fences have a floating body, and the necessary length of curtain is attached to the underside of the floating body to prevent the diffusion of water pollution. We cope with curtain. In the case of underwater, there are a case where a curtain is hung from a floating body on the water surface and a case where a curtain at the bottom of the water is lifted by a floating body.

The floating body used for the fence may be made of styrene foam or the like. However, a flexible body such as rubber is used to form a belt-like tubular body having a slit therein, and an end fitting is provided. There is also a type in which a slit is provided inside the cylindrical body, air is filled in the slit, and the air is inflated to form a floating body. The air-filled floating body can be adjusted in buoyancy by supplying or discharging air, and can be easily floated and lowered as necessary. Therefore, the air-filled floating body is widely used in a water area with a lot of water traffic or a water area with severe sea conditions.

[0004]

However, in the air-filled floating body, as shown in FIG. 5, a kink in which the tubular body 11 bends sharply at the end fitting 12 is apt to occur, and the cylinder at the kink portion is easily generated. There is a problem that the shape 11 may be damaged.

[0005] That is, the end fitting 12 has high rigidity, and the tubular body 11 in the expanded portion filled with air has relatively high rigidity due to the internal pressure. On the other hand, since the tubular body 11 in the portion adjacent to the end fitting 12 gradually expands as the distance from the end fitting 12 increases, the flexible tubular body 11 does not expand at all at the end fitting 12. The rigidity is the lowest because it remains as it is. Therefore, kink easily occurs at the end fitting 12 having the lowest bending stiffness, and depending on the marine conditions, the kink tends to be extremely bent by the tidal current or the wave force, resulting in damage to the tubular body 11.

Accordingly, the present invention increases the bending stiffness of the cylindrical body in the portion adjacent to the end fitting, thereby reducing the difference in rigidity from the end fitting to the tubular body in the portion which is completely expanded by filling with air. It is an object of the present invention to provide an end reinforcing member and a long-life water pollution prevention fence that can reduce the length of the air-filled floating body and extend the life of the whole air-filled floating body.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the first of the gist of the invention is as follows.
An end reinforcing member used for an air-filled floating body which is attached to an end fitting on a flexible tubular body, hermetically sealed, and filled with air inside the tubular body to form a floating body, The present invention relates to an end-reinforcing device for an air-filled floating body having a local bend preventing portion for preventing a tubular body from being sharply bent at an end fitting.

Preferably, the local bend preventing portion comprises a mounting portion fixed to the lower fin of the tubular body adjacent to the end fitting, and a flange extending vertically from the mounting portion. In particular, the end reinforcing member has an end portion of the mounting portion on the tubular body side bent toward the flange side, and the flange has a shape diverging toward the tubular body side.

The end reinforcing member may be provided with a pair of local bend preventing portions at intervals between straddling portions of the opposing floating bodies, and the end reinforcing member may have an underwater weight of +20 kg or more.
Preferably, the buoyancy is adjusted between -20 kg.

A second aspect of the present invention is a water pollution prevention fence using the above-described end reinforcement, wherein the end reinforcement is fixed at the end fitting on the tubular body side. It concerns water pollution prevention fences.

[0011] Preferably, the present invention relates to a water pollution prevention fence in which end reinforcing members are fixed to both the front and back surfaces of the cylindrical body. In this case, the front and rear end reinforcing members are provided below the cylindrical body. It is preferable that they are connected to each other through a hole opening to the side fin. Also, in particular, the end reinforcements on one side are individually attached to the respective floating bodies on both sides of the connecting portion of the opposing floating body, and the end reinforcements on the other side are a pair of members at an interval over the connecting portion. It is preferable to provide a local bending prevention part.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The end reinforcement of an air-filled floating body according to the present invention is provided with a local bending preventing portion for preventing a tubular body from being sharply bent at an end fitting. That is,
Attach the end fitting to a flexible tubular body and seal it,
In an air-filled floating body in which air is filled into a cylindrical body to form a floating body, local bending of the cylindrical body is prevented at the end fitting having the lowest bending stiffness and easily causing kink.

Therefore, the cylindrical body in the portion adjacent to the end fitting is reinforced, and the difference in rigidity from the end fitting to the cylindrical body inflated completely by filling with air is reduced. Even in this case, the tubular body does not bend sharply, and the life of the entire air-filled floating body can be extended.

Here, the shape and material of the local bending preventing portion of the end reinforcing member are not limited as long as the tubular body can be prevented from being sharply bent at the end fitting. For example, in the case of a belt-shaped cylindrical body having a slit inside, even if holes are opened in the upper and lower fins without slits, there is no problem in filling the air, so bolts and the like are provided in the lower fin. And a flange extending vertically from the mounting portion to form a local bending preventing portion. in this case,
If the end of the mounting portion on the cylindrical body side is bent toward the flange side, and if the flange is formed so as to expand toward the cylindrical body side, the cylindrical body will bend gradually along the bending of the mounting portion, and The flange ensures sufficient strength. Further, the end reinforcement may be made of steel or a material having the same strength as steel, and may have sufficient strength against a bending moment acting on the local bending preventing portion.

Incidentally, the air-filled floating body may be used alone as a water pollution prevention fence, or the end fittings of a plurality of floating bodies may be interconnected to form a long fence. Therefore, the mounting position of the end reinforcement of the present invention is only near the end fitting at the end of the fence, or depending on the sea condition, only near the end fitting at the connecting portion of the floating body in the middle of the fence, or both. In any case, it is fixed at the end fitting on the tubular body side.

The end reinforcement may be fixed to only one of the front and back surfaces of the tubular body, or may be fixed to both surfaces thereof.
In other words, when the tubular body always bends only in one direction due to sea conditions such as the direction of the tidal current is constant, it is sufficient to attach the end reinforcement only on the bent side, and when there is a possibility that it may bend in both directions. It is attached to both front and back of the cylindrical body.

Here, when attaching the end reinforcing members to both the front and back surfaces of the cylindrical body, if both are connected to each other by bolts or the like through holes formed in the lower fins of the cylindrical body, the two can be easily and surely connected. Can be fixed.

When the end reinforcements are attached to the connecting portions of the opposing floating bodies, the end reinforcements may be independently attached to the respective floating bodies, or both may be integrated. That is, an end reinforcement provided with a pair of local bend preventing portions is used at an interval straddling the connecting portion of the opposing floating body.

Further, an end reinforcement may be attached to both the front and back surfaces of the tubular body at the connecting portion of the floating body. in this case,
End reinforcements provided with a pair of local bend prevention parts at both front and back sides of the joint may be used, but it is only one of them, and the other is to attach a single end reinforcement to each floating body You may. In short, the shape, material, mounting position, quantity, etc. of the end reinforcement may be appropriately determined in consideration of the sea condition and workability, and even if not one kind but many types of end reinforcement are used together. Good.

The portion of the tubular body adjacent to the end fitting gradually expands as the distance from the end fitting increases, thereby obtaining buoyancy.
Conversely, the end fittings are heavy and have no buoyancy in the vicinity, so they tend to sink in the first place. If the end reinforcements are fixed, they become heavier. In particular, there is little margin buoyancy at the connecting portion of the floating body due to the presence of the connecting fitting. Therefore, in order to prevent subsidence due to the addition of the end reinforcement, the end reinforcement should be
It is preferable to adjust the buoyancy between 20 kg and -20 kg. With such an underwater weight, even when used for a floating-sink type fence, it does not affect the floating-sinking operation.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a preferred embodiment of the present invention. Figure 1 is a perspective view showing a first embodiment 20 ₁ end brace 20 of the present invention. End brace 20 ₁ of the first embodiment, the local bending prevention unit 2 the tubular body 11 so as avoid bending sharply at the time of end fitting 12
1 and the local bending prevention part 21 is provided with the end fitting 12.
The mounting portion 21A is fixed to the lower fin portion 11A of the tubular body 11 adjacent to the mounting portion 21A, and the flange 21B extends vertically from the mounting portion 21A. Then, the end of the mounting portion 21A on the tubular body 11 side is bent toward the flange 21B side, and the flange 21B has a divergent shape toward the tubular body 11 side.

Accordingly, the cylindrical body 11 is bent gently along the bending of the mounting portion 21A, and the occurrence of a kink in which the cylindrical body 11 bends sharply even under severe sea conditions can be prevented. In FIG. 1, the end brace 20 ₁ is secured by a bolt 40 which is threaded through the hole 11B opened to the lower fin portion 11A of the tubular body 11, opposite to the floating body 10 _1, 10 ₂ It is adapted to be attached to both sides of the connecting portion 30 respectively.

[0023] FIG. 2 is a perspective view showing a second embodiment 20 _second end brace 20 of the present invention. End brace 20 ₂ of the second embodiment are those having a preventing portion 21 _1, 21 ₂ a pair of local bending at intervals across the connecting portion 30 of the floating body 10 _1, 10 ₂ facing. Then, and end brace 20 ₂ becomes in a box shape, the outflow preventing chain 50 is attached to the lower surface thereof.

[0024] The end reinforcement member 20 ₂ of the second embodiment is also fixed by a bolt 40 which is threaded through the hole 11B opened to the lower fin portion 11A of the cylindrical body 11, cylindrical body 11 is bent locally Since the attachment portion 21A of the prevention portion 21 is gently bent along the bend, the occurrence of kink can be prevented. An end brace 20 ₂ of the box shape, +2 underwater weight
The buoyancy is adjusted between 0 kg and -20 kg, so that the connecting portion 30 can be prevented from sinking. The reason why the underwater weight is not constant is that the weight varies depending on the degree to which the weight of the outflow prevention chain 50 acts.

FIG. 3 is a perspective view showing an example of the water pollution prevention fence of the present invention.
It is a silt fence with 0 attached. In other words, a both side of the connecting portion 30 of the opposite floating body 10 _1, 10 _2, the end brace 20 ₁ of the first embodiment is disposed on the rear side, the end brace of the second embodiment in that the front side 20 ₂ , and two end reinforcements 20 sandwiching the lower fin 11 </ b> A of the cylindrical body 11.
₁ and one of the end brace 20 ₂ which are connected to each other. Incidentally, the chain outflow preventing end brace 20 ₂ 5
Numeral 0 is attached to the connection between the lower fin 11A of the tubular body 11 and the curtain 60.

Since the silt fence has the curtain 60, the external force acting on the floating body 10 is large.
Since 0 is swept away, the fence shape tends to become an eight-shaped shape with the connecting portion 30 at the top. Thus, the tubular body 11 at the time of the end brace 20 ₁ or 20 ₂ When the end brace 20 ₁ and 20 ₂ is not attached is bent sharply. However, in the case of the silt fence shown in FIG. 3, the kink does not occur because the tubular body 11 bends gently along the bend of the mounting portion 21A of the local bend preventing portion 21.

FIG. 4 shows the effect of the end reinforcing member 20 and is a result of measuring the bending state of the tubular body 11 before and after the end reinforcing member 20 is attached. As shown in FIG. 4, the bending of the tubular body 11 at the time of the end reinforcement 20 is greatly reduced by the attachment of the end reinforcement 20.

[0028]

According to the end reinforcement and the water pollution prevention fence of the present invention, the cylindrical body adjacent to the end having the lowest bending stiffness is reinforced and completely filled with air from the end. The rigidity difference between the cylindrical body of the bulging part is reduced, the kink that the cylindrical body bends sharply even under severe sea conditions can be prevented, and the life of the entire air-filled floating body can be extended. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of an end reinforcement according to the present invention.

FIG. 2 is a perspective view showing a second embodiment of the end reinforcing device of the present invention.

FIG. 3 is a perspective view showing an example of a water pollution prevention fence of the present invention.

FIG. 4 is a view showing a result of measuring a bending state of a tubular body before and after attaching an end reinforcing device of the present invention.

FIG. 5 is a top view showing a bent state of the tubular body in a state where the end reinforcing device of the present invention is not attached.

[Explanation of symbols]

10,10 _1, 10 ₂ ‥ floating 11 ‥ tubular body 11A ‥ lower fin portion 11B ‥ hole 12 ‥ end fitting 20,20 _1, 20 ₂ ‥ end brace 21,21 _1, 21 ₂ ‥ local Bending prevention part 21A ‥ Mounting part 21B ‥ Flange 30 ‥ Connection part 40 ‥ Bolt 50 ‥ Leak prevention chain 60 Curtain

Continuation of the front page (72) Inventor Haruyoshi Yamase 52-1-606 Nazecho, Totsuka-ku, Yokohama-shi, Kanagawa F-term (reference) 2D025 BA02 BA06

Claims (9)

[Claims] An end fitting (12) is attached to a flexible tubular body (11) and hermetically sealed, and air is filled into the tubular body (11) to form a floating body (10). An end reinforcement (20) used for an air-filled floating body, comprising: a tubular body (1);
1) An end reinforcing device for an air-filled floating body, comprising: a local bending preventing portion (21) for preventing sharp bending at an end fitting (12). 2. A local fin (21) having a lower fin (11) adjacent to an end fitting (12).
A) and an attachment portion (21A) fixed to the attachment portion (21A).
The end reinforcing device for an air-filled floating body according to claim 1, comprising a flange (21B) extending vertically from A). 3. An end of the mounting portion (21A) on the tubular body (11) side is bent toward the flange (21B) side, and the flange (21B) expands toward the tubular body (11) side. The end reinforcing device for an air-filled floating body according to claim 2, wherein: 4. The end reinforcing device (20) includes a pair of local bending preventing portions (21 ₁ , 21 ₂ ) at intervals between the connecting portions (30) of the opposing floating bodies (10 ₁ , 10 ₂ ). The end reinforcing device for an air-filled floating body according to any one of claims 1 to 3, characterized in that: 5. The end brace (20) has an underwater weight of +2.
The buoyancy of the air-filled floating body is adjusted between 0 kg and -20 kg. 6. A water pollution prevention fence using the end reinforcement (20) of the air-filled floating body according to any one of claims 1 to 5, wherein the end is on the side of the tubular body (11). Part fittings (1
The water pollution prevention fence, wherein the end reinforcement (20) is fixed at the time of 2). 7. both sides to the end brace (20 _1, 20 ₂₎ Water Pollution fence according to claim 6, characterized in that is fixed in the tubular body (11). 8. Front and back end reinforcements (20 ₁ , 20 ₂ )
Water pollution prevention fence according to claim 7, characterized in that they are interconnected through a hole (11B) opening in the lower fin (11A) of the tubular body (11). 9. one side of the end brace (20 _1), solely to the connecting portion of the opposite floating body (10 _1, 10 ₂₎ each floating body on both sides of (30) (10 _1, 10 ₂₎ The pair of local bend preventing portions (21 ₁ , 21 ₂ ) are attached at an interval where the end reinforcing member (20 ₂ ) on the other surface side straddles the connecting portion (30).
Claim 8, characterized in that with a 21 ₂₎
Water pollution prevention fence as described in.