JP2965088B2 - Method of filling the moisture-proof mixture - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing deterioration of a color-coded polyethylene coated communication overhead cable (hereinafter referred to as CCP cable), and more particularly to a method of filling a cable core joint with a moisture-proofing admixture. About.

[0002]

2. Description of the Related Art In general, it is not necessary to fill a moisture-proofing admixture in a connection portion of a CCP cable or an exposed portion of a core for withdrawing a subscriber, but the aging of the exposed core portion including an insulating coating is required. Filling with the moisture-proofing mixture is performed only when specifically specified to prevent deterioration.

FIG. 4 is a partial longitudinal sectional view of a conventional example of a cable connection portion of a CCP cable.

[0004] In the connection portion of the CCP cable 1, each connected core wire is bundled into one bundle, and the bundle is wound at right angles in the longitudinal direction of the cable 1 by a spacer net 3, and this portion is centered. a pair of half hard plastic case 11 are combined Te, the inlet 11 ₁ is fixed to both end portions so that the top with the adhesive tape 12 is fixed to the cable 1, a two-liquid from the inlet 11 ₁ is mixed The moisture-proof mixture 4 was poured and hardened by natural curing.

[0005]

In the above-mentioned conventional method of filling the moisture-proof mixture, a pair of half-hard plastic cases are used as containers for containing the moisture-proof mixture. Since the size of the cable depends on the outer diameter of the overhead cable, it must be equipped with a number of types of hard plastic cases that can be applied to each size. Even if it is necessary to fill the material, there is no corresponding hard plastic case, so that there is a drawback that the moisture-proof mixture is not filled.

An object of the present invention is to provide a method for filling a moisture-proof mixture which does not require a half-hard plastic case for each size of an overhead cable.

[0007]

According to the method of filling a moisture-proof mixture of the present invention, a space is provided outside the spacer net in which a bundle of cable cores, which are exposed by stripping the sheath, are wound. Surrounded by a self-adhesive soft plastic sheet, two opposing sides of the soft plastic sheet face upward, and the center of the soft plastic sheet is left open, and the entire periphery of the soft plastic sheet is adhered with a predetermined width. Then, both sides perpendicular to the axis of the cable are squeezed onto the cable, the portion is beaten to the cable, and the moisture-proof mixture is injected from the opening of the soft plastic sheet.

[0008]

A self-adhesive soft plastic sheet is formed in a bag shape with an injection port opened in the upper center with the bundle of connected cable cores inserted therein, and a soft plastic sheet perpendicular to the axis of the cable is formed. By squeezing both sides around the cable respectively and pulsing, and pouring the moisture-proof mixture with the injection port slightly raised, without using a pre-formed, half-sized rigid plastic container for each size Filling of the moisture-proof mixture becomes possible.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1, 2 and 3 are explanatory views for different stages of the method for filling a moisture-proof mixture according to the present invention. FIG. 1 is a view showing the situation of a cable connecting portion before a container is attached, and FIG. 2 is an adhesive sheet attached. FIG. 3 is a situation diagram of the cable connection portion at the start, and FIG. 3 is a situation diagram of the cable connection portion during filling of the admixture.

As shown in FIG. 1, a cable connecting portion of this CCP cable is a CCP cable (hereinafter referred to as a cable) 1 which is connected to each other. And a non-conductive spacer net 3 formed by winding the core connecting portion 2 at right angles in the longitudinal direction of the cable 1 along the longitudinal direction of the cable 1. And the end plates 12 are fixed in the vicinity of the respective ends of the cables 1 to be connected, and the end plates 12 are connected to each other by the bottom plate 8 and the connecting rod 9 so that the core wire connecting portion 2 is usually connected to the upper portion of the bottom plate 8. It comprises a connection terminal box 6 which is a protective case which is detachably attached between both ends 12 and which is a protective case. The core wire connecting portion 2 includes a spacer net and its periphery is made of a moisture-proofing mixture 4 and has a straight sausage shape. Filled and hardened

Next, a procedure for filling the moisture-proof mixture will be described.

First, a self-adhesive foamed polypropylene sheet (hereinafter, referred to as an adhesive sheet) 5 protruding inward from both ends in the longitudinal direction of a connection terminal box 6, including a protruding portion 10 of the cable before the core is separated. The length between the directions is defined as the width, and the length obtained by adding the extra length for adhering the opposing sides of the adhesive sheet to the circumferential length of the longitudinal cross section of the shape in which the moisture-proof admixture is mounted is added. Cut out as vertical. Next, FIG.
As shown in the pressure-sensitive adhesive sheet 5 cut adhesive face 5 ₁ to the inside, the combined width in the longitudinal direction of the cable, about the core wire connection portion 2 which spacer net 3 nonconductive is wound, The opposite side of the pressure-sensitive adhesive sheet 5 at the center is 10c
sticking to leave the injection port 5 ₂ minutes of about m. Then, both sides of the adhesive tape 5 in the longitudinal direction of the cable 1 are respectively adhered, and the projecting portion 1 in the connection terminal box 6 of the cable 1 is adhered.
0 crowded squeeze the side portion is fixed with a hand 7 or debris cord tightening to be a bag-form body ₃ of the pressure-sensitive adhesive sheet 5. Then fixed temporarily to a portion of the upper connecting rod 9 connected to the appropriate part of the inlet has been left without being sticky 5 ₂ open adhesive sheet terminal凾6 as shown in FIG. 3, a two-component mixed by pouring until the moisture for admixture 4 became flowable inlet 5 ₂ Eippai waits for natural curing of moisture-proof blend 4 maintains its state. Become moisture-proof blend 4 does not flow in about 30 minutes by natural curing, the hardened enough withstand vibration, to release the fixing of the inlet 5 ₂ temporary, and completed by attaching the cover to the connecting terminal凾6 .

Further, the pressure-sensitive adhesive sheet 5 used in this embodiment
Is obtained by cutting a foamed polypropylene impregnated with an adhesive to a thickness of about 1 mm on a 360 mm long by 500 mm wide polypropylene sheet generally used as a packaging material. In this embodiment, the method of filling the cable connection portion with the moisture-proofing mixture has been described. However, this method can be generally applied not only to the cable connection portion but also to the exposed portion of the cable core.

[0015]

As described above, according to the present invention, when filling the moisture-proof mixture, the adhesive sheet is formed in a container for accommodating the moisture-proof mixture according to the shape of the cable connection portion. It can be applied to cables and connections with branch cables, and the adhesive sheet adheres between the adhesive surfaces but does not adhere to other parts, so that the workability during molding is easy, and the adhesive part Because of its good watertightness, there is no danger of the moisture-proof admixture flowing out at the time of filling, and the cost is low and the construction cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a view showing a situation of a cable connection portion before a container is attached.

FIG. 2 is a view showing a situation of a cable connection portion before attaching an adhesive sheet.

FIG. 3 is a view showing a situation of a cable connection portion during filling of an admixture.

FIG. 4 is a partial longitudinal sectional view of a conventional cable connecting portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cable 2 Core wire connection part 3 Spacer net 4 Moisture-proof admixture 5 Adhesive sheet 5 ₁ Adhesive surface 5 ₂ Injection port 5 ₃ Bag-shaped molded object 6 Connection terminal box 7 Tightening band 8 Bottom plate 9 Connecting machine 10 Projecting part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 43/00 H01R 4/70

Claims (1)

(57) [Claims] 1. A method for filling a moisture-proof mixture to be applied to an exposed portion of a core of a communication aerial cable in which a sheath is peeled off, wherein a bundle of cable cores in which the sheath is peeled and exposed is involved. Surrounding the outside of the sa net with a space with a self-adhesive soft plastic sheet, facing two opposing sides of the soft plastic sheet upward,
With the central portion left open, the entire periphery of the soft plastic sheet is adhered to the bag with a predetermined width to form a bag, and both sides perpendicular to the axis of the cable are squeezed onto the cable, and the portion is connected to the cable. A method for filling a moisture-proof mixture, wherein the beat is beaten and the moisture-proof mixture is injected from an opening of the soft plastic sheet.