WO2019035386A1 - Connection structure of conductive member and method for manufacturing connection structure of conductive member - Google Patents

Connection structure of conductive member and method for manufacturing connection structure of conductive member Download PDF

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Publication number
WO2019035386A1
WO2019035386A1 PCT/JP2018/029515 JP2018029515W WO2019035386A1 WO 2019035386 A1 WO2019035386 A1 WO 2019035386A1 JP 2018029515 W JP2018029515 W JP 2018029515W WO 2019035386 A1 WO2019035386 A1 WO 2019035386A1
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WIPO (PCT)
Prior art keywords
connection structure
conductive members
bonding
conductive member
conductive
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Application number
PCT/JP2018/029515
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French (fr)
Japanese (ja)
Inventor
中村　陽
鈴木　拓也
玉川　達男
大知 三浦
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住友電装株式会社
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Publication of WO2019035386A1 publication Critical patent/WO2019035386A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02—Soldered or welded connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables

Definitions

  • the present invention relates to a technique for ultrasonically bonding conductive members.
  • Patent Document 1 discloses a technique of integrating a plurality of exposed core segments in a plurality of coated wires by ultrasonic welding to form a splice.
  • Ultrasonic bonding is performed by applying ultrasonic vibration in a state of being pressed with a plurality of exposed core line segments interposed therebetween.
  • the part to be joined when the part to be joined is horizontally aligned with the pressing direction, the part to be joined vibrates in the same phase. For this reason, there is a possibility that bonding strength by ultrasonic bonding may be insufficient.
  • an object of the present invention is to enable ultrasonic bonding of a plurality of conductive members with a sufficient bonding force as much as possible.
  • connection structure of the electrically-conductive member which concerns on a 1st aspect is connected via the junction part with which the several electroconductive member was joined by ultrasonic bonding from multiple directions.
  • a second aspect is the connection structure of the conductive members according to the first aspect, wherein a plurality of sets are formed on the outer peripheral surface of the joint so that the receiving surface of the anvil and the pressing surface by the sonotrode face in different directions. It is
  • a third aspect is the connection structure of the conductive members according to the first or second aspect, wherein each of the plurality of conductive members is a collection of a plurality of strands.
  • a fourth aspect is a connection structure of conductive members according to any one of the first to third aspects, wherein each of the plurality of conductive members is exposed in a wire including a core wire and a coating covering the core wire It is considered to be a core wire.
  • a fifth aspect is the connection structure of conductive members according to any one of the first to fourth aspects, wherein the plurality of conductive members are three or more joined via the common joint portion.
  • the conductive member is included.
  • a sixth aspect is a connection structure of conductive members according to any one of the first to fifth aspects, wherein the bonding portion is formed by ultrasonic bonding from two directions in which the plurality of conductive members are orthogonal to each other. It is considered to be a formed part.
  • a seventh aspect is the connection structure of the conductive members according to any one of the first to sixth aspects, wherein the joint portion is formed in a shape having a square cross section.
  • connection structure manufacturing method of the conductive member concerning the 8th mode is the process of preparing (a) a plurality of conductive members, (b) a plurality of conductive members along the first direction Ultrasonic bonding in a pressurized state, and (c) ultrasonic bonding in a state in which a plurality of conductive members are pressed in a direction along a second direction different from the first direction. .
  • a ninth aspect is a method of manufacturing a conductive member connection structure according to the eighth aspect, wherein each of the plurality of conductive members is a collection of a plurality of strands.
  • a tenth aspect is a method of manufacturing a conductive member connection structure according to the eighth or ninth aspect, wherein in the step (a), three or more of the conductive members are prepared as the plurality of conductive members. In each of the step (b) and the step (c), the three or more conductive members are ultrasonically bonded.
  • An eleventh aspect is the connection member manufacturing method according to any one of the eighth to tenth aspects, wherein the second direction is perpendicular to the first direction. .
  • a twelfth aspect is the method for manufacturing a connection structure of conductive members according to any one of the eighth to eleventh aspects, wherein the bonding thickness dimension in the step (b) and the bonding thickness dimension in the step (c) Set to be the same.
  • the plurality of conductive members are bonded by ultrasonic bonding from a plurality of directions. For this reason, ultrasonic bonding can be performed on the plurality of conductive members with a sufficient bonding force as much as possible.
  • the joint is ultrasonically bonded from a plurality of directions. Are joined by For this reason, ultrasonic bonding can be performed on the plurality of conductive members with a sufficient bonding force as much as possible.
  • the respective strands are ultrasonically bonded from a plurality of directions, the respective strands can be ultrasonically bonded as firmly as possible.
  • the conductive member which is the core wire exposed in the electric wire including the core wire and the coating covering the core wire can be ultrasonically bonded with a sufficient bonding force as much as possible.
  • the direction in which the three or more conductive members are in contact tends to vary. Therefore, in the bonding portion, by using a configuration in which three or more conductive members are bonded via a common bonding portion by ultrasonic bonding from a plurality of directions, ultrasonic bonding is performed as strongly as possible to the three or more conductive members. it can.
  • the bonding portion is a portion where the plurality of conductive members are bonded by ultrasonic bonding from two directions orthogonal to each other, ultrasonic bonding is performed around the entire bonding portion by two ultrasonic bondings. It is easy to apply the power of time. For this reason, ultrasonic bonding can be performed on the plurality of conductive members with a sufficient bonding force as much as possible.
  • the bonding portion is formed in a square shape in cross section, settings and the like can be easily performed when ultrasonically bonding a plurality of conductive members from a plurality of directions.
  • the plurality of conductive members are joined by ultrasonic bonding from a first direction and a second direction different from the first direction. For this reason, ultrasonic bonding can be performed on the plurality of conductive members with a sufficient bonding force as much as possible.
  • the strands are ultrasonically bonded from a plurality of directions, the strands can be ultrasonically bonded as firmly as possible.
  • the direction in which the three or more conductive members are in contact tends to vary. Therefore, in the bonding portion, by using a configuration in which three or more conductive members are bonded via a common bonding portion by ultrasonic bonding from a plurality of directions, ultrasonic bonding is performed as strongly as possible to the three or more conductive members. it can.
  • the bonding portion is a portion where the plurality of conductive members are bonded by ultrasonic bonding from the first direction and the second direction orthogonal to each other, the periphery of the bonding portion is formed by two ultrasonic bondings. It is easy to apply the force at the time of ultrasonic bonding to the whole. For this reason, ultrasonic bonding can be performed on the plurality of conductive members with a sufficient bonding force as much as possible.
  • the bonding thickness dimension in the step (b) and the bonding thickness dimension in the step (c) are set to be the same.
  • ultrasonic bonding of a plurality of conductive members is performed from a plurality of directions. You can easily make settings etc.
  • connection structure of a conductive member It is a perspective view which shows the connection structure of a conductive member. It is the schematic of the ultrasonic bonding apparatus used for the connection structure manufacturing method of a conductive member. It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. It is an explanatory view showing an example of arrangement of a conductive member. It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member.
  • connection structure manufacturing method of an electrically-conductive member It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. It is an explanatory view showing an example of arrangement of a conductive member. It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. It is explanatory drawing which shows 1 process of the connection structure manufacturing method of the electrically-conductive member which concerns on a modification. It is explanatory drawing which shows 1 process of the connection structure manufacturing method of the electrically-conductive member which concerns on a modification. It is a perspective view which shows the connection structure of the electrically-conductive member which concerns on a modification. It is a perspective view which shows the connection structure of the electrically-conductive member which concerns on another modification. It is a perspective view which shows the connection structure of the electrically-conductive member which concerns on another modification.
  • connection structure of the conductive member and the connection structure manufacturing method of the conductive member according to the embodiment will be described.
  • FIG. 1 is a perspective view showing a connection structure 10 of a conductive member.
  • the connection structure 10 of the conductive member is configured such that a plurality of conductive members are connected via the bonding portion 30.
  • the electric wire 20 includes a core 22 and a sheath 24.
  • the core wire 22 is an assembly of a plurality of strands 23.
  • the wire 23 is a metal wire formed of aluminum, an aluminum alloy, copper, a copper alloy or the like.
  • the core wire 22 is in a form in which a plurality of strands are linearly gathered.
  • the core wire 22 is assumed to be a plurality of strands 23 twisted together.
  • the coating 24 is an insulating member that covers the periphery of the core wire 22.
  • the coating 24 is formed, for example, by extrusion coating a resin around the core wire 22.
  • a core wire is an aggregate of a plurality of strands
  • a strand is a braided wire braided cylindrically.
  • core wire 22 is an assembly of a plurality of strands 23, for example, core wire may be constituted by a single core wire.
  • the coating 24 be formed around the core wire 22 by extrusion coating, for example, the coating may be a heat-shrinkable tube which is heat-shrunk in a state of covering the periphery of the core wire.
  • the covering may be omitted.
  • the plurality of conductive members are core wires 22 of the two electric wires 20.
  • the coating 24 is removed, and the exposed core 22a is formed at the ends. With the ends of the two wires 20 facing each other, the exposed core wires 22a are overlapped.
  • the joined part 30 is formed by carrying out ultrasonic bonding of the part by which the exposed core wire 22a was put together.
  • the bonding portion 30 is a portion where the exposed core wire 22a is bonded by ultrasonic bonding from a plurality of directions. Here, two exposed core wires 22a are disposed in a superimposed manner. In the bonding portion 30, the two exposed core wires 22a are bonded to each other by ultrasonic bonding from the first direction D1. The two exposed core wires 22a are also joined by ultrasonic bonding from the second direction D2 different from the first direction D1.
  • the first direction D1 and the second direction D2 are directions orthogonal to the extending direction of the exposed core wire 22a, and the first direction D1 and the second direction D2 are different from each other.
  • the bonding direction in ultrasonic bonding is synonymous with the pressure direction in ultrasonic bonding based on the bonding portion 30.
  • FIG. 1 shows an example in which the overlapping direction of the two exposed core wires 22a is the first direction D1 and the direction orthogonal to this is the second direction D2.
  • a receiving surface 31 of an anvil formed in ultrasonic bonding in the first direction D1 and a pressing surface 32 by sonotroding are formed.
  • the object to be welded is sandwiched between the anvil and the sonotrode and pressurized, and ultrasonic vibration is applied from the sonotrode side.
  • the receiving surface 31 of the anvil is formed on one side in the overlapping direction of the two exposed core wires 22a among the outer peripheral surfaces of the joint portion 30, and the pressing surface 32 by sonotrode is formed on the other side.
  • the receiving surface 31 and the pressing surface 32 are portions directly pressed by the anvil or the sonotrode, and thus are formed in a surface shape corresponding to the contact surface of the anvil or the contacting surface of the sonotrode. It is assumed that the receiving surface 31 and the pressing surface 32 have a shape in which fine asperities are formed or a smooth shape according to the contact surface of the anvil or the contact surface of the sonotrode.
  • a receiving surface 33 of the anvil formed at the time of ultrasonic bonding in the second direction D2 and a pressing surface 34 by sonotroding are formed on the outer peripheral surface of the bonding portion 30, a receiving surface 33 of the anvil formed at the time of ultrasonic bonding in the second direction D2 and a pressing surface 34 by sonotroding are formed.
  • the receiving surface 33 and the pressing surface 34 have, like the receiving surface 31 and the pressing surface 32, a shape in which fine unevenness is formed according to the contact surface of the anvil or the contact surface of the sonotrode, or It is assumed that the shape is as follows.
  • the set of the receiving surface 31 and the pressing surface 32 and the set of the receiving surface 33 and the pressing surface 34 are formed to face each other in different directions. ing.
  • the first direction D1 and the second direction D2 are orthogonal to each other. That is, the bonding portion 30 is a portion formed by ultrasonic bonding from the two directions in which the exposed core wires 22a are orthogonal to each other. Therefore, the receiving surface 31 and the pressing surface 32, and the receiving surface 33 and the pressing surface 34 are orthogonal to each other. When a cross section (a cross section orthogonal to the extending direction of the bonding portion 30) of the bonding portion 30 is observed, it shows a square shape.
  • connection structure of conductive members An example of a method for manufacturing a connection structure of conductive members will be described.
  • FIG. 2 is a schematic view of an ultrasonic bonding apparatus 50 used in the method of manufacturing a connection structure of conductive members.
  • the ultrasonic bonding apparatus 50 includes a sonotrode 52, an anvil 54, and a side pressing member 56.
  • the sonotrode 52 and the anvil 54 are provided at mutually opposing positions.
  • the sonotrode 52 is provided on the lower side
  • the anvil 54 is provided on the upper side.
  • the vertical relationship between the sonotrode 52 and the anvil 54 may be reversed.
  • the sonotrode 52 and the anvil 54 may be configured to perform ultrasonic bonding in the left-right direction.
  • a pressing surface 52a is formed which is pressed against the exposed core wire 22a which is an example of the conductive member.
  • the pressing surface 52a may have a shape in which fine asperities are formed in order to suppress slippage with respect to the exposed core wire 22a.
  • the sonotrode 52 is connected to the ultrasonic vibration generator 53 in such a manner that the ultrasonic vibration from the ultrasonic vibration generator 53 can be transmitted to the sonotrode 52.
  • the ultrasonic vibration generator 53 includes an ultrasonic transducer 53a that generates ultrasonic vibration.
  • the sonotrode 52 is connected to the upper part of the ultrasonic vibration generator 53. Then, the ultrasonic vibration generated by the ultrasonic transducer 53 a is transmitted to the sonotrode 52.
  • ultrasonic vibration is usually applied to the exposed core 22a as vibration in a direction along the extending direction of the exposed core 22a.
  • the anvil 54 includes an anvil main body 54a and a side pressing piece 54b.
  • the anvil main body 54a is disposed at a position facing the upper side of the sonotrode 52, and is moved up and down with respect to the sonotrode 52 by a lift actuator constituted by a fluid cylinder (hydraulic cylinder, air cylinder) and a linear actuator such as a linear motor. It is moved close and away.
  • the downward surface of the anvil main body 54 a is a receiving surface 54 af that receives relative pressure force by the sonotrode 52.
  • the side pressing piece 54b is a piece extending from one side of the anvil main body 54a to the side of the sonotrode 52, and the inward surface is formed to be a flat surface.
  • the side pressing pieces 54b when sandwiching and pressing the exposed core wire 22a between the sonotrode 52 and the anvil main body 54a, restrict the protrusion of the exposed core wire 22a on one side thereof.
  • anvil body 54a and the side pressing piece 54b are integrated is described, a portion corresponding to the anvil body 54a and a portion corresponding to the side pressing piece 54b are separately provided.
  • the projecting dimension of the anvil main body 54a from the inward surface of the side pressing piece 54b can be adjusted (see FIGS. 13 and 14).
  • a gap is provided between the side pressing piece 54 b and the sonotrode 52 so as not to disturb the vibration of the sonotrode 52.
  • the side pressing member 56 is provided on the upper side of the sonotrode 52 and at a position opposite to the side pressing piece 54b at an interval.
  • the side pressing member 56 is moved closer to and separated from the side pressing piece 54b by a lifting and lowering drive unit configured by a linear actuator such as a fluid cylinder (hydraulic cylinder or air cylinder) or a linear motor.
  • a linear actuator such as a fluid cylinder (hydraulic cylinder or air cylinder) or a linear motor.
  • connection structure of the conductive members will be described by taking the use of the ultrasonic bonding apparatus 50 as an example.
  • each exposure core wire 22a demonstrates by the example containing nine strands 23 for convenience of explanation in each figure after FIG. 3, these numbers are arbitrary.
  • step (a) As the plurality of conductive members, a plurality (two in this case) of which the exposed core 22a is formed at the end of the electric wire 20 are prepared (step (a)). Two exposed core wires 22a are disposed between the anvil main body 54a and the sonotrode 52, and they are superimposed on each other (see FIG. 3). At this time, by arranging the side pressing member 56 at a position away from the side pressing piece 54b, the work of arranging the two exposed core wires 22a can be easily performed.
  • the anvil 54 is lowered to perform ultrasonic bonding in a state in which the two exposed core wires 22a are pressed in the direction along the first direction D1.
  • the two exposed core wires 22a and the individual strands 23 are sufficiently ultrasonically bonded to each other in the first direction D1.
  • the second direction D2 here, the horizontal direction
  • the bonding portion 30B ultrasonically bonded in the first direction D1 is formed. After this, the anvil main body 54a and the sonotrode 52 are separated.
  • the joint 30B is rotated 90 degrees around its center.
  • the anvil 54 is lowered again, and the two exposed core wires 22a are separated in the second direction D2 different from the first direction D1, here, the second direction orthogonal to the first direction D1.
  • ultrasonic bonding is further performed in a state in which the bonding portion 30B to which the two exposed core wires 22a are ultrasonically bonded is pressurized (step (c)).
  • step (c) ultrasonic bonding is sufficiently performed even between two exposed core wires 22a and between the respective strands 23 which are in contact in the second direction D2.
  • the two exposed core wires 22a are overlapped along the first direction D1
  • the two exposed core wires 22a are sufficiently ultrasonically bonded in the above-described first ultrasonic bonding step.
  • FIG. 7 it may be difficult to place two exposed cores 22a between the sonotrode 52 and the anvil main body 54a in a well-aligned manner.
  • FIG. 8 it is assumed that the two exposed core wires 22 a are in a posture in which they are horizontally arranged in the first direction D1. Then, since the two exposed core wires 22a vibrate in the same phase, there is a possibility that they may not be sufficiently joined. Therefore, at the time of the next ultrasonic bonding, as shown in FIG. 9, the bonding portion 30B is rotated by 90 degrees around its central axis, and ultrasonic bonding is performed in this state. Then, the two exposed cores 22a are sufficiently ultrasonically bonded.
  • the object to be bonded is best bonded in the pressure direction. Further, in the direction orthogonal to the pressing direction, the bonding object vibrates in the same phase, and the bonding force is weakened.
  • the bonding portion 30 since the exposed core wire 22a is ultrasonically bonded in the first direction D1, the bonding is sufficiently performed in the first direction D1. Further, since the exposed core wire 22a is ultrasonically bonded also in the second direction D2, the exposed core wire 22a is sufficiently bonded also in the second direction D2.
  • the bonding strength by ultrasonic bonding tends to be weak due to the influence of the oxide film formed on the surface. Therefore, as described above, by ultrasonically bonding the exposed core wires 22a from a plurality of directions, it is possible to ultrasonically bond the exposed core wires 22a formed of aluminum or an aluminum alloy with a sufficient bonding force.
  • the exposed core wire 22a is an assembly of a plurality of strands 23, in order to reduce the electrical resistance at the junction 30, the plurality of strands 23 are sufficiently ultrasonically joined to each other at the junction 30. Is preferred. Therefore, by forming the bonding portion 30 in a configuration in which ultrasonic bonding is performed in a plurality of directions, adjacent wires 23 are ultrasonically bonded in a plurality of directions. As a result, the plurality of strands 23 are also ultrasonically bonded as strongly as possible, and the electrical resistance at the bonding portion 30 can be reduced. As a result, even when the exposed core wire 22a includes a large number of strands 23, good ultrasonic bonding is possible, and the restriction due to the number of strands 23 can be eliminated as much as possible.
  • the conductive member is the core wire 22 of the electric wire 20
  • the core wires 22 of the electric wire 20 can be ultrasonically bonded with a sufficient bonding force as much as possible.
  • the bonding portion 30 is a portion where the exposed core wires 22a are bonded by ultrasonic bonding from two directions orthogonal to each other, the force at the time of ultrasonic bonding is generated around the entire bonding portion 30 by two ultrasonic bonding. Easy to add. As a result, even if the positional relationship of the exposed core wires 22a and their bonding surfaces are in any direction, ultrasonic bonding can be performed by applying some pressure in the direction in which they are in contact. However, it is not essential that the first direction D1 and the second direction D2 are orthogonal to each other, and the first direction D1 and the second direction may be directions different from each other.
  • the arrangement of the three exposed cores 22a is more likely to vary.
  • the interface F between the exposed cores 22a is in the direction of pressing by the sonotrod 52 and the anvil main body 54a. In contrast, it tends to vary in various directions. That is, the direction in which three or more conductive members are in contact is likely to vary.
  • the bonding portion 130B is rotated, and the bonding portion 130 is formed by performing ultrasonic bonding also in the second direction D2 different from the first direction D1.
  • the plurality of exposed core wires 22a can be ultrasonically bonded with sufficient bonding force at the boundary surface F along various directions, and ultrasonic bonding of three or more conductive members can be performed as strongly as possible.
  • the bonding thickness dimension (the distance dimension between the sonotrod 52 and the anvil main body 54a) at the time of ultrasonic bonding in the first direction D1.
  • the joint thickness dimension (the distance dimension between the sonotrode 52 and the anvil body 54a) may be the same.
  • the anvil 54 described in the above embodiment is divided into an anvil main body 254a corresponding to the anvil main body 54a and a side pressing piece 254b corresponding to the side pressing piece 54b.
  • the anvil main body 254a is configured to be able to drive forward and backward by a linear actuator such as a fluid cylinder (hydraulic cylinder, air cylinder), a linear motor, or the like, and is configured to be able to adjust the protrusion direction dimension with respect to the side pressing piece 254b.
  • the plurality of exposed core wires 22 a are ultrasonically bonded in the first direction D ⁇ b> 1 to form a bonding portion 230 ⁇ / b> B.
  • the pressing force, pressing time, and the like of the sonotrode 52 are adjusted to set the bonding thickness dimension (the distance dimension between the sonotroding 52 and the anvil main body 54a) to be a predetermined distance L.
  • the protrusion dimension of the anvil main body 254a with respect to the side pressing piece 254b is made the same as the dimension in the first direction D1 of the joint 230B, and the joint 230B is 90 degrees around its central axis. It is rotated and disposed between the sonotrode 52 and the anvil body 254a. Then, the plurality of exposed core wires 22a are ultrasonically bonded in the second direction D2 to form a bonding portion 230. At this time, the pressing force, pressing time, and the like of the sonotrode 52 are adjusted to set the bonding thickness dimension (the distance dimension between the sonotroding 52 and the anvil main body 54a) to be a predetermined distance L.
  • the joint portion 230 is formed in a square shape in cross section.
  • Pressure time etc. can be adjusted. Therefore, the other adjustment can be performed with reference to one adjustment value, and settings etc. when ultrasonically bonding a plurality of conductive members from a plurality of directions can be easily performed.
  • the exposed core wires 22a of the ends of the two electric wires 20 are overlapped with each other in the state of facing each other, and ultrasonic bonding is performed.
  • the exposed core wires 22a at the ends of the plurality of electric wires 20 may be overlapped in the same direction and ultrasonically bonded to form the bonding portion 330.
  • the exposed core wires 422 a in the middle in the extension direction of the two electric wires 20 may be overlapped and ultrasonically bonded to form the bonding portion 430.
  • three or more conductive members may be ultrasonically bonded.
  • the exposed core wire of the end of another wire may be ultrasonically bonded to the exposed core wire exposed in the middle in the extension direction of a certain wire. That is, the end portions of the plurality of conductive members and intermediate portions in the extension direction can be appropriately overlapped and joined to form a bonding structure of the plurality of conductive members.
  • ultrasonic bonding may be performed from three or more different directions.
  • the plurality of times of ultrasonic bonding may be performed by separate ultrasonic bonding devices.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Insulated Conductors (AREA)
  • Processing Of Terminals (AREA)

Abstract

The purpose of the present invention is to ultrasonically join a plurality of conductive members with as much bonding force as possible. A conductive member has a connection structure in which the plurality of conductive members are connected through a bonding part (30) that has been bonded by ultrasonic bonding from a plurality of directions. One example of the conductive member is a core wire (22a) exposed in an electric wire (20) including a core wire (22) and a covering (24) that covers the core wire (22). For example, the bonding part (30) is a portion formed by ultrasonic bonding from two directions (D1, D2) in which the plurality of conductive members are orthogonal to each other.

Description

導電部材の接続構造及び導電部材の接続構造製造方法Connecting structure of conductive member and method of manufacturing connecting structure of conductive member
　この発明は、導電部材同士を超音波接合する技術に関する。 The present invention relates to a technique for ultrasonically bonding conductive members.
　特許文献１は、複数の被覆電線における複数の露出芯線分を超音波溶接処理により一体化してスプライス部を形成する技術を開示している。 Patent Document 1 discloses a technique of integrating a plurality of exposed core segments in a plurality of coated wires by ultrasonic welding to form a splice.
特開２０１３－２２５３８７号公報JP, 2013-225387, A
　超音波接合は、複数の露出芯線分を挟んで加圧した状態で、超音波振動を付与することによって行われる。しかしながら、接合対象となる部分が加圧方向に対して横並びになっていると、当該接合対象となる部分が同位相で振動する。このため、超音波接合による接合力が不十分となる恐れがある。 Ultrasonic bonding is performed by applying ultrasonic vibration in a state of being pressed with a plurality of exposed core line segments interposed therebetween. However, when the part to be joined is horizontally aligned with the pressing direction, the part to be joined vibrates in the same phase. For this reason, there is a possibility that bonding strength by ultrasonic bonding may be insufficient.
　そこで、本発明は、複数の導電部材をなるべく十分な接合力で超音波接合できるようにすることを目的とする。 Then, an object of the present invention is to enable ultrasonic bonding of a plurality of conductive members with a sufficient bonding force as much as possible.
　上記課題を解決するため、第１の態様に係る導電部材の接続構造は、複数の導電部材が複数方向からの超音波接合によって接合された接合部を介して接続されているものである。 In order to solve the said subject, the connection structure of the electrically-conductive member which concerns on a 1st aspect is connected via the junction part with which the several electroconductive member was joined by ultrasonic bonding from multiple directions.
　第２の態様は、第１の態様に係る導電部材の接続構造であって、前記接合部の外周面に、アンビルの受面及びソノトロードによる加圧面が異なる方向において対向するように複数組形成されているものである。 A second aspect is the connection structure of the conductive members according to the first aspect, wherein a plurality of sets are formed on the outer peripheral surface of the joint so that the receiving surface of the anvil and the pressing surface by the sonotrode face in different directions. It is
　第３の態様は、第１又は第２の態様に係る導電部材の接続構造であって、前記複数の導電部材のそれぞれは、複数の素線の集合体とされている。 A third aspect is the connection structure of the conductive members according to the first or second aspect, wherein each of the plurality of conductive members is a collection of a plurality of strands.
　第４の態様は、第１から第３のいずれか１つの態様に係る導電部材の接続構造であって、前記複数の導電部材のそれぞれは、芯線と前記芯線を覆う被覆とを含む電線において露出した芯線とされている。 A fourth aspect is a connection structure of conductive members according to any one of the first to third aspects, wherein each of the plurality of conductive members is exposed in a wire including a core wire and a coating covering the core wire It is considered to be a core wire.
　第５の態様は、第１から第４のいずれか１つの態様に係る導電部材の接続構造であって、前記複数の導電部材は、共通する前記接合部を介して接合された３つ以上の前記導電部材を含む。 A fifth aspect is the connection structure of conductive members according to any one of the first to fourth aspects, wherein the plurality of conductive members are three or more joined via the common joint portion. The conductive member is included.
　第６の態様は、第１から第５のいずれか１つの態様に係る導電部材の接続構造であって、前記接合部は、前記複数の導電部材が互いに直交する２方向からの超音波接合によって形成された部分とされている。 A sixth aspect is a connection structure of conductive members according to any one of the first to fifth aspects, wherein the bonding portion is formed by ultrasonic bonding from two directions in which the plurality of conductive members are orthogonal to each other. It is considered to be a formed part.
　第７の態様は、第１から第６のいずれか１つの態様に係る導電部材の接続構造であって、前記接合部は、横断面が正方形状をなす形状に形成されている。 A seventh aspect is the connection structure of the conductive members according to any one of the first to sixth aspects, wherein the joint portion is formed in a shape having a square cross section.
　上記課題を解決するため、第８の態様に係る導電部材の接続構造製造方法は、（ａ）複数の導電部材を準備する工程と、（ｂ）複数の導電部材を第１方向に沿った方向で加圧した状態で超音波接合する工程と、（ｃ）複数の導電部材を前記第１方向とは異なる第２方向に沿った方向で加圧した状態で超音波接合する工程と、を備える。 In order to solve the above-mentioned subject, the connection structure manufacturing method of the conductive member concerning the 8th mode is the process of preparing (a) a plurality of conductive members, (b) a plurality of conductive members along the first direction Ultrasonic bonding in a pressurized state, and (c) ultrasonic bonding in a state in which a plurality of conductive members are pressed in a direction along a second direction different from the first direction. .
　第９の態様は、第８の態様に係る導電部材の接続構造製造方法であって、前記複数の導電部材のそれぞれは、複数の素線の集合体とされている。 A ninth aspect is a method of manufacturing a conductive member connection structure according to the eighth aspect, wherein each of the plurality of conductive members is a collection of a plurality of strands.
　第１０の態様は、第８又は第９の態様に係る導電部材の接続構造製造方法であって、前記工程（ａ）において、前記複数の導電部材として、３つ以上の前記導電部材を準備し、前記工程（ｂ）及び工程（ｃ）のそれぞれにおいて、前記３つ以上の導電部材を超音波接合する。 A tenth aspect is a method of manufacturing a conductive member connection structure according to the eighth or ninth aspect, wherein in the step (a), three or more of the conductive members are prepared as the plurality of conductive members. In each of the step (b) and the step (c), the three or more conductive members are ultrasonically bonded.
　第１１の態様は、第８から第１０のいずれか１つの態様に係る導電部材の接続構造製造方法であって、前記第２方向は、前記第１方向に対して直交する方向とされている。 An eleventh aspect is the connection member manufacturing method according to any one of the eighth to tenth aspects, wherein the second direction is perpendicular to the first direction. .
　第１２の態様は、第８から第１１のいずれか１つの態様に係る導電部材の接続構造製造方法であって、前記工程（ｂ）における接合厚み寸法と、前記工程（ｃ）における接合厚み寸法とが同じになるように設定する。 A twelfth aspect is the method for manufacturing a connection structure of conductive members according to any one of the eighth to eleventh aspects, wherein the bonding thickness dimension in the step (b) and the bonding thickness dimension in the step (c) Set to be the same.
　第１の態様によると、接合部において、複数の導電部材が複数方向からの超音波接合によって接合されている。このため、複数の導電部材をなるべく十分な接合力で超音波接合できる。 According to the first aspect, in the bonding portion, the plurality of conductive members are bonded by ultrasonic bonding from a plurality of directions. For this reason, ultrasonic bonding can be performed on the plurality of conductive members with a sufficient bonding force as much as possible.
　第２の態様によると、接合部の外周面に、アンビルの受面及びソノトロードによる加圧面が異なる方向において対向するように複数組形成されているため、接合部は、複数方向からの超音波接合によって接合されている。このため、複数の導電部材をなるべく十分な接合力で超音波接合できる。 According to the second aspect, since a plurality of sets are formed on the outer peripheral surface of the joint so that the receiving surface of the anvil and the pressing surface by the sonotrode face in different directions, the joint is ultrasonically bonded from a plurality of directions. Are joined by For this reason, ultrasonic bonding can be performed on the plurality of conductive members with a sufficient bonding force as much as possible.
　第３の態様によると、各素線が複数方向から超音波接合されるため、各素線をなるべく強固に超音波接合できる。 According to the third aspect, since the respective strands are ultrasonically bonded from a plurality of directions, the respective strands can be ultrasonically bonded as firmly as possible.
　第４の態様によると、芯線と前記芯線を覆う被覆とを含む電線において露出した芯線である導電部材をなるべく十分な接合力で超音波接合できる。 According to the fourth aspect, the conductive member which is the core wire exposed in the electric wire including the core wire and the coating covering the core wire can be ultrasonically bonded with a sufficient bonding force as much as possible.
　第５の態様によると、３つ以上の導電部材を、共通する接合部を介して接合する場合、３つ以上の導電部材が接する方向はばらつき易い。そこで、接合部において、３つ以上の導電部材が複数方向からの超音波接合によって共通する接合部を介して接合された構成とすることで、３つ以上の導電部材をなるべく強固に超音波接合できる。 According to the fifth aspect, when three or more conductive members are joined via a common joint, the direction in which the three or more conductive members are in contact tends to vary. Therefore, in the bonding portion, by using a configuration in which three or more conductive members are bonded via a common bonding portion by ultrasonic bonding from a plurality of directions, ultrasonic bonding is performed as strongly as possible to the three or more conductive members. it can.
　第６の態様によると、接合部は、複数の導電部材が互いに直交する２方向から超音波接合によって接合された部分であるため、２回の超音波接合によって接合部の周囲全体に超音波接合時の力を加えやすい。このため、複数の導電部材をなるべく十分な接合力で超音波接合できる。 According to the sixth aspect, since the bonding portion is a portion where the plurality of conductive members are bonded by ultrasonic bonding from two directions orthogonal to each other, ultrasonic bonding is performed around the entire bonding portion by two ultrasonic bondings. It is easy to apply the power of time. For this reason, ultrasonic bonding can be performed on the plurality of conductive members with a sufficient bonding force as much as possible.
　第７の態様によると、接合部は、断面が正方形状をなす形状に形成されているため、複数の導電部材を複数方向から超音波接合する際の設定等を容易に行える。 According to the seventh aspect, since the bonding portion is formed in a square shape in cross section, settings and the like can be easily performed when ultrasonically bonding a plurality of conductive members from a plurality of directions.
　第８の態様によると、複数の導電部材を第１方向及び第１方向とは異なる第２方向からの超音波接合によって接合する。このため、複数の導電部材をなるべく十分な接合力で超音波接合できる。 According to the eighth aspect, the plurality of conductive members are joined by ultrasonic bonding from a first direction and a second direction different from the first direction. For this reason, ultrasonic bonding can be performed on the plurality of conductive members with a sufficient bonding force as much as possible.
　第９の態様によると、各素線が複数方向から超音波接合されるため、各素線をなるべく強固に超音波接合できる。 According to the ninth aspect, since the strands are ultrasonically bonded from a plurality of directions, the strands can be ultrasonically bonded as firmly as possible.
　第１０の態様によると、３つ以上の導電部材を、共通する接合部を介して接合する場合、３つ以上の導電部材が接する方向はばらつき易い。そこで、接合部において、３つ以上の導電部材が複数方向からの超音波接合によって共通する接合部を介して接合された構成とすることで、３つ以上の導電部材をなるべく強固に超音波接合できる。 According to the tenth aspect, in the case where three or more conductive members are joined via a common joint, the direction in which the three or more conductive members are in contact tends to vary. Therefore, in the bonding portion, by using a configuration in which three or more conductive members are bonded via a common bonding portion by ultrasonic bonding from a plurality of directions, ultrasonic bonding is performed as strongly as possible to the three or more conductive members. it can.
　第１１の態様によると、接合部は、複数の導電部材が互いに直交する第１方向及び第２方向から超音波接合によって接合された部分であるため、２回の超音波接合によって接合部の周囲全体に超音波接合時の力を加えやすい。このため、複数の導電部材をなるべく十分な接合力で超音波接合できる。 According to the eleventh aspect, since the bonding portion is a portion where the plurality of conductive members are bonded by ultrasonic bonding from the first direction and the second direction orthogonal to each other, the periphery of the bonding portion is formed by two ultrasonic bondings. It is easy to apply the force at the time of ultrasonic bonding to the whole. For this reason, ultrasonic bonding can be performed on the plurality of conductive members with a sufficient bonding force as much as possible.
　第１２の態様によると、前記工程（ｂ）における接合厚み寸法と、前記工程（ｃ）における接合厚み寸法とが同じになるように設定するため、複数の導電部材を複数方向から超音波接合する際の設定等を容易に行える。 According to the twelfth aspect, in order to set the bonding thickness dimension in the step (b) and the bonding thickness dimension in the step (c) to be the same, ultrasonic bonding of a plurality of conductive members is performed from a plurality of directions. You can easily make settings etc.
導電部材の接続構造を示す斜視図である。It is a perspective view which shows the connection structure of a conductive member. 導電部材の接続構造製造方法に用いられる超音波接合装置の概略図である。It is the schematic of the ultrasonic bonding apparatus used for the connection structure manufacturing method of a conductive member. 導電部材の接続構造製造方法の一工程を示す説明図である。It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. 導電部材の接続構造製造方法の一工程を示す説明図である。It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. 導電部材の接続構造製造方法の一工程を示す説明図である。It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. 導電部材の接続構造製造方法の一工程を示す説明図である。It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. 導電部材の配置例を示す説明図である。It is an explanatory view showing an example of arrangement of a conductive member. 導電部材の接続構造製造方法の一工程を示す説明図である。It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. 導電部材の接続構造製造方法の一工程を示す説明図である。It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. 導電部材の配置例を示す説明図である。It is an explanatory view showing an example of arrangement of a conductive member. 導電部材の接続構造製造方法の一工程を示す説明図である。It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. 導電部材の接続構造製造方法の一工程を示す説明図である。It is explanatory drawing which shows 1 process of the connection structure manufacturing method of an electrically-conductive member. 変形例に係る導電部材の接続構造製造方法の一工程を示す説明図である。It is explanatory drawing which shows 1 process of the connection structure manufacturing method of the electrically-conductive member which concerns on a modification. 変形例に係る導電部材の接続構造製造方法の一工程を示す説明図である。It is explanatory drawing which shows 1 process of the connection structure manufacturing method of the electrically-conductive member which concerns on a modification. 変形例に係る導電部材の接続構造を示す斜視図である。It is a perspective view which shows the connection structure of the electrically-conductive member which concerns on a modification. 他の変形例に係る導電部材の接続構造を示す斜視図である。It is a perspective view which shows the connection structure of the electrically-conductive member which concerns on another modification. さらに他の変形例に係る導電部材の接続構造を示す斜視図である。It is a perspective view which shows the connection structure of the electrically-conductive member which concerns on another modification.
　以下、実施形態に係る導電部材の接続構造及び導電部材の接続構造製造方法について説明する。 Hereinafter, the connection structure of the conductive member and the connection structure manufacturing method of the conductive member according to the embodiment will be described.
　＜導電部材の接続構造＞
　図１は導電部材の接続構造１０を示す斜視図である。この導電部材の接続構造１０は、複数の導電部材が接合部３０を介して接続された構成とされている。 <Connection structure of conductive members>
FIG. 1 is a perspective view showing a connection structure 10 of a conductive member. The connection structure 10 of the conductive member is configured such that a plurality of conductive members are connected via the bonding portion 30.
　本実施形態においては、複数の導電部材として、電線２０の芯線２２であることを想定している。電線２０は、芯線２２と、被覆２４とを備える。 In this embodiment, it is assumed that it is core wire 22 of electric wire 20 as a plurality of electric conduction members. The electric wire 20 includes a core 22 and a sheath 24.
　芯線２２は、複数の素線２３の集合体である。素線２３は、アルミニウム、アルミニウム合金、銅又は銅合金等で形成された金属線である。芯線２２は、複数の素線が線状に集合された形態とされている。芯線２２は、複数の素線２３が撚り合わされたものであることが想定される。 The core wire 22 is an assembly of a plurality of strands 23. The wire 23 is a metal wire formed of aluminum, an aluminum alloy, copper, a copper alloy or the like. The core wire 22 is in a form in which a plurality of strands are linearly gathered. The core wire 22 is assumed to be a plurality of strands 23 twisted together.
　被覆２４は、芯線２２の周囲を被覆する絶縁部材である。被覆２４は、例えば、芯線２２の周囲に樹脂を押出被覆することによって形成される。 The coating 24 is an insulating member that covers the periphery of the core wire 22. The coating 24 is formed, for example, by extrusion coating a resin around the core wire 22.
　芯線が複数の素線の集合体である形態としては、素線が筒状に編まれた編組線であることも想定される。芯線２２が複数の素線２３の集合体であることは必須ではなく、例えば、芯線は単芯線によって構成されていてもよい。 As a form in which a core wire is an aggregate of a plurality of strands, it is also assumed that a strand is a braided wire braided cylindrically. It is not essential that core wire 22 is an assembly of a plurality of strands 23, for example, core wire may be constituted by a single core wire.
　被覆２４が押出被覆によって芯線２２の周囲に形成されることは必須ではなく、例えば、被覆は芯線の周囲を覆った状態で熱収縮した熱収縮チューブであってもよい。被覆は省略されてもよい。 It is not essential that the coating 24 be formed around the core wire 22 by extrusion coating, for example, the coating may be a heat-shrinkable tube which is heat-shrunk in a state of covering the periphery of the core wire. The covering may be omitted.
　ここでは、複数の導電部材は、２つの電線２０の芯線２２である。２つの電線２０の端部において、被覆２４が除去され、その端部に露出芯線２２ａが形成されている。２つの電線２０の端部同士が向合った状態で、露出芯線２２ａ同士が重ね合される。そして、露出芯線２２ａの重ね合された部分同士が超音波接合されることで、接合部３０が形成されている。 Here, the plurality of conductive members are core wires 22 of the two electric wires 20. At the ends of the two wires 20, the coating 24 is removed, and the exposed core 22a is formed at the ends. With the ends of the two wires 20 facing each other, the exposed core wires 22a are overlapped. And the joined part 30 is formed by carrying out ultrasonic bonding of the part by which the exposed core wire 22a was put together.
　接合部３０は、露出芯線２２ａが複数方向からの超音波接合によって接合された部分である。ここでは、２つの露出芯線２２ａが重ね合せて配設されている。接合部３０において、第１方向Ｄ１からの超音波接合によって２つの露出芯線２２ａ同士が接合されている。また、第１方向Ｄ１とは異なる第２方向Ｄ２からの超音波接合によっても２つの露出芯線２２ａ同士が接合されている。 The bonding portion 30 is a portion where the exposed core wire 22a is bonded by ultrasonic bonding from a plurality of directions. Here, two exposed core wires 22a are disposed in a superimposed manner. In the bonding portion 30, the two exposed core wires 22a are bonded to each other by ultrasonic bonding from the first direction D1. The two exposed core wires 22a are also joined by ultrasonic bonding from the second direction D2 different from the first direction D1.
　第１方向Ｄ１及び第２方向Ｄ２は、露出芯線２２ａの延在方向に対して直交する方向であり、また、第１方向Ｄ１と第２方向Ｄ２とは相互に異なる方向である。ここで、超音波接合における接合方向は、接合部３０を基準とする、超音波接合時における加圧方向と同義である。図１では、２つの露出芯線２２ａの重ね合せ方向が第１方向Ｄ１であり、これに直交する方向が第２方向Ｄ２である例が示されている。 The first direction D1 and the second direction D2 are directions orthogonal to the extending direction of the exposed core wire 22a, and the first direction D1 and the second direction D2 are different from each other. Here, the bonding direction in ultrasonic bonding is synonymous with the pressure direction in ultrasonic bonding based on the bonding portion 30. FIG. 1 shows an example in which the overlapping direction of the two exposed core wires 22a is the first direction D1 and the direction orthogonal to this is the second direction D2.
　接合部３０の外周面には、第１方向Ｄ１で超音波接合する際に形成されたアンビルの受面３１と、ソノトロードによる加圧面３２とが形成されている。超音波接合時には、アンビルとソノトロードとの間で接合対象物を挟込んで加圧し、ソノトロード側から超音波振動を付与する。図１に示す例では、第１方向Ｄ１で超音波接合する際には、２つの露出芯線２２ａの重ね合せ方向に沿ってそれらを挟込んで加圧している。このため、接合部３０の外周面のうち２つの露出芯線２２ａの重ね合せ方向一方側にアンビルの受面３１が形成され、他方側にソノトロードによる加圧面３２が形成されている。 On the outer peripheral surface of the bonding portion 30, a receiving surface 31 of an anvil formed in ultrasonic bonding in the first direction D1 and a pressing surface 32 by sonotroding are formed. At the time of ultrasonic bonding, the object to be welded is sandwiched between the anvil and the sonotrode and pressurized, and ultrasonic vibration is applied from the sonotrode side. In the example shown in FIG. 1, when ultrasonically bonding in the first direction D1, they are sandwiched and pressed along the overlapping direction of the two exposed core wires 22a. For this reason, the receiving surface 31 of the anvil is formed on one side in the overlapping direction of the two exposed core wires 22a among the outer peripheral surfaces of the joint portion 30, and the pressing surface 32 by sonotrode is formed on the other side.
　上記受面３１及び加圧面３２は、アンビル又はソノトロードにより直接押される部分であるため、アンビルの接触面又はソノトロードの接触面に応じた表面形状に形成される。受面３１及び加圧面３２は、アンビルの接触面又はソノトロードの接触面に応じて、細かい凹凸が形成された形状であること、或は、平滑な形状であること等が想定される。 The receiving surface 31 and the pressing surface 32 are portions directly pressed by the anvil or the sonotrode, and thus are formed in a surface shape corresponding to the contact surface of the anvil or the contacting surface of the sonotrode. It is assumed that the receiving surface 31 and the pressing surface 32 have a shape in which fine asperities are formed or a smooth shape according to the contact surface of the anvil or the contact surface of the sonotrode.
　また、接合部３０の外周面には、第２方向Ｄ２で超音波接合する際に形成されたアンビルの受面３３と、ソノトロードによる加圧面３４とが形成されている。これらの受面３３及び加圧面３４は、上記受面３１及び加圧面３２と同様に、アンビルの接触面又はソノトロードの接触面に応じて、細かい凹凸が形成された形状であること、又は、平滑な形状であること等が想定される。 Further, on the outer peripheral surface of the bonding portion 30, a receiving surface 33 of the anvil formed at the time of ultrasonic bonding in the second direction D2 and a pressing surface 34 by sonotroding are formed. The receiving surface 33 and the pressing surface 34 have, like the receiving surface 31 and the pressing surface 32, a shape in which fine unevenness is formed according to the contact surface of the anvil or the contact surface of the sonotrode, or It is assumed that the shape is as follows.
　第１方向Ｄ１と第２方向とは相互に異なる方向であるため、受面３１及び加圧面３２の組と、受面３３及び加圧面３４の組とは、異なる方向において対向するように形成されている。 Since the first direction D1 and the second direction are different from each other, the set of the receiving surface 31 and the pressing surface 32 and the set of the receiving surface 33 and the pressing surface 34 are formed to face each other in different directions. ing.
　また、上記第１方向Ｄ１と第２方向Ｄ２とは、互いに直交している。つまり、接合部３０は、露出芯線２２ａが互いに直交する２方向から超音波接合されることによって形成された部分である。このため、受面３１及び加圧面３２と、受面３３及び加圧面３４とは、互いに直交している。接合部３０の横断面（接合部３０の延在方向に対して直交する断面）を観察すると、四角い形状を示す。 The first direction D1 and the second direction D2 are orthogonal to each other. That is, the bonding portion 30 is a portion formed by ultrasonic bonding from the two directions in which the exposed core wires 22a are orthogonal to each other. Therefore, the receiving surface 31 and the pressing surface 32, and the receiving surface 33 and the pressing surface 34 are orthogonal to each other. When a cross section (a cross section orthogonal to the extending direction of the bonding portion 30) of the bonding portion 30 is observed, it shows a square shape.
　＜導電部材の接続構造製造方法＞
　導電部材の接続構造製造方法の一例について説明する。 <Method of manufacturing connection structure of conductive members>
An example of a method for manufacturing a connection structure of conductive members will be described.
　図２は導電部材の接続構造製造方法に用いられる超音波接合装置５０の概略図である。 FIG. 2 is a schematic view of an ultrasonic bonding apparatus 50 used in the method of manufacturing a connection structure of conductive members.
　超音波接合装置５０は、ソノトロード５２と、アンビル５４と、側方押え部材５６とを備える。 The ultrasonic bonding apparatus 50 includes a sonotrode 52, an anvil 54, and a side pressing member 56.
　ソノトロード５２とアンビル５４とは互いに対向する位置に設けられている。ここでは、ソノトロード５２が下側に設けられ、アンビル５４が上側に設けられている。ソノトロード５２とアンビル５４の上下関係は逆であってもよい。また、ソノトロード５２とアンビル５４とが左右方向から超音波接合を行う構成であってもよい。 The sonotrode 52 and the anvil 54 are provided at mutually opposing positions. Here, the sonotrode 52 is provided on the lower side, and the anvil 54 is provided on the upper side. The vertical relationship between the sonotrode 52 and the anvil 54 may be reversed. Further, the sonotrode 52 and the anvil 54 may be configured to perform ultrasonic bonding in the left-right direction.
　ソノトロード５２の上面には、導電部材の一例である露出芯線２２ａに押付けられる加圧面５２ａが形成されている。露出芯線２２ａに対する滑りを抑制するため、加圧面５２ａは、細かい凹凸が形成された形状であってもよい。 On the upper surface of the sonotrode 52, a pressing surface 52a is formed which is pressed against the exposed core wire 22a which is an example of the conductive member. The pressing surface 52a may have a shape in which fine asperities are formed in order to suppress slippage with respect to the exposed core wire 22a.
　超音波振動発生部５３からの超音波振動がソノトロード５２に伝達可能な態様で、ソノトロード５２が超音波振動発生部５３に連結されている。超音波振動発生部５３は、超音波振動を発生させる超音波振動子５３ａを備える。図２に示す例では、超音波振動発生部５３の上部にソノトロード５２が連結されている。そして、超音波振動子５３ａで発生した超音波振動がソノトロード５２に伝達される。通常、通常、超音波振動は、露出芯線２２ａの延在方向に沿った方向の振動として、露出芯線２２ａに付与される。 The sonotrode 52 is connected to the ultrasonic vibration generator 53 in such a manner that the ultrasonic vibration from the ultrasonic vibration generator 53 can be transmitted to the sonotrode 52. The ultrasonic vibration generator 53 includes an ultrasonic transducer 53a that generates ultrasonic vibration. In the example shown in FIG. 2, the sonotrode 52 is connected to the upper part of the ultrasonic vibration generator 53. Then, the ultrasonic vibration generated by the ultrasonic transducer 53 a is transmitted to the sonotrode 52. Usually, ultrasonic vibration is usually applied to the exposed core 22a as vibration in a direction along the extending direction of the exposed core 22a.
　アンビル５４は、アンビル本体５４ａと側方押え片５４ｂとを備える。 The anvil 54 includes an anvil main body 54a and a side pressing piece 54b.
　アンビル本体５４ａは、上記ソノトロード５２の上側に対向する位置に配設されており、流体シリンダ（油圧シリンダ、エアシリンダ）、リニアモータ等のリニアアクチュエータによって構成される昇降駆動部によってソノトロード５２に対して接近離隔移動される。アンビル本体５４ａの下向き面は、ソノトロード５２による相対的な加圧力を受ける受面５４ａｆである。 The anvil main body 54a is disposed at a position facing the upper side of the sonotrode 52, and is moved up and down with respect to the sonotrode 52 by a lift actuator constituted by a fluid cylinder (hydraulic cylinder, air cylinder) and a linear actuator such as a linear motor. It is moved close and away. The downward surface of the anvil main body 54 a is a receiving surface 54 af that receives relative pressure force by the sonotrode 52.
　側方押え片５４ｂは、アンビル本体５４ａの一側方からソノトロード５２側に延出する片であり、内向きの面は平坦な面に形成されている。この側方押え片５４ｂは、ソノトロード５２とアンビル本体５４ａとの間で露出芯線２２ａを挟込んで加圧する際に、その一側方で露出芯線２２ａのはみ出しを規制する。 The side pressing piece 54b is a piece extending from one side of the anvil main body 54a to the side of the sonotrode 52, and the inward surface is formed to be a flat surface. The side pressing pieces 54b, when sandwiching and pressing the exposed core wire 22a between the sonotrode 52 and the anvil main body 54a, restrict the protrusion of the exposed core wire 22a on one side thereof.
　なお、ここでは、アンビル本体５４ａと側方押え片５４ｂとが一体化された例で説明するが、アンビル本体５４ａに相当する部分と側方押え片５４ｂに相当する部分とが別体に設けられ、側方押え片５４ｂの内向き面からのアンビル本体５４ａの突出寸法が調整可能とされる例もあり得る（図１３及び図１４参照）。 Here, although an example in which the anvil body 54a and the side pressing piece 54b are integrated is described, a portion corresponding to the anvil body 54a and a portion corresponding to the side pressing piece 54b are separately provided. There may be an example in which the projecting dimension of the anvil main body 54a from the inward surface of the side pressing piece 54b can be adjusted (see FIGS. 13 and 14).
　なお、側方押え片５４ｂとソノトロード５２との間には、ソノトロード５２の振動を妨げないように隙間が設けられている。 A gap is provided between the side pressing piece 54 b and the sonotrode 52 so as not to disturb the vibration of the sonotrode 52.
　側方押え部材５６は、ソノトロード５２の上側であって上記側方押え片５４ｂに対して間隔をあけて対向する位置に設けられている。側方押え部材５６は、流体シリンダ（油圧シリンダ、エアシリンダ）、リニアモータ等のリニアアクチュエータによって構成される昇降駆動部によって側方押え片５４ｂに対して接近離隔移動される。側方押え部材５６が側方押え片５４ｂに近づいた状態では、側方押え部材５６の上部の内向き面がアンビル本体５４ａの外向き面に当接する。この状態では、ソノトロード５２の振動を妨げないように、側方押え部材５６とソノトロード５２との間に隙間が設けられている。側方押え部材５６が側方押え片５４ｂから遠ざかった状態（図２において２点鎖線で示す側方押え部材５６参照）では、側方押え部材５６の上部の内向き面とアンビル本体５４ａの外向き面との間に隙間が形成される。この隙間を通って、露出芯線２２ａを容易にソノトロード５２とアンビル本体５４ａとの間に配設することができる。 The side pressing member 56 is provided on the upper side of the sonotrode 52 and at a position opposite to the side pressing piece 54b at an interval. The side pressing member 56 is moved closer to and separated from the side pressing piece 54b by a lifting and lowering drive unit configured by a linear actuator such as a fluid cylinder (hydraulic cylinder or air cylinder) or a linear motor. When the side pressing member 56 approaches the side pressing piece 54b, the upper inward surface of the side pressing member 56 abuts on the outward surface of the anvil main body 54a. In this state, a gap is provided between the side pressing member 56 and the sonotrode 52 so as not to disturb the vibration of the sonotrode 52. When the side pressing member 56 is away from the side pressing piece 54b (see the side pressing member 56 shown by a two-dot chain line in FIG. 2), the upper inward surface of the side pressing member 56 and the outside of the anvil main body 54a A gap is formed between the facing surface. Through this gap, the exposed core 22a can be easily disposed between the sonotrode 52 and the anvil body 54a.
　上記超音波接合装置５０を用いることを一例として、導電部材の接続構造製造方法を説明する。なお、図３以下の各図では、説明の便宜上、各露出芯線２２ａが９本の素線２３を含む例で説明するが、これらの数は任意である。 A method of manufacturing the connection structure of the conductive members will be described by taking the use of the ultrasonic bonding apparatus 50 as an example. In addition, although each exposure core wire 22a demonstrates by the example containing nine strands 23 for convenience of explanation in each figure after FIG. 3, these numbers are arbitrary.
　まず、複数の導電部材として、電線２０の端部に露出芯線２２ａが形成されたもの複数（ここでは２つ）を準備する（工程（ａ））。２つの露出芯線２２ａをアンビル本体５４ａとソノトロード５２との間に配設し、それらを重ね合せた状態とする（図３参照）。この際、側方押え部材５６を、側方押え片５４ｂから遠ざかった位置に配設することによって、２つの露出芯線２２ａの配設作業を容易に行える。 First, as the plurality of conductive members, a plurality (two in this case) of which the exposed core 22a is formed at the end of the electric wire 20 are prepared (step (a)). Two exposed core wires 22a are disposed between the anvil main body 54a and the sonotrode 52, and they are superimposed on each other (see FIG. 3). At this time, by arranging the side pressing member 56 at a position away from the side pressing piece 54b, the work of arranging the two exposed core wires 22a can be easily performed.
　次に、図４に示すように、アンビル５４を下降させて、２つの露出芯線２２ａを第１方向Ｄ１に沿った方向で加圧した状態で超音波接合する。これにより、２つの露出芯線２２ａ同士、及び、各素線２３同士が、第１方向Ｄ１において接触するもの同士の間で十分に超音波接合される。これに対して、第１方向Ｄ１に対して直交する第２方向Ｄ２（ここでは横方向）においては、２つの露出芯線２２ａ同士、及び、各素線２３同士は、不十分な超音波接合となる恐れがある。これにより、第１方向Ｄ１において超音波接合された接合部３０Ｂが形成される。この後、アンビル本体５４ａとソノトロード５２とは離間した状態となる。 Next, as shown in FIG. 4, the anvil 54 is lowered to perform ultrasonic bonding in a state in which the two exposed core wires 22a are pressed in the direction along the first direction D1. As a result, the two exposed core wires 22a and the individual strands 23 are sufficiently ultrasonically bonded to each other in the first direction D1. On the other hand, in the second direction D2 (here, the horizontal direction) orthogonal to the first direction D1, the two exposed core wires 22a and the respective strands 23 are not sufficient for ultrasonic bonding. There is a risk of Thus, the bonding portion 30B ultrasonically bonded in the first direction D1 is formed. After this, the anvil main body 54a and the sonotrode 52 are separated.
　次に、図５に示すように、接合部３０Ｂをその中心周りに９０度回転させる。そして、図６に示すように、アンビル５４を再度下降させて、２つの露出芯線２２ａを第１方向Ｄ１とは異なる第２方向Ｄ２、ここでは、第１方向Ｄ１に対して直交する第２方向Ｄ２において、２つの露出芯線２２ａが超音波接合された接合部３０Ｂを加圧した状態でさらに超音波接合する（工程（ｃ））。これにより、２つの露出芯線２２ａ同士、及び、各素線２３同士が、第２方向Ｄ２において接触するもの同士の間でも十分に超音波接合される。 Next, as shown in FIG. 5, the joint 30B is rotated 90 degrees around its center. Then, as shown in FIG. 6, the anvil 54 is lowered again, and the two exposed core wires 22a are separated in the second direction D2 different from the first direction D1, here, the second direction orthogonal to the first direction D1. At D2, ultrasonic bonding is further performed in a state in which the bonding portion 30B to which the two exposed core wires 22a are ultrasonically bonded is pressurized (step (c)). As a result, ultrasonic bonding is sufficiently performed even between two exposed core wires 22a and between the respective strands 23 which are in contact in the second direction D2.
　２つの露出芯線２２ａが第１方向Ｄ１に沿って重ね合されている場合には、上記した１回目の超音波接合工程において、２つの露出芯線２２ａが十分に超音波接合される。しかしながら、図７に示すように、２つの露出芯線２２ａをソノトロード５２とアンビル本体５４ａとの間でうまく上下に重ね合せて配置することが困難な場合がある。この場合、図８に示すように、２つの露出芯線２２ａが第１方向Ｄ１に対して横並びとなる姿勢となることが想定される。すると、２つの露出芯線２２ａは、同位相で振動するため、十分に接合されない恐れがある。そこで、次の超音波接合時において、図９に示すように、接合部３０Ｂをその中心軸周りに９０度回転させ、この状態で、超音波接合を行う。すると、２つの露出芯線２２ａが十分に超音波接合される。 When the two exposed core wires 22a are overlapped along the first direction D1, the two exposed core wires 22a are sufficiently ultrasonically bonded in the above-described first ultrasonic bonding step. However, as shown in FIG. 7, it may be difficult to place two exposed cores 22a between the sonotrode 52 and the anvil main body 54a in a well-aligned manner. In this case, as shown in FIG. 8, it is assumed that the two exposed core wires 22 a are in a posture in which they are horizontally arranged in the first direction D1. Then, since the two exposed core wires 22a vibrate in the same phase, there is a possibility that they may not be sufficiently joined. Therefore, at the time of the next ultrasonic bonding, as shown in FIG. 9, the bonding portion 30B is rotated by 90 degrees around its central axis, and ultrasonic bonding is performed in this state. Then, the two exposed cores 22a are sufficiently ultrasonically bonded.
　＜効果等＞
　以上の導電部材の接続構造１０及び導電部材の接続構造製造方法によると、複数の導電部材をなるべく十分な接合力で超音波接合できる。 <Effects>
According to the connecting structure 10 of the conductive member and the method of manufacturing the connecting structure of the conductive member described above, ultrasonic bonding of the plurality of conductive members can be performed with a sufficient bonding force as much as possible.
　すなわち、超音波接合においては、接合対象物は、加圧方向において最もよく接合される。また、加圧方向と直交する方向においては、接合対象物が同位相で振動してしまうため、接合力が弱くなってしまう。上記接合部３０では、露出芯線２２ａが第１方向Ｄ１において超音波接合されているため、当該第１方向Ｄ１において十分に接合されている。また、露出芯線２２ａは第２方向Ｄ２においても超音波接合されているため、当該第２方向Ｄ２においても十分に接合されている。このため、２つの露出芯線２２ａの位置関係等に応じて、２つの露出芯線２２ａの接合面が第１方向Ｄ１に対して傾いても、第２方向Ｄ２での超音波接合によって十分に接合される。これにより、複数の露出芯線２２ａをなるべく十分な接合力で超音波接合できる。後に説明するように、３本以上の露出芯線２２ａを超音波接合する場合でも、同様に十分な接合力で超音波接合できる。結果、露出芯線２２ａの配置、本数等による制約をなるべく排除して、複数の露出芯線を超音波接合できる。 That is, in ultrasonic bonding, the object to be bonded is best bonded in the pressure direction. Further, in the direction orthogonal to the pressing direction, the bonding object vibrates in the same phase, and the bonding force is weakened. In the bonding portion 30, since the exposed core wire 22a is ultrasonically bonded in the first direction D1, the bonding is sufficiently performed in the first direction D1. Further, since the exposed core wire 22a is ultrasonically bonded also in the second direction D2, the exposed core wire 22a is sufficiently bonded also in the second direction D2. Therefore, even if the bonding surface of the two exposed cores 22a is inclined with respect to the first direction D1 according to the positional relationship and the like of the two exposed cores 22a, bonding is sufficiently performed by ultrasonic bonding in the second direction D2. Ru. Thereby, ultrasonic bonding can be performed on the plurality of exposed core wires 22a with a sufficient bonding force as much as possible. As described later, even in the case of ultrasonically bonding three or more exposed core wires 22a, ultrasonic bonding can be performed similarly with sufficient bonding force. As a result, it is possible to ultrasonically bond a plurality of exposed core wires, as much as possible, by eliminating the limitations imposed by the arrangement, the number of the exposed core wires 22a, and the like.
　特に、露出芯線２２ａがアルミニウム又はアルミニウム合金によって形成される場合、表面に形成される酸化皮膜の影響等によって、超音波接合による接合力が弱くなりがちである。そこで、上記のように、複数方向から露出芯線２２ａ同士を超音波接合することによって、アルミニウム又はアルミニウム合金によって形成された露出芯線２２ａを十分な接合力で超音波接合できる。 In particular, when the exposed core wire 22a is formed of aluminum or an aluminum alloy, the bonding strength by ultrasonic bonding tends to be weak due to the influence of the oxide film formed on the surface. Therefore, as described above, by ultrasonically bonding the exposed core wires 22a from a plurality of directions, it is possible to ultrasonically bond the exposed core wires 22a formed of aluminum or an aluminum alloy with a sufficient bonding force.
　また、露出芯線２２ａが複数の素線２３の集合体である場合、接合部３０での電気抵抗を小さくするためには、接合部３０において複数の素線２３同士も十分に超音波接合されていることが好ましい。そこで、接合部３０を複数方向から超音波接合された構成とすることで、隣合う素線２３同士が複数方向から超音波接合されることになる。これにより、複数の素線２３同士もなるべく強固に超音波接合され、接合部３０での電気抵抗を小さくできる。結果、露出芯線２２ａが多数の素線２３を含む場合でも、良好な超音波接合が可能となり、素線２３の数による制約もなるべく排除できる。 In addition, when the exposed core wire 22a is an assembly of a plurality of strands 23, in order to reduce the electrical resistance at the junction 30, the plurality of strands 23 are sufficiently ultrasonically joined to each other at the junction 30. Is preferred. Therefore, by forming the bonding portion 30 in a configuration in which ultrasonic bonding is performed in a plurality of directions, adjacent wires 23 are ultrasonically bonded in a plurality of directions. As a result, the plurality of strands 23 are also ultrasonically bonded as strongly as possible, and the electrical resistance at the bonding portion 30 can be reduced. As a result, even when the exposed core wire 22a includes a large number of strands 23, good ultrasonic bonding is possible, and the restriction due to the number of strands 23 can be eliminated as much as possible.
　また、導電部材は、電線２０の芯線２２であるため、電線２０の芯線２２同士をなるべく十分な接合力で超音波接合できる。 Further, since the conductive member is the core wire 22 of the electric wire 20, the core wires 22 of the electric wire 20 can be ultrasonically bonded with a sufficient bonding force as much as possible.
　また、接合部３０は、露出芯線２２ａが互いに直交する２方向から超音波接合によって接合された部分であるため、２回の超音波接合によって接合部３０の周囲全体に超音波接合時の力を加えやすい。これにより、露出芯線２２ａの位置関係、それらの接合面が如何なる方向であっても、それらが接する方向に幾分かの加圧力を加えて超音波接合できる。もっとも、第１方向Ｄ１と第２方向Ｄ２とが互いに直交する方向であることは必須ではなく、第１方向Ｄ１と第２方向とは互いに異なる方向であればよい。 In addition, since the bonding portion 30 is a portion where the exposed core wires 22a are bonded by ultrasonic bonding from two directions orthogonal to each other, the force at the time of ultrasonic bonding is generated around the entire bonding portion 30 by two ultrasonic bonding. Easy to add. As a result, even if the positional relationship of the exposed core wires 22a and their bonding surfaces are in any direction, ultrasonic bonding can be performed by applying some pressure in the direction in which they are in contact. However, it is not essential that the first direction D1 and the second direction D2 are orthogonal to each other, and the first direction D1 and the second direction may be directions different from each other.
　＜変形例＞
　上記実施形態では、２つの導電部材として、２つの露出芯線２２ａを超音波接合する例で説明したが、３つ以上の導電部材を共通する接合部１３０を介して超音波接合してもよい。 <Modification>
In the above embodiment, an example in which two exposed core wires 22a are ultrasonically bonded as two conductive members is described, but ultrasonic bonding may be performed via a joint portion 130 in which three or more conductive members are common.
　例えば、図１０に示すように、３つの露出芯線２２ａを超音波接合する場合を想定する。この場合、３つの露出芯線２２ａの配置はよりばらつきやすくなる。また、図１１に示すように、ソノトロード５２とアンビルとの間で３つの露出芯線２２ａを加圧した状態で、各露出芯線２２ａの境界面Ｆはソノトロード５２とアンビル本体５４ａとによる加圧方向に対して、各種方向にばらつきやすい。つまり、３つ以上の導電部材が接する方向はばらつきやすい。 For example, as shown in FIG. 10, it is assumed that three exposed core wires 22a are ultrasonically bonded. In this case, the arrangement of the three exposed cores 22a is more likely to vary. Further, as shown in FIG. 11, in the state where the three exposed cores 22a are pressed between the sonotrode 52 and the anvil, the interface F between the exposed cores 22a is in the direction of pressing by the sonotrod 52 and the anvil main body 54a. In contrast, it tends to vary in various directions. That is, the direction in which three or more conductive members are in contact is likely to vary.
　そこで、図１２に示すように、接合部１３０Ｂを回転させて、第１方向Ｄ１とは別の第２方向Ｄ２でも超音波接合を行うことで、接合部１３０を形成する。これにより、各種方向に沿う境界面Ｆにおいて、複数の露出芯線２２ａ同士を十分な接合力で超音波接合することができ、３つ以上の導電部材をなるべく強固に超音波接合できる。 Therefore, as shown in FIG. 12, the bonding portion 130B is rotated, and the bonding portion 130 is formed by performing ultrasonic bonding also in the second direction D2 different from the first direction D1. Thus, the plurality of exposed core wires 22a can be ultrasonically bonded with sufficient bonding force at the boundary surface F along various directions, and ultrasonic bonding of three or more conductive members can be performed as strongly as possible.
　また、図１３及び図１４に示すように、第１方向Ｄ１において超音波接合する際の接合厚み寸法（ソノトロード５２とアンビル本体５４ａとの距離寸法）と、第２方向Ｄ２において超音波接合する際の接合厚み寸法（ソノトロード５２とアンビル本体５４ａとの距離寸法）とが同じになるようにしてもよい。 Also, as shown in FIGS. 13 and 14, when ultrasonic bonding is performed in the second direction D2, the bonding thickness dimension (the distance dimension between the sonotrod 52 and the anvil main body 54a) at the time of ultrasonic bonding in the first direction D1. The joint thickness dimension (the distance dimension between the sonotrode 52 and the anvil body 54a) may be the same.
　ここでは、上記実施形態で説明したアンビル５４は、アンビル本体５４ａに対応するアンビル本体２５４ａと、側方押え片５４ｂに対応する側方押え片２５４ｂとに分割されている。アンビル本体２５４ａは、流体シリンダ（油圧シリンダ、エアシリンダ）、リニアモータ等のリニアアクチュエータによって進退駆動可能に構成され、側方押え片２５４ｂに対する突出方向寸法を調整可能に構成されている。 Here, the anvil 54 described in the above embodiment is divided into an anvil main body 254a corresponding to the anvil main body 54a and a side pressing piece 254b corresponding to the side pressing piece 54b. The anvil main body 254a is configured to be able to drive forward and backward by a linear actuator such as a fluid cylinder (hydraulic cylinder, air cylinder), a linear motor, or the like, and is configured to be able to adjust the protrusion direction dimension with respect to the side pressing piece 254b.
　そして、まず、図１３に示すように、第１方向Ｄ１において複数の露出芯線２２ａ同士を超音波接合して、接合部２３０Ｂを形成する。この際、ソノトロード５２の加圧力、加圧時間等を調整して、接合厚み寸法（ソノトロード５２とアンビル本体５４ａとの距離寸法）が所定の距離Ｌになるように設定する。 Then, first, as shown in FIG. 13, the plurality of exposed core wires 22 a are ultrasonically bonded in the first direction D <b> 1 to form a bonding portion 230 </ b> B. At this time, the pressing force, pressing time, and the like of the sonotrode 52 are adjusted to set the bonding thickness dimension (the distance dimension between the sonotroding 52 and the anvil main body 54a) to be a predetermined distance L.
　次に、図１４に示すように、側方押え片２５４ｂに対するアンビル本体２５４ａの突出寸法を、上記接合部２３０Ｂの第１方向Ｄ１における寸法と同じにし、接合部２３０Ｂをその中心軸周りに９０度回転させて、ソノトロード５２とアンビル本体２５４ａとの間に配設する。そして、第２方向Ｄ２において複数の露出芯線２２ａ同士を超音波接合して、接合部２３０を形成する。この際、ソノトロード５２の加圧力、加圧時間等を調整して、接合厚み寸法（ソノトロード５２とアンビル本体５４ａとの距離寸法）が所定の距離Ｌになるように設定する。 Next, as shown in FIG. 14, the protrusion dimension of the anvil main body 254a with respect to the side pressing piece 254b is made the same as the dimension in the first direction D1 of the joint 230B, and the joint 230B is 90 degrees around its central axis. It is rotated and disposed between the sonotrode 52 and the anvil body 254a. Then, the plurality of exposed core wires 22a are ultrasonically bonded in the second direction D2 to form a bonding portion 230. At this time, the pressing force, pressing time, and the like of the sonotrode 52 are adjusted to set the bonding thickness dimension (the distance dimension between the sonotroding 52 and the anvil main body 54a) to be a predetermined distance L.
　これにより、図１５に示すように、接合部２３０は、横断面が正方形状をなす形状に形成される。 As a result, as shown in FIG. 15, the joint portion 230 is formed in a square shape in cross section.
　この例によると、第１方向Ｄ１での超音波接合工程における接合厚み寸法と、第２方向Ｄ２での超音波接合工程における接合厚み寸法とが同じになるように、ソノトロード５２の加圧力、加圧時間等を調整することができる。このため、一方の調整値を参考に他方の調整を行うことができ、複数の導電部材を複数方向から超音波接合する際の設定等を容易に行える。 According to this example, the pressure applied to the sonotrod 52 and the applied pressure so that the bonding thickness dimension in the ultrasonic bonding step in the first direction D1 is the same as the bonding thickness dimension in the ultrasonic bonding step in the second direction D2. Pressure time etc. can be adjusted. Therefore, the other adjustment can be performed with reference to one adjustment value, and settings etc. when ultrasonically bonding a plurality of conductive members from a plurality of directions can be easily performed.
　また、本実施形態では、２つの電線２０の端部の露出芯線２２ａ同士を互いに相手側に向けた状態で重ね合せて超音波接合する例で説明したが、図１６に示す導電部材の接合構造３１０のように、複数の電線２０の端部の露出芯線２２ａを同じ方向に向けた状態で重ね合せて超音波接合して接合部３３０を形成してもよい。 Further, in the present embodiment, an example has been described in which the exposed core wires 22a of the ends of the two electric wires 20 are overlapped with each other in the state of facing each other, and ultrasonic bonding is performed. As in 310, the exposed core wires 22a at the ends of the plurality of electric wires 20 may be overlapped in the same direction and ultrasonically bonded to form the bonding portion 330.
　また、図１７に示す導電部材の接合構造４１０のように、２つの電線２０の延在方向中間部の露出芯線４２２ａ同士を重ね合せて超音波接合して接合部４３０を形成してもよい。 Alternatively, as in the bonding structure 410 of the conductive members shown in FIG. 17, the exposed core wires 422 a in the middle in the extension direction of the two electric wires 20 may be overlapped and ultrasonically bonded to form the bonding portion 430.
　これらの例において、３つ以上の導電部材が超音波接合されてもよい。また、ある電線の延在方向中間部に露出する露出芯線に、他の電線の端部の露出芯線が超音波接合されてもよい。つまり、複数の導電部材の端部、延在方向中間部を適宜重ね合せて接合して、複数の導電部材の接合構造を形成することができる。 In these examples, three or more conductive members may be ultrasonically bonded. In addition, the exposed core wire of the end of another wire may be ultrasonically bonded to the exposed core wire exposed in the middle in the extension direction of a certain wire. That is, the end portions of the plurality of conductive members and intermediate portions in the extension direction can be appropriately overlapped and joined to form a bonding structure of the plurality of conductive members.
　また、超音波接合は、互いに異なる３つ以上の方向からなされてもよい。 Also, ultrasonic bonding may be performed from three or more different directions.
　複数回の超音波接合は、それぞれ別々の超音波接合装置によってなされてもよい。 The plurality of times of ultrasonic bonding may be performed by separate ultrasonic bonding devices.
　なお、上記実施形態及び各変形例で説明した各構成は、相互に矛盾しない限り適宜組合わせることができる。 In addition, each structure demonstrated by the said embodiment and each modification can be combined suitably, as long as there is no contradiction mutually.
　以上のようにこの発明は詳細に説明されたが、上記した説明は、すべての局面において、例示であって、この発明がそれに限定されるものではない。例示されていない無数の変形例が、この発明の範囲から外れることなく想定され得るものと解される。 As mentioned above, although this invention was explained in detail, the above-mentioned explanation is illustration in all the aspects, and this invention is not limited to it. It is understood that countless variations not illustrated are conceivable without departing from the scope of the present invention.
　１０、３１０、４１０　　導電部材の接続構造
　２０　　電線
　２２　　芯線
　２２ａ、４２２ａ　　露出芯線
　２３　　素線
　２４　　被覆
　３０、１３０、２３０、３３０、４３０　　接合部
　３１、３３　　受面
　３２、３４　　加圧面
　５２　　ソノトロード
　５２ａ　　加圧面
　５３　　超音波振動発生部
　５４　　アンビル
　５４ａ、２５４ａ　　アンビル本体
　５４ａｆ　受面
　Ｄ１　　第１方向
　Ｄ２　　第２方向 DESCRIPTION OF SYMBOLS 10, 310, 410 Connection structure of electrically-conductive member 20 Electric wire 22 Core wire 22a, 422a Exposed core wire 23 Wire 24 Coating 30, 130, 230, 330, 430 Joint part 31, 33 Receiving surface 32, 34 Pressing surface 52 Sonotrode 52a Pressing surface 53 ultrasonic vibration generator 54 anvil 54a, 254a anvil main body 54af receiving surface D1 first direction D2 second direction

Claims (12)

  1. 　複数の導電部材が複数方向からの超音波接合によって接合された接合部を介して接続されている、導電部材の接続構造。 A connection structure of conductive members, wherein a plurality of conductive members are connected via a joint portion joined by ultrasonic bonding from a plurality of directions.
  2. 　請求項１に記載の導電部材の接続構造であって、
    　前記接合部の外周面に、アンビルの受面及びソノトロードによる加圧面が異なる方向において対向するように複数組形成されている、導電部材の接続構造。     It is the connection structure of the electrically-conductive member of Claim 1, Comprising:
    A connecting structure of conductive members, wherein a plurality of sets of receiving surfaces of an anvil and pressing surfaces by sonotrodes are formed to face each other in different directions on an outer peripheral surface of the joint portion.
  3. 　請求項１又は請求項２に記載の導電部材の接続構造であって、
    　前記複数の導電部材のそれぞれは、複数の素線の集合体である、導電部材の接続構造。     It is the connection structure of the electrically-conductive member of Claim 1 or Claim 2, Comprising:
    A connection structure of conductive members, wherein each of the plurality of conductive members is an assembly of a plurality of strands.
  4. 　請求項１から請求項３のいずれか１項に記載の導電部材の接続構造であって、
    　前記複数の導電部材のそれぞれは、芯線と前記芯線を覆う被覆とを含む電線において露出した芯線である、導電部材の接続構造。     It is the connection structure of the electrically-conductive member of any one of Claim 1 to 3, Comprising:
    A connecting structure of conductive members, wherein each of the plurality of conductive members is a core wire exposed in an electric wire including a core wire and a coating covering the core wire.
  5. 　請求項１から請求項４のいずれか１項に記載の導電部材の接続構造であって、
    　前記複数の導電部材は、共通する前記接合部を介して接合された３つ以上の前記導電部材を含む、導電部材の接続構造。     It is the connection structure of the electrically-conductive member of any one of Claim 1-4, Comprising:
    A connection structure of conductive members, wherein the plurality of conductive members include three or more of the conductive members joined via the common joint.
  6. 　請求項１から請求項５のいずれか１項に記載の導電部材の接続構造であって、
    　前記接合部は、前記複数の導電部材が互いに直交する２方向からの超音波接合によって形成された部分である、導電部材の接続構造。     It is the connection structure of the electrically-conductive member of any one of Claims 1-5, Comprising:
    The connection structure of conductive members, wherein the bonding portion is a portion formed by ultrasonic bonding from two directions in which the plurality of conductive members are orthogonal to each other.
  7. 　請求項１から請求項６のいずれか１項に記載の導電部材の接続構造であって、
    　前記接合部は、横断面が正方形状をなす形状に形成されている、導電部材の接続構造。     It is the connection structure of the electrically-conductive member of any one of Claim 1 to 6, Comprising:
    The connecting portion for a conductive member, wherein the connecting portion is formed in a square shape in cross section.
  8. 　（ａ）複数の導電部材を準備する工程と、
    　（ｂ）複数の導電部材を第１方向に沿った方向で加圧した状態で超音波接合する工程と、
    　（ｃ）複数の導電部材を前記第１方向とは異なる第２方向に沿った方向で加圧した状態で超音波接合する工程と、
    　を備える導電部材の接続構造製造方法。     (A) preparing a plurality of conductive members;
    (B) ultrasonically bonding the plurality of conductive members in a state of being pressurized in the direction along the first direction;
    (C) ultrasonically bonding the plurality of conductive members in a state of being pressurized in a direction along a second direction different from the first direction;
    The manufacturing method of the connection structure of the electrically-conductive member provided with these.
  9. 　請求項８に記載の導電部材の接続構造製造方法であって、
    　前記複数の導電部材のそれぞれは、複数の素線の集合体である、導電部材の接続構造製造方法。     A method of manufacturing a conductive member connection structure according to claim 8, wherein
    A method for manufacturing a connection structure of conductive members, wherein each of the plurality of conductive members is an assembly of a plurality of strands.
  10. 　請求項８又は請求項９に記載の導電部材の接続構造製造方法であって、
    　前記工程（ａ）において、前記複数の導電部材として、３つ以上の前記導電部材を準備し、
    　前記工程（ｂ）及び工程（ｃ）のそれぞれにおいて、前記３つ以上の導電部材を超音波接合する、導電部材の接続構造製造方法。     A method for manufacturing a connection structure of a conductive member according to claim 8 or 9, wherein
    In the step (a), three or more of the conductive members are prepared as the plurality of conductive members,
    A method for manufacturing a connection structure of conductive members, wherein the three or more conductive members are ultrasonically bonded in each of the step (b) and the step (c).
  11. 　請求項８から請求項１０のいずれか１項に記載の導電部材の接続構造製造方法であって、
    　前記第２方向は、前記第１方向に対して直交する方向である、導電部材の接続構造製造方法。     A method of manufacturing a conductive member connection structure according to any one of claims 8 to 10, wherein
    The method for manufacturing a connection structure of a conductive member, wherein the second direction is a direction orthogonal to the first direction.
  12. 　請求項８から請求項１１のいずれか１項に記載の導電部材の接続構造製造方法であって、
    　前記工程（ｂ）における接合厚み寸法と、前記工程（ｃ）における接合厚み寸法とが同じになるように設定する、導電部材の接続構造製造方法。     It is a connection structure manufacturing method of the electrically-conductive member of any one of Claims 8-11, Comprising:
    A method for manufacturing a connection structure of conductive members, wherein the bonding thickness dimension in the step (b) and the bonding thickness dimension in the step (c) are set to be the same.
PCT/JP2018/029515 2017-08-17 2018-08-07 Connection structure of conductive member and method for manufacturing connection structure of conductive member WO2019035386A1 (en)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010218796A (en) * 2009-03-16 2010-09-30 Yazaki Corp Ultrasonic bonding method and device therefor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010218796A (en) * 2009-03-16 2010-09-30 Yazaki Corp Ultrasonic bonding method and device therefor

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