JP5427720B2 - Conductive wire coupling method and induction heating device - Google Patents

Description

  The present invention relates to a conductive wire coupling method and an induction heating device for coupling at least two conductive wires.

  2. Description of the Related Art Conventionally, as a method for connecting (connecting) a plurality of conductive wires constituting a motor and electrically connecting them, a method by heat caulking (fusing) is generally known. For example, in Patent Document 1, a conducting wire (winding) is fused and welded to a connecting member, and the conducting wires (winding) are electrically connected to each other via a bus ring.

JP 2009-17666 A

However, as in Patent Document 1, in order to couple (connect) the conducting wires by caulking, the connecting member is sandwiched between the electrodes, and the connecting member is heated by flowing current through the electrodes. At that time, the insulation of the conductive wire is also melted at the same time. Then, the melt | dissolved insulation coating (sledge) will be crimped in the state pinched | interposed between the connection member and the conducting wire, and there exists a problem that favorable electricity supply with a connecting member and a conducting wire is inhibited.
In addition, it is necessary to use an expensive member such as tungsten having high heat resistance for the electrode, and it is necessary to use a connecting member for coupling the conductive wires, resulting in an increase in cost.

  Therefore, the present invention has been made in view of the above circumstances, and provides a wire coupling method and an induction heating device that can achieve good energization by reliably connecting wires without cost. To do.

  In order to solve the above-described problem, the invention described in claim 1 is a method of connecting at least two conductors (for example, the conductor 51 in the embodiment), and includes an opening (for example, the opening in the embodiment). 35) A conductor bundle (for example, the conductor in the embodiment) in which the at least two conductors are bundled in parallel with an annular coil (for example, the induction heating coil 21 in the embodiment) arranged so that the direction is aligned with the vertical direction. The bundle 50) is inserted into the center of the opening of the coil (for example, the center C in the embodiment), and the coil is opposed to the inner peripheral surface of the coil by passing an alternating current through the coil. And a step of inductively heating the part to melt the conducting wire and bonding the conducting wires together.

  According to a second aspect of the present invention, the coil has a hollow cross-sectional shape in which a hollow portion (for example, the first hollow portion 36 in the embodiment) is formed, and cooling water is passed through the hollow portion. It is characterized by doing.

  The invention described in claim 3 is characterized in that the coil is moved relative to the wire bundle while passing an alternating current through the coil in a state where the position of the wire bundle is fixed.

  The invention described in claim 4 is characterized in that, in the induction heating range of the wire bundle, the heating amount at the lower part is made smaller than the heating amount at the upper part of the wire bundle.

  The invention described in claim 5 is characterized in that an insulating coating (for example, the insulating coating 52 in the embodiment) in the induction heating range of the conductive wire is stripped before the conductive wire bundle is induction heated.

  The invention described in claim 6 is characterized in that air is blown onto the conductor bundle after the insulation coating of the conductor is peeled off.

  The invention described in claim 7 is characterized in that after the conducting wires are coupled to each other, air is sprayed onto the conducting wire bundle.

  The invention described in claim 8 is characterized in that an upper end portion of the conductor bundle is formed in a convex shape or a concave shape, and the upper end portion is induction-heated to couple the conductive wires.

  The invention described in claim 9 is an induction heating device (for example, the induction heating device 20 in the embodiment) that couples at least two conducting wires, and the opening direction in which the at least two conducting wires can be inserted is a vertical direction. And an umbrella-shaped coil (for example, the umbrella-type induction heating coil 121 in the embodiment) that increases as the opening diameter of the opening becomes lower, and an alternating current that supplies an alternating current to the umbrella-shaped coil And a power supply device (for example, the power supply 24 in the embodiment).

  According to the first aspect of the present invention, since the conductor of the conductor bundle is melted by self-heating by the induced current in the state of being arranged in the center of the annular coil, the peripheral surface of the conductor bundle is circumferential. Dissolves almost evenly. Also, since the wire bundle is positioned so as to face the top and bottom direction, the melted conductor member hangs down vertically due to its own weight, and the melted conductor member joins the uncoupled portion of the conductor located below the melted portion. To do. Therefore, at least two conductors can be coupled without using a connecting member or the like as in the prior art and without using an electrode formed of tungsten or the like. Furthermore, since conducting wire member itself is melt | dissolved and conducting wires are couple | bonded, conducting wires are reliably couple | bonded (connected) and favorable electricity supply can be implement | achieved.

  According to the invention described in claim 2, the coil can be cooled efficiently.

  According to the invention described in claim 3, by fixing the wire bundle and relatively moving the coil, a desired region of the wire bundle can be continuously melted to join the wires together. Further, since the position of the conductor bundle is fixed, it is possible to prevent the dissolved conductor member from drooping to an undesired location.

  According to the invention described in claim 4, the upper part of the conductor bundle is heated to a high temperature at which the conductor member dissolves, and the lower part of the conductor bundle is held in a preheated state at a temperature at which the conductor member does not dissolve. Can do. Therefore, since the melt | dissolved conducting wire member solidifies reliably in the location which preheated, conducting wires can be couple | bonded reliably.

  According to the fifth aspect of the present invention, it is possible to prevent the insulating coating from being mixed in the conductor connecting portion by peeling off the insulating coating before induction heating the conductor bundle. Therefore, the conducting wires are reliably coupled (connected), and good energization can be realized.

  According to the invention described in claim 6, after the insulation coating is peeled off before induction heating the conductor bundle, the insulation coating is mixed in the conductor coupling portion by blowing air to the portion. It can prevent more reliably. Therefore, the conducting wires are reliably coupled (connected), and good energization can be realized.

  According to the seventh aspect of the present invention, after the conductor bundle is induction-heated, the conductor coupling portion can be immediately cooled without moving the conductor bundle by blowing air onto the portion. Therefore, the shape of the lead wire coupling portion can be solidified in a desired shape.

  According to the invention described in claim 8, when a plurality of conductor bundles are induction-heated to join the conductors, the tip of the conductor bundle is processed into a convex shape, thereby melting from the center of the conductor bundle. Can do. Further, by processing the tip of the conductor bundle into a concave shape, the melted outer peripheral portion of the conductor member flows into the central portion of the conductor bundle, and the center of the conductor bundle is preheated by the dissolved conductor member, and then the conductor bundle By inductively heating the outer circumference of the wire bundle, a substantially uniform welded state can be created on both the inner and outer circumferences of the wire bundle. Therefore, the conductors of the conductor bundle can be connected substantially uniformly by processing the tip of the conductor bundle into a convex shape or a concave shape.

  According to the invention described in claim 9, the conductor located on the upper side of the umbrella-shaped coil can be heated to a high temperature at which the conductor member melts, and at the same time the conductor located on the lower side of the umbrella-shaped coil Although it is a temperature at which the conducting wire member does not melt, it can be held in a preheated state. Therefore, since the melt | dissolved conducting wire member solidifies reliably in the location which preheated, conducting wires can be couple | bonded reliably.

It is a schematic block diagram of the conducting wire coupling system in embodiment of this invention. It is a schematic structure front view of the induction heating apparatus in the embodiment of the present invention. It is a perspective view of the induction heating coil in the embodiment of the present invention. It is sectional drawing which follows the AA line of FIG. It is (a) top view and (b) side view of a chuck member in an embodiment of the present invention, and is a figure showing the state where the 1st chuck member and the 2nd chuck member separated. It is (a) top view and (b) side view of a chuck member in an embodiment of the present invention, and shows the state in the middle of moving from the state where the 1st chuck member and the 2nd chuck member separated to the state where it approached FIG. It is (a) top view and (b) side view of a chuck member in an embodiment of the present invention, and is a figure showing the state where the 1st chuck member and the 2nd chuck member approached (contacted). It is the (a) top view and (b) side view of the covering stripping blade member in the embodiment of the present invention, showing the state where the first blade member and the second blade member are separated. It is (a) top view and (b) side view of a chuck member in an embodiment of the present invention, and is a figure showing the state where the 1st chuck member and the 2nd chuck member contacted by pressure. It is a flowchart which shows the method of couple | bonding the wire bundle in embodiment of this invention. It is a perspective view which shows the state before the coupling | bonding of the conducting wire bundle in embodiment of this invention. It is a perspective view which shows the state after the coupling | bonding of the conducting wire bundle in embodiment of this invention. It is a figure which shows the result of having scanned the connection state of the connection part vicinity of a conducting wire bundle in embodiment of this invention with a predetermined pitch. It is a figure which shows another aspect (1) of the conducting wire bundle at the time of couple | bonding the conducting wire bundle comprised by multiple conducting wires in embodiment of this invention. It is a figure which shows another aspect (2) of the conducting wire bundle at the time of couple | bonding the conducting wire bundle comprised with multiple conducting wires in embodiment of this invention. It is a top view which shows another aspect of the induction heating coil in embodiment of this invention. It is sectional drawing which follows the BB line of FIG.

Next, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a configuration diagram of a conducting wire coupling system according to an embodiment of the present invention. As shown in FIG. 1, the lead wire coupling system 10 includes an induction heating device 20 including an induction heating coil 21, a power supply control unit 11 that controls the current and frequency applied to the induction heating coil 21, and an induction heating coil 21. A cooling water control unit 12 that controls the amount of cooling water to be supplied and an induction heating coil integrated control unit 13 that controls the position control of the induction heating coil 21 and the air supply amount are provided.

  As shown in FIGS. 1 and 2, the induction heating device 20 includes an induction heating coil 21 having a substantially annular shape in plan view, an induction heating coil support member 22 that supports the induction heating coil 21, and the support member 22 connected to each other. An induction heating coil support shaft 23 for moving the induction heating coil 21 up and down in a substantially vertical direction, a motor 41 for moving the induction heating coil 21 up and down, and a power source for applying an alternating current to the induction heating coil 21 24, a chuck member 25 that supports and fixes a conductor bundle 50 in which a plurality of conductors 51 are bundled, a chuck member support shaft 26 that supports the chuck member 25, and a stripping blade member 27 that strips the insulating coating 52 of the conductor 51. A blade support member 28 that supports the coating stripping blade member 27, and the blade support member 28 is connected to move the coating stripping blade member 27 up and down in a substantially vertical direction. A blade support shaft 29, a power source (not shown) for driving a motor (not shown) provided on the coating stripping blade member 27, a pump 30 for supplying cooling water to the induction heating coil 21, and cooling water. A cooling water tank 31 to be stored, a fan (not shown) that supplies air to the induction heating coil 21, and an air adjustment valve 32 that adjusts the amount of air to be supplied are provided.

  As shown in FIG. 3, the induction heating coil 21 is a metal annular coil, and is arranged in the induction heating device 20 so that the direction of the opening 35 is aligned with the top-to-bottom direction. The opening 35 has a cylindrical opening shape whose opening diameter is substantially the same over the entire axial length of the opening 35. The induction heating coil 21 is connected to a power source 24 and is configured to be applied with an alternating current. A power supply control unit 11 is connected to the power supply 24 so that a desired alternating current can be applied to the induction heating coil 21 in accordance with an instruction from the power supply control unit 11.

  In addition, as shown in FIG. 4, the induction heating coil 21 has two cavities 36 and 38 formed along the circumferential direction so that cooling water can flow through the first cavity 36 on the outer peripheral side. A cooling water pipe 37 is connected. The cooling water pipe 37 is provided with a pump 30, and is configured to circulate and use the cooling water stored in the cooling water tank 31. Further, the cooling water control unit 12 is connected to the pump 30 so that the flow rate can be adjusted by inverter-controlling the pump 30 based on values of a temperature sensor and a flow meter (not shown) provided in the cooling water pipe 37. It is configured. The cooling water pipe 37 is provided with a heat exchanger so that the cooling water can be maintained at a desired temperature.

  An air supply pipe 39 is connected to the second cavity 38 on the inner peripheral side so that air can flow. The air supply pipe 39 is provided with an air adjustment valve 32 so that the pressure (flow rate) of air can be adjusted. A plurality of small diameter air ejection holes 40 penetrating the peripheral surface of the opening 35 are formed on the inner peripheral side of the second cavity portion 38. That is, the air supplied to the second cavity 38 is configured to be ejected from the air ejection hole 40 to the opening 35. The air adjustment valve 32 is connected to the induction heating coil integrated control unit 13 and is configured to be able to adjust the air supply amount by controlling the valve opening.

  The induction heating coil 21 is provided with a motor 41 for adjusting the vertical position of the induction heating coil 21. The induction heating coil integrated control unit 13 is connected to the motor 41, and the motor 41 is driven by an instruction from the induction heating coil integrated control unit 13 so that the height of the induction heating coil 21 can be arranged at a desired position. It has become. When the motor 41 is driven, the induction heating coil 21 is configured to move substantially vertically up and down along the induction heating coil support shaft 23.

  Furthermore, the induction heating coil integrated control unit 13 is connected to a power supply control unit 11 and a cooling water control unit 12 so that the units 11 and 12 can be controlled in a comprehensive manner.

  Subsequently, returning to FIG. 2, a chuck member 25 that supports the wire bundle 50 is disposed below the induction heating coil 21 of the induction heating device 20. The chuck member 25 is supported by the chuck member support shaft 26, and the position in the height direction is fixed. By holding the wire bundle 50 with the chuck member 25, the wire bundle 50 is configured to be positioned at the center C of the opening 35 of the induction heating coil 21.

  As shown in FIGS. 5 to 7, the chuck member 25 includes a pair of members (a first chuck member 43 and a second chuck member 44) so as to sandwich the wire bundle 50 from both sides in plan view. The first chuck member 43 and the second chuck member 44 are members formed in a substantially symmetrical shape, and are configured to be movable toward and away from each other. In addition, an opening 45 is formed between the first chuck member 43 and the second chuck member 44 in a state where the first chuck member 43 and the second chuck member 44 are close to each other, and the conductor bundle 50 is supported by the opening 45. It is configured to be fixed. Further, the tip portion 46 of the first chuck member 43 that protrudes toward the second chuck member 44 is formed with a curved portion 47 so that the conducting wire 51 can be smoothly guided into the opening 45. Yes. Similarly, the tip 48 of the second chuck member 44 that is formed to project toward the first chuck member 43 is formed with a curved portion 49 so that the lead wire 51 can be smoothly guided into the opening 45. ing.

  Subsequently, referring back to FIG. 2, a stripping blade member 27 for stripping the insulating coating 52 of the wire bundle 50 is disposed between the induction heating coil 21 and the chuck member 25 of the induction heating device 20. The stripping blade member 27 is supported by a blade support member 28. The blade support member 28 is supported by a blade support shaft 29 so as to be movable in the vertical direction. That is, the coating stripping blade member 27 is configured to be movable in the vertical direction.

  As shown in FIGS. 8 and 9, the coating stripping blade member 27 is composed of a pair of members (a first blade member 53 and a second blade member 54) so as to sandwich the wire bundle 50 from both sides in plan view. The first blade member 53 and the second blade member 54 are members formed in a substantially symmetrical shape, and are configured to be movable in directions that are close to and away from each other. Further, an opening 55 is formed between the first blade member 53 and the second blade member 54 in a state where the first blade member 53 and the second blade member 54 are close to each other, and the conductor bundle 50 is supported by the opening 55. It is configured to be fixed. Further, the first blade member 53 and the second blade member 54 are configured to be able to pressurize in a direction close to each other so that the conductor bundle 50 disposed in the opening 55 is surely brought into contact with the peripheral surface of the opening 55. Yes. Further, a cutter portion 56 is formed at a location where the opening 55 is formed in the first blade member 53 and the second blade member 54. That is, when the stripping blade member 27 is moved in the vertical direction in a state where the conductor bundle 50 is in pressure contact with the peripheral surface of the opening 55, the cutter portion 56 can strip the insulating coating 52 of the conductor 51. It is configured. The tip portion 57 of the first blade member 53 that protrudes toward the second blade member 54 is formed with a curved portion 58 so that the conducting wire 51 can be smoothly guided into the opening 55. Yes. Similarly, the tip portion 59 of the second blade member 54 that is formed to project toward the first blade member 53 is formed with a curved portion 60 so that the conducting wire 51 can be smoothly guided into the opening 55. ing.

  Next, a method of coupling the conductors 51 of the conductor bundle 50 using the induction heating device 20 will be described with reference to the flowchart of FIG.

  As shown in FIG. 10, in step S1, a conductor bundle 50 in which a plurality of conductors 51 are bundled is prepared, and the process proceeds to step S2.

  In step S <b> 2, the wire bundle 50 is set in the induction heating device 20. First, the lead wire bundle 50 is supported and fixed using the chuck member 25, and the process proceeds to step S3. At this time, the first chuck member 43 and the second chuck member 44 of the chuck member 25 are brought close to each other to hold the conductor bundle 50 in a predetermined position.

  In step S3, the conductor bundle 50 is held using the coating stripping blade member 27 within the range of induction heating in the conductor bundle 50, and the peripheral surface of the conductor bundle 50 is brought into contact with the cutter portion 56 of the opening 55. Hold under pressure. Thereafter, the coating stripping blade member 27 is moved in the vertical direction, so that the insulating coating 52 of the conductive wire 51 is stripped and the process proceeds to step S4. In addition, the range which peels the insulation coating 52 of the conducting wire 51 may be a substantially the same range as the range which performs induction heating.

  In step S4, after stripping the insulation coating 52 of the conducting wire 51, the coating stripping blade member 27 is moved downward, and the peripheral surface of the opening 35 of the induction heating coil 21 is connected to the conductor bundle 50 from which the insulation coating 52 is stripped. The induction heating coil 21 is set at a predetermined position so as to face each other, and the process proceeds to step S5.

  In step S <b> 5, air is supplied to the second cavity 38 of the induction heating coil 21, air is ejected from the air ejection holes 40 toward the conductor bundle 50, and the insulating coating 52 shavings remaining in the conductor bundle 50 are removed. And the process proceeds to step S6.

  In step S6, the induction heating coil 21 is moved up and down so as to be in a predetermined position, an alternating current is applied to the induction heating coil 21 to inductively heat the wire bundle 50, and the process proceeds to step S7. At this time, cooling (temperature adjustment) of the induction heating coil 21 is performed by appropriately flowing cooling water through the first cavity 36.

  In step S7, in a state where an alternating current is applied to the induction heating coil 21, the induction heating coil 21 is moved from the upper side to the lower side, and a predetermined range of the conductive wire bundle 50 is induction heated, thereby melting the conductive wire 51. To connect the conductors together. At this time, since the conductor bundle 50 is held in the vertical direction, the melted member of the conductor 51 hangs down due to gravity, and a predetermined range of the conductor bundle 50 is joined substantially evenly in plan view. I can go. When the connection between the conducting wires is completed, the process proceeds to step S8.

  In step S8, when the connection of the conductive wires by induction heating is completed, the energization to the induction heating coil 21 is terminated, and the process proceeds to step S9.

  In step S <b> 9, air is supplied to the second cavity 38 of the induction heating coil 21, and air is ejected from the air ejection holes 40 toward the conductor bundle 50 to cool the conductor bundle 50. When the cooling of the conductor bundle 50 is completed, the process proceeds to step S10.

  In step S10, after the cooling of the conductor bundle 50 is completed, the conductor bundle 50 is removed from the induction heating device 20 by moving the first chuck member 43 and the second chuck member 44 of the chuck member 25 away from each other. The lead wire bundle 50 is joined (welding of the lead wires) is completed.

  Here, FIG. 11 is a diagram showing a state before the conductor bundle 50 is joined, and FIG. 12 is a diagram showing a state after the conductor bundle 50 is joined. As shown in FIG. 11 and FIG. 12, by dissolving the lead wire 51 with the induction heating device 20 and bonding the region where the insulating coating 52 is peeled off at the tip of the lead wire bundle 50 in which the four lead wires 51 are bundled, It can be seen that a connecting portion 61 is formed at the tip of the conductor bundle 50 and that the four conductors 51 are like one conductor.

  FIG. 13 shows the result of scanning the vicinity of the coupling portion of the conductor bundle 50 coupled as shown in FIG. In addition, in FIG. 13, the state of the location which is approaching the coupling | bond part (front-end | tip part) is shown, so that a figure number becomes large. As shown in FIG. 13, four conductive wires 51 can be confirmed in a region where the conductive wires are not melt-bonded, and the conductive wires gradually start to bond as approaching the coupling portion, and one wire is formed at the tip portion (coupling portion). It can be seen that they are connected like the lead wires.

  Furthermore, when the number of the conducting wires 51 constituting the conducting wire bundle 50 is increased, it is expected that it takes time to dissolve the conducting wires 51 located near the center of the conducting wire bundle 50. Therefore, in the case where there are a large number of conductors 51, the tip of the conductor bundle 50 is configured to have a convex shape near the center as shown in FIG. 14, or the tip of the conductor bundle 50 as shown in FIG. It is good to comprise so that the center vicinity may become concave shape.

  As shown in FIG. 14, by making the vicinity of the center of the tip 63 of the conductor bundle 50 convex, the conductor 51 located near the center of the conductor bundle 50 can be easily dissolved. Further, as shown in FIG. 15, by processing the vicinity of the center of the distal end portion 64 of the conductor bundle 50 into a concave shape, the melted member of the conductor 51 in the peripheral portion flows into the center portion of the conductor bundle 50, and the conductor bundle 50 The vicinity of the center of the lead wire 51 is preheated by the melted member of the conducting wire 51, and then the periphery of the conducting wire bundle 50 is induction-heated, whereby a substantially uniform welded state can be created on both the inner and outer circumferences of the conducting wire bundle 50. Therefore, the conductors 51 of the conductor bundle 50 can be coupled substantially uniformly by processing the tip of the conductor bundle 50 into a convex shape or a concave shape.

  According to the present embodiment, the conducting wire 51 of the conducting wire bundle 50 is melted by self-heating by the induced current in a state of being arranged at the center of the opening 35 of the annular induction heating coil 21. Dissolves substantially evenly along the circumferential direction. Further, since the conductor bundle 50 is positioned so as to face the top-and-bottom direction, the melted conductor member hangs down vertically by its own weight, and the conductor uncoupled portion where the melted conductor member is located below the melted portion is provided. Join. Therefore, the plurality of conductive wires 51 can be coupled without using a connection member or the like as in the prior art and without using an electrode formed of tungsten or the like. Furthermore, since conducting wire member itself is melt | dissolved and conducting wires are couple | bonded, conducting wires are reliably couple | bonded (connected) and favorable electricity supply can be implement | achieved.

  In addition, by causing the cooling water to flow through the first cavity 36 of the induction heating coil 21, the induction heating coil 21 can be efficiently cooled.

  In addition, since the induction heating device 20 is configured to move in the vertical direction while passing an alternating current through the induction heating coil 21 with the position of the wire bundle 50 fixed, a desired region of the wire bundle 50 is continuously formed. It can melt | dissolve in and can couple | bond the conducting wires 51. Moreover, since the position of the conducting wire bundle 50 is fixed, it is possible to prevent the dissolved conducting wire member from dripping to an undesired location.

  Further, in the induction heating range of the conductor bundle 50, since the lower heating amount is less than the upper heating amount of the conductor bundle 50, the upper portion of the conductor bundle 50 is heated to a high temperature at which the conductor member dissolves, and at the same time The lower part of the bundle 50 can be held in a preheated state at a temperature at which the conducting wire member does not melt. Therefore, since the melt | dissolved conducting wire member solidifies reliably in the location which preheated, conducting wire 51 can be couple | bonded reliably.

  Further, since the insulating coating 52 in the induction heating range of the conductive wire 51 is peeled before the conductive wire bundle 50 is induction-heated, it is possible to prevent the insulating coating 52 from being mixed in the conductive wire coupling portion. Therefore, the conducting wires 51 are reliably coupled (connected), and good energization can be realized.

  Further, since the structure is such that air is blown onto the conductor bundle 50 after the insulation coating 52 of the conductor 51 is peeled off, the shavings of the insulation coating 52 can be reliably removed, and the insulation coating 52 is mixed in the conductor coupling portion. It can prevent more reliably that it will be in the state which became. Therefore, the conducting wires 51 are reliably coupled (connected), and good energization can be realized.

  And since it comprised so that air could be sprayed on the wire bundle 50 after couple | bonding the conducting wires 51, the conducting wire coupling | bond part can be cooled immediately, without moving the wire bundle 50. FIG. Therefore, the shape of the lead wire coupling portion can be solidified in a desired shape.

  The technical scope of the present invention is not limited to the above-described embodiment, and includes various modifications made to the above-described embodiment without departing from the spirit of the present invention. That is, the specific structure and configuration described in the embodiment are merely examples, and can be changed as appropriate.

  For example, in the present embodiment, the opening 35 of the induction heating coil 21 has been described in the case of adopting a cylindrical opening shape whose opening diameter is substantially the same over the entire length of the opening 35. As shown in FIG. 17, an umbrella-type induction heating coil 121 that increases as the opening diameter of the opening 135 becomes lower may be used. By using such an umbrella-type induction heating coil 121, a location located on the upper side of the umbrella-type induction heating coil 121 can be heated to a high temperature at which the conducting wire member of the location is dissolved, and at the same time, umbrella-type induction heating The part located on the lower side of the coil 121 can be held in a preheated state although it is at a temperature at which the conducting wire member at the part does not melt. Therefore, since the melt | dissolved conducting wire member droops below and solidifies reliably in the preheated location, conducting wire 51 can be combined reliably.

  DESCRIPTION OF SYMBOLS 20 ... Induction heating apparatus 21 ... Induction heating coil (coil) 24 ... Power supply (alternating current energization apparatus) 35 ... Opening 36 ... 1st cavity part (cavity part) 50 ... Conductor bundle 51 ... Conductor 52 ... Insulation coating 121 ... Umbrella type Induction heating coil (umbrella coil) C ... Center

Claims (9)

A wire coupling method for coupling at least two wires,
Inserting a wire bundle in which the at least two wires are bundled in parallel into the center of the opening of the coil in an annular coil arranged so that the opening direction is aligned with the top and bottom direction;
A step of inductively heating a portion of the wire bundle facing the inner peripheral surface of the coil by passing an alternating current through the coil to melt the wire and coupling the wires together. Conductive wire coupling method characterized by the above.   The wire coupling method according to claim 1, wherein the coil has a hollow cross-sectional shape with a hollow portion formed therein, and cooling water is passed through the hollow portion.   3. The wire coupling method according to claim 1, wherein the coil is moved relative to the wire bundle while passing an alternating current through the coil in a state where the position of the wire bundle is fixed.   The lead wire coupling method according to any one of claims 1 to 3, wherein, in the induction heating range of the lead wire bundle, the lower heating amount is less than the upper heating amount of the lead wire bundle.   The lead wire coupling method according to any one of claims 1 to 4, wherein an insulation coating in an induction heating range of the lead wire is removed before the lead wire bundle is induction heated.   6. The method of coupling conductive wires according to claim 5, wherein after the insulation coating of the conductive wires is peeled off, air is sprayed onto the bundle of conductive wires.   The wire connecting method according to any one of claims 1 to 6, wherein after the wires are connected, air is sprayed onto the wire bundle.   The lead wire coupling method according to claim 1, wherein an upper end portion of the lead wire bundle is formed in a convex shape or a concave shape, and the upper end portion is induction-heated to join the lead wires. An induction heating device for coupling at least two wires,
An umbrella-shaped coil that is arranged so that the opening direction through which the at least two conducting wires can be inserted is aligned with the top-and-bottom direction, and the opening diameter of the opening becomes lower;
An induction heating device comprising: an alternating current energizing device for energizing the umbrella coil with an alternating current.