JPH0134504Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a compression sleeve configured to be detachable for connecting jumper wires and the like.

It is difficult to connect jumper wires that connect the respective detent ends of overhead wires at high places on utility poles using compression sleeves because the jumper wires are located at high places. It has been difficult to compress accurately and quickly obtain a good connection.

In addition, when the jumper wire is aluminum stranded wire, an oxide film is easily formed on the surface of the aluminum wire, so the compression connection work must be completed quickly before the oxide film is formed. required skill.

In view of the above-mentioned points, the present invention makes it possible to perform the connection work quickly by dividing the compression sleeve into a detachable structure, and
The present invention provides a removable compression sleeve that can provide a good connection for aluminum electric wires. The configuration will be explained below using illustrated embodiments.

Figures 1 to 3 show the male compression sleeve of the present invention, Figures 4 to 6 show the female compression sleeve, and Figure 7 shows the combination of the male and female compression sleeves of the present invention. This figure shows a removable compression sleeve.

Male compression sleeve 1 shown in Figures 1 to 3
consists of a first compression sleeve part 2 and a male joint part 3, the first compression sleeve part 2 is made of aluminum, and a wire insertion hole 5 is provided at the rear end 4. The rear end 7 of the male joint part 3 made of copper is friction welded to the tip 6 of the sleeve part 2 to connect the tip 6 and the rear end 7.
to be continuous as one. In this pressure welding, the end surfaces of both members are butted against each other, one is fixed, and the other is rotated at high speed, and the end surfaces of both members are pressed together by the frictional heat generated on the contact surface. is made of aluminum and the male joint part 3
Even if they are made of copper, they can be firmly integrated.

The male joint part 3 has a conical insertion part 8 at the tip, and a male thread is provided on the outer periphery of the large diameter part at the rear to form a male thread part 9, and further a rectangular grip part 10 is formed at the rear thereof. do. This square grip part 10 is
As shown in the cross section in Fig. 3, the circumferential surface of the circular part is cut to form a flat surface 11, and this flat surface 11 forms a substantially square shape.The opposing flat surface is held by a gripping tool to prevent rotation. It is something to grasp.

Female compression sleeve 2 shown in Figures 4 and 5
0 is the second compression sleeve part 2 made of aluminum
1, a female joint part 22 made of copper, and a tightening tube 23, the compression sleeve part 21 is provided with an electric wire insertion hole 25 that opens at the rear end 24, and the end 26 is provided with a wire insertion hole 25 that opens at the rear end 24. The ends 27 are frictionally welded to make the front end 26 and rear end 27 integrally continuous.

The female joint portion 22 is provided with a conical hole 29 opening at its distal end surface 28. This conical hole 29 is for inserting and fitting the conical insertion portion 8 of the male joint portion 3 described above, and the large diameter side of the conical hole 29 opens at the distal end surface 28 . Further, a stepped portion 30 is provided protrudingly on the outer peripheral surface of the female joint portion 22, and this stepped portion 3
A stopper 31 is provided so as to protrude and be opposed to the stopper 0 and spaced apart from each other. The stopper 31 is formed by a retaining ring formed in a substantially Ω-shape as shown in FIG.
In order to fit into the circumferential groove, both end pieces 32 are opened against the elasticity of the retaining ring. Note that this stopper 31 is attached after a tightening tube 23, which will be described later, is inserted into the female joint portion 22.

The tightening tube 23 has a female threaded portion 3 on the inner circumferential surface of the tip.
4, the inner circumferential surface of the deep inner cylindrical portion of the female threaded portion 32 is formed to a diameter that allows it to be fitted and slid onto the outer circumferential surface of the front half of the female joint portion 22, and a hooking portion 33 is provided at the rear end. establish. This engaging portion 33 has an inner edge formed into a circular hole, and the diameter of the circular hole is set to a diameter into which the small diameter portion of the female joint portion 22 is fitted, so that the inner surface of the engaging portion 33 is formed into a circular hole. 22, and the outer surface of the engaging part 33 is engaged with the step part 30 on the outer periphery of the stopper 3.
Make it multiplied by 1. If the thus formed tightening tube 23 is fitted onto the outside of the female joint 22 as shown in the fourth figure and the stopper 31 is attached as described above, the engaging portion 33 of the tightening tube 23 will be connected to the female joint. Since it is placed between the stepped portion 30 on the outer periphery of the portion 22 and the stopper 31, the tightening cylinder 23 and the female joint portion 22 are connected without coming apart. Note that the outer peripheral surface of the tightening tube 23 has a circular outer circumferential surface cut out to form a flat surface 34, as shown in cross section in FIG. , and is formed into a substantially rectangular shape by this plane 34.

The male compression sleeve 1 and the female compression sleeve 20 configured as described above are combined as shown in Figure 7 to connect the jumper wires A ₁ and A ₂ . Leave the sleeve 20 separate without combining it, and connect one side of the jumper wire to be connected.
Compression connect the tip of A ₁ to the first compression sleeve part 2 of the male compression sleeve 1, and connect the other jumper wire.
The distal end of A ₂ is compressively connected to the second compression sleeve section 21 of the female compression sleeve 20 . For this compression connection, both jumper wires made of stranded aluminum wire are used.
Polish the outer peripheral surface of each tip of A ₁ and A ₂ with a brush to remove the oxide film, apply anti-corrosion compound mixed with conductive powder such as aluminum powder, insert into the wire insertion hole of the compression sleeve, and compress. The outer periphery of the sleeve part is compressed using a compression die to connect the sleeve parts, and this work can be easily carried out since each end of both jumper wires A ₁ and A ₂ can be handled freely.

Both jumper wires A ₁ and A ₂ should be connected like this
The male compression sleeve 1 and the female compression sleeve 20 are compressed and connected, and then both the male and female compression sleeves are connected at a high place on the utility pole as shown in FIG. This connection is achieved by inserting the conical insertion portion 8 provided at the tip of the male joint 3 of the male compression sleeve 1 into the conical hole 29 opened at the tip of the female joint 22 of the female compression sleeve 20. , the female threaded portion 32 of the tightening tube 23 is screwed into the male threaded portion 9 of the male joint portion 3.
When this tightening cylinder 23 is strongly screwed, the engaging part 33 at the rear end of the tightening cylinder engages with the stepped part 30 of the female joint part 22, so that the conical insertion part 8 and the conical hole 29 are engaged with each other.
The bonding surfaces of the two are in strong contact and a good electrical connection can be obtained. When screwing together the tightening cylinder 23 and the male threaded part 9 of the male joint part 3, the square grip part 1 of the male joint part 3 is screwed together using a gripping tool.
Since it is only necessary to grasp and fix the bolt 0 and rotate only the tightening tube 23, both jumper wires A ₁ and A ₂ do not rotate and are not twisted.

As described above, the jumper wire can be connected at a high place on a utility pole by simply screwing the tightening tube 23 onto the male threaded part 9 of the male joint part 3 and tightening the conical insertion part 8 of the male joint part 3. The joint surfaces of the conical hole 29 of the female joint part 22 are in strong contact with each other, but after a long period of time, this joint surface becomes so crimped that it cannot be easily separated, and it is necessary to separate it at a high place on the utility pole. requires a large separation force. Therefore, if the tightening tube 23 is rotated in the opposite direction to the above-mentioned screw tightening, the engaging portion 33 at the rear end of the tightening tube 23 is received by the stopper 31 and the female joint portion 2
2, the male threaded part 9 of the male joint part 3 is pushed out in response to the reverse rotation of the tightening tube 23, and therefore the conical insertion part 8 and Even if the joint surfaces of the conical hole 29 are strongly pressed together, the two can be easily separated. In addition, when rotating the tightening tube 23 in the reverse direction, the rectangular gripping portion 10 of the male joint portion 3 is gripped and fixed with a gripping tool, and the tightening tube is rotated with the gripping tool.

In the above embodiment, the first and second compression sleeve parts 2 and 21 were made of aluminum in order to connect the aluminum stranded wires, but the compression sleeve parts were made of copper and the male and female parts were made of copper to connect the copper stranded wires. The stopper 31 is formed integrally with the mold joint part and the female mold joint part, and instead of using an Ω-shaped retaining ring as shown in the figure, the stopper 31 is engaged with the rear end of the tightening tube 23. Appropriate means can be adopted to prevent the retreat.

As described in detail above, according to the present invention, the compression sleeve is divided into detachable parts, and the first and second compression sleeve parts 2 and 21 are compressed and connected in advance to the terminals of the electric wires to be connected. The two wires can be reliably connected simply by fitting the male joint 3 and the female joint 22 and rotating the tightening tube 23, making it easy to connect jumper wires, etc. at high places on utility poles. Even if there is a problem, it can be done extremely easily and quickly. In addition, a stopper 31 is provided to prevent the tightening tube 23 from retreating, and by rotating the tightening tube in the opposite direction and pushing away the male joint portion 3, the conical insertion portion 8
Since the bonding surfaces of the conical hole 29 and the conical hole 29 are separated, even if the bonding surfaces are in an adhesive state, they can be easily separated. Since this joint surface is formed into a conical shape, reliable and good electrical contact can be obtained, and in the connected state, the rear end engaging portion 33 of the tightening tube 23 strongly contacts the stepped portion 30, and the tip of the tightening tube Since it is screwed into the male threaded part 9 of the male joint part 3, there is no risk of rainwater, dust, etc. entering the joint surface of the conical insertion part 8 and the conical hole 29 and contaminating it.

Moreover, the first and second compression sleeve parts 2, 2
By making 1 an aluminum sleeve, the parts in contact with the aluminum stranded wire are made of the same metal, so not only does corrosion not occur, but also the male joint part 3 and the female joint part 22 are made of the same metal.
is made of copper, so when fitting and joining them, there is no need to polish the contact surface immediately before connection, unlike when connecting aluminum conductors, making the connection work easier. The end faces of the mold and female mold joints are friction welded into one piece, so corrosion does not occur.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view of a male compression sleeve of the removable compression sleeve of the present invention, Fig. 2 is a front end view thereof, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a partially sectional front view of the female compression sleeve, Fig. 5 is a rear end view, Fig. 6 is a sectional view taken along the - line in Fig. 4, and Fig. 7 is a detachable compression sleeve of the present invention. 2 is a drawing showing a state in which jumper wires are connected. DESCRIPTION OF SYMBOLS 1...Male compression sleeve, 2...First compression sleeve part, 3...Male joint part, 8...Conical insertion part, 9...Male thread part, 10...Square gripping part, 20
...Female compression sleeve, 21...Second compression sleeve portion, 22...Female joint portion, 23...Tightening cylinder, 2
9... Conical hole, 30... Step part, 31... Stopper, 33... Engagement part.

Claims (1)

[Claims for Utility Model Registration] 1. Comprising a male compression sleeve and a female compression sleeve, the male compression sleeve has a rear end of a male joint having a conical insertion portion at its tip and a first compression sleeve. The female compression sleeve has a large diameter side of the conical hole connected to the distal end surface of the female compression sleeve. The rear end of the female joint, which is opened at The rear end of the tightening tube is provided with a step protruding from the top and a hooking part that engages with the stopper, and the conical insertion part of the male compression sleeve and the conical hole of the female compression sleeve fit together. A removable compression sleeve, characterized in that the male compression sleeve and the female compression sleeve are connected by screwing together the male threaded portion of the male joint portion and the female threaded portion of the tip of the tightening tube. 2. Both the first compression sleeve part and the second compression sleeve part are made of aluminum, and the male joint part and the female joint part are both made of copper, and the tip of the first compression sleeve part and the male joint part are made of copper. The removable compression sleeve according to claim 1, wherein the rear end of the second compression sleeve part is friction welded to the rear end of the female joint part, and the distal end of the second compression sleeve part and the rear end of the female joint part are friction welded to each other.