JPS58139622A - Connecting terminal can - 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 The present invention relates to the structure of a connection terminal gun for a communication cable.

Conventional communication cable connection terminals use open-type connection terminals in the case of aerial connections.

Although it is possible to easily switch the core wire connection, when this connection method is applied to underground cables, there is a drawback that insulation cannot be maintained due to moisture intrusion. On the other hand, in the case of underground
For waterproofing purposes, resin-filled connection terminals are used to maintain good insulation of the core wire. However, when changing the core wire connection of the cable due to the resin-filled type, it is necessary to dismantle the entire can and remove the hardened resin, which is not easy to do, and there is a high risk to the core wires that do not need to be switched. There were drawbacks.

A conventional example will be specifically explained based on the drawings.

FIG. 1 shows a schematic diagram of a conventional connecting terminal gun and how to use the same. 'The cable (1) is connected to the connection terminal (2).
), extending the distance to the end, but some of the core wires (3) are branched out and connected to the manhole (4) (
Alternatively, the cable is drawn into the subscriber side cable (7) from the hand hole), brought out above the ground, and wired to the subscribers (5) and (5'). However, when the number of subscribers (5) and +5'l increases or moves, the connection terminal (2) must be completely dismantled in order to switch the SM connection room (6) and respond to the change in subscribers. It won't happen. For this reason, the work time and the cost required for switching are large, and there is a possibility that erroneous cutting of core wires that do not require switching may occur during one operation. In the figures, (8), (8), and (- indicate the cable jacket connection part.

In order to eliminate the conventional drawbacks, the present invention provides a main and sub-connection chamber in the can housing, provides a hole to communicate the main and sub-core connection chambers, and provides an airtight frame in the hole to connect the main and sub-core wires. The cable cores drawn into the room are connected, and the branched core wires are connected in the sub-connection chamber through the holes in the airtight frame, the sub-connection chamber is provided with a cable lead-in port, and the main connection chamber is filled with resin. In addition, each of the sub-connection chambers is equipped with a lid to make it an airtight chamber.The purpose of this is to facilitate switching and changing the connection of the core wires, and to prevent errors in connecting the core wires without the need for switching. The purpose is to prevent breakage and ensure the safety of the contained core wires.

FIG. 2 shows a cross-sectional view of the connecting terminal cancer of the present invention.

In the figure, the same reference numerals as in FIG. 1 indicate the same parts.

In the figure, (9) is the connection terminal can housing of the present invention, (lO) is the main wire connection chamber, (10-1) is the main wire connection section, (11) is the control wire connection chamber, (12) is the subscriber side cable connection point (hereinafter referred to as the subscriber connection point) in the control line connection room (11); (12-1) is the backup connection point;
3) is a lid, and (14), (14'), and (14'') are perforated airtight frames.

The structure of the connection terminal according to the present invention will be explained.

The can housing (9) has a rectangular vertical cross section, and has a main wire connection chamber (10) in the lower center separated from the control wire connection chamber (11), and both connection chambers have holes (IOA) on the left and right sides. , ('l0B
) for communication.

Cable (1), (one core wire (3), ((a)) is inserted into the airtight frame (14), (14
') is provided, and is led into the control line connection chamber (11) through the holes in the airtight frames (14), (14') and connected to the subscriber side cable (7) at the connection point (12).

In the present invention, in addition to the core wires (3) and (3) connected to the subscriber side couple (7), when the number of subscribers increases, the preliminary core wires (3A) and (3X) t-side stones are II! Connection room (11
) through the holes in the airtight frames (14) and (14') and connect them at the lead-in preliminary connection point (12-1).

The side stone line connection part (11) is an airtight part with a lid (13), so if there is a change in the number of subscribers, for example an increase of 1, the lid (13) is installed at the preliminary connection point (12-1). 1
3) Be able to respond by opening and performing switching operations. Therefore, there is no need to dismantle the entire can housing (9), and the work is extremely easy. In order to maintain complete airtightness, for example, a polyurethane mixture (10-2) is filled in the main wire connection part (lO), but water is not completely removed from the side stone wire connection part. Even if it cannot be shut off, do not add the mixture and seal the lid (13) with an O-ring <1l-1.
), and use an airtight frame (14), (11)% (14"), such as a rubber perforated dam, at the core wire inlet.

It can maintain sufficient airtightness for practical purposes and has good workability.

FIG. 3 is a diagrammatic perspective view of the structure of the connection terminal cancer of FIG. 2. This is extremely convenient for underground connections where there are many connection changes. The same symbols as in FIG. 2 indicate the same parts and parts.

As explained above, the connection terminal gun of the present invention allows the side stone wire connection portion to be opened while maintaining the airtightness of the main wire connection portion, improving the workability of switching connections and The safety of the wire connection is ensured, and the entire connection terminal has an airtight structure, so the connection terminal itself is completely sealed.
Suitable for installation inside a cell, in a handhole, or directly underground, and can be used as a connection terminal for subscriber underground wiring where switching connections are frequently made. It produces effective effects such as.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional underground connection terminal cancer, Fig. 2 is a sectional view of an embodiment of the connection terminal cancer of the present invention, and Fig. 3 shows the structure of the connection terminal cancer in Fig. 2. A diagrammatic perspective view is shown. 1.1#; Main cable, 2: Conventional underground connection terminal cancer, 3: Cable core, 4: Manhole or handhole %511 subscriber's house, 6: Core wire connection room injected with polyurethane mixture, 7: Subscriber pull-in cable% 81
8' @ 8": Couple jacket connection part, 9: Can housing, 10: Main wire connection chamber, 10-2: Polyurethane mixture, 11: Side wire connection chamber, 12: Subscriber connection point, 12 −
1: Preliminary connection point, 13: Airtight lid, 14.14', 14
”: Airtight frame with holes. Patent applicant: Nippon Telegraph and Telephone Public Corporation representative, patent attorney Isao Abe Figure 1

Claims (1)

[Claims] Connect the core wires of a telecommunication cable or optical communication cable with multiple core wires, and provide branch core wires in some parts.
In a connection terminal gun in which the connection part is filled with resin, main and sub-core wire connection chambers are provided in the can housing, and a hole is provided to communicate the upper and sub-core wire connection chambers, and the hole is airtight. A frame is provided, and the cable cores drawn into the main fiber connection chamber are connected, and the branch core wires are connected in the sub-connection chamber through the holes of the airtight frame, and a cable lead-in port is provided in the sub-connection chamber. The pre-generated connection chamber is filled with resin, and
The connection terminal cancer is provided with the sub-connection chamber-like lid and sealed to form an airtight chamber.