JP3305523B2 - Sleeve with insulation coating for electric wire connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a sleeve provided with an insulating cover for connecting electric wires, which is used, for example, to connect two distribution wires, which are installed on a telephone pole, with their ends facing each other. This is suitable for connecting a covered electric wire whose outer periphery is covered with an insulating material.

[0002]

2. Description of the Related Art A compression sleeve is conventionally used when two overhead wires are connected with their ends facing each other. This compression sleeve has various structures, and the main ones are shown in FIGS.

In the compression sleeve shown in FIG. 5, a partition wall C for dividing the insertion hole B in the left and right direction (axial direction) is press-fitted at the center of the wire insertion hole B of the sleeve body A, and is partitioned by the partition wall C. A paste-like compound F is filled in the two compartments D and E, and the compound F filled in the compartments D and E is provided at both ends G and H of the wire insertion hole B.
Leaks to the outside, or moisture in the outside air
A cap I for preventing intrusion into the inside is attached.

[0004] The compound F used here is obtained by mixing metal particles into grease as a main material, and improves the electric resistance of the electric wire connection part, the gripping force, the oxidation of the metal contact surface, the sleeve, and the like. It is used for the purpose of preventing electrolytic corrosion when the materials of the main body A and the electric wire J are different.

In order to connect an electric wire using this compression sleeve, first, caps I attached to both ends of the compression sleeve are removed, and then, as shown in FIG. Line K is the opening G of the compression sleeve,
H from the conductor F through the compound F
The outer periphery of the compression sleeve is successively compressed from both ends in the longitudinal direction toward the center by a compression tool (having a width shorter than the length of the compression sleeve) in this state. At this time, excess compound F leaks from both ends G and H of the compression sleeve, but the compound F is wiped off with a cloth or the like. Finally, when the compression sleeve and the exposed portions of the conductor at both ends are covered with an insulating tape or an insulating cover, the connection operation is completed.

A compression sleeve shown in FIG. 7 (a compression sleeve described in Japanese Patent Application No. 4-319442 previously developed and filed by the present applicant) is provided at the center of the wire insertion hole B of the sleeve body A. C that divides right and left (axial direction)
Are inserted into the compartments D and E partitioned by the partition C, the tubular absorber L is filled with the paste-like compound F, and the openings G and H at both ends of the wire insertion hole B are inserted. A cap I is attached to prevent the compound F filled in the compartments D and E from leaking to the outside and preventing moisture in the outside air from entering the sleeve body A. The cap I is attached to the openings G and H at both ends so as not to come off easily. Also, the electric wire J is easily inserted into the center of the cap I so that the electric wire J can be inserted into the electric wire insertion hole B with the cap I attached. A thin film portion N which can be broken through is formed. The cap I is formed so as to protrude outwardly from both ends G and H, and an absorption chamber M for storing the compound F flowing out from both ends G and H is formed inside the cap I. . In addition, a mark O indicating the compression position by the compression tool is displayed on the outer peripheral surface of the sleeve body A.

In order to connect an electric wire using this compression sleeve, the conductor wire K of the electric wire J shown in FIG. 6 is pressed against the thin film portion N of the cap I and pierced through the thin film portion N until it hits the absorber L. The compression sleeve is compressed in order from the both ends in the longitudinal direction toward the center of the compression sleeve. The excess compound F generated in the sleeve by the compression is absorbed by the absorber L and the absorption chamber M inside the cap I and does not leak to the outside, so that the compression sleeve and the exposed portions of the conductor at both ends thereof are directly covered with an insulating tape or an insulating cover. The connection work is completed by covering with.

A compression sleeve shown in FIG.
2772) is a partition wall C at the center of the wire insertion hole B of the sleeve main body A, which divides the insertion hole B left and right (axial direction).
Is formed on the outer periphery of the sleeve main body A so as to protrude outward from both end openings G and H of the sleeve main body A to form a cylindrical shape, and a cap I is provided at an end of the insulating coating layer P. Be attached. This cap I is attached to the end of the insulating coating layer P so as not to come off easily.
A thin film portion N which can be easily pierced by the electric wire J is formed at the center of the cap I so that the electric wire J can be inserted into the electric wire insertion hole B with the cap I attached.

In order to connect an electric wire using this compression sleeve, the conductor wire K of the electric wire J is pressed against the thin film portion N of the cap I, and is inserted until the thin film portion N is pierced and hits the partition C. A predetermined portion of the outer periphery is sequentially compressed from both ends in the longitudinal direction toward the center.
In this case, since the sleeve main body A is covered with the insulating coating layer P, there is no need to perform another insulating coating after the connection. Even if the conductor wire K is extended outward in the axial direction by compression, the conductor wire K does not protrude outside the space R formed by the insulating coating layer P and the cap I, and fits in the space R. The connection is completed without applying an insulating coating by wrapping an insulating tape around the longitudinal ends of the compression sleeve or covering the insulating sleeve with an insulating cover.

[0010]

Although each of the above-mentioned compression sleeves has its own characteristics, it has the following problems. The problems with the compression sleeve of FIG. 5 are as follows. . After the compression operation, the outer periphery of the compression sleeve must be covered with an insulating tape or an insulating cover, which is troublesome. . It is troublesome to wipe off the compound F leaked from the openings G and H of the compression sleeve with a cloth or the like. . When the compound F leaked from the openings G and H of the compression sleeve adheres to the clothes, the compound F does not easily fall off even after washing, so that the work clothes become dirty and it is difficult to maintain a clean and comfortable working environment. . If the compound F leaked from the openings G and H falls on the ground and scatters, the nearby sidewalks and roads become dirty, and cleaning is also difficult. . Although the compression position by the compression tool is displayed, the visibility is lacking, so there is a possibility that the compression position may be mistaken or the number of compressions may be mistaken. . In this case, if a mistake is not noticed, an accident such as a disconnection of a connection point is caused, which is extremely dangerous. . When a new connection operation is performed after noticing a mistake, it is necessary to perform the connection operation again using a new compression sleeve, which wastes the operation time and the sleeve cost.

The problems with the compression sleeve of FIG. 7 are as follows. . The problems (1) to (5) have been solved in comparison with the compression sleeve of FIG. 5, but the trouble of covering the outer periphery of the compression sleeve with an insulating tape or an insulating cover after connecting the electric wires has not been solved. . Although the compression position by the compression tool is clearly indicated by the mark O, there is a case where the position shift occurs due to the work in an unstable state at a high place or when the work is performed quickly. In this case, the above problem occurs.

The problems with the compression sleeve of FIG. 8 are as follows. . During the connection operation, the sleeve and the insulating coating layer may be displaced. . Since the compression position by the compression tool is not specified,
There is a possibility that the compression position may be confused or the number of times of compression may be confused. . The degree of adhesion of the wire covering portion is weak, and there is a possibility that rainwater may enter from the end of the sleeve.

An object of the present invention is to solve the above-mentioned problems and to provide a sleeve with an insulating coating for electric wire connection which does not leak the compound, is easy to handle, and can be easily compressed.

[0014]

According to the present invention, as shown in FIGS. 1, 2, and 3, a sleeve with an insulating coating for electric wire connection according to the present invention is formed on the outer peripheral surface of a sleeve body 1 made of metal. A compound 4 is filled in an electric wire insertion hole 3 opened at both ends in the longitudinal direction of the sleeve main body 1, and an electric wire 5 is inserted into the electric wire insertion hole 3 from both ends thereof. When the sleeve body 1 is compressed together with the electric wires 5 from the outside of the sleeve, the electric wires 5 are connected in a conductive state and the compound 4 is expanded into the electric wire insertion hole 3. At both ends in the longitudinal direction of the layer 2, cylindrical projections 6 projecting outward from the longitudinal ends of the sleeve body 1 are formed, and inside the cylindrical projections 6, gaskets 7 whose tips become gradually smaller in diameter are inserted. hand, A housing space 9 capable of housing the compound 4 expanding outward when the insulating coating layer 2 and the sleeve main body 1 are pressed is provided between the small-diameter portion 8 and the cylindrical protrusion 6. Is what you do.

As shown in FIG. 3, the sleeve with the insulating coating for electric wire connection according to the second aspect of the present invention is pierced by the electric wire 5 inserted into the electric wire insertion hole 3 at the tip of the small diameter portion 8 of the gasket 7. And a penetrating blocking film 10 is formed.

According to a third aspect of the present invention, there is provided a sleeve with an insulating coating for electric wire connection according to a third aspect of the present invention. A plurality of protrusions 11 are formed at desired intervals.

According to a fourth aspect of the present invention, in the sleeve with an insulating coating for electric wire connection, a ring-shaped groove 12 is formed on an outer peripheral surface at a substantially central portion in a longitudinal direction of the sleeve main body 1, and an inner surface of the insulating coating layer 2 is formed. It is characterized by being covered by being inserted into the groove 12.

[0018]

According to the first aspect of the present invention, in the sleeve with the insulating coating for electric wire connection according to the first aspect, cylindrical protruding portions 6 are formed at both ends in the longitudinal direction of the insulating coating layer 2 so as to protrude outward from the longitudinal end of the sleeve main body 1. Then, a gasket 7 whose tip gradually becomes smaller is inserted into the inside of the cylindrical protrusion 6, and the insulating coating layer 2 and the sleeve body 1 are inserted between the small diameter portion 8 and the cylindrical protrusion 6.
Since the accommodation space 9 capable of accommodating the compound 4 expanding outward when the pressure is applied is provided, the compound 4 does not leak to the outside of the sleeve when the electric wire is connected.

In the sleeve of the present invention, the distal end of the small diameter portion 8 of the gasket 7 is
Since the closing film 10 which is pierced and penetrated by the electric wire 5 to be inserted into the electric wire insertion hole 3 is formed, the compound 4 filled in the sleeve does not leak to the outside during storage or transportation of the sleeve. Also, water, dust, etc. do not enter the sleeve.

According to a third aspect of the present invention, in the sleeve with an insulating coating for electric wire connection, a ring-like shape for determining a compression position on a peripheral surface of the insulating coating layer 2 by a compression tool for compressing the insulating coating layer 2 and the sleeve body 1. Are formed at a desired interval, so that the compression position and the number of times of compression are mistaken,
The compression position does not shift.

In the present invention, in the sleeve with the insulating coating for electric wire connection according to the present invention, a ring-shaped groove 12 is formed on the outer peripheral surface at a substantially central portion in the longitudinal direction of the sleeve main body 1, and the insulating coating layer 2 is formed.
To cover the inner surface of the
Even if the insulating coating layer 2 is partially stretched in the longitudinal direction of the sleeve during compression, the insulating coating layer 2 at the portion locked in the groove 12 at the substantially central portion in the longitudinal direction of the sleeve body 1 is torn. The insulating coating layer 2 is kept in a predetermined position without being easily shifted, shifted or detached.

[0022]

Embodiment 1 A first embodiment of a sleeve with an insulating coating for electric wire connection according to the present invention will be described in detail with reference to FIG. 1 is an aluminum sleeve body formed in a pipe shape. The length, outer diameter, and inner diameter of the sleeve body 1 are appropriately determined based on the outer diameter of the electric wire 5 to be connected and other conditions. It is. Of the electric wire insertion holes 3 opened at both ends in the longitudinal direction of the sleeve main body 1, a taper process is applied near the electric wire insertion hole, and the electric wire 5 with the conductor portion exposed by removing the insulating coating is inserted into the insertion hole 3. So that it can be easily plugged in. A partition 21 for dividing the insertion hole 3 into two left and right compartments 20 (only the right compartment is shown) is provided at a central portion in the longitudinal direction of the insertion hole 3. A circular aluminum plate slightly smaller than the inner diameter of the hole 3 is inserted from one end of the insertion hole 3 into the center position in the longitudinal direction, and the aluminum plate is crushed and spread from both right and left sides using a special tool. It is locked at the center of the sleeve body 1.

The interior of the left and right compartments 20 of the sleeve body 1 is filled with an appropriate amount of a paste-like compound 4 obtained by mixing grease with metal particles. When the compound 4 is inserted deeply into the insertion hole 3 until it hits the partition 21 in the insertion hole 3, the insertion hole 3 and the electric wire 5
When the sleeve body 1 is compressed together with the electric wire 5, the electric resistance of the electric wire connection portion is improved, the gripping force is improved, and the metal contact surface is prevented from being oxidized. In addition, it is possible to prevent electrolytic corrosion when the material of the sleeve body and the material of the electric wire are different.

FIG. 1 shows a plastic insulating coating layer 2 covering the outer peripheral surface of the sleeve body 1. The insulating coating layer 2 can withstand a high voltage of 6600 V AC and
Even when compressed by a 5 ton compression tool, a load capable of sufficiently deforming the sleeve body 1 is transmitted, and sufficient electrical and mechanical performance is maintained even after compression.

The insulating coating layer 2 is formed by forming a ring-shaped groove 12 on the outer periphery at the center in the longitudinal direction of the sleeve main body 1 so that the insulating coating layer 2 does not shift or slip off with respect to the sleeve main body 1. It is formed on the outer periphery by insert formation. By forming the groove 12 at the center in the longitudinal direction of the sleeve main body 1, even if the insulating coating layer 2 and the sleeve main body 1 are compressed by the compression tool and the insulating coating layer 2 is partially stretched in the longitudinal direction of the sleeve, The portion of the insulating coating layer 2 that is locked by the groove 12 is hardly torn, shifted, or detached in the same direction.

On the outer peripheral surface of the insulating coating layer 2, projecting portions 11 are formed in a ring shape at predetermined intervals along the longitudinal direction of the sleeve main body 1. The projecting portions 11 are formed just on both sides of the compression position by the die 25 of the compression tool. When the compression die 25 is temporarily fixed between the projecting portions 11, the die is located at the same position. The die 25 is fixed so that the die 25 is not displaced even in the final compression work.

Further, at both ends of the insulating coating layer 2, a cylindrical projecting portion 6 is formed by projecting both end portions outward from both ends in the longitudinal direction of the sleeve main body 1. When the electric wire 5 with the insulating coating at the end stripped is inserted into the insertion hole 3 of the sleeve main body 1 as specified, the cylindrical protrusion 6 extends from the conductor portion of the electric wire 5 to the portion where the insulating coating is left. The length is set so that it can be covered with some margin. Incidentally, on the outer peripheral surface of the insulating coating layer 2, the length of the insulating coating of the electric wire 5 is indicated by a gauge G.

Reference numeral 7 shown in FIG. 1 denotes a gasket made of a soft resin, which is attached to the cylindrical protrusion 6. The gasket 7 is composed of a cylindrical portion 29 that enables the insulated portion of the electric wire 5 to be in close contact with the gasket 7 and a small-diameter portion 8 whose tip gradually becomes smaller in diameter, and is formed in a tapered cylindrical shape as a whole. Have been. The gasket 7 is attached to the inside of the cylindrical projection 6 so that the small diameter portion 8 is located on the inner side of the cylindrical projection 6. The outer peripheral edge 26 of the gasket 7 attached in this manner is supported by a projection 28 that is formed by bending the outer peripheral edge 27 of the cylindrical protrusion 6 toward the inner peripheral side and projecting out.
This prevents the gasket 7 from falling out of the cylindrical projection 6.

A slit 24 is formed in the small diameter portion 8 of the gasket 7 so that the conductor portion of the electric wire 5 inserted toward the insertion hole 3 of the sleeve body 1 can penetrate smoothly. The outer peripheral surface of the small-diameter portion 8 and the inner peripheral surface of the opposed cylindrical protrusion 6 form an accommodation space 9.
The compound 4 leaking from the insertion hole 3 is accommodated.

Incidentally, the slit 24 of the gasket 7 may be formed so that its cut portion is connected by a thin film. In this case, the compound 4 from the slit 24 portion is formed.
Leakage can be reliably prevented. In addition, the gasket 7 may not be provided with the slit 24 at all.

[0031]

Embodiment 2 FIG. 2 shows a second embodiment of the sleeve with an insulating coating for electric wire connection according to the present invention. In this case, the sleeve body 1
The insulating coating layer 2 has basically the same structure as that of the first embodiment, and the gasket 7 attached to the cylindrical protrusions 6 at both ends of the insulating coating layer 2 has a composite structure in which the gasket 7 is attached to the cap 30.

The cap 30 is made of plastic, has a flange 31 formed at one end with a diameter larger than that of the cylindrical projecting portion 6, and a mounting portion 3 for mounting the gasket 7 at the other end.
2 is formed. The gasket 7 is connected and fixed to the mounting portion 32.

As in the first embodiment, the gasket 7 has a cylindrical portion 2 capable of adhering to the insulated portion of the electric wire 5.
9 and a small-diameter portion 8 whose tip gradually becomes smaller in diameter. A slit 24 is formed in the small diameter portion 8 of the gasket 7 so that the conductor of the electric wire 5 inserted into the insertion hole 3 of the sleeve body 1 can smoothly penetrate.

In this case, the gasket 7 attached to the inside of the cylindrical protrusion 6 together with the cap 30 has a housing space 9 similar to that of the first embodiment between the small diameter portion 8 and the cylindrical protrusion 6. The compound 4 leaking from the insertion hole 3 of the sleeve body 1 when compressed is accommodated in the accommodation space 9.

[0035]

Embodiment 3 FIG. 3 shows a third embodiment of the sleeve with an insulating coating for electric wire connection according to the present invention. In this case, the sleeve body 1
The insulating coating layer 2 has basically the same structure as that of the first embodiment, and the gasket 7 attached to the cylindrical protrusions 6 at both ends of the insulating coating layer 2 is integrated with the cap 35.

The cap 35 is made of plastic, and is bent at one end of a cylindrical body 36 covering the outer peripheral surface of the cylindrical projection 6 toward the inside of the cylindrical projection 6 in a stepwise manner. A flange 37 is formed at the bottom, and this portion plays the role of the gasket 7 of the first and second embodiments. The distal end of the flange 37 is brought into close contact with the outer peripheral surface of the insulating coating portion of the electric wire 5, so that the cylindrical protrusion 6
Can be closed. The housing space 9 is formed between the inner surface of the flange 37 of the cap 35 attached to the cylindrical protrusion 6 and the inner peripheral surface of the cylindrical protrusion 6. At the time of compression, the compound 4 leaking from the insertion hole 3 of the sleeve body 1 is accommodated.

In the third embodiment, only the compression position is indicated by the white line 38 without forming the positioning projection 11 on the outer periphery of the insulating coating layer 2.

In this embodiment, a closing film 10 which can be easily pierced by the electric wire 5 may be formed at the central opening of the flange 37 of the cap 35. In this way, even if the compound 4 leaks out of the sleeve body 1 during storage or transportation, it does not flow out to the outside, and dust or water enters the sleeve body 1 from the outside. Nor.

In order to compress the above-described sleeves with an insulating coating for electric wire connection, it is preferable to use a die 25 having a shape obtained by dividing a hexagon into two as shown in FIG. The use of the hexagonal split die 25 makes it difficult for cracks, chips or the like to enter the portions of the compression sleeve indicated by x in the figure, and makes it possible to compress the entire sleeve relatively safely.

[0040]

The sleeve according to the first aspect of the present invention has the following effects. . Since the compound 4 filled in the compartment 20 of the sleeve main body 1 does not flow out during the compression work, the wiping operation of the compound 4 becomes unnecessary, and the compound 4 that has flowed out falls down on nearby roads and sidewalks. It doesn't get dirty. Also, there is no risk of soiling the clothes of the workers. . Since the sleeve main body 1 and the portions on both outer sides in the longitudinal direction are covered by the insulating coating layer 2, the cylindrical protrusion 6, and the gasket 7, the insulating coating is not applied by winding the insulating tape or covering the insulating cover. And the connection work can be completed quickly. . The gasket 7 which is in close contact with the electric wire 5 prevents water from entering the sleeve body 1 and has a high waterproof effect.

According to the sleeve with an insulating coating for electric wire connection of the present invention, the compound 4 in the sleeve main body 1 does not flow out during storage or transportation, and also enters the sleeve main body 1 from outside. Handling is very easy because no garbage or water enters.

According to the sleeve of the present invention, since the projecting portion 11 is formed on the insulating coating layer 2, the positioning of the compression position by the compression tool is easy and the height is high. Compressing work can be performed reliably, accurately and quickly even in unstable work conditions.

According to the sleeve with an insulating coating for electric wire connection of the present invention, even if the insulating coating layer 2 and the sleeve main body 1 are compressed by a compression tool, the insulating coating layer 2 is hard to be displaced and is safe. .

[Brief description of the drawings]

FIG. 1 is a first view of a sleeve with an insulating coating for electric wire connection according to the present invention.
FIGS. 3A and 3B are cross-sectional views illustrating an embodiment of the present invention, in which FIG. 3A illustrates a state before an electric wire is inserted, and FIG.

FIG. 2 is a second view of the sleeve with an insulating coating for electric wire connection according to the present invention.
Sectional drawing which shows the Example of FIG.

FIG. 3 is a third view of the sleeve with an insulating coating for electric wire connection according to the present invention;
Sectional drawing which shows the Example of FIG.

FIG. 4 is an explanatory view showing an example of a compression tool for compressing the sleeve with an insulating coating for electric wire connection of the present invention.

FIG. 5 is a perspective view showing an example of a conventional compression sleeve.

FIG. 6 is a perspective view showing a state when an electric wire is inserted into the compression sleeve shown in FIG. 5;

FIG. 7 is a sectional view showing another example of a conventional compression sleeve.

FIG. 8 is a sectional view showing still another example of the conventional compression sleeve.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sleeve main body 2 Insulation coating layer 3 Electric wire insertion hole 4 Compound 5 Electric wire 6 Cylindrical protrusion 7 Gasket 8 Small diameter part 9 Housing space 10 Closure film 11 Ring-like protrusion 12 Groove

──────────────────────────────────────────────────続 き Continuing from the front page (72) Nobuaki Nasu, Inventor Kyushu Electric Power Co., Inc., 2-1-2 Watanabe-dori, Chuo-ku, Fukuoka City, Fukuoka Prefecture 1. Inside Japan Burnday Co., Ltd. (56) References JP-A-6-150986 (JP, A) JP-A-56-158079 (JP, U) JP-A-60-62772 (JP, U) JP-A-2-22569 (JP, U) J. 52-6873 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 4/70 H01R 4/20

Claims (4)

(57) [Claims] An insulating coating layer (2) made of resin is formed on an outer peripheral surface of a metal sleeve body (1), and is inserted into an electric wire insertion hole (3) opened at both longitudinal ends of the sleeve body (1). Filled with compound (4), wire insertion hole (3)
When the electric wire (5) is inserted from both ends into the inside and the sleeve body (1) is compressed together with the electric wire (5) from the outside of the insulating coating layer (2), the electric wires (5) are connected to be able to conduct. In a sleeve with an insulating cover for electric wire connection in which the compound (4) extends into the electric wire insertion hole (3), both ends of the insulating covering layer (2) in the longitudinal direction are outside the longitudinal end of the sleeve body (1). A cylindrical projection (6) projecting in the direction is formed, and a gasket (7) whose tip gradually decreases in diameter is inserted inside the cylindrical projection (6), and the small-diameter portion (8) and the cylinder are inserted. And a housing space (9) capable of housing a compound (4) that expands outward when the insulating coating layer (2) and the sleeve body (1) are pressed, between the protrusions (6). A sleeve with an insulating coating for electric wire connection, characterized by: 2. A closing film (10) which is pierced and penetrated by an electric wire (5) inserted into an electric wire insertion hole (3) at an end of a small diameter portion (8) of the gasket (7) according to claim 1. ) Is formed, the sleeve having an insulating coating for electric wire connection. 3. A ring-shaped projection on an outer peripheral surface of the insulating coating layer (2) according to claim 1, which determines a compression position of a compression tool for compressing the insulating coating layer (2) and the sleeve body (1). (11) A sleeve with an insulating coating for electric wire connection, wherein a plurality of (11) are formed at desired intervals. 4. A sleeve with an insulating coating for electric wire connection according to any one of claims 1 to 3, wherein a ring-shaped groove (12) is formed on an outer peripheral surface at a substantially central portion in a longitudinal direction of the sleeve body (1). A sleeve with an insulating coating for electric wire connection, wherein the sleeve is formed and covered by inserting an inner surface of the insulating coating layer (2) into the groove (12).