JP2601442Y2 - Cable suspension structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable suspension structure in which a high-voltage trunk line or the like in a building is laid vertically and a cable end is lifted and supported at the uppermost portion.

[0002]

2. Description of the Related Art The applicant of the present invention has previously devised a cable retaining structure having the following configuration and applied for a utility model registration. That is, in the present invention, a cylindrical rubber spacer was attached to the insulator stripped end of the cable, and the suspension conductor was connected to the cable conductor end by compression. An eyebolt attached to the retaining portion of the insulator was integrated with the other end of the suspending conductor by a resin mold portion. Further, the connection portion between the cable conductor and the suspension conductor is straddled by the rubber spacer and the resin mold portion, and is covered by insulating cylinders provided with shielding layers on the inner and outer surfaces, respectively (Japanese Utility Model Laid-Open No. 4-35617). Reference).

[0003]

In this conventional cable suspension structure, a charged portion such as a connecting portion between a cable conductor and a suspending conductor is housed by an insulating cylinder provided with a rubber spacer or a shielding layer to expose a charged portion. Since there are no parts, there is an advantage that work in the periphery can be performed electrically safely.

However, in this cable suspension structure, since the suspension conductor and the eyebolt are connected by the resin mold portion, the tensile strength depends on the mechanical strength of the resin in the resin mold portion. It could not be said that it could sufficiently withstand the load at the time and the tension due to the cable's own weight after laying.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a cable suspension structure which can sufficiently withstand the load at the time of lifting and extending the wire and the tension due to the cable's own weight after laying. Aim.

[0006]

SUMMARY OF THE INVENTION A cable suspension structure according to the present invention has a bulging portion protruding in the radial direction at a tip end, and a suspension conductor compression-connected to a cable conductor end, and a curable resin. An insulating molded body formed in a shape to cover the outer surface of the suspending conductor and having a bulging portion substantially formed along the bulging portion of the suspending conductor; and a cable insulator stripping end. An insulating cylinder mounted on the portion, an insulating cylinder that straddles the insulating spacer and the insulating molded body and covers a connection portion between the cable conductor and the suspension conductor, and a tip of the insulating molded body. And a locking metal fitting which is screwed and held to a cylindrical holding metal fitting which is joined and locked to the bulging portion of the insulating molded body.

[0007]

The cable suspension structure of the present invention allows the cable conductor to expand at the tip of the suspension conductor when vertically laying high-voltage trunk lines or the like in a building or when lifting and fixing the cable end at the top. It is steadily connected to the detent fitting via the cylindrical holding fitting locked by using the projection. In addition, it is supported and fixed at the top as it is, and has a dielectric strength capable of applying power.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cable suspension structure according to the present invention. FIGS. 1 to 3 show one embodiment of the present invention. In FIG. 1, a suspension conductor 2 is compression-connected to an end of a cable conductor 1. The outer surface of the suspending conductor 2 is covered with an insulating molded body 3 formed of epoxy resin. A tubular insulating spacer 5 made of ethylene propylene rubber (EP rubber) is attached to the stripped end of the cable insulator 4.

The connecting portion between the cable conductor 1 and the suspension conductor 2 is covered by an insulating tube 6 disposed over the insulating spacer 5 and the insulating molded body 3. At the tip of the insulating molded body 3, a retaining metal member 8 is provided via a cylindrical holding metal member 7.
Are joined. The insulating cylinder 6 is formed by integrally molding a main body 6a made of EP rubber and shielding layers 6b and 6c made of semiconductive EP rubber on the inner and outer surfaces, respectively.
The shielding layer 6c on the outer surface of the insulating cylinder is electrically connected to the shielding layer 9 and the holding member 7 of the cable by semiconductive tapes 10 and 11, respectively. Reference numeral 12 denotes a tape protective layer, and 13 denotes a protective plastic tube.

As shown in FIG. 2, the suspending conductor 2 has a bulging portion 2b which bulges radially through a tapered surface 2a toward the tip. The insulating molded body 3 covering the outer surface of the suspending conductor 2 is formed to have a substantially uniform thickness, and has a tapered surface 3a and a bulging portion 3b substantially along the outer surface of the bulging portion 2a of the suspending conductor. Is provided.

The stopper 8 has a through hole 8a for hooking a towing wire or a hook or the like at the top, and a male screw 8b at the lower part of the outer peripheral surface. A tapered surface 7a facing the tapered surface 3a of the insulating mold body is provided at a lower portion of the inner surface of the holding metal member 7, and a female screw 7b corresponding to the external thread 8b of the retaining metal member is provided at an upper inner surface thereof. .
Then, the stopper 8 is brought into contact with the front end surface of the insulating mold body 3 via the rubber rubber plate 14 for buffering, and the male screw 8b is screwed into the female screw 7b of the holding metal fitting, whereby the taper of the insulating mold body is formed. The surface 3a and the tapered surface 7a of the holding fitting are locked. In this way, the suspending conductor 2 and the retaining metal member 8 are integrally connected via the insulating molded body 3 and the holding metal member 7 as shown in FIG.

Further, when assembling the above embodiment, it may be arranged as shown in FIG. That is, the insulating tube 6 is inserted deeply into the end of the cable that has been subjected to a predetermined terminal treatment, and the stopper metal 8 is screwed to the end of the insulating molded body 3 via the holding metal 7. In this state, the end portion of the cable conductor 1 and the suspending conductor 2 are compression-connected by a conventional method, and the insulating tube 6 is pulled back to a predetermined position on the compression connection portion so as to finish as shown in FIG.

[0013]

As described above, according to the cable suspending structure of the present invention, one end of the suspending conductor is compression-connected to the end of the cable conductor, and the other end of the suspending conductor is connected to the cylindrical holding bracket. The cable conductors are firmly supported by the retaining brackets, and can withstand the load during lifting and extending and the tension due to the cable's own weight after laying, and are supported and fixed at the top as they are. There is an effect of providing a dielectric strength capable of applying power. Since the charging part such as the connection part between the cable conductor and the suspension conductor is covered with the rubber spacer, the insulating cylinder and the insulating molded body, the installation work can be performed electrically safely.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a cable suspension structure of the present invention.

FIG. 2 is an exploded longitudinal sectional view showing a part of the embodiment.

FIG. 3 is an exploded longitudinal sectional view of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cable conductor 2 ... Suspension conductor 3 ... Insulation mold body 4 ... Cable insulator 5 ... Insulation spacer 6 ... Insulation cylinder 7 ... Cylindrical holding bracket 8 ... ...... Retaining bracket

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masahiro Noguchi 2-1-1, Sakae Oda, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Showa Electric Cable & Cable Co., Ltd. (56) References JP-A-3-118709 (JP, A) Japanese Utility Model Application No. 5-43719 (JP, U) Japanese Utility Model Application No. 4-131129 (JP, U) Japanese Utility Model Application No. 3-63023 (JP, U) Japanese Utility Model Application No. 3-50927 (JP, U) Japanese Utility Model Application No. Sho 51-130495 (JP, U) Jikken Hei 4-12752 (JP, Y2) Jigyo 60-8501 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02G 3/22-3 / 28 H02G 15/00-15/196

Claims (1)

(57) [Scope of request for utility model registration] A bulging portion protruding in a radial direction at a tip end;
A suspending conductor compression-connected to the cable conductor end, and a curable resin formed into a shape that covers the outer surface of the suspending conductor and substantially along the bulging portion of the suspending conductor. An insulating molded body in which a bulging portion is formed, an insulating spacer attached to a cable insulator stripped end, and the cable conductor and the suspending conductor straddling the insulating spacer and the insulating molded body. An insulating cylinder that covers the connection of
A suspension fitting joined to a tip of the insulation molding body and screwed and retained on a cylindrical holding fitting engaged with a bulging portion of the insulation molding body. Construction.