JPWO2014002721A1 - Electric wire processing device and electric wire state detection method of electric wire processing device - Google Patents

Abstract

We propose a new configuration for the wire processing device that is flexible and capable of more accurate defect determination according to the application. The electric wire processing apparatus 100 is a first electric wire state detector that detects the state of the covered electric wire 150 based on the position of the blade 104 detected by the blade position detector 106 and the high-frequency signal detected by the signal detector 110. 112 is included.

Description

  The present invention relates to an electric wire processing apparatus for processing a covered electric wire whose core wire is covered with an insulator, and an electric wire state determination method for the electric wire processing apparatus.

  As an electric wire processing apparatus for processing a covered electric wire, for example, in Japanese Patent Application Laid-Open No. 7-227002, an AC signal is connected to a cutter, and an electric signal is detected by a detection head close to the covered electric wire. A configuration for detecting contact (cutting) is disclosed.

  In Japanese Patent No. 3261529, a pair of electrodes is formed by an electrode element and a cutting blade disposed in proximity to an arbitrary portion of a covered electric wire, and based on the displacement of electric capacity between the pair of electrodes generated when cutting into the covering, It is disclosed that a perspective relationship between a cutting blade and a core wire of a covered electric wire is detected.

  In Japanese Patent Laid-Open No. 2008-283825, the voltage of the measurement signal is adjusted to make the current or voltage of the detection signal correspond to the threshold for erroneous contact detection, or the frequency of the alternating current when the measurement signal is an alternating current. It has been proposed to adjust the threshold and the threshold.

  Japanese Patent Application Laid-Open No. 2008-295209 proposes a strip device having a function of accurately detecting that the core wire is damaged when the strip blade cuts into the insulator of the covered electric wire. For example, a voltage is applied between the core wire of a covered electric wire and a pair of blades, and the core wire and the pair of blades between the time when the pair of blades starts moving in a direction approaching each other and the strip operation starts. And detecting that a voltage is applied between the two.

  Japanese Patent No. 4883821 proposes a structure using a blade as an electrode. In this document, the wire covering material peeling device is arbitrarily set at a target time or time for detecting whether or not the cutter has contacted the core wire, and at the start of the peeling operation, immediately before or during the end, and further, It describes that it has the function to manage each temporal element of contact time. Further, it is described that a determination condition that does not result in a defective product can be set depending on the contact time or the contact location even when the blade contacts the core wire by the management function of the temporal element.

  Specifically, it is described that even if a slight contact is made at the beginning of the strip process from the time of cutting, it is determined that the contact is not good in the subsequent processes even if it is judged that the contact is slight. Further, it is described that the determination is arbitrarily set by using a temporal management function such as not detecting contact between the blade and the core wire just before the end of the strip process. Further, it is described that minute contact scratches at the tip that occur just before the end of the strip process can be excluded from the determination target.

  Further, the same document describes that the time during which the core wire of the electric wire and the blade are kept in contact with each other is also used as a criterion for determination. Specifically, if the core of the electric wire and the blade are kept in contact with each other for a long time, a long and deep scratch is made, and if the contact is made for a very short time, the wire is not damaged depending on the degree. Therefore, it is described that by sampling the contact time between the core of the electric wire and the blade in microsecond units, it is possible to discriminate between a very short time contact that does not affect the quality and a long time contact, and to use this as a criterion. Has been. In addition, it is described that the element device of the time management function is replaced with a position information device such as an encoder or a magnet scale.

Japanese Patent Laid-Open No. 7-227022 Japanese Patent No. 3261529 JP 2008-283825 A JP 2008-295209 A Japanese Patent No. 4883821

  By the way, an apparatus (method) for detecting contact between a blade and a core wire using electrostatic coupling has been proposed by, for example, Patent Document 1. By this method, the contact between the blade and the core wire can be detected with high accuracy. Thereby, for example, it is possible to detect the presence or absence of scratches on the core wire due to strip processing (peeling processing). However, when contact between the blade and the core wire is detected, if all of them are determined to be defective, the yield decreases. For example, depending on the use of the electric wire, even if there is a contact between the blade and the core wire, there is a case where it is not necessary to make it defective as long as the flaw is not deep. On the other hand, in applications where safety needs to be ensured, even slight contact between the blade and the core wire in strip processing may not be permitted. Thus, the electric wire processing apparatus which can perform flexible defect determination according to a use is not fully established.

  For example, Patent Document 5 also discloses an electric wire covering material peeling device having a function of managing each temporal element of contact time of a blade with respect to a core wire. However, it is not disclosed clearly and sufficiently to enable a person skilled in the art to practice, and it is unclear how to manage it specifically. For example, Patent Document 5 describes that even if the blade contacts the core wire, depending on the contact time or contact location, it is possible to set a determination condition that does not result in a defective product. Is not disclosed at all and is unknown. Here, a new configuration is proposed for the electric wire processing apparatus that is flexible and capable of highly accurate defect determination according to the application.

  The electric wire processing apparatus includes an electric wire holder, a blade disposed so as to be movable back and forth with respect to the covered electric wire held by the electric wire holder, and a blade driving mechanism that moves the blade. The wire state detection method of the wire processing apparatus proposed here includes a high-frequency signal generation process that generates a high-frequency signal in the core wire via an insulator, and a blade position detection process that detects the position of the blade that is moved by the blade drive mechanism. First, the state of the covered electric wire is detected based on the signal detection process for detecting the high-frequency signal generated in the core wire, the blade position detected by the blade position detection process, and the high-frequency signal detected by the signal detection process. 1 electric wire state detection processing.

  According to the electric wire state detection method of the electric wire processing apparatus, the processing state of the covered electric wire can be detected based on the position of the blade and the high frequency signal. For example, since not only the contact between the blade and the core wire but also the position of the blade moving by the blade drive mechanism is detected, the timing of contact between the blade and the core wire can be clearly detected. For this reason, it is possible to detect how much the blade has been in contact with the core wire, how long it has been in contact with the core wire, and the like, and it is possible to accurately detect the degree of scratches that may have occurred on the core wire.

  In this case, a process of detecting contact between the core wire of the covered electric wire and the blade may be included based on the magnitude of the high-frequency signal detected by the signal detection process. Moreover, the 1st abnormality determination area may be set to the movement area | region where a blade moves. In this case, since the abnormality determination area is set for the movement region of the blade, the degree of damage that may have occurred on the core wire can be determined more easily.

  In this case, a plurality of areas may be set in the moving region in which the blade moves, and the first abnormality determination area may be selected from the plurality of areas. Moreover, when a contact is not detected in all the areas set in the movement area, a process of determining the wire process as abnormal may be included. Moreover, the process of determining whether the position of the blade at the time of a contact being detected is a 1st abnormality determination area may be included. Moreover, when a contact is detected in the first abnormality determination area, a process of determining the wire process as abnormal may be included.

  The blade may have a blade shape having a depression at the center, and may be constituted by a pair of blades arranged so as to face the depression. In this case, the blade driving mechanism may be a mechanism that drives the pair of blades so that the pair of blades are closed or opened. Moreover, the 1st abnormality determination area may be set to the area | region where the space | interval of the center part of a pair of blade is larger than the outer diameter of a covered electric wire. Moreover, it is good for the electric wire state detection method to include the process which determines the said electric wire process as abnormality, when a contact is detected in the said 1st abnormality determination area.

  The electric wire processing apparatus includes a covered electric wire drive mechanism that relatively moves the covered electric wire and the blade along the longitudinal direction of the covered electric wire so that the covered electric wire held by the electric wire holder is separated from the blade. Also good. In this wire processing apparatus, the coated wire and the blade are arranged in the longitudinal direction of the coated wire so that the coated wire is separated from the blade in a state where the blade is bitten into the insulator of the coated wire held by the wire holder. It is preferable that a strip process for stripping the insulator can be performed by relatively moving along the surface. In this case, the electric wire state detection method of the electric wire processing apparatus is based on the relative position of the covered electric wire and the blade, which is moved by the covered electric wire driving mechanism, and the electric signal detected by the signal detection processing in the strip processing. The second electric wire state detection process for detecting the state of the covered electric wire may be included. In this case, a second abnormality determination area may be set for the relative movement region between the covered electric wire and the blade. A plurality of areas may be set in the relative movement region between the covered electric wire and the blade, and the second abnormality determination area may be selected from the plurality of areas.

  The proposed wire processing apparatus includes an electric wire holder, a blade, a blade driving mechanism, a high-frequency signal generator, a blade position detector, a signal detector, and a first electric wire state detector. May be. Here, the electric wire holder is a device that holds a covered electric wire including a core wire and an insulator that covers the core wire. The blade is arranged so as to be movable forward and backward with respect to the covered electric wire held by the electric wire holder. The blade drive mechanism is a device that moves the blade. A high-frequency signal generator is a device that generates a high-frequency signal in a core wire via an insulator. The blade position detector is a device that detects the position of the blade that is moved by the blade drive mechanism. The signal detector is a device that detects a high-frequency signal generated in the core wire. The first electric wire state detector is a device that detects the state of the covered electric wire based on the blade position detected by the blade position detector and the high-frequency signal detected by the signal detector.

  According to this electric wire processing apparatus, the electric wire state detection method mentioned above can be embodied, and the processing state of the covered electric wire can be detected based on the position of the blade and the electric signal. Thus, for example, it is possible to detect how much the blade has been in contact with the core wire, how long it has been in contact with the core wire, and the like, and it is possible to accurately detect the degree of damage that may have occurred on the core wire.

  Moreover, the electric wire processing apparatus may be provided with the 1st area setting part which sets a 1st abnormality determination area with respect to the movement area | region where a blade moves. Further, the wire processing apparatus includes a covered wire drive mechanism that moves the covered wire and the blade relatively along the longitudinal direction of the covered wire so that the covered wire held by the wire holder is separated from the blade, You may provide the relative position detector which detects the relative position of a covered electric wire and a blade which moves with an electric wire drive mechanism.

  The electric wire processing apparatus detects the state of the covered electric wire based on the relative position between the covered electric wire and the blade detected by the relative position detector and the high-frequency signal detected by the signal detector. A two-wire state detector may be provided.

  Moreover, the electric wire processing apparatus may be provided with the 2nd area setting part which sets a 2nd abnormality determination area with respect to the relative movement area | region of a covered electric wire and a blade.

  Here, the high-frequency signal generator may include an electrode facing the core member via an insulator of the covered electric wire, and a high-frequency power source electrically connected to the electrode. Further, the high frequency signal generator may include a high frequency power source electrically connected to the blade.

FIG. 1 is a diagram illustrating a configuration example of the wire processing apparatus proposed here. FIG. 2 is a diagram showing the covered electric wire 150. FIG. 3 is an equivalent circuit diagram of the wire processing apparatus shown in FIG. FIG. 4 is a diagram illustrating a detection example of the position (state) of the blade detected by the blade position detector and the electrical signal detected by the signal detector. FIG. 5 is a diagram showing an example of detection of the blade position (state) detected by the blade position detector and the electrical signal detected by the signal detector. FIG. 6 is a diagram showing the relationship between the blade and the covered electric wire in the case of FIG. FIG. 7 is a diagram illustrating an example of detection of the blade position (state) detected by the blade position detector and the electrical signal detected by the signal detector. FIG. 8 is a diagram showing the relationship between the blade and the covered electric wire in the case of FIG. FIG. 9 is a diagram illustrating a detection example of the position (state) of the blade detected by the blade position detector and the electrical signal detected by the signal detector. FIG. 10 is a diagram illustrating a detection example of the relative position between the covered electric wire and the blade and the electric signal detected by the signal detector. FIG. 11 is a diagram illustrating a detection example of the position (state) of the blade detected by the blade position detector and the electrical signal detected by the signal detector. FIG. 12 is a diagram illustrating an example of the state of the covered electric wire in the case of FIG. 11. FIG. 13 is a diagram illustrating a detection example of the position (state) of the blade detected by the blade position detector and the electrical signal detected by the signal detector. FIG. 14 is a diagram illustrating an example of the state of the covered electric wire in the case of FIG. 13. FIG. 15 is a diagram illustrating a detection example of the relative position between the covered electric wire and the blade and the electric signal detected by the signal detector. FIG. 16 is a diagram illustrating an example of the state of the covered electric wire in the case of FIG. 15. FIG. 17 is a diagram illustrating an example of the state of the covered electric wire in the case of FIG. 15. FIG. 18 is a diagram illustrating a detection example of the relative position between the covered electric wire and the blade and the electric signal detected by the signal detector. FIG. 19 is a diagram illustrating a detection example of the relative position between the covered electric wire and the blade and the electric signal detected by the signal detector. FIG. 20 is a diagram illustrating an example of the state of the covered electric wire in the case of FIG. FIG. 21 is a diagram illustrating a configuration example of an electric wire processing apparatus according to another embodiment of the present invention. FIG. 22 is an equivalent circuit diagram of the wire processing device shown in FIG. FIG. 23 is a diagram illustrating a configuration example of an electric wire processing apparatus according to another embodiment of the present invention. 24 is an equivalent circuit diagram of the wire processing apparatus shown in FIG. FIG. 25 shows the relationship between the position of the strip blade and the detected waveform for the wire processing apparatus shown in FIG. FIG. 26 is a diagram illustrating a configuration example of an electric wire processing apparatus according to another embodiment. FIG. 27 is an equivalent circuit diagram of the wire processing apparatus shown in FIG. FIG. 28 is a schematic diagram of the F-side nozzle. FIG. 29 shows an example of the processing flow of wire processing. FIG. 30 shows an example of the processing flow for pass / fail judgment included in FIG.

  Hereinafter, the electric wire state detection method of the electric wire processing apparatus proposed here and the electric wire processing apparatus which can embody the said method are demonstrated. The drawings are schematically drawn, and the present invention is not limited to these drawings unless otherwise specified. Moreover, the same code | symbol is attached | subjected suitably to the member or site | part which has the same effect | action.

≪Wire processing device 100≫
FIG. 1 is a diagram illustrating a configuration example of the electric wire processing apparatus 100. As shown in FIG. 1, the wire processing apparatus 100 includes a wire holder 102, a blade 104, a blade drive mechanism 105, a blade position detector 106, a high-frequency signal generator 108 (high-frequency power source 240), and signal detection. 110, first wire state detector 112, first section setting unit 114, covered wire drive mechanisms 116F and 116R, relative position detectors 118F and 118R, second wire state detectors 120F and 120R, A second zone setting unit 122 is provided. Here, the signal detector 110 and the high-frequency power source 240 can be incorporated into the electrical arithmetic processing system as the flaw detection circuit 200.

  The electric wire processing apparatus 100 shown in FIG. 1 is an apparatus that cuts the supplied covered electric wire 150 with a predetermined length and strips both ends 150F and 150R of the cut covered electric wire 150 (striping treatment). . Here, of the cut end portions 150F and 150R of the covered electric wire 150, the tip 150F (cut tip) of the covered electric wire 150 to be sent is appropriately referred to as “F side (front)”. Further, the cut rear end 150R of the covered covered electric wire 150 (the rear end of the cut covered electric wire 150) is appropriately referred to as “R side (rear)”.

≪Wire retainer 102≫
Here, the electric wire holder 102 is an apparatus for holding the covered electric wire 150 as shown in FIG. FIG. 2 is a diagram showing the covered electric wire 150. As shown in FIG. 2, the covered electric wire 150 includes a core wire 152 and an insulator 154 that covers the core wire 152. In this embodiment, an F-side nozzle 201, an R-side grip 202, an electric wire feeding mechanism 204, and a wire drawing machine 206 are provided as a mechanism for conveying the covered electric wire 150. Among these, the F-side nozzle 201 functions as the F-side electric wire holder 102. The R-side grip 202 functions as the R-side electric wire holder 102.

  Here, the wire feeding mechanism 204 is a mechanism that adjusts the feed amount (return amount) of the covered wire 150. The F-side nozzle 201 is a nozzle that sends the covered electric wire 150 to the portion where the blade 104 is provided. FIG. 28 is a schematic diagram of the F-side nozzle 201. In this embodiment, as shown in FIG. 28, the F-side nozzle 201 includes a through hole 301 through which the covered electric wire 150 is inserted and a gripping mechanism 302 that holds the covered electric wire 150. The through-hole 301 of the F-side nozzle 201 is tapered toward the part where the blade 104 is provided. According to the through hole 301, the covered electric wire 150 can be appropriately guided to the portion where the blade 104 is provided. The gripping mechanism 302 is configured inside the F-side nozzle 201 and grips the covered electric wire 150 inserted through the through hole 301. In this embodiment, as shown in FIG. 1, the R-side grip 202 is disposed on the far side of the blade 104 with respect to the F-side nozzle 201. The R-side grip 202 is a member that grips the covered electric wire 150 led out from the F-side nozzle 201 on the other side of the blade 104.

≪Blade 104≫
The blade 104 is disposed so as to be movable back and forth with respect to the covered electric wire 150 held by the electric wire holder 102. In this embodiment, a cutting blade 221 and three blades of strip blades 222 and 223 (peeling blades) on the F side and the R side are provided. The cutting blade 221 is a blade that sandwiches the covered electric wire 150. The F-side and R-side strip blades 222 and 223 are blades that cut the insulator 154 (see FIG. 2) of the covered electric wire 150 and strip the insulator 154, respectively. The cutting blade 221 and the strip blades 222 and 223 are each composed of a pair of blades each having a blade shape with a depressed center.

  The blades 104 are arranged in the order of the strip blade 222, the cutting blade 221, and the strip blade 223. The coated electric wire 150 to be processed first is subjected to a cutting process on the front end, and then a strip process (a cutting process and a peeling process) is performed on the F-side end part 150 </ b> F by the strip blade 222. After strip processing (cutting processing and peeling processing) is performed on the F-side end portion 150F, the covered electric wire 150 is sent to the R-side grip portion 202, and the R-side end portion 150R is cut. Here, of the both ends of the cut covered electric wire 150, the end of the covered electric wire 150 on the side held by the R-side gripping portion 202 is an R-side end portion 150 </ b> R and is held by the F-side nozzle 201. An end portion of the side covered electric wire 150 becomes an end portion 150F on the F side. Here, after the R-side end 150R is cut, the R-side end 150R and the F-side end 150F are respectively subjected to strip processing (cutting processing and skinning processing). At this time, in the first wire processing, the strip processing of the F-side end portion 150F is performed alone. In the second wire processing, the strip processing of the R-side end 150R and the F-side end 150F may be performed in parallel.

  At this time, the wire processing apparatus 100 leads the covered wire 150 from the F-side nozzle 201 to a predetermined length. The derived covered electric wire 150 is passed through a portion where the blade 104 is disposed, and is gripped by the R-side grip portion 202 disposed on the other side of the blade 104. Next, the wire processing apparatus 100 cuts the covered wire 150 with the cutting blade 221. Then, the F-side end portion 150F and the R-side end portion 150R of the cut covered electric wire 150 are stripped (notched and stripped) by stripping the insulator 154 from the core wire 152 by the strip blades 222 and 223, respectively. Is given.

  As described above, in the electric wire processing apparatus 100, the covered electric wire 150 includes the strip processing (cutting processing and peeling processing) of the F-side end portion 150F, a predetermined amount of electric wire feeding, cutting processing, and the R-side end portion 150R. Strip processing (strip processing of the F-side end 150F) is repeated continuously. The end portions 150F and 150R of the covered electric wire 150 subjected to the strip processing (cutting processing and skinning processing) can be configured to be subjected to predetermined processing such as appropriately attaching terminals.

≪Blade drive mechanism 105≫
The blade drive mechanism 105 is a mechanism that moves the blade 104. In this embodiment, the cutting blade 221 and the three blades of the F-side and R-side strip blades 222 and 223 are attached to one blade driving mechanism 105 and are driven simultaneously. The blade drive mechanism 105 includes blade attachment portions 231 and 232, a drive mechanism 233, and an actuator 234.

  The blade attachment portions 231 and 232 are portions for attaching a pair of blades 221, 222, and 223 (in the example shown in FIG. 1, the upper blades 221 a, 222 a and 223 a and the lower blades 221 b, 222 b and 223 b). is there. Lower blades 221b, 222b, and 223b are attached to the blade attachment portion 231. The upper blades 221a, 222a, and 223a are attached to the blade attachment portion 232 so as to face the lower blades 221b, 222b, and 223b, respectively.

  The drive mechanism 233 is a mechanism that operates the blade attachment portions 231 and 232. In this embodiment, the drive mechanism 233 is a mechanism that relatively opens and closes the upper and lower blade mounting portions 231 and 232 along the direction in which the covered electric wire 150 is sandwiched. The drive mechanism 233 can be configured using, for example, a ball screw mechanism. The actuator 234 operates the drive mechanism 233 to open and close the blade 104. In this embodiment, the actuator 234 is configured by a servo motor (for example, an electric motor). The pair of upper and lower blades are operated through the drive mechanism 233. In this embodiment, the pair of upper and lower blades are opened and closed along the radial direction of the covered electric wire 150 by the drive mechanism 233. Further, the pair of upper and lower blades move in synchronization with each other, and open and close by moving the same amount at the same timing.

  In this embodiment, the blade drive mechanism 105 is a mechanism that moves a pair of blades simultaneously to open and close. The blade driving mechanism 105 may be a mechanism that moves the blade in the cutting process or the strip process (the cutting process and the peeling process). The blade driving mechanism 105 is not limited as to how the blade moves unless otherwise specified. For example, one of the pair of blades may be a fixed blade and the other may be a movable blade. The cutting blade 221, the F-side strip blade 222, and the R-side strip blade 223 may be attached to different drive mechanisms.

<< Blade position detector 106 (Blade position detection process) >>
The blade position detector 106 is a device that detects the position of a pair of blades moved by the blade driving mechanism 105. In this embodiment, the encoder 235 is attached to an actuator 234 (servo motor). Thereby, the specific positions of the upper blades 221a, 222a, and 223a and the lower blades 221b, 222b, and 223b moved by the blade driving mechanism 105 can be grasped.

<< High-frequency signal generator 108 (high-frequency signal generation processing) >>
The high frequency signal generator 108 is a device that generates a high frequency signal in the core wire 152. In this embodiment, the high-frequency signal generator 108 includes a high-frequency power source 240 and the blades 221, 222, and 223.

≪High-frequency power supply 240≫
The high frequency power supply 240 is electrically connected to the blade 104 and applies a high frequency voltage to each blade 221, 222, 223. Here, a high frequency constant voltage power source is used as the high frequency power source 240. Here, the “constant voltage power source” is a power source set so as to keep the output voltage at a constant set value without being influenced by the fluctuation of the load. In this embodiment, each blade 221, 222, 223 is electrically connected to the high frequency power supply 240 through the blade mounting portions 231, 232. A common high frequency voltage is applied to each of the blades 221, 222, and 223 from a high frequency power supply 240. Further, each blade 221, 222, 223 is insulated from other devices except the high frequency power supply 240.

  Each blade 221, 222, 223 is close to the core wire 152 (see FIG. 2) of the covered electric wire 150 and appropriately contacts in a cutting process or a strip process (a cutting process and a peeling process). In this embodiment, when each blade 221, 222, 223 and the core wire 152 of the covered electric wire 150 are close to each other, a high-frequency signal is generated in the core wire 152 by electrostatic coupling. Moreover, when each blade 221, 222, 223 and the core wire 152 of the covered electric wire 150 contact, each blade 221, 222, 223 and the core wire 152 are electrically connected. For this reason, a high-frequency signal equivalent to the high-frequency signal generated in each blade 221, 222, 223 is generated in the core wire 152. When each blade 221, 222, 223 and the core wire 152 of the covered electric wire 150 are in contact with each other, the voltage level of the high-frequency signal generated in the core wire 152 is remarkably increased.

  Here, the high frequency power supply 240 is set to a frequency substantially shifted from a frequency band used in other devices of the wire processing apparatus 100. For example, when a frequency band of 10 kHz or less is used in another device of the wire processing apparatus 100, the frequency of the high frequency power supply 240 may be set to about 100 kHz. As a result, it can be reliably distinguished from electrical signals of other devices. In this embodiment, the high frequency power supply 240 uses a high frequency AC power supply having an output frequency of 100 kHz and an output voltage of −5 V to +5 V. For this reason, in the electric wire processing apparatus 100, the frequency band of the electric signal used in other apparatuses and the frequency band of the electric signal (high-frequency signal) caused by the high-frequency power supply 240 do not overlap with each other. It is easy to detect high frequency signals.

  Moreover, in the form shown in FIG. 1, the high frequency voltage common to each blade 221, 222, 223 is applied. In this case, the blades 221, 222, and 223 may be configured to be electrically connected, and the F-side and R-side input systems can be configured with a single power system.

<< Electrodes 242, 244 >>
In this embodiment, electrodes 242 and 244 for detecting a high-frequency signal (electric signal) generated in the core wire 152 are provided. The electrodes 242 and 244 are arranged in a state of being close to the core wire 152 through an insulator 154 (see FIG. 2). For this reason, electrostatic coupling occurs between the electrodes 242 and 244 and the core wire 152, and an electrical signal corresponding to the high-frequency signal generated in the core wire 152 is generated at the electrodes 242 and 244. In this embodiment, the wire drawing machine 206 that holds the coated electric wire 150 that is sent is the F-side electrode 242. In addition, the R-side grip 202 that grips the cut covered electric wire 150 serves as the R-side electrode 244. The F-side electrode 242 and the R-side electrode 244 are insulated from other devices except for a device that detects a high-frequency signal (electric signal).

<< Signal detector 110 (signal detection processing) >>
The signal detector 110 is a device that detects an electrical signal (high frequency signal). Here, the signal detector 110 detects a signal waveform W0 caused by an electrical signal (high frequency signal) generated (received) at the electrodes 242 and 244. In this embodiment, a signal waveform W0 (see FIG. 4) is input to the signal detector 110 through signal converters 248F and 248R configured by handpass filters, amplifier circuits, and the like. The signal detector 110 is configured by an arithmetic processing device (computer) including an arithmetic device and a storage device. The first wire state detector 112, the first zone setting unit 114, the second wire state detectors 120F and 120R, and the second zone setting unit 122, which will be described later, are realized by software incorporated in the signal detector 110. .

≪First electric wire state detector 112 (first electric wire state detection process) ≫
The first electric wire state detector 112 is based on the position of the blade 104 (each blade 221, 222, 223) detected by the blade position detector 106 and the high-frequency signal detected by the signal detector 110. 150 states can be detected.

≪First area setting unit 114≫
The first area setting unit 114 is a setting unit that sets an abnormality determination area (first abnormality determination area) for the moving region in which the blade 104 moves. Here, the position of the blade 104 is detected by the blade position detector 106. In this embodiment, the first zone setting unit 114 is configured so that the operator can arbitrarily set a plurality of zones with respect to the region that can be detected by the blade position detector 106 with respect to the moving region of the blade 104. Yes. The abnormality determination area (first abnormality determination area) is configured so that the operator can arbitrarily select (in other words, specify) from the plurality of areas.

<< Covered wire drive mechanism 116F, 116R >>
The covered wire drive mechanisms 116 </ b> F and 116 </ b> R relatively move the covered wire 150 and the blade 104 along the longitudinal direction of the covered wire 150 so that the covered wire 150 held by the wire holder 102 is separated from the blade 104. Mechanism. In this embodiment, the F-side covered electric wire driving mechanism 116F includes an F-side nozzle 201 as the electric wire holder 102 and a moving mechanism 252F (for example, moving the position of the F-side nozzle 201 along the extending direction of the covered electric wire 150). , A ball screw mechanism) and an actuator 254F for driving the F-side nozzle 201. The R-side covered wire drive mechanism 116R has an R-side gripper 202 as the wire holder 102 and a moving mechanism 252R (moving mechanism 252R that moves the position of the R-side gripper 202 along the extending direction of the cut covered wire 150). For example, a ball screw mechanism) and an actuator 254R that drives the R-side grip 202 are configured.

≪Relative position detector 118F, 118R≫
The relative position detectors 118F and 118R are devices that detect the relative position (distance) along the longitudinal direction of the covered electric wire 150 between the covered electric wire 150 and the blade 104, which is moved by the covered electric wire driving mechanisms 116F and 116R. . In this embodiment, the relative position detectors 118F and 118R are constituted by encoders 256F and 256R attached to actuators 254F and 254R (servo motors), respectively.

«Second electric wire state detector 120F, 120R (second electric wire state detection process)»
The second electric wire state detectors 120F and 120R detect the state of the covered electric wire 150 based on the relative position between the covered electric wire 150 and the blade 104 and the high-frequency signal detected by the signal detector 110. It is. The relative position (distance) between the covered electric wire 150 and the blade 104 is controlled by the covered electric wire drive mechanisms 116F and 116R.

≪Second area setting unit 122≫
The second zone setting unit 122 is a setting unit that sets a second abnormality determination zone for the relative movement region between the covered electric wire 150 and the blade 104. The relative positions of the covered electric wire 150 and the blade 104 are detected by relative position detectors 118F and 118R. In this embodiment, the second area setting unit 122 allows the operator to arbitrarily select a plurality of relative positions of the covered wire 150 and the blade 104 with respect to an area that can be detected by the relative position detectors 118F and 118R. You can set the area. The second abnormality determination area is arbitrarily selected (in other words, designated) by the operator from the plurality of areas.

  Here, the signal detector 110, the first electric wire state detector 112, the first area setting unit 114, the second electric wire state detectors 120F and 120R, the second area setting unit 122, and the like include an arithmetic unit and a storage unit. The present invention can be realized using a computer that operates according to a predetermined program, a preprogrammed electronic circuit (for example, a system LSI), or the like.

≪Detection of `` Contact''≫
FIG. 3 is a circuit diagram (equivalent circuit diagram) for detecting a high-frequency signal generated in the core wire 152 of the electric wire processing apparatus 100. In this embodiment, the high frequency power supply 240 applies a high frequency voltage controlled to a constant voltage to the blades 104 (the blades 221, 222, and 223). In the circuit diagram shown in FIG. 3, the capacitance C <b> 1 indicates the space capacitance between the blade 104 and the electrode 242. A capacitance C <b> 2 indicates the capacitance between the core wire 152 and the electrode 242. The switch S <b> 1 represents the operation of the blade 104 with respect to the insulator 154 of the covered electric wire 150. That is, the state in which the switch S1 is open indicates that the insulator 154 is interposed between the blade 104 and the core wire 152, and the blade 104 and the core wire 152 are not in contact with each other. The state in which the switch S1 is closed indicates that the blade 104 and the core wire 152 are in contact with each other. In FIG. 3, a part indicated by “G” indicates a part electrically connected to the mechanical ground (reference potential).

  When the blade 104 and the core wire 152 come into contact with each other, the switch S1 is closed in FIG. At this time, the voltage level generated in the electrodes 242 and 244 varies greatly (see FIG. 4). In this embodiment, the core wire 152 and the electrodes 242, 244 constitute a capacitor C2. When the blade 104 contacts the core wire 152, the voltage level of the core wire 152 increases. As the blade 104 and the core wire 152 come into contact with each other and the voltage level of the core wire 152 increases, the voltage level generated at the electrodes 242 and 244 increases. For this reason, the signal detector 110 can detect contact / non-contact between the blade 104 and the core wire 152 based on the voltage level generated in the electrodes 242 and 244.

  In this case, a high frequency voltage is applied to each blade 221, 222, 223 by the high frequency power supply 240. By applying a high frequency voltage to each blade 221, 222, 223, a high frequency voltage is induced in the core wire 152 of the covered electric wire 150. Furthermore, electrostatic coupling occurs between the core wire 152 of the covered electric wire 150 in which the high-frequency voltage is induced and the electrodes 242 and 244, and a high-frequency voltage is induced in the electrodes 242 and 244.

  In this embodiment, a high frequency voltage is applied to each blade 221, 222, 223. For this reason, electrostatic coupling occurs in the core wire 152 proximate to each blade 221, 222, 223 via the insulator 154, and a voltage is induced in the core wire 152 of the covered electric wire 150. At this stage, a voltage of approximately constant level is induced on the electrodes 242 and 244. When each blade 221, 222, 223 contacts the core wire 152, the voltage applied to the blade 221, 222, 223 is directly applied to the core wire 152. For this reason, the level of the voltage induced in the electrodes 242 and 244 is significantly increased. In this way, the contact between each blade 221, 222, 223 and the core wire 152 can be detected based on the voltage level induced in the electrodes 242, 244.

≪Contact judgment based on signal waveform W0≫
In order to detect the contact between each blade 221, 222, 223 and the core wire 152, the high-frequency signal detected by the electrodes 242, 244 is further subjected to a predetermined threshold t1, with respect to the voltage level of the signal waveform W0 after filtering and amplification, You may set t2 (refer FIG. 4). For example, in this embodiment, the high frequency power supply 240 is a high frequency power supply having an output frequency of 100 kHz and an output voltage of −5 V to +5 V. The peak (voltage peak) of the signal waveform W0 varies depending on whether each blade 221, 222, 223 and the core wire 152 are in contact with each other. In this case, threshold values t1 and t2 may be set between the peak voltage levels. For example, when the blades 221, 222, 223 and the core wire 152 are in contact with each other, the voltage level (peak voltage) is about ± 5 V, and the blades 221, 222, 223 and the core wire 152 are not in contact with each other. When the voltage level is sufficiently smaller than ± 3V, for example, the threshold values t1 and t2 may be set to voltage levels of −3V and + 3V.

  When high-frequency signals (electrical signals) having voltage levels (-3 V or less or +3 V or more) exceeding the threshold values t1 and t2 are detected at the electrodes 242, 244, the blades 221, 222, 223 and the core wire 152 are in contact with each other. You may judge. In this case, for example, when a voltage level exceeding the thresholds t1 and t2 is detected for a predetermined time (or a predetermined number of times), it may be determined that each blade 221, 222, 223 and the core wire 152 are in contact with each other.

  Thereby, a case where a voltage level exceeding the thresholds t1 and t2 is detected instantaneously can be ignored, and erroneous determination can be prevented. For example, when a voltage level exceeding a predetermined threshold t1, t2 is detected for 1 ms (milliseconds), or when a voltage level exceeding a predetermined threshold t1, t2 is detected 10 times (corresponding to 1 ms at 100 kHz) or more Furthermore, it may be determined that the blades 221, 222, 223 and the core wire 152 are in contact with each other. Moreover, the electric wire processing apparatus 100 may set the area | region which performs this contact determination previously with respect to the operation | movement area | region of each blade 221,222,223. It is preferable to prepare at least one determination area.

≪Detection of `` contact position''≫
The blade position detector 106 can detect the position of a pair of blades moved by the blade driving mechanism 105. For example, in the cutting process or the cutting process, the position (state, opening / closing amount) of each blade 221, 222, 223 at the timing when each blade 221, 222, 223 and the core wire 152 contact each other by the blade position detector 106. Can be detected. In the electric wire processing apparatus 100, the relative positions (distances) of the covered electric wire 150 and the blade 104 along the longitudinal direction of the covered electric wire 150 are detected by the relative position detectors 118F and 118R. For this reason, in the peeling process, the relative position (distance) along the longitudinal direction of the covered electric wire 150 between the covered electric wire 150 and the blade 104 at the timing when the blades 221, 222, 223 and the core wire 152 contact each other is detected. it can.

≪Cut processing≫
Hereinafter, the state determination (defect determination) of the covered electric wire 150 in the cutting process of the covered electric wire 150 by the electric wire processing apparatus 100 will be described.

≪Detection example 1 (cutting process) ≫
FIG. 4 shows an example of the relationship between the position (state, opening / closing amount) of the blade 104 (each blade 221, 222, 223) detected by the blade position detector 106 and the high-frequency signal detected by the signal detector 110. Is shown. In FIG. 4, on the time axis (horizontal axis), the position (state, opening / closing amount) of the blade 104 (each blade 221, 222, 223) detected by the blade position detector 106 is shown. The high-frequency signal (signal waveform W0) input to the signal detector 110 at the timing is shown.

  Here, FIG. 4 shows the relationship between the position (state, opening / closing amount) of the cutting blade 221 and the high-frequency signal detected by the signal detector 110 in the step of cutting the covered electric wire 150 with the cutting blade 221, for example. Show. Here, the waveform of the high-frequency signal is schematically shown. However, in reality, the waveform is a high-frequency waveform of 100 kHz, and a waveform closer to the time axis is generated than shown. Yes.

  In this embodiment, when the cutting blade 221 and the core wire 152 come into contact with each other, the voltage applied to the cutting blade 221 is directly applied to the core wire 152. For this reason, the voltage level induced in the electrode 242 increases. In the process of cutting the covered electric wire 150 by the cutting blade 221, as the cutting blade 221 is closed, the insulator 154 is cut, and then the contact between the cutting blade 221 and the core wire 152 occurs. Then, when the cutting blade 221 is completely closed, the covered electric wire 150 is cut. In FIG. 4, contact between the cutting blade 221 and the core wire 152 is detected in the latter half of the operation of closing the cutting blade 221. FIG. 4 shows a typical waveform pattern when the covered electric wire 150 is normally cut.

≪Section A, B≫
In such a cutting process, for example, a plurality of areas for determining “contact” may be set in advance with respect to a moving region in which the blade 104 (here, the cutting blade 221) moves. For example, in the cutting process, a pair of cutting blades 221a and 221b whose center is recessed are used. In this case, as shown in FIG. 4, the distance between the pair of cutting blades 221a and 221b opened from the pair of cutting blades 221a and 221b (the distance between the pair of cutting blades 221a and 221b recessed in the center) is formed. The moving area of the pair of cutting blades 221a and 221b until the inscribed circle diameter of the space to be a distance corresponding to the outer diameter of the covered electric wire 150 is “A”, and the position (outside of the covered electric wire 150) The moving area from the opposing distance corresponding to the diameter) until the pair of cutting blades 221a and 221b are completely closed is defined as “B”. The setting of such an area can be arbitrarily set by the operator by the first area setting unit 114 described above. In this case, for example, the operator may select the first half moving area “A” where the cutting blade 221 is closed as the first abnormality determination area.

  FIG. 4 is a typical waveform pattern when the covered electric wire 150 is normally cut. In FIG. 4, “contact” is not detected in the first half moving area “A” where the cutting blade 221 is closed, and “contact” is detected in the second half moving area “B” where the cutting blade 221 is closed. Thereby, in the moving area “A” in the first half when the cutting blade 221 is closed, the cutting blade 221 and the core wire 152 are not in contact with each other, and it can be determined that the covered electric wire 150 is appropriately cut. Further, by detecting the presence or absence of “contact” by dividing into areas as described above, it is possible to accurately determine the state of the covered electric wire 150 in the electric wire processing while suppressing the amount of data. That is, the electric wire processing apparatus 100 can perform cutting processing and strip processing once or more per second, and is operated at a high speed. For this reason, it is necessary to perform quality determination of each electric wire process in a short time. In such a case, it is desirable to reduce the amount of data required for pass / fail determination as long as accurate pass / fail determination can be realized.

  Here, although the two areas A and B are set based on the position corresponding to the outer diameter of the covered electric wire 150, the setting of the areas is not necessarily limited to such an embodiment. For example, a plurality of areas may be set at a predetermined interval with respect to the moving region in which the blade 104 moves. In this case, the event can be analyzed in detail by finely setting the area, but the data amount is increased. For this reason, an appropriate number of areas may be set.

≪Detection example 2 (cutting process) ≫
The electric wire processing apparatus 100 performs cutting based on the position (state, opening / closing amount) of the cutting blade 221 detected by the blade position detector 106 and the high-frequency signal (signal waveform W0) detected by the signal detector 110. The state of the covered electric wire 150 in the processing can be detected. FIG. 5 shows the relationship between the position (state, opening / closing amount) of the cutting blade 221 detected by the blade position detector 106 and the high-frequency signal (signal waveform W0) detected by the signal detector 110. In FIG. 5, the voltage level of the electrode 242 is high when the pair of cutting blades 221 are separated (the cutting blade 221 is not sufficiently closed). For this reason, for example, as shown in FIG. 6, there is a possibility that the covered electric wire 150 is cut in a state shifted from the center of the blade with respect to the cutting blade 221 having a depressed center.

≪Detection example 3 (cutting process) ≫
FIG. 7 shows the relationship between the position (state, opening / closing amount) of the cutting blade 221 detected by the blade position detector 106 and the high-frequency signal (signal waveform W0) detected by the signal detector 110 in the cutting process. Show. In FIG. 7, the voltage level of the electrode 242 does not change and does not increase at all the positions of the cutting blade 221 (from the state in which the cutting blade 221 is closed until it is reopened). In an appropriate cutting process, contact is detected at least once. However, in the detection example of FIG. 7, contact between the core wire 152 and the cutting blade 221 has never been detected. For this reason, for example, as shown in FIG. 8, the covered electric wire 150 is arranged out of the cutting area of the cutting blade 221, and the cutting operation may occur in this state, or the signal detector 110 or the core wire wound sensor may be broken. The possibility of such may be considered. When the waveform as shown in FIG. 7 is detected, the wire processing device 100 may be configured such that the wire processing device 100 stops. By stopping the electric wire processing apparatus 100, the operator can investigate the cause of the waveform as shown in FIG.

  Thus, based on the position of the blade 104 detected by the blade position detector 106 and the high-frequency signal (signal waveform W0) detected by the signal detector 110, for example, the cutting blade 221 and the core wire 152 are It is possible to detect how long the contact has occurred at the timing. Thereby, the state of the covered electric wire 150 in the cutting process can be detected more accurately.

≪Strip processing (cutting and peeling) ≫
Next, a detection example in strip processing will be described. Here, the F-side strip process will be described as an example, but the R-side strip process is the same.

  The strip process includes a cutting process and a skinning process. The cutting process is a process of cutting the strip blade 222 into the insulator 154 at the end of the covered electric wire 150. In the peeling process, the strip blade 222 and the covered electric wire 150 are relatively moved along the longitudinal direction of the covered electric wire 150 while the strip blade 222 is cut into the insulator 154, and the insulator 154 is peeled off from the covered electric wire 150. It is processing.

<< Detection Example 4 (Strip Processing) >>
FIG. 9 shows the position (state, opening / closing amount) of the strip blade 222 (see FIG. 1) in the above-described cutting process (the cutting process during the strip process), and the detected waveform (high frequency) detected by the signal detector 110. Signal (signal waveform W0)). FIG. 10 shows a relative position between the covered wire 150 and the strip blade 222 and a detection waveform detected by the signal detector 110 in the above-described stripping process in the strip process. FIG. 9 and FIG. 10 exemplify patterns of detected waveforms when appropriate strip processing is performed.

<Cutting process>
In the cutting process, the strip blade 222 is closed and cut into the insulator 154 of the covered electric wire 150. In this embodiment, the strip blade 222 has a recessed central portion of the blade. In the cutting process, the strip blade 222 is once closed deeply as shown in FIG. At this time, the strip blade 222 is cut into the insulator 154 while leaving the core wire 152 (see FIG. 2) due to the portion where the central portion of the blade is depressed. Next, the strip blade 222 is slightly opened. As a result, the distance between the strip blade 222 and the core wire 152 increases when the strip blade 222 is cut into the insulator 154. Thereby, in the stripping operation in which the strip blade 222 moves along the extending direction of the covered electric wire 150, the core wire 152 is prevented from being damaged by the strip blade 222.

  At this time, if the cutting process is appropriately performed, the strip blade 222 cuts into the insulator 154 of the covered electric wire 150 but does not contact the core wire 152. That is, as shown in FIG. 9, the detection waveform does not increase in the operation of closing the strip blade 222 and cutting into the insulator 154. Strictly speaking, since the thickness of the insulator 154 is changed by the cutting process, the detected waveform may be slightly increased as the degree of electrostatic coupling is changed. However, even in such a case, the detected waveform does not clearly increase as in the case of contact.

  In such a cutting process, for example, a plurality of areas for determining “contact” may be set in advance for the moving region in which the strip blade 222 moves. For example, as shown in FIG. 9, a first-half moving region “C” in which the strip blade 222 is closed and a second-half moving region “D” in which the strip blade 222 is closed and then slightly opened may be set. The setting of such an area can be arbitrarily set by the operator by the first area setting unit 114 described above. In addition, the operator may set an abnormality determination area for the moving area of the strip blades 222 and 223 in the cutting process, and may be set separately from the cutting process.

<Peeling treatment>
In the peeling process, the strip blade 222 and the covered electric wire 150 are relatively moved along the longitudinal direction of the covered electric wire 150 in a state where the strip blade 222 is cut into the insulator 154, and the F side of the covered electric wire 150 is moved. In this process, the insulator 154 is peeled off from the end 150F. When the strip blade 222 is cut into the insulator 154, the distance between the strip blade 222 and the core wire 152 is slightly increased. If the stripping process is properly performed in the most ideal state, the strip blade 222 does not contact the core wire 152 at all. For this reason, as shown in FIG. 10, in the operation of relatively moving the strip blade 222 and the covered electric wire 150 along the longitudinal direction of the covered electric wire 150, the detected waveform does not increase.

  In such a peeling process, for example, a plurality of areas may be set in advance with respect to the relative movement region between the covered electric wire 150 and the strip blade 222. For example, as shown in FIG. 10, a relative movement area “E” in the first half of the skinning process and a relative movement area “F” in the second half of the skinning process may be set. The setting of such an area can be arbitrarily set by the operator by the first area setting unit 114 described above. For example, in the strip process (striping process) by the strip blades 222 and 223, the time from the start of stripping to the end of stripping may be divided in the time domain. For example, an appropriate time from the timing when the strip process (peeling process) is started may be set as the initial area (for example, E area) of the strip process (peeling process), and the subsequent period may be set as the F area. The appropriate time as the initial region from the timing when the strip processing (peeling processing) is started is, for example, 0.1 seconds, 0.2 seconds, 0.3 seconds, 0.5 seconds, etc. Appropriate time can be set according to. Further, the present invention is not limited to this, and the period from the start of peeling to the end of peeling may be further divided into a plurality of time regions. The operator may set the second abnormality determination area for the relative movement region between the covered electric wire 150 and the strip blade 222. In this case, the second abnormality determination area may be configured to be selected by the operator from a plurality of preset areas.

≪Detection example 5 (cutting process) ≫
FIG. 11 exemplifies a detected waveform pattern when the cutting process is performed. In the example shown in FIG. 11, the detection waveform is not large in the first movement region “C” where the strip blade 222 is closed, but the detection waveform is large in the second movement region “D”. This is considered to be because the strip blade 222 contacts the core wire 152 at the end of the cutting process. In such a case, as shown in FIG. 12, the covered electric wire 150 may have a slight flaw 156 on the core wire 152 at the site where the cutting process has been performed. In this case, depending on the application, any scratch on the core wire 152 may be regarded as defective. However, there are applications in which slight scratches on the core wire 152 are allowed. Accordingly, the quality of the covered electric wire 150 is determined by further taking into consideration the time when the detected waveform becomes large (the time when the strip blade 222 contacts the core wire 152) and the presence or absence of “contact” in the subsequent peeling process. Also good. Thereby, a determination process can be constructed so that the quality of the cutting process can be appropriately determined according to the application of the covered electric wire 150.

≪Detection example 6 (cutting process) ≫
FIG. 13 illustrates a pattern of the detected waveform when the cutting process is performed. In the example shown in FIG. 13, the detected waveform increases from the middle of the first half of the moving region “C” where the strip blade 222 closes, and the detected waveform also increases in the second half of the moving region “D”. For this reason, it is considered that in the initial stage of the cutting process, the strip blade 222 contacts the core wire 152, and thereafter, “contact” continues during the cutting process. In this case, as shown in FIG. 14, it is considered that the core wire 152 was deeply damaged in the covered electric wire 150. For example, when the core wire 152 is a stranded wire obtained by combining a plurality of fine wires, there is a possibility that several fine wires are cut as shown in FIG. In this case, it is regarded as defective in almost many applications.

≪Detection example 7 (peeling process) ≫
FIG. 15 shows an example of a detected waveform pattern when the skinning process is performed. In the example shown in FIG. 15, the detection waveform is not large in the relative movement region “E” in the first half of the skinning process, and the detection waveform is large in the relative movement region “F” in the second half of the skinning process. That is, it is considered that the strip blade 222 and the core wire 152 “contacted” when the distance between the strip blade 222 and the covered electric wire 150 is long. From this, as shown in FIG. 16, the core wire 152 is bent at the end of the covered electric wire 150, and the strip blade 222 and the core wire 152 may be in contact with each other when the strip blade 222 passes therethrough. Further, as shown in FIG. 17, at the end of the covered electric wire 150, when the strip blade 222 passes, the strip blade 222 and the core wire 152 may come into contact with each other, and the exposed tip of the core wire 152 may be damaged. .

  In this case, although there are cases where it is considered to be defective in applications that are severe with respect to scratches on the core wire 152, there are also applications in which the treated covered electric wire 150 is allowed as a non-defective product with respect to the tip scratches on the core wire 152. Further, the relative movement area between the strip blade 222 and the covered electric wire 150 may be set in detail, and the pass / fail judgment may be performed in consideration of the position in the relative movement area where the contact has occurred.

≪Detection example 8 (peeling process) ≫
FIG. 18 illustrates a pattern of the detected waveform when the skinning process is performed. In the example shown in FIG. 18, the detected waveform is large in the relative movement region “E” in the first half of the skinning process, and the detected waveform is not large in the relative movement region “F” in the latter half of the skinning process. That is, when the distance between the strip blade 222 and the covered electric wire 150 is short, the strip blade 222 and the core wire 152 are “contacted”, and when the strip blade 222 and the covered electric wire 150 are separated, they are “non-contact”. From this, as shown in FIG. 12, in the cutting process, the strip blade 222 may contact the core wire 152, and then the strip blade 222 and the core wire 152 may not contact each other and the peeling process may be performed. is there. In this case, there is a high possibility that the scratches generated on the core wire 152 are slight, and the treated covered electric wire 150 can be accepted as a good product depending on the application. In this case, the relative movement area between the strip blade 222 and the covered electric wire 150 is set in detail, and the position in the relative movement area between the strip blade 222 and the covered electric wire 150 is finely determined. Judgment may be made to determine pass / fail.

≪Detection example 9 (peeling process) ≫
FIG. 19 shows an example of a detected waveform pattern when the peeling process is performed. In the example shown in FIG. 19, the detected waveform is large in the relative movement area “E” in the first half of the peeling process, and the detected waveform is continuously increased in the relative movement area “F” in the latter half of the subsequent peeling process. Yes. That is, when the distance between the strip blade 222 and the covered electric wire 150 is short, the strip blade 222 and the core wire 152 “contact”, and then, during the peeling process, the strip blade 222 and the covered electric wire 150 continue to “contact”. ". From this, as shown in FIG. 20, in the cutting process, the strip blade 222 comes into contact with the core wire 152, and then the possibility that the stripping process was performed while pulling out the thin wire 152a in the core wire 152 or the exposed core wire 152 was performed. May have been scratched along the entire length. In this case, the scratches generated in the core wire 152 are considered to be large, and in many applications, the treated covered electric wire 150 is an event to be determined as defective.

≪Wire state detection method≫
Thus, this electric wire processing apparatus 100 (electric wire state detection method) has a blade position detection process, a high frequency signal generation process, a signal detection process, and a first electric wire state detection process as described above. .

  Here, the blade position detection process detects the position of the blade 104 moved by the blade drive mechanism 105. In the high frequency signal generation processing, a high frequency signal is generated in the core wire 152 via the insulator 154 of the covered electric wire 150. In the signal detection process, a high frequency signal (electric signal) generated in the core wire 152 is detected. The first electric wire state detection process is based on the position of the blade 104 (in other words, the state and the opening / closing amount) detected by the blade position detection process and the high-frequency signal detected by the signal detection process. A state is detected (for example, detection examples 1 to 6).

  According to the electric wire state detection method of the electric wire processing apparatus 100, the state of the covered electric wire 150 is detected (detected or determined) based on the position (state, opening / closing amount) of the blade 104 and the high-frequency signal generated in the core wire 152. can do. For this reason, the state of the processed covered electric wire 150 can be grasped more appropriately.

  In this case, as described above, a process of detecting “contact” between the core wire 152 of the covered electric wire 150 and the blade 104 may be included based on the magnitude of the high-frequency signal detected by the signal detection process. Moreover, the 1st abnormality determination area may be set in the movement area | region where the blade 104 moves. Such a first abnormality determination area may be set separately for each of the cutting process and the cutting process. For example, a plurality of zones (“A” and “B” in detection examples 1 to 3 relating to cutting processing, “C” and “D” in detection examples 4 to 6 relating to cutting processing) are set in advance.

  In this case, the process of determining whether the position of the blade when “contact” is detected is in the first abnormality determination area may be included. According to the determination process, when “contact” is detected, it is only necessary to determine whether or not the area is a predetermined area among the plurality of areas set in the movement region. It is not necessary to detect the presence or absence of “contact”, and the process of determining the wire process as abnormal can be simplified. Thus, the process which determines an electric wire process as abnormality can be simplified by setting a 1st abnormality determination area in the movement area | region where the blade 104 moves. In addition, by setting a plurality of areas in the moving region where the blade 104 moves and determining contact for each area, the time required for the determination can be shortened.

  Moreover, the process which determines the said electric wire process as abnormality when "contact" is detected in the predetermined 1st abnormality determination area among movement areas may be included. Thereby, for example, as in the above-described detection example 2 (see FIG. 5), when “contact” is detected in a predetermined area A in the first half of the moving region of the cutting blade 221, the electric wire processing is performed. It may be detected as “abnormal”. As described above, when an area is determined in advance in the moving area and “contact” is detected in the predetermined area, the wire processing is detected as “abnormal”, thereby easily and accurately with a small amount of data. The quality of the electric wire processing can be determined.

  Moreover, the process which determines the said electric wire process as abnormality when "contact" is not detected in all the areas set to the movement area | region may be included. For example, in an appropriate cutting process, “contact” is always detected. In such a case, when “contact” is not detected in all the areas set in the movement region, the cutting process can be determined as “abnormal”. Specifically, as in detection example 3 (see FIG. 6) described above, when “contact” is not detected in all the areas set in the moving region of the cutting blade 221, the wire processing is detected as “abnormal”. May be.

  Further, in the electric wire processing, the blade 104 (each blade 221, 222, 223) has a blade shape in which the central portion is recessed, and is configured by a pair of blades arranged so that the recesses face each other. There are many. With such a blade shape, an electric wire can be guided to the recess in the central portion of the blade 104, and the electric wire can be processed in the central portion of the blade 104. Therefore, more stable electric wire processing can be realized. The blade driving mechanism 105 drives the pair of blades 104 so that the pair of blades 104 are closed or opened. In this case, the first abnormality determination area may be set in a region where the distance between the central portions of the pair of blades 104 is larger than the outer diameter of the covered electric wire 150. And when "contact" is detected in the said abnormality determination area, the process which determines the said electric wire process as abnormality may be included.

  In this case, for example, when the center portion has a recessed blade shape, contact is detected in a predetermined area in the first half of the moving region in which the blade 104 advances with respect to the covered electric wire 150. In the case, it is preferable to include a process of determining the wire process as abnormal. Thereby, the case where an electric wire cannot be induced | guided | derived to the hollow of the center part of a blade, and an electric wire was not able to be processed in the center part of the said blade can be detected as "abnormal".

  Further, the wire processing apparatus 100 is configured so that the covered electric wire 150 held by the electric wire holder 102 is separated from the blade 104 (in other words, the electric wire holder 102 holding the covered electric wire 150 and the blade 104 are separated). The covered electric wire drive mechanism 116 </ b> F and 116 </ b> R are provided to relatively move the covered electric wire 150 and the blade 104 along the longitudinal direction of the covered electric wire 150. In this wire processing apparatus, the coated wire 150 and the strip blades 222 and 223 are connected to the insulation 154 of the coated wire 150 held by the wire holder 102 in a state where the strip blades 222 and 223 are bitten. A strip process for stripping the insulator 154 can be performed by relatively moving along the longitudinal direction of the electric wire 150. The electric wire state detection method includes the relative position (distance) between the covered electric wire 150 and the strip blades 222 and 223 that are moved by the covered electric wire driving mechanisms 116F and 116R in the strip processing, and the electric current detected by the signal detection processing. A second electric wire state detection process for detecting the state of the covered electric wire 150 based on the signal (the high frequency signal generated in the core wire 152) may be included.

  In this case, a second abnormality determination area may be set for the relative movement area between the covered electric wire 150 and the strip blade 222. For example, a plurality of areas may be set in advance with respect to the relative movement region between the covered electric wire 150 and the strip blade 222 (for example, detection examples 7 to 9 “E” and “F”). At this time, the second abnormality determination area may be configured to be selected by the operator from the plurality of areas. As described above, the defect determination can be simplified by setting the second abnormality determination area for the relative movement region between the covered electric wire 150 and the strip blade 222.

≪Wire processing apparatus 100A≫
In this embodiment, a high frequency voltage is applied to the blade 104, and the electrodes 242, 244 are separately brought close to the covered electric wire 150 (core wire 152). FIG. 21 shows an electric wire processing apparatus 100A according to another embodiment. In the embodiment shown in FIG. 21, a high-frequency voltage is applied to the electrodes 242 and 244 adjacent to the covered electric wire 150 (core wire 152) and is received by the F-side and R-side strip blades 222 and 223. In this case, the F-side blade 222 and the R-side blade 223 are preferably insulated from each other on the receiving side. The cutting blade 221 may have the F-side blade 222 and the R-side blade 223 as separate systems, or may be electrically connected to either the F-side blade 222 or the R-side blade 223. Good. In the illustrated example, the cutting blade 221 and the F-side strip blade 222 are electrically connected, but the cutting blade 221 and the R-side strip blade 223 are insulated.

  FIG. 22 shows a circuit diagram (equivalent circuit diagram) for detecting a high-frequency signal (electric signal) generated in the core wire 152 for the wire processing apparatus 100A. In this embodiment, the high frequency power supply 240 applies a high frequency voltage controlled to a constant voltage to the electrode 242. In the circuit diagram shown in FIG. 22, the capacitance C <b> 1 indicates the space capacitance between the blade 104 and the electrode 242. A capacitance C <b> 2 indicates the capacitance between the core wire 152 and the electrode 242. The switch S <b> 1 represents the operation of the blade 104 with respect to the insulator 154 of the covered electric wire 150. That is, when the switch S1 is open, the insulator 154 is interposed between the blade 104 and the core wire 152, indicating that the blade 104 and the core wire 152 are not in contact with each other. Further, when the switch S1 is closed, the blade 104 and the core wire 152 are in contact with each other. In FIG. 22, a part indicated by “G” indicates a part electrically connected to the mechanical ground (reference potential).

  When the blade 104 (the cutting blade 221 or the strip blade 222) and the core wire 152 come into contact with each other, the switch S1 is closed in FIG. 22, and the voltage level generated in the blade 104 varies greatly. In this embodiment, the signal detector 110 can detect contact / non-contact between the blade 104 and the core wire 152 based on the voltage level generated in the blade 104.

  In the configuration using such a constant voltage power supply 240 (FIG. 1 (FIG. 3) and FIG. 21 (FIG. 22)), the combined impedance of the blade 104 and the electrodes 242 and 244 changes due to the contact between the blade 104 and the core wire 152. For this reason, the voltage level detected by the signal detector 110 increases. In this case, the F-side and R-side circuits can be arranged in parallel, and can be configured with one constant voltage source as shown in FIGS. The high frequency power supply is not limited to the constant voltage power supply 240, and a constant current power supply may be used. Below, the case where a constant current power supply is used is illustrated. Here, the “constant current power supply” is a power supply set so as to keep the output current at a constant set value even when the load fluctuates.

≪Wire processing device 100B≫
FIG. 23 shows an electric wire processing apparatus 100B according to still another embodiment. In this embodiment, a high-frequency constant current power supply 240B controlled to a constant current is used as the high-frequency power supply. In the embodiment shown in FIG. 23, a high frequency voltage is applied to the blade 104. In this case, in the configuration of the blade 104 to which a high-frequency voltage is input, the F-side blade 222 and the R-side blade 223 are preferably insulated. Further, the cutting blade 221 may be a separate system from the F-side blade 222 and the R-side blade 223, or is electrically connected to either the F-side blade 222 or the R-side blade 223. Also good. In the illustrated example, the cutting blade 221 and the F-side strip blade 222 are electrically connected, but the cutting blade 221 and the R-side strip blade 223 are insulated.

  FIG. 24 shows a circuit diagram (equivalent circuit diagram) for detecting a high-frequency signal (electric signal) generated in the core wire 152 for the electric wire processing apparatus 100B. In FIG. 24, a part indicated by “G” indicates a part electrically connected to the mechanical ground (reference potential). In the circuit diagram shown in FIG. 24, the capacitance C1 indicates the space capacitance between the blade 104 and the mechanical ground G (reference potential). A capacitance C2 indicates the capacitance between the core wire 152 and the mechanical ground G (reference potential). The switch S <b> 1 represents the operation of the blade 104 with respect to the insulator 154 of the covered electric wire 150. That is, when the switch S1 is open, the insulator 154 is interposed between the blade 104 and the core wire 152, indicating that the blade 104 and the core wire 152 are not in contact with each other. Further, when the switch S1 is closed, the blade 104 and the core wire 152 are in contact with each other.

  In this case, when the blade 104 and the core wire 152 come into contact with each other (when the switch S1 is closed), the combined impedance between the blade 104 and the mechanical ground G (reference potential) changes. For this reason, the voltage level detected by the signal detector 110 decreases. FIG. 25 shows the relationship between the position of the strip blade 222 and the detected waveform for the wire processing apparatus 100B of FIG. As shown in FIG. 25, in this electric wire processing apparatus 100B, the high frequency voltage applied to the blade 104 is input to the signal detector 110 as an input signal (electric signal) to the signal detector 110. That is, when the blade 104 and the core wire 152 are not in contact with each other, the voltage level detected by the signal detector 110 is high. On the other hand, when the blade 104 and the core wire 152 are in contact with each other, the voltage level detected by the signal detector 110 is significantly reduced. For this reason, for example, by setting the thresholds t1 and t2 between the voltage level at the time of non-contact and the voltage level at the time of contact, the contact / non-contact between the blade 104 and the core wire 152 can be detected.

≪Wire processing device 100C≫
FIG. 26 shows an electric wire processing apparatus 100C according to still another embodiment. In this embodiment, a high-frequency constant current power supply 240B controlled to a constant current is used as the high-frequency power supply. This point is common to the wire processing apparatus 100B shown in FIG. In the embodiment shown in FIG. 26, the electrodes 242 and 244 are provided so as to be close to the core wire 152 through the insulator 154. The high frequency constant current power supply 240 </ b> B applies a high frequency voltage to the electrodes 242 and 244. In this case, in the configuration of the blade 104 to which a high-frequency voltage is input, the F-side blade 222 and the R-side blade 223 do not necessarily have to be insulated.

  FIG. 27 shows a circuit diagram (equivalent circuit diagram) on the F side for detecting a high-frequency signal (electric signal) generated in the core wire 152 in the wire processing apparatus 100C. In FIG. 27, the part indicated by “G” indicates a part electrically connected to the mechanical ground (reference potential). In the circuit diagram shown in FIG. 27, a capacitance C1 indicates a space capacitance between the F-side electrode 242 and the blade 104 (mechanical ground G (reference potential)). A capacitance C <b> 2 indicates the capacitance between the F-side electrode 242 and the core wire 152. The switch S <b> 1 represents the operation of the blade 104 with respect to the insulator 154 of the covered electric wire 150. That is, when the switch S1 is open, the insulator 154 is interposed between the blade 104 and the core wire 152, indicating that the blade 104 and the core wire 152 are not in contact with each other. When the switch S1 is closed, it indicates that the blade 104 and the core wire 152 are in contact with each other.

  In this case, when the blade 104 and the core wire 152 come into contact (when the switch S1 is closed), the core wire 152 and the blade 104 (mechanical ground G (reference potential)) are electrically connected. Therefore, the combined impedance between the electrode 242 and the mechanical ground G (reference potential) changes. At this time, the voltage level detected by the signal detector 110 decreases. Thus, the high frequency voltage applied to the electrode 242 varies with the change of the high frequency signal of the core wire 152. Here, the high frequency voltage applied to the electrode 242 is input to the signal detector 110 as an input signal (electric signal) to the signal detector 110. That is, in this embodiment, when the blade 104 and the core wire 152 are not in contact with each other, the voltage level detected by the signal detector 110 is high. On the other hand, when the blade 104 and the core wire 152 are in contact with each other, the voltage level detected by the signal detector 110 is significantly reduced. For this reason, for example, by setting the thresholds t1 and t2 between the voltage level at the time of non-contact and the voltage level at the time of contact, the contact / non-contact between the blade 104 and the core wire 152 can be detected. In this respect, a detection waveform similar to that in FIG. 25 is obtained.

  As described above, the electric wire processing apparatus 100 detects the state of the covered electric wire 150 based on the position of the blade 104 detected by the blade position detection process and the electrical signal detected by the signal detection process. An electric wire state detector 112 (first electric wire state detection process) is provided.

  The wire processing apparatus 100 is configured to connect the coated wire 150 and the strip blades 222 and 223 to the insulator 154 of the coated wire 150 held by the wire holder 102 while the strip blades 222 and 223 are bitten. A strip process for stripping the insulator 154 may be performed with relative movement along the longitudinal direction. This electric wire processing apparatus 100 is based on the relative positions of the covered electric wire 150 and the strip blades 222 and 223, which are moved by the covered electric wire driving mechanisms 116F and 116R, and the electric signal detected by the signal detection processing. Second electric wire state detectors 120F and 120R for detecting the state of the electric wire 150 are included.

  In this case, the wire processing apparatus 100 not only simply changes the electrical signal associated with the contact between the blade and the core wire 152 in the cutting processing or strip processing of the covered wire 150 but also the positions (states) of the blades 221, 222, and 223 , The opening / closing amount) and the relative position (distance) between the covered electric wire 150 and each strip blade 222, 223 are further detected. For this reason, the electric wire processing apparatus 100 is more flexible and can perform defect determination with higher accuracy in electric wire processing. Moreover, since the electric wire processing apparatus 100 can perform a more flexible determination, it can perform the appropriate determination according to a use by adjusting appropriately.

≪Pass / fail judgment processing flow≫
FIG. 29 and FIG. 30 show an example of the processing flow of the electric wire processing including the quality determination of the cutting processing and strip processing (cutting processing and peeling processing) described above. As shown in FIG. 29, the processing flow is as follows: S1: area setting (cutting), S2: area setting (cutting), S3: area setting (peeling), S4: end condition setting, S5: cutting process, S6 : Cutting process, S7: skinning process, S8: pass / fail judgment process, S9: end condition judgment. Hereinafter, each processing will be described.

<S1: Zone setting (cutting)>
In the area setting (S1) for the cutting process, an area for determining abnormality is set for the moving region in which the cutting blade 221 moves in order to determine whether the cutting process is good or bad. For example, in the cutting process, an area A and an area B as shown in FIGS. 4, 5, and 7 may be set. Such area setting is not limited to the illustrated example. The operator arbitrarily sets a plurality of zones in consideration of specifications such as the diameter of the covered electric wire 150 to be processed and the diameter of the core wire 152 (see FIG. 2), the shape of the cutting blade 221 and the processing speed. can do. Note that the operator may set only the abnormality determination area (for example, only area A) for the moving area in which the cutting blade 221 moves. A plurality of abnormality determination areas may be provided. Further, the electric wire processing apparatus 100 may be configured such that a plurality of areas are set in advance with respect to the moving area in which the cutting blade 221 moves, and the operator selects an abnormality determination area from the plurality of areas. Good.

<S2: Area setting (cutting)>
In the area setting (S2) for the cutting process, an area for determining an abnormality is set for the moving region in which the strip blades 222 and 223 move in order to perform pass / fail determination for the cutting process. For example, in the cutting process, a zone C or a zone D as shown in FIGS. 9, 11, and 13 may be set. Such area setting is not limited to the illustrated example. The operator can arbitrarily select a plurality of areas in consideration of specifications such as the diameter of the covered wire 150 to be processed and the diameter of the core wire 152 (see FIG. 2), the shape of the strip blades 222 and 223, the processing speed, and the like. Can be set. Note that the operator may set only the abnormality determination area (for example, only area C) for the moving area in which the strip blades 222 and 223 move. A plurality of abnormality determination areas may be provided. The electric wire processing apparatus 100 is configured such that a plurality of areas are set in advance for the moving area in which the strip blades 222 and 223 move, and the operator selects an abnormality determination area from the plurality of areas. May be.

<S3: Area setting (peeling)>
In the area setting (S3) for the skinning process, an area for determining an abnormality is set for the relative movement region between the covered electric wire 150 and the strip blades 222 and 223 in order to determine whether the skinning process is good or bad. For example, in the peeling process, an area E and an area F as shown in FIGS. 10, 15, 18, and 19 may be set. Such area setting is not limited to the illustrated example. The operator can arbitrarily select a plurality of areas in consideration of specifications such as the diameter of the covered wire 150 to be processed and the diameter of the core wire 152 (see FIG. 2), the shape of the strip blades 222 and 223, the processing speed, and the like. Can be set. Note that the operator may set only the abnormality determination area for the relative movement area between the covered electric wire 150 and the strip blades 222 and 223. A plurality of abnormality determination areas may be provided. In addition, the wire processing apparatus 100 sets a plurality of regions in advance for the relative movement region between the covered wire 150 and the strip blades 222 and 223, and the operator selects an abnormality determination area from the plurality of regions. You may comprise.

<S4: End condition setting>
In this example, an end condition is set for the wire processing. As for the end condition, for the covered electric wire 150, for example, when the process ends according to the number of processes, the number of processes to be ended may be set. The end condition may be configured so that the operator can arbitrarily set a predetermined condition. In this example, from the zone setting to the end condition setting (S1 to S4) is a preprocessing for starting a continuous cutting process on the covered electric wire 150.

<S5: Cutting process to S7: Peeling process>
Next, a cutting process (S5), a cutting process (S6), and a peeling process (S7) are performed in order. That is, the covered electric wire 150 is fed by a predetermined amount and subjected to cutting processing (S5), and strip processing (cutting processing S6 and skinning processing S7) of the F-side end portion 150F and the R-side end portion 150R is performed. It is.

<S8: Pass / Fail Judgment Processing>
In the pass / fail determination process (S8), the pass / fail determination of the covered electric wire 150 that has undergone a series of processes of the cutting process (S5), the cutting process (S6), and the peeling process (S7) is performed. For example, as shown in FIG. 30, the quality determination of the cutting process (S21), the quality determination of the cutting process (S22), and the quality determination of the peeling process (S23) are performed. When all the pass / fail judgments (S21 to S23) are normal, the processed covered electric wire 150 is treated as “non-defective” when “Y”. When abnormality is detected in each pass / fail judgment (S21 to S23), when “N” is detected, the processed covered electric wire 150 is set as “defective”, for example, processing (S24) for moving the processed electric wire to a defective product tray or an operator Notification processing (for example, lighting of an alarm lamp or transmission of an alarm sound) is performed.

<S9. End condition judgment>
In the end condition determination (S9), it is determined whether the end condition set in S4 is met. If the end condition is met, “Y” ends the wire processing. When the termination condition is not met, the above-described cutting process (S5) to skinning process (S7) are repeated continuously in “N”.

  The electric wire state detection method of the electric wire processing apparatus proposed here and various electric wire processing apparatuses that can embody the method have been described above. The electric wire state detection method and electric wire processing apparatus of the electric wire processing apparatus according to the present invention are not limited to any of the above-described embodiments.

100, 100A, 100B, 100C Electric wire processing device 102 Electric wire holder 104 Blade 105 Blade drive mechanism 106 Blade position detector 108 High-frequency signal generator 110 Signal detector 112 First electric wire state detector 114 First zone setting section 116F, 116R Covered wire drive mechanism 118F, 118R Relative position detector 120F, 120R Second wire state detector 122 Second zone setting section 150 Covered wire 150F F side end (tip) of the covered wire
150R R side end of the insulated wire (rear end)
152 Core wire 152a Core wire thin wire 154 Insulator 156 Scratch 201 F side nozzle 202 R side grip portion 204 Wire feed mechanism 206 Wire drawing machine 221 Pair of cutting blades 221a, 221b Cutting blade 222, 223 Pair of strip blades 222a, 223a Strip blade 222b, 223b Strip blades 231, 232 Blade mounting portion 233 Drive mechanism 234 Actuator 235 Encoder (blade position detector)
240 constant voltage power supply (high frequency power supply)
240B constant current power supply (high frequency power supply)
242, 244 Electrodes 248F, 248R Signal converters 252F, 252R Moving mechanism 254F, 254R Actuator 256F, 256R Encoder (Relative position detector)
t1, t2 Threshold G Machine ground

≪Detection example 2 (cutting process) ≫
The electric wire processing apparatus 100 performs cutting based on the position (state, opening / closing amount) of the cutting blade 221 detected by the blade position detector 106 and the high-frequency signal (signal waveform W0) detected by the signal detector 110. The state of the covered electric wire 150 in the processing can be detected. FIG. 5 shows the relationship between the position (state, opening / closing amount) of the cutting blade 221 detected by the blade position detector 106 and the high-frequency signal (signal waveform W0) detected by the signal detector 110. In FIG. 5, the voltage level of the electrode 242 is high in a state where the pair of cutting blades 221a and 221b are separated (the cutting blade 221 is not sufficiently closed). For this reason, for example, as shown in FIG. 6, there is a possibility that the covered electric wire 150 is cut in a state shifted from the center of the blade with respect to the cutting blade 221 having a depressed center.

Moreover, the process which determines the said electric wire process as abnormality when "contact" is not detected in all the areas set to the movement area | region may be included. For example, in an appropriate cutting process, “contact” is always detected. In such a case, when “contact” is not detected in all the areas set in the movement region, the cutting process can be determined as “abnormal”. Specifically, as in detection example 3 (see FIG. 7 ) described above, when “contact” is not detected in all the areas set in the moving region of the cutting blade 221, the wire processing is detected as “abnormal”. May be.

In the configuration using such a constant voltage power supply 240 (FIG. 1 (FIG. 3) and FIG. 21 (FIG. 22)), the combined impedance of the blade 104 and the electrodes 242 and 244 changes due to the contact between the blade 104 and the core wire 152. For this reason, the voltage level detected by the signal detector 110 increases. Further, in this case, the F-side and R-side circuits can be arranged in parallel, and can be configured with one constant voltage source as shown in FIGS . 1 and 3 and FIGS. 21 and 22 . The high frequency power supply is not limited to the constant voltage power supply 240, and a constant current power supply may be used. Below, the case where a constant current power supply is used is illustrated. Here, the “constant current power supply” is a power supply set so as to keep the output current at a constant set value even when the load fluctuates.

In this case, when the blade 104 and the core wire 152 come into contact with each other (when the switch S1 is closed), the combined impedance between the blade 104 and the mechanical ground G (reference potential) changes. For this reason, the voltage level detected by the signal detector 110 decreases. FIG. 25 shows the relationship between the position of the strip blade 222 and the detected waveform for the wire processing apparatus 100B of FIG. As shown in FIGS. 24 and 25 , in the electric wire processing apparatus 100B, a high frequency voltage applied to the blade 104 is input to the signal detector 110 as an input signal (electric signal) to the signal detector 110. That is, when the blade 104 and the core wire 152 are not in contact with each other, the voltage level detected by the signal detector 110 is high. On the other hand, when the blade 104 and the core wire 152 are in contact with each other, the voltage level detected by the signal detector 110 is significantly reduced. For this reason, for example, by setting the thresholds t1 and t2 between the voltage level at the time of non-contact and the voltage level at the time of contact, the contact / non-contact between the blade 104 and the core wire 152 can be detected.

Claims (20)

An electric wire holder capable of holding a covered electric wire comprising a core wire and an insulator covering the core wire;
A blade disposed so as to be movable back and forth with respect to the covered electric wire held by the electric wire holder;
A blade drive mechanism for moving the blade;
With regard to an electric wire processing apparatus equipped with
A high-frequency signal generation process for generating a high-frequency signal in the core wire through the insulator;
Blade position detection processing for detecting the position of the blade moved by the blade drive mechanism;
A signal detection process for detecting a high-frequency signal generated in the core wire;
Wire processing including a first wire state detection process for detecting a state of the covered wire based on the blade position detected by the blade position detection processing and the high-frequency signal detected by the signal detection processing. A method for detecting the electric wire state of a device.   The electric wire state of the electric wire processing apparatus according to claim 1, including a process of detecting contact between the core wire of the covered electric wire and the blade based on the magnitude of the high-frequency signal detected by the signal detection process. Detection method.   The electric wire state detection method of the electric wire processing apparatus according to claim 2, wherein a first abnormality determination area is set in advance in a moving region in which the blade moves.   The electric wire state detection method of the electric wire processing apparatus according to claim 3, wherein a plurality of areas are set in a moving region in which the blade moves, and the first abnormality determination area is selected from the plurality of areas.   The electric wire state detection method of the electric wire processing apparatus according to claim 4, further comprising: determining that the electric wire processing is abnormal when the contact is not detected in all the areas set in the moving region.   The electric wire processing apparatus according to any one of claims 3 to 5, including a process of determining whether or not a position of the blade when the contact is detected is the first abnormality determination area. Electric wire state detection method.   The electric wire state of the electric wire processing apparatus according to any one of claims 3 to 6, including a process of determining the electric wire processing as abnormal when the contact is detected in the first abnormality determination area. Detection method. The blade has a blade shape having a depression in the center, and is composed of a pair of blades arranged to face the depression.
The blade driving mechanism is a mechanism for driving the pair of blades so that the pair of blades are closed or opened.
The first abnormality determination area is set in a region where an interval between the center portions of the pair of blades is larger than an outer diameter of the covered electric wire,
The electric wire state of the electric wire processing apparatus according to any one of claims 3 to 7, including a process of determining that the electric wire processing is abnormal when the contact is detected in the first abnormality determination area. Detection method. The wire processing device
A covered electric wire driving mechanism for moving the covered electric wire and the blade relatively along the longitudinal direction of the covered electric wire so that the covered electric wire held by the electric wire holder is separated from the blade;
In the state where the blade is bitten into the insulator of the covered electric wire held by the electric wire holder, the covered electric wire and the blade are relatively moved along the longitudinal direction of the covered electric wire, A strip process for stripping the insulator can be performed,
The wire state detection method is:
In the strip process, the state of the covered electric wire is determined based on the relative position between the covered electric wire and the blade, which is moved by the covered electric wire drive mechanism, and the high-frequency signal detected by the signal detection process. The electric wire state detection method of the electric wire processing apparatus described in any one of Claim 1 to 8 including the 2nd electric wire state detection process to detect.   The electric wire state detection method of the electric wire processing apparatus according to claim 9, wherein a second abnormality determination area is set with respect to a relative movement region between the covered electric wire and the blade.   The electric wire processing apparatus according to claim 10, wherein a plurality of areas are set in a relative movement region between the covered electric wire and the blade, and the second abnormality determination area is selected from the plurality of areas. Electric wire state detection method. An electric wire holder capable of holding a covered electric wire comprising a core wire and an insulator covering the core wire;
A blade disposed so as to be movable back and forth with respect to the covered electric wire held by the electric wire holder;
A blade drive mechanism for moving the blade;
A high-frequency signal generator for generating a high-frequency signal in the core wire through the insulator;
A blade position detector for detecting the position of the blade moved by the blade drive mechanism;
A signal detector for detecting a high-frequency signal generated in the core wire;
Electric wire processing including a first electric wire state detector that detects the state of the covered electric wire based on the position of the blade detected by the blade position detector and the high frequency signal detected by the signal detector. apparatus.   The electric wire processing apparatus according to claim 12, further comprising a first area setting unit that sets a first abnormality determination area with respect to a moving region in which the blade moves. A covered electric wire driving mechanism that relatively moves the covered electric wire and the blade along the longitudinal direction of the covered electric wire so that the covered electric wire held by the electric wire holder is separated from the blade;
A relative position detector for detecting a relative position of the covered wire and the blade, which is moved by the covered wire drive mechanism;
The electric wire processing apparatus according to claim 12 or 13, comprising:   A second state for detecting a state of the covered electric wire based on a relative position between the covered electric wire and the blade detected by the relative position detector and the high-frequency signal detected by the signal detector; The electric wire processing apparatus of Claim 14 provided with the electric wire state detector.   The electric wire processing apparatus according to claim 14 or 15, further comprising a second area setting unit that sets a second abnormality determination area with respect to a relative movement region between the covered electric wire and the blade.   The high-frequency signal generator includes an electrode facing the core member through the insulator of the covered electric wire, and a high-frequency power source electrically connected to the electrode. The electric wire processing apparatus described in any one item.   The said high frequency signal generator is an electric wire processing apparatus as described in any one of Claim 12-16 provided with the high frequency power supply electrically connected to the said blade.   The electric wire processing apparatus according to claim 17 or 18, wherein the high-frequency power source is a constant voltage power source.   The electric wire processing apparatus according to claim 17 or 18, wherein the high-frequency power source is a constant current power source.

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