JPS6122538B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seal block that is to be installed to maintain liquid tightness between a cable connection box and a cable.

Conventionally, various means have been used to maintain liquid tightness at both ends of the junction box of the cable connection section. In one prior art, this sealing means was formed by wrapping a sealing tape onto the cable. but,
In this conventional technique, the sealing tape is wound up to a large diameter, which is time-consuming, and it is also difficult to apply sufficient pressure between the junction box and the cable portion, making it impossible to maintain liquid tightness. In other conventional techniques, the sealing means consists of a cylindrical sealing material divided into two parts, but the disadvantage of this is that it is troublesome to adjust the diameter because the hole in the sealing material needs to be adjusted to match the diameter of the cable. It is.

SUMMARY OF THE INVENTION An object of the present invention is to provide a seal block for a cable connection part that can be easily attached to suit various cable diameters and has a high liquid-tight effect.

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a sealing block 10 according to the present invention, which seals at both ends of a junction box 36, as will be described later with reference to FIG. The case 14 includes two semi-cylindrical halves 12 disposed inside the cylinder, and a multilayer sealing material 16 fitted into each semi-cylindrical half.

Each semi-cylindrical half 12 of the case 14 is made of plastic, and has two inner circumferential grooves 12a' and 12b near both ends of its inner circumferential surface, and a wide outer circumferential groove 12c on its outer circumference. There is. case 14
further includes seal plates 18, 18' made of plastic with holes, which are engaged in the opposing inner circumferential grooves 12a, 12b of the two semi-cylindrical halves 12;
2 and the seal plates 18, 18' constitute a peripheral wall and an end wall. In addition, in Fig. 1, one semi-cylindrical half part 1
2 is shown, but the other semi-cylindrical half is of identical configuration except that it is symmetrical. Further, in FIG. 1, reference numerals 18a and 18'a
are holes in the seal plates 18, 18' through which the cables are to pass.

The multilayer sealant 16 is made of rubber or plastic, and in the illustrated embodiment, as shown in FIG.
It consists of three layers of sealing material 16A, 16B, and 16C. These sealing materials 16A, 16B, 16
As shown in FIG. 1, the sealing materials 16C are overlapped with each other and fitted into each half of the case 14, and the innermost sealing material 16C is inserted into the holes 18a and 18a of the sealing plates 18 and 18'.
It has an axial groove 20 approximately matching the diameter of 18'a. This groove is located in the sealing material 16C in the other half.
A hole through which the cable passes is formed together with the groove. Positioning means 22 is formed between adjacent sealing materials 16A and 16B, and between 16B and 16C, and this positioning means includes projections 24 formed on the inner surface of each sealing material, as shown in FIGS. and a recess 26 formed on the outer surface of the sealing material inside the recess 26 into which the protrusion 24 is inserted. As shown in Figure 4,
Each of the sealing materials 16A, 16B, and 16C preferably has an adhesive layer 28 on its outer surface, and these adhesive layers are covered with a release paper 30 (not shown) (see FIG. 5).

Next, referring to FIGS. 5 and 6, we will describe how this seal block is used. One, two, or all sealing materials are used depending on the diameter of the cable 32 to be connected. The release paper 30 is peeled off and overlapped to fit within each half 12 of the case 14. In addition, the seal plates 18 and 18' are provided with holes 18a and 18'a, either as they are or cut with a file etc., in accordance with the cable diameter and passed through the cable 32 in advance.
It engages into the inner circumferential grooves 12a and 12b of No.2. If the diameter of the cable 32 does not match the diameter of the sealing material used, the diameter is adjusted by wrapping a sealing tape 34 over the cable 32 as shown in FIG. Finally, a tightening tape (not shown) is wrapped around the outer circumferential groove 12c of the case 14 and pressurized. After the seal block 10 is attached to the cable 32 under pressure in this manner, the connection box 36 covering the cable connection portion 32a is attached to the seal block 10 as shown in FIG.
The cable connection portion 38 is formed by connecting the cable connection portion 38 to the cable connection portion 38 by appropriate means.

FIG. 6 shows another embodiment of the present invention, in which every other seal member 16A, 16C is integrally molded with a thin end wall 40 at one end edge in the axial direction; Similarly, the sealing materials 16B and 16D are integrally molded with a thin end wall 40'. In this embodiment, if the sealing material 16D is not needed to match the cable diameter, for example, it is torn off from the thin end wall 40' and another sealing material is superimposed thereon. In this embodiment, the end faces are relatively smoothly aligned compared to the previous embodiment, so that the liquid tightness is further improved.

According to the present invention, as described above, the seal block is made up of a plurality of sealing materials that are multi-layered and polymerized within the case disposed inside both ends of the junction box. Since it can be easily adjusted to the cable diameter, on-site work is significantly simplified and work efficiency is improved, and since the sealing material is pressurized by tightening the case, it is possible to maintain sufficient liquid tightness to the cable. This makes it possible to reliably prevent liquid from entering between both ends of the connection box and the cable.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a part of the cable connection seal block according to the present invention, Fig. 2 is an exploded perspective view thereof, Fig. 3 is a perspective view of one sealing material, and Fig. 4 is a perspective view of adjacent sealing materials. FIG. 5 is an explanatory view of the seal block of the present invention in use, FIG. 6 is an exploded perspective view of a sealing material of another embodiment of the present invention,
FIG. 7 is a schematic cross-sectional view of a cable connection using the seal block of the present invention. 10... Seal block, 12... Semi-cylindrical half, 12a, 12b... Inner circumferential groove, 12c... Outer circumferential groove, 14... Case, 16, 16A, 16B, 1
6C, 16D... Sealing material, 18, 18'... Seal plate, 18a, 18'a... Hole, 22... Positioning means, 28... Adhesive layer, 30... Release paper, 3
2...Cable, 32a...Cable connection part,
36... Connection box, 38... Cable connection part.

Claims (1)

[Scope of Claims] 1. A cable connection seal block that is installed between both ends of a connection box that covers a cable connection portion and a cable so that the connection box is connected to the cable in a liquid-tight manner, A case consisting of two semi-cylindrical halves disposed inside both ends of the junction box, a semi-cylindrical multilayer sealing material fitted into each half of the case, and two semi-cylindrical halves of the case. A seal block for a cable connection portion, characterized in that it is equipped with a tightening means for tightening. 2. The cable connection seal block according to claim 1, wherein the case includes a seal plate with a hole that is inserted into inner circumferential grooves on opposite sides of two semi-cylindrical halves. 3. The cable connection seal block according to claim 1 or 2, wherein positioning means are provided on opposing surfaces of adjacent sealants of the multilayer sealant. 4. Claim 1, wherein each of the multilayer sealing materials has an adhesive layer covered with a release paper on one surface.
A seal block for a cable connection portion according to any one of items 1 to 3. 5. The cable connection portion according to any one of claims 1 to 4, wherein every other sealing material of the multilayer sealing material is integrally formed with a thin end wall at one end edge in the axial direction. seal block. 6. The cable connection seal block according to any one of claims 1 to 5, wherein the tightening means is a tightening tape wrapped around the outer circumferential groove of the case.