JP3090871B2 - Insulated terminal cover for distribution line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulated terminal cover which is fitted to and detached from a retaining terminal of a distribution line.

[0002]

2. Description of the Related Art Conventionally, distribution line construction has been performed mainly by hand, so that the power distribution in the construction section has been cut off. However, with the diversification of the use of electricity and the development of advanced information technology, there is a strong demand for a reduction in work power outages. In response to the demand, a live-line construction method in which construction is performed while power is supplied has been used. There are two types of hot-line construction methods: direct hot-line construction, in which workers attach protective equipment and work while directly touching current-carrying parts, and indirect hot-line construction, in which work is performed using auxiliary equipment. The cutting and connecting method of the edging line accompanying the switchgear work is being changed to the live line method.

[0003] As auxiliary equipment used in the indirect hot-line construction method, for example, an indirect hot-line tool hanging arm which is attached to a sub-boom of an aerial work vehicle and smoothly handles a tool at a predetermined position by a winch operation, or an aerial work vehicle bucket Use an indirect live tool support that is attached to the edge and temporarily supports a tool such as a rotary stick, and as a tool for live wire, for example, marking tools for hydraulic cutters, adapters for stripping tools at wire ends, brush tools, for hydraulic compressors A die or the like is used. Further, a terminal cover C is fitted into the cut portion of the wrapping line and the retaining terminal of the distribution line as shown in FIG. 12, and the cover C is fixed by winding an adhesive tape T thereon.

[0004]

In the direct hot-line method in which a worker attaches protective equipment and works while directly touching a current-carrying part, the flexibility of the protective equipment decreases when the outside air temperature decreases. There was a problem that the efficiency was reduced, and there was also a problem with danger even when wearing protective equipment. In the indirect hot-line construction method using auxiliary equipment and hot-line tools, if a cutter is attached to the tip of the hot stick, there is a problem that the work becomes heavy and extremely difficult. There was also a problem of contact with electric wires and arms. In particular, in order to fit the terminal cover to the cut part of the edging line or the retaining terminal in the indirect hot-line construction method, there was a problem that a high level of skill was required in handling auxiliary equipment and hot-line tools.

Various types of terminal covers are formed according to the thickness of the distribution line (a state in which a core wire having a diameter of 5 mmφ and a cross-sectional area of 150 mm ² is covered), and a terminal cover according to the distribution line thickness is selected from among them. After fitting, they are fixed by taping. However, the work is complicated and there is a problem that it is very difficult to perform taping by the indirect hot-line method. Then, this invention was made in view of such a problem which a prior art has, and the place of the object can be used irrespective of the thickness of a distribution line,
In addition, an object of the present invention is to provide an insulated terminal cover for a distribution line that can be easily inserted and removed by an indirect live tool.

[0006]

In order to achieve the above-mentioned object, an insulated terminal cover for a distribution line according to the present invention is, as a first aspect, a cap which can be grasped by an indirect hot-line tool and fits inside the cap. With a locking body with excellent elasticity, between the entrance of the peripheral wall and the inner part of the peripheral wall, support pieces protruding from the peripheral wall toward the center of the peripheral wall are formed at appropriate intervals, and from the entrance to the inner part An insertion portion of a distribution line terminal having a gradually decreasing diameter is formed on the inner periphery of each supporting piece that extends. According to a second aspect of the present invention, in the insulated terminal cover for a distribution line according to the first aspect, the locking body comprises a first separation locking material and a second separation locking material divided into two along the center line. It is formed by joining a stop material. According to a third aspect of the present invention, in the insulated terminal cover for a distribution line according to the first and second aspects, the cap has a storage chamber therein, and is provided with a tapered tapered portion and a tubular portion continuously from the body to the tip end side. A drain hole is provided between the storage room. According to a fourth aspect of the present invention, in the insulated terminal cover for a distribution line according to the first, second, or third aspect, the cap is provided with a locking opening in the body, and the locking body is integrated with the cap by locking means engaging with the locking opening. Become a target.

Here, the cap is formed of an insulating synthetic resin having excellent withstand voltage and weather resistance, and is grasped by an indirect hot wire tool.
Or, the one that does not deform even when pinched, the drain hole of the cap refers to the one that allows the discharge of rainwater that has entered the cap, and the cylinder part of the cap communicates with the storage chamber through the drain hole. The water discharge position is kept away from the drain hole. Here, the locking body is formed of an insulating synthetic resin having excellent withstand voltage and elasticity, and has a support piece on its inner periphery that allows the terminal of the distribution line to be inserted. It refers to the one obtained by joining divided split locking members facing each other, and the one obtained by integrally forming the split locking portions divided into two along the center line on the left and right of the flexible piece. This means that the projecting portion projects from the peripheral wall toward the center of the peripheral wall, and the insertion portion of the insulated terminal for distribution lines is formed to have a gradually decreasing diameter from the entrance to the back. Here, the locking means refers to a means that engages with the locking opening of the cap and integrates the cap and the locking body, and refers to a locking claw or the like provided on the locking body. Here, the indirect hot-line tool is a tool used in an aerial work vehicle in distribution line construction by the indirect hot-line method, and refers to, for example, a hot stick or a robot arm (also referred to as a manipulator).

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment of an insulated terminal cover for a distribution line according to the present invention will be described with reference to FIGS. The cap 1 has a highly elastic locking body 20 that fits inside the cap 1. The cap 1 has a storage chamber 2 for the locking body 20 inside, a non-slip 5 outside, and a locking port 6 on the entrance side. And an opening 3 which is one size larger than the storage chamber 2, and the locking body 20 is provided on the peripheral wall 21, an annular projection 24 fitted to the opening 3, and a locking engagement with the locking opening 6. With a claw 27,
Support pieces 22 protruding from the peripheral wall 21 toward the center of the peripheral wall are formed at appropriate intervals from the entrance of the peripheral wall 21 to the inner part thereof,
Distribution line terminals p are provided on the inner periphery of each support piece 22 from the entrance to the back.
The cap 1 and the locking body 20 are integrated with each other by the locking claw 27 and the locking means 7 of the locking opening 6.

Next, a second embodiment of the insulated terminal cover for a distribution line according to the present invention will be described in terms of differences from the first embodiment. The locking member 20 is positioned at the center line as shown in FIGS. The separation locking body 20 is composed of a first separation locking material 31 and a second separation locking material 32 divided into two along, and the two separation locking materials 31, 32 are overlapped face to face. Further, the third embodiment of the distribution terminal insulated terminal cover according to the present invention will be described in terms of differences from the first embodiment.
Is divided into two portions along the center line as shown in FIG.
4 and 35 are integrally formed on the left and right sides of the flexible piece 33, and the divided locking portions 34 and 35 can be freely opened and closed about the flexible piece 33 as an axis.
This is an openable / closable locking body 20 in which both divided locking portions 34 and 35 are overlapped face to face.

The fourth embodiment of the insulated terminal cover for a distribution line according to the present invention will be described in terms of differences from the first to third embodiments. In the cap 1, as shown in FIG. , Tapered portion 12 and conical shoulder 1
3 and the tube portion 14 are provided continuously, and a partition 15 is provided between the storage chamber 2 and the tube portion 14, that is, inside the shoulder portion 13, and the partition 15 communicates from the storage room 2 to the tube portion 14. A drain hole 16 is provided, and rainwater that has penetrated into the terminal cover 10 is discharged to the outside from the drain hole 16 through the cylindrical portion 14, that is, the drain portion 16 and the cylindrical portion 14 separated from the distribution line terminal p. Water is discharged from the front.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cap 1 is provided at the entrance side of
A flange 4 that is slightly larger than the flange 4 is provided, the mouth 3 is formed in the flange 4, and a plurality of locking openings 6 are provided in the body 11 on the flange 4 side.
Further, the cap 1 is formed of, for example, an insulating synthetic resin such as polyacetal having excellent withstand voltage and weather resistance so that it can be grasped or sandwiched by an indirect hot-line tool. The non-slip 5 can be formed on a part of the body 11 and the tapered tapered portion 12, or can be formed partially or dispersedly as shown in FIG.

Even if the body 11 is formed into a square or polygonal square tube instead of the non-slip 5, it is easy and easy to grasp the cap 1 by using a hot stick of an indirect hot-line tool or a robot arm (also referred to as a manipulator). become. As a result, the insulated terminal cover for a distribution line according to the present invention can be safely attached even in a live state, and the work efficiency and work safety are dramatically improved.

As shown in FIG. 4, the peripheral wall 21 of the locking body 20 has a tapered shape with a diameter decreasing toward the back from the entrance.
An annular projection 24 and a locking claw 27 of the locking means 7 are provided on the entrance side of the first embodiment, and an umbrella-shaped shielding piece 25 is provided so as to project forward from the annular projection 24. Each of the locking members 20 of the fourth to fourth embodiments is formed of an insulating synthetic resin such as polyethylene having excellent withstand voltage and elasticity. The shielding piece 25 is thinner toward the tip than the annular projection 24, and is further divided into 3 to 12 pieces by a radial cut 26 from the annular projection 24 toward the center of the peripheral wall, and has elasticity in the inner and outer peripheral directions. Therefore, when the distribution line terminal p is inserted, the distribution line terminal p is spread out. After the insertion of the distribution line terminal p is completed, the distribution line terminal p is pressed against the distribution line terminal p to prevent the distribution line P from laterally oscillating. It can also prevent the invasion of birds and protect them from bird damage.

The support pieces 22 of the locking body 20 protrude from the inner circumference of the peripheral wall 21 toward the center of the peripheral wall, and are provided at appropriate intervals from the entrance of the peripheral wall 21 to the inner part thereof. 23 is formed with a large-diameter insertion portion 23 on the entrance-side support piece 22 and is formed with a large-diameter insertion piece 23 on the entrance-side support piece 22 so that the diameter of the insertion piece 23 decreases gradually from the entrance side to the depth. Formed with a small-diameter insertion portion 23,
Is provided with a cut 28 in the radial direction toward the center of the peripheral wall.

The distribution line thickness R that can be inserted into the locking body 20
The range that can be adopted is 9 mm to 21 mmφ (diameter 5 mmφ).
(A core wire with a cross-sectional area of 150 mm ² ). The locking body 20
Depending on the diameter of the insertion portion 23 provided on the inner periphery of the support piece 22, for example, as shown in FIGS. 9A and 9B, it can be formed into two types, one for a large diameter and the other for a small diameter. It is also possible to separately form three types, one for medium diameter and one for small diameter.

Since the insulated terminal cover for a distribution line according to the present invention has the above-described structure, the cap 1 is formed of an insulating synthetic resin in advance, and the locking member 20 is formed of an insulating synthetic resin having excellent elasticity. First, the peripheral wall 21 of the locking body 20 is
If the insertion is performed by inserting the locking claw 27 of the locking body 20 and the locking opening 6 of the cap 1 into the storage chamber 2 from the entrance side thereof, the protrusion protrudes outward from the peripheral wall 21. The locking claw 27, which deforms the peripheral wall 21 having excellent elasticity toward the center of the peripheral wall, also deforms itself and is pressed into contact with the inner surface of the body 11, and is inserted into the annular projection 24 of the locking body 20. Is fitted to the opening 3 of the cap 1, the locking claw 27 reaches the locking opening 6, returns by elasticity, and is inserted and locked in the locking opening 6.

In order to fit the insulated terminal cover of the present invention to the distribution line terminal p at the cut portion of the wrapping line as shown in FIG. 11, first, the body 11 of the cap 1 is connected to an indirect live tool such as a hot stick or a manipulator. By operating the indirect live tool and inserting the locking body 20 of the terminal cover 10 toward the distribution line terminal p, the distribution line terminal p pushes the shielding piece 25 as shown in FIG. It is inserted into the locking body 20 and inserted up to the insertion portion 23 of the support piece 22 corresponding to the distribution line thickness R. Locking body 2
No. 0 support piece 22 sandwiches the distribution line terminal p inserted into the terminal cover 10, and the shielding piece 25 of the locking body 20 presses against the distribution line terminal p on the distribution line P side from the cap 1 to lie sideways. Prevents swaying, prevents insects from entering, and protects against bird damage.

[0018]

The insulated terminal cover for a distribution line according to the present invention has the same structure as described above, and therefore has the following effects. In the insulated terminal cover for a distribution line according to the first aspect, the locking member having excellent elasticity is housed in a cap that can be grasped by an indirect hot-line tool and protected by the cap. Therefore, even if an external pressure acts on the distribution line terminal, the external pressure does not reach the locking body, and as a result, the distribution line terminal can be stably held for a long period of time without being restricted by weather conditions or the like. Moreover, since it is only necessary to insert the cable toward the end of the distribution line, no troublesome taping is required, and it can be mounted with one touch, so that it is suitable for mounting with an indirect live tool. Also, the support pieces of the locking body are provided at appropriate intervals, and the diameter of the support piece insertion portion gradually decreases from the entrance to the back, so one type of terminal cover can be minimized from the maximum thickness of the distribution line. It can also be used for distribution lines of large thickness. That is, it can be used for distribution lines having different thicknesses, so that it can be mass-produced and provided at low cost.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the insulated terminal cover for a distribution line is constituted by a separate locking member in which the locking member is divided into two along the center line. Can be superposed face to face.

According to a third aspect of the present invention, in addition to the effects of the first and second aspects, the insulated terminal cover for a distribution line further comprises a tubular portion provided at the tip end of the cap and a drain hole provided between the tubular portion and the storage chamber. Because
Even if rainwater enters the terminal cover, it can be drained naturally. In addition, the rainwater that has entered the terminal cover is discharged from the end of the cylindrical portion away from the drain hole and the distribution line terminal.

According to the fourth aspect of the present invention, in addition to the effects of the first, second, and third aspects, the insulated terminal cover for the distribution line can easily and easily engage the locking member by using the locking port of the cap.

[Brief description of the drawings]

FIGS. 1A and 1B are cross-sectional views showing an example of use of a first embodiment of an insulated terminal cover for a distribution line according to the present invention.

FIGS. 2A, 2B, and 2C are a partially cutaway front view showing a structural example of the insulated terminal cover for the distribution line, and an X1-X1 end view and an X2-X2 end view thereof.

FIGS. 3A, 3B, and 3C are a partially cutaway front view showing a structural example of a cap according to the first embodiment, and its Y1-Y1 cross-sectional view and Y2-Y2 cross-sectional view.

FIG. 4 is a partially cutaway front view showing a structural example of the locking body of the first embodiment.

FIGS. 5A, 5B, 5C, and 5D are a sectional view and a right side view, and a Z1-Z1 end view and a Z of the separation locking member according to the second embodiment.
It is a 2-Z2 end view.

FIGS. 6A, 6B, and 6C are a side view and a cross-sectional view of a separation type locking body according to a second embodiment, and a cross-sectional view of a separation locking material showing an example of a shape of a support piece.

FIGS. 7A and 7B are side views of the openable / closable locking body according to the third embodiment when it is opened and when it is closed.

FIG. 8 is a front view showing a structural example of a cap.

FIGS. 9A and 9B are partially cutaway front views showing a structural example of the locking body of the first embodiment.

FIGS. 10 (A), (B), (C), and (D) are a partially cutaway front view and a plan view of a cap according to a fourth embodiment, and enlarged end views of a partition piece forming portion and a cylindrical portion side shoulder.

11 (A) and 11 (B) are views showing the use state of the terminal cover of the present invention in the border line.

FIG. 12 is a diagram illustrating a usage state of a conventional terminal cover.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cap, 11 torso part, 12 taper part 2 Storage room 3 Mouth part 4 Flange part 5 Non-slip 6 Locking port 7 Locking means 10, C terminal cover 13 Shoulder part, 14 cylinder part, 15 partition piece, 16 drain hole Reference Signs List 20 locking body, 21 peripheral wall, 22 support piece, 23 insertion part 24 annular projection, 25 shielding piece, 27 locking claw, 26,
28 Notch 31, 32 Separate locking material, 33 Flexible piece, 34, 35
Split locking part P distribution line, p distribution line end, T adhesive tape, G insulator R distribution line thickness

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-107613 (JP, A) JP-A-56-158638 (JP, U) JP-A 50-41075 (JP, U) JP-A 61-108 141931 (JP, U) Japanese Utility Model Showa 55-112425 (JP, U) Japanese Utility Model Showa 51-122400 (JP, U) Japanese Utility Model 48-15322 (JP, Y1) Japanese Utility Model 48-25113 (JP, Y1) JK 49-7120 (JP, Y1) JK 49-15760 (JP, Y1) (58) Fields studied (Int. Cl. ⁷ , DB name) H02G 15/00-15/196 H01B 17/56 -17/58

Claims (4)

(57) [Claims] 1. A cap (1) which can be grasped by an indirect hot-line tool, and a locking member (20) having excellent elasticity which is accommodated in the cap (1). Support pieces (22) protruding from the peripheral wall (21) toward the center of the peripheral wall are formed at appropriate intervals between the entrance of the peripheral wall (21) and the inner part, and each support piece (22) extending from the inlet to the inner part is formed. An insulated terminal cover for a distribution line, wherein an insertion portion (23) of a distribution line terminal (p) having a smaller diameter is formed on the inner periphery of the distribution line. 2. A first separation locking member (31) and a second separation locking member (3) in which a locking body (20) is divided into two along a center line.
2. The insulated terminal cover for a distribution line according to claim 1, wherein said cover is formed by joining two separate locking members (31, 32). 3. The cap (1) has a storage chamber (2) inside and a tapered taper (12) from the body (11) to the tip.
And a cylindrical portion (14), wherein a drain hole (16) is provided between the cylindrical portion (14) and the storage chamber (2).
Or the insulated terminal cover for a distribution line according to 2. 4. The cap (1) is provided with a locking opening (6) in the body (11), and the locking body (20) is closed by a locking means (7) engaging with the locking opening (6). The insulated terminal cover for a distribution line according to claim 1, which is integrated with (1).