JP2020022489A - Small animal entry prevention structure - Google Patents

Abstract

To provide a small animal entry prevention structure capable of surely preventing entry of various kinds of small animals to a power station or substation or the like.SOLUTION: The small animal entry prevention structure comprises a fence whose outer surface is at least partially constructed from a relief planar body having a smooth surface and having fine reliefs composed of a gentle curve surface. The relief planar body is a net-like body formed of a plurality of wires having a circular cross section and a smooth surface. The net-like body has a thickness of the wire of 0.5-2.5 mm, and an aperture of the wire of 8 mm or smaller. The relief planar body is fixed to a pole of the fence and to an external side face of a crosspiece, and a fixing part of the relief planar body is covered with a substantially belt plate-shaped covering member which has no corner part of 90° or smaller on a part forming the external surface of the fence.SELECTED DRAWING: None

Description

  The present invention relates to a small animal intrusion prevention structure constructed around a power plant, a substation, or a farm or an orchard to prevent small animals from invading the area.

For example, in power plants and substations, various types of small animals such as snakes, cats, monkeys, raccoons, raccoons, cranes, weasels, mares, etc., enter the premises and come into contact with the high voltage charging unit, causing a power supply failure. This causes serious economic damage such as equipment damage and power outage.
Here, in power plants and substations, conventionally, a fence made of wire mesh fences or block walls has been installed around them. However, since these were originally installed for the purpose of preventing outsiders from entering the premises, the effect of preventing invasion of small animals was low.
For example, a snake can easily penetrate through a mesh if it is a normal wire mesh fence, and in the case of a block fence, it can also utilize a large number of protrusions and irregularities formed on the outer surface thereof. He climbed and climbed over a block wall.
In addition, small animals such as cats and monkeys can be easily climbed with their fingers on the mesh if they are relatively large mesh mesh fences that can be fingered. It was also possible to get over.
On the other hand, small animals such as raccoon dogs, weasels, raccoons, and the like have the ability to dig in the ground, and sometimes dig a hole under a wire mesh fence or the like, and sometimes enter the premises through the ground.
Furthermore, when weeds grow along the outer periphery of a wire mesh fence or block wall, a small animal such as a snake may climb up a fence or the like along a stalk or vine of a weed, resulting in overcoming.

  An object of the present invention is to solve the above-mentioned problem and to provide a small animal intrusion prevention structure capable of reliably preventing various types of small animals from invading a power station, a substation, or the like.

  The present invention has the following aspects to attain the object mentioned above.

1) An enclosure in which at least a part of the outer surface is constituted by an undulating surface having a fine undulation formed of a smooth and gentle curved surface, and the undulating surface has a height difference of the undulation. Is 0.5 to 2.5 mm, and the distance between adjacent tops is 8 mm or less.

2) The undulating planar body is a net formed from a plurality of wires having a circular cross section and having a smooth surface, and the net has a thickness of 0.5 to 2.5 mm. The small animal intrusion prevention structure according to 1) above, wherein the opening is 8 mm or less.

3) The undulating surface body is an embossed plate on which fine irregularities having a smooth and gentle curved surface are formed, and the embossed plate has a height difference of 0.5 to 2.5 mm. And the distance between adjacent projections is 8 mm or less.

4) The undulating surface body is fixed to the outer surface of the pillar and the crosspiece of the enclosure, and the fixing portion of the undulating surface body has a corner portion of 90 ° or less in a portion constituting the outer surface of the enclosure. The small animal intrusion prevention structure according to any one of 1) to 3) above, wherein the small animal intrusion prevention structure is covered with a substantially band-shaped cover member.

5) An undulating surface is adhered to one side of a rectangular frame, and the undulating surface is arranged between two pillars spaced apart from each other so as to be outside the enclosure. The small animal intrusion prevention structure according to any one of 1) to 4) above, wherein at least a part of the enclosure is constituted by the panel unit freely attached.

6) The small animal invasion described in 5) above, wherein a plurality of panel units are arranged side by side, and the lower end of a column disposed between two adjacent panel units is detachably fixed to a foundation. Prevention structure.

7) A small animal intrusion prevention bar according to any one of the above 1) to 6), wherein a plurality of upwardly projecting small animal intrusion prevention bars are provided at an upper edge of the enclosure at intervals so that small animal heads do not pass through. Construction.

8) The small animal intrusion prevention bar according to the above 7), in which a part of the length of each small animal intrusion prevention bar is constituted by an inclined portion which overhangs toward the outside of the enclosure, and the remaining portion is constituted by a vertical portion. Construction.

9) A number of small animal intrusion prevention bars are provided on a support frame provided along the upper edge of the enclosure and two small animal intrusion prevention bars arranged in parallel at a distance so that the head of the small animal does not pass through. A plurality of substantially hairpin-shaped bar structures having a connecting portion for connecting the upper ends of the two small animal intrusion prevention bars are formed by standing at intervals such that the head of the small animal does not pass. The structure for preventing invasion of small animals according to 7) or 8) above.

10) The small animal intrusion prevention structure according to any one of 7) to 9), wherein an interval between two adjacent small animal intrusion prevention bars is 40 mm or less, and a length of each small animal intrusion prevention bar is 400 mm or more.

11) On the upper edge of the enclosure, there is provided a band-shaped small animal intrusion prevention plate having a large number of upwardly projecting pricks on the upper edge capable of giving a pain stimulus to the finger of the small animal. Is composed of a first barb and a second barb having a smaller protruding height than the first barb, which are alternately arranged on the upper edge of the plate. One small animal intrusion prevention structure.
12) A band-shaped small animal intrusion prevention plate having a large number of upwardly projecting barbs on the upper edge thereof capable of giving a pain stimulus to a finger of a small animal is attached across the outer surface of the upper end of the plurality of small animal intrusion prevention bars. A plurality of spines of the small animal intrusion prevention plate are constituted by a first spine and a second spine having a smaller height than the first spine, which are alternately arranged on the upper edge of the plate. The small animal intrusion prevention structure according to any one of the above 7) to 10).

13) The small animal intrusion prevention structure according to the above 11) or 12), wherein the first and second pricks of the small animal intrusion prevention plate are alternately arranged at a pitch of 5 mm or less.

14) The upper edge of the small animal intrusion prevention plate is corrugated, and the first barb and the second barb are formed on the upper edge side by side in a corrugated manner. Small animal intrusion prevention structure.

15) A shielding member capable of preventing underground drilling and / or the occurrence of weeds by small animals is provided on the above-ground portion adjacent to the outside of the enclosure. Construction.

16) The small animal intrusion prevention structure according to the above 15), wherein the width of the shielding material is 500 mm or more.

17) On the outer surface of the middle part of the height of the electric pole standing outside the enclosure, an undulating surface having a fine undulation having a smooth and gentle curved surface is wound. The small animal intrusion prevention structure according to any one of 1) to 16) above, wherein the height difference between the undulations is 0.5 to 2.5 mm and the distance between adjacent tops is 8 mm or less.

In the small animal intrusion prevention structure of the above 1), the intrusion into the inside of the enclosure due to the climbing of the snake can be reliably prevented by the undulating surface forming the outer surface of the enclosure. That is, since there is no projection on which the snake must rely on the outer surface of the enclosure constituted by the undulating surface-like body, the snake cannot use the abdominal plate, and the body is bent in an S-shape to protrude the body. I can't support it. Furthermore, if the outer surface of the enclosure is an undulating surface, the snake cannot be used as a sucker by hollowing out the center of the belly. Therefore, it is impossible for a snake to climb over the above enclosure. In addition, small animals other than snakes, specifically, monkeys, raccoons, raccoons, mammals such as the crabsin, it is difficult to climb on the undulating plane body constituting the outer surface of the enclosure with limbs, The effect of suppressing intrusion damage can be expected.
Therefore, according to the small animal intrusion prevention structure 1), it is possible to effectively prevent small animals such as snakes and mammals from invading areas such as power plants and substations.

  According to the small animal intrusion prevention structure of the above 2), since the undulating surface forming the outer surface of the enclosure is a net-like structure, it is difficult for wind to pass between the wires to receive wind pressure. It is not necessary to strengthen the foundation for supporting the enclosure, and the installation work of the enclosure can be easily performed.

  According to the small animal intrusion prevention structure of the above 3), since the undulating surface forming the outer surface of the enclosure is an embossed plate, the material can be freely selected from metal, resin, and the like. The shape and size of the irregularities to be formed can be freely set, and manufacturing is easy. In the case of an embossed plate, it can also function as a blindfold that makes the inside of the enclosure invisible.

  According to the small animal intrusion prevention structure of 4), since the fixing portion of the undulating surface is covered with the covering member, the projection formed on the fixing portion is used to prevent the snake from climbing the enclosure. can do.

  According to the small animal intrusion prevention structure of 5), since the undulating surface is configured as a detachable panel unit, for example, it is necessary to carry out a large device or the like from the inside of the enclosure or carry it in reverse. In the event that a problem occurs, it is possible to remove the panel unit once, without using a crane or the like to get over the enclosure, and to easily carry in and out the work through the passage formed by it. When the panel unit is returned to the original state after the completion of the operation, the operation can be easily performed without any trouble and cost.

  According to the small animal intrusion prevention structure of 6) above, a plurality of panel units are installed side by side, and a column disposed between two adjacent panel units is detachable, so that devices can be carried in and out. At this time, a larger passage can be formed.

  According to the small animal intrusion prevention structure of the above 7), even if a small animal having a sharp claw, such as a cat, claws on the undulating surface of the outer surface of the enclosure and climbs it, it is provided on the upper edge of the enclosure. The small animal intrusion prevention bar cannot penetrate the inside of the enclosure because the small animal intrusion prevention bar does not catch the fingers and claws of the small animal. It is possible to reliably prevent this.

  According to the small animal intrusion prevention structure of 8), since each small animal intrusion prevention bar is provided with an overhanging inclined portion, even if a small animal such as a cat climbs to the upper edge of the enclosure, it jumps from there. As a result, the small animal intrusion prevention bar cannot be overcome, so that intrusion into the inside of the enclosure can be more reliably prevented.

  According to the small animal intrusion prevention structure of the above 9), a large number of small animal intrusion prevention bars are provided at a predetermined interval on the upper edge of the enclosure only by attaching the support frame on which the plurality of bar structures are erected to the upper edge of the enclosure. Since it can be provided, the installation work is easy, and the installation in the existing enclosure can be performed without any trouble.

  According to the small animal intrusion prevention structure of the above 10), since the distance between adjacent small animal intrusion prevention bars is 40 mm or less, it is possible to reliably prevent the invasion of cats, raccoons, raccoons, raccoons, etc. among small animals. It is. Further, since the length of each small animal intrusion prevention bar is 400 mm or more, it is possible to reliably prevent the small animal climbing up to the upper edge of the enclosure from jumping and going over the small animal intrusion prevention bar.

According to the small animal intrusion prevention structure of the above 11), the small animal intrusion prevention plate provided on the upper edge of the enclosure can reliably prevent the invasion of the inside of the enclosure due to, for example, climbing of monkeys. More specifically, when a monkey attempts to climb over an enclosure, it may jump from the ground and attempt to grab the upper edge of the enclosure. Therefore, if a small animal intrusion prevention plate is provided on the upper edge of the enclosure, the painful stimulation can be reliably applied to the fingers of the monkey by a large number of stings on the plate, and as a result, the monkey releases the hand from the enclosure. Fall outside. Here, if the distance between adjacent stabs on the small animal intrusion prevention plate is large, in a small animal such as a monkey where the function of fingers has developed, place a finger on the portion between the adjacent stabs, thereby May try to lift. In addition, in the case where pricks of the same height are provided successively, if the spacing between adjacent pricks is small, the number of pricks hitting the hand of the small animal increases, and as a result, pressure on the hand is dispersed and pain May be alleviated, and the upper edge of the plate may be grabbed and overcome. Therefore, as described above, a large number of pricks of the small animal intrusion prevention plate are configured by alternately arranging the first pricks having a large protruding height and the second pricks having a small protruding height, so that the monkey can surround the enclosure. It can be reliably prevented from getting over and entering the inside.
According to the small animal intrusion prevention structure of the above 12), the same effect as that of the small animal intrusion prevention structure of the above 7) can be obtained by the large number of small animal intrusion prevention bars provided on the upper edge of the enclosure, and a plurality of small animal intrusion prevention structures The small animal intrusion prevention plate attached across the outer surface of the upper end of the bar can reliably prevent the invasion of the inside of the enclosure by, for example, monkey climbing.

  According to the small animal intrusion prevention structure of 13), the first and second pricks of the small animal intrusion prevention plate are alternately arranged at a pitch of 5 mm or less. Since the painful stimulus is reliably received by touching the sting without entering between the adjacent stings, it is possible to prevent intrusion into the inside of the enclosure.

  According to the small animal intrusion prevention structure of the above 14), since the first and second pricks are formed alternately in a waveform on the upper edge of the small animal intrusion prevention plate, the design effect is increased, The appearance can be improved.

  According to the structure for preventing invasion of small animals according to the above 15), a shielding material capable of preventing underground drilling and / or the generation of weeds by small animals is provided on the ground portion adjacent to the outside of the enclosure. Prevents small animals such as weasels, badgers, raccoons, etc. that have excellent ability to dig in the ground to invade the inside of the enclosure, or use the stems and branches of weeds that grow along the outside of the enclosure as a foothold Can be prevented from entering the inside of the enclosure.

  According to the structure for preventing invasion of small animals according to the above 16), the width of the shielding material is 500 mm or more, so that small animals penetrate underground and invade the inside of the enclosure, or small animals pass through the stems and branches of weeds. The effect of preventing intrusion into the inside of the enclosure can be reliably obtained.

  According to the structure for preventing invasion of small animals according to the above 17), a small animal such as a snake climbs up the telephone pole and enters the inside of the enclosure by the net wound around the outer surface of the middle part of the height of the telephone pole set up outside the enclosure. Intrusion can be prevented.

It is a top view showing the whole outline of the small animal intrusion prevention structure concerning the embodiment of this invention. It is a front view which shows a part of enclosure of the small animal intrusion prevention structure. FIG. 3 is a vertical sectional view of an enclosure taken along a line III-III in FIG. 2. FIG. 4 is a horizontal sectional view of an enclosure taken along line IV-IV in FIG. 2. FIG. 5 is a vertical sectional view of an enclosure taken along line VV of FIG. 2. FIG. 6 is a horizontal sectional view of an enclosure taken along line VI-VI of FIG. 2. It is a perspective view showing the state where the net was wound around the telephone pole. It is a perspective view which shows the enclosure used for the snake invasion prevention experiment. 3A and 3B show an embossed plate used as an undulating surface-like body, where FIG. 3A is a front view, and FIG. 3B is a partially enlarged cross-sectional view taken along line BB of FIG. It is a partial front view of the enclosure provided with the small animal intrusion prevention bar. FIG. 11 is a partially enlarged vertical sectional view of an enclosure taken along line XI-XI in FIG. 10. It is a modification of a small animal intrusion prevention bar, (a) is a partial enlarged front view, and (b) is a perpendicular sectional view. It is a partial front view of the enclosure provided with the small animal intrusion prevention plate. It is a partially enlarged front view of the small animal intrusion prevention plate of FIG. It is a modification of a small animal intrusion prevention plate, and (a) is a partial enlarged front view and (b) is a vertical sectional view. It is a partial enlarged front view of the small animal intrusion prevention plate of FIG. It is a perspective view which shows the enclosure of the Example used for the invasion prevention experiment of a monkey. It is a partial perspective view showing the state where the shielding material was provided in the ground part outside the enclosure.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an overall outline of an embodiment in which the present invention is applied to a small animal intrusion prevention structure in a substation.
As shown in FIG. 1, the small animal intrusion prevention structure (1) includes an enclosure (2) installed around the entire substation or the substation area (S) in the substation. The enclosure (2) is mostly a fixed structure part (2A), but has a detachable part (2B) that can form a passage for carrying in and out equipment, and an entrance part (2C) such as a door and a gate. , Are provided at required places. The height of the enclosure (2) is usually about 2 m. Outside the enclosure (2), a utility pole (P) on which electric wires are erected is erected.

2 to 6 show a part of the enclosure (2) in detail.
FIG. 2 shows a detachable portion (2B) of the enclosure (2) and a part of a fixing structure portion (2A) adjacent to both sides thereof. The outer surface of each of the portions (2B) and (2A) of the enclosure (2) is provided with an undulating surface body (3) having a fine undulation having a smooth and gentle curved surface.

  The undulating surface body shown in FIG. 2 is a mesh body (3) formed of a plurality of wires (31) having a circular cross section and having a smooth surface. Here, the wire rod (31) having a smooth surface may be the one that has been formed by ordinary drawing, and it is not necessarily required that the wire rod (31) is specially polished or the like after forming. The wire (31) is preferably made of metal or synthetic resin. As the metal wire (31), it is preferable to use a stainless steel wire because the smoothness of the surface is not lost due to generation of rust due to long-term use. Further, as described later, it has been found through experiments that the thickness of the wire rod (31) is preferably 0.5 to 2.5 mm and the opening of the mesh body (3) is preferably 8 mm or less. The shape of the mesh of the mesh body (3) is not particularly limited, and may be, for example, a square, a rectangle, a parallelogram, a hexagon, or the like. The height of the reticulate body (3), that is, the distance over which the snake has to climb, is preferably about 3/4 of the snake's length. Snakes have the ability to stand up to about 3/4 of their length. In the case of Japan, the maximum body length of Aodaisho, the largest snake species, is about 2 m, so the height of the reticulate body (3) should be at least 1.5 m.

The fixed structure portion (2A) of the enclosure (2) includes, as structural materials, a plurality of columns (21A) erected at predetermined intervals, between upper ends of adjacent columns (21A), between lower ends, and It has a crosspiece (22) which is intercepted between heights.
The column (21A) and the crosspiece (22) are formed of, for example, a metal profile such as aluminum or stainless steel having an L-shaped cross section. As shown in FIG. 5 and FIG. 6, the support (21A) has a lower end inserted into a bottomed hole (B1) formed in the top surface of a foundation (B) made of a concrete block, and a mortar or the like is provided around the lower end. The concrete (C) is driven and fixed to the foundation (B).
The support (21A) and each crosspiece (22) are connected by bolts, nuts, welding, or the like.
Then, a net-like body (3) is attached to the outer surfaces of the support (21A) and the crosspiece (22). The reticulated body (3) is fixed to the outer surfaces of the column (21A) and the crosspiece (22) by a holding member (23).
The holding member (23) is a band-shaped member, and has a portion of the mesh body (3) sandwiched therebetween, and is provided with screws, rivets, or the like to support the outer surface of the support (21A) or the cross bar (22). Fixed to. In addition, it is preferable to use a plate head or a small head that has a small protrusion amount from the surface of the holding member (23) as a screw or a rivet used for fixing the holding member (23). Further, in this embodiment, the pressing member (23) also serves as a covering member that covers the fixing portion of the mesh body (3), and the pressing member (23) shown in FIG. Is formed at an obtuse angle so that no corner of 90 ° or less is formed in a portion constituting the outer surface of the enclosure (2). Therefore, the snake cannot climb the enclosure (2) by stretching the body between the end face of the holding plate (23) and the mesh body (3) or between the vertical and horizontal holding plates (23). . When the other corner formed by the outer surface and the left end surface of the holding member (23) is exposed on the outer surface of the enclosure (2), it is preferable that this corner also has an obtuse angle. More preferably, the corners are rounded with a radius. It is also possible to separately provide the pressing member and the covering member.
Although illustration is omitted, when a gap of about 5 mm or more is formed between the upper surface of the foundation (B) and the lower horizontal rail (22), it is preferable to fill the gap with a caulking agent.
The fixing structure portion of the enclosure (2) can be configured by attaching the mesh body (3) to the outer surface of an existing fence or block wall in addition to the above-described embodiment.

The detachable portion (2B) of the enclosure includes two left and right panel units (20). Each panel unit (20) is formed by attaching a net (3) to one side of a rectangular frame (201), and is provided between two columns (21A) (21B) that are spaced apart from each other. The mesh member (3) is disposed outside the enclosure (2), and is detachably attached to both columns (21A) (21B).
The rectangular frame body (201) includes three horizontal horizontal frame members (201a) vertically and vertically intermediate and three vertical vertical frame materials (201b) horizontally, horizontally and horizontally. Each of the frame members (201a) (201b) is formed of a metal profile such as aluminum or stainless steel having an L-shaped cross section. The horizontal frame member (201a) and the vertical frame member (201b) are connected by bolts and nuts, welding, or the like.
The mesh body (3) is fixed to the outer side surfaces of the horizontal frame member (201a) and the vertical frame member (201b) by the same pressing member (23) as the fixing structure (2A).
The lower end of the column (21B) disposed between the two panel units (20) is detachably fixed to the foundation (B). More specifically, as shown in FIG. 4, the column (21B) is a hollow member having a substantially rectangular cross section, and is formed of a metal material such as aluminum or stainless steel. At the lower end of the column (21B), a square plate-shaped mounting flange (211) is fixed by welding. The mounting flange (211) has four holes, and the anchor bolt (212) is driven into the base block (B) through these holes, so that the lower end of the support (21B) is connected to the base (B). It is detachably fixed to.
The support (21A) of the fixed structure portion is provided with a bracket (213) projecting horizontally in the upper and lower ends of the side surface adjacent to the panel unit (20) (see FIG. 6). Similarly, the column (21B) between the panel units (20) is provided with a bracket (213) extending horizontally in a fixed manner at the upper and lower ends of the left and right side surfaces by welding or the like (FIG. 4). Each bracket (213) is provided with a long hole (213a) in the left-right direction, and bolts (214) and nuts passed through the holes (213a) are used to mount the horizontal frame member (201b) of the panel unit (20). ) Are detachably fixed to brackets (213) of the columns (21A) (21B).
Similarly to the case of the fixing structure (2A), when a gap of about 5 mm or more occurs between the upper surface of the foundation (B) and the lower horizontal frame member (201a) of the panel unit (20), the same applies. Preferably, the gap is filled with a caulking agent.
When carrying large equipment into or out of the substation or its substation area (S), or carrying large equipment out of the premises, the two panel units (20) and the columns (21B) between them By removing it, a large frontage passage is formed in the enclosure (2), so that large equipment and the like can be smoothly carried in and out through the passage. Further, after the loading / unloading operation is completed, if the two panel units (20) and the columns (21B) are attached again, the original closed state can be easily restored.

  FIG. 7 shows an example in which the small animal intrusion prevention structure according to the present invention is applied to prevent a snake from climbing a telephone pole. As shown in the figure, the above-mentioned net-like body (3) is wound around and fixed to the outer surface of the telephone pole (P) at the height. Snakes try to climb the utility pole (P) due to their habits or to eat chicks in bird nests built on top of the utility pole (P). Therefore, if the mesh (3) is provided in the middle of the height of the utility pole (P), the snake cannot climb as in the case of the enclosure (2) having the mesh (3). Fall. As a result, it is possible to effectively prevent the occurrence of a short circuit accident due to the snake coming into contact with the electric device or the transmission and distribution line at the top of the utility pole (P).

Next, with reference to FIG. 8, an experimental example of the effect of preventing the climbing of the snake by the net-like body will be described.
Several kinds of plain weave nets (3) having a circular cross-sectional surface made of a smooth stainless steel wire and having a square mesh were prepared by changing the thickness and aperture of the wire. Then, as shown in FIG. 8, an enclosure (2X) having a width, depth, and height of 1.5 m, respectively, using each type of reticulated body (3) so that the wire is oriented in the horizontal and vertical directions. Was formed. The enclosure (2X) is composed of a plurality of struts (21X) standing on the center of a square and one side of a square as viewed from a plane, and a crosspiece (22X) arranged at the center of the height of the strut (21X). A mesh body (3) is stretched inside a skeleton consisting of: a mesh body (3), which is a vertical and horizontal holding plate attached to the inside of the column (21X) and the crosspiece (22X) with flathead screws. (23X). Both end surfaces of the holding plate (23) are inclined surfaces extending toward the mesh body (3). In this enclosure (2X), 50 snakes (adult snakes) were placed, and the number of snakes that escaped from the enclosure (2X) in 5 days was counted. The results are summarized in Table 1. In addition, the test was not performed for the mesh in the (-) column in Table 1 because it is out of the standard.

  As is clear from Table 1, the use of the net (3) having a wire having a thickness of 0.5 to 2.5 mm and an opening of 8 mm or less can effectively suppress snake climbing. I found it.

FIG. 9 shows a modified example of the undulating planar body provided on the outer surface of the enclosure. The undulating surface body shown in FIG. 9 is an embossed plate (3X) in which fine irregularities having smooth and gentle curved surfaces are formed.
The embossed plate (3X) preferably has a height difference of 0.5 to 2.5 mm and a distance between adjacent protrusions of 8 mm or less. If such an embossed plate (3X) is used for the outer surface of the enclosure, it is possible to effectively prevent the snake from climbing, as in the case of the mesh member (3) described above.
The embossed plate (3X) is formed by embossing (embossing) a metal plate, resin plate, etc., and the shape and depth of the irregularities can be set freely, so those that satisfy the above conditions Is easy to manufacture.
It is also possible to apply a punched plate shape by extracting a concave portion of the embossed plate (3X).
When the embossed plate (3X) is used as the undulating surface, in addition to the effect of preventing the snake from climbing, the blindfold effect of making the inside of the enclosure invisible is obtained. However, since the wind pressure load increases, it is considered appropriate to use it for a relatively small area such as a door (2C).

FIG. 10 and FIG. 11 show a second embodiment of the small animal intrusion prevention structure according to the present invention. The illustrated enclosure (2D) is provided with a large number of upwardly projecting small animal intrusion prevention bars (41) at the upper edge thereof in addition to a net (3) constituting an outer surface. The distance between the small animal intrusion prevention bars (41) is such that small animals such as cats cannot pass through their heads.
In this embodiment, a number of small animal intrusion prevention bars (41) are arranged in parallel with a support frame (5) provided along the upper edge of the enclosure (2D) at an interval such that the head of the small animal does not pass. A plurality of substantially hairpin-shaped bar structures (e.g., having two small animal intrusion prevention bars (41) and a connecting portion (42) connecting the upper ends of the two small animal intrusion prevention bars (41) to each other ( 40) is formed by erected at an interval so that the head of a small animal does not pass.
The support frame (5) is, for example, a hollow member having a substantially rectangular cross section and is formed of a metal shape material such as aluminum or stainless steel, and the cross beam (21) forming the upper edge of the enclosure (2D). Is fixed to the upper surface by bolts and nuts, welding, or the like.
The bar structure (40) is formed by bending a metal bar such as aluminum or stainless steel. The thickness of the metal bar is preferably 5 mm or more in order to secure strength. The connecting portion (42) may be formed in an inverted V shape as shown in the drawing, or may be formed in an inverted U shape.
The lower ends of the two small animal intrusion prevention bars (41) of the bar structure (40) penetrate through the upper wall of the support frame (5) and are fixed by welding or a screw mechanism or the like.
As shown in FIG. 11, each small animal intrusion prevention bar (41) is constituted by an inclined portion (411) in which the middle part of the length is overhanging toward the outside of the enclosure (2D), and the remaining upper and lower parts are formed. It is constituted by a vertical portion (412). The inclination angle (Y) of the inclined portion (411) with respect to the vertical plane is about 10 to 90 °. With such an inclined portion (411), even if a small animal such as a cat climbs to the upper edge of the enclosure (2D), it cannot jump from there and get over the small animal intrusion prevention bar (41).
The distance between two adjacent small animal intrusion prevention bars (41) is set to 40 mm or less. Thereby, invasion of cats, raccoons, raccoons, hakubinsin and the like among small animals is surely prevented. However, in order to prevent the invasion of weasels and martens, which are smaller than the above-mentioned small animals, it is preferable that the interval between the small animal intrusion prevention bars (41) is about 25 to 30 mm. The length of each small animal intrusion prevention bar (41) is 400 mm or more. Therefore, even if a small animal such as a cat climbs to the upper edge of the mesh (3) of the enclosure (2D) and jumps there, it does not reach the connecting portion (42) at the upper end of the bar structure (40), and the enclosure ( You cannot get over 2D).
In the above embodiment, the small animal intrusion prevention bar (41) is provided at the upper edge of the enclosure (2D) having the mesh body (3) .However, for example, it is not necessary to consider snake invasion. For example, a small animal intrusion prevention bar (41) can be provided on an enclosure having no net-like body (3), for example, on the upper edge of a general fence or block wall to prevent cats or the like from invading.

FIG. 12 shows a modification of the small animal intrusion prevention bar. The small animal intrusion prevention bars (41X) shown in the figure are independent of each other, not two pairs, and each bar is independently protruded upwards at an interval such that the head of the small animal does not pass through the support frame (5). It is fixed to.
These small animal intrusion prevention bars (41X) also have an upper vertical portion (412), an intermediate height overhanging slope (411), and a lower vertical portion (412), but with a vertical upper portion (412). The sections (412) are connected by a horizontal crosspiece (43). Therefore, even if a cat or the like forcibly plunges his head between the small animal intrusion prevention bars (41X), the interval between the small animal intrusion prevention bars (41X) cannot be widened. The crosspiece (43) is preferably mounted at a height of at least 400 mm from the support frame (5). In this case, the small animal cannot step on the horizontal rail (43) and cannot invade the small animal intrusion prevention bar (41X).

FIG. 13 and FIG. 14 show a third embodiment of the small animal intrusion prevention structure according to the present invention. The illustrated enclosure (2E) is provided with a band-shaped small animal intrusion prevention plate (6) on the upper edge thereof in addition to a mesh body (3) constituting an outer surface.
The small animal intrusion prevention plate (6) has, on its upper edge, a large number of upwardly projecting stings that can provide painful stimulation to the fingers of the small animal. These thorns are composed of a first thorn (61) and a first thorn (61) alternately arranged on the upper edge of the small animal intrusion prevention plate (6) along the length of the plate (6). Is also constituted by a second barb (62) having a small protruding height. The distance (S1) between the adjacent first barb (61) and the second barb (62) is 5 mm or less. The tips of the first barbs (61) and the tips of the second barbs (62) are respectively aligned on the same horizontal line.
The small animal intrusion prevention plate (6) is manufactured, for example, by cutting and forming a large number of spines (61) and (62) on one edge of a metal strip such as stainless steel by laser processing or the like. be able to.
The mounting structure of the small animal intrusion prevention plate (6) on the upper edge of the enclosure (2E) is not particularly limited.For example, the lower edge of the plate (6) may be What is necessary is just to attach to a holding plate (23) fixed to the horizontal rail by welding, bolts and nuts, rivets, or the like.
In the above configuration, when the monkey tries to climb over the enclosure (2E), the monkey stretches or jumps up and tries to grasp the upper end of the enclosure (2E). ) Are provided alternately with the first and second relatively low first spines (61) and (62). As a result, release your hand and fall outside the enclosure (2E).

15 and 16 show a fourth embodiment of the small animal intrusion prevention structure according to the present invention. As shown in FIG. 15, the enclosure (2F) of this embodiment is provided at its upper edge with a number of small animal intrusion prevention bars (41X) identical to those shown in FIG. The small animal intrusion prevention plate (6X) is attached to the outer surface of the upper end portion of 41X).
The small animal intrusion prevention plate (6X) has an upper edge that is corrugated, and a relatively high first pin (61) and a relatively low second pin (62) are alternately corrugated on the upper edge. They are formed side by side. Thereby, the design effect of the small animal intrusion prevention plate (6X) is increased, and the appearance is improved. The distance (S1) between the adjacent first barb (61) and the second barb (62) is 5 mm or less.
According to the enclosure (2F) of this embodiment, it is possible to reliably prevent invasion not only of small animals having claws such as cats but also monkeys.

Next, an experiment on the effect of preventing invasion of monkeys performed using the small animal intrusion prevention structure according to the present invention will be described.
First, as an example, an enclosure (2Y) as shown in FIG. 17 was installed in a wild monkey park where many Japanese monkeys live. The enclosure (2Y) is composed of a plurality of columns (21Y) standing at four corner positions of a square and two intermediate positions that divide one side of the square into three parts when viewed from a plane, and the upper ends of adjacent columns (21Y). A frame (20Y) composed of a plurality of crosspieces (22Y) connecting two height intermediate positions that divide the length of the support, the lower end, and the support (21Y) into three equal parts, and a frame (20Y) ) And a small animal intrusion prevention plate (6X) provided on the upper edge of the four sides of the skeleton. As the small animal intrusion prevention plate (6X), a plate having the same structure as the plate shown in FIGS. 15 and 16 was used.
Then, the bait preferred by the monkeys was sprayed inside the enclosure (2Y). In addition, by preparing a 0.5 m high platform and a 1 m platform that monkeys can easily climb, either by installing any of these platforms outside the enclosure (2Y) or not, Change the height from the ground or the platform to the upper edge of the frame (20Y) in three stages: 1.5m (without platform), 1m (with 0.5m platform), 0.5m (with 1m platform), The presence of monkeys entering the enclosure (2Y) was observed.
In addition, as a comparative example, the presence or absence of intrusion of monkeys into the enclosure was observed in the same manner as in the above example except that the small animal intrusion prevention plate was not provided on the upper edge of the framework.
The results are summarized in Table 2.

  As is evident from Table 2, in the embodiment in which the small animal intrusion prevention plate was installed on the upper edge of the enclosure, the invasion of monkeys could be prevented. It can be said that it is preferable to provide a mesh (3Y) of at least about 1 m.

FIG. 18 shows a fifth embodiment of the small animal intrusion prevention structure according to the present invention. The small animal intrusion prevention structure shown in the same figure has a ground part (G1) adjacent to the outside of the enclosure (2E) provided with the reticulated body (3) and the small animal intrusion prevention plate (6). A shielding material (7) capable of preventing the generation of weeds is provided. The width of the shielding member (7) is 500 mm or more.
For example, as a shielding material (7) suitable for preventing small animals such as raccoon dogs, weasels, badgers, and raccoons from digging in the ground and invading the inside of the enclosure, a wire mesh such as a stainless steel mesh, or a stainless steel plate And a metal plate such as that laid on the above-ground portion (G1), or a mortar or concrete cast onto the above-ground portion (G1). In the case of a wire mesh, it can be used in combination with a grass sheet or grass sand, thereby suppressing the occurrence of weeds. If there is no room to install the shielding material (7) in the above-ground part (G1) between the enclosure (2E) and the site boundary line, the shielding material (7) should be installed vertically or inclined in the ground. It may be buried.
Examples of the shielding material (7) for preventing weeds from growing along the outer periphery of the enclosure (2E) include mortar, concrete, metal plate, weed prevention sheet, weed prevention sand and the like. This can prevent small animals from entering the inside of the enclosure (2E) using the stems and branches of the weeds as a foothold.

  INDUSTRIAL APPLICABILITY The present invention is suitably used as a small animal intrusion prevention structure for preventing various types of small animals, such as snakes, cats, monkeys, raccoons, raccoons, raccoons, weasels, martens, etc. from invading in power stations and substations. can do.

(1): Small animal intrusion prevention structure
(2) (2D) (2E) (2F): Enclosure
(2A): Fixed structure (enclosure)
(2B): Detachable part (of enclosure)
(20): Panel unit
(201): Square frame
(21A): Support
(21B): Support
(22): Crossbar
(23): Holding member (covering member)
(3): Net (undulating surface)
(31): Wire rod
(3X): Embossed plate (undulating surface)
(40): Bar structure
(41) (41X): Small animal intrusion prevention bar
(42): Connecting part
(411): Inclined part
(412): Vertical part
(5): Support frame
(6) (6X): Small animal intrusion prevention plate
(61): The first sting
(62): Second spine
(7): shielding material
(B): Basic
(P): Utility pole

Claims (17)

  An outer surface is provided with at least a part of an outer surface constituted by an undulating surface having fine undulations having a smooth and gentle curved surface, and the undulating surface has a height difference of 0%. A small animal intrusion prevention structure having a distance of 0.5 to 2.5 mm and a distance between adjacent tops of 8 mm or less.   The undulating planar body is a net formed from a plurality of wires having a circular cross section and having a smooth surface, and the net has a thickness of 0.5 to 2.5 mm. The small animal intrusion prevention structure according to claim 1, wherein the opening is 8 mm or less.   The undulating planar body is an embossed plate on which fine irregularities having a smooth and gentle curved surface are formed, and the embossed plate has a height difference of 0.5 to 2.5 mm. 2. The small animal intrusion prevention structure according to claim 1, wherein a distance between adjacent convex portions is 8 mm or less. 3.   The undulating surface body is fixed to the outer surface of the column and the crosspiece of the enclosure, and the fixing portion of the undulating surface body does not have a corner portion of 90 ° or less in a portion constituting the outer surface of the enclosure. The small animal intrusion prevention structure according to any one of claims 1 to 3, which is covered with a band-shaped covering member.   An undulating surface is attached to one side of a rectangular frame, and the undulating surface is arranged between two columns arranged at an interval so as to be outside the enclosure. The small animal intrusion prevention structure according to any one of claims 1 to 4, wherein at least a part of the enclosure is constituted by the attached panel unit.   6. The small animal intrusion prevention device according to claim 5, wherein a plurality of panel units are arranged side by side, and a lower end portion of a column disposed between two adjacent panel units is detachably fixed to a foundation. Construction.   The small animal intrusion prevention device according to any one of claims 1 to 6, wherein a plurality of upwardly projecting small animal intrusion prevention bars are provided at an upper edge of the enclosure at intervals so that the small animal head does not pass therethrough. Construction.   The small animal intrusion prevention structure according to claim 7, wherein each small animal intrusion prevention bar has a part of its length formed by an inclined portion that is overhanging toward the outside of the enclosure, and the remaining portion is formed by a vertical portion. .   A number of small animal intrusion prevention bars are provided on a support frame provided along the upper edge of the enclosure, and two parallel small animal intrusion prevention bars and two small animal intrusion prevention bars are arranged so that small animal heads do not pass through. A plurality of substantially hairpin-shaped bar components having a connecting portion connecting the upper ends of the intrusion prevention bars are formed by standing at intervals such that the head of the small animal does not pass through; The small animal intrusion prevention structure according to claim 7 or 8.   The small animal intrusion prevention structure according to any one of claims 7 to 9, wherein an interval between two adjacent small animal intrusion prevention bars is 40 mm or less, and a length of each small animal intrusion prevention bar is 400 mm or more.   At the upper edge of the enclosure, there is provided a strip-shaped small animal intrusion prevention plate having a large number of upwardly projecting pricks at the upper edge capable of giving painful stimulation to the fingers of the small animal. Is formed by a first barb and a second barb having a smaller protruding height than the first barb, which are alternately arranged on the upper edge of the same plate. 3. The small animal intrusion prevention structure according to 1.   A belt-shaped small animal intrusion prevention plate having a large number of upwardly projecting barbs on the upper edge capable of giving a pain stimulus to a finger of a small animal is attached across the outer surface of the upper end of the plurality of small animal intrusion prevention bars. The plurality of spines of the small animal intrusion prevention plate are constituted by a first spine and a second spine having a smaller height than the first spine, which are alternately arranged on the upper edge of the plate. Item 11. The small animal intrusion prevention structure according to any one of Items 7 to 10.   The small animal intrusion prevention structure according to claim 11 or 12, wherein the first and second pricks of the small animal intrusion prevention plate are alternately arranged at a pitch of 5 mm or less.   The upper edge of the small animal intrusion prevention plate is corrugated, and the first barb and the second barb are formed on the upper edge side by side in a corrugated manner, according to any one of claims 11 to 13. Small animal intrusion prevention structure.   The small animal intrusion prevention device according to any one of claims 1 to 14, wherein a shielding member capable of preventing underground drilling and / or the occurrence of weeds by the small animal is provided in the above-ground portion adjacent to the outside of the enclosure. Construction.   The small animal intrusion prevention structure according to claim 15, wherein the width of the shielding material is 500 mm or more.   On the outer surface of the middle part of the height of the telephone pole set up outside the enclosure, an undulating surface having a fine undulation consisting of a smooth and gently curved surface is wound, and the undulating surface is The small animal intrusion prevention structure according to any one of claims 1 to 16, wherein a height difference between the undulations is 0.5 to 2.5 mm, and a distance between adjacent tops is 8 mm or less.

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