JP6369679B2 - Coated cable manufacturing method and coated cable manufacturing apparatus - Google Patents

Description

  The present invention relates to a coated cable manufacturing method and a coated cable manufacturing apparatus, and more particularly to a coated cable manufacturing method in which a cable is disposed on a metal sheath formed by joining a butt after forming a metal plate into a tubular shape. And an apparatus for manufacturing a coated cable.

A covered cable in which a power cable is covered with a metal sheath is known. This coated cable is manufactured by arranging a power cable in a metal sheath formed into a tubular shape while forming a metal plate into a tubular shape.
As an example, a composite wire in which an outer peripheral surface of a steel wire is covered with an aluminum tape is known (see, for example, Patent Document 1). The manufacturing method of this composite wire will be explained. A steel wire whose surface is roughened by sandblasting is continuously sent out from the drum, and an aluminum tape is sent along the steel wire below the steel wire. Is molded into a pipe shape. Next, the abutting portion of the aluminum tape is welded to form an aluminum pipe, and the aluminum pipe is formed in accordance with the cross-sectional shape of the steel wire so that the aluminum pipe and the steel wire are brought into close contact with each other, and then wound on a drum.

Here, it is important to firmly bond the aluminum pipe and the steel wire, and many proposals have been made for bonding methods of two different kinds of materials.
As an example, a bonding method is known in which a strong anchoring effect between an adherend and an adhesive can be obtained by forming a turn on a metal surface (see, for example, Patent Document 2).
Moreover, the structure which destroyed the corrosion-resistant oxide film and exposed the fresh surface by giving knurling to each dissimilar metal thin plate, and the adhesion | attachment of metals was known effectively (for example, patent document 3). reference).
Further, as a method for forming irregularities on a metal plate, a method in which a machining groove is provided on the surface of a tool roll is known (for example, see Patent Document 4).

  The completed covered cable is wound up by a drum and stored in a factory or a warehouse. The cable is bent when it is wound around the drum. In order to prevent the metal sheath from buckling due to the bending, the metal sheath is previously bellowed before being wound around the drum.

JP 62-104620 A JP 59-85392 A JP 58-119854 A JP 58-18092 A

However, since the number of processes for processing the metal sheath is increased, the production capacity decreases. Further, since the outer diameter of the covered cable is increased by the amount of the bellows processing, the length of the covered cable wound around the drum is reduced, and the length of the covered cable that can be manufactured in one process is shortened.
Therefore, by covering the outer side of the metal sheath with a resin layer to make the coated cable flexible, it can be wound on a drum without performing bellows processing. At this time, the metal sheath and the resin layer need to be firmly bonded with an adhesive or the like, but the metal sheath surface having a smooth surface is likely to cause unevenness of the adhesive and is uniform in the circumferential direction and the axial direction of the metal sheath. It is difficult to obtain strong adhesive strength.
Further, in the above cited references 1 to 4, in a series of steps of manufacturing a coated cable and winding it on a drum, no consideration is given to a step for firmly bonding the resin layer to the metal sheath.

  Therefore, the present invention has been made in view of the above problems, and a coated cable capable of firmly bonding a resin layer to the outside of a metal sheath in one step without reducing the production capacity of the coated cable. An object of the present invention is to provide a manufacturing method and an apparatus for manufacturing a coated cable.

In order to solve the above problems, the present invention is a method for manufacturing a coated cable, the step of forming a metal sheath by roll forming a metal plate, the step of arranging a cable in the metal sheath being formed, Joining the butted ends of the metal plates in the metal sheath in which the cable is disposed, processing the surface of the metal sheath, and forming a resin layer on the processed surface of the metal sheath; the are performed by the series of manufacturing steps of winding on the drum to produce a coated cable, the step of processing the surface of the metal sheath, disposed so as to sandwich the metal sheath arranged in the cross sectional direction of the metal sheath A pair of first processing rollers are brought into contact with the metal sheath that is sent to roughen the surface of the metal sheath, In addition, a process for roughening the surface of the metal sheath by bringing a pair of second processing rollers arranged so as to sandwich the metal sheath in line with the longitudinal direction of the metal sheath into contact with the fed metal sheath characterized in that the applied.

  Moreover, it is preferable to have a step of forming a resin layer on the processing surface of the metal sheath via an adhesive.

The present invention is an apparatus for manufacturing a coated cable, comprising a metal plate sending portion for feeding a metal plate, a sheath forming portion for shaping a metal sheath by roll forming a metal plate sent by the metal plate sending portion, and the sheath A cable placement portion for placing a cable in the metal sheath being formed by the forming portion; a joint portion for joining the butted ends of the metal plates in the metal sheath where the cable is placed; and a surface of the metal sheath And a resin supply unit that supplies resin to the surface of the metal sheath processed by the surface processing unit, and the surface processing unit is arranged in a cross-sectional direction of the metal sheath. And a pair of first processing rollers that are in contact with the metal sheath and the cable. Wherein arranged in the longitudinal sectional direction of the metal sheath is disposed so as to sandwich the metal sheath, respectively, characterized in Rukoto and a pair of second processing rollers abutting on said metal sheath was.

  Moreover, it is preferable to provide the adhesive supply part which supplies the adhesive agent of the resin supplied from the said resin supply part, and the said metal sheath on the surface of the said metal sheath processed by the said surface processing part.

  According to the present invention, the resin layer can be firmly bonded to the outside of the metal sheath in one step without reducing the production capacity of the covered cable.

It is a front view of the manufacturing apparatus of a covered cable. It is a front view of a roll forming part. It is a front view of a surface processing part. It is a front view of the roller of a surface processing part. It is a front view of a resin coating part. It is a cross-sectional view of a covered cable.

  A preferred embodiment of the present invention will be described with reference to the drawings. In addition, embodiment shown below is one illustration and can take various embodiment in the scope of the present invention.

<Coated cable manufacturing equipment>
FIG. 1 is a front view of a coated cable manufacturing apparatus.
As shown in FIG. 1, the coated cable manufacturing apparatus 100 includes a cable delivery unit 1, a cable placement unit 2, a metal plate delivery unit 3, a roll forming unit 4, a joining unit 5, a take-up unit 6, The surface processing part 7, the resin coating | coated part 8, and the cable winding part 9 are provided.

  The cable sending section 1 is arranged on the most upstream side in the production line by the coated cable production apparatus 100. The cable delivery unit 1 includes a drum 1a around which a cable 10 before coating is wound, and a support unit 1b that rotatably supports the drum 1a. As the drum 1a rotates, the cable 10 wound around the drum 1a is sent out toward the roll forming unit 4 arranged on the downstream side of the production line. The cable sending unit 1 sends the cable 10 from a position higher than the roll forming unit 4.

  The cable placement unit 2 is arranged on the downstream side of the production line of the cable sending unit 1. The cable placement section 2 is for placing the uncovered cable 10 delivered from the cable delivery section 1 in a metal sheath 11a to be molded, and includes a gantry 2a and a plurality of feeds provided rotatably on the gantry 2a. And a roller 2b. The upper surface of the gantry 2a is an inclined surface that descends downward from the upstream to the downstream of the production line, and feed rollers 2b are arranged on the inclined surface along the production line at regular intervals. The cable 10 is guided by the roller 2b and sent toward the downstream side of the production line.

  The metal plate sending part 3 is arranged on the downstream side of the production line of the cable sending part 1. The metal plate delivery unit 3 includes a drum 3a around which the metal plate 11 is wound, and a support unit 3b that rotatably supports the drum 3a. As the drum 3a rotates, the metal plate 11 wound around the drum 3a is sent out toward the roll forming unit 4 on the downstream side of the production line. The metal plate 11 delivered from the metal plate delivery unit 3 is not particularly limited, but for example, stainless steel or aluminum is preferably used.

FIG. 2 is a front view of the roll forming unit.
The roll forming unit 4 is arranged on the downstream side of the production line of the cable arranging unit 2 and the metal plate sending unit 3, and functions as a sheath forming unit that forms the metal plate 11 into the metal sheath 11a by roll forming. The roll forming unit 4 includes a gantry 4a extending along the flow direction of the production line, a plurality of former rollers 4b disposed on the gantry 4a, and a cable guide roller 4c disposed above the former roller 4b. A tape guide roller 4d disposed on the downstream side of the plurality of former rollers 4b, and a left and right guide roller 4e disposed on the downstream side of the tape guide roller 4d.
The former roller 4b is arranged along the flow direction of the production line, and forms the metal plate 11 sent from the metal plate sending section 3 into a tubular metal sheath 11a. The former roller 4b is composed of, for example, a pair of rollers, and the metal plate 11 is formed into a tubular metal sheath 11a by gradually narrowing the interval between the rollers toward the downstream side of the production line. Can be molded.
The cable guide roller 4 c guides the cable 10 sent from the cable placement unit 2 to the roll forming unit 4. The cable guide roller 4c guides the cable 10 so that the cable 10 is accommodated in a metal sheath 11a formed in a tubular shape between the tape guide roller 4d and the left and right guide rollers 4e.
The tape guide roller 4d forms the metal plate 11 into the tubular metal sheath 11a while restricting the movement of the metal plate 11 formed into a tubular shape in the width direction.
The left and right guide rollers 4 e guide the cable 10 to the joint portion 5 while restricting movement in the width direction of the metal sheath 11 a in which the metal plate 11 is formed in a tubular shape.
The conveyance position of the metal plate 11 in the roll forming unit 4 is set to the same height as the position where the metal plate sending unit 3 sends out the metal plate 11.

  The joining part 5 joins the butted ends of the metal sheath 11a in which the metal plate 11 is formed into a tubular shape. The joining part 5 is comprised with the welding machine, for example. Here, since the butted end portion of the metal sheath 11a exists along the flow direction of the production line, the welding machine itself does not move, and the cable 10 covering the metal sheath 11a is placed in the flow direction of the production line. The butt end of the metal plate 11 can be welded only by feeding it along.

  The take-up part 6 is arranged on the downstream side of the production line of the joint part 5. The take-up unit 6 takes the cable 10 covered with the metal sheath 11 a welded at the butt end at the joint 5 and sends it to the surface processing unit 7.

FIG. 3 is a front view of the surface processed portion, and FIG. 4 is a front view of the roller of the surface processed portion.
The surface processing unit 7 performs processing for roughening the surface of the metal sheath 11 a covering the cable 10. As shown in FIGS. 3 and 4, the surface processing portion 7 includes a gantry 7 a and a pair of first processing rollers 7 b disposed on the gantry 7 a and disposed on the side of the metal sheath 11 a on which the cable 10 is disposed. , 7b and a pair of second processing rollers 7c, 7c disposed above and below the metal sheath 11a where the cable 10 is disposed.
The first processing rollers 7b and 7b are arranged so as to sandwich the metal sheath 11a side by side in the cross-sectional direction of the metal sheath 11a. Apply.
The second processing rollers 7c and 7c are arranged so as to sandwich the metal sheath 11a side by side in the longitudinal cross-sectional direction of the metal sheath 11a. Apply.
The first processing rollers 7b and 7b are arranged on the upstream side of the production line of the second processing rollers 7c and 7c. After the first processing rollers 7b and 7b perform processing to roughen the surfaces on both sides of the metal sheath 11a. The upper and lower surfaces of the metal sheath 11a can be roughened by the second processing rollers 7c and 7c, and the entire surface of the metal sheath 11a can be roughened.

Here, the process of roughening the surface refers to a process that increases the surface roughness of the metal sheath 11a, that is, increases the unevenness of the surface. Therefore, if the surface can be roughened by the processing rollers 7b and 7c, the state of the surface is not limited.
For example, as shown in FIG. 4, the processing rollers 7 b and 7 c are formed in a drum shape such that a side surface portion in contact with the metal sheath 11 a has an arc shape. Here, as shown in FIG. 4A, a plurality of protrusions 7t (about 0.5 mmφ) are formed along the outer peripheral surface on the side surface portions of the processing rollers 7b and 7c. Unevenness can be formed on the surface of the metal sheath 11a by biting into the surface of the sheath 11a. As shown in FIG. 4B, a file surface 7s (# 150 to # 600) may be formed on the side surface portions of the processing rollers 7b and 7c in place of the projection 7t.

FIG. 5 is a front view of the resin coating portion.
The resin coating portion 8 is disposed on the downstream side of the production line of the surface processing portion 7. The resin coating portion 8 covers the surface of the metal sheath 11a whose surface has been roughened by the surface processing portion 7 with an adhesive, thereby forming a resin layer.
The resin coating part 8 includes a head 8a, a resin supply part 8b, and an adhesive supply part 8c.
The head 8a is formed in a cylindrical shape, and a cable 10 having a metal sheath 11a with a rough surface is inserted.
The resin supply unit 8b communicates with the inside of the head 8a, and supplies resin to the roughened surface of the metal sheath 11a of the cable 10 flowing in the head 8a in the production line. The resin has flexibility in a solidified state, and the covered cable 12 can be made flexible by covering the cable 10. The resin is not particularly limited, but for example, polyethylene is preferably used.
The adhesive supply unit 8c communicates with the head 8a and supplies the adhesive to the roughened surface of the metal sheath 11a of the cable 10 flowing in the head 8a in the production line. The adhesive bonds the metal sheath 11a and the resin. The adhesive is not particularly limited as long as it adheres the metal sheath 11 a and the resin layer 14. For example, when polyethylene is used for the resin layer 14, it is preferable to use a polyethylene-based adhesive. In addition, a thermoplastic resin tape such as polyethylene can be wound into an adhesive. In addition to polyethylene, tar or the like can be used.
The resin supply unit 8b and the adhesive supply unit 8c are connected to the head 8a at the same position in the production line direction of the head 8a.

  The cable winding unit 9 is disposed on the most downstream side in the production line of the coated cable production apparatus 100. The cable winding unit 9 includes a drum 9a around which the coated cable 12 coated with resin is wound, and a support unit 9b that rotatably supports the drum 9a. When the drum 9a rotates, the cable 10 whose surface is coated with the resin by the resin coating portion 8 can be wound around the drum 9a.

<Manufacturing method of coated cable>
Next, the manufacturing method of the covered cable 12 using said manufacturing apparatus 100 is demonstrated.
The uncoated cable 10 is sent out from the cable sending unit 1 toward the roll forming unit 4, and the metal plate 11 is sent out from the metal plate sending unit 3 toward the roll forming unit 4.
The metal plate 11 is formed as a tubular metal sheath 11a by the former roller 4b in the roll forming portion 4, and the cable 10 guided by the cable placement portion 2 and the cable guide roller 4c is placed in the metal sheath 11a. .
The metal sheath 11 a in which the cable 10 is disposed is sent to the joint portion 5, and the butt end portion is welded at the joint portion 5. As a result, the cable 10 is built in the tubular metal sheath 11a.
The cable 10 covered with the metal sheath 11a is sent to the surface processing section 7, and processing (for example, forming irregularities) is performed on the entire peripheral surface of the metal sheath 11a by the processing rollers 7b and 7c. .
Next, the cable 10 is sent to the resin coating portion 8, the adhesive is supplied from the adhesive supply portion 8 c to the roughened surface of the metal sheath 11 a, and then the resin is supplied from the resin supply portion 8 b to remove the resin layer. Form.
The covered cable 12 on which the resin layer is formed is wound up by the cable winding unit 9, and when a predetermined amount is wound up, a series of manufacturing steps is completed.

FIG. 6 is a cross-sectional view of the coated cable 12 manufactured by the above manufacturing method.
The cable 10 delivered from the cable delivery unit 1 is configured by covering the conductor 10a with an insulating layer 10b.
The covered cable 12 covers the cable 10 with a metal sheath 11a, and the metal sheath 11a is covered with a resin layer 14 via an adhesive layer 13 formed of an adhesive. The adhesive forming the adhesive layer 13 enters the roughened surface of the metal sheath 11a and spreads uniformly on the surface of the metal sheath 11a, thereby firmly bonding the metal sheath 11a and the resin layer 14 together.

<Action, effect>
As described above, the cable 10 is covered with the metal sheath 11 a formed from the metal plate 11 in a series of manufacturing steps in which the cable 10 sent out from the cable sending unit 1 is wound around the cable winding unit 9 as the covered cable 12. Since the surface of the metal sheath 11a is roughened and an adhesive is supplied to form the resin layer 14, the metal sheath 11a is further formed in one step of covering the cable 10 with the metal sheath 11a. The resin layer 14 can be covered. Therefore, it is not necessary to perform the surface processing of the metal sheath 11a and the formation of the resin layer 14 in separate steps, and the production capacity of the covered cable 12 is not reduced.
Moreover, in forming the resin layer 14, the resin layer 14 can be firmly bonded to the surface of the metal sheath 11a by applying a process for roughening the surface to the outside of the metal sheath 11a.
Further, since a uniform adhesive force can be obtained in the longitudinal direction of the covered cable 12 between the metal sheath 11a and the resin layer 14, even if the coated cable 12 is subjected to mechanical stress, the metal sheath 11a and the resin layer are separated. Is less likely to occur, and the occurrence of problems such as buckling can be greatly suppressed when the cable is wound around the cable winding portion 9.
Further, the formation of the resin layer 14 can prevent the metal sheath 11a from being corroded, and can make the coated cable 12 flexible.

<Others>
The present invention is not limited to the above embodiment.
For example, the delivery position of the cable and the metal plate can be freely changed. In addition, the surface of the metal plate that becomes the outer surface of the metal sheath is applied at the initial stage of the production line, and then the metal plate is formed as a tubular metal sheath and the cable is arranged to join the butt ends. Next, a resin layer may be formed. Moreover, you may form a resin layer directly on the process surface of a metal sheath, without passing an adhesive agent.

DESCRIPTION OF SYMBOLS 1 Cable sending part 2 Cable arrangement | positioning part 3 Metal plate sending part 4 Roll forming part 5 Joining part 6 Take-off part 7 Surface processing part 7b First processing roller 7c Second processing roller 8 Resin coating part 9 Cable winding part 10 Cable 11 Metal Plate 11a Metal sheath 12 Coated cable 13 Adhesive 14 Resin layer 100 Coated cable manufacturing apparatus

Claims (4)

Forming a metal sheath by roll forming a metal plate;
Placing a cable within the metal sheath during molding;
Joining the butted ends of the metal plates in the metal sheath in which the cable is disposed;
Processing the surface of the metal sheath;
Are performed by the series of manufacturing steps of winding to the drum and the step, the prepared coating cables to form a resin layer on the machined surface of the metal sheath,
In the step of processing the surface of the metal sheath, a pair of first processing rollers arranged so as to sandwich the metal sheath in a cross-sectional direction of the metal sheath is brought into contact with the metal sheath being fed. A pair of second processing rollers disposed so as to sandwich the metal sheath along the longitudinal cross-sectional direction of the metal sheath, and to roughen the surface of the metal sheath. A method of manufacturing a coated cable, characterized by performing a process of bringing the metal sheath into contact with the surface of the metal sheath .   The method for producing a coated cable according to claim 1, further comprising a step of forming a resin layer on the processing surface of the metal sheath via an adhesive. A metal plate delivery section for delivering the metal plate;
A sheath forming part for forming a metal sheath by roll forming the metal plate sent out by the metal plate sending part;
A cable placement portion for placing a cable in the metal sheath being formed by the sheath forming portion;
A joint for joining the butted ends of the metal plates in the metal sheath where the cable is disposed; and
A surface processing portion for processing the surface of the metal sheath;
A resin supply unit for supplying resin to the surface of the metal sheath processed by the surface processing unit;
Equipped with a,
The surface processed portion is
A pair of first processing rollers that are arranged so as to sandwich the metal sheath side by side in the cross-sectional direction of the metal sheath, and each abuts against the metal sheath;
A pair of second processing rollers arranged so as to sandwich the metal sheath along the longitudinal cross-sectional direction of the metal sheath in which the cable is arranged, and each abutting the metal sheath;
Apparatus for manufacturing a sheathed cable, characterized in Rukoto equipped with.   The adhesive supply part which supplies the adhesive agent of the resin supplied from the said resin supply part, and the said metal sheath is provided on the surface of the said metal sheath processed by the said surface processing part. The manufacturing apparatus of the covering cable as described.

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