JPS583512A - Method of connecting mechanical sheath of calbe cascade type - 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 This article VJ relates to a vertically split mechanical jacket connection method for cables.

Conventionally, the vertically split type sheath connection of communication cables uses auxiliary lead pipes and main lead pipes that are split vertically in the longitudinal direction, and a perforated disc is installed on the existing cable and the newly installed cable, and the cable is connected vertically to the cable. The split auxiliary lead pipe is vertically leaded using a torch rung, and the auxiliary lead pipe is moved vertically from the perforated disc to the sealing tezo wrapped around the outer jacket and caulked. Attach to the cable,
After that, the core wire connection was completed, and then the F main lead pipe was vertically plumbed, both ends were swaged, and the auxiliary lead pipe was joined with the auxiliary lead pipe to maintain P airtightness and mechanical strength. However, this method uses a torch rung to connect the outer sheath to the lead wire, so if it is applied to a small-diameter optical cable, for example, the heat from the lead wire work will deform the optical fiber sheathing material, resulting in permanent loss. The reliability of the vertical split lead work itself has increased as the
It had the disadvantage of being lacking.

In order to solve the problem of the conventional art, the present invention uses a TM component that integrates a plate or rod shape = 1" A and a circular gasket for sealing the longitudinal joint surface of the half-split main sleeve to maintain airtightness. Rubber gaskets with different vertically split directions are used to maintain mechanical strength.
The purpose is to provide a non-heating vertically split type mechanical sheath connection method using all-metal cables and external metal fittings, and the gist is that after the cable core wires are connected, Pass the cable through a rubber gasket with a hole for a longitudinally split end plate of the '2s class, which is provided so that the vertically split surfaces do not overlap with the cable, and attach it to the cable, and also attach it to the inner side of the core wire connection part side by connecting it to the rubber gasket. A metal ring is installed to withstand compression and a plate-shaped or rod-shaped component attached to the longitudinal joint surface of the main sleeve half is installed, while a connected gasket (9 connected type gasket) is installed. By tightening the main sleeve with one torque, an airtight connection is achieved, and mechanical strength is achieved by inserting the half-shaped internal fitting inside the cable jacket and gripping only the cable jacket with the cable fixing base and the external metal fitting. It is characterized by making a connection with.

Hereinafter, the connection method according to the present invention will be explained based on an embodiment in which it is applied to the connection of the gas maintenance optical cable shown in the drawings.

FIG. 1 is a front view of a completed vertically split mechanical jacket connection part used in the connection method according to the present invention, FIG. 2 is a side view of the completed product, and FIG. 3 is a cross section taken along line A-A in FIG. 1. In the figure, 1 is a half-split main sleeve of a vertically split mechanical jacket connection part made of glass or metal, la is a hole for its bolt, and 1b is a main sleeve! Tightening melt, 2 is the gas conservative party,
.

It is a pull.

Figure M4 to Figure 10 show parts diagrams for maintaining airtightness used in the connection method according to the present invention.
The figure shows a rubber gasket with holes for vertically split end plates for two volatiles) (7)
The front view, Figures 5 and 7 are side views of Figures 4 and 6, respectively, Figure 8 is a three-dimensional view of the connected type as a socket, Figure 9 is a front view of the half-split metal ring, and Figure 10 is a front view of the halved metal ring. The figure is a side view thereof. 3.4 is a rubber gasket with a hole for two types of longitudinally split end plates (fc), which is provided so that the longitudinally split surfaces do not overlap with the cable, and 3m and 4a are for this cable 21 -f when inserted into the rubber sockets 3 and 4. Vertical section, 3b, 3g, 4b, 4
e is the vertical @ surface when inserting the branch cable into the rubber gasket 3.4, 31.44 is a hole with a groove for the adhesive mixture 7 and fixes the cable 2, 5 is in contact with the rubber gasket, and both ends It is a nine-connected type gasket made by integrating a circular gasket and two plate-shaped or rod-shaped rubber pieces, 5a is the five part for air pressure in the longitudinal direction of the main sleeve 1, 5b is the circular gasket part, and 5 is the circular gasket part. 6 is a half-split metal ring for controlling the circumferential compression of the circular gasket; 7 is a round adhesive compound to accommodate cable scratches and outside diameter variations; be.

First, Figure 11 is an overall view of the mechanical strength retaining part used in the connection method according to the present invention, and Figures 12 to 21t! Qt
12 shows the front view of the cable fixing base, Fig. 13 shows the plan view, Fig. 14 shows the front view of the external grip for the branch gooseol, and Fig. 15 shows the plan view. Figure 16 is a front view of the internal grip for this cable, Figure 17 is its top view, Figure 18 is a front view of the internal grip for branch cable, Figure 19 is its plan view, and Figure 20 is the internal grip for this cable. A front view of the metal fitting, and FIG. 21 is a plan view thereof. 8
The mechanical strength maintaining portions are both made of metal in this embodiment. In addition, 81 is a cable fixing base that can fix up to three cables, 8b is an external gripping metal fitting for the main cable 2, 8C is an outer gripping metal fitting for a branch cable, 8d is an internal gripping metal fitting 8j, and 8 and an external gripping metal fitting 8b. .

8c is tightened to the cable fixing base 8& The cable jacket is tightened by the bolt, 8. is the female thread part for tightening the fixing base, 8
f, 8g, 8h, 81 are holes for tightening bolts, 8j is an internal gripping metal fitting for the main cable, 8 is an internal gripping metal fitting for a branch cable, 9 is an extra length processing section holding rod, 9a is a female screw, 10
is the extra length processing section.

In the connection method according to the present invention, first, after the connection of the core wires is completed,
It begins by wrapping the adhesive mixture 7 in place on the gas maintenance optical cable 2 . Next, the vertically divided surfaces 3b, 3c, 4b of the Mugasu cut 3, 4 with holes for the vertically divided end plates are
4c to the left and right, and fix the cable 2 to the cable fixing holes 3d and 4d of rubber gasket 3.4 with holes for the end plate. Insert. Then, a half-carved metal-like ring 6 is fixed to the inner surface of the circular gasket 5b to complete the assembly of the airtight rubber parts. For keeping this airtight! After completing the assembly of the main sleeve parts, cover the vertically split end plate holed rubber gaskets 3 and 4 and the connecting gasket 5 from above and below, pressing the main sleeve l into place. For tightening, pass the lb. through the bolt hole 1a and tighten it to complete the work. In addition, shim gasket 3, 40 with hole for end plate that is not used, hole 3d for fixing cable.
.

It is preferable to leave the blind cap on 44.

The above procedure is for maintaining airtightness, but as shown in Fig.
The outer cover divided into two parts is sandwiched between the cable fixing base 8& and the external metal fittings 8b and 8c, and both sides of the connection part are connected to the extra length processing part holding rod 9.

It goes without saying that the connection method according to the present invention can also be applied to sheath connections that do not require vertical splitting, but in this case the vertical splitting surface is 3 m.

3b, 3c, 4a, 4b, 4o, and 5e are not acceptable, and can constitute a connection section that is much more reliable than a vertically divided connection. Furthermore, although the above embodiment has been described using a gas-maintained optical cable as an example, the present invention is applicable not only to optical cables that do not require gas maintenance, JF optical cables, but also to jacket connections of general metal core cables.

As described above based on the embodiments shown in the drawings, the connection method according to the present invention differs from the conventional method in that it does not require cutting heat, and therefore, when applied to optical fibers, It does not cause permanent loss to the optical fiber, and to maintain airtightness, a connected gasket is used, in which circular gaskets at both ends are integrated with a plate or rod-shaped rubber, and a halved internal gasket is used to maintain mechanical strength. By using the gripping metal fitting, the cable fixing base, and the external gripping metal fitting, a non-heating mechanical connection with excellent airtightness can be constructed, which is extremely effective for connecting cable jackets.

[Brief explanation of drawings]

Fig. 1 is a front view of a completed body of the longitudinally split outer sheath connection part used in the connection method according to the present invention, Fig. 2 is a side view of the completed body, and Fig. 3 is a sectional view taken along line A-A of Fig. M1. Figures 4 and 6 are front views of rubber gaskets with holes for vertically split end plates, Figures M5 and 7 are 11411 side views of them, Figure 8 is a three-dimensional view of the connected gasket, and Figure 9 is a half-section. Front view of metal ring, No. 10
The figure is the 1111 view. Moreover, FIG. 11 is an overall view of the mechanical strength maintaining part used in the connection method according to the present invention,
Figure 412 is a front view of the cable fixing base, Figure 13 is a plan view thereof, Figure 14 is a front view of the external grip for branch cables, Figure 15 is a plan view thereof, and Figure 16 is the external grip for this cable. Figure 17 is a plan view thereof, Figure 18 is a front view of the internal grip for the branch cable, Figure 19 is its flat 11111 view, and Figure 20 is a front view of both internal grips for this cable. Fig. kII21 is a plan view thereof. In the drawing, 1 is the halved main sleeve, 1a is the Vi melt hole, and lb is the main three! Thin bolt, 2ti fiber optic cable. 3.4 is a rubber gasket with holes for vertically split end plates, 3a, 4
a is for inserting this cable - 1 side, 3b, 3c, 4b, 4@
3d and 4d are vertically split surfaces for inserting branch cables, 3d and 4d are cable fixing holes, 5 is a connecting gasket, 5 & is a plate-shaped rubber part, 5b is a circular gasket, 5c is a vertically split surface for cable insertion, 6 is a split metal 7 is an adhesive mixture, 8 is a mechanical strength retaining part, 8a is a cable fixing base, 8b is an external gripping metal fitting for this cable, 8C is an external gripping metal fitting for a branch cable, 8d is a cable jacket tightening bolt, 8e is the female thread for tightening the cable jacket, 8f, 8g,
8h and 81 are holes for tightening the cable jacket, 8j is an internal gripping metal fitting for the main cable, 8 is an internal gripping metal fitting for the branch cousol, 9 is an extra length processing section holding rod, 9a is a female grommet screw, 10 is an extra length This is the processing section. Patent applicant Nippon Telegraph and Telephone Public Corporation Patent attorney Shibu Mitsuishi (and 1 other person) Figure 2 Figure 3 Figure 11! r13R Figure 14 Figure 15 Figure 16 Figure 17

Claims (1)

[Claims] After the cable core is connected, pass the cable through the type 281 type 281 vertically split end plate with hole @ f A f socket provided so that the vertically split surface does not overlap the cable, and attach the cable to the core wire connection part. A connecting type in which a metal ring is attached to the side in contact with the f-mu gasket and on the inside to withstand compression, and is integrated with a plate-shaped or rod-shaped gamma component attached to the longitudinal joint surface of the half-split main sleeve. While installing the gasket, tighten the half-split main sleeve with one torque to create an airtight connection, and after inserting the split-shaped internal fitting inside the cable jacket, hold only the cable jacket with the cable fixing stand and the external metal fitting. A vertically split mechanical jacket connection method for a cable, characterized in that a connection having mechanical strength is achieved by doing so.