JP2008295209A - Wire peeler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire peeler having a function with which it can be correctly detected that a core wire was flawed when a peeling edge made a cut in the coating of a coated wire. <P>SOLUTION: The wire peeler 8 removes the coating 12a at an end of an electric wire 12 cut to a predetermined length. The peeler includes: a pair of cutting blades 93; a pair of first peeling edges 95 that make a cut in the coating 12a of the electric wire 12; a removing means that moves the pair of first peeling edges 95 along the moving direction K and thereby pulls and peels the coating 12a at the end to remove it; and a microprocessor 32 that applies voltage to between the core wire 12b of the electric wire 12 and the pair of first peeling edges 95. During a period from when the pair of first peeling edges 95 start moving in the direction in which they come close to each other to when the removing means starts driving, the microprocessor determines whether or not voltage has been applied to between the core wire 12b and the pair of first peeling edges 95. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a wire stripping device used in a manufacturing process of a wire harness.

  Various electronic devices are mounted on automobiles or the like as moving bodies. For this reason, the automobile or the like is wired with a wire harness in order to transmit electric power from a power source or the like or a control signal from a computer or the like to the electronic device. This wire harness has a plurality of covered electric wires and connectors attached to the ends of the covered electric wires. The said covered electric wire has the core wire comprised by twisting the some strand comprised with an electroconductive metal, and the insulating coating | coated part which coat | covers this core wire. The connector includes a terminal fitting and a connector housing that accommodates the terminal fitting. The terminal fitting is made of conductive sheet metal or the like, and is attached to the end of the covered electric wire to be electrically connected to the core wire of the covered electric wire. In the wire harness having such a configuration, when the connector housing is coupled to the electronic device or the like, each covered electric wire is electrically connected to the electronic device via the terminal fitting, and the electronic device has a required Communicate power and signals.

  When assembling the wire harness, first, a long covered electric wire wound around a reel is measured and cut to a predetermined length, and then the covering portion at the end of the covered electric wire is removed (skin And then attach the terminal fitting. Thereafter, the terminal fitting is inserted into the connector housing. Thus, the wire harness described above is assembled.

  Further, when removing the covering portion at the end of the covered electric wire (peeling off), the covered electric wire is sandwiched between a pair of peeling blades, and the covering portion has a depth that does not reach the core wire. A notch is made and the pair of skinning blades are moved along the longitudinal direction of the covered electric wire to peel off the covering portion at the end of the covered electric wire. However, the peeling blade may reach the core wire due to a dimensional error or the like, and the core wire may be damaged.

  Therefore, in the past, an arbitrary number was selected from the stripped coated wires, and the selected coated wires were further stripped by hand, and the presence or absence of this core wire was visually confirmed using a magnifier. It was. However, these manual skinning operations and visual confirmation operations are very time-consuming operations and have been a heavy burden on workers. In addition, there is a possibility that the visual check may be missed. Furthermore, the covered electric wire used for the sampling inspection cannot be shipped as a product because it has been subjected to the second stripping process described above, resulting in a loss.

Therefore, as a solution to the problem caused by the sampling inspection, a voltage is applied between the core wire and the pair of stripping blades, and the core wires and the stripping blades are electrically connected, so that the core wires are damaged. Japanese Patent Application Laid-Open No. H10-228707 devised a coating layer removing device that determines that the motor has occurred and stops the driving of the motors.
JP-A-2-21115

  However, the coating layer removing apparatus described in Patent Document 1 has the following problems. That is, as described above, when the covering portion at the end of the covered electric wire is peeled off, if the covered electric wire is bent, the pair of peeling blades are moving along the longitudinal direction of the covered electric wire. , It may come into contact with the core wire of this covered electric wire, that is, it may slide. The contact at this time is not a contact that damages the core wire, that is, a defective product, but the driving of the device stops even with such a light contact, so that the production efficiency is improved. There was a problem of being lowered. Moreover, since this coating layer removing apparatus determines that the core wire has been damaged by electrical processing, there is a problem that it is difficult to detect even if a failure or abnormality occurs in this apparatus.

  Therefore, the present invention pays attention to the above-described problems, and provides an electric wire peeling apparatus having a function capable of accurately detecting that the peeling blade has damaged the core wire when making a cut into the covered portion of the covered electric wire. The purpose is to provide.

  In order to achieve the above object, the invention described in claim 1 is a pair of stripping blades that sandwich a covered electric wire having a core wire and a covering portion that covers the outer periphery of the core wire, and make cuts in the covering portion. And the portion on the end side along the longitudinal direction of the covered electric wire with respect to the portion cut by the pair of peeled blades of the covered portion, the covered electric wire and the pair of peeled blades A removing means for peeling and removing by relatively moving along the longitudinal direction of the covered electric wire, a voltage is applied between the core wire of the covered electric wire and the pair of skinning blades, and the core wire and the pair of A continuity detection unit that detects that a voltage is applied between the skinning blades and the pair of skinning blades starting to move in a direction approaching each other until the removal means starts driving. The core wire and the pair of skinning blades It is wire peeling device according to claim in which the voltage has a determining controller whether applied, to the.

  The invention described in claim 2 is the invention described in claim 1, further comprising a pair of cutting blades that sandwich the covered electric wire between each other and cut the covered electric wire, A voltage is applied between the core wire of the covered electric wire and the pair of cutting blades, and it is detected that a voltage is applied between the core wire and the pair of cutting blades. Whether or not a voltage is applied between the core wire and the pair of cutting blades at the time of cutting is determined.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the control unit is configured so that the core wire and the pair of the core wire and the pair are stopped during a period from when the removing unit starts driving. It is determined whether or not a voltage is applied between the skinning blades and whether or not the number of times the voltage is applied between the core wire and the pair of skinning blades exceeds a specified number However, a warning is output when the specified number of times is exceeded.

  According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the control unit may be configured such that the core wire and the pair are between the start and the stop of the removing unit. It is determined whether or not a voltage is applied between the skinning blades and whether or not the total time during which the voltage is applied between the core wire and the pair of skinning blades exceeds a specified time. The judgment is made and a warning is output when a prescribed time is exceeded.

  According to the first aspect of the present invention, the control unit starts the movement in the direction in which the pair of skinning blades approach each other and then the removal means starts to drive the core wire and the pair of skinning blades. Therefore, it is determined whether or not a voltage is applied between the two and the end of the covering portion on the end side, that is, the covered wire and the pair of peeling blades are relatively moved along the longitudinal direction of the covered wire. Even when the pair of skinning blades are in contact with the core wire during movement, the determination of the control unit is not affected. Accordingly, it is possible to provide an electric wire stripping device that can accurately detect that the core strip has been damaged when the stripping blade cuts into the covering portion.

  According to the invention described in claim 2, since the control unit determines whether or not a voltage is applied between the core wire and the pair of cutting blades when cutting the covered electric wire, no voltage is applied. Therefore, it is possible to find an abnormality in the wire stripping device.

  According to the invention described in claim 3, the control unit determines whether or not a voltage is applied between the core wire and the pair of peeling blades after the removal unit starts driving and stops. In addition to determining, it is determined whether the number of times the voltage has been applied between the core wire and the pair of skinning blades exceeds the specified number, and a warning is output when the number exceeds the specified number. When the electric wire and the pair of peeling blades are relatively moved along the longitudinal direction of the covered electric wire, it can be recognized that the pair of peeling blades are intermittently in contact with the core wire.

  According to the invention described in claim 4, the control unit determines whether or not a voltage is applied between the core wire and the pair of skinning blades after the removal unit starts driving and stops. As well as determining, it is determined whether or not the total time when the voltage is applied between the core wire and the pair of skinning blades exceeds a specified time, and a warning is output when the specified time is exceeded, When the covered electric wire and the pair of peeled blades are relatively moved along the longitudinal direction of the covered electric wire, it can be recognized that the pair of peeled blades are in contact with the core wire for a certain time or more. . Further, since the degree of contact can be determined from the total time that the pair of skinning blades are in contact with the core wire, the interval and the mounting position between the pair of skinning blades can be finely adjusted.

  Hereinafter, an electric wire peeling apparatus according to an embodiment of the present invention and a wire harness manufacturing apparatus 1 having the electric wire peeling apparatus will be described with reference to FIGS. 1 to 3. Moreover, FIG. 1 is a block diagram which shows one Embodiment of the wire harness manufacturing apparatus of this invention. FIG. 2 is a cross-sectional view for explaining the moving range of the cutting blade, the first peeling blade, and the second peeling blade of the wire peeling device that constitutes the wire harness manufacturing apparatus shown in FIG. (A) is a figure which shows the state by which the cutting blade, the 1st peeling blade, and the 2nd peeling blade were located in the open position, (b) is a cutting blade and the 1st peeling blade And (c) is a diagram showing a state in which the second peeling blade is positioned at the first closed position, and (c) shows that the cutting blade, the first peeling blade, and the second peeling blade are in the second closed position. It is a figure which shows the state positioned in the position. FIG. 3 is a flowchart showing processing performed by the CPU according to a control program stored in a ROM of a microprocessor as a control unit constituting the wire harness manufacturing apparatus shown in FIG.

  As shown in FIG. 1, the wire harness manufacturing apparatus 1 of the present embodiment pays out the covered electric wire 12 wound around the electric wire reel 2, corrects the bent wrinkles, cuts the wire to a predetermined length, and cuts the covered electric wire. This is an apparatus for removing the covering portion at the end of the electric wire 12.

  The said covered electric wire 12 comprises the wire harness routed by the motor vehicle etc. as a moving body. The covered electric wire 12 has a conductive core wire 12b (see FIG. 2) and an insulating covering portion 12a (see FIG. 2) covering the core wire 12b. The core wire 12b is formed by spirally twisting a plurality of strands made of conductive metal. The covering portion 12a is made of, for example, a synthetic resin such as polyvinyl chloride (PVC). The covered electric wire 12 having such a configuration constitutes the above-described wire harness with a connector or the like attached to an end portion or the like. In the wire harness, that is, the covered electric wire 12, the connector is connected to a connector of various electronic devices such as an automobile and transmits various signals and electric power to the electronic devices. Moreover, the said covered electric wire 12 is only called the electric wire 12 below.

  The wire harness manufacturing apparatus 1 includes an electric wire reel 2, a moving device 5 that moves an electric wire 12 wound around the electric wire reel 2 along its longitudinal direction, and an electric wire that is arranged between the electric wire reel 2 and the moving device 5. A straightening device 4 that corrects 12 bending wrinkles, a ring-shaped holding portion 11 that is arranged between the electric wire reel 2 and the straightening device 4 and holds the electric wire 12 that is fed out from the electric wire reel 2, and an electric wire Based on the joint detector 6 that detects the joint of the electric wire 12 wound around the reel 2, the encoder 7 that measures the amount of movement of the electric wire 12, and the amount of movement measured by the encoder 7 that is arranged downstream of the encoder 7. The wire stripping device 8 that cuts the electric wire 12 to a predetermined length, removes the covering portions 12a at both ends along the longitudinal direction of the cut electric wire 12, and exposes the core wire 12b, and these It has a frame 10 installed on the floor of a factory for fixing the main device 4, moving device 5, joint detector 6, encoder 7, and a control device 3 that controls the entire wire harness manufacturing device 1. .

  The electric wire reel 2 is formed in a cylindrical shape, and the electric wire 12 is wound around the outer peripheral surface thereof. Further, the electric wire 12 wound around the electric wire reel 2 constitutes one long electric wire 12 by connecting the core wires 12b of the plural electric wires 12 to each other. Moreover, in this specification, the part by which the electric wires 12 were joined together is called a joint part.

  The moving device 5 has a pair of rotating belts 51 that are rotated by a plurality of rotating rollers 53 arranged along the moving direction of the electric wires 12. The pair of rotating belts 51 sandwiches the electric wire 12 therebetween and rotates in the reverse direction to move the electric wire 12 along a direction indicated by an arrow K in FIG. 1 (hereinafter referred to as a moving direction K). Then, the electric wire 12 is drawn out from the electric wire reel 2 by being pulled by the moving device 5. The driving of the moving device 5 is controlled by a microprocessor 32 described later of the control device 3.

  The straightening device 4 includes a first straightening device 41 and a second straightening device 42 arranged along the moving direction K of the electric wire 12. The first straightening device 41 and the second straightening device 42 are arranged in a zigzag pattern along the moving direction K, and a plurality of rollers that straighten the bending of the wire 12 by passing the wire 12 therebetween. 43 and 44, respectively. Thus, when the electric wire 12 passes the 1st correction apparatus 41 and the 2nd correction apparatus 42, the electric wire 12 by which the bending wrinkle was corrected and was extended linearly is obtained.

  The joint detection unit 6 includes a pair of rollers 61 that pass the electric wire 12 therebetween, and a power source (not shown) that applies a voltage between the pair of rollers 61. The joint detection unit 6 is configured such that a voltage is applied between the pair of rollers 61 when the core wire 12b of the wire 12 passes between the pair of rollers 61 and contacts the pair of rollers 61. To detect. In addition, the joint detection unit 6 is connected to a later-described microprocessor 32 of the control device 3, and transmits a signal toward the microprocessor 32 when detecting the joint portion of the electric wire 12.

  The encoder 7 has a pair of rotors 71. The outer peripheral surface of the rotor 71 is in contact with the outer surface of the electric wire 12 moved along the moving direction K, and rotates around the axis as the electric wire 12 moves along the moving direction K. The encoder 7 is connected to a later-described microprocessor 32 of the control device 3. The encoder 7 transmits a pulse signal to the microprocessor 32 when the rotor 71 rotates by a predetermined angle. That is, the encoder 7 transmits information corresponding to the amount of movement of the electric wire 12 along the movement direction K toward the microprocessor 32. Further, the microprocessor 32 drives the rotating roller 53 and the wire stripping device 8 of the moving device 5 based on the moving amount information of the electric wire 12 transmitted from the encoder 7.

  The wire stripping device 8 includes a pair of cutting blades 93, a pair of first stripping blades 95, a pair of second stripping blades 94, one cutting blade 93, and one first stripping. A blade 95, a lower member 87 to which one second skinning blade 94 is attached, an upper member 88 to which the other cutting blade 93, the other first skinning blade 95, and the other second skinning blade 94 are attached. A support portion 86 that freely supports the lower member 87 and the upper member 88 at positions facing each other along the vertical direction (refers to approaching or moving away), and the lower member 87 to the upper side. A servo motor 91 to be brought into contact with and separated from the member 88; a screw shaft 90 connected to the output shaft of the servo motor 91; a slider 89 attached to the lower member 87 and moving on the screw shaft 90; A bay with a servo motor 91 attached. 82, a servo motor 85 that reciprocates the base 82 in the movement direction K, a screw shaft 84 connected to the output shaft of the servo motor 85, and a slider 83 that is attached to the base 82 and moves on the screw shaft 84. And a pedestal 81 to which a base 82 and a servo motor 85 are attached.

  Further, as shown in FIG. 2, the pair of cutting blades 93, the pair of first skinning blades 95, and the pair of second skinning blades 94 are paired blades 93, 95, 94. A pair of first peeling blades 95, a pair of cutting blades 93, and a pair of second peeling blades 94 are arranged in order along the movement direction K while being opposed to each other along the vertical direction. . Further, the distance between the pair of cutting blades 93 is formed to be narrower than the distance between the pair of first skinning blades 95 and the pair of second skinning blades 94. The distance between the pair of first skinning blades 95 and the distance between the pair of second skinning blades 94 are formed to be equal. Moreover, the electric wire 12 is positioned between the pair of blades 93, 95, 94 by being sent to the moving device 5.

  Further, the blades 93, 95, and 94 are moved from the “open position” shown in FIG. 2A to the “first closed position” shown in FIG. Then, it moves from the “first closed position” shown in FIG. 2B to the “second closed position” shown in FIG. Further, the servo motor 91 described above rotates in reverse to move from the “second closed position” shown in FIG. 2C to the “open position” shown in FIG.

  In the “open position” shown in FIG. 2A, none of the blades 93, 95, 94 is in contact with the electric wire 12. Further, in the “first closed position” shown in FIG. 2B, the pair of cutting blades 93 are positioned so as to overlap each other, and the electric wire 12 is cut by the pair of cutting blades 93. In the “first closed position”, the pair of first skinning blades 95 and the pair of second skinning blades 94 do not contact the electric wires 12. Further, in the “second closed position” shown in FIG. 2C, the covering portion has a depth just before the pair of first peeling blades 95 and the pair of second peeling blades 94 reach the core wire 12b. It is stuck in 12a.

  The electric wire stripping device 8 having the above-described configuration is configured such that the blades 93, 95, and 94 move from the “open position” shown in FIG. 2A to the “first closed position” shown in FIG. The cutting blade 93 cuts the electric wire 12. Then, by moving from the “first closed position” shown in FIG. 2B to the “second closed position” shown in FIG. 2C, the pair of first peeling blades 95 and the pair of first The two skinning blades 94 pierce and cut into the covering portions 12a at both ends sandwiching the cut portions of the two electric wires 12 cut by the pair of cutting blades 93, respectively. That is, the pair of second skinning blades 94 of the electric wires 12 on the front side (corresponding to the right side in FIG. 2) along the moving direction K among the electric wires 12 cut into two by the pair of cutting blades 93. Cut into the rear edge along the moving direction K. In addition, the pair of first skinning blades 95 is the rear side of the electric wires 12 cut by the pair of cutting blades 93 (corresponding to the left side in FIG. 2) along the moving direction K. Cut into the front end along the moving direction K. As described above, the servo motor 91, the screw shaft 90, and the slider 89 move the blades 93, 95, and 94 in two stages.

  In addition, the pair of first skinning blades 95 and the pair of second skinning blades 94 are pierced into the covering portion 12a of the electric wire 12, that is, the blades 93, 95, 94 are shown in FIG. When the pair of first skinning blades 95 and the pair of second skinning blades 94 are moved along the movement direction K together with the base 82 in the state of being positioned at the “second closed position”, the covering portion The portion closer to the cut portion than the portion where the notch 12a is cut is removed by peeling to expose the core wire 12b. That is, peel off. That is, the servo motor 85, the screw shaft 84, and the slider 83 described above constitute the removing means described in the claims. The servo motors 91 and 85 are controlled by a microprocessor 32 described later of the control device 3.

  Further, the pair of cutting blades 93 and the pair of first skinning blades 95 are made of conductive metal, and a port 32d of a microprocessor 32 (to be described later) of the control device 3 via a support portion 86. And are electrically connected. The port 32d is also electrically connected to the terminal end 12c of the electric wire 12 wound around the electric wire reel 2. The pair of cutting blades 93 and the pair of first skinning blades 95 are electrically connected to a power source unit (not shown) of the wire stripping device 8, and voltage is supplied from the power source unit according to a command from the microprocessor 32. Is applied. Then, when the pair of cutting blades 93 or the pair of first skinning blades 95 come into contact with the core wire 12b of the electric wire 12, the pair of cutting blades 93, the pair of first skinning blades 95, the core wire 12b, and the port 32d. Are connected in series with the power supply section, and a voltage is applied to them.

  As shown in FIG. 1, the control device 3 includes a microprocessor (MPU: Micro Processing Unit) 32 as a continuity detecting unit and a control unit, a display unit 33 such as a liquid crystal display connected to the microprocessor 32, A nonvolatile memory (hereinafter abbreviated as EEPROM) 30 connected to the microprocessor 32 is included.

  The microprocessor 32 includes a CPU (Central Processing Unit) 32a, a ROM (Read-Only Memory) 32b, a RAM (Random Access Memory) 32c, and the port 32d described above. The RAM 32c has a data area for storing various data and a work area used for various processing operations. The ROM 32b has a control program for causing the CPU 32a to perform various processing operations, that is, the moving device 5 and the joint detection unit 6. , A control program for controlling driving of the encoder 7, the wire stripping device 8, and the like are stored.

  Further, the port 32d is electrically connected to the terminal end 12c of the electric wire 12 wound around the electric wire reel 2 and the support portion 86 of the electric wire stripping device 8 described above, and supports the core wire 12b of the electric wire 12 and support. When a voltage is applied between the portions 86, that is, the pair of cutting blades 93 and the pair of first skinning blades 95, the voltage level becomes HIGH. Further, the CPU 32a monitors the voltage change of the port 32d, and based on the voltage change of the port 32d, specifically, the voltage level of the port 32d is HIGH, so that the core wire 12b of the electric wire 12 is high. And the pair of cutting blades 93 and the pair of first skinning blades 95 are detected to be applied with a voltage, and the following processing is performed. Further, in this specification, the fact that the CPU 32a recognizes that the voltage level of the port 32d is HIGH is also expressed as “a continuity signal is input to the CPU 32a”.

  Next, processing performed by the CPU 32a according to the control program stored in the ROM 32b will be described with reference to the flowchart of FIG.

  First, in step S <b> 1, based on the movement amount of the electric wire 12 measured by the encoder 7, the starting end along the movement direction K of the electric wire 12 passes between the pair of second peeling blades 94 for a predetermined length. If the CPU 32a determines that the electric wire 12 has been set (Y in step S1), the CPU 32a stops the rotational driving of the rotating roller 53 of the moving device 5 and the servo motor 91 rotates forward. The drive is started and stopped when the servo motor 91 is rotated forward at a predetermined rotational speed. As a result, the lower member 87 is raised, the blades 93, 95, 94 are positioned from the open position to the first closed position, and the electric wire 12 is cut (step S2).

  In step S3, based on the voltage change of the port 32d, it is determined whether or not a continuity signal is input to the CPU 32a between the start and stop of rotation of the servo motor 91 in step S2, and it is determined that the continuity signal is input. Then (Y in Step S3), that is, when it is determined that the pair of cutting blades 93 are in contact with the core wire 12b of the electric wire 12 and a voltage is applied between the core wire 12b and the pair of cutting blades 93, the process proceeds to Step S4. If it is determined that the continuity signal has not been input (N in step S3), that is, if it is determined that an abnormality has occurred in the wire stripping device 8, the process proceeds to step S13, and after driving the wire harness manufacturing apparatus 1 is stopped, An error message is displayed on the display unit 33 (step S14).

  In step S4, the CPU 32a starts the forward rotation drive of the servo motor 91, and stops the servo motor 91 when the servo motor 91 is rotated forward. As a result, the lower member 87 is further raised, and the blades 93, 95, 94 are positioned from the first closed position to the second closed position, and the pair of first peeling blades 95 and the pair of second blades are positioned. Is peeled into the covering portion 12a of the electric wire 12 (step S4).

  In step S5, based on the voltage change of the port 32d, it is determined whether or not a continuity signal is input to the CPU 32a between the start and stop of rotation of the servo motor 91 in step S4. (Yes in Step S5), that is, if it is determined that the pair of first peeling blades 95 have pierced the core wire 12b of the electric wire 12 and the core wire 12b has been damaged, the process proceeds to Step S15, and the driving of the wire harness manufacturing apparatus 1 is performed. After the stop, a message indicating that the core wire 12b is damaged is displayed on the display unit 33 (step S16). If it is determined that the conduction signal has not been input (N in step S5), that is, if it is determined that the pair of first skinning blades 95 have pierced the covering portion 12a at a depth immediately before reaching the core wire 12b, step Proceed to S6.

  In step S6, the CPU 32a starts the forward rotation of the servo motor 85, and stops the servo motor 85 when the servo motor 85 is rotated forward. As a result, the base 82 moves to the rear side (left side in FIG. 1) along the moving direction K, and the moving direction K of the electric wires 12 in which the pair of second skinning blades 94 are cut into two. The covering portion 12a at the rear end of the front electric wire 12 along the line is removed. Subsequently, the CPU 32a starts the reverse rotation driving of the servo motor 85, and stops the servo motor 85 when the servo motor 85 is reversely rotated. As a result, the base 82 moves to the front side (right side in FIG. 1) along the movement direction K, and the pair of first peeling blades 95 in the movement direction K out of the two wires 12 cut into two. The covering portion 12a at the front end of the rear wire 12 along the line is removed.

  In step 7, based on the voltage change of the port 32d, it is determined whether or not a continuity signal is input to the CPU 32a between the start and stop of the reverse rotation of the servo motor 85 in step S6. If it is determined (N in step S7), that is, if it is determined that the pair of first skinning blades 95 has not slid on the surface of the core wire 12b, the process proceeds to step S8. If it is determined that a continuity signal has been input (Y in step S7), that is, if it is determined that the pair of first skinning blades 95 has slid on the surface of the core wire 12b, the process proceeds to step S11.

  In step S11, has the number of times the continuity signal has been input to the CPU 32a between the start and stop of the reverse rotation of the servo motor 85, that is, the number of times the pair of skinning blades 95 slid on the core wire 12b exceeded the specified number of times? If it is determined that the specified number of times has not been exceeded (N in step S11), the process proceeds to step S8. If it is determined that the specified number of times has been exceeded (Y in step S11), that is, if it is determined that the pair of first skinning blades 95 is sliding on the surface of the core wire 12b, the process proceeds to step S12, and the display unit A warning to the effect that the pair of first skinning blades 95 is sliding is displayed on 33. Thereafter, the process proceeds to step S8. In step S8, the servo motor 85 is rotated forward again to return the base 82 to the position before step S5.

  In step S9, the CPU 32a starts reverse rotation driving of the servo motor 91, and stops when the servo motor 91 is reversely rotated at a predetermined rotational speed. As a result, the lower member 87 is lowered, and the blades 93, 95, 94 are positioned from the second closed position to the open position.

  In step S10, the CPU 32a starts to rotate the rotation roller 53 of the moving device 5, and sends the electric wire 12 along the moving direction K by a predetermined length. Then, it returns to step S2 and repeats the process mentioned above.

  The wire harness manufacturing apparatus 1 having the above-described configuration pays out the electric wire 12 wound around the electric wire reel 2 as described below, corrects the bending wrinkles, and then cuts the wire 12 to a predetermined length to remove the covering portion 12a.

  First, as a preparation process, one end of the electric wire 12 wound around the electric wire reel 2 is connected between the holding unit 11, the plurality of rollers 43 of the first correction device 41, between the plurality of rollers 44 of the second correction device 42, and a joint. It passes between the pair of rollers 61 of the detector 6 and between the pair of rotors 71 of the encoder 7. Further, the blades 93, 95, 94 of the wire stripping device 8 are positioned at the open position.

  Here, the power supply of the wire harness manufacturing apparatus 1 is turned on, and the driving of the rotating roller 53 of the moving apparatus 5 is started. Then, a pair of rotating belts 51 that rotate in reverse to each other as the rotating roller 53 rotates sandwiches the electric wire 12 between them and moves the electric wire 12 along the moving direction K.

  Then, the electric wire 12 fed out by the moving device 5 passes between the rollers 43 and 44 of the correction device 4 and is wound around the electric wire reel 2 to correct the bent wrinkles.

  When the CPU 32a of the control device 3 determines that the starting end along the moving direction K of the electric wire 12 has passed between the pair of second skinning blades 94, the wire skinning device 8 is operated as described above.

  When the joint portion of the electric wire 12 is positioned between the pair of rollers 61 and 61 and a joint portion detection signal is transmitted from the joint detection portion 6 to the CPU 32a of the control device 3, the CPU 32a causes the electric wire stripping device 8 to Cut the 12 joints.

  By repeating such an operation, the electric wire 12 cut to a predetermined length and having the covering portions 12a at both ends removed is obtained. Each electric wire 12 thus cut to a predetermined length and from which the covering portions 12a at both ends are removed is moved to a terminal connection device provided downstream of the electric wire stripping device 8. And by this terminal connection apparatus, a terminal is crimped | bonded to the core wire 12b which was peeled and exposed.

  According to the present embodiment, the microprocessor 32 causes the core wire 12b and the pair of first skins to peel off until the pair of first skinning blades 95 move from the first closed position to the second closed position. Since it is determined whether or not a voltage is applied to the blade 95, during the operation of peeling off the covering portion 12a at the end, that is, the pair of first skinning blades 95 move along the movement direction K. When the pair of first skinning blades 95 come into contact with the core wire 12b (slid), the above-described determination of the microprocessor 32 is not affected. From this, it is possible to provide the wire stripping device 8 and the wire harness manufacturing device 1 capable of accurately detecting that the pair of first stripping blades 95 have damaged the core wire 12b when cutting the covering portion 12a. it can. Therefore, it is possible to prevent the electric wire 12 having a scratch on the core wire 12b from flowing out and to increase the production efficiency of the wire harness manufacturing apparatus 1.

  Further, since the microprocessor 32 determines whether or not a voltage is applied between the core wire 12b and the pair of cutting blades 93 when the electric wire 12 is cut, it is determined that no voltage is applied. Abnormalities of the wire stripping device 8 and the wire harness manufacturing device 1 can be found. Therefore, it is possible to reliably prevent the electric wire 12 having a scratch on the core wire 12b from flowing out.

  Moreover, by using the wire stripping device 8 described above, it is possible to inspect all the wires 12 without placing a burden on the operator, and to improve the product reliability of the wire 12 as a product, that is, the wire harness. . In addition, it is not necessary to perform a destructive inspection as in the prior art, and generation of lost wires can be suppressed.

  In addition, a voltage is applied between the core wire 12b and the pair of first skinning blades 95 after the pair of first skinning blades 95 starts to move along the movement direction K and stops. The microprocessor 32 outputs a warning when the number of times exceeds the specified number, so that the pair of first skinning blades 95 move along the movement direction K during the operation of peeling off the covering portion 12a at the end. It is possible to recognize that the pair of first skinning blades 95 are intermittently in contact with the core wire 12b, that is, slid. And when the said warning is output, by adjusting the space | interval and attachment position of a pair of 1st peeling blade 95, this pair of 1st peeling blade 95 contacts the core wire 12b. Can be improved.

  In the above-described embodiment, in step S11 shown in FIG. 3, has the number of times the continuity signal has been input to the CPU 32a, that is, the number of times the pair of skinning blades 95 slid on the core wire 12b exceeded the specified number of times? In the present invention, the pair of first skinning blades 95 and the pair of first skinning blades 95 between the start of the movement along the movement direction K and the stop thereof are stopped. It may be determined whether or not the total time during which the voltage is applied to one of the skinning blades 95 exceeds a predetermined time, and the microprocessor 32 outputs a warning when the predetermined time is exceeded. good. When the microprocessor 32 outputs a warning when the specified time is exceeded, the pair of first skinning blades 95 move in the movement direction K during the operation of peeling off the covering portion 12a at the end. It is possible to recognize that the pair of first skinning blades 95 are in contact with the core wire 12b for a certain period of time, that is, slid. Moreover, since the degree of this contact can be determined from the total time that the pair of first skinning blades 95 are in contact with the core wire 12b, the distance between the pair of first skinning blades 95 and the attachment position. Can be finely adjusted.

  In the above-described embodiment, the base 82 is moved along the movement direction K when the covering portion 12a at the end is removed. However, in the present invention, the electric wire 12 is moved along the movement direction K. You may make it move.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

It is a block diagram which shows one Embodiment of the wire harness manufacturing apparatus of this invention. It is sectional drawing for demonstrating the movement range of the cutting blade of the electric wire peeling apparatus which comprises the wire harness manufacturing apparatus shown by FIG. 1, a 1st peeling blade, and a 2nd peeling blade, (a). FIG. 4 is a view showing a state in which the cutting blade, the first peeling blade, and the second peeling blade are positioned in the open position, and (b) shows the cutting blade, the first peeling blade, and the second peeling blade; It is a figure which shows the state by which the peeling blade was located in the 1st closed position, (c) is a cutting blade, a 1st peeling blade, and a 2nd peeling blade being positioned in the 2nd closed position. FIG. It is a flowchart which shows the process which CPU performs according to the control program stored in ROM of the microprocessor as a control part which comprises the wire harness manufacturing apparatus shown by FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wire harness manufacturing apparatus 8 Wire stripping apparatus 12 Covered electric wire 12a Covering part 12b Core wire 32 Microprocessor (conduction detection part, control part)
83 Slider (removal means)
84 Screw shaft (removal means)
85 Servo motor (removal means)
93 Cutting blade 95 First peeling blade (peeling blade)

Claims (4)

A pair of stripping blades that sandwich a covered electric wire having a core wire and a covering portion that covers the outer periphery of the core wire, and cuts the covering portion;
The portion on the end portion side along the longitudinal direction of the covered electric wire with respect to the portion of the covered portion cut by the pair of peeled blades, the covered electric wire and the pair of peeled blades are connected to the covered electric wire. Removing means for peeling and removing by relatively moving along the longitudinal direction of
A continuity detecting unit that applies a voltage between the core wire of the covered electric wire and the pair of skinning blades, and detects that a voltage is applied between the core wire and the pair of skinning blades;
Whether or not a voltage is applied between the core wire and the pair of skinning blades after the pair of skinning blades starts moving in a direction approaching each other and until the removing means starts driving. A control unit for determining;
An apparatus for stripping an electric wire, comprising: Further comprising a pair of cutting blades that sandwich the covered electric wire between each other and cut the covered electric wire,
The continuity detecting unit detects that a voltage is applied between the core wire and the pair of cutting blades, and a voltage is applied between the core wire and the pair of cutting blades;
The wire stripping device according to claim 1, wherein the control unit determines whether a voltage is applied between the core wire and the pair of cutting blades when the covered electric wire is cut. The controller determines whether or not a voltage is applied between the core wire and the pair of skinning blades after the removal means starts driving and stops, and the core wire and the core The judgment is made as to whether or not the number of times the voltage is applied between the pair of skinning blades exceeds a prescribed number, and a warning is output when the prescribed number of times is exceeded. Item 3. A wire peeling apparatus according to Item 2. The controller determines whether or not a voltage is applied between the core wire and the pair of skinning blades after the removal means starts driving and stops, and the core wire and the core 2. A judgment is made as to whether or not the total time during which voltage is applied between the pair of skinning blades exceeds a specified time, and a warning is output when the specified time is exceeded. The wire peeling apparatus according to claim 2.

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