JP2582383Y2 - Pulling eye attachment for cable - 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 pulling eye attachment used for pulling a CV cable (crosslinked polyethylene insulated cable) having a metal corrugated sheath.

[0002]

2. Description of the Related Art When pulling a CV cable in which a metal corrugated sheath is covered on a cable core, only the cable core is pulled out of the metal corrugated sheath because the coefficient of friction of the contact surface between the metal corrugated sheath and the cable core is small. There is a risk of getting lost. In addition, it is necessary to integrate the metal corrugated sheath and the cable core at the cable pulling end so as to prevent water from entering the cable, and to perform waterproof treatment. For this reason, conventionally, a metal corrugated sheath has been fixed to a cable core and a pooling body compression-bonded to a cable conductor end using a two-material mixed epoxy putty material.

[0003]

[Problems to be Solved by the Invention] However, when the fixing is performed using an epoxy putty material, there are the following problems. That is, it takes about 24 hours for the epoxy putty material to completely cure, and there may be cases where sufficient time cannot be secured from installation to shipping. Further, when an epoxy putty material is made of a mixture of two materials, there is a case where a desired strength cannot be obtained due to a variation among operators. Further, the epoxy putty material has a drawback that it is weak against bending moment because it does not stretch even if the tensile strength is sufficient.

[0004] The present invention has been made to solve the above-mentioned difficulties, and an object of the present invention is to provide a cable pulling eye mounting portion which can obtain a predetermined strength in a short time.

[0005]

SUMMARY OF THE INVENTION A cable pulling eye mounting portion of the present invention is a cable pulling eye having a pulling body compression-connected to a conductor end of a cable having a metal corrugated sheath. In the attachment portion, a connecting member formed by fixing a plurality of metal strips to the outer surface of the metal corrugated pipe cut in advance in the length direction and welded along the length direction in advance to the pulling body. And a metal corrugated sheath. The divided metal corrugated pipe is placed over the end of the metal corrugated sheath, bound and fixed with an iron wire, and the plurality of metal strips are respectively fixed to the plug. -It is characterized by being fixed to the ring body by welding and providing a waterproof layer on the connecting member.

[0006] As the metal strip, an appropriate number of iron strips,
An iron wire or the like is used, and is fixed to the metal corrugated pipe and the pooling body by welding. The divided metal corrugated pipe may be used by dividing a part of an extra-long metal corrugated sheath made at the time of manufacturing a cable to which a pulling body is to be attached, into two parts. If you want to fix to, it is bound with iron wire. In addition, the waterproof layer provided on the connecting member has a structure in which a self-fusing insulating rubber tape for watertightness is wound, and a shrink tube is placed thereon.

[0007]

In the present invention, a plurality of metal strips are fixed to a metal corrugate sheath of a cable by fitting a metal corrugated pipe which is divided and has a plurality of metal strips fixed thereto in advance. The metal corrugated sheath has a hole at the welding point as in the case of direct welding to the steel plate, so that a predetermined strength can be obtained without inhibiting watertightness or causing corrosion in the sheath. Further, since a material such as an epoxy putty material which takes a long time to cure is not used, the assembly can be performed in a very short time.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the entire structure of an embodiment of the present invention, and FIGS. 2 to 5 show a partial structure and an assembled state of the embodiment.

In FIG. 1, the cable pulling eye mounting portion of the present invention includes a pulling body 3 compression-connected to a conductor end of a cable 2 having a metal corrugated sheath 1.
And a connecting member 4 fixedly straddling the rear end of the pooling body 3 and the metal corrugated sheath 1, and an eye nut 5 screwed into a screw portion at the front end of the pooling body 3.

The connecting member 4 is constructed in advance as follows. That is, as shown in FIG.
The metal corrugated pipe 6 having a diameter of 2 cm is cut in the length direction to be divided into two parts, and as shown in FIG.
Iron band of book (width 20mm, thickness 1.5mm, length 200m
m), which were welded along the length direction. When the connecting member 4 is mounted, the following is performed. First, as shown in FIG. 4, the end of the cable 2 having the metal corrugated sheath 1 is stepped off to expose the conductor 8, the insulator 9, and the metal corrugated sheath 1 sequentially. The pooling body 3 is inserted into the exposed conductor 8 and compression-connected. Reference numeral 10 indicates an anticorrosion layer made of polyvinyl chloride.

Next, as shown in FIG. 5, a sealing material is applied on the exposed conductor 8 and insulator 9 to form a self-fusing insulating rubber tape 11, for example, Cerbon tape (trade name of Showa Electric Cable Co., Ltd.) Is wound. Then, a metal corrugated pipe 6 divided into two as shown in FIG. 1 is put on the end of the metal corrugated sheath 1 and an iron wire 1 having a thickness of about 1 mm is formed.
Bind and fix with 2. At this time, araldite (trade name of epoxy-based adhesive) is applied to the inner surface of the metal corrugated pipe 6. Further, two iron strips 7 are welded to the pooling body 3. Finally, a self-fusing insulating rubber tape 13, for example, a Cerbon tape is wound around the connecting member 4, and a shrink tube 14 is put thereon, thereby waterproofing and protecting the whole. Further, a protective cylinder made of a metal such as iron or copper may be put on the shrinkable tube 14 for protection.
The cable pulling eye mounting portion of the present invention is configured as described above. The divided metal corrugated pipe 6 may be used by separating a part of an extra-length metal corrugated sheath made at the time of manufacturing a cable to which the pulling body 3 is to be attached, and dividing it into two.

[0012]

As described above, according to the cable pulling eye mounting portion of the present invention, a predetermined metal corrugated pipe having a plurality of metal strips fixed thereto is fitted to a metal corrugated sheath of the cable in advance. A material having the strength described above is easily obtained. Further, according to the present invention, since a material which takes a long time to cure like an epoxy putty material is not used, the assembly can be performed in a very short time.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a cable pulling eye mounting portion according to the present invention.

FIG. 2 is a side view showing a divided metal corrugated pipe constituting the embodiment.

FIG. 3 is a side view showing a connecting member constituting the embodiment.

FIG. 4 is a side view showing an assembling state of the embodiment.

FIG. 5 is a side view showing an assembling state of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Metal corrugated sheath 2 ... Cable 3 ... Pulling body 4 ... Connecting member 5 ... Pulling eye 6 ... Metal corrugated pipe 7 ... Metal strip 13 ... Self-fusing insulating tape 14 ... Shrinkage tube

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A 3-97329 (JP, U) JP-A 1-76137 (JP, U) JP-A 3-97330 (JP, U) JP-A 61- 88430 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H02G 15/00-15/196 H02G 7/02

Claims (1)

(57) [Scope of request for utility model registration] 1. A cable pulling eye mounting portion having a pulling body compression-connected to a conductor end portion of a cable having a metal corrugated sheath, which is previously cut and divided in a length direction. A connecting member formed by welding a plurality of metal strips to the outer surface of the metal corrugated pipe along the length direction and welding the metal corrugated pipes is disposed across the pulling body and the metal corrugated sheath. Then, the divided metal corrugated pipe is covered with an end of the metal corrugated sheath , bound and fixed with an iron wire, and the plurality of metal strips are respectively fixed to the pulling body by welding, and the connection is performed. A pooling eye mounting portion for a cable, wherein a waterproof layer is provided on a member.