Method for manufacturing shielded insulated electric wire and method for manufacturing multi-core cable

Abstract

To provide a method for manufacturing shielded insulated wire and a method for manufacturing multicore cable in which the productivity of a shielded insulated wire and a multicore cable is increased.SOLUTION: A first process of wrapping a skin tape 33 around an insulated wire 30 and heating the skin tape 33 with a first halogen lamp 1 to fuse it to the insulated wire 30, a second process of winding the first shield wire 34 around the skin tape 33 after performing the first process, and a third process of wrapping a jacket tape 35 around the first shield wire 34 after performing the second process and heating the jacket tape 35 with a second halogen lamp 24 to fuse it to the first shield wire 34 are included.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a method for manufacturing a shielded insulated electric wire and a method for manufacturing a multi-core cable. [Background technology]

[0002] A probe cable is known as an example of a multi-core cable. The manufacturing process of this probe cable consists of multiple manufacturing steps, which include a tape fusion process and a shielding process. Specifically, the tape fusion process and the shielding process include a process of wrapping and fusing a skin tape around an insulator, a process of winding a cross-wound shield wire, and a process of wrapping and fusing a jacket tape. In the process of winding a tape such as a skin tape or a jacket tape, a cast-in heater is used to fuse the tape.

[0003] Here, Patent Document 1 describes an example of a multi-core cable and a manufacturing method thereof. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 8-241632 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the manufacturing process of the multi-core cable requires many steps and frequent movement between steps. Furthermore, the installation space of the production equipment is large. Therefore, the productivity of the manufacturing process of the multi-core cable is low.

[0006] An object of the present invention is to provide a method for producing a shielded insulated electric wire and a method for producing a multi-core cable, which can increase productivity. [Means for solving the problem]

[0007] A manufacturing method of a shielded insulated wire of the present invention is a manufacturing method of a shielded insulated wire comprising an insulated wire having a conductor covered with an insulator, a first insulating tape covering the insulated wire, a first shielded wire covering the first insulating tape, and a second insulating tape covering the first shielded wire, the manufacturing method including a first process of winding the first insulating tape around the insulated wire and heating the first insulating tape with a first near-infrared lamp to fuse it to the insulated wire, a second process of winding the first shielded wire around the first insulating tape after performing the first process, and a third process of winding the second insulating tape around the first shielded wire and heating the second insulating tape with a second near-infrared lamp to fuse it to the first shielded wire after performing the second process.

[0008] In one embodiment of the present invention, the first processing is performed in a first container provided with the first near-infrared lamp, and the third processing is performed in a second container provided with the second near-infrared lamp, and the temperatures in the first container and the second container are actually measured and controlled based on the results of this measurement.

[0009] In another aspect of the present invention, a blower is provided to send air into the first container and the second container, and the first container and the second container are cooled by the air sent from the blower.

[0010] In yet another embodiment of the present invention, the first processing, the second processing, and the third processing are carried out simultaneously.

[0011] In yet another aspect of the present invention, the method includes a fourth process of twisting the plurality of shielded insulated electric wires together, a fifth process of covering, after the fourth process, a plurality of collective electric wires each made up of the plurality of twisted shielded insulated electric wires with a second shield wire, and a sixth process of covering, after the fifth process, the second shield wire with a sheath. Effect of the Invention

[0012] According to the present invention, in the manufacture of a shielded insulated electric wire and a multi-core cable, the productivity of the shielded insulated electric wire and the multi-core cable can be increased. [Brief description of the drawings]

[0013] [Figure 1] 1 is a cross-sectional view showing an insulated electric wire used in the method for producing a shielded insulated electric wire of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view showing a wire structure in which the insulated wire of FIG. 1 is covered with a skin tape. [Diagram 3] 3 is a cross-sectional view showing the electric wire structure in which the electric wire structure in FIG. 2 is covered with a first shield wire. [Figure 4] 4 is a cross-sectional view showing a shielded insulated wire obtained by covering the wire structure of FIG. 3 with a jacket tape. [Diagram 5] 5 is a cross-sectional view showing an electric wire assembly in which a plurality of the shielded insulated electric wires of FIG. 4 are bundled and twisted together. [Figure 6] 6 is a cross-sectional view showing a wire in which a plurality of the electric wire assembly of FIG. 5 are bundled and covered with tape. [Figure 7] 7 is a cross-sectional view showing an electric wire structure in which the electric wire assembly of FIG. 6 is covered with a second shield wire. [Figure 8] 8 is a cross-sectional view showing a probe cable in which the electric wire assembly of FIG. 7 is covered with a sheath. [Figure 9] 1 is a schematic diagram showing a schematic configuration of a manufacturing apparatus for a shielded insulated electric wire used in a manufacturing method for a shielded insulated electric wire of the present invention. FIG. [Figure 10] 10 is a front view showing the configuration of a heater device provided in the shielded insulated electric wire manufacturing apparatus of FIG. 9. [Figure 11] FIG. 11 is a cross-sectional view taken along line AA in FIG. [Figure 12] FIG. 11 is a block diagram of a control system for the heater device in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an example of an embodiment of the method for producing a shielded insulated electric wire and a method for producing a multi-core cable of the present invention will be described. First, the structures of the shielded insulated electric wire and the multi-core cable of the present embodiment will be described with reference to Figs. 1 to 8.

[0015] 1 is a diagram showing the structure of an insulated wire 30 provided inside the shielded insulated wire. The insulated wire 30 has a structure in which a conductor 31 made of a stranded wire formed by twisting together a plurality of wires is covered with a foamed insulation layer 32. That is, the conductor 31 is disposed inside the foamed insulation layer 32. The foamed insulation layer 32 is made of, for example, a resin and contains air bubbles 28.

[0016] 2 shows an electric wire structure in which a foamed insulation layer 32 having a conductor 31 provided therein is covered with a skin tape (first insulating tape) 33. The skin tape 33 is an insulating tape, for example, a polyethylene-based tape. By wrapping the skin tape 33 and fusing it to the foamed insulation layer 32, the insulating ability of the foamed insulation layer 32 can be improved.

[0017] 3 shows an electric wire structure in which a plurality of first shield wires 34 are coated on a skin tape 33. The first shield wires 34 are, for example, copper wires, and the plurality of first shield wires 34 are wound on the skin tape 33 by a horizontal winding shielding method. The horizontal winding shielding method is a method of forming a shield by winding the first shield wire 34 around an insulated electric wire in a single row. The first shield wire 34 is then wound in a spiral shape around the insulated electric wire.

[0018] Fig. 4 shows an electric wire structure in which a first shielded wire 34 is covered with a jacket tape (second insulating tape) 35. The jacket tape 35 is an insulating tape. This jacket tape 35 is wound in two layers (jacket tape 35 and jacket tape 35a shown in Fig. 9) and fused to the first shielded wire 34, thereby ensuring insulation for the first shielded wire 34. The electric wire structure shown in Fig. 4 is a shielded insulated electric wire 36 of this embodiment.

[0019] 5 shows an electric wire structure in which a plurality of shielded insulated electric wires 36 are twisted together. A first electric wire assembly 37 is formed by bundling and twisting the plurality of shielded insulated electric wires 36 together.

[0020] 6 shows an electric wire structure in which a plurality of first assembled electric wires 37 are arranged around a spacer 29, and a tape 38 is wound around and fused to an electric wire material obtained by bundling the plurality of first assembled electric wires 37. In this way, a second assembled electric wire 39 is formed. However, the tape 38 does not necessarily have to be wound. The spacer 29 has the function of maintaining the outer shape of the cable round.

[0021] 7 shows an electric wire structure in which a plurality of first assembled electric wires 37 are arranged around an interposer 29, and a second shield wire 40 such as a copper wire is wound around an electric wire material obtained by bundling the plurality of first assembled electric wires 37, as an electric wire structure when the tape 38 shown in FIG. 6 is not wound around the wire material. A third assembled electric wire 41 is formed by winding the second shield wire 40 around the electric wire material obtained by bundling the plurality of first assembled electric wires 37 by a braiding method. The braiding method is a method of forming a shield by winding the second shield wire 40 around the electric wire material in a braided manner while crossing the wire material.

[0022] Fig. 8 shows an electric wire structure in which a second shield wire 40 wound by the above-mentioned braiding method is covered with a sheath 42. The electric wire structure shown in Fig. 8 is a probe cable (multi-core cable) 43 of this embodiment.

[0023] Next, a description will be given of a manufacturing apparatus 50 for a shielded insulated electric wire and a manufacturing method for a shielded insulated electric wire 36 according to this embodiment shown in Fig. 9. The manufacturing apparatus 50 for a shielded insulated electric wire is a manufacturing apparatus that successively carries out a first process of wrapping a skin tape 33 around the insulated electric wire 30 sent out from a sending machine 54 and heat fusing the skin tape 33 with a near-infrared lamp (concentrated heater), a second process of wrapping a first shield wire 34 around the insulated electric wire 30 with the skin tape 33 fused thereto in the first process, and a third process of wrapping a jacket tape 35, 35a around the insulated electric wire 30 with the first shield wire 34 wrapped around it in the second process and heat fusing the jacket tape 35, 35a with the near-infrared lamp. That is, the manufacturing apparatus 50 for a shielded insulated electric wire includes a first processing section 51 where the first processing is performed, a second processing section 52 where the second processing is performed, and a third processing section 53 where the third processing is performed, and is a manufacturing apparatus that performs the first processing, the second processing, and the third processing on the insulated electric wire 30 without winding the insulated electric wire 30 from the start of the first processing to the end of the third processing. In other words, the manufacturing apparatus 50 for a shielded insulated electric wire is an integrated device that continuously performs the first processing, the second processing, and the third processing on the insulated electric wire 30 sent out from a sending machine 54. The electric wire structure that has been subjected to the third processing in the third processing section 53 is the shielded insulated electric wire 36 of this embodiment shown in FIG. 4, and the manufactured shielded insulated electric wire 36 is wound by a winding machine 55. That is, in the manufacturing method of the shielded insulated electric wire 36 of this embodiment using the manufacturing apparatus 50 for a shielded insulated electric wire, the insulated electric wire 30 sent out from the feed machine 54 is not wound up until the first processing, the second processing, and the third processing are performed, and is wound up by the winding machine 55 after the third processing is completed. Therefore, in the manufacturing method using the manufacturing apparatus 50 for a shielded insulated electric wire, the insulated electric wire 30 sent out from the feed machine 54 is in a connected in-line state until it is finally wound up by the winding machine 55.

[0024] Furthermore, in the manufacturing method of the shielded insulated electric wire manufacturing apparatus 50, the first processing, the second processing, and the third processing can be simultaneously performed on the insulated electric wire 30 in the first processing section 51, the second processing section 52, and the third processing section 53, respectively.

[0025] In the manufacturing process using the shielded insulated electric wire manufacturing apparatus 50, the side where the pay-off machine 54 is installed is referred to as the upstream side, and the side where the winding machine 55 is arranged is referred to as the downstream side. Therefore, the insulated electric wire 30 sent out from the pay-off machine 54 advances toward the winding machine 55 on the downstream side, and the first process, the second process, and the third process are sequentially performed on the insulated electric wire 30. Note that the insulated electric wire 30 sent out from the pay-off machine 54 advances while rotating around the traveling axis.

[0026] The first processing section 51 of the shielded insulated electric wire manufacturing apparatus 50 is provided with a bobbin 51a around which the skin tape 33 to be supplied to the insulated electric wire 30 is wound, a flyer 51b, and a heater device 21. Note that a center taping method is adopted as a taping method for the skin tape 33 in the first processing section 51. Accordingly, the insulated electric wire 30 passes through the center of the bobbin 51a, and the skin tape 33 wound around the bobbin 51a is supplied to the rotating insulated electric wire 30 via the flyer 51b, whereby the skin tape 33 is spirally wound around the insulated electric wire 30.

[0027] Moreover, the heater device 21 includes a heater storage box 10 which is a first container, a first halogen lamp (first near-infrared lamp) 1 provided in the heater storage box 10, and a blower 7 which sends air into the heater storage box 10. The skin tape 33 is fused to the insulated wire 30 in the heater storage box 10. That is, the skin tape 33 is heated by the first halogen lamp 1, and the skin tape 33 is fused to the insulated wire 30.

[0028] Further, a torsion catcher 56 is disposed downstream of the bobbin 51a. The torsion catcher 56 adjusts the degree of twist of the skin tape 33 by matching it with the number of rotations of the insulated wire 30 at a position downstream of the bobbin 51a.

[0029] The second processing section 52 of the shielded insulated electric wire manufacturing apparatus 50 is provided with a bobbin arrangement plate 52a that supports a plurality of horizontally oriented bobbins 52b around which the first shield wire 34 is wound, and a guide plate 52c that guides the first shield wire 34 supplied from the bobbins 52b arranged on the bobbin arrangement plate 52a to the insulated electric wire 30 to which the skin tape 33 is fused. The first shield wire 34 is spirally wound around the insulated electric wire in a single row by a horizontal winding shielding method.

[0030] A torsion catcher 57 is disposed upstream of the bobbin arrangement plate 52a and the guide plate 52c, and a torsion catcher 58 is disposed downstream of the bobbin arrangement plate 52a and the guide plate 52c. The torsion catchers 57, 58 adjust the degree of twist of the first shield wire 34 by matching it with the number of rotations of the insulated wire 30 at positions upstream and downstream of the bobbin arrangement plate 52a and the guide plate 52c.

[0031] The third processing section 53 of the shielded insulated electric wire manufacturing apparatus 50 is provided with a bobbin 52d and a flyer 52e wound with a jacket tape 35a to be supplied to the insulated electric wire wound with the first shield wire 34, a fixed bobbin 53a wound with the jacket tape 35, and a heater device 27.

[0032] The jacket tape 35a is taped by a center taping method, in which the insulated electric wire passes through the center of the bobbin 52d, and the jacket tape 35a wound around the bobbin 52d is supplied to the rotating insulated electric wire via the flyer 52e, so that the jacket tape 35a is wound around the insulated electric wire in a spiral shape.

[0033] On the other hand, the jacket tape 35 is taped by a horizontal winding taping method in which the jacket tape 35 is wound around the insulated electric wire wound with the jacket tape 35a in a single row, and the jacket tape 35 is wound around the insulated electric wire in a spiral shape.

[0034] The heater device 27 also includes a heater storage box 26 which is a second container, a second halogen lamp (second near-infrared lamp) 24 provided in the heater storage box 26, and a blower 25 which sends air into the heater storage box 26. The jacket tapes 35, 35a are fused to the insulated wire in the heater storage box 26. That is, the jacket tapes 35, 35a are heated by the second halogen lamp 24, and the jacket tapes 35, 35a are fused to the insulated wire.

[0035] A torsion catcher 59 is disposed downstream of the bobbin 52d. The torsion catcher 59 adjusts the degree of twist of the jacket tape 35a by matching the rotation speed of the insulated wire at a position downstream of the bobbin 52d.

[0036] Next, a detailed description will be given of the heater device 21. Here, the heater device 21 will be described, but a heater device 27 shown in FIG.

[0037] Heater device 21 shown in Fig. 10 includes heater storage box 10 having first halogen lamp 1 therein for heating insulated electric wire 4 (insulated electric wire 30 shown in Fig. 9). That is, insulated electric wire 4 passes through heater storage box 10, in which insulated electric wire 4 is heated by first halogen lamp 1, and fusion of skin tape 33 shown in Fig. 9 is performed. Insulated electric wire 4 is disposed inside cylindrical quartz tube 5 provided in heater storage box 10, and insulated electric wire 4 travels inside cylindrical quartz tube 5.

[0038] The heater device 21 also includes a blower 7 that sends air into the heater housing box 10. Therefore, in the heater device 21, the temperature of the atmosphere in the heater housing box 10 is controlled by a combination of heating by the first halogen lamp 1 and cooling by the blower 7.

[0039] As shown in FIG. 11, the heater storage box 10 is formed of a heat insulating material 3, and the atmospheric temperature inside the heater storage box 10 is maintained.

[0040] Three first halogen lamps 1 are provided around the quartz tube 5 in the axial direction so as to surround the quartz tube 5. Each of the three first halogen lamps 1 is supported by a heater bracket 9, and each heater bracket 9 is attached to the inner wall of a heater storage box 10. Three reflectors 6 are provided around the quartz tube 5 in the axial direction so as to surround the gaps around each of the three first halogen lamps 1. This makes it possible to increase the temperature only in the vicinity of the insulated wire 4 within the heater storage box 10.

[0041] Further, in the heater housing box 10, a thermocouple 8 for measuring the temperature inside the heater housing box 10, a protective tube 2, etc. are attached.

[0042] As shown in Fig. 12, cooling water pipes 12 and 14 are connected to the first halogen lamp 1 in Fig. 11, and cooling water is constantly flowing through each of the first halogen lamps 1. The cooling water pipes 12 and 14 are connected to a chiller 15, and the chiller 15 circulates the cooling water through the cooling water pipes 12 and 14. In the control system shown in Fig. 12, the cooling water pipe 14 is a pipe that supplies the cooling water, and the cooling water pipe 12 is a pipe that returns the cooling water. Therefore, a flow meter 11 is attached to the cooling water pipe 12, and an electromagnetic valve 13 is attached to the cooling water pipe 14, and the flow rate of the cooling water supplied to the cooling water pipe 14 is adjusted by the electromagnetic valve 13. The chiller 15 is a device that controls the temperature of the insulated electric wire 4 by circulating the cooling water.

[0043] Each first halogen lamp 1 is connected to the PLC 18 via a lamp controller 19. The blower 7 is connected to the PLC 18 via an INV 20 which is a blower inverter. The thermocouple 8, chiller 15, flow meter 11 and solenoid valve 13 are also connected to the PLC 18. The PLC 18 is a controller for controlling the sequence of heating by the first halogen lamp 1, cooling by the blower 7 and circulation of the cooling water. The PLC 18 is connected to the GP 17 which is an operation panel and the line control panel 16.

[0044] As described above, in the manufacture of the shielded insulated electric wire of this embodiment, in the heater device 21, the atmospheric temperature in the heater housing box 10 during processing can be actually measured by the thermocouple 8, and based on the actual measurement result, the atmospheric temperature in the heater housing box 10 during processing can be controlled by using the first halogen lamp 1 in combination with the blower 7. The same applies to the heater device 27.

[0045] In the manufacturing method of the shielded insulated electric wire 36 of this embodiment, the heater devices 21, 27 employing near-infrared lamps (first halogen lamp 1, second halogen lamp 24) as high-output concentrating heaters are provided, and this makes it possible to perform tape fusion by the heater devices 21, 27. Then, in the manufacturing apparatus 50 for the shielded insulated electric wire in which the heater devices 21, 27 are provided, the process of winding the first shield wire 34 is performed between the heater devices 21 and 27. As a result, in the manufacturing method of the shielded insulated electric wire 36, the three processes consisting of the first process of winding and heat-fusing the skin tape 33, the second process of winding the first shield wire 34, and the third process of winding and heat-fusing the jacket tapes 35, 35a can be performed continuously and simultaneously in one process.

[0046] As a result, it is possible to reduce the number of manufacturing steps and the frequency of movement between steps in the manufacture of the shielded insulated electric wire 36. In addition, the heater length can be shortened by using near-infrared lamps, so the installation space for the equipment can be narrowed, and the productivity of the shielded insulated electric wire 36 can be improved.

[0047] In addition, if the first, second and third processes are carried out as a single process, the overall length of the line will become longer, which may induce irregularities in the shield winding and tape winding due to uneven expansion and contraction or twisting of the insulated wire 30, raising concerns about poor tape fusion.

[0048] Therefore, in the manufacturing method for the shielded insulated wire 36 of the present embodiment, the heater length can be shortened by employing a near-infrared lamp, and high-temperature fusion is possible, so that irregularities in the winding of the shield or tape caused by uneven expansion / contraction or twisting of the insulated wire can be suppressed.

[0049] In addition, when the shield winding process (second process) and the tape fusion process (first and third processes) are to be performed simultaneously, the insulated electric wire must be rotated while the tape is wound around it and fusion is performed in that state. Therefore, when the shield winding process and the tape fusion process are performed simultaneously, it is necessary to perform the tape fusion at a higher ambient temperature than when the shield winding process and the tape fusion process are performed in separate steps. In the manufacturing method of the shielded insulated electric wire 36 of this embodiment, a near-infrared lamp is used, which has a short wavelength and a high temperature, so that the tape fusion can be performed by raising the ambient temperature of the insulated electric wire. As a result, in the manufacturing method of the shielded insulated electric wire 36 using the manufacturing apparatus 50 for the shielded insulated electric wire, the shield winding process (second process) and the tape fusion process (first and third processes) can be performed simultaneously.

[0050] In addition, by using near-infrared lamps, the temperature rise for tape fusion can be performed early by synchronizing with the start-up of the line. Furthermore, by using near-infrared lamps, the temperature of the tape fusion part can be stabilized by controlling the temperature of the near-infrared lamp while actually measuring the temperature in the vicinity of the insulated electric wire 4 (insulated electric wire 30) in the heater storage boxes 10 and 26, and the occurrence of defective tape fusion can be reduced.

[0051] Also, by providing blowers 7, 25 for cooling the inside of the heater storage boxes 10, 26 and a chiller control mechanism for controlling the blowers 7, 25 and controlling the temperature of the near-infrared lamps themselves by cooling water, it is possible to perform cooling control for the inside of the heater storage boxes 10, 26 and rapid cooling control for the near-infrared lamps themselves. Furthermore, the chiller control mechanism can quickly lower the ambient temperature of the insulated wire 4 (insulated wire 30), thereby reducing the occurrence of tape burn and poor fusion caused by an excessive rise in the tape temperature when the feed speed of the insulated wire 4 is decelerating or stopped.

[0052] In addition, the shielded insulated electric wire manufacturing apparatus 50 employs a single twist type pay-out machine 54 and a winding machine 55 for rotating the insulated electric wire, and furthermore, torsion catchers 57, 58 are arranged upstream and downstream of the bobbin arrangement plate 52a and the guide plate 52c where the horizontal winding type shielding is performed, and torsion catchers 56, 59 are arranged downstream of the bobbins 51a, 52d where the central taping is performed. This makes it possible to suppress twisting of the long insulated electric wire 30. Furthermore, it is possible to improve the stability of the twisting pitch of the insulated electric wire, and also to reduce disturbances in the shield winding pitch. This makes it possible to reduce disturbances in the winding of the top winding tape.

[0053] In addition, by combining the central taping and the vertical tape attachment method in the taping of the jacket tapes 35 and 35a, the taping speed can be increased and the winding pitch can be changed. Furthermore, the taping structure can be simplified and made smaller, and the overall line length can be shortened. As a result, it is possible to reduce disturbances in the winding of the shield and the winding of the tape caused by the expansion and contraction of the insulated wire and uneven twisting.

[0054] Next, a method for manufacturing a probe cable (multi-core cable) 43 according to this embodiment will be described. The method for manufacturing the probe cable 43 uses a shielded insulated electric wire 36 manufactured by the method for manufacturing the shielded insulated electric wire 36. First, as shown in FIG. 5, a fourth process is performed in which a first electric wire assembly 37 is formed by twisting together a plurality of shielded insulated electric wires 36. After the fourth process is performed, a fifth process is performed in which a third electric wire assembly 41 is formed by covering a plurality of first electric wire assembly 37, each of which is made up of a plurality of twisted shielded insulated electric wires 36, with a second shield wire 40 as shown in FIG. 7. After the fifth process is performed, a sixth process is performed in which a probe cable 43 is manufactured by covering the second shield wire 40 with a sheath 42 as shown in FIG. 8.

[0055] As described above, the probe cable 43 of this embodiment can be manufactured by carrying out the fourth, fifth and sixth processes using the shielded insulated electric wire 36 manufactured by the manufacturing method for the shielded insulated electric wire 36. Therefore, in the manufacturing method for the probe cable 43 of this embodiment, as in the manufacturing method for the shielded insulated electric wire 36, the number of manufacturing steps can be reduced by employing near-infrared lamps, and the frequency of movement between steps can be reduced. Furthermore, since the heater length can be shortened by employing near-infrared lamps, the installation space for the equipment can be narrowed, and the productivity of the probe cable 43 can be increased.

[0056] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit and scope of the present invention. For example, the process of winding tape 38 around a plurality of first electric wire assembly 37 (see FIG. 6 ) each made up of a plurality of twisted shielded insulated electric wires 36 to form a second electric wire assembly 39 does not necessarily have to be performed. [Explanation of symbols]

[0057] 1. First halogen lamp (first near-infrared lamp) 2 Protection tube 3. Insulation 4. Insulated Wire 5 Quartz tube 6 Reflector 7 Blower 8 Thermocouples 9 Heater bracket 10 Heater storage box (first container) 11 Flowmeter 12 Cooling water piping 13 Solenoid valve 14 Cooling water piping 15 Chiller 16 Line control panel 17 GP 18 PLC 19 Lamp Controller 20 INV 21 Heater device 24 Second halogen lamp (second near-infrared lamp) 25 Blois 26 Heater storage box (second container) 27 Heater device 28 Bubbles 29 Intervention 30 Insulated Wire 31 Conductor 32 Foam insulation layer 33 Skin tape (first insulating tape) 34 First shield wire 35,35a Jacket tape (second insulating tape) 36 Shielded insulated wire 37 1st collection wire 38 Tape 39 2nd collection wire 40 Second shield wire 41 3rd collection wire 42 Sheath 43 Probe cable (multi-core cable) 50 Manufacturing equipment for shielded insulated electric wire 51 1st processing section 51a Bobbin 51b Flyer 52 2nd processing section 52a Bobbin placement plate 52b Bobbin 52c Guide plate 52d Bobbin 52e Flyer 53 3rd processing section 54 Delivery machine 55 Winder 56,57,58,59 Torsion Catcher

Claims

1. A method for manufacturing a shielded insulated electric wire comprising: an insulated electric wire in which a conductor is covered with an insulator; a first insulating tape covering the insulated electric wire; a first shielded wire covering the first insulating tape; and a second insulating tape covering the first shielded wire, a first process of winding the first insulating tape around the insulated wire and fusing the first insulating tape to the insulated wire by heating the first insulating tape with a first near-infrared lamp through a first quartz tube; a second process of winding the first shield wire around the first insulating tape after the first process is performed; a third process of winding the second insulating tape around the first shielded wire after the second process and heating the second insulating tape with a second near-infrared lamp through a second quartz tube to fuse the second insulating tape to the first shielded wire; having In the first processing, a first near-infrared lamp and a first reflector are provided around the first quartz tube in an axial direction so as to surround the first quartz tube; In the second processing, a second near-infrared lamp and a second reflector are provided around the second quartz tube in the axial direction so as to surround the second quartz tube. A method for manufacturing a shielded insulated electric wire.

2. The method for producing a shielded insulated electric wire according to claim 1, The first processing is performed in a first container provided with the first near-infrared lamp; The third processing is performed in a second container provided with the second near-infrared lamp; the temperatures in the first container and the second container are actually measured, and the temperatures in the first container and the second container are controlled based on the actual measurement results.

3. The method for producing a shielded insulated electric wire according to claim 2, a blower is provided to blow air into the first container and the second container; The inside of the first container and the inside of the second container are cooled by the air sent from the blower.

4. The method for producing a shielded insulated electric wire according to claim 1, 2 or 3, The method for manufacturing a shielded insulated electric wire includes simultaneously carrying out the first processing, the second processing, and the third processing.

5. 5. A method for producing a multi-core cable including a plurality of shielded insulated electric wires produced by the method for producing a shielded insulated electric wire according to claim 1, 2, 3 or 4, A fourth process of twisting the plurality of shielded insulated electric wires together; a fifth process of covering a plurality of stranded electric wires each including the plurality of twisted shielded insulated electric wires with a second shield wire after the fourth process is performed; a sixth process of covering the second shielded wire with a sheath after the fifth process is performed; and A method for manufacturing a multi-core cable comprising the steps of:

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