JP7361391B2 - Device to prevent damage caused by herbivores - Google Patents

Description

The present invention relates to, for example, a device for preventing damage caused by herbivorous animals.

In order to prevent damage caused by herbivorous animals that hinder the greening of protected areas, the applicant has proposed and implemented a feeding damage prevention device that uses spacers to keep nets floating in protected areas (patented). Reference 1).

Japanese Patent Application Publication No. 2004-73192

By the way, due to abnormal weather in recent years, record heavy snowfall has increased in many places in the winter, and when a large amount of snow accumulates on the above-mentioned food damage prevention device, the weight of the snow can damage the spacer and mesh, making it difficult for the food damage prevention function to be sufficient after the snow melts. There have been cases where it has become difficult to demonstrate this ability.

The present invention has been made with the above-mentioned considerations in mind, and its purpose is to provide a device for preventing damage caused by herbivorous animals that can withstand unexpected heavy snow caused by recent abnormal weather and is semi-permanently effective. It is about providing.

In order to achieve the above object, a device for preventing feeding damage caused by herbivores according to the present invention is a device for preventing feeding damage caused by herbivores that covers a protected area with a net-like body, which has a spiral shape and has elasticity in the radial direction. The net-like body was held floating by utilizing the radial elastic force of the spacer (Claim 1).

In the device for preventing feeding damage caused by herbivores, the spacer may have a spiral shape with a spiral axis extending along the protected area (claim 2).

In the device for preventing feeding damage caused by herbivores, the spacer may have a spiral shape with a pitch larger than the outer diameter of the coil (claim 3), and the spacer may have a helical shape with a pitch larger than the outer diameter of the coil. It may take on a spiral shape that is larger than a wide range (Claim 4). Further, the spacer may have a spiral shape having a width W of the mesh of the mesh and a coil outer diameter D that satisfies the relationship 2W ² ≦D ² (Claim 5).

In the device for preventing feeding damage caused by herbivorous animals, the spacer may be made of a steel wire (claim 6), or may be coated with a resin (claim 7).

In the device for preventing damage caused by herbivores, the spacer may be extendable by connecting other spacers to both ends of the spacer (claim 8).

The present invention provides a device for preventing damage caused by herbivorous animals that can withstand unexpected heavy snow caused by recent abnormal weather and is semi-permanently effective.

That is, in the device for preventing feeding damage caused by herbivores of the invention according to each claim of the present application, the spacer has elasticity, and when it snows, it is possible to disperse the snow load by elastic deformation, and after the snow melts, the spacer elastically returns to its original state. This makes it easier to restore the pre-predation damage prevention effect that existed before snowfall, making it possible to withstand unexpectedly heavy snow caused by recent abnormal weather and maintain its effect semi-permanently.

In the device for preventing feeding damage caused by herbivores of the invention according to claim 2, the spacer extends in a spiral manner, and the pitch of the spiral and the outer diameter of the coil are appropriately set, and the mesh size (inside ), ensuring a large number of contact points between the net and the spacer, the load of the snow on the net and the spacer will be more easily dispersed, and the deformation of the spacer due to the compression of the snow will reach its elastic limit. After the snow melts, it elastically returns to its original state, making it easier to restore the anti-corrosion effect it had before snowfall.

In the device for preventing feeding damage caused by herbivores of the invention according to claim 3, the spacer that is easily elastically deformed in the radial direction easily adapts to the protected area, and the net-like body held by this spacer similarly adapts to the unevenness of the protected area. Since the snow load is easily dispersed over the entire prevention device (net, spacer), the effect of preventing damage due to snow accumulation is further enhanced.

In the device for preventing feeding damage caused by herbivores of the invention according to claims 4 and 5, the height of the portion of the spacer that projects upward from the mesh of the mesh is less than half the outer diameter of the coil of the spacer, and the floating of the mesh is prevented. It is possible to ensure the maintenance of equipment.

In the device for preventing feeding damage caused by herbivorous animals according to the sixth aspect of the invention, the durability of the wire is improved by using a steel wire as the wire. In addition, in the device for preventing feeding damage caused by herbivores of the invention according to claim 7, the wires of the spacer are coated with resin, so that corrosion and deterioration of the wires are prevented, and the elasticity of the spacer is maintained for a long period of time. In addition, by using a material with a low coefficient of friction for the resin, the slip resistance between the spacer and the net-like body is reduced, and workability is improved.

In the device for preventing feeding damage caused by herbivorous animals according to the eighth aspect of the invention, since a plurality of spacers are connected and extendable, it is easy to improve workability.

1 is an exploded perspective view schematically showing the configuration of a device for preventing feeding damage caused by herbivorous animals according to an embodiment of the present invention. FIG. 2 is a vertical cross-sectional view schematically showing the configuration of main parts of the prevention device. It is a photograph showing the state of use of a prototype of the prevention device.

Embodiments of the present invention will be described below with reference to the drawings.

The device for preventing feeding damage caused by herbivores (hereinafter referred to as the prevention device) shown in FIGS. 1 and 2 covers the protected area A (see FIG. 1) where greening is to be done with a net 1, thereby protecting against herbivores that interfere with greening. This is to prevent feeding damage caused by large herbivorous animals such as deer (for example, large herbivores such as deer). In the prevention device of this example, the mesh body 1 is held floating by the elastic spacer 2 (see also FIG. 3).

The protected area A is, for example, a slope, and is an area on which a vegetation surface has been formed or is about to be formed. In this example, as shown in FIG. 1, a net member 4 with bag-like bodies 3 attached at regular intervals in the longitudinal direction is laid in the protection area A so that each bag-like body 3 extends along the contour line. The bag-shaped body 3 contains a material effective for greening the protected area A (for example, a vegetation base material containing seeds and at least one of fertilizer, water retention material, and soil improvement material). to accommodate. However, various methods can be used to form the vegetated surface; for example, soil containing seeds such as soil around the site may be spread by spraying or the like. A thin cotton sheet containing materials effective for greening, such as seeds and fertilizer, may be integrally combined on the lower side of the net member 4. Further, the timing of forming the vegetation surface may be either before or after the installation of the prevention device.

The mesh body 1 is a rectangular wire mesh with a width of 2 m and a length of 15 m formed by weaving vertical lines and horizontal lines in a grid pattern. SWMGS-4, which is a galvanized iron wire with a wire diameter of 2.0 mm, is used for the vertical and horizontal lines. Furthermore, the mesh has a rectangular shape of 125 mm in width x 76 mm in height.

The spacer 2 is a member having a spiral shape with a length of 1.5 m and whose spiral (swivel) axis extends along the inclination direction of the protected area A (direction perpendicular to the contour line). A wire rod (wire diameter 3.2 mm) is used in which a steel wire rod (raw wire) is coated with a polyethylene resin having a low coefficient of friction. Further, although not shown, joint portions are provided at both ends of the spacer 2, and the spacer 2 can be extended by connecting the joint portions of other spacers to both ends.

The prevention device in this example can be installed either before or after the net member 4 has been laid in the protection area A (this can be done using an appropriate fixing device 5 such as an anchor pin (see Figure 2)). This can be done by providing the spacer 2 and the net-like body 1 in this order above the bag-like body 3 (on which the bag-like body 3 is attached). Note that the net-like body 1 may be fixed to the protection area A at both upper and lower ends thereof using appropriate fixing devices 5 such as anchor pins, and the spacer 2 may be appropriately attached to the net-like body 1 or the net member 4 using a connecting device such as a binding device. Just connect the parts. Like the net-like body 1, the spacer 2 may be fixed to the protection area A together with the net member 4 using the fixture 5 at a location where it contacts the protection area A. Furthermore, when a plurality of net-like bodies 1 are arranged in rows and columns in the protection area A, adjacent net-like bodies 1 may be connected to each other using appropriate connectors. On the other hand, when the spacers 2 are arranged to extend in the vertical direction of the net-like body 1, for example, a plurality of spacers 2 are connected so that the length corresponds to the length of the net-like body 1 arranged in the vertical direction. Bye.

In this way, the prevention device of this example can be basically installed by providing the spacer 2 and the net-like body 1 in this order above the protection area A, so that an increase in construction labor can be suppressed.

In addition, in the prevention device of this example, the mesh member 1 placed above the protection area A can reliably prevent feeding damage by deer etc. Once installed, there is almost no need for maintenance, making it very easy to manage.

Furthermore, in the prevention device of this example, the spacer 2 has elasticity, and when it snows, it can disperse the snow load by its elastic deformation, and after the snow melts, it returns to its elasticity, restoring the damage prevention effect before snow accumulation. Because it is easy to use, it can withstand unexpected heavy snow caused by recent abnormal weather, and can maintain its effectiveness semi-permanently.

In addition, in the prevention device of this example, there is something above the surface of the protection area A, specifically, between the surface of the protection area A and the net-like body 1, that prevents attacks from deer etc. and hinders the growth of plants. Since a plant growth space that does not exist is formed, the growth of the plants can be ensured, and the vegetation can be protected reliably.

Furthermore, if the spacer 2 holding the net-like body 1 has elasticity so that it becomes unstable when a deer or the like walks on the net-like body 1, for example, if the surface of the protected area A is a slope. In such cases, deer etc. cannot climb up the sloping net-like structure, and this also has the effect of keeping deer etc. away and preventing feeding damage by deer etc. This effect can be further improved if the net-like body 1 is given appropriate flexibility.

In addition, in the prevention device of this example, the spacer 2 extends in a spiral manner, and the pitch P of this spiral and the outer diameter D of the coil (both shown in FIG. 2) are set appropriately, and the mesh of the mesh body 1 is If the upper part of the spacer 2 is inserted into the joint (inside) to ensure a large number of contact points between the net-like body 1 and the spacer 2, the snow load applied to the net-like body 1 and the spacer 2 will be easily dispersed, and the snow load will be further reduced. The deformation of the spacer 2 due to the compression is kept within the elastic limit, and the spacer 2 returns elastically after the snow melts, making it easier to restore the damage prevention effect before snow accumulation.

Here, in the spacer 2 of this example, the pitch P is 360 mm and the coil outer diameter D is 85 mm (pitch P is 4 times or more the coil outer diameter D). By setting the pitch P>coil outer diameter D (preferably pitch P>coil outer diameter D×1.2), the spacer 2 is different from a normal compression coil spring in that the spacer 2 is It is easy to elastically deform in the radial direction.

In this way, in the prevention device of this example, the spacer 2 having a spiral shape has elasticity in both the helical (turning) axis direction and the radial direction, making it particularly easy to elastically deform in the radial direction. The net-like body 1 held by this spacer 2 also easily adapts to the unevenness of the protection area A, so that the snow load is applied to the entire prevention device (the net-like body 1, spacer 2). It is easier to disperse over the whole area, and the effect of preventing damage due to snow accumulation is increased accordingly.

On the other hand, when making the spacer 2 fit into (inside) the mesh of the net-like body 1 as described above, it is preferable that only the upper part of the spacer 2 fits into the mesh of the mesh-like body 1; If even the lower part enters the mesh and more than half of the radial thickness of the spacer 2 protrudes upward from the mesh of the mesh 1, there is a risk that the mesh 1 will sink significantly in that part. Therefore, the spacer 2 has a spiral shape in which the half dimension of the pitch P is larger than the maximum width of the mesh of the mesh body 1 (for example, if the shape of the mesh is polygonal, the maximum line length of the diagonals) If the height of the part of the spacer 2 that protrudes upward from the mesh of the mesh 1 is less than half the radial thickness (coil outer diameter D) of the spacer 2, the floating of the mesh will be reduced. It is possible to ensure the maintenance of equipment. Alternatively, the spacer 2 has a width W of the mesh of the mesh body 1 (here, the width W refers to the maximum width of the mesh in a direction perpendicular to the helical axis of the spacer 2 in plan view. See FIG. 1). and,
2W ² ≦D ²
If the coil has a spiral shape with an outer diameter D that satisfies the following relationship, the same effect can be obtained regardless of the pitch P.

In addition, when the upper part of the spacer 2 enters the mesh (inside) of the net-like body 1 as described above, the vertical lines and horizontal lines of the mesh-like body 1 become misaligned, the mesh widens, and even the bottom of the spacer 2 extends. If it gets into the mesh, there is a risk that the net-like body 1 will sink significantly in that part. Therefore, for example, if the mesh body 1 is a wire mesh made of woven vertical lines and horizontal lines, the mesh of the mesh body 1 is configured to be difficult to widen, such as by tying a binding wire at the intersection of the vertical lines and horizontal lines. It is preferable to do so. Therefore, it is also effective to use, for example, a (non-woven) resin net obtained by continuous extrusion molding as the net-like body 1. Note that if you use a spacer 2 with a pitch P and coil outer diameter D that is large enough to prevent the upper part of the spacer 2 from penetrating too much inside the mesh of the mesh 1, it will be possible to use a general-purpose lath wire mesh or Tortoise shell wire mesh can also be used.

Further, in the prevention device of this example, since the plurality of spacers 2 are connected and extendable, it is easy to improve the workability.

In addition, in the prevention device of this example, the durability is improved by using steel wire as the wire of the spacer 2, and the corrosion and deterioration of the wire is prevented by coating the wire of the spacer 2 with resin. In addition, the elasticity of the spacer 2 can be maintained for a long period of time, and by using a material with a low coefficient of friction for the resin, the sliding resistance between the spacer 2 and the mesh body 1 is reduced, and workability is improved. .

Note that the dimensions, shapes, etc. of each of the above-mentioned members can be changed as appropriate, and the present invention is not limited to the above-described embodiments, and may be implemented with various modifications within the scope of the gist of the present invention. Of course you can get it. It goes without saying that the modifications mentioned in this specification may be combined as appropriate.

In the examples of FIGS. 1 to 3, the spacers 2 are arranged in the vertical direction (longitudinal direction) of the net-like body 1, but the arrangement method of the spacers 2 is not limited to this. They may be arranged in the direction or diagonally, or they may be arranged in a grid pattern. Further, the spacer 2 is not limited to a spiral shape, but may have another shape such as a bellows shape that expands and contracts in the direction along the protection area A.

1 Net-like body 2 Spacer 3 Bag-like body 4 Net-like body A Protected area D Coil outer diameter P Pitch

Claims (8)

A device for preventing feeding damage caused by herbivores by covering a protected area with a net-like body, characterized in that the net-like body is suspended and held using the elastic force in the radial direction of a spacer that has a spiral shape and has elasticity in the radial direction. A device to prevent damage caused by herbivorous animals. 2. The device for preventing damage caused by herbivores according to claim 1, wherein the spacer has a spiral shape with a spiral axis extending along the protected area. 3. The device for preventing damage caused by herbivores according to claim 2, wherein the spacer has a spiral shape with a pitch larger than the outer diameter of the coil. 4. The device for preventing feeding damage caused by herbivorous animals according to claim 2, wherein the spacer has a spiral shape in which a half of the pitch is larger than the maximum width of the mesh of the mesh. The spacer has a width W of the mesh of the mesh,
2W ² ≦D ²
The device for preventing feeding damage caused by herbivorous animals according to any one of claims 2 to 4, which has a spiral shape with a coil outer diameter D that satisfies the following relationship. 6. The device for preventing damage caused by herbivores according to any one of claims 1 to 5, wherein the spacer has strands made of steel wire. 7. The apparatus for preventing feeding damage by herbivorous animals according to any one of claims 1 to 6, wherein the spacer has a wire coated with resin. 8. The device for preventing feeding damage caused by herbivorous animals according to any one of claims 1 to 7, wherein the spacer is extendable by connecting other spacers to both ends thereof.

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