JPWO2014010065A1 - Electric wire processing equipment - Google Patents

Abstract

The core wire contact detection devices 200F and 200R are electrodes 108 facing the core wire 152 of the covered electric wire 150 via the insulator 154 of the covered electric wire 150, and constant current type high frequency signal generators that output a high frequency signal to the electrode 108. 104F and 104R. When the blade 102 and the core wire 152 are in contact with each other, the voltage level of the high-frequency signal output from the high-frequency signal generators 104F and 104R to the electrode 108 is lowered.

Description

  The present invention relates to an electric wire processing apparatus.

  As an electric wire processing device, for example, Japanese Patent Application Laid-Open No. 59-222010 relates to an abnormality detection device for a wire strip machine, and an electrode that is capacitively coupled to a wire is provided to detect a change in current associated with the contact between the core of the wire and the cutter. Thus, a method for detecting an abnormality in strip processing is disclosed. 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 blade is in contact with the core wire. It is described that each temporal component of the contact time is managed.

JP 59-222010 Japanese Patent No. 4883821

  As described above, various proposals have been made to electrically detect the contact between the core wire and the blade and to determine whether or not the core wire is damaged by a process of stripping the covering material from the coated electric wire (strip process) or the like. Here, the new structure which can detect appropriately that the blade and the core wire contacted is proposed about the wire processing apparatus and the core wire contact detection apparatus of the wire processing apparatus.

  A core wire contact detection device according to an embodiment of the present invention includes a blade, an electrode, a constant current type high-frequency signal generator, and a core wire contact detection unit. Here, the electrode is opposed to the core wire through the insulator with respect to the covered electric wire in which the core wire is covered with the insulator. The high frequency signal generator is a constant current type high frequency signal generator that outputs a high frequency signal to an electrode. A core wire contact detection part is a detection part which can detect that the blade and the core wire contacted based on the high frequency signal output from the high frequency signal generator. According to this core wire contact detection device, it is possible to appropriately detect that the blade and the core wire are in contact with each other.

  In this core wire contact detection device, the blade may be grounded. Since the blade may be grounded, the blade mounting structure is simple.

  The core wire contact detection unit is configured to detect contact between the blade and the core wire when the voltage level of the high-frequency signal output from the high-frequency signal generator is lower than a predetermined voltage level. it can.

  Further, when the core wire can contact other conductors except the blade, the other conductors may be insulated. Further, when the core wire can contact other conductors except the blade, the other conductors may be grounded via a resistor. Here, the resistor has a high frequency signal generating device when the voltage level of the high frequency signal output from the high frequency signal generating device is in contact with the blade and the core wire while the core wire and the conductor are in contact with each other. It may have an electrical resistance value that is higher than the voltage level of the high-frequency signal output from.

  The electric wire processing apparatus includes a cutting blade for cutting the covered electric wire, a strip blade for stripping the end of the covered electric wire cut by the cutting blade, and at least one of the cutting blade and the strip blade. A core wire contact detection device as the blade is provided. It becomes possible to detect the contact between the blade and the core wire in the cutting process or the strip process.

  Further, the wire processing apparatus includes a cutting blade for cutting the coated electric wire, an F-side strip blade for stripping the front end portion of the coated electric wire cut by the cutting blade, and a rear end portion of the coated electric wire cut by the cutting blade. An R side strip blade for strip processing may be provided. In this case, it is preferable to include an F-side core contact detection device using the F-side strip blade as the blade and an R-side core contact detection device using the R-side strip blade as the blade.

  Furthermore, you may provide the core wire contact detection apparatus at the time of cutting | disconnection which makes a cutting blade the said blade. In this case, at least one of the F-side core wire contact detection device and the R-side core wire contact detection device can be configured as the core wire contact detection device at the time of cutting.

  Moreover, the core wire contact detection apparatus may be provided with the blade, the electric wire holder, the constant current type high-frequency signal generation device, and the core wire contact detection unit as another form. Here, the electric wire holder is a device that holds a covered electric wire whose core wire is covered with an insulator. The high frequency signal generator is a constant current type high frequency signal generator that outputs a high frequency signal to the blade. The core wire contact detection unit is a detection unit that can detect that the blade and the core wire are in contact based on the high frequency signal output from the high frequency signal generator.

  Further, the wire processing apparatus includes a cutting blade for cutting the coated electric wire, an F-side strip blade for stripping the front end portion of the coated electric wire cut by the cutting blade, and a rear end portion of the coated electric wire cut by the cutting blade. And an R-side strip blade for strip processing. The electric wire processing apparatus includes an F-side core wire contact detection device using the F-side strip blade as the blade, and an R-side core wire contact detection device using the R-side strip blade as the blade. Good.

  Furthermore, you may provide the core wire contact detection apparatus at the time of cutting | disconnection which makes a cutting blade the said blade. In this case, at least one of the F-side core wire contact detection device and the R-side core wire contact detection device may be configured to be a core wire contact detection device at the time of cutting.

  In the above-described electric wire processing apparatus, the high-frequency signal generator of the F-side core contact detection device and the high-frequency signal generator of the R-side core contact detection device are configured to transmit high-frequency signals having different frequencies. May be.

FIG. 1 is a diagram illustrating a configuration example of an electric wire processing apparatus according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a covered electric wire. FIG. 3 is a schematic diagram of the F-side nozzle. FIG. 4 is a plan view of an electric wire processing apparatus according to an embodiment of the present invention. FIG. 5 is a plan view of an electric wire processing apparatus according to an embodiment of the present invention. FIG. 6 shows an equivalent circuit diagram of the wire processing apparatus according to the embodiment of the present invention. FIG. 7 shows the high-frequency signal A output from the high-frequency signal generator when the blade and the core wire are not in contact with each other in the electric wire processing apparatus of FIG. FIG. 8 shows the high-frequency signal A output from the high-frequency signal generator when the blade and the core wire are in contact with each other in the electric wire processing apparatus of FIG. FIG. 9 shows an equivalent circuit diagram of the wire processing device in a state where the core wire of the covered wire being processed is grounded (ground fault). FIG. 10: has shown the equivalent circuit schematic of an electric wire processing apparatus about the state which the core wire of the covered electric wire in process earth | grounded (ground fault) via the resistor. FIG. 11 is a diagram illustrating a configuration example of an electric wire processing apparatus according to another embodiment. 12 is an equivalent circuit diagram of the wire processing apparatus shown in FIG. FIG. 13 shows a high-frequency signal A output from the high-frequency signal generator when the blade and the core wire are in contact with each other in the state where the core wire is grounded (ground fault) in the electric wire processing apparatus of FIG.

  Hereinafter, an electric wire processing device and a core wire contact detection device of the electric wire processing device according to an embodiment of the present invention will be described. 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 an electric wire processing apparatus 100 according to an embodiment of the present invention. As shown in FIG. 1, the electric wire processing apparatus 100 includes a blade 102, high-frequency signal generators 104 </ b> F and 104 </ b> R, an electric wire holder 106, an electrode 108, and a core wire contact detection unit 110. The electric wire processing apparatus 100 performs a cutting process and a strip process for the covered electric wire 150. The electric wire processing apparatus 100 includes core wire contact detection devices 200F and 200R that detect contact between the blade 102 and the core wire 152 (see FIG. 2). Here, the high-frequency signal generation devices 104F and 104R, the electric wire holder 106, the electrode 108, the core wire contact detection unit 110, and the like have functions as elements of the core wire contact detection devices 200F and 200R, respectively.

≪Coated wire 150≫
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.

≪Blade 102≫
In this embodiment, the blade 102 is provided with three blades of a cutting blade 221, an F-side strip blade 222, and an R-side strip blade 223, as shown in FIG. In this embodiment, the cutting blade 221, the F-side strip blade 222, and the R-side strip blade 223 are each composed of a pair of blades having a blade shape in which the center is recessed. The cutting blade 221 is a blade that cuts the covered electric wire 150 by a cutting process. The strip blade 222 on the F side is a blade that strips the front end portion 150F (F side) of the coated electric wire 150 that is sent out of both ends of the cut coated electric wire 150. The R-side strip blade 223 is a blade for stripping the rear end portion 150R (R side) of the fed covered wire 150 out of both ends of the cut covered wire 150.

  In this embodiment, the cutting blade 221, the F-side strip blade 222, and the R-side strip blade 223 are a pair of blades of an upper blade 221a, 222a, 223a and a lower blade 221b, 222b, 223b, respectively. It consists of Each blade 221, 222, 223 is attached to the blade drive mechanism 103 so as to move forward and backward with respect to the covered electric wire 150 held by the electric wire holder 106.

≪Blade drive mechanism 103≫
The blade drive mechanism 103 is a mechanism that moves the blade 102. The blade drive mechanism 103 includes upper and lower blade mounting portions 231 and 232, a drive mechanism 233, and an actuator 234. The upper blades 221 a, 222 a, and 223 a of the cutting blade 221, the F-side strip blade 222, and the R-side strip blade 223 are respectively attached to the upper blade attachment portion 231. The lower blades 221b, 221b, and 223b are attached to the lower blade attachment portion 232, respectively. In this embodiment, the cutting blade 221 and the strip blades 222 and 223 have the strip blade 222 (F side) and the strip blade 223 (R side) arranged side by side with the cutting blade 221 in between.

  In this embodiment, the cutting blade 221 and the F-side and R-side strip blades 222 and 223 are configured to move together, but the cutting blade 221 and the F-side and R-side strip blades 222 are configured to move together. 223 may be configured to be driven independently of each other. In this embodiment, each blade 221, 222, 223 is preferably grounded.

  The drive mechanism 233 is a mechanism that opens and closes and drives the pair of upper and lower blades 221a to 223a and 221b to 223b attached to the blade attachment portions 231 and 232. The drive mechanism 233 is configured by a mechanism using a ball screw, for example. The actuator 234 is a drive device that drives the blades 221, 222, and 223 by the blade drive mechanism 103. The actuator 234 can be constituted by a servo motor, for example.

≪Wire retainer 106≫
Next, the electric wire holder 106 is an apparatus for holding the covered electric wire 150 as shown in FIG. In this embodiment, the electric wire holder 106 includes an F-side nozzle 201 (F-side electric wire holder: see FIG. 3) and an R-side grip 202 (R-side electric wire holder: see FIG. 4). In this embodiment, the covered electric wire 150 is inserted in the order of the wire drawing machine 206, the electric wire feeding mechanism 204, the F-side nozzle 201, and the R-side grip portion 202. The blade 102 (each blade 221, 222, 223) described above is disposed between the F-side nozzle 201 and the R-side grip 202.

≪Wire feeding mechanism 204, wire drawing machine 206≫
Here, the wire drawing machine 206 is a device that removes curl from the covered electric wire 150. 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 in a predetermined direction. FIG. 3 is a schematic diagram of the F-side nozzle 201. In this embodiment, as shown in FIG. 3, the F-side nozzle 201 has 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 102 is provided. According to the through hole 301, the covered electric wire 150 can be appropriately guided. 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, the R-side grip 202 is disposed on the other side of the blade 102 with respect to the F-side nozzle 201. The R-side grip 202 is a member that grips the covered electric wire 150 led from the F-side nozzle 201 on the other side of the blade 102.

  4 and 5 are plan views of the electric wire processing apparatus 100. FIG. As shown in FIG. 4, in the wire processing device 100, an F-side terminal mounting device 241 and an R-side terminal mounting device 242 are provided on both sides of the blade 102 in plan view. As shown in FIG. 5, the F-side nozzle 201 rotates and is directed to each of the cutting blade 221, the F-side strip blade 222, and the F-side terminal mounting device 241. The R-side grip 202 is also rotated and directed toward the cutting blade 221, the R-side strip blade 223, and the R-side terminal attachment device 242. The F-side nozzle 201 and the R-side gripper 202 include drive mechanisms 252F and 252R and actuators 254F and 254R, respectively (see FIG. 1).

≪Electrode 108≫
As shown in FIG. 1, the electrode 108 is an electrode facing the core wire 152 through an insulator 154 with respect to the covered wire 150 held by the wire holder 106. In this embodiment, the F-side electrode 108 is provided in the wire drawing machine 206. The R-side electrode 108 is provided on the R-side grip 202. In this embodiment, the F-side electrode 108 is the wire drawing machine 206, and the R-side electrode 108 is the R-side grip 202. The F-side electrode 108 and the R-side electrode 108 are not limited to this. For example, the F-side electrode 108 may be provided on the wire feeding mechanism 204 or the F-side nozzle 201.

<< High-frequency signal generators 104F, 104R >>
The high frequency signal generators 104F and 104R are constant current type high frequency signal generators. Here, the “constant current type high-frequency signal generator” is a high-frequency signal generator set so as to keep the output current at a constant set value even when the load fluctuates. In this embodiment, high-frequency signal generators 104F and 104R are provided on the F side and the R side, respectively. The F-side high-frequency signal generator 104 </ b> F is electrically connected to a wire drawing machine 206 as the F-side electrode 108, and applies a high-frequency signal (high-frequency voltage) to the wire drawing machine 206. The R-side high-frequency signal generator 104 </ b> R is electrically connected to the R-side grip 202 as the R-side electrode 108, and applies a high-frequency signal (high-frequency voltage) to the R-side grip 202.

≪High frequency signal≫
Here, the high-frequency signal means an AC signal having a frequency of 10 KHz or more. For example, an AC signal having a frequency of 10 KHz or more and less than 3 MHz is preferably used as the high-frequency signal. The wire processing apparatus 100 uses high-frequency signals in a plurality of frequency bands. As the high-frequency signal output from the high-frequency signal generators 104F and 104R, a frequency substantially shifted from a frequency band used in another device of the wire processing device 100 may be set. For example, when a frequency band of 10 kHz or less is used in another device of the wire processing device 100, the frequency of the high-frequency signal generators 104F and 104R may be set to about 100 kHz. This makes it possible to reliably distinguish signals resulting from the high-frequency signals output from the high-frequency signal generators 104F and 104R from the electrical signals of other devices.

<< Core Contact Detection Unit 110 >>
The core wire contact detection unit 110 is a processing device that detects that the blade 102 and the core wire 152 are in contact based on the high frequency signals output from the high frequency signal generators 104F and 104R.

  In this embodiment, the core wire contact detection unit 110 detects that the blade 102 and the core wire 152 are in contact based on the high frequency signals output from the high frequency signal generators 104F and 104R. That is, in this embodiment, the core wire contact detection devices 200F and 200R are the high-frequency signals output from the high-frequency signal generators 104F and 104R to the F-side and R-side electrodes 108 (the wire drawing machine 206 and the R-side gripper 202). Are provided with input receivers 282 and 283. In this embodiment, the wiring connecting the high-frequency signal generators 104F and 104R to the wire drawing machine 206 and the R-side grip 202 is branched at branch points 284 and 285, and the wire drawing machine 206 is connected to the wire drawing machine 206 from the high-frequency signal generators 104F and 104R. The high-frequency signal output to the R-side gripper 202 is input to the receivers 282 and 283.

  The receiver 282 receives the high-frequency signal output from the F-side high-frequency signal generator 104F to the wire drawing machine 206 as the F-side electrode 108. The receiver 283 receives the high-frequency signal output from the R-side high-frequency signal generator 104R to the R-side gripper 202 as the R-side electrode 108. The high frequency signals received by the receivers 282 and 283 are sent to the core wire contact detection unit 110, respectively.

<< Operation of the wire processing apparatus 100 >>
The electric wire processing apparatus 100 sequentially performs cutting, stripping, and terminal attachment processing on the supplied coated electric wire 150.

≪Cut processing≫
In the cutting process, as shown in FIG. 4, the cutting blade 221 is closed and the covered electric wire 150 is cut while the covered electric wire 150 is held by the F-side nozzle 201 and the R-side gripper 202. In such a cutting process, the cutting blade 221 contacts the core wire 152. After the cutting process, both ends of the covered electric wire 150 are subjected to a strip process and a terminal attachment process in this order.

≪Strip treatment≫
In the strip process, the F-side nozzle 201 is rotated and directed toward the F-side strip blade 222 (see FIG. 5). Then, the front end portion 150F (F side) of the covered electric wire 150 held by the F side nozzle 201 is stripped by the F side strip blade 222. At the same time, the R-side grip 202 is rotated and directed toward the R-side strip blade 223. Then, the rear end portion 150R (R side) of the covered electric wire 150 held by the R side gripping portion 202 is stripped by the R side strip blade 223.

  The strip blades 222 and 223 on the F side and the R side are cut in the insulator 154 (see FIG. 2) of the covered electric wire 150 in the strip process, respectively, and the length direction of the covered electric wire 150 with respect to the covered electric wire 150. The insulator 154 is peeled off. In an ideal strip process, the F-side and R-side strip blades 222, 223 are not in contact with the core wire 152 and are cut into the insulator 154 to an extent sufficient to strip the insulator 154, The insulator 154 is stripped off. In an ideal strip process, the strip blades 222, 223 do not contact the core wire 152. That is, in the ideal strip process, the core wire 152 is not damaged.

  The arrangement of the F-side strip blade 222 and the R-side strip blade 223 is not limited to the form shown in FIG. That is, the arrangement of the strip blade 222 on the F side and the strip blade 223 on the R side needs to be slightly shifted from the path of the covered electric wire 150. In this case, as shown in FIG. 5, the F-side strip blade 222 and the R-side strip blade 223 may be shifted by moving left and right from the path of the covered electric wire 150 or may be shifted vertically. That is, the F-side strip blade 222 and the R-side strip blade 223 are not limited to the positions shown in FIG.

≪Terminal mounting process≫
In the terminal attachment process, as shown in FIG. 5, the F-side nozzle 201 further rotates outward. Then, the end portion 150F on the F side of the covered electric wire 150 is directed to the terminal attachment device 241 on the F side. At the end portion 150F on the F side of the covered electric wire 150, the insulator 154 is peeled off by strip processing, and the core wire 152 is exposed. In the F-side terminal attachment device 241, a predetermined terminal is attached to the F-side end portion 150 </ b> F of the covered electric wire 150. Similarly, the R-side grip 202 is further rotated. Then, the R-side end portion 150 </ b> R of the covered electric wire 150 is directed to the R-side terminal attachment device 242. At the end 150R on the R side of the covered electric wire 150, the insulator 154 is peeled off by strip processing, and the core wire 152 is exposed. In the R-side terminal attachment device 242, a predetermined terminal is attached to the R-side end 150 </ b> R of the covered electric wire 150.

<< Product Tray 261, Defective Product Tray 262 >>
Moreover, in this electric wire processing apparatus 100, as shown in FIG. 5, the covered electric wire 150 processed appropriately is moved to the product tray 261. Further, the covered electric wire 150 being processed is transferred to the defective product tray 262 when it is determined as defective. For example, the core wire contact detection unit 110 detects that the core wire 152 of the covered electric wire 150 being processed and the blade 102 are in contact with each other. More specifically, the contact between the blade 102 and the core wire 152 is detected by the cutting process and the strip process. Then, the blade 102 and the core wire 152 come into contact with each other, and the covered electric wire 150 determined to be defective is transferred to the defective product tray 262.

≪Core wire contact detection devices 200F, 200R≫
The core wire contact detection devices 200F and 200R perform the above-described electric wire processing while applying a high frequency voltage to the electrode 108, and based on the high frequency signal A output from the high frequency signal generators 104F and 104R, the blade 102 and the core wire 152 are connected. Detects contact.

<< Equivalent circuit diagram of the wire processing apparatus 100 >>
FIG. 6 shows an equivalent circuit diagram of the wire processing device 100 (core wire contact detection devices 200F and 200R). Here, the reference numerals in FIG. 6 correspond to the respective members and parts in FIG. A portion indicated by “G” indicates a portion electrically connected (grounded) to the mechanical ground (reference potential). The capacitance C1 is a space capacitance between the electrode 108 and the ground G. The capacitance C2 is the electrostatic capacitance of the covered electric wire 150 in which the insulator 154 of the covered electric wire 150 is interposed and the core wire 152 of the covered electric wire 150 and the electrode 108 face each other. The switch S1 expresses contact between the blade 102 and the core wire 152 and non-contact.

  In other words, the switch S <b> 1 represents the operation of the blade 102 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 102 and the core wire 152, indicating that the blade 102 and the core wire 152 are not in contact with each other. Further, when the switch S1 is closed, the blade 102 and the core wire 152 are in contact with each other. 7 and 8 show high-frequency signals output from the high-frequency signal generators 104F and 104R, respectively.

  In the electric wire processing apparatus 100 (core wire contact detection devices 200F and 200R), the state where the blade 102 and the core wire 152 are not in contact corresponds to the state where the switch S1 is opened in the equivalent circuit diagram shown in FIG. In this case, the capacitance C2 (see FIG. 6) of the covered electric wire 150 is not affected, and the voltage level of the high-frequency signal A output from the high-frequency signal generators 104F and 104R is approximately constant as shown in FIG. Indicates. On the other hand, when the blade 102 and the core wire 152 are in contact with each other, the electrode 108 connected to the constant current type high frequency signal generators 104F and 104R (constant current source) and the ground G are grounded through the blade 102. The core wire 152 faces the insulator 154. In this case, the capacitance C2 (see FIG. 6) of the covered electric wire 150 is affected, and the voltage level of the high-frequency signal A output from the high-frequency signal generators 104F and 104R is lowered as shown in FIG.

  As described above, the core wire contact detection devices 200F and 200R are configured to output the high-frequency signal to the electrode 108 facing the core wire 152 of the covered electric wire 150 and the electrode 108 via the insulator 154 of the covered electric wire 150. High-frequency signal generators 104F and 104R are provided. In this case, the coated wire 150 may be processed while outputting a high frequency signal from the high frequency signal generators 104F and 104R to the electrode 108. When the blade 102 and the core wire 152 are in contact with each other, the voltage level of the high-frequency signal output from the high-frequency signal generators 104F and 104R to the electrode 108 is lowered. Therefore, as shown in FIGS. 7 and 8, the voltage level of the high-frequency signal (see FIG. 7) in a state where the blade 102 and the core wire 152 are not in contact with each other and the blade 102 and the core wire 152 in contact with each other. By setting an appropriate threshold value t between the high-frequency signal voltage levels (see FIG. 8), it is possible to detect a state in which the blade 102 and the core wire 152 are in contact with each other.

  In this case, the core wire contact detection unit 110 determines that the blade 102 and the core wire 152 are in contact when the voltage level of the high-frequency signal output from the high-frequency signal generators 104F and 104R is lower than a predetermined voltage level. Should be detected. In this embodiment, since the blade 102 is grounded, when the blade 102 and the core wire 152 come into contact with each other, the change in the voltage level of the high-frequency signal becomes large, and the contact between the blade 102 and the core wire 152 is detected. It becomes easy.

  The electric wire processing apparatus 100 includes a cutting blade 221, an F-side strip blade 222, and an R-side strip blade 223. The core wire contact detection devices 200F and 200R are configured to detect that at least one of the cutting blade 221 and the strip blades 222 and 223 is in contact with the core wire 152. That is, in the electric wire processing apparatus 100, a high frequency signal is input to the electrode 108 from the high frequency signal generators 104F and 104R. The core wire contact detection unit 110 may evaluate the voltage level of the high-frequency signal output from the high-frequency signal generators 104F and 104R. The core wire contact detection devices 200F and 200R are based on the voltage level of the high-frequency signal, contact between the cutting blade 221 and the core wire 152, contact between the F-side strip blade 222 and the core wire 152, and R-side strip blade 223 and the core wire. Each contact with 152 can be detected.

  In this embodiment, it is not necessary to insulate the cutting blade 221, the F-side strip blade 222, and the R-side strip blade 223, respectively. Each blade 221, 222, 223 may be grounded. Therefore, the mechanical attachment structure of the cutting blade 221, the F-side strip blade 222, and the R-side strip blade 223 is simple. Further, it is not necessary to change the mechanical attachment structure of the cutting blade 221, the F-side strip blade 222, and the R-side strip blade 223. The core wire contact detection devices 200F and 200R can be easily applied to existing wire processing devices.

  In addition, as shown in FIG. 1, the electric wire processing apparatus 100 preferably includes a high-frequency signal generation device 104F of the F-side core contact detection device and a high-frequency signal generation device 104R of the R-side core contact detection device. It is good to have them separately. Thereby, it can be detected whether the blade 102 and the core wire 152 are in contact with each other on the F side or the R side.

  Further, as described above, the core wire contact detection devices 200F and 200R also function as a core wire contact detection device at the time of cutting, and can detect that the cutting blade 221 and the core wire 152 are in contact at the time of cutting. In this case, it is preferable that at least one of the F-side core wire contact detection device 200F and the R-side core wire contact detection device 200R detect that the cutting blade 221 and the core wire 152 are in contact with each other. For example, the F-side core wire contact detection device 200F may function as a core wire contact detection device at the time of cutting.

  Further, the high-frequency signal generator 104F of the F-side core contact detection device 200F and the high-frequency signal generator 104R of the R-side core contact detection device 200R may transmit high-frequency signals having different frequencies. In this case, it is preferable to make a difference between the frequencies of the F-side core wire contact detection device 200F and the R-side core wire contact detection device 200R to such an extent that the high-frequency signals detected can be clearly distinguished. Thereby, a mutual high frequency signal does not mutually become a noise, but the contact with the blade 102 and the core wire 152 can be detected more appropriately.

<< Problem when detecting "contact" between core wire 152 and blade 102 >>
As described above, the wire processing device 100 (core wire contact detection devices 200F and 200R) makes contact between the blade 102 and the core wire 152 based on the high frequency signals output from the constant current type high frequency signal generation devices 104F and 104R. Detected. However, when the core wire 152 of the covered electric wire 150 being processed is in contact with the grounded conductor, the present inventor has determined that the high-frequency signal generator 104F is not in contact with the blade 102 and the core wire 152. , 104R, the voltage level of the high-frequency signal is considered to be low. Accordingly, when the core wire 152 of the covered electric wire 150 being processed can come into contact with the grounded conductor, even if the blade 102 and the core wire 152 are not in contact, the blade 102 and the core wire 152 are not in contact with each other. We think that there is a possibility that it will be judged that it touched.

  Here, the “grounded conductor” means a state in which the conductor is not electrically floating. Conductors that are in an electrically floating state, that is, conductors that are not electrically connected anywhere (conductors that are insulated from ground) are excluded from “grounded conductors” here. Here, the blade 102 connected to the high-frequency signal generators 104F and 104R is excluded from the “grounded conductor”. Further, “the state where the core wire 152 is in contact with the conductor” means a state where the conductor and the core wire 152 are electrically connected. The “state where the core wire 152 is not in contact with the conductor” means a state where the conductor and the core wire 152 are not electrically connected.

≪Example of conductor≫
For example, in this embodiment, as shown in FIG. 5, the conveyor 400 is arranged to convey the R-side covered electric wire 150 after the processing by the electric wire processing apparatus 100. In this case, in the R-side covered electric wire 150, a terminal is already attached to the F-side end portion 150F. The conveyor 400 employs a rubber belt conveyor which is an insulator, but in some cases, the conductor portion (metal portion) may be exposed. Furthermore, the conductor part (metal part) of the conveyor 400 may be electrically grounded.

  In such a case, in the covered electric wire 150 (the covered electric wire 150 cut out to the R side) that is processing the R-side end portion 150R, the F-side end portion 150F after the strip processing is a metal portion of the conveyor 400. May touch. In particular, in the covered electric wire 150 having a length of about 2 m, the strip-processed F-side end 150F may be placed on the conveyor 400 when the R-side end 150R is processed. At this time, the F-side end 150F may touch the metal portion of the conveyor 400 without being properly controlled. That is, the conductor portion of the conveyor 400 can be exemplified as the “grounded conductor” that the core wire 152 of the covered electric wire 150 being processed can come into contact with. The “grounded conductor” is not limited to the conductor portion of the conveyor 400. The same problem can also occur on the F side. For example, the terminal part of the electric wire reel (not shown) which bundled the electric wire 150 supplied to the electric wire processing apparatus 100 may be earth | grounded. Thus, in the state where the core wire 152 is grounded (ground fault), erroneous detection may occur in the core wire contact detection devices 200F and 200R.

≪Error detection by core wire contact detection devices 200F and 200R≫
9 shows a state in which the core wire 152 of the covered electric wire 150 being processed (the covered electric wire 150 to be detected (see FIG. 1)) is in contact with another grounded conductor 156 in the above-described core wire contact detection devices 200F and 200R. FIG. Here, the switch S <b> 2 indicates contact or non-contact between the core wire 152 and another grounded conductor 156. When the switch S2 is closed, the core wire 152 and another grounded conductor 156 are in contact with each other.

  In this case, the core wire 152 of the covered electric wire 150 to be detected is in a state of being grounded to the ground G. That is, the state is substantially the same as the state in which the blade 102 grounded to the ground G is in contact with the core wire 152 (the state in which the switch S1 is closed in FIG. 6). In the core wire contact detection device 200, when the core wire 152 of the covered electric wire 150 being processed (the covered electric wire 150 to be detected) comes into contact with another grounded conductor, the high frequency signal generators 104F and 104R output the signal. As shown in FIG. 8, the voltage level of the high-frequency signal decreases as in the case where the blade 102 and the core wire 152 are in contact with each other. For this reason, in the core wire contact detection part 110, when the blade 102 and the core wire 152 contact, there exists a possibility of detecting incorrectly.

  In this case, when the core wire 152 can contact other conductors except the blade 102, the other conductors may be insulated. For example, in the above-described example, the conductor portion of the conveyor 400 may be insulated (electrically floating). In this case, contact between the conductors other than the blade 102 and the core wire 152 can be substantially ignored. For this reason, the core wire contact detection devices 200F and 200R are equivalent circuit diagrams as shown in FIG. Therefore, it is possible to prevent the voltage level of the high-frequency signal transmitted from the high-frequency signal generators 104F and 104R from being lowered when the core wire 152 is in contact with another conductor other than the blade 102. Thereby, the misjudgment of the core wire contact detection apparatuses 200F and 200R can be prevented.

  FIG. 10 shows an equivalent circuit diagram of the wire processing device 100 and the core wire contact detection devices 200F and 200R according to another embodiment. When the core wire 152 can contact other conductors 156 except the blade 102, the other conductors may be grounded via a resistor 158 as shown in FIG. Here, in the state where the core wire 152 and the conductor 156 are in contact with each other (the state where S2 is closed), the resistor 158 has a high voltage level of the high-frequency signal output from the high-frequency signal generators 104F and 104R to a certain degree. It is preferable that the electrical resistance value is maintained. For example, the resistor 158 may have an electrical resistance ground of about 1 MΩ or more.

  For example, in the state where the core wire 152 and the conductor 156 are in contact (the state where S2 is closed), the voltage level of the high-frequency signal output from the high-frequency signal generators 104F and 104R is in contact with the blade 102 and the core wire 152. Sometimes, the resistance value of the resistor 158 may be set so that a voltage level higher than the voltage level of the high-frequency signal output from the high-frequency signal generators 104F and 104R is maintained. Further, in a state where the core wire 152 and the conductor 156 are in contact (in a state where S2 is closed), the high frequency signal output from the high frequency signal generators 104F and 104R is from the threshold value t (see FIGS. 7 and 8). May be maintained at a high voltage level.

  This can prevent the voltage level of the high-frequency signal transmitted from the high-frequency signal generators 104F and 104R from being lowered when the core wire 152 is in contact with another conductor other than the blade 102. Further, erroneous determination of the core wire contact detection devices 200F and 200R is prevented.

≪Other forms≫
Next, other embodiments of the electric wire processing device and the core wire contact detection device will be described.

<< Wire processing device 100A, core wire contact detection device 200FA, 200RA >>
FIG. 11 shows the wire processing device 100A and the core wire contact detection devices 200FA and 200RA.

  The core wire contact detection devices 200FA and 200RA include a blade 102, an electric wire holder (F-side nozzle 201, R-side gripping portion 202, electric wire feeding mechanism 204, wire drawing machine 206), and a constant current type high-frequency signal generator 104F. , 104R, and a core wire contact detection unit 110.

  In this embodiment, the F-side high-frequency signal generator 104 </ b> F is connected to the F-side strip blade 222. The R-side high-frequency signal generator 104R is electrically connected to the R-side strip blade 223. The F-side high-frequency signal generator 104F and the R-side high-frequency signal generator 104R output high-frequency signals to the F-side strip blade 222 and the R-side strip blade 223, respectively.

  The core wire contact detection unit 110 detects that the blade 102 and the core wire 152 are in contact based on the high frequency signals output from the high frequency signal generators 104F and 104R. In this embodiment, the core wire contact detection unit 110 is configured to receive high-frequency signals output from the high-frequency signal generators 104F and 104R through the receivers 282 and 283, respectively.

≪Blade 102 mounting structure≫
In this embodiment, the cutting blade 221, the F-side strip blade 222, and the R-side strip blade 223 are attached to the blade driving mechanism 103. The blade drive mechanism 103 is insulated between the cutting blade 221 and the F-side strip blade 222. The cutting blade 221 and the R-side strip blade 223 are electrically connected. For this reason, the high-frequency signal input to the R-side strip blade 223 from the R-side high-frequency signal generator 104 </ b> R also reaches the cutting blade 221. Further, the high frequency signal from the F side high frequency signal generator 104F is inputted only to the F side strip blade 222 among the three blades. Further, the cutting blade 221, the F-side strip blade 222 and the R-side strip blade 223 are insulated from the mechanical ground G and are provided in an electrically floating state.

  That is, the electric wire processing apparatus 100A includes a cutting blade 221, an F-side strip blade 222, and an R-side strip blade 223. Further, a constant current type high frequency signal generator 104F for inputting a high frequency signal to the F side strip blade 222 and a constant current type high frequency signal generator 104R for inputting a high frequency signal to the R side strip blade 223 are provided. Yes. The core wire contact detection devices 200F and 200R indicate that the strip blades 222 and 223 and the core wire 152 are in contact with each other based on the high frequency signal output from the F side high frequency signal generation device 104F and the R side high frequency signal generation device 104R. To detect.

  In the electric wire processing apparatus 100A, the R-side strip blade 223 and the cutting blade 221 are electrically connected, and the R-side core wire contact detection device 200R also functions as a core wire contact detection device during cutting. Not limited to this, at least one of the F-side core wire contact detection device 200F and the R-side core wire contact detection device 200R may function as a core wire contact detection device at the time of cutting. For example, when the F-side strip blade 222 and the cutting blade 221 are electrically connected and the R-side strip blade 223 and the cutting blade 221 are insulated, the F-side core wire contact detection device 200F detects the core wire contact during cutting. Functions as a device.

<< Equivalent circuit diagram of wire processing apparatus 100A >>
FIG. 12 shows an equivalent circuit diagram of the wire processing device 100A (core wire contact detection devices 200FA, 200RA). Here, the reference numerals in FIG. 12 correspond to the respective members and parts in FIG. A portion indicated by “G” indicates a portion electrically connected (grounded) to the mechanical ground (reference potential). The capacity C1 is the space capacity between each blade 221, 222, 223 and the ground G. The capacitance C2 is an electrostatic capacitance between the core wire 152 and the ground G. The switch S1 expresses contact or non-contact between the blade 102 and the core wire 152. In other words, the switch S <b> 1 represents the operation of the blade 102 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 102 and the core wire 152, indicating that the blade 102 and the core wire 152 are not in contact with each other. Further, when the switch S1 is closed, the blade 102 and the core wire 152 are in contact with each other. 7 and 8 show high-frequency signals output from the high-frequency signal generators 104F and 104R, respectively.

  That is, in the electric wire processing apparatus 100A (core wire contact detection devices 200FA and 200RA), the state where the blade 102 and the core wire 152 are not in contact corresponds to the state where the switch S1 is opened in the equivalent circuit diagram shown in FIG. . In this case, the capacitance C2 of the covered electric wire 150 is not affected, and the voltage level of the high-frequency signal A output from the high-frequency signal generators 104F and 104R shows a substantially constant voltage as shown in FIG. On the other hand, the electrostatic capacity C2 between the core wire 152 and the ground G affects the state in which the blades 221, 222, 223 and the core wire 152 are in contact with each other. As shown in FIG. The voltage level of the high-frequency signal A output from the devices 104F and 104R is lowered.

  In this case, the coated wire 150 may be processed while outputting high-frequency signals from the high-frequency signal generators 104F and 104R to the blades 221, 222, and 223. When the blades 221, 222, and 223 and the core wire 152 come into contact with each other, the voltage level of the high-frequency signal A output from the high-frequency signal generators 104F and 104R to the electrode 108 becomes low. Therefore, as shown in FIGS. 7 and 8, the voltage level (see FIG. 7) of the high-frequency signal A in a state where the blades 221, 222, 223 and the core wire 152 are not in contact with each blade 221, 222. An appropriate threshold value t can be set between the voltage level of the high-frequency signal A (see FIG. 8) in a state where the H.223 and the core wire 152 are in contact with each other. As shown in FIGS. 7 and 8, it is possible to detect a state in which the blades 221, 222, and 223 are in contact with the core wire 152 based on the threshold value t.

≪Ground fault of core wire 152≫
In the wire processing apparatus 100A, when the switch S2 in FIG. 12 is closed, an equivalent circuit diagram in which the core wire 152 is grounded (ground fault) is obtained. In this case, in this case, in a state where the core wire 152 is grounded (ground fault) (a state where the switch S2 is closed), when the blade 102 and the core wire 152 are not in contact with each other, the high-frequency signal generators 104F and 104R are used. There is no particular effect on the high-frequency signal output from. Therefore, a high frequency signal A as shown in FIG. 7 is obtained.

  Further, when the blade 102 and the core wire 152 are in contact with each other in the state where the core wire 152 is grounded (ground fault) (the switch S2 is closed), the high-frequency signal generators 104F and 104R are connected to the blade 102 and the core wire. It is in a state of being grounded to the ground G via 152. At this time, the high-frequency signal output from the high-frequency signal generators 104F and 104R has a voltage level of approximately 0 as shown in FIG. That is, the receivers 282 and 283 detect a state in which the high-frequency signal generators 104F and 104R are grounded to the ground G. However, in this case, the blade 102 and the core wire 152 are in contact with each other, and the voltage level of the high-frequency signal output from the high-frequency signal generators 104F and 104R is lower than the threshold value t. And the core wire 152 can be detected, and no erroneous determination occurs.

  As described above, the core wire contact detection devices 200FA and 200RA may include constant current type high frequency signal generators 104F and 104R that output high frequency signals to the blades 221, 222, and 223, respectively. In this case, the core wire contact detection unit 110 may detect that the blades 221, 222, and 223 and the core wire 152 are in contact with each other based on the high frequency signals output from the high frequency signal generators 104F and 104R.

  Further, in the wire processing apparatus 100A, the core wire contact detection devices 200FA and 200RA may be configured as the F-side strip blade 222 and the R-side strip blade 223, and further configured as the cutting blade 221. It is good to have.

  Such an electric wire processing apparatus 100 </ b> A can particularly detect the contact between the F-side strip blade 222 and the core wire 152 and the contact between the R-side strip blade 223 and the core wire 152. Further, the electric wire processing apparatus 100A can detect contact between the cutting blade 221 and the core wire 152. In particular, the electric wire processing apparatus 100A uses constant current sources as the high-frequency signal generators 104F and 104R of the core wire contact detection devices 200FA and 200RA, and the blades 221, 222, and 223 from the high-frequency signal generators 104F and 104R. A high-frequency signal is input to the input.

  And it detects that each blade 221,222,223 and the core wire 152 contacted based on the high frequency signal output to each blade 221,222,223 from the high frequency signal generator 104F, 104R. For this reason, even when the core wire 152 is grounded (ground fault), when the blade 102 and the core wire 152 are in contact with each other, the high frequency is higher than when the blade 102 and the core wire 152 are not in contact with each other. The voltage level of the signal drops dramatically. For this reason, even in a situation where the core wire 152 is grounded (ground fault), an erroneous determination due to it is less likely to occur.

  In the electric wire processing apparatus 100A, the high-frequency signal generator 104F of the F-side core contact detection apparatus 200FA and the high-frequency signal generator 104R of the R-side core contact detection apparatus 200RA transmit high-frequency signals having different frequencies. May be. In this case, it is preferable to make a difference between the frequencies of the F-side core wire contact detection device 200FA and the R-side core wire contact detection device 200RA so that the high-frequency signals detected can be clearly distinguished. Thereby, a mutual high frequency signal does not mutually become a noise, but the contact with the blade 102 and the core wire 152 can be detected more appropriately.

  As described above, the electric wire processing apparatuses 100 and 100A exemplified here use the constant current type high frequency signal generators 104F and 104R, and can appropriately detect that the blade 102 and the core wire 152 are in contact with each other. As mentioned above, various forms were illustrated about one Embodiment of the electric wire processing apparatus. The electric wire processing apparatus according to the present invention is not limited to any of the above-described embodiments unless otherwise specified.

100, 100A Electric wire processing device 102 Blade 103 Blade driving mechanism 104F, 104R High frequency signal generator 106 Electric wire holder 108 Electrode 110 Core wire contact detection unit 150 Covered electric wire 150F Front end portion 150R Rear end portion 152 Core wire 154 Insulator 156 Other ground Conductor 158 Resistor 200 Core wire contact detection device 200F, 200R, 200FA, 200RA Core wire contact detection device 201 F side nozzle 202 R side grip portion 204 Wire feed mechanism 206 Wire drawing machine 221 Cutting blade 222 Strip blade (F side)
223 Strip blade (R side)
231 Blade mounting part (upper side)
232 Blade mounting part (lower side)
233 Drive mechanism 234 Actuator 241 Terminal mounting device (F side)
242 Terminal mounting device (R side)
252F, 252R Drive mechanism 254F, 254R Actuator 261 Product tray 262 Defective product tray 282, 283 Receiver 301 Through hole 302 Grip mechanism 400 Conveyor A High frequency signal C1 Capacity C2 Capacitance (capacity)
G ground (mechanical ground)
S1, S2 switch t threshold

Claims (14)

A blade,
For a covered electric wire whose core wire is covered with an insulator, an electrode facing the core wire via the insulator;
A constant current type high frequency signal generator for outputting a high frequency signal to the electrode;
Based on the high-frequency signal output from the high-frequency signal generator, a core contact detection unit that can detect that the blade and the core are in contact with each other;
A core wire contact detection device comprising:   The core wire contact detection device according to claim 1, wherein the blade is grounded. The core contact detection unit is
The contact of the blade and the core wire is detected when the voltage level of the high-frequency signal output from the high-frequency signal generator is lower than a predetermined voltage level. Core wire contact detection device.   The core wire contact detection device according to any one of claims 1 to 3, wherein the other conductor is insulated when the core wire can contact another conductor other than the blade. When the core wire can contact other conductors except the blade, the other conductors are grounded via a resistor,
Here, the resistor is
When the core wire and the conductor are in contact with each other, the voltage level of the high-frequency signal output from the high-frequency signal generating device is such that when the blade and the core wire are in contact, the high-frequency signal generating device The core wire contact detection device according to any one of claims 1 to 3, wherein the core wire contact detection device has an electrical resistance value that is higher than a voltage level of an output high-frequency signal. A cutting blade for cutting the coated electric wire;
A strip blade for stripping the end of the covered electric wire cut by the cutting blade;
The core wire contact detection device according to any one of claims 1 to 5, wherein the core wire contact detection device uses at least one of the cutting blade and the strip blade as the blade. Prepared,
Electric wire processing equipment. A cutting blade for cutting the coated electric wire;
An F-side strip blade for stripping the front end portion of the covered electric wire cut by the cutting blade;
An R-side strip blade for stripping a rear end portion of the covered electric wire cut by the cutting blade;
The core wire contact detection device according to any one of claims 1 to 6, wherein the F side strip blade is the blade, and the F side core wire contact detection device;
The core wire contact detection device according to any one of claims 1 to 6, further comprising an R side core wire contact detection device using the R side strip blade as the blade.
Electric wire processing equipment.   The electric wire processing apparatus according to claim 7, comprising the core wire contact detection device at the time of cutting described in any one of claims 1 to 6, wherein the cutting blade is the blade.   The electric wire processing apparatus according to claim 8, wherein at least one of the F-side core wire contact detection device and the R-side core wire contact detection device serves as the core wire contact detection device at the time of cutting. A blade,
An electric wire holder for holding a covered electric wire whose core wire is covered with an insulator;
A constant current type high frequency signal generator for outputting a high frequency signal to the blade;
Based on the high-frequency signal output from the high-frequency signal generator, a core contact detection unit that can detect that the blade and the core are in contact with each other;
A core wire contact detection device comprising: A cutting blade for cutting the coated electric wire;
An F-side strip blade for stripping the front end portion of the covered electric wire cut by the cutting blade;
An R-side strip blade for stripping a rear end portion of the covered electric wire cut by the cutting blade;
The core-wire contact detection device according to claim 10, wherein the F-side strip blade is the blade, and the F-side core wire contact detection device.
The core wire contact detection device according to claim 10, comprising an R side core wire contact detection device using the R side strip blade as the blade.
Electric wire processing equipment.   Furthermore, it is the core wire contact detection apparatus described in Claim 10, Comprising: The electric wire processing apparatus described in Claim 11 provided with the core wire contact detection apparatus at the time of a cutting | disconnection which makes the said cutting blade the said blade.   The electric wire processing apparatus according to claim 12, wherein at least one of the F-side core wire contact detection device and the R-side core wire contact detection device serves as the core wire contact detection device at the time of cutting.   The high-frequency signal generation device of the F-side core wire contact detection device and the high-frequency signal generation device of the R-side core wire contact detection device transmit high-frequency signals having different frequencies. The electric wire processing apparatus described in any one of Claim 13 to Claim 13.

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