JP2008061459A - Wire stripper and stripping method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire stripper in which GO/NO-GO judgment can be made about the stripped state stably with low judgment error even for a thin wire or a wire with thin coating, and to provide a wire stripping method. <P>SOLUTION: The wire stripper 1 has first load cells 21 and 22, and second load cells 23 and 24. When the blades 7 and 8 cut a wire 10, the load cells 21 and 22 detect the cutting time load being applied to the wire 10. When the blades 7 and 8 are moved laterally to the terminal 10a side while cutting the coating 11, the load cells 23 and 24 detect the load during lateral movement being applied to the blades 7 and 8. Based on these detected loads, GO/NO-GO judgment is made about the stripped state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric wire peeling apparatus and an electric wire peeling method for peeling an electric wire covered with a core wire.

  In a conventional wire stripping device, a pair of blades are cut into a wire covered with a core wire at a position away from the end of the strip, and then the pair of blades is moved sideways to the end as it is. The coating is stripped over a predetermined stripping length (strip length). Such a skinning process is performed each time the electric wires cut to a certain length are sequentially conveyed one by one, and the electric wires that have finished the skinning process are sequentially conveyed to a crimping machine that crimps a terminal to the core wire. . In such a wire stripping device, the stripping failure as shown in FIGS. 12B to 12F occurs.

  FIG. 12A shows an electric wire 100 with good skinning (“strip good product”) in which the covering 101 is normally peeled and all the core wires 102 are exposed over a predetermined skinning length. . FIG. 12B shows the electric wire 100 having a bad peeling (“core wire flaw”) in which the blade 103 has a scratch 103 on the core wire 102 because the blade has an excessive depth of cut. FIG. 12 (C) shows that the cutting depth of the blade is too large, and when the blade is moved laterally toward the terminal side, a part of the core wire 102a on the outside has been pulled out (“core wire drawing”). The electric wire 100 of FIG. FIG. 12 (D) shows an unsheathed wire (“core wire cut”) in which part of the core wire 102a is cut by the blade because the blade has a greater depth of cut than in FIG. 12 (B). 100 is shown. In FIG. 12E, since the cutting depth of the blade is too small, all the core wires 102 are not exposed in a predetermined peeling length range, and a part of the covering 101a remains without being peeled. An electric wire 100 having a defective peeling (“covering residue”) is shown. FIG. 12 (F) shows the unstripable (“no strip”) electric wire 100 in which all of the covering 101 remains without being peeled because the blade has not been cut into the covering 101. Yes.

  As a strip mistake inspection apparatus for detecting such a peeling defect, a device as shown in FIG. 13 is known which detects a peeling defect in a non-contact manner using an optical sensor (for example, Patent Document 1 and Patent). (See FIG. 10 of Document 2).

  The strip mistake inspection apparatus 200 shown in FIG. 13 includes a peeling apparatus 300 that peels the coating 101 at the end of the electric wire 100, and a terminal crimping machine 400 that crimps a terminal to the core wire 102 that has been peeled off and exposed. Arranged between. As shown in FIG. 14, the strip miss inspection apparatus 200 has two portions of the stripped electric wire 100 conveyed from the stripping device 300 (two portions of the exposed core wire 102 portion and the covering 101 portion). Light emitters 201 and 202 for emitting light to the light source, and light receivers 203 and 204 for receiving light from each light emitter.

  In this strip miss inspection device 200, the light shielding amount (light shielding time) when the light emitted from each light emitter 201, 202 passes through the core wire 102 portion and the covering 101 portion of the electric wire 100 is determined. , 204 is obtained by converting the photoelectric output of the circuit 204 into a voltage. The ratio β / α of the light shielding amount by the portion of the core wire 102 (light shielding time β shown in FIG. 15B) to the light shielding amount by the coating 101 portion (light shielding time α shown in FIG. 15A) is calculated, By comparing the ratio with a predetermined value, it is determined whether the peeled wire is good or bad.

Furthermore, as another electric wire peeling device, based on torque change data applied to the motor obtained by driving a motor for relative movement of the peeling blade that moves the peeling blade relatively toward the end of the electric wire. In addition, a device for determining whether the skinned state is good or bad is known (for example, see Patent Document 3).
JP-A-6-225423 JP-A-7-19819 JP-A-11-150825

  By the way, the conventional strip miss inspection apparatus 200 that performs non-contact detection of an unskinning failure using an optical sensor has the following problems.

  (1) Since the electric wire 100 that is in the process of being transported from the skin peeling device 300 to the terminal crimping machine 400 is passed through the strip error inspection device 200, the electric wire is peeled off due to bending of the electric wire, vibration during transportation, etc. Misjudgment is often made.

  (2) In recent years, in electric wires for automobiles, the diameter and the thickness of the coating have been reduced, and due to the thinning of the coating, the light shielding time value β obtained from the core wire 102 and the light shielding time obtained from the coating 101 portion. The difference with α is less likely to appear. As a result, it is difficult to perform a stable pass / fail judgment on the peeled state of the electric wire.

Moreover, in the electric wire peeling apparatus described in the said patent document 3, when driving the peeling blade relative movement motor and moving the peeling blade toward the terminal part of an electric wire, it is used as a peeling blade relative movement motor. Such torque change data includes an influence due to disturbance factors such as sliding resistance in the following parts, in addition to the load applied to the skinning blade.
(1) The sliding resistance of the ball screw portion of the skin moving blade relative movement motor M-1.
(2) The sliding resistance of the guide portion that guides the skinning blade head driven by the motor M-1 in the front-rear direction (longitudinal direction of the electric wire).
(3) The sliding resistance of the bevel gear which transmits the rotation of the shaft portion of the motor M-2 for the skinning blade to the ball screw screwed with the nut of the skinning blade head by changing the rotation direction by 90 °.
(4) Sliding resistance of the ball screw screwed with the nut of the skinning blade head, and sliding resistance of the guide portion that guides the skinning blade head in the cutting direction into the electric wire.

  Since the load applied to the blade (peeling blade) is very small, the torque change data applied to the blade relative movement motor due to disturbance factors such as sliding resistance at each of the above parts and changes over time There is a possibility that it cannot be detected accurately. As a result, when the quality of the peeled state is judged based on the torque change data applied to the blade relative movement motor, misjudgment such as judging a good product as a defective product and vice versa is expected. The The occurrence of such an erroneous determination becomes particularly noticeable when determining whether the skinned state is good or not with respect to a thin wire or a thin coated wire.

  The present invention has been made by paying attention to such conventional problems, and its purpose is to make stable pass / fail judgments with few false judgments regarding the peeled state even with thin wires and thin wires. An object of the present invention is to provide a wire stripping device and a wire stripping method.

  According to a first aspect of the present invention for solving the above-described problem, a pair of blades is cut as it is after a pair of blades are cut into a wire covered with a core wire at a position separated from the terminal by a peeling length. In the wire skinning device that peels the sheath by moving laterally relative to the electric wire to the terminal side, the load at the time of cutting applied to the blade when the pair of blades are cut into the coating of the wire, A wire stripping device comprising load detection means for detecting at least one of the lateral movement loads applied to the blades when the pair of blades are laterally moved to the terminal side.

  According to this configuration, the load detection unit can detect at least one of the load at the time of cutting applied to the pair of blades and the load at the time of lateral movement applied to the pair of blades. The cutting load varies depending on a state where the blade is not touching the coating, a state where the blade is cut into the coating, and a state where the blade is touching the core wire. Further, the load at the time of lateral movement varies depending on the cutting depth of the pair of blades with respect to the coating. For this reason, it is possible to determine the quality of the skinned state based on at least one of the load at the time of cutting and the load at the time of lateral movement detected by the load detecting means. In addition, since the load detection means detects at least one of the load at the time of cutting and the load at the time of lateral movement applied by the load detection means, the load at the time of cutting and the load at the time of lateral movement depend on disturbance factors other than the load applied to the blade. There is little influence. For this reason, it is possible to accurately detect a minute load applied to the blade, and it is possible to determine whether the peeled state is good or not based on the detected load. Accordingly, it is possible to perform stable quality determination with few erroneous determinations regarding the peeled state even with a thin wire (thin wire) or a thin coated wire (thin wire).

  In the first aspect, the load detecting means includes a first load sensor that detects the load at the time of cutting and a second load sensor that detects the load at the time of lateral movement. There are the following two patterns of skin peeling defects (strip mistakes). One pattern is that when the pair of blades are cut into the sheath of the electric wire, the cutting depth of the blades is too large and the blade is damaged by the blade ("core wire scratch"). is there. In the other pattern, since the cutting depth of the blade is too small, when the blade is laterally moved to the terminal side while being cut into the coating, a part of the coating is peeled off within the range where the wire end is peeled off. Skinning failure ("covering residue") that remains untouched.

  In the conventional strip mistake detection apparatus that uses a photosensor to detect a peeling defect as described in Patent Document 1 and Patent Document 2, it is difficult to detect the core flaw.

  According to this configuration, the load at the time of cutting can be detected by the first load sensor, and the load at the time of lateral movement can be detected by the second load sensor. Since the load at the time of cutting detected at the time of the above core wire scratch is larger than the load at the time of cutting detected at the time of good peeling, compare the detected load at the time of cutting with the load at cutting when the skin is good. Thus, the presence or absence of a core wire scratch can be determined. Also, since the lateral movement load detected at the time of the above coating residue is smaller than the lateral movement load detected when the skinning is good, the detected lateral movement load is compared with the lateral movement load when the skinning is good. By doing so, the presence or absence of the covering residue can be determined.

  Furthermore, it is the structure which each detects the load at the time of cutting applied to a braid | blade, and the load at the time of a horizontal movement by the 1st load sensor and the 2nd load sensor. For this reason, the distance between the blade and the first load sensor and the distance between the blade and the second load sensor can be shortened, and the number of components interposed between the blade and each load sensor can be reduced. it can. Thereby, the load at the time of cutting and the load at the time of lateral movement detected by each load sensor are less affected by disturbance factors other than the load applied to the blade. Therefore, it is possible to accurately detect a minute cutting load and a lateral load load applied to the blade, and it is possible to make a stable pass / fail judgment with few erroneous judgments regarding the peeled state.

  In the first aspect, the covering of the end portion is peeled based on at least one of the load at the time of cutting detected by the first load sensor and the load at the time of lateral movement detected by the second load sensor. It has the quality determination means which determines the quality of the peeled state of the said electric wire.

  According to this configuration, the quality determination means can determine the quality of the stripped state of the wire by a determination method such as comparing at least one of the detected cutting load and lateral movement load with a reference value. it can. In addition, in the above conventional strip miss detection device, since the wire is passed through the strip miss inspection device while being transported from the wire stripping device to the terminal crimping machine, the stripping state of the wire due to bending of the wire or vibration during transport In many cases, misjudgment is made for good or bad. On the other hand, according to this configuration, the wire skinning device includes the non-defective product determination means, and it is possible to determine whether the skinned state is good or bad for the wire in the stopped state. It is possible to reduce misjudgment.

  In the first aspect, based on the detected value of the cutting load detected by the first load sensor and the amount of movement of the blade in the cutting depth direction with respect to the coating, the blade with respect to the coating It has a cutting depth setting means for automatically setting the cutting depth.

  According to this configuration, the cutting depth of the blade with respect to the coating is automatically set based on the detected value of the cutting load detected by the first load sensor and the amount of movement of the blade in the cutting depth direction with respect to the coating. Therefore, the blade can be cut to the optimum cutting depth automatically set in the coating. Thereby, even when the electric wire is a thin wire or a thin wire, when the blade is cut into the coating, the occurrence of the core wire scratch can be more reliably suppressed. In addition, since the appropriate cutting depth of the blade with respect to the coating can be automatically set, it is possible to reduce the peeling defect of the coating residue and the like.

  1st aspect WHEREIN: It has a blade replacement | exchange notification means which notifies replacement | exchange of the said blade, and the said cutting depth setting means has an appropriate cutting depth, when setting the cutting depth of the said blade automatically If it is determined that there is no appropriate cut depth, the blade replacement notification means is operated.

  When the blade is worn, the relationship between the amount of movement of the blade in the cutting depth direction relative to the blade coating and the detected cutting load is different from that when the blade is not worn. As blade wear progresses, the range of cut depths that can be automatically set becomes narrower. According to this configuration, the cutting depth setting means operates the blade replacement notifying means when it is determined that there is no appropriate cutting depth due to the progress of wear of the blade, so that the blade replacement can be urged.

  According to the second aspect of the present invention, after a pair of blades are cut into a sheath of an electric wire covered with a core wire at a position separated from the terminal by a peeling length, the pair of blades are directly connected to the terminal side. In the method of peeling an electric wire, the wire is peeled by moving it relatively laterally with respect to the load at the time of cutting applied to the blade when the pair of blades are cut into the coating of the electric wire, and the pair of blades. It is an electric wire stripping method characterized by detecting at least one of a lateral movement load applied to the blade when laterally moving to the terminal side.

  According to this configuration, it is possible to determine whether the skin is peeled off based on at least one of the detected load at the time of cutting and the load at the time of lateral movement. In addition, since the load at the time of cutting and the load at the time of lateral movement are less influenced by disturbance factors other than the load applied to the blade, it is possible to accurately detect the fine load applied to the blade, and the skin is peeled off based on the detected load. It is possible to determine whether the state is good or bad. Accordingly, it is possible to perform stable quality determination with few erroneous determinations regarding the peeled state even with a thin wire (thin wire) or a thin coated wire (thin wire).

  In the second aspect, on the basis of at least one of the detected load at the time of cutting and the load at the time of lateral movement, the quality of the peeled state of the electric wire with the covering of the end portion peeled is determined. Features. According to this configuration, the quality of the stripped state of the electric wire can be determined by a determination method such as comparing at least one of the detected load at the time of cutting and the load at the time of lateral movement with a reference value. In particular, it can be determined whether there is a core flaw or whether there is a coating residue. Moreover, misjudgment can be reduced about the good and bad of the peeling state of an electric wire.

  In the second aspect, the cutting depth of the blade with respect to the coating is automatically set based on the detected load at the time of cutting and the amount of movement of the blade in the cutting depth direction with respect to the coating. To do. According to this configuration, the appropriate cutting depth of the blade with respect to the coating is automatically set by referring to the map based on the detected cutting load and the amount of movement of the blade in the cutting depth direction with respect to the coating. The blade can be cut to the optimum cutting depth automatically set in the coating. Thereby, even if the electric wire is a thin wire or a thin wire, it is possible to more reliably suppress the occurrence of the core wire scratch, and to reduce the peeling defect such as the coating residue.

  In the second aspect, when automatically setting the cutting depth of the blade, it is determined whether or not there is an appropriate cutting depth. If it is determined that there is no appropriate cutting depth, the blade is replaced. It is characterized by notifying. According to this configuration, when it is determined that the blade wears out and there is no appropriate cutting depth, it is possible to prompt the user to replace the blade.

Hereinafter, each embodiment which actualized the electric wire stripping apparatus which concerns on this invention is described based on drawing. In the description of each embodiment, similar parts are denoted by the same reference numerals, and redundant description is omitted.
(First embodiment)
An electric wire peeling apparatus 1 and an electric wire peeling method according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a schematic configuration of the wire stripping apparatus 1, and FIG. 2 shows an electrical configuration of the wire stripping apparatus 1.

  A wire stripping device 1 shown in FIG. 1 includes a slide table 2 that can move in the X-axis direction (left-right direction in the figure), a ball screw 3 that is screwed into an internal thread portion (not shown) of the slide table 2, A lateral movement motor M1 for rotating the ball screw 3 forward and backward. The slide table 2 is supported on a base (not shown) so as to be movable in the X-axis direction. The lateral movement motor M1 is a motor for setting the skinning length. In the slide table 2, when the lateral movement motor M1 is driven forward, the ball screw 3 rotates forward and moves to the left in the X-axis direction. When the movement motor M1 is driven reversely, the ball screw 3 rotates backward. Thus, it moves to the right in the X-axis direction.

  The electric wire stripping device 1 has a ball screw 4 that extends vertically upward from the slide table 2 and is rotatably supported by the slide table 2, and a female screw portion (not shown) that is screwed into the ball screw 4. Blade moving plates 5 and 6 and a cutting motor M2 for rotating the ball screw 4 forward and backward are provided. A pair of blades 7 and 8 for skinning are fixed to the left end portions of the blade moving plates 5 and 6, respectively. When the cutting motor M2 is driven forward, the ball screw 4 rotates forward and the blades 7 and 8 approach each other in the Y-axis direction, that is, the blades 7 and 8 are in the cutting depth direction (FIG. ) Move in the direction of the arrow). This movement amount is set to x1 (see FIGS. 6A to 6C). When the cutting motor M2 is driven in reverse, the ball screw 4 rotates in the reverse direction so that the blades 7 and 8 are separated from each other in the Y-axis direction, that is, the blades 7 and 8 are opposite to the cutting depth direction. It is designed to move in the direction.

  Furthermore, the wire stripping device 1 includes first load cells 21 and 22 as first load sensors, and second load cells 23 and 24 as second load sensors.

  The first load cells 21 and 22 are disposed on the strain generating portions 25 and 26 that are cantilevered by the blade moving plates 5 and 6, respectively. The base end portions of the blades 7 and 8 are fixed to the strain generating portions 25 and 26, respectively. The first load cells 21 and 22 arranged in this way are used when the blades 7 and 8 are moved in the cut depth direction and cut into the coating 11 of the electric wire 10 when the blades 7.8 are cut. The load (the load F shown in FIGS. 6A to 6C) is detected.

  The second load cells 23 and 24 are disposed on the left end portions (distortion portions) of the blade moving plates 5 and 6. When the second load cells 23 and 24 cut the blades 7 and 8 into the covering 11 at the peeling length position, the blades 7 and 8 are moved to the terminal 10a side of the electric wire 10 as they are. In addition, the lateral movement load (load F shown in FIGS. 8A to 8C) applied to the blades 7 and 8 is detected.

  That is, when the second load cells 23 and 24 are laterally moved to the terminal 10a side with the blades 7 and 8 cut into the covering 11, respectively, the second load cells 23 and 24 are shown at the left end portions of the blade movable plates 5 and 6, respectively. 1, the load at the time of lateral movement (tensile load) acting in the left direction is detected. Note that the amount of movement of the blades 7 and 8 when the blades 7 and 8 in the skinning length position are laterally moved to the terminal 10a side of the electric wire 10 is x2 (see FIGS. 8A to 8C).

  Further, as shown in FIG. 2, the wire stripping device 1 includes a control unit 30, a lateral movement motor drive circuit 31 that drives the lateral movement motor M1, and a cutting motor that drives the cutting motor M2. It has a drive circuit 32 and a defective product notification lamp 33.

  The control unit 30 includes a CPU 34, a ROM 35, a RAM 36, a backup memory and an interface circuit (not shown). Based on the signal indicating the load at the time of cutting detected by the first load cells 21 and 22 and the signal indicating the load at the time of lateral movement detected by the second load cells 23 and 24, the CPU 34 “ The “wire peel-off state determination process” is executed. The ROM 35 stores in advance a control program used for the “wire stripping state determination process”. The RAM 36 temporarily stores the load at the time of cutting detected by the first load cells 21 and 22 and the load at the time of lateral movement detected by the second load cells 23 and 24 in the “wire skinning state determination process”. To do.

  In the electric wire peeling apparatus 1 having such a configuration, the electric wire 10 is peeled as follows. First, the electric wire 10 in which the core wire 12 (see FIG. 4A) is covered with the covering 11 is conveyed to the skinning position shown in FIG. Thereafter, the pair of blades 7 and 8 are cut into the covering 11 of the electric wire 10 at a position away from the terminal 10a by the skin peeling length L (see FIG. 4A). Next, the pair of blades 7 and 8 are cut to a predetermined cutting depth in the coating 11 as shown in FIG. Next, with the pair of blades 7 and 8 being cut into the coating 11, the blades 7 and 8 are moved laterally relative to the electric wire 10 toward the terminal 10a (in the direction of the arrow in FIG. 4B). As a result, the end portion 11a of the covering 11 is peeled by the skin peeling length L as shown in FIG.

  The “predetermined cut depth” used in the stripping process of the electric wire 10 is stored in a backup memory (not shown in FIG. 2), and the stored contents are not erased even after the power is turned off. . When the electric wire stripping device 1 is turned on, the setting value of the cutting depth stored in the backup memory can be read out.

  When the blades 7 and 8 are cut into the coating 11 in the skinning process of the electric wire 10, the cutting load applied to the blades 7 and 8 is such that the blades 7 and 8 do not touch the coating 11. It differs depending on the state of being cut into the coating 11 and the state of touching the core wire 12.

  That is, while the amount of movement x1 of the blades 7 and 8 in the cut depth direction is small and the blades 7 and 8 do not touch the coating 11 (see FIG. 5A), the cuts applied to the blades 7 and 8 The hourly load (load F) is zero as shown in FIG. In addition, the movement amount x1 further increases, and the load at the time of cutting increases rapidly between the time when the blade 7.8 hits the coating 11 and the time when the blade 7.8 is cut into the coating 11, and the first maximum value (threshold value). F1 is reached (see FIG. 6B). Thereafter, when the blades 7 and 8 start to be actually cut into the coating 11, the load at the time of cutting gradually decreases from the maximum value F1. Further, the load x1 increases sharply until the blade 7.8 hits the core wire 12 until it is cut into the core wire 12 as shown in FIG. 5C. Thus, the second maximum value (threshold value) F2 is reached (see FIG. 6C). After this, when the blades 7 and 8 start to be actually cut into the core wire 12, the cutting load gradually decreases from the maximum value F2. Then, when the movement amount x1 is further increased and a part of the core wire 12 (the core wire 12a on the outside shown in FIG. 11D) is cut by the blade 7.8, the load at the time of cutting sharply decreases ( (See FIG. 6C).

  On the other hand, in the above-described skinning process of the electric wire 10, when the pair of blades 7 and 8 are cut laterally relative to the electric wire 10 while being cut into the covering 11, the blades 7 and 8 are applied. The load at the time of lateral movement (load F) varies depending on the cutting depth of the blades 7 and 8 into the coating 11.

  That is, since the depth of cut is small, when the peeling defect (“covering residue”) shown in FIG. 7A occurs, the load at the time of lateral movement applied to the blades 7 and 8 is the initial value of the lateral movement. Becomes the maximum value F3, and then decreases (see FIG. 8A). In addition, when the depth of cut is appropriate and the peelability is good as shown in FIG. 7B (“good strip”), the load during lateral movement applied to the blades 7 and 8 is the initial value of the lateral movement. Becomes the maximum value F4 (F4> F3), and thereafter decreases (see FIG. 8B). Then, if the depth of cut is too large and the peeling defect shown in FIG. 7C (“core wire drawing”) occurs, the load at the time of lateral movement applied to the blades 7 and 8 is the lateral movement. Initially, the maximum value is F5 (F5> F4), and thereafter decreases (see FIG. 8C).

  Therefore, in this embodiment, when the blades 7 and 8 are cut into the coating 11, the load at the time of cutting applied to the blades 7 and 8 is detected by the first load cells 21 and 22, and the detected load at the time of cutting is calculated. When the second maximum value (threshold value) F2 is reached, it is determined as “skinning failure”. Further, when the blades 7 and 8 are laterally moved relative to the electric wire 10 with the blades 7 and 8 being cut into the covering 11, the lateral load applied to the blades 7 and 8 is applied to the second load cells 23 and 24. If the detected maximum value of the lateral movement load is not within the “non-defective product determination range”, it is determined as “skinning failure”. Here, the “non-defective product determination range” refers to a range from the load value larger than the maximum value F3 to the load value smaller than the maximum value F5 in the range centered on the maximum value F4.

  In this way, the CPU 34 executes a “wire skinning state determination process” for determining whether the skinning state is good or bad. In the following, the “wire stripping state determination process” executed by the CPU 34 in the wire stripping apparatus 1 will be described based on the flowchart of FIG. 3.

  First, in step S100 of FIG. 3, it is determined whether or not the electric wire 10 has been transported to the skinning position shown in FIG. While the determination result of step S100 is No, step S100 is repeated, and when the determination result is Yes, the process proceeds to step S101.

  Note that the “skinning position” here refers to the end of the electric wire 10 that is sequentially conveyed to the electric wire peeling device 1 after being cut to a certain length within the movement locus of the blade 7.8. This is a position where the terminal 10a of the electric wire is in contact with a positioning member (not shown). The determination as to whether or not the electric wire 10 has been transported to the skinning position is performed by, for example, electrically detecting whether or not the terminal 10a of the electric wire 10 being transported has hit the positioning member.

  The blade 7.8 drives and controls the lateral movement motor M1 every time the electric wires 10 sequentially conveyed are peeled off, so that the terminal 10a of the electric wires 10 conveyed to the skinning position is controlled. It is moved to a position away from the skinning length L. That is, the blade 7.8 is positioned away from the terminal 10a by the skinning length L by outputting a motor control signal from the control unit 30 to the lateral movement motor drive circuit 31 to drive and control the lateral movement motor M1. Until the wire 10 is moved in the longitudinal direction (X-axis direction).

  In step S101, the pair of blades 7 and 8 are cut into the electric wire 10 at a position away from the terminal 10a by the peeling length L, and a cut is made in the covering 11 (see FIG. 5B).

  At this time, by outputting a motor control signal from the control unit 30 to the cutting motor drive circuit 32 to drive and control the cutting motor M2, the movement amount x1 in the cutting depth direction of the blades 7 and 8 is “ It moves from the origin position of “0” in the cutting depth direction (arrow direction in FIG. 5A). When the pair of blades 7 and 8 are moved by a predetermined amount of movement in the cutting depth direction from the origin position by the rotation of the cutting motor M2, the cutting motor M2 is stopped.

  Thereafter, the process proceeds to step S102. In step S102, when the pair of blades 7 and 8 are cut into the covering 11 of the electric wire 10 in step 101, the load at the time of cutting applied to the blades 7 and 8 is detected by the first load cells 21 and 22, Remember. Here, the load at the time of cutting detected by the first load cells 21 and 22 is sequentially stored in the RAM 36 at regular intervals, for example.

  Thereafter, the process proceeds to step S103, and the blades 7.8 are moved to the terminal 10a side (in the direction of the arrow in FIG. 5B) while the blades 7 and 8 are cut into the covering 11 (see FIG. 5B). ) Move relative to the electric wire 10 sideways.

  At this time, a motor control signal is output from the control unit 30 to the lateral movement motor drive circuit 31 to drive and control the lateral movement motor M1, so that the blades 7 and 8 are separated from the terminal 10a by the skinning length L. It is moved laterally relative to the electric wire 10 from the position toward the terminal 10a. By this lateral movement, the covering 11 at the end of the electric wire 10 is peeled off by the blades 7 and 8 by a predetermined peeling length L (see FIG. 4C).

  Thereafter, the process proceeds to step S104. In this step S104, when the blades 7 and 8 are laterally moved to the terminal 10a side of the electric wire 10 in the above step 103, the load at the time of lateral movement applied to the blades 7 and 8 is detected by the second load cells 23 and 24, Remember. Here, the lateral movement load detected by the second load cells 23, 24 is sequentially stored in the RAM 36, for example, at regular intervals.

  Thereafter, the process proceeds to step S105. In Step 105, the maximum value of the cutting load detected in Step S102, that is, the maximum cutting load among the plurality of cutting loads detected and sequentially stored in the RAM 36 is the second maximum value (threshold value). It is determined whether or not F2 (see FIG. 6C) has been reached.

  If the determination result in step S105 is Yes, the blade 7.8 abuts against the core wire 12 and is cut into the core wire 12 as shown in FIG. ) Since it can be determined that F2 has been reached, the process proceeds to step S106, where “skinning failure” is determined, and a skinning failure signal is output. By outputting this peeling defect signal to the defective product notification lamp 33, the defective product notification lamp 33 is turned on, and by this lighting, the operator knows that the electric wire 10 that has been subjected to the skinning process is defective in peeling. Can be recognized. Thereafter, the process shown in FIG.

  On the other hand, if the determination result of step S105 is No, the process proceeds to step S107. In step S107, the maximum value of the lateral movement load detected in step S104, that is, the maximum lateral movement load among the plurality of lateral movement loads detected and sequentially stored in the RAM 36 is within the “good product judgment reference range”. It is determined whether or not.

  In the case of No in step S107, when the “coating residue” shown in FIG. 7A occurs because the cutting depth of the blades 7 and 8 is small, or because the cutting depth is too large, FIG. Since “core drawing” shown in C) occurs, the process proceeds to step S106. In this step S106, it is determined that “skinning failure” and a skinning failure signal is output. By outputting this peeling defect signal from the control unit 30 to the defective product notification lamp 33, the defective product notification lamp 33 is turned on, and by this lighting, the stripped electric wire 10 is defective in peeling. Can be recognized by the operator. Thereafter, the process shown in FIG.

  On the other hand, in the case of Yes in step S107, the cutting depth of the blades 7 and 8 is appropriate, and the “strip good product” shown in FIG. In this case, since the defective product notification lamp 33 remains off and is not turned on, the operator can recognize that the state of skinning of the electric wire 10 that has been subjected to skinning is good (normal). Thereafter, the process shown in FIG.

  The above steps S100 to S107 are repeated each time the electric wire 10 is transported to the skinning position.

In the wire stripping device 1 according to the first embodiment, based on the load at the time of cutting detected by the first load sensors 21 and 22 and the load at the time of lateral movement detected by the second load sensors 23 and 24, The quality determination means for determining the quality of the peeled state of the electric wire 10 is configured by the CPU 34 of the control unit 30.

According to 1st Embodiment described above, there exist the following effects. The load F (load at the time of cutting) applied to the blades 7 and 8 at the time of cutting into the coating 11 is such that each blade does not touch the coating 11, is cut into the coating 11, and touches the core wire 12. It depends on the state of being. Further, when the blades 7 and 8 are laterally moved to the terminal 10 a side while being cut into the coating 11, the load F (load during lateral movement) applied to the blades 7 and 8 is the cutting depth of each blade with respect to the coating 11. It depends on. For this reason, it is possible to determine pass / fail regarding the peeled state based on the cutting load detected by the first load sensors 21 and 22 and the lateral movement load detected by the second load sensors 23 and 24.

  ・ The load at the time of cutting and the load at the time of lateral movement are less affected by disturbance factors other than the load F applied to the blades 7 and 8. For this reason, it is possible to accurately detect a fine load applied to the blades 7 and 8, and to perform pass / fail judgment on the peeled state based on the detected load. Accordingly, it is possible to perform stable quality determination with few erroneous determinations regarding the peeled state even with a thin wire (thin wire) or a thin coated wire (thin wire).

  The load at the time of cutting and the load at the time of lateral movement applied to the blades 7 and 8 are detected by the first load sensors 21 and 22 and the second load sensors 23 and 24, respectively. Therefore, the distance between the blades 7 and 8 and the first load sensors 21 and 2 and the distance between the blade and the second load sensors 23 and 24 can be shortened, and the distance between the blade and each load sensor can be reduced. The number of intervening components can be reduced. Thereby, the load at the time of cutting and the load at the time of lateral movement detected by each load sensor are less affected by disturbance factors other than the load applied to the blade. Therefore, it is possible to accurately detect a minute cutting load and a lateral load load applied to the blade, and it is possible to make a stable pass / fail judgment with few erroneous judgments regarding the peeled state.

  ・ The load at the time of cutting detected at the time of the above core wire scratch (see FIG. 11B) is larger than the load at the time of cutting detected at the time of good peeling (see FIG. 7B). The presence or absence of a core wire flaw can be determined by comparing the time load with the load at the time of cutting when the peel is good.

  -The lateral movement load detected at the time of the above-mentioned covering residue (see FIG. 7A) is smaller than the lateral movement load detected at the time of good peeling (see FIG. 7B). By comparing the time load with the load at the time of lateral movement when the skinning is good, it is possible to determine the presence or absence of the coating residue.

  -The detection of the peeling defect and the load at the time of lateral movement are not detected using an optical sensor as in the conventional strip miss detection device described in Patent Document 1 and Patent Document 2 above. Based on the above, the pass / fail judgment on the peeled state is performed. For this reason, it is possible to determine the presence or absence of a core wire scratch and the presence or absence of a coating residue even with a thin wire (thin wire) or a thin wire (thin wire).

  In the above-described conventional strip error detection device, the electric wire that is being conveyed from the peeling device 300 to the terminal crimping machine 400 is passed through the strip error inspection device. On the other hand, in this embodiment, the first load cells 21 and 22 mounted on the apparatus 1 and the first load cells 21 and 22 are used to determine whether the electric wire 10 that has been transported to the electric wire peeling apparatus 1 and is in a stopped state is in the peeled state. This is performed based on the detection values of the two load cells 23 and 24. For this reason, it is possible to reduce misjudgment of good or bad state of the peeled state of the electric wire due to bending of the electric wire, vibration during conveyance, or the like as in the conventional strip error detecting device.

The load sensor mounting type wire stripping device 1 in which the first load cells 21 and 22 for detecting the load at the time of cutting and the second load cells 23 and 24 for detecting the load at the time of lateral movement are mounted is realized. . Therefore, as in the prior art described in the above Patent Documents 1 and 2, etc., compared to the case where a strip mistake inspection device is arranged between the peeling device and the terminal crimping machine, the stripping of the electric wire is not performed. The processing space up to the crimping process can be reduced.
(Second Embodiment)
An electric wire peeling apparatus 1 and an electric wire peeling method according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 9 is a flowchart showing the “cutting depth automatic setting process” performed in the present embodiment, and FIGS. 10A and 10B are schematic diagrams for explaining the “cutting depth automatic setting process”.

  In the first embodiment, when performing the skinning process on the electric wires 10 that are sequentially transported to the skinning position, the operator sets the cutting depth of the blades 7 and 8 in advance. , 8 are cut into the covering 11 of the electric wire 10 to a preset cutting depth at a position away from the terminal 10a by the peeling length L.

  On the other hand, in the electric wire peeling apparatus 1 according to the second embodiment, before starting the peeling process, the first electric wire 10 that is first transported after the apparatus is turned on is used to cover the covering 11. The cutting depth A of the blades 7 and 8 is automatically set.

  For this purpose, the wire stripping device 1 according to the second embodiment is configured to detect the load value at the time of cutting detected by the first load sensors 21 and 22 and the direction of the cutting depth of the blades 7 and 8 with respect to the coating 11. And a cutting depth setting means for automatically setting the cutting depth A based on the movement amount x1.

  In the following description, as shown in FIG. 10A, the amount of movement of the blades 7 and 8 when the blades 7 and 8 are moved in the cutting depth direction from the origin position of x1 = 0 is expressed as “blade movement. Called “amount”. In this embodiment, in order to automatically set the “cutting depth A”, as shown in FIG. 10B, the blades 7 and 8 are cut into the coating 11 to the position of the cutting depth A. “Blade movement amount xd” (see FIG. 10A) is automatically set.

  The cutting depth setting means is constituted by the CPU 34 of the control unit 30. In other words, in the present embodiment, the CPU 34 performs the above-described “wire peeling state determination process” for the second and subsequent wires 10 and shows the first wire 10 in FIG. 9. “Incision depth automatic setting process” is executed.

  The “blade movement amount xd” automatically set by this “cutting depth automatic setting process” is stored in the backup memory (not shown in FIG. 2), and the stored contents are not erased even after the power is turned off. ing. The blade movement amount xd stored in the backup memory is read out and used when the second and subsequent electric wires 10 conveyed after the first electric wire 10 are peeled.

  Hereinafter, the “cutting depth automatic setting process” executed by the CPU 34 of the control unit 30 will be described with reference to the flowchart of FIG. 9 and FIG. 10.

  First, in step S200, it is determined whether or not the electric wire stripping apparatus 1 is turned on. If this determination result is No, the process shown in FIG. 9 is temporarily ended.

  If the determination result of step S200 is Yes, the process proceeds to step S201. In step S201, it is determined whether or not the blade movement amount xd corresponding to the cutting depth A is stored in the backup memory. If the determination result in step S201 is Yes, that is, if the blade movement amount x1 has already been automatically set and stored in the backup memory, the blade movement amount x1 need not be automatically set, so the processing shown in FIG. Exit once.

  On the other hand, if the determination result of step S201 is No, the process proceeds to step S202. In step S202, as in step S100 shown in FIG. 3, it is determined whether or not the electric wire 10 has been transported to the skinning position. Here, the electric wire 10 for which it is determined whether or not it has been conveyed to the skinning position is the first electric wire 10 that is first conveyed immediately after the power is turned on. If the determination result of step S202 is No, the process returns to step S202.

  When the determination result in step S202 is Yes, the process proceeds to step S203, and the blades 7 and 8 are cut into the electric wire 10. At this time, by outputting a motor control signal from the control unit 30 to the cutting motor drive circuit 32 to drive and control the cutting motor M2, the origin position (X1 = 0) indicated by the one-dot chain line in FIG. ) And move the blades 7 and 8 in the depth direction.

  Next, the process proceeds to step S204, and the load F (load at the time of cutting) applied to the blades 7 and 8 is detected and stored in the same manner as in step S102 shown in FIG.

  Next, the process proceeds to step S205, and whether or not the detected cutting load has reached the second maximum value (threshold value) F2 (see FIG. 6C) as in step S105 shown in FIG. judge. When this determination result is No, the process returns to step S203, and the blades 7 and 8 are further moved in the cutting depth direction.

  If the determination result in step S205 is Yes, that is, if the blades 7 and 8 abut against the core wire 12 as shown in FIG. 10A and the load at the time of cutting reaches the threshold value F2, the process proceeds to step S206. Note that the cutting motor M2 is stopped when the determination result of step S205 is Yes.

  In step S206, the blade movement amount x1 (= xmax) when the cutting load reaches the threshold value F2 is read and stored in a backup memory not shown in FIG. A state in which the blades 7 and 8 are in contact with the core wire 12 of the electric wire 10 is indicated by a solid line in FIG.

  In step S207, the blade movement amount xmax is subtracted from the blade movement amount xmax to obtain the blade movement amount xd corresponding to the cutting depth A, and the blade movement amount xd is stored in the backup memory. Here, the “constant movement amount xc” is obtained when the cutting depth A obtained by subtracting the movement amount xc from the known thickness B of the coating 11 is to obtain a non-defective strip shown in FIG. It is set to an optimal value.

  After step S207 ends, the process shown in FIG. 9 is temporarily ended.

  The blade movement amount xd automatically set by the “cutting depth automatic setting process” shown in FIG. 9 and stored in the backup memory is backed up when the second and subsequent wires 10 are peeled. Used by reading from the memory.

  According to 2nd Embodiment described above, in addition to the effect which the said 1st Embodiment show | plays, there exist the following effects.

  The blade movement amount xd corresponding to the optimal cutting depth A can be automatically set using the first electric wire 10. The blade movement amount xd that is automatically set and stored in the backup memory can be read from the backup memory and used when the second and subsequent wires 10 are peeled.

  For this reason, when stripping the second and subsequent wires 10, the blades 7 and 8 are always cut by a constant blade movement amount xd from the origin position indicated by the alternate long and short dash line to the position indicated by the solid line in FIG. It can be moved in the depth direction. Therefore, in the skinning process of the electric wire 10, the cutting depth of the blades 7 and 8 with respect to the coating 11 can always be automatically set to the optimum cutting depth A as shown in FIG.

  -Since the cutting depth of the blades 7 and 8 with respect to the coating 11 can always be automatically set to the optimum cutting depth A, when the blades 7 and 8 are cut into the coating 11 even when the electric wire 10 is a thin wire or thin wire The occurrence of core wire scratches can be more reliably suppressed.

-Since the appropriate cutting depth A of the blades 7 and 8 with respect to the coating 11 can be automatically set, it is possible to reduce peeling defects such as the above-mentioned coating residue.
(Third embodiment)
An electric wire peeling apparatus 1 and an electric wire peeling method according to a third embodiment of the present invention will be described with reference to FIG.

  When the blades 7 and 8 are worn, the relationship between the blade movement amount x1 shown in FIG. 6C and the load F applied to the blades 7 and 8 (the detection value of the cutting load) is that the blades are worn. It will be different from the case without it.

  Specifically, when the blades 7 and 8 are not worn, the blades 7 and 8 are moved from the origin position (X1 = 0) to the cutting depth direction in step S203 of the “cutting depth automatic setting process” shown in FIG. When the blade is moved to, the relationship between the blade movement amount x1 and the load F applied to the blades 7 and 8 is as shown in FIG. For example, when the blades 7 and 8 are moved from the origin position by the blade movement amount xmax (see FIG. 10A), the blades 7 and 8 abut against the core wire 12 of the electric wire 10 and the threshold value F2 (see FIG. 6C). The infeed load is detected.

  On the other hand, when the blades 7 and 8 are worn, the relationship between the blade movement amount x1 and the load F applied to the blades 7 and 8 as shown in FIG. Specifically, as the blades 7 and 8 are worn, when the blades 7 and 8 are moved in the cutting depth direction from the origin position, the blades are not sharp so that the threshold F2 is reached. The blade movement amount x1 when the load at the time of cutting is detected becomes smaller than when the blades 7 and 8 are not worn. In this case, the blade movement amount obtained by subtracting the constant movement amount xc from the blade movement amount x1 (= xmax) when the threshold value F2 is reached in step S207 of the “cutting depth automatic setting process” shown in FIG. The value of xd becomes smaller. As the value of the blade movement amount xd becomes smaller, the range of the cutting depth A that can be automatically set becomes narrower. When the blades 7 and 8 are worn out and the blade movement amount xd becomes smaller than the blade movement amount xe until the blade contacts the coating 11 (see FIG. 10A), there is no appropriate cutting depth A. Become.

  Therefore, in the wire stripping apparatus 1 according to the present embodiment, after step S207 of the “cutting depth automatic setting process” shown in FIG. 9, it is determined whether or not the blade movement amount xd obtained in step S207 is equal to or less than a predetermined value. A determination process (step S208) is performed. If the determination result in step S208 (not shown) is No, the “cutting depth automatic setting process” shown in FIG. 9 is temporarily ended. If the determination result in step S208 is Yes, it is determined in the next step S209 (not shown) that there is no appropriate cutting depth, and the blade replacement notification lamp 50 shown in FIG. 11 is turned on.

After the blades 7 and 8 are replaced by the operator when the blade replacement notification lamp 50 is turned on, the electric wire stripping device 1 is turned on to execute the “cutting depth automatic setting process” shown in FIG. Thus, the cutting depth A can be automatically set.

According to 3rd Embodiment described above, in addition to the effect which the said 2nd Embodiment show | plays, there exist the following effects.

The CPU 34 of the control unit 30 as the cutting depth setting means determines whether or not the blade movement amount xd obtained in step S207 is equal to or less than a predetermined value after step S207 of the “cutting depth automatic setting processing” shown in FIG. That is, the process of determining whether or not there is an appropriate cutting depth is performed. When the determination result is Yes, it is determined that there is no appropriate cutting depth, and the blade replacement notification lamp 50 is turned on, so that the blades 7 and 8 can be replaced.
By using these functions, the “cutting depth automatic setting process” is performed periodically, for example, once a day, etc., thereby prompting the setting of the cutting depth according to the wear state of the blade and the replacement of the blade. I can do it.
(Modification)
In addition, this invention can also be changed and embodied as follows. In the first embodiment, as load detection means, the first load cells 21 and 22 that detect the load at the time of cutting applied to the blade, and the second load cells 23 and 24 that detect the load at the time of lateral movement applied to the blade, Both are mounted on the wire stripping apparatus 1. However, the present invention is also applicable to a wire stripping device in which at least one of the first load cells 21 and 22 and the second load cells 23 and 24 is mounted.

  In the first embodiment, the load cells 21 to 24 are used as the first load sensor that detects the load at the time of cutting and the second load sensor that detects the load at the time of lateral movement, respectively. However, each of the first load sensor and the second load sensor can detect the load applied to the blades 7 and 8 directly or indirectly and can output an electric signal such as a voltage corresponding to the load. In addition to the load cell, the present invention can be applied to a configuration using a strain gauge or the like.

  -In the said 1st Embodiment, the quality determination of the peeling state based on the load at the time of cutting detected by the 1st load cell 21 and 22 as a 1st load sensor, and the 2nd load cell as a 2nd load sensor Both the quality determination of the peeled state based on the load at the time of lateral movement detected by 23 and 24 is performed. However, the wire stripping apparatus configured to determine whether the skinned state is good or not based on at least one of the load at the time of cutting detected by the first load sensor and the load at the time of lateral movement detected by the second load sensor. The present invention is applicable.

  In the first embodiment, a non-defective product notification lamp 33 may be provided in addition to the defective product notification lamp 33, and the Yes product notification lamp may be turned on in the case of Yes in step S107 shown in FIG.

  In the first embodiment, the present invention can also be applied to a configuration using other notification means such as a defective product notification buzzer instead of the defective product notification lamp 33.

  In the first embodiment, the blades 7 and 8 cut into the covering 11 are moved laterally toward the terminal 10a side of the electric wire 10, but the present invention is not limited to such a configuration. The present invention can also be applied to an electric wire peeling apparatus configured to cut a blade into a coating of an electric wire and then move the electric wire laterally relative to the blade to peel the coating.

  In the second embodiment, when the blades 7 and 8 are cut into the electric wire 10, a large value of cutting load (threshold value F <b> 2) is detected when the blades 7 and 8 hit the core wire 12. In step S206, the blade movement amount x1 (= xmax) when the cutting load reaches the threshold value F2 is read. Thereafter, in step S207, a constant movement amount xc is subtracted from the blade movement amount xmax to obtain a blade movement amount xd corresponding to the cutting depth A. However, the present invention is not limited to such a configuration, and is based on the detected value of the cutting load detected by the first load sensor and the amount of movement of the blade in the cutting depth direction with respect to the coating. Also, the present invention can be widely applied to a wire stripping apparatus having a configuration including a cutting depth setting means for automatically setting the cutting depth A.

  In the third embodiment, as the blades 7 and 8 are worn, the blade movement amount x1 when a large cutting load that reaches the threshold value F2 is detected becomes smaller than when the blade is not worn. Is used to determine whether or not there is an appropriate depth of cut. However, the present invention is also applicable to a wire stripping device configured to determine whether or not there is an appropriate cutting depth by a method different from the third embodiment when the cutting depth of the blade is automatically set. Is possible.

The side view which shows schematic structure of the electric wire peeling apparatus which concerns on 1st Embodiment. The block diagram which shows the electric constitution of the electric wire peeling apparatus. The blow chart which shows "the peeling state determination process of an electric wire" by the electric wire peeling apparatus. (A)-(C) are the schematic diagrams which show the peeling process procedure of an electric wire. (A)-(C) is a schematic diagram which shows three states from which the blade moving amount | distance to a cutting depth direction differs. (A)-(C) is a graph which respectively respond | corresponds to (A)-(C) of FIG. 5, and shows the relationship between the amount of blade movements in the cutting depth direction, and the load concerning a blade. (A)-(C) are the partial enlarged plan views which show the peeling state of an electric wire. (A)-(C) are the graphs respectively corresponding to (A)-(C) of FIG. 7, The graph which shows the relationship between the blade movement amount to an electric wire terminal direction, and the load concerning a blade. The flowchart which shows the "cutting depth automatic setting process" by the electric wire peeling apparatus which concerns on 2nd Embodiment. (A) And (B) is a schematic diagram for demonstrating a cutting depth automatic setting process. The block diagram which shows the electric constitution of the electric wire stripping apparatus which concerns on 3rd Embodiment. (A)-(F) is the elements on larger scale which show the peeling state of an electric wire. The perspective view which shows schematic structure of the conventional strip mistake inspection apparatus. The side view which shows the positional relationship of the core wire part and coating | coated part of an electric wire, and two light rays with the same inspection apparatus. (A) is a waveform diagram showing the light shielding time by the covered portion of the electric wire, (B) is a waveform diagram showing the light shielding time by the core portion of the electric wire.

Explanation of symbols

1: Wire stripping device, 7, 8: Blade, 10: Electric wire, 10a: Terminal, 11: Cover, 12: Core wire, M1: Motor for lateral movement, M2: Motor for cutting, 21, 22: First Load cell, 23, 24: second load cell, 30: control unit, 34: CPU, 50: blade replacement notification lamp.

Claims (9)

After a pair of blades are cut into the wire covered with the core wire at a position away from the terminal by a predetermined peeling length, the pair of blades is moved sideways relative to the wire as it is toward the terminal side. In the wire stripping device that strips the coating,
At least a load at the time of cutting applied to the blade when the pair of blades are cut into the sheath of the electric wire, and a load at the time of horizontal movement applied to the blade when the pair of blades are moved laterally to the terminal side A wire stripping device comprising load detecting means for detecting one of the wires. 2. The electric wire skin according to claim 1, wherein the load detection unit includes a first load sensor that detects the load at the time of cutting and a second load sensor that detects the load at the time of lateral movement. Peeling device. Based on at least one of the load at the time of cutting detected by the first load sensor and the load at the time of lateral movement detected by the second load sensor, the sheath of the wire with the covering of the end portion peeled off The wire peeling apparatus according to claim 2, further comprising: a quality determination unit that determines quality of the stripped state. Based on the detected value of the cutting load detected by the first load sensor and the amount of movement of the blade in the cutting depth direction with respect to the coating, the cutting depth of the blade with respect to the coating is automatically set. The electric wire peeling apparatus according to claim 2 or 3, further comprising a cutting depth setting means. A blade replacement notifying unit for notifying the replacement of the blade, and the cutting depth setting unit determines whether or not an appropriate cutting depth is present when automatically setting the cutting depth of the blade; The wire peeling apparatus according to claim 4, wherein when it is determined that there is no deep cut depth, the blade replacement notification unit is operated. After the pair of blades are cut into the sheath of the wire covered with the core wire at a position away from the end by a predetermined peeling length, the pair of blades is moved laterally relative to the end of the wire as it is In the method of skinning the wire to peel off the coating,
At least a load at the time of cutting applied to the blade when the pair of blades are cut into the sheath of the electric wire, and a load at the time of horizontal movement applied to the blade when the pair of blades are moved laterally to the terminal side A method of peeling an electric wire, characterized in that one is detected. 7. The quality of the peeled state of the electric wire with the covering of the end portion peeled is determined based on at least one of the detected load at the time of cutting and the load at the time of lateral movement. The method for peeling the electric wire as described in 1. 8. The cutting depth of the blade with respect to the coating is automatically set based on the detected load at the time of cutting and the amount of movement of the blade in the cutting depth direction with respect to the coating. The method for peeling the electric wire as described in 1. When automatically setting the cutting depth of the blade, it is determined whether or not there is an appropriate cutting depth, and if it is determined that there is no appropriate cutting depth, the blade replacement is notified. The method for peeling an electric wire according to claim 8.