JP2018181488A - Unit cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a unit cable which can form a circuit between cables having multiple pieces of lead wire freely and can improve recyclability.SOLUTION: A unit cable 1 comprises multiple cables 2 having multiple pieces of lead wire 21 inside, and a cable protect component 3 burying buried part 24 of the cable 2 and having insulating property. The buried part 24 of the cable 2 is formed by including end 2a of the cable 2, and a connecting part 25 are formed by connecting the pieces of lead wire 21 electrically at end 21a of the exposed lead wire 21. The pieces of lead wire 21 forming each connecting part 25 are bound at a weld zone 21b that the pieces of lead wire 21 are at least partially joined together by welding process such as resistance welding.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a unit cable.

  Conventionally, an electrical wiring system in which electrical wiring circuits required in a factory are connected in advance, connection parts are aggregated, and cable branch connection processing is preassembled in advance, mainly for the purpose of labor saving in indoor wiring work, So-called unit cables are known. The unit cable described above uses a cable having a plurality of conductors as core wires, such as a two- or three-core flat cable (VVF cable). The above-described connection portion formed on each VVF cable exposes the conductor to the outside of the cable in a part of the extending direction of each VVF cable, and electrically exposes the exposed conductors among the plurality of VVF cables. It is connected and formed. For example, in Patent Document 1, a plurality of three-core flat cables (VVF cables) are bundled, and a plurality of connection parts provided halfway along the extension direction of the VVF cables are collected in the cable protection part (mold part). Unit cables are disclosed.

JP, 2015-56327, A

  In the unit cable described above, the connection portion is provided midway in the extending direction of each VVF cable. That is, the plurality of conductors are electrically connected to each other on the way in the extending direction. As a method of electrically connecting the wires, a connecting member such as a tin-plated connector or a sleeve may be used. The connection members are put together on the respective conducting wires to be electrically connected, and the respective conducting wires are electrically connected by crimping.

  However, in the unit cable described above, since the connection portion is formed halfway in the extending direction of the conducting wire, a circuit having a switching function of current, such as a switch circuit, can not be configured, and the circuit can not be configured freely. There is room for improvement. Further, when the lead wires in the connection portion and the connection member are crimped, tin by tin plating adheres to the outer peripheral surface of the lead wire exposed to the outside. Therefore, when the unit cable is discarded, since the above-mentioned lead wire contains tin as an impurity, it is treated as a metal with low purity, and there is room for improvement in recyclability.

  The present invention has been made in view of the above, and it is an object of the present invention to provide a unit cable which can freely constitute a circuit between cables having a plurality of conducting wires and can improve recyclability.

  In order to achieve the above object, in a unit cable according to the present invention, a cable having a plurality of cables internally having a plurality of conducting wires, and a cable in which a buried portion at each end of the plurality of cables is buried and which has insulation properties A protective member, in the embedded portion, the ends of the plurality of the leads are exposed to the outside of the cable in the embedded portion, and the ends of the respective leads between the cables are electrically connected to each other The connecting portions are characterized in that the connecting portions are connected to each other in a welding portion in which at least a part of each of the conductive lines is connected.

  Preferably, the plurality of cables are adjacent to each other in the arrangement direction, and the plurality of embedded parts are embedded along the arrangement direction with respect to the cable protection member.

  Preferably, the plurality of cables are radially adjacent to each other along the outer circumferential surface of the cable protection member, and the plurality of buried portions are buried annularly with respect to a central portion of the cable protection member.

  A unit cable according to the present invention is embedded in a cable protection member, and has a connection portion in which a plurality of exposed leads are electrically connected between the cables in the embedded portion including the end of the cable, And, since the connecting portions are formed by connecting the conducting wires to each other in the welded portion where at least a part of the electrically connected conductors are joined, the circuit can be configured freely between the cables having a plurality of conducting wires At the same time, the recyclability can be improved.

FIG. 1 is a front view of a unit cable according to the present embodiment. FIG. 2 is an enlarged view of a main part of a unit cable according to the present embodiment. FIG. 3 is an assembly explanatory view of a unit cable according to the present embodiment. FIG. 4 is a perspective view of a unit cable according to a modification. FIG. 5 is a front view of a unit cable according to a modification. FIG. 6-1 is a partial view of a unit cable according to a modification. 6-2 is a partial view of a unit cable according to a modification. 6-3 is a partial view of a unit cable according to a modification.

  Below, the embodiment of the unit cable concerning the present invention is described in detail based on a drawing. The present invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily conceived by those skilled in the art or those that are substantially the same. Moreover, various omissions, replacements, and changes can be made to the components in the following embodiments without departing from the scope of the invention.

[Embodiment]
First, a unit cable according to the embodiment will be described. FIG. 1 is a front view of a unit cable according to the present embodiment. FIG. 2 is an enlarged view of a main part of a unit cable according to the present embodiment. FIG. 3 is an assembly explanatory view of a unit cable according to the present embodiment. Here, FIG. 2 is a view of a state in which the cable protection member is removed from the unit cable of FIG. FIG. 3 is a diagram when forming the connection part of the unit cable. The X direction in FIGS. 1 to 3 is the arrangement direction of the cables in the unit cable. The Y direction in FIGS. 1 to 3 is the cable extension direction of the cable, and is a direction orthogonal to the arrangement direction. The Z direction in FIGS. 1 to 3 (including FIGS. 4 and 5) is the vertical direction, and is a direction orthogonal to the arrangement direction and the cable extension direction. Moreover, it is the width direction in a cable.

  The unit cable 1 according to the present embodiment is used, for example, for wiring of cables in the indoor ceiling and is fixed to a rod-like member attached to the indoor ceiling, for the purpose of saving labor in indoor wiring work in a building. It is fixed to the ceiling, ie the building side. As shown in FIG. 1, the unit cable 1 includes a plurality of cables 2 and a cable protection member 3, performs branch wiring processing on the plurality of cables 2, and connects later-described connection portions 25 in these cables 2 It is integrated with the protective member 3 and is formed by pre-assembly (temporary assembly). That is, in the case of indoor wiring work, wiring of the plurality of cables 2 including the branch wiring is performed without the wiring worker performing the branch wiring work of the plurality of cables 2 at the installation site of the cable wiring such as indoor ceiling It is possible to do the work.

  The cable 2 is a flat cable having a plurality of core wires inside as shown in FIGS. 1 and 2. The cable 2 in the present embodiment is, for example, a "vinyl-insulated vinyl sheath cable flat type (VVF cable)" having a plurality of core lines such as three cores, and is formed flat by arranging the above core lines in one direction. Ru. The number of core wires of the cable 2 is not limited to three. In the unit cable 1 in the present embodiment, five cables 2 formed in the same manner are used. Each cable 2 has a plurality of conducting wires 21, an insulator 22, an exterior member 23, and a buried portion 24 inside.

  The plurality of conductive wires 21 are core wires in the cable 2. The conducting wire 21 is a metal wire (for example, a copper wire etc.) provided with conductivity and flexibility, and is formed in a circular shape in cross section. Each conducting wire 21 is formed identically. The conductors 21 are arranged in each cable 2 so that the extending directions of the conductors 21 coincide with each other. The conductors 21 in the present embodiment are arranged in the width direction of the cable 2, that is, in the vertical direction of the unit cable 1 inside the cable 2. In the end portion 2 a of the cable 2, the ends 21 a which are a part of the plurality of conducting wires 21 are exposed to the outside from the insulator 22.

  The insulator 22 covers the outer peripheral surfaces of the plurality of conducting wires 21 included in each cable 2 respectively. The insulator 22 is formed by injection molding a synthetic resin (for example, vinyl chloride or the like) on the outer peripheral surface side of the plurality of conducting wires 21. The insulator 22 has insulation and flexibility. That is, the insulator 22 can follow the conducting wire 21 and bend when the conducting wire 21 bends in the wiring operation. The insulators 22 are colored in different colors, such as black, white, red, etc., corresponding to the plurality of conducting wires 21. As a result, the plurality of conducting wires 21 can be distinguished visually, and wiring, connection errors and the like at the time of wiring can be prevented. A part of the insulator 22 corresponding to each of the conducting wires 21 is exposed to the outside from the exterior member 23 at the end 2 a of the cable 2.

  The exterior member 23 is provided on the outermost shell of the cable 2 and is a so-called sheath. The exterior member 23 covers the radially outer side of each of the conducting wires 21 covered with the insulators 22 arranged in the width direction, thereby integrating the plurality of conducting wires 21 into one cable. The exterior member 23 is formed by injection molding a synthetic resin (for example, vinyl chloride or the like) on the radially outer side, ie, the outer peripheral surface side, of the lead 21 covered with the insulators 22 arranged in the width direction. The exterior member 23 is formed in an oval shape in cross section. The exterior member 23 has insulation and flexibility. That is, the exterior member 23 can follow and bend when the flexible lead 21 and the insulator 22 are bent.

  The buried portion 24 is an end 2 a of each cable 2 and is buried in the cable protection member 3. The plurality of embedded portions 24 in the present embodiment are embedded in the cable protection member 3 along the arrangement direction. Here, in the end portion 2a of each cable 2, a part of the exterior member 23 is cut away so that the lead wire 21 and the insulator 22 protrude from the exterior member 23, and a part of the insulator 22 is cut away. Conductors 21 project from insulator 22. That is, the embedded portion 24 includes the exterior member 23 at the end 2 a of the cable 2, the insulator 22 exposed from the exterior member 23, and the end 21 a of the conducting wire 21 exposed from the insulator 22. It has a part 25.

  The connection portion 25 electrically connects the end portions 21 a of the respective conducting wires 21 among the cables 2 among the end portions 21 a of the respective conducting wires 21 exposed to the outside of the respective cables 2 in the embedded portion 24. . The connection part 25 is a connection part for branch wiring of the cable 2 in the unit cable 1, and multiple connection parts are provided. There are various electrical connection methods between the end portions 21a of the leads 21. In the present embodiment, the ends 21a of the leads 21 to be connected are sandwiched between two electrodes to flow a large current, and the electrical resistance of the leads 21 is increased. The resistance welding method is used in which at least a part of the end 21a of the lead 21 is melted and physically adhered and joined by using the resistance heat generated by the above and the pressing force with which the electrode sandwiches and presses the lead 21. As shown in FIG. 3, in the welded portion 21 b joined at least in part at the end 21 a of the lead wire 21, the connection portion 25 is formed by connecting the lead wires 21 to each other. In addition, the number of the conducting wire 21 which comprises the connection part 25 is not limited, For example, not only 2 but according to the circuit structure requested | required, 3 or more may be sufficient.

  In the present embodiment, as shown in FIG. 2, cross wires 26 are provided between the connection portions 25 and electrically connect the connection portions 25. The cross wire 26 is the same lead as the lead 21, and both ends thereof are electrically connected to the end 21 a of the lead 21 constituting each connecting portion 25. By electrically connecting the connection portions 25 to each other, the cross-wires 26 can electrically connect the number of conductors 21 of the number equal to or greater than the number of the conductors 21 which can be electrically connected by one connection portion 25. Therefore, the free circuit configuration of the cable 2 in the unit cable 1 can be enabled as compared with a circuit configured by having a plurality of single connection portions 25 not connected to other connection portions 25. It is. Plural wires 26 are provided in accordance with the required circuit configuration of the cable 2.

  In the present embodiment, the insulating cap 10 may be attached to the connecting portion 25 in order to prevent a short circuit between the connecting portions 25. The insulating cap 10 is a cylindrical synthetic resin (for example, vinyl chloride or the like) having an insulating property, and prevents the contact between the connection parts 25 by inserting the connection part 25 inside. .

  The cable protection member 3 embeds the embedded portion 24 of each cable 2 in the unit cable 1 along the arrangement direction and protects the connection portion 25 included in the embedded portion 24 from external loads. is there. Further, the cable protection member 3 is for collecting a plurality of connection portions 25 in the cable 2. The cable protection member 3 is a synthetic resin having an insulating property, and surrounds the end portion 2 a side of the cable 2, that is, the connection portion 25 in a state where the plurality of cables 2 are arranged adjacent to each other in the arrangement direction. It is formed. The cable protection member 3 in the present embodiment is integrally formed with the cable 2 by embedding a part including the connection portion 25 of the cable 2 in the synthetic resin constituting the cable protection member 3 by insert molding. The cable protection member 3 is formed such that the width direction of the cable 2 and the vertical direction of the cable protection member 3 coincide with each other. The length in the vertical direction of the cable protection member 3 is longer than the length in the width direction of the cable 2. The cable protection member 3 has a substantially rectangular outer shape when viewed in the vertical direction. The cable protection member 3 projects a plurality of cables 2 from one end. The cable protection member 3 has a protrusion 31.

  The protrusion 31 is provided with an attachment hole 31 a for fixing the unit cable 1 to an indoor ceiling or the like. The protruding portion 31 is formed on the outer peripheral surface of the cable protection member 3 so as to protrude in the extending direction from the end on the side where the cable 2 protrudes and the end on the opposite side in the extending direction. The protrusion 31 is formed such that the length in the vertical direction is the same as the length in the vertical direction of the cable protection member 3. The mounting holes 31 a are formed to penetrate both surfaces of the protrusion 31 in the vertical direction. The mounting hole 31a is formed so as to be able to penetrate a rod-like member to which the indoor ceiling portion and one end are fixed.

  Next, an example of a method of assembling the unit cable 1 will be described with reference to FIGS. 2 and 3. First, at the end 2 a in the extension direction of each cable 2, the worker cuts out the exterior member 23 and peels it off, and exposes the insulator 22 covered by the conducting wire 21 to the outside of the cable 2. Next, the worker peels off the insulator 22 at the end in the extending direction with respect to each of the exposed insulators 22 and exposes the conductive wires 21 to the outside of the cable 2.

  The formation of the connecting portions 25 for the respective conducting wires 21 is performed by the resistance welding device 100 as shown in FIG. The resistance welding apparatus 100 includes a base (not shown) on which the plurality of cables 2 are placed, and a pair of electrodes 101 for causing current to flow to the end portions 21a of the plurality of conducting wires 21 brought into contact during welding. The pair of electrodes 101 are disposed on a straight line apart from each other, and are supported movably in directions approaching to each other and in directions away from each other on the straight line. The pair of electrodes 101 are located at standby positions separated from each other in the standby state of the resistance welding device 100, and approach each other by an electrode driving mechanism (not shown) of the resistance welding device 100 when welding by the resistance welding device 100. To move.

  First, the worker installs the plurality of cables 2 on the base, and the base is not shown so that the ends 21a of the plurality of conducting wires 21 to be welded are positioned between the pair of electrodes 101 in the standby position. Activate the drive mechanism. Next, the worker operates the electrode drive mechanism to move the pair of electrodes 101 so as to approach each other. At this time, the pair of electrodes 101 come into contact with the end portions 21 a of the plurality of conducting wires 21 and bring the end portions 21 a of the plurality of conducting wires 21 into contact with each other by approaching each other. Next, the worker applies a current indicating a large current value to which the conducting wire 21 can be melted while pressing the pair of electrodes 101 in a direction approaching each other so as to keep the plurality of conducting wires 21 in contact with each other. As a result, the current flows in the plurality of conducting wires 21, and resistance heat is generated in accordance with the electrical resistance of the metal forming the conducting wires 21. The resistance heat melts the end 21a of the conducting wire 21, and the melted portions of the end 21a of the plurality of conducting wires 21 are physically adhered and bonded to each other to form a welded portion 21b and form the connecting portion 25. Be done.

  Next, the worker forms the connection portions 25 of the number corresponding to the circuit configuration required for the cable 2 by the resistance welding device 100, and removes the cable 2 on which each connection portion 25 is formed from the resistance welding device 100. After covering each connecting portion 25 with the insulating cap 10, the connecting portion 25 is installed in an injection molding machine (not shown). At this time, the worker installs the cable 2 on the insert mold so that the portion to be the embedded portion 24 including the connection portions 25 is positioned inside the insert mold. Next, when the worker operates the injection molding machine, the synthetic resin flows in the insert mold, the cable protection member 3 is formed around the cable 2, and the embedded portion 24 is embedded in the cable protection member 3 It becomes a state. Thereby, the cable 2 is preassembled into the cable protection member 3 and the assembly operation of the unit cable 1 is completed.

  The unit cable 1 in this embodiment includes the end portions 2a of the plurality of cables 2 and the embedded portion 24 is formed, and the end portions 21a of the plurality of conducting wires 21 exposed to the outside in the embedded portion 24 are electrically connected between the cables A plurality of connection parts 25 connected in a common manner are formed. In the configuration in which the connection portion 25 is formed halfway in the extending direction of the conducting wire 21, for example, in the plurality of cables 2 arranged in the arranging direction, the conducting wire 21 between the cables on both sides in the arranging direction for the required circuit configuration. In the case of electrically connecting them, it is difficult to secure the length for drawing the conducting wire 21 in the arrangement direction in the middle of the extending direction because the conducting wire 21 is drawn in the arranging direction in the middle of the extending direction. It is difficult to prevent a short circuit with the other conducting wire 21 while routing in the arrangement direction. On the other hand, unit cable 1 is separated in the arranging direction, such as conducting wire 21 between cables 2 on both sides in the arranging direction, because end 21a of conducting wire 21 is a free end. Even the lead wire 21 located can be freely electrically connected, and since the lead wires 21 to be electrically connected can be freely selected, the circuit in the unit cable 1 can be freely configured. it can. Further, the connection portion 25 is formed at the end 21 a of the conducting wire 21, whereby the switch mechanism is provided inside the cable protection member 3 to connect or interrupt the conducting wires 21 or to connect to one conducting wire 21. The switch circuit which selects the conducting wire 21 can be configured.

  Further, in the unit cable 1, the electrical connection between the conductive wires 21 at the connection portion 25 is formed by resistance welding. That is, the connection portion 25 is formed by physically connecting the conducting wires 21 to each other in the welding portion 21b where at least a part of the contacting portions is joined by supplying a current in a state where the end 21a of the conducting wire 21 is in contact. Be done. Therefore, as compared with a configuration in which a connection part is formed by pressure bonding a connection part containing another metal such as tin, the connection part 25 is formed only with the metal constituting the conductive wire 21, and impurities other than the above metal Since it can suppress including, when discarding the unit cable 1, when recycling the conducting wire 21, it can be handled as a metal with high purity. Moreover, since the connection part 25 can be made small because connection parts are not used, the unit cable 1 can be miniaturized.

  As described above, in the unit cable 1, the circuit can be freely configured between the cables having the plurality of conducting wires 21, and the recyclability can be improved.

  Further, in the unit cable 1 in the present embodiment, for example, after the unit cable 1 is mounted at a height, the plurality of cables 2 project from one end of the cable protection member 3, that is, project in the same direction. When arranging each cable 2, the wiring work of each cable 2 can be easily performed by setting the protruding direction of each cable 2 downward.

  Further, in the configuration in which metallic bus bars are passed between the conducting wires 21 as connecting parts, the bus bars do not have as flexibility as the conducting wires 21. Therefore, the bus bar forming direction and the arranging direction of the conducting wires 21 are matched. In some cases, multiple bus bars are required. On the other hand, the connecting portion 25 of the unit cable 1 connects the conducting wires 21 by welding, and the conducting wire 21 has flexibility and can be freely routed according to the required circuit configuration. Not only can it be configured freely but also the embedded portion 24, ie, the cable protection member 3 can be miniaturized, so that the unit cable 1 can be miniaturized.

  Although the unit cable 1 in the present embodiment is configured to cover the connection portion 25 with the insulation cap 10, the insulation cap 10 may not be used if the non-contact state between the connection portions 25 can be secured. The unit cable 1 is formed by performing insert molding in which the cable protection member 3 embeds the embedded portion 24. Therefore, when installing the cables 2 in the injection molding machine, the cables 25 are protected around the connectors 25 and the conductors 21 exposed to the outside by installing the connectors 25 separately and performing injection molding. Since a synthetic resin having an insulating property, which is a member constituting the member 3, is interposed, a short circuit in the connection portion 25 can be prevented.

[Modification]
Next, modifications of the unit cable 1 according to the embodiment will be described. FIG. 4 is a perspective view of a unit cable according to a modification. FIG. 5 is a front view of a unit cable according to a modification. 6-1 to 6-3 are partial views of a unit cable according to a modification. Here, FIG. 6-1, FIG. 6-2, and FIG. 6-3 are figures which show the connection part in a unit cable. The unit cable 1 according to the modification differs from the unit cable 1 according to the embodiment in the arrangement direction of the cables 2 with respect to the cable protection member 3. In addition, the duplicate description is abbreviate | omitted as much as possible about the structure in common with embodiment mentioned above, an effect | action, and an effect.

  As shown in FIGS. 4 and 5, the cable protection member 3 in the modification is formed in a substantially circular shape when viewed in the vertical direction, and is formed extending in the vertical direction. That is, the cable protection member 3 in the modification is formed in a cylindrical shape. The length of the cable protection member 3 in the vertical direction is formed slightly larger than the width direction of the cable 2. The cable protection member 3 includes a protrusion 31 that protrudes radially outward from a part of the outer periphery when viewed in the vertical direction. The length in the vertical direction of the protrusion 31 is formed to be the same length as the length in the vertical direction of the outer peripheral surface 32 around the vertical direction of the cable protection member 3 when viewed from the circumferential direction. An attachment hole 31 a is formed in the protrusion 31.

  The cable 2 is embedded in the cable protection member 3 from the outer peripheral surface 32 around the vertical direction of the cable protection member 3. The cables 2 are arranged adjacent to each other in the circumferential direction, ie, radially, along the outer circumferential surface 32 with respect to the cable protection member 3. Therefore, the plurality of buried portions 24 are buried in an annular shape with respect to the cable protection member 3.

  The end 21 a of the lead 21 in the cable 2 is disposed toward the center of the cable protection member 3 because the embedded portion 24 is annularly positioned relative to the cable protection member 3. Therefore, the conductors 21 forming the connection portion 25 can freely select each conductor 21 in the radially arranged cables 2, and for example, the conductors 21 are radially separated, that is, the conductors 21 are separated in the circumferential direction. Can also be electrically connected at the end 21a. For example, as shown in FIG. 6A, in the connection portion 25, when the end portions 21 a of the conductive wires 21 of the adjacent cables 2 are connected to the cable protection member 3, the conductive wires 21 form an acute angle. The connection portion 25 is, for example, as shown in FIG. 6B, when the end portions 21a of the conductive wires 21 of the cable 2 located substantially in the radial direction are connected to the cable protection member 3, The angles become obtuse, and the two conductors 21 become substantially straight, and the connection 25 is formed therebetween. Also, for example, as shown in FIG. 6-3, the connection portions 25 connect the end portions 21a of the conductors 21 of the four cables 2 that are spaced apart substantially at equal intervals with respect to the cable protection member 3. In the case, the adjacent conducting wires 21 are substantially perpendicular to each other, and the connecting portion 25 is formed at the center of the four conducting wires 21.

  The unit cables 1 in the modification are installed in the central portion of the wiring space when the distribution space of the cables 2 is wide since the plurality of cables 2 are adjacent to each other radially along the outer peripheral surface 32 of the cable protection member 3 Thus, the plurality of cables 2 can be routed to any position of the wiring space. Thereby, the arrangement of the cable 2 and the versatility of the unit cable 1 can be improved. Also, as compared with the case where the plurality of cables 2 project from one end of the cable protection member 3, that is, in the same direction, the cables 2 are bent to arrange the cables 2 at arbitrary positions. Can be suppressed, and deterioration in the durability of the cable 2 can be suppressed.

  In the unit cable 1 according to the present embodiment and the modification, the electrical connection between the conductive wires 21 is welded by the resistance welding method, but the present invention is not limited thereto. For example, welding may be performed by welding using ultrasonic waves, a laser, thermocompression bonding or the like, or diffusion bonding. In any case, a welded portion in which at least a part of the conducting wires 21 is joined is formed to form a connecting portion, so that a circuit can be freely configured between cables having a plurality of conducting wires. In addition, even when the conducting wires are welded using the above-described method, it is possible to electrically connect the conducting wires 21 with only the metal that constitutes the conducting wire 21 without the need for connecting parts, thus improving the recyclability. Can.

DESCRIPTION OF SYMBOLS 1 Unit cable 2 Cable 2a end 21 Conductor 21a End 21b Welding part 22 Insulator 23 Exterior member 24 Buried part 25 Connection part 26 Crossed wire 3 Cable protection member 100 Resistance welding device 101 Electrode

Claims (3)

A plurality of cables having a plurality of conductors inside;
And a cable protection member having an insulating property, in which a buried portion at each end of the plurality of cables is buried.
The cable is
In the embedded portion, the ends of the plurality of the leads are exposed to the outside of the cable, and the connection portion electrically connects the ends of the respective leads between the cables.
The connection is
In the weld where at least a portion of each of the leads is joined, the leads are connected to each other,
Unit cable characterized by The plurality of cables are adjacent to each other in the arrangement direction,
The unit cable according to claim 1, wherein the plurality of embedded portions are embedded along the arrangement direction with respect to the cable protection member. The plurality of cables are radially adjacent to each other along the outer peripheral surface of the cable protection member,
The unit cable according to claim 1, wherein the plurality of embedded parts are embedded in a ring shape with respect to a central portion of the cable protection member.

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