JPH0321169Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a cable junction box, and more specifically, to a cable junction box that can maintain a cable connection part in a sealed state.

[Conventional technology]

The connection portion of the cable is kept airtight and liquid-tight by a sealing junction box as required.

The structure of a conventional hermetic junction box used for this purpose will be explained with reference to FIGS. 2 and 3.

Clamp members 41, 41 are fixed to both sides of the connecting portion 11 of the cable 1, respectively, and a connecting member 42 is attached extending across both the clamp members 41, 41 along the longitudinal direction of the cable. The clamp member 41 and the connecting member 42 constitute the connecting fitting 4 as a whole, and the connecting fitting 4 protects the connecting part 11 of the cable 1 from external mechanical forces such as tensile force and compressive force applied thereto. have the effect of

A pair of shell-shaped seal cases 2, 2, which are formed by dividing a hollow cylinder into two in one plane including its central axis, are arranged surrounding this connection fitting 4, and both ends of the pair of seal cases 2, 2 are arranged. End face plates 3, 3 consisting of a pair of rubber semicircular members are fitted into the inner groove via a seal member 31, and a pair of seal cases 2, 2 and seal members 3 are placed on both sides thereof.
A sealing junction box consisting of end plates 3, 3 fitted through 1 is arranged so as to surround the connecting part 11 of the cable 1 and the connecting fitting 4, and the end plates 3, 3
A sealing member 32 is interposed between the groove provided on the inner periphery of the cable 1 and the cable 1, and the presser fitting 5 is superimposed on the outer surface of the flanged semicircular boss in the pair of rubber semicircular members constituting the end plate 3. The pair of rubber semicircular members are fastened together by bolts 6 via a presser fitting 5, and the flanges of the pair of seal cases 2, 2 are fastened together by bolts 7.

A seal member 31 seals between the pair of seal cases 2, 2 and the end plate 3, and a seal member 32 seals between each end plate 3 and the cable 1. The space between the cable 1 and the sealing junction box made up of a pair of end plates 3, 3 is maintained in a liquid-tight and air-tight state.

[Problem to be solved]

However, when the connection part of the cable 1 is submerged in water and pressure P is applied to the cable junction box from the axial direction as shown in the figure, the end plates 3 on both sides move inward as shown by broken lines. There were drawbacks such as the bending and deformation, which impaired the sealing condition of the junction box and allowed outside water to enter.

[Means for solving problems]

This invention was made in order to solve this drawback, and aims to keep the cable junction box sealed by preventing the end plate from being bent in the axial direction. in particular,
A connection fitting consisting of a clamp member fixed to the cable on both sides of the cable connection part and a connection member that connects and fixes both clamp members to each other, and a connection fitting having a shape in which a hollow cylinder is divided in a plane including its central axis. A cable junction box comprising a pair of seal cases surrounding a metal fitting and a sealed junction box comprising an end plate attached to both axial ends of the seal case via a seal member, wherein both axial ends of the connection fitting are provided. The present invention provides a cable connection box characterized in that a deformation prevention protrusion is provided oppositely and in close proximity to the end plate.

[Effect]

The deformation prevention protrusions provided on the connection fitting and close to the end plate prevent deformation of the end plate from the inside, thereby preventing deformation of the end plate beyond a certain level and maintaining the sealed state of the cable junction box. It can be done.

〔Example〕

An embodiment of this invention will be described with reference to FIG.

The configuration of FIG. 1 is substantially the same as the prior art described in detail with respect to FIG. 2, with only some differences.

That is, the connecting member 4 of the connecting fitting 4 is characterized in that a portion of the connecting member 42 or the clamping member 41 is provided with a deformation prevention protrusion 43 that extends in the longitudinal direction of the cable and faces and approaches the inner surfaces of the end plates 3, 3.

Two deformation prevention protrusions 43 are provided at equal circumferential positions of the end plate 3 between the seal case 2 and the cable 1, and preferably three or more are provided at equal circumferential positions of the end plate 3. The tip may be in contact with the inner surface of the end plate 3 from the beginning. If the tip of the deformation prevention protrusion 43 is not in contact with the inner surface of the end plate 3 and is away from the inner surface of the end plate 3, the distance is not limited to the deformation that is allowed so that the end plate 3 does not break the sealed state. Should be within the amount.

With the above configuration, even if the cable junction box is submerged in water and an axial pressure P is applied to the end plate 3, the end plate 3 tends to curve inwardly.
It collides with and is supported by the deformation prevention protrusion 43, preventing further deformation and keeping the cable junction box sealed.

〔effect〕

According to this invention, (1) provided in the connecting fitting 4,
The deformation prevention protrusions 41 facing and close to the end plate 3 prevent deformation of the end plate from the inside, thereby preventing deformation of the end plate 3 beyond a certain level and maintaining the sealed state of the cable junction box. Moreover, (2) the conventional sealing junction box can be used as is by simply providing the deformation prevention protrusion 43 on the cable connection fitting 4.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view showing a cable junction box according to an embodiment of the invention, FIG. 2 is a longitudinal side view of a conventional cable junction box, and FIG. 3 is a front view thereof. 1... Cable, 2... Seal case, 3...
End plate, 4... Connection fitting, 43... Deformation prevention protrusion.

Claims (1)

[Scope of utility model registration request] A connecting fitting 4 consists of a clamp member 41 fixed to the cable on both sides of the cable connecting part 11, and a connecting member 42 that connects and fixes both clamp members to each other, and a hollow cylinder is divided in a plane including its central axis. a pair of seal cases 2 which have a shape and surround the connection fittings 4;
2 and an end plate 3 attached to both ends of the seal case in the axial direction via a seal member 31,
3, wherein deformation prevention protrusions 43 are provided at both ends of the connecting fitting 4 in the axial direction so as to face and be close to the end plates 3, 3.