Snake climbing prevention tool

Abstract

To provide a snake climbing prevention tool that does not hinder workers climbing utility poles using scaffolding bolts.SOLUTION: A snake climbing prevention tool 1a according to the present invention includes a cylindrical first main body 4 having a first slit 4a formed in the axial direction, a metal mounting member 2 made of a plate material having a circular ring shape in a plan view and a first connecting portion 5 fixed to a side surface 4b of the first main body 4, and six first metal plates 3 each having a shape obtained by dividing the ring into six equal parts in the circumferential direction in a plan view and detachably connected to the mounting member 2. The first connecting portion 5 has a truncated cone shape that extends laterally from the side surface 4b in an umbrella-like manner while being inclined with respect to the axial direction of the first main body 4. The first connecting portion 5 has twelve through holes 6 formed so as to be engageable with rod-shaped fasteners 7 provided in the first metal plates 3, and the second slits 5a are arranged so as to form the same straight line as the first slits 4a when viewed in the axial direction of the first main body 4.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a snake climbing prevention device that is installed on utility poles to prevent electric wire ground faults and electric shock accidents caused by snakes climbing the poles, and in particular to a snake climbing prevention device that does not hinder workers climbing utility poles using scaffolding bolts for the purpose of working at heights, etc. [Background technology]

[0002] If a snake climbs a utility pole and comes into contact with the wires or surrounding metal fittings, causing a ground fault or electrocution, workers must go to the site to deal with the accident. However, in mountainous areas, it is difficult to travel to the site, so dealing with the accident takes a great deal of time and money. To address this issue, for example, Patent Document 1 discloses an invention entitled "Device for preventing small animals from climbing poles" that relates to a device for preventing small animals such as snakes from climbing poles. Using the symbols shown in the drawings of Patent Document 1, Patent Document 1 describes a small animal pole climbing prevention device 1 that is inverted bowl-shaped and has a mounting hole 2a in the center, and is attached to the utility pole P with the utility pole P inserted into this mounting hole 2a and fixed to the utility pole P using a utility pole band B, and is equipped with a cap part 2 consisting of a first cap part 21 and a second cap part 22, a wall part 3 that extends downward from the lower end of the cap part 2 and covers the periphery of the utility pole P, and an opening / closing mechanism 5 that opens the wall part 3 cylindrically when no external force is applied and closes the wall part 3 when a snake S comes into contact with it and an external force is applied. With this structure, if a small animal climbs up the pole and comes into contact with the opening and closing mechanism, the wall closes, which is expected to startle the small animal and cause it to retreat. Also, the inverted bowl-shaped cap prevents the small animal from climbing further up inside the wall.

[0003] Furthermore, Patent Document 2 discloses an invention entitled "Bird and Animal Protection Mounting Equipment" that relates to a device that protects electrical equipment from damage caused by birds and small animals. Using the symbols shown in the drawings of Patent Document 2, Patent Document 2 describes a bird and animal protection mounting device 100 which comprises a bird repellent section 110 which consists of a fastening fitting 111 and a cover member 112 having a slit 130a and which covers arm 501 and electric wires 502 attached to a utility pole 503 from above in the vertical direction, an object contact prevention section 120 which is attached to bird repellent section 110 and protrudes upward in the vertical direction from bird repellent section 110, and a snake intrusion prevention section 130 which is attached vertically below arm 501 and electric wires 502, has a ring shape, and has an inclined surface 131 which is inclined relative to the axial direction of utility pole 503. With this structure, since the snake intrusion prevention section 130 is a cylindrical member in the shape of a truncated cone, even if a small animal such as a snake climbs up the pole from the underside of the snake intrusion prevention section 130, the inner wall surface (reverse slope) of the snake intrusion prevention section 130 functions as a rat trap, preventing the small animal from climbing up the pole any further.

[0004] Furthermore, Patent Document 3 discloses an invention entitled "Device for preventing snakes from climbing utility poles, trees, steel towers, etc." that relates to a device for preventing snakes from climbing utility poles, etc. Using the symbols shown in the drawings of Patent Document 3, Patent Document 3 describes a snake climbing prevention device that includes a binding ring 1 that is wrapped around and fixed to the surface of a utility pole or the like, a trapping net 2 that is connected at its upper end to the binding ring 1 and uses its stitches to trap snakes that pass through it, and an expansion ring 3 that moves the lower edge of the trapping net 2 away from the surface of the utility pole or the like and expands the lower end of the trapping net 2. With this structure, a snake climbing a utility pole or the like becomes unable to move when it passes through the trapping net 2, so that the snake can be reliably captured.

[0005] Patent Document 4 discloses a device called a "device to prevent snakes from climbing up the guy wires of utility poles" that is designed to prevent snakes from climbing up the guy wires of utility poles and disrupting power transmission. Using the symbols shown in the drawings in Patent Document 4, Patent Document 4 describes a snake climbing prevention device for a guy line, which includes: a circular pipe 3 wrapped around tapes 2 wound around a guy line 1 of a utility pole and fixed with screws 4; a U-shaped frame 5 attached circularly to the circular pipe 3; a ball 6 embedded inside the U-shaped frame 5 so that it can rotate freely around its base and so that a portion of it is slightly exposed; a circular plate 7 installed in contact with the ball 6 and so that it can rotate freely; an attachment plate 8 attached to the outside of the U-shaped frame 5 by slightly bending the upper end of the U-shaped frame 5 to prevent the circular plate 7 from escaping; and a fan 9 attached to the centre of the circular plate 7 that can rotate relative to the attachment plate 8. With this structure, when the fan 9 rotates due to the wind, a snake climbing up the support wire cannot move above the fan 9. Also, even when there is no wind and the fan 9 is not rotating, if a snake tries to climb the fan 9, the weight of the snake will rotate the fan 9, which is expected to cause the snake to fall. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2018-174801 [Patent Document 2] Japanese Patent Application Publication No. 2018-35582 [Patent Document 3] Japanese Patent Application Publication No. 8-308462 [Patent Document 4] Japanese Utility Model Application Publication No. 52-166332 Summary of the Invention [Problem to be solved by the invention]

[0007] The inventions disclosed in Patent Documents 1 to 3 have a problem in that they are not designed to be partially removable or deformable, which can cause obstacles to workers climbing up the column. Also, the device disclosed in Patent Document 4 has a structure in which the fan 9 rotates, but even if the fan 9 rotates, its installation location does not change, so the fan 9 still becomes an obstacle to workers climbing up the column.

[0008] The present invention has been made in response to such conventional circumstances, and aims to provide a snake climbing prevention device that does not impede workers climbing utility poles using scaffolding bolts. [Means for solving the problem]

[0009] In order to achieve the above object, the first invention is a snake climbing prevention device that is installed on a utility pole for the purpose of preventing snakes from climbing, and is characterized in that it comprises a first cylindrical elastic main body portion with a first slit in the axial direction, a plate-shaped first connecting portion fixed to the side of the first main body portion, and a plurality of first metal plates that are detachably or swingably connected to the first connecting portion so as to protrude laterally from the side of the first main body portion in a canopy-like manner, and that the first connecting portion has a second slit that is arranged in the same straight line as the first slit when viewed in the axial direction of the first main body portion.

[0010] In the first invention, the first slit in the first main body and the second slit in the first connecting portion are connected, and because the first main body is elastic, the first main body can be deformed to open the first and second slits, allowing the utility pole to be placed inside the first main body through the first and second slits. When the first main body is attached to the utility pole with the cap-shaped first connecting portion facing downward, the first metal plate prevents the snake from climbing the pole. Furthermore, in the first invention, when the first metal plate is removed from the first connecting portion, it does not become an obstacle to workers climbing the utility pole. Furthermore, the first metal plate can be easily replaced by removing it from the first connecting portion, and because it is not made of plastic, it is less susceptible to deterioration.

[0011] The second invention is characterized in that, in the first invention, it is provided with a locking means for detachably connecting the first metal plate to the first connecting portion, the first connecting portion has a circular ring shape when viewed in a plane, and the first metal plate has a shape in which the ring is divided circumferentially when viewed in a plane. In the second invention, in addition to the effect of the first invention, the snake is prevented from climbing the pole over the entire circumferential range of the utility pole by the multiple first metal plates attached to the first connecting portion so as to form a ring shape in a plan view.

[0012] The third invention is characterized in that, in the second invention, the locking means is composed of a daruma-shaped through hole provided in the first connecting portion and having a large diameter portion and a small diameter portion, and a rod-shaped locking device erected on the upper surface of the first metal plate, and the locking device comprises a shaft portion whose base end is fixed to the upper surface of the first metal plate and can be inserted into the small diameter portion, and a head portion provided at the tip of the shaft portion and can be inserted only into the large diameter portion. In the third invention, in addition to the effect of the second invention, the first metal plate is detachably connected to the first connecting portion with a simple structure.

[0013] The fourth invention is characterized in that, in the first invention, it comprises a first oscillation suppression device fixed to at least one of the first connecting portion and the first main body portion so as to be able to abut against the upper surface of the first metal plate, and an oscillation suppression member installed below the first metal plate so as to be able to move in the axial direction of the first main body portion, wherein the first connecting portion forms a regular polygon in a plan view, and the first metal plate is oscillatably connected to each side of the regular polygon via a first hinge axis relative to the first connecting portion, and the oscillation suppression member is provided with a second oscillation suppression device that abuts directly or indirectly against the underside of the first metal plate to suppress oscillation of the first metal plate. In the fourth aspect of the present invention, the term "first connecting portion forming a regular polygon in plan view" also includes "first connecting portion forming a substantially regular polygon in plan view."

[0014] In the fourth invention, in addition to the effects of the first invention, the first swing suppressing device prevents the first metal plate from swinging upward, and the second swing suppressing device prevents the first metal plate from swinging downward. Furthermore, when the swing suppressing member is moved downward so that the second swing suppressing device does not abut the underside of the first metal plate, the first metal plate becomes swingable downward. Furthermore, when the first metal plate is swung downward, the first metal plate does not pose an obstacle to workers climbing the utility pole. Since the first metal plate is connected to the first connecting portion, the fourth invention, unlike the second invention, does not require workers to hold the first metal plate after removing it from the first connecting portion.

[0015] The fifth invention is characterized in that, in the fourth invention, the vibration suppression member consists of a cylindrical body with a slit in the axial direction, and a second vibration suppression tool is installed on the side near the end. The fifth invention has the effect of the fourth invention, plus the effect that the sway suppressing member is installed on the utility pole in a state where it can move in the axial direction of the first main body by deforming the cylinder to open the slit and placing the utility pole inside the cylinder through the slit. Also, the fifth invention has the effect that the sway suppressing member installed on the utility pole so as to be able to move in the axial direction of the first main body can be realized with a simple structure.

[0016] The sixth invention is the fourth or fifth invention, characterized in that it comprises a cylindrical second main body portion which is elastic and has a third slit in the axial direction and is installed below the first metal plate, a second connecting portion made of a plate material which forms the same regular polygon as the first connecting portion when viewed in a plane and is fixed to the end side of the second main body portion, and a plurality of second metal plates connected to the second connecting portion so as to extend laterally in a cap-like shape from the end side of the second main body portion, wherein a fourth slit is provided in the second connecting portion so as to form the same straight line as the third slit when viewed in the axial direction of the second main body portion, the second metal plates are swingably connected to each side of the regular polygon via a second hinge axis relative to the second connecting portion, and the swing suppression member is installed below the second metal plate so that the second swing suppression device abuts against the underside of the first metal plate via the second metal plate to suppress swing of the first metal plate and the second metal plate. In the sixth aspect of the present invention, the term "second connecting portion forming a regular polygon in plan view" also includes "second connecting portion forming a substantially regular polygon in plan view."

[0017] In the fourth invention, unlike the second invention, it is difficult to arrange the multiple first metal plates connected to the first connecting portion so that they form a ring shape in a plan view. Therefore, in the fourth invention, in order to prevent snakes from passing between two adjacent first metal plates, it is necessary to increase the number of first metal plates and narrow the gap between the two first metal plates. In contrast, in the sixth invention, in addition to the effects of the fourth or fifth invention, the second main body is installed on the utility pole so that the second metal plate is positioned between two adjacent first metal plates when viewed in the axial direction of the first main body, thereby preventing snakes from passing between the two adjacent first metal plates by the second metal plate. [Effects of the Invention]

[0018] The first invention allows installation work on a utility pole to be completed efficiently in a short time. Also, according to the first invention, the first metal plate does not hinder the worker when climbing the pole, so the worker can climb the pole safely in a short time and perform high-altitude work efficiently. Also, the first invention makes it difficult for the first metal plate to deteriorate, so it can be used for a long time. Furthermore, the first invention makes it easy to replace the first metal plate, so it saves time and money required for maintenance.

[0019] According to the second invention, in addition to the effect of the first invention, there is an effect that snakes can be reliably prevented from climbing up the pillar.

[0020] According to the third invention, the configuration in which the first metal plate is detachably connected to the first connecting portion is realized with a simple structure, which achieves the effect of low manufacturing costs in addition to the effect of the second invention.

[0021] In the fourth invention, when the first metal plate is swung downward, it does not become an obstacle when the worker ascends the pole. Unlike the second invention, the worker does not need to hold the first metal plate detached from the first connecting part. Therefore, according to the fourth invention, the effect of the first invention, that the worker can ascend the pole safely in a short time and perform work at height efficiently, is further achieved.

[0022] According to the fifth invention, the rocking suppressing member is installed on the utility pole so as to be movable in the axial direction of the first main body portion with a simple structure, which not only achieves the effect of the fourth invention but also has the effect of being able to manufacture the rocking suppressing member at low cost. Also, with the fifth invention, the rocking suppressing member can be installed on the utility pole easily, so that the installation work can be done efficiently in a short time.

[0023] In the sixth invention, there is no need to increase the number of first metal plates, but the second metal plates only need to be disposed between two adjacent first metal plates when viewed in the axial direction of the first main body, so the number of second metal plates can be the same as the number of first metal plates. This simplifies the structure between the first main body and the first metal plates, and between the second main body and the second metal plates, so the sixth invention has the effect of reducing manufacturing costs in addition to the effects of the fourth or fifth invention. [Brief explanation of the drawings]

[0024] [Figure 1] 1A and 1B are a perspective view and a plan view, respectively, showing the appearance of Example 1 of a snake climbing prevention device according to an embodiment of the present invention. [Figure 2] 1(a) is a perspective view of the mounting member shown in FIG. 1(a), and (b) and (c) are a plan view and a side view, respectively, of the first metal plate shown in FIG. 1(a). [Figure 3] (a) is a diagram showing the snake climbing prevention device shown in Figure 1(a) attached to a utility pole, (b) is a diagram showing the snake climbing prevention device in Figure 1(a) with the first metal plate removed, and (c) is a diagram showing a modified version of the snake climbing prevention device shown in Figure 1(a) attached to a utility pole. [Figure 4] 1(a) and 1(b) are a perspective view and a plan view, respectively, showing the appearance of Example 2 of a snake climbing prevention device according to an embodiment of the present invention. [Figure 5] 4(a) to 4(c) are perspective views of the first shade member, the second shade member, and the swing suppressing member shown in FIG. 4(a), respectively. [Figure 6] (a) is a cross-sectional view showing the second cap member and the sway suppression member attached to the utility pole, and (b) is a view showing the second cap member in (a) in a closed state. [Figure 7] (a) is a diagram showing the snake climbing prevention device shown in Figure 4(a) attached to a utility pole, and (b) is a diagram showing the state in which the first and second cap members in Figure 4(a) are closed. DETAILED DESCRIPTION OF THE INVENTION

[0025] A snake climbing prevention device according to an embodiment of the present invention will be described with reference to Figures 1 to 7. In the following description, expressions such as "top surface," "bottom surface," "above," and "below" are used, assuming that the snake climbing prevention device is actually attached to a utility pole, as will be described later with reference to Figure 3. [Example]

[0026] Fig. 1(a) and Fig. 1(b) are a perspective view and a plan view, respectively, showing the appearance of a snake climbing prevention device 1a according to an embodiment of the present invention. Fig. 2(a) is a perspective view of a mounting member 2 constituting the snake climbing prevention device 1a, and Fig. 2(b) and Fig. 2(c) are a plan view and a side view, respectively, of a first metal plate 3 constituting the snake climbing prevention device 1a. Fig. 3(a) shows the snake climbing prevention device 1a attached to a utility pole P, Fig. 3(b) shows the snake climbing prevention device 1a in Fig. 3(a) with the first metal plate 3 removed, and Fig. 3(c) shows a snake climbing prevention device 1b, a modified version of the snake climbing prevention device 1a, attached to a utility pole P. 1(a) and 1(b) respectively show the open and closed states of the first slit 4a and the second slit 5a of the mounting member 2. To avoid cluttering the figures, Figs. 1(a), 1(b) and 2(a) show one reference numeral each for the through hole 6 of the first connecting portion 5 and the locking device 7 of the first metal plate 3, while Figs. 3(a) to 3(c) omit the reference numerals for the through hole 6 and the locking device 7.

[0027] As shown in Figures 1 and 2, the snake climbing prevention device 1a of the present invention is installed on a utility pole P (see Figure 3(a)) for the purpose of preventing snakes from climbing, and is equipped with an elastic metal mounting member 2 and six first metal plates 3 which, when viewed in a plane, have the shape of a ring divided into six equal parts circumferentially and are detachably connected to the mounting member 2. The mounting member 2 has a cylindrical first main body portion 4 having a first slit 4a formed in the axial direction, and a first connecting portion 5 made of a plate material having a circular ring shape in a plan view and fixed to a side surface 4b of the first main body portion 4. The first connecting portion 5 has a truncated cone shape that extends laterally from the side surface 4b in an umbrella-like manner at an angle relative to the axial direction of the first main body portion 4. The first connecting portion 5 has twelve through holes 6 formed so that they can be engaged with rod-shaped engaging devices 7 provided on the first metal plate 3, and when viewed in the axial direction of the first main body portion 4 as shown in Figure 1(b), the second slit 5a is arranged to form a straight line with the first slit 4a.

[0028] The mounting member 2 can be deformed so that the distance between the first slit 4a of the first main body portion 4 and the second slit 5a of the first connecting portion 5 becomes wider, and when the mounting member 2 is deformed so that the distance between the first slit 4a and the second slit 5a becomes wider than the outer diameter of the utility pole P (see Figure 3(a)), the utility pole P can be placed inside the mounting member 2 through the first slit 4a and the second slit 5a.

[0029] As shown in Fig. 2(a), when the through hole 6 of the first connecting part 5 is viewed in plan, its outline is a potbellied shape formed by a large diameter part 6a and a small diameter part 6b. Furthermore, as shown in Fig. 2(b) and Fig. 2(c), when the first metal plate 3 is viewed in plan, its outline is a shape in which both ends of a first arc 3a and a second arc 3b, which has a larger radius of curvature than the first arc 3a, are connected by a straight line 3c. A pair of fasteners 7, 7 is provided on an upper surface 3d of the first metal plate 3 near the first arc 3a. The pair of fasteners 7, 7 includes a cylindrical shaft 7a and a spherical head 7b, which is provided at one end of the shaft 7a and has a diameter larger than that of the shaft 7a.

[0030] The through-hole 6 of the first connecting part 5 is formed so that the inner diameter of the large diameter part 6a is larger than the diameter of the head part 7b of the locking device 7, and the inner diameter of the small diameter part 6b is larger than the diameter of the shaft part 7a of the locking device 7 but smaller than the diameter of the head part 7b. In addition, the distance between the connecting part of the large diameter part 6a and the small diameter part 6b (the part whose outline is represented by a pair of parallel straight lines in a plan view) is wider than the shaft part 7a of the locking device 7. The twelve through holes 6 are arranged in pairs of two for the first connecting portion 5, and a pair of locking devices 7, 7 are arranged on the upper surface 3d of the first metal plate 3 so that when one shank 7a is positioned inside one of the large diameter portions 6a, the other shank 7a is also positioned inside the other large diameter portion 6a, and when one shank 7a is positioned inside one of the small diameter portions 6b, the other shank 7a is also positioned inside the other small diameter portion 6b.

[0031] In the snake climbing prevention device 1a with the above structure, the first slit 4a of the first main body 4 is connected to the second slit 5a of the first connecting part 5, and because the first main body 4 is elastic, when the first main body 4 is deformed to open the first slit 4a and the second slit 5a, the utility pole P can be placed inside the first main body 4 through the first slit 4a and the second slit 5a as shown in Figure 3(a). Therefore, with the snake climbing prevention device 1a, the installation work on the utility pole P can be performed efficiently in a short time. Furthermore, when the top and bottom of the first main body 4 are attached to the utility pole P using the flexible bands 8 with the umbrella-shaped first connecting portion 5 facing downward, the six first metal plates 3 attached to the first connecting portion 5 so as to form a ring in a plan view will prevent snakes from climbing up the pole over the entire circumferential range of the pole P. In this way, the snake climbing prevention device 1a can reliably prevent snakes from climbing up the pole.

[0032] Furthermore, in snake climbing prevention device 1a, first metal plate 3 is detachable from first connecting part 5, making it easy to replace, thereby saving time and costs required for maintenance. Furthermore, unlike plastic members, first metal plate 3 is less likely to deteriorate, so it can be used for a long period of time. Furthermore, when the snake climbing prevention device 1a is attached to the utility pole P, if the first metal plate 3 is removed from the first connecting part 5 as shown in Figure 3(b), the first metal plate 3 does not become an obstacle when the worker climbs the pole, so the worker can climb the pole safely in a short time and perform high-altitude work efficiently.

[0033] As already mentioned, the snake climbing prevention device 1a is provided with a rod-shaped locking device 7 erected on the upper surface 3d of the first metal plate 3, which consists of a through hole 6 in the shape of a Daruma doll having a large diameter portion 6a and a small diameter portion 6b and provided in the first connecting portion 5, a shaft portion 7a whose base end is fixed to the upper surface 3d of the first metal plate 3 and can be inserted into the small diameter portion 6b, and a head portion 7b attached to the tip of the shaft portion 7a and can only be inserted into the large diameter portion 6a. Therefore, when the shaft portion 7a of the locking device 7 is disposed in the small diameter portion 6b of the through hole 6, the head portion 7b of the locking device 7 is locked into the small diameter portion 6b of the through hole 6, thereby connecting the first metal plate 3 to the first connecting portion 5. On the other hand, when the shaft portion 7a of the locking device 7 is moved from the small diameter portion 6b of the through hole 6 toward the large diameter portion 6a, the head portion 7b of the locking device 7 can pass through the large diameter portion 6a of the through hole 6, and the locked state of the locking device 7 with the through hole 6 is released, so that the first metal plate 3 can be removed from the first connecting portion 5. In this way, the snake climbing prevention device 1a has a simple structure for the locking means that detachably connects the first metal plate 3 to the first connecting portion 5, and therefore the manufacturing cost is low.

[0034] In snake climbing prevention device 1a, first connecting portion 5 is disposed at an obtuse angle with respect to the axial direction of first main body 4, but snake climbing prevention devices of the present invention are not limited to this structure. For example, as in snake climbing prevention device 1b shown in FIG. 3(c), first connecting portion 5 may be disposed at a right angle with respect to the axial direction of first main body 4. However, if first connecting portion 5 is disposed at an acute angle with respect to the axial direction of first main body 4, the first metal plate 3 will not be able to fully prevent snakes from climbing up the pole. Therefore, it is desirable that at least first connecting portion 5 be disposed at a right angle or an obtuse angle with respect to the axial direction of first main body 4. Furthermore, the locking means for detachably connecting the first metal plate 3 to the first connecting portion 5 is not limited to the through holes 6 and locking devices 7. For example, the locking means may be configured to include an elongated hole in the first connecting portion 5 and a rod-shaped body with a tip bent at a right angle, and the rod-shaped body may be locked into the hole or released from the locked state by sliding the rod-shaped body inside the elongated hole along the longitudinal direction of the hole. Furthermore, the through holes 6 provided in the first connecting portion 5 do not necessarily have to be in pairs, and the number thereof is not limited to 12. However, it is desirable that the number of locking devices 7 be equal to the number of through holes 6. [Example]

[0035] Fig. 4(a) and Fig. 4(b) are a perspective view and a plan view, respectively, showing the appearance of snake climbing prevention equipment 1c of the present invention, and Fig. 5(a) to Fig. 5(c) are perspective views of the first cap member 9, the second cap member 10, and the swing suppression member 11, respectively, that constitute snake climbing prevention equipment 1c. Fig. 6(a) is a cross-sectional view showing the second cap member 10 and the swing suppression member 11 attached to a utility pole P, and Fig. 6(b) is a view showing the second cap member 10 in Fig. 6(a) with the second cap member 10 closed. Fig. 7(a) is a view showing the snake climbing prevention equipment 1c attached to a utility pole P, and Fig. 7(b) is a view showing the first cap member 9 and the second cap member 10 in Fig. 7(a) with the first cap member 9 and the second cap member 10 closed. In Fig. 4(a), the reference numeral for the first hinge shaft 14a is omitted to avoid cluttering the drawing. Fig. 6(a) and Fig. 6(b) show a state in which the second cap member 10 and the sway suppressing member 11 are cut together with the utility pole P by a plane including the axial center of the utility pole P.

[0036] As shown in Figures 4(a) and 4(b) and Figures 5(a) and 5(c), the snake climbing prevention device 1c of the present invention comprises a first metal cap member 9, a second cap member 10 installed below the first cap member 9, and a swing suppression member 11 installed on the second cap member 10. The first cap member 9 comprises a cylindrical first main body portion 12 having a first slit 12a in the axial direction, a first connecting portion 13 having a regular hexagonal shape in a plan view and fixed to the side surface 12b so as to be extrapolated onto the first main body portion 12, six first metal plates 14 each swingably connected to each side of the first connecting portion 13 via a first hinge axis 14a, and six first oscillation suppressors 15 arranged so as to be able to abut against the upper surface 14b of the first metal plates 14 and suppress the oscillation of each of the six first metal plates 14.

[0037] The first connecting portion 13 consists of a plate material that protrudes vertically from the side surface 12b of the first main body portion 12, and when viewed in the axial direction of the first main body portion 12 as shown in Figure 4(b), the second slit 13a is arranged so as to form the same straight line as the first slit 12a. The first cap member 9 can be deformed so that the distance between the first slit 12a of the first main body portion 12 and the second slit 13a of the first connecting portion 13 becomes wider, and when the first cap member 9 is deformed so that the distance between the first slit 12a and the second slit 13a becomes wider than the outer diameter of the utility pole P (see Figure 7(a)), the utility pole P can be placed inside the first cap member 9 through the first slit 12a and the second slit 13a.

[0038] The second cap member 10 comprises a cylindrical second main body portion 16 having a third slit 16a in the axial direction, a second connecting portion 17 having a regular hexagonal shape in a plan view and fixed to the side surface 16b near the end portion 16c so as to be extrapolated onto the second main body portion 16, and six second metal plates 18 each swingably connected to each side of the second connecting portion 17 via a second hinge axis 18a (see Figure 6(a) or Figure 6(b)). The second connecting portion 17 consists of a plate material that protrudes vertically from the side surface 16b of the second main body portion 16, and is arranged so that the fourth slit 17a connects to the third slit 16a when viewed in the axial direction of the second main body portion 16 as shown in Figure 5(b). Furthermore, the second cap member 10 can be deformed so that the distance between the third slit 16a of the second main body portion 16 and the fourth slit 17a of the second connecting portion 17 becomes wider, and when the second cap member 10 is deformed so that the distance between the third slit 16a and the fourth slit 17a becomes wider than the outer diameter of the utility pole P (see Figure 7(a)), the utility pole P can be placed inside it through the third slit 16a and the fourth slit 17a.

[0039] The sway suppression member 11 consists of a cylindrical body with a slit 19a in the axial direction, and is installed on the side surface 19c near the end 19b.It is equipped with six second sway suppression devices 20 that abut against the undersides 18b (see Figure 6(a)) of the six second metal plates 18 of the second cap member 10, thereby suppressing their sway. The sway suppression member 11 can be deformed so that the spacing between the slits 19a becomes wider, and when the spacing between the slits 19a is deformed so that it is wider than the outer diameter of the utility pole P (see Figure 7(a)), the utility pole P can be placed inside the slits 19a. The sway suppression member 11 can also be attached to the utility pole P by being fitted onto the second main body portion 16 of the second cap member 10 attached to the utility pole P. In this way, in the snake climbing prevention device 1c, the sway suppression member 11, which is installed so as to be able to move axially in the direction of the first main body portion 12 relative to the utility pole P, has a simple structure, and therefore the sway suppression member 11 can be manufactured inexpensively.

[0040] Although not shown in Figures 6(a) and 6(b), the second cap member 10 and the sway suppression member 11 are fixed to the utility pole P using the flexible band 8, in the same way as in the case of the mounting member 2, as already explained using Figure 3(a). Therefore, by loosening the fastening by the flexible band 8, the sway suppression member 11 becomes able to slide up and down. In this way, the snake climbing prevention device 1c makes it easy to install the second cap member 10 and the sway suppression member 11 on the utility pole P, so the installation work on the utility pole can be done efficiently in a short time.

[0041] When the second cap member 10 is installed below the first cap member 9 so that the second metal plate 18 abuts against the first metal plate 14, the first swing suppressor 15 prevents the first metal plate 14 from swinging upward, and therefore the second metal plate 18 also cannot swing upward. Furthermore, as shown in FIG. 6(a), when the second swing suppressor 20 of the swing suppressor 11 abuts against the underside 18b of the second metal plate 18, the second metal plate 18 also cannot swing downward. Therefore, as shown in FIG. 7(a), the snake climbing prevention device 1c maintains the first metal plate 14 in an open state. On the other hand, when the clamping force of the flexible band 8 is loosened to allow the sway suppressing member 11 to slide up and down, and the sway suppressing member 11 is moved downward so that the second sway suppressing device 20 does not abut the underside 18b of the second metal plate 18, the second metal plate 18 becomes able to swing downward and enters the closed state as shown in FIG. 6(b) due to its own weight. This also allows the first metal plate 14 to swing downward, and the first metal plate 14 also enters the closed state due to its own weight as shown in FIG. 7(b). Note that when the sway suppressing member 11 is moved upward to bring the second sway suppressing device 20 into abutment with the underside 18b of the second metal plate 18, the second metal plate 18 enters the open state again.

[0042] As shown in Figure 7(b), when the first metal plate 14 is swung downward, it does not become an obstacle to the worker climbing the utility pole P, allowing the worker to climb the pole safely in a short time and efficiently perform work at height. At this time, because the first metal plate 14 is connected to the first connecting part 13, the first metal plate 14 of the snake climbing prevention device 1c does not need to be held by the worker after being removed from the first connecting part 5, unlike the first metal plate 3 of the snake climbing prevention device 1a.

[0043] In the first cap member 9 of the snake climbing prevention device 1c, unlike the first metal plate 3 connected to the first connecting portion 5 in the snake climbing prevention device 1a, the first metal plate 14 connected to the first connecting portion 13 is not arranged to form a ring shape in a plan view. In this case, in order to prevent snakes from passing between two adjacent first metal plates 14, 14, it is conceivable to increase the number of first metal plates 14 and narrow the gap between the two first metal plates 14, 14. However, in snake climbing prevention device 1c, second cap member 10 is installed on utility pole P so that second metal plate 18 is positioned between two adjacent first metal plates 14, 14 when viewed in the axial direction of first main body 12 of first cap member 9. This prevents snakes from passing between the two adjacent first metal plates 14, 14. In other words, snake climbing prevention device 1c does not require a large number of first metal plates 14. Furthermore, since second metal plates 18 only need to be positioned between two adjacent first metal plates 14, 14 when viewed in the axial direction of first main body 12, the number of second metal plates 18 can be the same as the number of first metal plates 14. Thus, in snake climbing prevention device 1c, the simple structure of first cap member 9 and second cap member 10 reduces manufacturing costs.

[0044] Note that the snake climbing prevention device 1c is not limited to the above-described structure. For example, if the first cap member 9 has a large number of first metal plates 14 and there is no need to install the second cap member 10, the installation of the second cap member 10 may be omitted. In this case, when the second swing suppression device 20 of the swing suppression member 11 abuts against the first metal plate 14 of the first cap member 9, the first metal plate 14 cannot swing downward. However, when the swing suppression member 11 is moved downward to a position where the second swing suppression device 20 is not abutting against the first metal plate 14, the first metal plate 14 of the first cap member 9 can swing downward. Furthermore, for example, the shape of the first connecting portion 13 and the second connecting portion 17 when viewed in a plane may be a regular polygon other than a regular hexagon, and the number of first metal plates 14 and second metal plates 18 is not limited to six but can be changed as appropriate depending on the shape of the first connecting portion 13 and the second connecting portion 17. [Industrial Applicability]

[0045] The snake climbing prevention device of the present invention can be used to prevent electric wire ground faults and electric shock accidents caused by snakes climbing utility poles installed in mountainous areas, etc. [Explanation of symbols]

[0046] DESCRIPTION OF SYMBOLS 1a to 1c... Snake climbing prevention device 2... Mounting member 3... First metal plate 3a... First arc 3b... Second arc 3c... Straight line 3d... Top surface 4... First main body 4a... First slit 4b... Side surface 5... First connecting portion 5a... Second slit 6... Through hole 6a... Large diameter portion 6b... Small diameter portion 7... Locking device 7a... Shaft portion 7b... Head portion 8... Free band 9... First cap member 10... Second cap member 11... Swing suppression member 12... First main body 12a... First slit 12b... Side surface 13... First connecting portion 13a... Second slit 14... First metal plate 14a... First hinge shaft 14b... Top surface 15... First swing suppression device 16...Second main body portion 16a...Third slit 16b...Side surface 16c...End portion 17...Second connecting portion 17a...Fourth slit 18...Second metal plate 18a...Second hinge shaft 18b...Underside 19a...Slit 19b...End portion 19c...Side surface 20...Second oscillation suppressing device P...Utility pole

Claims

1. A snake climbing prevention device that is installed on a utility pole for the purpose of preventing snakes from climbing, a cylindrical first main body portion having elasticity and a first slit provided in an axial direction; a first connecting portion having a plate shape and fixed to a side surface of the first main body portion; a plurality of first metal plates detachably or swingably connected to the first connecting portion so as to project laterally from the side surface of the first main body portion in a canopy shape, A snake climbing prevention device characterized in that a second slit is provided in the first connecting portion so as to form the same straight line as the first slit when viewed in the axial direction of the first main body portion.

2. a locking means for detachably connecting the first metal plate to the first connecting portion, the first connecting portion has a circular ring shape in a plan view, 2. The snake climbing prevention device according to claim 1, wherein the first metal plate has a shape of a ring divided in the circumferential direction when viewed in a plane.

3. The locking means is a potbelly-shaped through hole provided in the first connecting portion and having a large diameter portion and a small diameter portion; The first metal plate is configured by a rod-shaped fastening tool provided upright on an upper surface thereof, The locking device is a shaft portion having a base end fixed to the upper surface of the first metal plate and capable of being inserted into the small diameter portion; 3. The snake climbing prevention device according to claim 2, further comprising a head portion attached to the tip of the shaft portion and capable of being inserted only into the large diameter portion.

4. a first rocking motion suppressor fixed to at least one of the first connecting portion and the first main body portion so as to be able to abut against an upper surface of the first metal plate; a vibration suppression member disposed below the first metal plate and movable in the axial direction of the first main body portion; the first connecting portion has a regular polygonal shape in a plan view, the first metal plate is swingably connected to each side of the regular polygon via a first hinge shaft with respect to the first connecting portion, The snake climbing prevention device described in claim 1, characterized in that the swinging suppression member is provided with a second swinging suppression device that directly or indirectly abuts the underside of the first metal plate to suppress the swinging of the first metal plate.

5. The snake climbing prevention device described in claim 4, characterized in that the swinging suppression member consists of a cylindrical body with a slit in the axial direction, and the second swinging suppression device is installed on the side near the end.

6. a cylindrical second body portion having elasticity and a third slit formed in an axial direction, the second body portion being disposed below the first metal plate; a second connecting portion made of a plate material that forms the same regular polygon as the first connecting portion when viewed in a plane, and that is fixed to a side surface of an end portion of the second main body portion; a plurality of second metal plates connected to the second connecting portion so as to protrude laterally from the end side surface of the second main body portion in a cap shape, a fourth slit is provided in the second connecting portion so as to form a straight line with the third slit when viewed in the axial direction of the second main body portion; the second metal plate is swingably connected to each side of the regular polygon via a second hinge shaft with respect to the second connecting portion, The snake climbing prevention device described in claim 4 or claim 5, characterized in that the swinging suppression member is installed below the second metal plate so that the second swinging suppression device abuts the underside of the first metal plate via the second metal plate to suppress the swinging of the first metal plate and the second metal plate.

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