JPH0479207B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cable connection section that connects a plurality of cables within a connection box.

[Prior Art] In this type of conventional cable connection part, as shown in FIG. 6, in order to seal the cable entry port 2 of the junction box 1, the cable entry port 2 is provided with a two-part material made of rubber or the like. The end plate 3 of the structure is airtightly fitted with a sealing material 4 interposed therebetween, and a sealing material 7 is interposed between the cable through hole 5 of the end plate 3 and the cable 6 to perform sealing.

However, such a cable connection has a problem in that the sealing material 7 cold-flows due to the gas pressure in the connection box, leading to gas leakage.

In order to solve this problem, a cable connection section has recently been proposed in which sealing washers for sealing the sealing material are respectively locked in the washer locking grooves at both ends of the cable through hole of the end plate (Japanese Patent Application Laid-Open No. 55
−13653).

By locking the sealing washers at both ends of the cable through hole in the end plate in this way, even if the gas pressure inside the junction box acts, the sealing material will be dammed by the sealing washers and cold flow will be prevented. be able to.

[Problems to be Solved by the Invention] However, in the conventional cable connection part using such a sealing washer, the sealing washer is ring-shaped and is fitted from the end of the cable so that the sealing washer is not attached to the cable. Since the sealing washer is attached to the cable, the sealing washer cannot be removed from the cable after the cable connection is formed, and therefore, the sealing washer cannot be replaced during maintenance of the cable connection. It was hot.

In addition, since the ring-shaped sealing washer has a structure in which only its outer periphery is supported, when pressure is applied from the end plate to the sealing material between these sealing washers, the sealing washer The problem was that it bulged in a convex shape on the circumferential side, resulting in poor stability and the pressure applied to the sealing material escaping.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cable connection section equipped with a sealing washer that allows easy replacement of the sealing washer and that can stably receive pressure from a sealing material even if the pressure is high.

[Means for solving the problems] The structure of the present invention for achieving the above object is as follows:
The present invention will be explained with reference to FIGS. 1 to 5, which correspond to embodiments. A plurality of cables 6 to be connected are drawn into a junction box 1, and a An end plate 3 is airtightly attached to the cable entry port 2 of the junction box 1, and a sealing material 7 is interposed between the cable through hole 5 of the end plate 3 and the cable 6, so that the cable of the end plate 3 At the cable connection part, sealing washers 9 for sealing the sealing material 7 are respectively locked in the washer locking grooves 8 at both ends of the through hole 5. It has a flange portion 9B at one end and a cut 9C at one location in the circumferential direction of the washer body 9A.
is provided including the flange portion 9B, and the outer periphery of the flange portion 9B is similar to the end plate 3.
The washer main body 9A is fitted into the washer locking groove 8, and the inner circumferential surface of the washer main body 9A is in contact with the outer circumference of the cable 6, and the outer circumferential surface thereof is in contact with the inner circumferential surface of the cable through hole 5 of the end plate 3. It is characterized by being held in contact with the.

[Function] As described above, the sealing washer 9 has a flange portion 9B at one end of the cylindrical washer body 9A, and a cut 9C is provided at one location in the circumferential direction of the washer body 9A, including the flange portion 9B. If such a structure is used, the sealing washer 9 can be easily replaced even after the core wire connection portion 16 is formed by utilizing the cut 9C.

Also, the outer circumference of the flange portion 9B is fitted into the washer locking groove 8 of the end plate 3, the inner circumferential surface of the washer body 9A is brought into contact with the outer circumference of the cable 6, and the outer circumferential surface of the washer body 9A is connected to the washer locking groove 8 of the end plate 3. When the sealing washer 9 comes into contact with the inner circumferential surface of the through-hole 5, even if pressure is applied from the sealing material, the sealing washer 9 will not deform significantly and release the pressure applied to the sealing material 7, as in the conventional case. 9 stability will be improved.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 5. Note that parts corresponding to those in FIG. 6 described above are designated by the same reference numerals.

As shown in the figure, in the cable connection part of this embodiment, washer locking grooves 8 are provided at both ends of the cable through hole 5 of each end plate 3.
A sealing washer 9 made of rubber or the like is fitted and secured to each of the holes.

The sealing washer 9 has a flange portion 9B at one end of the cylindrical washer body 9A, and a cut 9C is provided at one location in the circumferential direction of the washer body 9A, including the flange portion 9B, to adjust the circumference. By doing so, it can be adapted to the outer diameter of the cable 6.

The sealing washer 9 has a flange portion 9
The outer periphery of B is fitted into the washer locking groove 8.
Further, the washer main body 9A has its inner circumferential surface in contact with the outer circumference of the cable 6, and its outer circumferential surface in contact with the end plate 3.
The cable is held in contact with the inner circumferential surface of the cable through hole 5. This stabilizes the posture of the sealing washer 9 and prevents it from coming off.

The end plate 3 divided into two parts is integrally connected by a fastener 10 and a fastening bolt 11. The cables 6 on both sides are connected to each other within the junction box 1 by a connecting fitting 12. Junction box 1 is also split into two,
A sealing material 13 is interposed at the joint, and the bolt 14 and nut 15 are integrated. The mutual core wires of the cable 6 are connected to each other at a core wire connection portion 16 within the junction box 1 . The junction box 1 is filled with gas.

In such a cable connection part, a sealing material 7 between the inner circumference of the end plate 3 and the outer circumference of the cable 6 is used.
is dammed by sealing washers 9 arranged at both ends thereof, so even if the pressure inside the junction box 1 is applied, cold flow will not occur.

Furthermore, the sealing washer 9 has a structure in which a cylindrical washer body 9A has a flange part 9B at one end, and a cut 9C is provided at one location in the circumferential direction of the washer body 9A, including the flange part 9B. When used, the sealing washer 9 can be replaced by using the cut 9C at the core connection part 1.
This can be easily carried out even after forming 6.

Furthermore, the outer circumference of the flange portion 9B is fitted into the washer locking groove 8 of the end plate 3, the inner circumferential surface of the washer body 9A is brought into contact with the outer circumference of the cable 6, and the outer circumferential surface of the washer body 9A is connected to the cable of the end plate 3. When the washer main body 9A is held in contact with the inner circumferential surface of the through hole 5 by the inner circumference of the end plate 3 and the outer circumference of the cable 6, even if pressure is applied from the sealing material 7, the sealing washer 9 is Therefore, the sealing washer 9 does not release the pressure of the sealing material 7, and the stability of the sealing washer 9 is improved.

In the above embodiment, the case where one cable 6 passes through the end plate 3 has been described, but it goes without saying that the present invention can also be applied to a cable connection section in which a plurality of cables 6 pass through the end plate 3.

[Effects of the Invention] As explained above, according to the cable penetration portion according to the present invention, the following effects can be obtained.

(1) If a sealing washer is used that has a flange portion at one end of a cylindrical washer body and a cut is provided at one location in the circumferential direction of the washer body, including the flange portion, the cut By using this, the sealing washer can be easily replaced even after forming the core wire connection portion, and maintenance etc. can therefore be easily performed.

(2) Fit the outer periphery of the flange part into the washer locking groove of the end plate, the inner circumferential surface of the washer body abuts the outer circumference of the cable, and the outer circumferential surface of the washer body fits into the inner circumferential surface of the cable through hole of the end plate. When the washer body is held between the inner periphery of the end plate and the outer periphery of the cable, even if pressure builds up from the sealing material,
The sealing washer does not deform as much as in the past, and therefore the sealing washer does not release the pressure of the sealing material, improving the stability of the sealing washer.

[Brief explanation of the drawing]

Fig. 1 is an enlarged cross-sectional view of the main part showing one embodiment of the cable connection part according to the present invention, Fig. 2 A and B are a side view and a front view of the sealing washer used in this embodiment, and Fig. 3 FIGS. 4 and 5 are perspective views showing the installation process of the end plate in this embodiment; FIGS. 1 is a vertical cross-sectional view of a main part of a conventional cable connection section. 1... Connection box, 2... Cable entry port, 3...
End plate, 5... Cable through hole, 6... Cable, 7... Seal material, 8... Washer locking groove, 9
... Sealing washer, 9A... Washer body, 9B... Flange section, 9C... Cut.

Claims (1)

[Scope of Claims] 1. A plurality of cables to be connected are drawn into a junction box, and an end plate is airtightly attached to a cable inlet of the junction box through which the cables are drawn into the junction box. A sealing material is interposed between the cable through hole and the cable, and sealing washers for damming the sealing material are respectively locked in each washer locking groove at both ends of the cable through hole of the end plate. In the cable connection section, the sealing washer has a flange portion at one end of a cylindrical washer body, and a cut is provided at one location in the circumferential direction of the washer body, including the flange portion. The outer periphery of the flange portion is fitted into the washer locking groove of the end plate, and the inner periphery of the washer body is in contact with the outer periphery of the cable, and the outer periphery of the washer body is in contact with the outer periphery of the cable. A cable connection portion, characterized in that the cable connection portion is held in contact with an inner circumferential surface of the cable through hole.