Composite cable
The composite cable design with twisted strands and optimized air gap occupancy improves bending resistance, ensuring durability under varying temperatures.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- FURUKAWA ELECTRIC CO LTD
- Filing Date
- 2024-06-17
- Publication Date
- 2026-06-19
AI Technical Summary
Composite cables used in vehicles for integrating power and signal lines face challenges in maintaining repeated bending resistance, especially under extreme cold conditions, due to repeated bending and stretching when attached to the tire area, which can lead to breakage.
The composite cable design includes multiple signal and power lines with resin layers, twisted strands of conductors, and a specific twist ratio and air gap occupancy rate to enhance flexibility and resistance to repeated bending.
The cable exhibits excellent repeated bending properties at both room and low temperatures, reducing the likelihood of breakage and damage under various conditions.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to a composite cable, and particularly to a composite cable disposed in a vehicle or the like.
Background Art
[0002] Conventionally, in a vehicle, in order to operate an anti-lock brake system (hereinafter referred to as ABS), an ABS cable (signal line) for transmitting a signal from an ABS sensor disposed near a wheel to an ABS control device is known. In recent years, with the spread of an electric parking brake (hereinafter referred to as EPB), an EPB cable (power line) for supplying power from an EPB control device to an actuator of the EPB is also known.
[0003] In a vehicle, since an ABS control device and an EPB control device are disposed at a close position or substantially the same position, while an ABS sensor and an actuator of an electric brake are disposed at a wheel portion, respectively, ABS cables and EPB cables connecting them are usually assembled in the vehicle in the same route. Therefore, conventionally, these cables have often been assembled in the vehicle by being wound together with tape or bundled with a binding band.
[0004] On the other hand, in recent years, development of a composite cable in which these cables are integrated into one cable has been promoted. For example, in Patent Document 1, a composite cable in which a pair of power lines (EPB cables) and a pair of signal lines (ABS cables) are collectively sheathed is disclosed. Also, for example, in Patent Documents 2 and 3, a composite cable including a pair of power lines and two pairs of signal lines is disclosed.
[0005] Furthermore, by combining power lines (e.g., EPB cables) and signal lines (e.g., ABS cables) into a single composite cable, there is an advantage in that the space occupied by the cables inside the vehicle can be reduced (space saving) compared to installing the EPB cable and ABS cable separately inside the vehicle or bundling them together, as described above. [Prior art documents] [Patent Documents]
[0006] [Patent Document 1] Patent No. 5541331 [Patent Document 2] Patent No. 6219263 [Patent Document 3] Patent No. 6424950 [Overview of the project] [Problems that the invention aims to solve]
[0007] By the way, when a composite cable containing power lines for the EPB and signal lines for the ABS is installed inside the vehicle, one end of the composite cable is attached to the vehicle's tire (brake) area. As a result, the composite cable bends and stretches every time the steering wheel is turned and the direction of the tire changes, and bending forces are repeatedly applied to the composite cable. Therefore, composite cables are required to have high resistance to repeated bending (hereinafter referred to as repeated bending resistance, also called bending resistance, etc., that is, the property that power lines and signal lines are less likely to break even when the composite cable is repeatedly bent).
[0008] Furthermore, in North America, Russia, Northern Europe, and high-altitude regions, temperatures can drop to extremely cold levels of -40°C. Composite cables must withstand repeated bending in such harsh conditions, making them resistant to breakage of power and signal lines. In other words, they must exhibit high resilience to repeated bending at low temperatures.
[0009] This invention was made in view of the above-mentioned problems, and aims to provide a composite cable that exhibits excellent repeated bending properties not only at room temperature but also at low temperatures. [Means for solving the problem]
[0012] Claim 1 The invention described is In all cases, the composite cable comprises multiple signal lines and multiple power lines, each having a resin layer on the outer circumference of the conductor, The signal line is thinner than the power line. The strands that make up the conductor of the signal line are twisted together. The strands that make up the conductor of the power line are twisted together. Two or more of the aforementioned multiple signal lines are further twisted together. The signal line and the power line are further twisted together. The occupancy rate of the conductor's air gaps in the cross-section of the power line is 26-40%. the law of nature, The power supply line is characterized in that the stranding ratio of the wires constituting the conductor is 1.03 to 1.07.
[0013] Claim 2 The invention described is Claim 1 The composite cable described above is characterized in that the tensile modulus of the resin layer of the power line is 150 to 1000 MPa at (23±2)°C.
[0014] Claim 3 The invention described in claim 1 or claim 2 The composite cable described above is characterized in that the plurality of power lines include power lines for vehicle brake control.
[0015] Claim 4 The invention described above is as follows: Claim 3In the composite cable according to any one of the above, the plurality of power lines include a power line for supplying power from a control device of an electric parking brake to an actuator, and the plurality of signal lines include a signal line for transmitting a signal from a sensor of an anti-lock braking system to a control device. 。
Advantages of the Invention
[0016] According to the present invention, a composite cable including a plurality of power lines and a plurality of signal lines has excellent repeated flexibility not only at normal temperature but also at low temperature.
Brief Description of the Drawings
[0017] [Figure 1] It is a diagram showing a state where the signal line of the composite cable is connected to an ABS sensor and an ABS control device, and the power line is connected to an EPB control device and an actuator. [Figure 2] It is a cross-sectional view showing a configuration example of the composite cable according to the present embodiment, representing the case of 4 cores. [Figure 3] It is a cross-sectional view showing a configuration example of the composite cable according to the present embodiment, representing the case of 6 cores. [Figure 4] It is a diagram showing that the conductors of the power line and the signal line are formed by twisting a plurality of strands. [Figure 5] It is a diagram showing a state where the signal line and the power line are twisted together as a whole in the composite cable, (a) represents the case of 4 cores, and (b) represents the case of 6 cores. [Figure 6] It is a diagram for explaining the internal part of the resin layer of the power line from which the conductor has been removed. [Figure 7] It is a schematic view of the apparatus used for bending tests 1 to 3 as seen from the axial direction of the mandrel.
Embodiments for Carrying Out the Invention
[0018] Hereinafter, the composite cable according to the present invention will be described with reference to the drawings. However, while the embodiments described below are subject to various technically preferred limitations for carrying out the present invention, the scope of the present invention is not limited to the embodiments or illustrated examples described below.
[0019] The following description will focus on the case where multiple power lines within a composite cable include power lines for vehicle brake control, but the present invention is not necessarily limited to this case. Specifically, in this embodiment, as shown in Figure 1, the multiple signal lines 2 of the composite cable 1 include signal lines for transmitting signals from the anti-lock brake system sensor 11 to the control device 12, and the multiple power lines 3 include power lines for supplying power from the electric parking brake control device 13 to the actuator 14, but is not limited to this case.
[0020] Figures 2 and 3 are cross-sectional views showing examples of the configuration of a composite cable according to this embodiment, with Figure 3 showing the case of 4 cores and Figure 2 showing the case of 6 cores. In this embodiment, the composite cable 1 comprises a plurality of signal lines 2 and a plurality of power lines 3, and each signal line 2 and each power line 3 has an insulating resin layer 22 and 32 on the outer circumference of its conductor 21 and 31. The plurality of signal lines 2 and the plurality of power lines 3 are then covered together by a sheath layer 4.
[0021] The sheath layer 4 may be composed of multiple layers. Furthermore, the composite cable 1 only needs to have multiple signal lines 2 and multiple power lines 3, and is not limited to the 4-core or 6-core cases shown in Figures 2 and 3. In addition, although Figures 2 and 3 both show cases where two power lines 3 are provided, there may be three or more.
[0022] Furthermore, the dashed circles in Figures 2 and 3 that include pairs of signal lines 2 represent that the signal lines 2 are twisted together in predetermined groups. In this way, by configuring the signal lines 2 in such a way that two or more of the multiple signal lines 2 are twisted together, the twisted signal lines 2 become more flexible compared to when the signal lines 2 are not twisted together.
[0023] Furthermore, when the composite cable 1 is pulled in the longitudinal direction, the twisted signal wires 2 can stretch in that direction. Therefore, if the composite cable 1 is repeatedly subjected to bending forces, the twisted signal wires 2 will stretch, making it less likely for breakage or other damage to occur. In this way, by configuring the signal lines 2 to be twisted together in pairs or more, it is possible to improve the flexibility and repeated bending resistance of the composite cable 1.
[0024] In this embodiment, the signal line 2 is thinner than the power line 3, similar to a typical composite cable. The signal line 2 can be made by using a metal wire such as a copper alloy or aluminum alloy as the conductor 21, and covering it with an insulating resin layer 22 made of polyester or other resin. In the following explanation, we assume that the conductor 21 of signal line 2 is a metal wire, but the conductor 21 of signal line 2 may include, for example, an optical fiber core.
[0025] In this embodiment, as shown in Figure 4, the signal line 2 is constructed by twisting together multiple strands 21a of metal wires into a conductor 21. Note that Figure 4 does not represent that the conductor 21 (strand 21a) of signal line 2 and the conductor 31 (strand 31a) of power line 3, which will be described later, are of the same thickness.
[0026] Furthermore, by configuring it in this way, the signal line 2 itself becomes more flexible compared to when the strands 21a of the signal line 2 are not twisted together. Furthermore, when the composite cable 1 is pulled in the longitudinal direction, the signal line 2 itself can stretch in that direction. Therefore, if the composite cable 1 is repeatedly subjected to bending forces, the signal line 2 itself will stretch, making it less likely for breakage or other damage to occur. In this way, by constructing the conductor 21 of the signal line 2 by twisting together multiple strands 21a, it is possible to improve the flexibility and repeated bending resistance of the composite cable 1.
[0027] The power supply line 3 has an insulating resin layer 32 on the outer circumference of the conductor 31. The material constituting the conductor 31 is not particularly limited, and for example, copper, aluminum, or alloys thereof can be used, but copper alloy wire is preferred, and among them, copper alloy wire containing 0.1 to 1.0% Sn is particularly preferred. Furthermore, by setting the tensile strength of the wire strand 31a, which is made of copper alloy wire, to 350-900 MPa, it becomes possible to obtain high repeated bending properties.
[0028] In this case, the conductor 31 of the power line 3 has a cross-sectional area of 0.5 to 4.0 mm². 2 Preferably, 1.0 to 3.5 mm 2 This is more preferable. Furthermore, the diameter of the strands 31a constituting the conductor 31 is preferably 0.05 to 0.5 mm, and more preferably 0.05 to 0.3 mm. Furthermore, the cross-sectional shape of the wire 31a may be circular (round wire) or rectangular (flat wire).
[0029] In this embodiment, as shown in Figure 4, the power line 3 also has a conductor 31 formed by twisting together multiple strands 31a. The number of strands 31a is not limited to two or more. Therefore, similar to the case of signal line 2 described above, the power line 3 itself becomes flexible, and when repeated bending forces are applied to the composite cable 1, the power line 3 itself stretches, making it less likely for breakage to occur. Thus, by constructing the conductor 31 of the power line 3 by twisting together multiple strands 31a, it is possible to improve the flexibility and repeated bending resistance of the composite cable 1.
[0030] Furthermore, if the twist pitch (the distance from one arrangement of stranded wires to the next identical arrangement) of the stranded wires 21a and 31a that make up the conductors 21 and 31 of the signal line 2 and power line 3 becomes too narrow, the stranded wires (signal line 2 and power line 3) will become stiff, their flexibility will decrease, making them difficult to bend and reducing their ability to be repeatedly bent. In addition, problems such as an increase in the diameter of the conductors 21 and 31 may occur. Furthermore, if the twisting pitch of the strands 21a and 31a becomes too wide, the signal line 2 and power line 3 will be close to being untwisted, and the benefits of twisting the strands 21a and 31a to improve flexibility and repeated bending will not be obtained.
[0031] Therefore, it is desirable to set the twist ratio of strands 21a and 31a to an appropriate value. In this case, the twist ratio is defined as the ratio of the lengths of the extracted strands 21a and 31a to the length of the extracted strands 21a and 31a, obtained by cutting a piece of the completed composite cable 1 and measuring the length of the cut piece of composite cable 1.
[0032] According to the inventors' research, the twist ratio of the strands 21a and 31a constituting the conductors 21 and 31 of the signal line 2 and power line 3 is preferably 1.03 to 1.07, and more preferably 1.04 to 1.06. Furthermore, "a twist ratio of 1.03 to 1.07 for strands 21a and 31a" means that the length of the strands 21a and 31a of the signal wires 2 and power wires 3 extracted by disassembling the cut composite cable 1 is 3 to 7% longer than the length of the cut composite cable 1.
[0033] With this configuration, it becomes possible to improve the flexibility and repeated bending resistance of the composite cable 1 without unnecessarily increasing the electrical resistance or degrading the signal in the signal line 2 or power line 3. The twist ratio of the strands 31a can be adjusted by the twist pitch of the conductor 31, the twist pitch of the signal line 2 and power line 3 (described later), and the outer diameter of each wire (strands 21a, 31a, signal line 2, power line 3).
[0034] Furthermore, in this embodiment, as shown in Figure 5(a), the twisted signal lines 2 and power lines 3 are further twisted together inside the composite cable 1. Therefore, the overall flexibility of the twisted signal wires 2 and power wires 3 is improved, and when repeated bending forces are applied to the composite cable 1, the signal wires 2 and power wires 3 stretch as a whole, making it less likely for breaks or other damage to occur in the signal wires 2 and power wires 3.
[0035] Therefore, by further twisting the signal line 2 and power line 3 together, it becomes possible to improve the overall flexibility and repeated bending resistance of the composite cable 1. Note that Figure 5(a) shows the case where the composite cable 1 has 4 cores (see Figure 2), but the same applies to other configurations. For example, in the case of 6 cores as shown in Figure 3, it will look like Figure 5(b).
[0036] In the composite cable 1 according to this embodiment, as described above, the signal line 2 and the power line 3 themselves are constructed by twisting together individual wires 21a and 31a (see Figure 4), the signal lines 2 are twisted together (see Figures 2 and 5(a) and (b)), and the signal line 2 and the power line 3 are twisted together as a whole (see Figures 5(a) and (b)). The repeated bending of the composite cable 1 is improved by the twisted structure of the signal line 2 and the power line 3.
[0037] On the other hand, when comparing signal line 2 and power line 3, the influence of the higher repeated bending capacity of power line 3, which is thicker than signal line 2, on the repeated bending capacity of composite cable 1 is greater. Furthermore, in this invention, the power supply wire 3 is configured to be repeatedly bendable by twisting together the strands 31a of the power supply wire 3 as described above.
[0038] However, if the conductor 31 (wire strands 31a) is densely packed within the resin layer 32, the power supply wire 3 becomes stiff and difficult to bend, which can reduce the repeated bending resistance of the power supply wire 3 itself. Furthermore, the degree of density of the strands 31a in the power line 3 can be expressed as the occupancy rate α of the air gaps in the conductor 31 in the cross-section of the power line 3, and the air gap occupancy rate α can be calculated by the following method.
[0039] In other words, the cross-sectional area of the internal part A (see the dotted area in Figure 6) of the resin layer 32 of the power line 3, from which the conductor 31 has been removed, is determined using a microscope capable of measuring the area. Note that the area indicated by the dot in Figure 6 represents the internal part A of the power line 3 and does not indicate the presence of any object such as a conductor there. Then, the cross-sectional area of the conductor 31 is calculated based on the configuration of the conductor 31 (the cross-sectional area and number of individual strands 31a). α = (Cross-sectional area of the internal part - Cross-sectional area of the conductor) / (Cross-sectional area of the internal part) × 100 [%] By calculating this, the occupancy rate α of the air gaps in the conductor 31 in the cross-section of the power line 3 can be calculated.
[0040] Furthermore, if the void occupancy rate α is too small (i.e., if the conductor 31 is densely packed within the resin layer 32), the power supply line 3 becomes stiff, potentially reducing the repeated bending ability of the power supply line 3 itself. Conversely, if the void occupancy rate α is too large, that is, if the conductor 31 is loosely packed within the resin layer 32, the repeated bending of the power line 3 itself may increase. However, as the composite cable 1 bends, the radial stress on the resin layer 32 of the power line 3 causes excessive shape changes, which may damage the resin layer 32 of the power line 3.
[0041] Therefore, our research has shown that it is preferable for the occupancy rate α of the conductor 31 in the cross-section of the power line 3 to be 26-40%. Furthermore, if the resin layer 32 of the power wire 3 is too hard, the repeated bending ability of the power wire 3 itself will decrease. However, if it is too soft, problems such as damage to the resin layer 32 will occur when the power wire 3 is repeatedly bent, as described above. Therefore, it is preferable that the tensile modulus of the resin layer 32 of the power wire 3 be 150 to 1000 MPa. The tensile modulus can be determined according to JIS K 7161-1. When measuring the tensile modulus of the insulation (resin layer 32) of the power wire, a tubular test piece of the insulation is taken from the power wire and measured according to JIS C 3005 (Tensile properties of insulators and sheaths). The length of the test piece is approximately 150 mm, and markings are made in the center at intervals of 50 mm.
[0042] As described above, according to the composite cable 1 of this embodiment, the strands 21a and 31a constituting the conductors 21 and 31 of the signal line 2 and power line 3 are twisted together, two or more signal lines 2 are twisted together, and the signal line 2 and power line 3 are further twisted together as a whole. Furthermore, the power line 3 was configured such that the occupancy rate α of the air gaps in the conductor 31 in the cross-section was 26-40%.
[0043] Therefore, the twisted structure of the signal line 2 and power line 3 makes it possible to improve the repeated bending properties of the composite cable 1, and by keeping the air occupancy rate α within the above range, the repeated bending properties of the power line 3 itself are improved, thereby further improving the repeated bending properties of the composite cable 1. Furthermore, as shown in the examples described later, the composite cable 1 according to this embodiment exhibits excellent repeated bending properties not only at room temperature but also at low temperatures.
[0044] Here, we will describe the tests performed on the composite cable 1 according to this embodiment (Examples 1 to 4) and composite cables with other configurations (Comparative Examples 1 to 5) regarding repeated bending and other properties.
[0045] [Create signal lines] A conductor was fabricated by twisting together strands of copper alloy wire containing 0.3% Sn, each with a diameter of 0.08 mm. This conductor was then extruded using polyethylene (Sumikasen CU5003 (manufactured by Sumitomo Chemical)) to achieve an outer wire diameter of 1.4 mm and a resin layer thickness of 0.35 mm. Subsequently, a crosslinking process was performed by irradiating the resin layer with a 750 keV, 8 Mrad electron beam to crosslink the resin layer and obtain a signal wire.
[0046] [Creating power lines] A conductor was fabricated by twisting together strands of copper alloy wire containing 0.15% Sn, each with a diameter of 0.08 mm. This conductor was then extruded using polyethylene (Sumikasen CU5003 (manufactured by Sumitomo Chemical)) to achieve an outer wire diameter of 2.6 mm and a resin layer thickness of 0.45 mm. Subsequently, a crosslinking process was performed by irradiating the resin layer with a 500 keV, 8 Mrad electron beam to obtain a power wire.
[0047] [Cable core] The resulting signal wires were twisted together in pairs, and the resulting twisted signal wires were further twisted together with the two power wires to create a cable core.
[0048] [Creating a composite cable] The obtained cable core was extruded using a material made of flame-retardant crosslinked polyurethane, a polyurethane-based resin, to form a sheath layer around the cable core with an outer diameter of 8.3 mm. Subsequently, a crosslinking process was performed by irradiating the sheath layer with an 800 keV, 12 Mrad electron beam to crosslink the sheath layer and obtain a composite cable.
[0049] Furthermore, the composite cables fabricated as described above were subjected to the following three types of bending tests. Figure 7 is a schematic diagram of the apparatus used in the following bending tests 1 to 3, viewed from the axial direction of the mandrel.
[0050] <Bending Test 1> As shown in Figure 7, the fabricated cable 100 was passed vertically between two mandrels 51 and 52 that were arranged horizontally and parallel to each other, and between anti-sway retainers 61 and 62, and a weight (not shown) was attached below the composite cable 100. Then, in this state, the upper end of the composite cable 100 was bent (repeatedly alternating between left and right) so that it alternately contacted the upper outer circumference of either the left or right mandrel 51 or 52. The number of bends was counted as one time each time the composite cable 100 was bent to contact the outer circumference of either the left or right mandrel 51 or 52.
[0051] The test conditions were as follows: mandrel diameter 15 mm, bending angle 90° left and right, bending speed 60 bends / min, weight 500 g, clearance between composite cable and mandrel 1 mm, bending length adjusted so that the upper side of composite cable 100 was in contact with the upper outer circumference of each mandrel, and the test was conducted in a 25°C atmosphere. The composite cables were connected in series in a loop shape and energized, and the number of bends until breakage occurred was measured.
[0052] The evaluation was based on which of the following criteria the number of bends before the first break in the power or signal wires fell into. "○" and "△" were considered passing grades, while "×" was considered a failing grade. ○: Over 100,000 times △: More than 50,000 times, less than 100,000 times ×: Less than 50,000 times
[0053] <Bending Test 2> Bending Test 2 is a more severe test, similar in content to Bending Test 1 described above, but with a mandrel diameter of 8 mm. The evaluation was based on which of the following criteria the number of bends before the first break in the power or signal wires fell into. "○" and "△" were considered passing grades, while "×" was considered a failing grade. ○: Over 100,000 times △: More than 50,000 times, less than 100,000 times ×: Less than 50,000 times
[0054] <Bending Test 3> A bending test was conducted at extremely low temperatures. The test procedure was the same as for bending tests 1 and 2 described above, but the test was conducted in an atmosphere of -40°C. The evaluation was based on which of the following criteria the number of bends before the first break in the power or signal wires fell into. "○" and "△" were considered passing grades, while "×" was considered a failing grade. ○: Over 100,000 times △: More than 50,000 times, less than 100,000 times ×: Less than 50,000 times
[0055] Table I shows the results of performance evaluations regarding the bending resistance of various composite cables that were fabricated. Table I lists the results of the bending tests 1-3 described above as bending resistance 1-3, respectively. Furthermore, while Table I indicates whether power lines are twisted or not as "yes" or "no," due to manufacturing constraints, it is difficult to completely avoid twisting. Therefore, the case of "no" in Table I includes cases where the twisting is sufficiently small.
[0056] [Table 1]
[0057] In Examples 1-4, good results were obtained for all three bending resistance parameters (1-3). That is, good results were obtained under normal conditions, more severe bending conditions, and cryogenic conditions.
[0058] On the other hand, in Comparative Example 1, the occupancy rate α of the conductor's air gaps in the cross-section of the power line was set to 55%. However, the air gap occupancy rate α was too large, causing damage to the resin layer of the power line with repeated bending in all of the bending tests 1 to 3. As a result, the power line broke after a relatively small number of bends, indicating poor repeated bending resistance. Furthermore, in Comparative Examples 2-5, the power lines, signal lines, pairs of signal lines, and the power lines and signal lines as a whole were not twisted together. However, in all of these cases, breakage occurred in the power lines and signal lines after a relatively small number of bends in at least Bending Test 2 (more stringent bending conditions) and Bending Test 3 (cryogenic conditions), indicating poor repeated bending resistance.
[0059] It goes without saying that the present invention is not limited to the embodiments described above, and can be modified as appropriate without departing from the spirit of the invention. For example, Figures 2 and 3 show the case where only one sheath layer 4 is formed, but it is also possible to form the sheath layer 4 as multiple layers.
[0060] Furthermore, since the area inside the vehicle where the composite cable 1 is located may become relatively hot, it is also possible to configure the sheath layer 4 of the composite cable 1 (or any of the multiple sheath layers 4), as well as the resin layers 22, 32 of the signal lines 2 and power lines 3, etc., to be made of heat-resistant resin or the like. [Explanation of Symbols]
[0061] 1. Composite Cable 2 signal lines 3 Power line 11 sensors 12 Control devices 13 Control Devices 14 Actuators 21 Conductor 21a Bare wire 22 Resin layer 31 Conductor 31a Bare wire 32 resin layer α void occupancy
Claims
1. In all cases, the composite cable comprises multiple signal lines and multiple power lines, each having a resin layer on the outer circumference of the conductor, The signal line is thinner than the power line. The strands that make up the conductor of the signal line are twisted together. The strands that make up the conductor of the power line are twisted together. Two or more of the aforementioned signal lines are further twisted together. The signal line and the power line are further twisted together. The occupancy rate of the conductor's air gaps in the cross-section of the power line is 26 to 40%. A composite cable characterized in that the stranding ratio of the strands constituting the conductor of the power line is 1.03 to 1.
07.
2. The composite cable according to claim 1, characterized in that the tensile modulus of the resin layer of the power line is 150 to 1000 MPa at (23±2)°C.
3. The composite cable according to claim 1 or 2, characterized in that the plurality of power lines include power lines for vehicle brake control.
4. The composite cable according to any one of claims 1 to 3, characterized in that the plurality of power lines include power lines that supply power from an electric parking brake control device to an actuator, and the plurality of signal lines include signal lines for transmitting signals from sensors of an anti-lock brake system to a control device.