JPH06335131A - Method and apparatus for peeling intermediate coating of covered cable - Google Patents

Abstract

PURPOSE:To provide a peeling apparatus at low cost with a simple structure for peeling an intermediate coating of a covered cable. CONSTITUTION:A plurality of linear slits are made in an intermediate coating 33c of a covered cable 31A. Then, a first circular slit in a coating 33 is made with cutting and slitting blades 8 and 9 in a place corresponding to the top end of the linear slit. In this state, the covered cable 31A is moved in a peeling direction so that the intermediate coating 33 is peeled partly. A second circular slit in the coating 33 is made with the cutting and slitting blades 8 and 9 in a place corresponding to the rear end of the linear slit. The covered cable 31A is moved in a forward direction of peeling so that the intermediate coating 33c is removed from the core cable 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for peeling an intermediate coating of a coated wire such as a coated electric wire and an optical fiber cable used in various electric devices.

[0002]

2. Description of the Related Art Generally, a coated electric wire 31 for wiring, which is cut into a predetermined size as shown in FIG. 17, is used for electronic and electric products. This covered electric wire 31 is a core wire 32 made of copper or the like.
Has a coating 33 mainly made of vinyl chloride resin for insulation. Also, the total length L of the covered electric wire 31
1. The length L2 of the coating 33 and the exposed length of the core wire 32, that is, the stripping lengths L3 and L4 of both ends of the coating 33 are processed to have dimensions set according to the place to be used. Further, the intermediate coating 33c may be peeled off in the middle of the coated electric wire 31 in order to connect another coated electric wire through the intermediate terminal fitting. In this specification, the stripped coatings 33a and 33b on the front and rear ends of the coated electric wire 31, the coating 33c on the intermediate portion to be stripped, and the coating body 33 which is not stripped are cut into predetermined lengths. The coated electric wire is referred to as 31, and the coated electric wire before being cut is referred to as 31A.

The applicant of the present application has disclosed an apparatus for automatically processing the coated electric wire 31 described in, for example, Japanese Patent Application Laid-Open No. 61-273.
The automatic wire cutting / peeling device shown in Japanese Patent No. 114 is proposed. In the method of cutting / peeling a covered electric wire in this peeling device, a pair of upper and lower cutting blades facing each other are moved from a retracted position where the blade portions do not cover the covered electric wire to a cutting position to cut the covered electric wire. Then, both cutting blades are moved backward from the cutting position to the retracted position. Further, according to the method of cutting and peeling the covered electric wire, the covered electric wire is moved in its length direction in a state where the both cutting blades are moved to the retracted position. Further, in the method of cutting and peeling the covered electric wire, the cutting blade is moved from the retracted position to the cutting position, and the cutting blade forms an annular slit in the covering of the covered electric wire. Further, this peeling method is to relatively move the coating of the core wire and the wire end of the coated electric wire,
After peeling the coating on the core wire with the cutting blade, the cutting blade is moved backward to the retracted position.

Further, a peeling device has been proposed which independently peels the middle portion of the coating 33 of the coated electric wire 31. This peeling device includes a linear slit forming blade that forms a linear slit in the longitudinal direction of the intermediate coating 33c of the covered electric wire 31, and an intermediate coating 3 corresponding to the front and rear ends of the linear slit.
First forming the first and second annular slits at the same time
And a second annular slit forming blade. And
After forming the linear slits on the intermediate coating, the annular slits are simultaneously formed on both ends of the linear slits with the linear slit forming blade retracted. In this state, the first and second annular slit forming blades are brought close to each other in the longitudinal direction of the covered wire to peel off the intermediate covering from the core wire.

[0005]

The former automatic wire cutting and peeling device has a problem in that it is possible to peel the coating on both ends of the covered electric wire 31, but not the intermediate coating.

Further, the latter intermediate peeling device for the intermediate coating is combined with the former automatic electric wire cutting / peeling device to obtain the structure shown in FIG.
It is possible to automatically process the coated electric wire 31 with the intermediate coating stripped as shown in FIG. However, in this case, since a complicated and expensive peeling device dedicated to peeling the intermediate coating is separately required, there is a problem that the cost of the entire device cannot be reduced.

An object of the present invention is that the annular slit forming blade for stripping the intermediate coating of the coated wire can also be used for the stripping operation of the end coating of the coated wire, simplifying the stripping device and reducing the product cost. It is an object of the present invention to provide a method and a device for peeling an intermediate coating of a coated wire which can be achieved.

[0008]

In order to achieve the above object, in the invention according to claim 1, the linear slit forming blade of the linear slit forming device forms a linear slit for the intermediate coating of the coated wire. First step of forming in the longitudinal direction of the covered wire, and the tip of the linear slit formed in the intermediate coating of the covered wire by the annular slit forming blade of the annular slit forming device arranged on the downstream side of the linear slit forming device. A second step of forming a first annular slit with respect to the coating corresponding to the portion, and the annular slit forming blade and the covered wire are formed into an annular slit by a relative moving mechanism in a state where the annular slit forming blade is held at the cutting position. A third step of relatively moving the blade toward the linear slit side to peel the tip of the intermediate coating corresponding to the linear slit halfway, and the linear slit A fourth step of forming a second annular slit with a plurality of annular slit forming blades on the coating corresponding to the rear end of the ring, and the annular slit forming blade with the annular slit forming blade held at the cutting position. And a fifth step of removing the intermediate coating corresponding to the linear slit from the core wire by relatively moving the coated wire by the relative moving mechanism so that the annular slit forming blade is directed toward the linear slit side.

According to the second aspect of the present invention, a linear slit forming device having a linear slit forming blade for forming a plurality of linear slits in the longitudinal direction of the intermediate portion of the covered wire, The coated wire transfer mechanism for transferring the coated wire having the linear slit formed by the linear slit forming device, and the coating corresponding to the front and rear ends of the linear slit of the coated wire transferred by the coated wire transfer mechanism A first annular slit forming mechanism having a plurality of first annular slit forming blades that are position-switched between a position for forming one annular slit and a retracted position; and a covered wire transferred by the covered wire transfer mechanism. A plurality of second annular slit forming blades that are position-switched between a position where the second annular slit is formed on the coating corresponding to the front and rear ends of the linear slit and a retracted position. While a second annular slit forming mechanism, the relative covered by the first and second annular slit forming blades to form the first and second annular slit,
A relative movement mechanism for relatively moving the covered wire and the annular slit forming blade in the direction toward the linear slit, the linear slit forming device, the covered wire transfer mechanism, first and second
And an operation control means for controlling the operations of the annular slit forming mechanism and the relative movement mechanism based on a predetermined program.

Further, in the invention according to claim 3,
The first annular slit forming mechanism also serves as the second annular slit forming mechanism.

[0011]

According to the present invention, the linear slit forming device is operated by the control signal from the operation control means, and the forming device forms the linear slit in the intermediate portion of the covered wire.

Next, the covered wire is transferred by the operation of the covered wire transfer mechanism and the linear slit formed in the cover is moved to a position corresponding to the first annular slit forming blade of the first annular slit forming mechanism and stopped. It In this state, the first annular slit forming blade moves from the retracted position to the cutting position for the coating and is stopped, and the first annular slit is formed in the coating corresponding to the tip of the linear slit. After that, the relative movement mechanism is operated to relatively move the covered wire and the first annular slit forming blade toward the linear slit side, and the tip of the intermediate covering corresponding to the linear slit is separated from the covering body in the first annular slit. .

Thereafter, the first annular slit forming blade is moved from the cutting position to the retracted position, and the relative movement mechanism relatively moves the covered wire and the second annular slit forming blade so that the rear end of the linear slit is moved. It moves to a position corresponding to the second annular slit forming blade and is stopped.

Next, the second annular slit forming blade is moved from the retracted position to the cut position to form the second annular slit on the coating corresponding to the rear end of the linear slit.
Further, in this state, the coated wire and the second annular slit forming blade are relatively moved to the linear slit side by the relative movement mechanism, and the intermediate coating corresponding to the linear slit is peeled from the core wire.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in an automatic cutting / peeling device for a covered electric wire will be described below with reference to the drawings.

The wire cutting / peeling device of this embodiment is provided on the front surface of the case 1 as shown in FIG. 1, and is provided with a pair of rollers 2 and 3 for feeding or pulling back the covered wire 31A by forward and reverse rotations. The electric wire transfer mechanism 4 also serves as a relative movement mechanism. Further, this electric wire cutting / peeling device also includes an electric wire transfer mechanism 7 which also serves as a relative moving mechanism including a pair of rollers 5 and 6 for pulling out or sending back the covered electric wire 31A by forward and reverse rotations. Further, the electric wire cutting / peeling device also serves as a cutting mechanism for the covered electric wire 31A, and the fixed cutting blade 8 and the movable cutting blade for forming the cuts of the first and second annular slits S1, S2 in the covering 33. Cutting / slit forming mechanism 1 with 9
It has 0. Furthermore, this wire cutting / peeling device
The covered electric wire 31 is provided on the upstream side of the electric wire transfer mechanism 4.
The coating 33 of A is provided with a linear slit forming device K for forming a plurality of (two in this embodiment) linear slits St.

A guide tube 11 for guiding the covered electric wire 31A between the rollers 2 and 3 is provided on the front surface of the case 1, and the covered electric wire 31A transferred by the rollers 2 and 3 is directed to the cutting / slit forming / combining mechanism 10 side. A guide tube 12 for guiding and a guide tube 13 for guiding the covered electric wire 31A between the rollers 5, 6.
Are supported horizontally.

In the case 1, the electric wire transfer mechanism 4, the electric wire transfer mechanism 7, and the cutting / slit forming mechanism 10 described above are provided.
Also, an operation control means 14 is provided for outputting various operation signals to the linear slit forming device K or the like based on a preset program, or outputting an operation signal based on a newly set setting signal. ing.

The operation control means 14 will be described with reference to FIG. 2. The control means 14 has a central processing circuit (CPU) 15, a read only memory (ROM) 16 and a random access memory for performing various kinds of arithmetic processing operations. A control circuit 18 including a (RAM) 17 is provided. The control circuit 18 includes a first pulse motor M1 for rotating the rollers 2 and 3 in the forward and reverse directions and a second pulse motor M for rotating the rollers 5 and 6 in the forward and reverse directions.
2 is connected. Further, the control circuit 18 is connected to a third pulse motor M3 for driving the movable cutting blade 9 and an electromagnetic solenoid 38 for driving the linear slit forming device K.

As shown in FIG. 3, the movable cutting blade 9 is engaged with a guide groove 19a of a guide member 19 arranged at a predetermined position so as to be vertically movable. A rack 20 is attached to the movable cutting blade 9, and a pinion 21 supported by the rotary shaft of the third pulse motor M3 is attached to the rack 20.
Are in mesh. A V-shaped blade portion 8a is formed at the upper end of the fixed cutting blade 8, and an inverted V-shaped blade portion 9a is formed at the lower end of the movable cutting blade 9. Then, when the third pulse motor M3 is rotated forward, as shown in FIG.
The movable cutting blade 9 is moved downward from the retracted position separated from the fixed cutting blade 8 as shown in FIG.
The coated electric wire 31A inserted between the blade portions 8a and 9a can be cut by a and 9a. Further, the control circuit 18 controls the number of revolutions of the third motor M3 to cover the coated electric wire 31A with the blade portions 8a and 9a of the two cutting blades 8 and 9.
It is also possible to form an annular slit having a desired depth with respect to 3.

Further, as shown in FIG. 2, an operation box 22 is connected to the control circuit 18, and the box 22 is of a digit switch type for setting and displaying the cut length (total length) L1 of the covered electric wire 31A. The length setting indicator 23 is connected. The box 22 has a peeling length L3,
Setting indicators 24A and 24B for setting and displaying L4 are connected. Similarly, the operation box 22 is connected with a setting indicator 25 for setting and displaying the distance L5 (see FIG. 17) from the tip of the coated electric wire 31A to the peeling position of the intermediate coating 33c. Further, in the box 22, the distance required for the blade portions 8a, 9a of both cutting blades 8, 9 to descend from the retracted position shown in FIG. 4 to the position where it is just in contact with the outer periphery of the core wire 32 as shown in FIG. That is, the setting indicator 26 for setting and displaying the maximum depth of cut into the covering 33 is connected. With this setting indicator 26, the covered electric wire 3
When the diameter D of the core wire 32 of 1A is, for example, 3 mm, the moving distance of the movable cutting blade 9 is set to, for example, 10 mm. Further, a start switch 27, a stop switch 28, a feed switch 29, etc. are connected to the box 22.

Next, a linear slit forming device K for forming a linear slit St in the longitudinal direction of the intermediate coating 33c in the intermediate portion of the coated electric wire 31A will be described with reference to FIGS. .

As shown in FIGS. 6 and 7, on the upper surface of the support plate 34, a pair of left and right columns 35 are erected parallel to each other at a predetermined interval in the vertical direction. A fixed support plate 36 is erected and fixed between the upper ends of both columns 35, and both sides of a movable support plate 37 are supported in the middle by reciprocating vertically. The movable support plate 37 can be reciprocated by a plunger 39 of an electromagnetic solenoid 38 fixed to the upper surface of the fixed support plate 36.

A movable support block 40 and a fixed support block 41 are attached to the movable support plate 37 and the fixed support plate 36, and semi-cylindrical grooves 40a and 41a are formed on the opposing surfaces of both blocks 40 and 41, respectively. ing. A plate-shaped movable blade 42 and a fixed blade 43 are attached to the bottoms of the grooves 40a and 41a so as to face each other. Guide plates 44 having guide grooves 44a for guiding the covered electric wire 31A into the grooves 40a, 41a are attached to both right and left side surfaces of the fixed support block 41.

Next, by using the automatic electric wire cutting / peeling device constructed as described above, the end coating 33 of the covered electric wire 31A is formed.
The operation of peeling a and 33b, cutting the coated electric wire 31A into a predetermined length, and peeling the intermediate coating 33c will be described.

First, prior to the cutting / peeling action of the covered electric wire 31A, the covered electric wire 31A is unwound from a winding drum (not shown) and inserted into the guide groove 44a of the guide plate 44 of the linear slit forming device K. After that, the feed switch 29 of the operation box 22 is turned on, and while rotating the rollers 2 and 3 in the normal direction (see the arrow), the tip of the covered electric wire 31A is inserted into the guide tube 11, Supply between the rotating rollers 2 and 3. And the covered electric wire 31A
Is moved into the guide tube 12 and further inserted between the cutting blades 8 and 9, the feeding switch 29 is turned off to stop the rollers 2 and 3.

In this state, the length setting indicator 23 of the covered electric wire 31 is operated to set and display the cutting length L1, and further the peeling length setting indicators 24A and 24B are operated to cut the covered electric wire 31. Peeling length L3, L4 at the end of
Are set and displayed respectively. Further, the setting display 25 is operated to set and display the distance L5 from the tip of the covered electric wire 31A to the linear slit St. Further, the cut depth setting indicator 26 of the coating is operated to set the cut depth according to the diameter D of the electric wire 41A. Then, when the start switch 27 is turned on in this state, cutting and peeling of the covered electric wire 31 shown in FIG. 17 are automatically repeated as follows.

That is, first, the movable cutting blade 9 is moved downward from the retracted position shown in FIGS. 1, 3 and 4 by the forward rotation of the third pulse motor M3, and the tip of the covered electric wire 31A is cut and removed. After that, the movable cutting blade 9 is returned to the retracted position shown in FIGS. 1, 3 and 4 by the reverse rotation of the third pulse motor M3.

Next, the rollers 2 and 3 are rotated in the normal direction or the reverse direction so that the linear slit forming device K is started from the tip of the covered electric wire 31A.
The covered electric wire 31A is fed in or pulled back until the distance between the two blades 42 and 43 becomes L5. In this state, an operation signal is output from the control circuit 18 and the electromagnetic solenoid 38
Is operated, the movable blade 42 is moved toward the fixed blade 43, and a pair of upper and lower linear slits St are formed on the intermediate coating 33c from which the coated electric wire 31A is stripped, as shown in FIG. 9 (see FIG. 12). It

Next, the first pulse motor M1 rotates the rollers 2 and 3 in the forward or reverse direction so that the tip of the covered electric wire 31A is removed from the cutting blades 8 and 9 by a predetermined length (peeling) as shown in FIG. When the rollers are moved to a position separated by a length L3, the rollers 2 and 3 are stopped.

In this state, the third pulse motor M3 is positively rotated a predetermined number of times so that the movable cutting blade 9 moves from the retracted position shown by a solid line to a position where a cut is made in the covering 33 of the covered electric wire 31A as shown by a chain line. Moved and stopped. In this state, as shown in FIG. 5, the blade portions 8a, 9a of both cutting blades 8, 9 are
Contacts the core wire 32. Then, as shown in FIG. 5, the rollers 2, 3 are held with both cutting blades 8, 9 held at the cutting positions.
Is reversely rotated by a predetermined number by the first pulse motor M1, the covered electric wire 31A moves a predetermined distance L3 as shown in FIG.
Only ´is pulled back. Therefore, the end coating 33 to be peeled off
a is relatively moved in the peeling direction along the core wire 32, the end coating 33a is removed from the tip of the covered electric wire 31A, and the peeling operation at the tip of the covered electric wire 31A ends.

Further, when the peeling operation at the tip of the covered electric wire 31A is completed, the movable cutting blade 9 is stopped moving from the cutting position shown by the chain line in FIG. 11 to the retracted position shown by the solid line.

Next, when both the rollers 2 and 3 are normally rotated by a predetermined number, the tip end of the covered electric wire 31A is inserted between the rollers 5 and 6 which are normally rotated, and the covered electric wire 31A is cut into both the cutting blades 8. ，
A predetermined length L5 is fed from 9 and rollers 2, 3,
5 and 6 are stopped. (See FIG. 12) Next, the movable cutting blade 9 is moved downward as shown by the chain line in FIG. 12, and the first annular slit S1 is formed on the outer periphery of the coating 33 corresponding to the tip of the linear slit St. To be done. After that, the rollers 2, 3, 5 and 6 are positively rotated a predetermined number of times so that the covered electric wire 3
1A is moved by a short distance L6 as shown in FIG.
Therefore, the tip end of the intermediate coating 33c is pulled away from the coating main body 33, and the core wire 32 is peeled halfway.

Further, when the above operation is completed, the movable cutting blade 9 is returned to the retracted position, and each roller 2,
As shown in FIG. 14, the coated electric wire 31A moves to a position where the rear end portion of the linear slit St corresponds to both the cutting blades 8 and 9 and is stopped by rotating a predetermined number of 3, 5 and 6 forward. Next, as shown by the chain line in FIG. 14, the movable cutting blade 9 is moved from the retracted position to the cutting position again, and the second annular slit S2 is formed on the outer periphery of the coating 33 corresponding to the rear end of the linear slit St. To be done. After that, each roller 2, 3, 5, 6
Is reversely rotated by a predetermined number and the covered electric wire 31A is moved by a predetermined distance L7 as shown in FIG. 15, so that the intermediate cover 33c is completely peeled from the core wire 32. After that, the movable cutting blade 9 returns to the retracted position.

When the peeling operation of the intermediate coating 33c is completed, each of the rollers 2, 3, 5 and 6 is normally rotated by a predetermined number of times to move the covered electric wire 31A to a predetermined distance, that is, the covered electric wire 31.
The distance from the tip of A to both cutting blades 8 and 9 is moved by a distance of L1 and stopped. And the movable cutting blade 9
Is moved down from the retracted position to the cut position, and the covered electric wire 31A
Is cut to a predetermined length L1, and the peeling operation of the rear end of the covered electric wire 31 is performed in the same manner as the peeling operation of the front end described above.
That is, although not shown, both rollers 5 and 6 are reversely rotated and the covered electric wire 31 is sent back by the length L4, then the movable cutting blade 9 is moved to the cutting position, and the end covering 33b.
An annular slit is formed in the. Next, when the rollers 5 and 6 are normally rotated and the covered electric wire 31 is transferred, the end covering 33b from the rear end of the electric wire 31 is removed from the core wire 32.

Although the cutting and peeling work is completed by turning on the stop switch 28, normally, the number set by a setting indicator (not shown) for setting and displaying the number of processed coated electric wires 31 is automatically processed. To be done.

In the embodiment of the present invention, the linear slit St is formed in advance on the covered electric wire 31A by the linear slit forming device K. After that, the first annular slit S1 is formed at the tip of the linear slit St by using both cutting blades 8 and 9 that move the covered electric wire 31A and peel off the coverings 33a and 33b at both ends of the electric wire. Furthermore, the covered electric wire 3
1A is fed and operated to peel off the intermediate coating 33c from the core wire 32 halfway. After that, the linear slit S
A second annular slit S2 is formed at the rear end of t. further,
Since the coated electric wire 31A is pulled back to peel off the intermediate coating 33c from the core wire 32, the following effects can be obtained. That is, it is not necessary to provide slit forming blades that form the annular slits S1 and S2 only for peeling the intermediate coating 33c. Moreover, since the intermediate coating 33c is peeled off using the cutting blades 8 and 9 of the existing electric wire cutting / peeling device, the structure of the peeling device can be simplified, the manufacturing can be easily performed, and the cost of the product can be reduced. .

The present invention is not limited to the above-described embodiments, and the configurations of the respective parts may be modified and embodied as follows, for example, without departing from the spirit of the present invention.

(1) As shown in FIG. 16, both cutting blades 8,
The same cutting blades 8A and 9A as 9 are provided, and the first and second annular slits S1 and S2 are simultaneously formed on the coating 33 on the front and rear ends of the linear slit St. By peeling off the intermediate coating 33c by moving both cutting blades 8, 9 and 8A, 9A in a direction in which they approach each other.

(2) In the above-described embodiment, the fixed and movable cutting blades 8 and 9 are moved in the front-back direction by the mechanism for moving in the longitudinal direction of the covered electric wire 31A to cover the both ends of the covered electric wire 31 with the coverings 33a and 33b. And peeling off the intermediate coating 33c.

(3) Although the fixed and movable cutting blades 8 and 9 are V-shaped in the above embodiment, they may be arcuate or polygonal. In addition, three or more blades should be separated from each other in, for example, three directions or four directions.

(4) Movable blade 4 of the slit forming device K
Instead of the 2 and the fixed blade 43, the slit St may be formed in the intermediate coating 33c by moving the blade toward or away from the virtual center axis from three directions like a chuck of a drill.

(5) A plurality of pairs of rollers 2, 3, 5, 6, cutting blades 8, 9 and guide tubes 11 to 13 are provided so that a plurality of covered electric wires 31A can be simultaneously cut and peeled.

[0044]

As described above in detail, according to the present invention, it is not necessary to provide a forming blade for forming an annular slit for peeling an intermediate coating, and a slit forming blade of an existing wire cutting / peeling device is used. Since the intermediate coating can be peeled off, the structure of the peeling device can be simplified to facilitate the production,
Product cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front sectional view of an automatic cutting / peeling device for a coated electric wire embodying the present invention.

FIG. 2 is a block circuit diagram showing an operation control means.

FIG. 3 is a front view showing a combined cutting / cutting mechanism.

FIG. 4 is a partial cross-sectional view showing the relationship between the cutting blade and the covered electric wire in the retracted position.

FIG. 5 is a partial cross-sectional view showing a relationship between a cutting blade at a cutting position and a covered electric wire.

FIG. 6 is a front view showing a linear slit forming device.

FIG. 7 is an exploded perspective view showing a linear slit forming device.

FIG. 8 is an exploded perspective view showing a main part of the linear slit forming device.

FIG. 9 is a sectional view showing a main part of a linear slit forming device.

FIG. 10 is a cross-sectional view illustrating a peeling process.

FIG. 11 is a cross-sectional view illustrating a peeling process.

FIG. 12 is a cross-sectional view illustrating a peeling process.

FIG. 13 is a cross-sectional view illustrating a peeling process.

FIG. 14 is a cross-sectional view illustrating a peeling process.

FIG. 15 is a cross-sectional view illustrating a peeling process.

FIG. 16 is a partial cross-sectional view showing another embodiment of the present invention.

FIG. 17 is a front view of the coated electric wire that has been cut and peeled.

[Explanation of symbols]

1 ... Case, 2, 3 ... Feeding / pulling back roller, 4
(7) ... Wire transfer mechanism that also serves as a relative movement mechanism, 5, 6
... Drawer / feedback roller, 8 (9) ... Fixed cutting blade (movable cutting blade) as cutting and annular slit forming blade, 1
0 ... Cutting / annular slit forming combined mechanism, 14 ... Operation control means, 31 (31A) ... Coated electric wire, 32 ... Core wire, 33 ...
Coating, 33c ... Intermediate coating, 42 ... Movable blade as linear slit forming blade, 43 ... Fixed blade as linear slit forming blade, S1 ... First annular slit, S2 ... Second annular slit, St ... Linear slit , K ... Linear slit forming device, M1 to M3 ... First to third pulse motors.

Claims (3)

[Claims] 1. A first step of forming a linear slit in a longitudinal direction of a covered wire with respect to an intermediate coating of the covered wire by a linear slit forming blade of the linear slit forming apparatus, and a downstream of the linear slit forming apparatus. A second step of forming a first annular slit on the coating corresponding to the tip of the linear slit formed on the intermediate coating of the coated wire by the annular slit forming blade of the annular slit forming device arranged on the side; In the state where the slit forming blade is held at the cutting position, the annular slit forming blade and the covered wire are relatively moved by the relative movement mechanism so that the annular slit forming blade is directed toward the linear slit side, and the intermediate corresponding to the linear slit. A third step of peeling the tip of the coating halfway, and a second annular shape with a plurality of annular slit forming blades for the coating corresponding to the rear end of the linear slit. A fourth step of forming a slit, and in a state where the annular slit forming blade is held at a cutting position, the annular slit forming blade and the covered wire are moved toward the linear slit side by a relative moving mechanism. A method of peeling an intermediate coating of a coated wire, which comprises a fifth step of removing the intermediate coating corresponding to the linear slit by relative movement from the core wire. 2. A linear slit forming device having a linear slit forming blade for forming a plurality of linear slits in a longitudinal direction with respect to an intermediate portion of a covered wire, and a linear slit forming device for forming a linear slit. A covered wire transfer mechanism for transferring a covered wire having a slit formed therein, and a position for forming a first annular slit in a cover corresponding to the front and rear ends of the linear slit of the covered wire transferred by the covered wire transfer mechanism, A first annular slit forming mechanism having a plurality of first annular slit forming blades that are position-switched between a retracted position, and both front and rear ends of the linear slit of the covered wire transferred by the covered wire transfer mechanism. A second annular slit forming mechanism having a plurality of second annular slit forming blades that are position-switched between a position where the second annular slit is formed in the corresponding coating and a retracted position. In order to relatively move the covered wire and the annular slit forming blade in the direction toward the linear slit in a state where the first and second annular slits are formed on the coating by the first and second annular slit forming blades, Of the relative movement mechanism, the linear slit forming device, the covered wire transfer mechanism, the first and second annular slit forming mechanisms, and the operation control means for controlling the operation of the relative movement mechanism based on a predetermined program. A peeling device for an intermediate coating of a coated wire, which is characterized in that: 3. The stripping device for an intermediate coating of a coated wire according to claim 2, wherein the first annular slit forming mechanism also serves as the second annular slit forming mechanism.