JPS633060Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to electric wires and cables, particularly electric wires and cables with tape-wrapped shielding layers.

Conventional electric wires and cables of this kind are constructed by laminating a metal-plastic laminate tape in the form of a thin metal layer laminated on the entire surface of a plastic film, or by wrapping it around a core of an electric wire or cable. Therefore, in the overlapping portion of the wound tape, the metal thin layer portion is overlapped twice, resulting in the formation of an unnecessary shielding layer. In addition, since the two-layered laminate tapes are overlapped, the size and shape of the sheath that covers the outer periphery of the core becomes unduly large. It was uneconomical due to its large size.

Also, for example, Jitko No. 11-4848 or Jitko No. 43-
Some electric wires and cables, such as No. 7973, are made using shielding tape that has a part without a thin metal layer on one end of a tape-like film, but all of these Since the above-mentioned shielding tape is wound around the core of the electric wire/cable etc. so that the layers partially overlap each other, it has substantially the same problem as the above-mentioned electric wire/cable. There is.

Therefore, the purpose of the present invention is to eliminate the drawbacks of the prior art as described above, and to provide an electric wire/cable that can form an efficient shielding layer around the core and that does not cause the size and shape of the sheath to be excessive. It is about providing.

The gist of the present invention is that a thin metal layer is laminated on one side of a plastic film part, and an ear portion on which the thin metal layer is not laminated is formed on one end of the plastic film in the transverse direction. The shielding tape provided so as to define the above-mentioned thin metal layer portions is wound over the core so as not to overlap each other, and as follows:
Embodiments of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the shielding tape used in the embodiment of the present invention has a thin metal layer 2 laminated on one side of a tape-shaped plastic film part 1, and a short side of the plastic film part 1. It has a metal-plastic laminate tape feature provided at one directional end to define a non-laminated ear 3 of the metal lamina 2.

The electric wire/cable according to the present invention uses a shielding tape configured as described above, as shown in FIG.
First, the plastic film part 1a is wrapped around the core 4 so that the plastic film part 1a is in contact with the core 4, and then the metal thin layer part 2b is placed on the ear part 3a of the first wrapping part. The plastic film part 1b is wrapped so as to be in contact with the plastic film part 1b, and then the part of the plastic film part 1 having the thin metal layer part 2 is wrapped over the ear part 3 of the shielding tape at the part just before it. It is constructed by winding it the necessary number of times so that it is positioned at

In this embodiment, since the film portions of each ear portion 3 are brought into contact with the core 4 at the second and subsequent winding portions, the metal thin layer portions 2 are substantially wrapped without overlapping each other. The shielding layer is formed by abutting and integrating the shielding layer on the same circumferential surface. In addition, since the metal thin layer portion 2 integrated on substantially the same peripheral surface forms the outer peripheral surface as a shielding layer, the joining with the sheath 5 provided on the outer periphery can be performed intermittently than in the conventional case. This can be carried out substantially continuously on one surface rather than in sections, and distortion and deterioration of mechanical strength at the position where the shielding tape is wound on the sheath 5 can be prevented. Furthermore, while conventional electric wires and cables require a distance between the core 4 and sheath 5 that corresponds to twice the thickness of the shielding tape, the electric wires and cables of the present invention require a distance that is equivalent to twice the thickness of the shielding tape. Compared to the case, the interval may be reduced by one metal thin layer 2,
This means that if the thickness of the sheath 5 is the same,
This means that the sheath molding material can be reduced by an amount corresponding to the reduction.

FIG. 3 is a diagram showing a case in which the shielding tape explained in FIG. 2 is wound around the core 4 with the inner circumferential side and outer circumferential side reversed, and the effects etc. of this positional relationship are as follows. Since this is substantially the same as the case described above, the explanation thereof will be omitted.

As described above, according to the present invention, the metal thin layer part of the next winding part is wound on the ear part of each winding part, so that the core can be covered with one layer of the metal thin layer part, which is economical. In addition, when the tape is formed using tapes of the same width as conventional tapes, there is no thin metal layer in the overlapped portions of the tapes, making it easier to wind the tapes. can be carried out quickly, and can also ensure improved workability.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a shielding tape used in an embodiment of the present invention, Fig. 2 is an explanatory diagram of an embodiment of an electric wire/cable with a tape-wrapped shielding layer of the present invention,
FIG. 3 is an explanatory diagram of another embodiment of the same electric wire/cable. 1, 1a, 1b, 1c...plastic film part, 2, 2a, 2b, 2c...metal thin layer part,
3, 3a, 3b, 3c...Ear portion, 4...Core, 5
……sheath.

Claims (1)

[Scope of utility model registration request] A shielding comprising a thin metal layer laminated on one side of a tape-shaped plastic film part, and provided so as to define an ear portion not having the thin metal layer on one end in the transverse direction of the plastic film part. A tape-wrapped electric wire/cable with a shielding layer, characterized in that the tape is wound over a core so that the metal thin layer parts do not overlap each other.