Pig intrusion prevention system

Abstract

To provide a wild boar intrusion prevention system that can effectively prevent wild boars from entering a protected area and that can be constructed at lower cost than before.SOLUTION: A system includes an electric fence (12) provided with a passageway (14) for passing an inside / outside passage road (ND) and an electric shock device (16) installed in the passage (14). The electric shock device 16 is composed of a wire installation device 24 that stretches bare wires 22 so as to cross the passageway 14 in a width direction, and a high voltage generator 26 that applies a high voltage to the bare wires 22. The wire installation device 24, under normal circumstances, supports and fixes both ends of the bare wire 22 so that the bare wire is suspended at a height of 30 to 200 mm from the ground. When an external force is applied to the bare wire 22, the tension of the bare wire 22 is relaxed so that the tension of the bare wire 22 does not exceed a predetermined value, thereby preventing a break of the bare wire 22. After that, when the external force disappears, an operation to return to the normal state is performed.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] This invention relates to a pig intrusion prevention system for preventing the intrusion of pigs that damage crops.

Background Art

[0002] Conventionally, as disclosed in Patent Document 1 by the applicant of the present application, there has been a pest intrusion prevention system that protects a specific area or settlement including a plurality of fields by surrounding it with an electric fence. This pest intrusion prevention system is a system targeting pests such as pigs and deer. It has a passage opening for passing an internal and external access road in the middle of the electric fence, and a gate device is installed at the passage opening. When a pedestrian, automobile, etc. passes through the passage opening, the gate device automatically opens and closes the passage opening.

[0003] The gate device has an opening and closing member that blocks the passage of pests and humans in the closed state, an electric shock means that gives an electric shock to a pest that comes into contact with the opening and closing member, a drive mechanism that drives the opening and closing member to open and close, and a passerby detection device that detects pests and humans, and performs an operation of automatically switching the state of the opening and closing member based on the detection result of the passerby detection device.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Since the pig intrusion prevention system of Patent Document 1 targets a plurality of pests such as pigs and deer, a large-scale gate device is inevitably required, resulting in a relatively expensive configuration.

[0006] The inventor thought that if the target was narrowed down to wild boars, a more inexpensive configuration could be achieved by taking advantage of the habits of wild boars. Also, when asking people in areas troubled by the damage of harmful animals, it was often heard that the main harmful animal causing problems was wild boars, and that there would be sufficient benefits if the intrusion of wild boars could be prevented.

[0007] This invention has been made in view of the above background art, and an object thereof is to provide a wild boar intrusion prevention system that can effectively prevent wild boars from entering a protected area and can be configured at a lower cost than before.

Means for Solving the Problems

[0008] This invention partitions a wild boar habitat area and a protected area, and includes an electric fence that blocks wild boars in the wild boar habitat area from entering the protected area, a passage opening provided by opening the middle of the electric fence to allow passage through an internal and external access road connecting the inside and outside of the protected area, and an electric shock device installed at the passage opening. The electric shock device is composed of an electric wire erection device that stretches a bare wire across the passage opening in the width direction, and a high voltage generator that applies a high voltage to the bare wire. The electric wire erection device usually supports and fixes both ends of the bare wire so that the bare wire is spanned at a height separated from the ground. When an external force is applied to the bare wire, the tension of the bare wire is relaxed so that the tension of the bare wire does not exceed a certain value to prevent the bare wire from breaking, and when the external force disappears, it performs an operation to return to the normal state. It is a wild boar intrusion prevention system. 30 to 100 mm When an external force is applied to the bare wire, the tension of the bare wire is relaxed so that the tension of the bare wire does not exceed a certain value to prevent the bare wire from breaking, and when the external force disappears, it performs an operation to return to the normal state. It is a wild boar intrusion prevention system. Furthermore, it is preferable that an insulating material for maintaining the separation distance between the bare wire and the ground at a predetermined value is provided in the middle of the bare wire.

Effects of the Invention

[0009] The wild boar intrusion prevention system of this invention is a large-scale system that surrounds and protects a specific area or settlement including multiple farmlands, etc. with one electric fence. Can be easily formedTherefore, the total cost can be significantly reduced compared to individual residents installing small-scale systems separately. In addition, there is a passage provided in the middle of the electric fence for the internal and external access roads to pass through, and a unique electric shock device that utilizes the habits of pigs is installed at the passage, so it is possible to effectively prevent pigs from entering the protected area from the passage, and pedestrians and automobiles can pass through the passage without any problem. Easily In addition, since the electric shock device has a simple structure, it can be installed very inexpensively.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Modes for Carrying Out the Invention

[0011] Hereinafter, an embodiment of the pig intrusion prevention system of this invention will be described with reference to the drawings. The pig intrusion prevention system 10 of this embodiment is a system installed to protect a settlement or the like in the mountains from pigs. For example, the settlement shown in FIG. 1 is located inside and surrounded by a pig inhabiting area IA where pigs inhabit, and almost the entire area of the settlement including a plurality of farmlands T, houses J, and living roads SD becomes a protected area HA. In addition, an internal and external access road ND that crosses the inside and outside of the protected area HA passes through this settlement. The internal and external access road ND is a road that leads to other adjacent settlements, and pedestrians, bicycles, automobiles (two-wheeled, four-wheeled), etc. pass through.

[0012] The pig intrusion prevention system 10 includes an electric fence 12 that demarcates a pig habitat area IA and a protected area HA and prevents pigs from entering the protected area HA. And, in order to allow passage through the internal and external access roads ND, as shown in FIG. 2, two locations in the middle of the electric fence 12 are opened to provide access gates 14, and unique electric shock devices 16 are installed at each access gate 14.

[0013] The electric fence 12 is a general electric fence for pigs and the like, and two bare wires 12a are installed on a number of columns. And, based on the electrical energy generated by the solar power generation device 20a, the high voltage generator 20 generates a high voltage and applies it to the two bare wires 18. When there are two bare wires 18, for example, they are installed at heights of about 20 cm and about 40 cm. At this height, pigs cannot jump over or pass through, and moreover, an electric shock can be accurately applied when a pig comes into contact. The number of bare wires 18 may be increased to three or more.

[0014] The electric shock device 16 is an electric shock device for pigs and is composed of a wire erection device 24 that stretches a bare wire 22 across the width direction of the access gate 14 and a high voltage generator 26 that applies a high voltage to the bare wire 22. Note that the high voltage generator 26 can be used in common with the high voltage generator 20 for the above-mentioned electric fence 12.

[0015] The wire erection device 24, in normal times, supports and fixes both ends of each bare wire 22 so that a plurality of bare wires 22 are at a position separated from the ground and are spanned at a height of 30 to 200 mm, preferably a low position of 100 mm or less. And, when an external force is applied to the bare wire 22, so that the tension of the bare wire 22 does not exceed a certain value, the bare wire 22 is elastically displaced or one end or both ends of the bare wire 22 are elastically displaced to loosen the fixation, and the tension of the bare wire 22 is relaxed to prevent disconnection. Then, when the external force disappears, an operation is performed to return to the normal state. As a specific example of the structure of the wire erection device 24, a structure in which one end or both ends of the bare wire 22 are supported via a spring member having a predetermined elastic modulus can be considered.

[0016] When pigs walk, they always have the habit of keeping their noses low and searching for food. The same is true when they are looking for the entrance (passage 14) to the protected area HA. Therefore, when a pig tries to pass through passage 14, the sensitive nose tip of the pig will almost surely come into contact with the bare wire 22 stretched at a low position 30 - 200 mm above the ground, and can effectively give an electric shock to the pig, and can surely drive it back in the direction of the pig habitation area IA. The same applies when the bare wire 22 is stretched at a position of 30 to 100 mm.

[0017] Also, since pigs are timid and intelligent animals, once they receive an electric shock, they tend not to approach the place where they received the electric shock thereafter. Therefore, for example, at the initial stage of operating the electric shock device 16 and the electric fence 12, it is advisable to scatter food near the electric shock device 16 and the electric fence 12 to deliberately attract the pigs and let them experience an electric shock. By doing this, they can be trained not to approach the passage 14 where the electric shock device 16 is installed or the electric fence 12.

[0018] When pedestrians, bicycles, and motor vehicles (two - wheeled and four - wheeled) pass through passage 14, they will step on the bare wire 22 with their shoes or tires. When the bare wire 22 is stepped on, the tension of the bare wire 22 exceeds a certain value, and the wire erection device 24 loosens the fixation of the bare wire 22, so the disconnection of the bare wire 22 is prevented. And when pedestrians, etc. pass through and the tension of the bare wire 22 drops, it automatically returns to the normal state.

[0019] In addition, when the bare wire 22 stepped on by shoes or tires touches the ground, a wasteful current may flow towards the ground, and there is a risk that the voltage of the high - voltage generator 26 will drop. Therefore, when the wire erection device 24 loosens the fixation of the bare wire 22, it is preferable to configure the high - voltage generator 26 to stop outputting.

[0020] The reason for stretching the bare wire 22 of the electric shock device 16 at a height of 30 mm or more above the ground is, besides the habit of pigs, to consider, for example, preventing it from touching the ground when the bare wire 22 sways under strong wind. Also, stretching it at a height of 200 mm or less is to enable bicycles and motor vehicles with small tires to also cross over the bare wire 22. For this reason 。

[0021] As described above, since the pig intrusion prevention system 10 is a large-scale system that surrounds and protects a specific area or settlement including a plurality of farmlands with a single electric fence 12, the total cost can be significantly reduced compared to individual residents installing small-scale systems individually. In addition, although a passage 14 for passing the internal and external access road ND is provided in the middle of the electric fence 12, a unique electric shock device 16 that utilizes the habits of pigs is installed at the passage 14, so that pigs can be effectively prevented from entering the protected area HA from the passage 14, and pedestrians and automobiles can pass through the passage 14 without any problems. Further, since the electric shock device 16 has a simple configuration, it can be installed very inexpensively.

[0022] Note that the pig intrusion prevention system of the present invention is not limited to the above-described embodiment. For example, although the electric shock device 16 shown in FIG. 2 has four bare wires 22, the number of bare wires may be any number as long as it is one or more. In addition, the structure of the wire erection device of the electric shock device is not particularly limited, and can be freely selected from known structures.

[0023] In addition, roads such as the internal and external access road ND are generally provided with a gradient so that the central part in the width direction is higher in order to drain rainwater. In such a case, as shown in FIG. 3(a), it is preferable to attach an insulating tube material 28 at an appropriate position (one or a plurality of positions) in the length direction of the bare wire 22. The insulating tube material 28 is a hollow rubber or resin cylindrical body having a certain flexibility and shape recovery property, and as shown in FIG. 3(b), the bare wire 22 is inserted into through holes 28a provided at two appropriate positions above the ground side with respect to the axis center. The insulating tube material 28 supports the bare wire 22 in a state where the lower surface side is in contact with the ground, and maintains the separation distance between the bare wire 22 and the ground at a predetermined value. Therefore, even when the ground is not flat, it becomes easy to maintain the separation distance between the bare wire 22 and the ground at a predetermined interval. Further, when the bare wire 22 is stepped on by shoes or tires, since the insulating tube material 28 is easily crushed, the return operation of the bare wire 22 is appropriately performed as in the case where the insulating tube material 28 is not attached.

[0024] In the pig intrusion prevention system 10, the high-voltage generator 26 for the electric shock device 16 is also used as the high-voltage generator 20 for the electric fence 12 to reduce costs. However, when there are circumstances such as wanting to individually adjust the electric shocks of the electric shock device 16 and the electric fence 12, it is preferable to provide separate high-voltage generators.

[0025] In addition, the structure of the electric fence is not particularly limited. Besides the structure in which a plurality of bare wires are installed on the support columns like the electric fence 12, for example, a structure with a wire mesh stretched around may also be used. Also, as a means of electrically insulating the bare wire from the ground, besides leaving a space, an insulator may be interposed between the ground partially. The protected area has no limitation in terms of size or shape as long as it can be demarcated by an electric fence. Therefore, the pig intrusion prevention system of the present invention can be installed not only in mountain villages but also in various places and regions.

Explanation of reference numerals

[0026] 10 Pig intrusion prevention system 12 Electric fence 14 Passage 16 Electric shock device 18, 22 Bare wire 20, 26 High-voltage generator 24 Wire erection device HA Protected area IA Pig habitation area ND Internal and external access road

Claims

1. An electric fence that demarcates a pig breeding area and a protected area and prevents pigs in the pig breeding area from entering the protected area, a passage opening provided by opening the middle of the electric fence to allow passage through an internal and external access road connecting the inside and outside of the protected area, and an electric shock device installed at the passage opening. The electric shock device is composed of a wire erection device that stretches a bare wire across the passage opening in the width direction and a high-voltage generator that applies a high voltage to the bare wire. The wire erection device normally supports and fixes both ends of the bare wire so that the bare wire is spanned at a height of 30 to 100 mm above the ground, and when an external force is applied to the bare wire, it relaxes the tension of the bare wire so that the tension of the bare wire does not exceed a certain value to prevent the bare wire from breaking, and when the external force disappears, it performs an operation to return to the normal state. A pig intrusion prevention system characterized by this.

2. The pig intrusion prevention system according to Claim 1, wherein an insulating material for maintaining a predetermined distance between the bare wire and the ground is provided in the middle of the bare wire.

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