JPH028508Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is a metal wire braided armored cable, for example,
This relates to branch connections for marine cables used for wiring power, controls, lights, etc. inside a ship.

As distribution cables installed indoors in high-rise buildings, condominiums, etc., branch cables are known, in which branch cables are branched and connected to the main cable in advance in a factory using a so-called molding method, and are transported to the construction site by winding a drum. This has the advantage of shortening the construction period, since the line can be extended without any on-site branch connection work.

By the way, when such a cable with a branch is used for a ship, it is essential that the ship cable be equipped with a metal wire braided armor because it will be dragged around inside the ship during installation, and the above-mentioned branch mold connection part It is necessary to provide some type of reinforcement on top as well.

However, since such a connection part has a spindle-shaped protrusion for reinforcing insulation and a stepped part formed by the branch cable connection end, it is extremely difficult to apply armor tightly over the connection part. .

The branch connection part of the metal wire braided armored cable according to the present invention was devised in view of the above points, and connects the metal wire braided armored branch cable to the metal wire braided armored trunk cable at the end of the branch cable. The metal wire braided sheathing applied to the main cable is connected to the main cable by arranging the parts substantially parallel to the main cable, and extending over the metal wire braided sheathing of each cable end at the connecting part and both ends thereof. A metal wire braided cylindrical body made of a large metal wire diameter, a large number of strokes, or a large number of wires is fitted by stretching in the longitudinal direction, and both ends of the metal wire braided cylindrical body are This structure is characterized in that each of the cable ends is tightly bound and fixed to a folded part via a bind wire formed at the end of the metal wire braided armor.

The present invention will be explained below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a metal wire braided armored trunk cable (Ajiro armored cable), with a conductor 10 exposed in the middle. 11 shows the metal wire braided armor of the main cable;
1 is a galvanized steel wire with a wire diameter of 0.12 to 0.18 mmφ,
Copper alloy wire, corrosion-resistant aluminum alloy wire, etc. can be used, and the number of braids and the number of braids to be held differ depending on the cable size, but the number of threads is usually 16 to 36 and the number of braids to be held is 8 to 10. Reference numeral 2 denotes a metal wire braided armored branch cable (Ajirogai armored cable), the end of which is arranged almost parallel to the main cable, and the outlet conductor 20 is connected to the main cable conductor by a conductor branch connection fitting 3. ing. A C-type compression sleeve is normally used for this connecting fitting 3. Reference numeral 21 indicates a metal wire braided armor of the branch cable 2, which is composed of metal wires similar to the metal wire braided armor 11 of the main cable 1. Reference numeral 4 denotes an insulating reinforcing layer provided on the conductor connection portion, and is formed by, for example, an insulating tape winding method using self-adhesive butyl rubber tape or the like, or a cast molding method using vinyl chloride resin, epoxy resin, or the like.

Reference numeral 5 designates a metal wire braided cylindrical body which is placed over the metal wire braided sheathing of the branch connection portion of the cable and each of the cable terminals 1', 1', and 2' at both ends thereof. For this braided cylindrical body 5, a braided tube made of a metal wire having a larger diameter, a larger number of strokes, or a larger number of wires than the metal wire braided armor 11 applied to the main cable 1 is used. In this case, even if the braided tube 5 is stretched as described later, no gap will be generated on its surface.

The metal wire braided tube 5 is stretched in the longitudinal direction (cable axial direction) to be brought into close contact with the cable connection part, and both ends thereof are tightly fixed by binding wires 6 onto the metal wire braided sheathing at each cable end. .

Reference numeral 7 designates a protective layer of the binding wire binding portion, 71 represents a self-fusing tape wrapping layer, and 72 represents a protective tape wrapping layer. The binding wire binding portion can also be protected by covering it with a heat-shrinkable tube or wrapping it with a metal tape (the tape is fixed by soldering).

In the above, the number of branch cables 2 to be connected may be plural. In this case, it is desirable to divide the branch cables into left and right halves with the branch connection part (conductor branch connection fitting) as the base point. Further, as shown in FIG. 2, the ends of the metal wire braided sheaths 11 and 21 of each cable are folded back after being held down by a binding wire 8, and the braided tube 5 is wrapped around the folded part. The ends of are secured with bondage. Furthermore, it is desirable that the outer surface of the metal wire braided tube 5 at the connection portion be coated with an anticorrosive paint such as acrylic white paint, if necessary.

Although the above embodiments have been applied to single-core metal wire braided insulated trunk cables, the present invention is applicable not only to multi-core metal wire braided insulated trunk cables with two or more trunk wires, but also to various types of metal wire braided insulated trunk cables. Needless to say, this method is applicable to marine cables.

As described above, the branch connection part of the metal wire braided armored cable according to the present invention is applied to the main cable over the metal wire braided armor at the branch connection part and each cable end at both ends thereof. A metal wire braided cylindrical body made of a metal wire having a larger diameter, a larger number of strokes, or a larger number of wires than the metal wire braided sheath,
Since the metal wire braided cylindrical bodies are fitted by being stretched in the longitudinal direction, the metal wire braided cylindrical bodies can be covered with sufficient tightness without creating any gaps on their outer peripheries, and there is no risk of impairing their function as armor.

In addition, since both ends of the metal wire braided cylindrical body were configured to be tightly tied and fixed to the folded part via the bind wire formed at the end of the metal wire braided fitting at each cable end, this folded part (especially the bind The metal wire braided cylindrical body can be firmly locked at the wire portion), and even if the metal wire braided cylindrical body attempts to contract due to stretching in the longitudinal direction, it will not contract.

Furthermore, the connection part of the present invention can be formed by factory processing, and the practical effect of omitting branch wiring work on site is great, especially for marine trunk lines where on-site connection using branch boxes is the mainstream. Useful as a cable branch connection.

[Brief explanation of drawings]

FIG. 1 is an explanatory view showing a branch connection portion of a metal wire braided armored cable according to the present invention, and FIG. 2 is an explanatory view showing an example of end treatment of each cable braided sheath at the connection portion of the present invention. In the figure, 1 is a metal wire braided trunk cable, 2 is a metal wire braided branch cable, 4 is an insulation reinforcing layer, and 5 is a metal wire braided cylindrical body.

Claims (1)

[Scope of utility model registration request] A metal wire braided insulated branch cable is connected to a metal wire braided insulated trunk cable by arranging the branch cable almost parallel to the main cable, and the metal wire braided insulated branch cable is connected to the metal wire braided insulated main line cable by arranging the branch cable almost parallel to the main cable, and the metal wire braided insulated cable is connected to the metal wire braided insulated main line cable at the connection point and at each cable end at both ends thereof. Stretching in the longitudinal direction a metal wire braided cylindrical body made of metal wires having a larger diameter, a larger number of strokes, or a larger number of wires than the metal wire braided sheathing applied to the main cable. , and both ends of the metal wire braided cylindrical body are fastened and fixed to folded portions via binding wires formed at the metal wire braided ends of each of the cable ends. Branch connection of metal wire braided armored cable.