JP4351032B2 - Inspection signal supply apparatus and inspection signal application method - Google Patents

Description

  The present invention relates to an inspection signal applying method for applying an inspection signal to a cut piezoelectric wire constituting a wire harness, and an inspection signal supply device for supplying an inspection signal to a cut piezoelectric wire.

  In the manufacture of wire harnesses, the cut piezoelectric wires to which the terminals to be inserted into the connector are fixed are separated by type and held on the wire mount, and the cut piezoelectric wires to which the terminals to be attached to the connectors are attached The terminal was taken out from the wire stand and mounted in the connector housing.

  For example, the device described in Patent Document 1 holds a necessary number of locking portions for locking a pair of connectors assembled on both ends of an electric wire on a workbench, and a cut piezoelectric wire to which terminals to be mounted in the connector are fixed. In this way, take out the wire from the blinking wire mount among the plurality of wire mounts, and insert one end of the wire into the cavity of the connector housing being guided The occurrence of incorrect wiring was prevented.

  The device described in Patent Literature 1 touches the touch plate after mounting the connector to instruct the end of the mounting, and performs the next wire insertion guidance.

  Moreover, the apparatus described in Patent Document 2 has confirmed whether or not the correct cut piezoelectric wire has been taken out by whether or not the cut piezoelectric wire has passed through the gate provided at the end of the wire mount.

JP2001-43950 JP-A-5-297046

  However, the devices described in Patent Document 1 and Patent Document 2 only provide guidance for the insertion position of the wire, and cannot detect the state of the cut piezoelectric wire in the actual manufacturing process, thus preventing erroneous wiring. It was incomplete to do.

  Moreover, the apparatus described in Patent Document 2 can only determine whether or not a correct cut piezoelectric wire has been accurately taken out from the electric wire rack.

  That is, conventionally, the inspection of whether or not the connector is correctly attached has been performed only by checking whether or not the correct cut piezoelectric wire has been taken out from the wire stand, for example. As described above, conventionally, it has not been possible to inspect whether or not the terminal of the cut piezoelectric wire is securely mounted at a desired position of the connector during the manufacturing process.

  This is because the method for supplying the inspection signal to the cut piezoelectric wire is limited. That is, conventionally, in order to supply the inspection signal to the cut piezoelectric wire, the terminal portion fixed to the end portion and the inspection signal supply source must be brought into direct contact with each other via a probe or the like to be electrically connected. Therefore, the position of the cut piezoelectric wire during work was indefinite, and the inspection signal was directly brought into contact with the terminal mounted on the connector housing via a probe or the like after the work was completed.

  As a result, the specific continuity test is conducted after all of the required cut piezoelectric wire terminals have been attached to the connectors at both ends of the harness, and the electrical connection to the connectors with the cut piezoelectric wire terminals attached to both ends of the wire harness is conducted. A jig on the inspection device side is mounted, for example, an inspection signal is supplied for each connector contact (or wire number), and the continuity is inspected based on whether the inspection signal is detected on the other connector side. It was common to inspect for incorrect wiring.

  If the cut piezoelectric wire terminal can be inserted into the connector while supplying the inspection signal to the cut piezoelectric wire to be inspected and applying the inspection signal to the cut piezoelectric wire to be inspected during the manufacturing of the wire harness, the inspection of the terminal mounting state on the connector Is also possible. Therefore, if the inspection signal supply source and the cut piezoelectric wire are not in contact with each other and the inspection signal can be applied to the wire to be inspected, it is possible to inspect the incorrect wiring, and the cut piezoelectric wire has terminals attached to both ends. In addition, it has been desired to realize an inspection signal supply apparatus and an inspection signal application method that can reliably supply an inspection signal.

  The present invention has been made in view of the above-described problems, and allows an inspection signal to be applied to an inspection target cutting piezoelectric wire while the inspection signal supply source and the cutting piezoelectric wire are not in contact with each other, and the cutting piezoelectric wire is attached to the connector. It is an object of the present invention to provide an inspection signal supply device and an inspection signal application method for a cut piezoelectric wire capable of inspecting a wiring at the time.

  For example, the following configuration is provided as a means for achieving the object.

  That is, an inspection signal applying method for applying an inspection signal to a cut piezoelectric wire constituting a wire harness and having a terminal fixed to at least one end thereof. Position the power feeding part formed of a conductive material so as to be in contact with or close to the wire covering material, maintain the positioning state, supply an inspection signal to the power feeding part, and supply the cutting piezoelectric wire to the cutting piezoelectric wire. It is an inspection signal application method in which an inspection signal is applied in a non-contact manner to terminals and internal conductors.

  An inspection signal supply device that can apply an AC inspection signal to a cut piezoelectric wire that constitutes a wire harness and has a terminal fixed to at least one end thereof, at least a part of which is a conductive material that can supply the inspection signal. And a positioning means for positioning at least a part of the conductive material portion of the power supply means in contact with or in the vicinity of the covering material of the cut piezoelectric wire, and the cut piezoelectric wire is connected to the terminal of the cut piezoelectric wire. In addition, the end terminal can be attached to the connector housing in a state where an inspection signal is applied to the inner conductor in a non-contact manner.

  For example, the positioning means includes a suspension holding section capable of hanging and holding a cut piezoelectric wire, and at least the cutting piezoelectric wire of the suspension holding section is hung and a conductive material of the power feeding means is disposed in the vicinity of the holding surface. An inspection signal is applied to the cut piezoelectric wire in a state where the piezoelectric wire is suspended and held, and the terminal can be mounted in the connector housing while the inspection signal is applied.

  In addition, for example, the hanging holding portion has a cutting piezoelectric wire holding portion formed in a substantially semi-cylindrical cross section capable of hanging and holding a plurality of cutting piezoelectric wires, and in the vicinity of a tip portion continuous with the cutting piezoelectric wire holding portion. A power feeding means having the conductive material disposed thereon is disposed at an upper portion.

  Further, for example, the power supply means is formed of a conductive material formed in a finger sack shape, and the positioning means is formed in a glove shape that can be worn by an operator during work, and is insulated from the tip of a finger portion that pinches a cut piezoelectric wire. A shield member capable of holding the power supply means through a layer and formed of a conductive material and maintained at a ground level between at least the finger tip insulating layer and the worker contact surface; Features.

  According to the present invention, it is possible to apply an inspection signal without contact with the cut piezoelectric wire constituting the wire harness even from an intermediate portion of the cut piezoelectric wire, for example, by attaching terminals to both ends of the cut piezoelectric wire. Even when the terminals at both ends are in the connector housing, an inspection signal can be applied to the cut piezoelectric wire without contact with the terminals, and the mounting positions of the connectors at both ends can be inspected.

  Even in this case, it is not necessary to supply the inspection signal by directly contacting the terminal, and it is possible to manufacture a highly reliable wire harness without damaging the contact at the tip of the terminal.

Embodiments of the present invention will now be described in detail with reference to the drawings.
[First Embodiment]

  First, as an example of an inspection signal supply device for a cut piezoelectric wire according to the present invention, a first embodiment applied to a cut piezoelectric wire gantry capable of hanging and holding a cut piezoelectric wire will be described. FIG. 1 shows a configuration example of a cut piezoelectric wire gantry according to an embodiment of the present invention. FIG. 1 is a diagram showing a configuration example of a cut piezoelectric wire gantry according to an embodiment of the present invention, and a configuration of a mounting state inspection device to a connector of a cut piezoelectric wire terminal to which an inspection signal is applied is omitted. It represents.

  In FIG. 1, reference numeral 500 denotes a cut piezoelectric wire frame according to the present embodiment, 600 denotes a work table for assembling a wire harness, and 710 denotes an A connector constituting one end of the wire harness disposed on the work table 600. 720 is a B connector constituting the other end of the wire harness disposed on the work table 600.

In the cut piezoelectric wire frame 500, 510 is a base portion, 520 is a rising arm portion erected from the base portion 510, and the base portion 510 and the arm portion 520 constitute a locking portion for locking the cut piezoelectric wire holding portion 550. ing.
Reference numeral 550 denotes a cut piezoelectric wire holding portion (hanging holding portion) capable of hanging and holding the cut piezoelectric wire substantially in contact with the cut piezoelectric wire. This is a work electric wire holding part (contact part) in which a power feeding part 570 constituting a signal conducting part to which an inspection signal is fed is provided in the vicinity of the part.

  Reference numeral 570 denotes a power feeding unit that applies an inspection signal to the cut piezoelectric wire formed on at least the upper surface of the cut piezoelectric wire holding unit 550, and reference numerals 551, 552, and 561 denote guide plates formed at both ends of the cut piezoelectric wire holding unit 550. The cut piezoelectric wire hung on the piezoelectric wire holding portion 550 is prevented from being detached.

  In the present embodiment, when actually manufacturing a wire harness, the cut piezoelectric wire mount 500 is installed in the vicinity of the work table 600. The work table 600 is configured so that two or more connectors can be set at different locations, and a mounting state confirmation device, which will be described in detail later, is arranged in the vicinity of each connector. It is configured so that the mounting state of the cut piezoelectric wire terminal to the connector can be confirmed.

  FIG. 1 shows only the cut piezoelectric wire platform 500. Actually, in addition to the cut piezoelectric wire platform 500, the cut piezoelectric wire platform holding a plurality of cut piezoelectric wires constituting the wire harness. The number of cut piezoelectric wire types is arranged in the vicinity of the work table 600, and in accordance with the type of cut piezoelectric wire to be attached to the connector, the cut piezoelectric wire frame that holds the next cut piezoelectric wire to be operated is sequentially selected, and the selected cut Cutting piezoelectric wire is taken out from the piezoelectric wire frame.

  In order to manufacture a wire harness using the cut piezoelectric wire mount 500 shown in FIG. 1, first, a number of cut piezoelectric wires are suspended over the cut piezoelectric wire holding portion 550.

  Then, the cut piezoelectric wire (working cut piezoelectric wire) 300 to be attached to the connector is moved to the working wire holding portion 560 at the tip, and is suspended at the site where the power feeding portion 570 is disposed. And

  When power is supplied to the inspection signal in this state, the inspection signal is applied to the working cut piezoelectric wire suspended over the power supply unit 570, and the inspection signal can be supplied directly and electrically without contact with the cut piezoelectric wire. Therefore, the inspection signal can be detected at both ends of the cut piezoelectric wire. For example, by using an inspection device to be described later, when the wire harness is manufactured, the wire harness is manufactured without a special inspection process. Defects can be detected in advance.

  The connectors 710 and 720 are housed in a connector housing section, which will be described in detail later. In addition, although two connectors are installed in the example of FIG. 1, one or three or more connectors may be used according to the specification of the harness.

  The cut piezoelectric wire frame 500 includes a suspension holding portion 550 for hanging a cut piezoelectric wire, and has a power feeding portion 570 in a part of the suspension holding portion 550 or in the vicinity of the tip of the suspension holding portion 550 as shown in FIG. Also good.

  By adopting a configuration in which the feeding piezoelectric element 570 is provided in the portion where the cut piezoelectric wire is hung, even if the cut piezoelectric wire 300 has terminals provided at both ends of the cut piezoelectric wire, there is no possibility that it will be caught in the middle and cannot be taken out. .

  Furthermore, since the power feeding unit 570 is arranged in the middle portion of the cut piezoelectric wire, even if terminals are attached to both ends of the cut piezoelectric wire, the inspection signal can be supplied in a non-contact manner to the inner conductor of the cut piezoelectric wire. Even when the respective terminals at both ends of the piezoelectric wire are respectively attached to predetermined connectors, it is possible to inspect whether or not the terminals at both ends are attached to the respective connectors.

  With reference to FIG. 2, a configuration example of a mounting state confirmation apparatus for confirming the mounting state of the terminal mounted on the end of the cut piezoelectric wire to the connector housing in the wire harness manufacturing site using the cut piezoelectric wire mount 500 described above. I will explain.

  FIG. 2 shows a terminal mounting state for detecting a mounting state of a terminal mounted on the end of the cut piezoelectric wire constituting the harness to the connector using the cut piezoelectric wire mount according to the embodiment of the present invention. It is a schematic diagram for demonstrating the basic principle of a confirmation apparatus.

  The device for confirming whether or not the cut piezoelectric wire terminal is mounted on the connector housing using the cut piezoelectric wire mount according to the present embodiment is configured to check whether the cut piezoelectric wire terminal is mounted at the correct position on the connector housing. It is a device that can be determined by contact, and with this terminal mounting state confirmation device, it is possible to determine whether or not the cut piezoelectric wire terminal is correctly mounted when the cut piezoelectric wire terminal is mounted to the connector in the manufacturing process of the wire harness. It is not necessary to check the mounting status of the connector.

  In FIG. 2, reference numeral 10 denotes a connector housing (hereinafter referred to as “connector”) that constitutes an end portion of the wire harness to be inspected. A terminal fixed to one end of 300 is inserted to a predetermined depth.

  The working cut piezoelectric wire 300 to be attached to the connector is cut in advance to a predetermined length, and a terminal having a predetermined specification to be attached in the connector 10 is fixed to the end by, for example, crimping.

  20a and 20b are opposing one side surfaces of the connector 10, for example, if the connector 10 is rectangular in a top view, Y-axis sensor plates disposed near the outer walls on both sides of the long side, and 30a and 30b are the other opposing side surfaces of the connector 10. For example, if the connector 10 is rectangular when viewed from above, it is an X-axis sensor plate disposed in the vicinity of the outer wall on both side surfaces of the short side.

  Reference numerals 40a and 40b denote Z plates in which two conductive plates disposed close to the engagement surface (bottom surface in FIG. 1) of the connector 10 with the corresponding connector are positioned so as to be substantially parallel with a predetermined distance apart. For example, in the example of FIG. 1, sensor plates are formed on both surfaces of the insulating sheet so as to be separated from each other by a certain distance. However, it is not limited to the above example.

  Reference numeral 500 denotes a cut piezoelectric wire pedestal according to this embodiment shown in FIG. 1, which suspends and holds a plurality of cut piezoelectric wires to which terminals mounted in the connector 10 are fixed.

  In the example of FIG. 2, only one cutting piezoelectric wire frame is illustrated for simplicity of explanation. However, at the actual work site, at least the number of cutting piezoelectric wires attached to the connector 10 is held for each cutting piezoelectric wire. A suitable cutting piezoelectric wire frame is provided.

  At least a part (for example, in the vicinity of the tip) of the working electric wire holding unit 560 of the cut piezoelectric wire platform 500 is provided with a power feeding unit 570 for transmitting an AC signal and applying the AC signal to the cut piezoelectric wire in the stored state. It is suspended and held in a state where it can be electrostatically coupled to the working cut piezoelectric wire 300, for example.

  As a result, at all states in the process of attaching the terminal at the end of the cut piezoelectric wire to the predetermined position of the connector 10, at least a part of the cut piezoelectric wire is at the power feed portion position and the power feed portion is driven. In some cases, an AC signal is applied to the cut piezoelectric wire attached to the connector.

  Sensor plates (20a, 20b, 30a, 30b) are disposed in the vicinity of the side surfaces of the connector 10, and sensor plates (40a, 40b) are disposed in the vicinity of the bottom surface (joint surface with the mating connector). When a cut piezoelectric wire terminal to which an AC signal is applied is attached to the connector 10 by the cut piezoelectric wire mount 500 of the embodiment, the signal from the terminal is sent to each sensor plate (20a, 20b, 30a, 30b). , 40a, 40b), and a detection signal is obtained. Specifically, different detection signals are detected according to the distance from the terminal.

100 is an inspection control unit that controls the inspection apparatus, and 170 is a power supply control unit that controls power supply of an AC inspection signal to the power supply unit 570 of the piezo-electric wire frame 500. Control is performed so that power is supplied only to the cut piezoelectric wire frame that holds the cut piezoelectric wire to be attached. In addition, the inspection control unit 100 performs control so as to short-circuit the power feeding units of other cutting piezoelectric wire gantry not performing power feeding to the ground or a state close to the ground level.
In the inspection control unit 100 of the present embodiment, the sensor is based on the value of the detection signal detected by a pair of opposing sensor plates of the sensor plates (20a, 20b, 30a, 30b, 40a, 40b). The relative distance between the sensor plate and the terminal based on the distance between the plates is detected. Thereby, the influence of the level difference (variation in applied signal intensity) of the AC signal applied to the cut piezoelectric wire from the power feeding unit of the cut piezoelectric wire frame 500 is reduced.

  The Y-axis sensor plates 20a and 20b detect the position in the Y-axis direction (short side direction) in the connector 10, and the X-axis sensor plates 30a and 30b detect the position in the X-axis direction (long side direction) in the connector 10. By doing so, the insertion position in the connector 10 of the terminal to which the AC inspection signal is applied can be specified, and it can be detected whether or not the terminal is inserted in the correct position.

  Furthermore, by disposing the two Z-axis sensor plates 40a and 40b near the bottom of the connector 10, the distance from which the terminal is inserted from each Z-axis sensor based on the detection results of the Z-axis sensor plates 40a and 40b, In other words, it is possible to detect how far the connector 10 has been inserted, and it is possible to determine whether the connector 10 has been inserted to a predetermined position or whether the insertion has been insufficient.

  Furthermore, since the detection voltage of each sensor plate is determined by the area facing the cut piezoelectric wire terminal, for example, even if a hole is provided in part or a notch is formed in part, the influence on the detection result is very small. There are few and can almost be ignored.

  A detailed configuration of the inspection signal processing unit of the inspection control unit 100 shown in FIG. 2 will be described below with reference to FIG. FIG. 3 is a diagram for explaining a detailed configuration of the signal processing unit of the inspection control unit of the present embodiment.

  In FIG. 3, reference numerals 111 to 116 denote amplifiers A to F that amplify detection signals from the sensor plates (20a, 20b, 30a, 30b, 40a, and 40b), and 121 to 126 denote sensor plates (20a, 20b, 30a, 30b, 40a and 40b) are peak detection circuits A to F for detecting the peak value of the detection signals from 40a and 40b).

  Reference numeral 131 denotes an X-axis addition circuit which inputs peak detection signals Vx1 and VX2 from the X-axis sensor plates 30a and 30b, adds the detected values (Vx1 + Vx2), and 132 denotes a peak detection signal from the Y-axis sensor plates 20a and 20b. A Y-axis addition circuit for inputting Vy1 and Vy2 and adding the detected values to (Vy1 + Vy2), and 133 inputs peak detection signals Vz1 and Vz2 from the Z-axis sensor plates 40a and 40b, and calculates the difference (Vz1−Vz2). It is a Z-axis subtraction circuit that outputs.

  141 receives the output of the X-axis addition circuit 131 and the peak detection signal value from one X-axis sensor plate (for example, 30b), and uses the X-axis addition signal (Vx1 + Vx2) from the X-axis addition circuit 131 as a denominator. This is an X-axis dividing circuit for obtaining {Vx2 / (Vx1 + Vx2)} using the peak detection signal (Vx2) from the X-axis sensor plate (for example, 30b) as a numerator.

  The output of the X-axis dividing circuit 141 represents the relative change in the detection signals of the X-axis sensor plates 30a and 30b, and the influence of the change in the intensity of the AC signal applied (powered) to the cut piezoelectric wire from the power feeding unit. Can be offset. As a result, since the output of the X-axis dividing circuit 141 has a signal level that directly corresponds to the position in the X-axis direction in the connector 10, the cut piezoelectric wire that is mounted in the connector 10 from the output of the X-axis dividing circuit 141. The position of the terminal in the X-axis direction can be detected without contact.

  142 receives an output from the Y-axis addition circuit 132 and a peak detection signal value from one Y-axis sensor plate (for example, 20b), and uses a Y-axis addition signal (Vy1 + Vy2) from the Y-axis addition circuit 132 as a denominator. This is a Y-axis division circuit for obtaining {Vy2 / (Vy1 + Vy2)} using the peak detection signal (Vy2) from one Y-axis sensor plate (for example, 20b) as a numerator.

  The output of the Y-axis dividing circuit 142 represents the relative change in the detection signals of the Y-axis sensor plates 20a and 20b, and the influence of the change in the intensity of the AC signal applied (powered) to the cut piezoelectric wire from the power feeding unit. Can be offset. As a result, the output of the Y-axis dividing circuit 142 has a signal level that directly corresponds to the position in the Y-axis direction in the connector 10, so that the cut piezoelectric wire mounted in the connector 10 from the output of the Y-axis dividing circuit 142. The position of the terminal in the Y-axis direction can be detected without contact.

  From the output of the X-axis division circuit 141 and the output of the Y-axis division circuit 142, the mounting position (two-dimensional position) of the cut piezoelectric wire terminal in the connector 10 in the XY direction can be detected without contact.

  Further, reference numeral 143 denotes {Vz2 / (Vz1-Vz2)} using the Z-axis difference signal (Vz1-Vz2) from the Z-axis subtraction circuit 133 as a denominator and the detection signal (Vz2) from the Z-axis sensor plate 40b as a numerator. This is a Z-axis division circuit to be obtained.

  The output of the Z-axis dividing circuit 143 represents the relative change in the detection signals of the Z-axis sensor plates 40a and 40b, and the influence of the change in the intensity of the signal applied (powered) to the cut piezoelectric wire from the power feeding unit. Can be offset. As a result, the output of the Z-axis dividing circuit 143 has a signal level proportional to the distance from each Z-axis sensor plate 40a, 40b of the cut piezoelectric wire terminal. It is possible to detect how many line terminals have been inserted into the connector 10 and to detect whether or not the wire terminals have been inserted up to the correct mounting position.

The circuit configuration described above is such that in the X-axis sensor plate and the Y-axis sensor plate, [1 / {(1 / Vn2) + (1 / Vn1)}] / Vn1 where X or Y is n.
= {(Vn1 × Vn2) / (Vn1 + Vn2)} / Vn1
= (Vn2) / (Vn1 + Vn2)
In the Z-axis sensor plate, [1 / {(1 / Vz2)-(1 / Vz1)}] / Vz1
= {(Vz1 * Vz2) / (Vz1-Vz2)} / Vz1
= (Vz2) / (Vz1-Vz2)
This is because.

  In the present embodiment, the Z-axis sensor 40b is located on the back side of the Z-axis sensor 40a as viewed from the connector side, but the connector 10 is formed of a non-conductive material, and the Z-axis sensor plate 40a, Since both 40b are maintained in a high impedance state, even if the detection value of the AC signal from the terminal in the Z-axis sensor 40b is somewhat influenced by the Z-axis sensor 40a, the influence of the AC signal from the terminal is influenced by the Z-axis sensor. It is not blocked by the plate 40a, and a certain level value can be reliably detected. As a result, the relative relationship between the detection values of the Z-axis sensor 40a and the Z-axis sensor 40b is determined only by the terminal insertion position, and the terminal insertion position into the connector 10 can be detected almost accurately.

  That is, the presence of the Z-axis sensor 40a does not prevent an AC signal from being detected from the Z-axis sensor 40b, and even if the detection level of the Z-axis sensor 40b slightly decreases due to the presence of the Z-axis sensor 40a, it is surely constant. The level value can be detected.

  This is the same even when the terminal to be inserted into the connector 10 is not the first terminal. When some terminals are already mounted in the connector 10, the positions of the mounted terminals and Even if the detection level on the sensor plate varies depending on the number, whether or not the terminal insertion position in each case is correct can be accurately identified.

  An example of the inspection result in the inspection control unit is shown in FIG. FIG. 4 is a diagram for explaining an example of a detection result in the inspection control unit of the present embodiment.

  In the example of FIG. 4, the terminal holding portion (cavity) of the connector housing has a lattice-like cavity as shown in FIG. 2, and the terminals are sequentially moved from the cavity position (1, 2) and inserted. This is an example (unit is “V”) processed by the hardware arithmetic circuit.

  Since electrostatic coupling is used to supply the AC inspection signal to the cut piezoelectric wire, the level of the inspection signal cannot be made constant and is expected to vary greatly. Therefore, when the inspection signal of 20 Vp-p is given to the cut piezoelectric wire and when the inspection signal of 10 Vp-p is given, the detection results when the terminal is inserted into each cavity of the connector housing are compared. ing.

  In the example of FIG. 4, the inspection signal detection result when the upper stage gives a test signal of 20 Vp-p and the output example of the division circuit after the operation, the lower stage shows the inspection signal detection result when the test signal of 10 Vp-p is given This is an example of division circuit output after calculation, and even when the inspection signal level given to the cut piezoelectric wire fluctuates greatly as described above, the fluctuation of the division circuit output voltage X1 is less than 4%, A unique detection result is obtained.

  The detection results are shown in Table 1. In Table 1, the vertical axis represents the X voltage calculation value, the horizontal axis represents the terminal insertion row position of the cavity, and the terminal insertion position in each of the first to sixth rows is shown in the lower part of FIG. The left end is the first column and the right end is the sixth column.

表１における割算器の演算値Ｘとキャビティ位置の関係を表２に示す。

Table 2 shows the relationship between the calculated value X of the divider in Table 1 and the cavity position.

図４下段に示すように、演算結果とキャビティ位置の関係は上記グラフの通りである。

As shown in the lower part of FIG. 4, the relationship between the calculation result and the cavity position is as shown in the graph above.

  Since the connector housing has cavities at regular intervals at a pitch of about 2.5 mm, there is a proportional relationship between the calculated value of X and the cavity position, and it also affects the upper and lower stages of the connector housing shown in Table 2 and the supply voltage. Since the values are almost the same, the cavity into which the terminal is inserted can be specified by the calculated value of X.

  This is exactly the same for the Y-axis sensor plates 20a and 20b and the Z-axis sensor plates 40a and 40b, so that a stable detection result can be obtained even if the inspection signal supplied to the cut piezoelectric wire varies. It is a state confirmation device.

  From the above, the insertion position to each cavity in the column direction is specified by the X axis sensor plates 30a and 30b, the insertion position to the cavity in the row direction is specified by the Y axis sensor plates 20a and 20b, and the Z axis sensor plate 40a, The insertion depth can be specified by 40b.

  In the inspection apparatus used in the manufacturing process, the connector is housed in the connector holding portion shown in FIG. 5 at the manufacturing site where the cut piezoelectric wire is mounted. FIG. 5 is a diagram showing an example of the connector holding portion of the present embodiment. It is necessary to position and house the connector 10 in the connector housing portion 61 of the connector holding portion 60 and position each sensor plate in the vicinity of the side surface or the bottom surface of the connector. For this reason, in this embodiment, the connector holding portion is used to hold the connector and position the sensor plate.

  In the connector holding portion 60 of the present embodiment, each sensor plate is arranged on the side wall portion of the connector holding portion 60, and if the size of the connector is substantially the same as the size of the connector storage portion 61, it is stored as it is. Therefore, a good inspection can be performed.

  Further, the X-axis sensor plates 30a, 30b and the Y-axis sensor plates 20a, 20b are fixed to the side surfaces of the connector holding portion 60, respectively, so that they are at a substantially constant distance from the connector side surfaces stored and held in the connector storage portion 60. It is configured.

  Accordingly, when the cut piezoelectric wire is mounted, the cut piezoelectric wire can be inspected by simply storing and holding the connector 10 in the connector storage portion 61 of the connector holding portion 60.

  The cut piezoelectric wire terminal mounting control to the connector 10 using the cut piezoelectric wire mount of the apparatus of the present embodiment having the above configuration will be described below with reference to the flowchart of FIG. FIG. 6 is a flowchart for explaining cut piezoelectric wire terminal mounting control to the connector 10 using the cut piezoelectric wire mount of the apparatus of this embodiment.

  First, in step S1, at least a necessary number of cut piezoelectric wires to be attached to the connector 10 constituting the wire harness are suspended to the cut piezoelectric wire mount 500 or stored in another cut piezoelectric wire mount. Terminals attached to the connector 10 are fixed to both ends of the cut piezoelectric wire by crimping or the like.

Subsequently, in step S2, the connector 10 constituting the end portion of the wire harness is housed in a predetermined connector housing portion of the connector holding portion.
This may be manually positioned or automatically positioned by a work robot. If the connector 10 is stored correctly, this may be detected and the process may proceed to step S3 and subsequent steps.

  When the connector is stored, as shown in step S3, the power supply control unit 170 is instructed to supply an inspection signal, which is an alternating current signal of a predetermined frequency, to the power supply unit 570 of the cutting piezoelectric wire frame 500, and the work position is suspended. An inspection signal is applied to the cut piezoelectric wire being passed. The operator pulls out at least one of the cut piezoelectric wires suspended from the work electric wire holding unit 560.

  As a result, an AC signal is transmitted to the cut piezoelectric wire to be next attached to the connector, and the cut piezoelectric wire 300 at the position of the working wire holding portion 560 is in a state where the AC signal from the power feeding portion is applied.

  In this embodiment, the inspection signal can be an AC signal having a voltage level of several tens of volts or less, for example, a signal of about 1 KHz. In addition, the inspection signal applied to the cut piezoelectric wire 300 does not require a large amount of power, and there is no possibility that the operator may be electrocuted by touching not only the cut piezoelectric wire but also the terminal of the cut piezoelectric wire end, Safety can be secured.

  In addition, an indicator is added to the cut piezoelectric wire mount, and then the cut piezoelectric wire mount holding the cut piezoelectric wire terminal to be attached to the connector is displayed so as to be visually observable (the cut piezoelectric device to which an AC signal is applied to the power feeding unit). It is desirable to light up the indicator of the wire mount).

  By controlling the light emission in this manner, the operator can definitely confirm the cut piezoelectric wire frame that holds the cut piezoelectric wire to be next attached to the connector 10 by checking the indicator of the cut piezoelectric wire frame.

  Next, in step S4, the inspection control unit 100 is driven, and detection of the terminal insertion position (mounted state) is started.

  Then, in step S5, the operator performs the work of mounting the cut piezoelectric wire terminal. At the same time, as shown in step S6, the inspection control unit 100 detects the terminal insertion position (mounted state). In the inspection control unit 100, the peak detection circuits A to F (121 to 126) detect the peak of the detection signal from each sensor plate by the above-described operation, and the terminal is inserted into the connector from the peak value detected by each sensor plate. Detects position and insertion depth.

  When the cut piezoelectric wire terminal is attached to the connector and the detection of the attachment position is completed, the process proceeds to step S7, and the inspection control unit 100 moves to the predetermined connector position of the cut piezoelectric wire terminal to which the AC signal is applied. It is determined whether or not it is detected that the insertion has been performed and the insertion depth has been reached to an appropriate position.

  The detection of the end of mounting of the cut piezoelectric wire terminal to the connector 10 is preferably determined, for example, based on whether or not a certain time has elapsed after the peak detection voltage Vz1 of the Z-axis sensor plate 40a exceeds a predetermined value. .

  Alternatively, the mounting may be ended when the mounting of the cut piezoelectric wire terminal to the desired position and depth is not detected even after a predetermined time has elapsed. Further, the mounting may be completed when the cut piezoelectric wire terminal is mounted in the connector 10 and the position of the terminal does not change for a certain time.

  That is, when the detection signal level from each sensor plate (20a, 20b, 30a, 30b, 40a, 40b) is equal to or higher than a certain level and does not change for a certain time, it is determined that the insertion of the cut piezoelectric wire terminal is completed. Can be considered. It is desirable to determine the end of wearing by combining some of the above methods.

  In the present embodiment, when the terminal is not mounted in the normal position, the insertion depth is not sufficient, or the terminal is deformed, each sensor plate (20a, 20b, 30a, 30b, 40a) is used. , 40b) is different from the case where the detection signal is normal.

  For this reason, the detection signal value when the normal terminal is inserted into the normal position in advance is measured and compared with the detection signal value when the normal terminal is inserted at the wrong position, for example, the adjacent position, or The detection signal value when the deformed terminal is inserted at a normal position is compared, and a threshold value for determining that the normal terminal is inserted at the normal position is obtained from these measurement detection signal values, and the detection signal is obtained. Whether the value is within the threshold range or outside the range can be determined.

  Using this, for example, the insertion position is determined by comparing the detection result when the correct cut piezoelectric wire terminal is inserted in advance with the detection result when the operator attaches the cut piezoelectric wire terminal. When the error is within a predetermined range, it is determined that the wearing is normal.

  In step S7, when it is not detected that the cut piezoelectric wire terminal to which the AC signal is applied is inserted into the predetermined connector position and the insertion depth is also reached to an appropriate position, the process proceeds to step S8. Go ahead and identify the cause of failure.

  For example, when the insertion of the terminal is hardly detected, it is determined that the cut piezoelectric wire base for taking out the cut piezoelectric wire terminal is mistaken and the cut piezoelectric wire terminal that should not be attached is attached, and the difference in the XY detection values Determines that the insertion position into the connector is wrong, and specifies the position of the connector that is erroneously inserted.

  In addition, a lack of detection values of the Z-axis sensor plates 40a and 40b may be determined as terminal insertion failure.

  In step S9, the operator is notified of the occurrence of a defect and its cause. The occurrence of a defect is notified by an alarm sound and a blinking display of an error part, for example, a cause is displayed on a display panel (not shown), and a defective part and a correct insertion position are displayed.

  Upon receiving this error notification, the worker performs necessary error processing. For example, when the insertion is insufficient, the insertion is sufficiently deep, and when the insertion position is incorrect, the inserted piezoelectric wire terminal is removed, and another new piezoelectric device is inserted into the connector 10. It will be.

  On the other hand, when the inspection control unit 100 detects in step S7 that the cut piezoelectric wire terminal to which the AC signal is applied has been inserted into a predetermined connector position and the insertion depth has been reached to an appropriate position. In step S10, it is determined whether or not the mounting of the cut piezoelectric wire terminals to the connector 10 has been completed. When all the mounting of the cut piezoelectric wire terminals to the connector 10 is completed, this is notified by, for example, an end sound, and the mounting of the terminals to the connector is terminated.

  In step S10, if all the mounting of the cut piezoelectric wire terminals to the connector 10 has not been completed, the process proceeds to step S15, and the cut piezoelectric wire frame holding the cut piezoelectric wire terminal to be mounted next and the connector 10 The position to be stored is specified, and the process proceeds to step S3.

  As described above, according to this embodiment, a conductive region (feeding portion) is provided in a part of the cut piezoelectric wire holding portion of the cut piezoelectric wire mount 500 that holds the cut piezoelectric wire to be attached to the connector, By simply supplying a low-voltage AC signal to the area as an inspection signal, the conductive material of the cut piezoelectric wire held by the cut piezoelectric wire holding part does not come into contact with other conductive materials, etc. The inspection signal can be applied in a completely non-contact manner from the middle portion of the terminal, and the insertion state of the terminal can be detected by the sensor plate when the cut piezoelectric wire terminal to which the inspection signal is applied is attached to the connector.

  In this way, since the inspection signal can be applied to the cut piezoelectric wire in a non-contact manner, even if the terminals are attached to both ends of the cut piezoelectric wire, the cut piezoelectric wire is inspected via the intermediate coating. A signal can be applied, and at the same time, it is possible to inspect the mounting state of the terminals at both ends to the connector. For this reason, it is possible to inspect whether the cut piezoelectric wire is correct or incorrect in the process of manufacturing the wire harness, whether the insertion position is correct, and the like, and an efficient wire harness can be manufactured.

  Moreover, since an inspection signal can be applied from the middle part of the harness attached to the connector as described above, the inspection can be performed in exactly the same manner even when harnesses having different lengths are mixed.

  In the present embodiment, the inspection control unit 100 uses a relative value, for example, a difference value, of the detection signals of each pair of sensor plates to inspect the inspection signal (AC signal) applied to the cut piezoelectric wire. Therefore, it is possible to provide a highly reliable apparatus in which the influence of fluctuations in the supply efficiency of the inspection signal is minimized.

  Therefore, for example, a good inspection signal can be supplied without bringing a probe for supplying an inspection signal directly into contact with the cut piezoelectric wire.

  Furthermore, in the present embodiment, the intermediate portion of the cut piezoelectric wire 300 laid over the work wire holding portion 560 is brought into close contact with the power feeding portion 570, and a satisfactory inspection signal application is realized.

  In addition, the shape of the cut piezoelectric wire holding portion 550 and the working electric wire holding portion 560 of the cut piezoelectric wire frame is not limited to the shape of the kamaboko shape (arch shape) shown in FIG. A cylindrical shape may be sufficient and a square shape may be sufficient. A rectangular base surface may be used as long as it can hang a cut piezoelectric wire.

  As described above, the cut piezoelectric wire frame according to the present embodiment is not limited to the case where the cut piezoelectric wire terminals are mounted at both ends, but the cut piezoelectric wire branches in the middle, and the cut piezoelectric wire is halfway when the connector is mounted. Even a cut piezoelectric wire that may be caught can be attached to and detached from the connector while being securely held.

  In the above description, the surface structure of the power feeding unit has not been described. However, the power feeding unit may have a conductive material exposed on the surface or may be coated with an insulating material. This is because the inspection signal can be applied to the cut piezoelectric wire in a non-contact manner, and any shape and structure can be used as long as electromagnetic waves are transmitted.

Moreover, even if there is deterioration of the surface of the power feeding unit, there is almost no influence on the performance as the power feeding unit, and stable power feeding performance can be maintained.
[Second Embodiment]

  In the above description, the example in which the inspection signal is applied to the intermediate portion of the cut piezoelectric wire by the kamaboko-shaped cut piezoelectric wire mount has been described. However, the present invention is not limited to the above example, and an inspection signal is supplied to the cut piezoelectric wire via the hand (finger portion) of an operator who pinches the end of the cut piezoelectric wire and attaches the terminal to the connector. It is good also as a structure.

  By comprising in this way, an inspection signal can be reliably supplied to a cut piezoelectric wire, without providing a special structure in cut piezoelectric wire holding parts, such as a cut piezoelectric wire stand.

  FIG. 7 shows a second embodiment according to the present invention in which an inspection signal is supplied to the cutting piezoelectric wire through the hand (finger portion) of an operator who pinches the end of the cutting piezoelectric wire and attaches the terminal to the connector. This will be described below with reference. FIG. 7 is a diagram for explaining a configuration for supplying an inspection signal to the cut piezoelectric wire according to the second embodiment of the present invention.

  In the second embodiment, the same configuration as that of the above-described first embodiment can be applied as it is except that the inspection signal is applied to the cut piezoelectric wire. Therefore, in the following description, only the configuration different from the above-described first embodiment will be described, and description of common parts will be omitted.

  In FIG. 7, reference numeral 750 denotes a glove that is used by the operator's hand. The surface of the sewing material constituting the glove or the sewing material is formed into a multi-layer structure, and a conductive sheet is disposed at an intermediate portion thereof.

  In the example of FIG. 7, a sewing material having a three-layer structure of 761, 762, and 763 is formed into a glove shape, and an intermediate portion is formed of a conductive sheet 762. Note that the conductive sheet 762 is sewn so as to be electrically conductive at all portions.

  A part 762a of the conductive sheet 762 is drawn to the outside as a connection portion, and the glove 750 can be shielded from the operator's hand by connecting the clip 770 maintained at the ground level. It is.

  When the wire harness is manufactured, for example, the thumb and forefinger are covered with finger sacks 781 and 782 that constitute a feeding portion for an inspection signal made of a conductive material. The finger sac is formed of a conductive material, and each finger sac is connected to an inspection signal supply unit. When an inspection signal is supplied from the inspection signal supply unit, the finger sac is pinched via the working finger sacks 781 and 782. An AC inspection signal can be applied to the cut piezoelectric wire.

  Conventionally, finger sacks made of a conductive material have been used mainly to prevent production failure due to static electricity. As a result of finding the opposite use method of applying an inspection signal to, the inspection signal can be reliably applied to the cut piezoelectric wire with a simple configuration.

  In addition, this finger sack is not limited to a case where the finger sack is molded into an integral type, but may be one in which a fingertip portion is covered by winding a conductive tape around a finger.

  Furthermore, a finger sack from which the fingertip portion is removed may be used as long as it is made of a conductive material. When this finger sack is attached to the glove 750, the fingertip portion becomes more free, and the work efficiency is further improved.

  That is, the glove 750 is worn to connect the conductive sheet 762 to the ground level, and the finger sucks 781 and 782 are worn to connect the finger sucks 781 and 782 to the inspection signal supply unit. Then, an operator wearing the glove 750 with the cut piezoelectric wire to be attached to the connector housing pinches the vicinity of the terminal of the cut piezoelectric wire to be attached to the connector housing, and inserts a terminal pinched at a predetermined position of the connector housing.

  At this time, the cutting piezoelectric wire is in contact with the finger sucks 781 and 782, but if an inspection signal is supplied to the finger sucks 781 and 782, the inspection signal is applied to the cutting piezoelectric wire. For this reason, the inspection signal is applied to the terminal portion, and it is possible to inspect whether the terminal is inserted at the correct position in the connector housing. At this time, directly pinching the base portion of the terminal only changes the supply efficiency of the inspection signal, and there is no problem.

  As described above, according to the second embodiment, a glove that prevents an operator from getting rough due to work without providing a special complicated jig for applying an inspection signal to the cut piezoelectric wire is provided. By utilizing this, it is possible to reliably apply the inspection signal without bringing the inspection probe into contact with the conductor of the cut piezoelectric wire. In particular, the inspection signal can be applied to the cut piezoelectric wire while performing the wire harness manufacturing operation as usual, and it is possible to reliably inspect the erroneous insertion of the cut piezoelectric wire in the wire harness manufacturing process only by providing the inspection signal detection device .

  In the above description, the glove has a three-layer structure and the conductive sheet is disposed in the intermediate layer. However, the present invention is not limited to the above example, and the entire glove is made of a conductive material (such as conductive rubber). It may be formed. In this case, the glove can be easily maintained at the ground level.

  In this case, for example, a finger sack, which is a power feeding unit to which an inspection signal to be attached to the fingertip part is supplied, is provided with an insulating layer on the contact surface with the glove, and is in an electrically non-contact state with the glove part. There is a need to.

  The insulating layer may be a finger sack made of a thin insulating material that covers the entire finger, for example, and a conductive small finger sack may be mounted on the finger sack. By configuring in this way, the configuration of the glove can be simplified, and a part of a commercially available conductive glove may be connected to a ground level ground wire and an end clip.

It is a figure which shows the structural example of the cut piezoelectric wire stand of the embodiment of one invention concerning this invention. It is a schematic diagram for demonstrating the basic principle of the mounting state confirmation apparatus of the terminal which detects the harness terminal mounting state to the connector using the cut piezoelectric wire stand of the example of 1 invention concerning this invention.

It is a figure for demonstrating the detailed structure of the test | inspection signal process part of the test | inspection control part of this Embodiment. It is a figure which shows the example of a detection in the test | inspection control part of this Embodiment. It is a figure which shows the example of the connector holding part of the example of this embodiment.

It is a flowchart for demonstrating cutting piezoelectric wire terminal mounting control to the connector using the cutting piezoelectric wire stand of the example embodiment. It is a figure for demonstrating the structure which supplies a test | inspection signal to the cut piezoelectric wire of the 2nd Example of this invention.

Explanation of symbols

10, 710, 720 Connector housing (connector)
20a, 20b Y-axis sensor plate 30a, 30b X-axis sensor plate 40a, 40b Z-axis sensor plate 60 Connector holding unit 61 Connector storage unit 100 Inspection control unit 111-116 Amplifiers A-F
121-126 Peak detection circuits A-F
131 X-axis adder circuit 132 Y-axis adder circuit 133 Z-axis difference circuit 141 X-axis divider circuit 142 Y-axis divider circuit 143 Z-axis divider circuit 200 Insertion position indicating unit 300 Cutting piezoelectric wire 500 Cutting piezoelectric wire frame 510 Base unit 520 Standing arm portion 530 Cutting piezoelectric wire holding portion 551,552 Guide plate 560 Working electric wire holding portion 570 Power feeding portion 600 Working table 710,720 Connector 750 Gloves 781,782 Finger suck

Claims (4)

A test signal applying method for applying a test signal to a cut piezoelectric wire constituting a wire harness and having a terminal fixed to at least one end,
The AC signal is used as an inspection signal, and the cut piezoelectric wire to be worked is suspended and held on the holding portion, and conductive near the hanging holding surface of the cut piezoelectric wire so as to be in contact with or close to the covering material of the cut piezoelectric wire. positioning a feeding part formed of wood, the switching to the piezoelectric wire supplying the test signal to the power feeding unit while maintaining the state of holding and subjected to the bet holder of those該切piezoelectric line terminal and the internal conductors A test signal applying method comprising: applying a test signal in a non-contact manner and allowing the terminals to be mounted in a connector housing while maintaining the state in which the test signal is applied. An inspection signal applying apparatus capable of applying an AC inspection signal to a cut piezoelectric wire having a terminal fixed to at least one end constituting a wire harness,
At least a power supply means formed of a conductive material capable of supplying an inspection signal;
Positioning means for positioning at least a part of the conductive material portion of the power supply means in contact with or close to the covering material of the cut piezoelectric wire;
The positioning means includes a suspension holding portion that can suspend and hold a cut piezoelectric wire, and suspends at least the cut piezoelectric wire of the suspension holding portion and disposes the conductive material of the power feeding means in the vicinity of the holding surface,
A test signal is applied in a non-contact manner to the terminal and the internal conductor of the cut piezoelectric wire while the cut piezoelectric wire is suspended and held, and the test signal is applied and the terminal can be mounted in the connector housing. Inspection signal supply device characterized by the above. The hanging holding portion has a cut piezoelectric wire holding portion formed in a cross-section of a cross section that can hold and hold a plurality of cut piezoelectric wires.
3. The inspection signal supply apparatus according to claim 2 , wherein a power feeding means having the conductive material disposed thereon is disposed in the vicinity of a tip portion continuous with the cut piezoelectric wire holding portion. An inspection signal supply device that is capable of applying an AC inspection signal to a cut piezoelectric wire constituting a wire harness and having a terminal fixed to at least one end,
  Power supply means formed of a finger sac-like conductive material capable of supplying the AC inspection signal;
  It is formed in a glove shape that can be worn by an operator during work, and an insulating layer is provided at least at the tip of the finger that pinches the cut piezoelectric wire. A cutting piezoelectric wire holding means provided with a conductive sheet coated with a conductive material and provided on the other surface of the insulating layer and maintained at an installation level formed of a conductive material;
  By supplying the AC inspection signal to the finger suck-like conductive material while maintaining the cut piezoelectric wire holding state in which the cut piezoelectric wire is pinched by the finger suck-like conductive material, the terminal and the inner conductor of the cut piezoelectric wire are supplied. The inspection signal supply device is characterized in that the AC inspection signal is applied in a non-contact manner, and the terminal can be mounted in the connector housing while the AC inspection signal is applied.

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