JP2882249B2 - Wire stripping inspection equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for inspecting whether or not a skinning process for exposing a core wire of an end of an electric wire by peeling a covering of the end of the electric wire has been properly performed. The present invention relates to a stripping inspection apparatus for an end of a wire through which a terminal to which a terminal is crimped is passed in addition to a stripped end of the wire to be inspected.

[0002]

2. Description of the Related Art Conventionally, there is a continuous terminal crimping machine in which terminals are crimped to both ends of a covered electric wire. Generally, this continuous crimping machine is provided with a cutting / peeling device in the middle of a feeding path through which electric wires are intermittently fed. Further, a terminal crimping device is provided at each of two positions on the side of the feeding path and at a distance in the feeding direction with the cutting and peeling device interposed therebetween.

[0003] Usually, in the above continuous terminal crimping machine, the timing of crimping the terminal to the rear end of the electric wire, which is cut by the cutting and stripping device and is closer to the feeding direction than the cutting and stripping device, is used. Also, the timing for crimping the terminal to the front end of the electric wire on the side opposite to the feeding direction from the cutting and peeling device is set slightly earlier. That is, after the front end is moved to a corresponding terminal crimping device along a predetermined moving path and crimped the terminal, the rear end moves from a feed path to a corresponding terminal crimping device according to a predetermined moving path. Then, the terminal is crimped, and thereafter, the front end portion is returned to the feeding path by following the moving path in reverse, and thereafter, the wire on the side opposite to the feeding direction is cut by the cutting and peeling device into the feeding path. To be sent along. In addition,
The electric wire moved to the terminal crimping device in the above process is discharged along the moving direction to the terminal crimping device.

Incidentally, there has been provided an optical peeling inspection apparatus for optically determining whether or not the wire has been appropriately peeled in a continuous terminal crimping machine or the like. When this type of peeling inspection apparatus is applied to the above-described continuous terminal crimping machine, a moving path in which the front end of the electric wire moves from the feed path to the corresponding terminal crimping apparatus, and a rear end of the electric wire where the front end of the electric wire moves. It is provided on a moving path that moves from the supply path to the corresponding terminal crimping device.

[0005]

However, in the former moving path at the front end of the electric wire, in addition to the stripped end of the electric wire to be inspected, the terminal to be inspected is crimped. The wire ends also pass through. On the contrary,
The conventional optical peeling inspection system does not have a means for distinguishing between the object to be inspected and the one not to be inspected. was there. Therefore, there has been a problem that the conventional optical peeling apparatus cannot be applied as it is.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides an apparatus for inspecting the end of an electric wire which is not erroneously inspected even when the end of the electric wire which is not to be inspected is passed. That is.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a light emitting unit and a light receiving unit are arranged to face each other at a predetermined interval, and light is emitted from the light emitting unit to the light receiving unit. An inspection unit that irradiates and outputs a signal corresponding to the amount of light received by the light-receiving unit, and traverses the optical path from the light-emitting unit to the light-receiving unit. An external wire peeling inspection device for alternately passing an end of a wire to which a terminal is crimped, wherein the device detects the passage of the end of the wire based on a signal from the light receiving unit, To
Mode switching means for alternately switching between an inspection mode and a non-inspection mode; and, only in the inspection mode, receiving a signal corresponding to the passage of the end of the wire from the light receiving unit, and comparing the signal with a preset comparison reference value. And a quality determining means for determining the quality of the skinning process.

According to a second aspect of the present invention, a light-emitting unit and a light-receiving unit are arranged opposite to each other at a predetermined interval, and light is emitted from the light-emitting unit toward the light-receiving unit, and the light-receiving unit responds to the amount of received light. and it outputs a signal, comprising a first inspection unit and the second inspection unit, passing movement of predetermined wire ends in each of the inspection unit
An apparatus for inspecting the end of an electric wire, which repeats the operation in a predetermined passing order, wherein each of the passing operations is detected based on a signal from each of the light receiving units, and for each detection, the predetermined passing order is determined. In each inspection unit, based on the
Mode switching means for selectively switching to an inspection mode for performing inspection and a non-inspection mode for not performing inspection, and only in each of the above-described inspection modes, receives a signal corresponding to the passage of the wire end from the corresponding light receiving unit, and A pass / fail determination means for comparing the signal with a preset comparison reference value to determine pass / fail of the skinning process.

[0009]

According to the configuration of the first aspect of the present invention, the end of the wire to be inspected and the end of the wire not to be inspected alternately pass through the inspection section, and the mode switching means transmits the signal from the light receiving section. The inspection mode and the non-inspection mode are alternately switched every time the passage is detected by the signal. Then, only in the inspection mode, the pass / fail judgment means receives a signal corresponding to the passage of the end of the electric wire from the light receiving section, compares the signal with a preset comparison reference value, and judges pass / fail of the skinning process. Therefore, it is possible to eliminate an erroneous inspection that inspects the end of the electric wire that is not to be inspected.

According to the configuration of the second aspect of the invention, every time each passing operation performed in a predetermined passing order is detected, the mode switching means sets the next passing operation after the detected passing operation. To the inspection mode or the non-inspection mode. That is, if the next passing operation is the end of the peeled wire to be inspected in any one of the inspecting units, the mode is switched to the inspection mode by the inspecting unit, and the next passing operation is out of the inspection target. If it is the end of the terminal-equipped wire, switch to the non-inspection mode. Then, only in the inspection mode, the quality of the skinning process is determined by the quality determination means. Therefore, it is possible to eliminate an erroneous inspection that inspects the end of the electric wire that is not to be inspected. In addition, since the mode switching unit can switch between the inspection mode by the first inspection unit and the inspection mode by the second inspection unit, the inspection can be performed by the two inspection units using one pass / fail determination unit.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is an illustrative view showing a configuration of an apparatus for inspecting the end of a wire according to an embodiment of the present invention. Referring to FIG. 1, this inspection apparatus includes first and second optical inspection units A1 and A2, and a control circuit unit 20 electrically connected to both inspection units A1 and A2. . Each of the inspection units A1 and A2 is installed at a required position of a continuous terminal crimping machine described later. Each of the inspection sections A1 and A2 is provided with a mounting stay 11, and a light emitting device 12 and a light receiving device 13 are mounted on the stay 11 so as to oppose each other at a predetermined interval. The light emitter 12 is formed of a semiconductor laser, and outputs coherent parallel light from the output surface (surface facing the light receiver 13) 12S toward the light receiver 13.

The light receiving surface 13S of the light receiver 13 is
And a slit 14 is formed in the light receiving surface 13S as described later. The end of the wire W to be inspected is passed between the light emitting device 12 and the light receiving device 13 as shown by the arrow B. At this time, the electric wire W is passed between the light emitter 12 and the light receiver 13 at a substantially constant speed while being held by the later-described moving clamp device 6 and the clamp portions 64 and 71 of the index table 7. Has become. Since the light emitted from the light emitter 12 is parallel light as described above, there is no divergence of light, and even when the end of the wire to be inspected passes near the light emitter 12, it passes near the light receiver 13. In this case, the amount of light blocked by the end of the wire is constant. The irradiation light is
Light is received in a state defined by a certain amount and a certain range through the slit 14 provided in the light receiver 13, so that the light amount can be accurately detected.

Referring to FIG. 2 showing a timing chart, in this embodiment, channel 1 (hereinafter referred to as C
H1) at the timing at which the end of the stripped electric wire passes through the first inspection part A1 connected to the first inspection part A1 (a in the figure).
, The timing at which the end of the peeled wire passes through the second inspection part A2 connected to the channel 2 (hereinafter referred to as CH2) (indicated by b in the drawing), and the first inspection part A1 Are completed in this order (indicated by c in the figure) when the end of the wire to which the terminal is crimped passes. The present embodiment is characterized in that a first inspection mode in which an inspection is performed by the first inspection unit A1 and a second inspection mode in which an inspection is performed by the second inspection unit A2 in response to completion of each of the passing operations. The inspection mode is sequentially switched to the inspection mode of No. 2 and the non-inspection mode in which the inspection is not performed, and only in the inspection mode, the quality of the peeling process is determined, thereby inspecting the end of the electric wire outside the inspection target. This is to eliminate such false inspections.

Referring to FIG. 1, light emitting device 12 and light receiving device 13 are connected to control circuit unit 2 by connection cables 15 and 16.
Connected to 0. The control circuit unit 20 houses an electric circuit described later in a case 21. On the front surface of the case 21, a power supply switch 22, a part number display part 23 for displaying a part number to be operated, a CH1 display part 24a for displaying a read value of the first inspection part A1 connected to CH1,
A CH2 display section 25a for displaying a read value of the second inspection section A2 connected to CH2, an upper limit display section 29a for displaying an upper limit tolerance for a reference value, and a lower limit display section 29b for displaying a lower limit tolerance for a reference value. RU lights up during inspection
N lamp 26a, HOLD lamp 26b that lights when the display of the measured wire diameter is fixed, HI lamps 24b and 25b that light when the inspection product exceeds the upper limit, and when the inspection product falls below the lower limit LOW lamp 2 that lights up
4c, 25c, and OK lamps 24d, 25d that light up when the inspection product is within a normal range, a setting switch 27, a reset switch 28, and the like are provided.

FIG. 3 is a diagram for explaining the shape of the slit 14 provided in the slit 13S of the light receiver 13 and the principle of operation of the light receiver 13. Referring to FIG. 3, a slit 14 is formed in the light receiving surface 13S of the light receiver 13. In this embodiment, the slit 14 has a width of 1 mm and a length of 10 mm.
Is irradiated with laser light from the light emitting unit 12. The end of the electric wire W is moved in the length direction with respect to the slit 14. That is, the electric wire W is passed between the light emitting unit 12 and the light receiving unit 13 such that the shade of light blocked by the end of the electric wire W moves from one end of the slit 14 to the other end. Further, the position of the electric wire W in the axial direction is defined so that the shadow of the exposed core wire C intersects the slit 14 at the end of the electric wire W.

The light receiving section 13 detects a change in the amount of laser light obtained through the slit 14 and extracts the change as an analog output. Then, the result is stored in the control circuit unit 20.
It is used to judge the quality of the peeling process. FIG. 4 is a half-illustrated plan view of a continuous terminal crimping machine in which the apparatus for inspecting the end of a wire according to the present embodiment is installed, and FIG. 5 is a schematic side view of a main part of the continuous terminal crimping machine. In addition, the left and right in the following are the left and right in the figure, and the up and down are the up and down in the figure.

Referring to FIG. 4, in a machine frame 1 of the continuous terminal crimping machine, a covered electric wire W fed from an electric wire feeding roll (not shown) is measured along a feed path R extending in the vertical direction of the drawing. Pair of feed rollers 2a, 2
b, a cutting blade group 3 that cuts and cuts the coated electric wire W on the feed path R by opening and closing motion, and is disposed on a side portion of the cutting blade group 3 with the feed path R interposed therebetween. The pair of terminal crimping devices 4 and 5 and the feeding direction K
It has a clamp portion 64 for clamping the electric wire W on the upstream side,
A moving clamp device 6 for rotating the distal end Wa of the electric wire W in a plane orthogonal to the feed path R and moving the same to the terminal crimping device 4.
And a plurality of clamp portions 71 for clamping the rear end portion Wb of the electric wire W downstream of the cutting blade group 3 in the feeding direction K, and intermittently rotating in a plane orthogonal to the feeding path R. A terminal crimping device 5 and an index table 7 for moving to a discharge unit (not shown) are provided. FIG. 4 shows the electric wire W
After the terminal is crimped to the front end Wa of the wire W, the rear end portion of the electric wire W is cut by the cutting blade group 3 to perform a coating cut.

The pair of inspection sections A1 and A2 of the peeling inspection apparatus according to the present embodiment respectively include a moving path of the wire end by the moving clamp device 6 and a moving path of the wire end by the index table 7. Are located in FIG.
, The cutting blade group 3 has a known configuration in which a pair of strip blades 3b are arranged before and after the pair of cutting blades 3a in the feeding direction K. After the cutting by the cutting blade 3a and the strip blade 3b, the clamp portion 64 of the moving clamp device 6 is moved back and forth by a back-and-forth moving mechanism (not shown) to peel off the cut covering portion and to cut the wire W. The strip S is formed.

Referring to FIGS. 4 and 5, each of the terminal crimping devices 4 and 5 has a fixed side anvil 42 attached to a base 41 fixed to the upper surface of the machine frame 1. And a known configuration in which a crimper 43 that moves up and down is arranged. In the terminal crimping devices 4 and 5,
While crimping the plurality of connected terminals T one by one to the strip S of the electric wire W, a cut is made between each terminal T and the subsequent connection terminal row.

Referring to FIG. 4, the moving clamp device 6
Are paired along the paper surface direction and the machine frame 1
Column 61 (only one is shown in the figure), a shaft 62 rotatably supported by the column 61, and a base end rotatable with the shaft 62. And an arm 63 mounted so as to be relatively movable in the axial direction.
The clamp 6 fixed to the tip of the arm 63
4 and a clamp portion 64 via a shaft 62 and an arm 63.
A rotating mechanism (not shown) for rotating the lens in a predetermined angle range,
In order to strip the end of the cut wire W,
A longitudinal movement mechanism (not shown) for moving the arm 63 and the clamp portion 64 forward and backward along the feeding path R is provided.

In this continuous terminal crimping machine, the electric wire is cut by the cutting blade 3 from the state shown in FIG. 4 and the moving clamp device 6 and the index table 7 are moved in the front-rear direction to perform a peeling process. Then, the front end of the electric wire W on the upstream side in the feeding direction K with respect to the cutting blade group 3 is moved to the terminal crimping device 4 through the first inspection part A1 to crimp the terminal, and then cut. The rear end of the electric wire W on the downstream side in the feed direction K with respect to the blade group 3 is moved from the feed path R to the terminal crimping device 5 through the second inspection part A2 to crimp the terminal. After that, the front end portion is returned to the feed path R after passing through the first inspection portion A1 again, and thereafter, the wire on the upstream side in the feed direction K is fed to the cutting blade group 3. The paper is fed along the road R and returns to the state shown in FIG. Then, a detection signal as shown in FIG. 2 is obtained corresponding to the above operations (1) to (4). In addition, the electric wire moved to the terminal crimping device 5 in the above process is discharged along the moving direction to the terminal crimping device 5 by further rotation of the index table 7.

FIG. 6 is a block diagram showing the electrical configuration of the peeling inspection apparatus according to this embodiment. Referring to FIG. 6, the control circuit unit 20 includes a CPU 30 as a control center for controlling the entire control circuit. Also,
A clock 31 for giving a machine clock as an operation clock to the CPU 30, an EEPROM 32 storing an operation program including a mode setting and the like, and reference value data for judging pass / fail of the skinning process (core wires for each wire type in a normal case) EEP in which data on diameters etc. are stored
A ROM 33 is provided and connected to the CPU 30.
Note that the above-described EPROM 33 has a backup SR
AM may be used.

Further, a display 35 and an operation switch 36 are connected to the CPU 30 via a display / operation switch control IC 34. The operation switch 36 includes the above-described inspection condition setting switch 27 (see FIG. 1). The display 35 includes a product number display section 23, a channel 1 display section 24a, a channel 2 display section 24b, an upper limit display section 25a, a lower limit display section 25b, and a RUN lamp 26.
a, HOLD lamp 26b, HI lamps 24b, 25
b, LOW lamps 24c and 25c, and OK lamp 2
4d and 25d (see FIG. 1).

Further, a power supply circuit 37 is provided.
30. The inspection units A1 and A2 are connected to the power supply circuit 37, and power is supplied to the light emitter 12 via the sensor controller 38, respectively. The light emitting device 12, that is, the semiconductor laser 12 outputs a laser beam from the semiconductor laser 12 by the power supplied from the power supply circuit 37. This laser light is received by the light receiver 13. Then, as described above, the change in the light amount of the received light is extracted as an analog voltage from the light receiver 13 of each of the inspection units A1 and A2, and sent to the A / D converter 30a in the CPU 30 via the analog protection circuit 39. It is input and converted to a digital signal. Reference numeral 30b denotes a watchdog timer, which is used when software does not operate normally due to noise or the like.
The watchdog timer 30b functions to forcibly interrupt the CPU 30, thereby improving the operation reliability.

The CPU 30 converts the digital signal into E
By comparing it with the reference value data stored in the EPROM, it is determined whether or not the stripping of the end of the wire has been properly performed, and the result is given to the pass / fail determination circuit 40. If the result of the determination is a pass level, the inspection unit A
OK lamps 24d, 2 of channels corresponding to 1, A2
5d is turned on.

FIG. 7 is a diagram showing a change in signal level obtained by extracting a change in the amount of light detected by the light receiver 13 as a voltage value, and this voltage signal is supplied to the CPU 30. Then, in the CPU 30, based on the change of the voltage signal,
The quality of the peeling is determined. The CPU 30 is for forcibly interrupting the CPU 30 when software does not operate normally due to noise or the like. The reset circuit 41 is for canceling the inspection when the inspection is rejected or the like and canceling the inspection by the reset switch 28 described above. The buzzer 42 emits a warning sound when the inspection fails. The external signal input circuit 43 connects the terminal peeling processing inspection device to the terminal crimping devices 4 and 5 and the like (for example, in a case where the terminal crimping is not performed in the case of peeling failure, etc.), the terminal crimping devices 4 and 5 are used. This is for inputting an operation signal.

FIGS. 8 to 10 are flow charts of the processing for judging the quality of the skinning process performed by the CPU 30. FIG. Next, description will be made with reference to these figures. First, a first inspection mode for performing an inspection by the first inspection unit A1 is initialized (step s1), and the process proceeds to the next CH1 pass check subroutine program of FIG. Here, the detection voltage Vs is monitored for the first inspection unit A1 connected to CH1 by a predetermined process described in detail later, and the detection voltage Vs
Is recognized based on the change in the voltage, and every time a lower detection voltage Vs is detected during the passage of the electric wire, this voltage is replaced and stored as the bottom voltage Vb by the first inspection unit A1 (step s2). ).

Next, it is determined whether or not the end of the electric wire has passed the first inspection part A1 of the CH1 connection (step s3),
If the signal does not pass through the first inspection unit A1, the process proceeds to step s12 and thereafter, and the process regarding the second inspection unit A2 connected to CH2 is performed. When the end of the electric wire passes through the first inspection section A1, the mode is switched to the non-inspection mode (steps s3 to s5) on condition that the first inspection mode is set, and then the bottom voltage Vb is reduced. It is determined whether or not the pass level is satisfied (step s6). If the pass level is passed, the OK lamp 24d of the CH1 is turned on (step s7). If the pass level is not passed, either the HI lamp 24b or the LOW lamp 24c of the CH1 is turned on. (Step s8). The HI lamp 24b lights when the bottom voltage Vb exceeds the upper limit, and the LOW lamp 24c lights when the bottom voltage Vb falls below the lower limit.

Although the first inspection part A1 has passed,
When the first inspection mode is not set (steps s3 and s4), the mode is switched to the first inspection mode when the second inspection mode is set (steps s9 and s1).
0), when it is not in the second inspection mode, it is determined that the second inspection unit A2 has a non-passage error, and the HOLD lamp 26b
Is turned on (steps s9, s11).

In step s12, the same processing as the processing by the subroutine program shown in FIG. 10 (the flow is not shown) is performed, and the first inspection unit A for the CH2 connection is performed.
2, the detection voltage Vs is monitored, the passing operation is recognized based on the change in the detection voltage Vs, and each time a lower detection voltage Vs is detected during the passage of the electric wire, this is detected by the second inspection unit A2. And is stored as the bottom voltage Vb.

Next, it is determined whether the CH2 connection has passed or not passed to the second inspection unit A2 (step s13). If it has not passed, the process returns to step s2, and the first inspection unit A1 is again operated. Processing is performed. Second inspection unit A
If there is a passage to the second inspection mode, the second inspection mode is switched (steps s13 to s15) on condition that the non-inspection mode is set, and then the bottom voltage Vb is set.
Is determined to be a pass level (step s16). If the level is acceptable, the OK lamp 25d of CH2 is turned on (step s17). If the level is not acceptable, the HI lamp 25b of CH2 is passed.
Alternatively, one of the LOW lamps 25c is turned on (step s18).

On the other hand, if there is a passage through the second inspection section A2 but the non-inspection mode is not set, the first
HOLD lamp 2
6b is turned on (steps s13, s14, s19).
Next, the pass check processing corresponding to step s2 will be described with reference to the flow of FIG. First, CH
The detection voltage Vs of the one connection first inspection unit A1 is read (step n1). If the read detection voltage Vs is an abnormal voltage, an error display corresponding to the fact that the voltage of the first inspection unit A1 is abnormal is displayed on the CH2 display unit 25a (steps n2 and n14).

In the flow, A and B are flags corresponding to the non-passing area or the passing area in FIG. A is the current flag indicating the area at the time of the current reading, and B is the previous flag indicating the area at the time of the previous reading. The determination of the non-passing area or the passing area is performed by detecting the detection voltage Vs and the non-cutoff voltage Vcc.
Is determined by comparing with Vcc−α, taking into account a variation in the detection voltage Vs and the like, taking a predetermined margin α into consideration.

A description will be given based on the case where the change in the detection voltage is from the non-passing area on the left side to the passing area in FIG. 7 and thereafter to the non-passing area on the right side. If it is performed in the pass area (step n3), the current flag A is set to 1 corresponding to the non-pass area (step n4). Since the previous flag B corresponding to the end of the previous reading is 1 corresponding to the non-passing area (step n5), the previous flag B is replaced with the current flag A (step n7), and the process returns to the main program.

Thereafter, the reading at step n1 is Vs <
Vcc-α is performed in the passing area (step n
3) The current flag A is set to 2 corresponding to the passing area (step n8). Next, in step n9, it is determined whether or not the non-passing area has been switched to the passing area between the previous reading and the current reading. In the case of switching, the read detection voltage Vs is set to the bottom voltage Vb (steps n9 and n13), the previous flag B is replaced with the current flag A (step n7), and the process returns to the main program.

If the previous reading is also in the passing area, that is, if reading in the passing area is continued (step n9), the read detection voltage Vs and the bottom voltage stored in the previous reading are read. Vb (step n10), and only when the detection voltage Vs is smaller,
This detected voltage Vs is stored as a new bottom voltage Vb (step n11), and thereafter, the previous flag B is replaced with the current flag A (step n7), and the process returns to the main program.

Next, switching from the passing area to the non-passing area is performed.
If it changes, the process goes through steps n1 to n3.
This time at step n4, flag A corresponds to the non-passing area
1 because this is different from the previous flag B
Step n5), switching to the non-passing area is determined.
You. That is, the end of the passing operation is confirmed and stored
Is recognized as the core wire diameter (step
N6). After that, the last time Flag B was replaced with Flag A this time
Replace (step n7) and return to the main program. So
Then, the bottom voltage Vb obtained as described above is
First reference value V shown _HAnd the second reference value V indicating the lower limit_LBetween
The pass / fail is determined based on whether
You.

According to this embodiment, only when the next passing operation is for the end of the stripped electric wire to be inspected in any one of the inspection units A1 and A2, the inspection unit A
The inspection mode is switched to A1, A2, and only in this inspection mode, the quality of the peeling process is determined. Therefore, it is possible to eliminate an erroneous inspection such as inspecting an end of an electric wire that is not an inspection target, and furthermore, it is possible to perform an inspection using two control units A1 and A2 using one control circuit unit 20. Therefore, the structure can be simplified.

It should be noted that the present invention is not limited to the above embodiment, and the timings a, b, c of the respective passing operations shown in FIG.
May be in the order of b, a, c, or may be in the order of a, c, b. Also in these cases, mode switching is performed according to the order of the passing operation. Further, the present peeling inspection apparatus is applied to only the first inspection section A1 in which the end of the stripped electric wire to be inspected and the end of the terminal-attached electric wire not to be inspected are alternately passed. Can also. In this case, the mode switching means
The inspection mode and the non-inspection mode are alternately switched. Also in this case, it is possible to reliably eliminate an erroneous inspection that inspects the end of the electric wire that is not to be inspected.

In addition, various changes can be made without changing the gist of the present invention.

[0041]

According to the first aspect of the present invention, the mode is switched to the inspection mode in advance and the quality of the stripping process is determined only when the end of the stripped electric wire to be inspected passes. It is possible to reliably eliminate an erroneous inspection that inspects the end of the electric wire that is not to be inspected.

According to the second aspect of the present invention, only when the next passing operation is the end of the stripped electric wire to be inspected in any one of the inspecting units, the inspecting unit performs the next passing operation. Switch to inspection mode, only in this inspection mode,
The quality of the skinning process is determined. Therefore, it is possible to eliminate an erroneous inspection that inspects the end of the electric wire that is not the inspection target, and it is possible to perform the inspection with the two inspection units by using one pass / fail determination unit. The structure can be simplified.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing the configuration of a wire end peeling inspection apparatus according to an embodiment of the present invention;

FIG. 2 is a timing chart showing a relationship between a detection signal of each inspection unit and mode switching.

FIG. 3 is a diagram illustrating a shape of a slit provided on a light receiving surface of the light receiver and an operation principle of the light receiver.

FIG. 4 is a schematic plan view of a continuous terminal crimping machine provided with the present peeling inspection apparatus.

FIG. 5 is a schematic side view of a continuous terminal crimping machine.

FIG. 6 is a block diagram showing an electrical configuration of the present peeling inspection apparatus.

FIG. 7 is a diagram illustrating a change in signal level obtained by extracting a change in the amount of light detected by the light receiver as a voltage value.

FIG. 8 is a flowchart of a pass / fail determination process performed by the CPU.

FIG. 9 is a flowchart of a pass / fail determination process performed by the CPU.

FIG. 10 is a flow chart of a subroutine of a CH1 passage check in a flow of a pass / fail judgment process of the skinning performed by the CPU.

[Explanation of symbols]

 Reference Signs List 12 light emitting device 13 light receiving device A1 first inspection unit A2 second inspection unit W electric wire 20 control circuit unit 30 CPU 33 EEPROM

Continuation of the front page (56) References JP-A-59-216044 (JP, A) JP-A-58-95911 (JP, A) JP-A-59-217137 (JP, A) JP-A-61-165646 (JP) JP-A-62-198739 (JP, A) JP-A-5-296936 (JP, A) JP-A-62-198739 (JP, A) Japanese Utility Model Application No. Sho 61-122510 (JP, U) Japanese Utility Model Application 63-167245 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01N 21/84-21/90 H02G 1/12 H01B 13/00 G01R 31/02

Claims (2)

(57) [Claims] An inspection unit for arranging a light emitting unit and a light receiving unit to face each other at a predetermined interval, irradiating light from the light emitting unit to the light receiving unit, and outputting a signal corresponding to the amount of light received by the light receiving unit; A wire end that passes through the optical path from the light-emitting portion to the light-receiving portion and alternately passes through a stripped wire end portion to be inspected and a non-tested wire end portion to which the terminal is crimped. A mode switching means for detecting passage of an end of a wire based on a signal from the light receiving unit, and alternately switching between an inspection mode and a non-inspection mode for each detection, and the inspection Only in the mode, a pass / fail judgment means for receiving a signal corresponding to the passage of the end of the electric wire from the light receiving section, comparing the signal with a preset comparative reference value, and judging pass / fail of the skinning process. Inspection device for stripping of wire ends. A first light-emitting unit and a light-receiving unit which are arranged opposite to each other at a predetermined interval, irradiate light from the light-emitting unit to the light-receiving unit, and output a signal corresponding to a light-receiving amount of the light-receiving unit; An inspection apparatus for peeling a wire end, comprising an inspection unit and a second inspection unit, wherein a passing operation of a predetermined wire end is repeated in a predetermined passing order in each inspection unit. Each passing operation is detected based on the signal of the above, and for each detection, based on the preset passing order,
Mode switching means for selectively switching between an inspection mode in which inspection is performed and a non-inspection mode in which inspection is not performed in each inspection unit so as to correspond to a passing operation next to the detected passing operation; Only in the mode, receive the signal corresponding to the passage of the wire end from the corresponding light receiving section,
A stripping inspection apparatus for an end of an electric wire, comprising: a quality judging means for comparing the signal with a preset comparison reference value to judge the quality of the stripping.