JP7163340B2 - cables and harnesses - Google Patents

Description

The present invention relates to cables and harnesses.

Conventionally, a cable is known in which a sheath is provided around a plurality of electric wires. In such a cable, a lubricant such as talc powder is applied around the wires in order to make it easier to separate the wires from the sheath. There was a problem that the workability was reduced due to scattering in the air.

Therefore, a cable has been proposed in which a tape member is spirally wound around a plurality of electric wires and a sheath is provided around the tape member (see, for example, Patent Document 1).

By providing a tape member around the wire, the wire can be easily peeled off from the sheath without applying a lubricant to the wire.

JP 2014-220043 A

By the way, the present inventors have found that when the outer circumference of the tape member is covered with a sheath made of urethane-based resin, the sheath may foam and voids may occur in the sheath.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cable and a harness capable of suppressing occurrence of voids in a sheath made of urethane-based resin.

In order to solve the above problems, the present invention provides a plurality of electric wires, a tape member wound around the plurality of electric wires, and an outer skin made of urethane resin coated on the outer periphery of the tape member. and wherein the tape member is made of a nonwoven fabric made of polyester, polypropylene, aramid fiber, nylon, acrylic fiber, or glass fiber, and the air permeability of the nonwoven fabric is 30 cc/cm ² /sec or more. I will provide a.

Moreover, in order to solve the above problems, the present invention provides a harness including the cable and a connector attached to an end of the electric wire.

ADVANTAGE OF THE INVENTION According to this invention, the cable and harness which can suppress that a void will generate|occur|produce in the sheath which consists of urethane-type resins can be provided.

1 is a block diagram showing a configuration of a vehicle using a cable according to one embodiment of the invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the cable which concerns on one embodiment of this invention, (a) is a cross-sectional view, (b) is the broken cross-sectional view which represented the outer skin and the tape member in the cross section. 1 is a schematic configuration diagram of a harness according to an embodiment of the invention; FIG. FIG. 10 is a cross-sectional view of a cable according to one modification of the invention; FIG. 10 is a cross-sectional view of a cable according to one modification of the invention;

[Embodiment]
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the accompanying drawings.

(Description of vehicles to which the cable is applied)
FIG. 1 is a block diagram showing the configuration of a vehicle using a cable according to this embodiment.

As shown in FIG. 1, a vehicle 100 is provided with an electric parking brake (hereinafter referred to as EPB) 101 as an electric braking device.

The EPB 101 includes an EPB electric motor 101a and an EPB control section 101b.

The EPB electric motor 101 a is a wheel-side device mounted on a wheel 102 of the vehicle 100 . The EPB control unit 101b is mounted on an ECU (electronic control unit) 103, which is a device on the vehicle body side of the vehicle 100. As shown in FIG. Note that the EPB control unit 101b may be mounted in a control unit other than the ECU 103, or may be mounted in a dedicated hardware unit.

Although not shown, the EPB electric motor 101a is provided with a piston to which a brake pad is attached. It is configured to press against the disk rotor of the wheel to generate a braking force. A pair of first electric wires 5 are connected to the EPB electric motor 101a as power lines for supplying drive current to the EPB electric motor 101a.

When the parking brake activation switch 101c is turned on from the off state while the vehicle 100 is stopped, the EPB control unit 101b outputs drive current to the EPB electric motor 101a for a predetermined time (for example, one second). , the brake pad is pressed against the disc rotor of the wheel 102 to generate a braking force on the wheel 102 . Further, the EPB control unit 101b outputs a drive current to the EPB electric motor 101a when the parking brake operation switch 101c is turned off from the ON state or when the accelerator pedal is depressed. It is configured to move the pads away from the disc rotor of the wheel to release the braking force on the wheel 102 . In other words, the operating state of the EPB 101 is maintained after the parking brake activation switch 101c is turned on until the parking brake activation switch 101c is turned off or the accelerator pedal is depressed. The parking brake activation switch 101c may be a lever type switch or a pedal type switch.

In addition, the vehicle 100 is equipped with an ABS device 104 . The ABS device 104 includes an ABS sensor 104a and an ABS controller 104b.

The ABS sensor 104 a is a rotation speed detection sensor that detects the rotation speed of the wheel 102 during running, and is mounted on the wheel 102 . The ABS control unit 104b controls the braking device based on the output of the ABS sensor 104a and controls the braking force of the wheels 102 so that the wheels 102 are not locked at the time of sudden stop, and is mounted on the ECU 103. A pair of second electric wires 6 are connected to the ABS sensor 104a as signal lines.

The cable 1 according to the present embodiment is obtained by collectively covering the first electric wire 5 and the second electric wire 6 with the outer sheath 4 (see FIG. 2). The cable 1 extending from the wheel 102 side is connected to the electric wire group 107 in the relay box 106 provided in the vehicle body 105, and is connected to the ECU 103 and a battery (not shown) via the electric wire group 107.

Although only one wheel 102 is shown in FIG. 1 for simplification of the drawing, the EPB electric motor 101a and the ABS sensor 104a may be mounted on each wheel 102 of the vehicle 100. For example, It may be mounted only on the front wheels of the vehicle 100 or only on the rear wheels.

(Description of cable 1)
FIG. 2 is a cross-sectional view of the cable 1 according to this embodiment.

As shown in FIG. 2, the cable 1 includes a plurality of electric wires 2, a tape member 3 made of nonwoven fabric wrapped around the plurality of electric wires 2, and a urethane-based resin coated on the outer periphery of the tape member 3. and an outer skin 4.

In the cable 1, a plurality of electric wires 2 are twisted together, and a tape member 3 is helically wound around the plurality of electric wires 2. - 特許庁

In the present embodiment, the plurality of electric wires 2 includes a pair of first electric wires 5 as power wires for supplying drive current to electric motors 101a for EPBs 101 mounted on wheels 102 of vehicle 100.

In the present embodiment, the plurality of wires 2 are multicore wires 8 in which a pair of second wires 6 as signal wires for the ABS sensor 104a mounted on the wheel 102 are collectively covered with an inner sheath 7. contains.

Here, the case where the cable 1 has a total of three electric wires 2 of two first electric wires 5 and one multicore electric wire 8 will be described, but the number of electric wires 2 is not limited to this. For example, when a large number of electric wires 2 are provided, a multi-strand structure may be employed in which an outer layer portion is formed by spirally winding a plurality of electric wires 2 around an inner layer portion in which a plurality of electric wires 2 are twisted.

The first electric wire 5 is configured by coating a first insulator 52 made of an insulating resin such as crosslinked polyethylene around a first conductor 51 made of twisted strands of good conductivity such as copper.

As a wire used for the first conductor 51, a wire having a diameter of 0.05 mm or more and 0.30 mm or less can be used. If a wire with a diameter of less than 0.05 mm is used, sufficient mechanical strength may not be obtained and the bending resistance may be reduced. may decrease.

The outer diameter of the first conductor 51 of the first wire 5 and the thickness of the first insulator 52 may be appropriately set according to the magnitude of the required drive current. In the present embodiment, the outer diameter of the first conductor 51 is set to 1.5 mm or more and 3.0 mm or less considering that the first electric wire 5 is a power line that supplies a drive current to the electric motor 101a for the EPB 101. In addition, the outer diameter of the first electric wire 5 is set to 2.0 mm or more and 4.0 mm or less.

The second electric wire 6 is an insulation structure in which a second conductor 61 made of twisted strands of good conductivity such as copper is covered with a second insulator 62 made of an insulating resin such as cross-linked polyethylene. It's an electric wire. As the wire used for the second conductor 61 , a wire having a diameter of 0.05 mm or more and 0.30 mm or less can be used like the first conductor 51 .

The pair of second electric wires 6 are covered with an inner sheath 7 collectively while being in contact with each other and twisted together. A multicore electric wire 8 is obtained by collectively covering a pair of second electric wires 6 with an inner sheath 7 . The inner sheath 7 is made of, for example, urethane resin. In this embodiment, a case of using a two-core multicore electric wire 8 will be described, but the number of cores of the multicore electric wire 8 is not limited to this. Also, the electric wire 2 may have a plurality of multicore electric wires 8 .

The outer diameter of the second electric wire 6 is smaller than the outer diameter of the first electric wire 5 . In this embodiment, since the multi-core electric wire 8 in which the two second electric wires 6 are covered with the inner sheath 7 and the pair of the first electric wires 2 are twisted together, the outer diameter of the cable 1 can be approximated to a circular shape. Therefore, it can be said that it is desirable to use a second electric wire 6 having an outer diameter approximately half that of the first electric wire 5 . Specifically, the second electric wire 6 may have an outer diameter of 1.0 mm or more and 1.8 mm or less, and the second conductor 61 may have an outer diameter of 0.4 mm or more and 1.0 mm or less.

In the cable 1, two first electric wires 5 and one multicore electric wire 8 are twisted together, and the tape member 3 is spirally wound around them. Two first electric wires 5 and one multi-core electric wire 8 are twisted together while being in contact with each other. A part of one multicore electric wire 8 is arranged in the inner valley portion between the two first electric wires 5 .

Note that the EPB 101 basically supplies drive current to the electric motor 101a when the vehicle is stopped. On the other hand, the ABS sensor 104a is used when the vehicle is running, and the ABS sensor 104a is not used when the first electric wire 5 is supplied with the drive current. Therefore, in the present embodiment, the shield conductor provided around the multicore electric wire 8 is omitted. By omitting the shield conductor, it is possible to reduce the outer diameter of the cable 1 compared with the case where the shield conductor is provided, and it is also possible to reduce the number of parts and suppress the cost.

Also, here, the case where the first electric wire 5 supplies the drive current to the electric motor 101a for EPB is described, but the first electric wire 5 is, for example, an electromechanical brake (hereinafter referred to as EMB ) may be used to supply drive current to an electric motor. In this case, a current flows through the first electric wire 5 even while the vehicle 100 is running. It can be said that it is desirable to provide a shield conductor around the Moreover, it is also possible to provide a shield conductor on the outer peripheral side of each conductor of the pair of first electric wires 5 so that each of the pair of first electric wires 5 is a shield electric wire.

Furthermore, although the case where the second electric wire 6 is a signal line for the ABS sensor 104a is described here, the second electric wire 6 is used to detect other sensors provided on the wheel 102, such as a temperature sensor and tire air pressure. It may be a signal line used for an air pressure sensor or the like, a damper line used for controlling the vibration damping device of the vehicle 100, or a signal line for EMB control (such as a CAN cable). may Even if the first electric wire 5 supplies drive current to the electric motor 101a for EPB, if the second electric wire 6 is used while the vehicle 100 is stopped, it is necessary to suppress malfunction due to noise. In addition, it can be said that it is desirable to provide a shield conductor around the multi-core electric wire 8 .

The outer diameter of an assembly 9 obtained by twisting three electric wires 2 (two first electric wires 5 and one multicore electric wire 8) is, for example, about 5 mm to 9 mm. The twist pitch of the electric wires 2 in the assembly 9 should be set in consideration of the outer diameter of the assembly 9 to the extent that unnecessary load is not applied to the electric wires 2 . Although the twist pitch of the wires 2 in the assembly 9 is set to about 50 mm here, the twist pitch of the wires 2 is not limited to this. The twist pitch of the wires 2 is the interval along the longitudinal direction of the assembly 9 at which arbitrary wires 2 (the first wires 5 or the multicore wires 8) are at the same position in the circumferential direction of the assembly 9.

A tape member 3 is spirally wound around the assembly 9, and the tape member 3 contacts all the electric wires (the pair of first electric wires 5 and the multicore electric wire 8) covered by the tape member 3. ing. The tape member 3 is interposed between the assembly 9 and the outer covering 4, and serves to reduce friction between the electric wires 2 and the outer covering 4 when bent, and to facilitate the peeling of the electric wires 2 from the outer covering 4 during terminal processing. Fulfill. That is, by providing the tape member 3, the friction between the wire 2 and the outer cover 4 is reduced without using a lubricant such as talc powder as in the conventional art. Flexibility can be improved, and workability during terminal processing can be improved.

As the tape member 3 , it is desirable to use a tape member 3 that easily slides on the first insulator 52 of the first wire 5 and the inner sheath 7 (having a small coefficient of friction). More specifically, as the tape member 3, the friction coefficient (static friction coefficient) between the tape member 3 and the first insulator 52 and the inner sheath 7 is the same as the outer skin 4 and the first insulator when the tape member 3 is not provided. A member having a smaller coefficient of friction (static coefficient of friction) between the body 52 and the inner sheath 7 may be used. In this embodiment, the tape member 3 is made of nonwoven fabric. The details of the nonwoven fabric used for the tape member 3 will be described later.

The tape member 3 is spirally wound around the assembly 9 so that the width direction (the direction perpendicular to the longitudinal direction and thickness direction of the tape member 3) partially overlaps. The overlapping width of the tape members 3 is, for example, 1/4 or more and 1/2 or less of the width of the tape members 3 . In the present embodiment, the overlapping portions of the tape members 3 are not adhered with an adhesive or the like.

The width of the tape member 3 may be set to the extent that the tape member 3 does not wrinkle when the tape member 3 is wound, and the narrower the tape member 3, the smaller the outer diameter of the aggregate 9 as a whole. is desirable. Specifically, when the aggregate 9 has an outer diameter of 5 mm to 9 mm, the width of the tape member 3 may be about 20 mm to 50 mm.

The winding pitch of the tape member 3, that is, the interval along the longitudinal direction where the tape members 3 are at the same position in the circumferential direction (for example, the interval between the ends in the width direction) is adjusted by the width of the tape member 3 and the overlapping width. is possible. If the width of the tape member 3 is increased and the winding pitch is increased, the tape member 3 becomes close to being vertically attached, and the flexibility of the cable 1 is lost, making it difficult to bend. Therefore, it is desirable that the winding pitch of the tape member 3 is 50 mm or less.

A skin 4 made of urethane-based resin is provided around the tape member 3 . In the present embodiment, the first electric wire 5 supplies the drive current to the EPB electric motor 101a, and since the drive current flows through the first electric wire 5 for a relatively short time, the shield conductor is omitted. A shield conductor may be provided between the tape member 3 and the outer cover 4 or on the outer circumference of the outer cover 4 depending on the application of the first electric wire 5 .

Now, in the cable 1 according to this embodiment, the tape member 3 is made of nonwoven fabric made of polyester, polypropylene, aramid fiber, nylon, acrylic fiber, or glass fiber.

By constructing the tape member 3 with a non-woven fabric made of polyester, polypropylene, aramid fiber, nylon, acrylic fiber, or glass fiber, the tape member 3 becomes less likely to absorb moisture, and the heat generated when the outer skin 4 is coated causes the tape member 3 to detach. It becomes possible to suppress the water from evaporating and the outer skin 4 from foaming.

In addition, in the present embodiment, as the nonwoven fabric used for the tape member 3, one having air permeability of 30 cc/cm ² /sec or more is used. This is because if the air permeability is as low as less than 30 cc/cm ² /sec, the air containing water vapor tends to accumulate in the space covered with the tape member 3, and the accumulated air due to the heat generated when the outer skin 4 is covered. This is because there is a risk that the foam will be generated in the outer skin 4 by being discharged at once from the gaps of the nonwoven fabric and the overlapping portions of the tape member 3 . The air permeability can be measured by the Frazier method conforming to JIS L1913.

Moreover, it is desirable that the air permeability of the nonwoven fabric used for the tape member 3 is 200 cc/cm ² /sec or less. This is because when the air permeability exceeds 200 cc/cm ² /sec, a part of the outer cover 4 permeates the tape member 3 and reaches the electric wire 2 side when covering the outer cover 4 . This is because there is a possibility that the workability at the time of terminal processing will be lowered due to fusion with the outer cover 4 .

In other words, the nonwoven fabric used for the tape member 3 should preferably have an air permeability of 30 cc/cm ² /sec or more and 200 cc/cm ² /sec or less. In order to further suppress foaming of the outer cover 4 and fusion between the electric wires 2 and the outer cover 4 due to air accumulated in the nonwoven fabric, the nonwoven fabric used for the tape member 3 should have an air permeability of 40 cc/cm ² /sec or more and 100 cc/cm ² . /sec or less is more preferable.

Moreover, the thickness of the nonwoven fabric used as the tape member 3 is desirably 0.03 mm or more and 0.10 mm or less. This is because if the thickness of the non-woven fabric is less than 0.03 mm, a part of the outer skin 4 passes through the tape member 3 and reaches the electric wire 2 side when covering the outer skin 4, and the work at the time of terminal processing is difficult. If the thickness of the non-woven fabric exceeds 0.10 mm, the rigidity of the tape member 3 may increase and the flexibility of the cable 1 may decrease, and the air permeability may also decrease. This is because

In this embodiment, the tape member 3 is made of polyester nonwoven fabric having an air permeability of 67 cc/cm ² /sec and a thickness of 0.07 mm.

Furthermore, in the cable 1 according to the present embodiment, the tape member 3 and the outer cover 4 protrude inward from a common tangent line passing through the outer circumference of two wires 2 that are arranged in the outermost layer and are adjacent in the circumferential direction. It is formed so as to enter a valley portion between mating electric wires 2 and has an inward protrusion 10 which is spirally formed along the longitudinal direction of the cable. In FIG. 2 , a common tangent line passing through the outer peripheral surfaces of the two first electric wires 5 is denoted by reference numeral 11 . Note that when three or more electric wires 2 are used, a common tangent line passing through the outer peripheral surface of two adjacent electric wires 2 exists on the inner and outer peripheral sides of the cable 1, but the common tangent line refers to a tangent line on the outer peripheral side of the cable 1 .

That is, in the present embodiment, the tape member 3 and the outer cover 4 enter into the outer valleys of the adjacent electric wires 2 . As a result, the hollow portion formed around the electric wire 2 is reduced, and buckling is less likely to occur even when the cable 1 is bent or twisted. In addition, since the tape member 3 is in the valley between the electric wires 2 and is restricted from moving radially outward by the outer cover 4, the tape member 3 is difficult to move in the longitudinal direction of the cable. Become.

If the inward protrusion length of the inward protrusion 10 is short, there is a risk that the effect of suppressing buckling and the effect of suppressing the movement of the tape member 3 may not be sufficiently obtained. The distance d between the common tangent line 11 passing through the outer peripheral surface of the adjacent electric wires 2 and the tip of the inwardly protruding portion 10 is the electric wire 2 with the largest outer diameter among the plurality of electric wires 2 (here Then, it is desirable that it is 3% or more, preferably 10% or more, of the outer diameter of the first electric wire 5).

For example, when the outer diameter of the first electric wire 5 is 3 mm, it is desirable that the distance d is at least 0.1 mm or more. Although it depends on the outer diameter of the electric wire 2 to be used, it can be said that the distance d is preferably at least 0.1 mm or more, preferably 0.3 mm or more in order to obtain the effect of having the inward protrusion 10 . . It should be noted that the distance d does not always have to be constant, and some variation is allowed.

Furthermore, if the projecting length of the inward projecting portion 10 is too large, there is a risk that the workability during terminal processing (for example, during stripping work for removing the outer skin 4) will be reduced. It is desirable that the outer diameter is 40% or less, preferably 35% or less, of the outer diameter of the electric wire 2 (here, the first electric wire 5) having the largest outer diameter. Although it depends on the outer diameter of the electric wire 2 to be used, it can be said that the distance d is preferably set to 1 mm or less from the viewpoint of easily removing the outer sheath 4 .

If the twisting direction of the plurality of electric wires 2 and the winding direction of the tape member 3 are different, it becomes difficult for the tape member 3 to enter the valley portion of the adjacent electric wires 2, so the twisting direction of the plurality of electric wires 2 and the winding direction of the tape member 3 The direction is desirably the same direction. As a result, by winding the tape member 3 around the aggregate 9 while applying an appropriate tension, the tape member 3 can be easily inserted into the valleys of the adjacent electric wires 2 . After that, if the outer skin 4 is provided around the tape member 3 by extrusion coating, the inward protrusion 10 is formed.

The twisting direction of the electric wire 2 here means that the electric wire 2 rotates from the base end side to the tip end side when the cable 1 is viewed from the tip side (the side where the tape member 3 overlaps upward). say the direction In addition, the winding direction of the tape member 3 is the direction in which the tape member 3 rotates from the proximal side to the distal side when the cable 1 is viewed from the distal end side (the side where the tape member 3 overlaps upward). Say.

In addition, by making the twisting direction of the electric wire 2 and the winding direction of the tape member 3 the same direction, when the tape member 3 is unwound during terminal processing, the twist of the electric wire 2 is naturally loosened. It becomes easier to loosen. As a result, the ease of dismantling the cable 1 is improved, and the workability at the time of terminal processing is improved.

In addition, by setting the twisting direction of the electric wire 2 and the winding direction of the tape member 3 to be the same, the electric wire 2 and the tape member 3 can be opened or closed in synchronization when the cable 1 is twisted. Thus, the load due to twisting can be distributed, and excessive load applied to a portion of the cable 1 can be suppressed, and durability against twisting can be improved.

If the twisting pitch of the electric wire 2 is reduced, the cable 1 can be easily bent and the flexibility is improved, but there is no room for twisting, and the durability against twisting is lowered. Conversely, if the twist pitch of the wire 2 is increased, the resistance to twisting is improved, but the flexibility is reduced. In this embodiment, when a twist is applied, the electric wire 2 and the tape member 3 are opened and closed in synchronism to disperse the load, so the twist pitch of the electric wire 2 is reduced to improve flexibility. Even in the case of being oriented, it is possible to ensure sufficient durability against twisting.

Also, in order to allow the tape member 3 to enter the valleys of the adjacent electric wires 2 more easily, it is desirable that the twist pitch of the plurality of electric wires 2 and the winding pitch of the tape member 3 be equal. In addition, "the twist pitch of the plurality of electric wires 2 and the winding pitch of the tape member 3 are equal" here means that the twist pitch of the plurality of electric wires 2 and the winding pitch of the tape member 3 are completely matched. It is not limited to the case where the twist pitch of the plurality of electric wires 2 and the winding pitch of the tape member 3 are slightly different (within ±10%).

The inwardly protruding portion 10 is desirably formed along the entire longitudinal direction of the cable 1, but the inwardly protruding portion 10 may be interrupted in the middle. In other words, the cable 1 does not have to have the inwardly projecting portion 10 in a part of its longitudinal direction. For example, by changing the winding pitch of the tape member 3 at the terminal portion (a predetermined distance from the terminal) of the cable 1, the inward protruding portion 10 is not formed (or the protruding length (distance d) of the inward protruding portion 10 is reduced). It is also possible to improve workability during terminal processing.

In the present embodiment, a case has been described in which the inward protruding portion 10 is formed between each of the three electric wires 2 (valley portion). It is sufficient that the inward projecting portion 10 is formed at one of them.

In addition, in the present embodiment, both the tape member 3 and the outer cover 4 are configured to protrude inward from the tangent line 11, but this is not the only option. , only the tape member 3 may be configured to protrude inward from the tangent line 11 . However, it is necessary that the outer skin 4 is formed so as to protrude inwardly (in close contact with the outer peripheral surface of the tape member 3) at the inward protruding portion 10. As shown in FIG.

(Description of harness using cable 1)
FIG. 3 is a schematic configuration diagram of a harness according to this embodiment.

As shown in FIG. 3, the harness 20 includes the cable 1 according to this embodiment and a connector attached to the end of the electric wire 2. As shown in FIG.

In FIG. 3 , the left side in the drawing shows the end on the wheel 102 side, and the right side in the drawing shows the end on the vehicle body 105 side (relay box 106 side). In the following description, the end of the harness 20 on the wheel 102 side is called "one end", and the end on the vehicle body 105 side (relay box 106 side) is called "the other end".

A wheel-side power connector 21a for connection with the EPB electric motor 101a is attached to one end of the pair of first wires 5 of the wires 2, and the other end of the pair of first wires 5 is attached with a vehicle body side power connector 21b for connection with the electric wire group 107 in the junction box 106 .

An ABS sensor 104a formed by resin molding so as to cover the inner sheath 7 is attached to one end of the multicore electric wire 8 (a pair of second electric wires 6). 6) is attached with a vehicle-body-side ABS connector 22 for connection to the wire group 107 in the relay box 106 .

In addition, although the case of providing individual connectors for the first electric wire 5 and the multicore electric wire 8 (second electric wire 6) has been described here, a dedicated connector for collectively connecting all the electric wires 2 may be provided. I don't mind.

(Actions and effects of the embodiment)
As described above, in the cable 1 according to the present embodiment, the tape member 3 is made of a nonwoven fabric made of polyester, polypropylene, aramid fiber, nylon, acrylic fiber, or glass fiber, and the nonwoven fabric has an air permeability of 30 cc. /cm ² /sec or more.

By using a non-woven fabric made of polyester, polypropylene, aramid fiber, nylon, acrylic fiber, or glass fiber as the non-woven fabric used for the tape member 3, the tape member 3 is less likely to absorb moisture, and the moisture absorbed by the tape member 3 causes the outer skin 4 to break. It becomes possible to suppress the occurrence of voids in the

In addition, by setting the air permeability of the nonwoven fabric used for the tape member 3 to 30 cc/cm ² /sec or more, it is possible to suppress the occurrence of voids in the outer skin 4 due to the air accumulated in the space covered by the nonwoven fabric. become.

In addition, in the cable 1 according to the present embodiment, the tape member 3 and the outer cover 4 protrude inward from a common tangent line 11 that passes through the outer circumference of two wires 2 that are arranged in the outermost layer and are adjacent in the circumferential direction, It is formed so as to enter between the valleys of the adjacent electric wires 2 and has an inward protrusion 10 formed spirally along the longitudinal direction of the cable.

By having the inward projecting portion 10 that enters the valley portion of the electric wire 2, the hollow portion around the electric wire 2 is made smaller compared to the case where the inward projecting portion 10 is not provided, and bending and twisting are added to the cable 1. Even when the cable 1 is bent, it is possible to suppress the cable 1 from buckling.

In addition, since the inward projecting portion 10 suppresses the movement of the tape member 3, it is possible to suppress the movement of the tape member 3 in the longitudinal direction of the cable, and the tape member 3 overlaps with a part of the cable 1 to increase flexibility. It becomes possible to suppress troubles, such as a decrease.

(Modification)
In the above embodiment, the case where the electric wire 2 has the multicore electric wire 8 has been described, but as shown in FIGS. 4 and 5, it may not have the multicore electric wire 8 . 4 shows the case of using three electric wires 2, and FIG. 5 shows the case of using two electric wires 2, but the number of electric wires 2 may be four or more. Also, the electric wire 2 need not be a power line, and may be a signal line.

Further, in the above-described embodiment, the outer cover 4 is composed of one layer, but it may be composed of two or more layers. By forming the outer sheath 4 to have a structure of two or more layers and carrying out extrusion coating multiple times, it is possible to make the cross-sectional shape of the cable 1 closer to a circular shape and improve the appearance.

Further, in the above embodiment, the cable 1 connects the wheel 102 side and the vehicle body 105 side of the vehicle 100, but the use of the cable 1 is not limited to this. For example, the cable 1 may be used for connecting a motor and an inverter in a hybrid vehicle or an electric vehicle, or may be used for applications other than vehicles.

In the above embodiment, the tape member 3 is spirally wound around the twisted wires 2, but the wires 2 may not be twisted, and the tape member 3 may be wound vertically. may

Further, in the above-described embodiment, the case where the tape member 3 and the outer cover 4 have the inwardly projecting portion 10 has been described, but the inwardly projecting portion 10 can be omitted.

(Summary of embodiment)
Next, technical ideas understood from the embodiments described above will be described with reference to the reference numerals and the like in the embodiments. However, each reference numeral and the like in the following description do not limit the constituent elements in the claims to the members and the like specifically shown in the embodiment.

[1] Consisting of a plurality of electric wires (2), a tape member (3) wound around the plurality of electric wires (2), and a urethane-based resin coated on the outer periphery of the tape member (3) and a skin (4), wherein the tape member (3) is made of a nonwoven fabric made of polyester, polypropylene, aramid fiber, nylon, acrylic fiber, or glass fiber, and the air permeability of the nonwoven fabric is 30 cc/cm ² . /sec or greater, cable (1).

[2] The cable (1) according to [1], wherein the nonwoven fabric used for the tape member (3) has a thickness of 0.03 mm or more and 0.10 mm or less.

[3] The plurality of electric wires (2) are twisted together, and the tape member (3) is spirally wound around the plurality of electric wires (2), [1] or [2] A cable (1) according to .

[4] The tape member (3) and the outer skin (4) protrude inward from a common tangent line passing through the outer periphery of the two wires (2) arranged in the outermost layer and adjacent in the circumferential direction, The cable according to [3], which has an inward projection (10) formed in a helical shape along the longitudinal direction of the cable so as to enter a valley portion between adjacent electric wires (2). (1).

[5] The cable (1) according to [3] or [4], wherein the twisting direction of the plurality of electric wires (2) and the winding direction of the tape member (3) are the same.

[6] The cable (1) according to [5], wherein the twist pitch of the plurality of electric wires (2) and the winding pitch of the tape member (3) are equal.

[7] The plurality of electric wires (2) are power lines (5 A cable (1) according to any one of [1] to [6], comprising:

[8] Any of [1] to [7], wherein the plurality of electric wires (2) include a multicore electric wire (8) in which a plurality of insulated electric wires (6) are collectively covered with an inner sheath (7) or a cable (1) according to claim 1.

[9] The cable (1) according to [8], wherein the insulated wire (6) is a signal wire for a sensor mounted on a wheel (102) of a vehicle (100).

[10] A harness (20) comprising the cable (1) according to any one of [1] to [9] and a connector attached to an end of the electric wire (2).

Although the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the scope of claims. Also, it should be noted that not all combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

The present invention can be appropriately modified and implemented without departing from the gist thereof.

DESCRIPTION OF SYMBOLS 1... Cable 2... Electric wire 3... Tape member 4... Jacket 5... First electric wire 6... Second electric wire (insulated electric wire)
7... Inner sheath 8... Multi-core electric wire 9... Aggregate 10... Inward projecting portion 11... Tangential wire

Claims (6)

a plurality of first electric wires comprising a first conductor and a first insulator covering the periphery of the first conductor ;
a multicore electric wire in which a plurality of second electric wires each having a second conductor and a second insulator covering the periphery of the second conductor are collectively covered with an inner sheath;
a layered intervening layer provided around an aggregate formed by twisting the plurality of first electric wires and the multicore electric wire and forming a space between the aggregate and the aggregate;
an outer skin made of a urethane-based resin coated on the outer periphery of the intervening layer;
with
The intervening layer is composed of one sheet of nonwoven fabric tape member having a thickness of 0.03 mm or more and 0.10 mm or less and an air permeability of 30 cc/cm ² /sec or more. A cable that is spirally wound around the assembly without partially overlapping each other. The twisting direction of the assembly and the winding direction of the tape member are the same direction,
Cable according to claim 1. A twist pitch of the assembly and a winding pitch of the tape member are equal,
Cable according to claim 2. The plurality of first wires includes a power wire for supplying drive current to an electric motor for an electric parking brake mounted on wheels of a vehicle,
Cable according to any one of claims 1 to 3. The second wire is a signal wire for a sensor mounted on a vehicle wheel,
Cable according to claim 4. A cable according to any one of claims 1 to 5;
a connector attached to the end of the first electric wire;
a molded body formed by resin molding at the end of the multicore electric wire;
with
Harness.

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