JP3254270B2 - Compression sleeve for wire connection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compression sleeve for connecting electric wires used, for example, for straight connection of high-voltage and low-voltage overhead aluminum distribution lines installed on a telephone pole.

[0002]

2. Description of the Related Art Conventionally, aluminum compression sleeves as shown in FIG. 6 have been used for linear connection between overhead aluminum distribution wires. In this method, a partition wall B that divides the inside of the aluminum pipe A to the left and right (axial direction) is crimped to the aluminum pipe A, and a through hole E is opened in the peripheral walls of the compartments C and D on both sides of the partition wall B.
The compartments C and D are filled with the paste-like connection compound F (the case where only the compartment D is filled is shown).
In addition, resin caps G are attached to both ends of the aluminum pipe A so that the connection compound F filled in the aluminum pipe A leaks out or moisture in the outside air enters the aluminum pipe A. I try not to. Further, a label H is stuck on the outer peripheral surface at the center in the longitudinal direction of the aluminum pipe A so as to cover the two through holes E so that the label H prevents the connection compound F from flowing out of the through hole E. It is.

As the connection compound F, grease is used as a main material, and metal particles are mixed therein, whereby the electric resistance of the connection portion can be improved, the gripping force can be increased, and oxidation of the metal contact surface can be prevented. This is the case with today's compression sleeves of this kind.

[0004] By using this compression sleeve, aluminum distribution line I
In order to connect the compression sleeve, first remove the caps G attached to both ends of the compression sleeve, and then, as shown in FIG. (Only one side is shown), and through the connecting compound F, the same aluminum core wire J
In this state, the outer periphery of the compression sleeve is sequentially compressed from both ends toward the center by a compression tool (having a width shorter than the length of the compression sleeve).

[0005]

However, the conventional compression sleeve has the following problems. . When the outer periphery of the compression sleeve into which the aluminum core wire J is inserted is sequentially compressed from both ends toward the center by a compression tool, an extra connection compound F is pushed toward the partition wall B side and is pushed out from the through hole E, While the connection compound F pushes up the label H (FIG. 7), it flows along the back surface and flows out. For this reason, the worker who connects the electric wires has to wipe off the connection compound F which has flowed out with a cloth or the like, which requires extra labor. . Since the cap G attached to the opening at both ends of the compression sleeve is removed when the aluminum core wire J is inserted, an extra connection compound F flows out from the opening at both ends when the sleeve is compressed. Therefore, it is necessary to wipe the connection compound F. . The connection compound F has no toxicity or irritating odor, but if it gets on worker's gloves or clothes, it will not easily fall off even after washing, so the work clothes will become dirty and it will be difficult to maintain a clean and comfortable working environment . . Since the electric wire connection using the compression sleeve is also performed on the erection wire on the road, if the connection compound F flows out from the compression sleeve and falls on the ground or scatters during the work, the nearby sidewalk and road will be dirty. The cleaning is also difficult.

The compression sleeve for connecting electric wires of the present invention prevents the connection compound filled in the compression sleeve from flowing out during compression connection, thereby eliminating the work of wiping the connection compound and preventing the connection compound from scattering and falling. The purpose is to improve the workability and work environment.

[0007]

As shown in FIGS. 1 and 2, a compression sleeve for connecting an electric wire according to the present invention is formed by partitioning a metal pipe 1 inside a metal pipe 1 in the axial direction by a partition 2. 2, compartments 3 and 4 are formed on both sides.
The inside is filled with the connection compound 5, and the respective compartments 3, 4
In the wire-connecting compression sleeve for connecting the two wires by compressing the metal pipe 1 in this state, the two wires are joined together with the bulkhead 2 interposed therebetween. Further, an absorption adapter 8 having an accommodating portion 7 for absorbing the connection compound 5 which is pressed toward the partition 2 at the time of the compression is disposed.

According to a second aspect of the present invention, there is provided a compression sleeve for electric wire connection according to the first aspect, wherein a through hole 9 is opened in the peripheral wall of the compartments 3 and 4. is there.

According to a third aspect of the present invention, in the compression sleeve for connecting an electric wire, the inside of the metal pipe 1 is partitioned in the axial direction by a partition 2 to form compartments 3 and 4 on both sides of the partition 2. A through hole 9 is opened in the peripheral wall of each of the compartments 3 and 4.
The inside is filled with the connection compound 5, and the respective compartments 3, 4
In the wire connecting compression sleeve for connecting the wires by compressing the metal pipe 1 in that state, the wires are joined to each other with the partition wall 2 interposed therebetween. An absorption adapter 8 having a housing portion 7 for absorbing the connection compound 5 which is pressurized and flows out from the through hole 9 is attached.

According to a fourth aspect of the present invention, there is provided a compression sleeve for electric wire connection according to the first or second or third aspect, wherein caps 12 and 13 are attached to openings 10 and 11 at both ends of the metal pipe 1. , The caps 12, 13
And a slit through which an electric wire can be penetrated.

According to a fifth aspect of the present invention, there is provided a compression sleeve for electric wire connection according to the first or second or third aspect, wherein caps 12 and 13 are attached to both ends 10 and 11 of the metal pipe 1. , The caps 12, 13
In this case, a thin film portion 15 through which an electric wire can penetrate and penetrate is formed.

[0012]

According to the first aspect of the present invention, the compression sleeve for connecting electric wires according to the first aspect of the present invention accommodates the connection compound 5 which is pressed to the partition wall 2 side when the partition wall 2 in the compartments 3 and 4 of the metal pipe 1 is compressed. Since the absorption adapter 8 having the portion 7 is arranged,
An electric wire is inserted into each of the compartments 3 and 4, and the two electric wires are joined to each other with the partition wall 2 interposed therebetween. After the connection compound 5 filled in the same metal pipe 1 penetrates around the electric wires, the outer periphery of the metal pipe 1 is formed. Is compressed from both ends toward the center, the connection compound 5 that has been pushed toward the partition wall 2 by the compression is absorbed by the housing portion 7 of the absorption adapter 8.

According to the second aspect of the present invention, even if the through holes 9 are opened in the peripheral walls of the compartments 3 and 4, the connection compound 5 which is pushed toward the partition 2 by the compression even if the through holes 9 are opened in the peripheral walls of the compartments 3 and 4. Is absorbed by the accommodating portion 7 of the absorption adapter 8, so that the connection compound 5 does not flow out of the through hole 9.

According to the third aspect of the present invention, in the compression sleeve for electric wire connection, the connection compound 5 which is pressurized at the time of compression on the outer periphery of the compartments 3 and 4 of the metal pipe 1 and flows out from the through hole 9 is provided.
Since the absorption adapter 8 having the accommodating portion 7 for absorbing the water is attached, the electric wires are inserted into each of the compartments 3 and 4 and both the electric wires are separated from the partition wall 2.
After the connection compound 5 filled in the metal pipe 1 is infiltrated around the electric wire, the outer periphery of the metal pipe 1 is compressed from both ends toward the center. The connection compound 5 flowing out of the through hole 9 is absorbed by the housing portion 7 of the absorption adapter 8.

According to the fourth aspect of the present invention, since the slits through which the electric wires can pass are formed in the caps 12 and 13, the electric wires are inserted into the metal pipe 1 through the slits while the caps 12 and 13 are attached. And insert
Connection compound 5 filled in the metal pipe 1
After infiltrating the metal pipe 1 along each electric wire, even if compression work of the metal pipe 1 is performed, both end openings 10 and 11
The connection compound 5 flowing out of the cap 12, 13
Trapped inside.

According to the fifth aspect of the present invention, since the thin film portion 15 through which the electric wire can penetrate is formed in the caps 12 and 13, the thin film portion 15 is pierced with the caps 12 and 13 attached. Electric wire to metal pipe 1
After the connection compound 5 filled in the metal pipe 1 is infiltrated along each electric wire, even if the metal pipe 1 is compressed, the both ends of the metal pipe 1 are opened. The connection compound 5 flowing out of 11 is confined in the caps 12,13.

[0017]

Embodiment 1 An embodiment of a compression sleeve for electric wire connection according to the present invention will be described in detail with reference to FIGS. 1 shown in the figure
Is a metal pipe 1 made of an aluminum pipe. The dimensions such as the length, outer diameter, and inner diameter of the metal pipe 1 are determined according to the use location, the diameter of the electric wire to be connected, and the like. The inner portions of the openings 10 and 11 at both ends of the metal pipe 1 are tapered so that electric wires can be easily inserted through the openings 10 and 11 at both ends. An arrow indicating the compression direction and a mark M indicating the compression position by the compression tool are displayed on the outer periphery of the metal pipe 1.

At the center in the longitudinal direction of the metal pipe 1, a partition wall 2 for dividing the inside of the pipe 1 into two left and right compartments 3 and 4 is crimped. The partition 2 is made of an aluminum plate formed in a circular shape slightly smaller than the inner diameter of the metal pipe 1.
Insert the aluminum plate from one end to the center position in the longitudinal direction, crush the aluminum plate from both sides using special tools,
It is locked inside the metal pipe 1. The side walls of the compartments 3 and 4 on both sides of the partition 2 have a diameter of 2 m.
About m through holes 9 are respectively formed.

Reference numeral 5 shown in FIG. 1 denotes a paste-like connection compound filled in the compartments 3 and 4 on both sides of the partition 2. This is filled in the compartments 3 and 4 after the absorption adapter 8 described later is inserted and arranged in each compartment 3 and 4. As the connection compound F, grease is used as a main material, and metal particles are mixed therein, thereby improving the electric resistance of the connection portion, increasing the gripping force, and preventing oxidation of the metal contact surface. is there.

Reference numeral 8 shown in FIG. 1 is an absorption adapter having a housing 7 for absorbing the connection compound 5. The absorbing adapter 8 is formed of a synthetic resin into a cylindrical shape having a diameter slightly smaller than the inner diameter of the metal pipe 1 so that it can be inserted into the compartments 3 and 4, and a connecting compound 5 is formed inside the absorbing adapter 8. Cylindrical housing 7 for absorption
Is formed. The side wall 24 on the side wall 2 side of the absorption adapter 8 is open, and the opposite side surface 22 is provided with a small hole 23. In the hole 23, a thin film (not shown) is formed, and when the metal pipe 1 is compressed, the pressure causes the connection compound 5 to break through the thin film and flow into the accommodating portion 7 in the adapter.

The volume of the housing 7 formed in the absorption adapter 8, the diameter of the hole 23, and the thickness of the thin film formed therein are finely adjusted at the design stage. At the time of insertion, the connection compound 5 does not enter the absorption adapter 8 and is properly filled around the electric wire, and at the time of compression connection, the connection compound 5 penetrates the hole 23 and does not flow out of the through-hole 9. 8 to be absorbed.

As the absorption adapter 8, besides the one described above, for example, one having a shape as shown in FIGS. 3 (a) to 3 (d) can be used. It should be noted that the circles shown in the figures indicate the side where the connection compound 5 is filled, and electric wires are inserted from the side of the circles. The absorption adapter 8 shown in FIG. 5A has a side surface 22 closed, and an extra connection compound 5 generated during compression.
Is transmitted to the outer peripheral surface of the absorption adapter 8 and passes through the slit 25 formed therein to enter the inner accommodating portion 7.

The absorption adapter 8 shown in FIG.
2 is slightly depressed, and two holes 23 through which the connection compound 5 passes are formed therein.

The absorption adapter 8 shown in FIG.
Circular stopper 29 so that the tip of the electric wire hits 2
And a hole 23 is formed on the back side of the stopper 29, so that the connection compound 5 passes through the edge of the stopper 29 and enters the housing portion 7 through the hole 23.

The absorption adapter 8 shown in FIG.
2, a hole 23 through which the connection compound 5 passes is formed in a cross-shaped slit shape.

Although the absorption adapter 8 is made of a synthetic resin, it may be made of a metal such as aluminum.

Reference numerals 12 and 13 shown in FIG. 1 denote synthetic resin caps attached to the openings 10 and 11 at both ends of the metal pipe 1. The cap 12 (13) is
It is structured to be attached so as to cover the outer edge of (11), and the side surface 35 is located slightly outside the opening 10 (11). The side surface 35
Has a convex lens-like thin film portion 1 slightly larger than the diameter of the electric wire.
5 is formed, and the thin film portion 15 comes out of the caps 12 and 13 when the tip of the electric wire is applied to the thin film portion 15 and is pressed strongly, so that the electric wire can be passed therethrough. A small space 36 formed between the side surface 35 and the opening 10 (11) stores the connection compound 5 flowing out of the opening 10 (11) when the pipe is compressed so as not to flow out of the cap 12 (13). It is for keeping.

The caps 12 and 13 are shown in FIGS.
In addition to the shapes shown in FIGS. 4A and 4B, caps 12 and 13 shown in FIGS. 4A and 4B can be used.

The cap 12 (13) shown in FIG. 1A has the same structure as that of FIG. 1, but the cap 12 (13) has an edge portion that covers the opening 10 (11). It is formed slightly longer so that it is hard to fall out of the opening 10 (11).

The cap 12 (13) shown in FIG. 2B has a structure similar to that of FIG. 1, but the cap 12 (13) is provided at the edge portion covering the opening 10 (11). An inward projection 38 is formed, and the projection 38 fits into the recess formed in the opening 10 (11). This prevents the cap 12 (13) from falling out of the opening 10 (11) even if the edge portion is short.

The side surface 3 of the cap 12 (13)
A slit may be formed so that an electric wire can be penetrated without forming the convex lens-shaped thin film portion 15 on 5.

[0032]

Embodiment 2 FIG. 5 shows another embodiment of the compression sleeve for connecting electric wires according to the present invention. The metal pipe 1, the partition 2, the through hole 9, and the connection compound 5 (not shown) in the compression sleeve for connecting electric wires are exactly the same as those in the first embodiment. However, an absorption adapter 8 having a receiving portion 7 for absorbing the connection compound 5 flowing out from both through holes 9 was attached to the outer periphery of the metal pipe 1. The absorption adapter 8 is formed by forming a synthetic resin into a tubular shape so as to be in close contact with the outer peripheral surface of the metal pipe 1. A ring-shaped accommodation portion 7 as shown in FIG. Two holes are formed at the same interval as the through holes 9.
Further, as shown in FIG. 2B, a recess is formed in the absorption adapter 8 so as to extend over both the through holes 9 to provide the housing portion 7.
The connection compound 5 may accumulate in the accommodating portion 7.

[0033]

According to the compression sleeve for connecting electric wires of the present invention, since the connection compound 5 filled in the compartments 3 and 4 of the metal pipe 1 does not flow out during compression work, the connection compound 5 is wiped off. Work is unnecessary,
In addition, the outflowing connection compound 5 does not lean down and pollute nearby roads and sidewalks. Also, there is no risk of soiling the clothes of the workers.

[Brief description of the drawings]

1A is a front view showing an embodiment of a compression sleeve for electric wire connection of the present invention, FIG. 1B is a right side view of FIG.
(C) is a perspective view of the absorption adapter inserted into the compression sleeve for electric wire connection of (a).

FIG. 2 is a perspective view of a compression sleeve for electric wire connection shown in FIG. 1;

3 (a) to 3 (d) are explanatory views showing various examples of an absorption adapter inserted into the compression sleeve for electric wire connection of FIG. 1 (a).

FIGS. 4A and 4B are explanatory views showing various examples of caps attached to the electric wire connection compression sleeve of FIG. 1A.

FIG. 5A is an explanatory view showing another embodiment of the absorption adapter attached to the compression sleeve for electric wire connection of the present invention,
(B) is explanatory drawing which shows another Example of the absorption adapter attached to the compression sleeve for electric wire connection of this invention.

FIG. 6 is a perspective view showing the structure of a conventional compression sleeve.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal pipe 2 Partition wall 3 Compartment room 4 Compartment room 5 Connection compound 7 Accommodating part 8 Absorption adapter 9 Through hole 10 Opening 11 Opening 12 Cap 13 Cap 15 Thin film part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-160588 (JP, A) JP-A-2-18877 (JP, U) JP-A 51-103683 (JP, U) JP-A 58- 130366 (JP, U) Japanese Utility Model Application No. 53-161290 (JP, U) Japanese Utility Model Application No. 2-117664 (JP, U) Japanese Utility Model Application No. 49-79780 (JP, U) (58) Field surveyed (Int. ⁷ , DB name) H01R 4/20 H01R 4/70

Claims (5)

(57) [Claims] 1. A metal pipe 1 is partitioned in the axial direction by a partition wall 2 to form partition chambers 3 and 4 on both sides of the partition wall 2, and a connection compound 5 is filled in each of the partition chambers 3 and 4.
An electric wire is inserted into each of the compartments 3 and 4, and the two electric wires are joined with the partition wall 2 interposed therebetween. In this state, the metal pipe 1 is compressed to connect the two electric wires. 4, a compression sleeve for connecting electric wires, wherein an absorption adapter 8 having a housing portion 7 for absorbing the connection compound 5 which is pressed toward the partition 2 at the time of the compression is disposed on the partition 2 side in 4. 2. The compression sleeve for electric wire connection according to claim 1, wherein a through hole 9 is opened in the peripheral wall of the compartments 3, 4. 3. The inside of the metal pipe 1 is partitioned in the axial direction by a partition wall 2 to form partition chambers 3 and 4 on both sides of the partition wall 2, and a through hole 9 is opened in the peripheral wall of each of the partition chambers 3 and 4. Each of the compartments 3 and 4 is filled with the connection compound 5, an electric wire is inserted into each of the compartments 3 and 4, and the two electric wires are joined together with the partition wall 2 interposed therebetween. In the compression sleeve for connecting electric wires, an absorbing adapter 8 having an accommodating portion 7 for absorbing the connection compound 5 which is pressurized during the compression and flows out from the through hole 9 is attached to the outer periphery of each of the compartments 3 and 4. A compression sleeve for connecting wires. 4. The compression sleeve for connecting an electric wire according to claim 1, 2 or 3, wherein both ends of the metal pipe 1 are opened.
1, caps 12 and 13 are attached,
13. A compression sleeve for connecting an electric wire, wherein a slit through which an electric wire can be formed is formed in 13. 5. The compression sleeve for connecting an electric wire according to claim 1, 2 or 3, wherein both ends of the metal pipe 1 are opened.
1, caps 12 and 13 are attached,
13. A compression sleeve for connecting an electric wire, wherein a thin film portion 15 through which the electric wire can penetrate and penetrates is formed.