JP2595099Y2 - Structure of gripper for non-circular electric wire - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a gripping portion of a non-circular electric wire having a non-circular cross section, which is expected to have a special effect such as a low wind piezoelectric wire and a low noise electric wire.

[0002]

2. Description of the Related Art In a non-circular electric wire of this kind, for example, as shown in FIG. 9, two valleys 52, 52 appearing in a cross section of the non-circular electric wire 51 are formed as spirals having a predetermined pitch. In such a non-circular electric wire 51, even if the electric wire gripping surface is gripped by the electric wire clamp 53 having a circular cross section, the electric wire has a wide valley 52 on the electric wire surface, so that the electric wire can be accurately grasped and sufficient electric characteristics can be obtained. There was a problem such as not being able to obtain.

Accordingly, a spiral plate 54 (FIG. 10) having substantially the same pitch and width as the valley 52 and substantially the same thickness as the valley 52 is attached to the valley 52 to form an outer periphery formed by the electric wire 51 and the spiral plate 54. A structure in which the above-mentioned problem is solved by making the surface circular in cross section (Japanese Patent Application Laid-Open No. 60-82009) has been proposed.

[0004]

However, the pitch of the spiral valleys 52 of the non-circular electric wire 51 is slightly different depending on the wire manufacturer (10 to 12 times the outer diameter of the wire). I couldn't handle it with a board.

That is, when a spiral plate 54 having a width smaller than the width of the valley portion 52 is used in order to cope with different pitches, a gap formed between the spiral plate 54 and the peak portion 55 enables accurate electric wire gripping and sufficient Electrical characteristics cannot be obtained. Also, when the spiral plate 54 is wound around the valley 52 when one end of the spiral plate 54 is wound at the winding start position corresponding to the valley pitch, the other end 56 of the spiral plate 54 becomes as shown in FIG. May get on the spiral mountain portion 55. When the end of the spiral 54 rides on the crest 55, the overlap with the crest 55 increases toward the end, and the spiral plate 54 adheres strongly to the crest 55 by elasticity. However, there is a disadvantage that it is troublesome and time-consuming.

The present invention has been made in view of the above points, and uses a single spiral plate for a non-circular electric wire having a slight difference in pitch and width of a spiral valley, whereby the tip is non-circular. The gripping portion of the non-circular electric wire is designed to facilitate the returning operation of the tip portion to the valley portion even when riding on the spiral ridge portion of the circular electric wire and to eliminate the inconvenience due to the gap between the spiral plate and the spiral ridge portion. The purpose is to provide a structure.

[0007]

In the gripping portion of the non-circular electric wire according to the present invention, the spiral valleys 4 and 12 of the non-circular electric wires 1 and 11 are provided with spiral plates 6 and 13 to form a non-circular shape. In the gripping portion of the electric wire in which the outer peripheral surface formed by the electric wires 1 and 11 and the spiral plates 6 and 13 has a circular cross section, the width of the spiral plates 6 and 13 is made smaller than the width of the spiral valleys 4 and 12 and the spiral is formed. The tip portions 7 of the plates 6 and 13 are tapered, and the spiral direction of the spiral plates 6 and 13 is opposite to the spiral valleys 4 and 12 at the place where the spiral plates 6 and 13 are attached to the spiral valleys 4 and 12. The armature rod 14 is wound.

According to this means, by using one spiral plate 6, 13 for the non-circular electric wires 1, 11 in which the pitches and widths of the spiral valleys 4, 12 are slightly different, the spiral valleys are formed. Even if a gap is formed between the spiral plates 4 and 12 and the spiral plates 6 and 13, the spiral armor rod 14 wound around the wire gripping portion covers the gap.

Since the tips 7 of the spiral plates 6, 13 are tapered, the spiral ridges 5, 1 of the spiral plates 6, 13 are formed.
6 is reduced, and even when the vehicle rides on the peaks 5 and 16, the tip 7 is tapered, so that the overlap with the peaks 5 and 16 is small. Therefore, the work of returning the spiral plates 6, 13 to the spiral valleys 4, 12 becomes easy.

[0010]

[Embodiment] An embodiment of the present invention will be described with reference to the drawings. In FIGS. 1 and 4, the surface of the non-circular stranded wire 1 has two valleys 4, 4 and two ridges 5, which are spirally formed at a predetermined pitch by a small stranded wire 2 and a large stranded wire 3.
5 are formed.

The length of the spiral plate 6 attached to the valley 4 is about 1.2 times the pitch of the valley 4. The width of the spiral plate 6 is considerably narrower than the width of the valley 4 so that the pitch and the width of the valley 4 are slightly different depending on the electric wire manufacturer, so that the width can be applied to any of them. A gap is formed between the helical plate 6 and the spiral plate 6 attached thereto.

The thickness of the spiral plate 6 is equal to the depth of the valley 4. Thereby, the surface of the spiral plate 6 attached to the valley 4 and the surface of the peak 5 form a part of the same circle. The tip 7 of the spiral plate 6 is a tapered portion, and the tip is colored 8 differently from the non-circular stranded wire 1.

When the spiral plate 6 is attached to the valley 4, there is no problem in a state where the tip 7 of the spiral plate 6 is in contact with the side surface of the peak 5 as shown in FIG. If a part of the tip portion 7 rides on the peak portion 5 as described above, it may cause trouble in clamping the electric wire.

Whether or not the tip 7 of the spiral plate 6 rides on the crest 5 is determined by the non-circular stranded wire 1 and the color 8 of a different color from the tip 7.
, It can be easily identified. Since the distal end portion 7 is a tapered portion which is tapered, it does not normally climb on the mountain portion 5 as shown in FIG. Since it is smaller than the one not provided, the returning operation to the valley portion 4 becomes easy.

A spiral plate 6 is provided on the spiral valley 4 of the non-circular stranded wire 1.
, An armor rod 10 composed of a plurality of armor rod strands 9 (FIG. 3) whose twisting direction is opposite to that of the spiral plate 6 is wound from above. Therefore, the gap formed between the peak 5 and the spiral plate 6 is completely covered by the armor rod 10 (FIGS. 1 and 4).

FIG. 5 shows another embodiment of the non-circular electric wire 11 in which the spiral valleys 12, 12 are provided with the spiral plates 13, 13, and the armor rod 14 is mounted thereon. The state clamped by the clamp 15 is shown.

[0017]

As described above, according to the present invention, the width of the spiral plate is smaller than the width of the spiral valley of the non-circular electric wire, and the resulting gap between the spiral plate and the spiral valley is reduced. Since it is covered with the armor rod, even if the pitch and the width of the spiral valleys are slightly different depending on the electric wire manufacturer, one spiral plate can cope with it and the electric wire can be grasped accurately, and the electric characteristics are not impaired. Also, since the tip of the spiral plate has a tapered tapered portion, when the spiral plate is attached to the spiral valley of the non-circular electric wire, the climbing of the non-circular electric wire to the peak portion is reduced,
Even when the vehicle rides on the peak, the overlap between the spiral plate and the peak is smaller than that without the tapered portion, so that the returning operation to the valley becomes easier.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of an embodiment of a spiral plate.

FIG. 3 is a partially cutaway side view of the embodiment of the armor rod strand.

FIG. 4 is a sectional view taken along line AA in FIG.

FIG. 5 is a cross-sectional view of a conductor clamp holding an electric wire according to another embodiment of the present invention.

FIG. 6 is a side view showing a state in which the tip of the spiral plate rides on the crest of the non-circular electric wire.

FIG. 7 is a side view of a state in which a tip side surface of a spiral plate is in contact with a side surface of a mountain portion of a non-circular electric wire.

FIG. 8 is a side view showing a state in which the tip of the spiral plate whose tip is not tapered rides on the crest of the non-circular electric wire.

FIG. 9 is a cross-sectional view of a conventional non-circular electric wire provided with a spiral plate.

FIG. 10 is a partially cutaway perspective view of a conventional spiral plate.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Non-circular electric wire 4 Spiral trough 5 Spiral peak 6 Spiral plate 7 Tip 10 Spiral armor rod 11 Non-circular electric wire 12 Spiral trough 13 Spiral plate 14 Spiral armor rod 16 Spiral peak

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-82317 (JP, A) JP-A-60-82009 (JP, A) JP-A-61-1219 (JP, A) 63834 (JP, U) Japanese Utility Model Showa 61-149922 (JP, U) Japanese Utility Model Showa 63-179723 (JP, U) Japanese Utility Model Showa 50-156794 (JP, U) (58) Field surveyed (Int. ⁶ , DB name) H02G 7/00-7/22

Claims (1)

(57) [Scope of request for utility model registration] 1. A spiral plate is attached to a spiral valley of a non-circular electric wire.
To make the outer peripheral surface formed by the non-circular electric wire and the spiral plate into a circular cross section.
At the gripping part of the formed wire, the width of the spiral plate
A part where the tip of the spiral plate is tapered and the spiral plate is attached to the spiral valley,
A spiral armor rod whose twisting direction is opposite to that of the spiral valley.
A structure of a grip portion for a non-circular electric wire, which is wound .