Cover

Abstract

To provide a cover used for an insulator having a charged part and capable of preventing birds or the like from coming into contact with the charged part.SOLUTION: A cover 10 is used for an insulator 100 including a charge part 101 and an insulation part 102 continuously in this order from an upper side in a vertical direction, and includes an attachment part 11 having a substantially cylindrical shape extending in the vertical direction and attached to a lower end of the charge part 101, and a contact prevention part 12 provided at a lower end of the attachment part 11. The contact prevention part 12 extends downward in a direction crossing the vertical direction so that at least a part of the insulation part 102 is disposed in an internal space of the contact prevention part 12 in a state where the cover 10 is attached to the insulator 100.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a cover for use with an insulator having a charged portion. [Background technology]

[0002] Generally, when an electric wire is fastened to a wire support such as a utility pole, an insulating insulator is interposed between the wire support and the electric wire. Some insulators are also used to pull a distribution line from the wire support into a building (see, for example, Patent Document 1). Many insulators used for such purposes are installed, for example, on the so-called cross arm of the wire support. Some of these insulators have a charging part 101, as shown in FIGS. 8 to 10. The insulator 100 shown in FIGS. 8 to 10 has a terminal processed so that a drop wire 30 extending from a building is pulled into the insulator 100 and the drop wire 30 is electrically connected to the charging part 101. A distribution line (not shown) suspended on the wire support EP is connected to the charging part 101, thereby electrically connecting the drop wire 30 and the distribution line (not shown). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-271958 [Patent Document 2] Japanese Patent Publication No. 2020-068612 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the cross arm of the overhead line support is a likely resting place for birds. For this reason, in the insulator 100 shown in Figures 8 to 10, bird B perching on cross arm A may come into contact with the charging part 101, causing a short circuit (see the arrow in Figure 10) or damaging the insulator, resulting in bird damage. As a measure against this type of bird damage, Patent Document 2 discloses a pincushion-shaped bird prevention device for cross arms, but birds may enter the gaps between the pincushions to rest, so this cannot completely prevent the bird damage.

[0005] Furthermore, as a measure against bird damage, a protective cover 20 is usually attached to the charging part 101 as shown in Fig. 9, but this does not completely prevent bird damage because birds can easily insert their beaks into the gap between the charging part 101 and the protective cover 20 as shown in Fig. 10. Thus, in insulators having a charging part, it is desirable to more reliably prevent birds and the like from coming into contact with the charging part.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and its object is to provide a cover that is used for an insulator having a charged part and that can prevent birds and the like from coming into contact with the charged part. [Means for solving the problem]

[0007] In order to achieve the above object, the cover according to the present invention comprises: A cover used for an insulator having a conductive charging portion and an insulating portion, which are successively arranged in this order from the upper side in a vertical direction, a mounting portion having a substantially cylindrical shape extending in the vertical direction and mounted to a lower end of the charging portion; a contact prevention portion provided at a lower end of the mounting portion, The contact prevention portion is the insulating portion extends downward in a direction intersecting the vertical direction so that at least a portion of the insulating portion is disposed in an internal space of the contact prevention portion when the cover is attached to the insulator. It's a cover.

[0008] In order to achieve the above-mentioned object, the cover according to the present invention comprises: A cover used for an insulator having a conductive charging portion and an insulating portion, which are successively arranged in this order from the upper side in a vertical direction, a mounting portion having a substantially spherical shape extending in the vertical direction so as to cover the charging portion, the mounting portion being mounted on the charging portion; a contact prevention portion provided at a lower end of the mounting portion, The contact prevention portion is the insulating portion extends downward in a direction intersecting the vertical direction so that at least a portion of the insulating portion is disposed in an internal space of the contact prevention portion when the cover is attached to the insulator. It's a cover. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a cover that is used for an insulator having a charged part and that can prevent birds and the like from coming into contact with the charged part.

[0010] The present invention has been briefly described above. The details of the present invention will become clearer by reading the following detailed description of the invention (hereinafter referred to as "embodiments") with reference to the accompanying drawings. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a schematic front view showing a state in which a cover according to one embodiment of the present invention is attached to an insulator. [Figure 2] FIG. 2 is a schematic cross-sectional view of FIG. [Figure 3] FIG. 3 is a top view of the cover shown in FIG. [Figure 4] 4(a) is a front view of the cover shown in FIG. 1, and FIG. 4(b) is a schematic cross-sectional view of the cover shown in FIG. [Figure 5] 5A and 5B are diagrams showing a first modified example of the cover shown in FIG. 1, in which (a) is a schematic cross-sectional view, and (b) is a schematic cross-sectional view showing a manner in which the cover is attached to an insulator. [Figure 6] 6A and 6B are diagrams showing a second modified example of the cover shown in FIG. 1, in which (a) is a schematic cross-sectional view, and (b) is a schematic cross-sectional view showing a manner in which the cover is attached to the insulator. [Figure 7] 7A and 7B are diagrams showing a third modified example of the cover shown in FIG. 1, in which (a) is a schematic cross-sectional view, and (b) is a schematic cross-sectional view showing a manner in which the cover is attached to the insulator. [Figure 8] FIG. 8 is a front view showing an example of a schematic configuration of an insulator in which the cover shown in FIG. 1 is used. [Figure 9] FIG. 9 is a schematic cross-sectional view of FIG. [Figure 10] FIG. 10 is a diagram for explaining an example of bird damage. DETAILED DESCRIPTION OF THE INVENTION

[0012] <Insulator outline> First, an example of the schematic configuration of an insulator 100 using the cover 10 according to this embodiment will be described. Note that the components of the insulator 100, as well as the names and functions of the components, described below, are used for convenience of explanation and may differ from the actual configuration, names and functions of the components. However, the cover 10 according to this embodiment can be used for an insulator in which a charging portion and an insulating portion are successively arranged in this order from the vertically upper side.

[0013] As shown in Fig. 8 etc., insulator 100 has conductive charged portion 101 and insulating portion 102, which are arranged vertically from the top down. As shown in Fig. 9 etc., insulator 100 has drop wire 30 extending from a building or the like drawn into it, and is terminated so that drop wire 30 is conductively connected to charged portion 101. A distribution line or the like (not shown) suspended on an overhead line support EP is connected to charged portion 101, thereby conductively connecting drop wire 30 and the distribution line.

[0014] The charging unit 101 includes a terminal unit 103, a crimping unit 104, and a sealing unit 105, which are arranged vertically from the top to the bottom. The terminal unit 103 functions, for example, as a connection unit with the power distribution line described above. The crimping unit 104 functions, for example, to crimp the conductor core wire 31 exposed from the insulating coating 32 of the drop wire 30 drawn into the insulator 100. The sealing unit 105 has a larger diameter than the terminal unit 103 and the crimping unit 104 when the protective cover 20 is attached to the charging unit 101, as described below, and functions to seal the space where the charging unit 101 is covered by the protective cover 20 to prevent foreign matter from entering from below.

[0015] The insulating part 102 includes a porcelain tube 106, a bracket receiver 107, and an insertion part 108, which are arranged vertically from the top. The porcelain tube 106 has, for example, a known shape and a known function. The bracket receiver 107 functions, for example, as a receiver for a bracket (not shown) for fixing the insulator 100 to the cross arm A. A portion of the insertion part 108 is inserted into the cross arm A.

[0016] Typically, in the insulator 100 described above, a protective cover 20 is attached to the charging portion 101 from the viewpoint of protecting the charging portion 101, as shown in FIG. 9 and other figures. This protective cover 20 includes a first portion 21 having a dome-like shape that is elongated in the vertical direction so as to cover the terminal portion 103 and the crimping portion 104, and a second portion 22 having a larger diameter than the first portion 21 so as to cover the sealing portion 105, which are arranged in this order from the vertically upper side. As shown in FIG. 10 and other figures, a hole 21a is provided at the top of the first portion 21, through which, for example, a distribution line can be inserted. In addition, the second portion 22 is configured to be spaced apart from the sealing portion 105 without being in close contact with it so that rainwater or the like that enters through the hole 21a can be discharged to the outside.

[0017] <Cover> Next, a description will be given of the cover 10 according to this embodiment. The cover 10 mainly functions to prevent birds and the like from contacting the charging portion 101, particularly the sealing portion 105.

[0018] 1 to 4, the cover 10 is integrally provided with a mounting portion 11 and a contact prevention portion 12. The mounting portion 11 is a portion of the cover 10 that is mounted to the insulator 100, and extends in a substantially cylindrical shape in the vertical direction. The mounting portion 11 is mounted to the seal portion 105 of the insulator 100 via the second portion 22 of the protective cover 20.

[0019] The contact prevention part 12 extends downward in a direction intersecting the vertical direction from the lower end of the mounting part 11. More specifically, the contact prevention part 12 has a tapered cylindrical shape that extends downward while expanding in the radial direction (i.e., in a direction inclined radially outward with respect to the vertical direction).

[0020] The extension length L (see FIG. 4(b)) of the contact prevention part 12 is preferably set to 70 mm or more, taking into consideration the beak length of common crows, which are prone to bird damage, but is not limited to this and can be set as appropriate. Similarly, the tilt angle θ (see FIG. 4(b)) of the contact prevention part 12 is preferably set to 28 degrees or less, taking into consideration the beak length of common crows, but is not limited to this and can be set as appropriate. However, the tilt angle θ (see FIG. 4(b)) of the contact prevention part 12 can be calculated, for example, by the following formula (1), where X is the length of the bird's beak. θ=-0.3095X+49.81 (1)

[0021] Rib-like reinforcing portions 13 are provided at multiple locations (four locations in this example) on the outer peripheral surfaces of the mounting portion 11 and the contact prevention portion 12, extending in the direction of extension of the mounting portion 11 and the contact prevention portion 12 (extending vertically and then in a direction inclined relative to the vertical) in accordance with the outer peripheral shapes of the mounting portion 11 and the contact prevention portion 12 (see FIG. 3 in particular). The reinforcing portions 13 have the function of preventing the contact prevention portion 12 from losing its shape (so-called settling) and maintaining the shape of the contact prevention portion 12. Here, for example, if the shape of the contact prevention portion 12 loses and the contact prevention portion 12 comes into contact with the porcelain tube 106, a tracking phenomenon may occur. In other words, the reinforcing portions 13 maintain a non-contact state between the contact prevention portion 12 and the porcelain tube 106, thereby preventing the above-mentioned tracking phenomenon from occurring.

[0022] A window 14 is provided in the peripheral wall of the mounting portion 11, penetrating from the inside to the outside of the mounting portion 11. The window 14 functions as a window for checking the mounting state of the cover 10 on the insulator 100. In the above mounting state in which the cover 10 is mounted on the insulator 100 via the protective cover 20, by looking through the window 14, the protective cover 20 can be seen, and it can be determined whether the cover 10 is mounted on the insulator 100 correctly.

[0023] The above has described the various components that make up the cover 10. To attach the cover 10 to the insulator 100, for example, the protective cover 20 is attached from above to the charged portion 101 of the insulator 100 shown in Fig. 8. Then, the cover 10 is attached from above to the insulator 100 to which the protective cover 20 shown in Fig. 9 has been attached. This completes the attachment of the cover 10 to the insulator 100. When the cover 10 is attached to the insulator 100, a part of the insulating portion 102 of the insulator 100, i.e., a part of the upper end of the porcelain tube 106, is positioned in the internal space (inside the cylindrical bore) of the contact-preventing portion 12.

[0024] <Actions and Effects> As described above, according to this embodiment, the contact prevention portion 12 provided at the lower end of the mounting portion 11 extends downward in a direction intersecting the vertical direction so that at least a portion of the insulating portion 102 is positioned in the internal space of the contact prevention portion 12 when the cover 10 is mounted on the insulator 100, thereby preventing birds and the like from contacting the charged portion 101.

[0025] Furthermore, according to this embodiment, the contact prevention part 12 has a tapered, approximately cylindrical shape that expands radially and extends downward, making it easy to attach to the charging part 101 and more appropriately preventing birds and other animals from contacting the charging part 101.

[0026] Furthermore, according to this embodiment, rib-like reinforcing portions 13 extending in the extension direction of the mounting portion 11 and the contact prevention portion 12 are provided at multiple locations on the outer circumferential surfaces of the mounting portion 11 and the contact prevention portion 12, thereby preventing the contact prevention portion 12 from losing its shape (so-called settling) and maintaining the shape of the contact prevention portion 12. In other words, according to this embodiment, it is possible to prevent a tracking phenomenon that may occur when the contact prevention portion 12 and the insulating portion 102 come into contact with each other.

[0027] Furthermore, according to this embodiment, a window portion 14 that penetrates the inside and outside of the mounting portion 11 is provided in the peripheral wall of the mounting portion 11, so that when the cover 10 is attached to the insulator 100, the protective cover 20 can be seen by looking through the window portion 14, and it can be determined whether the cover 10 is correctly attached to the insulator 100.

[0028] <First Modification> The first modified example will be described below with reference to Fig. 5. The cover 10A of the first modified example differs from the cover 10 of the above embodiment in the shapes of the contact prevention portions 12, 12A and the presence or absence of the water passage portion 15. As the other configurations are the same, the same components are assigned the same reference numerals and descriptions thereof will be omitted as much as possible.

[0029] The cover 10A integrally includes an attachment portion 11, a contact prevention portion 12A, and a water passage portion 15. The contact prevention portion 12A extends downward from the lower end of the attachment portion 11 in a direction intersecting the vertical direction. More specifically, the contact prevention portion 12A has a disk shape extending radially inward from the lower end of the attachment portion 11. The water passage portion 15 is provided along the entire inner periphery of the contact prevention portion 12A and is made of, for example, a mesh. The water passage portion 15 has the function of discharging rainwater and the like that has entered through the holes 21a to the outside.

[0030] The cover 10A may also be provided with the reinforcing portion 13 and the window portion 14. The operation and effect of the cover 10A are the same as those of the cover 10 of the above embodiment. The first modified example has been described above.

[0031] <Second Modification> The second modified example will be described below with reference to Fig. 6. The difference between the cover 10B of the second modified example and the cover 10 of the above embodiment is the shape of the contact prevention portions 12, 12B. As the other configurations are the same, the same components are assigned the same reference numerals and descriptions thereof will be omitted as much as possible.

[0032] The cover 10B integrally includes the mounting portion 11 and the contact prevention portion 12B. The contact prevention portion 12B extends downward from the lower end of the mounting portion 11 in a direction intersecting the vertical direction. More specifically, the contact prevention portion 12B has a tapered cylindrical shape that extends downward while reducing in diameter in the radial direction (i.e., in a direction inclined radially inward with respect to the vertical direction).

[0033] The cover 10B may also be provided with the reinforcing portion 13 and the window portion 14. The operation and effect of the cover 10B are the same as those of the cover 10 of the above embodiment. The second modified example has been described above.

[0034] <Other variations> Another modified example will be described below with reference to Fig. 7. A cover 10C of this modified example integrally includes a disk-shaped mounting portion 11C and a water passage portion 15 provided along the entire inner periphery of the mounting portion 11C. The water passage portion 15 is made of, for example, a mesh, and has the function of discharging rainwater and the like that has entered through the holes 21a to the outside.

[0035] The operation and effect of the cover 10C are similar to those of the cover 10 of the above embodiment. Other modifications have been described above.

[0036] <Other forms> The present invention is not limited to the above-described embodiments, and can be appropriately modified, improved, etc. Furthermore, the material, shape, size, number, location, etc. of each component in the above-described embodiments are arbitrary and not limited as long as they can achieve the present invention.

[0037] For example, the contact prevention portion 12 of the cover 10 may be integrally provided at the lower end of the second portion 22 of the protective cover. In this case, the protective cover 20 provided with the contact prevention portion 12 will be referred to as the cover 10.

[0038] <Additional Notes> Here, the features of the above-described embodiments of the cover according to the present invention will be briefly summarized and listed below in [1] to [5].

[0039] [1] A cover (10, 10A, 10B) used for an insulator (100) having a conductive charging portion (101) and an insulating portion (102) continuously arranged in this order from the upper side in a vertical direction, a mounting portion (11) having a substantially cylindrical shape extending in the vertical direction and mounted to a lower end of the charging portion (101); a contact prevention portion (12, 12A, 12B) provided at a lower end of the mounting portion (11), The contact prevention portion (12, 12A, 12B) is the contact prevention portions (12, 12A, 12B) extend downward in a direction intersecting the vertical direction so that at least a part of the insulating portion (102, porcelain bushing 106) is disposed in an internal space of the contact prevention portions (12, 12A, 12B) when the cover (10) is attached to the insulator (100). Cover (10, 10A, 10B).

[0040] According to the configuration [1] above, the contact prevention part provided at the lower end of the mounting part extends downward in a direction intersecting the vertical direction so that at least a part of the insulating part of the insulator is positioned in the internal space of the contact prevention part when mounted on the insulator, thereby preventing birds and the like from contacting the charged part of the insulator.

[0041] [2] The cover (10) described in [1] above, The contact prevention portion (12) has a tapered, generally cylindrical shape that expands radially and extends downward. Cover(10).

[0042] According to the configuration [2] above, the contact prevention part has a tapered, approximately cylindrical shape that expands radially and extends downward, making it easy to attach the insulator to the charged part and more effectively preventing birds and other animals from contacting the charged part.

[0043] [3] The cover (10) according to [1] or [2] above, Rib-shaped reinforcing portions (13) extending along the extension direction of the mounting portion (11) and the contact prevention portion (12) are provided at a plurality of locations on the outer circumferential surfaces of the mounting portion (11) and the contact prevention portion (12). Cover(10).

[0044] According to the configuration [3] above, rib-shaped reinforcing portions extending in the direction of extension of the mounting portion and the contact prevention portion are provided at multiple locations on the outer circumferential surfaces of the mounting portion and the contact prevention portion, thereby preventing the contact prevention portion from losing its shape (so-called settling) and maintaining its shape. In other words, this configuration makes it possible to prevent tracking, which can occur when the contact prevention portion comes into contact with the insulating portion of the insulator.

[0045] [4] A cover (10) according to any one of [1] to [3] above, A window portion (14) penetrating from the inside to the outside of the mounting portion (11) is provided on the peripheral wall of the mounting portion (11). Cover(10).

[0046] According to the configuration [4] above, a window portion that penetrates the inside and outside of the mounting portion is provided in the peripheral wall of the mounting portion, so that when the cover is attached to the insulator, by looking at the window portion, it is possible to determine whether the cover is correctly attached to the insulator.

[0047] [5] A cover (e.g., 10) used for an insulator (100) having a conductive charged portion (101) and an insulating portion (102) successively arranged in this order from the upper side in the vertical direction, a mounting portion (e.g., 20) that has a substantially spherical shape extending in the vertical direction so as to cover the charging portion (101) and is mounted on the charging portion (101); A contact prevention portion (e.g., 12, 12A, 12B) provided at a lower end of the mounting portion (e.g., 20), The contact prevention portion (e.g., 12, 12A, 12B) is The insulating portion (102, porcelain tube 106) extends downward in a direction intersecting the vertical direction so that at least a part of the insulating portion (102, porcelain tube 106) is disposed in an internal space of the contact prevention portion (e.g., 12, 12A, 12B) when the cover (10) is attached to the insulator (100). Cover (e.g., 10).

[0048] According to the configuration [5] above, the contact prevention part provided at the lower end of the mounting part extends downward in a direction intersecting with the vertical direction so that at least a part of the insulating part of the insulator is disposed in the internal space of the contact prevention part when the mounting part is mounted on the insulator, thereby preventing birds and other animals from contacting the charged part of the insulator. In addition, the charged part can be protected by the mounting part. [Explanation of symbols]

[0049] 10, 10A, 10B, 10C Cover 11,11C attachment part 12,12A,12B Contact prevention part 13 Reinforcement 14 Window section 15 Water flow section 20 Protective cover 30 Service line 100 insulators 101 Charged part 102 Insulation part

Claims

1. A cover used for an insulator having a conductive charging portion and an insulating portion, which are successively arranged in this order from the upper side in a vertical direction, a mounting portion having a substantially cylindrical shape extending in the vertical direction and mounted to a lower end of the charging portion; a contact prevention portion provided at a lower end of the mounting portion, The contact prevention portion is the insulating portion extends downward in a direction intersecting the vertical direction so that at least a portion of the insulating portion is disposed in an internal space of the contact prevention portion when the cover is attached to the insulator. cover.

2. 2. The cover of claim 1, The contact prevention portion has a tapered, generally cylindrical shape that expands radially and extends downward. cover.

3. 2. The cover of claim 1, Rib-shaped reinforcing portions are provided at a plurality of locations on the outer peripheral surfaces of the mounting portion and the contact prevention portion, the reinforcing portions extending in the extending direction of the mounting portion and the contact prevention portion. cover.

4. 2. The cover of claim 1, A window portion penetrating the inside and outside of the mounting portion is provided on the peripheral wall of the mounting portion. cover.

5. A cover used for an insulator having a conductive charging portion and an insulating portion, which are successively arranged in this order from the upper side in a vertical direction, a mounting portion having a substantially spherical shape extending in the vertical direction so as to cover the charging portion, the mounting portion being mounted on the charging portion; a contact prevention portion provided at a lower end of the mounting portion, The contact prevention portion is the insulating portion extends downward in a direction intersecting the vertical direction so that at least a portion of the insulating portion is disposed in an internal space of the contact prevention portion when the cover is attached to the insulator. cover.

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