JP2001195936A - Suspension insulator cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a suspension insulator cover, which dose not exhibit a decrease in its electrical insulating property even when being wet with rainwater. SOLUTION: A suspension insulator cover 1 is removably attached to a suspension insulator 3. In a state where the cover 3 surrounds the suspension insulator 3, a back face of a shoulder 5 of the cover 1 is caught by the suspension insulator 3 so that the cover 3 is supported by the suspension insulator 3. On the upper surface of the cover 1, there is formed an exposure hole 50 through which the upper surface of the suspension insulator 3 is partially exposed. On the lower surface of the cover 1, there is formed a drainage hole 16 through which water collected in the inside of the cover 1 is discharged to the outside. Further, on the back face-side of the shoulder 5, there are disposed a plurality of ribs that are in contact with the upper portion of the suspension insulator 3. In addition, a drainage channel is formed, which is extended from the exposure hole 50 to the drainage hole 16 via spaces between the plural ribs. Thus, rainwater inflowing in the inside of the cover 1 is guided to the drainage hole 16 in a smooth manner and discharged to the outside, so that the electrical insulating property of the cover 1 is not decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electrically insulating suspension insulator cover.

[0002]

2. Description of the Related Art Conventionally, as this type of suspension insulator cover, for example, one disclosed in Japanese Patent Application Laid-Open No. Hei 6-20546 is known. The suspension insulator cover includes a lower cover made of a bottomed tubular body, and an upper cover connected to the lower cover via a hinge and capable of closing an upper opening of the lower cover. The upper part is covered, and the lower part covers the lower part of the suspension insulator. This suspension insulator cover is supported in a state where the shoulder of the upper cover is hooked on the upper portion of the suspension insulator.

[0003]

Here, in the above-mentioned suspension insulator cover, since the lower cover is made of a bottomed cylindrical body, when exposed to rainwater, rainwater accumulates in the lower cover. When the rainwater accumulates inside in this way, the electrical insulation is greatly reduced. In order to solve this problem, it is conceivable to provide a drain hole on the bottom surface of the lower cover.

However, even if a drain hole is provided in the bottom surface of the lower cover, the shoulder of the upper cover contacts the upper part of the suspension insulator, and the contact portion forms a circular closed loop. There remains a problem that rainwater easily accumulates in the upper space. An object of the present invention is to solve the above problems, and an object of the present invention is to provide a suspension insulator cover which does not impair electrical insulation even when exposed to rainwater.

[0005]

Means for Solving the Problems and Effects of the Invention In order to solve the above-mentioned problems, the present invention is removably attached to a suspension insulator, and the back surface of the shoulder is wrapped around the suspension insulator. An electrically insulating suspension insulator cover that is supported on the suspension insulator by being hooked on the insulator, and is provided on an upper surface, an exposure hole that partially exposes an upper portion of the suspension insulator, and an exposure hole that is provided on a lower surface and accumulates inside. A drain hole for discharging water to the outside, a plurality of ribs erected on the back side of the shoulder portion and in contact with the upper part of the suspension insulator, and the drainage through the gap between the plurality of ribs from the exposed hole. And a drainage path leading to the hole.

The suspension insulator cover is supported by the suspension insulator by enclosing the suspension insulator, with the back surface of the shoulder hooking on the suspension insulator. At this time, the ribs standing on the back side of the shoulder and the upper part of the suspension insulator come into contact with each other, creating a gap between the shoulder and the suspension insulator, so that the shoulder and the suspension insulator come into close contact. Then, the contact portion does not form a circular closed loop, and there is no danger of rainwater accumulating in the space above the contact portion. In addition, since a drainage path is provided from the exposed hole to the drain hole through the space between the plurality of ribs, rainwater that enters the inside of the suspension insulator from the exposed hole through the space between the ribs is drained to the drain hole. It is guided smoothly and there is no danger of rainwater accumulating inside the suspension insulator cover. Therefore, according to this suspension insulator cover, even if it is exposed to rainwater, the rainwater does not accumulate on the upper part or inside of the cover, and there is obtained an effect that there is no risk of impairing the electrical insulation.

In the suspension insulator cover of the present invention, it is preferable that the plurality of ribs have a shape extending substantially vertically. In this case, since the drainage path extends substantially in the vertical direction, the drainage property is further improved, and the possibility that rainwater accumulates inside the suspension insulator cover is reliably eliminated.

[0008] The suspension insulator cover of the present invention preferably has an inclined surface which is inclined downward toward the drain hole. In this case, since the rainwater is guided toward the drainage hole by the inclined surface, the rainwater that has entered the inside of the suspension insulator cover can be quickly and reliably discharged from the drainage hole.

The suspension insulator cover of the present invention may be used to wrap a suspension insulator for suspending an overhead electric wire below and suspending a trolley wire below the overhead electric wire via a support member. Good. At this time, a pair of divided bodies each having a vertically divided shape are joined to form a suspension insulator cover, and the drain hole is attached to the suspension insulator with the support member inserted therethrough. In this manner, the support member for suspending the trolley wire using the drain hole can be exposed and mounted.

[0010]

FIG. 1 is a perspective view schematically showing a suspension insulator cover 1 according to an embodiment of the present invention. The suspension insulator cover 1 is detachably attached to the suspension insulator 3, and the shoulder insulator 5 wraps around the suspension insulator 3.
Is supported by the suspension insulator 3 by being hooked on the insulator main body 81 (see FIG. 7) of the suspension insulator 3, and a plurality of mutually attachable, two divided bodies in the present embodiment. 4a and 4b. Each divided body 4
a and 4b are each made of a synthetic resin that is an electrically insulating material, for example, polyethylene or polypropylene;
In a state where the electric wire suspension portion of the suspension insulator 3 and the overhead electric wire portion near the suspension insulator 3 are covered, opposing ends 7a, 8a, 9a, 1
0a; 7b, 8b, 9b, 10b (the opposite end 10b is
1 (not shown in FIG. 1) can be attached to each other. Each of the divided bodies 4a and 4b has a shape obtained by dividing the suspension insulator cover 1 into two vertically.

One of the opposed ends 7a to 10a; 7b to 10b of the divided bodies 4a and 4b which abut against each other is provided along one of the opposed ends 7a and 10a; Protruding ridges 12a and 12b are formed and the opposed ends 7a to 10a;
7b, the other opposed end portions 8a, 9a, b;
10b is formed with grooves 13a and 13b extending along the other opposite end and into which the ridges 12a and 12b are fitted. Further, as shown in FIG. 1, a water drain hole 16 is formed in a portion 15 where the divided bodies 4a and 4b are attached to each other and arranged below in a state of being attached to the suspension insulator 3.

FIG. 2 is a front view showing the divided body 4a,
FIG. 3 is a plan view showing the divided body 4a, FIG. 4 is a right side view showing the divided body 4a, and FIG. 5 is a rear view showing the divided body 4a. Each divided body 4a, 4b is formed in the same shape as each other. Hereinafter, one of the divided bodies 4a will be described in detail, and the other divided body 4b will not be described in detail, and the same components as those of the one divided body 4a will be replaced by subscripts “b”. Indicated by the same reference numeral.

One of the divided bodies 4a is composed of a cover body 17a for covering a wire suspension portion of the suspension insulator 3 and an overhead electric wire portion near the suspension insulator 3, and a joining piece for joining with the other divided body 4b. 18a, 19a, 20a, and 21a.
The cover main body 17a has an insulator accommodating portion 23a and electric wire accommodating portions 24a and 25a.

The insulator accommodating portion 23a has a substantially semi-cylindrical peripheral wall 26a and substantially semi-circular end walls 27a and 28a partially closing both ends in the axial direction of the peripheral wall 26a. The formed insulator accommodating space 34a is
It is open at an open end face substantially along one virtual plane including the axis L1a of FIG. A peripheral wall 26 is provided on each end wall 27a, 28b.
semicircular notches 30a, 31a coaxial with the axis L1a
Are formed, and by these notches 30a, 31a,
The insulator accommodating space 34a is also open in the axial direction.

Notch 3 in one end wall 27a, which is disposed above with suspension insulator cover 1 mounted on suspension insulator 3
0a is a notch 3 of the other end wall 28a disposed below.
The inner diameter is larger than 1a. In addition, the peripheral wall 26a
Has an inclined portion 32a on the side of the other end wall 28a which approaches the open end of the insulator accommodating portion 23a as approaching the other end wall 28a. The inclined portion 32a is perpendicular to the axis L1a and extends along the open end face of the insulator accommodating portion 23a.
It is formed parallel to 2a.

One of the electric wire accommodating portions 24a is
3a is connected to the peripheral wall 26a at an intermediate portion in the axial direction and at one end in the circumferential direction, and along the axis L2a, the insulator accommodating portion 23
a. This wire housing portion 24a
An electric wire housing space 35a formed in a semi-cylindrical shape with the axis L2a as an axis is opened at almost the same open end face as the insulator housing space 34a, and both ends in the line direction are open. The peripheral wall 26a of the insulator accommodating portion 23a is also formed with a notch at a portion where the electric wire accommodating portion 24a continues,
The accommodation spaces 34a and 35a are connected to each other.

The other electric wire accommodating portion 25a is
3a at an intermediate portion in the axial direction and at the other end in the circumferential direction, and the insulator housing portion 23 along the axis L2a.
a. Therefore, each wire housing 2
4a and 25a protrude to the opposite side with respect to the insulator accommodating portion 23a. The wire housing portion 25a is formed in a semi-cylindrical shape having the axis L2a as an axis, and the wire housing space 36a formed therein is opened at almost the same open end face as the insulator housing space 34a, and both ends in the wire direction are open. are doing. The peripheral wall 26a of the insulator accommodating portion 23a is also formed with a notch at a portion where the electric wire accommodating portion 25a is continuous.
36a are mutually connected.

The joining pieces 18a and 19a have substantially rectangular parallelepiped bases 40a and 41a, respectively, and are formed to protrude from one end wall 27a of the insulator accommodating portion 23a to the outside of the insulator accommodating portion 23a. . Each of the bonding pieces 20a, 21a has a substantially rectangular parallelepiped base 42a, 43a, and is formed to protrude from the other end wall 28a of the insulator accommodating portion 23a to the outside of the insulator accommodating portion 23a. Each of the pieces 18a and 19a
In the circumferential direction around the axis L1a, one end wall 27a
Are provided on both ends in the circumferential direction and on the same circumference with respect to the axis L1a. The joint pieces 20a and 21a are provided at both ends in the circumferential direction of the other end wall 28a in the circumferential direction around the axis L1a, and on the same circumference with respect to the axis L1a. Each of the attachment pieces 18a to 21a is provided at the open end side end of the cover body 17a along the open end face, and thus along a plane including the axes L1a and L2a. Further, the respective joining pieces 18a and 20a are arranged on a straight line parallel to the axis L1a, and the respective joining pieces 19a and 20a are arranged.
21a is arranged on another straight line parallel to the axis L1a.

Each bonding piece 18a, 21a is connected to each base 40
Locking projections 45a and 46a projecting from the substantially central portions of the a and 43a and perpendicular to the respective axis lines L1a and L2a and projecting toward the upper open end in FIG. 3 are formed. Each locking projection 4
Reference numerals 5a and 46a each include a base end portion connected to the base portions 40a and 43a and a front end portion connected thereto. The base end portion has a cylindrical shape, and the front end portion has a tapered frustoconical shape. It is. The distal end portion is split into two pieces, and can be elastically deformed so as to reduce the diameter. The portion closest to the proximal end portion has a larger diameter than the proximal end portion.

The joining pieces 19a and 20a are connected to the respective bases 41a and 41a.
Engaging holes 47a, 48a extending in a direction perpendicular to the axes L1a, L2a are formed substantially at the center of the hole 42a. Each locking hole 47a, 48a has at least bases 41a, 42a.
At the open end side of the cover body 17a at
In the present embodiment, it penetrates through bases 41a and 42a. Each of the locking holes 47a and 48a is connected to a cylindrical small-diameter portion arranged on the open end side, with a step on the side opposite to the open end of the small-diameter portion, and has a cylindrical inner diameter larger than the small-diameter portion. It has a large diameter portion.

The shape of each locking projection 45a, 46a formed on each of the bonding pieces 18a, 21a is
locking holes 47a, 48a respectively formed in a, 20a
Then, the distal end portion is resiliently deformed and inserted, and the distal end portion recovered to the non-deformed state by the elastic recovery force can be locked to the step portion facing each of the locking holes 47a, 48a. Shape. An engagement projection 45a is formed on the joining pieces formed at positions symmetrical with respect to a plane including the axis L1a and perpendicular to the axis L2a, and thus on one of the joining pieces 18a, 19a. A locking hole 47a is formed in the other joining piece 19a.
An engagement projection 46a is formed on one of the attachment pieces 21a of the first and second attachment pieces 21a, and an engagement hole 48a is formed on the other attachment piece 20a.

Referring to FIG. 1 to FIG. 5, one of the divided bodies 4a having the respective joining pieces 18a to 21a and the other divided body 4b having the same configuration as the divided body 4a are as follows.
The pieces are joined together by the joining pieces 18a to 21a and 18b to 21b. Specifically, in each of the divided bodies 4a and 4b, the axes L1a and L1b coincide with each other, and further, the axes L1a and L1
1b, the respective joining pieces 18a, 19b and the respective joining pieces 19 are arranged in a state where the respective one end walls 27a and 27b are arranged at the same position and the respective other end walls 28a and 28b are arranged at the same position.
a, 18b, each piece 20a, 21b and each piece 2
1a and 20b face each other. A locking projection is formed on one of the joining pieces opposing each other in this way, and a locking hole is formed on the other, and each locking projection is inserted into each locking hole to form a locking hole. Can be locked to the part facing
Thus, the divided bodies 4a and 4b are joined.

In the state where the divided bodies 4a and 4b are attached to each other, the substantially short columnar space formed by the insulator accommodating spaces 34a and 34b is notched by the notches 30a and 3b.
0b and the notches 31a. A circular drain hole 16 formed by 31b is open on both sides in a direction coinciding with the axes L1a and L1b.

The generally cylindrical space formed by the electric wire accommodating spaces 35a and 36b communicates on one side with the space formed by the insulator accommodating spaces 34a and 34b and opens to the outside on the other side. ing. The generally cylindrical space formed by the electric wire housing spaces 36a and 35b communicates on one side with the space formed by the insulator housing spaces 34a and 34b, and is open to the outside on the other side.

When the divided bodies 4a and 4b are assembled as described above, the opposing ends 7a to 10a and 7b to 10b are in a state where they abut each other. Referring again to FIGS. 2 to 5, divided body 4a has four opposed ends 7a to 10a. The opposing end 7a extends from one end in the circumferential direction of the end wall 27a, through a portion of the end in the circumferential direction of the peripheral wall 26a closer to the end wall 27a, and to one end in the circumferential direction closer to the end wall 27a of the wire housing 24a. It is formed to extend. The opposing end 8a extends from the other end in the circumferential direction of the end wall 27a to the other end in the circumferential direction of the peripheral wall 26a near the end wall 27a, and then to one end in the circumferential direction closer to the end wall 27a of the wire housing 25a. It is formed to extend to the part. The opposite end 9a is formed from one end in the circumferential direction of the end wall 28a.
It is formed so as to extend from a portion of the peripheral wall 26a in the circumferential direction near the end wall 28a to one end in the circumferential direction near the end wall 28a of the electric wire accommodating portion 24a. The opposing end 10a is the end wall 2
The wire 8a is formed so as to extend from the other end in the circumferential direction to the other end in the circumferential direction of the peripheral wall 26a near the end wall 28a and to one end in the circumferential direction closer to the end wall 28a of the wire housing 25a.

Each of the opposed ends 7a, 10a protrudes perpendicularly to the open end face from the center in the thickness direction.
A ridge 12a extending over the entire area of 10a is formed. A concave groove 13a is formed in each of the opposed ends 8a, 8a so as to extend over the entire area of each of the opposed ends 8a, 9a, being sandwiched between ridges projecting perpendicularly to the open end face from both ends in the thickness direction.

The shape of the ridge 12a formed on each of the opposed ends 7a and 10a is such that it can fit into the concave groove 13a formed on each of the opposed ends 8a and 9a. Opposing ends formed at positions symmetrical with respect to a plane including the axis L1a and perpendicular to the axis L2a,
Therefore, one opposing end 7a of each opposing end 7a, 8a
Is formed with a ridge 12a, the other opposing end 8a is formed with a concave groove 13a, and one opposing end 9a of each opposing end 9a, 10a is formed with a ridge 12a. A concave groove 13a is formed in the opposite end 10a.

Referring to FIGS. 1 to 5, the axes L1a and L1b coincide with each other as described above, and the axes L1a and L1
b, each of the opposed end portions 7a and 8b and each of the opposed end portions 8 are arranged in a state where the one end walls 27a and 27b are arranged at the same position and the other end walls 28a and 28b are arranged at the same position.
a, 7b, each opposing end 9a, 10b and each opposing end 1
0a and 9b face each other. In this manner, a ridge is formed on one of the opposed ends facing each other, and a groove is formed on the other, and each ridge can be fitted into each groove, and in this state, The divided bodies 4a and 4b are joined together.

In the state where the divided bodies 4a and 4b are attached to each other, the substantially short columnar space formed by the insulator accommodating spaces 34a and 34b is notched by the notches 30a and 3b.
Ob is open on both sides in the direction coinciding with the axes L1a and L1b by a circular exposure hole 50 formed by Ob and a circular drainage hole 16 formed by notches 31a and 31b. In addition, each electric wire accommodation space 35a, 36
The substantially cylindrical space formed by b communicates on one side with the space formed by the insulator accommodating spaces 34a and 34b, and opens to the outside on the other side. The generally cylindrical space formed by the electric wire accommodating spaces 36a and 35b is provided on one side with the insulator accommodating spaces 34a and 35b.
While communicating with the space formed by 34b, it is open to the outside on the other side.

Referring to FIGS. 2 to 5, the wire housing portion 24a of the divided body 4a is disposed at the end on the side away from the insulator housing portion 23a and below when the suspension insulator cover 1 is mounted. A locking claw 5 protruding outward at the other end in the circumferential direction
1a is formed. In addition, the wire housing 25a of the divided body 4a
A locking arm 52a protruding outward is formed at an end on the side away from the insulator accommodating portion 23a and at the other end in the circumferential direction on the side disposed below when the suspension insulator cover 1 is mounted. You. The shape of the locking claw 51a is a shape that can lock the locking arm 52a. The locking claw 51a and the locking arm 52a are aligned with the axis L
1a and is formed at a position symmetrical with respect to a plane perpendicular to the axis L2a.

Referring to FIGS. 1 to 5, the axes L1a and L1b coincide with each other as described above, and the axes L1a and L1
With regard to b, the locking claw 51a and the locking arm 52b can be locked in a state where the one end walls 27a and 27b are arranged at the same position and the other end walls 28a and 28b are arranged at the same position. The locking claw 51b and the locking arm 52a are provided at a position where they can be locked. With the divided bodies 4a and 4b attached to each other, the locking claw 51a and the locking arm 52b are locked, and the locking claw 51b and the locking arm 52a are locked.

Referring to FIG. 2 to FIG.
a to 21a, that is, the end of the cover body 17a on the side away from the insulator accommodating portion 23a,
a, 56a, 57a, and 58a are respectively formed. Each of the engaging pieces 55a to 58a is connected to each of the joining pieces 18a to 21.
a is formed at a position closer to the right side when viewed from the front side with the front end positioned upward.

Referring to FIGS. 1 to 5, the axes L1a and L1b coincide with each other as described above, and the axes L1a and L1
With respect to b, the engaging pieces formed on the mutually opposing joining pieces in a state where the one end walls 27a and 27b are arranged at the same position and the other end walls 28a and 28b are arranged at the same position. Therefore, each engaging piece 55a, 56
b, each engaging piece 56a, 55b, each engaging piece 57a, 58b
And each engaging piece 57b, 58a is connected to each axis L1a, L2.
a; displaced along one surface including L1b and L2b. Therefore, in a state where the divided bodies 4a and 4b are attached to each other, a finger and a tool or the like are engaged with each of the engagement pieces facing each other to separate the mutually facing attachment pieces from each other. The union state can be easily released.

Referring to FIG. 5, a plurality of ribs 60a are formed in divided body 4a in insulator accommodating portion 23a at intervals in the direction of axis L2a. Each rib 60a has an axis L2
Along the plane perpendicular to a, it protrudes into the insulator accommodating space 34a, and is formed from one end wall 27a to a portion near the end wall of the peripheral wall 26a. That is, the plurality of ribs 60a
The cover main body 17a is erected on the back side of the shoulder 5a at a distance from each other along a substantially vertical direction.

Referring to FIGS. 2 to 5, divided body 4a
Has an engagement protrusion 61a that protrudes outward at a distal end of the electric wire housing 24a on the side away from the insulator housing 23a. The engaging projection 61a is formed so as to extend in the circumferential direction at a portion near one end in the circumferential direction, which is upward at the time of mounting. An engagement protrusion 62a that protrudes outward is formed at a distal end of the wire housing 25a that is away from the insulator housing 23a. The engaging projection 62a is formed so as to extend in the circumferential direction at a portion near one end in the circumferential direction, which is upward at the time of mounting. With the divided bodies 4a and 4b joined together,
The engagement protrusions 61a and 62b extend in a circumferential direction about half a circumference so as to be continuous, and the engagement protrusions 61b and 62a extend in a circumferential direction about a half circumference in a continuous manner.

FIG. 6 is a side view showing the vicinity where the suspension insulator 3 is provided in order to explain the place where the suspension insulator cover 1 is mounted. The electric railway vehicle contacts the trolley wire 65 by contacting the current collector provided on the roof with the trolley wire 65.
Power is supplied from the vehicle. This trolley wire 65
In order to construct the rails, columns are provided on at least one side of a rail (rail) on which the electric railway vehicle travels, in this embodiment, on both sides. The columns are provided in pairs so as to face each other across the rail, and a plurality of pairs are provided at intervals in the direction in which the rail extends. A support arm 66 is provided above a traveling region in which the electric railway vehicle travels, over a pair of columns of such a plurality of columns. The support arm 66 is configured by assembling a plurality of SS400 steel materials in a truss shape, for example. The suspension insulator 3 is provided below the support arm 66. The suspension insulator 3 is connected to another suspension insulator 67 of a similar configuration fixed to the support arm 66 and provided below the suspension insulator 67.

The suspension insulator 3 suspends an overhead electric wire 2 (extending in the direction perpendicular to the paper of FIG. 6) extending substantially in the same direction as the rail below, and further connects an inverted V-shaped connecting body 68 further downward. Hanging. The support arm 66 is provided with a V-shaped mounting body 69 below a position separated from the suspension insulators 3 and 67. One end of a support rod 71 is attached to the attachment body 69 via an insulator 70 made of an electrically insulating material. The support rod 71 extends substantially horizontally so as to pass below the suspension insulators 3, 67, and is supported by the suspension insulator 3 via the connecting body 68 described above. Further, the support rod 71
A bending metal fitting 72 is attached to the lower side, and a trolley wire 65 (extending in the direction perpendicular to the paper surface in FIG. 6) is supported at the distal end thereof. In other words, the suspension insulator 3 suspends the overhead electric wire 2 below, and further supports the trolley wire 65 further below the overhead electric wire 2 via the support members (the coupling body 68, the support rod 71, and the bending metal fitting 72). Hanging.

The same potential is applied to the overhead electric wire 2 and the trolley wire 65 by a power source (not shown). In order to supply electric power to the electric railway vehicle via trolley wire 65, trolley wire 65 is electrically connected to a power source, for example, to provide a DC potential 1500 V higher than the ground potential. Are connected to the overhead electric wire 2 by using a conductive wire so that the overhead electric wire 2 has the same electric potential. Thus, when the above potential is applied only to the trolley wire 65, it is possible to prevent the overhead wire 2 from being easily corroded due to a potential difference between the overhead wire 2 and the trolley wire 65.

The suspension insulator cover 1 is mounted on the suspension insulator 3. This suspension insulator cover 1 is, for example,
6, repainting, etc., overhead wire 2 and trolley wire 65
When repairing a structure to build a building,
It is mounted so as to enclose the suspension insulator 3. Thus, it is possible to prevent a tool or the like from coming into contact with the portion of the overhead electric wire 2 near the suspension insulator 3 during the above repair work.

This suspension insulator cover 1 has the shoulder 5 (the shoulders 5a, 5b of the divided bodies 4a, 4b) with the suspension insulator 3 wrapped around.
5b) is supported by the suspension insulator 3 by being hooked on the suspension insulator 3. At this time, since a plurality of ribs 60a and 60b are provided on the back side of the shoulder portion 5, these ribs 60a and 60b are provided. And the upper surface of the insulator main body 81 of the suspension insulator 3 comes into contact. That is, the back surface of the shoulder 5 and the insulator body 81
There is no direct contact with the upper surface of the. Further, a plurality of ribs 60a,
A drain route (indicated by a dotted arrow in FIG. 5) is formed to reach the drain hole 16 through the space between 60b.

The suspension insulator cover 1 of the overhead electric wire 2
An electric wire cover 75 (shown in FIG. 10), which will be described later, is attached to the portions exposed from both left and right sides of the vehicle. Wrapped and protected. Thus, it is possible to prevent the tool from contacting not only a portion of the overhead electric wire 2 near the suspension insulator 3 but also a portion to which a potential is applied similarly to other overhead electric wires 2. Here, the connecting body 68
Is formed by assembling a bar-shaped steel material in an inverted V-shape and can be easily wrapped by a protective sheet.

FIG. 7 is a front view showing the suspension insulator 3,
FIG. 8 is a left side view showing the suspension insulator 3, and FIG. 9 is a bottom view showing the suspension insulator 3. The suspension insulator 3 includes a mounting portion 80 made of, for example, cast iron, and an insulator main body 8 made of an electrically insulating material fixed to a lower portion of the mounting portion 80, for example, a magnet.
1 and a holding portion 82 fixed to a lower portion of the insulator main body 81. The mounting portion 80 is formed in a generally bell-shaped shape, and has a mounting piece 86 in which a mounting hole 85 is formed at an upper portion. The insulator main body 81 has a generally dish-like shape protruding upward, and has an insertion portion 87 at the upper center.
Is inserted into the mounting portion 80 and is fixed to a lower portion of the mounting portion 80.

The holding portion 82 includes a pair of hanging metal members 89, a pair of supporting metal members 91, a pair of supporting wheels 93, and the hanging metal members 9.
5 is included. The respective hanging brackets 89 are fixed to the lower central portion of the insulator main body 81 while being separated from each other. Each support bracket 91
With fasteners 90 comprising bolts and nuts,
It is provided so that the hanging metal fitting 89 may be sandwiched from both sides in the separating direction. Each support metal 91 extends in a substantially horizontal direction that intersects the direction in which the hanging metal parts 89 are separated from each other, and both ends in the longitudinal direction project from both sides of each hanging metal part 89. Each support wheel 93 extends in the circumferential direction at the outer peripheral portion, and has a semicircular concave groove 10 whose cross-sectional shape is concave inward in the radial direction.
0 is formed. Each support wheel 93 is provided with a respective support fitting 91.
Are provided between the support fittings 91 at both ends in the longitudinal direction, and are provided on the support fittings 91 by support shaft means 94 including bolts and nuts connected to the support fittings 91. Each support wheel 93 is rotatable about a substantially horizontal axis that is parallel to the direction in which the hanging hardware 89 separates.

The suspension insulator 3 includes a hanging metal fitting 95 attached to a lower portion of the holding portion 82. The hanging bracket 95 is
A connection fitting 98 is fixed to a mounting bracket 97 provided between the support wheels 93 and between the support brackets 92, and below the mounting bracket 97. The connection fitting 98 has an inverted U-shape that opens downward, and other members can be connected by fastening means 99 including bolts and nuts.

The suspension insulator 3 is attached to the mounting piece 8 of the mounting portion 80.
6 is provided with another suspension insulator 67.
It is fixed to the lower part of another suspension insulator 67 by inserting a bolt in common with the above. The suspension insulator 3 fixed in this manner inserts the hanging electric wire 2 between the respective hanging fittings 89 of the holding portion 82 and fits into the concave groove 100 of each supporting wheel 93, and the overhead electric wire 2 is moved by the respective supporting wheels 93. The overhead electric wire 2 can be hung so that it is supported from below and holds the overhead electric wire 2. The suspension insulator cover 1 is attached to the suspension insulator 3.

FIG. 10 is a view showing the electric wire cover 75, FIG. 10 (1) is a left side view of the electric wire cover 75, FIG. 10 (2) is a front view of the electric wire cover 75,
FIG. 10C is a right side view of the electric wire cover 75. The electric wire cover 75 is made of a synthetic resin or the like that is an electrically insulating material, has a substantially cylindrical shape, and is divided at one location in the circumferential direction. The electric wire cover 75 can be attached to the overhead electric wire 2 by separating both ends in the circumferential direction, allowing the overhead electric wire 2 to enter inside from between the separated both ends in the circumferential direction. In this state, both ends in the circumferential direction abut against each other and are closed.

The axial end 110 of the electric wire cover 75 has a larger diameter than the axial end 111. At one end 110 in the axial direction, an engagement recess 112 whose inner periphery is depressed outward in the radial direction is formed at a position closer to the other end 111 in the axial direction from the end face in the axial direction. The engagement concave portion 112 is formed at a middle portion in the circumferential direction over about half a circumference. At the other end portion 11 in the axial direction, an engagement convex portion 113 is formed at a position closer to the one end portion 110 in the axial direction from the end face in the axial direction. The engaging projection 113 is formed at a middle part in the circumferential direction over about a half circumference.

When a plurality of electric wire covers 75 are mounted on the overhead electric wire 2, the other end 111 in the axial direction of the two electric wire covers 75 adjacent to each other is connected to the other axial line of the two electric wire covers 75. Direction one end 110 can be inserted. At this time, the engaging protrusion 113 formed on the other end 111 in the axial direction can be fitted into the engaging recess 112 on the one end 110 in the axial direction, and can be engaged with each other and connected.

FIG. 11 is a diagram for explaining a procedure for mounting the suspension insulator cover 1. First, as step 1, FIG.
As shown in FIG. 1 (1), the other divided body 4b is applied to the suspension insulator 3 with the end wall 27b arranged upward.
At this time, the insulator main body 81 and the holding portion 82 are fitted into the insulator accommodating portion 23b about halfway, and the overhead electric wire 2 is about half in the insulator accommodating portion 23b in addition to the electric wire accommodating portions 24b and 25b. I'm stuck. Also the mounting part 8
No. 0 is fitted into the insulator accommodating portion 23b in a state of partially projecting upward from the notch 30b, and
Is partially projected downward from the notch 31b,
It fits in the insulator accommodating portion 23b.

Next, as step 2, as shown in FIG. 11 (2), one of the divided bodies 4 a is applied to the suspension insulator 3 with the end wall 27 a disposed above. In this state, the suspension insulator 3 and the overhead electric wire 2 are partially fitted into the divided body 4a as well as the divided body 4b. After being applied in this manner, each divided body 4a, 4b
Are bonded by the respective bonding pieces 18a to 21a and 18b to 21b. At this time, the ridges 12a and 12b fit into the concave grooves 13a and 13b, and
a and 51b are locked by the locking arms 52a and 52b. In this way, the divided bodies 4a and 4b are joined together,
The suspension insulator cover 1 is mounted on the suspension insulator 3.

The suspension insulator 1 has an exposed hole 50 formed in the upper part, and the mounting portion 80 is mounted so as to partially expose the mounting portion 80 from the exposed hole 50, and is provided on the back side of the shoulder portion 5. Since the plurality of ribs 60a and 60b are supported on the suspension insulator 3 by being hooked on the upper surface of the insulator main body 81, the back surface of the shoulder portion 5 does not directly contact the upper surface of the insulator main body 81. In addition, the suspension insulator cover 1 has a drain hole 16 formed in the lower portion, and it is possible to mount the hanging bracket 95 by partially projecting the drain hole 16 by using the drain hole 16 as described above. In the state where the connecting body 68 is hung by the hanging metal fitting 95, the suspension insulator 3 is attached to the suspension insulator 3.
Can be attached.

Thereafter, the electric wire covers 75 (see FIG. 10) are mounted on both sides of the suspension insulator cover 1 at portions of the overhead electric wire 2 protruding from the suspension insulator cover 1. Each of the electric wire covers 75 is mounted with the one end 110 in the axial direction positioned near the suspension insulator cover 1 and mounted.
25b and the respective wire housings 24b, 25a
Consists of one end 11 of the wire cover 75 in the axial direction.
It has a smaller diameter than zero and can be inserted into its one end 110 in the axial direction. In this state, each engaging projection 61a,
62a, 61b, 62b are engaged with the respective engaging recesses 112, and the suspension insulator cover 1 and the respective electric wire covers 75 are connected.

According to the suspension insulator 1 of the present embodiment, each of the divided bodies 4a and 4b has the opposed ends 7a to 1a.
The suspension insulator cover 1 is attached to the suspension insulator 3 so as to cover at least the wire suspension portion of the suspension insulator 3 and the overhead wire portion near the suspension insulator 3. Be attached. Here, the wire suspension portion of the suspension insulator 3 is constituted by the insulator main body 81 and the holding portion 82. The attachment of the suspension insulator 1 to the suspension insulator 3 is as follows.
It is only necessary to arrange the divided bodies 4a and 4b at predetermined positions with respect to the suspension insulator 3 and to attach them to each other, so that the mounting operation is easy and the mounting can be performed in a fixed state. Each divided body 4
a, 4b, each of the pieces 18a to 21a, 18b to
Reference numeral 21b denotes a locking means called a so-called snap fit or the like, specifically, each locking projection 45a, 46.
a, 45b, 46b into the locking holes 47a, 48a, 47b,
48b can be joined by a simple operation of merely inserting and locking, and can be joined manually by an operator or remotely by using a tool, and the joined state is constant. State. By mounting the suspension insulator cover 1 on the suspension insulator 3 in this way, the suspension insulator 3 and the overhead electric wire portion in the vicinity thereof can be protected. In addition, it has engaging pieces 55a to 58a and 55b to 58b, and the joined state can be easily released by manual operation and remote operation using a tool.

Further, in a state where the divided bodies 4a and 4b are attached to each other, and thus the suspension insulator cover 1 is mounted on the suspension insulator 3, the ridges 12a and 12b are fitted to the concave grooves 13a and 13b. I'm stuck. Therefore, the creepage distance between the outer surface and the inner surface of the suspension insulator cover 1 at the abutting portion of each of the divided bodies 4a and 4b can be increased. Therefore, the electric resistance can be increased, the electric insulation can be increased, the short circuit accident can be prevented more reliably, and the safety can be improved.

The suspension insulator cover 1 has a drain hole 16 formed in a lower part in the mounted state, and a plurality of ribs 60 a, Drain hole 1 between 60b
6 is formed (shown by a dotted arrow in FIG. 5), so that rainwater that has entered the inside of the suspension insulator 1 from the exposed hole 50 through the space between the ribs 60a and 60b is drained from the drain hole 16 Is smoothly guided to the outside. For this reason, there is no possibility that rainwater will accumulate inside the suspension insulator cover 1.

Further, the suspension insulator cover 1 includes
a and 4b have inclined portions 32a and 32b, and water that has entered inside due to rainfall or the like is guided toward the drain hole 16. Therefore, the water that has entered the inside can be quickly and reliably discharged from the drain hole 16.

Further, the suspension insulator cover 1 comprises a plurality of ribs 60a, 60b erected on the back side of the shoulder portion 5 and the suspension insulator 3.
The upper surface of the insulator body 81 contacts the shoulder 5 and the insulator body 8.
1, a gap is not formed between the shoulder 5 and the insulator body 81 so that the contact portion does not form a circular closed loop. There is no danger of accumulation.

As described above, even if the suspension insulator cover 1 is exposed to rainwater, it is possible to prevent rainwater from accumulating inside. Therefore, it is possible to prevent a decrease in electric resistance due to accumulation of rainwater, enhance electric insulation, more reliably prevent a short circuit accident or the like, and improve safety.

The drain hole 16 is intended to drain the water, and the hanging bracket 95 can be partially projected downward by using the drain hole 16 for the drain water. Accordingly, it is possible to suitably attach to the suspension insulator 3 that suspends the connecting body 68 as described above.

Further, since water does not accumulate in the interior, the gravity of water does not act as a force for separating the divided bodies 4a and 4b from each other as in the prior art, and the combined state is reliably maintained. You. Also, as in the present invention, each of the coalescing pieces 18a-
By appropriately selecting the shapes and arrangements of the projections 12a, 12b, the grooves 13a, 13b, etc., the divided bodies 4a, 4a to be attached to each other are appropriately selected.
Since b can have the same shape and can be molded with one mold, it can be easily manufactured.

As an embodiment of the present invention, one set of four sets of bonding pieces facing each other, for example, each bonding piece 18
a and 19b may be connected by a rubber band 115 shown by a virtual line in FIG. Thus, the suspension insulator cover 1 can be opened and closed by displacing each of the divided bodies 4a and 4b with each of the joint pieces 18a and 19b as a fulcrum. Thereby, it is possible to prevent the divided bodies 4a and 4b from being completely separated, and to facilitate the handling.

The connecting means for connecting the divided bodies 4a and 4b so as to be openable and closable is a rubber band 1 as described above.
It is not limited to fifteen. As another embodiment of the present invention, for example, a connecting arm 1 as shown by a virtual line in FIG.
16 is formed over one joining piece of one divided body 4a, for example, the joining piece 18a and the cover body 17a, and the joining piece 19b of the other divided body 4b and the cover body 1 are formed.
7b, the connecting arm is formed so as to face the connecting arm 116 of one of the divided bodies 4a.
6 may be connected by a cord or the like such as a string. Such connecting means is also provided in each of the divided bodies 4a, 4b.
Can be opened and closed.

The position of connection by each of the above-mentioned connecting means is not limited to the above-mentioned position, but may be connected in connection with another joining piece. FIG. 12 is a perspective view showing the attachment pieces 150 and 151 according to still another embodiment of the present invention. Cover body 17a, 17b as described above
The joint pieces 150 and 151 may be provided instead of the joint pieces 18a to 21a and 18b to 21b. A bonding piece 150 in which a locking hole 155 is formed in one of the cover bodies 17a and 17b, for example, the cover body 17a.
Are provided so as to be freely angularly displaceable, and the other cover body 17 is provided.
A bonding piece 151 having a hook-shaped portion 156 is provided at b. By providing each of the bonding pieces 150 and 151, the bonding piece 150 is angularly displaced, and the bonding pieces 15 are inserted into the locking holes 155.
1, the hook-shaped portions 156 are locked to the peripheral edge of the locking hole 155 of the bonding piece 150 and are locked to each other, whereby the divided bodies can be bonded to each other. Even with such luting pieces 150 and 151, each of the lubricating pieces 18 described above may be used.
The same effects as those of a to 21a and 18b to 21b can be achieved.

The above embodiment is merely an example of the present invention, and it is possible to change the shape and material within the scope of the present invention. For example, a configuration in which three or more divided bodies are joined together may be adopted. Further, two or more protrusions and grooves may be formed at the opposite end.
Alternatively, the suspension insulator cover 1 may be attached to a suspension insulator that suspends only one overhead electric wire below. Further, the suspension insulator cover 1 may be used not only during the above-described repair work, but also for a long period of time such as being always worn. In such a case, it is highly likely that the subject will be exposed to rainfall. However, in the present invention, the above-described effects can be achieved. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a suspension insulator cover of the present embodiment.

FIG. 2 is a front view showing a divided body.

FIG. 3 is a plan view showing a divided body.

FIG. 4 is a right side view showing a divided body.

FIG. 5 is a rear view showing a divided body.

FIG. 6 is a side view showing a vicinity where a suspension insulator is provided in order to explain a mounting place of the suspension insulator cover.

FIG. 7 is a front view showing a suspension insulator.

FIG. 8 is a left side view showing the suspension insulator.

FIG. 9 is a bottom view showing the suspension insulator.

FIG. 10 is a view showing an electric wire cover, wherein (1) is a left side view, (2) is a front view, and (3) is a right side view.

FIG. 11 is a diagram for explaining a procedure for mounting a suspension insulator cover.

FIG. 12 is a perspective view showing a bonding piece according to still another embodiment of the present invention.

[Explanation of symbols]

1 ... suspension insulator cover 2 ... overhead electric wire 3 ...
Suspension insulator, 4a: divided body, 4b: divided body, 16
... water draining hole, 32a ... inclined part, 50 ... exposed hole, 65 ... trolley wire, 66 ... support arm, 68
... Connecting body, 69 ... Mounting body, 71 ... Support rod,
72. Music trigger.

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor, Yoshiharu Inaba, 4 Kurokanamachi, Shizuoka City, Shizuoka Prefecture Tokai Passenger Railway Shizuoka Branch Office (72) Inventor, Akio Shirahama 3-28-8 Izumi, Higashi-ku, Nagoya City, Aichi Prefecture Inside Nagoya Branch Co., Ltd. (72) Inventor Koichi Inoue Yotsugi Co., Ltd. 4-5-1-21, Noribori, Nishi-ku, Osaka-shi, Osaka

Claims (4)

[Claims] 1. An electrically insulating suspension insulator cover which is detachably attached to a suspension insulator and which is supported by the suspension insulator by a back surface of a shoulder hooked on the suspension insulator in a state where the suspension insulator is wrapped. An exposure hole provided on the upper surface and partially exposing the upper part of the suspension insulator; a drain hole provided on the lower surface for discharging water accumulated inside to the outside; and a standing hole on the back side of the shoulder portion. A suspension insulator cover comprising: a plurality of ribs in contact with an upper portion of the suspension insulator; and a drainage path extending from the exposure hole to a drain hole through a space between the plurality of ribs. 2. The suspension insulator cover according to claim 1, wherein said plurality of ribs have a shape extending substantially vertically. 3. The suspension insulator cover according to claim 1, further comprising an inclined surface inclined downward toward the drain hole. 4. A shape that is used to wrap a suspension insulator that suspends an overhead electric wire below and also suspends a trolley wire below the overhead electric wire via a support member, and is vertically divided into two parts. The suspension insulator according to any one of claims 1 to 3, wherein a pair of divided bodies having the following are attached to each other, and the drain hole is attached to the suspension insulator in a state where the support member is inserted. cover.