JPH09137434A - Up and down weir made of flexible membrane - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To realize and provide a flexible membrane undulating weir having a bulletproof property in which a cover forming a weir body does not have a hole even if it is hit with a 22-caliber pistol. . SOLUTION: A bulletproof layer 4 covers a part or all of the outer surface of a flexible film 2 forming a sheath 1 for a weir. The bulletproof layer 4 is formed by laminating one or more layers of a flexible film formed by coating a fabric made of aromatic polyamide fiber with a flexible material such as rubber, and the fabric weight is 2 kg / m ² or more. It is a layer with.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible film undulating weir in which a flexible film covering forming a weir body is provided with bulletproof performance.

[0002]

2. Description of the Related Art A flexible membrane undulating weir is constructed by attaching a flexible membrane envelope, which serves as a weir body, to a river or the like and supplying a fluid such as air or water to the inside of the envelope to inflate and raise it. The fluid is discharged so that it can be collapsed and collapsed (for example, Japanese Patent Publication No. 40).
-11702, Japanese Patent Publication No. 44-2371).

[0003]

The flexible membrane constituting the above-mentioned envelope is usually one in which a woven fabric of organic fiber such as nylon or polyester is covered with rubber or plastic to be integrated (hereinafter referred to as rubber). The number of laminated layers of the film is adjusted according to the required strength.

By the way, an undulating weir using this kind of rubberized cloth is liable to be penetrated by a driftwood and a knife by a mischief in actual use. In addition, overseas, there is a case where it is actually damaged because it may be punched by a firearm.

Conventionally, in order to prevent such natural or artificial damage, it has been practiced to embed a difficult-to-cut material inside the rubber or plastic of the rubberized cloth to enhance the damage resistance (special feature). JP-A-62-121221 and JP-A-63-12
No. 189515). However, no attempt has been made to impart ballistic resistance. There is also a report (see Japanese Patent Publication No. 6-86726) that a rubber weir having a damage resistant layer having a large number of ceramic chips embedded therein has anti-ballistic properties.
This is because the specific gravity of ceramic chips is 2 to 2 compared to rubber.
The size of the weir is limited due to the problem of transportation because the weight of the entire weir increases four times (depending on the location of the weir, such as in the mountainous area, the weight limit of the transport road becomes quite strict). There is a problem that workability is reduced. Further, it is difficult to hide the surface 100% by embedding the chip, and the bulletproof effect is not sufficient.

In view of the above, the present invention has been developed to solve such problems.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a ballistic layer made of aromatic polyamide fibers coated with a flexible material such as rubber is provided on the outer surface of a rubberized cloth forming a weir in one or more layers. It is provided to provide anti-elasticity to the weir. In this case, the bulletproof layer has a structure in which the fabric weight is 2 kg / m ² or more.

[0008] If necessary, a means for adjusting the yarns constituting the woven fabric of the aromatic polyamide to 1500 denier or more, and a means for setting the cover factor (also referred to as a covering coefficient) of the woven fabric to 0.7 or more, respectively. To be adopted. The details will be described below.

The aromatic polyamide fiber used in the present invention is
For example, fibers having an aromatic polyamide structure represented by Kevlar (trademark of DuPont) and Technora (trademark of Teijin) can be used. A woven fabric is composed of the yarn made of this fiber, and the weir body is made to have anti-ballistic property by a layer in which the woven fabric is covered with rubber. At this time, the layers are laminated so that the basis weight of the woven fabric is 2 kg / m ² or more. The fabric weight is the yarn weight per unit area and is usually expressed in g / m ² . At this time, the basis weight is 2k
It is preferable in terms of cost to provide one layer of rubber coated on a woven fabric of g / m ² or more, but the present invention is not limited to this. That is, ^two or more layers of rubber coated on a woven fabric made of aromatic polyamide fiber having a basis weight of 2 kg / m ² or less are laminated, and finally a layer having a structure in which the basis weight of the fabric exceeds ² kg / m ² is bulletproofed. It may be provided as a layer on the outer surface of the rubberized cloth.

In this case, considering that the cost increase and the weight increase cannot be ignored due to the lamination, it is not realistic to laminate three or more layers, and it is desirable that the number of layers is two or less.

Further, in the present invention, the thread thickness is 150
When it is 0 d (denier) or more, the ballistic resistance can be imparted more efficiently. Denier is a unit that represents the thickness of the thread, and 9
It is defined as the weight of a yarn of 000 m. Thread thickness 15
If it is 00d or more, the basis weight can be increased without significantly increasing the number of yarns, which is advantageous in terms of cost. For fabrics using yarn of 1500d or less, the basis weight is 2
Since it is practically impossible to realize kg / m ² , it is necessary to laminate as many layers of rubber as the fabric (usually 5 layers or more), which is not preferable in terms of cost and weight. Therefore, it is desirable to use a woven fabric composed of 1500 d or more threads.

In the present invention, the weave structure of the woven fabric of aromatic polyamide fibers may be plain weave, basket weave, twill weave, satin weave, or the like. This is just an example, and other weave fabrics can of course be used. Whatever weave design is used, it is desirable that the cover factor is 0.7 or more for the thread driving density. Here, the cover factor is also called a coverage factor and can be expressed by Equation 1. (Cover factor) = (T _f + Y _f ) − (T _f × Y _f ) ... (1) T _f : Number of warp yarns (/ inch) / (1 yarn having a thickness to be used)
Maximum number) Y _f Uchikomeru inch: wefts (/ inch) ÷ (yarn thickness to be used is 1
(Maximum number that can be driven in inch) When the cover factor is less than 0.7, the permeation of the rubber into the woven fabric cannot be ignored when coating the rubber, resulting in poor workability. Naturally, the number of threads to be driven in is reduced, so that it is not possible to earn a basis weight, which is disadvantageous in terms of cost. Therefore, the woven fabric made of aromatic polyamide fibers used for the bulletproof layer preferably has a cover factor of 0.7 or more.

[0013]

[Function] A woven fabric made of aromatic polyamide fibers and one or more rubber-coated layers are laminated to have a fabric weight of 2
Fired from a pistol of at least 22 caliber by covering the outer surface of a rubberized fabric forming a weir with a bulletproof layer of at least kg / m ² (this may be only some of the surfaces that may be struck by a gun) The rubber weir can be provided with anti-ballistic properties that stop bullets.

Further, the woven fabric made of aromatic polyamide fibers usually has an elongation exceeding 10% elongation applied to the weir, and the performance of the weir itself is not restricted by installing the bulletproof layer.

Further, if the yarn of the woven fabric made of aromatic polyamide fiber is 1500 denier or more or the cover factor is 0.7 or more, the weir is bulletproof in a form that suppresses cost increase, processability deterioration and weight increase as much as possible. It can impart sex.

[0016]

1 is a front view of a flexible membrane undulating weir of the embodiment, and FIG. 2 is a vertical sectional side view.

In the figure, 7 is a river bed, and 1 is a flexible film envelope (weir body) that forms a weir. The envelope 1 fixed to the riverbed 7 across the river expands and rises by supplying a fluid such as air or water, and contracts and falls by discharging the fluid.

The flexible film 2 forming the envelope 1 is shown in FIG.
As shown in FIG. 2, rubber or plastic is coated on both sides of the woven fabric formed of organic fiber to form a rubberized cloth 3, and the rubberized cloth 3 is vulcanized and adhered in a state of being stuck together. There is.

On the outer surface of the flexible film 2, a bulletproof layer 4 having a size that substantially covers the entire surface is fixed. This bulletproof layer 4 has a basis weight of 2 kg /
Woven fabric 6 made of aromatic polyamide fiber having a size of m ² or more
Is covered with rubber or plastic 5.
As shown in FIG. 4, when the fabric having a basis weight of 1 kg / m ² or more is coated with rubber or plastic and two layers are laminated to have a basis weight of 2 kg / m ² or more and fixed to the outer surface of the flexible membrane 2. There is also. In the case of this structure, fabrics with different basis weights are formed into layers, and these are laminated to give a basis weight of 2 kg / m.
You may make it ² or more. Further, the number of stacked layers may not be two, and may be increased if necessary.

Depending on the case, the yarn constituting the woven fabric 6 has a thickness of 1500 denier or more. In addition, the weave structure of the woven fabric is arbitrarily selected so that the cover factor is 0.7 or more in some cases.

In the flexible membrane undulation weir of the embodiment having the above structure, the bulletproof layer 4 containing the woven fabric of aromatic polyamide fiber imparts the ballistic resistance to the surface of the flexible membrane 2, and the pistol having a diameter of 22 is provided. For bullets from, it completely blocks its penetration. More specifically, all the bullet energy (Equation 2) calculated from the bullet weight and the bullet velocity is 10 kgf · m is accepted.

(Bullet energy) = 0.5 · w · (1 / g) · (v ₁ ² −v ₂ ² ) ... (2) w: bullet weight g: gravitational acceleration v ₁ : post-penetration bullet velocity v ² : Bullet velocity before penetration In the above embodiment, the entire outer surface of the region that is likely to appear on the water surface of the flexible film 2 forming the envelope 1 is continuous in the envelope longitudinal direction (river width direction). Although the bulletproof layer 4 is provided, the bulletproof layer 4 is provided only on the surface of the flexible film 2 in the circumferential direction of the covering as shown in FIG. A layer 4 may be provided to protect only the encased surface in the vulnerable position from bullets.

<Test Example> In order to see the effect of the bulletproof layer used in the present invention, various samples were manufactured and comparative tests of bulletproof performance were performed on them.

Each of the samples used in the test was obtained by adhering a bulletproof layer on a flexible film forming a cover of a weir, and the lower flexible film was made of nylon rubber on top and bottom of raw rubber. A rubberized cloth was formed by coating, two rubberized cloths were pasted together, and then vulcanized and bonded. This flexible film was the same for all samples and had a thickness of 6 mm. The bulletproof layer adhered on the flexible film was produced by covering the upper and lower sides of a woven fabric made of various Kevlar fibers with raw rubber and vulcanizing it. The fabric used for the bulletproof layer and the structure of the bulletproof layer of each sample are shown in Table 1.
Shown in

[0025]

[Table 1]

The test evaluated each ballistic resistance of the manufactured samples. In this case, using a shooting test device with a variable bullet speed, the bullet energy is approximately the same as that of the normal 22-caliber pistol (about 10 kgf · m) in the above-mentioned formula 2.
It was adjusted so that a 22 caliber bullet would penetrate. Table 2 shows the results.

[0027]

[Table 2]

In Tables 1 and 2, sample No. 1-6
Is a product of the present invention, and 7 and 8 are comparative products. NP in the bullet penetration section indicates that it did not penetrate, and P indicates that it penetrated. Further, in the cost item, the bulletproof layers having a total number (lamination number) of 1 to 3 are marked with ⊚, those of 4 to 6 are marked with ◯, and those with 7 or more are marked with Δ. The workability is judged by the workability of the process of covering the rubber of the woven fabric, ◎ that can be manufactured without problems in the conventional work process, ◎ that requires some improvement, and the process such as special treatment is added. The necessary items were marked as △.

Regarding the weight, a sample in which ceramic particles (aluminum oxide, manufactured by Nippon Carlit) were embedded in a rubber sheet with no gaps was manufactured for weight evaluation, and the weight was measured. As a result, it was confirmed to be 16 kg / m ² .

As shown in Table 2, each of the products of the present invention was able to stop the bullet having a diameter of 22 which is the target of the ballistic resistance. In Samples 7 and 8 having comparative fabric weights of 2 kg / m ² or less, the 22 caliber bullet could not be stopped. It was also found that the weight was 1/2 or less of that when the ceramic particles were embedded.

[0031]

As described above, in the present invention, the fabric weight of the aromatic polyamide fiber used for imparting the ballistic resistance is set to be ² kg / m ² or more. Can be improved to the extent that a 22 caliber bullet can be stopped. Further, since the material for imparting ballistic resistance is a woven fabric made of aromatic polyamide fiber,
When it is integrated with the weir, there is no problem in stretchability, it is also excellent in corrosion resistance, and it is possible to impart anti-ballistic property while suppressing the weight increase as much as possible.

By setting the yarn of the woven fabric made of aromatic polyamide fiber to 1500 denier or more, the cost increase can be suppressed as much as possible. Further, by setting the cover factor to 0.7 or more, it is possible to impart the ballistic resistance without any problem in the workability.

[Brief description of the drawings]

FIG. 1 is a front view showing a covering weir of an embodiment.

FIG. 2 is a vertical sectional view of the undulating weir of the above.

FIG. 3 is a cross-sectional view showing the internal structures of a flexible film and a bulletproof layer.

FIG. 4 is a cross-sectional view showing the internal structure when the bulletproof layer has two layers.

FIG. 5 is a vertical sectional view of a weir in which a bulletproof layer is provided only in a necessary portion.

[Explanation of symbols]

 1 Cover 2 Flexible Membrane 3 Rubberized Cloth 4 Bulletproof Layer 5 Rubber or Plastic 6 Woven Fabric Made of Aromatic Polyamide Fiber 7 Riverbed

Claims (3)

[Claims] 1. A flexible film envelope forming a weir is installed in a direction transverse to a river or the like, and a fluid is supplied into and discharged from the inside of the envelope so that the envelope is expanded and erected and contracted and collapsed. In the undulating weir made of a flexible film, a bulletproof layer having a fabric weight of 2 kg / m ² or more is formed by laminating one or more layers of a flexible film obtained by coating a woven fabric of aromatic polyamide fiber with a flexible material. A flexible film undulating weir, characterized in that it covers a part or all of the outer surface of the flexible film forming a covering with the bulletproof layer. 2. The flexible membrane undulating weir according to claim 1, wherein the fabric of the bulletproof layer is composed of yarns of 1500 denier or more. 3. The flexible membrane undulating weir according to claim 1, wherein the fabric of the bulletproof layer has a covering coefficient of 0.7 or more.