JP2009087836A - Method and device for welding terminal of flat cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and device for welding a terminal of a flat cable in which a connecting terminal can be connected to a conductor in a secure and good state, and efficiency of work can be improved by cutting down a process and a time required for connecting work. <P>SOLUTION: A bus bar 4 is placed face to face with rectangular conductors 2 disposed at the connection spot A of a flat cable 1 and is pressed against a resin film 3 on its top face side, the terminal side electrode 6 of a terminal welding device 5 is pressed against the bus bar 4, and a cable side electrode 7 is pressed against the resin film 3 on the lower surface side. The resin film 3 in the portion against which the bus bar 4 is pressed by the terminal side electrode 6 is heated and dissolved, the resin film 3 in the portion against which the electrode 7 is pressed by the cable side electrode 7 is heated and dissolved, and the bus bar 4 and the cable side electrode 7 are brought into contact with the rectangular conductor 2 so that a current can be carried through. A current is carried between the terminal side electrode 6 and the cable side electrode 7 to apply resistance welding to the contact part of the rectangular conductor 2 and the bus bar 4 so that a current can be carried through the contact part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a terminal welding method and a terminal welding apparatus for a flat cable used for wiring of various electrical components mounted in a vehicle or wiring in an electric device, for example.

  Conventionally, as a method of connecting the flat cable and the connection terminal, for example, after removing the coating material covering the core wire end of the flat cable by laser light irradiation, the connector connection terminal is connected to the core wire from which the coating material has been removed. There is a method of connecting a flat cable and a connector of Patent Document 1 in which the core wire of the flat cable and the connection terminal of the connector are joined by irradiating a laser beam in a state where the contact is made.

Japanese Patent Publication No. 8-17108

  However, in the connection method, when connecting the connector connection terminal to the core wire from which the coating material of the flat cable has been removed, the coating material of the portion to which the connector connection terminal is connected is removed with a laser beam, or For example, it must be removed in advance by peeling, excising, etc., and it takes time and effort to remove the covering material. In addition, when removed by laser light, peeled off, or cut away, the dust of the covering material tends to remain on the core wire, causing connection failure.

  In view of the above problems, the present invention can connect a connection terminal to a conductor in a reliable and good state, reduce the steps and time required for the connection work, and improve the work efficiency. An object of the present invention is to provide a terminal welding method and a terminal welding apparatus therefor.

  The present invention relates to a flat cable terminal welding method in which a connection terminal is connected to a conductor covered with a resin film having flexibility and insulation so as to be energized, and a conductor disposed at a connection portion of the flat cable; Oppositely, the connection terminal is pressed against one surface of a resin film covering the conductor, the terminal-side electrode is pressed against the connection terminal facing the conductor at the connection location, and the resin facing the conductor at the connection location After pressing the cable side electrode to the other surface of the film, the terminal side electrode generates heat when energized to heat the connection terminal, melt the resin film of the portion where the connection terminal is pressed, Resin film of the portion where the terminal is brought into contact with the conductor in an energizable state, and the cable side electrode generates heat when energized and the cable side electrode is pressed After melting and bringing the cable side electrode into contact with the conductor in an energizable state, the conductor and the connection terminal are connected to the terminal side electrode and the cable side electrode connected by the conductor and the connection terminal. It is a flat cable terminal welding method in which a current necessary for resistance welding is applied to the contact portion between the conductor and the connection terminal so that the contact portion can be energized.

  As an aspect of the present invention, a weak current is passed through the terminal-side electrode and the cable-side electrode, and the electrical connection between the electrodes that occurs when the conductor and the connection terminal are brought into contact with each other in a state where current can be passed. When the change is detected by the energization detection means, and the detection signal that detects the electrical change is output from the energization detection means, between the terminal side electrode and the cable side electrode connected by the conductor and the connection terminal. On the other hand, a current necessary for resistance welding can be applied.

  Further, the present invention is a flat cable terminal welding apparatus for connecting a connection terminal to a conductor covered with a resin film having flexibility and insulation so as to be energized. The connection terminal is disposed on one surface of a resin film that covers the conductor facing the conductor, and a terminal-side electrode that is pressed against the connection terminal is provided facing the conductor at the connection location, A cable-side electrode that is pressed against the other surface of the resin film is provided facing the conductor, and the terminal-side electrode is pressed when the terminal-side electrode is pressed against the connection terminal and the cable-side electrode is pressed against the resin film. Necessary to generate heat at a temperature at which the resin film in the portion where the connection terminal and the cable side electrode are pressed is melted against the cable side electrode A first energization means for energizing current is provided, and when the conductor and the connection terminal are brought into contact with each other in a state where energization is possible, the terminal-side electrode and the cable-side electrode connected by the conductor and the connection terminal A flat cable terminal welding apparatus provided with second energization means for energizing a current necessary for resistance welding of the contact portion between the conductor and the connection terminal.

  As an aspect of the present invention, a weak current is passed through the terminal-side electrode and the cable-side electrode, and an electrical change between the electrodes that occurs when the conductor and the connection terminal are brought into contact with each other in a state where current can be passed. An energization detection means for detecting is provided, and an energization circuit of the second energization means connected to each electrode can be opened and closed based on a detection signal output from the energization detection means.

  The flat cable is, for example, a portion in which one conductor is covered with a resin film, or a portion in which each conductor is not sandwiched between a pair of resin films and a plurality of conductors arranged in parallel. Each of the resin films can be formed by integrally bonding them.

  The conductor can be composed of a conductive metal conductor such as a flat conductor or a round conductor. The resin film can be formed of a thin resin film having flexibility and insulation.

  Further, the connection terminal can be constituted by, for example, a bus bar formed in a width corresponding to one conductor. The energization detecting means can be constituted by an energization detecting circuit that detects electrical changes such as resistance, current, voltage, and the like. Moreover, the terminal welding apparatus can be comprised with the resistance welding apparatus etc. which weld the metal conductor which has electroconductivity, and a connection terminal, for example. As a method other than resistance welding, for example, ultrasonic welding, thermocompression bonding, spot welding, soldering, or the like can be used.

  According to this invention, after pressing the connection terminal to one surface of the resin film covering the conductor of the flat cable, pressing the terminal side electrode to the connection terminal, after pressing the cable side electrode to the other surface of the resin film, The resin film in the portion where the connection terminal and the cable side electrode are pressed is dissolved, and the connection terminal and the cable side electrode are brought into contact with the conductor. After that, current is passed through the terminal side electrode and the cable side electrode connected by the conductor and the connection terminal, and the contact portion between the conductor and the connection terminal is resistance welded so that current can be passed. The connection terminal can be connected in a reliable and favorable state. Moreover, since the work of removing the resin film and the work of connecting the connection terminals can be performed substantially simultaneously in one step, the labor and work of removing the resin film of the portion to which the connection terminals are connected in advance are required. It is possible to save work, reduce the process and time required for the connection work, and improve work efficiency.

  The purpose of this invention is to be able to connect the connection terminal to the conductor of the flat cable in a reliable and good state, to reduce the steps and time required for the connection work, and to improve the work efficiency. By melting the resin film of the portion where the connection terminal and the cable side electrode are pressed, the connection terminal and the cable side electrode are brought into contact with the conductor, and the contact portion between the conductor and the connection terminal is resistance-welded so as to be energized. Achieved.

  An embodiment of the present invention will be described in detail with reference to the drawings.

  The drawing shows a terminal welding method of a flat cable and its terminal welding apparatus used when a bus bar is connected to a conductor covered with a resin film having flexibility and insulation. 1 to 4, the terminal welding method for the flat cable 1 is a resin film on the upper surface side that covers the flat conductor 2 so as to face the flat conductor 2 disposed at the connection point A of the flat cable 1. After the bus bar 4 is pressed onto 3, the terminal side electrode 6 of the terminal welding device 5 is pressed against the bus bar 4 facing the flat conductor 2 at the connection point A, and the cable is applied to the resin film 3 on the lower surface side facing the flat conductor 2. The side electrode 7 is pressed.

  The connecting portion A of the flat cable 1 where the flat conductor 2 and the bus bar 4 face each other is pressed between the terminal side electrode 6 and the cable side electrode 7 and pressed, and then the terminal side electrode 6 generates heat when energized. Then, the bus bar 4 is heated, and the resin film 3 in the portion where the bus bar 4 is pressed is dissolved. At the same time, the cable-side electrode 7 generates heat when energized, and the resin film 3 in the portion where the cable-side electrode 7 is pressed is dissolved. Thereby, the bus bar 4 and the cable-side electrode 7 are brought into contact with the flat conductor 2 in a state where electricity can be supplied.

  Immediately after this, a current necessary for resistance welding is applied between the terminal-side electrode 6 and the cable-side electrode 7 connected by the rectangular conductor 2 and the bus bar 4, and the contact portion between the rectangular conductor 2 and the bus bar 4 is passed. It is resistance-welded so that it can be energized.

  For example, after dissolving the resin film 3 in the portion where the bus bar 4 is pressed, the resin film 3 in the portion where the cable side electrode 7 is pressed is dissolved. Or after melt | dissolving the resin film 3 of the part by which the cable side electrode 7 was pressed, you may melt | dissolve in order by melt | dissolving the resin film 3 of the part by which the bus bar 4 was pressed.

  In the embodiment, the bus bars 4 arranged orthogonal to the length direction of the flat conductors 2 are connected to the flat conductors 2 of the same width arranged in parallel at a predetermined pitch interval. Although an example has been described, for example, when connecting each of the rectangular conductors 2... To each bus bar 4 formed in a corresponding width, each of the bus bars 4... The electrodes 6 and 7 are arranged.

  When each bus bar 4 is connected to each of the rectangular conductors 2 arranged in parallel at different pitch intervals, each bus bar 4 is connected to each of the rectangular conductors 2 at a pitch interval corresponding to each of the rectangular conductors 2. The electrodes 6 and 7 of the welding device 5 are arranged.

  When each bus bar 4 is connected to each flat conductor 2 formed with a different width, each bus bar 4 formed with a width corresponding to each flat conductor 2 and each terminal welding device 5 is connected. The electrodes 6 and 7 may be disposed.

  In detail, the flat cable 1 includes a plurality of flat conductors 2 formed in the same width in parallel with a predetermined pitch interval, and the flat conductors 2 are arranged in parallel. A pair of resin films 3 and 3 having flexibility and insulating properties are covered on the upper and lower surfaces of the flat conductor group, and the resin films 3 and 3 in a portion where the flat conductors 2 are not sandwiched. Are integrally bonded.

  The terminal welding device 5 presses the bus bar 4 on the resin film 3 on the upper surface side so as to face the flat conductor 2 arranged at the connection place A of the flat cable 1, and then faces the flat conductor 2 to The terminal side electrode 6 is pressed against the bus bar 4 and the cable side electrode 7 is pressed against the resin film 3 on the lower surface side.

  Further, the terminal side electrode 6 and the cable side electrode 7 include a clamping position where the connecting portion A of the flat cable 1 where the flat conductor 2 and the bus bar 4 are opposed to each other by an elevating means (not shown) is vertically held, and the connecting portion A Is moved relative to the up and down direction to a separation position where insertion and extraction are allowed. In addition, when the cable side electrode 7 is fixed, the terminal side electrode 6 is opposed to the flat conductor 2 at the connection portion A of the flat cable 1, and the bus bar 4 placed on the resin film 3 on the upper surface side. You may move up and down in the pressing direction.

  The terminal-side electrodes 6 are arranged above the flat conductors 2 arranged at the connection points A of the flat cable 1 and arranged in a plurality at a pitch interval corresponding to the flat conductors 2. Further, the lower end side pressing surface of the terminal side electrode 6 faces the flat conductor 2 disposed at the connection location A and faces downward with respect to the bus bar 4 placed on the resin film 3 on the upper surface side. A contact point 6a that is pressed vertically is projected.

  The cable-side electrode 7 is disposed below and facing the flat conductor 2 disposed at the connection location A of the flat cable 1, and a plurality of the cable-side electrodes 7 are arranged at a pitch interval corresponding to the flat conductor 2. In addition, a contact 7a that protrudes vertically against the resin film 3 on the lower surface side is opposed to the pressing surface on the upper end side of the cable-side electrode 7 so as to face the flat conductor 2 arranged at the connection location A. Has been established.

  The contact 6a of the terminal-side electrode 6 and the contact 7a of the cable-side electrode 7 are formed to have a horizontal width corresponding to one flat conductor 2, and have a size and shape corresponding to the connection portion A between the flat conductor 2 and the bus bar 4. Is formed.

  Further, the contacts 6a and 7a of the electrodes 6 and 7 are heated to a temperature at which the resin film 3 is melted via the electric wires 8a on the upper end side of the terminal side electrode 6 and the lower end side of the cable side electrode 7, respectively. For this purpose, the first energization devices 8 and 8 are individually connected.

  When the first energization device 8 detects that the contact 6a of the terminal side electrode 6 is pressed against the bus bar 4 by a detection means (not shown), or the contact of the cable side electrode 7 to the resin film 3 on the lower surface side. When it is detected that 7a is directly pressed, a current supplied from a power source (not shown) is supplied to each contact 6a, 7a of each electrode 6, 7 based on the detection.

  Thereby, the contact 6a of the terminal side electrode 6 pressed against the bus bar 4 on the resin film 3 on the upper surface side and the contact 7a of the cable side electrode 7 pressed directly against the resin film 3 on the lower surface side are connected to the resin film 3. Heat to a temperature at which it dissolves.

  The terminal-side electrode 6 is melted by indirectly heating the resin film 3 on the upper surface side via the bus bar 4, while the cable-side electrode 7 is melted by directly heating the resin film 3 on the lower surface side. Therefore, the heat generation temperature of the terminal side electrode 6 may be set higher than the heat generation temperature of the cable side electrode 7.

  Further, the terminal-side electrode 6 and the cable-side electrode 7, apart from the first energization device 8, are connected to the contact points 6 a and 7 a of the electrodes 6 and 7 via the electric wires 9 a. The contact portion between the bus bar 4 and the bus bar 4 is connected to a second energization device 9 for resistance welding.

  When a trigger signal is output from an energization detection circuit 10 described later, the second energization device 9 opens an energization circuit between the electrodes 6 and 7 and performs resistance welding supplied from a power source (not shown). A necessary current is applied between the contacts 6a and 7a of the electrodes 6 and 7 for a predetermined time. As a result, the contact portion between the flat conductor 2 and the bus bar 4 is heated to a temperature at which it melts. The energization circuit between the electrodes 6 and 7 is closed until the trigger signal is output from the energization detection circuit 10.

  Further, whether or not the rectangular conductor 2 and the bus bar 4 are pressed to the terminal side electrode 6 and the cable side electrode 7 through the electric wires 10a. An energization detection circuit 10 is detected for detecting (see FIG. 1).

  The energization detection circuit 10 constantly energizes a weak current supplied from a power source (not shown) to the terminal-side electrode 6 and the cable-side electrode 7, and the flat conductor 2 and the bus bar 4 are in contact with each other in an energized state. Detects electrical changes such as resistance, current, voltage, etc. That is, when the resin in which the resin film 3 is dissolved is removed from between the flat conductor 2 and the bus bar 4, the flat conductor 2 and the bus bar 4 are directly pressed into a state where electricity can be applied.

  At this time, current is passed between the terminal-side electrode 6 and the cable-side electrode 7, so that the rectangular conductor 2 and the bus bar 4 can be energized by detecting an electrical change that occurs during the energization by the energization detection circuit 10. It can be detected that the state has been touched. The energization detection circuit 10 outputs a trigger signal to the second energization device 9 when detecting that the rectangular conductor 2 and the bus bar 4 are in contact with each other in an energizable state.

  On the other hand, when a trigger signal is output from the energization detection circuit 10, the second energization device 9 energizes a current necessary for resistance welding between the terminal side electrode 6 and the cable side electrode 7, The contact portion between the flat conductor 2 and the bus bar 4 sandwiched between the electrodes 6 and 7 is resistance-welded so as to be energized.

  If the rectangular conductor 2 and the bus bar 4 are not in contact with each other in an energizable state, the heating and melting of the resin film 3 by the electrodes 6 and 7 are continued until a trigger signal is output from the energization detection circuit 10. .

  The illustrated embodiment is configured as described above, and the terminal welding method for the flat cable 1 will be described below.

  First, as shown in FIG. 1, the terminal-side electrode 6 and the cable-side electrode 7 of the terminal welding device 5 are kept waiting in a separated position in advance, and are opposed to the flat conductor 2 disposed at the connection location A of the flat cable 1. Then, the bus bar 4 is pressed onto the resin film 3 on the upper surface side covering the flat conductor 2 so as to be orthogonal to the length direction of the flat conductor 2.

  Thereafter, the connecting portion A of the flat cable 1 where the flat conductor 2 and the bus bar 4 face each other is inserted between the terminal side electrode 6 and the cable side electrode 7 of the terminal welding device 5, and the connecting portion A of the flat cable 1 is inserted. The terminal side electrode 6 and the cable side electrode 7 are sandwiched from above and below to be pressurized.

  The contact 6a of the terminal side electrode 6 is pressed vertically from above on the bus bar 4 placed on the upper surface side resin film 3 covering the flat conductor 2 at the connection location A. Further, the contact 7a of the cable side electrode 7 is pressed vertically from below to the resin film 3 on the lower surface side covering the flat conductor 2 at the connection location A.

  Next, as shown in FIG. 2, the current supplied from the terminal-side first energization device 8 is energized to the terminal-side electrode 6 pressed against the bus bar 4 (indicated by an arrow in the figure) and pressed against the bus bar 4. The contact 6a of the terminal-side electrode 6 is heated to a temperature at which the resin film 3 is dissolved.

  The bus bar 4 to which the contact 6a of the terminal side electrode 6 is pressed is directly heated, and the resin film 3 of the portion to which the bus bar 4 is pressed is indirectly heated and melted. The dissolved resin is removed by being pushed out from between the flat conductor 2 and the bus bar 4 by the applied pressure.

  That is, the rectangular conductor 2 at the portion facing the bus bar 4 is exposed in a state in which contact with the bus bar 4 is allowed, so that the rectangular conductor 2 pushed upward by the contact 7 a of the cable side electrode 7 is applied to the bus bar 4. It is directly pressed against.

  At the same time, as shown in FIG. 3, the current supplied from the first energization device 8 on the cable side is energized (indicated by an arrow in the figure) to the cable side electrode 7 pressed against the resin film 3 on the lower surface side, and the resin The contact 7a of the cable side electrode 7 pressed against the film 3 is heated to a temperature at which the resin film 3 is dissolved.

  The resin film 3 in the portion where the contact 7a of the cable side electrode 7 is pressed is directly heated and melted. The dissolved resin is removed by being pushed out from between the contact 7a of the cable-side electrode 7 and the flat conductor 2 by the applied pressure. That is, since the portion of the rectangular conductor 2 facing the contact 7a of the cable side electrode 7 is exposed to allow contact with the contact 7a, the contact 7a of the cable side electrode 7 is exposed to the exposed portion of the flat conductor 2. It is directly pressed against.

  When the rectangular conductor 2 and the bus bar 4 are brought into contact with each other in an energizable state, the energization detection circuit 10 detects an electrical change that occurs between the terminal-side electrode 6 and the cable-side electrode 7, and the rectangular conductor 2 and the bus bar 4 Recognize that they are in an energized state. The energization detection circuit 10 outputs a trigger signal to the second energization device 9 when detecting that the rectangular conductor 2 and the bus bar 4 are in contact with each other in an energizable state.

  Next, as shown in FIG. 4, the second energization device 9 is necessary for resistance welding between the terminal side electrode 6 and the cable side electrode 7 immediately after the trigger signal is output from the energization detection circuit 10. A current is applied (indicated by an arrow in the figure), and the contact portion between the flat conductor 2 and the bus bar 4 is resistance-welded so as to be energized. As a result, as shown in FIG. 5, the bus bar 4 can be reliably and satisfactorily connected to the flat conductor 2 of the flat cable 1.

  Moreover, since the operation | work which removes the resin film 3 and the operation | work which connects the bus-bar 4 can be performed substantially simultaneously by one process, the effort which removes the resin film 3 of the part to which the bus-bar 4 is connected beforehand, and The work can be omitted, and the process and time required for the connection work can be reduced to improve the work efficiency.

  When the welding of the flat conductor 2 and the bus bar 4 is completed, the welding operation by the terminal welding device 5 is stopped, the terminal side electrode 6 and the cable side electrode 7 are moved relative to each other in the separating direction, and the connecting portion of the flat cable 1 If A is extracted from between the terminal side electrode 6 and the cable side electrode 7, the welding operation is completed. Further, the operator may be notified of the completion of the welding of the flat conductor 2 and the bus bar 4 by notifying means such as a buzzer, a lamp, a speaker, and a vibrator.

  In addition, when the flat conductors 2 of the flat cable 1 are narrow in width, if the flat conductors 2 are exposed after being exposed by a normal resistance welding method, short-circuiting is likely to occur if the distance between the conductors is small, and high accuracy is required. It is.

  However, the terminal connection method and the terminal connection device of the present invention can be connected in a state where the flat conductors 2... Are laminated with a pair of resin films 3, 3, that is, in a state where a distance between the conductors is ensured.

  Thus, even if the pitch interval between the flat conductors 2 is narrow, the flat conductor 2 and the bus bar 4 can be easily and easily connected by the terminal connecting method and the terminal connecting apparatus of the present invention. It is possible to prevent the pitch interval between them from being displaced.

  FIG. 6 shows another example of the terminal welding method of the flat cable 1 in which a plurality of substantially trapezoidal protrusions 7b as viewed from the side are provided on the front end surface of the contact 7a of the cable side electrode 7. A plurality of the protrusions 7b are arranged along the pressing surface of the cable side electrode 7. Further, in the valleys between the protrusions 7b, concave and convex portions 7c, which are upside down triangles that allow inflow of the molten resin of the resin film 3 interposed between the cable side electrode 7 and the bus bar 4, are formed. . Further, the protrusions 7b... May be arranged in a desired arrangement state such as a grid shape, a staggered shape, or a lattice shape, or may be arranged at equal intervals.

  That is, the melted resin of the resin film 3 in the portion where the contact 7a of the cable side electrode 7 is pressed is pushed out from between the opposing surfaces of the projections 7b... Flows into the recesses 7c. Moreover, the resin melt | dissolved in the resin film 3 of the part by which each protrusion 7b ... of the cable side electrode 7 was pressed from between the opposing surfaces of each protrusion 7b ... of the cable side electrode 7 and the flat conductor 2 is escaped, and the cable side Since each protrusion 7b ... of the electrode 7 is directly pressed against the exposed portion of the flat conductor 2, the operation and effect substantially the same as those of the above embodiment can be achieved. Further, the protrusion 7b may be formed in a desired cross-sectional shape such as a semicircular shape or a hemispherical shape.

  A plurality of substantially trapezoidal protrusions (not shown) may be provided on the connection surface of the bus bar 4 facing the flat conductor 2 as viewed from the side as described above. In the same manner as described above, the melted resin of the resin film 3 at the portion where the protrusions of the bus bar 4 are pressed is pushed out from between the opposing surfaces of the protrusions of the bus bar 4 and the flat conductor 2, and the protrusions of the bus bar 4 are flat. Since it is directly pressed against the conductor 2, it is possible to achieve substantially the same operations and effects as in the above embodiment.

In the correspondence between the configuration of the present invention and the above embodiment,
The conductor of the present invention corresponds to the flat conductor 2 of the embodiment,
Similarly,
The connection terminal corresponds to the bus bar 4,
The first energization means corresponds to the first energization device 8,
The second energization means corresponds to the second energization device 9,
The energization detection means corresponds to the energization detection circuit 10,
The present invention is not limited to the configuration of the above-described embodiment, but can be applied based on the technical idea shown in the claims, and many embodiments can be obtained.

  The flat cable 1 may be the flat cable 1 in which the flat conductor 2 is covered with the nonconductive resin film 3 that is an insulating member, and is not particularly limited to the one of the present embodiment. Specifically, a PET resin is preferable as the material of the film 3.

  Further, the flat conductor 2 may be a conductor having a round cross section as well as a strip-shaped conductor excellent in heat dissipation, and the flat conductor 2 may be any material as long as it has conductivity. Preferably, it is made of metal, more preferably copper or copper alloy having excellent conductivity.

  The bus bar 4 is formed by bending a metal plate. The material may be any material as long as it has conductivity, but is preferably made of metal, more preferably copper or copper alloy having excellent conductivity. The plate thickness is about 0.1 mm to 5 mm.

The side view which shows the terminal welding method of a flat cable. The side view which shows the melted state of the resin film by the terminal side electrode. The side view which shows the melted state of the resin film by a cable side electrode. The side view which shows the melted state of a flat conductor and a bus bar. The side view which shows the welding state of a flat conductor and a bus-bar. The side view which shows the arrangement | sequence of the processus | protrusion formed in the cable side electrode.

Explanation of symbols

A ... Connection location 1 ... Flat cable 2 ... Flat rectangular conductor 3 ... Resin film 4 ... Bus bar 5 ... Terminal welding device 6 ... Terminal side electrode 7 ... Cable side electrode 6a, 7a ... Contact 7b ... Projection 7c ... Recess 8 ... First energization Device 9 ... second energization device 10 ... energization detection circuit

Claims (4)

In a terminal welding method of a flat cable for connecting a connection terminal to a conductor coated with a resin film having flexibility and insulation so as to be energized,
Opposing the conductor arranged at the connection location of the flat cable, pressing the connection terminal on one surface of the resin film covering the conductor,
Press the terminal side electrode against the connection terminal facing the conductor of the connection location,
After pressing the cable side electrode to the other surface of the resin film facing the conductor of the connection location,
The terminal electrode is heated when energized to heat the connection terminal, the resin film of the portion where the connection terminal is pressed is dissolved, and the connection terminal is brought into contact with a conductor in an energizable state,
After the cable side electrode generates heat during energization and melts the resin film of the portion where the cable side electrode is pressed, the cable side electrode is brought into contact with the conductor in an energizable state,
Applying a current necessary for resistance welding the conductor and the connection terminal to the terminal-side electrode and the cable-side electrode connected by the conductor and the connection terminal, the contact between the conductor and the connection terminal A terminal welding method for a flat cable, wherein the portion is resistance-welded so as to be energized. A weak current is applied to the terminal side electrode and the cable side electrode, and an electrical change between the electrodes that occurs when the conductor and the connection terminal are brought into contact with each other in an energizable state is detected by an energization detecting means. Detect
When a detection signal that detects an electrical change is output from the energization detection means, a current required for resistance welding is applied between the terminal-side electrode and the cable-side electrode connected by the conductor and the connection terminal. 2. The flat cable terminal welding method according to claim 1, wherein energization is performed. In a flat cable terminal welding apparatus for connecting a connection terminal to a conductor coated with a resin film having flexibility and insulation so as to allow energization,
Opposing the conductor disposed at the connection location of the flat cable, the connection terminal is disposed on one surface of the resin film covering the conductor,
Providing a terminal-side electrode pressed against the connection terminal facing the conductor of the connection location;
Provide a cable side electrode pressed against the other surface of the resin film facing the conductor of the connection location,
When the terminal side electrode is pressed against the connection terminal and the cable side electrode is pressed against the resin film, the connection terminal and the cable side electrode are pressed against the terminal side electrode and the cable side electrode. Providing a first energizing means for energizing a current necessary to generate heat to a temperature at which a portion of the resin film melts;
When the conductor and the connection terminal are in contact with each other in an energizable state, the contact portion between the conductor and the connection terminal is connected to the terminal side electrode and the cable side electrode connected by the conductor and the connection terminal. A flat cable terminal welding apparatus comprising a second energization means for energizing a current necessary for resistance welding. An energization detecting means for detecting an electrical change between the electrodes, which occurs when a weak current is applied to the terminal side electrode and the cable side electrode, and the conductor and the connection terminal are brought into contact with each other in an energizable state. Provided,
4. The flat cable terminal according to claim 3, wherein the energization circuit of the second energization means connected to the electrodes is opened and closed based on a detection signal output from the energization detection means. Welding equipment.

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