JP4611181B2 - Wire inspection equipment for wire ends - Google Patents

Description

  The present invention relates to an apparatus for inspecting an exposed core wire by removing the insulation coating from the end portion of the electric wire, and more specifically, is there a defect in the strand constituting the core wire by irradiating the core wire with laser light? The present invention relates to a technology for inspecting whether there is any.

  Conventionally, an electric wire terminal processing device that removes the insulation coating from the electric wire terminal portion to expose the core wire and crimps the terminal to the core wire has been widely used. There are cases where devices for inspecting whether or not the inspection has been performed are arranged in parallel (for example, see Patent Documents 1 and 2 below).

  The structure of the “wire end stripping inspection apparatus” described in Patent Document 1 described below will be outlined with reference to FIG. 19. This apparatus strips the insulation coating of the terminal portion of the electric wire 1 to dispose the core wire 2. In order to inspect whether the exposure operation has been performed satisfactorily, laser light is emitted from the light emitter 3 toward the light receiver 4.

  When the core wire 2 of the electric wire 1 moving in the direction of the arrow in FIG. 19 crosses the optical path of this laser beam, the amount of received laser beam incident on the slit 6 provided on the light receiving surface 5 of the light receiver 4 decreases. To do.

  FIG. 20 shows a temporal change in the detection voltage according to a change in the amount of light received incident on the slit 6, where the region 1 is a state before the core wire 2 crosses the optical path of the laser beam, and the region 2 is the laser beam when the core wire 2 is a laser. The state where the optical fiber has started to cross the optical path and the region 3 correspond to the state in which the core 2 is in the process of crossing the optical path of the laser light.

In the apparatus shown in FIG. 19, when the state in which the detection voltage VD in the region 3 is between the first reference value VH and the second reference value VL continues for a predetermined time, the skinning process is performed well. judge.
JP-A-6-225423 Japanese Patent No. 2651305

  By the way, in order to remove the insulation coating from the terminal portion of the electric wire 1 and expose the core wire 2, various states may occur as shown in FIG. .

  That is, FIG. 21A shows a state in which the removal operation has been performed satisfactorily, and the core wire 2 is exposed and has no defect.

  On the other hand, in the state of FIG. 21B, the insulation coating 1a remains, and in the state of FIG. 21C, the core wire 2 is completely cut by the strip blade.

  Furthermore, in the state of FIG. 21D, the upper core wire 2a remains among the plurality of strands constituting the core wire 2, but the lower strand 2b is missing, and the state of FIG. Then, both the upper and lower strands 2a and 2b are missing.

  Therefore, in addition to the function of detecting whether or not the insulation coating 1a has been removed, the device for inspecting whether or not the work for removing the insulation coating has been performed successfully has a defect in the exposed core wire 2. A function for detecting whether or not there is also required.

  In addition, the electric wire to be inspected is generally composed of 7 to 19 strands, and has a structure in which the remaining strands are spirally wound around one central strand.

  As an example of such an electric wire, the electric wire shown in FIG. 22A has a structure in which six strands are arranged at equal intervals of 60 degrees in the circumferential direction around one central strand. .

  At this time, the conventional apparatus shown in FIG. 19 is of a type in which inspection is performed using laser light irradiated along one optical axis.

  Thus, as shown in FIG. 22A, when the width of the portion where the irradiated laser light is blocked by the core wire 2 is referred to as “light-shielding width”, as shown in FIG. Even when the strands 2b, 2b 'and 2d are lost, or when the upper strands 2a, 2a' and 2c are missing as shown in FIG.

  Similarly, when the angle position of the core wire 2 is changed as shown in FIG. 23A, the lower strands 2b ′ and 2d are lost as shown in FIG. As shown in (c), there is no change in the light shielding width even when the upper strands 2a and 2c are lost.

  Therefore, the conventional apparatus shown in FIG. 19 can inspect whether or not the insulation coating 1a at the end of the electric wire has been removed, but cannot inspect for the presence or absence of the strands constituting the core wire.

  Furthermore, the conventional apparatus shown in FIG. 19 determines whether or not the insulation coating 1a of the wire terminal portion has been removed based on the relationship between the detection voltage VD and the first reference value VH and the second reference value VL. is there.

  For this reason, it is necessary to set the first reference value VH and the second reference value VL that are determination criteria, but as described above, the light shielding width changes depending on the angular position of the core wire.

  Accordingly, it is necessary to set a determination standard by inspecting a large number of electric wires whose core wires are not missing, and the setting work is complicated.

  Furthermore, in the conventional apparatus shown in FIG. 19, when dust or the like adheres to the lenses and filters of the light emitter 3 and the light receiver 4, the light projection amount and the amount of light received decrease, and the detection voltage VD decreases. At this time, since the conventional apparatus shown in FIG. 19 uses a laser beam irradiated along one optical axis, whether the decrease in the detection voltage VD is caused by a change in the light shielding width, dust or the like It is difficult to discriminate whether it is due to the adhesion of the light source or the irradiation intensity of the laser beam, and the work of maintaining and inspecting the light emitter 3 and the light receiver 4 becomes complicated.

  Therefore, the object of the present invention is not only to solve the above-described problems of the prior art, but also to reliably inspect whether or not there is a defect in the core wire constituting the core wire exposed at the end of the electric wire. It is an object of the present invention to provide a core wire inspection device for an end portion of an electric wire, which can easily set a reference and can reduce labor of maintenance and inspection work.

The means described in claim 1 for solving the above problem is
An apparatus for inspecting the core wire by irradiating the exposed core wire by removing the insulation coating of the electric wire terminal portion,
Laser light irradiation means for irradiating laser light toward the core wire;
Laser light receiving means for receiving the laser light irradiated from the laser light irradiation means and outputting a detection voltage corresponding to the received light amount;
A determination unit that determines the quality of the core wire based on a received light amount corresponding to a detection voltage obtained from the laser light receiving unit and a determination criterion;
Relative rotation means for relatively rotating the laser light irradiation means, the laser light receiving means, and the core wire around an axis of the core wire is provided.

  In other words, the core wire inspection device for the electric wire terminal portion described in claim 1 is variously arranged with respect to the core wire by relatively rotating around the axis of the core wire for inspecting the laser light irradiation means, the laser light receiving means and the core wire. Since the laser beam is irradiated from various directions, the plurality of strands constituting the core wire overlap each other in the optical axis direction of the laser beam and the state where inspection becomes impossible is eliminated, and these strands are defective. Can be reliably inspected.

The means described in claim 2 is the core wire inspection apparatus according to claim 1,
The relative rotating means includes first rotating means for integrally rotating the laser light irradiation means and the laser light receiving means around the axis of the core wire.

  That is, since the core wire inspection device of the electric wire terminal part described in claim 2 rotates the laser light irradiation means and the laser light receiving means integrally around the axis of the core wire, the core wire to be inspected is brought into a stationary state. While maintaining, it is possible to surely inspect whether or not the plurality of strands constituting the core wire are defective.

  According to a third aspect of the present invention, in the core wire inspection apparatus according to the first or second aspect, the relative rotation means includes second rotation means for rotating the core wire around its axis. It is characterized by that.

  That is, in the apparatus for inspecting a core wire of an electric wire terminal portion according to claim 3, the core wire is rotated around its axis by using the second rotating device while the laser beam irradiation unit and the laser beam receiving unit are kept stationary. In this case, it is possible to prevent unnecessary vibrations from being generated in the laser light irradiation means and the laser light receiving means, which are precision instruments, and to increase the inspection accuracy.

  Also, since the laser light irradiation means and laser light receiving means that are connected to a control cable or the like and whose rotation angle is limited are stationary and the core wire is rotated, the relative rotation angle of the core wire when performing the inspection is set. For example, 360 degrees can be selected.

  In the case where the laser beam irradiating unit and the laser beam receiving unit are rotated together using the first rotating unit and the core wire is rotated in the opposite direction using the second rotating unit, both The core wire can be quickly inspected by increasing the angular speed of the relative rotation.

In addition, the means described in claim 4 is the wire end inspection device for a wire terminal according to any one of claims 1 to 3,
The laser light irradiation means has a plurality of laser light irradiation units arranged in parallel in the circumferential direction of the axis, each of which irradiates laser light from a plurality of directions perpendicular to the axis of the core;
In addition, the laser light receiving means includes a plurality of laser light receiving units that respectively receive the laser beams emitted from the plurality of laser light irradiation units.

  The optical axes of the laser beams emitted from the plurality of laser beam irradiation units can be arranged on a single plane extending perpendicular to the axis of the core wire, or shifted in the axial direction of the core wire. It is also possible to arrange them in such a manner that they are shifted in the direction of conveying the core wire to be inspected.

  Also, irradiate one of the laser beams from directly above and below the core wire, and irradiate the remaining laser beams obliquely from the upper front and from the upper rear of the core diagonally downward, or the remaining laser light to the core wire. On the other hand, it is also possible to irradiate obliquely upward from obliquely lower front and obliquely rear lower.

  That is, since the core wire inspection device for the electric wire terminal portion according to claim 4 irradiates the core wire with a plurality of laser beams from the circumferential direction thereof, the laser beam irradiation means and the laser for inspecting the core wire Even if the relative rotation angle between the light receiving means and the core wire is small, it is possible to inspect the presence or absence of all of the plurality of strands constituting the core wire.

  Therefore, according to the core wire inspection device for an electric wire terminal portion described in claim 4, the speed of inspecting the core wire can be greatly increased.

According to a fifth aspect of the present invention, in addition to the core wire inspection device according to any one of the first to fourth aspects, core wire positioning means for positioning the tip of the core wire coaxially with the axis of the core wire is added. .
The core wire positioning means includes a conical inner wall surface that widens toward the side of the core wire and engages the tip of the core wire to position the tip of the core wire coaxially with the axis of the core wire. A member and an actuator for reciprocating the positioning member in the axial direction of the core wire.

  When the core wire is rotated using the second rotating means, the core wire positioning means positions the core wire while slidably holding it.

  That is, in the apparatus for inspecting a core wire of an electric wire terminal section according to claim 5, since the tip of the core wire can be positioned coaxially with the axis of the core wire by using the core wire positioning means, the laser light irradiation means, the laser light receiving means and the core wire Can be kept coaxial with each other, and the inspection accuracy of the core wire can be further increased.

The means described in claim 6 is:
An apparatus for inspecting the core wire by irradiating a twisted core wire after removing the insulation coating of the electric wire terminal portion and exposing the wire,
Laser light irradiation means for irradiating laser light toward the core wire;
Laser light receiving means for receiving the laser light irradiated from the laser light irradiation means and outputting a detection voltage corresponding to the received light amount;
A determination unit that determines the quality of the core wire based on a received light amount corresponding to a detection voltage obtained from the laser light receiving unit and a determination criterion;
Core wire displacing means for moving the core wire in the axial direction thereof.

  It is also possible to inspect the core wire after twisting the exposed core wire by adding a core wire twisting means to the core wire inspection device itself instead of the wire terminal processing device.

  In the terminal treatment of the electric wire, the core wire may be twisted after the insulating coating is removed to expose the core wire.

  At this time, each of the plurality of strands constituting the twisted core wire extends spirally around the axis of the core wire.

  Therefore, when the core wire is displaced in the axial direction while irradiating the twisted core wire with the laser beam, the laser beam is irradiated while rotating the untwisted core wire around the axis. As in the case of performing, it is possible to inspect the presence / absence of all of the plurality of strands constituting the core wire.

  That is, according to the core wire inspection device of the electric wire terminal section described in claim 6, since it is not necessary to rotate the laser light irradiation means and the laser light receiving means or the core wire, the speed of inspecting the core wire can be greatly increased. it can.

  ADVANTAGE OF THE INVENTION According to this invention, the core wire test | inspection apparatus which can test | inspect reliably whether there is a defect | deletion in the strand which comprises the core wire exposed to the electric wire terminal part can be provided.

  Hereinafter, with reference to FIGS. 1-18, each embodiment of the core wire test | inspection apparatus of the electric wire terminal part which concerns on this invention is described in detail.

  In the following description, the direction in which the core of the electric wire to be inspected extends is referred to as the left-right direction, the direction in which the electric wire to be inspected is conveyed is referred to as the front-rear direction, and the vertical direction is referred to as the up-down direction.

First Embodiment First, the structure and operation of a core wire inspection apparatus according to a first embodiment will be described with reference to FIGS.

  A core wire inspection apparatus 100 according to the first embodiment shown in FIGS. 1 and 2 includes a device main body 10 incorporating a laser light irradiation means, a laser light receiving means, and a control unit, and the device main body 10 around the axis of the core wire 2. First rotating means 30 for rotating the core wire 2 and second rotating means 40 for rotating the core wire 2 about its axis.

  The device main body 10 of the core wire inspection device 100 has a base portion 11a, an upper arm portion 11b, and a lower arm portion 11c, and the overall shape when viewed from the front-rear direction is substantially U-shaped as shown in FIG. ing.

  The core wire 2 of the electric wire 1 extending horizontally in the left-right direction (the left-right direction shown in FIG. 1) moves in the front-rear direction (the arrow direction in FIG. 2) in the gap 12 between the arms 11b, 11c. It is like that.

  The base portion 11a of the apparatus main body 10 has a laser light generating means 13 shown in FIG. 3 and a laser light equalizing means 14 (splitter, mirror, etc.) for dividing the laser light generated by the laser light generating means 13 into three equal parts. ) And three laser beam irradiation means (lens, filter, etc.) 15a, 15b, 15c are built in the upper arm portion 11b.

  Thereby, the intensity | strength of the laser beam irradiated toward the core wire 2 from the three laser beam irradiation means 15a, 15b, 15c is mutually equal.

  As shown in FIGS. 1 and 2, the laser beams irradiated from the laser beam irradiation means 15a, 15b, and 15c travel along the first to third optical axes 16, 17, and 18, respectively. It reaches three laser light receiving means (photodiodes, etc.) 19a, 19b, 19c built in the part 11c.

  Each laser beam has a width in the front-rear direction of about 5 mm, which is sufficiently larger than the diameter of the core wire to be inspected, and a thickness in the left-right direction of about 0.3 mm. Irradiated as a thin cross-sectional shape.

  As shown in FIGS. 1 and 2, the first to third optical axes 16, 17, and 18 are on one plane extending in the front-rear and up-down directions, and the first optical axis 16 is vertical from above to below. The second optical axis 17 extends obliquely from above and obliquely forward and downward, and the third optical axis 18 extends from obliquely upward and obliquely downward and downward.

  The second optical axis 17 and the third optical axis 18 intersect with each other at an angle of 45 degrees symmetrically with respect to the first optical axis 16 when viewed from the left-right direction. Yes.

  The three light receiving means 19a, 19b, 19c each output a detection voltage corresponding to the amount of received laser light.

  Then, the detected voltage, which is an analog signal output from the three light receiving means 19a, 19b, 19c, is converted into a digital signal representing the received light level corresponding to the detected voltage in the A / D converter shown in FIG. Is done.

  Further, the received light amount level represented by the digital signal output from each A / D converter changes as shown in FIG. 4, where region 1 is the state before the core wire 2 crosses the optical path of the laser beam, and region 2 is the core wire. Region 2 corresponds to a state in which the laser beam has started to cross the optical path, region 3 corresponds to a state in which core wire 2 is in the process of crossing the optical path of laser light, and region 4 corresponds to a state in which core wire 2 exits the optical path of the laser beam. ing.

  The control part 20 shown in FIG. 3 is built in the base part 11a of the core wire inspection apparatus 100.

  The digital signal output from the A / D converter is input to the three correction units 21a, 21b, and 21c of the control unit 20, respectively, and the received light amount level is corrected there.

  More specifically, the detection voltages output from the three light receiving means are converted into digital signals, each of which is corrected to the same level, and as a result, the light receiving sensitivity of the three light receiving means is corrected to the same level. Is called.

  The correction control means 22 is configured so that the level of the received light amount represented by the digital signals corrected by the three correction means 21a, 21b, and 21c matches a predetermined value when each laser beam is not blocked by the core wire 2. In addition, each correction means 21a, 21b, 21c is controlled.

  Accordingly, when the region 1 in the graph of FIG. 4, that is, the core wire 2 does not cross the optical path of the laser light, the levels of the received light amounts represented by the three digital signals are equal.

  The digital signals whose received light amount levels are corrected by the three correction units 21 a, 21 b, and 21 c are input to the maximum value / minimum value detection unit 23.

  At this time, if the core wire 2 moves forward in the transport direction and blocks the optical path of the laser light, the received light amount level represented by the digital signal input to the maximum value / minimum value detecting means 23 rapidly decreases (area of the graph in FIG. 4). 2).

  When the received light amount level represented by at least one of the three digital signals falls below a predetermined value c% with respect to the received light amount level in the region 1, the maximum value / minimum value detection unit 23 is notified. The included trigger detection means (not shown) detects this drop and activates the sampling function.

  Then, the maximum value / minimum value detection means 23 outputs the input three digital signals at a predetermined time while the core wire 2 moves forward and completely blocks the optical path of the laser light (area 3 in the graph of FIG. 4). Sampling is performed a predetermined number of times, and information on the amount of received light is buffered.

  Then, the maximum value and the minimum value of the received light amount level are detected based on the buffered data, and are output to the determination reference setting unit 24 and the determination unit 25, respectively.

  The criterion setting means 24 sets an allowable range as shown in FIG. 4 based on the maximum value and the minimum value of the received light amount level obtained by inspecting the non-defective core wire 2 having no defect in the element wire. .

That is, the upper limit of the received light amount is calculated by adding the value of a% to the maximum value of the received light amount obtained by inspecting the non-defective core wire 2, and obtained by inspecting the non-defective core wire 2. The lower limit light reception amount is calculated by subtracting the b% value from the minimum value of the light reception amount. Thus, the allowable range (judgment criterion) is between the upper limit light reception amount level and the lower limit light reception amount level.

  The judgment level input means 26 inputs the values of a% and b% used for calculating the upper and lower received light amounts to the judgment reference setting means 24, respectively.

  Thereby, for example, when changing the dimension or type of the electric wire 1 or when changing the bending correction level of the electric wire 1, the determination criterion can be set appropriately.

  The determination means 25 is when both the maximum value / minimum value output from the maximum value / minimum value detection means 23 in the inspection of the core wire 2 of the electric wire 1 that is the product to be inspected are within the allowable range. A pass determination signal is output to the output, and when either or both are not within the allowable range, a fail determination signal is output.

A first rotating means 30 shown in FIG. 1 includes a support shaft 31 connected to the end of the apparatus body 10 and extending coaxially with the axis of the core wire 2, and a servo motor (not shown) that rotationally drives the support shaft 31. ), And a rotary encoder (not shown) for detecting the rotation angle of the support shaft 31.
The second rotating means 40 shown in FIG. 1 includes a pair of upper and lower sandwiching members 41a and 41b each having a semi-cylindrical shape that can sandwich the vicinity of the core wire 2 of the electric wire 1 in the vertical direction, and these clamping members 41a. , 41b, a pair of upper and lower support members 42a, 42b for pivotally supporting each other, a pair of upper and lower actuators 43a, 43b for contacting and separating the support members 42a, 42b in the vertical direction, and the core wire 2 about its axis. And a servo motor 44 with a rotary encoder that reciprocally rotates.

  The pair of upper and lower clamping members 41a and 41b are engaged with each other in a state where the electric wire 1 is integrally clamped to be cylindrical, and are integrally rotated by a servo motor 44 via a driving mechanism (not shown).

  Next, with reference to FIGS. 5 to 8, a product inspection using the core wire inspection apparatus 100 of the first embodiment will be described.

  In this product inspection, the apparatus is first inspected, then a determination standard (allowable range) is set using a non-defective wire, and then the product is inspected.

  In the core wire inspection apparatus 100 according to the first embodiment, the laser light generated by one laser light generating means 13 is equally divided into three by the laser light equal distribution means 14 and three laser light irradiation means 15a, 15b, 15c. Is distributed.

  Thereby, since the intensity of the laser beam irradiated to the core wire 2 along the three optical axes 16, 17, 18 from the three laser beam irradiation means 15a, 15b, 15c is equal to each other, the core wire 2 transmits each laser beam. In the unshielded state, that is, the state of region 1 in FIG. 4, the received light amount levels represented by the digital signals respectively input to the maximum value / minimum value detection means 23 should be equal.

  However, when there is a deviation in the received light level represented by these digital signals, the correction control means 22 performs three corrections as shown in steps (hereinafter referred to as S) 1 to S4 of the flowchart shown in FIG. The digital signals input to the maximum value / minimum value detection means 23 from the respective correction means 21a, 21b, 21c in a state where the operation of the means 21a, 21b, 21c is controlled respectively and the core wire 2 does not block each laser beam are represented. Make the received light level equal.

  In addition, since such an inspection is performed automatically and continuously while the inspection of the core wire 2 is not performed, it is not necessary for the operator to adjust before starting the inspection of the core wire 2.

  In addition, dust or the like adhered to any of the laser light irradiation means 15a, 15b, 15c or the laser light receiving means 19a, 19b, 19c during the inspection, and the received light amount level represented by the digital signal output therefrom decreased. In this case, since the received light amount level can be corrected by the correcting means to which the digital signal is input, the inspection accuracy of the core wire can always be kept high.

  Next, as shown in the flowchart of FIG. 6, a non-defective wire 1 is supplied to set a determination criterion (allowable range).

  More specifically, as shown in S11 of the flowchart of FIG. 6, when the non-defective electric wire 1 is supplied and the core wire 2 blocks the optical path of the laser light, the three values input to the maximum value / minimum value detecting means 23 The received light level represented by the digital signal should drop sharply (region 2 in the graph of FIG. 4).

  However, in the determination step of S12, if it is determined that the decrease in the received light amount level is smaller than the predetermined value (c%), an abnormality may occur in the inspection apparatus 100. The setting operation is stopped, and the process proceeds to S14 to inspect the inspection apparatus 100.

  Then, when the inspection of the inspection apparatus 100 is completed, the good electric wire 1 is supplied again.

  On the other hand, if it is determined in step S12 that the decrease in the amount of received light is greater than a predetermined value (c%), the trigger detection means included in the maximum value / minimum value detection means 23 will reduce this decrease. Detect and activate the sampling function (S15).

  Then, the maximum value / minimum value detecting means 23 samples the three input digital signals a predetermined number of times within the predetermined time range in the region 3 described above, and buffers the data relating to the received light amount level (S16).

  Thereafter, the maximum value / minimum value detecting means 23 detects the maximum value and the minimum value of the amount of received light based on the buffered data, and outputs them to the determination criterion setting means 24 (S17).

  Next, when the worker performing the inspection operation inputs the values of a% and b%, which are allowable values, in accordance with the size and type of the electric wire 1 to be inspected or the bending correction level (S18), the determination criterion setting means 24 Determination criteria (allowable range) as shown in FIG. 4 are set (S19).

  Thereby, the setting of the determination standard (allowable range) is completed, and the product inspection can be started by sequentially supplying the electric wires of the products to be inspected.

  When the product is inspected, the electric wire 1 to be inspected is supplied as shown in S21 of the flowchart of FIG.

  Then, when the core wire 2 blocks the optical path of the laser light, the received light amount level represented by the three digital signals input to the maximum / minimum value detecting means 23 should drop rapidly (region 2 in the graph of FIG. 8). ).

  However, in the determination step of S22, if it is determined that the decrease in the received light amount level is smaller than the predetermined value (c%), there is a possibility that an abnormality has occurred in the inspection apparatus 100. The setting operation is stopped, and the process proceeds to S24 to inspect the inspection apparatus 100.

  When the inspection of the inspection apparatus 100 is completed, the electric wire 1 to be inspected is supplied.

  On the other hand, if it is determined in step S22 that the decrease in the amount of received light is greater than a predetermined value (c%), the trigger detection means included in the maximum value / minimum value detection means 23 reduces this decrease. Detect and activate the sampling function (S25).

  Then, the maximum value / minimum value detection means 23 samples the three input digital signals a predetermined number of times within the predetermined time range in the region 3 described above, and buffers the data regarding the received light amount level (S26).

  Then, the maximum value / minimum value detection means 23 detects the maximum value and the minimum value of the amount of received light based on the buffered data (S27), and outputs them to the determination means 25.

  Then, the determination unit 25 determines the maximum value and the minimum value of the amount of received light input from the maximum value / minimum value detection unit 23 (S28), and if it is within the determination standard (allowable range), it passes a pass determination signal. Output (S29), and if it is not within the determination criteria (allowable range), output a failure determination signal (S30).

  At this time, as shown in FIGS. 9 to 12, a plurality of core wires 2 are configured by the laser beams irradiated along the optical axes 16, 17 and 18 from the laser beam irradiation means 15 a, 15 b and 15 c, respectively. It is possible to detect the presence or absence of missing wires.

  Specifically, as shown in FIG. 9, the first rotation means 30 and the second rotation means 40 have not yet been operated, and the relative angle θ between the core wire 2 and the apparatus main body 10 is 0 degree. In this state, by detecting the light shielding width 2 of the laser beam along the optical axis 17, it is possible to detect the loss of the strands 2a and 2b '(circled).

  Similarly, by detecting the light blocking width 3 of the laser light along the optical axis 18, it is possible to detect the loss of the strands 2a 'and 2b.

  However, since the uppermost strand 2c and the lowermost strand 2d overlap with the central strand in the direction of the optical axis 16, the defect cannot be detected (marked with x).

  Therefore, while detecting the relative angle using each rotary encoder, the first rotating means 30 and the second rotating means 40 are operated in opposite directions, respectively, and the core wire 2 and the apparatus main body as shown in FIG. Even if the relative angle θ with respect to 10 is set to 10 degrees, the strands 2c and 2d overlap with the central strand and other strands in the direction of the optical axis 16, so that the defect cannot be detected.

  Accordingly, the first rotating means 30 and the second rotating means 40 are further operated, and when the relative angle θ between the core wire 2 and the apparatus main body 10 is 20 degrees as shown in FIG. By detecting the light-shielding width 2 of the laser beam along the optical axis 17, it approaches the state in which the presence or absence of the strands 2 c and 2 d can be detected, but the overlap with the strands 2 a and 2 b ′ is large and the detection accuracy is low. .

  Further, when the first rotating means 30 and the second rotating means 40 are operated and the relative angle θ between the core wire 2 and the apparatus main body 10 is 30 degrees as shown in FIG. By detecting the light shielding width 2 of the laser light along, it is possible to reliably detect whether or not the strands 2c and 2d are missing.

  Further, by detecting the light shielding width 1 of the laser light along the optical axis 16, it is possible to reliably detect the presence or absence of the strands 2a and 2b '.

  Similarly, by detecting the light blocking width 3 of the laser light along the optical axis 18, it is possible to reliably detect the presence or absence of the strands 2a ′ and 2b.

  The relative angular position between the core wire 2 and the apparatus main body 10 when the electric wire 1 has been transported to a predetermined position is between the angular position shown in FIG. 9 and the angular position shown in FIG. It is in.

  As a result, by operating the first and second rotating means 30 and 40 in both forward and reverse directions, it is possible to detect the presence / absence of the defect of all the strands constituting the core wire 2.

  Further, when the electric wire 1 has been transported to a predetermined position and the relative angular position between the core wire 2 and the apparatus main body 10 is in the state shown in FIG. , It is possible to detect the presence or absence of defects in all the strands.

  That is, in the core wire inspection apparatus 100 of the first embodiment, the core wire 2 is inspected using the three laser beams irradiated along the optical axes 16, 17, 18. By using the second rotating means 40 to change the relative angle θ between the core wire 2 and the apparatus main body 10 within a range of 0 degrees to 30 degrees, a plurality of strands constituting the core wire 2 are lost. Presence / absence can be reliably detected.

  Further, in the core wire inspection apparatus 100 of the first embodiment, the apparatus main body 10 and the core wire 2 are rotated in opposite directions by using both the first rotation means 30 and the second rotation means 40. The time required for changing the relative angle θ between the core wire 2 and the apparatus main body 10 from 0 degrees to 30 degrees can be shortened.

  On the other hand, if only one of the first rotating means 30 or the second rotating means 40 is used, the structure of the entire apparatus can be simplified.

Modified Example Next, a modified example of the core wire inspection device 100 of the first embodiment will be described with reference to FIG.

  The core wire inspection device 110 of this modification is obtained by adding a core wire positioning means 50 for positioning the tip of the core wire 2 coaxially with the axis of the core wire 2 to the core wire inspection device 100 of the first embodiment.

  The core wire positioning means 50 includes a positioning member 51 that engages with the tip of the core wire 2 inside the gap 12 of the apparatus main body 10, and an actuator (not shown) that reciprocates the positioning member 51 in the axial direction of the core wire 2. have.

  The positioning member 51 has a conical inner wall surface 51a that expands toward the core wire 2 side. When the positioning member 51 is displaced to the core wire 2 side by the actuator, the tip of the core wire 2 is received and the core wire 2 is received. Position it so that it is coaxial with the axis.

  In addition, since the positioning member 51 is slidably engaged with the tip of the core wire 2, the rotation of the core wire 2 is not hindered.

  Further, the positioning member 51 can be supported by the upper arm portion 11b or the lower arm portion 11c of the apparatus body 10 so as to be slidable in the axial direction of the core wire 2.

  As a result, when the positioning member 51 of the core wire positioning means 50 is displaced toward the core wire 2 and is engaged with the tip thereof, the tip of the core wire 2 is also positioned coaxially with the support shaft 31, so The inspection accuracy can be improved by preventing rotation.

2nd Embodiment Next, with reference to FIGS. 14-17, the core wire test | inspection apparatus of the electric wire terminal part of 2nd Embodiment is demonstrated.

  The core wire inspection apparatus 100 according to the first embodiment described above has a structure in which the core wire 2 is inspected using three laser beams irradiated along the optical axes 16, 17, and 18, respectively.

  On the other hand, the core wire inspection apparatus 200 according to the second embodiment has a structure in which the core wire 2 is inspected using only one laser beam irradiated along the optical axis 16.

  Along with this, in order to detect the presence or absence of all the strands constituting the core wire 2, it is necessary to increase the relative rotation angle between the core wire 2 and the device main body 10. The overall structure can be simplified.

  More specifically, when the electric wire 1 has been transported to a predetermined position, the optical axis 16 when the relative angular position between the core wire 2 and the apparatus main body 10 is in the state shown in FIG. Focusing only on the laser light emitted along the optical axis 16, since all the strands overlap in the direction of the optical axis 16, depending on the laser light emitted by the optical axis 16, it is possible to detect the presence or absence of the strands. I can't.

  Therefore, for example, the apparatus main body 10 is rotated counterclockwise using only the first rotating means 30, and the relative rotation angle θ between the core wire 2 and the apparatus main body 10 is set to 10 degrees as shown in FIG. Then, by detecting the light shielding width 1 of the laser light along the optical axis 16, it is possible to detect the presence / absence of defects in the strands 2a and 2b ′.

  On the contrary, when the apparatus body 10 is rotated clockwise and the relative rotation angle θ between the core wire 2 and the apparatus body 10 is −10 degrees (not shown), the laser along the optical axis 16 is obtained. By detecting the light blocking width 1, it is possible to detect the presence or absence of defects in the strands 2a 'and 2b.

  However, in order to detect the presence or absence of the defects of the strands 2c and 2d by the laser light irradiated by the optical axis 16, the apparatus body 10 is further rotated counterclockwise as shown in FIGS. The relative rotation angle θ between the core wire 2 and the apparatus main body 10 needs to be 70 degrees. Therefore, when the apparatus main body 10 is rotated counterclockwise and the relative rotation angle θ between the core wire 2 and the apparatus main body 10 is set to 70 degrees as shown in FIG. 17, the presence or absence of the broken wires 2c and 2d is determined. Can be detected.

  That is, in the core wire inspection apparatus 200 of the second embodiment, the first and second rotating means 30 and 40 are used to detect the presence or absence of all the strands constituting the core wire 2. Thus, by detecting the relative angle θ between the core wire 2 and the apparatus main body 10 in the range of −10 degrees to 70 degrees, the presence or absence of a plurality of strands constituting the core wire 2 can be reliably detected. Can do.

  Therefore, although the inspection time required for detecting the presence or absence of defects of all the strands constituting the core wire 2 becomes long, since only one laser beam along the optical axis 16 is used, the structure of the apparatus main body 10 Can be simplified.

3rd Embodiment Next, with reference to FIG. 18, the core wire test | inspection apparatus of the electric wire terminal part of 3rd Embodiment is demonstrated.

  The core wire inspection apparatus 300 according to the third embodiment shown in FIG. 18 inspects the presence / absence of a strand by irradiating a twisted core wire with a laser beam. The apparatus main body 10 is fixed to the apparatus, and a core displacing means 60 that sandwiches the core 2 and reciprocates in the axial direction thereof.

  The core wire displacing means 60 includes a pair of upper and lower clamping members 61a and 61b capable of clamping the vicinity of the core wire 2 of the electric wire 1 in the vertical direction, and a pair of upper and lower clamp members 61a and 61b that contact and separate in the vertical direction. Actuators 62a and 62b, and an actuator 63 for reciprocally displacing the core wire 2 (electric wire 1) in the axial direction thereof are provided.

  When the core wire 2 (electric wire 1) to be inspected is conveyed forward and reaches a predetermined position and stops, the pair of upper and lower actuators 62a and 62b are operated to bring the pair of upper and lower clamping members 61a and 61b closer to each other. Is held vertically.

  Next, when the actuator 63 is activated, the core wire 2 (electric wire 1), the pair of upper and lower clamping members 61a and 61b, and the pair of upper and lower actuators 62a and 62b are integrally displaced toward the apparatus main body 10 side.

  Accordingly, the three laser beams (FIG. 2) irradiated along the optical axes 16 to 18 by the laser beam irradiation means 15a, 15b, and 15c of the apparatus main body 10 pass through the core wire 2 from the distal end side to the proximal end side. It will be irradiated in order.

  The three laser beams that irradiate the core wire 2 have a width in the front-rear direction of about 5 mm, which is a subject of inspection, which is sufficiently larger than the diameter of the core wire, and a thickness in the left-right direction of about 0.3 mm. Irradiation as a thin cross-sectional shape.

  Moreover, the some strand which comprises the core wire 2 to which the twist is applied has extended spirally around the axis line of the core wire 2, respectively.

Thereby, the relative angular position between the strand of the core wire 2 irradiated with the laser beam and the apparatus main body 10 is such that the portion irradiated with the laser beam is from the distal end side to the proximal end side of the core wire 2. Therefore, since the relative angular position of the optical axes 16, 17, 18 of the three laser beams and the core wire 2 changes as shown in FIGS. 9 to 12, the core wire 2 is configured. It is possible to reliably detect the presence / absence of a defect in each element wire.

  The core wire inspection device 300 of the third embodiment is intended for inspection of the core wire 2 that has been twisted in advance, and means for twisting the core wire 2 is provided in parallel with the core wire inspection device 300 and the core wire. It is also possible to inspect after twisting 2.

  As mentioned above, although each embodiment of the test | inspection apparatus of the electric wire terminal processing part which concerns on this invention was described in detail, it cannot be overemphasized that this invention is not limited by embodiment mentioned above and a various change is possible.

  For example, in the first embodiment and the third embodiment described above, the angles formed by the optical axes 16, 17, and 18 of the three laser beams are 45 degrees, respectively, for example, 37.5 degrees to 52.5 degrees Similar effects can be obtained using other angles in the range.

  Further, in addition to the three laser beams, for example, if a fourth laser beam irradiated along the optical axis that forms an angle of 67.5 degrees with respect to the optical axis 16 is used, the core wire 2 and the apparatus main body 10 The inspection can be completed at a stage where the relative angle between them is smaller.

The side view which shows the core wire test | inspection apparatus of 1st Embodiment. The front view of the apparatus main body shown in FIG. The block diagram which shows the structure of the apparatus main body shown in FIG. The graph figure which shows the change of the signal level when a non-defective product is inspected, and the setting of the allowable range. The flowchart which shows the procedure which correct | amends the level of received light quantity. The flowchart which shows the procedure which sets an allowable range. The flowchart which shows the procedure of product inspection. The graph figure which shows the change of the signal level obtained from each light receiver in the case of product inspection. The figure which shows the relationship of the angle position of the irradiation angle of a laser beam, and a core wire. The figure which shows the relationship of the angle position of the irradiation angle of a laser beam, and a core wire. The figure which shows the relationship of the angle position of the irradiation angle of a laser beam, and a core wire. The figure which shows the relationship of the angle position of the irradiation angle of a laser beam, and a core wire. The side view which shows the modification of the core wire test | inspection apparatus of 1st Embodiment. The figure which shows the relationship of the angle position of the irradiation angle of a laser beam, and a core wire in the core wire inspection apparatus of 2nd Embodiment. The figure which shows the relationship of the angle position of the irradiation angle of a laser beam, and a core wire. The figure which shows the relationship of the angle position of the irradiation angle of a laser beam, and a core wire. The figure which shows the relationship of the angle position of the irradiation angle of a laser beam, and a core wire. The side view which shows the core wire test | inspection apparatus of 3rd Embodiment. The figure which shows the test | inspection apparatus currently disclosed by Unexamined-Japanese-Patent No. 6-225423. The graph which shows the change of the voltage signal obtained in the inspection apparatus of FIG. The figure which shows the various defects of an electric wire terminal process. The figure which shows the problem in the inspection apparatus of FIG. The figure which shows the problem in the inspection apparatus of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric wire 2 Core wire 3 Light emitter 4 Light receiver 5 Light receiving surface 6 Slit 13 Laser light generation means 14 Laser light irradiation means 15 Laser light equal distribution means 16, 17, 18, Optical axis 20 Control part 21 Signal level adjustment means 22 Correction means 23 maximum value / minimum value detection means 24 determination reference setting means 25 determination means 26 determination level input means 30 first rotation means 31 support shaft 40 second rotation means 41 clamping member 42 support member 43 actuator 44 servo motor 50 Core wire positioning means 51 Positioning member 60 Core wire displacing means 61 Holding member 62 Actuator 63 Actuator 100 Core wire inspection device 110 of wire terminal portion of the first embodiment Wire core portion inspection device 200 of the wire end portion of the modified example Electric wire terminal portion of the second embodiment Core wire inspection apparatus 300 Core wire of electric wire terminal portion of third embodiment査 equipment

Claims (6)

An apparatus for inspecting the core wire by irradiating the exposed core wire by removing the insulation coating of the electric wire terminal portion,
Laser light irradiation means for irradiating laser light toward the core wire;
Laser light receiving means for receiving the laser light irradiated from the laser light irradiation means and outputting a detection voltage corresponding to the received light amount;
A determination unit that determines the quality of the core wire based on a received light amount corresponding to a detection voltage obtained from the laser light receiving unit and a determination criterion;
Relative turning means for relatively turning the laser light irradiation means and the laser light receiving means and the core wire around an axis of the core wire;
An apparatus for inspecting a core wire of an electric wire terminal portion, comprising: The relative rotation means is
A first rotating means for integrally rotating the laser light irradiation means and the laser light receiving means around an axis of the core wire;
The core wire inspection device for an electric wire terminal portion according to claim 1. The relative rotation means is
A second rotating means for rotating the core wire around its axis;
The core wire inspection device for an electric wire terminal part according to claim 1 or 2. The laser light irradiation means has a plurality of laser light irradiation units arranged in parallel in the circumferential direction of the axis, each irradiating laser light from a plurality of directions perpendicular to the axis of the core.
The laser light receiving means has a plurality of laser light receiving parts that respectively receive the laser light irradiated from the plurality of laser light irradiation parts,
The core wire inspection device for an electric wire terminal portion according to any one of claims 1 to 3. Core wire determining means for positioning the tip of the core wire coaxially with the axis of the core wire ;
The core determining means is
A positioning member that has a conical inner wall surface that widens toward the side of the core wire, and engages the tip of the core wire to position the tip of the core wire coaxially with the axis of the core wire.
An actuator for reciprocating the positioning member in the axial direction of the core wire;
The core wire inspection device for an electric wire terminal portion according to any one of claims 1 to 4, characterized by comprising: An apparatus for inspecting the core wire by irradiating a twisted core wire after removing the insulation coating of the electric wire terminal portion and exposing the wire,
Laser light irradiation means for irradiating laser light toward the core wire;
Laser light receiving means for receiving the laser light irradiated from the laser light irradiation means and outputting a detection voltage corresponding to the received light amount;
A determination unit that determines the quality of the core wire based on a received light amount corresponding to a detection voltage obtained from the laser light receiving unit and a determination criterion;
An apparatus for inspecting a core wire of an electric wire terminal section, comprising: a core wire displacement means for moving the core wire in the axial direction thereof.

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