Insulated wire middle stripping device

Abstract

To provide a coated-wire intermediate stripping device in which a cut depth of a strip blade member into a coated wire can be controlled with high precision.SOLUTION: A coated-wire intermediate stripping device 1 includes a front strip blade 47a and a rear strip blade 47b. The front strip blade 47a and the rear strip blade 47b can move in a front-rear direction so as to approach or separate from each other along the front-rear direction. When approaching each other, the strip blades cut a coating body 113 of a coated wire 110, and divide the coating body 113 into pieces in a left-right direction. Rotation of a front-side blade motor 48a is controlled to adjust a cut depth of the front strip blade 47a into the coating body 113. Rotation of a rear-side blade motor 48b is controlled to adjust a cut depth of the rear strip blade 47b into the coating body 113.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a coating wire intermediate stripping device for performing an intermediate stripping process on a coated wire.

Background Art

[0002] Conventionally, a coating wire intermediate stripping device for performing an intermediate stripping process on a coated wire in which a core wire is coated with a cylindrical coating has been known (see, for example, Patent Document 1 below). The intermediate stripping process refers to a processing treatment in which the coating on the intermediate portion in the length direction of the coated wire is peeled off over a predetermined range. In such a coating wire intermediate stripping device that performs the intermediate stripping process, in the coated wire to be processed, a pair of blade members (referred to as "strip blade members") for making a cut for separating the coating of the portion to be peeled off and the coating of the portion that remains without being peeled off are provided.

[0003] The pair of strip blade members are arranged to face each other across a coated wire held in a linearly extended state, for example, and are movable so as to approach and separate from each other. By approaching each other, they are configured to cut into the held coated wire from the outside in the radial direction. In a conventional coating wire intermediate stripping device, the pair of strip blade members are caused to approach and separate from each other by the operation of an air cylinder. In a coating wire intermediate stripping device configured to move the pair of strip blade members by the operation of an air cylinder, the pair of strip blade members that have cut into the coated wire come into contact with each other or with a stopper member provided in advance, so that the movement of the pair of strip blade members stops. Therefore, the amount of cutting into the coated wire by the pair of strip blade members is determined by the shape of the blades of the pair of strip blade members and the installation position of the stopper member.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

[0005] In recent years, insulated wires using aluminum core wires instead of copper core wires have become more common. Aluminum has lower tensile strength than copper. Therefore, when performing intermediate stripping on insulated wires with aluminum core wires, it is essential to take the utmost care to avoid damaging the core wire. If the amount the stripping blade cuts into the insulated wire is too large, the core wire will be damaged by the stripping blade. On the other hand, if the amount the stripping blade cuts into the insulated wire is too small, the insulation will not be sufficiently separated, making it difficult to strip the insulation. Therefore, in order to ensure that the stripping blade cuts into the insulated wire without excessive or insufficient cutting, there is a demand for high-precision adjustment of the amount the stripping blade cuts into the insulated wire.

[0006] However, in a wire stripping device that uses an air cylinder to cut a pair of stripping blade members into the insulated wire, it is necessary to adjust the amount of cutting the stripping blade members into the insulated wire by changing the shape of the blades of the stripping blade members or by changing the installation position of the stopper member. Therefore, there is a challenge in that it is difficult to adjust the amount of cutting the stripping blade members into the insulated wire with high precision.

[0007] This invention has been made in view of the above problems, and aims to provide a wire stripping device that can adjust the amount of cutting of the stripping blade member into the insulated wire with high precision. [Means for solving the problem]

[0008] To solve the above problems, the present invention provides a wire holder (for example, left clamp 14L and right clamp 14R in the embodiment) that holds a covered wire, which is composed of a core wire and a cylindrical covering that covers the outer circumference of the core wire, in a linearly extended state, and an intermediate stripping process that strips the covering over a predetermined range in the intermediate portion of the covered wire held by the wire holder, wherein the intermediate stripping device for a covered wire has stripping blade members (for example, front strip blade 47a and rear strip blade 47b in the embodiment) that face each other with the covered wire in between, and the pair of strip blade members are movable in the front-rear direction so as to approach and separate from each other along the front-rear direction, and The device comprises: a strip blade configured to cut into the insulation of the insulated wire to be held by approaching it, thereby dividing the insulation in the left-right direction; a first strip blade position control motor (for example, a front blade motor 48a in the embodiment) that operates to move one of the pair of strip blade members in the front-rear direction; a second strip blade position control motor (for example, a rear blade motor 48b in the embodiment) that operates to move the other of the pair of strip blade members in the front-rear direction; and a blade positioning adjustment unit (for example, a servo motor control unit 61 in the embodiment) that controls the rotation of the first strip blade position control motor and the second strip blade position control motor to adjust the amount of cutting into the insulation of the insulated wire to be held by the pair of strip blade members.

[0009] In the insulated wire intermediate stripping device according to the present invention, preferably, the strip blade is configured such that the pair of strip blade members are facing each other and can move in the left-right direction, and has a third strip blade position control motor (for example, a stripping unit motor 49 in the embodiment) that operates to move the strip blade in the left-right direction, and the blade positioning adjustment unit is configured to adjust the cutting position of the pair of strip blade members into the insulation of the insulated wire to be held by controlling the rotation of the third strip blade position control motor.

[0010] Furthermore, in the insulated wire intermediate stripping device according to the present invention, preferably, it has a pair of slit blade members (for example, a front slit blade 44a and a rear slit blade 44b in the embodiment) that face each other with the insulated wire to be held in between, wherein the pair of slit blade members are configured to move toward and toward each other in the front-rear direction, and are configured to cut into the insulation of the insulated wire to be held by moving toward each other, thereby forming a dividing slit in the insulation that divides the insulation in the circumferential direction, and one of the pair of slit blade members moves toward the front-rear direction The blade positioning adjustment unit comprises a first slit blade position control motor that operates to move the blade (for example, a front blade motor 48a in the embodiment) and a second slit blade position control motor that operates to move the other of the pair of slit blade members in the front-rear direction (for example, a rear blade motor 48b in the embodiment), and the blade positioning adjustment unit is configured to adjust the amount of cutting into the insulation of the insulated wire held by the pair of slit blade members by controlling the rotation of the first slit blade position control motor and the rotation of the second slit blade position control motor.

[0011] Furthermore, in the insulated wire intermediate stripping device according to the present invention, preferably, the slit blade is configured such that the pair of slit blade members are facing each other and can move in the left-right direction, and has a third slit blade position control motor (for example, a stripping unit motor 49 in the embodiment) that operates to move the slit blade in the left-right direction, and the blade position adjustment unit controls the rotation of the third slit blade position control motor to adjust the cutting position of the pair of slit blade members into the insulation of the insulated wire to be held. It is configured to be organized.

[0012] Furthermore, in the insulated wire intermediate stripping device according to the present invention, preferably, the slit blade is configured such that the pair of slit blade members move in the left-right direction while cutting into the insulation of the insulated wire to be held, thereby forming the dividing slit of a predetermined length extending in the left-right direction in the insulation, and the blade positioning adjustment unit is configured to adjust the length of the dividing slit formed in the insulation of the insulated wire by the pair of slit blade members by controlling the rotation of the third slit blade position control motor. [Effects of the Invention]

[0013] The wire stripping device according to the present invention is configured to adjust the amount of cutting into the insulation of the wire to be held by the pair of stripping blade members by controlling the rotation of the position control motor for the first stripping blade and the position control motor for the second stripping blade, so that the amount of cutting into the insulation of the wire to be held by the pair of stripping blade members can be adjusted with high precision.

[0014] Furthermore, according to the insulated wire intermediate stripping device of the present invention, by controlling the rotation of the third strip blade position control motor to adjust the cutting position of the pair of strip blade members into the insulation of the insulated wire to be held, it becomes possible to adjust the cutting position of the pair of strip blade members into the insulation with high precision.

[0015] Furthermore, according to the insulated wire intermediate stripping device of the present invention, by controlling the rotation of the first slit blade position control motor and the second slit blade position control motor to adjust the amount of cutting into the insulation of the insulated wire held by the pair of slit blade members, it becomes possible to adjust the amount of cutting into the insulation of the pair of slit blade members with high precision.

[0016] Furthermore, according to the insulated wire intermediate stripping device of the present invention, by controlling the rotation of the third slit blade position control motor to adjust the cutting position of the pair of slit blade members into the insulation of the insulated wire to be held, it becomes possible to adjust the cutting position of the pair of slit blade members into the insulation with high precision.

[0017] Furthermore, according to the insulated wire intermediate stripping device of the present invention, by controlling the rotation of the third slit blade position control motor, the length of the dividing slits formed in the insulation of the insulated wire held by the pair of slit blade members can be adjusted with high precision. [Brief explanation of the drawing]

[0018] [Figure 1] This is a perspective view of an insulated wire intermediate stripping device according to one embodiment of the present invention. [Figure 2] This is a plan view of the insulated wire intermediate stripping device shown above. [Figure 3] This diagram shows the roles of each motor and air cylinder in the above-mentioned insulated wire intermediate stripping device. [Figure 4] This figure shows the strip blade of the insulated wire intermediate stripping device described above. [Figure 5] This diagram shows the position of the blade when the strip blade cuts into the wire insulation. [Figure 6] This diagram shows the position of the blade when the strip blade is stripping the insulation from the wire. [Figure 7] This diagram shows the position of the slit blade when it cuts into the insulation of the insulated wire intermediate stripping device described above. [Figure 8] It is a block diagram showing a servo motor control system of the above-mentioned intermediate wire stripping device for coated wires. [Figure 9] It is a diagram showing Step 1 of the intermediate wire stripping process by the above-mentioned intermediate wire stripping device for coated wires. [Figure 10] It is a diagram showing Step 2 of the above-mentioned intermediate wire stripping process. [Figure 11] It is a diagram showing Step 3 of the above-mentioned intermediate wire stripping process. [Figure 12] It is a diagram showing Step 4 of the above-mentioned intermediate wire stripping process. [Figure 13] It is a diagram showing Step 5 of the above-mentioned intermediate wire stripping process. [Figure 14] It is a diagram showing Step 6 of the above-mentioned intermediate wire stripping process. [Figure 15] It is a diagram showing Step 7 of the above-mentioned intermediate wire stripping process. [Figure 16] It is a diagram showing Step 8 of the above-mentioned intermediate wire stripping process. [Figure 17] It is a diagram showing Step 9 of the above-mentioned intermediate wire stripping process. [Figure 18] It is a diagram showing Step 10 of the above-mentioned intermediate wire stripping process. [Figure 19] It is a diagram showing Step 11 of the above-mentioned intermediate wire stripping process. [Figure 20] It is a diagram showing Step 12 of the above-mentioned intermediate wire stripping process. [Figure 21] It is a diagram showing Step 13 of the above-mentioned intermediate wire stripping process. [Figure 22] It is a diagram showing Step 14 of the above-mentioned intermediate wire stripping process. [Figure 23] It is a diagram showing Step 15 of the above-mentioned intermediate wire stripping process. [Figure 24] It is a diagram showing Step 16 of the above-mentioned intermediate wire stripping process. [Figure 25] It is a diagram showing Step 17 of the above-mentioned intermediate wire stripping process. [Figure 26] It is a diagram showing Step 18 of the above-mentioned intermediate wire stripping process. [Figure 27] It is a diagram showing Step 19 of the above-mentioned intermediate wire stripping process. [Figure 28] This figure shows the relationship between the cut position in the insulated wire made by the strip blade and the length of the dividing slit formed in the insulated wire by the slit blade. [Figure 29] This is an explanatory diagram regarding the curling of the coating's end surface. [Figure 30] This figure shows the modified procedure (a) for the intermediate debarking process described above. [Figure 31] This figure shows the modified procedure b for the intermediate debarking process described above. [Figure 32] This figure shows the modified procedure c for the intermediate debarking process described above. [Figure 33] This figure shows the modified procedure d for the intermediate debarking process described above. [Modes for carrying out the invention]

[0019] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. Figures 1 and 2 show a wire stripping device 1 according to one embodiment of the present invention. First, the overall configuration of this wire stripping device 1 will be outlined with reference to Figures 1 to 7. Figures 1 and 2 show arrows indicating the front, back, left, right, up, and down directions, and when directions are mentioned in the following description, the direction of these arrows will be followed.

[0020] As shown in Figures 1 and 2, the insulated wire intermediate stripping device 1 mainly consists of a left support plate 3L and a right support plate 3R that support the entire device, a left clamp unit 5L and a right clamp unit 5R that hold the insulated wire 110, and a stripping unit 7 that performs intermediate stripping on the insulated wire 110. Intermediate stripping refers to a processing treatment in which the coating 113 (see Figure 4) in the intermediate portion (middle portion) of the insulated wire 110 over a predetermined range. As shown in Figure 4 (Figure 4 shows a radial cross-section of the insulated wire 110), the insulated wire 110 consists of a core wire 111 made of one or more conductive copper or aluminum strands, and an insulating coating 113 that covers the outer circumference of this core wire 111.

[0021] The left support plate 3L and the right support plate 3R are formed in a plate shape that extends forward, backward, and up and down, respectively, and are configured to be bolted to a frame or the like (not shown). The left clamp unit 5L consists of a left clamp stage 11L provided on top of the left support plate 3L, and a left front clamp assembly 12La and a left rear clamp assembly provided on top of the left clamp stage 11L. The system includes a clamp assembly 12Lb, a left clamp air cylinder 15L attached to the front (or rear) of the left clamp stage 11L, and a tension air cylinder 16 attached to the left side of the left support plate 3L. The left clamp stage 11L, located on the upper part of the left support plate 3L, is configured to be movable in the left-right direction relative to the left support plate 3L.

[0022] As shown in Figure 2, the left front clamp assembly 12La includes a left front clamp holder 13La and a left front clamping device 14La attached to the left front clamp holder 13La, and is configured to be movable in the front-rear direction relative to the left clamp stage 11L. The left rear clamp assembly 12Lb includes a left rear clamp holder 13Lb and a left rear clamping device 14Lb attached to the left rear clamp holder 13Lb, and is configured to be movable in the front-rear direction relative to the left clamp stage 11L. The left front clamping device 14La and the left rear clamping device 14Lb constitute the left clamp 14L (see Figure 3).

[0023] The left clamp air cylinder 15L has a piston rod (not shown) that operates in the front-rear direction by compressed air supplied from an air compressor (not shown), and the left front clamp assembly 12La and the left rear clamp assembly 12Lb are connected to this piston rod via a connecting mechanism (not shown). When the left clamp air cylinder 15L operates, the left front clamp assembly 12La and the left rear clamp assembly 12Lb move in opposite directions relative to the left clamp stage 11L in the front-rear direction, thereby allowing the left front clamp 14La and the left rear clamp 14Lb to come into contact with or separate from each other. Hereinafter, when the left front clamp 14La and the left rear clamp 14Lb come into contact with each other, this will be referred to as the left clamp 14L closing, and when the left front clamp 14La and the left rear clamp 14Lb separate from each other, this will be referred to as the left clamp 14L opening. The left clamp 14L, when closed, allows multiple insulated wires 110 to be gripped while aligned vertically.

[0024] The tension air cylinder 16 has a piston rod (not shown) that operates in the left-right direction by compressed air supplied from an air compressor, and the left clamp stage 11L is connected to this piston rod via a connecting mechanism (not shown). When the tension air cylinder 16 is operated, the left clamp stage 11L can move in the left-right direction relative to the left support plate 3L. In particular, when the insulated wire 110 is held by the left clamp unit 5L (left clamp 14L) and the right clamp unit 5R (right clamp 14R described later), the tension air cylinder 16 is operated and the left clamp stage 11L is moved to the left relative to the left support plate 3L, thereby applying tension to the insulated wire 110, and thus the insulated wire 110 can be held in a state that is linearly extended (tensioned) in the left-right direction.

[0025] The right clamp unit 5R includes a right clamp stage 11R fixed to the upper part of the right support plate 3R, a right front clamp assembly 12Ra and a right rear clamp assembly 12Rb provided on the upper part of the right clamp stage 11R, and a right clamp air cylinder 15R attached to the rear (or front) part of the right clamp stage 11R.

[0026] As shown in Figure 2, the right front clamp assembly 12Ra includes a right front clamp holder 13Ra and a right front clamping tool 14Ra attached to the right front clamp holder 13Ra, and is configured to be movable in the front-rear direction relative to the right clamp stage 11R. The right rear clamp assembly 12Rb includes a right rear clamp holder 13Rb and a right rear clamping tool 14Rb attached to the right rear clamp holder 13Rb, and is configured to be movable in the front-rear direction relative to the right clamp stage 11R. The right front clamping tool 14Ra and the right rear clamping tool 14Rb constitute the right clamp 14R (see Figure 3).

[0027] The right clamp air cylinder 15R has a piston rod (not shown) that operates in the front-rear direction by compressed air supplied from an air compressor, and the right front clamp assembly 12Ra and the right rear clamp assembly 12Rb are connected to this piston rod via a connecting mechanism (not shown). When the right clamp air cylinder 15R is operated, the right front clamp assembly 12Ra and the right rear clamp assembly 12Rb move in opposite directions relative to the right clamp stage 11R in the front-rear direction, thereby allowing the right front clamp 14Ra and the right rear clamp 14Rb to come into contact with or separate from each other. Hereinafter, when the right front clamp 14Ra and the right rear clamp 14Rb come into contact with each other, this will be referred to as the right clamp 14R closing, and when the right front clamp 14Ra and the right rear clamp 14Rb separate from each other, this will be referred to as the right clamp 14R opening. When the right clamp 14R is closed, it is possible to grip multiple insulated wires 110 in an aligned state in the vertical direction.

[0028] The stripping unit 7 includes a stripping unit guide frame 30 that is elongated in the left-right direction, a stripping unit stage 41 fixed to the stripping unit guide frame 30, a front slit blade assembly 42a and a front strip blade assembly 45a provided on the front upper part of the stripping unit stage 41, a rear slit blade assembly 42b and a rear strip blade assembly 45b provided on the rear upper part of the stripping unit stage 41, a front blade motor 48a attached to the front lower part of the stripping unit stage 41, a rear blade motor 48b attached to the rear lower part of the stripping unit stage 41, and a stripping unit motor 49 provided at the left end of the insulated wire intermediate stripping device 1.

[0029] As shown in Figure 2, the peeling unit guide frame 30 is configured to have a pair of left and right end bars 31L and right end bars 31R extending in the front-rear direction at both the left and right ends of the frame 30, and a pair of front and rear guide bars 32a and rear guide bars 32b extending in the left-right direction and connecting the left end bar 31L and the right end bar 31R. The front guide bars 32a and rear guide bars 32b are slidably inserted into through holes (not shown) formed in the left support plate 3L and the right support plate 3R, respectively, while being fixed to the peeling unit stage 41. As a result, the peeling unit guide frame 30 is configured to be movable in the left-right direction relative to the left support plate 3L and the right support plate 3R, integrally with the peeling unit stage 41.

[0030] As shown in Figure 2, the front slit blade assembly 42a has a front slit blade holder 43a and a front slit blade 44a attached to the front slit blade holder 43a, and is configured to be movable in the front-rear direction relative to the peeling unit stage 41. The front strip blade assembly 45a has a front strip blade holder 46a and a front strip blade 47a attached to the front strip blade holder 46a, and is configured to be movable in the front-rear direction relative to the peeling unit stage 41.

[0031] As shown in Figure 2, the rear slit blade assembly 42b has a rear slit blade holder 43b and a rear slit blade 44b attached to the rear slit blade holder 43b, and is configured to be movable in the front-rear direction relative to the peeling unit stage 41. The rear strip blade assembly 45b has a rear strip blade holder 46b and a rear strip blade 47b attached to the rear strip blade holder 46b, and is configured to be movable in the front-rear direction relative to the peeling unit stage 41.

[0032] The motor 48a for the front blade is composed of a servo motor (for example, an AC servo motor, but a DC servo motor is also acceptable), and the front slit blade assembly 42a and the front strip blade assembly 45a are connected to its motor shaft (not shown) via a connecting mechanism (not shown). They are connected in this manner. The motor 48a for the front blade is configured to move the front slit blade assembly 42a and the front strip blade assembly 45a in opposite directions relative to the peeling unit stage 41 in the front-rear direction when the motor 48a for the front blade is activated.

[0033] The rear blade motor 48b is configured as a servo motor (for example, an AC servo motor, but a DC servo motor is also acceptable), and the rear slit blade assembly 42b and the rear strip blade assembly 45b are connected to its motor shaft (not shown) via a coupling mechanism (not shown). When the rear blade motor 48b is operated, the rear slit blade assembly 42b and the rear strip blade assembly 45b are configured to move in opposite directions relative to the peeling unit stage 41 in the front-rear direction.

[0034] The front blade motor 48a and the rear blade motor 48b operate simultaneously, allowing the front slit blade 44a and the rear slit blade 44b to move closer to and further apart from each other. As shown in Figure 3, the front slit blade 44a and the rear slit blade 44b are positioned so that their respective cutting edges 441 face each other, and as they move closer to each other, their respective cutting edges 441 cut into the insulation 113 of the insulated wire 110 (see Figure 7). The front slit blade 44a and the rear slit blade 44b constitute the slit blade 44 (see Figure 3). Hereinafter, when the front slit blade 44a and the rear slit blade 44b move closer to each other, this will be referred to as the slit blade 44 closing, and when the front slit blade 44a and the rear slit blade 44b move further apart from each other, this will be referred to as the slit blade 44 opening. Although not shown, the slit blade 44 (the pair of front slit blade 44a and rear slit blade 44b) are held vertically in place by the left clamp 14L and the right clamp 14R. Multiple units are installed in a vertical arrangement to accommodate each of the multiple insulated electric wires 110 that are held in an aligned state.

[0035] Furthermore, the front blade motor 48a and the rear blade motor 48b operate simultaneously, allowing the front strip blade 47a and the rear strip blade 47b to move closer to or further apart from each other. As shown in Figure 4, the front strip blade 47a and the rear strip blade 47b are arranged so that their respective curved blades 471 face each other, and as they move closer to each other, their respective curved blades 471 cut into the insulation 113 of the insulated wire 110 (see Figures 5 and 6). The front strip blade 47a and the rear strip blade 47b constitute the strip blade 47 (see Figure 3). Hereinafter, when the front strip blade 47a and the rear strip blade 47b move closer to each other, this will be referred to as the strip blade 47 closing, and when the front strip blade 47a and the rear strip blade 47b move further apart from each other, this will be referred to as the strip blade 47 opening. Although not shown in the diagram, the curved blades 471 of the strip blade 47 are arranged in a vertical direction in multiple rows so as to be able to accommodate multiple insulated wires 110 that are held in an aligned vertical position by the left clamp 14L and the right clamp 14R.

[0036] The peeling unit motor 49 is composed of a servo motor (for example, an AC servo motor, but a DC servo motor is also acceptable) and is attached to the left support plate 3L via a motor support base 50. As shown in Figure 2, the motor support base 50 consists of a support plate 51 to which the peeling unit motor 49 is fixed, and a plurality of connecting bars 52 that connect the support plate 51 and the left support plate 3L. The peeling unit stage 41 is connected to the motor shaft (not shown) of the peeling unit motor 49 via a connecting mechanism (not shown). When the peeling unit motor 49 is operated, the peeling unit stage 41 moves in the left-right direction, thereby moving the slit blade 44 (front slit blade 44a and rear slit blade 44b) and the strip blade 47 (front strip blade 47a and rear The strip blade 47b) is configured to move in the left-right direction (the longitudinal direction of the insulated wire 110) relative to the insulated wire 110 held by the left clamp 14L and the right clamp 14R.

[0037] In this insulated wire intermediate stripping device 1, the left clamp 14L opens and closes when the left clamp air cylinder 15L is operated, and the right clamp 14R opens and closes when the right clamp air cylinder 15R is operated. In addition, the left clamp stage 11L moves left and right when the tension air cylinder 16 is operated. In contrast, the slit blade 44 and strip blade 47 are configured to open and close when the front blade motor 48a and rear blade motor 48b are operated, respectively, and to move left and right when the stripping unit motor 49 is operated. As a result, the cutting position of the cutting edge 441 of the slit blade 44 (front slit blade 44a and rear slit blade 44b) into the insulated wire 110 (insulation 113), the amount of cutting in the radial direction of the insulated wire 110, and the length of the divided slit 115 (see Figure 14, details described later) formed in the insulation 113 of the insulated wire 110 by the cutting edge 441 of the slit blade 44 can be adjusted with high precision. Furthermore, the amount of radial cutting into the insulated wire 110 by the curved blades 471 of the strip blades 47 (front strip blade 47a and rear strip blade 47b), and the cutting position of the insulated wire 110 by the curved blades 471 of the strip blades 47 can be adjusted with high precision.

[0038] Here, with additional reference to Figure 8, the control system (servo motor control system 60) for each servo motor (front blade motor 48a, rear blade motor 48b, and stripping unit motor 49) in the insulated wire intermediate stripping device 1 will be described. This servo motor control system 60 is composed of a servo motor control unit 61 and a servo motor operation input unit 62. The servo motor control unit 61 includes a command unit 63 and a motor rotation control unit 64, and the motor rotation control unit 64 further includes a front blade motor rotation control unit 64a, a rear blade motor rotation control unit 64b, and a stripping unit motor rotation control unit 64c. The front blade motor rotation control unit 64a controls the rotation speed and rotation position of the front blade motor 48a, and outputs a control signal to the front blade motor 48a while receiving and referring to a detection signal from the encoder (not shown) of the front blade motor 48a. The rear blade motor rotation control unit 64b controls the rotation speed and rotation position of the rear blade motor 48b, and outputs a control signal to the rear blade motor 48b while referring to a detection signal from the encoder (not shown) of the rear blade motor 48b.

[0039] The motor rotation control unit 64c controls the rotation speed and rotation position of the motor 49 for the dederming unit. It receives and references a detection signal from the encoder (not shown) of the motor 49 for the dederming unit and outputs a control signal to the motor 49 for the dederming unit. The command unit 63 gives commands to the motor rotation control units 64 (motor rotation control unit 64a for the front blade, motor rotation control unit 64b for the rear blade, and motor rotation control unit 64c for the dederming unit) regarding the rotation speed and rotation position of the motors. It outputs command signals to the motor rotation control units 64 while referencing feedback signals from the motor rotation control units 64. The servo motor operation input unit 62 is operated by the operator to determine or change the rotation speed and rotation position of each servo motor (motor 48a for the front blade, motor 48b for the rear blade, and motor 49 for the dederming unit). For example, it is configured as a touch panel that can be operated using a stylus or finger. When the servo motor operation input unit 62 is operated and specified values ​​related to the rotation speed and rotation position of the servo motor are input, a specified signal indicating those specified values ​​is output to the servo motor control unit 61, and the servo motor control unit 61 controls the servo motor based on those specified values.

[0040] Next, the intermediate stripping of the insulated wire 110 is performed by the insulated wire intermediate stripping device 1. The procedure for the stripping process will be explained with additional reference to Figures 9 to 33. In the following explanation, it will be assumed that there is one insulated wire 110 undergoing the intermediate stripping process. In the intermediate stripping process, first, as shown in Step 1 of Figure 9, the left clamp 14L and the right clamp 14R are opened, and the insulated wire 110 is set between the left front clamp 14La and the left rear clamp 14Lb, and between the right front clamp 14Ra and the right rear clamp 14Rb. Next, as shown in Step 2 of Figure 10, the left clamp 14L and the right clamp 14R are closed to grip the insulated wire 110. Furthermore, as shown in Step 3 of Figure 11, while gripping the insulated wire 110, the left clamp 14L is moved slightly to the left, applying tension to the insulated wire 110. As a result, the insulated wire 110 is held by the left clamp 14L and the right clamp 14R in a state where it extends linearly in the left-right direction.

[0041] Next, as shown in Step 4 of Figure 12, the slit blades 44 are closed, and the insulated wire 110 is held between the front slit blade 44a and the rear slit blade 44b. The front slit blade 44a (in detail, its cutting edge 441 (see Figure 7)) is used to cut into the insulation 113 of the insulated wire 110 from the front, and the rear slit blade 44b (in detail, its cutting edge 441 (see Figure 7)) is used to cut into the insulation 113 of the insulated wire 110 from the rear. At this time, the amount of cut into the insulation 113 of the insulated wire 110 by the cutting edge 441 of the front slit blade 44a is set to be approximately equal to or slightly greater than the radial thickness of the insulation 113, as shown in Figure 7, but with a small gap between the cutting edge 441 and the core wire 111. In other words, when cutting, the cutting edge 441 of the front slit blade 44a is set to sufficiently cut through the insulation 113, while stopping at a position where the cutting edge 441 of the front slit blade 44a does not cut into the core wire 111. Similarly, the amount of cutting into the insulation 113 by the cutting edge 441 of the rear slit blade 44b is set to be approximately the same as or slightly greater than the radial thickness of the insulation 113, while leaving a small gap between the cutting edge 441 and the core wire 111. In other words, when cutting, the cutting edge 441 of the rear slit blade 44b is set to sufficiently cut through the insulation 113, while stopping at a position where the cutting edge 441 of the rear slit blade 44b does not cut into the core wire 111.

[0042] In the insulated wire intermediate stripping device 1, the amount of cutting into the insulated material 113 by the cutting edge 441 of the front slit blade 44a is adjusted by controlling the rotation (rotation position) of the motor 48a for the front blade, and the amount of cutting into the insulated material 113 by the cutting edge 441 of the rear slit blade 44b is adjusted by controlling the rotation (rotation position) of the motor 48b for the rear blade. Therefore, these cutting amounts can be adjusted with high precision, thereby ensuring that the cutting edges 441 of the front slit blade 44a and the rear slit blade 44b cut into the insulated material 113 without excessive or insufficient cutting. Note that even with insulated wires of the same type and size specifications manufactured by the same manufacturer, variations in the outer dimensions of the core wire and the outer dimensions of the insulated material (also referred to as "product variations") may occur due to differences in manufacturing lots or manufacturing locations. Therefore, when performing intermediate stripping on insulated wires 110 with such product variations, it is necessary to readjust the amount of cutting into the insulation 113 by the cutting edge 441 of the front slit blade 44a and the cutting edge 441 of the rear slit blade 44b. In the insulated wire intermediate stripping device 1, such readjustment of the cutting amount can be easily done by the operator operating the servo motor operation input unit 62 to re-enter the specified values ​​for these cutting amounts. In addition, in the insulated wire intermediate stripping device 1, the cutting positions (left-right positions relative to the insulated wire 110) of the cutting edges 441 of the front slit blade 44a and the rear slit blade 44b are adjusted by controlling the rotation (rotation position) of the stripping unit motor 49. Therefore, these cutting positions can be adjusted with high precision. Furthermore, when changing these cutting positions, it can be easily done by the operator operating the servo motor operation input unit 62 to re-enter the specified values ​​for these cutting positions.

[0043] Next, as shown in Step 5 of Figure 13, with the front slit blade 44a and the rear slit blade 44b still in the state where they have cut into the insulation 113 of the insulated wire 110, the front slit blade 44a and the rear slit blade 44b are moved a predetermined distance to the left and right, thereby forming a dividing slit 115 of a predetermined length that extends in the left and right direction and divides the insulation 113 in the circumferential direction. Note that the dividing slit 115 is formed at the front and rear of the insulated wire 110 (insulation 113), but for convenience, in Figures 13 and later, the dividing slit 115 is shown as if it were formed at the upper and lower parts of the insulated wire 110 (insulation 113). When moving the front slit blade 44a and the rear slit blade 44b to the right, before doing so, the front slit blade 44a and the rear slit blade 44b are slightly separated from each other from their initial position when they were cut into the insulated wire 110. This reduces the possibility that the core wire 111 of the insulated wire 110 may be damaged by the front slit blade 44a and the rear slit blade 44b when forming the dividing slit 115.

[0044] Next, as shown in Step 6 of Figure 14, the slit blades 44 are opened (the front slit blade 44a and the rear slit blade 44b are separated from each other), and the cutting edges 441 of the front slit blade 44a and the rear slit blade 44b are separated from the insulation 113 of the insulated wire 110. In the insulated wire intermediate stripping device 1, the length (total length in the left-right direction) of the dividing slit 115 formed in the insulation 113 by the front slit blade 44a and the rear slit blade 44b is adjusted by controlling the rotation (rotation position) of the stripping unit motor 49. Therefore, the length of the dividing slit 115 can be adjusted with high precision. Furthermore, if the length of the dividing slit 115 needs to be changed, the operator can easily do so by operating the servo motor operation input unit 62 and re-entering the specified value for the length of the dividing slit 115.

[0045] Next, as shown in Step 7 of Figure 15, the strip blades 47 (front strip blade 47a and rear strip blade 47b) are moved to the left and stopped at a position in the left-right direction corresponding to the right end of the dividing slit 115 (also referred to as the "first position"). Then, as shown in Step 8 of Figure 16, the strip blades 47 are closed at the first position, and while the insulated wire 110 is clamped from the front and rear by the front strip blade 47a and the rear strip blade 47b, the front strip blade 47a (in detail, its curved blade 471 (see Figure 5)) is made to cut into the insulation 113 of the insulated wire 110 from the front, and the rear strip blade 47b (in detail, its curved blade 471 (see Figure 5)) is made to cut into the insulation 113 of the insulated wire 110 from the rear. At this time, the amount of cut made into the insulation 113 of the insulated wire 110 by the curved blade 471 of the front strip blade 47a is set to be approximately equal to or slightly greater than the radial thickness of the insulation 113, as shown in Figure 5, but with a small gap between the curved blade 471 and the core wire 111. In other words, when cutting, the curved blade 471 of the front strip blade 47a is set to stop at a position where it sufficiently cuts through the insulation 113 without cutting into the core wire 111. Similarly, the amount of cut made into the insulation 113 by the curved blade 471 of the rear strip blade 47b is also set to be approximately equal to or slightly greater than the radial thickness of the insulation 113, but with a small gap between the curved blade 471 and the core wire 111. In other words, when cutting, the curved blade 471 of the rear strip blade 47b is set to stop at a position where it sufficiently cuts through the insulation 113 without cutting into the core wire 111.

[0046] Next, as shown in Step 9 of Figure 17, with the front strip blade 47a and the rear strip blade 47b still cut into the insulation 113 of the insulated wire 110, move the front strip blade 47a and the rear strip blade 47b in the left-right direction (to the left) to press the insulation (also referred to as "intermediate insulation 113a") corresponding to the portion where the dividing slit 115 was formed to the left. Then, as shown in Step 10 of Figure 18, continue moving the front strip blade 47a and the rear strip blade 47b to the left for a predetermined distance, bending the intermediate insulation 113a and peeling it off from the core wire 111 of the insulated wire 110. When moving the trip blade 47a and the rear strip blade 47b to the left, before doing so, the front strip blade 47a and the rear strip blade 47b should be slightly separated from each other than their initial position when they cut into the insulated wire 110 (see Figure 5) (see Figure 6). This reduces the possibility of the core wire 111 being damaged by the front strip blade 47a and the rear strip blade 47b when moving the front strip blade 47a and the rear strip blade 47b to the left to strip the intermediate insulation 113a.

[0047] Next, as shown in Step 11 of Figure 19, the strip blade 47 is opened, and the front strip blade 47a and the rear strip blade 47b are pulled away from the insulated wire 110, and the strip blade 47 is moved to the left. Then, as shown in Step 12 of Figure 20, the strip blade 47 is stopped at a position in the left-right direction corresponding to the left end of the dividing slit 115 (also referred to as the "second position"). Next, as shown in Step 13 of Figure 21, the strip blade 47 is closed at the second position, and while the insulated wire 110 is clamped from the front and rear by the front strip blade 47a and the rear strip blade 47b, the front strip blade 47a (in detail, its curved blade 471 (see Figure 5)) is made to cut into the insulation 113 of the insulated wire 110 from the front, and the rear strip blade 47b (in detail, its curved blade 471 (see Figure 5)) is made to cut into the insulation 113 of the insulated wire 110 from the rear. At this time, the amount of cut made into the insulation 113 of the insulated wire 110 by the curved blade 471 of the front strip blade 47a is set to be approximately equal to or slightly greater than the radial thickness of the insulation 113, as shown in Figure 5, but with a small gap between the curved blade 471 and the core wire 111. In other words, when cutting, the curved blade 471 of the front strip blade 47a is set to stop at a position where it sufficiently cuts through the insulation 113 without cutting into the core wire 111. Similarly, the amount of cut made into the insulation 113 by the curved blade 471 of the rear strip blade 47b is also set to be approximately equal to or slightly greater than the radial thickness of the insulation 113, but with a small gap between the curved blade 471 and the core wire 111. In other words, when cutting, the curved blade 471 of the rear strip blade 47b is set to stop at a position where it sufficiently cuts through the insulation 113 without cutting into the core wire 111.

[0048] Next, as shown in Step 14 of Figure 22, with the front strip blade 47a and the rear strip blade 47b still cut into the insulation 113 of the insulated wire 110, move the front strip blade 47a and the rear strip blade 47b in the left-right direction (to the right) to press the intermediate insulation 113a to the right. Before moving the front strip blade 47a and the rear strip blade 47b to the right, slightly separate the front strip blade 47a and the rear strip blade 47b from each other (see Figure 6). This reduces the possibility of the core wire 111 being damaged by the front strip blade 47a and the rear strip blade 47b when moving them to the right.

[0049] Next, as shown in Step 15 of Figure 23 and Step 16 of Figure 24, the front strip blade 47a and the rear strip blade 47b are moved to the right while gradually widening the gap between them, and the intermediate insulation 113a is completely peeled off and removed from the core wire 111. Then, as shown in Step 17 of Figure 25, the movement of the front strip blade 47a and the rear strip blade 47b to the right is stopped. Next, as shown in Step 18 of Figure 26, the left clamp 14L and the right clamp 14R are opened to release the insulated wire 110. Furthermore, as shown in Step 19 of Figure 27, the left clamp 14L, which is in the open position, is moved slightly to the right and returned to its original position, thus completing the series of steps for the intermediate stripping process.

[0050] In the insulated wire intermediate stripping device 1, the curved blade 471 of the front stripping blade 47a The amount of cutting into the covering 113 (the amount of cutting at the first and second positions) is adjusted by controlling the rotation (rotation position) of the front blade motor 48a, and the amount of cutting into the covering 113 by the curved blade 471 of the rear strip blade 47b (the amount of cutting at the first and second positions) is adjusted by controlling the rotation (rotation position) of the rear blade motor 48b. Therefore, these cutting amounts can be adjusted with high precision, thereby allowing the curved blades 471 of the front strip blade 47a and the rear strip blade 47b to cut into the covering 113 without excessive or insufficient cutting. However, when performing intermediate stripping on insulated wires 110 with product variations, it is necessary to readjust the amount of cutting into the covering 113 by the curved blade 471 of the front strip blade 47a and the curved blade 471 of the rear strip blade 47b. In the insulated wire intermediate stripping device 1, readjusting the cutting amount can be easily done by the operator operating the servo motor operation input unit 62 to re-enter the specified values ​​for these cutting amounts. Furthermore, in the insulated wire intermediate stripping device 1, the cutting positions (cutting positions corresponding to the first position and cutting positions corresponding to the second position) of the curved blades 471 of the front strip blade 47a and the rear strip blade 47b into the insulated body 113 are adjusted by controlling the rotation (rotation position) of the motor 49 for the stripping unit. Therefore, these cutting positions can be adjusted with high precision.

[0051] In the intermediate deskinning process, in order to facilitate the peeling of the coating 113, the formation position and length of the divided slit 115 and the two cutting positions by the strip blade 47 are set such that the range R1 between the two cutting positions in the coating 113 made by the strip blade 47 (front strip blade 47a and rear strip blade 47b) is included within the formation range R2 (see Figure 28) of the divided slit 115 made by the slit blade 44 (front slit blade 44a and rear slit blade 44b). As a result, both the left and right ends of the divided slit 115 will protrude to the left and right beyond the two cutting positions by the strip blade 47 (this protruding portion is referred to as the "slit cutting over portion 115a"). It is preferable to make the length of this over portion 115a as short as possible. If the slit cutting over portion 115a is too long, there is a risk of the end face of the coating 113 curling up, as shown in Figure 29. In the insulated wire intermediate stripping device 1, the positions of the two cuts made into the insulated body 113 by the strip blades 47 (front strip blade 47a and rear strip blade 47b), as well as the formation position and length of the divided slit 115, can be adjusted with high precision. As a result, the length of the slit cut over portion 115a can be adjusted to an appropriate length, thereby preventing the curling of the insulated end face and improving the product quality of the insulated wire 110 after intermediate stripping.

[0052] The procedure for the intermediate stripping process described above may be partially modified. For example, instead of steps 9 to 16 described above, modified steps a to d shown in Figures 30 to 33 may be performed. In modified step a shown in Figure 30, unlike step 9 in Figure 17, the front strip blade 47a and the rear strip blade 47b are not moved to the left while they are still cut into the insulation 113 of the insulated wire 110. Instead, the strip blades 47 are opened, and the front strip blade 47a and the rear strip blade 47b are pulled away from the insulated wire 110. Then, as shown in modified step b in Figure 31, the strip blades 47 (front strip blade 47a and rear strip blade 47b) are moved to the left and stopped at a second position corresponding to the left end of the dividing slit 115.

[0053] Next, as shown in the "Changing Procedure c" in Figure 32, the strip blades 47 are closed in the second position, and the insulated wire 110 is clamped from the front and rear by the front strip blade 47a and the rear strip blade 47b, while the front strip blade 47a cuts into the insulation 113 of the insulated wire 110 from the front, and the rear strip blade 47b covers from the rear. Cut into the insulation 113 of the electric wire 110. Then, as shown in <modification procedure d> in Figure 33, with the front strip blade 47a and the rear strip blade 47b still cut into the insulation 113 of the insulated electric wire 110, move the front strip blade 47a and the rear strip blade 47b to the left and right (to the right) to peel off and remove the intermediate insulation 113a from the core wire 111. The intermediate insulation 113a can also be peeled off by these <modification procedures a> to <modification procedures d>, but peeling off the intermediate insulation 113a while it is bent by <procedures 9> to <procedure 16> described above has the advantage that the intermediate insulation 113a is easier to peel off.

[0054] Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and can be modified as appropriate without departing from the spirit of the invention.

[0055] For example, in the above embodiment, the servo motor that moves the front slit blade 44a in the front-rear direction and the servo motor that moves the front strip blade 47a in the front-rear direction are both composed of one front blade motor 48a, but these servo motors may be configured separately. Similarly, in the above embodiment, the servo motor that moves the rear slit blade 44b in the front-rear direction and the servo motor that moves the rear strip blade 47b in the front-rear direction are both composed of one rear blade motor 48b, but these servo motors may be configured separately. Stepping motors may be used instead of servo motors. [Explanation of symbols]

[0056] 1. Insulated wire intermediate stripping device 5L Left Clamp Unit 5R Right Clamp Unit 7. Peeling Unit 14L Left Clamp 14R Right Clamp 41 Skinning Unit Stage 44a Front Slit Blade 44b Rear Slit Blade 47a Front strip blade 47b Rear strip blade 48a Motor for front blade 48b Rear blade motor 49 Motor for peeling unit 110 Insulated wire 111 Core wire 113 Covering 113a Intermediate covering 115 divided slits

Claims

1. An intermediate stripping device for an insulated electric wire has a wire holder that holds an insulated electric wire in a linearly extended state, the insulated electric wire being configured to have a core wire and a tubular coating that covers the outer periphery of the core wire, and performs an intermediate stripping process on the insulated electric wire held by the wire holder, stripping the coating from a predetermined range at an intermediate portion in the length direction of the insulated electric wire, When the length direction of the held coated electric wire is defined as the left-right direction and a direction perpendicular to the left-right direction is defined as the front-rear direction, a strip blade having a pair of strip blade members facing each other with the held coated electric wire sandwiched therebetween, the pair of strip blade members being movable in the front-rear direction so as to approach and move away from each other along the front-rear direction, and configured to cut into the coating of the held coated electric wire by approaching each other and to divide the coating in the left-right direction; a first strip blade position control motor that operates to move one of the pair of strip blade members in a forward and backward direction; a second strip blade position control motor that operates to move the other of the pair of strip blade members in a forward and backward direction; a blade positioning adjustment unit that controls the rotation of the first strip blade position control motor and the rotation of the second strip blade position control motor to adjust the amount of cutting into the coating of the held insulated electric wire by the pair of strip blade members.

2. The strip blade is configured so that the pair of strip blade members are movable in the left-right direction while facing each other, a third strip blade position control motor operable to move the strip blade in a left-right direction; 2. The insulated electric wire intermediate stripping device according to claim 1, wherein the blade positioning adjustment unit is configured to control rotation of the third strip blade position control motor to adjust the cutting position of the pair of strip blade members into the coating of the held insulated electric wire.

3. a slit blade having a pair of slit blade members facing each other with the held coated electric wire sandwiched therebetween, the pair of slit blade members being configured to be movable in the front-rear direction so as to approach and move away from each other along the front-rear direction, and configured to cut into the coating of the held coated electric wire by approaching each other, and to form a dividing slit in the coating that divides the coating in its circumferential direction; a first slit blade position control motor that operates to move one of the pair of slit blade members in a forward and backward direction; a second slit blade position control motor that operates to move the other of the pair of slit blade members in a forward and backward direction, 3. The insulated electric wire intermediate stripping device according to claim 2, wherein the blade positioning adjustment unit is configured to adjust the amount of cutting into the coating of the held insulated electric wire by the pair of slit blade members by controlling the rotation of the first slit blade position control motor and the rotation of the second slit blade position control motor.

4. The slit blade is configured to be movable in the left-right direction with the pair of slit blade members facing each other, a third slit blade position control motor that operates to move the slit blade in the left-right direction; The blade positioning adjustment unit controls the rotation of the third slit blade position control motor to adjust the cutting position of the pair of slit blade members into the coating of the held coated electric wire.

4. The insulated electric wire mid-stripping device according to claim 3, wherein the insulated electric wire mid-stripping device is configured to adjust the thickness of the insulated electric wire.

5. the slit blade is configured to move in the left-right direction with the pair of slit blade members cutting into the coating of the held coated electric wire, thereby forming the dividing slit of a predetermined length extending in the left-right direction in the coating, 5. The insulated electric wire intermediate stripping device according to claim 4, wherein the blade positioning adjustment unit is configured to adjust the length of the dividing slit formed by the pair of slit blade members in the coating of the held insulated electric wire by controlling the rotation of the third slit blade position control motor.

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