snare

Abstract

To provide a snare trap that can reliably capture the target pest animal while preventing the accidental capture of bears that are not designated as pest animals. [Solution] The snare trap 1 comprises an inner cylindrical body 11 formed by a tapered portion 21 and a cylindrical portion 22 extending downward from the periphery of the opening, and an outer cylindrical body 12 having a plurality of retaining claw portions 40 formed at predetermined intervals on the upper outer peripheral edge to hold a trap loop 71 which is biased by a spring 73 and constitutes a wire member for tying the legs of the animal to be captured. A wire release portion 50 having at least a pedal 51 is positioned on the lower end side of the inner cylindrical body 11, and the retention of the trap loop 71 by the retaining claw portions 40 is released in conjunction with the load on the pedal 51.

Description

Technical Field

[0001] The present invention relates to a noose trap.

Background Art

[0002] For example, as an instrument used for capturing vermin, a noose trap disclosed in Patent Document 1 below is known. This noose trap includes a pedal body, a pair of belt plates, an installation frame, and a noose wire having a noose ring portion that can be tightened formed at one end side. In this noose trap, when the foot of a vermin steps on the pedal body, the pedal body descends and contacts the bottom surface of the installation frame. At this time, each belt plate rotates, the noose ring portion of the noose wire attached to each belt plate comes off, and the noose ring portion shrinks due to the elastic force of the coil spring member attached to the noose wire to trap the foot of the vermin. Thereby, it is possible to capture vermin.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the conventional snare traps described above have the following problems that need to be addressed. Specifically, conventional snare traps can mistakenly capture not only animals designated as pests, such as wild boars and Japanese deer, but also bears, which are not designated as pests but are protected animals or require special permits to be captured. In such cases, in some areas, regulations require that when a bear is mistakenly captured, it be injected with anesthesia, released from the snare trap, and then released back into the forest after it has recovered. As a result, in such areas, the mistaken capture of a bear incurs significant costs and makes it difficult to ensure the safety of the trappers. As a countermeasure, one method is to construct the snare trap using low-strength materials that can be destroyed by the strength of a mistakenly captured bear, but this presents the problem that capturing the target pest animal itself becomes difficult.

[0005] Therefore, the object of the present invention has been made in view of these problems, and is to provide a snare trap that can reliably capture the target pest animals while reliably preventing the accidental capture of bears that are not designated as pest animals. [Means for solving the problem]

[0006] To solve the above problems, one aspect of the snare trap according to the present invention comprises an inner cylindrical body 11 formed by a tapered portion 21 and a cylindrical portion 22 connected to the tapered portion 21 extending downward from the periphery of the opening, and an outer cylindrical body 12 having a plurality of retaining claw portions 40 formed at predetermined intervals on the upper outer peripheral edge for holding a trap loop 71 which is biased by a spring 73 and constitutes a wire member for tying the legs of an animal to be captured, and a wire release portion 50 having at least a pedal 51 is arranged on the lower end side of the inner cylindrical body 11, and the retention of the trap loop 71 by the retaining claw portion 40 is released in conjunction with the load on the pedal 51.

[0007] Another aspect of the snare trap according to the present invention is that when a downward force is applied to the pedal, it rotates around a pivot point, causing a hook formed at one end of the pedal lever to move inward, and the wire detaches from the retaining claw portion 40 and is tied to the leg of the animal to be captured.

[0008] Another aspect of the snare trap according to the present invention is that a cover member 14 is placed over the upper surface of the inner cylindrical body 11, with an insertion hole 16 formed in the center and radial cutouts 18 formed around the insertion hole 16.

[0009] Furthermore, another aspect of the snare trap according to the present invention is that a wire detachment prevention member 80 is provided, which is composed of a convex plate-shaped member 84 consisting of a protrusion 82 and a base 83 in a plan view, and a vertical plate-shaped member 85 extending vertically from the base 83. A substantially rectangular receiving member 90 is placed on a part of the upper edge surface of the tapered portion 21, and in a state in which the trap loop is held by the retaining claw portion, the convex plate-shaped member 84 of the wire detachment prevention member 80 is inserted between the upper edge surface of the tapered portion 21 and the receiving member 90. [Effects of the Invention]

[0010] The snare trap of the present invention can reliably capture the target pest animal while preventing the accidental capture of bears that are not designated as pest animals. [Brief explanation of the drawing]

[0011] [Figure 1] This is an exploded perspective view illustrating the structure of the snare trap according to Embodiment 1. [Figure 2] This diagram shows the state in which the wire is held by the wire-holding claw. [Figure 3] This diagram shows the state in which the spring of the wire component has been detached. [Modes for carrying out the invention]

[0012] <Embodiment 1> Hereinafter, Embodiment 1 of the snare trap according to the present invention will be described with reference to the drawings. Note that the embodiments shown below are examples of the present invention, and the present invention is not limited to these embodiments; various configurations can be adopted.

[0013] Here, Figure 1 is an overall perspective view of the snare trap according to the present invention.

[0014] The snare trap 1 is a trap for capturing pests, and as shown in Figure 1, it is composed of a cylindrical member 10, a wire member 70, and a cover member 14. [Cylindrical member 10] The cylindrical member 10 is composed of an inner cylindrical body 11 and an outer cylindrical body 12, and is embedded in a hole made in the ground.

[0015] <Inner cylindrical body 11> The inner cylindrical body 11 is formed of a ring-shaped flange portion 20 that forms the periphery of the opening, a tapered portion 21 having a slope 23 formed downward from the flange portion 20, and a cylindrical portion (with an inner diameter of approximately 75 mm) 22 connected to the lower end of the tapered portion 21. In the example of Figure 1, the tapered portion 21 has a slope 23 formed at a predetermined angle from the upper periphery of the tapered portion 21 toward the upper opening edge of the cylindrical portion 22, and has the function of guiding the animal's leg downward. A notch 61 is formed in a part of the flange portion 20 of the inner cylindrical body 11. The formation of this notch 61 allows the hook portion 55, which constitutes the wire release portion 50 described later, to move up and down within the notch 61. Through holes 42 are formed in multiple locations (six locations in the example of Figure 1) on the peripheral surface of the flange portion 20. The number of through holes 42 is not limited to six; at least two or more are sufficient. The function of the through-hole 42 will be described later.

[0016] When an animal's leg (e.g., a hoof) enters the upper opening of the inner cylindrical body 11, the leg slides down the slope of the tapered section 21 and is guided to the upper opening of the cylindrical section 22. Note that, in addition to a sloped shape, any shape that allows the animal's leg to slide down may also be a shape that alternates between vertical and sloped surfaces. The inner diameter of the cylindrical section is preferably about 75 mm so that when an animal with relatively small hooves, such as a wild boar or Japanese deer (ungulates), steps on it, the hooves can reach the pedal 51 described later. The inner cylindrical body 11 is made of a resin material such as polyvinyl chloride, but is not limited to this as long as it has the required strength.

[0017] <Outer cylindrical body 12> The outer cylindrical body 12 houses the inner cylindrical body 11 and has the function of holding a trap loop (trap portion) 71 that constitutes a wire member 70 for tying the legs of an animal guided from the upper end opening of the inner cylindrical body 11. A notch 60 is formed on the upper end edge surface of the outer cylindrical body 12, at a position corresponding to the notch 61 formed on the flange portion 20 of the inner cylindrical body 11. The formation of this notch 60 allows the hook portion 55 that constitutes the wire release portion 50, which will be described later, to move up and down within the notch 60. Multiple through holes (not shown) (6 in the example of Figure 1) are formed on the upper end edge surface of the outer cylindrical body 12 through which screws 41 for fixing the inner cylindrical body 11 after it has been housed are inserted. The number of these screws 41 and through holes (not shown) is not limited to 6, and it is sufficient to have the same number as the number of through holes 42 described above, and to have at least 2 or more.

[0018] The fixing of the inner cylindrical body 11 to the outer cylindrical body 12 is performed as follows. After the inner cylindrical body 11 is accommodated inside the outer cylindrical body 12, a screw 41 is inserted through a through-hole 42 formed in the flange portion 20 of the inner cylindrical body 11, a through-hole (not shown) formed in the upper end edge surface of the outer cylindrical body 12, and a through-hole 43 formed in a wire holding claw 40 described later, and fixed by screwing to the upper end edge surface 44 of the outer cylindrical body 12. In the embodiment, the fixing of the inner cylindrical body 11 to the outer cylindrical body 12 is described as an example of screwing, but the lower surface of the flange portion 20 of the inner cylindrical body 11 and the upper end edge surface 44 of the outer cylindrical body 12 may be adhered or welded with an adhesive.

[0019] As shown in FIG. 2, the outer cylindrical body 12 has an inner diameter capable of accommodating the inner cylindrical body 11. Specifically, as shown in the figure, the inner diameter of the outer cylindrical body 12 is formed in a cylindrical shape slightly larger than the outer diameter of the opening (the upper end edge of the tapered portion 21) of the inner cylindrical body 11. In this case, the outer cylindrical body 12 is formed of the same material as the inner cylindrical body 11, but is not limited thereto as long as it has a predetermined strength.

[0020] A wire release portion 50 is disposed inside the cylindrical portion 22 of the inner cylindrical body 11 on the lower end side of the outer cylindrical body 12. A plurality (six in the example of FIG. 1) of wire holding claws 40 for holding a loop for trap (trap portion) 71 are formed at a predetermined interval on the outer peripheral edge of the upper end of the outer cylindrical body 12.

[0021] The wire release part 50 is composed of a pedal 51, a connecting member 52 with one end connected to the pedal 51, and a rod-shaped release member 54 with one end connected to the connecting member 52. A hook part 55 is formed at the other end of the rod-shaped release member 54. A through hole 56 is formed near the middle part of the connecting member 52 for inserting a rod-shaped fulcrum member 53. Both ends of the rod-shaped fulcrum member 53 are fixed to the inner peripheral surface of the cylindrical part 22 using a fixing member (not shown) such as a screw. The hook part 55 has an L-shaped shape with the end of the hook part 55 facing upward. The connecting member 52 can rotate in the axial direction with this rod-shaped fulcrum member 53 as a fulcrum. That is, when the weight of the animal's leg is applied to the upper surface of the pedal 51, the hook part 55 formed at the other end of the connecting member 52 rotates (moves) upward toward the upper peripheral edge of the outer cylindrical body. Note that the connecting member 52 and the rod-shaped fulcrum member 53 may be integrally formed, or they may be connected with screws or the like respectively.

[0022] [Wire member 70] Since the wire member 70 is well-known, a detailed description thereof is omitted. The wire member 70 is at least composed of a loop for trap (trap part) 71, a spring 73, and a spring case (not shown).

[0023] The wire including the loop for trap 71 is, for example, composed of a wire with a diameter of 4 mm or more. Also, on one end side of the wire, a loop for trap 71 that can be expanded and contracted by passing the other end through an annular part (not shown) provided at one end is formed. Note that the inner diameter of the wire including the loop for trap 71 held by the wire holding claw 40 is regulated by law to be 120 mm or less in principle (as an exception, in Nagano Prefecture, it may exceed 120 mm).

[0024] The spring 73 is an example of a biasing member, and as shown in Figure 1, it generates a biasing force that reduces the trap loop 71 when the wire is inserted through it. The spring case (not shown) is cylindrical in shape and houses the compressed spring 73. The trap loop 71 is held by the wire holding claw 40 with the spring 73 compressed to generate a biasing force. The operation of the hook portion 55 and the wire member 70 after the animal's leg is guided will be described later. Note that the form (structure) of the wire member 70 is not limited to the above form, as long as it has the function described above, that is, the function of generating a biasing force that reduces the trap loop.

[0025] [Cover member 14] As shown in Figure 1, the cover member 14 is a disc-shaped plate member and is placed on the upper surface of the inner cylindrical body 11 so as to cover the trap loop 71 held by the wire-holding claw 40 of the inner cylindrical body 11. The cover member 14 has the function of concealing (camouflaging) the snare trap 1 by placing soil, dead leaves, etc. on top of it. The cover member 14 is made of a flexible material (for example, a thin sheet of resin).

[0026] The cover member 14 has a through hole 16 in the center, and radial cuts 18 are formed around the through hole 16. In this case, the length of the cuts 18 can be set to an appropriate size depending on the type of animal to be captured, but it is preferable that the length be slightly shorter than the diameter of the cylindrical part 22 of the inner cylindrical body 11 and shorter than the length of the leg of the bear, the animal to be protected. The shape of the cover member 14 is not limited to a disc shape, and may be polygonal or rectangular, for example. Also, to prevent the cover member 14 from shifting position, side plates (not shown) may be formed extending vertically downward from the periphery of the cover member 14. Furthermore, if the cuts 18 are radial, they may be radial with straight lines as the cut lines as shown in Figure 1, or radial with wavy lines, curves, etc.

[0027] The legs of animals such as wild boars, Japanese deer, and bears are guided into the notches in the cover member 14, and thereafter wild boars and Japanese deer (pests: see Figure 5) are reliably captured, while bears (protected animals) that walk using the entire sole of their large foot surface are not captured. This will be explained in the description of the operation of the snare trap 1 below.

[0028] [Setting up snare trap 1] The following describes how to set up snare trap 1.

[0029] First, I will explain how to set up (set) the snare trap 1. First, select a location that is likely to be a passageway for the animal to be captured. Then, dig a hole in the ground at the installation site that is large enough to bury the cylindrical member 10.

[0030] Next, assemble the snare trap 1. First, insert the inner cylindrical body 11 into the outer cylindrical body 12. Then, loosen the screw of the spring stopper (not shown) to make it movable, and then adjust the trap loop 71 so that the diameter of the loop is larger than the outer diameter of the outer cylindrical body 12. Next, as shown in Figure 2, wrap the trap loop 71 around the wire while holding it between the wire-holding claw 40 of the outer cylindrical body 12 and the upper peripheral edge of the inner cylindrical body 11. At that time, hold the trap loop 71 by resting a part of the trap loop 71 on the L-shaped part of the hook part 55.

[0031] Next, the spring case is brought closer to the cap 75, compressing the spring 73 and housing it inside the spring case. Subsequently, the spring stopper (not shown) is moved to the base end (lower end in the figure). This maintains a state in which the biasing force generated by the compression of the spring 73 acts on the trap loop 71 in a direction that reduces the trap loop 71, as shown in Figure 3, and also maintains a state in which the trap loop 71 is tightened inward against the upper peripheral edge of the inner cylindrical body 11 by the biasing force of the spring 73.

[0032] Next, the cylindrical member 10 is buried in the hole dug in the ground, and then the cover member 14 is placed on the outer cylindrical body 12 so as to cover the trap loop 71 wrapped around the periphery of the outer cylindrical body 12. Next, soil, dead leaves, etc. are placed on top of the cover member 30 to camouflage it. Then, the other end 71b (see Figure 1) of the wire 71 is tied to a standing tree. With this, the installation of the snare trap 1 is complete.

[0033] [Operation of snare trap 1] The operation of snare trap 1 is described below.

[0034] For example, when a target animal (pest) such as a wild boar or Japanese deer (ungulate) with a relatively small underside area of ​​hooves steps on the cover member 14 of the snare trap 1 with its hooves (legs), the upper surface of the cover member 14, which is divided by the notches 18, elastically deforms inward towards the inner cylindrical body 11, and consequently the insertion hole (see Figure 1) in the center of the upper surface of the cover member 14 expands (increases in diameter). As a result, the leg of the target animal is guided to the center of the cover member 14, inserted through the insertion hole, and securely inserted into the interior 11a of the inner cylindrical body 11.

[0035] When the pedal 51, located below the interior 11a of the inner cylindrical body 11, is stepped on by the leg (hoof) of the animal to be captured, the connecting member 52 rotates counterclockwise with respect to the axial direction, using the rod-shaped pivot member 53 as a pivot point (pivot axis). Then, the rod-shaped release member 54 above the rod-shaped pivot member 53 moves upward, and the hook portion 55 also moves upward. When the hook portion 55 moves upward, the trap loop 71, which is held between the wire-holding claw 40 and the upper peripheral edge of the outer cylindrical body 12, is released, and the trap loop 71 is retracted by the biasing force of the spring 73.

[0036] Therefore, it is possible to reliably capture animals (pests) such as wild boars and Japanese deer (ungulates) that have hooves with a relatively small surface area on the underside, and thus ensure the capture of the target animals.

[0037] On the other hand, when a bear (a protected animal), which is a plantarfoot animal with a large surface area on its soles and walks using the entire sole, steps on the cover member 14 of the snare trap 1 with its leg, the upper surface of the cover member 30, which is divided by the notch 18 (see Figure 1), elastically deforms toward the inside 11a side of the inner cylindrical body 11. However, the leg remains positioned at the upper opening of the cylindrical part 22 of the inner cylindrical body 11 and does not penetrate any further downwards. This is because the diameter of the upper opening of the cylindrical part 22 is narrower than the surface area of ​​the bear's foot. Therefore, the trap loop 71 does not shrink, and the protected animal leaves the area without its leg being caught in the snare trap 1. As a result, the wire is not tied to the bear's leg by the trap loop 71, and the bear is not accidentally captured.

[0038] <Embodiment 2> Embodiment 2 of the snare trap will be described below with reference to the drawings. Embodiment 2 is identical to Embodiment 1 except for the addition of a wire detachment prevention member 80 and a receiving member 90 into which the wire detachment prevention member 80 is inserted. Therefore, only the differences will be described, and the descriptions of similar parts will be omitted. Also, if there is no need to distinguish between similar parts, the same reference numerals may be used.

[0039] As shown in Figure 1 (see the partially enlarged perspective view in Figure 1), the wire detachment prevention member 80 is composed of a convex plate-shaped member 84 consisting of a convex portion 82 and a base portion 83 in a plan view, and a vertical plate-shaped member 85 extending vertically upward from the base portion 83. The receiving member 90 is substantially rectangular in shape, as shown in Figure 1, and is fixed to a part of the upper end edge surface of the tapered portion 21 of the inner cylindrical body 11. A gap is formed between the upper end edge surface of the tapered portion 21 and the receiving member 90 that is large enough for the convex portion 82 of the wire detachment prevention member 80 to be inserted. The receiving member 90 is fixed to the upper end edge surface of the tapered portion 21 using a screw 91 and a washer (not shown as it is formed on the back surface). After winding the wire 71 while holding it between the wire holding claw 40 and the upper peripheral edge of the outer cylindrical body 12, inserting the protrusion 82 into the wire detachment prevention member 80 causes the wire of the trap loop 71 to come into contact with the lower surface of the convex plate-shaped member 84, thereby preventing the trap loop 71 from coming off upward.

[0040] Furthermore, in the above embodiment 2, an example was described in which the wire detachment prevention member 80 is provided at one location on the upper edge surface of the tapered portion 21 of the inner cylindrical body 11. However, the wire detachment prevention member 80 may be provided at two or more locations on the upper edge surface of the tapered portion 21 of the inner cylindrical body 11. In this case, it is possible to more reliably prevent the trap loop 71 from detaching upward.

[0041] It should be noted that the embodiments of the present invention are not limited to those described above, and various modifications are possible without departing from the spirit of the invention. [Explanation of Symbols]

[0042] 1... Snare 10...Cylindrical member 11...Inner cylindrical body 12...Outer cylindrical body 14…Cover component 20... Guard part 21... Tapered section 22...Cylindrical part 40…Wire retaining claw (retaining claw part) 41... Screw 42, 43… Through holes 50...Wire release section 51...Pedal 52…Connecting member 53…Rod-shaped pivot member 54…Rod-shaped release member 55...Hook part 56…Through hole 60... Notch 61... Notch 70…Wire component 71...Trap Loop 73... Spring 75... Cap 80...Wire detachment prevention part 82... protruding part 83...Base 84...Convex plate-shaped member 85…Vertical plate-shaped member 90…Receiving member 91... Screw

Claims

1. An inner cylindrical body formed by a tapered portion extending downward from the opening periphery, and a cylindrical portion connected to the tapered portion, It comprises an outer cylindrical body having multiple retaining claws formed at predetermined intervals on the upper outer circumference of the trap, which hold the trap loop that constitutes a wire member biased by a spring to tie the legs of the animal to be captured, A wire release mechanism having at least a pedal is positioned at the lower end of the inner cylindrical body, and the trap loop is released from the retaining claw in conjunction with the load on the pedal. A snare trap characterized by the following:

2. When a downward force is applied to the pedal, it rotates around a predetermined pivot point, causing the hook portion formed at one end of the pedal to move inward, and the trap loop detaches from the retaining claw portion and is tied to the leg of the animal to be captured. The snare trap according to feature 1.

3. A cover member is placed over the upper surface of the inner cylindrical body, with an insertion hole formed in the center and radial cuts formed around the insertion hole. The snare trap according to feature 1 or 2.

4. A wire detachment prevention member is provided, which in a plan view consists of a convex plate-shaped member comprising a convex portion and a base portion, and a vertical plate-shaped member extending vertically from the base portion. A substantially rectangular receiving member is placed on a part of the upper edge surface of the tapered portion. With the trap loop held in place by the retaining claw portion, the convex plate-shaped member of the wire detachment prevention member is inserted between the upper edge surface of the tapered portion and the receiving member. The snare trap according to feature 1 or 2.

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