JPH09331621A - Anchor of wire-sheathed cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor for a wire-sheathed cable which can prevent or suppress not only the lateral motion of the wire-sheathed cable but also the rolling, etc., of a cable. SOLUTION: The anchor of a wire-sheathed cable is constituted by fastening a middle metal fitting 3 by the binding wire 4 being a middle metal fitting fastening means so that it may stick fast to the periphery of a wire sheath 1b, and turning up the wire sheath 1b in recurved form along the middle metal fitting 3, and pressing the turned-up wire sheath with a press metal fitting 5, and fastening the middle metal fitting 3 and the press metal fitting 5, and fastening these to a cable fixer 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchorage portion of an iron wire insulator cable, and more particularly to an anchorage portion of an iron wire insulator cable used for an upper portion of a submarine cable.

[0002]

2. Description of the Related Art Conventionally, as a retracting portion of an iron wire insulator cable used for a submarine cable or the like, for example, one having a structure shown in FIG. 3 has been used. Briefly explaining with reference to the drawing, the first metal fitting 5a having an inner diameter larger than the outer diameter of the cable is disposed on the outer circumference of the iron wire arranging equipment 1b, and the fixing metal fitting 2 is provided.
The iron wire insulator 1b is fixed so that the iron wire insulator 1b is spread along the first pressing metal fitting 5a, and the intermediate metal fitting 3 having an inner diameter larger than the outer diameter of the iron wire insulating material is attached to the first pressing metal fitting 5a. The iron wire insulator 1b is pressed along the intermediate metal fitting 3 by fastening the first pressing metal fitting 5a and the intermediate metal fitting 3 against each other by pressing it against the metal fitting 1b. The pressing metal fitting 5b is pressed to fix the intermediate metal fitting 3 and the second pressing metal fitting 5b.

As another structure, Japanese Patent Publication No. Sho 58-490.
In Japanese Patent Publication No. 85 and Japanese Utility Model Publication No. 47-39915, an end portion of an iron wire insulator is inserted through a hollow portion of an intermediate metal fitting, the iron wire insulator is folded back along the intermediate metal fitting, and further, an iron wire is clamped from its outer periphery by a holding metal fitting. It describes a structure of a retractable portion of an iron wire insulator cable that holds an insulator and is fastened to a fixed portion via the retainer.

[0004]

However, in the conventional retracting portion having such a structure, the inner diameter of each component is larger than the outer diameter of the cable. Therefore, since there is a gap between the cable and each component, movement of the cable in the longitudinal direction (movement such as pulling or projecting) can be prevented, but movement such as rolling of the cable cannot be prevented. . However, the movement of the cable, such as rolling, causes cracks and the like due to metal fatigue in the metal sheath inside the iron wire insulator. Therefore, it is an object of the present invention to provide a retractable portion of an iron-wire-insulated cable that can prevent or suppress not only movement of the iron-insulated cable in the longitudinal direction but also movement of the cable such as rolling.

[0005]

The retracting portion of the iron wire insulator cable of the present invention includes an intermediate metal fitting provided on the outer periphery of the iron wire insulator cable, and is folded back along the intermediate metal fitting so as to expand. At least one or more holding metal fittings for pressing the bracing wire and a fixing portion for fixing the iron wire laying cable via the holding metal fitting, in the retracting portion of the iron wire laying cable, the intermediate fitting is It is characterized in that it has an inner diameter that is the same as or slightly larger than the outer diameter of the glazing wire and that it is attached in close contact with the outer circumference of the glazing wire.

It is sufficient that the intermediate metal fitting can be brought into close contact with the glazing wiring so as not to damage the cable core, and the inner diameter thereof may be the same as or slightly larger than the outer diameter of the glazing wiring. 0 for the outer diameter of the wiring
It may be increased by ~ 5 mm. Further, since the pulling portion of the iron wire insulator cable is usually provided in the middle of the cable and the attachment is easy, it is generally a two-part type.

It is necessary to provide a means for integrating the two-part intermediate metal fittings in the above-mentioned two-part intermediate metal fitting, and examples of such means include bonding, fitting, and fastening. However, since it is necessary to bring the intermediate metal fitting into close contact with the wrapping wire, it is preferable to use a tightening means as the means. By using the intermediate metal fitting tightening means, by tightening the intermediate metal fitting, it is easier to attach the intermediate metal fitting more closely to the glazing wire than when fixing the intermediate metal fitting, and the tightening force is adjusted. By doing so, it is possible to adjust the adhesion between the intermediate metal fitting and the glazing wire, which is preferable.

As means for tightening the intermediate metal fitting, it is sufficient that the intermediate metal fitting can be brought into close contact with the wrapping wire, and there is no particular limitation such as tightening with bolts or tightening of the binding wire, but there is no particular limitation on the outer circumference of the intermediate metal fitting. Since the binding wire is provided and tightened by tightening the binding wire, the adhesive force between the intermediate metal fitting and the glazing wire can be freely adjusted, and there is no need to provide a space for the tightening means. This is preferable because it is possible to prevent the intermediate metal fitting, and hence the entire drawing section, from becoming larger. Further, when the bind wire is used as the tightening means, a groove is provided on the outer periphery of the intermediate metal fitting in the circumferential direction, and the bind wire is inserted into the groove to tighten and tighten the bind wire, whereby the bind wire from the intermediate metal fitting is tightened. It is preferable because it is possible to prevent the slippage and the falling of the intermediate metal fitting, and it is possible to bring the intermediate metal fitting into close contact with the brazing wire with a uniform force over the entire circumference.

Further, the glazing wire is folded back about one round along the intermediate metal fitting in an expanding manner, and the end portion side of the glazing wire is pressed by the first pressing metal fitting and the side facing the first pressing metal fitting. By holding the armoring wire with the second presser fitting, the armoring wire can be pressed more securely, and the end of the armoring wire fits inside and is not exposed to the outside. It is also preferable in terms of safety and the like.

Further, in addition to the above-mentioned safety, in order to easily attach the holding metal fittings and the like, it is necessary to fold back about one round along the intermediate metal fitting so as to hold the wiring wires and hold them. It is preferable to dispose the first and second pressing fittings and to fasten the both pressing fittings for attachment.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail. FIG. 1 is a diagram showing an embodiment of a retracting portion of an iron wire insulator cable of the present invention. In the figure, 1 is a cable, 1a is a cable core, and 1b is an iron wire insulator. Make sure that the iron wire is in close contact with the outer periphery of the armor 1b,
An intermediate metal fitting 3 is provided by tightening with a bind wire 4 which is a means for tightening the intermediate metal fitting, and the iron wire insulator 1 is attached to the intermediate metal fitting 3.
B is folded back in an expanding manner along the line b, and the folded iron wire is clamped so as to be covered with the retaining metal fitting 5, the intermediate metal fitting 3 and the retaining metal fitting 5 are fastened, and these are further fastened to the cable fixing portion 2. The iron cable insulation cable pulling section is constructed.

In such a retracting portion of the iron wire insulator cable of the present invention, it is sufficient that the pressing fitting can hold down the iron wire fitting expanded along the intermediate fitting, and the holding fitting can be pressed by one. It is possible to use a form, a form in which a plurality of press fittings are used, a form in which the press fittings are pressed to cover the folded iron wire covering. Further, as the pressing means, a method of tightening with a bind wire, a method of fastening with a bolt to an intermediate metal fitting, a method of fastening the pressing metal fittings with a plurality of pressing metal fittings sandwiching the intermediate metal fitting and the iron wire insulator can be used. .

Further, the iron wire insulator used in the present invention is not limited to this embodiment, and the iron wire insulator may be used as a return conductor, or may be used as an independent termination conductor connecting point of the return conductor. You can also In that case,
For example, a good conductor can be used for the holding metal fitting, etc., and the electric connection can be made by using the holding metal fitting as a terminal, thereby eliminating the need for electrically connecting the conductor to the iron wire garment, thereby improving work efficiency and cost. It is especially effective in terms of space.

[0014]

EXAMPLES Specific examples will be described below. In this example, a detention portion of an iron wire insulator cable, which is an upper part of a submarine cable having the structure shown in FIG. Explaining with reference to the drawing, the coating of the cable 1 is peeled off to expose the iron wire insulator 1b, and the outer diameter of the iron wire insulator 1 is set to 1 mm.
An intermediate metal fitting 3 having an inner diameter larger by mm and having a groove 3a provided on the outer circumference in the circumferential direction is fitted to the outer circumference of the iron wire garment 1b, and a bind wire 4 as an intermediate metal fitting fastening means is inserted into the groove 3a. The intermediate fitting 3 is tightly attached to the iron wire insulator 1b to be attached thereto. Then, the iron wire garment 1b is folded back about one round along the intermediate metal fitting 3, and the first metal fitting 5a and the second metal fitting 5b are pressed so as to press the iron wire garment 1b from both side surfaces of the intermediate metal fitting 3. It is clamped by and fastened by tightening with the tightening bolt 7. Further, the first holding metal member 5a is fixed to the cable fixing member 2 with a fixing bolt 6 to form a retracting portion of the iron wire insulator cable. In this embodiment, the intermediate fitting, the first and second holding fittings, and the cable fixing member are all of a two-part type.

With such a structure, the movement of the cable in the longitudinal direction (movement such as pulling or projecting) can be prevented in the retracted portion of the iron wire stake cable, and the iron wire stake and the intermediate metal fitting are in close contact with each other. Since it is attached in such a manner, it is possible to prevent movement such as rolling of the cable.

Further, as in the present embodiment, using the first and second pressing metal fittings 5a and 5b to clamp and clamp the iron wire armoring equipment 1b to clamp and clamp both metal fittings is as described above. This is preferable because it can be pressed more reliably and the pressing metal fitting can be easily attached. In addition, in the present embodiment, both the holding metal fittings 5a, 5b are fastened to hold the iron wire garment 1b, but it is sufficient that the both holding metal fittings can hold the iron wire garment, and each of the first and second holding metal fittings. The intermediate metal fitting 3
It is also possible to fasten them separately, or to press the metal fittings integrally so as to cover the iron wire armor.

Further, as in the present embodiment, the intermediate metal fitting 3 is also fixed by holding the iron wire insulator 1b with the first and second pressing metal fittings 5a and 5b and fastening both metal fittings with the tightening bolts 7. The binding line 4 is not particularly necessary at this point because it can be pressed. Therefore, since it is not necessary for the binding wire to always tighten the intermediate metal fitting, it is only necessary to break the intermediate metal fitting when attaching it, and it is not necessary to use a particularly strong binding wire.

[0018]

As described above, according to the retracting portion of the iron wire insulator-equipped cable of the present invention, movement of the cable in the longitudinal direction (movement such as pulling or protruding) can be prevented and the iron wire insulator Since the device and the intermediate metal fitting are closely attached to each other, it is possible to prevent movement such as rolling of the cable, thereby preventing the occurrence of cracks due to metal fatigue in the metal sheath due to rolling. can do. In addition, as a method of mounting the intermediate metal fitting, the intermediate metal fitting is attached by tightening the groove using the groove and the binding wire provided in the intermediate metal fitting. Since the iron wire insulator and the intermediate metal fitting can be brought into close contact with each other with a uniform tightening force over the entire circumference, the risk of damaging the cable core due to localized concentration of the tightening force is reduced. further,
The iron wire insulation is folded back about 1 round along the intermediate metal fitting and held by the first and second pressing metal fittings, so that the iron wire insulation can be held more securely and firmly, and the iron wire insulation is folded back about 1 rotation. As a result, the iron wire sheathing end portion is located on the inner peripheral side, which has excellent effects such as increased safety in terms of work.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a towing section of an iron wire insulator cable of the present invention.

FIG. 2 is a cross-sectional view showing a towing portion of an iron wire insulator cable according to another embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a retracting portion of a conventional iron wire insulator cable.

[Explanation of symbols]

 1 Cable 1a Cable Core 1b Iron Wire Insulation 2 Cable Fixing Member 3 Intermediate Metal Fitting 3a Groove 4 Bind Wire 5, 5a, 5b Holding Metal Fitting 6 Fixing Bolt 7 Tightening Bolt

Claims (5)

[Claims] 1. An intermediate metal fitting provided on the outer periphery of an armoring wire of an iron wire armoring cable, and at least one or more holding metal fittings for pressing the armoring wire folded back in an expanded shape along the intermediate metal fitting. In an anchorage portion of an iron wire insulator cable consisting of a fixing portion for fixing the iron wire insulator cable via the holding metal fitting, the intermediate metal fitting has an inner diameter equal to or slightly larger than the outer diameter of the insulator wire, An anchorage part for iron wire insulator cables, which is attached closely to the outer periphery of the insulator wire. 2. The iron wire insulation cable according to claim 1, wherein the intermediate metal fitting is of a two-divided type that is divided in a radial direction, and is clamped in close contact with the armoring wire by the intermediate metal fitting fastening means. Detention department. 3. An intermediate metal fitting fastening means for fastening the intermediate metal fitting by providing a groove on the outer circumference of the intermediate metal fitting in the circumferential direction, inserting a bind wire into the groove, and tightening the bind wire. The retaining part of the iron wire insulator cable according to claim 2. 4. An intermediate metal fitting tightened by an intermediate metal fitting tightening means so as to be tightly attached to the outer periphery of the glazing wire, and an end portion side of the glazing wire which is folded back about one round along the intermediate metal fitting so as to have an end side of the intermediate metal fitting. A first pressing metal fitting which is pressed and held between the first pressing metal fitting and a second pressing metal fitting which holds the insulation wire between the first metal fitting and the intermediate metal fitting by pressing. The anchoring portion of the iron wire arranging cable according to any one of claims 1 to 3, comprising a fixing portion for fixing any one of the pressing fittings. 5. The first and second pressing metal fittings are arranged so as to sandwich the intermediate metal fitting and the glazing wire, and the glazing wire is held by fastening both the metal fittings. The retaining part of the iron wire insulator cable according to claim 4.