JPS60176406A - Method of forming communication cable connector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Technical field of invention) The present invention relates to a method of forming a communication cable connection.

(Technical Backwaters of the Invention and Problems thereof) The connection portions of communication cables having polyethylene jackets are structurally classified into straight connection types and branch connection types including all multi-branch connections. On the other hand, in terms of functionality, it is assumed that the system is intended for semi-permanent use and cannot be dismantled, and that it is required to be able to fully open the connection point, switch lines, and pull out branch cables at any time. Furthermore, any connection part requires a connection structure that can handle disassembly and reconnection work when relocating parts of the couple due to widening of hand holes, manholes, etc. or changing positions. There are quite a few. For this reason, through (i
The structural conditions for cable connections are (l), complete airtightness, (2) disassembly, and (3) ease of work.However, the current various connection methods are as follows. As exemplified in the figure below, there are very few that meet all of these conditions.

Communication couples generally use a so-called gas maintenance method, which uses dry air or N2 gas to ensure that the cable is uninterrupted and that the connections are airtight. Figure 1 shows one of the typical construction methods for couple connections for gas maintenance. In this construction method, 1 is a polyethylene cable jacket, 2 is a glass tape winding part, 3 is an adhesive rubber tape winding part (sealing tape), 4 is an auxiliary lead pipe whose diameter is reduced in several places in the middle, and 5 is a perforated lead pipe. 6 is a soldering lead part, 7 is a core wire connection part, and 8 is a main lead pipe. This connection method has been widely used in the past, but since some gas leakage cannot be avoided over time, maintenance is made possible by continuously blowing gas to maintain the full pressure. This is an unavoidable phenomenon because polyethylene (I/+ coating) cannot be bonded with high airtightness by any method other than heat-melting grooves.

In this construction method, the adhesive rubber tape 3 rolled up on the inside of the auxiliary lead pipe 4, that is, on the cable jacket 1, is compressed (reduced in diameter) at several places in the auxiliary lead pipe, thereby blocking the gas leakage path. Although the method is effective, over time gas leakage paths are formed due to a decrease in the tightening force due to environmental changes, a decrease in the adhesiveness of the rubber tape, etc. Since this structure requires complete disassembly and reconnection as described at the beginning, this is due to the fact that the auxiliary lead pipe section was not made airtight by thermal melting with the polyethylene jacket.

FIG. 2 shows a couple connection made using another conventional construction method.

In this figure, 1 is a polyethylene jacket, 12 is a putty-like resin adhesive, 13 is a cloth tape, and 4 and 9 are core wire connection parts. In this connection, the polyethylene jacket 1 is coated with Al/
PE pasting tape 14 all fused, this and auxiliary lead pipe 40
The putty-like resin adhesive 15 is entirely injected by a press-fitting method so as to adhere to the inner surface. Although this construction method achieves a completely airtight function, the drawback is that the hardening and contact forces of the resin are strong, making it difficult to dismantle even with tools.

(Purpose of the Invention) The present invention has been made in view of the above points, and provides a complete method for forming a communication couple connection portion that is highly airtight and easy to disassemble and thread.

(Summary of the Invention) In other words, the present invention provides a communication couple base Rs having a polyethylene surface entirely covered with a pair of tape seats, which are spaced apart from each other by a predetermined length and wound to a predetermined outer diameter, on the polyethylene outer cover. Wrap an aluminum/polyethylene bonded tape on the side opposite to the cut end of the tape seat located on the side far from the cut end of the cover so that the polyethylene side is tightly attached to the outer cover, and heat it. - Wrap an adhesive elastic tape around the outer periphery of the outer covering between the fishing tape seats so that all of the tape seats have the same outer diameter, and at least part of both tape seats and the aluminum/polyethylene laminated tape. Cover with an auxiliary metal tube that surrounds the auxiliary metal tube, and while making the diameter tl-m at an appropriate point in the middle of this auxiliary metal tube, connect the inner surface of the part that opens at one end and surrounds the outer periphery of the aluminum/polyethylene bonded tape. A putty-like resin adhesive is filled between the aluminum surface of the laminating tape and one end of the auxiliary metal tube is reduced in diameter, and the aluminum surface of the laminating tape exposed from this reduced diameter portion and one end of the auxiliary metal tube is The present invention relates to a method for forming a communication couple connection portion, which includes applying a putty-like resin adhesive so as to completely surround the communication couple.

(Embodiment of the Invention) FIGS. 3 and 4 are longitudinal cross-sectional views of a communication cable connection section in which the method of the present invention is implemented, respectively.

The one in Figure 3 is a straight connection type, and the one in Figure 4 is a branch connection type, and since the cross section is bilaterally symmetrical, both right-hand diacritics are omitted. In Figures 3 and 4, l is polyethylene jacket,
22 is an Al/PE laminated tape, 23 is a putty-like resin adhesive, 24.24' is a cloth tape seat or viscous glass tape seat, 25 is an adhesive rubber tape, and 26 is an auxiliary lead pipe and its squeezed crimping. Point 27 is the soldering lead work part, 8 is the main lead pipe,
9 is a core wire connection portion, and 33 is a molded branch auxiliary tube.

Further, a clip 31 for clamping the entire shielding tape inside the cable and a grounding wire 32 are attached to the cut end 30 of the jacket.

The method for forming a connecting portion according to the present invention is carried out, for example, in the following order.

■ As shown in Figure 3, on top of the polyethylene jacket l,
The tape seats 24, 24' are rolled up at a predetermined distance apart.

This interval is determined by the length of the auxiliary lead pipe 26 that will be placed over the outer periphery later. Further, the outer diameter of the winding is slightly smaller than the inner diameter of this auxiliary lead pipe 26.

■ Next, on the left side of the tape seat 24 located far from the cut end 30 of the jacket, an aluminum/polyethylene laminated tape 22 (so-called laminate tape) is wrapped around the polyethylene tape 22. It is wound so that the surface of the outer sheath closely slides with the IK, and is thermally fused by heating with a burner or the like.

(2) On the other hand, a viscoelastic tape 25 is wound around the outer periphery of the cable jacket between the pair of tape seats 2, 4, and 24'. This outer diameter is also approximately equal to the tape seat 24.24'.

■ Cover the tape seat 24.24' and attach the tape 2
2 is covered with an auxiliary lead pipe 26 that completely surrounds about half of the pipe. A portion of the auxiliary lead pipe 26 corresponding to the outer periphery of the tape seat 24, 24' is machined to have a square diameter, and an intermediate portion 27 thereof is appropriately reduced in diameter. The purpose of this diameter reduction is the same as that explained in FIG. 1. Next, the left fam of the auxiliary lead pipe 26 is processed. This will be explained in FIG. 5.6.7.

■ As mentioned above, the seat 24 is located at the end of the auxiliary lead pipe 26.
After tightening and caulking the center position 27 with a caulking machine, the fifth
Apply the putty-like resin adhesive 23 as shown in the figure, and then
As shown in the figure, caulk the leading end of the auxiliary lead pipe 26. Furthermore, as shown in FIG. 7, a putty-like resin adhesive 23''f is applied so as to surround the outer surface of the end of the auxiliary lead pipe 26 caulked from the end of the aluminum/polyethylene bonding tape 22.

With the above, the connection part is completed, but the material and structure of each part of the coupe/L-connection part adopted in the above-mentioned example are disclosed in Japanese Patent Application Laid-open No. 51-127491 and Japanese Patent Application Laid-Open No. 51-136199.
It is possible to adopt a six-pond configuration as described in the publications of No. 145494 and Japanese Utility Model Application No. 52-145494. Also, as a clip to clamp the shield tension assembly, for example, Jikko 11
All of the materials described in Japanese Patent No. 858-41650 may be used. The auxiliary lead pipe 26 is connected to the main lead pipe 8 by soldering, but both pipes may be made of other metals such as iron or copper instead of lead. Also, the steps in the above method are:
It is possible to switch back and forth as long as it does not interfere with work.

(Effects of the Invention) According to the method of the present invention, the airtightness between the 41i+ secondary metal pipe and the polyethylene sheath of the cable is maintained mostly by the adhesive elastic tape. At one end of the subsidy MW, complete airtightness is achieved using an aluminum/polyethylene bonding tape and a putty-like resin adhesive.

Moreover, since the putty-like resin adhesive is applied only to the vicinity of one end of the auxiliary metal tube, there is no need to wait for the adhesive to harden during construction. Further, there is no need to fill the inside of the auxiliary metal tube with a large amount of putty-like resin adhesive. This has the effect of eliminating the cause of a decrease in strength and airtightness due to incomplete filling of the resin.

Furthermore, when the joint is to be dismantled later, the reinforcing metal pipe can be easily removed, and there is little risk of damage to the cable sheath.

According to the method of the present invention, it is possible to construct a highly reliable connection part that is highly airtight and easy to disassemble.

[Brief explanation of drawings]

1 and 2 are partial longitudinal sectional views of a conventional cable connection part, FIGS. 3 and 4 are partial longitudinal sectional views of a connection part employing the method of the present invention, and FIGS. 5 and 6. FIG. 7 is a process diagram of the thick part of the couple connection portion, which explains the present invention in detail. l ・・・・・・・・・φ Couple jacket 22 φ・・・
0■・ Aluminum/polyethylene laminated tape 23
...... Putty-like resin adhesive 24...
... Tape seat 25 ... Viscous elastic tape 6 ...
...... Auxiliary metal pipe 8 ...... Main metal pipe Fig. 1 Fig. 2rIA No. 3E No. 5 Cause No. 1 Cause No. 7B

Claims (1)

[Claims] In the communication couple connection part having a polyethylene jacket, a pair of tape seats are provided on the polyethylene jacket, spaced apart by a predetermined length and having a predetermined outer diameter, and placed on a side farther from the cut end of the jacket. The aluminum/polyethylene laminated tape is wound on the side opposite to the cut end of the tape base so that the entire polyethylene side is attached to the tape, and the tape is heated and melted. Wrap a viscoelastic tape around the outer periphery so that it has approximately the same outer diameter as the tape seat, and completely cover the sleeve support metal pipe that surrounds both tape seats and at least a portion of the aluminum/polyethylene laminated tape. , while reducing the diameter of the auxiliary metal tube at an appropriate point in the middle, between the inner surface of the part that is one end of the auxiliary metal tube and surrounding the outer periphery of the aluminum/polyethylene lamination tape and the aluminum surface of the lamination tape. is filled with a putty-like resin adhesive, and one end of the auxiliary metal tube is further reduced in diameter, and the putty-like resin adhesive is applied so as to surround this reduced diameter portion and the aluminum surface of the laminating tape exposed from the one end of the auxiliary metal tube. 1. A method for forming a communication cable connection portion, the method comprising applying a coating agent.