JP6909416B2 - Cable and wire harness - Google Patents

Description

The present invention relates to a cable and a wire harness, and more particularly to a cable and a wire harness that connect a wheel side and a vehicle body side in a vehicle such as an automobile.

In recent years, electric braking devices have been used in vehicles such as automobiles.

As an electric braking device, an electro-mechanical brake (EMB) and an electric parking brake (Electric Parking Brake, EPB) are known.

The electromechanical brake is also simply called an electric brake or an electric brake, and is a dedicated electric motor provided on each wheel of the vehicle according to the amount of operation (pedal force or displacement) of the brake pedal by the driver. By controlling the rotational driving force of the wheel and pressing the brake pad against the disc rotor of the wheel by the piston driven by the electric motor, the braking force according to the driver's intention is generated.

In the electric parking brake, the driver operates the parking brake operation switch after the vehicle is stopped to drive a dedicated electric motor provided on each wheel of the vehicle, and the brake pad is driven by the piston driven by the electric motor. Is pressed against the disc rotor of the wheel to generate braking force.

Further, in recent vehicles, sensors such as an ABS (Anti-lock Brake System) sensor that detects the rotational speed of the running wheel, an air pressure sensor that detects the tire pressure, and a temperature sensor are mounted on the wheel. Often.

Therefore, the signal line for the sensor mounted on the wheel and the signal line for controlling the electromechanical brake and the power line for supplying power to the electric motor for the electromechanical brake and the electric parking brake are made into a common sheath. The accommodated cable is used to connect the wheel side and the vehicle body side. A cable in which a connector is integrally provided at the end of the cable is called a wire harness.

In Patent Document 1, talc powder is interposed between a plurality of electric wires and a sheath that collectively covers the plurality of electric wires to reduce friction between the electric wires and the sheath, and stress applied to the electric wires at the time of bending. Cables with improved bending durability have been proposed.

Japanese Unexamined Patent Publication No. 2014-135153

However, the cable described in Patent Document 1 has a problem that when the amount of talc powder used is large, the talc powder may be scattered in the working environment and the working environment may be deteriorated.

Therefore, an object of the present invention is to provide a cable and a wire harness capable of reducing deterioration of a working environment while maintaining bending durability.

An object of the present invention is to solve the above-mentioned problems, a plurality of electric wires, a paper tape wound around the plurality of electric wires, and an outer skin made of urethane resin coated on the outer periphery of the paper tape. Provided is a cable having an air permeation resistance of the paper tape according to the Garley testing machine method of 5.0 seconds / 100 cc or more.

The present invention also includes the cable and a connector attached to at least one of the ends of the first electric wire and the second electric wire for the purpose of solving the above problems. Also, a wire harness is provided.

According to the present invention, it is possible to provide a cable and a wire harness capable of reducing deterioration of a working environment while maintaining bending durability.

It is a block diagram which shows the structure of the vehicle which used the cable which concerns on one Embodiment of this invention. (A) is a cross-sectional view of a cable according to an embodiment of the present invention, and (b) is a diagram for explaining the twisting direction of the first electric wire and the second electric wire and the winding direction of paper tape in the cable of FIG. 2 (a). Is. It is a schematic block diagram of the wire harness which concerns on one Embodiment of this invention.

[Embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

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

As shown in FIG. 1, the 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 unit 101b.

The EPB electric motor 101a is mounted on the wheels 102 of the vehicle 100. The EPB control unit 101b is mounted on the ECU (electronic control unit) 103 of the vehicle 100. The EPB control unit 101b may be mounted on a control unit other than the ECU 103, or may be mounted on a dedicated hardware unit.

Although not shown, the EPB electric motor 101a is provided with a piston to which a brake pad is attached. By moving the piston by rotational drive of the EPB electric motor 101a, the brake pad is moved to the wheel 102. It is configured to be pressed against the wheel disc rotor to generate braking force. A pair of first electric wires 2 are connected to the EPB electric motor 101a as a power supply line for supplying a drive current to the EPB electric motor 101a.

The EPB control unit 101b outputs a drive current to the EPB electric motor 101a for a predetermined time (for example, 1 second) when the parking brake operation switch 101c is operated from the off state to the on state when the vehicle 100 is stopped. , The brake pad is pressed against the disc rotor of the wheel 102, and a braking force is generated 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 operated from the on state to the off state or when the accelerator pedal is depressed, and brakes. The pads are configured to be separated from the wheel disc rotors to release the braking force on the wheels 102. That is, the operating state of the EPB 101 is configured to be maintained after the parking brake operating switch 101c is turned on until the parking brake operating switch 101c is turned off or the accelerator pedal is depressed. The parking brake operation switch 101c may be a lever type or pedal type switch.

Further, the ABS device 104 is mounted on the vehicle 100. The ABS device 104 includes an ABS sensor 104a and an ABS control unit 104b.

The ABS sensor 104a detects the rotational speed of the wheel 102 during traveling, 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 so that the wheels 102 are not locked at the time of sudden stop, and controls the braking force of the wheels 102, and is mounted on the ECU 103. A pair of second electric wires 3 are connected to the ABS sensor 104a as signal lines.

The cable 1 according to the present embodiment is a cable 1 in which the first electric wire 2 and the second electric wire 3 are collectively covered with a sheath 7 (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 the battery (not shown) via the electric wire group 107.

Although only one wheel 102 is shown in FIG. 1 for simplification of the figure, 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.

(Explanation of cable 1)
FIG. 2A is a cross-sectional view of the cable 1 according to the present embodiment, and FIG. 2B is a diagram illustrating a twisting direction of the first electric wire and the second electric wire and a winding direction of the paper tape 6.

As shown in FIGS. 2A and 2B, the cable 1 is obtained by twisting a pair of first electric wires 2 and a pair of second electric wires 3 having an outer diameter smaller than that of the first electric wires 2. A paper tape 6 spirally wound around an aggregate 5 in which a pair of twisted wires 4 and a pair of first electric wires 2 and a pair of twisted wires 4 are twisted, and urethane coated on the outer periphery of the paper tape 6. It includes a sheath 7 as an outer skin made of a based resin.

In the present embodiment, the first electric wire 2 comprises a power supply line for supplying a drive current to the electric motor 101a for EPB 101 mounted on the wheels 102 of the vehicle 100. The second electric wire 3 is composed of a signal line for the ABS sensor 104a mounted on the wheel 102.

The first electric wire 2 is configured by coating a first insulator 22 made of an insulating resin such as cross-linked polyethylene around a first conductor 21 obtained by twisting a good conductive wire such as copper.

As the wire used for the first conductor 21, 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 bending durability may decrease. If a wire with a diameter of more than 0.30 mm is used, the flexibility of the cable 1 may be reduced. May decrease.

The outer diameter of the first conductor 21 of the first electric wire 2 and the thickness of the insulator 22 may be appropriately set according to the required magnitude of the drive current. In the present embodiment, considering that the first electric wire 2 is a power supply line for supplying a drive current to the electric motor 101a for EPB 101, the outer diameter of the first conductor 21 is set to 1.5 mm or more and 3.0 mm or less. At the same time, the outer diameter of the first electric wire 2 was set to 2.0 mm or more and 4.0 mm or less.

The second electric wire 3 is configured by coating a second insulator 32 made of an insulating resin such as cross-linked polyethylene around a second conductor 31 obtained by twisting a good conductive wire such as copper. As the wire used for the second conductor 31, a wire having a diameter of 0.05 mm or more and 0.30 mm or less can be used as in the case of the first conductor 21.

The outer diameter of the second electric wire 3 is smaller than the outer diameter of the first electric wire 2. In the present embodiment, in order to twist the paired twisted wire 4 obtained by twisting the pair (two) of the second electric wires 3 and the pair of the first electric wires 2, the outer diameter of the cable 1 is brought close to a circular shape. From the viewpoint, it can be said that it is desirable to use a second electric wire 3 having an outer diameter of about half of that of the first electric wire 2. Specifically, as the second electric wire 3, an electric wire having an outer diameter of 1.0 mm or more and 1.8 mm or less and a second conductor 31 having an outer diameter of 0.4 mm or more and 1.0 mm or less can be used.

The twist pitch P1 of the anti-twisted wire 4 may be set so as not to apply an unnecessary load to the second electric wire 3 in consideration of the outer diameter of the second electric wire 3. Here, the twist pitch P1 of the anti-twisted wire 4 is set to about 30 mm, but the twist pitch P1 of the anti-twisted wire 4 is not limited to this. The twist pitch P1 of the anti-twisted wire 4 is an interval along the longitudinal direction of the anti-twisted wire 4 in which an arbitrary second electric wire 3 is at the same position in the circumferential direction of the anti-twisted wire 4.

The aggregate 5 is formed by twisting a pair of first electric wires 2 and a pair of twisted wires 4. In the present embodiment, a pair of first electric wires 2 are brought into contact with each other, a pair of second electric wires 3 are brought into contact with each other, and a pair of first electric wires 2 and a second electric wire 3 are brought into contact with each other. The aggregate 5 was constructed. At this time, at least a part of the second electric wire 3 is arranged in the valley between the pair of the first electric wires 2.

Further, in the present embodiment, a plurality of thread-like (fibrous) interpositions extending in the longitudinal direction of the cable 1 are arranged between the pair of the first electric wires 2 and the pair of twisted wires 4 and the paper tape 6 (shown in the figure). The aggregate 5 was formed by twisting the first electric wire 2 together with the anti-twisted wire 4. Therefore, the twisting direction and twisting pitch of the plurality of interpositions are the same as the twisting direction and twisting pitch of the aggregate 5. The plurality of interpositions are arranged so as to fill the gap between the pair of first electric wires 2 and the pair of twisted wires 4 and the paper tape 6, and the cross-sectional shape when the paper tape 6 is wound around the outer periphery of the aggregate 5 is more circular. I try to get closer to.

It should be noted that a part of the plurality of interpositions may also be arranged in a valley between a pair of first electric wires 2 or a valley between a pair of second electric wires 3.

As the interposition, a fibrous material such as polypropylene yarn, rayon staple fiber, aramid fiber, nylon fiber, or fibrous plastic, or paper or cotton thread can be used. Further, in the cross-sectional view of FIG. 2, the cross-sectional area of the interposition is preferably smaller than the cross-sectional area of the first electric wire 2 and the cross-sectional area of the second electric wire 3.

The EPB 101 basically supplies a 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 traveling, and the ABS sensor 104a is rarely used when the drive current is supplied to the first electric wire 2 during normal use. Therefore, in the present embodiment, the shield conductor provided around the anti-twisted wire 4 is omitted. By omitting the shield conductor, the outer diameter of the cable 1 can be reduced as compared with the case where the shield conductor is provided, and the number of parts can be reduced to reduce the cost.

Although the case where the first electric wire 2 supplies the driving current to the EPB electric motor 101a is described here, the first electric wire 2 is, for example, an electromechanical brake provided on the wheel 102 (hereinafter, EMB). It may be used to supply a drive current to the electric motor (referred to as). In this case, since a current flows through the first electric wire 2 even while the vehicle 100 is traveling, it is desirable to provide a shield conductor around the anti-twisted wire 4 in order to suppress a malfunction of the ABS device 104 due to noise. It can be said that.

Further, although the case where the second electric wire 3 is a signal line for the ABS sensor 104a is described here, the second electric wire 3 detects the air pressure of another sensor provided on the wheel 102, for example, a temperature sensor or a tire. It may be a signal line used for an air pressure sensor or the like, a damper line used for controlling a vibration damping device of a vehicle 100, or a signal line for EMB control (CAN cable or the like). You may. Even when the first electric wire 2 supplies a drive current to the EPB electric motor 101a, when the second electric wire 3 is used while the vehicle 100 is stopped, in order to suppress a malfunction due to noise. It can be said that it is desirable to provide a shield conductor around the anti-twisted wire 4.

The outer diameter of the entire assembly 5 is, for example, about 5 mm to 9 mm. The twist pitch P2 of the aggregate 5 may be set so as not to apply an unnecessary load to the first electric wire 2 and the anti-twist wire 4 in consideration of the outer diameter of the aggregate 5. Here, the twist pitch P2 of the aggregate 5 is set to about 60 mm, but the twist pitch P2 of the aggregate 5 is not limited to this. The twist pitch P2 of the aggregate 5 is an interval along the longitudinal direction of the aggregate 5 in which the arbitrary first electric wire 2 or the anti-twisted wire 4 is at the same position in the circumferential direction of the aggregate 5.

A paper tape 6 is spirally wound around the aggregate 5, and in the present embodiment, the paper tape 6 is a pair of first electric wires 2 and a pair of twisted wires forming the aggregate 5. It is in contact with 4). The paper tape 6 is interposed between the assembly 5 and the sheath 7 and plays a role of reducing friction between the assembly 5 (electric wires 2 and 3) and the sheath 7 at the time of bending. That is, by providing the paper tape 6, the friction between the electric wires 2 and 3 and the sheath 7 is reduced without using a lubricant such as talc powder as in the conventional case, and the stress applied to the electric wires 2 and 3 at the time of bending is reduced. Therefore, it becomes possible to improve the bending durability.

As the paper tape 6, it is desirable to use one that is slippery (a tape having a small friction coefficient) with respect to the first insulator 22 of the first electric wire 2 and the second insulator 32 of the second electric wire 3. More specifically, as the paper tape 6, the friction coefficient (static friction coefficient) between the paper tape 6 and the insulators 22 and 32 is the friction coefficient between the sheath 7 and the insulators 22 and 32 when the paper tape 6 is not provided (static friction coefficient). It is preferable to use one smaller than the coefficient of static friction).

The paper tape 6 is formed into a tape by entwining fibers of plants and the like, and contains cellulose, hemicellulose, and the like as its components. Generally, paper tape is manufactured using wood pulp. Paper tape has an advantage that it is easier to tear than non-woven tape and has relatively high workability when processing the cable 1.

By the way, the present inventors have a problem that when a sheath made of urethane resin is coated on the outer circumference of a paper tape in the process of prototyping a cable, the sheath may foam and voids may be generated in the sheath. I found. As a result of diligent studies by the present inventors, when paper tape is wrapped around a plurality of electric wires in a humid environment, air containing moisture (moisture) accumulates in the space covered with the paper tape. Therefore, it was confirmed that the paper tape absorbs the moisture from the air accumulated in the space. Then, it was confirmed that when a sheath made of urethane resin was extruded and coated on the outer periphery of the paper tape containing water, the water evaporated from the paper tape due to the heat at the time of coating and the sheath foamed.

Therefore, the present inventors have come up with the idea of using a paper tape 6 having an air permeation resistance of 30.0 seconds / 100 cc or less according to the Garley testing machine method based on JIS P 8117: 2009. By doing so, it becomes possible to easily discharge the air containing moisture accumulated in the space to the outside of the space, and to reduce the foaming of the sheath 7.

Further, it is desirable that the air permeation resistance of the paper tape 6 by the Garley testing machine method is 5.0 seconds / 100 cc or more. If the paper tape 6 has an air permeation resistance smaller than 5.0 seconds / 100 cc by the Garley testing machine method, the strength of the paper tape 6 becomes weak, and when the paper tape 6 is wound around a plurality of electric wires, the paper tape 6 becomes This is because there is a risk of tearing and deterioration of workability.
From the viewpoint of further reducing the foaming of the sheath 7 and further reducing the risk of deterioration of workability, the air permeation resistance of the paper tape 6 by the Garley testing machine method is 6.0 seconds / 100 cc or more 20. It is more preferably 0 seconds / 100 cc or less.

In this embodiment, the paper tape 6 used has an air permeation resistance of 7.3 seconds / 100 cc.

In the present embodiment, the paper tape 6 is spirally wound around the assembly 5 so that parts of the paper tape 6 overlap in the width direction (direction perpendicular to the longitudinal direction and the thickness direction of the paper tape 6). The width on which the paper tapes 6 overlap is, for example, 1/4 or more and 1/2 or less of the width of the paper tapes 6. The paper tape 6 may be wound around the assembly 5 by vertical winding.

The width of the paper tape 6 may be such that wrinkles do not form on the paper tape 6 when the paper tape 6 is wound, and it is desirable to use the paper tape 6 which is narrower as the outer diameter of the entire aggregate 5 becomes smaller. Specifically, when the outer diameter of the aggregate 5 is 5 mm to 9 mm, the width of the paper tape 6 may be about 20 mm to 50 mm. The winding pitch P3 of the paper tape 6, that is, the distance along the longitudinal direction in which the paper tape 6 is at the same position in the circumferential direction (for example, the distance between one ends in the width direction) is the width and the overlap width of the paper tape 6 (the winding angle of the paper tape 6). ), And in this case, the maximum is about 40 mm. Here, the winding pitch P3 of the paper tape 6 is set to about 30 mm, but the winding pitch P3 of the paper tape 6 is not limited to this.

When the paper tape 6 is spirally wound around the aggregate 5, if the width of the paper tape 6 is increased and the winding pitch P3 is increased, the paper tape 6 becomes closer to the vertically attached state, and the flexibility of the cable 1 becomes smaller. It is lost and difficult to bend. Therefore, it is desirable that the winding pitch P3 of the paper tape 6 is 40 mm or less. When the width of the paper tape 6 is reduced and the winding pitch P3 is reduced, the number of windings increases and the cable 1 is likely to have a bending habit. However, in the present embodiment, the bending habit given by the paper tape 6 is used. Then, the bending habit due to the twist of the aggregate 5 will be corrected (details will be described later).

A sheath 7 as an exodermis is provided around the paper tape 6. The sheath 7 is made of a urethane resin. In the present embodiment, the first electric wire 2 supplies the driving current to the EPB electric motor 101a, and the driving current flows through the first electric wire 2 for a relatively short time. Therefore, a shield provided around the paper tape 6 is provided. Although the conductor is omitted, a shield conductor may be provided between the paper tape 6 and the sheath 7 or on the outer periphery of the sheath 7, depending on the application of the first electric wire 2.

(Twisting direction of anti-twisted wire 4 and assembly 5, winding direction of paper tape 6)
In the cable 1 according to the present embodiment, the twisting direction of the anti-twisted wire 4 and the twisting direction of the aggregate 5 are different, and the twisting direction of the aggregate 5 and the winding direction of the paper tape 6 are different. That is, in the cable 1, the twisting direction of the anti-twisted wire 4 and the winding direction of the paper tape 6 are the same, and only the twisting direction of the aggregate 5 is different.

The twisting direction referred to here means that the electric wires 2 and 3 rotate from the base end side to the tip side when the cable 1 is viewed from the tip side (the left side of FIG. 2B, the side where the paper tape 6 overlaps upward). The direction in which you are doing. Here, the twisting direction of the anti-twisted wire 4 is clockwise (clockwise), and the twisting direction of the aggregate 5 is counterclockwise (counterclockwise). The twisting direction of the anti-twisted wire 4 is the direction in which the two second electric wires 3 are twisted together, and the twisting direction of the aggregate 5 is the twisting direction of the two first electric wires 2 and the anti-twisted wire 4. It is the direction to match.

Further, the winding direction of the paper tape 6 is that the paper tape 6 rotates from the base end side to the tip side when the cable 1 is viewed from the tip side (the left side of FIG. 2B, the side where the paper tape 6 overlaps upward). Refers to the direction. Here, the winding direction of the paper tape 6 is clockwise (clockwise). FIG. 2A shows a cross-sectional view when viewed from the tip side. The twisting direction of the anti-twisted wire 4 is the broken line arrow A, the twisting direction of the aggregate 5 is the broken line arrow B, and the winding direction of the paper tape 6 is the broken line arrow C. It is represented by.

In general, when electric wires are twisted together or tape is wound in a spiral shape, a bending habit is given according to the twisting direction and the winding direction, and the entire cable is naturally curved. In the present embodiment, the twisting direction of the anti-twisted wire 4 and the twisting direction of the aggregate 5 are different, and the twisting direction of the aggregate 5 and the winding direction of the paper tape 6 are different. The bending habit of 4 and the bending habit of the aggregate 5 are in opposite directions and cancel each other out, and the bending habit of the aggregate 5 and the bending habit of wrapping the paper tape 6 are opposite to each other and cancel each other out. Therefore, it is possible to easily realize a linear cable 1 in which bending habits are suppressed. As a result, it is possible to suppress variations in bending characteristics in the longitudinal direction of the cable 1.

Further, when the twisting direction of the anti-twisted wire 4 and the twisting direction of the aggregate 5 are the same, the anti-twisted wire 4 is twisted in the direction in which the twist is tightened when the aggregate 5 is twisted, and the anti-twisted wire 4 is twisted. The twist pitch P1 may change. By making the twisting direction of the anti-twisted wire 4 different from the twisting direction of the aggregate 5, it is possible to form the aggregate 5 while suppressing the change in the twist pitch P1 of the anti-twisted wire 4.

However, if the twist pitch P1 of the anti-twisted wire 4 is large, the twist of the anti-twisted wire 4 may be loosened when the aggregate 5 is twisted together. Therefore, it is desirable that the twist pitch P1 of the anti-twisted wire 4 is at least smaller than the twist pitch P2 of the aggregate 5. That is, when the twisting direction of the anti-twisted wire 4 and the twisting direction of the aggregate 5 are different, the twist pitch P1 of the anti-twisted wire 4 is made smaller than the twist pitch P2 of the aggregate 5, so that the anti-twisted wire 4 The twist of the assembly 5 is less likely to be broken, and the cross-sectional shape of the assembly 5 can be stabilized.

In the present embodiment, since the bending habit of the aggregate 5 is corrected by the bending habit of winding the paper tape 6, it is necessary to reduce the winding pitch P3 of the paper tape 6 to such that the bending habit can be imparted. Therefore, it is desirable that the winding pitch P3 of the paper tape 6 is at least smaller than the twisting pitch P2 of the aggregate 5. In the present embodiment, the twist pitch P1 of the anti-twisted wire 4 is about 30 mm, the twist pitch P2 of the aggregate 5 is about 60 mm, and the winding pitch P3 of the paper tape 6 is about 30 mm.

In the present embodiment, the winding pitch P3 of the paper tape 6 and the twisting pitch P1 of the anti-twisted wire 4 are the same, but if the winding pitch P3 of the paper tape 6 is set to the twist pitch P1 or more of the anti-twisted wire 4. good. By doing so, the distortion of the paper tape 6 at the portion in contact with the anti-twisted wire 4 can be reduced, and the cross-sectional shape of the cable 1 can be easily formed into a circular shape. In addition, it has the effect of reducing the decrease in bending durability of the anti-twisted wire 4.

Similarly, by making the twisting direction of the aggregate 5 different from the winding direction of the paper tape 6, the twist pitch P2 of the aggregate 5 is less likely to change when the paper tape 6 is wound, and the twist pitch P2 of the aggregate 5 is changed. It becomes possible to stabilize.

Further, by making the twisting direction of the aggregate 5 different from the winding direction of the paper tape 6, the paper tape 6 enters the gap between the first electric wires 2 or between the first electric wire 2 and the anti-twisted wire 4. This is suppressed, and the cross-sectional shape of the cable 1 can be made closer to a circular shape. As a result, the appearance of the cable 1 can be improved, and the stripping operation for removing the sheath 7 can be easily performed. As described above, since the bending habit is suppressed in the cable 1, the stripping operation for removing the sheath 7 is easier.

Furthermore, by making the twisting direction of the assembly 5 different from the winding direction of the paper tape 6, the direction in which the assembly 5 is likely to buckle and the direction in which the paper tape 6 is likely to buckle can be made different. Even when twisting and bending are applied at the same time, the cable 1 that does not easily buckle can be realized.

(Explanation of wire harness using cable 1)
FIG. 3 is a schematic configuration diagram of a wire harness according to the present embodiment.

As shown in FIG. 3, the wire harness 10 includes a cable 1 according to the present embodiment, a connector attached to at least one of the ends of the first electric wire 2 and the second electric wire 3, and a connector. Is configured with.

In FIG. 3, the left side in the drawing shows the end portion on the wheel 102 side, and the right side in the drawing shows the end portion on the vehicle body 105 side (relay box 106 side). In the following description, the end portion of the wire harness 10 on the wheel 102 side is referred to as "one end portion", and the end portion on the vehicle body 105 side (relay box 106 side) is referred to as "other end portion".

A wheel-side power connector 11a for connecting to the EPB electric motor 101a is attached to one end of the pair of first electric wires 2, and a relay box 16 is attached to the other end of the pair of first electric wires 2. A vehicle body side power connector 11b for connecting to the electric wire group 107 inside is attached.

An ABS sensor 104a is attached to one end of a pair of second electric wires 3 (paired wires 4), and inside a relay box 106 at the other end of a pair of second electric wires 3 (paired wires 4). Wire group 10 in
A vehicle body side ABS connector 12 for connection with 7 is attached.

In addition, although the place where the first electric wire 2 and the second electric wire 3 (pair stranded wire 4) are individually provided with a connector is described here, a dedicated connector for connecting both electric wires 2 and 3 at once is provided. It doesn't matter.

(Actions and effects of embodiments)
As described above, the cable 1 according to the present embodiment includes the paper tape 6 spirally wound around the aggregate 5.

By providing the paper tape 6, the friction between the electric wires 2 and 3 and the sheath 7 is reduced, the stress applied to the electric wires 2 and 3 at the time of bending is reduced, and the bending durability is reduced without using a lubricant such as talc powder. Can be improved. Since the paper tape 6 can be easily removed during terminal processing, it is possible to improve the workability of terminal processing while maintaining bending durability.

Further, the air permeation resistance of the paper tape 6 by the Garley testing machine method is 30.0 seconds / 100 cc or less. By doing so, the air accumulated (containing moisture) in the space covered with the paper tape 6 can be easily discharged to the outside of the space, and the paper tape 6 absorbs the moisture from the air accumulated in the space. It is possible to reduce the amount of waste. This makes it possible to reduce the foaming of the sheath 7.

Further, by making the twisting direction of the anti-twisted wire 4 different from the twisting direction of the aggregate 5 and the twisting direction of the aggregate 5 different from the winding direction of the paper tape 6, bending due to twisting or winding of the paper tape 6 is performed. It is possible to suppress the habit and stabilize the twist pitches P1 and P2 of the anti-twisted wire 4 and the aggregate 5. As a result, it is possible to suppress variations in bending characteristics, and it is possible to realize a cable 1 having stable flexibility in the longitudinal direction and easy to arrange. Further, since the cross-sectional shape of the cable 1 can be made closer to a circular shape, the stripping work of the sheath 7 becomes easy.

(Summary of embodiments)
Next, the technical idea grasped from the above-described embodiment will be described with reference to the reference numerals and the like in the embodiment. However, the respective reference numerals and the like in the following description are not limited to the members and the like in which the components in the claims are specifically shown in the embodiment.

[1] A plurality of electric wires (first electric wire (2), second electric wire (3)), paper tape (6) wound around the plurality of electric wires, and the outer periphery of the paper tape (6) are covered. A cable (1) comprising an outer skin (7) made of a urethane-based resin, and having an air permeation resistance of the paper tape (6) according to the Garley testing machine method of 5.0 seconds / 100 cc or more.

[2] The cable (1) according to [1], wherein the air permeation resistance of the paper tape (6) by the Garley testing machine method is 30.0 seconds / 100 cc or less.

[3] The plurality of electric wires are paired twisted wires (3) obtained by twisting a pair of first electric wires (2) and a pair of second electric wires (3) having an outer diameter smaller than that of the first electric wire (2). 4), and the paper tape (6) is spirally wound around an aggregate (5) in which the pair of first electric wires (2) and the twisted wire (4) are twisted together. The twisting direction of the anti-twisted wire (4) and the twisting direction of the aggregate (5) are different, and the twisting direction of the aggregate (5) and the winding direction of the paper tape (6). The cable (1) according to [1] or [2], which is different from the above.

[4] The twist pitch of the anti-twisted wire (4) is smaller than the twist pitch of the aggregate (5), and the winding pitch of the paper tape (6) is smaller than the twist pitch of the aggregate (5). , The cable (1) according to [3], which is equal to or greater than the twist pitch of the anti-twisted wire (4).

[5] The first electric wire (2) comprises a power supply line for supplying a drive current to an electric motor (101a) for an electric parking brake (101) mounted on a wheel (102) of a vehicle (100). , [3] or [4].

[6] The cable according to any one of [3] to [5], wherein the second electric wire (3) is composed of a signal line for a sensor mounted on a wheel (102) of a vehicle (100). 1).

[7] The aggregate (5) has a pair of first electric wires (2) and a plurality of thread-like interpositions arranged between the pair of twisted wires (4) and the paper tape (6). , The plurality of interpositions are twisted together with the pair of first electric wires (2) and the pair of twisted wires (4), and the twisting direction of the plurality of interpositions is the same as the twisting direction of the aggregate (5). The cable according to any one of [3] to [6], which is different from the winding direction of the paper tape (6).

[8] At least one end of the cable (1) according to any one of [3] to [7] and the ends of the first electric wire (2) and the second electric wire (3). A wire harness (10) with a connector attached to the portion.

Although the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. It should also 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 spirit of the present invention.

1 ... Cable 2 ... 1st electric wire 3 ... 2nd electric wire 4 ... Anti-twisted wire 5 ... Aggregate 6 ... Paper tape 7 ... Sheath (outer skin)

Claims (4)

A conductor, a plurality of electric wires formed by coating an insulator around the conductor, and
A tape member wound around the plurality of electric wires and
An outer skin made of urethane resin coated on the outer circumference of the tape member, and
With
The air permeation resistance of the tape member by the Garley testing machine method is 5.0 seconds / 100 cc or more and 30.0 seconds / 100 cc or less.
The plurality of electric wires include a pair of first electric wires and a pair of twisted wires obtained by twisting a pair of second electric wires.
The tape member is spirally wound around an aggregate obtained by twisting the pair of first electric wires and the pair of twisted wires.
The twist pitch of the anti-twisted wire is smaller than the twist pitch of the aggregate,
The winding pitch of the tape member is smaller than the twist pitch of the aggregate and equal to or greater than the twist pitch of the anti-twisted wire.
cable. The first electric wire comprises a power supply line for supplying a driving current to an electric motor for an electric parking brake mounted on a wheel of a vehicle.
The cable according to claim 1. The second electric wire comprises a signal line for a sensor mounted on a wheel of a vehicle.
The cable according to claim 1 or 2. The cable according to any one of claims 1 to 3 and
A connector attached to at least one of the ends of the first electric wire and the second electric wire.
Wire harness.

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