Peeling incision device and peeling incision method

Abstract

To provide a slitting device and slitting method for peeling that can improve the slitting accuracy when the target is a thick wire or a covered wire wound around a bobbin and stored.SOLUTION: A cut mechanism 11 of a slitting device 1 for peeling includes a conductive cutter blade 111, a contact detection unit 113 that detects contact between an outermost conductor and the cutter blade 111 on the basis of variable electrostatic capacity between the outermost conductor and the cutter blade 111 in a covered wire, and a moving mechanism 112 that adjusts the position of the cutter blade 111 and positions it to make the cut at the specified cutting depth when contact with the outermost conductor is detected by a contact detection unit 113 during movement of the cutter blade 111.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a stripping device and a stripping method for making cuts from the outer surface of a coated electric wire to strip it. [Background technology]

[0002] Conventionally, stripping has been widely performed as one of the end treatments for insulated electric wires, in which the covering is removed to expose the conductor such as the core wire inside. For this stripping, a stripping incision device is known that can remove the stripped portion by making an incision from the outer surface of the insulated electric wire (see, for example, Patent Document 1). In the type of stripping incision device described in Patent Document 1, a pair of V-shaped cutter blades that clamp the insulated electric wire so as to bite into the outer surface are rotated around the axis of the electric wire to form the incision for stripping. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-350324 Summary of the Invention [Problem to be solved by the invention]

[0004] Here, the insulated electric wire includes a thick electric wire having multiple layers of coating material, such as an inner coating, a braid, a metal foil, and an outer coating, stacked around a core wire. In many cases of the above-mentioned stripping incision device, the reference point for the movement of the V-shaped cutter blade when clamping the insulated electric wire is set to the wire axis, and the destination position of the V-shaped cutter blade is specified as the distance from the wire axis. The V-shaped cutter blade is then moved toward the wire axis to bite into the insulated electric wire at a cutting depth corresponding to the specified destination position, thereby clamping the insulated electric wire. For example, when the above-mentioned thick electric wire is to be incised, the destination position of the V-shaped cutter blade is specified as the distance from the wire axis calculated by subtracting the thickness of the coating material to be stripped from the radius of the core wire and the sum of the thicknesses of the multiple layers of coating material. In this case, with thick electric wires, the tolerance of the destination position of the V-shaped cutter blade relative to the wire axis tends to be large because it is the cumulative tolerance of the core wire radius tolerance and the thickness tolerance of the coating material other than the target to be stripped. As a result, the movement accuracy of the V-shaped cutter blade is low. For example, when trying to cut into the desired coating material of the above-mentioned thick electric wire, the low movement accuracy of the V-shaped cutter blade may cause the cut to be too deep, cutting into the coating material that should be left inside. Or, the cut may be too shallow, resulting in insufficient cutting for stripping.

[0005] Furthermore, many insulated electric wires are stored wound on bobbins. During storage, the load caused by their own weight can cause the core wire and / or insulation to deform and become flattened, or the wire axis to become eccentric and shift from the center of the insulated electric wire. When such a deformed or eccentric insulated electric wire is incised using the above-mentioned type of stripping incision device, the depth of the incision made by the V-shaped cutter blades varies around the wire axis when the pair of V-shaped cutter blades are rotated around the wire axis. As a result, the incision may be too deep in some places around the wire axis, reaching parts of the interior that should be left intact, or too shallow in other places, resulting in insufficient incision.

[0006] As described above, the above-mentioned type of stripping cutting device, which rotates a pair of V-shaped cutter blades that clamp the insulated electric wire around the axis of the electric wire, has the problem that the cutting accuracy decreases when cutting thick electric wires or insulated electric wires that are wound on bobbins and stored.

[0007] Therefore, the present invention focuses on the above-mentioned problems and aims to provide a stripping cutting device and a stripping cutting method that can improve the cutting accuracy when used on thick electric wires or coated electric wires wound on bobbins and stored. [Means for solving the problem]

[0008] In order to solve the above problem, the stripping incision device is a device for cutting a wire around an axis of an insulated wire in which a core wire is covered with an insulating layer or the core wire is covered with the insulating layer and one or more conductor layers laminated inside the insulating layer. Complex The number of mechanical parts to be placed A plurality of sites, each of which has one Each of the mechanical parts makes a cut from the outer circumferential surface of the insulated electric wire to a specified cut depth. Multiple a cutting mechanism; and a rotating mechanism that rotates the mechanism portion that has made the incision in the insulated electric wire around the electric wire axis to extend the incision around the electric wire axis, thereby making it possible to remove a peeled portion according to the incision depth, Multiple Cutting mechanism each The contact between the outermost conductor and the cutter blade is determined based on a variable capacitance between the cutter blade and an outermost conductor that is shallowest from the outer circumferential surface of the insulated electric wire, the capacitance changing in accordance with the movement of the cutter blade. individually a contact detection unit that detects the contact with the cutter blade and a mechanism that configures the mechanism together with the cutter blade and moves the cutter blade in the cross direction, and when the contact is detected by the contact detection unit while the cutter blade is moving, the mechanism adjusts the position of the cutter blade in the cross direction to a position according to the cutting depth. individually and a moving mechanism for positioning the cutting surface and making the incision.

[0009] In addition, in order to solve the above-mentioned problem, a peeling incision method includes the following steps: a preparation step using the above-mentioned peeling incision device, setting the insulated electric wire in the peeling incision device, and positioning the cutter blade in an initial position away from the outer peripheral surface in the cross direction; a first incision step of moving the cutter blade until the contact detection unit detects contact between the outermost conductor and the cutter blade based on the variable capacitance; a second incision step of adjusting the position of the cutter blade in the cross direction to a position corresponding to the incision depth and making the incision when the contact detection unit detects the contact during the movement of the cutter blade in the first incision step; and a rotation step of rotating the mechanism part with the incision made in the insulated electric wire around the wire axis to extend the incision around the wire axis, thereby making it possible to remove the peeled portion. [Effects of the Invention]

[0010] According to the above-described stripping incision device and stripping incision method, it is possible to improve the incision accuracy when a thick electric wire or an insulated electric wire wound on a bobbin and stored is targeted. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic diagram showing a peeling incision device according to one embodiment; [Figure 2] 2 is a schematic diagram showing a coated electric wire to be cut by the peeling cutting device shown in FIG. 1.

[0023] FIG. [Figure 3] 3 is a cross-sectional view showing a cross section of the coated electric wire shown in FIG. 2 taken along line V11-V11 in FIG. 2. [Figure 4] 2 is a schematic side view showing a mechanical part of the cutting mechanism shown in FIG. 1 as viewed from the cutting rotation direction. FIG. [Figure 5] 2 is a schematic diagram showing how the contact detection unit shown in FIG. 1 detects contact of the cutter blade with the metal foil based on the variable capacitance between the metal foil and the cutter blade. FIG. [Figure 6]FIG. 7 is a schematic view showing the clamping portion shown in FIGS. 5 and 6. [Figure 7] FIG. 6 is a schematic circuit diagram illustrating a configuration for detecting contact of the cutter blade shown in FIG. 5. [Figure 8] 2 is a schematic flowchart showing a series of steps in a peeling notching method for making notches for peeling at the end of a coated electric wire using the peeling notching device shown in FIG. 1. [Figure 9] 9 is an explanatory diagram illustrating a part of the process in the peeling incision method shown in FIG. 8, using the peripheral structure of the cutter blade in the side view of FIG. 4. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of a peeling incision device and a peeling incision method will be described.

[0013] Fig. 1 is a schematic diagram showing a peeling incision device according to one embodiment. Fig. 2 is a schematic diagram showing an insulated electric wire to be incised by the peeling incision device shown in Fig. 1. Fig. 3 is a cross-sectional view showing a cross section of the insulated electric wire shown in Fig. 2 taken along line V11-V11 in Fig. 2.

[0014] First, the insulated electric wire 2 to be cut in this embodiment is a thick electric wire in which a conductor core wire 21 is covered with multiple layers of coating material, and is stored wound on a bobbin and used in high-voltage wiring harnesses for automobiles, etc. The coating material includes an inner coating 22 as an insulating layer made of insulating resin, a braid 23 as a conductor layer, a metal foil 24 as a conductor layer, and an outermost coating 25 as an insulating layer made of insulating resin. The stripping cutting device 1 makes a cut to a specified cut depth from the outer peripheral surface 2a of the insulated electric wire 2 as end processing, thereby making it possible to remove a stripped portion corresponding to the cut depth.

[0015] For example, the following types of incisions are possible. That is, one example of an incision is to specify the incision depth to the inner periphery of the metal foil 24 so that the outermost coating 25 and the metal foil 24 are the stripped portion, and to make an incision up to the inner periphery of the metal foil 24. In this example, after stripping, the inner coating 22 and the braid 23 that houses the core wire 21 are exposed at the end of the insulated electric wire 2. Another example of an incision is to specify the incision depth to the inner periphery of the inner coating 22 so that all coating material other than the core wire 21 is the stripped portion, and to make an incision up to the inner periphery of the inner coating 22. In this example, after stripping, the core wire 21 is exposed at the end of the insulated electric wire 2.

[0016] The stripping incision device 1 is capable of making such incisions in the insulated electric wire 2 and includes three cutting mechanisms 11 and a rotation mechanism 12. Each cutting mechanism 11 has a plurality of mechanism parts 11a (three in this embodiment) arranged around the wire axis 2b of the insulated electric wire 2, each corresponding to a corresponding one. These mechanism parts 11a make incisions to a specified incision depth from the outer peripheral surface 2a of the insulated electric wire 2. In this embodiment, the mechanism parts 11a of each of the three cutting mechanisms 11 are arranged at 120° intervals around the wire axis 2b. The rotation mechanism 12 rotates the three mechanism parts 11a, which have made incisions in the insulated electric wire 2, in a cutting rotation direction D11 around the wire axis 2b, thereby extending the incisions around the wire axis 2b. In this embodiment, the rotation mechanism 12 rotates the three cutting mechanisms 11 by 120° or more in the cutting rotation direction D11 around the wire axis 2b. This rotation connects the three cuts around the wire axis 2b to form a complete circle, allowing the peeled portion to be removed according to the specified cut depth.

[0017] The three cutting mechanisms 11 in this peeling incision device 1 have the same configuration as each other, including the above-mentioned mechanism portion 11a, and the configuration of one cutting mechanism 11 will be described below.

[0018] FIG. 4 is a schematic side view showing the mechanism portion of the cutting mechanism shown in FIG. 1 as viewed from the cutting rotation direction.

[0019] 1 and 4, the cutting mechanism 11 includes a cutter blade 111 and a moving mechanism 112 that constitute a mechanism portion 11a, and a contact detection unit 113 that detects contact between the cutter blade 111 and the outermost conductor that is shallowest from the outer peripheral surface 2a of the insulated electric wire 2. In this embodiment in which the insulated electric wire 2 shown in FIGS. 2 and 3 is to be cut, the outermost conductor is the metal foil 24.

[0020] The cutter blade 111 is a conductive, disk-shaped cutter member that is movable in a direction D12 that intersects the outer peripheral surface 2a of the insulated electric wire 2. In this embodiment, the cutter blade 111 is rotatably supported on a cutter frame 112b (described later) of the moving mechanism 112 around a cutter axis 111a that intersects the intersecting direction D12 along the electric wire axis 2b.

[0021] The moving mechanism 112 is a mechanism that moves the cutter blade 111 in the transverse direction D12. When the contact detection unit 113 detects contact with the metal foil 24 while the cutter blade 111 is moving, the moving mechanism 112 adjusts the position of the cutter blade 111 in the transverse direction D12 to a position corresponding to the cutting depth, and makes an incision in the insulated electric wire 2. In this embodiment, the moving mechanism 112 has a servo motor 112a that is capable of precise driving as a driving source. The moving mechanism 112 also has a cutter connecting frame 112b that is moved in the transverse direction D12 by the servo motor 112a and has the cutter blade 111 axially supported at its tip on the insulated electric wire 2 side. The moving mechanism 112 precisely moves the cutter blade 111 via the cutter connecting frame 112b using the servo motor 112a, so that the cutter blade 111 enters the outer peripheral surface 2b of the insulated electric wire 2 to a specified cutting depth.

[0022] As described above, the contact detection unit 113 is a part that detects the contact of the cutter blade 111 with the metal foil 24, and this contact detection is performed based on a variable capacitance between the metal foil 24 and the cutter blade 111, whose value changes depending on the movement of the cutter blade 111.

[0023] Fig. 5 is a schematic diagram showing how the contact detection unit shown in Fig. 1 detects contact of the cutter blade with the metal foil based on the variable capacitance between the metal foil and the cutter blade. Fig. 6 is a schematic diagram showing the clamp unit shown in Fig. 5 and Fig. 6, and Fig. 7 is a schematic circuit diagram showing the configuration for detecting contact of the cutter blade shown in Fig. 5.

[0024] The clamping portion 13 is a conductive member that holds the insulated electric wire 2 while contacting the outer peripheral surface 2a at a clamping position P12 that is spaced apart from the cutting position P11 of the cutter blade 111 in the length direction D13 of the insulated electric wire 2. One clamping portion 13 is provided for each of the three cutting mechanisms 11, and as shown in FIG. 6 , the pair of clamping portions 131, both of which are conductive, hold the insulated electric wire 2 by clamping it in the radial direction D14. Each clamping portion 131 has a V-shaped wire receiving recess 131a formed on the side facing the insulated electric wire 2. The pair of clamping portions 131 receive and hold the insulated electric wire 2 in the wire receiving recess 131a so that the inner surface of each wire receiving recess 131a contacts the outer peripheral surface 2a of the insulated electric wire 2.

[0025] As described above, the pair of clamping members 131 constituting the clamp unit 13 and the cutter blade 111 of each of the three cutting mechanisms 11 are electrically conductive. One of the pair of clamping members 131 is connected to the IN terminal 113a of the contact detector 113 of each of the three cutting mechanisms 11, and the cutter blade 111 of each cutting mechanism 11 is connected to the OUT terminal 113b of the corresponding contact detector 113. Through this connection, a clamp-side capacitor C1 is formed between the clamping member 131 connected to the IN terminal 113a of the clamp unit 13 and the metal foil 24, which is the outermost conductor of the insulated electric wire 2. The capacitance of this clamp-side capacitor C1 is a fixed capacitance whose value remains almost constant because the distance between the clamping member 131 and the metal foil 24 does not change during clamping. On the other hand, a cutter-side capacitor C2 is formed between the cutter blade 111 and the metal foil 24, and the capacitance of this cutter-side capacitor C2 is a variable capacitance whose value changes as the distance from the metal foil 24 changes due to the movement of the cutter blade 111. The variable capacitance becomes approximately zero when the cutter blade 111 comes into contact with the metal foil 24. In this embodiment, an electric circuit CR1 is formed by the IN terminal 113a, the OUT terminal 113b, the clamp-side capacitor C1, the cutter-side capacitor C2, and the metal foil 24 between the two capacitors in the contact detection unit 113. The contact detection unit 113 detects the variable capacitance of the cutter-side capacitor C2 by applying an AC voltage from the IN terminal 113a and the OUT terminal 113b using the clamping unit 131 of the clamp unit 13 and the cutter blade 111 as electrodes. Then, based on the detection result, specifically, when the variable capacitance of the cutter-side capacitor C2 becomes approximately zero, the contact detection unit 113 detects contact between the cutter blade 111 and the metal foil 24.

[0026] When the contact detector 113 detects contact while the cutter blade 111 is moving, the movement mechanism 112 of each cutting mechanism 11 adjusts the position of the cutter blade 111 in the cross direction D12 to position the cutter blade 111 at a position corresponding to the specified cutting depth. That is, if the specified cutting depth is up to the metal foil 24, the movement mechanism 112 stops the movement of the cutter blade 111 at the time of contact detection. Also, if the cutting depth is up to the braid 23, the movement of the cutter blade 111 is stopped after the contact detection by feeding the cutter blade 111 by the thickness of the metal foil 24. If the cutting depth is up to the inner coating 22, the movement of the cutter blade 111 is stopped after feeding the cutter blade 111 by the combined thickness of the metal foil 24 and the braid 23 from the time of contact detection. Furthermore, if the incision depth reaches the core wire 21, the cutter blade 111 is fed from the time of contact detection by an amount corresponding to the total thickness of the metal foil 24, the braid 23, and the inner coating 22, and then the movement of the cutter blade 111 is stopped. After three incisions of the specified incision depth have been made in the insulated electric wire 2 at 120° intervals around the wire axis 2b in this manner, the rotation mechanism 12 then rotates the mechanism part 11a including the cutter blade 111 by 120° or more around the wire axis 2b. This rotation extends the three incisions around the wire axis 2b and connects them to form an incision that extends all the way around the wire axis 2b. This incision formation makes it possible to remove the peeled portion at the end of the insulated electric wire 2 according to the specified incision depth.

[0027] Next, the peeling incision method for making incisions for peeling at the end of the insulated electric wire 2 using the peeling incision device 1 described above will be explained below with reference to another drawing, although some of the explanation will overlap with what has been explained so far.

[0028] Fig. 8 is a schematic flowchart showing the flow of a series of processes in a peeling incision method for making incisions for peeling at the end of an insulated electric wire using the peeling incision device shown in Fig. 1. Fig. 9 is an explanatory diagram for explaining a part of the processes in the peeling incision method shown in Fig. 8 by using the peripheral structure of the cutter blade in the side view of Fig. 4.

[0029] The process of the insulated electric wire 2 to be cut is started when the insulated electric wire 2 is prepared. When the process starts, a preparation step S11 is first executed. In the preparation step S11, the insulated electric wire 2 is set in the insulated electric wire cutting device 1, and the cutter blade 111 is positioned at an initial position P13 away from the outer circumferential surface 2a in the cross direction D12 in each of the mechanism parts 11a of the three cutting mechanisms 11. At this time, the insulated electric wire 2 is set in the insulated electric wire cutting device 1 by holding the insulated electric wire 2 in the clamp part 13.

[0030] Following the preparation step S11, a first cutting step S12 is executed in which the movement mechanism 112 moves the cutter blade 111 in the transverse direction D12 as follows. In this first cutting step S12, a cutter movement step S121 and a contact determination step S122 based on the variable capacitance of the cutter-side capacitor C2 are repeatedly executed. In the contact determination step S122, the contact detection unit 113 determines whether the variable capacitance of the cutter-side capacitor C2 is zero. If the variable capacitance is not zero (NO determination), the cutter blade 111 is not in contact with the metal foil 24, which is the outermost conductor, and therefore the cutter movement step S121 is repeated. If the variable capacitance is zero (YES determination), the cutter blade 111 is in contact with the metal foil 24, and therefore the process proceeds to the next second cutting step S13.

[0031] In the second cutting step S13, after the contact detection unit 113 detects contact between the cutter blade 111 and the metal foil 24, the position of the cutter blade 111 in the cross direction D12 is adjusted by the movement mechanism 112. Through this position adjustment, the cutter blade 111 is positioned to a position corresponding to the specified cutting depth t11 and makes an incision. As described above, if the specified cutting depth is up to the metal foil 24, the movement of the cutter blade 111 is stopped at the time of contact detection. Furthermore, if the cutting depth is up to the braid 23, the movement of the cutter blade 111 is stopped after the cutter blade 111 has been unwound by the thickness of the metal foil 24 from the time of contact detection. In the second cutting step S13, after the contact detection between the cutter blade 111 and the metal foil 24, the position of the cutter blade 111 is adjusted in this way and an incision is made.

[0032] After the second incision step S13 is performed for each of the three cutting mechanisms 11, the incisions are finally extended by the rotation step S14. In this rotation step S14, the mechanism parts 11a of the three cutting mechanisms 11, which have made incisions in the insulated electric wire 2, are rotated by the rotation mechanism 12 by 120° or more around the wire axis 2b. This rotation extends the three incisions around the wire axis 2b and connects them to form a complete incision around the wire axis 2b at the end of the insulated electric wire 2. By forming this complete incision, the peeled portion corresponding to the specified incision depth t11 can be removed, and this completes the series of processes in the peeling incision method. After this, the removable peeled portion is removed, exposing the interior. The peeled portion may be removed manually by an operator or using a dedicated removal device.

[0033] The peeling incision device 1 and the peeling incision method according to the embodiment described above can achieve the following effects. In other words, in this embodiment, when the cutter blade 111 makes a peeling incision, contact between the metal foil 24 (outermost conductor) and the cutter blade 111 is detected based on the variable capacitance of the cutter-side capacitor C2 between the metal foil 24 and the cutter blade 111. After this detection, the position of the cutter blade 111 is adjusted to a position corresponding to the specified incision depth t11, and an incision of the specified incision depth t11 is made. According to this configuration, the position at which the cutter blade 111 actually makes contact with the metal foil 24 of the insulated electric wire 2 serves as the reference for the subsequent feeding of the cutter blade 111. Setting such a feeding reference can reduce the influence of stacking tolerances related to the thickness of each insulated material, thereby improving incision accuracy, even when a thick electric wire is used. Furthermore, even when the target is a covered electric wire 2 that has become deformed or eccentric due to being wound around a bobbin and stored, the cutter blade 111 is actually brought into contact with the metal foil 24 before the wire is subsequently unwound, thereby suppressing the effects of deformation or eccentricity and improving the cutting accuracy. As described above, according to this embodiment, the cutting accuracy can be improved when a thick electric wire or a covered electric wire 2 that has been wound around a bobbin and stored is targeted. Furthermore, according to this embodiment, when a thick electric wire is targeted, by appropriately specifying the cutting depth t11, it is possible to perform a wide range of cutting up to the desired coating material without changing the device structure.

[0034] In this embodiment, a conductive clamp unit 13 is provided that holds the insulated electric wire 2 at a clamp position P12 away from the cutting position P11 of the cutter blade 111. The contact detection unit 113 detects the variable capacitance by applying a voltage to an electric circuit CR1 that includes the fixed capacitance of the clamp-side capacitor C1, the variable capacitance of the cutter-side capacitor C2, and the metal foil 24. The contact detection unit 113 then detects contact between the cutter blade 111 and the metal foil 24 based on the detection result of this variable capacitance. This configuration is preferable because it allows for effective detection of the variable capacitance by configuring the electric circuit CR1 that includes the fixed capacitance based on the conductive clamp unit 13, the variable capacitance based on the cutter blade 111, and the metal foil 24 of the insulated electric wire 2.

[0035] In this embodiment, the movement mechanism 112 has a servo motor 112a, which moves the cutter blade 111. According to this configuration, the cutter blade 111 is precisely moved by the servo motor 112a, thereby further improving the cutting accuracy.

[0036] The above-described embodiments merely show typical examples of the peeling incision device and the peeling incision method. The peeling incision device and the peeling incision method are not limited to these, and can be implemented in various modifications.

[0037] For example, in the above-described embodiment, the insulated electric wire 2 used in a high-voltage wire harness for an automobile or the like is exemplified as an example of the insulated electric wire to be cut for stripping. However, the insulated electric wire to be cut is not limited to this, and the specific mode of use is not limited thereto.

[0038] In the above-described embodiment, the insulated electric wire 2 is a thick electric wire in which the conductor core wire 21 is covered with multiple layers of coating material, as an example of the insulated electric wire to be cut for stripping. Examples of the multiple-layer coating material are an inner insulating resin coating 22, a conductor braid 23, a conductor metal foil 24, and an outermost insulating resin coating 25. However, the insulated electric wire to be cut is not limited to this, and the core wire may be covered with a single layer of resin coating. Even in the case of a thick electric wire, the specific layer structure of the multiple layers of coating material is not important. In the case of a simple insulated electric wire in which the core wire is covered with a single layer of resin coating, the outermost conductor that is shallowest from the outer circumferential surface is the core wire.

[0039] In the above-described embodiment, three cutting mechanisms 11 are exemplified as an example of the cutting mechanism, each having three mechanism parts 11a arranged in a one-to-one relationship at intervals of 120° around the wire axis 2b of the insulated electric wire 2. However, the cutting mechanism is not limited to this, and the specific number and arrangement of the mechanism parts can be set arbitrarily as long as one or more mechanism parts are arranged around the wire axis 2b of the insulated electric wire.

[0040] In the above-described embodiment, the stripping incision device 1 that holds the insulated electric wire 2 with the conductive clamp unit 13 is exemplified as an example of a stripping incision device. The contact detection unit 113 detects contact between the cutter blade 111 and the metal foil 24 based on the detection result of the fixed capacitance of the clamp-side capacitor C1, the variable capacitance of the cutter-side capacitor C2, and the variable capacitance in the electric circuit CR1 that includes the metal foil 24. However, the stripping incision device is not limited to this, and the specific manner in which the insulated electric wire is held and the specific manner in which contact between the cutter blade and the outermost conductor is detected are not limited to this. However, as described above, by using the electric circuit CR1 that includes the fixed capacitance of the clamp-side capacitor C1 while holding the insulated electric wire 2 with the conductive clamp unit 13, the variable capacitance of the cutter-side capacitor C2 can be effectively detected.

[0041] In the above-described embodiment, the clamp 13 is exemplified as an example of the clamp, which holds the insulated electric wire by clamping it between a pair of clamping portions 131. However, the clamp is not limited to this, and any specific holding mode can be set as long as it is conductive enough to hold the insulated electric wire.

[0042] In the above-described embodiment, the moving mechanism 112 that moves the cutter blade 111 using the servo motor 112a is exemplified as an example of the moving mechanism. However, the moving mechanism is not limited to this, and a general motor, cylinder mechanism, or the like may be used as the drive source. However, as described above, by using the servo motor 112a as the drive source of the moving mechanism 112, the cutting accuracy can be further improved. [Explanation of symbols]

[0043] 1 Peeling incision device 2. Insulated wire 2a Outer surface 2b Wire shaft 11 Cutting mechanism 11a Mechanical part 12 Rotation mechanism 13 Clamp section 21 Core Wire 22 Internal coating 23 Braid 24 Metal foil 25 Outermost coating 111 Cutter blade 111a Cutter shaft 112 Moving mechanism 112a servo motor 112b Cutter connecting frame 113 Contact detection unit 113a IN terminal 113b OUT terminal 131 Clamping part 131a Wire receiving recess C1 Clamp side capacitor C2 Cutter side capacitor CR1 Electrical Circuit D11 Cutting rotation direction D12 Crossing direction D13 Length direction D14 Radial direction P11 Cutting position P12 Clamp position P13 Initial position S11 Preparation process S12 First cutting process S13 Second cutting process S14 Rotation process S121 Cutter movement process S122 Contact determination process t11 cutting depth

Claims

1. a plurality of cutting mechanisms each having one mechanism part arranged around the axis of an insulated electric wire in which a core wire is covered with an insulating layer or in which the core wire is covered with the insulating layer and one or more conductor layers laminated inside the insulating layer, and each of the mechanism parts makes a cut from the outer circumferential surface of the insulated electric wire to a specified cutting depth; a rotation mechanism that rotates the mechanism part that has made the incision in the insulated electric wire around the electric wire axis to extend the incision around the electric wire axis, thereby removing a peeled portion according to the incision depth, Each of the plurality of cutting mechanisms a conductive cutter blade that is movable in a direction intersecting the outer circumferential surface; a contact detection unit that individually detects contact between the outermost conductor and the cutter blade based on a variable capacitance between the outermost conductor that is shallowest from the outer circumferential surface of the insulated electric wire and the cutter blade, the value of which changes in accordance with movement of the cutter blade; a movement mechanism that configures the mechanism portion together with the cutter blade and moves the cutter blade in the cross direction, and when the contact detection unit detects the contact while the cutter blade is moving, adjusts the position of the cutter blade in the cross direction to individually position the cutter blade to a position according to the cutting depth, and makes the cut; A peeling incision device comprising:

2. a conductive clamping portion that holds the insulated electric wire while contacting the outer circumferential surface at a clamping position that is spaced apart from the cutting position of the cutter blade in the length direction of the insulated electric wire, The peeling incision device according to claim 1, characterized in that the contact detection unit detects the variable capacitance by applying a voltage to an electrical circuit including the fixed capacitance between the clamp unit and the outermost conductor, the variable capacitance, and the outermost conductor, using the clamp unit and the cutter blade as electrodes, and detects the contact based on the detection result.

3. 2. The peeling incision device according to claim 1, wherein the movement mechanism has a servo motor and is a mechanism for moving the cutter blade by the servo motor.

4. The peeling cutting device described in Claim 1, characterized in that the moving mechanism stops the movement of the cutter blade at the time of contact detection by the contact detection unit if the cutting depth is up to the outermost conductor, and stops the movement of the cutter blade after further extending the cutter blade by the remaining length from the time of contact detection if the cutting depth is deeper than the outermost conductor.

5. A preparation step of using the peeling incision device according to any one of claims 1 to 4, setting the insulated electric wire in the peeling incision device, and positioning the cutter blade in an initial position away from the outer circumferential surface in the cross direction; a first cutting step of moving the cutter blade until the contact between the outermost conductor and the cutter blade is detected by the contact detection unit based on the variable capacitance; a second cutting step of adjusting a position of the cutter blade in the cross direction to a position corresponding to the cutting depth and making the cut when the contact is detected by the contact detection unit during movement of the cutter blade in the first cutting step; a rotating step of rotating the mechanism part with the incision made in the insulated electric wire around the electric wire axis to extend the incision around the electric wire axis, thereby making it possible to remove the peeled portion; A peeling incision method comprising:

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