Apparatus and method for forming cutouts for peeling

Abstract

Each of the cutting mechanisms of the device for forming the cutout for peeling comprises an electrically conductive cutout-forming cutting edge; a contact detection section configured to detect a contact between the outermost conductor of the coated electric wire and the notch-forming cutting blade based on a current flowing through an electric circuit including the power supply connection section, the outermost conductor, and the notch-forming cutting blade; and a cutout-forming moving mechanism configured to move the cutout-forming cutting blade in a crossing direction crossing the outer peripheral surface, in which the cutout-forming moving mechanism is configured to adjust a position of the cutout-forming cutting blade in the crossing direction when contact is detected by the contact detection portion during movement of the cutout-forming cutting blade, and to move the cutout-forming cutting blade in the crossing direction when the contact is detected by the contact detection portion during movement of the cutout-forming cutting blade. And positioning the cut-forming cutting edge to a position corresponding to the specified cut depth to form a cut therein.

Description

Technical Field

[0001] The present invention relates to an apparatus and method for forming an incision for peeling, wherein an incision is formed from the outer peripheral surface of a coated electric wire for peeling the coated electric wire. Background Art

[0002] As one of the conventional processes for processing the end of a coated electric wire, a peeling process is widely used, in which the coating is removed to expose an inner conductor such as a core wire. In addition, a device for forming a peeling cut is known, which forms a cut in the coated electric wire from the outer peripheral surface of the coated electric wire so that the peeled area can be removed (see, for example, Patent Document 1). The device for forming a peeling cut according to this type of Patent Document 1 includes a pair of V-shaped cutting blades, which are configured to sandwich the coated electric wire between them to bite into the outer peripheral surface, and then rotate around the wire axis of the coated electric wire to form the peeling cut.

[0003] Reference List

[0004] Patent Literature

[0005] Patent Document 1: JP 2000-350324 A Summary of the invention

[0006] The covered electric wire includes a thick electric wire including multiple layers of covering materials, such as an inner covering, a braid, a metal foil, and an outer covering, arranged around a core wire and stacked on each other. In most cases, this type of device for forming a peeling incision is constructed so that the wire axis is used as a reference for the movement of the V-shaped cutting blade when the covered electric wire is clamped by the V-shaped cutting blade, wherein the target position to be reached by the V-shaped cutting blade is determined as the distance from the wire axis. Then, the V-shaped cutting blade is moved toward the wire axis to clamp the covered electric wire so that the V-shaped cutting blade bites into the incision depth corresponding to the determined target position. For example, in the case of forming an incision in the thick electric wire as described above, the target position of the V-shaped cutting blade is determined as the distance from the wire axis, which is obtained by subtracting the thickness of the covering material to be removed from the radius of the core wire and the sum of the respective thicknesses of the multiple layers of covering materials. In the case of thick wires, the tolerance of the target position of the V-shaped cutting blade based on the wire axis tends to be large because the tolerance is a cumulative tolerance obtained from the tolerance of the core wire radius and the tolerance of the thickness of the coating material other than the coating material removed. This may result in low movement accuracy of the V-shaped cutting blade. For example, in the case of forming a cut in a thick wire to the desired coating material included in the thick wire, due to the low movement accuracy of the V-shaped cutting blade, the cut may be formed too deep, so that the cut may extend into the coating material further inside that should be kept untouched. The cut may also be formed too shallow, so that the cut may not be sufficient for peeling.

[0007] In addition, many coated electric wires are wound on bobbins for storage. During such storage, the core wire and / or the coating may be deformed and flattened due to the load of their own weight, or eccentricity may occur in which the axis of the wire may deviate from the center of the coated electric wire. When the cut formation is applied to a coated electric wire having such deformation and / or eccentricity by the above-mentioned type of device for forming a peeling cut, the rotation of a pair of V-shaped cutting blades around the axis of the wire may cause the depth of the cut obtained by the cutting blades in the direction around the axis of the wire to vary. As a result, the obtained cut may be too deep in some areas along the direction around the axis of the wire, thereby possibly cutting into a more inner portion that should not be touched, wherein the cut may be too shallow in some other areas along the direction around the axis of the wire, so that the wire may not be fully cut into.

[0008] Therefore, the above-mentioned type of device for forming a peeling incision, that is, a device having a pair of V-shaped cutting blades that clamp a coated electric wire and then rotate around the axis of the electric wire, has a problem that the accuracy of incision formation may be reduced when the incision is formed in a thick electric wire and in a coated electric wire wound on a bobbin for storage.

[0009] Therefore, the present invention focuses on the above-mentioned problems, and an object of the present invention is to provide an apparatus and method for forming a peeling cut that can improve the accuracy of cut formation when forming a cut in a thick electric wire and / or a covered electric wire wound on a bobbin for storage.

[0010] In order to achieve the above-mentioned object, a device for forming an incision for peeling comprises: one or more cutting mechanisms, the cutting mechanisms comprising one or more incision forming mechanism parts, each of the one or more cutting mechanisms is associated with one of the one or more incision forming mechanism parts, wherein the one or more incision forming mechanism parts are constructed to be arranged around the wire axis of a covered wire, wherein the covered wire comprises a core wire covered by an insulating layer or by an insulating layer and one or more conductor layers, wherein the one or more conductor layers are stacked on the inner side of the insulating layer, wherein each of the one or more cutting mechanisms a cutting mechanism configured to form one or more cuts in the covered electric wire starting from the outer peripheral surface of the covered electric wire to a specified cut depth by a corresponding one of the one or more cut forming mechanism parts; a rotating mechanism configured to rotate the one or more cut forming mechanism parts around the electric wire axis in a state where the one or more cut forming mechanism parts have formed the one or more cuts in the covered electric wire and thereby extend the one or more cuts in a direction around the electric wire axis so that a peeled area corresponding to the cut depth can be removed; and A power supply connection part, the power supply connection part is configured to connect a power supply to the outermost conductor in the covered electric wire at a connection position, the connection position is located on a side closer to the end of the covered electric wire than a cut formation position of the covered electric wire where one or more cuts are formed by the one or more cutting mechanisms, the outermost conductor is located at a minimum depth from the outer peripheral surface in the covered electric wire; wherein each of the one or more cutting mechanisms comprises: a conductive cut formation cutting blade, the cut formation cutting blade being movable in a cross direction intersecting the outer peripheral surface; a contact detection part, the contact detection part being configured to detect the contact based on the flow through the covered electric wire. a cutting edge detecting mechanism for detecting contact between the cutting edge and the cutting edge by detecting the current of a circuit including the power connection portion, the outermost conductor and the cutting edge; and a cutting forming moving mechanism, which is configured to move the cutting edge in the crossing direction, wherein, when the contact is detected by the contact detection portion during the movement of the cutting edge, the cutting forming moving mechanism is configured to adjust the position of the cutting edge in the crossing direction and position the cutting edge to a position corresponding to the cutting depth so as to form more than one cutting therein.

[0011] In order to achieve the above-mentioned object, the present invention also provides a method for forming an incision for peeling, comprising: a preparation step, placing the coated electric wire in the device as described above, and positioning the incision forming cutting blade at an initial position by the device, wherein the initial position is spaced apart from the outer peripheral surface in the crossing direction; a power supply connecting step, connecting the power supply to the outermost conductor on the side of the coated electric wire closer to its end through the power supply connecting part; a first incision forming step, moving the incision forming cutting blade until contact between the incision forming cutting blade and the outermost conductor is detected based on the current; a second incision forming step, in accordance with the incision forming cutting blade, The first incision forming step comprises: adjusting the position of the incision forming cutting blade in the cross direction and positioning the incision forming cutting blade at a position corresponding to the incision depth when contact is detected by the contact detection unit during movement of the incision forming cutting blade to form one or more incisions therein; and a rotating step, in a state where the one or more incision forming mechanism parts have formed the one or more incisions in the coated electric wire, rotating the one or more incision forming mechanism parts around the electric wire axis, and thereby extending the one or more incisions in the direction around the electric wire axis, so that the peeled area can be removed.

[0012] With the apparatus and method for forming an incision for peeling, it is possible to improve the accuracy of incision formation when forming an incision in a thick electric wire and / or a coated electric wire wound on a bobbin for storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram showing a device for forming an incision for peeling according to an embodiment;

[0014] Figure 2 It is shown that Figure 1 A schematic diagram of a covered electric wire in which an incision is formed by a device for forming an incision for peeling shown in FIG.

[0015] Figure 3 Show according to Figure 2 The covered wire is along Figure 2 A cross-sectional view along line V11-V11 shown;

[0016] Figure 4 Shows the view along the cutting rotation direction according to Figure 1 A schematic side view of a cutout forming mechanism portion of a cutting mechanism and a power supply mechanism portion of a power supply connecting portion;

[0017] Figure 5 Shown is the expression through Figure 1 A schematic flow chart of a series of processes of a method for forming a peeling incision at an end of a coated electric wire by a device for forming a peeling incision shown in FIG.

[0018] Figure 6 Shown for use Figure 4 The side view of the incision forming cutting edge and the peripheral structure of the power cutting edge are described according to Figure 5 An illustrative view of some processes of forming a peeling method using an incision.

[0019] Reference Mark List

[0020] 1Device for forming an incision for peeling

[0021] 2-coated wire

[0022] 2a Outer surface

[0023] 2b Wire axis

[0024] 11 Cutting mechanism

[0025] 11a Notch forming mechanism

[0026] 12 Rotation mechanism

[0027] 13 Power supply connection

[0028] 13a Power supply mechanism

[0029] 13b power supply

[0030] 21 core wire

[0031] Covered within 22

[0032] 23 Braid

[0033] 24 metal foil

[0034] 25 outermost covering

[0035] 111 incision forms cutting edge

[0036] 111a, 131a tool axis

[0037] 112 Incision forming moving mechanism

[0038] 112a, 132a servo motor

[0039] 112b tool connection frame

[0040] 113 contact detection unit

[0041] 131 Power Cutting Blade

[0042] 132 Power supply moving mechanism

[0043] 132b power connection frame

[0044] CR1 Circuit

[0045] D11 cutting rotation direction

[0046] D12 Cross Direction

[0047] P11 incision formation position

[0048] P12 connection location

[0049] P13, P14 initial position

[0050] S11 Preparation Steps

[0051] S12 Power Connection Steps

[0052] S13 First incision forming step

[0053] S14 Second incision forming step

[0054] S15 Rotation Steps

[0055] S131 Tool movement steps

[0056] S132 Contact determination step

[0057] T11 cut depth DETAILED DESCRIPTION

[0058] Hereinafter, embodiments of an apparatus and method for forming an incision for peeling will be described.

[0059] Figure 1 A schematic diagram showing an apparatus for forming an incision for skin peeling according to an embodiment. Figure 2 A schematic diagram of the covered wire is shown, which can be obtained by Figure 1 The incision is formed on the coated electric wire by using the device for forming the incision for peeling, and Figure 3 Show according to Figure 2 The covered wire is along Figure 2 A cross-sectional view along line V11 - V11 is shown.

[0060] First, the coated electric wire 2 formed by the application cut according to the present embodiment is a thick electric wire including a multi-layer coating material and a conductive core wire 21 covered by the multi-layer coating material. The coated electric wire 2 is wound on a bobbin for storage, and is used, for example, for a high-voltage wiring harness of an automobile. As a coating material, the coated electric wire 2 includes: an inner coating 22 as an insulating layer made of an 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 an insulating resin. In order to process the end of the coated electric wire 2, the device 1 for forming the peeling cut is constructed to form one or more cuts from the outer peripheral surface 2a of the coated electric wire 2 to a specified cut depth, whereby the peeled area corresponding to the cut depth is removable.

[0061] For example, the following incision formation may be performed. For example, the following incision formation process may be performed: the depth extending to the inner periphery of the metal foil 24 is designated as the incision depth, so that the outermost coating 25 and the metal foil 24 are defined as a peeling area, wherein one or more incisions extending to the inner periphery of the metal foil 24 are formed. In this example, after peeling, the braid 23 will be exposed at the end of the coated electric wire 2, and the braid 23 accommodates the inner coating 22 and the core wire 21 on the inside. In addition, as another example, the following incision formation process may be performed: the depth extending to the inner periphery of the inner coating 22 is designated as the incision depth, so that all the coating materials except the core wire 21 are defined as a peeling area, wherein one or more incisions extending to the inner periphery of the inner coating 22 are formed. In this example, after peeling, the core wire 21 will be exposed at the end of the coated electric wire 2.

[0062] The device 1 for forming an incision for peeling is capable of forming such an incision in a coated electric wire 2, and includes three cutting mechanisms 11 and a rotating mechanism 12. The three cutting mechanisms 11 are arranged to include a plurality of incision forming mechanism parts 11a (three incision forming mechanism parts 11a in the present embodiment) in a one-to-one manner, that is, each of the three cutting mechanisms 11 is associated with a incision forming mechanism part 11a, wherein the incision forming mechanism part 11a is arranged around the wire axis 2b of the coated electric wire 2. Each cutting mechanism 11 is constructed to form one or more incisions from the outer peripheral surface 2a of the coated electric wire 2 to a specified incision depth using the corresponding incision forming mechanism part 11a. In the present embodiment, the incision forming mechanism parts 11a of the three cutting mechanisms 11 are arranged around the wire axis 2b and spaced apart from each other at an angle of 120°. The rotating mechanism 12 is configured to rotate the three incision forming mechanism parts 11a around the wire axis 2b in the cutting rotation direction D11 in a state where the incision forming mechanism part 11a has formed one or more incisions in the coated wire 2, and thus one or more incisions extend in the cutting rotation direction D11 around the wire axis 2b. In the present embodiment, the rotating mechanism 12 rotates the three cutting mechanisms 11 around the wire axis 2b in the cutting rotation direction D11 by an angle greater than or equal to 120°. This rotation connects the incisions at three positions in the direction around the wire axis 2b to obtain one incision extending over the entire circumference of the coated wire 2, thereby removing the peeling area corresponding to the specified incision depth. In addition, the power supply connection part 13 is configured to connect the power supply 13b to the outermost conductor through a single power supply mechanism part 13a, wherein the outermost conductor is located at a position with the smallest depth from the outer peripheral surface 2a in the coated wire 2.

[0063] In the device 1 for forming an incision for peeling, three cutting mechanisms 11 including the incision forming mechanism part 11a are constructed identically. Hereinafter, the construction of the cutting mechanism 11 and the single power supply mechanism part 13a will be described, wherein the single power supply mechanism part 13a is only one initially provided.

[0064] Figure 4 Shows the view along the cutting rotation direction according to Figure 1 A schematic side view of a cutout forming mechanism portion of a cutting mechanism and a power supply mechanism portion of a power supply connecting portion.

[0065] like Figure 1 and Figure 4 As shown, the cutting mechanism 11 includes a cut-forming cutting blade 111, a cut-forming moving mechanism 112, and a contact detection portion 113. The cut-forming cutting blade 111 and the cut-forming moving mechanism 112 form a cut-forming mechanism portion 11a. The contact detection portion 113 is configured to detect contact between the outermost conductor of the coated electric wire 2 and the cut-forming cutting blade 111. Figure 2 and Figure 3 In the present embodiment in which the covered electric wire 2 is cut, the outermost conductor is the metal foil 24 .

[0066] The cutting blade 111 is a conductive disc-shaped cutting member that can move in the intersecting direction D12 intersecting the outer peripheral surface 2a of the coated electric wire 2. According to the present embodiment, the moving mechanism 112 includes a cutter frame 112b as described below, wherein the cutting blade 111 is mounted to the cutter frame 112b so that the cutting blade 111 can pivot around a cutter axis 111a extending along the electric wire axis 2b and intersecting the intersecting direction D12.

[0067] The cut forming moving mechanism 112 is configured to move the cut forming cutting blade 111 in the cross direction D12. In addition, when the contact detection unit 113 detects the contact between the cut forming cutting blade 111 and the metal foil 24 during the movement of the cut forming cutting blade 111, the cut forming moving mechanism 112 adjusts the position of the cut forming cutting blade 111 in the cross direction D12 and positions the cut forming cutting blade 111 at a position corresponding to the cut depth. By such positioning after the contact detection, a cut corresponding to the cut depth is formed in the coated electric wire 2. The cut forming moving mechanism 112 according to the present embodiment includes a servo motor 112a as a driving source, wherein the servo motor 112a can be driven accurately. In addition, the cut forming moving mechanism 112 includes a cutter connection frame 112b, which is driven by the servo motor 112a in the cross direction D12, wherein the cut forming cutting blade 111 is pivotally mounted to the end of the cutter connection frame 112b facing the coated electric wire 2. The slit forming moving mechanism 112 accurately moves the slit forming cutting blade 111 via the cutter coupling frame 112b by a servo motor 112a to move the slit forming cutting blade 111 into the outer peripheral surface 2a of the coated electric wire 2 to a designated slit depth.

[0068] As described above, the contact detection unit 113 is configured to detect the contact between the incision forming cutting blade 111 and the metal foil 24. The contact detection is performed based on whether the current flows from the power supply 13b connected to the power supply connection unit 13 described later through the contact between the metal foil 24 and the incision forming cutting blade 111 to form the circuit CR1. The detection of the current by the contact detection unit 113 can be performed by detecting the current flowing through the circuit CR1 using an ammeter or other sensor. The detection can also be performed by opening / closing the contacts of the relay using the flow of current. For the current detection, various conventional detection methods can be used.

[0069] The power connection portion 13 is configured to connect a power source 13b to the metal foil 24 in the covered electric wire 2 at a connection position P12 located on a side of the covered electric wire 2 closer to its end than a cutout forming position P11 of the covered electric wire 2 for forming one or more cuts therein by the cutting mechanism 11. The power connection portion 13 includes a power source 13b and a power source mechanism portion 13a for connecting the power source 13b to the metal foil 24 (outermost conductor) of the covered electric wire 2.

[0070] The power source 13b is a DC power source connected to the notch forming cutting blade 111 and the power source mechanism portion 13a of each of the three cutting mechanisms 11. The negative side of the power source 13b is connected to the notch forming cutting blade 111, wherein the positive side of the power source 13b is connected to the power source mechanism portion 13a.

[0071] The power supply mechanism portion 13a includes a power supply cutting blade 131 and a power supply moving mechanism 132. The power supply cutting blade 131 is a disc-shaped cutting member that is roughly similar to the incision forming cutting blade 111. The power supply moving mechanism 132 includes a power supply connecting frame 132b as described below, wherein the power supply cutting blade 131 is mounted to the power supply connecting frame 132 so as to be rotatable around a tool axis 131a extending along the electric wire axis 2b and intersecting the intersection direction D12.

[0072] The power moving mechanism 132 is configured to move the power cutting blade 131 in the intersecting direction D12 intersecting the outer peripheral surface 2a of the coated electric wire 2. The power moving mechanism 132 moves the power cutting blade 131 in the intersecting direction D12 so that the power cutting blade 131 cuts into the outer peripheral surface 2a, thereby making contact with the metal foil 24 (outermost conductor). According to the present embodiment, the power moving mechanism 132 includes a servo motor 132a as a driving source, wherein the servo motor 132a can be driven accurately. In addition, the power moving mechanism 132 includes a power connection frame 132b, which is driven by the servo motor 132a in the intersecting direction D12, wherein the power cutting blade 131 is pivotally mounted to the end of the power connection frame 132 facing the coated electric wire 2. The power supply moving mechanism 132 accurately moves the power supply cutting blade 131 via the power supply connecting frame 132b by the servo motor 132a so that the power supply cutting blade 1311 bites into the coated electric wire 2 until the metal foil 24 and comes into contact therewith. This contact between the power supply cutting blade 131 and the metal foil 24 connects the power supply 13b to the metal foil 24.

[0073] When the notch forming cutting blade 111 of each cutting mechanism 11 cuts into the metal foil 24 in a state where the power source 13b is connected to the metal foil 24, a circuit CR1 including the power source connection portion 13, the metal foil 24 and the notch forming cutting blade 111 is formed, so that current flows through the circuit CR1. The contact between the notch forming cutting blade 111 of each cutting mechanism 11 and the metal foil 24 is detected by the fact that the contact detection portion 113 detects the current. After this detection, the notch forming moving mechanism 112 adjusts the position of the notch forming cutting blade 111 in each cutting mechanism 11 to position it to a position corresponding to a specified notch depth, thereby forming a notch of the notch depth in the coated electric wire 2.

[0074] When the cuts have been made for the three cutting mechanisms 11, the rotating mechanism 12 rotates the cut forming mechanism portion 11a around the wire axis 2b to extend the cut in a direction around the wire axis 2b so that a peeled area corresponding to a specified cut depth can be removed.

[0075] Next, a method of forming a peeling incision will be described, wherein a peeling incision is formed at the end of a coated electric wire 2 using the apparatus 1 for forming a peeling incision as described above. Although the following description includes some repetitions of the above description, the following description will be made with reference to other drawings.

[0076] Figure 5 Shown means through Figure 1 The illustrated apparatus for forming a peeling incision is a schematic flowchart of a series of processes of a method for forming a peeling incision at an end portion of a coated electric wire.

[0077] Figure 6 Shown for use Figure 4 The side view of the incision forming cutting edge and the peripheral structure of the power cutting edge are described according to Figure 5 An illustrative view of some processes of forming a peeling method using an incision.

[0078] according to Figure 5 The process of the method for forming the peeling incision starts when the covered electric wire 2 in which the incision is to be formed is prepared. When a series of processes starts, first, the preparation step S11 is performed. In the preparation step S11, the covered electric wire 2 is placed in the device 1, and the three incision forming cutting blades 111 are positioned in the initial position P13, wherein the initial position P13 is spaced apart from the outer peripheral surface 2a of the covered electric wire 2. In addition, in the present embodiment, in this preparation step S11, one power supply cutting blade 131 is also positioned in the initial position P14 separated from the outer peripheral surface 2a.

[0079] After the preparation step S11, a power connection step S12 is performed through the power connection portion 13. In the power connection step S12, the power source 13b is connected at the connection position P12 of the end portion of the coated electric wire 2 through the power connection portion 13. As described above, the power source 13b is connected by cutting the power cutting blade 131 from the outer peripheral surface 2a to the metal foil 24 through the power moving mechanism 132. At this time, the cutting amount of the power cutting blade 131 has a cutting amount that is preset according to the thickness of the outermost coating 25.

[0080] Next, the first incision forming step S13 is performed, in which the incision forming moving mechanism 112 moves the incision forming cutting blade 111 as follows. In this first incision forming step S13, the tool moving step S131 in the incision forming position P11 and the contact determination step S132 based on the current detection in the circuit CR1 are repeated. In the contact determination step S132, the contact detection unit 113 determines whether there is a current flowing through the circuit CR1 by the energization caused by the contact between the incision forming cutting blade 111 and the metal foil 24. If no current is detected (determined as "No"), since the incision forming cutting blade 111 is not in contact with the metal foil 24 as the outermost conductor, the tool moving step S131 is repeated. If the current is detected (determined as "Yes"), since the incision forming cutting blade 111 is in contact with the metal foil 24, the process proceeds to the subsequent second incision forming step S14.

[0081] In the second incision forming step S14, after the contact detection unit 113 detects the contact between the incision forming cutting blade 111 and the metal foil 24, the position of the incision forming cutting blade 111 in the cross direction D12 is adjusted to position the incision at a position corresponding to the specified incision depth t11. As described above, when the specified incision depth t11 reaches the metal foil 24, the incision forming cutting blade 111 stops moving at the contact detection point. In addition, if the incision depth t11 reaches the braid 23, the movement of the incision forming cutting blade 111 is stopped after the cutting blade 111 is fed by the thickness of the metal foil 24 from the contact detection point. In the second incision forming step S14, after the contact detection of the incision forming cutting blade 111 and the metal foil 24 is performed, the position of the incision forming cutting blade 111 is adjusted to form the incision.

[0082] After each of the three cutting mechanisms 11 has performed the second incision forming step S14, the incision is finally extended according to the rotation step S15. In the rotation step S15, in a state where the incision forming mechanism part 11a has formed an incision in the coated electric wire 2, the incision forming mechanism part 11a of the three cutting mechanisms 11 is rotated by an angle greater than or equal to 120° around the electric wire axis 2b by the rotation mechanism 12. By this rotation, the incisions at three positions extend in the direction around the electric wire axis 2b to connect to each other, so that a incision extending over the entire circumference of the coated electric wire 2 in the direction around the electric wire axis 2b is formed at the end of the coated electric wire 2. Forming this incision over the entire circumference makes the peeled area corresponding to the specified incision depth t11 removable, wherein a series of processes of the method for forming the peeling incision are terminated here. Thereafter, the removable peeled area is removed to expose its interior. The peeled area can be removed manually by an operator, or can be removed using a dedicated removal device.

[0083] The apparatus 1 and method for forming a peeling incision according to the above-described embodiment can have one or more effects as follows: According to the present embodiment, in order to form one or more peeling incisions by the incision forming cutting blade 111, the contact between the metal foil 24 (outermost conductor) and the incision forming cutting blade 111 is detected based on the current flowing through the circuit CR1 including the power supply connection portion 13, the metal foil 24 and the incision forming cutting blade 111. After the detection, the position of the incision forming cutting blade 111 is adjusted to position the incision forming cutting blade 111 to a position corresponding to a specified incision depth t11 for forming one or more incisions at the incision depth t11. According to this configuration, the position at which the incision forming cutting blade 111 has actually come into contact with the metal foil 24 of the coated electric wire 2 becomes a reference, and then the incision forming cutting blade 111 is advanced forward from the position serving as the reference. By defining the reference for advancing forward as described above, the influence of the accumulated thickness tolerance of each coating material can be suppressed, thereby improving the accuracy of incision formation, even for forming an incision in a thick electric wire. Furthermore, even for the covered electric wire 2 having deformation and / or eccentricity caused by winding and storage on a bobbin, since the incision forming cutting blade 111 is advanced after the incision forming cutting blade 111 is actually brought into contact with the metal foil 24, the influence of the deformation and / or eccentricity can be suppressed, thereby improving the accuracy of incision formation. In this way, the present embodiment can improve the accuracy of incision formation when forming an incision in a thick electric wire wound on a bobbin for storage and / or in the covered electric wire 2. Furthermore, for the thick electric wire, according to the present embodiment, the specified incision depth t11 can be appropriately variably selected, which allows one or more incisions to be formed in a desired coating material without changing the device structure, wherein the desired coating material can be selected within a wide range.

[0084] Here, according to the present embodiment, the slit forming moving mechanism 112 includes a servo motor 112a and is configured to move the slit forming cutting blade 111 by the servo motor 112a. This configuration can further improve the accuracy of slit forming by accurately moving the slit forming cutting blade 111 by the servo motor 112a.

[0085] Furthermore, in the present embodiment, the power connection portion 13 includes: a conductive power cutting blade 131 electrically connected to the power supply 13b; and a power moving mechanism 132 for moving the power cutting blade 131 and cutting into the outer peripheral surface 2a to contact the metal foil 24. According to this configuration, the power supply 13b can be effectively connected by cutting into the outer peripheral surface 2a of the coated electric wire 2 by the power cutting blade 131 to contact the metal foil 24. At this time, the connection position P12 of the power supply 13b is located closer to the end side than the incision formation position P11 by the cutting mechanism 11 due to the cutting of the power cutting blade 131, and since it becomes an object of excision after peeling, etc., there is no need to consider the incision mark when the electric wire is connected.

[0086] In addition, in this embodiment, the power moving mechanism 132 has a servo motor 132a to move the power cutting blade 131. According to this configuration, the power cutting blade 131 is accurately moved by the servo motor 132a, and the cutting accuracy of the power connection can be further improved.

[0087] It should be noted that the above-mentioned embodiment only shows a representative configuration of the device and method for forming the incision for peeling. The device and method for forming the incision for peeling are not limited thereto, but can be modified and implemented in various ways.

[0088] For example, the above embodiment shows the covered electric wire 2 for example, which is used in a high voltage harness of an automobile, as an example of a covered electric wire in which a cut for peeling is formed. However, the covered electric wire formed by the cut is not limited thereto, but the covered electric wire can be used in any specific manner.

[0089] As an example of a covered electric wire in which a cut for peeling is formed, the above embodiment also shows a covered electric wire 2 in the form of a thick electric wire, which includes a conductive core wire 21 covered by a multi-layer covering material. As an example of a multi-layer covering material as described above, the present embodiment shows an inner covering 22 of an insulating resin, a conductive braid 23, a conductive metal foil 24, and an outermost covering 25 of an insulating resin. However, the covered electric wire formed by applying the cut is not limited to this, but may include a core wire covered by a single-layer resin covering, and any specific layer structure, for example, may be used for the multi-layer covering material, even for a thick electric wire. In the case of a simple covered electric wire including a core wire covered by a single-layer resin covering, the core wire is the outermost conductor with the minimum depth from the outer peripheral surface.

[0090] As an example of the cutting mechanism, the above embodiment shows three cutting mechanisms 11 including three cutout forming mechanism portions 11a in a one-to-one manner, that is, each cutting mechanism 11 is associated with one mechanism portion 11a, wherein the cutout forming mechanism portions 11a are arranged at intervals of 120° around the wire axis 2b of the coated electric wire 2. However, the cutting mechanism is not limited thereto, but any specific number of cutting mechanisms and any specific arrangement may be selected for the cutting mechanism as long as more than one mechanism portion is arranged around the wire axis of the coated electric wire.

[0091] As an example of the cut-forming moving mechanism, the above embodiment also shows a cut-forming moving mechanism 112, which moves the cut-forming cutting blade 111 by a servo motor 112a. However, the cut-forming moving mechanism is not limited to this, but can select, for example, a motor or a cylinder mechanism that is generally used as a driving source. However, as described above, by using the servo motor 112a as a driving source for the cut-forming moving mechanism 112, the accuracy of the cut-forming can be further improved.

[0092] In addition, in the above-mentioned embodiment, as an example of a power supply connection portion, a power supply connection portion 13 is illustrated, which connects the power supply 13b by causing the power supply cutting blade 131 connected to the power supply 13b to cut into the outer peripheral surface 2a and contact the metal foil 24 (outermost conductor) through the power supply moving mechanism 132. However, the power supply connection is not limited to this, and as long as the power supply is connected to the outermost conductor of the coated electric wire at a position closer to the end than the cutting position by the cutting mechanism, the specific connection mechanism can adopt any mechanism. However, by cutting the power supply cutting blade 131 into the outer peripheral surface 2a of the coated electric wire and contacting the metal foil 24, the power supply 13b can be effectively connected as described above.

[0093] In addition, in the above-mentioned embodiment, as an exemplary power supply moving mechanism, the power supply moving mechanism 132 that moves the power supply cutting blade 131 by the servo motor 132a is illustrated. However, the moving mechanism for the power supply is not limited to this, and it can adopt a common motor or cylinder mechanism as a driving source. Unlike the above-mentioned incision forming moving mechanism, if the power supply cutting blade used for the moving mechanism reliably contacts the outermost conductor of the coated wire, it is acceptable even if it is slightly bitten into the internal structure. Therefore, the possibility of adopting a common motor or cylinder mechanism for the power supply moving mechanism is higher than that of the incision forming moving mechanism. However, in the power supply moving mechanism 132, by adopting the servo motor 132a as the driving source as described above, the cutting accuracy of the power supply connection can be further improved.

Claims

1. A device for forming an incision for peeling, comprising: One or more cutting mechanisms, the cutting mechanisms comprising one or more incision forming mechanism parts, each of the one or more cutting mechanisms being associated with one of the one or more incision forming mechanism parts, wherein the one or more incision forming mechanism parts are configured to be arranged around the wire axis of a covered wire, wherein the covered wire comprises a core wire covered by an insulating layer or covered by an insulating layer and one or more conductor layers, wherein one or more conductor layers are stacked on the inner side of the insulating layer, wherein each of the one or more cutting mechanisms is configured to: form one or more incisions in the covered wire starting from the outer peripheral surface of the covered wire to a specified incision depth using a corresponding one of the one or more incision forming mechanism parts; a rotating mechanism configured to rotate one or more of the cut forming mechanism parts around the electric wire axis in a state where one or more of the cut forming mechanism parts have formed one or more of the cuts in the coated electric wire, thereby extending one or more of the cuts in a direction around the electric wire axis so that a peeled area corresponding to the cut depth can be removed; and a power supply connection portion configured to connect a power supply to an outermost conductor in the covered electric wire at a connection position; the connection position being located on a side closer to an end of the covered electric wire than a cutout formation position of the covered electric wire where the one or more cutouts are formed by the one or more cutting mechanisms, the outermost conductor being located at a minimum depth from an outer peripheral surface of the covered electric wire; Wherein, each of the one or more cutting mechanisms comprises: a conductive slit-forming cutting edge movable in a direction intersecting the outer peripheral surface; a contact detection portion configured to detect contact between the outermost conductor and the notch forming cutting edge based on a current flowing through a circuit including the power supply connection portion, the outermost conductor, and the notch forming cutting edge; and A cut forming moving mechanism is constructed to move the cut forming cutting blade in the cross direction, wherein when the contact is detected by the contact detection unit during the movement of the cut forming cutting blade, the cut forming moving mechanism is constructed to adjust the position of the cut forming cutting blade in the cross direction and position the cut forming cutting blade to a position corresponding to the cut depth to form more than one cut therein.

2. The device according to claim 1, in, The cut-out forming movement mechanism includes a servo motor, and Wherein, the incision forming movement mechanism is configured to move the incision forming cutting blade by means of the servo motor.

3. The device according to claim 1, in, The power supply connection portion includes the power supply and a power supply mechanism portion configured to connect the power supply to the outermost conductor, Wherein, the power supply mechanism unit comprises: an electrically conductive power cutting blade electrically connected to the power source and movable in the cross direction; and A power supply moving mechanism is configured to move the power supply cutting edge in the intersecting direction so that the power supply cutting edge cuts into the outer peripheral surface and thereby comes into contact with the outermost conductor.

4. The device according to claim 3, in, The power moving mechanism includes a servo motor, and Wherein, the power source moving mechanism is configured to move the power source cutting blade via the servo motor.

5. A method for forming an incision for peeling, comprising: a preparation step of placing the covered electric wire in the apparatus according to any one of claims 1 to 4 and positioning the incision forming cutting edge at an initial position by the apparatus, wherein the initial position is spaced apart from the outer peripheral surface in the intersecting direction; a power supply connecting step of connecting the power supply to the outermost conductor on the side of the covered electric wire closer to its end through the power supply connecting portion; a first incision forming step of moving the incision forming cutting edge until contact between the incision forming cutting edge and the outermost conductor is detected based on the current; a second incision forming step of adjusting the position of the incision forming cutting edge in the intersecting direction and positioning the incision forming cutting edge at a position corresponding to the incision depth to form one or more incisions therein when the contact is detected by the contact detecting portion during the movement of the incision forming cutting edge according to the first incision forming step; and A rotation step, in which one or more of the cut forming mechanism parts have formed one or more of the cuts in the coated electric wire, rotate one or more of the cut forming mechanism parts around the electric wire axis, thereby extending one or more of the cuts in a direction around the electric wire axis, so that the peeled area can be removed.

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