JPH0521939Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a sleeve for protecting cables.

[Prior Art] Since the plastic sheath of a cable is easily damaged, it may be necessary to wrap the outer periphery of the cable to protect it from damage. For example, if an overhead cable suspended from a telephone pole or the like swings and hits the pole repeatedly, the plastic jacket will be damaged, so it is necessary to wrap the outer circumference of the cable to protect it. For this reason, conventionally, as shown in FIG. was tied with string B and attached so as to surround cable C.

[Problems to be solved by the invention] After a long period of time, the plastic cylindrical body A mentioned above will rub against the telephone pole and break, and if left as it is, it will damage the cable jacket, so if it is damaged, it must be replaced immediately. However, there was a problem in that it was not easy to remove the plastic cylinder A attached to the cable and install a new one at a high place on the overhead cable because it was troublesome and took a long time.

In addition, since the cylindrical body A attached to the cable is hard and cannot be bent, there is a problem in that it cannot adapt to the curvature of the suspended cable.

As a flexible tube, two thin metal strips with corrugated crests and troughs are joined together, then spirally wound and the ends of the crests and troughs of the adjacent windings are tied together. The flexible tube of Utility Model Application Publication No. 14378/1983 which is overlapped in layers is known, but such a normal corrugated flexible tube is
Since the width and depth of the peaks and valleys of adjacent windings are the same, if the peaks and valleys of adjacent windings are not aligned accurately, they will not overlap each other and will easily come apart. There is a problem in that care must be taken when winding the wire.

The present invention allows for easy overlapping winding and quick and easy installation and removal.
Another object of the present invention is to provide a spiral sleeve for protecting a cable that is flexible and can be bent to adapt to the curvature of the cable.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the cable protection spiral sleeve of the present invention has a spiral strip 1 made of plastic with a half overlapped portion 1p left on the rear edge 4 side. A large number of circularly curved waveform pleats 2a are provided in the longitudinal direction, and bent and protruding waveform pleats 2b are provided at the overlapping portion 1p on the rear edge 4 side of the spiral strip 1, so that the spiral strip 1 is spirally shaped. The semicircular curved waveform on the front edge 3 side of the strip portion 1b of the following winding is placed on the bent protruding waveform fold 2b on the rear edge 4 side of the strip portion 1a of the preceding winding. The folds 2a are overlapped and both waveform folds are engaged, and the seams of the windings are closed to form a sleeve having a tubular shape.

[Function] Bent protruding waveform folds 2b and semicircular curved waveform folds 2 on adjacent side edges of the spiral winding.
By overlapping and engaging each other, the seams of the windings are closed, and the elasticity of the plastic spiral strip 1 maintains the tubular shape of the sleeve.

The overlapping of the wavy folds on the side edges of adjacent spiral windings means that the shape of the wavy folds is not just a chevron-to-trough shape, but is similar to one front side edge 3 of the spiral strip 1.
By forming the waveform pleats 2a in a semicircular curved shape on the side and forming the waveform pleats 2b in a curved protruding shape on the other rear side edge 4 side, both the waveform pleats can be easily fitted, and winding can be performed as in the conventional method. can be done easily and quickly without having to be careful or precise.

Further, since the curved and protruding waveform folds 2b are engaged with the inside of the semicircularly curved waveform folds 2a, they do not come off easily as in the conventional case.

To attach this spiral sleeve to a cable, simply wrap the spiral strip around the cable, overlapping the adjacent edges of the strip, and then unwrap the spiral strip to remove it from the cable. I can do it.

When the spiral sleeve is attached to the cable in this manner, it adapts to the curvature of the cable and is attached to the flexible suspension cable, thereby protecting the cable jacket from damage.

[Examples] Examples of the present invention will be described below with reference to the drawings. Fig. 1 shows a part of the spiral sleeve for cable protection of the present invention in cross section, Fig. 2 shows the end face of the sleeve tube, and Fig. 3 shows the end of the spiral strip constituting the spiral sleeve. It is something.

First, in Fig. 3, 1 is a spiral strip molded to form an elastic spiral using a suitable soft plastic such as polyvinyl chloride resin (PVC) or ethylene vinyl acetate copolymer resin (EVA). .

This spiral strip 1 is provided with a large number of corrugated pleats in its longitudinal direction. As shown in the third figure, this wavy pleat shape is formed by forming semicircular curved waves in a region 1' on the front edge 3 side, leaving the overlapping part 1p on the rear edge 4 side of the spiral strip 1. Fold 2a
A bent protruding waveform fold 2b having a shape of bending and protruding outward is provided in the overlapping part 1p on the rear edge 4 side.
will be established.

The elastic spiral strip 1 formed as described above is spirally wound to form a pipe sleeve as shown in the first figure. To do this, the strip 1 is first spirally wound, and as shown in the first diagram, the following winding is placed on the bent protruding waveform folds 2b on the rear edge 4 side of the strip 1a of the preceding winding. If the semicircular curved waveform pleats 2a of the front edge 3 of the strip 1b are sequentially wound spirally while overlapping, the bent protruding waveform pleats 2b fit inside the semicircular curved waveform pleats 2a and engage with each other. However, the seams of the windings of the spiral strip 1 are closed, and the wound spiral strip 1 is held in a tubular shape by the elasticity of the plastic, thereby forming the spiral sleeve for cable protection of the present invention.

The dimensions of the spiral sleeve are, for example, the width of the spiral strip 1 is about 94 mm, the width of the strip portion where the semicircular curved corrugated pleats 2a are formed is about 74 mm,
The width of the strip portion where the bent protruding waveform pleats 2b are formed is approximately 20 mm, and the height of the waveform pleats is as follows. The height D2 of the side half wave is approximately 2 mm,
The bent protruding waveform folds 2b have a height D3 of the upper part from the center line of the waveform folds of about 1 mm, and a height D4 of the lower part of the folds of about 3 mm, and the diameter of the sleeve wound into a tubular shape is the same as that of the cable to which this is attached. It shall have an appropriate diameter surrounding the outer periphery, and be colored in an appropriate color such as black or yellow.

The cable protection spiral sleeve of the present invention constructed as described above is attached to and protects a cable whose plastic sheath is likely to be damaged. For example, as shown in FIG.
Wrap and attach as described above. By attaching the spiral sleeve to the cable in this manner, damage to the cable sheathing will be prevented even if the cable swings. When the spiral sleeve attached to this cable is damaged, the spiral strip 1 is unwound and removed from the cable, and a new spiral sleeve is attached.

[Effects of the invention] As mentioned above, the spiral sleeve for protecting cables of the present invention is not a mere chevron and valley shape like the conventional one, but a semicircular shape with an overlapping part on the rear edge side of the plastic spiral strip. In addition to providing curved waveform pleats, bent protruding waveform pleats are provided at the overlapping portion on the rear edge side, and this spiral strip is spirally wound over the bent protruding waveform pleats on the side edge of the adjacent strip. Since the semi-circular curved corrugated corrugations are overlapped and engaged with each other, the fitting of both corrugated corrugations can be done easily and quickly without requiring care and precision as in the conventional method.

In addition, since the curved and protruding waveforms engage with the inside of the semicircularly curved waveforms, it does not come off like in the past, making it safe. It can be attached to fit the cable.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of one embodiment of the present invention;
The figure is an end view thereof, FIG. 3 is a view showing the end of the spiral strip, FIG. 4 is a view of the state in use, and FIG. 5 is a view of a conventional example. 1...Spiral strip, 1p...Overlapping portion, 2a...Semicircular curved waveform pleats, 2b...
Bent protruding waveform folds, 3...front edge, 4...posterior edge.

Claims (1)

[Scope of utility model registration request] Plastic spiral strip 1 with rear edge 4
A large number of semicircularly curved waveform pleats 2a are provided in the longitudinal direction, leaving the overlapped portion 1p on the side, and a bent protruding waveform pleat 2b is provided in the overlapped portion 1p on the rear side edge 4 side of the spiral strip 1. established,
The spiral strip 1 is spirally wound, and the strip portion 1 of the subsequent winding is placed on the bent protruding waveform folds 2b on the rear edge 4 side of the strip portion 1a of the preceding winding.
A spiral sleeve for cable protection in which the semicircular curved waveform folds 2a on the front edge 3 side of b are overlapped and both waveform folds are engaged.