JPH0715297Y2 - Spiral sleeve for aerial cable protection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a sleeve for protecting an overhead cable.

[Prior Art] The plastic jacket of an aerial cable is easily damaged, and the plastic jacket is damaged if the aerial cable hung on a utility pole sways and repeatedly hits the utility pole, so the outer circumference of the cable must be wrapped and protected. In the prior art, as shown in FIG. 6, a messenger wire W supported by a power pole P is used.
From the cable hanger H, the outer circumference of the cable C is covered with a long cylinder A made of hard plastic,
The cylindrical body A was attached by a string B so as to surround the cable C.

In addition, the outer surface of the synthetic resin tubular body is provided with a plurality of ridges for abrasion in the length direction, and the tubular body is spirally cut at a constant pitch and a continuous coil strip-shaped wire protection cover. By forming this coil-shaped cover around the wire around the wire and spirally winding it with the coil-shaped side edges adjacent, it is possible to prevent the branches and leaves of the street tree from directly contacting the overhead wire, and A protective strip, which is spirally wound and has a tubular shape, is formed on the outer surface of the protective cover so as to project in the lengthwise direction of the wire, and the protective cover is worn by the sliding contact of branches and leaves to protect the cover. An electric wire protective cover of Japanese Utility Model Laid-Open No. 56-110726 is known in which wear of the cover is delayed to enable long-term use.

In addition, a spiral tube of large and small cross section Π-shaped is provided in a synthetic resin hollow tube, and a Π-shaped thread groove in which the Π-shaped small spiral thread is fitted is formed inside the Π-shaped large spiral thread. , A spiral ridge is provided on the surface of the hollow tube body, and this hollow tube wall is cut into a spiral strip between two large and small Π-shaped spiral strips to form a spiral strip. By winding it in a spiral shape and fitting the small π-shaped spiral thread into the thread groove inside the large π-shaped spiral thread, it can be wound around the electric wire in the area near the insulator where the bending radius is very small. Such a protective cover of Japanese Utility Model Publication No. 49-9600 is known.

[Problems to be Solved by the Invention] A conventional plastic cylindrical body as shown in FIG. 6 is rubbed and damaged by a utility pole after a long period of time, and if left as it is, the cable jacket is damaged. Although it must be replaced, it is not easy because it takes time and takes a long time to remove the plastic cylinder body mounted on the cable and mount a new one at a high place of the overhead cable.

In addition, in the wire protection cover disclosed in the Utility Model, only the side edges of the coil band cover that is spirally wound around the wire are adjacent to each other, and the adjacent side edges are not joined, so the spiral around the wire is not connected. There is a problem that the winding is easy to unwind and there is a risk of falling off from the electric wire when strong wind blows.

In addition, in order to wind and fix the protective cover of the utility model on the periphery of the electric wire, it is necessary to fit the Π-shaped large spiral ridge onto the Π-shaped small spiral ridge so that they are fitted exactly. It is not easy and quick to attach to a large and small Π-type spiral strip that fits with each other because the cross-sectional shape of the two Π-shaped spiral strips that fit with each other is Π-shaped. There is a problem that strong wind blows into the gap between the strips and the fitting is disengaged, and there is a risk of falling from the wire.

In addition, the electric wire protective cover disclosed in the utility model and the protective cover disclosed in the utility model have large ridges protruding from the strips wound around the wires, so the strips are rolled into a spiral for transport and storage. It is inconvenient to handle, and when the strips are spirally wound around the wire to form a tubular cover, the large ridges protruding on the surface of the tubular cover on the wire will not be dusty. There is a problem that excessive load is applied to the overhead wire due to the accumulation of snow and snow.

An object of the present invention is to solve the above-mentioned problems, to provide a spiral sleeve for protecting an aerial cable that facilitates mounting and dismounting quickly and prevents the wire from coming off, and prevents dust and snow from accumulating. It is what

[Means for Solving the Problems] In order to achieve the above-mentioned object, a spiral sleeve for protecting an aerial cable of the present invention is provided on a front side edge portion 1F of a plastic spiral strip 1 and has a downwardly projecting triangular cross section. An outer projecting overlap edge 2 is formed by forming a plurality of engaging projections 4 extending in the lengthwise direction of the strip 1, and the rear side edge 1R of the spiral strip 1 has a triangular cross-section upward on the upper surface. An inner protruding ridge overlapping edge portion 3 is formed in which a plurality of engaging protruding ridges 5 protruding in the longitudinal direction of the strip 1 are formed, and the spiral strip 1 is spirally wound to form a preceding winding strip portion. Lower surface of outer protruding edge 2 of outer protruding edge of front edge 1F of trailing winding strip portion 1b on upper engaging protruding edge 5 of inner protruding edge overlapping portion 3 of rear edge 1R of rear side 1a The downward engaging protrusions 4 are overlapped and engaged.

[Operation] The spiral strip 1 is spirally wound around the outer circumference of the overhead cable (the front side of the arrow and the rear side of the arrow in FIGS. 3 and 4 are on the cable from the front side of the arrow toward the rear side of the arrow. Indicates that the spiral band 1 is wound on the cable, and the strip portion on the front arrow side of the spiral strip 1 wound on the cable is the strip side portion of the preceding winding 1a that is wound first, and the rear arrow The strip portion on the side of is the strip side portion of the succeeding winding 1b that is subsequently wound. 1F in FIG. 3 indicates the front edge portion of the spiral strip 1 and 1R indicates the rear edge portion. The outer ridge overlapping edge 2 of the front edge 1F of the spiral strip 1 and the inner ridge overlapping portion 3 of the rear edge 1R are the strip 1
When they are spirally wound, they are overlapped with each other, and the downward engaging ridges 4 and the upward engaging ridges 5 of both ridge overlapping edges 2 and 3 are fitted into the valley between the mating ridges. Are engaged with each other, the winding seam of the spiral strip 1 is closed, and the shape of the tubular sleeve is held by the spiral molding elasticity of the plastic spiral strip.

To attach this spiral sleeve to an aerial cable, wind the spiral strip 1 around the aerial cable,
As described above, both the inner and outer ridge overlapping edges 3, 2 of the strip 1.
By overlapping and winding, the engaging ridges 4 and 5 of both ridge overlapping edges 2 and 3 are engaged, and the ridges are attached to the aerial cable without coming off even if a strong wind blows.

A plurality of engaging protrusions 4 and 5 projecting in a triangular shape in cross section are provided on the outer protruding edge overlapping portion 2 of the front side edge portion 1F of the spiral band 1 and the inner protruding edge overlapping portion 3 of the rear side edge portion 1R. Since the outer ridge overlapping edge 2 of the front edge 1F and the inner ridge overlapping edge 3 of the rear edge 1R are overlapped, even if all of the multiple ridges remain Even if they do not engage with each other accurately, the winding of the spiral strip 1 is fixed only by the engagement of some of the multiple protrusions, and winding around the overhead cable at a high place. Work becomes easy.

By mounting the spiral sleeve on the overhead cable, the cable jacket is protected against damage.

In order to remove the spiral sleeve attached to the overhead cable, it can be removed from the cable by unwinding the spiral strip 1.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a part of a spiral sleeve for protecting a cable of the present invention in section, FIG. 2 shows an end surface of the sleeve tube, and FIG. 3 shows an end portion of a spiral strip which constitutes the spiral sleeve. FIG. 4 shows the overlapping edges of spiral strips wound in a spiral.

In FIG. 3, reference numeral 1 is a spiral strip formed by forming an elastic spiral with an appropriate soft plastic such as polyvinyl chloride resin (PVC) or ethylene vinyl acetate copolymer resin (EVA).

Reference numeral 2 denotes an outer ridge overlapping edge formed on the front edge 1F of the soft plastic spiral strip 1 and 3 indicates an inner ridge overlapping edge formed on the rear edge 1R of the spiral strip 1. , On the lower surface of the outer protruding overlapping edge portion 2 of the front side edge portion 1F,
A plurality of engaging projections 4 projecting downward in a triangular cross section and extending in the lengthwise direction of the strip 1 are provided, and an upward projecting triangular cross section is provided on the upper surface of the inner projection overlapping edge 3 of the rear edge 1R. Plural engagement protrusions 5 are provided which project in a shape and extend in the longitudinal direction of the strip 1.

The spiral strip 1 constructed as described above is spirally wound to form a tubular sleeve as shown in the first drawing.
First, the strip 1 is spirally wound, and then, as shown in FIG. 4, on the inner ridge overlapping edge 3 of the rear side edge of the strip 1a of the preceding winding, the strip 1 of the subsequent winding is wound. By spirally winding the outer ridge overlapping edges 2 on the front side edge of the strip portion 1b while superimposing them, the upward engaging ridges 5 and the outer ridge overlapping edges of the inner ridge overlapping edges 3 are formed. 2, the downward engaging ridges 4 are fitted into and engage each other in the valleys between the mating ridges,
The seam of the windings of the inner protruding ridges 2 and 3 is closed, and the wound plastic spiral strip 1 is held in a tubular shape by the spiral molding elasticity to form the spiral sleeve for protecting the cable of the present invention. It

The spiral sleeve has a thickness of, for example, about 2 mm, a width of 85 mm, a width of the outer ridge overlapped edge 2 and an width of the inner ridge overlapped edge 3 of 15 mm, respectively. The sleeve to be formed has an appropriate diameter that surrounds the outer circumference of the cable to which it is attached, and is colored in an appropriate color such as black or yellow.

The spiral sleeve for protecting the cable of the present invention constructed as described above is an aerial cable suspended by a hanger H from a messenger wire W suspended from a utility pole as shown in FIG. 5, which may damage the plastic jacket. The spiral strip 1 is wound around the outer periphery of C and mounted as described above. By attaching the spiral sleeve to the cable in this manner, damage to the cable coating is prevented even when the cable swings.

When the spiral sleeve attached to the cable is damaged, the spiral strip 1 is unwound and removed from the cable, and a new spiral sleeve is attached.

[Advantage of the Invention] As described above, according to the present invention, the outer ridge overlapping edge and the inner ridge overlapping edge formed on the front edge and the rear edge of the plastic spiral strip engage with each other. Plural engaging protrusions protruding downward and upward in a triangular shape are provided respectively, and the engaging protrusions on the front and rear edges of the spiral strip are engaged when wound around the overhead cable. Since it is configured to close the joint of the winding strips, even if strong wind blows, strong wind does not blow into the joints of the winding strips,
There is no risk of the spiral sleeve wound on the overhead cable coming off and the cable jacket can be protected from damage.

In addition, to wind the spiral sleeve around the aerial cable, place the outer protrusion of the front side edge of the succeeding winding strip on the inner protrusion edge of the rear winding edge of the preceding winding strip. Simply by overlapping and winding the overlapped edges, the engaging protrusions will be engaged so that they will not disengage, and you can remove them simply by unwinding the above-mentioned winding. The work is extremely quick and easy.

[Brief description of drawings]

1 is a sectional view of a part of one embodiment of the present invention, FIG. 2 is an end view thereof, FIG. 3 is a perspective view of an end portion of a spiral strip, and FIG.
The figure shows the superposed state of the spiral wound strip, FIG. 5 is the state of use, and FIG. 6 is the conventional example. 1: Spiral strip 1F: Front edge of strip 1 1R: Rear edge of strip 1: Outer ridge overlapping edge 3: Inner ridge overlapping edge 4: Engaging ridge protruding downward 5: Engaging ridge protruding upward 1a: Leading winding strip portion 1b: Subsequent winding strip portion

Claims (1)

[Scope of utility model registration request] 1. An engaging ridge (4) projecting downward on the lower surface of a front side edge (1F) of a plastic spiral strip (1) so as to have a triangular cross section and extending in the longitudinal direction of the strip (1). ) Are formed on the outer side of the spiral strip (1R) at the rear side edge (1R) of the spiral strip (1R) so as to project upward in a triangular cross section. ) Is provided with an inner protrusion overlapping edge portion (3) formed with a plurality of engagement protrusions (5) extending in the length direction, and the spiral strip (1) is spirally wound to form a preceding winding strip. Rear edge of the strip (1a) (1
R) on the upper engagement ridge (5) on the upper surface of the inner ridge overlapping edge (3), and on the outer edge of the front edge (1F) of the strip portion (1b) of the subsequent winding. A spiral sleeve for protecting an aerial cable in which a downward engaging projection (4) of the lower surface of the portion (2) is overlapped and engaged.