JP3135748U - Protective fence - Google Patents

Abstract

[PROBLEMS] To solve the problem that an intrusion prevention measure can be taken by setting the grid diameter and the interval between the grids to an appropriate size, and the burden of the strut strength due to an increase in wind load is increased. Provide a protective fence that can do.
In the protective fence 10 of the present invention, the diameter of the lattice 20 is not less than 5 mm and not more than 32 mm, and the interval between adjacent lattices is not less than 15 mm and not more than 90 mm. By setting the diameter of the grid 20 to 5 mm or more and 32 mm or less, it is possible to take measures to prevent damage and to solve the problem of increasing the strut strength burden due to an increase in wind load. Further, by setting the interval between the grids 20 and 20 to 15 mm or more and 90 mm or less, it is possible to take measures to prevent getting over and to solve the problem that the burden of strut strength due to the increase in wind load increases.
[Selection] Figure 1

Description

  The present invention relates to a protective fence, and more particularly to a protective fence that has high corrosion resistance and radio wave transmission and is suitably used as an airport fence.

  In outdoor facilities such as airfields, protective fences are provided around the facility to prevent entry into the facility. As is well known, such a protective fence has a plurality of support columns standing in the vertical direction, a plurality of trunk edges bridged horizontally between these support pillars, and a predetermined interval between these trunk edges. It is composed of a plurality of lattices that are inserted into the formed insertion holes and are erected in the vertical direction. Moreover, the protective fence is comprised in the height (for example, 3.44m (Haneda Airport)) which cannot get over easily. Further, it is also known that a sharp-shaped member called “snipping” is inclined to the outside of the facility at the upper part of the column of the protective fence, and a sneaking line is stretched over this sneaking.

Further, it is known that the protective fence used as an airport fence is made of fiber reinforced plastic instead of steel in order to avoid radio interference, that is, to have radio wave permeability. In particular, Patent Document 1 discloses a non-metallic fence in which a plastic net is stretched on a frame member made of fiber reinforced plastic. A protective fence made of glass fiber reinforced plastic (product name: Plaalloy (registered trademark), manufactured by Asahi Glass Matex Co., Ltd.) is also known as a protective fence for airport fences.
JP 2000-192694 A

  By the way, in facilities such as airfields, the demand for intrusion prevention measures into the facilities has been increasing year by year, and in particular, overcoming prevention measures to prevent intrusion over the protection fence and intrusion by breaking the fence of the protection fence. There is a need for the development of protective fences with measures to prevent damage.

  The conventional guard fence has a wide gap (gap) between the grids of 100 mm to 200 mm. In this case, it is possible to get over the guard fence by entering the gap and climbing the grid. Is desired to be set to an optimum dimension. The interval between the lattices (100 mm to 200 mm) is set based on a general aluminum protective fence. This is set for the main purpose of preventing passage of people.

  Therefore, it is conceivable to close the gap between the grids in order to take the above-mentioned measures to prevent overcoming, or to increase the diameter of the grid in order to take measures to prevent damage. If the grid is packed or the diameter of the grid is increased unnecessarily, the area of the fence increases, which causes a problem that the burden on the strut strength increases due to an increase in wind load.

  The present invention has been made in view of such circumstances, and by setting the grid diameter and the interval between the grids to appropriate dimensions, it is possible to take measures to prevent intrusion, and to support the column due to an increase in wind load. An object of the present invention is to provide a protective fence that can solve the problem of increased strength burden.

  In order to achieve the above-mentioned object, the invention according to claim 1 is provided with a plurality of support columns standing in a vertical direction, and a plurality of trunk edges bridged horizontally between the plurality of support columns. In the guard fence provided with a plurality of grids that are vertically installed in the through holes formed at predetermined intervals on the plurality of trunk edges, the diameter of the grid is 5 mm or more and 32 mm or less There is a protective fence in which the interval between adjacent grids is 15 mm or more and 90 mm or less.

  According to the present invention, the grid diameter of the protective fence is set to 5 mm or more and 32 mm or less. If the grid diameter is less than 5 mm, it will be easily damaged by human power and will easily allow entry. If the grid diameter exceeds 32 mm, the area of the fence will increase. Occurs.

  Therefore, as in the present invention, by setting the grid diameter to 5 mm or more and 32 mm or less, it is possible to take measures to prevent damage and to solve the problem of increasing the strut strength burden due to an increase in wind load.

  Further, according to the present invention, the interval between the gratings is set to 15 mm or more and 90 mm or less. If the distance between the grids is less than 15 mm, the grids are densely arranged, so that the area of the fence is increased, and there is a problem in that the burden of strut strength due to an increase in wind load increases. Moreover, when the interval of the grid exceeds 90 mm, it becomes easy to put a foot into this interval (gap), and there is a concern that it will get over the protective fence. As for the width of the foot, it is known that the average value of adult men is 10.2 cm, and the average value of adult women is 9.3 cm.

  Therefore, as in the present invention, by setting the grid interval to 15 mm or more and 90 mm or less, it is possible to solve the problem of increasing the strut strength burden due to the increase in wind load, and it is possible to take measures to prevent overcoming.

  The protective fence is preferably formed using a fiber reinforced resin obtained by impregnating a matrix resin composition into a reinforcing fiber including a hard-cut fiber having a hard-to-cut property. Thereby, there exists an advantage that corrosion resistance becomes favorable and it is hard to be cut | disconnected with a cutter.

  According to the guard fence according to the present invention, the diameter of the grid is 5 mm or more and 32 mm or less, and the interval between adjacent grids is 15 mm or more and 90 mm or less. The problem of increasing the burden can also be solved.

  Hereinafter, preferred embodiments of a protective fence according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing an example of a protective fence 10 as an airport fence provided around an airfield facility, and FIG. 2 is an assembled perspective view of the protective fence 10.

  This protective fence 10 has five pillars 16, 16..., Which are erected on the base 12 in the vertical direction, five trunk edges 16, 16. It is comprised from the some grating | lattice 20, 20, ... which was inserted in the insertion holes 18, 18 ... formed in the trunk | limb edge 16,16 ... with the predetermined space | interval, and stood in the perpendicular direction. Further, the trunk edges 16, 16 arranged on both sides of the support pillar 14 are connected via a tubular trunk joint 24 fitted and arranged in the insertion hole 22 of the support pillar. That is, by inserting the trunk edge joint 24 into the end opening of the trunk edge 16, the trunk edges 16, 16 arranged on both sides of the support column 14 are connected. Further, the upper portion of the support column 1 is bent toward the outside of the facility to form a crease portion 26, and a plurality of crease lines 28, 28. Note that the number of the trunk edges 16 is not limited to five, and may be two or more in order to support the lattice 20 vertically. Moreover, although the height of the protection fence 10 is set arbitrarily, it is preferable that it is 3 m or more so that it cannot get over easily.

  The guard fence 10 according to the present invention is characterized in that the diameter of the lattice 20 is 5 mm or more and 32 mm or less, and the interval between adjacent lattices is 15 mm or more and 90 mm or less.

  If the diameter of the lattice 20 is less than 5 mm, it is easily damaged by human power, so that intrusion is easily allowed. In addition, when the diameter of the grid 20 exceeds 32 mm, the area of the fence is increased, so that there is a problem that the strut strength burden due to the wind load increases.

  Therefore, as in the present invention, by setting the diameter of the grating 20 to 5 mm or more and 32 mm or less, it is possible to prevent the grating 20 from being damaged and intruded, and to increase the strut strength burden due to wind load increase. Can be solved. Moreover, the problem that the radio wave permeability is reduced can be solved. A more preferable diameter of the lattice 20 is 6 mm or more and 16 mm or less.

  Furthermore, according to the present invention, the interval between the gratings 20 and 20 is set to 15 mm or more and 90 mm or less. If the distance between the grids 20 and 20 is less than 15 mm, the grids 20, 20... Are densely arranged, resulting in an increase in the fence area, and an increase in the strut strength burden due to an increase in wind load. Furthermore, if the interval between the lattices 20 and 20 exceeds 90 mm, it is easy to put a foot into this interval (gap), and there is a fear that the guard fence 10 will be overcome. As for the width of a person's foot, it is known that the average value of an adult male is 10.2 cm, and the average value of an adult woman is 9.3 cm.

  Therefore, as in the present invention, by setting the interval between the gratings 20 and 20 to 15 mm or more and 90 mm or less, it is possible to solve the problem that the strut strength burden due to the wind load increase is increased. Further, by setting the distance between the grids 20 and 20 to 90 mm or less, it is not possible to put a foot into the gap between the grids 20 and 20, so that it is possible to take measures to prevent the climbing over the protective fence 10. A more preferable interval between the gratings 20 and 20 is 30 mm or more and 70 mm or less. FIG. 3 shows the protective fence 10 in which the diameter of the lattice 20 is 25 mm and the interval between the lattices 20 is 70 mm.

  On the other hand, the protective fence 10 is made of fiber reinforced resin that is reinforced plastic. Since the fiber reinforced resin has a characteristic that it is difficult to be cut with a blade, it is suitable for a member that is exposed and installed among members constituting the protective fence 10, and is particularly applicable to a member that is easily cut when entering. It is more preferable. In the example of FIG. 1, it is preferable to manufacture the support | pillar 14, the trunk edge 16, and the grating | lattice 20 with fiber reinforced resin, and it is preferable to make at least the grating | lattice 20 into fiber reinforced resin.

  The shapes and dimensions of the column 14, the trunk edge 16, and the lattice 20 can be set as appropriate according to the application. For example, in the case of the protective fence 10 surrounding an airfield, the shapes of the support column 14, the trunk edge 16, and the lattice 20 are not particularly limited, but a round bar shape is preferable. Although the thickness is not particularly limited, the diameter of the support column 14 is preferably 50 to 130 mm, and the diameter of the trunk edge 16 is preferably 10 to 50 mm. The diameter of the grating 20 is as described above.

  Moreover, the member which comprises the guard fence 10 consists of a rod-shaped core material which consists of a hardened | cured material of the fiber reinforced resin which impregnated the matrix resin composition in the reinforcing fiber containing a difficult-to-cut fiber, and the surface layer provided with the nonwoven fabric. It is preferable. The surface layer is formed of a cured product obtained by impregnating a non-woven fabric with a part of the matrix resin composition contained in the fiber reinforced resin constituting the core material. That is, the core material and the surface layer are integrated by a cured product of the matrix resin composition that exists continuously across the both.

However, the surface layer for improving the surface property is not essential. The material of the nonwoven fabric is not particularly limited. The basis weight of the nonwoven fabric is not particularly limited, but 20 to 140 g / m ² is preferable.

<Fiber reinforced resin>
The fiber reinforced resin constituting the core material is obtained by impregnating a reinforcing resin with a matrix resin composition. That is, the core material consists of a cured product of the matrix resin composition and reinforcing fibers.

[Reinforcing fiber]
(Hard-cut fiber)
The reinforcing fibers constituting the fiber reinforced resin include difficult-to-cut fibers having difficult-to-cut properties. The hard-to-cut fiber in the present invention is a fiber other than glass fiber and has a property that is difficult to cut with a blade. Specifically, a fiber having high toughness is used. Here, toughness refers to the tenacity of the material, and in order to express toughness quantitatively, the value of “total strain energy” corresponding to the area surrounded by the breaking point in the fiber stress-strain line curve is used. Yes (reference: FRP glossary, reinforced plastics association, 1983, p. 76). The larger the “total strain energy” value, the higher the toughness and the harder to cut. Specifically, the hard-cut fiber has a total strain energy per unit area and unit length of preferably 5 N · mm or more, more preferably 10 N · mm, and even more preferably 15 N · mm or more.

  Specific examples of the difficult-to-cut fibers include aramid fibers, polyethylene fibers, polyester fibers, polyparaphenylene benzobisoxazole fibers (PBO fibers), polyvinyl alcohol fibers (PVA fibers), and metal fibers. Hardly cut fibers may be used alone or in combination of two or more.

  Among the above, aramid fibers and metal fibers are particularly preferable from the viewpoint of cutting strength. Specific examples of the metal fiber include copper wire, aluminum wire, steel wire (including piano wire) and the like.

  From the viewpoint of hardly causing radio interference, one or more non-metallic fibers selected from aramid fibers, polyethylene fibers, polyester fibers, polyparaphenylene benzobisoxazole fibers and polyvinyl alcohol fibers are preferable.

  The difficult-to-cut fibers are continuous fibers (long fibers), short fibers, or cloth materials, and are arranged so that the difficult-to-cut fibers exist in the entire length direction of the core material. The thickness of the difficult-to-cut fiber is not particularly limited as long as the desired cut-resistant strength can be obtained. However, in consideration of manufacturability and cost, the fineness of the non-metallic fiber is preferably about 5 to 15000 tex. In the case of metal fibers, the wire diameter is preferably about 0.1 to 4 mm.

  In addition, the nonwoven fabric which is the form in which the monofilament was entangled is not contained in the reinforcing fiber in this invention.

(Glass fiber)
In addition to the above-mentioned hard-to-cut fibers, the reinforcing fibers may include glass fibers. The glass fiber may be either a short fiber or a long fiber. Glass fibers include yarns made of E-glass fibers, S-glass fibers, alkali-resistant glass fibers, rovings, roving cloths, knitted fabrics, blinds, CSM (continuous strand mat), CM (chopped strands). -Mat), knit mat, and strand are more preferable. The filament diameter of the glass fiber is preferably 6 to 35 μm (preferably 11 to 27 μm), and the strand count of 100 to 10,000 tex.

  The ratio of difficult-to-cut fibers to the entire reinforcing fibers contained in the fiber reinforced resin is determined within a range in which the required cut resistance can be achieved. When the difficult-to-cut fiber is a non-metallic fiber, the volume is preferably 5% by volume or more, more preferably 10% by volume or more, and further preferably 25% by volume or more. When the hard-to-cut fiber is a metal fiber, 0.2% by volume or more is preferable, 0.8% by volume or more is more preferable, and 1.3% by volume or more is more preferable. In any case, good cutting resistance of the protective fence can be obtained by setting the above lower limit value or more.

  Cutting resistance improves as the proportion of hard-cutting fibers in the entire reinforcing fiber increases. The upper limit of the ratio of the difficult-to-cut fibers may be 100% by volume, but from the viewpoint of cost reduction, it is preferable to reduce the ratio of the difficult-to-cut fibers as long as the required cutting resistance can be achieved. For example, the ratio of the hard-cut fiber is preferably 95% by volume or less, more preferably 70% by volume or less, and further preferably 60% by volume or less.

[Matrix resin composition]
The matrix resin composition contains a matrix resin as a main component and other additives as necessary.

  As the matrix resin, any of a thermosetting resin and a thermoplastic resin can be used and is not particularly limited. For example, thermosetting resins such as epoxy resin, unsaturated polyester resin, vinyl ester resin, phenol resin, urethane acrylate, polyester acrylate, diallyl phthalate; heat such as nylon resin, polyether ketone resin, polyphenyl sulfone resin, polyimide resin A plastic resin is mentioned. These resins may be used alone or in combination of two or more. Among these, thermosetting resins such as unsaturated polyester resins, vinyl ester resins, and epoxy resins are preferable.

  Known additives can be appropriately used as additives to be added to the matrix resin composition. Specific examples include fillers, curing agents, mold release agents, colorants and the like.

  In the fiber reinforced resin (100% by volume) according to the present invention, the reinforcing fiber content is preferably 30 to 80% by volume, more preferably 40 to 70% by volume, and still more preferably 45 to 65% by volume. By setting the content of the reinforcing fiber to be equal to or higher than the lower limit of the above range, good tensile strength and bending strength in the protective fence can be obtained. By setting it to the upper limit of the above range or less, the quantitative balance between the reinforcing fiber and the matrix resin composition is improved, and good moldability, tensile strength and bending strength can be obtained.

[Production method]
The method for producing a protective fence by curing a fiber reinforced resin can be produced by a molding method including a step of impregnating a matrix resin composition into a reinforcing fiber, molding the matrix resin composition into a desired shape, and curing the matrix resin composition. Specific molding methods include hand lay-up molding, resin injection molding, filament winding molding, pultrusion molding, press molding, extrusion molding, injection molding, infusion molding, and sheet winding molding. Etc. Among these, the filament winding molding method, the sheet winding molding method, and the pultrusion molding method are preferable from the viewpoint of good productivity, and the pultrusion molding method is particularly preferable from the viewpoint of continuous molding.

  When manufacturing by a pultrusion molding method, specifically, these fibers are impregnated with the matrix resin composition by passing through the matrix resin composition while pulling the hard-cut fibers and the glass fibers at a predetermined speed. Subsequently, the difficult-to-cut fibers and glass fibers impregnated with the matrix resin composition are introduced into a heat-molding mold together with the nonwoven fabric, and the matrix resin is cured while passing through the mold. At this time, in the cross section perpendicular to the traveling direction in the thermoforming mold, the guide is placed so that the periphery of the reinforcing fibers (hardly cut fibers and glass fibers) impregnated with the matrix resin composition is surrounded by the nonwoven fabric. Used to guide the reinforcing fiber and the non-woven fabric into the heating mold.

  In the thermoforming mold, the matrix resin composition is cured in a state where the matrix resin composition is also impregnated into the nonwoven fabric to form a long cured product. The cured product is continuously pulled out by a pulling device. The obtained long cured product is cut to form a protective fence.

  The protective fence 10 of this embodiment includes a core material cured after impregnating a reinforcing fiber with a matrix resin composition, and a surface layer cured after impregnating the nonwoven resin with a matrix resin composition. Therefore, it is superior in corrosion resistance compared to a metal protective fence.

  In addition, in embodiment, although the protective fence 10 used as an airport fence was demonstrated, a use is not limited to this, It can apply also as a protective fence surrounding other facilities, such as a park and a stadium. .

The perspective view which showed an example of the protection fence which concerns on embodiment Assembly perspective view of the guard fence shown in FIG. The main part enlarged front view of the guard fence shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Guard fence, 12 ... Base, 14 ... Post, 16 ... Trunk edge, 18 ... Insertion hole, 20 ... Lattice, 22 ... Insertion hole, 24 ... Trunk joint, 26 ... Creeping part, 28 ... Shinobi

Claims (1)

A plurality of pillars erected in the vertical direction, a plurality of trunk edges bridged horizontally between the plurality of pillars, and an insertion hole formed at a predetermined interval in the plurality of trunk edges In a protective fence with a plurality of lattices that are inserted and vertically installed,
A protective fence, wherein a diameter of the grid is 5 mm or more and 32 mm or less, and an interval between adjacent grids is 15 mm or more and 90 mm or less.

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