JP2001128611A - Protective fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive protective fence which can easily be built without needing an expertise and can surely obstruct the invasion of mild animals and so on. SOLUTION: This protective fence in which net-like members 2(2a, 2b) are stretched around through supports 1, 1, ... disposed at a prescribed distance, is characterized in that the net-like members 2(2a, 2b) are formed from flat, net-like, expandable metal plates each having a prescribed shape and size, whereby the characteristics of the lightweight and durable expandable metal mesh structure are utilized to give a structure especially suitable for obstructing wild animals and so on in a farm land.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective fence, and more particularly to a protective fence suitable for preventing invasion of wild animals and the like into agricultural lands.

[0002]

2. Description of the Related Art Damage (eating damage) that wild animals eat agricultural crops has been reported in various parts of the country. Among them, there is human damage such as bears attacking humans. Wild boars, deer and monkeys are the most common wildlife causing damage, and there are also reports of weasels and raccoons.

In recent years, such damage by wildlife such as food damage has tended to occur not only in winter, when the amount of food for wildlife is low in the mountains as in the past, but throughout the year regardless of the season. The fact is that the number of cases is gradually increasing.

[0004] The causes of damage caused by wild animals are diverse, but the number of humans entering and leaving mountainous areas is much smaller than before, and the range of living (behavior) of wild animals is close to the area where humans live. The spread of wildlife has increased due to the spread of animal welfare and hunters,
In addition, the nutritional status of animals is improved by using agricultural products as food, and the number of heads is increased due to a decrease in the childhood mortality of offspring of these wild animals.

[0005] These damages caused by wild animals not only threaten the fundamentals of the livelihoods of farmers, but are also promptly resolved in recent years, as mobilization of tourists to mountainous areas and the like has been observed due to the growing interest in returning to nature. It is becoming a serious social issue.

[0006] From such a viewpoint, each local government has been actively conducting various investigations and researches on measures to prevent the above-mentioned damages, but so far unified, effective and drastic solutions. Has not yet been established, and the most effective preventive measure is to use a protective fence.

[0007] The protective fence is intended to prevent the invasion of wild animals into the fields by, for example, laying a net-like fence, that is, a net, around the fields where the crops are grown. Wire fences, fishing nets (seaweed nets) fences, electric fences, etc. have been adopted as species of protection fences.

[0008] The wire mesh fence uses a wire mesh formed by weaving a metal wire such as a wire or an iron wire into various meshes as a net-like body. The metal wire is coated with vinyl to have corrosion resistance. Are the mainstream. In this wire mesh fence, the area of the opening of the mesh of the wire mesh is set in correspondence with the wildlife to be prevented from entering, and the structure is such that the entry of animals larger than the size of the opening is prevented.

The fishing net fence uses a fishing net used in the fishery as a net-like body, and this fish net is formed by knitting a nylon thread or the like into a net. The opening area of the mesh of the fish net is set corresponding to the wildlife to be prevented from entering, as in the case of the wire net of the wire mesh fence.

[0010] The electric fence is formed into a net-like body formed by knitting conductive wires, specifically, a net-like form in which a plurality of conductive wires are stretched at predetermined intervals substantially in parallel with the ground surface. The conductive wire is energized, and the prevention of invasion of wild animals is achieved by an electric shock accompanying the contact of the wild animals with the mesh.

[0011]

However, each of the conventional protective fences has the following problems, and improvement thereof has been desired.

(1) In a wire mesh fence, a mesh is formed by knitting a metal wire as described above. Therefore, if a part of the mesh is once broken by an animal or the like, it is damaged. The opening area of the mesh gradually widens from, eventually allowing invasion of wild animals,
There was a problem that the function as a protective fence was lost.

[0013] Further, since the wire net as a net-like body is long in manufacturing, when the wire net fence is constructed, the long wire mesh is once wound into a coil shape and transported to the construction site.
At the construction site, the work is spread again and the construction is performed sequentially by a predetermined length. However, the construction at this site takes time and is inefficient.

Further, as described above, most wire meshes are coated with vinyl to have corrosion resistance.
The actual corrosion resistance period is several years, and there is a problem that the maintenance cost is further increased after the lapse of the corrosion resistance period.

Further, in the case of a wire mesh fence, since the wire mesh must be sequentially constructed, there is a problem that the construction takes a long time when the construction distance (the range enclosed by the protective fence) is long. Further, the wire mesh used is usually provided with a vinyl coating to improve the corrosion resistance. However, the corrosion resistance period is only several years at most, and there is a problem that maintenance costs for repair and the like increase after that.

(2) The fishing net fence can flexibly cope with a change in shape as compared with the wire mesh fence, so that it is easy to construct and the product price is inexpensive, but the strength is higher than that of the wire mesh fence. Because of their small size, they can be easily bitten by wildlife, and the net itself can become entangled with animals. Because of this,
There were problems such as damage to the net, permitting invasion of wildlife, losing its function as a protective fence, and injuring wildlife.

(3) The electric fence initially supplied power from the garden of a general dwelling, but recently the use of a solar cell has reduced the power supply cost and has prevented electricity supply due to contact with weeds and the like. Although improved products are being commercialized and supplied, not only will they be expensive due to the need for power supply equipment according to the construction distance, but also some degree of expertise will be required for maintenance of these equipment Therefore, there was a problem that its introduction was not easy.

In the case of an electric fence, as described above, a plurality of conductive wires are arranged in parallel with the surface of the ground. However, invasion of animals smaller than the arrangement interval cannot be prevented. There was a problem that an entrance could be provided only in the place.

In addition, the electric fence may cause electric shock not only to the target wildlife but also to humans, and there is a problem in terms of safety measures.

The present invention has been made in view of the above problems, and has as its object to be able to easily perform construction without requiring specialized knowledge and to ensure the invasion of wild animals. To provide an inexpensive protective fence that can be blocked.

[0021]

In order to achieve the above-mentioned object, a protective fence of the present invention is a protective fence in which a net-like body is stretched through struts arranged at predetermined intervals, The net-like body is characterized in that it is made of a flat net-like plate made of expanded metal having a predetermined shape and size.

In a preferred embodiment, the mesh is formed in a rectangular shape having a predetermined size, and an opening area of the mesh is set in correspondence with a wild animal to be prevented from entering. As the expanded metal forming the mesh, a pre-plated metal obtained by applying a plating treatment to a surface of a thin steel plate and then expanding it into a predetermined mesh shape is used.

A plurality of the struts are erected at intervals corresponding to the width of the rectangular net-like body, and the net-like body is stretched in a bridging manner between these adjacent struts. Both end edges of each mesh body supported and fixed to the support are overlapped with one end edge of an adjacent mesh body, and these overlapping portions are fastened and fixed to the support by the mounting bracket. In this case, it is desirable that the meshes of the two meshes be positioned in contact with each other in the vertical direction and the width direction in the overlapping portion of the mesh. In addition, depending on the purpose, a lower end portion of the mesh body that comes into contact with the ground surface is a soil moat intrusion prevention portion that is bent toward the outside of the fence.

[0024] Further, the mounting bracket comprises a metal fitting body for engaging the support post and the mesh body together in a tightening manner, and a tightening bolt for abuttingly engaging with the support post and tightening and fixing the metal fitting body. The metal fitting body is made of a metal plate that is bent into a substantially U-shape that fits into the support column in a holding manner, and has a pair of engaging arms that respectively engage with the mesh of the mesh body. A fastening base that forms a connecting portion of the engaging arm and is screwed so that the fastening screw can be advanced and retracted.

[0025] The protective fence of the present invention, whose main component is a net-like body made of a flat net-like plate made of expanded metal, is particularly suitable for preventing invasion of wild animals and the like into agricultural lands. Applied as a protective fence.

That is, the expanded metal is formed by expanding a metal plate into a rhombic or tortoise-shaped mesh. Unlike a general mesh, any portion of the mesh is a welded portion of constituent wires intersecting with each other. It is an integrally molded product having no fastening parts and no fastening parts, and has a structurally lightweight and robust mesh structure. Taking advantage of this characteristic, by setting the opening area of each mesh of the mesh corresponding to the wildlife to be prevented from entering, it is possible to prevent the entry of animals larger than the size of the opening. Can address most of the wild animals currently reported to be affected.

Since the mesh has a robust mesh structure as described above, there is little danger of being cut off by wild animals, and even if a part of the mesh is damaged, the opening does not expand and the protective fence does not spread. Function is maintained stably.

In addition, since each net is light in weight, the workability at the construction site is good, and since it has excellent strength and corrosion resistance, it can withstand long-term use and is very economical including maintenance. It is.

Both end edges of each net are overlapped with one end edge of an adjacent net, and meshes of both nets are brought into contact with each other in the vertical and width directions in these overlapping portions. By being positioned, the overlapped portion has the appearance of a single plate due to the mesh structural characteristics, and the strength for fixing the support to the column is high.

Since the overlapping portion is fastened and fixed to the column by a single mounting bracket, the fixing operation is easy, and the protective fence can be simultaneously assembled from any place, thereby improving the conventional protective protection. Work efficiency is better than fences.

The mounting bracket has a simple structure as described above, does not require any special skills, tools, or specialized knowledge, and can be easily mounted, assembled, disassembled and disassembled even by an amateur. It is also easy to provide an entrance or the like at the location.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A protective fence according to the present invention and a method for constructing the same will be described below in detail with reference to the drawings.

Embodiment 1 A protective fence according to the present invention is shown in FIGS. 1 to 8, and specifically, this protective fence is for preventing invasion of wild animals and the like into agricultural lands. , Are braided through support columns 1, 1, ... arranged at predetermined intervals.

The support 1 serves as a support for mounting the net 2 and is specifically made of a metal rod. In the illustrated embodiment, the support 1 is shown in FIGS. A metal pipe made of such a lightweight cylindrical metal is used. As will be described later, each of the columns 1 is erected at a construction site with an interval corresponding to the width dimension (lateral dimension) W of the mesh body 2 and forms a planar contour of a protective fence to be constructed.

The reticulated body 2 forms a protective wall for preventing invasion of wild animals and the like, and specifically, is an expanded metal having a predetermined shape and size.
And a flat net-like plate member made of

The expanded metal constituting the net 2 has a conventionally well-known structure. Specifically, a steel plate having a thickness of about several millimeters is expanded into a rhombic or turtle-shaped mesh. This expanded metal is an integrally molded product in which there is no welded portion or a tightened portion of constituent wires intersecting with each other in any portion of the mesh, and has a structurally lightweight and robust mesh structure.

The reticulated body 2 is formed by cutting the expanded metal into a rectangular shape having a predetermined size, and the opening area of the mesh is set corresponding to a wild animal to be prevented from entering. The specific shape and dimensions of the mesh body 2 are set in consideration of the material and weight of the expanded metal as a constituent member so that only one worker can have it.

In the illustrated embodiment, the vertical dimension H is 9
An upper mesh 2a (about 2.6 kg in weight) having a rectangular shape of 20 mm and a horizontal dimension W of 2500 mm;
Is a lower reticulated body 2b having a rectangular shape of 1220 mm (720 mm + 500 mm) and a horizontal dimension W of 2500 mm.
(A weight of about 3.5 kg), and in each of the meshes 2a and 2b, as shown in FIG. 4, each mesh has a maximum vertical dimension h of about 86.5 mm and a maximum horizontal dimension w. Is set to about 48.0 mm, and is formed in a substantially rhombic shape.

The expanded metal forming the reticulated body 2 of the illustrated embodiment is a so-called pre-plating obtained by preliminarily plating a surface of a thin steel plate and then expanding the same into a rhombic mesh. A type (for example, a product name “Dymouth-Per Expanded Metal” manufactured by Kansai Tekko Co., Ltd.) is employed. The pre-plated type expanded metal has characteristics that it is excellent in corrosion resistance and has a long life as compared with a conventional general so-called post-plated type.

As shown in FIG. 1, the meshes 2 (2a, 2b) made of expanded metal have columns 1, 1,... Corresponding to the width W of the meshes 2 at the construction site. The upper and lower meshes 2a and 2b are laid in a bridge shape between the adjacent pillars 1 and 1, respectively. A protective fence will be formed.

More specifically, each net 2 (2a, 2b)
Is disposed so as to be substantially parallel to the ground surface G, and is a gap between the upper and lower two-tiered nets 2a and 2b such that a target wild animal cannot enter (in the illustrated embodiment, A gap L of about 400 mm in the height direction is provided.

Each net 2 supported and fixed on the support 1
Both end edges 5, 6 of (2a, 2b)
Are overlapped with one end edge 5 or 6 with a predetermined width dimension, and these overlapping portions 7 are fixedly supported and fixed together with the support column 1 by the mounting bracket 8, and a protective fence integrally continuous in the horizontal direction is formed. It is formed. The width dimension of the overlapping portion 7 can be adjusted by appropriately increasing or decreasing the number of meshes to be overlapped.
An error in the dimension of the interval between them is effectively absorbed.

As shown in FIG. 8, the lower end mesh portion 2b of the lower mesh portion 2b, which is in contact with the ground surface G of the mesh portion 2, is formed as an earth moat intrusion prevention portion bent toward the outside of the fence. ing. The provision of the soil moat intrusion prevention part 3 is a measure for a four-legged wild animal having a habit of digging a hole at the lower end of the protective fence to form a hole. By adopting such a structure, when the four-legged wild animal tries to dig the soil with his nose while stepping on his forefoot, his own forefoot rides on the earthenware intrusion prevention part 3 and Inability to enter the fence is impossible. In the illustrated embodiment, the soil moat intrusion prevention portion 3 is set to have a width of about 50 cm.

Further, taking advantage of the structural characteristics of the expanded metal, the meshes of the two reticulated bodies 2 in the respective overlapping portions 7 of the reticulated bodies 2 (2a, 2b) are formed as shown in FIG.
Positioning is performed by abutting engagement in the up-down direction and the width direction, and by adopting such a superposed structure, as shown in FIGS. There is an advantage that the support fixing strength to 1 is also increased.

The mounting bracket 8 is for fastening the mesh 2 by hooking it from the back side of the column 1 and its concrete structure is shown in FIG. 6, and is composed of a bracket main body 10 and a tightening bolt 11. .

The metal fitting body 10 is used to fasten the support column 1 and the net-like body 2 together. Specifically, as shown in FIG.
It is made of a metal plate bent into a substantially U-shape to be fitted to the column 1. The metal fitting body 10 includes a pair of engaging arms 10a, 1 respectively engaging with the mesh of the mesh body 2.
0a and a tightening base 10b forming a connecting portion between the two engaging arms 10a, 10a.
The fastening bolt 11 is screwed so as to be able to advance and retreat.

The distance between the two hooked arms 10a, 10a is
Engagement portions 12 are set so that they can be fitted to both sides of the column 1 in a holding manner, and each of the engagement arm portions 10a, 10a is provided with an engagement portion 12 that can be inserted into and hooked on the mesh of the mesh body 2. Have been. The specific structure of the engaging portion 12 is in the form of a substantially U-shaped notch groove which is open at the top and inclined upward toward the rear.
2 and 12 can be hooked on the mesh of the mesh body 2. Further, the fastening base 10c is provided with a double-engagement arm 10a,
It has a flat shape perpendicular to 10a, and a tightening bolt 11 is screwed at its center position.

The fastening bolt 11 has a tip end surface abuttingly engaged with the back side of the column 1 to fasten and fix the metal fitting body 10. Specifically, as shown in FIG. It is in the form of a wing bolt that can be manually operated by the user.

Then, the adjacent net 2 (2a, 2b)
In a state where the overlapping portion 7 of
After inserting the overlapped portion 7 of the mesh body 2 to the front side by sandwiching the double-armed arms 10a, 10a of the mounting bracket 8 from the back side of the column 1 so as to hold the column 1, the double-locked arms 10a, 10
The notch grooves 12, a of FIG. In this state, by tightening the tightening bolts 11 with fingers, the overlapped portion 7 of the mesh body 2 is fastened and fixed to the column 1 together.

In connection with this, the upper-stage net-like body 2a
Is supported on the column 1 in a suspended manner by the suspension fittings 15. Specifically, the hanging metal 15 is made of metal wire S
In the illustrated embodiment, it is formed of a metal round bar having a diameter of about 4 mm.

As shown in FIG. 2, the hanging bracket 15 is hooked by a lower end 15a to an appropriate portion of the mesh of the net 2a, and its upper end 15b is hooked to an outer portion of the upper edge 1a of the column 1. By stopping, the mesh 2 is supported and fixed to the column 1 in a suspended manner.

Next, a method of constructing a protective fence using the components configured as described above will be described (see FIG. 7).

A. Stretching assembly of the meshes 2b, 2b in the lower part
Standing: Supports 1, 1,...
With a certain interval corresponding to the width dimension of (2a, 2b),
It is buried vertically. This defines the planar contour of the guard fence to be constructed.

In this case, the lower end portion 1b of the column 1 is driven into the ground by a predetermined size (about 500 mm in the illustrated embodiment) and is buried and fixed. When strut 1 cannot be driven directly into the ground due to the geology of the construction site,
After forming a pilot hole for driving in advance, the strut 1 is driven.

After the lower mesh members 2b, 2b,... Are leaned on the outer sides between the adjacent columns 1, 1, in this state,
The edge portions 5, 6 of the adjacent nets 2b, 2b are overlapped with a predetermined width dimension (see FIG. 7A).

The polymerized portions 7 of the nets 2b, 2b
(See FIG. 7 (b)) in a state in which the mesh member 2 is in contact with the column 1 and the mesh 2
After pulling in to the back side (see FIG. 7 (c)), the tightening bolts 11 of the mounting brackets 8 are tightened with fingers to form the mesh members 2b, 2b.
The overlapping portion 7b is fastened and fixed to the column 1 in a co-fastened manner (see FIG. 3). The fastening portions of the overlapping portion 7 with the mounting brackets 8 are two appropriate portions in the vertical direction.

The above procedure is sequentially repeated so that the lower mesh members 2 b and 2
b, ... are assembled.

B. Stretching set of upper-layer nets 2a, 2a
Standing: At the upper edge 1a of each column 1, the upper end 1 of the hanging bracket 15
5b is hooked, and the hanging bracket 15 is attached.

The upper mesh member 2 a is hung from the outside between the adjacent columns 1, 1 to the lower end portion 15 a of the hanging member 15 in a suspended manner. In this case, the adjacent nets 2a, 2
The edge portions 5 and 6 are affixed while being positioned so as to overlap each other with a predetermined width.

Thereafter, the end portions 5 and 6 are overlapped with each other (see FIG. 7A), and
With the overlapping portion 7 of a and 2a (see FIG. 7 (b)) in contact with the column 1, an appropriate portion under the overlapping portion 7 is moved to the back side of the column 1 in the manner described above by the mounting bracket 8. After being pulled in (see FIG. 7 (c)), the fastening bolts 11 of the mounting brackets 8 are tightened by hand and the overlapping portions 7 of the nets 2a, 2a are fastened and fixed to the support column 1 together (FIG. 3).

The above procedure is sequentially repeated to cover the entire length of the protective fence to be constructed, ie, the upper mesh members 2 a, 2
a, ... are stretched and assembled.

The protective fence is constructed over the entire length by a series of stretching and assembly of the mesh members 2a and 2b in the upper and lower steps, but the steps A and B are performed in reverse order. May be. Further, in the work of stretching the mesh member 2a in the upper part, the mesh member 2a is supported in advance in a suspended state by using the hanging metal fittings 15, so that the operation becomes simple and easy.
Of course, the upper end edge portion of the net-like body 2a in the upper stage may be fastened and fixed by the mounting bracket 8.

In the protective fence constructed as described above, however, the net 2 (2a, 2
b) is made of a flat net-like plate made of expanded metal, and can reliably prevent invasion of wild animals and the like to the agricultural land.

That is, the expanded metal is different from a general net-like body formed by knitting a wire such as a wire net or a fish net, and there is no welded portion or tightened portion of the constituent wires intersecting with each other in any portion of the mesh. It is an integrally molded product and has a structurally lightweight and robust mesh structure.

In the present embodiment, the opening area of each mesh of the reticulated body 2 (2a, 2b) is set in accordance with the wildlife to be prevented from entering by taking advantage of the characteristics of the expanded metal. Thus, it is possible to reliably prevent an animal having a size larger than the size of the opening of the mesh from entering.

Furthermore, since the mesh 2 (2a, 2b) has a robust mesh structure as described above, there is little danger of being cut off by wild animals, and even if a part of the mesh is damaged, its opening is reduced. The function as a protective fence can be stably maintained for a long time without the part being spread.

The net-like body 2 (2a, 2b) is designed to have a lightweight structure that can be held by one worker, and the workability at the construction site is good, and the strength and corrosion resistance are high. Because it is excellent in long-term use, it is very economical including maintenance. This effect
In particular, the use of a pre-plated type as the expanded metal becomes more remarkable.

Further, both end portions 5 and 6 of each mesh 2 (2a, 2b) are overlapped with one edge 5 or 6 of the adjacent mesh, and the two meshes 2 ( Since the meshes 2a and 2b) are positioned in contact with each other in the up-down direction and the width direction, the overlapped portion 7 looks like a single plate from the structural characteristics of the mesh (see FIGS. 3 and 4). (See FIG. 5), and the support fixing strength to the column 1 is large.

Since the overlapped portion 7 is fixed to the support column 1 together with one mounting bracket 8, the fixing operation is easy, and the above-described construction procedure is restricted. In addition, it is possible to simultaneously assemble the protective fence from any place, and the work efficiency is extremely good as compared with the conventional protective fence.

The mounting bracket 8 has a simple structure as described above, and therefore requires no special skills, tools, or specialized knowledge for its handling, and can be easily mounted and assembled even by an amateur. And can be dismantled. As a result, it is easy to provide an entrance or the like at any desired location as needed.

Embodiment 2 This embodiment is shown in FIGS. 9 and 10, in which a rod-shaped body made of lightweight steel is used as the column 1 in Embodiment 1.

That is, as shown in FIGS. 9 and 10, the column 1 of this embodiment is made of a lightweight steel bar having a U-shaped cross section. Correspondingly, the manner of use of the hanging hardware 15 is different from that of the first embodiment.

More specifically, as shown in FIG.
Are installed at the construction site such that the open side of the U-shaped section faces outward. The hanging bracket 15 has a lower end 15a.
By hooking the upper end portion 15b of the mesh member 2a on the mesh at an appropriate portion of the mesh member 2a and the rear end portion of the upper end edge 1a of the support column 1 from the outside, the hanging fitting 15 is accommodated inside the support column 1. The net 2 is supported and fixed to the column 1 in a suspended manner. Thus, unlike the case of the first embodiment, the support 1 and the mesh 2 are brought into close contact with each other even at the mounting position of the hanging metal 15.

Further, the fastening bolt 11 of the mounting bracket 8 has its tip end surface abuttingly engaging with the flat back surface of the column 1 to fasten and fix the bracket main body 10. Other configurations and operations are the same as those of the first embodiment.

The above-described Embodiments 1 and 2 merely show preferred embodiments of the present invention.
The present invention is not limited to this, and various design changes can be made within the scope of the invention.

For example, in Embodiments 1 and 2 shown in the drawings, the meshes 2 (2a, 2b) are stretched vertically in two stages, but the number of installation stages of the meshes 2 in the vertical direction is not shown. The present invention is not limited to this, and can be appropriately increased or decreased according to the purpose, such as a single-stage stretched structure or a three-stage or four-stage stretch structure.

In the illustrated first and second embodiments,
A lower end portion of the lower net 2b is bent outward to form an earth moat intrusion prevention portion 3, but in accordance with the habit of the target wildlife, a flat plate similar to the upper net 2a is formed. May be.

Further, the expanded metal forming the net 2 (2a, 2b) is not a pre-plated type as in the first and second embodiments shown in FIG. May be.

Although the protective fence of the present invention is optimal for preventing invasion of wild animals and the like as shown in the illustrated embodiment, its use is not particularly limited to this, and it is not limited to this. And widespread use is expected.

[0080]

As described in detail above, according to the present invention,
Since the net, which is a main component of the protective fence, is made of a flat net-like plate made of expanded metal having a predetermined shape and dimensions, various effects as listed below are obtained, It is possible to provide an inexpensive protective fence that can be easily constructed without requiring knowledge and that can reliably prevent invasion of wildlife.

(1) When the net, which is the main component of the protective fence, is made of a flat net-like plate made of expanded metal, it is used as a protective fence for preventing wild animals from entering agricultural land. By setting the opening area of each mesh of the mesh in accordance with the wildlife to be prevented from entering, the invasion of animals larger than the size of the opening can be surely prevented. Can address most of the reported wildlife.

(2) An integrally molded product in which there is no welded portion or a tightened portion of a wire rod which intersects any part of the mesh of the net-like body, and has a structurally lightweight and robust mesh structure. Therefore, even if a part of the mesh is damaged, the opening does not widen, and the function as the protective fence can be stably secured. For example,
Even when applied as a protective fence for preventing invasion of wildlife as described above, there is very little risk of wildlife getting entangled or being cut off by wildlife.

(3) Since each net is lightweight, the workability at the construction site is good and the workability is excellent.

(4) Since the reticulated body is less corroded and has excellent corrosion resistance and high strength, it can be used in ordinary places.
It is expected to be durable for more than one year, and a maintenance-free protective fence can be constructed. In particular, by adopting a pre-plated type expanded metal, the life is further extended.

(5) Both end edges of each net are overlapped with one end edge of the adjacent net, and the meshes of both nets are abutted in the vertical direction and the width direction in these overlapping portions. Due to the structure that is positioned together, due to the structural characteristics of the expanded metal mesh, a large step does not occur in the overlapping portion, and it has a simple and clean appearance like a single plate, It is also possible to obtain a support fixing strength to a large support.

(6) Since the overlapping portion is fastened and fixed to the column by a single mounting bracket, the fixing operation is easy, and the protective fence can be assembled simultaneously from any place. Work efficiency is better than conventional protective fences.

(7) By using the mounting bracket having a simple structure, no special skills, tools, or specialized knowledge are required at all, and even an amateur can easily mount, disassemble, disassemble, and disassemble the apparatus at any desired place. It is also easy to provide an entrance or the like.

(8) Unlike conventional electric fences, there is no danger of electric shock because no electricity is used, and no power supply is required. It is very economical, including management.

[Brief description of the drawings]

FIG. 1 is a front view showing the entire configuration of a protective fence according to Embodiment 1 of the present invention.

FIG. 2 is a side cross-sectional view showing a partially cut-away state of the net-like body with respect to a supporting column fixed by a hanging metal fitting in the protective fence.

FIG. 3 is a plan sectional view showing a partially fixed state in which the mesh member is fastened and fixed to a support column by a mounting bracket in the same protective fence.

FIG. 4 is an enlarged view showing a mesh structure of expanded metal constituting a net of the protective fence, wherein FIG. 4 (a) is a front view, and FIG. 4 (b) is BB of FIG. 4 (a). It is a plane sectional view along a line.

FIG. 5 is a front view showing a superposed portion of a mesh body adjacent to the protective fence.

FIG. 6 is a perspective view showing a mounting bracket in the protective fence.

FIG. 7 is a plan sectional view for explaining a construction procedure of the protective fence.

FIG. 8 is a perspective view showing an arrangement of upper and lower meshes of the protective fence.

FIG. 9 is a side sectional view corresponding to FIG. 2 and showing a main part of a protective fence according to Embodiment 2 of the present invention.

FIG. 10 is a plan sectional view corresponding to FIG. 3, showing another main part of the same protective fence.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support 1a Upper end edge of support 2 (2a, 2b) Reticulated body 3 Intrusion prevention part 5, 6 Edge of reticulated body 7 Overlap portion of reticulated body 8 Mounting bracket 10 Metal fitting body 11 Fastening bolt 15 Hanging bracket

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[Procedure amendment]

[Submission date] November 10, 1999 (1999.11.
10)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG. 3

FIG.

FIG. 2

FIG. 4

FIG. 5

FIG. 6

FIG. 7

FIG. 8

FIG. 9

FIG. 10

Claims (7)

[Claims] 1. A protective fence comprising a mesh member stretched through struts provided at a predetermined interval, wherein the mesh member has a flat net-like shape made of expanded metal having a predetermined shape and size. A protective fence characterized by being made of plate material. 2. The net-like body is formed in a rectangular shape having a predetermined dimension, and an opening area of the mesh is set corresponding to a wild animal to be prevented from entering. The protective fence according to claim 1. 3. The expanded metal forming the net-like body, after a plating treatment is performed on a surface of a thin steel plate,
The protective fence according to claim 1 or 2, wherein the protective fence is of a pre-plating type that is spread in a predetermined mesh shape. 4. A plurality of pillars are erected at intervals corresponding to the width of the rectangular net-like body.
The mesh body is stretched in a bridging manner between these adjacent pillars, and both end edges of each mesh body supported and fixed to the pillar,
While being overlapped with one end edge of the adjacent net,
The protective fence according to claim 2 or 3, wherein these overlapping portions are fixed together by being fastened to the column by mounting brackets. 5. The overlapping portion of the reticulated body, wherein the meshes of the two reticulated bodies are positioned in contact with each other in a vertical direction and a width direction.
The protective fence described in. 6. The mounting bracket comprises: a bracket main body for engaging the support post and the mesh body together in a tightening manner; and a tightening bolt for abuttingly engaging with the support post and tightening and fixing the bracket main body. The metal fitting body is made of a metal plate that is bent into a substantially U-shape that fits into the support column in a holding manner, and a pair of engaging arms that respectively engage with meshes of the mesh body. The protective fence according to claim 4 or 5, wherein a connecting portion of the engaging arm portion is formed, and the tightening screw is configured to include a tightening base that can be screwed forward and backward. 7. The earth-boring intrusion prevention portion formed at the lower end portion of the net-like body that comes into contact with the ground surface is bent toward the outside of the fence. Protective fence described in one.