JPS5925089Y2 - Conductor connection device - Google Patents

Description

[Detailed description of the invention] The purpose of this invention is to reduce the number of parts, facilitate assembly and processing, and reduce the cost of a conductor connecting device that connects a connecting conductor to an internal conductor. do.

The conventional conductor connection device, as shown in Fig. 1a, t), forms a circular through hole 2 in a support 1 such as a support insulator,
An internal conductor 4 in the shape of a round bar made of copper or the like with a threaded portion 3 formed at the tip is attached to the through hole 2, and the threaded portion 3 is inserted into the through hole 2. ring-shaped cushion 5
, 5', then tighten the conductor connection nut 6 to the threaded part 4.
and tighten the crack 6 of the connecting nut 6 with the tightening bolt 7.
' to firmly fix the connecting nut 6 to the internal conductor 4, then insert the through hole 9 of the connecting conductor 8 into the threaded part 3 to abut the connecting conductor 8 against the connecting nut 6, and then tighten the ring-shaped After inserting the flat washer 10 into the threaded portion 3, a tightening nut 11 is screwed onto the threaded portion 3 and tightened, thereby connecting the connecting conductor 8 to the internal conductor 4.

Therefore, the internal conductor 4 and the connecting conductor 8 are connected via the connecting nut 6.

However, the conventional device requires many parts such as the connecting nut 6 and the tightening nut 11 in addition to the side conductor 4.degree. 8, making the processing complicated and very expensive.

Furthermore, since another object is interposed between the side conductors 4 and 8, the contact resistance increases and there is a greater chance of overheating.
It has the disadvantage of being extremely unreliable.

Another conventional conductor connection device is shown in FIG. 2a.

As shown in b, the internal conductor 15 with the threaded portion 14 formed at the tip is attached to the through hole 13 of the support 12, the cushion 16 is inserted into the threaded portion 14, and the connecting conductor 17 is screwed into the threaded portion 14. Then, tighten the crack 18 at the tip of the connecting conductor 17 with the tightening bolt 19, and then tighten the inner conductor 15.
The connecting conductor 17 is firmly fixed to.

Therefore, since the connecting conductor 17 is directly attached to the inner conductor 15, its contact resistance is reduced.
Contact reliability is not compromised.

However, since the connecting conductor 17 of this device is tightened by a tightening bolt 19, it is necessary to increase the plate thickness at least at the connecting portion, which has the drawback of increasing the number of processing steps.

Furthermore, the same device of FIGS. 1 and 2 has a connecting conductor 8,
17 to the supports 1, 12, the connecting conductors 8, 17
When a strong rotational force is applied to the connecting conductors 8 and 17, the inner conductor 4
, 15, and there is a disadvantage that the connection is unreliable.

This invention was devised in consideration of the drawbacks of the conventional art, and will now be described in detail with reference to FIG. 3 showing one embodiment thereof.

In FIG. 3, 20 is a support such as a support insulator, 21 is an internal conductor embedded and attached to the support 20, and 22 is a spherical head formed at the tip of the internal conductor 21. It is projected and exposed on the planar surface of 20.

23 is a connecting conductor, 24 is a round hole formed in the connecting conductor 23 and having a diameter slightly smaller than the diameter of the internal conductor 21, and the entire peripheral edge 24' of the lower end thereof is uniformly abutted against the head 22, A connecting conductor 23 is brought into contact with the support 20 .

25.25 is a bolt for fixing the connecting conductor 23 to the support 20, and the head 22 of the internal conductor 21 is in strong contact with the entire peripheral edge 24' of the lower end of the round hole 24 of the connecting conductor 23.

Therefore, according to the above embodiment, the bolt 25 is the only necessary part other than the side conductors 21 and 23, so the number of parts can be extremely reduced, the device can be downsized, and the number of parts can be reduced. The number of processing steps can also be reduced and the cost can be reduced.

In addition, since the side conductors 21 and 23 are connected by direct contact, the contact resistance is reduced, and further,
Since the two bolts 25 can firmly fix the connecting conductor 23 and prevent the connecting conductor 23 from rotating, a very reliable connection can be obtained.

By the way, since the contact of the side conductors 21, 23 is a line contact between a part of the head 22 and the entire circumferential edge 24' of the lower end of the round hole 24, the length of the line can be changed by changing the diameter of the round hole. In addition, the contact pressure of the side conductors 21 and 23 can be adjusted by appropriately selecting the size and number of bolts 25.
Necessary contact pressure can be obtained.

As described above, according to the conductor connection device of this invention, a spherical head is formed at the tip of the round bar-shaped internal conductor from the flat surface of the support, and the head protrudes to connect the internal conductor to the support. A round hole with a diameter slightly smaller than the diameter of the internal conductor is formed in the connecting conductor, the entire periphery of the lower end of the round hole is in contact with the head, and the connecting conductor is fixed to the support with at least two bolts. By doing so, the number of parts can be reduced, the number of processing steps can be reduced, and the device can be made smaller and very inexpensive.

Furthermore, even if rotational force is applied to the connecting conductor, the rotation of the connecting conductor is prevented by at least two bolts, the bolts do not loosen, and the side conductor is securely connected, greatly increasing its reliability. can be improved.

[Brief explanation of the drawing]

1 and 2 show a conventional conductor connecting device, in which a is a plan view, b is a cutaway front view, and FIG. 3 is a cutaway front view of one embodiment of the connecting device of the present invention. 20...Support body, 21...Inner conductor,
22... Head, 23... Connection conductor, 2
4...Round hole, 25...Bolt.

Claims (1)

[Scope of utility model registration request] A spherical head is formed at the tip of a round bar-shaped internal conductor, the head protrudes from the flat surface of the support and is attached to the internal conductor, and the connecting conductor has a diameter slightly smaller than the diameter of the internal conductor. a round hole is formed, the entire periphery of the lower end of the round hole is brought into contact with the head, and the connecting conductor is attached to the support body at least twice.
A device for connecting conductors fixed with bolts.