Electric pasture fence wire holder and post having the same

Abstract

To manufacture a mechanism for preventing the collapse of a post due to the movement of a wire of an electric pasture fence inexpensively.SOLUTION: A holder 31 of a wire of an electric pasture fence which is attached directly to a post 7 or to each of multiple pipes 40 inserted into the post 7, is formed of a first spring member 41, a second spring member 42, and a coil spring 43 made of spring wire material, and a wire holder 44 attached to a folded portion of the second spring member 42. One end of the first spring member 41 is fixed to the post or pipe and a hook is provided at the other end, and a hook is also provided at a free end of the second spring member 42. The first spring member 41 is inserted into the coil spring 43 from one side and the second spring member 42 is inserted from the other side, and the coil spring 43 is positioned between the hooks of them. With this configuration, when a wire 2 held by the wire holder 44 is pulled, the second spring member 42 compresses the coil spring 43 and moves, and when the tensile force is removed, the coil spring 43 returns to its original position, preventing the post of the electric fence from collapsing when the wire 2 is pulled.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present application relates to a wire retainer for an electric fence and a post comprising the same. [Background technology]

[0002] Conventionally, physical animal fences using wires or fences are often easily broken and breached by livestock and wild animals. For this reason, electric fences for animals have become widespread. These fences apply a high voltage of about 7,000 volts to conductive wires (hereinafter simply referred to as wires) stretched between posts, and send an electric shock to repel livestock and wild animals that touch the wires. An electric fence is a fence in which wires are strung, insulated from the ground, between posts set at intervals around the perimeter of cultivated land where it is desired to prevent animals from entering, and high-voltage pulses are applied to the wires from a high-voltage power source at regular intervals. Although electric fences are simple in structure, they have the psychological effect of frightening animals that touch the wires and therefore do not approach them.

[0003] On the other hand, in such electric fences, if the wire gets caught on the legs or corners of an animal for some reason and a tensile load is applied to a nearby post, the wire may break, the insulators that string the wire may be damaged, or the post may collapse. In particular, if the wire is not fixed to the post, the tensile load applied to the wire is applied to the corner post installed at the corner of the electric fence. If the tensile load applied to the corner post is within the physical tolerance of the corner post, the wire may break. Also, if the wire is strong, there is a problem that the corner post may deform or break, causing the electric fence to stop functioning.

[0004] In response to these problems, a corner post for a permanent animal fence has been applied for and patented in the past, in which the wire holding portion of the wire holder attached to a rigid support that forms the corner post is made movable, so that the wire holding position changes when a tensile load is applied to the wire, eliminating the risk of the wire breaking or the support collapsing (see Patent Documents 1 and 2). In the inventions disclosed in Patent Documents 1 and 2, the wire holder and wire are returned to their original state when the tensile load from the animal is no longer applied to the wire. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6706853

[0006] [Patent Document 2] Patent No. 6888790 Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the corner post of the permanent animal fence disclosed in Patent Document 1 and the post for holding the wire in the permanent animal fence disclosed in Patent Document 2, the wire holder includes a bracket fixed to the post, a first arm rotatably attached at one end to the bracket, a second arm rotatably attached to the tip of the first arm, a spring that biases the first and second arms in the direction of approaching each other, and a holder that holds the wire at the tip of the second arm, resulting in a large number of parts. Furthermore, the holder at the tip of the second arm includes a pulley that can change the holding position of the wire. And, because each component of the wire holder is made of stainless steel, which is resistant to rust and expensive, there is a problem that the cost of the wire holder is high.

[0008] In one aspect, in view of the above problems, it is an object of the present invention to provide a wire holder for an electric fence that has the same functions as the wire holders disclosed in Patent Documents 1 and 2, but that can be attached to a post or a sleeve that is inserted into a support that forms a post, has a simple structure, and is inexpensive. In another aspect, it is also an object of the present invention to provide a post equipped with such a holder. [Means for solving the problem]

[0009] According to one embodiment, there is provided a wire holder for an electric fence comprising: a coil spring; a loop portion formed with an opening through which a cylindrical member can pass; a first base material including: a coil spring; a loop portion formed with an opening through which a cylindrical member can pass; a pair of first parallel portions extending from the loop portion so as to pass inside the coil spring and having tips protruding from one end of the coil spring; and a pair of first hook portions arranged at the tips of the pair of first parallel portions and engaging with the other end of the coil spring when one end of the coil spring is compressed from the loop portion side to receive a load from the coil spring; a support portion arranged facing the loop portion with respect to the coil spring; a pair of second parallel portions extending from the support portion so as to pass inside the coil spring and having tips protruding from one end of the coil spring; and a pair of second hook portions arranged at the tips of the pair of second parallel portions and compressing one end of the coil spring when the support portions move in a direction away from the loop portions; and a wire holder supported by the support portion and holding the wire.

[0010] According to another aspect, there is provided a post that is a wire holder for an electric fence having a coil spring, a first base material including a loop portion formed with an opening through which a cylindrical member can pass, a pair of first parallel portions extending from the loop portion to pass inside the coil spring and having tips protruding from one end of the coil spring, and a pair of first hook portions arranged at tips of the pair of first parallel portions and engaging with the other end of the coil spring when the coil spring is compressed from the loop portion side to receive a load from the coil spring, a support portion arranged opposite the loop portion with respect to the coil spring, a pair of second parallel portions extending from the support portion to pass inside the coil spring and having tips protruding from the other end of the coil spring, and a pair of second hook portions arranged at tips of the pair of second parallel portions and compressing one end of the coil spring when the support portions move in a direction away from the loop portions, and a wire holder supported by the support portions to hold the wire. Effect of the Invention

[0011] The disclosed wire retainer for an electric fence and a post equipped with said retainer have the advantage that, even if an animal pulls on the wire strung on the electric fence and a large load is placed on the retainer or the post equipped with the retainer, it is possible to provide an inexpensive retainer or a post equipped with said retainer that can return to its original state after the load is released. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1A is a side view showing the structure of a hanging device related to the present invention attached to a corner post disclosed in Patent Documents 1 and 2, and FIG. 1B is a side view showing the operation of the hanging device shown in FIG. [Diagram 2] FIG. 1 is a side view showing the structure of a corner post disclosed in Patent Documents 1 and 2. [Diagram 3]FIG. 1 shows the components of a first embodiment of a wire holder for an electric fence of the present invention, and a pipe to which the wire holder is attached, where (a) is a perspective view of an example of a first spring member, (b) is a perspective view of an example of a second spring member, (c) is a perspective view of a compression coil spring, (d) is a perspective view of an example of a wire holder, and (e) is a perspective view of a polyvinyl chloride pipe to which the first spring member shown in (a) is attached. [Figure 4] FIG. 3(a) is a perspective view showing the components of the wire holder for an electric fence of the first embodiment shown in Figures 3(a) to (d) assembled and attached to the pipe shown in (e), FIG. 3(b) is a side view showing the wire holder shown in Figure 3(d) in an open state, and FIG. 3(c) is a side view showing the wire holder shown in (b) in a closed state. [Diagram 5] FIG. 5(a) is a schematic side view showing the state in which a wire is held by the wire holder for an electric fence of the first embodiment when attached to the pipe shown in FIG. 4(a), and FIG. 5(b) is a schematic side view showing the operation of the wire holder for an electric fence when the wire shown in FIG. 4(a) is pulled by an external force. [Figure 6] FIG. 5(b) is a side view showing the structure of a corner post having a wire holder for an electric fence according to the first embodiment shown in FIG. 5(a) attached thereto and formed by attaching a plurality of pipes to a single support. [Figure 7] 7(a) is a side view showing a closed state of an embodiment wire holder different from the wire holder shown in Figure 3(d) used in the wire holder for an electric fence in the second embodiment of the present invention, (b) is a plan view of the wire holder shown in (a), (c) is a side view showing the wire holder shown in (a) in an open state, (d) is a plan view of the wire holder shown in (c), and (e) is a partial side view showing a state in which a wire is held in the wire holder for an electric fence in the second embodiment using the holder shown in Figures 7(a) and (b). [Figure 8]7(a) to (d), in which (a) is a side view showing the wire holding device of the first modified example in an open state, (b) is a side view showing the wire holding device of the first modified example shown in (a) in a closed state, (c) is an assembled oblique view showing the components of the wire holding device of the second modified example, (d) is a side view showing the wire holding device of the second modified example shown in (c) in a closed state after assembly, and (e) is an oblique view showing the wire holding device of the third modified example in a closed state. [Figure 9] 13A and 13B are diagrams showing the components of a wire holder for an electric fence according to a third embodiment of the present invention, where (a) is a perspective view of an example of a first spring member, (b) is a perspective view of an example of a second spring member, (c) is a perspective view of a compression coil spring, (d) is a side view showing the configuration of a wire holder to be held at the tip of the second spring member shown in (b), (e) is a front view of (d), and (f) is a perspective view showing the state in which the wire holder shown in (d) is held by the second spring member and holds the wire. [Figure 10] FIG. 10(a) is a schematic side view showing a wire holder for an electric fence according to a third embodiment of the present invention, formed by assembling the components shown in Figures 9(a) to (f), attached to a pipe and showing the wire being held by the wire holder, and FIG. 10(b) is a schematic side view showing the operation of the wire holder for an electric fence when the wire held by the wire holder for an electric fence shown in Figure 9(a) is pulled by an external force. [Figure 11] 8(a) is an assembled oblique view of a wire holder according to a fourth embodiment of the present invention which uses a wire holder according to a second modified example of the second embodiment of the present invention shown in Figures 8(c) and (d), and (b) is a side view showing the wire holder shown in (a) in a closed state after assembly. [Figure 12] FIG. 11(a) is a schematic side view showing a state in which a wire is held by a wire holder for an electric fence according to a fourth embodiment of the present invention incorporating the wire holding tool shown in FIG. 11(b), and FIG. 11(b) is a schematic side view showing the operation of the wire holder for an electric fence when the wire held by the wire holder for an electric fence shown in FIG. 11(a) is pulled by an external force. [Figure 13](a) is an assembled perspective view of a modified example of a wire holder according to a fourth embodiment of the present invention using the wire holder according to the third embodiment of the present invention shown in FIGS. 9(d) to (f), and (b) is a side view showing a closed state after assembly of the wire holder shown in (a). [Figure 14] (a) is a schematic side view showing a state in which a wire is held by a wire holder for an electric fence incorporating a wire holder used in a modified example of the fourth embodiment shown in FIGS. 13(a) and (b), and (b) is a schematic side view showing the operation of the wire holder for an electric fence when the wire held by the wire holder for an electric fence shown in (a) is pulled by an external force. [Figure 15] This shows a part of a wire holder for an electric fence according to a fifth embodiment of the present invention. (a) is a perspective view showing an example of a spring cover attached to a compression coil spring of the wire holder, (b) is a partially enlarged view showing an example of a locking groove for locking a hook portion of a first spring member provided in the spring cover, (c) is a partially enlarged view showing another example of the locking groove for locking the hook portion of the first spring member provided in the spring cover, and (d) is a partially enlarged view showing still another example of the locking groove for locking the hook portion of the first spring member provided in the spring cover. [Figure 16] It is a schematic side view showing a state in which the spring cover shown in FIG. 15(a) is attached to the compression coil spring of the wire holder shown in FIG. 5(a). [Figure 17] (a) is a perspective view showing another form of the spring cover attached to the compression coil spring, and (b) is a view seen from the direction of arrow B of the spring cover in (a).

Modes for Carrying Out the Invention

[0013] Hereinafter, embodiments of the present application will be described in detail based on specific examples with reference to the accompanying drawings. In the embodiments described below, the same or similar elements are denoted by common reference numerals, and the scale of the drawings is appropriately changed for easy understanding.

[0014] 1 is a side view showing the structure of a corner post CP disclosed in Patent Documents 1 and 2, where (a) is a partial side view showing a state in which no external force is applied to the wire, and (b) is a partial side view showing a state in which an external force is applied to the wire. A plurality of extendable wire holders 20 are fixed to a support 7 that serves as the corner post CP. As shown in FIG. 1(a), the wire holder 20 includes a bracket 21 fixed to the support 7, a first arm 23 attached to the bracket 21 by a rotating shaft 22, a second arm 25 attached to the first arm 23 by a rotating shaft 24, a spring 28 that pulls the second arm 25 toward the first arm 23, and a fastener 27 and pulley 11 attached to the tip of the second arm 25 to hold the wire 2.

[0015] In wire holder 20 having the above structure, when wire 2 is pulled by an animal, the angle between first arm 23 and second arm 25 increases against spring 28 as shown in Fig. 1(b), and pulley 11 moves in a direction away from support 7, allowing wire 2 to be moved. As a result, wire holder 20 can prevent wire 2 from being cut and corner post CP from collapsing. When the animal comes off wire 2 and wire 2 is no longer pulled, the contraction force of spring 28 returns wire holder 20 to the state shown in Fig. 1(a).

[0016] Fig. 2 shows a corner post CP disclosed in Patent Documents 1 and 2. In the corner post CP, three sleeves 7R1 are inserted into a support 7, and a bracket 21 of a wire holder 20 is fixed to each sleeve 7R1. A cap 15 is fitted onto the tip of the support 7 to prevent the sleeve 7R1 from coming off the support 7. The three sleeves 7R1 inserted into the support 7 can each rotate around the support 7 independently. Therefore, even if any of the wires 2 is pulled, the sleeve 7R1 can rotate to absorb the deformation of the wire 2.

[0017] However, the wire holder 20 disclosed in Patent Documents 1 and 2 has a large number of parts, and because it is used outdoors, it uses stainless steel, which is less prone to rust and more expensive than iron, making it expensive. Furthermore, because multiple wire holders 20 are used for one post 7, the cost of the post 7 is high. The present invention provides a wire holder for an electric fence and a post equipped with said holder that have the same operation and function as the wire holder 20 disclosed in Patent Documents 1 and 2, but at a significantly reduced cost.

[0018] FIG. 3 shows the components of the wire holder for an electric fence according to the first embodiment of the present invention. In FIG. 3, (a) shows a first spring member 41 (called a first base material), (b) shows a second spring member 42 (called a second base material), (c) shows a compression coil spring 43 (called a coil spring), and (d) shows a wire holder 44. These are combined to form the wire holder, which is attached to a polyvinyl chloride pipe 40 (called a cylindrical member) having a predetermined length as shown in (e). The first spring member 41, the second spring member 42, and the compression coil spring 43 are made of stainless steel spring wire, and the wire holder 44 is made of synthetic resin. The synthetic resin used for the wire holder 44 is a material that has low surface resistance after molding and allows the held wire to slide easily. For example, glass fiber-reinforced nylon can be used. In the first embodiment, the wire holder for the electric fence is attached to a polyvinyl chloride pipe 40 having a predetermined length, but the wire holder for the electric fence may be attached directly to a post erected on the ground. The shapes of each component part will be described below.

[0019] The first spring member 41 shown in FIG. 3(a) has a loop portion 41L at one end, which is formed with an opening through which a cylindrical member can pass and can be crimped to the outer circumferential surface of a polyvinyl chloride pipe (sometimes called a sleeve) 40, a pair of parallel portions 41P (called first parallel portions) extending from the loop portion 41L at the center and whose tips protrude from one end of a compression coil spring 43 and are parallel when no external force is applied, and a pair of hook portions 41H (called first hook portions) folded back outward are arranged at the other tips of the pair of parallel portions 41P. In the wire holder for an electric fence of the first embodiment, the parallel portions 41P of the first spring member 41 are folded at both ends of the loop portion 41L so as to be parallel to the vertical direction to the ground. The pair of hook portions 41H are arranged side by side in a direction parallel to the penetrating direction of the opening of the loop portion 41L. The hook portion 41H can be inserted into the inside of the compression coil spring 43 by bringing one end of the parallel portion 41P close to each other so that they are overlapped, and then hooked onto the end of the compression coil spring 43. Therefore, the length of the parallel portion 41P is longer than the overall length of the compression coil spring 43. The loop portion 41L has a spiral shape wound at least two times. The number of turns of the loop portion 41L is two in the first embodiment, but it may be three or more.

[0020] The second spring member 42 shown in FIG. 3(b) has a shape in which the spring wire is folded back in a U-shape at a folding back portion 42T (called a support portion) disposed opposite the loop portion 41L, and the center portion of the folded back second spring member 42 is a pair of parallel portions 42P (called second parallel portions) that extend from the folding back portion 42T and are parallel in a state in which the tip ends of the parallel portions 42P protrude from the other end of the compression coil spring 43 when no external force is applied. The distance between the parallel portions 42P is smaller than the inner diameter of the compression coil spring 43 and larger than the thickness of the wire holder 44. The free end side of the parallel portions 42P is a pair of hook portions 42H (called second hook portions) that are disposed at the tips of the pair of parallel portions 42P and folded back outward, and one end of the parallel portions 42P can be inserted inside the compression coil spring 43 while being brought close to each other and overlapped. The folded portion 42T may be a straight portion as shown in the figure in order to hold the wire holder 44, but may be formed in an arc shape. The length of the straight portion is a length that can pass through the inside of the compression coil spring 43, and the length of the straight portion or the diameter in the case of an arc shape is a length that can pass through the inside of the compression coil spring 43. The hook portion 42H is hooked on the end of the compression coil spring 43 after being overlapped and inserted inside the compression coil spring 43. Therefore, the length of the parallel portion 42P is formed longer than the entire length of the compression coil spring 43. In the first embodiment, the parallel portion 41P of the first spring member 41 is arranged parallel to the ground in a vertical direction, so that the parallel portion 42P of the second spring member 42 is inserted into the compression coil spring 43 so as to be parallel to the ground.

[0021] As described above, the compression coil spring 43 shown in FIG. 3(c) has an inner diameter through which the hook portion 41H of the overlapping first spring member 41 and the hook portion 42H of the overlapping second spring member 42 can be inserted. The overall length of the compression coil spring 43 is shorter than the length of the parallel portion 41P of the first spring member 41 and the parallel portion 42P of the second spring member 42. The hook portion 41H of the first spring member 41 is hooked to one end of the compression coil spring 43, and the hook portion 42H of the second spring member 42 is hooked to the other end. When the parallel portion 42P of the second spring member 42 moves inward, the compression coil spring 43 is compressed by the hook portion 42H of the second spring member 42 and contracts. When the compression coil spring 43 is compressed, the hook portion 41H of the first spring member 41 is engaged with one end of the compression coil spring 43, and the hook portion 42H of the second spring member 42 is engaged with the other end of the compression coil spring 43. The load capacity of the compression coil spring 43 is set to about 10 kg.

[0022] In the first embodiment, as shown in Fig. 3(d), the wire holder 44 has a loop-shaped main body, and the loop can be opened and closed by moving a moving part 44M on a part of the main body. Specifically, a protrusion 44P is provided at the tip of the moving part 44M, and when the protrusion 44P is out of a groove 44D formed in the main body of the wire holder 44 as shown in Fig. 4(b), the loop of the wire holder 44 opens, and when the protrusion 44P is engaged with the groove 44D as shown in Fig. 4(c), the loop of the wire holder 44 closes. In addition, the main body of the wire holder 44 has a through hole 44H penetrating from the front to the back. The diameter of the through hole 44H is larger than the wire diameter of the second spring member 42.

[0023] Figure 4(a) shows a state in which a wire holder 31 for an electric fence, which includes a first spring member 41, a second spring member 42, a compression coil spring 43, and a wire holder 44 shown in Figures 3(a) to 3(d), is attached to a polyvinyl chloride pipe 40 shown in Figure 3(e). Here, steps (1) to (5) for assembling this wire holder 31 for an electric fence will be explained in order.

[0024] (1) First, the first spring member 41 is attached to a predetermined position of the polyvinyl chloride pipe 40 with the loop portion 41L of the first spring member 41 opened. (2) Next, with the hook portions 41H of the first spring member 41 brought close to each other and overlapped, the hook portions 41H are inserted into the inside of the compression coil spring 43 and moved so that the parallel portion 41P of the first spring member 41 is positioned inside the compression coil spring 43. (3) The hook portion 41H of the first spring member 41 expands when it comes out of the compression coil spring 43, so that the hook portion 41H is hooked onto the end of the compression coil spring 43.

[0025] (4) Here, the second spring member 42 has one hook portion 42H inserted into the through hole 44H of the wire holder 44, and the wire holder 44 is moved to the folded-back portion 42T of the second spring member 42. (5) Finally, the second spring member 42 is inserted from the free end side of the compression coil spring 43 with the wire holder 44 bringing the hook portion 42H of the second spring member attached to the folded portion 42T close to each other, overlapping and contracting them so that the parallel portion 42P is parallel to the ground, and when the hook portion 42H comes out of the compression coil spring 43, the hook portion 42H is hooked onto the end of the compression coil spring 43.

[0026] The wire holder 44 attached to the folded portion 42T of the second spring member 42 is in a state in which the protrusion 44P at the tip of the moving portion 44M is removed from the groove 44D as shown in FIG. 4(b) so that the loop of the wire holder 44 is discontinuous. In this state, a gap is formed between the moving portion 44M and the main body of the wire holder 44, so that the wire can be drawn into the loop of the wire holder 44 through the gap when the wire is tensioned. In addition, since the parallel portion 42P of the second spring member 42 is inserted into the compression coil spring 43 so as to be parallel to the ground, the wire holder 44 located at the folded portion 42T of the second spring member 42 is held (supported) by the folded portion 42T in a state perpendicular to the ground as shown in FIG. 4(c) (a cross section of the folded portion of the second spring member 42 in the through hole 44H of the wire holder 44 is not shown). Then, after the wire holder 44 has pulled the wire 2 into the loop of the wire holder 44, the protrusion 44P at the tip of the moving part 44M enters the groove 44D to close the wire holder 44. In the state shown in Figure 4(c), the main body of the wire holder 44 is closed, so that the electric fence wire 2 that has been pulled into the loop of the wire holder 44 will not come off the wire holder 44.

[0027] Fig. 5(a) shows a simplified view of the wire 2 held by the wire holder 31 for the electric fence shown in Fig. 4(a). The wires 2 are tensioned with a tension of 50 to 150 kgf per wire, and therefore the wire holder 44 holding the wires 2 is urged by the wires 2 in a direction away from the compression coil spring 43. As a result, the second spring member 42 to which the wire holder 44 is attached is also pulled by the wire 2 via the wire holder 44, and the compression coil spring 43 is compressed by the hook portion 42H. The compression force applied to the compression coil spring 43 is received by the hook portion 41H of the first spring member 41, and therefore the tension of the wire 2 is received by the polyvinyl chloride pipe 40 via the wire holder 44, the second spring member 42, the compression coil spring 43, and the first spring member 41.

[0028] In this state, when the wire 2 is pulled by the animal, as shown in Figure 5(b), the compression coil spring 43 is compressed through the wire holder 44 and the second spring member 42, and the wire holder 44 moves in a direction away from the polyvinyl chloride pipe 40, allowing the wire 2 to be moved. When the animal becomes detached from the wire 2 and the wire 2 is no longer pulled, the compression coil spring 43 returns to its original state and pulls the wire holder 44 through the second spring member 42, returning the wire holder 31 for the electric fence to the state shown in Figure 5(a).

[0029] Figure 6 shows the structure of a corner post CP formed by attaching three wire holders 31 for an electric fence shown in Figure 5(a) to a rigid post 7 embedded in the ground C. The corner post CP is assembled by fixing the above-mentioned wire holder 31 to a polyvinyl chloride pipe 40 by the loop portion 41L of the first spring member 41, and inserting three of these polyvinyl chloride pipes 40 into the post 7. The polyvinyl chloride pipe 40 inserted into the post 7 forms a rotation mechanism that can rotate relative to the post 7. After the three polyvinyl chloride pipes 40 with the wire holders 31 fixed thereto have been inserted into the post 7, a cap 15 is attached to the tip of the post 7 to prevent the polyvinyl chloride pipe 40 from coming off the post 7.

[0030] As shown in FIG. 6, in the corner post CP formed by inserting three polyvinyl chloride pipes 40, each having a wire holder 31 fixed thereto, into a post 7 protruding from the ground C at the corner of the electric fence, the three polyvinyl chloride pipes 40 inserted into the post 7 function as tensioning stages for tensioning the wire 2, and can rotate around the post 7 independently. Therefore, in the corner post CP of this embodiment, even if any of the wires 2 is pulled, the polyvinyl chloride pipe 40 corresponding to the pulled wire 2 rotates, thereby absorbing the deformation of the wire 2. In the corner post CP, the tensioning direction of the wire in each stage can be changed by changing the angle of the loop portion 41L of the first spring member 41 attached directly to the polyvinyl chloride pipe 40, which is the tensioning stage of the wire, or the post erected on the ground.

[0031] In addition, the corner post CP can be installed by simply attaching the necessary number of vinyl chloride pipes 40 with the wire holders 31 fixed to the support posts 7 protruding from the ground C, and the time and labor required for installation and removal can be significantly reduced. Furthermore, the vinyl chloride pipes 40 can distribute the stress on the wires 2 by rotating, and even if the wires 2 are pulled, the force applied to the support posts 7 can be reduced, and the corner post can be prevented from collapsing. Since the vinyl chloride pipes 40 are insulators, it is possible to prevent leakage of electricity between the corner post CP and the wires 2. If a claw for preventing the vinyl chloride pipes 40 from coming off is provided at least at one location on the inner peripheral surface of the vinyl chloride pipes 40, the claw for preventing the vinyl chloride pipes 40 from coming off the support posts 7 can make it difficult for the vinyl chloride pipes 40 to come off the support posts 7. The shape of the claws and the number of claws to be installed are not particularly limited. Furthermore, the vinyl chloride pipes 40 can be used as intermediate posts to be used on the ground C in the area between the two corner posts together with the above-mentioned corner post CP by attaching the wire holders 31 or non-stretchable wire holders.

[0032] FIG. 7 shows the structure of a wire holder 32 for an electric fence according to a second embodiment of the present invention, which differs from the wire holder 31 for an electric fence according to the first embodiment only in the structure of the wire holder 45, as shown in FIG. 7(e). The wire holder 32 for an electric fence according to the second embodiment differs from the wire holder 31 for an electric fence according to the first embodiment only in the structure of the wire holder 45. In the first embodiment, the wire holder 44 has a through hole 44H, and the second spring member 42 is inserted into the through hole 44H, and then the wire holder 44 is positioned at the folded-back portion 42T of the second spring member 42, and in this state, the second spring member 42 is inserted into the compression coil spring 43. On the other hand, the wire holder 45 of the second embodiment does not have a through hole for inserting the second spring member 42, and the wire holder 45 can be positioned at the folded-back portion 42T of the second spring member 42 by opening and closing a part of the wire holder 45. The wire holder 45 is made of stainless steel.

[0033] The wire holder 45 has a C-shaped base 45A as shown in the side view of FIG. 7(a), and a spring 45B that opens and closes the discontinuous portion 45C of the base 45A is provided at the discontinuous portion 45C. The spring 45B is U-shaped as shown in FIG. 7(b), and the two free ends have different lengths from the folded portion. The two free ends have shaft portions bent inward, and the two shaft portions are inserted into holes opened at different positions on the side of the base 45A, and serve as the rotation shafts of the spring 45B. As shown in FIG. 7(a), the spring 45B closes the discontinuous portion 45C when attached to the base 45A.

[0034] FIG. 7(c) shows a state in which an external force is applied to the spring 45B, causing the spring 45B to move and the wire holder 45 to open due to the discontinuous portion 45C. FIG. 7(d) shows a plan view of the wire holder 45 shown in FIG. 7(c). The two free ends of the spring 45B are inserted into holes opened at different positions on the side surface of the base portion 45A, so that the spring 45B is twisted when the wire holder 45 is opened by an external force, and returns to its original state when the external force is removed, causing the wire holder 45 to be in the closed state shown in FIG. 7(a). Therefore, in the second embodiment, the wire holder 45 can be positioned at the folded portion 42T of the second spring member 42 by applying an external force to the spring 45B to open the wire holder 45.

[0035] 7(e) shows the overall configuration of a wire holder 32 for an electric fence according to a second embodiment of the present invention. As in the first embodiment, a first spring member 41 is fixed to a polyvinyl chloride pipe 40 by a loop portion 41L, a compression coil spring 43 is positioned between the loop portion 41L and the hook portion 41H of the first spring member 41, and a second spring member 42 is inserted inside the compression coil spring 43. A wire holder 45 can be attached later to a folded portion 42T of the second spring member 42 protruding from the compression coil spring 43. By opening the spring 45B of the wire holder 45, a wire 2 can be inserted into the wire holder 45, and the wire 2 can be tensioned.

[0036] The electric fence wire holder 32 of the second embodiment formed as described above can be used to form a corner post CP by attaching the loop portion 41L of the first spring member 41 to the polyvinyl chloride pipe 40 in the same manner as in the first embodiment, and inserting the polyvinyl chloride pipe 40 into the post 7. The operation of the electric fence wire holder 32 of the second embodiment is the same as that of the electric fence wire holder 31 of the first embodiment, so further explanation will be omitted.

[0037] Here, three types of wire holders that can be used for wire holder 32 for an electric fence in a modified example of the second embodiment of the present invention will be described with reference to Figure 8, but the modified example of the second embodiment is not limited to the structure of these three types of wire holders. In the modified example of the second embodiment, the same polyvinyl chloride pipe 40, first spring member 41, second spring member 42 and compression coil spring 43 as in the first embodiment can be used.

[0038] 8(a) and (b) show the structure of a wire holder 51 of a first modified example of the second embodiment. The wire holder 51 of the first modified example has a C-shaped base 51A, one end of which is provided with a screw groove 51M, and the other end of which is provided with a sleeve 51S that can move the base 51A. The inner circumferential surface of the sleeve 51S is provided with a screw groove that screws into the screw groove 51M, and when the sleeve 51S is rotated to release the screwing of the inner circumferential surface and the screw groove 51M, the discontinuous portion 51C appears as shown in FIG. 8(a) and the wire holder 51 opens. When the sleeve 51S is rotated to screw the inner circumferential surface and the screw groove 51M, the wire holder 51 of the first modified example closes as shown in FIG. 8(b). The wire holder 51 of the first modified example is made of stainless steel, and can be used in the same manner as the wire holder 45 of the second embodiment.

[0039] Fig. 8(c) is a perspective view showing the structure of a wire holder 52 of a second modified example of the second embodiment, and Fig. 8(d) is a side view of (c). The wire holder 52 of the second modified example has a U-shaped base 52A having a curved portion, and both ends of the base 52A are bulged and provided with a screw hole 52N and a through hole 52H, respectively. Furthermore, the wire holder 52 of the second modified example has a rod 52L that is inserted into the through hole 52H at the end (also called the first free end) of the base 52A and screwed into the screw hole 52N at the opposite end (also called the second free end). A screw groove 52M is provided on the tip side of the rod 52L, and a flat plate portion 52P for rotating the rod 52L is provided at the opposite end. In the wire holder 52 of the second modified example, when the rod 52L is inserted into the through hole 52H and then the screw groove 52M of the rod 52L is screwed into the screw hole 52N, the wire holder 52 is closed as shown in Fig. 8(d). The wire holder 52 of the second modified example can be used in the same manner as the wire holder 45 of the second embodiment. The wire holder 52 of the second modified example is made of stainless steel.

[0040] FIG. 8(e) shows the structure of the wire holder 53 of the third modified example of the second embodiment, which is called a double ring. The wire holder 53 of the third modified example is made of stainless steel and has a ring shape, and one spring wire is wound in a circular shape with no gaps in close contact. The gap 53G between the spring wires is tightly held by spring force, and the gap 53G opens when an external force is applied, but closes when the external force is removed. In the wire holder 53 of the third modified example, the folded portion 42T (see FIG. 3) of the second spring member 42 described above is slid into the opened gap 53G in a state in which the gap 53G is opened by an external force, and the wire holder 53 is rotated to insert the folded portion 42T of the second spring member 42 into the inside of the wire holder 53. When the wire is held inside the wire holder 53, the gap 53G can be opened by an external force.

[0041] FIG. 9 shows components of a wire holder for an electric fence according to a third embodiment of the present invention. In FIG. 9, (a) shows a first spring member 41, (b) shows a second spring member 42, (c) shows a compression coil spring 43, and (d) to (f) show a wire holder 46, which are combined to form a wire holder, and the wire holder is attached to a polyvinyl chloride pipe (see FIG. 3(e)) having a predetermined length. The first spring member 41, the second spring member 42, and the compression coil spring 43 are formed from stainless steel spring wire as in the first embodiment, and the wire holder 46 is also made of stainless steel. The first spring member 41 may be directly attached to a post erected on the ground as in the first embodiment. The shapes of the individual components in this embodiment will be described below.

[0042] In the third embodiment, the loop portion 41L of the first spring member 41 shown in FIG. 9(a) is wound three times, and can be firmly pressed against the outer periphery of the polyvinyl chloride pipe. In the center, there is a parallel portion 41P that is parallel when no external force is applied, and at the other end, there is a hook portion 41H that is folded back outward. On the other hand, in the wire holder 31 for an electric fence of the first embodiment shown in FIG. 4, the parallel portion 41P of the first spring member 41 is folded at both ends of the loop portion 41L so as to be parallel to the vertical direction to the ground. In contrast, the parallel portion 41P of the third embodiment is folded at both ends of the loop portion 41L so as to be parallel to the ground. The pair of hook portions 41H are arranged side by side in a direction perpendicular to the penetrating direction of the opening of the loop portion 41L.

[0043] In the second spring member 42 shown in FIG. 9(b), the spring wire is folded back in a U-shape at the folded back portion 42T as in the first embodiment, and a parallel portion 42P is located in the center. The folded back portion 42T that holds the wire holder 44 is formed in an arc shape in the third embodiment. The shape of the second spring member 42 in the third embodiment is different from that of the second spring member 42 in the first embodiment in that the folded back portion 42T is curved rather than linear, but the structure of the other parts is the same as that of the second spring member 42 in the first embodiment. However, in the third embodiment, the parallel portion 41P of the first spring member 41 is disposed parallel to the ground, so that the insertion direction of the second spring member 42 into the compression coil spring 43 is different. That is, in the third embodiment, the parallel portion 42P of the second spring member 42 is inserted into the compression coil spring 43 so as to be perpendicular to the ground.

[0044] 9(c) is the same as that of the first embodiment, and after the overlapping hook portion 41H of the first spring member 41 and the hook portion 42H of the second spring member 42 are inserted through each other, one end of the spring is hooked to the hook portion 41H of the first spring member 41 and the other end of the spring is hooked to the hook portion 42H of the second spring member 42. The compression coil spring 43 is the same in that, when the second spring member 42 moves inside, it is compressed and contracted by the hook portion 42H of the second spring member 42 and has a load capacity set to about 10 kg.

[0045] In the third embodiment, as shown in Fig. 9(d), (e) and (f), the wire holder 46 has a base 46A that is V-shaped in side view, and the folded-back portion 46T of the base 46A is curved so as to engage with the folded-back portion 42T of the second spring member 42 described above when viewed from the front, and both ends of the base 46A are bulged and provided with a through hole 46H and a screw hole 46N, respectively. Furthermore, the wire holder 46 of the third embodiment has a rod 46L that is inserted into the through hole 46H at one end (also called the first free end) of the base 46A and is screwed into the screw hole 46N at the opposite end (also called the second free end) in addition to the base 46A. A screw groove is provided on the tip side of the rod 46L, and a flat plate portion 46P for rotating the rod 46L is provided at the opposite end. After the rod 46L is inserted into the through hole 46H, the threads of the rod 46L are screwed into the screw hole 46N to close the wire holder 46. The wire holder 46 of the third embodiment can be used in the same manner as the wire holder 52 of the second modified example of the second embodiment shown in Figures 8(c) and (d).

[0046] 9(a) to (c) are assembled in the same manner as in the first embodiment and attached to the polyvinyl chloride pipe 40. At this time, in the third embodiment, as in the second embodiment, it is not necessary to attach the wire holder 46 to the second spring member 42 in advance, and the wire holder 46 can be held by the folded-back portion 42T of the second spring member 42 as shown in FIG. 9(f) by loosening the rod 46L of the wire holder 46 to provide a gap between it and the base portion 46A.

[0047] FIG. 10(a) shows a state in which the wire 2 is held by the wire holder 33 for an electric fence formed by assembling the components shown in FIG. 9(a) to (f) and attaching them to a polyvinyl chloride pipe 40. Since the wire 2 is stretched with a tension of 50 to 150 kgf per wire, the wire holder 46 holding the wire 2 is urged by the wire 2 in a direction away from the compression coil spring 43. Therefore, the second spring member 42 to which the wire holder 46 is attached is also pulled by the wire 2 via the wire holder 46, and compresses the compression coil spring 43 by the hook portion 42H. The compression force applied to the compression coil spring 43 is received by the hook portion 41H of the first spring member 41, so the tension of the wire 2 is received by the polyvinyl chloride pipe 40 via the wire holder 46, the second spring member 42, the compression coil spring 43, and the first spring member 41.

[0048] In this state, when the wire 2 of the electric fence wire holder 33 is pulled by an animal, the compression coil spring 43 is compressed through the wire holder 46 and the second spring member 42, as shown in Figure 10(b), and the wire holder 46 moves in a direction away from the PVC pipe 40, allowing the wire 2 to be moved. When the animal comes off the wire 2 and the wire 2 is no longer pulled, the compression coil spring 43 returns to its original state and pulls the wire holder 46 through the second spring member 42, returning the wire holder 33 for the electric fence to the state shown in Figure 10(a).

[0049] Like the wire holder 31 for the electric fence of the first embodiment shown in Figure 6, the wire holder 33 for the electric fence of the third embodiment is attached to a polyvinyl chloride pipe 40 and three of these polyvinyl chloride pipes 40 are inserted through posts 7 embedded in the ground C to form a corner post CP.

[0050] Here, we will explain the electric fence wire holder 34 of the fourth embodiment of the present invention. In the electric fence wire holders 31-33 of the first to third embodiments, the electric fence wire 2 is simply hooked onto the wire holders 44, 45, 46 and 51, 52. On the other hand, the electric fence wire holder 34 of the fourth embodiment shown in Figure 12 is different in that a pulley 12 is incorporated into the wire holder 52 shown in Figures 8(c) and (d), and the electric fence wire 2 is movably held by the pulley 12. This will be explained in the following paragraphs using Figures 11 and 12.

[0051] FIG. 11(a) shows a wire holder 52 of a second modified example of the wire holder for an electric fence of the second embodiment of the present invention shown in FIG. 8(c) and (d), and a pulley 12 attached to a rod 52L of the wire holder 52. The wire holder 52 of the second modified example has a U-shaped base 52A with a curved portion at both ends thereof, and a screw hole 52N and a through hole 52H are provided. A rod 52L having a screw groove 52M at its tip is inserted through the through hole 52H, and the flat plate portion 52P is turned to screw the screw groove 52M into the screw hole 52N, thereby closing the wire holder 52. The wire 2 is then hooked and held by the rod 52L. On the other hand, in the fourth embodiment, the pulley 12 is inserted through the rod 52L which is inserted through the through hole 52H, and the screw groove 52M is screwed into the screw hole 52N to form the wire holder 47.

[0052] 11(b) shows a side view of wire holder 47 of the fourth embodiment. In wire holder 47 of the fourth embodiment, rod 52L is rotated to provide a gap between pulley 12 rotatably held by rod 52L and base 52A of wire holder 47, and wire 2 can be inserted into wire holder 47 from this gap to hold wire 2 on pulley 12. Therefore, wire holder 47 of the fourth embodiment can smoothly move wire 2 by rotating pulley 12 even when wire 2 moves slightly left and right.

[0053] Fig. 12(a) shows a state in which the wire 2 is held by the wire holder 34 for an electric fence according to a fourth embodiment of the present invention, which incorporates the wire holder 47 shown in Fig. 11(b). The wire holder 34 for an electric fence according to the fourth embodiment uses the first spring member 41 and the second spring member 42 shown in Figs. 3(a) and (b). Since the wire 2 is stretched with a tension of 50 to 150 kgf per wire, the wire holder 47 holding the wire 2 is biased by the wire 2 in a direction away from the compression coil spring 43. For this reason, the second spring member 42 to which the wire holder 47 is attached is also pulled by the wire 2 via the wire holder 47, and compresses the compression coil spring 43 by the hook portion 42H. The compression force applied to the compression coil spring 43 is received by the hook portion 41H of the first spring member 41, so that the tension of the wire 2 is received by the polyvinyl chloride pipe 40 through the wire holder 47, the second spring member 42, the compression coil spring 43 and the first spring member 41.

[0054] In this state, when the wire 2 is pulled by an animal, the compression coil spring 43 is compressed through the wire holder 47 and the second spring member 42 as shown in Fig. 12(b), and the wire holder 47 moves in a direction away from the polyvinyl chloride pipe 40, so that the wire 2 can be moved. Even if the wire 2 moves a different length in the left and right directions relative to the wire holder 34 for the electric fence of the fourth embodiment during this movement of the wire 2, the pulley 12 rotates, so that the wire holder 34 for the electric fence of the fourth embodiment can correct this bias in the pulling force. When the animal comes off the wire 2 and the wire 2 is no longer pulled, the compression coil spring 43 returns to its original state and pulls the wire holder 47 through the second spring member 42, so that the wire holder 34 for the electric fence of the fourth embodiment returns to the state shown in Fig. 12(a).

[0055] Next, a wire holder 35 for an electric fence according to a modified example of the fourth embodiment of the present invention will be described. FIG. 13(a) shows the wire holder 46 of the wire holder 33 for an electric fence according to the third embodiment of the present invention shown in FIGS. 9(d) to (f) and a wire holder 48 according to a modified example of the fourth embodiment, which uses a pulley 12 attached to a rod 46L of the wire holder 46. The wire holder 46 of the third embodiment is curved so that a folded portion 46T of a V-shaped base 46A in a side view is engaged with a folded portion 42T of a second spring member 42, and a through hole 46H and a screw hole 46N are provided at both ends of the base 46A. A rod 46L having a screw groove 46M at its tip is inserted into the through hole 46H and then screwed into the screw hole 46N to close the wire holder 46. The wire 2 is hooked and held by the rod 46L. On the other hand, in the modified example of the fourth embodiment, the wire holder 48 is formed by inserting the pulley 12 through the rod 46L inserted through the through hole 46H, and then screwing the thread groove 46M into the threaded hole 46N.

[0056] 13(b) shows a wire holder 48 of a modification of the fourth embodiment. In the wire holder 48 of the modification of the fourth embodiment, a gap is provided between the pulley 12 rotatably held by the rod 46L by rotating the rod 46L and the base 46A of the wire holder 48, and the wire 2 can be inserted into the wire holder 48 from this gap, allowing the pulley 12 to hold the wire 2. Therefore, in the wire holder 48 of the modification of the fourth embodiment, even when the wire 2 moves slightly left or right, the pulley 12 rotates, allowing the wire 2 to move smoothly.

[0057] Fig. 14(a) shows a state in which the wire 2 is held by the wire holder 35 for an electric fence of a modified example of the fourth embodiment of the present invention incorporating the wire holder 48 shown in Fig. 13(b). The wire holder 35 for an electric fence of the modified example of the fourth embodiment uses the first spring member 41 and the second spring member 42 shown in Figs. 9(a) and (b). Since the wire 2 is stretched with a tension of 50 to 150 kgf per wire, the wire holder 48 holding the wire 2 is biased by the wire 2 in a direction away from the compression coil spring 43. Therefore, the second spring member 42 to which the wire holder 48 is attached is also pulled by the wire 2 via the wire holder 48, and compresses the compression coil spring 43 by the hook portion 42H. The compression force applied to the compression coil spring 43 is received by the hook portion 41H of the first spring member 41, so that the tension of the wire 2 is received by the polyvinyl chloride pipe 40 through the wire holder 48, the second spring member 42, the compression coil spring 43 and the first spring member 41.

[0058] In this state, when the wire 2 is pulled by an animal, the compression coil spring 43 is compressed through the wire holder 48 and the second spring member 42 as shown in Fig. 14(b), and the wire holder 48 moves in a direction away from the polyvinyl chloride pipe 40, so that the wire 2 can be moved. When the wire 2 moves, the wire holder 35 for an electric fence of the modified fourth embodiment can correct the bias in the pulling force because the pulley 12 rotates, even if the wire 2 moves a different length in the left and right directions relative to the wire holder 35 for an electric fence of the modified fourth embodiment. When the animal comes off the wire 2 and the wire 2 is no longer pulled, the compression coil spring 43 returns to its original state and pulls the wire holder 48 through the second spring member 42, so that the wire holder 35 for an electric fence of the modified fourth embodiment returns to the state shown in Fig. 14(a).

[0059] 15A to 15C illustrate a fifth embodiment of the present invention in which a compression coil spring 43 of a wire holder for an electric fence is covered with a spring cover 60 (called a housing), and FIG. 15A shows one embodiment of the spring cover 60 attached to the compression coil spring 43. The compression coil spring 43 is covered with the spring cover 60 in order to maintain the positional relationship between the first spring member 41 and the second spring member 42 inserted inside the compression coil spring 43 and to improve the aesthetic appearance of the outside of the wire holder 31. In the wire holder 31 for an electric fence of the first embodiment of the present invention described with reference to FIGS. 3 to 7, the spring wire is bent at both ends of the loop portion 41L so that the parallel portion 41P of the first spring member 41 is parallel to the ground in a direction perpendicular to the ground, and the parallel portion 42P of the second spring member 42 is inserted into the compression coil spring 43 so as to be parallel to the ground. In this case, at the end of the compression coil spring 43, the two spring wires of the hook portion 41H of the first spring member 41 are aligned vertically with respect to the ground, and the two spring wires of the hook portion 42H of the second spring member 42 are aligned horizontally with respect to the ground.

[0060] However, there is a risk that the hook portion 41H of the first spring member 41 held at one end of the compression coil spring 43 of the wire holder 31 and the hook portion 42H of the second spring member 42 held at the other end may move during operation of the wire holder 31. If the positions at which the hook portion 41H of the first spring member 41 and the hook portion 42H of the second spring member 42 are held by the compression coil spring 43 move, the parallel portion 41P of the first spring member 41 and the parallel portion 42P of the second spring member 42 may interfere with each other, preventing smooth operation of the wire holder 31. In addition, if the compression coil spring 43 is exposed in the wire holder 31, the aesthetic appearance of the wire holder 31 may be impaired. For this reason, in the fifth embodiment of the present invention, in order to maintain the positional relationship between the first spring member 41 and the second spring member 42 inserted inside the compression coil spring 43 and to improve the aesthetic appearance of the wire holder 31, a spring cover 60 is placed over the compression coil spring 43.

[0061] The spring cover 60 shown in FIG. 15(a) can be made of synthetic resin. The spring cover 60 has a storage section that stores the compression coil spring 43, the parallel part 41P, and the parallel part 42P, and has a length equal to or greater than the overall length of the compression coil spring 43 and an inner diameter that allows the compression coil spring 43 to smoothly contract or expand inside. In addition, at both ends of the spring cover 60, a bulging part 61 is formed whose outer wall bulges slightly, and a pair of locking grooves 62 (called recesses) for locking the hook part 41H of the first spring member 41 are provided at opposing positions on the outer edge of the free end (called the second end) of one of the bulging parts 61. The bulging part 61 also serves to reinforce the locking groove 62. The groove width of the locking groove 62 may be a circular groove having a diameter of the spring wire in the hook part 41H of the first spring member 41, as shown in FIG. 15(b). 15(c), the width of the entrance of the locking groove 62 may be increased to make it easier for the hook portion 41H of the first spring member 41 to enter the locking groove 62. Furthermore, as shown in Fig. 15(d), the width of the entrance of the locking groove 61 may be increased, but a stopper 62S shorter than the diameter of the spring wire may be formed in the middle of the locking groove 61, and when the hook portion 41H is inserted, the distance between the stoppers 62S in opposing positions may be increased to make it difficult for the hook portion 41H inserted into the locking groove 61 to come out.

[0062] At the other end (called the first end) of the spring cover 60 from which the loop portion 41L protrudes, a pair of guide grooves 63 (called slits) are provided at opposing positions, extending in a straight line from the other end of the spring cover 60 to the free end of the bulging portion 61 provided with the locking groove 62, which guides the movement of the hook portion 42H of the second spring member 42 that moves while compressing the compression coil spring 43. The length of the guide groove 63 from the free end of the bulging portion 61 is equal to or greater than the movement distance of the hook portion 42H of the second spring member 42, and the width of the guide groove 63 is such that the hook portion 42H of the second spring member 42 can move smoothly. Therefore, the guide groove 63 is provided not only in the bulging portion 61 but also in the main body 60A of the spring cover 60. The guide groove 63 is formed in the spring cover 60 so that the line connecting the same places of the guide grooves 63 at opposing positions is in a twisted position with respect to the line connecting the same places of the locking grooves 62 at the aforementioned opposing positions, and is horizontal to the ground. The position of the guide groove 63 at the end where the loop portion 41L of the spring cover 60 protrudes is shifted by 90 degrees from the position at the free end of the bulge portion 61 where the locking groove 62 is provided. Also, since the hook portion 42H of the second spring member 42 is not locked to the spring cover 60, it is not necessary to provide the bulge portion 61 on the main body 60A of the spring cover 60 on the side where the guide groove 63 is provided, but in this embodiment, the bulge portion 61 is provided for aesthetic reasons of the spring cover 60.

[0063] FIG. 16 shows a state where the spring cover 60 shown in FIG. 15(a) is attached to the compression coil spring 43 of the wire holder 31 shown in FIG. 5(a). Since the wire 2 is tensioned with a tension of 50 to 150 kgf per wire, the wire holder 44 holding the wire 2 is urged by the wire 2 in a direction away from the compression coil spring 43. Therefore, the second spring member 42 to which the wire holder 44 is attached is also pulled by the wire 2 via the wire holder 44, so that the compression coil spring 43 is compressed by the hook portion 42H, and the hook portion 42H is located in the guide groove 63 of the spring cover 60. In this state, when the wire 2 is pulled by the animal, the hook portion 42H moves in the guide groove 63 and compresses the compression coil spring 43, although not shown in the figure. At this time, the compression coil spring 43 is compressed in the spring cover 60, so that it contracts while maintaining its cylindrical shape without distortion. Then, when the animal comes off the wire 2 and the wire 2 is no longer pulled, the compression coil spring 43 returns to its original state within the spring cover 60, the hook portion 42H moves within the guide groove 63 of the spring cover 60, and the wire holder 31 for the electric fence returns to the state shown in Figure 16.

[0064] Figure 17 illustrates a modified version of the fifth embodiment of the present invention in which a compression coil spring of a wire holder for an electric fence is covered with a spring cover 60' of another shape, and (a) shows the shape of the modified spring cover 60'. Also, Figure 17(b) shows the spring cover 60' shown in Figure 17(a) as viewed from the direction of arrow B. The spring cover 60' of this embodiment can also be made of synthetic resin. The spring cover 60' has a total length that is equal to or longer than the total length of the compression coil spring 43, just like the spring cover 60 shown in Figure 15(a).

[0065] 16, bulges 61 are formed at both ends of a spring cover 60, and a locking groove 62 is provided at the free end of one of the bulges 61 to lock the hook portion 41H of the first spring member 41, and a guide groove 63 is provided at the other end to guide the movement of the hook portion 42H of the second spring member 42. When the spring cover 60 of the fifth embodiment is used, the compression coil spring is hidden by the spring cover 60, improving the aesthetic appearance of the wire holder for the electric fence, but the hook portion 41H of the first spring member 41 and the hook portion 42H of the second spring member 42 can be seen from the outside.

[0066] 17, the hook portion 41H of the first spring member 41 is fixed to one end of the spring cover 60', the hook portion 42H of the second spring member 42 is slidably guided, and both are made invisible from the outside, further improving the aesthetic appearance of the wire holder 31. Specifically, the modified example of the fifth embodiment is the same in that bulges 61 are formed at both ends of the spring cover 60', a locking groove 62 is provided at the free end of one of the bulges 61 to lock the hook portion 41H of the first spring member 41, and a guide groove 63 is provided at the other end to guide the movement of the hook portion 42H of the second spring member 42. Meanwhile, in the modified version of the fifth embodiment, a blind cover 64 for covering the hook portion 41H of the first spring member 41 engaged in the locking groove 62, and a blind cover 65 for covering the hook portion 42H of the second spring member 42 without interfering with its movement are provided on the outside of the locking groove 62 and the guide groove 63. The heights of the blind cover 64 and the blind cover 65 may be formed according to the sizes of the hook portions 41H, 42H. This form of spring cover 60' further improves the aesthetic appearance of the wire holder for the electric fence.

[0067] The present invention has been described above based on several embodiments, but because a plurality of electric fence wire holders of the present invention are used on one post, a post equipped with an electric fence wire holder of the present invention can achieve substantially reduced costs while providing the same operation and function as the posts disclosed in Patent Documents 1 and 2. The electric fence wire holder according to the present disclosure may be in the following form. (1) A wire holder for an electric fence that is attached directly to a rigid post that is erected vertically on the ground, or to at least one pipe that is rotatably inserted through the post, and holds a wire, The spring includes a first spring member, a second spring member, and a coil spring, which are formed from a spring wire, and a wire holder attached to a folded portion of the second spring member to hold the wire, The first spring member includes a loop portion that can be crimped to the outer peripheral surface of the support or the pipe, a parallel portion that extends in the same direction from both ends of the loop portion and passes through the inside of the coil spring, and a hook portion that is folded back to the outside at the tip of the parallel portion after the coil spring is passed through and is engaged with the end of the coil spring, the second spring member includes a folded portion, a parallel portion adjacent to the folded portion, and a hook portion folded outward at a tip of the parallel portion, the hook portion being engaged with an end of the coil spring after the coil spring is inserted through the parallel portion; The coil spring has an overall length shorter than the lengths of the parallel portions of the first and second spring members, A wire holder for an electric fence, the wire holder having a loop portion and the loop portion having an opening and closing portion for allowing the wire to be inserted and removed from the loop portion. (2) The wire holder for an electric fence according to claim (1), wherein the spring wire of the loop portion is wound around the post or pipe at least two times. (3) A wire holder for an electric fence as described in embodiment (1) or (2), wherein the two spring wires in the parallel portion of the first spring member are aligned perpendicular to the ground, and the two spring wires in the parallel portion of the second spring member are aligned parallel to the ground. (4) A wire holder for an electric fence as described in embodiment (1) or (2), in which the two spring wires in the parallel portion of the first spring member are arranged parallel to the ground, and the two spring wires in the parallel portion of the second spring member are arranged perpendicular to the ground. (5) A wire holder for an electric fence as described in (3) above, in which the wire holder is made of synthetic resin having a predetermined thickness, and a through hole penetrating through the thickness direction is formed in part of the body, and the wire holder is folded back and attached via the through hole before the second spring member is inserted into the coil spring. (6) The wire holder is made of metal and has a U-shape with a curved portion, one of the two free ends has a through hole and the other has a screw hole, a metal rod having a screw groove at its tip is inserted into the through hole and then screwed into the screw hole to form a ring-shaped portion, the screw groove of the rod is released from the screw hole to form an opening and closing portion, and the rod is perpendicular to the ground when the curved portion is attached to the folded-back portion of the second spring member. (7) The wire holder has a V-shaped base when viewed from the side, and the folded portion of the base is a curved portion that engages with the folded portion of the second spring member when viewed from the front, one of the two free ends of the base is formed with a through hole and the other with a screw hole, a metal rod having a screw groove at its tip is inserted into the through hole and then screwed into the screw hole to form a ring-shaped portion, the screw groove of the rod is released from the screw hole to form an opening and closing portion, and the rod is perpendicular to the ground when the curved portion is attached to the folded portion of the second spring member. (8) A wire holder for an electric fence as described in (6) or (7) in which a pulley is attached to the rod of the wire holder and rotates around the rod as an axis of rotation, and the wire inserted into the annular portion is held by the pulley. (9) A wire holder for an electric fence as described in any of embodiments (1) to (8), further comprising a body having an internal space capable of accommodating the compression coil spring of the wire holder, and a cover having an opposing groove at one end of the body for engaging the hook portion of the first spring member, and an opposing slit at the other end for guiding movement of the hook portion of the second spring member. (10) The wire holder for an electric fence according to embodiment (9), wherein a straight line passing through the same location of two opposing grooves and a straight line passing through the same location of two opposing slits are in a twisted position. (11) A wire holder for an electric fence as described in aspect (10), in which a privacy cover is provided on the outside of the groove for covering and concealing the hook portion of the first spring member engaged in the groove, and a privacy cover is provided on the outside of the slit for covering and concealing the hook portion of the second spring member moving within the slit. (12) A post having a wire holder for an electric fence, the wire holder being attached directly to a rigid support vertically set up against the ground, or to at least one pipe having a predetermined length rotatably inserted through the support, A post, wherein the wire holder for an electric fence is the wire holder for an electric fence according to any one of aspects (1) to (10). (13) A post equipped with a wire holder for an electric fence according to embodiment (12), wherein the post is a corner post capable of changing the wire tensioning direction of each wire tensioning stage. (14) A post equipped with a wire holder for an electric fence according to embodiment (13), wherein the post is an intermediate post that is installed in the ground in the area between two corner posts that are installed at the corners where the direction of the wire tension is changed, and that holds the wire. [Explanation of symbols]

[0068] 7 pillars 11, 12 Pulleys 31, 32, 33, 34, 35 Wire holder 40 PVC pipe 41 First spring member 42 Second spring member 43 Compression coil spring 44, 45, 46, 47, 48, 51, 52, 53 Wire holder

Claims

1. A coil spring and a first substrate including: a loop portion having an opening formed therein through which a cylindrical member can pass; a pair of first parallel portions extending from the loop portion so as to pass through the inside of the coil spring and having tips protruding from one end of the coil spring; and a pair of first hook portions disposed at the tips of the pair of first parallel portions and engaging with the other end of the coil spring when one end of the coil spring is compressed from the loop portion side to receive a load from the coil spring; a second substrate including: a support portion disposed opposite the loop portion of the coil spring; a pair of second parallel portions extending from the support portion so as to pass through the inside of the coil spring and having tips protruding from one end of the coil spring; and a pair of second hook portions disposed at tips of the pair of second parallel portions and compressing one end of the coil spring when the support portion moves in a direction away from the loop portion; a wire holder supported by the support portion and holding a wire; 1. A wire holder for an electric fence, comprising:

2. 2. The wire holder for an electric fence according to claim 1, wherein the loop portion has a spiral shape with at least two turns.

3. 3. The wire holder for an electric fence according to claim 1, wherein the pair of first hook portions are arranged side by side in a direction perpendicular to the direction in which the opening passes through.

4. 3. The wire holder for an electric fence according to claim 1, wherein the pair of first hook portions are arranged side by side in a direction parallel to the direction in which the opening passes through.

5. a first end portion from which the loop portion projects; a second end portion facing the first end portion and from which the support portion projects; an accommodation portion disposed between the first end portion and the second end portion and configured to accommodate the coil spring, the first parallel portion, and the second parallel portion; 3. The wire holder for an electric fence as claimed in claim 1 or 2, further comprising a housing extending in a straight line from the first end to the second end, the housing having a pair of slits formed therein through which the pair of second hook portions can move when the coil spring is compressed from the loop portion side, and the housing having a pair of recesses formed on an outer edge of the second end to receive the pair of first hook portions.

6. 6. The wire holder for an electric fence according to claim 5, wherein the positions of the pair of slits at the first end are shifted by 90 degrees from the positions of the pair of recesses at the second end.

7. 4. The wire holder for an electric fence according to claim 3, wherein the wire holder is made of synthetic resin and has a through hole formed therein that allows the support part to pass through and be attached to the second base material.

8. the wire holder is made of metal; The wire holder is a U-shaped base portion having a curved portion; a first free end having a through hole formed at an end of the base; a second free end having a screw hole formed at an end of the base different from the first free end; 4. The wire holder for an electric fence according to claim 3, further comprising: a rod having a threaded tip which is inserted into the through hole and then threaded into the screw hole.

9. the wire holder is made of metal; The wire holder is The folded portion has a curved base portion that is V-shaped in a side view and engages with the folded portion of the second base material in a front view; a first free end having a through hole formed at an end of the base; a second free end having a screw hole formed at an end of the base different from the first free end; 5. The wire holder for an electric fence according to claim 4, further comprising: a metal rod having a threaded tip which is inserted into the through hole and then screwed into the screw hole.

10. 9. The wire holder for an electric fence according to claim 8, wherein the wire holder comprises: a pulley that holds the wire, which rotates around the rod as a rotation axis.

11. 3. A post comprising a wire holder for an electric fence, wherein the wire holder is a wire holder for an electric fence according to claim 1 or 2.

12. 12. A post comprising the wire holder for an electric fence according to claim 11, wherein the post is capable of changing the direction in which the wire is tensioned in each stage of the wire tensioning.

13. 13. The post comprising the wire holder for an electric fence according to claim 12, wherein the post is installed in the ground in an area between two corner posts installed at corners where the tensioning direction of the wire changes.

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