JPH10340632A - Self-supporting cable, its manufacture, and manufacturing facilities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide self-supporting cable manufacturing facilities that are capable of being effectively applied to an optical cable, orderly taking up a self-supporting cable on its take-up device, and effectively preventing damage of that cable being let off for laying. SOLUTION: Self-supporting cable manufacturing facilities comprise a subsidiary-wire extrusion-coating device 27 for coating a subsidiary wire core 21a with an outer sheath, a cable extrusion-coating device 28 for coating a cable core 22a with an outer sheath, a corrugating device 34 and an intermittent heat-fusing device 38. The corrugating device 34 corrugates a cable body 22 on the same plane along the axis thereof. The intermittent heat-fusing device 38 comprises press-contact guiding feeder mechanisms 42, a heater mechanism 43, a cooler mechanism 44 and an interval holder mechanism 45. The extrusion- coating devices 27 and 28, the corrugating device 34 and the intermittent heat- fusing device 38 are arranged sequentially in series. That arrangement permits orderly taking-up of a self-supporting cable 20 thus formed on a take-up device 49.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-supporting cable used as a communication cable, a power distribution cable or the like laid aerial, a method of manufacturing the same, and a manufacturing facility.

[0002]

2. Description of the Related Art Conventionally, as a self-supporting cable of this type, as shown in FIG. 9, a self-supporting cable 4 in which a supporting wire 1 and a cable main body 2 are parallel to each other and connected by a connecting portion 3 is shown. The support wire portion 1 is made of a support wire core 1a made of a high tensile strength material such as steel, iron, or FRP having strength enough to withstand an overhead installation, and a thermoplastic resin covering the outer periphery of the support wire core 1a. And an outer coating 1b.

[0003] The cable main body 2 is composed of a cable core 2a in which a plurality of insulated wires or optical fibers are twisted, and a tape or the like is wound around the cable core 2a and bundled.
and an outer coating 2b made of a thermoplastic resin covering the outer periphery of the outer coating 1a, and the outer coating 1b and the outer coating 2b are integrally connected by a connecting portion 3 made of a thermoplastic resin, and have an eight-shaped cross section. It has been.

There is a structure in which the influence of wind is reduced by providing the connecting portion 3 intermittently along the longitudinal direction of the self-supporting cable 4. For example, Japanese Unexamined Patent Publication
As described in JP-A-119837.

However, according to the self-supporting type cable 4 of each of the above structures, the supporting wire portion 1 and the cable main body portion 2 are both arranged in a substantially linear parallel configuration and connected. There is no excess of the length of the cable core 2a of the cable body 2 with respect to the length, that is, no slack is given,
After being installed overhead, it is difficult to pull out and connect an insulated wire or an optical fiber constituting the internal cable core 2a from the middle of the tensioned self-supporting cable 4.

Therefore, the cable core 2a housed and arranged inside the cable body 2 is constructed so that the insulated wires and optical fibers constituting the cable core 2a can be pulled out and connected from the middle of the cable core 2a after being installed overhead. A structure in which an insulated wire or an optical fiber is provided with an extra length, that is, a slack is provided in advance, a structure in which the cable body 2 is connected to the support wire 1 with the slack being given, or a structure in which these are combined Etc. have been proposed.

For example, FIG. 10 shows a self-supporting type cable 4 having a structure in which a slack is given to a cable core 2a housed and arranged in a cable body 2, and an insulated electric wire 2c (or an insulated wire 2c constituting the cable core 2a). When the optical fibers are twisted and arranged, the so-called SZ twist method is used in which the twist direction is reversed at a relatively small cycle, and the insulated wire 2c is loosened so that it can be easily pulled out of the cable 4. I have. 2d is a tape for bundling the insulated wires 2c.

FIGS. 11 and 12 show a self-supporting type cable 4 having a structure in which the cable main body 2 itself is loosened and connected to the support wire 1. FIG. 11 shows the cable main body 2. A structure in which the cable body 2 is arranged in a reciprocating rocking manner on the outer periphery of the support wire portion 1 so as to surround the support wire portion 1 so as to give slack to the length of the support wire portion 1 and integrally connected by a connection portion 3. Have been.

On the other hand, FIG. 12 shows a structure in which the cable body 2 is intermittently slackened with respect to the support wire 1 and is connected and fixed by the forming and fixing portion 6 or a fixing component. .

FIG. 13 is a conceptual diagram of a manufacturing facility in which the molding and fixing portion 6 in the self-supporting cable 4 shown in FIG. 12 is made of a thermoplastic resin.
The outer coatings 1b, 2 respectively made of thermoplastic resin from 0, 11
b) The extended support wire portion 1 and the cable main body portion 2 are simultaneously fed out (the cable main body portion 2 has a longer unit feed length than the support wire portion 1 by the slack length), and is guided by adjacent circular guides having different circumferential lengths. The support wire portion 1 and the cable main body portion 2 are collectively wrapped by an intermittent molding die 13 that is intermittently arranged along the circumferential direction of the guide wheel 12 along the ring 12, and the guide wheel 1
The thermoplastic resin is injected by a reciprocating injection molding machine 14 that moves together with the injection molding machine 2, and after the injection, the process returns to the next mold 13, and the same injection molding operation is sequentially repeated.

On the other hand, the mold 13 into which the resin has been injected is cooled while moving as the guide wheel 12 rotates in a predetermined direction.
After cooling, the molding fixture 6 formed by the mold 13 is opened, and the operation returns to the initial operation.

The self-supporting cable 4 connected by the molding and fixing portion 6 is structured to be sequentially wound by a winding device 15.

[0013]

However, in the case of an optical cable, the method of securing the slack inside the cable core 2a by the above-mentioned SZ twisting method has a problem that it is difficult to remove the slack satisfactorily and to adopt it.

According to the manufacturing equipment of the system shown in FIG. 13, the support wire 1 and the cable main body 2 are rotated and moved along the guide wheels 12 having different concentric shafts and adjacent circumferences. While the positional relationship between the two is fixed, the injection molding machine 14 intermittently and periodically injects the thermoplastic resin,
The molding fixed portion 6 is formed by cooling, and the guide wheel 12 having a finite outer circumference naturally limits the rotational speed, and the molding method by heat requires an injection time and a cooling time. There was a disadvantage that the speed could not be increased.

Furthermore, the slack in the length of the cable main body 2 is given by the circumferential difference between the adjacent guide wheels 12,
Main body 2 having slack fixed intermittently to the cable
When the support wire portion 1 is stretched linearly, the support wire portion 1 is deformed in an arbitrary direction and retains slack, so that when the support wire portion 1 is wound around the winding device 15, the support wire portion 1 cannot be wound up neatly. Occasionally it may get stuck and cause trauma.

The object of the present invention is to provide a self-supporting cable which can be effectively applied to an optical cable, can wind up a winding device neatly, and can effectively prevent damage at the time of laying out, and a method and a method for manufacturing the same. To provide facilities.

[0017]

In order to solve the above-mentioned problems, the technical means of a self-supporting cable includes a cable body portion externally coated with a thermoplastic resin and a support wire portion externally coated with a thermoplastic resin. Are connected in parallel with each other, and the cable main body is provided with a meandering deformation in the same plane along its axis, and the axis is located on the plane. The support wire portions arranged in a straight line are arranged in parallel with each other, and the side of the cable body near the support wire portion due to the meandering is thermally fused to the support wire portion in the longitudinal direction of the support wire portion. The point is that it is intermittently connected along.

Further, at least one of the opposing sides of the cable main body and the support wire portion,
A structure in which fusion ribs made of the thermoplastic resin are provided integrally along the plane may be provided.

Further, the technical means of the above-mentioned method of manufacturing a self-supporting type cable is to provide a cable body externally coated with a thermoplastic resin with a deformation applying a meandering deformation in the same plane along the axis thereof. And supplying the cable main body along a plane along the axis while maintaining the deformation applied in the deformation applying step, and being externally coated with a thermoplastic resin in parallel with the cable main body. The supporting wire portions are supplied in a straight line along the plane of the axis thereof, and the outer coatings of the contact portions that come into contact with each other are heated and pressed against each other while being fused together. And a non-fused portion with a predetermined interval, and thereafter, an intermittent heat fusion step of cooling.

Further, before the deformation applying step, a cable outer coating step of applying the outer coating to the cable core of the cable main body, and a supporting wire for applying the outer coating to the supporting wire core of the support wire section. The method may include an external coating step.

Further, the technical means of the above-mentioned self-supporting cable manufacturing equipment is to provide a cable body portion externally coated with a thermoplastic resin with a meandering deformation in the same plane along the axis thereof. The outside of the contact portion where the device, the meandering cable body portion whose respective axes are fed in parallel along the same plane, and the linear support wire portion externally coated with a thermoplastic resin are in contact with each other. Heating means for heating and melting the coating, pressing means for pressing the cable main body part and the support wire part in a direction approaching each other so as to press-fit at the contact part, and a fusion part fused by the heating means and the pressing means And an intermittent heat fusion device having a spacing means for maintaining a spacing in a non-fused portion between the cable main body portion and the support wire portion at the time of the fusion.

Further, there is provided a cable external coating device for applying the external coating to the cable core of the cable main body portion, and a support wire external coating device for applying the external coating to the support wire core of the support wire portion. The external coating device, the deformation applying device, and the intermittent heat fusion device may be sequentially arranged in series.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show a self-supporting cable 20.
The self-supporting cable 20 includes a support wire 21 and a cable main body 22 connected to the support wire 21.
The supporting wire portion 21 is made of a high-strength body such as steel, iron, or FRP having strength enough to withstand an aerial installation, and a thermoplastic resin covering the outer periphery of the supporting wire core 21a. And an outer coating 21b made of

The cable body 22 is composed of a cable core 22a in which a plurality of insulated wires or optical fibers are twisted and wound around an outer periphery thereof with a tape or the like, and a thermoplastic resin covering the outer periphery of the cable core 22a. Outer coating 2
2b.

Further, the support wire 21 and the cable main body 2
The fusion ribs 21c, 22c made of a thermoplastic resin are provided integrally on the respective outer peripheral surfaces on the sides facing each other as a part of the outer coatings 21b, 22b along the respective axial directions. .

The cable main body 22 is linearly arranged in a state where a waveform (meandering) of a predetermined period is applied in the same plane along its axis and the rib 22c. And the support line portion 21 formed by the waveform of the rib 22c of the cable main body portion 22.
A connecting portion 2 whose close side is thermally fused to the rib 21 c of the support wire portion 21 and intermittently connected along the longitudinal direction of the support wire portion 21.
It is set to 3.

At this time, the support wires 21 are arranged in parallel so that the axis and the rib 21c are located on the plane. Further, the cycle length and height of the waveform of the cable main body 22 may be appropriately determined according to a desired slack amount. Further, the cross-sectional shape of the connecting portion 23 of the support wire portion 21 and the cable main body portion 22 fused together is the same as that of the conventional self-supporting cable 4 shown in FIG.
It has a U-shaped structure, and is a structure in which a conventional fixing bracket can be used near an electric pole when laying overhead.

FIGS. 4 to 8 show an example of equipment for manufacturing the above-mentioned self-supporting cable 20.
And a cable core supply device 26 including a drum and the like for feeding and supplying the cable core 22a.

On the downstream side in the supply direction of the support wire core 21a and the cable core 22a, the support wire core 21a and the cable core 22a are extrusion-coated with a thermoplastic resin to form an outer coating 21b.
Extrusion coating apparatus 27 for supporting wires and extrusion coating apparatus 28 for cables as external coating apparatuses for forming 22b, and cooling tanks 29 and 30 including water tanks for cooling and solidifying the external coating 21b and the external coating 22b formed by extrusion coating. Prepare sequentially.

When each of the outer coatings 21b and 22b is extrusion-coated by each of the extrusion coating devices 27 and 28, the outer coating 21b
A rib 21c and a rib 22c are integrally formed on the lower surface of the outer cover 22b and the upper surface of the outer coating 22b, respectively.

Further, on the downstream side of each of the cooling tanks 29 and 30, there are provided sending devices 31 and 32 comprising a pair of upper and lower circulatingly movable transport conveyors for sending out the support wire portion 21 and the cable body portion 22, respectively. Cable body 2
The feed amount adjusting roller 33 and the waveform imparting device 3 as a deformation imparting device are provided on the downstream side of the sending device 32 on the second side.
4 are provided.

As shown in FIG. 6, a pair of feed amount adjusting rollers 33 are provided so as to sandwich the cable main body 22 from above and below, and the peripheral surface of each feed amount adjusting roller 33 is formed on the outer peripheral surface of the cable main body 22. And the upper feed amount adjusting roller 33 has a rib 2
In order to guide 2c and send it out in a positioning shape, rib 22
A rib fitting groove 33a in which c is guided in a fitting shape is formed along the circumferential direction. Here, the rotation of each feed amount adjusting roller 33 causes the cable body 2 with the rib 22c to be fed into the waveform applying device 34 along the vertical axis P along the axis of the cable body 22 and the center of the rib 22c. It is.

The position of the cable main body 22 in the direction of bending given to the cable main body 22 by the feed amount adjusting roller 33 is determined, and the cable main body 22 is moved in conjunction with the movement of the waveform applying device 34. The feeding speed is finely adjusted and fed into the waveform applying device 34.

The waveform applying device 34 includes a plurality of guide rollers 34a, 34b, 34c, and has a structure in which the outer peripheral surface of the cable main body 22 fed by the feed amount adjusting roller 33 is rotatably contacted. The guide rollers 34a, 34b, 34c are linked to each other by a link mechanism or the like. Further, each guide roller 34a,
34b and 34c are disposed along the vertical plane P so as to guide the cable main body 22 along the vertical plane P,
The swinging operation can be freely performed in the vertical direction substantially perpendicular to the moving direction of the cable main body 22, and the vertical swinging of each of the guide rollers 34a, 34b, 34c causes the cable main body 22 to move along the vertical plane P. A bending deformation having a waveform having a predetermined period is given.

The guide rollers 34a, 34b, 3
The size of 4c, the amplitude of the vertical swing, the interval between the adjacent guide rollers 34a, 34b, 34c, and the like are appropriately determined so that a desired bending deformation can be given. The guide rollers 34a and 34c for guiding the rib 22c side of the cable main body 22 are provided with rib fitting grooves having the same configuration as that of the feed amount adjusting roller 33.

The cable main body 22 having the waveform deformed by the waveform imparting device 34 has the vertical plane P
Along the path, and is fed into the downstream intermittent heat fusion device 38 while maintaining the deformation of the waveform.

On the other hand, a guide roller 39 for positioning is provided rotatably on the downstream side of the sending device 31 on the side of the support wire portion 21, and the guide roller 39 is provided with the feed amount adjusting roller 33 and the guide roller 39. Similarly, as shown in FIG. 5, a pair of support wire portions 21 is provided so as to be sandwiched from above and below, and the peripheral surface of each guide roller 39 is formed in an arc shape along the outer peripheral surface of the support wire portion 21 and lower. Side guide roller 3
The rib 21c has a rib fitting groove 39a in which the rib 21c is guided in a fitting manner so as to guide the rib 21c and send out the positioning.
Are formed along the circumferential direction. Here, the rotation of each guide roller 39 causes the support wire portion 2 provided with the rib 21c to rotate.
1 is a vertical plane P along the axis of the support wire 21 and the center of the rib 21c, that is, an intermittent located on the downstream side along the same vertical plane P as the vertical plane P on which the cable body 22 is guided. It is configured to be sent to the heat fusion device 38.

Accordingly, the support wire 21 and the cable body 2
2 is fed to the intermittent heat fusion device 38 in a state of being vertically aligned along the same vertical plane P.

The intermittent heat welding device 38 is provided with the vertical surface P
Guide transport mechanism 42 as pressing means for transporting the support wire portion 21 and the cable main body portion 22 to the downstream side along the path, and the support wire portion 21 and the cable main body portion in the middle of the transport path in the crimp guide transport mechanism 42 Heating mechanism 43 as heating means for heating 22 and heating mechanism 4
3. A cooling mechanism 44 as a cooling means for cooling and solidifying the portion heated and melted by the downstream side at a downstream side thereof, and an interval at a non-fused portion between the support wire portion 21 and the cable main body portion 22 when the crimping guide conveying mechanism 42 conveys the portion. And an interval holding mechanism 45 as an interval holding means for holding the distance.

The crimping guide transport mechanism 42 is a pair of upper and lower transport conveyors 42a, 42 which can circulate freely and transport the support wire portion 21 and the cable body portion 22 from above and below.
b, the interval between the two conveyors 42a, 42b,
Support line portion 21 of cable main body portion 22 conveyed in a wave shape
The side portion is set at an interval where the side portion is pressed against the support line portion 21 conveyed linearly with appropriate pressure. Further, on the outer peripheral surface of the lower conveyor 42b, an irregular shape retaining guide 42c corresponding to the waveform shape of the cable main body 22 is provided along the circumferential direction.

The heating mechanism 43 is arranged on one side of the support wire portion 21 and the cable main body 22 which are carried by the crimping guide carrying mechanism 42, and is intermittently moved by the crimping guide carrying mechanism 42. The high temperature is concentrated on the outer coatings 21b and 22b (the ribs 21c and 22c as a part of the outer coating in the present embodiment) at the contact portion between the support wire portion 21 and the cable main body 22 which are in contact with the pressure contact. It is configured to supply gas and the like to be heated and melted, and not to heat other parts.

Like the heating mechanism 43, the cooling mechanism 44 is disposed on one side of the support wire portion 21 and the cable main body portion 22 which are transported by the pressure bonding guide transport mechanism 42, It is configured to intensively supply cold air or the like to the cooled portion to cool and solidify.

The interval maintaining mechanism 45 includes a transport belt 45a circulating and rotatable, which is disposed on the other side of the support wire portion 21 and the cable main body portion 22 transported by the pressure guide transport mechanism 42. A plurality of prismatic spacer members 45b arranged on the outer peripheral surface of the conveyor belt 45a so as to protrude outward at a predetermined interval in the circumferential direction;
5a, each spacer member 45b enters the gap between the conveyed support wire portion 21 and the cable body 22 from the side, and the support wire portion 21 during the conveyance is moved.
The distance between the cable body 22 and the cable body 22 is maintained at a predetermined interval.

Further, on the downstream side of the intermittent heat fusion device 38, a take-off device 48 composed of a pair of upper and lower circulating and conveyable conveyors for taking the self-supporting type cable 20 fused together is arranged. A winding device 49 including a drum or the like that winds the self-supporting cable 20 pulled by the pulling device 48 is disposed downstream of the winding device 49.

Further, in this embodiment, the support wire extrusion coating device 27, the cooling bath 29, and the delivery device 31 are provided so that the support wire portion 21 side and the cable body portion 22 side are supplied and guided up and down. And the like, and a cable extrusion coating device 28, a cooling tank 30, a delivery device 32, and the like are vertically arranged, and each support wire core supply device 25, cable core supply device 26, extrusion coating devices 27 and 28, cooling Vessels 29, 3
0, sending devices 31, 32, feeding amount adjusting roller 33,
A corrugating device 34, a guide roller 39, an intermittent heat fusion device 38, a take-up device 48, and a take-up device 49 are arranged in series.

Next, a method of manufacturing the self-supporting cable 20 by this manufacturing equipment will be described. The support wire core 21a fed and supplied from the support wire core supply device 25 is externally coated on the outer periphery thereof by a support wire extrusion coating device 27. Coating 21b
Is extrusion-coated, and then the outer coating 21b is
To solidify (supporting wire outer coating step).

The cable core 22a fed and supplied from the cable core supply device 26 is subjected to extrusion coating on the outer periphery thereof by a cable extrusion coating device 28. Thereafter, the external coating 22b is cooled in a cooling tank 30. Solidifies (cable outer coating process).

The supporting wire 21 and the cable main body 22 provided with the outer coatings 21 b and 22 b are sent out by sending devices 31 and 32, respectively, and the supporting wire 21 is guided along the vertical plane P via guide rollers 39. In this state, the sheet is fed into the intermittent heat welding device 38.

The cable body 22 is positioned by the feed amount adjusting roller 33, and has a predetermined period and amplitude waveform along the vertical plane P in cooperation with the feed amount adjusting roller 33 and the waveform applying device 34. Deformation is applied (deformation applying step), and the wafer is sent to the intermittent heat fusion device 38 along the vertical plane P while maintaining the deformation.

The feed amount per unit of the support wire portion 21 and the cable main portion 22 by the sending devices 31 and 32 is larger by the slack amount in the cable main portion 22.

The support wire portion 21 and the cable main body portion 22 which are sent in parallel to each other are sequentially conveyed in a predetermined direction while being sandwiched between the two conveyors 42a and 42b of the crimp guide conveying mechanism 42. Go. When being conveyed while being sandwiched between the two conveyors 42a and 42b, the side of the cable main body 22 that is deformed into a waveform near the support wire portion 21;
That is, the rib 21c of the support wire 21 and the cable body 22
And the ribs 22c are intermittently pressed in contact with each other while being spaced apart in the longitudinal direction.

When transported in this intermittent contact state,
The contact portion is heated by the heating mechanism 43 to be locally softened and melted, and pressed by the pressing force in a direction close to each other by a predetermined distance. Thereafter, the molten portion is cooled and solidified by the cooling mechanism 44 and fused to each other. You. In addition, at the time of this conveyance, the spacer member 45b of the space holding mechanism 45 enters between the support wire part 21 and the cable body part 22 which are separated from each other, and the support wire part 21 and the cable body in the conveyance path. The gap with the part 22 is maintained (intermittent heat fusion step).

Then, the support wire portion 2 is interposed by the intermittent heat fusion device 38.
The self-supporting cable 20 in which the cable 1 and the cable main body 22 are intermittently fused is taken up by a take-up device 48 and taken up by a take-up device 49.

As described above, the cable main body 22 is intermittently heat-sealed to the support wire portion 21 in a state where the corrugated regular deformation is given in the same plane along the axis thereof in advance. The amount of slack applied to the cable body 22 is also stable, and the support wire 21 after intermittent fusion fixing is fixed.
The positional relationship and deformation between the cable and the cable main body 22 are also regular, and the winding to the winding device 49 can be performed neatly, so that damage at the time of feeding and laying can be effectively prevented.

The method of securing the slack amount of the cable main body 22 is not based on the SZ twisting method, and can be effectively applied to an optical cable without any trouble.

Further, as in this embodiment, each support wire core supply device 25, cable core supply device 26, extrusion coating devices 27 and 28, cooling tanks 29 and 30, delivery devices 31, 3
2, feeding amount adjusting roller 33, waveform applying device 34, guide roller 39, intermittent heat fusing device 38, take-off device 48,
If the winding devices 49 are arranged in series, by operating them simultaneously, the self-supporting cable 20
Can be manufactured in a single step, productivity can be improved, and manufacturing costs can be reduced.

Further, in the manufacturing method shown in FIG. 13, it is difficult to increase the processing speed to increase the productivity, because there is a difficulty in the equipment technology, and it is necessary to increase the outer diameter of the guide wheel 12. However, as in the present embodiment, the heating mechanism 43 extends along the moving direction of the support wire 21 and the corrugated cable main body 22 as in the present embodiment.
And a structure in which the cooling mechanism 44 is provided, it is possible to manufacture the self-supporting cable 20 by heat-sealing and fixing the support wire portion 21 and the cable main body portion 22 continuously.
By increasing the length of the heating mechanism 43 and the cooling mechanism 44, the production speed (intermittent heat fusion speed) can be increased, and the space efficiency of the equipment is also improved.

Further, since the conveyor 42b is provided with the shape-retaining guide 42c, both conveyors 42a, 42
When the support wire portion 21 and the cable main body 22 are pressed in b, the deformation of the waveform imparted to the cable main body 22 is stably held, and here, the cable main body 22 in the self-supporting cable 20 is stable. Can be secured.

Further, while the supporting wire portion 21 and the cable main body 22 are conveyed in a pressed state by the crimping guide conveying mechanism 42, the spacer member of the gap holding mechanism 45 is provided in the gap between the supporting wire portion 21 and the cable main body 22. 45b invades,
In order to maintain the interval between them, a stable slack in the cable body 22 of the self-supporting cable 20 can be secured from this point as well.

In the above embodiment, the outer sheaths 21b, 22b are attached to the support wire core 21a and the cable core 22a.
, An external coating step of applying a deformation, a deformation applying step of applying a deformation to the cable body portion 22, and an intermittent heat fusion step of intermittent heat fusion are shown in a continuous manner. The method may be performed independently.

The rib 21 provided on the support wire portion 21
c and the rib 22c provided on the cable main body 22 are fused to each other. However, a method in which the rib is provided on only one of the support wire 21 and the cable main body 22 may be used. Well, even each outer coating 21
When the thickness of b, 22b is sufficient for heat fusion or when it has strength, each rib 21c,
The outer coating 22c is unnecessary, and the outer coatings 21b and 22b may be fused to each other.

Although the structure in which the ribs 21c and 22c are provided continuously along the longitudinal direction is shown, a structure in which the ribs 21c and 22c are provided intermittently corresponding to the connecting portions may be used. It is not limited to the structure.

Further, the heating method using the heating mechanism 43 is not limited to the indirect heating method using a high-temperature gas, but may be an indirect heating method using a plasma or an arc, or a contact heating method using a high-temperature heating element. The method is not limited to this.

[0065]

As described above, according to the self-supporting cable of the present invention and the method and apparatus for manufacturing the same, the cable body is provided with a regular wave-shaped regular shape in the same plane along its axis. This is a method in which heat is intermittently fused to the support wire in a deformed state.Because the cable body has a margin of length, even after being laid aerial, it will be in the middle of the self-supporting cable. Can be easily branched and connected, and meandering deformation to the cable body can be applied stably. The amount of slack applied to the cable body here is also stable, and intermittent fusion fixing The positional relationship and deformation between the support wire portion and the cable main body later are also regular, and the winding to the winding device can be performed orderly. Therefore, damage due to catching during the feeding and laying out can be effectively prevented. There is an advantage to say.

Another advantage is that it can be effectively applied to optical cables.

Further, each external coating device, deformation applying device,
The intermittent heat fusion devices are arranged in series in order, and the external coating process, deformation applying process, and intermittent heat fusion process are performed continuously, improving the productivity of self-supporting cables and improving the space efficiency of equipment. There is an advantage of improving.

[Brief description of the drawings]

FIG. 1 is a partial side view showing a self-supporting cable according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a schematic front view of a facility for manufacturing a self-supporting cable.

FIG. 5 is a side view of a guide roller portion.

FIG. 6 is a side view of a feeding amount adjusting roller portion.

FIG. 7 is an enlarged view of the intermittent heat fusion device.

FIG. 8 is a plan view of the same.

FIG. 9 is a side view of a conventional self-supporting cable.

FIG. 10 is a side view of a self-supporting cable as a proposal example.

FIG. 11 is a side view of a self-supporting cable as a proposal example.

FIG. 12 is a side view of a self-supporting cable as a proposal example.

FIG. 13 is a schematic explanatory view showing a facility for manufacturing the self-supporting cable shown in FIG.

[Explanation of symbols]

 Reference Signs List 20 self-supporting cable 21 support wire portion 21a support wire core 21b outer coating 21c rib 22 cable main body 22a cable core 22b outer coating 22c rib 23 connecting portion 27 support wire extrusion coating device 28 cable extrusion coating device 29 cooling bath 30 Cooling tank 33 Feed-in amount adjusting roller 34 Waveform applying device 38 Intermittent heat fusion device 39 Guide roller 42 Pressure bonding guide transport mechanism 43 Heating mechanism 44 Cooling mechanism 45 Interval holding mechanism 48 Take-up device 49 Take-up device

Claims (6)

[Claims] 1. A self-supporting cable in which a cable main body externally coated with a thermoplastic resin and a support wire part externally coated with a thermoplastic resin are connected in parallel with each other. The cable main body portion, which is provided with meandering deformation in the same plane, and the support line portions, whose axes are linearly arranged on the plane, are arranged in parallel with each other. A self-supporting cable, wherein a side of the cable body near the support wire portion due to the meandering is thermally fused to the support wire portion and intermittently connected along the longitudinal direction of the support wire portion. 2. A fusion rib made of the thermoplastic resin along the plane is integrally provided on at least one of the opposing sides of the cable main body portion and the support wire portion. The self-supporting cable according to claim 1, wherein: 3. A deformation applying step of applying a meandering deformation to the cable main body externally coated with a thermoplastic resin in the same plane along the axis thereof, and maintaining the deformation applied in the deformation applying step. While supplying the cable main body along a plane along the axis, the support wire part, which is externally coated with a thermoplastic resin, extends in parallel with the cable main body along the plane. While supplying the linear coating in close proximity and heating the outer coating of the contacting parts that are in contact with each other and pressing and fusing them together, the non-fused part between the cable main body and the supporting wire part maintains a predetermined interval, and thereafter And a step of intermittent heat-sealing for cooling. 4. A cable outer coating step of applying the outer coating to the cable core of the cable main body before the deformation applying step, and a support wire for applying the outer coating to a support wire core of the support wire section. 4. The method for manufacturing a self-supporting cable according to claim 3, further comprising an outer covering step. 5. A deformation applying device for applying a meandering deformation to a cable main body externally coated with a thermoplastic resin in the same plane along the axis thereof, wherein the respective axes are parallel along the same plane. Heating means for heating and melting the external coating of the contact portion of the meandering cable main body portion supplied to the contact portion and the linear support wire portion externally coated with the thermoplastic resin, and crimping at the contact portion Pressing means for pressing the cable body portion and the support wire portion in directions approaching each other, cooling means for cooling the fused portion fused by the heating means and the pressing means, and a cable body portion for the fusion A self-supporting cable manufacturing facility, comprising: an intermittent heat-sealing device having a space holding means for holding a space between a non-fused portion of the support wire and the support wire portion. 6. A cable external coating device for applying the external coating to a cable core of the cable main body portion, and a support wire external coating device for applying the external coating to a support wire core of the support wire portion. The self-supporting cable manufacturing equipment according to claim 5, wherein an external coating device, the deformation applying device, and the intermittent heat fusion device are sequentially arranged in series.